hotspot/src/share/vm/oops/instanceKlass.cpp
author never
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permissions -rw-r--r--
7032306: Fastdebug build failure on Solaris with SS11 compilers Reviewed-by: kvn, iveresov
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/*
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 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "classfile/javaClasses.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "classfile/verifier.hpp"
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#include "classfile/vmSymbols.hpp"
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#include "compiler/compileBroker.hpp"
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#include "gc_implementation/shared/markSweep.inline.hpp"
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#include "gc_interface/collectedHeap.inline.hpp"
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#include "interpreter/oopMapCache.hpp"
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#include "interpreter/rewriter.hpp"
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#include "jvmtifiles/jvmti.h"
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#include "memory/genOopClosures.inline.hpp"
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#include "memory/oopFactory.hpp"
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#include "memory/permGen.hpp"
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#include "oops/instanceKlass.hpp"
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#include "oops/instanceMirrorKlass.hpp"
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#include "oops/instanceOop.hpp"
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#include "oops/methodOop.hpp"
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#include "oops/objArrayKlassKlass.hpp"
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#include "oops/oop.inline.hpp"
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#include "oops/symbol.hpp"
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#include "prims/jvmtiExport.hpp"
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#include "prims/jvmtiRedefineClassesTrace.hpp"
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#include "runtime/fieldDescriptor.hpp"
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#include "runtime/handles.inline.hpp"
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#include "runtime/javaCalls.hpp"
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#include "runtime/mutexLocker.hpp"
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#include "services/threadService.hpp"
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#include "utilities/dtrace.hpp"
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#ifdef TARGET_OS_FAMILY_linux
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# include "thread_linux.inline.hpp"
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#endif
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#ifdef TARGET_OS_FAMILY_solaris
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# include "thread_solaris.inline.hpp"
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#endif
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#ifdef TARGET_OS_FAMILY_windows
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# include "thread_windows.inline.hpp"
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#endif
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#ifndef SERIALGC
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#include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
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#include "gc_implementation/g1/g1OopClosures.inline.hpp"
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#include "gc_implementation/g1/g1RemSet.inline.hpp"
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#include "gc_implementation/g1/heapRegionSeq.inline.hpp"
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#include "gc_implementation/parNew/parOopClosures.inline.hpp"
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#include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp"
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#include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
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#include "oops/oop.pcgc.inline.hpp"
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#endif
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#ifdef COMPILER1
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#include "c1/c1_Compiler.hpp"
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#endif
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#ifdef DTRACE_ENABLED
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HS_DTRACE_PROBE_DECL4(hotspot, class__initialization__required,
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  char*, intptr_t, oop, intptr_t);
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HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__recursive,
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  char*, intptr_t, oop, intptr_t, int);
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HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__concurrent,
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  char*, intptr_t, oop, intptr_t, int);
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HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__erroneous,
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  char*, intptr_t, oop, intptr_t, int);
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HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__super__failed,
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  char*, intptr_t, oop, intptr_t, int);
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HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__clinit,
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  char*, intptr_t, oop, intptr_t, int);
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HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__error,
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  char*, intptr_t, oop, intptr_t, int);
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HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__end,
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  char*, intptr_t, oop, intptr_t, int);
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#define DTRACE_CLASSINIT_PROBE(type, clss, thread_type)          \
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  {                                                              \
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    char* data = NULL;                                           \
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    int len = 0;                                                 \
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    Symbol* name = (clss)->name();                               \
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    if (name != NULL) {                                          \
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      data = (char*)name->bytes();                               \
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      len = name->utf8_length();                                 \
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    }                                                            \
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    HS_DTRACE_PROBE4(hotspot, class__initialization__##type,     \
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      data, len, (clss)->class_loader(), thread_type);           \
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  }
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#define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \
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  {                                                              \
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    char* data = NULL;                                           \
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    int len = 0;                                                 \
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    Symbol* name = (clss)->name();                               \
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    if (name != NULL) {                                          \
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      data = (char*)name->bytes();                               \
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      len = name->utf8_length();                                 \
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    }                                                            \
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    HS_DTRACE_PROBE5(hotspot, class__initialization__##type,     \
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      data, len, (clss)->class_loader(), thread_type, wait);     \
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  }
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#else //  ndef DTRACE_ENABLED
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#define DTRACE_CLASSINIT_PROBE(type, clss, thread_type)
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#define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait)
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#endif //  ndef DTRACE_ENABLED
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bool instanceKlass::should_be_initialized() const {
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  return !is_initialized();
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}
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klassVtable* instanceKlass::vtable() const {
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  return new klassVtable(as_klassOop(), start_of_vtable(), vtable_length() / vtableEntry::size());
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}
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klassItable* instanceKlass::itable() const {
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  return new klassItable(as_klassOop());
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}
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void instanceKlass::eager_initialize(Thread *thread) {
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  if (!EagerInitialization) return;
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  if (this->is_not_initialized()) {
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    // abort if the the class has a class initializer
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    if (this->class_initializer() != NULL) return;
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    // abort if it is java.lang.Object (initialization is handled in genesis)
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    klassOop super = this->super();
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    if (super == NULL) return;
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    // abort if the super class should be initialized
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    if (!instanceKlass::cast(super)->is_initialized()) return;
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    // call body to expose the this pointer
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    instanceKlassHandle this_oop(thread, this->as_klassOop());
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    eager_initialize_impl(this_oop);
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  }
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}
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void instanceKlass::eager_initialize_impl(instanceKlassHandle this_oop) {
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  EXCEPTION_MARK;
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  ObjectLocker ol(this_oop, THREAD);
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  // abort if someone beat us to the initialization
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  if (!this_oop->is_not_initialized()) return;  // note: not equivalent to is_initialized()
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  ClassState old_state = this_oop->_init_state;
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  link_class_impl(this_oop, true, THREAD);
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  if (HAS_PENDING_EXCEPTION) {
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    CLEAR_PENDING_EXCEPTION;
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    // Abort if linking the class throws an exception.
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    // Use a test to avoid redundantly resetting the state if there's
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    // no change.  Set_init_state() asserts that state changes make
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    // progress, whereas here we might just be spinning in place.
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    if( old_state != this_oop->_init_state )
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      this_oop->set_init_state (old_state);
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  } else {
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    // linking successfull, mark class as initialized
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    this_oop->set_init_state (fully_initialized);
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    // trace
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    if (TraceClassInitialization) {
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      ResourceMark rm(THREAD);
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      tty->print_cr("[Initialized %s without side effects]", this_oop->external_name());
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    }
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  }
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}
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// See "The Virtual Machine Specification" section 2.16.5 for a detailed explanation of the class initialization
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// process. The step comments refers to the procedure described in that section.
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// Note: implementation moved to static method to expose the this pointer.
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void instanceKlass::initialize(TRAPS) {
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  if (this->should_be_initialized()) {
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    HandleMark hm(THREAD);
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    instanceKlassHandle this_oop(THREAD, this->as_klassOop());
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    initialize_impl(this_oop, CHECK);
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    // Note: at this point the class may be initialized
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    //       OR it may be in the state of being initialized
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    //       in case of recursive initialization!
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  } else {
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    assert(is_initialized(), "sanity check");
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  }
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}
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bool instanceKlass::verify_code(
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    instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) {
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  // 1) Verify the bytecodes
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  Verifier::Mode mode =
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    throw_verifyerror ? Verifier::ThrowException : Verifier::NoException;
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  return Verifier::verify(this_oop, mode, this_oop->should_verify_class(), CHECK_false);
1
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}
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// Used exclusively by the shared spaces dump mechanism to prevent
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// classes mapped into the shared regions in new VMs from appearing linked.
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void instanceKlass::unlink_class() {
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  assert(is_linked(), "must be linked");
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  _init_state = loaded;
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}
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void instanceKlass::link_class(TRAPS) {
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  assert(is_loaded(), "must be loaded");
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  if (!is_linked()) {
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    instanceKlassHandle this_oop(THREAD, this->as_klassOop());
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    link_class_impl(this_oop, true, CHECK);
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  }
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}
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// Called to verify that a class can link during initialization, without
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// throwing a VerifyError.
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bool instanceKlass::link_class_or_fail(TRAPS) {
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  assert(is_loaded(), "must be loaded");
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  if (!is_linked()) {
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    instanceKlassHandle this_oop(THREAD, this->as_klassOop());
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    link_class_impl(this_oop, false, CHECK_false);
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  }
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  return is_linked();
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}
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bool instanceKlass::link_class_impl(
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    instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) {
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  // check for error state
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  if (this_oop->is_in_error_state()) {
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    ResourceMark rm(THREAD);
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    THROW_MSG_(vmSymbols::java_lang_NoClassDefFoundError(),
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               this_oop->external_name(), false);
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  }
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  // return if already verified
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  if (this_oop->is_linked()) {
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    return true;
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  }
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  // Timing
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  // timer handles recursion
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  assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl");
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  JavaThread* jt = (JavaThread*)THREAD;
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  // link super class before linking this class
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  instanceKlassHandle super(THREAD, this_oop->super());
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  if (super.not_null()) {
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    if (super->is_interface()) {  // check if super class is an interface
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      ResourceMark rm(THREAD);
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      Exceptions::fthrow(
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        THREAD_AND_LOCATION,
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        vmSymbols::java_lang_IncompatibleClassChangeError(),
1
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        "class %s has interface %s as super class",
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        this_oop->external_name(),
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        super->external_name()
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      );
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      return false;
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    }
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    link_class_impl(super, throw_verifyerror, CHECK_false);
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  }
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  // link all interfaces implemented by this class before linking this class
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  objArrayHandle interfaces (THREAD, this_oop->local_interfaces());
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  int num_interfaces = interfaces->length();
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  for (int index = 0; index < num_interfaces; index++) {
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    HandleMark hm(THREAD);
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    instanceKlassHandle ih(THREAD, klassOop(interfaces->obj_at(index)));
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    link_class_impl(ih, throw_verifyerror, CHECK_false);
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  }
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  // in case the class is linked in the process of linking its superclasses
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  if (this_oop->is_linked()) {
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    return true;
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  }
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  // trace only the link time for this klass that includes
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  // the verification time
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  PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(),
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                             ClassLoader::perf_class_link_selftime(),
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                             ClassLoader::perf_classes_linked(),
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                             jt->get_thread_stat()->perf_recursion_counts_addr(),
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                             jt->get_thread_stat()->perf_timers_addr(),
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                             PerfClassTraceTime::CLASS_LINK);
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1
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  // verification & rewriting
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  {
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    ObjectLocker ol(this_oop, THREAD);
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    // rewritten will have been set if loader constraint error found
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    // on an earlier link attempt
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    // don't verify or rewrite if already rewritten
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    if (!this_oop->is_linked()) {
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      if (!this_oop->is_rewritten()) {
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        {
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          // Timer includes any side effects of class verification (resolution,
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          // etc), but not recursive entry into verify_code().
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          PerfClassTraceTime timer(ClassLoader::perf_class_verify_time(),
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                                   ClassLoader::perf_class_verify_selftime(),
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                                   ClassLoader::perf_classes_verified(),
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                                   jt->get_thread_stat()->perf_recursion_counts_addr(),
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                                   jt->get_thread_stat()->perf_timers_addr(),
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                                   PerfClassTraceTime::CLASS_VERIFY);
1
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          bool verify_ok = verify_code(this_oop, throw_verifyerror, THREAD);
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          if (!verify_ok) {
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            return false;
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          }
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        }
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        // Just in case a side-effect of verify linked this class already
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        // (which can sometimes happen since the verifier loads classes
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        // using custom class loaders, which are free to initialize things)
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        if (this_oop->is_linked()) {
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          return true;
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        }
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        // also sets rewritten
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        this_oop->rewrite_class(CHECK_false);
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      }
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      // Initialize the vtable and interface table after
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      // methods have been rewritten since rewrite may
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      // fabricate new methodOops.
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      // also does loader constraint checking
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      if (!this_oop()->is_shared()) {
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        ResourceMark rm(THREAD);
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        this_oop->vtable()->initialize_vtable(true, CHECK_false);
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        this_oop->itable()->initialize_itable(true, CHECK_false);
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      }
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#ifdef ASSERT
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      else {
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        ResourceMark rm(THREAD);
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   350
        this_oop->vtable()->verify(tty, true);
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diff changeset
   351
        // In case itable verification is ever added.
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diff changeset
   352
        // this_oop->itable()->verify(tty, true);
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diff changeset
   353
      }
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parents:
diff changeset
   354
#endif
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   355
      this_oop->set_init_state(linked);
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parents:
diff changeset
   356
      if (JvmtiExport::should_post_class_prepare()) {
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diff changeset
   357
        Thread *thread = THREAD;
489c9b5090e2 Initial load
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diff changeset
   358
        assert(thread->is_Java_thread(), "thread->is_Java_thread()");
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parents:
diff changeset
   359
        JvmtiExport::post_class_prepare((JavaThread *) thread, this_oop());
489c9b5090e2 Initial load
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parents:
diff changeset
   360
      }
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parents:
diff changeset
   361
    }
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diff changeset
   362
  }
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   363
  return true;
489c9b5090e2 Initial load
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parents:
diff changeset
   364
}
489c9b5090e2 Initial load
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parents:
diff changeset
   365
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parents:
diff changeset
   366
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diff changeset
   367
// Rewrite the byte codes of all of the methods of a class.
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parents:
diff changeset
   368
// Three cases:
489c9b5090e2 Initial load
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diff changeset
   369
//    During the link of a newly loaded class.
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parents:
diff changeset
   370
//    During the preloading of classes to be written to the shared spaces.
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   371
//      - Rewrite the methods and update the method entry points.
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parents:
diff changeset
   372
//
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   373
//    During the link of a class in the shared spaces.
489c9b5090e2 Initial load
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   374
//      - The methods were already rewritten, update the metho entry points.
489c9b5090e2 Initial load
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diff changeset
   375
//
489c9b5090e2 Initial load
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   376
// The rewriter must be called exactly once. Rewriting must happen after
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   377
// verification but before the first method of the class is executed.
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parents:
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   378
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   379
void instanceKlass::rewrite_class(TRAPS) {
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   380
  assert(is_loaded(), "must be loaded");
489c9b5090e2 Initial load
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   381
  instanceKlassHandle this_oop(THREAD, this->as_klassOop());
489c9b5090e2 Initial load
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parents:
diff changeset
   382
  if (this_oop->is_rewritten()) {
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parents:
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   383
    assert(this_oop()->is_shared(), "rewriting an unshared class?");
489c9b5090e2 Initial load
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   384
    return;
489c9b5090e2 Initial load
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diff changeset
   385
  }
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parents:
diff changeset
   386
  Rewriter::rewrite(this_oop, CHECK); // No exception can happen here
489c9b5090e2 Initial load
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   387
  this_oop->set_rewritten();
489c9b5090e2 Initial load
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parents:
diff changeset
   388
}
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parents:
diff changeset
   389
489c9b5090e2 Initial load
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parents:
diff changeset
   390
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parents:
diff changeset
   391
void instanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) {
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parents:
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   392
  // Make sure klass is linked (verified) before initialization
489c9b5090e2 Initial load
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parents:
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   393
  // A class could already be verified, since it has been reflected upon.
489c9b5090e2 Initial load
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diff changeset
   394
  this_oop->link_class(CHECK);
489c9b5090e2 Initial load
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parents:
diff changeset
   395
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0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
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diff changeset
   396
  DTRACE_CLASSINIT_PROBE(required, instanceKlass::cast(this_oop()), -1);
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parents: 4584
diff changeset
   397
0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
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diff changeset
   398
  bool wait = false;
0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
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parents: 4584
diff changeset
   399
1
489c9b5090e2 Initial load
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parents:
diff changeset
   400
  // refer to the JVM book page 47 for description of steps
489c9b5090e2 Initial load
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parents:
diff changeset
   401
  // Step 1
489c9b5090e2 Initial load
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parents:
diff changeset
   402
  { ObjectLocker ol(this_oop, THREAD);
489c9b5090e2 Initial load
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parents:
diff changeset
   403
489c9b5090e2 Initial load
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parents:
diff changeset
   404
    Thread *self = THREAD; // it's passed the current thread
489c9b5090e2 Initial load
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parents:
diff changeset
   405
489c9b5090e2 Initial load
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parents:
diff changeset
   406
    // Step 2
489c9b5090e2 Initial load
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parents:
diff changeset
   407
    // If we were to use wait() instead of waitInterruptibly() then
489c9b5090e2 Initial load
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parents:
diff changeset
   408
    // we might end up throwing IE from link/symbol resolution sites
489c9b5090e2 Initial load
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parents:
diff changeset
   409
    // that aren't expected to throw.  This would wreak havoc.  See 6320309.
489c9b5090e2 Initial load
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parents:
diff changeset
   410
    while(this_oop->is_being_initialized() && !this_oop->is_reentrant_initialization(self)) {
5089
0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
fparain
parents: 4584
diff changeset
   411
        wait = true;
1
489c9b5090e2 Initial load
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parents:
diff changeset
   412
      ol.waitUninterruptibly(CHECK);
489c9b5090e2 Initial load
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parents:
diff changeset
   413
    }
489c9b5090e2 Initial load
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parents:
diff changeset
   414
489c9b5090e2 Initial load
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parents:
diff changeset
   415
    // Step 3
5089
0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
fparain
parents: 4584
diff changeset
   416
    if (this_oop->is_being_initialized() && this_oop->is_reentrant_initialization(self)) {
0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
fparain
parents: 4584
diff changeset
   417
      DTRACE_CLASSINIT_PROBE_WAIT(recursive, instanceKlass::cast(this_oop()), -1,wait);
1
489c9b5090e2 Initial load
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parents:
diff changeset
   418
      return;
5089
0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
fparain
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diff changeset
   419
    }
1
489c9b5090e2 Initial load
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parents:
diff changeset
   420
489c9b5090e2 Initial load
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parents:
diff changeset
   421
    // Step 4
5089
0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
fparain
parents: 4584
diff changeset
   422
    if (this_oop->is_initialized()) {
0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
fparain
parents: 4584
diff changeset
   423
      DTRACE_CLASSINIT_PROBE_WAIT(concurrent, instanceKlass::cast(this_oop()), -1,wait);
1
489c9b5090e2 Initial load
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parents:
diff changeset
   424
      return;
5089
0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
fparain
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diff changeset
   425
    }
1
489c9b5090e2 Initial load
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parents:
diff changeset
   426
489c9b5090e2 Initial load
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parents:
diff changeset
   427
    // Step 5
489c9b5090e2 Initial load
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parents:
diff changeset
   428
    if (this_oop->is_in_error_state()) {
5089
0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
fparain
parents: 4584
diff changeset
   429
      DTRACE_CLASSINIT_PROBE_WAIT(erroneous, instanceKlass::cast(this_oop()), -1,wait);
1
489c9b5090e2 Initial load
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parents:
diff changeset
   430
      ResourceMark rm(THREAD);
489c9b5090e2 Initial load
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parents:
diff changeset
   431
      const char* desc = "Could not initialize class ";
489c9b5090e2 Initial load
duke
parents:
diff changeset
   432
      const char* className = this_oop->external_name();
489c9b5090e2 Initial load
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parents:
diff changeset
   433
      size_t msglen = strlen(desc) + strlen(className) + 1;
6421
7c02a5af38e7 6980262: Memory leak when exception is thrown in static initializer
kamg
parents: 6248
diff changeset
   434
      char* message = NEW_RESOURCE_ARRAY(char, msglen);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
      if (NULL == message) {
489c9b5090e2 Initial load
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parents:
diff changeset
   436
        // Out of memory: can't create detailed error message
489c9b5090e2 Initial load
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parents:
diff changeset
   437
        THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   438
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
        jio_snprintf(message, msglen, "%s%s", desc, className);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
        THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message);
489c9b5090e2 Initial load
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parents:
diff changeset
   441
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
489c9b5090e2 Initial load
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parents:
diff changeset
   444
    // Step 6
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
    this_oop->set_init_state(being_initialized);
489c9b5090e2 Initial load
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parents:
diff changeset
   446
    this_oop->set_init_thread(self);
489c9b5090e2 Initial load
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parents:
diff changeset
   447
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
489c9b5090e2 Initial load
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parents:
diff changeset
   449
  // Step 7
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
  klassOop super_klass = this_oop->super();
489c9b5090e2 Initial load
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parents:
diff changeset
   451
  if (super_klass != NULL && !this_oop->is_interface() && Klass::cast(super_klass)->should_be_initialized()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   452
    Klass::cast(super_klass)->initialize(THREAD);
489c9b5090e2 Initial load
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parents:
diff changeset
   453
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
    if (HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   455
      Handle e(THREAD, PENDING_EXCEPTION);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
      CLEAR_PENDING_EXCEPTION;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
      {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
        EXCEPTION_MARK;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
        this_oop->set_initialization_state_and_notify(initialization_error, THREAD); // Locks object, set state, and notify all waiting threads
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
        CLEAR_PENDING_EXCEPTION;   // ignore any exception thrown, superclass initialization error is thrown below
489c9b5090e2 Initial load
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parents:
diff changeset
   461
      }
5089
0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
fparain
parents: 4584
diff changeset
   462
      DTRACE_CLASSINIT_PROBE_WAIT(super__failed, instanceKlass::cast(this_oop()), -1,wait);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
      THROW_OOP(e());
489c9b5090e2 Initial load
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parents:
diff changeset
   464
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
  // Step 8
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
    assert(THREAD->is_Java_thread(), "non-JavaThread in initialize_impl");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   470
    JavaThread* jt = (JavaThread*)THREAD;
5089
0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
fparain
parents: 4584
diff changeset
   471
    DTRACE_CLASSINIT_PROBE_WAIT(clinit, instanceKlass::cast(this_oop()), -1,wait);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   472
    // Timer includes any side effects of class initialization (resolution,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
    // etc), but not recursive entry into call_class_initializer().
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2343
diff changeset
   474
    PerfClassTraceTime timer(ClassLoader::perf_class_init_time(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2343
diff changeset
   475
                             ClassLoader::perf_class_init_selftime(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2343
diff changeset
   476
                             ClassLoader::perf_classes_inited(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2343
diff changeset
   477
                             jt->get_thread_stat()->perf_recursion_counts_addr(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2343
diff changeset
   478
                             jt->get_thread_stat()->perf_timers_addr(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2343
diff changeset
   479
                             PerfClassTraceTime::CLASS_CLINIT);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   480
    this_oop->call_class_initializer(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   481
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   482
489c9b5090e2 Initial load
duke
parents:
diff changeset
   483
  // Step 9
489c9b5090e2 Initial load
duke
parents:
diff changeset
   484
  if (!HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   485
    this_oop->set_initialization_state_and_notify(fully_initialized, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   486
    { ResourceMark rm(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   487
      debug_only(this_oop->vtable()->verify(tty, true);)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   488
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   489
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
  else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
    // Step 10 and 11
489c9b5090e2 Initial load
duke
parents:
diff changeset
   492
    Handle e(THREAD, PENDING_EXCEPTION);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   493
    CLEAR_PENDING_EXCEPTION;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   494
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
      EXCEPTION_MARK;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
      this_oop->set_initialization_state_and_notify(initialization_error, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   497
      CLEAR_PENDING_EXCEPTION;   // ignore any exception thrown, class initialization error is thrown below
489c9b5090e2 Initial load
duke
parents:
diff changeset
   498
    }
5089
0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
fparain
parents: 4584
diff changeset
   499
    DTRACE_CLASSINIT_PROBE_WAIT(error, instanceKlass::cast(this_oop()), -1,wait);
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4094
diff changeset
   500
    if (e->is_a(SystemDictionary::Error_klass())) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
      THROW_OOP(e());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
      JavaCallArguments args(e);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   504
      THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(),
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   505
                vmSymbols::throwable_void_signature(),
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
                &args);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
  }
5089
0cce506a0158 6935224: Adding new DTrace probes to work with Palantir
fparain
parents: 4584
diff changeset
   509
  DTRACE_CLASSINIT_PROBE_WAIT(end, instanceKlass::cast(this_oop()), -1,wait);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
// Note: implementation moved to static method to expose the this pointer.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
void instanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
  instanceKlassHandle kh(THREAD, this->as_klassOop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
  set_initialization_state_and_notify_impl(kh, state, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
void instanceKlass::set_initialization_state_and_notify_impl(instanceKlassHandle this_oop, ClassState state, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
  ObjectLocker ol(this_oop, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
  this_oop->set_init_state(state);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
  ol.notify_all(CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
void instanceKlass::add_implementor(klassOop k) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
  assert(Compile_lock->owned_by_self(), "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
  // Filter out my subinterfaces.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
  // (Note: Interfaces are never on the subklass list.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
  if (instanceKlass::cast(k)->is_interface()) return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
  // Filter out subclasses whose supers already implement me.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
  // (Note: CHA must walk subclasses of direct implementors
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
  // in order to locate indirect implementors.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
  klassOop sk = instanceKlass::cast(k)->super();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
  if (sk != NULL && instanceKlass::cast(sk)->implements_interface(as_klassOop()))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
    // We only need to check one immediate superclass, since the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
    // implements_interface query looks at transitive_interfaces.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
    // Any supers of the super have the same (or fewer) transitive_interfaces.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
  // Update number of implementors
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
  int i = _nof_implementors++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
  // Record this implementor, if there are not too many already
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
  if (i < implementors_limit) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
    assert(_implementors[i] == NULL, "should be exactly one implementor");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
    oop_store_without_check((oop*)&_implementors[i], k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
  } else if (i == implementors_limit) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
    // clear out the list on first overflow
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
    for (int i2 = 0; i2 < implementors_limit; i2++)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
      oop_store_without_check((oop*)&_implementors[i2], NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
489c9b5090e2 Initial load
duke
parents:
diff changeset
   554
  // The implementor also implements the transitive_interfaces
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
  for (int index = 0; index < local_interfaces()->length(); index++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
    instanceKlass::cast(klassOop(local_interfaces()->obj_at(index)))->add_implementor(k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
void instanceKlass::init_implementor() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
  for (int i = 0; i < implementors_limit; i++)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   562
    oop_store_without_check((oop*)&_implementors[i], NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
  _nof_implementors = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
489c9b5090e2 Initial load
duke
parents:
diff changeset
   567
void instanceKlass::process_interfaces(Thread *thread) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   568
  // link this class into the implementors list of every interface it implements
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
  KlassHandle this_as_oop (thread, this->as_klassOop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   570
  for (int i = local_interfaces()->length() - 1; i >= 0; i--) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
    assert(local_interfaces()->obj_at(i)->is_klass(), "must be a klass");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   572
    instanceKlass* interf = instanceKlass::cast(klassOop(local_interfaces()->obj_at(i)));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
    assert(interf->is_interface(), "expected interface");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
    interf->add_implementor(this_as_oop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   575
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   577
489c9b5090e2 Initial load
duke
parents:
diff changeset
   578
bool instanceKlass::can_be_primary_super_slow() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   579
  if (is_interface())
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
  else
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
    return Klass::can_be_primary_super_slow();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
objArrayOop instanceKlass::compute_secondary_supers(int num_extra_slots, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   586
  // The secondaries are the implemented interfaces.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
  instanceKlass* ik = instanceKlass::cast(as_klassOop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
  objArrayHandle interfaces (THREAD, ik->transitive_interfaces());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
  int num_secondaries = num_extra_slots + interfaces->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
  if (num_secondaries == 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
    return Universe::the_empty_system_obj_array();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   592
  } else if (num_extra_slots == 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
    return interfaces();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   595
    // a mix of both
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
    objArrayOop secondaries = oopFactory::new_system_objArray(num_secondaries, CHECK_NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
    for (int i = 0; i < interfaces->length(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   598
      secondaries->obj_at_put(num_extra_slots+i, interfaces->obj_at(i));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   599
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   600
    return secondaries;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   601
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   602
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   603
489c9b5090e2 Initial load
duke
parents:
diff changeset
   604
bool instanceKlass::compute_is_subtype_of(klassOop k) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
  if (Klass::cast(k)->is_interface()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   606
    return implements_interface(k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
    return Klass::compute_is_subtype_of(k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   610
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
bool instanceKlass::implements_interface(klassOop k) const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
  if (as_klassOop() == k) return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
  assert(Klass::cast(k)->is_interface(), "should be an interface class");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
  for (int i = 0; i < transitive_interfaces()->length(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   616
    if (transitive_interfaces()->obj_at(i) == k) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   617
      return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   618
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   619
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   620
  return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   622
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
objArrayOop instanceKlass::allocate_objArray(int n, int length, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
  if (length < 0) THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
  if (length > arrayOopDesc::max_array_length(T_OBJECT)) {
3576
4ceec8fb3e18 6850957: Honor -XX:OnOutOfMemoryError when array size exceeds VM limit
martin
parents: 3575
diff changeset
   626
    report_java_out_of_memory("Requested array size exceeds VM limit");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   627
    THROW_OOP_0(Universe::out_of_memory_error_array_size());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   629
  int size = objArrayOopDesc::object_size(length);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   630
  klassOop ak = array_klass(n, CHECK_NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   631
  KlassHandle h_ak (THREAD, ak);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   632
  objArrayOop o =
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
    (objArrayOop)CollectedHeap::array_allocate(h_ak, size, length, CHECK_NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   634
  return o;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   635
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
489c9b5090e2 Initial load
duke
parents:
diff changeset
   637
instanceOop instanceKlass::register_finalizer(instanceOop i, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   638
  if (TraceFinalizerRegistration) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
    tty->print("Registered ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   640
    i->print_value_on(tty);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
    tty->print_cr(" (" INTPTR_FORMAT ") as finalizable", (address)i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
  instanceHandle h_i(THREAD, i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   644
  // Pass the handle as argument, JavaCalls::call expects oop as jobjects
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
  JavaValue result(T_VOID);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   646
  JavaCallArguments args(h_i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   647
  methodHandle mh (THREAD, Universe::finalizer_register_method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   648
  JavaCalls::call(&result, mh, &args, CHECK_NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   649
  return h_i();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   650
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   651
489c9b5090e2 Initial load
duke
parents:
diff changeset
   652
instanceOop instanceKlass::allocate_instance(TRAPS) {
8725
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
   653
  assert(!oop_is_instanceMirror(), "wrong allocation path");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   654
  bool has_finalizer_flag = has_finalizer(); // Query before possible GC
489c9b5090e2 Initial load
duke
parents:
diff changeset
   655
  int size = size_helper();  // Query before forming handle.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   656
489c9b5090e2 Initial load
duke
parents:
diff changeset
   657
  KlassHandle h_k(THREAD, as_klassOop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   658
489c9b5090e2 Initial load
duke
parents:
diff changeset
   659
  instanceOop i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   660
489c9b5090e2 Initial load
duke
parents:
diff changeset
   661
  i = (instanceOop)CollectedHeap::obj_allocate(h_k, size, CHECK_NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   662
  if (has_finalizer_flag && !RegisterFinalizersAtInit) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   663
    i = register_finalizer(i, CHECK_NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   664
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   665
  return i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   666
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   667
489c9b5090e2 Initial load
duke
parents:
diff changeset
   668
instanceOop instanceKlass::allocate_permanent_instance(TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   669
  // Finalizer registration occurs in the Object.<init> constructor
489c9b5090e2 Initial load
duke
parents:
diff changeset
   670
  // and constructors normally aren't run when allocating perm
489c9b5090e2 Initial load
duke
parents:
diff changeset
   671
  // instances so simply disallow finalizable perm objects.  This can
489c9b5090e2 Initial load
duke
parents:
diff changeset
   672
  // be relaxed if a need for it is found.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   673
  assert(!has_finalizer(), "perm objects not allowed to have finalizers");
8725
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
   674
  assert(!oop_is_instanceMirror(), "wrong allocation path");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   675
  int size = size_helper();  // Query before forming handle.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   676
  KlassHandle h_k(THREAD, as_klassOop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   677
  instanceOop i = (instanceOop)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   678
    CollectedHeap::permanent_obj_allocate(h_k, size, CHECK_NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   679
  return i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   680
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   681
489c9b5090e2 Initial load
duke
parents:
diff changeset
   682
void instanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   683
  if (is_interface() || is_abstract()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   684
    ResourceMark rm(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   685
    THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError()
489c9b5090e2 Initial load
duke
parents:
diff changeset
   686
              : vmSymbols::java_lang_InstantiationException(), external_name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   687
  }
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4094
diff changeset
   688
  if (as_klassOop() == SystemDictionary::Class_klass()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   689
    ResourceMark rm(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   690
    THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError()
489c9b5090e2 Initial load
duke
parents:
diff changeset
   691
              : vmSymbols::java_lang_IllegalAccessException(), external_name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   692
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   693
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   694
489c9b5090e2 Initial load
duke
parents:
diff changeset
   695
klassOop instanceKlass::array_klass_impl(bool or_null, int n, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   696
  instanceKlassHandle this_oop(THREAD, as_klassOop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   697
  return array_klass_impl(this_oop, or_null, n, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   698
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   699
489c9b5090e2 Initial load
duke
parents:
diff changeset
   700
klassOop instanceKlass::array_klass_impl(instanceKlassHandle this_oop, bool or_null, int n, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   701
  if (this_oop->array_klasses() == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   702
    if (or_null) return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   703
489c9b5090e2 Initial load
duke
parents:
diff changeset
   704
    ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   705
    JavaThread *jt = (JavaThread *)THREAD;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   706
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   707
      // Atomic creation of array_klasses
489c9b5090e2 Initial load
duke
parents:
diff changeset
   708
      MutexLocker mc(Compile_lock, THREAD);   // for vtables
489c9b5090e2 Initial load
duke
parents:
diff changeset
   709
      MutexLocker ma(MultiArray_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   710
489c9b5090e2 Initial load
duke
parents:
diff changeset
   711
      // Check if update has already taken place
489c9b5090e2 Initial load
duke
parents:
diff changeset
   712
      if (this_oop->array_klasses() == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   713
        objArrayKlassKlass* oakk =
489c9b5090e2 Initial load
duke
parents:
diff changeset
   714
          (objArrayKlassKlass*)Universe::objArrayKlassKlassObj()->klass_part();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   715
489c9b5090e2 Initial load
duke
parents:
diff changeset
   716
        klassOop  k = oakk->allocate_objArray_klass(1, this_oop, CHECK_NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   717
        this_oop->set_array_klasses(k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   718
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   719
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   720
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   721
  // _this will always be set at this point
489c9b5090e2 Initial load
duke
parents:
diff changeset
   722
  objArrayKlass* oak = (objArrayKlass*)this_oop->array_klasses()->klass_part();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   723
  if (or_null) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   724
    return oak->array_klass_or_null(n);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   725
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   726
  return oak->array_klass(n, CHECK_NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   727
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   728
489c9b5090e2 Initial load
duke
parents:
diff changeset
   729
klassOop instanceKlass::array_klass_impl(bool or_null, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   730
  return array_klass_impl(or_null, 1, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   731
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   732
489c9b5090e2 Initial load
duke
parents:
diff changeset
   733
void instanceKlass::call_class_initializer(TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   734
  instanceKlassHandle ik (THREAD, as_klassOop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   735
  call_class_initializer_impl(ik, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   736
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   737
489c9b5090e2 Initial load
duke
parents:
diff changeset
   738
static int call_class_initializer_impl_counter = 0;   // for debugging
489c9b5090e2 Initial load
duke
parents:
diff changeset
   739
489c9b5090e2 Initial load
duke
parents:
diff changeset
   740
methodOop instanceKlass::class_initializer() {
8653
8797d788a4f1 6845426: non-static <clinit> method with no args is called during the class initialization process
kamg
parents: 8297
diff changeset
   741
  methodOop clinit = find_method(
8797d788a4f1 6845426: non-static <clinit> method with no args is called during the class initialization process
kamg
parents: 8297
diff changeset
   742
      vmSymbols::class_initializer_name(), vmSymbols::void_method_signature());
8797d788a4f1 6845426: non-static <clinit> method with no args is called during the class initialization process
kamg
parents: 8297
diff changeset
   743
  if (clinit != NULL && clinit->has_valid_initializer_flags()) {
8797d788a4f1 6845426: non-static <clinit> method with no args is called during the class initialization process
kamg
parents: 8297
diff changeset
   744
    return clinit;
8797d788a4f1 6845426: non-static <clinit> method with no args is called during the class initialization process
kamg
parents: 8297
diff changeset
   745
  }
8797d788a4f1 6845426: non-static <clinit> method with no args is called during the class initialization process
kamg
parents: 8297
diff changeset
   746
  return NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   747
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   748
489c9b5090e2 Initial load
duke
parents:
diff changeset
   749
void instanceKlass::call_class_initializer_impl(instanceKlassHandle this_oop, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   750
  methodHandle h_method(THREAD, this_oop->class_initializer());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   751
  assert(!this_oop->is_initialized(), "we cannot initialize twice");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   752
  if (TraceClassInitialization) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   753
    tty->print("%d Initializing ", call_class_initializer_impl_counter++);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   754
    this_oop->name()->print_value();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   755
    tty->print_cr("%s (" INTPTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", (address)this_oop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   756
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   757
  if (h_method() != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   758
    JavaCallArguments args; // No arguments
489c9b5090e2 Initial load
duke
parents:
diff changeset
   759
    JavaValue result(T_VOID);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   760
    JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   761
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   762
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   763
489c9b5090e2 Initial load
duke
parents:
diff changeset
   764
489c9b5090e2 Initial load
duke
parents:
diff changeset
   765
void instanceKlass::mask_for(methodHandle method, int bci,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   766
  InterpreterOopMap* entry_for) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   767
  // Dirty read, then double-check under a lock.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   768
  if (_oop_map_cache == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   769
    // Otherwise, allocate a new one.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   770
    MutexLocker x(OopMapCacheAlloc_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   771
    // First time use. Allocate a cache in C heap
489c9b5090e2 Initial load
duke
parents:
diff changeset
   772
    if (_oop_map_cache == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   773
      _oop_map_cache = new OopMapCache();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   774
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   775
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   776
  // _oop_map_cache is constant after init; lookup below does is own locking.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   777
  _oop_map_cache->lookup(method, bci, entry_for);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   778
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   779
489c9b5090e2 Initial load
duke
parents:
diff changeset
   780
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   781
bool instanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   782
  const int n = fields()->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   783
  for (int i = 0; i < n; i += next_offset ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   784
    int name_index = fields()->ushort_at(i + name_index_offset);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   785
    int sig_index  = fields()->ushort_at(i + signature_index_offset);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   786
    Symbol* f_name = constants()->symbol_at(name_index);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   787
    Symbol* f_sig  = constants()->symbol_at(sig_index);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   788
    if (f_name == name && f_sig == sig) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   789
      fd->initialize(as_klassOop(), i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   790
      return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   791
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   792
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   793
  return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   794
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   795
489c9b5090e2 Initial load
duke
parents:
diff changeset
   796
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   797
void instanceKlass::shared_symbols_iterate(SymbolClosure* closure) {
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   798
  Klass::shared_symbols_iterate(closure);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   799
  closure->do_symbol(&_generic_signature);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   800
  closure->do_symbol(&_source_file_name);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   801
  closure->do_symbol(&_source_debug_extension);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   802
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   803
  const int n = fields()->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   804
  for (int i = 0; i < n; i += next_offset ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   805
    int name_index = fields()->ushort_at(i + name_index_offset);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   806
    closure->do_symbol(constants()->symbol_at_addr(name_index));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   807
    int sig_index  = fields()->ushort_at(i + signature_index_offset);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   808
    closure->do_symbol(constants()->symbol_at_addr(sig_index));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   809
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   810
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   811
489c9b5090e2 Initial load
duke
parents:
diff changeset
   812
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   813
klassOop instanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   814
  const int n = local_interfaces()->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   815
  for (int i = 0; i < n; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   816
    klassOop intf1 = klassOop(local_interfaces()->obj_at(i));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   817
    assert(Klass::cast(intf1)->is_interface(), "just checking type");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   818
    // search for field in current interface
489c9b5090e2 Initial load
duke
parents:
diff changeset
   819
    if (instanceKlass::cast(intf1)->find_local_field(name, sig, fd)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   820
      assert(fd->is_static(), "interface field must be static");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   821
      return intf1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   822
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   823
    // search for field in direct superinterfaces
489c9b5090e2 Initial load
duke
parents:
diff changeset
   824
    klassOop intf2 = instanceKlass::cast(intf1)->find_interface_field(name, sig, fd);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   825
    if (intf2 != NULL) return intf2;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   826
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   827
  // otherwise field lookup fails
489c9b5090e2 Initial load
duke
parents:
diff changeset
   828
  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   829
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   830
489c9b5090e2 Initial load
duke
parents:
diff changeset
   831
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   832
klassOop instanceKlass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   833
  // search order according to newest JVM spec (5.4.3.2, p.167).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   834
  // 1) search for field in current klass
489c9b5090e2 Initial load
duke
parents:
diff changeset
   835
  if (find_local_field(name, sig, fd)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   836
    return as_klassOop();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   837
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   838
  // 2) search for field recursively in direct superinterfaces
489c9b5090e2 Initial load
duke
parents:
diff changeset
   839
  { klassOop intf = find_interface_field(name, sig, fd);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   840
    if (intf != NULL) return intf;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   841
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   842
  // 3) apply field lookup recursively if superclass exists
489c9b5090e2 Initial load
duke
parents:
diff changeset
   843
  { klassOop supr = super();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   844
    if (supr != NULL) return instanceKlass::cast(supr)->find_field(name, sig, fd);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   845
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   846
  // 4) otherwise field lookup fails
489c9b5090e2 Initial load
duke
parents:
diff changeset
   847
  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   848
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   849
489c9b5090e2 Initial load
duke
parents:
diff changeset
   850
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   851
klassOop instanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   852
  // search order according to newest JVM spec (5.4.3.2, p.167).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   853
  // 1) search for field in current klass
489c9b5090e2 Initial load
duke
parents:
diff changeset
   854
  if (find_local_field(name, sig, fd)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   855
    if (fd->is_static() == is_static) return as_klassOop();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   856
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   857
  // 2) search for field recursively in direct superinterfaces
489c9b5090e2 Initial load
duke
parents:
diff changeset
   858
  if (is_static) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   859
    klassOop intf = find_interface_field(name, sig, fd);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   860
    if (intf != NULL) return intf;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   861
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   862
  // 3) apply field lookup recursively if superclass exists
489c9b5090e2 Initial load
duke
parents:
diff changeset
   863
  { klassOop supr = super();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   864
    if (supr != NULL) return instanceKlass::cast(supr)->find_field(name, sig, is_static, fd);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   865
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   866
  // 4) otherwise field lookup fails
489c9b5090e2 Initial load
duke
parents:
diff changeset
   867
  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   868
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   869
489c9b5090e2 Initial load
duke
parents:
diff changeset
   870
489c9b5090e2 Initial load
duke
parents:
diff changeset
   871
bool instanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   872
  int length = fields()->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   873
  for (int i = 0; i < length; i += next_offset) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   874
    if (offset_from_fields( i ) == offset) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   875
      fd->initialize(as_klassOop(), i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   876
      if (fd->is_static() == is_static) return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   877
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   878
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   879
  return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   880
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   881
489c9b5090e2 Initial load
duke
parents:
diff changeset
   882
489c9b5090e2 Initial load
duke
parents:
diff changeset
   883
bool instanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   884
  klassOop klass = as_klassOop();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   885
  while (klass != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   886
    if (instanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   887
      return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   888
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   889
    klass = Klass::cast(klass)->super();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   890
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   891
  return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   892
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   893
489c9b5090e2 Initial load
duke
parents:
diff changeset
   894
489c9b5090e2 Initial load
duke
parents:
diff changeset
   895
void instanceKlass::methods_do(void f(methodOop method)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   896
  int len = methods()->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   897
  for (int index = 0; index < len; index++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   898
    methodOop m = methodOop(methods()->obj_at(index));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   899
    assert(m->is_method(), "must be method");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   900
    f(m);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   901
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   902
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   903
8725
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
   904
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   905
void instanceKlass::do_local_static_fields(FieldClosure* cl) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   906
  fieldDescriptor fd;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   907
  int length = fields()->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   908
  for (int i = 0; i < length; i += next_offset) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   909
    fd.initialize(as_klassOop(), i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   910
    if (fd.is_static()) cl->do_field(&fd);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   911
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   912
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   913
489c9b5090e2 Initial load
duke
parents:
diff changeset
   914
489c9b5090e2 Initial load
duke
parents:
diff changeset
   915
void instanceKlass::do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   916
  instanceKlassHandle h_this(THREAD, as_klassOop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   917
  do_local_static_fields_impl(h_this, f, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   918
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   919
489c9b5090e2 Initial load
duke
parents:
diff changeset
   920
489c9b5090e2 Initial load
duke
parents:
diff changeset
   921
void instanceKlass::do_local_static_fields_impl(instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   922
  fieldDescriptor fd;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   923
  int length = this_oop->fields()->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   924
  for (int i = 0; i < length; i += next_offset) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   925
    fd.initialize(this_oop(), i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   926
    if (fd.is_static()) { f(&fd, CHECK); } // Do NOT remove {}! (CHECK macro expands into several statements)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   927
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   928
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   929
489c9b5090e2 Initial load
duke
parents:
diff changeset
   930
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   931
static int compare_fields_by_offset(int* a, int* b) {
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   932
  return a[0] - b[0];
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   933
}
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   934
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   935
void instanceKlass::do_nonstatic_fields(FieldClosure* cl) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   936
  instanceKlass* super = superklass();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   937
  if (super != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   938
    super->do_nonstatic_fields(cl);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   939
  }
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   940
  fieldDescriptor fd;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   941
  int length = fields()->length();
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   942
  // In DebugInfo nonstatic fields are sorted by offset.
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   943
  int* fields_sorted = NEW_C_HEAP_ARRAY(int, 2*(length+1));
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   944
  int j = 0;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   945
  for (int i = 0; i < length; i += next_offset) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   946
    fd.initialize(as_klassOop(), i);
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   947
    if (!fd.is_static()) {
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   948
      fields_sorted[j + 0] = fd.offset();
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   949
      fields_sorted[j + 1] = i;
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   950
      j += 2;
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   951
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   952
  }
217
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   953
  if (j > 0) {
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   954
    length = j;
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   955
    // _sort_Fn is defined in growableArray.hpp.
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   956
    qsort(fields_sorted, length/2, 2*sizeof(int), (_sort_Fn)compare_fields_by_offset);
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   957
    for (int i = 0; i < length; i += 2) {
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   958
      fd.initialize(as_klassOop(), fields_sorted[i + 1]);
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   959
      assert(!fd.is_static() && fd.offset() == fields_sorted[i], "only nonstatic fields");
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   960
      cl->do_field(&fd);
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   961
    }
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   962
  }
c646ef2f5d58 6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
kvn
parents: 1
diff changeset
   963
  FREE_C_HEAP_ARRAY(int, fields_sorted);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   964
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   965
489c9b5090e2 Initial load
duke
parents:
diff changeset
   966
489c9b5090e2 Initial load
duke
parents:
diff changeset
   967
void instanceKlass::array_klasses_do(void f(klassOop k)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   968
  if (array_klasses() != NULL)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   969
    arrayKlass::cast(array_klasses())->array_klasses_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   970
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   971
489c9b5090e2 Initial load
duke
parents:
diff changeset
   972
489c9b5090e2 Initial load
duke
parents:
diff changeset
   973
void instanceKlass::with_array_klasses_do(void f(klassOop k)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   974
  f(as_klassOop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   975
  array_klasses_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   976
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   977
489c9b5090e2 Initial load
duke
parents:
diff changeset
   978
#ifdef ASSERT
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   979
static int linear_search(objArrayOop methods, Symbol* name, Symbol* signature) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   980
  int len = methods->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   981
  for (int index = 0; index < len; index++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   982
    methodOop m = (methodOop)(methods->obj_at(index));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   983
    assert(m->is_method(), "must be method");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   984
    if (m->signature() == signature && m->name() == name) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   985
       return index;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   986
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   987
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   988
  return -1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   989
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   990
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   991
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   992
methodOop instanceKlass::find_method(Symbol* name, Symbol* signature) const {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   993
  return instanceKlass::find_method(methods(), name, signature);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   994
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   995
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
   996
methodOop instanceKlass::find_method(objArrayOop methods, Symbol* name, Symbol* signature) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   997
  int len = methods->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   998
  // methods are sorted, so do binary search
489c9b5090e2 Initial load
duke
parents:
diff changeset
   999
  int l = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1000
  int h = len - 1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1001
  while (l <= h) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1002
    int mid = (l + h) >> 1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1003
    methodOop m = (methodOop)methods->obj_at(mid);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1004
    assert(m->is_method(), "must be method");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1005
    int res = m->name()->fast_compare(name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1006
    if (res == 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1007
      // found matching name; do linear search to find matching signature
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1008
      // first, quick check for common case
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1009
      if (m->signature() == signature) return m;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1010
      // search downwards through overloaded methods
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1011
      int i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1012
      for (i = mid - 1; i >= l; i--) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1013
        methodOop m = (methodOop)methods->obj_at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1014
        assert(m->is_method(), "must be method");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1015
        if (m->name() != name) break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1016
        if (m->signature() == signature) return m;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1017
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1018
      // search upwards
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1019
      for (i = mid + 1; i <= h; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1020
        methodOop m = (methodOop)methods->obj_at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1021
        assert(m->is_method(), "must be method");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1022
        if (m->name() != name) break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1023
        if (m->signature() == signature) return m;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1024
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1025
      // not found
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1026
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1027
      int index = linear_search(methods, name, signature);
5403
6b0dd9c75dde 6888954: argument formatting for assert() and friends
jcoomes
parents: 5089
diff changeset
  1028
      assert(index == -1, err_msg("binary search should have found entry %d", index));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1029
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1030
      return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1031
    } else if (res < 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1032
      l = mid + 1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1033
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1034
      h = mid - 1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1035
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1036
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1037
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1038
  int index = linear_search(methods, name, signature);
5403
6b0dd9c75dde 6888954: argument formatting for assert() and friends
jcoomes
parents: 5089
diff changeset
  1039
  assert(index == -1, err_msg("binary search should have found entry %d", index));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1040
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1041
  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1042
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1043
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1044
methodOop instanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1045
  klassOop klass = as_klassOop();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1046
  while (klass != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1047
    methodOop method = instanceKlass::cast(klass)->find_method(name, signature);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1048
    if (method != NULL) return method;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1049
    klass = instanceKlass::cast(klass)->super();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1050
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1051
  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1052
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1053
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1054
// lookup a method in all the interfaces that this class implements
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1055
methodOop instanceKlass::lookup_method_in_all_interfaces(Symbol* name,
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1056
                                                         Symbol* signature) const {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1057
  objArrayOop all_ifs = instanceKlass::cast(as_klassOop())->transitive_interfaces();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1058
  int num_ifs = all_ifs->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1059
  instanceKlass *ik = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1060
  for (int i = 0; i < num_ifs; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1061
    ik = instanceKlass::cast(klassOop(all_ifs->obj_at(i)));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1062
    methodOop m = ik->lookup_method(name, signature);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1063
    if (m != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1064
      return m;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1065
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1066
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1067
  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1068
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1069
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1070
/* jni_id_for_impl for jfieldIds only */
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1071
JNIid* instanceKlass::jni_id_for_impl(instanceKlassHandle this_oop, int offset) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1072
  MutexLocker ml(JfieldIdCreation_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1073
  // Retry lookup after we got the lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1074
  JNIid* probe = this_oop->jni_ids() == NULL ? NULL : this_oop->jni_ids()->find(offset);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1075
  if (probe == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1076
    // Slow case, allocate new static field identifier
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1077
    probe = new JNIid(this_oop->as_klassOop(), offset, this_oop->jni_ids());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1078
    this_oop->set_jni_ids(probe);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1079
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1080
  return probe;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1081
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1082
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1083
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1084
/* jni_id_for for jfieldIds only */
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1085
JNIid* instanceKlass::jni_id_for(int offset) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1086
  JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1087
  if (probe == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1088
    probe = jni_id_for_impl(this->as_klassOop(), offset);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1089
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1090
  return probe;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1091
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1092
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1093
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1094
// Lookup or create a jmethodID.
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1095
// This code is called by the VMThread and JavaThreads so the
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1096
// locking has to be done very carefully to avoid deadlocks
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1097
// and/or other cache consistency problems.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1098
//
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1099
jmethodID instanceKlass::get_jmethod_id(instanceKlassHandle ik_h, methodHandle method_h) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1100
  size_t idnum = (size_t)method_h->method_idnum();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1101
  jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1102
  size_t length = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1103
  jmethodID id = NULL;
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1104
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1105
  // We use a double-check locking idiom here because this cache is
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1106
  // performance sensitive. In the normal system, this cache only
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1107
  // transitions from NULL to non-NULL which is safe because we use
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1108
  // release_set_methods_jmethod_ids() to advertise the new cache.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1109
  // A partially constructed cache should never be seen by a racing
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1110
  // thread. We also use release_store_ptr() to save a new jmethodID
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1111
  // in the cache so a partially constructed jmethodID should never be
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1112
  // seen either. Cache reads of existing jmethodIDs proceed without a
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1113
  // lock, but cache writes of a new jmethodID requires uniqueness and
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1114
  // creation of the cache itself requires no leaks so a lock is
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1115
  // generally acquired in those two cases.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1116
  //
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1117
  // If the RedefineClasses() API has been used, then this cache can
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1118
  // grow and we'll have transitions from non-NULL to bigger non-NULL.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1119
  // Cache creation requires no leaks and we require safety between all
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1120
  // cache accesses and freeing of the old cache so a lock is generally
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1121
  // acquired when the RedefineClasses() API has been used.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1122
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1123
  if (jmeths != NULL) {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1124
    // the cache already exists
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1125
    if (!ik_h->idnum_can_increment()) {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1126
      // the cache can't grow so we can just get the current values
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1127
      get_jmethod_id_length_value(jmeths, idnum, &length, &id);
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1128
    } else {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1129
      // cache can grow so we have to be more careful
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1130
      if (Threads::number_of_threads() == 0 ||
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1131
          SafepointSynchronize::is_at_safepoint()) {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1132
        // we're single threaded or at a safepoint - no locking needed
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1133
        get_jmethod_id_length_value(jmeths, idnum, &length, &id);
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1134
      } else {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1135
        MutexLocker ml(JmethodIdCreation_lock);
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1136
        get_jmethod_id_length_value(jmeths, idnum, &length, &id);
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1137
      }
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1138
    }
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1139
  }
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1140
  // implied else:
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1141
  // we need to allocate a cache so default length and id values are good
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1142
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1143
  if (jmeths == NULL ||   // no cache yet
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1144
      length <= idnum ||  // cache is too short
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1145
      id == NULL) {       // cache doesn't contain entry
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1146
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1147
    // This function can be called by the VMThread so we have to do all
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1148
    // things that might block on a safepoint before grabbing the lock.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1149
    // Otherwise, we can deadlock with the VMThread or have a cache
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1150
    // consistency issue. These vars keep track of what we might have
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1151
    // to free after the lock is dropped.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1152
    jmethodID  to_dealloc_id     = NULL;
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1153
    jmethodID* to_dealloc_jmeths = NULL;
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1154
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1155
    // may not allocate new_jmeths or use it if we allocate it
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1156
    jmethodID* new_jmeths = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1157
    if (length <= idnum) {
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1158
      // allocate a new cache that might be used
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1159
      size_t size = MAX2(idnum+1, (size_t)ik_h->idnum_allocated_count());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1160
      new_jmeths = NEW_C_HEAP_ARRAY(jmethodID, size+1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1161
      memset(new_jmeths, 0, (size+1)*sizeof(jmethodID));
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1162
      // cache size is stored in element[0], other elements offset by one
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1163
      new_jmeths[0] = (jmethodID)size;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1164
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1165
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1166
    // allocate a new jmethodID that might be used
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1167
    jmethodID new_id = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1168
    if (method_h->is_old() && !method_h->is_obsolete()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1169
      // The method passed in is old (but not obsolete), we need to use the current version
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1170
      methodOop current_method = ik_h->method_with_idnum((int)idnum);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1171
      assert(current_method != NULL, "old and but not obsolete, so should exist");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1172
      methodHandle current_method_h(current_method == NULL? method_h() : current_method);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1173
      new_id = JNIHandles::make_jmethod_id(current_method_h);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1174
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1175
      // It is the current version of the method or an obsolete method,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1176
      // use the version passed in
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1177
      new_id = JNIHandles::make_jmethod_id(method_h);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1178
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1179
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1180
    if (Threads::number_of_threads() == 0 ||
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1181
        SafepointSynchronize::is_at_safepoint()) {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1182
      // we're single threaded or at a safepoint - no locking needed
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1183
      id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths,
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1184
                                          &to_dealloc_id, &to_dealloc_jmeths);
222
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1185
    } else {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1186
      MutexLocker ml(JmethodIdCreation_lock);
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1187
      id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths,
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1188
                                          &to_dealloc_id, &to_dealloc_jmeths);
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1189
    }
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1190
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1191
    // The lock has been dropped so we can free resources.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1192
    // Free up either the old cache or the new cache if we allocated one.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1193
    if (to_dealloc_jmeths != NULL) {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1194
      FreeHeap(to_dealloc_jmeths);
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1195
    }
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1196
    // free up the new ID since it wasn't needed
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1197
    if (to_dealloc_id != NULL) {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1198
      JNIHandles::destroy_jmethod_id(to_dealloc_id);
222
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1199
    }
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1200
  }
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1201
  return id;
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1202
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1203
222
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1204
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1205
// Common code to fetch the jmethodID from the cache or update the
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1206
// cache with the new jmethodID. This function should never do anything
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1207
// that causes the caller to go to a safepoint or we can deadlock with
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1208
// the VMThread or have cache consistency issues.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1209
//
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1210
jmethodID instanceKlass::get_jmethod_id_fetch_or_update(
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1211
            instanceKlassHandle ik_h, size_t idnum, jmethodID new_id,
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1212
            jmethodID* new_jmeths, jmethodID* to_dealloc_id_p,
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1213
            jmethodID** to_dealloc_jmeths_p) {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1214
  assert(new_id != NULL, "sanity check");
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1215
  assert(to_dealloc_id_p != NULL, "sanity check");
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1216
  assert(to_dealloc_jmeths_p != NULL, "sanity check");
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1217
  assert(Threads::number_of_threads() == 0 ||
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1218
         SafepointSynchronize::is_at_safepoint() ||
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1219
         JmethodIdCreation_lock->owned_by_self(), "sanity check");
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1220
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1221
  // reacquire the cache - we are locked, single threaded or at a safepoint
222
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1222
  jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire();
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1223
  jmethodID  id     = NULL;
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1224
  size_t     length = 0;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1225
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1226
  if (jmeths == NULL ||                         // no cache yet
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1227
      (length = (size_t)jmeths[0]) <= idnum) {  // cache is too short
222
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1228
    if (jmeths != NULL) {
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1229
      // copy any existing entries from the old cache
222
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1230
      for (size_t index = 0; index < length; index++) {
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1231
        new_jmeths[index+1] = jmeths[index+1];
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1232
      }
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1233
      *to_dealloc_jmeths_p = jmeths;  // save old cache for later delete
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1234
    }
222
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1235
    ik_h->release_set_methods_jmethod_ids(jmeths = new_jmeths);
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1236
  } else {
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1237
    // fetch jmethodID (if any) from the existing cache
222
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1238
    id = jmeths[idnum+1];
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1239
    *to_dealloc_jmeths_p = new_jmeths;  // save new cache for later delete
222
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1240
  }
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1241
  if (id == NULL) {
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1242
    // No matching jmethodID in the existing cache or we have a new
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1243
    // cache or we just grew the cache. This cache write is done here
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1244
    // by the first thread to win the foot race because a jmethodID
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1245
    // needs to be unique once it is generally available.
222
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1246
    id = new_id;
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1247
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1248
    // The jmethodID cache can be read while unlocked so we have to
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1249
    // make sure the new jmethodID is complete before installing it
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1250
    // in the cache.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1251
    OrderAccess::release_store_ptr(&jmeths[idnum+1], id);
222
3d1795325749 6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents: 220
diff changeset
  1252
  } else {
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1253
    *to_dealloc_id_p = new_id; // save new id for later delete
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1254
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1255
  return id;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1256
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1257
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1258
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1259
// Common code to get the jmethodID cache length and the jmethodID
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1260
// value at index idnum if there is one.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1261
//
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1262
void instanceKlass::get_jmethod_id_length_value(jmethodID* cache,
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1263
       size_t idnum, size_t *length_p, jmethodID* id_p) {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1264
  assert(cache != NULL, "sanity check");
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1265
  assert(length_p != NULL, "sanity check");
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1266
  assert(id_p != NULL, "sanity check");
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1267
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1268
  // cache size is stored in element[0], other elements offset by one
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1269
  *length_p = (size_t)cache[0];
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1270
  if (*length_p <= idnum) {  // cache is too short
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1271
    *id_p = NULL;
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1272
  } else {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1273
    *id_p = cache[idnum+1];  // fetch jmethodID (if any)
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1274
  }
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1275
}
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1276
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1277
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1278
// Lookup a jmethodID, NULL if not found.  Do no blocking, no allocations, no handles
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1279
jmethodID instanceKlass::jmethod_id_or_null(methodOop method) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1280
  size_t idnum = (size_t)method->method_idnum();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1281
  jmethodID* jmeths = methods_jmethod_ids_acquire();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1282
  size_t length;                                // length assigned as debugging crumb
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1283
  jmethodID id = NULL;
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1284
  if (jmeths != NULL &&                         // If there is a cache
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1285
      (length = (size_t)jmeths[0]) > idnum) {   // and if it is long enough,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1286
    id = jmeths[idnum+1];                       // Look up the id (may be NULL)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1287
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1288
  return id;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1289
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1290
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1291
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1292
// Cache an itable index
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1293
void instanceKlass::set_cached_itable_index(size_t idnum, int index) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1294
  int* indices = methods_cached_itable_indices_acquire();
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1295
  int* to_dealloc_indices = NULL;
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1296
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1297
  // We use a double-check locking idiom here because this cache is
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1298
  // performance sensitive. In the normal system, this cache only
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1299
  // transitions from NULL to non-NULL which is safe because we use
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1300
  // release_set_methods_cached_itable_indices() to advertise the
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1301
  // new cache. A partially constructed cache should never be seen
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1302
  // by a racing thread. Cache reads and writes proceed without a
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1303
  // lock, but creation of the cache itself requires no leaks so a
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1304
  // lock is generally acquired in that case.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1305
  //
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1306
  // If the RedefineClasses() API has been used, then this cache can
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1307
  // grow and we'll have transitions from non-NULL to bigger non-NULL.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1308
  // Cache creation requires no leaks and we require safety between all
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1309
  // cache accesses and freeing of the old cache so a lock is generally
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1310
  // acquired when the RedefineClasses() API has been used.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1311
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1312
  if (indices == NULL || idnum_can_increment()) {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1313
    // we need a cache or the cache can grow
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1314
    MutexLocker ml(JNICachedItableIndex_lock);
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1315
    // reacquire the cache to see if another thread already did the work
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1316
    indices = methods_cached_itable_indices_acquire();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1317
    size_t length = 0;
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1318
    // cache size is stored in element[0], other elements offset by one
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1319
    if (indices == NULL || (length = (size_t)indices[0]) <= idnum) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1320
      size_t size = MAX2(idnum+1, (size_t)idnum_allocated_count());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1321
      int* new_indices = NEW_C_HEAP_ARRAY(int, size+1);
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1322
      new_indices[0] = (int)size;
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1323
      // copy any existing entries
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1324
      size_t i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1325
      for (i = 0; i < length; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1326
        new_indices[i+1] = indices[i+1];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1327
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1328
      // Set all the rest to -1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1329
      for (i = length; i < size; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1330
        new_indices[i+1] = -1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1331
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1332
      if (indices != NULL) {
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1333
        // We have an old cache to delete so save it for after we
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1334
        // drop the lock.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1335
        to_dealloc_indices = indices;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1336
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1337
      release_set_methods_cached_itable_indices(indices = new_indices);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1338
    }
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1339
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1340
    if (idnum_can_increment()) {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1341
      // this cache can grow so we have to write to it safely
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1342
      indices[idnum+1] = index;
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1343
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1344
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1345
    CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1346
  }
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1347
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1348
  if (!idnum_can_increment()) {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1349
    // The cache cannot grow and this JNI itable index value does not
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1350
    // have to be unique like a jmethodID. If there is a race to set it,
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1351
    // it doesn't matter.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1352
    indices[idnum+1] = index;
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1353
  }
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1354
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1355
  if (to_dealloc_indices != NULL) {
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1356
    // we allocated a new cache so free the old one
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1357
    FreeHeap(to_dealloc_indices);
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  1358
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1359
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1360
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1361
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1362
// Retrieve a cached itable index
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1363
int instanceKlass::cached_itable_index(size_t idnum) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1364
  int* indices = methods_cached_itable_indices_acquire();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1365
  if (indices != NULL && ((size_t)indices[0]) > idnum) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1366
     // indices exist and are long enough, retrieve possible cached
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1367
    return indices[idnum+1];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1368
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1369
  return -1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1370
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1371
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1372
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1373
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1374
// nmethodBucket is used to record dependent nmethods for
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1375
// deoptimization.  nmethod dependencies are actually <klass, method>
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1376
// pairs but we really only care about the klass part for purposes of
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1377
// finding nmethods which might need to be deoptimized.  Instead of
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1378
// recording the method, a count of how many times a particular nmethod
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1379
// was recorded is kept.  This ensures that any recording errors are
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1380
// noticed since an nmethod should be removed as many times are it's
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1381
// added.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1382
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1383
class nmethodBucket {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1384
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1385
  nmethod*       _nmethod;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1386
  int            _count;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1387
  nmethodBucket* _next;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1388
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1389
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1390
  nmethodBucket(nmethod* nmethod, nmethodBucket* next) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1391
    _nmethod = nmethod;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1392
    _next = next;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1393
    _count = 1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1394
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1395
  int count()                             { return _count; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1396
  int increment()                         { _count += 1; return _count; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1397
  int decrement()                         { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1398
  nmethodBucket* next()                   { return _next; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1399
  void set_next(nmethodBucket* b)         { _next = b; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1400
  nmethod* get_nmethod()                  { return _nmethod; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1401
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1402
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1403
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1404
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1405
// Walk the list of dependent nmethods searching for nmethods which
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1406
// are dependent on the klassOop that was passed in and mark them for
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1407
// deoptimization.  Returns the number of nmethods found.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1408
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1409
int instanceKlass::mark_dependent_nmethods(DepChange& changes) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1410
  assert_locked_or_safepoint(CodeCache_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1411
  int found = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1412
  nmethodBucket* b = _dependencies;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1413
  while (b != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1414
    nmethod* nm = b->get_nmethod();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1415
    // since dependencies aren't removed until an nmethod becomes a zombie,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1416
    // the dependency list may contain nmethods which aren't alive.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1417
    if (nm->is_alive() && !nm->is_marked_for_deoptimization() && nm->check_dependency_on(changes)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1418
      if (TraceDependencies) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1419
        ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1420
        tty->print_cr("Marked for deoptimization");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1421
        tty->print_cr("  context = %s", this->external_name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1422
        changes.print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1423
        nm->print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1424
        nm->print_dependencies();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1425
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1426
      nm->mark_for_deoptimization();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1427
      found++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1428
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1429
    b = b->next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1430
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1431
  return found;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1432
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1433
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1434
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1435
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1436
// Add an nmethodBucket to the list of dependencies for this nmethod.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1437
// It's possible that an nmethod has multiple dependencies on this klass
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1438
// so a count is kept for each bucket to guarantee that creation and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1439
// deletion of dependencies is consistent.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1440
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1441
void instanceKlass::add_dependent_nmethod(nmethod* nm) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1442
  assert_locked_or_safepoint(CodeCache_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1443
  nmethodBucket* b = _dependencies;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1444
  nmethodBucket* last = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1445
  while (b != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1446
    if (nm == b->get_nmethod()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1447
      b->increment();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1448
      return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1449
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1450
    b = b->next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1451
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1452
  _dependencies = new nmethodBucket(nm, _dependencies);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1453
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1454
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1455
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1456
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1457
// Decrement count of the nmethod in the dependency list and remove
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1458
// the bucket competely when the count goes to 0.  This method must
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1459
// find a corresponding bucket otherwise there's a bug in the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1460
// recording of dependecies.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1461
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1462
void instanceKlass::remove_dependent_nmethod(nmethod* nm) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1463
  assert_locked_or_safepoint(CodeCache_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1464
  nmethodBucket* b = _dependencies;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1465
  nmethodBucket* last = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1466
  while (b != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1467
    if (nm == b->get_nmethod()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1468
      if (b->decrement() == 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1469
        if (last == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1470
          _dependencies = b->next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1471
        } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1472
          last->set_next(b->next());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1473
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1474
        delete b;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1475
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1476
      return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1477
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1478
    last = b;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1479
    b = b->next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1480
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1481
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1482
  tty->print_cr("### %s can't find dependent nmethod:", this->external_name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1483
  nm->print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1484
#endif // ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1485
  ShouldNotReachHere();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1486
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1487
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1488
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1489
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1490
void instanceKlass::print_dependent_nmethods(bool verbose) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1491
  nmethodBucket* b = _dependencies;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1492
  int idx = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1493
  while (b != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1494
    nmethod* nm = b->get_nmethod();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1495
    tty->print("[%d] count=%d { ", idx++, b->count());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1496
    if (!verbose) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1497
      nm->print_on(tty, "nmethod");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1498
      tty->print_cr(" } ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1499
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1500
      nm->print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1501
      nm->print_dependencies();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1502
      tty->print_cr("--- } ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1503
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1504
    b = b->next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1505
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1506
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1507
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1508
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1509
bool instanceKlass::is_dependent_nmethod(nmethod* nm) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1510
  nmethodBucket* b = _dependencies;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1511
  while (b != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1512
    if (nm == b->get_nmethod()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1513
      return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1514
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1515
    b = b->next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1516
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1517
  return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1518
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1519
#endif //PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1520
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1521
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1522
#ifdef ASSERT
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1523
template <class T> void assert_is_in(T *p) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1524
  T heap_oop = oopDesc::load_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1525
  if (!oopDesc::is_null(heap_oop)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1526
    oop o = oopDesc::decode_heap_oop_not_null(heap_oop);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1527
    assert(Universe::heap()->is_in(o), "should be in heap");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1528
  }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1529
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1530
template <class T> void assert_is_in_closed_subset(T *p) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1531
  T heap_oop = oopDesc::load_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1532
  if (!oopDesc::is_null(heap_oop)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1533
    oop o = oopDesc::decode_heap_oop_not_null(heap_oop);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1534
    assert(Universe::heap()->is_in_closed_subset(o), "should be in closed");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1535
  }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1536
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1537
template <class T> void assert_is_in_reserved(T *p) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1538
  T heap_oop = oopDesc::load_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1539
  if (!oopDesc::is_null(heap_oop)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1540
    oop o = oopDesc::decode_heap_oop_not_null(heap_oop);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1541
    assert(Universe::heap()->is_in_reserved(o), "should be in reserved");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1542
  }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1543
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1544
template <class T> void assert_nothing(T *p) {}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1545
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1546
#else
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1547
template <class T> void assert_is_in(T *p) {}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1548
template <class T> void assert_is_in_closed_subset(T *p) {}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1549
template <class T> void assert_is_in_reserved(T *p) {}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1550
template <class T> void assert_nothing(T *p) {}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1551
#endif // ASSERT
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1552
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1553
//
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1554
// Macros that iterate over areas of oops which are specialized on type of
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1555
// oop pointer either narrow or wide, depending on UseCompressedOops
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1556
//
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1557
// Parameters are:
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1558
//   T         - type of oop to point to (either oop or narrowOop)
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1559
//   start_p   - starting pointer for region to iterate over
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1560
//   count     - number of oops or narrowOops to iterate over
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1561
//   do_oop    - action to perform on each oop (it's arbitrary C code which
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1562
//               makes it more efficient to put in a macro rather than making
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1563
//               it a template function)
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1564
//   assert_fn - assert function which is template function because performance
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1565
//               doesn't matter when enabled.
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1566
#define InstanceKlass_SPECIALIZED_OOP_ITERATE( \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1567
  T, start_p, count, do_oop,                \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1568
  assert_fn)                                \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1569
{                                           \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1570
  T* p         = (T*)(start_p);             \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1571
  T* const end = p + (count);               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1572
  while (p < end) {                         \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1573
    (assert_fn)(p);                         \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1574
    do_oop;                                 \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1575
    ++p;                                    \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1576
  }                                         \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1577
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1578
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1579
#define InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE( \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1580
  T, start_p, count, do_oop,                \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1581
  assert_fn)                                \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1582
{                                           \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1583
  T* const start = (T*)(start_p);           \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1584
  T*       p     = start + (count);         \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1585
  while (start < p) {                       \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1586
    --p;                                    \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1587
    (assert_fn)(p);                         \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1588
    do_oop;                                 \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1589
  }                                         \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1590
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1591
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1592
#define InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE( \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1593
  T, start_p, count, low, high,             \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1594
  do_oop, assert_fn)                        \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1595
{                                           \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1596
  T* const l = (T*)(low);                   \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1597
  T* const h = (T*)(high);                  \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1598
  assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1599
         mask_bits((intptr_t)h, sizeof(T)-1) == 0,   \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1600
         "bounded region must be properly aligned"); \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1601
  T* p       = (T*)(start_p);               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1602
  T* end     = p + (count);                 \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1603
  if (p < l) p = l;                         \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1604
  if (end > h) end = h;                     \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1605
  while (p < end) {                         \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1606
    (assert_fn)(p);                         \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1607
    do_oop;                                 \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1608
    ++p;                                    \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1609
  }                                         \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1610
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1611
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1612
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1613
// The following macros call specialized macros, passing either oop or
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1614
// narrowOop as the specialization type.  These test the UseCompressedOops
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1615
// flag.
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1616
#define InstanceKlass_OOP_MAP_ITERATE(obj, do_oop, assert_fn)            \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1617
{                                                                        \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1618
  /* Compute oopmap block range. The common case                         \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1619
     is nonstatic_oop_map_size == 1. */                                  \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1620
  OopMapBlock* map           = start_of_nonstatic_oop_maps();            \
3693
af387bf37e8d 6861660: OopMapBlock count/size confusion
jcoomes
parents: 3576
diff changeset
  1621
  OopMapBlock* const end_map = map + nonstatic_oop_map_count();          \
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1622
  if (UseCompressedOops) {                                               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1623
    while (map < end_map) {                                              \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1624
      InstanceKlass_SPECIALIZED_OOP_ITERATE(narrowOop,                   \
3693
af387bf37e8d 6861660: OopMapBlock count/size confusion
jcoomes
parents: 3576
diff changeset
  1625
        obj->obj_field_addr<narrowOop>(map->offset()), map->count(),     \
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1626
        do_oop, assert_fn)                                               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1627
      ++map;                                                             \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1628
    }                                                                    \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1629
  } else {                                                               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1630
    while (map < end_map) {                                              \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1631
      InstanceKlass_SPECIALIZED_OOP_ITERATE(oop,                         \
3693
af387bf37e8d 6861660: OopMapBlock count/size confusion
jcoomes
parents: 3576
diff changeset
  1632
        obj->obj_field_addr<oop>(map->offset()), map->count(),           \
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1633
        do_oop, assert_fn)                                               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1634
      ++map;                                                             \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1635
    }                                                                    \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1636
  }                                                                      \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1637
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1638
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1639
#define InstanceKlass_OOP_MAP_REVERSE_ITERATE(obj, do_oop, assert_fn)    \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1640
{                                                                        \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1641
  OopMapBlock* const start_map = start_of_nonstatic_oop_maps();          \
3693
af387bf37e8d 6861660: OopMapBlock count/size confusion
jcoomes
parents: 3576
diff changeset
  1642
  OopMapBlock* map             = start_map + nonstatic_oop_map_count();  \
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1643
  if (UseCompressedOops) {                                               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1644
    while (start_map < map) {                                            \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1645
      --map;                                                             \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1646
      InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(narrowOop,           \
3693
af387bf37e8d 6861660: OopMapBlock count/size confusion
jcoomes
parents: 3576
diff changeset
  1647
        obj->obj_field_addr<narrowOop>(map->offset()), map->count(),     \
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1648
        do_oop, assert_fn)                                               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1649
    }                                                                    \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1650
  } else {                                                               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1651
    while (start_map < map) {                                            \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1652
      --map;                                                             \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1653
      InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(oop,                 \
3693
af387bf37e8d 6861660: OopMapBlock count/size confusion
jcoomes
parents: 3576
diff changeset
  1654
        obj->obj_field_addr<oop>(map->offset()), map->count(),           \
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1655
        do_oop, assert_fn)                                               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1656
    }                                                                    \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1657
  }                                                                      \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1658
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1659
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1660
#define InstanceKlass_BOUNDED_OOP_MAP_ITERATE(obj, low, high, do_oop,    \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1661
                                              assert_fn)                 \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1662
{                                                                        \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1663
  /* Compute oopmap block range. The common case is                      \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1664
     nonstatic_oop_map_size == 1, so we accept the                       \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1665
     usually non-existent extra overhead of examining                    \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1666
     all the maps. */                                                    \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1667
  OopMapBlock* map           = start_of_nonstatic_oop_maps();            \
3693
af387bf37e8d 6861660: OopMapBlock count/size confusion
jcoomes
parents: 3576
diff changeset
  1668
  OopMapBlock* const end_map = map + nonstatic_oop_map_count();          \
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1669
  if (UseCompressedOops) {                                               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1670
    while (map < end_map) {                                              \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1671
      InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop,           \
3693
af387bf37e8d 6861660: OopMapBlock count/size confusion
jcoomes
parents: 3576
diff changeset
  1672
        obj->obj_field_addr<narrowOop>(map->offset()), map->count(),     \
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1673
        low, high,                                                       \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1674
        do_oop, assert_fn)                                               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1675
      ++map;                                                             \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1676
    }                                                                    \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1677
  } else {                                                               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1678
    while (map < end_map) {                                              \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1679
      InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop,                 \
3693
af387bf37e8d 6861660: OopMapBlock count/size confusion
jcoomes
parents: 3576
diff changeset
  1680
        obj->obj_field_addr<oop>(map->offset()), map->count(),           \
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1681
        low, high,                                                       \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1682
        do_oop, assert_fn)                                               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1683
      ++map;                                                             \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1684
    }                                                                    \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1685
  }                                                                      \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1686
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1687
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1688
void instanceKlass::oop_follow_contents(oop obj) {
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1689
  assert(obj != NULL, "can't follow the content of NULL object");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1690
  obj->follow_header();
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1691
  InstanceKlass_OOP_MAP_ITERATE( \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1692
    obj, \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1693
    MarkSweep::mark_and_push(p), \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1694
    assert_is_in_closed_subset)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1695
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1696
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1697
#ifndef SERIALGC
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1698
void instanceKlass::oop_follow_contents(ParCompactionManager* cm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1699
                                        oop obj) {
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1700
  assert(obj != NULL, "can't follow the content of NULL object");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1701
  obj->follow_header(cm);
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1702
  InstanceKlass_OOP_MAP_ITERATE( \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1703
    obj, \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1704
    PSParallelCompact::mark_and_push(cm, p), \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1705
    assert_is_in)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1706
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1707
#endif // SERIALGC
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1708
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1709
// closure's do_header() method dicates whether the given closure should be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1710
// applied to the klass ptr in the object header.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1711
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1712
#define InstanceKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix)        \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1713
                                                                             \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1714
int instanceKlass::oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1715
  SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1716
  /* header */                                                          \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1717
  if (closure->do_header()) {                                           \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1718
    obj->oop_iterate_header(closure);                                   \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1719
  }                                                                     \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1720
  InstanceKlass_OOP_MAP_ITERATE(                                        \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1721
    obj,                                                                \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1722
    SpecializationStats::                                               \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1723
      record_do_oop_call##nv_suffix(SpecializationStats::ik);           \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1724
    (closure)->do_oop##nv_suffix(p),                                    \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1725
    assert_is_in_closed_subset)                                         \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1726
  return size_helper();                                                 \
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1727
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1728
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1729
#ifndef SERIALGC
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1730
#define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1731
                                                                                \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1732
int instanceKlass::oop_oop_iterate_backwards##nv_suffix(oop obj,                \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1733
                                              OopClosureType* closure) {        \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1734
  SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik); \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1735
  /* header */                                                                  \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1736
  if (closure->do_header()) {                                                   \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1737
    obj->oop_iterate_header(closure);                                           \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1738
  }                                                                             \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1739
  /* instance variables */                                                      \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1740
  InstanceKlass_OOP_MAP_REVERSE_ITERATE(                                        \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1741
    obj,                                                                        \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1742
    SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::ik);\
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1743
    (closure)->do_oop##nv_suffix(p),                                            \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1744
    assert_is_in_closed_subset)                                                 \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1745
   return size_helper();                                                        \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1746
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1747
#endif // !SERIALGC
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1748
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1749
#define InstanceKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1750
                                                                        \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1751
int instanceKlass::oop_oop_iterate##nv_suffix##_m(oop obj,              \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1752
                                                  OopClosureType* closure, \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1753
                                                  MemRegion mr) {          \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1754
  SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1755
  if (closure->do_header()) {                                            \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1756
    obj->oop_iterate_header(closure, mr);                                \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1757
  }                                                                      \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1758
  InstanceKlass_BOUNDED_OOP_MAP_ITERATE(                                 \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1759
    obj, mr.start(), mr.end(),                                           \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1760
    (closure)->do_oop##nv_suffix(p),                                     \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1761
    assert_is_in_closed_subset)                                          \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1762
  return size_helper();                                                  \
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1763
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1764
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1765
ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN)
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1766
ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1767
ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN_m)
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1768
ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN_m)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1769
#ifndef SERIALGC
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1770
ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1771
ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1772
#endif // !SERIALGC
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1773
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1774
int instanceKlass::oop_adjust_pointers(oop obj) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1775
  int size = size_helper();
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1776
  InstanceKlass_OOP_MAP_ITERATE( \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1777
    obj, \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1778
    MarkSweep::adjust_pointer(p), \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1779
    assert_is_in)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1780
  obj->adjust_header();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1781
  return size;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1782
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1783
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1784
#ifndef SERIALGC
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1785
void instanceKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1786
  InstanceKlass_OOP_MAP_REVERSE_ITERATE( \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1787
    obj, \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1788
    if (PSScavenge::should_scavenge(p)) { \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1789
      pm->claim_or_forward_depth(p); \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1790
    }, \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1791
    assert_nothing )
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1792
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1793
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1794
int instanceKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1795
  InstanceKlass_OOP_MAP_ITERATE( \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1796
    obj, \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1797
    PSParallelCompact::adjust_pointer(p), \
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  1798
    assert_nothing)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1799
  return size_helper();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1800
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1801
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1802
#endif // SERIALGC
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1803
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1804
// This klass is alive but the implementor link is not followed/updated.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1805
// Subklass and sibling links are handled by Klass::follow_weak_klass_links
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1806
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1807
void instanceKlass::follow_weak_klass_links(
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1808
  BoolObjectClosure* is_alive, OopClosure* keep_alive) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1809
  assert(is_alive->do_object_b(as_klassOop()), "this oop should be live");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1810
  if (ClassUnloading) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1811
    for (int i = 0; i < implementors_limit; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1812
      klassOop impl = _implementors[i];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1813
      if (impl == NULL)  break;  // no more in the list
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1814
      if (!is_alive->do_object_b(impl)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1815
        // remove this guy from the list by overwriting him with the tail
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1816
        int lasti = --_nof_implementors;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1817
        assert(lasti >= i && lasti < implementors_limit, "just checking");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1818
        _implementors[i] = _implementors[lasti];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1819
        _implementors[lasti] = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1820
        --i; // rerun the loop at this index
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1821
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1822
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1823
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1824
    for (int i = 0; i < implementors_limit; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1825
      keep_alive->do_oop(&adr_implementors()[i]);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1826
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1827
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1828
  Klass::follow_weak_klass_links(is_alive, keep_alive);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1829
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1830
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1831
void instanceKlass::remove_unshareable_info() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1832
  Klass::remove_unshareable_info();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1833
  init_implementor();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1834
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1835
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1836
static void clear_all_breakpoints(methodOop m) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1837
  m->clear_all_breakpoints();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1838
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1839
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1840
void instanceKlass::release_C_heap_structures() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1841
  // Deallocate oop map cache
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1842
  if (_oop_map_cache != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1843
    delete _oop_map_cache;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1844
    _oop_map_cache = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1845
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1846
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1847
  // Deallocate JNI identifiers for jfieldIDs
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1848
  JNIid::deallocate(jni_ids());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1849
  set_jni_ids(NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1850
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1851
  jmethodID* jmeths = methods_jmethod_ids_acquire();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1852
  if (jmeths != (jmethodID*)NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1853
    release_set_methods_jmethod_ids(NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1854
    FreeHeap(jmeths);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1855
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1856
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1857
  int* indices = methods_cached_itable_indices_acquire();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1858
  if (indices != (int*)NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1859
    release_set_methods_cached_itable_indices(NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1860
    FreeHeap(indices);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1861
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1862
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1863
  // release dependencies
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1864
  nmethodBucket* b = _dependencies;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1865
  _dependencies = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1866
  while (b != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1867
    nmethodBucket* next = b->next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1868
    delete b;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1869
    b = next;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1870
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1871
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1872
  // Deallocate breakpoint records
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1873
  if (breakpoints() != 0x0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1874
    methods_do(clear_all_breakpoints);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1875
    assert(breakpoints() == 0x0, "should have cleared breakpoints");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1876
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1877
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1878
  // deallocate information about previous versions
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1879
  if (_previous_versions != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1880
    for (int i = _previous_versions->length() - 1; i >= 0; i--) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1881
      PreviousVersionNode * pv_node = _previous_versions->at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1882
      delete pv_node;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1883
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1884
    delete _previous_versions;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1885
    _previous_versions = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1886
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1887
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1888
  // deallocate the cached class file
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1889
  if (_cached_class_file_bytes != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1890
    os::free(_cached_class_file_bytes);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1891
    _cached_class_file_bytes = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1892
    _cached_class_file_len = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1893
  }
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1894
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1895
  // Decrement symbol reference counts associated with the unloaded class.
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1896
  if (_name != NULL) _name->decrement_refcount();
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1897
  // unreference array name derived from this class name (arrays of an unloaded
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1898
  // class can't be referenced anymore).
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1899
  if (_array_name != NULL)  _array_name->decrement_refcount();
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1900
  if (_source_file_name != NULL) _source_file_name->decrement_refcount();
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1901
  if (_source_debug_extension != NULL) _source_debug_extension->decrement_refcount();
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1902
  // walk constant pool and decrement symbol reference counts
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1903
  _constants->unreference_symbols();
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1904
}
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1905
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1906
void instanceKlass::set_source_file_name(Symbol* n) {
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1907
  _source_file_name = n;
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1908
  if (_source_file_name != NULL) _source_file_name->increment_refcount();
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1909
}
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1910
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1911
void instanceKlass::set_source_debug_extension(Symbol* n) {
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1912
  _source_debug_extension = n;
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1913
  if (_source_debug_extension != NULL) _source_debug_extension->increment_refcount();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1914
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1915
8725
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
  1916
address instanceKlass::static_field_addr(int offset) {
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
  1917
  return (address)(offset + instanceMirrorKlass::offset_of_static_fields() + (intptr_t)java_mirror());
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
  1918
}
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
  1919
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
  1920
4094
1f424b2b2171 6815692: method handle code needs some cleanup (post-6655638)
jrose
parents: 3916
diff changeset
  1921
const char* instanceKlass::signature_name() const {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1922
  const char* src = (const char*) (name()->as_C_string());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1923
  const int src_length = (int)strlen(src);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1924
  char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1925
  int src_index = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1926
  int dest_index = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1927
  dest[dest_index++] = 'L';
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1928
  while (src_index < src_length) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1929
    dest[dest_index++] = src[src_index++];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1930
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1931
  dest[dest_index++] = ';';
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1932
  dest[dest_index] = '\0';
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1933
  return dest;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1934
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1935
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1936
// different verisons of is_same_class_package
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1937
bool instanceKlass::is_same_class_package(klassOop class2) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1938
  klassOop class1 = as_klassOop();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1939
  oop classloader1 = instanceKlass::cast(class1)->class_loader();
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1940
  Symbol* classname1 = Klass::cast(class1)->name();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1941
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1942
  if (Klass::cast(class2)->oop_is_objArray()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1943
    class2 = objArrayKlass::cast(class2)->bottom_klass();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1944
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1945
  oop classloader2;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1946
  if (Klass::cast(class2)->oop_is_instance()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1947
    classloader2 = instanceKlass::cast(class2)->class_loader();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1948
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1949
    assert(Klass::cast(class2)->oop_is_typeArray(), "should be type array");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1950
    classloader2 = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1951
  }
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1952
  Symbol* classname2 = Klass::cast(class2)->name();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1953
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1954
  return instanceKlass::is_same_class_package(classloader1, classname1,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1955
                                              classloader2, classname2);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1956
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1957
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1958
bool instanceKlass::is_same_class_package(oop classloader2, Symbol* classname2) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1959
  klassOop class1 = as_klassOop();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1960
  oop classloader1 = instanceKlass::cast(class1)->class_loader();
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1961
  Symbol* classname1 = Klass::cast(class1)->name();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1962
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1963
  return instanceKlass::is_same_class_package(classloader1, classname1,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1964
                                              classloader2, classname2);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1965
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1966
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1967
// return true if two classes are in the same package, classloader
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1968
// and classname information is enough to determine a class's package
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1969
bool instanceKlass::is_same_class_package(oop class_loader1, Symbol* class_name1,
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1970
                                          oop class_loader2, Symbol* class_name2) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1971
  if (class_loader1 != class_loader2) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1972
    return false;
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  1973
  } else if (class_name1 == class_name2) {
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  1974
    return true;                // skip painful bytewise comparison
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1975
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1976
    ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1977
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1978
    // The Symbol*'s are in UTF8 encoding. Since we only need to check explicitly
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1979
    // for ASCII characters ('/', 'L', '['), we can keep them in UTF8 encoding.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1980
    // Otherwise, we just compare jbyte values between the strings.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1981
    const jbyte *name1 = class_name1->base();
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1982
    const jbyte *name2 = class_name2->base();
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1983
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1984
    const jbyte *last_slash1 = UTF8::strrchr(name1, class_name1->utf8_length(), '/');
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  1985
    const jbyte *last_slash2 = UTF8::strrchr(name2, class_name2->utf8_length(), '/');
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1986
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1987
    if ((last_slash1 == NULL) || (last_slash2 == NULL)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1988
      // One of the two doesn't have a package.  Only return true
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1989
      // if the other one also doesn't have a package.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1990
      return last_slash1 == last_slash2;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1991
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1992
      // Skip over '['s
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1993
      if (*name1 == '[') {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1994
        do {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1995
          name1++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1996
        } while (*name1 == '[');
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1997
        if (*name1 != 'L') {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1998
          // Something is terribly wrong.  Shouldn't be here.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1999
          return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2000
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2001
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2002
      if (*name2 == '[') {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2003
        do {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2004
          name2++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2005
        } while (*name2 == '[');
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2006
        if (*name2 != 'L') {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2007
          // Something is terribly wrong.  Shouldn't be here.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2008
          return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2009
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2010
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2011
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2012
      // Check that package part is identical
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2013
      int length1 = last_slash1 - name1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2014
      int length2 = last_slash2 - name2;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2015
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2016
      return UTF8::equal(name1, length1, name2, length2);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2017
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2018
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2019
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2020
2264
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2021
// Returns true iff super_method can be overridden by a method in targetclassname
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2022
// See JSL 3rd edition 8.4.6.1
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2023
// Assumes name-signature match
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2024
// "this" is instanceKlass of super_method which must exist
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2025
// note that the instanceKlass of the method in the targetclassname has not always been created yet
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  2026
bool instanceKlass::is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS) {
2264
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2027
   // Private methods can not be overridden
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2028
   if (super_method->is_private()) {
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2029
     return false;
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2030
   }
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2031
   // If super method is accessible, then override
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2032
   if ((super_method->is_protected()) ||
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2033
       (super_method->is_public())) {
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2034
     return true;
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2035
   }
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2036
   // Package-private methods are not inherited outside of package
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2037
   assert(super_method->is_package_private(), "must be package private");
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  2038
   return(is_same_class_package(targetclassloader(), targetclassname));
2264
55d0115a54fe 4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents: 2131
diff changeset
  2039
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2040
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2041
/* defined for now in jvm.cpp, for historical reasons *--
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2042
klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle self,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  2043
                                                     Symbol*& simple_name_result, TRAPS) {
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2044
  ...
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2045
}
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2046
*/
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2047
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2048
// tell if two classes have the same enclosing class (at package level)
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2049
bool instanceKlass::is_same_package_member_impl(instanceKlassHandle class1,
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2050
                                                klassOop class2_oop, TRAPS) {
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2051
  if (class2_oop == class1->as_klassOop())          return true;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2052
  if (!Klass::cast(class2_oop)->oop_is_instance())  return false;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2053
  instanceKlassHandle class2(THREAD, class2_oop);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2054
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2055
  // must be in same package before we try anything else
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2056
  if (!class1->is_same_class_package(class2->class_loader(), class2->name()))
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2057
    return false;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2058
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2059
  // As long as there is an outer1.getEnclosingClass,
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2060
  // shift the search outward.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2061
  instanceKlassHandle outer1 = class1;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2062
  for (;;) {
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2063
    // As we walk along, look for equalities between outer1 and class2.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2064
    // Eventually, the walks will terminate as outer1 stops
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2065
    // at the top-level class around the original class.
4496
c5a0b15a8e7d 6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents: 4094
diff changeset
  2066
    bool ignore_inner_is_member;
c5a0b15a8e7d 6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents: 4094
diff changeset
  2067
    klassOop next = outer1->compute_enclosing_class(&ignore_inner_is_member,
c5a0b15a8e7d 6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents: 4094
diff changeset
  2068
                                                    CHECK_false);
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2069
    if (next == NULL)  break;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2070
    if (next == class2())  return true;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2071
    outer1 = instanceKlassHandle(THREAD, next);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2072
  }
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2073
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2074
  // Now do the same for class2.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2075
  instanceKlassHandle outer2 = class2;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2076
  for (;;) {
4496
c5a0b15a8e7d 6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents: 4094
diff changeset
  2077
    bool ignore_inner_is_member;
c5a0b15a8e7d 6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents: 4094
diff changeset
  2078
    klassOop next = outer2->compute_enclosing_class(&ignore_inner_is_member,
c5a0b15a8e7d 6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents: 4094
diff changeset
  2079
                                                    CHECK_false);
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2080
    if (next == NULL)  break;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2081
    // Might as well check the new outer against all available values.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2082
    if (next == class1())  return true;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2083
    if (next == outer1())  return true;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2084
    outer2 = instanceKlassHandle(THREAD, next);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2085
  }
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2086
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2087
  // If by this point we have not found an equality between the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2088
  // two classes, we know they are in separate package members.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2089
  return false;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2090
}
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2091
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2092
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2093
jint instanceKlass::compute_modifier_flags(TRAPS) const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2094
  klassOop k = as_klassOop();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2095
  jint access = access_flags().as_int();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2096
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2097
  // But check if it happens to be member class.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2098
  typeArrayOop inner_class_list = inner_classes();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2099
  int length = (inner_class_list == NULL) ? 0 : inner_class_list->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2100
  assert (length % instanceKlass::inner_class_next_offset == 0, "just checking");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2101
  if (length > 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2102
    typeArrayHandle inner_class_list_h(THREAD, inner_class_list);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2103
    instanceKlassHandle ik(THREAD, k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2104
    for (int i = 0; i < length; i += instanceKlass::inner_class_next_offset) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2105
      int ioff = inner_class_list_h->ushort_at(
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2106
                      i + instanceKlass::inner_class_inner_class_info_offset);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2107
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2108
      // Inner class attribute can be zero, skip it.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2109
      // Strange but true:  JVM spec. allows null inner class refs.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2110
      if (ioff == 0) continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2111
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2112
      // only look at classes that are already loaded
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2113
      // since we are looking for the flags for our self.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  2114
      Symbol* inner_name = ik->constants()->klass_name_at(ioff);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2115
      if ((ik->name() == inner_name)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2116
        // This is really a member class.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2117
        access = inner_class_list_h->ushort_at(i + instanceKlass::inner_class_access_flags_offset);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2118
        break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2119
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2120
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2121
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2122
  // Remember to strip ACC_SUPER bit
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2123
  return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2124
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2125
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2126
jint instanceKlass::jvmti_class_status() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2127
  jint result = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2128
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2129
  if (is_linked()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2130
    result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2131
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2132
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2133
  if (is_initialized()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2134
    assert(is_linked(), "Class status is not consistent");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2135
    result |= JVMTI_CLASS_STATUS_INITIALIZED;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2136
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2137
  if (is_in_error_state()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2138
    result |= JVMTI_CLASS_STATUS_ERROR;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2139
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2140
  return result;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2141
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2142
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2143
methodOop instanceKlass::method_at_itable(klassOop holder, int index, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2144
  itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2145
  int method_table_offset_in_words = ioe->offset()/wordSize;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2146
  int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words())
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2147
                       / itableOffsetEntry::size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2148
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2149
  for (int cnt = 0 ; ; cnt ++, ioe ++) {
2131
98f9cef66a34 6810672: Comment typos
twisti
parents: 1388
diff changeset
  2150
    // If the interface isn't implemented by the receiver class,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2151
    // the VM should throw IncompatibleClassChangeError.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2152
    if (cnt >= nof_interfaces) {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  2153
      THROW_0(vmSymbols::java_lang_IncompatibleClassChangeError());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2154
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2155
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2156
    klassOop ik = ioe->interface_klass();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2157
    if (ik == holder) break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2158
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2159
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2160
  itableMethodEntry* ime = ioe->first_method_entry(as_klassOop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2161
  methodOop m = ime[index].method();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2162
  if (m == NULL) {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  2163
    THROW_0(vmSymbols::java_lang_AbstractMethodError());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2164
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2165
  return m;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2166
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2167
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2168
// On-stack replacement stuff
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2169
void instanceKlass::add_osr_nmethod(nmethod* n) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2170
  // only one compilation can be active
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2171
  NEEDS_CLEANUP
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2172
  // This is a short non-blocking critical region, so the no safepoint check is ok.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2173
  OsrList_lock->lock_without_safepoint_check();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2174
  assert(n->is_osr_method(), "wrong kind of nmethod");
3908
24b55ad4c228 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 3576
diff changeset
  2175
  n->set_osr_link(osr_nmethods_head());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2176
  set_osr_nmethods_head(n);
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2177
  // Raise the highest osr level if necessary
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2178
  if (TieredCompilation) {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2179
    methodOop m = n->method();
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2180
    m->set_highest_osr_comp_level(MAX2(m->highest_osr_comp_level(), n->comp_level()));
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2181
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2182
  // Remember to unlock again
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2183
  OsrList_lock->unlock();
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2184
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2185
  // Get rid of the osr methods for the same bci that have lower levels.
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2186
  if (TieredCompilation) {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2187
    for (int l = CompLevel_limited_profile; l < n->comp_level(); l++) {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2188
      nmethod *inv = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), l, true);
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2189
      if (inv != NULL && inv->is_in_use()) {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2190
        inv->make_not_entrant();
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2191
      }
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2192
    }
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2193
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2194
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2195
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2196
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2197
void instanceKlass::remove_osr_nmethod(nmethod* n) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2198
  // This is a short non-blocking critical region, so the no safepoint check is ok.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2199
  OsrList_lock->lock_without_safepoint_check();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2200
  assert(n->is_osr_method(), "wrong kind of nmethod");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2201
  nmethod* last = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2202
  nmethod* cur  = osr_nmethods_head();
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2203
  int max_level = CompLevel_none;  // Find the max comp level excluding n
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2204
  methodOop m = n->method();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2205
  // Search for match
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2206
  while(cur != NULL && cur != n) {
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2207
    if (TieredCompilation) {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2208
      // Find max level before n
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2209
      max_level = MAX2(max_level, cur->comp_level());
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2210
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2211
    last = cur;
3908
24b55ad4c228 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 3576
diff changeset
  2212
    cur = cur->osr_link();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2213
  }
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2214
  nmethod* next = NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2215
  if (cur == n) {
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2216
    next = cur->osr_link();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2217
    if (last == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2218
      // Remove first element
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2219
      set_osr_nmethods_head(next);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2220
    } else {
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2221
      last->set_osr_link(next);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2222
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2223
  }
3908
24b55ad4c228 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 3576
diff changeset
  2224
  n->set_osr_link(NULL);
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2225
  if (TieredCompilation) {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2226
    cur = next;
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2227
    while (cur != NULL) {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2228
      // Find max level after n
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2229
      max_level = MAX2(max_level, cur->comp_level());
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2230
      cur = cur->osr_link();
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2231
    }
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2232
    m->set_highest_osr_comp_level(max_level);
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2233
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2234
  // Remember to unlock again
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2235
  OsrList_lock->unlock();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2236
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2237
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2238
nmethod* instanceKlass::lookup_osr_nmethod(const methodOop m, int bci, int comp_level, bool match_level) const {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2239
  // This is a short non-blocking critical region, so the no safepoint check is ok.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2240
  OsrList_lock->lock_without_safepoint_check();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2241
  nmethod* osr = osr_nmethods_head();
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2242
  nmethod* best = NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2243
  while (osr != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2244
    assert(osr->is_osr_method(), "wrong kind of nmethod found in chain");
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2245
    // There can be a time when a c1 osr method exists but we are waiting
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2246
    // for a c2 version. When c2 completes its osr nmethod we will trash
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2247
    // the c1 version and only be able to find the c2 version. However
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2248
    // while we overflow in the c1 code at back branches we don't want to
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2249
    // try and switch to the same code as we are already running
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2250
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2251
    if (osr->method() == m &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2252
        (bci == InvocationEntryBci || osr->osr_entry_bci() == bci)) {
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2253
      if (match_level) {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2254
        if (osr->comp_level() == comp_level) {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2255
          // Found a match - return it.
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2256
          OsrList_lock->unlock();
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2257
          return osr;
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2258
        }
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2259
      } else {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2260
        if (best == NULL || (osr->comp_level() > best->comp_level())) {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2261
          if (osr->comp_level() == CompLevel_highest_tier) {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2262
            // Found the best possible - return it.
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2263
            OsrList_lock->unlock();
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2264
            return osr;
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2265
          }
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2266
          best = osr;
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2267
        }
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2268
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2269
    }
3908
24b55ad4c228 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 3576
diff changeset
  2270
    osr = osr->osr_link();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2271
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2272
  OsrList_lock->unlock();
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2273
  if (best != NULL && best->comp_level() >= comp_level && match_level == false) {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2274
    return best;
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6421
diff changeset
  2275
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2276
  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2277
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2278
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2279
// -----------------------------------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2280
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2281
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2282
// Printing
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2283
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2284
#define BULLET  " - "
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2285
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2286
void FieldPrinter::do_field(fieldDescriptor* fd) {
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2287
  _st->print(BULLET);
8725
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
  2288
   if (_obj == NULL) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2289
     fd->print_on(_st);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2290
     _st->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2291
   } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2292
     fd->print_on_for(_st, _obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2293
     _st->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2294
   }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2295
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2296
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2297
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2298
void instanceKlass::oop_print_on(oop obj, outputStream* st) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2299
  Klass::oop_print_on(obj, st);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2300
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4094
diff changeset
  2301
  if (as_klassOop() == SystemDictionary::String_klass()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2302
    typeArrayOop value  = java_lang_String::value(obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2303
    juint        offset = java_lang_String::offset(obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2304
    juint        length = java_lang_String::length(obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2305
    if (value != NULL &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2306
        value->is_typeArray() &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2307
        offset          <= (juint) value->length() &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2308
        offset + length <= (juint) value->length()) {
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2309
      st->print(BULLET"string: ");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2310
      Handle h_obj(obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2311
      java_lang_String::print(h_obj, st);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2312
      st->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2313
      if (!WizardMode)  return;  // that is enough
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2314
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2315
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2316
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2317
  st->print_cr(BULLET"---- fields (total size %d words):", oop_size(obj));
8725
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
  2318
  FieldPrinter print_field(st, obj);
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
  2319
  do_nonstatic_fields(&print_field);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2320
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4094
diff changeset
  2321
  if (as_klassOop() == SystemDictionary::Class_klass()) {
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2322
    st->print(BULLET"signature: ");
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2323
    java_lang_Class::print_signature(obj, st);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2324
    st->cr();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2325
    klassOop mirrored_klass = java_lang_Class::as_klassOop(obj);
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2326
    st->print(BULLET"fake entry for mirror: ");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2327
    mirrored_klass->print_value_on(st);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2328
    st->cr();
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2329
    st->print(BULLET"fake entry resolved_constructor: ");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2330
    methodOop ctor = java_lang_Class::resolved_constructor(obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2331
    ctor->print_value_on(st);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2332
    klassOop array_klass = java_lang_Class::array_klass(obj);
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2333
    st->cr();
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2334
    st->print(BULLET"fake entry for array: ");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2335
    array_klass->print_value_on(st);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2336
    st->cr();
8725
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
  2337
    st->print_cr(BULLET"fake entry for oop_size: %d", java_lang_Class::oop_size(obj));
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
  2338
    st->print_cr(BULLET"fake entry for static_oop_field_count: %d", java_lang_Class::static_oop_field_count(obj));
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
  2339
    klassOop real_klass = java_lang_Class::as_klassOop(obj);
8875
bc9f101d8df6 7032306: Fastdebug build failure on Solaris with SS11 compilers
never
parents: 8725
diff changeset
  2340
    if (real_klass != NULL && real_klass->klass_part()->oop_is_instance()) {
8725
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
  2341
      instanceKlass::cast(real_klass)->do_local_static_fields(&print_field);
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
  2342
    }
4094
1f424b2b2171 6815692: method handle code needs some cleanup (post-6655638)
jrose
parents: 3916
diff changeset
  2343
  } else if (as_klassOop() == SystemDictionary::MethodType_klass()) {
1f424b2b2171 6815692: method handle code needs some cleanup (post-6655638)
jrose
parents: 3916
diff changeset
  2344
    st->print(BULLET"signature: ");
8676
9098d4e927e1 7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents: 8653
diff changeset
  2345
    java_lang_invoke_MethodType::print_signature(obj, st);
4094
1f424b2b2171 6815692: method handle code needs some cleanup (post-6655638)
jrose
parents: 3916
diff changeset
  2346
    st->cr();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2347
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2348
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2349
4584
e2a449e8cc6f 6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents: 4573
diff changeset
  2350
#endif //PRODUCT
e2a449e8cc6f 6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents: 4573
diff changeset
  2351
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2352
void instanceKlass::oop_print_value_on(oop obj, outputStream* st) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2353
  st->print("a ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2354
  name()->print_value_on(st);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2355
  obj->print_address_on(st);
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4094
diff changeset
  2356
  if (as_klassOop() == SystemDictionary::String_klass()
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2357
      && java_lang_String::value(obj) != NULL) {
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2358
    ResourceMark rm;
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2359
    int len = java_lang_String::length(obj);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2360
    int plen = (len < 24 ? len : 12);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2361
    char* str = java_lang_String::as_utf8_string(obj, 0, plen);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2362
    st->print(" = \"%s\"", str);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2363
    if (len > plen)
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2364
      st->print("...[%d]", len);
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4094
diff changeset
  2365
  } else if (as_klassOop() == SystemDictionary::Class_klass()) {
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2366
    klassOop k = java_lang_Class::as_klassOop(obj);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2367
    st->print(" = ");
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2368
    if (k != NULL) {
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2369
      k->print_value_on(st);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2370
    } else {
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2371
      const char* tname = type2name(java_lang_Class::primitive_type(obj));
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2372
      st->print("%s", tname ? tname : "type?");
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2373
    }
4094
1f424b2b2171 6815692: method handle code needs some cleanup (post-6655638)
jrose
parents: 3916
diff changeset
  2374
  } else if (as_klassOop() == SystemDictionary::MethodType_klass()) {
1f424b2b2171 6815692: method handle code needs some cleanup (post-6655638)
jrose
parents: 3916
diff changeset
  2375
    st->print(" = ");
8676
9098d4e927e1 7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents: 8653
diff changeset
  2376
    java_lang_invoke_MethodType::print_signature(obj, st);
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2377
  } else if (java_lang_boxing_object::is_instance(obj)) {
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2378
    st->print(" = ");
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2379
    java_lang_boxing_object::print(obj, st);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2131
diff changeset
  2380
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2381
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2382
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2383
const char* instanceKlass::internal_name() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2384
  return external_name();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2385
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2386
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2387
// Verification
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2388
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2389
class VerifyFieldClosure: public OopClosure {
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2390
 protected:
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2391
  template <class T> void do_oop_work(T* p) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2392
    guarantee(Universe::heap()->is_in_closed_subset(p), "should be in heap");
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2393
    oop obj = oopDesc::load_decode_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2394
    if (!obj->is_oop_or_null()) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2395
      tty->print_cr("Failed: " PTR_FORMAT " -> " PTR_FORMAT, p, (address)obj);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2396
      Universe::print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2397
      guarantee(false, "boom");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2398
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2399
  }
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2400
 public:
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2401
  virtual void do_oop(oop* p)       { VerifyFieldClosure::do_oop_work(p); }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2402
  virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2403
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2404
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2405
void instanceKlass::oop_verify_on(oop obj, outputStream* st) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2406
  Klass::oop_verify_on(obj, st);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2407
  VerifyFieldClosure blk;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2408
  oop_oop_iterate(obj, &blk);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2409
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2410
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2411
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2412
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2413
void instanceKlass::verify_class_klass_nonstatic_oop_maps(klassOop k) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2414
  // This verification code is disabled.  JDK_Version::is_gte_jdk14x_version()
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2415
  // cannot be called since this function is called before the VM is
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2416
  // able to determine what JDK version is running with.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2417
  // The check below always is false since 1.4.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2418
  return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2419
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2420
  // This verification code temporarily disabled for the 1.4
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2421
  // reflection implementation since java.lang.Class now has
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2422
  // Java-level instance fields. Should rewrite this to handle this
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2423
  // case.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2424
  if (!(JDK_Version::is_gte_jdk14x_version() && UseNewReflection)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2425
    // Verify that java.lang.Class instances have a fake oop field added.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2426
    instanceKlass* ik = instanceKlass::cast(k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2427
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2428
    // Check that we have the right class
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2429
    static bool first_time = true;
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4094
diff changeset
  2430
    guarantee(k == SystemDictionary::Class_klass() && first_time, "Invalid verify of maps");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2431
    first_time = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2432
    const int extra = java_lang_Class::number_of_fake_oop_fields;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2433
    guarantee(ik->nonstatic_field_size() == extra, "just checking");
3693
af387bf37e8d 6861660: OopMapBlock count/size confusion
jcoomes
parents: 3576
diff changeset
  2434
    guarantee(ik->nonstatic_oop_map_count() == 1, "just checking");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2435
    guarantee(ik->size_helper() == align_object_size(instanceOopDesc::header_size() + extra), "just checking");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2436
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2437
    // Check that the map is (2,extra)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2438
    int offset = java_lang_Class::klass_offset;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2439
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2440
    OopMapBlock* map = ik->start_of_nonstatic_oop_maps();
3694
942b7bc7f28c 6845368: large objects cause a crash or unexpected exception
jcoomes
parents: 3693
diff changeset
  2441
    guarantee(map->offset() == offset && map->count() == (unsigned int) extra,
942b7bc7f28c 6845368: large objects cause a crash or unexpected exception
jcoomes
parents: 3693
diff changeset
  2442
              "sanity");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2443
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2444
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2445
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2446
#endif // ndef PRODUCT
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2447
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2448
// JNIid class for jfieldIDs only
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2449
// Note to reviewers:
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2450
// These JNI functions are just moved over to column 1 and not changed
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2451
// in the compressed oops workspace.
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2452
JNIid::JNIid(klassOop holder, int offset, JNIid* next) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2453
  _holder = holder;
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2454
  _offset = offset;
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2455
  _next = next;
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2456
  debug_only(_is_static_field_id = false;)
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2457
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2458
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2459
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2460
JNIid* JNIid::find(int offset) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2461
  JNIid* current = this;
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2462
  while (current != NULL) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2463
    if (current->offset() == offset) return current;
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2464
    current = current->next();
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2465
  }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2466
  return NULL;
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2467
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2468
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2469
void JNIid::oops_do(OopClosure* f) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2470
  for (JNIid* cur = this; cur != NULL; cur = cur->next()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2471
    f->do_oop(cur->holder_addr());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2472
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2473
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2474
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2475
void JNIid::deallocate(JNIid* current) {
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2476
  while (current != NULL) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2477
    JNIid* next = current->next();
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2478
    delete current;
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2479
    current = next;
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2480
  }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2481
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2482
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2483
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2484
void JNIid::verify(klassOop holder) {
8725
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8676
diff changeset
  2485
  int first_field_offset  = instanceMirrorKlass::offset_of_static_fields();
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2486
  int end_field_offset;
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2487
  end_field_offset = first_field_offset + (instanceKlass::cast(holder)->static_field_size() * wordSize);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2488
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2489
  JNIid* current = this;
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2490
  while (current != NULL) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2491
    guarantee(current->holder() == holder, "Invalid klass in JNIid");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2492
#ifdef ASSERT
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2493
    int o = current->offset();
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2494
    if (current->is_static_field_id()) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2495
      guarantee(o >= first_field_offset  && o < end_field_offset,  "Invalid static field offset in JNIid");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2496
    }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2497
#endif
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2498
    current = current->next();
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2499
  }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2500
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2501
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2502
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2503
#ifdef ASSERT
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2504
void instanceKlass::set_init_state(ClassState state) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2505
  bool good_state = as_klassOop()->is_shared() ? (_init_state <= state)
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2506
                                               : (_init_state < state);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2507
  assert(good_state || state == allocated, "illegal state transition");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2508
  _init_state = state;
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2509
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2510
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2511
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2512
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2513
// RedefineClasses() support for previous versions:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2514
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2515
// Add an information node that contains weak references to the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2516
// interesting parts of the previous version of the_class.
3824
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  2517
// This is also where we clean out any unused weak references.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  2518
// Note that while we delete nodes from the _previous_versions
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  2519
// array, we never delete the array itself until the klass is
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  2520
// unloaded. The has_been_redefined() query depends on that fact.
86e9e4b25bdf 6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents: 3821
diff changeset
  2521
//
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2522
void instanceKlass::add_previous_version(instanceKlassHandle ikh,
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2523
       BitMap* emcp_methods, int emcp_method_count) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2524
  assert(Thread::current()->is_VM_thread(),
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 225
diff changeset
  2525
         "only VMThread can add previous versions");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2526
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2527
  if (_previous_versions == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2528
    // This is the first previous version so make some space.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2529
    // Start with 2 elements under the assumption that the class
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2530
    // won't be redefined much.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2531
    _previous_versions =  new (ResourceObj::C_HEAP)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2532
                            GrowableArray<PreviousVersionNode *>(2, true);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2533
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2534
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2535
  // RC_TRACE macro has an embedded ResourceMark
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2536
  RC_TRACE(0x00000100, ("adding previous version ref for %s @%d, EMCP_cnt=%d",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2537
    ikh->external_name(), _previous_versions->length(), emcp_method_count));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2538
  constantPoolHandle cp_h(ikh->constants());
220
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2539
  jobject cp_ref;
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2540
  if (cp_h->is_shared()) {
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2541
    // a shared ConstantPool requires a regular reference; a weak
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2542
    // reference would be collectible
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2543
    cp_ref = JNIHandles::make_global(cp_h);
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2544
  } else {
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2545
    cp_ref = JNIHandles::make_weak_global(cp_h);
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2546
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2547
  PreviousVersionNode * pv_node = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2548
  objArrayOop old_methods = ikh->methods();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2549
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2550
  if (emcp_method_count == 0) {
220
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2551
    // non-shared ConstantPool gets a weak reference
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2552
    pv_node = new PreviousVersionNode(cp_ref, !cp_h->is_shared(), NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2553
    RC_TRACE(0x00000400,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2554
      ("add: all methods are obsolete; flushing any EMCP weak refs"));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2555
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2556
    int local_count = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2557
    GrowableArray<jweak>* method_refs = new (ResourceObj::C_HEAP)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2558
      GrowableArray<jweak>(emcp_method_count, true);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2559
    for (int i = 0; i < old_methods->length(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2560
      if (emcp_methods->at(i)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2561
        // this old method is EMCP so save a weak ref
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2562
        methodOop old_method = (methodOop) old_methods->obj_at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2563
        methodHandle old_method_h(old_method);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2564
        jweak method_ref = JNIHandles::make_weak_global(old_method_h);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2565
        method_refs->append(method_ref);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2566
        if (++local_count >= emcp_method_count) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2567
          // no more EMCP methods so bail out now
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2568
          break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2569
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2570
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2571
    }
220
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2572
    // non-shared ConstantPool gets a weak reference
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2573
    pv_node = new PreviousVersionNode(cp_ref, !cp_h->is_shared(), method_refs);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2574
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2575
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2576
  _previous_versions->append(pv_node);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2577
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2578
  // Using weak references allows the interesting parts of previous
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2579
  // classes to be GC'ed when they are no longer needed. Since the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2580
  // caller is the VMThread and we are at a safepoint, this is a good
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2581
  // time to clear out unused weak references.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2582
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2583
  RC_TRACE(0x00000400, ("add: previous version length=%d",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2584
    _previous_versions->length()));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2585
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2586
  // skip the last entry since we just added it
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2587
  for (int i = _previous_versions->length() - 2; i >= 0; i--) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2588
    // check the previous versions array for a GC'ed weak refs
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2589
    pv_node = _previous_versions->at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2590
    cp_ref = pv_node->prev_constant_pool();
220
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2591
    assert(cp_ref != NULL, "cp ref was unexpectedly cleared");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2592
    if (cp_ref == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2593
      delete pv_node;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2594
      _previous_versions->remove_at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2595
      // Since we are traversing the array backwards, we don't have to
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2596
      // do anything special with the index.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2597
      continue;  // robustness
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2598
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2599
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2600
    constantPoolOop cp = (constantPoolOop)JNIHandles::resolve(cp_ref);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2601
    if (cp == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2602
      // this entry has been GC'ed so remove it
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2603
      delete pv_node;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2604
      _previous_versions->remove_at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2605
      // Since we are traversing the array backwards, we don't have to
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2606
      // do anything special with the index.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2607
      continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2608
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2609
      RC_TRACE(0x00000400, ("add: previous version @%d is alive", i));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2610
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2611
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2612
    GrowableArray<jweak>* method_refs = pv_node->prev_EMCP_methods();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2613
    if (method_refs != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2614
      RC_TRACE(0x00000400, ("add: previous methods length=%d",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2615
        method_refs->length()));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2616
      for (int j = method_refs->length() - 1; j >= 0; j--) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2617
        jweak method_ref = method_refs->at(j);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2618
        assert(method_ref != NULL, "weak method ref was unexpectedly cleared");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2619
        if (method_ref == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2620
          method_refs->remove_at(j);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2621
          // Since we are traversing the array backwards, we don't have to
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2622
          // do anything special with the index.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2623
          continue;  // robustness
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2624
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2625
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2626
        methodOop method = (methodOop)JNIHandles::resolve(method_ref);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2627
        if (method == NULL || emcp_method_count == 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2628
          // This method entry has been GC'ed or the current
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2629
          // RedefineClasses() call has made all methods obsolete
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2630
          // so remove it.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2631
          JNIHandles::destroy_weak_global(method_ref);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2632
          method_refs->remove_at(j);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2633
        } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2634
          // RC_TRACE macro has an embedded ResourceMark
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2635
          RC_TRACE(0x00000400,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2636
            ("add: %s(%s): previous method @%d in version @%d is alive",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2637
            method->name()->as_C_string(), method->signature()->as_C_string(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2638
            j, i));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2639
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2640
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2641
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2642
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2643
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2644
  int obsolete_method_count = old_methods->length() - emcp_method_count;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2645
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2646
  if (emcp_method_count != 0 && obsolete_method_count != 0 &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2647
      _previous_versions->length() > 1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2648
    // We have a mix of obsolete and EMCP methods. If there is more
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2649
    // than the previous version that we just added, then we have to
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2650
    // clear out any matching EMCP method entries the hard way.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2651
    int local_count = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2652
    for (int i = 0; i < old_methods->length(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2653
      if (!emcp_methods->at(i)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2654
        // only obsolete methods are interesting
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2655
        methodOop old_method = (methodOop) old_methods->obj_at(i);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  2656
        Symbol* m_name = old_method->name();
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7397
diff changeset
  2657
        Symbol* m_signature = old_method->signature();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2658
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2659
        // skip the last entry since we just added it
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2660
        for (int j = _previous_versions->length() - 2; j >= 0; j--) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2661
          // check the previous versions array for a GC'ed weak refs
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2662
          pv_node = _previous_versions->at(j);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2663
          cp_ref = pv_node->prev_constant_pool();
220
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2664
          assert(cp_ref != NULL, "cp ref was unexpectedly cleared");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2665
          if (cp_ref == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2666
            delete pv_node;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2667
            _previous_versions->remove_at(j);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2668
            // Since we are traversing the array backwards, we don't have to
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2669
            // do anything special with the index.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2670
            continue;  // robustness
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2671
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2672
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2673
          constantPoolOop cp = (constantPoolOop)JNIHandles::resolve(cp_ref);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2674
          if (cp == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2675
            // this entry has been GC'ed so remove it
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2676
            delete pv_node;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2677
            _previous_versions->remove_at(j);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2678
            // Since we are traversing the array backwards, we don't have to
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2679
            // do anything special with the index.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2680
            continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2681
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2682
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2683
          GrowableArray<jweak>* method_refs = pv_node->prev_EMCP_methods();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2684
          if (method_refs == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2685
            // We have run into a PreviousVersion generation where
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2686
            // all methods were made obsolete during that generation's
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2687
            // RedefineClasses() operation. At the time of that
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2688
            // operation, all EMCP methods were flushed so we don't
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2689
            // have to go back any further.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2690
            //
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2691
            // A NULL method_refs is different than an empty method_refs.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2692
            // We cannot infer any optimizations about older generations
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2693
            // from an empty method_refs for the current generation.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2694
            break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2695
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2696
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2697
          for (int k = method_refs->length() - 1; k >= 0; k--) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2698
            jweak method_ref = method_refs->at(k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2699
            assert(method_ref != NULL,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2700
              "weak method ref was unexpectedly cleared");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2701
            if (method_ref == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2702
              method_refs->remove_at(k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2703
              // Since we are traversing the array backwards, we don't
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2704
              // have to do anything special with the index.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2705
              continue;  // robustness
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2706
            }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2707
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2708
            methodOop method = (methodOop)JNIHandles::resolve(method_ref);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2709
            if (method == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2710
              // this method entry has been GC'ed so skip it
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2711
              JNIHandles::destroy_weak_global(method_ref);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2712
              method_refs->remove_at(k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2713
              continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2714
            }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2715
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2716
            if (method->name() == m_name &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2717
                method->signature() == m_signature) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2718
              // The current RedefineClasses() call has made all EMCP
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2719
              // versions of this method obsolete so mark it as obsolete
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2720
              // and remove the weak ref.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2721
              RC_TRACE(0x00000400,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2722
                ("add: %s(%s): flush obsolete method @%d in version @%d",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2723
                m_name->as_C_string(), m_signature->as_C_string(), k, j));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2724
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2725
              method->set_is_obsolete();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2726
              JNIHandles::destroy_weak_global(method_ref);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2727
              method_refs->remove_at(k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2728
              break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2729
            }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2730
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2731
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2732
          // The previous loop may not find a matching EMCP method, but
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2733
          // that doesn't mean that we can optimize and not go any
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2734
          // further back in the PreviousVersion generations. The EMCP
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2735
          // method for this generation could have already been GC'ed,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2736
          // but there still may be an older EMCP method that has not
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2737
          // been GC'ed.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2738
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2739
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2740
        if (++local_count >= obsolete_method_count) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2741
          // no more obsolete methods so bail out now
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2742
          break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2743
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2744
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2745
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2746
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2747
} // end add_previous_version()
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2748
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2749
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2750
// Determine if instanceKlass has a previous version.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2751
bool instanceKlass::has_previous_version() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2752
  if (_previous_versions == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2753
    // no previous versions array so answer is easy
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2754
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2755
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2756
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2757
  for (int i = _previous_versions->length() - 1; i >= 0; i--) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2758
    // Check the previous versions array for an info node that hasn't
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2759
    // been GC'ed
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2760
    PreviousVersionNode * pv_node = _previous_versions->at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2761
220
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2762
    jobject cp_ref = pv_node->prev_constant_pool();
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2763
    assert(cp_ref != NULL, "cp reference was unexpectedly cleared");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2764
    if (cp_ref == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2765
      continue;  // robustness
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2766
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2767
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2768
    constantPoolOop cp = (constantPoolOop)JNIHandles::resolve(cp_ref);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2769
    if (cp != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2770
      // we have at least one previous version
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2771
      return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2772
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2773
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2774
    // We don't have to check the method refs. If the constant pool has
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2775
    // been GC'ed then so have the methods.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2776
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2777
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2778
  // all of the underlying nodes' info has been GC'ed
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2779
  return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2780
} // end has_previous_version()
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2781
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2782
methodOop instanceKlass::method_with_idnum(int idnum) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2783
  methodOop m = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2784
  if (idnum < methods()->length()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2785
    m = (methodOop) methods()->obj_at(idnum);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2786
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2787
  if (m == NULL || m->method_idnum() != idnum) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2788
    for (int index = 0; index < methods()->length(); ++index) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2789
      m = (methodOop) methods()->obj_at(index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2790
      if (m->method_idnum() == idnum) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2791
        return m;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2792
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2793
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2794
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2795
  return m;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2796
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2797
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2798
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2799
// Set the annotation at 'idnum' to 'anno'.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2800
// We don't want to create or extend the array if 'anno' is NULL, since that is the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2801
// default value.  However, if the array exists and is long enough, we must set NULL values.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2802
void instanceKlass::set_methods_annotations_of(int idnum, typeArrayOop anno, objArrayOop* md_p) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2803
  objArrayOop md = *md_p;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2804
  if (md != NULL && md->length() > idnum) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2805
    md->obj_at_put(idnum, anno);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2806
  } else if (anno != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2807
    // create the array
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2808
    int length = MAX2(idnum+1, (int)_idnum_allocated_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2809
    md = oopFactory::new_system_objArray(length, Thread::current());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2810
    if (*md_p != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2811
      // copy the existing entries
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2812
      for (int index = 0; index < (*md_p)->length(); index++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2813
        md->obj_at_put(index, (*md_p)->obj_at(index));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2814
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2815
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2816
    set_annotations(md, md_p);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2817
    md->obj_at_put(idnum, anno);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2818
  } // if no array and idnum isn't included there is nothing to do
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2819
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2820
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2821
// Construct a PreviousVersionNode entry for the array hung off
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2822
// the instanceKlass.
220
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2823
PreviousVersionNode::PreviousVersionNode(jobject prev_constant_pool,
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2824
  bool prev_cp_is_weak, GrowableArray<jweak>* prev_EMCP_methods) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2825
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2826
  _prev_constant_pool = prev_constant_pool;
220
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2827
  _prev_cp_is_weak = prev_cp_is_weak;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2828
  _prev_EMCP_methods = prev_EMCP_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2829
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2830
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2831
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2832
// Destroy a PreviousVersionNode
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2833
PreviousVersionNode::~PreviousVersionNode() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2834
  if (_prev_constant_pool != NULL) {
220
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2835
    if (_prev_cp_is_weak) {
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2836
      JNIHandles::destroy_weak_global(_prev_constant_pool);
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2837
    } else {
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2838
      JNIHandles::destroy_global(_prev_constant_pool);
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2839
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2840
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2841
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2842
  if (_prev_EMCP_methods != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2843
    for (int i = _prev_EMCP_methods->length() - 1; i >= 0; i--) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2844
      jweak method_ref = _prev_EMCP_methods->at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2845
      if (method_ref != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2846
        JNIHandles::destroy_weak_global(method_ref);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2847
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2848
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2849
    delete _prev_EMCP_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2850
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2851
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2852
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2853
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2854
// Construct a PreviousVersionInfo entry
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2855
PreviousVersionInfo::PreviousVersionInfo(PreviousVersionNode *pv_node) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2856
  _prev_constant_pool_handle = constantPoolHandle();  // NULL handle
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2857
  _prev_EMCP_method_handles = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2858
220
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2859
  jobject cp_ref = pv_node->prev_constant_pool();
e6ef4818c49d 6497639: 4/3 Profiling Swing application caused JVM crash
dcubed
parents: 1
diff changeset
  2860
  assert(cp_ref != NULL, "constant pool ref was unexpectedly cleared");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2861
  if (cp_ref == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2862
    return;  // robustness
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2863
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2864
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2865
  constantPoolOop cp = (constantPoolOop)JNIHandles::resolve(cp_ref);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2866
  if (cp == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2867
    // Weak reference has been GC'ed. Since the constant pool has been
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2868
    // GC'ed, the methods have also been GC'ed.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2869
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2870
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2871
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2872
  // make the constantPoolOop safe to return
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2873
  _prev_constant_pool_handle = constantPoolHandle(cp);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2874
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2875
  GrowableArray<jweak>* method_refs = pv_node->prev_EMCP_methods();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2876
  if (method_refs == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2877
    // the instanceKlass did not have any EMCP methods
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2878
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2879
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2880
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2881
  _prev_EMCP_method_handles = new GrowableArray<methodHandle>(10);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2882
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2883
  int n_methods = method_refs->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2884
  for (int i = 0; i < n_methods; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2885
    jweak method_ref = method_refs->at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2886
    assert(method_ref != NULL, "weak method ref was unexpectedly cleared");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2887
    if (method_ref == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2888
      continue;  // robustness
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2889
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2890
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2891
    methodOop method = (methodOop)JNIHandles::resolve(method_ref);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2892
    if (method == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2893
      // this entry has been GC'ed so skip it
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2894
      continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2895
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2896
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2897
    // make the methodOop safe to return
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2898
    _prev_EMCP_method_handles->append(methodHandle(method));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2899
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2900
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2901
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2902
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2903
// Destroy a PreviousVersionInfo
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2904
PreviousVersionInfo::~PreviousVersionInfo() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2905
  // Since _prev_EMCP_method_handles is not C-heap allocated, we
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2906
  // don't have to delete it.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2907
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2908
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2909
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2910
// Construct a helper for walking the previous versions array
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2911
PreviousVersionWalker::PreviousVersionWalker(instanceKlass *ik) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2912
  _previous_versions = ik->previous_versions();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2913
  _current_index = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2914
  // _hm needs no initialization
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2915
  _current_p = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2916
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2917
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2918
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2919
// Destroy a PreviousVersionWalker
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2920
PreviousVersionWalker::~PreviousVersionWalker() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2921
  // Delete the current info just in case the caller didn't walk to
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2922
  // the end of the previous versions list. No harm if _current_p is
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2923
  // already NULL.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2924
  delete _current_p;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2925
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2926
  // When _hm is destroyed, all the Handles returned in
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2927
  // PreviousVersionInfo objects will be destroyed.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2928
  // Also, after this destructor is finished it will be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2929
  // safe to delete the GrowableArray allocated in the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2930
  // PreviousVersionInfo objects.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2931
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2932
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2933
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2934
// Return the interesting information for the next previous version
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2935
// of the klass. Returns NULL if there are no more previous versions.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2936
PreviousVersionInfo* PreviousVersionWalker::next_previous_version() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2937
  if (_previous_versions == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2938
    // no previous versions so nothing to return
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2939
    return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2940
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2941
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2942
  delete _current_p;  // cleanup the previous info for the caller
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2943
  _current_p = NULL;  // reset to NULL so we don't delete same object twice
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2944
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2945
  int length = _previous_versions->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2946
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2947
  while (_current_index < length) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2948
    PreviousVersionNode * pv_node = _previous_versions->at(_current_index++);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2949
    PreviousVersionInfo * pv_info = new (ResourceObj::C_HEAP)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2950
                                          PreviousVersionInfo(pv_node);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2951
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2952
    constantPoolHandle cp_h = pv_info->prev_constant_pool_handle();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2953
    if (cp_h.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2954
      delete pv_info;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2955
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2956
      // The underlying node's info has been GC'ed so try the next one.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2957
      // We don't have to check the methods. If the constant pool has
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2958
      // GC'ed then so have the methods.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2959
      continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2960
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2961
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2962
    // Found a node with non GC'ed info so return it. The caller will
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2963
    // need to delete pv_info when they are done with it.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2964
    _current_p = pv_info;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2965
    return pv_info;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2966
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2967
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2968
  // all of the underlying nodes' info has been GC'ed
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2969
  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2970
} // end next_previous_version()