hotspot/src/share/vm/classfile/systemDictionary.cpp
author jrose
Tue, 15 Sep 2009 21:53:47 -0700
changeset 3908 24b55ad4c228
parent 3575 224791e7ecab
child 3912 3aaaaad1ccb0
permissions -rw-r--r--
6863023: need non-perm oops in code cache for JSR 292 Summary: Make a special root-list for those few nmethods which might contain non-perm oops. Reviewed-by: twisti, kvn, never, jmasa, ysr
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/*
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 * Copyright 1997-2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 *
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 */
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# include "incls/_precompiled.incl"
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# include "incls/_systemDictionary.cpp.incl"
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Dictionary*       SystemDictionary::_dictionary = NULL;
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PlaceholderTable* SystemDictionary::_placeholders = NULL;
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Dictionary*       SystemDictionary::_shared_dictionary = NULL;
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LoaderConstraintTable* SystemDictionary::_loader_constraints = NULL;
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ResolutionErrorTable* SystemDictionary::_resolution_errors = NULL;
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SymbolPropertyTable* SystemDictionary::_invoke_method_table = NULL;
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int         SystemDictionary::_number_of_modifications = 0;
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oop         SystemDictionary::_system_loader_lock_obj     =  NULL;
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klassOop    SystemDictionary::_well_known_klasses[SystemDictionary::WKID_LIMIT]
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                                                          =  { NULL /*, NULL...*/ };
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klassOop    SystemDictionary::_box_klasses[T_VOID+1]      =  { NULL /*, NULL...*/ };
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oop         SystemDictionary::_java_system_loader         =  NULL;
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bool        SystemDictionary::_has_loadClassInternal      =  false;
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bool        SystemDictionary::_has_checkPackageAccess     =  false;
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// lazily initialized klass variables
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volatile klassOop    SystemDictionary::_abstract_ownable_synchronizer_klass = NULL;
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// ----------------------------------------------------------------------------
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// Java-level SystemLoader
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oop SystemDictionary::java_system_loader() {
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  return _java_system_loader;
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}
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void SystemDictionary::compute_java_system_loader(TRAPS) {
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  KlassHandle system_klass(THREAD, WK_KLASS(classloader_klass));
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  JavaValue result(T_OBJECT);
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  JavaCalls::call_static(&result,
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                         KlassHandle(THREAD, WK_KLASS(classloader_klass)),
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                         vmSymbolHandles::getSystemClassLoader_name(),
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                         vmSymbolHandles::void_classloader_signature(),
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                         CHECK);
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  _java_system_loader = (oop)result.get_jobject();
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}
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// ----------------------------------------------------------------------------
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// debugging
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#ifdef ASSERT
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// return true if class_name contains no '.' (internal format is '/')
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bool SystemDictionary::is_internal_format(symbolHandle class_name) {
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  if (class_name.not_null()) {
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    ResourceMark rm;
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    char* name = class_name->as_C_string();
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    return strchr(name, '.') == NULL;
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  } else {
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    return true;
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  }
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}
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#endif
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// ----------------------------------------------------------------------------
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// Parallel class loading check
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bool SystemDictionary::is_parallelCapable(Handle class_loader) {
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  if (UnsyncloadClass || class_loader.is_null()) return true;
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  if (AlwaysLockClassLoader) return false;
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  return java_lang_Class::parallelCapable(class_loader());
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}
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// ----------------------------------------------------------------------------
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// Resolving of classes
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// Forwards to resolve_or_null
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klassOop SystemDictionary::resolve_or_fail(symbolHandle class_name, Handle class_loader, Handle protection_domain, bool throw_error, TRAPS) {
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  klassOop klass = resolve_or_null(class_name, class_loader, protection_domain, THREAD);
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  if (HAS_PENDING_EXCEPTION || klass == NULL) {
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    KlassHandle k_h(THREAD, klass);
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    // can return a null klass
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    klass = handle_resolution_exception(class_name, class_loader, protection_domain, throw_error, k_h, THREAD);
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  }
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  return klass;
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}
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klassOop SystemDictionary::handle_resolution_exception(symbolHandle class_name, Handle class_loader, Handle protection_domain, bool throw_error, KlassHandle klass_h, TRAPS) {
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  if (HAS_PENDING_EXCEPTION) {
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    // If we have a pending exception we forward it to the caller, unless throw_error is true,
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    // in which case we have to check whether the pending exception is a ClassNotFoundException,
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    // and if so convert it to a NoClassDefFoundError
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    // And chain the original ClassNotFoundException
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    if (throw_error && PENDING_EXCEPTION->is_a(SystemDictionary::classNotFoundException_klass())) {
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      ResourceMark rm(THREAD);
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      assert(klass_h() == NULL, "Should not have result with exception pending");
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      Handle e(THREAD, PENDING_EXCEPTION);
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      CLEAR_PENDING_EXCEPTION;
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      THROW_MSG_CAUSE_0(vmSymbols::java_lang_NoClassDefFoundError(), class_name->as_C_string(), e);
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    } else {
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      return NULL;
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    }
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  }
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  // Class not found, throw appropriate error or exception depending on value of throw_error
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  if (klass_h() == NULL) {
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    ResourceMark rm(THREAD);
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    if (throw_error) {
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      THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), class_name->as_C_string());
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    } else {
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      THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), class_name->as_C_string());
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    }
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  }
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  return (klassOop)klass_h();
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}
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klassOop SystemDictionary::resolve_or_fail(symbolHandle class_name,
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                                           bool throw_error, TRAPS)
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{
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  return resolve_or_fail(class_name, Handle(), Handle(), throw_error, THREAD);
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}
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// Forwards to resolve_instance_class_or_null
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klassOop SystemDictionary::resolve_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS) {
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  assert(!THREAD->is_Compiler_thread(), "Can not load classes with the Compiler thread");
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  if (FieldType::is_array(class_name())) {
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    return resolve_array_class_or_null(class_name, class_loader, protection_domain, CHECK_NULL);
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  } else {
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    return resolve_instance_class_or_null(class_name, class_loader, protection_domain, CHECK_NULL);
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  }
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}
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klassOop SystemDictionary::resolve_or_null(symbolHandle class_name, TRAPS) {
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  return resolve_or_null(class_name, Handle(), Handle(), THREAD);
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}
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// Forwards to resolve_instance_class_or_null
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klassOop SystemDictionary::resolve_array_class_or_null(symbolHandle class_name,
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                                                       Handle class_loader,
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                                                       Handle protection_domain,
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                                                       TRAPS) {
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  assert(FieldType::is_array(class_name()), "must be array");
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  jint dimension;
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  symbolOop object_key;
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  klassOop k = NULL;
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  // dimension and object_key are assigned as a side-effect of this call
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  BasicType t = FieldType::get_array_info(class_name(),
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                                          &dimension,
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                                          &object_key,
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                                          CHECK_NULL);
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  if (t == T_OBJECT) {
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    symbolHandle h_key(THREAD, object_key);
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    // naked oop "k" is OK here -- we assign back into it
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    k = SystemDictionary::resolve_instance_class_or_null(h_key,
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                                                         class_loader,
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                                                         protection_domain,
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                                                         CHECK_NULL);
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    if (k != NULL) {
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      k = Klass::cast(k)->array_klass(dimension, CHECK_NULL);
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    }
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  } else {
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    k = Universe::typeArrayKlassObj(t);
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    k = typeArrayKlass::cast(k)->array_klass(dimension, CHECK_NULL);
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  }
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  return k;
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}
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// Must be called for any super-class or super-interface resolution
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// during class definition to allow class circularity checking
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// super-interface callers:
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//    parse_interfaces - for defineClass & jvmtiRedefineClasses
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// super-class callers:
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//   ClassFileParser - for defineClass & jvmtiRedefineClasses
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//   load_shared_class - while loading a class from shared archive
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//   resolve_instance_class_or_null:
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//     via: handle_parallel_super_load
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//      when resolving a class that has an existing placeholder with
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//      a saved superclass [i.e. a defineClass is currently in progress]
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//      if another thread is trying to resolve the class, it must do
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//      super-class checks on its own thread to catch class circularity
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// This last call is critical in class circularity checking for cases
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// where classloading is delegated to different threads and the
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// classloader lock is released.
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// Take the case: Base->Super->Base
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//   1. If thread T1 tries to do a defineClass of class Base
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//    resolve_super_or_fail creates placeholder: T1, Base (super Super)
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//   2. resolve_instance_class_or_null does not find SD or placeholder for Super
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//    so it tries to load Super
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//   3. If we load the class internally, or user classloader uses same thread
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//      loadClassFromxxx or defineClass via parseClassFile Super ...
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//      3.1 resolve_super_or_fail creates placeholder: T1, Super (super Base)
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//      3.3 resolve_instance_class_or_null Base, finds placeholder for Base
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//      3.4 calls resolve_super_or_fail Base
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//      3.5 finds T1,Base -> throws class circularity
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//OR 4. If T2 tries to resolve Super via defineClass Super ...
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//      4.1 resolve_super_or_fail creates placeholder: T2, Super (super Base)
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//      4.2 resolve_instance_class_or_null Base, finds placeholder for Base (super Super)
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//      4.3 calls resolve_super_or_fail Super in parallel on own thread T2
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//      4.4 finds T2, Super -> throws class circularity
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// Must be called, even if superclass is null, since this is
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// where the placeholder entry is created which claims this
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// thread is loading this class/classloader.
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klassOop SystemDictionary::resolve_super_or_fail(symbolHandle child_name,
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                                                 symbolHandle class_name,
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                                                 Handle class_loader,
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                                                 Handle protection_domain,
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                                                 bool is_superclass,
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                                                 TRAPS) {
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  // Try to get one of the well-known klasses.
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  // They are trusted, and do not participate in circularities.
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  if (LinkWellKnownClasses) {
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    klassOop k = find_well_known_klass(class_name());
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    if (k != NULL) {
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      return k;
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    }
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  }
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  // Double-check, if child class is already loaded, just return super-class,interface
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  // Don't add a placedholder if already loaded, i.e. already in system dictionary
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  // Make sure there's a placeholder for the *child* before resolving.
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  // Used as a claim that this thread is currently loading superclass/classloader
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  // Used here for ClassCircularity checks and also for heap verification
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  // (every instanceKlass in the heap needs to be in the system dictionary
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  // or have a placeholder).
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  // Must check ClassCircularity before checking if super class is already loaded
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  //
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  // We might not already have a placeholder if this child_name was
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  // first seen via resolve_from_stream (jni_DefineClass or JVM_DefineClass);
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  // the name of the class might not be known until the stream is actually
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  // parsed.
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  // Bugs 4643874, 4715493
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  // compute_hash can have a safepoint
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  unsigned int d_hash = dictionary()->compute_hash(child_name, class_loader);
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  int d_index = dictionary()->hash_to_index(d_hash);
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  unsigned int p_hash = placeholders()->compute_hash(child_name, class_loader);
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  int p_index = placeholders()->hash_to_index(p_hash);
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  // can't throw error holding a lock
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  bool child_already_loaded = false;
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  bool throw_circularity_error = false;
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  {
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    MutexLocker mu(SystemDictionary_lock, THREAD);
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    klassOop childk = find_class(d_index, d_hash, child_name, class_loader);
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    klassOop quicksuperk;
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    // to support // loading: if child done loading, just return superclass
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    // if class_name, & class_loader don't match:
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    // if initial define, SD update will give LinkageError
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    // if redefine: compare_class_versions will give HIERARCHY_CHANGED
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    // so we don't throw an exception here.
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    // see: nsk redefclass014 & java.lang.instrument Instrument032
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    if ((childk != NULL ) && (is_superclass) &&
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       ((quicksuperk = instanceKlass::cast(childk)->super()) != NULL) &&
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         ((Klass::cast(quicksuperk)->name() == class_name()) &&
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            (Klass::cast(quicksuperk)->class_loader()  == class_loader()))) {
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           return quicksuperk;
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    } else {
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      PlaceholderEntry* probe = placeholders()->get_entry(p_index, p_hash, child_name, class_loader);
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      if (probe && probe->check_seen_thread(THREAD, PlaceholderTable::LOAD_SUPER)) {
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          throw_circularity_error = true;
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      }
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    }
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    if (!throw_circularity_error) {
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      PlaceholderEntry* newprobe = placeholders()->find_and_add(p_index, p_hash, child_name, class_loader, PlaceholderTable::LOAD_SUPER, class_name, THREAD);
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    }
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  }
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  if (throw_circularity_error) {
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      ResourceMark rm(THREAD);
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      THROW_MSG_0(vmSymbols::java_lang_ClassCircularityError(), child_name->as_C_string());
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  }
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// java.lang.Object should have been found above
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  assert(class_name() != NULL, "null super class for resolving");
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  // Resolve the super class or interface, check results on return
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  klassOop superk = NULL;
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  superk = SystemDictionary::resolve_or_null(class_name,
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                                                 class_loader,
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                                                 protection_domain,
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                                                 THREAD);
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  KlassHandle superk_h(THREAD, superk);
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  // Note: clean up of placeholders currently in callers of
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  // resolve_super_or_fail - either at update_dictionary time
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  // or on error
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  {
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  MutexLocker mu(SystemDictionary_lock, THREAD);
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   PlaceholderEntry* probe = placeholders()->get_entry(p_index, p_hash, child_name, class_loader);
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   if (probe != NULL) {
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      probe->remove_seen_thread(THREAD, PlaceholderTable::LOAD_SUPER);
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   }
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  }
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  if (HAS_PENDING_EXCEPTION || superk_h() == NULL) {
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    // can null superk
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    superk_h = KlassHandle(THREAD, handle_resolution_exception(class_name, class_loader, protection_domain, true, superk_h, THREAD));
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  }
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  return superk_h();
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}
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void SystemDictionary::validate_protection_domain(instanceKlassHandle klass,
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                                                  Handle class_loader,
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                                                  Handle protection_domain,
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                                                  TRAPS) {
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  if(!has_checkPackageAccess()) return;
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  // Now we have to call back to java to check if the initating class has access
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  JavaValue result(T_VOID);
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  if (TraceProtectionDomainVerification) {
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    // Print out trace information
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    tty->print_cr("Checking package access");
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    tty->print(" - class loader:      "); class_loader()->print_value_on(tty);      tty->cr();
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    tty->print(" - protection domain: "); protection_domain()->print_value_on(tty); tty->cr();
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    tty->print(" - loading:           "); klass()->print_value_on(tty);             tty->cr();
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  }
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  assert(class_loader() != NULL, "should not have non-null protection domain for null classloader");
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  KlassHandle system_loader(THREAD, SystemDictionary::classloader_klass());
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  JavaCalls::call_special(&result,
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                         class_loader,
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                         system_loader,
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                         vmSymbolHandles::checkPackageAccess_name(),
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                         vmSymbolHandles::class_protectiondomain_signature(),
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                         Handle(THREAD, klass->java_mirror()),
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                         protection_domain,
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                         THREAD);
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  if (TraceProtectionDomainVerification) {
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   364
    if (HAS_PENDING_EXCEPTION) {
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   365
      tty->print_cr(" -> DENIED !!!!!!!!!!!!!!!!!!!!!");
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    } else {
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     tty->print_cr(" -> granted");
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    }
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    tty->cr();
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  }
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  if (HAS_PENDING_EXCEPTION) return;
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  // If no exception has been thrown, we have validated the protection domain
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  // Insert the protection domain of the initiating class into the set.
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  {
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    // We recalculate the entry here -- we've called out to java since
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    // the last time it was calculated.
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    symbolHandle kn(THREAD, klass->name());
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    unsigned int d_hash = dictionary()->compute_hash(kn, class_loader);
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    int d_index = dictionary()->hash_to_index(d_hash);
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diff changeset
   382
489c9b5090e2 Initial load
duke
parents:
diff changeset
   383
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   384
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   385
      // Note that we have an entry, and entries can be deleted only during GC,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   386
      // so we cannot allow GC to occur while we're holding this entry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   387
489c9b5090e2 Initial load
duke
parents:
diff changeset
   388
      // We're using a No_Safepoint_Verifier to catch any place where we
489c9b5090e2 Initial load
duke
parents:
diff changeset
   389
      // might potentially do a GC at all.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   390
      // SystemDictionary::do_unloading() asserts that classes are only
489c9b5090e2 Initial load
duke
parents:
diff changeset
   391
      // unloaded at a safepoint.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   392
      No_Safepoint_Verifier nosafepoint;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   393
      dictionary()->add_protection_domain(d_index, d_hash, klass, class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   394
                                          protection_domain, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   395
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   396
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   397
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   398
489c9b5090e2 Initial load
duke
parents:
diff changeset
   399
// We only get here if this thread finds that another thread
489c9b5090e2 Initial load
duke
parents:
diff changeset
   400
// has already claimed the placeholder token for the current operation,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   401
// but that other thread either never owned or gave up the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   402
// object lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   403
// Waits on SystemDictionary_lock to indicate placeholder table updated
489c9b5090e2 Initial load
duke
parents:
diff changeset
   404
// On return, caller must recheck placeholder table state
489c9b5090e2 Initial load
duke
parents:
diff changeset
   405
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   406
// We only get here if
489c9b5090e2 Initial load
duke
parents:
diff changeset
   407
//  1) custom classLoader, i.e. not bootstrap classloader
489c9b5090e2 Initial load
duke
parents:
diff changeset
   408
//  2) UnsyncloadClass not set
489c9b5090e2 Initial load
duke
parents:
diff changeset
   409
//  3) custom classLoader has broken the class loader objectLock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   410
//     so another thread got here in parallel
489c9b5090e2 Initial load
duke
parents:
diff changeset
   411
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   412
// lockObject must be held.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   413
// Complicated dance due to lock ordering:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   414
// Must first release the classloader object lock to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   415
// allow initial definer to complete the class definition
489c9b5090e2 Initial load
duke
parents:
diff changeset
   416
// and to avoid deadlock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   417
// Reclaim classloader lock object with same original recursion count
489c9b5090e2 Initial load
duke
parents:
diff changeset
   418
// Must release SystemDictionary_lock after notify, since
489c9b5090e2 Initial load
duke
parents:
diff changeset
   419
// class loader lock must be claimed before SystemDictionary_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   420
// to prevent deadlocks
489c9b5090e2 Initial load
duke
parents:
diff changeset
   421
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
// The notify allows applications that did an untimed wait() on
489c9b5090e2 Initial load
duke
parents:
diff changeset
   423
// the classloader object lock to not hang.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   424
void SystemDictionary::double_lock_wait(Handle lockObject, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   425
  assert_lock_strong(SystemDictionary_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   426
489c9b5090e2 Initial load
duke
parents:
diff changeset
   427
  bool calledholdinglock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   428
      = ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, lockObject);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   429
  assert(calledholdinglock,"must hold lock for notify");
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   430
  assert((!(lockObject() == _system_loader_lock_obj) && !is_parallelCapable(lockObject)), "unexpected double_lock_wait");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   431
  ObjectSynchronizer::notifyall(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   432
  intptr_t recursions =  ObjectSynchronizer::complete_exit(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   433
  SystemDictionary_lock->wait();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
  SystemDictionary_lock->unlock();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
  ObjectSynchronizer::reenter(lockObject, recursions, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   436
  SystemDictionary_lock->lock();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   437
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   438
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
// If the class in is in the placeholder table, class loading is in progress
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
// For cases where the application changes threads to load classes, it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
// is critical to ClassCircularity detection that we try loading
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
// the superclass on the same thread internally, so we do parallel
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
// super class loading here.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
// This also is critical in cases where the original thread gets stalled
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
// even in non-circularity situations.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   446
// Note: only one thread can define the class, but multiple can resolve
489c9b5090e2 Initial load
duke
parents:
diff changeset
   447
// Note: must call resolve_super_or_fail even if null super -
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   448
// to force placeholder entry creation for this class for circularity detection
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
// Caller must check for pending exception
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
// Returns non-null klassOop if other thread has completed load
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
// and we are done,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   452
// If return null klassOop and no pending exception, the caller must load the class
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
instanceKlassHandle SystemDictionary::handle_parallel_super_load(
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
    symbolHandle name, symbolHandle superclassname, Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   455
    Handle protection_domain, Handle lockObject, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
  instanceKlassHandle nh = instanceKlassHandle(); // null Handle
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
  unsigned int d_hash = dictionary()->compute_hash(name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
  int d_index = dictionary()->hash_to_index(d_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
  unsigned int p_hash = placeholders()->compute_hash(name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   461
  int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
  // superk is not used, resolve_super called for circularity check only
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
  // This code is reached in two situations. One if this thread
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
  // is loading the same class twice (e.g. ClassCircularity, or
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
  // java.lang.instrument).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
  // The second is if another thread started the resolve_super first
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
  // and has not yet finished.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
  // In both cases the original caller will clean up the placeholder
489c9b5090e2 Initial load
duke
parents:
diff changeset
   470
  // entry on error.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
  klassOop superk = SystemDictionary::resolve_super_or_fail(name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   472
                                                          superclassname,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
                                                          class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   474
                                                          protection_domain,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
                                                          true,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   476
                                                          CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   477
  // We don't redefine the class, so we just need to clean up if there
489c9b5090e2 Initial load
duke
parents:
diff changeset
   478
  // was not an error (don't want to modify any system dictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
   479
  // data structures).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   480
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   481
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   482
    placeholders()->find_and_remove(p_index, p_hash, name, class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   483
    SystemDictionary_lock->notify_all();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   484
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   485
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   486
  // parallelCapable class loaders do NOT wait for parallel superclass loads to complete
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   487
  // Serial class loaders and bootstrap classloader do wait for superclass loads
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   488
 if (!class_loader.is_null() && is_parallelCapable(class_loader)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   489
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
    // Check if classloading completed while we were loading superclass or waiting
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
    klassOop check = find_class(d_index, d_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   492
    if (check != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   493
      // Klass is already loaded, so just return it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   494
      return(instanceKlassHandle(THREAD, check));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
      return nh;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   497
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   498
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
  // must loop to both handle other placeholder updates
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
  // and spurious notifications
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
  bool super_load_in_progress = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
  PlaceholderEntry* placeholder;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
  while (super_load_in_progress) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
    // Check if classloading completed while we were loading superclass or waiting
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
    klassOop check = find_class(d_index, d_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
    if (check != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
      // Klass is already loaded, so just return it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
      return(instanceKlassHandle(THREAD, check));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
      placeholder = placeholders()->get_entry(p_index, p_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
      if (placeholder && placeholder->super_load_in_progress() ){
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
        // Before UnsyncloadClass:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
        // We only get here if the application has released the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
        // classloader lock when another thread was in the middle of loading a
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
        // superclass/superinterface for this class, and now
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
        // this thread is also trying to load this class.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
        // To minimize surprises, the first thread that started to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
        // load a class should be the one to complete the loading
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
        // with the classfile it initially expected.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
        // This logic has the current thread wait once it has done
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
        // all the superclass/superinterface loading it can, until
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
        // the original thread completes the class loading or fails
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
        // If it completes we will use the resulting instanceKlass
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
        // which we will find below in the systemDictionary.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
        // We also get here for parallel bootstrap classloader
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
        if (class_loader.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
          SystemDictionary_lock->wait();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
        } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
          double_lock_wait(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
        // If not in SD and not in PH, other thread's load must have failed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
        super_load_in_progress = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
  return (nh);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
klassOop SystemDictionary::resolve_instance_class_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
  assert(class_name.not_null() && !FieldType::is_array(class_name()), "invalid class name");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
  // First check to see if we should remove wrapping L and ;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
  symbolHandle name;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
  if (FieldType::is_obj(class_name())) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
    ResourceMark rm(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
    // Ignore wrapping L and ;.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
    name = oopFactory::new_symbol_handle(class_name()->as_C_string() + 1, class_name()->utf8_length() - 2, CHECK_NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
    name = class_name;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   554
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
  // UseNewReflection
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
  // Fix for 4474172; see evaluation for more details
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
  class_loader = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(class_loader()));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
  // Do lookup to see if class already exist and the protection domain
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
  // has the right access
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
  unsigned int d_hash = dictionary()->compute_hash(name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   562
  int d_index = dictionary()->hash_to_index(d_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
  klassOop probe = dictionary()->find(d_index, d_hash, name, class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
                                      protection_domain, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
  if (probe != NULL) return probe;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
489c9b5090e2 Initial load
duke
parents:
diff changeset
   567
489c9b5090e2 Initial load
duke
parents:
diff changeset
   568
  // Non-bootstrap class loaders will call out to class loader and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
  // define via jvm/jni_DefineClass which will acquire the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   570
  // class loader object lock to protect against multiple threads
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
  // defining the class in parallel by accident.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   572
  // This lock must be acquired here so the waiter will find
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
  // any successful result in the SystemDictionary and not attempt
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
  // the define
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   575
  // ParallelCapable Classloaders and the bootstrap classloader,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
  // or all classloaders with UnsyncloadClass do not acquire lock here
489c9b5090e2 Initial load
duke
parents:
diff changeset
   577
  bool DoObjectLock = true;
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   578
  if (is_parallelCapable(class_loader)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   579
    DoObjectLock = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
  unsigned int p_hash = placeholders()->compute_hash(name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
  int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
  // Class is not in SystemDictionary so we have to do loading.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   586
  // Make sure we are synchronized on the class loader before we proceed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
  Handle lockObject = compute_loader_lock_object(class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
  check_loader_lock_contention(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
  ObjectLocker ol(lockObject, THREAD, DoObjectLock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
  // Check again (after locking) if class already exist in SystemDictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
   592
  bool class_has_been_loaded   = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
  bool super_load_in_progress  = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
  bool havesupername = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   595
  instanceKlassHandle k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
  PlaceholderEntry* placeholder;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
  symbolHandle superclassname;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   598
489c9b5090e2 Initial load
duke
parents:
diff changeset
   599
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   600
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   601
    klassOop check = find_class(d_index, d_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   602
    if (check != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   603
      // Klass is already loaded, so just return it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   604
      class_has_been_loaded = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
      k = instanceKlassHandle(THREAD, check);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   606
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
      placeholder = placeholders()->get_entry(p_index, p_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
      if (placeholder && placeholder->super_load_in_progress()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
         super_load_in_progress = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   610
         if (placeholder->havesupername() == true) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
           superclassname = symbolHandle(THREAD, placeholder->supername());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
           havesupername = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
         }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   616
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   617
489c9b5090e2 Initial load
duke
parents:
diff changeset
   618
  // If the class in is in the placeholder table, class loading is in progress
489c9b5090e2 Initial load
duke
parents:
diff changeset
   619
  if (super_load_in_progress && havesupername==true) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   620
    k = SystemDictionary::handle_parallel_super_load(name, superclassname,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
        class_loader, protection_domain, lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   622
    if (HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
      return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
    if (!k.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   626
      class_has_been_loaded = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   627
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   629
489c9b5090e2 Initial load
duke
parents:
diff changeset
   630
  if (!class_has_been_loaded) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   631
489c9b5090e2 Initial load
duke
parents:
diff changeset
   632
    // add placeholder entry to record loading instance class
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
    // Five cases:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   634
    // All cases need to prevent modifying bootclasssearchpath
489c9b5090e2 Initial load
duke
parents:
diff changeset
   635
    // in parallel with a classload of same classname
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   636
    // Redefineclasses uses existence of the placeholder for the duration
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   637
    // of the class load to prevent concurrent redefinition of not completely
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   638
    // defined classes.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
    // case 1. traditional classloaders that rely on the classloader object lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   640
    //   - no other need for LOAD_INSTANCE
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
    // case 2. traditional classloaders that break the classloader object lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
    //    as a deadlock workaround. Detection of this case requires that
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
    //    this check is done while holding the classloader object lock,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   644
    //    and that lock is still held when calling classloader's loadClass.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
    //    For these classloaders, we ensure that the first requestor
489c9b5090e2 Initial load
duke
parents:
diff changeset
   646
    //    completes the load and other requestors wait for completion.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   647
    // case 3. UnsyncloadClass - don't use objectLocker
489c9b5090e2 Initial load
duke
parents:
diff changeset
   648
    //    With this flag, we allow parallel classloading of a
489c9b5090e2 Initial load
duke
parents:
diff changeset
   649
    //    class/classloader pair
489c9b5090e2 Initial load
duke
parents:
diff changeset
   650
    // case4. Bootstrap classloader - don't own objectLocker
489c9b5090e2 Initial load
duke
parents:
diff changeset
   651
    //    This classloader supports parallelism at the classloader level,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   652
    //    but only allows a single load of a class/classloader pair.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   653
    //    No performance benefit and no deadlock issues.
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   654
    // case 5. parallelCapable user level classloaders - without objectLocker
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   655
    //    Allow parallel classloading of a class/classloader pair
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   656
    symbolHandle nullsymbolHandle;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   657
    bool throw_circularity_error = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   658
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   659
      MutexLocker mu(SystemDictionary_lock, THREAD);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   660
      if (class_loader.is_null() || !is_parallelCapable(class_loader)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   661
        PlaceholderEntry* oldprobe = placeholders()->get_entry(p_index, p_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   662
        if (oldprobe) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   663
          // only need check_seen_thread once, not on each loop
489c9b5090e2 Initial load
duke
parents:
diff changeset
   664
          // 6341374 java/lang/Instrument with -Xcomp
489c9b5090e2 Initial load
duke
parents:
diff changeset
   665
          if (oldprobe->check_seen_thread(THREAD, PlaceholderTable::LOAD_INSTANCE)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   666
            throw_circularity_error = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   667
          } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   668
            // case 1: traditional: should never see load_in_progress.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   669
            while (!class_has_been_loaded && oldprobe && oldprobe->instance_load_in_progress()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   670
489c9b5090e2 Initial load
duke
parents:
diff changeset
   671
              // case 4: bootstrap classloader: prevent futile classloading,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   672
              // wait on first requestor
489c9b5090e2 Initial load
duke
parents:
diff changeset
   673
              if (class_loader.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   674
                SystemDictionary_lock->wait();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   675
              } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   676
              // case 2: traditional with broken classloader lock. wait on first
489c9b5090e2 Initial load
duke
parents:
diff changeset
   677
              // requestor.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   678
                double_lock_wait(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   679
              }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   680
              // Check if classloading completed while we were waiting
489c9b5090e2 Initial load
duke
parents:
diff changeset
   681
              klassOop check = find_class(d_index, d_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   682
              if (check != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   683
                // Klass is already loaded, so just return it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   684
                k = instanceKlassHandle(THREAD, check);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   685
                class_has_been_loaded = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   686
              }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   687
              // check if other thread failed to load and cleaned up
489c9b5090e2 Initial load
duke
parents:
diff changeset
   688
              oldprobe = placeholders()->get_entry(p_index, p_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   689
            }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   690
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   691
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   692
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   693
      // All cases: add LOAD_INSTANCE
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   694
      // case 3: UnsyncloadClass || case 5: parallelCapable: allow competing threads to try
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   695
      // LOAD_INSTANCE in parallel
489c9b5090e2 Initial load
duke
parents:
diff changeset
   696
      // add placeholder entry even if error - callers will remove on error
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   697
      if (!throw_circularity_error && !class_has_been_loaded) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   698
        PlaceholderEntry* newprobe = placeholders()->find_and_add(p_index, p_hash, name, class_loader, PlaceholderTable::LOAD_INSTANCE, nullsymbolHandle, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   699
        // For class loaders that do not acquire the classloader object lock,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   700
        // if they did not catch another thread holding LOAD_INSTANCE,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   701
        // need a check analogous to the acquire ObjectLocker/find_class
489c9b5090e2 Initial load
duke
parents:
diff changeset
   702
        // i.e. now that we hold the LOAD_INSTANCE token on loading this class/CL
489c9b5090e2 Initial load
duke
parents:
diff changeset
   703
        // one final check if the load has already completed
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   704
        // class loaders holding the ObjectLock shouldn't find the class here
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   705
        klassOop check = find_class(d_index, d_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   706
        if (check != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   707
        // Klass is already loaded, so just return it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   708
          k = instanceKlassHandle(THREAD, check);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   709
          class_has_been_loaded = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   710
          newprobe->remove_seen_thread(THREAD, PlaceholderTable::LOAD_INSTANCE);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   711
          placeholders()->find_and_remove(p_index, p_hash, name, class_loader, THREAD);
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   712
          SystemDictionary_lock->notify_all();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   713
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   714
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   715
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   716
    // must throw error outside of owning lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   717
    if (throw_circularity_error) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   718
      ResourceMark rm(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   719
      THROW_MSG_0(vmSymbols::java_lang_ClassCircularityError(), name->as_C_string());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   720
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   721
489c9b5090e2 Initial load
duke
parents:
diff changeset
   722
    if (!class_has_been_loaded) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   723
489c9b5090e2 Initial load
duke
parents:
diff changeset
   724
      // Do actual loading
489c9b5090e2 Initial load
duke
parents:
diff changeset
   725
      k = load_instance_class(name, class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   726
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   727
      // For UnsyncloadClass and AllowParallelDefineClass only:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   728
      // If they got a linkageError, check if a parallel class load succeeded.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   729
      // If it did, then for bytecode resolution the specification requires
489c9b5090e2 Initial load
duke
parents:
diff changeset
   730
      // that we return the same result we did for the other thread, i.e. the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   731
      // successfully loaded instanceKlass
489c9b5090e2 Initial load
duke
parents:
diff changeset
   732
      // Should not get here for classloaders that support parallelism
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   733
      // with the new cleaner mechanism
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   734
      // Bootstrap goes through here to allow for an extra guarantee check
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   735
      if (UnsyncloadClass || (class_loader.is_null())) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   736
        if (k.is_null() && HAS_PENDING_EXCEPTION
489c9b5090e2 Initial load
duke
parents:
diff changeset
   737
          && PENDING_EXCEPTION->is_a(SystemDictionary::linkageError_klass())) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   738
          MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   739
          klassOop check = find_class(d_index, d_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   740
          if (check != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   741
            // Klass is already loaded, so just use it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   742
            k = instanceKlassHandle(THREAD, check);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   743
            CLEAR_PENDING_EXCEPTION;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   744
            guarantee((!class_loader.is_null()), "dup definition for bootstrap loader?");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   745
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   746
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   747
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   748
489c9b5090e2 Initial load
duke
parents:
diff changeset
   749
      // clean up placeholder entries for success or error
489c9b5090e2 Initial load
duke
parents:
diff changeset
   750
      // This cleans up LOAD_INSTANCE entries
489c9b5090e2 Initial load
duke
parents:
diff changeset
   751
      // It also cleans up LOAD_SUPER entries on errors from
489c9b5090e2 Initial load
duke
parents:
diff changeset
   752
      // calling load_instance_class
489c9b5090e2 Initial load
duke
parents:
diff changeset
   753
      {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   754
        MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   755
        PlaceholderEntry* probe = placeholders()->get_entry(p_index, p_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   756
        if (probe != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   757
          probe->remove_seen_thread(THREAD, PlaceholderTable::LOAD_INSTANCE);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   758
          placeholders()->find_and_remove(p_index, p_hash, name, class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   759
          SystemDictionary_lock->notify_all();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   760
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   761
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   762
489c9b5090e2 Initial load
duke
parents:
diff changeset
   763
      // If everything was OK (no exceptions, no null return value), and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   764
      // class_loader is NOT the defining loader, do a little more bookkeeping.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   765
      if (!HAS_PENDING_EXCEPTION && !k.is_null() &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
   766
        k->class_loader() != class_loader()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   767
489c9b5090e2 Initial load
duke
parents:
diff changeset
   768
        check_constraints(d_index, d_hash, k, class_loader, false, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   769
489c9b5090e2 Initial load
duke
parents:
diff changeset
   770
        // Need to check for a PENDING_EXCEPTION again; check_constraints
489c9b5090e2 Initial load
duke
parents:
diff changeset
   771
        // can throw and doesn't use the CHECK macro.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   772
        if (!HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   773
          { // Grabbing the Compile_lock prevents systemDictionary updates
489c9b5090e2 Initial load
duke
parents:
diff changeset
   774
            // during compilations.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   775
            MutexLocker mu(Compile_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   776
            update_dictionary(d_index, d_hash, p_index, p_hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   777
                            k, class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   778
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   779
          if (JvmtiExport::should_post_class_load()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   780
            Thread *thread = THREAD;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   781
            assert(thread->is_Java_thread(), "thread->is_Java_thread()");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   782
            JvmtiExport::post_class_load((JavaThread *) thread, k());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   783
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   784
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   785
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   786
      if (HAS_PENDING_EXCEPTION || k.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   787
        // On error, clean up placeholders
489c9b5090e2 Initial load
duke
parents:
diff changeset
   788
        {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   789
          MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   790
          placeholders()->find_and_remove(p_index, p_hash, name, class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   791
          SystemDictionary_lock->notify_all();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   792
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   793
        return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   794
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   795
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   796
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   797
489c9b5090e2 Initial load
duke
parents:
diff changeset
   798
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   799
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   800
    Handle loader (THREAD, k->class_loader());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   801
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   802
    oop kk = find_class_or_placeholder(name, loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   803
    assert(kk == k(), "should be present in dictionary");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   804
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   805
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   806
489c9b5090e2 Initial load
duke
parents:
diff changeset
   807
  // return if the protection domain in NULL
489c9b5090e2 Initial load
duke
parents:
diff changeset
   808
  if (protection_domain() == NULL) return k();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   809
489c9b5090e2 Initial load
duke
parents:
diff changeset
   810
  // Check the protection domain has the right access
489c9b5090e2 Initial load
duke
parents:
diff changeset
   811
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   812
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   813
    // Note that we have an entry, and entries can be deleted only during GC,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   814
    // so we cannot allow GC to occur while we're holding this entry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   815
    // We're using a No_Safepoint_Verifier to catch any place where we
489c9b5090e2 Initial load
duke
parents:
diff changeset
   816
    // might potentially do a GC at all.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   817
    // SystemDictionary::do_unloading() asserts that classes are only
489c9b5090e2 Initial load
duke
parents:
diff changeset
   818
    // unloaded at a safepoint.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   819
    No_Safepoint_Verifier nosafepoint;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   820
    if (dictionary()->is_valid_protection_domain(d_index, d_hash, name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   821
                                                 class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   822
                                                 protection_domain)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   823
      return k();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   824
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   825
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   826
489c9b5090e2 Initial load
duke
parents:
diff changeset
   827
  // Verify protection domain. If it fails an exception is thrown
489c9b5090e2 Initial load
duke
parents:
diff changeset
   828
  validate_protection_domain(k, class_loader, protection_domain, CHECK_(klassOop(NULL)));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   829
489c9b5090e2 Initial load
duke
parents:
diff changeset
   830
  return k();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   831
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   832
489c9b5090e2 Initial load
duke
parents:
diff changeset
   833
489c9b5090e2 Initial load
duke
parents:
diff changeset
   834
// This routine does not lock the system dictionary.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   835
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   836
// Since readers don't hold a lock, we must make sure that system
489c9b5090e2 Initial load
duke
parents:
diff changeset
   837
// dictionary entries are only removed at a safepoint (when only one
489c9b5090e2 Initial load
duke
parents:
diff changeset
   838
// thread is running), and are added to in a safe way (all links must
489c9b5090e2 Initial load
duke
parents:
diff changeset
   839
// be updated in an MT-safe manner).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   840
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   841
// Callers should be aware that an entry could be added just after
489c9b5090e2 Initial load
duke
parents:
diff changeset
   842
// _dictionary->bucket(index) is read here, so the caller will not see
489c9b5090e2 Initial load
duke
parents:
diff changeset
   843
// the new entry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   844
489c9b5090e2 Initial load
duke
parents:
diff changeset
   845
klassOop SystemDictionary::find(symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   846
                                Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   847
                                Handle protection_domain,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   848
                                TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   849
2020
68d27ca96f33 6790209: server VM fails with assert(will_link,"_new: typeflow responsibility")
kvn
parents: 1550
diff changeset
   850
  // UseNewReflection
68d27ca96f33 6790209: server VM fails with assert(will_link,"_new: typeflow responsibility")
kvn
parents: 1550
diff changeset
   851
  // The result of this call should be consistent with the result
68d27ca96f33 6790209: server VM fails with assert(will_link,"_new: typeflow responsibility")
kvn
parents: 1550
diff changeset
   852
  // of the call to resolve_instance_class_or_null().
68d27ca96f33 6790209: server VM fails with assert(will_link,"_new: typeflow responsibility")
kvn
parents: 1550
diff changeset
   853
  // See evaluation 6790209 and 4474172 for more details.
68d27ca96f33 6790209: server VM fails with assert(will_link,"_new: typeflow responsibility")
kvn
parents: 1550
diff changeset
   854
  class_loader = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(class_loader()));
68d27ca96f33 6790209: server VM fails with assert(will_link,"_new: typeflow responsibility")
kvn
parents: 1550
diff changeset
   855
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   856
  unsigned int d_hash = dictionary()->compute_hash(class_name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   857
  int d_index = dictionary()->hash_to_index(d_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   858
489c9b5090e2 Initial load
duke
parents:
diff changeset
   859
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   860
    // Note that we have an entry, and entries can be deleted only during GC,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   861
    // so we cannot allow GC to occur while we're holding this entry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   862
    // We're using a No_Safepoint_Verifier to catch any place where we
489c9b5090e2 Initial load
duke
parents:
diff changeset
   863
    // might potentially do a GC at all.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   864
    // SystemDictionary::do_unloading() asserts that classes are only
489c9b5090e2 Initial load
duke
parents:
diff changeset
   865
    // unloaded at a safepoint.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   866
    No_Safepoint_Verifier nosafepoint;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   867
    return dictionary()->find(d_index, d_hash, class_name, class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   868
                              protection_domain, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   869
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   870
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   871
489c9b5090e2 Initial load
duke
parents:
diff changeset
   872
489c9b5090e2 Initial load
duke
parents:
diff changeset
   873
// Look for a loaded instance or array klass by name.  Do not do any loading.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   874
// return NULL in case of error.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   875
klassOop SystemDictionary::find_instance_or_array_klass(symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   876
                                                        Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   877
                                                        Handle protection_domain,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   878
                                                        TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   879
  klassOop k = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   880
  assert(class_name() != NULL, "class name must be non NULL");
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   881
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   882
  // Try to get one of the well-known klasses.
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   883
  if (LinkWellKnownClasses) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   884
    k = find_well_known_klass(class_name());
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   885
    if (k != NULL) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   886
      return k;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   887
    }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   888
  }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   889
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   890
  if (FieldType::is_array(class_name())) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   891
    // The name refers to an array.  Parse the name.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   892
    jint dimension;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   893
    symbolOop object_key;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   894
489c9b5090e2 Initial load
duke
parents:
diff changeset
   895
    // dimension and object_key are assigned as a side-effect of this call
489c9b5090e2 Initial load
duke
parents:
diff changeset
   896
    BasicType t = FieldType::get_array_info(class_name(), &dimension,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   897
                                            &object_key, CHECK_(NULL));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   898
    if (t != T_OBJECT) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   899
      k = Universe::typeArrayKlassObj(t);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   900
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   901
      symbolHandle h_key(THREAD, object_key);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   902
      k = SystemDictionary::find(h_key, class_loader, protection_domain, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   903
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   904
    if (k != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   905
      k = Klass::cast(k)->array_klass_or_null(dimension);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   906
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   907
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   908
    k = find(class_name, class_loader, protection_domain, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   909
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   910
  return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   911
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   912
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   913
// Quick range check for names of well-known classes:
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   914
static symbolOop wk_klass_name_limits[2] = {NULL, NULL};
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   915
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   916
#ifndef PRODUCT
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   917
static int find_wkk_calls, find_wkk_probes, find_wkk_wins;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   918
// counts for "hello world": 3983, 1616, 1075
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   919
//  => 60% hit after limit guard, 25% total win rate
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   920
#endif
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   921
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   922
klassOop SystemDictionary::find_well_known_klass(symbolOop class_name) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   923
  // A bounds-check on class_name will quickly get a negative result.
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   924
  NOT_PRODUCT(find_wkk_calls++);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   925
  if (class_name >= wk_klass_name_limits[0] &&
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   926
      class_name <= wk_klass_name_limits[1]) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   927
    NOT_PRODUCT(find_wkk_probes++);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   928
    vmSymbols::SID sid = vmSymbols::find_sid(class_name);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   929
    if (sid != vmSymbols::NO_SID) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   930
      klassOop k = NULL;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   931
      switch (sid) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   932
        #define WK_KLASS_CASE(name, symbol, ignore_option) \
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   933
        case vmSymbols::VM_SYMBOL_ENUM_NAME(symbol): \
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   934
          k = WK_KLASS(name); break;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   935
        WK_KLASSES_DO(WK_KLASS_CASE)
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   936
        #undef WK_KLASS_CASE
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   937
      }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   938
      NOT_PRODUCT(if (k != NULL)  find_wkk_wins++);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   939
      return k;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   940
    }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   941
  }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   942
  return NULL;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   943
}
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   944
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   945
// Note: this method is much like resolve_from_stream, but
489c9b5090e2 Initial load
duke
parents:
diff changeset
   946
// updates no supplemental data structures.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   947
// TODO consolidate the two methods with a helper routine?
489c9b5090e2 Initial load
duke
parents:
diff changeset
   948
klassOop SystemDictionary::parse_stream(symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   949
                                        Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   950
                                        Handle protection_domain,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   951
                                        ClassFileStream* st,
1550
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
   952
                                        KlassHandle host_klass,
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
   953
                                        GrowableArray<Handle>* cp_patches,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   954
                                        TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   955
  symbolHandle parsed_name;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   956
489c9b5090e2 Initial load
duke
parents:
diff changeset
   957
  // Parse the stream. Note that we do this even though this klass might
489c9b5090e2 Initial load
duke
parents:
diff changeset
   958
  // already be present in the SystemDictionary, otherwise we would not
489c9b5090e2 Initial load
duke
parents:
diff changeset
   959
  // throw potential ClassFormatErrors.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   960
  //
489c9b5090e2 Initial load
duke
parents:
diff changeset
   961
  // Note: "name" is updated.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   962
  // Further note:  a placeholder will be added for this class when
489c9b5090e2 Initial load
duke
parents:
diff changeset
   963
  //   super classes are loaded (resolve_super_or_fail). We expect this
489c9b5090e2 Initial load
duke
parents:
diff changeset
   964
  //   to be called for all classes but java.lang.Object; and we preload
489c9b5090e2 Initial load
duke
parents:
diff changeset
   965
  //   java.lang.Object through resolve_or_fail, not this path.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   966
489c9b5090e2 Initial load
duke
parents:
diff changeset
   967
  instanceKlassHandle k = ClassFileParser(st).parseClassFile(class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   968
                                                             class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   969
                                                             protection_domain,
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   970
                                                             host_klass,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   971
                                                             cp_patches,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   972
                                                             parsed_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   973
                                                             THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   974
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   975
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   976
  // We don't redefine the class, so we just need to clean up whether there
489c9b5090e2 Initial load
duke
parents:
diff changeset
   977
  // was an error or not (don't want to modify any system dictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
   978
  // data structures).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   979
  // Parsed name could be null if we threw an error before we got far
489c9b5090e2 Initial load
duke
parents:
diff changeset
   980
  // enough along to parse it -- in that case, there is nothing to clean up.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   981
  if (!parsed_name.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   982
    unsigned int p_hash = placeholders()->compute_hash(parsed_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   983
                                                       class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   984
    int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   985
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   986
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   987
    placeholders()->find_and_remove(p_index, p_hash, parsed_name, class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   988
    SystemDictionary_lock->notify_all();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   989
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   990
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   991
1550
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
   992
  if (host_klass.not_null() && k.not_null()) {
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
   993
    assert(AnonymousClasses, "");
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
   994
    // If it's anonymous, initialize it now, since nobody else will.
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
   995
    k->set_host_klass(host_klass());
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
   996
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
   997
    {
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
   998
      MutexLocker mu_r(Compile_lock, THREAD);
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
   999
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1000
      // Add to class hierarchy, initialize vtables, and do possible
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1001
      // deoptimizations.
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1002
      add_to_hierarchy(k, CHECK_NULL); // No exception, but can block
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1003
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1004
      // But, do not add to system dictionary.
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1005
    }
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1006
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1007
    k->eager_initialize(THREAD);
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1008
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1009
    // notify jvmti
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1010
    if (JvmtiExport::should_post_class_load()) {
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1011
        assert(THREAD->is_Java_thread(), "thread->is_Java_thread()");
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1012
        JvmtiExport::post_class_load((JavaThread *) THREAD, k());
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1013
    }
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1014
  }
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1015
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1016
  return k();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1017
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1018
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1019
// Add a klass to the system from a stream (called by jni_DefineClass and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1020
// JVM_DefineClass).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1021
// Note: class_name can be NULL. In that case we do not know the name of
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1022
// the class until we have parsed the stream.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1023
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1024
klassOop SystemDictionary::resolve_from_stream(symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1025
                                               Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1026
                                               Handle protection_domain,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1027
                                               ClassFileStream* st,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1028
                                               TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1029
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1030
  // Classloaders that support parallelism, e.g. bootstrap classloader,
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1031
  // or all classloaders with UnsyncloadClass do not acquire lock here
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1032
  bool DoObjectLock = true;
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1033
  if (is_parallelCapable(class_loader)) {
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1034
    DoObjectLock = false;
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1035
  }
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1036
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1037
  // Make sure we are synchronized on the class loader before we proceed
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1038
  Handle lockObject = compute_loader_lock_object(class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1039
  check_loader_lock_contention(lockObject, THREAD);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1040
  ObjectLocker ol(lockObject, THREAD, DoObjectLock);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1041
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1042
  symbolHandle parsed_name;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1043
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1044
  // Parse the stream. Note that we do this even though this klass might
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1045
  // already be present in the SystemDictionary, otherwise we would not
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1046
  // throw potential ClassFormatErrors.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1047
  //
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1048
  // Note: "name" is updated.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1049
  // Further note:  a placeholder will be added for this class when
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1050
  //   super classes are loaded (resolve_super_or_fail). We expect this
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1051
  //   to be called for all classes but java.lang.Object; and we preload
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1052
  //   java.lang.Object through resolve_or_fail, not this path.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1053
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1054
  instanceKlassHandle k = ClassFileParser(st).parseClassFile(class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1055
                                                             class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1056
                                                             protection_domain,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1057
                                                             parsed_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1058
                                                             THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1059
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1060
  const char* pkg = "java/";
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1061
  if (!HAS_PENDING_EXCEPTION &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1062
      !class_loader.is_null() &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1063
      !parsed_name.is_null() &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1064
      !strncmp((const char*)parsed_name->bytes(), pkg, strlen(pkg))) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1065
    // It is illegal to define classes in the "java." package from
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1066
    // JVM_DefineClass or jni_DefineClass unless you're the bootclassloader
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1067
    ResourceMark rm(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1068
    char* name = parsed_name->as_C_string();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1069
    char* index = strrchr(name, '/');
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1070
    *index = '\0'; // chop to just the package name
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1071
    while ((index = strchr(name, '/')) != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1072
      *index = '.'; // replace '/' with '.' in package name
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1073
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1074
    const char* fmt = "Prohibited package name: %s";
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1075
    size_t len = strlen(fmt) + strlen(name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1076
    char* message = NEW_RESOURCE_ARRAY(char, len);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1077
    jio_snprintf(message, len, fmt, name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1078
    Exceptions::_throw_msg(THREAD_AND_LOCATION,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1079
      vmSymbols::java_lang_SecurityException(), message);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1080
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1081
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1082
  if (!HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1083
    assert(!parsed_name.is_null(), "Sanity");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1084
    assert(class_name.is_null() || class_name() == parsed_name(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1085
           "name mismatch");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1086
    // Verification prevents us from creating names with dots in them, this
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1087
    // asserts that that's the case.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1088
    assert(is_internal_format(parsed_name),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1089
           "external class name format used internally");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1090
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1091
    // Add class just loaded
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1092
    // If a class loader supports parallel classloading handle parallel define requests
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1093
    // find_or_define_instance_class may return a different instanceKlass
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1094
    if (is_parallelCapable(class_loader)) {
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1095
      k = find_or_define_instance_class(class_name, class_loader, k, THREAD);
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1096
    } else {
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1097
      define_instance_class(k, THREAD);
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1098
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1099
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1100
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1101
  // If parsing the class file or define_instance_class failed, we
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1102
  // need to remove the placeholder added on our behalf. But we
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1103
  // must make sure parsed_name is valid first (it won't be if we had
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1104
  // a format error before the class was parsed far enough to
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1105
  // find the name).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1106
  if (HAS_PENDING_EXCEPTION && !parsed_name.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1107
    unsigned int p_hash = placeholders()->compute_hash(parsed_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1108
                                                       class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1109
    int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1110
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1111
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1112
    placeholders()->find_and_remove(p_index, p_hash, parsed_name, class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1113
    SystemDictionary_lock->notify_all();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1114
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1115
    return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1116
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1117
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1118
  // Make sure that we didn't leave a place holder in the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1119
  // SystemDictionary; this is only done on success
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1120
  debug_only( {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1121
    if (!HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1122
      assert(!parsed_name.is_null(), "parsed_name is still null?");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1123
      symbolHandle h_name   (THREAD, k->name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1124
      Handle h_loader (THREAD, k->class_loader());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1125
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1126
      MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1127
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1128
      oop check = find_class_or_placeholder(parsed_name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1129
      assert(check == k(), "should be present in the dictionary");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1130
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1131
      oop check2 = find_class_or_placeholder(h_name, h_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1132
      assert(check == check2, "name inconsistancy in SystemDictionary");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1133
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1134
  } );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1135
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1136
  return k();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1137
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1138
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1139
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1140
void SystemDictionary::set_shared_dictionary(HashtableBucket* t, int length,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1141
                                             int number_of_entries) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1142
  assert(length == _nof_buckets * sizeof(HashtableBucket),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1143
         "bad shared dictionary size.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1144
  _shared_dictionary = new Dictionary(_nof_buckets, t, number_of_entries);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1145
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1146
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1147
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1148
// If there is a shared dictionary, then find the entry for the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1149
// given shared system class, if any.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1150
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1151
klassOop SystemDictionary::find_shared_class(symbolHandle class_name) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1152
  if (shared_dictionary() != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1153
    unsigned int d_hash = dictionary()->compute_hash(class_name, Handle());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1154
    int d_index = dictionary()->hash_to_index(d_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1155
    return shared_dictionary()->find_shared_class(d_index, d_hash, class_name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1156
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1157
    return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1158
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1159
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1160
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1161
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1162
// Load a class from the shared spaces (found through the shared system
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1163
// dictionary).  Force the superclass and all interfaces to be loaded.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1164
// Update the class definition to include sibling classes and no
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1165
// subclasses (yet).  [Classes in the shared space are not part of the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1166
// object hierarchy until loaded.]
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1167
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1168
instanceKlassHandle SystemDictionary::load_shared_class(
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1169
                 symbolHandle class_name, Handle class_loader, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1170
  instanceKlassHandle ik (THREAD, find_shared_class(class_name));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1171
  return load_shared_class(ik, class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1172
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1173
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1174
// Note well!  Changes to this method may affect oop access order
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1175
// in the shared archive.  Please take care to not make changes that
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1176
// adversely affect cold start time by changing the oop access order
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1177
// that is specified in dump.cpp MarkAndMoveOrderedReadOnly and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1178
// MarkAndMoveOrderedReadWrite closures.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1179
instanceKlassHandle SystemDictionary::load_shared_class(
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1180
                 instanceKlassHandle ik, Handle class_loader, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1181
  assert(class_loader.is_null(), "non-null classloader for shared class?");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1182
  if (ik.not_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1183
    instanceKlassHandle nh = instanceKlassHandle(); // null Handle
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1184
    symbolHandle class_name(THREAD, ik->name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1185
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1186
    // Found the class, now load the superclass and interfaces.  If they
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1187
    // are shared, add them to the main system dictionary and reset
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1188
    // their hierarchy references (supers, subs, and interfaces).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1189
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1190
    if (ik->super() != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1191
      symbolHandle cn(THREAD, ik->super()->klass_part()->name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1192
      resolve_super_or_fail(class_name, cn,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1193
                            class_loader, Handle(), true, CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1194
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1195
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1196
    objArrayHandle interfaces (THREAD, ik->local_interfaces());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1197
    int num_interfaces = interfaces->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1198
    for (int index = 0; index < num_interfaces; index++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1199
      klassOop k = klassOop(interfaces->obj_at(index));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1200
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1201
      // Note: can not use instanceKlass::cast here because
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1202
      // interfaces' instanceKlass's C++ vtbls haven't been
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1203
      // reinitialized yet (they will be once the interface classes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1204
      // are loaded)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1205
      symbolHandle name (THREAD, k->klass_part()->name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1206
      resolve_super_or_fail(class_name, name, class_loader, Handle(), false, CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1207
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1208
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1209
    // Adjust methods to recover missing data.  They need addresses for
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1210
    // interpreter entry points and their default native method address
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1211
    // must be reset.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1212
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1213
    // Updating methods must be done under a lock so multiple
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1214
    // threads don't update these in parallel
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1215
    // Shared classes are all currently loaded by the bootstrap
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1216
    // classloader, so this will never cause a deadlock on
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1217
    // a custom class loader lock.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1218
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1219
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1220
      Handle lockObject = compute_loader_lock_object(class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1221
      check_loader_lock_contention(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1222
      ObjectLocker ol(lockObject, THREAD, true);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1223
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1224
      objArrayHandle methods (THREAD, ik->methods());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1225
      int num_methods = methods->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1226
      for (int index2 = 0; index2 < num_methods; ++index2) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1227
        methodHandle m(THREAD, methodOop(methods->obj_at(index2)));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1228
        m()->link_method(m, CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1229
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1230
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1231
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1232
    if (TraceClassLoading) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1233
      ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1234
      tty->print("[Loaded %s", ik->external_name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1235
      tty->print(" from shared objects file");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1236
      tty->print_cr("]");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1237
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1238
    // notify a class loaded from shared object
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1239
    ClassLoadingService::notify_class_loaded(instanceKlass::cast(ik()),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1240
                                             true /* shared class */);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1241
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1242
  return ik;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1243
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1244
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1245
#ifdef KERNEL
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1246
// Some classes on the bootstrap class path haven't been installed on the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1247
// system yet.  Call the DownloadManager method to make them appear in the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1248
// bootstrap class path and try again to load the named class.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1249
// Note that with delegation class loaders all classes in another loader will
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1250
// first try to call this so it'd better be fast!!
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1251
static instanceKlassHandle download_and_retry_class_load(
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1252
                                                    symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1253
                                                    TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1254
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1255
  klassOop dlm = SystemDictionary::sun_jkernel_DownloadManager_klass();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1256
  instanceKlassHandle nk;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1257
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1258
  // If download manager class isn't loaded just return.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1259
  if (dlm == NULL) return nk;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1260
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1261
  { HandleMark hm(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1262
    ResourceMark rm(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1263
    Handle s = java_lang_String::create_from_symbol(class_name, CHECK_(nk));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1264
    Handle class_string = java_lang_String::externalize_classname(s, CHECK_(nk));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1265
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1266
    // return value
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1267
    JavaValue result(T_OBJECT);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1268
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1269
    // Call the DownloadManager.  We assume that it has a lock because
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1270
    // multiple classes could be not found and downloaded at the same time.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1271
    // class sun.misc.DownloadManager;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1272
    // public static String getBootClassPathEntryForClass(String className);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1273
    JavaCalls::call_static(&result,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1274
                       KlassHandle(THREAD, dlm),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1275
                       vmSymbolHandles::getBootClassPathEntryForClass_name(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1276
                       vmSymbolHandles::string_string_signature(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1277
                       class_string,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1278
                       CHECK_(nk));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1279
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1280
    // Get result.string and add to bootclasspath
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1281
    assert(result.get_type() == T_OBJECT, "just checking");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1282
    oop obj = (oop) result.get_jobject();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1283
    if (obj == NULL) { return nk; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1284
195
9193828514c4 6646946: Kernel installation failed on Japanese and Chinese XP SP2 (VM part)
coleenp
parents: 1
diff changeset
  1285
    Handle h_obj(THREAD, obj);
9193828514c4 6646946: Kernel installation failed on Japanese and Chinese XP SP2 (VM part)
coleenp
parents: 1
diff changeset
  1286
    char* new_class_name = java_lang_String::as_platform_dependent_str(h_obj,
9193828514c4 6646946: Kernel installation failed on Japanese and Chinese XP SP2 (VM part)
coleenp
parents: 1
diff changeset
  1287
                                                                  CHECK_(nk));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1288
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1289
    // lock the loader
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1290
    // we use this lock because JVMTI does.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1291
    Handle loader_lock(THREAD, SystemDictionary::system_loader_lock());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1292
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1293
    ObjectLocker ol(loader_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1294
    // add the file to the bootclasspath
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1295
    ClassLoader::update_class_path_entry_list(new_class_name, true);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1296
  } // end HandleMark
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1297
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1298
  if (TraceClassLoading) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1299
    ClassLoader::print_bootclasspath();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1300
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1301
  return ClassLoader::load_classfile(class_name, CHECK_(nk));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1302
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1303
#endif // KERNEL
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1304
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1305
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1306
instanceKlassHandle SystemDictionary::load_instance_class(symbolHandle class_name, Handle class_loader, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1307
  instanceKlassHandle nh = instanceKlassHandle(); // null Handle
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1308
  if (class_loader.is_null()) {
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1309
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1310
    // Search the shared system dictionary for classes preloaded into the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1311
    // shared spaces.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1312
    instanceKlassHandle k;
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1313
    {
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1314
      PerfTraceTime vmtimer(ClassLoader::perf_shared_classload_time());
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1315
      k = load_shared_class(class_name, class_loader, THREAD);
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1316
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1317
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1318
    if (k.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1319
      // Use VM class loader
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1320
      PerfTraceTime vmtimer(ClassLoader::perf_sys_classload_time());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1321
      k = ClassLoader::load_classfile(class_name, CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1322
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1323
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1324
#ifdef KERNEL
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1325
    // If the VM class loader has failed to load the class, call the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1326
    // DownloadManager class to make it magically appear on the classpath
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1327
    // and try again.  This is only configured with the Kernel VM.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1328
    if (k.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1329
      k = download_and_retry_class_load(class_name, CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1330
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1331
#endif // KERNEL
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1332
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1333
    // find_or_define_instance_class may return a different instanceKlass
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1334
    if (!k.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1335
      k = find_or_define_instance_class(class_name, class_loader, k, CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1336
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1337
    return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1338
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1339
    // Use user specified class loader to load class. Call loadClass operation on class_loader.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1340
    ResourceMark rm(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1341
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1342
    assert(THREAD->is_Java_thread(), "must be a JavaThread");
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1343
    JavaThread* jt = (JavaThread*) THREAD;
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1344
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1345
    PerfClassTraceTime vmtimer(ClassLoader::perf_app_classload_time(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1346
                               ClassLoader::perf_app_classload_selftime(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1347
                               ClassLoader::perf_app_classload_count(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1348
                               jt->get_thread_stat()->perf_recursion_counts_addr(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1349
                               jt->get_thread_stat()->perf_timers_addr(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1350
                               PerfClassTraceTime::CLASS_LOAD);
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1351
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1352
    Handle s = java_lang_String::create_from_symbol(class_name, CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1353
    // Translate to external class name format, i.e., convert '/' chars to '.'
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1354
    Handle string = java_lang_String::externalize_classname(s, CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1355
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1356
    JavaValue result(T_OBJECT);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1357
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1358
    KlassHandle spec_klass (THREAD, SystemDictionary::classloader_klass());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1359
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1360
    // Call public unsynchronized loadClass(String) directly for all class loaders
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1361
    // for parallelCapable class loaders. JDK >=7, loadClass(String, boolean) will
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1362
    // acquire a class-name based lock rather than the class loader object lock.
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1363
    // JDK < 7 already acquire the class loader lock in loadClass(String, boolean),
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1364
    // so the call to loadClassInternal() was not required.
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1365
    //
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1366
    // UnsyncloadClass flag means both call loadClass(String) and do
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1367
    // not acquire the class loader lock even for class loaders that are
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1368
    // not parallelCapable. This was a risky transitional
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1369
    // flag for diagnostic purposes only. It is risky to call
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1370
    // custom class loaders without synchronization.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1371
    // WARNING If a custom class loader does NOT synchronizer findClass, or callers of
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1372
    // findClass, the UnsyncloadClass flag risks unexpected timing bugs in the field.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1373
    // Do NOT assume this will be supported in future releases.
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1374
    //
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1375
    // Added MustCallLoadClassInternal in case we discover in the field
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1376
    // a customer that counts on this call
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1377
    if (MustCallLoadClassInternal && has_loadClassInternal()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1378
      JavaCalls::call_special(&result,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1379
                              class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1380
                              spec_klass,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1381
                              vmSymbolHandles::loadClassInternal_name(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1382
                              vmSymbolHandles::string_class_signature(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1383
                              string,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1384
                              CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1385
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1386
      JavaCalls::call_virtual(&result,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1387
                              class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1388
                              spec_klass,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1389
                              vmSymbolHandles::loadClass_name(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1390
                              vmSymbolHandles::string_class_signature(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1391
                              string,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1392
                              CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1393
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1394
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1395
    assert(result.get_type() == T_OBJECT, "just checking");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1396
    oop obj = (oop) result.get_jobject();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1397
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1398
    // Primitive classes return null since forName() can not be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1399
    // used to obtain any of the Class objects representing primitives or void
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1400
    if ((obj != NULL) && !(java_lang_Class::is_primitive(obj))) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1401
      instanceKlassHandle k =
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1402
                instanceKlassHandle(THREAD, java_lang_Class::as_klassOop(obj));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1403
      // For user defined Java class loaders, check that the name returned is
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1404
      // the same as that requested.  This check is done for the bootstrap
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1405
      // loader when parsing the class file.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1406
      if (class_name() == k->name()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1407
        return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1408
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1409
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1410
    // Class is not found or has the wrong name, return NULL
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1411
    return nh;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1412
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1413
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1414
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1415
void SystemDictionary::define_instance_class(instanceKlassHandle k, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1416
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1417
  Handle class_loader_h(THREAD, k->class_loader());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1418
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1419
 // for bootstrap and other parallel classloaders don't acquire lock,
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1420
 // use placeholder token
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1421
 // If a parallelCapable class loader calls define_instance_class instead of
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1422
 // find_or_define_instance_class to get here, we have a timing
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1423
 // hole with systemDictionary updates and check_constraints
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1424
 if (!class_loader_h.is_null() && !is_parallelCapable(class_loader_h)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1425
    assert(ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1426
         compute_loader_lock_object(class_loader_h, THREAD)),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1427
         "define called without lock");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1428
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1429
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1430
  // Check class-loading constraints. Throw exception if violation is detected.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1431
  // Grabs and releases SystemDictionary_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1432
  // The check_constraints/find_class call and update_dictionary sequence
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1433
  // must be "atomic" for a specific class/classloader pair so we never
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1434
  // define two different instanceKlasses for that class/classloader pair.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1435
  // Existing classloaders will call define_instance_class with the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1436
  // classloader lock held
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1437
  // Parallel classloaders will call find_or_define_instance_class
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1438
  // which will require a token to perform the define class
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1439
  symbolHandle name_h(THREAD, k->name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1440
  unsigned int d_hash = dictionary()->compute_hash(name_h, class_loader_h);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1441
  int d_index = dictionary()->hash_to_index(d_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1442
  check_constraints(d_index, d_hash, k, class_loader_h, true, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1443
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1444
  // Register class just loaded with class loader (placed in Vector)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1445
  // Note we do this before updating the dictionary, as this can
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1446
  // fail with an OutOfMemoryError (if it does, we will *not* put this
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1447
  // class in the dictionary and will not update the class hierarchy).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1448
  if (k->class_loader() != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1449
    methodHandle m(THREAD, Universe::loader_addClass_method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1450
    JavaValue result(T_VOID);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1451
    JavaCallArguments args(class_loader_h);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1452
    args.push_oop(Handle(THREAD, k->java_mirror()));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1453
    JavaCalls::call(&result, m, &args, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1454
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1455
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1456
  // Add the new class. We need recompile lock during update of CHA.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1457
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1458
    unsigned int p_hash = placeholders()->compute_hash(name_h, class_loader_h);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1459
    int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1460
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1461
    MutexLocker mu_r(Compile_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1462
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1463
    // Add to class hierarchy, initialize vtables, and do possible
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1464
    // deoptimizations.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1465
    add_to_hierarchy(k, CHECK); // No exception, but can block
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1466
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1467
    // Add to systemDictionary - so other classes can see it.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1468
    // Grabs and releases SystemDictionary_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1469
    update_dictionary(d_index, d_hash, p_index, p_hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1470
                      k, class_loader_h, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1471
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1472
  k->eager_initialize(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1473
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1474
  // notify jvmti
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1475
  if (JvmtiExport::should_post_class_load()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1476
      assert(THREAD->is_Java_thread(), "thread->is_Java_thread()");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1477
      JvmtiExport::post_class_load((JavaThread *) THREAD, k());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1478
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1479
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1480
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1481
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1482
// Support parallel classloading
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1483
// Initial implementation for bootstrap classloader
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1484
// For custom class loaders that support parallel classloading,
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1485
// With AllowParallelDefine flag==true, in case they do not synchronize around
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1486
// FindLoadedClass/DefineClass, calls, we check for parallel
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1487
// loading for them, wait if a defineClass is in progress
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1488
// and return the initial requestor's results
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1489
// With AllowParallelDefine flag==false, call through to define_instance_class
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1490
// which will throw LinkageError: duplicate class definition.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1491
// For better performance, the class loaders should synchronize
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1492
// findClass(), i.e. FindLoadedClass/DefineClassIfAbsent or they
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1493
// potentially waste time reading and parsing the bytestream.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1494
// Note: VM callers should ensure consistency of k/class_name,class_loader
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1495
instanceKlassHandle SystemDictionary::find_or_define_instance_class(symbolHandle class_name, Handle class_loader, instanceKlassHandle k, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1496
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1497
  instanceKlassHandle nh = instanceKlassHandle(); // null Handle
1891
33f8185f669e 6791656: nsk defclass0 asserts handles.hpp
acorn
parents: 1890
diff changeset
  1498
  symbolHandle name_h(THREAD, k->name()); // passed in class_name may be null
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1499
1891
33f8185f669e 6791656: nsk defclass0 asserts handles.hpp
acorn
parents: 1890
diff changeset
  1500
  unsigned int d_hash = dictionary()->compute_hash(name_h, class_loader);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1501
  int d_index = dictionary()->hash_to_index(d_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1502
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1503
// Hold SD lock around find_class and placeholder creation for DEFINE_CLASS
1891
33f8185f669e 6791656: nsk defclass0 asserts handles.hpp
acorn
parents: 1890
diff changeset
  1504
  unsigned int p_hash = placeholders()->compute_hash(name_h, class_loader);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1505
  int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1506
  PlaceholderEntry* probe;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1507
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1508
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1509
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1510
    // First check if class already defined
1891
33f8185f669e 6791656: nsk defclass0 asserts handles.hpp
acorn
parents: 1890
diff changeset
  1511
    klassOop check = find_class(d_index, d_hash, name_h, class_loader);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1512
    if (check != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1513
      return(instanceKlassHandle(THREAD, check));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1514
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1515
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1516
    // Acquire define token for this class/classloader
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1517
    symbolHandle nullsymbolHandle;
1891
33f8185f669e 6791656: nsk defclass0 asserts handles.hpp
acorn
parents: 1890
diff changeset
  1518
    probe = placeholders()->find_and_add(p_index, p_hash, name_h, class_loader, PlaceholderTable::DEFINE_CLASS, nullsymbolHandle, THREAD);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1519
    // Wait if another thread defining in parallel
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1520
    // All threads wait - even those that will throw duplicate class: otherwise
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1521
    // caller is surprised by LinkageError: duplicate, but findLoadedClass fails
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1522
    // if other thread has not finished updating dictionary
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1523
    while (probe->definer() != NULL) {
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1524
      SystemDictionary_lock->wait();
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1525
    }
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1526
    // Only special cases allow parallel defines and can use other thread's results
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1527
    // Other cases fall through, and may run into duplicate defines
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1528
    // caught by finding an entry in the SystemDictionary
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1529
    if ((UnsyncloadClass || AllowParallelDefineClass) && (probe->instanceKlass() != NULL)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1530
        probe->remove_seen_thread(THREAD, PlaceholderTable::DEFINE_CLASS);
1891
33f8185f669e 6791656: nsk defclass0 asserts handles.hpp
acorn
parents: 1890
diff changeset
  1531
        placeholders()->find_and_remove(p_index, p_hash, name_h, class_loader, THREAD);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1532
        SystemDictionary_lock->notify_all();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1533
#ifdef ASSERT
1891
33f8185f669e 6791656: nsk defclass0 asserts handles.hpp
acorn
parents: 1890
diff changeset
  1534
        klassOop check = find_class(d_index, d_hash, name_h, class_loader);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1535
        assert(check != NULL, "definer missed recording success");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1536
#endif
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1537
        return(instanceKlassHandle(THREAD, probe->instanceKlass()));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1538
    } else {
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1539
      // This thread will define the class (even if earlier thread tried and had an error)
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1540
      probe->set_definer(THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1541
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1542
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1543
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1544
  define_instance_class(k, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1545
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1546
  Handle linkage_exception = Handle(); // null handle
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1547
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1548
  // definer must notify any waiting threads
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1549
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1550
    MutexLocker mu(SystemDictionary_lock, THREAD);
1891
33f8185f669e 6791656: nsk defclass0 asserts handles.hpp
acorn
parents: 1890
diff changeset
  1551
    PlaceholderEntry* probe = placeholders()->get_entry(p_index, p_hash, name_h, class_loader);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1552
    assert(probe != NULL, "DEFINE_CLASS placeholder lost?");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1553
    if (probe != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1554
      if (HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1555
        linkage_exception = Handle(THREAD,PENDING_EXCEPTION);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1556
        CLEAR_PENDING_EXCEPTION;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1557
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1558
        probe->set_instanceKlass(k());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1559
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1560
      probe->set_definer(NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1561
      probe->remove_seen_thread(THREAD, PlaceholderTable::DEFINE_CLASS);
1891
33f8185f669e 6791656: nsk defclass0 asserts handles.hpp
acorn
parents: 1890
diff changeset
  1562
      placeholders()->find_and_remove(p_index, p_hash, name_h, class_loader, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1563
      SystemDictionary_lock->notify_all();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1564
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1565
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1566
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1567
  // Can't throw exception while holding lock due to rank ordering
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1568
  if (linkage_exception() != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1569
    THROW_OOP_(linkage_exception(), nh); // throws exception and returns
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1570
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1571
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1572
  return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1573
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1574
Handle SystemDictionary::compute_loader_lock_object(Handle class_loader, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1575
  // If class_loader is NULL we synchronize on _system_loader_lock_obj
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1576
  if (class_loader.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1577
    return Handle(THREAD, _system_loader_lock_obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1578
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1579
    return class_loader;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1580
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1581
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1582
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1583
// This method is added to check how often we have to wait to grab loader
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1584
// lock. The results are being recorded in the performance counters defined in
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1585
// ClassLoader::_sync_systemLoaderLockContentionRate and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1586
// ClassLoader::_sync_nonSystemLoaderLockConteionRate.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1587
void SystemDictionary::check_loader_lock_contention(Handle loader_lock, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1588
  if (!UsePerfData) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1589
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1590
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1591
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1592
  assert(!loader_lock.is_null(), "NULL lock object");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1593
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1594
  if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader_lock)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1595
      == ObjectSynchronizer::owner_other) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1596
    // contention will likely happen, so increment the corresponding
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1597
    // contention counter.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1598
    if (loader_lock() == _system_loader_lock_obj) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1599
      ClassLoader::sync_systemLoaderLockContentionRate()->inc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1600
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1601
      ClassLoader::sync_nonSystemLoaderLockContentionRate()->inc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1602
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1603
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1604
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1605
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1606
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1607
// Lookup
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1608
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1609
klassOop SystemDictionary::find_class(int index, unsigned int hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1610
                                      symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1611
                                      Handle class_loader) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1612
  assert_locked_or_safepoint(SystemDictionary_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1613
  assert (index == dictionary()->index_for(class_name, class_loader),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1614
          "incorrect index?");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1615
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1616
  klassOop k = dictionary()->find_class(index, hash, class_name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1617
  return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1618
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1619
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1620
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1621
// Basic find on classes in the midst of being loaded
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1622
symbolOop SystemDictionary::find_placeholder(int index, unsigned int hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1623
                                             symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1624
                                             Handle class_loader) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1625
  assert_locked_or_safepoint(SystemDictionary_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1626
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1627
  return placeholders()->find_entry(index, hash, class_name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1628
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1629
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1630
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1631
// Used for assertions and verification only
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1632
oop SystemDictionary::find_class_or_placeholder(symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1633
                                                Handle class_loader) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1634
  #ifndef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1635
  guarantee(VerifyBeforeGC   ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1636
            VerifyDuringGC   ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1637
            VerifyBeforeExit ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1638
            VerifyAfterGC, "too expensive");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1639
  #endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1640
  assert_locked_or_safepoint(SystemDictionary_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1641
  symbolOop class_name_ = class_name();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1642
  oop class_loader_ = class_loader();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1643
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1644
  // First look in the loaded class array
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1645
  unsigned int d_hash = dictionary()->compute_hash(class_name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1646
  int d_index = dictionary()->hash_to_index(d_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1647
  oop lookup = find_class(d_index, d_hash, class_name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1648
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1649
  if (lookup == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1650
    // Next try the placeholders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1651
    unsigned int p_hash = placeholders()->compute_hash(class_name,class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1652
    int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1653
    lookup = find_placeholder(p_index, p_hash, class_name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1654
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1655
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1656
  return lookup;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1657
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1658
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1659
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1660
// Get the next class in the diictionary.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1661
klassOop SystemDictionary::try_get_next_class() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1662
  return dictionary()->try_get_next_class();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1663
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1664
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1665
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1666
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1667
// Update hierachy. This is done before the new klass has been added to the SystemDictionary. The Recompile_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1668
// is held, to ensure that the compiler is not using the class hierachy, and that deoptimization will kick in
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1669
// before a new class is used.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1670
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1671
void SystemDictionary::add_to_hierarchy(instanceKlassHandle k, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1672
  assert(k.not_null(), "just checking");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1673
  // Link into hierachy. Make sure the vtables are initialized before linking into
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1674
  k->append_to_sibling_list();                    // add to superklass/sibling list
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1675
  k->process_interfaces(THREAD);                  // handle all "implements" declarations
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1676
  k->set_init_state(instanceKlass::loaded);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1677
  // Now flush all code that depended on old class hierarchy.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1678
  // Note: must be done *after* linking k into the hierarchy (was bug 12/9/97)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1679
  // Also, first reinitialize vtable because it may have gotten out of synch
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1680
  // while the new class wasn't connected to the class hierarchy.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1681
  Universe::flush_dependents_on(k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1682
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1683
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1684
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1685
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1686
// GC support
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1687
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1688
// Following roots during mark-sweep is separated in two phases.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1689
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1690
// The first phase follows preloaded classes and all other system
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1691
// classes, since these will never get unloaded anyway.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1692
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1693
// The second phase removes (unloads) unreachable classes from the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1694
// system dictionary and follows the remaining classes' contents.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1695
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1696
void SystemDictionary::always_strong_oops_do(OopClosure* blk) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1697
  // Follow preloaded classes/mirrors and system loader object
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1698
  blk->do_oop(&_java_system_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1699
  preloaded_oops_do(blk);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1700
  always_strong_classes_do(blk);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1701
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1702
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1703
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1704
void SystemDictionary::always_strong_classes_do(OopClosure* blk) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1705
  // Follow all system classes and temporary placeholders in dictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1706
  dictionary()->always_strong_classes_do(blk);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1707
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1708
  // Placeholders. These are *always* strong roots, as they
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1709
  // represent classes we're actively loading.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1710
  placeholders_do(blk);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1711
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1712
  // Visit extra methods
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1713
  if (invoke_method_table() != NULL)
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1714
    invoke_method_table()->oops_do(blk);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1715
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1716
  // Loader constraints. We must keep the symbolOop used in the name alive.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1717
  constraints()->always_strong_classes_do(blk);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1718
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1719
  // Resolution errors keep the symbolOop for the error alive
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1720
  resolution_errors()->always_strong_classes_do(blk);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1721
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1722
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1723
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1724
void SystemDictionary::placeholders_do(OopClosure* blk) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1725
  placeholders()->oops_do(blk);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1726
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1727
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1728
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1729
bool SystemDictionary::do_unloading(BoolObjectClosure* is_alive) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1730
  bool result = dictionary()->do_unloading(is_alive);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1731
  constraints()->purge_loader_constraints(is_alive);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1732
  resolution_errors()->purge_resolution_errors(is_alive);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1733
  return result;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1734
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1735
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1736
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1737
// The mirrors are scanned by shared_oops_do() which is
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1738
// not called by oops_do().  In order to process oops in
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1739
// a necessary order, shared_oops_do() is call by
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1740
// Universe::oops_do().
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1741
void SystemDictionary::oops_do(OopClosure* f) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1742
  // Adjust preloaded classes and system loader object
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1743
  f->do_oop(&_java_system_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1744
  preloaded_oops_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1745
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1746
  lazily_loaded_oops_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1747
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1748
  // Adjust dictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1749
  dictionary()->oops_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1750
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1751
  // Visit extra methods
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1752
  if (invoke_method_table() != NULL)
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1753
    invoke_method_table()->oops_do(f);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1754
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1755
  // Partially loaded classes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1756
  placeholders()->oops_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1757
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1758
  // Adjust constraint table
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1759
  constraints()->oops_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1760
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1761
  // Adjust resolution error table
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1762
  resolution_errors()->oops_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1763
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1764
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1765
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1766
void SystemDictionary::preloaded_oops_do(OopClosure* f) {
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1767
  f->do_oop((oop*) &wk_klass_name_limits[0]);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1768
  f->do_oop((oop*) &wk_klass_name_limits[1]);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1769
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1770
  for (int k = (int)FIRST_WKID; k < (int)WKID_LIMIT; k++) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1771
    f->do_oop((oop*) &_well_known_klasses[k]);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1772
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1773
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1774
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1775
    for (int i = 0; i < T_VOID+1; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1776
      if (_box_klasses[i] != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1777
        assert(i >= T_BOOLEAN, "checking");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1778
        f->do_oop((oop*) &_box_klasses[i]);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1779
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1780
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1781
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1782
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1783
  // The basic type mirrors would have already been processed in
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1784
  // Universe::oops_do(), via a call to shared_oops_do(), so should
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1785
  // not be processed again.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1786
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1787
  f->do_oop((oop*) &_system_loader_lock_obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1788
  FilteredFieldsMap::klasses_oops_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1789
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1790
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1791
void SystemDictionary::lazily_loaded_oops_do(OopClosure* f) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1792
  f->do_oop((oop*) &_abstract_ownable_synchronizer_klass);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1793
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1794
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1795
// Just the classes from defining class loaders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1796
// Don't iterate over placeholders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1797
void SystemDictionary::classes_do(void f(klassOop)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1798
  dictionary()->classes_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1799
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1800
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1801
// Added for initialize_itable_for_klass
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1802
//   Just the classes from defining class loaders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1803
// Don't iterate over placeholders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1804
void SystemDictionary::classes_do(void f(klassOop, TRAPS), TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1805
  dictionary()->classes_do(f, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1806
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1807
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1808
//   All classes, and their class loaders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1809
// Don't iterate over placeholders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1810
void SystemDictionary::classes_do(void f(klassOop, oop)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1811
  dictionary()->classes_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1812
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1813
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1814
//   All classes, and their class loaders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1815
//   (added for helpers that use HandleMarks and ResourceMarks)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1816
// Don't iterate over placeholders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1817
void SystemDictionary::classes_do(void f(klassOop, oop, TRAPS), TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1818
  dictionary()->classes_do(f, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1819
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1820
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1821
void SystemDictionary::placeholders_do(void f(symbolOop, oop)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1822
  placeholders()->entries_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1823
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1824
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1825
void SystemDictionary::methods_do(void f(methodOop)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1826
  dictionary()->methods_do(f);
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1827
  if (invoke_method_table() != NULL)
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1828
    invoke_method_table()->methods_do(f);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1829
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1830
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1831
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1832
// Lazily load klasses
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1833
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1834
void SystemDictionary::load_abstract_ownable_synchronizer_klass(TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1835
  assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1836
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1837
  // if multiple threads calling this function, only one thread will load
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1838
  // the class.  The other threads will find the loaded version once the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1839
  // class is loaded.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1840
  klassOop aos = _abstract_ownable_synchronizer_klass;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1841
  if (aos == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1842
    klassOop k = resolve_or_fail(vmSymbolHandles::java_util_concurrent_locks_AbstractOwnableSynchronizer(), true, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1843
    // Force a fence to prevent any read before the write completes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1844
    OrderAccess::fence();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1845
    _abstract_ownable_synchronizer_klass = k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1846
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1847
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1848
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1849
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1850
// Initialization
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1851
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1852
void SystemDictionary::initialize(TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1853
  // Allocate arrays
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1854
  assert(dictionary() == NULL,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1855
         "SystemDictionary should only be initialized once");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1856
  _dictionary = new Dictionary(_nof_buckets);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1857
  _placeholders = new PlaceholderTable(_nof_buckets);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1858
  _number_of_modifications = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1859
  _loader_constraints = new LoaderConstraintTable(_loader_constraint_size);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1860
  _resolution_errors = new ResolutionErrorTable(_resolution_error_size);
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1861
  // _invoke_method_table is allocated lazily in find_method_handle_invoke()
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1862
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1863
  // Allocate private object used as system class loader lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1864
  _system_loader_lock_obj = oopFactory::new_system_objArray(0, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1865
  // Initialize basic classes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1866
  initialize_preloaded_classes(CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1867
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1868
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1869
// Compact table of directions on the initialization of klasses:
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1870
static const short wk_init_info[] = {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1871
  #define WK_KLASS_INIT_INFO(name, symbol, option) \
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1872
    ( ((int)vmSymbols::VM_SYMBOL_ENUM_NAME(symbol) \
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1873
          << SystemDictionary::CEIL_LG_OPTION_LIMIT) \
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1874
      | (int)SystemDictionary::option ),
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1875
  WK_KLASSES_DO(WK_KLASS_INIT_INFO)
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1876
  #undef WK_KLASS_INIT_INFO
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1877
  0
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1878
};
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1879
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1880
bool SystemDictionary::initialize_wk_klass(WKID id, int init_opt, TRAPS) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1881
  assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob");
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1882
  int  info = wk_init_info[id - FIRST_WKID];
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1883
  int  sid  = (info >> CEIL_LG_OPTION_LIMIT);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1884
  symbolHandle symbol = vmSymbolHandles::symbol_handle_at((vmSymbols::SID)sid);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1885
  klassOop*    klassp = &_well_known_klasses[id];
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1886
  bool must_load = (init_opt < SystemDictionary::Opt);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1887
  bool try_load  = true;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1888
  if (init_opt == SystemDictionary::Opt_Kernel) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1889
#ifndef KERNEL
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1890
    try_load = false;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1891
#endif //KERNEL
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1892
  }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1893
  if ((*klassp) == NULL && try_load) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1894
    if (must_load) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1895
      (*klassp) = resolve_or_fail(symbol, true, CHECK_0); // load required class
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1896
    } else {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1897
      (*klassp) = resolve_or_null(symbol,       CHECK_0); // load optional klass
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1898
    }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1899
  }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1900
  return ((*klassp) != NULL);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1901
}
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1902
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1903
void SystemDictionary::initialize_wk_klasses_until(WKID limit_id, WKID &start_id, TRAPS) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1904
  assert((int)start_id <= (int)limit_id, "IDs are out of order!");
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1905
  for (int id = (int)start_id; id < (int)limit_id; id++) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1906
    assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob");
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1907
    int info = wk_init_info[id - FIRST_WKID];
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1908
    int sid  = (info >> CEIL_LG_OPTION_LIMIT);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1909
    int opt  = (info & right_n_bits(CEIL_LG_OPTION_LIMIT));
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1910
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1911
    initialize_wk_klass((WKID)id, opt, CHECK);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1912
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1913
    // Update limits, so find_well_known_klass can be very fast:
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1914
    symbolOop s = vmSymbols::symbol_at((vmSymbols::SID)sid);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1915
    if (wk_klass_name_limits[1] == NULL) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1916
      wk_klass_name_limits[0] = wk_klass_name_limits[1] = s;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1917
    } else if (wk_klass_name_limits[1] < s) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1918
      wk_klass_name_limits[1] = s;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1919
    } else if (wk_klass_name_limits[0] > s) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1920
      wk_klass_name_limits[0] = s;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1921
    }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1922
  }
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1923
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1924
  // move the starting value forward to the limit:
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1925
  start_id = limit_id;
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1926
}
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1927
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1928
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1929
void SystemDictionary::initialize_preloaded_classes(TRAPS) {
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1930
  assert(WK_KLASS(object_klass) == NULL, "preloaded classes should only be initialized once");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1931
  // Preload commonly used klasses
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1932
  WKID scan = FIRST_WKID;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1933
  // first do Object, String, Class
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1934
  initialize_wk_klasses_through(WK_KLASS_ENUM_NAME(class_klass), scan, CHECK);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1935
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1936
  debug_only(instanceKlass::verify_class_klass_nonstatic_oop_maps(WK_KLASS(class_klass)));
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1937
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1938
  // Fixup mirrors for classes loaded before java.lang.Class.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1939
  // These calls iterate over the objects currently in the perm gen
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1940
  // so calling them at this point is matters (not before when there
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1941
  // are fewer objects and not later after there are more objects
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1942
  // in the perm gen.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1943
  Universe::initialize_basic_type_mirrors(CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1944
  Universe::fixup_mirrors(CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1945
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1946
  // do a bunch more:
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1947
  initialize_wk_klasses_through(WK_KLASS_ENUM_NAME(reference_klass), scan, CHECK);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1948
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1949
  // Preload ref klasses and set reference types
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1950
  instanceKlass::cast(WK_KLASS(reference_klass))->set_reference_type(REF_OTHER);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1951
  instanceRefKlass::update_nonstatic_oop_maps(WK_KLASS(reference_klass));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1952
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1953
  initialize_wk_klasses_through(WK_KLASS_ENUM_NAME(phantom_reference_klass), scan, CHECK);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1954
  instanceKlass::cast(WK_KLASS(soft_reference_klass))->set_reference_type(REF_SOFT);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1955
  instanceKlass::cast(WK_KLASS(weak_reference_klass))->set_reference_type(REF_WEAK);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1956
  instanceKlass::cast(WK_KLASS(final_reference_klass))->set_reference_type(REF_FINAL);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1957
  instanceKlass::cast(WK_KLASS(phantom_reference_klass))->set_reference_type(REF_PHANTOM);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1958
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1959
  WKID meth_group_start = WK_KLASS_ENUM_NAME(MethodHandle_klass);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1960
  WKID meth_group_end   = WK_KLASS_ENUM_NAME(WrongMethodTypeException_klass);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1961
  initialize_wk_klasses_until(meth_group_start, scan, CHECK);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1962
  if (EnableMethodHandles) {
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1963
    initialize_wk_klasses_through(meth_group_start, scan, CHECK);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1964
  }
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1965
  if (_well_known_klasses[meth_group_start] == NULL) {
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1966
    // Skip the rest of the method handle classes, if MethodHandle is not loaded.
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1967
    scan = WKID(meth_group_end+1);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1968
  }
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  1969
  WKID indy_group_start = WK_KLASS_ENUM_NAME(Linkage_klass);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  1970
  WKID indy_group_end   = WK_KLASS_ENUM_NAME(Dynamic_klass);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  1971
  initialize_wk_klasses_until(indy_group_start, scan, CHECK);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  1972
  if (EnableInvokeDynamic) {
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  1973
    initialize_wk_klasses_through(indy_group_start, scan, CHECK);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  1974
  }
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  1975
  if (_well_known_klasses[indy_group_start] == NULL) {
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  1976
    // Skip the rest of the dynamic typing classes, if Linkage is not loaded.
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  1977
    scan = WKID(indy_group_end+1);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  1978
  }
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1979
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1980
  initialize_wk_klasses_until(WKID_LIMIT, scan, CHECK);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1981
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1982
  _box_klasses[T_BOOLEAN] = WK_KLASS(boolean_klass);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1983
  _box_klasses[T_CHAR]    = WK_KLASS(char_klass);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1984
  _box_klasses[T_FLOAT]   = WK_KLASS(float_klass);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1985
  _box_klasses[T_DOUBLE]  = WK_KLASS(double_klass);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1986
  _box_klasses[T_BYTE]    = WK_KLASS(byte_klass);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1987
  _box_klasses[T_SHORT]   = WK_KLASS(short_klass);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1988
  _box_klasses[T_INT]     = WK_KLASS(int_klass);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1989
  _box_klasses[T_LONG]    = WK_KLASS(long_klass);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1990
  //_box_klasses[T_OBJECT]  = WK_KLASS(object_klass);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1991
  //_box_klasses[T_ARRAY]   = WK_KLASS(object_klass);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1992
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1993
#ifdef KERNEL
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1994
  if (sun_jkernel_DownloadManager_klass() == NULL) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1995
    warning("Cannot find sun/jkernel/DownloadManager");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1996
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1997
#endif // KERNEL
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1998
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1999
  { // Compute whether we should use loadClass or loadClassInternal when loading classes.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2000
    methodOop method = instanceKlass::cast(classloader_klass())->find_method(vmSymbols::loadClassInternal_name(), vmSymbols::string_class_signature());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2001
    _has_loadClassInternal = (method != NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2002
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2003
  { // Compute whether we should use checkPackageAccess or NOT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2004
    methodOop method = instanceKlass::cast(classloader_klass())->find_method(vmSymbols::checkPackageAccess_name(), vmSymbols::class_protectiondomain_signature());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2005
    _has_checkPackageAccess = (method != NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2006
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2007
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2008
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2009
// Tells if a given klass is a box (wrapper class, such as java.lang.Integer).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2010
// If so, returns the basic type it holds.  If not, returns T_OBJECT.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2011
BasicType SystemDictionary::box_klass_type(klassOop k) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2012
  assert(k != NULL, "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2013
  for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2014
    if (_box_klasses[i] == k)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2015
      return (BasicType)i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2016
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2017
  return T_OBJECT;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2018
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2019
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2020
KlassHandle SystemDictionaryHandles::box_klass(BasicType t) {
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2021
  if (t >= T_BOOLEAN && t <= T_VOID)
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2022
    return KlassHandle(&SystemDictionary::_box_klasses[t], true);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2023
  else
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2024
    return KlassHandle();
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2025
}
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2026
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2027
// Constraints on class loaders. The details of the algorithm can be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2028
// found in the OOPSLA'98 paper "Dynamic Class Loading in the Java
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2029
// Virtual Machine" by Sheng Liang and Gilad Bracha.  The basic idea is
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2030
// that the system dictionary needs to maintain a set of contraints that
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2031
// must be satisfied by all classes in the dictionary.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2032
// if defining is true, then LinkageError if already in systemDictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2033
// if initiating loader, then ok if instanceKlass matches existing entry
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2034
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2035
void SystemDictionary::check_constraints(int d_index, unsigned int d_hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2036
                                         instanceKlassHandle k,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2037
                                         Handle class_loader, bool defining,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2038
                                         TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2039
  const char *linkage_error = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2040
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2041
    symbolHandle name (THREAD, k->name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2042
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2043
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2044
    klassOop check = find_class(d_index, d_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2045
    if (check != (klassOop)NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2046
      // if different instanceKlass - duplicate class definition,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2047
      // else - ok, class loaded by a different thread in parallel,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2048
      // we should only have found it if it was done loading and ok to use
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2049
      // system dictionary only holds instance classes, placeholders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2050
      // also holds array classes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2051
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2052
      assert(check->klass_part()->oop_is_instance(), "noninstance in systemdictionary");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2053
      if ((defining == true) || (k() != check)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2054
        linkage_error = "loader (instance of  %s): attempted  duplicate class "
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2055
          "definition for name: \"%s\"";
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2056
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2057
        return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2058
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2059
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2060
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2061
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2062
    unsigned int p_hash = placeholders()->compute_hash(name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2063
    int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2064
    symbolOop ph_check = find_placeholder(p_index, p_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2065
    assert(ph_check == NULL || ph_check == name(), "invalid symbol");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2066
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2067
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2068
    if (linkage_error == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2069
      if (constraints()->check_or_update(k, class_loader, name) == false) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2070
        linkage_error = "loader constraint violation: loader (instance of %s)"
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2071
          " previously initiated loading for a different type with name \"%s\"";
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2072
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2073
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2074
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2075
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2076
  // Throw error now if needed (cannot throw while holding
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2077
  // SystemDictionary_lock because of rank ordering)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2078
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2079
  if (linkage_error) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2080
    ResourceMark rm(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2081
    const char* class_loader_name = loader_name(class_loader());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2082
    char* type_name = k->name()->as_C_string();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2083
    size_t buflen = strlen(linkage_error) + strlen(class_loader_name) +
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2084
      strlen(type_name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2085
    char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2086
    jio_snprintf(buf, buflen, linkage_error, class_loader_name, type_name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2087
    THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2088
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2089
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2090
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2091
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2092
// Update system dictionary - done after check_constraint and add_to_hierachy
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2093
// have been called.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2094
void SystemDictionary::update_dictionary(int d_index, unsigned int d_hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2095
                                         int p_index, unsigned int p_hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2096
                                         instanceKlassHandle k,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2097
                                         Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2098
                                         TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2099
  // Compile_lock prevents systemDictionary updates during compilations
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2100
  assert_locked_or_safepoint(Compile_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2101
  symbolHandle name (THREAD, k->name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2102
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2103
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2104
  MutexLocker mu1(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2105
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2106
  // See whether biased locking is enabled and if so set it for this
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2107
  // klass.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2108
  // Note that this must be done past the last potential blocking
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2109
  // point / safepoint. We enable biased locking lazily using a
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2110
  // VM_Operation to iterate the SystemDictionary and installing the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2111
  // biasable mark word into each instanceKlass's prototype header.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2112
  // To avoid race conditions where we accidentally miss enabling the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2113
  // optimization for one class in the process of being added to the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2114
  // dictionary, we must not safepoint after the test of
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2115
  // BiasedLocking::enabled().
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2116
  if (UseBiasedLocking && BiasedLocking::enabled()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2117
    // Set biased locking bit for all loaded classes; it will be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2118
    // cleared if revocation occurs too often for this type
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2119
    // NOTE that we must only do this when the class is initally
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2120
    // defined, not each time it is referenced from a new class loader
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2121
    if (k->class_loader() == class_loader()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2122
      k->set_prototype_header(markOopDesc::biased_locking_prototype());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2123
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2124
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2125
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2126
  // Check for a placeholder. If there, remove it and make a
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2127
  // new system dictionary entry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2128
  placeholders()->find_and_remove(p_index, p_hash, name, class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2129
  klassOop sd_check = find_class(d_index, d_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2130
  if (sd_check == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2131
    dictionary()->add_klass(name, class_loader, k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2132
    notice_modification();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2133
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2134
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2135
  sd_check = find_class(d_index, d_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2136
  assert (sd_check != NULL, "should have entry in system dictionary");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2137
// Changed to allow PH to remain to complete class circularity checking
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2138
// while only one thread can define a class at one time, multiple
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2139
// classes can resolve the superclass for a class at one time,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2140
// and the placeholder is used to track that
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2141
//  symbolOop ph_check = find_placeholder(p_index, p_hash, name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2142
//  assert (ph_check == NULL, "should not have a placeholder entry");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2143
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2144
    SystemDictionary_lock->notify_all();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2145
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2146
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2147
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2148
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2149
klassOop SystemDictionary::find_constrained_instance_or_array_klass(
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2150
                    symbolHandle class_name, Handle class_loader, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2151
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2152
  // First see if it has been loaded directly.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2153
  // Force the protection domain to be null.  (This removes protection checks.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2154
  Handle no_protection_domain;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2155
  klassOop klass = find_instance_or_array_klass(class_name, class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2156
                                                no_protection_domain, CHECK_NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2157
  if (klass != NULL)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2158
    return klass;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2159
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2160
  // Now look to see if it has been loaded elsewhere, and is subject to
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2161
  // a loader constraint that would require this loader to return the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2162
  // klass that is already loaded.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2163
  if (FieldType::is_array(class_name())) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2164
    // Array classes are hard because their klassOops are not kept in the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2165
    // constraint table. The array klass may be constrained, but the elem class
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2166
    // may not be.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2167
    jint dimension;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2168
    symbolOop object_key;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2169
    BasicType t = FieldType::get_array_info(class_name(), &dimension,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2170
                                            &object_key, CHECK_(NULL));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2171
    if (t != T_OBJECT) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2172
      klass = Universe::typeArrayKlassObj(t);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2173
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2174
      symbolHandle elem_name(THREAD, object_key);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2175
      MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2176
      klass = constraints()->find_constrained_elem_klass(class_name, elem_name, class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2177
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2178
    if (klass != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2179
      klass = Klass::cast(klass)->array_klass_or_null(dimension);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2180
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2181
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2182
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2183
    // Non-array classes are easy: simply check the constraint table.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2184
    klass = constraints()->find_constrained_klass(class_name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2185
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2186
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2187
  return klass;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2188
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2189
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2190
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2191
bool SystemDictionary::add_loader_constraint(symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2192
                                             Handle class_loader1,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2193
                                             Handle class_loader2,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2194
                                             Thread* THREAD) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2195
  unsigned int d_hash1 = dictionary()->compute_hash(class_name, class_loader1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2196
  int d_index1 = dictionary()->hash_to_index(d_hash1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2197
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2198
  unsigned int d_hash2 = dictionary()->compute_hash(class_name, class_loader2);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2199
  int d_index2 = dictionary()->hash_to_index(d_hash2);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2200
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2201
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2202
    MutexLocker mu_s(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2203
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2204
    // Better never do a GC while we're holding these oops
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2205
    No_Safepoint_Verifier nosafepoint;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2206
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2207
    klassOop klass1 = find_class(d_index1, d_hash1, class_name, class_loader1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2208
    klassOop klass2 = find_class(d_index2, d_hash2, class_name, class_loader2);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2209
    return constraints()->add_entry(class_name, klass1, class_loader1,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2210
                                    klass2, class_loader2);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2211
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2212
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2213
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2214
// Add entry to resolution error table to record the error when the first
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2215
// attempt to resolve a reference to a class has failed.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2216
void SystemDictionary::add_resolution_error(constantPoolHandle pool, int which, symbolHandle error) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2217
  unsigned int hash = resolution_errors()->compute_hash(pool, which);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2218
  int index = resolution_errors()->hash_to_index(hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2219
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2220
    MutexLocker ml(SystemDictionary_lock, Thread::current());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2221
    resolution_errors()->add_entry(index, hash, pool, which, error);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2222
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2223
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2224
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2225
// Lookup resolution error table. Returns error if found, otherwise NULL.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2226
symbolOop SystemDictionary::find_resolution_error(constantPoolHandle pool, int which) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2227
  unsigned int hash = resolution_errors()->compute_hash(pool, which);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2228
  int index = resolution_errors()->hash_to_index(hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2229
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2230
    MutexLocker ml(SystemDictionary_lock, Thread::current());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2231
    ResolutionErrorEntry* entry = resolution_errors()->find_entry(index, hash, pool, which);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2232
    return (entry != NULL) ? entry->error() : (symbolOop)NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2233
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2234
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2235
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2236
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2237
// Signature constraints ensure that callers and callees agree about
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2238
// the meaning of type names in their signatures.  This routine is the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2239
// intake for constraints.  It collects them from several places:
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2240
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2241
//  * LinkResolver::resolve_method (if check_access is true) requires
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2242
//    that the resolving class (the caller) and the defining class of
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2243
//    the resolved method (the callee) agree on each type in the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2244
//    method's signature.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2245
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2246
//  * LinkResolver::resolve_interface_method performs exactly the same
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2247
//    checks.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2248
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2249
//  * LinkResolver::resolve_field requires that the constant pool
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2250
//    attempting to link to a field agree with the field's defining
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2251
//    class about the type of the field signature.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2252
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2253
//  * klassVtable::initialize_vtable requires that, when a class
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2254
//    overrides a vtable entry allocated by a superclass, that the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2255
//    overriding method (i.e., the callee) agree with the superclass
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2256
//    on each type in the method's signature.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2257
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2258
//  * klassItable::initialize_itable requires that, when a class fills
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2259
//    in its itables, for each non-abstract method installed in an
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2260
//    itable, the method (i.e., the callee) agree with the interface
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2261
//    on each type in the method's signature.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2262
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2263
// All those methods have a boolean (check_access, checkconstraints)
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2264
// which turns off the checks.  This is used from specialized contexts
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2265
// such as bootstrapping, dumping, and debugging.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2266
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2267
// No direct constraint is placed between the class and its
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2268
// supertypes.  Constraints are only placed along linked relations
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2269
// between callers and callees.  When a method overrides or implements
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2270
// an abstract method in a supertype (superclass or interface), the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2271
// constraints are placed as if the supertype were the caller to the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2272
// overriding method.  (This works well, since callers to the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2273
// supertype have already established agreement between themselves and
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2274
// the supertype.)  As a result of all this, a class can disagree with
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2275
// its supertype about the meaning of a type name, as long as that
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2276
// class neither calls a relevant method of the supertype, nor is
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2277
// called (perhaps via an override) from the supertype.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2278
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2279
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2280
// SystemDictionary::check_signature_loaders(sig, l1, l2)
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2281
//
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2282
// Make sure all class components (including arrays) in the given
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2283
// signature will be resolved to the same class in both loaders.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2284
// Returns the name of the type that failed a loader constraint check, or
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2285
// NULL if no constraint failed. The returned C string needs cleaning up
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2286
// with a ResourceMark in the caller.  No exception except OOME is thrown.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2287
char* SystemDictionary::check_signature_loaders(symbolHandle signature,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2288
                                               Handle loader1, Handle loader2,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2289
                                               bool is_method, TRAPS)  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2290
  // Nothing to do if loaders are the same.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2291
  if (loader1() == loader2()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2292
    return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2293
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2294
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2295
  SignatureStream sig_strm(signature, is_method);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2296
  while (!sig_strm.is_done()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2297
    if (sig_strm.is_object()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2298
      symbolOop s = sig_strm.as_symbol(CHECK_NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2299
      symbolHandle sig (THREAD, s);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2300
      if (!add_loader_constraint(sig, loader1, loader2, THREAD)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2301
        return sig()->as_C_string();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2302
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2303
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2304
    sig_strm.next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2305
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2306
  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2307
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2308
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2309
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2310
methodOop SystemDictionary::find_method_handle_invoke(symbolHandle signature,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2311
                                                      Handle class_loader,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2312
                                                      Handle protection_domain,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2313
                                                      TRAPS) {
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2314
  if (!EnableMethodHandles)  return NULL;
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2315
  assert(class_loader.is_null() && protection_domain.is_null(),
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2316
         "cannot load specialized versions of MethodHandle.invoke");
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2317
  if (invoke_method_table() == NULL) {
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2318
    // create this side table lazily
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2319
    _invoke_method_table = new SymbolPropertyTable(_invoke_method_size);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2320
  }
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2321
  unsigned int hash  = invoke_method_table()->compute_hash(signature);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2322
  int          index = invoke_method_table()->hash_to_index(hash);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2323
  SymbolPropertyEntry* spe = invoke_method_table()->find_entry(index, hash, signature);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2324
  if (spe == NULL || spe->property_oop() == NULL) {
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2325
    // Must create lots of stuff here, but outside of the SystemDictionary lock.
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2326
    Handle mt = compute_method_handle_type(signature(),
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2327
                                           class_loader, protection_domain,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2328
                                           CHECK_NULL);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2329
    KlassHandle  mh_klass = SystemDictionaryHandles::MethodHandle_klass();
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2330
    methodHandle m = methodOopDesc::make_invoke_method(mh_klass, signature,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2331
                                                       mt, CHECK_NULL);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2332
    // Now grab the lock.  We might have to throw away the new method,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2333
    // if a racing thread has managed to install one at the same time.
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2334
    {
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2335
      MutexLocker ml(SystemDictionary_lock, Thread::current());
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2336
      spe = invoke_method_table()->find_entry(index, hash, signature);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2337
      if (spe == NULL)
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2338
        spe = invoke_method_table()->add_entry(index, hash, signature);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2339
      if (spe->property_oop() == NULL)
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2340
        spe->set_property_oop(m());
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2341
    }
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2342
  }
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2343
  methodOop m = (methodOop) spe->property_oop();
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2344
  assert(m->is_method(), "");
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2345
  return m;
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2346
}
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2347
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2348
// Ask Java code to find or construct a java.dyn.MethodType for the given
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2349
// signature, as interpreted relative to the given class loader.
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2350
// Because of class loader constraints, all method handle usage must be
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2351
// consistent with this loader.
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2352
Handle SystemDictionary::compute_method_handle_type(symbolHandle signature,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2353
                                                    Handle class_loader,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2354
                                                    Handle protection_domain,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2355
                                                    TRAPS) {
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2356
  Handle empty;
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2357
  int npts = ArgumentCount(signature()).size();
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2358
  objArrayHandle pts = oopFactory::new_objArray(SystemDictionary::class_klass(), npts, CHECK_(empty));
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2359
  int arg = 0;
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2360
  Handle rt;                            // the return type from the signature
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2361
  for (SignatureStream ss(signature()); !ss.is_done(); ss.next()) {
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2362
    oop mirror;
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2363
    if (!ss.is_object()) {
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2364
      mirror = Universe::java_mirror(ss.type());
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2365
    } else {
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2366
      symbolOop    name_oop = ss.as_symbol(CHECK_(empty));
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2367
      symbolHandle name(THREAD, name_oop);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2368
      klassOop klass = resolve_or_fail(name,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2369
                                       class_loader, protection_domain,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2370
                                       true, CHECK_(empty));
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2371
      mirror = Klass::cast(klass)->java_mirror();
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2372
    }
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2373
    if (ss.at_return_type())
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2374
      rt = Handle(THREAD, mirror);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2375
    else
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2376
      pts->obj_at_put(arg++, mirror);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2377
  }
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2378
  assert(arg == npts, "");
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2379
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2380
  // call MethodType java.dyn.MethodType::makeImpl(Class rt, Class[] pts, false, true)
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2381
  bool varargs = false, trusted = true;
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2382
  JavaCallArguments args(Handle(THREAD, rt()));
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2383
  args.push_oop(pts());
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2384
  args.push_int(false);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2385
  args.push_int(trusted);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2386
  JavaValue result(T_OBJECT);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2387
  JavaCalls::call_static(&result,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2388
                         SystemDictionary::MethodType_klass(),
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2389
                         vmSymbols::makeImpl_name(), vmSymbols::makeImpl_signature(),
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2390
                         &args, CHECK_(empty));
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2391
  return Handle(THREAD, (oop) result.get_jobject());
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2392
}
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2393
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2394
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2395
// Ask Java code to find or construct a java.dyn.CallSite for the given
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2396
// name and signature, as interpreted relative to the given class loader.
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2397
Handle SystemDictionary::make_dynamic_call_site(KlassHandle caller,
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2398
                                                int caller_method_idnum,
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2399
                                                int caller_bci,
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2400
                                                symbolHandle name,
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2401
                                                methodHandle mh_invdyn,
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2402
                                                TRAPS) {
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2403
  Handle empty;
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2404
  // call sun.dyn.CallSiteImpl::makeSite(caller, name, mtype, cmid, cbci)
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2405
  oop name_str_oop = StringTable::intern(name(), CHECK_(empty)); // not a handle!
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2406
  JavaCallArguments args(Handle(THREAD, caller->java_mirror()));
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2407
  args.push_oop(name_str_oop);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2408
  args.push_oop(mh_invdyn->method_handle_type());
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2409
  args.push_int(caller_method_idnum);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2410
  args.push_int(caller_bci);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2411
  JavaValue result(T_OBJECT);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2412
  JavaCalls::call_static(&result,
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2413
                         SystemDictionary::CallSiteImpl_klass(),
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2414
                         vmSymbols::makeSite_name(), vmSymbols::makeSite_signature(),
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2415
                         &args, CHECK_(empty));
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2416
  oop call_site_oop = (oop) result.get_jobject();
3908
24b55ad4c228 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 3575
diff changeset
  2417
  assert(call_site_oop->is_oop()
24b55ad4c228 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 3575
diff changeset
  2418
         /*&& sun_dyn_CallSiteImpl::is_instance(call_site_oop)*/, "must be sane");
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2419
  sun_dyn_CallSiteImpl::set_vmmethod(call_site_oop, mh_invdyn());
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2420
  if (TraceMethodHandles) {
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2421
    tty->print_cr("Linked invokedynamic bci=%d site="INTPTR_FORMAT":", caller_bci, call_site_oop);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2422
    call_site_oop->print();
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2423
    tty->cr();
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2424
  }
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2425
  return call_site_oop;
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2426
}
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2427
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2428
Handle SystemDictionary::find_bootstrap_method(KlassHandle caller,
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2429
                                               KlassHandle search_bootstrap_klass,
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2430
                                               TRAPS) {
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2431
  Handle empty;
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2432
  if (!caller->oop_is_instance())  return empty;
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2433
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2434
  instanceKlassHandle ik(THREAD, caller());
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2435
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2436
  if (ik->bootstrap_method() != NULL) {
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2437
    return Handle(THREAD, ik->bootstrap_method());
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2438
  }
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2439
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2440
  // call java.dyn.Linkage::findBootstrapMethod(caller, sbk)
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2441
  JavaCallArguments args(Handle(THREAD, ik->java_mirror()));
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2442
  if (search_bootstrap_klass.is_null())
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2443
    args.push_oop(Handle());
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2444
  else
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2445
    args.push_oop(search_bootstrap_klass->java_mirror());
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2446
  JavaValue result(T_OBJECT);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2447
  JavaCalls::call_static(&result,
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2448
                         SystemDictionary::Linkage_klass(),
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2449
                         vmSymbols::findBootstrapMethod_name(),
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2450
                         vmSymbols::findBootstrapMethod_signature(),
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2451
                         &args, CHECK_(empty));
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2452
  oop boot_method_oop = (oop) result.get_jobject();
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2453
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2454
  if (boot_method_oop != NULL) {
3908
24b55ad4c228 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 3575
diff changeset
  2455
    assert(boot_method_oop->is_oop()
24b55ad4c228 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 3575
diff changeset
  2456
           && java_dyn_MethodHandle::is_instance(boot_method_oop), "must be sane");
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2457
    // probably no race conditions, but let's be careful:
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2458
    if (Atomic::cmpxchg_ptr(boot_method_oop, ik->adr_bootstrap_method(), NULL) == NULL)
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2459
      ik->set_bootstrap_method(boot_method_oop);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2460
    else
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2461
      boot_method_oop = ik->bootstrap_method();
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2462
  } else {
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2463
    boot_method_oop = ik->bootstrap_method();
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2464
  }
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2465
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2466
  return Handle(THREAD, boot_method_oop);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2467
}
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2468
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2469
// Since the identity hash code for symbols changes when the symbols are
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2470
// moved from the regular perm gen (hash in the mark word) to the shared
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2471
// spaces (hash is the address), the classes loaded into the dictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2472
// may be in the wrong buckets.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2473
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2474
void SystemDictionary::reorder_dictionary() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2475
  dictionary()->reorder_dictionary();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2476
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2477
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2478
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2479
void SystemDictionary::copy_buckets(char** top, char* end) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2480
  dictionary()->copy_buckets(top, end);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2481
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2482
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2483
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2484
void SystemDictionary::copy_table(char** top, char* end) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2485
  dictionary()->copy_table(top, end);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2486
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2487
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2488
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2489
void SystemDictionary::reverse() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2490
  dictionary()->reverse();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2491
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2492
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2493
int SystemDictionary::number_of_classes() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2494
  return dictionary()->number_of_entries();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2495
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2496
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2497
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2498
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2499
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2500
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2501
void SystemDictionary::print() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2502
  dictionary()->print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2503
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2504
  // Placeholders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2505
  GCMutexLocker mu(SystemDictionary_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2506
  placeholders()->print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2507
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2508
  // loader constraints - print under SD_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2509
  constraints()->print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2510
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2511
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2512
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2513
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2514
void SystemDictionary::verify() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2515
  guarantee(dictionary() != NULL, "Verify of system dictionary failed");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2516
  guarantee(constraints() != NULL,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2517
            "Verify of loader constraints failed");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2518
  guarantee(dictionary()->number_of_entries() >= 0 &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2519
            placeholders()->number_of_entries() >= 0,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2520
            "Verify of system dictionary failed");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2521
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2522
  // Verify dictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2523
  dictionary()->verify();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2524
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2525
  GCMutexLocker mu(SystemDictionary_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2526
  placeholders()->verify();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2527
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2528
  // Verify constraint table
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2529
  guarantee(constraints() != NULL, "Verify of loader constraints failed");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2530
  constraints()->verify(dictionary());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2531
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2532
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2533
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2534
void SystemDictionary::verify_obj_klass_present(Handle obj,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2535
                                                symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2536
                                                Handle class_loader) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2537
  GCMutexLocker mu(SystemDictionary_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2538
  oop probe = find_class_or_placeholder(class_name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2539
  if (probe == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2540
    probe = SystemDictionary::find_shared_class(class_name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2541
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2542
  guarantee(probe != NULL &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2543
            (!probe->is_klass() || probe == obj()),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2544
                     "Loaded klasses should be in SystemDictionary");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2545
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2546
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2547
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2548
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2549
// statistics code
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2550
class ClassStatistics: AllStatic {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2551
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2552
  static int nclasses;        // number of classes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2553
  static int nmethods;        // number of methods
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2554
  static int nmethoddata;     // number of methodData
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2555
  static int class_size;      // size of class objects in words
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2556
  static int method_size;     // size of method objects in words
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2557
  static int debug_size;      // size of debug info in methods
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2558
  static int methoddata_size; // size of methodData objects in words
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2559
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2560
  static void do_class(klassOop k) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2561
    nclasses++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2562
    class_size += k->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2563
    if (k->klass_part()->oop_is_instance()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2564
      instanceKlass* ik = (instanceKlass*)k->klass_part();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2565
      class_size += ik->methods()->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2566
      class_size += ik->constants()->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2567
      class_size += ik->local_interfaces()->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2568
      class_size += ik->transitive_interfaces()->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2569
      // We do not have to count implementors, since we only store one!
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2570
      class_size += ik->fields()->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2571
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2572
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2573
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2574
  static void do_method(methodOop m) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2575
    nmethods++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2576
    method_size += m->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2577
    // class loader uses same objArray for empty vectors, so don't count these
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2578
    if (m->exception_table()->length() != 0)   method_size += m->exception_table()->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2579
    if (m->has_stackmap_table()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2580
      method_size += m->stackmap_data()->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2581
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2582
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2583
    methodDataOop mdo = m->method_data();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2584
    if (mdo != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2585
      nmethoddata++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2586
      methoddata_size += mdo->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2587
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2588
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2589
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2590
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2591
  static void print() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2592
    SystemDictionary::classes_do(do_class);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2593
    SystemDictionary::methods_do(do_method);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2594
    tty->print_cr("Class statistics:");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2595
    tty->print_cr("%d classes (%d bytes)", nclasses, class_size * oopSize);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2596
    tty->print_cr("%d methods (%d bytes = %d base + %d debug info)", nmethods,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2597
                  (method_size + debug_size) * oopSize, method_size * oopSize, debug_size * oopSize);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2598
    tty->print_cr("%d methoddata (%d bytes)", nmethoddata, methoddata_size * oopSize);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2599
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2600
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2601
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2602
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2603
int ClassStatistics::nclasses        = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2604
int ClassStatistics::nmethods        = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2605
int ClassStatistics::nmethoddata     = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2606
int ClassStatistics::class_size      = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2607
int ClassStatistics::method_size     = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2608
int ClassStatistics::debug_size      = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2609
int ClassStatistics::methoddata_size = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2610
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2611
void SystemDictionary::print_class_statistics() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2612
  ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2613
  ClassStatistics::print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2614
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2615
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2616
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2617
class MethodStatistics: AllStatic {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2618
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2619
  enum {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2620
    max_parameter_size = 10
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2621
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2622
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2623
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2624
  static int _number_of_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2625
  static int _number_of_final_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2626
  static int _number_of_static_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2627
  static int _number_of_native_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2628
  static int _number_of_synchronized_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2629
  static int _number_of_profiled_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2630
  static int _number_of_bytecodes;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2631
  static int _parameter_size_profile[max_parameter_size];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2632
  static int _bytecodes_profile[Bytecodes::number_of_java_codes];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2633
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2634
  static void initialize() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2635
    _number_of_methods        = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2636
    _number_of_final_methods  = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2637
    _number_of_static_methods = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2638
    _number_of_native_methods = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2639
    _number_of_synchronized_methods = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2640
    _number_of_profiled_methods = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2641
    _number_of_bytecodes      = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2642
    for (int i = 0; i < max_parameter_size             ; i++) _parameter_size_profile[i] = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2643
    for (int j = 0; j < Bytecodes::number_of_java_codes; j++) _bytecodes_profile     [j] = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2644
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2645
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2646
  static void do_method(methodOop m) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2647
    _number_of_methods++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2648
    // collect flag info
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2649
    if (m->is_final()       ) _number_of_final_methods++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2650
    if (m->is_static()      ) _number_of_static_methods++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2651
    if (m->is_native()      ) _number_of_native_methods++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2652
    if (m->is_synchronized()) _number_of_synchronized_methods++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2653
    if (m->method_data() != NULL) _number_of_profiled_methods++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2654
    // collect parameter size info (add one for receiver, if any)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2655
    _parameter_size_profile[MIN2(m->size_of_parameters() + (m->is_static() ? 0 : 1), max_parameter_size - 1)]++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2656
    // collect bytecodes info
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2657
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2658
      Thread *thread = Thread::current();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2659
      HandleMark hm(thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2660
      BytecodeStream s(methodHandle(thread, m));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2661
      Bytecodes::Code c;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2662
      while ((c = s.next()) >= 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2663
        _number_of_bytecodes++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2664
        _bytecodes_profile[c]++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2665
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2666
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2667
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2668
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2669
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2670
  static void print() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2671
    initialize();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2672
    SystemDictionary::methods_do(do_method);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2673
    // generate output
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2674
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2675
    tty->print_cr("Method statistics (static):");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2676
    // flag distribution
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2677
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2678
    tty->print_cr("%6d final        methods  %6.1f%%", _number_of_final_methods       , _number_of_final_methods        * 100.0F / _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2679
    tty->print_cr("%6d static       methods  %6.1f%%", _number_of_static_methods      , _number_of_static_methods       * 100.0F / _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2680
    tty->print_cr("%6d native       methods  %6.1f%%", _number_of_native_methods      , _number_of_native_methods       * 100.0F / _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2681
    tty->print_cr("%6d synchronized methods  %6.1f%%", _number_of_synchronized_methods, _number_of_synchronized_methods * 100.0F / _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2682
    tty->print_cr("%6d profiled     methods  %6.1f%%", _number_of_profiled_methods, _number_of_profiled_methods * 100.0F / _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2683
    // parameter size profile
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2684
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2685
    { int tot = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2686
      int avg = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2687
      for (int i = 0; i < max_parameter_size; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2688
        int n = _parameter_size_profile[i];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2689
        tot += n;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2690
        avg += n*i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2691
        tty->print_cr("parameter size = %1d: %6d methods  %5.1f%%", i, n, n * 100.0F / _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2692
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2693
      assert(tot == _number_of_methods, "should be the same");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2694
      tty->print_cr("                    %6d methods  100.0%%", _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2695
      tty->print_cr("(average parameter size = %3.1f including receiver, if any)", (float)avg / _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2696
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2697
    // bytecodes profile
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2698
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2699
    { int tot = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2700
      for (int i = 0; i < Bytecodes::number_of_java_codes; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2701
        if (Bytecodes::is_defined(i)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2702
          Bytecodes::Code c = Bytecodes::cast(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2703
          int n = _bytecodes_profile[c];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2704
          tot += n;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2705
          tty->print_cr("%9d  %7.3f%%  %s", n, n * 100.0F / _number_of_bytecodes, Bytecodes::name(c));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2706
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2707
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2708
      assert(tot == _number_of_bytecodes, "should be the same");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2709
      tty->print_cr("%9d  100.000%%", _number_of_bytecodes);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2710
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2711
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2712
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2713
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2714
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2715
int MethodStatistics::_number_of_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2716
int MethodStatistics::_number_of_final_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2717
int MethodStatistics::_number_of_static_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2718
int MethodStatistics::_number_of_native_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2719
int MethodStatistics::_number_of_synchronized_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2720
int MethodStatistics::_number_of_profiled_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2721
int MethodStatistics::_number_of_bytecodes;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2722
int MethodStatistics::_parameter_size_profile[MethodStatistics::max_parameter_size];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2723
int MethodStatistics::_bytecodes_profile[Bytecodes::number_of_java_codes];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2724
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2725
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2726
void SystemDictionary::print_method_statistics() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2727
  MethodStatistics::print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2728
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2729
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2730
#endif // PRODUCT