hotspot/src/share/vm/memory/universe.cpp
author coleenp
Fri, 07 Sep 2012 12:04:16 -0400
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7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass Summary: Simple renaming to be consistent with instanceKlass->InstanceKlass renaming Reviewed-by: stefank, jmasa
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/*
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 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "classfile/classLoader.hpp"
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#include "classfile/classLoaderData.hpp"
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#include "classfile/javaClasses.hpp"
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#include "classfile/symbolTable.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "classfile/vmSymbols.hpp"
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#include "code/codeCache.hpp"
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#include "code/dependencies.hpp"
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#include "gc_interface/collectedHeap.inline.hpp"
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#include "interpreter/interpreter.hpp"
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#include "memory/cardTableModRefBS.hpp"
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#include "memory/gcLocker.inline.hpp"
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#include "memory/genCollectedHeap.hpp"
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#include "memory/genRemSet.hpp"
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#include "memory/generation.hpp"
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#include "memory/metadataFactory.hpp"
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#include "memory/metaspaceShared.hpp"
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#include "memory/oopFactory.hpp"
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#include "memory/space.hpp"
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#include "memory/universe.hpp"
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#include "memory/universe.inline.hpp"
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#include "oops/constantPool.hpp"
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#include "oops/instanceClassLoaderKlass.hpp"
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#include "oops/instanceKlass.hpp"
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#include "oops/instanceMirrorKlass.hpp"
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#include "oops/instanceRefKlass.hpp"
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#include "oops/oop.inline.hpp"
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#include "oops/typeArrayKlass.hpp"
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#include "prims/jvmtiRedefineClassesTrace.hpp"
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#include "runtime/aprofiler.hpp"
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#include "runtime/arguments.hpp"
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#include "runtime/deoptimization.hpp"
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#include "runtime/fprofiler.hpp"
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#include "runtime/handles.inline.hpp"
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#include "runtime/init.hpp"
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#include "runtime/java.hpp"
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#include "runtime/javaCalls.hpp"
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#include "runtime/sharedRuntime.hpp"
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#include "runtime/synchronizer.hpp"
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#include "runtime/timer.hpp"
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#include "runtime/vm_operations.hpp"
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#include "services/memoryService.hpp"
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#include "utilities/copy.hpp"
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#include "utilities/events.hpp"
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#include "utilities/hashtable.inline.hpp"
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#include "utilities/preserveException.hpp"
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#ifdef TARGET_OS_FAMILY_linux
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# include "thread_linux.inline.hpp"
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#endif
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#ifdef TARGET_OS_FAMILY_solaris
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# include "thread_solaris.inline.hpp"
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#endif
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#ifdef TARGET_OS_FAMILY_windows
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# include "thread_windows.inline.hpp"
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#endif
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#ifdef TARGET_OS_FAMILY_bsd
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# include "thread_bsd.inline.hpp"
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#endif
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#ifndef SERIALGC
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#include "gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.hpp"
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#include "gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.hpp"
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#include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
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#include "gc_implementation/g1/g1CollectorPolicy.hpp"
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#include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"
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#endif
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// Known objects
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Klass* Universe::_boolArrayKlassObj                 = NULL;
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Klass* Universe::_byteArrayKlassObj                 = NULL;
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Klass* Universe::_charArrayKlassObj                 = NULL;
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Klass* Universe::_intArrayKlassObj                  = NULL;
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Klass* Universe::_shortArrayKlassObj                = NULL;
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Klass* Universe::_longArrayKlassObj                 = NULL;
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Klass* Universe::_singleArrayKlassObj               = NULL;
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Klass* Universe::_doubleArrayKlassObj               = NULL;
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Klass* Universe::_typeArrayKlassObjs[T_VOID+1]      = { NULL /*, NULL...*/ };
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Klass* Universe::_objectArrayKlassObj               = NULL;
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oop Universe::_int_mirror                             = NULL;
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oop Universe::_float_mirror                           = NULL;
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oop Universe::_double_mirror                          = NULL;
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oop Universe::_byte_mirror                            = NULL;
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oop Universe::_bool_mirror                            = NULL;
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oop Universe::_char_mirror                            = NULL;
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oop Universe::_long_mirror                            = NULL;
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oop Universe::_short_mirror                           = NULL;
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oop Universe::_void_mirror                            = NULL;
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oop Universe::_mirrors[T_VOID+1]                      = { NULL /*, NULL...*/ };
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oop Universe::_main_thread_group                      = NULL;
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oop Universe::_system_thread_group                    = NULL;
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objArrayOop Universe::_the_empty_class_klass_array    = NULL;
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Array<Klass*>* Universe::_the_array_interfaces_array = NULL;
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oop Universe::_the_null_string                        = NULL;
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oop Universe::_the_min_jint_string                   = NULL;
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LatestMethodOopCache* Universe::_finalizer_register_cache = NULL;
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ActiveMethodOopsCache* Universe::_reflect_invoke_cache    = NULL;
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oop Universe::_out_of_memory_error_java_heap          = NULL;
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oop Universe::_out_of_memory_error_perm_gen           = NULL;
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oop Universe::_out_of_memory_error_array_size         = NULL;
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oop Universe::_out_of_memory_error_gc_overhead_limit  = NULL;
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objArrayOop Universe::_preallocated_out_of_memory_error_array = NULL;
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volatile jint Universe::_preallocated_out_of_memory_error_avail_count = 0;
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bool Universe::_verify_in_progress                    = false;
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oop Universe::_null_ptr_exception_instance            = NULL;
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oop Universe::_arithmetic_exception_instance          = NULL;
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oop Universe::_virtual_machine_error_instance         = NULL;
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oop Universe::_vm_exception                           = NULL;
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Array<int>* Universe::_the_empty_int_array            = NULL;
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Array<u2>* Universe::_the_empty_short_array           = NULL;
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Array<Klass*>* Universe::_the_empty_klass_array     = NULL;
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Array<Method*>* Universe::_the_empty_method_array   = NULL;
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// These variables are guarded by FullGCALot_lock.
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debug_only(objArrayOop Universe::_fullgc_alot_dummy_array = NULL;)
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debug_only(int Universe::_fullgc_alot_dummy_next      = 0;)
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// Heap
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int             Universe::_verify_count = 0;
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int             Universe::_base_vtable_size = 0;
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bool            Universe::_bootstrapping = false;
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bool            Universe::_fully_initialized = false;
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size_t          Universe::_heap_capacity_at_last_gc;
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size_t          Universe::_heap_used_at_last_gc = 0;
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CollectedHeap*  Universe::_collectedHeap = NULL;
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NarrowOopStruct Universe::_narrow_oop = { NULL, 0, true };
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void Universe::basic_type_classes_do(void f(Klass*)) {
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  f(boolArrayKlassObj());
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  f(byteArrayKlassObj());
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  f(charArrayKlassObj());
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  f(intArrayKlassObj());
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  f(shortArrayKlassObj());
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  f(longArrayKlassObj());
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  f(singleArrayKlassObj());
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  f(doubleArrayKlassObj());
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}
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void Universe::oops_do(OopClosure* f, bool do_all) {
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  f->do_oop((oop*) &_int_mirror);
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  f->do_oop((oop*) &_float_mirror);
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  f->do_oop((oop*) &_double_mirror);
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  f->do_oop((oop*) &_byte_mirror);
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  f->do_oop((oop*) &_bool_mirror);
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  f->do_oop((oop*) &_char_mirror);
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  f->do_oop((oop*) &_long_mirror);
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  f->do_oop((oop*) &_short_mirror);
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  f->do_oop((oop*) &_void_mirror);
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  for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
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    f->do_oop((oop*) &_mirrors[i]);
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  }
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  assert(_mirrors[0] == NULL && _mirrors[T_BOOLEAN - 1] == NULL, "checking");
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  f->do_oop((oop*)&_the_empty_class_klass_array);
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  f->do_oop((oop*)&_the_null_string);
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  f->do_oop((oop*)&_the_min_jint_string);
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  f->do_oop((oop*)&_out_of_memory_error_java_heap);
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  f->do_oop((oop*)&_out_of_memory_error_perm_gen);
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  f->do_oop((oop*)&_out_of_memory_error_array_size);
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  f->do_oop((oop*)&_out_of_memory_error_gc_overhead_limit);
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    f->do_oop((oop*)&_preallocated_out_of_memory_error_array);
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  f->do_oop((oop*)&_null_ptr_exception_instance);
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  f->do_oop((oop*)&_arithmetic_exception_instance);
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  f->do_oop((oop*)&_virtual_machine_error_instance);
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  f->do_oop((oop*)&_main_thread_group);
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  f->do_oop((oop*)&_system_thread_group);
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  f->do_oop((oop*)&_vm_exception);
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  debug_only(f->do_oop((oop*)&_fullgc_alot_dummy_array);)
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}
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// Serialize metadata in and out of CDS archive, not oops.
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void Universe::serialize(SerializeClosure* f, bool do_all) {
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  f->do_ptr((void**)&_boolArrayKlassObj);
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  f->do_ptr((void**)&_byteArrayKlassObj);
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  f->do_ptr((void**)&_charArrayKlassObj);
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  f->do_ptr((void**)&_intArrayKlassObj);
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  f->do_ptr((void**)&_shortArrayKlassObj);
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  f->do_ptr((void**)&_longArrayKlassObj);
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  f->do_ptr((void**)&_singleArrayKlassObj);
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  f->do_ptr((void**)&_doubleArrayKlassObj);
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  f->do_ptr((void**)&_objectArrayKlassObj);
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  {
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    for (int i = 0; i < T_VOID+1; i++) {
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      if (_typeArrayKlassObjs[i] != NULL) {
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        assert(i >= T_BOOLEAN, "checking");
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        f->do_ptr((void**)&_typeArrayKlassObjs[i]);
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      } else if (do_all) {
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        f->do_ptr((void**)&_typeArrayKlassObjs[i]);
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      }
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    }
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  }
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  f->do_ptr((void**)&_the_array_interfaces_array);
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  f->do_ptr((void**)&_the_empty_int_array);
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  f->do_ptr((void**)&_the_empty_short_array);
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  f->do_ptr((void**)&_the_empty_method_array);
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  f->do_ptr((void**)&_the_empty_klass_array);
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  _finalizer_register_cache->serialize(f);
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  _reflect_invoke_cache->serialize(f);
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}
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void Universe::check_alignment(uintx size, uintx alignment, const char* name) {
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  if (size < alignment || size % alignment != 0) {
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    ResourceMark rm;
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    stringStream st;
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    st.print("Size of %s (%ld bytes) must be aligned to %ld bytes", name, size, alignment);
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    char* error = st.as_string();
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    vm_exit_during_initialization(error);
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  }
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}
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void initialize_basic_type_klass(Klass* k, TRAPS) {
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  Klass* ok = SystemDictionary::Object_klass();
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  if (UseSharedSpaces) {
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    assert(k->super() == ok, "u3");
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    k->restore_unshareable_info(CHECK);
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  } else {
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    k->initialize_supers(ok, CHECK);
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  }
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  k->append_to_sibling_list();
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}
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void Universe::genesis(TRAPS) {
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  ResourceMark rm;
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  { FlagSetting fs(_bootstrapping, true);
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    { MutexLocker mc(Compile_lock);
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      // determine base vtable size; without that we cannot create the array klasses
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      compute_base_vtable_size();
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      if (!UseSharedSpaces) {
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        _boolArrayKlassObj      = typeArrayKlass::create_klass(T_BOOLEAN, sizeof(jboolean), CHECK);
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        _charArrayKlassObj      = typeArrayKlass::create_klass(T_CHAR,    sizeof(jchar),    CHECK);
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        _singleArrayKlassObj    = typeArrayKlass::create_klass(T_FLOAT,   sizeof(jfloat),   CHECK);
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        _doubleArrayKlassObj    = typeArrayKlass::create_klass(T_DOUBLE,  sizeof(jdouble),  CHECK);
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        _byteArrayKlassObj      = typeArrayKlass::create_klass(T_BYTE,    sizeof(jbyte),    CHECK);
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        _shortArrayKlassObj     = typeArrayKlass::create_klass(T_SHORT,   sizeof(jshort),   CHECK);
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        _intArrayKlassObj       = typeArrayKlass::create_klass(T_INT,     sizeof(jint),     CHECK);
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        _longArrayKlassObj      = typeArrayKlass::create_klass(T_LONG,    sizeof(jlong),    CHECK);
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        _typeArrayKlassObjs[T_BOOLEAN] = _boolArrayKlassObj;
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        _typeArrayKlassObjs[T_CHAR]    = _charArrayKlassObj;
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        _typeArrayKlassObjs[T_FLOAT]   = _singleArrayKlassObj;
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        _typeArrayKlassObjs[T_DOUBLE]  = _doubleArrayKlassObj;
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        _typeArrayKlassObjs[T_BYTE]    = _byteArrayKlassObj;
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        _typeArrayKlassObjs[T_SHORT]   = _shortArrayKlassObj;
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        _typeArrayKlassObjs[T_INT]     = _intArrayKlassObj;
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        _typeArrayKlassObjs[T_LONG]    = _longArrayKlassObj;
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        ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data();
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        _the_array_interfaces_array = MetadataFactory::new_array<Klass*>(null_cld, 2, NULL, CHECK);
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        _the_empty_int_array        = MetadataFactory::new_array<int>(null_cld, 0, CHECK);
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        _the_empty_short_array      = MetadataFactory::new_array<u2>(null_cld, 0, CHECK);
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        _the_empty_method_array     = MetadataFactory::new_array<Method*>(null_cld, 0, CHECK);
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        _the_empty_klass_array      = MetadataFactory::new_array<Klass*>(null_cld, 0, CHECK);
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      }
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    }
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    vmSymbols::initialize(CHECK);
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    SystemDictionary::initialize(CHECK);
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    Klass* ok = SystemDictionary::Object_klass();
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    _the_null_string            = StringTable::intern("null", CHECK);
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    _the_min_jint_string       = StringTable::intern("-2147483648", CHECK);
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    if (UseSharedSpaces) {
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      // Verify shared interfaces array.
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      assert(_the_array_interfaces_array->at(0) ==
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             SystemDictionary::Cloneable_klass(), "u3");
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      assert(_the_array_interfaces_array->at(1) ==
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             SystemDictionary::Serializable_klass(), "u3");
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    } else {
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      // Set up shared interfaces array.  (Do this before supers are set up.)
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      _the_array_interfaces_array->at_put(0, SystemDictionary::Cloneable_klass());
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      _the_array_interfaces_array->at_put(1, SystemDictionary::Serializable_klass());
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    }
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    initialize_basic_type_klass(boolArrayKlassObj(), CHECK);
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    initialize_basic_type_klass(charArrayKlassObj(), CHECK);
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    initialize_basic_type_klass(singleArrayKlassObj(), CHECK);
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    initialize_basic_type_klass(doubleArrayKlassObj(), CHECK);
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   319
    initialize_basic_type_klass(byteArrayKlassObj(), CHECK);
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    initialize_basic_type_klass(shortArrayKlassObj(), CHECK);
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   321
    initialize_basic_type_klass(intArrayKlassObj(), CHECK);
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   322
    initialize_basic_type_klass(longArrayKlassObj(), CHECK);
1
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  } // end of core bootstrapping
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   324
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   325
  // Maybe this could be lifted up now that object array can be initialized
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   326
  // during the bootstrapping.
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   327
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  // OLD
1
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   329
  // Initialize _objectArrayKlass after core bootstraping to make
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  // sure the super class is set up properly for _objectArrayKlass.
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   331
  // ---
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   332
  // NEW
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   333
  // Since some of the old system object arrays have been converted to
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   334
  // ordinary object arrays, _objectArrayKlass will be loaded when
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   335
  // SystemDictionary::initialize(CHECK); is run. See the extra check
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   336
  // for Object_klass_loaded in objArrayKlassKlass::allocate_objArray_klass_impl.
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  _objectArrayKlassObj = InstanceKlass::
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    cast(SystemDictionary::Object_klass())->array_klass(1, CHECK);
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  // OLD
1
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  // Add the class to the class hierarchy manually to make sure that
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   341
  // its vtable is initialized after core bootstrapping is completed.
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   342
  // ---
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   343
  // New
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  // Have already been initialized.
1
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  Klass::cast(_objectArrayKlassObj)->append_to_sibling_list();
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   346
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   347
  // Compute is_jdk version flags.
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   348
  // Only 1.3 or later has the java.lang.Shutdown class.
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   349
  // Only 1.4 or later has the java.lang.CharSequence interface.
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   350
  // Only 1.5 or later has the java.lang.management.MemoryUsage class.
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  if (JDK_Version::is_partially_initialized()) {
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   352
    uint8_t jdk_version;
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   353
    Klass* k = SystemDictionary::resolve_or_null(
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   354
        vmSymbols::java_lang_management_MemoryUsage(), THREAD);
1
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   355
    CLEAR_PENDING_EXCEPTION; // ignore exceptions
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   356
    if (k == NULL) {
950
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   357
      k = SystemDictionary::resolve_or_null(
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   358
          vmSymbols::java_lang_CharSequence(), THREAD);
1
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   359
      CLEAR_PENDING_EXCEPTION; // ignore exceptions
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   360
      if (k == NULL) {
950
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diff changeset
   361
        k = SystemDictionary::resolve_or_null(
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   362
            vmSymbols::java_lang_Shutdown(), THREAD);
1
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   363
        CLEAR_PENDING_EXCEPTION; // ignore exceptions
489c9b5090e2 Initial load
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diff changeset
   364
        if (k == NULL) {
950
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diff changeset
   365
          jdk_version = 2;
1
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   366
        } else {
950
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   367
          jdk_version = 3;
1
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diff changeset
   368
        }
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   369
      } else {
950
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diff changeset
   370
        jdk_version = 4;
1
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   371
      }
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   372
    } else {
950
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   373
      jdk_version = 5;
1
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   374
    }
950
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   375
    JDK_Version::fully_initialize(jdk_version);
1
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parents:
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   376
  }
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   377
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parents:
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   378
  #ifdef ASSERT
489c9b5090e2 Initial load
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parents:
diff changeset
   379
  if (FullGCALot) {
489c9b5090e2 Initial load
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parents:
diff changeset
   380
    // Allocate an array of dummy objects.
489c9b5090e2 Initial load
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parents:
diff changeset
   381
    // We'd like these to be at the bottom of the old generation,
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parents:
diff changeset
   382
    // so that when we free one and then collect,
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parents:
diff changeset
   383
    // (almost) the whole heap moves
489c9b5090e2 Initial load
duke
parents:
diff changeset
   384
    // and we find out if we actually update all the oops correctly.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   385
    // But we can't allocate directly in the old generation,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   386
    // so we allocate wherever, and hope that the first collection
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duke
parents:
diff changeset
   387
    // moves these objects to the bottom of the old generation.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   388
    // We can allocate directly in the permanent generation, so we do.
489c9b5090e2 Initial load
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parents:
diff changeset
   389
    int size;
489c9b5090e2 Initial load
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parents:
diff changeset
   390
    if (UseConcMarkSweepGC) {
489c9b5090e2 Initial load
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parents:
diff changeset
   391
      warning("Using +FullGCALot with concurrent mark sweep gc "
489c9b5090e2 Initial load
duke
parents:
diff changeset
   392
              "will not force all objects to relocate");
489c9b5090e2 Initial load
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parents:
diff changeset
   393
      size = FullGCALotDummies;
489c9b5090e2 Initial load
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parents:
diff changeset
   394
    } else {
489c9b5090e2 Initial load
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parents:
diff changeset
   395
      size = FullGCALotDummies * 2;
489c9b5090e2 Initial load
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parents:
diff changeset
   396
    }
13728
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diff changeset
   397
    objArrayOop    naked_array = oopFactory::new_objArray(SystemDictionary::Object_klass(), size, CHECK);
1
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parents:
diff changeset
   398
    objArrayHandle dummy_array(THREAD, naked_array);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   399
    int i = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   400
    while (i < size) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   401
        // Allocate dummy in old generation
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
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diff changeset
   402
      oop dummy = InstanceKlass::cast(SystemDictionary::Object_klass())->allocate_instance(CHECK);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   403
      dummy_array->obj_at_put(i++, dummy);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   404
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   405
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   406
      // Only modify the global variable inside the mutex.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   407
      // If we had a race to here, the other dummy_array instances
489c9b5090e2 Initial load
duke
parents:
diff changeset
   408
      // and their elements just get dropped on the floor, which is fine.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   409
      MutexLocker ml(FullGCALot_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   410
      if (_fullgc_alot_dummy_array == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   411
        _fullgc_alot_dummy_array = dummy_array();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   412
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   413
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   414
    assert(i == _fullgc_alot_dummy_array->length(), "just checking");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   415
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   416
  #endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   417
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   418
13728
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coleenp
parents: 13195
diff changeset
   419
// CDS support for patching vtables in metadata in the shared archive.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   420
// All types inherited from Metadata have vtables, but not types inherited
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   421
// from MetaspaceObj, because the latter does not have virtual functions.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   422
// If the metadata type has a vtable, it cannot be shared in the read-only
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   423
// section of the CDS archive, because the vtable pointer is patched.
8076
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coleenp
parents: 7704
diff changeset
   424
static inline void* dereference(void* addr) {
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   425
  return *(void**)addr;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   426
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   427
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   428
static inline void add_vtable(void** list, int* n, void* o, int count) {
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   429
  guarantee((*n) < count, "vtable list too small");
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   430
  void* vtable = dereference(o);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   431
  assert(dereference(vtable) != NULL, "invalid vtable");
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   432
  list[(*n)++] = vtable;
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   433
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
void Universe::init_self_patching_vtbl_list(void** list, int count) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   436
  int n = 0;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   437
  { InstanceKlass o;          add_vtable(list, &n, &o, count); }
13738
d67be49a5beb 7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
parents: 13728
diff changeset
   438
  { InstanceClassLoaderKlass o; add_vtable(list, &n, &o, count); }
d67be49a5beb 7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
parents: 13728
diff changeset
   439
  { InstanceMirrorKlass o;    add_vtable(list, &n, &o, count); }
d67be49a5beb 7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
parents: 13728
diff changeset
   440
  { InstanceRefKlass o;       add_vtable(list, &n, &o, count); }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
  { typeArrayKlass o;         add_vtable(list, &n, &o, count); }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
  { objArrayKlass o;          add_vtable(list, &n, &o, count); }
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   443
  { Method o;                 add_vtable(list, &n, &o, count); }
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   444
  { ConstantPool o;           add_vtable(list, &n, &o, count); }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   446
489c9b5090e2 Initial load
duke
parents:
diff changeset
   447
void Universe::initialize_basic_type_mirrors(TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
    assert(_int_mirror==NULL, "basic type mirrors already initialized");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
    _int_mirror     =
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
      java_lang_Class::create_basic_type_mirror("int",    T_INT, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
    _float_mirror   =
489c9b5090e2 Initial load
duke
parents:
diff changeset
   452
      java_lang_Class::create_basic_type_mirror("float",  T_FLOAT,   CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
    _double_mirror  =
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
      java_lang_Class::create_basic_type_mirror("double", T_DOUBLE,  CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   455
    _byte_mirror    =
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
      java_lang_Class::create_basic_type_mirror("byte",   T_BYTE, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
    _bool_mirror    =
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
      java_lang_Class::create_basic_type_mirror("boolean",T_BOOLEAN, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
    _char_mirror    =
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
      java_lang_Class::create_basic_type_mirror("char",   T_CHAR, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   461
    _long_mirror    =
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
      java_lang_Class::create_basic_type_mirror("long",   T_LONG, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
    _short_mirror   =
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
      java_lang_Class::create_basic_type_mirror("short",  T_SHORT,   CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
    _void_mirror    =
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
      java_lang_Class::create_basic_type_mirror("void",   T_VOID, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
    _mirrors[T_INT]     = _int_mirror;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
    _mirrors[T_FLOAT]   = _float_mirror;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   470
    _mirrors[T_DOUBLE]  = _double_mirror;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
    _mirrors[T_BYTE]    = _byte_mirror;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   472
    _mirrors[T_BOOLEAN] = _bool_mirror;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
    _mirrors[T_CHAR]    = _char_mirror;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   474
    _mirrors[T_LONG]    = _long_mirror;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
    _mirrors[T_SHORT]   = _short_mirror;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   476
    _mirrors[T_VOID]    = _void_mirror;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   477
  //_mirrors[T_OBJECT]  = InstanceKlass::cast(_object_klass)->java_mirror();
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   478
  //_mirrors[T_ARRAY]   = InstanceKlass::cast(_object_klass)->java_mirror();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   479
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   480
489c9b5090e2 Initial load
duke
parents:
diff changeset
   481
void Universe::fixup_mirrors(TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   482
  // Bootstrap problem: all classes gets a mirror (java.lang.Class instance) assigned eagerly,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   483
  // but we cannot do that for classes created before java.lang.Class is loaded. Here we simply
489c9b5090e2 Initial load
duke
parents:
diff changeset
   484
  // walk over permanent objects created so far (mostly classes) and fixup their mirrors. Note
489c9b5090e2 Initial load
duke
parents:
diff changeset
   485
  // that the number of objects allocated at this point is very small.
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4450
diff changeset
   486
  assert(SystemDictionary::Class_klass_loaded(), "java.lang.Class should be loaded");
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   487
  HandleMark hm(THREAD);
8725
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8724
diff changeset
   488
  // Cache the start of the static fields
13738
d67be49a5beb 7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
parents: 13728
diff changeset
   489
  InstanceMirrorKlass::init_offset_of_static_fields();
8725
8c1e3dd5fe1b 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 8724
diff changeset
   490
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   491
  GrowableArray <Klass*>* list = java_lang_Class::fixup_mirror_list();
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   492
  int list_length = list->length();
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   493
  for (int i = 0; i < list_length; i++) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   494
    Klass* k = list->at(i);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   495
    assert(k->is_klass(), "List should only hold classes");
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   496
    EXCEPTION_MARK;
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   497
    KlassHandle kh(THREAD, k);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   498
    java_lang_Class::fixup_mirror(kh, CATCH);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
}
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   500
  delete java_lang_Class::fixup_mirror_list();
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   501
  java_lang_Class::set_fixup_mirror_list(NULL);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   502
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
static bool has_run_finalizers_on_exit = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
void Universe::run_finalizers_on_exit() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
  if (has_run_finalizers_on_exit) return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
  has_run_finalizers_on_exit = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
  // Called on VM exit. This ought to be run in a separate thread.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
  if (TraceReferenceGC) tty->print_cr("Callback to run finalizers on exit");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
    PRESERVE_EXCEPTION_MARK;
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4450
diff changeset
   514
    KlassHandle finalizer_klass(THREAD, SystemDictionary::Finalizer_klass());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
    JavaValue result(T_VOID);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
    JavaCalls::call_static(
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
      &result,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
      finalizer_klass,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   519
      vmSymbols::run_finalizers_on_exit_name(),
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   520
      vmSymbols::void_method_signature(),
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
      THREAD
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
    );
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
    // Ignore any pending exceptions
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
    CLEAR_PENDING_EXCEPTION;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
// initialize_vtable could cause gc if
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
// 1) we specified true to initialize_vtable and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
// 2) this ran after gc was enabled
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
// In case those ever change we use handles for oops
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
void Universe::reinitialize_vtable_of(KlassHandle k_h, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
  // init vtable of k and all subclasses
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   535
  Klass* ko = k_h();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
  klassVtable* vt = ko->vtable();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
  if (vt) vt->initialize_vtable(false, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
  if (ko->oop_is_instance()) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   539
    InstanceKlass* ik = (InstanceKlass*)ko;
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   540
    for (KlassHandle s_h(THREAD, ik->subklass()); s_h() != NULL; s_h = (THREAD, s_h()->next_sibling())) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
      reinitialize_vtable_of(s_h, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   547
void initialize_itable_for_klass(Klass* k, TRAPS) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   548
  InstanceKlass::cast(k)->itable()->initialize_itable(false, CHECK);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
void Universe::reinitialize_itables(TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
  SystemDictionary::classes_do(initialize_itable_for_klass, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   554
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
bool Universe::on_page_boundary(void* addr) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
  return ((uintptr_t) addr) % os::vm_page_size() == 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
489c9b5090e2 Initial load
duke
parents:
diff changeset
   562
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
bool Universe::should_fill_in_stack_trace(Handle throwable) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
  // never attempt to fill in the stack trace of preallocated errors that do not have
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
  // backtrace. These errors are kept alive forever and may be "re-used" when all
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
  // preallocated errors with backtrace have been consumed. Also need to avoid
489c9b5090e2 Initial load
duke
parents:
diff changeset
   567
  // a potential loop which could happen if an out of memory occurs when attempting
489c9b5090e2 Initial load
duke
parents:
diff changeset
   568
  // to allocate the backtrace.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
  return ((throwable() != Universe::_out_of_memory_error_java_heap) &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
   570
          (throwable() != Universe::_out_of_memory_error_perm_gen)  &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
          (throwable() != Universe::_out_of_memory_error_array_size) &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
   572
          (throwable() != Universe::_out_of_memory_error_gc_overhead_limit));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
489c9b5090e2 Initial load
duke
parents:
diff changeset
   575
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
oop Universe::gen_out_of_memory_error(oop default_err) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   577
  // generate an out of memory error:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   578
  // - if there is a preallocated error with backtrace available then return it wth
489c9b5090e2 Initial load
duke
parents:
diff changeset
   579
  //   a filled in stack trace.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
  // - if there are no preallocated errors with backtrace available then return
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
  //   an error without backtrace.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
  int next;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
  if (_preallocated_out_of_memory_error_avail_count > 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
    next = (int)Atomic::add(-1, &_preallocated_out_of_memory_error_avail_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
    assert(next < (int)PreallocatedOutOfMemoryErrorCount, "avail count is corrupt");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   586
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
    next = -1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
  if (next < 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
    // all preallocated errors have been used.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
    // return default
489c9b5090e2 Initial load
duke
parents:
diff changeset
   592
    return default_err;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
    // get the error object at the slot and set set it to NULL so that the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   595
    // array isn't keeping it alive anymore.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
    oop exc = preallocated_out_of_memory_errors()->obj_at(next);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
    assert(exc != NULL, "slot has been used already");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   598
    preallocated_out_of_memory_errors()->obj_at_put(next, NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   599
489c9b5090e2 Initial load
duke
parents:
diff changeset
   600
    // use the message from the default error
489c9b5090e2 Initial load
duke
parents:
diff changeset
   601
    oop msg = java_lang_Throwable::message(default_err);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   602
    assert(msg != NULL, "no message");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   603
    java_lang_Throwable::set_message(exc, msg);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   604
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
    // populate the stack trace and return it.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   606
    java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(exc);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
    return exc;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   610
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
static intptr_t non_oop_bits = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
void* Universe::non_oop_word() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
  // Neither the high bits nor the low bits of this value is allowed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
  // to look like (respectively) the high or low bits of a real oop.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   616
  //
489c9b5090e2 Initial load
duke
parents:
diff changeset
   617
  // High and low are CPU-specific notions, but low always includes
489c9b5090e2 Initial load
duke
parents:
diff changeset
   618
  // the low-order bit.  Since oops are always aligned at least mod 4,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   619
  // setting the low-order bit will ensure that the low half of the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   620
  // word will never look like that of a real oop.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
  //
489c9b5090e2 Initial load
duke
parents:
diff changeset
   622
  // Using the OS-supplied non-memory-address word (usually 0 or -1)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
  // will take care of the high bits, however many there are.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
  if (non_oop_bits == 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   626
    non_oop_bits = (intptr_t)os::non_memory_address_word() | 1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   627
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
489c9b5090e2 Initial load
duke
parents:
diff changeset
   629
  return (void*)non_oop_bits;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   630
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   631
489c9b5090e2 Initial load
duke
parents:
diff changeset
   632
jint universe_init() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
  assert(!Universe::_fully_initialized, "called after initialize_vtables");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   634
  guarantee(1 << LogHeapWordSize == sizeof(HeapWord),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   635
         "LogHeapWordSize is incorrect.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
  guarantee(sizeof(oop) >= sizeof(HeapWord), "HeapWord larger than oop?");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   637
  guarantee(sizeof(oop) % sizeof(HeapWord) == 0,
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   638
            "oop size is not not a multiple of HeapWord size");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
  TraceTime timer("Genesis", TraceStartupTime);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   640
  GC_locker::lock();  // do not allow gc during bootstrapping
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
  JavaClasses::compute_hard_coded_offsets();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
  jint status = Universe::initialize_heap();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   644
  if (status != JNI_OK) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
    return status;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   646
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   647
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   648
  // Create memory for metadata.  Must be after initializing heap for
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   649
  // DumpSharedSpaces.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   650
  ClassLoaderData::init_null_class_loader_data();
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   651
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   652
  // We have a heap so create the Method* caches before
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   653
  // Metaspace::initialize_shared_spaces() tries to populate them.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   654
  Universe::_finalizer_register_cache = new LatestMethodOopCache();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   655
  Universe::_reflect_invoke_cache     = new ActiveMethodOopsCache();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   656
489c9b5090e2 Initial load
duke
parents:
diff changeset
   657
  if (UseSharedSpaces) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   658
    // Read the data structures supporting the shared spaces (shared
489c9b5090e2 Initial load
duke
parents:
diff changeset
   659
    // system dictionary, symbol table, etc.).  After that, access to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   660
    // the file (other than the mapped regions) is no longer needed, and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   661
    // the file is closed. Closing the file does not affect the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   662
    // currently mapped regions.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   663
    MetaspaceShared::initialize_shared_spaces();
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   664
    StringTable::create_table();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   665
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   666
    SymbolTable::create_table();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   667
    StringTable::create_table();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   668
    ClassLoader::create_package_info_table();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   669
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   670
489c9b5090e2 Initial load
duke
parents:
diff changeset
   671
  return JNI_OK;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   672
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   673
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   674
// Choose the heap base address and oop encoding mode
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   675
// when compressed oops are used:
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   676
// Unscaled  - Use 32-bits oops without encoding when
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   677
//     NarrowOopHeapBaseMin + heap_size < 4Gb
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   678
// ZeroBased - Use zero based compressed oops with encoding when
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   679
//     NarrowOopHeapBaseMin + heap_size < 32Gb
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   680
// HeapBased - Use compressed oops with heap base + encoding.
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   681
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   682
// 4Gb
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   683
static const uint64_t NarrowOopHeapMax = (uint64_t(max_juint) + 1);
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   684
// 32Gb
5694
1e0532a6abff 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents: 5420
diff changeset
   685
// OopEncodingHeapMax == NarrowOopHeapMax << LogMinObjAlignmentInBytes;
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   686
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   687
char* Universe::preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode) {
4427
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   688
  size_t base = 0;
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   689
#ifdef _LP64
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   690
  if (UseCompressedOops) {
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   691
    assert(mode == UnscaledNarrowOop  ||
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   692
           mode == ZeroBasedNarrowOop ||
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   693
           mode == HeapBasedNarrowOop, "mode is invalid");
4427
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   694
    const size_t total_size = heap_size + HeapBaseMinAddress;
3677
2fc0673d704d 6869822: assert(Universe::narrow_oop_shift() == 0,"use unscaled narrow oop")
kvn
parents: 3262
diff changeset
   695
    // Return specified base for the first request.
2fc0673d704d 6869822: assert(Universe::narrow_oop_shift() == 0,"use unscaled narrow oop")
kvn
parents: 3262
diff changeset
   696
    if (!FLAG_IS_DEFAULT(HeapBaseMinAddress) && (mode == UnscaledNarrowOop)) {
4427
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   697
      base = HeapBaseMinAddress;
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   698
    } else if (total_size <= OopEncodingHeapMax && (mode != HeapBasedNarrowOop)) {
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   699
      if (total_size <= NarrowOopHeapMax && (mode == UnscaledNarrowOop) &&
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   700
          (Universe::narrow_oop_shift() == 0)) {
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   701
        // Use 32-bits oops without encoding and
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   702
        // place heap's top on the 4Gb boundary
4427
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   703
        base = (NarrowOopHeapMax - heap_size);
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   704
      } else {
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   705
        // Can't reserve with NarrowOopShift == 0
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   706
        Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes);
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   707
        if (mode == UnscaledNarrowOop ||
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   708
            mode == ZeroBasedNarrowOop && total_size <= NarrowOopHeapMax) {
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   709
          // Use zero based compressed oops with encoding and
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   710
          // place heap's top on the 32Gb boundary in case
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   711
          // total_size > 4Gb or failed to reserve below 4Gb.
4427
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   712
          base = (OopEncodingHeapMax - heap_size);
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   713
        }
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   714
      }
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   715
    } else {
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   716
      // Can't reserve below 32Gb.
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   717
      Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes);
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   718
    }
4427
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   719
    // Set narrow_oop_base and narrow_oop_use_implicit_null_checks
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   720
    // used in ReservedHeapSpace() constructors.
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   721
    // The final values will be set in initialize_heap() below.
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   722
    if (base != 0 && (base + heap_size) <= OopEncodingHeapMax) {
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   723
      // Use zero based compressed oops
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   724
      Universe::set_narrow_oop_base(NULL);
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   725
      // Don't need guard page for implicit checks in indexed
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   726
      // addressing mode with zero based Compressed Oops.
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   727
      Universe::set_narrow_oop_use_implicit_null_checks(true);
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   728
    } else {
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   729
      // Set to a non-NULL value so the ReservedSpace ctor computes
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   730
      // the correct no-access prefix.
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   731
      // The final value will be set in initialize_heap() below.
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   732
      Universe::set_narrow_oop_base((address)NarrowOopHeapMax);
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   733
#ifdef _WIN64
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   734
      if (UseLargePages) {
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   735
        // Cannot allocate guard pages for implicit checks in indexed
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   736
        // addressing mode when large pages are specified on windows.
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   737
        Universe::set_narrow_oop_use_implicit_null_checks(false);
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   738
      }
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   739
#endif //  _WIN64
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   740
    }
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   741
  }
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   742
#endif
4427
f20b20f5f65b 6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
kvn
parents: 3677
diff changeset
   743
  return (char*)base; // also return NULL (don't care) for 32-bit VM
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   744
}
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   745
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   746
jint Universe::initialize_heap() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   747
489c9b5090e2 Initial load
duke
parents:
diff changeset
   748
  if (UseParallelGC) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   749
#ifndef SERIALGC
489c9b5090e2 Initial load
duke
parents:
diff changeset
   750
    Universe::_collectedHeap = new ParallelScavengeHeap();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   751
#else  // SERIALGC
489c9b5090e2 Initial load
duke
parents:
diff changeset
   752
    fatal("UseParallelGC not supported in java kernel vm.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   753
#endif // SERIALGC
489c9b5090e2 Initial load
duke
parents:
diff changeset
   754
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
   755
  } else if (UseG1GC) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
   756
#ifndef SERIALGC
10746
96f50959f650 7088680: G1: Cleanup in the G1CollectorPolicy class
tonyp
parents: 10565
diff changeset
   757
    G1CollectorPolicy* g1p = new G1CollectorPolicy();
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
   758
    G1CollectedHeap* g1h = new G1CollectedHeap(g1p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
   759
    Universe::_collectedHeap = g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
   760
#else  // SERIALGC
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
   761
    fatal("UseG1GC not supported in java kernel vm.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
   762
#endif // SERIALGC
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
   763
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   764
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   765
    GenCollectorPolicy *gc_policy;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   766
489c9b5090e2 Initial load
duke
parents:
diff changeset
   767
    if (UseSerialGC) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   768
      gc_policy = new MarkSweepPolicy();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   769
    } else if (UseConcMarkSweepGC) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   770
#ifndef SERIALGC
489c9b5090e2 Initial load
duke
parents:
diff changeset
   771
      if (UseAdaptiveSizePolicy) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   772
        gc_policy = new ASConcurrentMarkSweepPolicy();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   773
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   774
        gc_policy = new ConcurrentMarkSweepPolicy();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   775
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   776
#else   // SERIALGC
489c9b5090e2 Initial load
duke
parents:
diff changeset
   777
    fatal("UseConcMarkSweepGC not supported in java kernel vm.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   778
#endif // SERIALGC
489c9b5090e2 Initial load
duke
parents:
diff changeset
   779
    } else { // default old generation
489c9b5090e2 Initial load
duke
parents:
diff changeset
   780
      gc_policy = new MarkSweepPolicy();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   781
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   782
489c9b5090e2 Initial load
duke
parents:
diff changeset
   783
    Universe::_collectedHeap = new GenCollectedHeap(gc_policy);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   784
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   785
489c9b5090e2 Initial load
duke
parents:
diff changeset
   786
  jint status = Universe::heap()->initialize();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   787
  if (status != JNI_OK) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   788
    return status;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   789
  }
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   790
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   791
#ifdef _LP64
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   792
  if (UseCompressedOops) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   793
    // Subtract a page because something can get allocated at heap base.
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   794
    // This also makes implicit null checking work, because the
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   795
    // memory+1 page below heap_base needs to cause a signal.
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   796
    // See needs_explicit_null_check.
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   797
    // Only set the heap base for compressed oops because it indicates
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   798
    // compressed oops for pstack code.
7704
cc9d3ed42704 7006505: Use kstat info to identify SPARC processor
kvn
parents: 7397
diff changeset
   799
    bool verbose = PrintCompressedOopsMode || (PrintMiscellaneous && Verbose);
cc9d3ed42704 7006505: Use kstat info to identify SPARC processor
kvn
parents: 7397
diff changeset
   800
    if (verbose) {
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   801
      tty->cr();
7388
98cea0fd27fc 6999491: non-zero COOPs are used when they should not
kvn
parents: 5702
diff changeset
   802
      tty->print("heap address: " PTR_FORMAT ", size: " SIZE_FORMAT " MB",
98cea0fd27fc 6999491: non-zero COOPs are used when they should not
kvn
parents: 5702
diff changeset
   803
                 Universe::heap()->base(), Universe::heap()->reserved_region().byte_size()/M);
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   804
    }
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   805
    if ((uint64_t)Universe::heap()->reserved_region().end() > OopEncodingHeapMax) {
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   806
      // Can't reserve heap below 32Gb.
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   807
      Universe::set_narrow_oop_base(Universe::heap()->base() - os::vm_page_size());
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   808
      Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes);
7704
cc9d3ed42704 7006505: Use kstat info to identify SPARC processor
kvn
parents: 7397
diff changeset
   809
      if (verbose) {
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   810
        tty->print(", Compressed Oops with base: "PTR_FORMAT, Universe::narrow_oop_base());
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   811
      }
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   812
    } else {
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   813
      Universe::set_narrow_oop_base(0);
7704
cc9d3ed42704 7006505: Use kstat info to identify SPARC processor
kvn
parents: 7397
diff changeset
   814
      if (verbose) {
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   815
        tty->print(", zero based Compressed Oops");
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   816
      }
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   817
#ifdef _WIN64
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   818
      if (!Universe::narrow_oop_use_implicit_null_checks()) {
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   819
        // Don't need guard page for implicit checks in indexed addressing
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   820
        // mode with zero based Compressed Oops.
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   821
        Universe::set_narrow_oop_use_implicit_null_checks(true);
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   822
      }
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   823
#endif //  _WIN64
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   824
      if((uint64_t)Universe::heap()->reserved_region().end() > NarrowOopHeapMax) {
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   825
        // Can't reserve heap below 4Gb.
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   826
        Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes);
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   827
      } else {
3677
2fc0673d704d 6869822: assert(Universe::narrow_oop_shift() == 0,"use unscaled narrow oop")
kvn
parents: 3262
diff changeset
   828
        Universe::set_narrow_oop_shift(0);
7704
cc9d3ed42704 7006505: Use kstat info to identify SPARC processor
kvn
parents: 7397
diff changeset
   829
        if (verbose) {
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   830
          tty->print(", 32-bits Oops");
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   831
        }
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   832
      }
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   833
    }
7704
cc9d3ed42704 7006505: Use kstat info to identify SPARC processor
kvn
parents: 7397
diff changeset
   834
    if (verbose) {
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   835
      tty->cr();
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   836
      tty->cr();
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   837
    }
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   838
  }
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   839
  assert(Universe::narrow_oop_base() == (Universe::heap()->base() - os::vm_page_size()) ||
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   840
         Universe::narrow_oop_base() == NULL, "invalid value");
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   841
  assert(Universe::narrow_oop_shift() == LogMinObjAlignmentInBytes ||
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   842
         Universe::narrow_oop_shift() == 0, "invalid value");
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 1681
diff changeset
   843
#endif
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   844
489c9b5090e2 Initial load
duke
parents:
diff changeset
   845
  // We will never reach the CATCH below since Exceptions::_throw will cause
489c9b5090e2 Initial load
duke
parents:
diff changeset
   846
  // the VM to exit if an exception is thrown during initialization
489c9b5090e2 Initial load
duke
parents:
diff changeset
   847
489c9b5090e2 Initial load
duke
parents:
diff changeset
   848
  if (UseTLAB) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   849
    assert(Universe::heap()->supports_tlab_allocation(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   850
           "Should support thread-local allocation buffers");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   851
    ThreadLocalAllocBuffer::startup_initialization();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   852
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   853
  return JNI_OK;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   854
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   855
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   856
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   857
// Reserve the Java heap, which is now the same for all GCs.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   858
ReservedSpace Universe::reserve_heap(size_t heap_size, size_t alignment) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   859
  // Add in the class metaspace area so the classes in the headers can
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   860
  // be compressed the same as instances.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   861
  size_t total_reserved = heap_size + ClassMetaspaceSize;
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   862
  char* addr = Universe::preferred_heap_base(total_reserved, Universe::UnscaledNarrowOop);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   863
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   864
  ReservedHeapSpace total_rs(total_reserved, alignment, UseLargePages, addr);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   865
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   866
  if (UseCompressedOops) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   867
    if (addr != NULL && !total_rs.is_reserved()) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   868
      // Failed to reserve at specified address - the requested memory
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   869
      // region is taken already, for example, by 'java' launcher.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   870
      // Try again to reserver heap higher.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   871
      addr = Universe::preferred_heap_base(total_reserved, Universe::ZeroBasedNarrowOop);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   872
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   873
      ReservedHeapSpace total_rs0(total_reserved, alignment,
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   874
                                  UseLargePages, addr);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   875
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   876
      if (addr != NULL && !total_rs0.is_reserved()) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   877
        // Failed to reserve at specified address again - give up.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   878
        addr = Universe::preferred_heap_base(total_reserved, Universe::HeapBasedNarrowOop);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   879
        assert(addr == NULL, "");
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   880
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   881
        ReservedHeapSpace total_rs1(total_reserved, alignment,
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   882
                                    UseLargePages, addr);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   883
        total_rs = total_rs1;
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   884
      } else {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   885
        total_rs = total_rs0;
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   886
      }
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   887
    }
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   888
  }
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   889
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   890
  if (!total_rs.is_reserved()) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   891
    vm_exit_during_initialization(err_msg("Could not reserve enough space for object heap %d bytes", total_reserved));
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   892
    return total_rs;
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   893
  }
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   894
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   895
  // Split the reserved space into main Java heap and a space for classes
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   896
  // so that they can be compressed using the same algorithm as compressed oops
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   897
  ReservedSpace heap_rs = total_rs.first_part(heap_size);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   898
  ReservedSpace class_rs = total_rs.last_part(heap_size, alignment);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   899
  Metaspace::initialize_class_space(class_rs);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   900
  return heap_rs;
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   901
}
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   902
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   903
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   904
// It's the caller's repsonsibility to ensure glitch-freedom
489c9b5090e2 Initial load
duke
parents:
diff changeset
   905
// (if required).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   906
void Universe::update_heap_info_at_gc() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   907
  _heap_capacity_at_last_gc = heap()->capacity();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   908
  _heap_used_at_last_gc     = heap()->used();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   909
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   910
489c9b5090e2 Initial load
duke
parents:
diff changeset
   911
489c9b5090e2 Initial load
duke
parents:
diff changeset
   912
489c9b5090e2 Initial load
duke
parents:
diff changeset
   913
void universe2_init() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   914
  EXCEPTION_MARK;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   915
  Universe::genesis(CATCH);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   916
  // Although we'd like to verify here that the state of the heap
489c9b5090e2 Initial load
duke
parents:
diff changeset
   917
  // is good, we can't because the main thread has not yet added
489c9b5090e2 Initial load
duke
parents:
diff changeset
   918
  // itself to the threads list (so, using current interfaces
489c9b5090e2 Initial load
duke
parents:
diff changeset
   919
  // we can't "fill" its TLAB), unless TLABs are disabled.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   920
  if (VerifyBeforeGC && !UseTLAB &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
   921
      Universe::heap()->total_collections() >= VerifyGCStartAt) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   922
     Universe::heap()->prepare_for_verify();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   923
     Universe::verify();   // make sure we're starting with a clean slate
489c9b5090e2 Initial load
duke
parents:
diff changeset
   924
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   925
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   926
489c9b5090e2 Initial load
duke
parents:
diff changeset
   927
489c9b5090e2 Initial load
duke
parents:
diff changeset
   928
// This function is defined in JVM.cpp
489c9b5090e2 Initial load
duke
parents:
diff changeset
   929
extern void initialize_converter_functions();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   930
489c9b5090e2 Initial load
duke
parents:
diff changeset
   931
bool universe_post_init() {
7384
71eebb634028 7000578: CMS: assert(SafepointSynchronize::is_at_safepoint()) failed: Else races are possible
ysr
parents: 5702
diff changeset
   932
  assert(!is_init_completed(), "Error: initialization not yet completed!");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   933
  Universe::_fully_initialized = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   934
  EXCEPTION_MARK;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   935
  { ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   936
    Interpreter::initialize();      // needed for interpreter entry points
489c9b5090e2 Initial load
duke
parents:
diff changeset
   937
    if (!UseSharedSpaces) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   938
      HandleMark hm(THREAD);
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4450
diff changeset
   939
      KlassHandle ok_h(THREAD, SystemDictionary::Object_klass());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   940
      Universe::reinitialize_vtable_of(ok_h, CHECK_false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   941
      Universe::reinitialize_itables(CHECK_false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   942
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   943
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   944
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   945
  HandleMark hm(THREAD);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   946
  Klass* k;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   947
  instanceKlassHandle k_h;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   948
    // Setup preallocated empty java.lang.Class array
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4450
diff changeset
   949
    Universe::_the_empty_class_klass_array = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_false);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   950
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   951
    // Setup preallocated OutOfMemoryError errors
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   952
    k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_OutOfMemoryError(), true, CHECK_false);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   953
    k_h = instanceKlassHandle(THREAD, k);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   954
    Universe::_out_of_memory_error_java_heap = k_h->allocate_instance(CHECK_false);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   955
    Universe::_out_of_memory_error_perm_gen = k_h->allocate_instance(CHECK_false);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   956
    Universe::_out_of_memory_error_array_size = k_h->allocate_instance(CHECK_false);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   957
    Universe::_out_of_memory_error_gc_overhead_limit =
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   958
      k_h->allocate_instance(CHECK_false);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   959
489c9b5090e2 Initial load
duke
parents:
diff changeset
   960
    // Setup preallocated NullPointerException
489c9b5090e2 Initial load
duke
parents:
diff changeset
   961
    // (this is currently used for a cheap & dirty solution in compiler exception handling)
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   962
    k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_NullPointerException(), true, CHECK_false);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   963
    Universe::_null_ptr_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   964
    // Setup preallocated ArithmeticException
489c9b5090e2 Initial load
duke
parents:
diff changeset
   965
    // (this is currently used for a cheap & dirty solution in compiler exception handling)
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   966
    k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ArithmeticException(), true, CHECK_false);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   967
    Universe::_arithmetic_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   968
    // Virtual Machine Error for when we get into a situation we can't resolve
489c9b5090e2 Initial load
duke
parents:
diff changeset
   969
    k = SystemDictionary::resolve_or_fail(
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   970
      vmSymbols::java_lang_VirtualMachineError(), true, CHECK_false);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   971
    bool linked = InstanceKlass::cast(k)->link_class_or_fail(CHECK_false);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   972
    if (!linked) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   973
      tty->print_cr("Unable to link/verify VirtualMachineError class");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   974
      return false; // initialization failed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   975
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   976
    Universe::_virtual_machine_error_instance =
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   977
      InstanceKlass::cast(k)->allocate_instance(CHECK_false);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   978
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   979
    Universe::_vm_exception               = InstanceKlass::cast(k)->allocate_instance(CHECK_false);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
   980
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   981
  if (!DumpSharedSpaces) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   982
    // These are the only Java fields that are currently set during shared space dumping.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   983
    // We prefer to not handle this generally, so we always reinitialize these detail messages.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   984
    Handle msg = java_lang_String::create_from_str("Java heap space", CHECK_false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   985
    java_lang_Throwable::set_message(Universe::_out_of_memory_error_java_heap, msg());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   986
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   987
    msg = java_lang_String::create_from_str("Metadata space", CHECK_false);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   988
    java_lang_Throwable::set_message(Universe::_out_of_memory_error_perm_gen, msg());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   989
489c9b5090e2 Initial load
duke
parents:
diff changeset
   990
    msg = java_lang_String::create_from_str("Requested array size exceeds VM limit", CHECK_false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   991
    java_lang_Throwable::set_message(Universe::_out_of_memory_error_array_size, msg());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   992
489c9b5090e2 Initial load
duke
parents:
diff changeset
   993
    msg = java_lang_String::create_from_str("GC overhead limit exceeded", CHECK_false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   994
    java_lang_Throwable::set_message(Universe::_out_of_memory_error_gc_overhead_limit, msg());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   995
489c9b5090e2 Initial load
duke
parents:
diff changeset
   996
    msg = java_lang_String::create_from_str("/ by zero", CHECK_false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   997
    java_lang_Throwable::set_message(Universe::_arithmetic_exception_instance, msg());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   998
489c9b5090e2 Initial load
duke
parents:
diff changeset
   999
    // Setup the array of errors that have preallocated backtrace
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1000
    k = Universe::_out_of_memory_error_java_heap->klass();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1001
    assert(k->name() == vmSymbols::java_lang_OutOfMemoryError(), "should be out of memory error");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1002
    k_h = instanceKlassHandle(THREAD, k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1003
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1004
    int len = (StackTraceInThrowable) ? (int)PreallocatedOutOfMemoryErrorCount : 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1005
    Universe::_preallocated_out_of_memory_error_array = oopFactory::new_objArray(k_h(), len, CHECK_false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1006
    for (int i=0; i<len; i++) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1007
      oop err = k_h->allocate_instance(CHECK_false);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1008
      Handle err_h = Handle(THREAD, err);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1009
      java_lang_Throwable::allocate_backtrace(err_h, CHECK_false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1010
      Universe::preallocated_out_of_memory_errors()->obj_at_put(i, err_h());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1011
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1012
    Universe::_preallocated_out_of_memory_error_avail_count = (jint)len;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1013
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1014
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1015
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1016
  // Setup static method for registering finalizers
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1017
  // The finalizer klass must be linked before looking up the method, in
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1018
  // case it needs to get rewritten.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1019
  InstanceKlass::cast(SystemDictionary::Finalizer_klass())->link_class(CHECK_false);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1020
  Method* m = InstanceKlass::cast(SystemDictionary::Finalizer_klass())->find_method(
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1021
                                  vmSymbols::register_method_name(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1022
                                  vmSymbols::register_method_signature());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1023
  if (m == NULL || !m->is_static()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1024
    THROW_MSG_(vmSymbols::java_lang_NoSuchMethodException(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1025
      "java.lang.ref.Finalizer.register", false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1026
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1027
  Universe::_finalizer_register_cache->init(
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4450
diff changeset
  1028
    SystemDictionary::Finalizer_klass(), m, CHECK_false);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1029
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1030
  // Resolve on first use and initialize class.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1031
  // Note: No race-condition here, since a resolve will always return the same result
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1032
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1033
  // Setup method for security checks
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7704
diff changeset
  1034
  k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_reflect_Method(), true, CHECK_false);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1035
  k_h = instanceKlassHandle(THREAD, k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1036
  k_h->link_class(CHECK_false);
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4571
diff changeset
  1037
  m = k_h->find_method(vmSymbols::invoke_name(), vmSymbols::object_object_array_object_signature());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1038
  if (m == NULL || m->is_static()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1039
    THROW_MSG_(vmSymbols::java_lang_NoSuchMethodException(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1040
      "java.lang.reflect.Method.invoke", false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1041
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1042
  Universe::_reflect_invoke_cache->init(k_h(), m, CHECK_false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1043
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1044
  // The folowing is initializing converter functions for serialization in
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1045
  // JVM.cpp. If we clean up the StrictMath code above we may want to find
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1046
  // a better solution for this as well.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1047
  initialize_converter_functions();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1048
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1049
  // This needs to be done before the first scavenge/gc, since
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1050
  // it's an input to soft ref clearing policy.
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1051
  {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1052
    MutexLocker x(Heap_lock);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1053
    Universe::update_heap_info_at_gc();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 360
diff changeset
  1054
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1055
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1056
  // ("weak") refs processing infrastructure initialization
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1057
  Universe::heap()->post_initialize();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1058
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1059
  // Initialize performance counters for metaspaces
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1060
  MetaspaceCounters::initialize_performance_counters();
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1061
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1062
  GC_locker::unlock();  // allow gc after bootstrapping
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1063
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1064
  MemoryService::set_universe_heap(Universe::_collectedHeap);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1065
  return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1066
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1067
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1068
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1069
void Universe::compute_base_vtable_size() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1070
  _base_vtable_size = ClassLoader::compute_Object_vtable();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1071
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1072
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1073
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1074
// %%% The Universe::flush_foo methods belong in CodeCache.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1075
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1076
// Flushes compiled methods dependent on dependee.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1077
void Universe::flush_dependents_on(instanceKlassHandle dependee) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1078
  assert_lock_strong(Compile_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1079
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1080
  if (CodeCache::number_of_nmethods_with_dependencies() == 0) return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1081
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1082
  // CodeCache can only be updated by a thread_in_VM and they will all be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1083
  // stopped dring the safepoint so CodeCache will be safe to update without
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1084
  // holding the CodeCache_lock.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1085
10265
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1086
  KlassDepChange changes(dependee);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1087
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1088
  // Compute the dependent nmethods
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1089
  if (CodeCache::mark_for_deoptimization(changes) > 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1090
    // At least one nmethod has been marked for deoptimization
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1091
    VM_Deoptimize op;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1092
    VMThread::execute(&op);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1093
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1094
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1095
10265
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1096
// Flushes compiled methods dependent on a particular CallSite
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1097
// instance when its target is different than the given MethodHandle.
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1098
void Universe::flush_dependents_on(Handle call_site, Handle method_handle) {
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1099
  assert_lock_strong(Compile_lock);
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1100
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1101
  if (CodeCache::number_of_nmethods_with_dependencies() == 0) return;
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1102
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1103
  // CodeCache can only be updated by a thread_in_VM and they will all be
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1104
  // stopped dring the safepoint so CodeCache will be safe to update without
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1105
  // holding the CodeCache_lock.
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1106
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1107
  CallSiteDepChange changes(call_site(), method_handle());
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1108
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1109
  // Compute the dependent nmethods that have a reference to a
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1110
  // CallSite object.  We use InstanceKlass::mark_dependent_nmethod
10265
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1111
  // directly instead of CodeCache::mark_for_deoptimization because we
10503
04b74421bdea 7083184: JSR 292: don't store context class argument with call site dependencies
twisti
parents: 10265
diff changeset
  1112
  // want dependents on the call site class only not all classes in
04b74421bdea 7083184: JSR 292: don't store context class argument with call site dependencies
twisti
parents: 10265
diff changeset
  1113
  // the ContextStream.
10265
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1114
  int marked = 0;
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1115
  {
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1116
    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1117
    InstanceKlass* call_site_klass = InstanceKlass::cast(call_site->klass());
10265
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1118
    marked = call_site_klass->mark_dependent_nmethods(changes);
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1119
  }
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1120
  if (marked > 0) {
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1121
    // At least one nmethod has been marked for deoptimization
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1122
    VM_Deoptimize op;
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1123
    VMThread::execute(&op);
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1124
  }
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1125
}
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 9995
diff changeset
  1126
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1127
#ifdef HOTSWAP
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1128
// Flushes compiled methods dependent on dependee in the evolutionary sense
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1129
void Universe::flush_evol_dependents_on(instanceKlassHandle ev_k_h) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1130
  // --- Compile_lock is not held. However we are at a safepoint.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1131
  assert_locked_or_safepoint(Compile_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1132
  if (CodeCache::number_of_nmethods_with_dependencies() == 0) return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1133
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1134
  // CodeCache can only be updated by a thread_in_VM and they will all be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1135
  // stopped dring the safepoint so CodeCache will be safe to update without
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1136
  // holding the CodeCache_lock.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1137
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1138
  // Compute the dependent nmethods
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1139
  if (CodeCache::mark_for_evol_deoptimization(ev_k_h) > 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1140
    // At least one nmethod has been marked for deoptimization
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1141
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1142
    // All this already happens inside a VM_Operation, so we'll do all the work here.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1143
    // Stuff copied from VM_Deoptimize and modified slightly.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1144
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1145
    // We do not want any GCs to happen while we are in the middle of this VM operation
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1146
    ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1147
    DeoptimizationMarker dm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1148
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1149
    // Deoptimize all activations depending on marked nmethods
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1150
    Deoptimization::deoptimize_dependents();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1151
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1152
    // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1153
    CodeCache::make_marked_nmethods_not_entrant();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1154
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1155
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1156
#endif // HOTSWAP
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1157
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1158
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1159
// Flushes compiled methods dependent on dependee
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1160
void Universe::flush_dependents_on_method(methodHandle m_h) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1161
  // --- Compile_lock is not held. However we are at a safepoint.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1162
  assert_locked_or_safepoint(Compile_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1163
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1164
  // CodeCache can only be updated by a thread_in_VM and they will all be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1165
  // stopped dring the safepoint so CodeCache will be safe to update without
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1166
  // holding the CodeCache_lock.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1167
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1168
  // Compute the dependent nmethods
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1169
  if (CodeCache::mark_for_deoptimization(m_h()) > 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1170
    // At least one nmethod has been marked for deoptimization
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1171
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1172
    // All this already happens inside a VM_Operation, so we'll do all the work here.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1173
    // Stuff copied from VM_Deoptimize and modified slightly.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1174
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1175
    // We do not want any GCs to happen while we are in the middle of this VM operation
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1176
    ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1177
    DeoptimizationMarker dm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1178
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1179
    // Deoptimize all activations depending on marked nmethods
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1180
    Deoptimization::deoptimize_dependents();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1181
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1182
    // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1183
    CodeCache::make_marked_nmethods_not_entrant();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1184
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1185
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1186
10997
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1187
void Universe::print() {
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1188
  print_on(gclog_or_tty);
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1189
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1190
10997
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1191
void Universe::print_on(outputStream* st, bool extended) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1192
  st->print_cr("Heap");
10997
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1193
  if (!extended) {
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1194
    heap()->print_on(st);
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1195
  } else {
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1196
    heap()->print_extended_on(st);
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1197
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1198
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1199
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1200
void Universe::print_heap_at_SIGBREAK() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1201
  if (PrintHeapAtSIGBREAK) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1202
    MutexLocker hl(Heap_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1203
    print_on(tty);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1204
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1205
    tty->flush();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1206
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1207
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1208
11788
bef6166c683c 7145537: minor tweaks to LogEvents
never
parents: 10997
diff changeset
  1209
void Universe::print_heap_before_gc(outputStream* st, bool ignore_extended) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1210
  st->print_cr("{Heap before GC invocations=%u (full %u):",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1211
               heap()->total_collections(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1212
               heap()->total_full_collections());
11788
bef6166c683c 7145537: minor tweaks to LogEvents
never
parents: 10997
diff changeset
  1213
  if (!PrintHeapAtGCExtended || ignore_extended) {
10997
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1214
    heap()->print_on(st);
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1215
  } else {
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1216
    heap()->print_extended_on(st);
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1217
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1218
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1219
11788
bef6166c683c 7145537: minor tweaks to LogEvents
never
parents: 10997
diff changeset
  1220
void Universe::print_heap_after_gc(outputStream* st, bool ignore_extended) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1221
  st->print_cr("Heap after GC invocations=%u (full %u):",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1222
               heap()->total_collections(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1223
               heap()->total_full_collections());
11788
bef6166c683c 7145537: minor tweaks to LogEvents
never
parents: 10997
diff changeset
  1224
  if (!PrintHeapAtGCExtended || ignore_extended) {
10997
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1225
    heap()->print_on(st);
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1226
  } else {
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1227
    heap()->print_extended_on(st);
0be4b3be7197 7099849: G1: include heap region information in hs_err files
tonyp
parents: 10746
diff changeset
  1228
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1229
  st->print_cr("}");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1230
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1231
12379
2cf45b79ce3a 4988100: oop_verify_old_oop appears to be dead
brutisso
parents: 11788
diff changeset
  1232
void Universe::verify(bool silent, VerifyOption option) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1233
  if (SharedSkipVerify) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1234
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1235
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1236
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1237
  // The use of _verify_in_progress is a temporary work around for
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1238
  // 6320749.  Don't bother with a creating a class to set and clear
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1239
  // it since it is only used in this method and the control flow is
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1240
  // straight forward.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1241
  _verify_in_progress = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1242
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1243
  COMPILER2_PRESENT(
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1244
    assert(!DerivedPointerTable::is_active(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1245
         "DPT should not be active during verification "
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1246
         "(of thread stacks below)");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1247
  )
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1248
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1249
  ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1250
  HandleMark hm;  // Handles created during verification can be zapped
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1251
  _verify_count++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1252
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1253
  if (!silent) gclog_or_tty->print("[Verifying ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1254
  if (!silent) gclog_or_tty->print("threads ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1255
  Threads::verify();
12379
2cf45b79ce3a 4988100: oop_verify_old_oop appears to be dead
brutisso
parents: 11788
diff changeset
  1256
  heap()->verify(silent, option);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1257
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1258
  if (!silent) gclog_or_tty->print("syms ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1259
  SymbolTable::verify();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1260
  if (!silent) gclog_or_tty->print("strs ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1261
  StringTable::verify();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1262
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1263
    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1264
    if (!silent) gclog_or_tty->print("zone ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1265
    CodeCache::verify();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1266
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1267
  if (!silent) gclog_or_tty->print("dict ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1268
  SystemDictionary::verify();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1269
#ifndef PRODUCT
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1270
  if (!silent) gclog_or_tty->print("cldg ");
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1271
  ClassLoaderDataGraph::verify();
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1272
#endif
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1273
  if (!silent) gclog_or_tty->print("hand ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1274
  JNIHandles::verify();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1275
  if (!silent) gclog_or_tty->print("C-heap ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1276
  os::check_heap();
8724
693c6b883b54 7028374: race in fix_oop_relocations for scavengeable nmethods
never
parents: 8076
diff changeset
  1277
  if (!silent) gclog_or_tty->print("code cache ");
693c6b883b54 7028374: race in fix_oop_relocations for scavengeable nmethods
never
parents: 8076
diff changeset
  1278
  CodeCache::verify_oops();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1279
  if (!silent) gclog_or_tty->print_cr("]");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1280
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1281
  _verify_in_progress = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1282
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1283
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1284
// Oop verification (see MacroAssembler::verify_oop)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1285
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1286
static uintptr_t _verify_oop_data[2]   = {0, (uintptr_t)-1};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1287
static uintptr_t _verify_klass_data[2] = {0, (uintptr_t)-1};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1288
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1289
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1290
static void calculate_verify_data(uintptr_t verify_data[2],
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1291
                                  HeapWord* low_boundary,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1292
                                  HeapWord* high_boundary) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1293
  assert(low_boundary < high_boundary, "bad interval");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1294
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1295
  // decide which low-order bits we require to be clear:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1296
  size_t alignSize = MinObjAlignmentInBytes;
5694
1e0532a6abff 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents: 5420
diff changeset
  1297
  size_t min_object_size = CollectedHeap::min_fill_size();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1298
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1299
  // make an inclusive limit:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1300
  uintptr_t max = (uintptr_t)high_boundary - min_object_size*wordSize;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1301
  uintptr_t min = (uintptr_t)low_boundary;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1302
  assert(min < max, "bad interval");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1303
  uintptr_t diff = max ^ min;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1304
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1305
  // throw away enough low-order bits to make the diff vanish
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1306
  uintptr_t mask = (uintptr_t)(-1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1307
  while ((mask & diff) != 0)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1308
    mask <<= 1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1309
  uintptr_t bits = (min & mask);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1310
  assert(bits == (max & mask), "correct mask");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1311
  // check an intermediate value between min and max, just to make sure:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1312
  assert(bits == ((min + (max-min)/2) & mask), "correct mask");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1313
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1314
  // require address alignment, too:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1315
  mask |= (alignSize - 1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1316
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1317
  if (!(verify_data[0] == 0 && verify_data[1] == (uintptr_t)-1)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1318
    assert(verify_data[0] == mask && verify_data[1] == bits, "mask stability");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1319
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1320
  verify_data[0] = mask;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1321
  verify_data[1] = bits;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1322
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1323
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1324
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1325
// Oop verification (see MacroAssembler::verify_oop)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1326
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1327
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1328
uintptr_t Universe::verify_oop_mask() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1329
  MemRegion m = heap()->reserved_region();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1330
  calculate_verify_data(_verify_oop_data,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1331
                        m.start(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1332
                        m.end());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1333
  return _verify_oop_data[0];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1334
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1335
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1336
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1337
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1338
uintptr_t Universe::verify_oop_bits() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1339
  verify_oop_mask();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1340
  return _verify_oop_data[1];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1341
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1342
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1343
uintptr_t Universe::verify_mark_mask() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1344
  return markOopDesc::lock_mask_in_place;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1345
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1346
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1347
uintptr_t Universe::verify_mark_bits() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1348
  intptr_t mask = verify_mark_mask();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1349
  intptr_t bits = (intptr_t)markOopDesc::prototype();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1350
  assert((bits & ~mask) == 0, "no stray header bits");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1351
  return bits;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1352
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1353
#endif // PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1354
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1355
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1356
void Universe::compute_verify_oop_data() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1357
  verify_oop_mask();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1358
  verify_oop_bits();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1359
  verify_mark_mask();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1360
  verify_mark_bits();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1361
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1362
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1363
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1364
void CommonMethodOopCache::init(Klass* k, Method* m, TRAPS) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1365
  if (!UseSharedSpaces) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1366
    _klass = k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1367
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1368
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1369
  else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1370
    // sharing initilization should have already set up _klass
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1371
    assert(_klass != NULL, "just checking");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1372
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1373
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1374
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1375
  _method_idnum = m->method_idnum();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1376
  assert(_method_idnum >= 0, "sanity check");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1377
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1378
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1379
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1380
ActiveMethodOopsCache::~ActiveMethodOopsCache() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1381
  if (_prev_methods != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1382
    delete _prev_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1383
    _prev_methods = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1384
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1385
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1386
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1387
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1388
void ActiveMethodOopsCache::add_previous_version(Method* const method) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1389
  assert(Thread::current()->is_VM_thread(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1390
    "only VMThread can add previous versions");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1391
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1392
  // Only append the previous method if it is executing on the stack.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1393
  if (method->on_stack()) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1394
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1395
  if (_prev_methods == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1396
    // This is the first previous version so make some space.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1397
    // Start with 2 elements under the assumption that the class
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1398
    // won't be redefined much.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1399
      _prev_methods = new (ResourceObj::C_HEAP, mtClass) GrowableArray<Method*>(2, true);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1400
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1401
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1402
  // RC_TRACE macro has an embedded ResourceMark
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1403
  RC_TRACE(0x00000100,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1404
    ("add: %s(%s): adding prev version ref for cached method @%d",
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1405
    method->name()->as_C_string(), method->signature()->as_C_string(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1406
    _prev_methods->length()));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1407
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1408
    _prev_methods->append(method);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1409
  }
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1410
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1411
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1412
  // Since the caller is the VMThread and we are at a safepoint, this is a good
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1413
  // time to clear out unused method references.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1414
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1415
  if (_prev_methods == NULL) return;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1416
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1417
  for (int i = _prev_methods->length() - 1; i >= 0; i--) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1418
    Method* method = _prev_methods->at(i);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1419
    assert(method != NULL, "weak method ref was unexpectedly cleared");
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1420
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1421
    if (!method->on_stack()) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1422
      // This method isn't running anymore so remove it
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1423
      _prev_methods->remove_at(i);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1424
      MetadataFactory::free_metadata(method->method_holder()->class_loader_data(), method);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1425
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1426
      // RC_TRACE macro has an embedded ResourceMark
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1427
      RC_TRACE(0x00000400, ("add: %s(%s): previous cached method @%d is alive",
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1428
        method->name()->as_C_string(), method->signature()->as_C_string(), i));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1429
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1430
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1431
} // end add_previous_version()
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1432
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1433
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1434
bool ActiveMethodOopsCache::is_same_method(Method* const method) const {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1435
  InstanceKlass* ik = InstanceKlass::cast(klass());
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1436
  Method* check_method = ik->method_with_idnum(method_idnum());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1437
  assert(check_method != NULL, "sanity check");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1438
  if (check_method == method) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1439
    // done with the easy case
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1440
    return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1441
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1442
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1443
  if (_prev_methods != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1444
    // The cached method has been redefined at least once so search
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1445
    // the previous versions for a match.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1446
    for (int i = 0; i < _prev_methods->length(); i++) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1447
      check_method = _prev_methods->at(i);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1448
      if (check_method == method) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1449
        // a previous version matches
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1450
        return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1451
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1452
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1453
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1454
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1455
  // either no previous versions or no previous version matched
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1456
  return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1457
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1458
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1459
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1460
Method* LatestMethodOopCache::get_Method() {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1461
  InstanceKlass* ik = InstanceKlass::cast(klass());
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
  1462
  Method* m = ik->method_with_idnum(method_idnum());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1463
  assert(m != NULL, "sanity check");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1464
  return m;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1465
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1466
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1467
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1468
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1469
// Release dummy object(s) at bottom of heap
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1470
bool Universe::release_fullgc_alot_dummy() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1471
  MutexLocker ml(FullGCALot_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1472
  if (_fullgc_alot_dummy_array != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1473
    if (_fullgc_alot_dummy_next >= _fullgc_alot_dummy_array->length()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1474
      // No more dummies to release, release entire array instead
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1475
      _fullgc_alot_dummy_array = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1476
      return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1477
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1478
    if (!UseConcMarkSweepGC) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1479
      // Release dummy at bottom of old generation
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1480
      _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1481
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1482
    // Release dummy at bottom of permanent generation
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1483
    _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1484
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1485
  return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1486
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1487
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1488
#endif // ASSERT