truffle: src/share/vm/memory/sharedHeap.cpp annotate

annotate src/share/vm/memory/sharedHeap.cpp @ 1685:0e35fa8ebccd

6973963: SEGV in ciBlock::start_bci() with EA Summary: Added more checks into ResourceObj and growableArray to verify correctness of allocation type. Reviewed-by: never, coleenp, dholmes

author	kvn
date	Tue, 03 Aug 2010 15:55:03 -0700
parents	c18cbe5936b8
children	8b10f48633dc

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 989 diff changeset	2 * Copyright (c) 2000, 2009, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 989 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 989 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 989 diff changeset	21 * questions.
0 a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
a61af66fc99e Initial load duke parents: diff changeset	25 # include "incls/_precompiled.incl"
a61af66fc99e Initial load duke parents: diff changeset	26 # include "incls/_sharedHeap.cpp.incl"
a61af66fc99e Initial load duke parents: diff changeset	27
a61af66fc99e Initial load duke parents: diff changeset	28 SharedHeap* SharedHeap::_sh;
a61af66fc99e Initial load duke parents: diff changeset	29
a61af66fc99e Initial load duke parents: diff changeset	30 // The set of potentially parallel tasks in strong root scanning.
a61af66fc99e Initial load duke parents: diff changeset	31 enum SH_process_strong_roots_tasks {
a61af66fc99e Initial load duke parents: diff changeset	32 SH_PS_Universe_oops_do,
a61af66fc99e Initial load duke parents: diff changeset	33 SH_PS_JNIHandles_oops_do,
a61af66fc99e Initial load duke parents: diff changeset	34 SH_PS_ObjectSynchronizer_oops_do,
a61af66fc99e Initial load duke parents: diff changeset	35 SH_PS_FlatProfiler_oops_do,
a61af66fc99e Initial load duke parents: diff changeset	36 SH_PS_Management_oops_do,
a61af66fc99e Initial load duke parents: diff changeset	37 SH_PS_SystemDictionary_oops_do,
a61af66fc99e Initial load duke parents: diff changeset	38 SH_PS_jvmti_oops_do,
a61af66fc99e Initial load duke parents: diff changeset	39 SH_PS_vmSymbols_oops_do,
a61af66fc99e Initial load duke parents: diff changeset	40 SH_PS_SymbolTable_oops_do,
a61af66fc99e Initial load duke parents: diff changeset	41 SH_PS_StringTable_oops_do,
a61af66fc99e Initial load duke parents: diff changeset	42 SH_PS_CodeCache_oops_do,
a61af66fc99e Initial load duke parents: diff changeset	43 // Leave this one last.
a61af66fc99e Initial load duke parents: diff changeset	44 SH_PS_NumElements
a61af66fc99e Initial load duke parents: diff changeset	45 };
a61af66fc99e Initial load duke parents: diff changeset	46
a61af66fc99e Initial load duke parents: diff changeset	47 SharedHeap::SharedHeap(CollectorPolicy* policy_) :
a61af66fc99e Initial load duke parents: diff changeset	48 CollectedHeap(),
a61af66fc99e Initial load duke parents: diff changeset	49 _collector_policy(policy_),
a61af66fc99e Initial load duke parents: diff changeset	50 _perm_gen(NULL), _rem_set(NULL),
a61af66fc99e Initial load duke parents: diff changeset	51 _strong_roots_parity(0),
a61af66fc99e Initial load duke parents: diff changeset	52 _process_strong_tasks(new SubTasksDone(SH_PS_NumElements)),
a61af66fc99e Initial load duke parents: diff changeset	53 _workers(NULL), _n_par_threads(0)
a61af66fc99e Initial load duke parents: diff changeset	54 {
a61af66fc99e Initial load duke parents: diff changeset	55 if (_process_strong_tasks == NULL \|\| !_process_strong_tasks->valid()) {
a61af66fc99e Initial load duke parents: diff changeset	56 vm_exit_during_initialization("Failed necessary allocation.");
a61af66fc99e Initial load duke parents: diff changeset	57 }
a61af66fc99e Initial load duke parents: diff changeset	58 _sh = this; // ch is static, should be set only once.
a61af66fc99e Initial load duke parents: diff changeset	59 if ((UseParNewGC \|\|
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	60 (UseConcMarkSweepGC && CMSParallelRemarkEnabled) \|\|
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	61 UseG1GC) &&
0 a61af66fc99e Initial load duke parents: diff changeset	62 ParallelGCThreads > 0) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	63 _workers = new WorkGang("Parallel GC Threads", ParallelGCThreads,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	64 /* are_GC_task_threads */true,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	65 /* are_ConcurrentGC_threads */false);
0 a61af66fc99e Initial load duke parents: diff changeset	66 if (_workers == NULL) {
a61af66fc99e Initial load duke parents: diff changeset	67 vm_exit_during_initialization("Failed necessary allocation.");
a61af66fc99e Initial load duke parents: diff changeset	68 }
a61af66fc99e Initial load duke parents: diff changeset	69 }
a61af66fc99e Initial load duke parents: diff changeset	70 }
a61af66fc99e Initial load duke parents: diff changeset	71
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	72 bool SharedHeap::heap_lock_held_for_gc() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	73 Thread* t = Thread::current();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	74 return Heap_lock->owned_by_self()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	75 \|\| ( (t->is_GC_task_thread() \|\| t->is_VM_thread())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	76 && _thread_holds_heap_lock_for_gc);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	77 }
0 a61af66fc99e Initial load duke parents: diff changeset	78
a61af66fc99e Initial load duke parents: diff changeset	79 void SharedHeap::set_par_threads(int t) {
a61af66fc99e Initial load duke parents: diff changeset	80 _n_par_threads = t;
a61af66fc99e Initial load duke parents: diff changeset	81 _process_strong_tasks->set_par_threads(t);
a61af66fc99e Initial load duke parents: diff changeset	82 }
a61af66fc99e Initial load duke parents: diff changeset	83
a61af66fc99e Initial load duke parents: diff changeset	84 class AssertIsPermClosure: public OopClosure {
a61af66fc99e Initial load duke parents: diff changeset	85 public:
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	86 virtual void do_oop(oop* p) {
0 a61af66fc99e Initial load duke parents: diff changeset	87 assert((p) == NULL \|\| (p)->is_perm(), "Referent should be perm.");
a61af66fc99e Initial load duke parents: diff changeset	88 }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	89 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); }
0 a61af66fc99e Initial load duke parents: diff changeset	90 };
a61af66fc99e Initial load duke parents: diff changeset	91 static AssertIsPermClosure assert_is_perm_closure;
a61af66fc99e Initial load duke parents: diff changeset	92
a61af66fc99e Initial load duke parents: diff changeset	93 void SharedHeap::change_strong_roots_parity() {
a61af66fc99e Initial load duke parents: diff changeset	94 // Also set the new collection parity.
a61af66fc99e Initial load duke parents: diff changeset	95 assert(_strong_roots_parity >= 0 && _strong_roots_parity <= 2,
a61af66fc99e Initial load duke parents: diff changeset	96 "Not in range.");
a61af66fc99e Initial load duke parents: diff changeset	97 _strong_roots_parity++;
a61af66fc99e Initial load duke parents: diff changeset	98 if (_strong_roots_parity == 3) _strong_roots_parity = 1;
a61af66fc99e Initial load duke parents: diff changeset	99 assert(_strong_roots_parity >= 1 && _strong_roots_parity <= 2,
a61af66fc99e Initial load duke parents: diff changeset	100 "Not in range.");
a61af66fc99e Initial load duke parents: diff changeset	101 }
a61af66fc99e Initial load duke parents: diff changeset	102
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	103 SharedHeap::StrongRootsScope::StrongRootsScope(SharedHeap* outer, bool activate)
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	104 : MarkScope(activate)
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	105 {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	106 if (_active) {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	107 outer->change_strong_roots_parity();
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	108 }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	109 }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	110
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	111 SharedHeap::StrongRootsScope::~StrongRootsScope() {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	112 // nothing particular
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	113 }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	114
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	115 void SharedHeap::process_strong_roots(bool activate_scope,
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	116 bool collecting_perm_gen,
0 a61af66fc99e Initial load duke parents: diff changeset	117 ScanningOption so,
a61af66fc99e Initial load duke parents: diff changeset	118 OopClosure* roots,
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	119 CodeBlobClosure* code_roots,
0 a61af66fc99e Initial load duke parents: diff changeset	120 OopsInGenClosure* perm_blk) {
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	121 StrongRootsScope srs(this, activate_scope);
0 a61af66fc99e Initial load duke parents: diff changeset	122 // General strong roots.
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	123 assert(_strong_roots_parity != 0, "must have called prologue code");
0 a61af66fc99e Initial load duke parents: diff changeset	124 if (!_process_strong_tasks->is_task_claimed(SH_PS_Universe_oops_do)) {
a61af66fc99e Initial load duke parents: diff changeset	125 Universe::oops_do(roots);
a61af66fc99e Initial load duke parents: diff changeset	126 ReferenceProcessor::oops_do(roots);
a61af66fc99e Initial load duke parents: diff changeset	127 // Consider perm-gen discovered lists to be strong.
a61af66fc99e Initial load duke parents: diff changeset	128 perm_gen()->ref_processor()->weak_oops_do(roots);
a61af66fc99e Initial load duke parents: diff changeset	129 }
a61af66fc99e Initial load duke parents: diff changeset	130 // Global (strong) JNI handles
a61af66fc99e Initial load duke parents: diff changeset	131 if (!_process_strong_tasks->is_task_claimed(SH_PS_JNIHandles_oops_do))
a61af66fc99e Initial load duke parents: diff changeset	132 JNIHandles::oops_do(roots);
a61af66fc99e Initial load duke parents: diff changeset	133 // All threads execute this; the individual threads are task groups.
a61af66fc99e Initial load duke parents: diff changeset	134 if (ParallelGCThreads > 0) {
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	135 Threads::possibly_parallel_oops_do(roots, code_roots);
0 a61af66fc99e Initial load duke parents: diff changeset	136 } else {
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	137 Threads::oops_do(roots, code_roots);
0 a61af66fc99e Initial load duke parents: diff changeset	138 }
a61af66fc99e Initial load duke parents: diff changeset	139 if (!_process_strong_tasks-> is_task_claimed(SH_PS_ObjectSynchronizer_oops_do))
a61af66fc99e Initial load duke parents: diff changeset	140 ObjectSynchronizer::oops_do(roots);
a61af66fc99e Initial load duke parents: diff changeset	141 if (!_process_strong_tasks->is_task_claimed(SH_PS_FlatProfiler_oops_do))
a61af66fc99e Initial load duke parents: diff changeset	142 FlatProfiler::oops_do(roots);
a61af66fc99e Initial load duke parents: diff changeset	143 if (!_process_strong_tasks->is_task_claimed(SH_PS_Management_oops_do))
a61af66fc99e Initial load duke parents: diff changeset	144 Management::oops_do(roots);
a61af66fc99e Initial load duke parents: diff changeset	145 if (!_process_strong_tasks->is_task_claimed(SH_PS_jvmti_oops_do))
a61af66fc99e Initial load duke parents: diff changeset	146 JvmtiExport::oops_do(roots);
a61af66fc99e Initial load duke parents: diff changeset	147
a61af66fc99e Initial load duke parents: diff changeset	148 if (!_process_strong_tasks->is_task_claimed(SH_PS_SystemDictionary_oops_do)) {
a61af66fc99e Initial load duke parents: diff changeset	149 if (so & SO_AllClasses) {
a61af66fc99e Initial load duke parents: diff changeset	150 SystemDictionary::oops_do(roots);
a61af66fc99e Initial load duke parents: diff changeset	151 } else
a61af66fc99e Initial load duke parents: diff changeset	152 if (so & SO_SystemClasses) {
a61af66fc99e Initial load duke parents: diff changeset	153 SystemDictionary::always_strong_oops_do(roots);
a61af66fc99e Initial load duke parents: diff changeset	154 }
a61af66fc99e Initial load duke parents: diff changeset	155 }
a61af66fc99e Initial load duke parents: diff changeset	156
a61af66fc99e Initial load duke parents: diff changeset	157 if (!_process_strong_tasks->is_task_claimed(SH_PS_SymbolTable_oops_do)) {
a61af66fc99e Initial load duke parents: diff changeset	158 if (so & SO_Symbols) {
a61af66fc99e Initial load duke parents: diff changeset	159 SymbolTable::oops_do(roots);
a61af66fc99e Initial load duke parents: diff changeset	160 }
a61af66fc99e Initial load duke parents: diff changeset	161 // Verify if the symbol table contents are in the perm gen
a61af66fc99e Initial load duke parents: diff changeset	162 NOT_PRODUCT(SymbolTable::oops_do(&assert_is_perm_closure));
a61af66fc99e Initial load duke parents: diff changeset	163 }
a61af66fc99e Initial load duke parents: diff changeset	164
a61af66fc99e Initial load duke parents: diff changeset	165 if (!_process_strong_tasks->is_task_claimed(SH_PS_StringTable_oops_do)) {
a61af66fc99e Initial load duke parents: diff changeset	166 if (so & SO_Strings) {
a61af66fc99e Initial load duke parents: diff changeset	167 StringTable::oops_do(roots);
a61af66fc99e Initial load duke parents: diff changeset	168 }
a61af66fc99e Initial load duke parents: diff changeset	169 // Verify if the string table contents are in the perm gen
a61af66fc99e Initial load duke parents: diff changeset	170 NOT_PRODUCT(StringTable::oops_do(&assert_is_perm_closure));
a61af66fc99e Initial load duke parents: diff changeset	171 }
a61af66fc99e Initial load duke parents: diff changeset	172
a61af66fc99e Initial load duke parents: diff changeset	173 if (!_process_strong_tasks->is_task_claimed(SH_PS_CodeCache_oops_do)) {
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	174 if (so & SO_CodeCache) {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	175 // (Currently, CMSCollector uses this to do intermediate-strength collections.)
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	176 assert(collecting_perm_gen, "scanning all of code cache");
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	177 assert(code_roots != NULL, "must supply closure for code cache");
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	178 if (code_roots != NULL) {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	179 CodeCache::blobs_do(code_roots);
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	180 }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	181 } else if (so & (SO_SystemClasses\|SO_AllClasses)) {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	182 if (!collecting_perm_gen) {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	183 // If we are collecting from class statics, but we are not going to
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	184 // visit all of the CodeCache, collect from the non-perm roots if any.
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	185 // This makes the code cache function temporarily as a source of strong
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	186 // roots for oops, until the next major collection.
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	187 //
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	188 // If collecting_perm_gen is true, we require that this phase will call
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	189 // CodeCache::do_unloading. This will kill off nmethods with expired
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	190 // weak references, such as stale invokedynamic targets.
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	191 CodeCache::scavenge_root_nmethods_do(code_roots);
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	192 }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	193 }
0 a61af66fc99e Initial load duke parents: diff changeset	194 // Verify if the code cache contents are in the perm gen
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	195 NOT_PRODUCT(CodeBlobToOopClosure assert_code_is_perm(&assert_is_perm_closure, /do_marking=/ false));
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	196 NOT_PRODUCT(CodeCache::asserted_non_scavengable_nmethods_do(&assert_code_is_perm));
0 a61af66fc99e Initial load duke parents: diff changeset	197 }
a61af66fc99e Initial load duke parents: diff changeset	198
a61af66fc99e Initial load duke parents: diff changeset	199 // Roots that should point only into permanent generation.
a61af66fc99e Initial load duke parents: diff changeset	200 {
a61af66fc99e Initial load duke parents: diff changeset	201 OopClosure* blk = NULL;
a61af66fc99e Initial load duke parents: diff changeset	202 if (collecting_perm_gen) {
a61af66fc99e Initial load duke parents: diff changeset	203 blk = roots;
a61af66fc99e Initial load duke parents: diff changeset	204 } else {
a61af66fc99e Initial load duke parents: diff changeset	205 debug_only(blk = &assert_is_perm_closure);
a61af66fc99e Initial load duke parents: diff changeset	206 }
a61af66fc99e Initial load duke parents: diff changeset	207 if (blk != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	208 if (!_process_strong_tasks->is_task_claimed(SH_PS_vmSymbols_oops_do))
a61af66fc99e Initial load duke parents: diff changeset	209 vmSymbols::oops_do(blk);
a61af66fc99e Initial load duke parents: diff changeset	210 }
a61af66fc99e Initial load duke parents: diff changeset	211 }
a61af66fc99e Initial load duke parents: diff changeset	212
a61af66fc99e Initial load duke parents: diff changeset	213 if (!collecting_perm_gen) {
a61af66fc99e Initial load duke parents: diff changeset	214 // All threads perform this; coordination is handled internally.
a61af66fc99e Initial load duke parents: diff changeset	215
a61af66fc99e Initial load duke parents: diff changeset	216 rem_set()->younger_refs_iterate(perm_gen(), perm_blk);
a61af66fc99e Initial load duke parents: diff changeset	217 }
a61af66fc99e Initial load duke parents: diff changeset	218 _process_strong_tasks->all_tasks_completed();
a61af66fc99e Initial load duke parents: diff changeset	219 }
a61af66fc99e Initial load duke parents: diff changeset	220
a61af66fc99e Initial load duke parents: diff changeset	221 class AlwaysTrueClosure: public BoolObjectClosure {
a61af66fc99e Initial load duke parents: diff changeset	222 public:
a61af66fc99e Initial load duke parents: diff changeset	223 void do_object(oop p) { ShouldNotReachHere(); }
a61af66fc99e Initial load duke parents: diff changeset	224 bool do_object_b(oop p) { return true; }
a61af66fc99e Initial load duke parents: diff changeset	225 };
a61af66fc99e Initial load duke parents: diff changeset	226 static AlwaysTrueClosure always_true;
a61af66fc99e Initial load duke parents: diff changeset	227
a61af66fc99e Initial load duke parents: diff changeset	228 class SkipAdjustingSharedStrings: public OopClosure {
a61af66fc99e Initial load duke parents: diff changeset	229 OopClosure* _clo;
a61af66fc99e Initial load duke parents: diff changeset	230 public:
a61af66fc99e Initial load duke parents: diff changeset	231 SkipAdjustingSharedStrings(OopClosure* clo) : _clo(clo) {}
a61af66fc99e Initial load duke parents: diff changeset	232
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	233 virtual void do_oop(oop* p) {
0 a61af66fc99e Initial load duke parents: diff changeset	234 oop o = (*p);
a61af66fc99e Initial load duke parents: diff changeset	235 if (!o->is_shared_readwrite()) {
a61af66fc99e Initial load duke parents: diff changeset	236 _clo->do_oop(p);
a61af66fc99e Initial load duke parents: diff changeset	237 }
a61af66fc99e Initial load duke parents: diff changeset	238 }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	239 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); }
0 a61af66fc99e Initial load duke parents: diff changeset	240 };
a61af66fc99e Initial load duke parents: diff changeset	241
a61af66fc99e Initial load duke parents: diff changeset	242 // Unmarked shared Strings in the StringTable (which got there due to
a61af66fc99e Initial load duke parents: diff changeset	243 // being in the constant pools of as-yet unloaded shared classes) were
a61af66fc99e Initial load duke parents: diff changeset	244 // not marked and therefore did not have their mark words preserved.
a61af66fc99e Initial load duke parents: diff changeset	245 // These entries are also deliberately not purged from the string
a61af66fc99e Initial load duke parents: diff changeset	246 // table during unloading of unmarked strings. If an identity hash
a61af66fc99e Initial load duke parents: diff changeset	247 // code was computed for any of these objects, it will not have been
a61af66fc99e Initial load duke parents: diff changeset	248 // cleared to zero during the forwarding process or by the
a61af66fc99e Initial load duke parents: diff changeset	249 // RecursiveAdjustSharedObjectClosure, and will be confused by the
a61af66fc99e Initial load duke parents: diff changeset	250 // adjusting process as a forwarding pointer. We need to skip
a61af66fc99e Initial load duke parents: diff changeset	251 // forwarding StringTable entries which contain unmarked shared
a61af66fc99e Initial load duke parents: diff changeset	252 // Strings. Actually, since shared strings won't be moving, we can
a61af66fc99e Initial load duke parents: diff changeset	253 // just skip adjusting any shared entries in the string table.
a61af66fc99e Initial load duke parents: diff changeset	254
a61af66fc99e Initial load duke parents: diff changeset	255 void SharedHeap::process_weak_roots(OopClosure* root_closure,
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	256 CodeBlobClosure* code_roots,
0 a61af66fc99e Initial load duke parents: diff changeset	257 OopClosure* non_root_closure) {
a61af66fc99e Initial load duke parents: diff changeset	258 // Global (weak) JNI handles
a61af66fc99e Initial load duke parents: diff changeset	259 JNIHandles::weak_oops_do(&always_true, root_closure);
a61af66fc99e Initial load duke parents: diff changeset	260
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 579 diff changeset	261 CodeCache::blobs_do(code_roots);
0 a61af66fc99e Initial load duke parents: diff changeset	262 SymbolTable::oops_do(root_closure);
a61af66fc99e Initial load duke parents: diff changeset	263 if (UseSharedSpaces && !DumpSharedSpaces) {
a61af66fc99e Initial load duke parents: diff changeset	264 SkipAdjustingSharedStrings skip_closure(root_closure);
a61af66fc99e Initial load duke parents: diff changeset	265 StringTable::oops_do(&skip_closure);
a61af66fc99e Initial load duke parents: diff changeset	266 } else {
a61af66fc99e Initial load duke parents: diff changeset	267 StringTable::oops_do(root_closure);
a61af66fc99e Initial load duke parents: diff changeset	268 }
a61af66fc99e Initial load duke parents: diff changeset	269 }
a61af66fc99e Initial load duke parents: diff changeset	270
a61af66fc99e Initial load duke parents: diff changeset	271 void SharedHeap::set_barrier_set(BarrierSet* bs) {
a61af66fc99e Initial load duke parents: diff changeset	272 _barrier_set = bs;
a61af66fc99e Initial load duke parents: diff changeset	273 // Cached barrier set for fast access in oops
a61af66fc99e Initial load duke parents: diff changeset	274 oopDesc::set_bs(bs);
a61af66fc99e Initial load duke parents: diff changeset	275 }
a61af66fc99e Initial load duke parents: diff changeset	276
a61af66fc99e Initial load duke parents: diff changeset	277 void SharedHeap::post_initialize() {
a61af66fc99e Initial load duke parents: diff changeset	278 ref_processing_init();
a61af66fc99e Initial load duke parents: diff changeset	279 }
a61af66fc99e Initial load duke parents: diff changeset	280
a61af66fc99e Initial load duke parents: diff changeset	281 void SharedHeap::ref_processing_init() {
a61af66fc99e Initial load duke parents: diff changeset	282 perm_gen()->ref_processor_init();
a61af66fc99e Initial load duke parents: diff changeset	283 }
a61af66fc99e Initial load duke parents: diff changeset	284
a61af66fc99e Initial load duke parents: diff changeset	285 // Some utilities.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	286 void SharedHeap::print_size_transition(outputStream* out,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	287 size_t bytes_before,
0 a61af66fc99e Initial load duke parents: diff changeset	288 size_t bytes_after,
a61af66fc99e Initial load duke parents: diff changeset	289 size_t capacity) {
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	290 out->print(" %d%s->%d%s(%d%s)",
0 a61af66fc99e Initial load duke parents: diff changeset	291 byte_size_in_proper_unit(bytes_before),
a61af66fc99e Initial load duke parents: diff changeset	292 proper_unit_for_byte_size(bytes_before),
a61af66fc99e Initial load duke parents: diff changeset	293 byte_size_in_proper_unit(bytes_after),
a61af66fc99e Initial load duke parents: diff changeset	294 proper_unit_for_byte_size(bytes_after),
a61af66fc99e Initial load duke parents: diff changeset	295 byte_size_in_proper_unit(capacity),
a61af66fc99e Initial load duke parents: diff changeset	296 proper_unit_for_byte_size(capacity));
a61af66fc99e Initial load duke parents: diff changeset	297 }

Mercurial > hg > truffle

annotate src/share/vm/memory/sharedHeap.cpp @ 1685:0e35fa8ebccd