Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/shared/vmGCOperations.cpp @ 269:850fdf70db2b
Merge
| author | jmasa |
|---|---|
| date | Mon, 28 Jul 2008 15:30:23 -0700 |
| parents | d1605aabd0a1 |
| children | 1ee8caae33af |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 2005-2008 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 # include "incls/_precompiled.incl" | |
| 25 # include "incls/_vmGCOperations.cpp.incl" | |
| 26 | |
| 27 HS_DTRACE_PROBE_DECL1(hotspot, gc__begin, bool); | |
| 28 HS_DTRACE_PROBE_DECL(hotspot, gc__end); | |
| 29 | |
| 30 // The same dtrace probe can't be inserted in two different files, so we | |
| 31 // have to call it here, so it's only in one file. Can't create new probes | |
| 32 // for the other file anymore. The dtrace probes have to remain stable. | |
| 33 void VM_GC_Operation::notify_gc_begin(bool full) { | |
| 34 HS_DTRACE_PROBE1(hotspot, gc__begin, full); | |
| 35 } | |
| 36 | |
| 37 void VM_GC_Operation::notify_gc_end() { | |
| 38 HS_DTRACE_PROBE(hotspot, gc__end); | |
| 39 } | |
| 40 | |
| 41 void VM_GC_Operation::acquire_pending_list_lock() { | |
| 42 // we may enter this with pending exception set | |
| 43 instanceRefKlass::acquire_pending_list_lock(&_pending_list_basic_lock); | |
| 44 } | |
| 45 | |
| 46 | |
| 47 void VM_GC_Operation::release_and_notify_pending_list_lock() { | |
| 48 | |
| 49 instanceRefKlass::release_and_notify_pending_list_lock(&_pending_list_basic_lock); | |
| 50 } | |
| 51 | |
| 52 // Allocations may fail in several threads at about the same time, | |
| 53 // resulting in multiple gc requests. We only want to do one of them. | |
| 54 // In case a GC locker is active and the need for a GC is already signalled, | |
| 55 // we want to skip this GC attempt altogether, without doing a futile | |
| 56 // safepoint operation. | |
| 57 bool VM_GC_Operation::skip_operation() const { | |
| 58 bool skip = (_gc_count_before != Universe::heap()->total_collections()); | |
| 59 if (_full && skip) { | |
| 60 skip = (_full_gc_count_before != Universe::heap()->total_full_collections()); | |
| 61 } | |
| 62 if (!skip && GC_locker::is_active_and_needs_gc()) { | |
| 63 skip = Universe::heap()->is_maximal_no_gc(); | |
| 64 assert(!(skip && (_gc_cause == GCCause::_gc_locker)), | |
| 65 "GC_locker cannot be active when initiating GC"); | |
| 66 } | |
| 67 return skip; | |
| 68 } | |
| 69 | |
| 70 bool VM_GC_Operation::doit_prologue() { | |
| 71 assert(Thread::current()->is_Java_thread(), "just checking"); | |
| 72 | |
| 73 acquire_pending_list_lock(); | |
| 74 // If the GC count has changed someone beat us to the collection | |
| 75 // Get the Heap_lock after the pending_list_lock. | |
| 76 Heap_lock->lock(); | |
| 77 // Check invocations | |
| 78 if (skip_operation()) { | |
| 79 // skip collection | |
| 80 Heap_lock->unlock(); | |
| 81 release_and_notify_pending_list_lock(); | |
| 82 _prologue_succeeded = false; | |
| 83 } else { | |
| 84 _prologue_succeeded = true; | |
| 85 } | |
| 86 return _prologue_succeeded; | |
| 87 } | |
| 88 | |
| 89 | |
| 90 void VM_GC_Operation::doit_epilogue() { | |
| 91 assert(Thread::current()->is_Java_thread(), "just checking"); | |
| 92 // Release the Heap_lock first. | |
| 93 Heap_lock->unlock(); | |
| 94 release_and_notify_pending_list_lock(); | |
| 95 } | |
| 96 | |
| 97 bool VM_GC_HeapInspection::doit_prologue() { | |
| 98 if (Universe::heap()->supports_heap_inspection()) { | |
| 99 return VM_GC_Operation::doit_prologue(); | |
| 100 } else { | |
| 101 return false; | |
| 102 } | |
| 103 } | |
| 104 | |
| 105 bool VM_GC_HeapInspection::skip_operation() const { | |
| 106 assert(Universe::heap()->supports_heap_inspection(), "huh?"); | |
| 107 return false; | |
| 108 } | |
| 109 | |
| 110 void VM_GC_HeapInspection::doit() { | |
| 111 HandleMark hm; | |
| 112 CollectedHeap* ch = Universe::heap(); | |
| 113 if (_full_gc) { | |
| 114 ch->collect_as_vm_thread(GCCause::_heap_inspection); | |
| 115 } else { | |
| 116 // make the heap parsable (no need to retire TLABs) | |
| 117 ch->ensure_parsability(false); | |
| 118 } | |
| 119 HeapInspection::heap_inspection(_out); | |
| 120 } | |
| 121 | |
| 122 | |
| 123 void VM_GenCollectForAllocation::doit() { | |
| 124 JvmtiGCForAllocationMarker jgcm; | |
| 125 notify_gc_begin(false); | |
| 126 | |
| 127 GenCollectedHeap* gch = GenCollectedHeap::heap(); | |
| 128 GCCauseSetter gccs(gch, _gc_cause); | |
| 129 _res = gch->satisfy_failed_allocation(_size, _tlab); | |
| 130 assert(gch->is_in_reserved_or_null(_res), "result not in heap"); | |
| 131 | |
| 132 if (_res == NULL && GC_locker::is_active_and_needs_gc()) { | |
| 133 set_gc_locked(); | |
| 134 } | |
| 135 notify_gc_end(); | |
| 136 } | |
| 137 | |
| 138 void VM_GenCollectFull::doit() { | |
| 139 JvmtiGCFullMarker jgcm; | |
| 140 notify_gc_begin(true); | |
| 141 | |
| 142 GenCollectedHeap* gch = GenCollectedHeap::heap(); | |
| 143 GCCauseSetter gccs(gch, _gc_cause); | |
| 144 gch->do_full_collection(gch->must_clear_all_soft_refs(), _max_level); | |
| 145 notify_gc_end(); | |
| 146 } | |
|
139
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
147 |
|
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
148 void VM_GenCollectForPermanentAllocation::doit() { |
|
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
149 JvmtiGCForAllocationMarker jgcm; |
|
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
150 notify_gc_begin(true); |
|
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
151 GenCollectedHeap* gch = GenCollectedHeap::heap(); |
|
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
152 GCCauseSetter gccs(gch, _gc_cause); |
|
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
153 gch->do_full_collection(gch->must_clear_all_soft_refs(), |
|
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
154 gch->n_gens() - 1); |
|
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
155 _res = gch->perm_gen()->allocate(_size, false); |
|
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
156 assert(gch->is_in_reserved_or_null(_res), "result not in heap"); |
|
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
157 if (_res == NULL && GC_locker::is_active_and_needs_gc()) { |
|
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
158 set_gc_locked(); |
|
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
159 } |
|
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
160 notify_gc_end(); |
|
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
161 } |