Wed, 02 Nov 2011 08:04:23 +0100
7106751: G1: gc/gctests/nativeGC03 crashes VM with SIGSEGV
Summary: _cset_rs_update_cl[] was indexed with values beyond what it is set up to handle.
Reviewed-by: ysr, jmasa, johnc
1 /*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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
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23 */
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP
28 #include "gc_implementation/g1/concurrentMark.hpp"
29 #include "gc_implementation/g1/g1CollectedHeap.hpp"
30 #include "gc_implementation/g1/g1AllocRegion.inline.hpp"
31 #include "gc_implementation/g1/g1CollectorPolicy.hpp"
32 #include "gc_implementation/g1/heapRegionSeq.inline.hpp"
33 #include "utilities/taskqueue.hpp"
35 // Inline functions for G1CollectedHeap
37 template <class T>
38 inline HeapRegion*
39 G1CollectedHeap::heap_region_containing(const T addr) const {
40 HeapRegion* hr = _hrs.addr_to_region((HeapWord*) addr);
41 // hr can be null if addr in perm_gen
42 if (hr != NULL && hr->continuesHumongous()) {
43 hr = hr->humongous_start_region();
44 }
45 return hr;
46 }
48 template <class T>
49 inline HeapRegion*
50 G1CollectedHeap::heap_region_containing_raw(const T addr) const {
51 assert(_g1_reserved.contains((const void*) addr), "invariant");
52 HeapRegion* res = _hrs.addr_to_region_unsafe((HeapWord*) addr);
53 return res;
54 }
56 inline bool G1CollectedHeap::obj_in_cs(oop obj) {
57 HeapRegion* r = _hrs.addr_to_region((HeapWord*) obj);
58 return r != NULL && r->in_collection_set();
59 }
61 inline HeapWord*
62 G1CollectedHeap::attempt_allocation(size_t word_size,
63 unsigned int* gc_count_before_ret) {
64 assert_heap_not_locked_and_not_at_safepoint();
65 assert(!isHumongous(word_size), "attempt_allocation() should not "
66 "be called for humongous allocation requests");
68 HeapWord* result = _mutator_alloc_region.attempt_allocation(word_size,
69 false /* bot_updates */);
70 if (result == NULL) {
71 result = attempt_allocation_slow(word_size, gc_count_before_ret);
72 }
73 assert_heap_not_locked();
74 if (result != NULL) {
75 dirty_young_block(result, word_size);
76 }
77 return result;
78 }
80 inline HeapWord* G1CollectedHeap::survivor_attempt_allocation(size_t
81 word_size) {
82 assert(!isHumongous(word_size),
83 "we should not be seeing humongous-size allocations in this path");
85 HeapWord* result = _survivor_gc_alloc_region.attempt_allocation(word_size,
86 false /* bot_updates */);
87 if (result == NULL) {
88 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag);
89 result = _survivor_gc_alloc_region.attempt_allocation_locked(word_size,
90 false /* bot_updates */);
91 }
92 if (result != NULL) {
93 dirty_young_block(result, word_size);
94 }
95 return result;
96 }
98 inline HeapWord* G1CollectedHeap::old_attempt_allocation(size_t word_size) {
99 assert(!isHumongous(word_size),
100 "we should not be seeing humongous-size allocations in this path");
102 HeapWord* result = _old_gc_alloc_region.attempt_allocation(word_size,
103 true /* bot_updates */);
104 if (result == NULL) {
105 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag);
106 result = _old_gc_alloc_region.attempt_allocation_locked(word_size,
107 true /* bot_updates */);
108 }
109 return result;
110 }
112 // It dirties the cards that cover the block so that so that the post
113 // write barrier never queues anything when updating objects on this
114 // block. It is assumed (and in fact we assert) that the block
115 // belongs to a young region.
116 inline void
117 G1CollectedHeap::dirty_young_block(HeapWord* start, size_t word_size) {
118 assert_heap_not_locked();
120 // Assign the containing region to containing_hr so that we don't
121 // have to keep calling heap_region_containing_raw() in the
122 // asserts below.
123 DEBUG_ONLY(HeapRegion* containing_hr = heap_region_containing_raw(start);)
124 assert(containing_hr != NULL && start != NULL && word_size > 0,
125 "pre-condition");
126 assert(containing_hr->is_in(start), "it should contain start");
127 assert(containing_hr->is_young(), "it should be young");
128 assert(!containing_hr->isHumongous(), "it should not be humongous");
130 HeapWord* end = start + word_size;
131 assert(containing_hr->is_in(end - 1), "it should also contain end - 1");
133 MemRegion mr(start, end);
134 ((CardTableModRefBS*)_g1h->barrier_set())->dirty(mr);
135 }
137 inline RefToScanQueue* G1CollectedHeap::task_queue(int i) const {
138 return _task_queues->queue(i);
139 }
141 inline bool G1CollectedHeap::isMarkedPrev(oop obj) const {
142 return _cm->prevMarkBitMap()->isMarked((HeapWord *)obj);
143 }
145 inline bool G1CollectedHeap::isMarkedNext(oop obj) const {
146 return _cm->nextMarkBitMap()->isMarked((HeapWord *)obj);
147 }
149 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP