48 }
49
50 size_t G1CollectedHeap::desired_plab_sz(InCSetState dest) {
51 size_t gclab_word_size = alloc_buffer_stats(dest)->desired_plab_sz(G1CollectedHeap::heap()->workers()->active_workers());
52 // Prevent humongous PLAB sizes for two reasons:
53 // * PLABs are allocated using a similar paths as oops, but should
54 // never be in a humongous region
55 // * Allowing humongous PLABs needlessly churns the region free lists
56 return MIN2(_humongous_object_threshold_in_words, gclab_word_size);
57 }
58
59 // Inline functions for G1CollectedHeap
60
61 inline AllocationContextStats& G1CollectedHeap::allocation_context_stats() {
62 return _allocation_context_stats;
63 }
64
65 // Return the region with the given index. It assumes the index is valid.
66 inline HeapRegion* G1CollectedHeap::region_at(uint index) const { return _hrm.at(index); }
67
68 inline uint G1CollectedHeap::addr_to_region(HeapWord* addr) const {
69 assert(is_in_reserved(addr),
70 "Cannot calculate region index for address " PTR_FORMAT " that is outside of the heap [" PTR_FORMAT ", " PTR_FORMAT ")",
71 p2i(addr), p2i(reserved_region().start()), p2i(reserved_region().end()));
72 return (uint)(pointer_delta(addr, reserved_region().start(), sizeof(uint8_t)) >> HeapRegion::LogOfHRGrainBytes);
73 }
74
75 inline HeapWord* G1CollectedHeap::bottom_addr_for_region(uint index) const {
76 return _hrm.reserved().start() + index * HeapRegion::GrainWords;
77 }
78
79 template <class T>
80 inline HeapRegion* G1CollectedHeap::heap_region_containing_raw(const T addr) const {
81 assert(addr != NULL, "invariant");
82 assert(is_in_g1_reserved((const void*) addr),
83 "Address " PTR_FORMAT " is outside of the heap ranging from [" PTR_FORMAT " to " PTR_FORMAT ")",
84 p2i((void*)addr), p2i(g1_reserved().start()), p2i(g1_reserved().end()));
85 return _hrm.addr_to_region((HeapWord*) addr);
86 }
87
88 template <class T>
89 inline HeapRegion* G1CollectedHeap::heap_region_containing(const T addr) const {
90 HeapRegion* hr = heap_region_containing_raw(addr);
91 if (hr->is_continues_humongous()) {
92 return hr->humongous_start_region();
93 }
94 return hr;
95 }
96
97 inline void G1CollectedHeap::reset_gc_time_stamp() {
98 _gc_time_stamp = 0;
99 OrderAccess::fence();
100 // Clear the cached CSet starting regions and time stamps.
101 // Their validity is dependent on the GC timestamp.
102 clear_cset_start_regions();
103 }
104
105 inline void G1CollectedHeap::increment_gc_time_stamp() {
106 ++_gc_time_stamp;
107 OrderAccess::fence();
108 }
109
110 inline void G1CollectedHeap::old_set_add(HeapRegion* hr) {
111 _old_set.add(hr);
112 }
113
114 inline void G1CollectedHeap::old_set_remove(HeapRegion* hr) {
115 _old_set.remove(hr);
116 }
117
118 // It dirties the cards that cover the block so that so that the post
119 // write barrier never queues anything when updating objects on this
120 // block. It is assumed (and in fact we assert) that the block
121 // belongs to a young region.
122 inline void
123 G1CollectedHeap::dirty_young_block(HeapWord* start, size_t word_size) {
124 assert_heap_not_locked();
125
126 // Assign the containing region to containing_hr so that we don't
127 // have to keep calling heap_region_containing_raw() in the
128 // asserts below.
129 DEBUG_ONLY(HeapRegion* containing_hr = heap_region_containing_raw(start);)
130 assert(word_size > 0, "pre-condition");
131 assert(containing_hr->is_in(start), "it should contain start");
132 assert(containing_hr->is_young(), "it should be young");
133 assert(!containing_hr->is_humongous(), "it should not be humongous");
134
135 HeapWord* end = start + word_size;
136 assert(containing_hr->is_in(end - 1), "it should also contain end - 1");
137
138 MemRegion mr(start, end);
139 g1_barrier_set()->g1_mark_as_young(mr);
140 }
141
142 inline RefToScanQueue* G1CollectedHeap::task_queue(uint i) const {
143 return _task_queues->queue(i);
144 }
145
146 inline bool G1CollectedHeap::isMarkedPrev(oop obj) const {
147 return _cm->prevMarkBitMap()->isMarked((HeapWord *)obj);
148 }
149
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48 }
49
50 size_t G1CollectedHeap::desired_plab_sz(InCSetState dest) {
51 size_t gclab_word_size = alloc_buffer_stats(dest)->desired_plab_sz(G1CollectedHeap::heap()->workers()->active_workers());
52 // Prevent humongous PLAB sizes for two reasons:
53 // * PLABs are allocated using a similar paths as oops, but should
54 // never be in a humongous region
55 // * Allowing humongous PLABs needlessly churns the region free lists
56 return MIN2(_humongous_object_threshold_in_words, gclab_word_size);
57 }
58
59 // Inline functions for G1CollectedHeap
60
61 inline AllocationContextStats& G1CollectedHeap::allocation_context_stats() {
62 return _allocation_context_stats;
63 }
64
65 // Return the region with the given index. It assumes the index is valid.
66 inline HeapRegion* G1CollectedHeap::region_at(uint index) const { return _hrm.at(index); }
67
68 inline HeapRegion* G1CollectedHeap::next_region_by_index(HeapRegion* hr) const {
69 return _hrm.next_region_by_index(hr);
70 }
71
72 inline uint G1CollectedHeap::addr_to_region(HeapWord* addr) const {
73 assert(is_in_reserved(addr),
74 "Cannot calculate region index for address " PTR_FORMAT " that is outside of the heap [" PTR_FORMAT ", " PTR_FORMAT ")",
75 p2i(addr), p2i(reserved_region().start()), p2i(reserved_region().end()));
76 return (uint)(pointer_delta(addr, reserved_region().start(), sizeof(uint8_t)) >> HeapRegion::LogOfHRGrainBytes);
77 }
78
79 inline HeapWord* G1CollectedHeap::bottom_addr_for_region(uint index) const {
80 return _hrm.reserved().start() + index * HeapRegion::GrainWords;
81 }
82
83 template <class T>
84 inline HeapRegion* G1CollectedHeap::heap_region_containing(const T addr) const {
85 assert(addr != NULL, "invariant");
86 assert(is_in_g1_reserved((const void*) addr),
87 "Address " PTR_FORMAT " is outside of the heap ranging from [" PTR_FORMAT " to " PTR_FORMAT ")",
88 p2i((void*)addr), p2i(g1_reserved().start()), p2i(g1_reserved().end()));
89 return _hrm.addr_to_region((HeapWord*) addr);
90 }
91
92 inline void G1CollectedHeap::reset_gc_time_stamp() {
93 _gc_time_stamp = 0;
94 OrderAccess::fence();
95 // Clear the cached CSet starting regions and time stamps.
96 // Their validity is dependent on the GC timestamp.
97 clear_cset_start_regions();
98 }
99
100 inline void G1CollectedHeap::increment_gc_time_stamp() {
101 ++_gc_time_stamp;
102 OrderAccess::fence();
103 }
104
105 inline void G1CollectedHeap::old_set_add(HeapRegion* hr) {
106 _old_set.add(hr);
107 }
108
109 inline void G1CollectedHeap::old_set_remove(HeapRegion* hr) {
110 _old_set.remove(hr);
111 }
112
113 // It dirties the cards that cover the block so that so that the post
114 // write barrier never queues anything when updating objects on this
115 // block. It is assumed (and in fact we assert) that the block
116 // belongs to a young region.
117 inline void
118 G1CollectedHeap::dirty_young_block(HeapWord* start, size_t word_size) {
119 assert_heap_not_locked();
120
121 // Assign the containing region to containing_hr so that we don't
122 // have to keep calling heap_region_containing() in the
123 // asserts below.
124 DEBUG_ONLY(HeapRegion* containing_hr = heap_region_containing(start);)
125 assert(word_size > 0, "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->is_humongous(), "it should not be humongous");
129
130 HeapWord* end = start + word_size;
131 assert(containing_hr->is_in(end - 1), "it should also contain end - 1");
132
133 MemRegion mr(start, end);
134 g1_barrier_set()->g1_mark_as_young(mr);
135 }
136
137 inline RefToScanQueue* G1CollectedHeap::task_queue(uint i) const {
138 return _task_queues->queue(i);
139 }
140
141 inline bool G1CollectedHeap::isMarkedPrev(oop obj) const {
142 return _cm->prevMarkBitMap()->isMarked((HeapWord *)obj);
143 }
144
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