43 default:
44 ShouldNotReachHere();
45 return NULL; // Keep some compilers happy
46 }
47 }
48
49 size_t G1CollectedHeap::desired_plab_sz(InCSetState dest) {
50 size_t gclab_word_size = alloc_buffer_stats(dest)->desired_plab_sz(workers()->active_workers());
51 // Prevent humongous PLAB sizes for two reasons:
52 // * PLABs are allocated using a similar paths as oops, but should
53 // never be in a humongous region
54 // * Allowing humongous PLABs needlessly churns the region free lists
55 return MIN2(_humongous_object_threshold_in_words, gclab_word_size);
56 }
57
58 // Inline functions for G1CollectedHeap
59
60 // Return the region with the given index. It assumes the index is valid.
61 inline HeapRegion* G1CollectedHeap::region_at(uint index) const { return _hrm.at(index); }
62
63 inline HeapRegion* G1CollectedHeap::next_region_in_humongous(HeapRegion* hr) const {
64 return _hrm.next_region_in_humongous(hr);
65 }
66
67 inline uint G1CollectedHeap::addr_to_region(HeapWord* addr) const {
68 assert(is_in_reserved(addr),
69 "Cannot calculate region index for address " PTR_FORMAT " that is outside of the heap [" PTR_FORMAT ", " PTR_FORMAT ")",
70 p2i(addr), p2i(reserved_region().start()), p2i(reserved_region().end()));
71 return (uint)(pointer_delta(addr, reserved_region().start(), sizeof(uint8_t)) >> HeapRegion::LogOfHRGrainBytes);
72 }
73
74 inline HeapWord* G1CollectedHeap::bottom_addr_for_region(uint index) const {
75 return _hrm.reserved().start() + index * HeapRegion::GrainWords;
76 }
77
78 template <class T>
79 inline HeapRegion* G1CollectedHeap::heap_region_containing(const T addr) const {
80 assert(addr != NULL, "invariant");
81 assert(is_in_g1_reserved((const void*) addr),
82 "Address " PTR_FORMAT " is outside of the heap ranging from [" PTR_FORMAT " to " PTR_FORMAT ")",
83 p2i((void*)addr), p2i(g1_reserved().start()), p2i(g1_reserved().end()));
84 return _hrm.addr_to_region((HeapWord*) addr);
85 }
86
87 inline void G1CollectedHeap::old_set_add(HeapRegion* hr) {
88 _old_set.add(hr);
89 }
90
91 inline void G1CollectedHeap::old_set_remove(HeapRegion* hr) {
92 _old_set.remove(hr);
93 }
94
95 inline void G1CollectedHeap::archive_set_add(HeapRegion* hr) {
96 _archive_set.add(hr);
97 }
98
99 // It dirties the cards that cover the block so that the post
100 // write barrier never queues anything when updating objects on this
101 // block. It is assumed (and in fact we assert) that the block
102 // belongs to a young region.
103 inline void
104 G1CollectedHeap::dirty_young_block(HeapWord* start, size_t word_size) {
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43 default:
44 ShouldNotReachHere();
45 return NULL; // Keep some compilers happy
46 }
47 }
48
49 size_t G1CollectedHeap::desired_plab_sz(InCSetState dest) {
50 size_t gclab_word_size = alloc_buffer_stats(dest)->desired_plab_sz(workers()->active_workers());
51 // Prevent humongous PLAB sizes for two reasons:
52 // * PLABs are allocated using a similar paths as oops, but should
53 // never be in a humongous region
54 // * Allowing humongous PLABs needlessly churns the region free lists
55 return MIN2(_humongous_object_threshold_in_words, gclab_word_size);
56 }
57
58 // Inline functions for G1CollectedHeap
59
60 // Return the region with the given index. It assumes the index is valid.
61 inline HeapRegion* G1CollectedHeap::region_at(uint index) const { return _hrm.at(index); }
62
63 inline HeapRegion* G1CollectedHeap::region_at_or_null(uint index) const { return _hrm.at_or_null(index); }
64
65 inline HeapRegion* G1CollectedHeap::next_region_in_humongous(HeapRegion* hr) const {
66 return _hrm.next_region_in_humongous(hr);
67 }
68
69 inline uint G1CollectedHeap::addr_to_region(HeapWord* addr) const {
70 assert(is_in_reserved(addr),
71 "Cannot calculate region index for address " PTR_FORMAT " that is outside of the heap [" PTR_FORMAT ", " PTR_FORMAT ")",
72 p2i(addr), p2i(reserved_region().start()), p2i(reserved_region().end()));
73 return (uint)(pointer_delta(addr, reserved_region().start(), sizeof(uint8_t)) >> HeapRegion::LogOfHRGrainBytes);
74 }
75
76 inline HeapWord* G1CollectedHeap::bottom_addr_for_region(uint index) const {
77 return _hrm.reserved().start() + index * HeapRegion::GrainWords;
78 }
79
80 template <class T>
81 inline HeapRegion* G1CollectedHeap::heap_region_containing(const T addr) const {
82 assert(addr != NULL, "invariant");
83 assert(is_in_g1_reserved((const void*) addr),
84 "Address " PTR_FORMAT " is outside of the heap ranging from [" PTR_FORMAT " to " PTR_FORMAT ")",
85 p2i((void*)addr), p2i(g1_reserved().start()), p2i(g1_reserved().end()));
86 return _hrm.addr_to_region((HeapWord*) addr);
87 }
88
89 template <class T>
90 inline HeapRegion* G1CollectedHeap::heap_region_containing_or_null(const T addr) const {
91 assert(addr != NULL, "invariant");
92 assert(is_in_g1_reserved((const void*) addr),
93 "Address " PTR_FORMAT " is outside of the heap ranging from [" PTR_FORMAT " to " PTR_FORMAT ")",
94 p2i((void*)addr), p2i(g1_reserved().start()), p2i(g1_reserved().end()));
95 uint const region_idx = addr_to_region(addr);
96 return _hrm.is_available(region_idx) ? region_at(region_idx) : NULL;
97 }
98
99 inline void G1CollectedHeap::old_set_add(HeapRegion* hr) {
100 _old_set.add(hr);
101 }
102
103 inline void G1CollectedHeap::old_set_remove(HeapRegion* hr) {
104 _old_set.remove(hr);
105 }
106
107 inline void G1CollectedHeap::archive_set_add(HeapRegion* hr) {
108 _archive_set.add(hr);
109 }
110
111 // It dirties the cards that cover the block so that the post
112 // write barrier never queues anything when updating objects on this
113 // block. It is assumed (and in fact we assert) that the block
114 // belongs to a young region.
115 inline void
116 G1CollectedHeap::dirty_young_block(HeapWord* start, size_t word_size) {
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