92 } |
92 } |
93 |
93 |
94 inline bool |
94 inline bool |
95 HeapRegion::block_is_obj(const HeapWord* p) const { |
95 HeapRegion::block_is_obj(const HeapWord* p) const { |
96 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
96 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
97 return !g1h->is_obj_dead(oop(p), this); |
97 if (ClassUnloadingWithConcurrentMark) { |
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98 return !g1h->is_obj_dead(oop(p), this); |
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99 } |
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100 return p < top(); |
98 } |
101 } |
99 |
102 |
100 inline size_t |
103 inline size_t |
101 HeapRegion::block_size(const HeapWord *addr) const { |
104 HeapRegion::block_size(const HeapWord *addr) const { |
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105 if (addr == top()) { |
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106 return pointer_delta(end(), addr); |
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107 } |
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108 |
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109 if (block_is_obj(addr)) { |
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110 return oop(addr)->size(); |
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111 } |
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112 |
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113 assert(ClassUnloadingWithConcurrentMark, |
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114 err_msg("All blocks should be objects if G1 Class Unloading isn't used. " |
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115 "HR: ["PTR_FORMAT", "PTR_FORMAT", "PTR_FORMAT") " |
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116 "addr: " PTR_FORMAT, |
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117 p2i(bottom()), p2i(top()), p2i(end()), p2i(addr))); |
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118 |
102 // Old regions' dead objects may have dead classes |
119 // Old regions' dead objects may have dead classes |
103 // We need to find the next live object in some other |
120 // We need to find the next live object in some other |
104 // manner than getting the oop size |
121 // manner than getting the oop size |
105 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
122 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
106 if (g1h->is_obj_dead(oop(addr), this)) { |
123 HeapWord* next = g1h->concurrent_mark()->prevMarkBitMap()-> |
107 HeapWord* next = g1h->concurrent_mark()->prevMarkBitMap()-> |
124 getNextMarkedWordAddress(addr, prev_top_at_mark_start()); |
108 getNextMarkedWordAddress(addr, prev_top_at_mark_start()); |
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109 |
125 |
110 assert(next > addr, "must get the next live object"); |
126 assert(next > addr, "must get the next live object"); |
111 |
127 return pointer_delta(next, addr); |
112 return pointer_delta(next, addr); |
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113 } else if (addr == top()) { |
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114 return pointer_delta(end(), addr); |
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115 } |
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116 return oop(addr)->size(); |
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117 } |
128 } |
118 |
129 |
119 inline HeapWord* HeapRegion::par_allocate_no_bot_updates(size_t word_size) { |
130 inline HeapWord* HeapRegion::par_allocate_no_bot_updates(size_t word_size) { |
120 assert(is_young(), "we can only skip BOT updates on young regions"); |
131 assert(is_young(), "we can only skip BOT updates on young regions"); |
121 return par_allocate_impl(word_size, end()); |
132 return par_allocate_impl(word_size, end()); |