100 inline HeapWord* G1ContiguousSpace::par_allocate(size_t min_word_size, 101 size_t desired_word_size, 102 size_t* actual_size) { 103 MutexLocker x(&_par_alloc_lock); 104 return allocate(min_word_size, desired_word_size, actual_size); 105 } 106 107 inline HeapWord* G1ContiguousSpace::block_start(const void* p) { 108 return _bot_part.block_start(p); 109 } 110 111 inline HeapWord* 112 G1ContiguousSpace::block_start_const(const void* p) const { 113 return _bot_part.block_start_const(p); 114 } 115 116 inline bool HeapRegion::is_obj_dead_with_size(const oop obj, G1CMBitMapRO* prev_bitmap, size_t* size) const { 117 HeapWord* addr = (HeapWord*) obj; 118 119 assert(addr < top(), "must be"); 120 assert(!is_closed_archive(), "Archive regions should not have references into interesting regions."); 121 assert(!is_humongous(), "Humongous objects not handled here"); 122 bool obj_is_dead = is_obj_dead(obj, prev_bitmap); 123 124 if (ClassUnloadingWithConcurrentMark && obj_is_dead) { 125 assert(!block_is_obj(addr) || is_open_archive(), "must be"); 126 *size = block_size_using_bitmap(addr, prev_bitmap); 127 } else { 128 assert(block_is_obj(addr), "must be"); 129 *size = obj->size(); 130 } 131 return obj_is_dead; 132 } 133 134 inline bool 135 HeapRegion::block_is_obj(const HeapWord* p) const { 136 G1CollectedHeap* g1h = G1CollectedHeap::heap(); 137 138 if (!this->is_in(p)) { 139 assert(is_continues_humongous(), "This case can only happen for humongous regions"); 140 return (p == humongous_start_region()->bottom()); 141 } 142 if (ClassUnloadingWithConcurrentMark) { 143 return !g1h->is_obj_dead(oop(p), this); 144 } 145 return p < top(); 146 } 147 148 inline size_t HeapRegion::block_size_using_bitmap(const HeapWord* addr, const G1CMBitMapRO* prev_bitmap) const { 149 assert(ClassUnloadingWithConcurrentMark, 150 "All blocks should be objects if class unloading isn't used, so this method should not be called. " 151 "HR: [" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT ") " 152 "addr: " PTR_FORMAT, 153 p2i(bottom()), p2i(top()), p2i(end()), p2i(addr)); 154 155 // Old regions' dead objects may have dead classes 156 // We need to find the next live object using the bitmap 157 HeapWord* next = prev_bitmap->getNextMarkedWordAddress(addr, prev_top_at_mark_start()); 158 159 assert(next > addr, "must get the next live object"); 160 return pointer_delta(next, addr); 161 } 162 163 inline bool HeapRegion::is_obj_dead(const oop obj, const G1CMBitMapRO* prev_bitmap) const { 164 assert(is_in_reserved(obj), "Object " PTR_FORMAT " must be in region", p2i(obj)); 165 return !obj_allocated_since_prev_marking(obj) && !prev_bitmap->isMarked((HeapWord*)obj); 166 } 167 168 inline size_t HeapRegion::block_size(const HeapWord *addr) const { 169 if (addr == top()) { 170 return pointer_delta(end(), addr); 171 } 172 173 if (block_is_obj(addr)) { 174 return oop(addr)->size(); 175 } 176 177 return block_size_using_bitmap(addr, G1CollectedHeap::heap()->concurrent_mark()->prevMarkBitMap()); 178 } 179 180 inline HeapWord* HeapRegion::par_allocate_no_bot_updates(size_t min_word_size, 181 size_t desired_word_size, 182 size_t* actual_word_size) { 183 assert(is_young(), "we can only skip BOT updates on young regions"); 184 return par_allocate_impl(min_word_size, desired_word_size, actual_word_size); 185 } | 100 inline HeapWord* G1ContiguousSpace::par_allocate(size_t min_word_size, 101 size_t desired_word_size, 102 size_t* actual_size) { 103 MutexLocker x(&_par_alloc_lock); 104 return allocate(min_word_size, desired_word_size, actual_size); 105 } 106 107 inline HeapWord* G1ContiguousSpace::block_start(const void* p) { 108 return _bot_part.block_start(p); 109 } 110 111 inline HeapWord* 112 G1ContiguousSpace::block_start_const(const void* p) const { 113 return _bot_part.block_start_const(p); 114 } 115 116 inline bool HeapRegion::is_obj_dead_with_size(const oop obj, G1CMBitMapRO* prev_bitmap, size_t* size) const { 117 HeapWord* addr = (HeapWord*) obj; 118 119 assert(addr < top(), "must be"); 120 assert(!is_closed_archive(), 121 "Closed archive regions should not have references into other regions"); 122 assert(!is_humongous(), "Humongous objects not handled here"); 123 bool obj_is_dead = is_obj_dead(obj, prev_bitmap); 124 125 if (ClassUnloadingWithConcurrentMark && obj_is_dead) { 126 assert(!block_is_obj(addr), "must be"); 127 *size = block_size_using_bitmap(addr, prev_bitmap); 128 } else { 129 assert(block_is_obj(addr), "must be"); 130 *size = obj->size(); 131 } 132 return obj_is_dead; 133 } 134 135 inline bool 136 HeapRegion::block_is_obj(const HeapWord* p) const { 137 G1CollectedHeap* g1h = G1CollectedHeap::heap(); 138 139 if (!this->is_in(p)) { 140 assert(is_continues_humongous(), "This case can only happen for humongous regions"); 141 return (p == humongous_start_region()->bottom()); 142 } 143 if (ClassUnloadingWithConcurrentMark) { 144 return !g1h->is_obj_dead(oop(p), this); 145 } 146 return p < top(); 147 } 148 149 inline size_t HeapRegion::block_size_using_bitmap(const HeapWord* addr, const G1CMBitMapRO* prev_bitmap) const { 150 assert(ClassUnloadingWithConcurrentMark, 151 "All blocks should be objects if class unloading isn't used, so this method should not be called. " 152 "HR: [" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT ") " 153 "addr: " PTR_FORMAT, 154 p2i(bottom()), p2i(top()), p2i(end()), p2i(addr)); 155 156 // Old regions' dead objects may have dead classes 157 // We need to find the next live object using the bitmap 158 HeapWord* next = prev_bitmap->getNextMarkedWordAddress(addr, prev_top_at_mark_start()); 159 160 assert(next > addr, "must get the next live object"); 161 return pointer_delta(next, addr); 162 } 163 164 inline bool HeapRegion::is_obj_dead(const oop obj, const G1CMBitMapRO* prev_bitmap) const { 165 assert(is_in_reserved(obj), "Object " PTR_FORMAT " must be in region", p2i(obj)); 166 return !obj_allocated_since_prev_marking(obj) && 167 !prev_bitmap->isMarked((HeapWord*)obj) && 168 !is_open_archive(); 169 } 170 171 inline size_t HeapRegion::block_size(const HeapWord *addr) const { 172 if (addr == top()) { 173 return pointer_delta(end(), addr); 174 } 175 176 if (block_is_obj(addr)) { 177 return oop(addr)->size(); 178 } 179 180 return block_size_using_bitmap(addr, G1CollectedHeap::heap()->concurrent_mark()->prevMarkBitMap()); 181 } 182 183 inline HeapWord* HeapRegion::par_allocate_no_bot_updates(size_t min_word_size, 184 size_t desired_word_size, 185 size_t* actual_word_size) { 186 assert(is_young(), "we can only skip BOT updates on young regions"); 187 return par_allocate_impl(min_word_size, desired_word_size, actual_word_size); 188 } |