55 // from total chunks to get total free chunck size
56 void MallocMemorySnapshot::make_adjustment() {
57 size_t arena_size = total_arena();
58 int chunk_idx = NMTUtil::flag_to_index(mtChunk);
59 _malloc[chunk_idx].record_free(arena_size);
60 }
61
62
63 void MallocMemorySummary::initialize() {
64 assert(sizeof(_snapshot) >= sizeof(MallocMemorySnapshot), "Sanity Check");
65 // Uses placement new operator to initialize static area.
66 ::new ((void*)_snapshot)MallocMemorySnapshot();
67 }
68
69 void MallocHeader::release() const {
70 // Tracking already shutdown, no housekeeping is needed anymore
71 if (MemTracker::tracking_level() <= NMT_minimal) return;
72
73 MallocMemorySummary::record_free(size(), flags());
74 MallocMemorySummary::record_free_malloc_header(sizeof(MallocHeader));
75 if (tracking_level() == NMT_detail) {
76 MallocSiteTable::deallocation_at(size(), _bucket_idx, _pos_idx);
77 }
78 }
79
80 bool MallocHeader::record_malloc_site(const NativeCallStack& stack, size_t size,
81 size_t* bucket_idx, size_t* pos_idx) const {
82 bool ret = MallocSiteTable::allocation_at(stack, size, bucket_idx, pos_idx);
83
84 // Something went wrong, could be OOM or overflow malloc site table.
85 // We want to keep tracking data under OOM circumstance, so transition to
86 // summary tracking.
87 if (!ret) {
88 MemTracker::transition_to(NMT_summary);
89 }
90 return ret;
91 }
92
93 bool MallocHeader::get_stack(NativeCallStack& stack) const {
94 return MallocSiteTable::access_stack(stack, _bucket_idx, _pos_idx);
95 }
111 assert (from != NMT_minimal, "cannot transition from minimal state");
112
113 if (from == NMT_detail) {
114 assert(to == NMT_minimal || to == NMT_summary, "Just check");
115 MallocSiteTable::shutdown();
116 }
117 return true;
118 }
119
120 // Record a malloc memory allocation
121 void* MallocTracker::record_malloc(void* malloc_base, size_t size, MEMFLAGS flags,
122 const NativeCallStack& stack, NMT_TrackingLevel level) {
123 void* memblock; // the address for user data
124 MallocHeader* header = NULL;
125
126 if (malloc_base == NULL) {
127 return NULL;
128 }
129
130 // Uses placement global new operator to initialize malloc header
131 switch(level) {
132 case NMT_off:
133 return malloc_base;
134 case NMT_minimal: {
135 MallocHeader* hdr = ::new (malloc_base) MallocHeader();
136 break;
137 }
138 case NMT_summary: {
139 assert(size <= MAX_MALLOC_SIZE, "malloc size overrun for NMT");
140 header = ::new (malloc_base) MallocHeader(size, flags);
141 break;
142 }
143 case NMT_detail: {
144 assert(size <= MAX_MALLOC_SIZE, "malloc size overrun for NMT");
145 header = ::new (malloc_base) MallocHeader(size, flags, stack);
146 break;
147 }
148 default:
149 ShouldNotReachHere();
150 }
151 memblock = (void*)((char*)malloc_base + sizeof(MallocHeader));
152
153 // The alignment check: 8 bytes alignment for 32 bit systems.
154 // 16 bytes alignment for 64-bit systems.
155 assert(((size_t)memblock & (sizeof(size_t) * 2 - 1)) == 0, "Alignment check");
156
157 // Sanity check
158 assert(get_memory_tracking_level(memblock) == level,
159 "Wrong tracking level");
160
161 #ifdef ASSERT
162 if (level > NMT_minimal) {
163 // Read back
164 assert(get_size(memblock) == size, "Wrong size");
165 assert(get_flags(memblock) == flags, "Wrong flags");
166 }
167 #endif
168
169 return memblock;
170 }
171
172 void* MallocTracker::record_free(void* memblock) {
173 // Never turned on
174 if (MemTracker::tracking_level() == NMT_off ||
175 memblock == NULL) {
176 return memblock;
177 }
178 MallocHeader* header = malloc_header(memblock);
179 header->release();
180
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55 // from total chunks to get total free chunck size
56 void MallocMemorySnapshot::make_adjustment() {
57 size_t arena_size = total_arena();
58 int chunk_idx = NMTUtil::flag_to_index(mtChunk);
59 _malloc[chunk_idx].record_free(arena_size);
60 }
61
62
63 void MallocMemorySummary::initialize() {
64 assert(sizeof(_snapshot) >= sizeof(MallocMemorySnapshot), "Sanity Check");
65 // Uses placement new operator to initialize static area.
66 ::new ((void*)_snapshot)MallocMemorySnapshot();
67 }
68
69 void MallocHeader::release() const {
70 // Tracking already shutdown, no housekeeping is needed anymore
71 if (MemTracker::tracking_level() <= NMT_minimal) return;
72
73 MallocMemorySummary::record_free(size(), flags());
74 MallocMemorySummary::record_free_malloc_header(sizeof(MallocHeader));
75 if (MemTracker::tracking_level() == NMT_detail) {
76 MallocSiteTable::deallocation_at(size(), _bucket_idx, _pos_idx);
77 }
78 }
79
80 bool MallocHeader::record_malloc_site(const NativeCallStack& stack, size_t size,
81 size_t* bucket_idx, size_t* pos_idx) const {
82 bool ret = MallocSiteTable::allocation_at(stack, size, bucket_idx, pos_idx);
83
84 // Something went wrong, could be OOM or overflow malloc site table.
85 // We want to keep tracking data under OOM circumstance, so transition to
86 // summary tracking.
87 if (!ret) {
88 MemTracker::transition_to(NMT_summary);
89 }
90 return ret;
91 }
92
93 bool MallocHeader::get_stack(NativeCallStack& stack) const {
94 return MallocSiteTable::access_stack(stack, _bucket_idx, _pos_idx);
95 }
111 assert (from != NMT_minimal, "cannot transition from minimal state");
112
113 if (from == NMT_detail) {
114 assert(to == NMT_minimal || to == NMT_summary, "Just check");
115 MallocSiteTable::shutdown();
116 }
117 return true;
118 }
119
120 // Record a malloc memory allocation
121 void* MallocTracker::record_malloc(void* malloc_base, size_t size, MEMFLAGS flags,
122 const NativeCallStack& stack, NMT_TrackingLevel level) {
123 void* memblock; // the address for user data
124 MallocHeader* header = NULL;
125
126 if (malloc_base == NULL) {
127 return NULL;
128 }
129
130 // Uses placement global new operator to initialize malloc header
131
132 if (level == NMT_off) {
133 return malloc_base;
134 }
135
136 header = ::new (malloc_base)MallocHeader(size, flags, stack, level);
137 memblock = (void*)((char*)malloc_base + sizeof(MallocHeader));
138
139 // The alignment check: 8 bytes alignment for 32 bit systems.
140 // 16 bytes alignment for 64-bit systems.
141 assert(((size_t)memblock & (sizeof(size_t) * 2 - 1)) == 0, "Alignment check");
142
143 #ifdef ASSERT
144 if (level > NMT_minimal) {
145 // Read back
146 assert(get_size(memblock) == size, "Wrong size");
147 assert(get_flags(memblock) == flags, "Wrong flags");
148 }
149 #endif
150
151 return memblock;
152 }
153
154 void* MallocTracker::record_free(void* memblock) {
155 // Never turned on
156 if (MemTracker::tracking_level() == NMT_off ||
157 memblock == NULL) {
158 return memblock;
159 }
160 MallocHeader* header = malloc_header(memblock);
161 header->release();
162
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