1 // Copyright 2009-2010 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 #include "v8.h" 29 30 #include "heap-profiler.h" 31 32 #include "allocation-tracker.h" 33 #include "heap-snapshot-generator-inl.h" 34 35 namespace v8 { 36 namespace internal { 37 38 HeapProfiler::HeapProfiler(Heap* heap) 39 : ids_(new HeapObjectsMap(heap)), 40 names_(new StringsStorage(heap)), 41 next_snapshot_uid_(1), 42 is_tracking_object_moves_(false) { 43 } 44 45 46 static void DeleteHeapSnapshot(HeapSnapshot** snapshot_ptr) { 47 delete *snapshot_ptr; 48 } 49 50 51 HeapProfiler::~HeapProfiler() { 52 snapshots_.Iterate(DeleteHeapSnapshot); 53 snapshots_.Clear(); 54 } 55 56 57 void HeapProfiler::DeleteAllSnapshots() { 58 snapshots_.Iterate(DeleteHeapSnapshot); 59 snapshots_.Clear(); 60 names_.Reset(new StringsStorage(heap())); 61 } 62 63 64 void HeapProfiler::RemoveSnapshot(HeapSnapshot* snapshot) { 65 snapshots_.RemoveElement(snapshot); 66 } 67 68 69 void HeapProfiler::DefineWrapperClass( 70 uint16_t class_id, v8::HeapProfiler::WrapperInfoCallback callback) { 71 ASSERT(class_id != v8::HeapProfiler::kPersistentHandleNoClassId); 72 if (wrapper_callbacks_.length() <= class_id) { 73 wrapper_callbacks_.AddBlock( 74 NULL, class_id - wrapper_callbacks_.length() + 1); 75 } 76 wrapper_callbacks_[class_id] = callback; 77 } 78 79 80 v8::RetainedObjectInfo* HeapProfiler::ExecuteWrapperClassCallback( 81 uint16_t class_id, Object** wrapper) { 82 if (wrapper_callbacks_.length() <= class_id) return NULL; 83 return wrapper_callbacks_[class_id]( 84 class_id, Utils::ToLocal(Handle<Object>(wrapper))); 85 } 86 87 88 HeapSnapshot* HeapProfiler::TakeSnapshot( 89 const char* name, 90 v8::ActivityControl* control, 91 v8::HeapProfiler::ObjectNameResolver* resolver) { 92 HeapSnapshot* result = new HeapSnapshot(this, name, next_snapshot_uid_++); 93 { 94 HeapSnapshotGenerator generator(result, control, resolver, heap()); 95 if (!generator.GenerateSnapshot()) { 96 delete result; 97 result = NULL; 98 } else { 99 snapshots_.Add(result); 100 } 101 } 102 ids_->RemoveDeadEntries(); 103 is_tracking_object_moves_ = true; 104 return result; 105 } 106 107 108 HeapSnapshot* HeapProfiler::TakeSnapshot( 109 String* name, 110 v8::ActivityControl* control, 111 v8::HeapProfiler::ObjectNameResolver* resolver) { 112 return TakeSnapshot(names_->GetName(name), control, resolver); 113 } 114 115 116 void HeapProfiler::StartHeapObjectsTracking(bool track_allocations) { 117 ids_->UpdateHeapObjectsMap(); 118 is_tracking_object_moves_ = true; 119 ASSERT(!is_tracking_allocations()); 120 if (track_allocations) { 121 allocation_tracker_.Reset(new AllocationTracker(*ids_, *names_)); 122 heap()->DisableInlineAllocation(); 123 } 124 } 125 126 127 SnapshotObjectId HeapProfiler::PushHeapObjectsStats(OutputStream* stream) { 128 return ids_->PushHeapObjectsStats(stream); 129 } 130 131 132 void HeapProfiler::StopHeapObjectsTracking() { 133 ids_->StopHeapObjectsTracking(); 134 if (is_tracking_allocations()) { 135 allocation_tracker_.Reset(NULL); 136 heap()->EnableInlineAllocation(); 137 } 138 } 139 140 141 size_t HeapProfiler::GetMemorySizeUsedByProfiler() { 142 size_t size = sizeof(*this); 143 size += names_->GetUsedMemorySize(); 144 size += ids_->GetUsedMemorySize(); 145 size += GetMemoryUsedByList(snapshots_); 146 for (int i = 0; i < snapshots_.length(); ++i) { 147 size += snapshots_[i]->RawSnapshotSize(); 148 } 149 return size; 150 } 151 152 153 int HeapProfiler::GetSnapshotsCount() { 154 return snapshots_.length(); 155 } 156 157 158 HeapSnapshot* HeapProfiler::GetSnapshot(int index) { 159 return snapshots_.at(index); 160 } 161 162 163 SnapshotObjectId HeapProfiler::GetSnapshotObjectId(Handle<Object> obj) { 164 if (!obj->IsHeapObject()) 165 return v8::HeapProfiler::kUnknownObjectId; 166 return ids_->FindEntry(HeapObject::cast(*obj)->address()); 167 } 168 169 170 void HeapProfiler::ObjectMoveEvent(Address from, Address to, int size) { 171 ids_->MoveObject(from, to, size); 172 } 173 174 175 void HeapProfiler::AllocationEvent(Address addr, int size) { 176 DisallowHeapAllocation no_allocation; 177 if (!allocation_tracker_.is_empty()) { 178 allocation_tracker_->AllocationEvent(addr, size); 179 } 180 } 181 182 183 void HeapProfiler::UpdateObjectSizeEvent(Address addr, int size) { 184 ids_->UpdateObjectSize(addr, size); 185 } 186 187 188 void HeapProfiler::SetRetainedObjectInfo(UniqueId id, 189 RetainedObjectInfo* info) { 190 // TODO(yurus, marja): Don't route this information through GlobalHandles. 191 heap()->isolate()->global_handles()->SetRetainedObjectInfo(id, info); 192 } 193 194 195 Handle<HeapObject> HeapProfiler::FindHeapObjectById(SnapshotObjectId id) { 196 heap()->CollectAllGarbage(Heap::kMakeHeapIterableMask, 197 "HeapProfiler::FindHeapObjectById"); 198 DisallowHeapAllocation no_allocation; 199 HeapObject* object = NULL; 200 HeapIterator iterator(heap(), HeapIterator::kFilterUnreachable); 201 // Make sure that object with the given id is still reachable. 202 for (HeapObject* obj = iterator.next(); 203 obj != NULL; 204 obj = iterator.next()) { 205 if (ids_->FindEntry(obj->address()) == id) { 206 ASSERT(object == NULL); 207 object = obj; 208 // Can't break -- kFilterUnreachable requires full heap traversal. 209 } 210 } 211 return object != NULL ? Handle<HeapObject>(object) : Handle<HeapObject>(); 212 } 213 214 215 } } // namespace v8::internal 216
