| // Copyright 2013 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "v8.h" |
| |
| #include "allocation-tracker.h" |
| |
| #include "heap-snapshot-generator.h" |
| #include "frames-inl.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| AllocationTraceNode::AllocationTraceNode( |
| AllocationTraceTree* tree, SnapshotObjectId shared_function_info_id) |
| : tree_(tree), |
| function_id_(shared_function_info_id), |
| total_size_(0), |
| allocation_count_(0), |
| id_(tree->next_node_id()) { |
| } |
| |
| |
| AllocationTraceNode::~AllocationTraceNode() { |
| } |
| |
| |
| AllocationTraceNode* AllocationTraceNode::FindChild(SnapshotObjectId id) { |
| for (int i = 0; i < children_.length(); i++) { |
| AllocationTraceNode* node = children_[i]; |
| if (node->function_id() == id) return node; |
| } |
| return NULL; |
| } |
| |
| |
| AllocationTraceNode* AllocationTraceNode::FindOrAddChild(SnapshotObjectId id) { |
| AllocationTraceNode* child = FindChild(id); |
| if (child == NULL) { |
| child = new AllocationTraceNode(tree_, id); |
| children_.Add(child); |
| } |
| return child; |
| } |
| |
| |
| void AllocationTraceNode::AddAllocation(unsigned size) { |
| total_size_ += size; |
| ++allocation_count_; |
| } |
| |
| |
| void AllocationTraceNode::Print(int indent, AllocationTracker* tracker) { |
| OS::Print("%10u %10u %*c", total_size_, allocation_count_, indent, ' '); |
| if (tracker != NULL) { |
| const char* name = "<unknown function>"; |
| if (function_id_ != 0) { |
| AllocationTracker::FunctionInfo* info = |
| tracker->GetFunctionInfo(function_id_); |
| if (info != NULL) { |
| name = info->name; |
| } |
| } |
| OS::Print("%s #%u", name, id_); |
| } else { |
| OS::Print("%u #%u", function_id_, id_); |
| } |
| OS::Print("\n"); |
| indent += 2; |
| for (int i = 0; i < children_.length(); i++) { |
| children_[i]->Print(indent, tracker); |
| } |
| } |
| |
| |
| AllocationTraceTree::AllocationTraceTree() |
| : next_node_id_(1), |
| root_(this, 0) { |
| } |
| |
| |
| AllocationTraceTree::~AllocationTraceTree() { |
| } |
| |
| |
| AllocationTraceNode* AllocationTraceTree::AddPathFromEnd( |
| const Vector<SnapshotObjectId>& path) { |
| AllocationTraceNode* node = root(); |
| for (SnapshotObjectId* entry = path.start() + path.length() - 1; |
| entry != path.start() - 1; |
| --entry) { |
| node = node->FindOrAddChild(*entry); |
| } |
| return node; |
| } |
| |
| |
| void AllocationTraceTree::Print(AllocationTracker* tracker) { |
| OS::Print("[AllocationTraceTree:]\n"); |
| OS::Print("Total size | Allocation count | Function id | id\n"); |
| root()->Print(0, tracker); |
| } |
| |
| void AllocationTracker::DeleteUnresolvedLocation( |
| UnresolvedLocation** location) { |
| delete *location; |
| } |
| |
| |
| AllocationTracker::FunctionInfo::FunctionInfo() |
| : name(""), |
| script_name(""), |
| script_id(0), |
| line(-1), |
| column(-1) { |
| } |
| |
| |
| static bool AddressesMatch(void* key1, void* key2) { |
| return key1 == key2; |
| } |
| |
| |
| AllocationTracker::AllocationTracker( |
| HeapObjectsMap* ids, StringsStorage* names) |
| : ids_(ids), |
| names_(names), |
| id_to_function_info_(AddressesMatch) { |
| } |
| |
| |
| AllocationTracker::~AllocationTracker() { |
| unresolved_locations_.Iterate(DeleteUnresolvedLocation); |
| } |
| |
| |
| void AllocationTracker::PrepareForSerialization() { |
| List<UnresolvedLocation*> copy(unresolved_locations_.length()); |
| copy.AddAll(unresolved_locations_); |
| unresolved_locations_.Clear(); |
| for (int i = 0; i < copy.length(); i++) { |
| copy[i]->Resolve(); |
| delete copy[i]; |
| } |
| } |
| |
| |
| void AllocationTracker::NewObjectEvent(Address addr, int size) { |
| DisallowHeapAllocation no_allocation; |
| Heap* heap = ids_->heap(); |
| |
| // Mark the new block as FreeSpace to make sure the heap is iterable |
| // while we are capturing stack trace. |
| FreeListNode::FromAddress(addr)->set_size(heap, size); |
| ASSERT_EQ(HeapObject::FromAddress(addr)->Size(), size); |
| ASSERT(FreeListNode::IsFreeListNode(HeapObject::FromAddress(addr))); |
| |
| Isolate* isolate = heap->isolate(); |
| int length = 0; |
| StackTraceFrameIterator it(isolate); |
| while (!it.done() && length < kMaxAllocationTraceLength) { |
| JavaScriptFrame* frame = it.frame(); |
| SharedFunctionInfo* shared = frame->function()->shared(); |
| SnapshotObjectId id = ids_->FindEntry(shared->address()); |
| allocation_trace_buffer_[length++] = id; |
| AddFunctionInfo(shared, id); |
| it.Advance(); |
| } |
| AllocationTraceNode* top_node = trace_tree_.AddPathFromEnd( |
| Vector<SnapshotObjectId>(allocation_trace_buffer_, length)); |
| top_node->AddAllocation(size); |
| } |
| |
| |
| static uint32_t SnapshotObjectIdHash(SnapshotObjectId id) { |
| return ComputeIntegerHash(static_cast<uint32_t>(id), |
| v8::internal::kZeroHashSeed); |
| } |
| |
| |
| AllocationTracker::FunctionInfo* AllocationTracker::GetFunctionInfo( |
| SnapshotObjectId id) { |
| HashMap::Entry* entry = id_to_function_info_.Lookup( |
| reinterpret_cast<void*>(id), SnapshotObjectIdHash(id), false); |
| if (entry == NULL) { |
| return NULL; |
| } |
| return reinterpret_cast<FunctionInfo*>(entry->value); |
| } |
| |
| |
| void AllocationTracker::AddFunctionInfo(SharedFunctionInfo* shared, |
| SnapshotObjectId id) { |
| HashMap::Entry* entry = id_to_function_info_.Lookup( |
| reinterpret_cast<void*>(id), SnapshotObjectIdHash(id), true); |
| if (entry->value == NULL) { |
| FunctionInfo* info = new FunctionInfo(); |
| info->name = names_->GetFunctionName(shared->DebugName()); |
| if (shared->script()->IsScript()) { |
| Script* script = Script::cast(shared->script()); |
| if (script->name()->IsName()) { |
| Name* name = Name::cast(script->name()); |
| info->script_name = names_->GetName(name); |
| } |
| info->script_id = script->id()->value(); |
| // Converting start offset into line and column may cause heap |
| // allocations so we postpone them until snapshot serialization. |
| unresolved_locations_.Add(new UnresolvedLocation( |
| script, |
| shared->start_position(), |
| info)); |
| } |
| entry->value = info; |
| } |
| } |
| |
| |
| AllocationTracker::UnresolvedLocation::UnresolvedLocation( |
| Script* script, int start, FunctionInfo* info) |
| : start_position_(start), |
| info_(info) { |
| script_ = Handle<Script>::cast( |
| script->GetIsolate()->global_handles()->Create(script)); |
| GlobalHandles::MakeWeak( |
| reinterpret_cast<Object**>(script_.location()), |
| this, &HandleWeakScript); |
| } |
| |
| |
| AllocationTracker::UnresolvedLocation::~UnresolvedLocation() { |
| if (!script_.is_null()) { |
| script_->GetIsolate()->global_handles()->Destroy( |
| reinterpret_cast<Object**>(script_.location())); |
| } |
| } |
| |
| |
| void AllocationTracker::UnresolvedLocation::Resolve() { |
| if (script_.is_null()) return; |
| info_->line = GetScriptLineNumber(script_, start_position_); |
| info_->column = GetScriptColumnNumber(script_, start_position_); |
| } |
| |
| |
| void AllocationTracker::UnresolvedLocation::HandleWeakScript( |
| v8::Isolate* isolate, |
| v8::Persistent<v8::Value>* obj, |
| void* data) { |
| UnresolvedLocation* location = reinterpret_cast<UnresolvedLocation*>(data); |
| location->script_ = Handle<Script>::null(); |
| obj->Dispose(); |
| } |
| |
| |
| } } // namespace v8::internal |