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Unified Diff: src/allocation-tracker.h

Issue 34733004: Record allocation stack traces (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Mark allocated block as FreeSpace before iterating call stack Created 7 years, 2 months ago
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Index: src/allocation-tracker.h
diff --git a/src/allocation-tracker.h b/src/allocation-tracker.h
new file mode 100644
index 0000000000000000000000000000000000000000..617cf902e8ad5604f961f468fc613d2ce186ec36
--- /dev/null
+++ b/src/allocation-tracker.h
@@ -0,0 +1,138 @@
+// 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.
+
+#ifndef V8_ALLOCATION_TRACKER_H_
+#define V8_ALLOCATION_TRACKER_H_
+
+namespace v8 {
+namespace internal {
+
+class HeapObjectsMap;
+
+class AllocationTraceTree;
+
+class AllocationTraceNode {
+ public:
+ AllocationTraceNode(AllocationTraceTree* tree,
+ SnapshotObjectId shared_function_info_id);
+ ~AllocationTraceNode();
+ AllocationTraceNode* FindChild(SnapshotObjectId shared_function_info_id);
+ AllocationTraceNode* FindOrAddChild(SnapshotObjectId shared_function_info_id);
+ void AddAllocation(unsigned size);
+
+ SnapshotObjectId function_id() const { return function_id_; }
+ unsigned allocation_size() const { return total_size_; }
+ unsigned allocation_count() const { return allocation_count_; }
+ unsigned id() const { return id_; }
+ Vector<AllocationTraceNode*> children() const { return children_.ToVector(); }
+
+ void Print(int indent, AllocationTracker* tracker);
+
+ private:
+ AllocationTraceTree* tree_;
+ SnapshotObjectId function_id_;
+ unsigned total_size_;
+ unsigned allocation_count_;
+ unsigned id_;
+ List<AllocationTraceNode*> children_;
+
+ DISALLOW_COPY_AND_ASSIGN(AllocationTraceNode);
+};
+
+
+class AllocationTraceTree {
+ public:
+ AllocationTraceTree();
+ ~AllocationTraceTree();
+ AllocationTraceNode* AddPathFromEnd(const Vector<SnapshotObjectId>& path);
+ AllocationTraceNode* root() { return &root_; }
+ unsigned next_node_id() { return next_node_id_++; }
+ void Print(AllocationTracker* tracker);
+
+ private:
+ unsigned next_node_id_;
+ AllocationTraceNode root_;
+
+ DISALLOW_COPY_AND_ASSIGN(AllocationTraceTree);
+};
+
+
+class AllocationTracker {
+ public:
+ struct FunctionInfo {
+ FunctionInfo();
+ const char* name;
+ const char* script_name;
+ int script_id;
+ int line;
+ int column;
+ };
+
+ AllocationTracker(HeapObjectsMap* ids, StringsStorage* names);
+ ~AllocationTracker();
+
+ void PrepareForSerialization();
+ void NewObjectEvent(Address addr, int size);
+
+ AllocationTraceTree* trace_tree() { return &trace_tree_; }
+ HashMap* id_to_function_info() { return &id_to_function_info_; }
+ FunctionInfo* GetFunctionInfo(SnapshotObjectId id);
+
+ private:
+ void AddFunctionInfo(SharedFunctionInfo* info, SnapshotObjectId id);
+
+ class UnresolvedLocation {
+ public:
+ UnresolvedLocation(Script* script, int start, FunctionInfo* info);
+ ~UnresolvedLocation();
+ void Resolve();
+
+ private:
+ static void HandleWeakScript(v8::Isolate* isolate,
+ v8::Persistent<v8::Value>* obj,
+ void* data);
+ Handle<Script> script_;
+ int start_position_;
+ FunctionInfo* info_;
+ };
+ static void DeleteUnresolvedLocation(UnresolvedLocation** location);
+
+ static const int kMaxAllocationTraceLength = 64;
+ HeapObjectsMap* ids_;
+ StringsStorage* names_;
+ AllocationTraceTree trace_tree_;
+ SnapshotObjectId allocation_trace_buffer_[kMaxAllocationTraceLength];
+ HashMap id_to_function_info_;
+ List<UnresolvedLocation*> unresolved_locations_;
+
+ DISALLOW_COPY_AND_ASSIGN(AllocationTracker);
+};
+
+} } // namespace v8::internal
+
+#endif // V8_ALLOCATION_TRACKER_H_
+
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