Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_ALLOCATION_TRACKER_H_ |
| 6 | #define V8_ALLOCATION_TRACKER_H_ |
| 7 | |
| 8 | #include <map> |
| 9 | |
| 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | |
| 13 | class HeapObjectsMap; |
| 14 | |
| 15 | class AllocationTraceTree; |
| 16 | |
| 17 | class AllocationTraceNode { |
| 18 | public: |
| 19 | AllocationTraceNode(AllocationTraceTree* tree, |
| 20 | unsigned function_info_index); |
| 21 | ~AllocationTraceNode(); |
| 22 | AllocationTraceNode* FindChild(unsigned function_info_index); |
| 23 | AllocationTraceNode* FindOrAddChild(unsigned function_info_index); |
| 24 | void AddAllocation(unsigned size); |
| 25 | |
| 26 | unsigned function_info_index() const { return function_info_index_; } |
| 27 | unsigned allocation_size() const { return total_size_; } |
| 28 | unsigned allocation_count() const { return allocation_count_; } |
| 29 | unsigned id() const { return id_; } |
| 30 | Vector<AllocationTraceNode*> children() const { return children_.ToVector(); } |
| 31 | |
| 32 | void Print(int indent, AllocationTracker* tracker); |
| 33 | |
| 34 | private: |
| 35 | AllocationTraceTree* tree_; |
| 36 | unsigned function_info_index_; |
| 37 | unsigned total_size_; |
| 38 | unsigned allocation_count_; |
| 39 | unsigned id_; |
| 40 | List<AllocationTraceNode*> children_; |
| 41 | |
| 42 | DISALLOW_COPY_AND_ASSIGN(AllocationTraceNode); |
| 43 | }; |
| 44 | |
| 45 | |
| 46 | class AllocationTraceTree { |
| 47 | public: |
| 48 | AllocationTraceTree(); |
| 49 | ~AllocationTraceTree(); |
| 50 | AllocationTraceNode* AddPathFromEnd(const Vector<unsigned>& path); |
| 51 | AllocationTraceNode* root() { return &root_; } |
| 52 | unsigned next_node_id() { return next_node_id_++; } |
| 53 | void Print(AllocationTracker* tracker); |
| 54 | |
| 55 | private: |
| 56 | unsigned next_node_id_; |
| 57 | AllocationTraceNode root_; |
| 58 | |
| 59 | DISALLOW_COPY_AND_ASSIGN(AllocationTraceTree); |
| 60 | }; |
| 61 | |
| 62 | |
| 63 | class AddressToTraceMap { |
| 64 | public: |
| 65 | void AddRange(Address addr, int size, unsigned node_id); |
| 66 | unsigned GetTraceNodeId(Address addr); |
| 67 | void MoveObject(Address from, Address to, int size); |
| 68 | void Clear(); |
| 69 | size_t size() { return ranges_.size(); } |
| 70 | void Print(); |
| 71 | |
| 72 | private: |
| 73 | struct RangeStack { |
| 74 | RangeStack(Address start, unsigned node_id) |
| 75 | : start(start), trace_node_id(node_id) {} |
| 76 | Address start; |
| 77 | unsigned trace_node_id; |
| 78 | }; |
| 79 | // [start, end) -> trace |
| 80 | typedef std::map<Address, RangeStack> RangeMap; |
| 81 | |
| 82 | void RemoveRange(Address start, Address end); |
| 83 | |
| 84 | RangeMap ranges_; |
| 85 | }; |
| 86 | |
| 87 | class AllocationTracker { |
| 88 | public: |
| 89 | struct FunctionInfo { |
| 90 | FunctionInfo(); |
| 91 | const char* name; |
| 92 | SnapshotObjectId function_id; |
| 93 | const char* script_name; |
| 94 | int script_id; |
| 95 | int line; |
| 96 | int column; |
| 97 | }; |
| 98 | |
| 99 | AllocationTracker(HeapObjectsMap* ids, StringsStorage* names); |
| 100 | ~AllocationTracker(); |
| 101 | |
| 102 | void PrepareForSerialization(); |
| 103 | void AllocationEvent(Address addr, int size); |
| 104 | |
| 105 | AllocationTraceTree* trace_tree() { return &trace_tree_; } |
| 106 | const List<FunctionInfo*>& function_info_list() const { |
| 107 | return function_info_list_; |
| 108 | } |
| 109 | AddressToTraceMap* address_to_trace() { return &address_to_trace_; } |
| 110 | |
| 111 | private: |
| 112 | unsigned AddFunctionInfo(SharedFunctionInfo* info, SnapshotObjectId id); |
| 113 | static void DeleteFunctionInfo(FunctionInfo** info); |
| 114 | unsigned functionInfoIndexForVMState(StateTag state); |
| 115 | |
| 116 | class UnresolvedLocation { |
| 117 | public: |
| 118 | UnresolvedLocation(Script* script, int start, FunctionInfo* info); |
| 119 | ~UnresolvedLocation(); |
| 120 | void Resolve(); |
| 121 | |
| 122 | private: |
| 123 | static void HandleWeakScript( |
| 124 | const v8::WeakCallbackData<v8::Value, void>& data); |
| 125 | |
| 126 | Handle<Script> script_; |
| 127 | int start_position_; |
| 128 | FunctionInfo* info_; |
| 129 | }; |
| 130 | static void DeleteUnresolvedLocation(UnresolvedLocation** location); |
| 131 | |
| 132 | static const int kMaxAllocationTraceLength = 64; |
| 133 | HeapObjectsMap* ids_; |
| 134 | StringsStorage* names_; |
| 135 | AllocationTraceTree trace_tree_; |
| 136 | unsigned allocation_trace_buffer_[kMaxAllocationTraceLength]; |
| 137 | List<FunctionInfo*> function_info_list_; |
| 138 | HashMap id_to_function_info_index_; |
| 139 | List<UnresolvedLocation*> unresolved_locations_; |
| 140 | unsigned info_index_for_other_state_; |
| 141 | AddressToTraceMap address_to_trace_; |
| 142 | |
| 143 | DISALLOW_COPY_AND_ASSIGN(AllocationTracker); |
| 144 | }; |
| 145 | |
| 146 | } } // namespace v8::internal |
| 147 | |
| 148 | #endif // V8_ALLOCATION_TRACKER_H_ |