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// Copyright 2013 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_PROFILER_ALLOCATION_TRACKER_H_
#define V8_PROFILER_ALLOCATION_TRACKER_H_
#include <map>
#include <vector>
#include "include/v8-profiler.h"
#include "src/base/hashmap.h"
#include "src/handles.h"
#include "src/vector.h"
namespace v8 {
namespace internal {
// Forward declarations.
class AllocationTraceTree;
class AllocationTracker;
class HeapObjectsMap;
class SharedFunctionInfo;
class StringsStorage;
class AllocationTraceNode {
public:
AllocationTraceNode(AllocationTraceTree* tree,
unsigned function_info_index);
~AllocationTraceNode();
AllocationTraceNode* FindChild(unsigned function_info_index);
AllocationTraceNode* FindOrAddChild(unsigned function_info_index);
void AddAllocation(unsigned size);
unsigned function_info_index() const { return function_info_index_; }
unsigned allocation_size() const { return total_size_; }
unsigned allocation_count() const { return allocation_count_; }
unsigned id() const { return id_; }
const std::vector<AllocationTraceNode*>& children() const {
return children_;
}
void Print(int indent, AllocationTracker* tracker);
private:
AllocationTraceTree* tree_;
unsigned function_info_index_;
unsigned total_size_;
unsigned allocation_count_;
unsigned id_;
std::vector<AllocationTraceNode*> children_;
DISALLOW_COPY_AND_ASSIGN(AllocationTraceNode);
};
class AllocationTraceTree {
public:
AllocationTraceTree();
~AllocationTraceTree();
AllocationTraceNode* AddPathFromEnd(const Vector<unsigned>& 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 AddressToTraceMap {
public:
void AddRange(Address addr, int size, unsigned node_id);
unsigned GetTraceNodeId(Address addr);
void MoveObject(Address from, Address to, int size);
void Clear();
size_t size() { return ranges_.size(); }
void Print();
private:
struct RangeStack {
RangeStack(Address start, unsigned node_id)
: start(start), trace_node_id(node_id) {}
Address start;
unsigned trace_node_id;
};
// [start, end) -> trace
typedef std::map<Address, RangeStack> RangeMap;
void RemoveRange(Address start, Address end);
RangeMap ranges_;
};
class AllocationTracker {
public:
struct FunctionInfo {
FunctionInfo();
const char* name;
SnapshotObjectId function_id;
const char* script_name;
int script_id;
int line;
int column;
};
AllocationTracker(HeapObjectsMap* ids, StringsStorage* names);
~AllocationTracker();
void PrepareForSerialization();
void AllocationEvent(Address addr, int size);
AllocationTraceTree* trace_tree() { return &trace_tree_; }
const std::vector<FunctionInfo*>& function_info_list() const {
return function_info_list_;
}
AddressToTraceMap* address_to_trace() { return &address_to_trace_; }
private:
unsigned AddFunctionInfo(SharedFunctionInfo* info, SnapshotObjectId id);
unsigned functionInfoIndexForVMState(StateTag state);
class UnresolvedLocation {
public:
UnresolvedLocation(Script* script, int start, FunctionInfo* info);
~UnresolvedLocation();
void Resolve();
private:
static void HandleWeakScript(const v8::WeakCallbackInfo<void>& data);
Handle<Script> script_;
int start_position_;
FunctionInfo* info_;
};
static const int kMaxAllocationTraceLength = 64;
HeapObjectsMap* ids_;
StringsStorage* names_;
AllocationTraceTree trace_tree_;
unsigned allocation_trace_buffer_[kMaxAllocationTraceLength];
std::vector<FunctionInfo*> function_info_list_;
base::HashMap id_to_function_info_index_;
std::vector<UnresolvedLocation*> unresolved_locations_;
unsigned info_index_for_other_state_;
AddressToTraceMap address_to_trace_;
DISALLOW_COPY_AND_ASSIGN(AllocationTracker);
};
} // namespace internal
} // namespace v8
#endif // V8_PROFILER_ALLOCATION_TRACKER_H_
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