[turbofan] basic block profiler

src/basic-block-profiler.h

+// Copyright 2014 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_BASIC_BLOCK_PROFILER_H_
+#define V8_BASIC_BLOCK_PROFILER_H_
+
+#include <list>
+
+#include "src/v8.h"
+
+namespace v8 {
+namespace internal {
+
+class Schedule;
+class Graph;
+
+class BasicBlockProfiler {
+ public:
+  class Data {
+   public:
+    size_t n_blocks() const { return n_blocks_; }
+    const uint32_t* counts() const { return &counts_[0]; }
+
+    void SetCode(OStringStream* os);
+    void SetFunctionName(OStringStream* os);
+    void SetSchedule(OStringStream* os);
+    void SetBlockId(size_t offset, int block_id);
+    uint32_t* GetCounterAddress(size_t offset);
+
+   private:
+    friend class BasicBlockProfiler;
+    friend OStream& operator<<(OStream& os, const BasicBlockProfiler::Data& s);
+
+    explicit Data(size_t n_blocks);
+    ~Data();
+
+    void ResetCounts();
+
+    const size_t n_blocks_;
+    std::vector<int> block_ids_;
+    std::vector<uint32_t> counts_;
+    std::string function_name_;
+    std::string schedule_;
+    std::string code_;
+    DISALLOW_COPY_AND_ASSIGN(Data);
+  };
+
+  typedef std::list<Data*> DataList;
+
+  BasicBlockProfiler();
+  ~BasicBlockProfiler();
+
+  Data* NewData(size_t n_blocks);
+  void ResetCounts();
+
+  const DataList* data_list() { return &data_list_; }
+
+ private:
+  friend OStream& operator<<(OStream& os, const BasicBlockProfiler& s);
+
+  DataList data_list_;
+
+  DISALLOW_COPY_AND_ASSIGN(BasicBlockProfiler);
+};
+
+OStream& operator<<(OStream& os, const BasicBlockProfiler& s);
+OStream& operator<<(OStream& os, const BasicBlockProfiler::Data& s);
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_BASIC_BLOCK_PROFILER_H_