[turbofan] basic block profiler

src/compiler/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_COMPILER_BASIC_BLOCK_PROFILER_H_
+#define V8_COMPILER_BASIC_BLOCK_PROFILER_H_
+
+#include <list>
+
+#include "src/v8.h"
+
+namespace v8 {
+namespace internal {
+
+class CompilationInfo;
+
+namespace compiler {
+
+class Schedule;
+class Graph;
+
+class BasicBlockProfiler {
+ public:
+  class Data {
+   public:
+    void SetCode(Handle<Code> code);
+
+   private:
+    friend class BasicBlockProfiler;
+
+    Data(int n_blocks, int* block_ids, uint32_t* counts,
+         OStringStream* function_name, OStringStream* schedule_stream);
+    ~Data();
+
+    void DumpProfilingData();
+    void ResetCounts();
+
+    const int n_blocks_;
+    int* const block_ids_;
+    uint32_t* const counts_;
+    OStringStream* const function_name_;
+    OStringStream* const schedule_stream_;
+    OStringStream* code_stream_;
+    DISALLOW_COPY_AND_ASSIGN(Data);
+  };
+
+  BasicBlockProfiler();
+  ~BasicBlockProfiler();
+
+  Data* Profile(CompilationInfo* info, Graph* graph, Schedule* schedule);

[titzer, 2014/09/23 14:14:09]

I think "Instrument" is a better name here.

+
+  void DumpProfilingData();
+  void ResetCounts();
+
+ private:
+  void TearDown();
+
+  typedef std::list<Data*> DataList;
+  DataList data_list_;
+
+  DISALLOW_COPY_AND_ASSIGN(BasicBlockProfiler);
+};
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_COMPILER_BASIC_BLOCK_PROFILER_H_