Moving cpu profiling into its own thread.

src/platform.h

Index: src/platform.h
diff --git a/src/platform.h b/src/platform.h
index 14f4551f372e2c5faed9e9f8312ad1ab84a0c519..813e9d9f571adbc42e973a01f1e5fc5a9ce31a67 100644
--- a/src/platform.h
+++ b/src/platform.h
@@ -762,6 +762,20 @@ class Sampler {
   DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler);
 };
 
+class CpuProfilerThread : public Thread {
+ public:
+  static const int kCpuProfilerThreadStackSize = 64 * KB;
+
+  explicit CpuProfilerThread(Sampler* sampler);
+
+  virtual void Run() = 0;
+
+  void DoCpuProfile();
+
+ private:
+  const int vm_tgid_;

[caseq, 2012/08/16 14:39:22]

That's a platform specific field, it should be in the implementation.

+  Sampler* sampler_;
+};
 
 } }  // namespace v8::internal