Make Isolate::GetStackSample API support simulator

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 47fc1ce1b2f62ba22dd739aeba225c14da1b9230..90f8ccabf150425eec1b6d70ed46501e49ad7b80 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -7522,8 +7522,18 @@ bool Isolate::GetHeapObjectStatisticsAtLastGC(
 void Isolate::GetStackSample(const RegisterState& state, void** frames,
                              size_t frames_limit, SampleInfo* sample_info) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
+#if defined(USE_SIMULATOR)
+  RegisterState regs;
+  regs.pc = state.pc;
+  regs.sp = state.sp;
+  regs.fp = state.fp;
+  i::SimulatorHelper::FillRegisters(isolate, &regs);
+  i::TickSample::GetStackSample(isolate, regs, i::TickSample::kSkipCEntryFrame,
+                                frames, frames_limit, sample_info);
+#else
   i::TickSample::GetStackSample(isolate, state, i::TickSample::kSkipCEntryFrame,

[alph, 2016/04/29 20:59:57]

You don't have to copy this line twice. Just make:

#else
  const RegisterState& regs = state;
#endif
  i::TickSample::GetStackSample...

[lpy, 2016/04/29 21:43:10]

Done.

                                 frames, frames_limit, sample_info);
+#endif
 }