CpuProfiler: public API for deopt info in cpu profiler.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index f6398aedf5ea50100398db2b73a20edb5984c9b8..aeef7ba4bf2cb9f95eb57d674b5e9430d65f6604 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -7512,6 +7512,44 @@ const CpuProfileNode* CpuProfileNode::GetChild(int index) const {
 }
 
 
+unsigned CpuProfileNode::GetDeoptCount() const {
+  const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
+  return static_cast<unsigned>(node->deopt_infos().size());
+}
+
+
+const CpuProfileDeoptInfo* CpuProfileNode::GetDeoptInfo(unsigned index) const {
+  const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
+  DCHECK_LT(index, node->deopt_infos().size());
+  if (index >= node->deopt_infos().size()) return NULL;
+  const i::DeoptInfo& deopt_info = node->deopt_infos().at(index);
+  return reinterpret_cast<const CpuProfileDeoptInfo*>(&deopt_info);
+}
+
+
+const char* CpuProfileDeoptInfo::GetDeoptReason() const {
+  const i::DeoptInfo* deopt_info = reinterpret_cast<const i::DeoptInfo*>(this);
+  return deopt_info->deopt_reason;
+}
+
+
+unsigned CpuProfileDeoptInfo::GetFramesCount() const {
+  const i::DeoptInfo* deopt_info = reinterpret_cast<const i::DeoptInfo*>(this);
+  return static_cast<unsigned>(deopt_info->stack.size());
+}
+
+
+bool CpuProfileDeoptInfo::GetCallFrames(Frame* frames,
+                                        unsigned int length) const {
+  if (frames == NULL || length == 0) return false;
+  const i::DeoptInfo* deopt_info = reinterpret_cast<const i::DeoptInfo*>(this);
+  for (size_t i = 0; i < deopt_info->stack.size() && i < length; ++i) {
+    frames[i] = deopt_info->stack[i];
+  }
+  return true;
+}
+
+
 void CpuProfile::Delete() {
   i::Isolate* isolate = i::Isolate::Current();
   i::CpuProfiler* profiler = isolate->cpu_profiler();