Skip samples where top function's stack frame is not setup properly

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 00074c899b4d06dc58f6bb2adc52d01515fe660c..cef068f723f471fc80496629d38a38f7a9515754 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -47,6 +47,12 @@ enum ParseRestriction {
   ONLY_SINGLE_FUNCTION_LITERAL  // Only a single FunctionLiteral expression.
 };
 
+struct OffsetRange {
+  OffsetRange(int from, int to) : from(from), to(to) {}
+  int from;
+  int to;
+};
+
 // CompilationInfo encapsulates some information known at compile time.  It
 // is constructed based on the resources available at compile-time.
 class CompilationInfo {
@@ -257,6 +263,20 @@ class CompilationInfo {
     prologue_offset_ = prologue_offset;
   }
 
+  // Adds offset range [from, to) where fp register does not point
+  // to the current frame base. Used in CPU profiler to detect stack
+  // samples where top frame is not setup.

[Jakob Kummerow, 2013/05/14 12:38:51]

nit: s/setup/set up/

[yurys, 2013/05/14 22:51:19]

Done.

+  inline void AddNoFrameRange(int from, int to) {
+    if (no_frame_ranges_) no_frame_ranges_->Add(OffsetRange(from, to));
+  }
+
+  List<OffsetRange>* ReleaseNoFrameRanges() {
+    List<OffsetRange>* result = no_frame_ranges_;
+    no_frame_ranges_ = NULL;
+    return result;
+  }
+
+
  private:
   Isolate* isolate_;
 
@@ -361,6 +381,8 @@ class CompilationInfo {
 
   int prologue_offset_;
 
+  List<OffsetRange>* no_frame_ranges_;
+
   // A copy of shared_info()->opt_count() to avoid handle deref
   // during graph optimization.
   int opt_count_;