Enable weak embedded maps in optimized code.

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index 6c797b252280a75680aa1f1c0f23cf58557d9f7e..68c8fe6844ab62ee195280fa51d9af2a0913c3c9 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -721,6 +721,17 @@ void Isolate::CaptureAndSetDetailedStackTrace(Handle<JSObject> error_object) {
 }
 
 
+StackFrame* Isolate::TopOptimizedFrame() {
+  for (StackFrameIterator it(this, thread_local_top());
+       !it.done(); it.Advance()) {
+    if (it.frame()->type() == StackFrame::OPTIMIZED) {

[Michael Starzinger, 2013/07/02 14:20:54]

Shouldn't this actually just look whether the top-most frame is an optimized one
instead of searching for the first optimized frame?

As discussed offline: I am also fine with breaking the search at the first
encounter of a non-optimized frame.

[ulan, 2013/07/02 14:45:41]

Added a check for non-optimized frame.

On 2013/07/02 14:20:54, Michael Starzinger wrote:

+      return it.frame();
+    }
+  }
+  return NULL;
+}
+
+
 Handle<JSArray> Isolate::CaptureCurrentStackTrace(
     int frame_limit, StackTrace::StackTraceOptions options) {
   // Ensure no negative values.