Enable weak embedded maps in optimized code.

src/isolate.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 703 matching lines @@
     // Capture stack trace for a detailed exception message.
     Handle<String> key = factory()->hidden_stack_trace_string();
     Handle<JSArray> stack_trace = CaptureCurrentStackTrace(
         stack_trace_for_uncaught_exceptions_frame_limit_,
         stack_trace_for_uncaught_exceptions_options_);
     JSObject::SetHiddenProperty(error_object, key, stack_trace);
   }
 }
 
 
+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.
   int limit = Max(frame_limit, 0);
   Handle<JSArray> stack_trace = factory()->NewJSArray(frame_limit);
 
   Handle<String> column_key =
       factory()->InternalizeOneByteString(STATIC_ASCII_VECTOR("column"));
   Handle<String> line_key =
       factory()->InternalizeOneByteString(STATIC_ASCII_VECTOR("lineNumber"));
@@ skipping 1737 matching lines @@
 
 #ifdef DEBUG
 #define ISOLATE_FIELD_OFFSET(type, name, ignored)                       \
 const intptr_t Isolate::name##_debug_offset_ = OFFSET_OF(Isolate, name##_);
 ISOLATE_INIT_LIST(ISOLATE_FIELD_OFFSET)
 ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET)
 #undef ISOLATE_FIELD_OFFSET
 #endif
 
 } }  // namespace v8::internal