Visit stored context when iterating stack for optimized stub.

src/frames.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 648 matching lines @@
   for (unsigned index = 0; index < stack_slots; index++) {
     int byte_index = index >> kBitsPerByteLog2;
     int bit_index = index & (kBitsPerByte - 1);
     if ((safepoint_bits[byte_index] & (1U << bit_index)) != 0) {
       v->VisitPointer(parameters_limit + index);
     }
   }
 
   // Visit the return address in the callee and incoming arguments.
   IteratePc(v, pc_address(), code);
+
+  // Visit the context in stub frame and JavaScript frame.
+  // Visit the function in JavaScript frame.
+  Object** fixed_base = &Memory::Object_at(
+      fp() + StandardFrameConstants::kMarkerOffset);
+  Object** fixed_limit = &Memory::Object_at(fp());
+  v->VisitPointers(fixed_base, fixed_limit);
 }
 
 
 void StubFrame::Iterate(ObjectVisitor* v) const {
   IterateCompiledFrame(v);
 }
 
 
 Code* StubFrame::unchecked_code() const {
   return static_cast<Code*>(isolate()->heap()->FindCodeObject(pc()));
@@ skipping 11 matching lines @@
 
 
 void OptimizedFrame::Iterate(ObjectVisitor* v) const {
 #ifdef DEBUG
   // Make sure that optimized frames do not contain any stack handlers.
   StackHandlerIterator it(this, top_handler());
   ASSERT(it.done());
 #endif
 
   IterateCompiledFrame(v);
-
-  // Visit the context and the function.
-  Object** fixed_base = &Memory::Object_at(
-      fp() + JavaScriptFrameConstants::kFunctionOffset);
-  Object** fixed_limit = &Memory::Object_at(fp());
-  v->VisitPointers(fixed_base, fixed_limit);
 }
 
 
 void JavaScriptFrame::SetParameterValue(int index, Object* value) const {
   Memory::Object_at(GetParameterSlot(index)) = value;
 }
 
 
 bool JavaScriptFrame::IsConstructor() const {
   Address fp = caller_fp();
@@ skipping 776 matching lines @@
   ZoneList<StackFrame*> list(10, zone);
   for (StackFrameIterator it(isolate); !it.done(); it.Advance()) {
     StackFrame* frame = AllocateFrameCopy(it.frame(), zone);
     list.Add(frame, zone);
   }
   return list.ToVector();
 }
 
 
 } }  // namespace v8::internal