Fix LookupCode for the DatePrototype_GetField builtin

src/frames-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_FRAMES_INL_H_
 #define V8_FRAMES_INL_H_
 
 #include "src/frames.h"
 #include "src/isolate.h"
 #include "src/objects-inl.h"
@@ skipping 45 matching lines @@
     : iterator_(iterator), isolate_(iterator_->isolate()) {
 }
 
 
 inline StackHandler* StackFrame::top_handler() const {
   return iterator_->handler();
 }
 
 
 inline Code* StackFrame::LookupCode() const {
+  // TODO(jgruber): This should really check that pc is within the returned
+  // code's instruction range [instruction_start(), instruction_end()[.
   return GetContainingCode(isolate(), pc());
 }
 
 
 inline Code* StackFrame::GetContainingCode(Isolate* isolate, Address pc) {
   return isolate->inner_pointer_to_code_cache()->GetCacheEntry(pc)->code;
 }
 
 
 inline Address* StackFrame::ResolveReturnAddressLocation(Address* pc_address) {
@@ skipping 247 matching lines @@
   DCHECK(frame_->is_java_script() || frame_->is_exit() ||
          frame_->is_builtin_exit());
   return frame_;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_FRAMES_INL_H_