Support pass-through of stub caller arguments

src/frames.cc

Index: src/frames.cc
diff --git a/src/frames.cc b/src/frames.cc
index 98b3d65f955ed9eac36b52fc1f4dc365447bbfa7..0e52e4afaba8777ad31a49f795e3663519728989 100644
--- a/src/frames.cc
+++ b/src/frames.cc
@@ -1304,9 +1304,14 @@ void InternalFrame::Iterate(ObjectVisitor* v) const {
 
 
 void StubFailureTrampolineFrame::Iterate(ObjectVisitor* v) const {
-  const int offset = StandardFrameConstants::kContextOffset;
   Object** base = &Memory::Object_at(sp());
-  Object** limit = &Memory::Object_at(fp() + offset) + 1;
+  // sizeof(Arguments) - sizeof(Arguments*) is 3 * kPointerSize), but the
+  // presubmit script complains about using sizeof() on a type.
+  Object** limit = &Memory::Object_at(
+      fp() + StandardFrameConstants::kMarkerOffset - 3 * kPointerSize);

[mvstanton, 2013/02/04 08:54:26]

A StubFailureTrampolineFrameConstant would be a nice aid for this expression.

[danno, 2013/02/04 10:22:24]

Done.

+  v->VisitPointers(base, limit);
+  limit = &Memory::Object_at(fp());
+  base = &Memory::Object_at(fp() + StandardFrameConstants::kMarkerOffset);
   v->VisitPointers(base, limit);
   IteratePc(v, pc_address(), LookupCode());
 }