Revision: 18968
Author: [email protected]
Date: Fri Jan 31 00:49:07 2014 UTC
Log: MIPS: Fix the context check in LoadGlobalFunctionPrototype
Port r18958 (5cd635d0)
BUG=
[email protected]
Review URL: https://codereview.chromium.org/132883017
http://code.google.com/p/v8/source/detail?r=18968
Modified:
/branches/bleeding_edge/src/mips/stub-cache-mips.cc
=======================================
--- /branches/bleeding_edge/src/mips/stub-cache-mips.cc Fri Jan 31 00:36:19
2014 UTC
+++ /branches/bleeding_edge/src/mips/stub-cache-mips.cc Fri Jan 31 00:49:07
2014 UTC
@@ -287,15 +287,19 @@
Register prototype,
Label* miss) {
Isolate* isolate = masm->isolate();
- // Check we're still in the same context.
- __ lw(prototype,
- MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX)));
- ASSERT(!prototype.is(at));
- __ li(at, isolate->global_object());
- __ Branch(miss, ne, prototype, Operand(at));
// Get the global function with the given index.
Handle<JSFunction> function(
JSFunction::cast(isolate->native_context()->get(index)));
+
+ // Check we're still in the same context.
+ Register scratch = prototype;
+ const int offset = Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX);
+ __ lw(scratch, MemOperand(cp, offset));
+ __ lw(scratch, FieldMemOperand(scratch,
GlobalObject::kNativeContextOffset));
+ __ lw(scratch, MemOperand(scratch, Context::SlotOffset(index)));
+ __ li(at, function);
+ __ Branch(miss, ne, at, Operand(scratch));
+
// Load its initial map. The global functions all have initial maps.
__ li(prototype, Handle<Map>(function->initial_map()));
// Load the prototype from the initial map.
--
--
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