Fix isolate bug introduced by generated code stubs

src/code-stubs-hydrogen.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 60 matching lines @@
     PrintF("Compiling stub using hydrogen\n");
     HTracer::Instance()->TraceCompilation(&info_);
   }
   HBasicBlock* next_block = graph()->CreateBasicBlock();
   next_block->SetInitialEnvironment(graph()->start_environment());
   HGoto* jump = new(zone()) HGoto(next_block);
   graph()->entry_block()->Finish(jump);
   set_current_block(next_block);
 
   int major_key = stub()->MajorKey();
-  CodeStubInterfaceDescriptor** descriptors =
-      info_.isolate()->code_stub_interface_descriptors();
-  if (descriptors[major_key] == NULL) {
-    descriptors[major_key] = stub()->GetInterfaceDescriptor(info_.isolate());
+  CodeStubInterfaceDescriptor* descriptor =
+      info_.isolate()->code_stub_interface_descriptor(major_key);
+  if (descriptor->register_param_count_ < 0) {
+    stub()->InitializeInterfaceDescriptor(info_.isolate(),
+                                          descriptor);

[Jakob Kummerow, 2012/12/05 16:14:33]

nit: fits on one line?

[danno, 2012/12/05 16:16:51]

Done.

   }
-
-  CodeStubInterfaceDescriptor* descriptor = descriptors[major_key];
-  parameters_.Reset(new HParameter*[descriptor->number_of_register_params]);
+  parameters_.Reset(new HParameter*[descriptor->register_param_count_]);
 
   HGraph* graph = this->graph();
   Zone* zone = this->zone();
-  for (int i = 0; i < descriptor->number_of_register_params; ++i) {
+  for (int i = 0; i < descriptor->register_param_count_; ++i) {
     HParameter* param = new(zone) HParameter(i);
     AddInstruction(param);
     graph->start_environment()->Push(param);
     parameters_[i] = param;
   }
   AddSimulate(BailoutId::StubEntry());
 
   BuildCodeStub();
 
   return true;
@@ skipping 25 matching lines @@
 }
 
 
 Handle<Code> KeyedLoadFastElementStub::GenerateCode() {
   CodeStubGraphBuilder<KeyedLoadFastElementStub> builder(this);
   return CodeFromGraph(builder.CreateGraph());
 }
 
 
 } }  // namespace v8::internal