Extra code to diagnose a crash bug.

src/ic/ic.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_IC_H_
 #define V8_IC_H_
 
 #include "src/ic/ic-state.h"
 #include "src/macro-assembler.h"
 #include "src/messages.h"
@@ skipping 305 matching lines @@
       : IC(depth, isolate, nexus) {
     DCHECK(nexus != NULL);
     DCHECK(IsLoadStub());
   }
 
   bool ShouldThrowReferenceError(Handle<Object> receiver) {
     return receiver->IsGlobalObject() && typeof_mode() == NOT_INSIDE_TYPEOF;
   }
 
   // Code generator routines.
-  static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); }
-  static void GenerateMiss(MacroAssembler* masm);
+
+  // TODO(jkummerow): remove the stress parameter and these stress constants

[Jakob Kummerow, 2015/09/16 13:57:22]

nit: s/remove/Remove/, and the next two lines fit on one.

[mvstanton, 2015/09/16 14:55:41]

Done.

+  // when
+  // a crash bug is fixed.
+  static const int kStressNone = 0;
+  static const int kStressInit = 1;
+  static const int kStressDispatcher = 2;
+  static const int kStressBuiltin = 3;
+  static void GenerateInitialize(MacroAssembler* masm) {
+    GenerateMiss(masm, kStressInit);
+  }
+  static void GenerateMiss(MacroAssembler* masm, int stress = kStressNone);
   static void GenerateRuntimeGetProperty(MacroAssembler* masm,
                                          LanguageMode language_mode);
   static void GenerateNormal(MacroAssembler* masm, LanguageMode language_mode);
 
   static Handle<Code> initialize_stub(Isolate* isolate,
                                       ExtraICState extra_state);
   static Handle<Code> initialize_stub_in_optimized_code(
       Isolate* isolate, ExtraICState extra_state, State initialization_state);
 
   MUST_USE_RESULT MaybeHandle<Object> Load(Handle<Object> object,
@@ skipping 343 matching lines @@
 
 
 // Helper for BinaryOpIC and CompareIC.
 enum InlinedSmiCheck { ENABLE_INLINED_SMI_CHECK, DISABLE_INLINED_SMI_CHECK };
 void PatchInlinedSmiCode(Address address, InlinedSmiCheck check);
 
 }
 }  // namespace v8::internal
 
 #endif  // V8_IC_H_