Add support for forceful termination of JavaScript execution.

src/codegen.h

 // Copyright 2006-2008 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 52 matching lines @@
 //   PatchInlineRuntimeEntry
 //   CodeForFunctionPosition
 //   CodeForReturnPosition
 //   CodeForStatementPosition
 //   CodeForSourcePosition
 
 
 // Mode to overwrite BinaryExpression values.
 enum OverwriteMode { NO_OVERWRITE, OVERWRITE_LEFT, OVERWRITE_RIGHT };
 
+// Types of uncatchable exceptions.
+enum UncatchableExceptionType { OUT_OF_MEMORY, TERMINATION };
+
 
 #if V8_TARGET_ARCH_IA32
 #include "ia32/codegen-ia32.h"
 #elif V8_TARGET_ARCH_X64
 #include "x64/codegen-x64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "arm/codegen-arm.h"
 #else
 #error Unsupported target architecture.
 #endif
@@ skipping 201 matching lines @@
 class CEntryStub : public CodeStub {
  public:
   CEntryStub() { }
 
   void Generate(MacroAssembler* masm) { GenerateBody(masm, false); }
 
  protected:
   void GenerateBody(MacroAssembler* masm, bool is_debug_break);
   void GenerateCore(MacroAssembler* masm,
                     Label* throw_normal_exception,
+                    Label* throw_termination_exception,
                     Label* throw_out_of_memory_exception,
                     StackFrame::Type frame_type,
                     bool do_gc,
                     bool always_allocate_scope);
   void GenerateThrowTOS(MacroAssembler* masm);
-  void GenerateThrowOutOfMemory(MacroAssembler* masm);
+  void GenerateThrowUncatchable(MacroAssembler* masm,
+                                UncatchableExceptionType type);
 
  private:
   Major MajorKey() { return CEntry; }
   int MinorKey() { return 0; }
 
   const char* GetName() { return "CEntryStub"; }
 };
 
 
 class CEntryDebugBreakStub : public CEntryStub {
@@ skipping 67 matching lines @@
     PrintF("ArgumentsAccessStub (type %d)\n", type_);
   }
 #endif
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODEGEN_H_