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+// Copyright 2007-2008 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
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef V8_DISASM_H_
+#define V8_DISASM_H_
+
+namespace disasm {
+
+typedef unsigned char byte;
+
+// Interface and default implementation for converting addresses and
+// register-numbers to text.  The default implementation is machine
+// specific.
+class NameConverter {
+ public:
+  virtual ~NameConverter() {}
+  virtual const char* NameOfCPURegister(int reg) const;
+  virtual const char* NameOfByteCPURegister(int reg) const;
+  virtual const char* NameOfXMMRegister(int reg) const;
+  virtual const char* NameOfAddress(byte* addr) const;
+  virtual const char* NameOfConstant(byte* addr) const;
+  virtual const char* NameInCode(byte* addr) const;
+
+ protected:
+  v8::internal::EmbeddedVector<char, 128> tmp_buffer_;
+};
+
+
+// A generic Disassembler interface
+class Disassembler {
+ public:
+  // Caller deallocates converter.
+  explicit Disassembler(const NameConverter& converter);
+
+  virtual ~Disassembler();
+
+  // Writes one disassembled instruction into 'buffer' (0-terminated).
+  // Returns the length of the disassembled machine instruction in bytes.
+  int InstructionDecode(v8::internal::Vector<char> buffer, byte* instruction);
+
+  // Returns -1 if instruction does not mark the beginning of a constant pool,
+  // or the number of entries in the constant pool beginning here.
+  int ConstantPoolSizeAt(byte* instruction);
+
+  // Write disassembly into specified file 'f' using specified NameConverter
+  // (see constructor).
+  static void Disassemble(FILE* f, byte* begin, byte* end);
+ private:
+  const NameConverter& converter_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(Disassembler);
+};
+
+}  // namespace disasm
+
+#endif  // V8_DISASM_H_