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Java example source code file (bytecodeTracer.hpp)

This example Java source code file (bytecodeTracer.hpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

allstatic, bytecodeclosure, bytecodetracer, product, share_vm_interpreter_bytecodetracer_hpp

The bytecodeTracer.hpp Java example source code

/*
 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#ifndef SHARE_VM_INTERPRETER_BYTECODETRACER_HPP
#define SHARE_VM_INTERPRETER_BYTECODETRACER_HPP

#include "memory/allocation.hpp"

// The BytecodeTracer is a helper class used by the interpreter for run-time
// bytecode tracing. If bytecode tracing is turned on, trace() will be called
// for each bytecode.
//
// By specialising the BytecodeClosure, all kinds of bytecode traces can
// be done.

#ifndef PRODUCT
// class BytecodeTracer is only used by TraceBytecodes option

class BytecodeClosure;
class BytecodeTracer: AllStatic {
 private:
  static BytecodeClosure* _closure;

 public:
  static BytecodeClosure* std_closure();                        // a printing closure
  static BytecodeClosure* closure()                                                   { return _closure; }
  static void             set_closure(BytecodeClosure* closure) { _closure = closure; }

  static void             trace(methodHandle method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st = tty);
  static void             trace(methodHandle method, address bcp, outputStream* st = tty);
};


// For each bytecode, a BytecodeClosure's trace() routine will be called.

class BytecodeClosure {
 public:
  virtual void trace(methodHandle method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) = 0;
  virtual void trace(methodHandle method, address bcp, outputStream* st) = 0;
};

#endif // !PRODUCT

#endif // SHARE_VM_INTERPRETER_BYTECODETRACER_HPP

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