bytecodeTracer.hpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25// The BytecodeTracer is a helper class used by the interpreter for run-time 26// bytecode tracing. If bytecode tracing is turned on, trace() will be called 27// for each bytecode. 28// 29// By specialising the BytecodeClosure, all kinds of bytecode traces can 30// be done. 31 32#ifndef PRODUCT 33// class BytecodeTracer is only used by TraceBytecodes option 34 35class BytecodeClosure; 36class BytecodeTracer: AllStatic { 37 private: 38 static BytecodeClosure* _closure; 39 40 public: 41 static BytecodeClosure* std_closure(); // a printing closure 42 static BytecodeClosure* closure() { return _closure; } 43 static void set_closure(BytecodeClosure* closure) { _closure = closure; } 44 45 static void trace(methodHandle method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st = tty); 46 static void trace(methodHandle method, address bcp, outputStream* st = tty); 47}; 48 49 50// For each bytecode, a BytecodeClosure's trace() routine will be called. 51 52class BytecodeClosure { 53 public: 54 virtual void trace(methodHandle method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) = 0; 55 virtual void trace(methodHandle method, address bcp, outputStream* st) = 0; 56}; 57 58#endif // !PRODUCT 59