1 /* 2 * Copyright (c) 1997, 2010, 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 #ifndef SHARE_VM_INTERPRETER_BYTECODETRACER_HPP 26 #define SHARE_VM_INTERPRETER_BYTECODETRACER_HPP 27 28 #include "memory/allocation.hpp" 29 30 // The BytecodeTracer is a helper class used by the interpreter for run-time 31 // bytecode tracing. If bytecode tracing is turned on, trace() will be called 32 // for each bytecode. 33 // 34 // By specialising the BytecodeClosure, all kinds of bytecode traces can 35 // be done. 36 37 // class BytecodeTracer is used by TraceBytecodes option and PrintMethodData 38 39 class BytecodeClosure; 40 class BytecodeTracer: AllStatic { 41 private: 42 static BytecodeClosure* _closure; 43 44 public: 45 static BytecodeClosure* std_closure(); // a printing closure 46 static BytecodeClosure* closure() { return _closure; } 47 static void set_closure(BytecodeClosure* closure) { _closure = closure; } 48 49 static void trace(methodHandle method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st = tty); 50 static void trace(methodHandle method, address bcp, outputStream* st = tty); 51 }; 52 53 54 // For each bytecode, a BytecodeClosure's trace() routine will be called. 55 56 class BytecodeClosure { 57 public: 58 virtual void trace(methodHandle method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) = 0; 59 virtual void trace(methodHandle method, address bcp, outputStream* st) = 0; 60 }; 61 62 #endif // SHARE_VM_INTERPRETER_BYTECODETRACER_HPP