1 /* 2 * Copyright (c) 1997, 2019, 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_INTERPRETER_BYTECODETRACER_HPP 26 #define SHARE_INTERPRETER_BYTECODETRACER_HPP 27 28 #include "memory/allocation.hpp" 29 #include "utilities/ostream.hpp" 30 31 // The BytecodeTracer is a helper class used by the interpreter for run-time 32 // bytecode tracing. If bytecode tracing is turned on, trace() will be called 33 // for each bytecode. 34 // 35 // By specialising the BytecodeClosure, all kinds of bytecode traces can 36 // be done. 37 38 // class BytecodeTracer is used by TraceBytecodes option and PrintMethodData 39 40 class methodHandle; 41 42 class BytecodeClosure; 43 class BytecodeTracer: AllStatic { 44 private: 45 static BytecodeClosure* _closure; 46 47 public: 48 static BytecodeClosure* std_closure(); // a printing closure closure()49 static BytecodeClosure* closure() { return _closure; } set_closure(BytecodeClosure * closure)50 static void set_closure(BytecodeClosure* closure) { _closure = closure; } 51 52 static void trace(const methodHandle& method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st = tty); 53 static void trace(const methodHandle& method, address bcp, outputStream* st = tty); 54 }; 55 56 57 // For each bytecode, a BytecodeClosure's trace() routine will be called. 58 59 class BytecodeClosure { 60 public: 61 virtual void trace(const methodHandle& method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) = 0; 62 virtual void trace(const methodHandle& method, address bcp, outputStream* st) = 0; 63 }; 64 65 #endif // SHARE_INTERPRETER_BYTECODETRACER_HPP 66