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1 /*
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2 * Copyright 1997-2003 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // The BytecodeTracer is a helper class used by the interpreter for run-time
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26 // bytecode tracing. If bytecode tracing is turned on, trace() will be called
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27 // for each bytecode.
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28 //
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29 // By specialising the BytecodeClosure, all kinds of bytecode traces can
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30 // be done.
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31
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32 #ifndef PRODUCT
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33 // class BytecodeTracer is only used by TraceBytecodes option
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34
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35 class BytecodeClosure;
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36 class BytecodeTracer: AllStatic {
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37 private:
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38 static BytecodeClosure* _closure;
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39
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40 public:
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41 static BytecodeClosure* std_closure(); // a printing closure
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42 static BytecodeClosure* closure() { return _closure; }
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43 static void set_closure(BytecodeClosure* closure) { _closure = closure; }
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44
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45 static void trace(methodHandle method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st = tty);
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46 static void trace(methodHandle method, address bcp, outputStream* st = tty);
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47 };
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48
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49
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50 // For each bytecode, a BytecodeClosure's trace() routine will be called.
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51
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52 class BytecodeClosure {
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53 public:
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54 virtual void trace(methodHandle method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) = 0;
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55 virtual void trace(methodHandle method, address bcp, outputStream* st) = 0;
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56 };
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57
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58 #endif // !PRODUCT
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