1 /*

     2  * Copyright 1997-2003 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any 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 

    35 class BytecodeClosure;

    36 class 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 

    52 class 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