jdk8-mips64-public/hotspot: src/share/vm/ci/ciExceptionHandler.hpp@a61af66fc99e

     1 /*

     2  * Copyright 1999-2005 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  */

    25 // ciExceptionHandler

    26 //

    27 // This class represents an exception handler for a method.

    28 class ciExceptionHandler : public ResourceObj {

    29 private:

    30   friend class ciMethod;

    32   // The loader to be used for resolving the exception

    33   // klass.

    34   ciInstanceKlass* _loading_klass;

    36   // Handler data.

    37   int _start;

    38   int _limit;

    39   int _handler_bci;

    40   int _catch_klass_index;

    42   // The exception klass that this handler catches.

    43   ciInstanceKlass* _catch_klass;

    45 public:

    46   ciExceptionHandler(ciInstanceKlass* loading_klass,

    47                      int start, int limit,

    48                      int handler_bci, int klass_index) {

    49     _loading_klass = loading_klass;

    50     _start  = start;

    51     _limit  = limit;

    52     _handler_bci = handler_bci;

    53     _catch_klass_index = klass_index;

    54     _catch_klass = NULL;

    55   }

    57   int       start()             { return _start; }

    58   int       limit()             { return _limit; }

    59   int       handler_bci()       { return _handler_bci; }

    60   int       catch_klass_index() { return _catch_klass_index; }

    62   // Get the exception klass that this handler catches.

    63   ciInstanceKlass* catch_klass();

    65   bool      is_catch_all() { return catch_klass_index() == 0; }

    66   bool      is_in_range(int bci) {

    67     return start() <= bci && bci < limit();

    68   }

    69   bool      catches(ciInstanceKlass *exc) {

    70     return is_catch_all() || exc->is_subtype_of(catch_klass());

    71   }

    72   bool      is_rethrow() { return handler_bci() == -1; }

    74   void      print();

    75 };

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