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1 /*
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2 * Copyright 1999-2005 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 // ciExceptionHandler
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26 //
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27 // This class represents an exception handler for a method.
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28 class ciExceptionHandler : public ResourceObj {
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29 private:
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30 friend class ciMethod;
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31
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32 // The loader to be used for resolving the exception
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33 // klass.
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34 ciInstanceKlass* _loading_klass;
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35
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36 // Handler data.
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37 int _start;
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38 int _limit;
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39 int _handler_bci;
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40 int _catch_klass_index;
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41
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42 // The exception klass that this handler catches.
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43 ciInstanceKlass* _catch_klass;
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44
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45 public:
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46 ciExceptionHandler(ciInstanceKlass* loading_klass,
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47 int start, int limit,
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48 int handler_bci, int klass_index) {
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49 _loading_klass = loading_klass;
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50 _start = start;
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51 _limit = limit;
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52 _handler_bci = handler_bci;
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53 _catch_klass_index = klass_index;
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54 _catch_klass = NULL;
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55 }
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56
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57 int start() { return _start; }
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58 int limit() { return _limit; }
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59 int handler_bci() { return _handler_bci; }
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60 int catch_klass_index() { return _catch_klass_index; }
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61
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62 // Get the exception klass that this handler catches.
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63 ciInstanceKlass* catch_klass();
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64
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65 bool is_catch_all() { return catch_klass_index() == 0; }
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66 bool is_in_range(int bci) {
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67 return start() <= bci && bci < limit();
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68 }
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69 bool catches(ciInstanceKlass *exc) {
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70 return is_catch_all() || exc->is_subtype_of(catch_klass());
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71 }
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72 bool is_rethrow() { return handler_bci() == -1; }
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73
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74 void print();
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75 };
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