gcc/java/java-except.h

   1 /* Definitions for exception handling for use by the GNU compiler
   2    for the Java(TM) language compiler.
   3    Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.
  21
  22 Java and all Java-based marks are trademarks or registered trademarks
  23 of Sun Microsystems, Inc. in the United States and other countries.
  24 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  25
  26 struct eh_range
  27   {
  28     /* The (byte-code PC) range of the handled block. */
  29     int start_pc;
  30     int end_pc;
  31
  32     /* A list of handlers.  For each element in the list,
  33        the TREE_PURPOSE is the handled class (NULL_EXPR for a finally block),
  34        and the TREE_VALUE is the LABEL_DECL of the handler. */
  35     tree handlers;
  36
  37     /* Surrunding handler, if any. */
  38     struct eh_range *outer;
  39
  40     /* The first child range.  It is is nested inside this range
  41        (i.e. this.start_pc <= first_child.end_pc
  42        && this.end_pc >= first_child.end_pc).
  43        The children are linked together using next_sibling, and are sorted
  44        by increasing start_pc and end_pc (we do not support non-nested
  45        overlapping ranges). */
  46     struct eh_range *first_child;
  47
  48     /* The next child of outer, in address order. */
  49     struct eh_range *next_sibling;
  50
  51     /* True if this range has already been expanded. */
  52     int expanded;
  53   };
  54
  55 /* A dummy range that represents the entire method. */
  56 extern struct eh_range whole_range;
  57
  58 #define NULL_EH_RANGE (&whole_range)
  59
  60 extern struct eh_range * find_handler PARAMS ((int));
  61
  62 extern void method_init_exceptions PARAMS ((void));
  63
  64 extern void emit_handlers PARAMS ((void));
  65
  66 extern void maybe_start_try PARAMS ((int, int));
  67
  68 extern void maybe_end_try PARAMS ((int, int));
  69
  70 extern void add_handler PARAMS ((int, int, tree, tree));
  71
  72 extern void handle_nested_ranges PARAMS ((void));
  73
  74 extern void expand_resume_after_catch PARAMS ((void));