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, 2003, 2004, 2005
   4    Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  21 Boston, MA 02110-1301, USA.
  22
  23 Java and all Java-based marks are trademarks or registered trademarks
  24 of Sun Microsystems, Inc. in the United States and other countries.
  25 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  26
  27 struct eh_range
  28   {
  29     /* The (byte-code PC) range of the handled block. */
  30     int start_pc;
  31     int end_pc;
  32
  33     /* A list of handlers.  For each element in the list,
  34        the TREE_PURPOSE is the handled class (NULL_EXPR for a finally block),
  35        and the TREE_VALUE is the LABEL_DECL of the handler. */
  36     tree handlers;
  37
  38     /* Surrounding handler, if any. */
  39     struct eh_range *outer;
  40
  41     /* The first child range.  It is is nested inside this range
  42        (i.e. this.start_pc <= first_child.end_pc
  43        && this.end_pc >= first_child.end_pc).
  44        The children are linked together using next_sibling, and are sorted
  45        by increasing start_pc and end_pc (we do not support non-nested
  46        overlapping ranges). */
  47     struct eh_range *first_child;
  48
  49     /* The next child of outer, in address order. */
  50     struct eh_range *next_sibling;
  51
  52     /* True if this range has already been expanded. */
  53     int expanded;
  54
  55     /* The TRY_CATCH_EXPR for this EH range.  */
  56     tree stmt;
  57   };
  58
  59 /* A dummy range that represents the entire method. */
  60 extern struct eh_range whole_range;
  61
  62 #define NULL_EH_RANGE (&whole_range)
  63
  64 extern struct eh_range * find_handler (int);
  65 extern void method_init_exceptions (void);
  66 extern void maybe_start_try (int, int);
  67 extern void add_handler (int, int, tree, tree);
  68 extern void expand_end_java_handler (struct eh_range *);
  69 extern bool sanity_check_exception_range (struct eh_range *);