debug/tst-backtrace.h

   1 /* Test backtrace and backtrace_symbols: common code for examining
   2    backtraces.
   3    Copyright (C) 2013-2017 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <stdbool.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23
  24 /* Set to a non-zero value if the test fails.  */
  25 volatile int ret;
  26
  27 /* Accesses to X are used to prevent optimization.  */
  28 volatile int x;
  29
  30 /* Called if the test fails.  */
  31 #define FAIL() \
  32   do { printf ("Failure on line %d\n", __LINE__); ret = 1; } while (0)
  33
  34 /* Use this attribute to prevent inlining, so that all expected frames
  35    are present.  */
  36 #define NO_INLINE __attribute__ ((noinline, noclone, weak))
  37
  38 /* Look for a match in SYM from backtrace_symbols to NAME, a fragment
  39    of a function name.  Ignore the filename before '(', but presume
  40    that the function names are chosen so they cannot accidentally
  41    match the hex offset before the closing ')'. */
  42
  43 static inline bool
  44 match (const char *sym, const char *name)
  45 {
  46   char *p = strchr (sym, '(');
  47   return p != NULL && strstr (p, name) != NULL;
  48 }