1  /* Test backtrace and backtrace_symbols: common code for examining
       2     backtraces.
       3     Copyright (C) 2013-2023 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     <https://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  }