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https://sourceware.org/git/glibc.git
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5d5b3bd94c
Validation for pointer returned by backtrace_symbols () added. Type of variables size and i is changed from size_t to int. Variable size is used to collect the result from backtrace () that is an int. i is the loop counter variable so it can be an int. Since, size_t size is changed to int size, in printf %zd is changed to %d. Reviewed-by: DJ Delorie <dj@redhat.com>
56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
/* Obtain a backtrace and print it.
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Copyright (C) 1991-2020 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <https://www.gnu.org/licenses/>.
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*/
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#include <execinfo.h>
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#include <stdio.h>
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#include <stdlib.h>
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/* Obtain a backtrace and print it to @code{stdout}. */
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void
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print_trace (void)
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{
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void *array[10];
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char **strings;
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int size, i;
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size = backtrace (array, 10);
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strings = backtrace_symbols (array, size);
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if (strings != NULL)
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{
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printf ("Obtained %d stack frames.\n", size);
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for (i = 0; i < size; i++)
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printf ("%s\n", strings[i]);
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}
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free (strings);
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}
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/* A dummy function to make the backtrace more interesting. */
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void
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dummy_function (void)
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{
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print_trace ();
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}
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int
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main (void)
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{
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dummy_function ();
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return 0;
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}
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