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0b7c7473b9
When debugging failures in this test, it's helpful to see as much output as possible. So rather than returning immediately, let the code run as far as it can. We still mark failures as soon as they happen. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
124 lines
2.9 KiB
C
124 lines
2.9 KiB
C
/* Test backtrace and backtrace_symbols for signal frames.
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Copyright (C) 2011-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <execinfo.h>
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#include <search.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <signal.h>
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#include <unistd.h>
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#include "tst-backtrace.h"
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static int do_test (void);
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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/* The backtrace should include at least handle_signal, a signal
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trampoline, 3 * fn, and do_test. */
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#define NUM_FUNCTIONS 6
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volatile int sig_handled = 0;
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void
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handle_signal (int signum)
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{
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void *addresses[NUM_FUNCTIONS];
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char **symbols;
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int n;
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int i;
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sig_handled = 1;
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/* Get the backtrace addresses. */
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n = backtrace (addresses, sizeof (addresses) / sizeof (addresses[0]));
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printf ("Obtained backtrace with %d functions (but wanted at least %d)\n",
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n, NUM_FUNCTIONS);
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/* Check that there are at least six functions. */
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if (n < NUM_FUNCTIONS)
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{
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FAIL ();
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/* Only return if we got no symbols at all. The partial output is
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still useful for debugging failures. */
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if (n <= 0)
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return;
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}
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/* Convert them to symbols. */
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symbols = backtrace_symbols (addresses, n);
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/* Check that symbols were obtained. */
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if (symbols == NULL)
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{
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FAIL ();
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return;
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}
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for (i = 0; i < n; ++i)
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printf ("Function %d: %s\n", i, symbols[i]);
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/* Check that the function names obtained are accurate. */
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if (!match (symbols[0], "handle_signal"))
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FAIL ();
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/* Do not check name for signal trampoline. */
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for (i = 2; i < n - 1; i++)
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if (!match (symbols[i], "fn"))
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{
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FAIL ();
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return;
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}
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/* Symbol names are not available for static functions, so we do not
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check do_test. */
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}
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NO_INLINE int
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fn (int c)
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{
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pid_t parent_pid, child_pid;
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if (c > 0)
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{
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fn (c - 1);
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return x;
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}
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signal (SIGUSR1, handle_signal);
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parent_pid = getpid ();
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child_pid = fork ();
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if (child_pid == (pid_t) -1)
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abort ();
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else if (child_pid == 0)
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{
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sleep (1);
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kill (parent_pid, SIGUSR1);
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_exit (0);
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}
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/* In the parent. */
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while (sig_handled == 0)
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;
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return 0;
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}
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NO_INLINE static int
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do_test (void)
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{
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fn (2);
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return ret;
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}
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