mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 22:30:07 +00:00
140 lines
3.2 KiB
C
140 lines
3.2 KiB
C
/* Test backtrace and backtrace_symbols for signal frames, where a
|
|
system call was interrupted by a signal.
|
|
Copyright (C) 2011-2017 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <execinfo.h>
|
|
#include <search.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
|
|
#include "tst-backtrace.h"
|
|
|
|
#ifndef SIGACTION_FLAGS
|
|
# define SIGACTION_FLAGS 0
|
|
#endif
|
|
|
|
/* The backtrace should include at least handle_signal, a signal
|
|
trampoline, read, 3 * fn, and do_test. */
|
|
#define NUM_FUNCTIONS 7
|
|
|
|
void
|
|
handle_signal (int signum)
|
|
{
|
|
void *addresses[NUM_FUNCTIONS];
|
|
char **symbols;
|
|
int n;
|
|
int i;
|
|
|
|
/* Get the backtrace addresses. */
|
|
n = backtrace (addresses, sizeof (addresses) / sizeof (addresses[0]));
|
|
printf ("Obtained backtrace with %d functions\n", n);
|
|
/* Check that there are at least seven functions. */
|
|
if (n < NUM_FUNCTIONS)
|
|
{
|
|
FAIL ();
|
|
return;
|
|
}
|
|
/* Convert them to symbols. */
|
|
symbols = backtrace_symbols (addresses, n);
|
|
/* Check that symbols were obtained. */
|
|
if (symbols == NULL)
|
|
{
|
|
FAIL ();
|
|
return;
|
|
}
|
|
for (i = 0; i < n; ++i)
|
|
printf ("Function %d: %s\n", i, symbols[i]);
|
|
/* Check that the function names obtained are accurate. */
|
|
if (!match (symbols[0], "handle_signal"))
|
|
{
|
|
FAIL ();
|
|
return;
|
|
}
|
|
/* Do not check name for signal trampoline. */
|
|
i = 2;
|
|
if (!match (symbols[i++], "read"))
|
|
{
|
|
/* Perhaps symbols[2] is __kernel_vsyscall? */
|
|
if (!match (symbols[i++], "read"))
|
|
{
|
|
FAIL ();
|
|
return;
|
|
}
|
|
}
|
|
for (; i < n - 1; i++)
|
|
if (!match (symbols[i], "fn"))
|
|
{
|
|
FAIL ();
|
|
return;
|
|
}
|
|
/* Symbol names are not available for static functions, so we do not
|
|
check do_test. */
|
|
}
|
|
|
|
NO_INLINE int
|
|
fn (int c, int flags)
|
|
{
|
|
pid_t parent_pid, child_pid;
|
|
int pipefd[2];
|
|
char r[1];
|
|
struct sigaction act;
|
|
|
|
if (c > 0)
|
|
{
|
|
fn (c - 1, flags);
|
|
return x;
|
|
}
|
|
|
|
memset (&act, 0, sizeof (act));
|
|
act.sa_handler = handle_signal;
|
|
act.sa_flags = flags;
|
|
sigemptyset (&act.sa_mask);
|
|
sigaction (SIGUSR1, &act, NULL);
|
|
parent_pid = getpid ();
|
|
if (pipe (pipefd) == -1)
|
|
abort ();
|
|
|
|
child_pid = fork ();
|
|
if (child_pid == (pid_t) -1)
|
|
abort ();
|
|
else if (child_pid == 0)
|
|
{
|
|
sleep (1);
|
|
kill (parent_pid, SIGUSR1);
|
|
_exit (0);
|
|
}
|
|
|
|
/* In the parent. */
|
|
read (pipefd[0], r, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
NO_INLINE int
|
|
do_test (void)
|
|
{
|
|
fn (2, SIGACTION_FLAGS);
|
|
return ret;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|