mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-15 04:20:28 +08:00
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
|
/* Test backtrace and backtrace_symbols for recursive calls.
|
||
|
|
Copyright (C) 2010-2013 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>
|
||
|
|
|
||
|
|
static int do_test (void);
|
||
|
|
#define TEST_FUNCTION do_test ()
|
||
|
|
#include "../test-skeleton.c"
|
||
|
|
|
||
|
|
/* Set to a non-zero value if the test fails. */
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/* Accesses to X are used to prevent optimization. */
|
||
|
|
volatile int x;
|
||
|
|
|
||
|
|
/* Called if the test fails. */
|
||
|
|
#define FAIL() \
|
||
|
|
do { printf ("Failure on line %d\n", __LINE__); ret = 1; } while (0)
|
||
|
|
|
||
|
|
/* The backtrace should include at least 3 * fn, and do_test. */
|
||
|
|
#define NUM_FUNCTIONS 4
|
||
|
|
|
||
|
|
/* Use this attribute to prevent inlining, so that all expected frames
|
||
|
|
are present. */
|
||
|
|
#define NO_INLINE __attribute__ ((noinline))
|
||
|
|
|
||
|
|
NO_INLINE int
|
||
|
|
fn (int c)
|
||
|
|
{
|
||
|
|
void *addresses[NUM_FUNCTIONS];
|
||
|
|
char **symbols;
|
||
|
|
int n;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (c > 0)
|
||
|
|
{
|
||
|
|
fn (c - 1);
|
||
|
|
return x;
|
||
|
|
}
|
||
|
|
/* 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 four functions. */
|
||
|
|
if (n < NUM_FUNCTIONS)
|
||
|
|
{
|
||
|
|
FAIL ();
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
/* Convert them to symbols. */
|
||
|
|
symbols = backtrace_symbols (addresses, n);
|
||
|
|
/* Check that symbols were obtained. */
|
||
|
|
if (symbols == NULL)
|
||
|
|
{
|
||
|
|
FAIL ();
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
for (i = 0; i < n; ++i)
|
||
|
|
printf ("Function %d: %s\n", i, symbols[i]);
|
||
|
|
/* Check that the function names obtained are accurate. */
|
||
|
|
for (i = 0; i < n - 1; ++i)
|
||
|
|
if (strstr (symbols[i], "fn") == NULL)
|
||
|
|
{
|
||
|
|
FAIL ();
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
/* Symbol names are not available for static functions, so we do not
|
||
|
|
check do_test. */
|
||
|
|
return x;
|
||
|
|
}
|
||
|
|
|
||
|
|
NO_INLINE static int
|
||
|
|
do_test (void)
|
||
|
|
{
|
||
|
|
fn (2);
|
||
|
|
return ret;
|
||
|
|
}
|