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/* Augment failing assertions with backtraces.
Copyright (C) 2015,2016 Free Software Foundation, Inc.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with the GNU Hurd. If not, see <http://www.gnu.org/licenses/>. */
#ifndef NDEBUG
#include <error.h>
#include <errno.h>
#include <execinfo.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <mach/mach_traps.h>
#include "assert-backtrace.h"
static const size_t size = 128;
static const size_t skip = 2;
static void __attribute__ ((noreturn))
__assert_fail_base_backtrace (const char *fmt,
const char *assertion,
const char *file,
unsigned int line,
const char *function)
{
int nptrs;
void *buffer[size];
nptrs = backtrace(buffer, size);
if (nptrs == 0)
error (1, *__errno_location (), "backtrace");
fprintf (stderr,
fmt, program_invocation_name, file, line, function, assertion);
if (nptrs > skip)
{
backtrace_symbols_fd (&buffer[skip], nptrs - skip, STDERR_FILENO);
fflush (stderr);
}
/* Die. */
abort ();
}
void
__assert_fail_backtrace (const char *assertion, const char *file,
unsigned int line, const char *function)
{
__assert_fail_base_backtrace ("%s: %s:%u: %s: Assertion '%s' failed.\n",
assertion, file, line, function);
}
void
__assert_perror_fail_backtrace (int errnum,
const char *file,
unsigned int line,
const char *function)
{
char errbuf[1024];
char *e = strerror_r (errnum, errbuf, sizeof errbuf);
__assert_fail_base_backtrace ("%s: %s:%u: %s: Unexpected error: %s.\n",
e, file, line, function);
}
void
backtrace_stderr (void)
{
int nptrs;
void *buffer[size];
nptrs = backtrace (buffer, size);
backtrace_symbols_fd (buffer, nptrs, STDERR_FILENO);
fflush (stderr);
}
void
backtrace_mach (void)
{
int nptrs;
void *buffer[size];
char **symbols;
int i;
nptrs = backtrace (buffer, size);
symbols = backtrace_symbols (buffer, nptrs);
for (i = 0; i < nptrs; i++)
{
mach_print(symbols[i]);
mach_print("\n");
}
free(symbols);
}
#endif /* ! defined NDEBUG */
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