diff options
Diffstat (limited to 'libshouldbeinlibc/assert-backtrace.c')
-rw-r--r-- | libshouldbeinlibc/assert-backtrace.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/libshouldbeinlibc/assert-backtrace.c b/libshouldbeinlibc/assert-backtrace.c new file mode 100644 index 00000000..ca23c8d2 --- /dev/null +++ b/libshouldbeinlibc/assert-backtrace.c @@ -0,0 +1,79 @@ +/* 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 "assert-backtrace.h" + +static void __attribute__ ((noreturn)) +__assert_fail_base_backtrace (const char *fmt, + const char *assertion, + const char *file, + unsigned int line, + const char *function) +{ + const size_t size = 128; + const size_t skip = 2; + 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); + 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); + +} + +#endif /* ! defined NDEBUG */ |