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d665cd9b13
Add test-case that forces alloc.c functions to fail, and check whether fail handling is robust. This is the test-case for "[libbacktrace] Fix segfault upon allocation failure". Without that patch, this test-case fails like this: ... allocfail.sh: line 71: 26041 Segmentation fault (core dumped) \ ./allocfail $i > /dev/null 2>&1 Unallowed fail found: 13 FAIL allocfail.sh (exit status: 1) ... This is a seperate patch because the test-case is nontrivial. Bootstrapped and reg-tested on x86_64. 2018-12-12 Tom de Vries <tdevries@suse.de> * Makefile.am (TESTS): Add allocfail.sh. (check_PROGRAMS): Add allocfail. * Makefile.in: Regenerate. * instrumented_alloc.c: New file. Redefine malloc and realloc. Include alloc.c. * allocfail.c: New file. * allocfail.sh: New file. From-SVN: r267054
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
/* allocfail.c -- Test for libbacktrace library
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Copyright (C) 2018 Free Software Foundation, Inc.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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(1) Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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(2) Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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(3) The name of the author may not be used to
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endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE. */
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#include <assert.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 <unistd.h>
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#include "filenames.h"
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#include "backtrace.h"
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#include "backtrace-supported.h"
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#include "testlib.h"
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extern uint64_t get_nr_allocs (void);
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extern void set_fail_at_alloc (uint64_t);
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extern int at_fail_alloc_p (void);
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static int test1 (void) __attribute__ ((noinline, unused));
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static int f2 (int) __attribute__ ((noinline));
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static int f3 (int, int) __attribute__ ((noinline));
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static unsigned callback_errors = 0;
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static void
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error_callback_full (void *vdata ATTRIBUTE_UNUSED,
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const char *msg ATTRIBUTE_UNUSED,
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int errnum ATTRIBUTE_UNUSED)
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{
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if (at_fail_alloc_p ())
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{
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set_fail_at_alloc (0);
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return;
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}
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callback_errors++;
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}
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static int
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callback_full (void *vdata ATTRIBUTE_UNUSED, uintptr_t pc ATTRIBUTE_UNUSED,
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const char *filename ATTRIBUTE_UNUSED,
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int lineno ATTRIBUTE_UNUSED,
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const char *function ATTRIBUTE_UNUSED)
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{
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return 0;
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}
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static int
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test1 (void)
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{
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return f2 (__LINE__) + 1;
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}
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static int
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f2 (int f1line)
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{
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return f3 (f1line, __LINE__) + 2;
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}
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static int
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f3 (int f1line ATTRIBUTE_UNUSED, int f2line ATTRIBUTE_UNUSED)
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{
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int i;
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i = backtrace_full (state, 0, callback_full, error_callback_full, NULL);
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if (i != 0)
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{
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fprintf (stderr, "test1: unexpected return value %d\n", i);
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++failures;
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}
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if (callback_errors)
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++failures;
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return failures;
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}
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/* Run all the tests. */
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int
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main (int argc, char **argv)
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{
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uint64_t fail_at = 0;
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if (argc == 2)
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{
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fail_at = atoi (argv[1]);
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set_fail_at_alloc (fail_at);
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}
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state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS,
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error_callback_full, NULL);
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if (state == NULL)
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exit (failures ? EXIT_FAILURE : EXIT_SUCCESS);
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#if BACKTRACE_SUPPORTED
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test1 ();
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#endif
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if (argc == 1)
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fprintf (stderr, "%lu\n", get_nr_allocs ());
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exit (failures ? EXIT_FAILURE : EXIT_SUCCESS);
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}
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