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63a4b10683
This copies in libbacktrace from the gcc repository as it was in the commit 62e420293a293608f383d9b9c7f2debd666e9fc9. GDB is going to start using this library soon. A dependency between GDB and libbacktrace has already been added to the top level Makefile, so, after this commit, when building GDB, libbacktrace will be built first. However, libbacktrace is not yet linked into GDB, or used by GDB in any way. It is possible to stop libbacktrace being built by configuring the tree with --disable-libbacktrace. This commit does NOT update src-release.sh, that will be done in the next commit, this commit ONLY imports libbacktrace from gcc. This means that if you try to make a release of GDB from exactly this commit then the release tar file will not include libbacktrace. However, as libbacktrace is an optional dependency this is fine.
121 lines
3.7 KiB
C
121 lines
3.7 KiB
C
/* edtest.c -- Test for libbacktrace storage allocation stress handling
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Copyright (C) 2017-2021 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 "config.h"
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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 <sys/types.h>
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#include "backtrace.h"
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#include "backtrace-supported.h"
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#include "internal.h"
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#include "testlib.h"
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static int test1 (void) __attribute__ ((noinline, noclone, unused));
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extern int f2 (int);
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extern int f3 (int, int);
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static int
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test1 (void)
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{
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/* Returning a value here and elsewhere avoids a tailcall which
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would mess up the backtrace. */
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return f2 (__LINE__) + 1;
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}
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int
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f3 (int f1line, int f2line)
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{
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struct info all[20];
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struct bdata data;
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int f3line;
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int i;
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data.all = &all[0];
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data.index = 0;
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data.max = 20;
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data.failed = 0;
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f3line = __LINE__ + 1;
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i = backtrace_full (state, 0, callback_one, error_callback_one, &data);
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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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data.failed = 1;
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}
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if (data.index < 3)
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{
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fprintf (stderr,
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"test1: not enough frames; got %zu, expected at least 3\n",
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data.index);
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data.failed = 1;
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}
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check ("test1", 0, all, f3line, "f3", "edtest.c", &data.failed);
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check ("test1", 1, all, f2line, "f2", "edtest2_build.c", &data.failed);
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check ("test1", 2, all, f1line, "test1", "edtest.c", &data.failed);
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printf ("%s: backtrace_full alloc stress\n", data.failed ? "FAIL" : "PASS");
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if (data.failed)
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++failures;
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return failures;
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}
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int
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main (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
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{
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state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS,
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error_callback_create, NULL);
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// Grab the storage allocation lock prior to doing anything interesting.
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// The intent here is to insure that the backtrace_alloc code is forced
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// to always call mmap() for new memory as opposed to reusing previously
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// allocated memory from the free list. Doing things this way helps
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// simulate what you might see in a multithreaded program in which there
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// are racing calls to the allocator.
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struct backtrace_state *state_internal =
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(struct backtrace_state *) state;
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state_internal->lock_alloc = 1;
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// Kick off the test
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test1();
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exit (failures > 0 ? EXIT_FAILURE : EXIT_SUCCESS);
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}
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