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Diffstat (limited to '3rdparty/libbacktrace/edtest.c')
-rw-r--r-- | 3rdparty/libbacktrace/edtest.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/3rdparty/libbacktrace/edtest.c b/3rdparty/libbacktrace/edtest.c new file mode 100644 index 000000000..3a2cac411 --- /dev/null +++ b/3rdparty/libbacktrace/edtest.c @@ -0,0 +1,121 @@ +/* edtest.c -- Test for libbacktrace storage allocation stress handling + Copyright (C) 2017-2018 Free Software Foundation, Inc. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + (1) Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + (2) Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + + (3) The name of the author may not be used to + endorse or promote products derived from this software without + specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR +IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, +INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING +IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +POSSIBILITY OF SUCH DAMAGE. */ + +#include "config.h" + +#include <assert.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> + +#include "backtrace.h" +#include "backtrace-supported.h" +#include "internal.h" + +#include "testlib.h" + +static int test1 (void) __attribute__ ((noinline, unused)); +static int test1 (void) __attribute__ ((noinline, unused)); +extern int f2 (int); +extern int f3 (int, int); + +static int +test1 (void) +{ + /* Returning a value here and elsewhere avoids a tailcall which + would mess up the backtrace. */ + return f2 (__LINE__) + 1; +} + +int +f3 (int f1line, int f2line) +{ + struct info all[20]; + struct bdata data; + int f3line; + int i; + + data.all = &all[0]; + data.index = 0; + data.max = 20; + data.failed = 0; + + f3line = __LINE__ + 1; + i = backtrace_full (state, 0, callback_one, error_callback_one, &data); + + if (i != 0) + { + fprintf (stderr, "test1: unexpected return value %d\n", i); + data.failed = 1; + } + + if (data.index < 3) + { + fprintf (stderr, + "test1: not enough frames; got %zu, expected at least 3\n", + data.index); + data.failed = 1; + } + + check ("test1", 0, all, f3line, "f3", "edtest.c", &data.failed); + check ("test1", 1, all, f2line, "f2", "edtest2_build.c", &data.failed); + check ("test1", 2, all, f1line, "test1", "edtest.c", &data.failed); + + printf ("%s: backtrace_full alloc stress\n", data.failed ? "FAIL" : "PASS"); + + if (data.failed) + ++failures; + + return failures; +} + +int +main (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED) +{ + state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS, + error_callback_create, NULL); + + // Grab the storage allocation lock prior to doing anything interesting. + // The intent here is to insure that the backtrace_alloc code is forced + // to always call mmap() for new memory as opposed to reusing previously + // allocated memory from the free list. Doing things this way helps + // simulate what you might see in a multithreaded program in which there + // are racing calls to the allocator. + struct backtrace_state *state_internal = + (struct backtrace_state *) state; + state_internal->lock_alloc = 1; + + // Kick off the test + test1(); + + exit (failures > 0 ? EXIT_FAILURE : EXIT_SUCCESS); +} |