518 lines
12 KiB
C
518 lines
12 KiB
C
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/* btest.c -- Test for libbacktrace library
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Copyright (C) 2012-2021 Free Software Foundation, Inc.
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Written by Ian Lance Taylor, Google.
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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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/* This program tests the externally visible interfaces of the
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libbacktrace library. */
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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 <sys/stat.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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/* Test the backtrace function with non-inlined functions. */
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static int test1 (void) __attribute__ ((noinline, noclone, unused));
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static int f2 (int) __attribute__ ((noinline, noclone));
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static int f3 (int, int) __attribute__ ((noinline, noclone));
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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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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, 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", "btest.c", &data.failed);
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check ("test1", 1, all, f2line, "f2", "btest.c", &data.failed);
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check ("test1", 2, all, f1line, "test1", "btest.c", &data.failed);
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printf ("%s: backtrace_full noinline\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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/* Test the backtrace function with inlined functions. */
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static inline int test2 (void) __attribute__ ((always_inline, unused));
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static inline int f12 (int) __attribute__ ((always_inline));
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static inline int f13 (int, int) __attribute__ ((always_inline));
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static inline int
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test2 (void)
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{
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return f12 (__LINE__) + 1;
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}
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static inline int
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f12 (int f1line)
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{
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return f13 (f1line, __LINE__) + 2;
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}
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static inline int
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f13 (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, "test2: unexpected return value %d\n", i);
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data.failed = 1;
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}
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check ("test2", 0, all, f3line, "f13", "btest.c", &data.failed);
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check ("test2", 1, all, f2line, "f12", "btest.c", &data.failed);
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check ("test2", 2, all, f1line, "test2", "btest.c", &data.failed);
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printf ("%s: backtrace_full inline\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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/* Test the backtrace_simple function with non-inlined functions. */
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static int test3 (void) __attribute__ ((noinline, noclone, unused));
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static int f22 (int) __attribute__ ((noinline, noclone));
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static int f23 (int, int) __attribute__ ((noinline, noclone));
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static int
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test3 (void)
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{
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return f22 (__LINE__) + 1;
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}
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static int
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f22 (int f1line)
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{
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return f23 (f1line, __LINE__) + 2;
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}
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static int
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f23 (int f1line, int f2line)
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{
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uintptr_t addrs[20];
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struct sdata data;
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int f3line;
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int i;
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data.addrs = &addrs[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_simple (state, 0, callback_two, error_callback_two, &data);
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if (i != 0)
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{
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fprintf (stderr, "test3: unexpected return value %d\n", i);
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data.failed = 1;
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}
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if (!data.failed)
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{
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struct info all[20];
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struct bdata bdata;
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int j;
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bdata.all = &all[0];
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bdata.index = 0;
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bdata.max = 20;
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bdata.failed = 0;
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for (j = 0; j < 3; ++j)
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{
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i = backtrace_pcinfo (state, addrs[j], callback_one,
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error_callback_one, &bdata);
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if (i != 0)
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{
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fprintf (stderr,
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("test3: unexpected return value "
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"from backtrace_pcinfo %d\n"),
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i);
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bdata.failed = 1;
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}
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if (!bdata.failed && bdata.index != (size_t) (j + 1))
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{
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fprintf (stderr,
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("wrong number of calls from backtrace_pcinfo "
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"got %u expected %d\n"),
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(unsigned int) bdata.index, j + 1);
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bdata.failed = 1;
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}
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}
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check ("test3", 0, all, f3line, "f23", "btest.c", &bdata.failed);
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check ("test3", 1, all, f2line, "f22", "btest.c", &bdata.failed);
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check ("test3", 2, all, f1line, "test3", "btest.c", &bdata.failed);
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if (bdata.failed)
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data.failed = 1;
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for (j = 0; j < 3; ++j)
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{
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struct symdata symdata;
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symdata.name = NULL;
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symdata.val = 0;
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symdata.size = 0;
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symdata.failed = 0;
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i = backtrace_syminfo (state, addrs[j], callback_three,
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error_callback_three, &symdata);
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if (i == 0)
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{
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fprintf (stderr,
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("test3: [%d]: unexpected return value "
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"from backtrace_syminfo %d\n"),
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j, i);
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symdata.failed = 1;
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}
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if (!symdata.failed)
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{
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const char *expected;
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switch (j)
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{
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case 0:
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expected = "f23";
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break;
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case 1:
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expected = "f22";
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break;
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case 2:
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expected = "test3";
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break;
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default:
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assert (0);
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}
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if (symdata.name == NULL)
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{
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fprintf (stderr, "test3: [%d]: NULL syminfo name\n", j);
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symdata.failed = 1;
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}
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/* Use strncmp, not strcmp, because GCC might create a
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clone. */
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else if (strncmp (symdata.name, expected, strlen (expected))
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!= 0)
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{
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fprintf (stderr,
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("test3: [%d]: unexpected syminfo name "
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"got %s expected %s\n"),
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j, symdata.name, expected);
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symdata.failed = 1;
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}
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}
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if (symdata.failed)
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data.failed = 1;
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}
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}
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printf ("%s: backtrace_simple noinline\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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/* Test the backtrace_simple function with inlined functions. */
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static inline int test4 (void) __attribute__ ((always_inline, unused));
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static inline int f32 (int) __attribute__ ((always_inline));
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static inline int f33 (int, int) __attribute__ ((always_inline));
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static inline int
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test4 (void)
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{
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return f32 (__LINE__) + 1;
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}
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static inline int
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f32 (int f1line)
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{
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return f33 (f1line, __LINE__) + 2;
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}
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static inline int
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f33 (int f1line, int f2line)
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{
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uintptr_t addrs[20];
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struct sdata data;
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int f3line;
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int i;
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data.addrs = &addrs[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_simple (state, 0, callback_two, error_callback_two, &data);
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if (i != 0)
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{
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fprintf (stderr, "test3: unexpected return value %d\n", i);
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data.failed = 1;
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}
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if (!data.failed)
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{
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struct info all[20];
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struct bdata bdata;
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bdata.all = &all[0];
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bdata.index = 0;
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bdata.max = 20;
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bdata.failed = 0;
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i = backtrace_pcinfo (state, addrs[0], callback_one, error_callback_one,
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&bdata);
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if (i != 0)
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{
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fprintf (stderr,
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("test4: unexpected return value "
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"from backtrace_pcinfo %d\n"),
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i);
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bdata.failed = 1;
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}
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check ("test4", 0, all, f3line, "f33", "btest.c", &bdata.failed);
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check ("test4", 1, all, f2line, "f32", "btest.c", &bdata.failed);
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check ("test4", 2, all, f1line, "test4", "btest.c", &bdata.failed);
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if (bdata.failed)
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data.failed = 1;
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}
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printf ("%s: backtrace_simple inline\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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static int test5 (void) __attribute__ ((unused));
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int global = 1;
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static int
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test5 (void)
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{
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struct symdata symdata;
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int i;
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uintptr_t addr = (uintptr_t) &global;
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if (sizeof (global) > 1)
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|
addr += 1;
|
||
|
|
|
||
|
|
symdata.name = NULL;
|
||
|
|
symdata.val = 0;
|
||
|
|
symdata.size = 0;
|
||
|
|
symdata.failed = 0;
|
||
|
|
|
||
|
|
i = backtrace_syminfo (state, addr, callback_three,
|
||
|
|
error_callback_three, &symdata);
|
||
|
|
if (i == 0)
|
||
|
|
{
|
||
|
|
fprintf (stderr,
|
||
|
|
"test5: unexpected return value from backtrace_syminfo %d\n",
|
||
|
|
i);
|
||
|
|
symdata.failed = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!symdata.failed)
|
||
|
|
{
|
||
|
|
if (symdata.name == NULL)
|
||
|
|
{
|
||
|
|
fprintf (stderr, "test5: NULL syminfo name\n");
|
||
|
|
symdata.failed = 1;
|
||
|
|
}
|
||
|
|
else if (!(strncmp (symdata.name, "global", 6) == 0
|
||
|
|
&& (symdata.name[6] == '\0'|| symdata.name[6] == '.')))
|
||
|
|
{
|
||
|
|
fprintf (stderr,
|
||
|
|
"test5: unexpected syminfo name got %s expected %s\n",
|
||
|
|
symdata.name, "global");
|
||
|
|
symdata.failed = 1;
|
||
|
|
}
|
||
|
|
else if (symdata.val != (uintptr_t) &global)
|
||
|
|
{
|
||
|
|
fprintf (stderr,
|
||
|
|
"test5: unexpected syminfo value got %lx expected %lx\n",
|
||
|
|
(unsigned long) symdata.val,
|
||
|
|
(unsigned long) (uintptr_t) &global);
|
||
|
|
symdata.failed = 1;
|
||
|
|
}
|
||
|
|
else if (symdata.size != sizeof (global))
|
||
|
|
{
|
||
|
|
fprintf (stderr,
|
||
|
|
"test5: unexpected syminfo size got %lx expected %lx\n",
|
||
|
|
(unsigned long) symdata.size,
|
||
|
|
(unsigned long) sizeof (global));
|
||
|
|
symdata.failed = 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
printf ("%s: backtrace_syminfo variable\n",
|
||
|
|
symdata.failed ? "FAIL" : "PASS");
|
||
|
|
|
||
|
|
if (symdata.failed)
|
||
|
|
++failures;
|
||
|
|
|
||
|
|
return failures;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define MIN_DESCRIPTOR 3
|
||
|
|
#define MAX_DESCRIPTOR 10
|
||
|
|
|
||
|
|
static int fstat_status[MAX_DESCRIPTOR];
|
||
|
|
|
||
|
|
/* Check files that are available. */
|
||
|
|
|
||
|
|
static void
|
||
|
|
check_available_files (void)
|
||
|
|
{
|
||
|
|
struct stat s;
|
||
|
|
for (unsigned i = MIN_DESCRIPTOR; i < MAX_DESCRIPTOR; i++)
|
||
|
|
fstat_status[i] = fstat (i, &s);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Check that are no files left open. */
|
||
|
|
|
||
|
|
static void
|
||
|
|
check_open_files (void)
|
||
|
|
{
|
||
|
|
for (unsigned i = MIN_DESCRIPTOR; i < MAX_DESCRIPTOR; i++)
|
||
|
|
{
|
||
|
|
if (fstat_status[i] != 0 && close (i) == 0)
|
||
|
|
{
|
||
|
|
fprintf (stderr,
|
||
|
|
"ERROR: descriptor %d still open after tests complete\n",
|
||
|
|
i);
|
||
|
|
++failures;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Run all the tests. */
|
||
|
|
|
||
|
|
int
|
||
|
|
main (int argc ATTRIBUTE_UNUSED, char **argv)
|
||
|
|
{
|
||
|
|
check_available_files ();
|
||
|
|
|
||
|
|
state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS,
|
||
|
|
error_callback_create, NULL);
|
||
|
|
|
||
|
|
#if BACKTRACE_SUPPORTED
|
||
|
|
test1 ();
|
||
|
|
test2 ();
|
||
|
|
test3 ();
|
||
|
|
test4 ();
|
||
|
|
#if BACKTRACE_SUPPORTS_DATA
|
||
|
|
test5 ();
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
check_open_files ();
|
||
|
|
|
||
|
|
exit (failures ? EXIT_FAILURE : EXIT_SUCCESS);
|
||
|
|
}
|