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t_backtrace.c revision 1.4
      1 /*	$NetBSD: t_backtrace.c,v 1.4 2012/05/30 15:11:58 jruoho Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2012 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 #include <sys/cdefs.h>
     32 __RCSID("$NetBSD: t_backtrace.c,v 1.4 2012/05/30 15:11:58 jruoho Exp $");
     33 
     34 #include <atf-c.h>
     35 #include <atf-c/config.h>
     36 #include <string.h>
     37 #include <stdlib.h>
     38 #include <execinfo.h>
     39 
     40 #ifndef __arraycount
     41 #define __arraycount(a) (sizeof(a) / sizeof(a[0]))
     42 #endif
     43 
     44 static void __attribute__((__noinline__))
     45 myfunc3(size_t ncalls)
     46 {
     47 	static const char *top[] = { "myfunc", "atfu_backtrace_fmt_basic_body",
     48 	    "atf_tc_run", "atf_tp_main", "main", "___start" };
     49 	size_t j, nptrs;
     50 	void *buffer[ncalls + 10];
     51 	char **strings;
     52 
     53 	nptrs = backtrace(buffer, __arraycount(buffer));
     54 	ATF_REQUIRE_EQ(nptrs, ncalls + 8);
     55 
     56 	strings = backtrace_symbols_fmt(buffer, nptrs, "%n");
     57 
     58 	ATF_CHECK(strings != NULL);
     59 	ATF_CHECK_STREQ(strings[0], "myfunc3");
     60 	ATF_CHECK_STREQ(strings[1], "myfunc2");
     61 
     62 	for (j = 2; j < ncalls + 2; j++)
     63 		ATF_CHECK_STREQ(strings[j], "myfunc1");
     64 
     65 	for (size_t i = 0; j < nptrs; i++, j++)
     66 		ATF_CHECK_STREQ(strings[j], top[i]);
     67 
     68 	free(strings);
     69 }
     70 
     71 static void __attribute__((__noinline__))
     72 myfunc2(size_t ncalls)
     73 {
     74 	myfunc3(ncalls);
     75 }
     76 
     77 static void __attribute__((__noinline__))
     78 myfunc1(size_t origcalls, size_t ncalls)
     79 {
     80 	if (ncalls > 1)
     81 		myfunc1(origcalls, ncalls - 1);
     82 	else
     83 		myfunc2(origcalls);
     84 }
     85 
     86 static void __attribute__((__noinline__))
     87 myfunc(size_t ncalls)
     88 {
     89 	myfunc1(ncalls, ncalls);
     90 }
     91 
     92 ATF_TC(backtrace_fmt_basic);
     93 ATF_TC_HEAD(backtrace_fmt_basic, tc)
     94 {
     95         atf_tc_set_md_var(tc, "descr", "Test backtrace_fmt(3)");
     96 }
     97 
     98 ATF_TC_BODY(backtrace_fmt_basic, tc)
     99 {
    100 	const char *arch = atf_config_get("atf_arch");
    101 
    102         if (strcmp(arch, "amd64") != 0)
    103         	atf_tc_skip("PR toolchain/46490: libexecinfo only"
    104 		    " works on amd64 currently");
    105 
    106 	myfunc(12);
    107 }
    108 
    109 ATF_TP_ADD_TCS(tp)
    110 {
    111 
    112 	ATF_TP_ADD_TC(tp, backtrace_fmt_basic);
    113 
    114 	return atf_no_error();
    115 }
    116