[src/trunk]: src/tests/lib/libexecinfo add a test for the backtrace function.

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b2cedbf132b0
branches:  trunk
changeset: 779424:b2cedbf132b0
user:      christos <christos%NetBSD.org@localhost>
date:      Sun May 27 18:47:18 2012 +0000

description:
add a test for the backtrace function.

diffstat:

 tests/lib/libexecinfo/Makefile      |   13 ++++
 tests/lib/libexecinfo/t_backtrace.c |  108 ++++++++++++++++++++++++++++++++++++
 2 files changed, 121 insertions(+), 0 deletions(-)

diffs (129 lines):

diff -r 51dbc652d3bf -r b2cedbf132b0 tests/lib/libexecinfo/Makefile
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/lib/libexecinfo/Makefile    Sun May 27 18:47:18 2012 +0000
@@ -0,0 +1,13 @@
+# $NetBSD: Makefile,v 1.1 2012/05/27 18:47:18 christos Exp $
+
+.include <bsd.own.mk>
+
+TESTSDIR=      ${TESTSBASE}/lib/libm
+
+TESTS_C+=      t_backtrace
+
+LDADD+=                -lexecinfo -lelf
+DPADD+=                ${LIBEXECINFO} ${LIBELF}
+DBG=-O0                # prevent inlining, nothing else helps.
+
+.include <bsd.test.mk>
diff -r 51dbc652d3bf -r b2cedbf132b0 tests/lib/libexecinfo/t_backtrace.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/lib/libexecinfo/t_backtrace.c       Sun May 27 18:47:18 2012 +0000
@@ -0,0 +1,108 @@
+/*     $NetBSD: t_backtrace.c,v 1.1 2012/05/27 18:47:18 christos Exp $ */
+
+/*-
+ * Copyright (c) 2012 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Christos Zoulas.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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 <sys/cdefs.h>
+__RCSID("$NetBSD: t_backtrace.c,v 1.1 2012/05/27 18:47:18 christos Exp $");
+
+#include <atf-c.h>
+#include <string.h>
+#include <stdlib.h>
+#include <execinfo.h>
+
+#ifndef __arraycount
+#define __arraycount(a) (sizeof(a) / sizeof(a[0]))
+#endif
+
+static void __attribute__((__noinline__))
+myfunc3(size_t ncalls)
+{
+       static const char *top[] = { "myfunc", "atfu_backtrace_fmt_basic_body",
+           "atf_tc_run", "atf_tp_main", "main", "___start" };
+       size_t j, nptrs;
+       void *buffer[ncalls + 10];
+       char **strings;
+
+       nptrs = backtrace(buffer, __arraycount(buffer));
+       ATF_CHECK_EQ(nptrs, ncalls + 8);
+
+       strings = backtrace_symbols_fmt(buffer, nptrs, "%n");
+
+       ATF_CHECK(strings != NULL);
+       ATF_CHECK_STREQ(strings[0], "myfunc3");
+       ATF_CHECK_STREQ(strings[1], "myfunc2");
+
+       for (j = 2; j < ncalls + 2; j++)
+               ATF_CHECK_STREQ(strings[j], "myfunc1");
+
+       for (size_t i = 0; j < nptrs; i++, j++)
+               ATF_CHECK_STREQ(strings[j], top[i]);
+
+       free(strings);
+}
+
+static void __attribute__((__noinline__))
+myfunc2(size_t ncalls)
+{
+       myfunc3(ncalls);
+}
+
+static void __attribute__((__noinline__))
+myfunc1(size_t origcalls, size_t ncalls)
+{
+       if (ncalls > 1)
+               myfunc1(origcalls, ncalls - 1);
+       else
+               myfunc2(origcalls);
+}
+
+static void __attribute__((__noinline__))
+myfunc(size_t ncalls)
+{
+       myfunc1(ncalls, ncalls);
+}
+
+ATF_TC(backtrace_fmt_basic);
+ATF_TC_HEAD(backtrace_fmt_basic, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Test backtrace_fmt(3)");
+}
+
+ATF_TC_BODY(backtrace_fmt_basic, tc)
+{
+       myfunc(12);
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+       ATF_TP_ADD_TC(tp, backtrace_fmt_basic);
+
+       return atf_no_error();
+}