Add regress test for libexecinfo.

ok kettenis@ sthen@

diff --git a/regress/lib/libexecinfo/Makefile b/regress/lib/libexecinfo/Makefile
new file mode 100644 (file)
index 0000000..a4fdbbe
--- /dev/null
+++ b/regress/lib/libexecinfo/Makefile
@@ -0,0 +1,34 @@
+# $OpenBSD: Makefile,v 1.1 2021/06/09 19:39:15 mortimer Exp $
+
+.include <bsd.own.mk>
+
+.if ${COMPILER_VERSION} == "clang"
+PROG=  t_backtrace
+
+.PATH: ${SRCDIR} ${BSDSRCDIR}/regress/lib/libc/sys/
+SRCS+= t_backtrace.c atf-c.c
+
+.if empty(CFLAGS:M-std=*)
+CFLAGS+=  -std=gnu99
+.endif
+
+CFLAGS+=       -I${BSDSRCDIR}/regress/lib/libc/sys/
+LDFLAGS+=      -Wl,--export-dynamic
+LDADD+=        -lexecinfo
+DPADD+=        ${LIBEXECINFO}
+
+# Only needed while this lib is not installed
+CFLAGS+= -I${BSDSRCDIR}/lib/libexecinfo/
+LDFLAGS+= -L${BSDOBJDIR}/lib/libexecinfo/
+
+run-regress-${PROG}: ${PROG}
+       ./${PROG} -r 1
+
+.else # Not clang arch
+REGRESS_TARGETS=run-regress-skiparch
+run-regress-skiparch:
+       # backtrace() is a noop on non-unwind arches.
+       @echo SKIPPED
+.endif
+
+.include <bsd.regress.mk>

diff --git a/regress/lib/libexecinfo/t_backtrace.c b/regress/lib/libexecinfo/t_backtrace.c
new file mode 100644 (file)
index 0000000..9a3408e
--- /dev/null
+++ b/regress/lib/libexecinfo/t_backtrace.c
@@ -0,0 +1,163 @@
+/*     $OpenBSD: t_backtrace.c,v 1.1 2021/06/09 19:39:15 mortimer 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>
+
+#include <atf-c.h>
+#include <string.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <execinfo.h>
+#include <unistd.h>
+
+#ifndef __arraycount
+#define __arraycount(a) (sizeof(a) / sizeof(a[0]))
+#endif
+
+void myfunc3(size_t ncalls);
+void myfunc2(size_t ncalls);
+void myfunc1(size_t origcalls, volatile size_t ncalls);
+void myfunc(size_t ncalls);
+
+static volatile int prevent_inline;
+
+void
+myfunc3(size_t ncalls)
+{
+       static const struct {
+               const char *name;
+               bool is_optional;
+       } frames[] = {
+           { "myfunc", false },
+           { "atf_body_backtrace_fmt_basic", false },
+           { "atf_test", true },
+           { "main", true },
+           { "_start", true },
+       };
+       size_t j, nptrs, min_frames, max_frames;
+       void *buffer[ncalls + 10];
+       char **strings;
+
+       min_frames = 0;
+       max_frames = 0;
+       for (j = 0; j < __arraycount(frames); ++j) {
+               if (!frames[j].is_optional)
+                       ++min_frames;
+               ++max_frames;
+       }
+       nptrs = backtrace(buffer, __arraycount(buffer));
+       ATF_REQUIRE(nptrs != (size_t)-1);
+       strings = backtrace_symbols_fmt(buffer, nptrs, "%n");
+
+       ATF_CHECK(strings != NULL);
+
+       printf("got nptrs=%zu ncalls=%zu (min_frames: %zu, max_frames: %zu)\n",
+           nptrs, ncalls, min_frames, max_frames);
+       printf("backtrace is:\n");
+       for (j = 0; j < nptrs; j++) {
+               printf("#%zu: %s\n", j, strings[j]);
+       }
+
+       ATF_REQUIRE(nptrs >= ncalls + 2 + min_frames);
+       ATF_REQUIRE(nptrs <= ncalls + 2 + max_frames);
+       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++) {
+               if (frames[i].is_optional &&
+                   strcmp(strings[j], frames[i].name)) {
+                       --i;
+                       continue;
+               }
+               ATF_CHECK_STREQ(strings[j], frames[i].name);
+       }
+
+       free(strings);
+
+       if (prevent_inline)
+               vfork();
+}
+
+void
+myfunc2(size_t ncalls)
+{
+       myfunc3(ncalls);
+
+       if (prevent_inline)
+               vfork();
+}
+
+void
+myfunc1(size_t origcalls, volatile size_t ncalls)
+{
+       if (ncalls > 1)
+               myfunc1(origcalls, ncalls - 1);
+       else
+               myfunc2(origcalls);
+
+       if (prevent_inline)
+               vfork();
+}
+
+void
+myfunc(size_t ncalls)
+{
+       myfunc1(ncalls, ncalls);
+
+       if (prevent_inline)
+               vfork();
+}
+
+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_set_md_var(tc, "require.files", "/proc/self");
+}
+
+ATF_TC_BODY(backtrace_fmt_basic, tc)
+{
+       myfunc(12);
+
+       if (prevent_inline)
+               vfork();
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+       ATF_TP_ADD_TC(tp, backtrace_fmt_basic);
+
+       return atf_no_error();
+}