git: df1ea5887326 - main - tests: Test libexecinfo backtrace call througth signal trampoline

[Dmitry Chagin]

The branch main has been updated by dchagin:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=df1ea5887326103f0cc1445ab42fce528b474030

commit df1ea5887326103f0cc1445ab42fce528b474030
Author:     Dmitry Chagin <dcha...@freebsd.org>
AuthorDate: 2023-07-28 09:10:27 +0000
Commit:     Dmitry Chagin <dcha...@freebsd.org>
CommitDate: 2023-07-28 09:10:27 +0000

    tests: Test libexecinfo backtrace call througth signal trampoline
    
    It should fails on Aarch64 until https://reviews.llvm.org/D155066
    is not merged.
    
    Reviewed by:
    Differential Revision:  https://reviews.freebsd.org/D41129
---
 lib/libexecinfo/tests/Makefile        |  3 ++
 lib/libexecinfo/tests/sigtramp_test.c | 75 +++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+)

diff --git a/lib/libexecinfo/tests/Makefile b/lib/libexecinfo/tests/Makefile
index da34964c5005..7b90029fe354 100644
--- a/lib/libexecinfo/tests/Makefile
+++ b/lib/libexecinfo/tests/Makefile
@@ -14,7 +14,10 @@ STRIP=
 # so that doesn't seem useful.
 NETBSD_ATF_TESTS_C+=   backtrace_test
 
+ATF_TESTS_C+=          sigtramp_test
+
 LIBADD.backtrace_test+=        execinfo
+LIBADD.sigtramp_test+= execinfo
 
 .include <netbsd-tests.test.mk>
 
diff --git a/lib/libexecinfo/tests/sigtramp_test.c 
b/lib/libexecinfo/tests/sigtramp_test.c
new file mode 100644
index 000000000000..cd3b3cc418de
--- /dev/null
+++ b/lib/libexecinfo/tests/sigtramp_test.c
@@ -0,0 +1,75 @@
+/*-
+ * Copyright (c) 2023 Dmitry Chagin <dcha...@freebsd.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/wait.h>
+
+#include <execinfo.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <atf-c.h>
+
+#define        BT_FUNCTIONS            10
+
+void   handler(int);
+
+__noinline void
+handler(int signum __unused)
+{
+       void *addresses[BT_FUNCTIONS];
+       char **symbols;
+       size_t n, i, match;
+
+       n = backtrace(addresses, nitems(addresses));
+       ATF_REQUIRE(n > 1);
+       symbols = backtrace_symbols(addresses, n);
+       ATF_REQUIRE(symbols != NULL);
+
+       match = -1;
+       for (i = 0; i < n; i++) {
+               printf("%zu: %p, %s\n", i, addresses[i], symbols[i]);
+               if (strstr(symbols[i], "<main+") != NULL)
+                       match = i;
+       }
+       ATF_REQUIRE(match > 0);
+       printf("match at %zu, symbols %zu\n", match, n);
+
+}
+
+ATF_TC_WITHOUT_HEAD(test_backtrace_sigtramp);
+ATF_TC_BODY(test_backtrace_sigtramp, tc)
+{
+       struct sigaction act;
+       pid_t child;
+       int status;
+
+       memset(&act, 0, sizeof(act));
+       act.sa_handler = handler;
+       sigemptyset(&act.sa_mask);
+       sigaction(SIGUSR1, &act, NULL);
+
+       child = fork();
+       ATF_REQUIRE(child != -1);
+
+       if (child == 0) {
+               kill(getppid(), SIGUSR1);
+               _exit(0);
+       } else
+               wait(&status);
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+       ATF_TP_ADD_TC(tp, test_backtrace_sigtramp);
+
+       return (atf_no_error());
+}