tests: add fork-f.test and vfork-f.test

Check how strace -f follows fork and vfork syscalls.

* tests/fork-f.c: New file.
* tests/fork-f.test: New test.
* tests/vfork-f.c: New file.
* tests/vfork-f.test: New test.
* tests/Makefile.am (check_PROGRAMS): Add fork-f and vfork-f.
(TESTS): Add fork-f.test and vfork-f.test.
* tests/.gitignore: Add fork-f and vfork-f.

6 files changed, 233 insertions, 0 deletions

diff --git a/tests/.gitignore b/tests/.gitignore
index b4d1df9a..1891eeec 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -21,6 +21,7 @@ fcntl
 fcntl64
 file_handle
 filter-unavailable
+fork-f
 fstat
 fstat64
 fstatat64
@@ -102,6 +103,7 @@ unix-pair-send-recv
 userfaultfd
 utime
 utimensat
+vfork-f
 wait
 xattr
 xet_robust_list
diff --git a/tests/Makefile.am b/tests/Makefile.am
index c54fdf34..6c8f07c9 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -56,6 +56,7 @@ check_PROGRAMS = \
 	fcntl64 \
 	file_handle \
 	filter-unavailable \
+	fork-f \
 	fstat \
 	fstat64 \
 	fstatat64 \
@@ -136,6 +137,7 @@ check_PROGRAMS = \
 	userfaultfd \
 	utime \
 	utimensat \
+	vfork-f \
 	wait \
 	xattr \
 	xet_robust_list \
@@ -184,6 +186,7 @@ TESTS = \
 	fcntl64.test \
 	file_handle.test \
 	filter-unavailable.test \
+	fork-f.test \
 	fstat.test \
 	fstat64.test \
 	fstatat64.test \
@@ -260,6 +263,7 @@ TESTS = \
 	userfaultfd.test \
 	utime.test \
 	utimensat.test \
+	vfork-f.test \
 	wait.test \
 	xattr.test \
 	xet_robust_list.test \
diff --git a/tests/fork-f.c b/tests/fork-f.c
new file mode 100644
index 00000000..a1a45b9e
--- /dev/null
+++ b/tests/fork-f.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
+ * All rights reserved.
+ *
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/wait.h>
+
+static int
+logit(const char *const str)
+{
+	return pwrite(-1, str, strlen(str), 0) >= 0;
+}
+
+int main(int ac, char **av, char **ep)
+{
+	if (ac < 1)
+		return 1;
+	if (ac > 1)
+		return logit(av[1]);
+
+	logit("start");
+
+	int fds[2];
+	(void) close(0);
+	if (pipe(fds)) {
+		perror("pipe");
+		return 77;
+	}
+
+	pid_t pid = fork();
+
+	if (pid < 0) {
+		perror("fork");
+		return 77;
+	}
+
+	if (!pid) {
+		close(fds[1]);
+
+		if (read(0, fds, sizeof(int)))
+			_exit(2);
+
+		char *const args[] = { av[0], (char *) "exec", NULL };
+		if (logit("child") || execve(args[0], args, args + 1))
+			_exit(2);
+	}
+
+	close(0);
+
+	logit("parent");
+	close(fds[1]);
+
+	int status;
+	if (wait(&status) != pid) {
+		perror("wait");
+		return 77;
+	}
+	if (status) {
+		fprintf(stderr, "status = %d\n", status);
+		return 77;
+	}
+
+	logit("finish");
+
+	pid_t ppid = getpid();
+	close(-1);
+	printf("%-5d pwrite64(-1, \"start\", 5, 0) = -1 EBADF (%m)\n"
+	       "%-5d pwrite64(-1, \"parent\", 6, 0) = -1 EBADF (%m)\n"
+	       "%-5d pwrite64(-1, \"child\", 5, 0) = -1 EBADF (%m)\n"
+	       "%-5d pwrite64(-1, \"exec\", 4, 0) = -1 EBADF (%m)\n"
+	       "%-5d pwrite64(-1, \"finish\", 6, 0) = -1 EBADF (%m)\n",
+	       ppid, ppid, pid, pid, ppid);
+	return 0;
+}
diff --git a/tests/fork-f.test b/tests/fork-f.test
new file mode 100755
index 00000000..8fdf062e
--- /dev/null
+++ b/tests/fork-f.test
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# Check how strace -f follows fork syscall.
+
+. "${srcdir=.}/init.sh"
+
+run_prog > /dev/null
+OUT="$LOG.out"
+run_strace -a32 -qq -f -epwrite64 -esignal=none $args > "$OUT"
+match_diff "$LOG" "$OUT"
+rm -f "$OUT"
+
+exit 0
diff --git a/tests/vfork-f.c b/tests/vfork-f.c
new file mode 100644
index 00000000..6a7cce49
--- /dev/null
+++ b/tests/vfork-f.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
+ * All rights reserved.
+ *
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/wait.h>
+
+static inline int
+logit(const char *const str)
+{
+	return pwrite(-1, str, strlen(str), 0) >= 0;
+}
+
+int main(int ac, char **av, char **ep)
+{
+	if (ac < 1)
+		return 1;
+	if (ac > 1) {
+		if (read(0, &ac, sizeof(int)))
+			return 2;
+		return logit(av[1]);
+	}
+
+	logit("start");
+
+	int fds[2];
+	(void) close(0);
+	if (pipe(fds)) {
+		perror("pipe");
+		return 77;
+	}
+	if (fcntl(fds[1], F_SETFD, FD_CLOEXEC)) {
+		perror("fcntl");
+		return 77;
+	}
+
+	char *const args[] = { av[0], (char *) "exec", NULL };
+	pid_t pid = vfork();
+
+	if (pid < 0) {
+		perror("vfork");
+		return 77;
+	}
+
+	if (!pid) {
+		if (logit("child") || execve(args[0], args, args + 1))
+			_exit(2);
+	}
+
+	close(0);
+
+	logit("parent");
+	close(fds[1]);
+
+	int status;
+	if (wait(&status) != pid) {
+		perror("wait");
+		return 77;
+	}
+	if (status) {
+		fprintf(stderr, "status = %d\n", status);
+		return 77;
+	}
+
+	logit("finish");
+
+	pid_t ppid = getpid();
+	close(-1);
+	printf("%-5d pwrite64(-1, \"start\", 5, 0) = -1 EBADF (%m)\n"
+	       "%-5d pwrite64(-1, \"child\", 5, 0) = -1 EBADF (%m)\n"
+	       "%-5d pwrite64(-1, \"parent\", 6, 0) = -1 EBADF (%m)\n"
+	       "%-5d pwrite64(-1, \"exec\", 4, 0) = -1 EBADF (%m)\n"
+	       "%-5d pwrite64(-1, \"finish\", 6, 0) = -1 EBADF (%m)\n",
+	       ppid, pid, ppid, pid, ppid);
+	return 0;
+}
diff --git a/tests/vfork-f.test b/tests/vfork-f.test
new file mode 100755
index 00000000..ff4422b2
--- /dev/null
+++ b/tests/vfork-f.test
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+# Check how strace -f follows vfork syscall.
+
+. "${srcdir=.}/fork-f.test"