From 3c5dbffe61577d4c85978da31c08643be15d42e6 Mon Sep 17 00:00:00 2001
From: "Dmitry V. Levin" <ldv@altlinux.org>
Date: Sat, 11 Feb 2017 13:40:42 +0000
Subject: [PATCH] tests: rewrite pipe2 syscall decoding check from match_grep
 to match_diff

Unlike pipe.test that is based on match_grep, the new test
is based on match_diff and does more rigorous testing.

* tests/pipe2.c: New file.
* tests/pipe2.test: New test.
* tests/.gitignore: Add pipe2.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add pipe2.test.
---
 tests/.gitignore  |  1 +
 tests/Makefile.am |  2 ++
 tests/pipe2.c     | 71 +++++++++++++++++++++++++++++++++++++++++++++++
 tests/pipe2.test  |  6 ++++
 4 files changed, 80 insertions(+)
 create mode 100644 tests/pipe2.c
 create mode 100755 tests/pipe2.test

diff --git a/tests/.gitignore b/tests/.gitignore
index 1765ac70..800c5999 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -211,6 +211,7 @@ perf_event_open_nonverbose
 perf_event_open_unabbrev
 personality
 pipe
+pipe2
 pkey_alloc
 pkey_free
 pkey_mprotect
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 74eca22f..311d3bb3 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -270,6 +270,7 @@ check_PROGRAMS = \
 	perf_event_open_unabbrev \
 	personality \
 	pipe \
+	pipe2 \
 	pkey_alloc \
 	pkey_free \
 	pkey_mprotect \
@@ -671,6 +672,7 @@ DECODER_TESTS = \
 	perf_event_open_unabbrev.test \
 	personality.test \
 	pipe.test \
+	pipe2.test \
 	pkey_alloc.test \
 	pkey_free.test \
 	pkey_mprotect.test \
diff --git a/tests/pipe2.c b/tests/pipe2.c
new file mode 100644
index 00000000..375ae74f
--- /dev/null
+++ b/tests/pipe2.c
@@ -0,0 +1,71 @@
+/*
+ * Check decoding of pipe2 syscall.
+ *
+ * Copyright (c) 2015-2017 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.
+ */
+
+#include "tests.h"
+#include <asm/unistd.h>
+
+#ifdef __NR_pipe2
+
+# include <fcntl.h>
+# include <stdio.h>
+# include <unistd.h>
+
+int
+main(void)
+{
+	static const kernel_ulong_t bogus_zero =
+		(kernel_ulong_t) 0xffffffff00000000ULL;
+	int *const fds = tail_alloc(sizeof(*fds) * 2);
+	int *const efault = fds + 1;
+	long rc;
+
+	rc = syscall(__NR_pipe2, fds, bogus_zero | O_NONBLOCK);
+	if (rc)
+		perror_msg_and_skip("pipe2");
+	printf("pipe2([%d, %d], O_NONBLOCK) = 0\n", fds[0], fds[1]);
+
+	rc = syscall(__NR_pipe2, efault, bogus_zero);
+	printf("pipe2(%p, 0) = %s\n", efault, sprintrc(rc));
+
+	if (F8ILL_KULONG_SUPPORTED) {
+		const kernel_ulong_t ill = f8ill_ptr_to_kulong(fds);
+		rc = syscall(__NR_pipe2, ill, 0);
+		printf("pipe2(%#llx, 0) = %s\n",
+		       (unsigned long long) ill, sprintrc(rc));
+	}
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_pipe2")
+
+#endif
diff --git a/tests/pipe2.test b/tests/pipe2.test
new file mode 100755
index 00000000..aff6cd44
--- /dev/null
+++ b/tests/pipe2.test
@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Check decoding of pipe2 syscall.
+. "${srcdir=.}/init.sh"
+
+run_strace_match_diff -a15
-- 
2.50.1