From: Dmitry V. Levin <ldv@altlinux.org>
Date: Fri, 22 Apr 2016 20:37:19 +0000 (+0000)
Subject: tests: extend test coverage of mmap syscall
X-Git-Tag: v4.12~301
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=3797d10e827c1ac4da5d0c42c1f7751e29675d34;p=strace

tests: extend test coverage of mmap syscall

Check decoding of "old mmap" edition of mmap syscall
on those architectures that define it.

* tests/old_mmap.c: New file.
* tests/old_mmap.test: New test.
* tests/.gitignore: Add old_mmap.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add old_mmap.test.
---

diff --git a/tests/.gitignore b/tests/.gitignore
index f7fbbb3b..5b3cb430 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -120,6 +120,7 @@ net-yy-unix
 netlink_inet_diag
 netlink_unix_diag
 newfstatat
+old_mmap
 oldselect
 open
 openat
diff --git a/tests/Makefile.am b/tests/Makefile.am
index b9dcae09..e16b327c 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -171,6 +171,7 @@ check_PROGRAMS = \
 	netlink_inet_diag \
 	netlink_unix_diag \
 	newfstatat \
+	old_mmap \
 	oldselect \
 	open \
 	openat \
@@ -419,6 +420,7 @@ DECODER_TESTS = \
 	net-yy-unix.test \
 	net.test \
 	newfstatat.test \
+	old_mmap.test \
 	oldselect.test \
 	open.test \
 	openat.test \
diff --git a/tests/old_mmap.c b/tests/old_mmap.c
new file mode 100644
index 00000000..c9e802de
--- /dev/null
+++ b/tests/old_mmap.c
@@ -0,0 +1,99 @@
+/*
+ * Check decoding of "old mmap" edition of mmap syscall.
+ *
+ * Copyright (c) 2016 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 <sys/syscall.h>
+
+/*
+ * On s390x, this is the mmap syscall used by glibc, so,
+ * from one side, it's already covered by another test, and, from another side,
+ * it would require additional efforts to filter out mmap calls made by glibc.
+ */
+
+#if defined __NR_mmap && \
+(   defined __arm__ \
+ || defined __i386__ \
+ || defined __m68k__ \
+ || (defined __s390__ && !defined __s390x__) \
+)
+
+# include <stdio.h>
+# include <string.h>
+# include <sys/mman.h>
+# include <unistd.h>
+
+int
+main(void)
+{
+	const unsigned int args1_c[6] = {
+		0xdeadbeef,		/* addr */
+		0xfacefeed,		/* len */
+		PROT_READ|PROT_EXEC,	/* prot */
+		MAP_FILE|MAP_FIXED,	/* flags */
+		-2U,			/* fd */
+		0xbadc0ded		/* offset */
+	};
+	const unsigned int page_size = get_page_size();
+	const unsigned int args2_c[6] = {
+		0,
+		page_size,
+		PROT_READ|PROT_WRITE,
+		MAP_PRIVATE|MAP_ANONYMOUS,
+		-1U,
+		0xfaced000 & -page_size
+	};
+	void *args = tail_memdup(args1_c, sizeof(args1_c));
+
+	long rc = syscall(__NR_mmap, args);
+	printf("mmap(%#x, %u, PROT_READ|PROT_EXEC, MAP_FILE|MAP_FIXED"
+	       ", %d, %#x) = %ld %s (%m)\n",
+	       args1_c[0], args1_c[1], args1_c[4], args1_c[5],
+	       rc, errno2name());
+
+	memcpy(args, args2_c, sizeof(args2_c));
+	rc = syscall(__NR_mmap, args);
+	printf("mmap(NULL, %u, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS"
+	       ", %d, %#x) = %#lx\n",
+	       args2_c[1], args2_c[4], args2_c[5], rc);
+
+	void *addr = (void *) rc;
+	if (mprotect(addr, page_size, PROT_NONE))
+		perror_msg_and_fail("mprotect(%p, %u, PROT_NONE)",
+				    addr, page_size);
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_mmap && (__arm__ || __i386__ || __m68k__"
+		    " || (__s390__ && !__s390x__))")
+
+#endif
diff --git a/tests/old_mmap.test b/tests/old_mmap.test
new file mode 100755
index 00000000..07fb44a2
--- /dev/null
+++ b/tests/old_mmap.test
@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Check decoding of "old mmap" edition of mmap syscall.
+
+. "${srcdir=.}/init.sh"
+run_strace_match_diff -e trace=mmap