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 f7fbbb3..5b3cb43 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -120,6 +120,7 @@
netlink_inet_diag
netlink_unix_diag
newfstatat
+old_mmap
oldselect
open
openat
diff --git a/tests/Makefile.am b/tests/Makefile.am
index b9dcae0..e16b327 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -171,6 +171,7 @@
netlink_inet_diag \
netlink_unix_diag \
newfstatat \
+ old_mmap \
oldselect \
open \
openat \
@@ -419,6 +420,7 @@
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 0000000..c9e802d
--- /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 0000000..07fb44a
--- /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
