tests: check decoding of set_mempolicy syscall

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

diff --git a/tests/.gitignore b/tests/.gitignore
index c7be68de609e96aac82b35b535d867f5ef071aa3..ac71068c45be55d5358d7f400afd9a20c8599364 100644 (file)
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -179,6 +179,7 @@ select
 semop
 sendfile
 sendfile64
+set_mempolicy
 set_ptracer_any
 setdomainname
 setfsgid

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 67afd0fdb9a835c74bb5f31407139e2877d0e2c2..85bb9a71eec4b9a24bcf6d3a5a82af7fe4638729 100644 (file)
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -232,6 +232,7 @@ check_PROGRAMS = \
        semop \
        sendfile \
        sendfile64 \
+       set_mempolicy \
        set_ptracer_any \
        setdomainname \
        setfsgid \
@@ -501,6 +502,7 @@ DECODER_TESTS = \
        semop.test \
        sendfile.test \
        sendfile64.test \
+       set_mempolicy.test \
        setdomainname.test \
        setfsgid.test \
        setfsgid32.test \

diff --git a/tests/set_mempolicy.c b/tests/set_mempolicy.c
new file mode 100644 (file)
index 0000000..9c29489
--- /dev/null
+++ b/tests/set_mempolicy.c
@@ -0,0 +1,150 @@
+/*
+ * Check decoding of set_mempolicy 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>
+
+#ifdef __NR_set_mempolicy
+
+# include <errno.h>
+# include <stdio.h>
+# include <string.h>
+# include <unistd.h>
+
+# include "xlat.h"
+# include "xlat/policies.h"
+
+# define MAX_STRLEN 3
+# define NLONGS(n) ((n + 8 * sizeof(long) - 2) \
+                     / (8 * sizeof(long)))
+
+static void
+print_nodes(const unsigned long maxnode, unsigned int offset)
+{
+       unsigned int nlongs = NLONGS(maxnode);
+       if (nlongs <= offset)
+               nlongs = 0;
+       else
+               nlongs -= offset;
+       const unsigned int size = nlongs * sizeof(long);
+       unsigned long *const nodemask =
+               tail_alloc(size ? size : (offset ? 1 : 0));
+       memset(nodemask, 0, size);
+       (void) tail_alloc(1);
+
+       long rc = syscall(__NR_set_mempolicy, 0, nodemask, maxnode);
+       int saved_errno = errno;
+
+       fputs("set_mempolicy(MPOL_DEFAULT, ", stdout);
+
+       if (nlongs) {
+               putc('[', stdout);
+               unsigned int i;
+               for (i = 0; i < nlongs + offset; ++i) {
+                       if (i)
+                               fputs(", ", stdout);
+                       if (i < nlongs) {
+                               if (i >= MAX_STRLEN) {
+                                       fputs("...", stdout);
+                                       break;
+                               }
+                               printf("%#0*lx", (int) sizeof(long) * 2 + 2,
+                                      nodemask[i]);
+                       } else {
+                               printf("%p", nodemask + i);
+                               break;
+                       }
+               }
+               putc(']', stdout);
+       } else {
+               printf("%p", nodemask);
+       }
+
+       printf(", %lu) = ", maxnode);
+       if (rc) {
+               errno = saved_errno;
+               printf("%ld %s (%m)\n", rc, errno2name());
+       } else {
+               puts("0");
+       }
+}
+
+static void
+test_offset(const unsigned int offset)
+{
+       unsigned long maxnode = get_page_size() * 8;
+
+       print_nodes(maxnode, offset);
+       print_nodes(maxnode + 1, offset);
+       print_nodes(maxnode + 2, offset);
+
+       maxnode = sizeof(long) * 8;
+       print_nodes(0, offset);
+       print_nodes(1, offset);
+       print_nodes(2, offset);
+       print_nodes(maxnode - 1, offset);
+       print_nodes(maxnode    , offset);
+       print_nodes(maxnode + 1, offset);
+       print_nodes(maxnode + 2, offset);
+       print_nodes(maxnode * 2 - 1, offset);
+       print_nodes(maxnode * 2    , offset);
+       print_nodes(maxnode * 2 + 1, offset);
+       print_nodes(maxnode * 2 + 2, offset);
+       print_nodes(maxnode * 3 - 1, offset);
+       print_nodes(maxnode * 3    , offset);
+       print_nodes(maxnode * 3 + 1, offset);
+       print_nodes(maxnode * 3 + 2, offset);
+       print_nodes(maxnode * 4 + 2, offset);
+}
+
+int
+main(void)
+{
+       if (syscall(__NR_set_mempolicy, 0, 0, 0))
+               perror_msg_and_skip("set_mempolicy");
+       puts("set_mempolicy(MPOL_DEFAULT, NULL, 0) = 0");
+
+       const unsigned long *nodemask = (void *) 0xfacefeedfffffffe;
+       const unsigned long maxnode = (unsigned long) 0xcafef00dbadc0ded;
+       long rc = syscall(__NR_set_mempolicy, 1, nodemask, maxnode);
+       printf("set_mempolicy(MPOL_PREFERRED, %p, %lu) = %ld %s (%m)\n",
+              nodemask, maxnode, rc, errno2name());
+
+       test_offset(0);
+       test_offset(1);
+
+       puts("+++ exited with 0 +++");
+       return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_set_mempolicy")
+
+#endif

diff --git a/tests/set_mempolicy.test b/tests/set_mempolicy.test
new file mode 100755 (executable)
index 0000000..45d477b
--- /dev/null
+++ b/tests/set_mempolicy.test
@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Check set_mempolicy syscall decoding.
+
+. "${srcdir=.}/init.sh"
+run_strace_match_diff -s3 -a37