[PATCH v7] Implement decoding of ustat syscall
JingPiao Chen
chenjingpiao at gmail.com
Fri Jan 13 14:01:41 UTC 2017
* ustat.c: New file.
* configure.ac (AC_CHECK_HEADERS): Add ustat.h.
* Makefile.am (strace_SOURCES): Add it.
* linux/dummy.h: Remove.
* tests/ustat.c: New file.
* tests/ustat.test: New test.
* tests/.gitignore: Add ustat.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add ustat.test.
---
Makefile.am | 1 +
configure.ac | 1 +
linux/dummy.h | 1 -
tests/.gitignore | 1 +
tests/Makefile.am | 2 ++
tests/ustat.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
tests/ustat.test | 6 ++++
ustat.c | 56 ++++++++++++++++++++++++++++++++++++
8 files changed, 152 insertions(+), 1 deletion(-)
create mode 100644 tests/ustat.c
create mode 100755 tests/ustat.test
create mode 100644 ustat.c
diff --git a/Makefile.am b/Makefile.am
index 3369e1e..f50e311 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -247,6 +247,7 @@ strace_SOURCES = \
umount.c \
uname.c \
userfaultfd.c \
+ ustat.c \
util.c \
utime.c \
utimes.c \
diff --git a/configure.ac b/configure.ac
index 8fc35a8..9b7ce19 100644
--- a/configure.ac
+++ b/configure.ac
@@ -396,6 +396,7 @@ AC_CHECK_HEADERS(m4_normalize([
sys/shm.h
sys/signalfd.h
sys/xattr.h
+ ustat.h
]))
AC_CHECK_HEADERS([asm/sigcontext.h],,, [#include <signal.h>])
diff --git a/linux/dummy.h b/linux/dummy.h
index 0aee35b..2758cfb 100644
--- a/linux/dummy.h
+++ b/linux/dummy.h
@@ -156,7 +156,6 @@
#define sys_timerfd printargs
#define sys_tuxcall printargs
#define sys_ulimit printargs
-#define sys_ustat printargs
#define sys_vserver printargs
/* deprecated */
diff --git a/tests/.gitignore b/tests/.gitignore
index cec446e..f0c9e93 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -357,6 +357,7 @@ unlink
unlinkat
unshare
userfaultfd
+ustat
utime
utimensat
utimes
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 8c7cdd0..d1c13d8 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -414,6 +414,7 @@ check_PROGRAMS = \
unlinkat \
unshare \
userfaultfd \
+ ustat \
utime \
utimensat \
utimes \
@@ -800,6 +801,7 @@ DECODER_TESTS = \
unlinkat.test \
unshare.test \
userfaultfd.test \
+ ustat.test \
utime.test \
utimensat.test \
utimes.test \
diff --git a/tests/ustat.c b/tests/ustat.c
new file mode 100644
index 0000000..0b17aee
--- /dev/null
+++ b/tests/ustat.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2017 JingPiao Chen <chenjingpiao at gmail.com>
+ * 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_ustat
+
+# include <stdio.h>
+# include <sys/stat.h>
+# include <sys/sysmacros.h>
+# include <unistd.h>
+# ifdef HAVE_USTAT_H
+# include <ustat.h>
+# else
+# include <stdint.h>
+struct ustat {
+ int32_t f_tfree;
+ uint64_t f_tinode;
+};
+# endif
+
+int
+main(void)
+{
+ kernel_ulong_t magic = (kernel_ulong_t) 0xfacefeedffffffff;
+ unsigned int dev = (unsigned int) magic;
+ struct ustat *ust = tail_alloc(sizeof(*ust));
+ struct stat st;
+
+ long rc = syscall(__NR_ustat, magic, 0);
+ printf("ustat(makedev(%u, %u), NULL) = %s\n",
+ major(dev), minor(dev), sprintrc(rc));
+
+ rc = syscall(__NR_ustat, magic, ust);
+ printf("ustat(makedev(%u, %u), %p) = %s\n",
+ major(dev), minor(dev), ust, sprintrc(rc));
+
+ if (stat(".", &st) == -1)
+ perror_msg_and_fail("stat");
+ dev = (unsigned int) st.st_dev;
+ rc = syscall(__NR_ustat, dev, ust);
+ if (rc == -1)
+ printf("ustat(makedev(%u, %u), %p) = %s\n",
+ major(dev), minor(dev), ust, sprintrc(rc));
+ else
+ printf("ustat(makedev(%u, %u)"
+ ", {f_tfree=%llu, f_tinode=%llu}) = %s\n",
+ major(dev), minor(dev),
+ zero_extend_signed_to_ull(ust->f_tfree),
+ zero_extend_signed_to_ull(ust->f_tinode), sprintrc(rc));
+
+ puts("+++ exited with 0 +++");
+ return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_ustat")
+
+#endif
diff --git a/tests/ustat.test b/tests/ustat.test
new file mode 100755
index 0000000..e6c800d
--- /dev/null
+++ b/tests/ustat.test
@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Check ustat syscall decoding.
+
+. "${srcdir=.}/init.sh"
+run_strace_match_diff -a36
diff --git a/ustat.c b/ustat.c
new file mode 100644
index 0000000..bf5f84a
--- /dev/null
+++ b/ustat.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2017 JingPiao Chen <chenjingpiao at gmail.com>
+ * 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 "defs.h"
+#include DEF_MPERS_TYPE(struct_ustat)
+#ifdef HAVE_USTAT_H
+# include <ustat.h>
+#else
+struct ustat {
+ int32_t f_tfree;
+ uint64_t f_tinode;
+};
+#endif
+typedef struct ustat struct_ustat;
+#include MPERS_DEFS
+
+SYS_FUNC(ustat)
+{
+ if (entering(tcp))
+ print_dev_t((unsigned int) tcp->u_arg[0]);
+ else {
+ struct_ustat ust;
+
+ tprints(", ");
+ if (!umove_or_printaddr(tcp, tcp->u_arg[1], &ust))
+ tprintf("{f_tfree=%llu, f_tinode=%llu}",
+ zero_extend_signed_to_ull(ust.f_tfree),
+ zero_extend_signed_to_ull(ust.f_tinode));
+ }
+
+ return 0;
+}
--
1.9.1
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