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Consolidate non cancellable openat call

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This patch consolidates all the non cancellable openat{64} calls to use
the __openat{64}_nocancel identifier.  For non cancellable targets it will
be just a macro to call the default respective symbol while on Linux
will be a internal one.

Checked on x86_64-linux-gnu, x86_64-linux-gnu-x32, and i686-linux-gnu.

	* sysdeps/generic/not-cancel.h (openat_not_cancel): Remove macro.
	(openat_not_cancel_3): Likewise.
	(openat64_not_cancel_3): Likewise).
	(openat_not_cancel_3): Likewise).
	* sysdeps/unix/sysv/linux/not-cancel.h (openat_not_cancel): Remove
	macro.
	(openat_not_cancel_3): Likewise.
	(openat64_not_cancel): Likewise.
	(openat64_not_cancel_3): Likewise.
	* sysdeps/unix/sysv/linux/openat.c (__openat_nocancel): New function.
	* sysdeps/unix/sysv/linux/openat64.c (__openat64_nocancel): Likewise.
	* io/ftw.c (open_dir_stream): Replace openat{64}_not_cancel{_3} with
	__open{64}_nocancel.
	* sysdeps/mach/hurd/opendir.c (__opendirat): Likewise.
	* sysdeps/posix/getcwd.c (__getcwd): Likewise.
	* sysdeps/posix/opendir.c (__opendirat): Likewise.
This commit is contained in:
Adhemerval Zanella 2017-07-03 15:00:26 -03:00
parent 65a086db91
commit 0bb2fabcb3
9 changed files with 87 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
ChangeLog
View File

@ -1,3 +1,22 @@
2017-08-18 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* sysdeps/generic/not-cancel.h (openat_not_cancel): Remove macro.
(openat_not_cancel_3): Likewise.
(openat64_not_cancel_3): Likewise).
(openat_not_cancel_3): Likewise).
* sysdeps/unix/sysv/linux/not-cancel.h (openat_not_cancel): Remove
macro.
(openat_not_cancel_3): Likewise.
(openat64_not_cancel): Likewise.
(openat64_not_cancel_3): Likewise.
* sysdeps/unix/sysv/linux/openat.c (__openat_nocancel): New function.
* sysdeps/unix/sysv/linux/openat64.c (__openat64_nocancel): Likewise.
* io/ftw.c (open_dir_stream): Replace openat{64}_not_cancel{_3} with
__open{64}_nocancel.
* sysdeps/mach/hurd/opendir.c (__opendirat): Likewise.
* sysdeps/posix/getcwd.c (__getcwd): Likewise.
* sysdeps/posix/opendir.c (__opendirat): Likewise.
2017-08-18 H.J. Lu <hongjiu.lu@intel.com>
[BZ #18822]

4
io/ftw.c
View File

@ -337,8 +337,8 @@ open_dir_stream (int *dfdp, struct ftw_data *data, struct dir_data *dirp)
if (dfdp != NULL && *dfdp != -1)
{
int fd = openat64_not_cancel_3 (*dfdp, data->dirbuf + data->ftw.base,
O_RDONLY | O_DIRECTORY | O_NDELAY);
int fd = __openat64_nocancel (*dfdp, data->dirbuf + data->ftw.base,
O_RDONLY | O_DIRECTORY | O_NDELAY);
dirp->stream = NULL;
if (fd != -1 && (dirp->stream = __fdopendir (fd)) == NULL)
close_not_cancel_no_status (fd);

12
sysdeps/generic/not-cancel.h
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@ -22,14 +22,10 @@
__open (__VA_ARGS__)
#define __open64_nocancel(...) \
__open64 (__VA_ARGS__)
#define openat_not_cancel(fd, name, flags, mode) \
__openat (fd, name, flags, mode)
#define openat_not_cancel_3(fd, name, flags) \
__openat (fd, name, flags, 0)
#define openat64_not_cancel(fd, name, flags, mode) \
__openat64 (fd, name, flags, mode)
#define openat64_not_cancel_3(fd, name, flags) \
__openat64 (fd, name, flags, 0)
#define __openat_nocancel(...) \
__openat (__VA_ARGS__)
#define __openat64_nocancel(...) \
__openat64 (__VA_ARGS__)
#define close_not_cancel(fd) \
__close (fd)
#define close_not_cancel_no_status(fd) \

2
sysdeps/mach/hurd/opendir.c
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@ -86,7 +86,7 @@ __opendirat (int dfd, const char *name)
assert (dfd == AT_FDCWD);
fd = __open_nocancel (name, flags);
#else
fd = openat_not_cancel_3 (dfd, name, flags);
fd = __openat_nocancel (dfd, name, flags);
#endif
if (fd < 0)
return NULL;

4
sysdeps/posix/getcwd.c
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@ -175,7 +175,7 @@ extern char *alloca ();
# include <not-cancel.h>
# include <kernel-features.h>
#else
# define openat64_not_cancel_3(dfd, name, mode) openat64 (dfd, name, mode)
# define __openat64_nocancel(dfd, name, mode) openat64 (dfd, name, mode)
# define close_not_cancel_no_status(fd) close (fd)
#endif
@ -281,7 +281,7 @@ __getcwd (char *buf, size_t size)
while (!(thisdev == rootdev && thisino == rootino))
{
if (__have_atfcts >= 0)
fd = openat64_not_cancel_3 (fd, "..", O_RDONLY | O_CLOEXEC);
fd = __openat64_nocancel (fd, "..", O_RDONLY | O_CLOEXEC);
else
fd = -1;
if (fd >= 0)

2
sysdeps/posix/opendir.c
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@ -161,7 +161,7 @@ __opendirat (int dfd, const char *name)
}
}
return opendir_tail (openat_not_cancel_3 (dfd, name, opendir_oflags));
return opendir_tail (__openat_nocancel (dfd, name, opendir_oflags));
}
#endif

18
sysdeps/unix/sysv/linux/not-cancel.h
View File

@ -34,6 +34,14 @@ libc_hidden_proto (__open_nocancel)
__typeof (open64) __open64_nocancel;
libc_hidden_proto (__open64_nocancel)
/* Non cancellable openat syscall. */
__typeof (openat) __openat_nocancel;
libc_hidden_proto (__openat_nocancel)
/* Non cacellable openat syscall (LFS version). */
__typeof (openat64) __openat64_nocancel;
libc_hidden_proto (__openat64_nocancel)
/* Non cancellable read syscall. */
__typeof (__read) __read_nocancel;
libc_hidden_proto (__read_nocancel)
@ -42,16 +50,6 @@ libc_hidden_proto (__read_nocancel)
__typeof (__write) __write_nocancel;
libc_hidden_proto (__write_nocancel)
/* Uncancelable openat. */
#define openat_not_cancel(fd, fname, oflag, mode) \
INLINE_SYSCALL (openat, 4, fd, fname, oflag, mode)
#define openat_not_cancel_3(fd, fname, oflag) \
INLINE_SYSCALL (openat, 3, fd, fname, oflag)
#define openat64_not_cancel(fd, fname, oflag, mode) \
INLINE_SYSCALL (openat, 4, fd, fname, oflag | O_LARGEFILE, mode)
#define openat64_not_cancel_3(fd, fname, oflag) \
INLINE_SYSCALL (openat, 3, fd, fname, oflag | O_LARGEFILE)
/* Uncancelable close. */
#define __close_nocancel(fd) \
INLINE_SYSCALL (close, 1, fd)

20
sysdeps/unix/sysv/linux/openat.c
View File

@ -19,6 +19,7 @@
#include <stdarg.h>
#include <sysdep-cancel.h>
#include <not-cancel.h>
#ifndef __OFF_T_MATCHES_OFF64_T
@ -43,4 +44,23 @@ weak_alias (__libc_openat, __openat)
libc_hidden_weak (__openat)
weak_alias (__libc_openat, openat)
# if !IS_IN (rtld)
int
__openat_nocancel (int fd, const char *file, int oflag, ...)
{
mode_t mode = 0;
if (__OPEN_NEEDS_MODE (oflag))
{
va_list arg;
va_start (arg, oflag);
mode = va_arg (arg, mode_t);
va_end (arg);
}
return INLINE_SYSCALL_CALL (openat, fd, file, oflag, mode);
}
# else
strong_alias (__libc_openat, __openat_nocancel)
# endif
libc_hidden_weak (__openat_nocancel)
#endif

36
sysdeps/unix/sysv/linux/openat64.c
View File

@ -19,6 +19,13 @@
#include <stdarg.h>
#include <sysdep-cancel.h>
#include <not-cancel.h>
#ifdef __OFF_T_MATCHES_OFF64_T
# define EXTRA_OPEN_FLAGS 0
#else
# define EXTRA_OPEN_FLAGS O_LARGEFILE
#endif
/* Open FILE with access OFLAG. Interpret relative paths relative to
the directory associated with FD. If OFLAG includes O_CREAT or
@ -35,12 +42,6 @@ __libc_openat64 (int fd, const char *file, int oflag, ...)
va_end (arg);
}
#ifdef __OFF_T_MATCHES_OFF64_T
# define EXTRA_OPEN_FLAGS 0
#else
# define EXTRA_OPEN_FLAGS O_LARGEFILE
#endif
return SYSCALL_CANCEL (openat, fd, file, oflag | EXTRA_OPEN_FLAGS, mode);
}
@ -48,8 +49,31 @@ strong_alias (__libc_openat64, __openat64)
libc_hidden_weak (__openat64)
weak_alias (__libc_openat64, openat64)
#if !IS_IN (rtld)
int
__openat64_nocancel (int fd, const char *file, int oflag, ...)
{
mode_t mode = 0;
if (__OPEN_NEEDS_MODE (oflag))
{
va_list arg;
va_start (arg, oflag);
mode = va_arg (arg, mode_t);
va_end (arg);
}
return INLINE_SYSCALL_CALL (openat, fd, file, oflag | EXTRA_OPEN_FLAGS,
mode);
}
#else
strong_alias (__libc_openat64, __openat64_nocancel)
#endif
libc_hidden_def (__openat64_nocancel)
#ifdef __OFF_T_MATCHES_OFF64_T
strong_alias (__libc_openat64, __openat)
libc_hidden_weak (__openat)
weak_alias (__libc_openat64, openat)
strong_alias (__openat64_nocancel, __openat_nocancel)
#endif