[08/14] Consolidate non cancellable waitpid call

Message ID 1501765874-6201-9-git-send-email-adhemerval.zanella@linaro.org
State New
Headers show
Series
  • Untitled series #3164
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Commit Message

Adhemerval Zanella Aug. 3, 2017, 1:11 p.m.
This patch consolidates all the non cancellable waitpid calls to use
the __waitpid_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.

	* login/utmp_file.c (timeout_handler): Replace fcntl_not_cancel with
	__fcntl_nocancel.
	* sysdeps/generic/not-cancel.h (fcntl_not_cancel): Remove macro.
	* sysdeps/unix/sysv/linux/not-cancel.h (fcntl_not_cancel): Likewise.
	* sysdeps/unix/sysv/linux/waitpid.c (__waitpid_nocancel): New symbol.
---
 libio/iopopen.c                      |  2 +-
 sysdeps/generic/not-cancel.h         |  2 +-
 sysdeps/unix/sysv/linux/not-cancel.h |  7 +++----
 sysdeps/unix/sysv/linux/waitpid.c    | 15 ++++++++++++++-
 4 files changed, 19 insertions(+), 7 deletions(-)

-- 
2.7.4

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diff --git a/libio/iopopen.c b/libio/iopopen.c
index 0c20cbb..a2ddebb 100644
--- a/libio/iopopen.c
+++ b/libio/iopopen.c
@@ -61,7 +61,7 @@  extern int _IO_dup2 (int fd, int fd2) __THROW;
 
 #ifndef _IO_waitpid
 #ifdef _LIBC
-#define _IO_waitpid waitpid_not_cancel
+#define _IO_waitpid __waitpid_nocancel
 #else
 #define _IO_waitpid waitpid
 #endif
diff --git a/sysdeps/generic/not-cancel.h b/sysdeps/generic/not-cancel.h
index cf84550..3f924c8 100644
--- a/sysdeps/generic/not-cancel.h
+++ b/sysdeps/generic/not-cancel.h
@@ -36,7 +36,7 @@ 
   __write (fd, buf, n)
 #define __writev_nocancel_nostatus(fd, iov, n) \
   (void) __writev (fd, iov, n)
-# define waitpid_not_cancel(pid, stat_loc, options) \
+# define __waitpid_nocancel(pid, stat_loc, options) \
   __waitpid (pid, stat_loc, options)
 #define pause_not_cancel() \
   __pause ()
diff --git a/sysdeps/unix/sysv/linux/not-cancel.h b/sysdeps/unix/sysv/linux/not-cancel.h
index 8f567d3..ad46d62 100644
--- a/sysdeps/unix/sysv/linux/not-cancel.h
+++ b/sysdeps/unix/sysv/linux/not-cancel.h
@@ -25,6 +25,7 @@ 
 #include <errno.h>
 #include <unistd.h>
 #include <sys/syscall.h>
+#include <sys/wait.h>
 
 /* Non cancellable open syscall.  */
 __typeof (open) __open_nocancel;
@@ -73,10 +74,8 @@  __writev_nocancel_nostatus (int fd, const struct iovec *iov, int iovcnt)
 }
 
 /* Uncancelable waitpid.  */
-#define __waitpid_nocancel(pid, stat_loc, options) \
-  INLINE_SYSCALL (wait4, 4, pid, stat_loc, options, NULL)
-#define waitpid_not_cancel(pid, stat_loc, options) \
-  __waitpid_nocancel(pid, stat_loc, options)
+__typeof (waitpid) __waitpid_nocancel;
+libc_hidden_proto (__waitpid_nocancel)
 
 /* Uncancelable pause.  */
 #define pause_not_cancel() \
diff --git a/sysdeps/unix/sysv/linux/waitpid.c b/sysdeps/unix/sysv/linux/waitpid.c
index 2fed421..052462d 100644
--- a/sysdeps/unix/sysv/linux/waitpid.c
+++ b/sysdeps/unix/sysv/linux/waitpid.c
@@ -16,10 +16,12 @@ 
    <http://www.gnu.org/licenses/>.  */
 
 #include <errno.h>
-#include <sysdep-cancel.h>
 #include <stdlib.h>
 #include <sys/wait.h>
 
+#include <sysdep-cancel.h>
+#include <not-cancel.h>
+
 __pid_t
 __waitpid (__pid_t pid, int *stat_loc, int options)
 {
@@ -31,3 +33,14 @@  __waitpid (__pid_t pid, int *stat_loc, int options)
 }
 libc_hidden_def (__waitpid)
 weak_alias (__waitpid, waitpid)
+
+__pid_t
+__waitpid_nocancel (__pid_t pid, int *stat_loc, int options)
+{
+#ifdef __NR_waitpid
+  return INLINE_SYSCALL_CALL (waitpid, pid, stat_loc, options);
+#else
+  return INLINE_SYSCALL_CALL (wait4, pid, stat_loc, options, NULL);
+#endif
+}
+libc_hidden_def (__waitpid_nocancel)