Consolidate non cancellable write call

This patch consolidates all the non cancellable write calls to use
the __write_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 (write_not_cancel): Remove macro.
	(__write_nocancel): New macro.
	* sysdeps/unix/sysv/linux/not-cancel.h (__write_nocancel):
	Rewrite as a function prototype.
	(write_not_cancel): Remove macro.
	* sysdeps/unix/sysv/linux/write.c (__write_nocancel): New function.
	* gmon/gmon.c (ERR): Replace write_not_cancel with __write_nocancel.
	(write_gmon): Likewise.
	* libio/fileops.c (_IO_new_file_write): Likewise.
	* login/utmp_file.c (pututline_file): Likewise.
	(updwtmp_file): Likewise.
	* stdio-common/psiginfo.c (psiginfo): Likewise.
	* sysdeps/posix/spawni.c (__spawni_child): Likewise.
	* sysdeps/unix/sysv/linux/gethostid.c (sethostid): Likewise.
	* sysdeps/unix/sysv/linux/libc_fatal.c (backtrace_and_maps):
	Likewise.
	* sysdeps/unix/sysv/linux/pthread_setname.c (pthread_setname_np):
	Likewise.

ChangeLog

@@ -1,5 +1,24 @@
 2017-08-18  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 
+	* sysdeps/generic/not-cancel.h (write_not_cancel): Remove macro.
+	(__write_nocancel): New macro.
+	* sysdeps/unix/sysv/linux/not-cancel.h (__write_nocancel):
+	Rewrite as a function prototype.
+	(write_not_cancel): Remove macro.
+	* sysdeps/unix/sysv/linux/write.c (__write_nocancel): New function.
+	* gmon/gmon.c (ERR): Replace write_not_cancel with __write_nocancel.
+	(write_gmon): Likewise.
+	* libio/fileops.c (_IO_new_file_write): Likewise.
+	* login/utmp_file.c (pututline_file): Likewise.
+	(updwtmp_file): Likewise.
+	* stdio-common/psiginfo.c (psiginfo): Likewise.
+	* sysdeps/posix/spawni.c (__spawni_child): Likewise.
+	* sysdeps/unix/sysv/linux/gethostid.c (sethostid): Likewise.
+	* sysdeps/unix/sysv/linux/libc_fatal.c (backtrace_and_maps):
+	Likewise.
+	* sysdeps/unix/sysv/linux/pthread_setname.c (pthread_setname_np):
+	Likewise.
+
 	* sysdeps/generic/not-cancel.h (read_not_cancel): Remove macro.
 	(__read_nocancel): New macro.
 	* sysdeps/unix/sysv/linux/Versions (libc) [GLIBC_PRIVATE]: Add

gmon/gmon.c

@@ -58,7 +58,7 @@ struct gmonparam _gmonparam attribute_hidden = { GMON_PROF_OFF };
 static int	s_scale;
 #define		SCALE_1_TO_1	0x10000L
 
-#define ERR(s) write_not_cancel (STDERR_FILENO, s, sizeof (s) - 1)
+#define ERR(s) __write_nocancel (STDERR_FILENO, s, sizeof (s) - 1)
 
 void moncontrol (int mode);
 void __moncontrol (int mode);
@@ -375,7 +375,7 @@ write_gmon (void)
     memcpy (&ghdr.cookie[0], GMON_MAGIC, sizeof (ghdr.cookie));
     ghdr.version = GMON_VERSION;
     memset (ghdr.spare, '\0', sizeof (ghdr.spare));
-    write_not_cancel (fd, &ghdr, sizeof (struct gmon_hdr));
+    __write_nocancel (fd, &ghdr, sizeof (struct gmon_hdr));
 
     /* write PC histogram: */
     write_hist (fd);

libio/fileops.c

@@ -1251,7 +1251,7 @@ _IO_new_file_write (_IO_FILE *f, const void *data, _IO_ssize_t n)
     {
       _IO_ssize_t count = (__builtin_expect (f->_flags2
 					     & _IO_FLAGS2_NOTCANCEL, 0)
-			   ? write_not_cancel (f->_fileno, data, to_do)
+			   ? __write_nocancel (f->_fileno, data, to_do)
 			   : write (f->_fileno, data, to_do));
       if (count < 0)
 	{

login/utmp_file.c

@@ -444,7 +444,7 @@ pututline_file (const struct utmp *data)
     }
 
   /* Write the new data.  */
-  if (write_not_cancel (file_fd, data, sizeof (struct utmp))
+  if (__write_nocancel (file_fd, data, sizeof (struct utmp))
       != sizeof (struct utmp))
     {
       /* If we appended a new record this is only partially written.
@@ -505,7 +505,7 @@ updwtmp_file (const char *file, const struct utmp *utmp)
   /* Write the entry.  If we can't write all the bytes, reset the file
      size back to the original size.  That way, no partial entries
      will remain.  */
-  if (write_not_cancel (fd, utmp, sizeof (struct utmp))
+  if (__write_nocancel (fd, utmp, sizeof (struct utmp))
       != sizeof (struct utmp))
     {
       __ftruncate64 (fd, offset);

stdio-common/psiginfo.c

@@ -199,5 +199,5 @@ Signal generated by the completion of an I/O request");
 
   fclose (fp);
 
-  write_not_cancel (STDERR_FILENO, buf, strlen (buf));
+  __write_nocancel (STDERR_FILENO, buf, strlen (buf));
 }

sysdeps/generic/not-cancel.h

@@ -36,7 +36,7 @@
   (void) __close (fd)
 #define __read_nocancel(fd, buf, n) \
   __read (fd, buf, n)
-#define write_not_cancel(fd, buf, n) \
+#define __write_nocancel(fd, buf, n) \
   __write (fd, buf, n)
 #define writev_not_cancel_no_status(fd, iov, n) \
   (void) __writev (fd, iov, n)

sysdeps/posix/spawni.c

@@ -234,7 +234,7 @@ __spawni_child (void *arguments)
   ret = errno ? : ECHILD;
   if (ret)
     /* Since sizeof errno < PIPE_BUF, the write is atomic. */
-    while (write_not_cancel (args->pipe[1], &ret, sizeof (ret)) < 0);
+    while (__write_nocancel (args->pipe[1], &ret, sizeof (ret)) < 0);
 
   _exit (SPAWN_ERROR);
 }

sysdeps/unix/sysv/linux/gethostid.c

@@ -51,7 +51,7 @@ sethostid (long int id)
   if (fd < 0)
     return -1;
 
-  written = write_not_cancel (fd, &id32, sizeof (id32));
+  written = __write_nocancel (fd, &id32, sizeof (id32));
 
   close_not_cancel_no_status (fd);
 

sysdeps/unix/sysv/linux/libc_fatal.c

@@ -48,7 +48,7 @@ backtrace_and_maps (int do_abort, bool written, int fd)
       if (n > 2)
         {
 #define strnsize(str) str, strlen (str)
-#define writestr(str) write_not_cancel (fd, str)
+#define writestr(str) __write_nocancel (fd, str)
           writestr (strnsize ("======= Backtrace: =========\n"));
           __backtrace_symbols_fd (addrs + 1, n - 1, fd);
 
@@ -57,7 +57,7 @@ backtrace_and_maps (int do_abort, bool written, int fd)
           char buf[1024];
           ssize_t n2;
           while ((n2 = __read_nocancel (fd2, buf, sizeof (buf))) > 0)
-            if (write_not_cancel (fd, buf, n2) != n2)
+            if (__write_nocancel (fd, buf, n2) != n2)
               break;
           close_not_cancel_no_status (fd2);
         }

sysdeps/unix/sysv/linux/not-cancel.h

@@ -39,8 +39,8 @@ __typeof (__read) __read_nocancel;
 libc_hidden_proto (__read_nocancel)
 
 /* Uncancelable write.  */
-#define __write_nocancel(fd, buf, len) \
-  INLINE_SYSCALL (write, 3, fd, buf, len)
+__typeof (__write) __write_nocancel;
+libc_hidden_proto (__write_nocancel)
 
 /* Uncancelable openat.  */
 #define openat_not_cancel(fd, fname, oflag, mode) \
@@ -61,10 +61,6 @@ libc_hidden_proto (__read_nocancel)
   (void) ({ INTERNAL_SYSCALL_DECL (err);				      \
 	    INTERNAL_SYSCALL (close, err, 1, (fd)); })
 
-/* Uncancelable write.  */
-#define write_not_cancel(fd, buf, n) \
-  __write_nocancel (fd, buf, n)
-
 /* Uncancelable writev.  */
 #define writev_not_cancel_no_status(fd, iov, n) \
   (void) ({ INTERNAL_SYSCALL_DECL (err);				      \

sysdeps/unix/sysv/linux/pthread_setname.c

@@ -51,7 +51,7 @@ pthread_setname_np (pthread_t th, const char *name)
     return errno;
 
   int res = 0;
-  ssize_t n = TEMP_FAILURE_RETRY (write_not_cancel (fd, name, name_len));
+  ssize_t n = TEMP_FAILURE_RETRY (__write_nocancel (fd, name, name_len));
   if (n < 0)
     res = errno;
   else if (n != name_len)

sysdeps/unix/sysv/linux/write.c

@@ -18,6 +18,7 @@
 
 #include <unistd.h>
 #include <sysdep-cancel.h>
+#include <not-cancel.h>
 
 /* Write NBYTES of BUF to FD.  Return the number written, or -1.  */
 ssize_t
@@ -31,3 +32,14 @@ weak_alias (__libc_write, __write)
 libc_hidden_weak (__write)
 weak_alias (__libc_write, write)
 libc_hidden_weak (write)
+
+#if !IS_IN (rtld)
+ssize_t
+__write_nocancel (int fd, const void *buf, size_t nbytes)
+{
+  return INLINE_SYSCALL_CALL (write, fd, buf, nbytes);
+}
+#else
+strong_alias (__libc_write, __write_nocancel)
+#endif
+libc_hidden_def (__write_nocancel)