GNU C Library master sources branch master updated. glibc-2.26.9000-766-g1ba1d8a

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- Log -----------------------------------------------------------------
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=1ba1d8a44d244110c1f8d768f098ac44351acb76

commit 1ba1d8a44d244110c1f8d768f098ac44351acb76
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Mon Nov 6 09:31:37 2017 -0200

    Optimize sigrelse implementation
    
    This patch simplifies sighold a bit by removing an extra sigprocmask
    and using SIG_BLOCK (which union of the current set and the set argument).
    
    Checked on x86_64-linux-gnu.
    
    	* signal/sighold.c (sighold): Optimize implementation.
    
    Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

diff --git a/ChangeLog b/ChangeLog
index 6f10dd9..88f3ac8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 2017-11-15  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 
+	* signal/sigrelse.c (sigrelse): Optimize implementation.
+
 	* sysdeps/posix/sigpause.c (do_sigpause): Remove.
 	(__sigpause): Rely on __sigsuspend to implement single thread
 	optimization.  Add LIBC_CANCEL_HANDLED for cancellation marking.
diff --git a/signal/sigrelse.c b/signal/sigrelse.c
index e41c2bd..61f240b 100644
--- a/signal/sigrelse.c
+++ b/signal/sigrelse.c
@@ -26,14 +26,8 @@ sigrelse (int sig)
 {
   sigset_t set;
 
-  /* Retrieve current signal set.  */
-  if (__sigprocmask (SIG_SETMASK, NULL, &set) < 0)
+  sigemptyset (&set);
+  if (sigaddset (&set, sig) < 0)
     return -1;
-
-  /* Remove the specified signal.  */
-  if (sigdelset (&set, sig) < 0)
-    return -1;
-
-  /* Set the new mask.  */
-  return __sigprocmask (SIG_SETMASK, &set, NULL);
+  return __sigprocmask (SIG_UNBLOCK, &set, NULL);
 }

http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=ad4f43a2344864ae2304060dcc722a7a63bad1b4

commit ad4f43a2344864ae2304060dcc722a7a63bad1b4
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Fri Nov 3 10:55:09 2017 -0200

    Cleanup sigpause implementation
    
    This patch simplify sigpause by remobing the single thread optimization
    since it will be handled already by the __sigsuspend call.
    
    Checked on x86_64-linux-gnu.
    
    	* sysdeps/posix/sigpause.c (do_sigpause): Remove.
    	(__sigpause): Rely on __sigsuspend to implement single thread
    	optimization.  Add LIBC_CANCEL_HANDLED for cancellation marking.
    
    Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
    Reviewed-by: Zack Weinberg <zackw@panix.com>

diff --git a/ChangeLog b/ChangeLog
index b63fa4f..6f10dd9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2017-11-15  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
+
+	* sysdeps/posix/sigpause.c (do_sigpause): Remove.
+	(__sigpause): Rely on __sigsuspend to implement single thread
+	optimization.  Add LIBC_CANCEL_HANDLED for cancellation marking.
+
 2017-11-15  Joseph Myers  <joseph@codesourcery.com>
 
 	* scripts/build-many-glibcs.py (Context.checkout): Default Linux
diff --git a/sysdeps/posix/sigpause.c b/sysdeps/posix/sigpause.c
index 9038ed3..a61e056 100644
--- a/sysdeps/posix/sigpause.c
+++ b/sysdeps/posix/sigpause.c
@@ -19,15 +19,13 @@
 #include <errno.h>
 #include <signal.h>
 #include <stddef.h>		/* For NULL.  */
-#include <sysdep-cancel.h>
 #undef sigpause
 
 #include <sigset-cvt-mask.h>
+#include <sysdep-cancel.h>
 
-/* Set the mask of blocked signals to MASK,
-   wait for a signal to arrive, and then restore the mask.  */
-static int
-do_sigpause (int sig_or_mask, int is_sig)
+int
+__sigpause (int sig_or_mask, int is_sig)
 {
   sigset_t set;
 
@@ -46,21 +44,6 @@ do_sigpause (int sig_or_mask, int is_sig)
      to do anything here.  */
   return __sigsuspend (&set);
 }
-
-int
-__sigpause (int sig_or_mask, int is_sig)
-{
-  if (SINGLE_THREAD_P)
-    return do_sigpause (sig_or_mask, is_sig);
-
-  int oldtype = LIBC_CANCEL_ASYNC ();
-
-  int result = do_sigpause (sig_or_mask, is_sig);
-
-  LIBC_CANCEL_RESET (oldtype);
-
-  return result;
-}
 libc_hidden_def (__sigpause)
 
 /* We have to provide a default version of this function since the
@@ -87,3 +70,6 @@ __xpg_sigpause (int sig)
   return __sigpause (sig, 1);
 }
 strong_alias (__xpg_sigpause, __libc___xpg_sigpause)
+
+/* __sigsuspend handles cancellation.  */
+LIBC_CANCEL_HANDLED ();

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                |    8 ++++++++
 signal/sigrelse.c        |   12 +++---------
 sysdeps/posix/sigpause.c |   26 ++++++--------------------
 3 files changed, 17 insertions(+), 29 deletions(-)


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