optimize signal mask ops. comment out "impossible" errors

    text           data     bss     dec     hex filename
-   1179             13       2    1194     4aa libc/misc/syslog/syslog.o
+   1165             13       2    1180     49c libc/misc/syslog/syslog.o
-    435              4       0     439     1b7 libc/pwd_grp/lckpwdf.o
+    393              4       0     397     18d libc/pwd_grp/lckpwdf.o
-     38              0       0      38      26 libc/signal/sigandset.o
+     32              0       0      32      20 libc/signal/sigandset.o
-     63              0       0      63      3f libc/signal/sigblock.o
+     56              0       0      56      38 libc/signal/sigblock.o
-     22              0       0      22      16 libc/signal/sigempty.o
+     20              0       0      20      14 libc/signal/sigempty.o
-     25              0       0      25      19 libc/signal/sigfillset.o
+     20              0       0      20      14 libc/signal/sigfillset.o
-     34              0       0      34      22 libc/signal/sigisempty.o
+     16              0       0      16      10 libc/signal/sigisempty.o
-     38              0       0      38      26 libc/signal/sigorset.o
+     32              0       0      32      20 libc/signal/sigorset.o
-    119              0       0     119      77 libc/signal/sigpause.o
+    113              0       0     113      71 libc/signal/sigpause.o
-    215              0       0     215      d7 libc/signal/sigset.o
+    211              0       0     211      d3 libc/signal/sigset.o
-     63              0       0      63      3f libc/signal/sigsetmask.o
+     56              0       0      56      38 libc/signal/sigsetmask.o
-    194              0       1     195      c3 libc/stdlib/abort.o
+    183              0       1     184      b8 libc/stdlib/abort.o
-    323              0       0     323     143 libc/unistd/sleep.o
+    309              0       0     309     135 libc/unistd/sleep.o

1 files changed, 8 insertions, 7 deletions

diff --git a/libpthread/linuxthreads/pthread.c b/libpthread/linuxthreads/pthread.c
index ce0e9b62c..8cc9916cf 100644
--- a/libpthread/linuxthreads/pthread.c
+++ b/libpthread/linuxthreads/pthread.c
@@ -561,9 +561,10 @@ static void pthread_initialize(void)
   /* Setup signal handlers for the initial thread.
      Since signal handlers are shared between threads, these settings
      will be inherited by all other threads. */
+  memset(&sa, 0, sizeof(sa));
   sa.sa_handler = pthread_handle_sigrestart;
-  sigemptyset(&sa.sa_mask);
-  sa.sa_flags = 0;
+  /* __sigemptyset(&sa.sa_mask); */
+  /* sa.sa_flags = 0; */
   __libc_sigaction(__pthread_sig_restart, &sa, NULL);
   sa.sa_handler = pthread_handle_sigcancel;
   sigaddset(&sa.sa_mask, __pthread_sig_restart);
@@ -571,12 +572,12 @@ static void pthread_initialize(void)
   __libc_sigaction(__pthread_sig_cancel, &sa, NULL);
   if (__pthread_sig_debug > 0) {
     sa.sa_handler = pthread_handle_sigdebug;
-    sigemptyset(&sa.sa_mask);
+    __sigemptyset(&sa.sa_mask);
     /* sa.sa_flags = 0; */
     __libc_sigaction(__pthread_sig_debug, &sa, NULL);
   }
   /* Initially, block __pthread_sig_restart. Will be unblocked on demand. */
-  sigemptyset(&mask);
+  __sigemptyset(&mask);
   sigaddset(&mask, __pthread_sig_restart);
   sigprocmask(SIG_BLOCK, &mask, NULL);
   /* And unblock __pthread_sig_cancel if it has been blocked. */
@@ -1152,7 +1153,7 @@ void __pthread_kill_other_threads_np(void)
      implementation uses since this would be passed to the new
      process.  */
   memset(&sa, 0, sizeof(sa));
-  /*sigemptyset(&sa.sa_mask);*/
+  /*__sigemptyset(&sa.sa_mask);*/
   /*sa.sa_flags = 0;*/
   if (SIG_DFL) /* if it's constant zero, it's already done too */
     sa.sa_handler = SIG_DFL;
@@ -1232,7 +1233,7 @@ __pthread_timedsuspend_old(pthread_descr self, const struct timespec *abstime)
       THREAD_SETMEM(self, p_signal_jmp, &jmpbuf);
       THREAD_SETMEM(self, p_signal, 0);
       /* Unblock the restart signal */
-      sigemptyset(&unblock);
+      __sigemptyset(&unblock);
       sigaddset(&unblock, __pthread_sig_restart);
       sigprocmask(SIG_UNBLOCK, &unblock, &initial_mask);
 
@@ -1319,7 +1320,7 @@ __pthread_timedsuspend_new(pthread_descr self, const struct timespec *abstime)
     THREAD_SETMEM(self, p_signal_jmp, &jmpbuf);
     THREAD_SETMEM(self, p_signal, 0);
     /* Unblock the restart signal */
-    sigemptyset(&unblock);
+    __sigemptyset(&unblock);
     sigaddset(&unblock, __pthread_sig_restart);
     sigprocmask(SIG_UNBLOCK, &unblock, &initial_mask);