[RFA] make gdb.base/sigall.c more robust

[dje@google.com (Doug Evans)]

One environment in which I run the gdb testsuite has a few signals blocked
at the start.  If tcl/expect/bash had the ability to unblock signals it might
be preferable to unblock the signals there (I couldn't find any),
but OTOH testcases should be reasonably robust.

2008-01-17  Doug Evans  <dje@google.com>

	* gdb.base/sigall.c (main): Ensure all signals aren't blocked.

Index: sigall.c
===================================================================
RCS file: /cvs/src/src/gdb/testsuite/gdb.base/sigall.c,v
retrieving revision 1.1.1.2
diff -u -p -u -p -r1.1.1.2 sigall.c
--- sigall.c	28 Jun 1999 16:04:02 -0000	1.1.1.2
+++ sigall.c	17 Jan 2008 23:18:55 -0000
@@ -1581,6 +1581,18 @@ main ()
   set_debug_traps ();
   breakpoint ();
 #endif
+
+#ifdef SIG_SETMASK
+  /* Ensure all the signals aren't blocked.
+     The environment in which the testsuite is run may have blocked some
+     for whatever reason.  */
+  {
+    sigset_t newset;
+    sigemptyset (&newset);
+    sigprocmask (SIG_SETMASK, &newset, NULL);
+  }
+#endif
+
   signal (SIGABRT, handle_ABRT);
 #ifdef SIGHUP
   signal (SIGHUP, handle_HUP);