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[external/binutils.git] / gdb / testsuite / gdb.base / sigstep.c

diff --git a/gdb/testsuite/gdb.base/sigstep.c b/gdb/testsuite/gdb.base/sigstep.c
index 9555bee..001a288 100644 (file)
--- a/gdb/testsuite/gdb.base/sigstep.c
+++ b/gdb/testsuite/gdb.base/sigstep.c
@@ -1,20 +1,19 @@
 /* This testcase is part of GDB, the GNU debugger.
 
-   Copyright 2004 Free Software Foundation, Inc.
+   Copyright 2004, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
+   the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
- 
+
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 */
 
@@ -22,6 +21,7 @@
 #include <string.h>
 #include <signal.h>
 #include <sys/time.h>
+#include <errno.h>
 
 static volatile int done;
 
@@ -31,27 +31,52 @@ handler (int sig)
   done = 1;
 } /* handler */
 
+struct itimerval itime;
+struct sigaction action;
+
+/* The enum is so that GDB can easily see these macro values.  */
+enum {
+  itimer_real = ITIMER_REAL,
+  itimer_virtual = ITIMER_VIRTUAL
+} itimer = ITIMER_VIRTUAL;
+
+int
 main ()
 {
+
+  int res;
   /* Set up the signal handler.  */
-  {
-    struct sigaction action;
-    memset (&action, 0, sizeof (action));
-    action.sa_handler = handler;
-    sigaction (SIGVTALRM, &action, NULL);
-  }
-
-  /* Set up a one-off timer.  A timer, rather than SIGSEGV, is used as
-     after a timer handler finishes the interrupted code can safely
-     resume.  */
-  {
-    struct itimerval itime;
-    memset (&itime, 0, sizeof (itime));
-    itime.it_value.tv_usec = 250 * 1000;
-    setitimer (ITIMER_VIRTUAL, &itime, NULL);
-  }
-
-  /* Wait.  */
-  while (!done);
+  memset (&action, 0, sizeof (action));
+  action.sa_handler = handler;
+  sigaction (SIGVTALRM, &action, NULL);
+  sigaction (SIGALRM, &action, NULL);
+
+  /* The values needed for the itimer.  This needs to be at least long
+     enough for the setitimer() call to return.  */
+  memset (&itime, 0, sizeof (itime));
+  itime.it_value.tv_usec = 250 * 1000;
+
+  /* Loop for ever, constantly taking an interrupt.  */
+  while (1)
+    {
+      /* Set up a one-off timer.  A timer, rather than SIGSEGV, is
+        used as after a timer handler finishes the interrupted code
+        can safely resume.  */
+      res = setitimer (itimer, &itime, NULL);
+      if (res == -1)
+       {
+         printf ("First call to setitimer failed, errno = %d\r\n",errno);
+         itimer = ITIMER_REAL;
+         res = setitimer (itimer, &itime, NULL);
+         if (res == -1)
+           {
+             printf ("Second call to setitimer failed, errno = %d\r\n",errno);
+             return 1;
+           }
+       }
+      /* Wait.  */
+      while (!done);
+      done = 0;
+    }
   return 0;
-} /* main */
+}