1 files changed, 111 insertions, 0 deletions
diff --git a/libsigsegv/tests/sigsegv1.c b/libsigsegv/tests/sigsegv1.c
new file mode 100644
index 00000000..ce006428
--- /dev/null
+++ b/libsigsegv/tests/sigsegv1.c
@@ -0,0 +1,111 @@
+/* Test that the handler is called, with the right fault address.
+   Copyright (C) 2002-2006, 2008  Bruno Haible <bruno@clisp.org>
+
+   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, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef _MSC_VER
+# include <config.h>
+#endif
+
+#include "sigsegv.h"
+#include <stdio.h>
+
+#if HAVE_SIGSEGV_RECOVERY
+
+#include "mmaputil.h"
+#include <stdlib.h>
+
+unsigned long page;
+
+volatile int handler_called = 0;
+
+int
+handler (void *fault_address, int serious)
+{
+  handler_called++;
+  if (handler_called > 10)
+    abort ();
+  if (fault_address != (void *)(page + 0x678))
+    abort ();
+  if (mprotect ((void *) page, 0x4000, PROT_READ_WRITE) == 0)
+    return 1;
+  return 0;
+}
+
+void
+crasher (unsigned long p)
+{
+  *(volatile int *) (p + 0x678) = 42;
+}
+
+int
+main ()
+{
+  void *p;
+
+  /* Preparations.  */
+#if !HAVE_MMAP_ANON && !HAVE_MMAP_ANONYMOUS && HAVE_MMAP_DEVZERO
+  zero_fd = open ("/dev/zero", O_RDONLY, 0644);
+#endif
+
+  /* Setup some mmaped memory.  */
+  p = mmap_zeromap ((void *) 0x12340000, 0x4000);
+  if (p == (void *)(-1))
+    {
+      fprintf (stderr, "mmap_zeromap failed.\n");
+      exit (2);
+    }
+  page = (unsigned long) p;
+
+  /* Make it read-only.  */
+  if (mprotect ((void *) page, 0x4000, PROT_READ) < 0)
+    {
+      fprintf (stderr, "mprotect failed.\n");
+      exit (2);
+    }
+  /* Test whether it's possible to make it read-write after it was read-only.
+     This is not possible on Cygwin.  */
+  if (mprotect ((void *) page, 0x4000, PROT_READ_WRITE) < 0
+      || mprotect ((void *) page, 0x4000, PROT_READ) < 0)
+    {
+      fprintf (stderr, "mprotect failed.\n");
+      exit (2);
+    }
+
+  /* Install the SIGSEGV handler.  */
+  sigsegv_install_handler (&handler);
+
+  /* The first write access should invoke the handler and then complete.  */
+  crasher (page);
+  /* The second write access should not invoke the handler.  */
+  crasher (page);
+
+  /* Check that the handler was called only once.  */
+  if (handler_called != 1)
+    exit (1);
+  /* Test passed!  */
+  printf ("Test passed.\n");
+  return 0;
+}
+
+#else
+
+int
+main ()
+{
+  return 77;
+}
+
+#endif