exercise the signal related jump code

test/setjmp/sigjmpbug.c

@@ -0,0 +1,50 @@
+/* sigsetjmp vs alloca test case.  Exercised bug on sparc.  */
+
+#include <stdio.h>
+#include <setjmp.h>
+#include <alloca.h>
+
+int ret;
+int verbose;
+
+static void
+sub5 (jmp_buf buf)
+{
+  siglongjmp (buf, 1);
+}
+
+static void
+test (int x)
+{
+  sigjmp_buf buf;
+  char *foo;
+  int arr[100];
+
+  ++ret;
+
+  arr[77] = x;
+  if (sigsetjmp (buf, 1))
+    {
+      --ret;
+      if (verbose)
+        printf ("made it ok; %d\n", arr[77]);
+      return;
+    }
+
+  foo = (char *) alloca (128);
+  sub5 (buf);
+}
+
+int
+main (int argc, char *argv[])
+{
+  int i;
+
+  verbose = (argc != 1);
+  ret = 0;
+
+  for (i = 123; i < 345; ++i)
+    test (i);
+
+  return ret;
+}