nobu	2015-07-19 09:25:45 +0900 (Sun, 19 Jul 2015)

  New Revision: 51295

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=51295

  Log:
    eval.c: check tag value
    
    * eval.c (rb_jump_tag): paranoiac check of tag value.

  Modified files:
    trunk/eval.c
    trunk/eval_error.c
Index: eval_error.c
===================================================================
--- eval_error.c	(revision 51294)
+++ eval_error.c	(revision 51295)
@@ -258,6 +258,9 @@ sysexit_status(VALUE err) https://github.com/ruby/ruby/blob/trunk/eval_error.c#L258
     return NUM2INT(st);
 }
 
+#define unknown_longjmp_status(status) \
+    rb_bug("Unknown longjmp status %d", status)
+
 static int
 error_handle(int ex)
 {
@@ -314,7 +317,7 @@ error_handle(int ex) https://github.com/ruby/ruby/blob/trunk/eval_error.c#L317
 	error_print();
 	break;
       default:
-	rb_bug("Unknown longjmp status %d", ex);
+	unknown_longjmp_status(ex);
 	break;
     }
     rb_threadptr_reset_raised(th);
Index: eval.c
===================================================================
--- eval.c	(revision 51294)
+++ eval.c	(revision 51295)
@@ -755,6 +755,9 @@ rb_raise_jump(VALUE mesg, VALUE cause) https://github.com/ruby/ruby/blob/trunk/eval.c#L755
 void
 rb_jump_tag(int tag)
 {
+    if (UNLIKELY(tag < TAG_RETURN || tag > TAG_FATAL)) {
+	unknown_longjmp_status(tag);
+    }
     JUMP_TAG(tag);
 }
 

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