[patch] Avoid sweep string variable ICE; issue a warning when it occurs

gcc-3.4.4-sweepregwarn.patch (text/plain), 1.19 KB, created by Kevin F. Quinn (RETIRED) on 2006-01-08 06:59:28 UTC

	This is a quick hack to avoid the ICEs reported for many
	C++ applications.  It trivially avoids the ICE by skipping
	the sweep of string variables that sweep_string_variable
	doesn't understand.  If those variables _should_ have been
	swept, then overflows on these variables may corrupt other
	scalar data; however if this works it's better than switching
	off SSP completely.
	Kevin F. Quinn <[e-mail]> 21 Dec 2005

--- gcc/protector.c.orig	2005-12-21 07:52:40.000000000 +0100
+++ gcc/protector.c	2005-12-21 07:55:36.000000000 +0100
@@ -1145,6 +1145,13 @@
 
   switch (GET_CODE (sweep_var))
     {
+    case REG:
+      warning ("sweep string type RET (%d) ignored - rtl:\n",
+	       GET_CODE(sweep_var));
+      print_rtl(stderr, sweep_var);
+      fputs("\n",stderr);
+      return;
+      break;
     case MEM:
       if (GET_CODE (XEXP (sweep_var, 0)) == ADDRESSOF
 	  && GET_CODE (XEXP (XEXP (sweep_var, 0), 0)) == REG)
@@ -1155,6 +1162,10 @@
       sweep_offset = INTVAL (sweep_var);
       break;
     default:
+      warning ("sweep string type %d unexpected - rtl:\n",
+	       GET_CODE(sweep_var));
+      print_rtl(stderr, sweep_var);
+      fputs("\n",stderr);
       abort ();
     }