re PR gcov-profile/55417 (AddressSanitizer reports stack-buffer-overflow in profiling code)

	PR gcov-profile/55417
	* profile.c (compute_working_sets): Check index first
	to avoid out-of-bounds array access.

From-SVN: r193697

gcc/ChangeLog

+2012-11-21  Teresa Johnson  <tejohnson@google.com>
+
+	PR gcov-profile/55417
+	* profile.c (compute_working_sets): Check index first
+	to avoid out-of-bounds array access.
+
 2012-11-21  Matthias Klose  <doko@ubuntu.com>
 
 	* config/aarch64/t-aarch64-linux: Define MULTIARCH_DIRNAME for

gcc/profile.c

@@ -291,8 +291,8 @@ compute_working_sets (void)
 	  /* Next walk through successive working set entries and fill in
 	     the statistics for any whose size we have reached by accumulating
 	     this histogram counter.  */
-          while (tmp_cum >= working_set_cum_values[ws_ix]
-                 && ws_ix < NUM_GCOV_WORKING_SETS)
+	  while (ws_ix < NUM_GCOV_WORKING_SETS
+		 && tmp_cum >= working_set_cum_values[ws_ix])
             {
               gcov_working_sets[ws_ix].num_counters = count;
               gcov_working_sets[ws_ix].min_counter