re PR gcov-profile/20815 (-fprofile-use barfs with "coverage mismatch for…

re PR gcov-profile/20815 (-fprofile-use barfs with "coverage mismatch for function '...' while reading counter 'arcs'.")


	PR profile/20815
	* coverage.c (coverage_checksum_string): Fix code to stip random seeds
	from symbol names while computing checkup.

From-SVN: r106283

gcc/ChangeLog

 2005-10-31  Jan Hubicka  <jh@suse.cz>
 
+	PR profile/20815
+	* coverage.c (coverage_checksum_string): Fix code to stip random seeds
+	from symbol names while computing checkup.
+
 	PR profile/24487
 	* predict.c (predict_loops): Do not estimate more than
 	MAX_PRED_LOOP_ITERATIONS in PRED_LOOP_ITERATIONS heuristic.

gcc/coverage.c

@@ -445,13 +445,23 @@ coverage_checksum_string (unsigned chksum, const char *string)
      as the checksums are used only for sanity checking.  */
   for (i = 0; string[i]; i++)
     {
+      int offset = 0;
+      if (!strncmp (string + i, "_GLOBAL__N_", 11))
+      offset = 11;
       if (!strncmp (string + i, "_GLOBAL__", 9))
-	for (i = i + 9; string[i]; i++)
+      offset = 9;
+
+      /* C++ namespaces do have scheme:
+         _GLOBAL__N_<filename>_<wrongmagicnumber>_<magicnumber>functionname
+       since filename might contain extra underscores there seems
+       to be no better chance then walk all possible offsets looking
+       for magicnuber.  */
+      if (offset)
+        for (;string[offset]; offset++)
+        for (i = i + offset; string[i]; i++)
           if (string[i]=='_')
             {
               int y;
-	      unsigned seed;
-	      int scan;
 
               for (y = 1; y < 9; y++)
                 if (!(string[i + y] >= '0' && string[i + y] <= '9')
@@ -465,14 +475,10 @@ coverage_checksum_string (unsigned chksum, const char *string)
                   break;
               if (y != 18)
                 continue;
-	      scan = sscanf (string + i + 10, "%X", &seed);
-	      gcc_assert (scan);
-	      if (seed != crc32_string (0, flag_random_seed))
-		continue;
+              if (!dup)
                 string = dup = xstrdup (string);
               for (y = 10; y < 18; y++)
                 dup[i + y] = '0';
-	      break;
             }
         break;
     }