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

1 files changed, 35 insertions, 29 deletions

diff --git a/gcc/coverage.c b/gcc/coverage.c
index a558e86..e3cd9ab 100644
--- a/gcc/coverage.c
+++ b/gcc/coverage.c
@@ -445,36 +445,42 @@ 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++)
-	  if (string[i]=='_')
-	    {
-	      int y;
-	      unsigned seed;
-	      int scan;
-
-	      for (y = 1; y < 9; y++)
-		if (!(string[i + y] >= '0' && string[i + y] <= '9')
-		    && !(string[i + y] >= 'A' && string[i + y] <= 'F'))
-		  break;
-	      if (y != 9 || string[i + 9] != '_')
-		continue;
-	      for (y = 10; y < 18; y++)
-		if (!(string[i + y] >= '0' && string[i + y] <= '9')
-		    && !(string[i + y] >= 'A' && string[i + y] <= 'F'))
-		  break;
-	      if (y != 18)
-		continue;
-	      scan = sscanf (string + i + 10, "%X", &seed);
-	      gcc_assert (scan);
-	      if (seed != crc32_string (0, flag_random_seed))
-		continue;
-	      string = dup = xstrdup (string);
-	      for (y = 10; y < 18; y++)
-		dup[i + y] = '0';
-	      break;
-	    }
-      break;
+      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;
+
+              for (y = 1; y < 9; y++)
+                if (!(string[i + y] >= '0' && string[i + y] <= '9')
+                    && !(string[i + y] >= 'A' && string[i + y] <= 'F'))
+                  break;
+              if (y != 9 || string[i + 9] != '_')
+                continue;
+              for (y = 10; y < 18; y++)
+                if (!(string[i + y] >= '0' && string[i + y] <= '9')
+                    && !(string[i + y] >= 'A' && string[i + y] <= 'F'))
+                  break;
+              if (y != 18)
+                continue;
+              if (!dup)
+                string = dup = xstrdup (string);
+              for (y = 10; y < 18; y++)
+                dup[i + y] = '0';
+            }
+        break;
     }
 
   chksum = crc32_string (chksum, string);