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Re: [C PATCH] -Wsizeof-pointer-memaccess warning

On 08/16/2012 09:10 PM, Jakub Jelinek wrote:

+  switch (DECL_FUNCTION_CODE (callee))
+    {
+    case BUILT_IN_STRNCMP:
+    case BUILT_IN_STRNCASECMP:
+    case BUILT_IN_STRNCPY:
+    case BUILT_IN_STRNCAT:
+      strop = true;
+      /* FALLTHRU */
+    case BUILT_IN_MEMCPY:
+    case BUILT_IN_MEMMOVE:
+    case BUILT_IN_MEMCMP:
+      if (VEC_length (tree, params) < 3)
+	return;
+      src = VEC_index (tree, params, 1);
+      dest = VEC_index (tree, params, 0);
+      break;
+    case BUILT_IN_MEMSET:
+      if (VEC_length (tree, params) < 3)
+	return;
+      dest = VEC_index (tree, params, 0);
+      break;
+    case BUILT_IN_STRNDUP:
+      src = VEC_index (tree, params, 0);
+      strop = true;
+      break;
+    default:
+      break;
+    }

I think this would apply to memchr, snprintf, vsnprintf, stpncopy, bzero, bcopy, bcmp as well. Or are some of them already lowered at this point?

--
Florian Weimer / Red Hat Product Security Team

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