deps: sync with upstream bagder/c-ares@2bae2d5

PR-URL: https://github.com/nodejs/node/pull/5090
Reviewed-By: Saúl Ibarra Corretgé <saghul@gmail.com>

1 files changed, 21 insertions, 14 deletions

diff --git a/deps/cares/src/ares_strdup.c b/deps/cares/src/ares_strdup.c
index 18043274e9..0c3dcffc30 100644
--- a/deps/cares/src/ares_strdup.c
+++ b/deps/cares/src/ares_strdup.c
@@ -17,26 +17,33 @@
 
 #include "ares_setup.h"
 #include "ares_strdup.h"
+#include "ares.h"
+#include "ares_private.h"
 
-#ifndef HAVE_STRDUP
 char *ares_strdup(const char *s1)
 {
-  size_t sz;
-  char * s2;
+#ifdef HAVE_STRDUP
+  if (ares_malloc == malloc)
+    return strdup(s1);
+  else
+#endif
+  {
+    size_t sz;
+    char * s2;
 
-  if(s1) {
-    sz = strlen(s1);
-    if(sz < (size_t)-1) {
-      sz++;
-      if(sz < ((size_t)-1) / sizeof(char)) {
-        s2 = malloc(sz * sizeof(char));
-        if(s2) {
-          memcpy(s2, s1, sz * sizeof(char));
-          return s2;
+    if(s1) {
+      sz = strlen(s1);
+      if(sz < (size_t)-1) {
+        sz++;
+        if(sz < ((size_t)-1) / sizeof(char)) {
+          s2 = ares_malloc(sz * sizeof(char));
+          if(s2) {
+            memcpy(s2, s1, sz * sizeof(char));
+            return s2;
+          }
         }
       }
     }
+    return (char *)NULL;
   }
-  return (char *)NULL;
 }
-#endif