Use emalloc and friends in curl

This avoids memory leaks when bailing in unexpected places (e.g. due to memory
limits).

Author: iluuu1994

ext/curl/interface.c

@@ -378,6 +378,34 @@ PHP_MINFO_FUNCTION(curl)
 }
 /* }}} */
 
+#if ZEND_DEBUG
+static void *zend_curl_malloc(size_t size) {
+	return emalloc(size);
+}
+
+static void zend_curl_free(void *ptr) {
+	efree(ptr);
+}
+
+static void *zend_curl_realloc(void *ptr, size_t size) {
+	return erealloc(ptr, size);
+}
+
+static char *zend_curl_strdup(const char *s) {
+	return estrdup(s);
+}
+
+static void *zend_curl_calloc(size_t nmemb, size_t size) {
+	return ecalloc(nmemb, size);
+}
+#else
+# define zend_curl_malloc _emalloc
+# define zend_curl_free _efree
+# define zend_curl_realloc _erealloc
+# define zend_curl_strdup _estrdup
+# define zend_curl_calloc _ecalloc
+#endif
+
 /* {{{ PHP_MINIT_FUNCTION */
 PHP_MINIT_FUNCTION(curl)
 {
@@ -403,7 +431,7 @@ PHP_MINIT_FUNCTION(curl)
 	}
 #endif
 
-	if (curl_global_init(CURL_GLOBAL_DEFAULT) != CURLE_OK) {
+	if (curl_global_init_mem(CURL_GLOBAL_DEFAULT, zend_curl_malloc, zend_curl_free, zend_curl_realloc, zend_curl_strdup, zend_curl_calloc) != CURLE_OK) {
 		return FAILURE;
 	}
 

ext/curl/tests/bug45161.phpt

@@ -25,11 +25,14 @@ for ($i = 0; $i < 100; $i++) {
 */
 
 // Start actual test
-$start = memory_get_usage() + 1024;
 for($i = 0; $i < 1024; $i++) {
     curl_setopt($ch, CURLOPT_URL, "{$host}/get.inc");
     curl_setopt($ch, CURLOPT_FILE, $fp);
     curl_exec($ch);
+
+    if ($i === 0) {
+        $start = memory_get_usage();
+    }
 }
 if ($start < memory_get_usage()) {
     echo 'FAIL';