added for memory leak debugging etc

lib/memdebug.c

+#ifdef MALLOCDEBUG
+/*****************************************************************************
+ *                                  _   _ ____  _     
+ *  Project                     ___| | | |  _ \| |    
+ *                             / __| | | | |_) | |    
+ *                            | (__| |_| |  _ <| |___ 
+ *                             \___|\___/|_| \_\_____|
+ *
+ *  The contents of this file are subject to the Mozilla Public License
+ *  Version 1.0 (the "License"); you may not use this file except in
+ *  compliance with the License. You may obtain a copy of the License at
+ *  http://www.mozilla.org/MPL/
+ *
+ *  Software distributed under the License is distributed on an "AS IS"
+ *  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
+ *  License for the specific language governing rights and limitations
+ *  under the License.
+ *
+ *  The Original Code is Curl.
+ *
+ *  The Initial Developer of the Original Code is Daniel Stenberg.
+ *
+ *  Portions created by the Initial Developer are Copyright (C) 1999.
+ *  All Rights Reserved.
+ *
+ * ------------------------------------------------------------
+ * Main author:
+ * - Daniel Stenberg <daniel@haxx.se>
+ *
+ * 	http://curl.haxx.se
+ *
+ * $Source$
+ * $Revision$
+ * $Date$
+ * $Author$
+ * $State$
+ * $Locker$
+ *
+ * ------------------------------------------------------------
+ ****************************************************************************/
+
+#include "setup.h"
+
+#include <curl/curl.h>
+#include "urldata.h"
+#include <stdio.h>
+#include <string.h>
+
+/*
+ * Note that these debug functions are very simple and they are meant to
+ * remain so. For advanced analysis, record a log file and write perl scripts
+ * to analyze them!
+ *
+ * Don't use these with multithreaded test programs!
+ */
+
+FILE *logfile=stderr;
+
+/* this sets the log file name */
+void curl_memdebug(char *logname)
+{
+  logfile = fopen(logname, "w");
+}
+
+
+void *curl_domalloc(size_t size, int line, char *source)
+{
+  void *mem=(malloc)(size);
+  fprintf(logfile, "MEM %s:%d malloc(%d) = %p\n",
+          source, line, size, mem);
+  return mem;
+}
+
+char *curl_dostrdup(char *str, int line, char *source)
+{
+  char *mem=(strdup)(str);
+  size_t len=strlen(str)+1;
+  fprintf(logfile, "MEM %s:%d strdup(%p) (%d) = %p\n",
+          source, line, str, len, mem);
+  return mem;
+}
+
+void *curl_dorealloc(void *ptr, size_t size, int line, char *source)
+{
+  void *mem=(realloc)(ptr, size);
+  fprintf(logfile, "MEM %s:%d realloc(%p, %d) = %p\n",
+          source, line, ptr, size, mem);
+  return mem;
+}
+
+void curl_dofree(void *ptr, int line, char *source)
+{
+  (free)(ptr);
+  fprintf(logfile, "MEM %s:%d free(%p)\n",
+          source, line, ptr);
+}
+
+#endif /* MALLOCDEBUG */

lib/memdebug.h

+#ifdef MALLOCDEBUG
+void *curl_domalloc(size_t size, int line, char *source);
+void *curl_dorealloc(void *ptr, size_t size, int line, char *source);
+void curl_dofree(void *ptr, int line, char *source);
+char *curl_dostrdup(char *str, int line, char *source);
+void curl_memdebug(char *logname);
+
+/* Set this symbol on the command-line, recompile all lib-sources */
+#define strdup(ptr) curl_dostrdup(ptr, __LINE__, __FILE__)
+#define malloc(size) curl_domalloc(size, __LINE__, __FILE__)
+#define realloc(ptr,size) curl_dorealloc(ptr, size, __LINE__, __FILE__)
+#define free(ptr) curl_dofree(ptr, __LINE__, __FILE__)
+#endif