WIN32 MemoryTracking: track wcsdup() _wcsdup() and _tcsdup() usage

As of 25-mar-2013 wcsdup() _wcsdup() and _tcsdup() are only used in
WIN32 specific code, so tracking of these has not been extended for
other build targets. Without this fix, memory tracking system on
WIN32 builds, when using these functions, would provide misleading
results.

In order to properly extend this support for all targets curl.h
would have to define curl_wcsdup_callback prototype and consequently
wchar_t should be visible before that in curl.h.  IOW curl_wchar_t
defined in curlbuild.h and this pulling whatever system header is
required to get wchar_t definition.

Additionally a new curl_global_init_mem() function that also receives
user defined wcsdup() callback would be required.

5 files changed, 69 insertions, 2 deletions

diff --git a/lib/curl_memory.h b/lib/curl_memory.h
index c1e92513f..4bba008c9 100644
--- a/lib/curl_memory.h
+++ b/lib/curl_memory.h
@@ -87,6 +87,9 @@ extern curl_free_callback Curl_cfree;
 extern curl_realloc_callback Curl_crealloc;
 extern curl_strdup_callback Curl_cstrdup;
 extern curl_calloc_callback Curl_ccalloc;
+#ifdef WIN32
+extern curl_wcsdup_callback Curl_cwcsdup;
+#endif
 
 #ifndef CURLDEBUG
 
@@ -110,6 +113,19 @@ extern curl_calloc_callback Curl_ccalloc;
 #undef free
 #define free(ptr) Curl_cfree(ptr)
 
+#ifdef WIN32
+#  undef wcsdup
+#  define wcsdup(ptr) Curl_cwcsdup(ptr)
+#  undef _wcsdup
+#  define _wcsdup(ptr) Curl_cwcsdup(ptr)
+#  undef _tcsdup
+#  ifdef UNICODE
+#    define _tcsdup(ptr) Curl_cwcsdup(ptr)
+#  else
+#    define _tcsdup(ptr) Curl_cstrdup(ptr)
+#  endif
+#endif
+
 #endif /* CURLDEBUG */
 
 #else /* CURLX_NO_MEMORY_CALLBACKS */
diff --git a/lib/curl_setup.h b/lib/curl_setup.h
index e4d8721a0..0508ab56c 100644
--- a/lib/curl_setup.h
+++ b/lib/curl_setup.h
@@ -270,6 +270,7 @@
 #    endif
 #  endif
 #  include <tchar.h>
+   typedef wchar_t *(*curl_wcsdup_callback)(const wchar_t *str);
 #endif
 
 /*
diff --git a/lib/easy.c b/lib/easy.c
index dc95a6d44..55144c7b9 100644
--- a/lib/easy.c
+++ b/lib/easy.c
@@ -197,6 +197,9 @@ curl_free_callback Curl_cfree = (curl_free_callback)free;
 curl_realloc_callback Curl_crealloc = (curl_realloc_callback)realloc;
 curl_strdup_callback Curl_cstrdup = (curl_strdup_callback)system_strdup;
 curl_calloc_callback Curl_ccalloc = (curl_calloc_callback)calloc;
+#ifdef WIN32
+curl_wcsdup_callback Curl_cwcsdup = (curl_wcsdup_callback)wcsdup;
+#endif
 #else
 /*
  * Symbian OS doesn't support initialization to code in writeable static data.
@@ -228,6 +231,9 @@ CURLcode curl_global_init(long flags)
   Curl_crealloc = (curl_realloc_callback)realloc;
   Curl_cstrdup = (curl_strdup_callback)system_strdup;
   Curl_ccalloc = (curl_calloc_callback)calloc;
+#ifdef WIN32
+  Curl_cwcsdup = (curl_wcsdup_callback)wcsdup;
+#endif
 
   if(flags & CURL_GLOBAL_SSL)
     if(!Curl_ssl_init()) {
diff --git a/lib/memdebug.c b/lib/memdebug.c
index 4d5f44d2f..b3ddfb430 100644
--- a/lib/memdebug.c
+++ b/lib/memdebug.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -239,6 +239,32 @@ char *curl_dostrdup(const char *str, int line, const char *source)
   return mem;
 }
 
+#ifdef WIN32
+wchar_t *curl_dowcsdup(const wchar_t *str, int line, const char *source)
+{
+  wchar_t *mem;
+  size_t wsiz, bsiz;
+
+  assert(str != NULL);
+
+  if(countcheck("wcsdup", line, source))
+    return NULL;
+
+  wsiz = wcslen(str) + 1;
+  bsiz = wsiz * sizeof(wchar_t);
+
+  mem = curl_domalloc(bsiz, 0, NULL); /* NULL prevents logging */
+  if(mem)
+    memcpy(mem, str, bsiz);
+
+  if(source)
+    curl_memlog("MEM %s:%d wcsdup(%p) (%zu) = %p\n",
+                source, line, str, bsiz, mem);
+
+  return mem;
+}
+#endif
+
 /* We provide a realloc() that accepts a NULL as pointer, which then
    performs a malloc(). In order to work with ares. */
 void *curl_dorealloc(void *ptr, size_t wantedsize,
diff --git a/lib/memdebug.h b/lib/memdebug.h
index fbeb61de5..955e8b72b 100644
--- a/lib/memdebug.h
+++ b/lib/memdebug.h
@@ -8,7 +8,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -46,6 +46,11 @@ CURL_EXTERN void *curl_dorealloc(void *ptr, size_t size, int line,
                                  const char *source);
 CURL_EXTERN void curl_dofree(void *ptr, int line, const char *source);
 CURL_EXTERN char *curl_dostrdup(const char *str, int line, const char *source);
+#ifdef WIN32
+CURL_EXTERN wchar_t *curl_dowcsdup(const wchar_t *str, int line,
+                                   const char *source);
+#endif
+
 CURL_EXTERN void curl_memdebug(const char *logname);
 CURL_EXTERN void curl_memlimit(long limit);
 CURL_EXTERN void curl_memlog(const char *format, ...);
@@ -84,6 +89,19 @@ CURL_EXTERN int curl_fclose(FILE *file, int line, const char *source);
 #define realloc(ptr,size) curl_dorealloc(ptr, size, __LINE__, __FILE__)
 #define free(ptr) curl_dofree(ptr, __LINE__, __FILE__)
 
+#ifdef WIN32
+#  undef wcsdup
+#  define wcsdup(ptr) curl_dowcsdup(ptr, __LINE__, __FILE__)
+#  undef _wcsdup
+#  define _wcsdup(ptr) curl_dowcsdup(ptr, __LINE__, __FILE__)
+#  undef _tcsdup
+#  ifdef UNICODE
+#    define _tcsdup(ptr) curl_dowcsdup(ptr, __LINE__, __FILE__)
+#  else
+#    define _tcsdup(ptr) curl_dostrdup(ptr, __LINE__, __FILE__)
+#  endif
+#endif
+
 #define socket(domain,type,protocol)\
  curl_socket(domain,type,protocol,__LINE__,__FILE__)
 #undef accept /* for those with accept as a macro */