From a28cd72ce6fa6f5619f0952a9569f046a13770d2 Mon Sep 17 00:00:00 2001
From: sin
Date: Wed, 4 Mar 2015 12:27:04 +0000
Subject: Add wcrtomb(), wcscat() and wcscpy() checks

---
 include/wchar.h | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 'include/wchar.h')

diff --git a/include/wchar.h b/include/wchar.h
index b3a1dc7..69c2188 100644
--- a/include/wchar.h
+++ b/include/wchar.h
@@ -1,6 +1,7 @@
 #ifndef FORTIFY_WCHAR_H_
 #define FORTIFY_WCHAR_H_
 
+#include_next <stdlib.h>
 #include_next <wchar.h>
 
 #if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0
@@ -51,6 +52,39 @@ __fortify_mbstowcs(wchar_t *d, const char *s, size_t n)
 	return mbstowcs(d, s, n);
 }
 
+static inline __attribute__ ((always_inline))
+size_t
+__fortify_wcrtomb(char *s, wchar_t wc, mbstate_t *st)
+{
+	size_t bos = __builtin_object_size(s, 0);
+
+	if (MB_CUR_MAX > bos)
+		__builtin_trap();
+	return wcrtomb(s, wc, st);
+}
+
+static inline __attribute__ ((always_inline))
+wchar_t *
+__fortify_wcscat(wchar_t *d, const wchar_t *s)
+{
+	size_t bos = __builtin_object_size(d, 0);
+
+	if (wcslen(s) + wcslen(d) + 1 > bos / sizeof(wchar_t))
+		__builtin_trap();
+	return wcscat(d, s);
+}
+
+static inline __attribute__ ((always_inline))
+wchar_t *
+__fortify_wcscpy(wchar_t *d, const wchar_t *s)
+{
+	size_t bos = __builtin_object_size(d, 0);
+
+	if (wcslen(s) + 1 > bos / sizeof(wchar_t))
+		__builtin_trap();
+	return wcscpy(d, s);
+}
+
 static inline __attribute__ ((always_inline))
 wchar_t *
 __fortify_wmemcpy(wchar_t *d, const wchar_t *s, size_t n)
@@ -92,6 +126,12 @@ __fortify_wmemset(wchar_t *s, wchar_t c, size_t n)
 #define mbsrtowcs(d, s, wn, st) __fortify_mbsrtowcs(d, s, wn, st)
 #undef mbstowcs
 #define mbstowcs(d, s, n) __fortify_mbstowcs(d, s, n)
+#undef wcrtomb
+#define wcrtomb(s, wc, st) __fortify_wcrtomb(s, wc, st)
+#undef wcscat
+#define wcscat(d, s) __fortify_wcscat(d, s)
+#undef wcscpy
+#define wcscpy(d, s) __fortify_wcscpy(d, s)
 #undef wmemcpy
 #define wmemcpy(d, s, n) __fortify_wmemcpy(d, s, n)
 #undef wmemmove
-- 
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