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msvcrt: Fix strcpy implementation so it works on overlapping buffers. 

Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Piotr Caban 2017-08-05 18:23:13 +02:00 committed by Alexandre Julliard
parent 967fb744e4
commit 395a65bdc6
11 changed files with 32 additions and 11 deletions
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2
dlls/msvcr100/msvcr100.spec
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@ -1800,7 +1800,7 @@
@ cdecl strchr(str long) MSVCRT_strchr
@ cdecl strcmp(str str) MSVCRT_strcmp
@ cdecl strcoll(str str) MSVCRT_strcoll
@ cdecl strcpy(ptr str) ntdll.strcpy
@ cdecl strcpy(ptr str) MSVCRT_strcpy
@ cdecl strcpy_s(ptr long str) MSVCRT_strcpy_s
@ cdecl strcspn(str str) ntdll.strcspn
@ cdecl strerror(long) MSVCRT_strerror

2
dlls/msvcr110/msvcr110.spec
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@ -2158,7 +2158,7 @@
@ cdecl strchr(str long) MSVCRT_strchr
@ cdecl strcmp(str str) MSVCRT_strcmp
@ cdecl strcoll(str str) MSVCRT_strcoll
@ cdecl strcpy(ptr str) ntdll.strcpy
@ cdecl strcpy(ptr str) MSVCRT_strcpy
@ cdecl strcpy_s(ptr long str) MSVCRT_strcpy_s
@ cdecl strcspn(str str) ntdll.strcspn
@ cdecl strerror(long) MSVCRT_strerror

2
dlls/msvcr120/msvcr120.spec
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@ -2368,7 +2368,7 @@
@ cdecl strchr(str long) MSVCRT_strchr
@ cdecl strcmp(str str) MSVCRT_strcmp
@ cdecl strcoll(str str) MSVCRT_strcoll
@ cdecl strcpy(ptr str) ntdll.strcpy
@ cdecl strcpy(ptr str) MSVCRT_strcpy
@ cdecl strcpy_s(ptr long str) MSVCRT_strcpy_s
@ cdecl strcspn(str str) ntdll.strcspn
@ cdecl strerror(long) MSVCRT_strerror

2
dlls/msvcr70/msvcr70.spec
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@ -813,7 +813,7 @@
@ cdecl strchr(str long) MSVCRT_strchr
@ cdecl strcmp(str str) MSVCRT_strcmp
@ cdecl strcoll(str str) MSVCRT_strcoll
@ cdecl strcpy(ptr str) ntdll.strcpy
@ cdecl strcpy(ptr str) MSVCRT_strcpy
@ cdecl strcspn(str str) ntdll.strcspn
@ cdecl strerror(long) MSVCRT_strerror
@ cdecl strftime(ptr long str ptr) MSVCRT_strftime

2
dlls/msvcr71/msvcr71.spec
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@ -809,7 +809,7 @@
@ cdecl strchr(str long) MSVCRT_strchr
@ cdecl strcmp(str str) MSVCRT_strcmp
@ cdecl strcoll(str str) MSVCRT_strcoll
@ cdecl strcpy(ptr str) ntdll.strcpy
@ cdecl strcpy(ptr str) MSVCRT_strcpy
@ cdecl strcspn(str str) ntdll.strcspn
@ cdecl strerror(long) MSVCRT_strerror
@ cdecl strftime(ptr long str ptr) MSVCRT_strftime

2
dlls/msvcr80/msvcr80.spec
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@ -1480,7 +1480,7 @@
@ cdecl strchr(str long) MSVCRT_strchr
@ cdecl strcmp(str str) MSVCRT_strcmp
@ cdecl strcoll(str str) MSVCRT_strcoll
@ cdecl strcpy(ptr str) ntdll.strcpy
@ cdecl strcpy(ptr str) MSVCRT_strcpy
@ cdecl strcpy_s(ptr long str) MSVCRT_strcpy_s
@ cdecl strcspn(str str) ntdll.strcspn
@ cdecl strerror(long) MSVCRT_strerror

2
dlls/msvcr90/msvcr90.spec
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@ -1453,7 +1453,7 @@
@ cdecl strchr(str long) MSVCRT_strchr
@ cdecl strcmp(str str) MSVCRT_strcmp
@ cdecl strcoll(str str) MSVCRT_strcoll
@ cdecl strcpy(ptr str) ntdll.strcpy
@ cdecl strcpy(ptr str) MSVCRT_strcpy
@ cdecl strcpy_s(ptr long str) MSVCRT_strcpy_s
@ cdecl strcspn(str str) ntdll.strcspn
@ cdecl strerror(long) MSVCRT_strerror

2
dlls/msvcrt/msvcrt.spec
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@ -1421,7 +1421,7 @@
@ cdecl strchr(str long) MSVCRT_strchr
@ cdecl strcmp(str str) MSVCRT_strcmp
@ cdecl strcoll(str str) MSVCRT_strcoll
@ cdecl strcpy(ptr str) ntdll.strcpy
@ cdecl strcpy(ptr str) MSVCRT_strcpy
@ cdecl strcpy_s(ptr long str) MSVCRT_strcpy_s
@ cdecl strcspn(str str) ntdll.strcspn
@ cdecl strerror(long) MSVCRT_strerror

10
dlls/msvcrt/string.c
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@ -696,6 +696,16 @@ char* __cdecl MSVCRT_strncpy(char *dst, const char *src, MSVCRT_size_t len)
return dst;
}
/*********************************************************************
* strcpy (MSVCRT.@)
*/
char* CDECL MSVCRT_strcpy(char *dst, const char *src)
{
char *ret = dst;
while ((*dst++ = *src++));
return ret;
}
/*********************************************************************
* strcpy_s (MSVCRT.@)
*/

15
dlls/msvcrt/tests/string.c
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@ -56,6 +56,7 @@ static void* (__cdecl *pmemcpy)(void *, const void *, size_t n);
static int (__cdecl *p_memcpy_s)(void *, size_t, const void *, size_t);
static int (__cdecl *p_memmove_s)(void *, size_t, const void *, size_t);
static int* (__cdecl *pmemcmp)(void *, const void *, size_t n);
static int (__cdecl *p_strcpy)(char *dst, const char *src);
static int (__cdecl *pstrcpy_s)(char *dst, size_t len, const char *src);
static int (__cdecl *pstrcat_s)(char *dst, size_t len, const char *src);
static int (__cdecl *p_mbscat_s)(unsigned char *dst, size_t size, const unsigned char *src);
@ -493,8 +494,8 @@ static void test_strdup(void)
static void test_strcpy_s(void)
{
char dest[8];
const char *small = "small";
const char *big = "atoolongstringforthislittledestination";
const char small[] = "small";
const char big[] = "atoolongstringforthislittledestination";
int ret;
if(!pstrcpy_s)
@ -543,6 +544,15 @@ static void test_strcpy_s(void)
ret = pstrcpy_s(NULL, sizeof(dest), small);
ok(ret == EINVAL, "Copying a big string a NULL dest returned %d, expected EINVAL\n", ret);
/* strcpy overlapping buffers test */
memset(dest, 'X', sizeof(dest));
memcpy(dest+1, small, sizeof(small));
p_strcpy(dest, dest+1);
ok(dest[0] == 's' && dest[1] == 'm' && dest[2] == 'a' && dest[3] == 'l' &&
dest[4] == 'l' && dest[5] == '\0' && dest[6] == '\0' && dest[7] == 'X',
"Unexpected return data from strcpy: 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n",
dest[0], dest[1], dest[2], dest[3], dest[4], dest[5], dest[6], dest[7]);
}
#define NUMELMS(array) (sizeof(array)/sizeof((array)[0]))
@ -3199,6 +3209,7 @@ START_TEST(string)
SET(pmemcmp,"memcmp");
SET(p_mbctype,"_mbctype");
SET(p__mb_cur_max,"__mb_cur_max");
SET(p_strcpy, "strcpy");
pstrcpy_s = (void *)GetProcAddress( hMsvcrt,"strcpy_s" );
pstrcat_s = (void *)GetProcAddress( hMsvcrt,"strcat_s" );
p_mbscat_s = (void*)GetProcAddress( hMsvcrt, "_mbscat_s" );

2
dlls/ucrtbase/ucrtbase.spec
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@ -2499,7 +2499,7 @@
@ cdecl strchr(str long) MSVCRT_strchr
@ cdecl strcmp(str str) MSVCRT_strcmp
@ cdecl strcoll(str str) MSVCRT_strcoll
@ cdecl strcpy(ptr str) ntdll.strcpy
@ cdecl strcpy(ptr str) MSVCRT_strcpy
@ cdecl strcpy_s(ptr long str) MSVCRT_strcpy_s
@ cdecl strcspn(str str) ntdll.strcspn
@ cdecl strerror(long) MSVCRT_strerror