[PATCH v33 0/1] MR5752: msvcrt: [PR53960] Fix ucrt has different struct layout than msvcrt
UCRT's FILE struct and fd struct have different layouts, and their locks are different. Implementation in Wine does not match UCRT in Windows, causing ABI issues. see: https://bugs.winehq.org/show_bug.cgi?id=53960 -- v33: [PATCH] msvcrt: Fix incorrect layout of FILE in ucrt https://gitlab.winehq.org/wine/wine/-/merge_requests/5752
From: Shengdun Wang <uwgghhbcad(a)gmail.com> UCRT's FILE struct and fd struct have different layouts and their locks are different. Implementation in Wine does not match UCRT in windows, causing ABI issues. Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=53960 --- dlls/msvcrt/file.c | 30 +++++++++++++++++------ dlls/msvcrt/msvcrt.h | 10 ++++++-- dlls/ucrtbase/tests/file.c | 43 +++++++++++++++++++++++++++++++++ include/msvcrt/corecrt_wstdio.h | 5 ++++ include/msvcrt/stdio.h | 21 ++++++++++++++++ 5 files changed, 100 insertions(+), 9 deletions(-) diff --git a/dlls/msvcrt/file.c b/dlls/msvcrt/file.c index 24cca6fb63e..bbd395c725c 100644 --- a/dlls/msvcrt/file.c +++ b/dlls/msvcrt/file.c @@ -246,7 +246,11 @@ typedef struct { CRITICAL_SECTION crit; } file_crit; +#ifdef _UCRT +static file_crit MSVCRT__iob[_IOB_ENTRIES] = { { { 0 } } }; +#else FILE MSVCRT__iob[_IOB_ENTRIES] = { { 0 } }; +#endif static file_crit* MSVCRT_fstream[MSVCRT_MAX_FILES/MSVCRT_FD_BLOCK_SIZE]; static int MSVCRT_max_streams = 512, MSVCRT_stream_idx; @@ -502,7 +506,7 @@ static inline FILE* msvcrt_get_file(int i) return NULL; if(i < _IOB_ENTRIES) - return &MSVCRT__iob[i]; + return (FILE*)&MSVCRT__iob[i]; ret = MSVCRT_fstream[i/MSVCRT_FD_BLOCK_SIZE]; if(!ret) { @@ -604,7 +608,9 @@ static FILE* msvcrt_alloc_fp(void) { if (i == MSVCRT_stream_idx) { +#ifndef _UCRT if (file<MSVCRT__iob || file>=MSVCRT__iob+_IOB_ENTRIES) +#endif { InitializeCriticalSectionEx(&((file_crit*)file)->crit, 0, RTL_CRITICAL_SECTION_FLAG_FORCE_DEBUG_INFO); ((file_crit*)file)->crit.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": file_crit.crit"); @@ -784,14 +790,18 @@ void msvcrt_init_io(void) get_ioinfo_nolock(STDOUT_FILENO)->handle, get_ioinfo_nolock(STDERR_FILENO)->handle); - memset(MSVCRT__iob,0,3*sizeof(FILE)); + memset(MSVCRT__iob,0,3*sizeof(*MSVCRT__iob)); for (i = 0; i < 3; i++) { /* FILE structs for stdin/out/err are static and never deleted */ - MSVCRT__iob[i]._file = get_ioinfo_nolock(i)->handle == MSVCRT_NO_CONSOLE ? + ((FILE*)(MSVCRT__iob+i))->_file = get_ioinfo_nolock(i)->handle == MSVCRT_NO_CONSOLE ? MSVCRT_NO_CONSOLE_FD : i; - MSVCRT__iob[i]._tmpfname = NULL; - MSVCRT__iob[i]._flag = (i == 0) ? _IOREAD : _IOWRT; + ((FILE*)(MSVCRT__iob+i))->_tmpfname = NULL; + ((FILE*)(MSVCRT__iob+i))->_flag = (i == 0) ? _IOREAD : _IOWRT; +#ifdef _UCRT + InitializeCriticalSectionEx(&MSVCRT__iob[i].crit, 0, RTL_CRITICAL_SECTION_FLAG_FORCE_DEBUG_INFO); + MSVCRT__iob[i].crit.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": file_crit.crit"); +#endif } MSVCRT_stream_idx = 3; } @@ -936,7 +946,7 @@ static int msvcrt_int_to_base32_w(int num, wchar_t *str) #undef __iob_func FILE * CDECL __iob_func(void) { - return &MSVCRT__iob[0]; + return (FILE*)(&MSVCRT__iob[0]); } #if _MSVCR_VER >= 140 @@ -945,7 +955,7 @@ FILE * CDECL __iob_func(void) */ FILE * CDECL __acrt_iob_func(unsigned idx) { - return &MSVCRT__iob[idx]; + return (FILE*)(&MSVCRT__iob[idx]); } #endif @@ -1390,7 +1400,9 @@ void msvcrt_free_io(void) for(j=0; j<MSVCRT_stream_idx; j++) { FILE *file = msvcrt_get_file(j); +#ifndef _UCRT if(file<MSVCRT__iob || file>=MSVCRT__iob+_IOB_ENTRIES) +#endif { ((file_crit*)file)->crit.DebugInfo->Spare[0] = 0; DeleteCriticalSection(&((file_crit*)file)->crit); @@ -1461,9 +1473,11 @@ __msvcrt_long CDECL _lseek(int fd, __msvcrt_long offset, int whence) */ void CDECL _lock_file(FILE *file) { +#ifndef _UCRT if(file>=MSVCRT__iob && file<MSVCRT__iob+_IOB_ENTRIES) _lock(_STREAM_LOCKS+(file-MSVCRT__iob)); else +#endif EnterCriticalSection(&((file_crit*)file)->crit); } @@ -1472,9 +1486,11 @@ void CDECL _lock_file(FILE *file) */ void CDECL _unlock_file(FILE *file) { +#ifndef _UCRT if(file>=MSVCRT__iob && file<MSVCRT__iob+_IOB_ENTRIES) _unlock(_STREAM_LOCKS+(file-MSVCRT__iob)); else +#endif LeaveCriticalSection(&((file_crit*)file)->crit); } diff --git a/dlls/msvcrt/msvcrt.h b/dlls/msvcrt/msvcrt.h index dd7fb5895a0..9014c7d3ff9 100644 --- a/dlls/msvcrt/msvcrt.h +++ b/dlls/msvcrt/msvcrt.h @@ -284,14 +284,20 @@ extern BOOL msvcrt_create_io_inherit_block(WORD*, BYTE**); #define _RT_CRNL 252 #define _RT_BANNER 255 -extern FILE MSVCRT__iob[]; - #define MSVCRT_NO_CONSOLE_FD (-2) #define MSVCRT_NO_CONSOLE ((HANDLE)MSVCRT_NO_CONSOLE_FD) +#ifdef _UCRT +#define MSVCRT_stdin stdin +#define MSVCRT_stdout stdout +#define MSVCRT_stderr stderr +#else +extern FILE MSVCRT__iob[]; + #define MSVCRT_stdin (MSVCRT__iob+STDIN_FILENO) #define MSVCRT_stdout (MSVCRT__iob+STDOUT_FILENO) #define MSVCRT_stderr (MSVCRT__iob+STDERR_FILENO) +#endif /* internal file._flag flags */ #define MSVCRT__USERBUF 0x0100 diff --git a/dlls/ucrtbase/tests/file.c b/dlls/ucrtbase/tests/file.c index 76233be3fa7..2ee29516e00 100644 --- a/dlls/ucrtbase/tests/file.c +++ b/dlls/ucrtbase/tests/file.c @@ -81,7 +81,50 @@ static void test_std_stream_buffering(void) ok(DeleteFileA("std_stream_test.tmp"), "DeleteFile failed\n"); } +typedef struct +#ifdef __has_attribute +#if __has_attribute(__may_alias__) +__attribute((__may_alias__)) +#endif +#endif +{ + char* _ptr; + char* _base; + int _cnt; + int _flag; + int _file; + int _charbuf; + int _bufsiz; + char* _tmpfname; + CRITICAL_SECTION _crit; +}test_iobuf; + +#define TEST_IOMYBUF 0x0040 + +static void test_iobuf_layout(void) +{ + char *tempf; + FILE *fp; + test_iobuf *file; + char *ptrold; + int cntold; + tempf = _tempnam(".","wne"); + fp = fopen(tempf, "wb"); + file = (test_iobuf*)fp; + fprintf(fp, "%s", "Hello World\n"); + ptrold = file->_ptr; + cntold = file->_cnt; + fprintf(fp, "%s", "Hello"); + ok(ptrold + 5 == file->_ptr, "FILE _ptr incorrect"); + ok(cntold - 5 == file->_cnt, "FILE _cnt incorrect"); + ok(file->_ptr + file->_cnt == file->_base + file->_bufsiz, "FILE struct incorrect"); + ok(((file->_flag&TEST_IOMYBUF) == TEST_IOMYBUF), "file->_flag's _IOBUFFER_CRT incorrect"); + fclose(fp); + unlink(tempf); +} + START_TEST(file) { test_std_stream_buffering(); + test_iobuf_layout(); } diff --git a/include/msvcrt/corecrt_wstdio.h b/include/msvcrt/corecrt_wstdio.h index 404f7345c8e..30caf56e6ef 100644 --- a/include/msvcrt/corecrt_wstdio.h +++ b/include/msvcrt/corecrt_wstdio.h @@ -26,8 +26,13 @@ extern "C" { typedef struct _iobuf { char* _ptr; +#ifdef _UCRT + char* _base; + int _cnt; +#else int _cnt; char* _base; +#endif int _flag; int _file; int _charbuf; diff --git a/include/msvcrt/stdio.h b/include/msvcrt/stdio.h index 745257ea5cc..9c82a3b6a5a 100644 --- a/include/msvcrt/stdio.h +++ b/include/msvcrt/stdio.h @@ -11,6 +11,26 @@ #include <corecrt_wstdio.h> /* file._flag flags */ +#if defined(_UCRT) +#define _IOREAD 0x0001 +#define _IOWRITE 0x0002 +#define _IOWRT _IOWRITE +#define _IOUPDATE 0x0004 +#define _IORW _IOUPDATE +#define _IOEOF 0x0008 +#define _IOERR 0x0010 +#define _IOCTRLZ 0x0020 +#define _IOBUFFER_CRT 0x0040 +#define _IOMYBUF _IOBUFFER_CRT +#define _IOBUFFER_USER 0x0080 +#define _IOBUFFER_SETVBUF 0x0100 +#define _IOBUFFER_STBUF 0x0200 +#define _IOBUFFER_NONE 0x0400 +#define _IOCOMMIT 0x0800 +#define _IOSTRING 0x1000 +#define _IOSTRG _IOSTRING +#define _IOALLOCATED 0x2000 +#else #define _IOREAD 0x0001 #define _IOWRT 0x0002 #define _IOMYBUF 0x0008 @@ -18,6 +38,7 @@ #define _IOERR 0x0020 #define _IOSTRG 0x0040 #define _IORW 0x0080 +#endif #define STDIN_FILENO 0 #define STDOUT_FILENO 1 -- GitLab https://gitlab.winehq.org/wine/wine/-/merge_requests/5752
I've requested access to your repository so I can update code in this MR. Could you please approve the request? It will speed things up. -- https://gitlab.winehq.org/wine/wine/-/merge_requests/5752#note_72512
participants (3)
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cqwrteur (＠trcrsired) -
Piotr Caban (＠piotr)
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Shengdun Wang