[PATCH v2 1/2] winmm/tests: Test the mmioOpen() search path with various flags.

[Andrew Eikum]

Well, you found a new bug. Your tests crash:

    https://testbot.winehq.org/JobDetails.pl?Key=83551#k401

This is because in mmioOpenW, we allocate only the space required to
fit the input filename, but MMIO_PARSE needs room for at least 128
characters. (128 per the docs. Might as well do MAX_PATH.)

I think you need the below diff before applying your patches. It ought
to also copy the resulting filename back to the input buffer, but,
code freeze.

diff --git a/dlls/winmm/mmio.c b/dlls/winmm/mmio.c
index 48bbd3ed48d..4f13a34303c 100644
--- a/dlls/winmm/mmio.c
+++ b/dlls/winmm/mmio.c
@@ -733,10 +733,9 @@ HMMIO WINAPI mmioOpenW(LPWSTR szFileName, MMIOINFO* lpmmioinfo,
 
     if (szFileName)
     {
-        INT     len = WideCharToMultiByte( CP_ACP, 0, szFileName, -1, NULL, 0, NULL, NULL );
-        szFn = HeapAlloc( GetProcessHeap(), 0, len );
+        szFn = HeapAlloc( GetProcessHeap(), 0, MAX_PATH );
         if (!szFn) return NULL;
-        WideCharToMultiByte( CP_ACP, 0, szFileName, -1, szFn, len, NULL, NULL );
+        WideCharToMultiByte( CP_ACP, 0, szFileName, -1, szFn, MAX_PATH, NULL, NULL );
     }
 
     ret = MMIO_Open(szFn, lpmmioinfo, dwOpenFlags, TRUE);

Andrew

On Thu, Dec 17, 2020 at 02:34:26PM -0600, Zebediah Figura wrote:
> Signed-off-by: Zebediah Figura <z.figura12 at gmail.com>
> ---
> v2: don't assume cwd == executable directory
> 
>  dlls/winmm/tests/mmio.c | 60 +++++++++++++++++++++++++++++++++++------
>  1 file changed, 52 insertions(+), 8 deletions(-)
> 
> diff --git a/dlls/winmm/tests/mmio.c b/dlls/winmm/tests/mmio.c
> index e3984fbaf3a..0236855f246 100644
> --- a/dlls/winmm/tests/mmio.c
> +++ b/dlls/winmm/tests/mmio.c
> @@ -478,23 +478,34 @@ static void test_mmioOpen_create(void)
>      WCHAR cwd[MAX_PATH], temp_dir[MAX_PATH];
>      /* According to docs, filename must be no more than 128 bytes, but it will
>       * actually allow longer than that. */
> -    WCHAR filename[] = L"very_long_filename_"
> +    WCHAR long_filename[] = L"very_long_filename_"
>          L"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
>          L"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
>          L"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
> +    WCHAR buffer[MAX_PATH], expect[MAX_PATH];
> +    char exedir_filename[MAX_PATH];
> +    MMIOINFO info = {0};
> +    BOOL ret;
> +    FILE *f;
> +
> +    GetModuleFileNameA(NULL, exedir_filename, ARRAY_SIZE(exedir_filename));
> +    strcpy(strrchr(exedir_filename, '\\') + 1, "test_mmio_path");
> +    f = fopen(exedir_filename, "w");
> +    ok(!!f, "failed to create %s: %s\n", debugstr_a(exedir_filename), strerror(errno));
> +    fclose(f);
>  
>      GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd);
>      GetTempPathW(ARRAY_SIZE(temp_dir), temp_dir);
>      SetCurrentDirectoryW(temp_dir);
>  
> -    DeleteFileW(filename);
> +    DeleteFileW(long_filename);
>  
>      /* open with MMIO_DENYNONE */
> -    hmmio = mmioOpenW(filename, NULL, MMIO_CREATE | MMIO_WRITE | MMIO_DENYNONE);
> +    hmmio = mmioOpenW(long_filename, NULL, MMIO_CREATE | MMIO_WRITE | MMIO_DENYNONE);
>      ok(hmmio != NULL, "mmioOpen failed\n");
>  
>      /* MMIO_DENYNONE lets us open it here, too */
> -    handle = CreateFileW(filename, GENERIC_READ,
> +    handle = CreateFileW(long_filename, GENERIC_READ,
>              FILE_SHARE_WRITE | FILE_SHARE_READ | FILE_SHARE_DELETE, NULL,
>              OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
>      ok(handle != INVALID_HANDLE_VALUE, "Couldn't open non-exclusive file\n");
> @@ -502,14 +513,14 @@ static void test_mmioOpen_create(void)
>  
>      mmioClose(hmmio, 0);
>  
> -    DeleteFileW(filename);
> +    DeleteFileW(long_filename);
>  
>      /* open with MMIO_EXCLUSIVE */
> -    hmmio = mmioOpenW(filename, NULL, MMIO_CREATE | MMIO_WRITE | MMIO_EXCLUSIVE);
> +    hmmio = mmioOpenW(long_filename, NULL, MMIO_CREATE | MMIO_WRITE | MMIO_EXCLUSIVE);
>      ok(hmmio != NULL, "mmioOpen failed\n");
>  
>      /* should fail due to MMIO_EXCLUSIVE */
> -    handle = CreateFileW(filename, GENERIC_READ,
> +    handle = CreateFileW(long_filename, GENERIC_READ,
>              FILE_SHARE_WRITE | FILE_SHARE_READ | FILE_SHARE_DELETE, NULL,
>              OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
>      ok(handle == INVALID_HANDLE_VALUE, "Opening exclusive file should have failed\n");
> @@ -518,9 +529,42 @@ static void test_mmioOpen_create(void)
>  
>      mmioClose(hmmio, 0);
>  
> -    DeleteFileW(filename);
> +    DeleteFileW(long_filename);
> +
> +    wcscpy(buffer, L"test_mmio_path");
> +    hmmio = mmioOpenW(buffer, &info, MMIO_WRITE);
> +    todo_wine ok(!!hmmio, "failed to open file, error %#x\n", info.wErrorRet);
> +    mmioClose(hmmio, 0);
> +
> +    wcscpy(buffer, L"test_mmio_path");
> +    hmmio = mmioOpenW(buffer, &info, MMIO_PARSE);
> +    ok(hmmio == (HMMIO)TRUE, "failed to parse file name, error %#x\n", info.wErrorRet);
> +    wcscpy(expect, temp_dir);
> +    wcscat(expect, L"test_mmio_path");
> +    todo_wine ok(!wcscmp(buffer, expect), "expected %s, got %s\n", debugstr_w(expect), debugstr_w(buffer));
> +
> +    wcscpy(buffer, L"test_mmio_path");
> +    info.wErrorRet = 0xdead;
> +    hmmio = mmioOpenW(buffer, &info, MMIO_EXIST);
> +    ok(hmmio == (HMMIO)FALSE, "file should exist\n");
> +    todo_wine ok(info.wErrorRet == MMIOERR_FILENOTFOUND, "got error %#x\n", info.wErrorRet);
> +
> +    ret = DeleteFileA("test_mmio_path");
> +    ok(!ret, "expected failure\n");
> +    ok(GetLastError() == ERROR_FILE_NOT_FOUND, "got error %u\n", GetLastError());
> +
> +    wcscpy(buffer, L"test_mmio_path");
> +    hmmio = mmioOpenW(buffer, &info, MMIO_WRITE | MMIO_CREATE);
> +    ok(!!hmmio, "failed to open file, error %#x\n", info.wErrorRet);
> +    mmioClose(hmmio, 0);
> +
> +    ret = DeleteFileA("test_mmio_path");
> +    ok(ret, "got error %u\n", GetLastError());
>  
>      SetCurrentDirectoryW(cwd);
> +
> +    ret = DeleteFileA(exedir_filename);
> +    ok(ret, "got error %u\n", GetLastError());
>  }
>  
>  static void test_mmioSetBuffer(char *fname)
> -- 
> 2.29.2
> 
>