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kernel32: Implement the LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE flag. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2018-03-01 17:21:32 +01:00
parent e1d8c176ef
commit e55101715c
2 changed files with 50 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
dlls/kernel32/module.c
View File

@ -58,6 +58,15 @@ static struct list dll_dir_list = LIST_INIT( dll_dir_list ); /* extra dirs from
static WCHAR *dll_directory; /* extra path for SetDllDirectoryW */
static DWORD default_search_flags; /* default flags set by SetDefaultDllDirectories */
/* to keep track of LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE file handles */
struct exclusive_datafile
{
struct list entry;
HMODULE module;
HANDLE file;
};
static struct list exclusive_datafile_list = LIST_INIT( exclusive_datafile_list );
static CRITICAL_SECTION dlldir_section;
static CRITICAL_SECTION_DEBUG critsect_debug =
{
@ -1127,11 +1136,10 @@ static BOOL load_library_as_datafile( LPCWSTR name, HMODULE *hmod, DWORD flags )
HANDLE mapping;
HMODULE module = 0;
DWORD protect = PAGE_READONLY;
DWORD sharing = FILE_SHARE_READ;
DWORD sharing = FILE_SHARE_READ | FILE_SHARE_DELETE;
*hmod = 0;
if (!(flags & LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE)) sharing |= FILE_SHARE_WRITE;
if (flags & LOAD_LIBRARY_AS_IMAGE_RESOURCE) protect |= SEC_IMAGE;
if (SearchPathW( NULL, name, dotDLL, sizeof(filenameW) / sizeof(filenameW[0]),
@ -1153,6 +1161,17 @@ static BOOL load_library_as_datafile( LPCWSTR name, HMODULE *hmod, DWORD flags )
/* make sure it's a valid PE file */
if (!RtlImageNtHeader( module )) goto failed;
*hmod = (HMODULE)((char *)module + 1); /* set bit 0 for data file module */
if (flags & LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE)
{
struct exclusive_datafile *file = HeapAlloc( GetProcessHeap(), 0, sizeof(*file) );
if (!file) goto failed;
file->module = *hmod;
file->file = hFile;
list_add_head( &exclusive_datafile_list, &file->entry );
TRACE( "delaying close %p for module %p\n", file->file, file->module );
return TRUE;
}
}
else *hmod = (HMODULE)((char *)module + 2); /* set bit 1 for image resource module */
@ -1206,12 +1225,12 @@ static HMODULE load_library( const UNICODE_STRING *libname, DWORD flags )
LdrUnlockLoaderLock( 0, magic );
goto done;
}
if (load_library_as_datafile( libname->Buffer, &hModule, flags ))
{
LdrUnlockLoaderLock( 0, magic );
goto done;
}
LdrUnlockLoaderLock( 0, magic );
/* The method in load_library_as_datafile allows searching for the
* 'native' libraries only
*/
if (load_library_as_datafile( libname->Buffer, &hModule, flags )) goto done;
flags |= DONT_RESOLVE_DLL_REFERENCES; /* Just in case */
/* Fallback to normal behaviour */
}
@ -1346,6 +1365,23 @@ BOOL WINAPI DECLSPEC_HOTPATCH FreeLibrary(HINSTANCE hLibModule)
if ((ULONG_PTR)hLibModule & 3) /* this is a datafile module */
{
if ((ULONG_PTR)hLibModule & 1)
{
struct exclusive_datafile *file;
ULONG_PTR magic;
LdrLockLoaderLock( 0, NULL, &magic );
LIST_FOR_EACH_ENTRY( file, &exclusive_datafile_list, struct exclusive_datafile, entry )
{
if (file->module != hLibModule) continue;
TRACE( "closing %p for module %p\n", file->file, file->module );
CloseHandle( file->file );
list_remove( &file->entry );
HeapFree( GetProcessHeap(), 0, file );
break;
}
LdrUnlockLoaderLock( 0, magic );
}
return UnmapViewOfFile( (void *)((ULONG_PTR)hLibModule & ~3) );
}

9
dlls/kernel32/tests/loader.c
View File

@ -877,8 +877,13 @@ static void test_Loader(void)
SetLastError(0xdeadbeef);
h = CreateFileA( dll_name, GENERIC_WRITE, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0 );
todo_wine ok( h == INVALID_HANDLE_VALUE, "open succeeded\n" );
todo_wine ok( GetLastError() == ERROR_SHARING_VIOLATION, "wrong error %u\n", GetLastError() );
ok( h == INVALID_HANDLE_VALUE, "open succeeded\n" );
ok( GetLastError() == ERROR_SHARING_VIOLATION, "wrong error %u\n", GetLastError() );
CloseHandle( h );
SetLastError(0xdeadbeef);
h = CreateFileA( dll_name, GENERIC_READ | DELETE, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0 );
ok( h != INVALID_HANDLE_VALUE, "open failed err %u\n", GetLastError() );
CloseHandle( h );
SetLastError(0xdeadbeef);