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Rewrite of the dll file search algorithm to better deal with the 

broken behavior of RtlDosSearchPath_U.
This commit is contained in:
Alexandre Julliard 2003-10-07 03:48:42 +00:00
parent 509e4d175a
commit 5d9422b09f
1 changed files with 117 additions and 45 deletions
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160
dlls/ntdll/loader.c
View File

@ -1239,6 +1239,93 @@ static NTSTATUS load_builtin_dll( LPCWSTR path, DWORD flags, WINE_MODREF** pwm )
}
/***********************************************************************
* find_dll_file
*
* Find the file (or already loaded module) for a given dll name.
*/
static NTSTATUS find_dll_file( const WCHAR *load_path, const WCHAR *libname,
WCHAR *filename, ULONG *size, WINE_MODREF **pwm, HANDLE *handle )
{
WCHAR *file_part, *ext;
ULONG len;
if (RtlDetermineDosPathNameType_U( libname ) == RELATIVE_PATH)
{
/* we need to search for it */
/* but first append .dll because RtlDosSearchPath extension handling is broken */
if (!(ext = strrchrW( libname, '.')) || strchrW( ext, '/' ) || strchrW( ext, '\\'))
{
WCHAR *dllname;
if (!(dllname = RtlAllocateHeap( GetProcessHeap(), 0,
(strlenW(libname) * sizeof(WCHAR)) + sizeof(dllW) )))
return STATUS_NO_MEMORY;
strcpyW( dllname, libname );
strcatW( dllname, dllW );
len = RtlDosSearchPath_U( load_path, dllname, NULL, *size, filename, &file_part );
RtlFreeHeap( GetProcessHeap(), 0, dllname );
}
else len = RtlDosSearchPath_U( load_path, libname, NULL, *size, filename, &file_part );
if (len)
{
if (len >= *size)
{
*size = len + sizeof(WCHAR);
return STATUS_BUFFER_TOO_SMALL;
}
if ((*pwm = find_module( filename )) != NULL) return STATUS_SUCCESS;
/* check for already loaded module in a different path */
if (!contains_path( libname ))
{
if ((*pwm = find_module( file_part )) != NULL) return STATUS_SUCCESS;
}
*handle = CreateFileW( filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0 );
return STATUS_SUCCESS;
}
/* not found */
if (!contains_path( libname ))
{
/* if libname doesn't contain a path at all, we simply return the name as is,
* to be loaded as builtin */
len = strlenW(libname) * sizeof(WCHAR);
if (len >= *size) goto overflow;
strcpyW( filename, libname );
if (!strchrW( filename, '.' ))
{
len += sizeof(dllW) - sizeof(WCHAR);
if (len >= *size) goto overflow;
strcatW( filename, dllW );
}
*pwm = find_module( filename );
return STATUS_SUCCESS;
}
}
/* absolute path name, or relative path name but not found above */
len = RtlGetFullPathName_U( libname, *size, filename, &file_part );
if (len >= *size) goto overflow;
if (file_part && !strchrW( file_part, '.' ))
{
len += sizeof(dllW) - sizeof(WCHAR);
if (len >= *size) goto overflow;
strcatW( file_part, dllW );
}
if ((*pwm = find_module( filename )) != NULL) return STATUS_SUCCESS;
*handle = CreateFileW( filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0 );
return STATUS_SUCCESS;
overflow:
*size = len + sizeof(WCHAR);
return STATUS_BUFFER_TOO_SMALL;
}
/***********************************************************************
* load_dll (internal)
*
@ -1249,47 +1336,47 @@ static NTSTATUS load_dll( LPCWSTR libname, DWORD flags, WINE_MODREF** pwm )
{
int i;
enum loadorder_type loadorder[LOADORDER_NTYPES];
WCHAR *filename, *file_part;
WCHAR buffer[32];
WCHAR *filename;
ULONG size;
const char *filetype = "";
WINE_MODREF *main_exe;
HANDLE handle = INVALID_HANDLE_VALUE;
NTSTATUS nts = STATUS_DLL_NOT_FOUND;
NTSTATUS nts;
const WCHAR *load_path;
*pwm = NULL;
filename = RtlAllocateHeap ( GetProcessHeap(), 0, MAX_PATH * sizeof(WCHAR) );
if ( !filename ) return STATUS_NO_MEMORY;
if (!(load_path = current_load_path))
load_path = NtCurrentTeb()->Peb->ProcessParameters->DllPath.Buffer;
TRACE( "looking for %s in %s\n", debugstr_w(libname), debugstr_w(load_path) );
if (RtlDosSearchPath_U( load_path, libname, dllW, MAX_PATH * sizeof(WCHAR), filename, &file_part ))
filename = buffer;
size = sizeof(buffer);
for (;;)
{
if ((*pwm = find_module( filename )) != NULL) goto found;
nts = find_dll_file( load_path, libname, filename, &size, pwm, &handle );
if (nts == STATUS_SUCCESS) break;
if (filename != buffer) RtlFreeHeap( GetProcessHeap(), 0, filename );
if (nts != STATUS_BUFFER_TOO_SMALL) return nts;
/* grow the buffer and retry */
if (!(filename = RtlAllocateHeap( GetProcessHeap(), 0, size ))) return STATUS_NO_MEMORY;
}
/* check for already loaded module in a different path */
if (!contains_path( libname ))
if (*pwm) /* found already loaded module */
{
if ((*pwm = find_module( file_part )) != NULL) goto found;
}
handle = CreateFileW( filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0 );
}
else /* we didn't find the file */
if ((*pwm)->ldr.LoadCount != -1) (*pwm)->ldr.LoadCount++;
if (((*pwm)->ldr.Flags & LDR_DONT_RESOLVE_REFS) &&
!(flags & DONT_RESOLVE_DLL_REFERENCES))
{
if (contains_path( libname ))
{
RtlGetFullPathName_U( libname, MAX_PATH * sizeof(WCHAR), filename, &file_part );
if ((*pwm = find_module( filename )) != NULL) goto found;
(*pwm)->ldr.Flags &= ~LDR_DONT_RESOLVE_REFS;
fixup_imports( *pwm );
}
else
{
if ((*pwm = find_module( libname )) != NULL) goto found;
strcpyW( filename, libname );
file_part = filename;
}
if (!strchrW( file_part, '.' )) strcatW( file_part, dllW );
TRACE("Found loaded module %s for %s at %p, count=%d\n",
debugstr_w((*pwm)->ldr.FullDllName.Buffer), debugstr_w(libname),
(*pwm)->ldr.BaseAddress, (*pwm)->ldr.LoadCount);
if (filename != buffer) RtlFreeHeap( GetProcessHeap(), 0, filename );
return STATUS_SUCCESS;
}
main_exe = get_modref( NtCurrentTeb()->Peb->ImageBaseAddress );
@ -1303,7 +1390,7 @@ static NTSTATUS load_dll( LPCWSTR libname, DWORD flags, WINE_MODREF** pwm )
{
case LOADORDER_DLL:
TRACE("Trying native dll %s\n", debugstr_w(filename));
if (handle != INVALID_HANDLE_VALUE)
if (handle == INVALID_HANDLE_VALUE) continue; /* it cannot possibly be loaded */
nts = load_native_dll(filename, handle, flags, pwm);
filetype = "native";
break;
@ -1328,7 +1415,7 @@ static NTSTATUS load_dll( LPCWSTR libname, DWORD flags, WINE_MODREF** pwm )
/* decrement the dependencies through the MODULE_FreeLibrary call. */
(*pwm)->ldr.LoadCount = 1;
if (handle != INVALID_HANDLE_VALUE) NtClose( handle );
RtlFreeHeap( GetProcessHeap(), 0, filename );
if (filename != buffer) RtlFreeHeap( GetProcessHeap(), 0, filename );
return nts;
}
if (nts != STATUS_DLL_NOT_FOUND) break;
@ -1336,23 +1423,8 @@ static NTSTATUS load_dll( LPCWSTR libname, DWORD flags, WINE_MODREF** pwm )
WARN("Failed to load module %s; status=%lx\n", debugstr_w(libname), nts);
if (handle != INVALID_HANDLE_VALUE) NtClose( handle );
RtlFreeHeap( GetProcessHeap(), 0, filename );
if (filename != buffer) RtlFreeHeap( GetProcessHeap(), 0, filename );
return nts;
found:
if ((*pwm)->ldr.LoadCount != -1) (*pwm)->ldr.LoadCount++;
if (((*pwm)->ldr.Flags & LDR_DONT_RESOLVE_REFS) &&
!(flags & DONT_RESOLVE_DLL_REFERENCES))
{
(*pwm)->ldr.Flags &= ~LDR_DONT_RESOLVE_REFS;
fixup_imports( *pwm );
}
TRACE("Found loaded module %s for %s at %p, count=%d\n",
debugstr_w((*pwm)->ldr.FullDllName.Buffer), debugstr_w(libname),
(*pwm)->ldr.BaseAddress, (*pwm)->ldr.LoadCount);
RtlFreeHeap( GetProcessHeap(), 0, filename );
return STATUS_SUCCESS;
}
/******************************************************************