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ntdll: Unwind the stack before calling exit/abort_thread. 

This prevents pthread_exit() from trying to do it and failing.
This commit is contained in:
Alexandre Julliard 2009-08-28 12:13:21 +02:00
parent 8101a2fa1e
commit ecdcf060a5
1 changed files with 92 additions and 11 deletions
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103
dlls/ntdll/signal_x86_64.c
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@ -2552,29 +2552,100 @@ void WINAPI __regs_RtlRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context )
DEFINE_REGS_ENTRYPOINT( RtlRaiseException, 1 ) DEFINE_REGS_ENTRYPOINT( RtlRaiseException, 1 )
struct topmost_frame
{
EXCEPTION_REGISTRATION_RECORD frame;
sigjmp_buf jmp;
int exit_code;
};
static void DECLSPEC_NORETURN topmost_exit_unwind_target(void)
{
struct topmost_frame *topmost_frame = (struct topmost_frame *)__wine_get_frame();
__wine_pop_frame( &topmost_frame->frame );
siglongjmp( topmost_frame->jmp, 1 );
}
static void DECLSPEC_NORETURN topmost_abort_unwind_target(void)
{
struct topmost_frame *topmost_frame = (struct topmost_frame *)__wine_get_frame();
__wine_pop_frame( &topmost_frame->frame );
siglongjmp( topmost_frame->jmp, 2 );
}
static DWORD topmost_handler( EXCEPTION_RECORD *record,
EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context,
EXCEPTION_REGISTRATION_RECORD **pdispatcher )
{
struct topmost_frame *topmost_frame = (struct topmost_frame *)frame;
EXCEPTION_POINTERS ptrs;
if (record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND | EH_NESTED_CALL))
return ExceptionContinueSearch;
ptrs.ExceptionRecord = record;
ptrs.ContextRecord = context;
switch (unhandled_exception_filter( &ptrs ))
{
case EXCEPTION_CONTINUE_SEARCH:
return ExceptionContinueSearch;
case EXCEPTION_CONTINUE_EXECUTION:
return ExceptionContinueExecution;
case EXCEPTION_EXECUTE_HANDLER:
break;
}
/* send the exit code to the server */
/* we can't simply call NtTerminateThread since it's a WINAPI function */
/* and libgcc unwinding doesn't handle those correctly */
SERVER_START_REQ( terminate_thread )
{
req->handle = wine_server_obj_handle( GetCurrentThread() );
req->exit_code = record->ExceptionCode;
wine_server_call( req );
}
SERVER_END_REQ;
topmost_frame->exit_code = record->ExceptionCode;
for (;;) RtlUnwind( frame, topmost_abort_unwind_target, record, 0 );
}
/*********************************************************************** /***********************************************************************
* call_thread_entry_point * call_thread_entry_point
*/ */
void call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void *arg ) void call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void *arg )
{ {
__TRY struct topmost_frame frame;
{
exit_thread( entry( arg ));
}
__EXCEPT(unhandled_exception_filter)
{
NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
}
__ENDTRY
abort(); /* should not be reached */
}
frame.frame.Handler = topmost_handler;
switch (sigsetjmp( frame.jmp, 0 ))
{
case 0:
__wine_push_frame( &frame.frame );
frame.exit_code = entry( arg );
__wine_pop_frame( &frame.frame );
/* fall through */
case 1:
exit_thread( frame.exit_code );
default:
terminate_thread( frame.exit_code );
}
}
/*********************************************************************** /***********************************************************************
* RtlExitUserThread (NTDLL.@) * RtlExitUserThread (NTDLL.@)
*/ */
void WINAPI RtlExitUserThread( ULONG status ) void WINAPI RtlExitUserThread( ULONG status )
{ {
EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
/* hack: find the top TEB frame and use it as unwind target */
if (teb_frame != (EXCEPTION_REGISTRATION_RECORD *)~0UL)
{
while (teb_frame->Prev != (EXCEPTION_REGISTRATION_RECORD *)~0UL) teb_frame = teb_frame->Prev;
TRACE( "unwinding to frame %p for thread exit\n", teb_frame );
((struct topmost_frame *)teb_frame)->exit_code = status;
RtlUnwind( teb_frame, topmost_exit_unwind_target, NULL, 0 );
}
exit_thread( status ); exit_thread( status );
} }
@ -2583,6 +2654,16 @@ void WINAPI RtlExitUserThread( ULONG status )
*/ */
void abort_thread( int status ) void abort_thread( int status )
{ {
EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
/* hack: find the top TEB frame and use it as unwind target */
if (teb_frame != (EXCEPTION_REGISTRATION_RECORD *)~0UL)
{
while (teb_frame->Prev != (EXCEPTION_REGISTRATION_RECORD *)~0UL) teb_frame = teb_frame->Prev;
TRACE( "unwinding to frame %p for thread exit\n", teb_frame );
((struct topmost_frame *)teb_frame)->exit_code = status;
RtlUnwind( teb_frame, topmost_abort_unwind_target, NULL, 0 );
}
terminate_thread( status ); terminate_thread( status );
} }