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ntdll: Use select request instead of get_suspend_context to transfer context back to client. 

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2020-04-15 14:55:22 +02:00 committed by Alexandre Julliard
parent 5e7ccd182e
commit 96cc6950f0
4 changed files with 32 additions and 15 deletions
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15
dlls/ntdll/exception.c
View File

@ -112,25 +112,10 @@ static ULONG remove_vectored_handler( struct list *handler_list, VECTORED_HANDLE
void wait_suspend( CONTEXT *context )
{
int saved_errno = errno;
context_t server_context;
DWORD flags = context->ContextFlags;
/* wait with 0 timeout, will only return once the thread is no longer suspended */
server_select( NULL, 0, SELECT_INTERRUPTIBLE, 0, context, NULL );
/* retrieve the new context */
SERVER_START_REQ( get_suspend_context )
{
wine_server_set_reply( req, &server_context, sizeof(server_context) );
wine_server_call( req );
if (wine_server_reply_size( reply ))
{
context_from_server( context, &server_context );
context->ContextFlags |= flags; /* unchanged registers are still available */
}
}
SERVER_END_REQ;
errno = saved_errno;
}

7
dlls/ntdll/server.c
View File

@ -639,9 +639,16 @@ unsigned int server_select( const select_op_t *select_op, data_size_t size, UINT
wine_server_add_data( req, &server_context, sizeof(server_context) );
suspend_context = FALSE; /* server owns the context now */
}
if (context) wine_server_set_reply( req, &server_context, sizeof(server_context) );
ret = server_call_unlocked( req );
apc_handle = reply->apc_handle;
call = reply->call;
if (wine_server_reply_size( reply ))
{
DWORD context_flags = context->ContextFlags; /* unchanged registers are still available */
context_from_server( context, &server_context );
context->ContextFlags |= context_flags;
}
}
SERVER_END_REQ;

24
server/thread.c
View File

@ -780,6 +780,19 @@ static int send_thread_wakeup( struct thread *thread, client_ptr_t cookie, int s
struct wake_up_reply reply;
int ret;
/* check if we're waking current suspend wait */
if (thread->suspend_context && thread->suspend_cookie == cookie
&& signaled != STATUS_KERNEL_APC && signaled != STATUS_USER_APC)
{
if (!thread->suspend_context->flags)
{
if (current->context == current->suspend_context) thread->context = NULL;
free( thread->suspend_context );
thread->suspend_context = NULL;
}
else signaled = STATUS_KERNEL_APC; /* signal a fake APC so that client calls select to get a new context */
}
memset( &reply, 0, sizeof(reply) );
reply.cookie = cookie;
reply.signaled = signaled;
@ -1557,6 +1570,7 @@ DECL_HANDLER(select)
memcpy( current->suspend_context, context, sizeof(*context) );
current->suspend_context->flags = 0; /* to keep track of what is modified */
current->context = current->suspend_context;
current->suspend_cookie = req->cookie;
}
if (!req->cookie)
@ -1627,6 +1641,16 @@ DECL_HANDLER(select)
}
release_object( apc );
}
else if(get_error() != STATUS_PENDING && get_reply_max_size() == sizeof(context_t)
&& current->suspend_context && current->suspend_cookie == req->cookie)
{
if (current->suspend_context->flags)
set_reply_data_ptr( current->suspend_context, sizeof(context_t) );
else
free( current->suspend_context );
if (current->context == current->suspend_context) current->context = NULL;
current->suspend_context = NULL;
}
}
/* queue an APC for a thread or process */

1
server/thread.h
View File

@ -77,6 +77,7 @@ struct thread
int unix_tid; /* Unix tid of client */
context_t *context; /* current context if in an exception handler */
context_t *suspend_context; /* current context if suspended */
client_ptr_t suspend_cookie;/* wait cookie of suspending select */
client_ptr_t teb; /* TEB address (in client address space) */
client_ptr_t entry_point; /* entry point (in client address space) */
affinity_t affinity; /* affinity mask */