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Converted the debug event queue to a standard list.

This commit is contained in:
Alexandre Julliard 2005-02-26 17:45:29 +00:00
parent f94121ed22
commit efdb4960a2
1 changed files with 34 additions and 48 deletions
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82
server/debugger.c
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@ -42,8 +42,7 @@ enum debug_event_state { EVENT_QUEUED, EVENT_SENT, EVENT_CONTINUED };
struct debug_event
{
struct object obj; /* object header */
struct debug_event *next; /* event queue */
struct debug_event *prev;
struct list entry; /* entry in event queue */
struct thread *sender; /* thread which sent this event */
struct thread *debugger; /* debugger thread receiving the event */
enum debug_event_state state; /* event state */
@ -56,8 +55,7 @@ struct debug_event
struct debug_ctx
{
struct object obj; /* object header */
struct debug_event *event_head; /* head of pending events queue */
struct debug_event *event_tail; /* tail of pending events queue */
struct list event_queue; /* pending events queue */
int kill_on_exit;/* kill debuggees on debugger exit ? */
};
@ -220,11 +218,7 @@ static const fill_event_func fill_debug_event[NB_DEBUG_EVENTS] =
/* unlink the first event from the queue */
static void unlink_event( struct debug_ctx *debug_ctx, struct debug_event *event )
{
if (event->prev) event->prev->next = event->next;
else debug_ctx->event_head = event->next;
if (event->next) event->next->prev = event->prev;
else debug_ctx->event_tail = event->prev;
event->next = event->prev = NULL;
list_remove( &event->entry );
if (event->sender->debug_event == event) event->sender->debug_event = NULL;
release_object( event );
}
@ -236,11 +230,7 @@ static void link_event( struct debug_event *event )
assert( debug_ctx );
grab_object( event );
event->next = NULL;
event->prev = debug_ctx->event_tail;
debug_ctx->event_tail = event;
if (event->prev) event->prev->next = event;
else debug_ctx->event_head = event;
list_add_tail( &debug_ctx->event_queue, &event->entry );
if (!event->sender->debug_event) wake_up( &debug_ctx->obj, 0 );
}
@ -248,13 +238,14 @@ static void link_event( struct debug_event *event )
static struct debug_event *find_event_to_send( struct debug_ctx *debug_ctx )
{
struct debug_event *event;
for (event = debug_ctx->event_head; event; event = event->next)
LIST_FOR_EACH_ENTRY( event, &debug_ctx->event_queue, struct debug_event, entry )
{
if (event->state == EVENT_SENT) continue; /* already sent */
if (event->sender->debug_event) continue; /* thread busy with another one */
break;
return event;
}
return event;
return NULL;
}
static void debug_event_dump( struct object *obj, int verbose )
@ -277,10 +268,6 @@ static void debug_event_destroy( struct object *obj )
struct debug_event *event = (struct debug_event *)obj;
assert( obj->ops == &debug_event_ops );
/* cannot still be in the queue */
assert( !event->next );
assert( !event->prev );
/* If the event has been sent already, the handles are now under the */
/* responsibility of the debugger process, so we don't touch them */
if (event->state == EVENT_QUEUED)
@ -313,7 +300,7 @@ static void debug_ctx_dump( struct object *obj, int verbose )
struct debug_ctx *debug_ctx = (struct debug_ctx *)obj;
assert( obj->ops == &debug_ctx_ops );
fprintf( stderr, "Debug context head=%p tail=%p\n",
debug_ctx->event_head, debug_ctx->event_tail );
debug_ctx->event_queue.next, debug_ctx->event_queue.prev );
}
static int debug_ctx_signaled( struct object *obj, struct thread *thread )
@ -325,40 +312,41 @@ static int debug_ctx_signaled( struct object *obj, struct thread *thread )
static void debug_ctx_destroy( struct object *obj )
{
struct debug_event *event;
struct list *ptr;
struct debug_ctx *debug_ctx = (struct debug_ctx *)obj;
assert( obj->ops == &debug_ctx_ops );
/* free all pending events */
while ((event = debug_ctx->event_head) != NULL) unlink_event( debug_ctx, event );
while ((ptr = list_head( &debug_ctx->event_queue )))
unlink_event( debug_ctx, LIST_ENTRY( ptr, struct debug_event, entry ));
}
/* continue a debug event */
static int continue_debug_event( struct process *process, struct thread *thread, int status )
{
struct debug_event *event;
struct debug_ctx *debug_ctx = current->debug_ctx;
if (!debug_ctx || process->debugger != current || thread->process != process) goto error;
/* find the event in the queue */
for (event = debug_ctx->event_head; event; event = event->next)
if (debug_ctx && process->debugger == current && thread->process == process)
{
if (event->state != EVENT_SENT) continue;
if (event->sender == thread) break;
struct debug_event *event;
/* find the event in the queue */
LIST_FOR_EACH_ENTRY( event, &debug_ctx->event_queue, struct debug_event, entry )
{
if (event->state != EVENT_SENT) continue;
if (event->sender == thread)
{
assert( event->sender->debug_event == event );
event->status = status;
event->state = EVENT_CONTINUED;
wake_up( &event->obj, 0 );
unlink_event( debug_ctx, event );
resume_process( process );
return 1;
}
}
}
if (!event) goto error;
assert( event->sender->debug_event == event );
event->status = status;
event->state = EVENT_CONTINUED;
wake_up( &event->obj, 0 );
unlink_event( debug_ctx, event );
resume_process( process );
return 1;
error:
/* not debugging this process, or no such event */
set_error( STATUS_ACCESS_DENIED ); /* FIXME */
return 0;
@ -377,8 +365,6 @@ static struct debug_event *alloc_debug_event( struct thread *thread, int code,
/* build the event */
if (!(event = alloc_object( &debug_event_ops ))) return NULL;
event->next = NULL;
event->prev = NULL;
event->state = EVENT_QUEUED;
event->sender = (struct thread *)grab_object( thread );
event->debugger = (struct thread *)grab_object( debugger );
@ -468,7 +454,7 @@ int debugger_detach( struct process *process, struct thread *debugger )
/* find the event in the queue
* FIXME: could loop on process' threads and look the debug_event field */
for (event = debug_ctx->event_head; event; event = event->next)
LIST_FOR_EACH_ENTRY( event, &debug_ctx->event_queue, struct debug_event, entry )
{
if (event->state != EVENT_QUEUED) continue;
@ -481,6 +467,7 @@ int debugger_detach( struct process *process, struct thread *debugger )
unlink_event( debug_ctx, event );
/* from queued debug event */
resume_process( process );
break;
}
}
@ -529,9 +516,8 @@ int set_process_debugger( struct process *process, struct thread *debugger )
if (!debugger->debug_ctx) /* need to allocate a context */
{
if (!(debug_ctx = alloc_object( &debug_ctx_ops ))) return 0;
debug_ctx->event_head = NULL;
debug_ctx->event_tail = NULL;
debug_ctx->kill_on_exit = 1;
list_init( &debug_ctx->event_queue );
debugger->debug_ctx = debug_ctx;
}
process->debugger = debugger;