1052 lines
31 KiB
C
1052 lines
31 KiB
C
/*
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* Server-side thread management
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*
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* Copyright (C) 1998 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <time.h>
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#ifdef HAVE_POLL_H
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#include <poll.h>
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#endif
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#include "windef.h"
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#include "file.h"
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#include "handle.h"
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#include "process.h"
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#include "thread.h"
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#include "request.h"
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#include "user.h"
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#include "security.h"
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/* thread queues */
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struct thread_wait
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{
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struct thread_wait *next; /* next wait structure for this thread */
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struct thread *thread; /* owner thread */
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int count; /* count of objects */
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int flags;
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void *cookie; /* magic cookie to return to client */
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struct timeval timeout;
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struct timeout_user *user;
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struct wait_queue_entry queues[1];
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};
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/* asynchronous procedure calls */
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struct thread_apc
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{
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struct list entry; /* queue linked list */
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struct object *owner; /* object that queued this apc */
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void *func; /* function to call in client */
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enum apc_type type; /* type of apc function */
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int nb_args; /* number of arguments */
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void *arg1; /* function arguments */
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void *arg2;
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void *arg3;
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};
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/* thread operations */
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static void dump_thread( struct object *obj, int verbose );
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static int thread_signaled( struct object *obj, struct thread *thread );
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static void thread_poll_event( struct fd *fd, int event );
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static void destroy_thread( struct object *obj );
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static struct thread_apc *thread_dequeue_apc( struct thread *thread, int system_only );
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static const struct object_ops thread_ops =
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{
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sizeof(struct thread), /* size */
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dump_thread, /* dump */
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add_queue, /* add_queue */
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remove_queue, /* remove_queue */
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thread_signaled, /* signaled */
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no_satisfied, /* satisfied */
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no_signal, /* signal */
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no_get_fd, /* get_fd */
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no_close_handle, /* close_handle */
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destroy_thread /* destroy */
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};
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static const struct fd_ops thread_fd_ops =
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{
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NULL, /* get_poll_events */
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thread_poll_event, /* poll_event */
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no_flush, /* flush */
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no_get_file_info, /* get_file_info */
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no_queue_async, /* queue_async */
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no_cancel_async /* cancel_async */
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};
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static struct list thread_list = LIST_INIT(thread_list);
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/* initialize the structure for a newly allocated thread */
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inline static void init_thread_structure( struct thread *thread )
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{
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int i;
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thread->unix_pid = -1; /* not known yet */
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thread->unix_tid = -1; /* not known yet */
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thread->context = NULL;
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thread->teb = NULL;
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thread->debug_ctx = NULL;
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thread->debug_event = NULL;
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thread->queue = NULL;
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thread->wait = NULL;
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thread->error = 0;
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thread->req_data = NULL;
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thread->req_toread = 0;
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thread->reply_data = NULL;
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thread->reply_towrite = 0;
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thread->request_fd = NULL;
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thread->reply_fd = NULL;
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thread->wait_fd = NULL;
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thread->state = RUNNING;
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thread->attached = 0;
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thread->exit_code = 0;
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thread->priority = THREAD_PRIORITY_NORMAL;
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thread->affinity = 1;
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thread->suspend = 0;
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thread->creation_time = time(NULL);
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thread->exit_time = 0;
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thread->desktop_users = 0;
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list_init( &thread->mutex_list );
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list_init( &thread->system_apc );
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list_init( &thread->user_apc );
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for (i = 0; i < MAX_INFLIGHT_FDS; i++)
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thread->inflight[i].server = thread->inflight[i].client = -1;
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}
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/* check if address looks valid for a client-side data structure (TEB etc.) */
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static inline int is_valid_address( void *addr )
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{
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return addr && !((unsigned int)addr % sizeof(int));
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}
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/* create a new thread */
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struct thread *create_thread( int fd, struct process *process )
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{
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struct thread *thread;
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if (!(thread = alloc_object( &thread_ops ))) return NULL;
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init_thread_structure( thread );
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thread->process = (struct process *)grab_object( process );
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thread->desktop = process->desktop;
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if (!current) current = thread;
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list_add_head( &thread_list, &thread->entry );
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if (!(thread->id = alloc_ptid( thread )))
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{
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release_object( thread );
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return NULL;
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}
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if (!(thread->request_fd = create_anonymous_fd( &thread_fd_ops, fd, &thread->obj )))
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{
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release_object( thread );
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return NULL;
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}
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thread->token = (struct token *) grab_object( process->token );
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set_fd_events( thread->request_fd, POLLIN ); /* start listening to events */
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add_process_thread( thread->process, thread );
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return thread;
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}
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/* handle a client event */
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static void thread_poll_event( struct fd *fd, int event )
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{
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struct thread *thread = get_fd_user( fd );
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assert( thread->obj.ops == &thread_ops );
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if (event & (POLLERR | POLLHUP)) kill_thread( thread, 0 );
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else if (event & POLLIN) read_request( thread );
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else if (event & POLLOUT) write_reply( thread );
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}
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/* cleanup everything that is no longer needed by a dead thread */
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/* used by destroy_thread and kill_thread */
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static void cleanup_thread( struct thread *thread )
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{
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int i;
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struct thread_apc *apc;
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while ((apc = thread_dequeue_apc( thread, 0 ))) free( apc );
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if (thread->req_data) free( thread->req_data );
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if (thread->reply_data) free( thread->reply_data );
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if (thread->request_fd) release_object( thread->request_fd );
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if (thread->reply_fd) release_object( thread->reply_fd );
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if (thread->wait_fd) release_object( thread->wait_fd );
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free_msg_queue( thread );
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cleanup_clipboard_thread(thread);
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destroy_thread_windows( thread );
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close_thread_desktop( thread );
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for (i = 0; i < MAX_INFLIGHT_FDS; i++)
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{
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if (thread->inflight[i].client != -1)
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{
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close( thread->inflight[i].server );
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thread->inflight[i].client = thread->inflight[i].server = -1;
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}
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}
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thread->req_data = NULL;
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thread->reply_data = NULL;
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thread->request_fd = NULL;
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thread->reply_fd = NULL;
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thread->wait_fd = NULL;
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thread->desktop = 0;
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}
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/* destroy a thread when its refcount is 0 */
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static void destroy_thread( struct object *obj )
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{
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struct thread_apc *apc;
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struct thread *thread = (struct thread *)obj;
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assert( obj->ops == &thread_ops );
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assert( !thread->debug_ctx ); /* cannot still be debugging something */
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list_remove( &thread->entry );
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while ((apc = thread_dequeue_apc( thread, 0 ))) free( apc );
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cleanup_thread( thread );
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release_object( thread->process );
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if (thread->id) free_ptid( thread->id );
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if (thread->token) release_object( thread->token );
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}
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/* dump a thread on stdout for debugging purposes */
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static void dump_thread( struct object *obj, int verbose )
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{
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struct thread *thread = (struct thread *)obj;
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assert( obj->ops == &thread_ops );
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fprintf( stderr, "Thread id=%04x unix pid=%d unix tid=%d teb=%p state=%d\n",
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thread->id, thread->unix_pid, thread->unix_tid, thread->teb, thread->state );
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}
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static int thread_signaled( struct object *obj, struct thread *thread )
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{
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struct thread *mythread = (struct thread *)obj;
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return (mythread->state == TERMINATED);
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}
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/* get a thread pointer from a thread id (and increment the refcount) */
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struct thread *get_thread_from_id( thread_id_t id )
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{
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struct object *obj = get_ptid_entry( id );
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if (obj && obj->ops == &thread_ops) return (struct thread *)grab_object( obj );
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set_error( STATUS_INVALID_CID );
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return NULL;
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}
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/* get a thread from a handle (and increment the refcount) */
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struct thread *get_thread_from_handle( obj_handle_t handle, unsigned int access )
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{
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return (struct thread *)get_handle_obj( current->process, handle,
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access, &thread_ops );
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}
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/* find a thread from a Unix pid */
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struct thread *get_thread_from_pid( int pid )
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{
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struct thread *thread;
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LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
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{
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if (thread->unix_tid == pid) return thread;
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}
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LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
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{
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if (thread->unix_pid == pid) return thread;
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}
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return NULL;
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}
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/* set all information about a thread */
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static void set_thread_info( struct thread *thread,
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const struct set_thread_info_request *req )
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{
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if (req->mask & SET_THREAD_INFO_PRIORITY)
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thread->priority = req->priority;
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if (req->mask & SET_THREAD_INFO_AFFINITY)
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{
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if (req->affinity != 1) set_error( STATUS_INVALID_PARAMETER );
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else thread->affinity = req->affinity;
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}
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if (req->mask & SET_THREAD_INFO_TOKEN)
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security_set_thread_token( thread, req->token );
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}
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/* stop a thread (at the Unix level) */
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void stop_thread( struct thread *thread )
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{
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/* can't stop a thread while initialisation is in progress */
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if (is_process_init_done(thread->process)) send_thread_signal( thread, SIGUSR1 );
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}
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/* suspend a thread */
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static int suspend_thread( struct thread *thread )
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{
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int old_count = thread->suspend;
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if (thread->suspend < MAXIMUM_SUSPEND_COUNT)
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{
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if (!(thread->process->suspend + thread->suspend++)) stop_thread( thread );
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}
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else set_error( STATUS_SUSPEND_COUNT_EXCEEDED );
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return old_count;
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}
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/* resume a thread */
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static int resume_thread( struct thread *thread )
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{
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int old_count = thread->suspend;
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if (thread->suspend > 0)
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{
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if (!(--thread->suspend + thread->process->suspend)) wake_thread( thread );
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}
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return old_count;
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}
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/* add a thread to an object wait queue; return 1 if OK, 0 on error */
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int add_queue( struct object *obj, struct wait_queue_entry *entry )
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{
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grab_object( obj );
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entry->obj = obj;
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list_add_tail( &obj->wait_queue, &entry->entry );
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return 1;
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}
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/* remove a thread from an object wait queue */
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void remove_queue( struct object *obj, struct wait_queue_entry *entry )
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{
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list_remove( &entry->entry );
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release_object( obj );
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}
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/* finish waiting */
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static void end_wait( struct thread *thread )
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{
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struct thread_wait *wait = thread->wait;
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struct wait_queue_entry *entry;
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int i;
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assert( wait );
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for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
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entry->obj->ops->remove_queue( entry->obj, entry );
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if (wait->user) remove_timeout_user( wait->user );
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thread->wait = wait->next;
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free( wait );
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}
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/* build the thread wait structure */
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static int wait_on( int count, struct object *objects[], int flags, const abs_time_t *timeout )
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{
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struct thread_wait *wait;
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struct wait_queue_entry *entry;
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int i;
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if (!(wait = mem_alloc( sizeof(*wait) + (count-1) * sizeof(*entry) ))) return 0;
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wait->next = current->wait;
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wait->thread = current;
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wait->count = count;
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wait->flags = flags;
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wait->user = NULL;
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current->wait = wait;
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if (flags & SELECT_TIMEOUT)
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{
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wait->timeout.tv_sec = timeout->sec;
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wait->timeout.tv_usec = timeout->usec;
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}
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for (i = 0, entry = wait->queues; i < count; i++, entry++)
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{
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struct object *obj = objects[i];
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entry->thread = current;
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if (!obj->ops->add_queue( obj, entry ))
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{
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wait->count = i;
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end_wait( current );
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return 0;
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}
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}
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return 1;
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}
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/* check if the thread waiting condition is satisfied */
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static int check_wait( struct thread *thread )
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{
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int i, signaled;
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struct thread_wait *wait = thread->wait;
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struct wait_queue_entry *entry = wait->queues;
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/* Suspended threads may not acquire locks */
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if (thread->process->suspend + thread->suspend > 0) return -1;
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assert( wait );
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if (wait->flags & SELECT_ALL)
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{
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int not_ok = 0;
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/* Note: we must check them all anyway, as some objects may
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* want to do something when signaled, even if others are not */
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for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
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not_ok |= !entry->obj->ops->signaled( entry->obj, thread );
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if (not_ok) goto other_checks;
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/* Wait satisfied: tell it to all objects */
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signaled = 0;
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for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
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if (entry->obj->ops->satisfied( entry->obj, thread ))
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signaled = STATUS_ABANDONED_WAIT_0;
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return signaled;
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}
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else
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{
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for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
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{
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if (!entry->obj->ops->signaled( entry->obj, thread )) continue;
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/* Wait satisfied: tell it to the object */
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signaled = i;
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if (entry->obj->ops->satisfied( entry->obj, thread ))
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signaled = i + STATUS_ABANDONED_WAIT_0;
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return signaled;
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}
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}
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other_checks:
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if ((wait->flags & SELECT_INTERRUPTIBLE) && !list_empty(&thread->system_apc)) return STATUS_USER_APC;
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if ((wait->flags & SELECT_ALERTABLE) && !list_empty(&thread->user_apc)) return STATUS_USER_APC;
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if (wait->flags & SELECT_TIMEOUT)
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{
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struct timeval now;
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gettimeofday( &now, NULL );
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if (!time_before( &now, &wait->timeout )) return STATUS_TIMEOUT;
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}
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return -1;
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}
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/* send the wakeup signal to a thread */
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static int send_thread_wakeup( struct thread *thread, void *cookie, int signaled )
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{
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struct wake_up_reply reply;
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int ret;
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reply.cookie = cookie;
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reply.signaled = signaled;
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if ((ret = write( get_unix_fd( thread->wait_fd ), &reply, sizeof(reply) )) == sizeof(reply))
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return 0;
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if (ret >= 0)
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fatal_protocol_error( thread, "partial wakeup write %d\n", ret );
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else if (errno == EPIPE)
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kill_thread( thread, 0 ); /* normal death */
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else
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fatal_protocol_perror( thread, "write" );
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return -1;
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}
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|
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/* attempt to wake up a thread */
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/* return >0 if OK, 0 if the wait condition is still not satisfied */
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int wake_thread( struct thread *thread )
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{
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int signaled, count;
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void *cookie;
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for (count = 0; thread->wait; count++)
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{
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if ((signaled = check_wait( thread )) == -1) break;
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cookie = thread->wait->cookie;
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if (debug_level) fprintf( stderr, "%04x: *wakeup* signaled=%d cookie=%p\n",
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thread->id, signaled, cookie );
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end_wait( thread );
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if (send_thread_wakeup( thread, cookie, signaled ) == -1) /* error */
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break;
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}
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return count;
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}
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|
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/* thread wait timeout */
|
|
static void thread_timeout( void *ptr )
|
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{
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struct thread_wait *wait = ptr;
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struct thread *thread = wait->thread;
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void *cookie = wait->cookie;
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|
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wait->user = NULL;
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if (thread->wait != wait) return; /* not the top-level wait, ignore it */
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if (thread->suspend + thread->process->suspend > 0) return; /* suspended, ignore it */
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|
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if (debug_level) fprintf( stderr, "%04x: *wakeup* signaled=%d cookie=%p\n",
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thread->id, STATUS_TIMEOUT, cookie );
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end_wait( thread );
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if (send_thread_wakeup( thread, cookie, STATUS_TIMEOUT ) == -1) return;
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/* check if other objects have become signaled in the meantime */
|
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wake_thread( thread );
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}
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|
|
|
/* try signaling an event flag, a semaphore or a mutex */
|
|
static int signal_object( obj_handle_t handle )
|
|
{
|
|
struct object *obj;
|
|
int ret = 0;
|
|
|
|
obj = get_handle_obj( current->process, handle, 0, NULL );
|
|
if (obj)
|
|
{
|
|
ret = obj->ops->signal( obj, get_handle_access( current->process, handle ));
|
|
release_object( obj );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* select on a list of handles */
|
|
static void select_on( int count, void *cookie, const obj_handle_t *handles,
|
|
int flags, const abs_time_t *timeout, obj_handle_t signal_obj )
|
|
{
|
|
int ret, i;
|
|
struct object *objects[MAXIMUM_WAIT_OBJECTS];
|
|
|
|
if ((count < 0) || (count > MAXIMUM_WAIT_OBJECTS))
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return;
|
|
}
|
|
for (i = 0; i < count; i++)
|
|
{
|
|
if (!(objects[i] = get_handle_obj( current->process, handles[i], SYNCHRONIZE, NULL )))
|
|
break;
|
|
}
|
|
|
|
if (i < count) goto done;
|
|
if (!wait_on( count, objects, flags, timeout )) goto done;
|
|
|
|
/* signal the object */
|
|
if (signal_obj)
|
|
{
|
|
if (!signal_object( signal_obj ))
|
|
{
|
|
end_wait( current );
|
|
goto done;
|
|
}
|
|
/* check if we woke ourselves up */
|
|
if (!current->wait) goto done;
|
|
}
|
|
|
|
if ((ret = check_wait( current )) != -1)
|
|
{
|
|
/* condition is already satisfied */
|
|
end_wait( current );
|
|
set_error( ret );
|
|
goto done;
|
|
}
|
|
|
|
/* now we need to wait */
|
|
if (flags & SELECT_TIMEOUT)
|
|
{
|
|
if (!(current->wait->user = add_timeout_user( ¤t->wait->timeout,
|
|
thread_timeout, current->wait )))
|
|
{
|
|
end_wait( current );
|
|
goto done;
|
|
}
|
|
}
|
|
current->wait->cookie = cookie;
|
|
set_error( STATUS_PENDING );
|
|
|
|
done:
|
|
while (--i >= 0) release_object( objects[i] );
|
|
}
|
|
|
|
/* attempt to wake threads sleeping on the object wait queue */
|
|
void wake_up( struct object *obj, int max )
|
|
{
|
|
struct list *ptr, *next;
|
|
|
|
LIST_FOR_EACH_SAFE( ptr, next, &obj->wait_queue )
|
|
{
|
|
struct wait_queue_entry *entry = LIST_ENTRY( ptr, struct wait_queue_entry, entry );
|
|
if (wake_thread( entry->thread ))
|
|
{
|
|
if (max && !--max) break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* queue an async procedure call */
|
|
int thread_queue_apc( struct thread *thread, struct object *owner, void *func,
|
|
enum apc_type type, int system, void *arg1, void *arg2, void *arg3 )
|
|
{
|
|
struct thread_apc *apc;
|
|
struct list *queue = system ? &thread->system_apc : &thread->user_apc;
|
|
|
|
/* cancel a possible previous APC with the same owner */
|
|
if (owner) thread_cancel_apc( thread, owner, system );
|
|
if (thread->state == TERMINATED) return 0;
|
|
|
|
if (!(apc = mem_alloc( sizeof(*apc) ))) return 0;
|
|
apc->owner = owner;
|
|
apc->func = func;
|
|
apc->type = type;
|
|
apc->arg1 = arg1;
|
|
apc->arg2 = arg2;
|
|
apc->arg3 = arg3;
|
|
list_add_tail( queue, &apc->entry );
|
|
if (!list_prev( queue, &apc->entry )) /* first one */
|
|
wake_thread( thread );
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* cancel the async procedure call owned by a specific object */
|
|
void thread_cancel_apc( struct thread *thread, struct object *owner, int system )
|
|
{
|
|
struct thread_apc *apc;
|
|
struct list *queue = system ? &thread->system_apc : &thread->user_apc;
|
|
LIST_FOR_EACH_ENTRY( apc, queue, struct thread_apc, entry )
|
|
{
|
|
if (apc->owner != owner) continue;
|
|
list_remove( &apc->entry );
|
|
free( apc );
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* remove the head apc from the queue; the returned pointer must be freed by the caller */
|
|
static struct thread_apc *thread_dequeue_apc( struct thread *thread, int system_only )
|
|
{
|
|
struct thread_apc *apc = NULL;
|
|
struct list *ptr = list_head( &thread->system_apc );
|
|
|
|
if (!ptr && !system_only) ptr = list_head( &thread->user_apc );
|
|
if (ptr)
|
|
{
|
|
apc = LIST_ENTRY( ptr, struct thread_apc, entry );
|
|
list_remove( ptr );
|
|
}
|
|
return apc;
|
|
}
|
|
|
|
/* add an fd to the inflight list */
|
|
/* return list index, or -1 on error */
|
|
int thread_add_inflight_fd( struct thread *thread, int client, int server )
|
|
{
|
|
int i;
|
|
|
|
if (server == -1) return -1;
|
|
if (client == -1)
|
|
{
|
|
close( server );
|
|
return -1;
|
|
}
|
|
|
|
/* first check if we already have an entry for this fd */
|
|
for (i = 0; i < MAX_INFLIGHT_FDS; i++)
|
|
if (thread->inflight[i].client == client)
|
|
{
|
|
close( thread->inflight[i].server );
|
|
thread->inflight[i].server = server;
|
|
return i;
|
|
}
|
|
|
|
/* now find a free spot to store it */
|
|
for (i = 0; i < MAX_INFLIGHT_FDS; i++)
|
|
if (thread->inflight[i].client == -1)
|
|
{
|
|
thread->inflight[i].client = client;
|
|
thread->inflight[i].server = server;
|
|
return i;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/* get an inflight fd and purge it from the list */
|
|
/* the fd must be closed when no longer used */
|
|
int thread_get_inflight_fd( struct thread *thread, int client )
|
|
{
|
|
int i, ret;
|
|
|
|
if (client == -1) return -1;
|
|
|
|
do
|
|
{
|
|
for (i = 0; i < MAX_INFLIGHT_FDS; i++)
|
|
{
|
|
if (thread->inflight[i].client == client)
|
|
{
|
|
ret = thread->inflight[i].server;
|
|
thread->inflight[i].server = thread->inflight[i].client = -1;
|
|
return ret;
|
|
}
|
|
}
|
|
} while (!receive_fd( thread->process )); /* in case it is still in the socket buffer */
|
|
return -1;
|
|
}
|
|
|
|
/* retrieve an LDT selector entry */
|
|
static void get_selector_entry( struct thread *thread, int entry,
|
|
unsigned int *base, unsigned int *limit,
|
|
unsigned char *flags )
|
|
{
|
|
if (!thread->process->ldt_copy)
|
|
{
|
|
set_error( STATUS_ACCESS_DENIED );
|
|
return;
|
|
}
|
|
if (entry >= 8192)
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER ); /* FIXME */
|
|
return;
|
|
}
|
|
if (suspend_for_ptrace( thread ))
|
|
{
|
|
unsigned char flags_buf[4];
|
|
int *addr = (int *)thread->process->ldt_copy + entry;
|
|
if (read_thread_int( thread, addr, (int *)base ) == -1) goto done;
|
|
if (read_thread_int( thread, addr + 8192, (int *)limit ) == -1) goto done;
|
|
addr = (int *)thread->process->ldt_copy + 2*8192 + (entry >> 2);
|
|
if (read_thread_int( thread, addr, (int *)flags_buf ) == -1) goto done;
|
|
*flags = flags_buf[entry & 3];
|
|
done:
|
|
resume_after_ptrace( thread );
|
|
}
|
|
}
|
|
|
|
/* kill a thread on the spot */
|
|
void kill_thread( struct thread *thread, int violent_death )
|
|
{
|
|
if (thread->state == TERMINATED) return; /* already killed */
|
|
thread->state = TERMINATED;
|
|
thread->exit_time = time(NULL);
|
|
if (current == thread) current = NULL;
|
|
if (debug_level)
|
|
fprintf( stderr,"%04x: *killed* exit_code=%d\n",
|
|
thread->id, thread->exit_code );
|
|
if (thread->wait)
|
|
{
|
|
while (thread->wait) end_wait( thread );
|
|
send_thread_wakeup( thread, NULL, STATUS_PENDING );
|
|
/* if it is waiting on the socket, we don't need to send a SIGTERM */
|
|
violent_death = 0;
|
|
}
|
|
kill_console_processes( thread, 0 );
|
|
debug_exit_thread( thread );
|
|
abandon_mutexes( thread );
|
|
remove_process_thread( thread->process, thread );
|
|
wake_up( &thread->obj, 0 );
|
|
if (violent_death) send_thread_signal( thread, SIGTERM );
|
|
cleanup_thread( thread );
|
|
release_object( thread );
|
|
}
|
|
|
|
/* take a snapshot of currently running threads */
|
|
struct thread_snapshot *thread_snap( int *count )
|
|
{
|
|
struct thread_snapshot *snapshot, *ptr;
|
|
struct thread *thread;
|
|
int total = 0;
|
|
|
|
LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
|
|
if (thread->state != TERMINATED) total++;
|
|
if (!total || !(snapshot = mem_alloc( sizeof(*snapshot) * total ))) return NULL;
|
|
ptr = snapshot;
|
|
LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
|
|
{
|
|
if (thread->state == TERMINATED) continue;
|
|
ptr->thread = thread;
|
|
ptr->count = thread->obj.refcount;
|
|
ptr->priority = thread->priority;
|
|
grab_object( thread );
|
|
ptr++;
|
|
}
|
|
*count = total;
|
|
return snapshot;
|
|
}
|
|
|
|
/* gets the current impersonation token */
|
|
struct token *thread_get_impersonation_token( struct thread *thread )
|
|
{
|
|
if (thread->token)
|
|
return thread->token;
|
|
else
|
|
return thread->process->token;
|
|
}
|
|
|
|
/* create a new thread */
|
|
DECL_HANDLER(new_thread)
|
|
{
|
|
struct thread *thread;
|
|
int request_fd = thread_get_inflight_fd( current, req->request_fd );
|
|
|
|
if (request_fd == -1 || fcntl( request_fd, F_SETFL, O_NONBLOCK ) == -1)
|
|
{
|
|
if (request_fd != -1) close( request_fd );
|
|
set_error( STATUS_INVALID_HANDLE );
|
|
return;
|
|
}
|
|
|
|
if ((thread = create_thread( request_fd, current->process )))
|
|
{
|
|
if (req->suspend) thread->suspend++;
|
|
reply->tid = get_thread_id( thread );
|
|
if ((reply->handle = alloc_handle( current->process, thread,
|
|
THREAD_ALL_ACCESS, req->inherit )))
|
|
{
|
|
/* thread object will be released when the thread gets killed */
|
|
return;
|
|
}
|
|
kill_thread( thread, 1 );
|
|
}
|
|
}
|
|
|
|
/* initialize a new thread */
|
|
DECL_HANDLER(init_thread)
|
|
{
|
|
struct process *process = current->process;
|
|
int reply_fd = thread_get_inflight_fd( current, req->reply_fd );
|
|
int wait_fd = thread_get_inflight_fd( current, req->wait_fd );
|
|
|
|
if (current->unix_pid != -1)
|
|
{
|
|
fatal_protocol_error( current, "init_thread: already running\n" );
|
|
goto error;
|
|
}
|
|
if (reply_fd == -1 || fcntl( reply_fd, F_SETFL, O_NONBLOCK ) == -1)
|
|
{
|
|
fatal_protocol_error( current, "bad reply fd\n" );
|
|
goto error;
|
|
}
|
|
if (wait_fd == -1)
|
|
{
|
|
fatal_protocol_error( current, "bad wait fd\n" );
|
|
goto error;
|
|
}
|
|
if (!(current->reply_fd = create_anonymous_fd( &thread_fd_ops, reply_fd, ¤t->obj )))
|
|
{
|
|
reply_fd = -1;
|
|
fatal_protocol_error( current, "could not allocate reply fd\n" );
|
|
goto error;
|
|
}
|
|
if (!(current->wait_fd = create_anonymous_fd( &thread_fd_ops, wait_fd, ¤t->obj )))
|
|
return;
|
|
|
|
if (!is_valid_address(req->teb) || !is_valid_address(req->peb) || !is_valid_address(req->ldt_copy))
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return;
|
|
}
|
|
|
|
current->unix_pid = req->unix_pid;
|
|
current->unix_tid = req->unix_tid;
|
|
current->teb = req->teb;
|
|
|
|
if (!process->peb) /* first thread, initialize the process too */
|
|
{
|
|
process->peb = req->peb;
|
|
process->ldt_copy = req->ldt_copy;
|
|
reply->info_size = init_process( current );
|
|
}
|
|
else
|
|
{
|
|
if (current->suspend + process->suspend > 0) stop_thread( current );
|
|
generate_debug_event( current, CREATE_THREAD_DEBUG_EVENT, req->entry );
|
|
}
|
|
debug_level = max( debug_level, req->debug_level );
|
|
|
|
reply->pid = get_process_id( process );
|
|
reply->tid = get_thread_id( current );
|
|
reply->version = SERVER_PROTOCOL_VERSION;
|
|
reply->server_start = server_start_time;
|
|
return;
|
|
|
|
error:
|
|
if (reply_fd != -1) close( reply_fd );
|
|
if (wait_fd != -1) close( wait_fd );
|
|
}
|
|
|
|
/* terminate a thread */
|
|
DECL_HANDLER(terminate_thread)
|
|
{
|
|
struct thread *thread;
|
|
|
|
reply->self = 0;
|
|
reply->last = 0;
|
|
if ((thread = get_thread_from_handle( req->handle, THREAD_TERMINATE )))
|
|
{
|
|
thread->exit_code = req->exit_code;
|
|
if (thread != current) kill_thread( thread, 1 );
|
|
else
|
|
{
|
|
reply->self = 1;
|
|
reply->last = (thread->process->running_threads == 1);
|
|
}
|
|
release_object( thread );
|
|
}
|
|
}
|
|
|
|
/* open a handle to a thread */
|
|
DECL_HANDLER(open_thread)
|
|
{
|
|
struct thread *thread = get_thread_from_id( req->tid );
|
|
|
|
reply->handle = 0;
|
|
if (thread)
|
|
{
|
|
reply->handle = alloc_handle( current->process, thread, req->access, req->inherit );
|
|
release_object( thread );
|
|
}
|
|
}
|
|
|
|
/* fetch information about a thread */
|
|
DECL_HANDLER(get_thread_info)
|
|
{
|
|
struct thread *thread;
|
|
obj_handle_t handle = req->handle;
|
|
|
|
if (!handle) thread = get_thread_from_id( req->tid_in );
|
|
else thread = get_thread_from_handle( req->handle, THREAD_QUERY_INFORMATION );
|
|
|
|
if (thread)
|
|
{
|
|
reply->pid = get_process_id( thread->process );
|
|
reply->tid = get_thread_id( thread );
|
|
reply->teb = thread->teb;
|
|
reply->exit_code = (thread->state == TERMINATED) ? thread->exit_code : STILL_ACTIVE;
|
|
reply->priority = thread->priority;
|
|
reply->affinity = thread->affinity;
|
|
reply->creation_time = thread->creation_time;
|
|
reply->exit_time = thread->exit_time;
|
|
|
|
release_object( thread );
|
|
}
|
|
}
|
|
|
|
/* set information about a thread */
|
|
DECL_HANDLER(set_thread_info)
|
|
{
|
|
struct thread *thread;
|
|
|
|
if ((thread = get_thread_from_handle( req->handle, THREAD_SET_INFORMATION )))
|
|
{
|
|
set_thread_info( thread, req );
|
|
release_object( thread );
|
|
}
|
|
}
|
|
|
|
/* suspend a thread */
|
|
DECL_HANDLER(suspend_thread)
|
|
{
|
|
struct thread *thread;
|
|
|
|
if ((thread = get_thread_from_handle( req->handle, THREAD_SUSPEND_RESUME )))
|
|
{
|
|
if (thread->state == TERMINATED) set_error( STATUS_ACCESS_DENIED );
|
|
else reply->count = suspend_thread( thread );
|
|
release_object( thread );
|
|
}
|
|
}
|
|
|
|
/* resume a thread */
|
|
DECL_HANDLER(resume_thread)
|
|
{
|
|
struct thread *thread;
|
|
|
|
if ((thread = get_thread_from_handle( req->handle, THREAD_SUSPEND_RESUME )))
|
|
{
|
|
if (thread->state == TERMINATED) set_error( STATUS_ACCESS_DENIED );
|
|
else reply->count = resume_thread( thread );
|
|
release_object( thread );
|
|
}
|
|
}
|
|
|
|
/* select on a handle list */
|
|
DECL_HANDLER(select)
|
|
{
|
|
int count = get_req_data_size() / sizeof(int);
|
|
select_on( count, req->cookie, get_req_data(), req->flags, &req->timeout, req->signal );
|
|
}
|
|
|
|
/* queue an APC for a thread */
|
|
DECL_HANDLER(queue_apc)
|
|
{
|
|
struct thread *thread;
|
|
if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
|
|
{
|
|
thread_queue_apc( thread, NULL, req->func, APC_USER, !req->user,
|
|
req->arg1, req->arg2, req->arg3 );
|
|
release_object( thread );
|
|
}
|
|
}
|
|
|
|
/* get next APC to call */
|
|
DECL_HANDLER(get_apc)
|
|
{
|
|
struct thread_apc *apc;
|
|
|
|
for (;;)
|
|
{
|
|
if (!(apc = thread_dequeue_apc( current, !req->alertable )))
|
|
{
|
|
/* no more APCs */
|
|
reply->func = NULL;
|
|
reply->type = APC_NONE;
|
|
return;
|
|
}
|
|
/* Optimization: ignore APCs that have a NULL func; they are only used
|
|
* to wake up a thread, but since we got here the thread woke up already.
|
|
* Exception: for APC_ASYNC_IO, func == NULL is legal.
|
|
*/
|
|
if (apc->func || apc->type == APC_ASYNC_IO) break;
|
|
free( apc );
|
|
}
|
|
reply->func = apc->func;
|
|
reply->type = apc->type;
|
|
reply->arg1 = apc->arg1;
|
|
reply->arg2 = apc->arg2;
|
|
reply->arg3 = apc->arg3;
|
|
free( apc );
|
|
}
|
|
|
|
/* fetch a selector entry for a thread */
|
|
DECL_HANDLER(get_selector_entry)
|
|
{
|
|
struct thread *thread;
|
|
if ((thread = get_thread_from_handle( req->handle, THREAD_QUERY_INFORMATION )))
|
|
{
|
|
get_selector_entry( thread, req->entry, &reply->base, &reply->limit, &reply->flags );
|
|
release_object( thread );
|
|
}
|
|
}
|