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https://github.com/reactos/wine.git
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1609 lines
49 KiB
C
1609 lines
49 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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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#ifdef HAVE_SCHED_H
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#include <sched.h>
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#endif
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.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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#ifdef __i386__
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static const unsigned int supported_cpus = CPU_FLAG(CPU_x86);
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#elif defined(__x86_64__)
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static const unsigned int supported_cpus = CPU_FLAG(CPU_x86_64) | CPU_FLAG(CPU_x86);
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#elif defined(__powerpc__)
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static const unsigned int supported_cpus = CPU_FLAG(CPU_POWERPC);
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#elif defined(__arm__)
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static const unsigned int supported_cpus = CPU_FLAG(CPU_ARM);
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#elif defined(__aarch64__)
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static const unsigned int supported_cpus = CPU_FLAG(CPU_ARM64);
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#else
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#error Unsupported CPU
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#endif
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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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client_ptr_t cookie; /* magic cookie to return to client */
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timeout_t 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 object obj; /* object header */
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struct list entry; /* queue linked list */
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struct thread *caller; /* thread that queued this apc */
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struct object *owner; /* object that queued this apc */
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int executed; /* has it been executed by the client? */
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apc_call_t call; /* call arguments */
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apc_result_t result; /* call results once executed */
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};
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static void dump_thread_apc( struct object *obj, int verbose );
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static int thread_apc_signaled( struct object *obj, struct thread *thread );
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static void thread_apc_destroy( struct object *obj );
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static void clear_apc_queue( struct list *queue );
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static const struct object_ops thread_apc_ops =
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{
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sizeof(struct thread_apc), /* size */
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dump_thread_apc, /* dump */
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no_get_type, /* get_type */
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add_queue, /* add_queue */
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remove_queue, /* remove_queue */
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thread_apc_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_map_access, /* map_access */
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default_get_sd, /* get_sd */
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default_set_sd, /* set_sd */
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no_lookup_name, /* lookup_name */
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no_open_file, /* open_file */
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no_close_handle, /* close_handle */
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thread_apc_destroy /* destroy */
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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 unsigned int thread_map_access( struct object *obj, unsigned int access );
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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 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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no_get_type, /* get_type */
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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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thread_map_access, /* map_access */
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default_get_sd, /* get_sd */
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default_set_sd, /* set_sd */
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no_lookup_name, /* lookup_name */
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no_open_file, /* open_file */
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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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NULL, /* flush */
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NULL, /* get_fd_type */
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NULL, /* ioctl */
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NULL, /* queue_async */
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NULL, /* reselect_async */
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NULL /* 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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static inline 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->suspend_context = NULL;
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thread->teb = 0;
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thread->debug_ctx = NULL;
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thread->debug_event = NULL;
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thread->debug_break = 0;
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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->exit_code = 0;
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thread->priority = 0;
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thread->suspend = 0;
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thread->desktop_users = 0;
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thread->token = NULL;
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thread->creation_time = current_time;
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thread->exit_time = 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( client_ptr_t addr )
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{
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return addr && !(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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thread->affinity = process->affinity;
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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, 0 )))
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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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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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grab_object( thread );
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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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release_object( 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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clear_apc_queue( &thread->system_apc );
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clear_apc_queue( &thread->user_apc );
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free( thread->req_data );
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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( thread->suspend_context );
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cleanup_clipboard_thread(thread);
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destroy_thread_windows( thread );
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free_msg_queue( 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->context = NULL;
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thread->suspend_context = 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 *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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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 state=%d\n",
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thread->id, thread->unix_pid, thread->unix_tid, 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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static unsigned int thread_map_access( struct object *obj, unsigned int access )
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{
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if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ | SYNCHRONIZE;
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if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE | SYNCHRONIZE;
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if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
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if (access & GENERIC_ALL) access |= THREAD_ALL_ACCESS;
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return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
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}
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static void dump_thread_apc( struct object *obj, int verbose )
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{
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struct thread_apc *apc = (struct thread_apc *)obj;
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assert( obj->ops == &thread_apc_ops );
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fprintf( stderr, "APC owner=%p type=%u\n", apc->owner, apc->call.type );
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}
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static int thread_apc_signaled( struct object *obj, struct thread *thread )
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{
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struct thread_apc *apc = (struct thread_apc *)obj;
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return apc->executed;
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}
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static void thread_apc_destroy( struct object *obj )
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{
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struct thread_apc *apc = (struct thread_apc *)obj;
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if (apc->caller) release_object( apc->caller );
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if (apc->owner) release_object( apc->owner );
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}
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/* queue an async procedure call */
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static struct thread_apc *create_apc( struct object *owner, const apc_call_t *call_data )
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{
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struct thread_apc *apc;
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if ((apc = alloc_object( &thread_apc_ops )))
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{
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apc->call = *call_data;
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apc->caller = NULL;
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apc->owner = owner;
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apc->executed = 0;
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apc->result.type = APC_NONE;
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if (owner) grab_object( owner );
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}
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return apc;
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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 tid */
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struct thread *get_thread_from_tid( int tid )
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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 == tid) return thread;
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}
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return NULL;
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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_pid == pid) return thread;
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}
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return NULL;
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}
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int set_thread_affinity( struct thread *thread, affinity_t affinity )
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{
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int ret = 0;
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#ifdef HAVE_SCHED_SETAFFINITY
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if (thread->unix_tid != -1)
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{
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cpu_set_t set;
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int i;
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affinity_t mask;
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CPU_ZERO( &set );
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for (i = 0, mask = 1; mask; i++, mask <<= 1)
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if (affinity & mask) CPU_SET( i, &set );
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ret = sched_setaffinity( thread->unix_tid, sizeof(set), &set );
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}
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#endif
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if (!ret) thread->affinity = affinity;
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return ret;
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}
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affinity_t get_thread_affinity( struct thread *thread )
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{
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affinity_t mask = 0;
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#ifdef HAVE_SCHED_SETAFFINITY
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if (thread->unix_tid != -1)
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{
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cpu_set_t set;
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unsigned int i;
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if (!sched_getaffinity( thread->unix_tid, sizeof(set), &set ))
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for (i = 0; i < 8 * sizeof(mask); i++)
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if (CPU_ISSET( i, &set )) mask |= 1 << i;
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}
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#endif
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if (!mask) mask = ~0;
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return mask;
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}
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#define THREAD_PRIORITY_REALTIME_HIGHEST 6
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#define THREAD_PRIORITY_REALTIME_LOWEST -7
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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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{
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int max = THREAD_PRIORITY_HIGHEST;
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int min = THREAD_PRIORITY_LOWEST;
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if (thread->process->priority == PROCESS_PRIOCLASS_REALTIME)
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{
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max = THREAD_PRIORITY_REALTIME_HIGHEST;
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min = THREAD_PRIORITY_REALTIME_LOWEST;
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}
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if ((req->priority >= min && req->priority <= max) ||
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req->priority == THREAD_PRIORITY_IDLE ||
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req->priority == THREAD_PRIORITY_TIME_CRITICAL)
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thread->priority = req->priority;
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else
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set_error( STATUS_INVALID_PARAMETER );
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}
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if (req->mask & SET_THREAD_INFO_AFFINITY)
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{
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if ((req->affinity & thread->process->affinity) != req->affinity)
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set_error( STATUS_INVALID_PARAMETER );
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else if (thread->state == TERMINATED)
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set_error( STATUS_ACCESS_DENIED );
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else if (set_thread_affinity( thread, req->affinity ))
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file_set_error();
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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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if (thread->context) return; /* already inside a debug event, no need for a signal */
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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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/* stop a thread if it's supposed to be suspended */
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void stop_thread_if_suspended( struct thread *thread )
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{
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if (thread->suspend + thread->process->suspend > 0) stop_thread( thread );
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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 */
|
|
static int resume_thread( struct thread *thread )
|
|
{
|
|
int old_count = thread->suspend;
|
|
if (thread->suspend > 0)
|
|
{
|
|
if (!(--thread->suspend + thread->process->suspend)) wake_thread( thread );
|
|
}
|
|
return old_count;
|
|
}
|
|
|
|
/* add a thread to an object wait queue; return 1 if OK, 0 on error */
|
|
int add_queue( struct object *obj, struct wait_queue_entry *entry )
|
|
{
|
|
grab_object( obj );
|
|
entry->obj = obj;
|
|
list_add_tail( &obj->wait_queue, &entry->entry );
|
|
return 1;
|
|
}
|
|
|
|
/* remove a thread from an object wait queue */
|
|
void remove_queue( struct object *obj, struct wait_queue_entry *entry )
|
|
{
|
|
list_remove( &entry->entry );
|
|
release_object( obj );
|
|
}
|
|
|
|
/* finish waiting */
|
|
static void end_wait( struct thread *thread )
|
|
{
|
|
struct thread_wait *wait = thread->wait;
|
|
struct wait_queue_entry *entry;
|
|
int i;
|
|
|
|
assert( wait );
|
|
thread->wait = wait->next;
|
|
for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
|
|
entry->obj->ops->remove_queue( entry->obj, entry );
|
|
if (wait->user) remove_timeout_user( wait->user );
|
|
free( wait );
|
|
}
|
|
|
|
/* build the thread wait structure */
|
|
static int wait_on( unsigned int count, struct object *objects[], int flags, timeout_t timeout )
|
|
{
|
|
struct thread_wait *wait;
|
|
struct wait_queue_entry *entry;
|
|
unsigned int i;
|
|
|
|
if (!(wait = mem_alloc( FIELD_OFFSET(struct thread_wait, queues[count]) ))) return 0;
|
|
wait->next = current->wait;
|
|
wait->thread = current;
|
|
wait->count = count;
|
|
wait->flags = flags;
|
|
wait->user = NULL;
|
|
wait->timeout = timeout;
|
|
current->wait = wait;
|
|
|
|
for (i = 0, entry = wait->queues; i < count; i++, entry++)
|
|
{
|
|
struct object *obj = objects[i];
|
|
entry->thread = current;
|
|
if (!obj->ops->add_queue( obj, entry ))
|
|
{
|
|
wait->count = i;
|
|
end_wait( current );
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* check if the thread waiting condition is satisfied */
|
|
static int check_wait( struct thread *thread )
|
|
{
|
|
int i, signaled;
|
|
struct thread_wait *wait = thread->wait;
|
|
struct wait_queue_entry *entry;
|
|
|
|
assert( wait );
|
|
|
|
if ((wait->flags & SELECT_INTERRUPTIBLE) && !list_empty( &thread->system_apc ))
|
|
return STATUS_USER_APC;
|
|
|
|
/* Suspended threads may not acquire locks, but they can run system APCs */
|
|
if (thread->process->suspend + thread->suspend > 0) return -1;
|
|
|
|
if (wait->flags & SELECT_ALL)
|
|
{
|
|
int not_ok = 0;
|
|
/* Note: we must check them all anyway, as some objects may
|
|
* want to do something when signaled, even if others are not */
|
|
for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
|
|
not_ok |= !entry->obj->ops->signaled( entry->obj, thread );
|
|
if (not_ok) goto other_checks;
|
|
/* Wait satisfied: tell it to all objects */
|
|
signaled = 0;
|
|
for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
|
|
if (entry->obj->ops->satisfied( entry->obj, thread ))
|
|
signaled = STATUS_ABANDONED_WAIT_0;
|
|
return signaled;
|
|
}
|
|
else
|
|
{
|
|
for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
|
|
{
|
|
if (!entry->obj->ops->signaled( entry->obj, thread )) continue;
|
|
/* Wait satisfied: tell it to the object */
|
|
signaled = i;
|
|
if (entry->obj->ops->satisfied( entry->obj, thread ))
|
|
signaled = i + STATUS_ABANDONED_WAIT_0;
|
|
return signaled;
|
|
}
|
|
}
|
|
|
|
other_checks:
|
|
if ((wait->flags & SELECT_ALERTABLE) && !list_empty(&thread->user_apc)) return STATUS_USER_APC;
|
|
if (wait->timeout <= current_time) return STATUS_TIMEOUT;
|
|
return -1;
|
|
}
|
|
|
|
/* send the wakeup signal to a thread */
|
|
static int send_thread_wakeup( struct thread *thread, client_ptr_t cookie, int signaled )
|
|
{
|
|
struct wake_up_reply reply;
|
|
int ret;
|
|
|
|
memset( &reply, 0, sizeof(reply) );
|
|
reply.cookie = cookie;
|
|
reply.signaled = signaled;
|
|
if ((ret = write( get_unix_fd( thread->wait_fd ), &reply, sizeof(reply) )) == sizeof(reply))
|
|
return 0;
|
|
if (ret >= 0)
|
|
fatal_protocol_error( thread, "partial wakeup write %d\n", ret );
|
|
else if (errno == EPIPE)
|
|
kill_thread( thread, 0 ); /* normal death */
|
|
else
|
|
fatal_protocol_perror( thread, "write" );
|
|
return -1;
|
|
}
|
|
|
|
/* attempt to wake up a thread */
|
|
/* return >0 if OK, 0 if the wait condition is still not satisfied */
|
|
int wake_thread( struct thread *thread )
|
|
{
|
|
int signaled, count;
|
|
client_ptr_t cookie;
|
|
|
|
for (count = 0; thread->wait; count++)
|
|
{
|
|
if ((signaled = check_wait( thread )) == -1) break;
|
|
|
|
cookie = thread->wait->cookie;
|
|
if (debug_level) fprintf( stderr, "%04x: *wakeup* signaled=%d\n", thread->id, signaled );
|
|
end_wait( thread );
|
|
if (send_thread_wakeup( thread, cookie, signaled ) == -1) /* error */
|
|
break;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
/* thread wait timeout */
|
|
static void thread_timeout( void *ptr )
|
|
{
|
|
struct thread_wait *wait = ptr;
|
|
struct thread *thread = wait->thread;
|
|
client_ptr_t cookie = wait->cookie;
|
|
|
|
wait->user = NULL;
|
|
if (thread->wait != wait) return; /* not the top-level wait, ignore it */
|
|
if (thread->suspend + thread->process->suspend > 0) return; /* suspended, ignore it */
|
|
|
|
if (debug_level) fprintf( stderr, "%04x: *wakeup* signaled=TIMEOUT\n", thread->id );
|
|
end_wait( thread );
|
|
if (send_thread_wakeup( thread, cookie, STATUS_TIMEOUT ) == -1) return;
|
|
/* check if other objects have become signaled in the meantime */
|
|
wake_thread( thread );
|
|
}
|
|
|
|
/* 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 timeout_t select_on( unsigned int count, client_ptr_t cookie, const obj_handle_t *handles,
|
|
int flags, timeout_t timeout, obj_handle_t signal_obj )
|
|
{
|
|
int ret;
|
|
unsigned int i;
|
|
struct object *objects[MAXIMUM_WAIT_OBJECTS];
|
|
|
|
if (timeout <= 0) timeout = current_time - timeout;
|
|
|
|
if (count > MAXIMUM_WAIT_OBJECTS)
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return 0;
|
|
}
|
|
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 (current->wait->timeout != TIMEOUT_INFINITE)
|
|
{
|
|
if (!(current->wait->user = add_timeout_user( current->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] );
|
|
return timeout;
|
|
}
|
|
|
|
/* attempt to wake threads sleeping on the object wait queue */
|
|
void wake_up( struct object *obj, int max )
|
|
{
|
|
struct list *ptr;
|
|
|
|
LIST_FOR_EACH( ptr, &obj->wait_queue )
|
|
{
|
|
struct wait_queue_entry *entry = LIST_ENTRY( ptr, struct wait_queue_entry, entry );
|
|
if (!wake_thread( entry->thread )) continue;
|
|
if (max && !--max) break;
|
|
/* restart at the head of the list since a wake up can change the object wait queue */
|
|
ptr = &obj->wait_queue;
|
|
}
|
|
}
|
|
|
|
/* return the apc queue to use for a given apc type */
|
|
static inline struct list *get_apc_queue( struct thread *thread, enum apc_type type )
|
|
{
|
|
switch(type)
|
|
{
|
|
case APC_NONE:
|
|
case APC_USER:
|
|
case APC_TIMER:
|
|
return &thread->user_apc;
|
|
default:
|
|
return &thread->system_apc;
|
|
}
|
|
}
|
|
|
|
/* check if thread is currently waiting for a (system) apc */
|
|
static inline int is_in_apc_wait( struct thread *thread )
|
|
{
|
|
return (thread->process->suspend || thread->suspend ||
|
|
(thread->wait && (thread->wait->flags & SELECT_INTERRUPTIBLE)));
|
|
}
|
|
|
|
/* queue an existing APC to a given thread */
|
|
static int queue_apc( struct process *process, struct thread *thread, struct thread_apc *apc )
|
|
{
|
|
struct list *queue;
|
|
|
|
if (!thread) /* find a suitable thread inside the process */
|
|
{
|
|
struct thread *candidate;
|
|
|
|
/* first try to find a waiting thread */
|
|
LIST_FOR_EACH_ENTRY( candidate, &process->thread_list, struct thread, proc_entry )
|
|
{
|
|
if (candidate->state == TERMINATED) continue;
|
|
if (is_in_apc_wait( candidate ))
|
|
{
|
|
thread = candidate;
|
|
break;
|
|
}
|
|
}
|
|
if (!thread)
|
|
{
|
|
/* then use the first one that accepts a signal */
|
|
LIST_FOR_EACH_ENTRY( candidate, &process->thread_list, struct thread, proc_entry )
|
|
{
|
|
if (send_thread_signal( candidate, SIGUSR1 ))
|
|
{
|
|
thread = candidate;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!thread) return 0; /* nothing found */
|
|
queue = get_apc_queue( thread, apc->call.type );
|
|
}
|
|
else
|
|
{
|
|
if (thread->state == TERMINATED) return 0;
|
|
queue = get_apc_queue( thread, apc->call.type );
|
|
/* send signal for system APCs if needed */
|
|
if (queue == &thread->system_apc && list_empty( queue ) && !is_in_apc_wait( thread ))
|
|
{
|
|
if (!send_thread_signal( thread, SIGUSR1 )) return 0;
|
|
}
|
|
/* cancel a possible previous APC with the same owner */
|
|
if (apc->owner) thread_cancel_apc( thread, apc->owner, apc->call.type );
|
|
}
|
|
|
|
grab_object( apc );
|
|
list_add_tail( queue, &apc->entry );
|
|
if (!list_prev( queue, &apc->entry )) /* first one */
|
|
wake_thread( thread );
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* queue an async procedure call */
|
|
int thread_queue_apc( struct thread *thread, struct object *owner, const apc_call_t *call_data )
|
|
{
|
|
struct thread_apc *apc;
|
|
int ret = 0;
|
|
|
|
if ((apc = create_apc( owner, call_data )))
|
|
{
|
|
ret = queue_apc( NULL, thread, apc );
|
|
release_object( apc );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* cancel the async procedure call owned by a specific object */
|
|
void thread_cancel_apc( struct thread *thread, struct object *owner, enum apc_type type )
|
|
{
|
|
struct thread_apc *apc;
|
|
struct list *queue = get_apc_queue( thread, type );
|
|
|
|
LIST_FOR_EACH_ENTRY( apc, queue, struct thread_apc, entry )
|
|
{
|
|
if (apc->owner != owner) continue;
|
|
list_remove( &apc->entry );
|
|
apc->executed = 1;
|
|
wake_up( &apc->obj, 0 );
|
|
release_object( apc );
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* remove the head apc from the queue; the returned object must be released 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;
|
|
}
|
|
|
|
/* clear an APC queue, cancelling all the APCs on it */
|
|
static void clear_apc_queue( struct list *queue )
|
|
{
|
|
struct list *ptr;
|
|
|
|
while ((ptr = list_head( queue )))
|
|
{
|
|
struct thread_apc *apc = LIST_ENTRY( ptr, struct thread_apc, entry );
|
|
list_remove( &apc->entry );
|
|
apc->executed = 1;
|
|
wake_up( &apc->obj, 0 );
|
|
release_object( 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;
|
|
}
|
|
|
|
/* 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 = current_time;
|
|
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, 0, thread->exit_code );
|
|
/* if it is waiting on the socket, we don't need to send a SIGQUIT */
|
|
violent_death = 0;
|
|
}
|
|
kill_console_processes( thread, 0 );
|
|
debug_exit_thread( thread );
|
|
abandon_mutexes( thread );
|
|
wake_up( &thread->obj, 0 );
|
|
if (violent_death) send_thread_signal( thread, SIGQUIT );
|
|
cleanup_thread( thread );
|
|
remove_process_thread( thread->process, thread );
|
|
release_object( thread );
|
|
}
|
|
|
|
/* copy parts of a context structure */
|
|
static void copy_context( context_t *to, const context_t *from, unsigned int flags )
|
|
{
|
|
assert( to->cpu == from->cpu );
|
|
to->flags |= flags;
|
|
if (flags & SERVER_CTX_CONTROL) to->ctl = from->ctl;
|
|
if (flags & SERVER_CTX_INTEGER) to->integer = from->integer;
|
|
if (flags & SERVER_CTX_SEGMENTS) to->seg = from->seg;
|
|
if (flags & SERVER_CTX_FLOATING_POINT) to->fp = from->fp;
|
|
if (flags & SERVER_CTX_DEBUG_REGISTERS) to->debug = from->debug;
|
|
if (flags & SERVER_CTX_EXTENDED_REGISTERS) to->ext = from->ext;
|
|
}
|
|
|
|
/* return the context flags that correspond to system regs */
|
|
/* (system regs are the ones we can't access on the client side) */
|
|
static unsigned int get_context_system_regs( enum cpu_type cpu )
|
|
{
|
|
switch (cpu)
|
|
{
|
|
case CPU_x86: return SERVER_CTX_DEBUG_REGISTERS;
|
|
case CPU_x86_64: return SERVER_CTX_DEBUG_REGISTERS;
|
|
case CPU_POWERPC: return 0;
|
|
case CPU_ARM: return 0;
|
|
case CPU_ARM64: return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* trigger a breakpoint event in a given thread */
|
|
void break_thread( struct thread *thread )
|
|
{
|
|
debug_event_t data;
|
|
|
|
assert( thread->context );
|
|
|
|
memset( &data, 0, sizeof(data) );
|
|
data.exception.first = 1;
|
|
data.exception.exc_code = STATUS_BREAKPOINT;
|
|
data.exception.flags = EXCEPTION_CONTINUABLE;
|
|
switch (thread->context->cpu)
|
|
{
|
|
case CPU_x86:
|
|
data.exception.address = thread->context->ctl.i386_regs.eip;
|
|
break;
|
|
case CPU_x86_64:
|
|
data.exception.address = thread->context->ctl.x86_64_regs.rip;
|
|
break;
|
|
case CPU_POWERPC:
|
|
data.exception.address = thread->context->ctl.powerpc_regs.iar;
|
|
break;
|
|
case CPU_ARM:
|
|
data.exception.address = thread->context->ctl.arm_regs.pc;
|
|
break;
|
|
case CPU_ARM64:
|
|
data.exception.address = thread->context->ctl.arm64_regs.pc;
|
|
break;
|
|
}
|
|
generate_debug_event( thread, EXCEPTION_DEBUG_EVENT, &data );
|
|
thread->debug_break = 0;
|
|
}
|
|
|
|
/* 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, req->access, req->attributes )))
|
|
{
|
|
/* thread object will be released when the thread gets killed */
|
|
return;
|
|
}
|
|
kill_thread( thread, 1 );
|
|
}
|
|
}
|
|
|
|
/* initialize a new thread */
|
|
DECL_HANDLER(init_thread)
|
|
{
|
|
unsigned int prefix_cpu_mask = get_prefix_cpu_mask();
|
|
struct process *process = current->process;
|
|
int wait_fd, reply_fd;
|
|
|
|
if ((reply_fd = thread_get_inflight_fd( current, req->reply_fd )) == -1)
|
|
{
|
|
set_error( STATUS_TOO_MANY_OPENED_FILES );
|
|
return;
|
|
}
|
|
if ((wait_fd = thread_get_inflight_fd( current, req->wait_fd )) == -1)
|
|
{
|
|
set_error( STATUS_TOO_MANY_OPENED_FILES );
|
|
goto error;
|
|
}
|
|
|
|
if (current->reply_fd) /* already initialised */
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
goto error;
|
|
}
|
|
|
|
if (fcntl( reply_fd, F_SETFL, O_NONBLOCK ) == -1) goto error;
|
|
|
|
current->reply_fd = create_anonymous_fd( &thread_fd_ops, reply_fd, ¤t->obj, 0 );
|
|
current->wait_fd = create_anonymous_fd( &thread_fd_ops, wait_fd, ¤t->obj, 0 );
|
|
if (!current->reply_fd || !current->wait_fd) return;
|
|
|
|
if (!is_valid_address(req->teb))
|
|
{
|
|
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 */
|
|
{
|
|
if (!CPU_FLAG(req->cpu) || !(supported_cpus & prefix_cpu_mask & CPU_FLAG(req->cpu)))
|
|
{
|
|
if (!(supported_cpus & CPU_64BIT_MASK))
|
|
set_error( STATUS_NOT_SUPPORTED );
|
|
else
|
|
set_error( STATUS_NOT_REGISTRY_FILE ); /* server supports it but not the prefix */
|
|
return;
|
|
}
|
|
process->unix_pid = current->unix_pid;
|
|
process->peb = req->entry;
|
|
process->cpu = req->cpu;
|
|
reply->info_size = init_process( current );
|
|
if (!process->parent)
|
|
process->affinity = current->affinity = get_thread_affinity( current );
|
|
else
|
|
set_thread_affinity( current, current->affinity );
|
|
}
|
|
else
|
|
{
|
|
if (req->cpu != process->cpu)
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return;
|
|
}
|
|
if (process->unix_pid != current->unix_pid)
|
|
process->unix_pid = -1; /* can happen with linuxthreads */
|
|
stop_thread_if_suspended( current );
|
|
generate_debug_event( current, CREATE_THREAD_DEBUG_EVENT, &req->entry );
|
|
set_thread_affinity( current, current->affinity );
|
|
}
|
|
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;
|
|
reply->all_cpus = supported_cpus & prefix_cpu_mask;
|
|
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->attributes );
|
|
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 : STATUS_PENDING;
|
|
reply->priority = thread->priority;
|
|
reply->affinity = thread->affinity;
|
|
reply->creation_time = thread->creation_time;
|
|
reply->exit_time = thread->exit_time;
|
|
reply->last = thread->process->running_threads == 1;
|
|
|
|
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 )))
|
|
{
|
|
reply->count = resume_thread( thread );
|
|
release_object( thread );
|
|
}
|
|
}
|
|
|
|
/* select on a handle list */
|
|
DECL_HANDLER(select)
|
|
{
|
|
struct thread_apc *apc;
|
|
unsigned int count;
|
|
const apc_result_t *result = get_req_data();
|
|
const obj_handle_t *handles = (const obj_handle_t *)(result + 1);
|
|
|
|
if (get_req_data_size() < sizeof(*result))
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return;
|
|
}
|
|
count = (get_req_data_size() - sizeof(*result)) / sizeof(obj_handle_t);
|
|
|
|
/* first store results of previous apc */
|
|
if (req->prev_apc)
|
|
{
|
|
if (!(apc = (struct thread_apc *)get_handle_obj( current->process, req->prev_apc,
|
|
0, &thread_apc_ops ))) return;
|
|
apc->result = *result;
|
|
apc->executed = 1;
|
|
if (apc->result.type == APC_CREATE_THREAD) /* transfer the handle to the caller process */
|
|
{
|
|
obj_handle_t handle = duplicate_handle( current->process, apc->result.create_thread.handle,
|
|
apc->caller->process, 0, 0, DUP_HANDLE_SAME_ACCESS );
|
|
close_handle( current->process, apc->result.create_thread.handle );
|
|
apc->result.create_thread.handle = handle;
|
|
clear_error(); /* ignore errors from the above calls */
|
|
}
|
|
else if (apc->result.type == APC_ASYNC_IO)
|
|
{
|
|
if (apc->owner)
|
|
async_set_result( apc->owner, apc->result.async_io.status,
|
|
apc->result.async_io.total, apc->result.async_io.apc );
|
|
}
|
|
wake_up( &apc->obj, 0 );
|
|
close_handle( current->process, req->prev_apc );
|
|
release_object( apc );
|
|
}
|
|
|
|
reply->timeout = select_on( count, req->cookie, handles, req->flags, req->timeout, req->signal );
|
|
|
|
if (get_error() == STATUS_USER_APC)
|
|
{
|
|
for (;;)
|
|
{
|
|
if (!(apc = thread_dequeue_apc( current, !(req->flags & SELECT_ALERTABLE) )))
|
|
break;
|
|
/* Optimization: ignore APC_NONE calls, they are only used to
|
|
* wake up a thread, but since we got here the thread woke up already.
|
|
*/
|
|
if (apc->call.type != APC_NONE)
|
|
{
|
|
if ((reply->apc_handle = alloc_handle( current->process, apc, SYNCHRONIZE, 0 )))
|
|
reply->call = apc->call;
|
|
release_object( apc );
|
|
break;
|
|
}
|
|
apc->executed = 1;
|
|
wake_up( &apc->obj, 0 );
|
|
release_object( apc );
|
|
}
|
|
}
|
|
}
|
|
|
|
/* queue an APC for a thread or process */
|
|
DECL_HANDLER(queue_apc)
|
|
{
|
|
struct thread *thread = NULL;
|
|
struct process *process = NULL;
|
|
struct thread_apc *apc;
|
|
|
|
if (!(apc = create_apc( NULL, &req->call ))) return;
|
|
|
|
switch (apc->call.type)
|
|
{
|
|
case APC_NONE:
|
|
case APC_USER:
|
|
thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT );
|
|
break;
|
|
case APC_VIRTUAL_ALLOC:
|
|
case APC_VIRTUAL_FREE:
|
|
case APC_VIRTUAL_PROTECT:
|
|
case APC_VIRTUAL_FLUSH:
|
|
case APC_VIRTUAL_LOCK:
|
|
case APC_VIRTUAL_UNLOCK:
|
|
case APC_UNMAP_VIEW:
|
|
process = get_process_from_handle( req->handle, PROCESS_VM_OPERATION );
|
|
break;
|
|
case APC_VIRTUAL_QUERY:
|
|
process = get_process_from_handle( req->handle, PROCESS_QUERY_INFORMATION );
|
|
break;
|
|
case APC_MAP_VIEW:
|
|
process = get_process_from_handle( req->handle, PROCESS_VM_OPERATION );
|
|
if (process && process != current->process)
|
|
{
|
|
/* duplicate the handle into the target process */
|
|
obj_handle_t handle = duplicate_handle( current->process, apc->call.map_view.handle,
|
|
process, 0, 0, DUP_HANDLE_SAME_ACCESS );
|
|
if (handle) apc->call.map_view.handle = handle;
|
|
else
|
|
{
|
|
release_object( process );
|
|
process = NULL;
|
|
}
|
|
}
|
|
break;
|
|
case APC_CREATE_THREAD:
|
|
process = get_process_from_handle( req->handle, PROCESS_CREATE_THREAD );
|
|
break;
|
|
default:
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
break;
|
|
}
|
|
|
|
if (thread)
|
|
{
|
|
if (!queue_apc( NULL, thread, apc )) set_error( STATUS_THREAD_IS_TERMINATING );
|
|
release_object( thread );
|
|
}
|
|
else if (process)
|
|
{
|
|
reply->self = (process == current->process);
|
|
if (!reply->self)
|
|
{
|
|
obj_handle_t handle = alloc_handle( current->process, apc, SYNCHRONIZE, 0 );
|
|
if (handle)
|
|
{
|
|
if (queue_apc( process, NULL, apc ))
|
|
{
|
|
apc->caller = (struct thread *)grab_object( current );
|
|
reply->handle = handle;
|
|
}
|
|
else
|
|
{
|
|
close_handle( current->process, handle );
|
|
set_error( STATUS_PROCESS_IS_TERMINATING );
|
|
}
|
|
}
|
|
}
|
|
release_object( process );
|
|
}
|
|
|
|
release_object( apc );
|
|
}
|
|
|
|
/* Get the result of an APC call */
|
|
DECL_HANDLER(get_apc_result)
|
|
{
|
|
struct thread_apc *apc;
|
|
|
|
if (!(apc = (struct thread_apc *)get_handle_obj( current->process, req->handle,
|
|
0, &thread_apc_ops ))) return;
|
|
if (!apc->executed) set_error( STATUS_PENDING );
|
|
else
|
|
{
|
|
reply->result = apc->result;
|
|
/* close the handle directly to avoid an extra round-trip */
|
|
close_handle( current->process, req->handle );
|
|
}
|
|
release_object( apc );
|
|
}
|
|
|
|
/* retrieve the current context of a thread */
|
|
DECL_HANDLER(get_thread_context)
|
|
{
|
|
struct thread *thread;
|
|
context_t *context;
|
|
|
|
if (get_reply_max_size() < sizeof(context_t))
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return;
|
|
}
|
|
if (!(thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT ))) return;
|
|
reply->self = (thread == current);
|
|
|
|
if (thread != current && !thread->context)
|
|
{
|
|
/* thread is not suspended, retry (if it's still running) */
|
|
if (thread->state == RUNNING)
|
|
{
|
|
set_error( STATUS_PENDING );
|
|
if (req->suspend)
|
|
{
|
|
release_object( thread );
|
|
/* make sure we have suspend access */
|
|
if (!(thread = get_thread_from_handle( req->handle, THREAD_SUSPEND_RESUME ))) return;
|
|
suspend_thread( thread );
|
|
}
|
|
}
|
|
else set_error( STATUS_UNSUCCESSFUL );
|
|
}
|
|
else if ((context = set_reply_data_size( sizeof(context_t) )))
|
|
{
|
|
unsigned int flags = get_context_system_regs( thread->process->cpu );
|
|
|
|
memset( context, 0, sizeof(context_t) );
|
|
context->cpu = thread->process->cpu;
|
|
if (thread->context) copy_context( context, thread->context, req->flags & ~flags );
|
|
if (flags) get_thread_context( thread, context, flags );
|
|
}
|
|
release_object( thread );
|
|
}
|
|
|
|
/* set the current context of a thread */
|
|
DECL_HANDLER(set_thread_context)
|
|
{
|
|
struct thread *thread;
|
|
const context_t *context = get_req_data();
|
|
|
|
if (get_req_data_size() < sizeof(context_t))
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return;
|
|
}
|
|
if (!(thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT ))) return;
|
|
reply->self = (thread == current);
|
|
|
|
if (thread != current && !thread->context)
|
|
{
|
|
/* thread is not suspended, retry (if it's still running) */
|
|
if (thread->state == RUNNING)
|
|
{
|
|
set_error( STATUS_PENDING );
|
|
if (req->suspend)
|
|
{
|
|
release_object( thread );
|
|
/* make sure we have suspend access */
|
|
if (!(thread = get_thread_from_handle( req->handle, THREAD_SUSPEND_RESUME ))) return;
|
|
suspend_thread( thread );
|
|
}
|
|
}
|
|
else set_error( STATUS_UNSUCCESSFUL );
|
|
}
|
|
else if (context->cpu == thread->process->cpu)
|
|
{
|
|
unsigned int system_flags = get_context_system_regs(context->cpu) & context->flags;
|
|
unsigned int client_flags = context->flags & ~system_flags;
|
|
|
|
if (system_flags) set_thread_context( thread, context, system_flags );
|
|
if (thread->context && !get_error()) copy_context( thread->context, context, client_flags );
|
|
}
|
|
else set_error( STATUS_INVALID_PARAMETER );
|
|
|
|
release_object( thread );
|
|
}
|
|
|
|
/* retrieve the suspended context of a thread */
|
|
DECL_HANDLER(get_suspend_context)
|
|
{
|
|
if (get_reply_max_size() < sizeof(context_t))
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return;
|
|
}
|
|
|
|
if (current->suspend_context)
|
|
{
|
|
set_reply_data_ptr( current->suspend_context, sizeof(context_t) );
|
|
if (current->context == current->suspend_context)
|
|
{
|
|
current->context = NULL;
|
|
stop_thread_if_suspended( current );
|
|
}
|
|
current->suspend_context = NULL;
|
|
}
|
|
else set_error( STATUS_INVALID_PARAMETER ); /* not suspended, shouldn't happen */
|
|
}
|
|
|
|
/* store the suspended context of a thread */
|
|
DECL_HANDLER(set_suspend_context)
|
|
{
|
|
const context_t *context = get_req_data();
|
|
|
|
if (get_req_data_size() < sizeof(context_t))
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return;
|
|
}
|
|
|
|
if (current->context || context->cpu != current->process->cpu)
|
|
{
|
|
/* nested suspend or exception, shouldn't happen */
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
}
|
|
else if ((current->suspend_context = mem_alloc( sizeof(context_t) )))
|
|
{
|
|
memcpy( current->suspend_context, get_req_data(), sizeof(context_t) );
|
|
current->context = current->suspend_context;
|
|
if (current->debug_break) break_thread( current );
|
|
}
|
|
}
|
|
|
|
/* 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 );
|
|
}
|
|
}
|