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Sweden-Number/server/process.c

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/*
* Server-side process management
*
* Copyright (C) 1998 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <limits.h>
#include <signal.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#include <unistd.h>
#ifdef HAVE_POLL_H
#include <poll.h>
#endif
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "winternl.h"
#include "file.h"
#include "handle.h"
#include "process.h"
#include "thread.h"
#include "request.h"
#include "user.h"
#include "security.h"
/* process structure */
static struct list process_list = LIST_INIT(process_list);
static int running_processes, user_processes;
static struct event *shutdown_event; /* signaled when shutdown starts */
static struct timeout_user *shutdown_timeout; /* timeout for server shutdown */
static int shutdown_stage; /* current stage in the shutdown process */
/* process operations */
static void process_dump( struct object *obj, int verbose );
static int process_signaled( struct object *obj, struct wait_queue_entry *entry );
static unsigned int process_map_access( struct object *obj, unsigned int access );
static void process_poll_event( struct fd *fd, int event );
static void process_destroy( struct object *obj );
static void terminate_process( struct process *process, struct thread *skip, int exit_code );
static const struct object_ops process_ops =
{
sizeof(struct process), /* size */
process_dump, /* dump */
no_get_type, /* get_type */
add_queue, /* add_queue */
remove_queue, /* remove_queue */
process_signaled, /* signaled */
no_satisfied, /* satisfied */
no_signal, /* signal */
no_get_fd, /* get_fd */
process_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
no_link_name, /* link_name */
NULL, /* unlink_name */
no_open_file, /* open_file */
no_close_handle, /* close_handle */
process_destroy /* destroy */
};
static const struct fd_ops process_fd_ops =
{
NULL, /* get_poll_events */
process_poll_event, /* poll_event */
NULL, /* flush */
NULL, /* get_fd_type */
NULL, /* ioctl */
NULL, /* queue_async */
NULL, /* reselect_async */
NULL /* cancel async */
};
/* process startup info */
struct startup_info
{
struct object obj; /* object header */
struct file *exe_file; /* file handle for main exe */
struct process *process; /* created process */
data_size_t info_size; /* size of startup info */
data_size_t data_size; /* size of whole startup data */
startup_info_t *data; /* data for startup info */
};
static void startup_info_dump( struct object *obj, int verbose );
static int startup_info_signaled( struct object *obj, struct wait_queue_entry *entry );
static void startup_info_destroy( struct object *obj );
static const struct object_ops startup_info_ops =
{
sizeof(struct startup_info), /* size */
startup_info_dump, /* dump */
no_get_type, /* get_type */
add_queue, /* add_queue */
remove_queue, /* remove_queue */
startup_info_signaled, /* signaled */
no_satisfied, /* satisfied */
no_signal, /* signal */
no_get_fd, /* get_fd */
no_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
no_link_name, /* link_name */
NULL, /* unlink_name */
no_open_file, /* open_file */
no_close_handle, /* close_handle */
startup_info_destroy /* destroy */
};
/* job object */
static void job_dump( struct object *obj, int verbose );
static struct object_type *job_get_type( struct object *obj );
static int job_signaled( struct object *obj, struct wait_queue_entry *entry );
static unsigned int job_map_access( struct object *obj, unsigned int access );
static int job_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
static void job_destroy( struct object *obj );
struct job
{
struct object obj; /* object header */
struct list process_list; /* list of all processes */
int num_processes; /* count of running processes */
unsigned int limit_flags; /* limit flags */
int terminating; /* job is terminating */
int signaled; /* job is signaled */
struct completion *completion_port; /* associated completion port */
apc_param_t completion_key; /* key to send with completion messages */
};
static const struct object_ops job_ops =
{
sizeof(struct job), /* size */
job_dump, /* dump */
job_get_type, /* get_type */
add_queue, /* add_queue */
remove_queue, /* remove_queue */
job_signaled, /* signaled */
no_satisfied, /* satisfied */
no_signal, /* signal */
no_get_fd, /* get_fd */
job_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
directory_link_name, /* link_name */
default_unlink_name, /* unlink_name */
no_open_file, /* open_file */
job_close_handle, /* close_handle */
job_destroy /* destroy */
};
static struct job *create_job_object( struct directory *root, const struct unicode_str *name,
unsigned int attr, const struct security_descriptor *sd )
{
struct job *job;
if ((job = create_named_object_dir( root, name, attr, &job_ops )))
{
if (get_error() != STATUS_OBJECT_NAME_EXISTS)
{
/* initialize it if it didn't already exist */
if (sd) default_set_sd( &job->obj, sd, OWNER_SECURITY_INFORMATION |
GROUP_SECURITY_INFORMATION |
DACL_SECURITY_INFORMATION |
SACL_SECURITY_INFORMATION );
list_init( &job->process_list );
job->num_processes = 0;
job->limit_flags = 0;
job->terminating = 0;
job->signaled = 0;
job->completion_port = NULL;
job->completion_key = 0;
}
}
return job;
}
static struct job *get_job_obj( struct process *process, obj_handle_t handle, unsigned int access )
{
return (struct job *)get_handle_obj( process, handle, access, &job_ops );
}
static struct object_type *job_get_type( struct object *obj )
{
static const WCHAR name[] = {'J','o','b'};
static const struct unicode_str str = { name, sizeof(name) };
return get_object_type( &str );
};
static unsigned int job_map_access( struct object *obj, unsigned int access )
{
if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ;
if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE;
if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
if (access & GENERIC_ALL) access |= JOB_OBJECT_ALL_ACCESS;
return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
}
static void add_job_completion( struct job *job, apc_param_t msg, apc_param_t pid )
{
if (job->completion_port)
add_completion( job->completion_port, job->completion_key, pid, STATUS_SUCCESS, msg );
}
static void add_job_process( struct job *job, struct process *process )
{
if (!process->running_threads)
{
set_error( STATUS_PROCESS_IS_TERMINATING );
return;
}
if (process->job)
{
set_error( STATUS_ACCESS_DENIED );
return;
}
process->job = (struct job *)grab_object( job );
list_add_tail( &job->process_list, &process->job_entry );
job->num_processes++;
add_job_completion( job, JOB_OBJECT_MSG_NEW_PROCESS, get_process_id(process) );
}
/* called when a process has terminated, allow one additional process */
static void release_job_process( struct process *process )
{
struct job *job = process->job;
if (!job) return;
assert( job->num_processes );
job->num_processes--;
if (!job->terminating)
add_job_completion( job, JOB_OBJECT_MSG_EXIT_PROCESS, get_process_id(process) );
if (!job->num_processes)
add_job_completion( job, JOB_OBJECT_MSG_ACTIVE_PROCESS_ZERO, 0 );
}
static void terminate_job( struct job *job, int exit_code )
{
/* don't report completion events for terminated processes */
job->terminating = 1;
for (;;) /* restart from the beginning of the list every time */
{
struct process *process;
/* find the first process associated with this job and still running */
LIST_FOR_EACH_ENTRY( process, &job->process_list, struct process, job_entry )
{
if (process->running_threads) break;
}
if (&process->job_entry == &job->process_list) break; /* no process found */
assert( process->job == job );
terminate_process( process, NULL, exit_code );
}
job->terminating = 0;
job->signaled = 1;
wake_up( &job->obj, 0 );
}
static int job_close_handle( struct object *obj, struct process *process, obj_handle_t handle )
{
struct job *job = (struct job *)obj;
assert( obj->ops == &job_ops );
if (obj->handle_count == 1) /* last handle */
{
if (job->limit_flags & JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE)
terminate_job( job, 0 );
}
return 1;
}
static void job_destroy( struct object *obj )
{
struct job *job = (struct job *)obj;
assert( obj->ops == &job_ops );
assert( !job->num_processes );
assert( list_empty(&job->process_list) );
if (job->completion_port) release_object( job->completion_port );
}
static void job_dump( struct object *obj, int verbose )
{
struct job *job = (struct job *)obj;
assert( obj->ops == &job_ops );
fprintf( stderr, "Job processes=%d\n", list_count(&job->process_list) );
}
static int job_signaled( struct object *obj, struct wait_queue_entry *entry )
{
struct job *job = (struct job *)obj;
return job->signaled;
}
struct ptid_entry
{
void *ptr; /* entry ptr */
unsigned int next; /* next free entry */
};
static struct ptid_entry *ptid_entries; /* array of ptid entries */
static unsigned int used_ptid_entries; /* number of entries in use */
static unsigned int alloc_ptid_entries; /* number of allocated entries */
static unsigned int next_free_ptid; /* next free entry */
static unsigned int last_free_ptid; /* last free entry */
static void kill_all_processes(void);
#define PTID_OFFSET 8 /* offset for first ptid value */
/* allocate a new process or thread id */
unsigned int alloc_ptid( void *ptr )
{
struct ptid_entry *entry;
unsigned int id;
if (used_ptid_entries < alloc_ptid_entries)
{
id = used_ptid_entries + PTID_OFFSET;
entry = &ptid_entries[used_ptid_entries++];
}
else if (next_free_ptid)
{
id = next_free_ptid;
entry = &ptid_entries[id - PTID_OFFSET];
if (!(next_free_ptid = entry->next)) last_free_ptid = 0;
}
else /* need to grow the array */
{
unsigned int count = alloc_ptid_entries + (alloc_ptid_entries / 2);
if (!count) count = 64;
if (!(entry = realloc( ptid_entries, count * sizeof(*entry) )))
{
set_error( STATUS_NO_MEMORY );
return 0;
}
ptid_entries = entry;
alloc_ptid_entries = count;
id = used_ptid_entries + PTID_OFFSET;
entry = &ptid_entries[used_ptid_entries++];
}
entry->ptr = ptr;
return id;
}
/* free a process or thread id */
void free_ptid( unsigned int id )
{
struct ptid_entry *entry = &ptid_entries[id - PTID_OFFSET];
entry->ptr = NULL;
entry->next = 0;
/* append to end of free list so that we don't reuse it too early */
if (last_free_ptid) ptid_entries[last_free_ptid - PTID_OFFSET].next = id;
else next_free_ptid = id;
last_free_ptid = id;
}
/* retrieve the pointer corresponding to a process or thread id */
void *get_ptid_entry( unsigned int id )
{
if (id < PTID_OFFSET) return NULL;
if (id - PTID_OFFSET >= used_ptid_entries) return NULL;
return ptid_entries[id - PTID_OFFSET].ptr;
}
/* return the main thread of the process */
struct thread *get_process_first_thread( struct process *process )
{
struct list *ptr = list_head( &process->thread_list );
if (!ptr) return NULL;
return LIST_ENTRY( ptr, struct thread, proc_entry );
}
/* set the state of the process startup info */
static void set_process_startup_state( struct process *process, enum startup_state state )
{
if (process->startup_state == STARTUP_IN_PROGRESS) process->startup_state = state;
if (process->startup_info)
{
wake_up( &process->startup_info->obj, 0 );
release_object( process->startup_info );
process->startup_info = NULL;
}
}
/* callback for server shutdown */
static void server_shutdown_timeout( void *arg )
{
shutdown_timeout = NULL;
if (!running_processes)
{
close_master_socket( 0 );
return;
}
switch(++shutdown_stage)
{
case 1: /* signal system processes to exit */
if (debug_level) fprintf( stderr, "wineserver: shutting down\n" );
if (shutdown_event) set_event( shutdown_event );
shutdown_timeout = add_timeout_user( 2 * -TICKS_PER_SEC, server_shutdown_timeout, NULL );
close_master_socket( 4 * -TICKS_PER_SEC );
break;
case 2: /* now forcibly kill all processes (but still wait for SIGKILL timeouts) */
kill_all_processes();
break;
}
}
/* forced shutdown, used for wineserver -k */
void shutdown_master_socket(void)
{
kill_all_processes();
shutdown_stage = 2;
if (shutdown_timeout)
{
remove_timeout_user( shutdown_timeout );
shutdown_timeout = NULL;
}
close_master_socket( 2 * -TICKS_PER_SEC ); /* for SIGKILL timeouts */
}
/* final cleanup once we are sure a process is really dead */
static void process_died( struct process *process )
{
if (debug_level) fprintf( stderr, "%04x: *process killed*\n", process->id );
if (!process->is_system)
{
if (!--user_processes && !shutdown_stage && master_socket_timeout != TIMEOUT_INFINITE)
shutdown_timeout = add_timeout_user( master_socket_timeout, server_shutdown_timeout, NULL );
}
release_object( process );
if (!--running_processes && shutdown_stage) close_master_socket( 0 );
}
/* callback for process sigkill timeout */
static void process_sigkill( void *private )
{
struct process *process = private;
process->sigkill_timeout = NULL;
kill( process->unix_pid, SIGKILL );
process_died( process );
}
/* start the sigkill timer for a process upon exit */
static void start_sigkill_timer( struct process *process )
{
grab_object( process );
if (process->unix_pid != -1 && process->msg_fd)
process->sigkill_timeout = add_timeout_user( -TICKS_PER_SEC, process_sigkill, process );
else
process_died( process );
}
/* create a new process and its main thread */
/* if the function fails the fd is closed */
struct thread *create_process( int fd, struct thread *parent_thread, int inherit_all )
{
struct process *process;
struct thread *thread = NULL;
int request_pipe[2];
if (!(process = alloc_object( &process_ops )))
{
close( fd );
goto error;
}
process->parent = NULL;
process->debugger = NULL;
process->handles = NULL;
process->msg_fd = NULL;
process->sigkill_timeout = NULL;
process->unix_pid = -1;
process->exit_code = STILL_ACTIVE;
process->running_threads = 0;
process->priority = PROCESS_PRIOCLASS_NORMAL;
process->suspend = 0;
process->is_system = 0;
process->debug_children = 1;
process->is_terminating = 0;
process->job = NULL;
process->console = NULL;
process->startup_state = STARTUP_IN_PROGRESS;
process->startup_info = NULL;
process->idle_event = NULL;
process->peb = 0;
process->ldt_copy = 0;
process->winstation = 0;
process->desktop = 0;
process->token = NULL;
process->trace_data = 0;
process->rawinput_mouse = NULL;
process->rawinput_kbd = NULL;
list_init( &process->thread_list );
list_init( &process->locks );
list_init( &process->classes );
list_init( &process->dlls );
list_init( &process->rawinput_devices );
process->end_time = 0;
list_add_tail( &process_list, &process->entry );
if (!(process->id = process->group_id = alloc_ptid( process )))
{
close( fd );
goto error;
}
if (!(process->msg_fd = create_anonymous_fd( &process_fd_ops, fd, &process->obj, 0 ))) goto error;
/* create the handle table */
if (!parent_thread)
{
process->handles = alloc_handle_table( process, 0 );
process->token = token_create_admin();
process->affinity = ~0;
}
else
{
struct process *parent = parent_thread->process;
process->parent = (struct process *)grab_object( parent );
process->handles = inherit_all ? copy_handle_table( process, parent )
: alloc_handle_table( process, 0 );
/* Note: for security reasons, starting a new process does not attempt
* to use the current impersonation token for the new process */
process->token = token_duplicate( parent->token, TRUE, 0 );
process->affinity = parent->affinity;
}
if (!process->handles || !process->token) goto error;
/* create the main thread */
if (pipe( request_pipe ) == -1)
{
file_set_error();
goto error;
}
if (send_client_fd( process, request_pipe[1], SERVER_PROTOCOL_VERSION ) == -1)
{
close( request_pipe[0] );
close( request_pipe[1] );
goto error;
}
close( request_pipe[1] );
if (!(thread = create_thread( request_pipe[0], process ))) goto error;
set_fd_events( process->msg_fd, POLLIN ); /* start listening to events */
release_object( process );
return thread;
error:
if (process) release_object( process );
/* if we failed to start our first process, close everything down */
if (!running_processes) close_master_socket( 0 );
return NULL;
}
/* initialize the current process and fill in the request */
data_size_t init_process( struct thread *thread )
{
struct process *process = thread->process;
struct startup_info *info = process->startup_info;
init_process_tracing( process );
if (!info) return 0;
return info->data_size;
}
/* destroy a process when its refcount is 0 */
static void process_destroy( struct object *obj )
{
struct process *process = (struct process *)obj;
assert( obj->ops == &process_ops );
/* we can't have a thread remaining */
assert( list_empty( &process->thread_list ));
assert( !process->sigkill_timeout ); /* timeout should hold a reference to the process */
close_process_handles( process );
set_process_startup_state( process, STARTUP_ABORTED );
if (process->job)
{
list_remove( &process->job_entry );
release_object( process->job );
}
if (process->console) release_object( process->console );
if (process->parent) release_object( process->parent );
if (process->msg_fd) release_object( process->msg_fd );
list_remove( &process->entry );
if (process->idle_event) release_object( process->idle_event );
if (process->id) free_ptid( process->id );
if (process->token) release_object( process->token );
}
/* dump a process on stdout for debugging purposes */
static void process_dump( struct object *obj, int verbose )
{
struct process *process = (struct process *)obj;
assert( obj->ops == &process_ops );
fprintf( stderr, "Process id=%04x handles=%p\n", process->id, process->handles );
}
static int process_signaled( struct object *obj, struct wait_queue_entry *entry )
{
struct process *process = (struct process *)obj;
return !process->running_threads;
}
static unsigned int process_map_access( struct object *obj, unsigned int access )
{
if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ | PROCESS_QUERY_INFORMATION | PROCESS_VM_READ;
if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE | PROCESS_SET_QUOTA | PROCESS_SET_INFORMATION | PROCESS_SUSPEND_RESUME |
PROCESS_VM_WRITE | PROCESS_DUP_HANDLE | PROCESS_CREATE_PROCESS | PROCESS_CREATE_THREAD | PROCESS_VM_OPERATION;
if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE | SYNCHRONIZE | PROCESS_QUERY_LIMITED_INFORMATION | PROCESS_TERMINATE;
if (access & GENERIC_ALL) access |= PROCESS_ALL_ACCESS;
if (access & PROCESS_QUERY_INFORMATION) access |= PROCESS_QUERY_LIMITED_INFORMATION;
if (access & PROCESS_SET_INFORMATION) access |= PROCESS_SET_LIMITED_INFORMATION;
return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
}
static void process_poll_event( struct fd *fd, int event )
{
struct process *process = get_fd_user( fd );
assert( process->obj.ops == &process_ops );
if (event & (POLLERR | POLLHUP)) kill_process( process, 0 );
else if (event & POLLIN) receive_fd( process );
}
static void startup_info_destroy( struct object *obj )
{
struct startup_info *info = (struct startup_info *)obj;
assert( obj->ops == &startup_info_ops );
free( info->data );
if (info->exe_file) release_object( info->exe_file );
if (info->process) release_object( info->process );
}
static void startup_info_dump( struct object *obj, int verbose )
{
struct startup_info *info = (struct startup_info *)obj;
assert( obj->ops == &startup_info_ops );
fprintf( stderr, "Startup info in=%04x out=%04x err=%04x\n",
info->data->hstdin, info->data->hstdout, info->data->hstderr );
}
static int startup_info_signaled( struct object *obj, struct wait_queue_entry *entry )
{
struct startup_info *info = (struct startup_info *)obj;
return info->process && info->process->startup_state != STARTUP_IN_PROGRESS;
}
/* get a process from an id (and increment the refcount) */
struct process *get_process_from_id( process_id_t id )
{
struct object *obj = get_ptid_entry( id );
if (obj && obj->ops == &process_ops) return (struct process *)grab_object( obj );
set_error( STATUS_INVALID_PARAMETER );
return NULL;
}
/* get a process from a handle (and increment the refcount) */
struct process *get_process_from_handle( obj_handle_t handle, unsigned int access )
{
return (struct process *)get_handle_obj( current->process, handle,
access, &process_ops );
}
/* find a dll from its base address */
static inline struct process_dll *find_process_dll( struct process *process, mod_handle_t base )
{
struct process_dll *dll;
LIST_FOR_EACH_ENTRY( dll, &process->dlls, struct process_dll, entry )
{
if (dll->base == base) return dll;
}
return NULL;
}
/* add a dll to a process list */
static struct process_dll *process_load_dll( struct process *process, struct mapping *mapping,
mod_handle_t base, const WCHAR *filename,
data_size_t name_len )
{
struct process_dll *dll;
/* make sure we don't already have one with the same base address */
if (find_process_dll( process, base ))
{
set_error( STATUS_INVALID_PARAMETER );
return NULL;
}
if ((dll = mem_alloc( sizeof(*dll) )))
{
dll->mapping = NULL;
dll->base = base;
dll->filename = NULL;
dll->namelen = name_len;
if (name_len && !(dll->filename = memdup( filename, name_len )))
{
free( dll );
return NULL;
}
if (mapping) dll->mapping = grab_mapping_unless_removable( mapping );
list_add_tail( &process->dlls, &dll->entry );
}
return dll;
}
/* remove a dll from a process list */
static void process_unload_dll( struct process *process, mod_handle_t base )
{
struct process_dll *dll = find_process_dll( process, base );
if (dll && (&dll->entry != list_head( &process->dlls ))) /* main exe can't be unloaded */
{
if (dll->mapping) release_object( dll->mapping );
free( dll->filename );
list_remove( &dll->entry );
free( dll );
generate_debug_event( current, UNLOAD_DLL_DEBUG_EVENT, &base );
}
else set_error( STATUS_INVALID_PARAMETER );
}
/* terminate a process with the given exit code */
static void terminate_process( struct process *process, struct thread *skip, int exit_code )
{
struct thread *thread;
grab_object( process ); /* make sure it doesn't get freed when threads die */
process->is_terminating = 1;
restart:
LIST_FOR_EACH_ENTRY( thread, &process->thread_list, struct thread, proc_entry )
{
if (exit_code) thread->exit_code = exit_code;
if (thread == skip) continue;
if (thread->state == TERMINATED) continue;
kill_thread( thread, 1 );
goto restart;
}
release_object( process );
}
/* kill all processes */
static void kill_all_processes(void)
{
for (;;)
{
struct process *process;
LIST_FOR_EACH_ENTRY( process, &process_list, struct process, entry )
{
if (process->running_threads) break;
}
if (&process->entry == &process_list) break; /* no process found */
terminate_process( process, NULL, 1 );
}
}
/* kill all processes being attached to a console renderer */
void kill_console_processes( struct thread *renderer, int exit_code )
{
for (;;) /* restart from the beginning of the list every time */
{
struct process *process;
/* find the first process being attached to 'renderer' and still running */
LIST_FOR_EACH_ENTRY( process, &process_list, struct process, entry )
{
if (process == renderer->process) continue;
if (!process->running_threads) continue;
if (process->console && console_get_renderer( process->console ) == renderer) break;
}
if (&process->entry == &process_list) break; /* no process found */
terminate_process( process, NULL, exit_code );
}
}
/* a process has been killed (i.e. its last thread died) */
static void process_killed( struct process *process )
{
struct list *ptr;
assert( list_empty( &process->thread_list ));
process->end_time = current_time;
if (!process->is_system) close_process_desktop( process );
process->winstation = 0;
process->desktop = 0;
close_process_handles( process );
if (process->idle_event)
{
release_object( process->idle_event );
process->idle_event = NULL;
}
/* close the console attached to this process, if any */
free_console( process );
while ((ptr = list_head( &process->rawinput_devices )))
{
struct rawinput_device_entry *entry = LIST_ENTRY( ptr, struct rawinput_device_entry, entry );
list_remove( &entry->entry );
free( entry );
}
while ((ptr = list_head( &process->dlls )))
{
struct process_dll *dll = LIST_ENTRY( ptr, struct process_dll, entry );
if (dll->mapping) release_object( dll->mapping );
free( dll->filename );
list_remove( &dll->entry );
free( dll );
}
destroy_process_classes( process );
free_process_user_handles( process );
remove_process_locks( process );
set_process_startup_state( process, STARTUP_ABORTED );
finish_process_tracing( process );
release_job_process( process );
start_sigkill_timer( process );
wake_up( &process->obj, 0 );
}
/* add a thread to a process running threads list */
void add_process_thread( struct process *process, struct thread *thread )
{
list_add_tail( &process->thread_list, &thread->proc_entry );
if (!process->running_threads++)
{
running_processes++;
if (!process->is_system)
{
if (!user_processes++ && shutdown_timeout)
{
remove_timeout_user( shutdown_timeout );
shutdown_timeout = NULL;
}
}
}
grab_object( thread );
}
/* remove a thread from a process running threads list */
void remove_process_thread( struct process *process, struct thread *thread )
{
assert( process->running_threads > 0 );
assert( !list_empty( &process->thread_list ));
list_remove( &thread->proc_entry );
if (!--process->running_threads)
{
/* we have removed the last running thread, exit the process */
process->exit_code = thread->exit_code;
generate_debug_event( thread, EXIT_PROCESS_DEBUG_EVENT, process );
process_killed( process );
}
else generate_debug_event( thread, EXIT_THREAD_DEBUG_EVENT, thread );
release_object( thread );
}
/* suspend all the threads of a process */
void suspend_process( struct process *process )
{
if (!process->suspend++)
{
struct list *ptr, *next;
LIST_FOR_EACH_SAFE( ptr, next, &process->thread_list )
{
struct thread *thread = LIST_ENTRY( ptr, struct thread, proc_entry );
if (!thread->suspend) stop_thread( thread );
}
}
}
/* resume all the threads of a process */
void resume_process( struct process *process )
{
assert (process->suspend > 0);
if (!--process->suspend)
{
struct list *ptr, *next;
LIST_FOR_EACH_SAFE( ptr, next, &process->thread_list )
{
struct thread *thread = LIST_ENTRY( ptr, struct thread, proc_entry );
if (!thread->suspend) wake_thread( thread );
}
}
}
/* kill a process on the spot */
void kill_process( struct process *process, int violent_death )
{
if (!violent_death && process->msg_fd) /* normal termination on pipe close */
{
release_object( process->msg_fd );
process->msg_fd = NULL;
}
if (process->sigkill_timeout) /* already waiting for it to die */
{
remove_timeout_user( process->sigkill_timeout );
process->sigkill_timeout = NULL;
process_died( process );
return;
}
if (violent_death) terminate_process( process, NULL, 1 );
else
{
struct list *ptr;
grab_object( process ); /* make sure it doesn't get freed when threads die */
while ((ptr = list_head( &process->thread_list )))
{
struct thread *thread = LIST_ENTRY( ptr, struct thread, proc_entry );
kill_thread( thread, 0 );
}
release_object( process );
}
}
/* kill all processes being debugged by a given thread */
void kill_debugged_processes( struct thread *debugger, int exit_code )
{
for (;;) /* restart from the beginning of the list every time */
{
struct process *process;
/* find the first process being debugged by 'debugger' and still running */
LIST_FOR_EACH_ENTRY( process, &process_list, struct process, entry )
{
if (!process->running_threads) continue;
if (process->debugger == debugger) break;
}
if (&process->entry == &process_list) break; /* no process found */
process->debugger = NULL;
terminate_process( process, NULL, exit_code );
}
}
/* trigger a breakpoint event in a given process */
void break_process( struct process *process )
{
struct thread *thread;
suspend_process( process );
LIST_FOR_EACH_ENTRY( thread, &process->thread_list, struct thread, proc_entry )
{
if (thread->context) /* inside an exception event already */
{
break_thread( thread );
goto done;
}
}
if ((thread = get_process_first_thread( process ))) thread->debug_break = 1;
else set_error( STATUS_ACCESS_DENIED );
done:
resume_process( process );
}
/* detach a debugger from all its debuggees */
void detach_debugged_processes( struct thread *debugger )
{
struct process *process;
LIST_FOR_EACH_ENTRY( process, &process_list, struct process, entry )
{
if (process->debugger == debugger && process->running_threads)
{
debugger_detach( process, debugger );
}
}
}
void enum_processes( int (*cb)(struct process*, void*), void *user )
{
struct list *ptr, *next;
LIST_FOR_EACH_SAFE( ptr, next, &process_list )
{
struct process *process = LIST_ENTRY( ptr, struct process, entry );
if ((cb)(process, user)) break;
}
}
/* set the debugged flag in the process PEB */
int set_process_debug_flag( struct process *process, int flag )
{
char data = (flag != 0);
/* BeingDebugged flag is the byte at offset 2 in the PEB */
return write_process_memory( process, process->peb + 2, 1, &data );
}
/* take a snapshot of currently running processes */
struct process_snapshot *process_snap( int *count )
{
struct process_snapshot *snapshot, *ptr;
struct process *process;
if (!running_processes) return NULL;
if (!(snapshot = mem_alloc( sizeof(*snapshot) * running_processes )))
return NULL;
ptr = snapshot;
LIST_FOR_EACH_ENTRY( process, &process_list, struct process, entry )
{
if (!process->running_threads) continue;
ptr->process = process;
ptr->threads = process->running_threads;
ptr->count = process->obj.refcount;
ptr->priority = process->priority;
ptr->handles = get_handle_table_count(process);
ptr->unix_pid = process->unix_pid;
grab_object( process );
ptr++;
}
if (!(*count = ptr - snapshot))
{
free( snapshot );
snapshot = NULL;
}
return snapshot;
}
/* create a new process */
DECL_HANDLER(new_process)
{
struct startup_info *info;
struct thread *thread;
struct process *process;
struct process *parent = current->process;
int socket_fd = thread_get_inflight_fd( current, req->socket_fd );
if (socket_fd == -1)
{
set_error( STATUS_INVALID_PARAMETER );
return;
}
if (fcntl( socket_fd, F_SETFL, O_NONBLOCK ) == -1)
{
set_error( STATUS_INVALID_HANDLE );
close( socket_fd );
return;
}
if (shutdown_stage)
{
set_error( STATUS_SHUTDOWN_IN_PROGRESS );
close( socket_fd );
return;
}
if (!is_cpu_supported( req->cpu ))
{
close( socket_fd );
return;
}
if (parent->job && (req->create_flags & CREATE_BREAKAWAY_FROM_JOB) &&
!(parent->job->limit_flags & (JOB_OBJECT_LIMIT_BREAKAWAY_OK | JOB_OBJECT_LIMIT_SILENT_BREAKAWAY_OK)))
{
set_error( STATUS_ACCESS_DENIED );
close( socket_fd );
return;
}
if (!req->info_size) /* create an orphaned process */
{
create_process( socket_fd, NULL, 0 );
return;
}
/* build the startup info for a new process */
if (!(info = alloc_object( &startup_info_ops )))
{
close( socket_fd );
return;
}
info->exe_file = NULL;
info->process = NULL;
info->data = NULL;
if (req->exe_file &&
!(info->exe_file = get_file_obj( current->process, req->exe_file, FILE_READ_DATA )))
{
close( socket_fd );
goto done;
}
info->data_size = get_req_data_size();
info->info_size = min( req->info_size, info->data_size );
if (req->info_size < sizeof(*info->data))
{
/* make sure we have a full startup_info_t structure */
data_size_t env_size = info->data_size - info->info_size;
data_size_t info_size = min( req->info_size, FIELD_OFFSET( startup_info_t, curdir_len ));
if (!(info->data = mem_alloc( sizeof(*info->data) + env_size )))
{
close( socket_fd );
goto done;
}
memcpy( info->data, get_req_data(), info_size );
memset( (char *)info->data + info_size, 0, sizeof(*info->data) - info_size );
memcpy( info->data + 1, (const char *)get_req_data() + req->info_size, env_size );
info->info_size = sizeof(startup_info_t);
info->data_size = info->info_size + env_size;
}
else
{
data_size_t pos = sizeof(*info->data);
if (!(info->data = memdup( get_req_data(), info->data_size )))
{
close( socket_fd );
goto done;
}
#define FIXUP_LEN(len) do { (len) = min( (len), info->info_size - pos ); pos += (len); } while(0)
FIXUP_LEN( info->data->curdir_len );
FIXUP_LEN( info->data->dllpath_len );
FIXUP_LEN( info->data->imagepath_len );
FIXUP_LEN( info->data->cmdline_len );
FIXUP_LEN( info->data->title_len );
FIXUP_LEN( info->data->desktop_len );
FIXUP_LEN( info->data->shellinfo_len );
FIXUP_LEN( info->data->runtime_len );
#undef FIXUP_LEN
}
if (!(thread = create_process( socket_fd, current, req->inherit_all ))) goto done;
process = thread->process;
process->startup_info = (struct startup_info *)grab_object( info );
if (parent->job
&& !(req->create_flags & CREATE_BREAKAWAY_FROM_JOB)
&& !(parent->job->limit_flags & JOB_OBJECT_LIMIT_SILENT_BREAKAWAY_OK))
{
add_job_process( parent->job, process );
}
/* connect to the window station */
connect_process_winstation( process, current );
/* thread will be actually suspended in init_done */
if (req->create_flags & CREATE_SUSPENDED) thread->suspend++;
/* set the process console */
if (!(req->create_flags & (DETACHED_PROCESS | CREATE_NEW_CONSOLE)))
{
/* FIXME: some better error checking should be done...
* like if hConOut and hConIn are console handles, then they should be on the same
* physical console
*/
inherit_console( current, process, req->inherit_all ? info->data->hstdin : 0 );
}
if (!req->inherit_all && !(req->create_flags & CREATE_NEW_CONSOLE))
{
info->data->hstdin = duplicate_handle( parent, info->data->hstdin, process,
0, OBJ_INHERIT, DUPLICATE_SAME_ACCESS );
info->data->hstdout = duplicate_handle( parent, info->data->hstdout, process,
0, OBJ_INHERIT, DUPLICATE_SAME_ACCESS );
info->data->hstderr = duplicate_handle( parent, info->data->hstderr, process,
0, OBJ_INHERIT, DUPLICATE_SAME_ACCESS );
/* some handles above may have been invalid; this is not an error */
if (get_error() == STATUS_INVALID_HANDLE ||
get_error() == STATUS_OBJECT_TYPE_MISMATCH) clear_error();
}
/* attach to the debugger if requested */
if (req->create_flags & (DEBUG_PROCESS | DEBUG_ONLY_THIS_PROCESS))
{
set_process_debugger( process, current );
process->debug_children = !(req->create_flags & DEBUG_ONLY_THIS_PROCESS);
}
else if (parent->debugger && parent->debug_children)
{
set_process_debugger( process, parent->debugger );
/* debug_children is set to 1 by default */
}
if (!(req->create_flags & CREATE_NEW_PROCESS_GROUP))
process->group_id = parent->group_id;
info->process = (struct process *)grab_object( process );
reply->info = alloc_handle( current->process, info, SYNCHRONIZE, 0 );
reply->pid = get_process_id( process );
reply->tid = get_thread_id( thread );
reply->phandle = alloc_handle( parent, process, req->process_access, req->process_attr );
reply->thandle = alloc_handle( parent, thread, req->thread_access, req->thread_attr );
done:
release_object( info );
}
/* Retrieve information about a newly started process */
DECL_HANDLER(get_new_process_info)
{
struct startup_info *info;
if ((info = (struct startup_info *)get_handle_obj( current->process, req->info,
0, &startup_info_ops )))
{
reply->success = is_process_init_done( info->process );
reply->exit_code = info->process->exit_code;
release_object( info );
}
}
/* Retrieve the new process startup info */
DECL_HANDLER(get_startup_info)
{
struct process *process = current->process;
struct startup_info *info = process->startup_info;
data_size_t size;
if (!info) return;
if (info->exe_file &&
!(reply->exe_file = alloc_handle( process, info->exe_file, GENERIC_READ, 0 ))) return;
/* we return the data directly without making a copy so this can only be called once */
reply->info_size = info->info_size;
size = info->data_size;
if (size > get_reply_max_size()) size = get_reply_max_size();
set_reply_data_ptr( info->data, size );
info->data = NULL;
info->data_size = 0;
}
/* signal the end of the process initialization */
DECL_HANDLER(init_process_done)
{
struct process_dll *dll;
struct process *process = current->process;
if (is_process_init_done(process))
{
set_error( STATUS_INVALID_PARAMETER );
return;
}
if (!(dll = find_process_dll( process, req->module )))
{
set_error( STATUS_DLL_NOT_FOUND );
return;
}
/* main exe is the first in the dll list */
list_remove( &dll->entry );
list_add_head( &process->dlls, &dll->entry );
process->ldt_copy = req->ldt_copy;
process->start_time = current_time;
current->entry_point = req->entry;
generate_startup_debug_events( process, req->entry );
set_process_startup_state( process, STARTUP_DONE );
if (req->gui) process->idle_event = create_event( NULL, NULL, 0, 1, 0, NULL );
stop_thread_if_suspended( current );
if (process->debugger) set_process_debug_flag( process, 1 );
}
/* open a handle to a process */
DECL_HANDLER(open_process)
{
struct process *process = get_process_from_id( req->pid );
reply->handle = 0;
if (process)
{
reply->handle = alloc_handle( current->process, process, req->access, req->attributes );
release_object( process );
}
}
/* terminate a process */
DECL_HANDLER(terminate_process)
{
struct process *process;
if (req->handle)
{
process = get_process_from_handle( req->handle, PROCESS_TERMINATE );
if (!process) return;
}
else process = (struct process *)grab_object( current->process );
reply->self = (current->process == process);
terminate_process( process, current, req->exit_code );
release_object( process );
}
/* fetch information about a process */
DECL_HANDLER(get_process_info)
{
struct process *process;
if ((process = get_process_from_handle( req->handle, PROCESS_QUERY_LIMITED_INFORMATION )))
{
reply->pid = get_process_id( process );
reply->ppid = process->parent ? get_process_id( process->parent ) : 0;
reply->exit_code = process->exit_code;
reply->priority = process->priority;
reply->affinity = process->affinity;
reply->peb = process->peb;
reply->start_time = process->start_time;
reply->end_time = process->end_time;
reply->cpu = process->cpu;
reply->debugger_present = !!process->debugger;
reply->debug_children = process->debug_children;
release_object( process );
}
}
static void set_process_affinity( struct process *process, affinity_t affinity )
{
struct thread *thread;
if (!process->running_threads)
{
set_error( STATUS_PROCESS_IS_TERMINATING );
return;
}
process->affinity = affinity;
LIST_FOR_EACH_ENTRY( thread, &process->thread_list, struct thread, proc_entry )
{
set_thread_affinity( thread, affinity );
}
}
/* set information about a process */
DECL_HANDLER(set_process_info)
{
struct process *process;
if ((process = get_process_from_handle( req->handle, PROCESS_SET_INFORMATION )))
{
if (req->mask & SET_PROCESS_INFO_PRIORITY) process->priority = req->priority;
if (req->mask & SET_PROCESS_INFO_AFFINITY) set_process_affinity( process, req->affinity );
release_object( process );
}
}
/* read data from a process address space */
DECL_HANDLER(read_process_memory)
{
struct process *process;
data_size_t len = get_reply_max_size();
if (!(process = get_process_from_handle( req->handle, PROCESS_VM_READ ))) return;
if (len)
{
char *buffer = mem_alloc( len );
if (buffer)
{
if (read_process_memory( process, req->addr, len, buffer ))
set_reply_data_ptr( buffer, len );
else
free( buffer );
}
}
release_object( process );
}
/* write data to a process address space */
DECL_HANDLER(write_process_memory)
{
struct process *process;
if ((process = get_process_from_handle( req->handle, PROCESS_VM_WRITE )))
{
data_size_t len = get_req_data_size();
if (len) write_process_memory( process, req->addr, len, get_req_data() );
else set_error( STATUS_INVALID_PARAMETER );
release_object( process );
}
}
/* notify the server that a dll has been loaded */
DECL_HANDLER(load_dll)
{
struct process_dll *dll;
struct mapping *mapping = NULL;
if (req->mapping && !(mapping = get_mapping_obj( current->process, req->mapping, SECTION_QUERY )))
return;
if ((dll = process_load_dll( current->process, mapping, req->base,
get_req_data(), get_req_data_size() )))
{
dll->size = req->size;
dll->dbg_offset = req->dbg_offset;
dll->dbg_size = req->dbg_size;
dll->name = req->name;
/* only generate event if initialization is done */
if (is_process_init_done( current->process ))
generate_debug_event( current, LOAD_DLL_DEBUG_EVENT, dll );
}
if (mapping) release_object( mapping );
}
/* notify the server that a dll is being unloaded */
DECL_HANDLER(unload_dll)
{
process_unload_dll( current->process, req->base );
}
/* retrieve information about a module in a process */
DECL_HANDLER(get_dll_info)
{
struct process *process;
if ((process = get_process_from_handle( req->handle, PROCESS_QUERY_INFORMATION )))
{
struct process_dll *dll;
if (req->base_address)
dll = find_process_dll( process, req->base_address );
else /* NULL means main module */
dll = list_head( &process->dlls ) ?
LIST_ENTRY(list_head( &process->dlls ), struct process_dll, entry) : NULL;
if (dll)
{
reply->size = dll->size;
reply->entry_point = 0; /* FIXME */
reply->filename_len = dll->namelen;
if (dll->filename)
{
if (dll->namelen <= get_reply_max_size())
set_reply_data( dll->filename, dll->namelen );
else
set_error( STATUS_BUFFER_TOO_SMALL );
}
}
else
set_error( STATUS_DLL_NOT_FOUND );
release_object( process );
}
}
/* retrieve the process idle event */
DECL_HANDLER(get_process_idle_event)
{
struct process *process;
reply->event = 0;
if ((process = get_process_from_handle( req->handle, PROCESS_QUERY_INFORMATION )))
{
if (process->idle_event && process != current->process)
reply->event = alloc_handle( current->process, process->idle_event,
EVENT_ALL_ACCESS, 0 );
release_object( process );
}
}
/* make the current process a system process */
DECL_HANDLER(make_process_system)
{
struct process *process = current->process;
if (!shutdown_event)
{
if (!(shutdown_event = create_event( NULL, NULL, 0, 1, 0, NULL ))) return;
make_object_static( (struct object *)shutdown_event );
}
if (!(reply->event = alloc_handle( current->process, shutdown_event, SYNCHRONIZE, 0 )))
return;
if (!process->is_system)
{
process->is_system = 1;
close_process_desktop( process );
if (!--user_processes && !shutdown_stage && master_socket_timeout != TIMEOUT_INFINITE)
shutdown_timeout = add_timeout_user( master_socket_timeout, server_shutdown_timeout, NULL );
}
}
/* create a new job object */
DECL_HANDLER(create_job)
{
struct job *job;
struct unicode_str name;
struct directory *root;
const struct security_descriptor *sd;
const struct object_attributes *objattr = get_req_object_attributes( &sd, &name, &root );
if (!objattr) return;
if ((job = create_job_object( root, &name, objattr->attributes, sd )))
{
if (get_error() == STATUS_OBJECT_NAME_EXISTS)
reply->handle = alloc_handle( current->process, job, req->access, objattr->attributes );
else
reply->handle = alloc_handle_no_access_check( current->process, job,
req->access, objattr->attributes );
release_object( job );
}
if (root) release_object( root );
}
/* open a job object */
DECL_HANDLER(open_job)
{
struct unicode_str name = get_req_unicode_str();
reply->handle = open_object( current->process, req->rootdir, req->access,
&job_ops, &name, req->attributes );
}
/* assign a job object to a process */
DECL_HANDLER(assign_job)
{
struct process *process;
struct job *job = get_job_obj( current->process, req->job, JOB_OBJECT_ASSIGN_PROCESS );
if (!job) return;
if ((process = get_process_from_handle( req->process, PROCESS_SET_QUOTA | PROCESS_TERMINATE )))
{
add_job_process( job, process );
release_object( process );
}
release_object( job );
}
/* check if a process is associated with a job */
DECL_HANDLER(process_in_job)
{
struct process *process;
struct job *job;
if (!(process = get_process_from_handle( req->process, PROCESS_QUERY_INFORMATION )))
return;
if (!req->job)
{
set_error( process->job ? STATUS_PROCESS_IN_JOB : STATUS_PROCESS_NOT_IN_JOB );
}
else if ((job = get_job_obj( current->process, req->job, JOB_OBJECT_QUERY )))
{
set_error( process->job == job ? STATUS_PROCESS_IN_JOB : STATUS_PROCESS_NOT_IN_JOB );
release_object( job );
}
release_object( process );
}
/* terminate all processes associated with the job */
DECL_HANDLER(terminate_job)
{
struct job *job = get_job_obj( current->process, req->handle, JOB_OBJECT_TERMINATE );
if (!job) return;
terminate_job( job, req->status );
release_object( job );
}
/* update limits of the job object */
DECL_HANDLER(set_job_limits)
{
struct job *job = get_job_obj( current->process, req->handle, JOB_OBJECT_SET_ATTRIBUTES );
if (!job) return;
job->limit_flags = req->limit_flags;
release_object( job );
}
/* set the jobs completion port */
DECL_HANDLER(set_job_completion_port)
{
struct job *job = get_job_obj( current->process, req->job, JOB_OBJECT_SET_ATTRIBUTES );
if (!job) return;
if (!job->completion_port)
{
job->completion_port = get_completion_obj( current->process, req->port, IO_COMPLETION_MODIFY_STATE );
job->completion_key = req->key;
}
else
set_error( STATUS_INVALID_PARAMETER );
release_object( job );
}
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