766 lines
24 KiB
C
766 lines
24 KiB
C
/*
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* Server-side process management
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*
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* Copyright (C) 1998 Alexandre Julliard
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*/
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#include "config.h"
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#include <assert.h>
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#include <errno.h>
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#include <limits.h>
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#include <signal.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#ifdef HAVE_SYS_SOCKET_H
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# include <sys/socket.h>
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#endif
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#include <unistd.h>
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#include "winbase.h"
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#include "winnt.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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/* process structure */
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static struct process *first_process;
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static int running_processes;
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/* process operations */
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static void process_dump( struct object *obj, int verbose );
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static int process_signaled( struct object *obj, struct thread *thread );
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static void process_destroy( struct object *obj );
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static const struct object_ops process_ops =
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{
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sizeof(struct process), /* size */
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process_dump, /* dump */
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add_queue, /* add_queue */
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remove_queue, /* remove_queue */
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process_signaled, /* signaled */
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no_satisfied, /* satisfied */
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NULL, /* get_poll_events */
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NULL, /* poll_event */
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no_read_fd, /* get_read_fd */
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no_write_fd, /* get_write_fd */
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no_flush, /* flush */
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no_get_file_info, /* get_file_info */
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process_destroy /* destroy */
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};
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/* set the process creation info */
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static int set_creation_info( struct process *process, struct new_process_request *req,
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const char *cmd_line, size_t len )
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{
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if (!(process->info = mem_alloc( sizeof(*process->info) + len ))) return 0;
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if (req)
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{
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/* copy the request structure */
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memcpy( process->info, req, sizeof(*req) );
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}
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else /* no request, use defaults */
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{
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req = process->info;
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req->inherit = 0;
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req->inherit_all = 0;
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req->create_flags = CREATE_NEW_CONSOLE;
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req->start_flags = STARTF_USESTDHANDLES;
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req->exe_file = -1;
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req->hstdin = -1;
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req->hstdout = -1;
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req->hstderr = -1;
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req->event = -1;
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req->cmd_show = 0;
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req->env_ptr = NULL;
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}
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memcpy( process->info->cmdline, cmd_line, len );
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process->info->cmdline[len] = 0;
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process->create_flags = process->info->create_flags;
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return 1;
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}
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/* set the console and stdio handles for a newly created process */
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static int set_process_console( struct process *process, struct process *parent )
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{
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struct new_process_request *info = process->info;
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if (process->create_flags & CREATE_NEW_CONSOLE)
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{
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if (!alloc_console( process )) return 0;
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}
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else if (!(process->create_flags & DETACHED_PROCESS))
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{
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if (parent->console_in) process->console_in = grab_object( parent->console_in );
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if (parent->console_out) process->console_out = grab_object( parent->console_out );
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}
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if (parent)
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{
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if (!info->inherit_all && !(info->start_flags & STARTF_USESTDHANDLES))
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{
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/* duplicate the handle from the parent into this process */
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info->hstdin = duplicate_handle( parent, info->hstdin, process,
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0, TRUE, DUPLICATE_SAME_ACCESS );
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info->hstdout = duplicate_handle( parent, info->hstdout, process,
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0, TRUE, DUPLICATE_SAME_ACCESS );
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info->hstderr = duplicate_handle( parent, info->hstderr, process,
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0, TRUE, DUPLICATE_SAME_ACCESS );
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}
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}
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else
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{
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/* no parent, use handles to the console for stdio */
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info->hstdin = alloc_handle( process, process->console_in,
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GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE, 1 );
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info->hstdout = alloc_handle( process, process->console_out,
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GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE, 1 );
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info->hstderr = alloc_handle( process, process->console_out,
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GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE, 1 );
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}
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return 1;
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}
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/* create a new process and its main thread */
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struct thread *create_process( int fd, struct process *parent,
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struct new_process_request *req,
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const char *cmd_line, size_t len )
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{
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struct process *process;
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struct thread *thread = NULL;
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if (!(process = alloc_object( &process_ops, -1 )))
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{
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close( fd );
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return NULL;
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}
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process->next = NULL;
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process->prev = NULL;
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process->thread_list = NULL;
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process->debugger = NULL;
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process->handles = NULL;
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process->exit_code = STILL_ACTIVE;
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process->running_threads = 0;
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process->priority = NORMAL_PRIORITY_CLASS;
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process->affinity = 1;
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process->suspend = 0;
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process->create_flags = 0;
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process->console_in = NULL;
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process->console_out = NULL;
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process->init_event = NULL;
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process->info = NULL;
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process->ldt_copy = NULL;
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process->ldt_flags = NULL;
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process->exe.next = NULL;
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process->exe.prev = NULL;
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process->exe.file = NULL;
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process->exe.dbg_offset = 0;
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process->exe.dbg_size = 0;
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gettimeofday( &process->start_time, NULL );
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if ((process->next = first_process) != NULL) process->next->prev = process;
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first_process = process;
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/* copy the request structure */
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if (!set_creation_info( process, req, cmd_line, len )) goto error;
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if (process->info->inherit_all)
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process->handles = copy_handle_table( process, parent );
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else
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process->handles = alloc_handle_table( process, 0 );
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if (!process->handles) goto error;
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/* alloc a handle for the process itself */
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alloc_handle( process, process, PROCESS_ALL_ACCESS, 0 );
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/* retrieve the main exe file */
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if (process->info->exe_file != -1)
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{
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if (!(process->exe.file = get_file_obj( parent, process->info->exe_file,
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GENERIC_READ ))) goto error;
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process->info->exe_file = -1;
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}
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/* get the init done event */
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if (process->info->event != -1)
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{
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if (!(process->init_event = get_event_obj( parent, process->info->event,
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EVENT_MODIFY_STATE ))) goto error;
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}
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/* set the process console */
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if (!set_process_console( process, parent )) goto error;
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/* create the main thread */
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if (!(thread = create_thread( fd, process, (process->create_flags & CREATE_SUSPENDED) != 0)))
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goto error;
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/* attach to the debugger if requested */
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if (process->create_flags & (DEBUG_PROCESS | DEBUG_ONLY_THIS_PROCESS))
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set_process_debugger( process, current );
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else if (parent && parent->debugger && !(parent->create_flags & DEBUG_ONLY_THIS_PROCESS))
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set_process_debugger( process, parent->debugger );
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release_object( process );
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return thread;
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error:
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close( fd );
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free_console( process );
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if (process->handles) release_object( process->handles );
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release_object( process );
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return NULL;
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}
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/* destroy a process when its refcount is 0 */
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static void process_destroy( struct object *obj )
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{
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struct process *process = (struct process *)obj;
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assert( obj->ops == &process_ops );
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/* we can't have a thread remaining */
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assert( !process->thread_list );
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if (process->next) process->next->prev = process->prev;
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if (process->prev) process->prev->next = process->next;
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else first_process = process->next;
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if (process->info) free( process->info );
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if (process->init_event) release_object( process->init_event );
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if (process->exe.file) release_object( process->exe.file );
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}
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/* dump a process on stdout for debugging purposes */
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static void process_dump( struct object *obj, int verbose )
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{
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struct process *process = (struct process *)obj;
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assert( obj->ops == &process_ops );
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fprintf( stderr, "Process next=%p prev=%p console=%p/%p handles=%p\n",
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process->next, process->prev, process->console_in, process->console_out,
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process->handles );
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}
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static int process_signaled( struct object *obj, struct thread *thread )
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{
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struct process *process = (struct process *)obj;
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return !process->running_threads;
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}
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/* get a process from an id (and increment the refcount) */
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struct process *get_process_from_id( void *id )
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{
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struct process *p = first_process;
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while (p && (p != id)) p = p->next;
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if (p) grab_object( p );
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else set_error( STATUS_INVALID_PARAMETER );
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return p;
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}
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/* get a process from a handle (and increment the refcount) */
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struct process *get_process_from_handle( int handle, unsigned int access )
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{
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return (struct process *)get_handle_obj( current->process, handle,
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access, &process_ops );
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}
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/* add a dll to a process list */
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static struct process_dll *process_load_dll( struct process *process, struct file *file,
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void *base )
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{
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struct process_dll *dll;
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/* make sure we don't already have one with the same base address */
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for (dll = process->exe.next; dll; dll = dll->next) if (dll->base == base)
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{
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set_error( STATUS_INVALID_PARAMETER );
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return NULL;
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}
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if ((dll = mem_alloc( sizeof(*dll) )))
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{
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dll->prev = &process->exe;
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dll->file = NULL;
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dll->base = base;
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if (file) dll->file = (struct file *)grab_object( file );
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if ((dll->next = process->exe.next)) dll->next->prev = dll;
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process->exe.next = dll;
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}
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return dll;
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}
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/* remove a dll from a process list */
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static void process_unload_dll( struct process *process, void *base )
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{
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struct process_dll *dll;
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for (dll = process->exe.next; dll; dll = dll->next)
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{
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if (dll->base == base)
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{
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if (dll->file) release_object( dll->file );
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if (dll->next) dll->next->prev = dll->prev;
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if (dll->prev) dll->prev->next = dll->next;
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free( dll );
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generate_debug_event( current, UNLOAD_DLL_DEBUG_EVENT, base );
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return;
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}
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}
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set_error( STATUS_INVALID_PARAMETER );
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}
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/* a process has been killed (i.e. its last thread died) */
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static void process_killed( struct process *process )
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{
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assert( !process->thread_list );
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gettimeofday( &process->end_time, NULL );
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release_object( process->handles );
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process->handles = NULL;
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free_console( process );
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while (process->exe.next)
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{
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struct process_dll *dll = process->exe.next;
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process->exe.next = dll->next;
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if (dll->file) release_object( dll->file );
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free( dll );
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}
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if (process->exe.file) release_object( process->exe.file );
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process->exe.file = NULL;
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wake_up( &process->obj, 0 );
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if (!--running_processes)
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{
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/* last process died, close global handles */
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close_global_handles();
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/* this will cause the select loop to terminate */
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if (!persistent_server) close_master_socket();
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}
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}
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/* add a thread to a process running threads list */
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void add_process_thread( struct process *process, struct thread *thread )
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{
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thread->proc_next = process->thread_list;
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thread->proc_prev = NULL;
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if (thread->proc_next) thread->proc_next->proc_prev = thread;
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process->thread_list = thread;
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if (!process->running_threads++) running_processes++;
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grab_object( thread );
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}
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/* remove a thread from a process running threads list */
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void remove_process_thread( struct process *process, struct thread *thread )
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{
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assert( process->running_threads > 0 );
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assert( process->thread_list );
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if (thread->proc_next) thread->proc_next->proc_prev = thread->proc_prev;
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if (thread->proc_prev) thread->proc_prev->proc_next = thread->proc_next;
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else process->thread_list = thread->proc_next;
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if (!--process->running_threads)
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{
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/* we have removed the last running thread, exit the process */
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process->exit_code = thread->exit_code;
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generate_debug_event( thread, EXIT_PROCESS_DEBUG_EVENT, process );
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process_killed( process );
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}
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else generate_debug_event( thread, EXIT_THREAD_DEBUG_EVENT, thread );
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release_object( thread );
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}
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/* suspend all the threads of a process */
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void suspend_process( struct process *process )
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{
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if (!process->suspend++)
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{
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struct thread *thread = process->thread_list;
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for (; thread; thread = thread->proc_next)
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{
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if (!thread->suspend) stop_thread( thread );
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}
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}
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}
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/* resume all the threads of a process */
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void resume_process( struct process *process )
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{
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assert (process->suspend > 0);
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if (!--process->suspend)
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{
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struct thread *thread = process->thread_list;
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for (; thread; thread = thread->proc_next)
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{
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if (!thread->suspend) continue_thread( thread );
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}
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}
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}
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/* kill a process on the spot */
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void kill_process( struct process *process, int exit_code )
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{
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while (process->thread_list)
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kill_thread( process->thread_list, exit_code );
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}
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/* kill all processes being debugged by a given thread */
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void kill_debugged_processes( struct thread *debugger, int exit_code )
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{
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for (;;) /* restart from the beginning of the list every time */
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{
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struct process *process = first_process;
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/* find the first process being debugged by 'debugger' and still running */
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while (process && (process->debugger != debugger || !process->running_threads))
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process = process->next;
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if (!process) return;
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process->debugger = NULL;
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kill_process( process, exit_code );
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}
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}
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/* get all information about a process */
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static void get_process_info( struct process *process, struct get_process_info_request *req )
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{
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req->pid = process;
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req->debugged = (process->debugger != 0);
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req->exit_code = process->exit_code;
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req->priority = process->priority;
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req->process_affinity = process->affinity;
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req->system_affinity = 1;
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}
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|
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/* set all information about a process */
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static void set_process_info( struct process *process,
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struct set_process_info_request *req )
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{
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if (req->mask & SET_PROCESS_INFO_PRIORITY)
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process->priority = req->priority;
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if (req->mask & SET_PROCESS_INFO_AFFINITY)
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{
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if (req->affinity != 1) set_error( STATUS_INVALID_PARAMETER );
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else process->affinity = req->affinity;
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}
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}
|
|
|
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/* read data from a process memory space */
|
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/* len is the total size (in ints), max is the size we can actually store in the output buffer */
|
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/* we read the total size in all cases to check for permissions */
|
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static void read_process_memory( struct process *process, const int *addr,
|
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size_t len, size_t max, int *dest )
|
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{
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struct thread *thread = process->thread_list;
|
|
|
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if ((unsigned int)addr % sizeof(int)) /* address must be aligned */
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{
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set_error( STATUS_INVALID_PARAMETER );
|
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return;
|
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}
|
|
if (!thread) /* process is dead */
|
|
{
|
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set_error( STATUS_ACCESS_DENIED );
|
|
return;
|
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}
|
|
suspend_thread( thread, 0 );
|
|
if (thread->attached)
|
|
{
|
|
while (len > 0 && max)
|
|
{
|
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if (read_thread_int( thread, addr++, dest++ ) == -1) goto done;
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|
max--;
|
|
len--;
|
|
}
|
|
/* check the rest for read permission */
|
|
if (len > 0)
|
|
{
|
|
int dummy, page = get_page_size() / sizeof(int);
|
|
while (len >= page)
|
|
{
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addr += page;
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len -= page;
|
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if (read_thread_int( thread, addr - 1, &dummy ) == -1) goto done;
|
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}
|
|
if (len && (read_thread_int( thread, addr + len - 1, &dummy ) == -1)) goto done;
|
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}
|
|
}
|
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else set_error( STATUS_ACCESS_DENIED );
|
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done:
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resume_thread( thread );
|
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}
|
|
|
|
/* write data to a process memory space */
|
|
/* len is the total size (in ints), max is the size we can actually read from the input buffer */
|
|
/* we check the total size for write permissions */
|
|
static void write_process_memory( struct process *process, int *addr, size_t len,
|
|
size_t max, unsigned int first_mask,
|
|
unsigned int last_mask, const int *src )
|
|
{
|
|
struct thread *thread = process->thread_list;
|
|
|
|
if (!len || ((unsigned int)addr % sizeof(int))) /* address must be aligned */
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER );
|
|
return;
|
|
}
|
|
if (!thread) /* process is dead */
|
|
{
|
|
set_error( STATUS_ACCESS_DENIED );
|
|
return;
|
|
}
|
|
suspend_thread( thread, 0 );
|
|
if (thread->attached)
|
|
{
|
|
/* first word is special */
|
|
if (len > 1)
|
|
{
|
|
if (write_thread_int( thread, addr++, *src++, first_mask ) == -1) goto done;
|
|
len--;
|
|
max--;
|
|
}
|
|
else last_mask &= first_mask;
|
|
|
|
while (len > 1 && max)
|
|
{
|
|
if (write_thread_int( thread, addr++, *src++, ~0 ) == -1) goto done;
|
|
max--;
|
|
len--;
|
|
}
|
|
|
|
if (max)
|
|
{
|
|
/* last word is special too */
|
|
if (write_thread_int( thread, addr, *src, last_mask ) == -1) goto done;
|
|
}
|
|
else
|
|
{
|
|
/* check the rest for write permission */
|
|
int page = get_page_size() / sizeof(int);
|
|
while (len >= page)
|
|
{
|
|
addr += page;
|
|
len -= page;
|
|
if (write_thread_int( thread, addr - 1, 0, 0 ) == -1) goto done;
|
|
}
|
|
if (len && (write_thread_int( thread, addr + len - 1, 0, 0 ) == -1)) goto done;
|
|
}
|
|
}
|
|
else set_error( STATUS_ACCESS_DENIED );
|
|
done:
|
|
resume_thread( thread );
|
|
}
|
|
|
|
/* 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;
|
|
for (process = first_process; process; process = process->next)
|
|
{
|
|
if (!process->running_threads) continue;
|
|
ptr->process = process;
|
|
ptr->threads = process->running_threads;
|
|
ptr->priority = process->priority;
|
|
grab_object( process );
|
|
ptr++;
|
|
}
|
|
*count = running_processes;
|
|
return snapshot;
|
|
}
|
|
|
|
/* create a new process */
|
|
DECL_HANDLER(new_process)
|
|
{
|
|
size_t len = get_req_strlen( req->cmdline );
|
|
struct thread *thread;
|
|
int sock[2];
|
|
|
|
req->phandle = -1;
|
|
req->thandle = -1;
|
|
req->pid = NULL;
|
|
req->tid = NULL;
|
|
|
|
if (socketpair( AF_UNIX, SOCK_STREAM, 0, sock ) == -1)
|
|
{
|
|
file_set_error();
|
|
return;
|
|
}
|
|
|
|
if ((thread = create_process( sock[0], current->process, req, req->cmdline, len )))
|
|
{
|
|
int phandle = alloc_handle( current->process, thread->process,
|
|
PROCESS_ALL_ACCESS, req->inherit );
|
|
if ((req->phandle = phandle) != -1)
|
|
{
|
|
if ((req->thandle = alloc_handle( current->process, thread,
|
|
THREAD_ALL_ACCESS, req->inherit )) != -1)
|
|
{
|
|
/* thread object will be released when the thread gets killed */
|
|
set_reply_fd( current, sock[1] );
|
|
req->pid = thread->process;
|
|
req->tid = thread;
|
|
return;
|
|
}
|
|
close_handle( current->process, phandle );
|
|
}
|
|
release_object( thread );
|
|
}
|
|
close( sock[1] );
|
|
}
|
|
|
|
/* initialize a new process */
|
|
DECL_HANDLER(init_process)
|
|
{
|
|
struct new_process_request *info;
|
|
|
|
if (!current->unix_pid)
|
|
{
|
|
fatal_protocol_error( current, "init_process: init_thread not called yet\n" );
|
|
return;
|
|
}
|
|
if (!(info = current->process->info))
|
|
{
|
|
fatal_protocol_error( current, "init_process: called twice\n" );
|
|
return;
|
|
}
|
|
current->process->ldt_copy = req->ldt_copy;
|
|
current->process->ldt_flags = req->ldt_flags;
|
|
current->process->info = NULL;
|
|
req->exe_file = -1;
|
|
req->start_flags = info->start_flags;
|
|
req->hstdin = info->hstdin;
|
|
req->hstdout = info->hstdout;
|
|
req->hstderr = info->hstderr;
|
|
req->cmd_show = info->cmd_show;
|
|
req->env_ptr = info->env_ptr;
|
|
strcpy( req->cmdline, info->cmdline );
|
|
if (current->process->exe.file)
|
|
req->exe_file = alloc_handle( current->process, current->process->exe.file,
|
|
GENERIC_READ, 0 );
|
|
free( info );
|
|
}
|
|
|
|
/* signal the end of the process initialization */
|
|
DECL_HANDLER(init_process_done)
|
|
{
|
|
struct process *process = current->process;
|
|
if (!process->init_event)
|
|
{
|
|
fatal_protocol_error( current, "init_process_done: no event\n" );
|
|
return;
|
|
}
|
|
current->entry = req->entry;
|
|
process->exe.base = req->module;
|
|
generate_startup_debug_events( current->process );
|
|
set_event( process->init_event );
|
|
release_object( process->init_event );
|
|
process->init_event = NULL;
|
|
if (current->suspend + current->process->suspend > 0) stop_thread( current );
|
|
req->debugged = (current->process->debugger != 0);
|
|
}
|
|
|
|
/* open a handle to a process */
|
|
DECL_HANDLER(open_process)
|
|
{
|
|
struct process *process = get_process_from_id( req->pid );
|
|
req->handle = -1;
|
|
if (process)
|
|
{
|
|
req->handle = alloc_handle( current->process, process, req->access, req->inherit );
|
|
release_object( process );
|
|
}
|
|
}
|
|
|
|
/* terminate a process */
|
|
DECL_HANDLER(terminate_process)
|
|
{
|
|
struct process *process;
|
|
|
|
if ((process = get_process_from_handle( req->handle, PROCESS_TERMINATE )))
|
|
{
|
|
kill_process( process, 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_INFORMATION )))
|
|
{
|
|
get_process_info( process, req );
|
|
release_object( process );
|
|
}
|
|
}
|
|
|
|
/* set information about a process */
|
|
DECL_HANDLER(set_process_info)
|
|
{
|
|
struct process *process;
|
|
|
|
if ((process = get_process_from_handle( req->handle, PROCESS_SET_INFORMATION )))
|
|
{
|
|
set_process_info( process, req );
|
|
release_object( process );
|
|
}
|
|
}
|
|
|
|
/* read data from a process address space */
|
|
DECL_HANDLER(read_process_memory)
|
|
{
|
|
struct process *process;
|
|
|
|
if ((process = get_process_from_handle( req->handle, PROCESS_VM_READ )))
|
|
{
|
|
read_process_memory( process, req->addr, req->len,
|
|
get_req_size( req->data, sizeof(int) ), req->data );
|
|
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 )))
|
|
{
|
|
write_process_memory( process, req->addr, req->len, get_req_size( req->data, sizeof(int) ),
|
|
req->first_mask, req->last_mask, req->data );
|
|
release_object( process );
|
|
}
|
|
}
|
|
|
|
/* notify the server that a dll has been loaded */
|
|
DECL_HANDLER(load_dll)
|
|
{
|
|
struct process_dll *dll;
|
|
struct file *file = NULL;
|
|
|
|
if ((req->handle != -1) &&
|
|
!(file = get_file_obj( current->process, req->handle, GENERIC_READ ))) return;
|
|
|
|
if ((dll = process_load_dll( current->process, file, req->base )))
|
|
{
|
|
dll->dbg_offset = req->dbg_offset;
|
|
dll->dbg_size = req->dbg_size;
|
|
dll->name = req->name;
|
|
/* only generate event if initialization is done */
|
|
if (!current->process->init_event)
|
|
generate_debug_event( current, LOAD_DLL_DEBUG_EVENT, dll );
|
|
}
|
|
if (file) release_object( file );
|
|
}
|
|
|
|
/* notify the server that a dll is being unloaded */
|
|
DECL_HANDLER(unload_dll)
|
|
{
|
|
process_unload_dll( current->process, req->base );
|
|
}
|