server/process.c

   1 /*
   2  * Server-side process management
   3  *
   4  * Copyright (C) 1998 Alexandre Julliard
   5  */
   6
   7 #include "config.h"
   8
   9 #include <assert.h>
  10 #include <errno.h>
  11 #include <limits.h>
  12 #include <signal.h>
  13 #include <string.h>
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <sys/time.h>
  17 #ifdef HAVE_SYS_SOCKET_H
  18 # include <sys/socket.h>
  19 #endif
  20 #include <unistd.h>
  21
  22 #include "winbase.h"
  23 #include "winnt.h"
  24
  25 #include "handle.h"
  26 #include "process.h"
  27 #include "thread.h"
  28 #include "request.h"
  29
  30 /* process structure */
  31
  32 static struct process *first_process;
  33 static int running_processes;
  34
  35 /* process operations */
  36
  37 static void process_dump( struct object *obj, int verbose );
  38 static int process_signaled( struct object *obj, struct thread *thread );
  39 static void process_destroy( struct object *obj );
  40
  41 static const struct object_ops process_ops =
  42 {
  43     sizeof(struct process),      /* size */
  44     process_dump,                /* dump */
  45     add_queue,                   /* add_queue */
  46     remove_queue,                /* remove_queue */
  47     process_signaled,            /* signaled */
  48     no_satisfied,                /* satisfied */
  49     NULL,                        /* get_poll_events */
  50     NULL,                        /* poll_event */
  51     no_read_fd,                  /* get_read_fd */
  52     no_write_fd,                 /* get_write_fd */
  53     no_flush,                    /* flush */
  54     no_get_file_info,            /* get_file_info */
  55     process_destroy              /* destroy */
  56 };
  57
  58 /* process startup info */
  59
  60 struct startup_info
  61 {
  62     struct object       obj;          /* object header */
  63     int                 inherit_all;  /* inherit all handles from parent */
  64     int                 create_flags; /* creation flags */
  65     int                 start_flags;  /* flags from startup info */
  66     int                 hstdin;       /* handle for stdin */
  67     int                 hstdout;      /* handle for stdout */
  68     int                 hstderr;      /* handle for stderr */
  69     int                 cmd_show;     /* main window show mode */
  70     struct file        *exe_file;     /* file handle for main exe */
  71     char               *filename;     /* file name for main exe */
  72     struct process     *process;      /* created process */
  73     struct thread      *thread;       /* created thread */
  74 };
  75
  76 static void startup_info_dump( struct object *obj, int verbose );
  77 static int startup_info_signaled( struct object *obj, struct thread *thread );
  78 static void startup_info_destroy( struct object *obj );
  79
  80 static const struct object_ops startup_info_ops =
  81 {
  82     sizeof(struct startup_info),   /* size */
  83     startup_info_dump,             /* dump */
  84     add_queue,                     /* add_queue */
  85     remove_queue,                  /* remove_queue */
  86     startup_info_signaled,         /* signaled */
  87     no_satisfied,                  /* satisfied */
  88     NULL,                          /* get_poll_events */
  89     NULL,                          /* poll_event */
  90     no_read_fd,                    /* get_read_fd */
  91     no_write_fd,                   /* get_write_fd */
  92     no_flush,                      /* flush */
  93     no_get_file_info,              /* get_file_info */
  94     startup_info_destroy           /* destroy */
  95 };
  96
  97
  98 /* set the console and stdio handles for a newly created process */
  99 static int set_process_console( struct process *process, struct process *parent,
 100                                 struct startup_info *info, struct init_process_request *req )
 101 {
 102     if (process->create_flags & CREATE_NEW_CONSOLE)
 103     {
 104         if (!alloc_console( process )) return 0;
 105     }
 106     else if (parent && !(process->create_flags & DETACHED_PROCESS))
 107     {
 108         if (parent->console_in) process->console_in = grab_object( parent->console_in );
 109         if (parent->console_out) process->console_out = grab_object( parent->console_out );
 110     }
 111     if (parent)
 112     {
 113         if (!info->inherit_all && !(info->start_flags & STARTF_USESTDHANDLES))
 114         {
 115             /* duplicate the handle from the parent into this process */
 116             req->hstdin  = duplicate_handle( parent, info->hstdin, process,
 117                                              0, TRUE, DUPLICATE_SAME_ACCESS );
 118             req->hstdout = duplicate_handle( parent, info->hstdout, process,
 119                                              0, TRUE, DUPLICATE_SAME_ACCESS );
 120             req->hstderr = duplicate_handle( parent, info->hstderr, process,
 121                                              0, TRUE, DUPLICATE_SAME_ACCESS );
 122         }
 123         else
 124         {
 125             req->hstdin  = info->hstdin;
 126             req->hstdout = info->hstdout;
 127             req->hstderr = info->hstderr;
 128         }
 129     }
 130     else
 131     {
 132         /* no parent, use handles to the console for stdio */
 133         req->hstdin  = alloc_handle( process, process->console_in,
 134                                      GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE, 1 );
 135         req->hstdout = alloc_handle( process, process->console_out,
 136                                      GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE, 1 );
 137         req->hstderr = alloc_handle( process, process->console_out,
 138                                      GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE, 1 );
 139     }
 140     /* some handles above may have been invalid; this is not an error */
 141     if (get_error() == STATUS_INVALID_HANDLE) clear_error();
 142     return 1;
 143 }
 144
 145 /* create a new process and its main thread */
 146 struct thread *create_process( int fd )
 147 {
 148     struct process *process;
 149     struct thread *thread = NULL;
 150
 151     if (!(process = alloc_object( &process_ops, -1 )))
 152     {
 153         close( fd );
 154         return NULL;
 155     }
 156     process->next            = NULL;
 157     process->prev            = NULL;
 158     process->thread_list     = NULL;
 159     process->debugger        = NULL;
 160     process->handles         = NULL;
 161     process->exit_code       = STILL_ACTIVE;
 162     process->running_threads = 0;
 163     process->priority        = NORMAL_PRIORITY_CLASS;
 164     process->affinity        = 1;
 165     process->suspend         = 0;
 166     process->create_flags    = 0;
 167     process->console_in      = NULL;
 168     process->console_out     = NULL;
 169     process->init_event      = NULL;
 170     process->idle_event      = NULL;
 171     process->queue           = NULL;
 172     process->atom_table      = NULL;
 173     process->ldt_copy        = NULL;
 174     process->exe.next        = NULL;
 175     process->exe.prev        = NULL;
 176     process->exe.file        = NULL;
 177     process->exe.dbg_offset  = 0;
 178     process->exe.dbg_size    = 0;
 179     gettimeofday( &process->start_time, NULL );
 180     if ((process->next = first_process) != NULL) process->next->prev = process;
 181     first_process = process;
 182
 183     /* create the main thread */
 184     if (!(thread = create_thread( fd, process ))) goto error;
 185
 186     /* create the init done event */
 187     if (!(process->init_event = create_event( NULL, 0, 1, 0 ))) goto error;
 188
 189     add_process_thread( process, thread );
 190     release_object( process );
 191     return thread;
 192
 193  error:
 194     if (thread) release_object( thread );
 195     release_object( process );
 196     return NULL;
 197 }
 198
 199 /* initialize the current process and fill in the request */
 200 static void init_process( int ppid, struct init_process_request *req )
 201 {
 202     struct process *process = current->process;
 203     struct thread *parent_thread = get_thread_from_pid( ppid );
 204     struct process *parent = NULL;
 205     struct startup_info *info = NULL;
 206
 207     if (parent_thread)
 208     {
 209         parent = parent_thread->process;
 210         info = parent_thread->info;
 211         if (!info)
 212         {
 213             fatal_protocol_error( current, "init_process: parent but no info\n" );
 214             return;
 215         }
 216         if (info->thread)
 217         {
 218             fatal_protocol_error( current, "init_process: called twice?\n" );
 219             return;
 220         }
 221     }
 222
 223     /* set the process flags */
 224     process->create_flags = info ? info->create_flags : CREATE_NEW_CONSOLE;
 225
 226     /* create the handle table */
 227     if (parent && info->inherit_all == 2)  /* HACK! */
 228         process->handles = grab_object( parent->handles );
 229     else if (parent && info->inherit_all)
 230         process->handles = copy_handle_table( process, parent );
 231     else
 232         process->handles = alloc_handle_table( process, 0 );
 233     if (!process->handles) goto error;
 234
 235     /* retrieve the main exe file */
 236     req->exe_file = -1;
 237     if (parent && info->exe_file)
 238     {
 239         process->exe.file = (struct file *)grab_object( info->exe_file );
 240         if ((req->exe_file = alloc_handle( process, process->exe.file, GENERIC_READ, 0 )) == -1)
 241             goto error;
 242     }
 243
 244     /* set the process console */
 245     if (!set_process_console( process, parent, info, req )) goto error;
 246
 247     if (parent)
 248     {
 249         /* attach to the debugger if requested */
 250         if (process->create_flags & (DEBUG_PROCESS | DEBUG_ONLY_THIS_PROCESS))
 251             set_process_debugger( process, parent_thread );
 252         else if (parent && parent->debugger && !(parent->create_flags & DEBUG_ONLY_THIS_PROCESS))
 253             set_process_debugger( process, parent->debugger );
 254     }
 255
 256     /* thread will be actually suspended in init_done */
 257     if (process->create_flags & CREATE_SUSPENDED) current->suspend++;
 258
 259     if (info)
 260     {
 261         size_t size = strlen(info->filename);
 262         if (size > get_req_data_size(req)) size = get_req_data_size(req);
 263         req->start_flags = info->start_flags;
 264         req->cmd_show    = info->cmd_show;
 265         memcpy( get_req_data(req), info->filename, size );
 266         set_req_data_size( req, size );
 267         info->process = (struct process *)grab_object( process );
 268         info->thread  = (struct thread *)grab_object( current );
 269         wake_up( &info->obj, 0 );
 270     }
 271     else
 272     {
 273         req->start_flags  = STARTF_USESTDHANDLES;
 274         req->cmd_show     = 0;
 275         set_req_data_size( req, 0 );
 276     }
 277     req->server_start = server_start_ticks;
 278  error:
 279 }
 280
 281 /* destroy a process when its refcount is 0 */
 282 static void process_destroy( struct object *obj )
 283 {
 284     struct process *process = (struct process *)obj;
 285     assert( obj->ops == &process_ops );
 286
 287     /* we can't have a thread remaining */
 288     assert( !process->thread_list );
 289     if (process->next) process->next->prev = process->prev;
 290     if (process->prev) process->prev->next = process->next;
 291     else first_process = process->next;
 292     if (process->init_event) release_object( process->init_event );
 293     if (process->idle_event) release_object( process->idle_event );
 294     if (process->queue) release_object( process->queue );
 295     if (process->atom_table) release_object( process->atom_table );
 296     if (process->exe.file) release_object( process->exe.file );
 297 }
 298
 299 /* dump a process on stdout for debugging purposes */
 300 static void process_dump( struct object *obj, int verbose )
 301 {
 302     struct process *process = (struct process *)obj;
 303     assert( obj->ops == &process_ops );
 304
 305     fprintf( stderr, "Process next=%p prev=%p console=%p/%p handles=%p\n",
 306              process->next, process->prev, process->console_in, process->console_out,
 307              process->handles );
 308 }
 309
 310 static int process_signaled( struct object *obj, struct thread *thread )
 311 {
 312     struct process *process = (struct process *)obj;
 313     return !process->running_threads;
 314 }
 315
 316
 317 static void startup_info_destroy( struct object *obj )
 318 {
 319     struct startup_info *info = (struct startup_info *)obj;
 320     assert( obj->ops == &startup_info_ops );
 321     if (info->filename) free( info->filename );
 322     if (info->exe_file) release_object( info->exe_file );
 323     if (info->process) release_object( info->process );
 324     if (info->thread) release_object( info->thread );
 325 }
 326
 327 static void startup_info_dump( struct object *obj, int verbose )
 328 {
 329     struct startup_info *info = (struct startup_info *)obj;
 330     assert( obj->ops == &startup_info_ops );
 331
 332     fprintf( stderr, "Startup info flags=%x in=%d out=%d err=%d name='%s'\n",
 333              info->start_flags, info->hstdin, info->hstdout, info->hstderr, info->filename );
 334 }
 335
 336 static int startup_info_signaled( struct object *obj, struct thread *thread )
 337 {
 338     struct startup_info *info = (struct startup_info *)obj;
 339     return (info->thread != NULL);
 340 }
 341
 342
 343 /* build a reply for the wait_process request */
 344 static void build_wait_process_reply( struct thread *thread, struct object *obj, int signaled )
 345 {
 346     struct wait_process_request *req = get_req_ptr( thread );
 347     if (obj)
 348     {
 349         struct startup_info *info = (struct startup_info *)obj;
 350         assert( obj->ops == &startup_info_ops );
 351
 352         req->pid = get_process_id( info->process );
 353         req->tid = get_thread_id( info->thread );
 354         req->phandle = alloc_handle( thread->process, info->process,
 355                                      PROCESS_ALL_ACCESS, req->pinherit );
 356         req->thandle = alloc_handle( thread->process, info->thread,
 357                                      THREAD_ALL_ACCESS, req->tinherit );
 358         if (info->process->init_event)
 359             req->event = alloc_handle( thread->process, info->process->init_event,
 360                                        EVENT_ALL_ACCESS, 0 );
 361         else
 362             req->event = -1;
 363
 364         /* FIXME: set_error */
 365     }
 366     release_object( thread->info );
 367     thread->info = NULL;
 368 }
 369
 370 /* get a process from an id (and increment the refcount) */
 371 struct process *get_process_from_id( void *id )
 372 {
 373     struct process *p = first_process;
 374     while (p && (p != id)) p = p->next;
 375     if (p) grab_object( p );
 376     else set_error( STATUS_INVALID_PARAMETER );
 377     return p;
 378 }
 379
 380 /* get a process from a handle (and increment the refcount) */
 381 struct process *get_process_from_handle( int handle, unsigned int access )
 382 {
 383     return (struct process *)get_handle_obj( current->process, handle,
 384                                              access, &process_ops );
 385 }
 386
 387 /* add a dll to a process list */
 388 static struct process_dll *process_load_dll( struct process *process, struct file *file,
 389                                              void *base )
 390 {
 391     struct process_dll *dll;
 392
 393     /* make sure we don't already have one with the same base address */
 394     for (dll = process->exe.next; dll; dll = dll->next) if (dll->base == base)
 395     {
 396         set_error( STATUS_INVALID_PARAMETER );
 397         return NULL;
 398     }
 399
 400     if ((dll = mem_alloc( sizeof(*dll) )))
 401     {
 402         dll->prev = &process->exe;
 403         dll->file = NULL;
 404         dll->base = base;
 405         if (file) dll->file = (struct file *)grab_object( file );
 406         if ((dll->next = process->exe.next)) dll->next->prev = dll;
 407         process->exe.next = dll;
 408     }
 409     return dll;
 410 }
 411
 412 /* remove a dll from a process list */
 413 static void process_unload_dll( struct process *process, void *base )
 414 {
 415     struct process_dll *dll;
 416
 417     for (dll = process->exe.next; dll; dll = dll->next)
 418     {
 419         if (dll->base == base)
 420         {
 421             if (dll->file) release_object( dll->file );
 422             if (dll->next) dll->next->prev = dll->prev;
 423             if (dll->prev) dll->prev->next = dll->next;
 424             free( dll );
 425             generate_debug_event( current, UNLOAD_DLL_DEBUG_EVENT, base );
 426             return;
 427         }
 428     }
 429     set_error( STATUS_INVALID_PARAMETER );
 430 }
 431
 432 /* a process has been killed (i.e. its last thread died) */
 433 static void process_killed( struct process *process )
 434 {
 435     assert( !process->thread_list );
 436     gettimeofday( &process->end_time, NULL );
 437     if (process->handles) release_object( process->handles );
 438     process->handles = NULL;
 439     free_console( process );
 440     while (process->exe.next)
 441     {
 442         struct process_dll *dll = process->exe.next;
 443         process->exe.next = dll->next;
 444         if (dll->file) release_object( dll->file );
 445         free( dll );
 446     }
 447     if (process->exe.file) release_object( process->exe.file );
 448     process->exe.file = NULL;
 449     wake_up( &process->obj, 0 );
 450     if (!--running_processes)
 451     {
 452         /* last process died, close global handles */
 453         close_global_handles();
 454         /* this will cause the select loop to terminate */
 455         if (!persistent_server) close_master_socket();
 456     }
 457 }
 458
 459 /* add a thread to a process running threads list */
 460 void add_process_thread( struct process *process, struct thread *thread )
 461 {
 462     thread->proc_next = process->thread_list;
 463     thread->proc_prev = NULL;
 464     if (thread->proc_next) thread->proc_next->proc_prev = thread;
 465     process->thread_list = thread;
 466     if (!process->running_threads++) running_processes++;
 467     grab_object( thread );
 468 }
 469
 470 /* remove a thread from a process running threads list */
 471 void remove_process_thread( struct process *process, struct thread *thread )
 472 {
 473     assert( process->running_threads > 0 );
 474     assert( process->thread_list );
 475
 476     if (thread->proc_next) thread->proc_next->proc_prev = thread->proc_prev;
 477     if (thread->proc_prev) thread->proc_prev->proc_next = thread->proc_next;
 478     else process->thread_list = thread->proc_next;
 479
 480     if (!--process->running_threads)
 481     {
 482         /* we have removed the last running thread, exit the process */
 483         process->exit_code = thread->exit_code;
 484         generate_debug_event( thread, EXIT_PROCESS_DEBUG_EVENT, process );
 485         process_killed( process );
 486     }
 487     else generate_debug_event( thread, EXIT_THREAD_DEBUG_EVENT, thread );
 488     release_object( thread );
 489 }
 490
 491 /* suspend all the threads of a process */
 492 void suspend_process( struct process *process )
 493 {
 494     if (!process->suspend++)
 495     {
 496         struct thread *thread = process->thread_list;
 497         for (; thread; thread = thread->proc_next)
 498         {
 499             if (!thread->suspend) stop_thread( thread );
 500         }
 501     }
 502 }
 503
 504 /* resume all the threads of a process */
 505 void resume_process( struct process *process )
 506 {
 507     assert (process->suspend > 0);
 508     if (!--process->suspend)
 509     {
 510         struct thread *thread = process->thread_list;
 511         for (; thread; thread = thread->proc_next)
 512         {
 513             if (!thread->suspend) continue_thread( thread );
 514         }
 515     }
 516 }
 517
 518 /* kill a process on the spot */
 519 static void kill_process( struct process *process, struct thread *skip, int exit_code )
 520 {
 521     struct thread *thread = process->thread_list;
 522     while (thread)
 523     {
 524         struct thread *next = thread->proc_next;
 525         thread->exit_code = exit_code;
 526         if (thread != skip) kill_thread( thread, 1 );
 527         thread = next;
 528     }
 529 }
 530
 531 /* kill all processes being debugged by a given thread */
 532 void kill_debugged_processes( struct thread *debugger, int exit_code )
 533 {
 534     for (;;)  /* restart from the beginning of the list every time */
 535     {
 536         struct process *process = first_process;
 537         /* find the first process being debugged by 'debugger' and still running */
 538         while (process && (process->debugger != debugger || !process->running_threads))
 539             process = process->next;
 540         if (!process) return;
 541         process->debugger = NULL;
 542         kill_process( process, NULL, exit_code );
 543     }
 544 }
 545
 546 /* get all information about a process */
 547 static void get_process_info( struct process *process, struct get_process_info_request *req )
 548 {
 549     req->pid              = process;
 550     req->debugged         = (process->debugger != 0);
 551     req->exit_code        = process->exit_code;
 552     req->priority         = process->priority;
 553     req->process_affinity = process->affinity;
 554     req->system_affinity  = 1;
 555 }
 556
 557 /* set all information about a process */
 558 static void set_process_info( struct process *process,
 559                               struct set_process_info_request *req )
 560 {
 561     if (req->mask & SET_PROCESS_INFO_PRIORITY)
 562         process->priority = req->priority;
 563     if (req->mask & SET_PROCESS_INFO_AFFINITY)
 564     {
 565         if (req->affinity != 1) set_error( STATUS_INVALID_PARAMETER );
 566         else process->affinity = req->affinity;
 567     }
 568 }
 569
 570 /* read data from a process memory space */
 571 /* len is the total size (in ints), max is the size we can actually store in the output buffer */
 572 /* we read the total size in all cases to check for permissions */
 573 static void read_process_memory( struct process *process, const int *addr,
 574                                  size_t len, size_t max, int *dest )
 575 {
 576     struct thread *thread = process->thread_list;
 577
 578     if ((unsigned int)addr % sizeof(int))  /* address must be aligned */
 579     {
 580         set_error( STATUS_INVALID_PARAMETER );
 581         return;
 582     }
 583     if (!thread)  /* process is dead */
 584     {
 585         set_error( STATUS_ACCESS_DENIED );
 586         return;
 587     }
 588     if (suspend_for_ptrace( thread ))
 589     {
 590         while (len > 0 && max)
 591         {
 592             if (read_thread_int( thread, addr++, dest++ ) == -1) goto done;
 593             max--;
 594             len--;
 595         }
 596         /* check the rest for read permission */
 597         if (len > 0)
 598         {
 599             int dummy, page = get_page_size() / sizeof(int);
 600             while (len >= page)
 601             {
 602                 addr += page;
 603                 len -= page;
 604                 if (read_thread_int( thread, addr - 1, &dummy ) == -1) goto done;
 605             }
 606             if (len && (read_thread_int( thread, addr + len - 1, &dummy ) == -1)) goto done;
 607         }
 608     done:
 609         resume_thread( thread );
 610     }
 611 }
 612
 613 /* write data to a process memory space */
 614 /* len is the total size (in ints), max is the size we can actually read from the input buffer */
 615 /* we check the total size for write permissions */
 616 static void write_process_memory( struct process *process, int *addr, size_t len,
 617                                   size_t max, unsigned int first_mask,
 618                                   unsigned int last_mask, const int *src )
 619 {
 620     struct thread *thread = process->thread_list;
 621
 622     if (!len || ((unsigned int)addr % sizeof(int)))  /* address must be aligned */
 623     {
 624         set_error( STATUS_INVALID_PARAMETER );
 625         return;
 626     }
 627     if (!thread)  /* process is dead */
 628     {
 629         set_error( STATUS_ACCESS_DENIED );
 630         return;
 631     }
 632     if (suspend_for_ptrace( thread ))
 633     {
 634         /* first word is special */
 635         if (len > 1)
 636         {
 637             if (write_thread_int( thread, addr++, *src++, first_mask ) == -1) goto done;
 638             len--;
 639             max--;
 640         }
 641         else last_mask &= first_mask;
 642
 643         while (len > 1 && max)
 644         {
 645             if (write_thread_int( thread, addr++, *src++, ~0 ) == -1) goto done;
 646             max--;
 647             len--;
 648         }
 649
 650         if (max)
 651         {
 652             /* last word is special too */
 653             if (write_thread_int( thread, addr, *src, last_mask ) == -1) goto done;
 654         }
 655         else
 656         {
 657             /* check the rest for write permission */
 658             int page = get_page_size() / sizeof(int);
 659             while (len >= page)
 660             {
 661                 addr += page;
 662                 len -= page;
 663                 if (write_thread_int( thread, addr - 1, 0, 0 ) == -1) goto done;
 664             }
 665             if (len && (write_thread_int( thread, addr + len - 1, 0, 0 ) == -1)) goto done;
 666         }
 667     done:
 668         resume_thread( thread );
 669     }
 670 }
 671
 672 /* take a snapshot of currently running processes */
 673 struct process_snapshot *process_snap( int *count )
 674 {
 675     struct process_snapshot *snapshot, *ptr;
 676     struct process *process;
 677     if (!running_processes) return NULL;
 678     if (!(snapshot = mem_alloc( sizeof(*snapshot) * running_processes )))
 679         return NULL;
 680     ptr = snapshot;
 681     for (process = first_process; process; process = process->next)
 682     {
 683         if (!process->running_threads) continue;
 684         ptr->process  = process;
 685         ptr->threads  = process->running_threads;
 686         ptr->count    = process->obj.refcount;
 687         ptr->priority = process->priority;
 688         grab_object( process );
 689         ptr++;
 690     }
 691     *count = running_processes;
 692     return snapshot;
 693 }
 694
 695 /* take a snapshot of the modules of a process */
 696 struct module_snapshot *module_snap( struct process *process, int *count )
 697 {
 698     struct module_snapshot *snapshot, *ptr;
 699     struct process_dll *dll;
 700     int total = 0;
 701
 702     for (dll = &process->exe; dll; dll = dll->next) total++;
 703     if (!(snapshot = mem_alloc( sizeof(*snapshot) * total ))) return NULL;
 704
 705     for (ptr = snapshot, dll = &process->exe; dll; dll = dll->next, ptr++)
 706     {
 707         ptr->base = dll->base;
 708     }
 709     *count = total;
 710     return snapshot;
 711 }
 712
 713
 714 /* create a new process */
 715 DECL_HANDLER(new_process)
 716 {
 717     size_t len = get_req_data_size( req );
 718     struct startup_info *info;
 719     int sock[2];
 720
 721     if (current->info)
 722     {
 723         fatal_protocol_error( current, "new_process: another process is being created\n" );
 724         return;
 725     }
 726
 727     /* build the startup info for a new process */
 728     if (!(info = alloc_object( &startup_info_ops, -1 ))) return;
 729     info->inherit_all  = req->inherit_all;
 730     info->create_flags = req->create_flags;
 731     info->start_flags  = req->start_flags;
 732     info->hstdin       = req->hstdin;
 733     info->hstdout      = req->hstdout;
 734     info->hstderr      = req->hstderr;
 735     info->cmd_show     = req->cmd_show;
 736     info->exe_file     = NULL;
 737     info->filename     = NULL;
 738     info->process      = NULL;
 739     info->thread       = NULL;
 740
 741     if ((req->exe_file != -1) &&
 742         !(info->exe_file = get_file_obj( current->process, req->exe_file, GENERIC_READ )))
 743     {
 744         release_object( info );
 745         return;
 746     }
 747
 748     if (!(info->filename = mem_alloc( len + 1 )))
 749     {
 750         release_object( info );
 751         return;
 752     }
 753     memcpy( info->filename, get_req_data(req), len );
 754     info->filename[len] = 0;
 755
 756     if (req->alloc_fd)
 757     {
 758         if (socketpair( AF_UNIX, SOCK_STREAM, 0, sock ) == -1)
 759         {
 760             file_set_error();
 761             release_object( info );
 762             return;
 763         }
 764         if (!create_process( sock[0] ))
 765         {
 766             release_object( info );
 767             close( sock[1] );
 768             return;
 769         }
 770         /* thread object will be released when the thread gets killed */
 771         set_reply_fd( current, sock[1] );
 772     }
 773     current->info = info;
 774 }
 775
 776 /* Wait for the new process to start */
 777 DECL_HANDLER(wait_process)
 778 {
 779     if (!current->info)
 780     {
 781         fatal_protocol_error( current, "wait_process: no process is being created\n" );
 782         return;
 783     }
 784     req->pid     = 0;
 785     req->tid     = 0;
 786     req->phandle = -1;
 787     req->thandle = -1;
 788     req->event   = -1;
 789     if (req->cancel)
 790     {
 791         release_object( current->info );
 792         current->info = NULL;
 793     }
 794     else
 795     {
 796         struct object *obj = &current->info->obj;
 797         sleep_on( 1, &obj, SELECT_TIMEOUT, req->timeout, build_wait_process_reply );
 798     }
 799 }
 800
 801 /* initialize a new process */
 802 DECL_HANDLER(init_process)
 803 {
 804     if (!current->unix_pid)
 805     {
 806         fatal_protocol_error( current, "init_process: init_thread not called yet\n" );
 807         return;
 808     }
 809     current->process->ldt_copy  = req->ldt_copy;
 810     init_process( req->ppid, req );
 811 }
 812
 813 /* signal the end of the process initialization */
 814 DECL_HANDLER(init_process_done)
 815 {
 816     struct process *process = current->process;
 817     if (!process->init_event)
 818     {
 819         fatal_protocol_error( current, "init_process_done: no event\n" );
 820         return;
 821     }
 822     process->exe.base = req->module;
 823     process->exe.name = req->name;
 824     generate_startup_debug_events( current->process, req->entry );
 825     set_event( process->init_event );
 826     release_object( process->init_event );
 827     process->init_event = NULL;
 828     if (req->gui) process->idle_event = create_event( NULL, 0, 1, 0 );
 829     if (current->suspend + current->process->suspend > 0) stop_thread( current );
 830     req->debugged = (current->process->debugger != 0);
 831 }
 832
 833 /* open a handle to a process */
 834 DECL_HANDLER(open_process)
 835 {
 836     struct process *process = get_process_from_id( req->pid );
 837     req->handle = -1;
 838     if (process)
 839     {
 840         req->handle = alloc_handle( current->process, process, req->access, req->inherit );
 841         release_object( process );
 842     }
 843 }
 844
 845 /* terminate a process */
 846 DECL_HANDLER(terminate_process)
 847 {
 848     struct process *process;
 849
 850     if ((process = get_process_from_handle( req->handle, PROCESS_TERMINATE )))
 851     {
 852         req->self = (current->process == process);
 853         kill_process( process, current, req->exit_code );
 854         release_object( process );
 855     }
 856 }
 857
 858 /* fetch information about a process */
 859 DECL_HANDLER(get_process_info)
 860 {
 861     struct process *process;
 862
 863     if ((process = get_process_from_handle( req->handle, PROCESS_QUERY_INFORMATION )))
 864     {
 865         get_process_info( process, req );
 866         release_object( process );
 867     }
 868 }
 869
 870 /* set information about a process */
 871 DECL_HANDLER(set_process_info)
 872 {
 873     struct process *process;
 874
 875     if ((process = get_process_from_handle( req->handle, PROCESS_SET_INFORMATION )))
 876     {
 877         set_process_info( process, req );
 878         release_object( process );
 879     }
 880 }
 881
 882 /* read data from a process address space */
 883 DECL_HANDLER(read_process_memory)
 884 {
 885     struct process *process;
 886
 887     if ((process = get_process_from_handle( req->handle, PROCESS_VM_READ )))
 888     {
 889         size_t maxlen = get_req_data_size(req) / sizeof(int);
 890         read_process_memory( process, req->addr, req->len, maxlen, get_req_data(req) );
 891         release_object( process );
 892     }
 893 }
 894
 895 /* write data to a process address space */
 896 DECL_HANDLER(write_process_memory)
 897 {
 898     struct process *process;
 899
 900     if ((process = get_process_from_handle( req->handle, PROCESS_VM_WRITE )))
 901     {
 902         size_t maxlen = get_req_data_size(req) / sizeof(int);
 903         write_process_memory( process, req->addr, req->len, maxlen,
 904                               req->first_mask, req->last_mask, get_req_data(req) );
 905         release_object( process );
 906     }
 907 }
 908
 909 /* notify the server that a dll has been loaded */
 910 DECL_HANDLER(load_dll)
 911 {
 912     struct process_dll *dll;
 913     struct file *file = NULL;
 914
 915     if ((req->handle != -1) &&
 916         !(file = get_file_obj( current->process, req->handle, GENERIC_READ ))) return;
 917
 918     if ((dll = process_load_dll( current->process, file, req->base )))
 919     {
 920         dll->dbg_offset = req->dbg_offset;
 921         dll->dbg_size   = req->dbg_size;
 922         dll->name       = req->name;
 923         /* only generate event if initialization is done */
 924         if (!current->process->init_event)
 925             generate_debug_event( current, LOAD_DLL_DEBUG_EVENT, dll );
 926     }
 927     if (file) release_object( file );
 928 }
 929
 930 /* notify the server that a dll is being unloaded */
 931 DECL_HANDLER(unload_dll)
 932 {
 933     process_unload_dll( current->process, req->base );
 934 }
 935
 936 /* wait for a process to start waiting on input */
 937 /* FIXME: only returns event for now, wait is done in the client */
 938 DECL_HANDLER(wait_input_idle)
 939 {
 940     struct process *process;
 941
 942     req->event = -1;
 943     if ((process = get_process_from_handle( req->handle, PROCESS_QUERY_INFORMATION )))
 944     {
 945         if (process->idle_event && process != current->process && process->queue != current->queue)
 946             req->event = alloc_handle( current->process, process->idle_event,
 947                                        EVENT_ALL_ACCESS, 0 );
 948         release_object( process );
 949     }
 950 }