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->ldt_flags       = NULL;
 175     process->exe.next        = NULL;
 176     process->exe.prev        = NULL;
 177     process->exe.file        = NULL;
 178     process->exe.dbg_offset  = 0;
 179     process->exe.dbg_size    = 0;
 180     gettimeofday( &process->start_time, NULL );
 181     if ((process->next = first_process) != NULL) process->next->prev = process;
 182     first_process = process;
 183
 184     /* create the main thread */
 185     if (!(thread = create_thread( fd, process ))) goto error;
 186
 187     /* create the init done event */
 188     if (!(process->init_event = create_event( NULL, 0, 1, 0 ))) goto error;
 189
 190     add_process_thread( process, thread );
 191     release_object( process );
 192     return thread;
 193
 194  error:
 195     if (thread) release_object( thread );
 196     release_object( process );
 197     return NULL;
 198 }
 199
 200 /* initialize the current process and fill in the request */
 201 static void init_process( int ppid, struct init_process_request *req )
 202 {
 203     struct process *process = current->process;
 204     struct thread *parent_thread = get_thread_from_pid( ppid );
 205     struct process *parent = NULL;
 206     struct startup_info *info = NULL;
 207
 208     if (parent_thread)
 209     {
 210         parent = parent_thread->process;
 211         info = parent_thread->info;
 212         if (!info)
 213         {
 214             fatal_protocol_error( current, "init_process: parent but no info\n" );
 215             return;
 216         }
 217         if (info->thread)
 218         {
 219             fatal_protocol_error( current, "init_process: called twice?\n" );
 220             return;
 221         }
 222     }
 223
 224     /* set the process flags */
 225     process->create_flags = info ? info->create_flags : CREATE_NEW_CONSOLE;
 226
 227     /* create the handle table */
 228     if (parent && info->inherit_all == 2)  /* HACK! */
 229         process->handles = grab_object( parent->handles );
 230     else if (parent && info->inherit_all)
 231         process->handles = copy_handle_table( process, parent );
 232     else
 233         process->handles = alloc_handle_table( process, 0 );
 234     if (!process->handles) goto error;
 235
 236     /* retrieve the main exe file */
 237     req->exe_file = -1;
 238     if (parent && info->exe_file)
 239     {
 240         process->exe.file = (struct file *)grab_object( info->exe_file );
 241         if ((req->exe_file = alloc_handle( process, process->exe.file, GENERIC_READ, 0 )) == -1)
 242             goto error;
 243     }
 244
 245     /* set the process console */
 246     if (!set_process_console( process, parent, info, req )) goto error;
 247
 248     if (parent)
 249     {
 250         /* attach to the debugger if requested */
 251         if (process->create_flags & (DEBUG_PROCESS | DEBUG_ONLY_THIS_PROCESS))
 252             set_process_debugger( process, parent_thread );
 253         else if (parent && parent->debugger && !(parent->create_flags & DEBUG_ONLY_THIS_PROCESS))
 254             set_process_debugger( process, parent->debugger );
 255     }
 256
 257     /* thread will be actually suspended in init_done */
 258     if (process->create_flags & CREATE_SUSPENDED) current->suspend++;
 259
 260     if (info)
 261     {
 262         size_t size = strlen(info->filename);
 263         if (size > get_req_data_size(req)) size = get_req_data_size(req);
 264         req->start_flags = info->start_flags;
 265         req->cmd_show    = info->cmd_show;
 266         memcpy( get_req_data(req), info->filename, size );
 267         set_req_data_size( req, size );
 268         info->process = (struct process *)grab_object( process );
 269         info->thread  = (struct thread *)grab_object( current );
 270         wake_up( &info->obj, 0 );
 271     }
 272     else
 273     {
 274         req->start_flags  = STARTF_USESTDHANDLES;
 275         req->cmd_show     = 0;
 276         set_req_data_size( req, 0 );
 277     }
 278     req->server_start = server_start_ticks;
 279  error:
 280 }
 281
 282 /* destroy a process when its refcount is 0 */
 283 static void process_destroy( struct object *obj )
 284 {
 285     struct process *process = (struct process *)obj;
 286     assert( obj->ops == &process_ops );
 287
 288     /* we can't have a thread remaining */
 289     assert( !process->thread_list );
 290     if (process->next) process->next->prev = process->prev;
 291     if (process->prev) process->prev->next = process->next;
 292     else first_process = process->next;
 293     if (process->init_event) release_object( process->init_event );
 294     if (process->idle_event) release_object( process->idle_event );
 295     if (process->queue) release_object( process->queue );
 296     if (process->atom_table) release_object( process->atom_table );
 297     if (process->exe.file) release_object( process->exe.file );
 298 }
 299
 300 /* dump a process on stdout for debugging purposes */
 301 static void process_dump( struct object *obj, int verbose )
 302 {
 303     struct process *process = (struct process *)obj;
 304     assert( obj->ops == &process_ops );
 305
 306     fprintf( stderr, "Process next=%p prev=%p console=%p/%p handles=%p\n",
 307              process->next, process->prev, process->console_in, process->console_out,
 308              process->handles );
 309 }
 310
 311 static int process_signaled( struct object *obj, struct thread *thread )
 312 {
 313     struct process *process = (struct process *)obj;
 314     return !process->running_threads;
 315 }
 316
 317
 318 static void startup_info_destroy( struct object *obj )
 319 {
 320     struct startup_info *info = (struct startup_info *)obj;
 321     assert( obj->ops == &startup_info_ops );
 322     if (info->filename) free( info->filename );
 323     if (info->exe_file) release_object( info->exe_file );
 324     if (info->process) release_object( info->process );
 325     if (info->thread) release_object( info->thread );
 326 }
 327
 328 static void startup_info_dump( struct object *obj, int verbose )
 329 {
 330     struct startup_info *info = (struct startup_info *)obj;
 331     assert( obj->ops == &startup_info_ops );
 332
 333     fprintf( stderr, "Startup info flags=%x in=%d out=%d err=%d name='%s'\n",
 334              info->start_flags, info->hstdin, info->hstdout, info->hstderr, info->filename );
 335 }
 336
 337 static int startup_info_signaled( struct object *obj, struct thread *thread )
 338 {
 339     struct startup_info *info = (struct startup_info *)obj;
 340     return (info->thread != NULL);
 341 }
 342
 343
 344 /* build a reply for the wait_process request */
 345 static void build_wait_process_reply( struct thread *thread, struct object *obj, int signaled )
 346 {
 347     struct wait_process_request *req = get_req_ptr( thread );
 348     if (obj)
 349     {
 350         struct startup_info *info = (struct startup_info *)obj;
 351         assert( obj->ops == &startup_info_ops );
 352
 353         req->pid = get_process_id( info->process );
 354         req->tid = get_thread_id( info->thread );
 355         req->phandle = alloc_handle( thread->process, info->process,
 356                                      PROCESS_ALL_ACCESS, req->pinherit );
 357         req->thandle = alloc_handle( thread->process, info->thread,
 358                                      THREAD_ALL_ACCESS, req->tinherit );
 359         if (info->process->init_event)
 360             req->event = alloc_handle( thread->process, info->process->init_event,
 361                                        EVENT_ALL_ACCESS, 0 );
 362         else
 363             req->event = -1;
 364
 365         /* FIXME: set_error */
 366     }
 367     release_object( thread->info );
 368     thread->info = NULL;
 369 }
 370
 371 /* get a process from an id (and increment the refcount) */
 372 struct process *get_process_from_id( void *id )
 373 {
 374     struct process *p = first_process;
 375     while (p && (p != id)) p = p->next;
 376     if (p) grab_object( p );
 377     else set_error( STATUS_INVALID_PARAMETER );
 378     return p;
 379 }
 380
 381 /* get a process from a handle (and increment the refcount) */
 382 struct process *get_process_from_handle( int handle, unsigned int access )
 383 {
 384     return (struct process *)get_handle_obj( current->process, handle,
 385                                              access, &process_ops );
 386 }
 387
 388 /* add a dll to a process list */
 389 static struct process_dll *process_load_dll( struct process *process, struct file *file,
 390                                              void *base )
 391 {
 392     struct process_dll *dll;
 393
 394     /* make sure we don't already have one with the same base address */
 395     for (dll = process->exe.next; dll; dll = dll->next) if (dll->base == base)
 396     {
 397         set_error( STATUS_INVALID_PARAMETER );
 398         return NULL;
 399     }
 400
 401     if ((dll = mem_alloc( sizeof(*dll) )))
 402     {
 403         dll->prev = &process->exe;
 404         dll->file = NULL;
 405         dll->base = base;
 406         if (file) dll->file = (struct file *)grab_object( file );
 407         if ((dll->next = process->exe.next)) dll->next->prev = dll;
 408         process->exe.next = dll;
 409     }
 410     return dll;
 411 }
 412
 413 /* remove a dll from a process list */
 414 static void process_unload_dll( struct process *process, void *base )
 415 {
 416     struct process_dll *dll;
 417
 418     for (dll = process->exe.next; dll; dll = dll->next)
 419     {
 420         if (dll->base == base)
 421         {
 422             if (dll->file) release_object( dll->file );
 423             if (dll->next) dll->next->prev = dll->prev;
 424             if (dll->prev) dll->prev->next = dll->next;
 425             free( dll );
 426             generate_debug_event( current, UNLOAD_DLL_DEBUG_EVENT, base );
 427             return;
 428         }
 429     }
 430     set_error( STATUS_INVALID_PARAMETER );
 431 }
 432
 433 /* a process has been killed (i.e. its last thread died) */
 434 static void process_killed( struct process *process )
 435 {
 436     assert( !process->thread_list );
 437     gettimeofday( &process->end_time, NULL );
 438     if (process->handles) release_object( process->handles );
 439     process->handles = NULL;
 440     free_console( process );
 441     while (process->exe.next)
 442     {
 443         struct process_dll *dll = process->exe.next;
 444         process->exe.next = dll->next;
 445         if (dll->file) release_object( dll->file );
 446         free( dll );
 447     }
 448     if (process->exe.file) release_object( process->exe.file );
 449     process->exe.file = NULL;
 450     wake_up( &process->obj, 0 );
 451     if (!--running_processes)
 452     {
 453         /* last process died, close global handles */
 454         close_global_handles();
 455         /* this will cause the select loop to terminate */
 456         if (!persistent_server) close_master_socket();
 457     }
 458 }
 459
 460 /* add a thread to a process running threads list */
 461 void add_process_thread( struct process *process, struct thread *thread )
 462 {
 463     thread->proc_next = process->thread_list;
 464     thread->proc_prev = NULL;
 465     if (thread->proc_next) thread->proc_next->proc_prev = thread;
 466     process->thread_list = thread;
 467     if (!process->running_threads++) running_processes++;
 468     grab_object( thread );
 469 }
 470
 471 /* remove a thread from a process running threads list */
 472 void remove_process_thread( struct process *process, struct thread *thread )
 473 {
 474     assert( process->running_threads > 0 );
 475     assert( process->thread_list );
 476
 477     if (thread->proc_next) thread->proc_next->proc_prev = thread->proc_prev;
 478     if (thread->proc_prev) thread->proc_prev->proc_next = thread->proc_next;
 479     else process->thread_list = thread->proc_next;
 480
 481     if (!--process->running_threads)
 482     {
 483         /* we have removed the last running thread, exit the process */
 484         process->exit_code = thread->exit_code;
 485         generate_debug_event( thread, EXIT_PROCESS_DEBUG_EVENT, process );
 486         process_killed( process );
 487     }
 488     else generate_debug_event( thread, EXIT_THREAD_DEBUG_EVENT, thread );
 489     release_object( thread );
 490 }
 491
 492 /* suspend all the threads of a process */
 493 void suspend_process( struct process *process )
 494 {
 495     if (!process->suspend++)
 496     {
 497         struct thread *thread = process->thread_list;
 498         for (; thread; thread = thread->proc_next)
 499         {
 500             if (!thread->suspend) stop_thread( thread );
 501         }
 502     }
 503 }
 504
 505 /* resume all the threads of a process */
 506 void resume_process( struct process *process )
 507 {
 508     assert (process->suspend > 0);
 509     if (!--process->suspend)
 510     {
 511         struct thread *thread = process->thread_list;
 512         for (; thread; thread = thread->proc_next)
 513         {
 514             if (!thread->suspend) continue_thread( thread );
 515         }
 516     }
 517 }
 518
 519 /* kill a process on the spot */
 520 static void kill_process( struct process *process, struct thread *skip, int exit_code )
 521 {
 522     struct thread *thread = process->thread_list;
 523     while (thread)
 524     {
 525         struct thread *next = thread->proc_next;
 526         thread->exit_code = exit_code;
 527         if (thread != skip) kill_thread( thread, 1 );
 528         thread = next;
 529     }
 530 }
 531
 532 /* kill all processes being debugged by a given thread */
 533 void kill_debugged_processes( struct thread *debugger, int exit_code )
 534 {
 535     for (;;)  /* restart from the beginning of the list every time */
 536     {
 537         struct process *process = first_process;
 538         /* find the first process being debugged by 'debugger' and still running */
 539         while (process && (process->debugger != debugger || !process->running_threads))
 540             process = process->next;
 541         if (!process) return;
 542         process->debugger = NULL;
 543         kill_process( process, NULL, exit_code );
 544     }
 545 }
 546
 547 /* get all information about a process */
 548 static void get_process_info( struct process *process, struct get_process_info_request *req )
 549 {
 550     req->pid              = process;
 551     req->debugged         = (process->debugger != 0);
 552     req->exit_code        = process->exit_code;
 553     req->priority         = process->priority;
 554     req->process_affinity = process->affinity;
 555     req->system_affinity  = 1;
 556 }
 557
 558 /* set all information about a process */
 559 static void set_process_info( struct process *process,
 560                               struct set_process_info_request *req )
 561 {
 562     if (req->mask & SET_PROCESS_INFO_PRIORITY)
 563         process->priority = req->priority;
 564     if (req->mask & SET_PROCESS_INFO_AFFINITY)
 565     {
 566         if (req->affinity != 1) set_error( STATUS_INVALID_PARAMETER );
 567         else process->affinity = req->affinity;
 568     }
 569 }
 570
 571 /* read data from a process memory space */
 572 /* len is the total size (in ints), max is the size we can actually store in the output buffer */
 573 /* we read the total size in all cases to check for permissions */
 574 static void read_process_memory( struct process *process, const int *addr,
 575                                  size_t len, size_t max, int *dest )
 576 {
 577     struct thread *thread = process->thread_list;
 578
 579     if ((unsigned int)addr % sizeof(int))  /* address must be aligned */
 580     {
 581         set_error( STATUS_INVALID_PARAMETER );
 582         return;
 583     }
 584     if (!thread)  /* process is dead */
 585     {
 586         set_error( STATUS_ACCESS_DENIED );
 587         return;
 588     }
 589     if (suspend_for_ptrace( thread ))
 590     {
 591         while (len > 0 && max)
 592         {
 593             if (read_thread_int( thread, addr++, dest++ ) == -1) goto done;
 594             max--;
 595             len--;
 596         }
 597         /* check the rest for read permission */
 598         if (len > 0)
 599         {
 600             int dummy, page = get_page_size() / sizeof(int);
 601             while (len >= page)
 602             {
 603                 addr += page;
 604                 len -= page;
 605                 if (read_thread_int( thread, addr - 1, &dummy ) == -1) goto done;
 606             }
 607             if (len && (read_thread_int( thread, addr + len - 1, &dummy ) == -1)) goto done;
 608         }
 609     done:
 610         resume_thread( thread );
 611     }
 612 }
 613
 614 /* write data to a process memory space */
 615 /* len is the total size (in ints), max is the size we can actually read from the input buffer */
 616 /* we check the total size for write permissions */
 617 static void write_process_memory( struct process *process, int *addr, size_t len,
 618                                   size_t max, unsigned int first_mask,
 619                                   unsigned int last_mask, const int *src )
 620 {
 621     struct thread *thread = process->thread_list;
 622
 623     if (!len || ((unsigned int)addr % sizeof(int)))  /* address must be aligned */
 624     {
 625         set_error( STATUS_INVALID_PARAMETER );
 626         return;
 627     }
 628     if (!thread)  /* process is dead */
 629     {
 630         set_error( STATUS_ACCESS_DENIED );
 631         return;
 632     }
 633     if (suspend_for_ptrace( thread ))
 634     {
 635         /* first word is special */
 636         if (len > 1)
 637         {
 638             if (write_thread_int( thread, addr++, *src++, first_mask ) == -1) goto done;
 639             len--;
 640             max--;
 641         }
 642         else last_mask &= first_mask;
 643
 644         while (len > 1 && max)
 645         {
 646             if (write_thread_int( thread, addr++, *src++, ~0 ) == -1) goto done;
 647             max--;
 648             len--;
 649         }
 650
 651         if (max)
 652         {
 653             /* last word is special too */
 654             if (write_thread_int( thread, addr, *src, last_mask ) == -1) goto done;
 655         }
 656         else
 657         {
 658             /* check the rest for write permission */
 659             int page = get_page_size() / sizeof(int);
 660             while (len >= page)
 661             {
 662                 addr += page;
 663                 len -= page;
 664                 if (write_thread_int( thread, addr - 1, 0, 0 ) == -1) goto done;
 665             }
 666             if (len && (write_thread_int( thread, addr + len - 1, 0, 0 ) == -1)) goto done;
 667         }
 668     done:
 669         resume_thread( thread );
 670     }
 671 }
 672
 673 /* take a snapshot of currently running processes */
 674 struct process_snapshot *process_snap( int *count )
 675 {
 676     struct process_snapshot *snapshot, *ptr;
 677     struct process *process;
 678     if (!running_processes) return NULL;
 679     if (!(snapshot = mem_alloc( sizeof(*snapshot) * running_processes )))
 680         return NULL;
 681     ptr = snapshot;
 682     for (process = first_process; process; process = process->next)
 683     {
 684         if (!process->running_threads) continue;
 685         ptr->process  = process;
 686         ptr->threads  = process->running_threads;
 687         ptr->count    = process->obj.refcount;
 688         ptr->priority = process->priority;
 689         grab_object( process );
 690         ptr++;
 691     }
 692     *count = running_processes;
 693     return snapshot;
 694 }
 695
 696 /* take a snapshot of the modules of a process */
 697 struct module_snapshot *module_snap( struct process *process, int *count )
 698 {
 699     struct module_snapshot *snapshot, *ptr;
 700     struct process_dll *dll;
 701     int total = 0;
 702
 703     for (dll = &process->exe; dll; dll = dll->next) total++;
 704     if (!(snapshot = mem_alloc( sizeof(*snapshot) * total ))) return NULL;
 705
 706     for (ptr = snapshot, dll = &process->exe; dll; dll = dll->next, ptr++)
 707     {
 708         ptr->base = dll->base;
 709     }
 710     *count = total;
 711     return snapshot;
 712 }
 713
 714
 715 /* create a new process */
 716 DECL_HANDLER(new_process)
 717 {
 718     size_t len = get_req_data_size( req );
 719     struct startup_info *info;
 720     int sock[2];
 721
 722     if (current->info)
 723     {
 724         fatal_protocol_error( current, "new_process: another process is being created\n" );
 725         return;
 726     }
 727
 728     /* build the startup info for a new process */
 729     if (!(info = alloc_object( &startup_info_ops, -1 ))) return;
 730     info->inherit_all  = req->inherit_all;
 731     info->create_flags = req->create_flags;
 732     info->start_flags  = req->start_flags;
 733     info->hstdin       = req->hstdin;
 734     info->hstdout      = req->hstdout;
 735     info->hstderr      = req->hstderr;
 736     info->cmd_show     = req->cmd_show;
 737     info->exe_file     = NULL;
 738     info->filename     = NULL;
 739     info->process      = NULL;
 740     info->thread       = NULL;
 741
 742     if ((req->exe_file != -1) &&
 743         !(info->exe_file = get_file_obj( current->process, req->exe_file, GENERIC_READ )))
 744     {
 745         release_object( info );
 746         return;
 747     }
 748
 749     if (!(info->filename = mem_alloc( len + 1 )))
 750     {
 751         release_object( info );
 752         return;
 753     }
 754     memcpy( info->filename, get_req_data(req), len );
 755     info->filename[len] = 0;
 756
 757     if (req->alloc_fd)
 758     {
 759         if (socketpair( AF_UNIX, SOCK_STREAM, 0, sock ) == -1)
 760         {
 761             file_set_error();
 762             release_object( info );
 763             return;
 764         }
 765         if (!create_process( sock[0] ))
 766         {
 767             release_object( info );
 768             close( sock[1] );
 769             return;
 770         }
 771         /* thread object will be released when the thread gets killed */
 772         set_reply_fd( current, sock[1] );
 773     }
 774     current->info = info;
 775 }
 776
 777 /* Wait for the new process to start */
 778 DECL_HANDLER(wait_process)
 779 {
 780     if (!current->info)
 781     {
 782         fatal_protocol_error( current, "wait_process: no process is being created\n" );
 783         return;
 784     }
 785     req->pid     = 0;
 786     req->tid     = 0;
 787     req->phandle = -1;
 788     req->thandle = -1;
 789     req->event   = -1;
 790     if (req->cancel)
 791     {
 792         release_object( current->info );
 793         current->info = NULL;
 794     }
 795     else
 796     {
 797         struct object *obj = &current->info->obj;
 798         sleep_on( 1, &obj, SELECT_TIMEOUT, req->timeout, build_wait_process_reply );
 799     }
 800 }
 801
 802 /* initialize a new process */
 803 DECL_HANDLER(init_process)
 804 {
 805     if (!current->unix_pid)
 806     {
 807         fatal_protocol_error( current, "init_process: init_thread not called yet\n" );
 808         return;
 809     }
 810     current->process->ldt_copy  = req->ldt_copy;
 811     current->process->ldt_flags = req->ldt_flags;
 812     init_process( req->ppid, req );
 813 }
 814
 815 /* signal the end of the process initialization */
 816 DECL_HANDLER(init_process_done)
 817 {
 818     struct process *process = current->process;
 819     if (!process->init_event)
 820     {
 821         fatal_protocol_error( current, "init_process_done: no event\n" );
 822         return;
 823     }
 824     process->exe.base = req->module;
 825     process->exe.name = req->name;
 826     generate_startup_debug_events( current->process, req->entry );
 827     set_event( process->init_event );
 828     release_object( process->init_event );
 829     process->init_event = NULL;
 830     if (req->gui) process->idle_event = create_event( NULL, 0, 1, 0 );
 831     if (current->suspend + current->process->suspend > 0) stop_thread( current );
 832     req->debugged = (current->process->debugger != 0);
 833 }
 834
 835 /* open a handle to a process */
 836 DECL_HANDLER(open_process)
 837 {
 838     struct process *process = get_process_from_id( req->pid );
 839     req->handle = -1;
 840     if (process)
 841     {
 842         req->handle = alloc_handle( current->process, process, req->access, req->inherit );
 843         release_object( process );
 844     }
 845 }
 846
 847 /* terminate a process */
 848 DECL_HANDLER(terminate_process)
 849 {
 850     struct process *process;
 851
 852     if ((process = get_process_from_handle( req->handle, PROCESS_TERMINATE )))
 853     {
 854         req->self = (current->process == process);
 855         kill_process( process, current, req->exit_code );
 856         release_object( process );
 857     }
 858 }
 859
 860 /* fetch information about a process */
 861 DECL_HANDLER(get_process_info)
 862 {
 863     struct process *process;
 864
 865     if ((process = get_process_from_handle( req->handle, PROCESS_QUERY_INFORMATION )))
 866     {
 867         get_process_info( process, req );
 868         release_object( process );
 869     }
 870 }
 871
 872 /* set information about a process */
 873 DECL_HANDLER(set_process_info)
 874 {
 875     struct process *process;
 876
 877     if ((process = get_process_from_handle( req->handle, PROCESS_SET_INFORMATION )))
 878     {
 879         set_process_info( process, req );
 880         release_object( process );
 881     }
 882 }
 883
 884 /* read data from a process address space */
 885 DECL_HANDLER(read_process_memory)
 886 {
 887     struct process *process;
 888
 889     if ((process = get_process_from_handle( req->handle, PROCESS_VM_READ )))
 890     {
 891         size_t maxlen = get_req_data_size(req) / sizeof(int);
 892         read_process_memory( process, req->addr, req->len, maxlen, get_req_data(req) );
 893         release_object( process );
 894     }
 895 }
 896
 897 /* write data to a process address space */
 898 DECL_HANDLER(write_process_memory)
 899 {
 900     struct process *process;
 901
 902     if ((process = get_process_from_handle( req->handle, PROCESS_VM_WRITE )))
 903     {
 904         size_t maxlen = get_req_data_size(req) / sizeof(int);
 905         write_process_memory( process, req->addr, req->len, maxlen,
 906                               req->first_mask, req->last_mask, get_req_data(req) );
 907         release_object( process );
 908     }
 909 }
 910
 911 /* notify the server that a dll has been loaded */
 912 DECL_HANDLER(load_dll)
 913 {
 914     struct process_dll *dll;
 915     struct file *file = NULL;
 916
 917     if ((req->handle != -1) &&
 918         !(file = get_file_obj( current->process, req->handle, GENERIC_READ ))) return;
 919
 920     if ((dll = process_load_dll( current->process, file, req->base )))
 921     {
 922         dll->dbg_offset = req->dbg_offset;
 923         dll->dbg_size   = req->dbg_size;
 924         dll->name       = req->name;
 925         /* only generate event if initialization is done */
 926         if (!current->process->init_event)
 927             generate_debug_event( current, LOAD_DLL_DEBUG_EVENT, dll );
 928     }
 929     if (file) release_object( file );
 930 }
 931
 932 /* notify the server that a dll is being unloaded */
 933 DECL_HANDLER(unload_dll)
 934 {
 935     process_unload_dll( current->process, req->base );
 936 }
 937
 938 /* wait for a process to start waiting on input */
 939 /* FIXME: only returns event for now, wait is done in the client */
 940 DECL_HANDLER(wait_input_idle)
 941 {
 942     struct process *process;
 943
 944     req->event = -1;
 945     if ((process = get_process_from_handle( req->handle, PROCESS_QUERY_INFORMATION )))
 946     {
 947         if (process->idle_event && process != current->process && process->queue != current->queue)
 948             req->event = alloc_handle( current->process, process->idle_event,
 949                                        EVENT_ALL_ACCESS, 0 );
 950         release_object( process );
 951     }
 952 }