server/snapshot.c

   1 /*
   2  * Server-side snapshots
   3  *
   4  * Copyright (C) 1999 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * FIXME: heap snapshots not implemented
  21  */
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <assert.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29
  30 #include "windef.h"
  31
  32 #include "handle.h"
  33 #include "process.h"
  34 #include "thread.h"
  35 #include "request.h"
  36
  37
  38 struct snapshot
  39 {
  40     struct object             obj;           /* object header */
  41     struct process           *process;       /* process of this snapshot (for modules and heaps) */
  42     struct process_snapshot  *processes;     /* processes snapshot */
  43     int                       process_count; /* count of processes */
  44     int                       process_pos;   /* current position in proc snapshot */
  45     struct thread_snapshot   *threads;       /* threads snapshot */
  46     int                       thread_count;  /* count of threads */
  47     int                       thread_pos;    /* current position in thread snapshot */
  48     struct module_snapshot   *modules;       /* modules snapshot */
  49     int                       module_count;  /* count of modules */
  50     int                       module_pos;    /* current position in module snapshot */
  51 };
  52
  53 static void snapshot_dump( struct object *obj, int verbose );
  54 static void snapshot_destroy( struct object *obj );
  55
  56 static const struct object_ops snapshot_ops =
  57 {
  58     sizeof(struct snapshot),      /* size */
  59     snapshot_dump,                /* dump */
  60     no_add_queue,                 /* add_queue */
  61     NULL,                         /* remove_queue */
  62     NULL,                         /* signaled */
  63     NULL,                         /* satisfied */
  64     no_get_fd,                    /* get_fd */
  65     snapshot_destroy              /* destroy */
  66 };
  67
  68
  69 /* create a new snapshot */
  70 static struct snapshot *create_snapshot( process_id_t pid, int flags )
  71 {
  72     struct process *process = NULL;
  73     struct snapshot *snapshot;
  74
  75     /* need a process for modules and heaps */
  76     if (flags & (SNAP_MODULE|SNAP_HEAPLIST))
  77     {
  78         if (!pid) process = (struct process *)grab_object( current->process );
  79         else if (!(process = get_process_from_id( pid ))) return NULL;
  80     }
  81
  82     if (!(snapshot = alloc_object( &snapshot_ops )))
  83     {
  84         if (process) release_object( process );
  85         return NULL;
  86     }
  87
  88     snapshot->process = process;
  89
  90     snapshot->process_pos = 0;
  91     snapshot->process_count = 0;
  92     if (flags & SNAP_PROCESS)
  93         snapshot->processes = process_snap( &snapshot->process_count );
  94
  95     snapshot->thread_pos = 0;
  96     snapshot->thread_count = 0;
  97     if (flags & SNAP_THREAD)
  98         snapshot->threads = thread_snap( &snapshot->thread_count );
  99
 100     snapshot->module_pos = 0;
 101     snapshot->module_count = 0;
 102     if (flags & SNAP_MODULE)
 103         snapshot->modules = module_snap( process, &snapshot->module_count );
 104
 105     return snapshot;
 106 }
 107
 108 /* get the next process in the snapshot */
 109 static int snapshot_next_process( struct snapshot *snapshot, struct next_process_reply *reply )
 110 {
 111     struct process_snapshot *ptr;
 112
 113     if (!snapshot->process_count)
 114     {
 115         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 116         return 0;
 117     }
 118     if (snapshot->process_pos >= snapshot->process_count)
 119     {
 120         set_error( STATUS_NO_MORE_FILES );
 121         return 0;
 122     }
 123     ptr = &snapshot->processes[snapshot->process_pos++];
 124     reply->count    = ptr->count;
 125     reply->pid      = get_process_id( ptr->process );
 126     reply->ppid     = ptr->process->parent ? get_process_id( ptr->process->parent ) : 0;
 127     reply->heap     = 0;  /* FIXME */
 128     reply->module   = 0;  /* FIXME */
 129     reply->threads  = ptr->threads;
 130     reply->priority = ptr->priority;
 131     reply->handles  = ptr->handles;
 132     if (ptr->process->exe.filename)
 133     {
 134         size_t len = min( ptr->process->exe.namelen, get_reply_max_size() );
 135         set_reply_data( ptr->process->exe.filename, len );
 136     }
 137     return 1;
 138 }
 139
 140 /* get the next thread in the snapshot */
 141 static int snapshot_next_thread( struct snapshot *snapshot, struct next_thread_reply *reply )
 142 {
 143     struct thread_snapshot *ptr;
 144
 145     if (!snapshot->thread_count)
 146     {
 147         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 148         return 0;
 149     }
 150     if (snapshot->thread_pos >= snapshot->thread_count)
 151     {
 152         set_error( STATUS_NO_MORE_FILES );
 153         return 0;
 154     }
 155     ptr = &snapshot->threads[snapshot->thread_pos++];
 156     reply->count     = ptr->count;
 157     reply->pid       = get_process_id( ptr->thread->process );
 158     reply->tid       = get_thread_id( ptr->thread );
 159     reply->base_pri  = ptr->priority;
 160     reply->delta_pri = 0;  /* FIXME */
 161     return 1;
 162 }
 163
 164 /* get the next module in the snapshot */
 165 static int snapshot_next_module( struct snapshot *snapshot, struct next_module_reply *reply )
 166 {
 167     struct module_snapshot *ptr;
 168
 169     if (!snapshot->module_count)
 170     {
 171         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 172         return 0;
 173     }
 174     if (snapshot->module_pos >= snapshot->module_count)
 175     {
 176         set_error( STATUS_NO_MORE_FILES );
 177         return 0;
 178     }
 179     ptr = &snapshot->modules[snapshot->module_pos++];
 180     reply->pid  = get_process_id( snapshot->process );
 181     reply->base = ptr->base;
 182     reply->size = ptr->size;
 183     if (ptr->filename)
 184     {
 185         size_t len = min( ptr->namelen, get_reply_max_size() );
 186         set_reply_data( ptr->filename, len );
 187     }
 188     return 1;
 189 }
 190
 191 static void snapshot_dump( struct object *obj, int verbose )
 192 {
 193     struct snapshot *snapshot = (struct snapshot *)obj;
 194     assert( obj->ops == &snapshot_ops );
 195     fprintf( stderr, "Snapshot: %d procs %d threads %d modules\n",
 196              snapshot->process_count, snapshot->thread_count, snapshot->module_count );
 197 }
 198
 199 static void snapshot_destroy( struct object *obj )
 200 {
 201     int i;
 202     struct snapshot *snapshot = (struct snapshot *)obj;
 203     assert( obj->ops == &snapshot_ops );
 204     if (snapshot->process_count)
 205     {
 206         for (i = 0; i < snapshot->process_count; i++)
 207             release_object( snapshot->processes[i].process );
 208         free( snapshot->processes );
 209     }
 210     if (snapshot->thread_count)
 211     {
 212         for (i = 0; i < snapshot->thread_count; i++)
 213             release_object( snapshot->threads[i].thread );
 214         free( snapshot->threads );
 215     }
 216     if (snapshot->module_count)
 217     {
 218         for (i = 0; i < snapshot->module_count; i++)
 219             free( snapshot->modules[i].filename );
 220         free( snapshot->modules );
 221     }
 222     if (snapshot->process) release_object( snapshot->process );
 223 }
 224
 225 /* create a snapshot */
 226 DECL_HANDLER(create_snapshot)
 227 {
 228     struct snapshot *snapshot;
 229
 230     reply->handle = 0;
 231     if ((snapshot = create_snapshot( req->pid, req->flags )))
 232     {
 233         reply->handle = alloc_handle( current->process, snapshot, 0, req->inherit );
 234         release_object( snapshot );
 235     }
 236 }
 237
 238 /* get the next process from a snapshot */
 239 DECL_HANDLER(next_process)
 240 {
 241     struct snapshot *snapshot;
 242
 243     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 244                                                        0, &snapshot_ops )))
 245     {
 246         if (req->reset) snapshot->process_pos = 0;
 247         snapshot_next_process( snapshot, reply );
 248         release_object( snapshot );
 249     }
 250 }
 251
 252 /* get the next thread from a snapshot */
 253 DECL_HANDLER(next_thread)
 254 {
 255     struct snapshot *snapshot;
 256
 257     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 258                                                        0, &snapshot_ops )))
 259     {
 260         if (req->reset) snapshot->thread_pos = 0;
 261         snapshot_next_thread( snapshot, reply );
 262         release_object( snapshot );
 263     }
 264 }
 265
 266 /* get the next module from a snapshot */
 267 DECL_HANDLER(next_module)
 268 {
 269     struct snapshot *snapshot;
 270
 271     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 272                                                        0, &snapshot_ops )))
 273     {
 274         if (req->reset) snapshot->module_pos = 0;
 275         snapshot_next_module( snapshot, reply );
 276         release_object( snapshot );
 277     }
 278 }