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, -1 )))
  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     if (ptr->process->exe.filename)
 132     {
 133         size_t len = min( ptr->process->exe.namelen, get_reply_max_size() );
 134         set_reply_data( ptr->process->exe.filename, len );
 135     }
 136     return 1;
 137 }
 138
 139 /* get the next thread in the snapshot */
 140 static int snapshot_next_thread( struct snapshot *snapshot, struct next_thread_reply *reply )
 141 {
 142     struct thread_snapshot *ptr;
 143
 144     if (!snapshot->thread_count)
 145     {
 146         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 147         return 0;
 148     }
 149     if (snapshot->thread_pos >= snapshot->thread_count)
 150     {
 151         set_error( STATUS_NO_MORE_FILES );
 152         return 0;
 153     }
 154     ptr = &snapshot->threads[snapshot->thread_pos++];
 155     reply->count     = ptr->count;
 156     reply->pid       = get_process_id( ptr->thread->process );
 157     reply->tid       = get_thread_id( ptr->thread );
 158     reply->base_pri  = ptr->priority;
 159     reply->delta_pri = 0;  /* FIXME */
 160     return 1;
 161 }
 162
 163 /* get the next module in the snapshot */
 164 static int snapshot_next_module( struct snapshot *snapshot, struct next_module_reply *reply )
 165 {
 166     struct module_snapshot *ptr;
 167
 168     if (!snapshot->module_count)
 169     {
 170         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 171         return 0;
 172     }
 173     if (snapshot->module_pos >= snapshot->module_count)
 174     {
 175         set_error( STATUS_NO_MORE_FILES );
 176         return 0;
 177     }
 178     ptr = &snapshot->modules[snapshot->module_pos++];
 179     reply->pid  = get_process_id( snapshot->process );
 180     reply->base = ptr->base;
 181     reply->size = ptr->size;
 182     if (ptr->filename)
 183     {
 184         size_t len = min( ptr->namelen, get_reply_max_size() );
 185         set_reply_data( ptr->filename, len );
 186     }
 187     return 1;
 188 }
 189
 190 static void snapshot_dump( struct object *obj, int verbose )
 191 {
 192     struct snapshot *snapshot = (struct snapshot *)obj;
 193     assert( obj->ops == &snapshot_ops );
 194     fprintf( stderr, "Snapshot: %d procs %d threads %d modules\n",
 195              snapshot->process_count, snapshot->thread_count, snapshot->module_count );
 196 }
 197
 198 static void snapshot_destroy( struct object *obj )
 199 {
 200     int i;
 201     struct snapshot *snapshot = (struct snapshot *)obj;
 202     assert( obj->ops == &snapshot_ops );
 203     if (snapshot->process_count)
 204     {
 205         for (i = 0; i < snapshot->process_count; i++)
 206             release_object( snapshot->processes[i].process );
 207         free( snapshot->processes );
 208     }
 209     if (snapshot->thread_count)
 210     {
 211         for (i = 0; i < snapshot->thread_count; i++)
 212             release_object( snapshot->threads[i].thread );
 213         free( snapshot->threads );
 214     }
 215     if (snapshot->module_count)
 216     {
 217         for (i = 0; i < snapshot->module_count; i++)
 218             free( snapshot->modules[i].filename );
 219         free( snapshot->modules );
 220     }
 221     if (snapshot->process) release_object( snapshot->process );
 222 }
 223
 224 /* create a snapshot */
 225 DECL_HANDLER(create_snapshot)
 226 {
 227     struct snapshot *snapshot;
 228
 229     reply->handle = 0;
 230     if ((snapshot = create_snapshot( req->pid, req->flags )))
 231     {
 232         reply->handle = alloc_handle( current->process, snapshot, 0, req->inherit );
 233         release_object( snapshot );
 234     }
 235 }
 236
 237 /* get the next process from a snapshot */
 238 DECL_HANDLER(next_process)
 239 {
 240     struct snapshot *snapshot;
 241
 242     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 243                                                        0, &snapshot_ops )))
 244     {
 245         if (req->reset) snapshot->process_pos = 0;
 246         snapshot_next_process( snapshot, reply );
 247         release_object( snapshot );
 248     }
 249 }
 250
 251 /* get the next thread from a snapshot */
 252 DECL_HANDLER(next_thread)
 253 {
 254     struct snapshot *snapshot;
 255
 256     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 257                                                        0, &snapshot_ops )))
 258     {
 259         if (req->reset) snapshot->thread_pos = 0;
 260         snapshot_next_thread( snapshot, reply );
 261         release_object( snapshot );
 262     }
 263 }
 264
 265 /* get the next module from a snapshot */
 266 DECL_HANDLER(next_module)
 267 {
 268     struct snapshot *snapshot;
 269
 270     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 271                                                        0, &snapshot_ops )))
 272     {
 273         if (req->reset) snapshot->module_pos = 0;
 274         snapshot_next_module( snapshot, reply );
 275         release_object( snapshot );
 276     }
 277 }