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_signal,                    /* signal */
  65     no_get_fd,                    /* get_fd */
  66     snapshot_destroy              /* destroy */
  67 };
  68
  69
  70 /* create a new snapshot */
  71 static struct snapshot *create_snapshot( process_id_t pid, int flags )
  72 {
  73     struct process *process = NULL;
  74     struct snapshot *snapshot;
  75
  76     /* need a process for modules and heaps */
  77     if (flags & (SNAP_MODULE|SNAP_HEAPLIST))
  78     {
  79         if (!pid) process = (struct process *)grab_object( current->process );
  80         else if (!(process = get_process_from_id( pid ))) return NULL;
  81     }
  82
  83     if (!(snapshot = alloc_object( &snapshot_ops )))
  84     {
  85         if (process) release_object( process );
  86         return NULL;
  87     }
  88
  89     snapshot->process = process;
  90
  91     snapshot->process_pos = 0;
  92     snapshot->process_count = 0;
  93     if (flags & SNAP_PROCESS)
  94         snapshot->processes = process_snap( &snapshot->process_count );
  95
  96     snapshot->thread_pos = 0;
  97     snapshot->thread_count = 0;
  98     if (flags & SNAP_THREAD)
  99         snapshot->threads = thread_snap( &snapshot->thread_count );
 100
 101     snapshot->module_pos = 0;
 102     snapshot->module_count = 0;
 103     if (flags & SNAP_MODULE)
 104         snapshot->modules = module_snap( process, &snapshot->module_count );
 105
 106     return snapshot;
 107 }
 108
 109 /* get the next process in the snapshot */
 110 static int snapshot_next_process( struct snapshot *snapshot, struct next_process_reply *reply )
 111 {
 112     struct process_snapshot *ptr;
 113
 114     if (!snapshot->process_count)
 115     {
 116         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 117         return 0;
 118     }
 119     if (snapshot->process_pos >= snapshot->process_count)
 120     {
 121         set_error( STATUS_NO_MORE_FILES );
 122         return 0;
 123     }
 124     ptr = &snapshot->processes[snapshot->process_pos++];
 125     reply->count    = ptr->count;
 126     reply->pid      = get_process_id( ptr->process );
 127     reply->ppid     = ptr->process->parent ? get_process_id( ptr->process->parent ) : 0;
 128     reply->heap     = 0;  /* FIXME */
 129     reply->module   = 0;  /* FIXME */
 130     reply->threads  = ptr->threads;
 131     reply->priority = ptr->priority;
 132     reply->handles  = ptr->handles;
 133     if (ptr->process->exe.filename)
 134     {
 135         size_t len = min( ptr->process->exe.namelen, get_reply_max_size() );
 136         set_reply_data( ptr->process->exe.filename, len );
 137     }
 138     return 1;
 139 }
 140
 141 /* get the next thread in the snapshot */
 142 static int snapshot_next_thread( struct snapshot *snapshot, struct next_thread_reply *reply )
 143 {
 144     struct thread_snapshot *ptr;
 145
 146     if (!snapshot->thread_count)
 147     {
 148         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 149         return 0;
 150     }
 151     if (snapshot->thread_pos >= snapshot->thread_count)
 152     {
 153         set_error( STATUS_NO_MORE_FILES );
 154         return 0;
 155     }
 156     ptr = &snapshot->threads[snapshot->thread_pos++];
 157     reply->count     = ptr->count;
 158     reply->pid       = get_process_id( ptr->thread->process );
 159     reply->tid       = get_thread_id( ptr->thread );
 160     reply->base_pri  = ptr->priority;
 161     reply->delta_pri = 0;  /* FIXME */
 162     return 1;
 163 }
 164
 165 /* get the next module in the snapshot */
 166 static int snapshot_next_module( struct snapshot *snapshot, struct next_module_reply *reply )
 167 {
 168     struct module_snapshot *ptr;
 169
 170     if (!snapshot->module_count)
 171     {
 172         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 173         return 0;
 174     }
 175     if (snapshot->module_pos >= snapshot->module_count)
 176     {
 177         set_error( STATUS_NO_MORE_FILES );
 178         return 0;
 179     }
 180     ptr = &snapshot->modules[snapshot->module_pos++];
 181     reply->pid  = get_process_id( snapshot->process );
 182     reply->base = ptr->base;
 183     reply->size = ptr->size;
 184     if (ptr->filename)
 185     {
 186         size_t len = min( ptr->namelen, get_reply_max_size() );
 187         set_reply_data( ptr->filename, len );
 188     }
 189     return 1;
 190 }
 191
 192 static void snapshot_dump( struct object *obj, int verbose )
 193 {
 194     struct snapshot *snapshot = (struct snapshot *)obj;
 195     assert( obj->ops == &snapshot_ops );
 196     fprintf( stderr, "Snapshot: %d procs %d threads %d modules\n",
 197              snapshot->process_count, snapshot->thread_count, snapshot->module_count );
 198 }
 199
 200 static void snapshot_destroy( struct object *obj )
 201 {
 202     int i;
 203     struct snapshot *snapshot = (struct snapshot *)obj;
 204     assert( obj->ops == &snapshot_ops );
 205     if (snapshot->process_count)
 206     {
 207         for (i = 0; i < snapshot->process_count; i++)
 208             release_object( snapshot->processes[i].process );
 209         free( snapshot->processes );
 210     }
 211     if (snapshot->thread_count)
 212     {
 213         for (i = 0; i < snapshot->thread_count; i++)
 214             release_object( snapshot->threads[i].thread );
 215         free( snapshot->threads );
 216     }
 217     if (snapshot->module_count)
 218     {
 219         for (i = 0; i < snapshot->module_count; i++)
 220             free( snapshot->modules[i].filename );
 221         free( snapshot->modules );
 222     }
 223     if (snapshot->process) release_object( snapshot->process );
 224 }
 225
 226 /* create a snapshot */
 227 DECL_HANDLER(create_snapshot)
 228 {
 229     struct snapshot *snapshot;
 230
 231     reply->handle = 0;
 232     if ((snapshot = create_snapshot( req->pid, req->flags )))
 233     {
 234         reply->handle = alloc_handle( current->process, snapshot, 0, req->inherit );
 235         release_object( snapshot );
 236     }
 237 }
 238
 239 /* get the next process from a snapshot */
 240 DECL_HANDLER(next_process)
 241 {
 242     struct snapshot *snapshot;
 243
 244     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 245                                                        0, &snapshot_ops )))
 246     {
 247         if (req->reset) snapshot->process_pos = 0;
 248         snapshot_next_process( snapshot, reply );
 249         release_object( snapshot );
 250     }
 251 }
 252
 253 /* get the next thread from a snapshot */
 254 DECL_HANDLER(next_thread)
 255 {
 256     struct snapshot *snapshot;
 257
 258     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 259                                                        0, &snapshot_ops )))
 260     {
 261         if (req->reset) snapshot->thread_pos = 0;
 262         snapshot_next_thread( snapshot, reply );
 263         release_object( snapshot );
 264     }
 265 }
 266
 267 /* get the next module from a snapshot */
 268 DECL_HANDLER(next_module)
 269 {
 270     struct snapshot *snapshot;
 271
 272     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 273                                                        0, &snapshot_ops )))
 274     {
 275         if (req->reset) snapshot->module_pos = 0;
 276         snapshot_next_module( snapshot, reply );
 277         release_object( snapshot );
 278     }
 279 }