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 #include <stdarg.h>
  30
  31 #include "ntstatus.h"
  32 #define WIN32_NO_STATUS
  33 #include "windef.h"
  34 #include "winternl.h"
  35
  36 #include "handle.h"
  37 #include "process.h"
  38 #include "thread.h"
  39 #include "request.h"
  40
  41
  42 struct snapshot
  43 {
  44     struct object             obj;           /* object header */
  45     struct process           *process;       /* process of this snapshot (for modules and heaps) */
  46     struct process_snapshot  *processes;     /* processes snapshot */
  47     int                       process_count; /* count of processes */
  48     int                       process_pos;   /* current position in proc snapshot */
  49     struct thread_snapshot   *threads;       /* threads snapshot */
  50     int                       thread_count;  /* count of threads */
  51     int                       thread_pos;    /* current position in thread snapshot */
  52     struct module_snapshot   *modules;       /* modules snapshot */
  53     int                       module_count;  /* count of modules */
  54     int                       module_pos;    /* current position in module snapshot */
  55 };
  56
  57 static void snapshot_dump( struct object *obj, int verbose );
  58 static void snapshot_destroy( struct object *obj );
  59
  60 static const struct object_ops snapshot_ops =
  61 {
  62     sizeof(struct snapshot),      /* size */
  63     snapshot_dump,                /* dump */
  64     no_add_queue,                 /* add_queue */
  65     NULL,                         /* remove_queue */
  66     NULL,                         /* signaled */
  67     NULL,                         /* satisfied */
  68     no_signal,                    /* signal */
  69     no_get_fd,                    /* get_fd */
  70     no_map_access,                /* map_access */
  71     no_lookup_name,               /* lookup_name */
  72     no_close_handle,              /* close_handle */
  73     snapshot_destroy              /* destroy */
  74 };
  75
  76
  77 /* create a new snapshot */
  78 static struct snapshot *create_snapshot( process_id_t pid, int flags )
  79 {
  80     struct process *process = NULL;
  81     struct snapshot *snapshot;
  82
  83     /* need a process for modules and heaps */
  84     if (flags & (SNAP_MODULE|SNAP_HEAPLIST))
  85     {
  86         if (!pid) process = (struct process *)grab_object( current->process );
  87         else if (!(process = get_process_from_id( pid ))) return NULL;
  88     }
  89
  90     if (!(snapshot = alloc_object( &snapshot_ops )))
  91     {
  92         if (process) release_object( process );
  93         return NULL;
  94     }
  95
  96     snapshot->process = process;
  97
  98     snapshot->process_pos = 0;
  99     snapshot->process_count = 0;
 100     if (flags & SNAP_PROCESS)
 101         snapshot->processes = process_snap( &snapshot->process_count );
 102
 103     snapshot->thread_pos = 0;
 104     snapshot->thread_count = 0;
 105     if (flags & SNAP_THREAD)
 106         snapshot->threads = thread_snap( &snapshot->thread_count );
 107
 108     snapshot->module_pos = 0;
 109     snapshot->module_count = 0;
 110     if (flags & SNAP_MODULE)
 111         snapshot->modules = module_snap( process, &snapshot->module_count );
 112
 113     return snapshot;
 114 }
 115
 116 /* get the next process in the snapshot */
 117 static int snapshot_next_process( struct snapshot *snapshot, struct next_process_reply *reply )
 118 {
 119     struct process_snapshot *ptr;
 120
 121     if (!snapshot->process_count)
 122     {
 123         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 124         return 0;
 125     }
 126     if (snapshot->process_pos >= snapshot->process_count)
 127     {
 128         set_error( STATUS_NO_MORE_FILES );
 129         return 0;
 130     }
 131     ptr = &snapshot->processes[snapshot->process_pos++];
 132     reply->count    = ptr->count;
 133     reply->pid      = get_process_id( ptr->process );
 134     reply->ppid     = ptr->process->parent ? get_process_id( ptr->process->parent ) : 0;
 135     reply->heap     = NULL;  /* FIXME */
 136     reply->module   = NULL;  /* FIXME */
 137     reply->threads  = ptr->threads;
 138     reply->priority = ptr->priority;
 139     reply->handles  = ptr->handles;
 140     if (ptr->process->exe.filename)
 141     {
 142         size_t len = min( ptr->process->exe.namelen, get_reply_max_size() );
 143         set_reply_data( ptr->process->exe.filename, len );
 144     }
 145     return 1;
 146 }
 147
 148 /* get the next thread in the snapshot */
 149 static int snapshot_next_thread( struct snapshot *snapshot, struct next_thread_reply *reply )
 150 {
 151     struct thread_snapshot *ptr;
 152
 153     if (!snapshot->thread_count)
 154     {
 155         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 156         return 0;
 157     }
 158     if (snapshot->thread_pos >= snapshot->thread_count)
 159     {
 160         set_error( STATUS_NO_MORE_FILES );
 161         return 0;
 162     }
 163     ptr = &snapshot->threads[snapshot->thread_pos++];
 164     reply->count     = ptr->count;
 165     reply->pid       = get_process_id( ptr->thread->process );
 166     reply->tid       = get_thread_id( ptr->thread );
 167     reply->base_pri  = ptr->priority;
 168     reply->delta_pri = 0;  /* FIXME */
 169     return 1;
 170 }
 171
 172 /* get the next module in the snapshot */
 173 static int snapshot_next_module( struct snapshot *snapshot, struct next_module_reply *reply )
 174 {
 175     struct module_snapshot *ptr;
 176
 177     if (!snapshot->module_count)
 178     {
 179         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 180         return 0;
 181     }
 182     if (snapshot->module_pos >= snapshot->module_count)
 183     {
 184         set_error( STATUS_NO_MORE_FILES );
 185         return 0;
 186     }
 187     ptr = &snapshot->modules[snapshot->module_pos++];
 188     reply->pid  = get_process_id( snapshot->process );
 189     reply->base = ptr->base;
 190     reply->size = ptr->size;
 191     if (ptr->filename)
 192     {
 193         size_t len = min( ptr->namelen, get_reply_max_size() );
 194         set_reply_data( ptr->filename, len );
 195     }
 196     return 1;
 197 }
 198
 199 static void snapshot_dump( struct object *obj, int verbose )
 200 {
 201     struct snapshot *snapshot = (struct snapshot *)obj;
 202     assert( obj->ops == &snapshot_ops );
 203     fprintf( stderr, "Snapshot: %d procs %d threads %d modules\n",
 204              snapshot->process_count, snapshot->thread_count, snapshot->module_count );
 205 }
 206
 207 static void snapshot_destroy( struct object *obj )
 208 {
 209     int i;
 210     struct snapshot *snapshot = (struct snapshot *)obj;
 211     assert( obj->ops == &snapshot_ops );
 212     if (snapshot->process_count)
 213     {
 214         for (i = 0; i < snapshot->process_count; i++)
 215             release_object( snapshot->processes[i].process );
 216         free( snapshot->processes );
 217     }
 218     if (snapshot->thread_count)
 219     {
 220         for (i = 0; i < snapshot->thread_count; i++)
 221             release_object( snapshot->threads[i].thread );
 222         free( snapshot->threads );
 223     }
 224     if (snapshot->module_count)
 225     {
 226         for (i = 0; i < snapshot->module_count; i++)
 227             free( snapshot->modules[i].filename );
 228         free( snapshot->modules );
 229     }
 230     if (snapshot->process) release_object( snapshot->process );
 231 }
 232
 233 /* create a snapshot */
 234 DECL_HANDLER(create_snapshot)
 235 {
 236     struct snapshot *snapshot;
 237
 238     reply->handle = 0;
 239     if ((snapshot = create_snapshot( req->pid, req->flags )))
 240     {
 241         reply->handle = alloc_handle( current->process, snapshot, 0, req->attributes );
 242         release_object( snapshot );
 243     }
 244 }
 245
 246 /* get the next process from a snapshot */
 247 DECL_HANDLER(next_process)
 248 {
 249     struct snapshot *snapshot;
 250
 251     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 252                                                        0, &snapshot_ops )))
 253     {
 254         if (req->reset) snapshot->process_pos = 0;
 255         snapshot_next_process( snapshot, reply );
 256         release_object( snapshot );
 257     }
 258 }
 259
 260 /* get the next thread from a snapshot */
 261 DECL_HANDLER(next_thread)
 262 {
 263     struct snapshot *snapshot;
 264
 265     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 266                                                        0, &snapshot_ops )))
 267     {
 268         if (req->reset) snapshot->thread_pos = 0;
 269         snapshot_next_thread( snapshot, reply );
 270         release_object( snapshot );
 271     }
 272 }
 273
 274 /* get the next module from a snapshot */
 275 DECL_HANDLER(next_module)
 276 {
 277     struct snapshot *snapshot;
 278
 279     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 280                                                        0, &snapshot_ops )))
 281     {
 282         if (req->reset) snapshot->module_pos = 0;
 283         snapshot_next_module( snapshot, reply );
 284         release_object( snapshot );
 285     }
 286 }