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