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 #include "tlhelp32.h"
  32
  33 #include "handle.h"
  34 #include "process.h"
  35 #include "thread.h"
  36 #include "request.h"
  37
  38
  39 struct snapshot
  40 {
  41     struct object             obj;           /* object header */
  42     struct process           *process;       /* process of this snapshot (for modules and heaps) */
  43     struct process_snapshot  *processes;     /* processes snapshot */
  44     int                       process_count; /* count of processes */
  45     int                       process_pos;   /* current position in proc snapshot */
  46     struct thread_snapshot   *threads;       /* threads snapshot */
  47     int                       thread_count;  /* count of threads */
  48     int                       thread_pos;    /* current position in thread snapshot */
  49     struct module_snapshot   *modules;       /* modules snapshot */
  50     int                       module_count;  /* count of modules */
  51     int                       module_pos;    /* current position in module snapshot */
  52 };
  53
  54 static void snapshot_dump( struct object *obj, int verbose );
  55 static void snapshot_destroy( struct object *obj );
  56
  57 static const struct object_ops snapshot_ops =
  58 {
  59     sizeof(struct snapshot),      /* size */
  60     snapshot_dump,                /* dump */
  61     no_add_queue,                 /* add_queue */
  62     NULL,                         /* remove_queue */
  63     NULL,                         /* signaled */
  64     NULL,                         /* satisfied */
  65     NULL,                         /* get_poll_events */
  66     NULL,                         /* poll_event */
  67     no_get_fd,                    /* get_fd */
  68     no_flush,                     /* flush */
  69     no_get_file_info,             /* get_file_info */
  70     NULL,                         /* queue_async */
  71     snapshot_destroy              /* destroy */
  72 };
  73
  74
  75 /* create a new snapshot */
  76 static struct snapshot *create_snapshot( void *pid, int flags )
  77 {
  78     struct process *process = NULL;
  79     struct snapshot *snapshot;
  80
  81     /* need a process for modules and heaps */
  82     if (flags & (TH32CS_SNAPMODULE|TH32CS_SNAPHEAPLIST))
  83     {
  84         if (!pid) process = (struct process *)grab_object( current->process );
  85         else if (!(process = get_process_from_id( pid ))) return NULL;
  86     }
  87
  88     if (!(snapshot = alloc_object( &snapshot_ops, -1 )))
  89     {
  90         if (process) release_object( process );
  91         return NULL;
  92     }
  93
  94     snapshot->process = process;
  95
  96     snapshot->process_pos = 0;
  97     snapshot->process_count = 0;
  98     if (flags & TH32CS_SNAPPROCESS)
  99         snapshot->processes = process_snap( &snapshot->process_count );
 100
 101     snapshot->thread_pos = 0;
 102     snapshot->thread_count = 0;
 103     if (flags & TH32CS_SNAPTHREAD)
 104         snapshot->threads = thread_snap( &snapshot->thread_count );
 105
 106     snapshot->module_pos = 0;
 107     snapshot->module_count = 0;
 108     if (flags & TH32CS_SNAPMODULE)
 109         snapshot->modules = module_snap( process, &snapshot->module_count );
 110
 111     return snapshot;
 112 }
 113
 114 /* get the next process in the snapshot */
 115 static int snapshot_next_process( struct snapshot *snapshot, struct next_process_reply *reply )
 116 {
 117     struct process_snapshot *ptr;
 118
 119     if (!snapshot->process_count)
 120     {
 121         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 122         return 0;
 123     }
 124     if (snapshot->process_pos >= snapshot->process_count)
 125     {
 126         set_error( STATUS_NO_MORE_FILES );
 127         return 0;
 128     }
 129     ptr = &snapshot->processes[snapshot->process_pos++];
 130     reply->count    = ptr->count;
 131     reply->pid      = get_process_id( ptr->process );
 132     reply->ppid     = get_process_id( ptr->process->parent );
 133     reply->heap     = 0;  /* FIXME */
 134     reply->module   = 0;  /* FIXME */
 135     reply->threads  = ptr->threads;
 136     reply->priority = ptr->priority;
 137     if (ptr->process->exe.filename)
 138     {
 139         size_t len = min( ptr->process->exe.namelen, get_reply_max_size() );
 140         set_reply_data( ptr->process->exe.filename, len );
 141     }
 142     return 1;
 143 }
 144
 145 /* get the next thread in the snapshot */
 146 static int snapshot_next_thread( struct snapshot *snapshot, struct next_thread_reply *reply )
 147 {
 148     struct thread_snapshot *ptr;
 149
 150     if (!snapshot->thread_count)
 151     {
 152         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 153         return 0;
 154     }
 155     if (snapshot->thread_pos >= snapshot->thread_count)
 156     {
 157         set_error( STATUS_NO_MORE_FILES );
 158         return 0;
 159     }
 160     ptr = &snapshot->threads[snapshot->thread_pos++];
 161     reply->count     = ptr->count;
 162     reply->pid       = get_process_id( ptr->thread->process );
 163     reply->tid       = get_thread_id( ptr->thread );
 164     reply->base_pri  = ptr->priority;
 165     reply->delta_pri = 0;  /* FIXME */
 166     return 1;
 167 }
 168
 169 /* get the next module in the snapshot */
 170 static int snapshot_next_module( struct snapshot *snapshot, struct next_module_reply *reply )
 171 {
 172     struct module_snapshot *ptr;
 173
 174     if (!snapshot->module_count)
 175     {
 176         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 177         return 0;
 178     }
 179     if (snapshot->module_pos >= snapshot->module_count)
 180     {
 181         set_error( STATUS_NO_MORE_FILES );
 182         return 0;
 183     }
 184     ptr = &snapshot->modules[snapshot->module_pos++];
 185     reply->pid  = get_process_id( snapshot->process );
 186     reply->base = ptr->base;
 187     reply->size = ptr->size;
 188     if (ptr->filename)
 189     {
 190         size_t len = min( ptr->namelen, get_reply_max_size() );
 191         set_reply_data( ptr->filename, len );
 192     }
 193     return 1;
 194 }
 195
 196 static void snapshot_dump( struct object *obj, int verbose )
 197 {
 198     struct snapshot *snapshot = (struct snapshot *)obj;
 199     assert( obj->ops == &snapshot_ops );
 200     fprintf( stderr, "Snapshot: %d procs %d threads %d modules\n",
 201              snapshot->process_count, snapshot->thread_count, snapshot->module_count );
 202 }
 203
 204 static void snapshot_destroy( struct object *obj )
 205 {
 206     int i;
 207     struct snapshot *snapshot = (struct snapshot *)obj;
 208     assert( obj->ops == &snapshot_ops );
 209     if (snapshot->process_count)
 210     {
 211         for (i = 0; i < snapshot->process_count; i++)
 212             release_object( snapshot->processes[i].process );
 213         free( snapshot->processes );
 214     }
 215     if (snapshot->thread_count)
 216     {
 217         for (i = 0; i < snapshot->thread_count; i++)
 218             release_object( snapshot->threads[i].thread );
 219         free( snapshot->threads );
 220     }
 221     if (snapshot->module_count)
 222     {
 223         for (i = 0; i < snapshot->module_count; i++)
 224             free( snapshot->modules[i].filename );
 225         free( snapshot->modules );
 226     }
 227     if (snapshot->process) release_object( snapshot->process );
 228 }
 229
 230 /* create a snapshot */
 231 DECL_HANDLER(create_snapshot)
 232 {
 233     struct snapshot *snapshot;
 234
 235     reply->handle = 0;
 236     if ((snapshot = create_snapshot( req->pid, req->flags )))
 237     {
 238         reply->handle = alloc_handle( current->process, snapshot, 0, req->inherit );
 239         release_object( snapshot );
 240     }
 241 }
 242
 243 /* get the next process from a snapshot */
 244 DECL_HANDLER(next_process)
 245 {
 246     struct snapshot *snapshot;
 247
 248     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 249                                                        0, &snapshot_ops )))
 250     {
 251         if (req->reset) snapshot->process_pos = 0;
 252         snapshot_next_process( snapshot, reply );
 253         release_object( snapshot );
 254     }
 255 }
 256
 257 /* get the next thread from a snapshot */
 258 DECL_HANDLER(next_thread)
 259 {
 260     struct snapshot *snapshot;
 261
 262     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 263                                                        0, &snapshot_ops )))
 264     {
 265         if (req->reset) snapshot->thread_pos = 0;
 266         snapshot_next_thread( snapshot, reply );
 267         release_object( snapshot );
 268     }
 269 }
 270
 271 /* get the next module from a snapshot */
 272 DECL_HANDLER(next_module)
 273 {
 274     struct snapshot *snapshot;
 275
 276     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 277                                                        0, &snapshot_ops )))
 278     {
 279         if (req->reset) snapshot->module_pos = 0;
 280         snapshot_next_module( snapshot, reply );
 281         release_object( snapshot );
 282     }
 283 }