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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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_snapshot  *processes;     /* processes snapshot */
  46     int                       process_count; /* count of processes */
  47     int                       process_pos;   /* current position in proc snapshot */
  48     struct thread_snapshot   *threads;       /* threads snapshot */
  49     int                       thread_count;  /* count of threads */
  50     int                       thread_pos;    /* current position in thread 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_get_type,                  /* get_type */
  61     no_add_queue,                 /* add_queue */
  62     NULL,                         /* remove_queue */
  63     NULL,                         /* signaled */
  64     NULL,                         /* satisfied */
  65     no_signal,                    /* signal */
  66     no_get_fd,                    /* get_fd */
  67     no_map_access,                /* map_access */
  68     default_get_sd,               /* get_sd */
  69     default_set_sd,               /* set_sd */
  70     no_lookup_name,               /* lookup_name */
  71     no_open_file,                 /* open_file */
  72     no_close_handle,              /* close_handle */
  73     snapshot_destroy              /* destroy */
  74 };
  75
  76
  77 /* create a new snapshot */
  78 static struct snapshot *create_snapshot( unsigned int flags )
  79 {
  80     struct snapshot *snapshot;
  81
  82     if (!(snapshot = alloc_object( &snapshot_ops ))) return NULL;
  83
  84     snapshot->process_pos = 0;
  85     snapshot->process_count = 0;
  86     if (flags & SNAP_PROCESS)
  87         snapshot->processes = process_snap( &snapshot->process_count );
  88
  89     snapshot->thread_pos = 0;
  90     snapshot->thread_count = 0;
  91     if (flags & SNAP_THREAD)
  92         snapshot->threads = thread_snap( &snapshot->thread_count );
  93
  94     return snapshot;
  95 }
  96
  97 /* get the next process in the snapshot */
  98 static int snapshot_next_process( struct snapshot *snapshot, struct next_process_reply *reply )
  99 {
 100     struct process_snapshot *ptr;
 101     struct process_dll *exe_module;
 102
 103     if (!snapshot->process_count)
 104     {
 105         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 106         return 0;
 107     }
 108     if (snapshot->process_pos >= snapshot->process_count)
 109     {
 110         set_error( STATUS_NO_MORE_FILES );
 111         return 0;
 112     }
 113     ptr = &snapshot->processes[snapshot->process_pos++];
 114     reply->count    = ptr->count;
 115     reply->pid      = get_process_id( ptr->process );
 116     reply->ppid     = ptr->process->parent ? get_process_id( ptr->process->parent ) : 0;
 117     reply->threads  = ptr->threads;
 118     reply->priority = ptr->priority;
 119     reply->handles  = ptr->handles;
 120     if ((exe_module = get_process_exe_module( ptr->process )) && exe_module->filename)
 121     {
 122         data_size_t len = min( exe_module->namelen, get_reply_max_size() );
 123         set_reply_data( exe_module->filename, len );
 124     }
 125     return 1;
 126 }
 127
 128 /* get the next thread in the snapshot */
 129 static int snapshot_next_thread( struct snapshot *snapshot, struct next_thread_reply *reply )
 130 {
 131     struct thread_snapshot *ptr;
 132
 133     if (!snapshot->thread_count)
 134     {
 135         set_error( STATUS_INVALID_PARAMETER );  /* FIXME */
 136         return 0;
 137     }
 138     if (snapshot->thread_pos >= snapshot->thread_count)
 139     {
 140         set_error( STATUS_NO_MORE_FILES );
 141         return 0;
 142     }
 143     ptr = &snapshot->threads[snapshot->thread_pos++];
 144     reply->count     = ptr->count;
 145     reply->pid       = get_process_id( ptr->thread->process );
 146     reply->tid       = get_thread_id( ptr->thread );
 147     reply->base_pri  = ptr->priority;
 148     reply->delta_pri = 0;  /* FIXME */
 149     return 1;
 150 }
 151
 152 static void snapshot_dump( struct object *obj, int verbose )
 153 {
 154     struct snapshot *snapshot = (struct snapshot *)obj;
 155     assert( obj->ops == &snapshot_ops );
 156     fprintf( stderr, "Snapshot: %d procs %d threads\n",
 157              snapshot->process_count, snapshot->thread_count );
 158 }
 159
 160 static void snapshot_destroy( struct object *obj )
 161 {
 162     int i;
 163     struct snapshot *snapshot = (struct snapshot *)obj;
 164     assert( obj->ops == &snapshot_ops );
 165     if (snapshot->process_count)
 166     {
 167         for (i = 0; i < snapshot->process_count; i++)
 168             release_object( snapshot->processes[i].process );
 169         free( snapshot->processes );
 170     }
 171     if (snapshot->thread_count)
 172     {
 173         for (i = 0; i < snapshot->thread_count; i++)
 174             release_object( snapshot->threads[i].thread );
 175         free( snapshot->threads );
 176     }
 177 }
 178
 179 /* create a snapshot */
 180 DECL_HANDLER(create_snapshot)
 181 {
 182     struct snapshot *snapshot;
 183
 184     reply->handle = 0;
 185     if ((snapshot = create_snapshot( req->flags )))
 186     {
 187         reply->handle = alloc_handle( current->process, snapshot, 0, req->attributes );
 188         release_object( snapshot );
 189     }
 190 }
 191
 192 /* get the next process from a snapshot */
 193 DECL_HANDLER(next_process)
 194 {
 195     struct snapshot *snapshot;
 196
 197     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 198                                                        0, &snapshot_ops )))
 199     {
 200         if (req->reset) snapshot->process_pos = 0;
 201         snapshot_next_process( snapshot, reply );
 202         release_object( snapshot );
 203     }
 204 }
 205
 206 /* get the next thread from a snapshot */
 207 DECL_HANDLER(next_thread)
 208 {
 209     struct snapshot *snapshot;
 210
 211     if ((snapshot = (struct snapshot *)get_handle_obj( current->process, req->handle,
 212                                                        0, &snapshot_ops )))
 213     {
 214         if (req->reset) snapshot->thread_pos = 0;
 215         snapshot_next_thread( snapshot, reply );
 216         release_object( snapshot );
 217     }
 218 }