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 }
219
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