blob: 25d3330955dcbf903192f9a17961db4ea0613558 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
(* TEST
* hassysthreads
include systhreads
** bytecode
** native
*)
let log s =
Printf.printf "%s\n%!" s
let mutex_lock_must_fail m =
try
Mutex.lock m; log "Should have failed!"
with Sys_error _ ->
log "Error reported"
let mutex_unlock_must_fail m =
try
Mutex.unlock m; log "Should have failed!"
with Sys_error _ ->
log "Error reported"
let mutex_deadlock () =
let m = Mutex.create() in
log "Acquiring mutex";
Mutex.lock m;
log "Acquiring mutex again";
mutex_lock_must_fail m;
log "Releasing mutex";
Mutex.unlock m;
let f () =
log "Acquiring mutex from another thread";
Mutex.lock m;
log "Success";
Mutex.unlock m in
Thread.join (Thread.create f ())
let mutex_unlock_twice () =
let m = Mutex.create() in
log "Acquiring mutex";
Mutex.lock m;
log "Releasing mutex";
Mutex.unlock m;
log "Releasing mutex again";
mutex_unlock_must_fail m;
log "Releasing mutex one more time";
mutex_unlock_must_fail m
let mutex_unlock_other_thread () =
let m = Mutex.create() in
log "Acquiring mutex";
Mutex.lock m;
let f () =
log "Releasing mutex from another thread";
mutex_unlock_must_fail m;
log "Releasing mutex from another thread (again)";
mutex_unlock_must_fail m in
Thread.join (Thread.create f ())
let _ =
log "---- Self deadlock";
mutex_deadlock();
log "---- Unlock twice";
mutex_unlock_twice();
log "---- Unlock in other thread";
mutex_unlock_other_thread()
|