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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
// Test case for Issue #770
// https://github.com/typetools/checker-framework/issues/770
import org.checkerframework.checker.lock.qual.GuardedBy;
public class ViewpointAdaptation3 {
class MyClass {
Object field;
}
class LockExample {
protected final Object myLock = new Object();
protected @GuardedBy("myLock") MyClass locked;
@GuardedBy("this.myLock") MyClass m1;
protected @GuardedBy("this.myLock") MyClass locked2;
public void accessLock() {
synchronized (myLock) {
this.locked.field = new Object();
}
}
}
class LockExampleSubclass extends LockExample {
private final Object myLock = new Object();
private @GuardedBy("this.myLock") MyClass locked;
@GuardedBy("this.myLock") MyClass m2;
public LockExampleSubclass() {
final LockExampleSubclass les1 = new LockExampleSubclass();
final LockExampleSubclass les2 = new LockExampleSubclass();
final LockExampleSubclass les3 = les2;
LockExample le1 = new LockExample();
// :: error: (assignment.type.incompatible)
les1.locked = le1.locked;
// :: error: (assignment.type.incompatible)
les1.locked = le1.locked2;
// :: error: (assignment.type.incompatible)
les1.locked = les2.locked;
}
}
class Class1 {
public final Object lock = new Object();
@GuardedBy("lock") MyClass m = new MyClass();
}
class Class2 {
public final Object lock = new Object();
@GuardedBy("lock") MyClass m = new MyClass();
void method(final Class1 a) {
final Object lock = new Object();
@GuardedBy("lock") MyClass local = new MyClass();
// :: error: (assignment.type.incompatible)
local = m;
// :: error: (lock.not.held)
local.field = new Object();
synchronized (lock) {
// :: error: (lock.not.held)
a.m.field = new Object();
}
synchronized (this.lock) {
// :: error: (lock.not.held)
a.m.field = new Object();
}
synchronized (a.lock) {
a.m.field = new Object();
}
synchronized (lock) {
local.field = new Object();
}
synchronized (this.lock) {
// :: error: (lock.not.held)
local.field = new Object();
}
synchronized (a.lock) {
// :: error: (lock.not.held)
local.field = new Object();
}
synchronized (lock) {
// :: error: (lock.not.held)
this.m.field = new Object();
// :: error: (lock.not.held)
m.field = new Object();
}
synchronized (this.lock) {
this.m.field = new Object();
m.field = new Object();
}
synchronized (a.lock) {
// :: error: (lock.not.held)
this.m.field = new Object();
// :: error: (lock.not.held)
m.field = new Object();
}
}
}
}
|
