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Commit | Line | Data |
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1b1a35ee XL |
1 | use super::*; |
2 | use crate::panic::{RefUnwindSafe, UnwindSafe}; | |
136023e0 | 3 | use crate::sync::mpsc::sync_channel; |
1b1a35ee XL |
4 | use crate::thread; |
5 | ||
6 | #[test] | |
7 | fn stdout_unwind_safe() { | |
8 | assert_unwind_safe::<Stdout>(); | |
9 | } | |
10 | #[test] | |
11 | fn stdoutlock_unwind_safe() { | |
12 | assert_unwind_safe::<StdoutLock<'_>>(); | |
13 | assert_unwind_safe::<StdoutLock<'static>>(); | |
14 | } | |
15 | #[test] | |
16 | fn stderr_unwind_safe() { | |
17 | assert_unwind_safe::<Stderr>(); | |
18 | } | |
19 | #[test] | |
20 | fn stderrlock_unwind_safe() { | |
21 | assert_unwind_safe::<StderrLock<'_>>(); | |
22 | assert_unwind_safe::<StderrLock<'static>>(); | |
23 | } | |
24 | ||
25 | fn assert_unwind_safe<T: UnwindSafe + RefUnwindSafe>() {} | |
26 | ||
27 | #[test] | |
28 | #[cfg_attr(target_os = "emscripten", ignore)] | |
29 | fn panic_doesnt_poison() { | |
30 | thread::spawn(|| { | |
31 | let _a = stdin(); | |
32 | let _a = _a.lock(); | |
33 | let _a = stdout(); | |
34 | let _a = _a.lock(); | |
35 | let _a = stderr(); | |
36 | let _a = _a.lock(); | |
37 | panic!(); | |
38 | }) | |
39 | .join() | |
40 | .unwrap_err(); | |
41 | ||
42 | let _a = stdin(); | |
43 | let _a = _a.lock(); | |
44 | let _a = stdout(); | |
45 | let _a = _a.lock(); | |
46 | let _a = stderr(); | |
47 | let _a = _a.lock(); | |
48 | } | |
136023e0 XL |
49 | |
50 | #[test] | |
51 | #[cfg_attr(target_os = "emscripten", ignore)] | |
52 | fn test_lock_stderr() { | |
53 | test_lock(stderr, stderr_locked); | |
54 | } | |
55 | #[test] | |
56 | #[cfg_attr(target_os = "emscripten", ignore)] | |
57 | fn test_lock_stdin() { | |
58 | test_lock(stdin, stdin_locked); | |
59 | } | |
60 | #[test] | |
61 | #[cfg_attr(target_os = "emscripten", ignore)] | |
62 | fn test_lock_stdout() { | |
63 | test_lock(stdout, stdout_locked); | |
64 | } | |
65 | ||
66 | // Helper trait to make lock testing function generic. | |
67 | trait Stdio<'a>: 'static | |
68 | where | |
69 | Self::Lock: 'a, | |
70 | { | |
71 | type Lock; | |
72 | fn lock(&'a self) -> Self::Lock; | |
73 | } | |
74 | impl<'a> Stdio<'a> for Stderr { | |
75 | type Lock = StderrLock<'a>; | |
76 | fn lock(&'a self) -> StderrLock<'a> { | |
77 | self.lock() | |
78 | } | |
79 | } | |
80 | impl<'a> Stdio<'a> for Stdin { | |
81 | type Lock = StdinLock<'a>; | |
82 | fn lock(&'a self) -> StdinLock<'a> { | |
83 | self.lock() | |
84 | } | |
85 | } | |
86 | impl<'a> Stdio<'a> for Stdout { | |
87 | type Lock = StdoutLock<'a>; | |
88 | fn lock(&'a self) -> StdoutLock<'a> { | |
89 | self.lock() | |
90 | } | |
91 | } | |
92 | ||
93 | // Helper trait to make lock testing function generic. | |
94 | trait StdioOwnedLock: 'static {} | |
95 | impl StdioOwnedLock for StderrLock<'static> {} | |
96 | impl StdioOwnedLock for StdinLock<'static> {} | |
97 | impl StdioOwnedLock for StdoutLock<'static> {} | |
98 | ||
99 | // Tests locking on stdio handles by starting two threads and checking that | |
100 | // they block each other appropriately. | |
101 | fn test_lock<T, U>(get_handle: fn() -> T, get_locked: fn() -> U) | |
102 | where | |
103 | T: for<'a> Stdio<'a>, | |
104 | U: StdioOwnedLock, | |
105 | { | |
106 | // State enum to track different phases of the test, primarily when | |
107 | // each lock is acquired and released. | |
108 | #[derive(Debug, PartialEq)] | |
109 | enum State { | |
110 | Start1, | |
111 | Acquire1, | |
112 | Start2, | |
113 | Release1, | |
114 | Acquire2, | |
115 | Release2, | |
116 | } | |
117 | use State::*; | |
118 | // Logging vector to be checked to make sure lock acquisitions and | |
119 | // releases happened in the correct order. | |
120 | let log = Arc::new(Mutex::new(Vec::new())); | |
121 | let ((tx1, rx1), (tx2, rx2)) = (sync_channel(0), sync_channel(0)); | |
122 | let th1 = { | |
123 | let (log, tx) = (Arc::clone(&log), tx1); | |
124 | thread::spawn(move || { | |
125 | log.lock().unwrap().push(Start1); | |
126 | let handle = get_handle(); | |
127 | { | |
128 | let locked = handle.lock(); | |
129 | log.lock().unwrap().push(Acquire1); | |
130 | tx.send(Acquire1).unwrap(); // notify of acquisition | |
131 | tx.send(Release1).unwrap(); // wait for release command | |
132 | log.lock().unwrap().push(Release1); | |
133 | } | |
134 | tx.send(Acquire1).unwrap(); // wait for th2 acquire | |
135 | { | |
136 | let locked = handle.lock(); | |
137 | log.lock().unwrap().push(Acquire1); | |
138 | } | |
139 | log.lock().unwrap().push(Release1); | |
140 | }) | |
141 | }; | |
142 | let th2 = { | |
143 | let (log, tx) = (Arc::clone(&log), tx2); | |
144 | thread::spawn(move || { | |
145 | tx.send(Start2).unwrap(); // wait for start command | |
146 | let locked = get_locked(); | |
147 | log.lock().unwrap().push(Acquire2); | |
148 | tx.send(Acquire2).unwrap(); // notify of acquisition | |
149 | tx.send(Release2).unwrap(); // wait for release command | |
150 | log.lock().unwrap().push(Release2); | |
151 | }) | |
152 | }; | |
153 | assert_eq!(rx1.recv().unwrap(), Acquire1); // wait for th1 acquire | |
154 | log.lock().unwrap().push(Start2); | |
155 | assert_eq!(rx2.recv().unwrap(), Start2); // block th2 | |
156 | assert_eq!(rx1.recv().unwrap(), Release1); // release th1 | |
157 | assert_eq!(rx2.recv().unwrap(), Acquire2); // wait for th2 acquire | |
158 | assert_eq!(rx1.recv().unwrap(), Acquire1); // block th1 | |
159 | assert_eq!(rx2.recv().unwrap(), Release2); // release th2 | |
160 | th2.join().unwrap(); | |
161 | th1.join().unwrap(); | |
162 | assert_eq!( | |
163 | *log.lock().unwrap(), | |
164 | [Start1, Acquire1, Start2, Release1, Acquire2, Release2, Acquire1, Release1] | |
165 | ); | |
166 | } |