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Diffstat (limited to 'testsuite/tests/concurrent/should_run/conc016.hs')
| -rw-r--r-- | testsuite/tests/concurrent/should_run/conc016.hs | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/testsuite/tests/concurrent/should_run/conc016.hs b/testsuite/tests/concurrent/should_run/conc016.hs new file mode 100644 index 0000000000..639b4306b3 --- /dev/null +++ b/testsuite/tests/concurrent/should_run/conc016.hs @@ -0,0 +1,27 @@ +import Control.Concurrent +import Control.Exception + +-- check that we can still kill a thread that is blocked on +-- delivering an exception to us. + +-- NB. this test is non-deterministic in the threaded2 way since 6.14, +-- because throwTo is now always interruptible, so the main thread's +-- killThread can be legitimately interrupted by the child thread's +-- killThread, rather than the other way around. This happens because +-- the child thread is running on another processor, so the main +-- thread's throwTo is blocked waiting for a response, and while +-- waiting it is interruptible. + +main = do + main_thread <- myThreadId + m <- newEmptyMVar + sub_thread <- forkIO (do + takeMVar m + throwTo main_thread (ErrorCall "foo") + ) + mask_ $ do + putMVar m () + sum [1..10000] `seq` -- to be sure the other thread is now blocked + killThread sub_thread + + putStrLn "ok" |