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author | David Terei <davidterei@gmail.com> | 2011-07-20 11:09:03 -0700 |
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committer | David Terei <davidterei@gmail.com> | 2011-07-20 11:26:35 -0700 |
commit | 16514f272fb42af6e9c7674a9bd6c9dce369231f (patch) | |
tree | e4f332b45fe65e2a7a2451be5674f887b42bf199 /testsuite/tests/ffi/should_run/1679.hs | |
parent | ebd422aed41048476aa61dd4c520d43becd78682 (diff) | |
download | haskell-16514f272fb42af6e9c7674a9bd6c9dce369231f.tar.gz |
Move tests from tests/ghc-regress/* to just tests/*
Diffstat (limited to 'testsuite/tests/ffi/should_run/1679.hs')
-rw-r--r-- | testsuite/tests/ffi/should_run/1679.hs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/testsuite/tests/ffi/should_run/1679.hs b/testsuite/tests/ffi/should_run/1679.hs new file mode 100644 index 0000000000..15f8630004 --- /dev/null +++ b/testsuite/tests/ffi/should_run/1679.hs @@ -0,0 +1,19 @@ +{-# LANGUAGE ForeignFunctionInterface #-} +import System.Mem +import Foreign +import Control.Exception + +-- Test for #1679. If there's a GC during a foreign call, the +-- interpreter could sometimes crash, because it was using the old +-- pointer to the byte code instructions, which has now moved. The +-- tricky bit is allocating enough so that the old instructions are +-- overwritten, hence performGC followed by sum [1..100000]. + +foreign import ccall "wrapper" mkF :: IO () -> IO (FunPtr (IO ())) +foreign import ccall "dynamic" call_F :: FunPtr (IO ()) -> IO () + +main = do + fun <- mkF (do performGC + print (sum [1..100000])) + call_F fun + putStrLn "ok" |