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| author | Sylvain Henry <sylvain@haskus.fr> | 2019-12-17 15:02:51 +0100 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2019-12-19 11:16:17 -0500 |
| commit | 0c114c6599c1df93b208c5f2b1754523858d80ee (patch) | |
| tree | 3546bd29b114811f6e8a16e56986619803e60cc1 /testsuite/tests/profiling/should_run | |
| parent | fad866e028e577b55510a3f9a2faf26d6fdd7bce (diff) | |
| download | haskell-0c114c6599c1df93b208c5f2b1754523858d80ee.tar.gz | |
Handle large ARR_WORDS in heap census (fix #17572)
We can do a heap census with a non-profiling RTS. With a non-profiling
RTS we don't zero superfluous bytes of shrunk arrays hence a need to
handle the case specifically to avoid a crash.
Revert part of a586b33f8e8ad60b5c5ef3501c89e9b71794bbed
Diffstat (limited to 'testsuite/tests/profiling/should_run')
| -rw-r--r-- | testsuite/tests/profiling/should_run/T17572.hs | 16 | ||||
| -rw-r--r-- | testsuite/tests/profiling/should_run/T17572.stdout | 1 | ||||
| -rw-r--r-- | testsuite/tests/profiling/should_run/all.T | 2 |
3 files changed, 19 insertions, 0 deletions
diff --git a/testsuite/tests/profiling/should_run/T17572.hs b/testsuite/tests/profiling/should_run/T17572.hs new file mode 100644 index 0000000000..8c36b4cefb --- /dev/null +++ b/testsuite/tests/profiling/should_run/T17572.hs @@ -0,0 +1,16 @@ +{-# LANGUAGE UnboxedTuples, MagicHash, BlockArguments #-} + +import GHC.Exts +import GHC.Types + +doSomething :: Word -> IO Word +doSomething (W# x) = IO \s -> + case newByteArray# 7096# s of -- we need a large ByteArray# + (# s, mba #) -> case shrinkMutableByteArray# mba 7020# s of -- shrunk + s -> case unsafeFreezeByteArray# mba s of + (# s, ba #) -> (# s, W# (indexWordArray# ba 18#) #) + +main :: IO () +main = do + xs <- mapM doSomething [0..300000] -- we need enough elements (to trigger a GC maybe?) + print (length xs) diff --git a/testsuite/tests/profiling/should_run/T17572.stdout b/testsuite/tests/profiling/should_run/T17572.stdout new file mode 100644 index 0000000000..7b1239c6a5 --- /dev/null +++ b/testsuite/tests/profiling/should_run/T17572.stdout @@ -0,0 +1 @@ +300001 diff --git a/testsuite/tests/profiling/should_run/all.T b/testsuite/tests/profiling/should_run/all.T index b711055667..fe98517d96 100644 --- a/testsuite/tests/profiling/should_run/all.T +++ b/testsuite/tests/profiling/should_run/all.T @@ -149,3 +149,5 @@ test('T15897', run_timeout_multiplier(2), fragile(15467)], makefile_test, ['T15897']) + +test('T17572', [], compile_and_run, ['']) |