Hugs on Windows, FFI
Brian Smith <[email protected]>
| Newsgroups | gmane.comp.lang.haskell.cvs.hugs |
|---|---|
| Message-ID | <[email protected]> |
On 9/9/05, Neil Mitchell <[email protected]> wrote: > > Hi, > > Running "make check" I get the following, dropping most of the > begining since it seems sensible enough. Apparently this should show > if FFI works on Windows? I noticed that your test results didn't include failures for Sparc.hs/Callback.hs/Sin.hs. After more investigation, I found that these tests only fail when Windows Data Execution Prevention (DEP) [1] is enabled. When I disable DEP for hugs.exe, these tests pass; when I enabled DEP then the tests fail. So, apparently the code that builds the thunks used for callbacks does not correctly set the executable/non-writable flags on the thunk after it is created. There was a very similar bug in GHCi/runghc that was fixed just a few weeks ago. I think the solution to this problem is probably simple for somebody familiar with the GHCi solution, or somebody familiar with the Windows memory management API's. But, failing a fix, we should at least note this problem in the release notes, and the installer should automatically disable DEP for hugs.exe, runhugs.exe, and WinHugs.exe. [1] http://support.microsoft.com/kb/875352 - Brian _______________________________________________ Cvs-hugs mailing list [email protected] http://www.haskell.org/mailman/listinfo/cvs-hugs