December 2004 - Glasgow-haskell-users

RE: runInteractiveProcess is broken
by Simon Marlow 18 May '05

18 May '05

I can't repeat this, it works here: *Main> test1 ExitSuccess *Main> test2 Just ExitSuccess (after changing /usr/bin/sleep to /bin/sleep). The only thing I can think of is that you somehow have a SIGCHLD handler that calls wait(), but I don't see where that can be happening. GHC doesn't have any other mechanism for calling wait(), so I don't understand how the zombies are disappearing before waitForProcess is called. Maybe run it through strace and send us the output? Cheers, Simon On 26 October 2004 19:00, Peter Simons wrote: > Neither of these functions returns the return code of the > external process as promised: > > import System.IO hiding ( catch, try ) > import System.Process > import Control.Concurrent > > sleep :: Int -> IO () > sleep n = threadDelay (abs(n) * 1000000) > > test1 :: IO () > test1 = do > (_,_,_, pid) <- runInteractiveProcess "/usr/bin/sleep" ["1"] > Nothing Nothing sleep 5 > rc <- waitForProcess pid > print rc > > -- *Main> test1 > -- *** Exception: waitForProcess: does not exist (No child > processes) > > test2 :: IO () > test2 = do > (_,_,_, pid) <- runInteractiveProcess "/usr/bin/sleep" ["1"] > Nothing Nothing sleep 5 > rc <- getProcessExitCode pid > print rc > > -- *Main> test2 > -- Nothing > > I'm using the ghc from CVS-HEAD on Linux/x86. > > Peter > > _______________________________________________ > Glasgow-haskell-users mailing list > Glasgow-haskell-users(a)haskell.org > http://www.haskell.org/mailman/listinfo/glasgow-haskell-users

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RE: Dynamic loading problem
by Simon Marlow 19 Feb '05

19 Feb '05

On 30 April 2004 11:26, Duncan Coutts wrote: > Could someone remind me what the remaining issues are in getting ghc > to build Haskell modules/packaged into unix .so shared libraries? > > As I recall it seems to nearly work. Andre Pang got them to load and > function but it was a bit fragile and the rts would complain after a > short while: > http://www.mail-archive.com/glasgow-haskell-users@haskell.org/msg03923.h tml It might be possible to do this, but only if you want to do dlopen()-style linking at runtime. Linking a haskell binary against Haskell .so libraries still isn't possible - I had another look at this recently, and although one of the obstacles has been removed, there are others (details available on request). Any remaining issues to do with dlopen()ing a Haskell .so library are probably to do with CAFs. The dynamically loaded code needs to call newDynCAF() instead of newCAF() in a CAF's entry code - this is normally arranged by the RTS linker, but for a .so you'll have to do it some other way, like getting the compiler to emit the different call, or doing some CPP magic (but only for -fvia-C). Any reasonable patches to implement this will be incorporated. Oh, and strictly speaking we should run the __stginit_Foo() function from each dynamically loaded module. But the RTS linker still doesn't do this. Cheers, Simon

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RE: internal error: weird activation record found on stack: 9
by Simon Marlow 05 Jan '05

05 Jan '05

On 16 December 2004 16:12, Peter Simons wrote: > I'm getting this error in my software every now and then: > > postmaster: internal error: scavenge_stack: weird activation record > found on stack: 9 Please report this as a bug to > glasgow-haskell-bugs(a)haskell.org, or > http://www.sourceforge.net/projects/ghc/ > > The process runs just fine for several days, and then it > crashes with this message out of the sudden. There is no > apparent cause. I'm using a fairly recent CVS ghc to compile > the program on Linux/x86. > > Any idea what I can do to help tracking this bug down? Please compile the program with -debug, then open it with gdb. Set a breakpoint on barf() and run the program: gdb> break barf gdb> run and wait for it to hit the breakpoint. Then do gdb> signal SIGABRT to get a core dump. Send the source, binary, and core dump to us. With any luck, we'll be able to track it down without running the program. Cheers, Simon

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dummy variables
by Serge D. Mechveliani 30 Dec '04

30 Dec '04

Dear Haskellers, dear GHC team, Is a variable `_x' equivalent to `_' ? I discover that ghc-6.2.2 assigns a value to _rem in the program f :: Int f = let (q, _rem ) = quotRem 5 2 (q', _rem') = quotRem 7 4 in _rem + _rem' I got used to write the programs like let (x, _remainder ) = ... (y, _remainder') = ... in x + y using _remainder as a self-commenting dummy variable. Because it is a better commentary than `_'. And now, it occurs that these are the variables taking values! And removing the quote suffix from _remainder' even leads to the report of "conflicting definitions". Does really Haskell mean this? It this reasonable? How to set self-commenting dummy variables? Or, maybe, it is a GHC bug? Thank you in advance for the explanation. ----------------- Serge Mechveliani mechvel(a)botik.ru

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Emitting java bytecode?
by Tomasz Zielonka 29 Dec '04

29 Dec '04

Hello! Would be possible for GHC to emit Java bytecode? There seems to be some code in GHC's sources (in ghc/compiler/javaGen/) suggesting that it was anticipated. I suppose most of the work would be in making a java RTS and libraries. I am mainly interested in making GHC more portable. Haskell is a great application programming language, but there are some concerns about portability of applications. Perhaps I shouldn't be looking at java bytecode for a solution... Is it possible that a C-- backend will make GHC more portable? Best regards, Tomasz

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Error building GHC: can't locate import `Package'
by Peter Simons 27 Dec '04

27 Dec '04

When building the current CVS HEAD with ghc-6.2.2 on Linux/x86, I get this error: [...] ==fptools== make boot - --no-print-directory -r; in /usr/local/src/ghc-current/ghc/utils/ghc-pkg -------------------------------------------------------------------- Creating Version.hs ... ghc-6.2.2 -M -optdep-f -optdep.depend -osuf o -optdep--exclude-module=Compat.RawSystem -optdep--exclude-module=Compat.Directory -optdep--exclude-module=Distribution.Compat.Error -optdep--exclude-module=Distribution.Compat.ReadP -optdep--exclude-module=Distribution.Extension -optdep--exclude-module=Distribution.InstalledPackageInfo -optdep--exclude-module=Distribution.License -optdep--exclude-module=Distribution.Package -optdep--exclude-module=Distribution.ParseUtils -optdep--exclude-module=Distribution.Setup -optdep--exclude-module=Distribution.Version -optdep--exclude-module=System.FilePath -H16m -O -optc-nopie -optc-fno-stack-protector-all -optc-fno-stack-protector -cpp -Wall -fno-warn-name-shadowing -fno-warn-unused-matches -i../../lib/compat Main.hs ParsePkgConfLite.hs Version.hs ParsePkgConfLite.hs: can't locate import `Package' It seems that ParsePkgConfLite.hs omits the "Distribution" part when importing Distribution.Package. Peter

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Re: ghc for hp-ux 11.11...
by amyhr＠spymac.com 22 Dec '04

22 Dec '04

Okay, I've tried to follow the directions, and ran into a couple minor issues I was able to work through, but I got stuck at the "cd H/libraries && make boot && make" stage. The host system is redhat enterprise linux 3, the target is hp-ux 11.11, the output is below: /var/tmp/work/ghc-6.2.2/libraries 1030 $ make boot && make ------------------------------------------------------------------------ ===fptools== Recursively making `boot' in base haskell98 haskell-src network parsec QuickCheck readline unix ... PWD = /var/tmp/work/ghc-6.2.2/libraries ------------------------------------------------------------------------ ------------------------------------------------------------------------ ==fptools== make boot -r; in /var/tmp/work/ghc-6.2.2/libraries/base ------------------------------------------------------------------------ ../../ghc/utils/hsc2hs/hsc2hs-inplace -Iinclude -I../../ghc/includes -I. System/CPUTime.hsc In file included from /var/tmp/work/ghc-6.2.2/ghc/includes/HsFFI.h:21, from /var/tmp/work/ghc-6.2.2/ghc/utils/hsc2hs/template-hsc.h:4, from System/CPUTime_hsc_make.c:1: /var/tmp/work/ghc-6.2.2/ghc/includes/config.h:12:14: warning: ISO C requires whitespace after the macro name /var/tmp/work/ghc-6.2.2/ghc/includes/config.h:13:14: warning: ISO C requires whitespace after the macro name /var/tmp/work/ghc-6.2.2/ghc/includes/config.h:13:1: warning: "hppa2" redefined /var/tmp/work/ghc-6.2.2/ghc/includes/config.h:12:1: warning: this is the location of the previous definition /var/tmp/work/ghc-6.2.2/ghc/includes/config.h:14:14: warning: ISO C requires whitespace after the macro name /var/tmp/work/ghc-6.2.2/ghc/includes/config.h:14:1: warning: "hppa2" redefined /var/tmp/work/ghc-6.2.2/ghc/includes/config.h:13:1: warning: this is the location of the previous definition In file included from CPUTime.hsc:33: include/HsBase.h:64:26: sys/timers.h: No such file or directory include/HsBase.h:98:1: warning: "HAVE_GETRUSAGE" redefined In file included from /var/tmp/work/ghc-6.2.2/ghc/includes/HsFFI.h:21, from /var/tmp/work/ghc-6.2.2/ghc/utils/hsc2hs/template-hsc.h:4, from System/CPUTime_hsc_make.c:1: /var/tmp/work/ghc-6.2.2/ghc/includes/config.h:494:1: warning: this is the location of the previous definition make[1]: *** [System/CPUTime.hs] Error 1 make: *** [boot] Error 1 On Mon Dec 20 17:38 , dons(a)cse.unsw.edu.au (Donald Bruce Stewart) sent: >amyhr: >> Is it possible? Is there anyone out there who's done it and could provide advice >> or binaries? > >It should be possible. You'll have to follow the instructions from the >porting guide: > http://www.haskell.org/ghc/docs/latest/html/building/sec-porting-ghc.html > >When you run in to problems, ask on #haskell or this list. > >Good luck, > Don

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RE: CVS HEAD ghc fails with "Panic!"
by Simon Peyton-Jones 21 Dec '04

21 Dec '04

I reckon I've fixed this, at last. Simon | -----Original Message----- | From: glasgow-haskell-users-bounces(a)haskell.org [mailto:glasgow-haskell-users- | bounces(a)haskell.org] On Behalf Of Peter Simons | Sent: 20 October 2004 17:10 | To: glasgow-haskell-users(a)haskell.org | Subject: CVS HEAD ghc fails with "Panic!" | | Hi, | | the GHC version from the current CVS HEAD aborts with an | internal error when doing this: | | $ darcs get http://cryp.to/hsemail | $ cd hsemail | $ ghc -O2 --make -o message-test message-test.hs | | Chasing modules from: message-test.hs | | Compiling Rfc2234 ( ./Rfc2234.hs, ./Rfc2234.o ) | | ghc-6.3: panic! (the `impossible' happened, GHC version 6.3): | | app_match: unbound tpl c{tv a1a9} | | Compiling with -O instead of -O2 works, though. | | Peter | | _______________________________________________ | Glasgow-haskell-users mailing list | Glasgow-haskell-users(a)haskell.org | http://www.haskell.org/mailman/listinfo/glasgow-haskell-users

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ghc for hp-ux 11.11...
by amyhr＠spymac.com 21 Dec '04

21 Dec '04

Is it possible? Is there anyone out there who's done it and could provide advice or binaries?

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[ ghc-Feature Requests-1088694 ] hp-ux 11.11 binaries
by SourceForge.net 21 Dec '04

21 Dec '04

Feature Requests item #1088694, was opened at 2004-12-20 16:20 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=358032&aid=1088694&group_… Category: None Group: None Status: Open Priority: 5 Submitted By: Andy MyHR (amyhr) Assigned to: Nobody/Anonymous (nobody) Summary: hp-ux 11.11 binaries Initial Comment: Looks like there hasn't been a binary dist for ghc in a very long time, any chance we could see one soon? ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=358032&aid=1088694&group_…

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