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1199 discussions

Is there an exit-hook function in abcl?
by Ice Rove 19 Oct '16

19 Oct '16

Is there some way to add a exit-hook function to abcl so when quit abcl, these functions will be called automatically? Just like sbcl's *exit-hooks*. If not, can I help to add one?

2 1

Assorted patches
by Olof-Joachim Frahm 15 Oct '16

15 Oct '16

Hi list, attached are some patches (from [1]) that have been sitting around for a while; one is more of a work in progress, but it would still be great to know if it's at least going in the right direction. - 0001 Fixes an annoying issue I had where imported nested classes (with the dollar sign in their name) weren't found via JSS. - 0002 Adds the `external-only` option as seen in SBCL to `apropos`, because it's convenient. - 0005 Adds support for setting the `file-position` on `string-output-stream`s. Might be somewhat obscure, but I stumbled upon it in some situation. The next one could use some comments as well, but I consider it pretty well working: - 0003 Adds a hook and simple machinery to support multiple internal disassembler backends. At the moment I've added the ObjectWeb ASM one and kept the existing JAD call. Should this somehow add an ASDF system to support loading of those libraries via Maven? At the moment a user has to have the matching JARs in their classpath for it to work. Now the one that is not nearly done is 0004 which attempts to fix some of the issues with `jnew-runtime-class`, in particular working custom constructors. Now I've noticed that that's a *big* topic, so this is just a starting point. I'm deliberating ways of supporting a direct `super` call too, that includes fixing the supermethod calls that are still in the code. Let me know what you think, best regards, Olof [1]: https://github.com/Ferada/abcl/tree/patch-submissions

3 5

Automating install on Linux and Mac
by Robert Goldman 10 Oct '16

10 Oct '16

I was reading over the install instructions, and since I have to install ABCL on multiple platforms, I thought I would automate the process (at least for Mac and Linux). The approach I have taken requires the use of "stow", to get all the bits of ABCL where you want them, and critically automates getting the paths right. Attached please find (1) a Makefile that automates the construction of the "abcl" executable script, the abcl rlwrap completions, and the installation in preparation for the use of "stow". (2) an "abcl_template" file that the makefile will modify so that it can find completions and jar files (both the main one and the contrib). (3) an abcl_completions.lisp file that writes the completions. Adding them to the abcl-1.4.0 directory from the tarballs lets you do this: make prepare-install sudo make install cd /usr/local/stow sudo stow abcl Cheers, r

2 2

run-program patch / better UIOP support
by Olof-Joachim Frahm 07 Sep '16

07 Sep '16

Hi again, after Elias mentioned his work on UIOP I've produced a small patch that improves compatibility with regards to process spawning quite a bit, see attached (or from [1]). Missing is the option to pass in custom streams (which some other implementations support), as that's quite a bit more work with the `ProcessBuilder` interface and would require shuffling data back and forth in a separate thread perhaps. For Windows compatibility (for `process-pid`) I'm a bit stumped how that'd work with standard Java, thus it's currently unsupported. Best regards, Olof [1]: https://github.com/Ferada/abcl/tree/run-more-programs

2 1

IO bug
by Vibhu Mohindra 04 Sep '16

04 Sep '16

Hallo, I've got a file open for IO. Only writing to it works okay. But if I also try to read from it, then things start going wrong. I've attached a test case that should return NIL but instead raises an error in ABCL (1.3.3, on OSX). The problem is with the call to #'write-sequence on line 21. In fact, from some other tests, I believe that replacing that call to #'write-sequence with a call to a function that does the same thing but by repeatedly setting the file-position and writing a byte, for each byte in the sequence, fixes things. That means something about #'write-sequence is broken. Maybe I misunderstand the file level functions in Common Lisp, and my test doesn't use them correctly. However, the test passes in: CLISP, CCL, CMUCL, SBCL, ECL. So I thought I'd report this, just in case it is a bug in ABCL. Also, removing the last three lines of code in #'main, which read one byte, makes the test run without errors. Vibhu

3 6

Moved to github?
by Robert P. Goldman 03 Sep '16

03 Sep '16

I see that there are now active github repositories for ABCL. But the common-lisp.net homepage for ABCL still suggests that we get ABCL source from SVN. Should this be changed? thx, r

4 4

defgeneric, defmethod, and incongruent lambda list... bug?
by Paul Nathan 09 Aug '16

09 Aug '16

Hi, I have a generic function (defgeneric equals (a b &rest keys &key recursive key &allow-other-keys) ... ) This method works correctly: (defmethod equals ((a t) (b t) &rest keys) (declare (ignore keys)) (equalp a b)) ... ) But, this method throws an error: (defmethod equals ((a float) (b float) &rest keys &key floating-compare (max-relative-diff 1.19e-7)) ... ) My understanding from http://www.lispworks.com/documentation/HyperSpec/Body/07_fd.htm is that since &allow-other-keys has been set, this should work. As a point of reference, SBCL allows this, but of course that is not the determinant of correctness. :-) Best regards, Paul

1 0

errors in threads corrupt terminal IO
by Vibhu Mohindra 04 Aug '16

04 Aug '16

Hi, Is anyone aware of any reasons not to use threads in a production ABCL program? I'm preparing to deliver a program mostly written in Lisp, with a layer of Java on top so Java programmers can interact with it. The Lisp code runs a handful of daemon threads, some of which are lparallel worker threads. I'm specifically wondering whether errors raised inside threads will corrupt any of ABCL's internal state. e.g. in an ABCL REPL, this corrupts the terminal: (ql:quickload "bordeaux-threads") (use-package "BORDEAUX-THREADS") (make-thread #'(lambda () (error "testing"))) ;now press "enter" a couple of times. It's as though multiple threads are trying to read from the terminal, not just write. My program doesn't have a REPL, so if this is only a REPL problem, that's okay. I'm wondering if it's something bigger. If anyone on this list has used threads, and found any sort of instability because of them, I'd love to know. I'll then rewrite my program to not use threads. Thanks in advance, Vibhu ---- abcl-1.3.2 on OSX bordeaux-threads-0.8.3 ----

1 0

#'directory likely bug
by Vibhu Mohindra 01 Jul '16

01 Jul '16

In a directory containing files and directories, (directory (make-pathname :directory '(:relative :wild))) lists only the directories, in CCL, SBCL, CLISP, ECL, but in ABCL (1.3.2) produces this error: #<THREAD "interpreter" {71225B71}>: Debugger invoked on condition of type TYPE-ERROR The value NIL is not of type (OR PATHNAME STRING FILE-STREAM SYSTEM:JAR-STREAM SYSTEM:URL-STREAM). This is triggered by the existence of a file in OSX named ./.android/adbkey , or in general by the existence of: $ mkdir .d1 $ touch .d1/f1 [CMUCL seems wrong. It lists contents of subdirectories of current directory (but not their subdirectories).] Vibhu

1 0

ABCL and Truffle
by Alessio Stalla 24 Jun '16

24 Jun '16

Hi list, is anyone aware of Truffle/Graal from Oracle? Here some insightful slides: https://lafo.ssw.uni-linz.ac.at/pub/papers/2016_PLDI_Truffle.pdf Since there's been talk about rewriting the ABCL compiler which is old, messy and not very optimizing, I wonder if Truffle can be a useful technology to base a new compiler on. Not as the default because it requires Java 9 (or perhaps 8), but at least as a future-proof solution. It seems to me that getting started is not hard - just map the Lisp S-expression based AST to a Truffle AST; optimizations can follow incrementally. What do you think? I don't have the resources to work on it anytime soon, I'm letting my own projects slip sadly - it would be great to work on it. Still, maybe someone else is interested. I can contribute some design and code reviews, if need be, but little actual coding. Peace Alessio

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