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2015-09-01T16:54:04Z Xof writes some lisp code
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2015-09-01T19:01:33Z Xof:    143806: SB-FASL::FOP-PUSH[04] (78)
2015-09-01T19:01:33Z Xof: -  143808: SB-FASL::FOP-BYTE-INTEGER[23] 14
2015-09-01T19:01:33Z Xof: +  143808: SB-FASL::FOP-BYTE-INTEGER[23] 23
2015-09-01T19:01:33Z Xof:    143810: SB-FASL::FOP-BYTE-INTEGER[23] 41
2015-09-01T19:01:43Z Xof: not completely convinced that this is helping
2015-09-01T19:02:55Z stassats: what part is that? debug info?
2015-09-01T19:08:40Z Xof: I wish I knew
2015-09-01T19:08:47Z Xof: there aren't very many landmarks
2015-09-01T19:09:11Z Xof: I know that this is related to the #.(loop ...) form in src/compiler/seqtran.lisp (which looks ultra-weird)
2015-09-01T19:10:12Z Xof: but I don't really understand a mechanism for differences resulting from that
2015-09-01T19:10:34Z Xof: except that the differences started appearing when we started doing more source locations from backquotes, so... maybe?
2015-09-01T19:11:08Z Xof: my cunning plan is likely to be to rewrite that without read-time evaluation
2015-09-01T19:11:23Z stassats: but backqoute is done by sbcl code
2015-09-01T19:11:30Z Xof: yes
2015-09-01T19:11:33Z Xof: I know
2015-09-01T19:11:56Z stassats: and there shouldn't be any backqoute in the result
2015-09-01T19:12:45Z stassats: and we had source locations from backqoute before, it just got broken
2015-09-01T19:13:14Z Xof: but it's the host which handles #., right?
2015-09-01T19:13:36Z Xof: so if it sets up some new streams which confuse whatever it is that gets source locations...?
2015-09-01T19:13:40Z Xof: I don't know, I merely observe
2015-09-01T19:13:41Z Xof: and guess
2015-09-01T19:14:02Z stassats: that would be quite weird
2015-09-01T19:15:09Z stassats: but yes, source locating constructed forms like isn't going to be easy
2015-09-01T19:16:51Z stassats: maybe the host does some coalescing?
2015-09-01T19:17:32Z stassats: hmmm
2015-09-01T19:17:34Z Xof: another clisp/sbcl difference
2015-09-01T19:17:45Z stassats: isn't sbcl makes less copies for backqoute?
2015-09-01T19:17:50Z Xof: appears to be from the macrolet ((def  in src/compiler/x86/call.lisp
2015-09-01T19:18:14Z Xof: stassats: yes, but at this point it's all sbcl's backquote, isn't it?
2015-09-01T19:18:32Z stassats: ok, right
2015-09-01T19:18:39Z Xof: but yes, there have been source code coalescing bugs before
2015-09-01T19:19:30Z Xof: the way to fix them is actually to make sure that the structure is shared in all cases
2015-09-01T19:19:56Z Xof: but I have no idea why this should pop up now
2015-09-01T19:20:00Z Xof: (or rather last month)
2015-09-01T19:20:47Z stassats: maybe it's something SB-C::FROB-BASH-TRANSFORM does
2015-09-01T19:21:09Z stassats: ok, it's not done at macro-time
2015-09-01T19:21:15Z stassats: or #. time
2015-09-01T19:21:28Z Xof: -  142770: SB-FASL::FOP-BYTE-INTEGER[23] 35
2015-09-01T19:21:28Z Xof: +  142770: SB-FASL::FOP-BYTE-INTEGER[23] 34
2015-09-01T19:22:12Z Xof: #.
2015-09-01T19:22:12Z Xof: (collect ((forms))
2015-09-01T19:22:20Z Xof is suspicious
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2015-09-01T19:22:28Z Xof: src/code/numbers.lisp
2015-09-01T19:22:59Z stassats: well, things are sorted
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2015-09-01T19:24:22Z stassats: but there's a lot of sharing
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2015-09-01T19:25:09Z stassats: in the bash transforms too, the lambda-list is shared
2015-09-01T19:28:51Z Xof: yeah
2015-09-01T19:29:06Z Xof: well, explicit sharing is fine
2015-09-01T19:29:19Z Xof: it's identical structure without explicit sharing that I think is problematic
2015-09-01T19:30:40Z Xof: e.g. git diff cd43affac80f056271d88b0fa38b8115494efc4c{^,}
2015-09-01T19:33:33Z stassats: can coalescence happen at read-time?
2015-09-01T19:33:44Z Xof: I suppose in principle yes
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2015-09-01T19:59:27Z Xof: thinking aloud
2015-09-01T19:59:37Z Xof: the src/compiler/x86/call difference is interesting
2015-09-01T19:59:59Z Xof: it looks like some internal structure gets mutated
2015-09-01T20:00:12Z Xof: something which is a value which I understand in one call becomes NIL in the following call
2015-09-01T20:02:24Z Xof: but only in clisp xc, not ccl or sbcl itself
2015-09-01T20:03:07Z stassats: clisp has some different treatment of load-time-value
2015-09-01T20:04:12Z Xof: this is the scs slot in the operand-parse structure
2015-09-01T20:09:36Z Xof: ah no wait
2015-09-01T20:09:37Z Xof: -  247553: SB-FASL::FOP-PUSH[05] (3963)
2015-09-01T20:09:37Z Xof: -  247556: SB-FASL::FOP-STRUCTSET[CC] [3965] 7
2015-09-01T20:09:49Z Xof: this is a circularity / sharing thing
2015-09-01T20:11:21Z Xof: in one case, the sharing happens straight away; in the other, the slot is initialized to NIL and then set to the shared value
2015-09-01T20:12:02Z Xof: though, again, given that backquote is meant to be ours I'm not sure I understand where the difference is coming from
2015-09-01T20:13:29Z Xof: however.  That has an easy enough potential fix; testing...
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2015-09-01T20:52:48Z Xof: "potential" but not actual
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2015-09-02T10:56:39Z Xof: oh *great*
2015-09-02T10:56:52Z Xof: the change that can only possibly have fixed one of the three host leaks appears to have fixed all the host leaks
2015-09-02T10:57:33Z Xof: stupid phase-of-the-moon thing
2015-09-02T10:58:04Z flip214: can you do that with other bugs, too? 3-in-1 fixes, or even better ratios, too?
2015-09-02T10:58:22Z Xof: ah, no, I have an alternate hypothesis
2015-09-02T10:58:30Z Xof: my script for building is broken
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2015-09-02T11:02:38Z flip214: with p<0.05, right? ;P
2015-09-02T11:02:41Z Xof starts again
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2015-09-02T11:26:49Z Xof: substantially more broken than that :-)
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2015-09-02T17:52:23Z alpha-: hi
2015-09-02T17:52:32Z alpha-: what is wrong with sbcl website?
2015-09-02T17:52:48Z stassats: nothing
2015-09-02T17:52:58Z alpha-: it does not resolve for me
2015-09-02T17:55:15Z alpha-: can anyone open www.sbcl.org ?
2015-09-02T17:56:02Z stassats: the dns is off
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2015-09-02T20:47:29Z akkad flips the switch to turn it back on
2015-09-02T20:47:55Z joshe: sounds like a good idea
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2015-09-02T21:07:30Z foom: who is b9.com?
2015-09-02T21:07:39Z stassats: kmr?
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2015-09-02T21:15:09Z foom: Did it get hijacked or something? the nameservers changed recently from ns.b9.com and ns2.b9.com to ns1.cnzzdns.com and ns2.cnzzdns.com. That seems suspicious, at least, at first glance.
2015-09-02T21:15:44Z foom: sbcl.org's registrar will do dns for you for free; whoever owns it should probably just use enom's dns service. :)
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2015-09-02T21:17:31Z joshe: most registrars will nowadays
2015-09-02T21:18:43Z foom: Indeed, not claiming it was a distinguishing characteristic, just that they are part of that "most", so it'd be easy.
2015-09-02T21:19:17Z joshe: right
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2015-09-02T22:53:41Z attila_lendvai is delighted to see an sbcl package installing on his new odroid xu4 (arm)
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2015-09-02T23:22:17Z dougk_: chandlerc: I can post this in the CL if you'd like: the "related issue" is that whether the files end in '.s' or '.S' is irrelevant to Myriad because their files end in '.asm', so *something* has to change to allow that.
2015-09-02T23:22:54Z dougk_: but if you make '.asm' equivalent to '.s' which is technically correct (per clang), it just does nothing because blaze never compiles un-preprocessed asm source. It's just broken.
2015-09-02T23:23:58Z dougk_: so for pre-processed asm, it's slightly less broken in that you can actually compile '.S' files, except that myriad can't produce the artifact for a '.S' files that states the inclusions because moviAsm never does
2015-09-02T23:24:08Z dougk_: wrong room.
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2015-09-02T23:47:16Z rick-monster: Hi after talking to some guys on #lisp I came up with a totally dumb hack that seems to let me run realtime audio through sbcl via linux jack audio server at much lower latencies than I thought possible, even when the realtime sbcl thread is consing quite a bit.
2015-09-02T23:47:45Z rick-monster: so here is aforementioned dumb hack: http://paste.lisp.org/display/154685
2015-09-02T23:58:31Z rick-monster: so I am wondering whether there is any reason why this may be a bad idea?  I *have* seen the thing blow up after half an hour or so running trouble-free but on the scale of minutes it seems very stable...
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2015-09-03T00:31:44Z akkad: ooh netbsd-arm
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2015-09-03T01:25:49Z joshe: oh, you'll probably be able to test that easier than I can :)
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2015-09-03T03:31:34Z 
2015-09-03T03:31:35Z names: ccl-logbot les carvite psilord minion specbot selat ASau psy_ fiddlerwoaroof DeadTrickster dougk_ kanru zacts nicdev` DGASAU heddwch alchemis7 loke christop1 abbe jsnell_ Quadrescence dustinm` fikusz Intensity edgar-rft igajsin_m flip214 jeremyheiler Bike |3b| chris2 igajsin tmh_ jfe jdz White_Flame dsp_ yauz rj-code schjetne mood _iwc p_l fe[nl]ix antoszka drmeister jackc- luis akkad dim pootler chu frankS2 jlarocco aeth joshe irsol ferada pkhuong brucem
2015-09-03T03:31:35Z names: scymtym__ foom @Xof pchrist reb PuercoPop jackdaniel
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2015-09-03T12:05:46Z jfe: has the sbcl project considered moving its repository to github?
2015-09-03T12:07:06Z scymtym__: jfe: there is a mirror on github: https://github.com/sbcl/sbcl
2015-09-03T12:07:30Z jfe: oh! i should have thought to search for it first. thanks :)
2015-09-03T12:07:41Z scymtym__: no problem
2015-09-03T12:08:03Z Shinmera: jfe: As far as I know pull requests and issues and the like aren't looked at there though
2015-09-03T12:08:23Z stassats: jfe: not considered
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2015-09-03T12:11:39Z jfe: the go project moved from mercurial to git+github to encourage more open source participation, and i wondered if that were also desirable to the sbcl maintainers.
2015-09-03T12:12:22Z jfe: sbcl is probably much more stable at this point, so maybe it’s not as much of a concern.
2015-09-03T12:12:49Z stassats: if you can't bother writing an email for your contributions, then maybe it's not worth it
2015-09-03T12:13:54Z jfe: you’re probably right. to be clear, i’m not a github fanboy :)
2015-09-03T12:14:00Z eudoxia: i recently learned that GHC is on the same boat (taking contribs only via mailing list) and it was surprising
2015-09-03T12:14:16Z stassats: but it's not only ml for sbcl
2015-09-03T12:14:36Z eudoxia: anyways i support letting users contribute through PRs because i don't even know how to use a mailing list :^)
2015-09-03T12:15:25Z stassats: put sbcl-bugs@lists.sourceforge.net  into the address field
2015-09-03T12:15:31Z stassats: no subscription needed
2015-09-03T12:15:42Z stassats: open tickets https://bugs.launchpad.net/sbcl
2015-09-03T12:16:01Z eudoxia: hmm, but how does one reply to an email in the list without having it in their inbox?
2015-09-03T12:16:04Z stassats: or go here and cry really loud that you can't use either because of you are a vegan or something
2015-09-03T12:16:22Z eudoxia: hahaha
2015-09-03T12:17:14Z jfe: vegan-source software…
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2015-09-03T13:56:39Z Posterdati: ji
2015-09-03T13:56:40Z Posterdati: hi
2015-09-03T13:56:52Z Posterdati: please how can I install the sources to for sbcl?
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2015-09-03T15:19:14Z rjmacready: hey guys
2015-09-03T15:19:34Z rjmacready: is there any problem with www.sbcl.org?
2015-09-03T15:19:39Z rjmacready: i cant access it
2015-09-03T15:19:47Z rjmacready: ERR_NAME_RESOLUTION_FAILED
2015-09-03T15:22:22Z stassats: yes
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2015-09-03T15:34:04Z rjmacready: ok then, thanks for the assistance :)
2015-09-03T15:34:24Z stassats: rjmacready: http://sbcl.sourceforge.net/
2015-09-03T15:37:21Z rjmacready: stassats: thanks!
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2015-09-03T16:49:56Z rick-monster: could anyone in here say if it would be remotely feasible to hack the boehm garbage collector into sbcl? (it's a gc library for any C program).  I'm faffing about with realtime audio and came to the conclusion what I *really* need is an implementation with option for incremental gc...
2015-09-03T16:50:23Z jackdaniel: sbcl has it's own GC
2015-09-03T16:50:41Z stassats: doesn't make much sense
2015-09-03T16:50:45Z jackdaniel: but you can use it exclusively via FFI
2015-09-03T16:53:08Z rick-monster: as I understand it sbcl gc is generational
2015-09-03T16:53:14Z rick-monster: I read this paper, referenced in the source code for sbcl gc ftp://ftp.cs.utexas.edu/pub/garbage/bigsurv.ps
2015-09-03T16:54:24Z fe[nl]ix: rick-monster: you can forget about it. it's feasible but a lot of work
2015-09-03T17:08:36Z jlarocco: fwiw, http://sbcl.sourceforge.net/index.html just not http://sbcl.org
2015-09-03T17:08:54Z jlarocco: oops, meant to have " is up" in there
2015-09-03T17:13:32Z stassats: i wouldn't consider it to be feasible
2015-09-03T17:13:55Z stassats: the gc is tightly integrated with code generation in sbcl
2015-09-03T17:17:54Z Xof: it depends on how much work is feasible :)
2015-09-03T17:18:49Z stassats: i would think that modifying boehm is unfeasible
2015-09-03T17:20:19Z rick-monster: ok thanks for the replies.  I read that ECL uses boehm so might be possible to at least try out an incremental gc with realtime audio...
2015-09-03T17:26:20Z jlarocco: oh, oops, I meant to post that in #lisp
2015-09-03T17:50:24Z attila_lendvai: now that a release is out again... this is a useful addition that helped me out multiple times: https://github.com/sbcl/sbcl/pull/3
2015-09-03T17:51:19Z stassats: pull requests are not the way to submit patches
2015-09-03T17:51:31Z attila_lendvai: it's up on lp also
2015-09-03T17:52:09Z stassats: the it'll await its turn
2015-09-03T17:53:31Z scymtym: attila_lendvai: i looked at the patch a few times but never had enough time to get through. it definitely looked useful.
2015-09-03T17:53:41Z attila_lendvai: well, *I* will not miss it... but since I wrote it I have debugged stuff for others remotely with this on multiple occasions... one was a slime bug.
2015-09-03T17:54:48Z attila_lendvai: I'm running my sbcl with it for almost two years now, but I have to admit that I don't do much lisp these days
2015-09-03T17:56:09Z scymtym: attila_lendvai: the usefulness for you and others is pretty clear. the problem is lack of (committer-)time for review before merging the patch.
2015-09-03T17:57:14Z attila_lendvai: I meant to say that regarding the review part
2015-09-03T17:58:16Z attila_lendvai: as I remember I was testing it throughly because of the nature of the beast... the development was driven by a bug and pretty much finished when the backtrace finally come up.
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2015-09-03T18:02:12Z Xof: I'd also love to integrate / review / fix up the patch for the (aver (< i 2)) bug
2015-09-03T18:02:25Z Xof: but... time
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2015-09-03T19:13:33Z attila_lendvai: I'm always open for fixing/reworking any of my patches, but I know that that's only part of the time that is needed...
2015-09-03T19:17:38Z scymtym: yes, nobody likes committing something without taking a close look and understanding it to a reasonable extend
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2015-09-04T00:54:13Z akkad: getting a index out of bounds error on thread joining. https://gist.github.com/e5a07dbc7e4fd41024ce
2015-09-04T00:54:41Z stassats: wrong channel?
2015-09-04T00:57:21Z akkad: this is sbcl
2015-09-04T00:57:50Z stassats: it's not
2015-09-04T00:57:53Z akkad checks the pcall source.
2015-09-04T00:58:05Z akkad: k
2015-09-04T00:58:44Z akkad: can't create on any other implementation. so figured here was apropos
2015-09-04T00:59:03Z stassats: even if it were, that paste is useless
2015-09-04T00:59:18Z stassats: so, you might as well not paste it
2015-09-04T01:01:20Z akkad: agreed, the default output on errors leaves a lot to be desired
2015-09-04T01:01:59Z stassats: the error is just fine
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2015-09-04T01:04:48Z akkad: but clearly of no value
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2015-09-04T01:05:47Z stassats: to me, because i have no context
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2015-09-04T04:36:06Z jackdaniel:  /j #gitlab
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2015-09-04T11:14:16Z stassats: Xof: i'd rather get rid of the stack machine fasls altogether
2015-09-04T11:15:02Z stassats: although that may make reading fasls less generic, but what's the point of being generic?
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2015-09-04T11:16:33Z stassats: instead of a stack machine i would use [byte indentifying the object][object specific data]
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2015-09-04T11:17:28Z stassats: at least that's what i use for my object storage, it's fast and compact
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2015-09-04T13:00:16Z fe[nl]ix: as long as fasls can still be concatenated
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2015-09-04T15:53:56Z attila_lendvai: FTR, a fix for the debugger: https://github.com/sbcl/sbcl/pull/11
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2015-09-05T08:14:52Z Xof: haha
2015-09-05T08:15:07Z Xof: the last xc-host leak (in this batch) is an evaluator-strategy leak
2015-09-05T08:15:23Z Xof: different answers (in terms of list structure) depending on whether it's interpreted or compiled
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2015-09-05T14:08:17Z stassats: oops, a bus error on armel
2015-09-05T14:23:31Z stassats: (sin 16d0) is causing it
2015-09-05T14:35:18Z stassats: huh, armel for some reason allocates something during (plusp (sin x))
2015-09-05T14:35:21Z stassats: while armhf doesn't
2015-09-05T14:38:25Z stassats: (sin 15) works
2015-09-05T14:38:33Z stassats: but the result is positive,  16 is negative
2015-09-05T14:38:46Z stassats: huh
2015-09-05T14:38:49Z stassats: result should be positive
2015-09-05T14:38:54Z stassats: (sin 15) => 0.0 actually
2015-09-05T14:40:46Z stassats: downloaded my binary for sbcl-1.2.7, (sin 15) => 0.65...
2015-09-05T14:40:54Z stassats: so, something is miscompiled here
2015-09-05T14:41:21Z stassats: and there's no spurious allocation in disassembly
2015-09-05T14:41:23Z stassats: huh, huh
2015-09-05T14:44:32Z stassats: for some reason it does move-from-unsigned NARGS=>R0 after the alien call to sin
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2015-09-05T14:45:56Z stassats: then it's MOVE-TO-DOUBLE R0 => F0
2015-09-05T14:46:00Z stassats: huh, huh
2015-09-05T14:47:04Z stassats: but it should be move-int-args-to-double
2015-09-05T14:53:24Z stassats: but it does correctly use move-double-to-int-args
2015-09-05T14:58:17Z stassats: male-call-out-tns correctly returns move-int-args-to-double
2015-09-05T15:03:13Z stassats: ok
2015-09-05T15:04:28Z stassats: it's e0721f45d2a1b750f624b09e070f4a4bd6aa9419
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2015-09-05T15:10:48Z stassats: even simple clean ups can break things
2015-09-05T15:15:11Z scymtym: sorry. i tried to be extra careful with that one
2015-09-05T15:15:29Z stassats: well, it's easy to fix
2015-09-05T15:15:40Z stassats: but it wasn't caught because i didn't build armel for a long time
2015-09-05T15:15:47Z stassats: was missing libc6:armel
2015-09-05T15:24:45Z stassats: scymtym: why was the date 2013?
2015-09-05T15:24:59Z stassats: there was no arm in 2013, is that an automerge fail?
2015-09-05T15:25:29Z scymtym: i probably started to write ENSURE-LIST in 2013 and then kept rebasing
2015-09-05T15:26:03Z scymtym: where does it touch the arm backend?
2015-09-05T15:26:10Z stassats: in aliencomp
2015-09-05T15:27:13Z scymtym: the second use of RESULT-TNS?
2015-09-05T15:27:20Z stassats: yes
2015-09-05T15:27:32Z scymtym: :(
2015-09-05T15:28:16Z scymtym: i specifically looked out for this kind of thing but concentration without tool support only gets you so far (or at least me)
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2015-09-05T16:48:42Z Xof: csr21@aleph-null:/tmp/tmp.Wa4HLyp6S7/x86$ diff -r {ccl32,sbcl}/obj/from-xc
2015-09-05T16:48:42Z Xof: csr21@aleph-null:/tmp/tmp.Wa4HLyp6S7/x86$ diff -r {clisp,sbcl}/obj/from-xc
2015-09-05T16:48:44Z Xof: ya
2015-09-05T16:48:46Z Xof: y
2015-09-05T16:52:20Z Xof: scymtym: we can start checking the host-lisp differences tests again
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2015-09-05T17:34:32Z scymtym: Xof: according to https://ci.cor-lab.org/job/sbcl-master-compare-outputs/421/console, you fixed the differences in numbers.lisp for ccl and clisp, but a difference in seqtran.lisp for clisp remains
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2015-09-05T19:10:33Z Xof: I haven't pushed the last change yet
2015-09-05T19:10:41Z Xof: sorry
2015-09-05T19:25:59Z scymtym: Xof: no problem. i just mentioned it in case you weren't aware
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2015-09-07T02:18:20Z 
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2015-09-07T16:18:35Z |3b|: hmm, sb-bsd-sockets doesn't seem to like my new msys2 install... grovels FIONBIO as 8004667E which isn't (signed-byte 32)
2015-09-07T16:19:45Z stassats`: is that after Fare's sb-grovel changes?
2015-09-07T16:20:00Z |3b|: current head i think
2015-09-07T16:20:31Z |3b|: yeah, that looks like it
2015-09-07T16:21:11Z stassats`: it was broken before, wasn't it?
2015-09-07T16:21:27Z |3b|: which it?
2015-09-07T16:21:45Z stassats`: 8004667E
2015-09-07T16:22:45Z |3b|: previously it grovelled as -2147195266, which is same lower 32 bits
2015-09-07T16:23:23Z |3b|: should make-target-contrib.sh be able to build/test a single contrib?
2015-09-07T16:23:52Z stassats`: yes, but it removes all contribs and rebuilds some things, unless you set a special variable
2015-09-07T16:23:55Z |3b|: actually, not sure what it did previously, this machine was running 32bit sbcl until today
2015-09-07T16:24:38Z stassats`: i did expect unsigned to get broken, but not to break existing code
2015-09-07T16:25:28Z |3b|: looks like it might work with part of the grovel change reverted (forgot to undo some other debug stuff though, so need to build again)
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2015-09-07T16:26:29Z stassats`: how to know which type a constant has?
2015-09-07T16:26:54Z |3b|: hand edit it when something breaks? :/
2015-09-07T16:26:57Z stassats`: i think using long long is a mistake
2015-09-07T16:27:07Z stassats`: on 32 bits
2015-09-07T16:28:14Z |3b|: doesn't help that the C definition is a few layers deep of confusing macro noise
2015-09-07T16:31:22Z |3b| can't remember what the type/value of 0x80000000 should be in C on 64bit windows
2015-09-07T16:32:32Z Guest78048: |3b|: int or long.
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2015-09-07T16:33:02Z |3b|: are both of those signed 32bits on 64bit windows? or is long 64 bits?
2015-09-07T16:33:03Z stassats`: unsigned int?
2015-09-07T16:33:37Z pkhuong: |3b|: long and int are 32 bit on windows
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2015-09-07T16:33:55Z |3b|: apparently before c99 it is allowed to be interpreted as unsigned int/long
2015-09-07T16:36:41Z |3b|: ah, hexadecimal constants check signed or unsigned, so it is unsigned int/long
2015-09-07T16:37:25Z |3b|: so sbcl is technically getting it right, and windows relies on getting it wrong since the function is specified to take long
2015-09-07T16:37:47Z stassats`: 0x80000000 >> 3 shows 0x10000000
2015-09-07T16:37:56Z stassats`: so, unsigned
2015-09-07T16:38:10Z |3b|: right
2015-09-07T16:38:49Z |3b|: and per spec as well (at least according to random internet sources)
2015-09-07T16:41:29Z |3b| supposes "correct" solution would be to manually cast it in the specific call, but not sure that's worth the effort.
2015-09-07T16:42:03Z |3b|: and i guess it grovels the function too, so can't just define it to take unsigned
2015-09-07T16:42:29Z stassats`: that was sentiment, :integer is not enough
2015-09-07T16:43:03Z stassats`: but it wants integers, so let's give it integers
2015-09-07T16:43:18Z stassats`: just removing long long from anything but win64
2015-09-07T16:43:49Z |3b|: yeah, patching the groveller to convert it to long is the "ugly" alternative
2015-09-07T16:44:07Z stassats`: that's what i'm doing now
2015-09-07T16:44:14Z |3b|: you mean remove it from win64?
2015-09-07T16:44:32Z |3b|: or use long long for other things on win64 but not that specific value
2015-09-07T16:45:29Z |3b|: (actually, feel free to not bother clarifying, since fixing it is more important and it sounds like you have an idea how to do that)
2015-09-07T16:46:01Z |3b|: contribs seemed to build with %d instead of %lld for :integer though, once my other changes were reverted
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2015-09-07T17:25:24Z stassats`: grovel-headers.c suffers from %l vs %ll on win64 too, but i don't expect to have 64-bit constants
2015-09-07T17:30:02Z stassats`: i can now build contribs, but does it do right the the original patch set out to do?
2015-09-07T17:32:09Z stassats`: i can look at the output in obj/asdf-cache
2015-09-07T17:36:15Z stassats`: now i broke win64 for the same reason
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2015-09-07T17:43:34Z stassats`: how bad is it to pass signed longs where signed is expected?
2015-09-07T17:45:45Z stassats`: i'll pack things into signed when possible
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2015-09-07T17:51:48Z pkhuong: would it make sense to print hex bytes + length?
2015-09-07T17:52:28Z pkhuong: we have to deal with endianness, but that should fail noisily.
2015-09-07T17:52:30Z stassats`: that wouldn't help
2015-09-07T17:52:49Z stassats`: the problem is not that the data is lost but that we expect things to fit into signed
2015-09-07T17:54:32Z pkhuong: that would give the same type punning behavior we had before.
2015-09-07T17:54:43Z pkhuong: it fits in 4 bytes, here are the bytes. oh, that's INT_MIN
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2015-09-07T17:55:18Z stassats`: i'm doing if (sizeof(1) == 4) (long) 1; else (long long) 1;
2015-09-07T18:08:38Z stassats`: now, do i have to do that only for win64
2015-09-07T18:08:50Z stassats`: or other things are broken as well
2015-09-07T18:09:36Z stassats`: i'll do it for other things just in case
2015-09-07T18:14:32Z stassats`: now will %lld print a signed long properly
2015-09-07T18:14:33Z stassats`: sigh
2015-09-07T18:14:43Z stassats`: i'm thinking about reverting the patch altogether
2015-09-07T18:18:25Z stassats`: so, yeah, i see how printing a word sized hex and the size can be helpful
2015-09-07T18:21:08Z stassats`: it would reduce the cruft on the C side
2015-09-07T18:24:42Z stassats`: i can cast to (long long) (long)unsigned_int
2015-09-07T18:24:43Z stassats`: sigh
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2015-09-07T18:51:36Z stassats`: |3b|: after a fifth try, fixed
2015-09-07T19:01:47Z stassats`: is sign extension actually defined when casting?
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2015-09-08T11:06:25Z Xof: *sigh*
2015-09-08T11:06:44Z Xof: it's a bad day when searching for mmap and MapViewOfFile gives me sbcl-related information :-/
2015-09-08T11:09:13Z flip214: "man mmap"?
2015-09-08T11:09:21Z flip214: or what information are you looking for?
2015-09-08T11:10:03Z Xof: how to port mmap()-using code on linux to the Windows API
2015-09-08T11:10:13Z Xof: but I think the answer is going to be "remove mmap()"
2015-09-08T11:11:27Z stassats`: i've found that mmap doesn't always give performance benefits, only some simplifications
2015-09-08T11:11:48Z Xof: yes
2015-09-08T11:16:07Z Xof: and it turns out that I have _already_ done this work, but one of my collaborators did a broken merge 5 years ago
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2015-09-08T15:30:55Z foom: mmap can actually be pretty crappy for performance, because the kernel has to infer your access patterns from individual page faults, and it doesn't always do an awesome job of that.
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2015-09-08T16:00:44Z pkhuong: and it forces tiny tiny pages
2015-09-08T16:01:22Z pkhuong: mmap was only free in an older performance model where the paging noise was a sunk cost.
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2015-09-09T18:38:40Z heddwch: That's what the mmap flags and madvise() are for..
2015-09-09T18:39:33Z attila_lendvai: if there's anybody looking for fixing a bug in sbcl, here's a simple fix: https://github.com/sbcl/sbcl/pull/11
2015-09-09T18:41:11Z stassats`: ok, what that a change to find-caller-name-and-frame or was it always broken?
2015-09-09T18:47:41Z stassats`: i'll skip the optional changes for now
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2015-09-09T18:50:27Z stassats`: hm
2015-09-09T18:50:38Z stassats`: no, i'll make the fix a bit different
2015-09-09T18:51:06Z stassats`: find-caller-name-and-frame is only ever used with nth-value 1, so i'll just change the order
2015-09-09T18:51:09Z stassats`: unless slime is using it
2015-09-09T18:52:34Z stassats`: or going even further, replace it with find-caller-frame
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2015-09-09T19:17:16Z stassats`: simplifying find-caller-name-and-frame and find-interrupted-name-and-frame to be just find-...-frame
2015-09-09T19:17:20Z stassats`: the name is never used
2015-09-09T19:17:30Z stassats`: or i think it's not used
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2015-09-09T19:37:35Z stassats`: attila_lendvai: so, i've fixed it by getting rid of the name altogether
2015-09-09T19:39:05Z attila_lendvai: stassats`: that's perfectly fine with me. I stopped digging when I saw what was causing the bug, but it did look like it has a fair amount of accidental complexity
2015-09-09T19:39:20Z stassats`: i think it was find-caller-name in the past
2015-09-09T19:39:28Z stassats`: then changed to finding the frame too
2015-09-09T19:39:35Z stassats`: and the name stopped being used
2015-09-09T19:39:52Z stassats`: and i love deleting more code than adding
2015-09-09T19:39:57Z attila_lendvai: I urge you to apply the removal of #'foo also, because it gives little speed, but wastes a lot of coder time
2015-09-09T19:40:02Z stassats`: 70 insertions(+), 89 deletions(-)
2015-09-09T19:40:16Z attila_lendvai: \o/
2015-09-09T19:40:54Z stassats`: well, we have a lot of things like #'foo, and changing it to 'foo during debugging is quite easy
2015-09-09T19:41:03Z attila_lendvai: it wasted about 5-10 minutes of mine in this one instance
2015-09-09T19:41:21Z attila_lendvai: it's easy *once you see that it needs to be done*
2015-09-09T19:41:22Z stassats`: although i would have started with 'foo too, i'm too lazy to change it to #'foo now
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2015-09-09T22:23:48Z plertrood: Hi, in CLisp (and I think most other lisps) going : (caadr '`,B) will give you SYSTEM::UNQUOTE.
2015-09-09T22:24:27Z plertrood: However in SBCL we get an error : The value ,B is not of type LIST.
2015-09-09T22:24:31Z stassats`: don't do that then
2015-09-09T22:24:48Z plertrood: Any ideas why it is different?
2015-09-09T22:24:59Z stassats`: because it's a different implementation
2015-09-09T22:25:31Z plertrood: Shouldn't ,B expand to (UNQUOTE B)?
2015-09-09T22:25:36Z stassats`: it should not
2015-09-09T22:25:50Z plertrood: I am fairly certain it used to.
2015-09-09T22:26:00Z scymtym: plertrood: if you want control over quasiquoted material try fare-quasiquote (you will also get portability)
2015-09-09T22:26:29Z stassats`: plertrood: never did
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2015-09-09T22:27:06Z plertrood: I see. Will look at that.
2015-09-09T22:27:31Z stassats`: but you shouldn't want to control it
2015-09-09T22:27:39Z plertrood: I am basically working through Let Over Lambda, and the sample code doesn't work in SBCL..
2015-09-09T22:27:52Z stassats`: "Let Over Lambda", well, here's your problem
2015-09-09T22:28:06Z plertrood: :-)
2015-09-09T22:28:14Z plertrood: You are not a fan?
2015-09-09T22:28:25Z stassats`: how did you guess?
2015-09-09T22:29:18Z plertrood: Why do you not like it (apart from not working in SBCL)?
2015-09-09T22:29:30Z stassats`: it bastardizes the language
2015-09-09T22:29:43Z pkhuong: plertrood: it does things that work by accident
2015-09-09T22:30:11Z plertrood: Right... like ,B => (UNQUOTE B)..
2015-09-09T22:30:36Z plertrood: Presumably that isn't in the standard..
2015-09-09T22:30:46Z stassats`: it is not indeed
2015-09-09T22:34:29Z plertrood: Cool. Thanks for the insight. I will read it with a bit more skepticism now.
2015-09-09T22:35:13Z stassats`: yes, lisp can be transformed to do things it wasn't designed to do, but that doesn't mean you should
2015-09-09T22:35:43Z stassats`: a language is means for communications, if everyone designed their own language, how would you be able to share programs?
2015-09-09T22:36:14Z plertrood: Indeed.
2015-09-09T22:36:37Z plertrood: Any idea what the type of ,b should be?
2015-09-09T22:36:47Z stassats`: clhs ,
2015-09-09T22:36:48Z specbot: http://www.lispworks.com/reference/HyperSpec/Body/02_dg.htm
2015-09-09T22:36:53Z stassats`: clhs `
2015-09-09T22:36:53Z specbot: http://www.lispworks.com/reference/HyperSpec/Body/02_df.htm
2015-09-09T22:37:10Z stassats`: it's whatever as long as the result is as specified above
2015-09-09T22:38:08Z attila_lendvai: well, one of them main points of lisp is that it can grow towards your problem, so that's not a generally accepted attitude. it's a double edged sword though, so one should wield it with caution...
2015-09-09T22:43:40Z plertrood: So the spec says "An implementation is free to interpret a backquoted form F1 as any form F2 that, when evaluated, will produce a result that is the same under equal as the result implied by the above definition, "
2015-09-09T22:43:52Z plertrood: I guess that explains it.
2015-09-09T22:43:59Z plertrood: Thanks.
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2015-09-10T02:03:51Z dougk2: in (lambda (x) (cond ((listp x) 'a) ((listp x) 'b))) with literally the same test twice, we don't delete the second as unreachable. Is this a regression?
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2015-09-10T07:05:51Z loke: hello xof
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2015-09-10T13:15:05Z pkhuong: dougk2: I think so
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2015-09-12T18:20:15Z stassats`: sbcl is about to have 9000 commits
2015-09-12T18:20:21Z stassats`: at 8995 now
2015-09-12T18:22:50Z jackdaniel: 8192th was the anniversary
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2015-09-12T19:41:45Z Xof: 9000 commits to master, presumably (including conversions from CVS HEAD)?  Branches in the CVS era were less easily merged...
2015-09-12T19:41:56Z Xof: or are you counting those on cvs branches too?
2015-09-12T19:42:18Z Xof: when-all-you-have-is-a-hammer-branch...
2015-09-12T19:43:28Z nyef: ... every problem looks like a thumb?
2015-09-12T19:43:36Z Xof: :-)
2015-09-12T19:44:05Z stassats`: git rev-list HEAD --count
2015-09-12T19:44:13Z nyef: I should try to do a MIPS SBCL build soon, shouldn't I?
2015-09-12T19:44:51Z stassats`: i think i fixed up the build problems using qemu, so it at least should build
2015-09-12T19:45:06Z stassats`: unless it became broken again
2015-09-12T19:45:30Z nyef: That must have been painful, given how slow qemu gets.
2015-09-12T19:46:03Z stassats`: it didn't involved any interactive debugging
2015-09-12T19:46:09Z nyef: On the other hand, I'm running 700MHz with a UP kernel, so it's not going to be particularly fast...
2015-09-12T19:46:11Z stassats`: so, just firing up and waiting
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2015-09-12T21:27:31Z stassats`: getting back to arm64
2015-09-12T21:27:39Z stassats`: and a first foray into call_into_lisp
2015-09-12T21:30:25Z nyef: Ooh. Congratulations.
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2015-09-12T21:30:37Z nyef: That took a while to get to with the original arm port.
2015-09-12T21:32:50Z stassats`: the function looks like something i managed to generate, but gdb somehow gets confused
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2015-09-12T21:43:01Z stassats`: i love how gdb uses one endiannes and objdump another for disassembly
2015-09-12T21:44:46Z stassats`: ok, i clearly see CSEL of my own baking
2015-09-12T21:45:09Z stassats`: and it disassembles to what i assembled it, which is nice
2015-09-12T21:46:40Z stassats`: being able to look at disassembled instructions is immensely helpful
2015-09-12T21:46:55Z stassats`: now i need to manage to run something sensible
2015-09-12T21:47:35Z stassats`: e.g. return from the function
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2015-09-12T22:12:49Z stassats`: inserted some segment printing after code generation, and now gdb doesn't show the same thing
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2015-09-12T22:14:35Z nyef can never quite trust gdb.
2015-09-12T22:14:58Z stassats`: it crashes too, so gdb is probably right
2015-09-12T22:15:40Z stassats`: but before i added (safety 0) to my initial function it showed something resembling the intended code
2015-09-12T22:22:42Z stassats`: without (safety 0) i can see the corresponding bits again
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2015-09-12T23:07:34Z stassats`: i'm having trouble finding generated code anywhere
2015-09-12T23:08:32Z stassats`: using the gdb find command from dynamic-space-start
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2015-09-12T23:36:57Z stassats`: for some reason there is a list after the function
2015-09-12T23:37:03Z stassats`: weird weird
2015-09-12T23:37:17Z stassats`: after the function header
2015-09-12T23:37:22Z stassats`: and no code in site
2015-09-12T23:48:53Z nyef: Hack the build system to include trace files for every cross-built source?
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2015-09-12T23:50:37Z stassats`: i have only one file for cold-init
2015-09-12T23:50:57Z stassats`: and i trace it
2015-09-12T23:51:23Z stassats`: i also print code-segments after it is compiled, now without declares i can found the contents of code-segments in gdb
2015-09-12T23:51:39Z stassats`: with (safety 0) (to get rid of argument checks) i can't see it anymore
2015-09-12T23:52:25Z nyef: That seems odd.
2015-09-12T23:52:31Z stassats`: so, is genesis playing tricks on me or what?
2015-09-12T23:53:20Z nyef: It shouldn't be, the function header is installed as part of a literal blob of binary data, isn't it?
2015-09-12T23:53:41Z stassats`: i actually can see the function header
2015-09-12T23:53:43Z stassats`: the widetag
2015-09-12T23:53:50Z stassats`: and the first couple of slots make sense
2015-09-12T23:54:12Z stassats`: then i see some weird lists
2015-09-12T23:57:54Z nyef: ... I've got no idea, then.
2015-09-12T23:58:19Z stassats`: i'll need to find the code in the cold core
2015-09-12T23:58:35Z nyef: At least the map should help with that.
2015-09-12T23:59:07Z stassats`: well, i have only one function, so what genesis prints is the same as in the map
2015-09-12T23:59:22Z stassats`: as in /(DESCRIPTOR-BITS INITIAL-FUN)=#X4F0191CB
2015-09-12T23:59:26Z nyef: Ah, right.
2015-09-12T23:59:35Z nyef: Also validate the fasl?
2015-09-12T23:59:53Z stassats`: good idea too
2015-09-13T00:00:08Z stassats`: i need a hex editor where i can change aligment first
2015-09-13T00:00:41Z nyef: Editor, or viewer?
2015-09-13T00:00:45Z stassats`: man, do all hex editors suck or what?
2015-09-13T00:00:48Z stassats`: whichever
2015-09-13T00:01:03Z nyef: Use dd to strip of $n$ leading bytes and pipe through hexdump -Cv
2015-09-13T00:01:20Z stassats`: yeah, probably the easiest
2015-09-13T00:02:46Z stassats`: hexdump has an -s parameter
2015-09-13T00:02:56Z nyef: Ooh.
2015-09-13T00:03:06Z White_Flame: bless is a pretty powerful hex editor
2015-09-13T00:03:15Z White_Flame: in order to make custom layouts, though, you need to edit config files
2015-09-13T00:03:52Z White_Flame: but it's easy to insert 00s or delete bytes, reflows the line length based on window width, etc
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2015-09-13T00:04:51Z White_Flame: and apt-get'able
2015-09-13T00:10:23Z stassats`: ok, can't figure out hexdump's -e option quite easily
2015-09-13T00:10:30Z stassats`: this bless thing predictably sucks
2015-09-13T00:11:59Z nyef: There's a reason I specified -Cv (-:
2015-09-13T00:12:51Z stassats`: hexdump -s 1 -e '4/4 "%08X " "\n"' seems to do the jub
2015-09-13T00:15:17Z stassats`: and no need to align, i can already see NIL
2015-09-13T00:17:12Z stassats`: found a simple-fun
2015-09-13T00:17:34Z stassats`: now, the code doesn't look like anything what i printed during %compile-component
2015-09-13T00:19:21Z stassats`: can't find it anywhere
2015-09-13T00:19:26Z stassats`: now to the fasl
2015-09-13T00:20:35Z stassats`: the fasl is alright
2015-09-13T00:21:00Z stassats`: so, genesis?
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2015-09-13T00:28:34Z nyef: Sounds like it, I guess.
2015-09-13T00:30:50Z stassats`: there was a #+arm in genesis
2015-09-13T00:30:59Z stassats`: adding arm64 to it
2015-09-13T00:32:09Z stassats`: didn't help
2015-09-13T00:33:02Z nyef: The #+arm in genesis, IIRC, is for the same thing that a #+sparc is?
2015-09-13T00:33:13Z stassats`: yes
2015-09-13T00:33:34Z nyef: That's the tagged-function-pointer-in-fdefn thing.
2015-09-13T00:34:34Z nyef: The other bit might be the do-cold-fixup case?
2015-09-13T00:34:51Z stassats`: i'm not yet up to fixups
2015-09-13T00:35:58Z nyef: This is the second-ever 64-bit backend, isn't it?
2015-09-13T00:36:09Z stassats`: second proper
2015-09-13T00:36:12Z nyef: Look for x86-64 conditionals.
2015-09-13T00:37:30Z nyef: Hrm. Nothing obvious there, either.
2015-09-13T00:39:39Z stassats`: some printing into genesis incoming
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2015-09-13T00:59:14Z stassats`: printing dynamic gspace isn't illuminating
2015-09-13T00:59:53Z stassats`: because i'm doing it wrong, it's byte addressed, not word addressed
2015-09-13T01:03:28Z stassats`: i see the function header, no code either in gspace
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2015-09-13T01:03:48Z stassats`: that just after doing cold-load
2015-09-13T01:06:08Z stassats`: there is a thing called descriptor-gspace
2015-09-13T01:07:16Z stassats`: looks like the code is hiding there
2015-09-13T01:08:02Z nyef: Something to do with the lack of debug information somehow causing the core image to be truncated?
2015-09-13T01:08:51Z stassats`: there should be debug information
2015-09-13T01:09:04Z stassats`: of some sort or another
2015-09-13T01:09:39Z stassats`: there's a thing that prints "raw code from code-fop"
2015-09-13T01:09:44Z stassats`: it prints my code correctly
2015-09-13T01:10:08Z stassats`: at line 2694
2015-09-13T01:10:37Z stassats`: but isn't this descriptor thing inside gspace anyway?
2015-09-13T01:11:49Z stassats`: something looks fishy
2015-09-13T01:12:26Z stassats`: this things prints 3 32-bit zeros
2015-09-13T01:12:31Z stassats`: while it should be 6 64-bit zeros
2015-09-13T01:13:35Z stassats`: those are the slots for simple-fun
2015-09-13T01:13:46Z stassats`: which are later filled
2015-09-13T01:14:35Z stassats`: if it's missing 36 bytes, then the code will be overwritten, would it be not?
2015-09-13T01:16:29Z stassats`: looking at the fasl, why are instructions taking up 64 bits?
2015-09-13T01:16:45Z stassats`: is there an assumption somewhere that the instructions are word-sized?
2015-09-13T01:18:05Z stassats`: when i print the code vector they are properly 32-bit
2015-09-13T01:18:11Z nyef: Check your assembler definition... And your definition for the XEP entry?
2015-09-13T01:20:09Z stassats`: the fact that the code-segment look tip-top, i would think that my assembler definition are reasonable
2015-09-13T01:24:26Z stassats`: ok, is hexdump wrong now?
2015-09-13T01:26:21Z nyef: There's a reason I use -Cv. I can see each byte that way, and there's no tricky format conversion going on to possibly mislead me.
2015-09-13T01:27:10Z stassats`: i did something wrong
2015-09-13T01:27:33Z stassats`: the original hexdump i looked was right
2015-09-13T01:28:16Z stassats`: and it shows 6 32-bit slots
2015-09-13T01:28:30Z stassats`: but they should be 64-bit
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2015-09-13T01:29:00Z stassats`: with safety 1 there was more code and some of it wasn't overwritten
2015-09-13T01:29:05Z stassats`: now, where does that happen?
2015-09-13T01:29:50Z nyef: But some of it was still overwritten?
2015-09-13T01:30:19Z stassats`: something looked weird, but i chalked it up for my preliminary instructions being bogus
2015-09-13T01:31:12Z stassats`:  allocate-xep-frame or something?
2015-09-13T01:32:03Z stassats`: man oh man, that took much more than i wanted it to take
2015-09-13T01:32:32Z stassats`: it has (dotimes 6 (inst word 0))
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2015-09-13T01:34:51Z stassats`: it should have become clear when i printed the data from code-segment
2015-09-13T01:35:01Z stassats`: three hours ago
2015-09-13T01:36:23Z stassats`: at least it didn't take two days
2015-09-13T01:38:39Z stassats`: now that's more like it
2015-09-13T01:39:13Z stassats`: i now can run my instructions, not just blindly hope i get all the bits right
2015-09-13T01:39:16Z stassats`: that was the goal
2015-09-13T01:40:28Z stassats`: and i even got some of them right already, which is nice
2015-09-13T01:43:41Z stassats`: now maybe teach objdump to disassemble cold-core
2015-09-13T01:44:52Z nyef: I wonder how many places you're going to run into where there's a #+/-x86-64 for a 64-bit-ism?
2015-09-13T01:45:39Z stassats`: i'll be busy for some time just rewriting instructions, then vops one by one
2015-09-13T01:46:05Z stassats`: and exhaustively test them each, because when they break two months later, all the context on how they worked will be gone
2015-09-13T01:47:14Z nyef: Yeah, I know. There's a reason why I had a "bootstrap" file that I used to work out all of the control-flow damage before I started in on getting the rest of the cold-core to compile. (-:
2015-09-13T01:47:21Z stassats`: and i finally jumped to spend a weekend concentrating on getting cold-init to run, so that then i can do things in byte-sized chunks and be overwhelmed by the task
2015-09-13T01:47:31Z stassats`: yeah, i have a bootstrap file too
2015-09-13T01:48:11Z stassats`: it's only contents is (sb!impl::%defun 'sb!kernel::!cold-init (lambda nil (declare (optimize (safety 0))) #x34) nil nil nil)
2015-09-13T01:48:52Z stassats`: (and _not_ be overwhelmed)
2015-09-13T01:49:41Z stassats`: running objdump on the host system would be really useful, i just need to fetch the location and size of the init-function and then feed it to objdump
2015-09-13T01:49:50Z stassats`: i also need to get objdump that understand arm
2015-09-13T01:50:35Z stassats`: that was aptitude install binutils-multiarch
2015-09-13T01:55:24Z stassats`: now i need to write a coreparser in lisp and extract the init-function
2015-09-13T01:55:36Z stassats`: probably a task for tomorrow
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2015-09-13T17:18:16Z stassats`: (sb-kernel:get-header-data (lambda ())) gives a strange result
2015-09-13T17:18:22Z stassats`: for some reason it includes the widetag
2015-09-13T17:24:25Z nyef: Universally, or only on certain platforms?
2015-09-13T17:24:48Z stassats`: x86s
2015-09-13T17:25:02Z nyef: x86oids are weird anyway.
2015-09-13T17:25:21Z stassats`: same thing on arm
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2015-09-13T17:31:55Z stassats`: now i have http://paste.lisp.org/display/155110
2015-09-13T17:32:58Z stassats`: and that's on the host, so it will simplify getting instructions right
2015-09-13T17:38:03Z stassats`: works on a x86-64 core too
2015-09-13T17:46:08Z stassats`: a bit better: http://paste.lisp.org/display/155110#1
2015-09-13T17:47:13Z stassats`: here's the code: https://gist.github.com/stassats/796da6ad2665582f5956
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2015-09-13T19:31:00Z stassats`: hm, it takes 17 seconds for make-host1 && make-host-2
2015-09-13T19:31:16Z stassats`: maybe i can load xc inside slime and speed this part up
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2015-09-13T19:42:23Z stassats`: a bit problematic
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2015-09-13T20:15:19Z stassats`: the logical immediate encoding is quite complicated
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2015-09-13T20:43:24Z francogrex: I have a working sbcl on arm (chroot from android os into linux image). But is it trivial to build sbcl to run natively on android with ndk like for example for this sqlite3 project? https://github.com/stockrt/sqlite3-android
2015-09-13T20:43:43Z stassats`: it is not trivial
2015-09-13T20:44:06Z stassats`: and largely useless
2015-09-13T20:44:31Z francogrex: you useless?
2015-09-13T20:44:46Z stassats`: no
2015-09-13T20:45:11Z francogrex: sorry, I was typing "why useless?"
2015-09-13T20:45:37Z stassats`: no use for it, duh
2015-09-13T20:46:11Z francogrex: I can think of many. from an android term, type sbcl and voila!
2015-09-13T20:47:40Z francogrex: now I must chroot to the linux img... painful and consumes energy
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2015-09-14T05:22:04Z flip214: When writing a macro, can I annotate the resulting code with the original forms in some way, so that during debugging it's easy to see which part err'd?
2015-09-14T05:35:50Z loke: flip214: No. I have a hard time understanding how that would work. There is no 1:1 correspondence between macro form and the resulting form
2015-09-14T05:47:17Z flip214: loke: my intention is, when some generated form produces an error, sbcl would see that this code block originated from some source form, and can highlight that in the swank debugger
2015-09-14T05:48:02Z flip214: like via (defun abc ( ) #1=(....) #2=(....)) (sb-ext:register-source #1# (cons of original form)
2015-09-14T05:48:05Z flip214: )
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2015-09-14T14:09:40Z scymtym__: the range of commits starting with e406a45f seems to have introduced a regression (see e.g. https://ci.cor-lab.org/job/sbcl-master/1199/featureset=1,label=ubuntu_trusty_32bit/consoleFull search for ":SET-PPD-UNKNOWN-TYPE")
2015-09-14T14:24:48Z Xof: that doesn't seem to be a drastic regression
2015-09-14T14:26:45Z Xof: we no longer get the warning about the compound type containing unknown types
2015-09-14T14:27:35Z dougk_: Xof: i think that is a regression. we're supposed to moar warnings.
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2015-09-14T16:35:25Z stassats`: copied code from llvm to encode arm64 logical immediates, seems to work, but i still don't really understand it
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2015-09-14T16:39:36Z nyef: Is the encoding anything like the arm32 immediates?
2015-09-14T16:40:54Z stassats`: nothing like
2015-09-14T16:41:35Z stassats`: nyef: http://llvm.org/docs/doxygen/html/AArch64AddressingModes_8h_source.html#l00209
2015-09-14T16:42:16Z stassats`: the manual has a vague description of what it is, and some code on how to decode the immediate, but not how to encode it
2015-09-14T16:42:57Z stassats`: "The Logical (immediate) instructions accept a bitmask immediate value that is a 32-bit pattern or a 64-bit pattern viewed as a vector of identical elements of size e = 2, 4, 8, 16, 32 or, 64 bits. Each element contains the same sub-pattern, that is a single run of 1 to (e - 1) nonzero bits from bit 0 followed by zero bits, then rotated by 0 to (e - 1) bits. This mechanism can generate 5334 unique 64-bit patterns as 2667 pairs of
2015-09-14T16:42:57Z stassats`: pattern and their bitwise inverse."
2015-09-14T16:43:30Z stassats`: and it's encoded as two fields, one for rotation and one for the pattern
2015-09-14T16:44:26Z stassats`: now that i can produce those fields, i can play it and reverse engineer it and produce more sensible code
2015-09-14T16:48:35Z nyef: Eek.
2015-09-14T16:48:45Z nyef: And I thought the shifter_operand stuff was bad.
2015-09-14T16:49:39Z stassats`: and this is only for logical operations
2015-09-14T16:49:51Z stassats`: so immediate encoding is different for different operations
2015-09-14T16:49:57Z stassats`: fun, fun
2015-09-14T16:53:15Z nyef: Well, good luck.
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2015-09-14T17:03:56Z Xof: wait, does that mean you can't get the all-ones bitmask?
2015-09-14T17:04:24Z stassats`: right
2015-09-14T17:04:42Z Xof: neat
2015-09-14T17:04:45Z Xof: (nor all-zeros)
2015-09-14T17:04:54Z Xof: fair enough, I suppose
2015-09-14T17:05:24Z pkhuong: will we end up with a lookup table of patterns -> encoding? (:
2015-09-14T17:05:39Z Xof: I think that thing about 2667 pattern + bitwise inverse is a spectacularly unhelpful red herring
2015-09-14T17:06:02Z stassats`: pkhuong: no particular reason for it to be fast
2015-09-14T17:06:50Z pkhuong: stassats`: harder to get wrong.
2015-09-14T17:07:07Z stassats`: but you need to generate the masks first
2015-09-14T17:10:48Z stassats`: i wonder how it's implemented in hardware
2015-09-14T17:11:17Z Xof: suddenly I have a need to compute the size e for a given constant by taking the fourier transform of its bitwise representation and peak-picking
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2015-09-14T18:11:25Z flip214: Xof: wonderful, just wonderful ... please write a blog post about that!
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2015-09-14T18:32:25Z Xof: no, it's too horrible
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2015-09-14T19:28:56Z stassats`: ok, finally grasped the encoding
2015-09-14T19:29:07Z stassats`: was mixing up variables for an hour
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2015-09-14T21:05:03Z stassats`: here's my first approximation of the encoder http://paste.lisp.org/display/155178
2015-09-14T21:06:10Z stassats`: so basically it encodes the number of consecutive set bits and the amount of rotation it needs
2015-09-14T21:06:32Z stassats`: the length is determined from either the number of set bits or the additional N field for 64-bit patterns
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2015-09-14T21:09:32Z stassats`: objdump seems to agree with me
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2015-09-14T21:21:23Z stassats`: nope, not quite right
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2015-09-14T21:48:00Z stassats`: corrected: http://paste.lisp.org/display/155178#1
2015-09-14T21:48:18Z stassats`: this encoding is exceedingly clever
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2015-09-14T21:49:17Z stassats`: the size is encoded by the highest bit in the inverted pattern
2015-09-14T21:49:32Z stassats`: so for a shorter than full length pattern the unused bits need to be set to 1
2015-09-14T21:50:30Z stassats`: so it encodes both the length and the pattern at the same time
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2015-09-14T21:53:46Z stassats`: ok, a day to encode just one kind of immediates, that's a bit too slow
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2015-09-14T21:56:34Z stassats`: but that seems to be the most complicated part of arm64
2015-09-14T21:57:08Z Xof: well that sounds like hubris
2015-09-14T21:57:17Z Xof: are you working on an emulator or real hardware?
2015-09-14T21:57:39Z stassats`: i have real hardware, but right now i'm defining instructions
2015-09-14T21:58:00Z stassats`: so i wrote a parser that parses the cold core and find the initial function and then passes the function to objdump
2015-09-14T21:58:13Z Xof: what kind of real hardware?
2015-09-14T21:58:24Z stassats`: so i don't have to shuffle it and run from gdb, i can run it on the desktop
2015-09-14T21:58:31Z stassats`: a phone
2015-09-14T21:58:50Z stassats`: s/run/see the disassembly/
2015-09-14T21:59:40Z stassats`: when it's time to rewrite VOPs, i will have to use the target hardware to test them
2015-09-14T21:59:53Z Xof: fair enough
2015-09-14T22:00:13Z stassats`: but it's a fairly fast target, takes 11 minutes to build sbcl
2015-09-14T22:00:50Z stassats`: my objdump thingy just saves me from having to run gdb and break on call_into_lisp
2015-09-14T22:02:35Z stassats`: and rewriting instructions is also the hardest part, the instructions themselves are mostly the same, save for conditional execution and a couple of missing instructions
2015-09-14T22:02:38Z stassats`: and no access to PC
2015-09-14T22:09:14Z stassats`: the CPU in the new big ipad seems to be the most advanced arm cpu, but probably not easy to develop sbcl on it
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2015-09-14T22:26:25Z noHue6: Hi. How do I create C reference (&var) with sb-alien?
2015-09-14T22:34:23Z pkhuong: addr
2015-09-14T22:35:51Z noHue6: Thanks.
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2015-09-15T07:20:04Z scymtym: dougk_: 8f7165c has (declare (type lexenv-designator) …) which doesn't seem to declare anything
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2015-09-16T00:24:44Z names: ccl-logbot pkhuong_ luis- jfe |3b|` karswell` ferada dougk2 drewc scymtym attila_lendvai DGASAU stassats` igajsin1 nyef Xof dougk_ nicdev mprelude pchrist heddwch Intensity PuercoPop brucem foom waaron noHue6 psilord reb psy_ loke kanru tifa salv0 scymtym__ abbe sigjuice angavrilov tmh_ dustinm` chris2 jdz Bike pootler White_Flame DeadTrickster joshe jozip jackc- jlarocco_work jackdaniel antoszka les frankS2 chu carvite Posterdati minion specbot
2015-09-16T00:24:44Z names: alchemis7 christoph_debian jsnell_ fikusz flip214 dsp_ yauz rj-code mood _iwc p_l fe[nl]ix drmeister dim aeth irsol
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2015-09-16T01:36:02Z PuercoPop: Is it possible that putting a function in a keyword property-list interfere with garbage collection of memory allocated during compilation?
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2015-09-16T04:14:42Z PuercoPop: What would be the best approach to figure why is the compiler consing so much when compiling some code? Currently (adsf:test-system :djula) crashes due to heap exhaustion.
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2015-09-16T05:15:26Z flip214: PuercoPop: try to insert a few GC calls in the tests?
2015-09-16T05:15:32Z flip214: just to find out whether that helps
2015-09-16T05:15:50Z flip214: how big is the heap?
2015-09-16T05:18:22Z PuercoPop: the default.
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2015-09-16T06:39:35Z Ober: debugger invoked on a SB-INT:EXTENTION-FAILURE: Don't know how to REQUIRE SB-POSIX on latest releast on netbsd
2015-09-16T06:41:19Z Ober: https://gist.github.com/30476cc3054cc8f278a0
2015-09-16T06:41:22Z Ober: will double check compile logs
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2015-09-16T14:24:20Z dougk_: scymtym: thanks. Just saw your remark now. I'll fix that.
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2015-09-16T14:57:10Z scymtym__: dougk_: seems to be fixed/have disappeared on its won already. the most recent build does not have the test failure: https://ci.cor-lab.org/job/sbcl-master/1200/
2015-09-16T14:57:23Z scymtym__: s/won/own/
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2015-09-16T15:26:44Z stassats`: armv8 instructions come along nicely, probably will finish all the needed ones for vops today
2015-09-16T15:26:56Z stassats`: maybe except for compute-lra and related
2015-09-16T15:28:04Z Xof: would it be nice to have in a public branch?
2015-09-16T15:30:25Z stassats`: maybe this weekend, once i have something presentable
2015-09-16T15:31:29Z stassats`: armv8 has a lot of aliases, disassembling wouldn't be easy
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2015-09-16T17:36:52Z stassats: only fp instructions are left
2015-09-16T17:37:15Z stassats: maybe i can cross them off tonight as well and get something interesting running from cold-init
2015-09-16T17:37:28Z stassats: i can get something interesting without fp too
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2015-09-16T19:01:24Z stassats: can't figure out why current_control_frame_pointer is 0
2015-09-16T19:01:32Z stassats: or why it being zero is ok
2015-09-16T19:03:46Z stassats: i'm just doing something wrong with it
2015-09-16T19:13:11Z stassats: for some reason LDR CFP, [CFP] produces 0
2015-09-16T19:13:22Z stassats: CFP has the right address
2015-09-16T19:14:22Z |3b|` is now known as |3b|
2015-09-16T19:14:33Z stassats: bah, i'm looking at the wrong thing
2015-09-16T19:16:50Z stassats: i'm overwriting CFP during ENTER_PA
2015-09-16T19:17:26Z stassats: because i'm using ldr and not str there, duh
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2015-09-16T20:08:52Z stassats: unexpected return from initial thread in main()
2015-09-16T20:08:55Z stassats: success, kinda
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2015-09-16T20:16:41Z Xof: very nice
2015-09-16T20:17:15Z stassats: now for compute-code, that ought to be easy
2015-09-16T20:21:43Z stassats: or maybe primtive print first
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2015-09-16T22:43:02Z stassats: finally got compute-code right
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2015-09-17T02:29:36Z stassats: primitive print success, finally
2015-09-17T02:29:42Z stassats: primitive, but success
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2015-09-17T17:01:42Z stassats: found a source of conservatism on arm64, you can't offset an unconditional branch with a register
2015-09-17T17:02:58Z stassats: though it supports high-tags
2015-09-17T17:07:43Z stassats: ppc has the same issue and somehow is ok
2015-09-17T17:08:21Z stassats: it uses an interior-reg for calls
2015-09-17T17:09:39Z stassats: i now actually see the point of the interior pointer
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2015-09-17T18:43:22Z nyef: Heh. So, arm64 is going to use untagged trampolines?
2015-09-17T18:44:27Z stassats: does it have to?
2015-09-17T18:44:36Z stassats: does arm use them?
2015-09-17T18:46:57Z aeth: (defun test-loop () (declare (optimize (speed 3) (safety 0))) (let ((foo 0)) (1+ foo)) (test-loop)) (disassemble 'test-loop)
2015-09-17T18:47:07Z aeth: Is there a way to tell that optimizations are going to be this good without using disassemble?
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2015-09-17T18:47:59Z nyef: Most platforms use untagged trampolines and raw function addresses. SPARC and ARM, because they can do that displaced jump thing, use tagged trampolines and raw function addresses.
2015-09-17T18:47:59Z stassats: (setf sb-c::*compiler-trace-output* *standard-output*) (defun test-loop () (declare (optimize (speed 3) (safety 0))) (let ((foo 0)) (1+ foo)) (test-loop))
2015-09-17T18:48:03Z stassats: no assembly, just IR
2015-09-17T18:49:10Z nyef: x86oids could do the tagged thing, except that they like to use indirect jump instructions, taking the entry point address straight from memory, and that can't have a displacement added, so they go the untagged route.
2015-09-17T18:51:38Z stassats: it's not clear to me what part is actually tagged
2015-09-17T18:52:31Z nyef: The "raw address" in an fdefn.
2015-09-17T18:52:58Z nyef: On most platforms, it points to the first instruction in the function entry point.
2015-09-17T18:53:04Z stassats: but it can be untagged in a temporary register or something?
2015-09-17T18:53:18Z nyef: On SPARC and ARM, it's a tagged pointer to the entry point (or the trampoline).
2015-09-17T18:55:13Z nyef: If it's tagged, and you untag it, you have to untag it into a register with the interior-pointer nature.
2015-09-17T18:55:40Z nyef: If it's not tagged, you have to load it into a register with the interior-pointer nature.
2015-09-17T18:55:43Z stassats: sure
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2015-09-17T18:56:27Z nyef: And it WILL get untagged, because the untagged value ends up in the program counter / instruction pointer, which possesses the interior-pointer nature.
2015-09-17T18:57:01Z stassats: anyhow there's no way of getting around branching through LIP
2015-09-17T18:57:12Z stassats: not that that's a problem
2015-09-17T18:58:33Z stassats: i can now call functions, do primitive print, allocate conses, for now i'm sifting through compilation errors after enabling all files in the build-order
2015-09-17T18:58:48Z nyef: Well, congratulations.
2015-09-17T18:59:04Z stassats: mostly cant-encode-immediate and stuf
2015-09-17T18:59:05Z stassats: f
2015-09-17T18:59:56Z stassats: i'm going to get rid of composite-immediate-instruction
2015-09-17T19:00:05Z stassats: it already gave me enough nightmares in arm32
2015-09-17T19:00:14Z stassats: and arm64 has load-wide for loading 16-bit chunks
2015-09-17T19:00:57Z stassats: and there's enough registers that i allocated a tmp-tn
2015-09-17T19:01:56Z stassats: and immediate are not uniform on arm64
2015-09-17T19:02:08Z stassats: add/sub use a different kind form and/orr (that pesky one)
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2015-09-17T21:16:16Z stassats: successfully compiled all files
2015-09-17T21:16:28Z stassats: somethings are still commented out, like FP instructions
2015-09-17T21:17:12Z stassats: let's see where cold-init falls
2015-09-17T21:18:07Z stassats: sigill
2015-09-17T21:18:59Z stassats: that's actually the debug trap
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2015-09-17T22:47:05Z stassats: can now internally err
2015-09-17T22:53:17Z stassats: seems like i'm at the point where i could use some help with it, but probably not many people have ARMv8 targets
2015-09-17T22:53:33Z nyef: Mmm. I don't believe that I have such a machine.
2015-09-17T22:54:08Z stassats: cold init fails with "object is of the wrong type"
2015-09-17T22:54:33Z stassats: but i guess i shouldn't focus on cold init and fill in the FP instructions and audit all the changed vops
2015-09-17T23:04:44Z pkhuong: does aarch64 have FP instructions, or just a selection of n extensions, all incompatible and incomparable in features?
2015-09-17T23:05:00Z stassats: it even has mandated neon
2015-09-17T23:05:19Z pkhuong: wow
2015-09-17T23:05:42Z stassats: though there still seems to be no fp traps
2015-09-17T23:06:38Z stassats: aarch64 is much saner overall, even has a division instruction
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2015-09-17T23:08:19Z pkhuong: nice. that sounds like a much better backend
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2015-09-18T01:00:27Z jfe: where does sbcl’s asdf extension look for installed systems?
2015-09-18T01:00:48Z stassats: asdf is not an sbcl extension
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2015-09-18T20:17:49Z dougk_: hey, we have a meta-bootstrap problem now.  I upgraded my xcode on mac, and we croak when trying to run determine-endianness because we pass the explicitly wrong value for '-mmacosx-version-min' because genesis/Makefile.features hasn't been written yet, and it's the thing we're trying to create. You can leave out the version-min, and it works, but you can't pass it wrong.
2015-09-18T20:18:39Z dougk_: so after you get through that, LISP_FEATURE_DARWIN9_OR_BETTER is present in Makefile.features, and the rest is fine.
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2015-09-18T20:28:46Z dougk_: I can't see how the relevant change was ever right. Originally there was a separate config.foo for darwin9+.  That was changed to be a lisp feature in local-target-features.lisp-expr.  But local-target-feature.lisp-expr has not been converted into Makefile.features syntax in time to use a Makefile that wants to include that, so it uses the "-include" syntax which means silently do nothing if the file is not present.
2015-09-18T20:33:58Z |3b| wonders how FILL on a displaced array breaks complex exponentiation
2015-09-18T20:35:44Z |3b|: http://paste.lisp.org/+3BWQ
2015-09-18T20:36:31Z stassats: huh what
2015-09-18T20:36:36Z |3b|: on "1.2.4.80-844efff" linux and "1.2.15.31-9c82161" windows, both x8664
2015-09-18T20:36:44Z |3b|: right answer on arm 1.2.13.44
2015-09-18T20:37:15Z |3b|: gets right answer with fill on A or no fill
2015-09-18T20:37:22Z |3b|: or with loop simplified a bit
2015-09-18T20:38:26Z stassats: the results diverge without fill too
2015-09-18T20:38:33Z |3b|: yeah, i guess so
2015-09-18T20:38:58Z |3b|: guess i hadn't tried it with that particular value
2015-09-18T20:40:57Z stassats: (loop for z1 = (complex -0.123 -0.789) return (expt z1 2))
2015-09-18T20:42:45Z stassats: (let (z1) (expt (setf z1 (complex -0.123 -0.789)) 2))
2015-09-18T20:43:38Z |3b|: that at least sounds a bit more reasonable than FILL being involved :)
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2015-09-18T21:01:01Z stassats: so it targets the same register for X, Y, and the result
2015-09-18T21:02:46Z stassats: i have an easy fix, just don't target x to r
2015-09-18T21:04:22Z |3b|: cool, easy fixes are good :)
2015-09-18T21:04:39Z stassats: i'm now looking for a proper fix
2015-09-18T21:06:38Z |3b|: those are good too
2015-09-18T21:07:45Z stassats: there seems to be some sort of a provision when x is equal to r, but it's not correct
2015-09-18T21:07:52Z stassats: equal to r and y
2015-09-18T21:10:11Z stassats: the right fix seems to be to move (move copy-y y) before (inst unpcklps r r)
2015-09-18T21:12:31Z stassats: which it does for the double version
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2015-09-18T21:24:45Z stassats: i now can't write a failing test case for it
2015-09-18T21:26:47Z stassats: sprinkling some speed seems to do the job
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2015-09-18T21:55:43Z stassats: |3b|: fix pushed, good catch
2015-09-18T21:57:50Z |3b| builds
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2015-09-18T23:02:26Z stassats: armv8 has instructions with different rounding for fp to integer conversion
2015-09-18T23:02:30Z stassats: now, which to use
2015-09-18T23:04:11Z stassats: looks like we have different vops too
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2015-09-18T23:08:06Z stassats: ties to even for round
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2015-09-19T17:06:12Z stassats`: started putting things to https://github.com/stassats/sbcl/tree/arm64
2015-09-19T17:06:19Z stassats`: and making small commits now
2015-09-19T17:07:25Z stassats`: now cold-init fails somewhere in make-hash-table, %make-hash-table gets bogus arguments
2015-09-19T17:18:17Z stassats`: and i need a :64-bit feature, #!+#.(cl:if (cl:= sb!vm:n-word-bits 32) '(and) '(or)) is getting seriously annoying
2015-09-19T17:18:36Z stassats`: and there's too much #x86-64 used
2015-09-19T17:19:02Z stassats`: at least porting to ppc64 will be easier, sigh
2015-09-19T17:19:29Z pkhuong: but what about alpha? ;)
2015-09-19T17:20:12Z stassats`: which is already 64 bit but with 32-bit pointers? yeah, that's a lost case
2015-09-19T17:21:35Z stassats`: so, would ":64-bit" a good feature name?
2015-09-19T17:21:40Z nyef: There's a similar memory model for Alpha, too.
2015-09-19T17:21:49Z nyef: Err.. For MIPS.
2015-09-19T17:22:09Z nyef: And, IIRC, a 32-on-64 ABI for amd64 as well.
2015-09-19T17:22:22Z stassats`: yeah
2015-09-19T17:22:40Z nyef is getting very tired of this keyboard. Dreadful roll-up USB thing.
2015-09-19T17:22:58Z stassats`: i'll go with :64-bit, can be changed later
2015-09-19T17:23:35Z stassats`: the only vops left to rework are complex-floats ones, since armv8 has 128-bit simd registers
2015-09-19T17:23:50Z pkhuong: nyef: yeah... I don't think we'd like x32 much. only 32 bits for tagged values sucks
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2015-09-19T17:54:43Z Xof: #!+ is ours, so doesn't actually have to fully respect *features*.  We could have computed feature aliases
2015-09-19T17:54:47Z Xof: just need to keep slime in sync
2015-09-19T17:55:03Z Xof: #!=(sb!vm:n-word-bits 64)
2015-09-19T17:55:14Z stassats`: eh, too much hassle
2015-09-19T17:55:29Z stassats`: not like anyone will be upset by a new feature
2015-09-19T17:55:33Z Xof: I'm a bit upset
2015-09-19T17:55:38Z Xof: about -> <- this much
2015-09-19T17:56:07Z stassats`: ccl has :64-BIT-TARGET and :64-BIT-HOST
2015-09-19T17:56:44Z stassats`: Xof: i'm upset about all the build-only relevant features
2015-09-19T17:57:37Z Xof: yes.  One day I will move them all into sb!int, at least
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2015-09-19T20:37:52Z stassats`: having trouble with tagging undefined_tramp
2015-09-19T20:38:17Z stassats`: it probably should look like on ppc
2015-09-19T20:39:26Z nyef: Very probably, yes.
2015-09-19T20:39:39Z nyef: Specifically, it should NOT look like on sparc or arm.
2015-09-19T20:39:49Z nyef: Or x86oids, really.
2015-09-19T20:40:06Z stassats`: so, in sbcl.nm, should undefined_tramp be tagged?
2015-09-19T20:40:19Z nyef: No, it should not.
2015-09-19T20:40:50Z stassats`: is i tagged on arm?
2015-09-19T20:41:00Z nyef: It should be on arm.
2015-09-19T20:41:07Z stassats`: ok
2015-09-19T20:51:01Z stassats`: is raw-addr tagged too?
2015-09-19T20:56:44Z stassats`: that would be no, and it makes more sense
2015-09-19T20:58:48Z stassats`: that explains why my cold-init broke in a different place, i removed arm64 from a (and arm sparc)
2015-09-19T20:59:20Z stassats`: accidentally
2015-09-19T20:59:35Z stassats`: at least now i resolved the lipness of function calls
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2015-09-19T21:08:40Z stassats`: now i'm having a tagged PC somewhere
2015-09-19T21:09:30Z stassats`: looks like an ordinary function call, undefined functions started to work, but not defined ones
2015-09-19T21:10:42Z stassats`: maybe a tail or something from assembly routines
2015-09-19T21:10:47Z stassats`: call
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2015-09-19T21:19:58Z stassats`: wrote a thingy that parses sbcl-cold.map to find functions
2015-09-19T21:20:01Z stassats`: quite useful
2015-09-19T21:26:39Z stassats`: stupid gdb disassembly viewer can't scroll up, only down, this is infuriating
2015-09-19T21:51:11Z stassats`: i'm now back to %make-hash-table failing with type errors
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2015-09-19T22:01:45Z stassats`: somehow a saved variable gets overwritten, maybe a corrupted CFP
2015-09-19T22:04:22Z stassats`: and that's after a call to make-array
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2015-09-19T22:35:23Z stassats`: it was #16 instead of #-16 when restoring things from the stack, sigh
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2015-09-20T19:05:04Z stassats`: nyef: when i jump through LIP, does any other register have to contain the corresponding tagged value?
2015-09-20T19:11:27Z stassats`: i would think yes, otherwise it won't be able to find the real thing
2015-09-20T19:11:48Z stassats`: but what happens with fdefn->raw-addr
2015-09-20T19:50:55Z stassats`: argh, gdb TUI single key mode can't do step-instruction
2015-09-20T19:50:57Z stassats`: just step
2015-09-20T19:55:38Z stassats`: huh, just accidentally found out that RET does even without single key mode
2015-09-20T19:55:39Z stassats`: neat
2015-09-20T19:57:08Z stassats`: now for a "run-until"
2015-09-20T19:57:40Z nyef: The FDEFN raw-addr is either a trampoline, thus in the runtime, or is pinned by the FDEFN-FUN.
2015-09-20T20:00:28Z stassats`: oh, RET repeat the previous command in the command line
2015-09-20T20:00:42Z stassats`: finding what gdb does is just as tricky as debugging itself
2015-09-20T20:01:06Z nyef: Not pinned. Pinned is the wrong word. "Backed", maybe.
2015-09-20T20:04:15Z nyef: Also note that the GC has special support for FDEFN objects on most platforms, specifically for the raw-addr. Likewise PURIFY, which caused me some trouble on ARM, but is unlikely to cause you such trouble.
2015-09-20T20:04:30Z stassats`: i'm jumping straight into gengc
2015-09-20T20:05:28Z nyef: ... Am I going to have to add the cheneygc support to your port, to complement your adding gencgc to mine? (-:
2015-09-20T20:06:01Z stassats`: is cheneygc still working on arm32? i meant to check but never got around it
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2015-09-20T20:06:39Z stassats`: and i'm back to a next cold-init error after butchering calls when transitioning to untagged calls
2015-09-20T20:08:11Z stassats`: putting stuff at https://github.com/stassats/sbcl/tree/arm64
2015-09-20T20:09:29Z stassats`: for some reason i get corrupted arg calls for some functions
2015-09-20T20:10:05Z stassats`: specifically when allocating structures, huh
2015-09-20T20:16:52Z stassats`: all they have in common: they have a declaration
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2015-09-20T20:28:32Z stassats`: ok, i think using fixnumized numbers as stack offsets is doubly wrong
2015-09-20T21:09:33Z stassats`: and the instances of such are hard to find
2015-09-20T21:13:11Z nyef: Fixnumized numbers as stack offsets? Yeah, that's not right on 64-bit. But you should be able to mask it by setting n-fixnum-tag-bits to 3.
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2015-09-20T21:27:53Z stassats`: i can also fix it by pushing :arm into *features* instead of :arm64
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2015-09-20T22:50:45Z stassats`: looks like i weeded out all the word-fixnums->unsigned-bytes from more args
2015-09-20T22:50:52Z stassats`: onto the next error
2015-09-20T22:51:12Z stassats`: or the old one, %make-hash-table, even though it doesn't have more args
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2015-09-21T10:40:43Z yvm: Hi. Why do SBCL's debugger complains that one of argument in define-alien-routine has :out style and (* int) type? Manual says :out-styled arguments must be pointers.
2015-09-21T10:51:37Z yvm: Oh, sorry, my fault.
2015-09-21T10:52:01Z yvm: >_cannot_ be used with pointers
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2015-09-21T15:37:43Z stassats`: some more n-fixnum-tag-bits/word-shift confusion resolved, some more self induced breakage during the conversion to untagged calls
2015-09-21T15:37:50Z stassats`: and now to the next failure
2015-09-21T16:28:52Z stassats`: another word-shift/n-fixnum-tag-bits, goddamn it!
2015-09-21T16:29:52Z nyef: I somehow feel as though I should apologize.
2015-09-21T16:30:20Z stassats`: i should backport all the changes to arm too
2015-09-21T16:30:35Z stassats`: nyef: i think it came over before arm
2015-09-21T16:30:48Z nyef: Why? It's not like we did for any other backend when we sorted them all out for amd64.
2015-09-21T16:31:13Z nyef: (And by "we", I mean pkhuong and I.)
2015-09-21T16:32:04Z nyef: So, in a very real way, twice over, it's my fault that you're having to do this, since I wrote most of the original ARM backend, and I'm the one who did most of the 63-bit-fixnum work.
2015-09-21T16:35:50Z stassats`: after fixing that, another failure in the same function
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2015-09-21T18:15:25Z stassats`: i don't get why https://github.com/sbcl/sbcl/blob/master/src/code/target-package.lisp#L620-L625 does DECF
2015-09-21T18:15:39Z stassats`: i get an error saying it's not an index, since -deleted is 0
2015-09-21T18:16:59Z stassats`: i may be just accessing ub8 wrong
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2015-09-21T18:32:16Z scymtym_: stassats`: maybe the package-hashtable-cells array is not properly initialized to :initial-element 0?
2015-09-21T18:33:20Z stassats`: it is, something else is wrong
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2015-09-21T20:52:47Z stassats`: sigh, made an lsl/lsr typo
2015-09-21T20:53:44Z stassats`: past that add-symbol problem, still in !package-cold-init
2015-09-21T20:54:02Z stassats`: this is moving too slow
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2015-09-21T21:45:43Z nyef: At least you're making progress, right?
2015-09-21T21:45:54Z stassats`: at least
2015-09-21T21:46:29Z nyef: And you're allowed to say "that's good enough for now" and take a break for a couple of months, aren't you?
2015-09-21T21:50:41Z stassats`: not really
2015-09-21T21:52:29Z nyef: Oh? Getting paid for doing this?
2015-09-21T21:52:44Z nyef: Or is there a literal deadline on it for you?
2015-09-21T21:53:45Z stassats`: neither, but a) i want to get it finished b) any delays will cause me to forget what i already did and how things work c) i will get more rusty when debugging it
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2015-09-21T22:07:33Z stassats`: and d) i would have more stuff to merge
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2015-09-22T05:26:48Z yvm: Is it possible to list opened by sbcl processes filestreams/descriptors?
2015-09-22T05:29:03Z yvm: s/sses/ss/
2015-09-22T05:29:24Z flip214: yvm: "lsof -p <pid>" on linux
2015-09-22T05:29:33Z flip214: or "ls -la /proc/<pid>/fd"
2015-09-22T05:30:11Z yvm: But I would like to gently close it then.
2015-09-22T05:31:39Z yvm: I can access to process with gdb, of cource, but it would be more cool to close it by sbcl's debugger for example.
2015-09-22T05:36:34Z flip214: yvm: I use gdb for such things, with a one-line bash script ;)
2015-09-22T05:51:26Z flip214: yvm: but if you get into the debugger, calling (sb-posix:close N) for the file descriptor should give the same result
2015-09-22T05:51:40Z yvm: Yep, just figured it out.
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2015-09-22T12:14:00Z stassats`: have no idea why stp x30,x14,[sp,#-16]! would sigbus
2015-09-22T12:14:11Z stassats`: there's plenty space on the stack
2015-09-22T12:14:47Z stassats`: maybe some wrong encoding
2015-09-22T12:17:26Z stassats`: nope, gcc produces the same encoding
2015-09-22T12:18:45Z pkhuong: unaligned stack?
2015-09-22T12:18:54Z nyef: Yeah, stack alignment would be my next guess.
2015-09-22T12:19:19Z nyef: Or having used the stack pointer as a temporary somewhere. (-:
2015-09-22T12:20:50Z stassats`: sp is 0x7ffffff028
2015-09-22T12:20:54Z stassats`: which is word aligned
2015-09-22T12:21:55Z stassats`: A misaligned stack pointer is where bits[3:0] of the stack pointer are not 0b0000, when the stack pointer is used as the base address of the calculation, regardless of any offset applied by the instruction.
2015-09-22T12:21:58Z stassats`: oh well
2015-09-22T12:22:23Z stassats`: i didn't expect a hard requirement on double-word alignment
2015-09-22T12:23:46Z stassats`: at least it gets misaligned within the same function
2015-09-22T12:24:08Z stassats`: and i see sub x23,sp,#0x8
2015-09-22T12:25:31Z pkhuong: so many wtfs
2015-09-22T12:26:12Z stassats`: didn't change +number-stack-alignment-mask+
2015-09-22T12:26:34Z stassats`: which i introduced myself in arm32
2015-09-22T12:27:36Z pkhuong: can we use the same code on the control stack?
2015-09-22T12:28:00Z stassats`: we can't align the control stack
2015-09-22T12:29:00Z stassats`: see the reason: https://github.com/sbcl/sbcl/commit/bfcfd35061afa2709fee47c4e09c3dcc40b2147d
2015-09-22T12:29:33Z stassats`: all those vops would have to be changed to save the number
2015-09-22T12:31:18Z stassats`: ok, back to an old error of strange things returned from gethash
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2015-09-22T12:37:49Z nyef: You're... doing the cgc thing?
2015-09-22T12:42:47Z stassats`: what do you mean?
2015-09-22T12:44:05Z nyef: c-stack-is-control-stack is gencgc, not gengc.
2015-09-22T12:44:20Z nyef: Oh! This is x86-64.
2015-09-22T12:44:35Z stassats`: but the control stack can't be aligned on either
2015-09-22T12:44:37Z nyef: Clearly, I'm not quite fully awake yet.
2015-09-22T12:44:49Z stassats`: but c-stack-is-control-stack has to be sometimes aligned, sometimes misaligned
2015-09-22T12:45:17Z nyef: I know on 32-bit ARM, we are (or were?) using a separate control stack.
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2015-09-22T14:34:09Z stassats`: in a variable, luckily, on arm64 it lives in its own register
2015-09-22T14:38:45Z nyef: Yes, well, I really could have done with two or three more registers. /-:
2015-09-22T14:47:28Z stassats`: if linux played nicely, there is a machine register available, but it seems to be shared across threads on linux
2015-09-22T14:48:54Z stassats`: though it's not usable for offsets or similar
2015-09-22T14:49:31Z stassats`: ccl is precise even on x86, so all that are just lame excuses
2015-09-22T15:08:37Z joshe: doesn't ccl use sse regs on x86?
2015-09-22T15:09:30Z stassats`: not that i heard of
2015-09-22T15:10:43Z joshe: I had thought that's how it got around the register pressure
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2015-09-22T15:21:34Z nyef: joshe: My understanding is that they have a rather different model of operation, possibly including register or stack maps.
2015-09-22T15:22:33Z joshe: oh, interesting
2015-09-22T15:24:35Z nyef: It's been a while since I looked into it, though, and my memory is a bit hazy, so I could be very wrong about this.
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2015-09-22T15:25:46Z joshe: well the closest I'd ever get is context switch code in C, so...
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2015-09-22T15:29:19Z stassats`: they do have maps
2015-09-22T15:29:34Z stassats`: and ccl (or rather openmcl) used to be x86-64 only for some time
2015-09-22T15:29:42Z stassats`: (as well as the original ppc)
2015-09-22T15:30:21Z stassats`: and i think there were some recent changes to register allocation
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2015-09-22T16:08:35Z stassats`: "unexpected special form %PRIMITIVE"
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2015-09-22T19:32:20Z stassats: now a strange sigsegv
2015-09-22T19:32:30Z Xof: so much progress
2015-09-22T19:33:04Z stassats: i'm upto character-cold-init
2015-09-22T19:34:29Z stassats: could that be a gengc barrier?
2015-09-22T19:34:42Z Xof: that's a reasonable amount of working lisp code
2015-09-22T19:36:02Z stassats: because gdb can read that address, and i'm writing there
2015-09-22T19:36:20Z stassats: i need to write a /proc/maps parser
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2015-09-22T19:37:35Z Xof: I was just going to say, look at /proc/<pid>/maps
2015-09-22T19:37:45Z Xof: but I just looked at /proc/<pid>/maps and it makes no sense
2015-09-22T19:38:09Z Xof: no, wait, my mistake
2015-09-22T19:38:17Z Xof: stopped at the SIGUSR1 signal
2015-09-22T19:39:12Z Xof: it could in principle be a barrier, though I might have expected you would have come across one before now
2015-09-22T19:39:35Z stassats: i may have, but this one gets broken
2015-09-22T19:39:48Z stassats: i get a control stack guard unprotected
2015-09-22T19:39:53Z stassats: or
2015-09-22T19:39:55Z stassats: hm
2015-09-22T19:40:12Z stassats: i disabled handling sigsegvs in gdb, now i enabled to catch that control guard
2015-09-22T19:40:21Z stassats: so, i guess that's a false positive
2015-09-22T19:41:50Z stassats: now to convince gdb to print PC from sigsegv without stopping
2015-09-22T19:42:30Z stassats: does nobody who writes gdb actually uses it or something?
2015-09-22T19:44:18Z stassats: my solution: stop on sigsegv, enter single key mode and put a paperweight on the C key
2015-09-22T19:44:42Z nyef: I think it's more that nobody who works on gdb actually expects anybody to deal with SIGSEGV by doing anything other than crashing.
2015-09-22T19:49:14Z stassats: my debugging setup: http://i.imgur.com/VmZLJ4j.jpg
2015-09-22T19:49:44Z Xof: nice thinkpad
2015-09-22T19:52:05Z stassats: looks like i've blown past it
2015-09-22T19:52:12Z stassats: i need to write a log from gdb
2015-09-22T19:52:53Z joshe: script(1) ?
2015-09-22T19:53:25Z joshe: seems appropriate to your current setup :)
2015-09-22T19:54:22Z stassats: joshe: retaining ring pliers are easier to arrange
2015-09-22T19:59:06Z stassats: success, it's in the throw assembly routine
2015-09-22T20:02:44Z chris2: you can define a script that runs on signal i think?
2015-09-22T20:03:28Z stassats: i can also write my own debugger
2015-09-22T20:10:16Z stassats: tail-call-variable, i can't count
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2015-09-22T20:11:56Z stassats: guess who, n-fixnum-tag-bits/word-shift
2015-09-22T20:16:20Z nyef: Heh.
2015-09-22T20:16:33Z nyef: You're going to test with n-fixnum-tag-bits of 2 at some point, right?
2015-09-22T20:16:50Z stassats: dunno
2015-09-22T20:17:05Z stassats: when i'm past the ideas on how to torture myself
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2015-09-22T20:27:59Z Xof: think of this as great work towards the alpha64 port
2015-09-22T20:28:07Z Xof: (which I almost had running... 12 years ago)
2015-09-22T20:29:07Z stassats: when, and if, i get around to the ppc64 port, i'll make sure to go through all vops and make everything fixnum-tag-bits and word-shift independent
2015-09-22T20:29:40Z stassats: of the ppc32 port first
2015-09-22T20:30:15Z stassats: should have done that to arm32
2015-09-22T20:35:50Z stassats: somehow tail-call-variable is called with something wrong too
2015-09-22T20:36:06Z stassats: the difference between args and csp is 28, which isn't divisible by 8
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2015-09-22T21:00:00Z nyef: Xof: For alpha64, would it be better to start from where you left off, or to start over?
2015-09-22T21:03:21Z stassats: to the next error
2015-09-22T21:13:39Z stassats: for some reason with-hashtable-locks breaks things, commenting it out and skipping ahead
2015-09-22T21:13:52Z stassats: hoping to see an easier failure which will also fix with-hashtable-locks
2015-09-22T21:15:39Z stassats: didn't help this time
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2015-09-22T21:17:00Z nyef: Are hashtables the first use of unboxed arrays, or unboxed structure slots, or something like that?
2015-09-22T21:18:17Z stassats: something like that, but i think those work, but with-hashtable-locks adds some closures, unwind-protect, etc.
2015-09-22T21:18:35Z nyef: Check your closure-tramp, then?
2015-09-22T21:19:46Z stassats: it's probably still tagged
2015-09-22T21:23:28Z nyef: With the ARM port, I made sure to exercise the throw / catch, unwind, and unwind-protect machinery very early on, using that bootstrap file.
2015-09-22T21:24:20Z stassats: i'm pin pointing things in the bootstrap file as i catch them
2015-09-22T21:26:50Z stassats: or when i'm out of ideas
2015-09-22T21:28:24Z nyef: Hrm... QEMU does aarch64?
2015-09-22T21:28:35Z stassats: i think it does
2015-09-22T21:29:15Z stassats: describe-internal-error keeps printing bogus sc-offset values
2015-09-22T21:31:07Z stassats: os_context_register_addr seems to be working for other things
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2015-09-22T21:57:41Z Xof: nyef: good question.  I would expect most of the backend work to apply more-or-less directly (stuff in src/compiler/alpha and src/assembly/alpha)
2015-09-22T21:57:55Z Xof: and at least most of it was basically right (it ran all the way through cold-init)
2015-09-22T21:58:18Z Xof: I'd hope that most of the remaining 64-bit issues have been found since then :-)
2015-09-22T22:01:09Z nyef: Hmm.
2015-09-22T22:01:34Z stassats: the hardest problem is getting a working alpha
2015-09-22T22:02:05Z nyef: Yeah, I have a couple of alphas, but I don't know how close to working they might be.
2015-09-22T22:02:13Z nyef: They'll definitely need a fresh Linux install.
2015-09-22T22:03:08Z Xof: having a NEWS item that says "the alpha port now uses 64-bit pointers" would be hilarious
2015-09-22T22:03:42Z stassats: so it would be a change to the existing port, not a new target?
2015-09-22T22:03:44Z nyef: Almost as hilarious as having threading support.
2015-09-22T22:03:55Z stassats: maybe someone still wants a 32-bit alpha64 port!
2015-09-22T22:04:40Z nyef: I want to see the 32-bit alpha backend maintained, but it might be possible to do it with "just" a feature flag.
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2015-09-22T22:13:20Z stassats: something wrong with the index-vector
2015-09-22T22:14:03Z stassats: doesn't look like it's filled with zeros
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2015-09-22T22:21:57Z stassats: but allocated arrays seem to be zero filled
2015-09-22T22:22:14Z stassats: though i discovered that a full call to AREF crashes, but that's my culprit right now
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2015-09-22T22:35:22Z stassats: aref is not working befure the table with aref accesors is not yet done
2015-09-22T22:49:18Z stassats: so, yeah, on the third hash table, make-array does not create a zero filled array
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2015-09-22T23:03:28Z stassats: i messed up the allocation macro when it was already working
2015-09-22T23:04:05Z stassats: i should refrain from optimizing before everything is working
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2015-09-22T23:09:26Z stassats: the array is still filled with garbage
2015-09-22T23:16:19Z stassats: alloc() eventually gives garbage
2015-09-22T23:31:21Z stassats: is something corrupting the heap?
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2015-09-22T23:41:17Z joshe: nyef: why would you want the existing alpha port preserved?
2015-09-22T23:44:18Z nyef: joshe: Because it occupies an unusual part of the system design space, and I believe that preserving that specific flexibility is important.
2015-09-22T23:46:03Z joshe: hm
2015-09-22T23:46:13Z joshe: well that's one way of putting it ;)
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2015-09-23T05:24:13Z yvm: How SBCL developers community look at supporting linux features, which are not correspond to POSIX?
2015-09-23T05:40:13Z Fare: there are plenty of #+linux features in sb-posix and other extensions
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2015-09-23T06:03:26Z yvm: All are in sb-bsd-sockets directory.
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2015-09-23T06:58:07Z flip214: yvm: which feature are you talking about?
2015-09-23T06:59:55Z yvm: flip214, ioctl's request according to man ioctl on my system is unsigned long. sb-posix:ioctl accepts int.
2015-09-23T07:01:02Z flip214: int or integer? is there really a mismatch on your machine?
2015-09-23T07:01:31Z Shinmera: What system are you on?
2015-09-23T07:03:44Z yvm: >  (define-call-internally ioctl-with-pointer-arg "ioctl" int minusp
2015-09-23T07:04:07Z yvm: Linux 4.1.0-1-amd64
2015-09-23T07:09:22Z Shinmera: Hmm.
2015-09-23T07:10:14Z Shinmera: My /usr/include/sys/ioctl.h also lists an `unsigned long int __request`.
2015-09-23T07:10:28Z Shinmera: Though the man pages definitely show just `int request`.
2015-09-23T07:10:49Z flip214: well, TBH, I can't really believe that such a *bug* would still be hiding on amd64.
2015-09-23T07:11:06Z Xof: well, how many ioctls are there?
2015-09-23T07:11:10Z flip214: lots of software uses ioctl ... sb-bsd-sockets is one example, I guess
2015-09-23T07:11:15Z Xof: are we really up to the 2^32nd ioctl?
2015-09-23T07:11:52Z jackdaniel: ^_^
2015-09-23T07:12:23Z yvm: > An  ioctl()  request  has  encoded in it whether the argument is an in parameter or out parameter, and the size of the argument argp in bytes.
2015-09-23T07:12:31Z yvm: From man ioctl.
2015-09-23T07:14:38Z Xof: true.  But the total size is still 32 bits
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2015-09-23T07:14:51Z Xof:  * size of the parameter structure in the lower 14 bits of the
2015-09-23T07:14:51Z Xof:  * upper 16 bits.
2015-09-23T07:15:16Z Xof: so, what is the actual issue here?
2015-09-23T07:15:32Z Xof: do you have a test case where something is wrong?
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2015-09-23T07:40:52Z yvm: Well, sb-posix:ioctl doesn't accept unsigned long values. ash'ing it doesn't help: kernel keeps telling me "Permission denied (13)", but I'm not sure I cut off right bits.
2015-09-23T07:41:49Z Xof: do you need to pass an unsigned long value?
2015-09-23T07:41:57Z yvm: Yep.
2015-09-23T07:42:11Z yvm: C program does.
2015-09-23T07:42:15Z Xof: for which ioctl?  (and given that asm/ioctl.h says that everything fits in 32 bits, why?)
2015-09-23T07:47:10Z yvm: DRM_IOCTL_GET_CAP which is defined in drm.h.
2015-09-23T07:49:11Z yvm: It fits in 32 bits.
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2015-09-23T08:16:07Z pkhuong: yvm: define your own ioctl function with sb-alien, like sb-posix does for pointers.
2015-09-23T08:16:31Z pkhuong: alternatively, make a SAP from the long you want to pass and pretend it's a pointer.
2015-09-23T08:17:33Z pkhuong: $reasons involving the SysV ABI and x86-64's semantics and SBCL's code generator, the int/unsigned long mismatch for __request shouldn't be an issue
2015-09-23T08:19:11Z yvm: Ok.
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2015-09-23T12:42:33Z stassats: looking at the heap corruption, only the low two bytes are set
2015-09-23T12:44:33Z stassats: venturing further up the heap i see the address to inside sb!int:uncross, and a lot of it, just repeated
2015-09-23T12:45:30Z stassats: printing it says %empty-ht-slot%
2015-09-23T12:45:46Z stassats: ok, that at least makes sense
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2015-09-23T13:10:10Z stassats: i like the /can't /STest oftconnOT-N_\o [dWntowor orthi ti{sexp g|ue]
2015-09-23T13:10:14Z stassats: part
2015-09-23T13:10:17Z stassats: from sb-show
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2015-09-23T13:30:35Z stassats: var-alloc seems to be broken
2015-09-23T13:59:38Z stassats: triggering var-alloc usage is not easy
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2015-09-23T15:07:07Z stassats: can't make sens of it, do make-array-header and make-array-header/c calculate different size on x86-64?
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2015-09-23T15:13:28Z stassats: should be array-dimensions-offset not (1+ array-dimensions-offset), since it needs to allocate one less, so it's already 1+ for the alignment mask
2015-09-23T15:13:52Z stassats: and i was trying to match my arm64 version to it, sigh
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2015-09-23T15:17:41Z stassats: same thing on x86
2015-09-23T15:21:22Z stassats: is it broken everywhere?
2015-09-23T15:21:30Z stassats: or maybe make-array-header/c is broken instead?
2015-09-23T15:29:37Z stassats: yeah, it is wrong everywhere
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2015-09-23T15:54:24Z stassats: oh my, it was me who added make-array-header/c
2015-09-23T15:54:37Z stassats: now i don't know what right and what's wrong anymore
2015-09-23T15:55:13Z flip214: stassats: look at git history, perhaps that'll tell you
2015-09-23T15:55:38Z stassats: what will it tell me?
2015-09-23T15:55:44Z jackdaniel: the truth
2015-09-23T15:55:53Z jackdaniel: *THE* truth
2015-09-23T15:56:23Z stassats: make-array-header/c wasn't added by somebody smarter, so it may have been coming from the same wrong conclusion
2015-09-23T15:57:09Z stassats: but it's been working for 8 months, there's that
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2015-09-23T16:00:26Z flip214: stassats: facts beat guessing every time
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2015-09-23T16:03:28Z stassats: if it made sense back then and it makes sense now, probably it does make sense after all
2015-09-23T16:03:49Z stassats: almost forgot we're in a freeze
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2015-09-23T16:27:35Z stassats: done with make-array-header, but still have bad heap data
2015-09-23T16:36:24Z stassats: i think i know, it first happens in during make-random-state, and it uses ub32 arrays, and i think i have those broken
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2015-09-23T16:48:24Z Xof: not that it's an excuse, but we really should use mt19337-64 on 64-bit
2015-09-23T16:52:42Z stassats: need to introduce 32-bit-register storage class
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2015-09-23T16:56:34Z Xof: people here might have an opinion
2015-09-23T16:57:06Z Xof: if you were teaching a short module on language design and implementation to final-year undergraduates, what would you put in it?
2015-09-23T16:59:00Z Xof: pkhuong should have an opinion even if no-one else does
2015-09-23T16:59:24Z stassats: i can imagine it should include some assembly
2015-09-23T16:59:40Z nyef: I can imagine it should include something about why PHP is dreadful.
2015-09-23T16:59:59Z Xof: :-)
2015-09-23T17:06:48Z nyef: Also perhaps compare Haskell or one of the MLs, Forth, Lisp or Scheme, Smalltalk, Prolog, and one or more of the descendants of Algol for examples of different sets of core principles in language design?
2015-09-23T17:08:04Z nyef: Oh, and INTERCAL!
2015-09-23T17:08:29Z nyef: And maybe RPG-IV.
2015-09-23T17:13:05Z flip214: where's BASIC in that list? the old one, with line numbers, not that modern stuff.
2015-09-23T17:16:11Z Xof: bear in mind you only have 10 weeks
2015-09-23T17:17:55Z flip214: how many hours a week? 40?
2015-09-23T17:18:58Z nyef: I have no idea how much you can get done in a 10 week course.
2015-09-23T17:19:29Z flip214: well, with 2 hours a week a lot less than with 10 or 20
2015-09-23T17:19:30Z nyef: Maybe have something about the sort of features that make it hard to write a compiler for a language, rather than an interpreter?
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2015-09-23T17:32:14Z pkhuong: Xof: we should use sfmt on x86-64 ;)
2015-09-23T17:33:54Z pkhuong: Xof: I think I'd have two goals: 1. make the practice boring by having them write and implement a bunch of languages; 2. hammer home the importance of *not* being general purpose
2015-09-23T17:35:10Z Xof: I certainly can get on board with 2
2015-09-23T17:36:05Z Xof: (the context here is the depressing discovery that I have to cover for a member of staff's medical leave, and the further discovery that the entire course materials he has are essentially snippets from the dragon book)
2015-09-23T17:36:43Z pkhuong: re implementation, I think writing your own native code thing is always magical
2015-09-23T17:37:14Z pkhuong: and linear traces let you do really interesting stuff without solving NP hard problems all the time
2015-09-23T17:38:54Z Xof: true
2015-09-23T17:39:18Z Xof: alright.  Meanwhile I had better go and teach myself all this 1980s compiler technology that I might have to bluff about in a week
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2015-09-23T18:08:53Z stassats: i think i got fixed that heap corruption with some 32-bit arefs
2015-09-23T18:16:08Z stassats: i can use PRINT during cold-init, neat
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2015-09-23T18:16:24Z Shinmera: Sounds like great progress is being made.
2015-09-23T18:16:45Z stassats: i'm still in !character-database-cold-init
2015-09-23T18:16:51Z stassats: apply on lists seems to be broken
2015-09-23T18:20:40Z stassats: that's an easy fix
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2015-09-23T19:33:44Z Fare: Have Googlers published their patches to SBCL yet? Would they be welcome upstream?
2015-09-23T19:34:23Z Xof: which patches?
2015-09-23T19:59:28Z stassats: i never liked the define-full-call macro
2015-09-23T19:59:43Z stassats: so many differences that it'd be easier to write everything separately
2015-09-23T20:00:52Z fe[nl]ix: Xof: there's a change to the build process, that generates a libsbcl.a before linking the runtime
2015-09-23T20:01:38Z fe[nl]ix: that allows linking other static libraries and when creating a binary, because everything is statically linked here
2015-09-23T20:02:05Z stassats: now to !unicode-properties-cold-init
2015-09-23T20:02:19Z fe[nl]ix: and IIRC there are some GC improvements by Martin Cracauer
2015-09-23T20:03:16Z stassats: skipping over !unicode-properties-cold-init gets up to !set-up-structure-object-class
2015-09-23T20:04:43Z Xof: Martin Cracauer has commit access
2015-09-23T20:04:54Z Xof: if the gc improvements are done he can just commit them
2015-09-23T20:05:51Z fe[nl]ix: it's more about receiving permission to publish them and forward-porting because we're on a rather old version in production
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2015-09-23T20:18:15Z stassats: a full call to map during unicode initialization
2015-09-23T20:19:48Z stassats: which calls csubtypep, which fails
2015-09-23T20:22:13Z stassats: or even, doing (specifier-type 'list)
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2015-09-23T20:48:36Z Fare: there's also the fast interpreter (or has it been committed upstream already?)
2015-09-23T20:49:02Z Xof: no
2015-09-23T20:49:33Z Fare: one problem is that dougk is not officially in the QPX team anymore.
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2015-09-23T20:50:07Z Fare: but hey, neither am I.
2015-09-23T20:50:36Z Fare: I specifically wanted the linkkit to be published, so it can be used with either asdf or bazel.
2015-09-23T20:50:54Z Fare: although, for bazel, the fast interpreter would be good, too.
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2015-09-23T21:12:36Z stassats: i'm now executing top-level forms
2015-09-23T21:12:52Z stassats: falling over around %target-defstruct
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2015-09-23T23:00:12Z pkhuong: are the GC patches still non-reentrant?
2015-09-23T23:13:35Z Fare: I ping'ed cracauer and updating the in-house SBCL then pushing the patches upstream is next on his TODO list after perf season
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2015-09-24T08:40:15Z ralt: hi
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2015-09-24T08:41:32Z ralt: is there a (maybe sbcl-specific) way to write to a file without filesystem buffers?
2015-09-24T08:41:37Z ralt: as in, open(2) with O_SYNC
2015-09-24T08:43:51Z ralt: am I guessing correctly that (finish-output <file stream>) is not really correct?
2015-09-24T08:52:39Z flip214: ralt: you could use osicat and use the posix api
2015-09-24T08:55:14Z ralt: flip214: googling
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2015-09-24T09:04:37Z ralt: flip214: going with sb-posix:fsync, actually, much more convenient.
2015-09-24T09:04:57Z ralt: using with-open-file and calling (sb-posix:fsync (sb-sys:fd-stream-fd f)) at the end is good enough
2015-09-24T09:06:04Z ralt: probably going to wrap it in a (with-sync-open-file) macro
2015-09-24T09:09:33Z p_l: ralt: you could probably implement your own stream class and re-implement finish-output in terms of fsync :)
2015-09-24T09:11:17Z ralt: that sounds like *a lot* of work :)
2015-09-24T09:15:17Z flip214: p_l: it shouldn't, just inherit and do a :after method...
2015-09-24T09:16:12Z ralt: flip214: with-open-file will still return an fd-stream though, won't it?
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2015-09-24T09:24:08Z Xof: with some work you can make it open other stuff
2015-09-24T09:24:17Z Xof: there's a super sekrit :class keyword option to cl:open
2015-09-24T09:25:08Z Xof: hm, mind you that seems to have been not implemented with maximal flexibility
2015-09-24T09:26:59Z ralt: yeah... if I have to rewrite my own with-open-file... there's not much point
2015-09-24T09:27:12Z ralt: I'd rather just write a macro around with-open-file using sb-posix:fsync at the end
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2015-09-24T09:47:17Z ralt: Xof: p_l: flip214: ftr, what I end up using: http://paste.lisp.org/display/155696
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2015-09-24T14:24:33Z Xof: fun anniversary we missed: a few months ago, the sbcl releases post-whn reached WHN's total
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2015-09-24T16:49:19Z dougk_: Fare: i'm making good progress on upstreaming the fast interpreter
2015-09-24T16:50:43Z Xof: great
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2015-09-24T16:53:50Z pkhuong: dougk_: awesome
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2015-09-24T17:23:53Z Shinmera: I'm a bit perplexed by the behaviour of sb-ext:run-program. Can someone explain to me why it works the way it does and/or how to work around it? http://paste.lisp.org/display/155704
2015-09-24T17:24:34Z Shinmera: I can't seem to find anything in the manual about it.
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2015-09-24T17:32:04Z stassats: Shinmera: something needs to perform the reading
2015-09-24T17:32:13Z stassats: if you don't wait, nothing does that
2015-09-24T17:32:35Z stassats: sb-sys:serve-all-events would do that
2015-09-24T17:33:08Z Shinmera: Hmm. That name seems 'global'. Is there a way to perform the reading for that particular process?
2015-09-24T17:33:24Z stassats: use :output :Stream
2015-09-24T17:33:33Z Shinmera: Alright.
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2015-09-24T17:40:02Z dougk_:  so somewhat ironically the llvm project (which I'm now on) has just discovered that they're passing the wrong version-min for MacOS xcode 7
2015-09-24T17:40:30Z dougk_: before release, somebody should fix the hack that I put in make-config.sh or whatever (maybe not that file)
2015-09-24T17:41:17Z dougk_: that is, before the SBCL release. nothing to do with llvm except the coincidence
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2015-09-24T19:06:16Z Xof: what should the fix be?
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2015-09-24T19:24:52Z stassats: so apparently calling specifier-type in cold-init is not going to work
2015-09-24T19:25:13Z stassats: and yet there's a full call to MAP coming from unicode-properties-cold-init
2015-09-24T19:25:43Z stassats: why wouldn't (map 'simple-string #'code-char) be transformed?
2015-09-24T19:26:26Z dougk_: unicode-properties-cold-init calls %map doesn't it?
2015-09-24T19:26:45Z stassats: yes
2015-09-24T19:26:45Z dougk_: the specifier-type call occurs only if you need to do the "extra careful really paranoid" final check
2015-09-24T19:26:52Z dougk_: because %map recognizes certain atoms without parsing them
2015-09-24T19:27:06Z dougk_: so the full call is to %MAP, not MAP, right ?
2015-09-24T19:27:53Z stassats: there's a call to specifier-type either way
2015-09-24T19:27:59Z Xof: (safety 3) might interfere with the transform in some cases
2015-09-24T19:28:17Z dougk_: Xof: I don't know, but there is a MACOSX_DEPLOYMENT_TARGET env var which is the actual way to default that to something
2015-09-24T19:28:36Z dougk_: so maybe I should just rename my 'SBCL_blah' to the real thing and say if you're building on MacOS you just have to know what you're doing
2015-09-24T19:28:55Z stassats: calling (specifier-type 'list) from cold-init in x86-64 fails
2015-09-24T19:29:09Z dougk_: basically I had a fix that was correct all the way up to building defs-to-lisp in the sb-govel contrib
2015-09-24T19:29:10Z stassats: but unicode-properties-cold-init obviously works
2015-09-24T19:29:33Z stassats: and on arm64, unicode-properties-cold-init crashes around specifier-type
2015-09-24T19:29:55Z dougk_: yes, specifier-type fails that early. it's on my list of things I'd like to make work, by dumping CTYPE objects as constants based on the the host build up
2015-09-24T19:30:33Z dougk_: but that's just an optimization as I viewed it. There was no case where it was a "gotta have it" thing, as I experienced.
2015-09-24T19:30:59Z dougk_: can you try chaning the call to %MAP ?
2015-09-24T19:31:28Z dougk_: I believe you're crashing at (map (lambda (item) (map 'simple-string ...)) if i'm not mistaken?
2015-09-24T19:31:47Z stassats: i skipped over unicode-properties-cold-init, but encountered a specifier-type crash when doing tlfs
2015-09-24T19:32:04Z stassats: but of a different flavour
2015-09-24T19:32:07Z stassats: let me go back to unicode-properties-cold-init
2015-09-24T19:32:35Z dougk_: this may not tell you anything you don't already know, but there's a "#+nil" in compiler/main.lisp that you can change as per the comment there, and it will tell you during cold-init each file whose TLFs it go through successfully
2015-09-24T19:32:55Z dougk_: it basically synthesizes a (write-string "Done with file foo") after each file, and compiles that as a cold tlf.
2015-09-24T19:33:07Z stassats: noticed that it was me who made %map not call subtypep on some types
2015-09-24T19:33:17Z dougk_: indeed you did.
2015-09-24T19:33:49Z stassats: i even get a corruption
2015-09-24T19:34:27Z dougk_: Xof: to your question, why on earth would we assume that 'def-to-lisp' cannot even correctly compile "natively" without adding cruft into the cc invocation if it's only to get values of constants out ?
2015-09-24T19:35:06Z stassats: a corruption at 0xaa, do the caches call functions from arrays or something?
2015-09-24T19:35:11Z dougk_: Xof: but indeed we assume that it can not and so we stuff in 'version-min' and then it's like you need a way to propagate the correctly computed value from Config.thing into a contrib. Why?
2015-09-24T19:35:16Z stassats: can they be uninitialized at that point?
2015-09-24T19:35:35Z stassats: or not functions, just some objects from arrays
2015-09-24T19:35:36Z dougk_: caches should all be usable right away assuming the underlying function that they compute otherwise works.
2015-09-24T19:35:51Z dougk_: there were many issues with caches being unusable early and fixed them all, at least at the level of the caching.
2015-09-24T19:36:07Z stassats: changing to %map didn't help
2015-09-24T19:36:18Z stassats: PC of the crash is in values-specifier-type-r
2015-09-24T19:36:19Z dougk_: dang. shoulda worked.
2015-09-24T19:36:51Z stassats: the backtrace is hosed (isn't that annoying)
2015-09-24T19:36:59Z stassats: i can hand-reconstruct the backtrace
2015-09-24T19:37:10Z dougk_: can you insert into the specifier-type function: (write-line "Got here with" ) (write type-specifier) or is it too much to assume that the cold stderr stream works ?
2015-09-24T19:37:37Z stassats: i'm printing the list just before the call to map
2015-09-24T19:37:39Z stassats: it's (32)
2015-09-24T19:37:44Z stassats: with PRINT
2015-09-24T19:38:08Z dougk_: char-code of space. hm. it sounds like the call to %MAP isn't getting transformed, and simple-string isn't one of the recognized cases.
2015-09-24T19:38:10Z dougk_: that's gotta be it.
2015-09-24T19:38:25Z stassats: i'll strip ! from unicode-properties-cold-init on x86-64 and disassemble it
2015-09-24T19:48:02Z stassats: x86-64 translates into map-into
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2015-09-24T20:03:08Z stassats: i think i did the transformation into map-into as well, now, why doesn't it work
2015-09-24T20:06:56Z stassats: looking at the trace file, it looks like it uses map-into too
2015-09-24T20:07:05Z stassats: so it must be something else, need to make a backtrace, by hand, sigh
2015-09-24T20:07:36Z stassats: or, break on values-specifier-type-r, call ldb_minitor
2015-09-24T20:09:37Z stassats: that only shows cold-init, doing it by hand then
2015-09-24T20:12:47Z stassats: so, that actually comes from vector-map-into/simple-character-string
2015-09-24T20:12:55Z stassats: which calls %map, huh
2015-09-24T20:15:46Z dougk_: I can try to get the type system ready for use sooner, which would allow the call to values-specifier-type-r. But fundamentally it should either be broken for all backends or not broken for all backends. It's been this way ever since the major unicode rewrite went in.
2015-09-24T20:16:16Z stassats: i can skip unicode-properties-cold-init for now
2015-09-24T20:16:19Z stassats: if i don't figure it out
2015-09-24T20:17:37Z stassats: huh what, sb-impl::vector-map-into/simple-character-string on x86-64 calls %map too, that ought to be expensive
2015-09-24T20:21:01Z stassats: what's the point of those map-into things if they call %map anyhow?
2015-09-24T20:21:18Z stassats: unless they are no sequences
2015-09-24T20:22:02Z stassats: as to arm64, i think i just have broken apply
2015-09-24T20:22:57Z stassats: vector-map-into functions could at least call %map-for-effect-arity-1 or %map-for-effect instead
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2015-09-24T20:32:06Z stassats: didn't return NULL from listify-rest-args when the count is 0
2015-09-24T20:38:56Z stassats: and now back to a %defknown tlf calling specifier-type and type= eventually saying that something is not a CTYPE
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2015-09-24T20:59:50Z stassats: dougk_: looking at defun-cached produced functions, they have full-calls to %ldb
2015-09-24T20:59:55Z stassats: dougk_: that's not going to be fast
2015-09-24T21:00:39Z stassats: scratch that
2015-09-24T21:00:45Z stassats: i was inside sb-xc
2015-09-24T21:00:59Z stassats: uncross-byte screws them there
2015-09-24T21:01:30Z stassats: but, would be nice for sb-xc to have sensible ldb performance
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2015-09-24T21:37:34Z stassats: the backtrace says csubtypep calls type=
2015-09-24T21:37:39Z stassats: i can't figure how that can happen
2015-09-24T21:47:12Z Bicyclidine: wouldn't it for array types?
2015-09-24T21:49:45Z dougk_: all sorts of ways I would think. csubtypep dispatches to any of the simple-subtypep or complex-subtypep-arg{1,2} pseudo-methods. a bunch of those call type-intersection, which has a short-circuit case when the inputs are type=
2015-09-24T21:50:19Z stassats: tail calls do not help
2015-09-24T21:50:23Z dougk_: toss any remaining bit of sanity out the window when trying to figure out what invoke-type-method calls.
2015-09-24T21:50:27Z stassats: or the backtraces in ldb is bloody useless
2015-09-24T21:51:25Z dougk_: every time I have a tried putting a FORMAT call into the dispatch to say what it's doing, I either end up with infinite recursion because something in format needs to test types, or I end up with 1 million lines of output for a single type= call, or I end up with nothing because it was in cache.
2015-09-24T21:53:15Z dougk_: and no offense to Xof, but the comments that he and WHN wrote saying "CLOS would make this easier" can not possibly be true
2015-09-24T21:54:22Z stassats: i think i know, clos will make it slower
2015-09-24T21:54:24Z stassats: g
2015-09-24T21:55:47Z stassats: "one thing"
2015-09-24T21:55:49Z stassats: damn
2015-09-24T21:55:56Z stassats: that's about how careful i'm writing ARM64 vops
2015-09-24T22:04:46Z stassats: just stumbled on "We miss CLOS!"
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2015-09-24T22:06:47Z stassats: finally found my type=
2015-09-24T22:07:06Z stassats: bloody tco, i should have just compiled with it disabled
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2015-09-24T22:51:24Z stassats: late-type is such spaghetti
2015-09-24T22:51:40Z stassats: i'm bouncing from function to function
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2015-09-24T23:03:04Z stassats: with-world-lock somehow corrupts the result
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2015-09-25T00:13:08Z stassats: skipping over with-world-lock, fixed up a bunch of other stuff, now into processing filesys.lisp
2015-09-25T00:13:38Z stassats: which is about 80%
2015-09-25T00:13:44Z stassats: good for today
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2015-09-25T00:17:43Z stassats: oh wait
2015-09-25T00:17:54Z stassats: i'm actually in !pathname-cold-init
2015-09-25T00:18:04Z stassats: so, all TLF processed, save for with-world-lock
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2015-09-25T00:21:35Z stassats: so, slime by the end of the week?
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2015-09-25T09:49:13Z |3b|: does sbcl support foreign callbacks from arbitrary threads in default threaded configuration on all platforms with threads now?
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2015-09-25T11:18:48Z stassats: |3b|: yes
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2015-09-25T13:31:10Z stassats: ok, alien problems
2015-09-25T13:31:25Z stassats: posix-getcwd/ returns the home directory correctly and then it goes bonkers
2015-09-25T13:32:58Z stassats: i didn't expect alien to work at all
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2015-09-25T13:50:20Z stassats: read-from-c-string is getting confused somehow
2015-09-25T13:50:34Z stassats: but only for a part of the string, weird
2015-09-25T13:59:55Z stassats: read-from-c-string actually gets it right, it gets corrupted somewhere later
2015-09-25T14:21:21Z attila_lendvai: it must be "fun" to debug all these errors...
2015-09-25T14:21:56Z Shinmera: Some people like figuring out bugs.
2015-09-25T14:23:04Z stassats: i would prefer there not to be any bugs
2015-09-25T14:28:20Z Xof: one nice thing about debugging a port is that there is a known-good state
2015-09-25T14:28:32Z Xof: so differential testing is easy and helpful
2015-09-25T14:28:43Z Xof: conceptually, anyway.  You have to be comfortable with gdb and eyeballing disassembly
2015-09-25T14:29:20Z stassats: as much as it's possible to be comfortable with gdb, i'm constantly left wanting
2015-09-25T14:31:01Z stassats: ppc64 will be so much easier
2015-09-25T14:33:04Z stassats: hm, was it CONCATENATE being broken all along? surprisingly, alien vops are working without much modification and without any testing
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2015-09-25T14:39:59Z stassats: ub32-bash-copy may be broken
2015-09-25T14:55:54Z stassats: and i also have corrupted heap again
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2015-09-25T15:13:23Z flavioc: Hi. I'm trying to understand what's the function returned by load_core_file
2015-09-25T15:13:39Z stassats: the initial function
2015-09-25T15:13:58Z flavioc: I'm trying to port SBCL and the initial function segfaults
2015-09-25T15:14:13Z stassats: that happens when you port things
2015-09-25T15:14:17Z flavioc: yes
2015-09-25T15:14:35Z stassats: the action of porting is to make it not segfault
2015-09-25T15:14:40Z flavioc: where is that initial function implemented?
2015-09-25T15:14:55Z stassats: what are you porting it to?
2015-09-25T15:14:59Z flavioc: hurd
2015-09-25T15:15:07Z stassats: oh my
2015-09-25T15:17:50Z Xof: the initial function is defined in src/code/cold-init; it's called !cold-init
2015-09-25T15:18:10Z Xof: also note that segfaulting is expected
2015-09-25T15:18:10Z stassats: that is if it's in cold-init
2015-09-25T15:18:29Z Xof: (the system implements a write barrier through write-protection)
2015-09-25T15:18:39Z stassats: get the PC, looking for it output/cold-sbcl.map
2015-09-25T15:20:30Z stassats: here is a tool i use to avoid eye grepping: https://gist.github.com/stassats/2b06d6142b1e110b0686
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2015-09-25T15:28:31Z flavioc: how is the core file built? I guess !cold-init is compiled using the cross-compiler?
2015-09-25T15:29:39Z stassats: from genesis
2015-09-25T15:30:16Z flavioc: src/compiler/generis/genesis.lisp?
2015-09-25T15:30:50Z stassats: that's the one
2015-09-25T15:36:21Z flavioc: thanks
2015-09-25T15:39:54Z stassats: for some reason CHAR things it's 64-bit
2015-09-25T15:39:55Z stassats: thinks
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2015-09-25T15:45:28Z stassats: impressive it survived up until now, probably because all strings were base
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2015-09-25T16:08:19Z stassats: i wonder if my choice of descripto regs r0-r10 was a bad idea, since r0-r7 are used for C argument passing
2015-09-25T16:09:35Z stassats: oh well, will have to change them
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2015-09-25T16:34:04Z stassats: of course that didn't go well
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2015-09-25T16:59:29Z flavioc: stassats: is it possible to speedup make-host-2.sh by just recompiling files that have changed?
2015-09-25T16:59:51Z stassats: yes, see slam.sh
2015-09-25T17:00:22Z stassats: and you should comment sh make-target-1.sh out
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2015-09-25T17:00:40Z stassats: and make-target-2, if you're not there yet
2015-09-25T17:01:29Z flavioc: perfect
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2015-09-25T17:51:45Z stassats: alloc_tramp will become more expensive, cause it'll have to save non-descriptor regs now
2015-09-25T17:54:43Z stassats: ok, now the freaky friday of nl-to-lisp-reg is successful
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2015-09-25T18:46:14Z stassats: for some reason call-out doesn't care for my allocated arg tns and allocates them anyway
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2015-09-25T19:44:02Z stassats: can't get the lifetimes in call-out right
2015-09-25T19:44:12Z stassats: will just specify :offset and deal with it later
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2015-09-25T20:57:57Z stassats: eh, the old UNWIND follows THROW
2015-09-25T20:58:09Z stassats: except that it's padded and i hit zeros
2015-09-25T20:58:17Z stassats: despite claiming that it's not padded
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2015-09-25T21:04:53Z stassats: looks like dougk_'s change in march changed the alignment bit
2015-09-25T21:05:29Z stassats: it didn't break arm32 because it probably coincided with alignment
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2015-09-25T21:28:53Z stassats: infinite-errors during set-pprint-dispatch
2015-09-25T21:28:56Z stassats: which means during compilation
2015-09-25T21:29:06Z stassats: which means it's impossible to debug
2015-09-25T21:44:10Z dougk_: the set-pprint-dispatch calls in make-target can be removed, and you can rely on print-level to cut off printing of things like LAYOUT which are self-referential
2015-09-25T21:44:46Z stassats: infinite-error-protect called print-backtrace, at which point it croaked
2015-09-25T21:44:50Z stassats: i removed that part
2015-09-25T21:45:39Z stassats: now the compiler complains about (sb-int:named-lambda "pprint-array-p" (object) (typep object (quote (and array (not (or string bit-vector))))))
2015-09-25T21:45:51Z stassats: constant conflicts with its assert type? which constant?
2015-09-25T21:47:19Z stassats: constant ARRAY conflicts with (OR CONS SYMBOL INSTANCE)
2015-09-25T21:51:45Z stassats: which is clearly bogus, so something is broken
2015-09-25T21:56:32Z stassats: ignoring pprint dispatch, "back from first gc"
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2015-09-25T22:12:04Z stassats: i have a cold REPL now, which in reality is REL
2015-09-25T22:15:28Z Xof: congratulations
2015-09-25T22:17:47Z stassats: no idea why it can't print, just before that in cold-init PRINT still works
2015-09-25T22:21:27Z stassats: with-rebound-io-syntax, ok
2015-09-25T22:22:38Z stassats: nope
2015-09-25T22:26:00Z stassats: it was flush-standard-output-stream
2015-09-25T22:26:10Z stassats: now i have a rePl
2015-09-25T22:26:17Z stassats: after a few compromises
2015-09-25T22:46:28Z stassats: now only set-pprint-dispatch is stopping me from getting to the REPL
2015-09-25T22:46:40Z stassats: and the REPL should make it easier figuring it out
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2015-09-26T00:02:00Z stassats: might as well try make-target-2
2015-09-26T00:02:42Z stassats: that was a quick affair
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2015-09-26T16:10:26Z stassats: hm, for some reason --lose-on-corruption doesn't lose
2015-09-26T16:14:47Z stassats: --disable-debugger found its way before it, sigh
2015-09-26T16:20:20Z stassats: the debugger in ldb is so easy to confuse, i probably should work some on that
2015-09-26T16:21:08Z stassats: the backtracer
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2015-09-26T16:57:39Z stassats: sprinkled some fake_foreign_function_calls around lisp_memory_fault_error, now i get backtraces
2015-09-26T16:57:48Z stassats: should have dine that a long time ago
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2015-09-26T18:00:17Z stassats: for the ppc64 port, i think the backend can remain the same
2015-09-26T18:00:34Z stassats: it just needs to respect n-word-bytes and n-fixnum-tag-bits
2015-09-26T18:24:29Z nyef: ... You _are_ leaving the MIPS64 port for me, right? (-:
2015-09-26T18:24:47Z stassats: i don't have such a machine anyway
2015-09-26T18:24:50Z nyef: ... And possibly the HPPA-64 port, if such hardware exists?
2015-09-26T18:25:09Z nyef: (I think it does, and if it does then I probably have some.)
2015-09-26T18:25:22Z stassats: so, i now have a cold-repl with backtraces
2015-09-26T18:25:38Z stassats: compilation of pprint-dispatches fails somewhere
2015-09-26T18:25:55Z stassats: and exiting the debugger exits the whole thing
2015-09-26T18:27:47Z p_l: nyef: HP PA 2.0 is 64bits, yes
2015-09-26T18:27:58Z p_l: most HPPA gear easily available in Poland is 64bit
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2015-09-26T18:32:33Z joshe: it's not hard to find 64-bit hppa gear on ebay
2015-09-26T18:36:55Z nyef: Okay, so as long as my HPPA box still works, it's 64-bit. Good to know.
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2015-09-26T22:40:06Z stassats: so, anyone up for taking sbcl-arm64 for a spin?
2015-09-26T22:43:23Z Ober: stassats: sure. got a branch?
2015-09-26T22:43:57Z stassats: https://github.com/stassats/sbcl/tree/arm64
2015-09-26T22:44:13Z stassats: it may have trouble building as i've only been cross-compiling
2015-09-26T22:44:58Z stassats: and it'll only take you as far as make-target-2.sh, and that's when commenting out some cold-pprint-dispatch
2015-09-26T22:45:13Z stassats: so, maybe not a good idea if you don't know what those thing mean
2015-09-26T22:49:24Z stassats: ok, now that i think about it more, it's not really in a good shape for building from that branch
2015-09-26T22:49:48Z stassats: once i have set-pprint-dispatch working, i'll make sure it builds
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2015-09-26T23:34:50Z stassats: hm, for some reason (let ((x 10)) (lambda () x)) returns some garbage
2015-09-26T23:34:57Z stassats: instead of the function
2015-09-26T23:35:10Z stassats: (let () (lambda () 10)) works fine
2015-09-26T23:36:14Z stassats: the garbage is already present in the constant table
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2015-09-26T23:40:47Z stassats: i guess that just a symptom of the compiler being broken by something
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2015-09-26T23:45:32Z flavioc: hi stassats, I made some more progress
2015-09-26T23:47:19Z flavioc: during make-host-2.sh, make-readtable does not return
2015-09-26T23:47:42Z flavioc: looks like it enters into an infinite loop, for some reason
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2015-09-27T00:06:31Z nyef: ... Isn't cold-pprint-dispatch about when the first triggered GC occurs?
2015-09-27T00:06:55Z stassats: it's when the first compiler runs
2015-09-27T00:07:11Z nyef: ... Not both?
2015-09-27T00:07:22Z stassats: nope
2015-09-27T00:07:51Z stassats: and set-pprint-dispatch functions get some bogus type conflict
2015-09-27T00:07:55Z stassats: no idea how to debug that yet
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2015-09-27T00:10:26Z stassats: (type-of #'list) returns RANDOM-CLASS, which is clearly wrong, will focus on that
2015-09-27T00:10:43Z stassats: will try fixing odd stuff in the hopes of set-pprint-dispatch getting fixed too
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2015-09-27T00:37:22Z stassats: who what, fixing (type-of #'list) fixed set-pprint-dispatch, lucky break
2015-09-27T00:37:29Z stassats: s/who/whoa/
2015-09-27T00:38:21Z stassats: ok, i can now cold boot vanilla cold-init
2015-09-27T01:13:28Z stassats: but compilation still derails somewhere anyway
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2015-09-27T16:54:52Z stassats: no idea what makes the compiler compile wrong things, so maybe "slime by the end of the week" won't be realized
2015-09-27T16:55:10Z stassats: at least i have broken bignum multiplication to work on
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2015-09-28T02:29:55Z stassats: yet another lifetime problem
2015-09-28T02:30:04Z stassats: but that doesn't fix compilation
2015-09-28T02:48:04Z stassats: can't lifetime specification be simpler? "these can go together, those can't"
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2015-09-28T08:22:01Z yvm: Is it a way to convert SAP to simple vector with sb-alien?
2015-09-28T08:25:44Z attila_lendvai: yvm: I think there is, but I don't remember offhand
2015-09-28T08:27:29Z scymtym: yvm: maybe SB-VM::COPY-UB{1,2,4,8,…}-FROM-SYSTEM-AREA?
2015-09-28T08:28:17Z attila_lendvai: yvm: do you want to actually copy, or just want a lisp simple-vector object that can access the underlying data?
2015-09-28T08:29:18Z yvm: I need to access data allocated by foreign function.
2015-09-28T08:30:02Z yvm: Actually it's a poiner to mapped memory.
2015-09-28T08:32:32Z scymtym: yvm: maybe SB-SYS:SAP-REF-{8,16,…} then?
2015-09-28T08:35:55Z yvm: scymtym, sap-ref provides access to alien memory, but I want to access with native CL's vector.
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2015-09-28T08:52:09Z scymtym: yvm: i see. not sure whether this is possible with a simple vector since the array header and array data seem to be stored in adjacent memory for simple vectors and the foreign code will probably not leave room for an array header at the beginning of the memory range
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2015-09-28T08:56:17Z yvm: Ok, got it. Thanks.
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2015-09-28T11:47:09Z Xof: does anyone know what's going on with the asdf/uiop:run-program windows complaint?
2015-09-28T11:47:22Z Xof: and is there anything else I should bear in mind before releasing?
2015-09-28T11:53:04Z scymtym: Xof: https://ci.cor-lab.org/job/sbcl-master/ and https://ci.cor-lab.org/job/sbcl-master-compare-outputs look good
2015-09-28T11:54:37Z scymtym: on a related note, immediately after the release would be a good time for running tools-for-build/pending-deprecations.lisp and deprecating things since that would leave the most time for detecting and fixing problems
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2015-09-28T12:19:24Z stassats: yvm: it is possible
2015-09-28T12:20:29Z stassats: see http://paste.lisp.org/display/142849#4
2015-09-28T12:20:38Z stassats: caution, extremely hacky
2015-09-28T12:26:04Z stassats: Xof: nothing's changed in that regard on windows, so it's an asdf problem
2015-09-28T12:44:04Z nyef sighs.
2015-09-28T12:44:23Z nyef: The more I look at the SB-POSIX termios interface, the more I'm convinced that it doesn't work, and never has.
2015-09-28T12:44:53Z stassats: was there some kind of a lifetime tool?
2015-09-28T12:45:09Z nyef: For visualizing VOP argument lifetimes?
2015-09-28T12:45:25Z stassats: dunno what it did, never used it
2015-09-28T12:45:40Z stassats: i just guess that there's a lifetime problem in one of the vops
2015-09-28T12:45:49Z stassats: but it doesn't crash, so, no idea which
2015-09-28T12:45:53Z nyef: http://lisphacker.com/temp/voplife.png
2015-09-28T12:46:03Z nyef: Look at all like what you want?
2015-09-28T12:46:26Z stassats: well, i can do that in my head, i was thinking something that can sense conflicts
2015-09-28T12:46:35Z nyef: Hrm.
2015-09-28T12:46:58Z nyef: I think I built something that might have been able to, but it didn't find the bug that I was looking for...
2015-09-28T12:47:17Z nyef: I don't remember if I kept it.
2015-09-28T12:47:21Z stassats: i only need to find what produces wrong results
2015-09-28T12:47:37Z stassats: i wasn't focused much on lifetimes when rewriting vops -- a mistake
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2015-09-28T12:50:25Z nyef: Okay, found my working notes... And they imply that I stuffed the hack into a git commit somewhere.
2015-09-28T12:51:07Z stassats: i wonder if i can just disable packing into the same locations and see if it works
2015-09-28T12:51:39Z stassats: that's actually a good idea to rule this out
2015-09-28T12:52:05Z nyef: http://repo.or.cz/sbcl/nyef.git/shortlog/refs/heads/assembler-hacks
2015-09-28T12:52:31Z nyef: The HEAD commit on that branch is where I left it.
2015-09-28T12:53:38Z nyef: The preceding four commits are the support work for it.
2015-09-28T12:54:37Z nyef: I forget what it was that I was trying to track down, but I will say that this thing didn't twig to it at all.
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2015-09-28T14:01:40Z yvm: Is it possible bind "native" CL symbol with alien SAP value to use it later with sap-ref-*?
2015-09-28T14:05:37Z pkhuong: no. you can use a hash table or an array to map between the two.
2015-09-28T14:06:04Z pkhuong: or with-pinned-object if you only need the SAP to be valid in a fixed dynamic scope
2015-09-28T14:07:07Z yvm: Thanks.
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2015-09-28T14:37:43Z stassats: disabling tn packing didn't work, naturally
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2015-09-28T16:29:44Z yvm: sb-posix has no o-cloexec flag?
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2015-09-28T16:43:32Z yvm: No, it hasn't.
2015-09-28T16:44:36Z yvm: Shouldn't it be added to constants.lisp?
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2015-09-28T17:51:41Z stassats: if i don't specify any lifetimes, only args and results can overlap?
2015-09-28T18:17:38Z stassats: and how do lifetimes interact with :more?
2015-09-28T18:19:52Z PuercoPop: scymtym: A while ago, when someone asked about inspecting the IR, you hinted at graph-component, where you just giving an example or do you have some code? If you have the code, care to share it?. I've seen some (apparently incomplete) code in the cl-dot repo in the sb-c-example.lisp.
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2015-09-28T18:36:11Z stassats: auditing all the vops along and across didn't help
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2015-09-28T20:21:42Z scymtym_: PuercoPop: the code depends on support for clusters which i added to cl-dot but haven't submitted to upstream yet (has been on my todo list for months). it is based on one or two similar visualizations and probably doesn't go very far beyond them besides using clusters for blocks. the current state is like this: http://www.techfak.uni-bielefeld.de/~jmoringe/graph.png. i can share the code but you would have to use my cl-dot branch
2015-09-28T20:22:52Z scymtym_ should probably get rid of the CTRAN clusters
2015-09-28T20:24:53Z stassats: eh, just as incomprehensible as the original
2015-09-28T20:38:14Z scymtym_: true, sadly
2015-09-28T20:38:42Z stassats: maybe something interactive would be better
2015-09-28T20:38:59Z stassats: i've been meaning to make such a thing for a long time
2015-09-28T20:39:47Z scymtym_: i can imagine that would help
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2015-09-28T20:54:14Z Xof: David Lichteblau made a CLIM IR1 inspector a million years ago
2015-09-28T20:54:24Z stassats: clim, though
2015-09-28T20:54:33Z Xof: http://www.lichteblau.com/blubba/irspect.png
2015-09-28T20:54:35Z Xof: I know
2015-09-28T20:54:46Z stassats: and i think i couldn't get it to work /compile
2015-09-28T20:54:46Z Xof: still pretty nifty
2015-09-28T20:58:34Z _8hzp: ... could probably be re-implemented easily and to great profit by someone who actually knows what they're doing ...
2015-09-28T20:58:48Z Xof: O Hai
2015-09-28T20:58:55Z stassats: if i knew ir, then i wouldn't need a visualizer
2015-09-28T20:59:21Z Xof: honey, knowledge of IR1, and some bread lets you make honey sandwiches
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2015-09-28T22:33:39Z PuercoPop: scymtym_: I agree that the visualization is very clarifying, but it still is a small improvement over using the slime inspector in that I can see the incomprehensible mess at once. I'm ok with using your repo of cl-dot if you would push the branch.
2015-09-28T22:34:51Z scymtym_: PuercoPop: i'm just doing some minimal cleanup, will push after that
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2015-09-28T22:46:29Z stassats: something seems to be wrong with the function header
2015-09-28T22:46:50Z stassats: when i compile a function which returns a closure, the closure has a broken %closure-fun
2015-09-28T22:47:00Z stassats: closures compiled on the host are ok
2015-09-28T22:50:20Z stassats: while %closure-values seems to be alright
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2015-09-28T23:05:53Z stassats: at least i'm still fixing bugs, even if they are not related to my main problem
2015-09-28T23:06:40Z stassats: hopefully one of them will
2015-09-28T23:07:02Z PuercoPop: scymtym_: k, thanks.
2015-09-28T23:11:20Z scymtym_: PuercoPop: https://github.com/scymtym/cl-dot/tree/wip-clusters and https://gist.github.com/scymtym/7de957988aff9a1edb34. but be warned: everything barely works and needs lots of cleanup
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2015-09-28T23:40:06Z nyef: stassats: Wait, I think I know that one, with the closure fun being wrong.
2015-09-28T23:40:57Z nyef: Hrm... Or not? Might be mixing it up with the fdefn version?
2015-09-28T23:41:32Z nyef: stassats: Where's your repository, again?
2015-09-28T23:42:09Z stassats: https://github.com/stassats/sbcl/tree/arm64
2015-09-28T23:44:17Z nyef: Oh. This is a separate backend directory, not trying to do things on top of the arm port?
2015-09-28T23:44:27Z stassats: not possible
2015-09-28T23:44:35Z stassats: impossible
2015-09-28T23:45:20Z stassats: you wouldn't know arm64 was related to arm if not for the name
2015-09-28T23:45:58Z nyef: Fair enough.
2015-09-28T23:46:26Z stassats: the spec defines a lot of aliases so the code looks mostly similar
2015-09-28T23:48:25Z stassats: that could be done with ppc, though
2015-09-28T23:49:10Z nyef: Could probably be done with MIPS as well.
2015-09-28T23:51:20Z stassats: it seems like ppc64 and mips64 ports would be done most efficiently in parallel
2015-09-28T23:51:37Z stassats: since similar things would have to be adjusted
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2015-09-28T23:59:08Z stassats: maybe something's wrong with code constants
2015-09-29T00:01:26Z stassats: nope, seems to work
2015-09-29T00:01:39Z stassats: then it must be make-closure
2015-09-29T00:04:32Z stassats: was using the wrong sbcl, seems like it's a constants problem again
2015-09-29T00:05:22Z stassats: but it only affects functions
2015-09-29T00:06:15Z stassats: not just any functions, closed over functions
2015-09-29T00:06:22Z nyef: ... not in SET-HEADER-DATA, right?
2015-09-29T00:06:45Z stassats: (type-of (sb!kernel:code-header-ref (sb!kernel:fun-code-header (lambda () (lambda ()))) sb!di::code-constants-offset))
2015-09-29T00:06:46Z stassats: ok
2015-09-29T00:06:55Z stassats: (type-of (sb!kernel:code-header-ref (sb!kernel:fun-code-header (lambda (x) (lambda () x))) sb!di::code-constants-offset)) => random-class
2015-09-29T00:07:33Z nyef: Umm...
2015-09-29T00:07:47Z nyef: That second one isn't even a closure, is it?
2015-09-29T00:08:06Z stassats: it is
2015-09-29T00:08:20Z nyef: I see a function that allocates a closure, but...
2015-09-29T00:08:37Z nyef: Oh. The closure function comes first?
2015-09-29T00:08:58Z stassats: you're looking at disassemble?
2015-09-29T00:09:16Z stassats: it's dumb, use sb-disassem:disassemble-code-component
2015-09-29T00:09:24Z nyef: No, I'm looking at what you have here on IRC.
2015-09-29T00:10:20Z stassats: so, there's a difference in how constants are set, let me inject some printing
2015-09-29T00:10:31Z nyef: Ah, it's a corrupt code component when it contains a closure-fun?
2015-09-29T00:10:43Z nyef: Even when the component is never run?
2015-09-29T00:11:07Z stassats: symbols and simple funs are ok, closed over functions, garbage
2015-09-29T00:14:53Z nyef: And they're fine if they come from the XC?
2015-09-29T00:15:15Z stassats: last time i checked
2015-09-29T00:15:16Z nyef: Are you testing in-core or file compilation, or both?
2015-09-29T00:15:23Z stassats: in-core
2015-09-29T00:16:43Z nyef: Might be worth checking the file compilation version?
2015-09-29T00:17:24Z stassats: i have trouble already in reference-core-fun
2015-09-29T00:17:51Z stassats: maybe, but it wouldn't help me much if it works or not
2015-09-29T00:18:42Z nyef: If it works, you know to cross-check the machinery in generic/target-core. Either way, you can try to verify if the FASL is sane or not.
2015-09-29T00:18:50Z stassats: fails after cf too
2015-09-29T00:19:28Z stassats: maybe gethash is broken
2015-09-29T00:19:44Z stassats: let's check what actually is interned into it
2015-09-29T00:21:47Z stassats: that can't survive cold-init
2015-09-29T00:22:00Z stassats: probably can avoid printing when checking *gc-inhibit*
2015-09-29T00:22:57Z nyef: I wonder if I have the energy to write up a bug description for how bad sb-posix termios is...
2015-09-29T00:27:06Z stassats: note-fun already gets garbage
2015-09-29T00:27:13Z stassats: but looks like i've the thread which to pull
2015-09-29T00:27:42Z stassats: found
2015-09-29T00:29:08Z stassats: is it compute-fun?
2015-09-29T00:30:53Z stassats: i thought i fixed that
2015-09-29T00:31:32Z nyef: It doesn't look obviously wrong, FWIW.
2015-09-29T00:32:02Z nyef: Of course, these things are often only be obvious in retrospect.
2015-09-29T00:32:11Z nyef edit fail.
2015-09-29T00:35:15Z stassats: but make-fun-entry gets something bogus
2015-09-29T00:36:01Z stassats: maybe compute-fun gets something bogus in the first place
2015-09-29T00:36:50Z hydan quit (Ping timeout: 244 seconds)
2015-09-29T00:38:13Z stassats: wait, is offset in bytes?
2015-09-29T00:38:34Z stassats: i'm treating it like it's in words
2015-09-29T00:41:32Z stassats: testing
2015-09-29T00:41:59Z stassats: i was fixing it two days ago and fixed it wrong
2015-09-29T00:42:16Z stassats: it worked probably because all offsets were 0, but it's not 0 for closures
2015-09-29T00:42:44Z stassats: if it doesn't work, i'll eat a puppy
2015-09-29T00:43:07Z stassats: puppy spared
2015-09-29T00:45:24Z stassats: make-target actually started compiled something, before succumbing
2015-09-29T00:45:27Z stassats: -2
2015-09-29T00:46:55Z stassats: ok, new goal: slime by the end of _this_ week
2015-09-29T00:47:27Z stassats: since i have to do some actually paying work too
2015-09-29T01:07:25Z scymtym_ quit (Ping timeout: 246 seconds)
2015-09-29T01:13:39Z kanru` quit (Ping timeout: 240 seconds)
2015-09-29T01:17:16Z Intensity joined #sbcl
2015-09-29T01:20:55Z stassats: i now have some really bogus reg_CODE
2015-09-29T01:24:43Z stassats: also, should reg_CODE be tagged or not?
2015-09-29T01:24:54Z nyef: Dear god YES, it should be tagged.
2015-09-29T01:26:13Z stassats: it is normally tagged, yes, just this line confused me https://github.com/stassats/sbcl/blob/arm64/src/runtime/interrupt.c#L1588
2015-09-29T01:26:56Z nyef: Hrm. That's neat.
2015-09-29T01:27:28Z nyef: That's arrange_return_to_c_function()?
2015-09-29T01:27:36Z stassats: yes
2015-09-29T01:27:52Z stassats: FSHOW((stderr, "/arranged return to Lisp function (0x%lx)\n", is a tad wrong
2015-09-29T01:28:56Z nyef: Now, why does that only happen for systems with tagged trampolines?
2015-09-29T01:29:10Z nyef: Why not for, say, MIPS or PPC?
2015-09-29T01:29:44Z stassats: is it even right?
2015-09-29T01:30:15Z stassats: function must be already tagged, but reg_CODE doesn't even want a function
2015-09-29T01:31:15Z nyef: Ah! Check the ARM and SPARC calling convention. I bet they're perfectly happy (and require) that reg_CODE be the incoming function pointer on entry.
2015-09-29T01:31:16Z stassats: is it some special return sequence for sparc?
2015-09-29T01:31:35Z stassats: not lexenv?
2015-09-29T01:31:41Z stassats: but what's with tagging?
2015-09-29T01:32:11Z nyef: funptr is only used on x86oids.
2015-09-29T01:32:25Z nyef: fun is an untagged pointer.
2015-09-29T01:32:43Z stassats: so lispobj is a lie?
2015-09-29T01:32:54Z stassats: well, it's a fixnum
2015-09-29T01:32:56Z nyef: Look at line 1418.
2015-09-29T01:33:43Z stassats: ok, fun vs function
2015-09-29T01:33:49Z stassats: what a wonderful choice of names
2015-09-29T01:33:54Z nyef: ... This function is nuts.
2015-09-29T01:34:05Z nyef: So, you build fake...
2015-09-29T01:34:24Z nyef: ... I'm not seeing anything with LEXENV, so it must be a SIMPLE-FUN, not a closure or funcallable-instance...
2015-09-29T01:35:09Z stassats: it's only for errors
2015-09-29T01:35:28Z stassats: so, how does gengc update reg_CODE, in the context?
2015-09-29T01:35:41Z nyef: During a GC?
2015-09-29T01:35:45Z stassats: ye
2015-09-29T01:35:49Z nyef: It's a boxed register.
2015-09-29T01:36:05Z stassats: but all descriptor registers are saved on the stack
2015-09-29T01:36:15Z nyef: Hmm?
2015-09-29T01:36:33Z stassats: in alloc_tramp, it saves descriptor registers
2015-09-29T01:36:53Z stassats: well, i wrote alloc_tramp, so i can't rely on it being a second source of understanding how it works
2015-09-29T01:36:54Z stassats: sigh
2015-09-29T01:38:05Z nyef: So, for the _interrupt case_, it's treated as a descriptor register.
2015-09-29T01:38:41Z nyef: For the allocation stuff, well, it's horridly platform-dependent, because it seems like no three platforms (and possibly no two platforms) handle allocation overflow the same way.
2015-09-29T01:38:45Z stassats: ok
2015-09-29T01:38:50Z stassats: my assumption is totally wrong
2015-09-29T01:39:16Z stassats: the gc is launched in do_pending_interrupted
2015-09-29T01:39:50Z stassats: i only need to save things thrashed by the C ABI
2015-09-29T01:40:49Z stassats: and i assume it takes registers from the context
2015-09-29T01:42:14Z nyef: do_pending_interrupt is invoked from the pending_interrupt trap, right?
2015-09-29T01:42:24Z nyef: Then it should pull stuff from the context, yes.
2015-09-29T01:42:37Z stassats: it's invoked after exiting PA
2015-09-29T01:43:08Z nyef: Yeah, that's as it should be.
2015-09-29T01:43:10Z nyef: Hrm...
2015-09-29T01:43:23Z nyef: ... why do I get the feeling that I'm staring at a bug, and not able to see it?
2015-09-29T01:44:16Z stassats: ok, so, my register spilling is harmless but not necessary
2015-09-29T01:45:16Z stassats: so, the gc is triggered only after alloc() is exited?
2015-09-29T01:45:21Z nyef: Oh, for the... I _am_ staring at a bug. For all non-x86oid platforms other than SPARC, ARM, and ARM64.
2015-09-29T01:45:51Z stassats: SPARM34
2015-09-29T01:45:56Z nyef: I think there's a special case for when alloc() is called rather than doing an inline allocation.
2015-09-29T01:46:05Z nyef: I really don't remember that part of the system.
2015-09-29T01:46:49Z stassats: there is pa_alloc
2015-09-29T01:47:32Z stassats: and it was broken
2015-09-29T01:47:41Z stassats: i solved by switching to DX allocation from the runtime
2015-09-29T01:50:29Z stassats: so when gc is a bout to hit, alloc() returns the region which will eventually get cleared, but sets pai
2015-09-29T01:50:56Z nyef: Okay, so why is this bit of magic only done on SPARC, ARM, and ARM64? I know that it's right for ARM and ARM64, even if they never reference the value... But given the overall maintenance status of non-x86oid backends, why is it here for SPARC?
2015-09-29T01:52:22Z stassats: don't rely on ARM64
2015-09-29T01:52:28Z stassats: that was just search and replace
2015-09-29T01:53:03Z nyef: ... Because SPARC uses INST COMPUTE-CODE-FROM-FN, passing CODE-TN as the FN...
2015-09-29T01:54:05Z nyef: ... And PPC uses COMPUTE-CODE-FROM-LIP (!), drawn from ALPHA...
2015-09-29T01:54:50Z nyef: No, wait, PPC is the precedent-setter here, isn't it? Or was it RT that set the precedent, and MIPS the first port?
2015-09-29T01:55:03Z stassats: cargo cult, cargo cult everywhere
2015-09-29T01:55:04Z nyef: MIPS, also from LIP.
2015-09-29T01:55:21Z nyef: Yeah, there's a reason why I didn't copy a backend wholesale when I set up ARM in the first place.
2015-09-29T01:56:31Z nyef: Okay, I found a bug that exists on ALPHA, HPPA, MIPS, and PPC.
2015-09-29T01:56:37Z stassats: the arm64 port is like my worst programming experience
2015-09-29T01:56:54Z stassats: nyef: i think i saw problems with heap exhaustion on ppc
2015-09-29T01:57:07Z stassats: which uses return_to
2015-09-29T01:58:14Z nyef: In this case, it's more that a badly-timed interrupt can allow the GC to move INTERNAL-ERROR out from under the CPU, for a window of a few instructions at the start of the function.
2015-09-29T01:59:52Z stassats: trying to trigger a HE error on ppc
2015-09-29T02:00:13Z stassats: not much like for some reason
2015-09-29T02:01:21Z stassats: (loop collect (make-array 100000000)) only uses 30MB
2015-09-29T02:01:44Z stassats: ok, finally
2015-09-29T02:01:59Z stassats: ok, the error does reach lisp
2015-09-29T02:03:29Z stassats: maybe RES is broken on PPC linux
2015-09-29T02:05:52Z nyef: Oh, fun and games. The "obvious" fix for the issue I noticed works on everything but Alpha.
2015-09-29T02:06:12Z nyef: ... And for no bloody good reason.
2015-09-29T02:13:55Z stassats: the operation of scavenge in scavenge_interrupt_context is not quite clear to me
2015-09-29T02:14:18Z stassats: why does it scavenge twice?
2015-09-29T02:22:30Z stassats: so, my CODE contains 1 in the header, is that the forwarding pointer?
2015-09-29T02:26:18Z stassats: the next word is 0x0000000055ba90fb, which is actually a simple-fun
2015-09-29T02:29:10Z stassats: so, the code object is transplanted, but reg_CODE is not updated
2015-09-29T02:29:12Z stassats: how come?
2015-09-29T02:31:20Z stassats: code is fetched from LRA data, maybe that's not updated
2015-09-29T02:35:17Z nyef: What the... I have no idea why it scavenges twice.
2015-09-29T02:36:43Z nyef: Why is there an a.out file in src/runtime?
2015-09-29T02:37:04Z stassats: it's chilling
2015-09-29T02:38:05Z nyef: Wait, where's your reg_LRA?
2015-09-29T02:38:05Z stassats: it's even empty
2015-09-29T02:38:22Z stassats: reg_LR?
2015-09-29T02:39:11Z nyef: Oh, right, there is no reg_LRA on ARM, because of register pressure, so it gets slammed into the stack frame directly.
2015-09-29T02:40:27Z nyef: No, not reg_LR, that's a "link register". reg_LRA, the "lisp return address".
2015-09-29T02:41:06Z stassats: lr doubles as an interior pointer
2015-09-29T02:41:12Z nyef: Yes. Yes, it does.
2015-09-29T02:41:25Z nyef: LR, like PC, must partake of the interior-pointer nature.
2015-09-29T02:42:25Z nyef: Next, it's not likely that reg_CODE is getting messed up directly. It's more likely that it's being loaded from something that's messed up.
2015-09-29T02:42:52Z stassats: so, after each call reg_CODE is being recomputed?
2015-09-29T02:43:21Z stassats: why not save it on the stack or something?
2015-09-29T02:44:10Z nyef: Because we have to save the address of the LRA, and for everything that we save on the stack, we need to cover it with an arg-passing register... And we can easily recompute CODE from an LRA.
2015-09-29T02:44:19Z nyef: So, your GC is broken for fdefns.
2015-09-29T02:44:37Z nyef: ... I think.
2015-09-29T02:45:06Z nyef: Yeah, it's broken
2015-09-29T02:45:25Z nyef: Remove ARM64 from the two conditions in gc-common.c, because you're not using tagged trampolines.
2015-09-29T02:47:47Z stassats: that did it
2015-09-29T02:47:52Z stassats: cool cool cool
2015-09-29T02:48:20Z stassats: now it crashes at brad.lisp
2015-09-29T02:49:22Z nyef: Your funcallable_instance_tramp is tagged, for some reason.
2015-09-29T02:49:24Z stassats: sigbus received, and no interrupt context, time to add some fake_foreign_function_calls
2015-09-29T02:49:32Z stassats: nyef: haven't touched it yet
2015-09-29T02:49:39Z nyef: Well, touch it now.
2015-09-29T02:49:52Z stassats: yeah, probably a good time to do it
2015-09-29T02:49:59Z stassats: i also don't have complex floats
2015-09-29T02:50:40Z stassats: not that it will stop make-target
2015-09-29T02:50:47Z stassats: just from the category of things that do not work
2015-09-29T02:51:10Z nyef: Well, you're getting pretty far along the target-2 path, at least.
2015-09-29T02:51:56Z nyef: ... I have no idea if undefined_alien_function is also supposed to be tagged or not...
2015-09-29T02:52:07Z nyef: Probably is, really...
2015-09-29T02:52:43Z stassats: can ignore it for some time
2015-09-29T02:53:00Z nyef: Sure, or you can fix it now, since you're already having to fix up a trampoline.
2015-09-29T02:53:33Z stassats: but i don't want to test it
2015-09-29T02:53:37Z stassats: right now
2015-09-29T02:54:38Z stassats: and i wouldn't have anything to do when i'm stuck
2015-09-29T02:55:19Z stassats: still failing in braid.lisp
2015-09-29T02:55:24Z nyef: Hrm...
2015-09-29T02:55:28Z stassats: now for that fake_foreign_function_calls
2015-09-29T02:57:26Z stassats: reg-code is now a fixnum
2015-09-29T02:57:27Z stassats: whoa
2015-09-29T02:57:56Z nyef: Eh?
2015-09-29T02:58:17Z stassats: "look ma, no lowtag"
2015-09-29T03:01:37Z stassats: pc is pointing to alloc_tramp, but it's not aligned
2015-09-29T03:01:51Z stassats: did i not sync all the files
2015-09-29T03:02:51Z stassats: ok, still not aligned
2015-09-29T03:03:03Z stassats: and it's not in the middle or anything
2015-09-29T03:03:19Z stassats: rather
2015-09-29T03:03:28Z stassats: it's not around entry/exit points
2015-09-29T03:04:39Z stassats: 25 away from the entry point
2015-09-29T03:05:21Z Quadrescence joined #sbcl
2015-09-29T03:06:22Z nyef: Okay, what is alloc_tramp here?
2015-09-29T03:07:19Z nyef: You're doing WHAT in alloc_tramp?!?
2015-09-29T03:07:27Z stassats: don't mind that
2015-09-29T03:07:40Z stassats: it saves some extra-nous registers
2015-09-29T03:07:52Z nyef: Don't mind what? The bit where you desynch reg_LR from reg_CODE, and then allow the GC to run?
2015-09-29T03:08:12Z stassats: it's under PA, isn't it?
2015-09-29T03:08:12Z nyef: No wonder you're ending up in hyperspace: You're ending up in OLDSPACE.
2015-09-29T03:09:29Z nyef: Umm... PA is handled via a different mechanism when FFCA is set.
2015-09-29T03:10:00Z stassats: well, it's working in ARM32
2015-09-29T03:10:12Z nyef: Now you're scaring me.
2015-09-29T03:12:36Z stassats: i had a problem with assembly routines calling alloc_tramp on arm32
2015-09-29T03:13:01Z stassats: since then both PC and LR point to something strange, i solved that by keeping LR pointing into the original function
2015-09-29T03:13:19Z stassats: but that problem is only during do_pending_interrupt, not alloc_tramp itself
2015-09-29T03:13:20Z nyef: Okay, I stand corrected. PA on ARMoids is handled via the same mechanism on both sides.
2015-09-29T03:16:30Z stassats: ldb backtraces shows that it's in find-slot-definition before doing something strange with alloc_tramp
2015-09-29T03:16:38Z stassats: but find-slot-definition doesn't even cons
2015-09-29T03:18:16Z stassats: now, how do i trap the thing that jumps to an unlingned address
2015-09-29T03:18:18Z stassats: huh, gdb?
2015-09-29T03:20:40Z nyef points out that there's a _known_ cause for occasionally jumping to an unaligned address.
2015-09-29T03:20:49Z nyef: What unaligned address, actually?
2015-09-29T03:21:35Z stassats: ends in dd
2015-09-29T03:22:33Z nyef: In what space?
2015-09-29T03:22:45Z stassats: sbcl.exe
2015-09-29T03:22:59Z nyef: That looks like a function lowtag, doesn't it?
2015-09-29T03:23:14Z stassats: not really
2015-09-29T03:23:35Z nyef: Ah, right, 64-bit.
2015-09-29T03:23:58Z stassats: the LR at that point is actualing pointing to funcallable_instance_tramp
2015-09-29T03:24:02Z stassats: which is mighty weird
2015-09-29T03:24:50Z nyef: Ah.
2015-09-29T03:25:27Z stassats: funcallable_instance_tramp doesn't even use bLr
2015-09-29T03:25:30Z nyef: Is the LR your fault address, or is it a decoy?
2015-09-29T03:25:53Z stassats: it's a sigbus, PC is being misaligned
2015-09-29T03:26:14Z stassats: trapping on funcallable_instance_tramp in gdb and looking
2015-09-29T03:26:36Z nyef: LR is your only declared interior-reg.
2015-09-29T03:27:18Z stassats: bloody gdb, doesn't like my BRK
2015-09-29T03:27:51Z stassats: probably uses them for breakpoints
2015-09-29T03:29:07Z stassats: CODE: 0x004229b0  LR: 0x004229dd
2015-09-29T03:29:18Z stassats: there was no gc in sight
2015-09-29T03:29:37Z nyef: What's PC at this point?
2015-09-29T03:29:53Z stassats: 0x004229dd
2015-09-29T03:30:03Z nyef: Hrm.
2015-09-29T03:30:16Z nyef: I don't suppose you know the previous PC?
2015-09-29T03:30:25Z stassats: i can try
2015-09-29T03:30:42Z nyef: Wait, did you say that 4229dd is funcallable_instance_tramp?
2015-09-29T03:30:53Z stassats: 0x004229b0 is
2015-09-29T03:31:07Z stassats: i mixed up LR and CODE in gdb
2015-09-29T03:31:11Z nyef: Hrm.
2015-09-29T03:31:33Z nyef: Damn, maybe it needs to be tagged after all?
2015-09-29T03:31:38Z stassats: funcallable_instance_tramp now looks loke closure_tramp
2015-09-29T03:31:39Z nyef: Checking on... PPC.
2015-09-29T03:32:04Z nyef: Yes, funcallable_instance_tramp needs to be tagged, sorry.
2015-09-29T03:32:19Z stassats: ha-ha
2015-09-29T03:32:37Z stassats: for once laziness wins
2015-09-29T03:32:54Z nyef: "Hard work pays off over time, but laziness pays off immediately"?
2015-09-29T03:34:01Z stassats: let's see if it makes any difference
2015-09-29T03:35:37Z stassats: now, code 42297d,  LR 4229aa PC 4229aa
2015-09-29T03:36:00Z stassats: fit is a t 42297d
2015-09-29T03:37:19Z nyef: Ah.
2015-09-29T03:37:27Z nyef: I see it.
2015-09-29T03:37:38Z nyef: That +1 for the tag on funcallable_instance_tramp?
2015-09-29T03:37:57Z nyef: Try making it a +3.
2015-09-29T03:38:20Z stassats: 64-bit
2015-09-29T03:38:22Z nyef: It's actually supposed to be (- fun-pointer-lowtag n-word-bytes).
2015-09-29T03:38:41Z nyef: 64-bit.
2015-09-29T03:38:45Z stassats: i can do _that_, can't i?
2015-09-29T03:39:04Z nyef: Hey, there's a point. Use the actual calculation there?
2015-09-29T03:39:54Z stassats: in case we port to arm-128
2015-09-29T03:40:23Z stassats: GC invariant lost
2015-09-29T03:41:03Z stassats: no PA
2015-09-29T03:41:45Z loke: stassats: I was wondering why you were talking to me above...
2015-09-29T03:41:57Z loke: Turns out you typoe'd.
2015-09-29T03:42:04Z stassats: o did
2015-09-29T03:42:30Z stassats: i wonder if funcallable_instance_tramp still somehow gets into alloc_tramp?
2015-09-29T03:42:45Z stassats: ah ah, i did the wrong code header
2015-09-29T03:45:18Z stassats: now it takes suspiciously too much time in braid.lisp
2015-09-29T03:45:41Z nyef: Probably an infinite loop somewhere.
2015-09-29T03:46:01Z stassats: guess where?
2015-09-29T03:46:24Z nyef: funcallable_instance_tramp, of course.
2015-09-29T03:46:39Z stassats: for some reason it gets itself from lexenv
2015-09-29T03:46:47Z stassats: evidently
2015-09-29T03:48:49Z stassats: what is even the point of that tramp?
2015-09-29T03:50:41Z stassats: inserted a halt trap there, let's see
2015-09-29T03:51:14Z nyef: IIRC, there's some sort of double-bounce involved.
2015-09-29T03:51:24Z nyef: Like the closure_tramp ends up calling the funcallable_instance_tramp.
2015-09-29T03:51:45Z nyef: Or if you're doing an anonymous call, you end up calling the funcallable_instance_tramp directly? Something like that.
2015-09-29T03:52:07Z stassats: argh, another .word vs .dword
2015-09-29T03:54:36Z stassats: umpteenth time is the charm
2015-09-29T03:54:48Z stassats: end of make-target-2.lisp
2015-09-29T03:55:08Z stassats: slad done
2015-09-29T03:55:31Z stassats: cleared the tower
2015-09-29T03:55:32Z stassats: wait what?
2015-09-29T03:56:24Z stassats: ./src/runtime/sbcl --core output/sbcl.core
2015-09-29T03:56:27Z stassats: * (machine-version)
2015-09-29T03:56:27Z stassats: "AArch64 Processor rev 0 (aarch64)"
2015-09-29T03:57:31Z loke: stassats: Can you tell me where in the SBCL codebase I can find the source for INTERN?
2015-09-29T03:57:44Z stassats: M-. on it?
2015-09-29T03:57:48Z stassats: /home/stas/lisp/impl/sbcl/src/code/target-package.lisp  (DEFUN INTERN)
2015-09-29T03:58:15Z loke: stassats: For some reason, M-. doesn't work on it. It gives me "No location"
2015-09-29T03:58:24Z stassats: loke: use the newest slime
2015-09-29T03:58:28Z loke: (and, the defknown in fndb.lisp)
2015-09-29T03:58:55Z stassats: nyef: thanks for assistance, that was a lot quicker
2015-09-29T03:59:17Z loke: stassats: I use the one from QL, is it not the latest?
2015-09-29T03:59:40Z stassats: apparently not
2015-09-29T04:00:16Z loke: stassats: That's disappointing.
2015-09-29T04:00:20Z stassats: building contribs, even worth trying?
2015-09-29T04:01:40Z nyef: stassats: No problem. I can imagine that tracking that mess down would have taken you a while, it took me a while the first time through.
2015-09-29T04:02:32Z stassats: compiled asdf
2015-09-29T04:03:02Z stassats: but that's about as much it could muster
2015-09-29T04:05:35Z stassats: next goalpost: merging in the next release
2015-09-29T04:08:05Z stassats: now that i can run tests, things should go much more pleasantly
2015-09-29T04:08:45Z stassats: and there is a lot of things to optimize, new instructions, more registers
2015-09-29T04:09:01Z stassats: finally the fun part after the two weeks of pain
2015-09-29T04:11:09Z nyef: Only two weeks? Lucky!
2015-09-29T04:12:01Z stassats: could be faster
2015-09-29T04:12:29Z stassats: had i made fewer mistakes
2015-09-29T04:16:07Z nyef: Well, I'm more thinking of the amount of time it took to get the original ARM port up and running, really.
2015-09-29T04:16:42Z stassats: that paved the way for the arm64 port
2015-09-29T04:17:20Z stassats: and you probably didn't have a fast arm machine
2015-09-29T04:22:36Z nyef: A Raspberry Pi, a Galaxy note 10.1 (original edition), and I don't think I ever set up my BeagleBone Black.
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2015-09-29T04:41:49Z stassats: oops
2015-09-29T04:41:51Z stassats: i can run slime
2015-09-29T04:42:40Z stassats: i need to teach slime about "arm64" though
2015-09-29T04:49:19Z stassats: next order of business would be getting the disassembler, to help with working on other parts
2015-09-29T04:52:39Z loke: stassats: This is pretty cool. What hardware are you using for testing?
2015-09-29T04:52:51Z stassats: a galaxy s6 phone
2015-09-29T04:52:58Z loke: Neat
2015-09-29T04:53:36Z loke: stassats: I'd love to play with that as well. When do you think it's at a point where others can mess with it?
2015-09-29T04:54:19Z stassats: about right now, but it won't build right away since i disabled warnings on unused variables
2015-09-29T04:55:09Z stassats: dunno, whether to remove unused variables or just implement complex-floats
2015-09-29T04:55:49Z stassats: loke: either way, later today or tomorrow
2015-09-29T04:55:50Z stassats: i guess
2015-09-29T04:56:16Z stassats: loke: what are you planning to run it on?
2015-09-29T04:56:37Z loke: stassats: The Android emulator probably, at least for now.
2015-09-29T04:56:51Z stassats: why android?
2015-09-29T04:57:07Z stassats: isn't qemu able to run aarch64?
2015-09-29T04:57:48Z loke: stassats: because that's my ultimate goal, to drive an android user interface from a cl backend
2015-09-29T04:58:15Z stassats: ok, you'd need sbcl.so, which isn't ready yet
2015-09-29T04:58:17Z loke: But yeah, initial arm-playing-arounding only requires qemu
2015-09-29T04:58:36Z stassats: which needs relocatable cores at first
2015-09-29T04:58:45Z loke: relocatable cores?
2015-09-29T04:58:54Z stassats: cores that can relocate, duh
2015-09-29T04:59:23Z loke: Cores can relocate? The only such case I can think of is the big.little architecture.
2015-09-29T04:59:34Z stassats: ha, not cpu cores
2015-09-29T04:59:41Z stassats: sbcl.core
2015-09-29T04:59:49Z loke: Ah, of course.
2015-09-29T05:00:10Z loke: Isn't that an incredibly difficult thig to achieve?
2015-09-29T05:00:19Z stassats: not really
2015-09-29T05:00:28Z stassats: the gc already relocates things
2015-09-29T05:00:43Z loke: Unless the entire runtime would be using relative addressing (like what was needed on the M68k before the advent of MMU's)
2015-09-29T05:00:52Z stassats: there even some work done by david on that
2015-09-29T05:02:25Z stassats: so, it's just a SMOP
2015-09-29T05:07:08Z loke: small matter of pain, perhaps
2015-09-29T05:07:21Z loke: serious matter of pain
2015-09-29T05:07:56Z nyef: Well, the worst of the pain from relocatable cores should have been dealt with years ago. There was a period where it couldn't relocate a cold-core successfully.
2015-09-29T05:08:28Z nyef: Umm... I think that it couldn't relocate read-only space, though, and possibly not static-space, either.
2015-09-29T05:08:28Z loke: All the ARM work is 32-bit so far I resume?
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2015-09-29T07:25:58Z yvm: Is setf'ing SAP with sap-ref-* slow? I mean very much slower than C's assignment.
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2015-09-29T07:26:46Z stassats: it's the same as c
2015-09-29T07:27:01Z yvm: Hmm.
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2015-09-29T14:14:23Z attila_lendvai: is there a mips backend? if so, how much ram is the base requirement of an sbcl image without any user code? did anyone try to use SBCL on some embedded linux distro like openwrt?
2015-09-29T14:31:51Z nyef: There is a MIPS backend. I don't know how much RAM it takes up. I've used it a time or two in a Debian chroot running on a dd-wrt box.
2015-09-29T14:36:08Z attila_lendvai: I'm currently porting/fixing ecl to openwrt, and wondered for a moment, whether I need to if I can make sbcl work
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2015-09-29T17:18:46Z stassats: ibm may sponsor the 64 bit ppc port
2015-09-29T17:19:30Z stassats: or "bounty" it
2015-09-29T17:20:07Z stassats: i'm not that interested in a bounty
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2015-09-29T17:20:41Z stassats: nyef: maybe you will be interested
2015-09-29T17:27:30Z stassats: say, if i'm not intersted in a bounty, can it go to the sbcl fund or something?
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2015-09-29T18:15:48Z nyef: I'm having a hard time keeping a working PPC system, for some reason.
2015-09-29T18:25:24Z stassats: i'm using the gcc compile farm
2015-09-29T18:25:37Z Xof: stassats: I'm fairly sure the SBCL account at the CL Foundation can invoice if you agree
2015-09-29T18:25:58Z Xof: on the other hand, I'm a bit stuck on what we can use the CL Foundation money for (I think we have ~$2000)
2015-09-29T18:26:02Z Xof: options on a postcard
2015-09-29T18:26:06Z Xof: how much of a bounty are we talking?
2015-09-29T18:26:08Z stassats: well, i'm busy finishing the arm64 port anyway
2015-09-29T18:26:22Z Xof: maybe we could use it to buy hardware
2015-09-29T18:26:39Z Xof: or pay me to travel to somewhere warm
2015-09-29T18:26:43Z stassats: no idea, he said "may be willing to put a bounty"
2015-09-29T18:26:57Z Xof: ok
2015-09-29T18:28:03Z stassats: this message http://article.gmane.org/gmane.lisp.steel-bank.devel/19223
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2015-09-29T18:34:26Z p_l: ... is bountysource somehow related to IBM? Or are they just going a bit spend-crazy? :D
2015-09-29T18:37:25Z stassats: LuaJIT IBM posted a $5,000 bounty to Add PPC64LE port.
2015-09-29T18:37:36Z stassats: 5000 is not bad
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2015-09-29T19:20:05Z fe[nl]ix: for a US programmer that's barely two weeks' money
2015-09-29T19:20:27Z stassats: that's about how much it should take porting SBCL
2015-09-29T19:25:24Z fe[nl]ix: that's because there's already a PPC32 port ?
2015-09-29T19:25:31Z stassats: yeah
2015-09-29T19:26:05Z fe[nl]ix: the GCC compile farm has an 128-core linux machine
2015-09-29T19:26:08Z fe[nl]ix: pretty impressive
2015-09-29T19:26:21Z stassats: yeah, htop is funny on it
2015-09-29T19:26:31Z stassats: can't see any processes
2015-09-29T19:26:39Z fe[nl]ix: hahaha
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2015-09-29T19:27:11Z fe[nl]ix: you can remove the cpu meters
2015-09-29T19:27:23Z stassats: i know, but it's still funny
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2015-09-29T20:02:54Z Xof: I think it'd be nice to see a bounty, even if you don't want it, stassats
2015-09-29T20:03:04Z Xof: to show that there is community / outside interest
2015-09-29T20:03:29Z Xof: also, I thought it would be good to do a user survey one of these months, to find out what people use sbcl for
2015-09-29T20:04:38Z stassats: but will they sponsor an AIX port?
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2015-09-29T20:05:22Z stassats: i got stuck on the assembler syntax last time i tried
2015-09-29T20:05:53Z stassats: moving xxx-assem.S into static space would solve that and other things
2015-09-29T20:07:58Z Xof: ah, AIX
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2015-09-29T20:30:46Z nyef: stassats: Umm... Dare I point out that we have a proof-of-concept for moving the trampolines to read-only space already?
2015-09-29T20:31:34Z nyef: From mid-November, last year.
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2015-09-29T20:34:35Z nyef: ... what other things would it solve, btw?
2015-09-29T20:53:59Z stassats: nyef: linkage table for the runtime
2015-09-29T20:54:15Z nyef: Hrm.
2015-09-29T20:54:29Z nyef: Well, do you want the link to the branch with the proof-of-concept again?
2015-09-29T20:54:36Z stassats: no
2015-09-29T20:56:22Z nyef: Should I forward-port it and request a pre-commit review?
2015-09-29T20:56:46Z nyef: Not that I can actually test all of it...
2015-09-29T20:57:14Z nyef: ... Ooh. There's some idea in here trying to escape, having to do with call_into_lisp on... alpha, hppa, or both.
2015-09-29T20:58:19Z nyef: Ah, well. Something for late October at the earliest, I think.
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2015-09-29T21:40:48Z stassats: could be enabled piecemeal
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2015-09-30T01:41:41Z dougk2: hey. at work we use a Lisp "linter" that may (or should) complain loudly if it thinks that every function you call is deprecated, as per email I just sent. We're still on 1.2.9, so ... it's not gonna break anything tomorrow, but will if we reintegrate from upstream sbcl any time soon.
2015-09-30T01:42:47Z stassats: was it introduced this cycle?
2015-09-30T01:43:00Z stassats: if not, then it can wait
2015-09-30T01:44:39Z stassats: but it's just a defknown change? then yeah
2015-09-30T01:44:46Z dougk2: i think scymtym put these in last release
2015-09-30T01:45:37Z dougk2: the issue is that the :function :deprecation info always existed, and you could always ask for it
2015-09-30T01:45:58Z dougk2: so the meaning of the information changed in such a way that a reasonable inquiry would be broken. It used to essentially be a boolean.
2015-09-30T01:48:58Z stassats: if it's just a change to define-info-type (:function :deprecated), then it can go in now
2015-09-30T01:49:09Z stassats: anything more extensive better wait
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2015-09-30T01:51:18Z stassats: looks everything should have or null?
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2015-09-30T06:14:06Z Xof: (aiming to release today)
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2015-09-30T12:42:38Z scymtym: dougk_: should i change the :type-spec options from deprecation-info to (or null deprecation-info) for all deprecation related info types, then?
2015-09-30T12:45:06Z scymtym: do i have to add :default nil as well?
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2015-09-30T14:44:03Z scymtym_: dougk_: regardless of the current issue, wasn't :variable deprecation the one that has always been stored in globaldb?
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2015-09-30T15:00:43Z dougk_: scymtym_: that's why i wasn't sure if it was a regression. :variable was always present. So to fix it, you'll want the "or" in the type don't need a default. The default-default is nil.
2015-09-30T15:05:31Z scymtym_: dougk_: thanks, will commit soon
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2015-09-30T20:23:11Z Fare: who's hacking sbcl/windows, these days, if anyone?
2015-09-30T20:23:33Z stassats: i am
2015-09-30T20:26:02Z Fare: can you help with our run-program issues?
2015-09-30T20:26:12Z stassats: not now
2015-09-30T20:26:16Z Fare: ok
2015-09-30T20:26:35Z stassats: but did it work before?
2015-09-30T20:26:47Z Fare: a way to access the low-level windows API would help
2015-09-30T20:26:51Z Fare: not really
2015-09-30T20:26:56Z Fare: it had different bugs
2015-09-30T20:28:19Z Fare: sbcl used to fail to quote arguments properly, but we could work around that. Now it quotes properly but fails to provide access to raw command line, and that breaks some things
2015-09-30T20:28:44Z stassats: i fixed quoting a long time ago
2015-09-30T20:29:01Z Fare: I believe uiop:run-program changed its assumptions as to what ought to work about sbcl's run-program, but that causes some things to break
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