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3041 discussions

cycle detection and destroy()
by Arne Goedeke 20 Feb '15

20 Feb '15

The destruction of objects is deferred. this leads to destroy() being called at some later point (after error, function return, some io handling, etc). when destroy() calls any code which has cycle detection, this can lead to spurious errors. Imagine a destroy function which calls sprintfs with some global object (e.g. Val.null). Similar problems arise when destroy is called while some mutex lock is being held and destroy() tries to aquire the same lock. Of course in that case the cycle detection simply guards against deadlock. What kinds of things can safely be done from within destroy() and should we document them? arne

4 3

%x on strings
by Martin Nilsson (Opera Mini - AFK!) ＠ Pike (-) developers forum 17 Feb '15

17 Feb '15

How about making %x and %X work on strings to hexcode them?

3 6

Re: gdb_backtraces()
by Chris Angelico 10 Feb '15

10 Feb '15

On Wed, Feb 11, 2015 at 1:45 AM, Mirar @ Pike developers forum <10353(a)lyskom.lysator.liu.se> wrote: > What's the git command to get whatever git is calling the head > revision of Pike? (I presume it's there.) Not sure what you mean. You can get the exact commit hash: $ git rev-parse HEAD dffaa5d5405548d2f35355bd749e10bf8a2fc026 Or the symbolic name, which identifies the branch: $ git rev-parse --symbolic-full-name HEAD refs/heads/8.1 The meaning of HEAD will depend on what's checked out, if you're looking at a local (non-bare) clone of the repo. ChrisA

3 2

Re: gdb_backtraces()
by Mirar ＠ Pike developers forum 10 Feb '15

10 Feb '15

I probably need some sort of URL too?

1 0

gdb_backtraces()
by Mirar ＠ Pike developers forum 10 Feb '15

10 Feb '15

Should gdb_backtraces() still work in 8.0? (gdb) call gdb_backtraces() Program received signal SIGSEGV, Segmentation fault. 0x0005e0c4 in gdb_backtrace (thread_id=<optimized out>) at /home/pi/Pike-v8.0.10/src/interpret.c:3345 3345 args = DO_NOT_WARN((INT32) MINIMUM(f->num_args, Pike_sp - f->locals)); The program being debugged was signaled while in a function called from GDB. GDB remains in the frame where the signal was received. To change this behavior use "set unwindonsignal on". Evaluation of the expression containing the function (gdb_backtraces) will be abandoned. When the function is done executing, GDB will silently stop. (gdb) p *f $2 = {refs = 1, args = 1, fun = 9, num_locals = 1, num_args = 1, flags = 0, ident = 0, next = 0x1f7bd84, scope = 0x0, pc = 0x0, return_addr = 0x200336f "\024\217-", locals = 0xb6ac5098, save_sp = 0xb6ac5090, expendible = 0xb6ac5098, save_mark_sp = 0xb6a63000, mark_sp_base = 0xb6a63000, current_object = 0x1f78608, current_program = 0x1f726ec, context = 0x1f858dc, current_storage = 0x1f8ef50 "`\357\370\001\003"} (gdb) p *Pike_interpreter_pointer Cannot access memory at address 0x0 (gdb) info threads Id Target Id Frame * 2 Thread 0xb65c4470 (LWP 19748) "pike" 0xb6e9e250 in nanosleep () from /lib/arm-linux-gnueabihf/libpthread.so.0 1 Thread 0xb6fde000 (LWP 19742) "pike" 0x0005e0c4 in gdb_backtrace (thread_id=<optimized out>) at /home/pi/Pike-v8.0.10/src/interpret.c:3345 Both threads look like normal pike interpreter threads, except the one with the crashed gdb_backtraces() on top. This is repeatable, but not from just running Hilfe. ARM (Pi).

3 3

Re: Build failure when HAVE_NETTLE_ECDSA_H not set
by Chris Angelico 07 Feb '15

07 Feb '15

On Sat, Feb 7, 2015 at 10:30 PM, Henrik Grubbström (Lysator) @ Pike (-) developers forum <10353(a)lyskom.lysator.liu.se> wrote: > These symbols are only useful when ECC is available, so they should be > guarded in the same way as their definitions. > > Fixed. > > Thanks for the report. Thanks, working nicely! ChrisA

1 0

Build failure when HAVE_NETTLE_ECDSA_H not set
by Chris Angelico 07 Feb '15

07 Feb '15

/home/rosuav/pike/src/post_modules/Nettle/hogweed.cmod:1008:1: error: ‘SECP192R1’ undeclared (first use in this function) The symbols are defined inside a block guarded by HAVE_NETTLE_ECDSA_H, but then are used in hogweed_init, which is unguarded. One possible fix would be to move the defines outside the HAVE_ block; branch rosuav/survive_no_nettle_ecdsa does this. Is this the right approach, or is there a better way? ChrisA

2 1

Small tweak to Process.run() new feature
by Chris Angelico 06 Feb '15

06 Feb '15

In Pike 8.1, Process.run() will accept functions for stdout and stderr, as was discussed here a while ago. I just tweaked that to check for *callables* rather than specifically functions, which allows easy tee'ing of the output: Process.run( ({"some_command","with","args"}), (["stdout":({write,Stdio.File("output.txt","wct")->write}) ]) ); Maybe my idea of coolness is disrupted by the 36 degree weather we're having here at the moment, but I just love the idea of putting multiple outputs simply as multiple functions! ChrisA

1 0

VALS Semester of Code - project pike packaging
by Martin Bähr 12 Jan '15

12 Jan '15

(resend with the right subject, sorry) hi, i am a mentor at FOSSASIA which has been accepted as a mentor organisation for VALS Semester of Code. You can read more about this program at http://semesterofcode.com/ and http://vps2.semesterofcode.com One of the projects i am proposing is to build pike packages for all major linux distributions. This may not be much for a 3 month project, but i expect the student to work on submitting the packages, so they not only need to run, but follow the distributions requirements. I'd like to invite pike developers to join me as mentors for this project, and also offer you to mentor other pike related projects. Registration for mentors is by invitation, so if you are able to mentor projects please send me an email with details about projects you would like to mentor. We only have a short time to register mentors and list projects, so please reply as soon as you can. The name of the project Describe the project At a minimum, please include the expected outcome of the project, a potential mentor, the skills and/or languages required to complete the project, and a general "difficulty" level. The project should take about 3 months to complete. Please bear in mind that it's better to start with a smaller project that can be extended if your student proves to be capable rather than have an over-ambitious idea which can't be completed in time. The url of this project This could be for example a link to a bug tracker issue or google doc that describes the project idea. Some tags to facilitate searching (Delimited by comma i.e. php, javascript, html) greetings, martin. -- eKita - the online platform for your entire academic life -- eKita - the online platform for your entire academic life -- chief engineer eKita.co pike programmer pike.lysator.liu.se caudium.net societyserver.org secretary beijinglug.org mentor fossasia.org foresight developer foresightlinux.org realss.com unix sysadmin Martin Bähr working in china http://societyserver.org/mbaehr/

1 0

VALS Semester of Code - project use-mail
by Martin Bähr 12 Jan '15

12 Jan '15

hi, i am a mentor at FOSSASIA which has been accepted as a mentor organisation for VALS Semester of Code. You can read more about this program at http://semesterofcode.com/ and http://vps2.semesterofcode.com One of the projects i am proposing is to build pike packages for all major linux distributions. This may not be much for a 3 month project, but i expect the student to work on submitting the packages, so they not only need to run, but follow the distributions requirements. I'd like to invite pike developers to join me as mentors for this project, and also offer you to mentor other pike related projects. Registration for mentors is by invitation, so if you are able to mentor projects please send me an email with details about projects you would like to mentor. We only have a short time to register mentors and list projects, so please reply as soon as you can. The name of the project Describe the project At a minimum, please include the expected outcome of the project, a potential mentor, the skills and/or languages required to complete the project, and a general "difficulty" level. The project should take about 3 months to complete. Please bear in mind that it's better to start with a smaller project that can be extended if your student proves to be capable rather than have an over-ambitious idea which can't be completed in time. The url of this project This could be for example a link to a bug tracker issue or google doc that describes the project idea. Some tags to facilitate searching (Delimited by comma i.e. php, javascript, html) greetings, martin. -- eKita - the online platform for your entire academic life -- chief engineer eKita.co pike programmer pike.lysator.liu.se caudium.net societyserver.org secretary beijinglug.org mentor fossasia.org foresight developer foresightlinux.org realss.com unix sysadmin Martin Bähr working in china http://societyserver.org/mbaehr/

1 0

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