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on Functional Programming (ICFP 2010)
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I'm getting segmentation faults when using dynamically linked native
code in 64-bit OCaml 3.11 running
on Linux (Fedora 12 x64).
The .cmxs file loads fine. There's a glue module that's "open"d in
the code for the dynamic module, and
linked against the main program. The dynamic module calls funct
Le 23/08/2010 12:57, Paul Steckler a écrit :
> I'm getting segmentation faults when using dynamically linked native
> code in 64-bit OCaml 3.11 running
> on Linux (Fedora 12 x64). [...]
> I've written some small example programs with a similar structure, and
> those work just fine. In my real,
> l
On Mon, Aug 23, 2010 at 9:06 PM, Stéphane Glondu wrote:
> Does your real large program use C bindings? Are you able to reproduce
> the segfaults with pure OCaml code?
Yes, the large program has C bindings, including calls into dynamically loaded
.so files (Linux dynamic libraries). Anything I sh
On Mon, Aug 23, 2010 at 09:47:43PM +1000, Paul Steckler wrote:
> On Mon, Aug 23, 2010 at 9:06 PM, Stéphane Glondu wrote:
> > Does your real large program use C bindings? Are you able to reproduce
> > the segfaults with pure OCaml code?
>
> Yes, the large program has C bindings, including calls in
On Thu, 19 Aug 2010 07:52:33 -0400, Ethan Burns wrote:
>
> let r = ref 0.0 ;;
> for i = 0 to 10 do r := float i done;
> Printf.printf "%f\n" !r;
> Printf.printf "words: %f\n" (Gc.stat ()).Gc.minor_words
To add a precision to others' answers : float refs are unboxed
_locally_. If you rewr
Le dimanche 22 août 2010 01:30:28, Jeffrey Barber a écrit :
> Is there a way to get a string from C to OCaml without the caml_copy_string
> function, or is there a version that doesn't copy the string?
an alternative method is to provide a string from ocaml to c then c fills this
buffer, then you
On Mon, Aug 23, 2010 at 10:05 PM, Mark Shinwell
wrote:
> It can be a time-consuming task, but double-check all the rules on
> http://caml.inria.fr/pub/docs/manual-ocaml/manual032.html are being followed.
> For example, watch out for things like variables of type [value] that are
> wrongly not prot
On Mon, Aug 23, 2010 at 8:06 AM, Christophe TROESTLER
wrote:
> On Thu, 19 Aug 2010 07:52:33 -0400, Ethan Burns wrote:
>>
>> let r = ref 0.0 ;;
>> for i = 0 to 10 do r := float i done;
>> Printf.printf "%f\n" !r;
>> Printf.printf "words: %f\n" (Gc.stat ()).Gc.minor_words
>
> To add a precis
Here are also a few tips (also in the comments) to chase that bug.
http://rwmj.wordpress.com/2010/01/22/tip-tracking-down-ocaml-heap-corruptors/
Daniel
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On 23 Aug 2010, at 13:12, Paul Steckler wrote:
> On Mon, Aug 23, 2010 at 10:05 PM, Mark Shinwell
> wrote:
>
>> Have you tried using gdb to determine the stack backtrace when it segfaults?
>> Also, if it can be done without disturbing too much code, it might be worth
>> trying to eliminate Dynlin
On 23-08-2010, Ethan Burns wrote:
> On Mon, Aug 23, 2010 at 8:06 AM, Christophe TROESTLER
> wrote:
>> On Thu, 19 Aug 2010 07:52:33 -0400, Ethan Burns wrote:
>>>
>>> let r = ref 0.0 ;;
>>> for i = 0 to 10 do r := float i done;
>>> Printf.printf "%f\n" !r;
>>> Printf.printf "words: %f\n" (Gc
Le 23/08/2010 14:09, Florent Monnier a écrit :
>> Is there a way to get a string from C to OCaml without the caml_copy_string
>> function, or is there a version that doesn't copy the string?
>
> an alternative method is to provide a string from ocaml to c then c fills
> this
> buffer, then you c
On Mon, Aug 23, 2010 at 4:42 PM, Sylvain Le Gall wrote:
> On 23-08-2010, Ethan Burns wrote:
>> On Mon, Aug 23, 2010 at 8:06 AM, Christophe TROESTLER
>> wrote:
>>> On Thu, 19 Aug 2010 07:52:33 -0400, Ethan Burns wrote:
let r = ref 0.0 ;;
for i = 0 to 10 do r := float i done;
Le lundi 23 août 2010 14:59:19, Stéphane Glondu a écrit :
> Le 23/08/2010 14:09, Florent Monnier a écrit :
> >> Is there a way to get a string from C to OCaml without the
> >> caml_copy_string function, or is there a version that doesn't copy the
> >> string?
> >
> > an alternative method is to pr
Hi Kaustuv,
On 2010-06-08, at 20:22, Kaustuv Chaudhuri wrote:
>> Of course intify can cause a segmentation fault!
>>
>> # let arr = Array.of_list [intify 1.0; 0];;
>> Segmentation fault
>
> This may be splitting hairs, but the reason that fails is that
> Array.of_list's ad hoc polymorphism heur
Le 23/08/2010 14:12, Paul Steckler a écrit :
> [...]
> Oh, we just added the Dynlink stuff. There haven't been any recent
> crashes until
> just now. That could be an unhappy coincidence; the real issue might
> lurk in unrelated
> code, as you point out.
Note that Dynlink can point out bugs (eve
Le lundi 23 août 2010 07:09:05, Florent Monnier a écrit :
> an alternative method is to provide a string from ocaml to c then c fills
> this buffer, then you can save allocations by reusing the same buffer,
> see:
This is a good idea but I would be a little bit suspicious about using
"noalloc".
On Sat, Aug 21, 2010 at 8:27 PM, Jeffrey Barber wrote:
> example code:
> http://github.com/mathgladiator/node.ocaml/blob/master/test/kvp.ml
Have you considered using Lwt (http://ocsigen.org/lwt) as a layer on
top of raw continuation-passing style? It has a lot of nice functions
for writing asynch
Is there any tutorial on why such features are useful ?
Concrete examples of their use. For instance can you implement
python generators and its yield stuff by using this library ?
The only reference mentioned in the source is a technical report that
does not look very easy to read.
On Aug 22, 2
Hello,
No I haven't, thanks for the link. In looking through the docs, it seems
similiar at some level to what I am doing. I'm trying to get away from the
language of threading (In my code, I use chain and io_pumps for context
storage) since I'm thinking of node.ocaml as an event based io library.
You may also look at ocamlnet
(http://projects.camlcity.org/projects/ocamlnet.html), which provides a
stack of abstractions for event-driven programming:
- The Netsys library defines an object type for sets of file
descriptors one can poll:
http://projects.camlcity.org/projects/dl/ocamlnet-3.0t
On Mon, Aug 23, 2010 at 2:38 PM, Yoann Padioleau wrote:
> Is there any tutorial on why such features are useful ?
> Concrete examples of their use. For instance can you implement
> python generators and its yield stuff by using this library ?
Here is an example of a particular use of Delimcc to i
Yoann Padioleau wrote:
> Is there any tutorial on why such features are useful ?
> Concrete examples of their use.
Thank you for the question! I think you may find many examples
of delimited continuations on the following web site:
http://okmij.org/ftp/Computation/Continuations.html
Nota
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