Hi,

I've never used Threads or Ttrace before, but now I'm setting up Threads
to speed up my program.
When sourcing a tcl file there's a segfault.
Ttrace seems to be recommended to track the problem.

When I attempt
> package require Ttrace

there's the error:
"""attempt to provide package ttrace 2.9b1 failed: no version of package
ttrace provided"""

The Thread version installed in /usr/local/lib is 2.9b1.

In the book "The Tcl Programming Language" there's no mention that I can
see about installing it from other source.
A grep seems to point to the lib/ttrace.tcl as the source of it, inside
the tcllib directory.
There's almost no information I can gather from web searches about this.

What should I do to be able to use Ttrace?

Thank you,

Luís

Am 06.06.24 um 17:31 schrieb Luis Mendes:
> Hi,
>
>
> I've never used Threads or Ttrace before, but now I'm setting up Threads
> to speed up my program.
> When sourcing a tcl file there's a segfault.
> Ttrace seems to be recommended to track the problem.
>
> When I attempt
>> package require Ttrace
>
> there's the error:
> """attempt to provide package ttrace 2.9b1 failed: no version of package
> ttrace provided"""
>
> The Thread version installed in /usr/local/lib is 2.9b1.
>
> In the book "The Tcl Programming Language" there's no mention that I can
> see about installing it from other source.
> A grep seems to point to the lib/ttrace.tcl as the source of it, inside
> the tcllib directory.
> There's almost no information I can gather from web searches about this.
>
> What should I do to be able to use Ttrace?
>
> Thank you,
>
>
>
> Luís

Hello,

#I install thread with debian:

apt install tcl-thread

#then only load Ttrace

$ tclsh
tclsh8.6 [~] package require Ttrace
2.8.9

ttrace a sub-package of Thread
https://wiki.tcl-lang.org/page/thread#353f24e94d86afdaa5cb728f6043bfcda92083ab8ecc28555c48fe6156cde70d

Gregor

On 6/6/2024 11:31 AM, Luis Mendes wrote:
>
> When I attempt
>> package require Ttrace
>
> there's the error:
> """attempt to provide package ttrace 2.9b1 failed: no version of package
> ttrace provided"""
>
> The Thread version installed in /usr/local/lib is 2.9b1.

That is an interesting version number! Is it perhaps some kind of a beta
version that may not have been built properly?

>
> In the book "The Tcl Programming Language" there's no mention that I can
> see about installing it from other source.

AFAIK,it comes with the Thread package. It is a plain Tcl file.

> What should I do to be able to use Ttrace?
>

Just a proper installation of the Thread package, I suppose.

You could start here: https://core.tcl-lang.org/index.html

On 6/6/2024 8:31 AM, Luis Mendes wrote:
> Hi,
>
>
> I've never used Threads or Ttrace before, but now I'm setting up Threads
> to speed up my program.
> When sourcing a tcl file there's a segfault.

You likely will need to narrow this down, i.e. what statement causes the segfault. Place vwait forever in the file at 1/2, 1/4, .... points until you find it.

However, from what you are doing, you might just first try to package require Thread to see if that crashes.

> Ttrace seems to be recommended to track the problem.
>
> When I attempt
>> package require Ttrace
>
> there's the error:
> """attempt to provide package ttrace 2.9b1 failed: no version of package
> ttrace provided"""
>
> The Thread version installed in /usr/local/lib is 2.9b1.
>
> In the book "The Tcl Programming Language" there's no mention that I can
> see about installing it from other source.
> A grep seems to point to the lib/ttrace.tcl as the source of it, inside
> the tcllib directory.
> There's almost no information I can gather from web searches about this.
>
> What should I do to be able to use Ttrace?
>
> Thank you,
>
>
>
> Luís

The 2.9b1 is suspicious to me.

What version of tcl are you running, i.e. info patch

If the crash is not from,

package require Thread

Is it also 2.9b1 ?

That indicates a beta version. Typically, I only see beta versions of Thread or Ttrace (which usually both have the same version) when I am building my own beta version of tcl from a source kit, e.g. 9.0b1.

I would guess you may have a mixed up tcl system. Typically the same pkgIndex.tcl file handles the ifneeded for both the thread .so which is loaded and the file ttrace.tcl (which ends up being sourced).

Obviously, more info is needed to help out here.

On the other hand, if you can, you probably should just install a complete version of tcl.