problems with pthread library

problems with pthread library

[rodrigo]

Hello group:



I'm begining to migrate a 10k lines of code project to use the GNU tools.



I'm using eclipse 3.1 & CDT + latest Cygwin.



I have rewrite the OS Layer to begin use pthread library for

multi-threading capabilites.



When i try to debug my program i note the CPU going almost 100% with my

program & gdb.exe taking most of it. The program never goes further.



If i run the program without the debugger everything goes well.



So i decided to investigate more and found where the program hangs.

I found that when creating mutexes the debugger get lost. Not after the

first call but after a couple of invocation of 'pthread_mutex_init' &

'pthread_cond_init'.



I can repro the similar problem without using eclipse but directly using

cygwin and gdb.



Any hints on what is going on ?

Thanks,

Rodrigo.

RE: problems with pthread library

[Dave Korn]

----Original Message----
>From: rodrigo
>Sent: 05 August 2005 14:28

> Hello group:

  ¡Hola! Rodrigo,

> I have rewrite the OS Layer to begin use pthread library for
> multi-threading capabilites.

> So i decided to investigate more and found where the program hangs.
> I found that when creating mutexes the debugger get lost. Not after the
> first call but after a couple of invocation of 'pthread_mutex_init' &
> 'pthread_cond_init'.

> Any hints on what is going on ?

  I think there is a bug in pthread_cond_* or pthread_mutex_* functionality
in cygwin at the moment.  If you roll back your cygwin dll version to 1.5.17
(using the 'prev' button in the cygwin setup.exe), does that fix it?


    cheers,
      DaveK
-- 
Can't think of a witty .sigline today....

RE: problems with pthread library

[Rodrigo Varas]

Hello Dave,

Thanks for your reply.

I can go back to a previous cygwin but how to explain that the application
start normally without any debugging involved ?

Rodrigo.

-----Original Message-----
From: Dave Korn [mailto:dave.korn@artimi.com] 
Sent: Friday, August 05, 2005 10:26 AM
To: rodrigo@tekchile.cl; gdb@sources.redhat.com
Subject: RE: problems with pthread library

----Original Message----
>From: rodrigo
>Sent: 05 August 2005 14:28

> Hello group:

  ¡Hola! Rodrigo,

> I have rewrite the OS Layer to begin use pthread library for
> multi-threading capabilites.

> So i decided to investigate more and found where the program hangs.
> I found that when creating mutexes the debugger get lost. Not after the
> first call but after a couple of invocation of 'pthread_mutex_init' &
> 'pthread_cond_init'.

> Any hints on what is going on ?

  I think there is a bug in pthread_cond_* or pthread_mutex_* functionality
in cygwin at the moment.  If you roll back your cygwin dll version to 1.5.17
(using the 'prev' button in the cygwin setup.exe), does that fix it?


    cheers,
      DaveK
-- 
Can't think of a witty .sigline today....