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2 total messages Started by David Anderson Mon, 18 Mar 2002 20:09
Re: Can't debug multithreaded apps on mips-sgi-irix-6.5
#2492
Author: David Anderson
Date: Mon, 18 Mar 2002 20:09
45 lines
2645 bytes
Richard Tollerton <tollert@meru.rnet.missouri.edu> writes:
>Environment: SGI Octane (MIPS R10K 64-bit mode) running IRIX 6.5; gcc
>3.0.4 with gcc 2.95.3 tested previously. SGI development tools include the
>MIPSPro 7.3 toolchain. gdb version is 5.1.1 with 5.0 used previously.
>
>Description: Any multithreaded app cannot be debugged with gdb; it hangs
>on application startup. I've tested this with my code (~7000-line Qt C++
>app), somebody else's GLUT app, and this one-liner test case that doesn't 
>even use threads:

Unfortunately, gdb does not yet support IRIX pthreads.
Even if gdb did not hang the  result would not be useful.

There is a special shared library, libspypt.so, to interact
with IRIX pthreads and we've not documented the interface 
nor shipped the headers.  Oops.
It's unfortunately not like any existing pthreads interface.
Partly because IRIX pthreads are all *within* one process
as of IRIX6.5 -- very different than say Linux.
ptrace is useless for this and /proc required considerable
extension.

The problem is we just did not get around to shipping or documenting
anything on this (libspypt.so is shipped, but
not the headers needed to compile code to interact
with libspypt.so). 
This is  not 'secret'.
We've provided the headers (and some documentation) to
some people, but that does not yet directly help gdb.

Yes, I'm somewhat embarrassed by this, but
I have not had time to be any help.

Anyone wishing to volunteer on this will need help
from us and should contact me.

Sorry. At this time your only choices are
a) try ddd or some other gui that 'hides' the dbx-ness
   of dbx on IRIX
   (to the extent such do, I _still_ have not tried ddd)
b) use dbx or Workshop on IRIX.

Again, sorry. Not what you wanted to hear.
davea@sgi.com
Re: Can't debug multithreaded apps on mips-sgi-irix-6.5
#2354
Author: Andrew Cagney
Date: Thu, 04 Apr 2002 14:49
60 lines
3304 bytes
So that people know about this problem, can I suggest creating a 
change-request describing it.  See:

http://sources.redhat.com/gdb/bugs/

As David suggests, someone adding support for this would be great as 
well.  If you're interested and don't have an FSF assignment (or don't 
know what one is) let me know.

Andrew



> Richard Tollerton <tollert@meru.rnet.missouri.edu> writes:
> 
>>Environment: SGI Octane (MIPS R10K 64-bit mode) running IRIX 6.5; gcc
>>3.0.4 with gcc 2.95.3 tested previously. SGI development tools include the
>>MIPSPro 7.3 toolchain. gdb version is 5.1.1 with 5.0 used previously.
>>
>>Description: Any multithreaded app cannot be debugged with gdb; it hangs
>>on application startup. I've tested this with my code (~7000-line Qt C++
>>app), somebody else's GLUT app, and this one-liner test case that doesn't 
>>even use threads:



> Unfortunately, gdb does not yet support IRIX pthreads.
> Even if gdb did not hang the  result would not be useful.
> 
> There is a special shared library, libspypt.so, to interact
> with IRIX pthreads and we've not documented the interface 
> nor shipped the headers.  Oops.
> It's unfortunately not like any existing pthreads interface.
> Partly because IRIX pthreads are all *within* one process
> as of IRIX6.5 -- very different than say Linux.
> ptrace is useless for this and /proc required considerable
> extension.
> 
> The problem is we just did not get around to shipping or documenting
> anything on this (libspypt.so is shipped, but
> not the headers needed to compile code to interact
> with libspypt.so). 
> This is  not 'secret'.
> We've provided the headers (and some documentation) to
> some people, but that does not yet directly help gdb.
> 
> Yes, I'm somewhat embarrassed by this, but
> I have not had time to be any help.
> 
> Anyone wishing to volunteer on this will need help
> from us and should contact me.
> 
> Sorry. At this time your only choices are
> a) try ddd or some other gui that 'hides' the dbx-ness
>    of dbx on IRIX
>    (to the extent such do, I _still_ have not tried ddd)
> b) use dbx or Workshop on IRIX.
> 
> Again, sorry. Not what you wanted to hear.
> davea@sgi.com
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