debug help request

[Joel Sherrill]

FWIW I quadrupled the stack sizes in this test and it did not help.

I also determined that the address being reported as being freed on
the SPARC corresponds to an address that was allocated. 

It looks like  it is being allocated from the workspace by libc_create_hook.
That means that this could be a case of something writing beyond their
allocated memory.  So this one needs to be fixed.

I will have to let this sit overnight ... if someone has an insight, it
would be greatly appreciated.

--joel

Joel Sherrill wrote:
> Hi,
>
> psx06 fails on sparc and mips during the pthread_exit.  It gets
> an exception while doing a _Heap_Free.  I am totally disgusted
> and confused at this point because on sparc, it appears that
> every local variable of interest has been optimized away and
> the backtrace is of little help.
>
> On mipsjmr3904, the stack track is:
>
> (gdb) bt
> #0  0xffffffff8800b468 in _Heap_Free ()
> #1  0xffffffff880027d4 in libc_delete_hook ()
> #2  0xffffffff8800e3ec in _User_extensions_Thread_delete ()
> #3  0xffffffff8800c860 in _Thread_Close ()
> #4  0xffffffff880060e4 in pthread_exit ()
> #5  0xffffffff8800084c in Task_2 ()
> #6  0xffffffff88013fec in _Thread_Handler ()
> #7  0xffffffff88013ee0 in _Thread_Evaluate_mode ()
> #8  0xffffffff88013ee0 in _Thread_Evaluate_mode ()
>
> On PowerPC/psim it appears to work OK.
>
> Can someone give it a try on their target and see if they can
> figure out what the bug is?
>
> Thanks.
>
> --joel
>
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