SigSegV during stack unwind (AIX)


 
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Old 09-07-2008
SigSegV during stack unwind (AIX)

Hi
I am getting a strange segmentation fault during the unwind
process. I am trying to throw an object of an Exception class.
During the DoThrow (in libC.a) the stack starts growing until a
Signal is received.
The object thrown is of a class that inherits from a common class,
and the signal only appears rarely - but consistently when it does appear.

I am useing xlC V8 on Aix 5.3 . Dod anyone experience/heard of something like this ? Could it be a copiler problem ?

Thanks
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uwx_set_nofr(3X)														  uwx_set_nofr(3X)

NAME
uwx_set_nofr() - disable tracking of floating-point registers SYNOPSIS
DESCRIPTION
is part of the Unwind Express Library for Integrity systems; see uwx(3X). disables the tracking of floating-point registers during the stack unwind process. This can be used to improve unwind performance for applications that do not need to inspect the values of the pre- served floating-point values. Tracking of floating-point registers is disabled for the unwind environment named in the env parameter; other unwind environments are not affected. It is not currently possible to re-enable the tracking of floating-point registers without creating a new unwind environment. Parameters env A pointer to an unwind environment object. RETURN VALUE
returns on success. See uwx(3X) for error codes. AUTHOR
The Unwind Express Library was developed by Hewlett-Packard. SEE ALSO
uwx(3X), uwx_add_to_bsp(3X), uwx_find_source_info(3X), uwx_find_symbol(3X), uwx_free(3X), uwx_get_abi_context_code(3X), uwx_get_func- start(3X), uwx_get_module_info(3X), uwx_get_nat(3X), uwx_get_reg(3X), uwx_get_source_info(3X), uwx_get_sym_info(3X), uwx_init(3X), uwx_init_context(3X), uwx_register_alloc_cb(3X), uwx_register_callbacks(3X), uwx_release_symbol_cache(3X), uwx_self_do_context_frame(3X), uwx_self_free_info(3X), uwx_self_init_context(3X), uwx_self_init_info(3X), uwx_set_remote(3X), uwx_step(3X), uwx_step_inline(3X). Integrity Systems Only uwx_set_nofr(3X)