In article <1m08d7u.12s2qk7npk1nm%m...@netbsd.org>,
Emmanuel Dreyfus <m...@netbsd.org> wrote:
>Martin Husemann <mar...@duskware.de> wrote:
>
>> So ifdef and port it to our libunwind ;-)
>
>It does not seems obvious.
>
>I now have this:
>
>// stacktrace using libunwind
>DLLEXPORT size_t rec_backtrace(ptrint_t *data, size_t maxsize)
>{
>#ifdef __NetBSD__
> return backtrace(data, maxsize);
>#else
> unw_context_t uc;
> unw_getcontext(&uc);
> return rec_backtrace_ctx(data, maxsize, &uc);
>#endif
>}
>
>It gets a SIGSEGV in backtrace() and crashes again in signal handler for the
>same reason. I am not sure why __builtin_frame_address(3) meets trouble.
>
>#0 0x00007f7ff520d26e in getframeaddr (level=2) at stacktraverse.c:153
>#1 0x00007f7ff5200939 in backtrace (buffer=<optimized out>, size=80000)
> at execinfo.c:60
which execinfo.c or libexecinfo are you linking against? It does not
seem to be the one in the base system...
christos
