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On Fri, Apr 1, 2016 at 4:34 PM Mark Wielaard <mjw@redhat.com> wrote: > > It does have documentation, but it is indeed not as full as we would > like. Please take a look at libdw.h and libdwfl.h > For someone who is familiar with ELF innards maybe, but for someone who just wants backtrace and symbol names not so much :-) > If you really need an in-process unwinder then I would recommend you > take a look at the libbacktrace from the GCC project: > https://gcc.gnu.org/viewcvs/gcc/trunk/libbacktrace/ I really do. Not only for logging after segmentation fault, but also for watchdog feature: print stack trace if program stuck somewhere and could not rewind SIGALRM timeout in time. I have found standalone fork of libbacktrace ( https://github.com/ErwanLegrand/libbacktrace <https://github.com/ErwanLegrand/libbacktrace_>) and will try it. Thank you. > If you just want to get a good backtrace when you get a SIGSEGV or other > fatal signal it makes sense to just call eu-stack -P TID on yourself. > fork and exec are signal safe. And then you don't have to try to deal > with a possibly corrupt program. > It would be fine for SIGSEGV case, but not for watchdog (SIGALRM) case. Thanks again for rapid answer!
It does have documentation, but it is indeed not as full as we would
like. Please take a look at libdw.h and libdwfl.h
If you really need an in-process unwinder then I would recommend you
take a look at the libbacktrace from the GCC project:
https://gcc.gnu.org/viewcvs/gcc/trunk/libbacktrace/
If you just want to get a good backtrace when you get a SIGSEGV or other
fatal signal it makes sense to just call eu-stack -P TID on yourself.
fork and exec are signal safe. And then you don't have to try to deal
with a possibly corrupt program.
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