[PATCH 5/5] Add frame pointer unwinding for aarch64

Ulf Hermann ulf.hermann@qt.io
Tue Apr 25 21:55:00 GMT 2017


On 04/25/2017 02:49 PM, Mark Wielaard wrote:
> From: Ulf Hermann <ulf.hermann@qt.io>
> 
> If we don't find any debug information for a given frame, we usually
> cannot unwind any further. However, the binary in question might have
> been compiled with frame pointers, in which case we can look up the
> well known frame pointer locations in the stack snapshot and use them
> to bridge the frames without debug information.

Looks good to me.

> +# The binary is generated by compiling with eh_frame CFI, but with frame
> +# pointers.
> +#
> +# gcc -static -O2 -fno-omit-frame-pointer -fno-asynchronous-unwind-tables \
> +#     -D_GNU_SOURCE -pthread -o tests/backtrace.aarch64.fp.exec -I. -Ilib \
> +#     tests/backtrace-child.c#

Trailing '#', but that is insignificant.

Ulf



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