On 12-02-13 3:45 AM, Ken Werner wrote:
On 02/13/2012 03:57 AM, Jordan Schidlowsky wrote:
I've been following Ken Werner's work on getting libunwind ported to
the android platform. I was delighted to see an Android.mk on his
branch!
I've followed through the instructions listed here:
https://wiki.linaro.org/WorkingGroups/ToolChain/Outputs/LibunwindDebuggerd
I have been trying to get the library built however I've been running
into brick wall after brick wall. Has anyone successfully built the
library and used it locally in a native android application? Any
help would be appreciated.
Hi Jordan,
Local unwinding relies on 'dl_iterate_phdr'- a functionality that
bionic (the libc) doesn't seem to provide[1] to external users. I
think, you'd have to change either bionic or libunwind. In addition,
Android uses a different build system that require you to create an
Android.mk[2].
Just out of curiosity. Why do you need local backtracing on Android
when there's the debuggerd to handle crashes?
I also needed local backtracing on Android for a profiler and did some
work to work around the need for dl_iterate_phdr. That work is up at:
https://github.com/jrmuizel/libunwind/commit/79c42a7cc4d11c90be28bd8bf7cc4884bf8766ce
However, a coworker of mine tried it out and it didn't work for him.
I've not yet had a chance to debug it.
-Jeff
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