Does orbit support arm64 platform?

[simpzan]

I want to use this tool to analyze arm64 linux and android. I tried to build orbit on arm64 linux, it failed with the following error.

    g++-9: error: unrecognized command line option '-m64’
make[1]: *** [CMakeFiles/cmTC_d5ce4.dir/build.make:66: CMakeFiles/cmTC_d5ce4.dir/testCXXCompiler.cxx.o] Error 1
make[1]: Leaving directory
'/home/xxx/.conan/data/abseil/20220623.0/_/_/build/6eeea3904f53d9f7311f5a5b447089286767e0b4/build/RelWithDebInfo/CMakeFiles/CMakeTmp'

[florian-kuebler]

Hi, thanks for reaching out.
Profiling arm64 linux and android targets are currently not (explicitly) supported, neither do we test building form arm64.

For arm64 linux:
As we are relying mostly on Linux's perf_event_open syscall, many features should work out-of-the box (not tested). However, there are a couple of places where we explicitly assume x86_64 in the code. User-space dynamic instrumentation, disassembly view, frame-pointer-based unwinding, will certainly not work.

For android:
We use android's unwinding library libunwindstack, which does support mixed Java/native callstack unwinding. However, we currently have no code in place, to retrieve Java's symbol information. Also neither dynamic nor manual instrumentation will work on Java code, and we would need to have some custom solution (e.g. using aspectj, or some dynamic analysis technique). There might be also other obstacles I am currently not aware of.

So depending on the needs, it might be not too much effort to get it working. Sophisticated support is for sure quite some work.

We don't have any resources right now, to look into this, but contributions are more then welcome. If needed, I can provide necessary code-pointers to get started.

As an alternative, you might want to consider perfetto, which is explicitly developed for android.

[florian-kuebler]

@beckerhe might now more about the compilation error (where we pass the "-m64").

[beckerhe]

The -m64 flag is probably generated by Conan. How does your Conan profile look like?