Native Code coverage with android soong build system

I'm trying to generate code coverage report for my native components with AOSP source code using soong build system.

I have extended aosp vhal but unit test cases are same as in below link. http://androidxref.com/8.1.0_r33/xref/hardware/interfaces/automotive/vehicle/2.0/default/tests/

Tried adding below to cc_test, cc_binary in Android.bp

native_coverage : true,

    cflags: [
         "-g",
         "-O0",
         "-fprofile-arcs",
         "-ftest-coverage",
    ],

     ldflags : [
        "-fprofile-arcs",
        "-ftest-coverage",
    ],

Native binary unit-tests-coverage is generated in out/target/product but I can't find gcno intermediates for this.

Running below command gives me *.gcda files for each test files.

adb shell \
    GCOV_PREFIX=/data/local/tmp \
    GCOV_PREFIX_STRIP=`echo $ANDROID_BUILD_TOP | grep -o / | wc -l` \
    /data/local/tmp/unit-tests-coverage

I have tried below links but not sure how to proceed :(

http://logan.tw/posts/2015/04/28/check-code-coverage-with-clang-and-lcov/ https://android.googlesource.com/platform/bionic.git/+/master-soong https://android.googlesource.com/platform/build/soong/+/581341d%5E%21/ https://android.googlesource.com/platform/external/e2fsprogs/+/fedfb27%5E%21/ https://android.googlesource.com/platform/development/+/master/scripts/acov#23 http://androidxref.com/9.0.0_r3/xref/bionic/README.md#293

I'm not sure if google's vts framework can be used here to generate native code coverage. https://codelabs.developers.google.com/codelabs/android-vts-8/#6

"gcnodir" is generated but not sure how to make use of it. /coverage/data/nativetest64/vehicle-unit-tests-coverage/unit-tests-coverage.gcnodir

from Native Code coverage with android soong build system