On 20/10/23 06:21, Michał Winiarski wrote: > Clang uses a different set of CLI args for coverage, and the output > needs to be processed by a different set of tools. > Update the Makefile and add an example of usage in kunit docs. Great change! It's great not to rely on older versions of GCC for that. I was able to generate coverage reports, but I have a few of things to note: When I ran the kunit.py it generated this warning several times: WARNING: modpost: vmlinux (__llvm_covfun): unexpected non-allocatable section. Did you forget to use "ax"/"aw" in a .S file? Note that for example <linux/init.h> contains section definitions for use in .S files. Maybe it would be great to know why this is happening. Also, the linker consumed a lot of RAM to build the kernel with those additional flags, but maybe this is expected :P. Best Regards, ~Arthur Grillo > > Michał Winiarski (2): > arch: um: Add Clang coverage support > Documentation: kunit: Add clang UML coverage example > > Documentation/dev-tools/kunit/running_tips.rst | 11 +++++++++++ > arch/um/Makefile-skas | 5 +++++ > 2 files changed, 16 insertions(+) >
