Add remote testing support to the lit config.
Executors can be specified at configure time by using the -DLIBCXX_EXECUTOR=""
option. Examples include:
$ cmake <other_flags> -DLIBCXX_EXECUTOR="TimeoutExecutor(30,LocalExecutor())" This runs individual tests with a maximum duration $ cmake <other_flags> -DLIBCXX_EXECUTOR="SSHExecutor('hostname','username')" This runs tests on a remote target, using scp to shuttle binaries to the target, and ssh to invoke commands there. $ cmake <other_flags> -DLIBCXX_EXECUTOR="PrefixExecutor('/path/to/run/script',LocalExecutor())" This assumes the script knows how to copy run the executables passed to it, and allows for the ultimate control. This is useful for running things inside emulators like Valgrind & QEMU.
TODO: This doesn't claim to support ShTest tests yet, that will take a bit more
thought & finagling (I'm still not sure how to orchestrate copy-in for those cases. I've also punted on what to do about tests that read data files. The testsuite has several tests that need to read *.dat files placed next to them, and currently those aren't copied over when using, say, an SSHExecutor. The affected tests are: libc++ :: std/input.output/file.streams/fstreams/filebuf.virtuals/pbackfail.pass.cpp libc++ :: std/input.output/file.streams/fstreams/filebuf.virtuals/underflow.pass.cpp libc++ :: std/input.output/file.streams/fstreams/ifstream.assign/member_swap.pass.cpp libc++ :: std/input.output/file.streams/fstreams/ifstream.assign/move_assign.pass.cpp libc++ :: std/input.output/file.streams/fstreams/ifstream.assign/nonmember_swap.pass.cpp libc++ :: std/input.output/file.streams/fstreams/ifstream.cons/move.pass.cpp libc++ :: std/input.output/file.streams/fstreams/ifstream.cons/pointer.pass.cpp libc++ :: std/input.output/file.streams/fstreams/ifstream.cons/string.pass.cpp libc++ :: std/input.output/file.streams/fstreams/ifstream.members/close.pass.cpp libc++ :: std/input.output/file.streams/fstreams/ifstream.members/open_pointer.pass.cpp libc++ :: std/input.output/file.streams/fstreams/ifstream.members/open_string.pass.cpp libc++ :: std/input.output/file.streams/fstreams/ifstream.members/rdbuf.pass.cpp libc++ :: std/localization/locales/locale.convenience/conversions/conversions.buffer/pbackfail.pass.cpp libc++ :: std/localization/locales/locale.convenience/conversions/conversions.buffer/underflow.pass.cpp
Note: One thing to watch out for when using the SSHExecutor for cross-testing is
that you'll also want to specify a TargetInfo object (so that the host's features aren't used for available-features checks and flags setup).