tree ed9c10d178ae36f77a8b558864d4af70f9901821
parent b06772ae6fce0b76ccdfc9f1865dd7a719a46df0
author Stefan Gränitz <stefan.graenitz@gmail.com> 1614677875 +0100
committer Copybara-Service <copybara-worker@google.com> 1616055168 -0700

[lli] Test debug support in RuntimeDyld with built-in functions

When lli runs the below IR, it emits in-memory debug objects and registers them with the GDB JIT interface. The tests dump and check the registered information. IR has limited ability to produce complex output in a portable way. Instead the tests rely on built-in functions implemented in lli. They use a new command line flag `-generate=function-name` to instruct the ORC JIT to expose the built-in function with the given name to the JITed program.

`debug-descriptor-elf-minimal.ll` calls `__dump_jit_debug_descriptor()` to reflect the list of debug entries issued for itself after emitting the main module. The output is textual and can be checked straight away.

`debug-objects-elf-minimal.ll` calls `__dump_jit_debug_objects()`, which instructs lli to walk through the list of debug entries and append the encountered in-memory objects to the program output. We feed this output into llvm-dwarfdump to parse the DWARF in each file and dump their structures.

We can do the same for JITLink once D97335 has landed.

Reviewed By: lhames

Differential Revision: https://reviews.llvm.org/D97694

GitOrigin-RevId: f47ff8cff1ede6ee017f4948f25a14e63de18612