[PATCH] D97694: [lli] Test debug support in RuntimeDyld with built-in functions

[Stefan Gränitz via Phabricator via llvm-commits]

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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 <https://reviews.llvm.org/D97335> has landed.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D97694

Files:
  llvm/test/ExecutionEngine/OrcLazy/debug-descriptor-elf-minimal.ll
  llvm/test/ExecutionEngine/OrcLazy/debug-objects-elf-minimal.ll
  llvm/tools/lli/CMakeLists.txt
  llvm/tools/lli/ExecutionUtils.cpp
  llvm/tools/lli/ExecutionUtils.h
  llvm/tools/lli/lli.cpp

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