Reliably signal coordinator thread on panic during ongoing codegen

Replace the separate AbortCodegenOnDrop guard by integrating this
functionality into OngoingCodegen (or rather, the Coordinator part
of it). This ensures that we send a CodegenAborted message and
wait for workers to finish even if the panic occurs outside
codegen_crate() (e.g. inside join_codegen()).

This requires some minor changes to the handling of CodegenAborted,
as it can now occur when the main thread is LLVMing rather than
Codegenning.

0 files changed, 0 insertions, 0 deletions