tree 6805300dab02f8e42d7d6a97678e2425cb350fff
parent 32672b877dc1e05bc4489f2f4598f5472bc60576
author Lang Hames <lhames@gmail.com> 1585780108 -0700
committer Lang Hames <lhames@gmail.com> 1585793528 -0700

[ORC] Export __cxa_atexit from the main JITDylib in LLJIT.

Failure to export __cxa_atexit can lead to an attempt to import a definition
from the process itself (if __cxa_atexit is referenced from another JITDylib),
but the process definition will clash with the existing non-exported definition
to produce an unexpected DuplicateDefinitionError.

This patch fixes the immediate issue by exporting __cxa_atexit. It also fixes a
bug where atexit functions in other JITDylibs were not being run by adding a
copy of run_atexits_helper to every JITDylib.

A follow up patch will deal with the bug where definition generators are called
despite a non-exported definition being present.