tree e2b0c98f126ae613a7ee2c55ec83f147ce86189f
parent d34d0de3d7acab4617640314ba34daefa2a48b0f
author dhruvachak <Dhruva.Chakrabarti@amd.com> 1707355748 -0800
committer Copybara-Service <copybara-worker@google.com> 1707356143 -0800

[libomptarget] [OMPT] Fixed return address computation for OMPT events. (#80498)

Currently, __builtin_return_address is used to generate the return
address when the callback invoker is created. However, this may result
in the return address pointing to an internal runtime function. This is
not what a tool would typically want. A tool would want to know the
corresponding user code from where the runtime entry point is invoked.

This change adds a thread local variable that is assigned the return
address at the OpenMP runtime entry points. An RAII is used to manage
the modifications to the thread local variable. Whenever the return
address is required for OMPT events, it is read from the thread local
variable.

GitOrigin-RevId: 0d7f232baf6103529844c8977324bd45b21ad923