mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-15 22:56:32 +00:00
e7aed23d32
Functions with `musttail` calls can't be roots because we can't instrument their `ret` to release the context. This patch tags their `CtxRoot` field in their `FunctionData`. In compiler-rt we then know not to allow such functions become roots, and also not confuse `CtxRoot == 0x1` with there being a context root. Currently we also lose the context tree under such cases. We can, in a subsequent patch, have the root detector search past these functions.