llvm-project

484d0408 - [lldb] Fix source line annotations for libsanitizers traces (#154247)

[lldb] Fix source line annotations for libsanitizers traces (#154247) When providing allocation and deallocation traces, the ASan compiler-rt runtime already provides call addresses (`TracePCType::Calls`). On Darwin, system sanitizers (libsanitizers) provides return address. It also discards a few non-user frames at the top of the stack, because these internal libmalloc/libsanitizers stack frames do not provide any value when diagnosing memory errors. Introduce and add handling for `TracePCType::ReturnsNoZerothFrame` to cover this case and enable libsanitizers traces line-level testing. rdar://157596927 --- Commit 1 is a mechanical refactoring to introduce and adopt `TracePCType` enum to replace `pcs_are_call_addresses` bool. It preserve the current behavior: ``` pcs_are_call_addresses: false -> TracePCType::Returns (default) true -> TracePCType::Calls ``` Best reviewed commit by commit.