[all-commits] [llvm/llvm-project] 266bb7: LanguageRuntime for 0th frame unwind, simplify get...

[Jason Molenda via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 266bb78f7d133a344992c5bfca61ef11ee152cb0
      https://github.com/llvm/llvm-project/commit/266bb78f7d133a344992c5bfca61ef11ee152cb0
  Author: Jason Molenda <jason at molenda.com>
  Date:   2021-03-03 (Wed, 03 Mar 2021)

  Changed paths:
    M lldb/include/lldb/Target/LanguageRuntime.h
    M lldb/include/lldb/Target/RegisterContext.h
    M lldb/include/lldb/Target/RegisterContextUnwind.h
    M lldb/include/lldb/Target/StackFrame.h
    M lldb/source/Target/LanguageRuntime.cpp
    M lldb/source/Target/RegisterContext.cpp
    M lldb/source/Target/RegisterContextUnwind.cpp
    M lldb/source/Target/StackFrame.cpp
    M lldb/source/Target/StackFrameList.cpp
    M lldb/source/Target/UnwindLLDB.cpp

  Log Message:
  -----------
  LanguageRuntime for 0th frame unwind, simplify getting pc-for-symbolication

Add calls into LanguageRuntime when finding the unwind method to
use out of the 0th (currently executing) stack frame.

Allow for the LanguageRuntimes to indicate if this stack frames
should be treated like a zeroth-frame -- symbolication should be
done based on the saved pc address, not decremented like normal ABI
function calls.

Add methods to RegisterContext and StackFrame to get a pc value
suitable for symbolication, to reduce the number of places in lldb
where we decrement the saved pc values before symbolication.

<rdar://problem/70398009>
Differential Revision: https://reviews.llvm.org/D97644