[all-commits] [llvm/llvm-project] 883b0d: [lldb][AArch64] Add UnpackTagsFromCoreFileSegment ...

[David Spickett via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 883b0d5b7f873a7d6f8c8ee13c7f6174a2a79a50
      https://github.com/llvm/llvm-project/commit/883b0d5b7f873a7d6f8c8ee13c7f6174a2a79a50
  Author: David Spickett <david.spickett at linaro.org>
  Date:   2022-07-25 (Mon, 25 Jul 2022)

  Changed paths:
    M lldb/include/lldb/Target/MemoryTagManager.h
    M lldb/source/Plugins/Process/Utility/MemoryTagManagerAArch64MTE.cpp
    M lldb/source/Plugins/Process/Utility/MemoryTagManagerAArch64MTE.h
    M lldb/unittests/Process/Utility/MemoryTagManagerAArch64MTETest.cpp

  Log Message:
  -----------
  [lldb][AArch64] Add UnpackTagsFromCoreFileSegment to MemoryTagManager

This is the first part of support for reading MTE tags from Linux
core files. The format is documented here:
https://www.kernel.org/doc/html/latest/arm64/memory-tagging-extension.html#core-dump-support

This patch adds a method to unpack from the format the core
file uses, which is different to the one chosen for GDB packets.

MemoryTagManagerAArch64MTE is not tied one OS so another OS
might choose a different format in future. However, infrastructure
to handle that would go untested until then so I've chosen not to
attempt to handle that.

Reviewed By: omjavaid

Differential Revision: https://reviews.llvm.org/D129487