[Lldb-commits] [PATCH] D101361: [LLDB] Support AArch64/Linux watchpoint on tagged addresses

[Muhammad Omair Javaid via Phabricator via lldb-commits]

omjavaid created this revision.
omjavaid added reviewers: labath, DavidSpickett.
Herald added subscribers: danielkiss, kristof.beyls.
omjavaid requested review of this revision.

AArch64 architecture support virtual addresses with some of the top bits ignored.
These ignored bits can host memory tags or bit masks that can serve to for 
authentication of address integrity. We need to clear away the top ignored bits
from watchpoint address to reliably hit watchpoints as well set watchpoints on 
addresses containing tags or masks in their top bits.

This patch adds support to watch tagged addresses on AArch64/Linux.


https://reviews.llvm.org/D101361

Files:
  lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
  lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.h
  lldb/source/Plugins/Process/Utility/NativeRegisterContextDBReg_arm64.cpp
  lldb/source/Plugins/Process/Utility/NativeRegisterContextDBReg_arm64.h
  lldb/source/Target/Target.cpp
  lldb/test/API/commands/watchpoints/watch_tagged_addr/Makefile
  lldb/test/API/commands/watchpoints/watch_tagged_addr/TestWatchTaggedAddress.py
  lldb/test/API/commands/watchpoints/watch_tagged_addr/main.c

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