[Lldb-commits] [PATCH] D117928: [lldb] Disable tests for x86 that uses write command on XMM registers

Fri Jan 21 15:16:21 PST 2022

ljmf00 added a comment.

In D117928#3262656 <https://reviews.llvm.org/D117928#3262656>, @JDevlieghere wrote:

> Why are we disabling a lldb test because of a bug in GDB?

Because GDB is used on systems that don't implement a `RegisterContext`. I added an inline comment about Darwin and Windows XFAIL, as I'm not sure if this is just Linux specific. See here https://github.com/llvm/llvm-project/blob/main/lldb/source/Plugins/Process/gdb-remote/GDBRemoteRegisterContext.cpp#L296 . Take a look at the issue. You can also reproduce this with `register write`/`register read` right after.

This ended up breaking my testsuite for a long time, since my server has an x86-64-v2 CPU, instead of an x86-64-v3. The buildbots seem to have at least x86-64-v3. As described by the issue I tested this on an AVX capable machine (x86-64-v3) and virtualized an older CPU to reproduce in a clean environment.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D117928/new/

https://reviews.llvm.org/D117928