Re: [PATCH 0/4] gdb/aarch64: record/replay support for AArch64

[Luis <luis.machado.foss@gmail.com>]

On 20/04/2026 22:52, Ezra.Sitorus@arm.com wrote:
> From: Ezra Sitorus <ezra.sitorus@arm.com>
> 
> This patch series enables record/replay for the following AArch64
> features:
> * FEAT_LRCPC3 (+rcpc3)
> * FEAT_CSSC (+cssc)
> * FEAT_RPRFM (+rprfm)
> * FEAT_LSE128 (+lse128)
> 
> These were tested either with QEMU or Shrinkwrap. In both cases, I seem
> to have test failures that are not related to my patches (gdb.threads,
> gdb.mi tests for example). In these cases, is it fair to ignore these?
> Or is there some underlying issue I've missed?

That's common. You'll also spot hardware watchpoint behavior differences 
between QEMU and hardware/FM.

As long as things don´t regress overall, it should be fine to ignore the 
flaky tests. You just need to know what they are, so that takes a bit of 
time to get familiar.

> 
> In addition, whenever I used QEMU, I disabled gcs because it seems to
> cause test failures - address/memory accesses seem to always cause a
> fault. Am I doing something wrong?

I wouldn´t expect that to happen, so there might be issues there.

Out of curiosity, as people use more and more LLVM, have you tried with 
tests against LLVM to make sure they pass?

> 
> Ezra
> 
> Ezra Sitorus (4):
>    gdb/aarch64: record/replay support for LRCPC3
>    gdb/aarch64: Test record/replay support for CSSC
>    gdb/aarch64: record/replay support for RPRFM and PRFM (reg)
>    gdb/aarch64: record/replay support for LSE128
> 
>   gdb/aarch64-tdep.c                           | 105 ++++++
>   gdb/testsuite/gdb.reverse/aarch64-cssc.c     | 113 +++++++
>   gdb/testsuite/gdb.reverse/aarch64-cssc.exp   | 141 ++++++++
>   gdb/testsuite/gdb.reverse/aarch64-lrcpc3.c   | 319 +++++++++++++++++++
>   gdb/testsuite/gdb.reverse/aarch64-lrcpc3.exp | 203 ++++++++++++
>   gdb/testsuite/gdb.reverse/aarch64-lse128.c   | 139 ++++++++
>   gdb/testsuite/gdb.reverse/aarch64-lse128.exp | 138 ++++++++
>   gdb/testsuite/lib/gdb.exp                    | 171 ++++++++++
>   8 files changed, 1329 insertions(+)
>   create mode 100644 gdb/testsuite/gdb.reverse/aarch64-cssc.c
>   create mode 100644 gdb/testsuite/gdb.reverse/aarch64-cssc.exp
>   create mode 100644 gdb/testsuite/gdb.reverse/aarch64-lrcpc3.c
>   create mode 100644 gdb/testsuite/gdb.reverse/aarch64-lrcpc3.exp
>   create mode 100644 gdb/testsuite/gdb.reverse/aarch64-lse128.c
>   create mode 100644 gdb/testsuite/gdb.reverse/aarch64-lse128.exp
>