PING [PATCH v5 0/2] IBM zSystems: Improve storing asan frame_pc

[Ilya Leoshkevich via Gcc-patches]

On Tue, 2022-09-27 at 02:23 +0200, Ilya Leoshkevich wrote:
> Hi,
> 
> This is a resend of v4 with slightly adjusted commit messages:
> 
> v1: https://gcc.gnu.org/pipermail/gcc-patches/2019-July/525016.html
> v2: https://gcc.gnu.org/pipermail/gcc-patches/2019-July/525069.html
> v3: https://gcc.gnu.org/pipermail/gcc-patches/2020-June/548338.html
> v4: https://gcc.gnu.org/pipermail/gcc-patches/2020-July/549252.html
> 
> It still survives the bootstrap and the regtest on x86_64-redhat-
> linux,
> s390x-redhat-linux and ppc64le-redhat-linux.  It also fixes [1].
> 
> I also tried the approach with moving .LASANPC closer to the function
> label and using FUNCTION_BOUNDARY instead of introducing
> CODE_LABEL_BOUNDARY, but the problem there is that it's hard to catch
> the moment where the function label is written.  Architectures can do
> it by calling ASM_OUTPUT_LABEL() or assemble_name() in
> ASM_DECLARE_FUNCTION_NAME(), ASM_OUTPUT_FUNCTION_LABEL() or
> TARGET_ASM_FUNCTION_PROLOGUE().  epiphany_start_function() does that
> twice, but passes the same decl to both calls.  Note that simply
> moving asan_function_start() to final_start_function_1() is not
> enough,
> since an architecture can write something after the function label.
> This all means that for this approach to work, all the architectures
> need to be adjusted, which looks like an overkill to me.
> 
> Best regards,
> Ilya
> 
> [1] https://gcc.gnu.org/pipermail/gcc-patches/2022-April/593666.html
> 
> 
> Ilya Leoshkevich (2):
>   asan: specify alignment for LASANPC labels
>   IBM zSystems: Define CODE_LABEL_BOUNDARY
> 
>  gcc/asan.cc                                    |  1 +
>  gcc/config/s390/s390.h                         |  3 +++
>  gcc/defaults.h                                 |  5 +++++
>  gcc/doc/tm.texi                                |  4 ++++
>  gcc/doc/tm.texi.in                             |  4 ++++
>  gcc/testsuite/gcc.target/s390/asan-no-gotoff.c | 15 +++++++++++++++
>  6 files changed, 32 insertions(+)
>  create mode 100644 gcc/testsuite/gcc.target/s390/asan-no-gotoff.c
>