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Re: libffi trunk: new regressions on x86_64-linux-gnu, some test failures left on i686-linux-gnu

From: Anthony Green <green at moxielogic dot com>
To: Matthias Klose <doko at debian dot org>
Cc: "libffi-discuss at sourceware dot org" <libffi-discuss at sourceware dot org>, "H.J. Lu" <hjl dot tools at gmail dot com>
Date: Sat, 5 May 2018 09:51:55 -0400
Subject: Re: libffi trunk: new regressions on x86_64-linux-gnu, some test failures left on i686-linux-gnu
References: <ee7a874b-d45e-baf4-0d0d-2a40ad1fa1f4@debian.org>

These failures are showing up because we're testing the microsoft ABI now.

This looks like a bug in GCC.  It's not returning small structures with
floating point values in the right registers when following the Microsoft
ABI.  I'm going to figure out how to 'xfail' those tests and open a bug
against GCC.   Clang appears to get it right.

AG


On Sat, May 5, 2018 at 9:39 AM, Matthias Klose <doko@debian.org> wrote:

> https://buildd.debian.org/status/package.php?p=libffi&suite=experimental
>
> trunk libffi testing from 2018-05-02, up to d3c54cf3a2b2bb2e889173b6a0a959
> 517b42c47f
>
> shows
>
>  - passing all tests on powerpc64-linux-gnu
>
>  - some regressions on x86_64-linux
>
> Running ../../testsuite/libffi.bhaible/bhaible.exp ...
> FAIL: libffi.bhaible/test-call.c -W -Wall -Wno-psabi -DDGTEST=55
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O0 -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-call.c -W -Wall -Wno-psabi -DDGTEST=55
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-call.c -W -Wall -Wno-psabi -DDGTEST=55
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -Os -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-call.c -W -Wall -Wno-psabi -DDGTEST=55
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -fomit-frame-pointer -DABI_NUM=FFI_WIN64
> -DABI_ATTR=__MSABI__ execution test
> FAIL: libffi.bhaible/test-call.c -W -Wall -Wno-psabi -DDGTEST=56
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O0 -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-call.c -W -Wall -Wno-psabi -DDGTEST=56
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-call.c -W -Wall -Wno-psabi -DDGTEST=56
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -Os -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-call.c -W -Wall -Wno-psabi -DDGTEST=56
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -fomit-frame-pointer -DABI_NUM=FFI_WIN64
> -DABI_ATTR=__MSABI__ execution test
> FAIL: libffi.bhaible/test-call.c -W -Wall -Wno-psabi -DDGTEST=57
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O0 -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-call.c -W -Wall -Wno-psabi -DDGTEST=57
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-call.c -W -Wall -Wno-psabi -DDGTEST=57
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -Os -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-call.c -W -Wall -Wno-psabi -DDGTEST=57
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -fomit-frame-pointer -DABI_NUM=FFI_WIN64
> -DABI_ATTR=__MSABI__ execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=54
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O0 -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=54
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=54
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -Os -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=54
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -fomit-frame-pointer -DABI_NUM=FFI_WIN64
> -DABI_ATTR=__MSABI__ execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=55
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O0 -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=55
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=55
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -Os -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=55
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -fomit-frame-pointer -DABI_NUM=FFI_WIN64
> -DABI_ATTR=__MSABI__ execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=56
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O0 -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=56
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=56
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -Os -DABI_NUM=FFI_WIN64 -DABI_ATTR=__MSABI__ execution
> test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=56
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -fomit-frame-pointer -DABI_NUM=FFI_WIN64
> -DABI_ATTR=__MSABI__ execution test
>
>
>  - improved results on i686-linux-gnu
>
> Running ../../testsuite/libffi.bhaible/bhaible.exp ...
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=46
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -Os -DABI_NUM=FFI_STDCALL -DABI_ATTR=__STDCALL__
> execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=48
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -Os -DABI_NUM=FFI_STDCALL -DABI_ATTR=__STDCALL__
> execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=49
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -Os -DABI_NUM=FFI_STDCALL -DABI_ATTR=__STDCALL__
> execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=51
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -Os -DABI_NUM=FFI_STDCALL -DABI_ATTR=__STDCALL__
> execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=53
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -DABI_NUM=FFI_STDCALL -DABI_ATTR=__STDCALL__
> execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=53
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -Os -DABI_NUM=FFI_STDCALL -DABI_ATTR=__STDCALL__
> execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=53
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -fomit-frame-pointer -DABI_NUM=FFI_STDCALL
> -DABI_ATTR=__STDCALL__ execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=60
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -DABI_NUM=FFI_STDCALL -DABI_ATTR=__STDCALL__
> execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=60
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -fomit-frame-pointer -DABI_NUM=FFI_STDCALL
> -DABI_ATTR=__STDCALL__ execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=61
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -Os -DABI_NUM=FFI_STDCALL -DABI_ATTR=__STDCALL__
> execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=64
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -DABI_NUM=FFI_STDCALL -DABI_ATTR=__STDCALL__
> execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=64
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -O2 -fomit-frame-pointer -DABI_NUM=FFI_STDCALL
> -DABI_ATTR=__STDCALL__ execution test
> FAIL: libffi.bhaible/test-callback.c -W -Wall -Wno-psabi -DDGTEST=65
> -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable
> -Wno-uninitialized -Os -DABI_NUM=FFI_STDCALL -DABI_ATTR=__STDCALL__
> execution test
>

Follow-Ups:
- Re: libffi trunk: new regressions on x86_64-linux-gnu, some test failures left on i686-linux-gnu
  - From: Kaz Kylheku (libffi)

References:
- libffi trunk: new regressions on x86_64-linux-gnu, some test failures left on i686-linux-gnu
  - From: Matthias Klose

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