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Re: [PATCH] .travis.yml: skip ppc64abi32-linux-user with plugins
From: |
Philippe Mathieu-Daudé |
Subject: |
Re: [PATCH] .travis.yml: skip ppc64abi32-linux-user with plugins |
Date: |
Tue, 14 Jul 2020 21:29:39 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 |
On 7/14/20 7:55 PM, Alex Bennée wrote:
> We actually see failures on threadcount running without plugins:
>
> retry.py -n 1000 -c -- \
> ./ppc64abi32-linux-user/qemu-ppc64abi32 \
> ./tests/tcg/ppc64abi32-linux-user/threadcount
>
> which reports:
>
> 0: 978 times (97.80%), avg time 0.270 (0.01 varience/0.08 deviation)
> -6: 21 times (2.10%), avg time 0.336 (0.01 varience/0.12 deviation)
> -11: 1 times (0.10%), avg time 0.502 (0.00 varience/0.00 deviation)
> Ran command 1000 times, 978 passes
>
> But when running with plugins we hit the failure a lot more often:
>
> 0: 91 times (91.00%), avg time 0.302 (0.04 varience/0.19 deviation)
> -11: 9 times (9.00%), avg time 0.558 (0.01 varience/0.11 deviation)
> Ran command 100 times, 91 passes
>
> The crash occurs in guest code which is the same in both pass and fail
> cases. However we see various messages reported on the console about
> corrupted memory lists which seems to imply the guest memory allocation
> is corrupted. This lines up with the seg fault being in the guest
> __libc_free function. So we think this is a guest bug which is
> exacerbated by various modes of translation. If anyone has access to
> real hardware to soak test the test case we could prove this properly.
>
> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
> Cc: David Gibson <david@gibson.dropbear.id.au>
> Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
> .travis.yml | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/.travis.yml b/.travis.yml
> index ab429500fc..6695c0620f 100644
> --- a/.travis.yml
> +++ b/.travis.yml
> @@ -350,9 +350,10 @@ jobs:
> # Run check-tcg against linux-user (with plugins)
> # we skip sparc64-linux-user until it has been fixed somewhat
> # we skip cris-linux-user as it doesn't use the common run loop
> + # we skip ppc64abi32-linux-user as it seems to have a broken libc
> - name: "GCC plugins check-tcg (user)"
> env:
> - - CONFIG="--disable-system --enable-plugins --enable-debug-tcg
> --target-list-exclude=sparc64-linux-user,cris-linux-user"
> + - CONFIG="--disable-system --enable-plugins --enable-debug-tcg
> --target-list-exclude=sparc64-linux-user,cris-linux-user,ppc64abi32-linux-user"
> - TEST_BUILD_CMD="make build-tcg"
> - TEST_CMD="make check-tcg"
> - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-debug-tcg"
>