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We have an exploding complexity problem in the testing so lets just
move the more involved plugins into contrib. tests/plugins still exist
for the basic plugins that exercise the API. We restore the old
pre-meson style Makefile for contrib as it also doubles as a guide for
out-of-tree plugin builds.
While we are at it add some examples to the documentation and a
specific plugins build target.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200909112742.25730-11-alex.bennee@linaro.org>
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When we make changes to the TCG we sometimes cause regressions that
are deep into the execution cycle of the guest. Debugging this often
requires comparing large volumes of trace information to figure out
where behaviour has diverged.
The lockstep plugin utilises a shared socket so two QEMU's running
with the plugin will write their current execution position and wait
to receive the position of their partner process. When execution
diverges the plugins output where they were and the previous few
blocks before unloading themselves and letting execution continue.
Originally I planned for this to be most useful with -icount but it
turns out you can get divergence pretty quickly due to asynchronous
qemu_cpu_kick_rr_cpus() events causing one side to eventually run into
a short block a few cycles before the other side. For this reason I've
added a bit of tracking and I think the divergence reporting could be
finessed to report only if we really start to diverge in execution.
An example run would be:
qemu-system-sparc -monitor none -parallel none -net none \
-M SS-20 -m 256 -kernel day11/zImage.elf \
-plugin ./tests/plugin/liblockstep.so,arg=lockstep-sparc.sock \
-d plugin,nochain
with an identical command in another window in the same working
directory.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Robert Foley <robert.foley@linaro.org>
Tested-by: Robert Foley <robert.foley@linaro.org>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20200610155509.12850-3-alex.bennee@linaro.org>
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If you jump back and forth between branches while developing plugins
you end up debugging failures caused by plugins left in the build
directory. Fix this by basing plugins on the source tree instead.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200615141922.18829-2-alex.bennee@linaro.org>
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When combined with heavy plugins we occasionally hit the timeouts.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200225124710.14152-17-alex.bennee@linaro.org>
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If CONFIG_PLUGINS is enabled then lets enable testing for all our TCG
targets. This is a simple smoke test that ensure we don't crash or
otherwise barf out by running each plugin against each test.
There is a minor knock on effect for additional runners which need
specialised QEMU_OPTS which will also need to declare a plugin version
of the runner. If this gets onerous we might need to add another
helper.
Checking the results of the plugins is left for a later exercise.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
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Otherwise clever expanders like the plugins test get unstuck.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
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Since moving where the tests are run the path to config-host.mak has
been wrong. This doesn't affect much but things like the time fallback
for CONFIG_DEBUG_TCG and will also get in the way of checking for
PLUGINS support.
Fixes: fc76c56d3f4
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
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This is a generic floating point multiply and accumulate test for
single precision floating point values. I've split of the common float
functions into a helper library so additional tests can use the same
common code.
As I don't have references for all architectures I've allowed some
flexibility for tests to pass without reference files. They can be
added as we get collect them.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
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These were missed in the recent de-tangling so have been updated to be
more actuate. I've also built up ARM_TESTS in a manner similar to
AARCH64_TESTS for better consistency.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
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Avoid the repeated inclusions of config-target.mak, which have
risks of namespace pollution, and instead build minimal configuration
files in a configuration script. The same configuration files can
also be included in Makefile and Makefile.qemu
[AJB 10/09/19]
In the original PR this had inadvertently enabled tests
for ppc64abi32. However as the rest of the multiarch tests work rather
than disabling the otherwise correctly functioning build I've just
skipped the failing linux-test test. For some reason I can't debug it
with TCG so I'm leaving that to the PPC maintainers to look at.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20190807143523.15917-4-pbonzini@redhat.com>
[AJB: s/docker/container/, rm last bits from configure, ppc6432abi hack]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Cc: Richard Henderson <rth@twiddle.net>
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Rename Makefile.probe to Makefile.prereqs and make it actually
define rules for the tests.
Rename Makefile to Makefile.target, since it is not a toplevel
makefile.
Rename Makefile.include to Makefile.qemu and disentangle it
from the QEMU Makefile.target, so that it is invoked recursively
by tests/Makefile.include. Tests are now placed in
tests/tcg/$(TARGET).
Drop the usage of TARGET_BASE_ARCH, which is ignored by everything except
x86_64 and aarch64. Fix x86 tests by using -cpu max and, while
at it, standardize on QEMU_OPTS for aarch64 tests too.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20190807143523.15917-3-pbonzini@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
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