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kselftest/arm64: Test signal handler state modification in fp-stress

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Currently in fp-stress we test signal delivery to the test threads by
sending SIGUSR2 which simply counts how many signals are delivered. The
test programs now also all have a SIGUSR1 handler which for the threads
doing userspace testing additionally modifies the floating point register
state in the signal handler, verifying that when we return the saved
register state is restored from the signal context as expected. Switch over
to triggering that to validate that we are restoring as expected.

Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20241107-arm64-fp-stress-irritator-v2-6-c4b9622e36ee@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Mark Brown 2024-11-07 01:39:25 +00:00 • committed by Catalin Marinas
parent 7368debf27
commit ead1c35ce3
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/arm64/fp/fp-stress.c
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@ -223,7 +223,7 @@ static void child_output(struct child_data *child, uint32_t events,
static void child_tickle(struct child_data *child)
{
if (child->output_seen && !child->exited)
kill(child->pid, SIGUSR2);
kill(child->pid, SIGUSR1);
}
static void child_stop(struct child_data *child)