In the dm163-test and stm32l4x5_usart-test, a couple of subtests are
missing the qtest_quit() call.  The effect of this is that on hosts
other than Linux and FreeBSD the test will timeout after executing
all the tests:

242/845 qemu:qtest+qtest-arm / qtest-arm/dm163-test                               TIMEOUT         60.04s   3 subtests passed
100/845 qemu:qtest+qtest-arm / qtest-arm/stm32l4x5_usart-test                     TIMEOUT        600.02s   5 subtests passed

This happens because the qemu-system-arm binary which the test
starts does not exit, and because it shares the stdout with the
test binary, the overall meson test harness thinks the test is
still running. On Linux and FreeBSD we have an extra safety net
set up in qtest_spawn_qemu() which kills off any QEMU binary that
ends up without a parent. This is intended for the case where
QEMU crashed and didn't respond to a SIGTERM or polite request
to quit, but it also sidestepped the problem in this case.
However, OpenBSD doesn't have a PDEATHSIG equivalent, so we
see the timeouts when running a 'make vm-build-openbsd' run.

Add the missing qtest_quit() calls.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
Many thanks to Dan Berrangé for diagnosing the cause of this hang...
Dan also suggested on IRC that we should support g_autoptr for
the QTestState, so you don't need to manually qtest_quit(). But
for the immediate fix, I just add the missing calls.
---
 tests/qtest/dm163-test.c           | 2 ++
 tests/qtest/stm32l4x5_usart-test.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/tests/qtest/dm163-test.c b/tests/qtest/dm163-test.c
index 3161c9208d8..4c8e654af29 100644
--- a/tests/qtest/dm163-test.c
+++ b/tests/qtest/dm163-test.c
@@ -182,6 +182,8 @@ static void test_dm163_gpio_connection(void)
     g_assert_false(qtest_get_irq(qts, LAT_B));
     g_assert_false(qtest_get_irq(qts, SELBK));
     g_assert_false(qtest_get_irq(qts, RST_B));
+
+    qtest_quit(qts);
 }
 
 int main(int argc, char **argv)
diff --git a/tests/qtest/stm32l4x5_usart-test.c b/tests/qtest/stm32l4x5_usart-test.c
index 89025182331..c175ff3064f 100644
--- a/tests/qtest/stm32l4x5_usart-test.c
+++ b/tests/qtest/stm32l4x5_usart-test.c
@@ -202,6 +202,8 @@ static void test_write_read(void)
     qtest_writel(qts, USART1_BASE_ADDR + A_TDR, 0xFFFFFFFF);
     const uint32_t tdr = qtest_readl(qts, USART1_BASE_ADDR + A_TDR);
     g_assert_cmpuint(tdr, ==, 0x000001FF);
+
+    qtest_quit(qts);
 }
 
 static void test_receive_char(void)
-- 
2.34.1

On Thu, Sep 05, 2024 at 05:55:53PM +0100, Peter Maydell wrote:
> In the dm163-test and stm32l4x5_usart-test, a couple of subtests are
> missing the qtest_quit() call.  The effect of this is that on hosts
> other than Linux and FreeBSD the test will timeout after executing
> all the tests:
> 
> 242/845 qemu:qtest+qtest-arm / qtest-arm/dm163-test                               TIMEOUT         60.04s   3 subtests passed
> 100/845 qemu:qtest+qtest-arm / qtest-arm/stm32l4x5_usart-test                     TIMEOUT        600.02s   5 subtests passed
> 
> This happens because the qemu-system-arm binary which the test
> starts does not exit, and because it shares the stdout with the
> test binary, the overall meson test harness thinks the test is
> still running. On Linux and FreeBSD we have an extra safety net
> set up in qtest_spawn_qemu() which kills off any QEMU binary that
> ends up without a parent. This is intended for the case where
> QEMU crashed and didn't respond to a SIGTERM or polite request
> to quit, but it also sidestepped the problem in this case.
> However, OpenBSD doesn't have a PDEATHSIG equivalent, so we
> see the timeouts when running a 'make vm-build-openbsd' run.
> 
> Add the missing qtest_quit() calls.
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
> Many thanks to Dan Berrangé for diagnosing the cause of this hang...
> Dan also suggested on IRC that we should support g_autoptr for
> the QTestState, so you don't need to manually qtest_quit(). But
> for the immediate fix, I just add the missing calls.
> ---
>  tests/qtest/dm163-test.c           | 2 ++
>  tests/qtest/stm32l4x5_usart-test.c | 2 ++
>  2 files changed, 4 insertions(+)

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>


With regards,
Daniel
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