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[Bug 1905651] Re: Tests cannot call g_error
From: |
Thomas Huth |
Subject: |
[Bug 1905651] Re: Tests cannot call g_error |
Date: |
Mon, 10 May 2021 04:43:27 -0000 |
The QEMU project is currently moving its bug tracking to another system.
For this we need to know which bugs are still valid and which could be
closed already. Thus we are setting the bug state to "Incomplete" now.
If the bug has already been fixed in the latest upstream version of QEMU,
then please close this ticket as "Fix released".
If it is not fixed yet and you think that this bug report here is still
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Thank you and sorry for the inconvenience.
** Changed in: qemu
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1905651
Title:
Tests cannot call g_error
Status in QEMU:
Incomplete
Bug description:
I stumbled on this writing a new test, using tests/qtest/e1000e-test.c
as a template.
g_error() causes SIGTRAP, not SIGABRT, and thus the abort handler doesn't get
run.
This in turn means qemu is not killed, which hangs the test because the
tap-driver.pl script hangs waiting for more input.
There are a few tests that call g_error().
The SIGABRT handler explicitly kills qemu, e.g.:
qos-test.c:
qtest_add_abrt_handler(kill_qemu_hook_func, s);
ref:
https://git.qemu.org/?p=qemu.git;a=blob;f=tests/qtest/libqtest.c;h=e49f3a1e45f4cd96279241fdb2bbe231029ab922;hb=HEAD#l272
But not unexpectedly there's no such handler for SIGTRAP.
Apply this patch to trigger a repro:
diff --git a/tests/qtest/e1000e-test.c b/tests/qtest/e1000e-test.c
index fc226fdfeb..e83ace1b5c 100644
--- a/tests/qtest/e1000e-test.c
+++ b/tests/qtest/e1000e-test.c
@@ -87,6 +87,9 @@ static void e1000e_send_verify(QE1000E *d, int
*test_sockets, QGuestAllocator *a
/* Wait for TX WB interrupt */
e1000e_wait_isr(d, E1000E_TX0_MSG_ID);
+ g_message("Test g_error hang ...");
+ g_error("Pretend something timed out");
+
/* Check DD bit */
g_assert_cmphex(le32_to_cpu(descr.upper.data) & dsta_dd, ==, dsta_dd);
Then:
configure
make
make check-qtest-i386
check-qtest-i386 will take awhile. To repro faster:
$ grep qtest-i386/qos-test Makefile.mtest
.test.name.229 := qtest-i386/qos-test
$ make run-test-229
Running test qtest-i386/qos-test
** Message: 18:40:49.821: Test g_error hang ...
** (tests/qtest/qos-test:3820728): ERROR **: 18:40:49.821: Pretend something
timed out
ERROR qtest-i386/qos-test - Bail out! FATAL-ERROR: Pretend something timed out
At this point things are hung because tap-driver.pl is still waiting
for input because qemu is still running.
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