From: Willy Tarreau <w@1wt.eu>
To: "Paul E . McKenney" <paulmck@kernel.org>
Cc: Pranith Kumar <bobby.prani@gmail.com>,
Alviro Iskandar Setiawan <alviro.iskandar@gnuweeb.org>,
Ammar Faizi <ammarfaizi2@gnuweeb.org>,
David Laight <David.Laight@ACULAB.COM>,
Mark Brown <broonie@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Shuah Khan <shuah@kernel.org>,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
Willy Tarreau <w@1wt.eu>
Subject: [PATCH 08/17] selftests/nolibc: exit with poweroff on success when getpid() == 1
Date: Tue, 19 Jul 2022 23:44:40 +0200 [thread overview]
Message-ID: <20220719214449.2520-10-w@1wt.eu> (raw)
In-Reply-To: <20220719214449.2520-1-w@1wt.eu>
The idea is to ease automated testing under qemu. If the test succeeds
while running as PID 1, indicating the system was booted with init=/test,
let's just power off so that qemu can exit with a successful code. In
other situations it will exit and provoke a panic, which may be caught
for example with CONFIG_PVPANIC.
Signed-off-by: Willy Tarreau <w@1wt.eu>
---
tools/testing/selftests/nolibc/nolibc-test.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
index ab7c4cbdef9b..5f2173610d03 100644
--- a/tools/testing/selftests/nolibc/nolibc-test.c
+++ b/tools/testing/selftests/nolibc/nolibc-test.c
@@ -626,6 +626,20 @@ int main(int argc, char **argv, char **envp)
}
printf("Total number of errors: %d\n", ret);
+
+ if (getpid() == 1) {
+ /* we're running as init, there's no other process on the
+ * system, thus likely started from a VM for a quick check.
+ * Exiting will provoke a kernel panic that may be reported
+ * as an error by Qemu or the hypervisor, while stopping
+ * cleanly will often be reported as a success. This allows
+ * to use the output of this program for bisecting kernels.
+ */
+ printf("Leaving init with final status: %d\n", !!ret);
+ if (ret == 0)
+ reboot(LINUX_REBOOT_CMD_POWER_OFF);
+ }
+
printf("Exiting with status %d\n", !!ret);
return !!ret;
}
--
2.17.5
next prev parent reply other threads:[~2022-07-19 21:47 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-19 21:44 [PATCH 00/17] nolibc: add preliminary self tests Willy Tarreau
2022-07-19 21:44 ` [PATCH 01/17] tools/nolibc: make argc 32-bit in riscv startup code Willy Tarreau
2022-07-19 21:44 ` [PATCH 02/17] tools/nolibc: fix build warning in sys_mmap() when my_syscall6 is not defined Willy Tarreau
2022-07-19 21:44 ` [PATCH 03/17] tools/nolibc: make sys_mmap() automatically use the right __NR_mmap definition Willy Tarreau
2022-07-19 21:44 ` [PATCH 04/17] selftests/nolibc: add basic infrastructure to ease creation of nolibc tests Willy Tarreau
2022-07-19 21:44 ` [PATCH 05/17] selftests/nolibc: support a test definition format Willy Tarreau
2022-07-19 21:44 ` [PATCH 06/17] selftests/nolibc: implement a few tests for various syscalls Willy Tarreau
2022-07-19 21:44 ` [PATCH 07/17] selftests/nolibc: add a few tests for some libc functions Willy Tarreau
2022-07-19 21:44 ` [PATCH 07/17] selftests/nolibc: add a few tests for some stdlib functions Willy Tarreau
2022-07-19 21:44 ` Willy Tarreau [this message]
2022-07-19 21:44 ` [PATCH 09/17] selftests/nolibc: on x86, support exiting with isa-debug-exit Willy Tarreau
2022-07-19 21:44 ` [PATCH 10/17] selftests/nolibc: recreate and populate /dev and /proc if missing Willy Tarreau
2022-07-19 21:44 ` [PATCH 11/17] selftests/nolibc: condition some tests on /proc existence Willy Tarreau
2022-07-19 21:44 ` [PATCH 12/17] selftests/nolibc: support glibc as well Willy Tarreau
2022-07-19 21:44 ` [PATCH 13/17] selftests/nolibc: add a "kernel" target to build the kernel with the initramfs Willy Tarreau
2022-07-19 21:44 ` [PATCH 14/17] selftests/nolibc: add a "defconfig" target Willy Tarreau
2022-07-19 21:44 ` [PATCH 15/17] selftests/nolibc: add a "run" target to start the kernel in QEMU Willy Tarreau
2022-07-19 21:44 ` [PATCH 16/17] selftests/nolibc: "sysroot" target installs a local copy of the sysroot Willy Tarreau
2022-07-19 21:44 ` [PATCH 17/17] selftests/nolibc: add a "help" target Willy Tarreau
2022-07-19 22:49 ` [PATCH 00/17] nolibc: add preliminary self tests Paul E. McKenney
2022-07-20 3:26 ` Willy Tarreau
2022-07-20 16:03 ` Ammar Faizi
2022-07-20 16:20 ` Willy Tarreau
2022-07-20 17:05 ` Ammar Faizi
2022-07-20 17:14 ` Willy Tarreau
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