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[PATCH v8 13/21] main: keep rcu_atfork callback enabled for qtest
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From: |
Bulekov, Alexander |
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Subject: |
[PATCH v8 13/21] main: keep rcu_atfork callback enabled for qtest |
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Date: |
Wed, 29 Jan 2020 05:34:22 +0000 |
The qtest-based fuzzer makes use of forking to reset-state between
tests. Keep the callback enabled, so the call_rcu thread gets created
within the child process.
Signed-off-by: Alexander Bulekov <address@hidden>
---
vl.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/vl.c b/vl.c
index bb77935f04..cf8e2d3ebb 100644
--- a/vl.c
+++ b/vl.c
@@ -3794,7 +3794,14 @@ void qemu_init(int argc, char **argv, char **envp)
set_memory_options(&ram_slots, &maxram_size, machine_class);
os_daemonize();
- rcu_disable_atfork();
+
+ /*
+ * If QTest is enabled, keep the rcu_atfork enabled, since system processes
+ * may be forked testing purposes (e.g. fork-server based fuzzing)
+ */
+ if (!qtest_enabled()) {
+ rcu_disable_atfork();
+ }
if (pid_file && !qemu_write_pidfile(pid_file, &err)) {
error_reportf_err(err, "cannot create PID file: ");
--
2.23.0
- Re: [PATCH v8 01/21] softmmu: split off vl.c:main() into main.c, (continued)
- [PATCH v8 02/21] module: check module wasn't already initialized, Bulekov, Alexander, 2020/01/29
- [PATCH v8 03/21] fuzz: add FUZZ_TARGET module type, Bulekov, Alexander, 2020/01/29
- [PATCH v8 04/21] qtest: add qtest_server_send abstraction, Bulekov, Alexander, 2020/01/29
- [PATCH v8 05/21] libqtest: add a layer of abstraction to send/recv, Bulekov, Alexander, 2020/01/29
- [PATCH v8 06/21] libqtest: make bufwrite rely on the TransportOps, Bulekov, Alexander, 2020/01/29
- [PATCH v8 07/21] qtest: add in-process incoming command handler, Bulekov, Alexander, 2020/01/29
- [PATCH v8 08/21] libqos: rename i2c_send and i2c_recv, Bulekov, Alexander, 2020/01/29
- [PATCH v8 09/21] libqos: split qos-test and libqos makefile vars, Bulekov, Alexander, 2020/01/29
- [PATCH v8 12/21] exec: keep ram block across fork when using qtest, Bulekov, Alexander, 2020/01/29
- [PATCH v8 13/21] main: keep rcu_atfork callback enabled for qtest,
Bulekov, Alexander <=
[PATCH v8 11/21] fuzz: add fuzzer skeleton, Bulekov, Alexander, 2020/01/29
[PATCH v8 10/21] libqos: move useful qos-test funcs to qos_external, Bulekov, Alexander, 2020/01/29
[PATCH v8 14/21] fuzz: support for fork-based fuzzing., Bulekov, Alexander, 2020/01/29
[PATCH v8 16/21] fuzz: add target/fuzz makefile rules, Bulekov, Alexander, 2020/01/29
[PATCH v8 17/21] fuzz: add configure flag --enable-fuzzing, Bulekov, Alexander, 2020/01/29