This command is only used to test OOB functionality. It should not be used for any other purposes.
Signed-off-by: Peter Xu <pet...@redhat.com> --- qapi-schema.json | 18 ++++++++++++++++++ qmp.c | 16 ++++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/qapi-schema.json b/qapi-schema.json index 9d2625b6b3..5bd59bd266 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -3256,3 +3256,21 @@ ## { 'event': 'REQUEST_DROPPED' , 'data': { 'id': 'any', 'reason': 'RequestDropReason' } } + +## +# @x-oob-test: +# +# Test OOB functionality. When send this command with lock=true, +# it'll try to hang the dispatcher. When send it with lock=false, +# it'll try to notify the locked thread to continue. Note: it should +# only be used by QMP test program rather than anything else. +# +# Since: 2.12 +# +# Example: +# +# { "execute": "x-oob-test", +# "arguments": { "lock": true } } +## +{ 'command': 'x-oob-test', 'data' : { 'lock': 'bool' }, + 'allow-oob': true } diff --git a/qmp.c b/qmp.c index e8c303116a..ca2968aad2 100644 --- a/qmp.c +++ b/qmp.c @@ -722,3 +722,19 @@ MemoryInfo *qmp_query_memory_size_summary(Error **errp) return mem_info; } + +static QemuSemaphore x_oob_test_sem; + +static void __attribute__((constructor)) x_oob_test_init(void) +{ + qemu_sem_init(&x_oob_test_sem, 0); +} + +void qmp_x_oob_test(bool lock, Error **errp) +{ + if (lock) { + qemu_sem_wait(&x_oob_test_sem); + } else { + qemu_sem_post(&x_oob_test_sem); + } +} -- 2.13.6