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coroutine: Assert that no locks are held on termination

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A coroutine that takes a lock must also release it again. If the
coroutine terminates without having released all its locks, it's buggy
and we'll probably run into a deadlock sooner or later. Make sure that
we don't get such cases.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf 2016-08-11 17:51:59 +02:00
parent 0e438cdc93
commit 1b7f01d966
3 changed files with 13 additions and 0 deletions
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include/qemu/coroutine_int.h
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@ -39,6 +39,7 @@ struct Coroutine {
void *entry_arg;
Coroutine *caller;
QSLIST_ENTRY(Coroutine) pool_next;
size_t locks_held;
/* Coroutines that should be woken up when we yield or terminate */
QSIMPLEQ_HEAD(, Coroutine) co_queue_wakeup;