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-rw-r--r--include/qemu/coroutine.h1
-rw-r--r--util/qemu-coroutine-lock.c3
2 files changed, 4 insertions, 0 deletions
diff --git a/include/qemu/coroutine.h b/include/qemu/coroutine.h
index ac8d4c9cc8..29a20782f0 100644
--- a/include/qemu/coroutine.h
+++ b/include/qemu/coroutine.h
@@ -143,6 +143,7 @@ bool qemu_co_queue_empty(CoQueue *queue);
*/
typedef struct CoMutex {
bool locked;
+ Coroutine *holder;
CoQueue queue;
} CoMutex;
diff --git a/util/qemu-coroutine-lock.c b/util/qemu-coroutine-lock.c
index 22aa9abb30..f30ee8184d 100644
--- a/util/qemu-coroutine-lock.c
+++ b/util/qemu-coroutine-lock.c
@@ -129,6 +129,7 @@ void coroutine_fn qemu_co_mutex_lock(CoMutex *mutex)
}
mutex->locked = true;
+ mutex->holder = self;
trace_qemu_co_mutex_lock_return(mutex, self);
}
@@ -140,9 +141,11 @@ void coroutine_fn qemu_co_mutex_unlock(CoMutex *mutex)
trace_qemu_co_mutex_unlock_entry(mutex, self);
assert(mutex->locked == true);
+ assert(mutex->holder == self);
assert(qemu_in_coroutine());
mutex->locked = false;
+ mutex->holder = NULL;
qemu_co_queue_next(&mutex->queue);
trace_qemu_co_mutex_unlock_return(mutex, self);