--- a/src/hotspot/os/solaris/os_solaris.cpp Mon Nov 25 12:32:07 2019 +0100
+++ b/src/hotspot/os/solaris/os_solaris.cpp Mon Nov 25 12:32:40 2019 +0100
@@ -4797,7 +4797,7 @@
// from the first park() call after an unpark() call which will help
// shake out uses of park() and unpark() without condition variables.
- if (Atomic::xchg(1, &_Event) >= 0) return;
+ if (Atomic::xchg(&_Event, 1) >= 0) return;
// If the thread associated with the event was parked, wake it.
// Wait for the thread assoc with the PlatformEvent to vacate.
@@ -4896,7 +4896,7 @@
// Return immediately if a permit is available.
// We depend on Atomic::xchg() having full barrier semantics
// since we are doing a lock-free update to _counter.
- if (Atomic::xchg(0, &_counter) > 0) return;
+ if (Atomic::xchg(&_counter, 0) > 0) return;
// Optional fast-exit: Check interrupt before trying to wait
Thread* thread = Thread::current();