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8238761: Asynchronous handshakes

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Reviewed-by: pchilanomate, dcubed, dholmes, coleenp, sspitsyn
This commit is contained in:
Robbin Ehn 2020-09-29 08:50:54 +00:00
parent 6d19fe65d1
commit 6bddeb709d
24 changed files with 975 additions and 375 deletions
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7
src/hotspot/share/runtime/interfaceSupport.inline.hpp
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@ -132,10 +132,6 @@ class ThreadInVMForHandshake : public ThreadStateTransition {
void transition_back() {
// This can be invoked from transition states and must return to the original state properly
assert(_thread->thread_state() == _thread_in_vm, "should only call when leaving VM after handshake");
// Change to transition state and ensure it is seen by the VM thread.
_thread->set_thread_state_fence(_thread_in_vm_trans);
SafepointMechanism::process_if_requested(_thread);
_thread->set_thread_state(_original_state);
@ -156,6 +152,9 @@ class ThreadInVMForHandshake : public ThreadStateTransition {
}
thread->set_thread_state(_thread_in_vm);
// Threads shouldn't block if they are in the middle of printing, but...
ttyLocker::break_tty_lock_for_safepoint(os::current_thread_id());
}
~ThreadInVMForHandshake() {