--- a/src/hotspot/share/oops/instanceKlass.cpp Thu Oct 24 08:49:21 2019 -0400
+++ b/src/hotspot/share/oops/instanceKlass.cpp Thu Oct 24 08:52:33 2019 -0400
@@ -69,6 +69,7 @@
#include "prims/jvmtiThreadState.hpp"
#include "prims/methodComparator.hpp"
#include "runtime/atomic.hpp"
+#include "runtime/biasedLocking.hpp"
#include "runtime/fieldDescriptor.inline.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/javaCalls.hpp"
@@ -456,6 +457,12 @@
if (Arguments::is_dumping_archive()) {
SystemDictionaryShared::init_dumptime_info(this);
}
+
+ // Set biased locking bit for all instances of this class; it will be
+ // cleared if revocation occurs too often for this type
+ if (UseBiasedLocking && BiasedLocking::enabled()) {
+ set_prototype_header(markWord::biased_locking_prototype());
+ }
}
void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data,
@@ -2408,6 +2415,11 @@
// --> see ArrayKlass::complete_create_array_klass()
array_klasses()->restore_unshareable_info(ClassLoaderData::the_null_class_loader_data(), Handle(), CHECK);
}
+
+ // Initialize current biased locking state.
+ if (UseBiasedLocking && BiasedLocking::enabled()) {
+ set_prototype_header(markWord::biased_locking_prototype());
+ }
}
// returns true IFF is_in_error_state() has been changed as a result of this call.