src/hotspot/share/prims/unsafe.cpp

*** 364,387 ****
    oop base = JNIHandles::resolve(obj);
    Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(vc));
    ValueKlass* vk = ValueKlass::cast(k);
    assert_and_log_unsafe_value_access(base, offset, vk);
    Handle base_h(THREAD, base);
!   oop v = vk->allocate_instance(CHECK_NULL); // allocate instance
!   vk->initialize(CHECK_NULL); // If field is a default value, value class might not be initialized yet
!   vk->value_copy_payload_to_new_oop(((address)(oopDesc*)base_h()) + offset, v);
    return JNIHandles::make_local(env, v);
  } UNSAFE_END
  
  UNSAFE_ENTRY(void, Unsafe_PutValue(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jclass vc, jobject value)) {
    oop base = JNIHandles::resolve(obj);
    Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(vc));
    ValueKlass* vk = ValueKlass::cast(k);
    assert(!base->is_value() || base->mark().is_larval_state(), "must be an object instance or a larval value");
    assert_and_log_unsafe_value_access(base, offset, vk);
    oop v = JNIHandles::resolve(value);
!   vk->value_copy_oop_to_payload(v, ((address)(oopDesc*)base) + offset);
  } UNSAFE_END
  
  UNSAFE_ENTRY(jobject, Unsafe_MakePrivateBuffer(JNIEnv *env, jobject unsafe, jobject value)) {
    oop v = JNIHandles::resolve_non_null(value);
    assert(v->is_value(), "must be a value instance");
--- 364,385 ----
    oop base = JNIHandles::resolve(obj);
    Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(vc));
    ValueKlass* vk = ValueKlass::cast(k);
    assert_and_log_unsafe_value_access(base, offset, vk);
    Handle base_h(THREAD, base);
!   oop v = vk->read_flattened_field(base_h(), offset, CHECK_NULL);
    return JNIHandles::make_local(env, v);
  } UNSAFE_END
  
  UNSAFE_ENTRY(void, Unsafe_PutValue(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jclass vc, jobject value)) {
    oop base = JNIHandles::resolve(obj);
    Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(vc));
    ValueKlass* vk = ValueKlass::cast(k);
    assert(!base->is_value() || base->mark().is_larval_state(), "must be an object instance or a larval value");
    assert_and_log_unsafe_value_access(base, offset, vk);
    oop v = JNIHandles::resolve(value);
!   vk->write_flattened_field(base, offset, v, CHECK);
  } UNSAFE_END
  
  UNSAFE_ENTRY(jobject, Unsafe_MakePrivateBuffer(JNIEnv *env, jobject unsafe, jobject value)) {
    oop v = JNIHandles::resolve_non_null(value);
    assert(v->is_value(), "must be a value instance");