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src/hotspot/share/oops/instanceKlass.cpp
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*** 151,161 ****
parser.itable_size(),
nonstatic_oop_map_size(parser.total_oop_map_count()),
parser.is_interface(),
parser.is_anonymous(),
should_store_fingerprint(parser.is_anonymous()),
! parser.has_value_fields() ? parser.java_fields_count() : 0,
parser.is_value_type());
const Symbol* const class_name = parser.class_name();
assert(class_name != NULL, "invariant");
ClassLoaderData* loader_data = parser.loader_data();
--- 151,161 ----
parser.itable_size(),
nonstatic_oop_map_size(parser.total_oop_map_count()),
parser.is_interface(),
parser.is_anonymous(),
should_store_fingerprint(parser.is_anonymous()),
! parser.has_flattenable_fields() ? parser.java_fields_count() : 0,
parser.is_value_type());
const Symbol* const class_name = parser.class_name();
assert(class_name != NULL, "invariant");
ClassLoaderData* loader_data = parser.loader_data();
*** 256,273 ****
InstanceKlass::InstanceKlass(const ClassFileParser& parser, unsigned kind) :
_static_field_size(parser.static_field_size()),
_nonstatic_oop_map_size(nonstatic_oop_map_size(parser.total_oop_map_count())),
_itable_len(parser.itable_size()),
_reference_type(parser.reference_type()),
! _extra_flags(0) {
set_vtable_length(parser.vtable_size());
set_kind(kind);
set_access_flags(parser.access_flags());
set_is_anonymous(parser.is_anonymous());
set_layout_helper(Klass::instance_layout_helper(parser.layout_size(),
false));
! if (parser.has_value_fields()) {
set_has_value_fields();
}
_java_fields_count = parser.java_fields_count();
assert(NULL == _methods, "underlying memory not zeroed?");
--- 256,274 ----
InstanceKlass::InstanceKlass(const ClassFileParser& parser, unsigned kind) :
_static_field_size(parser.static_field_size()),
_nonstatic_oop_map_size(nonstatic_oop_map_size(parser.total_oop_map_count())),
_itable_len(parser.itable_size()),
_reference_type(parser.reference_type()),
! _extra_flags(0),
! _adr_valueklass_fixed_block(NULL) {
set_vtable_length(parser.vtable_size());
set_kind(kind);
set_access_flags(parser.access_flags());
set_is_anonymous(parser.is_anonymous());
set_layout_helper(Klass::instance_layout_helper(parser.layout_size(),
false));
! if (parser.has_flattenable_fields()) {
set_has_value_fields();
}
_java_fields_count = parser.java_fields_count();
assert(NULL == _methods, "underlying memory not zeroed?");
*** 625,635 ****
// applicable to classes that are not verified
// First step: fields
for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
ResourceMark rm(THREAD);
! if (fs.field_descriptor().field_type() == T_VALUETYPE) {
Symbol* signature = fs.field_descriptor().signature();
// Get current loader and protection domain first.
oop loader = class_loader();
oop prot_domain = protection_domain();
Klass* klass = SystemDictionary::resolve_or_fail(signature,
--- 626,636 ----
// applicable to classes that are not verified
// First step: fields
for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
ResourceMark rm(THREAD);
! if (fs.field_descriptor().access_flags().is_flattenable()) {
Symbol* signature = fs.field_descriptor().signature();
// Get current loader and protection domain first.
oop loader = class_loader();
oop prot_domain = protection_domain();
Klass* klass = SystemDictionary::resolve_or_fail(signature,
*** 687,701 ****
// on an earlier link attempt
// don't verify or rewrite if already rewritten
//
if (!is_linked()) {
- // The VCC must be linked before the DVT
- if (get_vcc_klass() != NULL) {
- InstanceKlass::cast(get_vcc_klass())->link_class(CHECK_false);
- }
-
if (!is_rewritten()) {
{
bool verify_ok = verify_code(throw_verifyerror, THREAD);
if (!verify_ok) {
return false;
--- 688,697 ----
*** 800,814 ****
}
void InstanceKlass::initialize_impl(TRAPS) {
HandleMark hm(THREAD);
- // ensure outer VCC is initialized, possible some crafty code referred to VT 1st
- if (get_vcc_klass() != NULL) {
- get_vcc_klass()->initialize(CHECK);
- }
-
// Make sure klass is linked (verified) before initialization
// A class could already be verified, since it has been reflected upon.
link_class(CHECK);
DTRACE_CLASSINIT_PROBE(required, -1);
--- 796,805 ----
*** 2391,2401 ****
char* dest = NEW_RESOURCE_ARRAY(char, src_length + hash_len + 3);
// Add L as type indicator
int dest_index = 0;
! dest[dest_index++] = is_value_type_klass() ? 'Q' : 'L';
// Add the actual class name
for (int src_index = 0; src_index < src_length; ) {
dest[dest_index++] = src[src_index++];
}
--- 2382,2392 ----
char* dest = NEW_RESOURCE_ARRAY(char, src_length + hash_len + 3);
// Add L as type indicator
int dest_index = 0;
! dest[dest_index++] = 'L';
// Add the actual class name
for (int src_index = 0; src_index < src_length; ) {
dest[dest_index++] = src[src_index++];
}
*** 3894,3994 ****
#define THROW_DVT_ERROR(s) \
Exceptions::fthrow(THREAD_AND_LOCATION, vmSymbols::java_lang_IncompatibleClassChangeError(), \
"ValueCapableClass class '%s' %s", external_name(),(s)); \
return
-
- void InstanceKlass::create_value_capable_class(Handle class_loader, Handle protection_domain, TRAPS) {
- ResourceMark rm(THREAD);
- HandleMark hm(THREAD);
-
- if (!EnableMVT) {
- return; // Silent fail
- }
- // Validate VCC...
- if (!has_nonstatic_fields()) {
- THROW_DVT_ERROR("has no instance fields");
- }
- if (is_value()) {
- THROW_DVT_ERROR("is already a value type");
- }
- if (!access_flags().is_final()) {
- THROW_DVT_ERROR("is not a final class");
- }
- if (super() != SystemDictionary::Object_klass()) {
- THROW_DVT_ERROR("does not derive from Object only");
- }
-
- // All non-static are final
- GrowableArray<Handle>* fields = new GrowableArray<Handle>(THREAD, java_fields_count()*2);
- GrowableArray<jint>* fields_access = new GrowableArray<jint>(THREAD, java_fields_count()*2);
- for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
- AccessFlags access_flags = fs.access_flags();
- if (access_flags.is_static()) {
- continue;
- }
- if (!access_flags.is_final()) {
- THROW_DVT_ERROR("contains non-final instance field");
- }
- jint flags = access_flags.get_flags();
- // Remember the field name, signature, access modifiers
- Handle h = java_lang_String::create_from_symbol(fs.name(), CHECK);
- fields->append(h);
- h = java_lang_String::create_from_symbol(fs.signature(), CHECK);
- fields->append(h);
- fields_access->append(access_flags.get_flags());
- }
-
- // Generate DVT...
- log_debug(load)("Cooking DVT for VCC %s", external_name());
- const char* this_name = name()->as_C_string();
-
- // Assemble the Java args...field descriptor array
- objArrayOop fdarr_oop = oopFactory::new_objectArray(fields->length(), CHECK);
- objArrayHandle fdarr(THREAD, fdarr_oop);
- for (int i = 0; i < fields->length(); i++) {
- fdarr->obj_at_put(i, fields->at(i)());
- }
- //...field access modifiers array
- typeArrayOop faarr_oop = oopFactory::new_intArray(fields_access->length(), CHECK);
- typeArrayHandle faarr(THREAD, faarr_oop);
- for (int i = 0; i < fields_access->length(); i++) {
- faarr->int_at_put(i, fields_access->at(i));
- }
-
- Handle vcc_name_h = java_lang_String::create_from_symbol(name(), CHECK);
- // Upcall to our Java helper...
- JavaValue result(T_OBJECT);
- JavaCallArguments args(5);
- args.push_oop(vcc_name_h);
- args.push_oop(class_loader);
- args.push_oop(protection_domain);
- args.push_oop(fdarr);
- args.push_oop(faarr);
- JavaCalls::call_static(&result,
- SystemDictionary::Valhalla_MVT1_0_klass(),
- vmSymbols::valhalla_shady_MVT1_0_createDerivedValueType(),
- vmSymbols::valhalla_shady_MVT1_0_createDerivedValueType_signature(),
- &args,
- CHECK);
- Handle returned(THREAD, (oop) result.get_jobject());
- if (returned.is_null()) {
- THROW_DVT_ERROR("unknown error deriving value type");
- }
- TempNewSymbol dvt_name_sym = java_lang_String::as_symbol(returned(), CHECK);
-
- Klass* dvt_klass = SystemDictionary::resolve_or_null(dvt_name_sym,
- class_loader,
- protection_domain,
- CHECK);
- if (!dvt_klass->is_value()) {
- THROW_DVT_ERROR("failed to resolve derived value type");
- }
- /**
- * Found it, let's point to each other to denote "is_derive_vt()"...
- */
- ValueKlass* vt_klass = ValueKlass::cast(dvt_klass);
- assert(vt_klass->class_loader() == class_loader(), "DVT Not the same class loader as VCC");
- vt_klass->set_vcc_klass(this);
- log_debug(load)("Cooked DVT %s for VCC %s", vt_klass->external_name(), external_name());
- }
-
--- 3885,3889 ----
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