< prev index next > src/hotspot/share/classfile/systemDictionary.cpp
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#include "memory/metaspaceClosure.hpp"
#include "memory/oopFactory.hpp"
#include "memory/resourceArea.hpp"
#include "memory/universe.hpp"
#include "oops/access.inline.hpp"
+ #include "oops/fieldStreams.inline.hpp"
#include "oops/instanceKlass.hpp"
#include "oops/klass.inline.hpp"
#include "oops/method.inline.hpp"
#include "oops/objArrayKlass.hpp"
#include "oops/objArrayOop.inline.hpp"
#include "oops/oop.hpp"
#include "oops/oopHandle.hpp"
#include "oops/oopHandle.inline.hpp"
#include "oops/symbol.hpp"
#include "oops/typeArrayKlass.hpp"
+ #include "oops/inlineKlass.inline.hpp"
#include "prims/jvmtiExport.hpp"
#include "prims/methodHandles.hpp"
#include "runtime/arguments.hpp"
#include "runtime/atomic.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/java.hpp"
#include "runtime/javaCalls.hpp"
#include "runtime/mutexLocker.hpp"
+ #include "runtime/os.hpp"
#include "runtime/sharedRuntime.hpp"
#include "runtime/signature.hpp"
#include "runtime/synchronizer.hpp"
#include "services/classLoadingService.hpp"
#include "services/diagnosticCommand.hpp"
return resolve_array_class_or_null(class_name, class_loader, protection_domain, THREAD);
} else {
assert(class_name != nullptr && !Signature::is_array(class_name), "must be");
if (Signature::has_envelope(class_name)) {
ResourceMark rm(THREAD);
- // Ignore wrapping L and ;.
+ // Ignore wrapping L and ; (and Q and ; for value types).
TempNewSymbol name = SymbolTable::new_symbol(class_name->as_C_string() + 1,
class_name->utf8_length() - 2);
return resolve_instance_class_or_null(name, class_loader, protection_domain, THREAD);
} else {
return resolve_instance_class_or_null(class_name, class_loader, protection_domain, THREAD);
MutexLocker mu(THREAD, SystemDictionary_lock);
InstanceKlass* klassk = dictionary->find_class(THREAD, class_name);
InstanceKlass* quicksuperk;
// To support parallel loading: if class is done loading, just return the superclass
// if the next_name matches class->super()->name() and if the class loaders match.
+ // Otherwise, a LinkageError will be thrown later.
if (klassk != nullptr && is_superclass &&
((quicksuperk = klassk->java_super()) != nullptr) &&
((quicksuperk->name() == next_name) &&
(quicksuperk->class_loader() == class_loader()))) {
return quicksuperk;
// Check if a shared class can be loaded by the specific classloader.
bool SystemDictionary::is_shared_class_visible(Symbol* class_name,
InstanceKlass* ik,
PackageEntry* pkg_entry,
Handle class_loader) {
- assert(!ModuleEntryTable::javabase_moduleEntry()->is_patched(),
- "Cannot use sharing if java.base is patched");
+ assert(!CDSConfig::module_patching_disables_cds(), "Cannot use CDS");
// (1) Check if we are loading into the same loader as in dump time.
if (ik->is_shared_boot_class()) {
if (class_loader() != nullptr) {
if (was_archived_from_named_module) {
if (should_be_in_named_module) {
// Is the module loaded from the same location as during dump time?
visible = mod_entry->shared_path_index() == scp_index;
if (visible) {
- assert(!mod_entry->is_patched(), "cannot load archived classes for patched module");
+ assert(!CDSConfig::module_patching_disables_cds(), "Cannot use CDS");
}
} else {
// During dump time, this class was in a named module, but at run time, this class should be
// in an unnamed module.
visible = false;
if (!check) {
ik->set_shared_loading_failed();
return nullptr;
}
+ if (ik->has_inline_type_fields()) {
+ for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
+ if (fs.access_flags().is_static()) continue;
+ Symbol* sig = fs.signature();
+ if (fs.is_null_free_inline_type()) {
+ // Pre-load inline class
+ TempNewSymbol name = Signature::strip_envelope(sig);
+ Klass* real_k = SystemDictionary::resolve_with_circularity_detection_or_fail(ik->name(), name,
+ class_loader, protection_domain, false, CHECK_NULL);
+ Klass* k = ik->get_inline_type_field_klass_or_null(fs.index());
+ if (real_k != k) {
+ // oops, the app has substituted a different version of k!
+ return nullptr;
+ }
+ } else if (Signature::has_envelope(sig)) {
+ TempNewSymbol name = Signature::strip_envelope(sig);
+ if (name != ik->name() && ik->is_class_in_loadable_descriptors_attribute(name)) {
+ Klass* real_k = SystemDictionary::resolve_with_circularity_detection_or_fail(ik->name(), name,
+ class_loader, protection_domain, false, THREAD);
+ if (HAS_PENDING_EXCEPTION) {
+ CLEAR_PENDING_EXCEPTION;
+ }
+ Klass* k = ik->get_inline_type_field_klass_or_null(fs.index());
+ if (real_k != k) {
+ // oops, the app has substituted a different version of k!
+ return nullptr;
+ }
+ }
+ }
+ }
+ }
+
InstanceKlass* new_ik = nullptr;
// CFLH check is skipped for VM hidden classes (see KlassFactory::create_from_stream).
// It will be skipped for shared VM hidden lambda proxy classes.
if (!SystemDictionaryShared::is_hidden_lambda_proxy(ik)) {
new_ik = KlassFactory::check_shared_class_file_load_hook(
// restore_unshareable_info which calls ik->set_package()
ik->restore_unshareable_info(loader_data, protection_domain, pkg_entry, CHECK_NULL);
}
load_shared_class_misc(ik, loader_data);
+
return ik;
}
void SystemDictionary::load_shared_class_misc(InstanceKlass* ik, ClassLoaderData* loader_data) {
ik->print_class_load_logging(loader_data, nullptr, nullptr);
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