< prev index next > src/hotspot/share/classfile/systemDictionaryShared.cpp
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#include "cds/classListWriter.hpp"
#include "cds/dumpTimeClassInfo.inline.hpp"
#include "cds/dynamicArchive.hpp"
#include "cds/filemap.hpp"
#include "cds/heapShared.hpp"
+ #include "cds/lambdaFormInvokers.inline.hpp"
#include "cds/metaspaceShared.hpp"
#include "cds/runTimeClassInfo.hpp"
#include "cds/unregisteredClasses.hpp"
#include "classfile/classFileStream.hpp"
#include "classfile/classLoader.hpp"
#include "memory/resourceArea.hpp"
#include "memory/universe.hpp"
#include "oops/compressedKlass.inline.hpp"
#include "oops/instanceKlass.hpp"
#include "oops/klass.inline.hpp"
+ #include "oops/methodData.hpp"
#include "oops/objArrayKlass.hpp"
#include "oops/objArrayOop.inline.hpp"
#include "oops/oop.inline.hpp"
#include "oops/oopHandle.inline.hpp"
#include "oops/typeArrayOop.inline.hpp"
SystemDictionaryShared::ArchiveInfo SystemDictionaryShared::_dynamic_archive;
DumpTimeSharedClassTable* SystemDictionaryShared::_dumptime_table = nullptr;
DumpTimeLambdaProxyClassDictionary* SystemDictionaryShared::_dumptime_lambda_proxy_class_dictionary = nullptr;
+ static bool _ignore_new_classes = false;
+
// Used by NoClassLoadingMark
DEBUG_ONLY(bool SystemDictionaryShared::_class_loading_may_happen = true;)
#ifdef ASSERT
static void check_klass_after_loading(const Klass* k) {
if (ik != nullptr && !ik->shared_loading_failed()) {
if ((SystemDictionary::is_system_class_loader(class_loader()) && ik->is_shared_app_class()) ||
(SystemDictionary::is_platform_class_loader(class_loader()) && ik->is_shared_platform_class())) {
SharedClassLoadingMark slm(THREAD, ik);
PackageEntry* pkg_entry = CDSProtectionDomain::get_package_entry_from_class(ik, class_loader);
- Handle protection_domain =
- CDSProtectionDomain::init_security_info(class_loader, ik, pkg_entry, CHECK_NULL);
+ Handle protection_domain;
+ if (!class_name->starts_with("jdk/proxy")) // java/lang/reflect/Proxy$ProxyBuilder defines the proxy classes with a null protection domain.
+ {
+ protection_domain = CDSProtectionDomain::init_security_info(class_loader, ik, pkg_entry, CHECK_NULL);
+ }
return load_shared_class(ik, class_loader, protection_domain, nullptr, pkg_entry, THREAD);
}
}
return nullptr;
}
} else {
return false;
}
}
+ void SystemDictionaryShared::ignore_new_classes() {
+ _ignore_new_classes = true;
+ }
+
+
bool SystemDictionaryShared::check_for_exclusion_impl(InstanceKlass* k) {
if (CDSConfig::is_dumping_final_static_archive() && k->is_shared_unregistered_class()
&& k->is_shared()) {
return false; // Do not exclude: unregistered classes are passed from preimage to final image.
}
if (is_jfr_event_class(k)) {
// We cannot include JFR event classes because they need runtime-specific
// instrumentation in order to work with -XX:FlightRecorderOptions:retransform=false.
// There are only a small number of these classes, so it's not worthwhile to
// support them and make CDS more complicated.
- return warn_excluded(k, "JFR event class");
+ if (!CDSConfig::is_dumping_reflection_data()) { // FIXME: !!! HACK !!!
+ return warn_excluded(k, "JFR event class");
+ }
}
if (!k->is_linked()) {
if (has_class_failed_verification(k)) {
return warn_excluded(k, "Failed verification");
// When dumping the final static archive, we will unconditionally load and link all
// classes from tje preimage. We don't want to get a VerifyError when linking this class.
return warn_excluded(k, "Unlinked class not supported by AOTConfiguration");
}
} else {
- if (!k->can_be_verified_at_dumptime()) {
+ if (!k->can_be_verified_at_dumptime() && !CDSConfig::preserve_all_dumptime_verification_states(k)) {
// We have an old class that has been linked (e.g., it's been executed during
// dump time). This class has been verified using the old verifier, which
// doesn't save the verification constraints, so check_verification_constraints()
// won't work at runtime.
// As a result, we cannot store this class. It must be loaded and fully verified
}
}
if (k == UnregisteredClasses::UnregisteredClassLoader_klass()) {
ResourceMark rm;
- log_info(cds)("Skipping %s: used only when dumping CDS archive", k->name()->as_C_string());
+ log_debug(cds)("Skipping %s: used only when dumping CDS archive", k->name()->as_C_string());
+ return true;
+ }
+
+ if (k->name()->equals("jdk/internal/misc/CDS$DummyForDynamicArchive") && !CDSConfig::is_dumping_dynamic_archive()) {
+ ResourceMark rm;
+ log_debug(cds)("Skipping %s: used only when dumping dynamic CDS archive", k->name()->as_C_string());
return true;
}
+
return false; // false == k should NOT be excluded
}
bool SystemDictionaryShared::is_builtin_loader(ClassLoaderData* loader_data) {
oop class_loader = loader_data->class_loader();
}
void SystemDictionaryShared::init_dumptime_info(InstanceKlass* k) {
MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
assert(SystemDictionaryShared::class_loading_may_happen(), "sanity");
- _dumptime_table->allocate_info(k);
+ DumpTimeClassInfo* info = _dumptime_table->allocate_info(k);
+ if (_ignore_new_classes) {
+ if (!LambdaFormInvokers::may_be_regenerated_class(k->name())) {
+ ResourceMark rm;
+ log_debug(cds)("Skipping %s: Class loaded for lambda form invoker regeneration", k->name()->as_C_string());
+ info->set_has_checked_exclusion();
+ info->set_excluded();
+ }
+ }
}
void SystemDictionaryShared::remove_dumptime_info(InstanceKlass* k) {
MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
_dumptime_table->remove(k);
}
bool SystemDictionaryShared::add_verification_constraint(InstanceKlass* k, Symbol* name,
Symbol* from_name, bool from_field_is_protected, bool from_is_array, bool from_is_object) {
assert(CDSConfig::is_dumping_archive(), "sanity");
+ if (CDSConfig::is_dumping_dynamic_archive() && k->is_shared()) {
+ // k is a new class in the static archive, but one of its supertypes is an old class, so k wasn't
+ // verified during dump time. No need to record constraints as k won't be included in the dynamic archive.
+ return false;
+ }
+ if (CDSConfig::is_dumping_aot_linked_classes() && is_builtin(k)) {
+ // There's no need to save verification constraints
+ // TODO -- double check the logic before integrating into mainline!!
+ return false;
+ }
+
DumpTimeClassInfo* info = get_info(k);
info->add_verification_constraint(k, name, from_name, from_field_is_protected,
from_is_array, from_is_object);
if (CDSConfig::is_dumping_dynamic_archive()) {
if (CDSConfig::is_dumping_invokedynamic()) {
// The lambda proxy classes will be stored as part of aot-resolved constant pool entries.
// There's no need to remember them in a separate table.
return;
}
+
if (CDSConfig::is_dumping_preimage_static_archive()) {
// Information about lambda proxies are recorded in FinalImageRecipes.
return;
}
prev_klass->set_next_link(nullptr);
proxy_klass = curr_klass;
proxy_klass->clear_lambda_proxy_is_available();
if (log_is_enabled(Debug, cds)) {
ResourceMark rm;
- log_debug(cds)("Loaded lambda proxy: %s ", proxy_klass->external_name());
+ log_debug(cds)("Loaded lambda proxy: " PTR_FORMAT " %s ", p2i(proxy_klass), proxy_klass->external_name());
}
}
}
return proxy_klass;
}
return total_size;
}
unsigned int SystemDictionaryShared::hash_for_shared_dictionary(address ptr) {
- if (ArchiveBuilder::is_active()) {
+ if (ArchiveBuilder::is_active() && ArchiveBuilder::current()->is_in_buffer_space(ptr)) {
uintx offset = ArchiveBuilder::current()->any_to_offset(ptr);
unsigned int hash = primitive_hash<uintx>(offset);
DEBUG_ONLY({
if (MetaspaceObj::is_shared((const MetaspaceObj*)ptr)) {
assert(hash == SystemDictionaryShared::hash_for_shared_dictionary_quick(ptr), "must be");
unsigned int hash = SystemDictionaryShared::hash_for_shared_dictionary_quick(name);
const RunTimeClassInfo* record = nullptr;
if (DynamicArchive::is_mapped()) {
// Use the regenerated holder classes in the dynamic archive as they
// have more methods than those in the base archive.
- if (name == vmSymbols::java_lang_invoke_Invokers_Holder() ||
- name == vmSymbols::java_lang_invoke_DirectMethodHandle_Holder() ||
- name == vmSymbols::java_lang_invoke_LambdaForm_Holder() ||
- name == vmSymbols::java_lang_invoke_DelegatingMethodHandle_Holder()) {
+ if (LambdaFormInvokers::may_be_regenerated_class(name)) {
record = dynamic_dict->lookup(name, hash, 0);
if (record != nullptr) {
return record;
}
}
assert(CDSConfig::is_dumping_static_archive(), "class ID is used only for static dump (from classlist)");
DumpTimeClassInfo* info = get_info(k);
info->_id = id;
}
- static const char* class_loader_name_for_shared(Klass* k) {
+ const char* SystemDictionaryShared::class_loader_name_for_shared(Klass* k) {
assert(k != nullptr, "Sanity");
assert(k->is_shared(), "Must be");
assert(k->is_instance_klass(), "Must be");
InstanceKlass* ik = InstanceKlass::cast(k);
if (ik->is_shared_boot_class()) {
SharedDictionaryPrinter(outputStream* st) : _st(st), _index(0) {}
void do_value(const RunTimeClassInfo* record) {
ResourceMark rm;
_st->print_cr("%4d: %s %s", _index++, record->klass()->external_name(),
- class_loader_name_for_shared(record->klass()));
+ SystemDictionaryShared::class_loader_name_for_shared(record->klass()));
if (record->klass()->array_klasses() != nullptr) {
record->klass()->array_klasses()->cds_print_value_on(_st);
_st->cr();
}
}
if (record->proxy_klass_head()->lambda_proxy_is_available()) {
ResourceMark rm;
Klass* k = record->proxy_klass_head();
while (k != nullptr) {
_st->print_cr("%4d: %s %s", _index++, k->external_name(),
- class_loader_name_for_shared(k));
+ SystemDictionaryShared::class_loader_name_for_shared(k));
k = k->next_link();
}
}
}
};
void SystemDictionaryShared::cleanup_lambda_proxy_class_dictionary() {
assert_lock_strong(DumpTimeTable_lock);
CleanupDumpTimeLambdaProxyClassTable cleanup_proxy_classes;
_dumptime_lambda_proxy_class_dictionary->unlink(&cleanup_proxy_classes);
}
+
+ void SystemDictionaryShared::create_loader_positive_lookup_cache(TRAPS) {
+ GrowableArray<InstanceKlass*> shared_classes_list;
+ {
+ // With static dumping, we have only a single Java thread (see JVM_StartThread) so
+ // no no other threads should be loading classes. Otherwise, the code below may miss some
+ // classes that are loaded concurrently.
+ assert(CDSConfig::is_dumping_static_archive(), "no other threads should be loading classes");
+
+ MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
+ _dumptime_table->iterate_all_classes_in_builtin_loaders([&](InstanceKlass* k, DumpTimeClassInfo& info) {
+ if (!k->is_hidden() && !check_for_exclusion(k, &info)) {
+ shared_classes_list.append(k);
+ }
+ }
+ );
+ }
+
+ InstanceKlass* ik = vmClasses::Class_klass();
+ objArrayOop r = oopFactory::new_objArray(ik, shared_classes_list.length(), CHECK);
+ objArrayHandle array_h(THREAD, r);
+
+ for (int i = 0; i < shared_classes_list.length(); i++) {
+ oop mirror = shared_classes_list.at(i)->java_mirror();
+ Handle mirror_h(THREAD, mirror);
+ array_h->obj_at_put(i, mirror_h());
+ }
+
+ TempNewSymbol method = SymbolTable::new_symbol("generatePositiveLookupCache");
+ TempNewSymbol signature = SymbolTable::new_symbol("([Ljava/lang/Class;)V");
+
+ JavaCallArguments args(Handle(THREAD, SystemDictionary::java_system_loader()));
+ args.push_oop(array_h);
+ JavaValue result(T_VOID);
+ JavaCalls::call_virtual(&result,
+ vmClasses::jdk_internal_loader_ClassLoaders_AppClassLoader_klass(),
+ method,
+ signature,
+ &args,
+ CHECK);
+
+ if (HAS_PENDING_EXCEPTION) {
+ Handle exc_handle(THREAD, PENDING_EXCEPTION);
+ CLEAR_PENDING_EXCEPTION;
+ ResourceMark rm(THREAD);
+
+ log_warning(cds)("Exception during AppClassLoader::generatePositiveLookupCache() call");
+ LogStreamHandle(Debug, cds) log;
+ if (log.is_enabled()) {
+ java_lang_Throwable::print_stack_trace(exc_handle, &log);
+ }
+ return;
+ }
+ }
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