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/*
! * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
/*
! * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
*/
#include "precompiled.hpp"
#include "cds/archiveBuilder.hpp"
#include "cds/cdsConfig.hpp"
#include "cds/classPrelinker.hpp"
#include "classfile/systemDictionary.hpp"
#include "classfile/vmClasses.hpp"
#include "memory/resourceArea.hpp"
#include "oops/constantPool.inline.hpp"
#include "oops/instanceKlass.hpp"
#include "oops/klass.inline.hpp"
#include "runtime/handles.inline.hpp"
ClassPrelinker::ClassesTable* ClassPrelinker::_processed_classes = nullptr;
- ClassPrelinker::ClassesTable* ClassPrelinker::_vm_classes = nullptr;
-
- bool ClassPrelinker::is_vm_class(InstanceKlass* ik) {
- return (_vm_classes->get(ik) != nullptr);
- }
-
- void ClassPrelinker::add_one_vm_class(InstanceKlass* ik) {
- bool created;
- _vm_classes->put_if_absent(ik, &created);
- if (created) {
- InstanceKlass* super = ik->java_super();
- if (super != nullptr) {
- add_one_vm_class(super);
- }
- Array<InstanceKlass*>* ifs = ik->local_interfaces();
- for (int i = 0; i < ifs->length(); i++) {
- add_one_vm_class(ifs->at(i));
- }
- }
- }
void ClassPrelinker::initialize() {
- assert(_vm_classes == nullptr, "must be");
- _vm_classes = new (mtClass)ClassesTable();
_processed_classes = new (mtClass)ClassesTable();
- for (auto id : EnumRange<vmClassID>{}) {
- add_one_vm_class(vmClasses::klass_at(id));
- }
}
void ClassPrelinker::dispose() {
- assert(_vm_classes != nullptr, "must be");
- delete _vm_classes;
delete _processed_classes;
- _vm_classes = nullptr;
_processed_classes = nullptr;
}
! bool ClassPrelinker::can_archive_resolved_klass(ConstantPool* cp, int cp_index) {
assert(!is_in_archivebuilder_buffer(cp), "sanity");
- assert(cp->tag_at(cp_index).is_klass(), "must be resolved");
! Klass* resolved_klass = cp->resolved_klass_at(cp_index);
! assert(resolved_klass != nullptr, "must be");
! return can_archive_resolved_klass(cp->pool_holder(), resolved_klass);
}
! bool ClassPrelinker::can_archive_resolved_klass(InstanceKlass* cp_holder, Klass* resolved_klass) {
assert(!is_in_archivebuilder_buffer(cp_holder), "sanity");
! assert(!is_in_archivebuilder_buffer(resolved_klass), "sanity");
!
! if (resolved_klass->is_instance_klass()) {
! InstanceKlass* ik = InstanceKlass::cast(resolved_klass);
! if (is_vm_class(ik)) { // These are safe to resolve. See is_vm_class declaration.
! assert(ik->is_shared_boot_class(), "vmClasses must be loaded by boot loader");
! if (cp_holder->is_shared_boot_class()) {
- // For now, do this for boot loader only. Other loaders
- // must go through ConstantPool::klass_at_impl at runtime
- // to put this class in their directory.
-
- // TODO: we can support the platform and app loaders as well, if we
- // preload the vmClasses into these two loaders during VM bootstrap.
- return true;
- }
}
if (cp_holder->is_subtype_of(ik)) {
// All super types of ik will be resolved in ik->class_loader() before
// ik is defined in this loader, so it's safe to archive the resolved klass reference.
return true;
}
! // TODO -- allow objArray classes, too
}
!
return false;
}
void ClassPrelinker::dumptime_resolve_constants(InstanceKlass* ik, TRAPS) {
! constantPoolHandle cp(THREAD, ik->constants());
- if (cp->cache() == nullptr || cp->reference_map() == nullptr) {
- // The cache may be null if the pool_holder klass fails verification
- // at dump time due to missing dependencies.
return;
}
-
bool first_time;
_processed_classes->put_if_absent(ik, &first_time);
if (!first_time) {
// We have already resolved the constants in class, so no need to do it again.
return;
}
for (int cp_index = 1; cp_index < cp->length(); cp_index++) { // Index 0 is unused
! switch (cp->tag_at(cp_index).value()) {
- case JVM_CONSTANT_UnresolvedClass:
- maybe_resolve_class(cp, cp_index, CHECK);
- break;
-
- case JVM_CONSTANT_String:
resolve_string(cp, cp_index, CHECK); // may throw OOM when interning strings.
! break;
}
}
}
! Klass* ClassPrelinker::find_loaded_class(JavaThread* THREAD, oop class_loader, Symbol* name) {
! HandleMark hm(THREAD);
! Handle h_loader(THREAD, class_loader);
! Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, name,
h_loader,
Handle());
if (k != nullptr) {
return k;
}
! if (class_loader == SystemDictionary::java_system_loader()) {
! return find_loaded_class(THREAD, SystemDictionary::java_platform_loader(), name);
! } else if (class_loader == SystemDictionary::java_platform_loader()) {
! return find_loaded_class(THREAD, nullptr, name);
}
return nullptr;
}
! Klass* ClassPrelinker::maybe_resolve_class(constantPoolHandle cp, int cp_index, TRAPS) {
! assert(!is_in_archivebuilder_buffer(cp()), "sanity");
! InstanceKlass* cp_holder = cp->pool_holder();
- if (!cp_holder->is_shared_boot_class() &&
- !cp_holder->is_shared_platform_class() &&
- !cp_holder->is_shared_app_class()) {
- // Don't trust custom loaders, as they may not be well-behaved
- // when resolving classes.
- return nullptr;
- }
-
- Symbol* name = cp->klass_name_at(cp_index);
- Klass* resolved_klass = find_loaded_class(THREAD, cp_holder->class_loader(), name);
- if (resolved_klass != nullptr && can_archive_resolved_klass(cp_holder, resolved_klass)) {
- Klass* k = cp->klass_at(cp_index, CHECK_NULL); // Should fail only with OOM
- assert(k == resolved_klass, "must be");
- }
-
- return resolved_klass;
}
#if INCLUDE_CDS_JAVA_HEAP
void ClassPrelinker::resolve_string(constantPoolHandle cp, int cp_index, TRAPS) {
if (CDSConfig::is_dumping_heap()) {
*
*/
#include "precompiled.hpp"
#include "cds/archiveBuilder.hpp"
+ #include "cds/archiveUtils.inline.hpp"
#include "cds/cdsConfig.hpp"
#include "cds/classPrelinker.hpp"
+ #include "cds/classPreloader.hpp"
+ #include "cds/classListWriter.hpp"
+ #include "cds/finalImageRecipes.hpp"
+ #include "cds/heapShared.hpp"
+ #include "cds/lambdaFormInvokers.inline.hpp"
+ #include "cds/regeneratedClasses.hpp"
+ #include "classfile/classLoader.hpp"
+ #include "classfile/classLoaderExt.hpp"
+ #include "classfile/dictionary.hpp"
+ #include "classfile/symbolTable.hpp"
#include "classfile/systemDictionary.hpp"
+ #include "classfile/systemDictionaryShared.hpp"
#include "classfile/vmClasses.hpp"
+ #include "interpreter/bytecode.hpp"
+ #include "interpreter/bytecodeStream.hpp"
+ #include "interpreter/interpreterRuntime.hpp"
+ #include "interpreter/linkResolver.hpp"
+ #include "memory/oopFactory.hpp"
#include "memory/resourceArea.hpp"
#include "oops/constantPool.inline.hpp"
+ #include "oops/fieldStreams.inline.hpp"
#include "oops/instanceKlass.hpp"
#include "oops/klass.inline.hpp"
#include "runtime/handles.inline.hpp"
+ #include "runtime/javaCalls.hpp"
+ #include "runtime/perfData.inline.hpp"
+ #include "runtime/timer.hpp"
+ #include "runtime/signature.hpp"
ClassPrelinker::ClassesTable* ClassPrelinker::_processed_classes = nullptr;
void ClassPrelinker::initialize() {
_processed_classes = new (mtClass)ClassesTable();
}
void ClassPrelinker::dispose() {
delete _processed_classes;
_processed_classes = nullptr;
}
! // Returns true if we CAN PROVE that cp_index will always resolve to
+ // the same information at both dump time and run time. This is a
+ // necessary (but not sufficient) condition for pre-resolving cp_index
+ // during CDS archive assembly.
+ bool ClassPrelinker::is_resolution_deterministic(ConstantPool* cp, int cp_index) {
assert(!is_in_archivebuilder_buffer(cp), "sanity");
! if (cp->tag_at(cp_index).is_klass()) {
! // We require cp_index to be already resolved. This is fine for now, are we
+ // currently archive only CP entries that are already resolved.
+ Klass* resolved_klass = cp->resolved_klass_at(cp_index);
+ return resolved_klass != nullptr && is_class_resolution_deterministic(cp->pool_holder(), resolved_klass);
+ } else if (cp->tag_at(cp_index).is_invoke_dynamic()) {
+ return is_indy_resolution_deterministic(cp, cp_index);
+ } else if (cp->tag_at(cp_index).is_field() ||
+ cp->tag_at(cp_index).is_method() ||
+ cp->tag_at(cp_index).is_interface_method()) {
+ int klass_cp_index = cp->uncached_klass_ref_index_at(cp_index);
+ if (!cp->tag_at(klass_cp_index).is_klass()) {
+ // Not yet resolved
+ return false;
+ }
+ Klass* k = cp->resolved_klass_at(klass_cp_index);
+ if (!is_class_resolution_deterministic(cp->pool_holder(), k)) {
+ return false;
+ }
+
+ if (!k->is_instance_klass()) { // FIXME -- remove this check, and add a test case
+ // FIXME: is it valid to have a non-instance klass in method refs?
+ return false;
+ }
! // Here, We don't check if this entry can actually be resolved to a valid Field/Method.
+ // This method should be called by the ConstantPool to check Fields/Methods that
+ // have already been successfully resolved.
+ return true;
+ } else {
+ return false;
+ }
}
! bool ClassPrelinker::is_class_resolution_deterministic(InstanceKlass* cp_holder, Klass* resolved_class) {
assert(!is_in_archivebuilder_buffer(cp_holder), "sanity");
! assert(!is_in_archivebuilder_buffer(resolved_class), "sanity");
!
! if (resolved_class->is_instance_klass()) {
! InstanceKlass* ik = InstanceKlass::cast(resolved_class);
!
! if (!ik->is_shared() && SystemDictionaryShared::is_excluded_class(ik)) {
! return false;
}
if (cp_holder->is_subtype_of(ik)) {
// All super types of ik will be resolved in ik->class_loader() before
// ik is defined in this loader, so it's safe to archive the resolved klass reference.
return true;
}
! if (ClassPreloader::is_preloaded_class(ik)) {
+ if (cp_holder->is_shared_platform_class()) {
+ ClassPreloader::add_initiated_class(cp_holder, ik);
+ return true;
+ } else if (cp_holder->is_shared_app_class()) {
+ ClassPreloader::add_initiated_class(cp_holder, ik);
+ return true;
+ } else if (cp_holder->is_shared_boot_class()) {
+ assert(ik->class_loader() == nullptr, "a boot class can reference only boot classes");
+ return true;
+ } else if (cp_holder->is_hidden() && cp_holder->class_loader() == nullptr) { // FIXME -- use better checks!
+ return true;
+ }
+ }
+ } else if (resolved_class->is_objArray_klass()) {
+ Klass* elem = ObjArrayKlass::cast(resolved_class)->bottom_klass();
+ if (elem->is_instance_klass()) {
+ return is_class_resolution_deterministic(cp_holder, InstanceKlass::cast(elem));
+ } else if (elem->is_typeArray_klass()) {
+ return true;
+ }
+ } else if (resolved_class->is_typeArray_klass()) {
+ return true;
}
!
return false;
}
void ClassPrelinker::dumptime_resolve_constants(InstanceKlass* ik, TRAPS) {
! if (!ik->is_linked()) {
return;
}
bool first_time;
_processed_classes->put_if_absent(ik, &first_time);
if (!first_time) {
// We have already resolved the constants in class, so no need to do it again.
return;
}
+ constantPoolHandle cp(THREAD, ik->constants());
for (int cp_index = 1; cp_index < cp->length(); cp_index++) { // Index 0 is unused
! if (cp->tag_at(cp_index).value() == JVM_CONSTANT_String) {
resolve_string(cp, cp_index, CHECK); // may throw OOM when interning strings.
! }
+ }
+
+ // Normally, we don't want to archive any CP entries that were not resolved
+ // in the training run. Otherwise the AOT/JIT may inline too much code that has not
+ // been executed.
+ //
+ // However, we want to aggressively resolve all klass/field/method constants for
+ // LambdaForm Invoker Holder classes, Lambda Proxy classes, and LambdaForm classes,
+ // so that the compiler can inline through them.
+ if (SystemDictionaryShared::is_builtin_loader(ik->class_loader_data())) {
+ bool eager_resolve = false;
+
+ if (LambdaFormInvokers::may_be_regenerated_class(ik->name())) {
+ eager_resolve = true;
+ }
+ if (ik->is_hidden() && HeapShared::is_archivable_hidden_klass(ik)) {
+ eager_resolve = true;
+ }
+
+ if (eager_resolve) {
+ preresolve_class_cp_entries(THREAD, ik, nullptr);
+ preresolve_field_and_method_cp_entries(THREAD, ik, nullptr);
}
}
}
! // This works only for the boot/platform/app loaders
! Klass* ClassPrelinker::find_loaded_class(Thread* current, oop class_loader, Symbol* name) {
! HandleMark hm(current);
! Handle h_loader(current, class_loader);
+ Klass* k = SystemDictionary::find_instance_or_array_klass(current, name,
h_loader,
Handle());
if (k != nullptr) {
return k;
}
! if (h_loader() == SystemDictionary::java_system_loader()) {
! return find_loaded_class(current, SystemDictionary::java_platform_loader(), name);
! } else if (h_loader() == SystemDictionary::java_platform_loader()) {
! return find_loaded_class(current, nullptr, name);
+ } else {
+ assert(h_loader() == nullptr, "This function only works for boot/platform/app loaders %p %p %p",
+ cast_from_oop<address>(h_loader()),
+ cast_from_oop<address>(SystemDictionary::java_system_loader()),
+ cast_from_oop<address>(SystemDictionary::java_platform_loader()));
}
return nullptr;
}
! Klass* ClassPrelinker::find_loaded_class(Thread* current, ConstantPool* cp, int class_cp_index) {
! Symbol* name = cp->klass_name_at(class_cp_index);
! return find_loaded_class(current, cp->pool_holder()->class_loader(), name);
}
#if INCLUDE_CDS_JAVA_HEAP
void ClassPrelinker::resolve_string(constantPoolHandle cp, int cp_index, TRAPS) {
if (CDSConfig::is_dumping_heap()) {
ConstantPool::string_at_impl(cp, cp_index, cache_index, CHECK);
}
}
#endif
+ void ClassPrelinker::preresolve_class_cp_entries(JavaThread* current, InstanceKlass* ik, GrowableArray<bool>* preresolve_list) {
+ if (!PreloadSharedClasses) {
+ return;
+ }
+ if (!SystemDictionaryShared::is_builtin_loader(ik->class_loader_data())) {
+ return;
+ }
+
+ JavaThread* THREAD = current;
+ constantPoolHandle cp(THREAD, ik->constants());
+ for (int cp_index = 1; cp_index < cp->length(); cp_index++) {
+ if (cp->tag_at(cp_index).value() == JVM_CONSTANT_UnresolvedClass) {
+ if (preresolve_list != nullptr && preresolve_list->at(cp_index) == false) {
+ // This class was not resolved during trial run. Don't attempt to resolve it. Otherwise
+ // the compiler may generate less efficient code.
+ continue;
+ }
+ if (find_loaded_class(current, cp(), cp_index) == nullptr) {
+ // Do not resolve any class that has not been loaded yet
+ continue;
+ }
+ Klass* resolved_klass = cp->klass_at(cp_index, THREAD);
+ if (HAS_PENDING_EXCEPTION) {
+ CLEAR_PENDING_EXCEPTION; // just ignore
+ } else {
+ log_trace(cds, resolve)("Resolved class [%3d] %s -> %s", cp_index, ik->external_name(),
+ resolved_klass->external_name());
+ }
+ }
+ }
+ }
+
+ void ClassPrelinker::preresolve_field_and_method_cp_entries(JavaThread* current, InstanceKlass* ik, GrowableArray<bool>* preresolve_list) {
+ JavaThread* THREAD = current;
+ constantPoolHandle cp(THREAD, ik->constants());
+ if (cp->cache() == nullptr) {
+ return;
+ }
+ for (int i = 0; i < ik->methods()->length(); i++) {
+ Method* m = ik->methods()->at(i);
+ BytecodeStream bcs(methodHandle(THREAD, m));
+ while (!bcs.is_last_bytecode()) {
+ bcs.next();
+ Bytecodes::Code raw_bc = bcs.raw_code();
+ switch (raw_bc) {
+ case Bytecodes::_getstatic:
+ case Bytecodes::_putstatic:
+ case Bytecodes::_getfield:
+ case Bytecodes::_putfield:
+ maybe_resolve_fmi_ref(ik, m, raw_bc, bcs.get_index_u2(), preresolve_list, THREAD);
+ if (HAS_PENDING_EXCEPTION) {
+ CLEAR_PENDING_EXCEPTION; // just ignore
+ }
+ break;
+ case Bytecodes::_invokehandle:
+ case Bytecodes::_invokespecial:
+ case Bytecodes::_invokevirtual:
+ case Bytecodes::_invokeinterface:
+ case Bytecodes::_invokestatic:
+ maybe_resolve_fmi_ref(ik, m, raw_bc, bcs.get_index_u2(), preresolve_list, THREAD);
+ if (HAS_PENDING_EXCEPTION) {
+ CLEAR_PENDING_EXCEPTION; // just ignore
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ }
+
+ void ClassPrelinker::maybe_resolve_fmi_ref(InstanceKlass* ik, Method* m, Bytecodes::Code bc, int raw_index,
+ GrowableArray<bool>* preresolve_list, TRAPS) {
+ methodHandle mh(THREAD, m);
+ constantPoolHandle cp(THREAD, ik->constants());
+ HandleMark hm(THREAD);
+ int cp_index = cp->to_cp_index(raw_index, bc);
+
+ if (cp->is_resolved(raw_index, bc)) {
+ return;
+ }
+
+ if (preresolve_list != nullptr && preresolve_list->at(cp_index) == false) {
+ // This field wasn't resolved during the trial run. Don't attempt to resolve it. Otherwise
+ // the compiler may generate less efficient code.
+ return;
+ }
+
+ int klass_cp_index = cp->uncached_klass_ref_index_at(cp_index);
+ if (find_loaded_class(THREAD, cp(), klass_cp_index) == nullptr) {
+ // Do not resolve any field/methods from a class that has not been loaded yet.
+ return;
+ }
+
+ Klass* resolved_klass = cp->klass_ref_at(raw_index, bc, CHECK);
+ const char* is_static = "";
+
+ switch (bc) {
+ case Bytecodes::_getstatic:
+ case Bytecodes::_putstatic:
+ if (!VM_Version::supports_fast_class_init_checks()) {
+ return; // Do not resolve since interpreter lacks fast clinit barriers support
+ }
+ InterpreterRuntime::resolve_get_put(bc, raw_index, mh, cp, false /*initialize_holder*/, CHECK);
+ is_static = " *** static";
+ break;
+ case Bytecodes::_getfield:
+ case Bytecodes::_putfield:
+ InterpreterRuntime::resolve_get_put(bc, raw_index, mh, cp, false /*initialize_holder*/, CHECK);
+ break;
+
+ case Bytecodes::_invokestatic:
+ if (!VM_Version::supports_fast_class_init_checks()) {
+ return; // Do not resolve since interpreter lacks fast clinit barriers support
+ }
+ InterpreterRuntime::cds_resolve_invoke(bc, raw_index, mh, cp, CHECK);
+ is_static = " *** static";
+ break;
+
+ case Bytecodes::_invokevirtual:
+ case Bytecodes::_invokespecial:
+ case Bytecodes::_invokeinterface:
+ InterpreterRuntime::cds_resolve_invoke(bc, raw_index, mh, cp, CHECK);
+ break;
+
+ case Bytecodes::_invokehandle:
+ InterpreterRuntime::cds_resolve_invokehandle(raw_index, cp, CHECK);
+ break;
+
+ default:
+ ShouldNotReachHere();
+ }
+
+ if (log_is_enabled(Trace, cds, resolve)) {
+ ResourceMark rm(THREAD);
+ bool resolved = cp->is_resolved(raw_index, bc);
+ Symbol* name = cp->name_ref_at(raw_index, bc);
+ Symbol* signature = cp->signature_ref_at(raw_index, bc);
+ log_trace(cds, resolve)("%s %s [%3d] %s -> %s.%s:%s%s",
+ (resolved ? "Resolved" : "Failed to resolve"),
+ Bytecodes::name(bc), cp_index, ik->external_name(),
+ resolved_klass->external_name(),
+ name->as_C_string(), signature->as_C_string(), is_static);
+ }
+ }
+
+ void ClassPrelinker::preresolve_indy_cp_entries(JavaThread* current, InstanceKlass* ik, GrowableArray<bool>* preresolve_list) {
+ JavaThread* THREAD = current;
+ constantPoolHandle cp(THREAD, ik->constants());
+ if (!ArchiveInvokeDynamic || cp->cache() == nullptr) {
+ return;
+ }
+
+ assert(preresolve_list != nullptr, "preresolve_indy_cp_entries() should not be called for "
+ "regenerated LambdaForm Invoker classes, which should not have indys anyway.");
+
+ Array<ResolvedIndyEntry>* indy_entries = cp->cache()->resolved_indy_entries();
+ for (int i = 0; i < indy_entries->length(); i++) {
+ ResolvedIndyEntry* rie = indy_entries->adr_at(i);
+ int cp_index = rie->constant_pool_index();
+ if (preresolve_list->at(cp_index) == true && !rie->is_resolved() && is_indy_resolution_deterministic(cp(), cp_index)) {
+ InterpreterRuntime::cds_resolve_invokedynamic(i, cp, THREAD);
+ if (HAS_PENDING_EXCEPTION) {
+ CLEAR_PENDING_EXCEPTION; // just ignore
+ }
+ }
+ }
+ }
+
+ static GrowableArrayCHeap<char*, mtClassShared>* _invokedynamic_filter = nullptr;
+
+ static bool has_clinit(InstanceKlass* ik) {
+ if (ik->class_initializer() != nullptr) {
+ return true;
+ }
+ InstanceKlass* super = ik->java_super();
+ if (super != nullptr && has_clinit(super)) {
+ return true;
+ }
+ Array<InstanceKlass*>* interfaces = ik->local_interfaces();
+ int num_interfaces = interfaces->length();
+ for (int index = 0; index < num_interfaces; index++) {
+ InstanceKlass* intf = interfaces->at(index);
+ if (has_clinit(intf)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ bool ClassPrelinker::is_indy_resolution_deterministic(ConstantPool* cp, int cp_index) {
+ assert(cp->tag_at(cp_index).is_invoke_dynamic(), "sanity");
+ if (!ArchiveInvokeDynamic || !HeapShared::can_write()) {
+ return false;
+ }
+
+ if (!SystemDictionaryShared::is_builtin(cp->pool_holder())) {
+ return false;
+ }
+
+ int bsm = cp->bootstrap_method_ref_index_at(cp_index);
+ int bsm_ref = cp->method_handle_index_at(bsm);
+ Symbol* bsm_name = cp->uncached_name_ref_at(bsm_ref);
+ Symbol* bsm_signature = cp->uncached_signature_ref_at(bsm_ref);
+ Symbol* bsm_klass = cp->klass_name_at(cp->uncached_klass_ref_index_at(bsm_ref));
+
+ // We currently support only string concat and LambdaMetafactory::metafactory()
+
+ if (bsm_klass->equals("java/lang/invoke/StringConcatFactory") &&
+ bsm_name->equals("makeConcatWithConstants")) {
+ return true;
+ }
+
+ if (bsm_klass->equals("java/lang/invoke/LambdaMetafactory") &&
+ ((bsm_name->equals("metafactory") && bsm_signature->equals("(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;")) ||
+ (bsm_name->equals("altMetafactory") && bsm_signature->equals("(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;")))) {
+ SignatureStream ss(cp->uncached_signature_ref_at(cp_index));
+ ss.skip_to_return_type();
+ Symbol* type = ss.as_symbol(); // This is the interface type implemented by the lambda proxy
+ InstanceKlass* holder = cp->pool_holder();
+ Klass* k = find_loaded_class(Thread::current(), holder->class_loader(), type);
+ if (k == nullptr) {
+ return false;
+ }
+ if (!k->is_interface()) {
+ // Might be a class not generated by javac
+ return false;
+ }
+
+ if (has_clinit(InstanceKlass::cast(k))) {
+ // We initialize the class of the archived lambda proxy at VM start-up, which will also initialize
+ // the interface that it implements. If that interface has a clinit method, we can potentially
+ // change program execution order. See test/hotspot/jtreg/runtime/cds/appcds/indy/IndyMiscTests.java
+ if (log_is_enabled(Debug, cds, resolve)) {
+ ResourceMark rm;
+ log_debug(cds, resolve)("Cannot resolve Lambda proxy of interface type %s", k->external_name());
+ }
+ return false;
+ }
+
+ return true;
+ }
+
+ return false;
+ }
+
#ifdef ASSERT
bool ClassPrelinker::is_in_archivebuilder_buffer(address p) {
if (!Thread::current()->is_VM_thread() || ArchiveBuilder::current() == nullptr) {
return false;
} else {
return ArchiveBuilder::current()->is_in_buffer_space(p);
}
}
#endif
+
+ int ClassPrelinker::class_reflection_data_flags(InstanceKlass* ik, TRAPS) {
+ assert(java_lang_Class::has_reflection_data(ik->java_mirror()), "must be");
+
+ HandleMark hm(THREAD);
+ JavaCallArguments args(Handle(THREAD, ik->java_mirror()));
+ JavaValue result(T_INT);
+ JavaCalls::call_special(&result,
+ vmClasses::Class_klass(),
+ vmSymbols::encodeReflectionData_name(),
+ vmSymbols::void_int_signature(),
+ &args, CHECK_0);
+ int flags = result.get_jint();
+ log_info(cds)("Encode ReflectionData: %s (flags=0x%x)", ik->external_name(), flags);
+ return flags;
+ }
+
+ void ClassPrelinker::generate_reflection_data(JavaThread* current, InstanceKlass* ik, int rd_flags) {
+ log_info(cds)("Generate ReflectionData: %s (flags=" INT32_FORMAT_X ")", ik->external_name(), rd_flags);
+ JavaThread* THREAD = current; // for exception macros
+ JavaCallArguments args(Handle(THREAD, ik->java_mirror()));
+ args.push_int(rd_flags);
+ JavaValue result(T_OBJECT);
+ JavaCalls::call_special(&result,
+ vmClasses::Class_klass(),
+ vmSymbols::generateReflectionData_name(),
+ vmSymbols::int_void_signature(),
+ &args, THREAD);
+ if (HAS_PENDING_EXCEPTION) {
+ Handle exc_handle(THREAD, PENDING_EXCEPTION);
+ CLEAR_PENDING_EXCEPTION;
+
+ log_warning(cds)("Exception during Class::generateReflectionData() call for %s", ik->external_name());
+ LogStreamHandle(Debug, cds) log;
+ if (log.is_enabled()) {
+ java_lang_Throwable::print_stack_trace(exc_handle, &log);
+ }
+ }
+ }
+
+ Klass* ClassPrelinker::resolve_boot_class_or_fail(const char* class_name, TRAPS) {
+ Handle class_loader;
+ Handle protection_domain;
+ TempNewSymbol class_name_sym = SymbolTable::new_symbol(class_name);
+ return SystemDictionary::resolve_or_fail(class_name_sym, class_loader, protection_domain, true, THREAD);
+ }
+
+ void ClassPrelinker::trace_dynamic_proxy_class(oop loader, const char* proxy_name, objArrayOop interfaces, int access_flags) {
+ if (interfaces->length() < 1) {
+ return;
+ }
+ if (ClassListWriter::is_enabled()) {
+ const char* loader_name = ArchiveUtils::builtin_loader_name_or_null(loader);
+ if (loader_name != nullptr) {
+ stringStream ss;
+ ss.print("%s %s %d %d", loader_name, proxy_name, access_flags, interfaces->length());
+ for (int i = 0; i < interfaces->length(); i++) {
+ oop mirror = interfaces->obj_at(i);
+ Klass* k = java_lang_Class::as_Klass(mirror);
+ ss.print(" %s", k->name()->as_C_string());
+ }
+ ClassListWriter w;
+ w.stream()->print_cr("@dynamic-proxy %s", ss.freeze());
+ }
+ }
+ if (CDSConfig::is_dumping_preimage_static_archive()) {
+ FinalImageRecipes::add_dynamic_proxy_class(loader, proxy_name, interfaces, access_flags);
+ }
+ }
+
+ void ClassPrelinker::init_dynamic_proxy_cache(TRAPS) {
+ static bool inited = false;
+ if (inited) {
+ return;
+ }
+ inited = true;
+
+ Klass* klass = resolve_boot_class_or_fail("java/lang/reflect/Proxy", CHECK);
+ TempNewSymbol method = SymbolTable::new_symbol("initCacheForCDS");
+ TempNewSymbol signature = SymbolTable::new_symbol("(Ljava/lang/ClassLoader;Ljava/lang/ClassLoader;)V");
+
+ JavaCallArguments args;
+ args.push_oop(Handle(THREAD, SystemDictionary::java_platform_loader()));
+ args.push_oop(Handle(THREAD, SystemDictionary::java_system_loader()));
+ JavaValue result(T_VOID);
+ JavaCalls::call_static(&result,
+ klass,
+ method,
+ signature,
+ &args, CHECK);
+ }
+
+
+ void ClassPrelinker::define_dynamic_proxy_class(Handle loader, Handle proxy_name, Handle interfaces, int access_flags, TRAPS) {
+ if (!CDSConfig::is_dumping_dynamic_proxy() || !ArchiveDynamicProxies) {
+ return;
+ }
+ init_dynamic_proxy_cache(CHECK);
+
+ Klass* klass = resolve_boot_class_or_fail("java/lang/reflect/Proxy$ProxyBuilder", CHECK);
+ TempNewSymbol method = SymbolTable::new_symbol("defineProxyClassForCDS");
+ TempNewSymbol signature = SymbolTable::new_symbol("(Ljava/lang/ClassLoader;Ljava/lang/String;[Ljava/lang/Class;I)Ljava/lang/Class;");
+
+ JavaCallArguments args;
+ args.push_oop(Handle(THREAD, loader()));
+ args.push_oop(Handle(THREAD, proxy_name()));
+ args.push_oop(Handle(THREAD, interfaces()));
+ args.push_int(access_flags);
+ JavaValue result(T_OBJECT);
+ JavaCalls::call_static(&result,
+ klass,
+ method,
+ signature,
+ &args, CHECK);
+
+ // Assumptions:
+ // FMG is archived, which means -modulepath and -Xbootclasspath are both not specified.
+ // All named modules are loaded from the system modules files.
+ // TODO: test support for -Xbootclasspath after JDK-8322322. Some of the code below need to be changed.
+ // TODO: we just give dummy shared_classpath_index for the generated class so that it will be archived.
+ // The index is not used at runtime (see SystemDictionaryShared::load_shared_class_for_builtin_loader, which
+ // uses a null ProtectionDomain for this class)
+ oop mirror = result.get_oop();
+ assert(mirror != nullptr, "class must have been generated if not OOM");
+ InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
+ if (ik->is_shared_boot_class() || ik->is_shared_platform_class()) {
+ assert(ik->module()->is_named(), "dynamic proxies defined in unnamed modules for boot/platform loaders not supported");
+ ik->set_shared_classpath_index(0);
+ } else {
+ assert(ik->is_shared_app_class(), "must be");
+ ik->set_shared_classpath_index(ClassLoaderExt::app_class_paths_start_index());
+ }
+
+ ArchiveBuilder::alloc_stats()->record_dynamic_proxy_class();
+ if (log_is_enabled(Info, cds, dynamic, proxy)) {
+ ResourceMark rm(THREAD);
+ stringStream ss;
+ const char* prefix = "";
+ ss.print("%s (%-7s, cp index = %d) implements ", ik->external_name(),
+ ArchiveUtils::builtin_loader_name(loader()), ik->shared_classpath_index());
+ objArrayOop intfs = (objArrayOop)interfaces();
+ for (int i = 0; i < intfs->length(); i++) {
+ oop intf_mirror = intfs->obj_at(i);
+ ss.print("%s%s", prefix, java_lang_Class::as_Klass(intf_mirror)->external_name());
+ prefix = ", ";
+ }
+
+ log_info(cds, dynamic, proxy)("%s", ss.freeze());
+ }
+ }
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