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android / platform / libcore / 5088193336b / . / src / hotspot / share / classfile / systemDictionaryShared.cpp
blob: 7bc73067d810c20ab31e1c0cda5c9d3345fcfdaf [file] [log] [blame]
/*
* Copyright (c) 2014, 2020, 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.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "classfile/classFileStream.hpp"
#include "classfile/classListParser.hpp"
#include "classfile/classLoader.hpp"
#include "classfile/classLoaderData.inline.hpp"
#include "classfile/classLoaderDataGraph.hpp"
#include "classfile/classLoaderExt.hpp"
#include "classfile/dictionary.hpp"
#include "classfile/javaClasses.hpp"
#include "classfile/symbolTable.hpp"
#include "classfile/systemDictionary.hpp"
#include "classfile/systemDictionaryShared.hpp"
#include "classfile/verificationType.hpp"
#include "classfile/vmSymbols.hpp"
#include "jfr/jfrEvents.hpp"
#include "logging/log.hpp"
#include "memory/allocation.hpp"
#include "memory/archiveUtils.hpp"
#include "memory/dynamicArchive.hpp"
#include "memory/filemap.hpp"
#include "memory/heapShared.hpp"
#include "memory/metadataFactory.hpp"
#include "memory/metaspaceClosure.hpp"
#include "memory/oopFactory.hpp"
#include "memory/resourceArea.hpp"
#include "memory/universe.hpp"
#include "oops/instanceKlass.hpp"
#include "oops/klass.inline.hpp"
#include "oops/objArrayOop.inline.hpp"
#include "oops/oop.inline.hpp"
#include "oops/typeArrayOop.inline.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/java.hpp"
#include "runtime/javaCalls.hpp"
#include "runtime/mutexLocker.hpp"
#include "utilities/hashtable.inline.hpp"
#include "utilities/resourceHash.hpp"
#include "utilities/stringUtils.hpp"
OopHandle SystemDictionaryShared::_shared_protection_domains;
OopHandle SystemDictionaryShared::_shared_jar_urls;
OopHandle SystemDictionaryShared::_shared_jar_manifests;
DEBUG_ONLY(bool SystemDictionaryShared::_no_class_loading_should_happen = false;)
class DumpTimeSharedClassInfo: public CHeapObj<mtClass> {
bool _excluded;
public:
struct DTLoaderConstraint {
Symbol* _name;
char _loader_type1;
char _loader_type2;
DTLoaderConstraint(Symbol* name, char l1, char l2) : _name(name), _loader_type1(l1), _loader_type2(l2) {
_name->increment_refcount();
}
DTLoaderConstraint() : _name(NULL), _loader_type1('0'), _loader_type2('0') {}
bool equals(const DTLoaderConstraint& t) {
return t._name == _name &&
((t._loader_type1 == _loader_type1 && t._loader_type2 == _loader_type2) ||
(t._loader_type2 == _loader_type1 && t._loader_type1 == _loader_type2));
}
};
struct DTVerifierConstraint {
Symbol* _name;
Symbol* _from_name;
DTVerifierConstraint() : _name(NULL), _from_name(NULL) {}
DTVerifierConstraint(Symbol* n, Symbol* fn) : _name(n), _from_name(fn) {
_name->increment_refcount();
_from_name->increment_refcount();
}
};
InstanceKlass* _klass;
bool _failed_verification;
bool _is_archived_lambda_proxy;
int _id;
int _clsfile_size;
int _clsfile_crc32;
GrowableArray<DTVerifierConstraint>* _verifier_constraints;
GrowableArray<char>* _verifier_constraint_flags;
GrowableArray<DTLoaderConstraint>* _loader_constraints;
DumpTimeSharedClassInfo() {
_klass = NULL;
_failed_verification = false;
_is_archived_lambda_proxy = false;
_id = -1;
_clsfile_size = -1;
_clsfile_crc32 = -1;
_excluded = false;
_verifier_constraints = NULL;
_verifier_constraint_flags = NULL;
_loader_constraints = NULL;
}
void add_verification_constraint(InstanceKlass* k, Symbol* name,
Symbol* from_name, bool from_field_is_protected, bool from_is_array, bool from_is_object);
void record_linking_constraint(Symbol* name, Handle loader1, Handle loader2);
bool is_builtin() {
return SystemDictionaryShared::is_builtin(_klass);
}
int num_verifier_constraints() {
if (_verifier_constraint_flags != NULL) {
return _verifier_constraint_flags->length();
} else {
return 0;
}
}
int num_loader_constraints() {
if (_loader_constraints != NULL) {
return _loader_constraints->length();
} else {
return 0;
}
}
void metaspace_pointers_do(MetaspaceClosure* it) {
it->push(&_klass);
if (_verifier_constraints != NULL) {
for (int i = 0; i < _verifier_constraints->length(); i++) {
DTVerifierConstraint* cons = _verifier_constraints->adr_at(i);
it->push(&cons->_name);
it->push(&cons->_from_name);
}
}
if (_loader_constraints != NULL) {
for (int i = 0; i < _loader_constraints->length(); i++) {
DTLoaderConstraint* lc = _loader_constraints->adr_at(i);
it->push(&lc->_name);
}
}
}
void set_excluded() {
_excluded = true;
}
bool is_excluded() {
// _klass may become NULL due to DynamicArchiveBuilder::set_to_null
return _excluded || _failed_verification || _klass == NULL;
}
void set_failed_verification() {
_failed_verification = true;
}
bool failed_verification() {
return _failed_verification;
}
};
inline unsigned DumpTimeSharedClassTable_hash(InstanceKlass* const& k) {
if (DumpSharedSpaces) {
// Deterministic archive contents
uintx delta = k->name() - MetaspaceShared::symbol_rs_base();
return primitive_hash<uintx>(delta);
} else {
// Deterministic archive is not possible because classes can be loaded
// in multiple threads.
return primitive_hash<InstanceKlass*>(k);
}
}
class DumpTimeSharedClassTable: public ResourceHashtable<
InstanceKlass*,
DumpTimeSharedClassInfo,
&DumpTimeSharedClassTable_hash,
primitive_equals<InstanceKlass*>,
15889, // prime number
ResourceObj::C_HEAP>
{
int _builtin_count;
int _unregistered_count;
public:
DumpTimeSharedClassInfo* find_or_allocate_info_for(InstanceKlass* k) {
bool created = false;
DumpTimeSharedClassInfo* p = put_if_absent(k, &created);
if (created) {
assert(!SystemDictionaryShared::no_class_loading_should_happen(),
"no new classes can be loaded while dumping archive");
p->_klass = k;
} else {
assert(p->_klass == k, "Sanity");
}
return p;
}
class CountClassByCategory : StackObj {
DumpTimeSharedClassTable* _table;
public:
CountClassByCategory(DumpTimeSharedClassTable* table) : _table(table) {}
bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
if (!info.is_excluded()) {
if (info.is_builtin()) {
++ _table->_builtin_count;
} else {
++ _table->_unregistered_count;
}
}
return true; // keep on iterating
}
};
void update_counts() {
_builtin_count = 0;
_unregistered_count = 0;
CountClassByCategory counter(this);
iterate(&counter);
}
int count_of(bool is_builtin) const {
if (is_builtin) {
return _builtin_count;
} else {
return _unregistered_count;
}
}
};
class LambdaProxyClassKey {
template <typename T> static void original_to_target(T& field) {
if (field != NULL) {
field = DynamicArchive::original_to_target(field);
ArchivePtrMarker::mark_pointer(&field);
}
}
InstanceKlass* _caller_ik;
Symbol* _invoked_name;
Symbol* _invoked_type;
Symbol* _method_type;
Method* _member_method;
Symbol* _instantiated_method_type;
public:
LambdaProxyClassKey(InstanceKlass* caller_ik,
Symbol* invoked_name,
Symbol* invoked_type,
Symbol* method_type,
Method* member_method,
Symbol* instantiated_method_type) :
_caller_ik(caller_ik),
_invoked_name(invoked_name),
_invoked_type(invoked_type),
_method_type(method_type),
_member_method(member_method),
_instantiated_method_type(instantiated_method_type) {}
void original_to_target() {
original_to_target(_caller_ik);
original_to_target(_instantiated_method_type);
original_to_target(_invoked_name);
original_to_target(_invoked_type);
original_to_target(_member_method);
original_to_target(_method_type);
}
bool equals(LambdaProxyClassKey const& other) const {
return _caller_ik == other._caller_ik &&
_invoked_name == other._invoked_name &&
_invoked_type == other._invoked_type &&
_method_type == other._method_type &&
_member_method == other._member_method &&
_instantiated_method_type == other._instantiated_method_type;
}
unsigned int hash() const {
return SystemDictionaryShared::hash_for_shared_dictionary(_caller_ik) +
SystemDictionaryShared::hash_for_shared_dictionary(_invoked_name) +
SystemDictionaryShared::hash_for_shared_dictionary(_invoked_type) +
SystemDictionaryShared::hash_for_shared_dictionary(_method_type) +
SystemDictionaryShared::hash_for_shared_dictionary(_instantiated_method_type);
}
unsigned int dumptime_hash() const {
return primitive_hash<InstanceKlass*>(_caller_ik) +
primitive_hash<Symbol*>(_invoked_name) +
primitive_hash<Symbol*>(_invoked_type) +
primitive_hash<Symbol*>(_method_type) +
primitive_hash<Symbol*>(_instantiated_method_type);
}
static inline unsigned int DUMPTIME_HASH(LambdaProxyClassKey const& key) {
return (key.dumptime_hash());
}
static inline bool DUMPTIME_EQUALS(
LambdaProxyClassKey const& k1, LambdaProxyClassKey const& k2) {
return (k1.equals(k2));
}
};
class DumpTimeLambdaProxyClassInfo {
public:
GrowableArray<InstanceKlass*>* _proxy_klasses;
DumpTimeLambdaProxyClassInfo() : _proxy_klasses(NULL) {}
void add_proxy_klass(InstanceKlass* proxy_klass) {
if (_proxy_klasses == NULL) {
_proxy_klasses = new (ResourceObj::C_HEAP, mtClassShared)GrowableArray<InstanceKlass*>(5, mtClassShared);
}
assert(_proxy_klasses != NULL, "sanity");
_proxy_klasses->append(proxy_klass);
}
};
class RunTimeLambdaProxyClassInfo {
LambdaProxyClassKey _key;
InstanceKlass* _proxy_klass_head;
public:
RunTimeLambdaProxyClassInfo(LambdaProxyClassKey key, InstanceKlass* proxy_klass) :
_key(key), _proxy_klass_head(proxy_klass) {}
InstanceKlass* proxy_klass_head() const { return _proxy_klass_head; }
// Used by LambdaProxyClassDictionary to implement OffsetCompactHashtable::EQUALS
static inline bool EQUALS(
const RunTimeLambdaProxyClassInfo* value, LambdaProxyClassKey* key, int len_unused) {
return (value->_key.equals(*key));
}
void init(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
_key = key;
_key.original_to_target();
_proxy_klass_head = DynamicArchive::original_to_target(info._proxy_klasses->at(0));
ArchivePtrMarker::mark_pointer(&_proxy_klass_head);
}
unsigned int hash() const {
return _key.hash();
}
};
class LambdaProxyClassDictionary : public OffsetCompactHashtable<
LambdaProxyClassKey*,
const RunTimeLambdaProxyClassInfo*,
RunTimeLambdaProxyClassInfo::EQUALS> {};
LambdaProxyClassDictionary _lambda_proxy_class_dictionary;
class DumpTimeLambdaProxyClassDictionary
: public ResourceHashtable<LambdaProxyClassKey,
DumpTimeLambdaProxyClassInfo,
LambdaProxyClassKey::DUMPTIME_HASH,
LambdaProxyClassKey::DUMPTIME_EQUALS,
137, // prime number
ResourceObj::C_HEAP> {
public:
int _count;
};
DumpTimeLambdaProxyClassDictionary* _dumptime_lambda_proxy_class_dictionary = NULL;
static void add_to_dump_time_lambda_proxy_class_dictionary(LambdaProxyClassKey key,
InstanceKlass* proxy_klass) {
assert(DumpTimeTable_lock->owned_by_self(), "sanity");
if (_dumptime_lambda_proxy_class_dictionary == NULL) {
_dumptime_lambda_proxy_class_dictionary =
new (ResourceObj::C_HEAP, mtClass)DumpTimeLambdaProxyClassDictionary();
}
DumpTimeLambdaProxyClassInfo* lambda_info = _dumptime_lambda_proxy_class_dictionary->get(key);
if (lambda_info == NULL) {
DumpTimeLambdaProxyClassInfo info;
info.add_proxy_klass(proxy_klass);
_dumptime_lambda_proxy_class_dictionary->put(key, info);
//lambda_info = _dumptime_lambda_proxy_class_dictionary->get(key);
//assert(lambda_info->_proxy_klass == proxy_klass, "must be"); // debug only -- remove
++_dumptime_lambda_proxy_class_dictionary->_count;
} else {
lambda_info->add_proxy_klass(proxy_klass);
}
}
class RunTimeSharedClassInfo {
public:
struct CrcInfo {
int _clsfile_size;
int _clsfile_crc32;
};
// This is different than DumpTimeSharedClassInfo::DTVerifierConstraint. We use
// u4 instead of Symbol* to save space on 64-bit CPU.
struct RTVerifierConstraint {
u4 _name;
u4 _from_name;
Symbol* name() { return (Symbol*)(SharedBaseAddress + _name);}
Symbol* from_name() { return (Symbol*)(SharedBaseAddress + _from_name); }
};
struct RTLoaderConstraint {
u4 _name;
char _loader_type1;
char _loader_type2;
Symbol* constraint_name() {
return (Symbol*)(SharedBaseAddress + _name);
}
};
InstanceKlass* _klass;
int _num_verifier_constraints;
int _num_loader_constraints;
// optional CrcInfo _crc; (only for UNREGISTERED classes)
// optional InstanceKlass* _nest_host
// optional RTLoaderConstraint _loader_constraint_types[_num_loader_constraints]
// optional RTVerifierConstraint _verifier_constraints[_num_verifier_constraints]
// optional char _verifier_constraint_flags[_num_verifier_constraints]
private:
static size_t header_size_size() {
return sizeof(RunTimeSharedClassInfo);
}
static size_t crc_size(InstanceKlass* klass) {
if (!SystemDictionaryShared::is_builtin(klass)) {
return sizeof(CrcInfo);
} else {
return 0;
}
}
static size_t verifier_constraints_size(int num_verifier_constraints) {
return sizeof(RTVerifierConstraint) * num_verifier_constraints;
}
static size_t verifier_constraint_flags_size(int num_verifier_constraints) {
return sizeof(char) * num_verifier_constraints;
}
static size_t loader_constraints_size(int num_loader_constraints) {
return sizeof(RTLoaderConstraint) * num_loader_constraints;
}
static size_t nest_host_size(InstanceKlass* klass) {
if (klass->is_hidden()) {
return sizeof(InstanceKlass*);
} else {
return 0;
}
}
public:
static size_t byte_size(InstanceKlass* klass, int num_verifier_constraints, int num_loader_constraints) {
return header_size_size() +
crc_size(klass) +
nest_host_size(klass) +
loader_constraints_size(num_loader_constraints) +
verifier_constraints_size(num_verifier_constraints) +
verifier_constraint_flags_size(num_verifier_constraints);
}
private:
size_t crc_offset() const {
return header_size_size();
}
size_t nest_host_offset() const {
return crc_offset() + crc_size(_klass);
}
size_t loader_constraints_offset() const {
return nest_host_offset() + nest_host_size(_klass);
}
size_t verifier_constraints_offset() const {
return loader_constraints_offset() + loader_constraints_size(_num_loader_constraints);
}
size_t verifier_constraint_flags_offset() const {
return verifier_constraints_offset() + verifier_constraints_size(_num_verifier_constraints);
}
void check_verifier_constraint_offset(int i) const {
assert(0 <= i && i < _num_verifier_constraints, "sanity");
}
void check_loader_constraint_offset(int i) const {
assert(0 <= i && i < _num_loader_constraints, "sanity");
}
public:
CrcInfo* crc() const {
assert(crc_size(_klass) > 0, "must be");
return (CrcInfo*)(address(this) + crc_offset());
}
RTVerifierConstraint* verifier_constraints() {
assert(_num_verifier_constraints > 0, "sanity");
return (RTVerifierConstraint*)(address(this) + verifier_constraints_offset());
}
RTVerifierConstraint* verifier_constraint_at(int i) {
check_verifier_constraint_offset(i);
return verifier_constraints() + i;
}
char* verifier_constraint_flags() {
assert(_num_verifier_constraints > 0, "sanity");
return (char*)(address(this) + verifier_constraint_flags_offset());
}
InstanceKlass** nest_host_addr() {
assert(_klass->is_hidden(), "sanity");
return (InstanceKlass**)(address(this) + nest_host_offset());
}
InstanceKlass* nest_host() {
return *nest_host_addr();
}
void set_nest_host(InstanceKlass* k) {
*nest_host_addr() = k;
ArchivePtrMarker::mark_pointer((address*)nest_host_addr());
}
RTLoaderConstraint* loader_constraints() {
assert(_num_loader_constraints > 0, "sanity");
return (RTLoaderConstraint*)(address(this) + loader_constraints_offset());
}
RTLoaderConstraint* loader_constraint_at(int i) {
check_loader_constraint_offset(i);
return loader_constraints() + i;
}
static u4 object_delta_u4(Symbol* sym) {
if (DynamicDumpSharedSpaces) {
sym = DynamicArchive::original_to_target(sym);
}
return MetaspaceShared::object_delta_u4(sym);
}
void init(DumpTimeSharedClassInfo& info) {
_klass = info._klass;
if (!SystemDictionaryShared::is_builtin(_klass)) {
CrcInfo* c = crc();
c->_clsfile_size = info._clsfile_size;
c->_clsfile_crc32 = info._clsfile_crc32;
}
_num_verifier_constraints = info.num_verifier_constraints();
_num_loader_constraints = info.num_loader_constraints();
int i;
if (_num_verifier_constraints > 0) {
RTVerifierConstraint* vf_constraints = verifier_constraints();
char* flags = verifier_constraint_flags();
for (i = 0; i < _num_verifier_constraints; i++) {
vf_constraints[i]._name = object_delta_u4(info._verifier_constraints->at(i)._name);
vf_constraints[i]._from_name = object_delta_u4(info._verifier_constraints->at(i)._from_name);
}
for (i = 0; i < _num_verifier_constraints; i++) {
flags[i] = info._verifier_constraint_flags->at(i);
}
}
if (_num_loader_constraints > 0) {
RTLoaderConstraint* ld_constraints = loader_constraints();
for (i = 0; i < _num_loader_constraints; i++) {
ld_constraints[i]._name = object_delta_u4(info._loader_constraints->at(i)._name);
ld_constraints[i]._loader_type1 = info._loader_constraints->at(i)._loader_type1;
ld_constraints[i]._loader_type2 = info._loader_constraints->at(i)._loader_type2;
}
}
if (DynamicDumpSharedSpaces) {
if (_klass->is_hidden()) {
Thread* THREAD = Thread::current();
InstanceKlass* n_h = _klass->nest_host(THREAD);
n_h = DynamicArchive::original_to_target(n_h);
set_nest_host(n_h);
}
_klass = DynamicArchive::original_to_target(info._klass);
}
ArchivePtrMarker::mark_pointer(&_klass);
}
bool matches(int clsfile_size, int clsfile_crc32) const {
return crc()->_clsfile_size == clsfile_size &&
crc()->_clsfile_crc32 == clsfile_crc32;
}
char verifier_constraint_flag(int i) {
check_verifier_constraint_offset(i);
return verifier_constraint_flags()[i];
}
private:
// ArchiveCompactor::allocate() has reserved a pointer immediately before
// archived InstanceKlasses. We can use this slot to do a quick
// lookup of InstanceKlass* -> RunTimeSharedClassInfo* without
// building a new hashtable.
//
// info_pointer_addr(klass) --> 0x0100 RunTimeSharedClassInfo*
// InstanceKlass* klass --> 0x0108 <C++ vtbl>
// 0x0110 fields from Klass ...
static RunTimeSharedClassInfo** info_pointer_addr(InstanceKlass* klass) {
return &((RunTimeSharedClassInfo**)klass)[-1];
}
public:
static RunTimeSharedClassInfo* get_for(InstanceKlass* klass) {
assert(klass->is_shared(), "don't call for non-shared class");
return *info_pointer_addr(klass);
}
static void set_for(InstanceKlass* klass, RunTimeSharedClassInfo* record) {
if (DynamicDumpSharedSpaces) {
klass = DynamicArchive::original_to_buffer(klass);
*info_pointer_addr(klass) = DynamicArchive::buffer_to_target(record);
} else {
*info_pointer_addr(klass) = record;
}
ArchivePtrMarker::mark_pointer(info_pointer_addr(klass));
}
// Used by RunTimeSharedDictionary to implement OffsetCompactHashtable::EQUALS
static inline bool EQUALS(
const RunTimeSharedClassInfo* value, Symbol* key, int len_unused) {
return (value->_klass->name() == key);
}
};
class RunTimeSharedDictionary : public OffsetCompactHashtable<
Symbol*,
const RunTimeSharedClassInfo*,
RunTimeSharedClassInfo::EQUALS> {};
static DumpTimeSharedClassTable* _dumptime_table = NULL;
// SystemDictionaries in the base layer static archive
static RunTimeSharedDictionary _builtin_dictionary;
static RunTimeSharedDictionary _unregistered_dictionary;
// SystemDictionaries in the top layer dynamic archive
static RunTimeSharedDictionary _dynamic_builtin_dictionary;
static RunTimeSharedDictionary _dynamic_unregistered_dictionary;
oop SystemDictionaryShared::shared_protection_domain(int index) {
return ((objArrayOop)_shared_protection_domains.resolve())->obj_at(index);
}
oop SystemDictionaryShared::shared_jar_url(int index) {
return ((objArrayOop)_shared_jar_urls.resolve())->obj_at(index);
}
oop SystemDictionaryShared::shared_jar_manifest(int index) {
return ((objArrayOop)_shared_jar_manifests.resolve())->obj_at(index);
}
Handle SystemDictionaryShared::get_shared_jar_manifest(int shared_path_index, TRAPS) {
Handle manifest ;
if (shared_jar_manifest(shared_path_index) == NULL) {
SharedClassPathEntry* ent = FileMapInfo::shared_path(shared_path_index);
long size = ent->manifest_size();
if (size <= 0) {
return Handle();
}
// ByteArrayInputStream bais = new ByteArrayInputStream(buf);
const char* src = ent->manifest();
assert(src != NULL, "No Manifest data");
typeArrayOop buf = oopFactory::new_byteArray(size, CHECK_NH);
typeArrayHandle bufhandle(THREAD, buf);
ArrayAccess<>::arraycopy_from_native(reinterpret_cast<const jbyte*>(src),
buf, typeArrayOopDesc::element_offset<jbyte>(0), size);
Handle bais = JavaCalls::construct_new_instance(SystemDictionary::ByteArrayInputStream_klass(),
vmSymbols::byte_array_void_signature(),
bufhandle, CHECK_NH);
// manifest = new Manifest(bais)
manifest = JavaCalls::construct_new_instance(SystemDictionary::Jar_Manifest_klass(),
vmSymbols::input_stream_void_signature(),
bais, CHECK_NH);
atomic_set_shared_jar_manifest(shared_path_index, manifest());
}
manifest = Handle(THREAD, shared_jar_manifest(shared_path_index));
assert(manifest.not_null(), "sanity");
return manifest;
}
Handle SystemDictionaryShared::get_shared_jar_url(int shared_path_index, TRAPS) {
Handle url_h;
if (shared_jar_url(shared_path_index) == NULL) {
JavaValue result(T_OBJECT);
const char* path = FileMapInfo::shared_path_name(shared_path_index);
Handle path_string = java_lang_String::create_from_str(path, CHECK_(url_h));
Klass* classLoaders_klass =
SystemDictionary::jdk_internal_loader_ClassLoaders_klass();
JavaCalls::call_static(&result, classLoaders_klass,
vmSymbols::toFileURL_name(),
vmSymbols::toFileURL_signature(),
path_string, CHECK_(url_h));
atomic_set_shared_jar_url(shared_path_index, (oop)result.get_jobject());
}
url_h = Handle(THREAD, shared_jar_url(shared_path_index));
assert(url_h.not_null(), "sanity");
return url_h;
}
Handle SystemDictionaryShared::get_package_name(Symbol* class_name, TRAPS) {
ResourceMark rm(THREAD);
Handle pkgname_string;
TempNewSymbol pkg = ClassLoader::package_from_class_name(class_name);
if (pkg != NULL) { // Package prefix found
const char* pkgname = pkg->as_klass_external_name();
pkgname_string = java_lang_String::create_from_str(pkgname,
CHECK_(pkgname_string));
}
return pkgname_string;
}
// Define Package for shared app classes from JAR file and also checks for
// package sealing (all done in Java code)
// See http://docs.oracle.com/javase/tutorial/deployment/jar/sealman.html
void SystemDictionaryShared::define_shared_package(Symbol* class_name,
Handle class_loader,
Handle manifest,
Handle url,
TRAPS) {
assert(SystemDictionary::is_system_class_loader(class_loader()), "unexpected class loader");
// get_package_name() returns a NULL handle if the class is in unnamed package
Handle pkgname_string = get_package_name(class_name, CHECK);
if (pkgname_string.not_null()) {
Klass* app_classLoader_klass = SystemDictionary::jdk_internal_loader_ClassLoaders_AppClassLoader_klass();
JavaValue result(T_OBJECT);
JavaCallArguments args(3);
args.set_receiver(class_loader);
args.push_oop(pkgname_string);
args.push_oop(manifest);
args.push_oop(url);
JavaCalls::call_virtual(&result, app_classLoader_klass,
vmSymbols::defineOrCheckPackage_name(),
vmSymbols::defineOrCheckPackage_signature(),
&args,
CHECK);
}
}
// Get the ProtectionDomain associated with the CodeSource from the classloader.
Handle SystemDictionaryShared::get_protection_domain_from_classloader(Handle class_loader,
Handle url, TRAPS) {
// CodeSource cs = new CodeSource(url, null);
Handle cs = JavaCalls::construct_new_instance(SystemDictionary::CodeSource_klass(),
vmSymbols::url_code_signer_array_void_signature(),
url, Handle(), CHECK_NH);
// protection_domain = SecureClassLoader.getProtectionDomain(cs);
Klass* secureClassLoader_klass = SystemDictionary::SecureClassLoader_klass();
JavaValue obj_result(T_OBJECT);
JavaCalls::call_virtual(&obj_result, class_loader, secureClassLoader_klass,
vmSymbols::getProtectionDomain_name(),
vmSymbols::getProtectionDomain_signature(),
cs, CHECK_NH);
return Handle(THREAD, (oop)obj_result.get_jobject());
}
// Returns the ProtectionDomain associated with the JAR file identified by the url.
Handle SystemDictionaryShared::get_shared_protection_domain(Handle class_loader,
int shared_path_index,
Handle url,
TRAPS) {
Handle protection_domain;
if (shared_protection_domain(shared_path_index) == NULL) {
Handle pd = get_protection_domain_from_classloader(class_loader, url, THREAD);
atomic_set_shared_protection_domain(shared_path_index, pd());
}
// Acquire from the cache because if another thread beats the current one to
// set the shared protection_domain and the atomic_set fails, the current thread
// needs to get the updated protection_domain from the cache.
protection_domain = Handle(THREAD, shared_protection_domain(shared_path_index));
assert(protection_domain.not_null(), "sanity");
return protection_domain;
}
// Returns the ProtectionDomain associated with the moduleEntry.
Handle SystemDictionaryShared::get_shared_protection_domain(Handle class_loader,
ModuleEntry* mod, TRAPS) {
ClassLoaderData *loader_data = mod->loader_data();
if (mod->shared_protection_domain() == NULL) {
Symbol* location = mod->location();
if (location != NULL) {
Handle location_string = java_lang_String::create_from_symbol(
location, CHECK_NH);
Handle url;
JavaValue result(T_OBJECT);
if (location->starts_with("jrt:/")) {
url = JavaCalls::construct_new_instance(SystemDictionary::URL_klass(),
vmSymbols::string_void_signature(),
location_string, CHECK_NH);
} else {
Klass* classLoaders_klass =
SystemDictionary::jdk_internal_loader_ClassLoaders_klass();
JavaCalls::call_static(&result, classLoaders_klass, vmSymbols::toFileURL_name(),
vmSymbols::toFileURL_signature(),
location_string, CHECK_NH);
url = Handle(THREAD, (oop)result.get_jobject());
}
Handle pd = get_protection_domain_from_classloader(class_loader, url,
CHECK_NH);
mod->set_shared_protection_domain(loader_data, pd);
}
}
Handle protection_domain(THREAD, mod->shared_protection_domain());
assert(protection_domain.not_null(), "sanity");
return protection_domain;
}
// Initializes the java.lang.Package and java.security.ProtectionDomain objects associated with
// the given InstanceKlass.
// Returns the ProtectionDomain for the InstanceKlass.
Handle SystemDictionaryShared::init_security_info(Handle class_loader, InstanceKlass* ik, PackageEntry* pkg_entry, TRAPS) {
Handle pd;
if (ik != NULL) {
int index = ik->shared_classpath_index();
assert(index >= 0, "Sanity");
SharedClassPathEntry* ent = FileMapInfo::shared_path(index);
Symbol* class_name = ik->name();
if (ent->is_modules_image()) {
// For shared app/platform classes originated from the run-time image:
// The ProtectionDomains are cached in the corresponding ModuleEntries
// for fast access by the VM.
// all packages from module image are already created during VM bootstrap in
// Modules::define_module().
assert(pkg_entry != NULL, "archived class in module image cannot be from unnamed package");
ModuleEntry* mod_entry = pkg_entry->module();
pd = get_shared_protection_domain(class_loader, mod_entry, THREAD);
} else {
// For shared app/platform classes originated from JAR files on the class path:
// Each of the 3 SystemDictionaryShared::_shared_xxx arrays has the same length
// as the shared classpath table in the shared archive (see
// FileMap::_shared_path_table in filemap.hpp for details).
//
// If a shared InstanceKlass k is loaded from the class path, let
//
// index = k->shared_classpath_index():
//
// FileMap::_shared_path_table[index] identifies the JAR file that contains k.
//
// k's protection domain is:
//
// ProtectionDomain pd = _shared_protection_domains[index];
//
// and k's Package is initialized using
//
// manifest = _shared_jar_manifests[index];
// url = _shared_jar_urls[index];
// define_shared_package(class_name, class_loader, manifest, url, CHECK_(pd));
//
// Note that if an element of these 3 _shared_xxx arrays is NULL, it will be initialized by
// the corresponding SystemDictionaryShared::get_shared_xxx() function.
Handle manifest = get_shared_jar_manifest(index, CHECK_(pd));
Handle url = get_shared_jar_url(index, CHECK_(pd));
int index_offset = index - ClassLoaderExt::app_class_paths_start_index();
if (index_offset < PackageEntry::max_index_for_defined_in_class_path()) {
if (pkg_entry == NULL || !pkg_entry->is_defined_by_cds_in_class_path(index_offset)) {
// define_shared_package only needs to be called once for each package in a jar specified
// in the shared class path.
define_shared_package(class_name, class_loader, manifest, url, CHECK_(pd));
if (pkg_entry != NULL) {
pkg_entry->set_defined_by_cds_in_class_path(index_offset);
}
}
} else {
define_shared_package(class_name, class_loader, manifest, url, CHECK_(pd));
}
pd = get_shared_protection_domain(class_loader, index, url, CHECK_(pd));
}
}
return pd;
}
bool SystemDictionaryShared::is_sharing_possible(ClassLoaderData* loader_data) {
oop class_loader = loader_data->class_loader();
return (class_loader == NULL ||
SystemDictionary::is_system_class_loader(class_loader) ||
SystemDictionary::is_platform_class_loader(class_loader));
}
bool SystemDictionaryShared::has_platform_or_app_classes() {
if (FileMapInfo::current_info()->has_platform_or_app_classes()) {
return true;
}
if (DynamicArchive::is_mapped() &&
FileMapInfo::dynamic_info()->has_platform_or_app_classes()) {
return true;
}
return false;
}
// The following stack shows how this code is reached:
//
// [0] SystemDictionaryShared::find_or_load_shared_class()
// [1] JVM_FindLoadedClass
// [2] java.lang.ClassLoader.findLoadedClass0()
// [3] java.lang.ClassLoader.findLoadedClass()
// [4] jdk.internal.loader.BuiltinClassLoader.loadClassOrNull()
// [5] jdk.internal.loader.BuiltinClassLoader.loadClass()
// [6] jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(), or
// jdk.internal.loader.ClassLoaders$PlatformClassLoader.loadClass()
//
// AppCDS supports fast class loading for these 2 built-in class loaders:
// jdk.internal.loader.ClassLoaders$PlatformClassLoader
// jdk.internal.loader.ClassLoaders$AppClassLoader
// with the following assumptions (based on the JDK core library source code):
//
// [a] these two loaders use the BuiltinClassLoader.loadClassOrNull() to
// load the named class.
// [b] BuiltinClassLoader.loadClassOrNull() first calls findLoadedClass(name).
// [c] At this point, if we can find the named class inside the
// shared_dictionary, we can perform further checks (see
// SystemDictionary::is_shared_class_visible) to ensure that this class
// was loaded by the same class loader during dump time.
//
// Given these assumptions, we intercept the findLoadedClass() call to invoke
// SystemDictionaryShared::find_or_load_shared_class() to load the shared class from
// the archive for the 2 built-in class loaders. This way,
// we can improve start-up because we avoid decoding the classfile,
// and avoid delegating to the parent loader.
//
// NOTE: there's a lot of assumption about the Java code. If any of that change, this
// needs to be redesigned.
InstanceKlass* SystemDictionaryShared::find_or_load_shared_class(
Symbol* name, Handle class_loader, TRAPS) {
InstanceKlass* k = NULL;
if (UseSharedSpaces) {
if (!has_platform_or_app_classes()) {
return NULL;
}
if (SystemDictionary::is_system_class_loader(class_loader()) ||
SystemDictionary::is_platform_class_loader(class_loader())) {
// Fix for 4474172; see evaluation for more details
class_loader = Handle(
THREAD, java_lang_ClassLoader::non_reflection_class_loader(class_loader()));
ClassLoaderData *loader_data = register_loader(class_loader);
Dictionary* dictionary = loader_data->dictionary();
unsigned int d_hash = dictionary->compute_hash(name);
bool DoObjectLock = true;
if (is_parallelCapable(class_loader)) {
DoObjectLock = false;
}
// Make sure we are synchronized on the class loader before we proceed
//
// Note: currently, find_or_load_shared_class is called only from
// JVM_FindLoadedClass and used for PlatformClassLoader and AppClassLoader,
// which are parallel-capable loaders, so this lock is NOT taken.
Handle lockObject = compute_loader_lock_object(class_loader, THREAD);
check_loader_lock_contention(lockObject, THREAD);
ObjectLocker ol(lockObject, THREAD, DoObjectLock);
{
MutexLocker mu(THREAD, SystemDictionary_lock);
InstanceKlass* check = find_class(d_hash, name, dictionary);
if (check != NULL) {
return check;
}
}
k = load_shared_class_for_builtin_loader(name, class_loader, THREAD);
if (k != NULL) {
define_instance_class(k, CHECK_NULL);
}
}
}
return k;
}
PackageEntry* SystemDictionaryShared::get_package_entry_from_class_name(Handle class_loader, Symbol* class_name) {
PackageEntry* pkg_entry = NULL;
TempNewSymbol pkg_name = ClassLoader::package_from_class_name(class_name);
if (pkg_name != NULL) {
pkg_entry = class_loader_data(class_loader)->packages()->lookup_only(pkg_name);
}
return pkg_entry;
}
InstanceKlass* SystemDictionaryShared::load_shared_class_for_builtin_loader(
Symbol* class_name, Handle class_loader, TRAPS) {
assert(UseSharedSpaces, "must be");
InstanceKlass* ik = find_builtin_class(class_name);
if (ik != NULL) {
if ((ik->is_shared_app_class() &&
SystemDictionary::is_system_class_loader(class_loader())) ||
(ik->is_shared_platform_class() &&
SystemDictionary::is_platform_class_loader(class_loader()))) {
PackageEntry* pkg_entry = get_package_entry_from_class_name(class_loader, class_name);
Handle protection_domain =
SystemDictionaryShared::init_security_info(class_loader, ik, pkg_entry, CHECK_NULL);
return load_shared_class(ik, class_loader, protection_domain, NULL, pkg_entry, THREAD);
}
}
return NULL;
}
void SystemDictionaryShared::allocate_shared_protection_domain_array(int size, TRAPS) {
if (_shared_protection_domains.resolve() == NULL) {
oop spd = oopFactory::new_objArray(
SystemDictionary::ProtectionDomain_klass(), size, CHECK);
_shared_protection_domains = OopHandle(Universe::vm_global(), spd);
}
}
void SystemDictionaryShared::allocate_shared_jar_url_array(int size, TRAPS) {
if (_shared_jar_urls.resolve() == NULL) {
oop sju = oopFactory::new_objArray(
SystemDictionary::URL_klass(), size, CHECK);
_shared_jar_urls = OopHandle(Universe::vm_global(), sju);
}
}
void SystemDictionaryShared::allocate_shared_jar_manifest_array(int size, TRAPS) {
if (_shared_jar_manifests.resolve() == NULL) {
oop sjm = oopFactory::new_objArray(
SystemDictionary::Jar_Manifest_klass(), size, CHECK);
_shared_jar_manifests = OopHandle(Universe::vm_global(), sjm);
}
}
void SystemDictionaryShared::allocate_shared_data_arrays(int size, TRAPS) {
allocate_shared_protection_domain_array(size, CHECK);
allocate_shared_jar_url_array(size, CHECK);
allocate_shared_jar_manifest_array(size, CHECK);
}
// This function is called for loading only UNREGISTERED classes
InstanceKlass* SystemDictionaryShared::lookup_from_stream(Symbol* class_name,
Handle class_loader,
Handle protection_domain,
const ClassFileStream* cfs,
TRAPS) {
if (!UseSharedSpaces) {
return NULL;
}
if (class_name == NULL) { // don't do this for hidden and unsafe anonymous classes
return NULL;
}
if (class_loader.is_null() ||
SystemDictionary::is_system_class_loader(class_loader()) ||
SystemDictionary::is_platform_class_loader(class_loader())) {
// Do nothing for the BUILTIN loaders.
return NULL;
}
const RunTimeSharedClassInfo* record = find_record(&_unregistered_dictionary, &_dynamic_unregistered_dictionary, class_name);
if (record == NULL) {
return NULL;
}
int clsfile_size = cfs->length();
int clsfile_crc32 = ClassLoader::crc32(0, (const char*)cfs->buffer(), cfs->length());
if (!record->matches(clsfile_size, clsfile_crc32)) {
return NULL;
}
return acquire_class_for_current_thread(record->_klass, class_loader,
protection_domain, cfs,
THREAD);
}
InstanceKlass* SystemDictionaryShared::acquire_class_for_current_thread(
InstanceKlass *ik,
Handle class_loader,
Handle protection_domain,
const ClassFileStream *cfs,
TRAPS) {
ClassLoaderData* loader_data = ClassLoaderData::class_loader_data(class_loader());
{
MutexLocker mu(THREAD, SharedDictionary_lock);
if (ik->class_loader_data() != NULL) {
// ik is already loaded (by this loader or by a different loader)
// or ik is being loaded by a different thread (by this loader or by a different loader)
return NULL;
}
// No other thread has acquired this yet, so give it to *this thread*
ik->set_class_loader_data(loader_data);
}
// No longer holding SharedDictionary_lock
// No need to lock, as <ik> can be held only by a single thread.
loader_data->add_class(ik);
// Get the package entry.
PackageEntry* pkg_entry = get_package_entry_from_class_name(class_loader, ik->name());
// Load and check super/interfaces, restore unsharable info
InstanceKlass* shared_klass = load_shared_class(ik, class_loader, protection_domain,
cfs, pkg_entry, THREAD);
if (shared_klass == NULL || HAS_PENDING_EXCEPTION) {
// TODO: clean up <ik> so it can be used again
return NULL;
}
return shared_klass;
}
static ResourceHashtable<
Symbol*, bool,
primitive_hash<Symbol*>,
primitive_equals<Symbol*>,
6661, // prime number
ResourceObj::C_HEAP> _loaded_unregistered_classes;
bool SystemDictionaryShared::add_unregistered_class(InstanceKlass* k, TRAPS) {
// We don't allow duplicated unregistered classes of the same name.
assert(DumpSharedSpaces, "only when dumping");
Symbol* name = k->name();
bool created = false;
_loaded_unregistered_classes.put_if_absent(name, true, &created);
if (created) {
MutexLocker mu_r(THREAD, Compile_lock); // add_to_hierarchy asserts this.
SystemDictionary::add_to_hierarchy(k, CHECK_false);
}
return created;
}
// This function is called to resolve the super/interfaces of shared classes for
// non-built-in loaders. E.g., ChildClass in the below example
// where "super:" (and optionally "interface:") have been specified.
//
// java/lang/Object id: 0
// Interface id: 2 super: 0 source: cust.jar
// ChildClass id: 4 super: 0 interfaces: 2 source: cust.jar
InstanceKlass* SystemDictionaryShared::dump_time_resolve_super_or_fail(
Symbol* child_name, Symbol* class_name, Handle class_loader,
Handle protection_domain, bool is_superclass, TRAPS) {
assert(DumpSharedSpaces, "only when dumping");
ClassListParser* parser = ClassListParser::instance();
if (parser == NULL) {
// We're still loading the well-known classes, before the ClassListParser is created.
return NULL;
}
if (child_name->equals(parser->current_class_name())) {
// When this function is called, all the numbered super and interface types
// must have already been loaded. Hence this function is never recursively called.
if (is_superclass) {
return parser->lookup_super_for_current_class(class_name);
} else {
return parser->lookup_interface_for_current_class(class_name);
}
} else {
// The VM is not trying to resolve a super type of parser->current_class_name().
// Instead, it's resolving an error class (because parser->current_class_name() has
// failed parsing or verification). Don't do anything here.
return NULL;
}
}
DumpTimeSharedClassInfo* SystemDictionaryShared::find_or_allocate_info_for(InstanceKlass* k) {
MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
if (_dumptime_table == NULL) {
_dumptime_table = new (ResourceObj::C_HEAP, mtClass)DumpTimeSharedClassTable();
}
return _dumptime_table->find_or_allocate_info_for(k);
}
void SystemDictionaryShared::set_shared_class_misc_info(InstanceKlass* k, ClassFileStream* cfs) {
Arguments::assert_is_dumping_archive();
assert(!is_builtin(k), "must be unregistered class");
DumpTimeSharedClassInfo* info = find_or_allocate_info_for(k);
info->_clsfile_size = cfs->length();
info->_clsfile_crc32 = ClassLoader::crc32(0, (const char*)cfs->buffer(), cfs->length());
}
void SystemDictionaryShared::init_dumptime_info(InstanceKlass* k) {
(void)find_or_allocate_info_for(k);
}
void SystemDictionaryShared::remove_dumptime_info(InstanceKlass* k) {
MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
DumpTimeSharedClassInfo* p = _dumptime_table->get(k);
if (p == NULL) {
return;
}
if (p->_verifier_constraints != NULL) {
for (int i = 0; i < p->_verifier_constraints->length(); i++) {
DumpTimeSharedClassInfo::DTVerifierConstraint constraint = p->_verifier_constraints->at(i);
if (constraint._name != NULL ) {
constraint._name->decrement_refcount();
}
if (constraint._from_name != NULL ) {
constraint._from_name->decrement_refcount();
}
}
FREE_C_HEAP_ARRAY(DumpTimeSharedClassInfo::DTVerifierConstraint, p->_verifier_constraints);
p->_verifier_constraints = NULL;
FREE_C_HEAP_ARRAY(char, p->_verifier_constraint_flags);
p->_verifier_constraint_flags = NULL;
}
if (p->_loader_constraints != NULL) {
for (int i = 0; i < p->_loader_constraints->length(); i++) {
DumpTimeSharedClassInfo::DTLoaderConstraint ld = p->_loader_constraints->at(i);
if (ld._name != NULL) {
ld._name->decrement_refcount();
}
}
FREE_C_HEAP_ARRAY(DumpTimeSharedClassInfo::DTLoaderConstraint, p->_loader_constraints);
p->_loader_constraints = NULL;
}
_dumptime_table->remove(k);
}
bool SystemDictionaryShared::is_jfr_event_class(InstanceKlass *k) {
while (k) {
if (k->name()->equals("jdk/internal/event/Event")) {
return true;
}
k = k->java_super();
}
return false;
}
bool SystemDictionaryShared::is_registered_lambda_proxy_class(InstanceKlass* ik) {
DumpTimeSharedClassInfo* info = _dumptime_table->get(ik);
return (info != NULL) ? info->_is_archived_lambda_proxy : false;
}
bool SystemDictionaryShared::is_hidden_lambda_proxy(InstanceKlass* ik) {
assert(ik->is_shared(), "applicable to only a shared class");
if (ik->is_hidden()) {
return true;
} else {
return false;
}
}
void SystemDictionaryShared::warn_excluded(InstanceKlass* k, const char* reason) {
ResourceMark rm;
log_warning(cds)("Skipping %s: %s", k->name()->as_C_string(), reason);
}
bool SystemDictionaryShared::should_be_excluded(InstanceKlass* k) {
if (k->is_unsafe_anonymous()) {
warn_excluded(k, "Unsafe anonymous class");
return true; // unsafe anonymous classes are not archived, skip
}
if (k->is_in_error_state()) {
warn_excluded(k, "In error state");
return true;
}
if (k->has_been_redefined()) {
warn_excluded(k, "Has been redefined");
return true;
}
if (!k->is_hidden() && k->shared_classpath_index() < 0 && is_builtin(k)) {
// These are classes loaded from unsupported locations (such as those loaded by JVMTI native
// agent during dump time).
warn_excluded(k, "Unsupported location");
return true;
}
if (k->signers() != NULL) {
// We cannot include signed classes in the archive because the certificates
// used during dump time may be different than those used during
// runtime (due to expiration, etc).
warn_excluded(k, "Signed JAR");
return true;
}
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.
warn_excluded(k, "JFR event class");
return true;
}
if (k->init_state() < InstanceKlass::linked) {
// In CDS dumping, we will attempt to link all classes. Those that fail to link will
// be recorded in DumpTimeSharedClassInfo.
Arguments::assert_is_dumping_archive();
// TODO -- rethink how this can be handled.
// We should try to link ik, however, we can't do it here because
// 1. We are at VM exit
// 2. linking a class may cause other classes to be loaded, which means
// a custom ClassLoader.loadClass() may be called, at a point where the
// class loader doesn't expect it.
if (has_class_failed_verification(k)) {
warn_excluded(k, "Failed verification");
} else {
warn_excluded(k, "Not linked");
}
return true;
}
if (k->major_version() < 50 /*JAVA_6_VERSION*/) {
ResourceMark rm;
log_warning(cds)("Pre JDK 6 class not supported by CDS: %u.%u %s",
k->major_version(), k->minor_version(), k->name()->as_C_string());
return true;
}
InstanceKlass* super = k->java_super();
if (super != NULL && should_be_excluded(super)) {
ResourceMark rm;
log_warning(cds)("Skipping %s: super class %s is excluded", k->name()->as_C_string(), super->name()->as_C_string());
return true;
}
if (k->is_hidden() && !is_registered_lambda_proxy_class(k)) {
warn_excluded(k, "Hidden class");
return true;
}
Array<InstanceKlass*>* interfaces = k->local_interfaces();
int len = interfaces->length();
for (int i = 0; i < len; i++) {
InstanceKlass* intf = interfaces->at(i);
if (should_be_excluded(intf)) {
log_warning(cds)("Skipping %s: interface %s is excluded", k->name()->as_C_string(), intf->name()->as_C_string());
return true;
}
}
return false;
}
// k is a class before relocating by ArchiveCompactor
void SystemDictionaryShared::validate_before_archiving(InstanceKlass* k) {
ResourceMark rm;
const char* name = k->name()->as_C_string();
DumpTimeSharedClassInfo* info = _dumptime_table->get(k);
assert(_no_class_loading_should_happen, "class loading must be disabled");
guarantee(info != NULL, "Class %s must be entered into _dumptime_table", name);
guarantee(!info->is_excluded(), "Should not attempt to archive excluded class %s", name);
if (is_builtin(k)) {
if (k->is_hidden()) {
assert(is_registered_lambda_proxy_class(k), "unexpected hidden class %s", name);
}
guarantee(!k->is_shared_unregistered_class(),
"Class loader type must be set for BUILTIN class %s", name);
} else {
guarantee(k->is_shared_unregistered_class(),
"Class loader type must not be set for UNREGISTERED class %s", name);
}
}
class ExcludeDumpTimeSharedClasses : StackObj {
public:
bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
if (SystemDictionaryShared::should_be_excluded(k)) {
info.set_excluded();
}
return true; // keep on iterating
}
};
void SystemDictionaryShared::check_excluded_classes() {
ExcludeDumpTimeSharedClasses excl;
_dumptime_table->iterate(&excl);
_dumptime_table->update_counts();
}
bool SystemDictionaryShared::is_excluded_class(InstanceKlass* k) {
assert(_no_class_loading_should_happen, "sanity");
Arguments::assert_is_dumping_archive();
return find_or_allocate_info_for(k)->is_excluded();
}
void SystemDictionaryShared::set_class_has_failed_verification(InstanceKlass* ik) {
Arguments::assert_is_dumping_archive();
find_or_allocate_info_for(ik)->set_failed_verification();
}
bool SystemDictionaryShared::has_class_failed_verification(InstanceKlass* ik) {
Arguments::assert_is_dumping_archive();
if (_dumptime_table == NULL) {
assert(DynamicDumpSharedSpaces, "sanity");
assert(ik->is_shared(), "must be a shared class in the static archive");
return false;
}
DumpTimeSharedClassInfo* p = _dumptime_table->get(ik);
return (p == NULL) ? false : p->failed_verification();
}
class IterateDumpTimeSharedClassTable : StackObj {
MetaspaceClosure *_it;
public:
IterateDumpTimeSharedClassTable(MetaspaceClosure* it) : _it(it) {}
bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
if (!info.is_excluded()) {
info.metaspace_pointers_do(_it);
}
return true; // keep on iterating
}
};
void SystemDictionaryShared::dumptime_classes_do(class MetaspaceClosure* it) {
IterateDumpTimeSharedClassTable iter(it);
_dumptime_table->iterate(&iter);
}
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) {
Arguments::assert_is_dumping_archive();
DumpTimeSharedClassInfo* info = find_or_allocate_info_for(k);
info->add_verification_constraint(k, name, from_name, from_field_is_protected,
from_is_array, from_is_object);
if (DynamicDumpSharedSpaces) {
// For dynamic dumping, we can resolve all the constraint classes for all class loaders during
// the initial run prior to creating the archive before vm exit. We will also perform verification
// check when running with the archive.
return false;
} else {
if (is_builtin(k)) {
// For builtin class loaders, we can try to complete the verification check at dump time,
// because we can resolve all the constraint classes. We will also perform verification check
// when running with the archive.
return false;
} else {
// For non-builtin class loaders, we cannot complete the verification check at dump time,
// because at dump time we don't know how to resolve classes for such loaders.
return true;
}
}
}
void DumpTimeSharedClassInfo::add_verification_constraint(InstanceKlass* k, Symbol* name,
Symbol* from_name, bool from_field_is_protected, bool from_is_array, bool from_is_object) {
if (_verifier_constraints == NULL) {
_verifier_constraints = new(ResourceObj::C_HEAP, mtClass) GrowableArray<DTVerifierConstraint>(4, mtClass);
}
if (_verifier_constraint_flags == NULL) {
_verifier_constraint_flags = new(ResourceObj::C_HEAP, mtClass) GrowableArray<char>(4, mtClass);
}
GrowableArray<DTVerifierConstraint>* vc_array = _verifier_constraints;
for (int i = 0; i < vc_array->length(); i++) {
DTVerifierConstraint* p = vc_array->adr_at(i);
if (name == p->_name && from_name == p->_from_name) {
return;
}
}
DTVerifierConstraint cons(name, from_name);
vc_array->append(cons);
GrowableArray<char>* vcflags_array = _verifier_constraint_flags;
char c = 0;
c |= from_field_is_protected ? SystemDictionaryShared::FROM_FIELD_IS_PROTECTED : 0;
c |= from_is_array ? SystemDictionaryShared::FROM_IS_ARRAY : 0;
c |= from_is_object ? SystemDictionaryShared::FROM_IS_OBJECT : 0;
vcflags_array->append(c);
if (log_is_enabled(Trace, cds, verification)) {
ResourceMark rm;
log_trace(cds, verification)("add_verification_constraint: %s: %s must be subclass of %s [0x%x] array len %d flags len %d",
k->external_name(), from_name->as_klass_external_name(),
name->as_klass_external_name(), c, vc_array->length(), vcflags_array->length());
}
}
void SystemDictionaryShared::add_lambda_proxy_class(InstanceKlass* caller_ik,
InstanceKlass* lambda_ik,
Symbol* invoked_name,
Symbol* invoked_type,
Symbol* method_type,
Method* member_method,
Symbol* instantiated_method_type) {
assert(caller_ik->class_loader() == lambda_ik->class_loader(), "mismatched class loader");
assert(caller_ik->class_loader_data() == lambda_ik->class_loader_data(), "mismatched class loader data");
assert(java_lang_Class::class_data(lambda_ik->java_mirror()) == NULL, "must not have class data");
MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
lambda_ik->assign_class_loader_type();
lambda_ik->set_shared_classpath_index(caller_ik->shared_classpath_index());
DumpTimeSharedClassInfo* info = _dumptime_table->get(lambda_ik);
if (info != NULL && !lambda_ik->is_non_strong_hidden() && is_builtin(lambda_ik) && is_builtin(caller_ik)) {
// Set _is_archived_lambda_proxy in DumpTimeSharedClassInfo so that the lambda_ik
// won't be excluded during dumping of shared archive. See ExcludeDumpTimeSharedClasses.
info->_is_archived_lambda_proxy = true;
LambdaProxyClassKey key(caller_ik,
invoked_name,
invoked_type,
method_type,
member_method,
instantiated_method_type);
add_to_dump_time_lambda_proxy_class_dictionary(key, lambda_ik);
}
}
InstanceKlass* SystemDictionaryShared::get_shared_lambda_proxy_class(InstanceKlass* caller_ik,
Symbol* invoked_name,
Symbol* invoked_type,
Symbol* method_type,
Method* member_method,
Symbol* instantiated_method_type) {
MutexLocker ml(CDSLambda_lock, Mutex::_no_safepoint_check_flag);
LambdaProxyClassKey key(caller_ik, invoked_name, invoked_type,
method_type, member_method, instantiated_method_type);
const RunTimeLambdaProxyClassInfo* info = _lambda_proxy_class_dictionary.lookup(&key, key.hash(), 0);
InstanceKlass* proxy_klass = NULL;
if (info != NULL) {
InstanceKlass* curr_klass = info->proxy_klass_head();
InstanceKlass* prev_klass = curr_klass;
if (curr_klass->lambda_proxy_is_available()) {
while (curr_klass->next_link() != NULL) {
prev_klass = curr_klass;
curr_klass = InstanceKlass::cast(curr_klass->next_link());
}
assert(curr_klass->is_hidden(), "must be");
assert(curr_klass->lambda_proxy_is_available(), "must be");
prev_klass->set_next_link(NULL);
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());
}
} else {
if (log_is_enabled(Debug, cds)) {
ResourceMark rm;
log_debug(cds)("Used all archived lambda proxy classes for: %s %s%s",
caller_ik->external_name(), invoked_name->as_C_string(), invoked_type->as_C_string());
}
}
}
return proxy_klass;
}
InstanceKlass* SystemDictionaryShared::get_shared_nest_host(InstanceKlass* lambda_ik) {
assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only");
RunTimeSharedClassInfo* record = RunTimeSharedClassInfo::get_for(lambda_ik);
return record->nest_host();
}
InstanceKlass* SystemDictionaryShared::prepare_shared_lambda_proxy_class(InstanceKlass* lambda_ik,
InstanceKlass* caller_ik,
bool initialize, TRAPS) {
Handle class_loader(THREAD, caller_ik->class_loader());
Handle protection_domain;
PackageEntry* pkg_entry = get_package_entry_from_class_name(class_loader, caller_ik->name());
if (caller_ik->class_loader() != NULL) {
protection_domain = SystemDictionaryShared::init_security_info(class_loader, caller_ik, pkg_entry, CHECK_NULL);
}
InstanceKlass* shared_nest_host = get_shared_nest_host(lambda_ik);
assert(shared_nest_host != NULL, "unexpected NULL _nest_host");
InstanceKlass* loaded_lambda =
SystemDictionary::load_shared_lambda_proxy_class(lambda_ik, class_loader, protection_domain, pkg_entry, CHECK_NULL);
// Ensures the nest host is the same as the lambda proxy's
// nest host recorded at dump time.
InstanceKlass* nest_host = caller_ik->nest_host(THREAD);
assert(nest_host == shared_nest_host, "mismatched nest host");
EventClassLoad class_load_start_event;
{
MutexLocker mu_r(THREAD, Compile_lock);
// Add to class hierarchy, initialize vtables, and do possible
// deoptimizations.
SystemDictionary::add_to_hierarchy(loaded_lambda, CHECK_NULL); // No exception, but can block
// But, do not add to dictionary.
}
loaded_lambda->link_class(CHECK_NULL);
// notify jvmti
if (JvmtiExport::should_post_class_load()) {
assert(THREAD->is_Java_thread(), "thread->is_Java_thread()");
JvmtiExport::post_class_load((JavaThread *) THREAD, loaded_lambda);
}
if (class_load_start_event.should_commit()) {
SystemDictionary::post_class_load_event(&class_load_start_event, loaded_lambda, ClassLoaderData::class_loader_data(class_loader()));
}
if (initialize) {
loaded_lambda->initialize(CHECK_NULL);
}
return loaded_lambda;
}
static char get_loader_type_by(oop loader) {
assert(SystemDictionary::is_builtin_class_loader(loader), "Must be built-in loader");
if (SystemDictionary::is_boot_class_loader(loader)) {
return (char)ClassLoader::BOOT_LOADER;
} else if (SystemDictionary::is_platform_class_loader(loader)) {
return (char)ClassLoader::PLATFORM_LOADER;
} else {
assert(SystemDictionary::is_system_class_loader(loader), "Class loader mismatch");
return (char)ClassLoader::APP_LOADER;
}
}
static oop get_class_loader_by(char type) {
if (type == (char)ClassLoader::BOOT_LOADER) {
return (oop)NULL;
} else if (type == (char)ClassLoader::PLATFORM_LOADER) {
return SystemDictionary::java_platform_loader();
} else {
assert (type == (char)ClassLoader::APP_LOADER, "Sanity");
return SystemDictionary::java_system_loader();
}
}
void DumpTimeSharedClassInfo::record_linking_constraint(Symbol* name, Handle loader1, Handle loader2) {
assert(loader1 != loader2, "sanity");
LogTarget(Info, class, loader, constraints) log;
if (_loader_constraints == NULL) {
_loader_constraints = new (ResourceObj::C_HEAP, mtClass) GrowableArray<DTLoaderConstraint>(4, mtClass);
}
char lt1 = get_loader_type_by(loader1());
char lt2 = get_loader_type_by(loader2());
DTLoaderConstraint lc(name, lt1, lt2);
for (int i = 0; i < _loader_constraints->length(); i++) {
DTLoaderConstraint dt = _loader_constraints->at(i);
if (lc.equals(dt)) {
if (log.is_enabled()) {
ResourceMark rm;
// Use loader[0]/loader[1] to be consistent with the logs in loaderConstraints.cpp
log.print("[CDS record loader constraint for class: %s constraint_name: %s loader[0]: %s loader[1]: %s already added]",
_klass->external_name(), name->as_C_string(),
ClassLoaderData::class_loader_data(loader1())->loader_name_and_id(),
ClassLoaderData::class_loader_data(loader2())->loader_name_and_id());
}
return;
}
}
_loader_constraints->append(lc);
if (log.is_enabled()) {
ResourceMark rm;
// Use loader[0]/loader[1] to be consistent with the logs in loaderConstraints.cpp
log.print("[CDS record loader constraint for class: %s constraint_name: %s loader[0]: %s loader[1]: %s total %d]",
_klass->external_name(), name->as_C_string(),
ClassLoaderData::class_loader_data(loader1())->loader_name_and_id(),
ClassLoaderData::class_loader_data(loader2())->loader_name_and_id(),
_loader_constraints->length());
}
}
void SystemDictionaryShared::check_verification_constraints(InstanceKlass* klass,
TRAPS) {
assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only");
RunTimeSharedClassInfo* record = RunTimeSharedClassInfo::get_for(klass);
int length = record->_num_verifier_constraints;
if (length > 0) {
for (int i = 0; i < length; i++) {
RunTimeSharedClassInfo::RTVerifierConstraint* vc = record->verifier_constraint_at(i);
Symbol* name = vc->name();
Symbol* from_name = vc->from_name();
char c = record->verifier_constraint_flag(i);
if (log_is_enabled(Trace, cds, verification)) {
ResourceMark rm(THREAD);
log_trace(cds, verification)("check_verification_constraint: %s: %s must be subclass of %s [0x%x]",
klass->external_name(), from_name->as_klass_external_name(),
name->as_klass_external_name(), c);
}
bool from_field_is_protected = (c & SystemDictionaryShared::FROM_FIELD_IS_PROTECTED) ? true : false;
bool from_is_array = (c & SystemDictionaryShared::FROM_IS_ARRAY) ? true : false;
bool from_is_object = (c & SystemDictionaryShared::FROM_IS_OBJECT) ? true : false;
bool ok = VerificationType::resolve_and_check_assignability(klass, name,
from_name, from_field_is_protected, from_is_array, from_is_object, CHECK);
if (!ok) {
ResourceMark rm(THREAD);
stringStream ss;
ss.print_cr("Bad type on operand stack");
ss.print_cr("Exception Details:");
ss.print_cr(" Location:\n %s", klass->name()->as_C_string());
ss.print_cr(" Reason:\n Type '%s' is not assignable to '%s'",
from_name->as_quoted_ascii(), name->as_quoted_ascii());
THROW_MSG(vmSymbols::java_lang_VerifyError(), ss.as_string());
}
}
}
}
// Record class loader constraints that are checked inside
// InstanceKlass::link_class(), so that these can be checked quickly
// at runtime without laying out the vtable/itables.
void SystemDictionaryShared::record_linking_constraint(Symbol* name, InstanceKlass* klass,
Handle loader1, Handle loader2, TRAPS) {
// A linking constraint check is executed when:
// - klass extends or implements type S
// - klass overrides method S.M(...) with X.M
// - If klass defines the method M, X is
// the same as klass.
// - If klass does not define the method M,
// X must be a supertype of klass and X.M is
// a default method defined by X.
// - loader1 = X->class_loader()
// - loader2 = S->class_loader()
// - loader1 != loader2
// - M's paramater(s) include an object type T
// We require that
// - whenever loader1 and loader2 try to
// resolve the type T, they must always resolve to
// the same InstanceKlass.
// NOTE: type T may or may not be currently resolved in
// either of these two loaders. The check itself does not
// try to resolve T.
oop klass_loader = klass->class_loader();
assert(klass_loader != NULL, "should not be called for boot loader");
assert(loader1 != loader2, "must be");
if (!is_system_class_loader(klass_loader) &&
!is_platform_class_loader(klass_loader)) {
// If klass is loaded by system/platform loaders, we can
// guarantee that klass and S must be loaded by the same
// respective loader between dump time and run time, and
// the exact same check on (name, loader1, loader2) will
// be executed. Hence, we can cache this check and execute
// it at runtime without walking the vtable/itables.
//
// This cannot be guaranteed for classes loaded by other
// loaders, so we bail.
return;
}
if (THREAD->is_VM_thread()) {
assert(DynamicDumpSharedSpaces, "must be");
// We are re-laying out the vtable/itables of the *copy* of
// a class during the final stage of dynamic dumping. The
// linking constraints for this class has already been recorded.
return;
}
Arguments::assert_is_dumping_archive();
DumpTimeSharedClassInfo* info = find_or_allocate_info_for(klass);
info->record_linking_constraint(name, loader1, loader2);
}
// returns true IFF there's no need to re-initialize the i/v-tables for klass for
// the purpose of checking class loader constraints.
bool SystemDictionaryShared::check_linking_constraints(InstanceKlass* klass, TRAPS) {
assert(!DumpSharedSpaces && UseSharedSpaces, "called at run time with CDS enabled only");
LogTarget(Info, class, loader, constraints) log;
if (klass->is_shared_boot_class()) {
// No class loader constraint check performed for boot classes.
return true;
}
if (klass->is_shared_platform_class() || klass->is_shared_app_class()) {
RunTimeSharedClassInfo* info = RunTimeSharedClassInfo::get_for(klass);
assert(info != NULL, "Sanity");
if (info->_num_loader_constraints > 0) {
HandleMark hm;
for (int i = 0; i < info->_num_loader_constraints; i++) {
RunTimeSharedClassInfo::RTLoaderConstraint* lc = info->loader_constraint_at(i);
Symbol* name = lc->constraint_name();
Handle loader1(THREAD, get_class_loader_by(lc->_loader_type1));
Handle loader2(THREAD, get_class_loader_by(lc->_loader_type2));
if (log.is_enabled()) {
ResourceMark rm(THREAD);
log.print("[CDS add loader constraint for class %s symbol %s loader[0] %s loader[1] %s",
klass->external_name(), name->as_C_string(),
ClassLoaderData::class_loader_data(loader1())->loader_name_and_id(),
ClassLoaderData::class_loader_data(loader2())->loader_name_and_id());
}
if (!SystemDictionary::add_loader_constraint(name, klass, loader1, loader2, THREAD)) {
// Loader constraint violation has been found. The caller
// will re-layout the vtable/itables to produce the correct
// exception.
if (log.is_enabled()) {
log.print(" failed]");
}
return false;
}
if (log.is_enabled()) {
log.print(" succeeded]");
}
}
return true; // for all recorded constraints added successully.
}
}
if (log.is_enabled()) {
ResourceMark rm(THREAD);
log.print("[CDS has not recorded loader constraint for class %s]", klass->external_name());
}
return false;
}
class EstimateSizeForArchive : StackObj {
size_t _shared_class_info_size;
int _num_builtin_klasses;
int _num_unregistered_klasses;
public:
EstimateSizeForArchive() {
_shared_class_info_size = 0;
_num_builtin_klasses = 0;
_num_unregistered_klasses = 0;
}
bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
if (!info.is_excluded()) {
size_t byte_size = RunTimeSharedClassInfo::byte_size(info._klass, info.num_verifier_constraints(), info.num_loader_constraints());
_shared_class_info_size += align_up(byte_size, BytesPerWord);
}
return true; // keep on iterating
}
size_t total() {
return _shared_class_info_size;
}
};
size_t SystemDictionaryShared::estimate_size_for_archive() {
EstimateSizeForArchive est;
_dumptime_table->iterate(&est);
size_t total_size = est.total() +
CompactHashtableWriter::estimate_size(_dumptime_table->count_of(true)) +
CompactHashtableWriter::estimate_size(_dumptime_table->count_of(false));
if (_dumptime_lambda_proxy_class_dictionary != NULL) {
total_size +=
(sizeof(RunTimeLambdaProxyClassInfo) * _dumptime_lambda_proxy_class_dictionary->_count) +
CompactHashtableWriter::estimate_size(_dumptime_lambda_proxy_class_dictionary->_count);
} else {
total_size += CompactHashtableWriter::estimate_size(0);
}
return total_size;
}
class CopyLambdaProxyClassInfoToArchive : StackObj {
CompactHashtableWriter* _writer;
public:
CopyLambdaProxyClassInfoToArchive(CompactHashtableWriter* writer)
: _writer(writer) {}
bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
if (SystemDictionaryShared::is_excluded_class(info._proxy_klasses->at(0))) {
return true;
}
ResourceMark rm;
log_info(cds,dynamic)("Archiving hidden %s", info._proxy_klasses->at(0)->external_name());
size_t byte_size = sizeof(RunTimeLambdaProxyClassInfo);
RunTimeLambdaProxyClassInfo* runtime_info =
(RunTimeLambdaProxyClassInfo*)MetaspaceShared::read_only_space_alloc(byte_size);
runtime_info->init(key, info);
unsigned int hash = runtime_info->hash(); // Fields in runtime_info->_key already point to target space.
u4 delta = MetaspaceShared::object_delta_u4(DynamicArchive::buffer_to_target(runtime_info));
_writer->add(hash, delta);
return true;
}
};
class AdjustLambdaProxyClassInfo : StackObj {
public:
AdjustLambdaProxyClassInfo() {}
bool do_entry(LambdaProxyClassKey& key, DumpTimeLambdaProxyClassInfo& info) {
if (SystemDictionaryShared::is_excluded_class(info._proxy_klasses->at(0))) {
return true;
}
int len = info._proxy_klasses->length();
if (len > 1) {
for (int i = 0; i < len-1; i++) {
InstanceKlass* ok0 = info._proxy_klasses->at(i+0); // this is original klass
InstanceKlass* ok1 = info._proxy_klasses->at(i+1); // this is original klass
InstanceKlass* bk0 = DynamicArchive::original_to_buffer(ok0);
InstanceKlass* bk1 = DynamicArchive::original_to_buffer(ok1);
assert(bk0->next_link() == 0, "must be called after Klass::remove_unshareable_info()");
assert(bk1->next_link() == 0, "must be called after Klass::remove_unshareable_info()");
bk0->set_next_link(bk1);
bk1->set_lambda_proxy_is_available();
ArchivePtrMarker::mark_pointer(bk0->next_link_addr());
}
}
DynamicArchive::original_to_buffer(info._proxy_klasses->at(0))->set_lambda_proxy_is_available();
return true;
}
};
class CopySharedClassInfoToArchive : StackObj {
CompactHashtableWriter* _writer;
bool _is_builtin;
public:
CopySharedClassInfoToArchive(CompactHashtableWriter* writer,
bool is_builtin)
: _writer(writer), _is_builtin(is_builtin) {}
bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
if (!info.is_excluded() && info.is_builtin() == _is_builtin) {
size_t byte_size = RunTimeSharedClassInfo::byte_size(info._klass, info.num_verifier_constraints(), info.num_loader_constraints());
RunTimeSharedClassInfo* record;
record = (RunTimeSharedClassInfo*)MetaspaceShared::read_only_space_alloc(byte_size);
record->init(info);
unsigned int hash;
Symbol* name = info._klass->name();
if (DynamicDumpSharedSpaces) {
name = DynamicArchive::original_to_target(name);
}
hash = SystemDictionaryShared::hash_for_shared_dictionary(name);
u4 delta;
if (DynamicDumpSharedSpaces) {
delta = MetaspaceShared::object_delta_u4(DynamicArchive::buffer_to_target(record));
} else {
delta = MetaspaceShared::object_delta_u4(record);
}
if (_is_builtin && info._klass->is_hidden()) {
// skip
} else {
_writer->add(hash, delta);
}
if (log_is_enabled(Trace, cds, hashtables)) {
ResourceMark rm;
log_trace(cds,hashtables)("%s dictionary: %s", (_is_builtin ? "builtin" : "unregistered"), info._klass->external_name());
}
// Save this for quick runtime lookup of InstanceKlass* -> RunTimeSharedClassInfo*
RunTimeSharedClassInfo::set_for(info._klass, record);
}
return true; // keep on iterating
}
};
void SystemDictionaryShared::write_lambda_proxy_class_dictionary(LambdaProxyClassDictionary *dictionary) {
CompactHashtableStats stats;
dictionary->reset();
CompactHashtableWriter writer(_dumptime_lambda_proxy_class_dictionary->_count, &stats);
CopyLambdaProxyClassInfoToArchive copy(&writer);
_dumptime_lambda_proxy_class_dictionary->iterate(&copy);
writer.dump(dictionary, "lambda proxy class dictionary");
}
void SystemDictionaryShared::write_dictionary(RunTimeSharedDictionary* dictionary,
bool is_builtin) {
CompactHashtableStats stats;
dictionary->reset();
CompactHashtableWriter writer(_dumptime_table->count_of(is_builtin), &stats);
CopySharedClassInfoToArchive copy(&writer, is_builtin);
_dumptime_table->iterate(&copy);
writer.dump(dictionary, is_builtin ? "builtin dictionary" : "unregistered dictionary");
}
void SystemDictionaryShared::write_to_archive(bool is_static_archive) {
if (is_static_archive) {
write_dictionary(&_builtin_dictionary, true);
write_dictionary(&_unregistered_dictionary, false);
} else {
write_dictionary(&_dynamic_builtin_dictionary, true);
write_dictionary(&_dynamic_unregistered_dictionary, false);
}
if (_dumptime_lambda_proxy_class_dictionary != NULL) {
write_lambda_proxy_class_dictionary(&_lambda_proxy_class_dictionary);
}
}
void SystemDictionaryShared::adjust_lambda_proxy_class_dictionary() {
if (_dumptime_lambda_proxy_class_dictionary != NULL) {
AdjustLambdaProxyClassInfo adjuster;
_dumptime_lambda_proxy_class_dictionary->iterate(&adjuster);
}
}
void SystemDictionaryShared::serialize_dictionary_headers(SerializeClosure* soc,
bool is_static_archive) {
if (is_static_archive) {
_builtin_dictionary.serialize_header(soc);
_unregistered_dictionary.serialize_header(soc);
} else {
_dynamic_builtin_dictionary.serialize_header(soc);
_dynamic_unregistered_dictionary.serialize_header(soc);
_lambda_proxy_class_dictionary.serialize_header(soc);
}
}
void SystemDictionaryShared::serialize_well_known_klasses(SerializeClosure* soc) {
for (int i = FIRST_WKID; i < WKID_LIMIT; i++) {
soc->do_ptr((void**)&_well_known_klasses[i]);
}
}
const RunTimeSharedClassInfo*
SystemDictionaryShared::find_record(RunTimeSharedDictionary* static_dict, RunTimeSharedDictionary* dynamic_dict, Symbol* name) {
if (!UseSharedSpaces || !name->is_shared()) {
// The names of all shared classes must also be a shared Symbol.
return NULL;
}
unsigned int hash = SystemDictionaryShared::hash_for_shared_dictionary(name);
const RunTimeSharedClassInfo* record = NULL;
if (!MetaspaceShared::is_shared_dynamic(name)) {
// The names of all shared classes in the static dict must also be in the
// static archive
record = static_dict->lookup(name, hash, 0);
}
if (record == NULL && DynamicArchive::is_mapped()) {
record = dynamic_dict->lookup(name, hash, 0);
}
return record;
}
InstanceKlass* SystemDictionaryShared::find_builtin_class(Symbol* name) {
const RunTimeSharedClassInfo* record = find_record(&_builtin_dictionary, &_dynamic_builtin_dictionary, name);
if (record != NULL) {
assert(!record->_klass->is_hidden(), "hidden class cannot be looked up by name");
return record->_klass;
} else {
return NULL;
}
}
void SystemDictionaryShared::update_shared_entry(InstanceKlass* k, int id) {
assert(DumpSharedSpaces, "supported only when dumping");
DumpTimeSharedClassInfo* info = find_or_allocate_info_for(k);
info->_id = id;
}
class SharedDictionaryPrinter : StackObj {
outputStream* _st;
int _index;
public:
SharedDictionaryPrinter(outputStream* st) : _st(st), _index(0) {}
void do_value(const RunTimeSharedClassInfo* record) {
ResourceMark rm;
_st->print_cr("%4d: %s", (_index++), record->_klass->external_name());
}
};
class SharedLambdaDictionaryPrinter : StackObj {
outputStream* _st;
int _index;
public:
SharedLambdaDictionaryPrinter(outputStream* st) : _st(st), _index(0) {}
void do_value(const RunTimeLambdaProxyClassInfo* record) {
ResourceMark rm;
_st->print_cr("%4d: %s", (_index++), record->proxy_klass_head()->external_name());
Klass* k = record->proxy_klass_head()->next_link();
while (k != NULL) {
_st->print_cr("%4d: %s", (_index++), k->external_name());
k = k->next_link();
}
}
};
void SystemDictionaryShared::print_on(outputStream* st) {
if (UseSharedSpaces) {
st->print_cr("Shared Dictionary");
SharedDictionaryPrinter p(st);
_builtin_dictionary.iterate(&p);
_unregistered_dictionary.iterate(&p);
if (DynamicArchive::is_mapped()) {
_dynamic_builtin_dictionary.iterate(&p);
_unregistered_dictionary.iterate(&p);
if (!_lambda_proxy_class_dictionary.empty()) {
st->print_cr("Shared Lambda Dictionary");
SharedLambdaDictionaryPrinter ldp(st);
_lambda_proxy_class_dictionary.iterate(&ldp);
}
}
}
}
void SystemDictionaryShared::print_table_statistics(outputStream* st) {
if (UseSharedSpaces) {
_builtin_dictionary.print_table_statistics(st, "Builtin Shared Dictionary");
_unregistered_dictionary.print_table_statistics(st, "Unregistered Shared Dictionary");
if (DynamicArchive::is_mapped()) {
_dynamic_builtin_dictionary.print_table_statistics(st, "Dynamic Builtin Shared Dictionary");
_dynamic_unregistered_dictionary.print_table_statistics(st, "Unregistered Shared Dictionary");
_lambda_proxy_class_dictionary.print_table_statistics(st, "Lambda Shared Dictionary");
}
}
}
bool SystemDictionaryShared::empty_dumptime_table() {
if (_dumptime_table == NULL) {
return true;
}
_dumptime_table->update_counts();
if (_dumptime_table->count_of(true) == 0 && _dumptime_table->count_of(false) == 0){
return true;
}
return false;
}
#if INCLUDE_CDS_JAVA_HEAP
class ArchivedMirrorPatcher {
static void update(Klass* k) {
if (k->has_raw_archived_mirror()) {
oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
if (m != NULL) {
java_lang_Class::update_archived_mirror_native_pointers(m);
}
}
}
public:
static void update_array_klasses(Klass* ak) {
while (ak != NULL) {
update(ak);
ak = ArrayKlass::cast(ak)->higher_dimension();
}
}
void do_value(const RunTimeSharedClassInfo* info) {
InstanceKlass* ik = info->_klass;
update(ik);
update_array_klasses(ik->array_klasses());
}
};
void SystemDictionaryShared::update_archived_mirror_native_pointers_for(RunTimeSharedDictionary* dict) {
ArchivedMirrorPatcher patcher;
dict->iterate(&patcher);
}
void SystemDictionaryShared::update_archived_mirror_native_pointers() {
if (!HeapShared::open_archive_heap_region_mapped()) {
return;
}
if (MetaspaceShared::relocation_delta() == 0) {
return;
}
update_archived_mirror_native_pointers_for(&_builtin_dictionary);
update_archived_mirror_native_pointers_for(&_unregistered_dictionary);
for (int t = T_BOOLEAN; t <= T_LONG; t++) {
Klass* k = Universe::typeArrayKlassObj((BasicType)t);
ArchivedMirrorPatcher::update_array_klasses(k);
}
}
#endif