< prev index next > src/hotspot/share/cds/heapShared.cpp
Print this page
* questions.
*
*/
#include "precompiled.hpp"
+ #include "cds/aotClassInitializer.hpp"
#include "cds/archiveBuilder.hpp"
#include "cds/archiveHeapLoader.hpp"
#include "cds/archiveHeapWriter.hpp"
#include "cds/archiveUtils.hpp"
+ #include "cds/cdsAccess.hpp"
#include "cds/cdsConfig.hpp"
#include "cds/cdsEnumKlass.hpp"
#include "cds/cdsHeapVerifier.hpp"
#include "cds/heapShared.hpp"
#include "cds/metaspaceShared.hpp"
bool valid() {
return klass_name != nullptr;
}
};
+ class HeapShared::ArchivingObjectMark : public StackObj {
+ public:
+ ArchivingObjectMark(oop obj) {
+ _trace->push(obj);
+ }
+ ~ArchivingObjectMark() {
+ _trace->pop();
+ }
+ };
+
+ class HeapShared::ContextMark : public StackObj {
+ ResourceMark rm;
+ public:
+ ContextMark(const char* c) : rm{} {
+ _context->push(c);
+ }
+ ~ContextMark() {
+ _context->pop();
+ }
+ };
+
bool HeapShared::_disable_writing = false;
DumpedInternedStrings *HeapShared::_dumped_interned_strings = nullptr;
size_t HeapShared::_alloc_count[HeapShared::ALLOC_STAT_SLOTS];
size_t HeapShared::_alloc_size[HeapShared::ALLOC_STAT_SLOTS];
#ifndef PRODUCT
#define ARCHIVE_TEST_FIELD_NAME "archivedObjects"
static Array<char>* _archived_ArchiveHeapTestClass = nullptr;
static const char* _test_class_name = nullptr;
! static const Klass* _test_class = nullptr;
static const ArchivedKlassSubGraphInfoRecord* _test_class_record = nullptr;
#endif
//
#ifndef PRODUCT
#define ARCHIVE_TEST_FIELD_NAME "archivedObjects"
static Array<char>* _archived_ArchiveHeapTestClass = nullptr;
static const char* _test_class_name = nullptr;
! static Klass* _test_class = nullptr;
static const ArchivedKlassSubGraphInfoRecord* _test_class_record = nullptr;
#endif
//
{"jdk/internal/module/ArchivedModuleGraph", "archivedModuleGraph"},
{"java/util/ImmutableCollections", "archivedObjects"},
{"java/lang/ModuleLayer", "EMPTY_LAYER"},
{"java/lang/module/Configuration", "EMPTY_CONFIGURATION"},
{"jdk/internal/math/FDBigInteger", "archivedCaches"},
+ {"java/lang/reflect/Proxy$ProxyBuilder", "archivedData"}, // FIXME -- requires AOTClassLinking
+
#ifndef PRODUCT
{nullptr, nullptr}, // Extra slot for -XX:ArchiveHeapTestClass
#endif
{nullptr, nullptr},
};
{"java/lang/Module$ArchivedData", "archivedData"},
{nullptr, nullptr},
};
KlassSubGraphInfo* HeapShared::_default_subgraph_info;
! GrowableArrayCHeap<oop, mtClassShared>* HeapShared::_pending_roots = nullptr;
GrowableArrayCHeap<OopHandle, mtClassShared>* HeapShared::_root_segments;
int HeapShared::_root_segment_max_size_elems;
OopHandle HeapShared::_scratch_basic_type_mirrors[T_VOID+1];
MetaspaceObjToOopHandleTable* HeapShared::_scratch_java_mirror_table = nullptr;
MetaspaceObjToOopHandleTable* HeapShared::_scratch_references_table = nullptr;
{"java/lang/Module$ArchivedData", "archivedData"},
{nullptr, nullptr},
};
KlassSubGraphInfo* HeapShared::_default_subgraph_info;
! ArchivedKlassSubGraphInfoRecord* HeapShared::_runtime_default_subgraph_info;
+ GrowableArrayCHeap<OopHandle, mtClassShared>* HeapShared::_pending_roots = nullptr;
+ GrowableArrayCHeap<oop, mtClassShared>* HeapShared::_trace = nullptr;
+ GrowableArrayCHeap<const char*, mtClassShared>* HeapShared::_context = nullptr;
GrowableArrayCHeap<OopHandle, mtClassShared>* HeapShared::_root_segments;
int HeapShared::_root_segment_max_size_elems;
OopHandle HeapShared::_scratch_basic_type_mirrors[T_VOID+1];
MetaspaceObjToOopHandleTable* HeapShared::_scratch_java_mirror_table = nullptr;
MetaspaceObjToOopHandleTable* HeapShared::_scratch_references_table = nullptr;
// No GC should happen since we aren't scanning _pending_roots.
assert(Thread::current() == (Thread*)VMThread::vm_thread(), "should be in vm thread");
if (_pending_roots == nullptr) {
! _pending_roots = new GrowableArrayCHeap<oop, mtClassShared>(500);
}
! return _pending_roots->append(obj);
}
objArrayOop HeapShared::root_segment(int segment_idx) {
! if (CDSConfig::is_dumping_heap()) {
assert(Thread::current() == (Thread*)VMThread::vm_thread(), "should be in vm thread");
if (!HeapShared::can_write()) {
return nullptr;
}
} else {
// No GC should happen since we aren't scanning _pending_roots.
assert(Thread::current() == (Thread*)VMThread::vm_thread(), "should be in vm thread");
if (_pending_roots == nullptr) {
! _pending_roots = new GrowableArrayCHeap<OopHandle, mtClassShared>(500);
}
! OopHandle oh(Universe::vm_global(), obj);
+ return _pending_roots->append(oh);
}
objArrayOop HeapShared::root_segment(int segment_idx) {
! if (CDSConfig::is_dumping_heap() && !CDSConfig::is_dumping_final_static_archive()) {
assert(Thread::current() == (Thread*)VMThread::vm_thread(), "should be in vm thread");
if (!HeapShared::can_write()) {
return nullptr;
}
} else {
objArrayOop segment = (objArrayOop)_root_segments->at(segment_idx).resolve();
assert(segment != nullptr, "should have been initialized");
return segment;
}
+ inline unsigned int oop_handle_hash(const OopHandle& oh) {
+ oop o = oh.resolve();
+ if (o == nullptr) {
+ return 0;
+ } else {
+ return o->identity_hash();
+ }
+ }
+
+ inline bool oop_handle_equals(const OopHandle& a, const OopHandle& b) {
+ return a.resolve() == b.resolve();
+ }
+
+ class OrigToScratchObjectTable: public ResourceHashtable<OopHandle, OopHandle,
+ 36137, // prime number
+ AnyObj::C_HEAP,
+ mtClassShared,
+ oop_handle_hash,
+ oop_handle_equals> {};
+
+ static OrigToScratchObjectTable* _orig_to_scratch_object_table = nullptr;
+
+ void HeapShared::track_scratch_object(oop orig_obj, oop scratch_obj) {
+ MutexLocker ml(ArchivedObjectTables_lock, Mutex::_no_safepoint_check_flag);
+ if (_orig_to_scratch_object_table == nullptr) {
+ _orig_to_scratch_object_table = new (mtClass)OrigToScratchObjectTable();
+ }
+
+ OopHandle orig_h(Universe::vm_global(), orig_obj);
+ OopHandle scratch_h(Universe::vm_global(), scratch_obj);
+ _orig_to_scratch_object_table->put_when_absent(orig_h, scratch_h);
+ }
+
+ oop HeapShared::orig_to_scratch_object(oop orig_obj) {
+ MutexLocker ml(ArchivedObjectTables_lock, Mutex::_no_safepoint_check_flag);
+ if (_orig_to_scratch_object_table != nullptr) {
+ OopHandle orig(&orig_obj);
+ OopHandle* v = _orig_to_scratch_object_table->get(orig);
+ if (v != nullptr) {
+ return v->resolve();
+ }
+ }
+ return nullptr;
+ }
+
+ // Permanent oops are used to support AOT-compiled methods, which may have in-line references
+ // to Strings and MH oops.
+ //
+ // At runtime, these oops are stored in _runtime_permanent_oops (which keeps them alive forever)
+ // and are accssed vis CDSAccess::get_archived_object(int).
+ struct PermanentOopInfo {
+ int _index; // Gets assigned only if HeapShared::get_archived_object_permanent_index() has been called on the object
+ int _heap_offset; // Offset of the object from the bottom of the archived heap.
+ PermanentOopInfo(int index, int heap_offset) : _index(index), _heap_offset(heap_offset) {}
+ };
+
+ class PermanentOopTable: public ResourceHashtable<OopHandle, PermanentOopInfo,
+ 36137, // prime number
+ AnyObj::C_HEAP,
+ mtClassShared,
+ oop_handle_hash,
+ oop_handle_equals> {};
+
+ static int _dumptime_permanent_oop_count = 0;
+ static PermanentOopTable* _dumptime_permanent_oop_table = nullptr;
+ static GrowableArrayCHeap<OopHandle, mtClassShared>* _runtime_permanent_oops = nullptr;
+
+ // ArchiveHeapWriter adds each archived heap object to _dumptime_permanent_oop_table,
+ // so we can remember their offset (from the bottom of the archived heap).
+ void HeapShared::add_to_permanent_oop_table(oop obj, int offset) {
+ assert_at_safepoint();
+ if (_dumptime_permanent_oop_table == nullptr) {
+ _dumptime_permanent_oop_table = new (mtClass)PermanentOopTable();
+ }
+
+ PermanentOopInfo info(-1, offset);
+ OopHandle oh(Universe::vm_global(), obj);
+ _dumptime_permanent_oop_table->put_when_absent(oh, info);
+ }
+
+ // A permanent index is assigned to an archived object ONLY when
+ // the AOT compiler calls this function.
+ int HeapShared::get_archived_object_permanent_index(oop obj) {
+ MutexLocker ml(ArchivedObjectTables_lock, Mutex::_no_safepoint_check_flag);
+
+ if (!CDSConfig::is_dumping_heap()) {
+ return -1; // Called by the Leyden old workflow
+ }
+ if (_dumptime_permanent_oop_table == nullptr) {
+ return -1;
+ }
+
+ if (_orig_to_scratch_object_table != nullptr) {
+ OopHandle orig(&obj);
+ OopHandle* v = _orig_to_scratch_object_table->get(orig);
+ if (v != nullptr) {
+ obj = v->resolve();
+ }
+ }
+
+ OopHandle tmp(&obj);
+ PermanentOopInfo* info = _dumptime_permanent_oop_table->get(tmp);
+ if (info == nullptr) {
+ return -1;
+ } else {
+ if (info->_index < 0) {
+ info->_index = _dumptime_permanent_oop_count++;
+ }
+ return info->_index;
+ }
+ }
+
+ oop HeapShared::get_archived_object(int permanent_index) {
+ assert(permanent_index >= 0, "sanity");
+ assert(ArchiveHeapLoader::is_in_use(), "sanity");
+ assert(_runtime_permanent_oops != nullptr, "sanity");
+
+ oop obj = _runtime_permanent_oops->at(permanent_index).resolve();
+ log_info(cds)("GET perm obj %d = %p", permanent_index, cast_from_oop<void*>(obj));
+ if (obj != nullptr) {
+ log_info(cds)("GET perm obj %d class = %p", permanent_index, obj->klass());
+ log_info(cds)("GET perm obj %d class = %s", permanent_index, obj->klass()->external_name());
+ }
+ return obj;
+ }
+
+ // Remember all archived heap objects that have a permanent index.
+ // table[i] = offset of oop whose permanent index is i.
+ void CachedCodeDirectoryInternal::dumptime_init_internal() {
+ const int count = _dumptime_permanent_oop_count;
+ int* table = (int*)CDSAccess::allocate_from_code_cache(count * sizeof(int));
+ for (int i = 0; i < count; i++) {
+ table[count] = -1;
+ }
+ _dumptime_permanent_oop_table->iterate([&](OopHandle o, PermanentOopInfo& info) {
+ int index = info._index;
+ if (index >= 0) {
+ assert(index < count, "sanity");
+ table[index] = info._heap_offset;
+ }
+ return true; // continue
+ });
+
+ for (int i = 0; i < count; i++) {
+ assert(table[i] >= 0, "must be");
+ }
+
+ log_info(cds)("Dumped %d permanent oops", count);
+
+ _permanent_oop_count = count;
+ CDSAccess::set_pointer(&_permanent_oop_offsets, table);
+ }
+
+ // This is called during the bootstrap of the production run, before any GC can happen.
+ // Record each permanent oop in a OopHandle for GC safety.
+ void CachedCodeDirectoryInternal::runtime_init_internal() {
+ int count = _permanent_oop_count;
+ int* table = _permanent_oop_offsets;
+ _runtime_permanent_oops = new GrowableArrayCHeap<OopHandle, mtClassShared>();
+ for (int i = 0; i < count; i++) {
+ oop obj = ArchiveHeapLoader::oop_from_offset(table[i]);
+ OopHandle oh(Universe::vm_global(), obj);
+ _runtime_permanent_oops->append(oh);
+
+ ResourceMark rm;
+ log_info(cds)("perm obj %d = %p", i, cast_from_oop<void*>(obj));
+ if (obj != nullptr) {
+ log_info(cds)("perm obj %d class = %p", i, obj->klass());
+ log_info(cds)("perm obj %d class = %s", i, obj->klass()->external_name());
+ }
+ }
+ };
+
void HeapShared::get_segment_indexes(int idx, int& seg_idx, int& int_idx) {
assert(_root_segment_max_size_elems > 0, "sanity");
// Try to avoid divisions for the common case.
if (idx < _root_segment_max_size_elems) {
}
if (ArchiveHeapWriter::is_too_large_to_archive(obj->size())) {
log_debug(cds, heap)("Cannot archive, object (" PTR_FORMAT ") is too large: " SIZE_FORMAT,
p2i(obj), obj->size());
+ debug_trace();
return false;
} else {
count_allocation(obj->size());
ArchiveHeapWriter::add_source_obj(obj);
CachedOopInfo info = make_cached_oop_info(obj);
archived_object_cache()->maybe_grow();
mark_native_pointers(obj);
if (log_is_enabled(Debug, cds, heap)) {
ResourceMark rm;
! log_debug(cds, heap)("Archived heap object " PTR_FORMAT " : %s",
! p2i(obj), obj->klass()->external_name());
}
if (java_lang_Module::is_instance(obj) && Modules::check_archived_module_oop(obj)) {
Modules::update_oops_in_archived_module(obj, append_root(obj));
}
archived_object_cache()->maybe_grow();
mark_native_pointers(obj);
if (log_is_enabled(Debug, cds, heap)) {
ResourceMark rm;
! LogTarget(Debug, cds, heap) log;
! LogStream out(log);
+ out.print("Archived heap object " PTR_FORMAT " : %s ",
+ p2i(obj), obj->klass()->external_name());
+ if (java_lang_Class::is_instance(obj)) {
+ Klass* k = java_lang_Class::as_Klass(obj);
+ if (k != nullptr) {
+ out.print("%s", k->external_name());
+ } else {
+ out.print("primitive");
+ }
+ }
+ out.cr();
}
if (java_lang_Module::is_instance(obj) && Modules::check_archived_module_oop(obj)) {
Modules::update_oops_in_archived_module(obj, append_root(obj));
}
}
}
};
void HeapShared::add_scratch_resolved_references(ConstantPool* src, objArrayOop dest) {
+ if (_scratch_references_table == nullptr) {
+ _scratch_references_table = new (mtClass)MetaspaceObjToOopHandleTable();
+ }
_scratch_references_table->set_oop(src, dest);
}
objArrayOop HeapShared::scratch_resolved_references(ConstantPool* src) {
return (objArrayOop)_scratch_references_table->get_oop(src);
for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
BasicType bt = (BasicType)i;
if (!is_reference_type(bt)) {
oop m = java_lang_Class::create_basic_type_mirror(type2name(bt), bt, CHECK);
_scratch_basic_type_mirrors[i] = OopHandle(Universe::vm_global(), m);
}
}
_scratch_java_mirror_table = new (mtClass)MetaspaceObjToOopHandleTable();
! _scratch_references_table = new (mtClass)MetaspaceObjToOopHandleTable();
}
oop HeapShared::scratch_java_mirror(BasicType t) {
assert((uint)t < T_VOID+1, "range check");
assert(!is_reference_type(t), "sanity");
for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
BasicType bt = (BasicType)i;
if (!is_reference_type(bt)) {
oop m = java_lang_Class::create_basic_type_mirror(type2name(bt), bt, CHECK);
_scratch_basic_type_mirrors[i] = OopHandle(Universe::vm_global(), m);
+ track_scratch_object(Universe::java_mirror(bt), m);
}
}
_scratch_java_mirror_table = new (mtClass)MetaspaceObjToOopHandleTable();
! if (_scratch_references_table == nullptr) {
+ _scratch_references_table = new (mtClass)MetaspaceObjToOopHandleTable();
+ }
+ }
+
+ // Given java_mirror that represents a (primitive or reference) type T,
+ // return the "scratch" version that represents the same type T.
+ // Note that if java_mirror will be returned if it's already a
+ // scratch mirror.
+ //
+ // See java_lang_Class::create_scratch_mirror() for more info.
+ oop HeapShared::scratch_java_mirror(oop java_mirror) {
+ assert(java_lang_Class::is_instance(java_mirror), "must be");
+
+ for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
+ BasicType bt = (BasicType)i;
+ if (!is_reference_type(bt)) {
+ if (_scratch_basic_type_mirrors[i].resolve() == java_mirror) {
+ return java_mirror;
+ }
+ }
+ }
+
+ if (java_lang_Class::is_primitive(java_mirror)) {
+ return scratch_java_mirror(java_lang_Class::as_BasicType(java_mirror));
+ } else {
+ return scratch_java_mirror(java_lang_Class::as_Klass(java_mirror));
+ }
}
oop HeapShared::scratch_java_mirror(BasicType t) {
assert((uint)t < T_VOID+1, "range check");
assert(!is_reference_type(t), "sanity");
oop HeapShared::scratch_java_mirror(Klass* k) {
return _scratch_java_mirror_table->get_oop(k);
}
void HeapShared::set_scratch_java_mirror(Klass* k, oop mirror) {
+ track_scratch_object(k->java_mirror(), mirror);
_scratch_java_mirror_table->set_oop(k, mirror);
}
void HeapShared::remove_scratch_objects(Klass* k) {
_scratch_java_mirror_table->remove_oop(k);
if (k->is_instance_klass()) {
_scratch_references_table->remove(InstanceKlass::cast(k)->constants());
}
+ oop mirror = k->java_mirror();
+ if (mirror != nullptr) {
+ OopHandle tmp(&mirror);
+ OopHandle* v = _orig_to_scratch_object_table->get(tmp);
+ if (v != nullptr) {
+ oop scratch_mirror = v->resolve();
+ java_lang_Class::set_klass(scratch_mirror, nullptr);
+ _orig_to_scratch_object_table->remove(tmp);
+ }
+ }
+ }
+
+ bool HeapShared::is_lambda_form_klass(InstanceKlass* ik) {
+ return ik->is_hidden() &&
+ (ik->name()->starts_with("java/lang/invoke/LambdaForm$MH+") ||
+ ik->name()->starts_with("java/lang/invoke/LambdaForm$DMH+") ||
+ ik->name()->starts_with("java/lang/invoke/LambdaForm$BMH+"));
+ }
+
+ bool HeapShared::is_lambda_proxy_klass(InstanceKlass* ik) {
+ return ik->is_hidden() && (ik->name()->index_of_at(0, "$$Lambda+", 9) > 0);
+ }
+
+ bool HeapShared::is_archivable_hidden_klass(InstanceKlass* ik) {
+ return CDSConfig::is_dumping_invokedynamic() && (is_lambda_form_klass(ik) || is_lambda_proxy_klass(ik));
+ }
+
+ void HeapShared::copy_aot_initialized_mirror(Klass* orig_k, oop orig_mirror, oop m) {
+ if (!orig_k->is_instance_klass()) {
+ return;
+ }
+ InstanceKlass* ik = InstanceKlass::cast(orig_k);
+
+ if (HeapShared::is_archivable_hidden_klass(ik)) {
+ // We can't rerun the <clinit> method of hidden classes as we don't save
+ // the classData, so we must archive its mirror in initialized state.
+ assert(ik->is_initialized(), "must be");
+ }
+
+ if (!ik->is_initialized() || !AOTClassInitializer::can_archive_initialized_mirror(ik)) {
+ return;
+ }
+
+ int nfields = 0;
+ for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
+ if (fs.access_flags().is_static()) {
+ fieldDescriptor& fd = fs.field_descriptor();
+ int offset = fd.offset();
+ switch (fd.field_type()) {
+ case T_OBJECT:
+ case T_ARRAY:
+ m->obj_field_put(offset, orig_mirror->obj_field(offset));
+ break;
+ case T_BOOLEAN:
+ m->bool_field_put(offset, orig_mirror->bool_field(offset));
+ break;
+ case T_BYTE:
+ m->byte_field_put(offset, orig_mirror->byte_field(offset));
+ break;
+ case T_SHORT:
+ m->short_field_put(offset, orig_mirror->short_field(offset));
+ break;
+ case T_CHAR:
+ m->char_field_put(offset, orig_mirror->char_field(offset));
+ break;
+ case T_INT:
+ m->int_field_put(offset, orig_mirror->int_field(offset));
+ break;
+ case T_LONG:
+ m->long_field_put(offset, orig_mirror->long_field(offset));
+ break;
+ case T_FLOAT:
+ m->float_field_put(offset, orig_mirror->float_field(offset));
+ break;
+ case T_DOUBLE:
+ m->double_field_put(offset, orig_mirror->double_field(offset));
+ break;
+ default:
+ ShouldNotReachHere();
+ }
+ nfields ++;
+ }
+ }
+
+ java_lang_Class::set_class_data(m, java_lang_Class::class_data(orig_mirror));
+
+ // Class::reflectData use SoftReference, which cannot be archived. Set it
+ // to null and it will be recreated at runtime.
+ java_lang_Class::set_reflection_data(m, nullptr);
+
+ if (log_is_enabled(Info, cds, init)) {
+ ResourceMark rm;
+ log_debug(cds, init)("copied %3d field(s) in preinitialized mirror %s%s", nfields, ik->external_name(),
+ ik->is_hidden() ? " (hidden)" : "");
+ }
+
+ InstanceKlass* buffered_ik = ArchiveBuilder::current()->get_buffered_addr(ik);
+ buffered_ik->set_has_preinitialized_mirror();
+ }
+
+ static void copy_java_mirror_hashcode(oop orig_mirror, oop scratch_m) {
+ int src_hash = orig_mirror->identity_hash();
+ scratch_m->set_mark(markWord::prototype().copy_set_hash(src_hash));
+ assert(scratch_m->mark().is_unlocked(), "sanity");
+
+ DEBUG_ONLY(int archived_hash = scratch_m->identity_hash());
+ assert(src_hash == archived_hash, "Java mirror wrong hash: original %x, scratch %x", src_hash, archived_hash);
}
void HeapShared::archive_java_mirrors() {
+ AOTClassInitializer::reset_preinit_check();
+
+ _orig_to_scratch_object_table->iterate([&](OopHandle o, OopHandle s) {
+ copy_java_mirror_hashcode(o.resolve(), s.resolve());
+ return true;
+ });
+
for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
BasicType bt = (BasicType)i;
if (!is_reference_type(bt)) {
+ oop orig_mirror = Universe::java_mirror(bt);
oop m = _scratch_basic_type_mirrors[i].resolve();
assert(m != nullptr, "sanity");
bool success = archive_reachable_objects_from(1, _default_subgraph_info, m);
assert(success, "sanity");
}
}
GrowableArray<Klass*>* klasses = ArchiveBuilder::current()->klasses();
assert(klasses != nullptr, "sanity");
+
+ for (int i = 0; i < klasses->length(); i++) {
+ Klass* orig_k = klasses->at(i);
+ oop orig_mirror = orig_k->java_mirror();
+ oop m = scratch_java_mirror(orig_k);
+ if (m != nullptr) {
+ copy_aot_initialized_mirror(orig_k, orig_mirror, m);
+ if (CDSConfig::is_dumping_reflection_data() && java_lang_Class::has_reflection_data(orig_mirror)) {
+ oop reflection_data = java_lang_Class::reflection_data(orig_mirror);
+ bool success = archive_reachable_objects_from(1, _default_subgraph_info, reflection_data);
+ guarantee(success, "");
+ java_lang_Class::set_reflection_data(m, reflection_data);
+ }
+ }
+ }
+
for (int i = 0; i < klasses->length(); i++) {
Klass* orig_k = klasses->at(i);
+ oop orig_mirror = orig_k->java_mirror();
oop m = scratch_java_mirror(orig_k);
if (m != nullptr) {
Klass* buffered_k = ArchiveBuilder::get_buffered_klass(orig_k);
bool success = archive_reachable_objects_from(1, _default_subgraph_info, m);
guarantee(success, "scratch mirrors must point to only archivable objects");
void HeapShared::mark_native_pointers(oop orig_obj) {
if (java_lang_Class::is_instance(orig_obj)) {
ArchiveHeapWriter::mark_native_pointer(orig_obj, java_lang_Class::klass_offset());
ArchiveHeapWriter::mark_native_pointer(orig_obj, java_lang_Class::array_klass_offset());
+ } else if (java_lang_invoke_ResolvedMethodName::is_instance(orig_obj)) {
+ ArchiveHeapWriter::mark_native_pointer(orig_obj, java_lang_invoke_ResolvedMethodName::vmtarget_offset());
}
}
void HeapShared::get_pointer_info(oop src_obj, bool& has_oop_pointers, bool& has_native_pointers) {
CachedOopInfo* info = archived_object_cache()->get(src_obj);
CachedOopInfo* info = archived_object_cache()->get(src_obj);
assert(info != nullptr, "must be");
info->set_has_native_pointers();
}
+ void HeapShared::start_finding_archivable_hidden_classes() {
+ NoSafepointVerifier nsv;
+
+ init_seen_objects_table();
+
+ find_archivable_hidden_classes_helper(archive_subgraph_entry_fields);
+ if (CDSConfig::is_dumping_full_module_graph()) {
+ find_archivable_hidden_classes_helper(fmg_archive_subgraph_entry_fields);
+ }
+ }
+
+ void HeapShared::end_finding_archivable_hidden_classes() {
+ NoSafepointVerifier nsv;
+
+ delete_seen_objects_table();
+ }
+
+ void HeapShared::find_archivable_hidden_classes_helper(ArchivableStaticFieldInfo fields[]) {
+ if (!CDSConfig::is_dumping_heap()) {
+ return;
+ }
+ for (int i = 0; fields[i].valid(); ) {
+ ArchivableStaticFieldInfo* info = &fields[i];
+ const char* klass_name = info->klass_name;
+ for (; fields[i].valid(); i++) {
+ ArchivableStaticFieldInfo* f = &fields[i];
+ if (f->klass_name != klass_name) {
+ break;
+ }
+
+ InstanceKlass* k = f->klass;
+ oop m = k->java_mirror();
+ oop o = m->obj_field(f->offset);
+ if (o != nullptr) {
+ find_archivable_hidden_classes_in_object(o);
+ }
+ }
+ }
+ }
+
+ class HeapShared::FindHiddenClassesOopClosure: public BasicOopIterateClosure {
+ GrowableArray<oop> _stack;
+ template <class T> void do_oop_work(T *p) {
+ // Recurse on a GrowableArray to avoid overflowing the C stack.
+ oop o = RawAccess<>::oop_load(p);
+ if (o != nullptr) {
+ _stack.append(o);
+ }
+ }
+
+ public:
+
+ void do_oop(narrowOop *p) { FindHiddenClassesOopClosure::do_oop_work(p); }
+ void do_oop( oop *p) { FindHiddenClassesOopClosure::do_oop_work(p); }
+
+ FindHiddenClassesOopClosure(oop o) {
+ _stack.append(o);
+ }
+ oop pop() {
+ if (_stack.length() == 0) {
+ return nullptr;
+ } else {
+ return _stack.pop();
+ }
+ }
+ };
+
+ void HeapShared::find_archivable_hidden_classes_in_object(oop root) {
+ ResourceMark rm;
+ FindHiddenClassesOopClosure c(root);
+ oop o;
+ while ((o = c.pop()) != nullptr) {
+ if (!has_been_seen_during_subgraph_recording(o)) {
+ set_has_been_seen_during_subgraph_recording(o);
+
+ if (java_lang_Class::is_instance(o)) {
+ Klass* k = java_lang_Class::as_Klass(o);
+ if (k != nullptr && k->is_instance_klass()) {
+ SystemDictionaryShared::mark_required_class(InstanceKlass::cast(k));
+ }
+ } else if (java_lang_invoke_ResolvedMethodName::is_instance(o)) {
+ Method* m = java_lang_invoke_ResolvedMethodName::vmtarget(o);
+ if (m != nullptr && m->method_holder() != nullptr) {
+ SystemDictionaryShared::mark_required_class(m->method_holder());
+ }
+ }
+
+ o->oop_iterate(&c);
+ }
+ }
+ }
+
void HeapShared::archive_objects(ArchiveHeapInfo *heap_info) {
{
NoSafepointVerifier nsv;
_default_subgraph_info = init_subgraph_info(vmClasses::Object_klass(), false);
+ _trace = new GrowableArrayCHeap<oop, mtClassShared>(250);
+ _context = new GrowableArrayCHeap<const char*, mtClassShared>(250);
// Cache for recording where the archived objects are copied to
create_archived_object_cache();
if (UseCompressedOops || UseG1GC) {
UseCompressedOops ? p2i(CompressedOops::end()) :
p2i((address)G1CollectedHeap::heap()->reserved().end()));
}
copy_objects();
! CDSHeapVerifier::verify();
check_default_subgraph_classes();
}
! ArchiveHeapWriter::write(_pending_roots, heap_info);
}
void HeapShared::copy_interned_strings() {
init_seen_objects_table();
UseCompressedOops ? p2i(CompressedOops::end()) :
p2i((address)G1CollectedHeap::heap()->reserved().end()));
}
copy_objects();
! if (!SkipArchiveHeapVerification) {
+ CDSHeapVerifier::verify();
+ }
check_default_subgraph_classes();
}
! GrowableArrayCHeap<oop, mtClassShared>* roots = new GrowableArrayCHeap<oop, mtClassShared>(_pending_roots->length());
+ for (int i = 0; i < _pending_roots->length(); i++) {
+ roots->append(_pending_roots->at(i).resolve());
+ }
+ ArchiveHeapWriter::write(roots, heap_info);
}
void HeapShared::copy_interned_strings() {
init_seen_objects_table();
// initialization list.
return;
}
if (buffered_k->is_instance_klass()) {
! assert(InstanceKlass::cast(buffered_k)->is_shared_boot_class(),
! "must be boot class");
// vmClasses::xxx_klass() are not updated, need to check
// the original Klass*
if (orig_k == vmClasses::String_klass() ||
orig_k == vmClasses::Object_klass()) {
// Initialized early during VM initialization. No need to be added
// initialization list.
return;
}
if (buffered_k->is_instance_klass()) {
! if (CDSConfig::is_dumping_invokedynamic()) {
! assert(InstanceKlass::cast(buffered_k)->is_shared_boot_class() ||
+ HeapShared::is_lambda_proxy_klass(InstanceKlass::cast(buffered_k)),
+ "we can archive only instances of boot classes or lambda proxy classes");
+ } else {
+ assert(InstanceKlass::cast(buffered_k)->is_shared_boot_class(),
+ "must be boot class");
+ }
// vmClasses::xxx_klass() are not updated, need to check
// the original Klass*
if (orig_k == vmClasses::String_klass() ||
orig_k == vmClasses::Object_klass()) {
// Initialized early during VM initialization. No need to be added
_subgraph_object_klasses->append_if_missing(buffered_k);
_has_non_early_klasses |= is_non_early_klass(orig_k);
}
void KlassSubGraphInfo::check_allowed_klass(InstanceKlass* ik) {
+ if (CDSConfig::is_dumping_invokedynamic()) {
+ // FIXME -- this allows LambdaProxy classes
+ return;
+ }
if (ik->module()->name() == vmSymbols::java_base()) {
assert(ik->package() != nullptr, "classes in java.base cannot be in unnamed package");
return;
}
ArchivePtrMarker::mark_pointer(&_k);
ArchivePtrMarker::mark_pointer(&_entry_field_records);
ArchivePtrMarker::mark_pointer(&_subgraph_object_klasses);
}
! struct CopyKlassSubGraphInfoToArchive : StackObj {
CompactHashtableWriter* _writer;
CopyKlassSubGraphInfoToArchive(CompactHashtableWriter* writer) : _writer(writer) {}
bool do_entry(Klass* klass, KlassSubGraphInfo& info) {
if (info.subgraph_object_klasses() != nullptr || info.subgraph_entry_fields() != nullptr) {
! ArchivedKlassSubGraphInfoRecord* record =
- (ArchivedKlassSubGraphInfoRecord*)ArchiveBuilder::ro_region_alloc(sizeof(ArchivedKlassSubGraphInfoRecord));
- record->init(&info);
-
Klass* buffered_k = ArchiveBuilder::get_buffered_klass(klass);
unsigned int hash = SystemDictionaryShared::hash_for_shared_dictionary((address)buffered_k);
u4 delta = ArchiveBuilder::current()->any_to_offset_u4(record);
_writer->add(hash, delta);
}
return true; // keep on iterating
}
};
// Build the records of archived subgraph infos, which include:
// - Entry points to all subgraphs from the containing class mirror. The entry
// points are static fields in the mirror. For each entry point, the field
// offset, and value are recorded in the sub-graph
// info. The value is stored back to the corresponding field at runtime.
ArchivePtrMarker::mark_pointer(&_k);
ArchivePtrMarker::mark_pointer(&_entry_field_records);
ArchivePtrMarker::mark_pointer(&_subgraph_object_klasses);
}
! class HeapShared::CopyKlassSubGraphInfoToArchive : StackObj {
CompactHashtableWriter* _writer;
+ public:
CopyKlassSubGraphInfoToArchive(CompactHashtableWriter* writer) : _writer(writer) {}
bool do_entry(Klass* klass, KlassSubGraphInfo& info) {
if (info.subgraph_object_klasses() != nullptr || info.subgraph_entry_fields() != nullptr) {
! ArchivedKlassSubGraphInfoRecord* record = HeapShared::archive_subgraph_info(&info);
Klass* buffered_k = ArchiveBuilder::get_buffered_klass(klass);
unsigned int hash = SystemDictionaryShared::hash_for_shared_dictionary((address)buffered_k);
u4 delta = ArchiveBuilder::current()->any_to_offset_u4(record);
_writer->add(hash, delta);
}
return true; // keep on iterating
}
};
+ ArchivedKlassSubGraphInfoRecord* HeapShared::archive_subgraph_info(KlassSubGraphInfo* info) {
+ ArchivedKlassSubGraphInfoRecord* record =
+ (ArchivedKlassSubGraphInfoRecord*)ArchiveBuilder::ro_region_alloc(sizeof(ArchivedKlassSubGraphInfoRecord));
+ record->init(info);
+ if (info == _default_subgraph_info) {
+ _runtime_default_subgraph_info = record;
+ }
+ return record;
+ }
+
// Build the records of archived subgraph infos, which include:
// - Entry points to all subgraphs from the containing class mirror. The entry
// points are static fields in the mirror. For each entry point, the field
// offset, and value are recorded in the sub-graph
// info. The value is stored back to the corresponding field at runtime.
setup_test_class(_test_class_name);
}
#endif
_run_time_subgraph_info_table.serialize_header(soc);
+ soc->do_ptr(&_runtime_default_subgraph_info);
}
static void verify_the_heap(Klass* k, const char* which) {
if (VerifyArchivedFields > 0) {
ResourceMark rm;
void HeapShared::resolve_classes(JavaThread* current) {
assert(CDSConfig::is_using_archive(), "runtime only!");
if (!ArchiveHeapLoader::is_in_use()) {
return; // nothing to do
}
+
+ if (!CDSConfig::is_using_aot_linked_classes()) {
+ assert( _runtime_default_subgraph_info != nullptr, "must be");
+ Array<Klass*>* klasses = _runtime_default_subgraph_info->subgraph_object_klasses();
+ if (klasses != nullptr) {
+ for (int i = 0; i < klasses->length(); i++) {
+ Klass* k = klasses->at(i);
+ ExceptionMark em(current); // no exception can happen here
+ resolve_or_init(k, /*do_init*/false, current);
+ }
+ }
+ }
+
resolve_classes_for_subgraphs(current, archive_subgraph_entry_fields);
resolve_classes_for_subgraphs(current, fmg_archive_subgraph_entry_fields);
}
void HeapShared::resolve_classes_for_subgraphs(JavaThread* current, ArchivableStaticFieldInfo fields[]) {
if (record == nullptr) {
clear_archived_roots_of(k);
}
}
+ void HeapShared::initialize_java_lang_invoke(TRAPS) {
+ if (CDSConfig::is_loading_invokedynamic() || CDSConfig::is_dumping_invokedynamic()) {
+ resolve_or_init("java/lang/invoke/Invokers$Holder", true, CHECK);
+ resolve_or_init("java/lang/invoke/MethodHandle", true, CHECK);
+ resolve_or_init("java/lang/invoke/MethodHandleNatives", true, CHECK);
+ resolve_or_init("java/lang/invoke/DirectMethodHandle$Holder", true, CHECK);
+ resolve_or_init("java/lang/invoke/DelegatingMethodHandle$Holder", true, CHECK);
+ resolve_or_init("java/lang/invoke/LambdaForm$Holder", true, CHECK);
+ resolve_or_init("java/lang/invoke/BoundMethodHandle$Species_L", true, CHECK);
+ }
+ }
+
+ void HeapShared::initialize_default_subgraph_classes(Handle class_loader, TRAPS) {
+ if (!ArchiveHeapLoader::is_in_use()) {
+ return;
+ }
+
+ assert( _runtime_default_subgraph_info != nullptr, "must be");
+ Array<Klass*>* klasses = _runtime_default_subgraph_info->subgraph_object_klasses();
+ if (klasses != nullptr) {
+ for (int pass = 0; pass < 2; pass ++) {
+ for (int i = 0; i < klasses->length(); i++) {
+ Klass* k = klasses->at(i);
+ if (k->class_loader_data() == nullptr) {
+ // This class is not yet loaded. We will initialize it in a later phase.
+ continue;
+ }
+ if (k->class_loader() == class_loader()) {
+ if (pass == 0) {
+ if (k->is_instance_klass()) {
+ InstanceKlass::cast(k)->link_class(CHECK);
+ }
+ } else {
+ resolve_or_init(k, /*do_init*/true, CHECK);
+ }
+ }
+ }
+ }
+ }
+ }
+
void HeapShared::initialize_from_archived_subgraph(JavaThread* current, Klass* k) {
JavaThread* THREAD = current;
if (!ArchiveHeapLoader::is_in_use()) {
return; // nothing to do
}
}
return record;
}
+ void HeapShared::resolve_or_init(const char* klass_name, bool do_init, TRAPS) {
+ TempNewSymbol klass_name_sym = SymbolTable::new_symbol(klass_name);
+ InstanceKlass* k = SystemDictionaryShared::find_builtin_class(klass_name_sym);
+ if (k == nullptr) {
+ return;
+ }
+ assert(k->is_shared_boot_class(), "sanity");
+ resolve_or_init(k, false, CHECK);
+ if (do_init) {
+ resolve_or_init(k, true, CHECK);
+ }
+ }
+
void HeapShared::resolve_or_init(Klass* k, bool do_init, TRAPS) {
if (!do_init) {
if (k->class_loader_data() == nullptr) {
Klass* resolved_k = SystemDictionary::resolve_or_null(k->name(), CHECK);
assert(resolved_k == k, "classes used by archived heap must not be replaced by JVMTI ClassFileLoadHook");
PointsToOopsChecker points_to_oops_checker;
obj->oop_iterate(&points_to_oops_checker);
return CachedOopInfo(referrer, points_to_oops_checker.result());
}
// (1) If orig_obj has not been archived yet, archive it.
// (2) If orig_obj has not been seen yet (since start_recording_subgraph() was called),
// trace all objects that are reachable from it, and make sure these objects are archived.
// (3) Record the klasses of all orig_obj and all reachable objects.
bool HeapShared::archive_reachable_objects_from(int level,
KlassSubGraphInfo* subgraph_info,
oop orig_obj) {
assert(orig_obj != nullptr, "must be");
if (!JavaClasses::is_supported_for_archiving(orig_obj)) {
// This object has injected fields that cannot be supported easily, so we disallow them for now.
// If you get an error here, you probably made a change in the JDK library that has added
// these objects that are referenced (directly or indirectly) by static fields.
ResourceMark rm;
! log_error(cds, heap)("Cannot archive object of class %s", orig_obj->klass()->external_name());
! if (log_is_enabled(Trace, cds, heap)) {
! WalkOopAndArchiveClosure* walker = WalkOopAndArchiveClosure::current();
! if (walker != nullptr) {
! LogStream ls(Log(cds, heap)::trace());
! CDSHeapVerifier::trace_to_root(&ls, walker->referencing_obj());
! }
}
! MetaspaceShared::unrecoverable_writing_error();
}
! // java.lang.Class instances cannot be included in an archived object sub-graph. We only support
! // them as Klass::_archived_mirror because they need to be specially restored at run time.
! //
- // If you get an error here, you probably made a change in the JDK library that has added a Class
- // object that is referenced (directly or indirectly) by static fields.
- if (java_lang_Class::is_instance(orig_obj) && subgraph_info != _default_subgraph_info) {
- log_error(cds, heap)("(%d) Unknown java.lang.Class object is in the archived sub-graph", level);
- MetaspaceShared::unrecoverable_writing_error();
}
if (has_been_seen_during_subgraph_recording(orig_obj)) {
// orig_obj has already been archived and traced. Nothing more to do.
return true;
PointsToOopsChecker points_to_oops_checker;
obj->oop_iterate(&points_to_oops_checker);
return CachedOopInfo(referrer, points_to_oops_checker.result());
}
+ // We currently allow only the box classes, as well as j.l.Object, which are
+ // initialized very early by HeapShared::init_box_classes().
+ bool HeapShared::can_mirror_be_used_in_subgraph(oop orig_java_mirror) {
+ return java_lang_Class::is_primitive(orig_java_mirror)
+ || orig_java_mirror == vmClasses::Boolean_klass()->java_mirror()
+ || orig_java_mirror == vmClasses::Character_klass()->java_mirror()
+ || orig_java_mirror == vmClasses::Float_klass()->java_mirror()
+ || orig_java_mirror == vmClasses::Double_klass()->java_mirror()
+ || orig_java_mirror == vmClasses::Byte_klass()->java_mirror()
+ || orig_java_mirror == vmClasses::Short_klass()->java_mirror()
+ || orig_java_mirror == vmClasses::Integer_klass()->java_mirror()
+ || orig_java_mirror == vmClasses::Long_klass()->java_mirror()
+ || orig_java_mirror == vmClasses::Void_klass()->java_mirror()
+ || orig_java_mirror == vmClasses::Object_klass()->java_mirror();
+ }
+
+ void HeapShared::init_box_classes(TRAPS) {
+ if (ArchiveHeapLoader::is_in_use()) {
+ vmClasses::Boolean_klass()->initialize(CHECK);
+ vmClasses::Character_klass()->initialize(CHECK);
+ vmClasses::Float_klass()->initialize(CHECK);
+ vmClasses::Double_klass()->initialize(CHECK);
+ vmClasses::Byte_klass()->initialize(CHECK);
+ vmClasses::Short_klass()->initialize(CHECK);
+ vmClasses::Integer_klass()->initialize(CHECK);
+ vmClasses::Long_klass()->initialize(CHECK);
+ vmClasses::Void_klass()->initialize(CHECK);
+ }
+ }
+
+ void HeapShared::exit_on_error() {
+ if (_context != nullptr) {
+ ResourceMark rm;
+ LogStream ls(Log(cds, heap)::error());
+ ls.print_cr("Context");
+ for (int i = 0; i < _context->length(); i++) {
+ const char* s = _context->at(i);
+ ls.print_cr("- %s", s);
+ }
+ }
+ if (_trace != nullptr) {
+ ResourceMark rm;
+ LogStream ls(Log(cds, heap)::error());
+ ls.print_cr("Reference trace");
+ for (int i = 0; i < _trace->length(); i++) {
+ oop orig_obj = _trace->at(i);
+ ls.print_cr("[%d] ========================================", i);
+ orig_obj->print_on(&ls);
+ ls.cr();
+ }
+ }
+ MetaspaceShared::unrecoverable_writing_error();
+ }
+
+ void HeapShared::debug_trace() {
+ WalkOopAndArchiveClosure* walker = WalkOopAndArchiveClosure::current();
+ if (walker != nullptr) {
+ LogStream ls(Log(cds, heap)::error());
+ CDSHeapVerifier::trace_to_root(&ls, walker->referencing_obj());
+ }
+ }
+
// (1) If orig_obj has not been archived yet, archive it.
// (2) If orig_obj has not been seen yet (since start_recording_subgraph() was called),
// trace all objects that are reachable from it, and make sure these objects are archived.
// (3) Record the klasses of all orig_obj and all reachable objects.
bool HeapShared::archive_reachable_objects_from(int level,
KlassSubGraphInfo* subgraph_info,
oop orig_obj) {
+ ArchivingObjectMark mark(orig_obj);
assert(orig_obj != nullptr, "must be");
if (!JavaClasses::is_supported_for_archiving(orig_obj)) {
// This object has injected fields that cannot be supported easily, so we disallow them for now.
// If you get an error here, you probably made a change in the JDK library that has added
// these objects that are referenced (directly or indirectly) by static fields.
ResourceMark rm;
! log_error(cds, heap)("Cannot archive object " PTR_FORMAT " of class %s", p2i(orig_obj), orig_obj->klass()->external_name());
! debug_trace();
! exit_on_error();
! }
!
! if (log_is_enabled(Debug, cds, heap) && java_lang_Class::is_instance(orig_obj)) {
! ResourceMark rm;
+ LogTarget(Debug, cds, heap) log;
+ LogStream out(log);
+ out.print("Found java mirror " PTR_FORMAT " ", p2i(orig_obj));
+ Klass* k = java_lang_Class::as_Klass(orig_obj);
+ if (k != nullptr) {
+ out.print("%s", k->external_name());
+ } else {
+ out.print("primitive");
}
! out.print_cr("; scratch mirror = " PTR_FORMAT,
+ p2i(scratch_java_mirror(orig_obj)));
}
! if (java_lang_Class::is_instance(orig_obj)) {
! orig_obj = scratch_java_mirror(orig_obj);
! assert(orig_obj != nullptr, "must be archived");
}
if (has_been_seen_during_subgraph_recording(orig_obj)) {
// orig_obj has already been archived and traced. Nothing more to do.
return true;
return false;
} else {
// We don't know how to handle an object that has been archived, but some of its reachable
// objects cannot be archived. Bail out for now. We might need to fix this in the future if
// we have a real use case.
! MetaspaceShared::unrecoverable_writing_error();
}
}
}
Klass *orig_k = orig_obj->klass();
subgraph_info->add_subgraph_object_klass(orig_k);
WalkOopAndArchiveClosure walker(level, record_klasses_only, subgraph_info, orig_obj);
orig_obj->oop_iterate(&walker);
! if (CDSEnumKlass::is_enum_obj(orig_obj)) {
! CDSEnumKlass::handle_enum_obj(level + 1, subgraph_info, orig_obj);
}
return true;
}
//
// Start from the given static field in a java mirror and archive the
return false;
} else {
// We don't know how to handle an object that has been archived, but some of its reachable
// objects cannot be archived. Bail out for now. We might need to fix this in the future if
// we have a real use case.
! exit_on_error();
}
}
}
Klass *orig_k = orig_obj->klass();
subgraph_info->add_subgraph_object_klass(orig_k);
WalkOopAndArchiveClosure walker(level, record_klasses_only, subgraph_info, orig_obj);
orig_obj->oop_iterate(&walker);
! if (CDSConfig::is_initing_classes_at_dump_time()) {
! // The enum klasses are archived with preinitialized mirror.
+ // See AOTClassInitializer::can_archive_initialized_mirror.
+ } else {
+ if (CDSEnumKlass::is_enum_obj(orig_obj)) {
+ CDSEnumKlass::handle_enum_obj(level + 1, subgraph_info, orig_obj);
+ }
}
+
return true;
}
//
// Start from the given static field in a java mirror and archive the
delete_seen_objects_table();
}
void HeapShared::verify_reachable_objects_from(oop obj) {
_num_total_verifications ++;
+ if (java_lang_Class::is_instance(obj)) {
+ obj = scratch_java_mirror(obj);
+ assert(obj != nullptr, "must be");
+ }
if (!has_been_seen_during_subgraph_recording(obj)) {
set_has_been_seen_during_subgraph_recording(obj);
assert(has_been_archived(obj), "must be");
VerifySharedOopClosure walker;
obj->oop_iterate(&walker);
// The "default subgraph" contains special objects (see heapShared.hpp) that
// can be accessed before we load any Java classes (including java/lang/Class).
// Make sure that these are only instances of the very few specific types
// that we can handle.
void HeapShared::check_default_subgraph_classes() {
GrowableArray<Klass*>* klasses = _default_subgraph_info->subgraph_object_klasses();
int num = klasses->length();
for (int i = 0; i < num; i++) {
Klass* subgraph_k = klasses->at(i);
! if (log_is_enabled(Info, cds, heap)) {
ResourceMark rm;
! log_info(cds, heap)(
- "Archived object klass (default subgraph %d) => %s",
- i, subgraph_k->external_name());
}
-
- Symbol* name = ArchiveBuilder::current()->get_source_addr(subgraph_k->name());
- guarantee(name == vmSymbols::java_lang_Class() ||
- name == vmSymbols::java_lang_String() ||
- name == vmSymbols::java_lang_ArithmeticException() ||
- name == vmSymbols::java_lang_NullPointerException() ||
- name == vmSymbols::java_lang_InternalError() ||
- name == vmSymbols::java_lang_ArrayIndexOutOfBoundsException() ||
- name == vmSymbols::java_lang_ArrayStoreException() ||
- name == vmSymbols::java_lang_ClassCastException() ||
- name == vmSymbols::object_array_signature() ||
- name == vmSymbols::byte_array_signature() ||
- name == vmSymbols::char_array_signature(),
- "default subgraph can have only these objects");
}
}
HeapShared::SeenObjectsTable* HeapShared::_seen_objects_table = nullptr;
int HeapShared::_num_new_walked_objs;
// The "default subgraph" contains special objects (see heapShared.hpp) that
// can be accessed before we load any Java classes (including java/lang/Class).
// Make sure that these are only instances of the very few specific types
// that we can handle.
void HeapShared::check_default_subgraph_classes() {
+ if (CDSConfig::is_initing_classes_at_dump_time()) {
+ return;
+ }
+
GrowableArray<Klass*>* klasses = _default_subgraph_info->subgraph_object_klasses();
int num = klasses->length();
for (int i = 0; i < num; i++) {
Klass* subgraph_k = klasses->at(i);
! Symbol* name = ArchiveBuilder::current()->get_source_addr(subgraph_k->name());
+ if (subgraph_k->is_instance_klass() &&
+ name != vmSymbols::java_lang_Class() &&
+ name != vmSymbols::java_lang_String() &&
+ name != vmSymbols::java_lang_ArithmeticException() &&
+ name != vmSymbols::java_lang_ArrayIndexOutOfBoundsException() &&
+ name != vmSymbols::java_lang_ArrayStoreException() &&
+ name != vmSymbols::java_lang_ClassCastException() &&
+ name != vmSymbols::java_lang_InternalError() &&
+ name != vmSymbols::java_lang_NullPointerException()) {
ResourceMark rm;
! fatal("default subgraph cannot have objects of type %s", subgraph_k->external_name());
}
}
}
HeapShared::SeenObjectsTable* HeapShared::_seen_objects_table = nullptr;
int HeapShared::_num_new_walked_objs;
}
}
return false;
}
+
+ void HeapShared::initialize_test_class_from_archive(JavaThread* current) {
+ Klass* k = _test_class;
+ if (k != nullptr && ArchiveHeapLoader::is_in_use()) {
+ JavaThread* THREAD = current;
+ ExceptionMark em(THREAD);
+ const ArchivedKlassSubGraphInfoRecord* record =
+ resolve_or_init_classes_for_subgraph_of(k, /*do_init=*/false, THREAD);
+
+ // The _test_class is in the unnamed module, so it can't call CDS.initializeFromArchive()
+ // from its <clinit> method. So we set up its "archivedObjects" field first, before
+ // calling its <clinit>. This is not strictly clean, but it's a convenient way to write unit
+ // test cases (see test/hotspot/jtreg/runtime/cds/appcds/cacheObject/ArchiveHeapTestClass.java).
+ if (record != nullptr) {
+ init_archived_fields_for(k, record);
+ }
+ resolve_or_init_classes_for_subgraph_of(k, /*do_init=*/true, THREAD);
+ }
+ }
#endif
void HeapShared::init_for_dumping(TRAPS) {
if (HeapShared::can_write()) {
setup_test_class(ArchiveHeapTestClass);
for (int i = 0; fields[i].valid(); ) {
ArchivableStaticFieldInfo* info = &fields[i];
const char* klass_name = info->klass_name;
start_recording_subgraph(info->klass, klass_name, is_full_module_graph);
+ ContextMark cm(klass_name);
// If you have specified consecutive fields of the same klass in
// fields[], these will be archived in the same
// {start_recording_subgraph ... done_recording_subgraph} pass to
// save time.
for (; fields[i].valid(); i++) {
ArchivableStaticFieldInfo* f = &fields[i];
if (f->klass_name != klass_name) {
break;
}
+ ContextMark cm(f->field_name);
archive_reachable_objects_from_static_field(f->klass, f->klass_name,
f->offset, f->field_name);
}
done_recording_subgraph(info->klass, klass_name);
}
< prev index next >