128 bool _read_only;
129 bool _has_embedded_pointer;
130 FollowMode _follow_mode;
131 int _size_in_bytes;
132 int _id; // Each object has a unique serial ID, starting from zero. The ID is assigned
133 // when the object is added into _source_objs.
134 MetaspaceObj::Type _msotype;
135 address _source_addr; // The source object to be copied.
136 address _buffered_addr; // The copy of this object insider the buffer.
137 public:
138 SourceObjInfo(MetaspaceClosure::Ref* ref, bool read_only, FollowMode follow_mode) :
139 _ptrmap_start(0), _ptrmap_end(0), _read_only(read_only), _has_embedded_pointer(false), _follow_mode(follow_mode),
140 _size_in_bytes(ref->size() * BytesPerWord), _id(0), _msotype(ref->msotype()),
141 _source_addr(ref->obj()) {
142 if (follow_mode == point_to_it) {
143 _buffered_addr = ref->obj();
144 } else {
145 _buffered_addr = nullptr;
146 }
147 }
148
149 // This constructor is only used for regenerated objects (created by LambdaFormInvokers, etc).
150 // src = address of a Method or InstanceKlass that has been regenerated.
151 // renegerated_obj_info = info for the regenerated version of src.
152 SourceObjInfo(address src, SourceObjInfo* renegerated_obj_info) :
153 _ptrmap_start(0), _ptrmap_end(0), _read_only(false),
154 _follow_mode(renegerated_obj_info->_follow_mode),
155 _size_in_bytes(0), _msotype(renegerated_obj_info->_msotype),
156 _source_addr(src), _buffered_addr(renegerated_obj_info->_buffered_addr) {}
157
158 bool should_copy() const { return _follow_mode == make_a_copy; }
159 void set_buffered_addr(address addr) {
160 assert(should_copy(), "must be");
161 assert(_buffered_addr == nullptr, "cannot be copied twice");
162 assert(addr != nullptr, "must be a valid copy");
163 _buffered_addr = addr;
164 }
165 void set_ptrmap_start(uintx v) { _ptrmap_start = v; }
166 void set_ptrmap_end(uintx v) { _ptrmap_end = v; }
167 uintx ptrmap_start() const { return _ptrmap_start; } // inclusive
194 GrowableArray<SourceObjInfo*>* objs() const { return _objs; }
195
196 void append(SourceObjInfo* src_info);
197 void remember_embedded_pointer(SourceObjInfo* pointing_obj, MetaspaceClosure::Ref* ref);
198 void relocate(int i, ArchiveBuilder* builder);
199
200 // convenience accessor
201 SourceObjInfo* at(int i) const { return objs()->at(i); }
202 };
203
204 class CDSMapLogger;
205
206 static const int INITIAL_TABLE_SIZE = 15889;
207 static const int MAX_TABLE_SIZE = 1000000;
208
209 ReservedSpace _shared_rs;
210 VirtualSpace _shared_vs;
211
212 DumpRegion _rw_region;
213 DumpRegion _ro_region;
214
215 // Combined bitmap to track pointers in both RW and RO regions. This is updated
216 // as objects are copied into RW and RO.
217 CHeapBitMap _ptrmap;
218
219 // _ptrmap is split into these two bitmaps which are written into the archive.
220 CHeapBitMap _rw_ptrmap; // marks pointers in the RW region
221 CHeapBitMap _ro_ptrmap; // marks pointers in the RO region
222
223 SourceObjList _rw_src_objs; // objs to put in rw region
224 SourceObjList _ro_src_objs; // objs to put in ro region
225 ResizeableResourceHashtable<address, SourceObjInfo, AnyObj::C_HEAP, mtClassShared> _src_obj_table;
226 ResizeableResourceHashtable<address, address, AnyObj::C_HEAP, mtClassShared> _buffered_to_src_table;
227 GrowableArray<Klass*>* _klasses;
228 GrowableArray<Symbol*>* _symbols;
229 unsigned int _entropy_seed;
230
231 // statistics
232 DumpAllocStats _alloc_stats;
233 size_t _total_heap_region_size;
234
235 void print_region_stats(FileMapInfo *map_info, ArchiveHeapInfo* heap_info);
236 void print_bitmap_region_stats(size_t size, size_t total_size);
237 void print_heap_region_stats(ArchiveHeapInfo* heap_info, size_t total_size);
238
239 // For global access.
240 static ArchiveBuilder* _current;
241
242 public:
243 // Use this when you allocate space outside of ArchiveBuilder::dump_{rw,ro}_region.
244 // These are usually for misc tables that are allocated in the RO space.
245 class OtherROAllocMark {
246 char* _oldtop;
247 public:
248 OtherROAllocMark() {
249 _oldtop = _current->_ro_region.top();
250 }
251 ~OtherROAllocMark();
252 };
253
254 private:
255 FollowMode get_follow_mode(MetaspaceClosure::Ref *ref);
256
257 void iterate_sorted_roots(MetaspaceClosure* it);
258 void sort_klasses();
259 static int compare_symbols_by_address(Symbol** a, Symbol** b);
260 static int compare_klass_by_name(Klass** a, Klass** b);
261
262 void make_shallow_copies(DumpRegion *dump_region, const SourceObjList* src_objs);
263 void make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info);
264
265 void relocate_embedded_pointers(SourceObjList* src_objs);
266
267 bool is_excluded(Klass* k);
268 void clean_up_src_obj_table();
269
270 protected:
271 virtual void iterate_roots(MetaspaceClosure* it) = 0;
272
273 // Conservative estimate for number of bytes needed for:
274 size_t _estimated_metaspaceobj_bytes; // all archived MetaspaceObj's.
275 size_t _estimated_hashtable_bytes; // symbol table and dictionaries
276
277 static const int _total_dump_regions = 2;
278
279 size_t estimate_archive_size();
280
281 void start_dump_region(DumpRegion* next);
282 void verify_estimate_size(size_t estimate, const char* which);
283
284 public:
285 address reserve_buffer();
286
287 address buffer_bottom() const { return _buffer_bottom; }
288 address buffer_top() const { return (address)current_dump_region()->top(); }
289 address requested_static_archive_bottom() const { return _requested_static_archive_bottom; }
290 address mapped_static_archive_bottom() const { return _mapped_static_archive_bottom; }
291 intx buffer_to_requested_delta() const { return _buffer_to_requested_delta; }
292
293 bool is_in_buffer_space(address p) const {
294 return (buffer_bottom() <= p && p < buffer_top());
295 }
296
297 template <typename T> bool is_in_requested_static_archive(T p) const {
298 return _requested_static_archive_bottom <= (address)p && (address)p < _requested_static_archive_top;
299 }
300
301 template <typename T> bool is_in_mapped_static_archive(T p) const {
302 return _mapped_static_archive_bottom <= (address)p && (address)p < _mapped_static_archive_top;
303 }
304
305 template <typename T> bool is_in_buffer_space(T obj) const {
306 return is_in_buffer_space(address(obj));
307 }
308
309 template <typename T> T to_requested(T obj) const {
310 assert(is_in_buffer_space(obj), "must be");
311 return (T)(address(obj) + _buffer_to_requested_delta);
312 }
313
326 // The address p points to an object inside the output buffer. When the archive is mapped
327 // at the requested address, what's the offset of this object from _requested_static_archive_bottom?
328 uintx buffer_to_offset(address p) const;
329
330 // Same as buffer_to_offset, except that the address p points to either (a) an object
331 // inside the output buffer, or (b), an object in the currently mapped static archive.
332 uintx any_to_offset(address p) const;
333
334 template <typename T>
335 u4 buffer_to_offset_u4(T p) const {
336 uintx offset = buffer_to_offset((address)p);
337 return to_offset_u4(offset);
338 }
339
340 template <typename T>
341 u4 any_to_offset_u4(T p) const {
342 uintx offset = any_to_offset((address)p);
343 return to_offset_u4(offset);
344 }
345
346 static void assert_is_vm_thread() PRODUCT_RETURN;
347
348 public:
349 ArchiveBuilder();
350 ~ArchiveBuilder();
351
352 int entropy();
353 void gather_klasses_and_symbols();
354 void gather_source_objs();
355 bool gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only);
356 bool gather_one_source_obj(MetaspaceClosure::Ref* ref, bool read_only);
357 void remember_embedded_pointer_in_enclosing_obj(MetaspaceClosure::Ref* ref);
358 static void serialize_dynamic_archivable_items(SerializeClosure* soc);
359
360 DumpRegion* rw_region() { return &_rw_region; }
361 DumpRegion* ro_region() { return &_ro_region; }
362
363 static char* rw_region_alloc(size_t num_bytes) {
364 return current()->rw_region()->allocate(num_bytes);
365 }
366 static char* ro_region_alloc(size_t num_bytes) {
367 return current()->ro_region()->allocate(num_bytes);
368 }
369
370 template <typename T>
371 static Array<T>* new_ro_array(int length) {
372 size_t byte_size = Array<T>::byte_sizeof(length, sizeof(T));
373 Array<T>* array = (Array<T>*)ro_region_alloc(byte_size);
374 array->initialize(length);
375 return array;
376 }
377
378 template <typename T>
379 static Array<T>* new_rw_array(int length) {
380 size_t byte_size = Array<T>::byte_sizeof(length, sizeof(T));
381 Array<T>* array = (Array<T>*)rw_region_alloc(byte_size);
382 array->initialize(length);
383 return array;
384 }
385
386 template <typename T>
387 static size_t ro_array_bytesize(int length) {
388 size_t byte_size = Array<T>::byte_sizeof(length, sizeof(T));
389 return align_up(byte_size, SharedSpaceObjectAlignment);
390 }
391
392 char* ro_strdup(const char* s);
393
394 static int compare_src_objs(SourceObjInfo** a, SourceObjInfo** b);
395 void sort_metadata_objs();
396 void dump_rw_metadata();
397 void dump_ro_metadata();
398 void relocate_metaspaceobj_embedded_pointers();
399 void record_regenerated_object(address orig_src_obj, address regen_src_obj);
400 void make_klasses_shareable();
401 void relocate_to_requested();
402 void write_archive(FileMapInfo* mapinfo, ArchiveHeapInfo* heap_info);
403 void write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region,
404 bool read_only, bool allow_exec);
405
406 void write_pointer_in_buffer(address* ptr_location, address src_addr);
407 template <typename T> void write_pointer_in_buffer(T* ptr_location, T src_addr) {
408 write_pointer_in_buffer((address*)ptr_location, (address)src_addr);
409 }
410
411 address get_buffered_addr(address src_addr) const;
412 template <typename T> T get_buffered_addr(T src_addr) const {
413 return (T)get_buffered_addr((address)src_addr);
414 }
415
416 address get_source_addr(address buffered_addr) const;
417 template <typename T> T get_source_addr(T buffered_addr) const {
418 return (T)get_source_addr((address)buffered_addr);
419 }
420
421 // All klasses and symbols that will be copied into the archive
422 GrowableArray<Klass*>* klasses() const { return _klasses; }
423 GrowableArray<Symbol*>* symbols() const { return _symbols; }
424
425 static bool is_active() {
426 return (_current != nullptr);
427 }
428
429 static ArchiveBuilder* current() {
430 assert_is_vm_thread();
431 assert(_current != nullptr, "ArchiveBuilder must be active");
432 return _current;
433 }
434
435 static DumpAllocStats* alloc_stats() {
436 return &(current()->_alloc_stats);
437 }
438
439 static CompactHashtableStats* symbol_stats() {
440 return alloc_stats()->symbol_stats();
441 }
442
443 static CompactHashtableStats* string_stats() {
444 return alloc_stats()->string_stats();
445 }
446
447 narrowKlass get_requested_narrow_klass(Klass* k);
448
449 static Klass* get_buffered_klass(Klass* src_klass) {
450 Klass* klass = (Klass*)current()->get_buffered_addr((address)src_klass);
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128 bool _read_only;
129 bool _has_embedded_pointer;
130 FollowMode _follow_mode;
131 int _size_in_bytes;
132 int _id; // Each object has a unique serial ID, starting from zero. The ID is assigned
133 // when the object is added into _source_objs.
134 MetaspaceObj::Type _msotype;
135 address _source_addr; // The source object to be copied.
136 address _buffered_addr; // The copy of this object insider the buffer.
137 public:
138 SourceObjInfo(MetaspaceClosure::Ref* ref, bool read_only, FollowMode follow_mode) :
139 _ptrmap_start(0), _ptrmap_end(0), _read_only(read_only), _has_embedded_pointer(false), _follow_mode(follow_mode),
140 _size_in_bytes(ref->size() * BytesPerWord), _id(0), _msotype(ref->msotype()),
141 _source_addr(ref->obj()) {
142 if (follow_mode == point_to_it) {
143 _buffered_addr = ref->obj();
144 } else {
145 _buffered_addr = nullptr;
146 }
147 }
148 SourceObjInfo(address src, address buf) {
149 _source_addr = src;
150 _buffered_addr = buf;
151 }
152
153 // This constructor is only used for regenerated objects (created by LambdaFormInvokers, etc).
154 // src = address of a Method or InstanceKlass that has been regenerated.
155 // renegerated_obj_info = info for the regenerated version of src.
156 SourceObjInfo(address src, SourceObjInfo* renegerated_obj_info) :
157 _ptrmap_start(0), _ptrmap_end(0), _read_only(false),
158 _follow_mode(renegerated_obj_info->_follow_mode),
159 _size_in_bytes(0), _msotype(renegerated_obj_info->_msotype),
160 _source_addr(src), _buffered_addr(renegerated_obj_info->_buffered_addr) {}
161
162 bool should_copy() const { return _follow_mode == make_a_copy; }
163 void set_buffered_addr(address addr) {
164 assert(should_copy(), "must be");
165 assert(_buffered_addr == nullptr, "cannot be copied twice");
166 assert(addr != nullptr, "must be a valid copy");
167 _buffered_addr = addr;
168 }
169 void set_ptrmap_start(uintx v) { _ptrmap_start = v; }
170 void set_ptrmap_end(uintx v) { _ptrmap_end = v; }
171 uintx ptrmap_start() const { return _ptrmap_start; } // inclusive
198 GrowableArray<SourceObjInfo*>* objs() const { return _objs; }
199
200 void append(SourceObjInfo* src_info);
201 void remember_embedded_pointer(SourceObjInfo* pointing_obj, MetaspaceClosure::Ref* ref);
202 void relocate(int i, ArchiveBuilder* builder);
203
204 // convenience accessor
205 SourceObjInfo* at(int i) const { return objs()->at(i); }
206 };
207
208 class CDSMapLogger;
209
210 static const int INITIAL_TABLE_SIZE = 15889;
211 static const int MAX_TABLE_SIZE = 1000000;
212
213 ReservedSpace _shared_rs;
214 VirtualSpace _shared_vs;
215
216 DumpRegion _rw_region;
217 DumpRegion _ro_region;
218 DumpRegion _cc_region;
219
220 // Combined bitmap to track pointers in both RW and RO regions. This is updated
221 // as objects are copied into RW and RO.
222 CHeapBitMap _ptrmap;
223
224 // _ptrmap is split into these two bitmaps which are written into the archive.
225 CHeapBitMap _rw_ptrmap; // marks pointers in the RW region
226 CHeapBitMap _ro_ptrmap; // marks pointers in the RO region
227 CHeapBitMap _cc_ptrmap; // marks pointers in the CC region
228
229 SourceObjList _rw_src_objs; // objs to put in rw region
230 SourceObjList _ro_src_objs; // objs to put in ro region
231 ResizeableResourceHashtable<address, SourceObjInfo, AnyObj::C_HEAP, mtClassShared> _src_obj_table;
232 ResizeableResourceHashtable<address, address, AnyObj::C_HEAP, mtClassShared> _buffered_to_src_table;
233 GrowableArray<Klass*>* _klasses;
234 GrowableArray<Symbol*>* _symbols;
235 unsigned int _entropy_seed;
236
237 // statistics
238 DumpAllocStats _alloc_stats;
239 size_t _total_heap_region_size;
240
241 void print_region_stats(FileMapInfo *map_info, ArchiveHeapInfo* heap_info);
242 void print_bitmap_region_stats(size_t size, size_t total_size);
243 void print_heap_region_stats(ArchiveHeapInfo* heap_info, size_t total_size);
244
245 // For global access.
246 static ArchiveBuilder* _current;
247
248 public:
249 // Use this when you allocate space outside of ArchiveBuilder::dump_{rw,ro}_region.
250 // These are usually for misc tables that are allocated in the RO space.
251 class OtherROAllocMark {
252 char* _oldtop;
253 public:
254 OtherROAllocMark() {
255 _oldtop = _current->_ro_region.top();
256 }
257 ~OtherROAllocMark();
258 };
259
260 private:
261 FollowMode get_follow_mode(MetaspaceClosure::Ref *ref);
262
263 void iterate_sorted_roots(MetaspaceClosure* it);
264 void sort_klasses();
265 static int compare_symbols_by_address(Symbol** a, Symbol** b);
266 static int compare_klass_by_name(Klass** a, Klass** b);
267 void update_hidden_class_loader_type(InstanceKlass* ik) NOT_CDS_JAVA_HEAP_RETURN;
268
269 void make_shallow_copies(DumpRegion *dump_region, const SourceObjList* src_objs);
270 void make_shallow_copy(DumpRegion *dump_region, SourceObjInfo* src_info);
271
272 void relocate_embedded_pointers(SourceObjList* src_objs);
273
274 bool is_excluded(Klass* k);
275 void clean_up_src_obj_table();
276
277 protected:
278 virtual void iterate_roots(MetaspaceClosure* it) = 0;
279
280 // Conservative estimate for number of bytes needed for:
281 size_t _estimated_metaspaceobj_bytes; // all archived MetaspaceObj's.
282 size_t _estimated_hashtable_bytes; // symbol table and dictionaries
283
284 static const int _total_dump_regions = 2;
285
286 size_t estimate_archive_size();
287
288 void start_dump_region(DumpRegion* next);
289 void verify_estimate_size(size_t estimate, const char* which);
290
291 public:
292 address reserve_buffer();
293
294 address buffer_bottom() const { return _buffer_bottom; }
295 address buffer_top() const { return (address)current_dump_region()->top(); }
296 address requested_static_archive_bottom() const { return _requested_static_archive_bottom; }
297 address mapped_static_archive_bottom() const { return _mapped_static_archive_bottom; }
298 intx buffer_to_requested_delta() const { return _buffer_to_requested_delta; }
299
300 bool is_in_buffer_space(address p) const {
301 if (current_dump_region() == nullptr) {
302 return false;
303 }
304 return (buffer_bottom() <= p && p < buffer_top());
305 }
306
307 template <typename T> bool is_in_requested_static_archive(T p) const {
308 return _requested_static_archive_bottom <= (address)p && (address)p < _requested_static_archive_top;
309 }
310
311 template <typename T> bool is_in_mapped_static_archive(T p) const {
312 return _mapped_static_archive_bottom <= (address)p && (address)p < _mapped_static_archive_top;
313 }
314
315 template <typename T> bool is_in_buffer_space(T obj) const {
316 return is_in_buffer_space(address(obj));
317 }
318
319 template <typename T> T to_requested(T obj) const {
320 assert(is_in_buffer_space(obj), "must be");
321 return (T)(address(obj) + _buffer_to_requested_delta);
322 }
323
336 // The address p points to an object inside the output buffer. When the archive is mapped
337 // at the requested address, what's the offset of this object from _requested_static_archive_bottom?
338 uintx buffer_to_offset(address p) const;
339
340 // Same as buffer_to_offset, except that the address p points to either (a) an object
341 // inside the output buffer, or (b), an object in the currently mapped static archive.
342 uintx any_to_offset(address p) const;
343
344 template <typename T>
345 u4 buffer_to_offset_u4(T p) const {
346 uintx offset = buffer_to_offset((address)p);
347 return to_offset_u4(offset);
348 }
349
350 template <typename T>
351 u4 any_to_offset_u4(T p) const {
352 uintx offset = any_to_offset((address)p);
353 return to_offset_u4(offset);
354 }
355
356 public:
357 ArchiveBuilder();
358 ~ArchiveBuilder();
359
360 int entropy();
361 void gather_klasses_and_symbols();
362 void gather_source_objs();
363 bool gather_klass_and_symbol(MetaspaceClosure::Ref* ref, bool read_only);
364 bool gather_one_source_obj(MetaspaceClosure::Ref* ref, bool read_only);
365 void remember_embedded_pointer_in_enclosing_obj(MetaspaceClosure::Ref* ref);
366 static void serialize_dynamic_archivable_items(SerializeClosure* soc);
367
368 DumpRegion* rw_region() { return &_rw_region; }
369 DumpRegion* ro_region() { return &_ro_region; }
370 DumpRegion* cc_region() { return &_cc_region; }
371
372 void start_cc_region();
373 void end_cc_region();
374
375 static char* rw_region_alloc(size_t num_bytes) {
376 return current()->rw_region()->allocate(num_bytes);
377 }
378 static char* ro_region_alloc(size_t num_bytes) {
379 return current()->ro_region()->allocate(num_bytes);
380 }
381 static char* cc_region_alloc(size_t num_bytes) {
382 return current()->cc_region()->allocate(num_bytes);
383 }
384
385 template <typename T>
386 static Array<T>* new_ro_array(int length) {
387 size_t byte_size = Array<T>::byte_sizeof(length, sizeof(T));
388 Array<T>* array = (Array<T>*)ro_region_alloc(byte_size);
389 array->initialize(length);
390 return array;
391 }
392
393 template <typename T>
394 static Array<T>* new_rw_array(int length) {
395 size_t byte_size = Array<T>::byte_sizeof(length, sizeof(T));
396 Array<T>* array = (Array<T>*)rw_region_alloc(byte_size);
397 array->initialize(length);
398 return array;
399 }
400
401 template <typename T>
402 static size_t ro_array_bytesize(int length) {
403 size_t byte_size = Array<T>::byte_sizeof(length, sizeof(T));
404 return align_up(byte_size, SharedSpaceObjectAlignment);
405 }
406
407 char* ro_strdup(const char* s);
408
409 static int compare_src_objs(SourceObjInfo** a, SourceObjInfo** b);
410 void sort_metadata_objs();
411 void dump_rw_metadata();
412 void dump_ro_metadata();
413 void relocate_metaspaceobj_embedded_pointers();
414 void record_regenerated_object(address orig_src_obj, address regen_src_obj);
415 void make_klasses_shareable();
416 void make_training_data_shareable();
417 void relocate_to_requested();
418 void write_archive(FileMapInfo* mapinfo, ArchiveHeapInfo* heap_info);
419 void write_region(FileMapInfo* mapinfo, int region_idx, DumpRegion* dump_region,
420 bool read_only, bool allow_exec);
421
422 void write_pointer_in_buffer(address* ptr_location, address src_addr);
423 template <typename T> void write_pointer_in_buffer(T* ptr_location, T src_addr) {
424 write_pointer_in_buffer((address*)ptr_location, (address)src_addr);
425 }
426
427 void mark_and_relocate_to_buffered_addr(address* ptr_location);
428 template <typename T> void mark_and_relocate_to_buffered_addr(T ptr_location) {
429 mark_and_relocate_to_buffered_addr((address*)ptr_location);
430 }
431
432 bool has_been_archived(address src_addr) const;
433 address get_buffered_addr(address src_addr) const;
434 template <typename T> T get_buffered_addr(T src_addr) const {
435 return (T)get_buffered_addr((address)src_addr);
436 }
437
438 address get_source_addr(address buffered_addr) const;
439 template <typename T> T get_source_addr(T buffered_addr) const {
440 return (T)get_source_addr((address)buffered_addr);
441 }
442
443 // All klasses and symbols that will be copied into the archive
444 GrowableArray<Klass*>* klasses() const { return _klasses; }
445 GrowableArray<Symbol*>* symbols() const { return _symbols; }
446
447 static bool is_active() {
448 CDS_ONLY(return (_current != nullptr));
449 NOT_CDS(return false;)
450 }
451
452 static ArchiveBuilder* current() {
453 assert(_current != nullptr, "ArchiveBuilder must be active");
454 return _current;
455 }
456
457 static DumpAllocStats* alloc_stats() {
458 return &(current()->_alloc_stats);
459 }
460
461 static CompactHashtableStats* symbol_stats() {
462 return alloc_stats()->symbol_stats();
463 }
464
465 static CompactHashtableStats* string_stats() {
466 return alloc_stats()->string_stats();
467 }
468
469 narrowKlass get_requested_narrow_klass(Klass* k);
470
471 static Klass* get_buffered_klass(Klass* src_klass) {
472 Klass* klass = (Klass*)current()->get_buffered_addr((address)src_klass);
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