1 /*
2 * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "ci/ciEnv.hpp"
27 #include "ci/ciMetadata.hpp"
28 #include "cds/cdsConfig.hpp"
29 #include "cds/metaspaceShared.hpp"
30 #include "classfile/classLoaderData.hpp"
31 #include "classfile/compactHashtable.hpp"
32 #include "classfile/javaClasses.hpp"
33 #include "classfile/symbolTable.hpp"
34 #include "classfile/systemDictionaryShared.hpp"
35 #include "compiler/compileTask.hpp"
36 #include "memory/metadataFactory.hpp"
37 #include "memory/metaspaceClosure.hpp"
38 #include "memory/resourceArea.hpp"
39 #include "oops/method.hpp"
40 #include "oops/methodCounters.hpp"
41 #include "oops/recompilationSchedule.hpp"
42 #include "oops/trainingData.hpp"
43 #include "runtime/arguments.hpp"
44 #include "runtime/javaThread.inline.hpp"
45 #include "runtime/jniHandles.inline.hpp"
46 #include "utilities/growableArray.hpp"
47
48 TrainingData::TrainingDataSet TrainingData::_training_data_set(1024, 0x3fffffff);
49 TrainingData::TrainingDataDictionary TrainingData::_archived_training_data_dictionary;
50 TrainingData::TrainingDataDictionary TrainingData::_archived_training_data_dictionary_for_dumping;
51 TrainingData::DumptimeTrainingDataDictionary* TrainingData::_dumptime_training_data_dictionary = nullptr;
52 int TrainingData::TrainingDataLocker::_lock_mode;
53 volatile bool TrainingData::TrainingDataLocker::_snapshot = false;
54
55 MethodTrainingData::MethodTrainingData() {
56 assert(CDSConfig::is_dumping_static_archive() || UseSharedSpaces, "only for CDS");
57 }
58
59 KlassTrainingData::KlassTrainingData() {
60 assert(CDSConfig::is_dumping_static_archive() || UseSharedSpaces, "only for CDS");
61 }
62
63 CompileTrainingData::CompileTrainingData() : _level(-1), _compile_id(-1) {
64 assert(CDSConfig::is_dumping_static_archive() || UseSharedSpaces, "only for CDS");
65 }
66
67 void TrainingData::initialize() {
68 // this is a nop if training modes are not enabled
69 if (have_data() || need_data()) {
70 TrainingDataLocker::initialize();
71 }
72 RecompilationSchedule::initialize();
73 }
74
75 #if INCLUDE_CDS
76 static void verify_archived_entry(TrainingData* td, const TrainingData::Key* k) {
77 guarantee(TrainingData::Key::can_compute_cds_hash(k), "");
78 TrainingData* td1 = TrainingData::lookup_archived_training_data(k);
79 guarantee(td == td1, "");
80 }
81 #endif
82
83 void TrainingData::verify() {
84 #if INCLUDE_CDS
85 if (TrainingData::have_data()) {
86 archived_training_data_dictionary()->iterate([&](TrainingData* td) {
87 if (td->is_KlassTrainingData()) {
88 KlassTrainingData* ktd = td->as_KlassTrainingData();
89 if (ktd->has_holder() && ktd->holder()->is_loaded()) {
90 Key k(ktd->holder());
91 verify_archived_entry(td, &k);
92 }
93 ktd->verify();
94 } else if (td->is_MethodTrainingData()) {
95 MethodTrainingData* mtd = td->as_MethodTrainingData();
96 if (mtd->has_holder() && mtd->holder()->method_holder()->is_loaded()) {
97 Key k(mtd->holder());
98 verify_archived_entry(td, &k);
99 }
100 mtd->verify();
101 } else if (td->is_CompileTrainingData()) {
102 td->as_CompileTrainingData()->verify();
103 }
104 });
105 }
106 #endif
107 }
108
109 MethodTrainingData* MethodTrainingData::make(const methodHandle& method,
110 bool null_if_not_found) {
111 MethodTrainingData* mtd = nullptr;
112 if (!have_data() && !need_data()) {
113 return mtd;
114 }
115 // Try grabbing the cached value first.
116 MethodCounters* mcs = method->method_counters();
117 if (mcs != nullptr) {
118 mtd = mcs->method_training_data();
119 if (mtd != nullptr) {
120 return mtd;
121 }
122 } else {
123 mcs = Method::build_method_counters(Thread::current(), method());
124 }
125
126 KlassTrainingData* holder = KlassTrainingData::make(method->method_holder(), null_if_not_found);
127 if (holder == nullptr) {
128 return nullptr; // allocation failure
129 }
130 Key key(method());
131 TrainingData* td = CDS_ONLY(have_data() ? lookup_archived_training_data(&key) :) nullptr;
132 if (td != nullptr) {
133 mtd = td->as_MethodTrainingData();
134 method->init_training_data(mtd); // Cache the pointer for next time.
135 return mtd;
136 } else {
137 TrainingDataLocker l;
138 td = training_data_set()->find(&key);
139 if (td == nullptr && null_if_not_found) {
140 return nullptr;
141 }
142 if (td != nullptr) {
143 mtd = td->as_MethodTrainingData();
144 method->init_training_data(mtd); // Cache the pointer for next time.
145 return mtd;
146 }
147 }
148 assert(td == nullptr && mtd == nullptr && !null_if_not_found, "Should return if have result");
149 KlassTrainingData* ktd = KlassTrainingData::make(method->method_holder());
150 if (ktd != nullptr) {
151 TrainingDataLocker l;
152 td = training_data_set()->find(&key);
153 if (td == nullptr) {
154 mtd = MethodTrainingData::allocate(method(), ktd);
155 if (mtd == nullptr) {
156 return nullptr; // allocation failure
157 }
158 td = training_data_set()->install(mtd);
159 assert(td == mtd, "");
160 } else {
161 mtd = td->as_MethodTrainingData();
162 }
163 method->init_training_data(mtd);
164 }
165 return mtd;
166 }
167
168 void MethodTrainingData::print_on(outputStream* st, bool name_only) const {
169 if (has_holder()) {
170 _klass->print_on(st, true);
171 st->print(".");
172 name()->print_symbol_on(st);
173 signature()->print_symbol_on(st);
174 }
175 if (name_only) {
176 return;
177 }
178 if (!has_holder()) {
179 st->print("[SYM]");
180 }
181 if (_level_mask) {
182 st->print(" LM%d", _level_mask);
183 }
184 st->print(" mc=%p mdo=%p", _final_counters, _final_profile);
185 }
186
187 CompileTrainingData* CompileTrainingData::make(CompileTask* task) {
188 int level = task->comp_level();
189 int compile_id = task->compile_id();
190 Thread* thread = Thread::current();
191 methodHandle m(thread, task->method());
192 MethodTrainingData* mtd = MethodTrainingData::make(m);
193 if (mtd == nullptr) {
194 return nullptr; // allocation failure
195 }
196 mtd->notice_compilation(level);
197
198 TrainingDataLocker l;
199 CompileTrainingData* ctd = CompileTrainingData::allocate(mtd, level, compile_id);
200 if (ctd != nullptr) {
201 if (mtd->_last_toplevel_compiles[level - 1] != nullptr) {
202 if (mtd->_last_toplevel_compiles[level - 1]->compile_id() < compile_id) {
203 mtd->_last_toplevel_compiles[level - 1]->clear_init_deps();
204 mtd->_last_toplevel_compiles[level - 1] = ctd;
205 mtd->_highest_top_level = MAX2(mtd->_highest_top_level, level);
206 }
207 } else {
208 mtd->_last_toplevel_compiles[level - 1] = ctd;
209 mtd->_highest_top_level = MAX2(mtd->_highest_top_level, level);
210 }
211 }
212 return ctd;
213 }
214
215
216 void CompileTrainingData::dec_init_deps_left(KlassTrainingData* ktd) {
217 LogStreamHandle(Trace, training) log;
218 if (log.is_enabled()) {
219 log.print("CTD "); print_on(&log); log.cr();
220 log.print("KTD "); ktd->print_on(&log); log.cr();
221 }
222 assert(ktd!= nullptr && ktd->has_holder(), "");
223 assert(_init_deps.contains(ktd), "");
224 assert(_init_deps_left > 0, "");
225
226 uint init_deps_left1 = Atomic::sub(&_init_deps_left, 1);
227
228 if (log.is_enabled()) {
229 uint init_deps_left2 = compute_init_deps_left();
230 log.print("init_deps_left: %d (%d)", init_deps_left1, init_deps_left2);
231 ktd->print_on(&log, true);
232 }
233 }
234
235 uint CompileTrainingData::compute_init_deps_left(bool count_initialized) {
236 int left = 0;
237 for (int i = 0; i < _init_deps.length(); i++) {
238 KlassTrainingData* ktd = _init_deps.at(i);
239 // Ignore symbolic refs and already initialized classes (unless explicitly requested).
240 if (ktd->has_holder()) {
241 InstanceKlass* holder = ktd->holder();
242 if (!ktd->holder()->is_initialized() || count_initialized) {
243 ++left;
244 } else if (holder->is_shared_unregistered_class()) {
245 Key k(holder);
246 if (CDS_ONLY(!Key::can_compute_cds_hash(&k)) NOT_CDS(true)) {
247 ++left; // FIXME: !!! init tracking doesn't work well for custom loaders !!!
248 }
249 }
250 }
251 }
252 return left;
253 }
254
255 void CompileTrainingData::print_on(outputStream* st, bool name_only) const {
256 _method->print_on(st, true);
257 st->print("#%dL%d", _compile_id, _level);
258 if (name_only) {
259 return;
260 }
261 if (_init_deps.length() > 0) {
262 if (_init_deps_left > 0) {
263 st->print(" udeps=%d", _init_deps_left);
264 }
265 for (int i = 0, len = _init_deps.length(); i < len; i++) {
266 st->print(" dep:");
267 _init_deps.at(i)->print_on(st, true);
268 }
269 }
270 }
271
272 void CompileTrainingData::notice_inlined_method(CompileTask* task,
273 const methodHandle& method) {
274 MethodTrainingData* mtd = MethodTrainingData::make(method);
275 if (mtd != nullptr) {
276 mtd->notice_compilation(task->comp_level(), true);
277 }
278 }
279
280 void CompileTrainingData::notice_jit_observation(ciEnv* env, ciBaseObject* what) {
281 // A JIT is starting to look at class k.
282 // We could follow the queries that it is making, but it is
283 // simpler to assume, conservatively, that the JIT will
284 // eventually depend on the initialization state of k.
285 CompileTask* task = env->task();
286 assert(task != nullptr, "");
287 Method* method = task->method();
288 InstanceKlass* compiling_klass = method->method_holder();
289 if (what->is_metadata()) {
290 ciMetadata* md = what->as_metadata();
291 if (md->is_loaded() && md->is_instance_klass()) {
292 ciInstanceKlass* cik = md->as_instance_klass();
293
294 if (cik->is_initialized()) {
295 InstanceKlass* ik = md->as_instance_klass()->get_instanceKlass();
296 KlassTrainingData* ktd = KlassTrainingData::make(ik);
297 if (ktd == nullptr) {
298 // Allocation failure or snapshot in progress
299 return;
300 }
301 // This JIT task is (probably) requesting that ik be initialized,
302 // so add him to my _init_deps list.
303 TrainingDataLocker l;
304 add_init_dep(ktd);
305 }
306 }
307 }
308 }
309
310 void KlassTrainingData::prepare(Visitor& visitor) {
311 if (visitor.is_visited(this)) {
312 return;
313 }
314 visitor.visit(this);
315 ClassLoaderData* loader_data = nullptr;
316 if (_holder != nullptr) {
317 loader_data = _holder->class_loader_data();
318 } else {
319 loader_data = java_lang_ClassLoader::loader_data(SystemDictionary::java_system_loader()); // default CLD
320 }
321 _comp_deps.prepare(loader_data);
322 }
323
324 void MethodTrainingData::prepare(Visitor& visitor) {
325 if (visitor.is_visited(this)) {
326 return;
327 }
328 visitor.visit(this);
329 klass()->prepare(visitor);
330 if (has_holder()) {
331 _final_counters = holder()->method_counters();
332 _final_profile = holder()->method_data();
333 assert(_final_profile == nullptr || _final_profile->method() == holder(), "");
334 }
335 for (int i = 0; i < CompLevel_count; i++) {
336 CompileTrainingData* ctd = _last_toplevel_compiles[i];
337 if (ctd != nullptr) {
338 ctd->prepare(visitor);
339 }
340 }
341 }
342
343 void CompileTrainingData::prepare(Visitor& visitor) {
344 if (visitor.is_visited(this)) {
345 return;
346 }
347 visitor.visit(this);
348 method()->prepare(visitor);
349 ClassLoaderData* loader_data = _method->klass()->class_loader_data();
350 _init_deps.prepare(loader_data);
351 _ci_records.prepare(loader_data);
352 }
353
354 KlassTrainingData* KlassTrainingData::make(InstanceKlass* holder, bool null_if_not_found) {
355 Key key(holder);
356 TrainingData* td = CDS_ONLY(have_data() ? lookup_archived_training_data(&key) :) nullptr;
357 KlassTrainingData* ktd = nullptr;
358 if (td != nullptr) {
359 ktd = td->as_KlassTrainingData();
360 guarantee(!ktd->has_holder() || ktd->holder() == holder, "");
361 if (ktd->has_holder()) {
362 return ktd;
363 }
364 }
365 TrainingDataLocker l;
366 td = training_data_set()->find(&key);
367 if (td == nullptr) {
368 if (null_if_not_found) {
369 return nullptr;
370 }
371 ktd = KlassTrainingData::allocate(holder);
372 if (ktd == nullptr) {
373 return nullptr; // allocation failure
374 }
375 td = training_data_set()->install(ktd);
376 assert(ktd == td, "");
377 } else {
378 ktd = td->as_KlassTrainingData();
379 guarantee(ktd->holder() != nullptr, "null holder");
380 }
381 assert(ktd != nullptr, "");
382 guarantee(ktd->holder() == holder, "");
383 return ktd;
384 }
385
386 void KlassTrainingData::print_on(outputStream* st, bool name_only) const {
387 if (has_holder()) {
388 name()->print_symbol_on(st);
389 switch (holder()->init_state()) {
390 case InstanceKlass::allocated: st->print("[A]"); break;
391 case InstanceKlass::loaded: st->print("[D]"); break;
392 case InstanceKlass::linked: st->print("[L]"); break;
393 case InstanceKlass::being_initialized: st->print("[i]"); break;
394 case InstanceKlass::fully_initialized: /*st->print("");*/ break;
395 case InstanceKlass::initialization_error: st->print("[E]"); break;
396 default: fatal("unknown state: %d", holder()->init_state());
397 }
398 if (holder()->is_interface()) {
399 st->print("I");
400 }
401 } else {
402 st->print("[SYM]");
403 }
404 if (name_only) {
405 return;
406 }
407 if (_comp_deps.length() > 0) {
408 for (int i = 0, len = _comp_deps.length(); i < len; i++) {
409 st->print(" dep:");
410 _comp_deps.at(i)->print_on(st, true);
411 }
412 }
413 }
414
415 KlassTrainingData::KlassTrainingData(InstanceKlass* klass) : TrainingData(klass) {
416 if (holder() == klass) {
417 return; // no change to make
418 }
419
420 jobject hmj = _holder_mirror;
421 if (hmj != nullptr) { // clear out previous handle, if any
422 _holder_mirror = nullptr;
423 assert(JNIHandles::is_global_handle(hmj), "");
424 JNIHandles::destroy_global(hmj);
425 }
426
427 // Keep the klass alive during the training run, unconditionally.
428 //
429 // FIXME: Revisit this decision; we could allow training runs to
430 // unload classes in the normal way. We might use make_weak_global
431 // instead of make_global.
432 //
433 // The data from the training run would mention the name of the
434 // unloaded class (and of its loader). Is it worth the complexity
435 // to track and then unload classes, remembering just their names?
436
437 if (klass != nullptr) {
438 Handle hm(JavaThread::current(), klass->java_mirror());
439 hmj = JNIHandles::make_global(hm);
440 Atomic::release_store(&_holder_mirror, hmj);
441 }
442
443 Atomic::release_store(&_holder, const_cast<InstanceKlass*>(klass));
444 assert(holder() == klass, "");
445 }
446
447 void KlassTrainingData::notice_fully_initialized() {
448 ResourceMark rm;
449 assert(has_holder(), "");
450 assert(holder()->is_initialized(), "wrong state: %s %s",
451 holder()->name()->as_C_string(), holder()->init_state_name());
452
453 TrainingDataLocker l; // Not a real lock if we don't collect the data,
454 // that's why we need the atomic decrement below.
455 for (int i = 0; i < comp_dep_count(); i++) {
456 comp_dep(i)->dec_init_deps_left(this);
457 }
458 holder()->set_has_init_deps_processed();
459 }
460
461 void TrainingData::init_dumptime_table(TRAPS) {
462 if (!need_data()) {
463 return;
464 }
465 _dumptime_training_data_dictionary = new DumptimeTrainingDataDictionary();
466 if (CDSConfig::is_dumping_final_static_archive()) {
467 _archived_training_data_dictionary.iterate([&](TrainingData* record) {
468 _dumptime_training_data_dictionary->append(record);
469 });
470 } else {
471 TrainingDataLocker l;
472 TrainingDataLocker::snapshot();
473
474 ResourceMark rm;
475 Visitor visitor(training_data_set()->size());
476 training_data_set()->iterate_all([&](const TrainingData::Key* k, TrainingData* td) {
477 td->prepare(visitor);
478 if (!td->is_CompileTrainingData()) {
479 _dumptime_training_data_dictionary->append(td);
480 }
481 });
482
483 if (VerifyTrainingData) {
484 training_data_set()->verify();
485 }
486 }
487
488 RecompilationSchedule::prepare(CHECK);
489 }
490
491 #if INCLUDE_CDS
492 void TrainingData::iterate_roots(MetaspaceClosure* it) {
493 if (!need_data()) {
494 return;
495 }
496 assert(_dumptime_training_data_dictionary != nullptr, "");
497 for (int i = 0; i < _dumptime_training_data_dictionary->length(); i++) {
498 _dumptime_training_data_dictionary->at(i).metaspace_pointers_do(it);
499 }
500 RecompilationSchedule::iterate_roots(it);
501 }
502
503 void TrainingData::dump_training_data() {
504 if (!need_data()) {
505 return;
506 }
507 write_training_data_dictionary(&_archived_training_data_dictionary_for_dumping);
508 }
509
510 void TrainingData::cleanup_training_data() {
511 if (_dumptime_training_data_dictionary != nullptr) {
512 ResourceMark rm;
513 Visitor visitor(_dumptime_training_data_dictionary->length());
514 for (int i = 0; i < _dumptime_training_data_dictionary->length(); i++) {
515 TrainingData* td = _dumptime_training_data_dictionary->at(i).training_data();
516 td->cleanup(visitor);
517 }
518 // Throw away all elements with empty keys
519 int j = 0;
520 for (int i = 0; i < _dumptime_training_data_dictionary->length(); i++) {
521 TrainingData* td = _dumptime_training_data_dictionary->at(i).training_data();
522 if (td->key()->is_empty()) {
523 continue;
524 }
525 if (i != j) { // no need to copy if it's the same
526 _dumptime_training_data_dictionary->at_put(j, td);
527 }
528 j++;
529 }
530 _dumptime_training_data_dictionary->trunc_to(j);
531 }
532 RecompilationSchedule::cleanup();
533 }
534
535 void KlassTrainingData::cleanup(Visitor& visitor) {
536 if (visitor.is_visited(this)) {
537 return;
538 }
539 visitor.visit(this);
540 if (has_holder()) {
541 bool is_excluded = !holder()->is_loaded() || SystemDictionaryShared::check_for_exclusion(holder(), nullptr);
542 if (is_excluded) {
543 ResourceMark rm;
544 log_debug(cds)("Cleanup KTD %s", name()->as_klass_external_name());
545 _holder = nullptr;
546 key()->make_empty();
547 }
548 }
549 for (int i = 0; i < _comp_deps.length(); i++) {
550 _comp_deps.at(i)->cleanup(visitor);
551 }
552 }
553
554 void MethodTrainingData::cleanup(Visitor& visitor) {
555 if (visitor.is_visited(this)) {
556 return;
557 }
558 visitor.visit(this);
559 if (has_holder()) {
560 if (SystemDictionaryShared::check_for_exclusion(holder()->method_holder(), nullptr)) {
561 log_debug(cds)("Cleanup MTD %s::%s", name()->as_klass_external_name(), signature()->as_utf8());
562 if (_final_profile != nullptr && _final_profile->method() != _holder) {
563 log_warning(cds)("Stale MDO for %s::%s", name()->as_klass_external_name(), signature()->as_utf8());
564 }
565 _holder = nullptr;
566 key()->make_empty();
567 }
568 }
569 for (int i = 0; i < CompLevel_count; i++) {
570 CompileTrainingData* ctd = _last_toplevel_compiles[i];
571 if (ctd != nullptr) {
572 ctd->cleanup(visitor);
573 }
574 }
575 }
576
577 void KlassTrainingData::verify() {
578 for (int i = 0; i < comp_dep_count(); i++) {
579 CompileTrainingData* ctd = comp_dep(i);
580 if (!ctd->_init_deps.contains(this)) {
581 print_on(tty); tty->cr();
582 ctd->print_on(tty); tty->cr();
583 }
584 guarantee(ctd->_init_deps.contains(this), "");
585 }
586 }
587
588 void MethodTrainingData::verify() {
589 iterate_all_compiles([](CompileTrainingData* ctd) {
590 ctd->verify();
591
592 int init_deps_left1 = ctd->init_deps_left();
593 int init_deps_left2 = ctd->compute_init_deps_left();
594
595 if (init_deps_left1 != init_deps_left2) {
596 ctd->print_on(tty); tty->cr();
597 }
598 guarantee(init_deps_left1 == init_deps_left2, "mismatch: %d %d %d",
599 init_deps_left1, init_deps_left2, ctd->init_deps_left());
600 });
601 }
602
603 void CompileTrainingData::verify() {
604 for (int i = 0; i < init_dep_count(); i++) {
605 KlassTrainingData* ktd = init_dep(i);
606 if (ktd->has_holder() && ktd->holder()->is_shared_unregistered_class()) {
607 LogStreamHandle(Warning, training) log;
608 if (log.is_enabled()) {
609 ResourceMark rm;
610 log.print("CTD "); print_value_on(&log);
611 log.print(" depends on unregistered class %s", ktd->holder()->name()->as_C_string());
612 }
613 }
614 if (!ktd->_comp_deps.contains(this)) {
615 print_on(tty); tty->cr();
616 ktd->print_on(tty); tty->cr();
617 }
618 guarantee(ktd->_comp_deps.contains(this), "");
619 }
620 }
621
622 void CompileTrainingData::cleanup(Visitor& visitor) {
623 if (visitor.is_visited(this)) {
624 return;
625 }
626 visitor.visit(this);
627 method()->cleanup(visitor);
628 }
629
630 void TrainingData::serialize_training_data(SerializeClosure* soc) {
631 if (soc->writing()) {
632 _archived_training_data_dictionary_for_dumping.serialize_header(soc);
633 } else {
634 _archived_training_data_dictionary.serialize_header(soc);
635 }
636 RecompilationSchedule::serialize_training_data(soc);
637 }
638
639 void TrainingData::print_archived_training_data_on(outputStream* st) {
640 st->print_cr("Archived TrainingData Dictionary");
641 TrainingDataPrinter tdp(st);
642 TrainingDataLocker::initialize();
643 _archived_training_data_dictionary.iterate(&tdp);
644 RecompilationSchedule::print_archived_training_data_on(st);
645 }
646
647 void TrainingData::Key::metaspace_pointers_do(MetaspaceClosure *iter) {
648 iter->push(const_cast<Metadata**>(&_meta));
649 }
650
651 void TrainingData::metaspace_pointers_do(MetaspaceClosure* iter) {
652 _key.metaspace_pointers_do(iter);
653 }
654
655 bool TrainingData::Key::can_compute_cds_hash(const Key* const& k) {
656 return k->meta() == nullptr || MetaspaceObj::is_shared(k->meta());
657 }
658
659 uint TrainingData::Key::cds_hash(const Key* const& k) {
660 return SystemDictionaryShared::hash_for_shared_dictionary((address)k->meta());
661 }
662
663 void TrainingData::write_training_data_dictionary(TrainingDataDictionary* dictionary) {
664 if (!need_data()) {
665 return;
666 }
667 assert(_dumptime_training_data_dictionary != nullptr, "");
668 CompactHashtableStats stats;
669 dictionary->reset();
670 CompactHashtableWriter writer(_dumptime_training_data_dictionary->length(), &stats);
671 for (int i = 0; i < _dumptime_training_data_dictionary->length(); i++) {
672 TrainingData* td = _dumptime_training_data_dictionary->at(i).training_data();
673 #ifdef ASSERT
674 for (int j = i+1; j < _dumptime_training_data_dictionary->length(); j++) {
675 TrainingData* td1 = _dumptime_training_data_dictionary->at(j).training_data();
676 assert(!TrainingData::Key::equals(td1, td->key(), -1), "conflict");
677 }
678 #endif // ASSERT
679 td = ArchiveBuilder::current()->get_buffered_addr(td);
680 uint hash = TrainingData::Key::cds_hash(td->key());
681 u4 delta = ArchiveBuilder::current()->buffer_to_offset_u4((address)td);
682 writer.add(hash, delta);
683 }
684 writer.dump(dictionary, "training data dictionary");
685 }
686
687 size_t TrainingData::estimate_size_for_archive() {
688 if (_dumptime_training_data_dictionary != nullptr) {
689 return CompactHashtableWriter::estimate_size(_dumptime_training_data_dictionary->length());
690 } else {
691 return 0;
692 }
693 }
694
695 TrainingData* TrainingData::lookup_archived_training_data(const Key* k) {
696 // For this to work, all components of the key must be in shared metaspace.
697 if (!TrainingData::Key::can_compute_cds_hash(k) || _archived_training_data_dictionary.empty()) {
698 return nullptr;
699 }
700 uint hash = TrainingData::Key::cds_hash(k);
701 TrainingData* td = _archived_training_data_dictionary.lookup(k, hash, -1 /*unused*/);
702 if (td != nullptr) {
703 if ((td->is_KlassTrainingData() && td->as_KlassTrainingData()->has_holder()) ||
704 (td->is_MethodTrainingData() && td->as_MethodTrainingData()->has_holder())) {
705 return td;
706 } else {
707 ShouldNotReachHere();
708 }
709 }
710 return nullptr;
711 }
712 #endif
713
714 KlassTrainingData* TrainingData::lookup_for(InstanceKlass* ik) {
715 #if INCLUDE_CDS
716 if (TrainingData::have_data() && ik != nullptr && ik->is_loaded()) {
717 TrainingData::Key key(ik);
718 TrainingData* td = TrainingData::lookup_archived_training_data(&key);
719 if (td != nullptr && td->is_KlassTrainingData()) {
720 return td->as_KlassTrainingData();
721 }
722 }
723 #endif
724 return nullptr;
725 }
726
727 MethodTrainingData* TrainingData::lookup_for(Method* m) {
728 #if INCLUDE_CDS
729 if (TrainingData::have_data() && m != nullptr) {
730 KlassTrainingData* holder_ktd = TrainingData::lookup_for(m->method_holder());
731 if (holder_ktd != nullptr) {
732 TrainingData::Key key(m);
733 TrainingData* td = TrainingData::lookup_archived_training_data(&key);
734 if (td != nullptr && td->is_MethodTrainingData()) {
735 return td->as_MethodTrainingData();
736 }
737 }
738 }
739 #endif
740 return nullptr;
741 }
742
743 template <typename T>
744 void TrainingData::DepList<T>::metaspace_pointers_do(MetaspaceClosure* iter) {
745 iter->push(&_deps);
746 }
747
748 void KlassTrainingData::metaspace_pointers_do(MetaspaceClosure* iter) {
749 log_trace(cds)("Iter(KlassTrainingData): %p", this);
750 #if INCLUDE_CDS
751 TrainingData::metaspace_pointers_do(iter);
752 #endif
753 _comp_deps.metaspace_pointers_do(iter);
754 iter->push(&_holder);
755 }
756
757 void MethodTrainingData::metaspace_pointers_do(MetaspaceClosure* iter) {
758 log_trace(cds)("Iter(MethodTrainingData): %p", this);
759 #if INCLUDE_CDS
760 TrainingData::metaspace_pointers_do(iter);
761 #endif
762 iter->push(&_klass);
763 iter->push((Method**)&_holder);
764 for (int i = 0; i < CompLevel_count; i++) {
765 iter->push(&_last_toplevel_compiles[i]);
766 }
767 iter->push(&_final_profile);
768 iter->push(&_final_counters);
769 }
770
771 void CompileTrainingData::metaspace_pointers_do(MetaspaceClosure* iter) {
772 log_trace(cds)("Iter(CompileTrainingData): %p", this);
773 #if INCLUDE_CDS
774 TrainingData::metaspace_pointers_do(iter);
775 #endif
776 _init_deps.metaspace_pointers_do(iter);
777 _ci_records.metaspace_pointers_do(iter);
778 iter->push(&_method);
779 }
780
781 template <typename T>
782 void TrainingData::DepList<T>::prepare(ClassLoaderData* loader_data) {
783 if (_deps == nullptr && _deps_dyn != nullptr) {
784 int len = _deps_dyn->length();
785 _deps = MetadataFactory::new_array_from_c_heap<T>(len, mtClassShared);
786 for (int i = 0; i < len; i++) {
787 _deps->at_put(i, _deps_dyn->at(i)); // copy
788 }
789 }
790 }
791
792 void TrainingDataPrinter::do_value(TrainingData* td) {
793 #ifdef ASSERT
794 #if INCLUDE_CDS
795 TrainingData::Key key(td->key()->meta());
796 assert(td == TrainingData::archived_training_data_dictionary()->lookup(td->key(), TrainingData::Key::cds_hash(td->key()), -1), "");
797 assert(td == TrainingData::archived_training_data_dictionary()->lookup(&key, TrainingData::Key::cds_hash(&key), -1), "");
798 #endif
799 #endif // ASSERT
800
801 const char* type = (td->is_KlassTrainingData() ? "K" :
802 td->is_MethodTrainingData() ? "M" :
803 td->is_CompileTrainingData() ? "C" : "?");
804 _st->print("%4d: %p %s ", _index++, td, type);
805 td->print_on(_st);
806 _st->cr();
807 if (td->is_KlassTrainingData()) {
808 td->as_KlassTrainingData()->iterate_all_comp_deps([&](CompileTrainingData* ctd) {
809 ResourceMark rm;
810 _st->print_raw(" C ");
811 ctd->print_on(_st);
812 _st->cr();
813 });
814 } else if (td->is_MethodTrainingData()) {
815 td->as_MethodTrainingData()->iterate_all_compiles([&](CompileTrainingData* ctd) {
816 ResourceMark rm;
817 _st->print_raw(" C ");
818 ctd->print_on(_st);
819 _st->cr();
820 });
821 } else if (td->is_CompileTrainingData()) {
822 // ?
823 }
824 }
825
826
827 #if INCLUDE_CDS
828 void KlassTrainingData::remove_unshareable_info() {
829 TrainingData::remove_unshareable_info();
830 _holder_mirror = nullptr;
831 _comp_deps.remove_unshareable_info();
832 }
833
834 void MethodTrainingData::remove_unshareable_info() {
835 TrainingData::remove_unshareable_info();
836 if (_final_counters != nullptr) {
837 _final_counters->remove_unshareable_info();
838 }
839 if (_final_profile != nullptr) {
840 _final_profile->remove_unshareable_info();
841 }
842 }
843
844 void CompileTrainingData::remove_unshareable_info() {
845 TrainingData::remove_unshareable_info();
846 _init_deps.remove_unshareable_info();
847 _ci_records.remove_unshareable_info();
848 _init_deps_left = compute_init_deps_left(true);
849 }
850
851 #endif // INCLUDE_CDS