1 /*
2 * Copyright (c) 2001, 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/ciMetadata.hpp"
27 #include "ci/ciMethodData.hpp"
28 #include "ci/ciReplay.hpp"
29 #include "ci/ciUtilities.inline.hpp"
30 #include "compiler/compiler_globals.hpp"
31 #include "memory/allocation.inline.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "oops/klass.inline.hpp"
34 #include "oops/methodData.inline.hpp"
35 #include "runtime/deoptimization.hpp"
36 #include "utilities/copy.hpp"
37
38 // ciMethodData
39
40 // ------------------------------------------------------------------
41 // ciMethodData::ciMethodData
42 //
43 ciMethodData::ciMethodData(MethodData* md)
44 : ciMetadata(md),
45 _data_size(0), _extra_data_size(0), _data(nullptr),
46 _parameters_data_offset(0),
47 _exception_handlers_data_offset(0),
48 // Set an initial hint. Don't use set_hint_di() because
49 // first_di() may be out of bounds if data_size is 0.
50 _hint_di(first_di()),
51 _state(empty_state),
52 _saw_free_extra_data(false),
53 // Initialize the escape information (to "don't know.");
54 _eflags(0), _arg_local(0), _arg_stack(0), _arg_returned(0),
55 _invocation_counter(0),
56 _orig() {}
57
58 // Check for entries that reference an unloaded method
59 class PrepareExtraDataClosure : public CleanExtraDataClosure {
60 MethodData* _mdo;
61 SafepointStateTracker _safepoint_tracker;
62 GrowableArray<Method*> _uncached_methods;
63
64 public:
65 PrepareExtraDataClosure(MethodData* mdo)
66 : _mdo(mdo),
67 _safepoint_tracker(SafepointSynchronize::safepoint_state_tracker()),
68 _uncached_methods()
69 { }
70
71 bool is_live(Method* m) {
72 if (!m->method_holder()->is_loader_alive()) {
73 return false;
74 }
75 if (CURRENT_ENV->cached_metadata(m) == nullptr) {
76 // Uncached entries need to be pre-populated.
77 _uncached_methods.append(m);
78 }
79 return true;
80 }
81
82 bool has_safepointed() {
83 return _safepoint_tracker.safepoint_state_changed();
84 }
85
86 bool finish() {
87 if (_uncached_methods.length() == 0) {
88 // Preparation finished iff all Methods* were already cached.
89 return true;
90 }
91 // We are currently holding the extra_data_lock and ensuring
92 // no safepoint breaks the lock.
93 _mdo->check_extra_data_locked();
94
95 // We now want to cache some method data. This could cause a safepoint.
96 // We temporarily release the lock and allow safepoints, and revert that
97 // at the end of the scope. This is safe, since we currently do not hold
98 // any extra_method_data: finish is called only after clean_extra_data,
99 // and the outer scope that first aquired the lock should not hold any
100 // extra_method_data while cleaning is performed, as the offsets can change.
101 MutexUnlocker mu(_mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
102
103 for (int i = 0; i < _uncached_methods.length(); ++i) {
104 if (has_safepointed()) {
105 // The metadata in the growable array might contain stale
106 // entries after a safepoint.
107 return false;
108 }
109 Method* method = _uncached_methods.at(i);
110 // Populating ciEnv caches may cause safepoints due
111 // to taking the Compile_lock with safepoint checks.
112 (void)CURRENT_ENV->get_method(method);
113 }
114 return false;
115 }
116 };
117
118 void ciMethodData::prepare_metadata() {
119 MethodData* mdo = get_MethodData();
120
121 for (;;) {
122 ResourceMark rm;
123 PrepareExtraDataClosure cl(mdo);
124 mdo->clean_extra_data(&cl);
125 if (cl.finish()) {
126 // When encountering uncached metadata, the Compile_lock might be
127 // acquired when creating ciMetadata handles, causing safepoints
128 // which requires a new round of preparation to clean out potentially
129 // new unloading metadata.
130 return;
131 }
132 }
133 }
134
135 void ciMethodData::load_remaining_extra_data() {
136 MethodData* mdo = get_MethodData();
137
138 // Lock to read ProfileData, and ensure lock is not unintentionally broken by a safepoint
139 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
140
141 // Deferred metadata cleaning due to concurrent class unloading.
142 prepare_metadata();
143 // After metadata preparation, there is no stale metadata,
144 // and no safepoints can introduce more stale metadata.
145 NoSafepointVerifier no_safepoint;
146
147 assert((mdo->data_size() == _data_size) && (mdo->extra_data_size() == _extra_data_size), "sanity, unchanged");
148 assert(extra_data_base() == (DataLayout*)((address) _data + _data_size), "sanity");
149
150 // Copy the extra data once it is prepared (i.e. cache populated, no release of extra data lock anymore)
151 Copy::disjoint_words_atomic((HeapWord*) mdo->extra_data_base(),
152 (HeapWord*) extra_data_base(),
153 // copy everything from extra_data_base() up to parameters_data_base()
154 pointer_delta(parameters_data_base(), extra_data_base(), HeapWordSize));
155
156 // skip parameter data copying. Already done in 'load_data'
157
158 // copy exception handler data
159 Copy::disjoint_words_atomic((HeapWord*) mdo->exception_handler_data_base(),
160 (HeapWord*) exception_handler_data_base(),
161 exception_handler_data_size() / HeapWordSize);
162
163 // speculative trap entries also hold a pointer to a Method so need to be translated
164 DataLayout* dp_src = mdo->extra_data_base();
165 DataLayout* end_src = mdo->args_data_limit();
166 DataLayout* dp_dst = extra_data_base();
167 for (;; dp_src = MethodData::next_extra(dp_src), dp_dst = MethodData::next_extra(dp_dst)) {
168 assert(dp_src < end_src, "moved past end of extra data");
169 assert(((intptr_t)dp_dst) - ((intptr_t)extra_data_base()) == ((intptr_t)dp_src) - ((intptr_t)mdo->extra_data_base()), "source and destination don't match");
170
171 int tag = dp_src->tag();
172 switch(tag) {
173 case DataLayout::speculative_trap_data_tag: {
174 ciSpeculativeTrapData data_dst(dp_dst);
175 SpeculativeTrapData data_src(dp_src);
176 data_dst.translate_from(&data_src);
177 break;
178 }
179 case DataLayout::bit_data_tag:
180 break;
181 case DataLayout::no_tag:
182 case DataLayout::arg_info_data_tag:
183 // An empty slot or ArgInfoData entry marks the end of the trap data
184 {
185 return; // Need a block to avoid SS compiler bug
186 }
187 default:
188 fatal("bad tag = %d", tag);
189 }
190 }
191 }
192
193 bool ciMethodData::load_data() {
194 MethodData* mdo = get_MethodData();
195 if (mdo == nullptr) {
196 return false;
197 }
198
199 // To do: don't copy the data if it is not "ripe" -- require a minimum #
200 // of invocations.
201
202 // Snapshot the data and extra parameter data first without the extra trap and arg info data.
203 // Those are copied in a second step. Actually, an approximate snapshot of the data is taken.
204 // Any concurrently executing threads may be changing the data as we copy it.
205 //
206 // The first snapshot step requires two copies (data entries and parameter data entries) since
207 // the MDO is laid out as follows:
208 //
209 // data_base: ---------------------------
210 // | data entries |
211 // | ... |
212 // extra_data_base: ---------------------------
213 // | trap data entries |
214 // | ... |
215 // | one arg info data entry |
216 // | data for each arg |
217 // | ... |
218 // args_data_limit: ---------------------------
219 // | parameter data entries |
220 // | ... |
221 // param_data_limit: ---------------------------
222 // | ex handler data entries |
223 // | ... |
224 // extra_data_limit: ---------------------------
225 //
226 // _data_size = extra_data_base - data_base
227 // _extra_data_size = extra_data_limit - extra_data_base
228 // total_size = _data_size + _extra_data_size
229 // args_data_limit = param_data_base
230 // param_data_limit = exception_handler_data_base
231 // extra_data_limit = extra_data_limit
232
233 #ifndef ZERO
234 // Some Zero platforms do not have expected alignment, and do not use
235 // this code. static_assert would still fire and fail for them.
236 static_assert(sizeof(_orig) % HeapWordSize == 0, "align");
237 #endif
238 Copy::disjoint_words_atomic((HeapWord*) &mdo->_compiler_counters,
239 (HeapWord*) &_orig,
240 sizeof(_orig) / HeapWordSize);
241 Arena* arena = CURRENT_ENV->arena();
242 _data_size = mdo->data_size();
243 _extra_data_size = mdo->extra_data_size();
244 int total_size = _data_size + _extra_data_size;
245 _data = (intptr_t *) arena->Amalloc(total_size);
246 Copy::disjoint_words_atomic((HeapWord*) mdo->data_base(),
247 (HeapWord*) _data,
248 _data_size / HeapWordSize);
249 // Copy offsets. This is used below
250 _parameters_data_offset = mdo->parameters_type_data_di();
251 _exception_handlers_data_offset = mdo->exception_handlers_data_di();
252
253 int parameters_data_size = mdo->parameters_size_in_bytes();
254 if (parameters_data_size > 0) {
255 // Snapshot the parameter data
256 Copy::disjoint_words_atomic((HeapWord*) mdo->parameters_data_base(),
257 (HeapWord*) parameters_data_base(),
258 parameters_data_size / HeapWordSize);
259 }
260 // Traverse the profile data, translating any oops into their
261 // ci equivalents.
262 ResourceMark rm;
263 ciProfileData* ci_data = first_data();
264 ProfileData* data = mdo->first_data();
265 while (is_valid(ci_data)) {
266 ci_data->translate_from(data);
267 ci_data = next_data(ci_data);
268 data = mdo->next_data(data);
269 }
270 if (mdo->parameters_type_data() != nullptr) {
271 DataLayout* parameters_data = data_layout_at(_parameters_data_offset);
272 ciParametersTypeData* parameters = new ciParametersTypeData(parameters_data);
273 parameters->translate_from(mdo->parameters_type_data());
274 }
275
276 assert((DataLayout*) ((address)_data + total_size - parameters_data_size - exception_handler_data_size()) == args_data_limit(),
277 "sanity - parameter data starts after the argument data of the single ArgInfoData entry");
278 load_remaining_extra_data();
279
280 // Note: Extra data are all BitData, and do not need translation.
281 _invocation_counter = mdo->invocation_count();
282 if (_invocation_counter == 0 && mdo->backedge_count() > 0) {
283 // Avoid skewing counter data during OSR compilation.
284 // Sometimes, MDO is allocated during the very first invocation and OSR compilation is triggered
285 // solely by backedge counter while invocation counter stays zero. In such case, it's important
286 // to observe non-zero invocation count to properly scale profile counts (see ciMethod::scale_count()).
287 _invocation_counter = 1;
288 }
289
290 _state = mdo->is_mature() ? mature_state : immature_state;
291 _eflags = mdo->eflags();
292 _arg_local = mdo->arg_local();
293 _arg_stack = mdo->arg_stack();
294 _arg_returned = mdo->arg_returned();
295 if (ReplayCompiles) {
296 ciReplay::initialize(this);
297 if (is_empty()) {
298 return false;
299 }
300 }
301 return true;
302 }
303
304 void ciReceiverTypeData::translate_receiver_data_from(const ProfileData* data) {
305 for (uint row = 0; row < row_limit(); row++) {
306 Klass* k = data->as_ReceiverTypeData()->receiver(row);
307 if (k != nullptr) {
308 if (k->is_loader_alive()) {
309 ciKlass* klass = CURRENT_ENV->get_klass(k);
310 set_receiver(row, klass);
311 } else {
312 // With concurrent class unloading, the MDO could have stale metadata; override it
313 clear_row(row);
314 }
315 } else {
316 set_receiver(row, nullptr);
317 }
318 }
319 }
320
321 void ciTypeStackSlotEntries::translate_type_data_from(const TypeStackSlotEntries* entries) {
322 for (int i = 0; i < number_of_entries(); i++) {
323 intptr_t k = entries->type(i);
324 Klass* klass = (Klass*)klass_part(k);
325 if (klass != nullptr && !klass->is_loader_alive()) {
326 // With concurrent class unloading, the MDO could have stale metadata; override it
327 TypeStackSlotEntries::set_type(i, TypeStackSlotEntries::with_status((Klass*)nullptr, k));
328 } else {
329 TypeStackSlotEntries::set_type(i, translate_klass(k));
330 }
331 }
332 }
333
334 void ciSingleTypeEntry::translate_type_data_from(const SingleTypeEntry* ret) {
335 intptr_t k = ret->type();
336 Klass* klass = (Klass*)klass_part(k);
337 if (klass != nullptr && !klass->is_loader_alive()) {
338 // With concurrent class unloading, the MDO could have stale metadata; override it
339 set_type(SingleTypeEntry::with_status((Klass*)nullptr, k));
340 } else {
341 set_type(translate_klass(k));
342 }
343 }
344
345 void ciSpeculativeTrapData::translate_from(const ProfileData* data) {
346 Method* m = data->as_SpeculativeTrapData()->method();
347 ciMethod* ci_m = CURRENT_ENV->get_method(m);
348 set_method(ci_m);
349 }
350
351 // Get the data at an arbitrary (sort of) data index.
352 ciProfileData* ciMethodData::data_at(int data_index) {
353 if (out_of_bounds(data_index)) {
354 return nullptr;
355 }
356 DataLayout* data_layout = data_layout_at(data_index);
357 return data_from(data_layout);
358 }
359
360 ciProfileData* ciMethodData::data_from(DataLayout* data_layout) {
361 switch (data_layout->tag()) {
362 case DataLayout::no_tag:
363 default:
364 ShouldNotReachHere();
365 return nullptr;
366 case DataLayout::bit_data_tag:
367 return new ciBitData(data_layout);
368 case DataLayout::counter_data_tag:
369 return new ciCounterData(data_layout);
370 case DataLayout::jump_data_tag:
371 return new ciJumpData(data_layout);
372 case DataLayout::receiver_type_data_tag:
373 return new ciReceiverTypeData(data_layout);
374 case DataLayout::virtual_call_data_tag:
375 return new ciVirtualCallData(data_layout);
376 case DataLayout::ret_data_tag:
377 return new ciRetData(data_layout);
378 case DataLayout::branch_data_tag:
379 return new ciBranchData(data_layout);
380 case DataLayout::multi_branch_data_tag:
381 return new ciMultiBranchData(data_layout);
382 case DataLayout::arg_info_data_tag:
383 return new ciArgInfoData(data_layout);
384 case DataLayout::call_type_data_tag:
385 return new ciCallTypeData(data_layout);
386 case DataLayout::virtual_call_type_data_tag:
387 return new ciVirtualCallTypeData(data_layout);
388 case DataLayout::parameters_type_data_tag:
389 return new ciParametersTypeData(data_layout);
390 case DataLayout::array_store_data_tag:
391 return new ciArrayStoreData(data_layout);
392 case DataLayout::array_load_data_tag:
393 return new ciArrayLoadData(data_layout);
394 case DataLayout::acmp_data_tag:
395 return new ciACmpData(data_layout);
396 };
397 }
398
399 // Iteration over data.
400 ciProfileData* ciMethodData::next_data(ciProfileData* current) {
401 int current_index = dp_to_di(current->dp());
402 int next_index = current_index + current->size_in_bytes();
403 ciProfileData* next = data_at(next_index);
404 return next;
405 }
406
407 DataLayout* ciMethodData::next_data_layout_helper(DataLayout* current, bool extra) {
408 int current_index = dp_to_di((address)current);
409 int next_index = current_index + current->size_in_bytes();
410 if (extra ? out_of_bounds_extra(next_index) : out_of_bounds(next_index)) {
411 return nullptr;
412 }
413 DataLayout* next = data_layout_at(next_index);
414 return next;
415 }
416
417 DataLayout* ciMethodData::next_data_layout(DataLayout* current) {
418 return next_data_layout_helper(current, false);
419 }
420
421 DataLayout* ciMethodData::next_extra_data_layout(DataLayout* current) {
422 return next_data_layout_helper(current, true);
423 }
424
425 ciProfileData* ciMethodData::bci_to_extra_data(int bci, ciMethod* m, bool& two_free_slots) {
426 DataLayout* dp = extra_data_base();
427 DataLayout* end = args_data_limit();
428 two_free_slots = false;
429 for (;dp < end; dp = MethodData::next_extra(dp)) {
430 switch(dp->tag()) {
431 case DataLayout::no_tag:
432 _saw_free_extra_data = true; // observed an empty slot (common case)
433 two_free_slots = (MethodData::next_extra(dp)->tag() == DataLayout::no_tag);
434 return nullptr;
435 case DataLayout::arg_info_data_tag:
436 return nullptr; // ArgInfoData is after the trap data right before the parameter data.
437 case DataLayout::bit_data_tag:
438 if (m == nullptr && dp->bci() == bci) {
439 return new ciBitData(dp);
440 }
441 break;
442 case DataLayout::speculative_trap_data_tag: {
443 ciSpeculativeTrapData* data = new ciSpeculativeTrapData(dp);
444 // data->method() might be null if the MDO is snapshotted
445 // concurrently with a trap
446 if (m != nullptr && data->method() == m && dp->bci() == bci) {
447 return data;
448 }
449 break;
450 }
451 default:
452 fatal("bad tag = %d", dp->tag());
453 }
454 }
455 return nullptr;
456 }
457
458 // Translate a bci to its corresponding data, or nullptr.
459 ciProfileData* ciMethodData::bci_to_data(int bci, ciMethod* m) {
460 // If m is not nullptr we look for a SpeculativeTrapData entry
461 if (m == nullptr) {
462 DataLayout* data_layout = data_layout_before(bci);
463 for ( ; is_valid(data_layout); data_layout = next_data_layout(data_layout)) {
464 if (data_layout->bci() == bci) {
465 set_hint_di(dp_to_di((address)data_layout));
466 return data_from(data_layout);
467 } else if (data_layout->bci() > bci) {
468 break;
469 }
470 }
471 }
472 bool two_free_slots = false;
473 ciProfileData* result = bci_to_extra_data(bci, m, two_free_slots);
474 if (result != nullptr) {
475 return result;
476 }
477 if (m != nullptr && !two_free_slots) {
478 // We were looking for a SpeculativeTrapData entry we didn't
479 // find. Room is not available for more SpeculativeTrapData
480 // entries, look in the non SpeculativeTrapData entries.
481 return bci_to_data(bci, nullptr);
482 }
483 return nullptr;
484 }
485
486 ciBitData ciMethodData::exception_handler_bci_to_data(int bci) {
487 assert(ProfileExceptionHandlers, "not profiling");
488 assert(_data != nullptr, "must be initialized");
489 for (DataLayout* data = exception_handler_data_base(); data < exception_handler_data_limit(); data = next_extra_data_layout(data)) {
490 assert(data != nullptr, "out of bounds?");
491 if (data->bci() == bci) {
492 return ciBitData(data);
493 }
494 }
495 // called with invalid bci or wrong Method/MethodData
496 ShouldNotReachHere();
497 return ciBitData(nullptr);
498 }
499
500 // Conservatively decode the trap_state of a ciProfileData.
501 int ciMethodData::has_trap_at(ciProfileData* data, int reason) {
502 typedef Deoptimization::DeoptReason DR_t;
503 int per_bc_reason
504 = Deoptimization::reason_recorded_per_bytecode_if_any((DR_t) reason);
505 if (trap_count(reason) == 0) {
506 // Impossible for this trap to have occurred, regardless of trap_state.
507 // Note: This happens if the MDO is empty.
508 return 0;
509 } else if (per_bc_reason == Deoptimization::Reason_none) {
510 // We cannot conclude anything; a trap happened somewhere, maybe here.
511 return -1;
512 } else if (data == nullptr) {
513 // No profile here, not even an extra_data record allocated on the fly.
514 // If there are empty extra_data records, and there had been a trap,
515 // there would have been a non-null data pointer. If there are no
516 // free extra_data records, we must return a conservative -1.
517 if (_saw_free_extra_data)
518 return 0; // Q.E.D.
519 else
520 return -1; // bail with a conservative answer
521 } else {
522 return Deoptimization::trap_state_has_reason(data->trap_state(), per_bc_reason);
523 }
524 }
525
526 int ciMethodData::trap_recompiled_at(ciProfileData* data) {
527 if (data == nullptr) {
528 return (_saw_free_extra_data? 0: -1); // (see previous method)
529 } else {
530 return Deoptimization::trap_state_is_recompiled(data->trap_state())? 1: 0;
531 }
532 }
533
534 void ciMethodData::clear_escape_info() {
535 VM_ENTRY_MARK;
536 MethodData* mdo = get_MethodData();
537 if (mdo != nullptr) {
538 mdo->clear_escape_info();
539 ArgInfoData *aid = arg_info();
540 int arg_count = (aid == nullptr) ? 0 : aid->number_of_args();
541 for (int i = 0; i < arg_count; i++) {
542 set_arg_modified(i, 0);
543 }
544 }
545 _eflags = _arg_local = _arg_stack = _arg_returned = 0;
546 }
547
548 // copy our escape info to the MethodData* if it exists
549 void ciMethodData::update_escape_info() {
550 VM_ENTRY_MARK;
551 MethodData* mdo = get_MethodData();
552 if ( mdo != nullptr) {
553 mdo->set_eflags(_eflags);
554 mdo->set_arg_local(_arg_local);
555 mdo->set_arg_stack(_arg_stack);
556 mdo->set_arg_returned(_arg_returned);
557 int arg_count = mdo->method()->size_of_parameters();
558 for (int i = 0; i < arg_count; i++) {
559 mdo->set_arg_modified(i, arg_modified(i));
560 }
561 }
562 }
563
564 void ciMethodData::set_compilation_stats(short loops, short blocks) {
565 VM_ENTRY_MARK;
566 MethodData* mdo = get_MethodData();
567 if (mdo != nullptr) {
568 mdo->set_num_loops(loops);
569 mdo->set_num_blocks(blocks);
570 }
571 }
572
573 void ciMethodData::set_would_profile(bool p) {
574 VM_ENTRY_MARK;
575 MethodData* mdo = get_MethodData();
576 if (mdo != nullptr) {
577 mdo->set_would_profile(p);
578 }
579 }
580
581 void ciMethodData::set_argument_type(int bci, int i, ciKlass* k) {
582 VM_ENTRY_MARK;
583 MethodData* mdo = get_MethodData();
584 if (mdo != nullptr) {
585 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
586 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
587
588 ProfileData* data = mdo->bci_to_data(bci);
589 if (data != nullptr) {
590 if (data->is_CallTypeData()) {
591 data->as_CallTypeData()->set_argument_type(i, k->get_Klass());
592 } else {
593 assert(data->is_VirtualCallTypeData(), "no arguments!");
594 data->as_VirtualCallTypeData()->set_argument_type(i, k->get_Klass());
595 }
596 }
597 }
598 }
599
600 void ciMethodData::set_parameter_type(int i, ciKlass* k) {
601 VM_ENTRY_MARK;
602 MethodData* mdo = get_MethodData();
603 if (mdo != nullptr) {
604 mdo->parameters_type_data()->set_type(i, k->get_Klass());
605 }
606 }
607
608 void ciMethodData::set_return_type(int bci, ciKlass* k) {
609 VM_ENTRY_MARK;
610 MethodData* mdo = get_MethodData();
611 if (mdo != nullptr) {
612 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
613 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
614
615 ProfileData* data = mdo->bci_to_data(bci);
616 if (data != nullptr) {
617 if (data->is_CallTypeData()) {
618 data->as_CallTypeData()->set_return_type(k->get_Klass());
619 } else {
620 assert(data->is_VirtualCallTypeData(), "no arguments!");
621 data->as_VirtualCallTypeData()->set_return_type(k->get_Klass());
622 }
623 }
624 }
625 }
626
627 bool ciMethodData::has_escape_info() {
628 return eflag_set(MethodData::estimated);
629 }
630
631 void ciMethodData::set_eflag(MethodData::EscapeFlag f) {
632 set_bits(_eflags, f);
633 }
634
635 bool ciMethodData::eflag_set(MethodData::EscapeFlag f) const {
636 return mask_bits(_eflags, f) != 0;
637 }
638
639 void ciMethodData::set_arg_local(int i) {
640 set_nth_bit(_arg_local, i);
641 }
642
643 void ciMethodData::set_arg_stack(int i) {
644 set_nth_bit(_arg_stack, i);
645 }
646
647 void ciMethodData::set_arg_returned(int i) {
648 set_nth_bit(_arg_returned, i);
649 }
650
651 void ciMethodData::set_arg_modified(int arg, uint val) {
652 ArgInfoData *aid = arg_info();
653 if (aid == nullptr)
654 return;
655 assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number");
656 aid->set_arg_modified(arg, val);
657 }
658
659 bool ciMethodData::is_arg_local(int i) const {
660 return is_set_nth_bit(_arg_local, i);
661 }
662
663 bool ciMethodData::is_arg_stack(int i) const {
664 return is_set_nth_bit(_arg_stack, i);
665 }
666
667 bool ciMethodData::is_arg_returned(int i) const {
668 return is_set_nth_bit(_arg_returned, i);
669 }
670
671 uint ciMethodData::arg_modified(int arg) const {
672 ArgInfoData *aid = arg_info();
673 if (aid == nullptr)
674 return 0;
675 assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number");
676 return aid->arg_modified(arg);
677 }
678
679 ciParametersTypeData* ciMethodData::parameters_type_data() const {
680 return parameter_data_size() != 0 ? new ciParametersTypeData(data_layout_at(_parameters_data_offset)) : nullptr;
681 }
682
683 ByteSize ciMethodData::offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data) {
684 // Get offset within MethodData* of the data array
685 ByteSize data_offset = MethodData::data_offset();
686
687 // Get cell offset of the ProfileData within data array
688 int cell_offset = dp_to_di(data->dp());
689
690 // Add in counter_offset, the # of bytes into the ProfileData of counter or flag
691 int offset = in_bytes(data_offset) + cell_offset + in_bytes(slot_offset_in_data);
692
693 return in_ByteSize(offset);
694 }
695
696 ciArgInfoData *ciMethodData::arg_info() const {
697 // Should be last, have to skip all traps.
698 DataLayout* dp = extra_data_base();
699 DataLayout* end = args_data_limit();
700 for (; dp < end; dp = MethodData::next_extra(dp)) {
701 if (dp->tag() == DataLayout::arg_info_data_tag)
702 return new ciArgInfoData(dp);
703 }
704 return nullptr;
705 }
706
707
708 // Implementation of the print method.
709 void ciMethodData::print_impl(outputStream* st) {
710 ciMetadata::print_impl(st);
711 }
712
713 void ciMethodData::dump_replay_data_type_helper(outputStream* out, int round, int& count, ProfileData* pdata, ByteSize offset, ciKlass* k) {
714 if (k != nullptr) {
715 if (round == 0) {
716 count++;
717 } else {
718 out->print(" %d %s", (int)(dp_to_di(pdata->dp() + in_bytes(offset)) / sizeof(intptr_t)),
719 CURRENT_ENV->replay_name(k));
720 }
721 }
722 }
723
724 template<class T> void ciMethodData::dump_replay_data_receiver_type_helper(outputStream* out, int round, int& count, T* vdata) {
725 for (uint i = 0; i < vdata->row_limit(); i++) {
726 dump_replay_data_type_helper(out, round, count, vdata, vdata->receiver_offset(i), vdata->receiver(i));
727 }
728 }
729
730 template<class T> void ciMethodData::dump_replay_data_call_type_helper(outputStream* out, int round, int& count, T* call_type_data) {
731 if (call_type_data->has_arguments()) {
732 for (int i = 0; i < call_type_data->number_of_arguments(); i++) {
733 dump_replay_data_type_helper(out, round, count, call_type_data, call_type_data->argument_type_offset(i), call_type_data->valid_argument_type(i));
734 }
735 }
736 if (call_type_data->has_return()) {
737 dump_replay_data_type_helper(out, round, count, call_type_data, call_type_data->return_type_offset(), call_type_data->valid_return_type());
738 }
739 }
740
741 void ciMethodData::dump_replay_data_extra_data_helper(outputStream* out, int round, int& count) {
742 DataLayout* dp = extra_data_base();
743 DataLayout* end = args_data_limit();
744
745 for (;dp < end; dp = MethodData::next_extra(dp)) {
746 switch(dp->tag()) {
747 case DataLayout::no_tag:
748 case DataLayout::arg_info_data_tag:
749 return;
750 case DataLayout::bit_data_tag:
751 break;
752 case DataLayout::speculative_trap_data_tag: {
753 ciSpeculativeTrapData* data = new ciSpeculativeTrapData(dp);
754 ciMethod* m = data->method();
755 if (m != nullptr) {
756 if (round == 0) {
757 count++;
758 } else {
759 out->print(" %d ", (int)(dp_to_di(((address)dp) + in_bytes(ciSpeculativeTrapData::method_offset())) / sizeof(intptr_t)));
760 m->dump_name_as_ascii(out);
761 }
762 }
763 break;
764 }
765 default:
766 fatal("bad tag = %d", dp->tag());
767 }
768 }
769 }
770
771 void ciMethodData::dump_replay_data(outputStream* out) {
772 ResourceMark rm;
773 MethodData* mdo = get_MethodData();
774 Method* method = mdo->method();
775 out->print("ciMethodData ");
776 ciMethod::dump_name_as_ascii(out, method);
777 out->print(" %d %d", _state, _invocation_counter);
778
779 // dump the contents of the MDO header as raw data
780 unsigned char* orig = (unsigned char*)&_orig;
781 int length = sizeof(_orig);
782 out->print(" orig %d", length);
783 for (int i = 0; i < length; i++) {
784 out->print(" %d", orig[i]);
785 }
786
787 // dump the MDO data as raw data
788 int elements = (data_size() + extra_data_size()) / sizeof(intptr_t);
789 out->print(" data %d", elements);
790 for (int i = 0; i < elements; i++) {
791 // We could use INTPTR_FORMAT here but that's zero justified
792 // which makes comparing it with the SA version of this output
793 // harder. data()'s element type is intptr_t.
794 out->print(" " INTX_FORMAT_X, data()[i]);
795 }
796
797 // The MDO contained oop references as ciObjects, so scan for those
798 // and emit pairs of offset and klass name so that they can be
799 // reconstructed at runtime. The first round counts the number of
800 // oop references and the second actually emits them.
801 ciParametersTypeData* parameters = parameters_type_data();
802 for (int count = 0, round = 0; round < 2; round++) {
803 if (round == 1) out->print(" oops %d", count);
804 ProfileData* pdata = first_data();
805 for ( ; is_valid(pdata); pdata = next_data(pdata)) {
806 if (pdata->is_VirtualCallData()) {
807 ciVirtualCallData* vdata = (ciVirtualCallData*)pdata;
808 dump_replay_data_receiver_type_helper<ciVirtualCallData>(out, round, count, vdata);
809 if (pdata->is_VirtualCallTypeData()) {
810 ciVirtualCallTypeData* call_type_data = (ciVirtualCallTypeData*)pdata;
811 dump_replay_data_call_type_helper<ciVirtualCallTypeData>(out, round, count, call_type_data);
812 }
813 } else if (pdata->is_CallTypeData()) {
814 ciCallTypeData* call_type_data = (ciCallTypeData*)pdata;
815 dump_replay_data_call_type_helper<ciCallTypeData>(out, round, count, call_type_data);
816 } else if (pdata->is_ArrayStoreData()) {
817 ciArrayStoreData* array_store_data = (ciArrayStoreData*)pdata;
818 dump_replay_data_type_helper(out, round, count, array_store_data, ciArrayStoreData::array_offset(),
819 array_store_data->array()->valid_type());
820 dump_replay_data_receiver_type_helper<ciArrayStoreData>(out, round, count, array_store_data);
821 } else if (pdata->is_ArrayLoadData()) {
822 ciArrayLoadData* array_load_data = (ciArrayLoadData*)pdata;
823 dump_replay_data_type_helper(out, round, count, array_load_data, ciArrayLoadData::array_offset(),
824 array_load_data->array()->valid_type());
825 dump_replay_data_type_helper(out, round, count, array_load_data, ciArrayLoadData::element_offset(),
826 array_load_data->element()->valid_type());
827 } else if (pdata->is_ACmpData()) {
828 ciACmpData* acmp_data = (ciACmpData*)pdata;
829 dump_replay_data_type_helper(out, round, count, acmp_data, ciACmpData::left_offset(),
830 acmp_data->left()->valid_type());
831 dump_replay_data_type_helper(out, round, count, acmp_data, ciACmpData::right_offset(),
832 acmp_data->right()->valid_type());
833 } else if (pdata->is_ReceiverTypeData()) {
834 ciReceiverTypeData* vdata = (ciReceiverTypeData*)pdata;
835 dump_replay_data_receiver_type_helper<ciReceiverTypeData>(out, round, count, vdata);
836 }
837 }
838 if (parameters != nullptr) {
839 for (int i = 0; i < parameters->number_of_parameters(); i++) {
840 dump_replay_data_type_helper(out, round, count, parameters, ParametersTypeData::type_offset(i), parameters->valid_parameter_type(i));
841 }
842 }
843 }
844 for (int count = 0, round = 0; round < 2; round++) {
845 if (round == 1) out->print(" methods %d", count);
846 dump_replay_data_extra_data_helper(out, round, count);
847 }
848 out->cr();
849 }
850
851 #ifndef PRODUCT
852 void ciMethodData::print() {
853 print_data_on(tty);
854 }
855
856 void ciMethodData::print_data_on(outputStream* st) {
857 ResourceMark rm;
858 ciParametersTypeData* parameters = parameters_type_data();
859 if (parameters != nullptr) {
860 parameters->print_data_on(st);
861 }
862 ciProfileData* data;
863 for (data = first_data(); is_valid(data); data = next_data(data)) {
864 st->print("%d", dp_to_di(data->dp()));
865 st->fill_to(6);
866 data->print_data_on(st);
867 }
868 st->print_cr("--- Extra data:");
869 DataLayout* dp = extra_data_base();
870 DataLayout* end = args_data_limit();
871 for (;; dp = MethodData::next_extra(dp)) {
872 assert(dp < end, "moved past end of extra data");
873 switch (dp->tag()) {
874 case DataLayout::no_tag:
875 continue;
876 case DataLayout::bit_data_tag:
877 data = new BitData(dp);
878 break;
879 case DataLayout::arg_info_data_tag:
880 data = new ciArgInfoData(dp);
881 dp = end; // ArgInfoData is after the trap data right before the parameter data.
882 break;
883 case DataLayout::speculative_trap_data_tag:
884 data = new ciSpeculativeTrapData(dp);
885 break;
886 default:
887 fatal("unexpected tag %d", dp->tag());
888 }
889 st->print("%d", dp_to_di(data->dp()));
890 st->fill_to(6);
891 data->print_data_on(st);
892 if (dp >= end) return;
893 }
894 }
895
896 void ciTypeEntries::print_ciklass(outputStream* st, intptr_t k) {
897 if (TypeEntries::is_type_none(k)) {
898 st->print("none");
899 } else if (TypeEntries::is_type_unknown(k)) {
900 st->print("unknown");
901 } else {
902 valid_ciklass(k)->print_name_on(st);
903 }
904 if (TypeEntries::was_null_seen(k)) {
905 st->print(" (null seen)");
906 }
907 }
908
909 void ciTypeStackSlotEntries::print_data_on(outputStream* st) const {
910 for (int i = 0; i < number_of_entries(); i++) {
911 _pd->tab(st);
912 st->print("%d: stack (%u) ", i, stack_slot(i));
913 print_ciklass(st, type(i));
914 st->cr();
915 }
916 }
917
918 void ciSingleTypeEntry::print_data_on(outputStream* st) const {
919 _pd->tab(st);
920 st->print("ret ");
921 print_ciklass(st, type());
922 st->cr();
923 }
924
925 void ciCallTypeData::print_data_on(outputStream* st, const char* extra) const {
926 print_shared(st, "ciCallTypeData", extra);
927 if (has_arguments()) {
928 tab(st, true);
929 st->print_cr("argument types");
930 args()->print_data_on(st);
931 }
932 if (has_return()) {
933 tab(st, true);
934 st->print_cr("return type");
935 ret()->print_data_on(st);
936 }
937 }
938
939 void ciReceiverTypeData::print_receiver_data_on(outputStream* st) const {
940 uint row;
941 int entries = 0;
942 for (row = 0; row < row_limit(); row++) {
943 if (receiver(row) != nullptr) entries++;
944 }
945 st->print_cr("count(%u) entries(%u)", count(), entries);
946 for (row = 0; row < row_limit(); row++) {
947 if (receiver(row) != nullptr) {
948 tab(st);
949 receiver(row)->print_name_on(st);
950 st->print_cr("(%u)", receiver_count(row));
951 }
952 }
953 }
954
955 void ciReceiverTypeData::print_data_on(outputStream* st, const char* extra) const {
956 print_shared(st, "ciReceiverTypeData", extra);
957 print_receiver_data_on(st);
958 }
959
960 void ciVirtualCallData::print_data_on(outputStream* st, const char* extra) const {
961 print_shared(st, "ciVirtualCallData", extra);
962 rtd_super()->print_receiver_data_on(st);
963 }
964
965 void ciVirtualCallTypeData::print_data_on(outputStream* st, const char* extra) const {
966 print_shared(st, "ciVirtualCallTypeData", extra);
967 rtd_super()->print_receiver_data_on(st);
968 if (has_arguments()) {
969 tab(st, true);
970 st->print("argument types");
971 args()->print_data_on(st);
972 }
973 if (has_return()) {
974 tab(st, true);
975 st->print("return type");
976 ret()->print_data_on(st);
977 }
978 }
979
980 void ciParametersTypeData::print_data_on(outputStream* st, const char* extra) const {
981 st->print_cr("ciParametersTypeData");
982 parameters()->print_data_on(st);
983 }
984
985 void ciSpeculativeTrapData::print_data_on(outputStream* st, const char* extra) const {
986 st->print_cr("ciSpeculativeTrapData");
987 tab(st);
988 method()->print_short_name(st);
989 st->cr();
990 }
991
992 void ciArrayStoreData::print_data_on(outputStream* st, const char* extra) const {
993 print_shared(st, "ciArrayStoreData", extra);
994 tab(st, true);
995 st->print("array");
996 array()->print_data_on(st);
997 tab(st, true);
998 st->print("element");
999 rtd_super()->print_receiver_data_on(st);
1000 }
1001
1002 void ciArrayLoadData::print_data_on(outputStream* st, const char* extra) const {
1003 print_shared(st, "ciArrayLoadData", extra);
1004 tab(st, true);
1005 st->print("array");
1006 array()->print_data_on(st);
1007 tab(st, true);
1008 st->print("element");
1009 element()->print_data_on(st);
1010 }
1011
1012 void ciACmpData::print_data_on(outputStream* st, const char* extra) const {
1013 BranchData::print_data_on(st, extra);
1014 st->cr();
1015 tab(st, true);
1016 st->print("left");
1017 left()->print_data_on(st);
1018 tab(st, true);
1019 st->print("right");
1020 right()->print_data_on(st);
1021 }
1022 #endif