1 /*
2 * Copyright (c) 2001, 2025, 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 "ci/ciMetadata.hpp"
26 #include "ci/ciMethodData.hpp"
27 #include "ci/ciReplay.hpp"
28 #include "ci/ciUtilities.inline.hpp"
29 #include "compiler/compiler_globals.hpp"
30 #include "memory/allocation.inline.hpp"
31 #include "memory/resourceArea.hpp"
32 #include "oops/klass.inline.hpp"
33 #include "oops/methodData.inline.hpp"
34 #include "runtime/deoptimization.hpp"
35 #include "utilities/copy.hpp"
36
37 // ciMethodData
38
39 // ------------------------------------------------------------------
40 // ciMethodData::ciMethodData
41 //
42 ciMethodData::ciMethodData(MethodData* md)
43 : ciMetadata(md),
44 _data_size(0), _extra_data_size(0), _data(nullptr),
45 _parameters_data_offset(0),
46 _exception_handlers_data_offset(0),
47 // Set an initial hint. Don't use set_hint_di() because
48 // first_di() may be out of bounds if data_size is 0.
49 _hint_di(first_di()),
50 _state(empty_state),
51 _saw_free_extra_data(false),
52 // Initialize the escape information (to "don't know.");
53 _eflags(0), _arg_local(0), _arg_stack(0), _arg_returned(0),
54 _invocation_counter(0),
55 _orig() {}
56
57 // Check for entries that reference an unloaded method
58 class PrepareExtraDataClosure : public CleanExtraDataClosure {
59 MethodData* _mdo;
60 SafepointStateTracker _safepoint_tracker;
61 GrowableArray<Method*> _uncached_methods;
62
63 public:
64 PrepareExtraDataClosure(MethodData* mdo)
65 : _mdo(mdo),
66 _safepoint_tracker(SafepointSynchronize::safepoint_state_tracker()),
67 _uncached_methods()
68 { }
69
70 bool is_live(Method* m) {
71 if (!m->method_holder()->is_loader_alive()) {
72 return false;
73 }
74 if (CURRENT_ENV->cached_metadata(m) == nullptr) {
75 // Uncached entries need to be pre-populated.
76 _uncached_methods.append(m);
77 }
78 return true;
79 }
80
81 bool has_safepointed() {
82 return _safepoint_tracker.safepoint_state_changed();
83 }
84
85 bool finish() {
86 if (_uncached_methods.length() == 0) {
87 // Preparation finished iff all Methods* were already cached.
88 return true;
89 }
90 // We are currently holding the extra_data_lock and ensuring
91 // no safepoint breaks the lock.
92 _mdo->check_extra_data_locked();
93
94 // We now want to cache some method data. This could cause a safepoint.
95 // We temporarily release the lock and allow safepoints, and revert that
96 // at the end of the scope. This is safe, since we currently do not hold
97 // any extra_method_data: finish is called only after clean_extra_data,
98 // and the outer scope that first aquired the lock should not hold any
99 // extra_method_data while cleaning is performed, as the offsets can change.
100 MutexUnlocker mu(_mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
101
102 for (int i = 0; i < _uncached_methods.length(); ++i) {
103 if (has_safepointed()) {
104 // The metadata in the growable array might contain stale
105 // entries after a safepoint.
106 return false;
107 }
108 Method* method = _uncached_methods.at(i);
109 // Populating ciEnv caches may cause safepoints due
110 // to taking the Compile_lock with safepoint checks.
111 (void)CURRENT_ENV->get_method(method);
112 }
113 return false;
114 }
115 };
116
117 void ciMethodData::prepare_metadata() {
118 MethodData* mdo = get_MethodData();
119
120 for (;;) {
121 ResourceMark rm;
122 PrepareExtraDataClosure cl(mdo);
123 mdo->clean_extra_data(&cl);
124 if (cl.finish()) {
125 // When encountering uncached metadata, the Compile_lock might be
126 // acquired when creating ciMetadata handles, causing safepoints
127 // which requires a new round of preparation to clean out potentially
128 // new unloading metadata.
129 return;
130 }
131 }
132 }
133
134 void ciMethodData::load_remaining_extra_data() {
135 MethodData* mdo = get_MethodData();
136
137 // Lock to read ProfileData, and ensure lock is not unintentionally broken by a safepoint
138 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
139
140 // Deferred metadata cleaning due to concurrent class unloading.
141 prepare_metadata();
142 // After metadata preparation, there is no stale metadata,
143 // and no safepoints can introduce more stale metadata.
144 NoSafepointVerifier no_safepoint;
145
146 assert((mdo->data_size() == _data_size) && (mdo->extra_data_size() == _extra_data_size), "sanity, unchanged");
147 assert(extra_data_base() == (DataLayout*)((address) _data + _data_size), "sanity");
148
149 // Copy the extra data once it is prepared (i.e. cache populated, no release of extra data lock anymore)
150 Copy::disjoint_words_atomic((HeapWord*) mdo->extra_data_base(),
151 (HeapWord*) extra_data_base(),
152 // copy everything from extra_data_base() up to parameters_data_base()
153 pointer_delta(parameters_data_base(), extra_data_base(), HeapWordSize));
154
155 // skip parameter data copying. Already done in 'load_data'
156
157 // copy exception handler data
158 Copy::disjoint_words_atomic((HeapWord*) mdo->exception_handler_data_base(),
159 (HeapWord*) exception_handler_data_base(),
160 exception_handler_data_size() / HeapWordSize);
161
162 // speculative trap entries also hold a pointer to a Method so need to be translated
163 DataLayout* dp_src = mdo->extra_data_base();
164 DataLayout* end_src = mdo->args_data_limit();
165 DataLayout* dp_dst = extra_data_base();
166 for (;; dp_src = MethodData::next_extra(dp_src), dp_dst = MethodData::next_extra(dp_dst)) {
167 assert(dp_src < end_src, "moved past end of extra data");
168 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");
169
170 int tag = dp_src->tag();
171 switch(tag) {
172 case DataLayout::speculative_trap_data_tag: {
173 ciSpeculativeTrapData data_dst(dp_dst);
174 SpeculativeTrapData data_src(dp_src);
175 data_dst.translate_from(&data_src);
176 break;
177 }
178 case DataLayout::bit_data_tag:
179 break;
180 case DataLayout::no_tag:
181 case DataLayout::arg_info_data_tag:
182 // An empty slot or ArgInfoData entry marks the end of the trap data
183 {
184 return; // Need a block to avoid SS compiler bug
185 }
186 default:
187 fatal("bad tag = %d", tag);
188 }
189 }
190 }
191
192 bool ciMethodData::load_data() {
193 MethodData* mdo = get_MethodData();
194 if (mdo == nullptr) {
195 return false;
196 }
197
198 // To do: don't copy the data if it is not "ripe" -- require a minimum #
199 // of invocations.
200
201 // Snapshot the data and extra parameter data first without the extra trap and arg info data.
202 // Those are copied in a second step. Actually, an approximate snapshot of the data is taken.
203 // Any concurrently executing threads may be changing the data as we copy it.
204 //
205 // The first snapshot step requires two copies (data entries and parameter data entries) since
206 // the MDO is laid out as follows:
207 //
208 // data_base: ---------------------------
209 // | data entries |
210 // | ... |
211 // extra_data_base: ---------------------------
212 // | trap data entries |
213 // | ... |
214 // | one arg info data entry |
215 // | data for each arg |
216 // | ... |
217 // args_data_limit: ---------------------------
218 // | parameter data entries |
219 // | ... |
220 // param_data_limit: ---------------------------
221 // | ex handler data entries |
222 // | ... |
223 // extra_data_limit: ---------------------------
224 //
225 // _data_size = extra_data_base - data_base
226 // _extra_data_size = extra_data_limit - extra_data_base
227 // total_size = _data_size + _extra_data_size
228 // args_data_limit = param_data_base
229 // param_data_limit = exception_handler_data_base
230 // extra_data_limit = extra_data_limit
231
232 #ifndef ZERO
233 // Some Zero platforms do not have expected alignment, and do not use
234 // this code. static_assert would still fire and fail for them.
235 static_assert(sizeof(_orig) % HeapWordSize == 0, "align");
236 #endif
237 Copy::disjoint_words_atomic((HeapWord*) &mdo->_compiler_counters,
238 (HeapWord*) &_orig,
239 sizeof(_orig) / HeapWordSize);
240 Arena* arena = CURRENT_ENV->arena();
241 _data_size = mdo->data_size();
242 _extra_data_size = mdo->extra_data_size();
243 int total_size = _data_size + _extra_data_size;
244 _data = (intptr_t *) arena->Amalloc(total_size);
245 Copy::disjoint_words_atomic((HeapWord*) mdo->data_base(),
246 (HeapWord*) _data,
247 _data_size / HeapWordSize);
248 // Copy offsets. This is used below
249 _parameters_data_offset = mdo->parameters_type_data_di();
250 _exception_handlers_data_offset = mdo->exception_handlers_data_di();
251
252 int parameters_data_size = mdo->parameters_size_in_bytes();
253 if (parameters_data_size > 0) {
254 // Snapshot the parameter data
255 Copy::disjoint_words_atomic((HeapWord*) mdo->parameters_data_base(),
256 (HeapWord*) parameters_data_base(),
257 parameters_data_size / HeapWordSize);
258 }
259 // Traverse the profile data, translating any oops into their
260 // ci equivalents.
261 ResourceMark rm;
262 ciProfileData* ci_data = first_data();
263 ProfileData* data = mdo->first_data();
264 while (is_valid(ci_data)) {
265 ci_data->translate_from(data);
266 ci_data = next_data(ci_data);
267 data = mdo->next_data(data);
268 }
269 if (mdo->parameters_type_data() != nullptr) {
270 DataLayout* parameters_data = data_layout_at(_parameters_data_offset);
271 ciParametersTypeData* parameters = new ciParametersTypeData(parameters_data);
272 parameters->translate_from(mdo->parameters_type_data());
273 }
274
275 assert((DataLayout*) ((address)_data + total_size - parameters_data_size - exception_handler_data_size()) == args_data_limit(),
276 "sanity - parameter data starts after the argument data of the single ArgInfoData entry");
277 load_remaining_extra_data();
278
279 // Note: Extra data are all BitData, and do not need translation.
280 _invocation_counter = mdo->invocation_count();
281 if (_invocation_counter == 0 && mdo->backedge_count() > 0) {
282 // Avoid skewing counter data during OSR compilation.
283 // Sometimes, MDO is allocated during the very first invocation and OSR compilation is triggered
284 // solely by backedge counter while invocation counter stays zero. In such case, it's important
285 // to observe non-zero invocation count to properly scale profile counts (see ciMethod::scale_count()).
286 _invocation_counter = 1;
287 }
288
289 _state = mdo->is_mature() ? mature_state : immature_state;
290 _eflags = mdo->eflags();
291 _arg_local = mdo->arg_local();
292 _arg_stack = mdo->arg_stack();
293 _arg_returned = mdo->arg_returned();
294 if (ReplayCompiles) {
295 ciReplay::initialize(this);
296 if (is_empty()) {
297 return false;
298 }
299 }
300 return true;
301 }
302
303 void ciReceiverTypeData::translate_receiver_data_from(const ProfileData* data) {
304 for (uint row = 0; row < row_limit(); row++) {
305 Klass* k = data->as_ReceiverTypeData()->receiver(row);
306 if (k != nullptr) {
307 if (k->is_loader_alive()) {
308 ciKlass* klass = CURRENT_ENV->get_klass(k);
309 set_receiver(row, klass);
310 } else {
311 // With concurrent class unloading, the MDO could have stale metadata; override it
312 clear_row(row);
313 }
314 } else {
315 set_receiver(row, nullptr);
316 }
317 }
318 }
319
320 void ciTypeStackSlotEntries::translate_type_data_from(const TypeStackSlotEntries* entries) {
321 for (int i = 0; i < number_of_entries(); i++) {
322 intptr_t k = entries->type(i);
323 Klass* klass = (Klass*)klass_part(k);
324 if (klass != nullptr && !klass->is_loader_alive()) {
325 // With concurrent class unloading, the MDO could have stale metadata; override it
326 TypeStackSlotEntries::set_type(i, TypeStackSlotEntries::with_status((Klass*)nullptr, k));
327 } else {
328 TypeStackSlotEntries::set_type(i, translate_klass(k));
329 }
330 }
331 }
332
333 void ciReturnTypeEntry::translate_type_data_from(const ReturnTypeEntry* ret) {
334 intptr_t k = ret->type();
335 Klass* klass = (Klass*)klass_part(k);
336 if (klass != nullptr && !klass->is_loader_alive()) {
337 // With concurrent class unloading, the MDO could have stale metadata; override it
338 set_type(ReturnTypeEntry::with_status((Klass*)nullptr, k));
339 } else {
340 set_type(translate_klass(k));
341 }
342 }
343
344 void ciSpeculativeTrapData::translate_from(const ProfileData* data) {
345 Method* m = data->as_SpeculativeTrapData()->method();
346 ciMethod* ci_m = CURRENT_ENV->get_method(m);
347 set_method(ci_m);
348 }
349
350 // Get the data at an arbitrary (sort of) data index.
351 ciProfileData* ciMethodData::data_at(int data_index) {
352 if (out_of_bounds(data_index)) {
353 return nullptr;
354 }
355 DataLayout* data_layout = data_layout_at(data_index);
356 return data_from(data_layout);
357 }
358
359 ciProfileData* ciMethodData::data_from(DataLayout* data_layout) {
360 switch (data_layout->tag()) {
361 case DataLayout::no_tag:
362 default:
363 ShouldNotReachHere();
364 return nullptr;
365 case DataLayout::bit_data_tag:
366 return new ciBitData(data_layout);
367 case DataLayout::counter_data_tag:
368 return new ciCounterData(data_layout);
369 case DataLayout::jump_data_tag:
370 return new ciJumpData(data_layout);
371 case DataLayout::receiver_type_data_tag:
372 return new ciReceiverTypeData(data_layout);
373 case DataLayout::virtual_call_data_tag:
374 return new ciVirtualCallData(data_layout);
375 case DataLayout::ret_data_tag:
376 return new ciRetData(data_layout);
377 case DataLayout::branch_data_tag:
378 return new ciBranchData(data_layout);
379 case DataLayout::multi_branch_data_tag:
380 return new ciMultiBranchData(data_layout);
381 case DataLayout::arg_info_data_tag:
382 return new ciArgInfoData(data_layout);
383 case DataLayout::call_type_data_tag:
384 return new ciCallTypeData(data_layout);
385 case DataLayout::virtual_call_type_data_tag:
386 return new ciVirtualCallTypeData(data_layout);
387 case DataLayout::parameters_type_data_tag:
388 return new ciParametersTypeData(data_layout);
389 };
390 }
391
392 // Iteration over data.
393 ciProfileData* ciMethodData::next_data(ciProfileData* current) {
394 int current_index = dp_to_di(current->dp());
395 int next_index = current_index + current->size_in_bytes();
396 ciProfileData* next = data_at(next_index);
397 return next;
398 }
399
400 DataLayout* ciMethodData::next_data_layout_helper(DataLayout* current, bool extra) {
401 int current_index = dp_to_di((address)current);
402 int next_index = current_index + current->size_in_bytes();
403 if (extra ? out_of_bounds_extra(next_index) : out_of_bounds(next_index)) {
404 return nullptr;
405 }
406 DataLayout* next = data_layout_at(next_index);
407 return next;
408 }
409
410 DataLayout* ciMethodData::next_data_layout(DataLayout* current) {
411 return next_data_layout_helper(current, false);
412 }
413
414 DataLayout* ciMethodData::next_extra_data_layout(DataLayout* current) {
415 return next_data_layout_helper(current, true);
416 }
417
418 ciProfileData* ciMethodData::bci_to_extra_data(int bci, ciMethod* m, bool& two_free_slots) {
419 DataLayout* dp = extra_data_base();
420 DataLayout* end = args_data_limit();
421 two_free_slots = false;
422 for (;dp < end; dp = MethodData::next_extra(dp)) {
423 switch(dp->tag()) {
424 case DataLayout::no_tag:
425 _saw_free_extra_data = true; // observed an empty slot (common case)
426 two_free_slots = (MethodData::next_extra(dp)->tag() == DataLayout::no_tag);
427 return nullptr;
428 case DataLayout::arg_info_data_tag:
429 return nullptr; // ArgInfoData is after the trap data right before the parameter data.
430 case DataLayout::bit_data_tag:
431 if (m == nullptr && dp->bci() == bci) {
432 return new ciBitData(dp);
433 }
434 break;
435 case DataLayout::speculative_trap_data_tag: {
436 ciSpeculativeTrapData* data = new ciSpeculativeTrapData(dp);
437 // data->method() might be null if the MDO is snapshotted
438 // concurrently with a trap
439 if (m != nullptr && data->method() == m && dp->bci() == bci) {
440 return data;
441 }
442 break;
443 }
444 default:
445 fatal("bad tag = %d", dp->tag());
446 }
447 }
448 return nullptr;
449 }
450
451 // Translate a bci to its corresponding data, or nullptr.
452 ciProfileData* ciMethodData::bci_to_data(int bci, ciMethod* m) {
453 // If m is not nullptr we look for a SpeculativeTrapData entry
454 if (m == nullptr) {
455 DataLayout* data_layout = data_layout_before(bci);
456 for ( ; is_valid(data_layout); data_layout = next_data_layout(data_layout)) {
457 if (data_layout->bci() == bci) {
458 set_hint_di(dp_to_di((address)data_layout));
459 return data_from(data_layout);
460 } else if (data_layout->bci() > bci) {
461 break;
462 }
463 }
464 }
465 bool two_free_slots = false;
466 ciProfileData* result = bci_to_extra_data(bci, m, two_free_slots);
467 if (result != nullptr) {
468 return result;
469 }
470 if (m != nullptr && !two_free_slots) {
471 // We were looking for a SpeculativeTrapData entry we didn't
472 // find. Room is not available for more SpeculativeTrapData
473 // entries, look in the non SpeculativeTrapData entries.
474 return bci_to_data(bci, nullptr);
475 }
476 return nullptr;
477 }
478
479 ciBitData ciMethodData::exception_handler_bci_to_data(int bci) {
480 assert(ProfileExceptionHandlers, "not profiling");
481 assert(_data != nullptr, "must be initialized");
482 for (DataLayout* data = exception_handler_data_base(); data < exception_handler_data_limit(); data = next_extra_data_layout(data)) {
483 assert(data != nullptr, "out of bounds?");
484 if (data->bci() == bci) {
485 return ciBitData(data);
486 }
487 }
488 // called with invalid bci or wrong Method/MethodData
489 ShouldNotReachHere();
490 return ciBitData(nullptr);
491 }
492
493 // Conservatively decode the trap_state of a ciProfileData.
494 int ciMethodData::has_trap_at(ciProfileData* data, int reason) {
495 typedef Deoptimization::DeoptReason DR_t;
496 int per_bc_reason
497 = Deoptimization::reason_recorded_per_bytecode_if_any((DR_t) reason);
498 if (trap_count(reason) == 0) {
499 // Impossible for this trap to have occurred, regardless of trap_state.
500 // Note: This happens if the MDO is empty.
501 return 0;
502 } else if (per_bc_reason == Deoptimization::Reason_none) {
503 // We cannot conclude anything; a trap happened somewhere, maybe here.
504 return -1;
505 } else if (data == nullptr) {
506 // No profile here, not even an extra_data record allocated on the fly.
507 // If there are empty extra_data records, and there had been a trap,
508 // there would have been a non-null data pointer. If there are no
509 // free extra_data records, we must return a conservative -1.
510 if (_saw_free_extra_data)
511 return 0; // Q.E.D.
512 else
513 return -1; // bail with a conservative answer
514 } else {
515 return Deoptimization::trap_state_has_reason(data->trap_state(), per_bc_reason);
516 }
517 }
518
519 int ciMethodData::trap_recompiled_at(ciProfileData* data) {
520 if (data == nullptr) {
521 return (_saw_free_extra_data? 0: -1); // (see previous method)
522 } else {
523 return Deoptimization::trap_state_is_recompiled(data->trap_state())? 1: 0;
524 }
525 }
526
527 void ciMethodData::clear_escape_info() {
528 VM_ENTRY_MARK;
529 MethodData* mdo = get_MethodData();
530 if (mdo != nullptr) {
531 mdo->clear_escape_info();
532 ArgInfoData *aid = arg_info();
533 int arg_count = (aid == nullptr) ? 0 : aid->number_of_args();
534 for (int i = 0; i < arg_count; i++) {
535 set_arg_modified(i, 0);
536 }
537 }
538 _eflags = _arg_local = _arg_stack = _arg_returned = 0;
539 }
540
541 // copy our escape info to the MethodData* if it exists
542 void ciMethodData::update_escape_info() {
543 VM_ENTRY_MARK;
544 MethodData* mdo = get_MethodData();
545 if ( mdo != nullptr) {
546 mdo->set_eflags(_eflags);
547 mdo->set_arg_local(_arg_local);
548 mdo->set_arg_stack(_arg_stack);
549 mdo->set_arg_returned(_arg_returned);
550 int arg_count = mdo->method()->size_of_parameters();
551 for (int i = 0; i < arg_count; i++) {
552 mdo->set_arg_modified(i, arg_modified(i));
553 }
554 }
555 }
556
557 void ciMethodData::set_compilation_stats(short loops, short blocks) {
558 VM_ENTRY_MARK;
559 MethodData* mdo = get_MethodData();
560 if (mdo != nullptr) {
561 mdo->set_num_loops(loops);
562 mdo->set_num_blocks(blocks);
563 }
564 }
565
566 void ciMethodData::set_would_profile(bool p) {
567 VM_ENTRY_MARK;
568 MethodData* mdo = get_MethodData();
569 if (mdo != nullptr) {
570 mdo->set_would_profile(p);
571 }
572 }
573
574 void ciMethodData::set_argument_type(int bci, int i, ciKlass* k) {
575 VM_ENTRY_MARK;
576 MethodData* mdo = get_MethodData();
577 if (mdo != nullptr) {
578 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
579 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
580
581 ProfileData* data = mdo->bci_to_data(bci);
582 if (data != nullptr) {
583 if (data->is_CallTypeData()) {
584 data->as_CallTypeData()->set_argument_type(i, k->get_Klass());
585 } else {
586 assert(data->is_VirtualCallTypeData(), "no arguments!");
587 data->as_VirtualCallTypeData()->set_argument_type(i, k->get_Klass());
588 }
589 }
590 }
591 }
592
593 void ciMethodData::set_parameter_type(int i, ciKlass* k) {
594 VM_ENTRY_MARK;
595 MethodData* mdo = get_MethodData();
596 if (mdo != nullptr) {
597 mdo->parameters_type_data()->set_type(i, k->get_Klass());
598 }
599 }
600
601 void ciMethodData::set_return_type(int bci, ciKlass* k) {
602 VM_ENTRY_MARK;
603 MethodData* mdo = get_MethodData();
604 if (mdo != nullptr) {
605 // Lock to read ProfileData, and ensure lock is not broken by a safepoint
606 MutexLocker ml(mdo->extra_data_lock(), Mutex::_no_safepoint_check_flag);
607
608 ProfileData* data = mdo->bci_to_data(bci);
609 if (data != nullptr) {
610 if (data->is_CallTypeData()) {
611 data->as_CallTypeData()->set_return_type(k->get_Klass());
612 } else {
613 assert(data->is_VirtualCallTypeData(), "no arguments!");
614 data->as_VirtualCallTypeData()->set_return_type(k->get_Klass());
615 }
616 }
617 }
618 }
619
620 bool ciMethodData::has_escape_info() {
621 return eflag_set(MethodData::estimated);
622 }
623
624 void ciMethodData::set_eflag(MethodData::EscapeFlag f) {
625 set_bits(_eflags, f);
626 }
627
628 bool ciMethodData::eflag_set(MethodData::EscapeFlag f) const {
629 return mask_bits(_eflags, f) != 0;
630 }
631
632 void ciMethodData::set_arg_local(int i) {
633 set_nth_bit(_arg_local, i);
634 }
635
636 void ciMethodData::set_arg_stack(int i) {
637 set_nth_bit(_arg_stack, i);
638 }
639
640 void ciMethodData::set_arg_returned(int i) {
641 set_nth_bit(_arg_returned, i);
642 }
643
644 void ciMethodData::set_arg_modified(int arg, uint val) {
645 ArgInfoData *aid = arg_info();
646 if (aid == nullptr)
647 return;
648 assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number");
649 aid->set_arg_modified(arg, val);
650 }
651
652 bool ciMethodData::is_arg_local(int i) const {
653 return is_set_nth_bit(_arg_local, i);
654 }
655
656 bool ciMethodData::is_arg_stack(int i) const {
657 return is_set_nth_bit(_arg_stack, i);
658 }
659
660 bool ciMethodData::is_arg_returned(int i) const {
661 return is_set_nth_bit(_arg_returned, i);
662 }
663
664 uint ciMethodData::arg_modified(int arg) const {
665 ArgInfoData *aid = arg_info();
666 if (aid == nullptr)
667 return 0;
668 assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number");
669 return aid->arg_modified(arg);
670 }
671
672 ciParametersTypeData* ciMethodData::parameters_type_data() const {
673 return parameter_data_size() != 0 ? new ciParametersTypeData(data_layout_at(_parameters_data_offset)) : nullptr;
674 }
675
676 ByteSize ciMethodData::offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data) {
677 // Get offset within MethodData* of the data array
678 ByteSize data_offset = MethodData::data_offset();
679
680 // Get cell offset of the ProfileData within data array
681 int cell_offset = dp_to_di(data->dp());
682
683 // Add in counter_offset, the # of bytes into the ProfileData of counter or flag
684 int offset = in_bytes(data_offset) + cell_offset + in_bytes(slot_offset_in_data);
685
686 return in_ByteSize(offset);
687 }
688
689 ciArgInfoData *ciMethodData::arg_info() const {
690 // Should be last, have to skip all traps.
691 DataLayout* dp = extra_data_base();
692 DataLayout* end = args_data_limit();
693 for (; dp < end; dp = MethodData::next_extra(dp)) {
694 if (dp->tag() == DataLayout::arg_info_data_tag)
695 return new ciArgInfoData(dp);
696 }
697 return nullptr;
698 }
699
700
701 // Implementation of the print method.
702 void ciMethodData::print_impl(outputStream* st) {
703 ciMetadata::print_impl(st);
704 }
705
706 void ciMethodData::dump_replay_data_type_helper(outputStream* out, int round, int& count, ProfileData* pdata, ByteSize offset, ciKlass* k) {
707 if (k != nullptr) {
708 if (round == 0) {
709 count++;
710 } else {
711 out->print(" %d %s", (int)(dp_to_di(pdata->dp() + in_bytes(offset)) / sizeof(intptr_t)),
712 CURRENT_ENV->replay_name(k));
713 }
714 }
715 }
716
717 template<class T> void ciMethodData::dump_replay_data_receiver_type_helper(outputStream* out, int round, int& count, T* vdata) {
718 for (uint i = 0; i < vdata->row_limit(); i++) {
719 dump_replay_data_type_helper(out, round, count, vdata, vdata->receiver_offset(i), vdata->receiver(i));
720 }
721 }
722
723 template<class T> void ciMethodData::dump_replay_data_call_type_helper(outputStream* out, int round, int& count, T* call_type_data) {
724 if (call_type_data->has_arguments()) {
725 for (int i = 0; i < call_type_data->number_of_arguments(); i++) {
726 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));
727 }
728 }
729 if (call_type_data->has_return()) {
730 dump_replay_data_type_helper(out, round, count, call_type_data, call_type_data->return_type_offset(), call_type_data->valid_return_type());
731 }
732 }
733
734 void ciMethodData::dump_replay_data_extra_data_helper(outputStream* out, int round, int& count) {
735 DataLayout* dp = extra_data_base();
736 DataLayout* end = args_data_limit();
737
738 for (;dp < end; dp = MethodData::next_extra(dp)) {
739 switch(dp->tag()) {
740 case DataLayout::no_tag:
741 case DataLayout::arg_info_data_tag:
742 return;
743 case DataLayout::bit_data_tag:
744 break;
745 case DataLayout::speculative_trap_data_tag: {
746 ciSpeculativeTrapData* data = new ciSpeculativeTrapData(dp);
747 ciMethod* m = data->method();
748 if (m != nullptr) {
749 if (round == 0) {
750 count++;
751 } else {
752 out->print(" %d ", (int)(dp_to_di(((address)dp) + in_bytes(ciSpeculativeTrapData::method_offset())) / sizeof(intptr_t)));
753 m->dump_name_as_ascii(out);
754 }
755 }
756 break;
757 }
758 default:
759 fatal("bad tag = %d", dp->tag());
760 }
761 }
762 }
763
764 void ciMethodData::dump_replay_data(outputStream* out) {
765 ResourceMark rm;
766 MethodData* mdo = get_MethodData();
767 Method* method = mdo->method();
768 out->print("ciMethodData ");
769 ciMethod::dump_name_as_ascii(out, method);
770 out->print(" %d %d", _state, _invocation_counter);
771
772 // dump the contents of the MDO header as raw data
773 unsigned char* orig = (unsigned char*)&_orig;
774 int length = sizeof(_orig);
775 out->print(" orig %d", length);
776 for (int i = 0; i < length; i++) {
777 out->print(" %d", orig[i]);
778 }
779
780 // dump the MDO data as raw data
781 int elements = (data_size() + extra_data_size()) / sizeof(intptr_t);
782 out->print(" data %d", elements);
783 for (int i = 0; i < elements; i++) {
784 // We could use INTPTR_FORMAT here but that's zero justified
785 // which makes comparing it with the SA version of this output
786 // harder. data()'s element type is intptr_t.
787 out->print(" 0x%zx", data()[i]);
788 }
789
790 // The MDO contained oop references as ciObjects, so scan for those
791 // and emit pairs of offset and klass name so that they can be
792 // reconstructed at runtime. The first round counts the number of
793 // oop references and the second actually emits them.
794 ciParametersTypeData* parameters = parameters_type_data();
795 for (int count = 0, round = 0; round < 2; round++) {
796 if (round == 1) out->print(" oops %d", count);
797 ProfileData* pdata = first_data();
798 for ( ; is_valid(pdata); pdata = next_data(pdata)) {
799 if (pdata->is_VirtualCallData()) {
800 ciVirtualCallData* vdata = (ciVirtualCallData*)pdata;
801 dump_replay_data_receiver_type_helper<ciVirtualCallData>(out, round, count, vdata);
802 if (pdata->is_VirtualCallTypeData()) {
803 ciVirtualCallTypeData* call_type_data = (ciVirtualCallTypeData*)pdata;
804 dump_replay_data_call_type_helper<ciVirtualCallTypeData>(out, round, count, call_type_data);
805 }
806 } else if (pdata->is_ReceiverTypeData()) {
807 ciReceiverTypeData* vdata = (ciReceiverTypeData*)pdata;
808 dump_replay_data_receiver_type_helper<ciReceiverTypeData>(out, round, count, vdata);
809 } else if (pdata->is_CallTypeData()) {
810 ciCallTypeData* call_type_data = (ciCallTypeData*)pdata;
811 dump_replay_data_call_type_helper<ciCallTypeData>(out, round, count, call_type_data);
812 }
813 }
814 if (parameters != nullptr) {
815 for (int i = 0; i < parameters->number_of_parameters(); i++) {
816 dump_replay_data_type_helper(out, round, count, parameters, ParametersTypeData::type_offset(i), parameters->valid_parameter_type(i));
817 }
818 }
819 }
820 for (int count = 0, round = 0; round < 2; round++) {
821 if (round == 1) out->print(" methods %d", count);
822 dump_replay_data_extra_data_helper(out, round, count);
823 }
824 out->cr();
825 }
826
827 #ifndef PRODUCT
828 void ciMethodData::print() {
829 print_data_on(tty);
830 }
831
832 void ciMethodData::print_data_on(outputStream* st) {
833 ResourceMark rm;
834 ciParametersTypeData* parameters = parameters_type_data();
835 if (parameters != nullptr) {
836 parameters->print_data_on(st);
837 }
838 ciProfileData* data;
839 for (data = first_data(); is_valid(data); data = next_data(data)) {
840 st->print("%d", dp_to_di(data->dp()));
841 st->fill_to(6);
842 data->print_data_on(st);
843 }
844 st->print_cr("--- Extra data:");
845 DataLayout* dp = extra_data_base();
846 DataLayout* end = args_data_limit();
847 for (;; dp = MethodData::next_extra(dp)) {
848 assert(dp < end, "moved past end of extra data");
849 switch (dp->tag()) {
850 case DataLayout::no_tag:
851 continue;
852 case DataLayout::bit_data_tag:
853 data = new BitData(dp);
854 break;
855 case DataLayout::arg_info_data_tag:
856 data = new ciArgInfoData(dp);
857 dp = end; // ArgInfoData is after the trap data right before the parameter data.
858 break;
859 case DataLayout::speculative_trap_data_tag:
860 data = new ciSpeculativeTrapData(dp);
861 break;
862 default:
863 fatal("unexpected tag %d", dp->tag());
864 }
865 st->print("%d", dp_to_di(data->dp()));
866 st->fill_to(6);
867 data->print_data_on(st);
868 if (dp >= end) return;
869 }
870 }
871
872 void ciTypeEntries::print_ciklass(outputStream* st, intptr_t k) {
873 if (TypeEntries::is_type_none(k)) {
874 st->print("none");
875 } else if (TypeEntries::is_type_unknown(k)) {
876 st->print("unknown");
877 } else {
878 valid_ciklass(k)->print_name_on(st);
879 }
880 if (TypeEntries::was_null_seen(k)) {
881 st->print(" (null seen)");
882 }
883 }
884
885 void ciTypeStackSlotEntries::print_data_on(outputStream* st) const {
886 for (int i = 0; i < number_of_entries(); i++) {
887 _pd->tab(st);
888 st->print("%d: stack (%u) ", i, stack_slot(i));
889 print_ciklass(st, type(i));
890 st->cr();
891 }
892 }
893
894 void ciReturnTypeEntry::print_data_on(outputStream* st) const {
895 _pd->tab(st);
896 st->print("ret ");
897 print_ciklass(st, type());
898 st->cr();
899 }
900
901 void ciCallTypeData::print_data_on(outputStream* st, const char* extra) const {
902 print_shared(st, "ciCallTypeData", extra);
903 if (has_arguments()) {
904 tab(st, true);
905 st->print_cr("argument types");
906 args()->print_data_on(st);
907 }
908 if (has_return()) {
909 tab(st, true);
910 st->print_cr("return type");
911 ret()->print_data_on(st);
912 }
913 }
914
915 void ciReceiverTypeData::print_receiver_data_on(outputStream* st) const {
916 uint row;
917 int entries = 0;
918 for (row = 0; row < row_limit(); row++) {
919 if (receiver(row) != nullptr) entries++;
920 }
921 st->print_cr("count(%u) entries(%u)", count(), entries);
922 for (row = 0; row < row_limit(); row++) {
923 if (receiver(row) != nullptr) {
924 tab(st);
925 receiver(row)->print_name_on(st);
926 st->print_cr("(%u)", receiver_count(row));
927 }
928 }
929 }
930
931 void ciReceiverTypeData::print_data_on(outputStream* st, const char* extra) const {
932 print_shared(st, "ciReceiverTypeData", extra);
933 print_receiver_data_on(st);
934 }
935
936 void ciVirtualCallData::print_data_on(outputStream* st, const char* extra) const {
937 print_shared(st, "ciVirtualCallData", extra);
938 rtd_super()->print_receiver_data_on(st);
939 }
940
941 void ciVirtualCallTypeData::print_data_on(outputStream* st, const char* extra) const {
942 print_shared(st, "ciVirtualCallTypeData", extra);
943 rtd_super()->print_receiver_data_on(st);
944 if (has_arguments()) {
945 tab(st, true);
946 st->print("argument types");
947 args()->print_data_on(st);
948 }
949 if (has_return()) {
950 tab(st, true);
951 st->print("return type");
952 ret()->print_data_on(st);
953 }
954 }
955
956 void ciParametersTypeData::print_data_on(outputStream* st, const char* extra) const {
957 st->print_cr("ciParametersTypeData");
958 parameters()->print_data_on(st);
959 }
960
961 void ciSpeculativeTrapData::print_data_on(outputStream* st, const char* extra) const {
962 st->print_cr("ciSpeculativeTrapData");
963 tab(st);
964 method()->print_short_name(st);
965 st->cr();
966 }
967 #endif