1 /*
  2  * Copyright (c) 2001, 2021, 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 "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(NULL),
 45   // Set an initial hint. Don't use set_hint_di() because
 46   // first_di() may be out of bounds if data_size is 0.
 47   _hint_di(first_di()),
 48   _state(empty_state),
 49   _saw_free_extra_data(false),
 50   // Initialize the escape information (to "don't know.");
 51   _eflags(0), _arg_local(0), _arg_stack(0), _arg_returned(0),
 52   _invocation_counter(0),
 53   _orig(),
 54   _parameters(NULL) {}
 55 
 56 // Check for entries that reference an unloaded method
 57 class PrepareExtraDataClosure : public CleanExtraDataClosure {
 58   MethodData*            _mdo;
 59   SafepointStateTracker  _safepoint_tracker;
 60   GrowableArray<Method*> _uncached_methods;
 61 
 62 public:
 63   PrepareExtraDataClosure(MethodData* mdo)
 64     : _mdo(mdo),
 65       _safepoint_tracker(SafepointSynchronize::safepoint_state_tracker()),
 66       _uncached_methods()
 67   { }
 68 
 69   bool is_live(Method* m) {
 70     if (!m->method_holder()->is_loader_alive()) {
 71       return false;
 72     }
 73     if (CURRENT_ENV->cached_metadata(m) == NULL) {
 74       // Uncached entries need to be pre-populated.
 75       _uncached_methods.append(m);
 76     }
 77     return true;
 78   }
 79 
 80   bool has_safepointed() {
 81     return _safepoint_tracker.safepoint_state_changed();
 82   }
 83 
 84   bool finish() {
 85     if (_uncached_methods.length() == 0) {
 86       // Preparation finished iff all Methods* were already cached.
 87       return true;
 88     }
 89     // Holding locks through safepoints is bad practice.
 90     MutexUnlocker mu(_mdo->extra_data_lock());
 91     for (int i = 0; i < _uncached_methods.length(); ++i) {
 92       if (has_safepointed()) {
 93         // The metadata in the growable array might contain stale
 94         // entries after a safepoint.
 95         return false;
 96       }
 97       Method* method = _uncached_methods.at(i);
 98       // Populating ciEnv caches may cause safepoints due
 99       // to taking the Compile_lock with safepoint checks.
100       (void)CURRENT_ENV->get_method(method);
101     }
102     return false;
103   }
104 };
105 
106 void ciMethodData::prepare_metadata() {
107   MethodData* mdo = get_MethodData();
108 
109   for (;;) {
110     ResourceMark rm;
111     PrepareExtraDataClosure cl(mdo);
112     mdo->clean_extra_data(&cl);
113     if (cl.finish()) {
114       // When encountering uncached metadata, the Compile_lock might be
115       // acquired when creating ciMetadata handles, causing safepoints
116       // which requires a new round of preparation to clean out potentially
117       // new unloading metadata.
118       return;
119     }
120   }
121 }
122 
123 void ciMethodData::load_remaining_extra_data() {
124   MethodData* mdo = get_MethodData();
125   MutexLocker ml(mdo->extra_data_lock());
126   // Deferred metadata cleaning due to concurrent class unloading.
127   prepare_metadata();
128   // After metadata preparation, there is no stale metadata,
129   // and no safepoints can introduce more stale metadata.
130   NoSafepointVerifier no_safepoint;
131 
132   assert((mdo->data_size() == _data_size) && (mdo->extra_data_size() == _extra_data_size), "sanity, unchanged");
133   assert(extra_data_base() == (DataLayout*)((address) _data + _data_size), "sanity");
134 
135   // Copy the extra data once it is prepared (i.e. cache populated, no release of extra data lock anymore)
136   Copy::disjoint_words_atomic((HeapWord*) mdo->extra_data_base(),
137                               (HeapWord*)((address) _data + _data_size),
138                               (_extra_data_size - mdo->parameters_size_in_bytes()) / HeapWordSize);
139 
140   // speculative trap entries also hold a pointer to a Method so need to be translated
141   DataLayout* dp_src  = mdo->extra_data_base();
142   DataLayout* end_src = mdo->args_data_limit();
143   DataLayout* dp_dst  = extra_data_base();
144   for (;; dp_src = MethodData::next_extra(dp_src), dp_dst = MethodData::next_extra(dp_dst)) {
145     assert(dp_src < end_src, "moved past end of extra data");
146     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");
147 
148     int tag = dp_src->tag();
149     switch(tag) {
150     case DataLayout::speculative_trap_data_tag: {
151       ciSpeculativeTrapData data_dst(dp_dst);
152       SpeculativeTrapData   data_src(dp_src);
153       data_dst.translate_from(&data_src);
154       break;
155     }
156     case DataLayout::bit_data_tag:
157       break;
158     case DataLayout::no_tag:
159     case DataLayout::arg_info_data_tag:
160       // An empty slot or ArgInfoData entry marks the end of the trap data
161       {
162         return; // Need a block to avoid SS compiler bug
163       }
164     default:
165       fatal("bad tag = %d", tag);
166     }
167   }
168 }
169 
170 bool ciMethodData::load_data() {
171   MethodData* mdo = get_MethodData();
172   if (mdo == NULL) {
173     return false;
174   }
175 
176   // To do: don't copy the data if it is not "ripe" -- require a minimum #
177   // of invocations.
178 
179   // Snapshot the data and extra parameter data first without the extra trap and arg info data.
180   // Those are copied in a second step. Actually, an approximate snapshot of the data is taken.
181   // Any concurrently executing threads may be changing the data as we copy it.
182   //
183   // The first snapshot step requires two copies (data entries and parameter data entries) since
184   // the MDO is laid out as follows:
185   //
186   //  data_base:        ---------------------------
187   //                    |       data entries      |
188   //                    |           ...           |
189   //  extra_data_base:  ---------------------------
190   //                    |    trap data entries    |
191   //                    |           ...           |
192   //                    | one arg info data entry |
193   //                    |    data for each arg    |
194   //                    |           ...           |
195   //  args_data_limit:  ---------------------------
196   //                    |  parameter data entries |
197   //                    |           ...           |
198   //  extra_data_limit: ---------------------------
199   //
200   // _data_size = extra_data_base - data_base
201   // _extra_data_size = extra_data_limit - extra_data_base
202   // total_size = _data_size + _extra_data_size
203   // args_data_limit = data_base + total_size - parameter_data_size
204 
205 #ifndef ZERO
206   // Some Zero platforms do not have expected alignment, and do not use
207   // this code. static_assert would still fire and fail for them.
208   static_assert(sizeof(_orig) % HeapWordSize == 0, "align");
209 #endif
210   Copy::disjoint_words_atomic((HeapWord*) &mdo->_compiler_counters,
211                               (HeapWord*) &_orig,
212                               sizeof(_orig) / HeapWordSize);
213   Arena* arena = CURRENT_ENV->arena();
214   _data_size = mdo->data_size();
215   _extra_data_size = mdo->extra_data_size();
216   int total_size = _data_size + _extra_data_size;
217   _data = (intptr_t *) arena->Amalloc(total_size);
218   Copy::disjoint_words_atomic((HeapWord*) mdo->data_base(),
219                               (HeapWord*) _data,
220                               _data_size / HeapWordSize);
221 
222   int parameters_data_size = mdo->parameters_size_in_bytes();
223   if (parameters_data_size > 0) {
224     // Snapshot the parameter data
225     Copy::disjoint_words_atomic((HeapWord*) mdo->args_data_limit(),
226                                 (HeapWord*) ((address)_data + total_size - parameters_data_size),
227                                 parameters_data_size / HeapWordSize);
228   }
229   // Traverse the profile data, translating any oops into their
230   // ci equivalents.
231   ResourceMark rm;
232   ciProfileData* ci_data = first_data();
233   ProfileData* data = mdo->first_data();
234   while (is_valid(ci_data)) {
235     ci_data->translate_from(data);
236     ci_data = next_data(ci_data);
237     data = mdo->next_data(data);
238   }
239   if (mdo->parameters_type_data() != NULL) {
240     _parameters = data_layout_at(mdo->parameters_type_data_di());
241     ciParametersTypeData* parameters = new ciParametersTypeData(_parameters);
242     parameters->translate_from(mdo->parameters_type_data());
243   }
244 
245   assert((DataLayout*) ((address)_data + total_size - parameters_data_size) == args_data_limit(),
246       "sanity - parameter data starts after the argument data of the single ArgInfoData entry");
247   load_remaining_extra_data();
248 
249   // Note:  Extra data are all BitData, and do not need translation.
250   _invocation_counter = mdo->invocation_count();
251   _state = mdo->is_mature()? mature_state: immature_state;
252 
253   _eflags = mdo->eflags();
254   _arg_local = mdo->arg_local();
255   _arg_stack = mdo->arg_stack();
256   _arg_returned  = mdo->arg_returned();
257 #ifndef PRODUCT
258   if (ReplayCompiles) {
259     ciReplay::initialize(this);
260     if (is_empty()) {
261       return false;
262     }
263   }
264 #endif
265   return true;
266 }
267 
268 void ciReceiverTypeData::translate_receiver_data_from(const ProfileData* data) {
269   for (uint row = 0; row < row_limit(); row++) {
270     Klass* k = data->as_ReceiverTypeData()->receiver(row);
271     if (k != NULL) {
272       if (k->is_loader_alive()) {
273         ciKlass* klass = CURRENT_ENV->get_klass(k);
274         set_receiver(row, klass);
275       } else {
276         // With concurrent class unloading, the MDO could have stale metadata; override it
277         clear_row(row);
278       }
279     } else {
280       set_receiver(row, NULL);
281     }
282   }
283 }
284 
285 void ciTypeStackSlotEntries::translate_type_data_from(const TypeStackSlotEntries* entries) {
286   for (int i = 0; i < number_of_entries(); i++) {
287     intptr_t k = entries->type(i);
288     Klass* klass = (Klass*)klass_part(k);
289     if (klass != NULL && !klass->is_loader_alive()) {
290       // With concurrent class unloading, the MDO could have stale metadata; override it
291       TypeStackSlotEntries::set_type(i, TypeStackSlotEntries::with_status((Klass*)NULL, k));
292     } else {
293       TypeStackSlotEntries::set_type(i, translate_klass(k));
294     }
295   }
296 }
297 
298 void ciSingleTypeEntry::translate_type_data_from(const SingleTypeEntry* ret) {
299   intptr_t k = ret->type();
300   Klass* klass = (Klass*)klass_part(k);
301   if (klass != NULL && !klass->is_loader_alive()) {
302     // With concurrent class unloading, the MDO could have stale metadata; override it
303     set_type(SingleTypeEntry::with_status((Klass*)NULL, k));
304   } else {
305     set_type(translate_klass(k));
306   }
307 }
308 
309 void ciSpeculativeTrapData::translate_from(const ProfileData* data) {
310   Method* m = data->as_SpeculativeTrapData()->method();
311   ciMethod* ci_m = CURRENT_ENV->get_method(m);
312   set_method(ci_m);
313 }
314 
315 // Get the data at an arbitrary (sort of) data index.
316 ciProfileData* ciMethodData::data_at(int data_index) {
317   if (out_of_bounds(data_index)) {
318     return NULL;
319   }
320   DataLayout* data_layout = data_layout_at(data_index);
321   return data_from(data_layout);
322 }
323 
324 ciProfileData* ciMethodData::data_from(DataLayout* data_layout) {
325   switch (data_layout->tag()) {
326   case DataLayout::no_tag:
327   default:
328     ShouldNotReachHere();
329     return NULL;
330   case DataLayout::bit_data_tag:
331     return new ciBitData(data_layout);
332   case DataLayout::counter_data_tag:
333     return new ciCounterData(data_layout);
334   case DataLayout::jump_data_tag:
335     return new ciJumpData(data_layout);
336   case DataLayout::receiver_type_data_tag:
337     return new ciReceiverTypeData(data_layout);
338   case DataLayout::virtual_call_data_tag:
339     return new ciVirtualCallData(data_layout);
340   case DataLayout::ret_data_tag:
341     return new ciRetData(data_layout);
342   case DataLayout::branch_data_tag:
343     return new ciBranchData(data_layout);
344   case DataLayout::multi_branch_data_tag:
345     return new ciMultiBranchData(data_layout);
346   case DataLayout::arg_info_data_tag:
347     return new ciArgInfoData(data_layout);
348   case DataLayout::call_type_data_tag:
349     return new ciCallTypeData(data_layout);
350   case DataLayout::virtual_call_type_data_tag:
351     return new ciVirtualCallTypeData(data_layout);
352   case DataLayout::parameters_type_data_tag:
353     return new ciParametersTypeData(data_layout);
354   case DataLayout::array_load_store_data_tag:
355     return new ciArrayLoadStoreData(data_layout);
356   case DataLayout::acmp_data_tag:
357     return new ciACmpData(data_layout);
358   };
359 }
360 
361 // Iteration over data.
362 ciProfileData* ciMethodData::next_data(ciProfileData* current) {
363   int current_index = dp_to_di(current->dp());
364   int next_index = current_index + current->size_in_bytes();
365   ciProfileData* next = data_at(next_index);
366   return next;
367 }
368 
369 DataLayout* ciMethodData::next_data_layout(DataLayout* current) {
370   int current_index = dp_to_di((address)current);
371   int next_index = current_index + current->size_in_bytes();
372   if (out_of_bounds(next_index)) {
373     return NULL;
374   }
375   DataLayout* next = data_layout_at(next_index);
376   return next;
377 }
378 
379 ciProfileData* ciMethodData::bci_to_extra_data(int bci, ciMethod* m, bool& two_free_slots) {
380   DataLayout* dp  = extra_data_base();
381   DataLayout* end = args_data_limit();
382   two_free_slots = false;
383   for (;dp < end; dp = MethodData::next_extra(dp)) {
384     switch(dp->tag()) {
385     case DataLayout::no_tag:
386       _saw_free_extra_data = true;  // observed an empty slot (common case)
387       two_free_slots = (MethodData::next_extra(dp)->tag() == DataLayout::no_tag);
388       return NULL;
389     case DataLayout::arg_info_data_tag:
390       return NULL; // ArgInfoData is after the trap data right before the parameter data.
391     case DataLayout::bit_data_tag:
392       if (m == NULL && dp->bci() == bci) {
393         return new ciBitData(dp);
394       }
395       break;
396     case DataLayout::speculative_trap_data_tag: {
397       ciSpeculativeTrapData* data = new ciSpeculativeTrapData(dp);
398       // data->method() might be null if the MDO is snapshotted
399       // concurrently with a trap
400       if (m != NULL && data->method() == m && dp->bci() == bci) {
401         return data;
402       }
403       break;
404     }
405     default:
406       fatal("bad tag = %d", dp->tag());
407     }
408   }
409   return NULL;
410 }
411 
412 // Translate a bci to its corresponding data, or NULL.
413 ciProfileData* ciMethodData::bci_to_data(int bci, ciMethod* m) {
414   // If m is not NULL we look for a SpeculativeTrapData entry
415   if (m == NULL) {
416     DataLayout* data_layout = data_layout_before(bci);
417     for ( ; is_valid(data_layout); data_layout = next_data_layout(data_layout)) {
418       if (data_layout->bci() == bci) {
419         set_hint_di(dp_to_di((address)data_layout));
420         return data_from(data_layout);
421       } else if (data_layout->bci() > bci) {
422         break;
423       }
424     }
425   }
426   bool two_free_slots = false;
427   ciProfileData* result = bci_to_extra_data(bci, m, two_free_slots);
428   if (result != NULL) {
429     return result;
430   }
431   if (m != NULL && !two_free_slots) {
432     // We were looking for a SpeculativeTrapData entry we didn't
433     // find. Room is not available for more SpeculativeTrapData
434     // entries, look in the non SpeculativeTrapData entries.
435     return bci_to_data(bci, NULL);
436   }
437   return NULL;
438 }
439 
440 // Conservatively decode the trap_state of a ciProfileData.
441 int ciMethodData::has_trap_at(ciProfileData* data, int reason) {
442   typedef Deoptimization::DeoptReason DR_t;
443   int per_bc_reason
444     = Deoptimization::reason_recorded_per_bytecode_if_any((DR_t) reason);
445   if (trap_count(reason) == 0) {
446     // Impossible for this trap to have occurred, regardless of trap_state.
447     // Note:  This happens if the MDO is empty.
448     return 0;
449   } else if (per_bc_reason == Deoptimization::Reason_none) {
450     // We cannot conclude anything; a trap happened somewhere, maybe here.
451     return -1;
452   } else if (data == NULL) {
453     // No profile here, not even an extra_data record allocated on the fly.
454     // If there are empty extra_data records, and there had been a trap,
455     // there would have been a non-null data pointer.  If there are no
456     // free extra_data records, we must return a conservative -1.
457     if (_saw_free_extra_data)
458       return 0;                 // Q.E.D.
459     else
460       return -1;                // bail with a conservative answer
461   } else {
462     return Deoptimization::trap_state_has_reason(data->trap_state(), per_bc_reason);
463   }
464 }
465 
466 int ciMethodData::trap_recompiled_at(ciProfileData* data) {
467   if (data == NULL) {
468     return (_saw_free_extra_data? 0: -1);  // (see previous method)
469   } else {
470     return Deoptimization::trap_state_is_recompiled(data->trap_state())? 1: 0;
471   }
472 }
473 
474 void ciMethodData::clear_escape_info() {
475   VM_ENTRY_MARK;
476   MethodData* mdo = get_MethodData();
477   if (mdo != NULL) {
478     mdo->clear_escape_info();
479     ArgInfoData *aid = arg_info();
480     int arg_count = (aid == NULL) ? 0 : aid->number_of_args();
481     for (int i = 0; i < arg_count; i++) {
482       set_arg_modified(i, 0);
483     }
484   }
485   _eflags = _arg_local = _arg_stack = _arg_returned = 0;
486 }
487 
488 // copy our escape info to the MethodData* if it exists
489 void ciMethodData::update_escape_info() {
490   VM_ENTRY_MARK;
491   MethodData* mdo = get_MethodData();
492   if ( mdo != NULL) {
493     mdo->set_eflags(_eflags);
494     mdo->set_arg_local(_arg_local);
495     mdo->set_arg_stack(_arg_stack);
496     mdo->set_arg_returned(_arg_returned);
497     int arg_count = mdo->method()->size_of_parameters();
498     for (int i = 0; i < arg_count; i++) {
499       mdo->set_arg_modified(i, arg_modified(i));
500     }
501   }
502 }
503 
504 void ciMethodData::set_compilation_stats(short loops, short blocks) {
505   VM_ENTRY_MARK;
506   MethodData* mdo = get_MethodData();
507   if (mdo != NULL) {
508     mdo->set_num_loops(loops);
509     mdo->set_num_blocks(blocks);
510   }
511 }
512 
513 void ciMethodData::set_would_profile(bool p) {
514   VM_ENTRY_MARK;
515   MethodData* mdo = get_MethodData();
516   if (mdo != NULL) {
517     mdo->set_would_profile(p);
518   }
519 }
520 
521 void ciMethodData::set_argument_type(int bci, int i, ciKlass* k) {
522   VM_ENTRY_MARK;
523   MethodData* mdo = get_MethodData();
524   if (mdo != NULL) {
525     ProfileData* data = mdo->bci_to_data(bci);
526     if (data != NULL) {
527       if (data->is_CallTypeData()) {
528         data->as_CallTypeData()->set_argument_type(i, k->get_Klass());
529       } else {
530         assert(data->is_VirtualCallTypeData(), "no arguments!");
531         data->as_VirtualCallTypeData()->set_argument_type(i, k->get_Klass());
532       }
533     }
534   }
535 }
536 
537 void ciMethodData::set_parameter_type(int i, ciKlass* k) {
538   VM_ENTRY_MARK;
539   MethodData* mdo = get_MethodData();
540   if (mdo != NULL) {
541     mdo->parameters_type_data()->set_type(i, k->get_Klass());
542   }
543 }
544 
545 void ciMethodData::set_return_type(int bci, ciKlass* k) {
546   VM_ENTRY_MARK;
547   MethodData* mdo = get_MethodData();
548   if (mdo != NULL) {
549     ProfileData* data = mdo->bci_to_data(bci);
550     if (data != NULL) {
551       if (data->is_CallTypeData()) {
552         data->as_CallTypeData()->set_return_type(k->get_Klass());
553       } else {
554         assert(data->is_VirtualCallTypeData(), "no arguments!");
555         data->as_VirtualCallTypeData()->set_return_type(k->get_Klass());
556       }
557     }
558   }
559 }
560 
561 bool ciMethodData::has_escape_info() {
562   return eflag_set(MethodData::estimated);
563 }
564 
565 void ciMethodData::set_eflag(MethodData::EscapeFlag f) {
566   set_bits(_eflags, f);
567 }
568 
569 bool ciMethodData::eflag_set(MethodData::EscapeFlag f) const {
570   return mask_bits(_eflags, f) != 0;
571 }
572 
573 void ciMethodData::set_arg_local(int i) {
574   set_nth_bit(_arg_local, i);
575 }
576 
577 void ciMethodData::set_arg_stack(int i) {
578   set_nth_bit(_arg_stack, i);
579 }
580 
581 void ciMethodData::set_arg_returned(int i) {
582   set_nth_bit(_arg_returned, i);
583 }
584 
585 void ciMethodData::set_arg_modified(int arg, uint val) {
586   ArgInfoData *aid = arg_info();
587   if (aid == NULL)
588     return;
589   assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number");
590   aid->set_arg_modified(arg, val);
591 }
592 
593 bool ciMethodData::is_arg_local(int i) const {
594   return is_set_nth_bit(_arg_local, i);
595 }
596 
597 bool ciMethodData::is_arg_stack(int i) const {
598   return is_set_nth_bit(_arg_stack, i);
599 }
600 
601 bool ciMethodData::is_arg_returned(int i) const {
602   return is_set_nth_bit(_arg_returned, i);
603 }
604 
605 uint ciMethodData::arg_modified(int arg) const {
606   ArgInfoData *aid = arg_info();
607   if (aid == NULL)
608     return 0;
609   assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number");
610   return aid->arg_modified(arg);
611 }
612 
613 ByteSize ciMethodData::offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data) {
614   // Get offset within MethodData* of the data array
615   ByteSize data_offset = MethodData::data_offset();
616 
617   // Get cell offset of the ProfileData within data array
618   int cell_offset = dp_to_di(data->dp());
619 
620   // Add in counter_offset, the # of bytes into the ProfileData of counter or flag
621   int offset = in_bytes(data_offset) + cell_offset + in_bytes(slot_offset_in_data);
622 
623   return in_ByteSize(offset);
624 }
625 
626 ciArgInfoData *ciMethodData::arg_info() const {
627   // Should be last, have to skip all traps.
628   DataLayout* dp  = extra_data_base();
629   DataLayout* end = args_data_limit();
630   for (; dp < end; dp = MethodData::next_extra(dp)) {
631     if (dp->tag() == DataLayout::arg_info_data_tag)
632       return new ciArgInfoData(dp);
633   }
634   return NULL;
635 }
636 
637 
638 // Implementation of the print method.
639 void ciMethodData::print_impl(outputStream* st) {
640   ciMetadata::print_impl(st);
641 }
642 
643 void ciMethodData::dump_replay_data_type_helper(outputStream* out, int round, int& count, ProfileData* pdata, ByteSize offset, ciKlass* k) {
644   if (k != NULL) {
645     if (round == 0) {
646       count++;
647     } else {
648       out->print(" %d %s", (int)(dp_to_di(pdata->dp() + in_bytes(offset)) / sizeof(intptr_t)),
649                            CURRENT_ENV->replay_name(k));
650     }
651   }
652 }
653 
654 template<class T> void ciMethodData::dump_replay_data_receiver_type_helper(outputStream* out, int round, int& count, T* vdata) {
655   for (uint i = 0; i < vdata->row_limit(); i++) {
656     dump_replay_data_type_helper(out, round, count, vdata, vdata->receiver_offset(i), vdata->receiver(i));
657   }
658 }
659 
660 template<class T> void ciMethodData::dump_replay_data_call_type_helper(outputStream* out, int round, int& count, T* call_type_data) {
661   if (call_type_data->has_arguments()) {
662     for (int i = 0; i < call_type_data->number_of_arguments(); i++) {
663       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));
664     }
665   }
666   if (call_type_data->has_return()) {
667     dump_replay_data_type_helper(out, round, count, call_type_data, call_type_data->return_type_offset(), call_type_data->valid_return_type());
668   }
669 }
670 
671 void ciMethodData::dump_replay_data_extra_data_helper(outputStream* out, int round, int& count) {
672   DataLayout* dp  = extra_data_base();
673   DataLayout* end = args_data_limit();
674 
675   for (;dp < end; dp = MethodData::next_extra(dp)) {
676     switch(dp->tag()) {
677     case DataLayout::no_tag:
678     case DataLayout::arg_info_data_tag:
679       return;
680     case DataLayout::bit_data_tag:
681       break;
682     case DataLayout::speculative_trap_data_tag: {
683       ciSpeculativeTrapData* data = new ciSpeculativeTrapData(dp);
684       ciMethod* m = data->method();
685       if (m != NULL) {
686         if (round == 0) {
687           count++;
688         } else {
689           out->print(" %d ", (int)(dp_to_di(((address)dp) + in_bytes(ciSpeculativeTrapData::method_offset())) / sizeof(intptr_t)));
690           m->dump_name_as_ascii(out);
691         }
692       }
693       break;
694     }
695     default:
696       fatal("bad tag = %d", dp->tag());
697     }
698   }
699 }
700 
701 void ciMethodData::dump_replay_data(outputStream* out) {
702   ResourceMark rm;
703   MethodData* mdo = get_MethodData();
704   Method* method = mdo->method();
705   out->print("ciMethodData ");
706   ciMethod::dump_name_as_ascii(out, method);
707   out->print(" %d %d", _state, _invocation_counter);
708 
709   // dump the contents of the MDO header as raw data
710   unsigned char* orig = (unsigned char*)&_orig;
711   int length = sizeof(_orig);
712   out->print(" orig %d", length);
713   for (int i = 0; i < length; i++) {
714     out->print(" %d", orig[i]);
715   }
716 
717   // dump the MDO data as raw data
718   int elements = (data_size() + extra_data_size()) / sizeof(intptr_t);
719   out->print(" data %d", elements);
720   for (int i = 0; i < elements; i++) {
721     // We could use INTPTR_FORMAT here but that's zero justified
722     // which makes comparing it with the SA version of this output
723     // harder. data()'s element type is intptr_t.
724     out->print(" " INTPTRNZ_FORMAT, data()[i]);
725   }
726 
727   // The MDO contained oop references as ciObjects, so scan for those
728   // and emit pairs of offset and klass name so that they can be
729   // reconstructed at runtime.  The first round counts the number of
730   // oop references and the second actually emits them.
731   ciParametersTypeData* parameters = parameters_type_data();
732   for (int count = 0, round = 0; round < 2; round++) {
733     if (round == 1) out->print(" oops %d", count);
734     ProfileData* pdata = first_data();
735     for ( ; is_valid(pdata); pdata = next_data(pdata)) {
736       if (pdata->is_VirtualCallData()) {
737         ciVirtualCallData* vdata = (ciVirtualCallData*)pdata;
738         dump_replay_data_receiver_type_helper<ciVirtualCallData>(out, round, count, vdata);
739         if (pdata->is_VirtualCallTypeData()) {
740           ciVirtualCallTypeData* call_type_data = (ciVirtualCallTypeData*)pdata;
741           dump_replay_data_call_type_helper<ciVirtualCallTypeData>(out, round, count, call_type_data);
742         }
743       } else if (pdata->is_ReceiverTypeData()) {
744         ciReceiverTypeData* vdata = (ciReceiverTypeData*)pdata;
745         dump_replay_data_receiver_type_helper<ciReceiverTypeData>(out, round, count, vdata);
746       } else if (pdata->is_CallTypeData()) {
747           ciCallTypeData* call_type_data = (ciCallTypeData*)pdata;
748           dump_replay_data_call_type_helper<ciCallTypeData>(out, round, count, call_type_data);
749       } else if (pdata->is_ArrayLoadStoreData()) {
750         ciArrayLoadStoreData* array_load_store_data = (ciArrayLoadStoreData*)pdata;
751         dump_replay_data_type_helper(out, round, count, array_load_store_data, ciArrayLoadStoreData::array_offset(),
752                                      array_load_store_data->array()->valid_type());
753         dump_replay_data_type_helper(out, round, count, array_load_store_data, ciArrayLoadStoreData::element_offset(),
754                                      array_load_store_data->element()->valid_type());
755       } else if (pdata->is_ACmpData()) {
756         ciACmpData* acmp_data = (ciACmpData*)pdata;
757         dump_replay_data_type_helper(out, round, count, acmp_data, ciACmpData::left_offset(),
758                                      acmp_data->left()->valid_type());
759         dump_replay_data_type_helper(out, round, count, acmp_data, ciACmpData::right_offset(),
760                                      acmp_data->right()->valid_type());
761 
762       }
763     }
764     if (parameters != NULL) {
765       for (int i = 0; i < parameters->number_of_parameters(); i++) {
766         dump_replay_data_type_helper(out, round, count, parameters, ParametersTypeData::type_offset(i), parameters->valid_parameter_type(i));
767       }
768     }
769   }
770   for (int count = 0, round = 0; round < 2; round++) {
771     if (round == 1) out->print(" methods %d", count);
772     dump_replay_data_extra_data_helper(out, round, count);
773   }
774   out->cr();
775 }
776 
777 #ifndef PRODUCT
778 void ciMethodData::print() {
779   print_data_on(tty);
780 }
781 
782 void ciMethodData::print_data_on(outputStream* st) {
783   ResourceMark rm;
784   ciParametersTypeData* parameters = parameters_type_data();
785   if (parameters != NULL) {
786     parameters->print_data_on(st);
787   }
788   ciProfileData* data;
789   for (data = first_data(); is_valid(data); data = next_data(data)) {
790     st->print("%d", dp_to_di(data->dp()));
791     st->fill_to(6);
792     data->print_data_on(st);
793   }
794   st->print_cr("--- Extra data:");
795   DataLayout* dp  = extra_data_base();
796   DataLayout* end = args_data_limit();
797   for (;; dp = MethodData::next_extra(dp)) {
798     assert(dp < end, "moved past end of extra data");
799     switch (dp->tag()) {
800     case DataLayout::no_tag:
801       continue;
802     case DataLayout::bit_data_tag:
803       data = new BitData(dp);
804       break;
805     case DataLayout::arg_info_data_tag:
806       data = new ciArgInfoData(dp);
807       dp = end; // ArgInfoData is after the trap data right before the parameter data.
808       break;
809     case DataLayout::speculative_trap_data_tag:
810       data = new ciSpeculativeTrapData(dp);
811       break;
812     default:
813       fatal("unexpected tag %d", dp->tag());
814     }
815     st->print("%d", dp_to_di(data->dp()));
816     st->fill_to(6);
817     data->print_data_on(st);
818     if (dp >= end) return;
819   }
820 }
821 
822 void ciTypeEntries::print_ciklass(outputStream* st, intptr_t k) {
823   if (TypeEntries::is_type_none(k)) {
824     st->print("none");
825   } else if (TypeEntries::is_type_unknown(k)) {
826     st->print("unknown");
827   } else {
828     valid_ciklass(k)->print_name_on(st);
829   }
830   if (TypeEntries::was_null_seen(k)) {
831     st->print(" (null seen)");
832   }
833 }
834 
835 void ciTypeStackSlotEntries::print_data_on(outputStream* st) const {
836   for (int i = 0; i < number_of_entries(); i++) {
837     _pd->tab(st);
838     st->print("%d: stack (%u) ", i, stack_slot(i));
839     print_ciklass(st, type(i));
840     st->cr();
841   }
842 }
843 
844 void ciSingleTypeEntry::print_data_on(outputStream* st) const {
845   _pd->tab(st);
846   st->print("ret ");
847   print_ciklass(st, type());
848   st->cr();
849 }
850 
851 void ciCallTypeData::print_data_on(outputStream* st, const char* extra) const {
852   print_shared(st, "ciCallTypeData", extra);
853   if (has_arguments()) {
854     tab(st, true);
855     st->print_cr("argument types");
856     args()->print_data_on(st);
857   }
858   if (has_return()) {
859     tab(st, true);
860     st->print_cr("return type");
861     ret()->print_data_on(st);
862   }
863 }
864 
865 void ciReceiverTypeData::print_receiver_data_on(outputStream* st) const {
866   uint row;
867   int entries = 0;
868   for (row = 0; row < row_limit(); row++) {
869     if (receiver(row) != NULL)  entries++;
870   }
871   st->print_cr("count(%u) entries(%u)", count(), entries);
872   for (row = 0; row < row_limit(); row++) {
873     if (receiver(row) != NULL) {
874       tab(st);
875       receiver(row)->print_name_on(st);
876       st->print_cr("(%u)", receiver_count(row));
877     }
878   }
879 }
880 
881 void ciReceiverTypeData::print_data_on(outputStream* st, const char* extra) const {
882   print_shared(st, "ciReceiverTypeData", extra);
883   print_receiver_data_on(st);
884 }
885 
886 void ciVirtualCallData::print_data_on(outputStream* st, const char* extra) const {
887   print_shared(st, "ciVirtualCallData", extra);
888   rtd_super()->print_receiver_data_on(st);
889 }
890 
891 void ciVirtualCallTypeData::print_data_on(outputStream* st, const char* extra) const {
892   print_shared(st, "ciVirtualCallTypeData", extra);
893   rtd_super()->print_receiver_data_on(st);
894   if (has_arguments()) {
895     tab(st, true);
896     st->print("argument types");
897     args()->print_data_on(st);
898   }
899   if (has_return()) {
900     tab(st, true);
901     st->print("return type");
902     ret()->print_data_on(st);
903   }
904 }
905 
906 void ciParametersTypeData::print_data_on(outputStream* st, const char* extra) const {
907   st->print_cr("ciParametersTypeData");
908   parameters()->print_data_on(st);
909 }
910 
911 void ciSpeculativeTrapData::print_data_on(outputStream* st, const char* extra) const {
912   st->print_cr("ciSpeculativeTrapData");
913   tab(st);
914   method()->print_short_name(st);
915   st->cr();
916 }
917 
918 void ciArrayLoadStoreData::print_data_on(outputStream* st, const char* extra) const {
919   print_shared(st, "ciArrayLoadStoreData", extra);
920   tab(st, true);
921   st->print("array");
922   array()->print_data_on(st);
923   tab(st, true);
924   st->print("element");
925   element()->print_data_on(st);
926 }
927 
928 void ciACmpData::print_data_on(outputStream* st, const char* extra) const {
929   BranchData::print_data_on(st, extra);
930   st->cr();
931   tab(st, true);
932   st->print("left");
933   left()->print_data_on(st);
934   tab(st, true);
935   st->print("right");
936   right()->print_data_on(st);
937 }
938 #endif