1 /*
  2  * Copyright (c) 2001, 2017, 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 "memory/allocation.inline.hpp"
 31 #include "memory/resourceArea.hpp"
 32 #include "runtime/deoptimization.hpp"
 33 #include "utilities/copy.hpp"
 34 
 35 // ciMethodData
 36 
 37 // ------------------------------------------------------------------
 38 // ciMethodData::ciMethodData
 39 //
 40 ciMethodData::ciMethodData(MethodData* md) : ciMetadata(md) {
 41   assert(md != NULL, "no null method data");
 42   Copy::zero_to_words((HeapWord*) &_orig, sizeof(_orig) / sizeof(HeapWord));
 43   _data = NULL;
 44   _data_size = 0;
 45   _extra_data_size = 0;
 46   _current_mileage = 0;
 47   _invocation_counter = 0;
 48   _backedge_counter = 0;
 49   _state = empty_state;
 50   _saw_free_extra_data = false;
 51   // Set an initial hint. Don't use set_hint_di() because
 52   // first_di() may be out of bounds if data_size is 0.
 53   _hint_di = first_di();
 54   // Initialize the escape information (to "don't know.");
 55   _eflags = _arg_local = _arg_stack = _arg_returned = 0;
 56   _parameters = NULL;
 57 }
 58 
 59 // ------------------------------------------------------------------
 60 // ciMethodData::ciMethodData
 61 //
 62 // No MethodData*.
 63 ciMethodData::ciMethodData() : ciMetadata(NULL) {
 64   Copy::zero_to_words((HeapWord*) &_orig, sizeof(_orig) / sizeof(HeapWord));
 65   _data = NULL;
 66   _data_size = 0;
 67   _extra_data_size = 0;
 68   _current_mileage = 0;
 69   _invocation_counter = 0;
 70   _backedge_counter = 0;
 71   _state = empty_state;
 72   _saw_free_extra_data = false;
 73   // Set an initial hint. Don't use set_hint_di() because
 74   // first_di() may be out of bounds if data_size is 0.
 75   _hint_di = first_di();
 76   // Initialize the escape information (to "don't know.");
 77   _eflags = _arg_local = _arg_stack = _arg_returned = 0;
 78   _parameters = NULL;
 79 }
 80 
 81 void ciMethodData::load_extra_data() {
 82   MethodData* mdo = get_MethodData();
 83 
 84   MutexLocker ml(mdo->extra_data_lock());
 85 
 86   // speculative trap entries also hold a pointer to a Method so need to be translated
 87   DataLayout* dp_src  = mdo->extra_data_base();
 88   DataLayout* end_src = mdo->args_data_limit();
 89   DataLayout* dp_dst  = extra_data_base();
 90   for (;; dp_src = MethodData::next_extra(dp_src), dp_dst = MethodData::next_extra(dp_dst)) {
 91     assert(dp_src < end_src, "moved past end of extra data");
 92     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");
 93 
 94     // New traps in the MDO may have been added since we copied the
 95     // data (concurrent deoptimizations before we acquired
 96     // extra_data_lock above) or can be removed (a safepoint may occur
 97     // in the translate_from call below) as we translate the copy:
 98     // update the copy as we go.
 99     int tag = dp_src->tag();
100     if (tag != DataLayout::arg_info_data_tag) {
101       memcpy(dp_dst, dp_src, ((intptr_t)MethodData::next_extra(dp_src)) - ((intptr_t)dp_src));
102     }
103 
104     switch(tag) {
105     case DataLayout::speculative_trap_data_tag: {
106       ciSpeculativeTrapData data_dst(dp_dst);
107       SpeculativeTrapData   data_src(dp_src);
108 
109       { // During translation a safepoint can happen or VM lock can be taken (e.g., Compile_lock).
110         MutexUnlocker ml(mdo->extra_data_lock());
111         data_dst.translate_from(&data_src);
112       }
113       break;
114     }
115     case DataLayout::bit_data_tag:
116       break;
117     case DataLayout::no_tag:
118     case DataLayout::arg_info_data_tag:
119       // An empty slot or ArgInfoData entry marks the end of the trap data
120       {
121         return; // Need a block to avoid SS compiler bug
122       }
123     default:
124       fatal("bad tag = %d", tag);
125     }
126   }
127 }
128 
129 void ciMethodData::load_data() {
130   MethodData* mdo = get_MethodData();
131   if (mdo == NULL) {
132     return;
133   }
134 
135   // To do: don't copy the data if it is not "ripe" -- require a minimum #
136   // of invocations.
137 
138   // Snapshot the data -- actually, take an approximate snapshot of
139   // the data.  Any concurrently executing threads may be changing the
140   // data as we copy it.
141   Copy::disjoint_words((HeapWord*) mdo,
142                        (HeapWord*) &_orig,
143                        sizeof(_orig) / HeapWordSize);
144   Arena* arena = CURRENT_ENV->arena();
145   _data_size = mdo->data_size();
146   _extra_data_size = mdo->extra_data_size();
147   int total_size = _data_size + _extra_data_size;
148   _data = (intptr_t *) arena->Amalloc(total_size);
149   Copy::disjoint_words((HeapWord*) mdo->data_base(), (HeapWord*) _data, total_size / HeapWordSize);
150 
151   // Traverse the profile data, translating any oops into their
152   // ci equivalents.
153   ResourceMark rm;
154   ciProfileData* ci_data = first_data();
155   ProfileData* data = mdo->first_data();
156   while (is_valid(ci_data)) {
157     ci_data->translate_from(data);
158     ci_data = next_data(ci_data);
159     data = mdo->next_data(data);
160   }
161   if (mdo->parameters_type_data() != NULL) {
162     _parameters = data_layout_at(mdo->parameters_type_data_di());
163     ciParametersTypeData* parameters = new ciParametersTypeData(_parameters);
164     parameters->translate_from(mdo->parameters_type_data());
165   }
166 
167   load_extra_data();
168 
169   // Note:  Extra data are all BitData, and do not need translation.
170   _current_mileage = MethodData::mileage_of(mdo->method());
171   _invocation_counter = mdo->invocation_count();
172   _backedge_counter = mdo->backedge_count();
173   _state = mdo->is_mature()? mature_state: immature_state;
174 
175   _eflags = mdo->eflags();
176   _arg_local = mdo->arg_local();
177   _arg_stack = mdo->arg_stack();
178   _arg_returned  = mdo->arg_returned();
179 #ifndef PRODUCT
180   if (ReplayCompiles) {
181     ciReplay::initialize(this);
182   }
183 #endif
184 }
185 
186 void ciReceiverTypeData::translate_receiver_data_from(const ProfileData* data) {
187   for (uint row = 0; row < row_limit(); row++) {
188     Klass* k = data->as_ReceiverTypeData()->receiver(row);
189     if (k != NULL) {
190       if (k->is_loader_alive()) {
191         ciKlass* klass = CURRENT_ENV->get_klass(k);
192         set_receiver(row, klass);
193       } else {
194         // With concurrent class unloading, the MDO could have stale metadata; override it
195         clear_row(row);
196       }
197     }
198   }
199 }
200 
201 
202 void ciTypeStackSlotEntries::translate_type_data_from(const TypeStackSlotEntries* entries) {
203   for (int i = 0; i < number_of_entries(); i++) {
204     intptr_t k = entries->type(i);
205     TypeStackSlotEntries::set_type(i, translate_klass(k));
206   }
207 }
208 
209 void ciReturnTypeEntry::translate_type_data_from(const ReturnTypeEntry* ret) {
210   intptr_t k = ret->type();
211   set_type(translate_klass(k));
212 }
213 
214 void ciSpeculativeTrapData::translate_from(const ProfileData* data) {
215   Method* m = data->as_SpeculativeTrapData()->method();
216   ciMethod* ci_m = CURRENT_ENV->get_method(m);
217   set_method(ci_m);
218 }
219 
220 // Get the data at an arbitrary (sort of) data index.
221 ciProfileData* ciMethodData::data_at(int data_index) {
222   if (out_of_bounds(data_index)) {
223     return NULL;
224   }
225   DataLayout* data_layout = data_layout_at(data_index);
226 
227   switch (data_layout->tag()) {
228   case DataLayout::no_tag:
229   default:
230     ShouldNotReachHere();
231     return NULL;
232   case DataLayout::bit_data_tag:
233     return new ciBitData(data_layout);
234   case DataLayout::counter_data_tag:
235     return new ciCounterData(data_layout);
236   case DataLayout::jump_data_tag:
237     return new ciJumpData(data_layout);
238   case DataLayout::receiver_type_data_tag:
239     return new ciReceiverTypeData(data_layout);
240   case DataLayout::virtual_call_data_tag:
241     return new ciVirtualCallData(data_layout);
242   case DataLayout::ret_data_tag:
243     return new ciRetData(data_layout);
244   case DataLayout::branch_data_tag:
245     return new ciBranchData(data_layout);
246   case DataLayout::multi_branch_data_tag:
247     return new ciMultiBranchData(data_layout);
248   case DataLayout::arg_info_data_tag:
249     return new ciArgInfoData(data_layout);
250   case DataLayout::call_type_data_tag:
251     return new ciCallTypeData(data_layout);
252   case DataLayout::virtual_call_type_data_tag:
253     return new ciVirtualCallTypeData(data_layout);
254   case DataLayout::parameters_type_data_tag:
255     return new ciParametersTypeData(data_layout);
256   };
257 }
258 
259 // Iteration over data.
260 ciProfileData* ciMethodData::next_data(ciProfileData* current) {
261   int current_index = dp_to_di(current->dp());
262   int next_index = current_index + current->size_in_bytes();
263   ciProfileData* next = data_at(next_index);
264   return next;
265 }
266 
267 ciProfileData* ciMethodData::bci_to_extra_data(int bci, ciMethod* m, bool& two_free_slots) {
268   DataLayout* dp  = extra_data_base();
269   DataLayout* end = args_data_limit();
270   two_free_slots = false;
271   for (;dp < end; dp = MethodData::next_extra(dp)) {
272     switch(dp->tag()) {
273     case DataLayout::no_tag:
274       _saw_free_extra_data = true;  // observed an empty slot (common case)
275       two_free_slots = (MethodData::next_extra(dp)->tag() == DataLayout::no_tag);
276       return NULL;
277     case DataLayout::arg_info_data_tag:
278       return NULL; // ArgInfoData is at the end of extra data section.
279     case DataLayout::bit_data_tag:
280       if (m == NULL && dp->bci() == bci) {
281         return new ciBitData(dp);
282       }
283       break;
284     case DataLayout::speculative_trap_data_tag: {
285       ciSpeculativeTrapData* data = new ciSpeculativeTrapData(dp);
286       // data->method() might be null if the MDO is snapshotted
287       // concurrently with a trap
288       if (m != NULL && data->method() == m && dp->bci() == bci) {
289         return data;
290       }
291       break;
292     }
293     default:
294       fatal("bad tag = %d", dp->tag());
295     }
296   }
297   return NULL;
298 }
299 
300 // Translate a bci to its corresponding data, or NULL.
301 ciProfileData* ciMethodData::bci_to_data(int bci, ciMethod* m) {
302   // If m is not NULL we look for a SpeculativeTrapData entry
303   if (m == NULL) {
304     ciProfileData* data = data_before(bci);
305     for ( ; is_valid(data); data = next_data(data)) {
306       if (data->bci() == bci) {
307         set_hint_di(dp_to_di(data->dp()));
308         return data;
309       } else if (data->bci() > bci) {
310         break;
311       }
312     }
313   }
314   bool two_free_slots = false;
315   ciProfileData* result = bci_to_extra_data(bci, m, two_free_slots);
316   if (result != NULL) {
317     return result;
318   }
319   if (m != NULL && !two_free_slots) {
320     // We were looking for a SpeculativeTrapData entry we didn't
321     // find. Room is not available for more SpeculativeTrapData
322     // entries, look in the non SpeculativeTrapData entries.
323     return bci_to_data(bci, NULL);
324   }
325   return NULL;
326 }
327 
328 // Conservatively decode the trap_state of a ciProfileData.
329 int ciMethodData::has_trap_at(ciProfileData* data, int reason) {
330   typedef Deoptimization::DeoptReason DR_t;
331   int per_bc_reason
332     = Deoptimization::reason_recorded_per_bytecode_if_any((DR_t) reason);
333   if (trap_count(reason) == 0) {
334     // Impossible for this trap to have occurred, regardless of trap_state.
335     // Note:  This happens if the MDO is empty.
336     return 0;
337   } else if (per_bc_reason == Deoptimization::Reason_none) {
338     // We cannot conclude anything; a trap happened somewhere, maybe here.
339     return -1;
340   } else if (data == NULL) {
341     // No profile here, not even an extra_data record allocated on the fly.
342     // If there are empty extra_data records, and there had been a trap,
343     // there would have been a non-null data pointer.  If there are no
344     // free extra_data records, we must return a conservative -1.
345     if (_saw_free_extra_data)
346       return 0;                 // Q.E.D.
347     else
348       return -1;                // bail with a conservative answer
349   } else {
350     return Deoptimization::trap_state_has_reason(data->trap_state(), per_bc_reason);
351   }
352 }
353 
354 int ciMethodData::trap_recompiled_at(ciProfileData* data) {
355   if (data == NULL) {
356     return (_saw_free_extra_data? 0: -1);  // (see previous method)
357   } else {
358     return Deoptimization::trap_state_is_recompiled(data->trap_state())? 1: 0;
359   }
360 }
361 
362 void ciMethodData::clear_escape_info() {
363   VM_ENTRY_MARK;
364   MethodData* mdo = get_MethodData();
365   if (mdo != NULL) {
366     mdo->clear_escape_info();
367     ArgInfoData *aid = arg_info();
368     int arg_count = (aid == NULL) ? 0 : aid->number_of_args();
369     for (int i = 0; i < arg_count; i++) {
370       set_arg_modified(i, 0);
371     }
372   }
373   _eflags = _arg_local = _arg_stack = _arg_returned = 0;
374 }
375 
376 // copy our escape info to the MethodData* if it exists
377 void ciMethodData::update_escape_info() {
378   VM_ENTRY_MARK;
379   MethodData* mdo = get_MethodData();
380   if ( mdo != NULL) {
381     mdo->set_eflags(_eflags);
382     mdo->set_arg_local(_arg_local);
383     mdo->set_arg_stack(_arg_stack);
384     mdo->set_arg_returned(_arg_returned);
385     int arg_count = mdo->method()->size_of_parameters();
386     for (int i = 0; i < arg_count; i++) {
387       mdo->set_arg_modified(i, arg_modified(i));
388     }
389   }
390 }
391 
392 void ciMethodData::set_compilation_stats(short loops, short blocks) {
393   VM_ENTRY_MARK;
394   MethodData* mdo = get_MethodData();
395   if (mdo != NULL) {
396     mdo->set_num_loops(loops);
397     mdo->set_num_blocks(blocks);
398   }
399 }
400 
401 void ciMethodData::set_would_profile(bool p) {
402   VM_ENTRY_MARK;
403   MethodData* mdo = get_MethodData();
404   if (mdo != NULL) {
405     mdo->set_would_profile(p);
406   }
407 }
408 
409 void ciMethodData::set_argument_type(int bci, int i, ciKlass* k) {
410   VM_ENTRY_MARK;
411   MethodData* mdo = get_MethodData();
412   if (mdo != NULL) {
413     ProfileData* data = mdo->bci_to_data(bci);
414     if (data != NULL) {
415       if (data->is_CallTypeData()) {
416         data->as_CallTypeData()->set_argument_type(i, k->get_Klass());
417       } else {
418         assert(data->is_VirtualCallTypeData(), "no arguments!");
419         data->as_VirtualCallTypeData()->set_argument_type(i, k->get_Klass());
420       }
421     }
422   }
423 }
424 
425 void ciMethodData::set_parameter_type(int i, ciKlass* k) {
426   VM_ENTRY_MARK;
427   MethodData* mdo = get_MethodData();
428   if (mdo != NULL) {
429     mdo->parameters_type_data()->set_type(i, k->get_Klass());
430   }
431 }
432 
433 void ciMethodData::set_return_type(int bci, ciKlass* k) {
434   VM_ENTRY_MARK;
435   MethodData* mdo = get_MethodData();
436   if (mdo != NULL) {
437     ProfileData* data = mdo->bci_to_data(bci);
438     if (data != NULL) {
439       if (data->is_CallTypeData()) {
440         data->as_CallTypeData()->set_return_type(k->get_Klass());
441       } else {
442         assert(data->is_VirtualCallTypeData(), "no arguments!");
443         data->as_VirtualCallTypeData()->set_return_type(k->get_Klass());
444       }
445     }
446   }
447 }
448 
449 bool ciMethodData::has_escape_info() {
450   return eflag_set(MethodData::estimated);
451 }
452 
453 void ciMethodData::set_eflag(MethodData::EscapeFlag f) {
454   set_bits(_eflags, f);
455 }
456 
457 void ciMethodData::clear_eflag(MethodData::EscapeFlag f) {
458   clear_bits(_eflags, f);
459 }
460 
461 bool ciMethodData::eflag_set(MethodData::EscapeFlag f) const {
462   return mask_bits(_eflags, f) != 0;
463 }
464 
465 void ciMethodData::set_arg_local(int i) {
466   set_nth_bit(_arg_local, i);
467 }
468 
469 void ciMethodData::set_arg_stack(int i) {
470   set_nth_bit(_arg_stack, i);
471 }
472 
473 void ciMethodData::set_arg_returned(int i) {
474   set_nth_bit(_arg_returned, i);
475 }
476 
477 void ciMethodData::set_arg_modified(int arg, uint val) {
478   ArgInfoData *aid = arg_info();
479   if (aid == NULL)
480     return;
481   assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number");
482   aid->set_arg_modified(arg, val);
483 }
484 
485 bool ciMethodData::is_arg_local(int i) const {
486   return is_set_nth_bit(_arg_local, i);
487 }
488 
489 bool ciMethodData::is_arg_stack(int i) const {
490   return is_set_nth_bit(_arg_stack, i);
491 }
492 
493 bool ciMethodData::is_arg_returned(int i) const {
494   return is_set_nth_bit(_arg_returned, i);
495 }
496 
497 uint ciMethodData::arg_modified(int arg) const {
498   ArgInfoData *aid = arg_info();
499   if (aid == NULL)
500     return 0;
501   assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number");
502   return aid->arg_modified(arg);
503 }
504 
505 ByteSize ciMethodData::offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data) {
506   // Get offset within MethodData* of the data array
507   ByteSize data_offset = MethodData::data_offset();
508 
509   // Get cell offset of the ProfileData within data array
510   int cell_offset = dp_to_di(data->dp());
511 
512   // Add in counter_offset, the # of bytes into the ProfileData of counter or flag
513   int offset = in_bytes(data_offset) + cell_offset + in_bytes(slot_offset_in_data);
514 
515   return in_ByteSize(offset);
516 }
517 
518 ciArgInfoData *ciMethodData::arg_info() const {
519   // Should be last, have to skip all traps.
520   DataLayout* dp  = extra_data_base();
521   DataLayout* end = args_data_limit();
522   for (; dp < end; dp = MethodData::next_extra(dp)) {
523     if (dp->tag() == DataLayout::arg_info_data_tag)
524       return new ciArgInfoData(dp);
525   }
526   return NULL;
527 }
528 
529 
530 // Implementation of the print method.
531 void ciMethodData::print_impl(outputStream* st) {
532   ciMetadata::print_impl(st);
533 }
534 
535 void ciMethodData::dump_replay_data_type_helper(outputStream* out, int round, int& count, ProfileData* pdata, ByteSize offset, ciKlass* k) {
536   if (k != NULL) {
537     if (round == 0) {
538       count++;
539     } else {
540       out->print(" %d %s", (int)(dp_to_di(pdata->dp() + in_bytes(offset)) / sizeof(intptr_t)), k->name()->as_quoted_ascii());
541     }
542   }
543 }
544 
545 template<class T> void ciMethodData::dump_replay_data_receiver_type_helper(outputStream* out, int round, int& count, T* vdata) {
546   for (uint i = 0; i < vdata->row_limit(); i++) {
547     dump_replay_data_type_helper(out, round, count, vdata, vdata->receiver_offset(i), vdata->receiver(i));
548   }
549 }
550 
551 template<class T> void ciMethodData::dump_replay_data_call_type_helper(outputStream* out, int round, int& count, T* call_type_data) {
552   if (call_type_data->has_arguments()) {
553     for (int i = 0; i < call_type_data->number_of_arguments(); i++) {
554       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));
555     }
556   }
557   if (call_type_data->has_return()) {
558     dump_replay_data_type_helper(out, round, count, call_type_data, call_type_data->return_type_offset(), call_type_data->valid_return_type());
559   }
560 }
561 
562 void ciMethodData::dump_replay_data_extra_data_helper(outputStream* out, int round, int& count) {
563   DataLayout* dp  = extra_data_base();
564   DataLayout* end = args_data_limit();
565 
566   for (;dp < end; dp = MethodData::next_extra(dp)) {
567     switch(dp->tag()) {
568     case DataLayout::no_tag:
569     case DataLayout::arg_info_data_tag:
570       return;
571     case DataLayout::bit_data_tag:
572       break;
573     case DataLayout::speculative_trap_data_tag: {
574       ciSpeculativeTrapData* data = new ciSpeculativeTrapData(dp);
575       ciMethod* m = data->method();
576       if (m != NULL) {
577         if (round == 0) {
578           count++;
579         } else {
580           out->print(" %d ", (int)(dp_to_di(((address)dp) + in_bytes(ciSpeculativeTrapData::method_offset())) / sizeof(intptr_t)));
581           m->dump_name_as_ascii(out);
582         }
583       }
584       break;
585     }
586     default:
587       fatal("bad tag = %d", dp->tag());
588     }
589   }
590 }
591 
592 void ciMethodData::dump_replay_data(outputStream* out) {
593   ResourceMark rm;
594   MethodData* mdo = get_MethodData();
595   Method* method = mdo->method();
596   Klass* holder = method->method_holder();
597   out->print("ciMethodData %s %s %s %d %d",
598              holder->name()->as_quoted_ascii(),
599              method->name()->as_quoted_ascii(),
600              method->signature()->as_quoted_ascii(),
601              _state,
602              current_mileage());
603 
604   // dump the contents of the MDO header as raw data
605   unsigned char* orig = (unsigned char*)&_orig;
606   int length = sizeof(_orig);
607   out->print(" orig %d", length);
608   for (int i = 0; i < length; i++) {
609     out->print(" %d", orig[i]);
610   }
611 
612   // dump the MDO data as raw data
613   int elements = (data_size() + extra_data_size()) / sizeof(intptr_t);
614   out->print(" data %d", elements);
615   for (int i = 0; i < elements; i++) {
616     // We could use INTPTR_FORMAT here but that's zero justified
617     // which makes comparing it with the SA version of this output
618     // harder. data()'s element type is intptr_t.
619     out->print(" " INTPTRNZ_FORMAT, data()[i]);
620   }
621 
622   // The MDO contained oop references as ciObjects, so scan for those
623   // and emit pairs of offset and klass name so that they can be
624   // reconstructed at runtime.  The first round counts the number of
625   // oop references and the second actually emits them.
626   ciParametersTypeData* parameters = parameters_type_data();
627   for (int count = 0, round = 0; round < 2; round++) {
628     if (round == 1) out->print(" oops %d", count);
629     ProfileData* pdata = first_data();
630     for ( ; is_valid(pdata); pdata = next_data(pdata)) {
631       if (pdata->is_VirtualCallData()) {
632         ciVirtualCallData* vdata = (ciVirtualCallData*)pdata;
633         dump_replay_data_receiver_type_helper<ciVirtualCallData>(out, round, count, vdata);
634         if (pdata->is_VirtualCallTypeData()) {
635           ciVirtualCallTypeData* call_type_data = (ciVirtualCallTypeData*)pdata;
636           dump_replay_data_call_type_helper<ciVirtualCallTypeData>(out, round, count, call_type_data);
637         }
638       } else if (pdata->is_ReceiverTypeData()) {
639         ciReceiverTypeData* vdata = (ciReceiverTypeData*)pdata;
640         dump_replay_data_receiver_type_helper<ciReceiverTypeData>(out, round, count, vdata);
641       } else if (pdata->is_CallTypeData()) {
642           ciCallTypeData* call_type_data = (ciCallTypeData*)pdata;
643           dump_replay_data_call_type_helper<ciCallTypeData>(out, round, count, call_type_data);
644       }
645     }
646     if (parameters != NULL) {
647       for (int i = 0; i < parameters->number_of_parameters(); i++) {
648         dump_replay_data_type_helper(out, round, count, parameters, ParametersTypeData::type_offset(i), parameters->valid_parameter_type(i));
649       }
650     }
651   }
652   for (int count = 0, round = 0; round < 2; round++) {
653     if (round == 1) out->print(" methods %d", count);
654     dump_replay_data_extra_data_helper(out, round, count);
655   }
656   out->cr();
657 }
658 
659 #ifndef PRODUCT
660 void ciMethodData::print() {
661   print_data_on(tty);
662 }
663 
664 void ciMethodData::print_data_on(outputStream* st) {
665   ResourceMark rm;
666   ciParametersTypeData* parameters = parameters_type_data();
667   if (parameters != NULL) {
668     parameters->print_data_on(st);
669   }
670   ciProfileData* data;
671   for (data = first_data(); is_valid(data); data = next_data(data)) {
672     st->print("%d", dp_to_di(data->dp()));
673     st->fill_to(6);
674     data->print_data_on(st);
675   }
676   st->print_cr("--- Extra data:");
677   DataLayout* dp  = extra_data_base();
678   DataLayout* end = args_data_limit();
679   for (;; dp = MethodData::next_extra(dp)) {
680     assert(dp < end, "moved past end of extra data");
681     switch (dp->tag()) {
682     case DataLayout::no_tag:
683       continue;
684     case DataLayout::bit_data_tag:
685       data = new BitData(dp);
686       break;
687     case DataLayout::arg_info_data_tag:
688       data = new ciArgInfoData(dp);
689       dp = end; // ArgInfoData is at the end of extra data section.
690       break;
691     case DataLayout::speculative_trap_data_tag:
692       data = new ciSpeculativeTrapData(dp);
693       break;
694     default:
695       fatal("unexpected tag %d", dp->tag());
696     }
697     st->print("%d", dp_to_di(data->dp()));
698     st->fill_to(6);
699     data->print_data_on(st);
700     if (dp >= end) return;
701   }
702 }
703 
704 void ciTypeEntries::print_ciklass(outputStream* st, intptr_t k) {
705   if (TypeEntries::is_type_none(k)) {
706     st->print("none");
707   } else if (TypeEntries::is_type_unknown(k)) {
708     st->print("unknown");
709   } else {
710     valid_ciklass(k)->print_name_on(st);
711   }
712   if (TypeEntries::was_null_seen(k)) {
713     st->print(" (null seen)");
714   }
715 }
716 
717 void ciTypeStackSlotEntries::print_data_on(outputStream* st) const {
718   for (int i = 0; i < number_of_entries(); i++) {
719     _pd->tab(st);
720     st->print("%d: stack (%u) ", i, stack_slot(i));
721     print_ciklass(st, type(i));
722     st->cr();
723   }
724 }
725 
726 void ciReturnTypeEntry::print_data_on(outputStream* st) const {
727   _pd->tab(st);
728   st->print("ret ");
729   print_ciklass(st, type());
730   st->cr();
731 }
732 
733 void ciCallTypeData::print_data_on(outputStream* st, const char* extra) const {
734   print_shared(st, "ciCallTypeData", extra);
735   if (has_arguments()) {
736     tab(st, true);
737     st->print_cr("argument types");
738     args()->print_data_on(st);
739   }
740   if (has_return()) {
741     tab(st, true);
742     st->print_cr("return type");
743     ret()->print_data_on(st);
744   }
745 }
746 
747 void ciReceiverTypeData::print_receiver_data_on(outputStream* st) const {
748   uint row;
749   int entries = 0;
750   for (row = 0; row < row_limit(); row++) {
751     if (receiver(row) != NULL)  entries++;
752   }
753   st->print_cr("count(%u) entries(%u)", count(), entries);
754   for (row = 0; row < row_limit(); row++) {
755     if (receiver(row) != NULL) {
756       tab(st);
757       receiver(row)->print_name_on(st);
758       st->print_cr("(%u)", receiver_count(row));
759     }
760   }
761 }
762 
763 void ciReceiverTypeData::print_data_on(outputStream* st, const char* extra) const {
764   print_shared(st, "ciReceiverTypeData", extra);
765   print_receiver_data_on(st);
766 }
767 
768 void ciVirtualCallData::print_data_on(outputStream* st, const char* extra) const {
769   print_shared(st, "ciVirtualCallData", extra);
770   rtd_super()->print_receiver_data_on(st);
771 }
772 
773 void ciVirtualCallTypeData::print_data_on(outputStream* st, const char* extra) const {
774   print_shared(st, "ciVirtualCallTypeData", extra);
775   rtd_super()->print_receiver_data_on(st);
776   if (has_arguments()) {
777     tab(st, true);
778     st->print("argument types");
779     args()->print_data_on(st);
780   }
781   if (has_return()) {
782     tab(st, true);
783     st->print("return type");
784     ret()->print_data_on(st);
785   }
786 }
787 
788 void ciParametersTypeData::print_data_on(outputStream* st, const char* extra) const {
789   st->print_cr("ciParametersTypeData");
790   parameters()->print_data_on(st);
791 }
792 
793 void ciSpeculativeTrapData::print_data_on(outputStream* st, const char* extra) const {
794   st->print_cr("ciSpeculativeTrapData");
795   tab(st);
796   method()->print_short_name(st);
797   st->cr();
798 }
799 #endif