rev 5462 : 8026251: New type profiling points: parameters to methods
Summary: x86 interpreter and c1 type profiling for parameters on method entries
Reviewed-by:

   1 /*
   2  * Copyright (c) 2000, 2013, 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 "classfile/systemDictionary.hpp"
  27 #include "interpreter/bytecode.hpp"
  28 #include "interpreter/bytecodeStream.hpp"
  29 #include "interpreter/linkResolver.hpp"
  30 #include "memory/heapInspection.hpp"
  31 #include "oops/methodData.hpp"
  32 #include "prims/jvmtiRedefineClasses.hpp"
  33 #include "runtime/compilationPolicy.hpp"
  34 #include "runtime/deoptimization.hpp"
  35 #include "runtime/handles.inline.hpp"
  36 
  37 // ==================================================================
  38 // DataLayout
  39 //
  40 // Overlay for generic profiling data.
  41 
  42 // Some types of data layouts need a length field.
  43 bool DataLayout::needs_array_len(u1 tag) {
  44   return (tag == multi_branch_data_tag) || (tag == arg_info_data_tag) || (tag == parameters_type_data_tag);
  45 }
  46 
  47 // Perform generic initialization of the data.  More specific
  48 // initialization occurs in overrides of ProfileData::post_initialize.
  49 void DataLayout::initialize(u1 tag, u2 bci, int cell_count) {
  50   _header._bits = (intptr_t)0;
  51   _header._struct._tag = tag;
  52   _header._struct._bci = bci;
  53   for (int i = 0; i < cell_count; i++) {
  54     set_cell_at(i, (intptr_t)0);
  55   }
  56   if (needs_array_len(tag)) {
  57     set_cell_at(ArrayData::array_len_off_set, cell_count - 1); // -1 for header.
  58   }
  59   if (tag == call_type_data_tag) {
  60     CallTypeData::initialize(this, cell_count);
  61   } else if (tag == virtual_call_type_data_tag) {
  62     VirtualCallTypeData::initialize(this, cell_count);
  63   }
  64 }
  65 
  66 void DataLayout::clean_weak_klass_links(BoolObjectClosure* cl) {
  67   ResourceMark m;
  68   data_in()->clean_weak_klass_links(cl);
  69 }
  70 
  71 
  72 // ==================================================================
  73 // ProfileData
  74 //
  75 // A ProfileData object is created to refer to a section of profiling
  76 // data in a structured way.
  77 
  78 // Constructor for invalid ProfileData.
  79 ProfileData::ProfileData() {
  80   _data = NULL;
  81 }
  82 
  83 #ifndef PRODUCT
  84 void ProfileData::print_shared(outputStream* st, const char* name) const {
  85   st->print("bci: %d", bci());
  86   st->fill_to(tab_width_one);
  87   st->print("%s", name);
  88   tab(st);
  89   int trap = trap_state();
  90   if (trap != 0) {
  91     char buf[100];
  92     st->print("trap(%s) ", Deoptimization::format_trap_state(buf, sizeof(buf), trap));
  93   }
  94   int flags = data()->flags();
  95   if (flags != 0)
  96     st->print("flags(%d) ", flags);
  97 }
  98 
  99 void ProfileData::tab(outputStream* st, bool first) const {
 100   st->fill_to(first ? tab_width_one : tab_width_two);
 101 }
 102 #endif // !PRODUCT
 103 
 104 // ==================================================================
 105 // BitData
 106 //
 107 // A BitData corresponds to a one-bit flag.  This is used to indicate
 108 // whether a checkcast bytecode has seen a null value.
 109 
 110 
 111 #ifndef PRODUCT
 112 void BitData::print_data_on(outputStream* st) const {
 113   print_shared(st, "BitData");
 114 }
 115 #endif // !PRODUCT
 116 
 117 // ==================================================================
 118 // CounterData
 119 //
 120 // A CounterData corresponds to a simple counter.
 121 
 122 #ifndef PRODUCT
 123 void CounterData::print_data_on(outputStream* st) const {
 124   print_shared(st, "CounterData");
 125   st->print_cr("count(%u)", count());
 126 }
 127 #endif // !PRODUCT
 128 
 129 // ==================================================================
 130 // JumpData
 131 //
 132 // A JumpData is used to access profiling information for a direct
 133 // branch.  It is a counter, used for counting the number of branches,
 134 // plus a data displacement, used for realigning the data pointer to
 135 // the corresponding target bci.
 136 
 137 void JumpData::post_initialize(BytecodeStream* stream, MethodData* mdo) {
 138   assert(stream->bci() == bci(), "wrong pos");
 139   int target;
 140   Bytecodes::Code c = stream->code();
 141   if (c == Bytecodes::_goto_w || c == Bytecodes::_jsr_w) {
 142     target = stream->dest_w();
 143   } else {
 144     target = stream->dest();
 145   }
 146   int my_di = mdo->dp_to_di(dp());
 147   int target_di = mdo->bci_to_di(target);
 148   int offset = target_di - my_di;
 149   set_displacement(offset);
 150 }
 151 
 152 #ifndef PRODUCT
 153 void JumpData::print_data_on(outputStream* st) const {
 154   print_shared(st, "JumpData");
 155   st->print_cr("taken(%u) displacement(%d)", taken(), displacement());
 156 }
 157 #endif // !PRODUCT
 158 
 159 int TypeStackSlotEntries::compute_cell_count(Symbol* signature, bool include_receiver, int max) {
 160   // Parameter profiling include the receiver
 161   int args_count = include_receiver ? 1 : 0;
 162   ResourceMark rm;
 163   SignatureStream ss(signature);
 164   args_count += ss.reference_parameter_count();
 165   args_count = MIN2(args_count, max);
 166   return args_count * per_arg_cell_count;
 167 }
 168 
 169 int TypeEntriesAtCall::compute_cell_count(BytecodeStream* stream) {
 170   assert(Bytecodes::is_invoke(stream->code()), "should be invoke");
 171   assert(TypeStackSlotEntries::per_arg_count() > ReturnTypeEntry::static_cell_count(), "code to test for arguments/results broken");
 172   Bytecode_invoke inv(stream->method(), stream->bci());
 173   int args_cell = 0;
 174   if (arguments_profiling_enabled()) {
 175     args_cell = TypeStackSlotEntries::compute_cell_count(inv.signature(), false, TypeProfileArgsLimit);
 176   }
 177   int ret_cell = 0;
 178   if (return_profiling_enabled() && (inv.result_type() == T_OBJECT || inv.result_type() == T_ARRAY)) {
 179     ret_cell = ReturnTypeEntry::static_cell_count();
 180   }
 181   int header_cell = 0;
 182   if (args_cell + ret_cell > 0) {
 183     header_cell = header_cell_count();
 184   }
 185 
 186   return header_cell + args_cell + ret_cell;
 187 }
 188 
 189 class ArgumentOffsetComputer : public SignatureInfo {
 190 private:
 191   int _max;
 192   GrowableArray<int> _offsets;
 193 
 194   void set(int size, BasicType type) { _size += size; }
 195   void do_object(int begin, int end) {
 196     if (_offsets.length() < _max) {
 197       _offsets.push(_size);
 198     }
 199     SignatureInfo::do_object(begin, end);
 200   }
 201   void do_array (int begin, int end) {
 202     if (_offsets.length() < _max) {
 203       _offsets.push(_size);
 204     }
 205     SignatureInfo::do_array(begin, end);
 206   }
 207 
 208 public:
 209   ArgumentOffsetComputer(Symbol* signature, int max)
 210     : SignatureInfo(signature), _max(max), _offsets(Thread::current(), max) {
 211   }
 212 
 213   int total() { lazy_iterate_parameters(); return _size; }
 214 
 215   int off_at(int i) const { return _offsets.at(i); }
 216 };
 217 
 218 void TypeStackSlotEntries::post_initialize(Symbol* signature, bool has_receiver, bool include_receiver) {
 219   ResourceMark rm;
 220   int start = 0;
 221   // Parameter profiling include the receiver
 222   if (include_receiver && has_receiver) {
 223     set_stack_slot(0, 0);
 224     set_type(0, type_none());
 225     start += 1;
 226   }
 227   ArgumentOffsetComputer aos(signature, _number_of_entries-start);
 228   aos.total();
 229   for (int i = start; i < _number_of_entries; i++) {
 230     set_stack_slot(i, aos.off_at(i-start) + (has_receiver ? 1 : 0));
 231     set_type(i, type_none());
 232   }
 233 }
 234 
 235 void CallTypeData::post_initialize(BytecodeStream* stream, MethodData* mdo) {
 236   assert(Bytecodes::is_invoke(stream->code()), "should be invoke");
 237   Bytecode_invoke inv(stream->method(), stream->bci());
 238 
 239   SignatureStream ss(inv.signature());
 240   if (has_arguments()) {
 241 #ifdef ASSERT
 242     ResourceMark rm;
 243     int count = MIN2(ss.reference_parameter_count(), (int)TypeProfileArgsLimit);
 244     assert(count > 0, "room for args type but none found?");
 245     check_number_of_arguments(count);
 246 #endif
 247     _args.post_initialize(inv.signature(), inv.has_receiver(), false);
 248   }
 249 
 250   if (has_return()) {
 251     assert(inv.result_type() == T_OBJECT || inv.result_type() == T_ARRAY, "room for a ret type but doesn't return obj?");
 252     _ret.post_initialize();
 253   }
 254 }
 255 
 256 void VirtualCallTypeData::post_initialize(BytecodeStream* stream, MethodData* mdo) {
 257   assert(Bytecodes::is_invoke(stream->code()), "should be invoke");
 258   Bytecode_invoke inv(stream->method(), stream->bci());
 259 
 260   if (has_arguments()) {
 261 #ifdef ASSERT
 262     ResourceMark rm;
 263     SignatureStream ss(inv.signature());
 264     int count = MIN2(ss.reference_parameter_count(), (int)TypeProfileArgsLimit);
 265     assert(count > 0, "room for args type but none found?");
 266     check_number_of_arguments(count);
 267 #endif
 268     _args.post_initialize(inv.signature(), inv.has_receiver(), false);
 269   }
 270 
 271   if (has_return()) {
 272     assert(inv.result_type() == T_OBJECT || inv.result_type() == T_ARRAY, "room for a ret type but doesn't return obj?");
 273     _ret.post_initialize();
 274   }
 275 }
 276 
 277 bool TypeEntries::is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p) {
 278   return !is_type_none(p) &&
 279     !((Klass*)klass_part(p))->is_loader_alive(is_alive_cl);
 280 }
 281 
 282 void TypeStackSlotEntries::clean_weak_klass_links(BoolObjectClosure* is_alive_cl) {
 283   for (int i = 0; i < _number_of_entries; i++) {
 284     intptr_t p = type(i);
 285     if (is_loader_alive(is_alive_cl, p)) {
 286       set_type(i, type_none());
 287     }
 288   }
 289 }
 290 
 291 void ReturnTypeEntry::clean_weak_klass_links(BoolObjectClosure* is_alive_cl) {
 292   intptr_t p = type();
 293   if (is_loader_alive(is_alive_cl, p)) {
 294     set_type(type_none());
 295   }
 296 }
 297 
 298 bool TypeEntriesAtCall::return_profiling_enabled() {
 299   return MethodData::profile_return();
 300 }
 301 
 302 bool TypeEntriesAtCall::arguments_profiling_enabled() {
 303   return MethodData::profile_arguments();
 304 }
 305 
 306 #ifndef PRODUCT
 307 void TypeEntries::print_klass(outputStream* st, intptr_t k) {
 308   if (is_type_none(k)) {
 309     st->print("none");
 310   } else if (is_type_unknown(k)) {
 311     st->print("unknown");
 312   } else {
 313     valid_klass(k)->print_value_on(st);
 314   }
 315   if (was_null_seen(k)) {
 316     st->print(" (null seen)");
 317   }
 318 }
 319 
 320 void TypeStackSlotEntries::print_data_on(outputStream* st) const {
 321   for (int i = 0; i < _number_of_entries; i++) {
 322     _pd->tab(st);
 323     st->print("%d: stack(%u) ", i, stack_slot(i));
 324     print_klass(st, type(i));
 325     st->cr();
 326   }
 327 }
 328 
 329 void ReturnTypeEntry::print_data_on(outputStream* st) const {
 330   _pd->tab(st);
 331   print_klass(st, type());
 332   st->cr();
 333 }
 334 
 335 void CallTypeData::print_data_on(outputStream* st) const {
 336   CounterData::print_data_on(st);
 337   if (has_arguments()) {
 338     tab(st, true);
 339     st->print("argument types");
 340     _args.print_data_on(st);
 341   }
 342   if (has_return()) {
 343     tab(st, true);
 344     st->print("return type");
 345     _ret.print_data_on(st);
 346   }
 347 }
 348 
 349 void VirtualCallTypeData::print_data_on(outputStream* st) const {
 350   VirtualCallData::print_data_on(st);
 351   if (has_arguments()) {
 352     tab(st, true);
 353     st->print("argument types");
 354     _args.print_data_on(st);
 355   }
 356   if (has_return()) {
 357     tab(st, true);
 358     st->print("return type");
 359     _ret.print_data_on(st);
 360   }
 361 }
 362 #endif
 363 
 364 // ==================================================================
 365 // ReceiverTypeData
 366 //
 367 // A ReceiverTypeData is used to access profiling information about a
 368 // dynamic type check.  It consists of a counter which counts the total times
 369 // that the check is reached, and a series of (Klass*, count) pairs
 370 // which are used to store a type profile for the receiver of the check.
 371 
 372 void ReceiverTypeData::clean_weak_klass_links(BoolObjectClosure* is_alive_cl) {
 373     for (uint row = 0; row < row_limit(); row++) {
 374     Klass* p = receiver(row);
 375     if (p != NULL && !p->is_loader_alive(is_alive_cl)) {
 376       clear_row(row);
 377     }
 378   }
 379 }
 380 
 381 #ifndef PRODUCT
 382 void ReceiverTypeData::print_receiver_data_on(outputStream* st) const {
 383   uint row;
 384   int entries = 0;
 385   for (row = 0; row < row_limit(); row++) {
 386     if (receiver(row) != NULL)  entries++;
 387   }
 388   st->print_cr("count(%u) entries(%u)", count(), entries);
 389   int total = count();
 390   for (row = 0; row < row_limit(); row++) {
 391     if (receiver(row) != NULL) {
 392       total += receiver_count(row);
 393     }
 394   }
 395   for (row = 0; row < row_limit(); row++) {
 396     if (receiver(row) != NULL) {
 397       tab(st);
 398       receiver(row)->print_value_on(st);
 399       st->print_cr("(%u %4.2f)", receiver_count(row), (float) receiver_count(row) / (float) total);
 400     }
 401   }
 402 }
 403 void ReceiverTypeData::print_data_on(outputStream* st) const {
 404   print_shared(st, "ReceiverTypeData");
 405   print_receiver_data_on(st);
 406 }
 407 void VirtualCallData::print_data_on(outputStream* st) const {
 408   print_shared(st, "VirtualCallData");
 409   print_receiver_data_on(st);
 410 }
 411 #endif // !PRODUCT
 412 
 413 // ==================================================================
 414 // RetData
 415 //
 416 // A RetData is used to access profiling information for a ret bytecode.
 417 // It is composed of a count of the number of times that the ret has
 418 // been executed, followed by a series of triples of the form
 419 // (bci, count, di) which count the number of times that some bci was the
 420 // target of the ret and cache a corresponding displacement.
 421 
 422 void RetData::post_initialize(BytecodeStream* stream, MethodData* mdo) {
 423   for (uint row = 0; row < row_limit(); row++) {
 424     set_bci_displacement(row, -1);
 425     set_bci(row, no_bci);
 426   }
 427   // release so other threads see a consistent state.  bci is used as
 428   // a valid flag for bci_displacement.
 429   OrderAccess::release();
 430 }
 431 
 432 // This routine needs to atomically update the RetData structure, so the
 433 // caller needs to hold the RetData_lock before it gets here.  Since taking
 434 // the lock can block (and allow GC) and since RetData is a ProfileData is a
 435 // wrapper around a derived oop, taking the lock in _this_ method will
 436 // basically cause the 'this' pointer's _data field to contain junk after the
 437 // lock.  We require the caller to take the lock before making the ProfileData
 438 // structure.  Currently the only caller is InterpreterRuntime::update_mdp_for_ret
 439 address RetData::fixup_ret(int return_bci, MethodData* h_mdo) {
 440   // First find the mdp which corresponds to the return bci.
 441   address mdp = h_mdo->bci_to_dp(return_bci);
 442 
 443   // Now check to see if any of the cache slots are open.
 444   for (uint row = 0; row < row_limit(); row++) {
 445     if (bci(row) == no_bci) {
 446       set_bci_displacement(row, mdp - dp());
 447       set_bci_count(row, DataLayout::counter_increment);
 448       // Barrier to ensure displacement is written before the bci; allows
 449       // the interpreter to read displacement without fear of race condition.
 450       release_set_bci(row, return_bci);
 451       break;
 452     }
 453   }
 454   return mdp;
 455 }
 456 
 457 
 458 #ifndef PRODUCT
 459 void RetData::print_data_on(outputStream* st) const {
 460   print_shared(st, "RetData");
 461   uint row;
 462   int entries = 0;
 463   for (row = 0; row < row_limit(); row++) {
 464     if (bci(row) != no_bci)  entries++;
 465   }
 466   st->print_cr("count(%u) entries(%u)", count(), entries);
 467   for (row = 0; row < row_limit(); row++) {
 468     if (bci(row) != no_bci) {
 469       tab(st);
 470       st->print_cr("bci(%d: count(%u) displacement(%d))",
 471                    bci(row), bci_count(row), bci_displacement(row));
 472     }
 473   }
 474 }
 475 #endif // !PRODUCT
 476 
 477 // ==================================================================
 478 // BranchData
 479 //
 480 // A BranchData is used to access profiling data for a two-way branch.
 481 // It consists of taken and not_taken counts as well as a data displacement
 482 // for the taken case.
 483 
 484 void BranchData::post_initialize(BytecodeStream* stream, MethodData* mdo) {
 485   assert(stream->bci() == bci(), "wrong pos");
 486   int target = stream->dest();
 487   int my_di = mdo->dp_to_di(dp());
 488   int target_di = mdo->bci_to_di(target);
 489   int offset = target_di - my_di;
 490   set_displacement(offset);
 491 }
 492 
 493 #ifndef PRODUCT
 494 void BranchData::print_data_on(outputStream* st) const {
 495   print_shared(st, "BranchData");
 496   st->print_cr("taken(%u) displacement(%d)",
 497                taken(), displacement());
 498   tab(st);
 499   st->print_cr("not taken(%u)", not_taken());
 500 }
 501 #endif
 502 
 503 // ==================================================================
 504 // MultiBranchData
 505 //
 506 // A MultiBranchData is used to access profiling information for
 507 // a multi-way branch (*switch bytecodes).  It consists of a series
 508 // of (count, displacement) pairs, which count the number of times each
 509 // case was taken and specify the data displacment for each branch target.
 510 
 511 int MultiBranchData::compute_cell_count(BytecodeStream* stream) {
 512   int cell_count = 0;
 513   if (stream->code() == Bytecodes::_tableswitch) {
 514     Bytecode_tableswitch sw(stream->method()(), stream->bcp());
 515     cell_count = 1 + per_case_cell_count * (1 + sw.length()); // 1 for default
 516   } else {
 517     Bytecode_lookupswitch sw(stream->method()(), stream->bcp());
 518     cell_count = 1 + per_case_cell_count * (sw.number_of_pairs() + 1); // 1 for default
 519   }
 520   return cell_count;
 521 }
 522 
 523 void MultiBranchData::post_initialize(BytecodeStream* stream,
 524                                       MethodData* mdo) {
 525   assert(stream->bci() == bci(), "wrong pos");
 526   int target;
 527   int my_di;
 528   int target_di;
 529   int offset;
 530   if (stream->code() == Bytecodes::_tableswitch) {
 531     Bytecode_tableswitch sw(stream->method()(), stream->bcp());
 532     int len = sw.length();
 533     assert(array_len() == per_case_cell_count * (len + 1), "wrong len");
 534     for (int count = 0; count < len; count++) {
 535       target = sw.dest_offset_at(count) + bci();
 536       my_di = mdo->dp_to_di(dp());
 537       target_di = mdo->bci_to_di(target);
 538       offset = target_di - my_di;
 539       set_displacement_at(count, offset);
 540     }
 541     target = sw.default_offset() + bci();
 542     my_di = mdo->dp_to_di(dp());
 543     target_di = mdo->bci_to_di(target);
 544     offset = target_di - my_di;
 545     set_default_displacement(offset);
 546 
 547   } else {
 548     Bytecode_lookupswitch sw(stream->method()(), stream->bcp());
 549     int npairs = sw.number_of_pairs();
 550     assert(array_len() == per_case_cell_count * (npairs + 1), "wrong len");
 551     for (int count = 0; count < npairs; count++) {
 552       LookupswitchPair pair = sw.pair_at(count);
 553       target = pair.offset() + bci();
 554       my_di = mdo->dp_to_di(dp());
 555       target_di = mdo->bci_to_di(target);
 556       offset = target_di - my_di;
 557       set_displacement_at(count, offset);
 558     }
 559     target = sw.default_offset() + bci();
 560     my_di = mdo->dp_to_di(dp());
 561     target_di = mdo->bci_to_di(target);
 562     offset = target_di - my_di;
 563     set_default_displacement(offset);
 564   }
 565 }
 566 
 567 #ifndef PRODUCT
 568 void MultiBranchData::print_data_on(outputStream* st) const {
 569   print_shared(st, "MultiBranchData");
 570   st->print_cr("default_count(%u) displacement(%d)",
 571                default_count(), default_displacement());
 572   int cases = number_of_cases();
 573   for (int i = 0; i < cases; i++) {
 574     tab(st);
 575     st->print_cr("count(%u) displacement(%d)",
 576                  count_at(i), displacement_at(i));
 577   }
 578 }
 579 #endif
 580 
 581 #ifndef PRODUCT
 582 void ArgInfoData::print_data_on(outputStream* st) const {
 583   print_shared(st, "ArgInfoData");
 584   int nargs = number_of_args();
 585   for (int i = 0; i < nargs; i++) {
 586     st->print("  0x%x", arg_modified(i));
 587   }
 588   st->cr();
 589 }
 590 
 591 #endif
 592 
 593 int ParametersTypeData::compute_cell_count(Method* m) {
 594   if (!MethodData::profile_parameters_for_method(m)) {
 595     return 0;
 596   }
 597   int max = TypeProfileParmsLimit == -1 ? INT_MAX : TypeProfileParmsLimit;
 598   int obj_args = TypeStackSlotEntries::compute_cell_count(m->signature(), !m->is_static(), max);
 599   if (obj_args > 0) {
 600     return obj_args + 1; // 1 cell for array len
 601   }
 602   return 0;
 603 }
 604 
 605 void ParametersTypeData::post_initialize(BytecodeStream* stream, MethodData* mdo) {
 606   _parameters.post_initialize(mdo->method()->signature(), !mdo->method()->is_static(), true);
 607 }
 608 
 609 bool ParametersTypeData::profiling_enabled() {
 610   return MethodData::profile_parameters();
 611 }
 612 
 613 #ifndef PRODUCT
 614 void ParametersTypeData::print_data_on(outputStream* st) const {
 615   st->print("parameter types");
 616   _parameters.print_data_on(st);
 617 }
 618 #endif
 619 
 620 // ==================================================================
 621 // MethodData*
 622 //
 623 // A MethodData* holds information which has been collected about
 624 // a method.
 625 
 626 MethodData* MethodData::allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS) {
 627   int size = MethodData::compute_allocation_size_in_words(method);
 628 
 629   return new (loader_data, size, false, MetaspaceObj::MethodDataType, THREAD)
 630     MethodData(method(), size, CHECK_NULL);
 631 }
 632 
 633 int MethodData::bytecode_cell_count(Bytecodes::Code code) {
 634 #if defined(COMPILER1) && !defined(COMPILER2)
 635   return no_profile_data;
 636 #else
 637   switch (code) {
 638   case Bytecodes::_checkcast:
 639   case Bytecodes::_instanceof:
 640   case Bytecodes::_aastore:
 641     if (TypeProfileCasts) {
 642       return ReceiverTypeData::static_cell_count();
 643     } else {
 644       return BitData::static_cell_count();
 645     }
 646   case Bytecodes::_invokespecial:
 647   case Bytecodes::_invokestatic:
 648     if (MethodData::profile_arguments() || MethodData::profile_return()) {
 649       return variable_cell_count;
 650     } else {
 651       return CounterData::static_cell_count();
 652     }
 653   case Bytecodes::_goto:
 654   case Bytecodes::_goto_w:
 655   case Bytecodes::_jsr:
 656   case Bytecodes::_jsr_w:
 657     return JumpData::static_cell_count();
 658   case Bytecodes::_invokevirtual:
 659   case Bytecodes::_invokeinterface:
 660     if (MethodData::profile_arguments() || MethodData::profile_return()) {
 661       return variable_cell_count;
 662     } else {
 663       return VirtualCallData::static_cell_count();
 664     }
 665   case Bytecodes::_invokedynamic:
 666     if (MethodData::profile_arguments() || MethodData::profile_return()) {
 667       return variable_cell_count;
 668     } else {
 669       return CounterData::static_cell_count();
 670     }
 671   case Bytecodes::_ret:
 672     return RetData::static_cell_count();
 673   case Bytecodes::_ifeq:
 674   case Bytecodes::_ifne:
 675   case Bytecodes::_iflt:
 676   case Bytecodes::_ifge:
 677   case Bytecodes::_ifgt:
 678   case Bytecodes::_ifle:
 679   case Bytecodes::_if_icmpeq:
 680   case Bytecodes::_if_icmpne:
 681   case Bytecodes::_if_icmplt:
 682   case Bytecodes::_if_icmpge:
 683   case Bytecodes::_if_icmpgt:
 684   case Bytecodes::_if_icmple:
 685   case Bytecodes::_if_acmpeq:
 686   case Bytecodes::_if_acmpne:
 687   case Bytecodes::_ifnull:
 688   case Bytecodes::_ifnonnull:
 689     return BranchData::static_cell_count();
 690   case Bytecodes::_lookupswitch:
 691   case Bytecodes::_tableswitch:
 692     return variable_cell_count;
 693   }
 694   return no_profile_data;
 695 #endif
 696 }
 697 
 698 // Compute the size of the profiling information corresponding to
 699 // the current bytecode.
 700 int MethodData::compute_data_size(BytecodeStream* stream) {
 701   int cell_count = bytecode_cell_count(stream->code());
 702   if (cell_count == no_profile_data) {
 703     return 0;
 704   }
 705   if (cell_count == variable_cell_count) {
 706     switch (stream->code()) {
 707     case Bytecodes::_lookupswitch:
 708     case Bytecodes::_tableswitch:
 709       cell_count = MultiBranchData::compute_cell_count(stream);
 710       break;
 711     case Bytecodes::_invokespecial:
 712     case Bytecodes::_invokestatic:
 713     case Bytecodes::_invokedynamic:
 714       assert(MethodData::profile_arguments() || MethodData::profile_return(), "should be collecting args profile");
 715       if (profile_arguments_for_invoke(stream->method(), stream->bci()) ||
 716           profile_return_for_invoke(stream->method(), stream->bci())) {
 717         cell_count = CallTypeData::compute_cell_count(stream);
 718       } else {
 719         cell_count = CounterData::static_cell_count();
 720       }
 721       break;
 722     case Bytecodes::_invokevirtual:
 723     case Bytecodes::_invokeinterface: {
 724       assert(MethodData::profile_arguments() || MethodData::profile_return(), "should be collecting args profile");
 725       if (profile_arguments_for_invoke(stream->method(), stream->bci()) ||
 726           profile_return_for_invoke(stream->method(), stream->bci())) {
 727         cell_count = VirtualCallTypeData::compute_cell_count(stream);
 728       } else {
 729         cell_count = VirtualCallData::static_cell_count();
 730       }
 731       break;
 732     }
 733     default:
 734       fatal("unexpected bytecode for var length profile data");
 735     }
 736   }
 737   // Note:  cell_count might be zero, meaning that there is just
 738   //        a DataLayout header, with no extra cells.
 739   assert(cell_count >= 0, "sanity");
 740   return DataLayout::compute_size_in_bytes(cell_count);
 741 }
 742 
 743 int MethodData::compute_extra_data_count(int data_size, int empty_bc_count) {
 744   if (ProfileTraps) {
 745     // Assume that up to 3% of BCIs with no MDP will need to allocate one.
 746     int extra_data_count = (uint)(empty_bc_count * 3) / 128 + 1;
 747     // If the method is large, let the extra BCIs grow numerous (to ~1%).
 748     int one_percent_of_data
 749       = (uint)data_size / (DataLayout::header_size_in_bytes()*128);
 750     if (extra_data_count < one_percent_of_data)
 751       extra_data_count = one_percent_of_data;
 752     if (extra_data_count > empty_bc_count)
 753       extra_data_count = empty_bc_count;  // no need for more
 754     return extra_data_count;
 755   } else {
 756     return 0;
 757   }
 758 }
 759 
 760 // Compute the size of the MethodData* necessary to store
 761 // profiling information about a given method.  Size is in bytes.
 762 int MethodData::compute_allocation_size_in_bytes(methodHandle method) {
 763   int data_size = 0;
 764   BytecodeStream stream(method);
 765   Bytecodes::Code c;
 766   int empty_bc_count = 0;  // number of bytecodes lacking data
 767   while ((c = stream.next()) >= 0) {
 768     int size_in_bytes = compute_data_size(&stream);
 769     data_size += size_in_bytes;
 770     if (size_in_bytes == 0)  empty_bc_count += 1;
 771   }
 772   int object_size = in_bytes(data_offset()) + data_size;
 773 
 774   // Add some extra DataLayout cells (at least one) to track stray traps.
 775   int extra_data_count = compute_extra_data_count(data_size, empty_bc_count);
 776   object_size += extra_data_count * DataLayout::compute_size_in_bytes(0);
 777 
 778   // Add a cell to record information about modified arguments.
 779   int arg_size = method->size_of_parameters();
 780   object_size += DataLayout::compute_size_in_bytes(arg_size+1);
 781 
 782   // Reserve room for an area of the MDO dedicated to profiling of
 783   // parameters
 784   int args_cell = ParametersTypeData::compute_cell_count(method());
 785   if (args_cell > 0) {
 786     object_size += DataLayout::compute_size_in_bytes(args_cell);
 787   }
 788   return object_size;
 789 }
 790 
 791 // Compute the size of the MethodData* necessary to store
 792 // profiling information about a given method.  Size is in words
 793 int MethodData::compute_allocation_size_in_words(methodHandle method) {
 794   int byte_size = compute_allocation_size_in_bytes(method);
 795   int word_size = align_size_up(byte_size, BytesPerWord) / BytesPerWord;
 796   return align_object_size(word_size);
 797 }
 798 
 799 // Initialize an individual data segment.  Returns the size of
 800 // the segment in bytes.
 801 int MethodData::initialize_data(BytecodeStream* stream,
 802                                        int data_index) {
 803 #if defined(COMPILER1) && !defined(COMPILER2)
 804   return 0;
 805 #else
 806   int cell_count = -1;
 807   int tag = DataLayout::no_tag;
 808   DataLayout* data_layout = data_layout_at(data_index);
 809   Bytecodes::Code c = stream->code();
 810   switch (c) {
 811   case Bytecodes::_checkcast:
 812   case Bytecodes::_instanceof:
 813   case Bytecodes::_aastore:
 814     if (TypeProfileCasts) {
 815       cell_count = ReceiverTypeData::static_cell_count();
 816       tag = DataLayout::receiver_type_data_tag;
 817     } else {
 818       cell_count = BitData::static_cell_count();
 819       tag = DataLayout::bit_data_tag;
 820     }
 821     break;
 822   case Bytecodes::_invokespecial:
 823   case Bytecodes::_invokestatic: {
 824     int counter_data_cell_count = CounterData::static_cell_count();
 825     if (profile_arguments_for_invoke(stream->method(), stream->bci()) ||
 826         profile_return_for_invoke(stream->method(), stream->bci())) {
 827       cell_count = CallTypeData::compute_cell_count(stream);
 828     } else {
 829       cell_count = counter_data_cell_count;
 830     }
 831     if (cell_count > counter_data_cell_count) {
 832       tag = DataLayout::call_type_data_tag;
 833     } else {
 834       tag = DataLayout::counter_data_tag;
 835     }
 836     break;
 837   }
 838   case Bytecodes::_goto:
 839   case Bytecodes::_goto_w:
 840   case Bytecodes::_jsr:
 841   case Bytecodes::_jsr_w:
 842     cell_count = JumpData::static_cell_count();
 843     tag = DataLayout::jump_data_tag;
 844     break;
 845   case Bytecodes::_invokevirtual:
 846   case Bytecodes::_invokeinterface: {
 847     int virtual_call_data_cell_count = VirtualCallData::static_cell_count();
 848     if (profile_arguments_for_invoke(stream->method(), stream->bci()) ||
 849         profile_return_for_invoke(stream->method(), stream->bci())) {
 850       cell_count = VirtualCallTypeData::compute_cell_count(stream);
 851     } else {
 852       cell_count = virtual_call_data_cell_count;
 853     }
 854     if (cell_count > virtual_call_data_cell_count) {
 855       tag = DataLayout::virtual_call_type_data_tag;
 856     } else {
 857       tag = DataLayout::virtual_call_data_tag;
 858     }
 859     break;
 860   }
 861   case Bytecodes::_invokedynamic: {
 862     // %%% should make a type profile for any invokedynamic that takes a ref argument
 863     int counter_data_cell_count = CounterData::static_cell_count();
 864     if (profile_arguments_for_invoke(stream->method(), stream->bci()) ||
 865         profile_return_for_invoke(stream->method(), stream->bci())) {
 866       cell_count = CallTypeData::compute_cell_count(stream);
 867     } else {
 868       cell_count = counter_data_cell_count;
 869     }
 870     if (cell_count > counter_data_cell_count) {
 871       tag = DataLayout::call_type_data_tag;
 872     } else {
 873       tag = DataLayout::counter_data_tag;
 874     }
 875     break;
 876   }
 877   case Bytecodes::_ret:
 878     cell_count = RetData::static_cell_count();
 879     tag = DataLayout::ret_data_tag;
 880     break;
 881   case Bytecodes::_ifeq:
 882   case Bytecodes::_ifne:
 883   case Bytecodes::_iflt:
 884   case Bytecodes::_ifge:
 885   case Bytecodes::_ifgt:
 886   case Bytecodes::_ifle:
 887   case Bytecodes::_if_icmpeq:
 888   case Bytecodes::_if_icmpne:
 889   case Bytecodes::_if_icmplt:
 890   case Bytecodes::_if_icmpge:
 891   case Bytecodes::_if_icmpgt:
 892   case Bytecodes::_if_icmple:
 893   case Bytecodes::_if_acmpeq:
 894   case Bytecodes::_if_acmpne:
 895   case Bytecodes::_ifnull:
 896   case Bytecodes::_ifnonnull:
 897     cell_count = BranchData::static_cell_count();
 898     tag = DataLayout::branch_data_tag;
 899     break;
 900   case Bytecodes::_lookupswitch:
 901   case Bytecodes::_tableswitch:
 902     cell_count = MultiBranchData::compute_cell_count(stream);
 903     tag = DataLayout::multi_branch_data_tag;
 904     break;
 905   }
 906   assert(tag == DataLayout::multi_branch_data_tag ||
 907          ((MethodData::profile_arguments() || MethodData::profile_return()) &&
 908           (tag == DataLayout::call_type_data_tag ||
 909            tag == DataLayout::counter_data_tag ||
 910            tag == DataLayout::virtual_call_type_data_tag ||
 911            tag == DataLayout::virtual_call_data_tag)) ||
 912          cell_count == bytecode_cell_count(c), "cell counts must agree");
 913   if (cell_count >= 0) {
 914     assert(tag != DataLayout::no_tag, "bad tag");
 915     assert(bytecode_has_profile(c), "agree w/ BHP");
 916     data_layout->initialize(tag, stream->bci(), cell_count);
 917     return DataLayout::compute_size_in_bytes(cell_count);
 918   } else {
 919     assert(!bytecode_has_profile(c), "agree w/ !BHP");
 920     return 0;
 921   }
 922 #endif
 923 }
 924 
 925 // Get the data at an arbitrary (sort of) data index.
 926 ProfileData* MethodData::data_at(int data_index) const {
 927   if (out_of_bounds(data_index)) {
 928     return NULL;
 929   }
 930   DataLayout* data_layout = data_layout_at(data_index);
 931   return data_layout->data_in();
 932 }
 933 
 934 ProfileData* DataLayout::data_in() {
 935   switch (tag()) {
 936   case DataLayout::no_tag:
 937   default:
 938     ShouldNotReachHere();
 939     return NULL;
 940   case DataLayout::bit_data_tag:
 941     return new BitData(this);
 942   case DataLayout::counter_data_tag:
 943     return new CounterData(this);
 944   case DataLayout::jump_data_tag:
 945     return new JumpData(this);
 946   case DataLayout::receiver_type_data_tag:
 947     return new ReceiverTypeData(this);
 948   case DataLayout::virtual_call_data_tag:
 949     return new VirtualCallData(this);
 950   case DataLayout::ret_data_tag:
 951     return new RetData(this);
 952   case DataLayout::branch_data_tag:
 953     return new BranchData(this);
 954   case DataLayout::multi_branch_data_tag:
 955     return new MultiBranchData(this);
 956   case DataLayout::arg_info_data_tag:
 957     return new ArgInfoData(this);
 958   case DataLayout::call_type_data_tag:
 959     return new CallTypeData(this);
 960   case DataLayout::virtual_call_type_data_tag:
 961     return new VirtualCallTypeData(this);
 962   case DataLayout::parameters_type_data_tag:
 963     return new ParametersTypeData(this);
 964   };
 965 }
 966 
 967 // Iteration over data.
 968 ProfileData* MethodData::next_data(ProfileData* current) const {
 969   int current_index = dp_to_di(current->dp());
 970   int next_index = current_index + current->size_in_bytes();
 971   ProfileData* next = data_at(next_index);
 972   return next;
 973 }
 974 
 975 // Give each of the data entries a chance to perform specific
 976 // data initialization.
 977 void MethodData::post_initialize(BytecodeStream* stream) {
 978   ResourceMark rm;
 979   ProfileData* data;
 980   for (data = first_data(); is_valid(data); data = next_data(data)) {
 981     stream->set_start(data->bci());
 982     stream->next();
 983     data->post_initialize(stream, this);
 984   }
 985   if (_parameters_type_data_di != -1) {
 986     parameters_type_data()->post_initialize(NULL, this);
 987   }
 988 }
 989 
 990 // Initialize the MethodData* corresponding to a given method.
 991 MethodData::MethodData(methodHandle method, int size, TRAPS) {
 992   No_Safepoint_Verifier no_safepoint;  // init function atomic wrt GC
 993   ResourceMark rm;
 994   // Set the method back-pointer.
 995   _method = method();
 996 
 997   init();
 998   set_creation_mileage(mileage_of(method()));
 999 
1000   // Go through the bytecodes and allocate and initialize the
1001   // corresponding data cells.
1002   int data_size = 0;
1003   int empty_bc_count = 0;  // number of bytecodes lacking data
1004   _data[0] = 0;  // apparently not set below.
1005   BytecodeStream stream(method);
1006   Bytecodes::Code c;
1007   while ((c = stream.next()) >= 0) {
1008     int size_in_bytes = initialize_data(&stream, data_size);
1009     data_size += size_in_bytes;
1010     if (size_in_bytes == 0)  empty_bc_count += 1;
1011   }
1012   _data_size = data_size;
1013   int object_size = in_bytes(data_offset()) + data_size;
1014 
1015   // Add some extra DataLayout cells (at least one) to track stray traps.
1016   int extra_data_count = compute_extra_data_count(data_size, empty_bc_count);
1017   int extra_size = extra_data_count * DataLayout::compute_size_in_bytes(0);
1018 
1019   // Add a cell to record information about modified arguments.
1020   // Set up _args_modified array after traps cells so that
1021   // the code for traps cells works.
1022   DataLayout *dp = data_layout_at(data_size + extra_size);
1023 
1024   int arg_size = method->size_of_parameters();
1025   dp->initialize(DataLayout::arg_info_data_tag, 0, arg_size+1);
1026 
1027   int arg_data_size = DataLayout::compute_size_in_bytes(arg_size+1);
1028   object_size += extra_size + arg_data_size;
1029 
1030   int args_cell = ParametersTypeData::compute_cell_count(method());
1031   // If we are profiling parameters, we reserver an area near the end
1032   // of the MDO after the slots for bytecodes (because there's no bci
1033   // for method entry so they don't fit with the framework for the
1034   // profiling of bytecodes). We store the offset within the MDO of
1035   // this area (or -1 if no parameter is profiled)
1036   if (args_cell > 0) {
1037     object_size += DataLayout::compute_size_in_bytes(args_cell);
1038     _parameters_type_data_di = data_size + extra_size + arg_data_size;
1039     DataLayout *dp = data_layout_at(data_size + extra_size + arg_data_size);
1040     dp->initialize(DataLayout::parameters_type_data_tag, 0, args_cell);
1041   } else {
1042     _parameters_type_data_di = -1;
1043   }
1044 
1045   // Set an initial hint. Don't use set_hint_di() because
1046   // first_di() may be out of bounds if data_size is 0.
1047   // In that situation, _hint_di is never used, but at
1048   // least well-defined.
1049   _hint_di = first_di();
1050 
1051   post_initialize(&stream);
1052 
1053   set_size(object_size);
1054 }
1055 
1056 void MethodData::init() {
1057   _invocation_counter.init();
1058   _backedge_counter.init();
1059   _invocation_counter_start = 0;
1060   _backedge_counter_start = 0;
1061   _num_loops = 0;
1062   _num_blocks = 0;
1063   _highest_comp_level = 0;
1064   _highest_osr_comp_level = 0;
1065   _would_profile = true;
1066 
1067   // Initialize flags and trap history.
1068   _nof_decompiles = 0;
1069   _nof_overflow_recompiles = 0;
1070   _nof_overflow_traps = 0;
1071   clear_escape_info();
1072   assert(sizeof(_trap_hist) % sizeof(HeapWord) == 0, "align");
1073   Copy::zero_to_words((HeapWord*) &_trap_hist,
1074                       sizeof(_trap_hist) / sizeof(HeapWord));
1075 }
1076 
1077 // Get a measure of how much mileage the method has on it.
1078 int MethodData::mileage_of(Method* method) {
1079   int mileage = 0;
1080   if (TieredCompilation) {
1081     mileage = MAX2(method->invocation_count(), method->backedge_count());
1082   } else {
1083     int iic = method->interpreter_invocation_count();
1084     if (mileage < iic)  mileage = iic;
1085     MethodCounters* mcs = method->method_counters();
1086     if (mcs != NULL) {
1087       InvocationCounter* ic = mcs->invocation_counter();
1088       InvocationCounter* bc = mcs->backedge_counter();
1089       int icval = ic->count();
1090       if (ic->carry()) icval += CompileThreshold;
1091       if (mileage < icval)  mileage = icval;
1092       int bcval = bc->count();
1093       if (bc->carry()) bcval += CompileThreshold;
1094       if (mileage < bcval)  mileage = bcval;
1095     }
1096   }
1097   return mileage;
1098 }
1099 
1100 bool MethodData::is_mature() const {
1101   return CompilationPolicy::policy()->is_mature(_method);
1102 }
1103 
1104 // Translate a bci to its corresponding data index (di).
1105 address MethodData::bci_to_dp(int bci) {
1106   ResourceMark rm;
1107   ProfileData* data = data_before(bci);
1108   ProfileData* prev = NULL;
1109   for ( ; is_valid(data); data = next_data(data)) {
1110     if (data->bci() >= bci) {
1111       if (data->bci() == bci)  set_hint_di(dp_to_di(data->dp()));
1112       else if (prev != NULL)   set_hint_di(dp_to_di(prev->dp()));
1113       return data->dp();
1114     }
1115     prev = data;
1116   }
1117   return (address)limit_data_position();
1118 }
1119 
1120 // Translate a bci to its corresponding data, or NULL.
1121 ProfileData* MethodData::bci_to_data(int bci) {
1122   ProfileData* data = data_before(bci);
1123   for ( ; is_valid(data); data = next_data(data)) {
1124     if (data->bci() == bci) {
1125       set_hint_di(dp_to_di(data->dp()));
1126       return data;
1127     } else if (data->bci() > bci) {
1128       break;
1129     }
1130   }
1131   return bci_to_extra_data(bci, false);
1132 }
1133 
1134 // Translate a bci to its corresponding extra data, or NULL.
1135 ProfileData* MethodData::bci_to_extra_data(int bci, bool create_if_missing) {
1136   DataLayout* dp    = extra_data_base();
1137   DataLayout* end   = extra_data_limit();
1138   DataLayout* avail = NULL;
1139   for (; dp < end; dp = next_extra(dp)) {
1140     // No need for "OrderAccess::load_acquire" ops,
1141     // since the data structure is monotonic.
1142     if (dp->tag() == DataLayout::no_tag)  break;
1143     if (dp->tag() == DataLayout::arg_info_data_tag) {
1144       dp = end; // ArgInfoData is at the end of extra data section.
1145       break;
1146     }
1147     if (dp->bci() == bci) {
1148       assert(dp->tag() == DataLayout::bit_data_tag, "sane");
1149       return new BitData(dp);
1150     }
1151   }
1152   if (create_if_missing && dp < end) {
1153     // Allocate this one.  There is no mutual exclusion,
1154     // so two threads could allocate different BCIs to the
1155     // same data layout.  This means these extra data
1156     // records, like most other MDO contents, must not be
1157     // trusted too much.
1158     DataLayout temp;
1159     temp.initialize(DataLayout::bit_data_tag, bci, 0);
1160     dp->release_set_header(temp.header());
1161     assert(dp->tag() == DataLayout::bit_data_tag, "sane");
1162     //NO: assert(dp->bci() == bci, "no concurrent allocation");
1163     return new BitData(dp);
1164   }
1165   return NULL;
1166 }
1167 
1168 ArgInfoData *MethodData::arg_info() {
1169   DataLayout* dp    = extra_data_base();
1170   DataLayout* end   = extra_data_limit();
1171   for (; dp < end; dp = next_extra(dp)) {
1172     if (dp->tag() == DataLayout::arg_info_data_tag)
1173       return new ArgInfoData(dp);
1174   }
1175   return NULL;
1176 }
1177 
1178 // Printing
1179 
1180 #ifndef PRODUCT
1181 
1182 void MethodData::print_on(outputStream* st) const {
1183   assert(is_methodData(), "should be method data");
1184   st->print("method data for ");
1185   method()->print_value_on(st);
1186   st->cr();
1187   print_data_on(st);
1188 }
1189 
1190 #endif //PRODUCT
1191 
1192 void MethodData::print_value_on(outputStream* st) const {
1193   assert(is_methodData(), "should be method data");
1194   st->print("method data for ");
1195   method()->print_value_on(st);
1196 }
1197 
1198 #ifndef PRODUCT
1199 void MethodData::print_data_on(outputStream* st) const {
1200   ResourceMark rm;
1201   ProfileData* data = first_data();
1202   if (_parameters_type_data_di != -1) {
1203     parameters_type_data()->print_data_on(st);
1204   }
1205   for ( ; is_valid(data); data = next_data(data)) {
1206     st->print("%d", dp_to_di(data->dp()));
1207     st->fill_to(6);
1208     data->print_data_on(st);
1209   }
1210   st->print_cr("--- Extra data:");
1211   DataLayout* dp    = extra_data_base();
1212   DataLayout* end   = extra_data_limit();
1213   for (; dp < end; dp = next_extra(dp)) {
1214     // No need for "OrderAccess::load_acquire" ops,
1215     // since the data structure is monotonic.
1216     if (dp->tag() == DataLayout::no_tag)  continue;
1217     if (dp->tag() == DataLayout::bit_data_tag) {
1218       data = new BitData(dp);
1219     } else {
1220       assert(dp->tag() == DataLayout::arg_info_data_tag, "must be BitData or ArgInfo");
1221       data = new ArgInfoData(dp);
1222       dp = end; // ArgInfoData is at the end of extra data section.
1223     }
1224     st->print("%d", dp_to_di(data->dp()));
1225     st->fill_to(6);
1226     data->print_data_on(st);
1227   }
1228 }
1229 #endif
1230 
1231 #if INCLUDE_SERVICES
1232 // Size Statistics
1233 void MethodData::collect_statistics(KlassSizeStats *sz) const {
1234   int n = sz->count(this);
1235   sz->_method_data_bytes += n;
1236   sz->_method_all_bytes += n;
1237   sz->_rw_bytes += n;
1238 }
1239 #endif // INCLUDE_SERVICES
1240 
1241 // Verification
1242 
1243 void MethodData::verify_on(outputStream* st) {
1244   guarantee(is_methodData(), "object must be method data");
1245   // guarantee(m->is_perm(), "should be in permspace");
1246   this->verify_data_on(st);
1247 }
1248 
1249 void MethodData::verify_data_on(outputStream* st) {
1250   NEEDS_CLEANUP;
1251   // not yet implemented.
1252 }
1253 
1254 bool MethodData::profile_jsr292(methodHandle m, int bci) {
1255   if (m->is_compiled_lambda_form()) {
1256     return true;
1257   }
1258 
1259   Bytecode_invoke inv(m , bci);
1260   return inv.is_invokedynamic() || inv.is_invokehandle();
1261 }
1262 
1263 int MethodData::profile_arguments_flag() {
1264   return TypeProfileLevel % 10;
1265 }
1266 
1267 bool MethodData::profile_arguments() {
1268   return profile_arguments_flag() > no_type_profile && profile_arguments_flag() <= type_profile_all;
1269 }
1270 
1271 bool MethodData::profile_arguments_jsr292_only() {
1272   return profile_arguments_flag() == type_profile_jsr292;
1273 }
1274 
1275 bool MethodData::profile_all_arguments() {
1276   return profile_arguments_flag() == type_profile_all;
1277 }
1278 
1279 bool MethodData::profile_arguments_for_invoke(methodHandle m, int bci) {
1280   if (!profile_arguments()) {
1281     return false;
1282   }
1283 
1284   if (profile_all_arguments()) {
1285     return true;
1286   }
1287 
1288   assert(profile_arguments_jsr292_only(), "inconsistent");
1289   return profile_jsr292(m, bci);
1290 }
1291 
1292 int MethodData::profile_return_flag() {
1293   return (TypeProfileLevel % 100) / 10;
1294 }
1295 
1296 bool MethodData::profile_return() {
1297   return profile_return_flag() > no_type_profile && profile_return_flag() <= type_profile_all;
1298 }
1299 
1300 bool MethodData::profile_return_jsr292_only() {
1301   return profile_return_flag() == type_profile_jsr292;
1302 }
1303 
1304 bool MethodData::profile_all_return() {
1305   return profile_return_flag() == type_profile_all;
1306 }
1307 
1308 bool MethodData::profile_return_for_invoke(methodHandle m, int bci) {
1309   if (!profile_return()) {
1310     return false;
1311   }
1312 
1313   if (profile_all_return()) {
1314     return true;
1315   }
1316 
1317   assert(profile_return_jsr292_only(), "inconsistent");
1318   return profile_jsr292(m, bci);
1319 }
1320 
1321 int MethodData::profile_parameters_flag() {
1322   return TypeProfileLevel / 100;
1323 }
1324 
1325 bool MethodData::profile_parameters() {
1326   return profile_parameters_flag() > no_type_profile && profile_parameters_flag() <= type_profile_all;
1327 }
1328 
1329 bool MethodData::profile_parameters_jsr292_only() {
1330   return profile_parameters_flag() == type_profile_jsr292;
1331 }
1332 
1333 bool MethodData::profile_all_parameters() {
1334   return profile_parameters_flag() == type_profile_all;
1335 }
1336 
1337 bool MethodData::profile_parameters_for_method(methodHandle m) {
1338   if (!profile_parameters()) {
1339     return false;
1340   }
1341 
1342   if (profile_all_parameters()) {
1343     return true;
1344   }
1345 
1346   assert(profile_parameters_jsr292_only(), "inconsistent");
1347   return m->is_compiled_lambda_form();
1348 }
--- EOF ---