1 /*
   2  * Copyright (c) 2013, 2022, 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 "jvm.h"
  27 #include "ci/ciMethodData.hpp"
  28 #include "ci/ciReplay.hpp"
  29 #include "ci/ciSymbol.hpp"
  30 #include "ci/ciKlass.hpp"
  31 #include "ci/ciUtilities.inline.hpp"
  32 #include "classfile/javaClasses.hpp"
  33 #include "classfile/symbolTable.hpp"
  34 #include "classfile/systemDictionary.hpp"
  35 #include "compiler/compilationPolicy.hpp"
  36 #include "compiler/compileBroker.hpp"
  37 #include "compiler/compilerDefinitions.inline.hpp"
  38 #include "interpreter/linkResolver.hpp"
  39 #include "memory/allocation.inline.hpp"
  40 #include "memory/oopFactory.hpp"
  41 #include "memory/resourceArea.hpp"
  42 #include "oops/constantPool.hpp"
  43 #include "oops/cpCache.inline.hpp"
  44 #include "oops/fieldStreams.inline.hpp"
  45 #include "oops/inlineKlass.inline.hpp"
  46 #include "oops/klass.inline.hpp"
  47 #include "oops/method.inline.hpp"
  48 #include "oops/oop.inline.hpp"
  49 #include "prims/jvmtiExport.hpp"
  50 #include "prims/methodHandles.hpp"
  51 #include "runtime/fieldDescriptor.inline.hpp"
  52 #include "runtime/globals_extension.hpp"
  53 #include "runtime/handles.inline.hpp"
  54 #include "runtime/java.hpp"
  55 #include "runtime/jniHandles.inline.hpp"
  56 #include "runtime/threads.hpp"
  57 #include "utilities/copy.hpp"
  58 #include "utilities/macros.hpp"
  59 #include "utilities/utf8.hpp"
  60 
  61 // ciReplay
  62 
  63 typedef struct _ciMethodDataRecord {
  64   const char* _klass_name;
  65   const char* _method_name;
  66   const char* _signature;
  67 
  68   int _state;
  69   int _invocation_counter;
  70 
  71   intptr_t* _data;
  72   char*     _orig_data;
  73   Klass**   _classes;
  74   Method**  _methods;
  75   int*      _classes_offsets;
  76   int*      _methods_offsets;
  77   int       _data_length;
  78   int       _orig_data_length;
  79   int       _classes_length;
  80   int       _methods_length;
  81 } ciMethodDataRecord;
  82 
  83 typedef struct _ciMethodRecord {
  84   const char* _klass_name;
  85   const char* _method_name;
  86   const char* _signature;
  87 
  88   int _instructions_size;
  89   int _interpreter_invocation_count;
  90   int _interpreter_throwout_count;
  91   int _invocation_counter;
  92   int _backedge_counter;
  93 } ciMethodRecord;
  94 
  95 typedef struct _ciInstanceKlassRecord {
  96   const InstanceKlass* _klass;
  97   jobject _java_mirror; // Global handle to java mirror to prevent unloading
  98 } ciInstanceKlassRecord;
  99 
 100 typedef struct _ciInlineRecord {
 101   const char* _klass_name;
 102   const char* _method_name;
 103   const char* _signature;
 104 
 105   int _inline_depth;
 106   int _inline_bci;
 107   bool _inline_late;
 108 } ciInlineRecord;
 109 
 110 class  CompileReplay;
 111 static CompileReplay* replay_state;
 112 
 113 class CompileReplay : public StackObj {
 114  private:
 115   FILE*   _stream;
 116   Thread* _thread;
 117   Handle  _protection_domain;
 118   bool    _protection_domain_initialized;
 119   Handle  _loader;
 120   int     _version;
 121 
 122   GrowableArray<ciMethodRecord*>     _ci_method_records;
 123   GrowableArray<ciMethodDataRecord*> _ci_method_data_records;
 124   GrowableArray<ciInstanceKlassRecord*> _ci_instance_klass_records;
 125 
 126   // Use pointer because we may need to return inline records
 127   // without destroying them.
 128   GrowableArray<ciInlineRecord*>*    _ci_inline_records;
 129 
 130   const char* _error_message;
 131 
 132   char* _bufptr;
 133   char* _buffer;
 134   int   _buffer_length;
 135 
 136   // "compile" data
 137   ciKlass* _iklass;
 138   Method*  _imethod;
 139   int      _entry_bci;
 140   int      _comp_level;
 141 
 142  public:
 143   CompileReplay(const char* filename, TRAPS) {
 144     _thread = THREAD;
 145     _loader = Handle(_thread, SystemDictionary::java_system_loader());
 146     _protection_domain = Handle();
 147     _protection_domain_initialized = false;
 148 
 149     _stream = os::fopen(filename, "rt");
 150     if (_stream == NULL) {
 151       fprintf(stderr, "ERROR: Can't open replay file %s\n", filename);
 152     }
 153 
 154     _ci_inline_records = NULL;
 155     _error_message = NULL;
 156 
 157     _buffer_length = 32;
 158     _buffer = NEW_RESOURCE_ARRAY(char, _buffer_length);
 159     _bufptr = _buffer;
 160 
 161     _imethod = NULL;
 162     _iklass  = NULL;
 163     _entry_bci  = 0;
 164     _comp_level = 0;
 165     _version = 0;
 166 
 167     test();
 168   }
 169 
 170   ~CompileReplay() {
 171     if (_stream != NULL) fclose(_stream);
 172   }
 173 
 174   void test() {
 175     strcpy(_buffer, "1 2 foo 4 bar 0x9 \"this is it\"");
 176     _bufptr = _buffer;
 177     assert(parse_int("test") == 1, "what");
 178     assert(parse_int("test") == 2, "what");
 179     assert(strcmp(parse_string(), "foo") == 0, "what");
 180     assert(parse_int("test") == 4, "what");
 181     assert(strcmp(parse_string(), "bar") == 0, "what");
 182     assert(parse_intptr_t("test") == 9, "what");
 183     assert(strcmp(parse_quoted_string(), "this is it") == 0, "what");
 184   }
 185 
 186   bool had_error() {
 187     return _error_message != NULL || _thread->has_pending_exception();
 188   }
 189 
 190   bool can_replay() {
 191     return !(_stream == NULL || had_error());
 192   }
 193 
 194   void report_error(const char* msg) {
 195     _error_message = msg;
 196   }
 197 
 198   int parse_int(const char* label) {
 199     if (had_error()) {
 200       return 0;
 201     }
 202 
 203     int v = 0;
 204     int read;
 205     if (sscanf(_bufptr, "%i%n", &v, &read) != 1) {
 206       report_error(label);
 207     } else {
 208       _bufptr += read;
 209     }
 210     return v;
 211   }
 212 
 213   intptr_t parse_intptr_t(const char* label) {
 214     if (had_error()) {
 215       return 0;
 216     }
 217 
 218     intptr_t v = 0;
 219     int read;
 220     if (sscanf(_bufptr, INTPTR_FORMAT "%n", &v, &read) != 1) {
 221       report_error(label);
 222     } else {
 223       _bufptr += read;
 224     }
 225     return v;
 226   }
 227 
 228   void skip_ws() {
 229     // Skip any leading whitespace
 230     while (*_bufptr == ' ' || *_bufptr == '\t') {
 231       _bufptr++;
 232     }
 233   }
 234 
 235   // Ignore the rest of the line
 236   void skip_remaining() {
 237     _bufptr = &_bufptr[strlen(_bufptr)]; // skip ahead to terminator
 238   }
 239 
 240   char* scan_and_terminate(char delim) {
 241     char* str = _bufptr;
 242     while (*_bufptr != delim && *_bufptr != '\0') {
 243       _bufptr++;
 244     }
 245     if (*_bufptr != '\0') {
 246       *_bufptr++ = '\0';
 247     }
 248     if (_bufptr == str) {
 249       // nothing here
 250       return NULL;
 251     }
 252     return str;
 253   }
 254 
 255   char* parse_string() {
 256     if (had_error()) return NULL;
 257 
 258     skip_ws();
 259     return scan_and_terminate(' ');
 260   }
 261 
 262   char* parse_quoted_string() {
 263     if (had_error()) return NULL;
 264 
 265     skip_ws();
 266 
 267     if (*_bufptr == '"') {
 268       _bufptr++;
 269       return scan_and_terminate('"');
 270     } else {
 271       return scan_and_terminate(' ');
 272     }
 273   }
 274 
 275   char* parse_escaped_string() {
 276     char* result = parse_quoted_string();
 277     if (result != NULL) {
 278       unescape_string(result);
 279     }
 280     return result;
 281   }
 282 
 283   // Look for the tag 'tag' followed by an
 284   bool parse_tag_and_count(const char* tag, int& length) {
 285     const char* t = parse_string();
 286     if (t == NULL) {
 287       return false;
 288     }
 289 
 290     if (strcmp(tag, t) != 0) {
 291       report_error(tag);
 292       return false;
 293     }
 294     length = parse_int("parse_tag_and_count");
 295     return !had_error();
 296   }
 297 
 298   // Parse a sequence of raw data encoded as bytes and return the
 299   // resulting data.
 300   char* parse_data(const char* tag, int& length) {
 301     int read_size = 0;
 302     if (!parse_tag_and_count(tag, read_size)) {
 303       return NULL;
 304     }
 305 
 306     int actual_size = sizeof(MethodData::CompilerCounters);
 307     char *result = NEW_RESOURCE_ARRAY(char, actual_size);
 308     int i = 0;
 309     if (read_size != actual_size) {
 310       tty->print_cr("Warning: ciMethodData parsing sees MethodData size %i in file, current is %i", read_size,
 311                     actual_size);
 312       // Replay serializes the entire MethodData, but the data is at the end.
 313       // If the MethodData instance size has changed, we can pad or truncate in the beginning
 314       int padding = actual_size - read_size;
 315       if (padding > 0) {
 316         // pad missing data with zeros
 317         tty->print_cr("- Padding MethodData");
 318         for (; i < padding; i++) {
 319           result[i] = 0;
 320         }
 321       } else if (padding < 0) {
 322         // drop some data
 323         tty->print_cr("- Truncating MethodData");
 324         for (int j = 0; j < -padding; j++) {
 325           int val = parse_int("data");
 326           // discard val
 327         }
 328       }
 329     }
 330 
 331     assert(i < actual_size, "At least some data must remain to be copied");
 332     for (; i < actual_size; i++) {
 333       int val = parse_int("data");
 334       result[i] = val;
 335     }
 336     length = actual_size;
 337     return result;
 338   }
 339 
 340   // Parse a standard chunk of data emitted as:
 341   //   'tag' <length> # # ...
 342   // Where each # is an intptr_t item
 343   intptr_t* parse_intptr_data(const char* tag, int& length) {
 344     if (!parse_tag_and_count(tag, length)) {
 345       return NULL;
 346     }
 347 
 348     intptr_t* result = NEW_RESOURCE_ARRAY(intptr_t, length);
 349     for (int i = 0; i < length; i++) {
 350       skip_ws();
 351       intptr_t val = parse_intptr_t("data");
 352       result[i] = val;
 353     }
 354     return result;
 355   }
 356 
 357   // Parse a possibly quoted version of a symbol into a symbolOop
 358   Symbol* parse_symbol() {
 359     const char* str = parse_escaped_string();
 360     if (str != NULL) {
 361       Symbol* sym = SymbolTable::new_symbol(str);
 362       return sym;
 363     }
 364     return NULL;
 365   }
 366 
 367   bool parse_terminator() {
 368     char* terminator = parse_string();
 369     if (terminator != NULL && strcmp(terminator, ";") == 0) {
 370       return true;
 371     }
 372     return false;
 373   }
 374 
 375   // Parse a special hidden klass location syntax
 376   // syntax: @bci <klass> <name> <signature> <bci> <location>* ;
 377   // syntax: @cpi <klass> <cpi> <location>* ;
 378   Klass* parse_cp_ref(TRAPS) {
 379     JavaThread* thread = THREAD;
 380     oop obj = NULL;
 381     char* ref = parse_string();
 382     if (strcmp(ref, "bci") == 0) {
 383       Method* m = parse_method(CHECK_NULL);
 384       if (m == NULL) {
 385         return NULL;
 386       }
 387 
 388       InstanceKlass* ik = m->method_holder();
 389       const constantPoolHandle cp(Thread::current(), ik->constants());
 390 
 391       // invokedynamic or invokehandle
 392 
 393       methodHandle caller(Thread::current(), m);
 394       int bci = parse_int("bci");
 395       if (m->validate_bci(bci) != bci) {
 396         report_error("bad bci");
 397         return NULL;
 398       }
 399 
 400       ik->link_class(CHECK_NULL);
 401 
 402       Bytecode_invoke bytecode = Bytecode_invoke_check(caller, bci);
 403       if (!Bytecodes::is_defined(bytecode.code()) || !bytecode.is_valid()) {
 404         report_error("no invoke found at bci");
 405         return NULL;
 406       }
 407       bytecode.verify();
 408       int index = bytecode.index();
 409 
 410       ConstantPoolCacheEntry* cp_cache_entry = NULL;
 411       CallInfo callInfo;
 412       Bytecodes::Code bc = bytecode.invoke_code();
 413       LinkResolver::resolve_invoke(callInfo, Handle(), cp, index, bc, CHECK_NULL);
 414       if (bytecode.is_invokedynamic()) {
 415         cp_cache_entry = cp->invokedynamic_cp_cache_entry_at(index);
 416         cp_cache_entry->set_dynamic_call(cp, callInfo);
 417       } else if (bytecode.is_invokehandle()) {
 418 #ifdef ASSERT
 419         Klass* holder = cp->klass_ref_at(index, CHECK_NULL);
 420         Symbol* name = cp->name_ref_at(index);
 421         assert(MethodHandles::is_signature_polymorphic_name(holder, name), "");
 422 #endif
 423         cp_cache_entry = cp->cache()->entry_at(cp->decode_cpcache_index(index));
 424         cp_cache_entry->set_method_handle(cp, callInfo);
 425       } else {
 426         report_error("no dynamic invoke found");
 427         return NULL;
 428       }
 429       char* dyno_ref = parse_string();
 430       if (strcmp(dyno_ref, "<appendix>") == 0) {
 431         obj = cp_cache_entry->appendix_if_resolved(cp);
 432       } else if (strcmp(dyno_ref, "<adapter>") == 0) {
 433         if (!parse_terminator()) {
 434           report_error("no dynamic invoke found");
 435           return NULL;
 436         }
 437         Method* adapter = cp_cache_entry->f1_as_method();
 438         if (adapter == NULL) {
 439           report_error("no adapter found");
 440           return NULL;
 441         }
 442         return adapter->method_holder();
 443       } else if (strcmp(dyno_ref, "<bsm>") == 0) {
 444         int pool_index = cp_cache_entry->constant_pool_index();
 445         BootstrapInfo bootstrap_specifier(cp, pool_index, index);
 446         obj = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), CHECK_NULL);
 447       } else {
 448         report_error("unrecognized token");
 449         return NULL;
 450       }
 451     } else {
 452       // constant pool ref (MethodHandle)
 453       if (strcmp(ref, "cpi") != 0) {
 454         report_error("unexpected token");
 455         return NULL;
 456       }
 457 
 458       Klass* k = parse_klass(CHECK_NULL);
 459       if (k == NULL) {
 460         return NULL;
 461       }
 462       InstanceKlass* ik = InstanceKlass::cast(k);
 463       const constantPoolHandle cp(Thread::current(), ik->constants());
 464 
 465       int cpi = parse_int("cpi");
 466 
 467       if (cpi >= cp->length()) {
 468         report_error("bad cpi");
 469         return NULL;
 470       }
 471       if (!cp->tag_at(cpi).is_method_handle()) {
 472         report_error("no method handle found at cpi");
 473         return NULL;
 474       }
 475       ik->link_class(CHECK_NULL);
 476       obj = cp->resolve_possibly_cached_constant_at(cpi, CHECK_NULL);
 477     }
 478     if (obj == NULL) {
 479       report_error("null cp object found");
 480       return NULL;
 481     }
 482     Klass* k = NULL;
 483     skip_ws();
 484     // loop: read fields
 485     char* field = NULL;
 486     do {
 487       field = parse_string();
 488       if (field == NULL) {
 489         report_error("no field found");
 490         return NULL;
 491       }
 492       if (strcmp(field, ";") == 0) {
 493         break;
 494       }
 495       // raw Method*
 496       if (strcmp(field, "<vmtarget>") == 0) {
 497         Method* vmtarget = java_lang_invoke_MemberName::vmtarget(obj);
 498         k = (vmtarget == NULL) ? NULL : vmtarget->method_holder();
 499         if (k == NULL) {
 500           report_error("null vmtarget found");
 501           return NULL;
 502         }
 503         if (!parse_terminator()) {
 504           report_error("missing terminator");
 505           return NULL;
 506         }
 507         return k;
 508       }
 509       obj = ciReplay::obj_field(obj, field);
 510       // array
 511       if (obj != NULL && obj->is_objArray()) {
 512         objArrayOop arr = (objArrayOop)obj;
 513         int index = parse_int("index");
 514         if (index >= arr->length()) {
 515           report_error("bad array index");
 516           return NULL;
 517         }
 518         obj = arr->obj_at(index);
 519       }
 520     } while (obj != NULL);
 521     if (obj == NULL) {
 522       report_error("null field found");
 523       return NULL;
 524     }
 525     k = obj->klass();
 526     return k;
 527   }
 528 
 529   // Parse a valid klass name and look it up
 530   // syntax: <name>
 531   // syntax: <constant pool ref>
 532   Klass* parse_klass(TRAPS) {
 533     skip_ws();
 534     // check for constant pool object reference (for a dynamic/hidden class)
 535     bool cp_ref = (*_bufptr == '@');
 536     if (cp_ref) {
 537       ++_bufptr;
 538       Klass* k = parse_cp_ref(CHECK_NULL);
 539       if (k != NULL && !k->is_hidden()) {
 540         report_error("expected hidden class");
 541         return NULL;
 542       }
 543       return k;
 544     }
 545     char* str = parse_escaped_string();
 546     Symbol* klass_name = SymbolTable::new_symbol(str);
 547     if (klass_name != NULL) {
 548       Klass* k = NULL;
 549       if (_iklass != NULL) {
 550         k = (Klass*)_iklass->find_klass(ciSymbol::make(klass_name->as_C_string()))->constant_encoding();
 551       } else {
 552         k = SystemDictionary::resolve_or_fail(klass_name, _loader, _protection_domain, true, THREAD);
 553       }
 554       if (HAS_PENDING_EXCEPTION) {
 555         oop throwable = PENDING_EXCEPTION;
 556         java_lang_Throwable::print(throwable, tty);
 557         tty->cr();
 558         report_error(str);
 559         if (ReplayIgnoreInitErrors) {
 560           CLEAR_PENDING_EXCEPTION;
 561           _error_message = NULL;
 562         }
 563         return NULL;
 564       }
 565       return k;
 566     }
 567     return NULL;
 568   }
 569 
 570   // Lookup a klass
 571   Klass* resolve_klass(const char* klass, TRAPS) {
 572     Symbol* klass_name = SymbolTable::new_symbol(klass);
 573     return SystemDictionary::resolve_or_fail(klass_name, _loader, _protection_domain, true, THREAD);
 574   }
 575 
 576   // Parse the standard tuple of <klass> <name> <signature>
 577   Method* parse_method(TRAPS) {
 578     InstanceKlass* k = (InstanceKlass*)parse_klass(CHECK_NULL);
 579     if (k == NULL) {
 580       report_error("Can't find holder klass");
 581       return NULL;
 582     }
 583     Symbol* method_name = parse_symbol();
 584     Symbol* method_signature = parse_symbol();
 585     Method* m = k->find_method(method_name, method_signature);
 586     if (m == NULL) {
 587       report_error("Can't find method");
 588     }
 589     return m;
 590   }
 591 
 592   int get_line(int c) {
 593     int buffer_pos = 0;
 594     while(c != EOF) {
 595       if (buffer_pos + 1 >= _buffer_length) {
 596         int new_length = _buffer_length * 2;
 597         // Next call will throw error in case of OOM.
 598         _buffer = REALLOC_RESOURCE_ARRAY(char, _buffer, _buffer_length, new_length);
 599         _buffer_length = new_length;
 600       }
 601       if (c == '\n') {
 602         c = getc(_stream); // get next char
 603         break;
 604       } else if (c == '\r') {
 605         // skip LF
 606       } else {
 607         _buffer[buffer_pos++] = c;
 608       }
 609       c = getc(_stream);
 610     }
 611     // null terminate it, reset the pointer
 612     _buffer[buffer_pos] = '\0'; // NL or EOF
 613     _bufptr = _buffer;
 614     return c;
 615   }
 616 
 617   // Process each line of the replay file executing each command until
 618   // the file ends.
 619   void process(TRAPS) {
 620     int line_no = 1;
 621     int c = getc(_stream);
 622     while(c != EOF) {
 623       c = get_line(c);
 624       process_command(THREAD);
 625       if (had_error()) {
 626         int pos = _bufptr - _buffer + 1;
 627         tty->print_cr("Error while parsing line %d at position %d: %s\n", line_no, pos, _error_message);
 628         if (ReplayIgnoreInitErrors) {
 629           CLEAR_PENDING_EXCEPTION;
 630           _error_message = NULL;
 631         } else {
 632           return;
 633         }
 634       }
 635       line_no++;
 636     }
 637     reset();
 638   }
 639 
 640   void process_command(TRAPS) {
 641     char* cmd = parse_string();
 642     if (cmd == NULL) {
 643       return;
 644     }
 645     if (strcmp("#", cmd) == 0) {
 646       // comment line, print or ignore
 647       if (Verbose) {
 648         tty->print_cr("# %s", _bufptr);
 649       }
 650       skip_remaining();
 651     } else if (strcmp("version", cmd) == 0) {
 652       _version = parse_int("version");
 653       if (_version < 0 || _version > REPLAY_VERSION) {
 654         tty->print_cr("# unrecognized version %d, expected 0 <= version <= %d", _version, REPLAY_VERSION);
 655       }
 656     } else if (strcmp("compile", cmd) == 0) {
 657       process_compile(CHECK);
 658     } else if (strcmp("ciMethod", cmd) == 0) {
 659       process_ciMethod(CHECK);
 660     } else if (strcmp("ciMethodData", cmd) == 0) {
 661       process_ciMethodData(CHECK);
 662     } else if (strcmp("staticfield", cmd) == 0) {
 663       process_staticfield(CHECK);
 664     } else if (strcmp("ciInstanceKlass", cmd) == 0) {
 665       process_ciInstanceKlass(CHECK);
 666     } else if (strcmp("instanceKlass", cmd) == 0) {
 667       process_instanceKlass(CHECK);
 668 #if INCLUDE_JVMTI
 669     } else if (strcmp("JvmtiExport", cmd) == 0) {
 670       process_JvmtiExport(CHECK);
 671 #endif // INCLUDE_JVMTI
 672     } else {
 673       report_error("unknown command");
 674     }
 675     if (!had_error() && *_bufptr != '\0') {
 676       report_error("line not properly terminated");
 677     }
 678   }
 679 
 680   // validation of comp_level
 681   bool is_valid_comp_level(int comp_level) {
 682     const int msg_len = 256;
 683     char* msg = NULL;
 684     if (!is_compile(comp_level)) {
 685       msg = NEW_RESOURCE_ARRAY(char, msg_len);
 686       jio_snprintf(msg, msg_len, "%d isn't compilation level", comp_level);
 687     } else if (is_c1_compile(comp_level) && !CompilerConfig::is_c1_enabled()) {
 688       msg = NEW_RESOURCE_ARRAY(char, msg_len);
 689       jio_snprintf(msg, msg_len, "compilation level %d requires C1", comp_level);
 690     } else if (is_c2_compile(comp_level) && !CompilerConfig::is_c2_enabled()) {
 691       msg = NEW_RESOURCE_ARRAY(char, msg_len);
 692       jio_snprintf(msg, msg_len, "compilation level %d requires C2", comp_level);
 693     }
 694     if (msg != NULL) {
 695       report_error(msg);
 696       return false;
 697     }
 698     return true;
 699   }
 700 
 701   // compile <klass> <name> <signature> <entry_bci> <comp_level> inline <count> (<depth> <bci> <klass> <name> <signature>)*
 702   void* process_inline(ciMethod* imethod, Method* m, int entry_bci, int comp_level, TRAPS) {
 703     _imethod    = m;
 704     _iklass     = imethod->holder();
 705     _entry_bci  = entry_bci;
 706     _comp_level = comp_level;
 707     int line_no = 1;
 708     int c = getc(_stream);
 709     while(c != EOF) {
 710       c = get_line(c);
 711       // Expecting only lines with "compile" command in inline replay file.
 712       char* cmd = parse_string();
 713       if (cmd == NULL || strcmp("compile", cmd) != 0) {
 714         return NULL;
 715       }
 716       process_compile(CHECK_NULL);
 717       if (had_error()) {
 718         tty->print_cr("Error while parsing line %d: %s\n", line_no, _error_message);
 719         tty->print_cr("%s", _buffer);
 720         return NULL;
 721       }
 722       if (_ci_inline_records != NULL && _ci_inline_records->length() > 0) {
 723         // Found inlining record for the requested method.
 724         return _ci_inline_records;
 725       }
 726       line_no++;
 727     }
 728     return NULL;
 729   }
 730 
 731   // compile <klass> <name> <signature> <entry_bci> <comp_level> inline <count> (<depth> <bci> <inline_late> <klass> <name> <signature>)*
 732   void process_compile(TRAPS) {
 733     Method* method = parse_method(CHECK);
 734     if (had_error()) return;
 735     int entry_bci = parse_int("entry_bci");
 736     int comp_level = parse_int("comp_level");
 737     if (!is_valid_comp_level(comp_level)) {
 738       return;
 739     }
 740     if (_imethod != NULL) {
 741       // Replay Inlining
 742       if (entry_bci != _entry_bci || comp_level != _comp_level) {
 743         return;
 744       }
 745       const char* iklass_name  = _imethod->method_holder()->name()->as_utf8();
 746       const char* imethod_name = _imethod->name()->as_utf8();
 747       const char* isignature   = _imethod->signature()->as_utf8();
 748       const char* klass_name   = method->method_holder()->name()->as_utf8();
 749       const char* method_name  = method->name()->as_utf8();
 750       const char* signature    = method->signature()->as_utf8();
 751       if (strcmp(iklass_name,  klass_name)  != 0 ||
 752           strcmp(imethod_name, method_name) != 0 ||
 753           strcmp(isignature,   signature)   != 0) {
 754         return;
 755       }
 756     }
 757     int inline_count = 0;
 758     if (parse_tag_and_count("inline", inline_count)) {
 759       // Record inlining data
 760       _ci_inline_records = new GrowableArray<ciInlineRecord*>();
 761       for (int i = 0; i < inline_count; i++) {
 762         int depth = parse_int("inline_depth");
 763         int bci = parse_int("inline_bci");
 764         if (had_error()) {
 765           break;
 766         }
 767         int inline_late = 0;
 768         if (_version >= 2) {
 769           inline_late = parse_int("inline_late");
 770           if (had_error()) {
 771               break;
 772           }
 773         }
 774 
 775         Method* inl_method = parse_method(CHECK);
 776         if (had_error()) {
 777           break;
 778         }
 779         new_ciInlineRecord(inl_method, bci, depth, inline_late);
 780       }
 781     }
 782     if (_imethod != NULL) {
 783       return; // Replay Inlining
 784     }
 785     InstanceKlass* ik = method->method_holder();
 786     ik->initialize(THREAD);
 787     if (HAS_PENDING_EXCEPTION) {
 788       oop throwable = PENDING_EXCEPTION;
 789       java_lang_Throwable::print(throwable, tty);
 790       tty->cr();
 791       if (ReplayIgnoreInitErrors) {
 792         CLEAR_PENDING_EXCEPTION;
 793         ik->set_init_state(InstanceKlass::fully_initialized);
 794       } else {
 795         return;
 796       }
 797     }
 798     // Make sure the existence of a prior compile doesn't stop this one
 799     CompiledMethod* nm = (entry_bci != InvocationEntryBci) ? method->lookup_osr_nmethod_for(entry_bci, comp_level, true) : method->code();
 800     if (nm != NULL) {
 801       nm->make_not_entrant();
 802     }
 803     replay_state = this;
 804     CompileBroker::compile_method(methodHandle(THREAD, method), entry_bci, comp_level,
 805                                   methodHandle(), 0, CompileTask::Reason_Replay, THREAD);
 806     replay_state = NULL;
 807   }
 808 
 809   // ciMethod <klass> <name> <signature> <invocation_counter> <backedge_counter> <interpreter_invocation_count> <interpreter_throwout_count> <instructions_size>
 810   void process_ciMethod(TRAPS) {
 811     Method* method = parse_method(CHECK);
 812     if (had_error()) return;
 813     ciMethodRecord* rec = new_ciMethod(method);
 814     rec->_invocation_counter = parse_int("invocation_counter");
 815     rec->_backedge_counter = parse_int("backedge_counter");
 816     rec->_interpreter_invocation_count = parse_int("interpreter_invocation_count");
 817     rec->_interpreter_throwout_count = parse_int("interpreter_throwout_count");
 818     rec->_instructions_size = parse_int("instructions_size");
 819   }
 820 
 821   // ciMethodData <klass> <name> <signature> <state> <invocation_counter> orig <length> <byte>* data <length> <ptr>* oops <length> (<offset> <klass>)* methods <length> (<offset> <klass> <name> <signature>)*
 822   void process_ciMethodData(TRAPS) {
 823     Method* method = parse_method(CHECK);
 824     if (had_error()) return;
 825     /* just copied from Method, to build interpret data*/
 826 
 827     // To be properly initialized, some profiling in the MDO needs the
 828     // method to be rewritten (number of arguments at a call for
 829     // instance)
 830     method->method_holder()->link_class(CHECK);
 831     // Method::build_profiling_method_data(method, CHECK);
 832     {
 833       // Grab a lock here to prevent multiple
 834       // MethodData*s from being created.
 835       MutexLocker ml(THREAD, MethodData_lock);
 836       if (method->method_data() == NULL) {
 837         ClassLoaderData* loader_data = method->method_holder()->class_loader_data();
 838         MethodData* method_data = MethodData::allocate(loader_data, methodHandle(THREAD, method), CHECK);
 839         method->set_method_data(method_data);
 840       }
 841     }
 842 
 843     // collect and record all the needed information for later
 844     ciMethodDataRecord* rec = new_ciMethodData(method);
 845     rec->_state = parse_int("state");
 846     if (_version < 1) {
 847       parse_int("current_mileage");
 848     } else {
 849       rec->_invocation_counter = parse_int("invocation_counter");
 850     }
 851 
 852     rec->_orig_data = parse_data("orig", rec->_orig_data_length);
 853     if (rec->_orig_data == NULL) {
 854       return;
 855     }
 856     rec->_data = parse_intptr_data("data", rec->_data_length);
 857     if (rec->_data == NULL) {
 858       return;
 859     }
 860     if (!parse_tag_and_count("oops", rec->_classes_length)) {
 861       return;
 862     }
 863     rec->_classes = NEW_RESOURCE_ARRAY(Klass*, rec->_classes_length);
 864     rec->_classes_offsets = NEW_RESOURCE_ARRAY(int, rec->_classes_length);
 865     for (int i = 0; i < rec->_classes_length; i++) {
 866       int offset = parse_int("offset");
 867       if (had_error()) {
 868         return;
 869       }
 870       Klass* k = parse_klass(CHECK);
 871       rec->_classes_offsets[i] = offset;
 872       rec->_classes[i] = k;
 873     }
 874 
 875     if (!parse_tag_and_count("methods", rec->_methods_length)) {
 876       return;
 877     }
 878     rec->_methods = NEW_RESOURCE_ARRAY(Method*, rec->_methods_length);
 879     rec->_methods_offsets = NEW_RESOURCE_ARRAY(int, rec->_methods_length);
 880     for (int i = 0; i < rec->_methods_length; i++) {
 881       int offset = parse_int("offset");
 882       if (had_error()) {
 883         return;
 884       }
 885       Method* m = parse_method(CHECK);
 886       rec->_methods_offsets[i] = offset;
 887       rec->_methods[i] = m;
 888     }
 889   }
 890 
 891   // instanceKlass <name>
 892   // instanceKlass <constant pool ref> # <original hidden class name>
 893   //
 894   // Loads and initializes the klass 'name'.  This can be used to
 895   // create particular class loading environments
 896   void process_instanceKlass(TRAPS) {
 897     // just load the referenced class
 898     Klass* k = parse_klass(CHECK);
 899 
 900     if (_version >= 1) {
 901       if (!_protection_domain_initialized && k != NULL) {
 902         assert(_protection_domain() == NULL, "must be uninitialized");
 903         // The first entry is the holder class of the method for which a replay compilation is requested.
 904         // Use the same protection domain to load all subsequent classes in order to resolve all classes
 905         // in signatures of inlinees. This ensures that inlining can be done as stated in the replay file.
 906         _protection_domain = Handle(_thread, k->protection_domain());
 907       }
 908 
 909       _protection_domain_initialized = true;
 910     }
 911 
 912     if (k == NULL) {
 913       return;
 914     }
 915     const char* comment = parse_string();
 916     bool is_comment = comment != NULL && strcmp(comment, "#") == 0;
 917     if (k->is_hidden() != is_comment) {
 918       report_error("hidden class with comment expected");
 919       return;
 920     }
 921     // comment, print or ignore
 922     if (is_comment) {
 923       if (Verbose) {
 924         const char* hidden = parse_string();
 925         tty->print_cr("Found %s for %s", k->name()->as_quoted_ascii(), hidden);
 926       }
 927       skip_remaining();
 928     }
 929   }
 930 
 931   // ciInstanceKlass <name> <is_linked> <is_initialized> <length> tag*
 932   //
 933   // Load the klass 'name' and link or initialize it.  Verify that the
 934   // constant pool is the same length as 'length' and make sure the
 935   // constant pool tags are in the same state.
 936   void process_ciInstanceKlass(TRAPS) {
 937     InstanceKlass* k = (InstanceKlass*)parse_klass(CHECK);
 938     if (k == NULL) {
 939       skip_remaining();
 940       return;
 941     }
 942     int is_linked = parse_int("is_linked");
 943     int is_initialized = parse_int("is_initialized");
 944     int length = parse_int("length");
 945     if (is_initialized) {
 946       k->initialize(THREAD);
 947       if (HAS_PENDING_EXCEPTION) {
 948         oop throwable = PENDING_EXCEPTION;
 949         java_lang_Throwable::print(throwable, tty);
 950         tty->cr();
 951         if (ReplayIgnoreInitErrors) {
 952           CLEAR_PENDING_EXCEPTION;
 953           k->set_init_state(InstanceKlass::fully_initialized);
 954         } else {
 955           return;
 956         }
 957       }
 958     } else if (is_linked) {
 959       k->link_class(CHECK);
 960     }
 961     new_ciInstanceKlass(k);
 962     ConstantPool* cp = k->constants();
 963     if (length != cp->length()) {
 964       report_error("constant pool length mismatch: wrong class files?");
 965       return;
 966     }
 967 
 968     int parsed_two_word = 0;
 969     for (int i = 1; i < length; i++) {
 970       int tag = parse_int("tag");
 971       if (had_error()) {
 972         return;
 973       }
 974       switch (cp->tag_at(i).value()) {
 975         case JVM_CONSTANT_UnresolvedClass: {
 976           if (tag == JVM_CONSTANT_Class) {
 977             tty->print_cr("Resolving klass %s at %d", cp->klass_name_at(i)->as_utf8(), i);
 978             Klass* k = cp->klass_at(i, CHECK);
 979           }
 980           break;
 981         }
 982 
 983         case JVM_CONSTANT_Long:
 984         case JVM_CONSTANT_Double:
 985           parsed_two_word = i + 1;
 986 
 987         case JVM_CONSTANT_ClassIndex:
 988         case JVM_CONSTANT_StringIndex:
 989         case JVM_CONSTANT_String:
 990         case JVM_CONSTANT_UnresolvedClassInError:
 991         case JVM_CONSTANT_Fieldref:
 992         case JVM_CONSTANT_Methodref:
 993         case JVM_CONSTANT_InterfaceMethodref:
 994         case JVM_CONSTANT_NameAndType:
 995         case JVM_CONSTANT_Utf8:
 996         case JVM_CONSTANT_Integer:
 997         case JVM_CONSTANT_Float:
 998         case JVM_CONSTANT_MethodHandle:
 999         case JVM_CONSTANT_MethodType:
1000         case JVM_CONSTANT_Dynamic:
1001         case JVM_CONSTANT_InvokeDynamic:
1002           if (tag != cp->tag_at(i).value()) {
1003             report_error("tag mismatch: wrong class files?");
1004             return;
1005           }
1006           break;
1007 
1008         case JVM_CONSTANT_Class:
1009           if (tag == JVM_CONSTANT_UnresolvedClass) {
1010             Klass* k = cp->klass_at(i, CHECK);
1011             tty->print_cr("Warning: entry was unresolved in the replay data: %s", k->name()->as_utf8());
1012           } else if (tag != JVM_CONSTANT_Class) {
1013             report_error("Unexpected tag");
1014             return;
1015           }
1016           break;
1017 
1018         case 0:
1019           if (parsed_two_word == i) continue;
1020 
1021         default:
1022           fatal("Unexpected tag: %d", cp->tag_at(i).value());
1023           break;
1024       }
1025 
1026     }
1027   }
1028 
1029   class InlineTypeFieldInitializer : public FieldClosure {
1030     oop _vt;
1031     CompileReplay* _replay;
1032   public:
1033     InlineTypeFieldInitializer(oop vt, CompileReplay* replay)
1034   : _vt(vt), _replay(replay) {}
1035 
1036     void do_field(fieldDescriptor* fd) {
1037       BasicType bt = fd->field_type();
1038       const char* string_value = bt != T_PRIMITIVE_OBJECT ? _replay->parse_escaped_string() : NULL;
1039       switch (bt) {
1040       case T_BYTE: {
1041         int value = atoi(string_value);
1042         _vt->byte_field_put(fd->offset(), value);
1043         break;
1044       }
1045       case T_BOOLEAN: {
1046         int value = atoi(string_value);
1047         _vt->bool_field_put(fd->offset(), value);
1048         break;
1049       }
1050       case T_SHORT: {
1051         int value = atoi(string_value);
1052         _vt->short_field_put(fd->offset(), value);
1053         break;
1054       }
1055       case T_CHAR: {
1056         int value = atoi(string_value);
1057         _vt->char_field_put(fd->offset(), value);
1058         break;
1059       }
1060       case T_INT: {
1061         int value = atoi(string_value);
1062         _vt->int_field_put(fd->offset(), value);
1063         break;
1064       }
1065       case T_LONG: {
1066         jlong value;
1067         if (sscanf(string_value, JLONG_FORMAT, &value) != 1) {
1068           fprintf(stderr, "Error parsing long: %s\n", string_value);
1069           break;
1070         }
1071         _vt->long_field_put(fd->offset(), value);
1072         break;
1073       }
1074       case T_FLOAT: {
1075         float value = atof(string_value);
1076         _vt->float_field_put(fd->offset(), value);
1077         break;
1078       }
1079       case T_DOUBLE: {
1080         double value = atof(string_value);
1081         _vt->double_field_put(fd->offset(), value);
1082         break;
1083       }
1084       case T_ARRAY:
1085       case T_OBJECT: {
1086         JavaThread* THREAD = JavaThread::current();
1087         bool res = _replay->process_staticfield_reference(string_value, _vt, fd, THREAD);
1088         assert(res, "should succeed for arrays & objects");
1089         break;
1090       }
1091       case T_PRIMITIVE_OBJECT: {
1092         InlineKlass* vk = InlineKlass::cast(fd->field_holder()->get_inline_type_field_klass(fd->index()));
1093         if (fd->is_inlined()) {
1094           int field_offset = fd->offset() - vk->first_field_offset();
1095           oop obj = cast_to_oop(cast_from_oop<address>(_vt) + field_offset);
1096           InlineTypeFieldInitializer init_fields(obj, _replay);
1097           vk->do_nonstatic_fields(&init_fields);
1098         } else {
1099           oop value = vk->allocate_instance(JavaThread::current());
1100           _vt->obj_field_put(fd->offset(), value);
1101         }
1102         break;
1103       }
1104       default: {
1105         fatal("Unhandled type: %s", type2name(bt));
1106       }
1107       }
1108     }
1109   };
1110 
1111   bool process_staticfield_reference(const char* field_signature, oop java_mirror, fieldDescriptor* fd, TRAPS) {
1112     if (field_signature[0] == JVM_SIGNATURE_ARRAY) {
1113       int length = parse_int("array length");
1114       oop value = NULL;
1115 
1116       if (field_signature[1] == JVM_SIGNATURE_ARRAY) {
1117         // multi dimensional array
1118         Klass* k = resolve_klass(field_signature, CHECK_(true));
1119         ArrayKlass* kelem = (ArrayKlass *)k;
1120         int rank = 0;
1121         while (field_signature[rank] == JVM_SIGNATURE_ARRAY) {
1122           rank++;
1123         }
1124         jint* dims = NEW_RESOURCE_ARRAY(jint, rank);
1125         dims[0] = length;
1126         for (int i = 1; i < rank; i++) {
1127           dims[i] = 1; // These aren't relevant to the compiler
1128         }
1129         value = kelem->multi_allocate(rank, dims, CHECK_(true));
1130       } else {
1131         if (strcmp(field_signature, "[B") == 0) {
1132           value = oopFactory::new_byteArray(length, CHECK_(true));
1133         } else if (strcmp(field_signature, "[Z") == 0) {
1134           value = oopFactory::new_boolArray(length, CHECK_(true));
1135         } else if (strcmp(field_signature, "[C") == 0) {
1136           value = oopFactory::new_charArray(length, CHECK_(true));
1137         } else if (strcmp(field_signature, "[S") == 0) {
1138           value = oopFactory::new_shortArray(length, CHECK_(true));
1139         } else if (strcmp(field_signature, "[F") == 0) {
1140           value = oopFactory::new_floatArray(length, CHECK_(true));
1141         } else if (strcmp(field_signature, "[D") == 0) {
1142           value = oopFactory::new_doubleArray(length, CHECK_(true));
1143         } else if (strcmp(field_signature, "[I") == 0) {
1144           value = oopFactory::new_intArray(length, CHECK_(true));
1145         } else if (strcmp(field_signature, "[J") == 0) {
1146           value = oopFactory::new_longArray(length, CHECK_(true));
1147         } else if (field_signature[0] == JVM_SIGNATURE_ARRAY &&
1148                    field_signature[1] == JVM_SIGNATURE_CLASS) {
1149           Klass* kelem = resolve_klass(field_signature + 1, CHECK_(true));
1150           value = oopFactory::new_objArray(kelem, length, CHECK_(true));
1151         } else if (field_signature[0] == JVM_SIGNATURE_ARRAY &&
1152                    field_signature[1] == JVM_SIGNATURE_PRIMITIVE_OBJECT) {
1153           Klass* kelem = resolve_klass(field_signature + 1, CHECK_(true));
1154           value = oopFactory::new_valueArray(kelem, length, CHECK_(true));
1155         } else {
1156           report_error("unhandled array staticfield");
1157         }
1158       }
1159       java_mirror->obj_field_put(fd->offset(), value);
1160       return true;
1161     } else if (strcmp(field_signature, "Ljava/lang/String;") == 0) {
1162       const char* string_value = parse_escaped_string();
1163       Handle value = java_lang_String::create_from_str(string_value, CHECK_(true));
1164       java_mirror->obj_field_put(fd->offset(), value());
1165       return true;
1166     } else if (field_signature[0] == 'L') {
1167       const char* instance = parse_escaped_string();
1168       Klass* k = resolve_klass(instance, CHECK_(true));
1169       oop value = InstanceKlass::cast(k)->allocate_instance(CHECK_(true));
1170       java_mirror->obj_field_put(fd->offset(), value);
1171       return true;
1172     }
1173     return false;
1174   }
1175 
1176   // Initialize a class and fill in the value for a static field.
1177   // This is useful when the compile was dependent on the value of
1178   // static fields but it's impossible to properly rerun the static
1179   // initializer.
1180   void process_staticfield(TRAPS) {
1181     InstanceKlass* k = (InstanceKlass *)parse_klass(CHECK);
1182 
1183     if (k == NULL || ReplaySuppressInitializers == 0 ||
1184         (ReplaySuppressInitializers == 2 && k->class_loader() == NULL)) {
1185         skip_remaining();
1186       return;
1187     }
1188 
1189     assert(k->is_initialized(), "must be");
1190 
1191     const char* field_name = parse_escaped_string();
1192     const char* field_signature = parse_string();
1193     fieldDescriptor fd;
1194     Symbol* name = SymbolTable::new_symbol(field_name);
1195     Symbol* sig = SymbolTable::new_symbol(field_signature);
1196     if (!k->find_local_field(name, sig, &fd) ||
1197         !fd.is_static() ||
1198         fd.has_initial_value()) {
1199       report_error(field_name);
1200       return;
1201     }
1202 
1203     oop java_mirror = k->java_mirror();
1204     if (strcmp(field_signature, "I") == 0) {
1205       const char* string_value = parse_escaped_string();
1206       int value = atoi(string_value);
1207       java_mirror->int_field_put(fd.offset(), value);
1208     } else if (strcmp(field_signature, "B") == 0) {
1209       const char* string_value = parse_escaped_string();
1210       int value = atoi(string_value);
1211       java_mirror->byte_field_put(fd.offset(), value);
1212     } else if (strcmp(field_signature, "C") == 0) {
1213       const char* string_value = parse_escaped_string();
1214       int value = atoi(string_value);
1215       java_mirror->char_field_put(fd.offset(), value);
1216     } else if (strcmp(field_signature, "S") == 0) {
1217       const char* string_value = parse_escaped_string();
1218       int value = atoi(string_value);
1219       java_mirror->short_field_put(fd.offset(), value);
1220     } else if (strcmp(field_signature, "Z") == 0) {
1221       const char* string_value = parse_escaped_string();
1222       int value = atoi(string_value);
1223       java_mirror->bool_field_put(fd.offset(), value);
1224     } else if (strcmp(field_signature, "J") == 0) {
1225       const char* string_value = parse_escaped_string();
1226       jlong value;
1227       if (sscanf(string_value, JLONG_FORMAT, &value) != 1) {
1228         fprintf(stderr, "Error parsing long: %s\n", string_value);
1229         return;
1230       }
1231       java_mirror->long_field_put(fd.offset(), value);
1232     } else if (strcmp(field_signature, "F") == 0) {
1233       const char* string_value = parse_escaped_string();
1234       float value = atof(string_value);
1235       java_mirror->float_field_put(fd.offset(), value);
1236     } else if (strcmp(field_signature, "D") == 0) {
1237       const char* string_value = parse_escaped_string();
1238       double value = atof(string_value);
1239       java_mirror->double_field_put(fd.offset(), value);
1240     } else if (field_signature[0] == JVM_SIGNATURE_PRIMITIVE_OBJECT) {
1241       Klass* kelem = resolve_klass(field_signature, CHECK);
1242       InlineKlass* vk = InlineKlass::cast(kelem);
1243       oop value = vk->allocate_instance(CHECK);
1244       InlineTypeFieldInitializer init_fields(value, this);
1245       vk->do_nonstatic_fields(&init_fields);
1246       java_mirror->obj_field_put(fd.offset(), value);
1247     } else {
1248       bool res = process_staticfield_reference(field_signature, java_mirror, &fd, CHECK);
1249       if (!res)  {
1250         report_error("unhandled staticfield");
1251       }
1252     }
1253   }
1254 
1255 #if INCLUDE_JVMTI
1256   // JvmtiExport <field> <value>
1257   void process_JvmtiExport(TRAPS) {
1258     const char* field = parse_string();
1259     bool value = parse_int("JvmtiExport flag") != 0;
1260     if (strcmp(field, "can_access_local_variables") == 0) {
1261       JvmtiExport::set_can_access_local_variables(value);
1262     } else if (strcmp(field, "can_hotswap_or_post_breakpoint") == 0) {
1263       JvmtiExport::set_can_hotswap_or_post_breakpoint(value);
1264     } else if (strcmp(field, "can_post_on_exceptions") == 0) {
1265       JvmtiExport::set_can_post_on_exceptions(value);
1266     } else {
1267       report_error("Unrecognized JvmtiExport directive");
1268     }
1269   }
1270 #endif // INCLUDE_JVMTI
1271 
1272   // Create and initialize a record for a ciMethod
1273   ciMethodRecord* new_ciMethod(Method* method) {
1274     ciMethodRecord* rec = NEW_RESOURCE_OBJ(ciMethodRecord);
1275     rec->_klass_name =  method->method_holder()->name()->as_utf8();
1276     rec->_method_name = method->name()->as_utf8();
1277     rec->_signature = method->signature()->as_utf8();
1278     _ci_method_records.append(rec);
1279     return rec;
1280   }
1281 
1282   // Lookup data for a ciMethod
1283   ciMethodRecord* find_ciMethodRecord(Method* method) {
1284     const char* klass_name =  method->method_holder()->name()->as_utf8();
1285     const char* method_name = method->name()->as_utf8();
1286     const char* signature = method->signature()->as_utf8();
1287     for (int i = 0; i < _ci_method_records.length(); i++) {
1288       ciMethodRecord* rec = _ci_method_records.at(i);
1289       if (strcmp(rec->_klass_name, klass_name) == 0 &&
1290           strcmp(rec->_method_name, method_name) == 0 &&
1291           strcmp(rec->_signature, signature) == 0) {
1292         return rec;
1293       }
1294     }
1295     return NULL;
1296   }
1297 
1298   // Create and initialize a record for a ciInstanceKlass which was present at replay dump time.
1299   void new_ciInstanceKlass(const InstanceKlass* klass) {
1300     ciInstanceKlassRecord* rec = NEW_RESOURCE_OBJ(ciInstanceKlassRecord);
1301     rec->_klass = klass;
1302     oop java_mirror = klass->java_mirror();
1303     Handle h_java_mirror(_thread, java_mirror);
1304     rec->_java_mirror = JNIHandles::make_global(h_java_mirror);
1305     _ci_instance_klass_records.append(rec);
1306   }
1307 
1308   // Check if a ciInstanceKlass was present at replay dump time for a klass.
1309   ciInstanceKlassRecord* find_ciInstanceKlass(const InstanceKlass* klass) {
1310     for (int i = 0; i < _ci_instance_klass_records.length(); i++) {
1311       ciInstanceKlassRecord* rec = _ci_instance_klass_records.at(i);
1312       if (klass == rec->_klass) {
1313         // ciInstanceKlass for this klass was resolved.
1314         return rec;
1315       }
1316     }
1317     return NULL;
1318   }
1319 
1320   // Create and initialize a record for a ciMethodData
1321   ciMethodDataRecord* new_ciMethodData(Method* method) {
1322     ciMethodDataRecord* rec = NEW_RESOURCE_OBJ(ciMethodDataRecord);
1323     rec->_klass_name =  method->method_holder()->name()->as_utf8();
1324     rec->_method_name = method->name()->as_utf8();
1325     rec->_signature = method->signature()->as_utf8();
1326     _ci_method_data_records.append(rec);
1327     return rec;
1328   }
1329 
1330   // Lookup data for a ciMethodData
1331   ciMethodDataRecord* find_ciMethodDataRecord(Method* method) {
1332     const char* klass_name =  method->method_holder()->name()->as_utf8();
1333     const char* method_name = method->name()->as_utf8();
1334     const char* signature = method->signature()->as_utf8();
1335     for (int i = 0; i < _ci_method_data_records.length(); i++) {
1336       ciMethodDataRecord* rec = _ci_method_data_records.at(i);
1337       if (strcmp(rec->_klass_name, klass_name) == 0 &&
1338           strcmp(rec->_method_name, method_name) == 0 &&
1339           strcmp(rec->_signature, signature) == 0) {
1340         return rec;
1341       }
1342     }
1343     return NULL;
1344   }
1345 
1346   // Create and initialize a record for a ciInlineRecord
1347   ciInlineRecord* new_ciInlineRecord(Method* method, int bci, int depth, int inline_late) {
1348     ciInlineRecord* rec = NEW_RESOURCE_OBJ(ciInlineRecord);
1349     rec->_klass_name =  method->method_holder()->name()->as_utf8();
1350     rec->_method_name = method->name()->as_utf8();
1351     rec->_signature = method->signature()->as_utf8();
1352     rec->_inline_bci = bci;
1353     rec->_inline_depth = depth;
1354     rec->_inline_late = inline_late;
1355     _ci_inline_records->append(rec);
1356     return rec;
1357   }
1358 
1359   // Lookup inlining data for a ciMethod
1360   ciInlineRecord* find_ciInlineRecord(Method* method, int bci, int depth) {
1361     if (_ci_inline_records != NULL) {
1362       return find_ciInlineRecord(_ci_inline_records, method, bci, depth);
1363     }
1364     return NULL;
1365   }
1366 
1367   static ciInlineRecord* find_ciInlineRecord(GrowableArray<ciInlineRecord*>*  records,
1368                                       Method* method, int bci, int depth) {
1369     if (records != NULL) {
1370       const char* klass_name  = method->method_holder()->name()->as_utf8();
1371       const char* method_name = method->name()->as_utf8();
1372       const char* signature   = method->signature()->as_utf8();
1373       for (int i = 0; i < records->length(); i++) {
1374         ciInlineRecord* rec = records->at(i);
1375         if ((rec->_inline_bci == bci) &&
1376             (rec->_inline_depth == depth) &&
1377             (strcmp(rec->_klass_name, klass_name) == 0) &&
1378             (strcmp(rec->_method_name, method_name) == 0) &&
1379             (strcmp(rec->_signature, signature) == 0)) {
1380           return rec;
1381         }
1382       }
1383     }
1384     return NULL;
1385   }
1386 
1387   const char* error_message() {
1388     return _error_message;
1389   }
1390 
1391   void reset() {
1392     _error_message = NULL;
1393     _ci_method_records.clear();
1394     _ci_method_data_records.clear();
1395   }
1396 
1397   // Take an ascii string contain \u#### escapes and convert it to utf8
1398   // in place.
1399   static void unescape_string(char* value) {
1400     char* from = value;
1401     char* to = value;
1402     while (*from != '\0') {
1403       if (*from != '\\') {
1404         *from++ = *to++;
1405       } else {
1406         switch (from[1]) {
1407           case 'u': {
1408             from += 2;
1409             jchar value=0;
1410             for (int i=0; i<4; i++) {
1411               char c = *from++;
1412               switch (c) {
1413                 case '0': case '1': case '2': case '3': case '4':
1414                 case '5': case '6': case '7': case '8': case '9':
1415                   value = (value << 4) + c - '0';
1416                   break;
1417                 case 'a': case 'b': case 'c':
1418                 case 'd': case 'e': case 'f':
1419                   value = (value << 4) + 10 + c - 'a';
1420                   break;
1421                 case 'A': case 'B': case 'C':
1422                 case 'D': case 'E': case 'F':
1423                   value = (value << 4) + 10 + c - 'A';
1424                   break;
1425                 default:
1426                   ShouldNotReachHere();
1427               }
1428             }
1429             UNICODE::convert_to_utf8(&value, 1, to);
1430             to++;
1431             break;
1432           }
1433           case 't': *to++ = '\t'; from += 2; break;
1434           case 'n': *to++ = '\n'; from += 2; break;
1435           case 'r': *to++ = '\r'; from += 2; break;
1436           case 'f': *to++ = '\f'; from += 2; break;
1437           default:
1438             ShouldNotReachHere();
1439         }
1440       }
1441     }
1442     *from = *to;
1443   }
1444 };
1445 
1446 void ciReplay::replay(TRAPS) {
1447   int exit_code = replay_impl(THREAD);
1448 
1449   Threads::destroy_vm();
1450 
1451   vm_exit(exit_code);
1452 }
1453 
1454 bool ciReplay::no_replay_state() {
1455   return replay_state == NULL;
1456 }
1457 
1458 void* ciReplay::load_inline_data(ciMethod* method, int entry_bci, int comp_level) {
1459   if (FLAG_IS_DEFAULT(InlineDataFile)) {
1460     tty->print_cr("ERROR: no inline replay data file specified (use -XX:InlineDataFile=inline_pid12345.txt).");
1461     return NULL;
1462   }
1463 
1464   VM_ENTRY_MARK;
1465   // Load and parse the replay data
1466   CompileReplay rp(InlineDataFile, THREAD);
1467   if (!rp.can_replay()) {
1468     tty->print_cr("ciReplay: !rp.can_replay()");
1469     return NULL;
1470   }
1471   void* data = rp.process_inline(method, method->get_Method(), entry_bci, comp_level, THREAD);
1472   if (HAS_PENDING_EXCEPTION) {
1473     Handle throwable(THREAD, PENDING_EXCEPTION);
1474     CLEAR_PENDING_EXCEPTION;
1475     java_lang_Throwable::print_stack_trace(throwable, tty);
1476     tty->cr();
1477     return NULL;
1478   }
1479 
1480   if (rp.had_error()) {
1481     tty->print_cr("ciReplay: Failed on %s", rp.error_message());
1482     return NULL;
1483   }
1484   return data;
1485 }
1486 
1487 int ciReplay::replay_impl(TRAPS) {
1488   HandleMark hm(THREAD);
1489   ResourceMark rm(THREAD);
1490 
1491   if (ReplaySuppressInitializers > 2) {
1492     // ReplaySuppressInitializers > 2 means that we want to allow
1493     // normal VM bootstrap but once we get into the replay itself
1494     // don't allow any initializers to be run.
1495     ReplaySuppressInitializers = 1;
1496   }
1497 
1498   if (FLAG_IS_DEFAULT(ReplayDataFile)) {
1499     tty->print_cr("ERROR: no compiler replay data file specified (use -XX:ReplayDataFile=replay_pid12345.txt).");
1500     return 1;
1501   }
1502 
1503   // Load and parse the replay data
1504   CompileReplay rp(ReplayDataFile, THREAD);
1505   int exit_code = 0;
1506   if (rp.can_replay()) {
1507     rp.process(THREAD);
1508   } else {
1509     exit_code = 1;
1510     return exit_code;
1511   }
1512 
1513   if (HAS_PENDING_EXCEPTION) {
1514     Handle throwable(THREAD, PENDING_EXCEPTION);
1515     CLEAR_PENDING_EXCEPTION;
1516     java_lang_Throwable::print_stack_trace(throwable, tty);
1517     tty->cr();
1518     exit_code = 2;
1519   }
1520 
1521   if (rp.had_error()) {
1522     tty->print_cr("Failed on %s", rp.error_message());
1523     exit_code = 1;
1524   }
1525   return exit_code;
1526 }
1527 
1528 void ciReplay::initialize(ciMethodData* m) {
1529   if (no_replay_state()) {
1530     return;
1531   }
1532 
1533   ASSERT_IN_VM;
1534   ResourceMark rm;
1535 
1536   Method* method = m->get_MethodData()->method();
1537   ciMethodDataRecord* rec = replay_state->find_ciMethodDataRecord(method);
1538   if (rec == NULL) {
1539     // This indicates some mismatch with the original environment and
1540     // the replay environment though it's not always enough to
1541     // interfere with reproducing a bug
1542     tty->print_cr("Warning: requesting ciMethodData record for method with no data: ");
1543     method->print_name(tty);
1544     tty->cr();
1545   } else {
1546     m->_state = rec->_state;
1547     m->_invocation_counter = rec->_invocation_counter;
1548     if (rec->_data_length != 0) {
1549       assert(m->_data_size + m->_extra_data_size == rec->_data_length * (int)sizeof(rec->_data[0]) ||
1550              m->_data_size == rec->_data_length * (int)sizeof(rec->_data[0]), "must agree");
1551 
1552       // Write the correct ciObjects back into the profile data
1553       ciEnv* env = ciEnv::current();
1554       for (int i = 0; i < rec->_classes_length; i++) {
1555         Klass *k = rec->_classes[i];
1556         // In case this class pointer is is tagged, preserve the tag bits
1557         intptr_t status = 0;
1558         if (k != NULL) {
1559           status = ciTypeEntries::with_status(env->get_metadata(k)->as_klass(), rec->_data[rec->_classes_offsets[i]]);
1560         }
1561         rec->_data[rec->_classes_offsets[i]] = status;
1562       }
1563       for (int i = 0; i < rec->_methods_length; i++) {
1564         Method *m = rec->_methods[i];
1565         *(ciMetadata**)(rec->_data + rec->_methods_offsets[i]) =
1566           env->get_metadata(m);
1567       }
1568       // Copy the updated profile data into place as intptr_ts
1569 #ifdef _LP64
1570       Copy::conjoint_jlongs_atomic((jlong *)rec->_data, (jlong *)m->_data, rec->_data_length);
1571 #else
1572       Copy::conjoint_jints_atomic((jint *)rec->_data, (jint *)m->_data, rec->_data_length);
1573 #endif
1574     }
1575 
1576     // copy in the original header
1577     Copy::conjoint_jbytes(rec->_orig_data, (char*)&m->_orig, rec->_orig_data_length);
1578   }
1579 }
1580 
1581 
1582 bool ciReplay::should_not_inline(ciMethod* method) {
1583   if (no_replay_state()) {
1584     return false;
1585   }
1586   VM_ENTRY_MARK;
1587   // ciMethod without a record shouldn't be inlined.
1588   return replay_state->find_ciMethodRecord(method->get_Method()) == NULL;
1589 }
1590 
1591 bool ciReplay::should_inline(void* data, ciMethod* method, int bci, int inline_depth, bool& should_delay) {
1592   if (data != NULL) {
1593     GrowableArray<ciInlineRecord*>* records = (GrowableArray<ciInlineRecord*>*)data;
1594     VM_ENTRY_MARK;
1595     // Inline record are ordered by bci and depth.
1596     ciInlineRecord* record = CompileReplay::find_ciInlineRecord(records, method->get_Method(), bci, inline_depth);
1597     if (record == NULL) {
1598       return false;
1599     }
1600     should_delay = record->_inline_late;
1601     return true;
1602   } else if (replay_state != NULL) {
1603     VM_ENTRY_MARK;
1604     // Inline record are ordered by bci and depth.
1605     ciInlineRecord* record = replay_state->find_ciInlineRecord(method->get_Method(), bci, inline_depth);
1606     if (record == NULL) {
1607       return false;
1608     }
1609     should_delay = record->_inline_late;
1610     return true;
1611   }
1612   return false;
1613 }
1614 
1615 bool ciReplay::should_not_inline(void* data, ciMethod* method, int bci, int inline_depth) {
1616   if (data != NULL) {
1617     GrowableArray<ciInlineRecord*>* records = (GrowableArray<ciInlineRecord*>*)data;
1618     VM_ENTRY_MARK;
1619     // Inline record are ordered by bci and depth.
1620     return CompileReplay::find_ciInlineRecord(records, method->get_Method(), bci, inline_depth) == NULL;
1621   } else if (replay_state != NULL) {
1622     VM_ENTRY_MARK;
1623     // Inline record are ordered by bci and depth.
1624     return replay_state->find_ciInlineRecord(method->get_Method(), bci, inline_depth) == NULL;
1625   }
1626   return false;
1627 }
1628 
1629 void ciReplay::initialize(ciMethod* m) {
1630   if (no_replay_state()) {
1631     return;
1632   }
1633 
1634   ASSERT_IN_VM;
1635   ResourceMark rm;
1636 
1637   Method* method = m->get_Method();
1638   ciMethodRecord* rec = replay_state->find_ciMethodRecord(method);
1639   if (rec == NULL) {
1640     // This indicates some mismatch with the original environment and
1641     // the replay environment though it's not always enough to
1642     // interfere with reproducing a bug
1643     tty->print_cr("Warning: requesting ciMethod record for method with no data: ");
1644     method->print_name(tty);
1645     tty->cr();
1646   } else {
1647     EXCEPTION_CONTEXT;
1648     // m->_instructions_size = rec->_instructions_size;
1649     m->_instructions_size = -1;
1650     m->_interpreter_invocation_count = rec->_interpreter_invocation_count;
1651     m->_interpreter_throwout_count = rec->_interpreter_throwout_count;
1652     MethodCounters* mcs = method->get_method_counters(CHECK_AND_CLEAR);
1653     guarantee(mcs != NULL, "method counters allocation failed");
1654     mcs->invocation_counter()->_counter = rec->_invocation_counter;
1655     mcs->backedge_counter()->_counter = rec->_backedge_counter;
1656   }
1657 }
1658 
1659 void ciReplay::initialize(ciInstanceKlass* ci_ik, InstanceKlass* ik) {
1660   assert(!no_replay_state(), "must have replay state");
1661 
1662   ASSERT_IN_VM;
1663   ciInstanceKlassRecord* rec = replay_state->find_ciInstanceKlass(ik);
1664   assert(rec != NULL, "ciInstanceKlass must be whitelisted");
1665   ci_ik->_java_mirror = CURRENT_ENV->get_instance(JNIHandles::resolve(rec->_java_mirror));
1666 }
1667 
1668 bool ciReplay::is_loaded(Method* method) {
1669   if (no_replay_state()) {
1670     return true;
1671   }
1672 
1673   ASSERT_IN_VM;
1674   ResourceMark rm;
1675 
1676   ciMethodRecord* rec = replay_state->find_ciMethodRecord(method);
1677   return rec != NULL;
1678 }
1679 
1680 bool ciReplay::is_klass_unresolved(const InstanceKlass* klass) {
1681   if (no_replay_state()) {
1682     return false;
1683   }
1684 
1685   // Check if klass is found on whitelist.
1686   ciInstanceKlassRecord* rec = replay_state->find_ciInstanceKlass(klass);
1687   return rec == NULL;
1688 }
1689 
1690 oop ciReplay::obj_field(oop obj, Symbol* name) {
1691   InstanceKlass* ik = InstanceKlass::cast(obj->klass());
1692 
1693   do {
1694     if (!ik->has_nonstatic_fields()) {
1695       ik = ik->java_super();
1696       continue;
1697     }
1698 
1699     for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
1700       if (fs.access_flags().is_static()) {
1701         continue;
1702       }
1703       if (fs.name() == name) {
1704         int offset = fs.offset();
1705 #ifdef ASSERT
1706         fieldDescriptor fd = fs.field_descriptor();
1707         assert(fd.offset() == ik->field_offset(fd.index()), "!");
1708 #endif
1709         oop f = obj->obj_field(offset);
1710         return f;
1711       }
1712     }
1713 
1714     ik = ik->java_super();
1715   } while (ik != NULL);
1716   return NULL;
1717 }
1718 
1719 oop ciReplay::obj_field(oop obj, const char *name) {
1720   Symbol* fname = SymbolTable::probe(name, (int)strlen(name));
1721   if (fname == NULL) {
1722     return NULL;
1723   }
1724   return obj_field(obj, fname);
1725 }