1 /* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
   2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 #include "precompiled.hpp"
  25 #include "ci/ciMethodData.hpp"
  26 #include "ci/ciReplay.hpp"
  27 #include "ci/ciUtilities.hpp"
  28 #include "compiler/compileBroker.hpp"
  29 #include "memory/allocation.inline.hpp"
  30 #include "memory/oopFactory.hpp"
  31 #include "memory/resourceArea.hpp"
  32 #include "utilities/copy.hpp"
  33 #include "utilities/macros.hpp"
  34 
  35 #ifndef PRODUCT
  36 
  37 // ciReplay
  38 
  39 typedef struct _ciMethodDataRecord {
  40   const char* klass;
  41   const char* method;
  42   const char* signature;
  43   int state;
  44   int current_mileage;
  45   intptr_t* data;
  46   int data_length;
  47   char* orig_data;
  48   int orig_data_length;
  49   int oops_length;
  50   jobject* oops_handles;
  51   int* oops_offsets;
  52 } ciMethodDataRecord;
  53 
  54 typedef struct _ciMethodRecord {
  55   const char* klass;
  56   const char* method;
  57   const char* signature;
  58   int instructions_size;
  59   int interpreter_invocation_count;
  60   int interpreter_throwout_count;
  61   int invocation_counter;
  62   int backedge_counter;
  63 } ciMethodRecord;
  64 
  65 class CompileReplay;
  66 static CompileReplay* replay_state;
  67 
  68 class CompileReplay : public StackObj {
  69  private:
  70   FILE*   stream;
  71   Thread* thread;
  72   Handle  protection_domain;
  73   Handle  loader;
  74 
  75   GrowableArray<ciMethodRecord*>     ci_method_records;
  76   GrowableArray<ciMethodDataRecord*> ci_method_data_records;
  77 
  78   const char* _error_message;
  79 
  80   char* bufptr;
  81   char* buffer;
  82   int   buffer_length;
  83   int   buffer_end;
  84   int   line_no;
  85 
  86  public:
  87   CompileReplay(const char* filename, TRAPS) {
  88     thread = THREAD;
  89     loader = Handle(thread, SystemDictionary::java_system_loader());
  90     stream = fopen(filename, "rt");
  91     if (stream == NULL) {
  92       fprintf(stderr, "ERROR: Can't open replay file %s\n", filename);
  93     }
  94     buffer_length = 32;
  95     buffer = NEW_RESOURCE_ARRAY(char, buffer_length);
  96     _error_message = NULL;
  97 
  98     test();
  99   }
 100 
 101   ~CompileReplay() {
 102     if (stream != NULL) fclose(stream);
 103   }
 104 
 105   void test() {
 106     strcpy(buffer, "1 2 foo 4 bar 0x9 \"this is it\"");
 107     bufptr = buffer;
 108     assert(parse_int("test") == 1, "what");
 109     assert(parse_int("test") == 2, "what");
 110     assert(strcmp(parse_string(), "foo") == 0, "what");
 111     assert(parse_int("test") == 4, "what");
 112     assert(strcmp(parse_string(), "bar") == 0, "what");
 113     assert(parse_intptr_t("test") == 9, "what");
 114     assert(strcmp(parse_quoted_string(), "this is it") == 0, "what");
 115   }
 116 
 117   bool had_error() {
 118     return _error_message != NULL || thread->has_pending_exception();
 119   }
 120 
 121   bool can_replay() {
 122     return !(stream == NULL || had_error());
 123   }
 124 
 125   void report_error(const char* msg) {
 126     _error_message = msg;
 127     // Restore the buffer contents for error reporting
 128     for (int i = 0; i < buffer_end; i++) {
 129       if (buffer[i] == '\0') buffer[i] = ' ';
 130     }
 131   }
 132 
 133   int parse_int(const char* label) {
 134     if (had_error()) {
 135       return 0;
 136     }
 137 
 138     int v = 0;
 139     int read;
 140     if (sscanf(bufptr, "%i%n", &v, &read) != 1) {
 141       report_error(label);
 142     } else {
 143       bufptr += read;
 144     }
 145     return v;
 146   }
 147 
 148   intptr_t parse_intptr_t(const char* label) {
 149     if (had_error()) {
 150       return 0;
 151     }
 152 
 153     intptr_t v = 0;
 154     int read;
 155     if (sscanf(bufptr, INTPTR_FORMAT "%n", &v, &read) != 1) {
 156       report_error(label);
 157     } else {
 158       bufptr += read;
 159     }
 160     return v;
 161   }
 162 
 163   void skip_ws() {
 164     // Skip any leading whitespace
 165     while (*bufptr == ' ' || *bufptr == '\t') {
 166       bufptr++;
 167     }
 168   }
 169 
 170 
 171   char* scan_and_terminate(char delim) {
 172     char* str = bufptr;
 173     while (*bufptr != delim && *bufptr != '\0') {
 174       bufptr++;
 175     }
 176     if (*bufptr != '\0') {
 177       *bufptr++ = '\0';
 178     }
 179     if (bufptr == str) {
 180       // nothing here
 181       return NULL;
 182     }
 183     return str;
 184   }
 185 
 186   char* parse_string() {
 187     if (had_error()) return NULL;
 188 
 189     skip_ws();
 190     return scan_and_terminate(' ');
 191   }
 192 
 193   char* parse_quoted_string() {
 194     if (had_error()) return NULL;
 195 
 196     skip_ws();
 197 
 198     if (*bufptr == '"') {
 199       bufptr++;
 200       return scan_and_terminate('"');
 201     } else {
 202       return scan_and_terminate(' ');
 203     }
 204   }
 205 
 206   const char* parse_escaped_string() {
 207     char* result = parse_quoted_string();
 208     if (result != NULL) {
 209       unescape_string(result);
 210     }
 211     return result;
 212   }
 213 
 214   // Look for the tag 'tag' followed by an
 215   bool parse_tag_and_count(const char* tag, int& length) {
 216     const char* t = parse_string();
 217     if (t == NULL) {
 218       return false;
 219     }
 220 
 221     if (strcmp(tag, t) != 0) {
 222       report_error(tag);
 223       return false;
 224     }
 225     length = parse_int("parse_tag_and_count");
 226     return !had_error();
 227   }
 228 
 229   // Parse a sequence of raw data encoded as bytes and return the
 230   // resulting data.
 231   char* parse_data(const char* tag, int& length) {
 232     if (!parse_tag_and_count(tag, length)) {
 233       return NULL;
 234     }
 235 
 236     char * result = NEW_RESOURCE_ARRAY(char, length);
 237     for (int i = 0; i < length; i++) {
 238       int val = parse_int("data");
 239       result[i] = val;
 240     }
 241     return result;
 242   }
 243 
 244   // Parse a standard chunk of data emitted as:
 245   //   'tag' <length> # # ...
 246   // Where each # is an intptr_t item
 247   intptr_t* parse_intptr_data(const char* tag, int& length) {
 248     if (!parse_tag_and_count(tag, length)) {
 249       return NULL;
 250     }
 251 
 252     intptr_t* result = NEW_RESOURCE_ARRAY(intptr_t, length);
 253     for (int i = 0; i < length; i++) {
 254       skip_ws();
 255       intptr_t val = parse_intptr_t("data");
 256       result[i] = val;
 257     }
 258     return result;
 259   }
 260 
 261   // Parse a possibly quoted version of a symbol into a symbolOop
 262   Symbol* parse_symbol(TRAPS) {
 263     const char* str = parse_escaped_string();
 264     if (str != NULL) {
 265       Symbol* sym = SymbolTable::lookup(str, (int)strlen(str), CHECK_NULL);
 266       return sym;
 267     }
 268     return NULL;
 269   }
 270 
 271   // Parse a valid klass name and look it up
 272   Klass* parse_klass(TRAPS) {
 273     const char* str = parse_escaped_string();
 274     Symbol* klass_name = SymbolTable::lookup(str, (int)strlen(str), CHECK_NULL);
 275     if (klass_name != NULL) {
 276       Klass* k = SystemDictionary::resolve_or_fail(klass_name, loader, protection_domain, true, THREAD);
 277       if (HAS_PENDING_EXCEPTION) {
 278         oop throwable = PENDING_EXCEPTION;
 279         java_lang_Throwable::print(throwable, tty);
 280         tty->cr();
 281         report_error(str);
 282         return NULL;
 283       }
 284       return k;
 285     }
 286     return NULL;
 287   }
 288 
 289   // Lookup a klass
 290   Klass* resolve_klass(const char* klass, TRAPS) {
 291     Symbol* klass_name = SymbolTable::lookup(klass, (int)strlen(klass), CHECK_NULL);
 292     return SystemDictionary::resolve_or_fail(klass_name, loader, protection_domain, true, CHECK_NULL);
 293   }
 294 
 295   // Parse the standard tuple of <klass> <name> <signature>
 296   Method* parse_method(TRAPS) {
 297     InstanceKlass* k = (InstanceKlass*)parse_klass(CHECK_NULL);
 298     Symbol* method_name = parse_symbol(CHECK_NULL);
 299     Symbol* method_signature = parse_symbol(CHECK_NULL);
 300     Method* m = k->find_method(method_name, method_signature);
 301     if (m == NULL) {
 302       report_error("Can't find method");
 303     }
 304     return m;
 305   }
 306 
 307   // Process each line of the replay file executing each command until
 308   // the file ends.
 309   void process(TRAPS) {
 310     line_no = 1;
 311     int pos = 0;
 312     int c = getc(stream);
 313     while(c != EOF) {
 314       if (pos + 1 >= buffer_length) {
 315         int newl = buffer_length * 2;
 316         char* newb = NEW_RESOURCE_ARRAY(char, newl);
 317         memcpy(newb, buffer, pos);
 318         buffer = newb;
 319         buffer_length = newl;
 320       }
 321       if (c == '\n') {
 322         // null terminate it, reset the pointer and process the line
 323         buffer[pos] = '\0';
 324         buffer_end = pos++;
 325         bufptr = buffer;
 326         process_command(CHECK);
 327         if (had_error()) {
 328           tty->print_cr("Error while parsing line %d: %s\n", line_no, _error_message);
 329           tty->print_cr("%s", buffer);
 330           return;
 331         }
 332         pos = 0;
 333         buffer_end = 0;
 334         line_no++;
 335       } else if (c == '\r') {
 336         // skip LF
 337       } else {
 338         buffer[pos++] = c;
 339       }
 340       c = getc(stream);
 341     }
 342   }
 343 
 344   void process_command(TRAPS) {
 345     char* cmd = parse_string();
 346     if (cmd == NULL) {
 347       return;
 348     }
 349     if (strcmp("#", cmd) == 0) {
 350       // ignore
 351     } else if (strcmp("compile", cmd) == 0) {
 352       process_compile(CHECK);
 353     } else if (strcmp("ciMethod", cmd) == 0) {
 354       process_ciMethod(CHECK);
 355     } else if (strcmp("ciMethodData", cmd) == 0) {
 356       process_ciMethodData(CHECK);
 357     } else if (strcmp("staticfield", cmd) == 0) {
 358       process_staticfield(CHECK);
 359     } else if (strcmp("ciInstanceKlass", cmd) == 0) {
 360       process_ciInstanceKlass(CHECK);
 361     } else if (strcmp("instanceKlass", cmd) == 0) {
 362       process_instanceKlass(CHECK);
 363 #if INCLUDE_JVMTI
 364     } else if (strcmp("JvmtiExport", cmd) == 0) {
 365       process_JvmtiExport(CHECK);
 366 #endif // INCLUDE_JVMTI
 367     } else {
 368       report_error("unknown command");
 369     }
 370   }
 371 
 372   // validation of comp_level
 373   bool is_valid_comp_level(int comp_level) {
 374     const int msg_len = 256;
 375     char* msg = NULL;
 376     if (!is_compile(comp_level)) {
 377       msg = NEW_RESOURCE_ARRAY(char, msg_len);
 378       jio_snprintf(msg, msg_len, "%d isn't compilation level", comp_level);
 379     } else if (!TieredCompilation && (comp_level != CompLevel_highest_tier)) {
 380       msg = NEW_RESOURCE_ARRAY(char, msg_len);
 381       switch (comp_level) {
 382         case CompLevel_simple:
 383           jio_snprintf(msg, msg_len, "compilation level %d requires Client VM or TieredCompilation", comp_level);
 384           break;
 385         case CompLevel_full_optimization:
 386           jio_snprintf(msg, msg_len, "compilation level %d requires Server VM", comp_level);
 387           break;
 388         default:
 389           jio_snprintf(msg, msg_len, "compilation level %d requires TieredCompilation", comp_level);
 390       }
 391     }
 392     if (msg != NULL) {
 393       report_error(msg);
 394       return false;
 395     }
 396     return true;
 397   }
 398 
 399   // compile <klass> <name> <signature> <entry_bci> <comp_level>
 400   void process_compile(TRAPS) {
 401     Method* method = parse_method(CHECK);
 402     if (had_error()) return;
 403     int entry_bci = parse_int("entry_bci");
 404     const char* comp_level_label = "comp_level";
 405     int comp_level = parse_int(comp_level_label);
 406     // old version w/o comp_level
 407     if (had_error() && (error_message() == comp_level_label)) {
 408       comp_level = CompLevel_full_optimization;
 409     }
 410     if (!is_valid_comp_level(comp_level)) {
 411       return;
 412     }
 413     Klass* k = method->method_holder();
 414     ((InstanceKlass*)k)->initialize(THREAD);
 415     if (HAS_PENDING_EXCEPTION) {
 416       oop throwable = PENDING_EXCEPTION;
 417       java_lang_Throwable::print(throwable, tty);
 418       tty->cr();
 419       if (ReplayIgnoreInitErrors) {
 420         CLEAR_PENDING_EXCEPTION;
 421         ((InstanceKlass*)k)->set_init_state(InstanceKlass::fully_initialized);
 422       } else {
 423         return;
 424       }
 425     }
 426     // Make sure the existence of a prior compile doesn't stop this one
 427     nmethod* nm = (entry_bci != InvocationEntryBci) ? method->lookup_osr_nmethod_for(entry_bci, comp_level, true) : method->code();
 428     if (nm != NULL) {
 429       nm->make_not_entrant();
 430     }
 431     replay_state = this;
 432     CompileBroker::compile_method(method, entry_bci, comp_level,
 433                                   methodHandle(), 0, "replay", THREAD);
 434     replay_state = NULL;
 435     reset();
 436   }
 437 
 438   // ciMethod <klass> <name> <signature> <invocation_counter> <backedge_counter> <interpreter_invocation_count> <interpreter_throwout_count> <instructions_size>
 439   //
 440   //
 441   void process_ciMethod(TRAPS) {
 442     Method* method = parse_method(CHECK);
 443     if (had_error()) return;
 444     ciMethodRecord* rec = new_ciMethod(method);
 445     rec->invocation_counter = parse_int("invocation_counter");
 446     rec->backedge_counter = parse_int("backedge_counter");
 447     rec->interpreter_invocation_count = parse_int("interpreter_invocation_count");
 448     rec->interpreter_throwout_count = parse_int("interpreter_throwout_count");
 449     rec->instructions_size = parse_int("instructions_size");
 450   }
 451 
 452   // ciMethodData <klass> <name> <signature> <state> <current mileage> orig <length> # # ... data <length> # # ... oops <length>
 453   void process_ciMethodData(TRAPS) {
 454     Method* method = parse_method(CHECK);
 455     if (had_error()) return;
 456     /* jsut copied from Method, to build interpret data*/
 457     if (InstanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) {
 458       return;
 459     }
 460     // methodOopDesc::build_interpreter_method_data(method, CHECK);
 461     {
 462       // Grab a lock here to prevent multiple
 463       // MethodData*s from being created.
 464       MutexLocker ml(MethodData_lock, THREAD);
 465       if (method->method_data() == NULL) {
 466         ClassLoaderData* loader_data = method->method_holder()->class_loader_data();
 467         MethodData* method_data = MethodData::allocate(loader_data, method, CHECK);
 468         method->set_method_data(method_data);
 469       }
 470     }
 471 
 472     // collect and record all the needed information for later
 473     ciMethodDataRecord* rec = new_ciMethodData(method);
 474     rec->state = parse_int("state");
 475     rec->current_mileage = parse_int("current_mileage");
 476 
 477     rec->orig_data = parse_data("orig", rec->orig_data_length);
 478     if (rec->orig_data == NULL) {
 479       return;
 480     }
 481     rec->data = parse_intptr_data("data", rec->data_length);
 482     if (rec->data == NULL) {
 483       return;
 484     }
 485     if (!parse_tag_and_count("oops", rec->oops_length)) {
 486       return;
 487     }
 488     rec->oops_handles = NEW_RESOURCE_ARRAY(jobject, rec->oops_length);
 489     rec->oops_offsets = NEW_RESOURCE_ARRAY(int, rec->oops_length);
 490     for (int i = 0; i < rec->oops_length; i++) {
 491       int offset = parse_int("offset");
 492       if (had_error()) {
 493         return;
 494       }
 495       Klass* k = parse_klass(CHECK);
 496       rec->oops_offsets[i] = offset;
 497       KlassHandle *kh = NEW_C_HEAP_OBJ(KlassHandle, mtCompiler);
 498       ::new ((void*)kh) KlassHandle(THREAD, k);
 499       rec->oops_handles[i] = (jobject)kh;
 500     }
 501   }
 502 
 503   // instanceKlass <name>
 504   //
 505   // Loads and initializes the klass 'name'.  This can be used to
 506   // create particular class loading environments
 507   void process_instanceKlass(TRAPS) {
 508     // just load the referenced class
 509     Klass* k = parse_klass(CHECK);
 510   }
 511 
 512   // ciInstanceKlass <name> <is_linked> <is_initialized> <length> tag # # # ...
 513   //
 514   // Load the klass 'name' and link or initialize it.  Verify that the
 515   // constant pool is the same length as 'length' and make sure the
 516   // constant pool tags are in the same state.
 517   void process_ciInstanceKlass(TRAPS) {
 518     InstanceKlass* k = (InstanceKlass *)parse_klass(CHECK);
 519     int is_linked = parse_int("is_linked");
 520     int is_initialized = parse_int("is_initialized");
 521     int length = parse_int("length");
 522     if (is_initialized) {
 523       k->initialize(THREAD);
 524       if (HAS_PENDING_EXCEPTION) {
 525         oop throwable = PENDING_EXCEPTION;
 526         java_lang_Throwable::print(throwable, tty);
 527         tty->cr();
 528         if (ReplayIgnoreInitErrors) {
 529           CLEAR_PENDING_EXCEPTION;
 530           k->set_init_state(InstanceKlass::fully_initialized);
 531         } else {
 532           return;
 533         }
 534       }
 535     } else if (is_linked) {
 536       k->link_class(CHECK);
 537     }
 538     ConstantPool* cp = k->constants();
 539     if (length != cp->length()) {
 540       report_error("constant pool length mismatch: wrong class files?");
 541       return;
 542     }
 543 
 544     int parsed_two_word = 0;
 545     for (int i = 1; i < length; i++) {
 546       int tag = parse_int("tag");
 547       if (had_error()) {
 548         return;
 549       }
 550       switch (cp->tag_at(i).value()) {
 551         case JVM_CONSTANT_UnresolvedClass: {
 552           if (tag == JVM_CONSTANT_Class) {
 553             tty->print_cr("Resolving klass %s at %d", cp->unresolved_klass_at(i)->as_utf8(), i);
 554             Klass* k = cp->klass_at(i, CHECK);
 555           }
 556           break;
 557         }
 558         case JVM_CONSTANT_Long:
 559         case JVM_CONSTANT_Double:
 560           parsed_two_word = i + 1;
 561 
 562         case JVM_CONSTANT_ClassIndex:
 563         case JVM_CONSTANT_StringIndex:
 564         case JVM_CONSTANT_String:
 565         case JVM_CONSTANT_UnresolvedClassInError:
 566         case JVM_CONSTANT_Fieldref:
 567         case JVM_CONSTANT_Methodref:
 568         case JVM_CONSTANT_InterfaceMethodref:
 569         case JVM_CONSTANT_NameAndType:
 570         case JVM_CONSTANT_Utf8:
 571         case JVM_CONSTANT_Integer:
 572         case JVM_CONSTANT_Float:
 573           if (tag != cp->tag_at(i).value()) {
 574             report_error("tag mismatch: wrong class files?");
 575             return;
 576           }
 577           break;
 578 
 579         case JVM_CONSTANT_Class:
 580           if (tag == JVM_CONSTANT_Class) {
 581           } else if (tag == JVM_CONSTANT_UnresolvedClass) {
 582             tty->print_cr("Warning: entry was unresolved in the replay data");
 583           } else {
 584             report_error("Unexpected tag");
 585             return;
 586           }
 587           break;
 588 
 589         case 0:
 590           if (parsed_two_word == i) continue;
 591 
 592         default:
 593           fatal(err_msg_res("Unexpected tag: %d", cp->tag_at(i).value()));
 594           break;
 595       }
 596 
 597     }
 598   }
 599 
 600   // Initialize a class and fill in the value for a static field.
 601   // This is useful when the compile was dependent on the value of
 602   // static fields but it's impossible to properly rerun the static
 603   // initiailizer.
 604   void process_staticfield(TRAPS) {
 605     InstanceKlass* k = (InstanceKlass *)parse_klass(CHECK);
 606 
 607     if (ReplaySuppressInitializers == 0 ||
 608         ReplaySuppressInitializers == 2 && k->class_loader() == NULL) {
 609       return;
 610     }
 611 
 612     assert(k->is_initialized(), "must be");
 613 
 614     const char* field_name = parse_escaped_string();;
 615     const char* field_signature = parse_string();
 616     fieldDescriptor fd;
 617     Symbol* name = SymbolTable::lookup(field_name, (int)strlen(field_name), CHECK);
 618     Symbol* sig = SymbolTable::lookup(field_signature, (int)strlen(field_signature), CHECK);
 619     if (!k->find_local_field(name, sig, &fd) ||
 620         !fd.is_static() ||
 621         fd.has_initial_value()) {
 622       report_error(field_name);
 623       return;
 624     }
 625 
 626     oop java_mirror = k->java_mirror();
 627     if (field_signature[0] == '[') {
 628       int length = parse_int("array length");
 629       oop value = NULL;
 630 
 631       if (field_signature[1] == '[') {
 632         // multi dimensional array
 633         ArrayKlass* kelem = (ArrayKlass *)parse_klass(CHECK);
 634         int rank = 0;
 635         while (field_signature[rank] == '[') {
 636           rank++;
 637         }
 638         int* dims = NEW_RESOURCE_ARRAY(int, rank);
 639         dims[0] = length;
 640         for (int i = 1; i < rank; i++) {
 641           dims[i] = 1; // These aren't relevant to the compiler
 642         }
 643         value = kelem->multi_allocate(rank, dims, CHECK);
 644       } else {
 645         if (strcmp(field_signature, "[B") == 0) {
 646           value = oopFactory::new_byteArray(length, CHECK);
 647         } else if (strcmp(field_signature, "[Z") == 0) {
 648           value = oopFactory::new_boolArray(length, CHECK);
 649         } else if (strcmp(field_signature, "[C") == 0) {
 650           value = oopFactory::new_charArray(length, CHECK);
 651         } else if (strcmp(field_signature, "[S") == 0) {
 652           value = oopFactory::new_shortArray(length, CHECK);
 653         } else if (strcmp(field_signature, "[F") == 0) {
 654           value = oopFactory::new_singleArray(length, CHECK);
 655         } else if (strcmp(field_signature, "[D") == 0) {
 656           value = oopFactory::new_doubleArray(length, CHECK);
 657         } else if (strcmp(field_signature, "[I") == 0) {
 658           value = oopFactory::new_intArray(length, CHECK);
 659         } else if (strcmp(field_signature, "[J") == 0) {
 660           value = oopFactory::new_longArray(length, CHECK);
 661         } else if (field_signature[0] == '[' && field_signature[1] == 'L') {
 662           KlassHandle kelem = resolve_klass(field_signature + 1, CHECK);
 663           value = oopFactory::new_objArray(kelem(), length, CHECK);
 664         } else {
 665           report_error("unhandled array staticfield");
 666         }
 667       }
 668       java_mirror->obj_field_put(fd.offset(), value);
 669     } else {
 670       const char* string_value = parse_escaped_string();
 671       if (strcmp(field_signature, "I") == 0) {
 672         int value = atoi(string_value);
 673         java_mirror->int_field_put(fd.offset(), value);
 674       } else if (strcmp(field_signature, "B") == 0) {
 675         int value = atoi(string_value);
 676         java_mirror->byte_field_put(fd.offset(), value);
 677       } else if (strcmp(field_signature, "C") == 0) {
 678         int value = atoi(string_value);
 679         java_mirror->char_field_put(fd.offset(), value);
 680       } else if (strcmp(field_signature, "S") == 0) {
 681         int value = atoi(string_value);
 682         java_mirror->short_field_put(fd.offset(), value);
 683       } else if (strcmp(field_signature, "Z") == 0) {
 684         int value = atol(string_value);
 685         java_mirror->bool_field_put(fd.offset(), value);
 686       } else if (strcmp(field_signature, "J") == 0) {
 687         jlong value;
 688         if (sscanf(string_value, JLONG_FORMAT, &value) != 1) {
 689           fprintf(stderr, "Error parsing long: %s\n", string_value);
 690           return;
 691         }
 692         java_mirror->long_field_put(fd.offset(), value);
 693       } else if (strcmp(field_signature, "F") == 0) {
 694         float value = atof(string_value);
 695         java_mirror->float_field_put(fd.offset(), value);
 696       } else if (strcmp(field_signature, "D") == 0) {
 697         double value = atof(string_value);
 698         java_mirror->double_field_put(fd.offset(), value);
 699       } else if (strcmp(field_signature, "Ljava/lang/String;") == 0) {
 700         Handle value = java_lang_String::create_from_str(string_value, CHECK);
 701         java_mirror->obj_field_put(fd.offset(), value());
 702       } else if (field_signature[0] == 'L') {
 703         Symbol* klass_name = SymbolTable::lookup(field_signature, (int)strlen(field_signature), CHECK);
 704         KlassHandle kelem = resolve_klass(field_signature, CHECK);
 705         oop value = ((InstanceKlass*)kelem())->allocate_instance(CHECK);
 706         java_mirror->obj_field_put(fd.offset(), value);
 707       } else {
 708         report_error("unhandled staticfield");
 709       }
 710     }
 711   }
 712 
 713 #if INCLUDE_JVMTI
 714   void process_JvmtiExport(TRAPS) {
 715     const char* field = parse_string();
 716     bool value = parse_int("JvmtiExport flag") != 0;
 717     if (strcmp(field, "can_access_local_variables") == 0) {
 718       JvmtiExport::set_can_access_local_variables(value);
 719     } else if (strcmp(field, "can_hotswap_or_post_breakpoint") == 0) {
 720       JvmtiExport::set_can_hotswap_or_post_breakpoint(value);
 721     } else if (strcmp(field, "can_post_on_exceptions") == 0) {
 722       JvmtiExport::set_can_post_on_exceptions(value);
 723     } else {
 724       report_error("Unrecognized JvmtiExport directive");
 725     }
 726   }
 727 #endif // INCLUDE_JVMTI
 728 
 729   // Create and initialize a record for a ciMethod
 730   ciMethodRecord* new_ciMethod(Method* method) {
 731     ciMethodRecord* rec = NEW_RESOURCE_OBJ(ciMethodRecord);
 732     rec->klass =  method->method_holder()->name()->as_utf8();
 733     rec->method = method->name()->as_utf8();
 734     rec->signature = method->signature()->as_utf8();
 735     ci_method_records.append(rec);
 736     return rec;
 737   }
 738 
 739   // Lookup data for a ciMethod
 740   ciMethodRecord* find_ciMethodRecord(Method* method) {
 741     const char* klass_name =  method->method_holder()->name()->as_utf8();
 742     const char* method_name = method->name()->as_utf8();
 743     const char* signature = method->signature()->as_utf8();
 744     for (int i = 0; i < ci_method_records.length(); i++) {
 745       ciMethodRecord* rec = ci_method_records.at(i);
 746       if (strcmp(rec->klass, klass_name) == 0 &&
 747           strcmp(rec->method, method_name) == 0 &&
 748           strcmp(rec->signature, signature) == 0) {
 749         return rec;
 750       }
 751     }
 752     return NULL;
 753   }
 754 
 755   // Create and initialize a record for a ciMethodData
 756   ciMethodDataRecord* new_ciMethodData(Method* method) {
 757     ciMethodDataRecord* rec = NEW_RESOURCE_OBJ(ciMethodDataRecord);
 758     rec->klass =  method->method_holder()->name()->as_utf8();
 759     rec->method = method->name()->as_utf8();
 760     rec->signature = method->signature()->as_utf8();
 761     ci_method_data_records.append(rec);
 762     return rec;
 763   }
 764 
 765   // Lookup data for a ciMethodData
 766   ciMethodDataRecord* find_ciMethodDataRecord(Method* method) {
 767     const char* klass_name =  method->method_holder()->name()->as_utf8();
 768     const char* method_name = method->name()->as_utf8();
 769     const char* signature = method->signature()->as_utf8();
 770     for (int i = 0; i < ci_method_data_records.length(); i++) {
 771       ciMethodDataRecord* rec = ci_method_data_records.at(i);
 772       if (strcmp(rec->klass, klass_name) == 0 &&
 773           strcmp(rec->method, method_name) == 0 &&
 774           strcmp(rec->signature, signature) == 0) {
 775         return rec;
 776       }
 777     }
 778     return NULL;
 779   }
 780 
 781   const char* error_message() {
 782     return _error_message;
 783   }
 784 
 785   void reset() {
 786     _error_message = NULL;
 787     ci_method_records.clear();
 788     ci_method_data_records.clear();
 789   }
 790 
 791   // Take an ascii string contain \u#### escapes and convert it to utf8
 792   // in place.
 793   static void unescape_string(char* value) {
 794     char* from = value;
 795     char* to = value;
 796     while (*from != '\0') {
 797       if (*from != '\\') {
 798         *from++ = *to++;
 799       } else {
 800         switch (from[1]) {
 801           case 'u': {
 802             from += 2;
 803             jchar value=0;
 804             for (int i=0; i<4; i++) {
 805               char c = *from++;
 806               switch (c) {
 807                 case '0': case '1': case '2': case '3': case '4':
 808                 case '5': case '6': case '7': case '8': case '9':
 809                   value = (value << 4) + c - '0';
 810                   break;
 811                 case 'a': case 'b': case 'c':
 812                 case 'd': case 'e': case 'f':
 813                   value = (value << 4) + 10 + c - 'a';
 814                   break;
 815                 case 'A': case 'B': case 'C':
 816                 case 'D': case 'E': case 'F':
 817                   value = (value << 4) + 10 + c - 'A';
 818                   break;
 819                 default:
 820                   ShouldNotReachHere();
 821               }
 822             }
 823             UNICODE::convert_to_utf8(&value, 1, to);
 824             to++;
 825             break;
 826           }
 827           case 't': *to++ = '\t'; from += 2; break;
 828           case 'n': *to++ = '\n'; from += 2; break;
 829           case 'r': *to++ = '\r'; from += 2; break;
 830           case 'f': *to++ = '\f'; from += 2; break;
 831           default:
 832             ShouldNotReachHere();
 833         }
 834       }
 835     }
 836     *from = *to;
 837   }
 838 };
 839 
 840 void ciReplay::replay(TRAPS) {
 841   int exit_code = replay_impl(THREAD);
 842 
 843   Threads::destroy_vm();
 844 
 845   vm_exit(exit_code);
 846 }
 847 
 848 int ciReplay::replay_impl(TRAPS) {
 849   HandleMark hm;
 850   ResourceMark rm;
 851   // Make sure we don't run with background compilation
 852   BackgroundCompilation = false;
 853 
 854   if (ReplaySuppressInitializers > 2) {
 855     // ReplaySuppressInitializers > 2 means that we want to allow
 856     // normal VM bootstrap but once we get into the replay itself
 857     // don't allow any intializers to be run.
 858     ReplaySuppressInitializers = 1;
 859   }
 860 
 861   if (FLAG_IS_DEFAULT(ReplayDataFile)) {
 862     tty->print_cr("ERROR: no compiler replay data file specified (use -XX:ReplayDataFile=replay_pid12345.txt).");
 863     return 1;
 864   }
 865 
 866   // Load and parse the replay data
 867   CompileReplay rp(ReplayDataFile, THREAD);
 868   int exit_code = 0;
 869   if (rp.can_replay()) {
 870     rp.process(THREAD);
 871   } else {
 872     exit_code = 1;
 873     return exit_code;
 874   }
 875 
 876   if (HAS_PENDING_EXCEPTION) {
 877     oop throwable = PENDING_EXCEPTION;
 878     CLEAR_PENDING_EXCEPTION;
 879     java_lang_Throwable::print(throwable, tty);
 880     tty->cr();
 881     java_lang_Throwable::print_stack_trace(throwable, tty);
 882     tty->cr();
 883     exit_code = 2;
 884   }
 885 
 886   if (rp.had_error()) {
 887     tty->print_cr("Failed on %s", rp.error_message());
 888     exit_code = 1;
 889   }
 890   return exit_code;
 891 }
 892 
 893 
 894 void ciReplay::initialize(ciMethodData* m) {
 895   if (replay_state == NULL) {
 896     return;
 897   }
 898 
 899   ASSERT_IN_VM;
 900   ResourceMark rm;
 901 
 902   Method* method = m->get_MethodData()->method();
 903   ciMethodDataRecord* rec = replay_state->find_ciMethodDataRecord(method);
 904   if (rec == NULL) {
 905     // This indicates some mismatch with the original environment and
 906     // the replay environment though it's not always enough to
 907     // interfere with reproducing a bug
 908     tty->print_cr("Warning: requesting ciMethodData record for method with no data: ");
 909     method->print_name(tty);
 910     tty->cr();
 911   } else {
 912     m->_state = rec->state;
 913     m->_current_mileage = rec->current_mileage;
 914     if (rec->data_length != 0) {
 915       assert(m->_data_size == rec->data_length * (int)sizeof(rec->data[0]), "must agree");
 916 
 917       // Write the correct ciObjects back into the profile data
 918       ciEnv* env = ciEnv::current();
 919       for (int i = 0; i < rec->oops_length; i++) {
 920         KlassHandle *h = (KlassHandle *)rec->oops_handles[i];
 921         *(ciMetadata**)(rec->data + rec->oops_offsets[i]) =
 922           env->get_metadata((*h)());
 923       }
 924       // Copy the updated profile data into place as intptr_ts
 925 #ifdef _LP64
 926       Copy::conjoint_jlongs_atomic((jlong *)rec->data, (jlong *)m->_data, rec->data_length);
 927 #else
 928       Copy::conjoint_jints_atomic((jint *)rec->data, (jint *)m->_data, rec->data_length);
 929 #endif
 930     }
 931 
 932     // copy in the original header
 933     Copy::conjoint_jbytes(rec->orig_data, (char*)&m->_orig, rec->orig_data_length);
 934   }
 935 }
 936 
 937 
 938 bool ciReplay::should_not_inline(ciMethod* method) {
 939   if (replay_state == NULL) {
 940     return false;
 941   }
 942 
 943   VM_ENTRY_MARK;
 944   // ciMethod without a record shouldn't be inlined.
 945   return replay_state->find_ciMethodRecord(method->get_Method()) == NULL;
 946 }
 947 
 948 
 949 void ciReplay::initialize(ciMethod* m) {
 950   if (replay_state == NULL) {
 951     return;
 952   }
 953 
 954   ASSERT_IN_VM;
 955   ResourceMark rm;
 956 
 957   Method* method = m->get_Method();
 958   ciMethodRecord* rec = replay_state->find_ciMethodRecord(method);
 959   if (rec == NULL) {
 960     // This indicates some mismatch with the original environment and
 961     // the replay environment though it's not always enough to
 962     // interfere with reproducing a bug
 963     tty->print_cr("Warning: requesting ciMethod record for method with no data: ");
 964     method->print_name(tty);
 965     tty->cr();
 966   } else {
 967     EXCEPTION_CONTEXT;
 968     // m->_instructions_size = rec->instructions_size;
 969     m->_instructions_size = -1;
 970     m->_interpreter_invocation_count = rec->interpreter_invocation_count;
 971     m->_interpreter_throwout_count = rec->interpreter_throwout_count;
 972     MethodCounters* mcs = method->get_method_counters(CHECK_AND_CLEAR);
 973     guarantee(mcs != NULL, "method counters allocation failed");
 974     mcs->invocation_counter()->_counter = rec->invocation_counter;
 975     mcs->backedge_counter()->_counter = rec->backedge_counter;
 976   }
 977 }
 978 
 979 bool ciReplay::is_loaded(Method* method) {
 980   if (replay_state == NULL) {
 981     return true;
 982   }
 983 
 984   ASSERT_IN_VM;
 985   ResourceMark rm;
 986 
 987   ciMethodRecord* rec = replay_state->find_ciMethodRecord(method);
 988   return rec != NULL;
 989 }
 990 #endif // PRODUCT