1 /* Copyright (c) 2012, 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 

    34 #ifdef ASSERT

    35 

    36 // ciReplay

    37 

    38 typedef struct _ciMethodDataRecord {

    39   const char* klass;

    40   const char* method;

    41   const char* signature;

    42   int state;

    43   int current_mileage;

    44   intptr_t* data;

    45   int data_length;

    46   char* orig_data;

    47   int orig_data_length;

    48   int oops_length;

    49   jobject* oops_handles;

    50   int* oops_offsets;

    51 } ciMethodDataRecord;

    52 

    53 typedef struct _ciMethodRecord {

    54   const char* klass;

    55   const char* method;

    56   const char* signature;

    57   int instructions_size;

    58   int interpreter_invocation_count;

    59   int interpreter_throwout_count;

    60   int invocation_counter;

    61   int backedge_counter;

    62 } ciMethodRecord;

    63 

    64 class CompileReplay;

    65 static CompileReplay* replay_state;

    66 

    67 class CompileReplay : public StackObj {

    68  private:

    69   FILE*   stream;

    70   Thread* thread;

    71   Handle  protection_domain;

    72   Handle  loader;

    73 

    74   GrowableArray<ciMethodRecord*>     ci_method_records;

    75   GrowableArray<ciMethodDataRecord*> ci_method_data_records;

    76 

    77   const char* _error_message;

    78 

    79   char* bufptr;

    80   char* buffer;

    81   int   buffer_length;

    82   int   buffer_end;

    83   int   line_no;

    84 

    85  public:

    86   CompileReplay(const char* filename, TRAPS) {

    87     thread = THREAD;

    88     loader = Handle(thread, SystemDictionary::java_system_loader());

    89     stream = fopen(filename, "rt");

    90     if (stream == NULL) {

    91       fprintf(stderr, "Can't open replay file %s\n", filename);

    92     }

    93     buffer_length = 32;

    94     buffer = NEW_RESOURCE_ARRAY(char, buffer_length);

    95     _error_message = NULL;

    96 

    97     test();

    98   }

    99 

   100   ~CompileReplay() {

   101     if (stream != NULL) fclose(stream);

   102   }

   103 

   104   void test() {

   105     strcpy(buffer, "1 2 foo 4 bar 0x9 \"this is it\"");

   106     bufptr = buffer;

   107     assert(parse_int("test") == 1, "what");

   108     assert(parse_int("test") == 2, "what");

   109     assert(strcmp(parse_string(), "foo") == 0, "what");

   110     assert(parse_int("test") == 4, "what");

   111     assert(strcmp(parse_string(), "bar") == 0, "what");

   112     assert(parse_intptr_t("test") == 9, "what");

   113     assert(strcmp(parse_quoted_string(), "this is it") == 0, "what");

   114   }

   115 

   116   bool had_error() {

   117     return _error_message != NULL || thread->has_pending_exception();

   118   }

   119 

   120   bool can_replay() {

   121     return !(stream == NULL || had_error());

   122   }

   123 

   124   void report_error(const char* msg) {

   125     _error_message = msg;

   126     // Restore the buffer contents for error reporting

   127     for (int i = 0; i < buffer_end; i++) {

   128       if (buffer[i] == '\0') buffer[i] = ' ';

   129     }

   130   }

   131 

   132   int parse_int(const char* label) {

   133     if (had_error()) {

   134       return 0;

   135     }

   136 

   137     int v = 0;

   138     int read;

   139     if (sscanf(bufptr, "%i%n", &v, &read) != 1) {

   140       report_error(label);

   141     } else {

   142       bufptr += read;

   143     }

   144     return v;

   145   }

   146 

   147   intptr_t parse_intptr_t(const char* label) {

   148     if (had_error()) {

   149       return 0;

   150     }

   151 

   152     intptr_t v = 0;

   153     int read;

   154     if (sscanf(bufptr, INTPTR_FORMAT "%n", &v, &read) != 1) {

   155       report_error(label);

   156     } else {

   157       bufptr += read;

   158     }

   159     return v;

   160   }

   161 

   162   void skip_ws() {

   163     // Skip any leading whitespace

   164     while (*bufptr == ' ' || *bufptr == '\t') {

   165       bufptr++;

   166     }

   167   }

   168 

   169 

   170   char* scan_and_terminate(char delim) {

   171     char* str = bufptr;

   172     while (*bufptr != delim && *bufptr != '\0') {

   173       bufptr++;

   174     }

   175     if (*bufptr != '\0') {

   176       *bufptr++ = '\0';

   177     }

   178     if (bufptr == str) {

   179       // nothing here

   180       return NULL;

   181     }

   182     return str;

   183   }

   184 

   185   char* parse_string() {

   186     if (had_error()) return NULL;

   187 

   188     skip_ws();

   189     return scan_and_terminate(' ');

   190   }

   191 

   192   char* parse_quoted_string() {

   193     if (had_error()) return NULL;

   194 

   195     skip_ws();

   196 

   197     if (*bufptr == '"') {

   198       bufptr++;

   199       return scan_and_terminate('"');

   200     } else {

   201       return scan_and_terminate(' ');

   202     }

   203   }

   204 

   205   const char* parse_escaped_string() {

   206     char* result = parse_quoted_string();

   207     if (result != NULL) {

   208       unescape_string(result);

   209     }

   210     return result;

   211   }

   212 

   213   // Look for the tag 'tag' followed by an

   214   bool parse_tag_and_count(const char* tag, int& length) {

   215     const char* t = parse_string();

   216     if (t == NULL) {

   217       return false;

   218     }

   219 

   220     if (strcmp(tag, t) != 0) {

   221       report_error(tag);

   222       return false;

   223     }

   224     length = parse_int("parse_tag_and_count");

   225     return !had_error();

   226   }

   227 

   228   // Parse a sequence of raw data encoded as bytes and return the

   229   // resulting data.

   230   char* parse_data(const char* tag, int& length) {

   231     if (!parse_tag_and_count(tag, length)) {

   232       return NULL;

   233     }

   234 

   235     char * result = NEW_RESOURCE_ARRAY(char, length);

   236     for (int i = 0; i < length; i++) {

   237       int val = parse_int("data");

   238       result[i] = val;

   239     }

   240     return result;

   241   }

   242 

   243   // Parse a standard chunk of data emitted as:

   244   //   'tag' <length> # # ...

   245   // Where each # is an intptr_t item

   246   intptr_t* parse_intptr_data(const char* tag, int& length) {

   247     if (!parse_tag_and_count(tag, length)) {

   248       return NULL;

   249     }

   250 

   251     intptr_t* result = NEW_RESOURCE_ARRAY(intptr_t, length);

   252     for (int i = 0; i < length; i++) {

   253       skip_ws();

   254       intptr_t val = parse_intptr_t("data");

   255       result[i] = val;

   256     }

   257     return result;

   258   }

   259 

   260   // Parse a possibly quoted version of a symbol into a symbolOop

   261   Symbol* parse_symbol(TRAPS) {

   262     const char* str = parse_escaped_string();

   263     if (str != NULL) {

   264       Symbol* sym = SymbolTable::lookup(str, (int)strlen(str), CHECK_NULL);

   265       return sym;

   266     }

   267     return NULL;

   268   }

   269 

   270   // Parse a valid klass name and look it up

   271   Klass* parse_klass(TRAPS) {

   272     const char* str = parse_escaped_string();

   273     Symbol* klass_name = SymbolTable::lookup(str, (int)strlen(str), CHECK_NULL);

   274     if (klass_name != NULL) {

   275       Klass* k = SystemDictionary::resolve_or_fail(klass_name, loader, protection_domain, true, THREAD);

   276       if (HAS_PENDING_EXCEPTION) {

   277         oop throwable = PENDING_EXCEPTION;

   278         java_lang_Throwable::print(throwable, tty);

   279         tty->cr();

   280         report_error(str);

   281         return NULL;

   282       }

   283       return k;

   284     }

   285     return NULL;

   286   }

   287 

   288   // Lookup a klass

   289   Klass* resolve_klass(const char* klass, TRAPS) {

   290     Symbol* klass_name = SymbolTable::lookup(klass, (int)strlen(klass), CHECK_NULL);

   291     return SystemDictionary::resolve_or_fail(klass_name, loader, protection_domain, true, CHECK_NULL);

   292   }

   293 

   294   // Parse the standard tuple of <klass> <name> <signature>

   295   Method* parse_method(TRAPS) {

   296     InstanceKlass* k = (InstanceKlass*)parse_klass(CHECK_NULL);

   297     Symbol* method_name = parse_symbol(CHECK_NULL);

   298     Symbol* method_signature = parse_symbol(CHECK_NULL);

   299     Method* m = k->find_method(method_name, method_signature);

   300     if (m == NULL) {

   301       report_error("can't find method");

   302     }

   303     return m;

   304   }

   305 

   306   // Process each line of the replay file executing each command until

   307   // the file ends.

   308   void process(TRAPS) {

   309     line_no = 1;

   310     int pos = 0;

   311     int c = getc(stream);

   312     while(c != EOF) {

   313       if (pos + 1 >= buffer_length) {

   314         int newl = buffer_length * 2;

   315         char* newb = NEW_RESOURCE_ARRAY(char, newl);

   316         memcpy(newb, buffer, pos);

   317         buffer = newb;

   318         buffer_length = newl;

   319       }

   320       if (c == '\n') {

   321         // null terminate it, reset the pointer and process the line

   322         buffer[pos] = '\0';

   323         buffer_end = pos++;

   324         bufptr = buffer;

   325         process_command(CHECK);

   326         if (had_error()) {

   327           tty->print_cr("Error while parsing line %d: %s\n", line_no, _error_message);

   328           tty->print_cr("%s", buffer);

   329           assert(false, "error");

   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   // compile <klass> <name> <signature> <entry_bci>

   373   void process_compile(TRAPS) {

   374     // methodHandle method;

   375     Method* method = parse_method(CHECK);

   376     int entry_bci = parse_int("entry_bci");

   377     Klass* k = method->method_holder();

   378     ((InstanceKlass*)k)->initialize(THREAD);

   379     if (HAS_PENDING_EXCEPTION) {

   380       oop throwable = PENDING_EXCEPTION;

   381       java_lang_Throwable::print(throwable, tty);

   382       tty->cr();

   383       if (ReplayIgnoreInitErrors) {

   384         CLEAR_PENDING_EXCEPTION;

   385         ((InstanceKlass*)k)->set_init_state(InstanceKlass::fully_initialized);

   386       } else {

   387         return;

   388       }

   389     }

   390     // Make sure the existence of a prior compile doesn't stop this one

   391     nmethod* nm = (entry_bci != InvocationEntryBci) ? method->lookup_osr_nmethod_for(entry_bci, CompLevel_full_optimization, true) : method->code();

   392     if (nm != NULL) {

   393       nm->make_not_entrant();

   394     }

   395     replay_state = this;

   396     CompileBroker::compile_method(method, entry_bci, CompLevel_full_optimization,

   397                                   methodHandle(), 0, "replay", THREAD);

   398     replay_state = NULL;

   399     reset();

   400   }

   401 

   402   // ciMethod <klass> <name> <signature> <invocation_counter> <backedge_counter> <interpreter_invocation_count> <interpreter_throwout_count> <instructions_size>

   403   //

   404   //

   405   void process_ciMethod(TRAPS) {

   406     Method* method = parse_method(CHECK);

   407     ciMethodRecord* rec = new_ciMethod(method);

   408     rec->invocation_counter = parse_int("invocation_counter");

   409     rec->backedge_counter = parse_int("backedge_counter");

   410     rec->interpreter_invocation_count = parse_int("interpreter_invocation_count");

   411     rec->interpreter_throwout_count = parse_int("interpreter_throwout_count");

   412     rec->instructions_size = parse_int("instructions_size");

   413   }

   414 

   415   // ciMethodData <klass> <name> <signature> <state> <current mileage> orig <length> # # ... data <length> # # ... oops <length>

   416   void process_ciMethodData(TRAPS) {

   417     Method* method = parse_method(CHECK);

   418     /* jsut copied from Method, to build interpret data*/

   419     if (InstanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) {

   420       return;

   421     }

   422     // methodOopDesc::build_interpreter_method_data(method, CHECK);

   423     {

   424       // Grab a lock here to prevent multiple

   425       // MethodData*s from being created.

   426       MutexLocker ml(MethodData_lock, THREAD);

   427       if (method->method_data() == NULL) {

   428         ClassLoaderData* loader_data = method->method_holder()->class_loader_data();

   429         MethodData* method_data = MethodData::allocate(loader_data, method, CHECK);

   430         method->set_method_data(method_data);

   431       }

   432     }

   433 

   434     // collect and record all the needed information for later

   435     ciMethodDataRecord* rec = new_ciMethodData(method);

   436     rec->state = parse_int("state");

   437     rec->current_mileage = parse_int("current_mileage");

   438 

   439     rec->orig_data = parse_data("orig", rec->orig_data_length);

   440     if (rec->orig_data == NULL) {

   441       return;

   442     }

   443     rec->data = parse_intptr_data("data", rec->data_length);

   444     if (rec->data == NULL) {

   445       return;

   446     }

   447     if (!parse_tag_and_count("oops", rec->oops_length)) {

   448       return;

   449     }

   450     rec->oops_handles = NEW_RESOURCE_ARRAY(jobject, rec->oops_length);

   451     rec->oops_offsets = NEW_RESOURCE_ARRAY(int, rec->oops_length);

   452     for (int i = 0; i < rec->oops_length; i++) {

   453       int offset = parse_int("offset");

   454       if (had_error()) {

   455         return;

   456       }

   457       Klass* k = parse_klass(CHECK);

   458       rec->oops_offsets[i] = offset;

   459       rec->oops_handles[i] = (jobject)(new KlassHandle(THREAD, k));

   460     }

   461   }

   462 

   463   // instanceKlass <name>

   464   //

   465   // Loads and initializes the klass 'name'.  This can be used to

   466   // create particular class loading environments

   467   void process_instanceKlass(TRAPS) {

   468     // just load the referenced class

   469     Klass* k = parse_klass(CHECK);

   470   }

   471 

   472   // ciInstanceKlass <name> <is_linked> <is_initialized> <length> tag # # # ...

   473   //

   474   // Load the klass 'name' and link or initialize it.  Verify that the

   475   // constant pool is the same length as 'length' and make sure the

   476   // constant pool tags are in the same state.

   477   void process_ciInstanceKlass(TRAPS) {

   478     InstanceKlass* k = (InstanceKlass *)parse_klass(CHECK);

   479     int is_linked = parse_int("is_linked");

   480     int is_initialized = parse_int("is_initialized");

   481     int length = parse_int("length");

   482     if (is_initialized) {

   483       k->initialize(THREAD);

   484       if (HAS_PENDING_EXCEPTION) {

   485         oop throwable = PENDING_EXCEPTION;

   486         java_lang_Throwable::print(throwable, tty);

   487         tty->cr();

   488         if (ReplayIgnoreInitErrors) {

   489           CLEAR_PENDING_EXCEPTION;

   490           k->set_init_state(InstanceKlass::fully_initialized);

   491         } else {

   492           return;

   493         }

   494       }

   495     } else if (is_linked) {

   496       k->link_class(CHECK);

   497     }

   498     ConstantPool* cp = k->constants();

   499     if (length != cp->length()) {

   500       report_error("constant pool length mismatch: wrong class files?");

   501       return;

   502     }

   503 

   504     int parsed_two_word = 0;

   505     for (int i = 1; i < length; i++) {

   506       int tag = parse_int("tag");

   507       if (had_error()) {

   508         return;

   509       }

   510       switch (cp->tag_at(i).value()) {

   511         case JVM_CONSTANT_UnresolvedClass: {

   512           if (tag == JVM_CONSTANT_Class) {

   513             tty->print_cr("Resolving klass %s at %d", cp->unresolved_klass_at(i)->as_utf8(), i);

   514             Klass* k = cp->klass_at(i, CHECK);

   515           }

   516           break;

   517         }

   518         case JVM_CONSTANT_Long:

   519         case JVM_CONSTANT_Double:

   520           parsed_two_word = i + 1;

   521 

   522         case JVM_CONSTANT_ClassIndex:

   523         case JVM_CONSTANT_StringIndex:

   524         case JVM_CONSTANT_String:

   525         case JVM_CONSTANT_UnresolvedClassInError:

   526         case JVM_CONSTANT_Fieldref:

   527         case JVM_CONSTANT_Methodref:

   528         case JVM_CONSTANT_InterfaceMethodref:

   529         case JVM_CONSTANT_NameAndType:

   530         case JVM_CONSTANT_Utf8:

   531         case JVM_CONSTANT_Integer:

   532         case JVM_CONSTANT_Float:

   533           if (tag != cp->tag_at(i).value()) {

   534             report_error("tag mismatch: wrong class files?");

   535             return;

   536           }

   537           break;

   538 

   539         case JVM_CONSTANT_Class:

   540           if (tag == JVM_CONSTANT_Class) {

   541           } else if (tag == JVM_CONSTANT_UnresolvedClass) {

   542             tty->print_cr("Warning: entry was unresolved in the replay data");

   543           } else {

   544             report_error("Unexpected tag");

   545             return;

   546           }

   547           break;

   548 

   549         case 0:

   550           if (parsed_two_word == i) continue;

   551 

   552         default:

   553           ShouldNotReachHere();

   554           break;

   555       }

   556 

   557     }

   558   }

   559 

   560   // Initialize a class and fill in the value for a static field.

   561   // This is useful when the compile was dependent on the value of

   562   // static fields but it's impossible to properly rerun the static

   563   // initiailizer.

   564   void process_staticfield(TRAPS) {

   565     InstanceKlass* k = (InstanceKlass *)parse_klass(CHECK);

   566 

   567     if (ReplaySuppressInitializers == 0 ||

   568         ReplaySuppressInitializers == 2 && k->class_loader() == NULL) {

   569       return;

   570     }

   571 

   572     assert(k->is_initialized(), "must be");

   573 

   574     const char* field_name = parse_escaped_string();;

   575     const char* field_signature = parse_string();

   576     fieldDescriptor fd;

   577     Symbol* name = SymbolTable::lookup(field_name, (int)strlen(field_name), CHECK);

   578     Symbol* sig = SymbolTable::lookup(field_signature, (int)strlen(field_signature), CHECK);

   579     if (!k->find_local_field(name, sig, &fd) ||

   580         !fd.is_static() ||

   581         fd.has_initial_value()) {

   582       report_error(field_name);

   583       return;

   584     }

   585 

   586     oop java_mirror = k->java_mirror();

   587     if (field_signature[0] == '[') {

   588       int length = parse_int("array length");

   589       oop value = NULL;

   590 

   591       if (field_signature[1] == '[') {

   592         // multi dimensional array

   593         ArrayKlass* kelem = (ArrayKlass *)parse_klass(CHECK);

   594         int rank = 0;

   595         while (field_signature[rank] == '[') {

   596           rank++;

   597         }

   598         int* dims = NEW_RESOURCE_ARRAY(int, rank);

   599         dims[0] = length;

   600         for (int i = 1; i < rank; i++) {

   601           dims[i] = 1; // These aren't relevant to the compiler

   602         }

   603         value = kelem->multi_allocate(rank, dims, CHECK);

   604       } else {

   605         if (strcmp(field_signature, "[B") == 0) {

   606           value = oopFactory::new_byteArray(length, CHECK);

   607         } else if (strcmp(field_signature, "[Z") == 0) {

   608           value = oopFactory::new_boolArray(length, CHECK);

   609         } else if (strcmp(field_signature, "[C") == 0) {

   610           value = oopFactory::new_charArray(length, CHECK);

   611         } else if (strcmp(field_signature, "[S") == 0) {

   612           value = oopFactory::new_shortArray(length, CHECK);

   613         } else if (strcmp(field_signature, "[F") == 0) {

   614           value = oopFactory::new_singleArray(length, CHECK);

   615         } else if (strcmp(field_signature, "[D") == 0) {

   616           value = oopFactory::new_doubleArray(length, CHECK);

   617         } else if (strcmp(field_signature, "[I") == 0) {

   618           value = oopFactory::new_intArray(length, CHECK);

   619         } else if (strcmp(field_signature, "[J") == 0) {

   620           value = oopFactory::new_longArray(length, CHECK);

   621         } else if (field_signature[0] == '[' && field_signature[1] == 'L') {

   622           KlassHandle kelem = resolve_klass(field_signature + 1, CHECK);

   623           value = oopFactory::new_objArray(kelem(), length, CHECK);

   624         } else {

   625           report_error("unhandled array staticfield");

   626         }

   627       }

   628       java_mirror->obj_field_put(fd.offset(), value);

   629     } else {

   630       const char* string_value = parse_escaped_string();

   631       if (strcmp(field_signature, "I") == 0) {

   632         int value = atoi(string_value);

   633         java_mirror->int_field_put(fd.offset(), value);

   634       } else if (strcmp(field_signature, "B") == 0) {

   635         int value = atoi(string_value);

   636         java_mirror->byte_field_put(fd.offset(), value);

   637       } else if (strcmp(field_signature, "C") == 0) {

   638         int value = atoi(string_value);

   639         java_mirror->char_field_put(fd.offset(), value);

   640       } else if (strcmp(field_signature, "S") == 0) {

   641         int value = atoi(string_value);

   642         java_mirror->short_field_put(fd.offset(), value);

   643       } else if (strcmp(field_signature, "Z") == 0) {

   644         int value = atol(string_value);

   645         java_mirror->bool_field_put(fd.offset(), value);

   646       } else if (strcmp(field_signature, "J") == 0) {

   647         jlong value;

   648         if (sscanf(string_value, INT64_FORMAT, &value) != 1) {

   649           fprintf(stderr, "Error parsing long: %s\n", string_value);

   650           return;

   651         }

   652         java_mirror->long_field_put(fd.offset(), value);

   653       } else if (strcmp(field_signature, "F") == 0) {

   654         float value = atof(string_value);

   655         java_mirror->float_field_put(fd.offset(), value);

   656       } else if (strcmp(field_signature, "D") == 0) {

   657         double value = atof(string_value);

   658         java_mirror->double_field_put(fd.offset(), value);

   659       } else if (strcmp(field_signature, "Ljava/lang/String;") == 0) {

   660         Handle value = java_lang_String::create_from_str(string_value, CHECK);

   661         java_mirror->obj_field_put(fd.offset(), value());

   662       } else if (field_signature[0] == 'L') {

   663         Symbol* klass_name = SymbolTable::lookup(field_signature, (int)strlen(field_signature), CHECK);

   664         KlassHandle kelem = resolve_klass(field_signature, CHECK);

   665         oop value = ((InstanceKlass*)kelem())->allocate_instance(CHECK);

   666         java_mirror->obj_field_put(fd.offset(), value);

   667       } else {

   668         report_error("unhandled staticfield");

   669       }

   670     }

   671   }

   672 

   673 #if INCLUDE_JVMTI

   674   void process_JvmtiExport(TRAPS) {

   675     const char* field = parse_string();

   676     bool value = parse_int("JvmtiExport flag") != 0;

   677     if (strcmp(field, "can_access_local_variables") == 0) {

   678       JvmtiExport::set_can_access_local_variables(value);

   679     } else if (strcmp(field, "can_hotswap_or_post_breakpoint") == 0) {

   680       JvmtiExport::set_can_hotswap_or_post_breakpoint(value);

   681     } else if (strcmp(field, "can_post_on_exceptions") == 0) {

   682       JvmtiExport::set_can_post_on_exceptions(value);

   683     } else {

   684       report_error("Unrecognized JvmtiExport directive");

   685     }

   686   }

   687 #endif // INCLUDE_JVMTI

   688 

   689   // Create and initialize a record for a ciMethod

   690   ciMethodRecord* new_ciMethod(Method* method) {

   691     ciMethodRecord* rec = NEW_RESOURCE_OBJ(ciMethodRecord);

   692     rec->klass =  method->method_holder()->name()->as_utf8();

   693     rec->method = method->name()->as_utf8();

   694     rec->signature = method->signature()->as_utf8();

   695     ci_method_records.append(rec);

   696     return rec;

   697   }

   698 

   699   // Lookup data for a ciMethod

   700   ciMethodRecord* find_ciMethodRecord(Method* method) {

   701     const char* klass_name =  method->method_holder()->name()->as_utf8();

   702     const char* method_name = method->name()->as_utf8();

   703     const char* signature = method->signature()->as_utf8();

   704     for (int i = 0; i < ci_method_records.length(); i++) {

   705       ciMethodRecord* rec = ci_method_records.at(i);

   706       if (strcmp(rec->klass, klass_name) == 0 &&

   707           strcmp(rec->method, method_name) == 0 &&

   708           strcmp(rec->signature, signature) == 0) {

   709         return rec;

   710       }

   711     }

   712     return NULL;

   713   }

   714 

   715   // Create and initialize a record for a ciMethodData

   716   ciMethodDataRecord* new_ciMethodData(Method* method) {

   717     ciMethodDataRecord* rec = NEW_RESOURCE_OBJ(ciMethodDataRecord);

   718     rec->klass =  method->method_holder()->name()->as_utf8();

   719     rec->method = method->name()->as_utf8();

   720     rec->signature = method->signature()->as_utf8();

   721     ci_method_data_records.append(rec);

   722     return rec;

   723   }

   724 

   725   // Lookup data for a ciMethodData

   726   ciMethodDataRecord* find_ciMethodDataRecord(Method* method) {

   727     const char* klass_name =  method->method_holder()->name()->as_utf8();

   728     const char* method_name = method->name()->as_utf8();

   729     const char* signature = method->signature()->as_utf8();

   730     for (int i = 0; i < ci_method_data_records.length(); i++) {

   731       ciMethodDataRecord* rec = ci_method_data_records.at(i);

   732       if (strcmp(rec->klass, klass_name) == 0 &&

   733           strcmp(rec->method, method_name) == 0 &&

   734           strcmp(rec->signature, signature) == 0) {

   735         return rec;

   736       }

   737     }

   738     return NULL;

   739   }

   740 

   741   const char* error_message() {

   742     return _error_message;

   743   }

   744 

   745   void reset() {

   746     _error_message = NULL;

   747     ci_method_records.clear();

   748     ci_method_data_records.clear();

   749   }

   750 

   751   // Take an ascii string contain \u#### escapes and convert it to utf8

   752   // in place.

   753   static void unescape_string(char* value) {

   754     char* from = value;

   755     char* to = value;

   756     while (*from != '\0') {

   757       if (*from != '\\') {

   758         *from++ = *to++;

   759       } else {

   760         switch (from[1]) {

   761           case 'u': {

   762             from += 2;

   763             jchar value=0;

   764             for (int i=0; i<4; i++) {

   765               char c = *from++;

   766               switch (c) {

   767                 case '0': case '1': case '2': case '3': case '4':

   768                 case '5': case '6': case '7': case '8': case '9':

   769                   value = (value << 4) + c - '0';

   770                   break;

   771                 case 'a': case 'b': case 'c':

   772                 case 'd': case 'e': case 'f':

   773                   value = (value << 4) + 10 + c - 'a';

   774                   break;

   775                 case 'A': case 'B': case 'C':

   776                 case 'D': case 'E': case 'F':

   777                   value = (value << 4) + 10 + c - 'A';

   778                   break;

   779                 default:

   780                   ShouldNotReachHere();

   781               }

   782             }

   783             UNICODE::convert_to_utf8(&value, 1, to);

   784             to++;

   785             break;

   786           }

   787           case 't': *to++ = '\t'; from += 2; break;

   788           case 'n': *to++ = '\n'; from += 2; break;

   789           case 'r': *to++ = '\r'; from += 2; break;

   790           case 'f': *to++ = '\f'; from += 2; break;

   791           default:

   792             ShouldNotReachHere();

   793         }

   794       }

   795     }

   796     *from = *to;

   797   }

   798 };

   799 

   800 void ciReplay::replay(TRAPS) {

   801   int exit_code = replay_impl(THREAD);

   802 

   803   Threads::destroy_vm();

   804 

   805   vm_exit(exit_code);

   806 }

   807 

   808 int ciReplay::replay_impl(TRAPS) {

   809   HandleMark hm;

   810   ResourceMark rm;

   811   // Make sure we don't run with background compilation

   812   BackgroundCompilation = false;

   813 

   814   if (ReplaySuppressInitializers > 2) {

   815     // ReplaySuppressInitializers > 2 means that we want to allow

   816     // normal VM bootstrap but once we get into the replay itself

   817     // don't allow any intializers to be run.

   818     ReplaySuppressInitializers = 1;

   819   }

   820 

   821   // Load and parse the replay data

   822   CompileReplay rp(ReplayDataFile, THREAD);

   823   int exit_code = 0;

   824   if (rp.can_replay()) {

   825     rp.process(THREAD);

   826   } else {

   827     exit_code = 1;

   828     return exit_code;

   829   }

   830 

   831   if (HAS_PENDING_EXCEPTION) {

   832     oop throwable = PENDING_EXCEPTION;

   833     CLEAR_PENDING_EXCEPTION;

   834     java_lang_Throwable::print(throwable, tty);

   835     tty->cr();

   836     java_lang_Throwable::print_stack_trace(throwable, tty);

   837     tty->cr();

   838     exit_code = 2;

   839   }

   840 

   841   if (rp.had_error()) {

   842     tty->print_cr("Failed on %s", rp.error_message());

   843     exit_code = 1;

   844   }

   845   return exit_code;

   846 }

   847 

   848 

   849 void ciReplay::initialize(ciMethodData* m) {

   850   if (replay_state == NULL) {

   851     return;

   852   }

   853 

   854   ASSERT_IN_VM;

   855   ResourceMark rm;

   856 

   857   Method* method = m->get_MethodData()->method();

   858   ciMethodDataRecord* rec = replay_state->find_ciMethodDataRecord(method);

   859   if (rec == NULL) {

   860     // This indicates some mismatch with the original environment and

   861     // the replay environment though it's not always enough to

   862     // interfere with reproducing a bug

   863     tty->print_cr("Warning: requesting ciMethodData record for method with no data: ");

   864     method->print_name(tty);

   865     tty->cr();

   866   } else {

   867     m->_state = rec->state;

   868     m->_current_mileage = rec->current_mileage;

   869     if (rec->data_length != 0) {

   870       assert(m->_data_size == rec->data_length * (int)sizeof(rec->data[0]), "must agree");

   871 

   872       // Write the correct ciObjects back into the profile data

   873       ciEnv* env = ciEnv::current();

   874       for (int i = 0; i < rec->oops_length; i++) {

   875         KlassHandle *h = (KlassHandle *)rec->oops_handles[i];

   876         *(ciMetadata**)(rec->data + rec->oops_offsets[i]) =

   877           env->get_metadata((*h)());

   878       }

   879       // Copy the updated profile data into place as intptr_ts

   880 #ifdef _LP64

   881       Copy::conjoint_jlongs_atomic((jlong *)rec->data, (jlong *)m->_data, rec->data_length);

   882 #else

   883       Copy::conjoint_jints_atomic((jint *)rec->data, (jint *)m->_data, rec->data_length);

   884 #endif

   885     }

   886 

   887     // copy in the original header

   888     Copy::conjoint_jbytes(rec->orig_data, (char*)&m->_orig, rec->orig_data_length);

   889   }

   890 }

   891 

   892 

   893 bool ciReplay::should_not_inline(ciMethod* method) {

   894   if (replay_state == NULL) {

   895     return false;

   896   }

   897 

   898   VM_ENTRY_MARK;

   899   // ciMethod without a record shouldn't be inlined.

   900   return replay_state->find_ciMethodRecord(method->get_Method()) == NULL;

   901 }

   902 

   903 

   904 void ciReplay::initialize(ciMethod* m) {

   905   if (replay_state == NULL) {

   906     return;

   907   }

   908 

   909   ASSERT_IN_VM;

   910   ResourceMark rm;

   911 

   912   Method* method = m->get_Method();

   913   ciMethodRecord* rec = replay_state->find_ciMethodRecord(method);

   914   if (rec == NULL) {

   915     // This indicates some mismatch with the original environment and

   916     // the replay environment though it's not always enough to

   917     // interfere with reproducing a bug

   918     tty->print_cr("Warning: requesting ciMethod record for method with no data: ");

   919     method->print_name(tty);

   920     tty->cr();

   921   } else {

   922     // m->_instructions_size = rec->instructions_size;

   923     m->_instructions_size = -1;

   924     m->_interpreter_invocation_count = rec->interpreter_invocation_count;

   925     m->_interpreter_throwout_count = rec->interpreter_throwout_count;

   926     method->invocation_counter()->_counter = rec->invocation_counter;

   927     method->backedge_counter()->_counter = rec->backedge_counter;

   928   }

   929 }

   930 

   931 bool ciReplay::is_loaded(Method* method) {

   932   if (replay_state == NULL) {

   933     return true;

   934   }

   935 

   936   ASSERT_IN_VM;

   937   ResourceMark rm;

   938 

   939   ciMethodRecord* rec = replay_state->find_ciMethodRecord(method);

   940   return rec != NULL;

   941 }

   942 #endif