jdk8-mips64-public/hotspot: src/share/vm/prims/jvmtiClassFileReconstituter.cpp@427b2fb1944f

8189170: Add option to disable stack overflow checking in primordial thread for use with JNI_CreateJavaJVM
Reviewed-by: dcubed

     1 /*

     2  * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #include "precompiled.hpp"

    26 #include "classfile/symbolTable.hpp"

    27 #include "interpreter/bytecodeStream.hpp"

    28 #include "oops/fieldStreams.hpp"

    29 #include "prims/jvmtiClassFileReconstituter.hpp"

    30 #include "runtime/signature.hpp"

    31 #ifdef TARGET_ARCH_x86

    32 # include "bytes_x86.hpp"

    33 #endif

    34 #ifdef TARGET_ARCH_sparc

    35 # include "bytes_sparc.hpp"

    36 #endif

    37 #ifdef TARGET_ARCH_zero

    38 # include "bytes_zero.hpp"

    39 #endif

    40 #ifdef TARGET_ARCH_arm

    41 # include "bytes_arm.hpp"

    42 #endif

    43 #ifdef TARGET_ARCH_ppc

    44 # include "bytes_ppc.hpp"

    45 #endif

    46 // FIXME: add Deprecated attribute

    47 // FIXME: fix Synthetic attribute

    48 // FIXME: per Serguei, add error return handling for ConstantPool::copy_cpool_bytes()

    51 // Write the field information portion of ClassFile structure

    52 // JVMSpec|     u2 fields_count;

    53 // JVMSpec|     field_info fields[fields_count];

    54 void JvmtiClassFileReconstituter::write_field_infos() {

    55   HandleMark hm(thread());

    56   Array<AnnotationArray*>* fields_anno = ikh()->fields_annotations();

    57   Array<AnnotationArray*>* fields_type_anno = ikh()->fields_type_annotations();

    59   // Compute the real number of Java fields

    60   int java_fields = ikh()->java_fields_count();

    62   write_u2(java_fields);

    63   for (JavaFieldStream fs(ikh()); !fs.done(); fs.next()) {

    64     AccessFlags access_flags = fs.access_flags();

    65     int name_index = fs.name_index();

    66     int signature_index = fs.signature_index();

    67     int initial_value_index = fs.initval_index();

    68     guarantee(name_index != 0 && signature_index != 0, "bad constant pool index for field");

    69     // int offset = ikh()->field_offset( index );

    70     int generic_signature_index = fs.generic_signature_index();

    71     AnnotationArray* anno = fields_anno == NULL ? NULL : fields_anno->at(fs.index());

    72     AnnotationArray* type_anno = fields_type_anno == NULL ? NULL : fields_type_anno->at(fs.index());

    74     // JVMSpec|   field_info {

    75     // JVMSpec|         u2 access_flags;

    76     // JVMSpec|         u2 name_index;

    77     // JVMSpec|         u2 descriptor_index;

    78     // JVMSpec|         u2 attributes_count;

    79     // JVMSpec|         attribute_info attributes[attributes_count];

    80     // JVMSpec|   }

    82     write_u2(access_flags.as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);

    83     write_u2(name_index);

    84     write_u2(signature_index);

    85     int attr_count = 0;

    86     if (initial_value_index != 0) {

    87       ++attr_count;

    88     }

    89     if (access_flags.is_synthetic()) {

    90       // ++attr_count;

    91     }

    92     if (generic_signature_index != 0) {

    93       ++attr_count;

    94     }

    95     if (anno != NULL) {

    96       ++attr_count;     // has RuntimeVisibleAnnotations attribute

    97     }

    98     if (type_anno != NULL) {

    99       ++attr_count;     // has RuntimeVisibleTypeAnnotations attribute

   100     }

   102     write_u2(attr_count);

   104     if (initial_value_index != 0) {

   105       write_attribute_name_index("ConstantValue");

   106       write_u4(2); //length always 2

   107       write_u2(initial_value_index);

   108     }

   109     if (access_flags.is_synthetic()) {

   110       // write_synthetic_attribute();

   111     }

   112     if (generic_signature_index != 0) {

   113       write_signature_attribute(generic_signature_index);

   114     }

   115     if (anno != NULL) {

   116       write_annotations_attribute("RuntimeVisibleAnnotations", anno);

   117     }

   118     if (type_anno != NULL) {

   119       write_annotations_attribute("RuntimeVisibleTypeAnnotations", type_anno);

   120     }

   121   }

   122 }

   124 // Write Code attribute

   125 // JVMSpec|   Code_attribute {

   126 // JVMSpec|     u2 attribute_name_index;

   127 // JVMSpec|     u4 attribute_length;

   128 // JVMSpec|     u2 max_stack;

   129 // JVMSpec|     u2 max_locals;

   130 // JVMSpec|     u4 code_length;

   131 // JVMSpec|     u1 code[code_length];

   132 // JVMSpec|     u2 exception_table_length;

   133 // JVMSpec|     {       u2 start_pc;

   134 // JVMSpec|             u2 end_pc;

   135 // JVMSpec|             u2  handler_pc;

   136 // JVMSpec|             u2  catch_type;

   137 // JVMSpec|     }       exception_table[exception_table_length];

   138 // JVMSpec|     u2 attributes_count;

   139 // JVMSpec|     attribute_info attributes[attributes_count];

   140 // JVMSpec|   }

   141 void JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) {

   142   ConstMethod* const_method = method->constMethod();

   143   u2 line_num_cnt = 0;

   144   int stackmap_len = 0;

   145   int local_variable_table_length = 0;

   146   int local_variable_type_table_length = 0;

   148   // compute number and length of attributes

   149   int attr_count = 0;

   150   int attr_size = 0;

   151   if (const_method->has_linenumber_table()) {

   152     line_num_cnt = line_number_table_entries(method);

   153     if (line_num_cnt != 0) {

   154       ++attr_count;

   155       // Compute the complete size of the line number table attribute:

   156       //      LineNumberTable_attribute {

   157       //        u2 attribute_name_index;

   158       //        u4 attribute_length;

   159       //        u2 line_number_table_length;

   160       //        {  u2 start_pc;

   161       //           u2 line_number;

   162       //        } line_number_table[line_number_table_length];

   163       //      }

   164       attr_size += 2 + 4 + 2 + line_num_cnt * (2 + 2);

   165     }

   166   }

   167   if (method->has_stackmap_table()) {

   168     stackmap_len = method->stackmap_data()->length();

   169     if (stackmap_len != 0) {

   170       ++attr_count;

   171       // Compute the  size of the stack map table attribute (VM stores raw):

   172       //      StackMapTable_attribute {

   173       //        u2 attribute_name_index;

   174       //        u4 attribute_length;

   175       //        u2 number_of_entries;

   176       //        stack_map_frame_entries[number_of_entries];

   177       //      }

   178       attr_size += 2 + 4 + stackmap_len;

   179     }

   180   }

   181   if (method->has_localvariable_table()) {

   182     local_variable_table_length = method->localvariable_table_length();

   183     if (local_variable_table_length != 0) {

   184       ++attr_count;

   185       // Compute the size of the local variable table attribute (VM stores raw):

   186       // LocalVariableTable_attribute {

   187       //   u2 attribute_name_index;

   188       //   u4 attribute_length;

   189       //   u2 local_variable_table_length;

   190       //   {

   191       //     u2 start_pc;

   192       //     u2 length;

   193       //     u2 name_index;

   194       //     u2 descriptor_index;

   195       //     u2 index;

   196       //   }

   197       attr_size += 2 + 4 + 2 + local_variable_table_length * (2 + 2 + 2 + 2 + 2);

   199       // Local variables with generic signatures must have LVTT entries

   200       LocalVariableTableElement *elem = method->localvariable_table_start();

   201       for (int idx = 0; idx < local_variable_table_length; idx++) {

   202         if (elem[idx].signature_cp_index != 0) {

   203           local_variable_type_table_length++;

   204         }

   205       }

   207       if (local_variable_type_table_length != 0) {

   208         ++attr_count;

   209         // Compute the size of the local variable type table attribute (VM stores raw):

   210         // LocalVariableTypeTable_attribute {

   211         //   u2 attribute_name_index;

   212         //   u4 attribute_length;

   213         //   u2 local_variable_type_table_length;

   214         //   {

   215         //     u2 start_pc;

   216         //     u2 length;

   217         //     u2 name_index;

   218         //     u2 signature_index;

   219         //     u2 index;

   220         //   }

   221         attr_size += 2 + 4 + 2 + local_variable_type_table_length * (2 + 2 + 2 + 2 + 2);

   222       }

   223     }

   224   }

   226   ExceptionTable exception_table(method());

   227   int exception_table_length = exception_table.length();

   228   int code_size = const_method->code_size();

   229   int size =

   230     2+2+4 +                                // max_stack, max_locals, code_length

   231     code_size +                            // code

   232     2 +                                    // exception_table_length

   233     (2+2+2+2) * exception_table_length +   // exception_table

   234     2 +                                    // attributes_count

   235     attr_size;                             // attributes

   237   write_attribute_name_index("Code");

   238   write_u4(size);

   239   write_u2(method->verifier_max_stack());

   240   write_u2(method->max_locals());

   241   write_u4(code_size);

   242   copy_bytecodes(method, (unsigned char*)writeable_address(code_size));

   243   write_u2(exception_table_length);

   244   for (int index = 0; index < exception_table_length; index++) {

   245     write_u2(exception_table.start_pc(index));

   246     write_u2(exception_table.end_pc(index));

   247     write_u2(exception_table.handler_pc(index));

   248     write_u2(exception_table.catch_type_index(index));

   249   }

   250   write_u2(attr_count);

   251   if (line_num_cnt != 0) {

   252     write_line_number_table_attribute(method, line_num_cnt);

   253   }

   254   if (stackmap_len != 0) {

   255     write_stackmap_table_attribute(method, stackmap_len);

   256   }

   257   if (local_variable_table_length != 0) {

   258     write_local_variable_table_attribute(method, local_variable_table_length);

   259   }

   260   if (local_variable_type_table_length != 0) {

   261     write_local_variable_type_table_attribute(method, local_variable_type_table_length);

   262   }

   263 }

   265 // Write Exceptions attribute

   266 // JVMSpec|   Exceptions_attribute {

   267 // JVMSpec|     u2 attribute_name_index;

   268 // JVMSpec|     u4 attribute_length;

   269 // JVMSpec|     u2 number_of_exceptions;

   270 // JVMSpec|     u2 exception_index_table[number_of_exceptions];

   271 // JVMSpec|   }

   272 void JvmtiClassFileReconstituter::write_exceptions_attribute(ConstMethod* const_method) {

   273   CheckedExceptionElement* checked_exceptions = const_method->checked_exceptions_start();

   274   int checked_exceptions_length = const_method->checked_exceptions_length();

   275   int size =

   276     2 +                                    // number_of_exceptions

   277     2 * checked_exceptions_length;         // exception_index_table

   279   write_attribute_name_index("Exceptions");

   280   write_u4(size);

   281   write_u2(checked_exceptions_length);

   282   for (int index = 0; index < checked_exceptions_length; index++) {

   283     write_u2(checked_exceptions[index].class_cp_index);

   284   }

   285 }

   287 // Write SourceFile attribute

   288 // JVMSpec|   SourceFile_attribute {

   289 // JVMSpec|     u2 attribute_name_index;

   290 // JVMSpec|     u4 attribute_length;

   291 // JVMSpec|     u2 sourcefile_index;

   292 // JVMSpec|   }

   293 void JvmtiClassFileReconstituter::write_source_file_attribute() {

   294   assert(ikh()->source_file_name() != NULL, "caller must check");

   296   write_attribute_name_index("SourceFile");

   297   write_u4(2);  // always length 2

   298   write_u2(symbol_to_cpool_index(ikh()->source_file_name()));

   299 }

   301 // Write SourceDebugExtension attribute

   302 // JSR45|   SourceDebugExtension_attribute {

   303 // JSR45|       u2 attribute_name_index;

   304 // JSR45|       u4 attribute_length;

   305 // JSR45|       u1 debug_extension[attribute_length];

   306 // JSR45|   }

   307 void JvmtiClassFileReconstituter::write_source_debug_extension_attribute() {

   308   assert(ikh()->source_debug_extension() != NULL, "caller must check");

   310   write_attribute_name_index("SourceDebugExtension");

   311   int len = (int)strlen(ikh()->source_debug_extension());

   312   write_u4(len);

   313   u1* ext = (u1*)ikh()->source_debug_extension();

   314   for (int i=0; i<len; i++) {

   315     write_u1(ext[i]);

   316   }

   317 }

   319 // Write (generic) Signature attribute

   320 // JVMSpec|   Signature_attribute {

   321 // JVMSpec|     u2 attribute_name_index;

   322 // JVMSpec|     u4 attribute_length;

   323 // JVMSpec|     u2 signature_index;

   324 // JVMSpec|   }

   325 void JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) {

   326   write_attribute_name_index("Signature");

   327   write_u4(2);  // always length 2

   328   write_u2(generic_signature_index);

   329 }

   331 // Compute the number of entries in the InnerClasses attribute

   332 u2 JvmtiClassFileReconstituter::inner_classes_attribute_length() {

   333   InnerClassesIterator iter(ikh());

   334   return iter.length();

   335 }

   337 // Write an annotation attribute.  The VM stores them in raw form, so all we need

   338 // to do is add the attrubute name and fill in the length.

   339 // JSR202|   *Annotations_attribute {

   340 // JSR202|     u2 attribute_name_index;

   341 // JSR202|     u4 attribute_length;

   342 // JSR202|     ...

   343 // JSR202|   }

   344 void JvmtiClassFileReconstituter::write_annotations_attribute(const char* attr_name,

   345                                                               AnnotationArray* annos) {

   346   u4 length = annos->length();

   347   write_attribute_name_index(attr_name);

   348   write_u4(length);

   349   memcpy(writeable_address(length), annos->adr_at(0), length);

   350 }

   352 //  BootstrapMethods_attribute {

   353 //    u2 attribute_name_index;

   354 //    u4 attribute_length;

   355 //    u2 num_bootstrap_methods;

   356 //    {   u2 bootstrap_method_ref;

   357 //        u2 num_bootstrap_arguments;

   358 //        u2 bootstrap_arguments[num_bootstrap_arguments];

   359 //    } bootstrap_methods[num_bootstrap_methods];

   360 //  }

   361 void JvmtiClassFileReconstituter::write_bootstrapmethod_attribute() {

   362   Array<u2>* operands = cpool()->operands();

   363   write_attribute_name_index("BootstrapMethods");

   364   int num_bootstrap_methods = ConstantPool::operand_array_length(operands);

   366   // calculate length of attribute

   367   int length = sizeof(u2); // num_bootstrap_methods

   368   for (int n = 0; n < num_bootstrap_methods; n++) {

   369     u2 num_bootstrap_arguments = cpool()->operand_argument_count_at(n);

   370     length += sizeof(u2); // bootstrap_method_ref

   371     length += sizeof(u2); // num_bootstrap_arguments

   372     length += sizeof(u2) * num_bootstrap_arguments; // bootstrap_arguments[num_bootstrap_arguments]

   373   }

   374   write_u4(length);

   376   // write attribute

   377   write_u2(num_bootstrap_methods);

   378   for (int n = 0; n < num_bootstrap_methods; n++) {

   379     u2 bootstrap_method_ref = cpool()->operand_bootstrap_method_ref_index_at(n);

   380     u2 num_bootstrap_arguments = cpool()->operand_argument_count_at(n);

   381     write_u2(bootstrap_method_ref);

   382     write_u2(num_bootstrap_arguments);

   383     for (int arg = 0; arg < num_bootstrap_arguments; arg++) {

   384       u2 bootstrap_argument = cpool()->operand_argument_index_at(n, arg);

   385       write_u2(bootstrap_argument);

   386     }

   387   }

   388 }

   391 // Write InnerClasses attribute

   392 // JVMSpec|   InnerClasses_attribute {

   393 // JVMSpec|     u2 attribute_name_index;

   394 // JVMSpec|     u4 attribute_length;

   395 // JVMSpec|     u2 number_of_classes;

   396 // JVMSpec|     {  u2 inner_class_info_index;

   397 // JVMSpec|        u2 outer_class_info_index;

   398 // JVMSpec|        u2 inner_name_index;

   399 // JVMSpec|        u2 inner_class_access_flags;

   400 // JVMSpec|     } classes[number_of_classes];

   401 // JVMSpec|   }

   402 void JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) {

   403   InnerClassesIterator iter(ikh());

   404   guarantee(iter.length() != 0 && iter.length() == length,

   405             "caller must check");

   406   u2 entry_count = length / InstanceKlass::inner_class_next_offset;

   407   u4 size = 2 + entry_count * (2+2+2+2);

   409   write_attribute_name_index("InnerClasses");

   410   write_u4(size);

   411   write_u2(entry_count);

   412   for (; !iter.done(); iter.next()) {

   413     write_u2(iter.inner_class_info_index());

   414     write_u2(iter.outer_class_info_index());

   415     write_u2(iter.inner_name_index());

   416     write_u2(iter.inner_access_flags());

   417   }

   418 }

   420 // Write Synthetic attribute

   421 // JVMSpec|   Synthetic_attribute {

   422 // JVMSpec|     u2 attribute_name_index;

   423 // JVMSpec|     u4 attribute_length;

   424 // JVMSpec|   }

   425 void JvmtiClassFileReconstituter::write_synthetic_attribute() {

   426   write_attribute_name_index("Synthetic");

   427   write_u4(0); //length always zero

   428 }

   430 // Compute size of LineNumberTable

   431 u2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) {

   432   // The line number table is compressed so we don't know how big it is until decompressed.

   433   // Decompression is really fast so we just do it twice.

   434   u2 num_entries = 0;

   435   CompressedLineNumberReadStream stream(method->compressed_linenumber_table());

   436   while (stream.read_pair()) {

   437     num_entries++;

   438   }

   439   return num_entries;

   440 }

   442 // Write LineNumberTable attribute

   443 // JVMSpec|   LineNumberTable_attribute {

   444 // JVMSpec|     u2 attribute_name_index;

   445 // JVMSpec|     u4 attribute_length;

   446 // JVMSpec|     u2 line_number_table_length;

   447 // JVMSpec|     {  u2 start_pc;

   448 // JVMSpec|        u2 line_number;

   449 // JVMSpec|     } line_number_table[line_number_table_length];

   450 // JVMSpec|   }

   451 void JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method,

   452                                                                     u2 num_entries) {

   454   write_attribute_name_index("LineNumberTable");

   455   write_u4(2 + num_entries * (2 + 2));

   456   write_u2(num_entries);

   458   CompressedLineNumberReadStream stream(method->compressed_linenumber_table());

   459   while (stream.read_pair()) {

   460     write_u2(stream.bci());

   461     write_u2(stream.line());

   462   }

   463 }

   465 // Write LocalVariableTable attribute

   466 // JVMSpec|   LocalVariableTable_attribute {

   467 // JVMSpec|     u2 attribute_name_index;

   468 // JVMSpec|     u4 attribute_length;

   469 // JVMSpec|     u2 local_variable_table_length;

   470 // JVMSpec|     {  u2 start_pc;

   471 // JVMSpec|       u2 length;

   472 // JVMSpec|       u2 name_index;

   473 // JVMSpec|       u2 descriptor_index;

   474 // JVMSpec|       u2 index;

   475 // JVMSpec|     } local_variable_table[local_variable_table_length];

   476 // JVMSpec|   }

   477 void JvmtiClassFileReconstituter::write_local_variable_table_attribute(methodHandle method, u2 num_entries) {

   478     write_attribute_name_index("LocalVariableTable");

   479     write_u4(2 + num_entries * (2 + 2 + 2 + 2 + 2));

   480     write_u2(num_entries);

   482     assert(method->localvariable_table_length() == num_entries, "just checking");

   484     LocalVariableTableElement *elem = method->localvariable_table_start();

   485     for (int j=0; j<method->localvariable_table_length(); j++) {

   486       write_u2(elem->start_bci);

   487       write_u2(elem->length);

   488       write_u2(elem->name_cp_index);

   489       write_u2(elem->descriptor_cp_index);

   490       write_u2(elem->slot);

   491       elem++;

   492     }

   493 }

   495 // Write LocalVariableTypeTable attribute

   496 // JVMSpec|   LocalVariableTypeTable_attribute {

   497 // JVMSpec|     u2 attribute_name_index;

   498 // JVMSpec|     u4 attribute_length;

   499 // JVMSpec|     u2 local_variable_type_table_length;

   500 // JVMSpec|     { u2 start_pc;

   501 // JVMSpec|       u2 length;

   502 // JVMSpec|       u2 name_index;

   503 // JVMSpec|       u2 signature_index;

   504 // JVMSpec|       u2 index;

   505 // JVMSpec|     } local_variable_type_table[local_variable_type_table_length];

   506 // JVMSpec|   }

   507 void JvmtiClassFileReconstituter::write_local_variable_type_table_attribute(methodHandle method, u2 num_entries) {

   508     write_attribute_name_index("LocalVariableTypeTable");

   509     write_u4(2 + num_entries * (2 + 2 + 2 + 2 + 2));

   510     write_u2(num_entries);

   512     LocalVariableTableElement *elem = method->localvariable_table_start();

   513     for (int j=0; j<method->localvariable_table_length(); j++) {

   514       if (elem->signature_cp_index > 0) {

   515         // Local variable has a generic signature - write LVTT attribute entry

   516         write_u2(elem->start_bci);

   517         write_u2(elem->length);

   518         write_u2(elem->name_cp_index);

   519         write_u2(elem->signature_cp_index);

   520         write_u2(elem->slot);

   521         num_entries--;

   522       }

   523       elem++;

   524     }

   525     assert(num_entries == 0, "just checking");

   526 }

   528 // Write stack map table attribute

   529 // JSR-202|   StackMapTable_attribute {

   530 // JSR-202|     u2 attribute_name_index;

   531 // JSR-202|     u4 attribute_length;

   532 // JSR-202|     u2 number_of_entries;

   533 // JSR-202|     stack_map_frame_entries[number_of_entries];

   534 // JSR-202|   }

   535 void JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method,

   536                                                                  int stackmap_len) {

   538   write_attribute_name_index("StackMapTable");

   539   write_u4(stackmap_len);

   540   memcpy(

   541     writeable_address(stackmap_len),

   542     (void*)(method->stackmap_data()->adr_at(0)),

   543     stackmap_len);

   544 }

   546 // Write one method_info structure

   547 // JVMSpec|   method_info {

   548 // JVMSpec|     u2 access_flags;

   549 // JVMSpec|     u2 name_index;

   550 // JVMSpec|     u2 descriptor_index;

   551 // JVMSpec|     u2 attributes_count;

   552 // JVMSpec|     attribute_info attributes[attributes_count];

   553 // JVMSpec|   }

   554 void JvmtiClassFileReconstituter::write_method_info(methodHandle method) {

   555   AccessFlags access_flags = method->access_flags();

   556   ConstMethod* const_method = method->constMethod();

   557   u2 generic_signature_index = const_method->generic_signature_index();

   558   AnnotationArray* anno = method->annotations();

   559   AnnotationArray* param_anno = method->parameter_annotations();

   560   AnnotationArray* default_anno = method->annotation_default();

   561   AnnotationArray* type_anno = method->type_annotations();

   563   // skip generated default interface methods

   564   if (method->is_overpass()) {

   565     return;

   566   }

   568   write_u2(access_flags.get_flags() & JVM_RECOGNIZED_METHOD_MODIFIERS);

   569   write_u2(const_method->name_index());

   570   write_u2(const_method->signature_index());

   572   // write attributes in the same order javac does, so we can test with byte for

   573   // byte comparison

   574   int attr_count = 0;

   575   if (const_method->code_size() != 0) {

   576     ++attr_count;     // has Code attribute

   577   }

   578   if (const_method->has_checked_exceptions()) {

   579     ++attr_count;     // has Exceptions attribute

   580   }

   581   if (default_anno != NULL) {

   582     ++attr_count;     // has AnnotationDefault attribute

   583   }

   584   // Deprecated attribute would go here

   585   if (access_flags.is_synthetic()) { // FIXME

   586     // ++attr_count;

   587   }

   588   if (generic_signature_index != 0) {

   589     ++attr_count;

   590   }

   591   if (anno != NULL) {

   592     ++attr_count;     // has RuntimeVisibleAnnotations attribute

   593   }

   594   if (param_anno != NULL) {

   595     ++attr_count;     // has RuntimeVisibleParameterAnnotations attribute

   596   }

   597   if (type_anno != NULL) {

   598     ++attr_count;     // has RuntimeVisibleTypeAnnotations attribute

   599   }

   601   write_u2(attr_count);

   602   if (const_method->code_size() > 0) {

   603     write_code_attribute(method);

   604   }

   605   if (const_method->has_checked_exceptions()) {

   606     write_exceptions_attribute(const_method);

   607   }

   608   if (default_anno != NULL) {

   609     write_annotations_attribute("AnnotationDefault", default_anno);

   610   }

   611   // Deprecated attribute would go here

   612   if (access_flags.is_synthetic()) {

   613     // write_synthetic_attribute();

   614   }

   615   if (generic_signature_index != 0) {

   616     write_signature_attribute(generic_signature_index);

   617   }

   618   if (anno != NULL) {

   619     write_annotations_attribute("RuntimeVisibleAnnotations", anno);

   620   }

   621   if (param_anno != NULL) {

   622     write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno);

   623   }

   624   if (type_anno != NULL) {

   625     write_annotations_attribute("RuntimeVisibleTypeAnnotations", type_anno);

   626   }

   627 }

   629 // Write the class attributes portion of ClassFile structure

   630 // JVMSpec|     u2 attributes_count;

   631 // JVMSpec|     attribute_info attributes[attributes_count];

   632 void JvmtiClassFileReconstituter::write_class_attributes() {

   633   u2 inner_classes_length = inner_classes_attribute_length();

   634   Symbol* generic_signature = ikh()->generic_signature();

   635   AnnotationArray* anno = ikh()->class_annotations();

   636   AnnotationArray* type_anno = ikh()->class_type_annotations();

   638   int attr_count = 0;

   639   if (generic_signature != NULL) {

   640     ++attr_count;

   641   }

   642   if (ikh()->source_file_name() != NULL) {

   643     ++attr_count;

   644   }

   645   if (ikh()->source_debug_extension() != NULL) {

   646     ++attr_count;

   647   }

   648   if (inner_classes_length > 0) {

   649     ++attr_count;

   650   }

   651   if (anno != NULL) {

   652     ++attr_count;     // has RuntimeVisibleAnnotations attribute

   653   }

   654   if (type_anno != NULL) {

   655     ++attr_count;     // has RuntimeVisibleTypeAnnotations attribute

   656   }

   657   if (cpool()->operands() != NULL) {

   658     ++attr_count;

   659   }

   661   write_u2(attr_count);

   663   if (generic_signature != NULL) {

   664     write_signature_attribute(symbol_to_cpool_index(generic_signature));

   665   }

   666   if (ikh()->source_file_name() != NULL) {

   667     write_source_file_attribute();

   668   }

   669   if (ikh()->source_debug_extension() != NULL) {

   670     write_source_debug_extension_attribute();

   671   }

   672   if (inner_classes_length > 0) {

   673     write_inner_classes_attribute(inner_classes_length);

   674   }

   675   if (anno != NULL) {

   676     write_annotations_attribute("RuntimeVisibleAnnotations", anno);

   677   }

   678   if (type_anno != NULL) {

   679     write_annotations_attribute("RuntimeVisibleTypeAnnotations", type_anno);

   680   }

   681   if (cpool()->operands() != NULL) {

   682     write_bootstrapmethod_attribute();

   683   }

   684 }

   686 // Write the method information portion of ClassFile structure

   687 // JVMSpec|     u2 methods_count;

   688 // JVMSpec|     method_info methods[methods_count];

   689 void JvmtiClassFileReconstituter::write_method_infos() {

   690   HandleMark hm(thread());

   691   Array<Method*>* methods = ikh()->methods();

   692   int num_methods = methods->length();

   693   int num_overpass = 0;

   695   // count the generated default interface methods

   696   // these will not be re-created by write_method_info

   697   // and should not be included in the total count

   698   for (int index = 0; index < num_methods; index++) {

   699     Method* method = methods->at(index);

   700     if (method->is_overpass()) {

   701       num_overpass++;

   702     }

   703   }

   705   write_u2(num_methods - num_overpass);

   706   if (JvmtiExport::can_maintain_original_method_order()) {

   707     int index;

   708     int original_index;

   709     intArray method_order(num_methods, 0);

   711     // invert the method order mapping

   712     for (index = 0; index < num_methods; index++) {

   713       original_index = ikh()->method_ordering()->at(index);

   714       assert(original_index >= 0 && original_index < num_methods,

   715              "invalid original method index");

   716       method_order.at_put(original_index, index);

   717     }

   719     // write in original order

   720     for (original_index = 0; original_index < num_methods; original_index++) {

   721       index = method_order.at(original_index);

   722       methodHandle method(thread(), methods->at(index));

   723       write_method_info(method);

   724     }

   725   } else {

   726     // method order not preserved just dump the method infos

   727     for (int index = 0; index < num_methods; index++) {

   728       methodHandle method(thread(), methods->at(index));

   729       write_method_info(method);

   730     }

   731   }

   732 }

   734 void JvmtiClassFileReconstituter::write_class_file_format() {

   735   ReallocMark();

   737   // JVMSpec|   ClassFile {

   738   // JVMSpec|           u4 magic;

   739   write_u4(0xCAFEBABE);

   741   // JVMSpec|           u2 minor_version;

   742   // JVMSpec|           u2 major_version;

   743   write_u2(ikh()->minor_version());

   744   u2 major = ikh()->major_version();

   745   write_u2(major);

   747   // JVMSpec|           u2 constant_pool_count;

   748   // JVMSpec|           cp_info constant_pool[constant_pool_count-1];

   749   write_u2(cpool()->length());

   750   copy_cpool_bytes(writeable_address(cpool_size()));

   752   // JVMSpec|           u2 access_flags;

   753   write_u2(ikh()->access_flags().get_flags() & JVM_RECOGNIZED_CLASS_MODIFIERS);

   755   // JVMSpec|           u2 this_class;

   756   // JVMSpec|           u2 super_class;

   757   write_u2(class_symbol_to_cpool_index(ikh()->name()));

   758   Klass* super_class = ikh()->super();

   759   write_u2(super_class == NULL? 0 :  // zero for java.lang.Object

   760                 class_symbol_to_cpool_index(super_class->name()));

   762   // JVMSpec|           u2 interfaces_count;

   763   // JVMSpec|           u2 interfaces[interfaces_count];

   764   Array<Klass*>* interfaces =  ikh()->local_interfaces();

   765   int num_interfaces = interfaces->length();

   766   write_u2(num_interfaces);

   767   for (int index = 0; index < num_interfaces; index++) {

   768     HandleMark hm(thread());

   769     instanceKlassHandle iikh(thread(), interfaces->at(index));

   770     write_u2(class_symbol_to_cpool_index(iikh->name()));

   771   }

   773   // JVMSpec|           u2 fields_count;

   774   // JVMSpec|           field_info fields[fields_count];

   775   write_field_infos();

   777   // JVMSpec|           u2 methods_count;

   778   // JVMSpec|           method_info methods[methods_count];

   779   write_method_infos();

   781   // JVMSpec|           u2 attributes_count;

   782   // JVMSpec|           attribute_info attributes[attributes_count];

   783   // JVMSpec|   } /* end ClassFile 8?

   784   write_class_attributes();

   785 }

   787 address JvmtiClassFileReconstituter::writeable_address(size_t size) {

   788   size_t used_size = _buffer_ptr - _buffer;

   789   if (size + used_size >= _buffer_size) {

   790     // compute the new buffer size: must be at least twice as big as before

   791     // plus whatever new is being used; then convert to nice clean block boundary

   792     size_t new_buffer_size = (size + _buffer_size*2 + 1) / initial_buffer_size

   793                                                          * initial_buffer_size;

   795     // VM goes belly-up if the memory isn't available, so cannot do OOM processing

   796     _buffer = REALLOC_RESOURCE_ARRAY(u1, _buffer, _buffer_size, new_buffer_size);

   797     _buffer_size = new_buffer_size;

   798     _buffer_ptr = _buffer + used_size;

   799   }

   800   u1* ret_ptr = _buffer_ptr;

   801   _buffer_ptr += size;

   802   return ret_ptr;

   803 }

   805 void JvmtiClassFileReconstituter::write_attribute_name_index(const char* name) {

   806   TempNewSymbol sym = SymbolTable::probe(name, (int)strlen(name));

   807   assert(sym != NULL, "attribute name symbol not found");

   808   u2 attr_name_index = symbol_to_cpool_index(sym);

   809   assert(attr_name_index != 0, "attribute name symbol not in constant pool");

   810   write_u2(attr_name_index);

   811 }

   813 void JvmtiClassFileReconstituter::write_u1(u1 x) {

   814   *writeable_address(1) = x;

   815 }

   817 void JvmtiClassFileReconstituter::write_u2(u2 x) {

   818   Bytes::put_Java_u2(writeable_address(2), x);

   819 }

   821 void JvmtiClassFileReconstituter::write_u4(u4 x) {

   822   Bytes::put_Java_u4(writeable_address(4), x);

   823 }

   825 void JvmtiClassFileReconstituter::write_u8(u8 x) {

   826   Bytes::put_Java_u8(writeable_address(8), x);

   827 }

   829 void JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh,

   830                                                  unsigned char* bytecodes) {

   831   // use a BytecodeStream to iterate over the bytecodes. JVM/fast bytecodes

   832   // and the breakpoint bytecode are converted to their original bytecodes.

   834   BytecodeStream bs(mh);

   836   unsigned char* p = bytecodes;

   837   Bytecodes::Code code;

   838   bool is_rewritten = mh->method_holder()->is_rewritten();

   840   while ((code = bs.next()) >= 0) {

   841     assert(Bytecodes::is_java_code(code), "sanity check");

   842     assert(code != Bytecodes::_breakpoint, "sanity check");

   844     // length of bytecode (mnemonic + operands)

   845     address bcp = bs.bcp();

   846     int     len = bs.instruction_size();

   847     assert(len > 0, "length must be > 0");

   849     // copy the bytecodes

   850     *p = (unsigned char) (bs.is_wide()? Bytecodes::_wide : code);

   851     if (len > 1) {

   852       memcpy(p+1, bcp+1, len-1);

   853     }

   855     // During linking the get/put and invoke instructions are rewritten

   856     // with an index into the constant pool cache. The original constant

   857     // pool index must be returned to caller.  Rewrite the index.

   858     if (is_rewritten && len > 1) {

   859       bool is_wide = false;

   860       switch (code) {

   861       case Bytecodes::_getstatic       :  // fall through

   862       case Bytecodes::_putstatic       :  // fall through

   863       case Bytecodes::_getfield        :  // fall through

   864       case Bytecodes::_putfield        :  // fall through

   865       case Bytecodes::_invokevirtual   :  // fall through

   866       case Bytecodes::_invokespecial   :  // fall through

   867       case Bytecodes::_invokestatic    :  // fall through

   868       case Bytecodes::_invokedynamic   :  // fall through

   869       case Bytecodes::_invokeinterface : {

   870         assert(len == 3 ||

   871                (code == Bytecodes::_invokeinterface && len == 5) ||

   872                (code == Bytecodes::_invokedynamic   && len == 5),

   873                "sanity check");

   875         int cpci = Bytes::get_native_u2(bcp+1);

   876         bool is_invokedynamic = (EnableInvokeDynamic && code == Bytecodes::_invokedynamic);

   877         ConstantPoolCacheEntry* entry;

   878         if (is_invokedynamic) {

   879           cpci = Bytes::get_native_u4(bcp+1);

   880           entry = mh->constants()->invokedynamic_cp_cache_entry_at(cpci);

   881         } else {

   882         // cache cannot be pre-fetched since some classes won't have it yet

   883           entry = mh->constants()->cache()->entry_at(cpci);

   884         }

   885         int i = entry->constant_pool_index();

   886         assert(i < mh->constants()->length(), "sanity check");

   887         Bytes::put_Java_u2((address)(p+1), (u2)i);     // java byte ordering

   888         if (is_invokedynamic)  *(p+3) = *(p+4) = 0;

   889         break;

   890       }

   891       case Bytecodes::_ldc_w:

   892         is_wide = true; // fall through

   893       case Bytecodes::_ldc: {

   894         if (bs.raw_code() == Bytecodes::_fast_aldc || bs.raw_code() == Bytecodes::_fast_aldc_w) {

   895           int cpci = is_wide ? Bytes::get_native_u2(bcp+1) : (u1)(*(bcp+1));

   896           int i = mh->constants()->object_to_cp_index(cpci);

   897           assert(i < mh->constants()->length(), "sanity check");

   898           if (is_wide) {

   899             Bytes::put_Java_u2((address)(p+1), (u2)i);     // java byte ordering

   900           } else {

   901             *(p+1) = (u1)i;

   902           }

   903         }

   904         break;

   905         }

   906       }

   907     }

   909     p += len;

   910   }

   911 }

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/prims/jvmtiClassFileReconstituter.cpp@427b2fb1944f

src/share/vm/prims/jvmtiClassFileReconstituter.cpp