jdk8-mips64-public/hotspot: src/share/vm/prims/jvmtiClassFileReconstituter.cpp@eef07cd490d4

     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 /*

    26  * This file has been modified by Loongson Technology in 2015. These

    27  * modifications are Copyright (c) 2015 Loongson Technology, and are made

    28  * available on the same license terms set forth above.

    29  */

    31 #include "precompiled.hpp"

    32 #include "classfile/symbolTable.hpp"

    33 #include "interpreter/bytecodeStream.hpp"

    34 #include "oops/fieldStreams.hpp"

    35 #include "prims/jvmtiClassFileReconstituter.hpp"

    36 #include "runtime/signature.hpp"

    37 #ifdef TARGET_ARCH_x86

    38 # include "bytes_x86.hpp"

    39 #endif

    40 #ifdef TARGET_ARCH_sparc

    41 # include "bytes_sparc.hpp"

    42 #endif

    43 #ifdef TARGET_ARCH_zero

    44 # include "bytes_zero.hpp"

    45 #endif

    46 #ifdef TARGET_ARCH_arm

    47 # include "bytes_arm.hpp"

    48 #endif

    49 #ifdef TARGET_ARCH_ppc

    50 # include "bytes_ppc.hpp"

    51 #endif

    52 #ifdef TARGET_ARCH_mips

    53 # include "bytes_mips.hpp"

    54 #endif

    55 // FIXME: add Deprecated attribute

    56 // FIXME: fix Synthetic attribute

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

    60 // Write the field information portion of ClassFile structure

    61 // JVMSpec|     u2 fields_count;

    62 // JVMSpec|     field_info fields[fields_count];

    63 void JvmtiClassFileReconstituter::write_field_infos() {

    64   HandleMark hm(thread());

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

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

    68   // Compute the real number of Java fields

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

    71   write_u2(java_fields);

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

    73     AccessFlags access_flags = fs.access_flags();

    74     int name_index = fs.name_index();

    75     int signature_index = fs.signature_index();

    76     int initial_value_index = fs.initval_index();

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

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

    79     int generic_signature_index = fs.generic_signature_index();

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

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

    83     // JVMSpec|   field_info {

    84     // JVMSpec|         u2 access_flags;

    85     // JVMSpec|         u2 name_index;

    86     // JVMSpec|         u2 descriptor_index;

    87     // JVMSpec|         u2 attributes_count;

    88     // JVMSpec|         attribute_info attributes[attributes_count];

    89     // JVMSpec|   }

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

    92     write_u2(name_index);

    93     write_u2(signature_index);

    94     int attr_count = 0;

    95     if (initial_value_index != 0) {

    96       ++attr_count;

    97     }

    98     if (access_flags.is_synthetic()) {

    99       // ++attr_count;

   100     }

   101     if (generic_signature_index != 0) {

   102       ++attr_count;

   103     }

   104     if (anno != NULL) {

   105       ++attr_count;     // has RuntimeVisibleAnnotations attribute

   106     }

   107     if (type_anno != NULL) {

   108       ++attr_count;     // has RuntimeVisibleTypeAnnotations attribute

   109     }

   111     write_u2(attr_count);

   113     if (initial_value_index != 0) {

   114       write_attribute_name_index("ConstantValue");

   115       write_u4(2); //length always 2

   116       write_u2(initial_value_index);

   117     }

   118     if (access_flags.is_synthetic()) {

   119       // write_synthetic_attribute();

   120     }

   121     if (generic_signature_index != 0) {

   122       write_signature_attribute(generic_signature_index);

   123     }

   124     if (anno != NULL) {

   125       write_annotations_attribute("RuntimeVisibleAnnotations", anno);

   126     }

   127     if (type_anno != NULL) {

   128       write_annotations_attribute("RuntimeVisibleTypeAnnotations", type_anno);

   129     }

   130   }

   131 }

   133 // Write Code attribute

   134 // JVMSpec|   Code_attribute {

   135 // JVMSpec|     u2 attribute_name_index;

   136 // JVMSpec|     u4 attribute_length;

   137 // JVMSpec|     u2 max_stack;

   138 // JVMSpec|     u2 max_locals;

   139 // JVMSpec|     u4 code_length;

   140 // JVMSpec|     u1 code[code_length];

   141 // JVMSpec|     u2 exception_table_length;

   142 // JVMSpec|     {       u2 start_pc;

   143 // JVMSpec|             u2 end_pc;

   144 // JVMSpec|             u2  handler_pc;

   145 // JVMSpec|             u2  catch_type;

   146 // JVMSpec|     }       exception_table[exception_table_length];

   147 // JVMSpec|     u2 attributes_count;

   148 // JVMSpec|     attribute_info attributes[attributes_count];

   149 // JVMSpec|   }

   150 void JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) {

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

   152   u2 line_num_cnt = 0;

   153   int stackmap_len = 0;

   154   int local_variable_table_length = 0;

   155   int local_variable_type_table_length = 0;

   157   // compute number and length of attributes

   158   int attr_count = 0;

   159   int attr_size = 0;

   160   if (const_method->has_linenumber_table()) {

   161     line_num_cnt = line_number_table_entries(method);

   162     if (line_num_cnt != 0) {

   163       ++attr_count;

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

   165       //      LineNumberTable_attribute {

   166       //        u2 attribute_name_index;

   167       //        u4 attribute_length;

   168       //        u2 line_number_table_length;

   169       //        {  u2 start_pc;

   170       //           u2 line_number;

   171       //        } line_number_table[line_number_table_length];

   172       //      }

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

   174     }

   175   }

   176   if (method->has_stackmap_table()) {

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

   178     if (stackmap_len != 0) {

   179       ++attr_count;

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

   181       //      StackMapTable_attribute {

   182       //        u2 attribute_name_index;

   183       //        u4 attribute_length;

   184       //        u2 number_of_entries;

   185       //        stack_map_frame_entries[number_of_entries];

   186       //      }

   187       attr_size += 2 + 4 + stackmap_len;

   188     }

   189   }

   190   if (method->has_localvariable_table()) {

   191     local_variable_table_length = method->localvariable_table_length();

   192     if (local_variable_table_length != 0) {

   193       ++attr_count;

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

   195       // LocalVariableTable_attribute {

   196       //   u2 attribute_name_index;

   197       //   u4 attribute_length;

   198       //   u2 local_variable_table_length;

   199       //   {

   200       //     u2 start_pc;

   201       //     u2 length;

   202       //     u2 name_index;

   203       //     u2 descriptor_index;

   204       //     u2 index;

   205       //   }

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

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

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

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

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

   212           local_variable_type_table_length++;

   213         }

   214       }

   216       if (local_variable_type_table_length != 0) {

   217         ++attr_count;

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

   219         // LocalVariableTypeTable_attribute {

   220         //   u2 attribute_name_index;

   221         //   u4 attribute_length;

   222         //   u2 local_variable_type_table_length;

   223         //   {

   224         //     u2 start_pc;

   225         //     u2 length;

   226         //     u2 name_index;

   227         //     u2 signature_index;

   228         //     u2 index;

   229         //   }

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

   231       }

   232     }

   233   }

   235   ExceptionTable exception_table(method());

   236   int exception_table_length = exception_table.length();

   237   int code_size = const_method->code_size();

   238   int size =

   239     2+2+4 +                                // max_stack, max_locals, code_length

   240     code_size +                            // code

   241     2 +                                    // exception_table_length

   242     (2+2+2+2) * exception_table_length +   // exception_table

   243     2 +                                    // attributes_count

   244     attr_size;                             // attributes

   246   write_attribute_name_index("Code");

   247   write_u4(size);

   248   write_u2(method->verifier_max_stack());

   249   write_u2(method->max_locals());

   250   write_u4(code_size);

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

   252   write_u2(exception_table_length);

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

   254     write_u2(exception_table.start_pc(index));

   255     write_u2(exception_table.end_pc(index));

   256     write_u2(exception_table.handler_pc(index));

   257     write_u2(exception_table.catch_type_index(index));

   258   }

   259   write_u2(attr_count);

   260   if (line_num_cnt != 0) {

   261     write_line_number_table_attribute(method, line_num_cnt);

   262   }

   263   if (stackmap_len != 0) {

   264     write_stackmap_table_attribute(method, stackmap_len);

   265   }

   266   if (local_variable_table_length != 0) {

   267     write_local_variable_table_attribute(method, local_variable_table_length);

   268   }

   269   if (local_variable_type_table_length != 0) {

   270     write_local_variable_type_table_attribute(method, local_variable_type_table_length);

   271   }

   272 }

   274 // Write Exceptions attribute

   275 // JVMSpec|   Exceptions_attribute {

   276 // JVMSpec|     u2 attribute_name_index;

   277 // JVMSpec|     u4 attribute_length;

   278 // JVMSpec|     u2 number_of_exceptions;

   279 // JVMSpec|     u2 exception_index_table[number_of_exceptions];

   280 // JVMSpec|   }

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

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

   283   int checked_exceptions_length = const_method->checked_exceptions_length();

   284   int size =

   285     2 +                                    // number_of_exceptions

   286     2 * checked_exceptions_length;         // exception_index_table

   288   write_attribute_name_index("Exceptions");

   289   write_u4(size);

   290   write_u2(checked_exceptions_length);

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

   292     write_u2(checked_exceptions[index].class_cp_index);

   293   }

   294 }

   296 // Write SourceFile attribute

   297 // JVMSpec|   SourceFile_attribute {

   298 // JVMSpec|     u2 attribute_name_index;

   299 // JVMSpec|     u4 attribute_length;

   300 // JVMSpec|     u2 sourcefile_index;

   301 // JVMSpec|   }

   302 void JvmtiClassFileReconstituter::write_source_file_attribute() {

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

   305   write_attribute_name_index("SourceFile");

   306   write_u4(2);  // always length 2

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

   308 }

   310 // Write SourceDebugExtension attribute

   311 // JSR45|   SourceDebugExtension_attribute {

   312 // JSR45|       u2 attribute_name_index;

   313 // JSR45|       u4 attribute_length;

   314 // JSR45|       u1 debug_extension[attribute_length];

   315 // JSR45|   }

   316 void JvmtiClassFileReconstituter::write_source_debug_extension_attribute() {

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

   319   write_attribute_name_index("SourceDebugExtension");

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

   321   write_u4(len);

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

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

   324     write_u1(ext[i]);

   325   }

   326 }

   328 // Write (generic) Signature attribute

   329 // JVMSpec|   Signature_attribute {

   330 // JVMSpec|     u2 attribute_name_index;

   331 // JVMSpec|     u4 attribute_length;

   332 // JVMSpec|     u2 signature_index;

   333 // JVMSpec|   }

   334 void JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) {

   335   write_attribute_name_index("Signature");

   336   write_u4(2);  // always length 2

   337   write_u2(generic_signature_index);

   338 }

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

   341 u2 JvmtiClassFileReconstituter::inner_classes_attribute_length() {

   342   InnerClassesIterator iter(ikh());

   343   return iter.length();

   344 }

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

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

   348 // JSR202|   *Annotations_attribute {

   349 // JSR202|     u2 attribute_name_index;

   350 // JSR202|     u4 attribute_length;

   351 // JSR202|     ...

   352 // JSR202|   }

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

   354                                                               AnnotationArray* annos) {

   355   u4 length = annos->length();

   356   write_attribute_name_index(attr_name);

   357   write_u4(length);

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

   359 }

   361 //  BootstrapMethods_attribute {

   362 //    u2 attribute_name_index;

   363 //    u4 attribute_length;

   364 //    u2 num_bootstrap_methods;

   365 //    {   u2 bootstrap_method_ref;

   366 //        u2 num_bootstrap_arguments;

   367 //        u2 bootstrap_arguments[num_bootstrap_arguments];

   368 //    } bootstrap_methods[num_bootstrap_methods];

   369 //  }

   370 void JvmtiClassFileReconstituter::write_bootstrapmethod_attribute() {

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

   372   write_attribute_name_index("BootstrapMethods");

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

   375   // calculate length of attribute

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

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

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

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

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

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

   382   }

   383   write_u4(length);

   385   // write attribute

   386   write_u2(num_bootstrap_methods);

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

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

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

   390     write_u2(bootstrap_method_ref);

   391     write_u2(num_bootstrap_arguments);

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

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

   394       write_u2(bootstrap_argument);

   395     }

   396   }

   397 }

   400 // Write InnerClasses attribute

   401 // JVMSpec|   InnerClasses_attribute {

   402 // JVMSpec|     u2 attribute_name_index;

   403 // JVMSpec|     u4 attribute_length;

   404 // JVMSpec|     u2 number_of_classes;

   405 // JVMSpec|     {  u2 inner_class_info_index;

   406 // JVMSpec|        u2 outer_class_info_index;

   407 // JVMSpec|        u2 inner_name_index;

   408 // JVMSpec|        u2 inner_class_access_flags;

   409 // JVMSpec|     } classes[number_of_classes];

   410 // JVMSpec|   }

   411 void JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) {

   412   InnerClassesIterator iter(ikh());

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

   414             "caller must check");

   415   u2 entry_count = length / InstanceKlass::inner_class_next_offset;

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

   418   write_attribute_name_index("InnerClasses");

   419   write_u4(size);

   420   write_u2(entry_count);

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

   422     write_u2(iter.inner_class_info_index());

   423     write_u2(iter.outer_class_info_index());

   424     write_u2(iter.inner_name_index());

   425     write_u2(iter.inner_access_flags());

   426   }

   427 }

   429 // Write Synthetic attribute

   430 // JVMSpec|   Synthetic_attribute {

   431 // JVMSpec|     u2 attribute_name_index;

   432 // JVMSpec|     u4 attribute_length;

   433 // JVMSpec|   }

   434 void JvmtiClassFileReconstituter::write_synthetic_attribute() {

   435   write_attribute_name_index("Synthetic");

   436   write_u4(0); //length always zero

   437 }

   439 // Compute size of LineNumberTable

   440 u2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) {

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

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

   443   u2 num_entries = 0;

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

   445   while (stream.read_pair()) {

   446     num_entries++;

   447   }

   448   return num_entries;

   449 }

   451 // Write LineNumberTable attribute

   452 // JVMSpec|   LineNumberTable_attribute {

   453 // JVMSpec|     u2 attribute_name_index;

   454 // JVMSpec|     u4 attribute_length;

   455 // JVMSpec|     u2 line_number_table_length;

   456 // JVMSpec|     {  u2 start_pc;

   457 // JVMSpec|        u2 line_number;

   458 // JVMSpec|     } line_number_table[line_number_table_length];

   459 // JVMSpec|   }

   460 void JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method,

   461                                                                     u2 num_entries) {

   463   write_attribute_name_index("LineNumberTable");

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

   465   write_u2(num_entries);

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

   468   while (stream.read_pair()) {

   469     write_u2(stream.bci());

   470     write_u2(stream.line());

   471   }

   472 }

   474 // Write LocalVariableTable attribute

   475 // JVMSpec|   LocalVariableTable_attribute {

   476 // JVMSpec|     u2 attribute_name_index;

   477 // JVMSpec|     u4 attribute_length;

   478 // JVMSpec|     u2 local_variable_table_length;

   479 // JVMSpec|     {  u2 start_pc;

   480 // JVMSpec|       u2 length;

   481 // JVMSpec|       u2 name_index;

   482 // JVMSpec|       u2 descriptor_index;

   483 // JVMSpec|       u2 index;

   484 // JVMSpec|     } local_variable_table[local_variable_table_length];

   485 // JVMSpec|   }

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

   487     write_attribute_name_index("LocalVariableTable");

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

   489     write_u2(num_entries);

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

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

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

   495       write_u2(elem->start_bci);

   496       write_u2(elem->length);

   497       write_u2(elem->name_cp_index);

   498       write_u2(elem->descriptor_cp_index);

   499       write_u2(elem->slot);

   500       elem++;

   501     }

   502 }

   504 // Write LocalVariableTypeTable attribute

   505 // JVMSpec|   LocalVariableTypeTable_attribute {

   506 // JVMSpec|     u2 attribute_name_index;

   507 // JVMSpec|     u4 attribute_length;

   508 // JVMSpec|     u2 local_variable_type_table_length;

   509 // JVMSpec|     { u2 start_pc;

   510 // JVMSpec|       u2 length;

   511 // JVMSpec|       u2 name_index;

   512 // JVMSpec|       u2 signature_index;

   513 // JVMSpec|       u2 index;

   514 // JVMSpec|     } local_variable_type_table[local_variable_type_table_length];

   515 // JVMSpec|   }

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

   517     write_attribute_name_index("LocalVariableTypeTable");

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

   519     write_u2(num_entries);

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

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

   523       if (elem->signature_cp_index > 0) {

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

   525         write_u2(elem->start_bci);

   526         write_u2(elem->length);

   527         write_u2(elem->name_cp_index);

   528         write_u2(elem->signature_cp_index);

   529         write_u2(elem->slot);

   530         num_entries--;

   531       }

   532       elem++;

   533     }

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

   535 }

   537 // Write stack map table attribute

   538 // JSR-202|   StackMapTable_attribute {

   539 // JSR-202|     u2 attribute_name_index;

   540 // JSR-202|     u4 attribute_length;

   541 // JSR-202|     u2 number_of_entries;

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

   543 // JSR-202|   }

   544 void JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method,

   545                                                                  int stackmap_len) {

   547   write_attribute_name_index("StackMapTable");

   548   write_u4(stackmap_len);

   549   memcpy(

   550     writeable_address(stackmap_len),

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

   552     stackmap_len);

   553 }

   555 // Write one method_info structure

   556 // JVMSpec|   method_info {

   557 // JVMSpec|     u2 access_flags;

   558 // JVMSpec|     u2 name_index;

   559 // JVMSpec|     u2 descriptor_index;

   560 // JVMSpec|     u2 attributes_count;

   561 // JVMSpec|     attribute_info attributes[attributes_count];

   562 // JVMSpec|   }

   563 void JvmtiClassFileReconstituter::write_method_info(methodHandle method) {

   564   AccessFlags access_flags = method->access_flags();

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

   566   u2 generic_signature_index = const_method->generic_signature_index();

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

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

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

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

   572   // skip generated default interface methods

   573   if (method->is_overpass()) {

   574     return;

   575   }

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

   578   write_u2(const_method->name_index());

   579   write_u2(const_method->signature_index());

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

   582   // byte comparison

   583   int attr_count = 0;

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

   585     ++attr_count;     // has Code attribute

   586   }

   587   if (const_method->has_checked_exceptions()) {

   588     ++attr_count;     // has Exceptions attribute

   589   }

   590   if (default_anno != NULL) {

   591     ++attr_count;     // has AnnotationDefault attribute

   592   }

   593   // Deprecated attribute would go here

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

   595     // ++attr_count;

   596   }

   597   if (generic_signature_index != 0) {

   598     ++attr_count;

   599   }

   600   if (anno != NULL) {

   601     ++attr_count;     // has RuntimeVisibleAnnotations attribute

   602   }

   603   if (param_anno != NULL) {

   604     ++attr_count;     // has RuntimeVisibleParameterAnnotations attribute

   605   }

   606   if (type_anno != NULL) {

   607     ++attr_count;     // has RuntimeVisibleTypeAnnotations attribute

   608   }

   610   write_u2(attr_count);

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

   612     write_code_attribute(method);

   613   }

   614   if (const_method->has_checked_exceptions()) {

   615     write_exceptions_attribute(const_method);

   616   }

   617   if (default_anno != NULL) {

   618     write_annotations_attribute("AnnotationDefault", default_anno);

   619   }

   620   // Deprecated attribute would go here

   621   if (access_flags.is_synthetic()) {

   622     // write_synthetic_attribute();

   623   }

   624   if (generic_signature_index != 0) {

   625     write_signature_attribute(generic_signature_index);

   626   }

   627   if (anno != NULL) {

   628     write_annotations_attribute("RuntimeVisibleAnnotations", anno);

   629   }

   630   if (param_anno != NULL) {

   631     write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno);

   632   }

   633   if (type_anno != NULL) {

   634     write_annotations_attribute("RuntimeVisibleTypeAnnotations", type_anno);

   635   }

   636 }

   638 // Write the class attributes portion of ClassFile structure

   639 // JVMSpec|     u2 attributes_count;

   640 // JVMSpec|     attribute_info attributes[attributes_count];

   641 void JvmtiClassFileReconstituter::write_class_attributes() {

   642   u2 inner_classes_length = inner_classes_attribute_length();

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

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

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

   647   int attr_count = 0;

   648   if (generic_signature != NULL) {

   649     ++attr_count;

   650   }

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

   652     ++attr_count;

   653   }

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

   655     ++attr_count;

   656   }

   657   if (inner_classes_length > 0) {

   658     ++attr_count;

   659   }

   660   if (anno != NULL) {

   661     ++attr_count;     // has RuntimeVisibleAnnotations attribute

   662   }

   663   if (type_anno != NULL) {

   664     ++attr_count;     // has RuntimeVisibleTypeAnnotations attribute

   665   }

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

   667     ++attr_count;

   668   }

   670   write_u2(attr_count);

   672   if (generic_signature != NULL) {

   673     write_signature_attribute(symbol_to_cpool_index(generic_signature));

   674   }

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

   676     write_source_file_attribute();

   677   }

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

   679     write_source_debug_extension_attribute();

   680   }

   681   if (inner_classes_length > 0) {

   682     write_inner_classes_attribute(inner_classes_length);

   683   }

   684   if (anno != NULL) {

   685     write_annotations_attribute("RuntimeVisibleAnnotations", anno);

   686   }

   687   if (type_anno != NULL) {

   688     write_annotations_attribute("RuntimeVisibleTypeAnnotations", type_anno);

   689   }

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

   691     write_bootstrapmethod_attribute();

   692   }

   693 }

   695 // Write the method information portion of ClassFile structure

   696 // JVMSpec|     u2 methods_count;

   697 // JVMSpec|     method_info methods[methods_count];

   698 void JvmtiClassFileReconstituter::write_method_infos() {

   699   HandleMark hm(thread());

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

   701   int num_methods = methods->length();

   702   int num_overpass = 0;

   704   // count the generated default interface methods

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

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

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

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

   709     if (method->is_overpass()) {

   710       num_overpass++;

   711     }

   712   }

   714   write_u2(num_methods - num_overpass);

   715   if (JvmtiExport::can_maintain_original_method_order()) {

   716     int index;

   717     int original_index;

   718     intArray method_order(num_methods, 0);

   720     // invert the method order mapping

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

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

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

   724              "invalid original method index");

   725       method_order.at_put(original_index, index);

   726     }

   728     // write in original order

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

   730       index = method_order.at(original_index);

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

   732       write_method_info(method);

   733     }

   734   } else {

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

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

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

   738       write_method_info(method);

   739     }

   740   }

   741 }

   743 void JvmtiClassFileReconstituter::write_class_file_format() {

   744   ReallocMark();

   746   // JVMSpec|   ClassFile {

   747   // JVMSpec|           u4 magic;

   748   write_u4(0xCAFEBABE);

   750   // JVMSpec|           u2 minor_version;

   751   // JVMSpec|           u2 major_version;

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

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

   754   write_u2(major);

   756   // JVMSpec|           u2 constant_pool_count;

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

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

   759   copy_cpool_bytes(writeable_address(cpool_size()));

   761   // JVMSpec|           u2 access_flags;

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

   764   // JVMSpec|           u2 this_class;

   765   // JVMSpec|           u2 super_class;

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

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

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

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

   771   // JVMSpec|           u2 interfaces_count;

   772   // JVMSpec|           u2 interfaces[interfaces_count];

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

   774   int num_interfaces = interfaces->length();

   775   write_u2(num_interfaces);

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

   777     HandleMark hm(thread());

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

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

   780   }

   782   // JVMSpec|           u2 fields_count;

   783   // JVMSpec|           field_info fields[fields_count];

   784   write_field_infos();

   786   // JVMSpec|           u2 methods_count;

   787   // JVMSpec|           method_info methods[methods_count];

   788   write_method_infos();

   790   // JVMSpec|           u2 attributes_count;

   791   // JVMSpec|           attribute_info attributes[attributes_count];

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

   793   write_class_attributes();

   794 }

   796 address JvmtiClassFileReconstituter::writeable_address(size_t size) {

   797   size_t used_size = _buffer_ptr - _buffer;

   798   if (size + used_size >= _buffer_size) {

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

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

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

   802                                                          * initial_buffer_size;

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

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

   806     _buffer_size = new_buffer_size;

   807     _buffer_ptr = _buffer + used_size;

   808   }

   809   u1* ret_ptr = _buffer_ptr;

   810   _buffer_ptr += size;

   811   return ret_ptr;

   812 }

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

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

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

   817   u2 attr_name_index = symbol_to_cpool_index(sym);

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

   819   write_u2(attr_name_index);

   820 }

   822 void JvmtiClassFileReconstituter::write_u1(u1 x) {

   823   *writeable_address(1) = x;

   824 }

   826 void JvmtiClassFileReconstituter::write_u2(u2 x) {

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

   828 }

   830 void JvmtiClassFileReconstituter::write_u4(u4 x) {

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

   832 }

   834 void JvmtiClassFileReconstituter::write_u8(u8 x) {

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

   836 }

   838 void JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh,

   839                                                  unsigned char* bytecodes) {

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

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

   843   BytecodeStream bs(mh);

   845   unsigned char* p = bytecodes;

   846   Bytecodes::Code code;

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

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

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

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

   853     // length of bytecode (mnemonic + operands)

   854     address bcp = bs.bcp();

   855     int     len = bs.instruction_size();

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

   858     // copy the bytecodes

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

   860     if (len > 1) {

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

   862     }

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

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

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

   867     if (is_rewritten && len > 1) {

   868       bool is_wide = false;

   869       switch (code) {

   870       case Bytecodes::_getstatic       :  // fall through

   871       case Bytecodes::_putstatic       :  // fall through

   872       case Bytecodes::_getfield        :  // fall through

   873       case Bytecodes::_putfield        :  // fall through

   874       case Bytecodes::_invokevirtual   :  // fall through

   875       case Bytecodes::_invokespecial   :  // fall through

   876       case Bytecodes::_invokestatic    :  // fall through

   877       case Bytecodes::_invokedynamic   :  // fall through

   878       case Bytecodes::_invokeinterface : {

   879         assert(len == 3 ||

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

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

   882                "sanity check");

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

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

   886         ConstantPoolCacheEntry* entry;

   887         if (is_invokedynamic) {

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

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

   890         } else {

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

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

   893         }

   894         int i = entry->constant_pool_index();

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

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

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

   898         break;

   899       }

   900       case Bytecodes::_ldc_w:

   901         is_wide = true; // fall through

   902       case Bytecodes::_ldc: {

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

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

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

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

   907           if (is_wide) {

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

   909           } else {

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

   911           }

   912         }

   913         break;

   914         }

   915       }

   916     }

   918     p += len;

   919   }

   920 }

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

src/share/vm/prims/jvmtiClassFileReconstituter.cpp@eef07cd490d4

src/share/vm/prims/jvmtiClassFileReconstituter.cpp