jdk8-mips64-public/hotspot: src/share/vm/prims/jvmtiClassFileReconstituter.cpp@abe03600372a

8024468: PPC64 (part 201): cppInterpreter: implement bytecode profiling
Summary: Implement profiling for c2 jit compilation. Also enable new cppInterpreter features.
Reviewed-by: kvn

     1 /*

     2  * Copyright (c) 2005, 2012, 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();

    58   // Compute the real number of Java fields

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

    61   write_u2(java_fields);

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

    63     AccessFlags access_flags = fs.access_flags();

    64     int name_index = fs.name_index();

    65     int signature_index = fs.signature_index();

    66     int initial_value_index = fs.initval_index();

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

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

    69     int generic_signature_index = fs.generic_signature_index();

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

    72     // JVMSpec|   field_info {

    73     // JVMSpec|         u2 access_flags;

    74     // JVMSpec|         u2 name_index;

    75     // JVMSpec|         u2 descriptor_index;

    76     // JVMSpec|         u2 attributes_count;

    77     // JVMSpec|         attribute_info attributes[attributes_count];

    78     // JVMSpec|   }

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

    81     write_u2(name_index);

    82     write_u2(signature_index);

    83     int attr_count = 0;

    84     if (initial_value_index != 0) {

    85       ++attr_count;

    86     }

    87     if (access_flags.is_synthetic()) {

    88       // ++attr_count;

    89     }

    90     if (generic_signature_index != 0) {

    91       ++attr_count;

    92     }

    93     if (anno != NULL) {

    94       ++attr_count;     // has RuntimeVisibleAnnotations attribute

    95     }

    97     write_u2(attr_count);

    99     if (initial_value_index != 0) {

   100       write_attribute_name_index("ConstantValue");

   101       write_u4(2); //length always 2

   102       write_u2(initial_value_index);

   103     }

   104     if (access_flags.is_synthetic()) {

   105       // write_synthetic_attribute();

   106     }

   107     if (generic_signature_index != 0) {

   108       write_signature_attribute(generic_signature_index);

   109     }

   110     if (anno != NULL) {

   111       write_annotations_attribute("RuntimeVisibleAnnotations", anno);

   112     }

   113   }

   114 }

   116 // Write Code attribute

   117 // JVMSpec|   Code_attribute {

   118 // JVMSpec|     u2 attribute_name_index;

   119 // JVMSpec|     u4 attribute_length;

   120 // JVMSpec|     u2 max_stack;

   121 // JVMSpec|     u2 max_locals;

   122 // JVMSpec|     u4 code_length;

   123 // JVMSpec|     u1 code[code_length];

   124 // JVMSpec|     u2 exception_table_length;

   125 // JVMSpec|     {       u2 start_pc;

   126 // JVMSpec|             u2 end_pc;

   127 // JVMSpec|             u2  handler_pc;

   128 // JVMSpec|             u2  catch_type;

   129 // JVMSpec|     }       exception_table[exception_table_length];

   130 // JVMSpec|     u2 attributes_count;

   131 // JVMSpec|     attribute_info attributes[attributes_count];

   132 // JVMSpec|   }

   133 void JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) {

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

   135   u2 line_num_cnt = 0;

   136   int stackmap_len = 0;

   137   int local_variable_table_length = 0;

   138   int local_variable_type_table_length = 0;

   140   // compute number and length of attributes

   141   int attr_count = 0;

   142   int attr_size = 0;

   143   if (const_method->has_linenumber_table()) {

   144     line_num_cnt = line_number_table_entries(method);

   145     if (line_num_cnt != 0) {

   146       ++attr_count;

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

   148       //      LineNumberTable_attribute {

   149       //        u2 attribute_name_index;

   150       //        u4 attribute_length;

   151       //        u2 line_number_table_length;

   152       //        {  u2 start_pc;

   153       //           u2 line_number;

   154       //        } line_number_table[line_number_table_length];

   155       //      }

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

   157     }

   158   }

   159   if (method->has_stackmap_table()) {

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

   161     if (stackmap_len != 0) {

   162       ++attr_count;

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

   164       //      StackMapTable_attribute {

   165       //        u2 attribute_name_index;

   166       //        u4 attribute_length;

   167       //        u2 number_of_entries;

   168       //        stack_map_frame_entries[number_of_entries];

   169       //      }

   170       attr_size += 2 + 4 + stackmap_len;

   171     }

   172   }

   173   if (method->has_localvariable_table()) {

   174     local_variable_table_length = method->localvariable_table_length();

   175     if (local_variable_table_length != 0) {

   176       ++attr_count;

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

   178       // LocalVariableTable_attribute {

   179       //   u2 attribute_name_index;

   180       //   u4 attribute_length;

   181       //   u2 local_variable_table_length;

   182       //   {

   183       //     u2 start_pc;

   184       //     u2 length;

   185       //     u2 name_index;

   186       //     u2 descriptor_index;

   187       //     u2 index;

   188       //   }

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

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

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

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

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

   195           local_variable_type_table_length++;

   196         }

   197       }

   199       if (local_variable_type_table_length != 0) {

   200         ++attr_count;

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

   202         // LocalVariableTypeTable_attribute {

   203         //   u2 attribute_name_index;

   204         //   u4 attribute_length;

   205         //   u2 local_variable_type_table_length;

   206         //   {

   207         //     u2 start_pc;

   208         //     u2 length;

   209         //     u2 name_index;

   210         //     u2 signature_index;

   211         //     u2 index;

   212         //   }

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

   214       }

   215     }

   216   }

   218   ExceptionTable exception_table(method());

   219   int exception_table_length = exception_table.length();

   220   int code_size = const_method->code_size();

   221   int size =

   222     2+2+4 +                                // max_stack, max_locals, code_length

   223     code_size +                            // code

   224     2 +                                    // exception_table_length

   225     (2+2+2+2) * exception_table_length +   // exception_table

   226     2 +                                    // attributes_count

   227     attr_size;                             // attributes

   229   write_attribute_name_index("Code");

   230   write_u4(size);

   231   write_u2(method->verifier_max_stack());

   232   write_u2(method->max_locals());

   233   write_u4(code_size);

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

   235   write_u2(exception_table_length);

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

   237     write_u2(exception_table.start_pc(index));

   238     write_u2(exception_table.end_pc(index));

   239     write_u2(exception_table.handler_pc(index));

   240     write_u2(exception_table.catch_type_index(index));

   241   }

   242   write_u2(attr_count);

   243   if (line_num_cnt != 0) {

   244     write_line_number_table_attribute(method, line_num_cnt);

   245   }

   246   if (stackmap_len != 0) {

   247     write_stackmap_table_attribute(method, stackmap_len);

   248   }

   249   if (local_variable_table_length != 0) {

   250     write_local_variable_table_attribute(method, local_variable_table_length);

   251   }

   252   if (local_variable_type_table_length != 0) {

   253     write_local_variable_type_table_attribute(method, local_variable_type_table_length);

   254   }

   255 }

   257 // Write Exceptions attribute

   258 // JVMSpec|   Exceptions_attribute {

   259 // JVMSpec|     u2 attribute_name_index;

   260 // JVMSpec|     u4 attribute_length;

   261 // JVMSpec|     u2 number_of_exceptions;

   262 // JVMSpec|     u2 exception_index_table[number_of_exceptions];

   263 // JVMSpec|   }

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

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

   266   int checked_exceptions_length = const_method->checked_exceptions_length();

   267   int size =

   268     2 +                                    // number_of_exceptions

   269     2 * checked_exceptions_length;         // exception_index_table

   271   write_attribute_name_index("Exceptions");

   272   write_u4(size);

   273   write_u2(checked_exceptions_length);

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

   275     write_u2(checked_exceptions[index].class_cp_index);

   276   }

   277 }

   279 // Write SourceFile attribute

   280 // JVMSpec|   SourceFile_attribute {

   281 // JVMSpec|     u2 attribute_name_index;

   282 // JVMSpec|     u4 attribute_length;

   283 // JVMSpec|     u2 sourcefile_index;

   284 // JVMSpec|   }

   285 void JvmtiClassFileReconstituter::write_source_file_attribute() {

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

   288   write_attribute_name_index("SourceFile");

   289   write_u4(2);  // always length 2

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

   291 }

   293 // Write SourceDebugExtension attribute

   294 // JSR45|   SourceDebugExtension_attribute {

   295 // JSR45|       u2 attribute_name_index;

   296 // JSR45|       u4 attribute_length;

   297 // JSR45|       u1 debug_extension[attribute_length];

   298 // JSR45|   }

   299 void JvmtiClassFileReconstituter::write_source_debug_extension_attribute() {

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

   302   write_attribute_name_index("SourceDebugExtension");

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

   304   write_u4(len);

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

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

   307     write_u1(ext[i]);

   308   }

   309 }

   311 // Write (generic) Signature attribute

   312 // JVMSpec|   Signature_attribute {

   313 // JVMSpec|     u2 attribute_name_index;

   314 // JVMSpec|     u4 attribute_length;

   315 // JVMSpec|     u2 signature_index;

   316 // JVMSpec|   }

   317 void JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) {

   318   write_attribute_name_index("Signature");

   319   write_u4(2);  // always length 2

   320   write_u2(generic_signature_index);

   321 }

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

   324 u2 JvmtiClassFileReconstituter::inner_classes_attribute_length() {

   325   InnerClassesIterator iter(ikh());

   326   return iter.length();

   327 }

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

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

   331 // JSR202|   *Annotations_attribute {

   332 // JSR202|     u2 attribute_name_index;

   333 // JSR202|     u4 attribute_length;

   334 // JSR202|     ...

   335 // JSR202|   }

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

   337                                                               AnnotationArray* annos) {

   338   u4 length = annos->length();

   339   write_attribute_name_index(attr_name);

   340   write_u4(length);

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

   342 }

   344 //  BootstrapMethods_attribute {

   345 //    u2 attribute_name_index;

   346 //    u4 attribute_length;

   347 //    u2 num_bootstrap_methods;

   348 //    {   u2 bootstrap_method_ref;

   349 //        u2 num_bootstrap_arguments;

   350 //        u2 bootstrap_arguments[num_bootstrap_arguments];

   351 //    } bootstrap_methods[num_bootstrap_methods];

   352 //  }

   353 void JvmtiClassFileReconstituter::write_bootstrapmethod_attribute() {

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

   355   write_attribute_name_index("BootstrapMethods");

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

   358   // calculate length of attribute

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

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

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

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

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

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

   365   }

   366   write_u4(length);

   368   // write attribute

   369   write_u2(num_bootstrap_methods);

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

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

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

   373     write_u2(bootstrap_method_ref);

   374     write_u2(num_bootstrap_arguments);

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

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

   377       write_u2(bootstrap_argument);

   378     }

   379   }

   380 }

   383 // Write InnerClasses attribute

   384 // JVMSpec|   InnerClasses_attribute {

   385 // JVMSpec|     u2 attribute_name_index;

   386 // JVMSpec|     u4 attribute_length;

   387 // JVMSpec|     u2 number_of_classes;

   388 // JVMSpec|     {  u2 inner_class_info_index;

   389 // JVMSpec|        u2 outer_class_info_index;

   390 // JVMSpec|        u2 inner_name_index;

   391 // JVMSpec|        u2 inner_class_access_flags;

   392 // JVMSpec|     } classes[number_of_classes];

   393 // JVMSpec|   }

   394 void JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) {

   395   InnerClassesIterator iter(ikh());

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

   397             "caller must check");

   398   u2 entry_count = length / InstanceKlass::inner_class_next_offset;

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

   401   write_attribute_name_index("InnerClasses");

   402   write_u4(size);

   403   write_u2(entry_count);

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

   405     write_u2(iter.inner_class_info_index());

   406     write_u2(iter.outer_class_info_index());

   407     write_u2(iter.inner_name_index());

   408     write_u2(iter.inner_access_flags());

   409   }

   410 }

   412 // Write Synthetic attribute

   413 // JVMSpec|   Synthetic_attribute {

   414 // JVMSpec|     u2 attribute_name_index;

   415 // JVMSpec|     u4 attribute_length;

   416 // JVMSpec|   }

   417 void JvmtiClassFileReconstituter::write_synthetic_attribute() {

   418   write_attribute_name_index("Synthetic");

   419   write_u4(0); //length always zero

   420 }

   422 // Compute size of LineNumberTable

   423 u2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) {

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

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

   426   u2 num_entries = 0;

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

   428   while (stream.read_pair()) {

   429     num_entries++;

   430   }

   431   return num_entries;

   432 }

   434 // Write LineNumberTable attribute

   435 // JVMSpec|   LineNumberTable_attribute {

   436 // JVMSpec|     u2 attribute_name_index;

   437 // JVMSpec|     u4 attribute_length;

   438 // JVMSpec|     u2 line_number_table_length;

   439 // JVMSpec|     {  u2 start_pc;

   440 // JVMSpec|        u2 line_number;

   441 // JVMSpec|     } line_number_table[line_number_table_length];

   442 // JVMSpec|   }

   443 void JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method,

   444                                                                     u2 num_entries) {

   446   write_attribute_name_index("LineNumberTable");

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

   448   write_u2(num_entries);

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

   451   while (stream.read_pair()) {

   452     write_u2(stream.bci());

   453     write_u2(stream.line());

   454   }

   455 }

   457 // Write LocalVariableTable attribute

   458 // JVMSpec|   LocalVariableTable_attribute {

   459 // JVMSpec|     u2 attribute_name_index;

   460 // JVMSpec|     u4 attribute_length;

   461 // JVMSpec|     u2 local_variable_table_length;

   462 // JVMSpec|     {  u2 start_pc;

   463 // JVMSpec|       u2 length;

   464 // JVMSpec|       u2 name_index;

   465 // JVMSpec|       u2 descriptor_index;

   466 // JVMSpec|       u2 index;

   467 // JVMSpec|     } local_variable_table[local_variable_table_length];

   468 // JVMSpec|   }

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

   470     write_attribute_name_index("LocalVariableTable");

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

   472     write_u2(num_entries);

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

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

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

   478       write_u2(elem->start_bci);

   479       write_u2(elem->length);

   480       write_u2(elem->name_cp_index);

   481       write_u2(elem->descriptor_cp_index);

   482       write_u2(elem->slot);

   483       elem++;

   484     }

   485 }

   487 // Write LocalVariableTypeTable attribute

   488 // JVMSpec|   LocalVariableTypeTable_attribute {

   489 // JVMSpec|     u2 attribute_name_index;

   490 // JVMSpec|     u4 attribute_length;

   491 // JVMSpec|     u2 local_variable_type_table_length;

   492 // JVMSpec|     { u2 start_pc;

   493 // JVMSpec|       u2 length;

   494 // JVMSpec|       u2 name_index;

   495 // JVMSpec|       u2 signature_index;

   496 // JVMSpec|       u2 index;

   497 // JVMSpec|     } local_variable_type_table[local_variable_type_table_length];

   498 // JVMSpec|   }

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

   500     write_attribute_name_index("LocalVariableTypeTable");

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

   502     write_u2(num_entries);

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

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

   506       if (elem->signature_cp_index > 0) {

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

   508         write_u2(elem->start_bci);

   509         write_u2(elem->length);

   510         write_u2(elem->name_cp_index);

   511         write_u2(elem->signature_cp_index);

   512         write_u2(elem->slot);

   513         num_entries--;

   514       }

   515       elem++;

   516     }

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

   518 }

   520 // Write stack map table attribute

   521 // JSR-202|   StackMapTable_attribute {

   522 // JSR-202|     u2 attribute_name_index;

   523 // JSR-202|     u4 attribute_length;

   524 // JSR-202|     u2 number_of_entries;

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

   526 // JSR-202|   }

   527 void JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method,

   528                                                                  int stackmap_len) {

   530   write_attribute_name_index("StackMapTable");

   531   write_u4(stackmap_len);

   532   memcpy(

   533     writeable_address(stackmap_len),

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

   535     stackmap_len);

   536 }

   538 // Write one method_info structure

   539 // JVMSpec|   method_info {

   540 // JVMSpec|     u2 access_flags;

   541 // JVMSpec|     u2 name_index;

   542 // JVMSpec|     u2 descriptor_index;

   543 // JVMSpec|     u2 attributes_count;

   544 // JVMSpec|     attribute_info attributes[attributes_count];

   545 // JVMSpec|   }

   546 void JvmtiClassFileReconstituter::write_method_info(methodHandle method) {

   547   AccessFlags access_flags = method->access_flags();

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

   549   u2 generic_signature_index = const_method->generic_signature_index();

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

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

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

   554   // skip generated default interface methods

   555   if (method->is_overpass()) {

   556     return;

   557   }

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

   560   write_u2(const_method->name_index());

   561   write_u2(const_method->signature_index());

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

   564   // byte comparison

   565   int attr_count = 0;

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

   567     ++attr_count;     // has Code attribute

   568   }

   569   if (const_method->has_checked_exceptions()) {

   570     ++attr_count;     // has Exceptions attribute

   571   }

   572   if (default_anno != NULL) {

   573     ++attr_count;     // has AnnotationDefault attribute

   574   }

   575   // Deprecated attribute would go here

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

   577     // ++attr_count;

   578   }

   579   if (generic_signature_index != 0) {

   580     ++attr_count;

   581   }

   582   if (anno != NULL) {

   583     ++attr_count;     // has RuntimeVisibleAnnotations attribute

   584   }

   585   if (param_anno != NULL) {

   586     ++attr_count;     // has RuntimeVisibleParameterAnnotations attribute

   587   }

   589   write_u2(attr_count);

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

   591     write_code_attribute(method);

   592   }

   593   if (const_method->has_checked_exceptions()) {

   594     write_exceptions_attribute(const_method);

   595   }

   596   if (default_anno != NULL) {

   597     write_annotations_attribute("AnnotationDefault", default_anno);

   598   }

   599   // Deprecated attribute would go here

   600   if (access_flags.is_synthetic()) {

   601     // write_synthetic_attribute();

   602   }

   603   if (generic_signature_index != 0) {

   604     write_signature_attribute(generic_signature_index);

   605   }

   606   if (anno != NULL) {

   607     write_annotations_attribute("RuntimeVisibleAnnotations", anno);

   608   }

   609   if (param_anno != NULL) {

   610     write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno);

   611   }

   612 }

   614 // Write the class attributes portion of ClassFile structure

   615 // JVMSpec|     u2 attributes_count;

   616 // JVMSpec|     attribute_info attributes[attributes_count];

   617 void JvmtiClassFileReconstituter::write_class_attributes() {

   618   u2 inner_classes_length = inner_classes_attribute_length();

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

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

   622   int attr_count = 0;

   623   if (generic_signature != NULL) {

   624     ++attr_count;

   625   }

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

   627     ++attr_count;

   628   }

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

   630     ++attr_count;

   631   }

   632   if (inner_classes_length > 0) {

   633     ++attr_count;

   634   }

   635   if (anno != NULL) {

   636     ++attr_count;     // has RuntimeVisibleAnnotations attribute

   637   }

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

   639     ++attr_count;

   640   }

   642   write_u2(attr_count);

   644   if (generic_signature != NULL) {

   645     write_signature_attribute(symbol_to_cpool_index(generic_signature));

   646   }

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

   648     write_source_file_attribute();

   649   }

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

   651     write_source_debug_extension_attribute();

   652   }

   653   if (inner_classes_length > 0) {

   654     write_inner_classes_attribute(inner_classes_length);

   655   }

   656   if (anno != NULL) {

   657     write_annotations_attribute("RuntimeVisibleAnnotations", anno);

   658   }

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

   660     write_bootstrapmethod_attribute();

   661   }

   662 }

   664 // Write the method information portion of ClassFile structure

   665 // JVMSpec|     u2 methods_count;

   666 // JVMSpec|     method_info methods[methods_count];

   667 void JvmtiClassFileReconstituter::write_method_infos() {

   668   HandleMark hm(thread());

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

   670   int num_methods = methods->length();

   671   int num_overpass = 0;

   673   // count the generated default interface methods

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

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

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

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

   678     if (method->is_overpass()) {

   679       num_overpass++;

   680     }

   681   }

   683   write_u2(num_methods - num_overpass);

   684   if (JvmtiExport::can_maintain_original_method_order()) {

   685     int index;

   686     int original_index;

   687     intArray method_order(num_methods, 0);

   689     // invert the method order mapping

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

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

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

   693              "invalid original method index");

   694       method_order.at_put(original_index, index);

   695     }

   697     // write in original order

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

   699       index = method_order.at(original_index);

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

   701       write_method_info(method);

   702     }

   703   } else {

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

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

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

   707       write_method_info(method);

   708     }

   709   }

   710 }

   712 void JvmtiClassFileReconstituter::write_class_file_format() {

   713   ReallocMark();

   715   // JVMSpec|   ClassFile {

   716   // JVMSpec|           u4 magic;

   717   write_u4(0xCAFEBABE);

   719   // JVMSpec|           u2 minor_version;

   720   // JVMSpec|           u2 major_version;

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

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

   723   write_u2(major);

   725   // JVMSpec|           u2 constant_pool_count;

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

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

   728   copy_cpool_bytes(writeable_address(cpool_size()));

   730   // JVMSpec|           u2 access_flags;

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

   733   // JVMSpec|           u2 this_class;

   734   // JVMSpec|           u2 super_class;

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

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

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

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

   740   // JVMSpec|           u2 interfaces_count;

   741   // JVMSpec|           u2 interfaces[interfaces_count];

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

   743   int num_interfaces = interfaces->length();

   744   write_u2(num_interfaces);

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

   746     HandleMark hm(thread());

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

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

   749   }

   751   // JVMSpec|           u2 fields_count;

   752   // JVMSpec|           field_info fields[fields_count];

   753   write_field_infos();

   755   // JVMSpec|           u2 methods_count;

   756   // JVMSpec|           method_info methods[methods_count];

   757   write_method_infos();

   759   // JVMSpec|           u2 attributes_count;

   760   // JVMSpec|           attribute_info attributes[attributes_count];

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

   762   write_class_attributes();

   763 }

   765 address JvmtiClassFileReconstituter::writeable_address(size_t size) {

   766   size_t used_size = _buffer_ptr - _buffer;

   767   if (size + used_size >= _buffer_size) {

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

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

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

   771                                                          * initial_buffer_size;

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

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

   775     _buffer_size = new_buffer_size;

   776     _buffer_ptr = _buffer + used_size;

   777   }

   778   u1* ret_ptr = _buffer_ptr;

   779   _buffer_ptr += size;

   780   return ret_ptr;

   781 }

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

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

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

   786   u2 attr_name_index = symbol_to_cpool_index(sym);

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

   788   write_u2(attr_name_index);

   789 }

   791 void JvmtiClassFileReconstituter::write_u1(u1 x) {

   792   *writeable_address(1) = x;

   793 }

   795 void JvmtiClassFileReconstituter::write_u2(u2 x) {

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

   797 }

   799 void JvmtiClassFileReconstituter::write_u4(u4 x) {

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

   801 }

   803 void JvmtiClassFileReconstituter::write_u8(u8 x) {

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

   805 }

   807 void JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh,

   808                                                  unsigned char* bytecodes) {

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

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

   812   BytecodeStream bs(mh);

   814   unsigned char* p = bytecodes;

   815   Bytecodes::Code code;

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

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

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

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

   822     // length of bytecode (mnemonic + operands)

   823     address bcp = bs.bcp();

   824     int     len = bs.instruction_size();

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

   827     // copy the bytecodes

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

   829     if (len > 1) {

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

   831     }

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

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

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

   836     if (is_rewritten && len > 1) {

   837       bool is_wide = false;

   838       switch (code) {

   839       case Bytecodes::_getstatic       :  // fall through

   840       case Bytecodes::_putstatic       :  // fall through

   841       case Bytecodes::_getfield        :  // fall through

   842       case Bytecodes::_putfield        :  // fall through

   843       case Bytecodes::_invokevirtual   :  // fall through

   844       case Bytecodes::_invokespecial   :  // fall through

   845       case Bytecodes::_invokestatic    :  // fall through

   846       case Bytecodes::_invokedynamic   :  // fall through

   847       case Bytecodes::_invokeinterface : {

   848         assert(len == 3 ||

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

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

   851                "sanity check");

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

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

   855         ConstantPoolCacheEntry* entry;

   856         if (is_invokedynamic) {

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

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

   859         } else {

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

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

   862         }

   863         int i = entry->constant_pool_index();

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

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

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

   867         break;

   868       }

   869       case Bytecodes::_ldc_w:

   870         is_wide = true; // fall through

   871       case Bytecodes::_ldc: {

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

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

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

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

   876           if (is_wide) {

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

   878           } else {

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

   880           }

   881         }

   882         break;

   883         }

   884       }

   885     }

   887     p += len;

   888   }

   889 }

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

src/share/vm/prims/jvmtiClassFileReconstituter.cpp@abe03600372a

src/share/vm/prims/jvmtiClassFileReconstituter.cpp