aoqi@0: /*
aoqi@0:  * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@1: /*
aoqi@1:  * This file has been modified by Loongson Technology in 2015. These
aoqi@1:  * modifications are Copyright (c) 2015 Loongson Technology, and are made
aoqi@1:  * available on the same license terms set forth above.
aoqi@1:  */
aoqi@1: 
aoqi@0: #include "precompiled.hpp"
aoqi@0: #include "classfile/symbolTable.hpp"
aoqi@0: #include "interpreter/bytecodeStream.hpp"
aoqi@0: #include "oops/fieldStreams.hpp"
aoqi@0: #include "prims/jvmtiClassFileReconstituter.hpp"
aoqi@0: #include "runtime/signature.hpp"
aoqi@0: #ifdef TARGET_ARCH_x86
aoqi@0: # include "bytes_x86.hpp"
aoqi@0: #endif
aoqi@0: #ifdef TARGET_ARCH_sparc
aoqi@0: # include "bytes_sparc.hpp"
aoqi@0: #endif
aoqi@0: #ifdef TARGET_ARCH_zero
aoqi@0: # include "bytes_zero.hpp"
aoqi@0: #endif
aoqi@0: #ifdef TARGET_ARCH_arm
aoqi@0: # include "bytes_arm.hpp"
aoqi@0: #endif
aoqi@0: #ifdef TARGET_ARCH_ppc
aoqi@0: # include "bytes_ppc.hpp"
aoqi@0: #endif
aoqi@1: #ifdef TARGET_ARCH_mips
aoqi@1: # include "bytes_mips.hpp"
aoqi@1: #endif
aoqi@0: // FIXME: add Deprecated attribute
aoqi@0: // FIXME: fix Synthetic attribute
aoqi@0: // FIXME: per Serguei, add error return handling for ConstantPool::copy_cpool_bytes()
aoqi@0: 
aoqi@0: 
aoqi@0: // Write the field information portion of ClassFile structure
aoqi@0: // JVMSpec|     u2 fields_count;
aoqi@0: // JVMSpec|     field_info fields[fields_count];
aoqi@0: void JvmtiClassFileReconstituter::write_field_infos() {
aoqi@0:   HandleMark hm(thread());
aoqi@0:   Array<AnnotationArray*>* fields_anno = ikh()->fields_annotations();
aoqi@0: 
aoqi@0:   // Compute the real number of Java fields
aoqi@0:   int java_fields = ikh()->java_fields_count();
aoqi@0: 
aoqi@0:   write_u2(java_fields);
aoqi@0:   for (JavaFieldStream fs(ikh()); !fs.done(); fs.next()) {
aoqi@0:     AccessFlags access_flags = fs.access_flags();
aoqi@0:     int name_index = fs.name_index();
aoqi@0:     int signature_index = fs.signature_index();
aoqi@0:     int initial_value_index = fs.initval_index();
aoqi@0:     guarantee(name_index != 0 && signature_index != 0, "bad constant pool index for field");
aoqi@0:     // int offset = ikh()->field_offset( index );
aoqi@0:     int generic_signature_index = fs.generic_signature_index();
aoqi@0:     AnnotationArray* anno = fields_anno == NULL ? NULL : fields_anno->at(fs.index());
aoqi@0: 
aoqi@0:     // JVMSpec|   field_info {
aoqi@0:     // JVMSpec|         u2 access_flags;
aoqi@0:     // JVMSpec|         u2 name_index;
aoqi@0:     // JVMSpec|         u2 descriptor_index;
aoqi@0:     // JVMSpec|         u2 attributes_count;
aoqi@0:     // JVMSpec|         attribute_info attributes[attributes_count];
aoqi@0:     // JVMSpec|   }
aoqi@0: 
aoqi@0:     write_u2(access_flags.as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
aoqi@0:     write_u2(name_index);
aoqi@0:     write_u2(signature_index);
aoqi@0:     int attr_count = 0;
aoqi@0:     if (initial_value_index != 0) {
aoqi@0:       ++attr_count;
aoqi@0:     }
aoqi@0:     if (access_flags.is_synthetic()) {
aoqi@0:       // ++attr_count;
aoqi@0:     }
aoqi@0:     if (generic_signature_index != 0) {
aoqi@0:       ++attr_count;
aoqi@0:     }
aoqi@0:     if (anno != NULL) {
aoqi@0:       ++attr_count;     // has RuntimeVisibleAnnotations attribute
aoqi@0:     }
aoqi@0: 
aoqi@0:     write_u2(attr_count);
aoqi@0: 
aoqi@0:     if (initial_value_index != 0) {
aoqi@0:       write_attribute_name_index("ConstantValue");
aoqi@0:       write_u4(2); //length always 2
aoqi@0:       write_u2(initial_value_index);
aoqi@0:     }
aoqi@0:     if (access_flags.is_synthetic()) {
aoqi@0:       // write_synthetic_attribute();
aoqi@0:     }
aoqi@0:     if (generic_signature_index != 0) {
aoqi@0:       write_signature_attribute(generic_signature_index);
aoqi@0:     }
aoqi@0:     if (anno != NULL) {
aoqi@0:       write_annotations_attribute("RuntimeVisibleAnnotations", anno);
aoqi@0:     }
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // Write Code attribute
aoqi@0: // JVMSpec|   Code_attribute {
aoqi@0: // JVMSpec|     u2 attribute_name_index;
aoqi@0: // JVMSpec|     u4 attribute_length;
aoqi@0: // JVMSpec|     u2 max_stack;
aoqi@0: // JVMSpec|     u2 max_locals;
aoqi@0: // JVMSpec|     u4 code_length;
aoqi@0: // JVMSpec|     u1 code[code_length];
aoqi@0: // JVMSpec|     u2 exception_table_length;
aoqi@0: // JVMSpec|     {       u2 start_pc;
aoqi@0: // JVMSpec|             u2 end_pc;
aoqi@0: // JVMSpec|             u2  handler_pc;
aoqi@0: // JVMSpec|             u2  catch_type;
aoqi@0: // JVMSpec|     }       exception_table[exception_table_length];
aoqi@0: // JVMSpec|     u2 attributes_count;
aoqi@0: // JVMSpec|     attribute_info attributes[attributes_count];
aoqi@0: // JVMSpec|   }
aoqi@0: void JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) {
aoqi@0:   ConstMethod* const_method = method->constMethod();
aoqi@0:   u2 line_num_cnt = 0;
aoqi@0:   int stackmap_len = 0;
aoqi@0:   int local_variable_table_length = 0;
aoqi@0:   int local_variable_type_table_length = 0;
aoqi@0: 
aoqi@0:   // compute number and length of attributes
aoqi@0:   int attr_count = 0;
aoqi@0:   int attr_size = 0;
aoqi@0:   if (const_method->has_linenumber_table()) {
aoqi@0:     line_num_cnt = line_number_table_entries(method);
aoqi@0:     if (line_num_cnt != 0) {
aoqi@0:       ++attr_count;
aoqi@0:       // Compute the complete size of the line number table attribute:
aoqi@0:       //      LineNumberTable_attribute {
aoqi@0:       //        u2 attribute_name_index;
aoqi@0:       //        u4 attribute_length;
aoqi@0:       //        u2 line_number_table_length;
aoqi@0:       //        {  u2 start_pc;
aoqi@0:       //           u2 line_number;
aoqi@0:       //        } line_number_table[line_number_table_length];
aoqi@0:       //      }
aoqi@0:       attr_size += 2 + 4 + 2 + line_num_cnt * (2 + 2);
aoqi@0:     }
aoqi@0:   }
aoqi@0:   if (method->has_stackmap_table()) {
aoqi@0:     stackmap_len = method->stackmap_data()->length();
aoqi@0:     if (stackmap_len != 0) {
aoqi@0:       ++attr_count;
aoqi@0:       // Compute the  size of the stack map table attribute (VM stores raw):
aoqi@0:       //      StackMapTable_attribute {
aoqi@0:       //        u2 attribute_name_index;
aoqi@0:       //        u4 attribute_length;
aoqi@0:       //        u2 number_of_entries;
aoqi@0:       //        stack_map_frame_entries[number_of_entries];
aoqi@0:       //      }
aoqi@0:       attr_size += 2 + 4 + stackmap_len;
aoqi@0:     }
aoqi@0:   }
aoqi@0:   if (method->has_localvariable_table()) {
aoqi@0:     local_variable_table_length = method->localvariable_table_length();
aoqi@0:     if (local_variable_table_length != 0) {
aoqi@0:       ++attr_count;
aoqi@0:       // Compute the size of the local variable table attribute (VM stores raw):
aoqi@0:       // LocalVariableTable_attribute {
aoqi@0:       //   u2 attribute_name_index;
aoqi@0:       //   u4 attribute_length;
aoqi@0:       //   u2 local_variable_table_length;
aoqi@0:       //   {
aoqi@0:       //     u2 start_pc;
aoqi@0:       //     u2 length;
aoqi@0:       //     u2 name_index;
aoqi@0:       //     u2 descriptor_index;
aoqi@0:       //     u2 index;
aoqi@0:       //   }
aoqi@0:       attr_size += 2 + 4 + 2 + local_variable_table_length * (2 + 2 + 2 + 2 + 2);
aoqi@0: 
aoqi@0:       // Local variables with generic signatures must have LVTT entries
aoqi@0:       LocalVariableTableElement *elem = method->localvariable_table_start();
aoqi@0:       for (int idx = 0; idx < local_variable_table_length; idx++) {
aoqi@0:         if (elem[idx].signature_cp_index != 0) {
aoqi@0:           local_variable_type_table_length++;
aoqi@0:         }
aoqi@0:       }
aoqi@0: 
aoqi@0:       if (local_variable_type_table_length != 0) {
aoqi@0:         ++attr_count;
aoqi@0:         // Compute the size of the local variable type table attribute (VM stores raw):
aoqi@0:         // LocalVariableTypeTable_attribute {
aoqi@0:         //   u2 attribute_name_index;
aoqi@0:         //   u4 attribute_length;
aoqi@0:         //   u2 local_variable_type_table_length;
aoqi@0:         //   {
aoqi@0:         //     u2 start_pc;
aoqi@0:         //     u2 length;
aoqi@0:         //     u2 name_index;
aoqi@0:         //     u2 signature_index;
aoqi@0:         //     u2 index;
aoqi@0:         //   }
aoqi@0:         attr_size += 2 + 4 + 2 + local_variable_type_table_length * (2 + 2 + 2 + 2 + 2);
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   ExceptionTable exception_table(method());
aoqi@0:   int exception_table_length = exception_table.length();
aoqi@0:   int code_size = const_method->code_size();
aoqi@0:   int size =
aoqi@0:     2+2+4 +                                // max_stack, max_locals, code_length
aoqi@0:     code_size +                            // code
aoqi@0:     2 +                                    // exception_table_length
aoqi@0:     (2+2+2+2) * exception_table_length +   // exception_table
aoqi@0:     2 +                                    // attributes_count
aoqi@0:     attr_size;                             // attributes
aoqi@0: 
aoqi@0:   write_attribute_name_index("Code");
aoqi@0:   write_u4(size);
aoqi@0:   write_u2(method->verifier_max_stack());
aoqi@0:   write_u2(method->max_locals());
aoqi@0:   write_u4(code_size);
aoqi@0:   copy_bytecodes(method, (unsigned char*)writeable_address(code_size));
aoqi@0:   write_u2(exception_table_length);
aoqi@0:   for (int index = 0; index < exception_table_length; index++) {
aoqi@0:     write_u2(exception_table.start_pc(index));
aoqi@0:     write_u2(exception_table.end_pc(index));
aoqi@0:     write_u2(exception_table.handler_pc(index));
aoqi@0:     write_u2(exception_table.catch_type_index(index));
aoqi@0:   }
aoqi@0:   write_u2(attr_count);
aoqi@0:   if (line_num_cnt != 0) {
aoqi@0:     write_line_number_table_attribute(method, line_num_cnt);
aoqi@0:   }
aoqi@0:   if (stackmap_len != 0) {
aoqi@0:     write_stackmap_table_attribute(method, stackmap_len);
aoqi@0:   }
aoqi@0:   if (local_variable_table_length != 0) {
aoqi@0:     write_local_variable_table_attribute(method, local_variable_table_length);
aoqi@0:   }
aoqi@0:   if (local_variable_type_table_length != 0) {
aoqi@0:     write_local_variable_type_table_attribute(method, local_variable_type_table_length);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // Write Exceptions attribute
aoqi@0: // JVMSpec|   Exceptions_attribute {
aoqi@0: // JVMSpec|     u2 attribute_name_index;
aoqi@0: // JVMSpec|     u4 attribute_length;
aoqi@0: // JVMSpec|     u2 number_of_exceptions;
aoqi@0: // JVMSpec|     u2 exception_index_table[number_of_exceptions];
aoqi@0: // JVMSpec|   }
aoqi@0: void JvmtiClassFileReconstituter::write_exceptions_attribute(ConstMethod* const_method) {
aoqi@0:   CheckedExceptionElement* checked_exceptions = const_method->checked_exceptions_start();
aoqi@0:   int checked_exceptions_length = const_method->checked_exceptions_length();
aoqi@0:   int size =
aoqi@0:     2 +                                    // number_of_exceptions
aoqi@0:     2 * checked_exceptions_length;         // exception_index_table
aoqi@0: 
aoqi@0:   write_attribute_name_index("Exceptions");
aoqi@0:   write_u4(size);
aoqi@0:   write_u2(checked_exceptions_length);
aoqi@0:   for (int index = 0; index < checked_exceptions_length; index++) {
aoqi@0:     write_u2(checked_exceptions[index].class_cp_index);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // Write SourceFile attribute
aoqi@0: // JVMSpec|   SourceFile_attribute {
aoqi@0: // JVMSpec|     u2 attribute_name_index;
aoqi@0: // JVMSpec|     u4 attribute_length;
aoqi@0: // JVMSpec|     u2 sourcefile_index;
aoqi@0: // JVMSpec|   }
aoqi@0: void JvmtiClassFileReconstituter::write_source_file_attribute() {
aoqi@0:   assert(ikh()->source_file_name() != NULL, "caller must check");
aoqi@0: 
aoqi@0:   write_attribute_name_index("SourceFile");
aoqi@0:   write_u4(2);  // always length 2
aoqi@0:   write_u2(symbol_to_cpool_index(ikh()->source_file_name()));
aoqi@0: }
aoqi@0: 
aoqi@0: // Write SourceDebugExtension attribute
aoqi@0: // JSR45|   SourceDebugExtension_attribute {
aoqi@0: // JSR45|       u2 attribute_name_index;
aoqi@0: // JSR45|       u4 attribute_length;
aoqi@0: // JSR45|       u1 debug_extension[attribute_length];
aoqi@0: // JSR45|   }
aoqi@0: void JvmtiClassFileReconstituter::write_source_debug_extension_attribute() {
aoqi@0:   assert(ikh()->source_debug_extension() != NULL, "caller must check");
aoqi@0: 
aoqi@0:   write_attribute_name_index("SourceDebugExtension");
aoqi@0:   int len = (int)strlen(ikh()->source_debug_extension());
aoqi@0:   write_u4(len);
aoqi@0:   u1* ext = (u1*)ikh()->source_debug_extension();
aoqi@0:   for (int i=0; i<len; i++) {
aoqi@0:     write_u1(ext[i]);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // Write (generic) Signature attribute
aoqi@0: // JVMSpec|   Signature_attribute {
aoqi@0: // JVMSpec|     u2 attribute_name_index;
aoqi@0: // JVMSpec|     u4 attribute_length;
aoqi@0: // JVMSpec|     u2 signature_index;
aoqi@0: // JVMSpec|   }
aoqi@0: void JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) {
aoqi@0:   write_attribute_name_index("Signature");
aoqi@0:   write_u4(2);  // always length 2
aoqi@0:   write_u2(generic_signature_index);
aoqi@0: }
aoqi@0: 
aoqi@0: // Compute the number of entries in the InnerClasses attribute
aoqi@0: u2 JvmtiClassFileReconstituter::inner_classes_attribute_length() {
aoqi@0:   InnerClassesIterator iter(ikh());
aoqi@0:   return iter.length();
aoqi@0: }
aoqi@0: 
aoqi@0: // Write an annotation attribute.  The VM stores them in raw form, so all we need
aoqi@0: // to do is add the attrubute name and fill in the length.
aoqi@0: // JSR202|   *Annotations_attribute {
aoqi@0: // JSR202|     u2 attribute_name_index;
aoqi@0: // JSR202|     u4 attribute_length;
aoqi@0: // JSR202|     ...
aoqi@0: // JSR202|   }
aoqi@0: void JvmtiClassFileReconstituter::write_annotations_attribute(const char* attr_name,
aoqi@0:                                                               AnnotationArray* annos) {
aoqi@0:   u4 length = annos->length();
aoqi@0:   write_attribute_name_index(attr_name);
aoqi@0:   write_u4(length);
aoqi@0:   memcpy(writeable_address(length), annos->adr_at(0), length);
aoqi@0: }
aoqi@0: 
aoqi@0: //  BootstrapMethods_attribute {
aoqi@0: //    u2 attribute_name_index;
aoqi@0: //    u4 attribute_length;
aoqi@0: //    u2 num_bootstrap_methods;
aoqi@0: //    {   u2 bootstrap_method_ref;
aoqi@0: //        u2 num_bootstrap_arguments;
aoqi@0: //        u2 bootstrap_arguments[num_bootstrap_arguments];
aoqi@0: //    } bootstrap_methods[num_bootstrap_methods];
aoqi@0: //  }
aoqi@0: void JvmtiClassFileReconstituter::write_bootstrapmethod_attribute() {
aoqi@0:   Array<u2>* operands = cpool()->operands();
aoqi@0:   write_attribute_name_index("BootstrapMethods");
aoqi@0:   int num_bootstrap_methods = ConstantPool::operand_array_length(operands);
aoqi@0: 
aoqi@0:   // calculate length of attribute
aoqi@0:   int length = sizeof(u2); // num_bootstrap_methods
aoqi@0:   for (int n = 0; n < num_bootstrap_methods; n++) {
aoqi@0:     u2 num_bootstrap_arguments = cpool()->operand_argument_count_at(n);
aoqi@0:     length += sizeof(u2); // bootstrap_method_ref
aoqi@0:     length += sizeof(u2); // num_bootstrap_arguments
aoqi@0:     length += sizeof(u2) * num_bootstrap_arguments; // bootstrap_arguments[num_bootstrap_arguments]
aoqi@0:   }
aoqi@0:   write_u4(length);
aoqi@0: 
aoqi@0:   // write attribute
aoqi@0:   write_u2(num_bootstrap_methods);
aoqi@0:   for (int n = 0; n < num_bootstrap_methods; n++) {
aoqi@0:     u2 bootstrap_method_ref = cpool()->operand_bootstrap_method_ref_index_at(n);
aoqi@0:     u2 num_bootstrap_arguments = cpool()->operand_argument_count_at(n);
aoqi@0:     write_u2(bootstrap_method_ref);
aoqi@0:     write_u2(num_bootstrap_arguments);
aoqi@0:     for (int arg = 0; arg < num_bootstrap_arguments; arg++) {
aoqi@0:       u2 bootstrap_argument = cpool()->operand_argument_index_at(n, arg);
aoqi@0:       write_u2(bootstrap_argument);
aoqi@0:     }
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // Write InnerClasses attribute
aoqi@0: // JVMSpec|   InnerClasses_attribute {
aoqi@0: // JVMSpec|     u2 attribute_name_index;
aoqi@0: // JVMSpec|     u4 attribute_length;
aoqi@0: // JVMSpec|     u2 number_of_classes;
aoqi@0: // JVMSpec|     {  u2 inner_class_info_index;
aoqi@0: // JVMSpec|        u2 outer_class_info_index;
aoqi@0: // JVMSpec|        u2 inner_name_index;
aoqi@0: // JVMSpec|        u2 inner_class_access_flags;
aoqi@0: // JVMSpec|     } classes[number_of_classes];
aoqi@0: // JVMSpec|   }
aoqi@0: void JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) {
aoqi@0:   InnerClassesIterator iter(ikh());
aoqi@0:   guarantee(iter.length() != 0 && iter.length() == length,
aoqi@0:             "caller must check");
aoqi@0:   u2 entry_count = length / InstanceKlass::inner_class_next_offset;
aoqi@0:   u4 size = 2 + entry_count * (2+2+2+2);
aoqi@0: 
aoqi@0:   write_attribute_name_index("InnerClasses");
aoqi@0:   write_u4(size);
aoqi@0:   write_u2(entry_count);
aoqi@0:   for (; !iter.done(); iter.next()) {
aoqi@0:     write_u2(iter.inner_class_info_index());
aoqi@0:     write_u2(iter.outer_class_info_index());
aoqi@0:     write_u2(iter.inner_name_index());
aoqi@0:     write_u2(iter.inner_access_flags());
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // Write Synthetic attribute
aoqi@0: // JVMSpec|   Synthetic_attribute {
aoqi@0: // JVMSpec|     u2 attribute_name_index;
aoqi@0: // JVMSpec|     u4 attribute_length;
aoqi@0: // JVMSpec|   }
aoqi@0: void JvmtiClassFileReconstituter::write_synthetic_attribute() {
aoqi@0:   write_attribute_name_index("Synthetic");
aoqi@0:   write_u4(0); //length always zero
aoqi@0: }
aoqi@0: 
aoqi@0: // Compute size of LineNumberTable
aoqi@0: u2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) {
aoqi@0:   // The line number table is compressed so we don't know how big it is until decompressed.
aoqi@0:   // Decompression is really fast so we just do it twice.
aoqi@0:   u2 num_entries = 0;
aoqi@0:   CompressedLineNumberReadStream stream(method->compressed_linenumber_table());
aoqi@0:   while (stream.read_pair()) {
aoqi@0:     num_entries++;
aoqi@0:   }
aoqi@0:   return num_entries;
aoqi@0: }
aoqi@0: 
aoqi@0: // Write LineNumberTable attribute
aoqi@0: // JVMSpec|   LineNumberTable_attribute {
aoqi@0: // JVMSpec|     u2 attribute_name_index;
aoqi@0: // JVMSpec|     u4 attribute_length;
aoqi@0: // JVMSpec|     u2 line_number_table_length;
aoqi@0: // JVMSpec|     {  u2 start_pc;
aoqi@0: // JVMSpec|        u2 line_number;
aoqi@0: // JVMSpec|     } line_number_table[line_number_table_length];
aoqi@0: // JVMSpec|   }
aoqi@0: void JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method,
aoqi@0:                                                                     u2 num_entries) {
aoqi@0: 
aoqi@0:   write_attribute_name_index("LineNumberTable");
aoqi@0:   write_u4(2 + num_entries * (2 + 2));
aoqi@0:   write_u2(num_entries);
aoqi@0: 
aoqi@0:   CompressedLineNumberReadStream stream(method->compressed_linenumber_table());
aoqi@0:   while (stream.read_pair()) {
aoqi@0:     write_u2(stream.bci());
aoqi@0:     write_u2(stream.line());
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // Write LocalVariableTable attribute
aoqi@0: // JVMSpec|   LocalVariableTable_attribute {
aoqi@0: // JVMSpec|     u2 attribute_name_index;
aoqi@0: // JVMSpec|     u4 attribute_length;
aoqi@0: // JVMSpec|     u2 local_variable_table_length;
aoqi@0: // JVMSpec|     {  u2 start_pc;
aoqi@0: // JVMSpec|       u2 length;
aoqi@0: // JVMSpec|       u2 name_index;
aoqi@0: // JVMSpec|       u2 descriptor_index;
aoqi@0: // JVMSpec|       u2 index;
aoqi@0: // JVMSpec|     } local_variable_table[local_variable_table_length];
aoqi@0: // JVMSpec|   }
aoqi@0: void JvmtiClassFileReconstituter::write_local_variable_table_attribute(methodHandle method, u2 num_entries) {
aoqi@0:     write_attribute_name_index("LocalVariableTable");
aoqi@0:     write_u4(2 + num_entries * (2 + 2 + 2 + 2 + 2));
aoqi@0:     write_u2(num_entries);
aoqi@0: 
aoqi@0:     assert(method->localvariable_table_length() == num_entries, "just checking");
aoqi@0: 
aoqi@0:     LocalVariableTableElement *elem = method->localvariable_table_start();
aoqi@0:     for (int j=0; j<method->localvariable_table_length(); j++) {
aoqi@0:       write_u2(elem->start_bci);
aoqi@0:       write_u2(elem->length);
aoqi@0:       write_u2(elem->name_cp_index);
aoqi@0:       write_u2(elem->descriptor_cp_index);
aoqi@0:       write_u2(elem->slot);
aoqi@0:       elem++;
aoqi@0:     }
aoqi@0: }
aoqi@0: 
aoqi@0: // Write LocalVariableTypeTable attribute
aoqi@0: // JVMSpec|   LocalVariableTypeTable_attribute {
aoqi@0: // JVMSpec|     u2 attribute_name_index;
aoqi@0: // JVMSpec|     u4 attribute_length;
aoqi@0: // JVMSpec|     u2 local_variable_type_table_length;
aoqi@0: // JVMSpec|     { u2 start_pc;
aoqi@0: // JVMSpec|       u2 length;
aoqi@0: // JVMSpec|       u2 name_index;
aoqi@0: // JVMSpec|       u2 signature_index;
aoqi@0: // JVMSpec|       u2 index;
aoqi@0: // JVMSpec|     } local_variable_type_table[local_variable_type_table_length];
aoqi@0: // JVMSpec|   }
aoqi@0: void JvmtiClassFileReconstituter::write_local_variable_type_table_attribute(methodHandle method, u2 num_entries) {
aoqi@0:     write_attribute_name_index("LocalVariableTypeTable");
aoqi@0:     write_u4(2 + num_entries * (2 + 2 + 2 + 2 + 2));
aoqi@0:     write_u2(num_entries);
aoqi@0: 
aoqi@0:     LocalVariableTableElement *elem = method->localvariable_table_start();
aoqi@0:     for (int j=0; j<method->localvariable_table_length(); j++) {
aoqi@0:       if (elem->signature_cp_index > 0) {
aoqi@0:         // Local variable has a generic signature - write LVTT attribute entry
aoqi@0:         write_u2(elem->start_bci);
aoqi@0:         write_u2(elem->length);
aoqi@0:         write_u2(elem->name_cp_index);
aoqi@0:         write_u2(elem->signature_cp_index);
aoqi@0:         write_u2(elem->slot);
aoqi@0:         num_entries--;
aoqi@0:       }
aoqi@0:       elem++;
aoqi@0:     }
aoqi@0:     assert(num_entries == 0, "just checking");
aoqi@0: }
aoqi@0: 
aoqi@0: // Write stack map table attribute
aoqi@0: // JSR-202|   StackMapTable_attribute {
aoqi@0: // JSR-202|     u2 attribute_name_index;
aoqi@0: // JSR-202|     u4 attribute_length;
aoqi@0: // JSR-202|     u2 number_of_entries;
aoqi@0: // JSR-202|     stack_map_frame_entries[number_of_entries];
aoqi@0: // JSR-202|   }
aoqi@0: void JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method,
aoqi@0:                                                                  int stackmap_len) {
aoqi@0: 
aoqi@0:   write_attribute_name_index("StackMapTable");
aoqi@0:   write_u4(stackmap_len);
aoqi@0:   memcpy(
aoqi@0:     writeable_address(stackmap_len),
aoqi@0:     (void*)(method->stackmap_data()->adr_at(0)),
aoqi@0:     stackmap_len);
aoqi@0: }
aoqi@0: 
aoqi@0: // Write one method_info structure
aoqi@0: // JVMSpec|   method_info {
aoqi@0: // JVMSpec|     u2 access_flags;
aoqi@0: // JVMSpec|     u2 name_index;
aoqi@0: // JVMSpec|     u2 descriptor_index;
aoqi@0: // JVMSpec|     u2 attributes_count;
aoqi@0: // JVMSpec|     attribute_info attributes[attributes_count];
aoqi@0: // JVMSpec|   }
aoqi@0: void JvmtiClassFileReconstituter::write_method_info(methodHandle method) {
aoqi@0:   AccessFlags access_flags = method->access_flags();
aoqi@0:   ConstMethod* const_method = method->constMethod();
aoqi@0:   u2 generic_signature_index = const_method->generic_signature_index();
aoqi@0:   AnnotationArray* anno = method->annotations();
aoqi@0:   AnnotationArray* param_anno = method->parameter_annotations();
aoqi@0:   AnnotationArray* default_anno = method->annotation_default();
aoqi@0: 
aoqi@0:   // skip generated default interface methods
aoqi@0:   if (method->is_overpass()) {
aoqi@0:     return;
aoqi@0:   }
aoqi@0: 
aoqi@0:   write_u2(access_flags.get_flags() & JVM_RECOGNIZED_METHOD_MODIFIERS);
aoqi@0:   write_u2(const_method->name_index());
aoqi@0:   write_u2(const_method->signature_index());
aoqi@0: 
aoqi@0:   // write attributes in the same order javac does, so we can test with byte for
aoqi@0:   // byte comparison
aoqi@0:   int attr_count = 0;
aoqi@0:   if (const_method->code_size() != 0) {
aoqi@0:     ++attr_count;     // has Code attribute
aoqi@0:   }
aoqi@0:   if (const_method->has_checked_exceptions()) {
aoqi@0:     ++attr_count;     // has Exceptions attribute
aoqi@0:   }
aoqi@0:   if (default_anno != NULL) {
aoqi@0:     ++attr_count;     // has AnnotationDefault attribute
aoqi@0:   }
aoqi@0:   // Deprecated attribute would go here
aoqi@0:   if (access_flags.is_synthetic()) { // FIXME
aoqi@0:     // ++attr_count;
aoqi@0:   }
aoqi@0:   if (generic_signature_index != 0) {
aoqi@0:     ++attr_count;
aoqi@0:   }
aoqi@0:   if (anno != NULL) {
aoqi@0:     ++attr_count;     // has RuntimeVisibleAnnotations attribute
aoqi@0:   }
aoqi@0:   if (param_anno != NULL) {
aoqi@0:     ++attr_count;     // has RuntimeVisibleParameterAnnotations attribute
aoqi@0:   }
aoqi@0: 
aoqi@0:   write_u2(attr_count);
aoqi@0:   if (const_method->code_size() > 0) {
aoqi@0:     write_code_attribute(method);
aoqi@0:   }
aoqi@0:   if (const_method->has_checked_exceptions()) {
aoqi@0:     write_exceptions_attribute(const_method);
aoqi@0:   }
aoqi@0:   if (default_anno != NULL) {
aoqi@0:     write_annotations_attribute("AnnotationDefault", default_anno);
aoqi@0:   }
aoqi@0:   // Deprecated attribute would go here
aoqi@0:   if (access_flags.is_synthetic()) {
aoqi@0:     // write_synthetic_attribute();
aoqi@0:   }
aoqi@0:   if (generic_signature_index != 0) {
aoqi@0:     write_signature_attribute(generic_signature_index);
aoqi@0:   }
aoqi@0:   if (anno != NULL) {
aoqi@0:     write_annotations_attribute("RuntimeVisibleAnnotations", anno);
aoqi@0:   }
aoqi@0:   if (param_anno != NULL) {
aoqi@0:     write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // Write the class attributes portion of ClassFile structure
aoqi@0: // JVMSpec|     u2 attributes_count;
aoqi@0: // JVMSpec|     attribute_info attributes[attributes_count];
aoqi@0: void JvmtiClassFileReconstituter::write_class_attributes() {
aoqi@0:   u2 inner_classes_length = inner_classes_attribute_length();
aoqi@0:   Symbol* generic_signature = ikh()->generic_signature();
aoqi@0:   AnnotationArray* anno = ikh()->class_annotations();
aoqi@0: 
aoqi@0:   int attr_count = 0;
aoqi@0:   if (generic_signature != NULL) {
aoqi@0:     ++attr_count;
aoqi@0:   }
aoqi@0:   if (ikh()->source_file_name() != NULL) {
aoqi@0:     ++attr_count;
aoqi@0:   }
aoqi@0:   if (ikh()->source_debug_extension() != NULL) {
aoqi@0:     ++attr_count;
aoqi@0:   }
aoqi@0:   if (inner_classes_length > 0) {
aoqi@0:     ++attr_count;
aoqi@0:   }
aoqi@0:   if (anno != NULL) {
aoqi@0:     ++attr_count;     // has RuntimeVisibleAnnotations attribute
aoqi@0:   }
aoqi@0:   if (cpool()->operands() != NULL) {
aoqi@0:     ++attr_count;
aoqi@0:   }
aoqi@0: 
aoqi@0:   write_u2(attr_count);
aoqi@0: 
aoqi@0:   if (generic_signature != NULL) {
aoqi@0:     write_signature_attribute(symbol_to_cpool_index(generic_signature));
aoqi@0:   }
aoqi@0:   if (ikh()->source_file_name() != NULL) {
aoqi@0:     write_source_file_attribute();
aoqi@0:   }
aoqi@0:   if (ikh()->source_debug_extension() != NULL) {
aoqi@0:     write_source_debug_extension_attribute();
aoqi@0:   }
aoqi@0:   if (inner_classes_length > 0) {
aoqi@0:     write_inner_classes_attribute(inner_classes_length);
aoqi@0:   }
aoqi@0:   if (anno != NULL) {
aoqi@0:     write_annotations_attribute("RuntimeVisibleAnnotations", anno);
aoqi@0:   }
aoqi@0:   if (cpool()->operands() != NULL) {
aoqi@0:     write_bootstrapmethod_attribute();
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // Write the method information portion of ClassFile structure
aoqi@0: // JVMSpec|     u2 methods_count;
aoqi@0: // JVMSpec|     method_info methods[methods_count];
aoqi@0: void JvmtiClassFileReconstituter::write_method_infos() {
aoqi@0:   HandleMark hm(thread());
aoqi@0:   Array<Method*>* methods = ikh()->methods();
aoqi@0:   int num_methods = methods->length();
aoqi@0:   int num_overpass = 0;
aoqi@0: 
aoqi@0:   // count the generated default interface methods
aoqi@0:   // these will not be re-created by write_method_info
aoqi@0:   // and should not be included in the total count
aoqi@0:   for (int index = 0; index < num_methods; index++) {
aoqi@0:     Method* method = methods->at(index);
aoqi@0:     if (method->is_overpass()) {
aoqi@0:       num_overpass++;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   write_u2(num_methods - num_overpass);
aoqi@0:   if (JvmtiExport::can_maintain_original_method_order()) {
aoqi@0:     int index;
aoqi@0:     int original_index;
aoqi@0:     intArray method_order(num_methods, 0);
aoqi@0: 
aoqi@0:     // invert the method order mapping
aoqi@0:     for (index = 0; index < num_methods; index++) {
aoqi@0:       original_index = ikh()->method_ordering()->at(index);
aoqi@0:       assert(original_index >= 0 && original_index < num_methods,
aoqi@0:              "invalid original method index");
aoqi@0:       method_order.at_put(original_index, index);
aoqi@0:     }
aoqi@0: 
aoqi@0:     // write in original order
aoqi@0:     for (original_index = 0; original_index < num_methods; original_index++) {
aoqi@0:       index = method_order.at(original_index);
aoqi@0:       methodHandle method(thread(), methods->at(index));
aoqi@0:       write_method_info(method);
aoqi@0:     }
aoqi@0:   } else {
aoqi@0:     // method order not preserved just dump the method infos
aoqi@0:     for (int index = 0; index < num_methods; index++) {
aoqi@0:       methodHandle method(thread(), methods->at(index));
aoqi@0:       write_method_info(method);
aoqi@0:     }
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: void JvmtiClassFileReconstituter::write_class_file_format() {
aoqi@0:   ReallocMark();
aoqi@0: 
aoqi@0:   // JVMSpec|   ClassFile {
aoqi@0:   // JVMSpec|           u4 magic;
aoqi@0:   write_u4(0xCAFEBABE);
aoqi@0: 
aoqi@0:   // JVMSpec|           u2 minor_version;
aoqi@0:   // JVMSpec|           u2 major_version;
aoqi@0:   write_u2(ikh()->minor_version());
aoqi@0:   u2 major = ikh()->major_version();
aoqi@0:   write_u2(major);
aoqi@0: 
aoqi@0:   // JVMSpec|           u2 constant_pool_count;
aoqi@0:   // JVMSpec|           cp_info constant_pool[constant_pool_count-1];
aoqi@0:   write_u2(cpool()->length());
aoqi@0:   copy_cpool_bytes(writeable_address(cpool_size()));
aoqi@0: 
aoqi@0:   // JVMSpec|           u2 access_flags;
aoqi@0:   write_u2(ikh()->access_flags().get_flags() & JVM_RECOGNIZED_CLASS_MODIFIERS);
aoqi@0: 
aoqi@0:   // JVMSpec|           u2 this_class;
aoqi@0:   // JVMSpec|           u2 super_class;
aoqi@0:   write_u2(class_symbol_to_cpool_index(ikh()->name()));
aoqi@0:   Klass* super_class = ikh()->super();
aoqi@0:   write_u2(super_class == NULL? 0 :  // zero for java.lang.Object
aoqi@0:                 class_symbol_to_cpool_index(super_class->name()));
aoqi@0: 
aoqi@0:   // JVMSpec|           u2 interfaces_count;
aoqi@0:   // JVMSpec|           u2 interfaces[interfaces_count];
aoqi@0:   Array<Klass*>* interfaces =  ikh()->local_interfaces();
aoqi@0:   int num_interfaces = interfaces->length();
aoqi@0:   write_u2(num_interfaces);
aoqi@0:   for (int index = 0; index < num_interfaces; index++) {
aoqi@0:     HandleMark hm(thread());
aoqi@0:     instanceKlassHandle iikh(thread(), interfaces->at(index));
aoqi@0:     write_u2(class_symbol_to_cpool_index(iikh->name()));
aoqi@0:   }
aoqi@0: 
aoqi@0:   // JVMSpec|           u2 fields_count;
aoqi@0:   // JVMSpec|           field_info fields[fields_count];
aoqi@0:   write_field_infos();
aoqi@0: 
aoqi@0:   // JVMSpec|           u2 methods_count;
aoqi@0:   // JVMSpec|           method_info methods[methods_count];
aoqi@0:   write_method_infos();
aoqi@0: 
aoqi@0:   // JVMSpec|           u2 attributes_count;
aoqi@0:   // JVMSpec|           attribute_info attributes[attributes_count];
aoqi@0:   // JVMSpec|   } /* end ClassFile 8?
aoqi@0:   write_class_attributes();
aoqi@0: }
aoqi@0: 
aoqi@0: address JvmtiClassFileReconstituter::writeable_address(size_t size) {
aoqi@0:   size_t used_size = _buffer_ptr - _buffer;
aoqi@0:   if (size + used_size >= _buffer_size) {
aoqi@0:     // compute the new buffer size: must be at least twice as big as before
aoqi@0:     // plus whatever new is being used; then convert to nice clean block boundary
aoqi@0:     size_t new_buffer_size = (size + _buffer_size*2 + 1) / initial_buffer_size
aoqi@0:                                                          * initial_buffer_size;
aoqi@0: 
aoqi@0:     // VM goes belly-up if the memory isn't available, so cannot do OOM processing
aoqi@0:     _buffer = REALLOC_RESOURCE_ARRAY(u1, _buffer, _buffer_size, new_buffer_size);
aoqi@0:     _buffer_size = new_buffer_size;
aoqi@0:     _buffer_ptr = _buffer + used_size;
aoqi@0:   }
aoqi@0:   u1* ret_ptr = _buffer_ptr;
aoqi@0:   _buffer_ptr += size;
aoqi@0:   return ret_ptr;
aoqi@0: }
aoqi@0: 
aoqi@0: void JvmtiClassFileReconstituter::write_attribute_name_index(const char* name) {
aoqi@0:   TempNewSymbol sym = SymbolTable::probe(name, (int)strlen(name));
aoqi@0:   assert(sym != NULL, "attribute name symbol not found");
aoqi@0:   u2 attr_name_index = symbol_to_cpool_index(sym);
aoqi@0:   assert(attr_name_index != 0, "attribute name symbol not in constant pool");
aoqi@0:   write_u2(attr_name_index);
aoqi@0: }
aoqi@0: 
aoqi@0: void JvmtiClassFileReconstituter::write_u1(u1 x) {
aoqi@0:   *writeable_address(1) = x;
aoqi@0: }
aoqi@0: 
aoqi@0: void JvmtiClassFileReconstituter::write_u2(u2 x) {
aoqi@0:   Bytes::put_Java_u2(writeable_address(2), x);
aoqi@0: }
aoqi@0: 
aoqi@0: void JvmtiClassFileReconstituter::write_u4(u4 x) {
aoqi@0:   Bytes::put_Java_u4(writeable_address(4), x);
aoqi@0: }
aoqi@0: 
aoqi@0: void JvmtiClassFileReconstituter::write_u8(u8 x) {
aoqi@0:   Bytes::put_Java_u8(writeable_address(8), x);
aoqi@0: }
aoqi@0: 
aoqi@0: void JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh,
aoqi@0:                                                  unsigned char* bytecodes) {
aoqi@0:   // use a BytecodeStream to iterate over the bytecodes. JVM/fast bytecodes
aoqi@0:   // and the breakpoint bytecode are converted to their original bytecodes.
aoqi@0: 
aoqi@0:   BytecodeStream bs(mh);
aoqi@0: 
aoqi@0:   unsigned char* p = bytecodes;
aoqi@0:   Bytecodes::Code code;
aoqi@0:   bool is_rewritten = mh->method_holder()->is_rewritten();
aoqi@0: 
aoqi@0:   while ((code = bs.next()) >= 0) {
aoqi@0:     assert(Bytecodes::is_java_code(code), "sanity check");
aoqi@0:     assert(code != Bytecodes::_breakpoint, "sanity check");
aoqi@0: 
aoqi@0:     // length of bytecode (mnemonic + operands)
aoqi@0:     address bcp = bs.bcp();
aoqi@0:     int     len = bs.instruction_size();
aoqi@0:     assert(len > 0, "length must be > 0");
aoqi@0: 
aoqi@0:     // copy the bytecodes
aoqi@0:     *p = (unsigned char) (bs.is_wide()? Bytecodes::_wide : code);
aoqi@0:     if (len > 1) {
aoqi@0:       memcpy(p+1, bcp+1, len-1);
aoqi@0:     }
aoqi@0: 
aoqi@0:     // During linking the get/put and invoke instructions are rewritten
aoqi@0:     // with an index into the constant pool cache. The original constant
aoqi@0:     // pool index must be returned to caller.  Rewrite the index.
aoqi@0:     if (is_rewritten && len > 1) {
aoqi@0:       bool is_wide = false;
aoqi@0:       switch (code) {
aoqi@0:       case Bytecodes::_getstatic       :  // fall through
aoqi@0:       case Bytecodes::_putstatic       :  // fall through
aoqi@0:       case Bytecodes::_getfield        :  // fall through
aoqi@0:       case Bytecodes::_putfield        :  // fall through
aoqi@0:       case Bytecodes::_invokevirtual   :  // fall through
aoqi@0:       case Bytecodes::_invokespecial   :  // fall through
aoqi@0:       case Bytecodes::_invokestatic    :  // fall through
aoqi@0:       case Bytecodes::_invokedynamic   :  // fall through
aoqi@0:       case Bytecodes::_invokeinterface : {
aoqi@0:         assert(len == 3 ||
aoqi@0:                (code == Bytecodes::_invokeinterface && len == 5) ||
aoqi@0:                (code == Bytecodes::_invokedynamic   && len == 5),
aoqi@0:                "sanity check");
aoqi@0: 
aoqi@0:         int cpci = Bytes::get_native_u2(bcp+1);
aoqi@0:         bool is_invokedynamic = (EnableInvokeDynamic && code == Bytecodes::_invokedynamic);
aoqi@0:         ConstantPoolCacheEntry* entry;
aoqi@0:         if (is_invokedynamic) {
aoqi@0:           cpci = Bytes::get_native_u4(bcp+1);
aoqi@0:           entry = mh->constants()->invokedynamic_cp_cache_entry_at(cpci);
aoqi@0:         } else {
aoqi@0:         // cache cannot be pre-fetched since some classes won't have it yet
aoqi@0:           entry = mh->constants()->cache()->entry_at(cpci);
aoqi@0:         }
aoqi@0:         int i = entry->constant_pool_index();
aoqi@0:         assert(i < mh->constants()->length(), "sanity check");
aoqi@0:         Bytes::put_Java_u2((address)(p+1), (u2)i);     // java byte ordering
aoqi@0:         if (is_invokedynamic)  *(p+3) = *(p+4) = 0;
aoqi@0:         break;
aoqi@0:       }
aoqi@0:       case Bytecodes::_ldc_w:
aoqi@0:         is_wide = true; // fall through
aoqi@0:       case Bytecodes::_ldc: {
aoqi@0:         if (bs.raw_code() == Bytecodes::_fast_aldc || bs.raw_code() == Bytecodes::_fast_aldc_w) {
aoqi@0:           int cpci = is_wide ? Bytes::get_native_u2(bcp+1) : (u1)(*(bcp+1));
aoqi@0:           int i = mh->constants()->object_to_cp_index(cpci);
aoqi@0:           assert(i < mh->constants()->length(), "sanity check");
aoqi@0:           if (is_wide) {
aoqi@0:             Bytes::put_Java_u2((address)(p+1), (u2)i);     // java byte ordering
aoqi@0:           } else {
aoqi@0:             *(p+1) = (u1)i;
aoqi@0:           }
aoqi@0:         }
aoqi@0:         break;
aoqi@0:         }
aoqi@0:       }
aoqi@0:     }
aoqi@0: 
aoqi@0:     p += len;
aoqi@0:   }
aoqi@0: }