C++ (Cpp) fields_anno Examples

Example #1

File: jvmtiClassFileReconstituter.cpp Project: zarue/jdk7u-hotspot

// Write the field information portion of ClassFile structure
// JVMSpec|     u2 fields_count;
// JVMSpec|     field_info fields[fields_count];
void JvmtiClassFileReconstituter::write_field_infos() {
  HandleMark hm(thread());
  objArrayHandle fields_anno(thread(), ikh()->fields_annotations());

  // Compute the real number of Java fields
  int java_fields = ikh()->java_fields_count();

  write_u2(java_fields);
  for (JavaFieldStream fs(ikh()); !fs.done(); fs.next()) {
    AccessFlags access_flags = fs.access_flags();
    int name_index = fs.name_index();
    int signature_index = fs.signature_index();
    int initial_value_index = fs.initval_index();
    guarantee(name_index != 0 && signature_index != 0, "bad constant pool index for field");
    // int offset = ikh()->field_offset( index );
    int generic_signature_index = fs.generic_signature_index();
    typeArrayHandle anno(thread(), fields_anno.not_null() ?
                                 (typeArrayOop)(fields_anno->obj_at(fs.index())) :
                                 (typeArrayOop)NULL);

    // JVMSpec|   field_info {
    // JVMSpec|         u2 access_flags;
    // JVMSpec|         u2 name_index;
    // JVMSpec|         u2 descriptor_index;
    // JVMSpec|         u2 attributes_count;
    // JVMSpec|         attribute_info attributes[attributes_count];
    // JVMSpec|   }

    write_u2(access_flags.as_int() & JVM_RECOGNIZED_FIELD_MODIFIERS);
    write_u2(name_index);
    write_u2(signature_index);
    int attr_count = 0;
    if (initial_value_index != 0) {
      ++attr_count;
    }
    if (access_flags.is_synthetic()) {
      // ++attr_count;
    }
    if (generic_signature_index != 0) {
      ++attr_count;
    }
    if (anno.not_null()) {
      ++attr_count;     // has RuntimeVisibleAnnotations attribute
    }

    write_u2(attr_count);

    if (initial_value_index != 0) {
      write_attribute_name_index("ConstantValue");
      write_u4(2); //length always 2
      write_u2(initial_value_index);
    }
    if (access_flags.is_synthetic()) {
      // write_synthetic_attribute();
    }
    if (generic_signature_index != 0) {
      write_signature_attribute(generic_signature_index);
    }
    if (anno.not_null()) {
      write_annotations_attribute("RuntimeVisibleAnnotations", anno);
    }
  }
}

Example #2

File: jvmtiClassFileReconstituter.cpp Project: GregBowyer/ManagedRuntimeInitiative

// Write the field information portion of ClassFile structure
// JVMSpec|   	u2 fields_count;
// JVMSpec|   	field_info fields[fields_count];
void JvmtiClassFileReconstituter::write_field_infos() {  
  HandleMark hm(thread());
  typeArrayHandle fields(thread(), ikh()->fields());
  int fields_length = fields->length();
  int num_fields = fields_length / instanceKlass::next_offset;
  objArrayHandle fields_anno(thread(), ikh()->fields_annotations());

  write_u2(num_fields);  
  for (int index = 0; index < fields_length; index += instanceKlass::next_offset) {
    AccessFlags access_flags;
    int flags = fields->ushort_at(index + instanceKlass::access_flags_offset);
    access_flags.set_flags(flags);
    int name_index = fields->ushort_at(index + instanceKlass::name_index_offset);
    int signature_index = fields->ushort_at(index + instanceKlass::signature_index_offset);
    int initial_value_index = fields->ushort_at(index + instanceKlass::initval_index_offset);
    guarantee(name_index != 0 && signature_index != 0, "bad constant pool index for field");
    int offset = ikh()->offset_from_fields( index );
    int generic_signature_index = 
                        fields->ushort_at(index + instanceKlass::generic_signature_offset);
    typeArrayHandle anno(thread(), fields_anno.not_null() ? 
                                 (typeArrayOop)(fields_anno->obj_at(index / instanceKlass::next_offset)) :
                                 (typeArrayOop)NULL);

    // JVMSpec|   field_info {
    // JVMSpec|   	u2 access_flags;
    // JVMSpec|   	u2 name_index;
    // JVMSpec|   	u2 descriptor_index;
    // JVMSpec|   	u2 attributes_count;
    // JVMSpec|   	attribute_info attributes[attributes_count];
    // JVMSpec|   }

    write_u2(flags & JVM_RECOGNIZED_FIELD_MODIFIERS); 
    write_u2(name_index); 
    write_u2(signature_index); 
    int attr_count = 0;
    if (initial_value_index != 0) {
      ++attr_count;
    }
    if (access_flags.is_synthetic()) {
      // ++attr_count;
    }
    if (generic_signature_index != 0) {
      ++attr_count;
    }
    if (anno.not_null()) {
      ++attr_count;     // has RuntimeVisibleAnnotations attribute
    }

    write_u2(attr_count); 

    if (initial_value_index != 0) {
      write_attribute_name_index("ConstantValue");
      write_u4(2); //length always 2
      write_u2(initial_value_index);
    }
    if (access_flags.is_synthetic()) {
      // write_synthetic_attribute();
    }
    if (generic_signature_index != 0) {
      write_signature_attribute(generic_signature_index);
    }
    if (anno.not_null()) {
      write_annotations_attribute("RuntimeVisibleAnnotations", anno);
    }
  }
}