jvmtiClassFileReconstituter.cpp revision 1485
0N/A/*
1485N/A * Copyright 2005-2010 Sun Microsystems, Inc. All Rights Reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
0N/A * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
0N/A * CA 95054 USA or visit www.sun.com if you need additional information or
0N/A * have any questions.
0N/A *
0N/A */
0N/A# include "incls/_precompiled.incl"
0N/A# include "incls/_jvmtiClassFileReconstituter.cpp.incl"
0N/A
0N/A// FIXME: add Deprecated, LVT, LVTT attributes
0N/A// FIXME: fix Synthetic attribute
0N/A// FIXME: per Serguei, add error return handling for constantPoolOopDesc::copy_cpool_bytes()
0N/A
0N/A
0N/A// Write the field information portion of ClassFile structure
0N/A// JVMSpec| u2 fields_count;
0N/A// JVMSpec| field_info fields[fields_count];
0N/Avoid JvmtiClassFileReconstituter::write_field_infos() {
0N/A HandleMark hm(thread());
0N/A typeArrayHandle fields(thread(), ikh()->fields());
0N/A int fields_length = fields->length();
0N/A int num_fields = fields_length / instanceKlass::next_offset;
0N/A objArrayHandle fields_anno(thread(), ikh()->fields_annotations());
0N/A
0N/A write_u2(num_fields);
0N/A for (int index = 0; index < fields_length; index += instanceKlass::next_offset) {
0N/A AccessFlags access_flags;
0N/A int flags = fields->ushort_at(index + instanceKlass::access_flags_offset);
0N/A access_flags.set_flags(flags);
0N/A int name_index = fields->ushort_at(index + instanceKlass::name_index_offset);
0N/A int signature_index = fields->ushort_at(index + instanceKlass::signature_index_offset);
0N/A int initial_value_index = fields->ushort_at(index + instanceKlass::initval_index_offset);
0N/A guarantee(name_index != 0 && signature_index != 0, "bad constant pool index for field");
0N/A int offset = ikh()->offset_from_fields( index );
0N/A int generic_signature_index =
0N/A fields->ushort_at(index + instanceKlass::generic_signature_offset);
0N/A typeArrayHandle anno(thread(), fields_anno.not_null() ?
0N/A (typeArrayOop)(fields_anno->obj_at(index / instanceKlass::next_offset)) :
0N/A (typeArrayOop)NULL);
0N/A
0N/A // JVMSpec| field_info {
0N/A // JVMSpec| u2 access_flags;
0N/A // JVMSpec| u2 name_index;
0N/A // JVMSpec| u2 descriptor_index;
0N/A // JVMSpec| u2 attributes_count;
0N/A // JVMSpec| attribute_info attributes[attributes_count];
0N/A // JVMSpec| }
0N/A
0N/A write_u2(flags & JVM_RECOGNIZED_FIELD_MODIFIERS);
0N/A write_u2(name_index);
0N/A write_u2(signature_index);
0N/A int attr_count = 0;
0N/A if (initial_value_index != 0) {
0N/A ++attr_count;
0N/A }
0N/A if (access_flags.is_synthetic()) {
0N/A // ++attr_count;
0N/A }
0N/A if (generic_signature_index != 0) {
0N/A ++attr_count;
0N/A }
0N/A if (anno.not_null()) {
0N/A ++attr_count; // has RuntimeVisibleAnnotations attribute
0N/A }
0N/A
0N/A write_u2(attr_count);
0N/A
0N/A if (initial_value_index != 0) {
0N/A write_attribute_name_index("ConstantValue");
0N/A write_u4(2); //length always 2
0N/A write_u2(initial_value_index);
0N/A }
0N/A if (access_flags.is_synthetic()) {
0N/A // write_synthetic_attribute();
0N/A }
0N/A if (generic_signature_index != 0) {
0N/A write_signature_attribute(generic_signature_index);
0N/A }
0N/A if (anno.not_null()) {
0N/A write_annotations_attribute("RuntimeVisibleAnnotations", anno);
0N/A }
0N/A }
0N/A}
0N/A
0N/A// Write Code attribute
0N/A// JVMSpec| Code_attribute {
0N/A// JVMSpec| u2 attribute_name_index;
0N/A// JVMSpec| u4 attribute_length;
0N/A// JVMSpec| u2 max_stack;
0N/A// JVMSpec| u2 max_locals;
0N/A// JVMSpec| u4 code_length;
0N/A// JVMSpec| u1 code[code_length];
0N/A// JVMSpec| u2 exception_table_length;
0N/A// JVMSpec| { u2 start_pc;
0N/A// JVMSpec| u2 end_pc;
0N/A// JVMSpec| u2 handler_pc;
0N/A// JVMSpec| u2 catch_type;
0N/A// JVMSpec| } exception_table[exception_table_length];
0N/A// JVMSpec| u2 attributes_count;
0N/A// JVMSpec| attribute_info attributes[attributes_count];
0N/A// JVMSpec| }
0N/Avoid JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) {
0N/A constMethodHandle const_method(thread(), method->constMethod());
0N/A u2 line_num_cnt = 0;
0N/A int stackmap_len = 0;
0N/A
0N/A // compute number and length of attributes -- FIXME: for now no LVT
0N/A int attr_count = 0;
0N/A int attr_size = 0;
0N/A if (const_method->has_linenumber_table()) {
0N/A line_num_cnt = line_number_table_entries(method);
0N/A if (line_num_cnt != 0) {
0N/A ++attr_count;
0N/A // Compute the complete size of the line number table attribute:
0N/A // LineNumberTable_attribute {
0N/A // u2 attribute_name_index;
0N/A // u4 attribute_length;
0N/A // u2 line_number_table_length;
0N/A // { u2 start_pc;
0N/A // u2 line_number;
0N/A // } line_number_table[line_number_table_length];
0N/A // }
0N/A attr_size += 2 + 4 + 2 + line_num_cnt * (2 + 2);
0N/A }
0N/A }
0N/A if (method->has_stackmap_table()) {
0N/A stackmap_len = method->stackmap_data()->length();
0N/A if (stackmap_len != 0) {
0N/A ++attr_count;
0N/A // Compute the size of the stack map table attribute (VM stores raw):
0N/A // StackMapTable_attribute {
0N/A // u2 attribute_name_index;
0N/A // u4 attribute_length;
0N/A // u2 number_of_entries;
0N/A // stack_map_frame_entries[number_of_entries];
0N/A // }
0N/A attr_size += 2 + 4 + stackmap_len;
0N/A }
0N/A }
0N/A
0N/A typeArrayHandle exception_table(thread(), const_method->exception_table());
0N/A int exception_table_length = exception_table->length();
0N/A int exception_table_entries = exception_table_length / 4;
0N/A int code_size = const_method->code_size();
0N/A int size =
0N/A 2+2+4 + // max_stack, max_locals, code_length
0N/A code_size + // code
0N/A 2 + // exception_table_length
0N/A (2+2+2+2) * exception_table_entries + // exception_table
0N/A 2 + // attributes_count
0N/A attr_size; // attributes
0N/A
0N/A write_attribute_name_index("Code");
0N/A write_u4(size);
0N/A write_u2(method->max_stack());
0N/A write_u2(method->max_locals());
0N/A write_u4(code_size);
0N/A copy_bytecodes(method, (unsigned char*)writeable_address(code_size));
0N/A write_u2(exception_table_entries);
0N/A for (int index = 0; index < exception_table_length; ) {
0N/A write_u2(exception_table->int_at(index++));
0N/A write_u2(exception_table->int_at(index++));
0N/A write_u2(exception_table->int_at(index++));
0N/A write_u2(exception_table->int_at(index++));
0N/A }
0N/A write_u2(attr_count);
0N/A if (line_num_cnt != 0) {
0N/A write_line_number_table_attribute(method, line_num_cnt);
0N/A }
0N/A if (stackmap_len != 0) {
0N/A write_stackmap_table_attribute(method, stackmap_len);
0N/A }
0N/A
0N/A // FIXME: write LVT attribute
0N/A}
0N/A
0N/A// Write Exceptions attribute
0N/A// JVMSpec| Exceptions_attribute {
0N/A// JVMSpec| u2 attribute_name_index;
0N/A// JVMSpec| u4 attribute_length;
0N/A// JVMSpec| u2 number_of_exceptions;
0N/A// JVMSpec| u2 exception_index_table[number_of_exceptions];
0N/A// JVMSpec| }
0N/Avoid JvmtiClassFileReconstituter::write_exceptions_attribute(constMethodHandle const_method) {
0N/A CheckedExceptionElement* checked_exceptions = const_method->checked_exceptions_start();
0N/A int checked_exceptions_length = const_method->checked_exceptions_length();
0N/A int size =
0N/A 2 + // number_of_exceptions
0N/A 2 * checked_exceptions_length; // exception_index_table
0N/A
0N/A write_attribute_name_index("Exceptions");
0N/A write_u4(size);
0N/A write_u2(checked_exceptions_length);
0N/A for (int index = 0; index < checked_exceptions_length; index++) {
0N/A write_u2(checked_exceptions[index].class_cp_index);
0N/A }
0N/A}
0N/A
0N/A// Write SourceFile attribute
0N/A// JVMSpec| SourceFile_attribute {
0N/A// JVMSpec| u2 attribute_name_index;
0N/A// JVMSpec| u4 attribute_length;
0N/A// JVMSpec| u2 sourcefile_index;
0N/A// JVMSpec| }
0N/Avoid JvmtiClassFileReconstituter::write_source_file_attribute() {
0N/A assert(ikh()->source_file_name() != NULL, "caller must check");
0N/A
0N/A write_attribute_name_index("SourceFile");
0N/A write_u4(2); // always length 2
0N/A write_u2(symbol_to_cpool_index(ikh()->source_file_name()));
0N/A}
0N/A
0N/A// Write SourceDebugExtension attribute
0N/A// JSR45| SourceDebugExtension_attribute {
0N/A// JSR45| u2 attribute_name_index;
0N/A// JSR45| u4 attribute_length;
0N/A// JSR45| u2 sourcefile_index;
0N/A// JSR45| }
0N/Avoid JvmtiClassFileReconstituter::write_source_debug_extension_attribute() {
0N/A assert(ikh()->source_debug_extension() != NULL, "caller must check");
0N/A
0N/A write_attribute_name_index("SourceDebugExtension");
0N/A write_u4(2); // always length 2
0N/A write_u2(symbol_to_cpool_index(ikh()->source_debug_extension()));
0N/A}
0N/A
0N/A// Write (generic) Signature attribute
0N/A// JVMSpec| Signature_attribute {
0N/A// JVMSpec| u2 attribute_name_index;
0N/A// JVMSpec| u4 attribute_length;
0N/A// JVMSpec| u2 signature_index;
0N/A// JVMSpec| }
0N/Avoid JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) {
0N/A write_attribute_name_index("Signature");
0N/A write_u4(2); // always length 2
0N/A write_u2(generic_signature_index);
0N/A}
0N/A
0N/A// Compute the number of entries in the InnerClasses attribute
0N/Au2 JvmtiClassFileReconstituter::inner_classes_attribute_length() {
0N/A typeArrayOop inner_class_list = ikh()->inner_classes();
0N/A return (inner_class_list == NULL) ? 0 : inner_class_list->length();
0N/A}
0N/A
0N/A// Write an annotation attribute. The VM stores them in raw form, so all we need
0N/A// to do is add the attrubute name and fill in the length.
0N/A// JSR202| *Annotations_attribute {
0N/A// JSR202| u2 attribute_name_index;
0N/A// JSR202| u4 attribute_length;
0N/A// JSR202| ...
0N/A// JSR202| }
0N/Avoid JvmtiClassFileReconstituter::write_annotations_attribute(const char* attr_name,
0N/A typeArrayHandle annos) {
0N/A u4 length = annos->length();
0N/A write_attribute_name_index(attr_name);
0N/A write_u4(length);
0N/A memcpy(writeable_address(length), annos->byte_at_addr(0), length);
0N/A}
0N/A
0N/A
0N/A// Write InnerClasses attribute
0N/A// JVMSpec| InnerClasses_attribute {
0N/A// JVMSpec| u2 attribute_name_index;
0N/A// JVMSpec| u4 attribute_length;
0N/A// JVMSpec| u2 number_of_classes;
0N/A// JVMSpec| { u2 inner_class_info_index;
0N/A// JVMSpec| u2 outer_class_info_index;
0N/A// JVMSpec| u2 inner_name_index;
0N/A// JVMSpec| u2 inner_class_access_flags;
0N/A// JVMSpec| } classes[number_of_classes];
0N/A// JVMSpec| }
0N/Avoid JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) {
0N/A typeArrayOop inner_class_list = ikh()->inner_classes();
0N/A guarantee(inner_class_list != NULL && inner_class_list->length() == length,
0N/A "caller must check");
0N/A typeArrayHandle inner_class_list_h(thread(), inner_class_list);
0N/A assert (length % instanceKlass::inner_class_next_offset == 0, "just checking");
0N/A u2 entry_count = length / instanceKlass::inner_class_next_offset;
0N/A u4 size = 2 + entry_count * (2+2+2+2);
0N/A
0N/A write_attribute_name_index("InnerClasses");
0N/A write_u4(size);
0N/A write_u2(entry_count);
0N/A for (int i = 0; i < length; i += instanceKlass::inner_class_next_offset) {
0N/A write_u2(inner_class_list_h->ushort_at(
0N/A i + instanceKlass::inner_class_inner_class_info_offset));
0N/A write_u2(inner_class_list_h->ushort_at(
0N/A i + instanceKlass::inner_class_outer_class_info_offset));
0N/A write_u2(inner_class_list_h->ushort_at(
0N/A i + instanceKlass::inner_class_inner_name_offset));
0N/A write_u2(inner_class_list_h->ushort_at(
0N/A i + instanceKlass::inner_class_access_flags_offset));
0N/A }
0N/A}
0N/A
0N/A// Write Synthetic attribute
0N/A// JVMSpec| Synthetic_attribute {
0N/A// JVMSpec| u2 attribute_name_index;
0N/A// JVMSpec| u4 attribute_length;
0N/A// JVMSpec| }
0N/Avoid JvmtiClassFileReconstituter::write_synthetic_attribute() {
0N/A write_attribute_name_index("Synthetic");
0N/A write_u4(0); //length always zero
0N/A}
0N/A
0N/A// Compute size of LineNumberTable
0N/Au2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) {
0N/A // The line number table is compressed so we don't know how big it is until decompressed.
0N/A // Decompression is really fast so we just do it twice.
0N/A u2 num_entries = 0;
0N/A CompressedLineNumberReadStream stream(method->compressed_linenumber_table());
0N/A while (stream.read_pair()) {
0N/A num_entries++;
0N/A }
0N/A return num_entries;
0N/A}
0N/A
0N/A// Write LineNumberTable attribute
0N/A// JVMSpec| LineNumberTable_attribute {
0N/A// JVMSpec| u2 attribute_name_index;
0N/A// JVMSpec| u4 attribute_length;
0N/A// JVMSpec| u2 line_number_table_length;
0N/A// JVMSpec| { u2 start_pc;
0N/A// JVMSpec| u2 line_number;
0N/A// JVMSpec| } line_number_table[line_number_table_length];
0N/A// JVMSpec| }
0N/Avoid JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method,
0N/A u2 num_entries) {
0N/A
0N/A write_attribute_name_index("LineNumberTable");
0N/A write_u4(2 + num_entries * (2 + 2));
0N/A write_u2(num_entries);
0N/A
0N/A CompressedLineNumberReadStream stream(method->compressed_linenumber_table());
0N/A while (stream.read_pair()) {
0N/A write_u2(stream.bci());
0N/A write_u2(stream.line());
0N/A }
0N/A}
0N/A
0N/A// Write stack map table attribute
0N/A// JSR-202| StackMapTable_attribute {
0N/A// JSR-202| u2 attribute_name_index;
0N/A// JSR-202| u4 attribute_length;
0N/A// JSR-202| u2 number_of_entries;
0N/A// JSR-202| stack_map_frame_entries[number_of_entries];
0N/A// JSR-202| }
0N/Avoid JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method,
0N/A int stackmap_len) {
0N/A
0N/A write_attribute_name_index("StackMapTable");
0N/A write_u4(stackmap_len);
0N/A memcpy(
0N/A writeable_address(stackmap_len),
0N/A (void*)(method->stackmap_data()->byte_at_addr(0)),
0N/A stackmap_len);
0N/A}
0N/A
0N/A// Write one method_info structure
0N/A// JVMSpec| method_info {
0N/A// JVMSpec| u2 access_flags;
0N/A// JVMSpec| u2 name_index;
0N/A// JVMSpec| u2 descriptor_index;
0N/A// JVMSpec| u2 attributes_count;
0N/A// JVMSpec| attribute_info attributes[attributes_count];
0N/A// JVMSpec| }
0N/Avoid JvmtiClassFileReconstituter::write_method_info(methodHandle method) {
0N/A AccessFlags access_flags = method->access_flags();
0N/A constMethodHandle const_method(thread(), method->constMethod());
0N/A u2 generic_signature_index = const_method->generic_signature_index();
0N/A typeArrayHandle anno(thread(), method->annotations());
0N/A typeArrayHandle param_anno(thread(), method->parameter_annotations());
0N/A typeArrayHandle default_anno(thread(), method->annotation_default());
0N/A
0N/A write_u2(access_flags.get_flags() & JVM_RECOGNIZED_METHOD_MODIFIERS);
0N/A write_u2(const_method->name_index());
0N/A write_u2(const_method->signature_index());
0N/A
0N/A // write attributes in the same order javac does, so we can test with byte for
0N/A // byte comparison
0N/A int attr_count = 0;
0N/A if (const_method->code_size() != 0) {
0N/A ++attr_count; // has Code attribute
0N/A }
0N/A if (const_method->has_checked_exceptions()) {
0N/A ++attr_count; // has Exceptions attribute
0N/A }
0N/A if (default_anno.not_null()) {
0N/A ++attr_count; // has AnnotationDefault attribute
0N/A }
0N/A // Deprecated attribute would go here
0N/A if (access_flags.is_synthetic()) { // FIXME
0N/A // ++attr_count;
0N/A }
0N/A if (generic_signature_index != 0) {
0N/A ++attr_count;
0N/A }
0N/A if (anno.not_null()) {
0N/A ++attr_count; // has RuntimeVisibleAnnotations attribute
0N/A }
0N/A if (param_anno.not_null()) {
0N/A ++attr_count; // has RuntimeVisibleParameterAnnotations attribute
0N/A }
0N/A
0N/A write_u2(attr_count);
0N/A if (const_method->code_size() > 0) {
0N/A write_code_attribute(method);
0N/A }
0N/A if (const_method->has_checked_exceptions()) {
0N/A write_exceptions_attribute(const_method);
0N/A }
0N/A if (default_anno.not_null()) {
0N/A write_annotations_attribute("AnnotationDefault", default_anno);
0N/A }
0N/A // Deprecated attribute would go here
0N/A if (access_flags.is_synthetic()) {
0N/A // write_synthetic_attribute();
0N/A }
0N/A if (generic_signature_index != 0) {
0N/A write_signature_attribute(generic_signature_index);
0N/A }
0N/A if (anno.not_null()) {
0N/A write_annotations_attribute("RuntimeVisibleAnnotations", anno);
0N/A }
0N/A if (param_anno.not_null()) {
0N/A write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno);
0N/A }
0N/A}
0N/A
0N/A// Write the class attributes portion of ClassFile structure
0N/A// JVMSpec| u2 attributes_count;
0N/A// JVMSpec| attribute_info attributes[attributes_count];
0N/Avoid JvmtiClassFileReconstituter::write_class_attributes() {
0N/A u2 inner_classes_length = inner_classes_attribute_length();
0N/A symbolHandle generic_signature(thread(), ikh()->generic_signature());
0N/A typeArrayHandle anno(thread(), ikh()->class_annotations());
0N/A
0N/A int attr_count = 0;
0N/A if (generic_signature() != NULL) {
0N/A ++attr_count;
0N/A }
0N/A if (ikh()->source_file_name() != NULL) {
0N/A ++attr_count;
0N/A }
0N/A if (ikh()->source_debug_extension() != NULL) {
0N/A ++attr_count;
0N/A }
0N/A if (inner_classes_length > 0) {
0N/A ++attr_count;
0N/A }
0N/A if (anno.not_null()) {
0N/A ++attr_count; // has RuntimeVisibleAnnotations attribute
0N/A }
0N/A
0N/A write_u2(attr_count);
0N/A
0N/A if (generic_signature() != NULL) {
0N/A write_signature_attribute(symbol_to_cpool_index(generic_signature()));
0N/A }
0N/A if (ikh()->source_file_name() != NULL) {
0N/A write_source_file_attribute();
0N/A }
0N/A if (ikh()->source_debug_extension() != NULL) {
0N/A write_source_debug_extension_attribute();
0N/A }
0N/A if (inner_classes_length > 0) {
0N/A write_inner_classes_attribute(inner_classes_length);
0N/A }
0N/A if (anno.not_null()) {
0N/A write_annotations_attribute("RuntimeVisibleAnnotations", anno);
0N/A }
0N/A}
0N/A
0N/A// Write the method information portion of ClassFile structure
0N/A// JVMSpec| u2 methods_count;
0N/A// JVMSpec| method_info methods[methods_count];
0N/Avoid JvmtiClassFileReconstituter::write_method_infos() {
0N/A HandleMark hm(thread());
0N/A objArrayHandle methods(thread(), ikh()->methods());
0N/A int num_methods = methods->length();
0N/A
0N/A write_u2(num_methods);
0N/A if (JvmtiExport::can_maintain_original_method_order()) {
0N/A int index;
0N/A int original_index;
0N/A int* method_order = NEW_RESOURCE_ARRAY(int, num_methods);
0N/A
0N/A // invert the method order mapping
0N/A for (index = 0; index < num_methods; index++) {
0N/A original_index = ikh()->method_ordering()->int_at(index);
0N/A assert(original_index >= 0 && original_index < num_methods,
0N/A "invalid original method index");
0N/A method_order[original_index] = index;
0N/A }
0N/A
0N/A // write in original order
0N/A for (original_index = 0; original_index < num_methods; original_index++) {
0N/A index = method_order[original_index];
0N/A methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index)));
0N/A write_method_info(method);
0N/A }
0N/A } else {
0N/A // method order not preserved just dump the method infos
0N/A for (int index = 0; index < num_methods; index++) {
0N/A methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index)));
0N/A write_method_info(method);
0N/A }
0N/A }
0N/A}
0N/A
0N/Avoid JvmtiClassFileReconstituter::write_class_file_format() {
0N/A ReallocMark();
0N/A
0N/A // JVMSpec| ClassFile {
0N/A // JVMSpec| u4 magic;
0N/A write_u4(0xCAFEBABE);
0N/A
0N/A // JVMSpec| u2 minor_version;
0N/A // JVMSpec| u2 major_version;
0N/A write_u2(ikh()->minor_version());
0N/A u2 major = ikh()->major_version();
0N/A write_u2(major);
0N/A
0N/A // JVMSpec| u2 constant_pool_count;
0N/A // JVMSpec| cp_info constant_pool[constant_pool_count-1];
0N/A write_u2(cpool()->length());
0N/A copy_cpool_bytes(writeable_address(cpool_size()));
0N/A
0N/A // JVMSpec| u2 access_flags;
0N/A write_u2(ikh()->access_flags().get_flags() & JVM_RECOGNIZED_CLASS_MODIFIERS);
0N/A
0N/A // JVMSpec| u2 this_class;
0N/A // JVMSpec| u2 super_class;
0N/A write_u2(class_symbol_to_cpool_index(ikh()->name()));
0N/A klassOop super_class = ikh()->super();
0N/A write_u2(super_class == NULL? 0 : // zero for java.lang.Object
0N/A class_symbol_to_cpool_index(super_class->klass_part()->name()));
0N/A
0N/A // JVMSpec| u2 interfaces_count;
0N/A // JVMSpec| u2 interfaces[interfaces_count];
0N/A objArrayHandle interfaces(thread(), ikh()->local_interfaces());
0N/A int num_interfaces = interfaces->length();
0N/A write_u2(num_interfaces);
0N/A for (int index = 0; index < num_interfaces; index++) {
0N/A HandleMark hm(thread());
0N/A instanceKlassHandle iikh(thread(), klassOop(interfaces->obj_at(index)));
0N/A write_u2(class_symbol_to_cpool_index(iikh->name()));
0N/A }
0N/A
0N/A // JVMSpec| u2 fields_count;
0N/A // JVMSpec| field_info fields[fields_count];
0N/A write_field_infos();
0N/A
0N/A // JVMSpec| u2 methods_count;
0N/A // JVMSpec| method_info methods[methods_count];
0N/A write_method_infos();
0N/A
0N/A // JVMSpec| u2 attributes_count;
0N/A // JVMSpec| attribute_info attributes[attributes_count];
0N/A // JVMSpec| } /* end ClassFile 8?
0N/A write_class_attributes();
0N/A}
0N/A
0N/Aaddress JvmtiClassFileReconstituter::writeable_address(size_t size) {
0N/A size_t used_size = _buffer_ptr - _buffer;
0N/A if (size + used_size >= _buffer_size) {
0N/A // compute the new buffer size: must be at least twice as big as before
0N/A // plus whatever new is being used; then convert to nice clean block boundary
0N/A size_t new_buffer_size = (size + _buffer_size*2 + 1) / initial_buffer_size
0N/A * initial_buffer_size;
0N/A
0N/A // VM goes belly-up if the memory isn't available, so cannot do OOM processing
0N/A _buffer = REALLOC_RESOURCE_ARRAY(u1, _buffer, _buffer_size, new_buffer_size);
0N/A _buffer_size = new_buffer_size;
0N/A _buffer_ptr = _buffer + used_size;
0N/A }
0N/A u1* ret_ptr = _buffer_ptr;
0N/A _buffer_ptr += size;
0N/A return ret_ptr;
0N/A}
0N/A
0N/Avoid JvmtiClassFileReconstituter::write_attribute_name_index(const char* name) {
0N/A unsigned int hash_ignored;
0N/A symbolOop sym = SymbolTable::lookup_only(name, (int)strlen(name), hash_ignored);
0N/A assert(sym != NULL, "attribute name symbol not found");
0N/A u2 attr_name_index = symbol_to_cpool_index(sym);
0N/A assert(attr_name_index != 0, "attribute name symbol not in constant pool");
0N/A write_u2(attr_name_index);
0N/A}
0N/A
0N/Avoid JvmtiClassFileReconstituter::write_u1(u1 x) {
0N/A *writeable_address(1) = x;
0N/A}
0N/A
0N/Avoid JvmtiClassFileReconstituter::write_u2(u2 x) {
0N/A Bytes::put_Java_u2(writeable_address(2), x);
0N/A}
0N/A
0N/Avoid JvmtiClassFileReconstituter::write_u4(u4 x) {
0N/A Bytes::put_Java_u4(writeable_address(4), x);
0N/A}
0N/A
0N/Avoid JvmtiClassFileReconstituter::write_u8(u8 x) {
0N/A Bytes::put_Java_u8(writeable_address(8), x);
0N/A}
0N/A
0N/Avoid JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh,
0N/A unsigned char* bytecodes) {
0N/A // use a BytecodeStream to iterate over the bytecodes. JVM/fast bytecodes
0N/A // and the breakpoint bytecode are converted to their original bytecodes.
0N/A
0N/A BytecodeStream bs(mh);
0N/A
0N/A unsigned char* p = bytecodes;
0N/A Bytecodes::Code code;
0N/A bool is_rewritten = instanceKlass::cast(mh->method_holder())->is_rewritten();
0N/A
0N/A while ((code = bs.next()) >= 0) {
0N/A assert(Bytecodes::is_java_code(code), "sanity check");
0N/A assert(code != Bytecodes::_breakpoint, "sanity check");
0N/A
0N/A // length of bytecode (mnemonic + operands)
0N/A address bcp = bs.bcp();
1485N/A int len = bs.instruction_size();
0N/A assert(len > 0, "length must be > 0");
0N/A
0N/A // copy the bytecodes
0N/A *p = (unsigned char) (bs.is_wide()? Bytecodes::_wide : code);
0N/A if (len > 1) {
0N/A memcpy(p+1, bcp+1, len-1);
0N/A }
0N/A
0N/A // During linking the get/put and invoke instructions are rewritten
0N/A // with an index into the constant pool cache. The original constant
0N/A // pool index must be returned to caller. Rewrite the index.
0N/A if (is_rewritten && len >= 3) {
0N/A switch (code) {
0N/A case Bytecodes::_getstatic : // fall through
0N/A case Bytecodes::_putstatic : // fall through
0N/A case Bytecodes::_getfield : // fall through
0N/A case Bytecodes::_putfield : // fall through
0N/A case Bytecodes::_invokevirtual : // fall through
0N/A case Bytecodes::_invokespecial : // fall through
0N/A case Bytecodes::_invokestatic : // fall through
726N/A case Bytecodes::_invokedynamic : // fall through
0N/A case Bytecodes::_invokeinterface :
0N/A assert(len == 3 || (code == Bytecodes::_invokeinterface && len ==5),
0N/A "sanity check");
726N/A int cpci = Bytes::get_native_u2(bcp+1);
726N/A bool is_invokedynamic = (EnableInvokeDynamic && code == Bytecodes::_invokedynamic);
726N/A if (is_invokedynamic)
726N/A cpci = Bytes::get_native_u4(bcp+1);
0N/A // cache cannot be pre-fetched since some classes won't have it yet
0N/A ConstantPoolCacheEntry* entry =
726N/A mh->constants()->cache()->main_entry_at(cpci);
0N/A int i = entry->constant_pool_index();
0N/A assert(i < mh->constants()->length(), "sanity check");
0N/A Bytes::put_Java_u2((address)(p+1), (u2)i); // java byte ordering
726N/A if (is_invokedynamic) *(p+3) = *(p+4) = 0;
0N/A break;
0N/A }
0N/A }
0N/A
0N/A p += len;
0N/A }
0N/A}