Mercurial > hg > truffle
diff src/share/vm/prims/jvmtiClassFileReconstituter.cpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | be93aad57795 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/prims/jvmtiClassFileReconstituter.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,677 @@ +/* + * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ +# include "incls/_precompiled.incl" +# include "incls/_jvmtiClassFileReconstituter.cpp.incl" + +// FIXME: add Deprecated, LVT, LVTT attributes +// FIXME: fix Synthetic attribute +// FIXME: per Serguei, add error return handling for constantPoolOopDesc::copy_cpool_bytes() + + +// 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); + } + } +} + +// Write Code attribute +// JVMSpec| Code_attribute { +// JVMSpec| u2 attribute_name_index; +// JVMSpec| u4 attribute_length; +// JVMSpec| u2 max_stack; +// JVMSpec| u2 max_locals; +// JVMSpec| u4 code_length; +// JVMSpec| u1 code[code_length]; +// JVMSpec| u2 exception_table_length; +// JVMSpec| { u2 start_pc; +// JVMSpec| u2 end_pc; +// JVMSpec| u2 handler_pc; +// JVMSpec| u2 catch_type; +// JVMSpec| } exception_table[exception_table_length]; +// JVMSpec| u2 attributes_count; +// JVMSpec| attribute_info attributes[attributes_count]; +// JVMSpec| } +void JvmtiClassFileReconstituter::write_code_attribute(methodHandle method) { + constMethodHandle const_method(thread(), method->constMethod()); + u2 line_num_cnt = 0; + int stackmap_len = 0; + + // compute number and length of attributes -- FIXME: for now no LVT + int attr_count = 0; + int attr_size = 0; + if (const_method->has_linenumber_table()) { + line_num_cnt = line_number_table_entries(method); + if (line_num_cnt != 0) { + ++attr_count; + // Compute the complete size of the line number table attribute: + // LineNumberTable_attribute { + // u2 attribute_name_index; + // u4 attribute_length; + // u2 line_number_table_length; + // { u2 start_pc; + // u2 line_number; + // } line_number_table[line_number_table_length]; + // } + attr_size += 2 + 4 + 2 + line_num_cnt * (2 + 2); + } + } + if (method->has_stackmap_table()) { + stackmap_len = method->stackmap_data()->length(); + if (stackmap_len != 0) { + ++attr_count; + // Compute the size of the stack map table attribute (VM stores raw): + // StackMapTable_attribute { + // u2 attribute_name_index; + // u4 attribute_length; + // u2 number_of_entries; + // stack_map_frame_entries[number_of_entries]; + // } + attr_size += 2 + 4 + stackmap_len; + } + } + + typeArrayHandle exception_table(thread(), const_method->exception_table()); + int exception_table_length = exception_table->length(); + int exception_table_entries = exception_table_length / 4; + int code_size = const_method->code_size(); + int size = + 2+2+4 + // max_stack, max_locals, code_length + code_size + // code + 2 + // exception_table_length + (2+2+2+2) * exception_table_entries + // exception_table + 2 + // attributes_count + attr_size; // attributes + + write_attribute_name_index("Code"); + write_u4(size); + write_u2(method->max_stack()); + write_u2(method->max_locals()); + write_u4(code_size); + copy_bytecodes(method, (unsigned char*)writeable_address(code_size)); + write_u2(exception_table_entries); + for (int index = 0; index < exception_table_length; ) { + write_u2(exception_table->int_at(index++)); + write_u2(exception_table->int_at(index++)); + write_u2(exception_table->int_at(index++)); + write_u2(exception_table->int_at(index++)); + } + write_u2(attr_count); + if (line_num_cnt != 0) { + write_line_number_table_attribute(method, line_num_cnt); + } + if (stackmap_len != 0) { + write_stackmap_table_attribute(method, stackmap_len); + } + + // FIXME: write LVT attribute +} + +// Write Exceptions attribute +// JVMSpec| Exceptions_attribute { +// JVMSpec| u2 attribute_name_index; +// JVMSpec| u4 attribute_length; +// JVMSpec| u2 number_of_exceptions; +// JVMSpec| u2 exception_index_table[number_of_exceptions]; +// JVMSpec| } +void JvmtiClassFileReconstituter::write_exceptions_attribute(constMethodHandle const_method) { + CheckedExceptionElement* checked_exceptions = const_method->checked_exceptions_start(); + int checked_exceptions_length = const_method->checked_exceptions_length(); + int size = + 2 + // number_of_exceptions + 2 * checked_exceptions_length; // exception_index_table + + write_attribute_name_index("Exceptions"); + write_u4(size); + write_u2(checked_exceptions_length); + for (int index = 0; index < checked_exceptions_length; index++) { + write_u2(checked_exceptions[index].class_cp_index); + } +} + +// Write SourceFile attribute +// JVMSpec| SourceFile_attribute { +// JVMSpec| u2 attribute_name_index; +// JVMSpec| u4 attribute_length; +// JVMSpec| u2 sourcefile_index; +// JVMSpec| } +void JvmtiClassFileReconstituter::write_source_file_attribute() { + assert(ikh()->source_file_name() != NULL, "caller must check"); + + write_attribute_name_index("SourceFile"); + write_u4(2); // always length 2 + write_u2(symbol_to_cpool_index(ikh()->source_file_name())); +} + +// Write SourceDebugExtension attribute +// JSR45| SourceDebugExtension_attribute { +// JSR45| u2 attribute_name_index; +// JSR45| u4 attribute_length; +// JSR45| u2 sourcefile_index; +// JSR45| } +void JvmtiClassFileReconstituter::write_source_debug_extension_attribute() { + assert(ikh()->source_debug_extension() != NULL, "caller must check"); + + write_attribute_name_index("SourceDebugExtension"); + write_u4(2); // always length 2 + write_u2(symbol_to_cpool_index(ikh()->source_debug_extension())); +} + +// Write (generic) Signature attribute +// JVMSpec| Signature_attribute { +// JVMSpec| u2 attribute_name_index; +// JVMSpec| u4 attribute_length; +// JVMSpec| u2 signature_index; +// JVMSpec| } +void JvmtiClassFileReconstituter::write_signature_attribute(u2 generic_signature_index) { + write_attribute_name_index("Signature"); + write_u4(2); // always length 2 + write_u2(generic_signature_index); +} + +// Compute the number of entries in the InnerClasses attribute +u2 JvmtiClassFileReconstituter::inner_classes_attribute_length() { + typeArrayOop inner_class_list = ikh()->inner_classes(); + return (inner_class_list == NULL) ? 0 : inner_class_list->length(); +} + +// Write an annotation attribute. The VM stores them in raw form, so all we need +// to do is add the attrubute name and fill in the length. +// JSR202| *Annotations_attribute { +// JSR202| u2 attribute_name_index; +// JSR202| u4 attribute_length; +// JSR202| ... +// JSR202| } +void JvmtiClassFileReconstituter::write_annotations_attribute(const char* attr_name, + typeArrayHandle annos) { + u4 length = annos->length(); + write_attribute_name_index(attr_name); + write_u4(length); + memcpy(writeable_address(length), annos->byte_at_addr(0), length); +} + + +// Write InnerClasses attribute +// JVMSpec| InnerClasses_attribute { +// JVMSpec| u2 attribute_name_index; +// JVMSpec| u4 attribute_length; +// JVMSpec| u2 number_of_classes; +// JVMSpec| { u2 inner_class_info_index; +// JVMSpec| u2 outer_class_info_index; +// JVMSpec| u2 inner_name_index; +// JVMSpec| u2 inner_class_access_flags; +// JVMSpec| } classes[number_of_classes]; +// JVMSpec| } +void JvmtiClassFileReconstituter::write_inner_classes_attribute(int length) { + typeArrayOop inner_class_list = ikh()->inner_classes(); + guarantee(inner_class_list != NULL && inner_class_list->length() == length, + "caller must check"); + typeArrayHandle inner_class_list_h(thread(), inner_class_list); + assert (length % instanceKlass::inner_class_next_offset == 0, "just checking"); + u2 entry_count = length / instanceKlass::inner_class_next_offset; + u4 size = 2 + entry_count * (2+2+2+2); + + write_attribute_name_index("InnerClasses"); + write_u4(size); + write_u2(entry_count); + for (int i = 0; i < length; i += instanceKlass::inner_class_next_offset) { + write_u2(inner_class_list_h->ushort_at( + i + instanceKlass::inner_class_inner_class_info_offset)); + write_u2(inner_class_list_h->ushort_at( + i + instanceKlass::inner_class_outer_class_info_offset)); + write_u2(inner_class_list_h->ushort_at( + i + instanceKlass::inner_class_inner_name_offset)); + write_u2(inner_class_list_h->ushort_at( + i + instanceKlass::inner_class_access_flags_offset)); + } +} + +// Write Synthetic attribute +// JVMSpec| Synthetic_attribute { +// JVMSpec| u2 attribute_name_index; +// JVMSpec| u4 attribute_length; +// JVMSpec| } +void JvmtiClassFileReconstituter::write_synthetic_attribute() { + write_attribute_name_index("Synthetic"); + write_u4(0); //length always zero +} + +// Compute size of LineNumberTable +u2 JvmtiClassFileReconstituter::line_number_table_entries(methodHandle method) { + // The line number table is compressed so we don't know how big it is until decompressed. + // Decompression is really fast so we just do it twice. + u2 num_entries = 0; + CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); + while (stream.read_pair()) { + num_entries++; + } + return num_entries; +} + +// Write LineNumberTable attribute +// JVMSpec| LineNumberTable_attribute { +// JVMSpec| u2 attribute_name_index; +// JVMSpec| u4 attribute_length; +// JVMSpec| u2 line_number_table_length; +// JVMSpec| { u2 start_pc; +// JVMSpec| u2 line_number; +// JVMSpec| } line_number_table[line_number_table_length]; +// JVMSpec| } +void JvmtiClassFileReconstituter::write_line_number_table_attribute(methodHandle method, + u2 num_entries) { + + write_attribute_name_index("LineNumberTable"); + write_u4(2 + num_entries * (2 + 2)); + write_u2(num_entries); + + CompressedLineNumberReadStream stream(method->compressed_linenumber_table()); + while (stream.read_pair()) { + write_u2(stream.bci()); + write_u2(stream.line()); + } +} + +// Write stack map table attribute +// JSR-202| StackMapTable_attribute { +// JSR-202| u2 attribute_name_index; +// JSR-202| u4 attribute_length; +// JSR-202| u2 number_of_entries; +// JSR-202| stack_map_frame_entries[number_of_entries]; +// JSR-202| } +void JvmtiClassFileReconstituter::write_stackmap_table_attribute(methodHandle method, + int stackmap_len) { + + write_attribute_name_index("StackMapTable"); + write_u4(stackmap_len); + memcpy( + writeable_address(stackmap_len), + (void*)(method->stackmap_data()->byte_at_addr(0)), + stackmap_len); +} + +// Write one method_info structure +// JVMSpec| method_info { +// JVMSpec| u2 access_flags; +// JVMSpec| u2 name_index; +// JVMSpec| u2 descriptor_index; +// JVMSpec| u2 attributes_count; +// JVMSpec| attribute_info attributes[attributes_count]; +// JVMSpec| } +void JvmtiClassFileReconstituter::write_method_info(methodHandle method) { + AccessFlags access_flags = method->access_flags(); + constMethodHandle const_method(thread(), method->constMethod()); + u2 generic_signature_index = const_method->generic_signature_index(); + typeArrayHandle anno(thread(), method->annotations()); + typeArrayHandle param_anno(thread(), method->parameter_annotations()); + typeArrayHandle default_anno(thread(), method->annotation_default()); + + write_u2(access_flags.get_flags() & JVM_RECOGNIZED_METHOD_MODIFIERS); + write_u2(const_method->name_index()); + write_u2(const_method->signature_index()); + + // write attributes in the same order javac does, so we can test with byte for + // byte comparison + int attr_count = 0; + if (const_method->code_size() != 0) { + ++attr_count; // has Code attribute + } + if (const_method->has_checked_exceptions()) { + ++attr_count; // has Exceptions attribute + } + if (default_anno.not_null()) { + ++attr_count; // has AnnotationDefault attribute + } + // Deprecated attribute would go here + if (access_flags.is_synthetic()) { // FIXME + // ++attr_count; + } + if (generic_signature_index != 0) { + ++attr_count; + } + if (anno.not_null()) { + ++attr_count; // has RuntimeVisibleAnnotations attribute + } + if (param_anno.not_null()) { + ++attr_count; // has RuntimeVisibleParameterAnnotations attribute + } + + write_u2(attr_count); + if (const_method->code_size() > 0) { + write_code_attribute(method); + } + if (const_method->has_checked_exceptions()) { + write_exceptions_attribute(const_method); + } + if (default_anno.not_null()) { + write_annotations_attribute("AnnotationDefault", default_anno); + } + // Deprecated attribute would go here + 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); + } + if (param_anno.not_null()) { + write_annotations_attribute("RuntimeVisibleParameterAnnotations", param_anno); + } +} + +// Write the class attributes portion of ClassFile structure +// JVMSpec| u2 attributes_count; +// JVMSpec| attribute_info attributes[attributes_count]; +void JvmtiClassFileReconstituter::write_class_attributes() { + u2 inner_classes_length = inner_classes_attribute_length(); + symbolHandle generic_signature(thread(), ikh()->generic_signature()); + typeArrayHandle anno(thread(), ikh()->class_annotations()); + + int attr_count = 0; + if (generic_signature() != NULL) { + ++attr_count; + } + if (ikh()->source_file_name() != NULL) { + ++attr_count; + } + if (ikh()->source_debug_extension() != NULL) { + ++attr_count; + } + if (inner_classes_length > 0) { + ++attr_count; + } + if (anno.not_null()) { + ++attr_count; // has RuntimeVisibleAnnotations attribute + } + + write_u2(attr_count); + + if (generic_signature() != NULL) { + write_signature_attribute(symbol_to_cpool_index(generic_signature())); + } + if (ikh()->source_file_name() != NULL) { + write_source_file_attribute(); + } + if (ikh()->source_debug_extension() != NULL) { + write_source_debug_extension_attribute(); + } + if (inner_classes_length > 0) { + write_inner_classes_attribute(inner_classes_length); + } + if (anno.not_null()) { + write_annotations_attribute("RuntimeVisibleAnnotations", anno); + } +} + +// Write the method information portion of ClassFile structure +// JVMSpec| u2 methods_count; +// JVMSpec| method_info methods[methods_count]; +void JvmtiClassFileReconstituter::write_method_infos() { + HandleMark hm(thread()); + objArrayHandle methods(thread(), ikh()->methods()); + int num_methods = methods->length(); + + write_u2(num_methods); + if (JvmtiExport::can_maintain_original_method_order()) { + int index; + int original_index; + int* method_order = NEW_RESOURCE_ARRAY(int, num_methods); + + // invert the method order mapping + for (index = 0; index < num_methods; index++) { + original_index = ikh()->method_ordering()->int_at(index); + assert(original_index >= 0 && original_index < num_methods, + "invalid original method index"); + method_order[original_index] = index; + } + + // write in original order + for (original_index = 0; original_index < num_methods; original_index++) { + index = method_order[original_index]; + methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); + write_method_info(method); + } + } else { + // method order not preserved just dump the method infos + for (int index = 0; index < num_methods; index++) { + methodHandle method(thread(), (methodOop)(ikh()->methods()->obj_at(index))); + write_method_info(method); + } + } +} + +void JvmtiClassFileReconstituter::write_class_file_format() { + ReallocMark(); + + // JVMSpec| ClassFile { + // JVMSpec| u4 magic; + write_u4(0xCAFEBABE); + + // JVMSpec| u2 minor_version; + // JVMSpec| u2 major_version; + write_u2(ikh()->minor_version()); + u2 major = ikh()->major_version(); + write_u2(major); + + // JVMSpec| u2 constant_pool_count; + // JVMSpec| cp_info constant_pool[constant_pool_count-1]; + write_u2(cpool()->length()); + copy_cpool_bytes(writeable_address(cpool_size())); + + // JVMSpec| u2 access_flags; + write_u2(ikh()->access_flags().get_flags() & JVM_RECOGNIZED_CLASS_MODIFIERS); + + // JVMSpec| u2 this_class; + // JVMSpec| u2 super_class; + write_u2(class_symbol_to_cpool_index(ikh()->name())); + klassOop super_class = ikh()->super(); + write_u2(super_class == NULL? 0 : // zero for java.lang.Object + class_symbol_to_cpool_index(super_class->klass_part()->name())); + + // JVMSpec| u2 interfaces_count; + // JVMSpec| u2 interfaces[interfaces_count]; + objArrayHandle interfaces(thread(), ikh()->local_interfaces()); + int num_interfaces = interfaces->length(); + write_u2(num_interfaces); + for (int index = 0; index < num_interfaces; index++) { + HandleMark hm(thread()); + instanceKlassHandle iikh(thread(), klassOop(interfaces->obj_at(index))); + write_u2(class_symbol_to_cpool_index(iikh->name())); + } + + // JVMSpec| u2 fields_count; + // JVMSpec| field_info fields[fields_count]; + write_field_infos(); + + // JVMSpec| u2 methods_count; + // JVMSpec| method_info methods[methods_count]; + write_method_infos(); + + // JVMSpec| u2 attributes_count; + // JVMSpec| attribute_info attributes[attributes_count]; + // JVMSpec| } /* end ClassFile 8? + write_class_attributes(); +} + +address JvmtiClassFileReconstituter::writeable_address(size_t size) { + size_t used_size = _buffer_ptr - _buffer; + if (size + used_size >= _buffer_size) { + // compute the new buffer size: must be at least twice as big as before + // plus whatever new is being used; then convert to nice clean block boundary + size_t new_buffer_size = (size + _buffer_size*2 + 1) / initial_buffer_size + * initial_buffer_size; + + // VM goes belly-up if the memory isn't available, so cannot do OOM processing + _buffer = REALLOC_RESOURCE_ARRAY(u1, _buffer, _buffer_size, new_buffer_size); + _buffer_size = new_buffer_size; + _buffer_ptr = _buffer + used_size; + } + u1* ret_ptr = _buffer_ptr; + _buffer_ptr += size; + return ret_ptr; +} + +void JvmtiClassFileReconstituter::write_attribute_name_index(const char* name) { + unsigned int hash_ignored; + symbolOop sym = SymbolTable::lookup_only(name, (int)strlen(name), hash_ignored); + assert(sym != NULL, "attribute name symbol not found"); + u2 attr_name_index = symbol_to_cpool_index(sym); + assert(attr_name_index != 0, "attribute name symbol not in constant pool"); + write_u2(attr_name_index); +} + +void JvmtiClassFileReconstituter::write_u1(u1 x) { + *writeable_address(1) = x; +} + +void JvmtiClassFileReconstituter::write_u2(u2 x) { + Bytes::put_Java_u2(writeable_address(2), x); +} + +void JvmtiClassFileReconstituter::write_u4(u4 x) { + Bytes::put_Java_u4(writeable_address(4), x); +} + +void JvmtiClassFileReconstituter::write_u8(u8 x) { + Bytes::put_Java_u8(writeable_address(8), x); +} + +void JvmtiClassFileReconstituter::copy_bytecodes(methodHandle mh, + unsigned char* bytecodes) { + // use a BytecodeStream to iterate over the bytecodes. JVM/fast bytecodes + // and the breakpoint bytecode are converted to their original bytecodes. + + BytecodeStream bs(mh); + + unsigned char* p = bytecodes; + Bytecodes::Code code; + bool is_rewritten = instanceKlass::cast(mh->method_holder())->is_rewritten(); + + while ((code = bs.next()) >= 0) { + assert(Bytecodes::is_java_code(code), "sanity check"); + assert(code != Bytecodes::_breakpoint, "sanity check"); + + // length of bytecode (mnemonic + operands) + address bcp = bs.bcp(); + int len = bs.next_bcp() - bcp; + assert(len > 0, "length must be > 0"); + + // copy the bytecodes + *p = (unsigned char) (bs.is_wide()? Bytecodes::_wide : code); + if (len > 1) { + memcpy(p+1, bcp+1, len-1); + } + + // During linking the get/put and invoke instructions are rewritten + // with an index into the constant pool cache. The original constant + // pool index must be returned to caller. Rewrite the index. + if (is_rewritten && len >= 3) { + switch (code) { + case Bytecodes::_getstatic : // fall through + case Bytecodes::_putstatic : // fall through + case Bytecodes::_getfield : // fall through + case Bytecodes::_putfield : // fall through + case Bytecodes::_invokevirtual : // fall through + case Bytecodes::_invokespecial : // fall through + case Bytecodes::_invokestatic : // fall through + case Bytecodes::_invokeinterface : + assert(len == 3 || (code == Bytecodes::_invokeinterface && len ==5), + "sanity check"); + // cache cannot be pre-fetched since some classes won't have it yet + ConstantPoolCacheEntry* entry = + mh->constants()->cache()->entry_at(Bytes::get_native_u2(bcp+1)); + int i = entry->constant_pool_index(); + assert(i < mh->constants()->length(), "sanity check"); + Bytes::put_Java_u2((address)(p+1), (u2)i); // java byte ordering + break; + } + } + + p += len; + } +}