duke@435: /*
acorn@4497:  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #include "precompiled.hpp"
coleenp@4037: #include "interpreter/interpreter.hpp"
coleenp@4037: #include "memory/gcLocker.hpp"
acorn@4497: #include "memory/heapInspection.hpp"
coleenp@4037: #include "memory/metadataFactory.hpp"
coleenp@4037: #include "oops/constMethod.hpp"
coleenp@4037: #include "oops/method.hpp"
duke@435: 
duke@435: // Static initialization
coleenp@4037: const u2 ConstMethod::MAX_IDNUM   = 0xFFFE;
coleenp@4037: const u2 ConstMethod::UNSET_IDNUM = 0xFFFF;
coleenp@4037: 
coleenp@4037: ConstMethod* ConstMethod::allocate(ClassLoaderData* loader_data,
kamg@4245:                                    int byte_code_size,
coleenp@4572:                                    InlineTableSizes* sizes,
kamg@4245:                                    MethodType method_type,
kamg@4245:                                    TRAPS) {
coleenp@4572:   int size = ConstMethod::size(byte_code_size, sizes);
iklam@5208:   return new (loader_data, size, true, MetaspaceObj::ConstMethodType, THREAD) ConstMethod(
coleenp@4572:       byte_code_size, sizes, method_type, size);
coleenp@4037: }
coleenp@4037: 
coleenp@4037: ConstMethod::ConstMethod(int byte_code_size,
coleenp@4572:                          InlineTableSizes* sizes,
kamg@4245:                          MethodType method_type,
kamg@4245:                          int size) {
coleenp@4037: 
coleenp@4037:   No_Safepoint_Verifier no_safepoint;
coleenp@4037:   init_fingerprint();
coleenp@4037:   set_constants(NULL);
coleenp@4037:   set_stackmap_data(NULL);
coleenp@4037:   set_code_size(byte_code_size);
coleenp@4037:   set_constMethod_size(size);
coleenp@4715:   set_inlined_tables_length(sizes); // sets _flags
kamg@4245:   set_method_type(method_type);
coleenp@4037:   assert(this->size() == size, "wrong size for object");
coleenp@4712:   set_name_index(0);
coleenp@4712:   set_signature_index(0);
coleenp@4712:   set_constants(NULL);
coleenp@4712:   set_max_stack(0);
coleenp@4712:   set_max_locals(0);
coleenp@4712:   set_method_idnum(0);
coleenp@4715:   set_size_of_parameters(0);
coleenp@4037: }
coleenp@4037: 
coleenp@4719: // Accessor that copies to metadata.
coleenp@4719: void ConstMethod::copy_stackmap_data(ClassLoaderData* loader_data,
coleenp@4719:                                      u1* sd, int length, TRAPS) {
coleenp@4719:   _stackmap_data = MetadataFactory::new_array<u1>(loader_data, length, CHECK);
coleenp@4719:   memcpy((void*)_stackmap_data->adr_at(0), (void*)sd, length);
coleenp@4719: }
coleenp@4037: 
coleenp@4037: // Deallocate metadata fields associated with ConstMethod*
coleenp@4037: void ConstMethod::deallocate_contents(ClassLoaderData* loader_data) {
coleenp@4037:   if (stackmap_data() != NULL) {
coleenp@4037:     MetadataFactory::free_array<u1>(loader_data, stackmap_data());
coleenp@4037:   }
coleenp@4037:   set_stackmap_data(NULL);
coleenp@4572: 
coleenp@4572:   // deallocate annotation arrays
coleenp@4572:   if (has_method_annotations())
coleenp@4572:     MetadataFactory::free_array<u1>(loader_data, method_annotations());
coleenp@4572:   if (has_parameter_annotations())
coleenp@4572:     MetadataFactory::free_array<u1>(loader_data, parameter_annotations());
coleenp@4572:   if (has_type_annotations())
coleenp@4572:     MetadataFactory::free_array<u1>(loader_data, type_annotations());
coleenp@4572:   if (has_default_annotations())
coleenp@4572:     MetadataFactory::free_array<u1>(loader_data, default_annotations());
coleenp@4037: }
duke@435: 
duke@435: // How big must this constMethodObject be?
duke@435: 
coleenp@4037: int ConstMethod::size(int code_size,
coleenp@4572:                       InlineTableSizes* sizes) {
duke@435:   int extra_bytes = code_size;
coleenp@4572:   if (sizes->compressed_linenumber_size() > 0) {
coleenp@4572:     extra_bytes += sizes->compressed_linenumber_size();
duke@435:   }
coleenp@4572:   if (sizes->checked_exceptions_length() > 0) {
duke@435:     extra_bytes += sizeof(u2);
coleenp@4572:     extra_bytes += sizes->checked_exceptions_length() * sizeof(CheckedExceptionElement);
duke@435:   }
coleenp@4572:   if (sizes->localvariable_table_length() > 0) {
duke@435:     extra_bytes += sizeof(u2);
duke@435:     extra_bytes +=
coleenp@4572:               sizes->localvariable_table_length() * sizeof(LocalVariableTableElement);
duke@435:   }
coleenp@4572:   if (sizes->exception_table_length() > 0) {
jiangli@3917:     extra_bytes += sizeof(u2);
coleenp@4572:     extra_bytes += sizes->exception_table_length() * sizeof(ExceptionTableElement);
jiangli@3917:   }
coleenp@4572:   if (sizes->generic_signature_index() != 0) {
jiangli@4302:     extra_bytes += sizeof(u2);
jiangli@4302:   }
coleenp@4572:   if (sizes->method_parameters_length() > 0) {
coleenp@4398:     extra_bytes += sizeof(u2);
coleenp@4572:     extra_bytes += sizes->method_parameters_length() * sizeof(MethodParametersElement);
coleenp@4398:   }
coleenp@4572: 
coleenp@4572:   // Align sizes up to a word.
coleenp@4572:   extra_bytes = align_size_up(extra_bytes, BytesPerWord);
coleenp@4572: 
coleenp@4572:   // One pointer per annotation array
coleenp@4572:   if (sizes->method_annotations_length() > 0) {
coleenp@4572:     extra_bytes += sizeof(AnnotationArray*);
coleenp@4572:   }
coleenp@4572:   if (sizes->parameter_annotations_length() > 0) {
coleenp@4572:     extra_bytes += sizeof(AnnotationArray*);
coleenp@4572:   }
coleenp@4572:   if (sizes->type_annotations_length() > 0) {
coleenp@4572:     extra_bytes += sizeof(AnnotationArray*);
coleenp@4572:   }
coleenp@4572:   if (sizes->default_annotations_length() > 0) {
coleenp@4572:     extra_bytes += sizeof(AnnotationArray*);
coleenp@4572:   }
coleenp@4572: 
duke@435:   int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord;
coleenp@4572:   assert(extra_words == extra_bytes/BytesPerWord, "should already be aligned");
duke@435:   return align_object_size(header_size() + extra_words);
duke@435: }
duke@435: 
coleenp@4037: Method* ConstMethod::method() const {
coleenp@4251:     return _constants->pool_holder()->method_with_idnum(_method_idnum);
jiangli@3826:   }
duke@435: 
duke@435: // linenumber table - note that length is unknown until decompression,
duke@435: // see class CompressedLineNumberReadStream.
duke@435: 
coleenp@4037: u_char* ConstMethod::compressed_linenumber_table() const {
duke@435:   // Located immediately following the bytecodes.
duke@435:   assert(has_linenumber_table(), "called only if table is present");
duke@435:   return code_end();
duke@435: }
duke@435: 
coleenp@4572: // Last short in ConstMethod* before annotations
coleenp@4572: u2* ConstMethod::last_u2_element() const {
coleenp@4572:   int offset = 0;
coleenp@4572:   if (has_method_annotations()) offset++;
coleenp@4572:   if (has_parameter_annotations()) offset++;
coleenp@4572:   if (has_type_annotations()) offset++;
coleenp@4572:   if (has_default_annotations()) offset++;
coleenp@4572:   return (u2*)((AnnotationArray**)constMethod_end() - offset) - 1;
coleenp@4572: }
coleenp@4572: 
jiangli@4302: u2* ConstMethod::generic_signature_index_addr() const {
jiangli@4302:   // Located at the end of the constMethod.
jiangli@4302:   assert(has_generic_signature(), "called only if generic signature exists");
jiangli@4302:   return last_u2_element();
jiangli@4302: }
jiangli@4302: 
coleenp@4572: u2* ConstMethod::method_parameters_length_addr() const {
coleenp@4572:   assert(has_method_parameters(), "called only if table is present");
coleenp@4572:   return has_generic_signature() ? (last_u2_element() - 1) :
coleenp@4572:                                     last_u2_element();
coleenp@4572: }
coleenp@4572: 
coleenp@4037: u2* ConstMethod::checked_exceptions_length_addr() const {
jiangli@4302:   // Located immediately before the generic signature index.
duke@435:   assert(has_checked_exceptions(), "called only if table is present");
coleenp@4398:   if(has_method_parameters()) {
coleenp@4398:     // If method parameters present, locate immediately before them.
coleenp@4398:     return (u2*)method_parameters_start() - 1;
coleenp@4398:   } else {
coleenp@4398:     // Else, the exception table is at the end of the constMethod.
coleenp@4398:     return has_generic_signature() ? (last_u2_element() - 1) :
coleenp@4398:                                      last_u2_element();
coleenp@4398:   }
coleenp@4398: }
coleenp@4398: 
coleenp@4037: u2* ConstMethod::exception_table_length_addr() const {
jiangli@3917:   assert(has_exception_handler(), "called only if table is present");
duke@435:   if (has_checked_exceptions()) {
duke@435:     // If checked_exception present, locate immediately before them.
duke@435:     return (u2*) checked_exceptions_start() - 1;
duke@435:   } else {
coleenp@4398:     if(has_method_parameters()) {
coleenp@4398:       // If method parameters present, locate immediately before them.
coleenp@4398:       return (u2*)method_parameters_start() - 1;
coleenp@4398:     } else {
coleenp@4398:       // Else, the exception table is at the end of the constMethod.
coleenp@4572:       return has_generic_signature() ? (last_u2_element() - 1) :
coleenp@4572:                                         last_u2_element();
coleenp@4572:     }
coleenp@4398:   }
duke@435: }
duke@435: 
coleenp@4037: u2* ConstMethod::localvariable_table_length_addr() const {
jiangli@3917:   assert(has_localvariable_table(), "called only if table is present");
jiangli@3917:   if (has_exception_handler()) {
jiangli@3917:     // If exception_table present, locate immediately before them.
jiangli@3917:     return (u2*) exception_table_start() - 1;
jiangli@3917:   } else {
jiangli@3917:     if (has_checked_exceptions()) {
jiangli@3917:       // If checked_exception present, locate immediately before them.
jiangli@3917:       return (u2*) checked_exceptions_start() - 1;
jiangli@3917:     } else {
coleenp@4398:       if(has_method_parameters()) {
coleenp@4398:         // If method parameters present, locate immediately before them.
coleenp@4398:         return (u2*)method_parameters_start() - 1;
coleenp@4398:       } else {
coleenp@4398:         // Else, the exception table is at the end of the constMethod.
jiangli@4302:       return has_generic_signature() ? (last_u2_element() - 1) :
jiangli@4302:                                         last_u2_element();
coleenp@4572:       }
jiangli@3917:     }
jiangli@3917:   }
jiangli@3917: }
jiangli@3917: 
duke@435: // Update the flags to indicate the presence of these optional fields.
coleenp@4572: void ConstMethod::set_inlined_tables_length(InlineTableSizes* sizes) {
coleenp@4572:   _flags = 0;
coleenp@4572:   if (sizes->compressed_linenumber_size() > 0)
duke@435:     _flags |= _has_linenumber_table;
coleenp@4572:   if (sizes->generic_signature_index() != 0)
jiangli@4302:     _flags |= _has_generic_signature;
coleenp@4572:   if (sizes->method_parameters_length() > 0)
coleenp@4398:     _flags |= _has_method_parameters;
coleenp@4572:   if (sizes->checked_exceptions_length() > 0)
coleenp@4398:     _flags |= _has_checked_exceptions;
coleenp@4572:   if (sizes->exception_table_length() > 0)
coleenp@4398:     _flags |= _has_exception_table;
coleenp@4572:   if (sizes->localvariable_table_length() > 0)
coleenp@4398:     _flags |= _has_localvariable_table;
coleenp@4398: 
coleenp@4572:   // annotations, they are all pointer sized embedded objects so don't have
coleenp@4572:   // a length embedded also.
coleenp@4572:   if (sizes->method_annotations_length() > 0)
coleenp@4572:     _flags |= _has_method_annotations;
coleenp@4572:   if (sizes->parameter_annotations_length() > 0)
coleenp@4572:     _flags |= _has_parameter_annotations;
coleenp@4572:   if (sizes->type_annotations_length() > 0)
coleenp@4572:     _flags |= _has_type_annotations;
coleenp@4572:   if (sizes->default_annotations_length() > 0)
coleenp@4572:     _flags |= _has_default_annotations;
coleenp@4572: 
coleenp@4398:   // This code is extremely brittle and should possibly be revised.
coleenp@4398:   // The *_length_addr functions walk backwards through the
coleenp@4398:   // constMethod data, using each of the length indexes ahead of them,
coleenp@4398:   // as well as the flags variable.  Therefore, the indexes must be
coleenp@4398:   // initialized in reverse order, or else they will compute the wrong
coleenp@4398:   // offsets.  Moving the initialization of _flags into a separate
coleenp@4398:   // block solves *half* of the problem, but the following part will
coleenp@4398:   // still break if the order is not exactly right.
coleenp@4398:   //
coleenp@4398:   // Also, the servicability agent needs to be informed anytime
coleenp@4398:   // anything is added here.  It might be advisable to have some sort
coleenp@4398:   // of indication of this inline.
coleenp@4572:   if (sizes->generic_signature_index() != 0)
coleenp@4572:     *(generic_signature_index_addr()) = sizes->generic_signature_index();
coleenp@4398:   // New data should probably go here.
coleenp@4572:   if (sizes->method_parameters_length() > 0)
coleenp@4572:     *(method_parameters_length_addr()) = sizes->method_parameters_length();
coleenp@4572:   if (sizes->checked_exceptions_length() > 0)
coleenp@4572:     *(checked_exceptions_length_addr()) = sizes->checked_exceptions_length();
coleenp@4572:   if (sizes->exception_table_length() > 0)
coleenp@4572:     *(exception_table_length_addr()) = sizes->exception_table_length();
coleenp@4572:   if (sizes->localvariable_table_length() > 0)
coleenp@4572:     *(localvariable_table_length_addr()) = sizes->localvariable_table_length();
coleenp@4398: }
coleenp@4398: 
coleenp@4398: int ConstMethod::method_parameters_length() const {
coleenp@4398:   return has_method_parameters() ? *(method_parameters_length_addr()) : 0;
coleenp@4398: }
coleenp@4398: 
coleenp@4398: MethodParametersElement* ConstMethod::method_parameters_start() const {
coleenp@4398:   u2* addr = method_parameters_length_addr();
coleenp@4398:   u2 length = *addr;
coleenp@4398:   assert(length > 0, "should only be called if table is present");
coleenp@4398:   addr -= length * sizeof(MethodParametersElement) / sizeof(u2);
coleenp@4398:   return (MethodParametersElement*) addr;
duke@435: }
duke@435: 
duke@435: 
coleenp@4037: int ConstMethod::checked_exceptions_length() const {
duke@435:   return has_checked_exceptions() ? *(checked_exceptions_length_addr()) : 0;
duke@435: }
duke@435: 
duke@435: 
coleenp@4037: CheckedExceptionElement* ConstMethod::checked_exceptions_start() const {
duke@435:   u2* addr = checked_exceptions_length_addr();
duke@435:   u2 length = *addr;
duke@435:   assert(length > 0, "should only be called if table is present");
duke@435:   addr -= length * sizeof(CheckedExceptionElement) / sizeof(u2);
duke@435:   return (CheckedExceptionElement*) addr;
duke@435: }
duke@435: 
duke@435: 
coleenp@4037: int ConstMethod::localvariable_table_length() const {
duke@435:   return has_localvariable_table() ? *(localvariable_table_length_addr()) : 0;
duke@435: }
duke@435: 
duke@435: 
coleenp@4037: LocalVariableTableElement* ConstMethod::localvariable_table_start() const {
duke@435:   u2* addr = localvariable_table_length_addr();
duke@435:   u2 length = *addr;
duke@435:   assert(length > 0, "should only be called if table is present");
duke@435:   addr -= length * sizeof(LocalVariableTableElement) / sizeof(u2);
duke@435:   return (LocalVariableTableElement*) addr;
duke@435: }
jiangli@3917: 
coleenp@4037: int ConstMethod::exception_table_length() const {
jiangli@3917:   return has_exception_handler() ? *(exception_table_length_addr()) : 0;
jiangli@3917: }
jiangli@3917: 
coleenp@4037: ExceptionTableElement* ConstMethod::exception_table_start() const {
jiangli@3917:   u2* addr = exception_table_length_addr();
jiangli@3917:   u2 length = *addr;
jiangli@3917:   assert(length > 0, "should only be called if table is present");
jiangli@3917:   addr -= length * sizeof(ExceptionTableElement) / sizeof(u2);
jiangli@3917:   return (ExceptionTableElement*)addr;
jiangli@3917: }
coleenp@4037: 
coleenp@4572: AnnotationArray** ConstMethod::method_annotations_addr() const {
coleenp@4572:   assert(has_method_annotations(), "should only be called if method annotations are present");
coleenp@4572:   return (AnnotationArray**)constMethod_end() - 1;
coleenp@4572: }
coleenp@4572: 
coleenp@4572: AnnotationArray** ConstMethod::parameter_annotations_addr() const {
coleenp@4572:   assert(has_parameter_annotations(), "should only be called if method parameter annotations are present");
coleenp@4572:   int offset = 1;
coleenp@4572:   if (has_method_annotations()) offset++;
coleenp@4572:   return (AnnotationArray**)constMethod_end() - offset;
coleenp@4572: }
coleenp@4572: 
coleenp@4572: AnnotationArray** ConstMethod::type_annotations_addr() const {
coleenp@4572:   assert(has_type_annotations(), "should only be called if method type annotations are present");
coleenp@4572:   int offset = 1;
coleenp@4572:   if (has_method_annotations()) offset++;
coleenp@4572:   if (has_parameter_annotations()) offset++;
coleenp@4572:   return (AnnotationArray**)constMethod_end() - offset;
coleenp@4572: }
coleenp@4572: 
coleenp@4572: AnnotationArray** ConstMethod::default_annotations_addr() const {
coleenp@4572:   assert(has_default_annotations(), "should only be called if method default annotations are present");
coleenp@4572:   int offset = 1;
coleenp@4572:   if (has_method_annotations()) offset++;
coleenp@4572:   if (has_parameter_annotations()) offset++;
coleenp@4572:   if (has_type_annotations()) offset++;
coleenp@4572:   return (AnnotationArray**)constMethod_end() - offset;
coleenp@4572: }
coleenp@4037: 
coleenp@4837: // copy annotations from 'cm' to 'this'
coleenp@4837: void ConstMethod::copy_annotations_from(ConstMethod* cm) {
coleenp@4837:   if (cm->has_method_annotations()) {
coleenp@4837:     assert(has_method_annotations(), "should be allocated already");
coleenp@4837:     set_method_annotations(cm->method_annotations());
coleenp@4837:   }
coleenp@4837:   if (cm->has_parameter_annotations()) {
coleenp@4837:     assert(has_parameter_annotations(), "should be allocated already");
coleenp@4837:     set_parameter_annotations(cm->parameter_annotations());
coleenp@4837:   }
coleenp@4837:   if (cm->has_type_annotations()) {
coleenp@4837:     assert(has_type_annotations(), "should be allocated already");
coleenp@4837:     set_type_annotations(cm->type_annotations());
coleenp@4837:   }
coleenp@4837:   if (cm->has_default_annotations()) {
coleenp@4837:     assert(has_default_annotations(), "should be allocated already");
coleenp@4837:     set_default_annotations(cm->default_annotations());
coleenp@4837:   }
coleenp@4837: }
coleenp@4837: 
coleenp@4037: // Printing
coleenp@4037: 
coleenp@4037: void ConstMethod::print_on(outputStream* st) const {
coleenp@4037:   ResourceMark rm;
coleenp@4037:   assert(is_constMethod(), "must be constMethod");
coleenp@4037:   st->print_cr(internal_name());
coleenp@4037:   st->print(" - method:       " INTPTR_FORMAT " ", (address)method());
coleenp@4037:   method()->print_value_on(st); st->cr();
coleenp@4037:   if (has_stackmap_table()) {
coleenp@4037:     st->print(" - stackmap data:       ");
coleenp@4037:     stackmap_data()->print_value_on(st);
coleenp@4037:     st->cr();
coleenp@4037:   }
coleenp@4037: }
coleenp@4037: 
coleenp@4037: // Short version of printing ConstMethod* - just print the name of the
coleenp@4037: // method it belongs to.
coleenp@4037: void ConstMethod::print_value_on(outputStream* st) const {
coleenp@4037:   assert(is_constMethod(), "must be constMethod");
coleenp@4037:   st->print(" const part of method " );
coleenp@4037:   method()->print_value_on(st);
coleenp@4037: }
coleenp@4037: 
acorn@4497: #if INCLUDE_SERVICES
acorn@4497: // Size Statistics
acorn@4497: void ConstMethod::collect_statistics(KlassSizeStats *sz) const {
acorn@4497:   int n1, n2, n3;
acorn@4497:   sz->_const_method_bytes += (n1 = sz->count(this));
acorn@4497:   sz->_bytecode_bytes     += (n2 = code_size());
acorn@4497:   sz->_stackmap_bytes     += (n3 = sz->count_array(stackmap_data()));
acorn@4497: 
coleenp@4572:   // Count method annotations
coleenp@4572:   int a1 = 0, a2 = 0, a3 = 0, a4 = 0;
coleenp@4572:   if (has_method_annotations()) {
coleenp@4572:     sz->_methods_annotations_bytes += (a1 = sz->count_array(method_annotations()));
coleenp@4572:   }
coleenp@4572:   if (has_parameter_annotations()) {
coleenp@4572:     sz->_methods_parameter_annotations_bytes += (a2 = sz->count_array(parameter_annotations()));
coleenp@4572:   }
coleenp@4572:   if (has_type_annotations()) {
coleenp@4572:     sz->_methods_type_annotations_bytes += (a3 = sz->count_array(type_annotations()));
coleenp@4572:   }
coleenp@4572:   if (has_default_annotations()) {
coleenp@4572:     sz->_methods_default_annotations_bytes += (a4 = sz->count_array(default_annotations()));
coleenp@4572:   }
coleenp@4572: 
coleenp@4572:   int size_annotations = a1 + a2 + a3 + a4;
coleenp@4572: 
coleenp@4572:   sz->_method_all_bytes += n1 + n3 + size_annotations; // note: n2 is part of n3
coleenp@4572:   sz->_ro_bytes += n1 + n3 + size_annotations;
acorn@4497: }
acorn@4497: #endif // INCLUDE_SERVICES
coleenp@4037: 
coleenp@4037: // Verification
coleenp@4037: 
coleenp@4037: void ConstMethod::verify_on(outputStream* st) {
coleenp@4037:   guarantee(is_constMethod(), "object must be constMethod");
coleenp@4037: 
coleenp@4037:   // Verification can occur during oop construction before the method or
coleenp@4037:   // other fields have been initialized.
coleenp@4037:   guarantee(method()->is_method(), "should be method");
coleenp@4037: 
coleenp@4572:   address m_end = (address)((intptr_t) this + size());
coleenp@4037:   address compressed_table_start = code_end();
coleenp@4037:   guarantee(compressed_table_start <= m_end, "invalid method layout");
coleenp@4037:   address compressed_table_end = compressed_table_start;
coleenp@4037:   // Verify line number table
coleenp@4037:   if (has_linenumber_table()) {
coleenp@4037:     CompressedLineNumberReadStream stream(compressed_linenumber_table());
coleenp@4037:     while (stream.read_pair()) {
coleenp@4037:       guarantee(stream.bci() >= 0 && stream.bci() <= code_size(), "invalid bci in line number table");
coleenp@4037:     }
coleenp@4037:     compressed_table_end += stream.position();
coleenp@4037:   }
coleenp@4037:   guarantee(compressed_table_end <= m_end, "invalid method layout");
coleenp@4037:   // Verify checked exceptions, exception table and local variable tables
coleenp@4398:   if (has_method_parameters()) {
coleenp@4398:     u2* addr = method_parameters_length_addr();
coleenp@4398:     guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout");
coleenp@4398:   }
coleenp@4037:   if (has_checked_exceptions()) {
coleenp@4037:     u2* addr = checked_exceptions_length_addr();
coleenp@4037:     guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout");
coleenp@4037:   }
coleenp@4037:   if (has_exception_handler()) {
coleenp@4037:     u2* addr = exception_table_length_addr();
coleenp@4037:      guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout");
coleenp@4037:   }
coleenp@4037:   if (has_localvariable_table()) {
coleenp@4037:     u2* addr = localvariable_table_length_addr();
coleenp@4037:     guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout");
coleenp@4037:   }
coleenp@4037:   // Check compressed_table_end relative to uncompressed_table_start
coleenp@4037:   u2* uncompressed_table_start;
coleenp@4037:   if (has_localvariable_table()) {
coleenp@4037:     uncompressed_table_start = (u2*) localvariable_table_start();
coleenp@4037:   } else if (has_exception_handler()) {
coleenp@4037:     uncompressed_table_start = (u2*) exception_table_start();
coleenp@4037:   } else if (has_checked_exceptions()) {
coleenp@4037:       uncompressed_table_start = (u2*) checked_exceptions_start();
coleenp@4398:   } else if (has_method_parameters()) {
coleenp@4398:       uncompressed_table_start = (u2*) method_parameters_start();
coleenp@4037:   } else {
coleenp@4037:       uncompressed_table_start = (u2*) m_end;
coleenp@4037:   }
coleenp@4037:   int gap = (intptr_t) uncompressed_table_start - (intptr_t) compressed_table_end;
coleenp@4037:   int max_gap = align_object_size(1)*BytesPerWord;
coleenp@4037:   guarantee(gap >= 0 && gap < max_gap, "invalid method layout");
coleenp@4037: }