/* * Copyright (c) 1997, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP #define SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP #include "classfile/classFileStream.hpp" #include "memory/resourceArea.hpp" #include "oops/oop.inline.hpp" #include "oops/typeArrayOop.hpp" #include "runtime/handles.inline.hpp" #include "utilities/accessFlags.hpp" class TempNewSymbol; // Parser for for .class files // // The bytes describing the class file structure is read from a Stream object class ClassFileParser VALUE_OBJ_CLASS_SPEC { private: bool _need_verify; bool _relax_verify; u2 _major_version; u2 _minor_version; Symbol* _class_name; KlassHandle _host_klass; GrowableArray* _cp_patches; // overrides for CP entries bool _has_finalizer; bool _has_empty_finalizer; bool _has_vanilla_constructor; int _max_bootstrap_specifier_index; enum { fixed_buffer_size = 128 }; u_char linenumbertable_buffer[fixed_buffer_size]; ClassFileStream* _stream; // Actual input stream enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names // Accessors ClassFileStream* stream() { return _stream; } void set_stream(ClassFileStream* st) { _stream = st; } // Constant pool parsing void parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS); constantPoolHandle parse_constant_pool(TRAPS); // Interface parsing objArrayHandle parse_interfaces(constantPoolHandle cp, int length, Handle class_loader, Handle protection_domain, Symbol* class_name, TRAPS); // Field parsing void parse_field_attributes(constantPoolHandle cp, u2 attributes_count, bool is_static, u2 signature_index, u2* constantvalue_index_addr, bool* is_synthetic_addr, u2* generic_signature_index_addr, typeArrayHandle* field_annotations, TRAPS); typeArrayHandle parse_fields(constantPoolHandle cp, bool is_interface, struct FieldAllocationCount *fac, objArrayHandle* fields_annotations, TRAPS); // Method parsing methodHandle parse_method(constantPoolHandle cp, bool is_interface, AccessFlags* promoted_flags, typeArrayHandle* method_annotations, typeArrayHandle* method_parameter_annotations, typeArrayHandle* method_default_annotations, TRAPS); objArrayHandle parse_methods (constantPoolHandle cp, bool is_interface, AccessFlags* promoted_flags, bool* has_final_method, objArrayOop* methods_annotations_oop, objArrayOop* methods_parameter_annotations_oop, objArrayOop* methods_default_annotations_oop, TRAPS); typeArrayHandle sort_methods (objArrayHandle methods, objArrayHandle methods_annotations, objArrayHandle methods_parameter_annotations, objArrayHandle methods_default_annotations, TRAPS); typeArrayHandle parse_exception_table(u4 code_length, u4 exception_table_length, constantPoolHandle cp, TRAPS); void parse_linenumber_table( u4 code_attribute_length, u4 code_length, CompressedLineNumberWriteStream** write_stream, TRAPS); u2* parse_localvariable_table(u4 code_length, u2 max_locals, u4 code_attribute_length, constantPoolHandle cp, u2* localvariable_table_length, bool isLVTT, TRAPS); u2* parse_checked_exceptions(u2* checked_exceptions_length, u4 method_attribute_length, constantPoolHandle cp, TRAPS); void parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS); typeArrayOop parse_stackmap_table(u4 code_attribute_length, TRAPS); // Classfile attribute parsing void parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS); void parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, instanceKlassHandle k, int length, TRAPS); u2 parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS); void parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS); void parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS); void parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS); void parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp, instanceKlassHandle k, u4 attribute_length, TRAPS); // Annotations handling typeArrayHandle assemble_annotations(u1* runtime_visible_annotations, int runtime_visible_annotations_length, u1* runtime_invisible_annotations, int runtime_invisible_annotations_length, TRAPS); // Final setup unsigned int compute_oop_map_count(instanceKlassHandle super, unsigned int nonstatic_oop_count, int first_nonstatic_oop_offset); void fill_oop_maps(instanceKlassHandle k, unsigned int nonstatic_oop_map_count, int* nonstatic_oop_offsets, unsigned int* nonstatic_oop_counts); void set_precomputed_flags(instanceKlassHandle k); objArrayHandle compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS); // Special handling for certain classes. // Add the "discovered" field to java.lang.ref.Reference if // it does not exist. void java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS); // Adjust the field allocation counts for java.lang.Class to add // fake fields. void java_lang_Class_fix_pre(int* nonstatic_field_size, FieldAllocationCount *fac_ptr); // Adjust the next_nonstatic_oop_offset to place the fake fields // before any Java fields. void java_lang_Class_fix_post(int* next_nonstatic_oop_offset); // Adjust the field allocation counts for java.lang.invoke.MethodHandle to add // a fake address (void*) field. void java_lang_invoke_MethodHandle_fix_pre(constantPoolHandle cp, typeArrayHandle fields, FieldAllocationCount *fac_ptr, TRAPS); // Format checker methods void classfile_parse_error(const char* msg, TRAPS); void classfile_parse_error(const char* msg, int index, TRAPS); void classfile_parse_error(const char* msg, const char *name, TRAPS); void classfile_parse_error(const char* msg, int index, const char *name, TRAPS); inline void guarantee_property(bool b, const char* msg, TRAPS) { if (!b) { classfile_parse_error(msg, CHECK); } } inline void assert_property(bool b, const char* msg, TRAPS) { #ifdef ASSERT if (!b) { fatal(msg); } #endif } inline void check_property(bool property, const char* msg, int index, TRAPS) { if (_need_verify) { guarantee_property(property, msg, index, CHECK); } else { assert_property(property, msg, CHECK); } } inline void check_property(bool property, const char* msg, TRAPS) { if (_need_verify) { guarantee_property(property, msg, CHECK); } else { assert_property(property, msg, CHECK); } } inline void guarantee_property(bool b, const char* msg, int index, TRAPS) { if (!b) { classfile_parse_error(msg, index, CHECK); } } inline void guarantee_property(bool b, const char* msg, const char *name, TRAPS) { if (!b) { classfile_parse_error(msg, name, CHECK); } } inline void guarantee_property(bool b, const char* msg, int index, const char *name, TRAPS) { if (!b) { classfile_parse_error(msg, index, name, CHECK); } } void throwIllegalSignature( const char* type, Symbol* name, Symbol* sig, TRAPS); bool is_supported_version(u2 major, u2 minor); bool has_illegal_visibility(jint flags); void verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS); void verify_legal_utf8(const unsigned char* buffer, int length, TRAPS); void verify_legal_class_name(Symbol* name, TRAPS); void verify_legal_field_name(Symbol* name, TRAPS); void verify_legal_method_name(Symbol* name, TRAPS); void verify_legal_field_signature(Symbol* fieldname, Symbol* signature, TRAPS); int verify_legal_method_signature(Symbol* methodname, Symbol* signature, TRAPS); void verify_legal_class_modifiers(jint flags, TRAPS); void verify_legal_field_modifiers(jint flags, bool is_interface, TRAPS); void verify_legal_method_modifiers(jint flags, bool is_interface, Symbol* name, TRAPS); bool verify_unqualified_name(char* name, unsigned int length, int type); char* skip_over_field_name(char* name, bool slash_ok, unsigned int length); char* skip_over_field_signature(char* signature, bool void_ok, unsigned int length, TRAPS); bool is_anonymous() { assert(AnonymousClasses || _host_klass.is_null(), ""); return _host_klass.not_null(); } bool has_cp_patch_at(int index) { assert(AnonymousClasses, ""); assert(index >= 0, "oob"); return (_cp_patches != NULL && index < _cp_patches->length() && _cp_patches->adr_at(index)->not_null()); } Handle cp_patch_at(int index) { assert(has_cp_patch_at(index), "oob"); return _cp_patches->at(index); } Handle clear_cp_patch_at(int index) { Handle patch = cp_patch_at(index); _cp_patches->at_put(index, Handle()); assert(!has_cp_patch_at(index), ""); return patch; } void patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS); // Wrapper for constantTag.is_klass_[or_]reference. // In older versions of the VM, klassOops cannot sneak into early phases of // constant pool construction, but in later versions they can. // %%% Let's phase out the old is_klass_reference. bool is_klass_reference(constantPoolHandle cp, int index) { return ((LinkWellKnownClasses || AnonymousClasses) ? cp->tag_at(index).is_klass_or_reference() : cp->tag_at(index).is_klass_reference()); } public: // Constructor ClassFileParser(ClassFileStream* st) { set_stream(st); } // Parse .class file and return new klassOop. The klassOop is not hooked up // to the system dictionary or any other structures, so a .class file can // be loaded several times if desired. // The system dictionary hookup is done by the caller. // // "parsed_name" is updated by this method, and is the name found // while parsing the stream. instanceKlassHandle parseClassFile(Symbol* name, Handle class_loader, Handle protection_domain, TempNewSymbol& parsed_name, bool verify, TRAPS) { KlassHandle no_host_klass; return parseClassFile(name, class_loader, protection_domain, no_host_klass, NULL, parsed_name, verify, THREAD); } instanceKlassHandle parseClassFile(Symbol* name, Handle class_loader, Handle protection_domain, KlassHandle host_klass, GrowableArray* cp_patches, TempNewSymbol& parsed_name, bool verify, TRAPS); // Verifier checks static void check_super_class_access(instanceKlassHandle this_klass, TRAPS); static void check_super_interface_access(instanceKlassHandle this_klass, TRAPS); static void check_final_method_override(instanceKlassHandle this_klass, TRAPS); static void check_illegal_static_method(instanceKlassHandle this_klass, TRAPS); }; #endif // SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP