229 lines
11 KiB
C++
229 lines
11 KiB
C++
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/*
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* Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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// Parser for for .class files
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//
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// The bytes describing the class file structure is read from a Stream object
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class ClassFileParser VALUE_OBJ_CLASS_SPEC {
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private:
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bool _need_verify;
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bool _relax_verify;
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u2 _major_version;
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u2 _minor_version;
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symbolHandle _class_name;
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bool _has_finalizer;
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bool _has_empty_finalizer;
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bool _has_vanilla_constructor;
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enum { fixed_buffer_size = 128 };
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u_char linenumbertable_buffer[fixed_buffer_size];
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ClassFileStream* _stream; // Actual input stream
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enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names
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// Accessors
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ClassFileStream* stream() { return _stream; }
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void set_stream(ClassFileStream* st) { _stream = st; }
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// Constant pool parsing
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void parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS);
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constantPoolHandle parse_constant_pool(TRAPS);
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// Interface parsing
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objArrayHandle parse_interfaces(constantPoolHandle cp,
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int length,
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Handle class_loader,
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Handle protection_domain,
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PerfTraceTime* vmtimer,
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symbolHandle class_name,
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TRAPS);
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// Field parsing
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void parse_field_attributes(constantPoolHandle cp, u2 attributes_count,
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bool is_static, u2 signature_index,
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u2* constantvalue_index_addr,
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bool* is_synthetic_addr,
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u2* generic_signature_index_addr,
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typeArrayHandle* field_annotations, TRAPS);
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typeArrayHandle parse_fields(constantPoolHandle cp, bool is_interface,
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struct FieldAllocationCount *fac,
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objArrayHandle* fields_annotations, TRAPS);
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// Method parsing
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methodHandle parse_method(constantPoolHandle cp, bool is_interface,
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AccessFlags* promoted_flags,
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typeArrayHandle* method_annotations,
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typeArrayHandle* method_parameter_annotations,
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typeArrayHandle* method_default_annotations,
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TRAPS);
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objArrayHandle parse_methods (constantPoolHandle cp, bool is_interface,
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AccessFlags* promoted_flags,
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bool* has_final_method,
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objArrayOop* methods_annotations_oop,
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objArrayOop* methods_parameter_annotations_oop,
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objArrayOop* methods_default_annotations_oop,
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TRAPS);
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typeArrayHandle sort_methods (objArrayHandle methods,
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objArrayHandle methods_annotations,
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objArrayHandle methods_parameter_annotations,
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objArrayHandle methods_default_annotations,
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TRAPS);
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typeArrayHandle parse_exception_table(u4 code_length, u4 exception_table_length,
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constantPoolHandle cp, TRAPS);
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void parse_linenumber_table(
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u4 code_attribute_length, u4 code_length,
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CompressedLineNumberWriteStream** write_stream, TRAPS);
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u2* parse_localvariable_table(u4 code_length, u2 max_locals, u4 code_attribute_length,
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constantPoolHandle cp, u2* localvariable_table_length,
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bool isLVTT, TRAPS);
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u2* parse_checked_exceptions(u2* checked_exceptions_length, u4 method_attribute_length,
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constantPoolHandle cp, TRAPS);
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void parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
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u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS);
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typeArrayOop parse_stackmap_table(u4 code_attribute_length, TRAPS);
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// Classfile attribute parsing
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void parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
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void parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
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instanceKlassHandle k, int length, TRAPS);
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u2 parse_classfile_inner_classes_attribute(constantPoolHandle cp,
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instanceKlassHandle k, TRAPS);
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void parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
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void parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
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void parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
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// Annotations handling
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typeArrayHandle assemble_annotations(u1* runtime_visible_annotations,
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int runtime_visible_annotations_length,
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u1* runtime_invisible_annotations,
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int runtime_invisible_annotations_length, TRAPS);
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// Final setup
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int compute_oop_map_size(instanceKlassHandle super, int nonstatic_oop_count,
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int first_nonstatic_oop_offset);
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void fill_oop_maps(instanceKlassHandle k, int nonstatic_oop_map_count,
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u2* nonstatic_oop_offsets, u2* nonstatic_oop_length);
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void set_precomputed_flags(instanceKlassHandle k);
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objArrayHandle compute_transitive_interfaces(instanceKlassHandle super,
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objArrayHandle local_ifs, TRAPS);
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// Special handling for certain classes.
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// Add the "discovered" field to java.lang.ref.Reference if
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// it does not exist.
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void java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr,
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constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS);
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// Adjust the field allocation counts for java.lang.Class to add
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// fake fields.
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void java_lang_Class_fix_pre(objArrayHandle* methods_ptr,
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FieldAllocationCount *fac_ptr, TRAPS);
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// Adjust the next_nonstatic_oop_offset to place the fake fields
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// before any Java fields.
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void java_lang_Class_fix_post(int* next_nonstatic_oop_offset);
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// Format checker methods
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void classfile_parse_error(const char* msg, TRAPS);
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void classfile_parse_error(const char* msg, int index, TRAPS);
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void classfile_parse_error(const char* msg, const char *name, TRAPS);
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void classfile_parse_error(const char* msg, int index, const char *name, TRAPS);
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inline void guarantee_property(bool b, const char* msg, TRAPS) {
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if (!b) { classfile_parse_error(msg, CHECK); }
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}
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inline void assert_property(bool b, const char* msg, TRAPS) {
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#ifdef ASSERT
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if (!b) { fatal(msg); }
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#endif
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}
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inline void check_property(bool property, const char* msg, int index, TRAPS) {
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if (_need_verify) {
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guarantee_property(property, msg, index, CHECK);
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} else {
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assert_property(property, msg, CHECK);
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}
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}
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inline void check_property(bool property, const char* msg, TRAPS) {
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if (_need_verify) {
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guarantee_property(property, msg, CHECK);
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} else {
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assert_property(property, msg, CHECK);
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}
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}
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inline void guarantee_property(bool b, const char* msg, int index, TRAPS) {
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if (!b) { classfile_parse_error(msg, index, CHECK); }
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}
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inline void guarantee_property(bool b, const char* msg, const char *name, TRAPS) {
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if (!b) { classfile_parse_error(msg, name, CHECK); }
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}
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inline void guarantee_property(bool b, const char* msg, int index, const char *name, TRAPS) {
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if (!b) { classfile_parse_error(msg, index, name, CHECK); }
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}
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bool is_supported_version(u2 major, u2 minor);
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bool has_illegal_visibility(jint flags);
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void verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS);
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void verify_legal_utf8(const unsigned char* buffer, int length, TRAPS);
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void verify_legal_class_name(symbolHandle name, TRAPS);
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void verify_legal_field_name(symbolHandle name, TRAPS);
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void verify_legal_method_name(symbolHandle name, TRAPS);
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void verify_legal_field_signature(symbolHandle fieldname, symbolHandle signature, TRAPS);
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int verify_legal_method_signature(symbolHandle methodname, symbolHandle signature, TRAPS);
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void verify_legal_class_modifiers(jint flags, TRAPS);
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void verify_legal_field_modifiers(jint flags, bool is_interface, TRAPS);
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void verify_legal_method_modifiers(jint flags, bool is_interface, symbolHandle name, TRAPS);
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bool verify_unqualified_name(char* name, unsigned int length, int type);
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char* skip_over_field_name(char* name, bool slash_ok, unsigned int length);
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char* skip_over_field_signature(char* signature, bool void_ok, unsigned int length, TRAPS);
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public:
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// Constructor
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ClassFileParser(ClassFileStream* st) { set_stream(st); }
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// Parse .class file and return new klassOop. The klassOop is not hooked up
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// to the system dictionary or any other structures, so a .class file can
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// be loaded several times if desired.
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// The system dictionary hookup is done by the caller.
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//
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// "parsed_name" is updated by this method, and is the name found
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// while parsing the stream.
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instanceKlassHandle parseClassFile(symbolHandle name,
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Handle class_loader,
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Handle protection_domain,
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symbolHandle& parsed_name,
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TRAPS);
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// Verifier checks
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static void check_super_class_access(instanceKlassHandle this_klass, TRAPS);
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static void check_super_interface_access(instanceKlassHandle this_klass, TRAPS);
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static void check_final_method_override(instanceKlassHandle this_klass, TRAPS);
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static void check_illegal_static_method(instanceKlassHandle this_klass, TRAPS);
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};
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