c5867cb71b
Store metadata on ClassFileParser instance to be cleaned up by destructor. This enabled some refactoring of the enormous parseClassFile function. Reviewed-by: jmasa, acorn
465 lines
20 KiB
C++
465 lines
20 KiB
C++
/*
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* Copyright (c) 1997, 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP
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#define SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP
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#include "classfile/classFileStream.hpp"
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#include "memory/resourceArea.hpp"
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#include "oops/oop.inline.hpp"
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#include "oops/typeArrayOop.hpp"
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#include "runtime/handles.inline.hpp"
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#include "utilities/accessFlags.hpp"
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#include "classfile/symbolTable.hpp"
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class FieldAllocationCount;
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class FieldLayoutInfo;
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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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Symbol* _class_name;
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ClassLoaderData* _loader_data;
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KlassHandle _host_klass;
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GrowableArray<Handle>* _cp_patches; // overrides for CP entries
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// precomputed flags
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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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int _max_bootstrap_specifier_index; // detects BSS values
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// class attributes parsed before the instance klass is created:
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bool _synthetic_flag;
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int _sde_length;
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char* _sde_buffer;
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Symbol* _sourcefile;
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Symbol* _generic_signature;
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// Metadata created before the instance klass is created. Must be deallocated
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// if not transferred to the InstanceKlass upon successful class loading
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// in which case these pointers have been set to NULL.
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instanceKlassHandle _super_klass;
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ConstantPool* _cp;
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Array<u2>* _fields;
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Array<Method*>* _methods;
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Array<u2>* _inner_classes;
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Array<Klass*>* _local_interfaces;
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Array<Klass*>* _transitive_interfaces;
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AnnotationArray* _annotations;
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AnnotationArray* _type_annotations;
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Array<AnnotationArray*>* _fields_annotations;
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Array<AnnotationArray*>* _fields_type_annotations;
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InstanceKlass* _klass; // InstanceKlass once created.
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void set_class_synthetic_flag(bool x) { _synthetic_flag = x; }
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void set_class_sourcefile(Symbol* x) { _sourcefile = x; }
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void set_class_generic_signature(Symbol* x) { _generic_signature = x; }
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void set_class_sde_buffer(char* x, int len) { _sde_buffer = x; _sde_length = len; }
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void init_parsed_class_attributes(ClassLoaderData* loader_data) {
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_loader_data = loader_data;
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_synthetic_flag = false;
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_sourcefile = NULL;
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_generic_signature = NULL;
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_sde_buffer = NULL;
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_sde_length = 0;
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// initialize the other flags too:
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_has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false;
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_max_bootstrap_specifier_index = -1;
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clear_class_metadata();
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_klass = NULL;
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}
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void apply_parsed_class_attributes(instanceKlassHandle k); // update k
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void apply_parsed_class_metadata(instanceKlassHandle k, int fields_count, TRAPS);
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void clear_class_metadata() {
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// metadata created before the instance klass is created. Must be
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// deallocated if classfile parsing returns an error.
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_cp = NULL;
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_fields = NULL;
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_methods = NULL;
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_inner_classes = NULL;
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_local_interfaces = NULL;
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_transitive_interfaces = NULL;
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_annotations = _type_annotations = NULL;
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_fields_annotations = _fields_type_annotations = NULL;
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}
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class AnnotationCollector {
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public:
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enum Location { _in_field, _in_method, _in_class };
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enum ID {
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_unknown = 0,
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_method_ForceInline,
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_method_DontInline,
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_method_LambdaForm_Compiled,
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_method_LambdaForm_Hidden,
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_sun_misc_Contended,
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_annotation_LIMIT
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};
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const Location _location;
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int _annotations_present;
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u2 _contended_group;
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AnnotationCollector(Location location)
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: _location(location), _annotations_present(0)
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{
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assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
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}
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// If this annotation name has an ID, report it (or _none).
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ID annotation_index(ClassLoaderData* loader_data, Symbol* name);
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// Set the annotation name:
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void set_annotation(ID id) {
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assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
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_annotations_present |= nth_bit((int)id);
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}
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// Report if the annotation is present.
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bool has_any_annotations() { return _annotations_present != 0; }
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bool has_annotation(ID id) { return (nth_bit((int)id) & _annotations_present) != 0; }
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void set_contended_group(u2 group) { _contended_group = group; }
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u2 contended_group() { return _contended_group; }
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void set_contended(bool contended) { set_annotation(_sun_misc_Contended); }
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bool is_contended() { return has_annotation(_sun_misc_Contended); }
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};
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// This class also doubles as a holder for metadata cleanup.
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class FieldAnnotationCollector: public AnnotationCollector {
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ClassLoaderData* _loader_data;
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AnnotationArray* _field_annotations;
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AnnotationArray* _field_type_annotations;
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public:
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FieldAnnotationCollector(ClassLoaderData* loader_data) :
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AnnotationCollector(_in_field),
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_loader_data(loader_data),
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_field_annotations(NULL),
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_field_type_annotations(NULL) {}
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void apply_to(FieldInfo* f);
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~FieldAnnotationCollector();
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AnnotationArray* field_annotations() { return _field_annotations; }
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AnnotationArray* field_type_annotations() { return _field_type_annotations; }
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void set_field_annotations(AnnotationArray* a) { _field_annotations = a; }
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void set_field_type_annotations(AnnotationArray* a) { _field_type_annotations = a; }
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};
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class MethodAnnotationCollector: public AnnotationCollector {
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public:
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MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
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void apply_to(methodHandle m);
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};
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class ClassAnnotationCollector: public AnnotationCollector {
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public:
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ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
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void apply_to(instanceKlassHandle k);
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};
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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(int length, TRAPS);
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constantPoolHandle parse_constant_pool(TRAPS);
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// Interface parsing
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Array<Klass*>* parse_interfaces(int length,
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Handle protection_domain,
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Symbol* class_name,
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bool* has_default_methods,
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TRAPS);
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void record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS);
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instanceKlassHandle parse_super_class(int super_class_index, TRAPS);
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// Field parsing
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void parse_field_attributes(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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FieldAnnotationCollector* parsed_annotations,
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TRAPS);
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Array<u2>* parse_fields(Symbol* class_name,
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bool is_interface,
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FieldAllocationCount *fac,
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u2* java_fields_count_ptr, TRAPS);
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void print_field_layout(Symbol* name,
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Array<u2>* fields,
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constantPoolHandle cp,
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int instance_size,
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int instance_fields_start,
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int instance_fields_end,
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int static_fields_end);
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// Method parsing
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methodHandle parse_method(bool is_interface,
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AccessFlags* promoted_flags,
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TRAPS);
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Array<Method*>* parse_methods(bool is_interface,
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AccessFlags* promoted_flags,
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bool* has_final_method,
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bool* has_default_method,
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TRAPS);
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intArray* sort_methods(Array<Method*>* methods);
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u2* parse_exception_table(u4 code_length, u4 exception_table_length,
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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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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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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, TRAPS);
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u1* parse_stackmap_table(u4 code_attribute_length, TRAPS);
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// Classfile attribute parsing
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void parse_classfile_sourcefile_attribute(TRAPS);
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void parse_classfile_source_debug_extension_attribute(int length, TRAPS);
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u2 parse_classfile_inner_classes_attribute(u1* inner_classes_attribute_start,
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bool parsed_enclosingmethod_attribute,
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u2 enclosing_method_class_index,
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u2 enclosing_method_method_index,
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TRAPS);
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void parse_classfile_attributes(ClassAnnotationCollector* parsed_annotations,
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TRAPS);
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void parse_classfile_synthetic_attribute(TRAPS);
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void parse_classfile_signature_attribute(TRAPS);
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void parse_classfile_bootstrap_methods_attribute(u4 attribute_length, TRAPS);
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// Annotations handling
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AnnotationArray* 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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int skip_annotation(u1* buffer, int limit, int index);
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int skip_annotation_value(u1* buffer, int limit, int index);
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void parse_annotations(u1* buffer, int limit,
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/* Results (currently, only one result is supported): */
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AnnotationCollector* result,
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TRAPS);
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// Final setup
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unsigned int compute_oop_map_count(instanceKlassHandle super,
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unsigned int nonstatic_oop_count,
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int first_nonstatic_oop_offset);
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void fill_oop_maps(instanceKlassHandle k,
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unsigned int nonstatic_oop_map_count,
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int* nonstatic_oop_offsets,
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unsigned int* nonstatic_oop_counts);
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void set_precomputed_flags(instanceKlassHandle k);
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Array<Klass*>* compute_transitive_interfaces(instanceKlassHandle super,
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Array<Klass*>* local_ifs, TRAPS);
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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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void throwIllegalSignature(
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const char* type, Symbol* name, Symbol* sig, TRAPS);
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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, 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(Symbol* name, TRAPS);
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void verify_legal_field_name(Symbol* name, TRAPS);
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void verify_legal_method_name(Symbol* name, TRAPS);
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void verify_legal_field_signature(Symbol* fieldname, Symbol* signature, TRAPS);
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int verify_legal_method_signature(Symbol* methodname, Symbol* 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, Symbol* 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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bool is_anonymous() {
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assert(EnableInvokeDynamic || _host_klass.is_null(), "");
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return _host_klass.not_null();
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}
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bool has_cp_patch_at(int index) {
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assert(EnableInvokeDynamic, "");
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assert(index >= 0, "oob");
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return (_cp_patches != NULL
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&& index < _cp_patches->length()
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&& _cp_patches->adr_at(index)->not_null());
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}
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Handle cp_patch_at(int index) {
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assert(has_cp_patch_at(index), "oob");
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return _cp_patches->at(index);
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}
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Handle clear_cp_patch_at(int index) {
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Handle patch = cp_patch_at(index);
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_cp_patches->at_put(index, Handle());
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assert(!has_cp_patch_at(index), "");
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return patch;
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}
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void patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS);
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// Wrapper for constantTag.is_klass_[or_]reference.
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// In older versions of the VM, Klass*s cannot sneak into early phases of
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// constant pool construction, but in later versions they can.
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// %%% Let's phase out the old is_klass_reference.
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bool valid_klass_reference_at(int index) {
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return _cp->is_within_bounds(index) &&
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(EnableInvokeDynamic
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? _cp->tag_at(index).is_klass_or_reference()
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: _cp->tag_at(index).is_klass_reference());
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}
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// Checks that the cpool index is in range and is a utf8
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bool valid_symbol_at(int cpool_index) {
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return (_cp->is_within_bounds(cpool_index) &&
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_cp->tag_at(cpool_index).is_utf8());
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}
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void copy_localvariable_table(ConstMethod* cm, int lvt_cnt,
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u2* localvariable_table_length,
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u2** localvariable_table_start,
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int lvtt_cnt,
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u2* localvariable_type_table_length,
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u2** localvariable_type_table_start,
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TRAPS);
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void copy_method_annotations(ConstMethod* cm,
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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,
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u1* runtime_visible_parameter_annotations,
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int runtime_visible_parameter_annotations_length,
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u1* runtime_invisible_parameter_annotations,
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int runtime_invisible_parameter_annotations_length,
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u1* runtime_visible_type_annotations,
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int runtime_visible_type_annotations_length,
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u1* runtime_invisible_type_annotations,
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int runtime_invisible_type_annotations_length,
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u1* annotation_default,
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int annotation_default_length,
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TRAPS);
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// lays out fields in class and returns the total oopmap count
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void layout_fields(Handle class_loader, FieldAllocationCount* fac,
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ClassAnnotationCollector* parsed_annotations,
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FieldLayoutInfo* info, 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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~ClassFileParser();
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// Parse .class file and return new Klass*. The Klass* 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(Symbol* name,
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ClassLoaderData* loader_data,
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Handle protection_domain,
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TempNewSymbol& parsed_name,
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bool verify,
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TRAPS) {
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KlassHandle no_host_klass;
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return parseClassFile(name, loader_data, protection_domain, no_host_klass, NULL, parsed_name, verify, THREAD);
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}
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instanceKlassHandle parseClassFile(Symbol* name,
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ClassLoaderData* loader_data,
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Handle protection_domain,
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KlassHandle host_klass,
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GrowableArray<Handle>* cp_patches,
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TempNewSymbol& parsed_name,
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bool verify,
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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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#endif // SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP
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