jdk8-mips64-public/hotspot: src/share/vm/classfile/classFileParser.hpp@da91efe96a93 (annotated)

src/share/vm/classfile/classFileParser.hpp@da91efe96a93 (annotated)

src/share/vm/classfile/classFileParser.hpp

Sat, 01 Sep 2012 13:25:18 -0400

author: coleenp
date: Sat, 01 Sep 2012 13:25:18 -0400
changeset 4037: da91efe96a93
parent 3969: 1d7922586cf6
child 4142: d8ce2825b193
child 4163: 19eb999cb72c
permissions: -rw-r--r--

6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>

 /*
  * Copyright (c) 1997, 2012, 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"
 #include "classfile/symbolTable.hpp"
 class FieldAllocationCount;
 // 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<Handle>* _cp_patches; // overrides for CP entries
   // precomputed flags
   bool _has_finalizer;
   bool _has_empty_finalizer;
   bool _has_vanilla_constructor;
   int _max_bootstrap_specifier_index;  // detects BSS values
   // class attributes parsed before the instance klass is created:
   bool       _synthetic_flag;
   Symbol*    _sourcefile;
   Symbol*    _generic_signature;
   char*      _sde_buffer;
   int        _sde_length;
   Array<u2>* _inner_classes;
   AnnotationArray* _annotations;
   void set_class_synthetic_flag(bool x)           { _synthetic_flag = x; }
   void set_class_sourcefile(Symbol* x)            { _sourcefile = x; }
   void set_class_generic_signature(Symbol* x)     { _generic_signature = x; }
   void set_class_sde_buffer(char* x, int len)     { _sde_buffer = x; _sde_length = len; }
   void set_class_inner_classes(Array<u2>* x)      { _inner_classes = x; }
   void set_class_annotations(AnnotationArray* x)  { _annotations = x; }
   void init_parsed_class_attributes() {
     _synthetic_flag = false;
     _sourcefile = NULL;
     _generic_signature = NULL;
     _sde_buffer = NULL;
     _sde_length = 0;
     // initialize the other flags too:
     _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false;
     _max_bootstrap_specifier_index = -1;
   }
   void apply_parsed_class_attributes(instanceKlassHandle k);  // update k
   class AnnotationCollector {
   public:
     enum Location { _in_field, _in_method, _in_class };
     enum ID {
       _unknown = 0,
       _method_ForceInline,
       _method_DontInline,
       _method_LambdaForm_Compiled,
       _method_LambdaForm_Hidden,
       _annotation_LIMIT
     };
     const Location _location;
     int _annotations_present;
     AnnotationCollector(Location location)
     : _location(location), _annotations_present(0)
     {
       assert((int)_annotation_LIMIT <= (int)sizeof(_annotations_present) * BitsPerByte, "");
     }
     // If this annotation name has an ID, report it (or _none).
     ID annotation_index(Symbol* name);
     // Set the annotation name:
     void set_annotation(ID id) {
       assert((int)id >= 0 && (int)id < (int)_annotation_LIMIT, "oob");
       _annotations_present |= nth_bit((int)id);
     }
     // Report if the annotation is present.
     bool has_any_annotations() { return _annotations_present != 0; }
     bool has_annotation(ID id) { return (nth_bit((int)id) & _annotations_present) != 0; }
   };
   class FieldAnnotationCollector: public AnnotationCollector {
   public:
     FieldAnnotationCollector() : AnnotationCollector(_in_field) { }
     void apply_to(FieldInfo* f);
   };
   class MethodAnnotationCollector: public AnnotationCollector {
   public:
     MethodAnnotationCollector() : AnnotationCollector(_in_method) { }
     void apply_to(methodHandle m);
   };
   class ClassAnnotationCollector: public AnnotationCollector {
   public:
     ClassAnnotationCollector() : AnnotationCollector(_in_class) { }
     void apply_to(instanceKlassHandle k);
   };
   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(ClassLoaderData* loader_data,
                                    constantPoolHandle cp, int length, TRAPS);
   constantPoolHandle parse_constant_pool(ClassLoaderData* loader_data, TRAPS);
   // Interface parsing
   Array<Klass*>* parse_interfaces(constantPoolHandle cp,
                                   int length,
                                     ClassLoaderData* loader_data,
                                   Handle protection_domain,
                                   Symbol* class_name,
                                   TRAPS);
   void record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS);
   // Field parsing
   void parse_field_attributes(ClassLoaderData* loader_data,
                               constantPoolHandle cp, u2 attributes_count,
                               bool is_static, u2 signature_index,
                               u2* constantvalue_index_addr,
                               bool* is_synthetic_addr,
                               u2* generic_signature_index_addr,
                               AnnotationArray** field_annotations,
                               FieldAnnotationCollector* parsed_annotations,
                               TRAPS);
   Array<u2>* parse_fields(ClassLoaderData* loader_data,
                           Symbol* class_name,
                                constantPoolHandle cp, bool is_interface,
                                FieldAllocationCount *fac,
                           Array<AnnotationArray*>** fields_annotations,
                                u2* java_fields_count_ptr, TRAPS);
   // Method parsing
   methodHandle parse_method(ClassLoaderData* loader_data,
                             constantPoolHandle cp,
                             bool is_interface,
                             AccessFlags* promoted_flags,
                             AnnotationArray** method_annotations,
                             AnnotationArray** method_parameter_annotations,
                             AnnotationArray** method_default_annotations,
                             TRAPS);
   Array<Method*>* parse_methods(ClassLoaderData* loader_data,
                                   constantPoolHandle cp,
                                   bool is_interface,
                                 AccessFlags* promoted_flags,
                                 bool* has_final_method,
                                   Array<AnnotationArray*>** methods_annotations,
                                   Array<AnnotationArray*>** methods_parameter_annotations,
                                   Array<AnnotationArray*>** methods_default_annotations,
                                 TRAPS);
   Array<int>* sort_methods(ClassLoaderData* loader_data,
                            Array<Method*>* methods,
                            Array<AnnotationArray*>* methods_annotations,
                            Array<AnnotationArray*>* methods_parameter_annotations,
                            Array<AnnotationArray*>* methods_default_annotations,
                                 TRAPS);
   u2* parse_exception_table(ClassLoaderData* loader_data,
                             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);
   Array<u1>* parse_stackmap_table(ClassLoaderData* loader_data, u4 code_attribute_length, TRAPS);
   // Classfile attribute parsing
   void parse_classfile_sourcefile_attribute(constantPoolHandle cp, TRAPS);
   void parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
                                                         int length, TRAPS);
   u2   parse_classfile_inner_classes_attribute(ClassLoaderData* loader_data,
                                                u1* inner_classes_attribute_start,
                                                bool parsed_enclosingmethod_attribute,
                                                u2 enclosing_method_class_index,
                                                u2 enclosing_method_method_index,
                                                constantPoolHandle cp,
                                                TRAPS);
   void parse_classfile_attributes(ClassLoaderData* loader_data,
                                   constantPoolHandle cp,
                                   ClassAnnotationCollector* parsed_annotations,
                                   TRAPS);
   void parse_classfile_synthetic_attribute(constantPoolHandle cp, TRAPS);
   void parse_classfile_signature_attribute(constantPoolHandle cp, TRAPS);
   void parse_classfile_bootstrap_methods_attribute(ClassLoaderData* loader_data, constantPoolHandle cp, u4 attribute_length, TRAPS);
   // Annotations handling
   AnnotationArray* assemble_annotations(ClassLoaderData* loader_data,
                                         u1* runtime_visible_annotations,
                                        int runtime_visible_annotations_length,
                                        u1* runtime_invisible_annotations,
                                        int runtime_invisible_annotations_length, TRAPS);
   int skip_annotation(u1* buffer, int limit, int index);
   int skip_annotation_value(u1* buffer, int limit, int index);
   void parse_annotations(u1* buffer, int limit, constantPoolHandle cp,
                          /* Results (currently, only one result is supported): */
                          AnnotationCollector* result,
                          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);
   Array<Klass*>* compute_transitive_interfaces(ClassLoaderData* loader_data,
                                                  instanceKlassHandle super,
                                                  Array<Klass*>* local_ifs, 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(EnableInvokeDynamic || _host_klass.is_null(), "");
     return _host_klass.not_null();
   }
   bool has_cp_patch_at(int index) {
     assert(EnableInvokeDynamic, "");
     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, Klass*s 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 || EnableInvokeDynamic)
             ? 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 Klass*. The Klass* 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<Handle>* 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

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/classfile/classFileParser.hpp@da91efe96a93 (annotated)

src/share/vm/classfile/classFileParser.hpp