jdk8-mips64-public/hotspot: src/share/vm/classfile/dictionary.hpp@94ec88ca68e2 (annotated)

src/share/vm/classfile/dictionary.hpp@94ec88ca68e2 (annotated)

src/share/vm/classfile/dictionary.hpp

Wed, 11 Jan 2012 17:34:02 -0500

author: phh
date: Wed, 11 Jan 2012 17:34:02 -0500
changeset 3427: 94ec88ca68e2
parent 2708: 1d1603768966
child 3900: d2a62e0f25eb
permissions: -rw-r--r--

7115199: Add event tracing hooks and Java Flight Recorder infrastructure
Summary: Added a nop tracing infrastructure, JFR makefile changes and other infrastructure used only by JFR.
Reviewed-by: acorn, sspitsyn
Contributed-by: markus.gronlund@oracle.com

 /*
  * Copyright (c) 2003, 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_DICTIONARY_HPP
 #define SHARE_VM_CLASSFILE_DICTIONARY_HPP
 #include "classfile/systemDictionary.hpp"
 #include "oops/instanceKlass.hpp"
 #include "oops/oop.hpp"
 #include "utilities/hashtable.hpp"
 class DictionaryEntry;
 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 // The data structure for the system dictionary (and the shared system
 // dictionary).
 class Dictionary : public TwoOopHashtable<klassOop> {
   friend class VMStructs;
 private:
   // current iteration index.
   static int                    _current_class_index;
   // pointer to the current hash table entry.
   static DictionaryEntry*       _current_class_entry;
   DictionaryEntry* get_entry(int index, unsigned int hash,
                              Symbol* name, Handle loader);
   DictionaryEntry* bucket(int i) {
     return (DictionaryEntry*)Hashtable<klassOop>::bucket(i);
   }
   // The following method is not MT-safe and must be done under lock.
   DictionaryEntry** bucket_addr(int i) {
     return (DictionaryEntry**)Hashtable<klassOop>::bucket_addr(i);
   }
   void add_entry(int index, DictionaryEntry* new_entry) {
     Hashtable<klassOop>::add_entry(index, (HashtableEntry<oop>*)new_entry);
   }
 public:
   Dictionary(int table_size);
   Dictionary(int table_size, HashtableBucket* t, int number_of_entries);
   DictionaryEntry* new_entry(unsigned int hash, klassOop klass, oop loader);
   DictionaryEntry* new_entry();
   void free_entry(DictionaryEntry* entry);
   void add_klass(Symbol* class_name, Handle class_loader,KlassHandle obj);
   klassOop find_class(int index, unsigned int hash,
                       Symbol* name, Handle loader);
   klassOop find_shared_class(int index, unsigned int hash, Symbol* name);
   // Compiler support
   klassOop try_get_next_class();
   // GC support
   void oops_do(OopClosure* f);
   void always_strong_classes_do(OopClosure* blk);
   void classes_do(void f(klassOop));
   void classes_do(void f(klassOop, TRAPS), TRAPS);
   void classes_do(void f(klassOop, oop));
   void classes_do(void f(klassOop, oop, TRAPS), TRAPS);
   void methods_do(void f(methodOop));
   // Classes loaded by the bootstrap loader are always strongly reachable.
   // If we're not doing class unloading, all classes are strongly reachable.
   static bool is_strongly_reachable(oop class_loader, klassOop klass) {
     assert (klass != NULL, "should have non-null klass");
     return (class_loader == NULL || !ClassUnloading);
   }
   // Unload (that is, break root links to) all unmarked classes and
   // loaders.  Returns "true" iff something was unloaded.
   bool do_unloading(BoolObjectClosure* is_alive);
   // Protection domains
   klassOop find(int index, unsigned int hash, Symbol* name,
                 Handle loader, Handle protection_domain, TRAPS);
   bool is_valid_protection_domain(int index, unsigned int hash,
                                   Symbol* name, Handle class_loader,
                                   Handle protection_domain);
   void add_protection_domain(int index, unsigned int hash,
                              instanceKlassHandle klass, Handle loader,
                              Handle protection_domain, TRAPS);
   // Sharing support
   void dump(SerializeOopClosure* soc);
   void restore(SerializeOopClosure* soc);
   void reorder_dictionary();
 #ifndef PRODUCT
   void print();
 #endif
   void verify();
 };
 // The following classes can be in dictionary.cpp, but we need these
 // to be in header file so that SA's vmStructs can access.
 class ProtectionDomainEntry :public CHeapObj {
   friend class VMStructs;
  public:
   ProtectionDomainEntry* _next;
   oop                    _protection_domain;
   ProtectionDomainEntry(oop protection_domain, ProtectionDomainEntry* next) {
     _protection_domain = protection_domain;
     _next              = next;
   }
   ProtectionDomainEntry* next() { return _next; }
   oop protection_domain() { return _protection_domain; }
 };
 // An entry in the system dictionary, this describes a class as
 // { klassOop, loader, protection_domain }.
 class DictionaryEntry : public HashtableEntry<klassOop> {
   friend class VMStructs;
  private:
   // Contains the set of approved protection domains that can access
   // this system dictionary entry.
   ProtectionDomainEntry* _pd_set;
   oop                    _loader;
  public:
   // Tells whether a protection is in the approved set.
   bool contains_protection_domain(oop protection_domain) const;
   // Adds a protection domain to the approved set.
   void add_protection_domain(oop protection_domain);
   klassOop klass() const { return (klassOop)literal(); }
   klassOop* klass_addr() { return (klassOop*)literal_addr(); }
   DictionaryEntry* next() const {
     return (DictionaryEntry*)HashtableEntry<klassOop>::next();
   }
   DictionaryEntry** next_addr() {
     return (DictionaryEntry**)HashtableEntry<klassOop>::next_addr();
   }
   oop loader() const { return _loader; }
   void set_loader(oop loader) { _loader = loader; }
   oop* loader_addr() { return &_loader; }
   ProtectionDomainEntry* pd_set() const { return _pd_set; }
   void set_pd_set(ProtectionDomainEntry* pd_set) { _pd_set = pd_set; }
   bool has_protection_domain() { return _pd_set != NULL; }
   // Tells whether the initiating class' protection can access the this _klass
   bool is_valid_protection_domain(Handle protection_domain) {
     if (!ProtectionDomainVerification) return true;
     if (!SystemDictionary::has_checkPackageAccess()) return true;
     return protection_domain() == NULL
          ? true
          : contains_protection_domain(protection_domain());
   }
   void protection_domain_set_oops_do(OopClosure* f) {
     for (ProtectionDomainEntry* current = _pd_set;
                                 current != NULL;
                                 current = current->_next) {
       f->do_oop(&(current->_protection_domain));
     }
   }
   void verify_protection_domain_set() {
     for (ProtectionDomainEntry* current = _pd_set;
                                 current != NULL;
                                 current = current->_next) {
       current->_protection_domain->verify();
     }
   }
   bool equals(Symbol* class_name, oop class_loader) const {
     klassOop klass = (klassOop)literal();
     return (instanceKlass::cast(klass)->name() == class_name &&
             _loader == class_loader);
   }
   void print() {
     int count = 0;
     for (ProtectionDomainEntry* current = _pd_set;
                                 current != NULL;
                                 current = current->_next) {
       count++;
     }
     tty->print_cr("pd set = #%d", count);
   }
 };
 // Entry in a SymbolPropertyTable, mapping a single Symbol*
 // to a managed and an unmanaged pointer.
 class SymbolPropertyEntry : public HashtableEntry<Symbol*> {
   friend class VMStructs;
  private:
   intptr_t _symbol_mode;  // secondary key
   oop     _property_oop;
   address _property_data;
  public:
   Symbol* symbol() const            { return literal(); }
   intptr_t symbol_mode() const      { return _symbol_mode; }
   void set_symbol_mode(intptr_t m)  { _symbol_mode = m; }
   oop      property_oop() const     { return _property_oop; }
   void set_property_oop(oop p)      { _property_oop = p; }
   address  property_data() const    { return _property_data; }
   void set_property_data(address p) { _property_data = p; }
   SymbolPropertyEntry* next() const {
     return (SymbolPropertyEntry*)HashtableEntry<Symbol*>::next();
   }
   SymbolPropertyEntry** next_addr() {
     return (SymbolPropertyEntry**)HashtableEntry<Symbol*>::next_addr();
   }
   oop* property_oop_addr()          { return &_property_oop; }
   void print_on(outputStream* st) const {
     symbol()->print_value_on(st);
     st->print("/mode="INTX_FORMAT, symbol_mode());
     st->print(" -> ");
     bool printed = false;
     if (property_oop() != NULL) {
       property_oop()->print_value_on(st);
       printed = true;
     }
     if (property_data() != NULL) {
       if (printed)  st->print(" and ");
       st->print(INTPTR_FORMAT, property_data());
       printed = true;
     }
     st->print_cr(printed ? "" : "(empty)");
   }
 };
 // A system-internal mapping of symbols to pointers, both managed
 // and unmanaged.  Used to record the auto-generation of each method
 // MethodHandle.invoke(S)T, for all signatures (S)T.
 class SymbolPropertyTable : public Hashtable<Symbol*> {
   friend class VMStructs;
 private:
   SymbolPropertyEntry* bucket(int i) {
     return (SymbolPropertyEntry*) Hashtable<Symbol*>::bucket(i);
   }
   // The following method is not MT-safe and must be done under lock.
   SymbolPropertyEntry** bucket_addr(int i) {
     return (SymbolPropertyEntry**) Hashtable<Symbol*>::bucket_addr(i);
   }
   void add_entry(int index, SymbolPropertyEntry* new_entry) {
     ShouldNotReachHere();
   }
   void set_entry(int index, SymbolPropertyEntry* new_entry) {
     ShouldNotReachHere();
   }
   SymbolPropertyEntry* new_entry(unsigned int hash, Symbol* symbol, intptr_t symbol_mode) {
     SymbolPropertyEntry* entry = (SymbolPropertyEntry*) Hashtable<Symbol*>::new_entry(hash, symbol);
     // Hashtable with Symbol* literal must increment and decrement refcount.
     symbol->increment_refcount();
     entry->set_symbol_mode(symbol_mode);
     entry->set_property_oop(NULL);
     entry->set_property_data(NULL);
     return entry;
   }
 public:
   SymbolPropertyTable(int table_size);
   SymbolPropertyTable(int table_size, HashtableBucket* t, int number_of_entries);
   void free_entry(SymbolPropertyEntry* entry) {
     // decrement Symbol refcount here because hashtable doesn't.
     entry->literal()->decrement_refcount();
     Hashtable<Symbol*>::free_entry(entry);
   }
   unsigned int compute_hash(Symbol* sym, intptr_t symbol_mode) {
     // Use the regular identity_hash.
     return Hashtable<Symbol*>::compute_hash(sym) ^ symbol_mode;
   }
   int index_for(Symbol* name, intptr_t symbol_mode) {
     return hash_to_index(compute_hash(name, symbol_mode));
   }
   // need not be locked; no state change
   SymbolPropertyEntry* find_entry(int index, unsigned int hash, Symbol* name, intptr_t name_mode);
   // must be done under SystemDictionary_lock
   SymbolPropertyEntry* add_entry(int index, unsigned int hash, Symbol* name, intptr_t name_mode);
   // GC support
   void oops_do(OopClosure* f);
   void methods_do(void f(methodOop));
   // Sharing support
   void dump(SerializeOopClosure* soc);
   void restore(SerializeOopClosure* soc);
   void reorder_dictionary();
 #ifndef PRODUCT
   void print();
 #endif
   void verify();
 };
 #endif // SHARE_VM_CLASSFILE_DICTIONARY_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/classfile/dictionary.hpp@94ec88ca68e2 (annotated)

src/share/vm/classfile/dictionary.hpp