--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/classfile/dictionary.hpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,219 @@
+/*
+ * Copyright 2003-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+class DictionaryEntry;
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// The data structure for the system dictionary (and the shared system
+// dictionary).
+
+class Dictionary : public TwoOopHashtable {
+ 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,
+ symbolHandle name, Handle loader);
+
+ DictionaryEntry* bucket(int i) {
+ return (DictionaryEntry*)Hashtable::bucket(i);
+ }
+
+ // The following method is not MT-safe and must be done under lock.
+ DictionaryEntry** bucket_addr(int i) {
+ return (DictionaryEntry**)Hashtable::bucket_addr(i);
+ }
+
+ void add_entry(int index, DictionaryEntry* new_entry) {
+ Hashtable::add_entry(index, (HashtableEntry*)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(symbolHandle class_name, Handle class_loader,KlassHandle obj);
+
+ klassOop find_class(int index, unsigned int hash,
+ symbolHandle name, Handle loader);
+
+ klassOop find_shared_class(int index, unsigned int hash, symbolHandle 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, oop 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, symbolHandle name,
+ Handle loader, Handle protection_domain, TRAPS);
+ bool is_valid_protection_domain(int index, unsigned int hash,
+ symbolHandle 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 {
+ 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::next();
+ }
+
+ DictionaryEntry** next_addr() {
+ return (DictionaryEntry**)HashtableEntry::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(symbolOop 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);
+ }
+};