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hotspot/src/share/vm/classfile/resolutionErrors.hpp

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+/*
+ * Copyright 2005 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 ResolutionErrorEntry;
+
+// ResolutionError objects are used to record errors encountered during
+// constant pool resolution (JVMS 5.4.3).
+
+class ResolutionErrorTable : public Hashtable {
+
+public:
+  ResolutionErrorTable(int table_size);
+
+  ResolutionErrorEntry* new_entry(int hash, constantPoolOop pool, int cp_index, symbolOop error);
+
+  ResolutionErrorEntry* bucket(int i) {
+    return (ResolutionErrorEntry*)Hashtable::bucket(i);
+  }
+
+  ResolutionErrorEntry** bucket_addr(int i) {
+    return (ResolutionErrorEntry**)Hashtable::bucket_addr(i);
+  }
+
+  void add_entry(int index, ResolutionErrorEntry* new_entry) {
+    Hashtable::add_entry(index, (HashtableEntry*)new_entry);
+  }
+
+  void add_entry(int index, unsigned int hash,
+                 constantPoolHandle pool, int which, symbolHandle error);
+
+
+  // find error given the constant pool and constant pool index
+  ResolutionErrorEntry* find_entry(int index, unsigned int hash,
+                                   constantPoolHandle pool, int cp_index);
+
+
+  unsigned int compute_hash(constantPoolHandle pool, int cp_index) {
+    return (unsigned int) pool->identity_hash() + cp_index;
+  }
+
+  // purges unloaded entries from the table
+  void purge_resolution_errors(BoolObjectClosure* is_alive);
+
+  // this table keeps symbolOops alive
+  void always_strong_classes_do(OopClosure* blk);
+
+  // GC support.
+  void oops_do(OopClosure* f);
+};
+
+
+class ResolutionErrorEntry : public HashtableEntry {
+ private:
+  int               _cp_index;
+  symbolOop         _error;
+
+ public:
+  constantPoolOop    pool() const               { return (constantPoolOop)literal(); }
+  constantPoolOop*   pool_addr()                { return (constantPoolOop*)literal_addr(); }
+
+  int                cp_index() const           { return _cp_index; }
+  void               set_cp_index(int cp_index) { _cp_index = cp_index; }
+
+  symbolOop          error() const              { return _error; }
+  void               set_error(symbolOop e)     { _error = e; }
+  symbolOop*         error_addr()               { return &_error; }
+
+  ResolutionErrorEntry* next() const {
+    return (ResolutionErrorEntry*)HashtableEntry::next();
+  }
+
+  ResolutionErrorEntry** next_addr() {
+    return (ResolutionErrorEntry**)HashtableEntry::next_addr();
+  }
+
+  // GC support
+  void oops_do(OopClosure* blk);
+};