108 lines
3.3 KiB
C++
108 lines
3.3 KiB
C++
/*
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* Copyright (c) 2017, 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_PRIMS_RESOLVEDMETHOD_HPP
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#define SHARE_VM_PRIMS_RESOLVEDMETHOD_HPP
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#include "oops/symbol.hpp"
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#include "utilities/hashtable.hpp"
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// Hashtable to record Method* used in ResolvedMethods, via. ResolvedMethod oops.
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// This is needed for redefinition to replace Method* with redefined versions.
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// Entry in a ResolvedMethodTable, mapping a single oop of java_lang_invoke_ResolvedMethodName which
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// holds JVM Method* in vmtarget.
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class ResolvedMethodEntry : public HashtableEntry<oop, mtClass> {
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public:
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ResolvedMethodEntry* next() const {
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return (ResolvedMethodEntry*)HashtableEntry<oop, mtClass>::next();
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}
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ResolvedMethodEntry** next_addr() {
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return (ResolvedMethodEntry**)HashtableEntry<oop, mtClass>::next_addr();
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}
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oop object();
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oop object_no_keepalive();
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void print_on(outputStream* st) const;
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};
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class ResolvedMethodTable : public Hashtable<oop, mtClass> {
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enum Constants {
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_table_size = 1007
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};
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static int _oops_removed;
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static int _oops_counted;
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static ResolvedMethodTable* _the_table;
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private:
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ResolvedMethodEntry* bucket(int i) {
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return (ResolvedMethodEntry*) Hashtable<oop, mtClass>::bucket(i);
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}
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ResolvedMethodEntry** bucket_addr(int i) {
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return (ResolvedMethodEntry**) Hashtable<oop, mtClass>::bucket_addr(i);
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}
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unsigned int compute_hash(Method* method);
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// need not be locked; no state change
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oop lookup(int index, unsigned int hash, Method* method);
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oop lookup(Method* method);
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// must be done under ResolvedMethodTable_lock
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oop basic_add(Method* method, oop rmethod_name);
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public:
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ResolvedMethodTable();
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static void create_table() {
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assert(_the_table == NULL, "One symbol table allowed.");
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_the_table = new ResolvedMethodTable();
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}
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// Called from java_lang_invoke_ResolvedMethodName
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static oop find_method(Method* method);
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static oop add_method(Handle rmethod_name);
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#if INCLUDE_JVMTI
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// It is called at safepoint only for RedefineClasses
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static void adjust_method_entries(bool * trace_name_printed);
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#endif // INCLUDE_JVMTI
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// Cleanup cleared entries
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static void unlink(BoolObjectClosure* is_alive);
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static void oops_do(OopClosure* f);
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#ifndef PRODUCT
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void print();
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#endif
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void verify();
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};
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#endif // SHARE_VM_PRIMS_RESOLVEDMETHOD_HPP
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