hotspot/src/share/vm/ci/ciCPCache.hpp
author jrose
Wed, 09 Jun 2010 18:50:45 -0700
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child 7397 5b173b4ca846
permissions -rw-r--r--
6939203: JSR 292 needs method handle constants Summary: Add new CP types CONSTANT_MethodHandle, CONSTANT_MethodType; extend 'ldc' bytecode. Reviewed-by: twisti, never
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/*
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 * Copyright (c) 2009, 2010, 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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// ciCPCache
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//
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// This class represents a constant pool cache.
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//
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// Note: This class is called ciCPCache as ciConstantPoolCache is used
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// for something different.
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class ciCPCache : public ciObject {
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private:
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  constantPoolCacheOop get_cpCacheOop() {   // must be called inside a VM_ENTRY_MARK
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    return (constantPoolCacheOop) get_oop();
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  }
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  ConstantPoolCacheEntry* entry_at(int i) {
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    int raw_index = i;
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    if (constantPoolCacheOopDesc::is_secondary_index(i))
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      raw_index = constantPoolCacheOopDesc::decode_secondary_index(i);
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    return get_cpCacheOop()->entry_at(raw_index);
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  }
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public:
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  ciCPCache(constantPoolCacheHandle cpcache) : ciObject(cpcache) {}
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  // What kind of ciObject is this?
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  bool is_cpcache() const { return true; }
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  // Get the offset in bytes from the oop to the f1 field of the
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  // requested entry.
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  size_t get_f1_offset(int index);
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  bool is_f1_null_at(int index);
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  int get_pool_index(int index);
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  void print();
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};