vm/ci/ciCPCache.hpp

/*
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 * 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.
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#ifndef SHARE_VM_CI_CICPCACHE_HPP
#define SHARE_VM_CI_CICPCACHE_HPP

#include "ci/ciClassList.hpp"
#include "ci/ciObject.hpp"
#include "oops/cpCacheOop.hpp"

// ciCPCache
//
// This class represents a constant pool cache.
//
// Note: This class is called ciCPCache as ciConstantPoolCache is used
// for something different.
class ciCPCache : public ciObject {
private:
  constantPoolCacheOop get_cpCacheOop() {   // must be called inside a VM_ENTRY_MARK
    return (constantPoolCacheOop) get_oop();
  }

  ConstantPoolCacheEntry* entry_at(int i) {
    int raw_index = i;
    if (constantPoolCacheOopDesc::is_secondary_index(i))
      raw_index = constantPoolCacheOopDesc::decode_secondary_index(i);
    return get_cpCacheOop()->entry_at(raw_index);
  }

public:
  ciCPCache(constantPoolCacheHandle cpcache) : ciObject(cpcache) {}

  // What kind of ciObject is this?
  bool is_cpcache() const { return true; }

  // Get the offset in bytes from the oop to the f1 field of the
  // requested entry.
  size_t get_f1_offset(int index);

  bool is_f1_null_at(int index);

  int get_pool_index(int index);

  void print();
};

#endif // SHARE_VM_CI_CICPCACHE_HPP