Mercurial > hg > truffle
view src/share/vm/ci/ciCallProfile.hpp @ 690:d142f1feeed5
Merge
author | acorn |
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date | Sun, 29 Mar 2009 18:19:05 -0400 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 1999-2006 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. * */ // ciCallProfile // // This class is used to determine the frequently called method // at some call site class ciCallProfile : StackObj { private: // Fields are initialized directly by ciMethod::call_profile_at_bci. friend class ciMethod; enum { MorphismLimit = 2 }; // Max call site's morphism we care about int _limit; // number of receivers have been determined int _morphism; // determined call site's morphism int _count; // # times has this call been executed int _receiver_count[MorphismLimit + 1]; // # times receivers have been seen ciMethod* _method[MorphismLimit + 1]; // receivers methods ciKlass* _receiver[MorphismLimit + 1]; // receivers (exact) ciCallProfile() { _limit = 0; _morphism = 0; _count = -1; _receiver_count[0] = -1; _method[0] = NULL; _receiver[0] = NULL; } void add_receiver(ciKlass* receiver, int receiver_count); public: // Note: The following predicates return false for invalid profiles: bool has_receiver(int i) { return _limit > i; } int morphism() { return _morphism; } int count() { return _count; } int receiver_count(int i) { assert(i < _limit, "out of Call Profile MorphismLimit"); return _receiver_count[i]; } float receiver_prob(int i) { assert(i < _limit, "out of Call Profile MorphismLimit"); return (float)_receiver_count[i]/(float)_count; } ciMethod* method(int i) { assert(i < _limit, "out of Call Profile MorphismLimit"); return _method[i]; } ciKlass* receiver(int i) { assert(i < _limit, "out of Call Profile MorphismLimit"); return _receiver[i]; } };