Mercurial > hg > truffle
diff src/share/vm/ci/ciCallProfile.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/ci/ciCallProfile.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,75 @@ +/* + * 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]; + } +};