Mercurial > hg > graal-jvmci-8
diff src/share/vm/memory/specialized_oop_closures.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | 37f87013dfd8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/memory/specialized_oop_closures.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,235 @@ +/* + * Copyright 2001-2006 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. + * + */ + +// The following OopClosure types get specialized versions of +// "oop_oop_iterate" that invoke the closures' do_oop methods +// non-virtually, using a mechanism defined in this file. Extend these +// macros in the obvious way to add specializations for new closures. + +// Forward declarations. +class OopClosure; +class OopsInGenClosure; +// DefNew +class ScanClosure; +class FastScanClosure; +class FilteringClosure; +// ParNew +class ParScanWithBarrierClosure; +class ParScanWithoutBarrierClosure; +// CMS +class MarkRefsIntoAndScanClosure; +class Par_MarkRefsIntoAndScanClosure; +class PushAndMarkClosure; +class Par_PushAndMarkClosure; +class PushOrMarkClosure; +class Par_PushOrMarkClosure; +class CMSKeepAliveClosure; +class CMSInnerParMarkAndPushClosure; + +// This macro applies an argument macro to all OopClosures for which we +// want specialized bodies of "oop_oop_iterate". The arguments to "f" are: +// "f(closureType, non_virtual)" +// where "closureType" is the name of the particular subclass of OopClosure, +// and "non_virtual" will be the string "_nv" if the closure type should +// have its "do_oop" method invoked non-virtually, or else the +// string "_v". ("OopClosure" itself will be the only class in the latter +// category.) + +// This is split into several because of a Visual C++ 6.0 compiler bug +// where very long macros cause the compiler to crash + +#define SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_S(f) \ + f(ScanClosure,_nv) \ + f(FastScanClosure,_nv) \ + f(FilteringClosure,_nv) + +#ifndef SERIALGC +#define SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_P(f) \ + f(ParScanWithBarrierClosure,_nv) \ + f(ParScanWithoutBarrierClosure,_nv) +#else // SERIALGC +#define SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_P(f) +#endif // SERIALGC + +#define SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_1(f) \ + SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_S(f) \ + SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_P(f) + +#ifndef SERIALGC +#define SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_3(f) \ + f(MarkRefsIntoAndScanClosure,_nv) \ + f(Par_MarkRefsIntoAndScanClosure,_nv) \ + f(PushAndMarkClosure,_nv) \ + f(Par_PushAndMarkClosure,_nv) \ + f(PushOrMarkClosure,_nv) \ + f(Par_PushOrMarkClosure,_nv) \ + f(CMSKeepAliveClosure,_nv) \ + f(CMSInnerParMarkAndPushClosure,_nv) +#else // SERIALGC +#define SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_3(f) +#endif // SERIALGC + +// We separate these out, because sometime the general one has +// a different definition from the specialized ones, and sometimes it +// doesn't. + +#define ALL_OOP_OOP_ITERATE_CLOSURES_1(f) \ + f(OopClosure,_v) \ + SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_1(f) + +#define ALL_OOP_OOP_ITERATE_CLOSURES_3(f) \ + SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_3(f) + +#ifndef SERIALGC +// This macro applies an argument macro to all OopClosures for which we +// want specialized bodies of a family of methods related to +// "par_oop_iterate". The arguments to f are the same as above. +// The "root_class" is the most general class to define; this may be +// "OopClosure" in some applications and "OopsInGenClosure" in others. + +#define SPECIALIZED_PAR_OOP_ITERATE_CLOSURES(f) \ + f(MarkRefsIntoAndScanClosure,_nv) \ + f(PushAndMarkClosure,_nv) \ + f(Par_MarkRefsIntoAndScanClosure,_nv) \ + f(Par_PushAndMarkClosure,_nv) + +#define ALL_PAR_OOP_ITERATE_CLOSURES(f) \ + f(OopClosure,_v) \ + SPECIALIZED_PAR_OOP_ITERATE_CLOSURES(f) +#endif // SERIALGC + +// This macro applies an argument macro to all OopClosures for which we +// want specialized bodies of a family of methods related to +// "oops_since_save_marks_do". The arguments to f are the same as above. +// The "root_class" is the most general class to define; this may be +// "OopClosure" in some applications and "OopsInGenClosure" in others. + +#define SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES_YOUNG_S(f) \ + f(ScanClosure,_nv) \ + f(FastScanClosure,_nv) + +#ifndef SERIALGC +#define SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES_YOUNG_P(f) \ + f(ParScanWithBarrierClosure,_nv) \ + f(ParScanWithoutBarrierClosure,_nv) +#else // SERIALGC +#define SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES_YOUNG_P(f) +#endif // SERIALGC + +#define SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES_YOUNG(f) \ + SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES_YOUNG_S(f) \ + SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES_YOUNG_P(f) + +#define SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES(f) \ + SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES_YOUNG(f) + +// We separate these out, because sometime the general one has +// a different definition from the specialized ones, and sometimes it +// doesn't. +// NOTE: One of the valid criticisms of this +// specialize-oop_oop_iterate-for-specific-closures idiom is that it is +// easy to have a silent performance bug: if you fail to de-virtualize, +// things still work, just slower. The "SpecializationStats" mode is +// intended to at least make such a failure easy to detect. +// *Not* using the ALL_SINCE_SAVE_MARKS_CLOSURES(f) macro defined +// below means that *only* closures for which oop_oop_iterate specializations +// exist above may be applied to "oops_since_save_marks". That is, +// this form of the performance bug is caught statically. When you add +// a definition for the general type, this property goes away. +// Make sure you test with SpecializationStats to find such bugs +// when introducing a new closure where you don't want virtual dispatch. + +#define ALL_SINCE_SAVE_MARKS_CLOSURES(f) \ + f(OopsInGenClosure,_v) \ + SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES(f) + +// For keeping stats on effectiveness. +#define ENABLE_SPECIALIZATION_STATS 0 + + +class SpecializationStats { +public: + enum Kind { + ik, // instanceKlass + irk, // instanceRefKlass + oa, // objArrayKlass + NUM_Kinds + }; + +#if ENABLE_SPECIALIZATION_STATS +private: + static int _numCallsAll; + + static int _numCallsTotal[NUM_Kinds]; + static int _numCalls_nv[NUM_Kinds]; + + static int _numDoOopCallsTotal[NUM_Kinds]; + static int _numDoOopCalls_nv[NUM_Kinds]; +public: +#endif + static void clear() PRODUCT_RETURN; + + static inline void record_call() PRODUCT_RETURN; + static inline void record_iterate_call_v(Kind k) PRODUCT_RETURN; + static inline void record_iterate_call_nv(Kind k) PRODUCT_RETURN; + static inline void record_do_oop_call_v(Kind k) PRODUCT_RETURN; + static inline void record_do_oop_call_nv(Kind k) PRODUCT_RETURN; + + static void print() PRODUCT_RETURN; +}; + +#ifndef PRODUCT +#if ENABLE_SPECIALIZATION_STATS + +inline void SpecializationStats::record_call() { + _numCallsAll++;; +} +inline void SpecializationStats::record_iterate_call_v(Kind k) { + _numCallsTotal[k]++; +} +inline void SpecializationStats::record_iterate_call_nv(Kind k) { + _numCallsTotal[k]++; + _numCalls_nv[k]++; +} + +inline void SpecializationStats::record_do_oop_call_v(Kind k) { + _numDoOopCallsTotal[k]++; +} +inline void SpecializationStats::record_do_oop_call_nv(Kind k) { + _numDoOopCallsTotal[k]++; + _numDoOopCalls_nv[k]++; +} + +#else // !ENABLE_SPECIALIZATION_STATS + +inline void SpecializationStats::record_call() {} +inline void SpecializationStats::record_iterate_call_v(Kind k) {} +inline void SpecializationStats::record_iterate_call_nv(Kind k) {} +inline void SpecializationStats::record_do_oop_call_v(Kind k) {} +inline void SpecializationStats::record_do_oop_call_nv(Kind k) {} +inline void SpecializationStats::clear() {} +inline void SpecializationStats::print() {} + +#endif // ENABLE_SPECIALIZATION_STATS +#endif // !PRODUCT