Mercurial > hg > truffle
view src/share/vm/gc_implementation/parallelScavenge/psScavenge.inline.hpp @ 5073:2db1ad9dd385
rename PiNode.value to PiNode.object and UnsafeCastNode.x to UnsafeCastNode.object
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Wed, 14 Mar 2012 16:57:18 +0100 |
parents | 95f6641e38e0 |
children | da91efe96a93 |
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/* * Copyright (c) 2002, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_INLINE_HPP #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_INLINE_HPP #include "gc_implementation/parallelScavenge/cardTableExtension.hpp" #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" #include "gc_implementation/parallelScavenge/psPromotionManager.hpp" #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" #include "gc_implementation/parallelScavenge/psScavenge.hpp" inline void PSScavenge::save_to_space_top_before_gc() { ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); _to_space_top_before_gc = heap->young_gen()->to_space()->top(); } template <class T> inline bool PSScavenge::should_scavenge(T* p) { T heap_oop = oopDesc::load_heap_oop(p); if (oopDesc::is_null(heap_oop)) return false; oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); return PSScavenge::is_obj_in_young((HeapWord*)obj); } template <class T> inline bool PSScavenge::should_scavenge(T* p, MutableSpace* to_space) { if (should_scavenge(p)) { oop obj = oopDesc::load_decode_heap_oop_not_null(p); // Skip objects copied to to_space since the scavenge started. HeapWord* const addr = (HeapWord*)obj; return addr < to_space_top_before_gc() || addr >= to_space->end(); } return false; } template <class T> inline bool PSScavenge::should_scavenge(T* p, bool check_to_space) { if (check_to_space) { ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); return should_scavenge(p, heap->young_gen()->to_space()); } return should_scavenge(p); } // Attempt to "claim" oop at p via CAS, push the new obj if successful // This version tests the oop* to make sure it is within the heap before // attempting marking. template <class T, bool promote_immediately> inline void PSScavenge::copy_and_push_safe_barrier(PSPromotionManager* pm, T* p) { assert(should_scavenge(p, true), "revisiting object?"); oop o = oopDesc::load_decode_heap_oop_not_null(p); oop new_obj = o->is_forwarded() ? o->forwardee() : pm->copy_to_survivor_space<promote_immediately>(o); oopDesc::encode_store_heap_oop_not_null(p, new_obj); // We cannot mark without test, as some code passes us pointers // that are outside the heap. if ((!PSScavenge::is_obj_in_young((HeapWord*)p)) && Universe::heap()->is_in_reserved(p)) { if (PSScavenge::is_obj_in_young((HeapWord*)new_obj)) { card_table()->inline_write_ref_field_gc(p, new_obj); } } } template<bool promote_immediately> class PSRootsClosure: public OopClosure { private: PSPromotionManager* _promotion_manager; protected: template <class T> void do_oop_work(T *p) { if (PSScavenge::should_scavenge(p)) { // We never card mark roots, maybe call a func without test? PSScavenge::copy_and_push_safe_barrier<T, promote_immediately>(_promotion_manager, p); } } public: PSRootsClosure(PSPromotionManager* pm) : _promotion_manager(pm) { } void do_oop(oop* p) { PSRootsClosure::do_oop_work(p); } void do_oop(narrowOop* p) { PSRootsClosure::do_oop_work(p); } }; typedef PSRootsClosure</*promote_immediately=*/false> PSScavengeRootsClosure; typedef PSRootsClosure</*promote_immediately=*/true> PSPromoteRootsClosure; #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_INLINE_HPP