Mercurial > hg > truffle
view src/share/vm/gc_implementation/parallelScavenge/psScavenge.inline.hpp @ 615:c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
Summary: Call newly created CollectedHeap::dump_{pre,post}_full_gc before and after every stop-world full collection cycle on GenCollectedHeap and ParallelScavengeHeap. (Support for G1CollectedHeap forthcoming under CR 6810861.) Small modifications to existing heap dumping and class histogram implementation, especially to allow multiple on-the-fly histos/dumps by the VM thread during a single safepoint.
Reviewed-by: jmasa, alanb, mchung
author | ysr |
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date | Mon, 02 Mar 2009 16:37:04 -0800 |
parents | d1605aabd0a1 |
children | c18cbe5936b8 |
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/* * Copyright 2002-2008 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. * */ 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> 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(o, pm->depth_first()); 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); } } }