1 /* 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "memory/iterator.hpp" 27 #include "oops/oop.inline.hpp" 28 29 void KlassToOopClosure::do_klass(Klass* k) { 30 k->oops_do(_oop_closure); 31 } 32 33 void ObjectToOopClosure::do_object(oop obj) { 34 obj->oop_iterate(_cl); 35 } 36 37 void VoidClosure::do_void() { 38 ShouldNotCallThis(); 39 } 40 41 MarkingCodeBlobClosure::MarkScope::MarkScope(bool activate) 42 : _active(activate) 43 { 44 if (_active) nmethod::oops_do_marking_prologue(); 45 } 46 47 MarkingCodeBlobClosure::MarkScope::~MarkScope() { 48 if (_active) nmethod::oops_do_marking_epilogue(); 49 } 50 51 void MarkingCodeBlobClosure::do_code_blob(CodeBlob* cb) { 52 nmethod* nm = cb->as_nmethod_or_null(); 53 if (nm == NULL) return; 54 if (!nm->test_set_oops_do_mark()) { 55 NOT_PRODUCT(if (TraceScavenge) nm->print_on(tty, "oops_do, 1st visit\n")); 56 do_newly_marked_nmethod(nm); 57 } else { 58 NOT_PRODUCT(if (TraceScavenge) nm->print_on(tty, "oops_do, skipped on 2nd visit\n")); 59 } 60 } 61 62 void CodeBlobToOopClosure::do_newly_marked_nmethod(nmethod* nm) { 63 nm->oops_do(_cl, /*do_strong_roots_only=*/ true); 64 } 65 66 void CodeBlobToOopClosure::do_code_blob(CodeBlob* cb) { 67 if (!_do_marking) { 68 nmethod* nm = cb->as_nmethod_or_null(); 69 NOT_PRODUCT(if (TraceScavenge && Verbose && nm != NULL) nm->print_on(tty, "oops_do, unmarked visit\n")); 70 // This assert won't work, since there are lots of mini-passes 71 // (mostly in debug mode) that co-exist with marking phases. 72 //assert(!(cb->is_nmethod() && ((nmethod*)cb)->test_oops_do_mark()), "found marked nmethod during mark-free phase"); 73 if (nm != NULL) { 74 nm->oops_do(_cl); 75 } 76 } else { 77 MarkingCodeBlobClosure::do_code_blob(cb); 78 } 79 } 80 81