1 /* 2 * Copyright (c) 1997, 2013, 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 assert(_oop_closure != NULL, "Not initialized?"); 31 k->oops_do(_oop_closure); 32 } 33 34 void CLDToOopClosure::do_cld(ClassLoaderData* cld) { 35 cld->oops_do(_oop_closure, &_klass_closure, _must_claim_cld); 36 } 37 38 void ObjectToOopClosure::do_object(oop obj) { 39 obj->oop_iterate(_cl); 40 } 41 42 void VoidClosure::do_void() { 43 ShouldNotCallThis(); 44 } 45 46 MarkingCodeBlobClosure::MarkScope::MarkScope(bool activate) 47 : _active(activate) 48 { 49 if (_active) nmethod::oops_do_marking_prologue(); 50 } 51 52 MarkingCodeBlobClosure::MarkScope::~MarkScope() { 53 if (_active) nmethod::oops_do_marking_epilogue(); 54 } 55 56 void MarkingCodeBlobClosure::do_code_blob(CodeBlob* cb) { 57 nmethod* nm = cb->as_nmethod_or_null(); 58 if (nm == NULL) return; 59 if (!nm->test_set_oops_do_mark()) { 60 NOT_PRODUCT(if (TraceScavenge) nm->print_on(tty, "oops_do, 1st visit\n")); 61 do_newly_marked_nmethod(nm); 62 } else { 63 NOT_PRODUCT(if (TraceScavenge) nm->print_on(tty, "oops_do, skipped on 2nd visit\n")); 64 } 65 } 66 67 void CodeBlobToOopClosure::do_newly_marked_nmethod(nmethod* nm) { 68 nm->oops_do(_cl, /*allow_zombie=*/ false); 69 } 70 71 void CodeBlobToOopClosure::do_code_blob(CodeBlob* cb) { 72 if (!_do_marking) { 73 nmethod* nm = cb->as_nmethod_or_null(); 74 NOT_PRODUCT(if (TraceScavenge && Verbose && nm != NULL) nm->print_on(tty, "oops_do, unmarked visit\n")); 75 // This assert won't work, since there are lots of mini-passes 76 // (mostly in debug mode) that co-exist with marking phases. 77 //assert(!(cb->is_nmethod() && ((nmethod*)cb)->test_oops_do_mark()), "found marked nmethod during mark-free phase"); 78 if (nm != NULL) { 79 nm->oops_do(_cl); 80 } 81 } else { 82 MarkingCodeBlobClosure::do_code_blob(cb); 83 } 84 } 85 86