iterator.cpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 1997, 2009, 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 "incls/_precompiled.incl" 26# include "incls/_iterator.cpp.incl" 27 28#ifdef ASSERT 29bool OopClosure::_must_remember_klasses = false; 30#endif 31 32void ObjectToOopClosure::do_object(oop obj) { 33 obj->oop_iterate(_cl); 34} 35 36void VoidClosure::do_void() { 37 ShouldNotCallThis(); 38} 39 40#ifdef ASSERT 41bool OopClosure::must_remember_klasses() { 42 return _must_remember_klasses; 43} 44void OopClosure::set_must_remember_klasses(bool v) { 45 _must_remember_klasses = v; 46} 47#endif 48 49 50MarkingCodeBlobClosure::MarkScope::MarkScope(bool activate) 51 : _active(activate) 52{ 53 if (_active) nmethod::oops_do_marking_prologue(); 54} 55 56MarkingCodeBlobClosure::MarkScope::~MarkScope() { 57 if (_active) nmethod::oops_do_marking_epilogue(); 58} 59 60void MarkingCodeBlobClosure::do_code_blob(CodeBlob* cb) { 61 if (!cb->is_nmethod()) return; 62 nmethod* nm = (nmethod*) cb; 63 if (!nm->test_set_oops_do_mark()) { 64 NOT_PRODUCT(if (TraceScavenge) nm->print_on(tty, "oops_do, 1st visit\n")); 65 do_newly_marked_nmethod(nm); 66 } else { 67 NOT_PRODUCT(if (TraceScavenge) nm->print_on(tty, "oops_do, skipped on 2nd visit\n")); 68 } 69} 70 71void CodeBlobToOopClosure::do_newly_marked_nmethod(nmethod* nm) { 72 nm->oops_do(_cl, /*do_strong_roots_only=*/ true); 73} 74 75void CodeBlobToOopClosure::do_code_blob(CodeBlob* cb) { 76 if (!_do_marking) { 77 NOT_PRODUCT(if (TraceScavenge && Verbose && cb->is_nmethod()) ((nmethod*)cb)->print_on(tty, "oops_do, unmarked visit\n")); 78 // This assert won't work, since there are lots of mini-passes 79 // (mostly in debug mode) that co-exist with marking phases. 80 //assert(!(cb->is_nmethod() && ((nmethod*)cb)->test_oops_do_mark()), "found marked nmethod during mark-free phase"); 81 cb->oops_do(_cl); 82 } else { 83 MarkingCodeBlobClosure::do_code_blob(cb); 84 } 85} 86 87 88