1 /* 2 * Copyright 1997-2010 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 # include "incls/_precompiled.incl" 26 # include "incls/_iterator.cpp.incl" 27 28 #ifdef ASSERT 29 bool OopClosure::_must_remember_klasses = false; 30 #endif 31 32 void ObjectToOopClosure::do_object(oop obj) { 33 obj->oop_iterate(_cl); 34 } 35 36 void VoidClosure::do_void() { 37 ShouldNotCallThis(); 38 } 39 40 #ifdef ASSERT 41 bool OopClosure::must_remember_klasses() { 42 return _must_remember_klasses; 43 } 44 void OopClosure::set_must_remember_klasses(bool v) { 45 _must_remember_klasses = v; 46 } 47 #endif 48 49 50 MarkingCodeBlobClosure::MarkScope::MarkScope(bool activate) 51 : _active(activate) 52 { 53 if (_active) nmethod::oops_do_marking_prologue(); 54 } 55 56 MarkingCodeBlobClosure::MarkScope::~MarkScope() { 57 if (_active) nmethod::oops_do_marking_epilogue(); 58 } 59 60 void MarkingCodeBlobClosure::do_code_blob(CodeBlob* cb) { 61 nmethod* nm = cb->as_nmethod_or_null(); 62 if (nm == NULL) return; 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 71 void CodeBlobToOopClosure::do_newly_marked_nmethod(nmethod* nm) { 72 nm->oops_do(_cl, /*do_strong_roots_only=*/ true); 73 } 74 75 void CodeBlobToOopClosure::do_code_blob(CodeBlob* cb) { 76 if (!_do_marking) { 77 nmethod* nm = cb->as_nmethod_or_null(); 78 NOT_PRODUCT(if (TraceScavenge && Verbose && nm != NULL) nm->print_on(tty, "oops_do, unmarked visit\n")); 79 // This assert won't work, since there are lots of mini-passes 80 // (mostly in debug mode) that co-exist with marking phases. 81 //assert(!(cb->is_nmethod() && ((nmethod*)cb)->test_oops_do_mark()), "found marked nmethod during mark-free phase"); 82 if (nm != NULL) { 83 nm->oops_do(_cl); 84 } 85 } else { 86 MarkingCodeBlobClosure::do_code_blob(cb); 87 } 88 } 89 90