1 /* 2 * Copyright (c) 2017, 2018, 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 "gc/g1/g1CollectedHeap.hpp" 27 #include "gc/g1/g1FullGCMarker.inline.hpp" 28 #include "gc/g1/g1FullGCOopClosures.inline.hpp" 29 #include "logging/logStream.hpp" 30 #include "memory/iterator.inline.hpp" 31 #include "oops/access.inline.hpp" 32 #include "oops/compressedOops.inline.hpp" 33 #include "oops/oop.inline.hpp" 34 35 void G1FollowStackClosure::do_void() { _marker->drain_stack(); } 36 37 void G1FullKeepAliveClosure::do_oop(oop* p) { do_oop_work(p); } 38 void G1FullKeepAliveClosure::do_oop(narrowOop* p) { do_oop_work(p); } 39 40 G1VerifyOopClosure::G1VerifyOopClosure(VerifyOption option) : 41 _g1h(G1CollectedHeap::heap()), 42 _containing_obj(NULL), 43 _verify_option(option), 44 _cc(0), 45 _failures(false) { 46 } 47 48 void G1VerifyOopClosure::print_object(outputStream* out, oop obj) { 49 #ifdef PRODUCT 50 Klass* k = obj->klass(); 51 const char* class_name = InstanceKlass::cast(k)->external_name(); 52 out->print_cr("class name %s", class_name); 53 #else // PRODUCT 54 obj->print_on(out); 55 #endif // PRODUCT 56 } 57 58 template <class T> void G1VerifyOopClosure::do_oop_work(T* p) { 59 T heap_oop = RawAccess<>::oop_load(p); 60 if (!CompressedOops::is_null(heap_oop)) { 61 _cc++; 62 oop obj = CompressedOops::decode_not_null(heap_oop); 63 bool failed = false; 64 if (!_g1h->is_in_closed_subset(obj) || _g1h->is_obj_dead_cond(obj, _verify_option)) { 65 MutexLockerEx x(ParGCRareEvent_lock, 66 Mutex::_no_safepoint_check_flag); 67 LogStreamHandle(Error, gc, verify) yy; 68 if (!_failures) { 69 yy.cr(); 70 yy.print_cr("----------"); 71 } 72 if (!_g1h->is_in_closed_subset(obj)) { 73 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p); 74 yy.print_cr("Field " PTR_FORMAT 75 " of live obj " PTR_FORMAT " in region " 76 "[" PTR_FORMAT ", " PTR_FORMAT ")", 77 p2i(p), p2i(_containing_obj), 78 p2i(from->bottom()), p2i(from->end())); 79 print_object(&yy, _containing_obj); 80 yy.print_cr("points to obj " PTR_FORMAT " not in the heap", 81 p2i(obj)); 82 } else { 83 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p); 84 HeapRegion* to = _g1h->heap_region_containing((HeapWord*)obj); 85 yy.print_cr("Field " PTR_FORMAT 86 " of live obj " PTR_FORMAT " in region " 87 "[" PTR_FORMAT ", " PTR_FORMAT ")", 88 p2i(p), p2i(_containing_obj), 89 p2i(from->bottom()), p2i(from->end())); 90 print_object(&yy, _containing_obj); 91 yy.print_cr("points to dead obj " PTR_FORMAT " in region " 92 "[" PTR_FORMAT ", " PTR_FORMAT ")", 93 p2i(obj), p2i(to->bottom()), p2i(to->end())); 94 print_object(&yy, obj); 95 } 96 yy.print_cr("----------"); 97 yy.flush(); 98 _failures = true; 99 failed = true; 100 } 101 } 102 } 103 104 template void G1VerifyOopClosure::do_oop_work(oop*); 105 template void G1VerifyOopClosure::do_oop_work(narrowOop*);