jdk-sandbox: src/hotspot/share/gc/shared/locationPrinter.cpp@5e2576c303a2 (annotated)

57903 5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	1	/*
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	2	* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	4	*
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	5	* This code is free software; you can redistribute it and/or modify it
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	6	* under the terms of the GNU General Public License version 2 only, as
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	7	* published by the Free Software Foundation.
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	8	*
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	9	* This code is distributed in the hope that it will be useful, but WITHOUT
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	12	* version 2 for more details (a copy is included in the LICENSE file that
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	13	* accompanied this code).
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	14	*
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	15	* You should have received a copy of the GNU General Public License version
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	16	* 2 along with this work; if not, write to the Free Software Foundation,
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	18	*
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	20	* or visit www.oracle.com if you need additional information or have any
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	21	* questions.
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	22	*
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	23	*/
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	24
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	25	#include "precompiled.hpp"
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	26	#include "gc/shared/collectedHeap.hpp"
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	27	#include "gc/shared/locationPrinter.hpp"
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	28	#include "memory/universe.hpp"
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	29	#include "runtime/os.hpp"
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	30	#include "oops/klass.hpp"
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	31
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	32	bool LocationPrinter::is_valid_obj(void* obj) {
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	33	if (!is_object_aligned(obj)) {
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	34	return false;
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	35	}
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	36	if (obj < (void*)os::min_page_size()) {
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	37	return false;
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	38	}
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	39
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	40	// We need at least the mark and the klass word in the committed region.
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	41	if (!os::is_readable_range(obj, (HeapWord*)obj + oopDesc::header_size())) {
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	42	return false;
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	43	}
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	44	if (!Universe::heap()->is_in(obj)) {
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	45	return false;
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	46	}
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	47
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	48	Klass* k = (Klass)oopDesc::load_klass_raw((oopDesc)obj);
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	49	return Klass::is_valid(k);
5e2576c303a2 8229278: Improve hs_err location printing to assume less about GC internals eosterlund parents: diff changeset	50	}

author	eosterlund
	Wed, 28 Aug 2019 11:19:09 +0200
changeset 57903	5e2576c303a2
permissions	-rw-r--r--