• file
• revisions
• annotate
• diff
• comparison
• raw

test/compiler/EscapeAnalysis/TestAllocatedEscapesPtrComparison.java@833b0f92429a (annotated)

test/compiler/EscapeAnalysis/TestAllocatedEscapesPtrComparison.java

Wed, 27 Aug 2014 08:19:12 -0400

author

zgu

date

Wed, 27 Aug 2014 08:19:12 -0400

changeset 7074

833b0f92429a

parent 0

f90c822e73f8

permissions

-rw-r--r--

8046598: Scalable Native memory tracking development
Summary: Enhance scalability of native memory tracking
Reviewed-by: coleenp, ctornqvi, gtriantafill

aoqi@0	1	/*
aoqi@0	2	* Copyright 2014 Google, Inc. All Rights Reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*/
aoqi@0	23
aoqi@0	24	/*
aoqi@0	25	* @test
aoqi@0	26	* @bug 8043354
aoqi@0	27	* @summary bcEscapeAnalyzer allocated_escapes not conservative enough
aoqi@0	28	* @run main/othervm -XX:CompileOnly=.visitAndPop TestAllocatedEscapesPtrComparison
aoqi@0	29	* @author Chuck Rasbold rasbold@google.com
aoqi@0	30	*/
aoqi@0	31
aoqi@0	32	/*
aoqi@0	33	* Test always passes with -XX:-OptmimizePtrCompare
aoqi@0	34	*/
aoqi@0	35
aoqi@0	36	import java.util.ArrayList;
aoqi@0	37	import java.util.List;
aoqi@0	38
aoqi@0	39	public class TestAllocatedEscapesPtrComparison {
aoqi@0	40
aoqi@0	41	static TestAllocatedEscapesPtrComparison dummy;
aoqi@0	42
aoqi@0	43	class Marker {
aoqi@0	44	}
aoqi@0	45
aoqi@0	46	List<Marker> markerList = new ArrayList<>();
aoqi@0	47
aoqi@0	48	// Suppress compilation of this method, it must be processed
aoqi@0	49	// by the bytecode escape analyzer.
aoqi@0	50
aoqi@0	51	// Make a new marker and put it on the List
aoqi@0	52	Marker getMarker() {
aoqi@0	53	// result escapes through markerList
aoqi@0	54	final Marker result = new Marker();
aoqi@0	55	markerList.add(result);
aoqi@0	56	return result;
aoqi@0	57	}
aoqi@0	58
aoqi@0	59	void visit(int depth) {
aoqi@0	60	// Make a new marker
aoqi@0	61	getMarker();
aoqi@0	62
aoqi@0	63	// Call visitAndPop every once in a while
aoqi@0	64	// Cap the depth of our recursive visits
aoqi@0	65	if (depth % 10 == 2) {
aoqi@0	66	visitAndPop(depth + 1);
aoqi@0	67	} else if (depth < 15) {
aoqi@0	68	visit(depth + 1);
aoqi@0	69	}
aoqi@0	70	}
aoqi@0	71
aoqi@0	72	void visitAndPop(int depth) {
aoqi@0	73	// Random dummy allocation to force EscapeAnalysis to process this method
aoqi@0	74	dummy = new TestAllocatedEscapesPtrComparison();
aoqi@0	75
aoqi@0	76	// Make a new marker
aoqi@0	77	Marker marker = getMarker();
aoqi@0	78
aoqi@0	79	visit(depth + 1);
aoqi@0	80
aoqi@0	81	// Walk and pop the marker list up to the current marker
aoqi@0	82	boolean found = false;
aoqi@0	83	for (int i = markerList.size() - 1; i >= 0; i--) {
aoqi@0	84	Marker removed = markerList.remove(i);
aoqi@0	85
aoqi@0	86	// In the failure, EA mistakenly converts this comparison to false
aoqi@0	87	if (removed == marker) {
aoqi@0	88	found = true;
aoqi@0	89	break;
aoqi@0	90	}
aoqi@0	91	}
aoqi@0	92
aoqi@0	93	if (!found) {
aoqi@0	94	throw new RuntimeException("test fails");
aoqi@0	95	}
aoqi@0	96	}
aoqi@0	97
aoqi@0	98
aoqi@0	99	public static void main(String args[]) {
aoqi@0	100	TestAllocatedEscapesPtrComparison tc = new TestAllocatedEscapesPtrComparison();
aoqi@0	101
aoqi@0	102	// Warmup and run enough times
aoqi@0	103	for (int i = 0; i < 20000; i++) {
aoqi@0	104	tc.visit(0);
aoqi@0	105	}
aoqi@0	106	}
aoqi@0	107	}