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/*
* Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test CheckSegmentedCodeCache
* @bug 8015774
* @summary Checks VM options related to the segmented code cache
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
*
* @build sun.hotspot.WhiteBox
* @run driver ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI
* compiler.codecache.CheckSegmentedCodeCache
*/
package compiler.codecache;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.Platform;
import jdk.test.lib.process.ProcessTools;
import sun.hotspot.WhiteBox;
public class CheckSegmentedCodeCache {
private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
// Code heap names
private static final String NON_METHOD = "CodeHeap 'non-nmethods'";
private static final String PROFILED = "CodeHeap 'profiled nmethods'";
private static final String NON_PROFILED = "CodeHeap 'non-profiled nmethods'";
private static void verifySegmentedCodeCache(ProcessBuilder pb, boolean enabled) throws Exception {
OutputAnalyzer out = new OutputAnalyzer(pb.start());
out.shouldHaveExitValue(0);
if (enabled) {
try {
// Non-nmethod code heap should be always available with the segmented code cache
out.shouldContain(NON_METHOD);
} catch (RuntimeException e) {
// Check if TieredCompilation is disabled (in a client VM)
if(!out.getOutput().contains("-XX:+TieredCompilation not supported in this VM")) {
// Code cache is not segmented
throw new RuntimeException("No code cache segmentation.");
}
}
} else {
out.shouldNotContain(NON_METHOD);
}
}
private static void verifyCodeHeapNotExists(ProcessBuilder pb, String... heapNames) throws Exception {
OutputAnalyzer out = new OutputAnalyzer(pb.start());
out.shouldHaveExitValue(0);
for (String name : heapNames) {
out.shouldNotContain(name);
}
}
private static void failsWith(ProcessBuilder pb, String message) throws Exception {
OutputAnalyzer out = new OutputAnalyzer(pb.start());
out.shouldContain(message);
out.shouldHaveExitValue(1);
}
/**
* Check the result of segmented code cache related VM options.
*/
public static void main(String[] args) throws Exception {
ProcessBuilder pb;
// Disabled with ReservedCodeCacheSize < 240MB
pb = ProcessTools.createJavaProcessBuilder("-XX:ReservedCodeCacheSize=239m",
"-XX:+PrintCodeCache",
"-version");
verifySegmentedCodeCache(pb, false);
// Disabled without TieredCompilation
pb = ProcessTools.createJavaProcessBuilder("-XX:-TieredCompilation",
"-XX:+PrintCodeCache",
"-version");
verifySegmentedCodeCache(pb, false);
// Enabled with TieredCompilation and ReservedCodeCacheSize >= 240MB
pb = ProcessTools.createJavaProcessBuilder("-XX:+TieredCompilation",
"-XX:ReservedCodeCacheSize=240m",
"-XX:+PrintCodeCache",
"-version");
verifySegmentedCodeCache(pb, true);
pb = ProcessTools.createJavaProcessBuilder("-XX:+TieredCompilation",
"-XX:ReservedCodeCacheSize=400m",
"-XX:+PrintCodeCache",
"-version");
verifySegmentedCodeCache(pb, true);
// Always enabled if SegmentedCodeCache is set
pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
"-XX:-TieredCompilation",
"-XX:ReservedCodeCacheSize=239m",
"-XX:+PrintCodeCache",
"-version");
verifySegmentedCodeCache(pb, true);
// The profiled and non-profiled code heaps should not be available in
// interpreter-only mode
pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
"-Xint",
"-XX:+PrintCodeCache",
"-version");
verifyCodeHeapNotExists(pb, PROFILED, NON_PROFILED);
// If we stop compilation at CompLevel_none or CompLevel_simple we
// don't need a profiled code heap.
pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
"-XX:TieredStopAtLevel=0",
"-XX:+PrintCodeCache",
"-version");
verifyCodeHeapNotExists(pb, PROFILED);
pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
"-XX:TieredStopAtLevel=1",
"-XX:+PrintCodeCache",
"-version");
verifyCodeHeapNotExists(pb, PROFILED);
// Fails with too small non-nmethod code heap size
pb = ProcessTools.createJavaProcessBuilder("-XX:NonNMethodCodeHeapSize=100K",
"-version");
failsWith(pb, "Invalid NonNMethodCodeHeapSize");
// Fails if code heap sizes do not add up
pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
"-XX:ReservedCodeCacheSize=10M",
"-XX:NonNMethodCodeHeapSize=5M",
"-XX:ProfiledCodeHeapSize=5M",
"-XX:NonProfiledCodeHeapSize=5M",
"-version");
failsWith(pb, "Invalid code heap sizes");
// Fails if not enough space for VM internal code
long minUseSpace = WHITE_BOX.getUintxVMFlag("CodeCacheMinimumUseSpace");
// minimum size: CodeCacheMinimumUseSpace DEBUG_ONLY(* 3)
long minSize = (Platform.isDebugBuild() ? 3 : 1) * minUseSpace;
pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
"-XX:ReservedCodeCacheSize=" + minSize,
"-XX:InitialCodeCacheSize=100K",
"-version");
failsWith(pb, "Not enough space in non-nmethod code heap to run VM");
}
}
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