114 lines
4.5 KiB
Java
114 lines
4.5 KiB
Java
/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8241071
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* @summary The same JDK build should always generate the same archive file (no randomness).
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* @requires vm.cds
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* @library /test/lib
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* @run driver DeterministicDump
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*/
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import jdk.test.lib.cds.CDSTestUtils;
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import jdk.test.lib.Platform;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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import java.io.FileInputStream;
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import java.io.IOException;
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public class DeterministicDump {
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public static void main(String[] args) throws Exception {
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for (int c = 0; c < 2; c++) { // oop/klass compression
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String sign = (c == 0) ? "+" : "-";
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String coop = "-XX:" + sign + "UseCompressedOops";
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String ckls = "-XX:" + sign + "UseCompressedClassPointers";
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if (!Platform.is64bit()) {
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coop = "-showversion"; // no-op
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ckls = "-showversion"; // no-op
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}
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for (int gc = 0; gc < 2; gc++) { // should we trigger GC during dump
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for (int i = 0; i < 2; i++) {
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String metaspaceSize = "-showversion"; // no-op
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if (gc == 1 && i == 1) {
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// This will cause GC to happen after we've allocated 1MB of metaspace objects
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// while processing the built-in SharedClassListFile.
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metaspaceSize = "-XX:MetaspaceSize=1M";
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}
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ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
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coop, ckls, metaspaceSize,
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"-XX:SharedArchiveFile=SharedArchiveFile" + i + ".jsa",
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"-Xshare:dump", "-Xlog:cds=debug");
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OutputAnalyzer out = CDSTestUtils.executeAndLog(pb, "SharedArchiveFile" + i);
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CDSTestUtils.checkDump(out);
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}
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compare("SharedArchiveFile0.jsa", "SharedArchiveFile1.jsa");
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}
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}
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}
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static void compare(String file0, String file1) throws Exception {
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byte[] buff0 = new byte[4096];
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byte[] buff1 = new byte[4096];
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try (FileInputStream in0 = new FileInputStream(file0);
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FileInputStream in1 = new FileInputStream(file1)) {
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int total = 0;
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while (true) {
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int n0 = read(in0, buff0);
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int n1 = read(in1, buff1);
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if (n0 != n1) {
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throw new RuntimeException("File contents (file sizes?) are different after " + total + " bytes; n0 = "
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+ n0 + ", n1 = " + n1);
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}
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if (n0 == 0) {
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System.out.println("File contents are the same: " + total + " bytes");
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break;
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}
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for (int i = 0; i < n0; i++) {
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byte b0 = buff0[i];
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byte b1 = buff1[i];
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if (b0 != b1) {
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throw new RuntimeException("File content different at byte #" + (total + i) + ", b0 = " + b0 + ", b1 = " + b1);
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}
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}
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total += n0;
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}
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}
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}
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static int read(FileInputStream in, byte[] buff) throws IOException {
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int total = 0;
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while (total < buff.length) {
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int n = in.read(buff, total, buff.length - total);
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if (n <= 0) {
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return total;
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}
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total += n;
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}
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return total;
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}
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}
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