| /* |
| * Copyright (c) 2013, 2021, 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 |
| * @bug 8024927 |
| * @summary Testing address of compressed class pointer space as best as possible. |
| * @requires vm.bits == 64 & !vm.graal.enabled |
| * @requires vm.flagless |
| * @comment Testing compressed class pointers without compressed oops is not possible |
| * on MacOS because the heap is given an arbitrary address that occasionally |
| * collides with where we would ideally have placed the compressed class space. |
| * @requires os.family != "mac" |
| * @library /test/lib |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * @run driver CompressedClassPointers |
| */ |
| |
| import jdk.test.lib.Platform; |
| import jdk.test.lib.process.ProcessTools; |
| import jdk.test.lib.process.OutputAnalyzer; |
| import jtreg.SkippedException; |
| |
| public class CompressedClassPointers { |
| |
| static final String logging_option = "-Xlog:gc+metaspace=trace,cds=trace"; |
| |
| // Returns true if we are to test the narrow klass base; we only do this on |
| // platforms where we can be reasonably shure that we get reproducable placement). |
| static boolean testNarrowKlassBase() { |
| if (Platform.isWindows()) { |
| return false; |
| } |
| return true; |
| |
| } |
| |
| // CDS off, small heap, ccs size default (1G) |
| // A small heap should allow us to place the ccs within the lower 32G and thus allow zero based encoding. |
| public static void smallHeapTest() throws Exception { |
| ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:SharedBaseAddress=8g", |
| "-Xmx128m", |
| logging_option, |
| "-Xshare:off", |
| "-XX:+VerifyBeforeGC", "-version"); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| if (testNarrowKlassBase()) { |
| output.shouldContain("Narrow klass base: 0x0000000000000000"); |
| } |
| output.shouldHaveExitValue(0); |
| } |
| |
| // CDS off, small heap, ccs size explicitely set to 1G |
| // A small heap should allow us to place the ccs within the lower 32G and thus allow zero based encoding. |
| public static void smallHeapTestWith1G() throws Exception { |
| ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:CompressedClassSpaceSize=1g", |
| "-Xmx128m", |
| logging_option, |
| "-Xshare:off", |
| "-XX:+VerifyBeforeGC", "-version"); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| if (testNarrowKlassBase()) { |
| output.shouldContain("Narrow klass base: 0x0000000000000000, Narrow klass shift: 3"); |
| } |
| output.shouldHaveExitValue(0); |
| } |
| |
| // CDS off, a very large heap, ccs size left to 1G default. |
| // We expect the ccs to be mapped somewhere far beyond the heap, such that it is not possible |
| // to use zero based encoding. |
| public static void largeHeapTest() throws Exception { |
| ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:+UnlockExperimentalVMOptions", |
| "-Xmx30g", |
| logging_option, |
| "-Xshare:off", |
| "-XX:+VerifyBeforeGC", "-version"); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| if (testNarrowKlassBase() && !Platform.isPPC() && !Platform.isOSX()) { |
| // PPC: in most cases the heap cannot be placed below 32g so there |
| // is room for ccs and narrow klass base will be 0x0. Exception: |
| // Linux 4.1.42 or earlier (see ELF_ET_DYN_BASE in JDK-8244847). |
| // For simplicity we exclude PPC. |
| // OSX: similar. |
| output.shouldNotContain("Narrow klass base: 0x0000000000000000"); |
| output.shouldContain("Narrow klass shift: 0"); |
| } |
| output.shouldHaveExitValue(0); |
| } |
| |
| // Settings as in largeHeapTest() except for max heap size. We make max heap |
| // size even larger such that it cannot fit into lower 32G but not too large |
| // for compressed oops. |
| // We expect a zerobased ccs. |
| public static void largeHeapAbove32GTest() throws Exception { |
| ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:+UnlockExperimentalVMOptions", |
| "-Xmx31g", |
| logging_option, |
| "-Xshare:off", |
| "-XX:+VerifyBeforeGC", "-version"); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| if (testNarrowKlassBase()) { |
| if (!(Platform.isAArch64() && Platform.isOSX())) { // see JDK-8262895 |
| output.shouldContain("Narrow klass base: 0x0000000000000000"); |
| if (!Platform.isAArch64() && !Platform.isPPC() && !Platform.isOSX()) { |
| output.shouldContain("Narrow klass shift: 0"); |
| } |
| } |
| } |
| output.shouldHaveExitValue(0); |
| } |
| |
| // Using large paged heap, metaspace uses small pages. |
| public static void largePagesForHeapTest() throws Exception { |
| ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-Xmx128m", |
| "-XX:+UseLargePages", |
| logging_option, |
| "-XX:+VerifyBeforeGC", "-version"); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| if (testNarrowKlassBase()) { |
| output.shouldContain("Narrow klass base:"); |
| } |
| output.shouldHaveExitValue(0); |
| } |
| |
| public static void heapBaseMinAddressTest() throws Exception { |
| ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:HeapBaseMinAddress=1m", |
| "-Xlog:gc+heap+coops=debug", |
| "-version"); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| output.shouldContain("HeapBaseMinAddress must be at least"); |
| output.shouldHaveExitValue(0); |
| } |
| |
| public static void sharingTest() throws Exception { |
| // Test small heaps |
| ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:SharedArchiveFile=./CompressedClassPointers.jsa", |
| "-Xmx128m", |
| "-XX:SharedBaseAddress=8g", |
| "-XX:+VerifyBeforeGC", |
| "-Xshare:dump", |
| "-Xlog:cds,gc+heap+coops=debug"); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| if (output.firstMatch("Shared spaces are not supported in this VM") != null) { |
| return; |
| } |
| try { |
| output.shouldContain("Loading classes to share"); |
| output.shouldHaveExitValue(0); |
| |
| pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:SharedArchiveFile=./CompressedClassPointers.jsa", |
| "-Xmx128m", |
| "-XX:SharedBaseAddress=8g", |
| "-Xlog:gc+heap+coops=debug", |
| "-Xshare:on", |
| "-version"); |
| output = new OutputAnalyzer(pb.start()); |
| output.shouldContain("sharing"); |
| output.shouldHaveExitValue(0); |
| |
| } catch (RuntimeException e) { |
| output.shouldContain("Unable to use shared archive"); |
| output.shouldHaveExitValue(1); |
| } |
| } |
| |
| public static void smallHeapTestNoCoop() throws Exception { |
| ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:-UseCompressedOops", |
| "-XX:+UseCompressedClassPointers", |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:SharedBaseAddress=8g", |
| "-Xmx128m", |
| "-Xlog:gc+metaspace=trace", |
| "-Xshare:off", |
| "-Xlog:cds=trace", |
| "-XX:+VerifyBeforeGC", "-version"); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| output.shouldContain("Narrow klass base: 0x0000000000000000"); |
| output.shouldHaveExitValue(0); |
| } |
| |
| public static void smallHeapTestWith1GNoCoop() throws Exception { |
| ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:-UseCompressedOops", |
| "-XX:+UseCompressedClassPointers", |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:CompressedClassSpaceSize=1g", |
| "-Xmx128m", |
| "-Xlog:gc+metaspace=trace", |
| "-Xshare:off", |
| "-Xlog:cds=trace", |
| "-XX:+VerifyBeforeGC", "-version"); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| output.shouldContain("Narrow klass base: 0x0000000000000000"); |
| if (!Platform.isAArch64() && !Platform.isPPC()) { |
| // Currently relax this test for Aarch64 and ppc. |
| output.shouldContain("Narrow klass shift: 0"); |
| } |
| output.shouldHaveExitValue(0); |
| } |
| |
| public static void largeHeapTestNoCoop() throws Exception { |
| ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:-UseCompressedOops", |
| "-XX:+UseCompressedClassPointers", |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:+UnlockExperimentalVMOptions", |
| "-Xmx30g", |
| "-Xlog:gc+metaspace=trace", |
| "-Xshare:off", |
| "-Xlog:cds=trace", |
| "-XX:+VerifyBeforeGC", "-version"); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| output.shouldContain("Narrow klass base: 0x0000000000000000"); |
| if (!Platform.isAArch64() && !Platform.isPPC()) { |
| // Currently relax this test for Aarch64 and ppc. |
| output.shouldContain("Narrow klass shift: 0"); |
| } |
| output.shouldHaveExitValue(0); |
| } |
| |
| public static void largePagesTestNoCoop() throws Exception { |
| ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:-UseCompressedOops", |
| "-XX:+UseCompressedClassPointers", |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-Xmx128m", |
| "-XX:+UseLargePages", |
| "-Xlog:gc+metaspace=trace", |
| "-XX:+VerifyBeforeGC", "-version"); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| output.shouldContain("Narrow klass base:"); |
| output.shouldHaveExitValue(0); |
| } |
| |
| public static void heapBaseMinAddressTestNoCoop() throws Exception { |
| ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:-UseCompressedOops", |
| "-XX:+UseCompressedClassPointers", |
| "-XX:HeapBaseMinAddress=1m", |
| "-Xlog:gc+heap+coops=debug", |
| "-version"); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| output.shouldContain("HeapBaseMinAddress must be at least"); |
| output.shouldHaveExitValue(0); |
| } |
| |
| public static void sharingTestNoCoop() throws Exception { |
| // Test small heaps |
| ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:-UseCompressedOops", |
| "-XX:+UseCompressedClassPointers", |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:SharedArchiveFile=./CompressedClassPointers.jsa", |
| "-Xmx128m", |
| "-XX:SharedBaseAddress=8g", |
| "-XX:+VerifyBeforeGC", |
| "-Xshare:dump", |
| "-Xlog:cds,gc+heap+coops=debug"); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| if (output.firstMatch("Shared spaces are not supported in this VM") != null) { |
| return; |
| } |
| try { |
| output.shouldContain("Loading classes to share"); |
| output.shouldHaveExitValue(0); |
| |
| pb = ProcessTools.createLimitedTestJavaProcessBuilder( |
| "-XX:-UseCompressedOops", |
| "-XX:+UseCompressedClassPointers", |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:SharedArchiveFile=./CompressedClassPointers.jsa", |
| "-Xmx128m", |
| "-XX:SharedBaseAddress=8g", |
| "-Xlog:gc+heap+coops=debug", |
| "-Xshare:on", |
| "-version"); |
| output = new OutputAnalyzer(pb.start()); |
| output.shouldContain("sharing"); |
| output.shouldHaveExitValue(0); |
| |
| } catch (RuntimeException e) { |
| output.shouldContain("Unable to use shared archive"); |
| output.shouldHaveExitValue(1); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| smallHeapTest(); |
| smallHeapTestWith1G(); |
| largeHeapTest(); |
| largeHeapAbove32GTest(); |
| largePagesForHeapTest(); |
| heapBaseMinAddressTest(); |
| sharingTest(); |
| |
| smallHeapTestNoCoop(); |
| smallHeapTestWith1GNoCoop(); |
| largeHeapTestNoCoop(); |
| largePagesTestNoCoop(); |
| heapBaseMinAddressTestNoCoop(); |
| sharingTestNoCoop(); |
| } |
| } |
