--- a/test/hotspot/jtreg/runtime/SharedArchiveFile/serviceability/ReplaceCriticalClasses.java Mon Jul 29 09:57:37 2019 -0400
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,242 +0,0 @@
-/*
- * Copyright (c) 2018, 2019, 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
- * @summary Tests how CDS works when critical library classes are replaced with JVMTI ClassFileLoadHook
- * @library /test/lib
- * @requires vm.cds
- * @build sun.hotspot.WhiteBox
- * @run driver ClassFileInstaller -jar whitebox.jar sun.hotspot.WhiteBox
- * @run main/othervm/native ReplaceCriticalClasses
- */
-
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-import jdk.test.lib.cds.CDSTestUtils;
-import jdk.test.lib.cds.CDSOptions;
-import jdk.test.lib.process.OutputAnalyzer;
-import sun.hotspot.WhiteBox;
-
-public class ReplaceCriticalClasses {
- public static void main(String args[]) throws Throwable {
- ReplaceCriticalClasses rcc = new ReplaceCriticalClasses();
- rcc.process(args);
- }
-
- public void process(String args[]) throws Throwable {
- if (args.length == 0) {
- // Dump the shared archive in case it was not generated during the JDK build.
- // Put the archive at separate file to avoid clashes with concurrent tests.
- CDSOptions opts = new CDSOptions()
- .setXShareMode("dump")
- .setArchiveName(ReplaceCriticalClasses.class.getName() + ".jsa")
- .setUseVersion(false)
- .addSuffix("-showversion");
- CDSTestUtils.run(opts).assertNormalExit("");
-
- launchChildProcesses(getTests());
- } else if (args.length == 3 && args[0].equals("child")) {
- Class klass = Class.forName(args[2].replace("/", "."));
- if (args[1].equals("-shared")) {
- testInChild(true, klass);
- } else if (args[1].equals("-notshared")) {
- testInChild(false, klass);
- } else {
- throw new RuntimeException("Unknown child exec option " + args[1]);
- }
- return;
- } else {
- throw new RuntimeException("Usage: @run main/othervm/native ReplaceCriticalClasses");
- }
- }
-
- public String[] getTests() {
- String tests[] = {
- // CDS should be disabled -- these critical classes will be replaced
- // because JvmtiExport::early_class_hook_env() is true.
- "-early -notshared java/lang/Object",
- "-early -notshared java/lang/String",
- "-early -notshared java/lang/Cloneable",
- "-early -notshared java/io/Serializable",
-
- // CDS should not be disabled -- these critical classes cannot be replaced because
- // JvmtiExport::early_class_hook_env() is false.
- "java/lang/Object",
- "java/lang/String",
- "java/lang/Cloneable",
- "java/io/Serializable",
-
- /* Try to replace classes that are used by the archived subgraph graphs.
- The following test cases are in ReplaceCriticalClassesForSubgraphs.java.
- "-early -notshared -subgraph java/lang/module/ResolvedModule jdk.internal.module.ArchivedModuleGraph",
- "-early -notshared -subgraph java/lang/Long java.lang.Long$LongCache",
- "-subgraph java/lang/Long java.lang.Long$LongCache",
- */
-
- // Replace classes that are loaded after JVMTI_PHASE_PRIMORDIAL. It's OK to replace
- // such
- // classes even when CDS is enabled. Nothing bad should happen.
- "-notshared java/util/Locale",
- "-notshared sun/util/locale/BaseLocale",
- "-notshared java/lang/Readable",
- };
- return tests;
- }
-
- static void launchChildProcesses(String tests[]) throws Throwable {
- int n = 0;
- for (String s : tests) {
- System.out.println("Test case[" + (n++) + "] = \"" + s + "\"");
- String args[] = s.split("\\s+"); // split by space character
- launchChild(args);
- }
- }
-
- static void launchChild(String args[]) throws Throwable {
- if (args.length < 1) {
- throw new RuntimeException("Invalid test case. Should be <-early> <-subgraph> <-notshared> klassName subgraphKlass");
- }
- String klassName = null;
- String subgraphKlass = null;
- String early = "";
- boolean subgraph = false;
- String shared = "-shared";
-
- for (int i=0; i<args.length-1; i++) {
- String opt = args[i];
- if (opt.equals("-early")) {
- early = "-early,";
- } else if (opt.equals("-subgraph")) {
- subgraph = true;
- } else if (opt.equals("-notshared")) {
- shared = opt;
- } else {
- if (!subgraph) {
- throw new RuntimeException("Unknown option: " + opt);
- }
- }
- }
- if (subgraph) {
- klassName = args[args.length-2];
- subgraphKlass = args[args.length-1];
- } else {
- klassName = args[args.length-1];
- }
- Class.forName(klassName.replace("/", ".")); // make sure it's a valid class
- final String subgraphInit = "initialize_from_archived_subgraph " + subgraphKlass;
-
- // We will pass an option like "-agentlib:SimpleClassFileLoadHook=java/util/Locale,XXX,XXX".
- // The SimpleClassFileLoadHook agent would attempt to hook the java/util/Locale class
- // but leave the class file bytes unchanged (it replaces all bytes "XXX" with "XXX", i.e.,
- // a no-op). JVMTI doesn't check the class file bytes returned by the agent, so as long
- // as the agent returns a buffer, it will not load the class from CDS, and will instead
- // load the class by parsing the buffer.
- //
- // Note that for safety we don't change the contents of the class file bytes. If in the
- // future JVMTI starts checking the contents of the class file bytes, this test would need
- // to be updated. (You'd see the test case with java/util/Locale staring to fail).
- String agent = "-agentlib:SimpleClassFileLoadHook=" + early + klassName + ",XXX,XXX";
-
- CDSOptions opts = (new CDSOptions())
- .setXShareMode("auto")
- .setArchiveName(ReplaceCriticalClasses.class.getName() + ".jsa")
- .setUseVersion(false)
- .addSuffix("-showversion",
- "-Xlog:cds",
- "-XX:+UnlockDiagnosticVMOptions",
- agent,
- "-XX:+WhiteBoxAPI",
- "-Xbootclasspath/a:" + ClassFileInstaller.getJarPath("whitebox.jar"));
-
- if (subgraph) {
- opts.addSuffix("-Xlog:cds,cds+heap");
- }
-
- opts.addSuffix("ReplaceCriticalClasses",
- "child",
- shared,
- klassName);
-
- final boolean expectDisable = !early.equals("");
- final boolean checkSubgraph = subgraph;
- final boolean expectShared = shared.equals("-shared");
- CDSTestUtils.run(opts).assertNormalExit(out -> {
- if (expectDisable) {
- out.shouldContain("UseSharedSpaces: CDS is disabled because early JVMTI ClassFileLoadHook is in use.");
- System.out.println("CDS disabled as expected");
- }
- if (checkSubgraph) {
- if (expectShared) {
- if (!out.getOutput().contains("UseSharedSpaces: Unable to map at required address in java heap")) {
- out.shouldContain(subgraphInit);
- }
- } else {
- out.shouldNotContain(subgraphInit);
- }
- }
- });
- }
-
- static void testInChild(boolean shouldBeShared, Class klass) {
- WhiteBox wb = WhiteBox.getWhiteBox();
-
- if (shouldBeShared && !wb.isSharedClass(klass)) {
- throw new RuntimeException(klass + " should be shared but but actually is not.");
- }
- if (!shouldBeShared && wb.isSharedClass(klass)) {
- throw new RuntimeException(klass + " should not be shared but actually is.");
- }
- System.out.println("wb.isSharedClass(klass): " + wb.isSharedClass(klass) + " == " + shouldBeShared);
-
- String strings[] = {
- // interned strings from j.l.Object
- "@",
- "nanosecond timeout value out of range",
- "timeoutMillis value is negative",
-
- // interned strings from j.l.Integer
- "0",
- "0X",
- "0x",
- "int"
- };
-
- // Make sure the interned string table is same
- for (String s : strings) {
- String i = s.intern();
- if (s != i) {
- throw new RuntimeException("Interned string mismatch: \"" + s + "\" @ " + System.identityHashCode(s) +
- " vs \"" + i + "\" @ " + System.identityHashCode(i));
- }
- }
- // We have tried to use ClassFileLoadHook to replace critical library classes (which may
- // may not have succeeded, depending on whether the agent has requested
- // can_generate_all_class_hook_events/can_generate_early_class_hook_events capabilities).
- //
- // In any case, the JVM should have started properly (perhaps with CDS disabled) and
- // the above operations should succeed.
- System.out.println("If I can come to here without crashing, things should be OK");
- }
-}