591 lines
21 KiB
Java
591 lines
21 KiB
Java
/*
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* Copyright (c) 2018, 2020, Red Hat, Inc. All rights reserved.
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* Copyright (c) 2021, 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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* common code to run and validate tests of code generation for
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* volatile ops on AArch64
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*
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* incoming args are <testclass> <testtype>
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*
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* where <testclass> in {TestVolatileLoad,
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* TestVolatileStore,
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* TestUnsafeVolatileLoad,
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* TestUnsafeVolatileStore,
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* TestUnsafeVolatileCAS,
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* TestUnsafeVolatileWeakCAS,
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* TestUnsafeVolatileCAE,
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* TestUnsafeVolatileGAS}
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* and <testtype> in {G1,
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* Serial,
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* Parallel,
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* Shenandoah,
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* ShenandoahIU}
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*/
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package compiler.c2.aarch64;
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import java.util.List;
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import java.util.ListIterator;
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import java.util.Iterator;
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import java.util.regex.Pattern;
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import java.io.*;
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import jdk.test.lib.Asserts;
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import jdk.test.lib.compiler.InMemoryJavaCompiler;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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import sun.hotspot.WhiteBox;
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// runner class that spawns a new JVM to exercises a combination of
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// volatile MemOp and GC. The ops are compiled with the dmb -->
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// ldar/stlr transforms either enabled or disabled. this runner parses
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// the PrintOptoAssembly output checking that the generated code is
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// correct.
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public class TestVolatiles {
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public void runtest(String classname, String testType) throws Throwable {
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// n.b. clients omit the package name for the class
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String fullclassname = "compiler.c2.aarch64." + classname;
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// build up a command line for the spawned JVM
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String[] procArgs;
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int argcount;
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// add one or two extra arguments according to test type
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// i.e. GC type plus GC conifg
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switch(testType) {
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case "G1":
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argcount = 9;
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procArgs = new String[argcount];
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procArgs[argcount - 2] = "-XX:+UseG1GC";
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break;
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case "Parallel":
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argcount = 9;
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procArgs = new String[argcount];
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procArgs[argcount - 2] = "-XX:+UseParallelGC";
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break;
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case "Serial":
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argcount = 9;
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procArgs = new String[argcount];
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procArgs[argcount - 2] = "-XX:+UseSerialGC";
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break;
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case "Shenandoah":
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argcount = 10;
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procArgs = new String[argcount];
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procArgs[argcount - 3] = "-XX:+UnlockExperimentalVMOptions";
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procArgs[argcount - 2] = "-XX:+UseShenandoahGC";
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break;
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case "ShenandoahIU":
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argcount = 11;
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procArgs = new String[argcount];
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procArgs[argcount - 4] = "-XX:+UnlockExperimentalVMOptions";
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procArgs[argcount - 3] = "-XX:+UseShenandoahGC";
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procArgs[argcount - 2] = "-XX:ShenandoahGCMode=iu";
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break;
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default:
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throw new RuntimeException("unexpected test type " + testType);
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}
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// fill in arguments common to all cases
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// the first round of test enables transform of barriers to
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// use acquiring loads and releasing stores by setting arg
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// zero appropriately. this arg is reset in the second run to
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// disable the transform.
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procArgs[0] = "-XX:+UseCompressedOops";
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procArgs[1] = "-XX:-BackgroundCompilation";
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procArgs[2] = "-XX:-TieredCompilation";
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procArgs[3] = "-XX:+PrintOptoAssembly";
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procArgs[4] = "-XX:CompileCommand=compileonly," + fullclassname + "::" + "test*";
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procArgs[5] = "--add-exports";
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procArgs[6] = "java.base/jdk.internal.misc=ALL-UNNAMED";
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procArgs[argcount - 1] = fullclassname;
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runtest(classname, testType, true, procArgs);
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if (!classname.equals("TestUnsafeVolatileGAA")) {
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procArgs[0] = "-XX:-UseCompressedOops";
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runtest(classname, testType, false, procArgs);
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}
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}
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public void runtest(String classname, String testType, boolean useCompressedOops, String[] procArgs) throws Throwable {
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ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(procArgs);
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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output.stderrShouldBeEmptyIgnoreVMWarnings();
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output.stdoutShouldNotBeEmpty();
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output.shouldHaveExitValue(0);
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// check the output for the correct asm sequence as
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// appropriate to test class, test type and whether transform
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// was applied
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checkoutput(output, classname, testType, useCompressedOops);
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}
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// skip through output returning a line containing the desireed
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// substring or null
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private String skipTo(Iterator<String> iter, String substring)
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{
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while (iter.hasNext()) {
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String nextLine = iter.next();
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if (nextLine.matches(".*" + substring + ".*")) {
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return nextLine;
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}
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}
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return null;
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}
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// locate the start of compiler output for the desired method and
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// then check that each expected instruction occurs in the output
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// in the order supplied. throw an excpetion if not found.
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// n.b. the spawned JVM's output is included in the exception
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// message to make it easeir to identify what is missing.
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private boolean checkCompile(Iterator<String> iter, String methodname, String[] expected, OutputAnalyzer output, boolean do_throw)
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{
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// trace call to allow eyeball check of what we are checking against
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System.out.println("checkCompile(" + methodname + ",");
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String sepr = " { ";
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for (String s : expected) {
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System.out.print(sepr);
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System.out.print(s);
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sepr = ",\n ";
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}
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System.out.println(" })");
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// look for the start of an opto assembly print block
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String match = skipTo(iter, Pattern.quote("{method}"));
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if (match == null) {
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if (do_throw) {
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throw new RuntimeException("Missing compiler output for " + methodname + "!\n\n" + output.getOutput());
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}
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return false;
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}
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// check the compiled method name is right
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match = skipTo(iter, Pattern.quote("- name:"));
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if (match == null) {
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if (do_throw) {
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throw new RuntimeException("Missing compiled method name!\n\n" + output.getOutput());
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}
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return false;
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}
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if (!match.contains(methodname)) {
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if (do_throw) {
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throw new RuntimeException("Wrong method " + match + "!\n -- expecting " + methodname + "\n\n" + output.getOutput());
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}
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return false;
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}
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// make sure we can match each expected term in order
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for (String s : expected) {
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match = skipTo(iter, s);
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if (match == null) {
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if (do_throw) {
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throw new RuntimeException("Missing expected output " + s + "!\n\n" + output.getOutput());
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}
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return false;
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}
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}
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return true;
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}
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// check for expected asm output from a volatile load
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private void checkload(OutputAnalyzer output, String testType, boolean useCompressedOops) throws Throwable
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{
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Iterator<String> iter = output.asLines().listIterator();
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// we shoud see this same sequence for normal or unsafe volatile load
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// for both int and Object fields
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String[] matches;
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matches = new String[] {
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"ldarw",
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"membar_acquire \\(elided\\)",
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"ret"
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};
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checkCompile(iter, "testInt", matches, output, true);
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matches = new String[] {
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useCompressedOops ? "ldarw?" : "ldar",
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"membar_acquire \\(elided\\)",
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"ret"
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};
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checkCompile(iter, "testObj", matches, output, true);
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}
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// check for expected asm output from a volatile store
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private void checkstore(OutputAnalyzer output, String testType, boolean useCompressedOops) throws Throwable
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{
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Iterator<String> iter = output.asLines().listIterator();
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String[] matches;
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// non object stores are straightforward
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// this is the sequence of instructions for all cases
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matches = new String[] {
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"membar_release \\(elided\\)",
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"stlrw",
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"membar_volatile \\(elided\\)",
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"ret"
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};
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checkCompile(iter, "testInt", matches, output, true);
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// object stores will be as above except for when the GC
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// introduces barriers for card marking
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switch (testType) {
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default:
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// this is the basic sequence of instructions
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matches = new String[] {
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"membar_release \\(elided\\)",
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useCompressedOops ? "stlrw?" : "stlr",
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"membar_volatile \\(elided\\)",
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"ret"
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};
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break;
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case "G1":
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// a card mark volatile barrier should be generated
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// before the card mark strb
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//
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// following the fix for 8225776 the G1 barrier is now
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// scheduled out of line after the membar volatile and
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// and subsequent return
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matches = new String[] {
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"membar_release \\(elided\\)",
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useCompressedOops ? "stlrw?" : "stlr",
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"membar_volatile \\(elided\\)",
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"ret",
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"membar_volatile",
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"dmb ish",
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"strb"
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};
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break;
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case "Shenandoah":
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case "ShenandoahIU":
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// Shenandoah generates normal object graphs for
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// volatile stores
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matches = new String[] {
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"membar_release \\(elided\\)",
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useCompressedOops ? "stlrw?" : "stlr",
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"membar_volatile \\(elided\\)",
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"ret"
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};
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break;
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}
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checkCompile(iter, "testObj", matches, output, true);
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}
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// check for expected asm output from a volatile cas
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private void checkcas(OutputAnalyzer output, String testType, boolean useCompressedOops) throws Throwable
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{
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Iterator<String> iter = output.asLines().listIterator();
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String[] matches;
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String[][] tests = {
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{ "testInt", "cmpxchgw" },
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{ "testLong", "cmpxchg" },
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{ "testByte", "cmpxchgb" },
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{ "testShort", "cmpxchgs" },
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};
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for (String[] test : tests) {
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// non object stores are straightforward
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// this is the sequence of instructions for all cases
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matches = new String[] {
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"membar_release \\(elided\\)",
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test[1] + "_acq",
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"membar_acquire \\(elided\\)",
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"ret"
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};
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checkCompile(iter, test[0], matches, output, true);
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}
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// object stores will be as above except for when the GC
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// introduces barriers for card marking
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switch (testType) {
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default:
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// this is the basic sequence of instructions
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matches = new String[] {
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"membar_release \\(elided\\)",
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useCompressedOops ? "cmpxchgw?_acq" : "cmpxchg_acq",
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"strb",
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"membar_acquire \\(elided\\)",
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"ret"
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};
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break;
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case "G1":
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// a card mark volatile barrier should be generated
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// before the card mark strb
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//
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// following the fix for 8225776 the G1 barrier is now
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// scheduled out of line after the membar acquire and
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// and subsequent return
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matches = new String[] {
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"membar_release \\(elided\\)",
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useCompressedOops ? "cmpxchgw?_acq" : "cmpxchg_acq",
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"membar_acquire \\(elided\\)",
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"ret",
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"membar_volatile",
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"dmb ish",
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"strb"
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};
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break;
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case "Shenandoah":
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case "ShenandoahIU":
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// For volatile CAS, Shenanodoah generates normal
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// graphs with a shenandoah-specific cmpxchg
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matches = new String[] {
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"membar_release \\(elided\\)",
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useCompressedOops ? "cmpxchgw?_acq_shenandoah" : "cmpxchg_acq_shenandoah",
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"membar_acquire \\(elided\\)",
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"ret"
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};
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break;
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}
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checkCompile(iter, "testObj", matches, output, true);
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}
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private void checkcae(OutputAnalyzer output, String testType, boolean useCompressedOops) throws Throwable
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{
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ListIterator<String> iter = output.asLines().listIterator();
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String[] matches;
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String[][] tests = {
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{ "testInt", "cmpxchgw" },
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{ "testLong", "cmpxchg" },
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{ "testByte", "cmpxchgb" },
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{ "testShort", "cmpxchgs" },
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};
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for (String[] test : tests) {
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// non object stores are straightforward
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// this is the sequence of instructions for all cases
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matches = new String[] {
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"membar_release \\(elided\\)",
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test[1] + "_acq",
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"membar_acquire \\(elided\\)",
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"ret"
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};
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checkCompile(iter, test[0], matches, output, true);
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}
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// object stores will be as above except for when the GC
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// introduces barriers for card marking
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switch (testType) {
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default:
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// this is the basic sequence of instructions
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matches = new String[] {
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"membar_release \\(elided\\)",
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"strb",
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useCompressedOops ? "cmpxchgw?_acq" : "cmpxchg_acq",
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"membar_acquire \\(elided\\)",
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"ret"
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};
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// card marking store may be scheduled before or after
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// the cmpxchg so try both sequences.
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int idx = iter.nextIndex();
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if (!checkCompile(iter, "testObj", matches, output, false)) {
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iter = output.asLines().listIterator(idx);
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matches = new String[] {
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"membar_release \\(elided\\)",
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useCompressedOops ? "cmpxchgw?_acq" : "cmpxchg_acq",
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"strb",
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"membar_acquire \\(elided\\)",
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"ret"
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};
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checkCompile(iter, "testObj", matches, output, true);
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}
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return;
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case "G1":
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// a card mark volatile barrier should be generated
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// before the card mark strb
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//
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// following the fix for 8225776 the G1 barrier is now
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// scheduled out of line after the membar acquire and
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// and subsequent return
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matches = new String[] {
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"membar_release \\(elided\\)",
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useCompressedOops ? "cmpxchgw?_acq" : "cmpxchg_acq",
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"membar_acquire \\(elided\\)",
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"ret",
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"membar_volatile",
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"dmb ish",
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"strb"
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};
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break;
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case "Shenandoah":
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case "ShenandoahIU":
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// For volatile CAS, Shenanodoah generates normal
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// graphs with a shenandoah-specific cmpxchg
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matches = new String[] {
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"membar_release \\(elided\\)",
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useCompressedOops ? "cmpxchgw?_acq_shenandoah" : "cmpxchg_acq_shenandoah",
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"membar_acquire \\(elided\\)",
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"ret"
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};
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break;
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}
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checkCompile(iter, "testObj", matches, output, true);
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}
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private void checkgas(OutputAnalyzer output, String testType, boolean useCompressedOops) throws Throwable
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{
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Iterator<String> iter = output.asLines().listIterator();
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String[] matches;
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String[][] tests = {
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{ "testInt", "atomic_xchgw" },
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{ "testLong", "atomic_xchg" },
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};
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for (String[] test : tests) {
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// non object stores are straightforward
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// this is the sequence of instructions for all cases
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matches = new String[] {
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"membar_release \\(elided\\)",
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test[1] + "_acq",
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"membar_acquire \\(elided\\)",
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"ret"
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};
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checkCompile(iter, test[0], matches, output, true);
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}
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// object stores will be as above except for when the GC
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// introduces barriers for card marking
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switch (testType) {
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default:
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// this is the basic sequence of instructions
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matches = new String[] {
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"membar_release \\(elided\\)",
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useCompressedOops ? "atomic_xchgw?_acq" : "atomic_xchg_acq",
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"strb",
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"membar_acquire \\(elided\\)",
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"ret"
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};
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break;
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case "G1":
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// a card mark volatile barrier should be generated
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// before the card mark strb
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//
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// following the fix for 8225776 the G1 barrier is now
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// scheduled out of line after the membar acquire and
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// and subsequent return
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matches = new String[] {
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"membar_release \\(elided\\)",
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useCompressedOops ? "atomic_xchgw?_acq" : "atomic_xchg_acq",
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"membar_acquire \\(elided\\)",
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"ret",
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"membar_volatile",
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"dmb ish",
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"strb"
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};
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break;
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case "Shenandoah":
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case "ShenandoahIU":
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matches = new String[] {
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"membar_release \\(elided\\)",
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useCompressedOops ? "atomic_xchgw?_acq" : "atomic_xchg_acq",
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"membar_acquire \\(elided\\)",
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"ret"
|
|
};
|
|
break;
|
|
}
|
|
|
|
checkCompile(iter, "testObj", matches, output, true);
|
|
}
|
|
|
|
private void checkgaa(OutputAnalyzer output, String testType) throws Throwable
|
|
{
|
|
Iterator<String> iter = output.asLines().listIterator();
|
|
|
|
String[] matches;
|
|
String[][] tests = {
|
|
{ "testInt", "get_and_addI" },
|
|
{ "testLong", "get_and_addL" },
|
|
};
|
|
|
|
for (String[] test : tests) {
|
|
// non object stores are straightforward
|
|
// this is the sequence of instructions for all cases
|
|
matches = new String[] {
|
|
"membar_release \\(elided\\)",
|
|
test[1] + "_acq",
|
|
"membar_acquire \\(elided\\)",
|
|
"ret"
|
|
};
|
|
checkCompile(iter, test[0], matches, output, true);
|
|
}
|
|
|
|
}
|
|
|
|
// perform a check appropriate to the classname
|
|
|
|
private void checkoutput(OutputAnalyzer output, String classname, String testType, boolean useCompressedOops) throws Throwable
|
|
{
|
|
// trace call to allow eyeball check of what is being checked
|
|
System.out.println("checkoutput(" +
|
|
classname + ", " +
|
|
testType + ")\n" +
|
|
output.getOutput());
|
|
|
|
switch (classname) {
|
|
case "TestVolatileLoad":
|
|
checkload(output, testType, useCompressedOops);
|
|
break;
|
|
case "TestVolatileStore":
|
|
checkstore(output, testType, useCompressedOops);
|
|
break;
|
|
case "TestUnsafeVolatileLoad":
|
|
checkload(output, testType, useCompressedOops);
|
|
break;
|
|
case "TestUnsafeVolatileStore":
|
|
checkstore(output, testType, useCompressedOops);
|
|
break;
|
|
case "TestUnsafeVolatileCAS":
|
|
case "TestUnsafeVolatileWeakCAS":
|
|
checkcas(output, testType, useCompressedOops);
|
|
break;
|
|
case "TestUnsafeVolatileCAE":
|
|
checkcae(output, testType, useCompressedOops);
|
|
break;
|
|
case "TestUnsafeVolatileGAS":
|
|
checkgas(output, testType, useCompressedOops);
|
|
break;
|
|
case "TestUnsafeVolatileGAA":
|
|
checkgaa(output, testType);
|
|
break;
|
|
}
|
|
}
|
|
}
|