219 lines
8.7 KiB
Java
219 lines
8.7 KiB
Java
/*
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* Copyright Amazon.com Inc. 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 TestOnSpinWaitAArch64
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* @summary Checks that java.lang.Thread.onSpinWait is intrinsified with instructions specified with '-XX:OnSpinWaitInst' and '-XX:OnSpinWaitInstCount'
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* @bug 8186670
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* @library /test/lib
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*
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* @requires vm.flagless
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* @requires os.arch=="aarch64"
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*
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* @run driver compiler.onSpinWait.TestOnSpinWaitAArch64 c2 nop 7
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* @run driver compiler.onSpinWait.TestOnSpinWaitAArch64 c2 isb 3
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* @run driver compiler.onSpinWait.TestOnSpinWaitAArch64 c2 yield 1
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* @run driver compiler.onSpinWait.TestOnSpinWaitAArch64 c1 nop 7
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* @run driver compiler.onSpinWait.TestOnSpinWaitAArch64 c1 isb 3
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* @run driver compiler.onSpinWait.TestOnSpinWaitAArch64 c1 yield
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*/
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package compiler.onSpinWait;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.ListIterator;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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public class TestOnSpinWaitAArch64 {
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public static void main(String[] args) throws Exception {
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String compiler = args[0];
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String spinWaitInst = args[1];
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String spinWaitInstCount = (args.length == 3) ? args[2] : "1";
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ArrayList<String> command = new ArrayList<String>();
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command.add("-XX:+IgnoreUnrecognizedVMOptions");
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command.add("-showversion");
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command.add("-XX:-BackgroundCompilation");
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command.add("-XX:+UnlockDiagnosticVMOptions");
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command.add("-XX:+PrintAssembly");
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if (compiler.equals("c2")) {
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command.add("-XX:-TieredCompilation");
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} else if (compiler.equals("c1")) {
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command.add("-XX:+TieredCompilation");
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command.add("-XX:TieredStopAtLevel=1");
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} else {
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throw new RuntimeException("Unknown compiler: " + compiler);
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}
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command.add("-Xbatch");
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command.add("-XX:OnSpinWaitInst=" + spinWaitInst);
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command.add("-XX:OnSpinWaitInstCount=" + spinWaitInstCount);
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command.add("-XX:CompileCommand=compileonly," + Launcher.class.getName() + "::" + "test");
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command.add(Launcher.class.getName());
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(command);
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OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());
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analyzer.shouldHaveExitValue(0);
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System.out.println(analyzer.getOutput());
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checkOutput(analyzer, spinWaitInst, Integer.parseInt(spinWaitInstCount));
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}
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private static String getSpinWaitInstHex(String spinWaitInst) {
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if ("nop".equals(spinWaitInst)) {
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return "1f20 03d5";
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} else if ("isb".equals(spinWaitInst)) {
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return "df3f 03d5";
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} else if ("yield".equals(spinWaitInst)) {
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return "3f20 03d5";
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} else {
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throw new RuntimeException("Unknown spin wait instruction: " + spinWaitInst);
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}
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}
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private static void addInstrs(String line, ArrayList<String> instrs) {
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for (String instr : line.split("\\|")) {
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instrs.add(instr.trim());
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}
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}
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// The expected output of PrintAssembly for example for a spin wait with three NOPs:
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//
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// # {method} {0x0000ffff6ac00370} 'test' '()V' in 'compiler/onSpinWait/TestOnSpinWaitAArch64$Launcher'
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// # [sp+0x40] (sp of caller)
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// 0x0000ffff9d557680: 1f20 03d5 | e953 40d1 | 3f01 00f9 | ff03 01d1 | fd7b 03a9 | 1f20 03d5 | 1f20 03d5
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//
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// 0x0000ffff9d5576ac: ;*invokestatic onSpinWait {reexecute=0 rethrow=0 return_oop=0}
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// ; - compiler.onSpinWait.TestOnSpinWaitAArch64$Launcher::test@0 (line 161)
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// 0x0000ffff9d5576ac: 1f20 03d5 | fd7b 43a9 | ff03 0191
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//
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// The checkOutput method adds hex instructions before 'invokestatic onSpinWait' and from the line after
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// it to a list. The list is traversed from the end to count spin wait instructions.
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//
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// If JVM finds the hsdis library the output is like:
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//
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// # {method} {0x0000ffff63000370} 'test' '()V' in 'compiler/onSpinWait/TestOnSpinWaitAArch64$Launcher'
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// # [sp+0x20] (sp of caller)
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// 0x0000ffffa409da80: nop
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// 0x0000ffffa409da84: sub sp, sp, #0x20
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// 0x0000ffffa409da88: stp x29, x30, [sp, #16] ;*synchronization entry
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// ; - compiler.onSpinWait.TestOnSpinWaitAArch64$Launcher::test@-1 (line 187)
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// 0x0000ffffa409da8c: nop
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// 0x0000ffffa409da90: nop
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// 0x0000ffffa409da94: nop
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// 0x0000ffffa409da98: nop
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// 0x0000ffffa409da9c: nop
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// 0x0000ffffa409daa0: nop
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// 0x0000ffffa409daa4: nop ;*invokestatic onSpinWait {reexecute=0 rethrow=0 return_oop=0}
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// ; - compiler.onSpinWait.TestOnSpinWaitAArch64$Launcher::test@0 (line 187)
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private static void checkOutput(OutputAnalyzer output, String spinWaitInst, int spinWaitInstCount) {
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Iterator<String> iter = output.asLines().listIterator();
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String match = skipTo(iter, "'test' '()V' in 'compiler/onSpinWait/TestOnSpinWaitAArch64$Launcher'");
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if (match == null) {
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throw new RuntimeException("Missing compiler output for the method compiler.onSpinWait.TestOnSpinWaitAArch64$Launcher::test");
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}
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ArrayList<String> instrs = new ArrayList<String>();
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String line = null;
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boolean hasHexInstInOutput = false;
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while (iter.hasNext()) {
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line = iter.next();
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if (line.contains("*invokestatic onSpinWait")) {
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break;
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}
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if (!hasHexInstInOutput) {
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hasHexInstInOutput = line.contains("|");
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}
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if (line.contains("0x") && !line.contains(";")) {
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addInstrs(line, instrs);
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}
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}
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if (!iter.hasNext() || !iter.next().contains("- compiler.onSpinWait.TestOnSpinWaitAArch64$Launcher::test@0") || !iter.hasNext()) {
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throw new RuntimeException("Missing compiler output for Thread.onSpinWait intrinsic");
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}
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String strToSearch = null;
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if (!hasHexInstInOutput) {
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instrs.add(line.split(";")[0].trim());
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strToSearch = spinWaitInst;
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} else {
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line = iter.next();
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if (!line.contains("0x") || line.contains(";")) {
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throw new RuntimeException("Expected hex instructions");
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}
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addInstrs(line, instrs);
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strToSearch = getSpinWaitInstHex(spinWaitInst);
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}
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int foundInstCount = 0;
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ListIterator<String> instrReverseIter = instrs.listIterator(instrs.size());
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while (instrReverseIter.hasPrevious()) {
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if (instrReverseIter.previous().endsWith(strToSearch)) {
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foundInstCount = 1;
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break;
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}
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}
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while (instrReverseIter.hasPrevious()) {
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if (!instrReverseIter.previous().endsWith(strToSearch)) {
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break;
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}
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++foundInstCount;
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}
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if (foundInstCount != spinWaitInstCount) {
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throw new RuntimeException("Wrong instruction " + strToSearch + " count " + foundInstCount + "!\n -- expecting " + spinWaitInstCount);
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}
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}
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private static String skipTo(Iterator<String> iter, String substring) {
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while (iter.hasNext()) {
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String nextLine = iter.next();
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if (nextLine.contains(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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static class Launcher {
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public static void main(final String[] args) throws Exception {
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int end = 20_000;
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for (int i=0; i < end; i++) {
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test();
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}
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}
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static void test() {
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java.lang.Thread.onSpinWait();
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}
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}
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}
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