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