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105 lines
4.2 KiB
Java
105 lines
4.2 KiB
Java
/*
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* Copyright (c) 2025, 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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* @test
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* @bug 8361842
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* @summary Verify the effectiveness of intrinsics range and limit checks
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* (bypassing `StringCoding::encodeAsciiArray`, and) feeding
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* invalid input to an intrinsified `StringCoding::encodeAsciiArray0`
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* (note the `0` suffix!).
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* @library /compiler/patches
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* @library /test/lib
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* @build java.base/java.lang.Helper
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* @comment `vm.debug == true` is required since redundant intrinsics checks
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* are only added in debug builds
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* @requires vm.debug == true & vm.flavor == "server" & !vm.graal.enabled
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* @requires (os.arch != "riscv64" | (os.arch == "riscv64" & vm.cpu.features ~= ".*rvv.*"))
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* @run main/othervm compiler.intrinsics.TestVerifyIntrinsicChecks verify
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*/
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package compiler.intrinsics;
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import java.lang.Helper;
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import java.time.Instant;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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public final class TestVerifyIntrinsicChecks {
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public static void main(String[] args) throws Exception {
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switch (args[0]) {
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case "verify" -> {
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log("Starting JVM in a separate process to verify the crash");
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OutputAnalyzer outputAnalyzer = ProcessTools.executeTestJava(
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"-Xcomp",
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"-XX:-TieredCompilation",
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"-XX:CompileCommand=inline,java.lang.StringCoding::encodeAsciiArray0",
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"--patch-module", "java.base=%s/java.base".formatted(System.getProperty("test.patch.path")),
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"compiler.intrinsics.TestVerifyIntrinsicChecks",
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"crash");
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outputAnalyzer.shouldContain("unexpected null in intrinsic");
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outputAnalyzer.shouldNotHaveExitValue(0);
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}
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case "crash" -> {
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log("Triggering the crash");
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warmUpIntrinsicMethod();
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violateIntrinsicMethodContract();
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}
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default -> throw new IllegalArgumentException();
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}
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}
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private static void warmUpIntrinsicMethod() {
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log("Warming up the intrinsic method");
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char[] sa = createAsciiChars(8192);
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byte[] sp = new byte[4096];
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for (int i = 0; i < 1_000; i++) {
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Helper.StringCodingEncodeAsciiArray0(sa, i, sp, 0, sp.length - i);
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}
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}
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private static char[] createAsciiChars(int length) {
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char[] buffer = new char[length];
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for (int i = 0; i < length; i++) {
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buffer[i] = (char) (i % '\u0080');
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}
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return buffer;
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}
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private static void violateIntrinsicMethodContract() {
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log("Violating the intrinsic method contract (sa=null)");
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Helper.StringCodingEncodeAsciiArray0(null, 1, null, 1, 1);
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}
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private synchronized static void log(String format, Object... args) {
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Object[] extendedArgs = new Object[2 + args.length];
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extendedArgs[0] = Instant.now();
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extendedArgs[1] = Thread.currentThread().getName();
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System.arraycopy(args, 0, extendedArgs, extendedArgs.length - args.length, args.length);
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String extendedFormat = "%%s [%%s] %s%%n".formatted(format);
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System.out.printf(extendedFormat, extendedArgs);
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}
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}
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