diff --git a/EnvVarOptionsTest.java b/EnvVarOptionsTest.java new file mode 100644 index 0000000..b538dcf --- /dev/null +++ b/EnvVarOptionsTest.java @@ -0,0 +1,85 @@ +/* + * Copyright (c) 2021, 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 + * @bug 8288483 + * @summary Test that JAVA_TOOL_OPTIONS variable are hanled corectly ever if they exceed 1024 bytes + * @library /testlibrary + * @run driver EnvVarOptionsTest + */ + +import java.io.PrintWriter; +import java.lang.management.ManagementFactory; +import java.lang.management.MemoryPoolMXBean; +import java.util.NoSuchElementException; + +import com.oracle.java.testlibrary.ProcessTools; +import com.oracle.java.testlibrary.OutputAnalyzer; + +public class EnvVarOptionsTest { + + /* Put more than 64 options to command line */ + public static String CreateOptionsString(int items) { + StringBuilder vm_flags = new StringBuilder(); + for (int i = 0; i < items; ++i) { + vm_flags.append(" -XX:+BO" + i); + } + return vm_flags.toString(); + } + + public static void runJavaWithOptions(String flags) throws Exception { + ProcessBuilder pb = null; + OutputAnalyzer output = null; + + String[] envVars = { + "_JAVA_OPTIONS", + "JAVA_TOOL_OPTIONS" + }; + + for (String envVar : envVars) { + System.out.println("Test " + envVar + " env-var"); + pb = ProcessTools.createJavaProcessBuilder("-XX:+PrintVMOptions", + "-XX:+IgnoreUnrecognizedVMOptions", "-version"); + pb.environment().put(envVar, flags); + output = new OutputAnalyzer(pb.start()); + output.shouldContain("VM option '+BO66'"); + output.shouldHaveExitValue(0); + output.reportDiagnosticSummary(); + } + } + + public static void main(String... args) throws Exception { + // JVM will report + // [Picked up _JAVA_OPTIONS: -XX:+BO0 ... -XX:+BO66] + // But only first 64 options are actually picked because of + // the hardcoded HotSpot limit + String flags = CreateOptionsString(67); + runJavaWithOptions(flags); + + // JVM will ignore the variable + // with no clue of what is happening + flags = CreateOptionsString(1024); + runJavaWithOptions(flags); + } +}