jdk-24/test/hotspot/jtreg/runtime/memory/ReserveMemory.java

/*
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 * 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
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 *
 * 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).
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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// Aix commits on touch, so this test won't work.
/*
 * @test
 * @bug 8012015
 * @requires !(os.family == "aix")
 * @requires vm.flagless
 * @summary Make sure reserved (but uncommitted) memory is not accessible
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.management
 * @build jdk.test.whitebox.WhiteBox
 * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
 * @run driver ReserveMemory
 */

import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.Platform;

import jdk.test.whitebox.WhiteBox;

public class ReserveMemory {
  public static void main(String args[]) throws Exception {
    if (args.length > 0) {
      // expected to crash
      WhiteBox.getWhiteBox().readReservedMemory();
    } else {
      ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
            "-Xbootclasspath/a:.",
            "-XX:+UnlockDiagnosticVMOptions",
            "-XX:+WhiteBoxAPI",
            "-XX:-CreateCoredumpOnCrash",
            "-Xmx128m",
            "ReserveMemory",
            "test");

      OutputAnalyzer output = new OutputAnalyzer(pb.start());
      output.shouldNotHaveExitValue(0);
      if (Platform.isWindows()) {
        output.shouldContain("EXCEPTION_ACCESS_VIOLATION");
      } else if (Platform.isOSX()) {
        output.shouldContain("SIGBUS");
      } else {
        output.shouldContain("SIGSEGV");
      }
    }
  }
}