84 lines
3.0 KiB
Java
84 lines
3.0 KiB
Java
/*
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* Copyright (c) 2018, 2022, 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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* @summary Test that os::attempt_reserve_memory_at doesn't register the memory as committed
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* java.management
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail VirtualAllocAttemptReserveMemoryAt
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*
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*/
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.JDKToolFinder;
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import jdk.test.whitebox.WhiteBox;
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import static jdk.test.lib.Asserts.*;
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public class VirtualAllocAttemptReserveMemoryAt {
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public static WhiteBox wb = WhiteBox.getWhiteBox();
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public static void main(String args[]) throws Exception {
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long reserveSize = 4 * 1024 * 1024; // 4096KB
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String pid = Long.toString(ProcessTools.getProcessId());
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ProcessBuilder pb = new ProcessBuilder();
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// Find an address
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long addr = wb.NMTReserveMemory(reserveSize);
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// Release it
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wb.NMTReleaseMemory(addr, reserveSize);
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long attempt_addr = wb.NMTAttemptReserveMemoryAt(addr, reserveSize);
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if (attempt_addr == 0) {
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// We didn't manage ot get the requested memory address.
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// It's not necessarily a bug, so giving up.
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return;
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}
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assertEQ(addr, attempt_addr);
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pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid,
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"VM.native_memory", "detail" });
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=4096KB, committed=0KB)");
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wb.NMTReleaseMemory(addr, reserveSize);
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output = new OutputAnalyzer(pb.start());
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output.shouldNotContain("Test (reserved=");
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output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*"
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+ Long.toHexString(addr + reserveSize) + "\\] reserved 4096KB for Test");
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}
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}
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