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