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/*
* Copyright (c) 2023, 2025, 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 8319784
* @summary Check that the JVM is able to dump the heap even when there are ReduceAllocationMerge in the scope.
* @library /test/lib /
* @requires vm.flavor == "server" & !vm.emulatedClient
* @run main/othervm compiler.c2.TestReduceAllocationAndHeapDump
*/
package compiler.c2;
import java.io.File;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
public class TestReduceAllocationAndHeapDump {
public static void main(String[] args) throws Exception {
File dumpDirectory = new File("dumps");
try {
if (!dumpDirectory.exists()) {
dumpDirectory.mkdir();
}
String[] dumperArgs = {
"-XX:CompileThresholdScaling=0.01",
"-XX:+HeapDumpAfterFullGC",
"-XX:HeapDumpPath=" + dumpDirectory.getAbsolutePath(),
"-XX:CompileCommand=compileonly,compiler.c2.HeapDumper::testIt",
"-XX:CompileCommand=exclude,compiler.c2.HeapDumper::dummy",
HeapDumper.class.getName()
};
ProcessBuilder pb = ProcessTools.createTestJavaProcessBuilder(dumperArgs);
Process p = pb.start();
OutputAnalyzer out = new OutputAnalyzer(p);
if (out.getExitValue() != 0) {
throw new IllegalStateException("Subprocess finished with non-zero exit code.");
}
} finally {
File[] files = dumpDirectory.listFiles((dir, name) -> name.endsWith(".hprof"));
for (File file : files) {
System.out.println("Deleting " + file.getAbsolutePath());
file.delete();
}
}
}
}
class HeapDumper {
public static Point p = new Point(0);
public static void main(String[] args) throws Exception {
for (int i = 0; i < 5000; i++) {
testIt(i);
}
}
public static void testIt(int i) throws Exception {
Point p = (i % 2 == 0) ? new Point(i) : new Point(i);
dummy(i);
if (i < 5000) {
dummy(i);
} else {
dummy(p.x + i);
}
}
public static void dummy(int x) {
if (x > 4900) {
System.gc();
}
}
}
// Helper class
class Point {
public int x;
public Point(int xx) {
this.x = xx;
}
}
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