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8287876: The recently de-problemlisted TestTitledBorderLeak test is unstable #9051

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8287876: The recently de-problemlisted TestTitledBorderLeak test is unstable #9051

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8287876: The recently de-problemlisted TestTitledBorderLeak test is u…
mrserb Jun 7, 2022
da1a82c
Update TestTitledBorderLeak.java
mrserb Jun 7, 2022
125bf43
Smaller version
mrserb Jun 7, 2022
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49 changes: 18 additions & 31 deletions test/jdk/javax/swing/border/TestTitledBorderLeak.java
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Original file line number Diff line number Diff line change
Expand Up @@ -21,45 +21,32 @@
* questions.
*/

import java.lang.ref.Reference;
import java.lang.ref.WeakReference;

import javax.swing.border.TitledBorder;

/*
/**
* @test
* @bug 8204963
* @summary Verifies TitledBorder's memory leak
* @run main/othervm -Xmx10M TestTitledBorderLeak
* @library /javax/swing/regtesthelpers
* @build Util
* @run main/timeout=60/othervm -mx32m TestTitledBorderLeak
*/
public class TestTitledBorderLeak {
public static void main(String[] args) throws Exception {
int max = 100000;
long initialFreeMemory = 0L;
long currentFreeMemory;
try {
for (int i = 1; i <= max; i++) {
new TitledBorder("");
if ((i % 1000) == 0) {
System.gc();
currentFreeMemory = dumpMemoryStatus("After " + i);
if(initialFreeMemory == 0L) {
initialFreeMemory = currentFreeMemory;
} else if( currentFreeMemory < initialFreeMemory/2) {
throw new RuntimeException("Memory halved: there's a leak");
}
public final class TestTitledBorderLeak {

}
}
}catch(OutOfMemoryError e) {
// Don't think it would work; should not happen
System.gc();
throw new RuntimeException("There was OOM");
public static void main(String[] args) throws Exception {
Reference<TitledBorder> border = getTitleBorder();
int attempt = 0;
while (border.get() != null) {
Util.generateOOME();
System.out.println("Not freed, attempt: " + attempt++);
}
System.out.println("Passed");
}
private static long dumpMemoryStatus(String msg) {
Runtime rt = Runtime.getRuntime();
long freeMem = rt.freeMemory();
System.out.println(msg + ": " + freeMem + " free");
return freeMem;

private static Reference<TitledBorder> getTitleBorder() {
TitledBorder tb = new TitledBorder("");
return new WeakReference<>(tb);
}
}