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8199009: test/jdk/java/util/Locale/SoftKeys.java fails with OutOfMemoryError

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Reviewed-by: psandoz, naoto
This commit is contained in:
Claes Redestad 2018-03-10 02:58:39 +01:00
parent 1926d24306
commit 54b1510aa7
1 changed files with 18 additions and 8 deletions
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26
test/jdk/java/util/Locale/SoftKeys.java
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@ -35,15 +35,25 @@ public class SoftKeys {
private static final char[] CHARS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
public static void main(String[] args) {
// With 4 characters in "language", we'll fill up a 16M heap quickly,
// causing full GCs and SoftReference reclamation. Repeat at least two
// times to verify no NPEs appear when looking up Locale's whose
// softly referenced data in sun.util.locale.BaseLocale$Key might have
// been cleared.
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 512*1024; j++) {
new Locale(langForInt(j), "", "");
try {
// With 4 characters in "language", we'll fill up a 16M heap quickly,
// causing full GCs and SoftReference reclamation. Repeat at least two
// times to verify no NPEs appear when looking up Locale's whose
// softly referenced data in sun.util.locale.BaseLocale$Key might have
// been cleared.
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 512*1024; j++) {
new Locale(langForInt(j), "", "");
}
}
} catch (OutOfMemoryError e) {
// Can happen on some system configurations, and while increasing heap
// size would allow GC to keep up, it also makes it impractically hard
// to reproduce NPE issues that could arise when references are being
// cleared.
// Do a System.gc() to not throw an OOME again in the jtreg wrapper.
System.gc();
}
}