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LUCENE-6795: Improve RamUsageTester in trunk 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1702693 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Uwe Schindler 2015-09-13 01:45:37 +00:00
parent b8a213ccf7
commit 01adad8899
1 changed files with 24 additions and 22 deletions
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46
lucene/test-framework/src/java/org/apache/lucene/util/RamUsageTester.java
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@ -188,31 +188,33 @@ public final class RamUsageTester {
*/
@SuppressForbidden(reason = "We need to access private fields of measured objects.")
private static ClassCache createCacheEntry(final Class<?> clazz) {
ClassCache cachedInfo;
long shallowInstanceSize = RamUsageEstimator.NUM_BYTES_OBJECT_HEADER;
final ArrayList<Field> referenceFields = new ArrayList<>(32);
for (Class<?> c = clazz; c != null; c = c.getSuperclass()) {
if (c == Class.class) {
// prevent inspection of Class' fields, throws SecurityException in Java 9!
continue;
}
final Field[] fields = c.getDeclaredFields();
for (final Field f : fields) {
if (!Modifier.isStatic(f.getModifiers())) {
shallowInstanceSize = RamUsageEstimator.adjustForField(shallowInstanceSize, f);
if (!f.getType().isPrimitive()) {
final PrivilegedAction<Field> act = () -> { f.setAccessible(true); return f; };
referenceFields.add(AccessController.doPrivileged(act));
return AccessController.doPrivileged((PrivilegedAction<ClassCache>) () -> {
ClassCache cachedInfo;
long shallowInstanceSize = RamUsageEstimator.NUM_BYTES_OBJECT_HEADER;
final ArrayList<Field> referenceFields = new ArrayList<>(32);
for (Class<?> c = clazz; c != null; c = c.getSuperclass()) {
if (c == Class.class) {
// prevent inspection of Class' fields, throws SecurityException in Java 9!
continue;
}
final Field[] fields = c.getDeclaredFields();
for (final Field f : fields) {
if (!Modifier.isStatic(f.getModifiers())) {
shallowInstanceSize = RamUsageEstimator.adjustForField(shallowInstanceSize, f);
if (!f.getType().isPrimitive()) {
f.setAccessible(true);
referenceFields.add(f);
}
}
}
}
}
cachedInfo = new ClassCache(
RamUsageEstimator.alignObjectSize(shallowInstanceSize),
referenceFields.toArray(new Field[referenceFields.size()]));
return cachedInfo;
cachedInfo = new ClassCache(
RamUsageEstimator.alignObjectSize(shallowInstanceSize),
referenceFields.toArray(new Field[referenceFields.size()]));
return cachedInfo;
});
}
}