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8244203: sun/tools/jhsdb/HeapDumpTestWithActiveProcess.java fails with NullPointerException

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Reviewed-by: sspitsyn, dtitov
This commit is contained in:
Chris Plummer 2020-05-22 13:29:26 -07:00
parent 4aa057013c
commit 9dc6f10755
4 changed files with 34 additions and 6 deletions
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12
src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/oops/InstanceKlass.java
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@ -145,6 +145,18 @@ public class InstanceKlass extends Klass {
public InstanceKlass(Address addr) {
super(addr);
// If the class hasn't yet reached the "loaded" init state, then don't go any further
// or we'll run into problems trying to look at fields that are not yet setup.
// Attempted lookups of this InstanceKlass via ClassLoaderDataGraph, ClassLoaderData,
// and Dictionary will all refuse to return it. The main purpose of allowing this
// InstanceKlass to initialize is so ClassLoaderData.getKlasses() will succeed, allowing
// ClassLoaderData.classesDo() to iterate over all Klasses (skipping those that are
// not yet fully loaded).
if (!isLoaded()) {
return;
}
if (getJavaFieldsCount() != getAllFieldsCount()) {
// Exercise the injected field logic
for (int i = getJavaFieldsCount(); i < getAllFieldsCount(); i++) {