[jifa-dev] Custom MAT build - SnapshotInfo.getHeapLayout returns null wi

[Jason Koch <jkoch@xxxxxxxxxxx>]

I see you have added a 'heap layout', however normal JDK hprof does not have this information, and there are numerous parts of JIFA which rely on it.

Specifically, `getHeapLayout()` can return null and is called in a few places. It can be fixed by always returning the UNKNOWN heap layout:

This works for me.

`````

  public boolean layoutAvailable() {
    return getHeapLayout().type() != HeapLayout.HeapType.UNKNOWN;
  }
 
  public HeapLayout getHeapLayout() {
    return (this.heapLayout == null) ? UNKNOWN_HEAP_LAYOUT : this.heapLayout;
  }

`````