RFR(T): 8239503: FieldLayout/OldLayoutCheck.java fails due to "RuntimeException: Misplaced int field: expected 24 to equal 12"

[Daniel D. Daugherty]

Greetings,

We have a Tier3 failure that's causing a bit of noise in the CI.

Per has determined that the test in question should not run with ZGC
and added a patch to the bug report. I'm testing that patch with a
Tier3 test run right now...

Here's what it looks like:

$ hg diff
diff -r 38fc3785784a 
test/hotspot/jtreg/runtime/FieldLayout/OldLayoutCheck.java
--- a/test/hotspot/jtreg/runtime/FieldLayout/OldLayoutCheck.java Thu Feb 
20 20:04:15 2020 +0000
+++ b/test/hotspot/jtreg/runtime/FieldLayout/OldLayoutCheck.java Thu Feb 
20 15:20:47 2020 -0500
@@ -28,7 +28,7 @@
   * @library /test/lib
   * @modules java.base/jdk.internal.misc
   *          java.management
- * @requires vm.bits == "64"
+ * @requires vm.bits == "64" & vm.gc != "Z"
   * @run main/othervm -XX:+UseCompressedClassPointers 
-XX:-UseEmptySlotsInSupers OldLayoutCheck
   */


Thanks, in advance, for any comments, questions or suggestions.

Dan