DeterministicDump.java fails due to garbage in structure padding

[2020-09-13T23:29:13.086022Z] Waiting for completion for process 33700
[2020-09-13T23:29:13.086094Z] Waiting for completion finished for process 33700
Command line: [/Users/fool/workspace/git/github/DamonFool/jdk/build/macosx-x86_64-server-release/images/jdk/bin/java -cp /Users/fool/workspace/git/github/DamonFool/jdk/build/macosx-x86_64-server-release/test-support/jtreg_test_hotspot_jtreg_runtime_cds_DeterministicDump_java/classes/0/runtime/cds/DeterministicDump.d:/Users/fool/workspace/git/github/DamonFool/jdk/test/hotspot/jtreg/runtime/cds:/Users/fool/workspace/git/github/DamonFool/jdk/build/macosx-x86_64-server-release/test-support/jtreg_test_hotspot_jtreg_runtime_cds_DeterministicDump_java/classes/0/test/lib:/Users/fool/workspace/open/jtreg/lib/javatest.jar:/Users/fool/workspace/open/jtreg/lib/jtreg.jar:/Users/fool/workspace/open/jtreg/lib/junit.jar:/Users/fool/workspace/open/jtreg/lib/testng.jar:/Users/fool/workspace/open/jtreg/lib/jcommander.jar -Xmx128M -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:SharedArchiveFile=SharedArchiveFile4.jsa -Xshare:dump -Xlog:cds=debug ]
[2020-09-13T23:29:13.088680Z] Gathering output for process 33701
[ELAPSED: 428 ms]
[logging stdout to /Users/fool/workspace/git/github/DamonFool/jdk/build/macosx-x86_64-server-release/test-support/jtreg_test_hotspot_jtreg_runtime_cds_DeterministicDump_java/scratch/0/runtime.cds.DeterministicDump.java-0004-SharedArchiveFile4.stdout]
[logging stderr to /Users/fool/workspace/git/github/DamonFool/jdk/build/macosx-x86_64-server-release/test-support/jtreg_test_hotspot_jtreg_runtime_cds_DeterministicDump_java/scratch/0/runtime.cds.DeterministicDump.java-0004-SharedArchiveFile4.stderr]
[STDERR]

[2020-09-13T23:29:13.514175Z] Waiting for completion for process 33701
[2020-09-13T23:29:13.514368Z] Waiting for completion finished for process 33701
STDERR:
java.lang.RuntimeException: File content different at byte #4, b0 = 115, b1 = 120
        at DeterministicDump.compare(DeterministicDump.java:117)
        at DeterministicDump.doTest(DeterministicDump.java:68)
        at DeterministicDump.main(DeterministicDump.java:47)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:564)
        at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:298)
        at java.base/java.lang.Thread.run(Thread.java:832)

JavaTest Message: Test threw exception: java.lang.RuntimeException
JavaTest Message: shutting down tes