4 serviceability/jvmti tests timed out on macOS 10.15.3

The following tests timed out in the JDK16 CI:

serviceability/jvmti/GenerateEvents/MyPackage/GenerateEventsTest.java
serviceability/jvmti/CanGenerateAllClassHook/CanGenerateAllClassHook.java
serviceability/jdwp/AllModulesCommandTest.java
serviceability/jvmti/8036666/GetObjectLockCount.java

GenerateEventsTest.java has no indication that the test PASSED:

#section:main
----------messages:(6/349)----------
command: main -agentlib:GenerateEvents1 -agentlib:GenerateEvents2 MyPackage.GenerateEventsTest
reason: User specified action: run main/othervm/native -agentlib:GenerateEvents1 -agentlib:GenerateEvents2 MyPackage.GenerateEventsTest
Mode: othervm [/othervm specified]
Timeout information:
--- Timeout information end.
elapsed time (seconds): 486.095
----------configuration:(0/0)----------
----------System.out:(1/26)----------
Timeout refired 480 times
----------System.err:(0/0)----------
----------rerun:(37/5641)*----------


However CanGenerateAllClassHook.java appears to have
PASSED during the JTREG timeout handling:

[2020-06-15T01:18:52.328115Z] Waiting for completion for process 7689
[2020-06-15T01:18:52.328211Z] Waiting for completion finished for process 7689
Test PASSED.
----------System.err:(4/183)----------
java version "16-ea" 2021-03-16
Java(TM) SE Runtime Environment (fastdebug build 16-ea+2-14)
Java HotSpot(TM) 64-Bit Server VM (fastdebug build 16-ea+2-14, mixed mode)
STATUS:Passed.
----------rerun:(35/6733)*----------

AllModulesCommandTest.java also appears to have
PASSED during the JTREG timeout handling:

Module names reported by JDWP: [jdk.management.jfr, java.rmi, jdk.jdi, jdk.charsets, jdk.xml.dom, java.xml, java.datatransfer, jdk.jstatd, jdk.httpserver, java.desktop, java.security.sasl, jdk.zipfs, java.base, jdk.crypto.ec, jdk.javadoc, jdk.management.agent, jdk.jshell, jdk.editpad, java.sql.rowset, jdk.jsobject, jdk.sctp, jdk.jlink, java.smartcardio, jdk.unsupported, java.security.jgss, java.compiler, jdk.nio.mapmode, jdk.dynalink, jdk.unsupported.desktop, jdk.accessibility, jdk.security.jgss, java.sql, java.xml.crypto, java.transaction.xa, java.logging, jdk.jfr, jdk.crypto.cryptoki, jdk.net, java.naming, jdk.internal.ed, java.prefs, java.net.http, jdk.compiler, jdk.internal.opt, jdk.naming.rmi, jdk.jconsole, jdk.attach, jdk.internal.le, java.management, jdk.jdwp.agent, jdk.internal.jvmstat, java.instrument, jdk.management, jdk.security.auth, java.scripting, jdk.jdeps, jdk.jartool, java.management.rmi, jdk.naming.dns, jdk.localedata]
Module names reported by Java: [jdk.management.jfr, java.rmi, jdk.jdi, jdk.charsets, jdk.xml.dom, java.xml, java.datatransfer, jdk.jstatd, jdk.httpserver, java.desktop, java.security.sasl, jdk.zipfs, java.base, jdk.crypto.ec, jdk.javadoc, jdk.management.agent, jdk.jshell, jdk.editpad, java.sql.rowset, jdk.jsobject, jdk.sctp, java.smartcardio, jdk.jlink, jdk.unsupported, java.security.jgss, java.compiler, jdk.nio.mapmode, jdk.dynalink, jdk.unsupported.desktop, jdk.accessibility, jdk.security.jgss, java.sql, java.xml.crypto, java.transaction.xa, java.logging, jdk.jfr, jdk.crypto.cryptoki, jdk.net, java.naming, jdk.internal.ed, java.prefs, java.net.http, jdk.compiler, jdk.naming.rmi, jdk.internal.opt, jdk.jconsole, jdk.attach, jdk.internal.le, java.management, jdk.jdwp.agent, jdk.internal.jvmstat, java.instrument, jdk.management, jdk.security.auth, java.scripting, jdk.jdeps, jdk.jartool, java.management.rmi, jdk.naming.dns, jdk.localedata]
Test passed!
----------System.err:(4/183)----------
java version "16-ea" 2021-03-16
Java(TM) SE Runtime Environment (fastdebug build 16-ea+2-14)
Java HotSpot(TM) 64-Bit Server VM (fastdebug build 16-ea+2-14, mixed mode)
STATUS:Passed.
----------rerun:(37/6497)*----------


GetObjectLockCount.java also appears to have
PASSED during the JTREG timeout handling:

----------System.out:(6/99)----------
Timeout refired 480 times
Vm launched
ClassPrepareEvent
Found main thread.
resume...
testvm: ready
----------System.err:(4/183)----------
java version "16-ea" 2021-03-16
Java(TM) SE Runtime Environment (fastdebug build 16-ea+2-14)
Java HotSpot(TM) 64-Bit Server VM (fastdebug build 16-ea+2-14, mixed mode)
STATUS:Passed.
----------rerun:(34/5249)*----------