RFR: 8264004: Don't use TRAPS if no exceptions are thrown [v4]

[Coleen Phillimore]

On Tue, 23 Mar 2021 16:33:15 GMT, Daniel D. Daugherty <dcubed at openjdk.org> wrote:

>> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Fix load_new_class_versions and remove more traps.
>
> Looks good. 
> 
> You should also do JDI test runs for this changeset and you should wait
> to hear from the Serviceability team before integration.

I ran the jvmti and jdi tests, as well as the serviceability/jvmti/RedefineClasses tests, and jdk/java/lang/instrument tests.

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PR: https://git.openjdk.java.net/jdk/pull/3141