RFR: 8285976: compiler/exceptions/OptimizeImplicitExceptions.java can't pass with -XX:+DeoptimizeALot

[Tobias Hartmann]

On Tue, 3 May 2022 15:36:36 GMT, Volker Simonis <simonis at openjdk.org> wrote:

>> Disable DeoptimizeALot and DeoptimizeRandom, 2 develop options when run this test for stability.
>
> test/hotspot/jtreg/compiler/exceptions/OptimizeImplicitExceptions.java line 200:
> 
>> 198:         // The following options are both develop, getBooleanVMFlag() returns NULL in product build.
>> 199:         // If they are set in debug build, disable them for more test stability.
>> 200:         if (WB.getBooleanVMFlag("DeoptimizeALot")) {
> 
> If this really returns NULL in a product build, wont this cause an exception then?
> 
> Wouldn't it be easier to just unconditionally set them both to false:
> 
> WB.setBooleanVMFlag("DeoptimizeALot", false);
> WB.setBooleanVMFlag("DeoptimizeRandom", false);

If so, I think that should be done in the `@run` statement.

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PR: https://git.openjdk.java.net/jdk/pull/8513