RFR: 8360936: Test compiler/onSpinWait/TestOnSpinWaitAArch64.java fails after JDK-8359435 [v8]

[Evgeny Astigeevich]

On Thu, 10 Jul 2025 08:41:58 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Evgeny Astigeevich has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Apply 8360936-cosmetics-1.patch.txt from PR
>
> test/hotspot/jtreg/compiler/onSpinWait/TestOnSpinWaitAArch64.java line 151:
> 
>> 149:         while (iter.hasNext()) {
>> 150:             String line = iter.next().trim();
>> 151:             if (line.startsWith(";;}")) {
> 
> Oh, apologies, I made a little mistake here when playing around with trims. Should be: 
> Suggestion:
> 
>             if (line.startsWith(";; }")) {
> 
> 
> The test probably does not fail because it meets no instructions beyond the spin_wait block. Cleaner to fix it anyway.

I fixed this.
I have also added a specialized lambda function to count expected instructions:
- for disassembled code, just check a line.
- for hex code, split and count.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26072#discussion_r2197435713