RFR: JDK-8302320: AsyncGetCallTrace obtains too few frames in sanity test

[David Holmes]

On Wed, 15 Feb 2023 07:50:56 GMT, Johannes Bechberger <duke at openjdk.org> wrote:

>> What is the test case? Is it sending signals and then using AGCT? If so then maybe a signal hits when a call is made but before the code has a chance to update unextended_sp?
>
>> What is the test case?
> 
> The sanity test I amended with more checks.
> 
>> Is it sending signals and then using AGCT?
> 
> No. Just calling ASGCT directly in a native method which is called directly in the main method of a JTREG test.

Are you referring to the test in test/hotspot/jtreg/serviceability/AsyncGetCallTrace/ ?

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PR: https://git.openjdk.org/jdk/pull/12535