RFR: 8302491: NoClassDefFoundError omits the original cause of an error

[Ilarion Nakonechnyy]

On Wed, 15 Feb 2023 00:46:23 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> The proposed approach added a new function for getting the cause of an exception -`java_lang_Throwable::get_cause_simple `, that gets called within `InstanceKlass::add_initialization_error`  if an old one `java_lang_Throwable::get_cause_with_stack_trace` didn't succeed because of an exception during the VM call. The simple function doesn't call the VM for getting a stack trace but fills in any other information about an exception.
>> 
>> Besides that, the discovering information about an exception was added to `ConstantPoolCacheEntry::save_and_throw_indy_exc` function. 
>> 
>> Jtreg for reproducing the issue also was added to the commit. 
>> The commit was tested with tier1 tests.
>
> test/hotspot/jtreg/runtime/ClassInitErrors/TestNoClassDefFoundCause.java line 26:
> 
>> 24: /**
>> 25:  * @test
>> 26:  * @bug 1234567
> 
> Fix the bug number.
> Do you need a @requires to run with -Xcomp?

Do you propose to use something like 
`@requires vm.compMode != "Xint"`

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PR: https://git.openjdk.org/jdk/pull/12566