RFR: 8343343: Misc crash dump improvements on more platforms after JDK-8294160 [v4]

[Martin Doerr]

On Wed, 6 Nov 2024 11:04:53 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

>> [JDK-8294160](https://bugs.openjdk.org/browse/JDK-8294160) has improved `os::print_tos_pc` for some platforms. This PR extends it to more platforms. I have moved it into shared code and made it generic.
>> In addition, `fetch_frame_from_context(const void* ucVoid)` checks the pc on more platforms, now. If it's bad, we use the caller PC instead.
>> 
>> Note that the address 0 is readable on AIX. Therefore, it requires an extra null check. Tested by
>> 
>> diff --git a/src/hotspot/cpu/ppc/ppc.ad b/src/hotspot/cpu/ppc/ppc.ad
>> index 6d3daa025e8..0f8de648d53 100644
>> --- a/src/hotspot/cpu/ppc/ppc.ad
>> +++ b/src/hotspot/cpu/ppc/ppc.ad
>> @@ -1557,6 +1557,12 @@ void MachPrologNode::emit(C2_MacroAssembler *masm, PhaseRegAlloc *ra_) const {
>>      __ std(return_pc, _abi0(lr), callers_sp);
>>    }
>>  
>> +  if (UseNewCode) {
>> +    __ li(R0, 0);
>> +    __ mtctr(R0);
>> +    __ bctrl();
>> +  }
>> +
>>    if (C->stub_function() == nullptr) {
>>      BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
>>      bs->nmethod_entry_barrier(masm, push_frame_temp);
>> 
>> 
>> The new version shows the "Instructions:" section at the caller PC which was missing on some platforms before this PR.
>
> Martin Doerr has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Arm32 part from Boris.

GHA failure is unrelated: Unable to download artifact(s): Artifact not found for name: bundles-jtreg-7.4+1

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PR Comment: https://git.openjdk.org/jdk/pull/21809#issuecomment-2459948427