RFR: 8255741: Zero: print signal name in unhandled signal handler

[Aleksey Shipilev]

On Mon, 2 Nov 2020 10:56:13 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>> At least one test -- `runtime/Safepoint/TestAbortVMOnSafepointTimeout.java` -- fails on Zero with:
>> 
>> # Internal Error (/home/shade/trunks/jdk/src/hotspot/os_cpu/linux_zero/os_linux_zero.cpp:250), pid=560280, tid=560281
>> # fatal error: caught unhandled signal 4
>> 
>> The test expects "SIGKILL (sent by kill)" in the test output.
>> 
>> Additional testing:
>>  - [x] `TestAbortVMOnSafepointTimeout.java` now passes on Linux x86_64 Zero.
>
> LGTM

Thanks! I was not aware of #982 -- that would be very good to have. Maybe push this simple patch to ease backporting? Making Zero pass tier1 in 11u would be nice. I suspect #982 would not be backportable?

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PR: https://git.openjdk.java.net/jdk/pull/1001