RFR: 8246434: Threads::print_on_error assumes that the heap has been set up

[David Holmes]

Looks good and trivial.

Thanks,
David

On 3/06/2020 8:24 pm, Stefan Karlsson wrote:
> Hi all,
> 
> Please review this trivial patch to null check the access to the heap, 
> when printing threads to the hs_err files.
> 
> https://cr.openjdk.java.net/~stefank/8246434/webrev.01
> https://bugs.openjdk.java.net/browse/JDK-8246434
> 
> Output from an initialization crash without this fix:
> ---
> Other Threads:
> 
> [error occurred during error reporting (printing all threads), id 0xb, 
> SIGSEGV (0xb) at pc=0x0000000104cbb609]
> ---
> 
> with the fix:
> ---
> Other Threads:
> 
> =>0x00007ff10980e220 (exited) JavaThread "Unknown thread" 
> [_thread_in_vm, id=7171, stack(0x00007000083dc000,0x00007000084dc000)]
> ---
> 
> Thanks,
> StefanK