[EXT] Re: [aarch64-port-dev ] RFR(XS): Provide information when hitting a HaltNode for architectures other than x86

[Doerr, Martin]

Hi Andrew,

I had also thought about using a trap based implementation.
Maybe it makes sense to add a feature to shared code for that.
E.g. we could emit an illegal instruction (which raises SIGILL) followed by some kind of index into a descriptor array.
PPC64 would also benefit from a more compact solution.

Best regards,
Martin


> -----Original Message-----
> From: Andrew Haley <aph at redhat.com>
> Sent: Mittwoch, 6. Mai 2020 19:28
> To: Derek White <derekw at marvell.com>; Ningsheng Jian
> <ningsheng.jian at arm.com>; Liu, Xin <xxinliu at amazon.com>; Doerr, Martin
> <martin.doerr at sap.com>; hotspot-compiler-dev at openjdk.java.net
> Cc: aarch64-port-dev at openjdk.java.net
> Subject: Re: [EXT] Re: [aarch64-port-dev ] RFR(XS): Provide information
> when hitting a HaltNode for architectures other than x86
> 
> On 5/6/20 4:47 PM, Derek White wrote:
> > If Andrew's trap version works out that would be good too.
> 
> Oh, uh, I guess I'll have to write it, then.  :-)
> 
> --
> Andrew Haley  (he/him)
> Java Platform Lead Engineer
> Red Hat UK Ltd. <https://www.redhat.com>
> https://keybase.io/andrewhaley
> EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671