[lldb-dev] [Bug 20755] New: llgs: RSP qProcessInfo should return triple on Linux, not cputype/cpusubtype.

[Matthew Gardiner]

Hi Todd,

Ok, I'll let you know what I'll need when I get to "how to support 
kalimba variant recognition from gdb-remote".

As you may have seen from

"r216541 - Add support for kalimba architecture variants 3, 4 and 5."

I've already added recognition of kal variants from ELF parse.

cheers
Matt

Todd Fiala wrote:
> Hey Matthew,
>
> Right now the code is setup to either generate the architecture based 
> on cputype/cpusubtype (which IIRC map directly to xnu/Mach values) and 
> build the ArchSpec from that + other details, OR to use the triple to 
> generate the ArchSpecs.  The cputype/cpusubtype are really geared 
> toward the darwin side of the house.
>
> However, there is no reason why you couldn't use those fields aside 
> from the caveat above.  Care will just need to be taken to ensure the 
> ArchSpec based on parsing these works correctly, and (probably) some 
> of the Apple-specific setup paths may need to be guarded with OS 
> checks if you want different behavior than what darwin is doing.
>
> Feel free to send up snippets of code you're considering.  I've had to 
> debug through quite a bit of code around these areas lately as I get 
> llgs running for local debugging.  (This bug needed to be resolved as 
> part of that effort).
>
>
> On Tue, Aug 26, 2014 at 10:16 PM, Matthew Gardiner <mg11 at csr.com 
> <mailto:mg11 at csr.com>> wrote:
>
>     Hi Todd,
>
>     Will it still be possible that some non-Apple stuff (e.g. kalimba)
>     can extract a subtype field (from say qProcessInfo or qHostInfo)?
>     I'll need this to support kalimba architecture variants at some
>     stage. (Bear in mind that CSR don't use share
>     GDBRemoteCommunicationServer, only GDBRemoteCommunicationClient.
>
>     thanks,
>     Matt
>
>     bugzilla-daemon at llvm.org <mailto:bugzilla-daemon at llvm.org> wrote:
>
>         Bug ID  20755 <http://llvm.org/bugs/show_bug.cgi?id=20755>
>
>         Summary         llgs: RSP qProcessInfo should return triple on
>         Linux, not cputype/cpusubtype.
>         Product         lldb
>         Version         unspecified
>         Hardware        PC
>         OS      Linux
>         Status  NEW
>         Severity        normal
>         Priority        P
>         Component       All Bugs
>         Assignee lldb-dev at cs.uiuc.edu <mailto:lldb-dev at cs.uiuc.edu>
>         Reporter tfiala at google.com <mailto:tfiala at google.com>
>         Classification  Unclassified
>
>         1. Fix GDBRemoteCommunicationServer to send a triple instead of
>         cputype/cpusubtype when llgs is running on non-__APPLE__.
>
>         2. Modify GDBRemoteCommunicationClient::GetCurrentProcessInfo
>         () to accept a
>         triple and adjust ArchSpec appropriately when provided.
>
>         This will fix an issue where llgs is mis-interpreting the
>         remote process exe
>         triple.
>         ------------------------------------------------------------------------
>
>
>         You are receiving this mail because:
>
>           * You are the assignee for the bug.
>
>
>
>         To report this email as spam click here
>         <https://www.mailcontrol.com/sr/MZbqvYs5QwJvpeaetUwhCQ==>.
>
>
>
>         _______________________________________________
>         lldb-dev mailing list
>         lldb-dev at cs.uiuc.edu <mailto:lldb-dev at cs.uiuc.edu>
>         http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
>
>
>
>
>     Member of the CSR plc group of companies. CSR plc registered in
>     England and Wales, registered number 4187346, registered office
>     Churchill House, Cambridge Business Park, Cowley Road, Cambridge,
>     CB4 0WZ, United Kingdom
>     More information can be found at www.csr.com <http://www.csr.com>.
>     Keep up to date with CSR on our technical blog, www.csr.com/blog
>     <http://www.csr.com/blog>, CSR people blog, www.csr.com/people
>     <http://www.csr.com/people>, YouTube, www.youtube.com/user/CSRplc
>     <http://www.youtube.com/user/CSRplc>, Facebook,
>     www.facebook.com/pages/CSR/191038434253534
>     <http://www.facebook.com/pages/CSR/191038434253534>, or follow us
>     on Twitter at www.twitter.com/CSR_plc
>     <http://www.twitter.com/CSR_plc>.
>     New for 2014, you can now access the wide range of products
>     powered by aptX at www.aptx.com <http://www.aptx.com>.
>     _______________________________________________
>     lldb-dev mailing list
>     lldb-dev at cs.uiuc.edu <mailto:lldb-dev at cs.uiuc.edu>
>     http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
>
>
>
>
> -- 
> Todd Fiala | 	 Software Engineer | 	tfiala at google.com 
> <mailto:tfiala at google.com> | 	650-943-3180
>
>