Re: gdbserver tracepoints support proper

[Stan Shebs <stan@codesourcery.com>]

Doug Evans wrote:
> On Sun, Apr 4, 2010 at 4:21 PM, Pedro Alves <pedro@codesourcery.com> wrote:
>   
>> This finally adds a trace agent to gdbserver, and enough glue
>> to make it work for x86-linux.
>>     
>
> For reference sake,
> there's no technical reason why gdb itself can't support tracepoints, right?
> [IWBN to use tracepoints on linux, for example, without having to use gdbserver]
>
>   

I suppose not - you could try defining native versions of the tracepoint 
methods, convert tracepoint insertion to breakpoint insertion, manage 
the trace buffer within GDB, have agent expression evaluation call 
target vector to get registers or memory.  You'd have to do some 
trickiness with bpstats, and maybe extend target vector, so that if GDB 
sees a tracepoint hit via remote protocol, it's a bad error, but if 
native, it's handled more like a breakpoint with a command list.

Stan