Re: [fpc-devel] What is / Where originates : FLAG_TRACE_BIT = $100; { our own invention } IN rtl\win\wininc\defines.inc

2014-04-01 Thread Dmitry Boyarintsev 
To add to that.

*nixes are using ptrace() function and PTRACE_SINGLESTEP request.
I do believe that setting EFlag (FLAG_TRACE_BIT for x86 machines) would
work for *nix systems (didn't try myself), but respecting defined API is
always a better approach.

thanks,
Dmitry


On Mon, Mar 31, 2014 at 9:58 PM, Dmitry Boyarintsev <
skalogryz.li...@gmail.com> wrote:

> http://en.wikipedia.org/wiki/FLAGS_register
>
> It's a trap (single-step) flag. to stop after each instruction. (IIRC with
> some exceptions).
> I'd think it should be AMD64 compatible.
>
> thanks,
> Dmitry
>
>
> On Mon, Mar 31, 2014 at 6:17 PM, Martin Frb  wrote:
>
>> C:\FPC\SVN\fpc_2.6.4\rtl\win\wininc\defines.inc
>>
>> line 5669 (in 3.6.4)
>>   { our own invention  }
>>  FLAG_TRACE_BIT = $100;
>>
>> This is only there for 32 bit and wince, but not for win64.
>>
>> But the problem is finding out what it actually means. All googling has
>> not brought any definition to it.
>>
>> From usage in old code in fpdebug, it is given as flag to
>>
>>   Context^.EFlags := Context^.EFlags or FLAG_TRACE_BIT;
>>   if not SetThreadContext(Handle, Context^)
>>
>>
>> An ideas?
>>
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Re: [fpc-devel] What is / Where originates : FLAG_TRACE_BIT = $100; { our own invention } IN rtl\win\wininc\defines.inc

2014-04-01 Thread Martin Frb 

On 01/04/2014 18:44, Dmitry Boyarintsev wrote:

To add to that.

*nixes are using ptrace() function and PTRACE_SINGLESTEP request.
I do believe that setting EFlag (FLAG_TRACE_BIT for x86 machines) 
would work for *nix systems (didn't try myself), but respecting 
defined API is always a better approach.




I was mainly about win64.
I had mainly googled it as an argument to the windows API (which was 
where I had found it in fpdebug code), and I found nothing on msdn.


Anyway, If it exists for 64 bits, should/can it be added to 
rtl\win\wininc\defines.inc same as it is for 32 bit?






On Mon, Mar 31, 2014 at 9:58 PM, Dmitry Boyarintsev 
mailto:skalogryz.li...@gmail.com>> wrote:


http://en.wikipedia.org/wiki/FLAGS_register

It's a trap (single-step) flag. to stop after each instruction.
(IIRC with some exceptions).
I'd think it should be AMD64 compatible.



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Re: [fpc-devel] What is / Where originates : FLAG_TRACE_BIT = $100; { our own invention } IN rtl\win\wininc\defines.inc

2014-04-01 Thread Dmitry Boyarintsev 
On Tue, Apr 1, 2014 at 1:47 PM, Martin Frb  wrote:

>
> Anyway, If it exists for 64 bits, should/can it be added to
> rtl\win\wininc\defines.inc same as it is for 32 bit?
>
> Imho, no. At least not in "rtl" defines.

1) it's not part of originating Windows headers (if these are used as part
of RTL definitions) - keep the base header as small as possible.
2) The flag itself is very debugging specific. Thus the declaration should
go with either separate debugging package or more specific CPU definition
header (not necessarily debugging related).

The idea here is to be as "component" as possible, rather than put
everything into a single ready for anything RTL (that would bloat it a lot).

thanks,
Dmitry
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