On Sunday 28 December 2008 18:52:29, Pedro Alves wrote:
> Hi guys,
> 
> This drops the last bits of ONE_PROCESS_WRITETEXT macro from the
> codebase, since no target/host actually defines this by now.
> 

Updated patch attached.  This one really deletes all traces of it, I
think.  I had forgotten to delete the bit I quoted below
from the user manual.  :-)

> The "It might be running in another process" notice in normal_stop
> when breakpoints fail to be removed is quite likelly related to this, and
> although wasn't conditionalized on ONE_PROCESS_WRITETEXT, should be dropped as
> well IMO, as it is confusing.  Would anyone miss it?  This was the 
> reason I haven't checked it in as obvious yet.
> 
> The most complete description I could find of this macro was in gdb 4.6
> sources:
> 
>  gdb/xm-hp300bsd.h-64-/* Kernel is a bit tenacious about sharing text segments, disallowing bpts.  */
>  gdb/xm-hp300bsd.h:65:#define    ONE_PROCESS_WRITETEXT
> 
>  @c FIXME: "cannot insert breakpoints" error, v unclear.
>  @c        Q in pending mail to Gilmore. ---pesch@cygnus.com, 26mar91
>  @c        some light may be shed by looking at instances of
>  @c        ONE_PROCESS_WRITETEXT.  But error message seems possible otherwise
>  @c        too.  pesch, 20sep91
>  Under some operating systems, breakpoints cannot be used in a program if
>  any other process is running that program.  In this situation,
>  attempting to run or continue a program with a breakpoint causes _GDBN__
>  to stop the other process.
> 
>  When this happens, you have three ways to proceed:
> 
>  @enumerate
>  @item
>  Remove or disable the breakpoints, then continue.
> 
>  @item
>  Suspend _GDBN__, and copy the file containing your program to a new name.
>  Resume _GDBN__ and use the @code{exec-file} command to specify that _GDBN__
>  should run your program under that name.  Then start your program again.
> 
>  @c FIXME: RMS commented here "Show example".  Maybe when someone
>  @c explains the first FIXME: in this section...
> 
> And in this 1991 ChangeLog entry:
> 
>  Mon Sep  9 13:45:57 1991  John Gilmore  (gnu at cygint.cygnus.com)
> 
>         * breakpoint.c (insert_breakpoints):  Restore warning about
>         the program might be running in another process, but only for
>         systems with this brain death (#ifdef ONE_PROCESS_WRITETEXT).
>         * xm-hp300bsd.h, xm-mips.h, xm-vax.h:  Define it.
> 
> I don't think we care about systems with this brain death anymore ...
> 



-- 
Pedro Alves