On Fri, Jun 16, 2006 at 10:42:00AM -0400, Frank Ch. Eigler wrote:
> Indeed, I like what I see (at least those parts I understand) in
> roland's utrace code. One missed opportunity bit appears to be any
> new support for something like per-thread breakpoints.
>
> If I correctly understand how gdb etc. work, a hit breakpoint involves
> stoppage of all other threads of a process, then the breakpoint
> instruction is replaced by the original one, then the thread is
> single-stepped, then the breakpoint is put back, then finally all
> threads are resumed. Could utrace API provide short-lived per-thread
> page copies to execute the single-stepped original instruction out of,
> and avoid stopping & resuming all other threads?
FYI: I talked with Roland about this a while ago, and got the
impression that he was interested in implementing it, but wanted to get
utrace going first. It doesn't really relate to utrace; but it would
need a new interface however it was implemented.
GDB really does crave this feature.
--
Daniel Jacobowitz
CodeSourcery
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