Daniel Jacobowitz wrote:
> No, that's not what I meant. When you attach using GDB, there is no
> way for GDB to determine if the process was previously stopped or
> running.
Likewise, there's a race condition with any other concurrent use
of SIGSTOP.
Perhaps one could introduce a PTRACE_ATTACH2 that uses "addr" to
indicate the signal that should be used to sychronize attaching.
That way, programs that use STOP/CONT for their own purposes could
be attached to with ptrace(PTRACE_ATTACH2,pid,SIGTRAP,0), or such.
If the process is already stopped, the debugger would be notified
with WSTOPSIG set to that signal instead of SIGTRAP.
- Werner
-- _________________________________________________________________________ / Werner Almesberger, Buenos Aires, Argentina wa@almesberger.net / /_http://www.almesberger.net/____________________________________________/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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