>>>>> "Linus" == Linus Torvalds <torva...@linux-foundation.org> writes:
Linus> No. There is absolutely _no_ reason to believe that gdb et al would ever Linus> delete the ptrace interfaces anyway. Yes, in GDB we approximately never delete anything. Nevertheless, if the Linux kernel were to present a new user-space API, and if it had an advantage over ptrace, then we would port GDB to use it. There are other platforms where, IIRC, we now use some /proc thing instead of ptrace. There are definitely things we would like from such an API. Here's a few I can think of immediately, there are probably others. * Use an fd, not SIGCHLD+wait, to report inferior state changes to gdb. Internally we're already using a self-pipe to integrate this into gdb's main loop. Relatedly, don't mess with the inferior's parentage. * Support "displaced stepping" in the kernel; I think this would improve performance when debugging in non-stop mode. * Support some kind of breakpoint expression in the kernel; this would improve performance of conditional breakpoints. Perhaps the existing gdb agent expressions could be used. Tom
