[Bug server/30453] gdbserver cannot set breakpoints when /proc/pid/mem is not writable

["pedro at palves dot net" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=30453

--- Comment #2 from Pedro Alves <pedro at palves dot net> ---
What's the point of setting up a system such that a debugger can't write to 
inferior memory using /proc/pid/mem, but it can write via ptrace?  That gives
you no extra protection.  I think the right fix is to just make it so that the
kernel allows writes if the calling process has ptrace permissions over the
target pid, even if it prohibits other processes from writing.

The workaround on the gdb side was for very old kernels, and for example will
not work with non-stop mode, and of course does not support writing memory
while threads are running (such as setting breakpoints), which was the point of
switching to /proc/pid/mem all the time.  I would hope that with recent enough
kernels things would just work reasonably.

-- 
You are receiving this mail because:
You are on the CC list for the bug.