interactive tasks: solve deadlocks?
interactive tasks: logging of messages
terminology: problem -> task ?
-box: memory usage statistics (need to search for VMPeak in /proc/$PID/status, but it disappears too early)
-box: explicit breakpoints are reported as syscall #-1
Judges
~~~~~~
Various ideas:
scores dependent on time (like PL olympiad)
-box: configurable access to timers and /proc/self/{stat,fd}
box: limit the total amount of data written to files, so that quotas don't have to be set up
TomGav
~~~~~~
recursive try-ln for dir input
clean and well-defined expansion (beware of per-test re-expansion)
-machine-readable log file and/or metadata output from the sandbox
configurable names of in/out files (independent of $PROBLEM)
paranoidly check file mode/owner before running the sandbox
+
+Isolate
+~~~~~~~
+Make the list of bind-mounts configurable (some of them even read-only)
+Virtual /dev
+Installation
+Test: ptrace self
+Test: SIGSTOP
+Test: ping-pong timing attacks
+Test: big static memory
+Examine the use of taskstats for measuring memory
+Doc: mount -t cgroup none -o cpuset,cpuacct,memory /sys/fs/cgroup