FastJudge, a judge kernel under linux without syscall tracing.
License: MIT License
FastJudge is a judge kernel under linux. Unlike many other judges, FastJudge does not use ptrace to trace system call. Instead, it uses chroot for filesystem control, setuid/setgid for permission control, setrlimit for limiting resources like CPU and Memory. No ptrace means no cost for switching between judge and the running problem.
Project is using scons. Remember to install scons and python :)
Any issues about this project, please submit an issue or send an email to [email protected]
SIGALRM handler (in order to interrupt waitid call) doesn't work, make it possible to run forever(sleep forever) .
When I changed some code, and run 'scons', the new codes weren't compiled
Program can use things like fclose(stderr); and get a useable fd, and use it to open a network connection, and use it to upload data, get system infomation etc.
Please list the difference on output among different judge result,
such as Time Limit Exceeded, Memory Limit Exceeded, Output Limit Exceeded， Runtime Error
In order to use the 'demo' more conveniently, the time limit, memory limit and input&output should be parameters to 'demo'. Like -t time_limit, -m memory limit and so on. It is important to the users of fastjudge.
No matter what program is executed and judged, memory usage in report is always 0.
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