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#summary how to add programming language to hustoj. #labels Featured,Phase-Implementation

= Introduction =

Python for example

= Details =

  • write A+B problem solution in this language.
#!/usr/bin/python
a=input()
b=input()
print a+b
  • strace to check minimal syscalls,if you want 32-bits do it under 32-bits ,if you want a 64-bits do it under 64-bits too.
strace -ff python Main.py 2>&1|awk -F\( '{print $1}'|sort -u

output like:

access
......
write
  • copy the calls names to add new arrays in to okcallsXX.h,remember to add twice for 32/64-bits x86,armhf,mips, like r747
int LANG_YV[256]={SYS_access,SYS_write.....};
int LANG_YC[256]={-1,-1,......,0};
#else
int LANG_YV[256]={};
int LANG_YC[256]={0};
  • edit judge_client.cc
    • lang_ext add new ext for lang , "py" for python,r749
    • init_syscalls_limits add new route for python,r750
    • compile or chmod for python, r751
    • add void copy_python_runtime(char * work_dir),if there is a vm or runtime libs needed to copy into chroot dir. use "whereis python" "ldd /usr/bin/python" to locate the files,r752,r761
    • add python run command in run_solution(),r753-r756
  • recompile core using make.sh
  • add a new problem to test new language
  • submit the solution with an exist language
  • modify database to set language=6 and rejudge

update solution set language=6,result=0 where solution_id=2028;

  • if encounted CE or RE debug with

judge_client 2028 0 /home/judge debug