Fix nodejs on 64bit machines

[amir-s]

Running nodejs on my 64bit server always produces empty user.out and therefore results in wrong answer.

Running ldd `which nodejs` gives me:

linux-vdso.so.1 =>  (0x00007fff34849000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007fd35691c000)
libuv.so.1 => /usr/lib/x86_64-linux-gnu/libuv.so.1 (0x00007fd3566f9000)
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fd3564f1000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fd3562d4000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fd3560d0000)
libssl.so.1.0.0 => /lib/x86_64-linux-gnu/libssl.so.1.0.0 (0x00007fd355e67000)
libcrypto.so.1.0.0 => /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 (0x00007fd355a23000)
libicui18n.so.55 => /usr/lib/x86_64-linux-gnu/libicui18n.so.55 (0x00007fd3555c1000)
libicuuc.so.55 => /usr/lib/x86_64-linux-gnu/libicuuc.so.55 (0x00007fd35522d000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fd354eab000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fd354ba2000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fd35498c000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fd3545c2000)
/lib64/ld-linux-x86-64.so.2 (0x00007fd356b36000)
libicudata.so.55 => /usr/lib/x86_64-linux-gnu/libicudata.so.55 (0x00007fd352b0b000)

So, I updated the list of dynamic libraries needed for nodejs accordingly.
I ran judge_client and added the missing syscalls.
Now it seems to be working:

$ ./judge_client 1013 1 /home/judge debug
127.0.0.1
debian-sys-maint
****************
jol
3306
2
64
-Xms64M
-Xmx128M
0
0
http://127.0.0.1/JudgeOnline
IP
admin
1
1
1
0
0
ifconfig|grep 'inet'|awk -F: '{printf $2}'|awk  '{printf $1}'
/bin/umount -f /home/judge/run1//proc
umount: /home/judge/run1//proc: mountpoint not found
/bin/umount -f /home/judge/run1//dev 
umount: /home/judge/run1//dev: mountpoint not found
/bin/umount -f /home/judge/run1//lib 
umount: /home/judge/run1//lib: mountpoint not found
/bin/umount -f /home/judge/run1//lib64 
umount: /home/judge/run1//lib64: mountpoint not found
/bin/umount -f /home/judge/run1//etc/alternatives 
umount: /home/judge/run1//etc/alternatives: mountpoint not found
/bin/umount -f /home/judge/run1//usr 
umount: /home/judge/run1//usr: mountpoint not found
/bin/umount -f /home/judge/run1//bin 
umount: /home/judge/run1//bin: mountpoint not found
/bin/umount -f /home/judge/run1//proc 
umount: /home/judge/run1//proc: mountpoint not found
/bin/umount -f bin usr lib lib64 etc/alternatives proc dev 
umount: bin: mountpoint not found
umount: usr: mountpoint not found
umount: lib: mountpoint not found
umount: lib64: mountpoint not found
umount: etc/alternatives: mountpoint not found
umount: /proc: target is busy
        (In some cases useful info about processes that
         use the device is found by lsof(8) or fuser(1).)
umount: dev: mountpoint not found
/bin/umount -f /home/judge/run1//* 
umount: /home/judge/run1//log: not mounted
/bin/umount -f /home/judge/run1//log/* 
umount: /home/judge/run1//log/Main.js: not mounted
umount: /home/judge/run1//log/ce.txt: not mounted
umount: /home/judge/run1//log/data.in: not mounted
umount: /home/judge/run1//log/dev: not mounted
umount: /home/judge/run1//log/error.out: not mounted
umount: /home/judge/run1//log/lib: not mounted
umount: /home/judge/run1//log/lib64: not mounted
umount: /home/judge/run1//log/nodejs: not mounted
umount: /home/judge/run1//log/user.out: not mounted
umount: /home/judge/run1//log/usr: not mounted
/bin/umount -f /home/judge/run1//log/etc/alternatives 
umount: /home/judge/run1//log/etc/alternatives: mountpoint not found
/bin/rm -rf /home/judge/run1//log/*
mkdir /home/judge/run1//log/
mkdir: cannot create directory ‘/home/judge/run1//log/’: File exists
/bin/mv /home/judge/run1//* /home/judge/run1//log/
/bin/mv: cannot move '/home/judge/run1//log' to a subdirectory of itself, '/home/judge/run1//log/log'
/bin/mkdir -p /dev/shm/hustoj//home/judge/run1/
/bin/ln -s /dev/shm/hustoj//home/judge/run1/ /home/judge/
/bin/ln: failed to create symbolic link '/home/judge/run1': File exists
/bin/chown judge /dev/shm/hustoj//home/judge/run1/ 
chmod 755 /dev/shm/hustoj//home/judge/run1/ 
/bin/ln -s /home/judge/data /dev/shm/hustoj//home/judge/
/bin/ln: failed to create symbolic link '/dev/shm/hustoj//home/judge/data': File exists
Main=Main.jschown judge /home/judge/run1//Main.js
time: 3 mem: 320
nothing to do!
compile end!
status=0
/bin/umount -f bin usr lib lib64 etc/alternatives proc dev 2>&1 >/dev/null
umount: bin: mountpoint not found
umount: usr: mountpoint not found
umount: lib: mountpoint not found
umount: lib64: mountpoint not found
umount: etc/alternatives: mountpoint not found
umount: /proc: target is busy
        (In some cases useful info about processes that
         use the device is found by lsof(8) or fuser(1).)
umount: dev: mountpoint not found
/bin/umount -f /home/judge/run1//* 2>&1 >/dev/null
umount: /home/judge/run1//Main.js: not mounted
umount: /home/judge/run1//ce.txt: not mounted
umount: /home/judge/run1//log: not mounted
/bin/umount -f /home/judge/run1//proc
umount: /home/judge/run1//proc: mountpoint not found
/bin/umount -f /home/judge/run1//dev 
umount: /home/judge/run1//dev: mountpoint not found
/bin/umount -f /home/judge/run1//lib 
umount: /home/judge/run1//lib: mountpoint not found
/bin/umount -f /home/judge/run1//lib64 
umount: /home/judge/run1//lib64: mountpoint not found
/bin/umount -f /home/judge/run1//etc/alternatives 
umount: /home/judge/run1//etc/alternatives: mountpoint not found
/bin/umount -f /home/judge/run1//usr 
umount: /home/judge/run1//usr: mountpoint not found
/bin/umount -f /home/judge/run1//bin 
umount: /home/judge/run1//bin: mountpoint not found
/bin/umount -f /home/judge/run1//proc 
umount: /home/judge/run1//proc: mountpoint not found
/bin/umount -f bin usr lib lib64 etc/alternatives proc dev 
umount: bin: mountpoint not found
umount: usr: mountpoint not found
umount: lib: mountpoint not found
umount: lib64: mountpoint not found
umount: etc/alternatives: mountpoint not found
umount: /proc: target is busy
        (In some cases useful info about processes that
         use the device is found by lsof(8) or fuser(1).)
umount: dev: mountpoint not found
/bin/umount -f /home/judge/run1//* 
umount: /home/judge/run1//Main.js: not mounted
umount: /home/judge/run1//ce.txt: not mounted
umount: /home/judge/run1//log: not mounted
/bin/umount -f /home/judge/run1//log/* 
umount: /home/judge/run1//log/*: mountpoint not found
/bin/umount -f /home/judge/run1//log/etc/alternatives 
umount: /home/judge/run1//log/etc/alternatives: mountpoint not found
/bin/umount -f /home/judge/run1//proc
umount: /home/judge/run1//proc: mountpoint not found
/bin/umount -f /home/judge/run1//dev 
umount: /home/judge/run1//dev: mountpoint not found
/bin/umount -f /home/judge/run1//lib 
umount: /home/judge/run1//lib: mountpoint not found
/bin/umount -f /home/judge/run1//lib64 
umount: /home/judge/run1//lib64: mountpoint not found
/bin/umount -f /home/judge/run1//etc/alternatives 
umount: /home/judge/run1//etc/alternatives: mountpoint not found
/bin/umount -f /home/judge/run1//usr 
umount: /home/judge/run1//usr: mountpoint not found
/bin/umount -f /home/judge/run1//bin 
umount: /home/judge/run1//bin: mountpoint not found
/bin/umount -f /home/judge/run1//proc 
umount: /home/judge/run1//proc: mountpoint not found
/bin/umount -f bin usr lib lib64 etc/alternatives proc dev 
umount: bin: mountpoint not found
umount: usr: mountpoint not found
umount: lib: mountpoint not found
umount: lib64: mountpoint not found
umount: etc/alternatives: mountpoint not found
umount: /proc: target is busy
        (In some cases useful info about processes that
         use the device is found by lsof(8) or fuser(1).)
umount: dev: mountpoint not found
/bin/umount -f /home/judge/run1//* 
umount: /home/judge/run1//Main.js: not mounted
umount: /home/judge/run1//ce.txt: not mounted
umount: /home/judge/run1//log: not mounted
/bin/umount -f /home/judge/run1//log/* 
umount: /home/judge/run1//log/*: mountpoint not found
/bin/umount -f /home/judge/run1//log/etc/alternatives 
umount: /home/judge/run1//log/etc/alternatives: mountpoint not found
mkdir -p /home/judge/run1//dev
/bin/mount -o bind /dev /home/judge/run1//dev
/bin/mkdir -p /home/judge/run1//usr/lib /home/judge/run1//lib/i386-linux-gnu/ /home/judge/run1//lib64/
/bin/cp /lib/i386-linux-gnu/libz.so.*  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/lib/i386-linux-gnu/libz.so.*': No such file or directory
/bin/cp /usr/lib/i386-linux-gnu/libuv.so.*  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/usr/lib/i386-linux-gnu/libuv.so.*': No such file or directory
/bin/cp /usr/lib/i386-linux-gnu/libicui18n.so.*  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/usr/lib/i386-linux-gnu/libicui18n.so.*': No such file or directory
/bin/cp /usr/lib/i386-linux-gnu/libicuuc.so.*  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/usr/lib/i386-linux-gnu/libicuuc.so.*': No such file or directory
/bin/cp /usr/lib/i386-linux-gnu/libicudata.so.*  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/usr/lib/i386-linux-gnu/libicudata.so.*': No such file or directory
/bin/cp /lib/i386-linux-gnu/libtinfo.so.*  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/lib/i386-linux-gnu/libtinfo.so.*': No such file or directory
/bin/cp /usr/lib/i386-linux-gnu/libcares.so.*  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/usr/lib/i386-linux-gnu/libcares.so.*': No such file or directory
/bin/cp /usr/lib/libv8.so.*  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/usr/lib/libv8.so.*': No such file or directory
/bin/cp /lib/i386-linux-gnu/libssl.so.*  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/lib/i386-linux-gnu/libssl.so.*': No such file or directory
/bin/cp /lib/i386-linux-gnu/libcrypto.so.*  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/lib/i386-linux-gnu/libcrypto.so.*': No such file or directory
/bin/cp /lib/i386-linux-gnu/libdl.so.*  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/lib/i386-linux-gnu/libdl.so.*': No such file or directory
/bin/cp /lib/i386-linux-gnu/librt.so.*  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/lib/i386-linux-gnu/librt.so.*': No such file or directory
/bin/cp /usr/lib/i386-linux-gnu/libstdc++.so.*  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/usr/lib/i386-linux-gnu/libstdc++.so.*': No such file or directory
/bin/cp /lib/i386-linux-gnu/libpthread.so.*  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/lib/i386-linux-gnu/libpthread.so.*': No such file or directory
/bin/cp /lib/i386-linux-gnu/libc.so.6  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/lib/i386-linux-gnu/libc.so.6': No such file or directory
/bin/cp /lib/i386-linux-gnu/libm.so.6  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/lib/i386-linux-gnu/libm.so.6': No such file or directory
/bin/cp /lib/i386-linux-gnu/libgcc_s.so.1  /home/judge/run1//lib/i386-linux-gnu/
/bin/cp: cannot stat '/lib/i386-linux-gnu/libgcc_s.so.1': No such file or directory
/bin/cp /lib/ld-linux.so.*  /home/judge/run1//lib/
/bin/cp: cannot stat '/lib/ld-linux.so.*': No such file or directory
/bin/mkdir -p /home/judge/run1//usr/lib /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /lib/x86_64-linux-gnu/libz.so.* /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /usr/lib/x86_64-linux-gnu/libuv.so.* /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /lib/x86_64-linux-gnu/librt.so.* /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /lib/x86_64-linux-gnu/libpthread.so.* /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /lib/x86_64-linux-gnu/libdl.so.* /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /lib/x86_64-linux-gnu/libssl.so.* /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /lib/x86_64-linux-gnu/libcrypto.so.* /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /usr/lib/x86_64-linux-gnu/libicui18n.so.* /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /usr/lib/x86_64-linux-gnu/libicuuc.so.* /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /usr/lib/x86_64-linux-gnu/libstdc++.so.* /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /lib/x86_64-linux-gnu/libm.so.* /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /lib/x86_64-linux-gnu/libgcc_s.so.* /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /lib/x86_64-linux-gnu/libc.so.* /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /lib64/ld-linux-x86-64.so.* /home/judge/run1//lib64/
/bin/cp /usr/lib/x86_64-linux-gnu/libicudata.so.* /home/judge/run1//lib/x86_64-linux-gnu/
/bin/cp /usr/bin/nodejs /home/judge/run1//
sample
sample
/bin/cp '/home/judge/data/1000/sample.in' /home/judge/run1//data.in
/bin/cp /home/judge/data/1000/*.dic /home/judge/run1//
/bin/cp: cannot stat '/home/judge/data/1000/*.dic': No such file or directory
init_call_counter:16
pid=17423 judging /home/judge/data/1000/sample.in
/bin/grep 'python2' Main.py
/bin/grep: Main.py: No such file or directory
test0
test0
/bin/cp '/home/judge/data/1000/test0.in' /home/judge/run1//data.in
/bin/cp /home/judge/data/1000/*.dic /home/judge/run1//
/bin/cp: cannot stat '/home/judge/data/1000/*.dic': No such file or directory
init_call_counter:16
pid=17438 judging /home/judge/data/1000/test0.in
/bin/grep 'python2' Main.py
/bin/grep: Main.py: No such file or directory
test1
test1
/bin/cp '/home/judge/data/1000/test1.in' /home/judge/run1//data.in
/bin/cp /home/judge/data/1000/*.dic /home/judge/run1//
/bin/cp: cannot stat '/home/judge/data/1000/*.dic': No such file or directory
init_call_counter:16
pid=17453 judging /home/judge/data/1000/test1.in
/bin/grep 'python2' Main.py
/bin/grep: Main.py: No such file or directory
/bin/umount -f /home/judge/run1//proc
umount: /home/judge/run1//proc: mountpoint not found
/bin/umount -f /home/judge/run1//dev 
/bin/umount -f /home/judge/run1//lib 
umount: /home/judge/run1//lib: not mounted
/bin/umount -f /home/judge/run1//lib64 
umount: /home/judge/run1//lib64: not mounted
/bin/umount -f /home/judge/run1//etc/alternatives 
umount: /home/judge/run1//etc/alternatives: mountpoint not found
/bin/umount -f /home/judge/run1//usr 
umount: /home/judge/run1//usr: not mounted
/bin/umount -f /home/judge/run1//bin 
umount: /home/judge/run1//bin: mountpoint not found
/bin/umount -f /home/judge/run1//proc 
umount: /home/judge/run1//proc: mountpoint not found
/bin/umount -f bin usr lib lib64 etc/alternatives proc dev 
umount: bin: mountpoint not found
umount: usr: not mounted
umount: lib: not mounted
umount: lib64: not mounted
umount: etc/alternatives: mountpoint not found
umount: /proc: target is busy
        (In some cases useful info about processes that
         use the device is found by lsof(8) or fuser(1).)
umount: dev: not mounted
/bin/umount -f /home/judge/run1//* 
umount: /home/judge/run1//Main.js: not mounted
umount: /home/judge/run1//ce.txt: not mounted
umount: /home/judge/run1//data.in: not mounted
umount: /home/judge/run1//dev: not mounted
umount: /home/judge/run1//error.out: not mounted
umount: /home/judge/run1//lib: not mounted
umount: /home/judge/run1//lib64: not mounted
umount: /home/judge/run1//log: not mounted
umount: /home/judge/run1//nodejs: not mounted
umount: /home/judge/run1//user.out: not mounted
umount: /home/judge/run1//usr: not mounted
/bin/umount -f /home/judge/run1//log/* 
umount: /home/judge/run1//log/*: mountpoint not found
/bin/umount -f /home/judge/run1//log/etc/alternatives 
umount: /home/judge/run1//log/etc/alternatives: mountpoint not found
/bin/rm -rf /home/judge/run1//log/*
mkdir /home/judge/run1//log/
mkdir: cannot create directory ‘/home/judge/run1//log/’: File exists
/bin/mv /home/judge/run1//* /home/judge/run1//log/
/bin/mv: cannot move '/home/judge/run1//log' to a subdirectory of itself, '/home/judge/run1//log/log'
result=4

---

One thing I'm not so sure about is syscall 160 which is not whitelisted in any other languages. 160 is sys_setrlimit in 64bit architecture!

Also, syscall 7 is unique to JS (sys_poll) which I think should be ok since JS has non-blocking IO.

the JS code I've tested the client with:

var readline = require('readline');
var rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
  terminal: false
});

rl.on('line', function(line){
    console.log(line.split(' ').map(i => Number(i)).reduce((s,i) => s+i));
});

[amir-s]

I can provide a 64bit ubuntu machine if you need to test the code!

[zhblue]

let's hope nodejs won't do anything "bad"