riju
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Published
20 hours ago •
radian-software
radian-software
Programs are not cleaned up under some circumstances
Suppose I write this program in C++:
#include <iostream>
int main() {
while (1) {
std::cout << "yes" << std::endl;
}
}
Then if I run it, say, four times using the Run button, I'll end up with this output from within the container (via docker exec):
root@cpp:~/src# pstree -a
my_init -u /usr/local/sbin/my_init --quiet --skip-runit -- bash -c...
└─bash -c...
├─bash -c...
│ └─bash -c...
│ └─runuser -u riju -- bash -c exec /var/cache/riju/share/riju-pty "$@" -- bash -c...
│ └─riju-pty bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextra main.cpp -o main ) && ( ./main )
│ ├─bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextra main.cpp -o main ) && ( ./main )
│ │ └─main
│ └─(riju-pty)
├─bash -c...
│ └─bash -c...
│ └─runuser -u riju -- bash -c exec /var/cache/riju/share/riju-pty "$@" -- bash -c...
│ └─riju-pty bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextra main.cpp -o main ) && ( ./main )
│ ├─bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextra main.cpp -o main ) && ( ./main )
│ │ └─main
│ └─(riju-pty)
├─bash -c...
│ └─bash -c...
│ └─runuser -u riju -- bash -c exec /var/cache/riju/share/riju-pty "$@" -- bash -c...
│ └─riju-pty bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextra main.cpp -o main ) && ( ./main )
│ ├─bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextra main.cpp -o main ) && ( ./main )
│ │ └─main
│ └─(riju-pty)
├─bash -c...
│ └─bash -c...
│ └─runuser -u riju -- bash -c exec /var/cache/riju/share/riju-pty "$@" -- bash -c...
│ └─riju-pty bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextra main.cpp -o main ) && ( ./main )
│ ├─bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextra main.cpp -o main ) && ( ./main )
│ │ └─main
│ └─riju-pty bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextra main.cpp -o main ) && ( ./main )
│ └─riju-pty bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextra main.cpp -o main ) && ( ./main )
└─bash -c...
└─sleep 1
r
And this:
root@cpp:~/src# ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 15204 11020 ? Ss 03:46 0:00 /usr/bin/python3 -u /usr/local/sbin/my_init --quiet --skip-runit -- bash -c #!/usr/bin/env bash set -euo pipefail umask 0
root 7 0.3 0.0 6532 4016 ? S 03:46 0:00 bash -c #!/usr/bin/env bash set -euo pipefail umask 077 while read -t2 -r cmdline; do cmd=(${cmdline}) for (( i=
root 210 0.0 0.0 6016 952 ? S 03:46 0:00 bash -c #!/usr/bin/env bash set -euo pipefail umask 077 while read -t2 -r cmdline; do cmd=(${cmdline}) for (( i=
root 212 0.0 0.0 6016 2116 ? S 03:46 0:00 bash -c #!/usr/bin/env bash set -euo pipefail umask 077 while read -t2 -r cmdline; do cmd=(${cmdline}) for (( i=
root 214 0.0 0.0 8232 4016 ? S 03:46 0:00 runuser -u riju -- bash -c exec /var/cache/riju/share/riju-pty "$@" -- bash -c set -euo pipefail; stty cols 80 rows 24; ( c
riju 215 0.0 0.0 2376 768 ? S 03:46 0:00 /var/cache/riju/share/riju-pty bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextr
riju 216 0.0 0.0 6148 3648 pts/0 Ss+ 03:46 0:00 bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextra main.cpp -o main ) && ( ./mai
riju 218 0.5 0.0 0 0 ? Z 03:46 0:00 [riju-pty] <defunct>
riju 231 0.7 0.0 6108 1648 pts/0 S+ 03:46 0:00 ./main
root 338 0.0 0.0 6016 956 ? S 03:46 0:00 bash -c #!/usr/bin/env bash set -euo pipefail umask 077 while read -t2 -r cmdline; do cmd=(${cmdline}) for (( i=
root 340 0.0 0.0 6016 2116 ? S 03:46 0:00 bash -c #!/usr/bin/env bash set -euo pipefail umask 077 while read -t2 -r cmdline; do cmd=(${cmdline}) for (( i=
root 341 0.0 0.0 8232 3912 ? S 03:46 0:00 runuser -u riju -- bash -c exec /var/cache/riju/share/riju-pty "$@" -- bash -c set -euo pipefail; stty cols 80 rows 24; ( c
riju 343 0.0 0.0 2376 692 ? S 03:46 0:00 /var/cache/riju/share/riju-pty bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextr
riju 344 0.0 0.0 6148 3632 pts/1 Ss+ 03:46 0:00 bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextra main.cpp -o main ) && ( ./mai
riju 345 0.1 0.0 0 0 ? Z 03:46 0:00 [riju-pty] <defunct>
riju 359 0.1 0.0 6108 1720 pts/1 S+ 03:46 0:00 ./main
root 448 0.0 0.0 6016 956 ? S 03:46 0:00 bash -c #!/usr/bin/env bash set -euo pipefail umask 077 while read -t2 -r cmdline; do cmd=(${cmdline}) for (( i=
root 450 0.0 0.0 6016 2116 ? S 03:46 0:00 bash -c #!/usr/bin/env bash set -euo pipefail umask 077 while read -t2 -r cmdline; do cmd=(${cmdline}) for (( i=
root 454 0.0 0.0 8232 3672 ? S 03:46 0:00 runuser -u riju -- bash -c exec /var/cache/riju/share/riju-pty "$@" -- bash -c set -euo pipefail; stty cols 80 rows 24; ( c
riju 459 0.0 0.0 2376 696 ? S 03:46 0:00 /var/cache/riju/share/riju-pty bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextr
riju 462 0.0 0.0 6148 3728 pts/2 Ss+ 03:46 0:00 bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextra main.cpp -o main ) && ( ./mai
riju 463 0.1 0.0 0 0 ? Z 03:46 0:00 [riju-pty] <defunct>
riju 477 0.2 0.0 6108 1708 pts/2 S+ 03:46 0:00 ./main
root 567 0.0 0.0 6016 956 ? S 03:46 0:00 bash -c #!/usr/bin/env bash set -euo pipefail umask 077 while read -t2 -r cmdline; do cmd=(${cmdline}) for (( i=
root 568 0.0 0.0 6016 2244 ? S 03:46 0:00 bash -c #!/usr/bin/env bash set -euo pipefail umask 077 while read -t2 -r cmdline; do cmd=(${cmdline}) for (( i=
root 569 0.0 0.0 6016 2116 ? S 03:46 0:00 bash -c #!/usr/bin/env bash set -euo pipefail umask 077 while read -t2 -r cmdline; do cmd=(${cmdline}) for (( i=
root 572 0.0 0.0 8232 3968 ? S 03:46 0:00 runuser -u riju -- bash -c exec /var/cache/riju/share/riju-pty "$@" -- bash -c set -euo pipefail; stty cols 80 rows 24; ( c
riju 580 0.0 0.0 2376 756 ? S 03:46 0:00 /var/cache/riju/share/riju-pty bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextr
riju 581 0.0 0.0 6148 3668 pts/3 Ss+ 03:46 0:00 bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextra main.cpp -o main ) && ( ./mai
riju 582 23.7 0.0 2376 84 ? R 03:46 0:16 /var/cache/riju/share/riju-pty bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextr
riju 583 0.0 0.0 2376 84 ? S 03:46 0:00 /var/cache/riju/share/riju-pty bash -c set -euo pipefail; stty cols 80 rows 24; ( clang++ -std=c++17 -pedantic -Wall -Wextr
riju 588 33.8 0.0 6108 1772 pts/3 R+ 03:47 0:22 ./main
root 652 0.1 0.0 6364 4160 pts/4 Ss 03:47 0:00 bash
root 1205 0.0 0.0 4428 768 ? S 03:48 0:00 sleep 1
root 1214 0.0 0.0 8732 3384 pts/4 R+ 03:48 0:00 ps aux
So the user code is not being terminated! That's very bad since it causes CPU to be eaten up forever, until the container is shut down entirely. I found this out after getting paged for sustained CPU usage on Riju.
