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Add TLE example #3

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Merged
joshjms merged 2 commits into from
Jan 31, 2026
Merged

Add TLE example #3

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0674de0
set soft and hard rlimits
joshjms Jan 31, 2026
ab021bd
add tle example
joshjms Jan 31, 2026
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18 changes: 9 additions & 9 deletions src/run.c
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Original file line number Diff line number Diff line change
Expand Up @@ -45,7 +45,7 @@ static int child_fn(void *arg);
static int setup_rootfs_without_overlayfs(const ExecRequest *cfg, const char *ctr_dir);
static int setup_rootfs_with_overlayfs(const ExecRequest *cfg, const char *ctr_dir);
static int drop_all_caps(void);
static void set_limit(int resource, rlim_t lim);
static void set_limit(int resource, rlim_t soft, rlim_t hard);

// socket helpers
static int write_byte(int fd, char b);
Expand Down Expand Up @@ -909,11 +909,11 @@ static int child_fn(void *arg) {
}

// setrlimits
set_limit(RLIMIT_NOFILE, cfg->max_open_files);
set_limit(RLIMIT_STACK, cfg->stack_limit_bytes);
set_limit(RLIMIT_AS, cfg->memory_limit_bytes);
set_limit(RLIMIT_FSIZE, cfg->output_limit_bytes);
set_limit(RLIMIT_CPU, (cfg->cpu_time_limit_us + 999999) / 1000000);
set_limit(RLIMIT_NOFILE, cfg->max_open_files, cfg->max_open_files);
set_limit(RLIMIT_STACK, cfg->stack_limit_bytes, cfg->stack_limit_bytes);
set_limit(RLIMIT_AS, cfg->memory_limit_bytes, cfg->memory_limit_bytes);
set_limit(RLIMIT_FSIZE, cfg->output_limit_bytes, cfg->output_limit_bytes);
set_limit(RLIMIT_CPU, (cfg->cpu_time_limit_us + 999999) / 1000000, (cfg->cpu_time_limit_us + 999999) / 1000000);

// change root
char *new_root = join_paths(dir, "root");
Expand Down Expand Up @@ -1309,10 +1309,10 @@ static int drop_all_caps(void) {
return 0;
}

static void set_limit(int resource, rlim_t lim) {
static void set_limit(int resource, rlim_t soft, rlim_t hard) {
struct rlimit rl = {
.rlim_cur = lim,
.rlim_max = lim * 2,
.rlim_cur = soft,
.rlim_max = hard,
};
setrlimit(resource, &rl);
}
Expand Down
11 changes: 11 additions & 0 deletions tests/test_files/time_limit_exceeded.cpp
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Original file line number Diff line number Diff line change
@@ -0,0 +1,11 @@
#include <bits/stdc++.h>
using namespace std;

int main() {
while(1) {
volatile int t = 1;
t++;
}

return 0;
}