judge: add stack size report

packages/hydrojudge/src/info.ts

@@ -0,0 +1,28 @@
+import { LangConfig } from '@hydrooj/utils/lib/lang';
+import { runQueued } from './sandbox';
+
+export async function compilerVersions(langs: Record<string, LangConfig>) {
+    const result = {};
+    for (const lang in langs) {
+        const version = langs[lang].version;
+        if (!version) continue;
+        // eslint-disable-next-line no-await-in-loop
+        const res = await runQueued(version, {
+            copyIn: {},
+            time: 10000,
+            memory: 256,
+        }, 'compilerVersions', 5);
+        result[lang] = `${res.stdout}\n${res.stderr}`.trim();
+    }
+    return result;
+}
+
+export async function stackSize() {
+    const res = await runQueued('/bin/bash -c "ulimit -s"', {
+        copyIn: {},
+        time: 10000,
+        memory: 256,
+    }, 'stackSize', 5);
+    if (res.stderr) return -1;
+    return +res.stdout;
+}