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@@ -1,4 +1,4 @@
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-import { existsSync, readdirSync, realpathSync, statSync } from 'node:fs'
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+import { existsSync, readdirSync, realpathSync, rmSync, statSync, writeFileSync } from 'node:fs'
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import { mkdtemp, writeFile } from 'node:fs/promises'
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import { tmpdir } from 'node:os'
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import { basename, dirname, join } from 'node:path'
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@@ -638,6 +638,26 @@ describe('PythonCodeRuntime — inherited resource limits', () => {
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expect(result.value).toBeUndefined()
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}, 20_000)
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+ it('reports a timeout when the interpreter was started with SIGXCPU ignored (inherited state)', async () => {
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+ // The child inherits the host's SIGXCPU disposition: a wrapper that
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+ // ignores SIGXCPU before exec'ing python3 hands the child a soft
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+ // RLIMIT_CPU that cannot stop it. The bootstrap resets SIGXCPU to SIG_DFL
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+ // before model code runs, so a busy loop still ends as a timeout rather
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+ // than running to the hard limit and being misclassified as worker-exit.
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+ const wrapper = join(tmpdir(), `dsh-xcpu-ignore-${process.pid}.sh`)
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+ writeFileSync(wrapper, '#!/bin/sh\ntrap "" XCPU\nexec python3 "$@"\n', { mode: 0o755 })
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+ try {
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+ const { runtime } = await setup({ maxWallMs: 30_000, cpuSeconds: 1, pythonBin: wrapper })
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+ const result = await runtime.run({
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+ program: ['while True: pass'].join('\n'),
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+ bindings: [],
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+ })
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+ expect(result.error?.kind).toBe('timeout')
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+ } finally {
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+ rmSync(wrapper, { force: true })
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+ }
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+ }, 20_000)
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+
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it('reports a timeout when a program traps AND masks SIGXCPU and returns past the soft limit', async () => {
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// The mask-only case exercises the unblock; the trap+mask combination is
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// the harder one: a program that installed a custom handler AND masked the
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