Function probeIsolatedVm

packages/ai-isolate-node/src/isolate-driver.ts:42–75

* Probe isolated-vm in a subprocess to detect native addon incompatibilities. * An incompatible build (e.g. compiled for a different Node.js version) will * segfault the process — a crash that no JS error handling can catch. * Running the probe in a child process lets us detect this safely.

()

 * Running the probe in a child process lets us detect this safely.
 */
function probeIsolatedVm(): { compatible: boolean; error?: string } {
  if (_probeResult) return _probeResult

  try {
    const esmRequire = createRequire(import.meta.url)
    const ivmPath = esmRequire.resolve('isolated-vm')
    const result = spawnSync(
      process.execPath,
      [
        '-e',
        `const ivm = require(${JSON.stringify(ivmPath)}); new ivm.Isolate({ memoryLimit: 8 }).dispose(); process.exit(0)`,
      ],
      { timeout: 10_000, encoding: 'utf8' },
    )

    if (result.status === 0) {
      _probeResult = { compatible: true }
    } else {
      const signal = result.signal ? ` (signal: ${result.signal})` : ''
      const stderr = result.stderr.trim() ? `\n${result.stderr.trim()}` : ''
      _probeResult = {
        compatible: false,
        error: `isolated-vm probe exited with code ${result.status}${signal}${stderr}`,
      }
    }
  } catch (err) {
    _probeResult = {
      compatible: false,
      error: `Failed to probe isolated-vm: ${err instanceof Error ? err.message : String(err)}`,
    }
  }

  return _probeResult
}

export { probeIsolatedVm }