fix(test): detect signaled cross-os gateway exits

scripts/openclaw-cross-os-release-checks.ts

@@ -3359,7 +3359,11 @@ async function runDashboardSmoke(params) {
   throw new Error(`Dashboard HTML did not become ready at ${dashboardUrl}.`);
 }
 
-async function stopGateway(gateway) {
+export function hasChildExited(child) {
+  return child.exitCode !== null || (child.signalCode ?? null) !== null;
+}
+
+export async function stopGateway(gateway) {
   try {
     if (!gateway?.child?.pid) {
       return;
@@ -3377,12 +3381,12 @@ async function stopGateway(gateway) {
       }
       return;
     }
-    if (gateway.child.exitCode !== null) {
+    if (hasChildExited(gateway.child)) {
       return;
     }
     gateway.child.kill("SIGTERM");
     const exitedAfterTerm = await waitForChildExit(gateway.child, 2_000);
-    if (!exitedAfterTerm && gateway.child.exitCode === null) {
+    if (!exitedAfterTerm && !hasChildExited(gateway.child)) {
       gateway.child.kill("SIGKILL");
       await waitForChildExit(gateway.child, 5_000);
     }
@@ -3392,7 +3396,7 @@ async function stopGateway(gateway) {
 }
 
 async function waitForChildExit(child, timeoutMs) {
-  if (child.exitCode !== null) {
+  if (hasChildExited(child)) {
     return true;
   }
   return new Promise((resolvePromise) => {

test/scripts/openclaw-cross-os-release-checks.test.ts

@@ -11,7 +11,7 @@ import { createConnection as createNetConnection, createServer as createNetServe
 import { tmpdir } from "node:os";
 import { join, win32 } from "node:path";
 import { setTimeout as delay } from "node:timers/promises";
-import { describe, expect, it } from "vitest";
+import { describe, expect, it, vi } from "vitest";
 import { LOCAL_BUILD_METADATA_DIST_PATHS } from "../../scripts/lib/local-build-metadata-paths.mjs";
 import {
   agentOutputHasExpectedOkMarker,
@@ -40,6 +40,7 @@ import {
   CROSS_OS_DASHBOARD_SMOKE_TIMEOUT_MS,
   CROSS_OS_AGENT_TURN_TIMEOUT_SECONDS,
   CROSS_OS_COMMAND_HEARTBEAT_SECONDS,
+  hasChildExited,
   isImmutableReleaseRef,
   isRecoverableWindowsPackagedUpgradeSwapCleanupFailure,
   isRecoverableWindowsPackagedUpgradeTimeoutError,
@@ -78,6 +79,7 @@ import {
   shouldSkipOptionalCrossOsAgentTurnError,
   shouldUseManagedGatewayForInstallerRuntime,
   shouldUseManagedGatewayService,
+  stopGateway,
   verifyDevUpdateStatus,
   verifyPackagedUpgradeUpdateResult,
   writePackageDistInventoryForCandidate,
@@ -927,6 +929,22 @@ describe("scripts/openclaw-cross-os-release-checks", () => {
     }
   });
 
+  it("treats signaled managed gateway children as exited", async () => {
+    const child = {
+      exitCode: null,
+      kill: vi.fn(),
+      pid: 1234,
+      signalCode: "SIGTERM",
+    };
+    const closeLog = vi.fn();
+
+    expect(hasChildExited(child)).toBe(true);
+    await stopGateway({ child, closeLog });
+
+    expect(child.kill).not.toHaveBeenCalled();
+    expect(closeLog).toHaveBeenCalledTimes(1);
+  });
+
   it("derives the installed prefix from resolved CLI paths", () => {
     expect(
       resolveInstalledPrefixDirFromCliPath(