我们有一个混合式iOS应用程序,其中包含一个UIWebView,可以加载一个相当复杂的网店(一堆跟踪像素、JavaScript、异步行为)。自iOS 11.3推出以来,我们发现有很多崩溃似乎来自UIWebView或相关组件。堆栈跟踪看起来像这样
Crashed: WebThread
0 WebCore 0x18b7b0d98 WebCore::Page::sessionID() const + 162
1 WebKitLegacy 0x18be91204 WebFrameNetworkingContext::storageSession() const + 24
2 WebCore 0x18ad818bc WebCore::ResourceHandle::willSendRequest(WebCore::ResourceRequest&&, WebCore::ResourceResponse&&, WTF::CompletionHandler<void (WebCore::ResourceRequest&&)>&&) + 1012
3 WebCore 0x18ad86f88 WTF::Function<void ()>::CallableWrapper<-[WebCoreResourceHandleAsOperationQueueDelegate connection:willSendRequest:redirectResponse:]::$_1>::call() + 208
4 JavaScriptCore 0x1892157d4 WTF::dispatchFunctionsFromMainThread() + 344
5 Foundation 0x1830fe0ec __NSThreadPerformPerform + 340
6 CoreFoundation 0x18265b404 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
7 CoreFoundation 0x18265ac2c __CFRunLoopDoSources0 + 276
8 CoreFoundation 0x18265879c __CFRunLoopRun + 1204
9 CoreFoundation 0x182578da8 CFRunLoopRunSpecific + 552
10 WebCore 0x18a805dcc RunWebThread(void*) + 592
11 libsystem_pthread.dylib 0x1822d9220 _pthread_body + 272
12 libsystem_pthread.dylib 0x1822d9110 _pthread_body + 290
13 libsystem_pthread.dylib 0x1822d7b10 thread_start + 4
我们无法找到代码路径,怀疑是UIWebView的JavaScript运行时触发了该错误,但我们目前没有更好的想法。