WebCore的崩潰是否意味着它必然與UIWebView有關？

Question

我的應用程序廣泛使用UIWebViews，因爲它基本上是一個基於WebView的應用程序。

在應用程序的左側，我有一個滑出菜單，類似於Facebook和Path應用程序。選擇其中一個表格行將重新滑入主網頁視圖並加載網址。

我已經看到WebCore從Webthread的隨機崩潰，但我根本無法理解如何解決它。我測試了殭屍和內存分配，但該應用程序始終保持在3-4MB的活動字節數內。

我不知道它是否相關，但當webview加載它的頁面時會出現明顯的「鉤子」。例如，在shouldStartLoad中，我檢查某些URL，然後在頁面上調用一個JS函數。我不知道這是否會導致崩潰。

崩潰日誌顯示webcore崩潰的不同區域。我在下面添加了一些最新的變體，但我不確定這些變體是否都是可能的。

總之，什麼是WebCore崩潰？這是UIWebView中的一個錯誤，我無法做任何事情？謝謝！

Thread 2 name: WebThread 
Thread 2 Crashed: 
0 WebCore       0x32c540c0 WebCore::Document::body() const + 4 
1 WebCore       0x32d04052 WebCore::CachedResourceLoader::preload(WebCore::CachedResource::Type, WTF::String const&, WTF::String const&, bool) + 18 
2 WebCore       0x32d03ebe WebCore::HTMLPreloadScanner::processToken() + 1510 
3 WebCore       0x32d03872 WebCore::HTMLPreloadScanner::scan() + 42 
4 WebCore       0x32cebc24 WebCore::HTMLDocumentParser::append(WebCore::SegmentedString const&) + 92 
5 WebCore       0x32cbce20 WebCore::DecodedDataDocumentParser::appendBytes(WebCore::DocumentWriter*, char const*, int, bool) + 200 
6 WebCore       0x32ceb8d0 WebCore::DocumentWriter::addData(char const*, int, bool) + 48 
7 WebCore       0x32ce5c3e WebCore::DocumentLoader::commitData(char const*, int) + 122 
8 WebKit       0x358cbc9a -[WebHTMLRepresentation receivedData:withDataSource:] + 158 
9 WebKit       0x358cbb10 -[WebDataSource(WebInternal) _receivedData:] + 164 
10 WebKit       0x358cba48 WebFrameLoaderClient::committedLoad(WebCore::DocumentLoader*, char const*, int) + 100 
11 WebCore       0x32ce2a48 WebCore::DocumentLoader::commitLoad(char const*, int) + 120 
12 WebCore       0x32ce29b4 WebCore::DocumentLoader::receivedData(char const*, int) + 72 
13 WebCore       0x32ce25da WebCore::ResourceLoader::didReceiveData(char const*, int, long long, bool) + 34 
14 WebCore       0x32ce2566 WebCore::MainResourceLoader::didReceiveData(char const*, int, long long, bool) + 474 
15 WebCore       0x32ce22b2 WebCore::ResourceLoader::didReceiveData(WebCore::ResourceHandle*, char const*, int, int) + 42 
16 WebCore       0x32ce2234 WebCore::ResourceHandle::handleDataArray(__CFArray const*) + 212 
17 WebCore       0x32ce2156 WebCore::didReceiveDataArray(_CFURLConnection*, __CFArray const*, void const*) + 34 
18 CFNetwork      0x370dd058 URLConnectionClient::_clientDidReceiveData(__CFArray const*, URLConnectionClient::ClientConnectionEventQueue*) + 220 
19 CFNetwork      0x370434b0 URLConnectionClient::ClientConnectionEventQueue::processAllEventsAndConsumePayload(XConnectionEventInfo<XClientEvent, XClientEventParams>*, long) + 436 
20 CFNetwork      0x3704319c URLConnectionClient::processEvents() + 100 
21 CFNetwork      0x370430d2 MultiplexerSource::perform() + 150 
22 CoreFoundation     0x3738aacc __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 8 
23 CoreFoundation     0x3738a32e __CFRunLoopDoSources0 + 358 
24 CoreFoundation     0x3738903e __CFRunLoopRun + 646 
25 CoreFoundation     0x3730c49e CFRunLoopRunSpecific + 294 
26 CoreFoundation     0x3730c366 CFRunLoopRunInMode + 98 
27 WebCore       0x32cb5c9c RunWebThread(void*) + 396 
28 libsystem_c.dylib    0x33c2b72e _pthread_start + 314 
29 libsystem_c.dylib    0x33c2b5e8 thread_start + 0 

OR

Thread 2 name: WebThread 
Thread 2 Crashed: 
0 WebCore       0x32cbe120 WebCore::HTMLDocumentParser::pumpTokenizer(WebCore::HTMLDocumentParser::SynchronousMode) + 312 
1 WebCore       0x32cebc66 WebCore::HTMLDocumentParser::append(WebCore::SegmentedString const&) + 158 
2 WebCore       0x32cbce20 WebCore::DecodedDataDocumentParser::appendBytes(WebCore::DocumentWriter*, char const*, int, bool) + 200 
3 WebCore       0x32ceb8d0 WebCore::DocumentWriter::addData(char const*, int, bool) + 48 
4 WebCore       0x32ce5c3e WebCore::DocumentLoader::commitData(char const*, int) + 122 
5 WebKit       0x358cbc9a -[WebHTMLRepresentation receivedData:withDataSource:] + 158 
6 WebKit       0x358cbb10 -[WebDataSource(WebInternal) _receivedData:] + 164 
7 WebKit       0x358cba48 WebFrameLoaderClient::committedLoad(WebCore::DocumentLoader*, char const*, int) + 100 
8 WebCore       0x32ce2a48 WebCore::DocumentLoader::commitLoad(char const*, int) + 120 
9 WebCore       0x32ce29b4 WebCore::DocumentLoader::receivedData(char const*, int) + 72 
10 WebCore       0x32ce25da WebCore::ResourceLoader::didReceiveData(char const*, int, long long, bool) + 34 
11 WebCore       0x32ce2566 WebCore::MainResourceLoader::didReceiveData(char const*, int, long long, bool) + 474 
12 WebCore       0x32ce22b2 WebCore::ResourceLoader::didReceiveData(WebCore::ResourceHandle*, char const*, int, int) + 42 
13 WebCore       0x32ce2276 WebCore::ResourceHandle::handleDataArray(__CFArray const*) + 278 
14 WebCore       0x32ce2156 WebCore::didReceiveDataArray(_CFURLConnection*, __CFArray const*, void const*) + 34 
15 CFNetwork      0x370dd058 URLConnectionClient::_clientDidReceiveData(__CFArray const*, URLConnectionClient::ClientConnectionEventQueue*) + 220 
16 CFNetwork      0x370434b0 URLConnectionClient::ClientConnectionEventQueue::processAllEventsAndConsumePayload(XConnectionEventInfo<XClientEvent, XClientEventParams>*, long) + 436 
17 CFNetwork      0x37043592 URLConnectionClient::ClientConnectionEventQueue::processAllEventsAndConsumePayload(XConnectionEventInfo<XClientEvent, XClientEventParams>*, long) + 662 
18 CFNetwork      0x3704319c URLConnectionClient::processEvents() + 100 
19 CFNetwork      0x370430d2 MultiplexerSource::perform() + 150 
20 CoreFoundation     0x3738aacc __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 8 
21 CoreFoundation     0x3738a298 __CFRunLoopDoSources0 + 208 
22 CoreFoundation     0x3738903e __CFRunLoopRun + 646 
23 CoreFoundation     0x3730c49e CFRunLoopRunSpecific + 294 
24 CoreFoundation     0x3730c366 CFRunLoopRunInMode + 98 
25 WebCore       0x32cb5c9c RunWebThread(void*) + 396 
26 libsystem_c.dylib    0x33c2b72e _pthread_start + 314 
27 libsystem_c.dylib    0x33c2b5e8 thread_start + 0 

OR

Thread 2 name: WebThread 
Thread 2 Crashed: 
0 JavaScriptCore     0x35653c7c WTF::fastFree(void*) + 80 
1 WebCore       0x32d064b4 WebCore::SegmentedString::prepend(WebCore::SegmentedSubstring const&) + 136 
2 WebCore       0x32d0640e WebCore::SegmentedString::prepend(WebCore::SegmentedString const&) + 66 
3 WebCore       0x32d047a8 WebCore::(anonymous namespace)::unconsumeCharacters(WebCore::SegmentedString&, WTF::Vector<unsigned short, 10ul> const&) + 188 
4 WebCore       0x32cf023e WebCore::consumeHTMLEntity(WebCore::SegmentedString&, WTF::Vector<unsigned short, 16ul>&, bool&, unsigned short) + 1850 
5 WebCore       0x32cef9e4 WebCore::HTMLTokenizer::processEntity(WebCore::SegmentedString&) + 40 
6 WebCore       0x32cbebe8 WebCore::HTMLTokenizer::nextToken(WebCore::SegmentedString&, WebCore::HTMLToken&) + 1232 
7 WebCore       0x32d03894 WebCore::HTMLPreloadScanner::scan() + 76 
8 WebCore       0x32cebc24 WebCore::HTMLDocumentParser::append(WebCore::SegmentedString const&) + 92 
9 WebCore       0x32cbce20 WebCore::DecodedDataDocumentParser::appendBytes(WebCore::DocumentWriter*, char const*, int, bool) + 200 
10 WebCore       0x32ceb8d0 WebCore::DocumentWriter::addData(char const*, int, bool) + 48 
11 WebCore       0x32ce5c3e WebCore::DocumentLoader::commitData(char const*, int) + 122 
12 WebKit       0x358cbc9a -[WebHTMLRepresentation receivedData:withDataSource:] + 158 
13 WebKit       0x358cbb10 -[WebDataSource(WebInternal) _receivedData:] + 164 
14 WebKit       0x358cba48 WebFrameLoaderClient::committedLoad(WebCore::DocumentLoader*, char const*, int) + 100 
15 WebCore       0x32ce2a48 WebCore::DocumentLoader::commitLoad(char const*, int) + 120 
16 WebCore       0x32ce29b4 WebCore::DocumentLoader::receivedData(char const*, int) + 72 
17 WebCore       0x32ce25da WebCore::ResourceLoader::didReceiveData(char const*, int, long long, bool) + 34 
18 WebCore       0x32ce2566 WebCore::MainResourceLoader::didReceiveData(char const*, int, long long, bool) + 474 
19 WebCore       0x32ce22b2 WebCore::ResourceLoader::didReceiveData(WebCore::ResourceHandle*, char const*, int, int) + 42 
20 WebCore       0x32ce2276 WebCore::ResourceHandle::handleDataArray(__CFArray const*) + 278 
21 WebCore       0x32ce2156 WebCore::didReceiveDataArray(_CFURLConnection*, __CFArray const*, void const*) + 34 
22 CFNetwork      0x370dd058 URLConnectionClient::_clientDidReceiveData(__CFArray const*, URLConnectionClient::ClientConnectionEventQueue*) + 220 
23 CFNetwork      0x370434b0 URLConnectionClient::ClientConnectionEventQueue::processAllEventsAndConsumePayload(XConnectionEventInfo<XClientEvent, XClientEventParams>*, long) + 436 
24 CFNetwork      0x3704319c URLConnectionClient::processEvents() + 100 
25 CFNetwork      0x370430d2 MultiplexerSource::perform() + 150 
26 CoreFoundation     0x3738aacc __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 8 
27 CoreFoundation     0x3738a32e __CFRunLoopDoSources0 + 358 
28 CoreFoundation     0x3738903e __CFRunLoopRun + 646 
29 CoreFoundation     0x3730c49e CFRunLoopRunSpecific + 294 
30 CoreFoundation     0x3730c366 CFRunLoopRunInMode + 98 
31 WebCore       0x32cb5c9c RunWebThread(void*) + 396 
32 libsystem_c.dylib    0x33c2b72e _pthread_start + 314 
33 libsystem_c.dylib    0x33c2b5e8 thread_start + 0 

Answer 1

的WebThread由WebKit的管理，並沒有開發商擁有的代碼運行在那裏。我想知道，它是否可以在新的iOS固件上重現？你可以在這個文件上提交雷達報告。