IOS Safari reading mode analysis process

IOS Safari reading mode analysis process
This article is a record of the analysis process of Safari reading mode, which is not well organized. For the final output, see another iOS Safari reading mode study. 1. break on evaluateb JSC: evaluate (JSC: ExecState *, JSC: ScopeChainNode *, JSC: SourceCode const &, JSC: JSValue, JSC: JSValue *) dump the source content from JSC: SourceCode
Printing description of source. m_provider.m_ptr-> m_url:
(WTF: String) m_url = {length = 0, contents = ''}{
M_impl = {
M_ptr = 0x0000000000000000 {length = 0, is8bit = 0, contents = ''}
}
}
Printing description of source. m_provider.m_ptr-> m_source:
(WTF: String) m_source = {length = 66370, contents = '/*
* Copyright©2010 Apple Inc. All rights reserved.
*/...... 2. Call Stack 3.(Lldb) Image list[0] 396DF4E9-18D6-3C39-B1FB-E783D7F9B947Zero x 00001000/Applications/Xcode. app/Contents/Developer/Platforms/iPhoneSimulator. platform/Developer/SDKs/iPhoneSimulator6.1.sdk/Applications/MobileSafari. app/MobileSafari-> browse (0x702a5)-> 0x6fdc8 (0x6fe19)-> 0x6fd9a (0x6fdb5)-> XREF:-[ReaderTestProcessor _ processReaderTestResult: tabDocument:] &-[ReaderContext isReaderAvailable] 0x6eac5 (0x6eae5)->-[ReaderContext isReaderAvailable] 0xa3d84 (0xa3dd3)-> XREF:-[TabDocument _ signature] HandleRunSource I. find the starting point 3483-> 0xa3d15-[TabDocument _ detectReaderAvailabilityOnWebThread] 3490-> 0xa3f56 (0xa404b)-[TabDocument_detectReaderAvailabilityNow] ii. who initiated _ detectReaderAvailabilityNow-[BrowserController stopFromAddressView:]-[TabDocument _ progressDidStall]-[TabDocument webView: didFinishLoadForFrame:] ->-[TabDocument detectReaderAvailabilitySoon] 3496-> 0xa4279-[TabDocument succeeded] 3274-> 0x9c16b (0x9c1ad)-[TabDocument webView: didFinishLoadForFrame:] 4. (FAILED)B-[UIView setHidden:](Lldb) ShowParameters 3
$56 = 0x09a43aa0 >
0x08d60840: "setHidden :" 5. B-[UIView setFrame:](Lldb) ShowParameters 3
$26 = 0x0a984730 >
0x07b37881: "setFrame :"
0x07b3788b: "addSubview:" 96-> 0x6d38 (0x6f9d):-[AddressView _ blank: forEditing: textField: showInactiveFieldWhileEditing:] 257-> 0x126a4 (0x1288a ): -[AddressView layoutReaderButton] 3482-> 0xa3927 (0xa3caf):-[TabDocument _ partition:] 3485-> 0xa3e3f (0xa3e6b): (MEM: partition)-[AddressViewaccessibility (SafeCategory) layoutReaderButton] 6. (FAILED) according to the WebKit Objective-C Programming Guide, to obtain JS data, you must first obtain the window object: Id win = [webview windowScriptObject];And all JS objects are packaged using WebScriptObject. Summary: webcore'-[WebScriptObject valueForKey:] Address: WebCore [0x00d35b30] (WebCore. _ TEXT. _ text + 13843984) (Lldb) B webcore'-[WebScriptObject valueForKey:]
Breakpoint 14: where = webcore'-[WebScriptObject valueForKey:], address = 0x03581700 7. tabDocument:-(void) _ region; // IMP = 0x000a3f56-(void) _ region; // IMP = 0x000a3d15-(void) _ didDetectReaderAvailability :( BOOL) arg1; // IMP = 0x000a3927 8.var ReaderArticleFinderJS = new ReaderArticleFinder (document ); 6fdc8 (6fe24)-> 1b3ba (1b3d6)-> isReaderModeAvailable  9. breakJSObjectGetProperty (Lldb) P/X' * (int *) ($ ebp + 16 )'
(Int) $33 = 0x000debdf
(Lldb) Mem read '$33'
0x000debdf: 69 73 52 65 61 64 65 72 4d 6f 64 65 41 76 61 69 isReaderModeAvai
0x000debef: 6c 61 62 6c 65 00 70 72 65 70 61 72 65 54 6f 54 lable. prepareToT 10. you also need to get the object 450-> 0x1b774 (0x1b777)-> returnReaderArticleFinderJS1656-> 0x5a70c (0x5a76e)-> 2193-> 0x70224 (0x70315) -> 2186-> 0x6fdc8 (0x6fe19)-> 2185-> 0x6fd9a (0x6fdb5)-> XREF:-[ReaderTestProcessor _ processReaderTestResult: tabDocument:] &-[ReaderContext isReaderAvailable] 2125-> 0x6eac5 (0x6eae5)->-[ReaderContext isReaderA Vailable] 3484-> 0xa3d84 (0xa3dd3)-> XREF:-[TabDocument _ detectReaderAvailabilityOnWebThread] 11. click the "Reader" button0.. confirm again Reader Mode 2193-> 0x70224 (0x702a5) 2186-> 0x6fdc8 (0x6fe19) 2195-> 0x70372 (0x70387) WebThreadLock, call 6fdc8. 2146-> 0x6f3cd (0x6f3f1)->-[ReaderContext createArticleFinder] 978-> 0x38445 (0x384f5) [BrowserController setShowingReader: animated] 122-> 0x995c (0x99bc) -> bShowing = [[ BrowserControllersharedBrowserController] isShowingReader]; [[BrowserControllersharedBrowserController] setShowingReader: bShowing animated: YES] B. display content I. load html file-> loadRequest (Reader ~ Ipad.html) 2132-> 0x6ee1e (0x6ee96) [ReaderContextloadReaderDocument] 2118-> 0x6e85b (0x6e959) [ReaderContext createWebViewIfNeeded] 3491-> 0xa4053 (0xa4097) [TabDocumentcreateBrowserReaderViewIfNeeded] 979-> 0x38549 (0x38610) [BrowserControllershowReaderForTabDocument] 978-> 0x38445 (0x38526) [BrowserController setShowingReader: animated] 122-> 0x995c (0x99bc) bShowing = [[BrowserControllersharedBrowserController] isShowingReader]; [[BrowserControllersharedBrowserController] setShowingReader: bShowing animated: YES] ii. when WebView allows window object modification, execute the Read mode processing script 2205-> 0x705ce (0x7066f) 2127-> 0x6eb17 (0x6eb62)-[ReaderContext initReaderJSController:] 1296-> 0x4952c (0x49588) [BrowserReaderViewuiWebView: didClearWindowObject: forFrame] iii. after the page is loaded, the following JavaScript code is executed: