lldb Amazon Kindle example

lldb_kindle_ebooks.txt

// Add breakpoint at the place when list of chapters becomes available
(lldb) expr -- void *$class1 = (void *)objc_getClass("ReaderViewController")
(lldb) expr -- void *$sel11=(void *)sel_getUid("didLoadBook")
(lldb) po (void*)class_getMethodImplementation($class1, $sel11)
0x0000000104d3d738
(lldb) b 0x0000000104d3d738
(lldb) с

// - OPEN THE BOOK, WAIT TILL THE PROCESS WILL BE STOPPED

// Get pointer to the list of chapters
(lldb) expr -- NSDictionary* $chapters = ((NSDictionary*)((KfxPagePreviewModel*)[((KfxDocViewController*)((ReaderViewController*)$arg1)->_documentSpecificViewController) pagePreviewModel])->_chapterPositions)

// Get pointer to the first chapter
(lldb) expr -- BookPositionRange* $firstChapter = [((BookPositionRange*)[BookPositionRange alloc]) initWithFirstPosition: ((BookPosition*)[$chapters objectForKey: @1]) lastPosition: ((BookPosition*)[$chapters objectForKey: @2])]

(lldb) c

// Add breakpoint at the place where text of a chunk is fetched for translator
(lldb) expr -- void *$class2 = (void *)objc_getClass("BookTextExtractor")
(lldb) expr -- void *$sel21=(void *)sel_getUid("textInfoForBookPositionRange:usingIterator:")
(lldb) po (void*)class_getMethodImplementation($class2, $sel21)
0x00000001027256dc
(lldb) b 0x00000001027256dc
(lldb) c

// TURN PAGE, WAIT TILL THE PROCESS WILL STOP

// Get pointer to the text of whole chapter
(lldb) expr -- NSString* $text = [((BookTextExtractorInfo*)[((BookTextExtractor*)$arg1) textInfoForBookPositionRange: $firstChapter usingIterator:((KfxWordIterator*)$arg4)]) text]
(lldb) po $text

// HERE WE’LL SEE THE TEXT

// Write NSString with the text of a chapter into a local file
(lldb) expr -- NSString* $firstPath =  [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:@"firstChapter.txt"]
(lldb) po [[NSFileManager defaultManager] createFileAtPath:$firstPath contents:[$text dataUsingEncoding:NSUTF8StringEncoding] attributes:nil];
YES

// AND NOW FULL CHAPTER TEXT WILL BE WRITTEN TO A FILE