KVO Workaround

NativeZWRChecker/NativeZWRCheckeriPhone-Info.plist

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleDisplayName</key>
+	<string>${PRODUCT_NAME}</string>
+	<key>CFBundleExecutable</key>
+	<string>${EXECUTABLE_NAME}</string>
+	<key>CFBundleIconFiles</key>
+	<array/>
+	<key>CFBundleIdentifier</key>
+	<string>com.mikeash.${PRODUCT_NAME:rfc1034identifier}</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>${PRODUCT_NAME}</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>1.0</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>armv7</string>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>

NativeZWRChecker/main.m

@@ -0,0 +1,175 @@
+//
+//  main.m
+//  NativeZWRCheckeriPhone
+//
+//  Created by Michael Ash on 10/15/11.
+//  Copyright (c) 2011 __MyCompanyName__. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <CommonCrypto/CommonDigest.h>
+
+#import <dispatch/dispatch.h>
+#import <dlfcn.h>
+#import <objc/runtime.h>
+#import <stdio.h>
+#import <stdlib.h>
+#import <string.h>
+
+
+@implementation NSObject (HackHackHackYourBoat)
+
+- (BOOL)_isDeallocating { return NO; }
+
+@end
+
+static void Check(void)
+{
+    [NSAutoreleasePool new];
+
+    char *badClassNames[] = {
+        "NSProxy",
+        "__NSPlaceholderArray",
+        "NSSubrangeData",
+        "NSJSONSerialization",
+        "NSCGImageSnapshotRep",
+        "FEOpenCLContext",
+        "_PFEncodedData",
+        "NSPropertyListSerialization",
+        "FEContext",
+        "NSPersistentStore",
+        "HICocoaWindowAdapter",
+        "NSApplication",
+        "NSCachedImageRep",
+        "NSCIImageRep",
+        "NSCGImageRep",
+        "NSPasteboard",
+        "NSFileVersion",
+        "NSIconRefImageRep",
+        "NSIconRefBitmapImageRep",
+        "NSColorPanel",
+        "NSFontDescriptor",
+        "NSKnownKeysDictionary",
+        "__NSPlaceholderSet",
+        "NSCustomImageRep",
+        "_NSTemporaryObjectID2",
+        "NSTemporaryObjectID",
+        "NSKeyedUnarchiver",
+        "NSPICTImageRep",
+        "_NSZombie_",
+        "NSKnownKeysMappingStrategy2",
+        "__NSGenericDeallocHandler",
+        "NSPDFImageRep",
+        "NSMessageBuilder",
+        "NSDistributedLock",
+        "NSKeyedArchiver",
+        "__CFNotification",
+        "NSNavFBETopLevelNode",
+        "Protocol",
+        "NSTreeNode",
+        "NSBitmapImageRep",
+        "NSNotification",
+        "NSDocumentRevisionsPlaceholderView",
+        "__NSPlaceholderDictionary",
+        "DDNonTerminal",
+        "NSAtomicStoreCacheNode",
+        "NSViewTemplate",
+        "__NSPlaceholderOrderedSet",
+        "Object",
+        "NSLeafProxy",
+        "__IncompleteProtocol",
+        "NSHTTPCookie",
+        "_PFEncodedString",
+        "NSEPSImageRep",
+        "_PFEncodedArray",
+        "DOMObject",
+        "UIProgressBar",
+        "UIWebTextView",
+        "BasicAccount",
+        "UIWebBrowserView",
+        "UIPasteboard",
+        "_UIDefinitionService",
+        "_UIDateLabelCache",
+        "ABPersonLinker",
+        "WebInspectorWindowController",
+        "UIPrintInteractionController",
+        "_TMBlockDebugger",
+        "UIDocument",
+        "UISplitViewController",
+        "MCDependencyManager",
+        "DADConnection",
+        "UIApplication",
+        "UIPrintInfo",
+        "UIPopoverController",
+        "UIURLResolver",
+        "NSSpeechSynthesizer"
+    };
+
+    void (*NSApplicationLoadFptr)(void) = dlsym(RTLD_DEFAULT, "NSApplicationLoad");
+    if(NSApplicationLoadFptr)
+        NSApplicationLoadFptr();
+
+    int count = objc_getClassList(NULL, 0);
+    Class *classes = malloc(count * sizeof(*classes));
+    objc_getClassList(classes, count);
+
+    NSMutableArray *results = [NSMutableArray array];
+
+    fprintf(stderr, "starting...\n");
+    for(int i = 0; i < count; i++)
+    {
+        Class c = classes[i];
+
+        BOOL isBad = NO;
+        for(Class toCheck = c; toCheck; toCheck = class_getSuperclass(toCheck))
+        {
+            for(unsigned i = 0; i < sizeof(badClassNames) / sizeof(*badClassNames); i++)
+            {
+                if(strcmp(class_getName(toCheck), badClassNames[i]) == 0)
+                    isBad = YES;
+            }
+        }
+        if(isBad)
+            continue;
+
+        id instance = [[c alloc] init];
+
+        BOOL (*allowsWeakReference)(id, SEL);
+        SEL allowsWeakReferenceSEL = @selector(allowsWeakReference);
+        allowsWeakReference = (BOOL (*)(id, SEL))class_getMethodImplementation(c, allowsWeakReferenceSEL);
+        if((IMP)allowsWeakReference != class_getMethodImplementation(c, @selector(thisHadBetterBeUndefinedIReallyHopeSo)))
+        {
+            BOOL allows = allowsWeakReference(instance, allowsWeakReferenceSEL);
+            if(!allows)
+            {
+                const char *name = class_getName(c);
+                NSMutableData *sha = [NSMutableData dataWithLength: CC_SHA1_DIGEST_LENGTH];
+                CC_SHA1(name, (int)strlen(name), [sha mutableBytes]);
+
+                NSDictionary *d = [NSDictionary dictionaryWithObjectsAndKeys:
+                                   sha, @"sha",
+                                   [NSString stringWithUTF8String: name], @"name",
+                                   nil];
+                [results addObject: d];
+            }
+        }
+    }
+    fprintf(stderr, "done!\n");
+
+    NSData *data = [NSPropertyListSerialization dataFromPropertyList: results format: NSPropertyListXMLFormat_v1_0 errorDescription: NULL];
+    [[NSFileHandle fileHandleWithStandardOutput] writeData: data];
+}
+
+int main(int argc, char *argv[])
+{
+    int (*UIApplicationMainFptr)(int, char **, void *, void *) = dlsym(RTLD_DEFAULT, "UIApplicationMain");
+    if(UIApplicationMainFptr)
+    {
+        dispatch_async(dispatch_get_main_queue(), ^{ Check(); });
+        UIApplicationMainFptr(argc, argv, NULL, NULL);
+    }
+    else
+    {
+        Check();
+    }
+}