├── PatchSwiftDemo.xcodeproj
    ├── project.pbxproj
    ├── project.xcworkspace
    │   ├── contents.xcworkspacedata
    │   └── xcuserdata
    │   │   └── sunnyxx.xcuserdatad
    │   │       └── UserInterfaceState.xcuserstate
    └── xcuserdata
    │   └── sunnyxx.xcuserdatad
    │       └── xcschemes
    │           ├── PatchSwiftDemo.xcscheme
    │           └── xcschememanagement.plist
├── PatchSwiftDemo
    ├── AppDelegate.h
    ├── AppDelegate.m
    ├── Assets.xcassets
    │   └── AppIcon.appiconset
    │   │   └── Contents.json
    ├── Base.lproj
    │   ├── LaunchScreen.storyboard
    │   └── Main.storyboard
    ├── Info.plist
    ├── PatchSwiftDemo-Bridging-Header.h
    ├── Sark.swift
    ├── TestSark.swift
    ├── ViewController.h
    ├── ViewController.m
    └── main.m
└── README.md


/PatchSwiftDemo.xcodeproj/project.pbxproj:
--------------------------------------------------------------------------------
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341 | 


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8 | 


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57 |             BuildableIdentifier = "primary"
58 |             BlueprintIdentifier = "48F949261D2664680063D8A2"
59 |             BuildableName = "PatchSwiftDemo.app"
60 |             BlueprintName = "PatchSwiftDemo"
61 |             ReferencedContainer = "container:PatchSwiftDemo.xcodeproj">
62 |          </BuildableReference>
63 |       </BuildableProductRunnable>
64 |       <AdditionalOptions>
65 |       </AdditionalOptions>
66 |    </LaunchAction>
67 |    <ProfileAction
68 |       buildConfiguration = "Release"
69 |       shouldUseLaunchSchemeArgsEnv = "YES"
70 |       savedToolIdentifier = ""
71 |       useCustomWorkingDirectory = "NO"
72 |       debugDocumentVersioning = "YES">
73 |       <BuildableProductRunnable
74 |          runnableDebuggingMode = "0">
75 |          <BuildableReference
76 |             BuildableIdentifier = "primary"
77 |             BlueprintIdentifier = "48F949261D2664680063D8A2"
78 |             BuildableName = "PatchSwiftDemo.app"
79 |             BlueprintName = "PatchSwiftDemo"
80 |             ReferencedContainer = "container:PatchSwiftDemo.xcodeproj">
81 |          </BuildableReference>
82 |       </BuildableProductRunnable>
83 |    </ProfileAction>
84 |    <AnalyzeAction
85 |       buildConfiguration = "Debug">
86 |    </AnalyzeAction>
87 |    <ArchiveAction
88 |       buildConfiguration = "Release"
89 |       revealArchiveInOrganizer = "YES">
90 |    </ArchiveAction>
91 | </Scheme>
92 | 


--------------------------------------------------------------------------------
/PatchSwiftDemo.xcodeproj/xcuserdata/sunnyxx.xcuserdatad/xcschemes/xcschememanagement.plist:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>SchemeUserState</key>
 6 | 	<dict>
 7 | 		<key>PatchSwiftDemo.xcscheme</key>
 8 | 		<dict>
 9 | 			<key>orderHint</key>
10 | 			<integer>0</integer>
11 | 		</dict>
12 | 	</dict>
13 | 	<key>SuppressBuildableAutocreation</key>
14 | 	<dict>
15 | 		<key>48F949261D2664680063D8A2</key>
16 | 		<dict>
17 | 			<key>primary</key>
18 | 			<true/>
19 | 		</dict>
20 | 	</dict>
21 | </dict>
22 | </plist>
23 | 


--------------------------------------------------------------------------------
/PatchSwiftDemo/AppDelegate.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.h
 3 | //  PatchSwiftDemo
 4 | //
 5 | //  Created by sunnyxx on 16/7/1.
 6 | //  Copyright © 2016年 sunnyxx. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | @interface AppDelegate : UIResponder <UIApplicationDelegate>
12 | 
13 | @property (strong, nonatomic) UIWindow *window;
14 | 
15 | 
16 | @end
17 | 
18 | 


--------------------------------------------------------------------------------
/PatchSwiftDemo/AppDelegate.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.m
 3 | //  PatchSwiftDemo
 4 | //
 5 | //  Created by sunnyxx on 16/7/1.
 6 | //  Copyright © 2016年 sunnyxx. All rights reserved.
 7 | //
 8 | 
 9 | #import "AppDelegate.h"
10 | 
11 | @interface AppDelegate ()
12 | 
13 | @end
14 | 
15 | @implementation AppDelegate
16 | 
17 | 
18 | - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
19 |     // Override point for customization after application launch.
20 |     return YES;
21 | }
22 | 
23 | - (void)applicationWillResignActive:(UIApplication *)application {
24 |     // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
25 |     // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
26 | }
27 | 
28 | - (void)applicationDidEnterBackground:(UIApplication *)application {
29 |     // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
30 |     // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
31 | }
32 | 
33 | - (void)applicationWillEnterForeground:(UIApplication *)application {
34 |     // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
35 | }
36 | 
37 | - (void)applicationDidBecomeActive:(UIApplication *)application {
38 |     // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
39 | }
40 | 
41 | - (void)applicationWillTerminate:(UIApplication *)application {
42 |     // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
43 | }
44 | 
45 | @end
46 | 


--------------------------------------------------------------------------------
/PatchSwiftDemo/Assets.xcassets/AppIcon.appiconset/Contents.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "images" : [
 3 |     {
 4 |       "idiom" : "iphone",
 5 |       "size" : "29x29",
 6 |       "scale" : "2x"
 7 |     },
 8 |     {
 9 |       "idiom" : "iphone",
10 |       "size" : "29x29",
11 |       "scale" : "3x"
12 |     },
13 |     {
14 |       "idiom" : "iphone",
15 |       "size" : "40x40",
16 |       "scale" : "2x"
17 |     },
18 |     {
19 |       "idiom" : "iphone",
20 |       "size" : "40x40",
21 |       "scale" : "3x"
22 |     },
23 |     {
24 |       "idiom" : "iphone",
25 |       "size" : "60x60",
26 |       "scale" : "2x"
27 |     },
28 |     {
29 |       "idiom" : "iphone",
30 |       "size" : "60x60",
31 |       "scale" : "3x"
32 |     },
33 |     {
34 |       "idiom" : "ipad",
35 |       "size" : "29x29",
36 |       "scale" : "1x"
37 |     },
38 |     {
39 |       "idiom" : "ipad",
40 |       "size" : "29x29",
41 |       "scale" : "2x"
42 |     },
43 |     {
44 |       "idiom" : "ipad",
45 |       "size" : "40x40",
46 |       "scale" : "1x"
47 |     },
48 |     {
49 |       "idiom" : "ipad",
50 |       "size" : "40x40",
51 |       "scale" : "2x"
52 |     },
53 |     {
54 |       "idiom" : "ipad",
55 |       "size" : "76x76",
56 |       "scale" : "1x"
57 |     },
58 |     {
59 |       "idiom" : "ipad",
60 |       "size" : "76x76",
61 |       "scale" : "2x"
62 |     }
63 |   ],
64 |   "info" : {
65 |     "version" : 1,
66 |     "author" : "xcode"
67 |   }
68 | }


--------------------------------------------------------------------------------
/PatchSwiftDemo/Base.lproj/LaunchScreen.storyboard:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="8150" systemVersion="15A204g" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" initialViewController="01J-lp-oVM">
 3 |     <dependencies>
 4 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="8122"/>
 5 |     </dependencies>
 6 |     <scenes>
 7 |         <!--View Controller-->
 8 |         <scene sceneID="EHf-IW-A2E">
 9 |             <objects>
10 |                 <viewController id="01J-lp-oVM" sceneMemberID="viewController">
11 |                     <layoutGuides>
12 |                         <viewControllerLayoutGuide type="top" id="Llm-lL-Icb"/>
13 |                         <viewControllerLayoutGuide type="bottom" id="xb3-aO-Qok"/>
14 |                     </layoutGuides>
15 |                     <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
16 |                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
17 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
18 |                         <animations/>
19 |                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
20 |                     </view>
21 |                 </viewController>
22 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
23 |             </objects>
24 |             <point key="canvasLocation" x="53" y="375"/>
25 |         </scene>
26 |     </scenes>
27 | </document>
28 | 


--------------------------------------------------------------------------------
/PatchSwiftDemo/Base.lproj/Main.storyboard:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
 3 |     <dependencies>
 4 |         <deployment identifier="iOS"/>
 5 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
 6 |     </dependencies>
 7 |     <scenes>
 8 |         <!--View Controller-->
 9 |         <scene sceneID="tne-QT-ifu">
10 |             <objects>
11 |                 <viewController id="BYZ-38-t0r" customClass="ViewController" sceneMemberID="viewController">
12 |                     <layoutGuides>
13 |                         <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
14 |                         <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
15 |                     </layoutGuides>
16 |                     <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
17 |                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
18 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
19 |                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
20 |                     </view>
21 |                 </viewController>
22 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
23 |             </objects>
24 |         </scene>
25 |     </scenes>
26 | </document>
27 | 


--------------------------------------------------------------------------------
/PatchSwiftDemo/Info.plist:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>CFBundleDevelopmentRegion</key>
 6 | 	<string>en</string>
 7 | 	<key>CFBundleExecutable</key>
 8 | 	<string>$(EXECUTABLE_NAME)</string>
 9 | 	<key>CFBundleIdentifier</key>
10 | 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
11 | 	<key>CFBundleInfoDictionaryVersion</key>
12 | 	<string>6.0</string>
13 | 	<key>CFBundleName</key>
14 | 	<string>$(PRODUCT_NAME)</string>
15 | 	<key>CFBundlePackageType</key>
16 | 	<string>APPL</string>
17 | 	<key>CFBundleShortVersionString</key>
18 | 	<string>1.0</string>
19 | 	<key>CFBundleSignature</key>
20 | 	<string>????</string>
21 | 	<key>CFBundleVersion</key>
22 | 	<string>1</string>
23 | 	<key>LSRequiresIPhoneOS</key>
24 | 	<true/>
25 | 	<key>UILaunchStoryboardName</key>
26 | 	<string>LaunchScreen</string>
27 | 	<key>UIMainStoryboardFile</key>
28 | 	<string>Main</string>
29 | 	<key>UIRequiredDeviceCapabilities</key>
30 | 	<array>
31 | 		<string>armv7</string>
32 | 	</array>
33 | 	<key>UISupportedInterfaceOrientations</key>
34 | 	<array>
35 | 		<string>UIInterfaceOrientationPortrait</string>
36 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
37 | 		<string>UIInterfaceOrientationLandscapeRight</string>
38 | 	</array>
39 | 	<key>UISupportedInterfaceOrientations~ipad</key>
40 | 	<array>
41 | 		<string>UIInterfaceOrientationPortrait</string>
42 | 		<string>UIInterfaceOrientationPortraitUpsideDown</string>
43 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
44 | 		<string>UIInterfaceOrientationLandscapeRight</string>
45 | 	</array>
46 | </dict>
47 | </plist>
48 | 


--------------------------------------------------------------------------------
/PatchSwiftDemo/PatchSwiftDemo-Bridging-Header.h:
--------------------------------------------------------------------------------
1 | //
2 | //  Use this file to import your target's public headers that you would like to expose to Swift.
3 | //
4 | 
5 | // in main.m
6 | extern void patchSwift(void);


--------------------------------------------------------------------------------
/PatchSwiftDemo/Sark.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  Sark.swift
 3 | //  PatchSwiftDemo
 4 | //
 5 | //  Created by sunnyxx on 16/6/23.
 6 | //  Copyright © 2016年 sunnyxx. All rights reserved.
 7 | //
 8 | 
 9 | import Foundation
10 | 
11 | // Patch 目标类，这是一个非继承 NSObject 的 Swift Class
12 | class Sark {
13 |     func foo(bar: Int) -> Int {
14 |         return bar;
15 |     }
16 | }
17 | 


--------------------------------------------------------------------------------
/PatchSwiftDemo/TestSark.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  Main.swift
 3 | //  PatchSwiftDemo
 4 | //
 5 | //  Created by sunnyxx on 16/7/1.
 6 | //  Copyright © 2016年 sunnyxx. All rights reserved.
 7 | //
 8 | 
 9 | import Foundation
10 | 
11 | @objc class TestSark : NSObject {
12 |     class func test() {
13 |         let sark = Sark()
14 |         // before patch
15 |         let orig = sark.foo(123);
16 |         print("orig: \(orig)"); // print 123
17 |         
18 |         patchSwift() // in main.m
19 |         
20 |         // after patch
21 |         let patched = sark.foo(123);
22 |         print("patched: \(patched)"); // print 123 * 123
23 |     }
24 | }


--------------------------------------------------------------------------------
/PatchSwiftDemo/ViewController.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  ViewController.h
 3 | //  PatchSwiftDemo
 4 | //
 5 | //  Created by sunnyxx on 16/7/1.
 6 | //  Copyright © 2016年 sunnyxx. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | @interface ViewController : UIViewController
12 | 
13 | 
14 | @end
15 | 
16 | 


--------------------------------------------------------------------------------
/PatchSwiftDemo/ViewController.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  ViewController.m
 3 | //  PatchSwiftDemo
 4 | //
 5 | //  Created by sunnyxx on 16/7/1.
 6 | //  Copyright © 2016年 sunnyxx. All rights reserved.
 7 | //
 8 | 
 9 | #import "ViewController.h"
10 | 
11 | @interface ViewController ()
12 | 
13 | @end
14 | 
15 | @implementation ViewController
16 | 
17 | - (void)viewDidLoad {
18 |     [super viewDidLoad];
19 |     // Do any additional setup after loading the view, typically from a nib.
20 | }
21 | 
22 | - (void)didReceiveMemoryWarning {
23 |     [super didReceiveMemoryWarning];
24 |     // Dispose of any resources that can be recreated.
25 | }
26 | 
27 | @end
28 | 


--------------------------------------------------------------------------------
/PatchSwiftDemo/main.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  main.m
 3 | //  PatchSwiftDemo
 4 | //
 5 | //  Created by sunnyxx on 16/7/1.
 6 | //  Copyright © 2016年 sunnyxx. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | #import "AppDelegate.h"
11 | #import <dlfcn.h>
12 | #import <sys/mman.h>
13 | #import "PatchSwiftDemo-Swift.h"
14 | 
15 | // patch Sark.foo(bar)
16 | int patchedFunction(int bar) {
17 |     return bar * bar;
18 | }
19 | 
20 | // called in TestSark.swift
21 | void patchSwift(void) {
22 |     
23 |     // 根据符号获取要 patch swift 方法地址
24 |     void *handle = dlopen(NULL/* current image */, RTLD_GLOBAL);
25 |     // 这个符号 nm 取到的，dlsym 会在符号前加下划线
26 |     // 根据 swift name mangling 可以动态生成这个串
27 |     int64_t *swiftFunc = dlsym(handle, "_TFC14PatchSwiftDemo4Sark3foofSiSi");
28 |     int64_t *newFunc = (int64_t *)&patchedFunction;
29 |     
30 |     // 原函数和 patch 函数的 offset
31 |     int64_t offset = (int64_t)newFunc - ((int64_t)swiftFunc + 5 * sizeof(char));
32 |     
33 |     // 将代码区这个 page 改成可写
34 |     size_t pageSize = sysconf(_SC_PAGESIZE);
35 |     uintptr_t start = (uintptr_t)swiftFunc;
36 |     uintptr_t end = start + 1;
37 |     uintptr_t pageStart = start & -pageSize;
38 |     // 注意，这个方法在非越狱 iOS 真机被禁用
39 |     mprotect((void *)pageStart, end - pageStart, PROT_READ | PROT_WRITE | PROT_EXEC);
40 | 
41 |     // swift 函数第一行指令改成 jmp offset
42 |     int64_t instruction = 0xe9 | offset << 8;
43 |     *swiftFunc = instruction;
44 | }
45 | 
46 | int main(int argc, char * argv[]) {
47 |     @autoreleasepool {
48 |         [TestSark test]; // call swift
49 |         return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
50 |     }
51 | }
52 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | 使用 `mprotect` Patch 纯 Swift 方法的 Demo，真机不可用 
 2 | 
 3 | ``` objc
 4 | void patchSwift(void) {
 5 |     
 6 |     // 根据符号获取要 patch swift 方法地址
 7 |     void *handle = dlopen(NULL/* current image */, RTLD_GLOBAL);
 8 |     // 这个符号 nm 取到的，dlsym 会在符号前加下划线
 9 |     // 根据 swift name mangling 可以动态生成这个串
10 |     int64_t *swiftFunc = dlsym(handle, "_TFC14PatchSwiftDemo4Sark3foofSiSi");
11 |     int64_t *newFunc = (int64_t *)&patchedFunction;
12 |     
13 |     // 原函数和 patch 函数的 offset
14 |     int64_t offset = (int64_t)newFunc - ((int64_t)swiftFunc + 5 * sizeof(char));
15 |     
16 |     // 将代码区这个 page 改成可写
17 |     size_t pageSize = sysconf(_SC_PAGESIZE);
18 |     uintptr_t start = (uintptr_t)swiftFunc;
19 |     uintptr_t end = start + 1;
20 |     uintptr_t pageStart = start & -pageSize;
21 |     // 注意，这个方法在非越狱 iOS 真机被禁用
22 |     mprotect((void *)pageStart, end - pageStart, PROT_READ | PROT_WRITE | PROT_EXEC);
23 | 
24 |     // swift 函数第一行指令改成 jmp offset
25 |     int64_t instruction = 0xe9 | offset << 8;
26 |     *swiftFunc = instruction;
27 | }
28 | ```


--------------------------------------------------------------------------------