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itrace's Introduction

itrace

Trace objc method call for ios and mac

如果你想逆向 某些app的调用流程 或者 系统app的一些功能的 私有 framework class api 调用流程, 可以试试此工具

只需要 配置需要挂接的 类名和app名, 就可以实时追踪 相关功能的 调用流程。 支持批量 hook n多个类名

特性

  • 批量跟踪ios下指定class对象的所有调用流程
  • 支持ios for armv6,armv7,arm64 以及mac for x86, x64
  • 自动探测参数类型,并且打印所有参数的详细信息

更新内容

  • 增加对arm64的支持,刚调通稳定性有待测试。 arm64进程注入没时间做了,暂时用了substrate的hookprocess, 所以大家需要先装下libsubstrate.dylib armv7的版本是完全不依赖substrate的。

  • arm64的版本对参数的信息打印稍微做了些增强。

注:此项目已不再维护,仅供参考。

  1. 配置需要挂接的class

    修改itrace.xml配置文件,增加需要hook的类名:
    <?xml version="1.0" encoding="utf-8"?>
    <itrace>
      <class>
        <SSDevice/>
        <SSDownload/>
        <SSDownloadManager/>
        <SSDownloadQueue/>
        <CPDistributedMessagingCenter/>
        <CPDistributedNotificationCenter/>
        <NSString args="0"/>
      </class>
    </itrace>
    

    注: 尽量不要去hook, 频繁调用的class, 比如 UIView NSString, 否则会很卡,操作就不方便了。 注: 如果挂接某个class, 中途打印参数信息挂了, 可以在对应的类名后面 加上 args="0" 属性, 来禁止打印参数信息, 这样会稳定点。 如果要让所有类都不打印参数信息, 可以直接设置:

  2. 安装文件

    将整个itracer目录下的所有文件用手机助手工具,上传到ios系统上的 /tmp 下面:

    /tmp/itracer
    /tmp/itrace.dylib
    /tmp/itrace.xml
    
  3. 进行trace

    进入itracer所在目录:

      cd /tmp
    

    修改执行权限:

      chmod 777 ./itracer
    

    运行程序:

      ./itracer springboard (spingboard 为需要挂接的进程名, 支持简单的模糊匹配)
    
  4. 使用substrate进行注入itrace.dylib来trace

    在ios arm64的新设备上,使用itracer注入itrace.dylib已经失效,最近一直没怎么去维护,如果要在在arm64上注入进行trace,可以借用substrate,将itrace.dylib作为substrate插件进行注入 再配置下itrace.plist指定需要注入到那个进程中就行了,具体可以看下substrate的插件相关文档。

    放置itrace.dylibitrace.plist到substrate插件目录/Library/MobileSubstrate/DynamicLibraries,放好后使用ldid -S itrace.dylib处理一下,然后重启需要trace的进程即可, itrace.xml的配置文件路径变为/var/root/itrace/itrace.xml

    ios arm64设备的itrace.dylib 编译时使用 xmake f -p iphoneos -a arm64命令。

  5. 查看 trace log, 注: log 的实际输出在: 控制台-设备log 中:

    Jan 21 11:12:58 unknown SpringBoard[5706] <Warning>: [itrace]: [3edc9d98]: [SSDownloadQueue downloads]
    Jan 21 11:12:58 unknown SpringBoard[5706] <Warning>: [itrace]: [3edc9d98]: [SSDownloadManager downloads]
    Jan 21 11:12:58 unknown SpringBoard[5706] <Warning>: [itrace]: [3edc9d98]: [SSDownloadManager _copyDownloads]
    Jan 21 11:12:58 unknown SpringBoard[5706] <Warning>: [itrace]: [3edc9d98]: [SSDownloadQueue _sendDownloadStatusChangedAtIndex:]: 0
    Jan 21 11:12:58 unknown SpringBoard[5706] <Warning>: [itrace]: [3edc9d98]: [SSDownloadQueue _messageObserversWithFunction:context:]: 0x334c5d51: 0x2fe89de0
    Jan 21 11:12:58 unknown SpringBoard[5706] <Warning>: [itrace]: [3edc9d98]: [SSDownloadQueue downloads]
    Jan 21 11:12:58 unknown SpringBoard[5706] <Warning>: [itrace]: [3edc9d98]: [SSDownloadManager downloads]
    Jan 21 11:12:58 unknown SpringBoard[5706] <Warning>: [itrace]: [3edc9d98]: [SSDownloadManager _copyDownloads]
    Jan 21 11:12:58 unknown SpringBoard[5706] <Warning>: [itrace]: [3edc9d98]: [SSDownload cachedApplicationIdentifier]
    Jan 21 11:12:58 unknown SpringBoard[5706] <Warning>: [itrace]: [3edc9d98]: [SSDownload status]
    Jan 21 11:12:58 unknown SpringBoard[5706] <Warning>: [itrace]: [3edc9d98]: [SSDownload cachedApplicationIdentifier]
    Jan 21 11:12:58 unknown SpringBoard[5706] <Warning>: [itrace]: [3edc9d98]: [CPDistributedNotificationCenter postNotificationName:userInfo:]: SBApplicationNotificationStateChanged: {
          SBApplicationStateDisplayIDKey = "com.apple.AppStore";
          SBApplicationStateKey = 2;
          SBApplicationStateProcessIDKey = 5868;
          SBMostElevatedStateForProcessID = 2;
      }
    Jan 21 11:12:58 unknown SpringBoard[5706] <Warning>: [itrace]: [3edc9d98]: [CPDistributedNotificationCenter postNotificationName:userInfo:toBundleIdentifier:]: SBApplicationNotificationStateChanged: {
          SBApplicationStateDisplayIDKey = "com.apple.AppStore";
          SBApplicationStateKey = 2;
          SBApplicationStateProcessIDKey = 5868;
          SBMostElevatedStateForProcessID = 2;
      }: null
    Jan 21 11:12:59 unknown SpringBoard[5706] <Warning>: [itrace]: [105d7000]: [SSDownloadManager _handleMessage:fromServerConnection:]: 0xe6920b0: 0xe007040
    Jan 21 11:12:59 unknown SpringBoard[5706] <Warning>: [itrace]: [105d7000]: [SSDownloadManager _handleDownloadStatesChanged:]: 0xe6920b0
    Jan 21 11:12:59 unknown SpringBoard[5706] <Warning>: [itrace]: [105d7000]: [SSDownloadManager _copyDownloads]
    Jan 21 11:12:59 unknown SpringBoard[5706] <Warning>: [itrace]: [105d7000]: [SSDownload persistentIdentifier]
    Jan 21 11:12:59 unknown SpringBoard[5706] <Warning>: [itrace]: [105d7000]: [SSDownload _addCachedPropertyValues:]: {
          I = SSDownloadPhaseDownloading;
      }
    Jan 21 11:12:59 unknown SpringBoard[5706] <Warning>: [itrace]: [105d7000]: [SSDownload _applyPhase:toStatus:]: SSDownloadPhaseDownloading: <SSDownloadStatus: 0xe6b8e80>
    Jan 21 11:12:59 unknown SpringBoard[5706] <Warning>: [itrace]: [105d7000]: [SSDownloadQueue downloadManager:downloadStatesDidChange:]: <SSDownloadManager: 0x41ea60>: (
          "<SSDownload: 0xe6bd970>: -4085275246093726486"
      )
    

####如何编译

  1. 编译ios版本:
xmake f -p iphoneos
xmake 
xmake f -p iphoneos -a arm64
xmake 
  1. 编译macosx版本:
xmake f -p macosx
xmake 

更详细的xmake使用,请参考:xmake文档

依赖库介绍:tbox

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itrace's Issues

64位注入相关

测试了一波,64位注入除了要把itrace.xml和dylib放到对应位置,还需要在app的document文件夹下也放一个itrace.xml?否则一开始init就歇逼了。我是直接复制了一份过去,就可以跑起来了。

不知道这个操作对不对?

os x注入问题

我在mac上想动态跟踪一些函数,按照第4条找了macSubstrate,但是它的插件只支持.bundle或者.framework,我用ldid -s并没有生成这样的文件。请问该怎么进行下去?

64位 打印frame崩溃

Describe the bug

64位 打印frame崩溃
大佬能修复支持下吗

Error output

Terminating app due to uncaught exception 'CALayerInvalidGeometry', reason: 'CALayer position contains NaN: [nan 3.97496e-275]'

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