after app installed, xcode stop running the app.

[iOSleep]

安装app后可以直接在手机打开app, 弹出默认添加的alert, reveal的framework也可以这场使用.
但是xcode里的应用已经退出了, 不像demo中的youtube, 还可以运行.
after app installed, xcode stop running the app, but i can run the app in my phone with method in IPAPatchEntry available.

xcode: 8.2.1
osx: 10.12.3
iOS: 10.2.1
app: https://pan.baidu.com/s/1jH8jJwU password: s43i

[Naituw]

This app is using some anti-debugger technique, prevents lldb to attach.

I just disabled it with b2efc00

Please pull and try again :)

[wang9262]

After your fixing, Xcode becomes frozen when launches the app, and the app keeps showing the launch screen. It works very well when I head to the commit before b2efc00.

Any ideas about this?

Tested on iPhone 6 iOS 10.2 WeChat 6.5.5

[wang9262]

FYI.
When I comment the disable_sysctl_debugger_checking() line in IPAPatchBypassAntiDebugging.m, It works again.

+ (void)load
{
    disable_pt_deny_attach();
//    disable_sysctl_debugger_checking();

#if TESTS_BYPASS
    test_aniti_debugger();
#endif
}

[Naituw]

@wang9262 Thank you for reporting this! I corrected the implementation with ccb2b4d, and it seems work as expected now. please pull and try again

[wang9262]

uhh...It keeps freezing in my situation after pulling the newest master.And commenting the line metioned above,It works again.Do you need more info? If so,I will push my repo to reproduce this freezing case.

[Naituw]

@wang9262 Sorry for delayed reply. Would you push your repo please? I can't reproduce this issue since ccb2b4d

[wang9262]

Because some network problems, the .ipa file and .framework upload so SLOWLY.I will upload them to some net disk Tonight.Sorry for delaying 😂.

Here is the repo IPAPatch-WeChat.I comment the line metioned above and you can uncomment it to reproduce the issue.

[Naituw]

Thanks! I will try it later

Update
@wang9262 I do reproduce this issue, but I didn't find the reason yet, I will do some experiment about it. I will let you know if I find something.
At this moment you can just comment that line when using IPAPatch with Wechat.

[Naituw]

@wang9262 I pushed another commit to fix this issue (6589581), it is a temporary workaround, may not reliable. Would you try this again please?

[wang9262]

@Naituw Great! It makes sense.Could you tell me more details about why this issue happen?

[Naituw]

@wang9262 This issue is very weird, I didn't really find the actual reason, just worked-around it. I find WeChat will call sysctl twice during launch:

• first call's (*arg2).kp_proc.p_flag is a value contains P_TRACED
• second call does not

If I didn't change the result of first call, WeChat will launch without problem, so I just bypass the first call by checking the input value of (*arg2).kp_proc.p_flag.

Since the actual reason haven't been discovered, I will open another issue to track this (#21).