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如何调试 MobileSubstrate 调整？

发布于 2024-11-25 09:55:04 字数 72 浏览 10 评论 0原文

调试 MobileSubstrate 扩展的最佳方法是什么，即放置断点等？有办法在 Xcode 中做到这一点吗？ GNU 调试器？

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嗳卜坏 2024-12-02 09:55:04

我使用系统日志和尾部。您需要 Cydia 的 syslogd 和 Erica Utilities。然后在整个调整过程中放置 NSLog(@"breakpoint 1 - %@", someObject); 并运行调整。

tail -f /var/log/syslog

I use the syslog and tail. You'll need syslogd and Erica Utilities from Cydia. Then throughout your tweak place NSLog(@"breakpoint 1 - %@", someObject); and run the tweak.

tail -f /var/log/syslog

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定格我的天空 2024-12-02 09:55:04

#define Debugger() { kill( getpid(), SIGINT ) ; }

然后，您只需在要放置断点的位置调用 Debugger() 即可。

如果你想跟踪堆栈，你也可以引发异常：

[NSException raise:@"Exception Message" format:formatString];

#define Debugger() { kill( getpid(), SIGINT ) ; }

Then you just call Debugger() wherever you want to place a breakpoint.

You can also raise an exception if you want to trace the stack:

[NSException raise:@"Exception Message" format:formatString];

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无力看清 2024-12-02 09:55:04

Mobilesubstrate 将您的 dylib 注入目标进程。使用 GDB 或 LLDB 调试目标进程也是在调试扩展代码。
我将向您展示如何使用 GDB 调试 Mobilesubstrate 扩展。
这是简单的 Mobilesubstrate/Logos 扩展：

%hook SBApplicationController
-(void)uninstallApplication:(id)application {
    int i = 5;
    i = i +7;
    NSLog(@"Hey, we're hooking uninstallApplication: and number: %d", i);
    %orig; // Call the original implementation of this method
    return;
}
%end

我编译并安装代码，然后将 gdb 附加到它：

yaron-shanis-iPhone:~ root# ps aux | grep -i springboard
mobile     396   1.6  4.3   423920  21988   ??  Ss    2:19AM   0:05.23 /System/Library/CoreServices/SpringBoard.app/SpringBoard
root       488   0.0  0.1   273024    364 s000  S+    2:22AM   0:00.01 grep -i springboard
yaron-shanis-iPhone:~ root# gdb -p 488

您可以使用以下命令找到您的 Mobilesubstrate 扩展：

(gdb) info sharedlibrary

此命令打印已加载模块的列表，找到您的扩展：

test-debug-substrate.dylib            - 0x172c000         dyld Y Y /Library/MobileSubstrate/DynamicLibraries/test-debug-substrate.dylib at 0x172c000 (offset 0x172c000)

您还可以找到Logos uninstallApplication 钩子的地址：

(gdb) info functions uninstallApplication

输出如下：

0x0172cef0  _logos_method$_ungrouped$SBApplicationController$uninstallApplication$(SBApplicationController*, objc_selector*, objc_object*)

您可以使用断点和其他 gdb 功能调试 uninstallApplication 钩子函数：

(gdb) b *0x0172cef0+36

其中偏移量 36 是在 uninstallApplication 钩子函数中将 7 添加到 i 变量的汇编操作码。您可以根据需要继续从此处调试您的 Mobilesubstrate 扩展。

Mobilesubstrate injects your dylib into the target process. Debugging the target process using GDB or LLDB is also debugging your extension code.
I will show you how to debug Mobilesubstrate extension using GDB.
Here is simple Mobilesubstrate/Logos extension:

%hook SBApplicationController
-(void)uninstallApplication:(id)application {
    int i = 5;
    i = i +7;
    NSLog(@"Hey, we're hooking uninstallApplication: and number: %d", i);
    %orig; // Call the original implementation of this method
    return;
}
%end

I compile and install the code, and then attaching gdb to it:

yaron-shanis-iPhone:~ root# ps aux | grep -i springboard
mobile     396   1.6  4.3   423920  21988   ??  Ss    2:19AM   0:05.23 /System/Library/CoreServices/SpringBoard.app/SpringBoard
root       488   0.0  0.1   273024    364 s000  S+    2:22AM   0:00.01 grep -i springboard
yaron-shanis-iPhone:~ root# gdb -p 488

You can find your Mobilesubstrate extension with the command:

(gdb) info sharedlibrary

This command print a list of loaded modules, find your extension:

test-debug-substrate.dylib            - 0x172c000         dyld Y Y /Library/MobileSubstrate/DynamicLibraries/test-debug-substrate.dylib at 0x172c000 (offset 0x172c000)

You can also find the address of Logos uninstallApplication hook:

(gdb) info functions uninstallApplication

Which outputs this:

0x0172cef0  _logos_method$_ungrouped$SBApplicationController$uninstallApplication$(SBApplicationController*, objc_selector*, objc_object*)

You can debug your uninstallApplication hook function with breakpoints and other gdb features:

(gdb) b *0x0172cef0+36

Where the offset 36 is the assembly opcode that adding of 7 to the i variable in uninstallApplication hook function. You can continue to debug your Mobilesubstrate extension from here as you wish.

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