在iOS私有代码中调试iOS信号异常

发布于 2025-01-06 21:28:44 字数 780 浏览 4 评论 0原文

我知道一个相当不错的标题。

然而我似乎不断收到这些神秘的错误& GDB 向我显示的只是 Apple 代码的行号，这些代码已经消失了。即

0x028235bd  <+0025>  jne    0x28235dd <_ZN2CA5Layer15collect_layers_EPNS0_17CollectLayersDataE+57>
0x028235bf  <+0027>  mov    0x4(%eax),%ecx
0x028235c2  <+0030>  test   %ecx,%ecx
0x028235c4  <+0032>  js     0x28235dd <_ZN2CA5Layer15collect_layers_EPNS0_17CollectLayersDataE+57>
0x028235c6  <+0034>  mov    0x8(%ebp),%edx
0x028235c9  <+0037>  mov    0x78(%edx,%ecx,4),%edx          <---- EXC_BAD_ACCESS

我只想迭代一下，我知道上面的内容表明已释放的对象正在被再次访问。然而问题是，当我没有堆栈跟踪甚至寄存器值时，如何调试它？

它不仅是 EXC_BAD_ACCESS，还有 SIGABRT 错误，否则我可以使用 NSZombieEnabled 技巧。

（进一步说明，此调用跟踪与 ViewController 等相关，因此任何调试这些的指针也会很有帮助）

再次感谢。

原文

I know quite a title.

However I seem to keep getting these mysterious errors & all GDB shows me is the line number of Apples code thats gone bang. I.e.

0x028235bd  <+0025>  jne    0x28235dd <_ZN2CA5Layer15collect_layers_EPNS0_17CollectLayersDataE+57>
0x028235bf  <+0027>  mov    0x4(%eax),%ecx
0x028235c2  <+0030>  test   %ecx,%ecx
0x028235c4  <+0032>  js     0x28235dd <_ZN2CA5Layer15collect_layers_EPNS0_17CollectLayersDataE+57>
0x028235c6  <+0034>  mov    0x8(%ebp),%edx
0x028235c9  <+0037>  mov    0x78(%edx,%ecx,4),%edx          <---- EXC_BAD_ACCESS

I just want to iterate that the above I know indicates that a released object is being accessed again. However the issue is how do I debug this when I don't have a stacktrace or even the register values?

Its not just EXC_BAD_ACCESS but also SIGABRT errors otherwise I could use the NSZombieEnabled trick.

(As a further note, this call trace is related to ViewControllers and the like, so any pointers debugging these would be helpful too)

Thanks again.

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