如何在Xcode中的_WebThreadLockFromAnyThread上设置符号断点？ [英] How do I set a symbolic breakpoint on _WebThreadLockFromAnyThread in Xcode?

问题描述

我正在使用Xcode 4.3.2和lldb作为我的调试器。

I'm using Xcode 4.3.2 with lldb as my debugger.

我继承了一个包含从辅助线程调用UIKit的代码的项目，如图所示通过这些日志信息：

I have inherited a project that contains code that is calling UIKit from secondary threads, as shown by these log messages:

2012-05-02 21：48：14.603 APPNAME开发[77594：16e0f]空隙
_WebThreadLockFromAnyThread （bool），0x8d5f810：从主线程或Web线程以外的线程获取Web锁定。 UIKit
不应该从辅助线程调用。

2012-05-02 21:48:14.603 Appname Dev[77594:16e0f] void _WebThreadLockFromAnyThread(bool), 0x8d5f810: Obtaining the web lock from a thread other than the main thread or the web thread. UIKit should not be called from a secondary thread.

我已经清理了大部分进行UIKit调用的代码从辅助线程，但我仍然偶尔在日志中看到此消息。该应用程序没有崩溃，因此很难确定问题所在。

I have cleaned up most of the code that was making UIKit calls from secondary threads, but I am still occasionally seeing this message in the logs. The app is not crashing, so it's difficult to pinpoint where the problem lies.

我想在 _WebThreadLockFromAnyThread ，但是当我尝试使用以下方法设置符号断点时：

I'd like to set a breakpoint on _WebThreadLockFromAnyThread, but when I try to set a symbolic breakpoint using:

b _WebThreadLockFromAnyThread

调试器告诉我：

断点集创建--name '_WebThreadLockFromAnyThread' 断点
：12：名称= '_WebThreadLockFromAnyThread'，位置= 0
（待定）警告：无法解析断点任何实际
位置

breakpoint set --name '_WebThreadLockFromAnyThread' Breakpoint created: 12: name = '_WebThreadLockFromAnyThread', locations = 0 (pending) WARNING: Unable to resolve breakpoint to any actual locations.

我也尝试使用断点导航器中的UI创建符号断点，但我不确定要为模块输入什么。当我将模块留空时，会创建断点，但是当调试控制台中出现日志消息时它仍然没有断开。

I've also tried creating the symbolic breakpoint using the UI in the breakpoint navigator, but I'm not sure what to enter for the module. When I leave the module blank, the breakpoint is created but it's still not breaking when the log message appears in the debug console.

任何人都可以告诉我如何去做在 _WebThreadLockFromAnyThread 上添加断点，以及如何确定此符号的定义模块是什么？

Can anyone tell me how I can go about adding a breakpoint on _WebThreadLockFromAnyThread, and also how I would determine what the defining module is for this symbol?

推荐答案

请忽略下划线。 b WebThreadLockFromAnyThread在lldb和gdb中都适用于我。现在，这是Xcode 4.6，所以如果您坚持使用旧版本，我认为该版本可能存在4.6版本中没有的问题。

Just leave out the underscore. b WebThreadLockFromAnyThread works for me in both lldb and gdb. Now, this is Xcode 4.6, so if you're stuck on the older version I suppose it's possible that there's an issue in that version not present in 4.6.

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