Visual Studio Debugger观察问题 [英] Visual Studio Debugger Watch problems

问题描述

如何在Visual Studio调试器监视窗口（或其他地方）中找到堆栈上的变量地址

读取变量的工作正常：

/ p>

  streets streets [11790]（0x1c66a690 [...] std :: vector< Street *，std :: allocator< >>>> 
  

但是在前面加上&不能给我一个地址：

 & streets streets [11790]（0x1c66a690 [...] std :: vector< Street *，std :: allocator< Street * ;> 
  

此外，尝试读取大小不起作用， p>

  streets.size（）CXX0075：错误：无法设置函数评估
  
解决方案
程序是以调试模式编译的。 Studio Debugger通过 autoexp.dat 文件中的模式定义的转换来驱动调试器监视，快速观察，自动和局部变量视图（取决于您的VS版本，其中的内容可能会显着不同） 。该文件位于您的VS-InstallDir / Common7 / Packages / Debugger文件夹（至少它是VS2010和VS2012）。 
 
 
 
知道这一点，您可以尝试/考虑几个想法：
 
 
 
 方法一：库知识 
 
 
 
要访问向量I中的第一个元素的实际地址最终只需这样做：
  streets._Myfirst 
  
如果您知道要查看的元素数量，可以使用数组扩展扩展：
  streets._Myfirst，N 
  
其中 N 是元素的数量
 
 
 
注意：这只适用于上面的向量。实践根据您使用的容器而有所不同。有没有怀疑更简单的方法可能较少依赖于std :: vector<>的实现，但这是最简单的，我知道如何让你快速调试和调试。
 
 
 
 
 
 
 方法二：烧焦的地球 
 
 
 
 General是一个可以打开和关闭的功能列表。其中一个你会发现这个问题特别有用：
 
 
在变量窗口中显示对象的原始结构。
 
 
打开 ON 可查看所有结构和容器的原始成员变量，包括标准容器，如std： ：vector>。这会有效地禁止在 autoexp.dat  
 
中使用模板
How can I find out the address of a variable on the stack in the visual studio debugger watch window (or elsewhere?)

Reading the variable works fine:
streets     streets [11790](0x1c66a690 [...] std::vector<Street *,std::allocator<Street *> >
But prefixing with & doesn't give me an address:
&streets        streets [11790](0x1c66a690 [...] std::vector<Street *,std::allocator<Street *> >
Also, trying to read the size doesn't work, why is that?
streets.size()  CXX0075: Error: Cannot set up Function Evaluation   
The program is compiled in debug mode.
解决方案
The Visual Studio Debugger drives debugger watch, quick-watch, auto, and local variable views through a translation defined by schema in a file called autoexp.dat (depending on your VS version, the content therein can vary markedly). The file is located in your VS-InstallDir/Common7/Packages/Debugger folder (at least it is for VS2010 and VS2012). 

Knowing this, a couple of ideas for you to try/consider:

Method One: Library Know-How

To access the actual address of the first element within the vector I ultimately just do this:
streets._Myfirst
if you know the number of elements you're going to view, you can use the array-expansion extension by:
streets._Myfirst,N
where N is the number of elements

Note: this only works as shown above with vectors. The practice is different depending on which container you are using. There are no-doubt simpler ways that are probably less dependent on the implementation of std::vector<>, but this is the simplest wasy I know how to get you up and debugging quickly.



Method Two: Scorched Earth

Under Tools/Options/Debugging/General is a list of features you can switch on and off. One of them you will find particularly useful to this question:

  
Show raw structure of objects in variable windows.
Turn this ON to see raw member variables of all structures and containers, including standard containers like std::vector<>. This effectively disables usage of the templates in autoexp.dat

                        
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