静态对象被固定并且不能被GC重新分配？

发布于 2024-12-12 05:41:41 字数 1459 浏览 0 评论 0原文

我的类中有一个静态变量，当我通过 Windbg/sos 查看该对象时，它显示该对象已固定。我认为这意味着 GC 无法在其他地方分配该对象。知道为什么静态变量被视为固定变量吗？

这是我的类中该变量的声明

namespace ConsoleApplication1
{  
    class Program  
    {  
        static string Name = "Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";  
    }  
}

，这是 Windbg 的输出形式

0:004> !do 0231bb70   
Name:        System.String  
MethodTable: 6c97f92c  
EEClass:     6c6b8ba0  
Size:        418(0x1a2) bytes  
File:        C:\Windows\Microsoft.Net\assembly\GAC_32\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll  
String:        Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa    
Fields:    
      MT    Field   Offset                 Type VT     Attr    Value Name  
6c9828f8  4000103        4         System.Int32  1 instance      202 m_stringLength  
6c981d48  4000104        8          System.Char  1 instance       41 m_firstChar  
6c97f92c  4000105        8        System.String  0   shared   static Empty  
    >> Domain:Value  004f6588:02311228 <<  
0:004> !gcroot 0231bb70   
Scan Thread 0 OSTHread 2824  
Scan Thread 2 OSTHread 1ae0  
DOMAIN(004F6588):HANDLE(Pinned):1613f4:Root:  03312020(System.Object[])->
  0231bb70(System.String)  
DOMAIN(004F6588):HANDLE(Pinned):1613fc:Root:  03311010(System.Object[])->
  0231bb70(System.String)

。在 !gcroot 的输出中，它显示为 HANDLE(PINNED)。我误读了这个输出吗？

原文

I have a static variable in my class, when I look at this object via windbg/sos, it shows this object as Pinned. I assume that this mean GC cannot allocate this object anywhere else. Any ideas why static variables are treated as pinned?

Here is the declaration of this variable in my class

namespace ConsoleApplication1
{  
    class Program  
    {  
        static string Name = "Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";  
    }  
}

and here is the output form windbg

0:004> !do 0231bb70   
Name:        System.String  
MethodTable: 6c97f92c  
EEClass:     6c6b8ba0  
Size:        418(0x1a2) bytes  
File:        C:\Windows\Microsoft.Net\assembly\GAC_32\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll  
String:        Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa    
Fields:    
      MT    Field   Offset                 Type VT     Attr    Value Name  
6c9828f8  4000103        4         System.Int32  1 instance      202 m_stringLength  
6c981d48  4000104        8          System.Char  1 instance       41 m_firstChar  
6c97f92c  4000105        8        System.String  0   shared   static Empty  
    >> Domain:Value  004f6588:02311228 <<  
0:004> !gcroot 0231bb70   
Scan Thread 0 OSTHread 2824  
Scan Thread 2 OSTHread 1ae0  
DOMAIN(004F6588):HANDLE(Pinned):1613f4:Root:  03312020(System.Object[])->
  0231bb70(System.String)  
DOMAIN(004F6588):HANDLE(Pinned):1613fc:Root:  03311010(System.Object[])->
  0231bb70(System.String)

See in the output of !gcroot this is displayed as HANDLE(PINNED). Am I misreading this output?

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