读取字符串实习池的内容 [英] Read the content of the string intern pool

问题描述

我想枚举字符串实习池中的字符串.

也就是说，我想得到string的所有实例s的列表，使得:

That is to say, I want to get the list of all the instances s of string such that:

string.IsInterned(s) != null

有没有人知道这是否可能?

Does anyone know if it's possible?

推荐答案

感谢@HansPassant 的建议，我设法获得了程序集中的字符串文字列表.这与我最初想要的非常接近.

您需要使用读取程序集元数据，并枚举用户字符串.这可以通过IMetaDataImport的这三个方法来完成:

You need to use read assembly meta-data, and enumerate user-strings. This can be done with these three methods of IMetaDataImport:

[ComImport, Guid("7DAC8207-D3AE-4C75-9B67-92801A497D44")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IMetaDataImport
{
    void CloseEnum(IntPtr hEnum);

    uint GetUserString(uint stk, [MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 1)] char[] szString, uint cchString, out uint pchString);

    uint EnumUserStrings(ref IntPtr phEnum, [MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 1)]uint[] rStrings, uint cmax, out uint pcStrings);

    // interface also contains 62 irrelevant methods
}

要获取IMetaDataImport的实例，需要获取一个IMetaDataDispenser:

To get the instance of IMetaDataImport, you need to get a IMetaDataDispenser:

[ComImport, Guid("809C652E-7396-11D2-9771-00A0C9B4D50C")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[CoClass(typeof(CorMetaDataDispenser))]
interface IMetaDataDispenser
{
    uint OpenScope([MarshalAs(UnmanagedType.LPWStr)]string szScope, uint dwOpenFlags, ref Guid riid, [MarshalAs(UnmanagedType.Interface)] out object ppIUnk);

    // interface also contains 2 irrelevant methods
}

[ComImport, Guid("E5CB7A31-7512-11D2-89CE-0080C792E5D8")]
class CorMetaDataDispenser
{
}

这是怎么回事:

var dispenser = new IMetaDataDispenser();
var metaDataImportGuid = new Guid("7DAC8207-D3AE-4C75-9B67-92801A497D44");

object scope;
var hr = dispenser.OpenScope(location, 0, ref metaDataImportGuid, out scope);

metaDataImport = (IMetaDataImport)scope;    

其中 location 是程序集文件的路径.

where location is the path to the assembly file.

之后，调用 EnumUserStrings() 和 GetUserString() 是直接的.

After that, calling EnumUserStrings() and GetUserString() is straighforward.

这是一篇包含更多细节的博文，以及GitHub 上的演示项目.

这篇关于读取字符串实习池的内容的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！