了解对象在gc堆中的布局是很有用的。在垃圾收集期间，有效的对象是通过递归访问对象来标记的，这些对象从堆栈的根和句柄开始。但是，从每个堆段的开始到结束，对象的位置以一种有组织的方式排列也很重要。！DumpHeap命令依赖于这个逻辑组织来正确地遍历堆，如果它报告了一个错误，可以打赌您的堆出了问题。

下面是代码

usingSystem;usingSystem.Reflection;usingSystem.Reflection.Emit;usingSystem.Threading;usingSystem.Runtime.InteropServices;public classEmitHelloWorld

{



      [DllImport("kernel32")]public static extern voidDebugBreak();static void Main(string[] args)

      {//create a dynamic assembly and module
            AssemblyName assemblyName = newAssemblyName();

            assemblyName.Name= "HelloWorld";

            AssemblyBuilder assemblyBuilder=Thread.GetDomain().DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.RunAndSave);

            ModuleBuilder module;

            module= assemblyBuilder.DefineDynamicModule("HelloWorld.exe");//create a new type to hold our Main method
            TypeBuilder typeBuilder = module.DefineType("HelloWorldType", TypeAttributes.Public |TypeAttributes.Class);//create the Main(string[] args) method
            MethodBuilder methodbuilder = typeBuilder.DefineMethod("Main", MethodAttributes.HideBySig | MethodAttributes.Static | MethodAttributes.Public, typeof(void), new Type[] { typeof(string[]) });//generate the IL for the Main method
            ILGenerator ilGenerator =methodbuilder.GetILGenerator();

            ilGenerator.EmitWriteLine("hello, world");

            ilGenerator.Emit(OpCodes.Ret);//bake it
            Type helloWorldType =typeBuilder.CreateType();//run it
            helloWorldType.GetMethod("Main").Invoke(null, new string[] {null});



DebugBreak();//set the entry point for the application and save it
assemblyBuilder.SetEntryPoint(methodbuilder, PEFileKinds.ConsoleApplication);

            assemblyBuilder.Save("HelloWorld.exe");

      }

}

标签: none

添加新评论