我已经为Log4net创建了一个包装器（我可能会支持NLog;我还没有决定），并且我缩进了记录的消息结果，以便了解调用结构。例如：
2011-04-03 00:20:30,271 [CT] DEBUG - Merlinia.ProcessManager.CentralThread.ProcessAdminCommand - ProcStart - User Info Repository
2011-04-03 00:20:30,271 [CT] DEBUG - Merlinia.ProcessManager.CentralThread.StartOneProcess - User Info Repository
2011-04-03 00:20:30,411 [CT] DEBUG - Merlinia.ProcessManager.CentralThread.SetProcessStatus - Process = User Info Repository, status = ProcStarting
2011-04-03 00:20:30,411 [CT] DEBUG - Merlinia.ProcessManager.CentralThread.SendProcessStatusInfo
2011-04-03 00:20:30,411 [CT] DEBUG - Merlinia.CommonClasses.MhlAdminLayer.SendToAllAdministrators - ProcessTable
2011-04-03 00:20:30,411 [CT] DEBUG - Merlinia.CommonClasses.MReflection.CopyToBinary
2011-04-03 00:20:30,411 [CT] DEBUG - Merlinia.CommonClasses.MReflection.CopyToBinary - False
2011-04-03 00:20:30,411 [CT] DEBUG - Merlinia.CommonClasses.MhlBasicLayer.SendToAllConnections - 228 - True - False
2011-04-03 00:20:30,411 [CT] DEBUG - Merlinia.CommonClasses.MmlNonThreaded.SendObject - 228
2011-04-03 00:20:30,411 [CT] DEBUG - Merlinia.CommonClasses.MllTcpSocket.SendMessage - 228 - True
2011-04-03 00:20:32,174 [10] DEBUG - Merlinia.CommonClasses.MReflection.CreateFromBinary
2011-04-03 00:20:32,174 [10] DEBUG - Merlinia.CommonClasses.MReflection.CopyFromBinary - Bytes = 71
2011-04-03 00:20:32,174 [CT] DEBUG - Merlinia.ProcessManager.CentralThread.MessagingCallback - User Info Repository - ProcessInfoAndRequests
2011-04-03 00:20:32,174 [CT] DEBUG - Merlinia.ProcessManager.CentralThread.ProcessProcessInfoAndRequests - User Info Repository
我使用System.Diagnostics.StackTrace并计算StackFrames。
现在问题是：有没有更有效的方法呢？我只需要确定（相对）调用堆栈深度，即当前深度加上或减去上次调用日志包装器时的深度。 （注意，我实际上并没有使用StackFrame对象 - 否则我会得到方法名称。）
我希望有一些简单的高性能方式来查询调用堆栈深度或堆栈使用情况。
答案 0 :(得分：6)
只需使用StackTrace.FrameCount属性，并将其与之前记录的FrameCount进行比较。仅供参考，FrameCount可能是检索实际帧数的最快方法，因为它只会将内部m_iNumOfFrames字段返回给您。
答案 1 :(得分：4)
经过六年半的可靠服务后，我突然意识到我的许多程序在应用Microsoft的更新（包括对.Net Framework 4.5的更改）后于2017年末崩溃。这就是编写依赖于mscorlib.dll中内部未记录的数据结构的代码所能获得的。
这个版本的代码再次起作用，并且面对未来可能更新的mscorlib.dll，它的设计也会稍微强一些 - 它希望只是优雅地失败并且总是返回零。但是仍然无法保证将来对mscorlib.dll的更改导致此代码中的未来崩溃。
/// <summary>
/// This test program demonstrates a faster way of getting call stack depth by avoiding getting a
/// StackTrace object. But you can't get the calling method names this way.
///
/// See http://stackoverflow.com/questions/5999177/for-c-logging-how-to-obtain-call-stack-depth-with-minimal-overhead
/// and http://ayende.com/blog/3879/reducing-the-cost-of-getting-a-stack-trace
///
/// Update, late 2017, .Net mscorlib.dll has been changed for .Net 4.5. In the code below the two
/// possibilities are called "old .Net" and "new .Net". The two versions can be tested by setting
/// the target for this project to either .Net Framework 2.0 or .Net Framework 4.5.
/// </summary>
class TestProgram
{
static void Main()
{
OneTimeSetup();
int i = GetCallStackDepth(); // i = 10 on my test machine for old .Net, 12 for new .Net
int j = AddOneToNesting();
Console.WriteLine(j == i + 1 ? "Test succeeded!" : "Test failed!!!!!!!!");
Console.ReadKey();
}
private delegate object DGetStackFrameHelper();
private static DGetStackFrameHelper _getStackFrameHelper = null;
private static FieldInfo _frameCount = null;
private static void OneTimeSetup()
{
try
{
Type stackFrameHelperType =
typeof(object).Assembly.GetType("System.Diagnostics.StackFrameHelper");
// ReSharper disable once PossibleNullReferenceException
MethodInfo getStackFramesInternal =
Type.GetType("System.Diagnostics.StackTrace, mscorlib").GetMethod(
"GetStackFramesInternal", BindingFlags.Static | BindingFlags.NonPublic);
if (getStackFramesInternal == null)
return; // Unknown mscorlib implementation
DynamicMethod dynamicMethod = new DynamicMethod(
"GetStackFrameHelper", typeof(object), new Type[0], typeof(StackTrace), true);
ILGenerator generator = dynamicMethod.GetILGenerator();
generator.DeclareLocal(stackFrameHelperType);
bool newDotNet = false;
ConstructorInfo constructorInfo =
stackFrameHelperType.GetConstructor(new Type[] {typeof(bool), typeof(Thread)});
if (constructorInfo != null)
generator.Emit(OpCodes.Ldc_I4_0);
else
{
constructorInfo = stackFrameHelperType.GetConstructor(new Type[] {typeof(Thread)});
if (constructorInfo == null)
return; // Unknown mscorlib implementation
newDotNet = true;
}
generator.Emit(OpCodes.Ldnull);
generator.Emit(OpCodes.Newobj, constructorInfo);
generator.Emit(OpCodes.Stloc_0);
generator.Emit(OpCodes.Ldloc_0);
generator.Emit(OpCodes.Ldc_I4_0);
if (newDotNet)
generator.Emit(OpCodes.Ldc_I4_0); // Extra parameter
generator.Emit(OpCodes.Ldnull);
generator.Emit(OpCodes.Call, getStackFramesInternal);
generator.Emit(OpCodes.Ldloc_0);
generator.Emit(OpCodes.Ret);
_getStackFrameHelper =
(DGetStackFrameHelper) dynamicMethod.CreateDelegate(typeof(DGetStackFrameHelper));
_frameCount = stackFrameHelperType.GetField("iFrameCount",
BindingFlags.NonPublic | BindingFlags.Instance);
}
catch
{} // _frameCount remains null, indicating unknown mscorlib implementation
}
private static int GetCallStackDepth()
{
if (_frameCount == null)
return 0; // Unknown mscorlib implementation
return (int)_frameCount.GetValue(_getStackFrameHelper());
}
private static int AddOneToNesting()
{
return GetCallStackDepth();
}
}
答案 2 :(得分：2)
感谢Teoman Soygul，尤其感谢Oren Eini，他的博客Teoman提供了链接。
以下是一些“概念验证”代码，我认为这是我将要使用的解决方案 - 尽管我必须承认我没有进行任何时序测试。
class TestProgram
{
static void Main(string[] args)
{
OneTimeSetup();
int i = GetCallStackDepth(); // i = 10 on my test machine
i = AddOneToNesting(); // Now i = 11
}
private delegate object DGetStackFrameHelper();
private static DGetStackFrameHelper _getStackFrameHelper;
private static FieldInfo _frameCount;
private static void OneTimeSetup()
{
Type stackFrameHelperType =
typeof(object).Assembly.GetType("System.Diagnostics.StackFrameHelper");
MethodInfo getStackFramesInternal =
Type.GetType("System.Diagnostics.StackTrace, mscorlib").GetMethod(
"GetStackFramesInternal", BindingFlags.Static | BindingFlags.NonPublic);
DynamicMethod dynamicMethod = new DynamicMethod(
"GetStackFrameHelper", typeof(object), new Type[0], typeof(StackTrace), true);
ILGenerator generator = dynamicMethod.GetILGenerator();
generator.DeclareLocal(stackFrameHelperType);
generator.Emit(OpCodes.Ldc_I4_0);
generator.Emit(OpCodes.Ldnull);
generator.Emit(OpCodes.Newobj,
stackFrameHelperType.GetConstructor(new Type[] { typeof(bool), typeof(Thread) }));
generator.Emit(OpCodes.Stloc_0);
generator.Emit(OpCodes.Ldloc_0);
generator.Emit(OpCodes.Ldc_I4_0);
generator.Emit(OpCodes.Ldnull);
generator.Emit(OpCodes.Call, getStackFramesInternal);
generator.Emit(OpCodes.Ldloc_0);
generator.Emit(OpCodes.Ret);
_getStackFrameHelper =
(DGetStackFrameHelper)dynamicMethod.CreateDelegate(typeof(DGetStackFrameHelper));
_frameCount = stackFrameHelperType.GetField(
"iFrameCount", BindingFlags.NonPublic | BindingFlags.Instance);
}
private static int GetCallStackDepth()
{
return (int)_frameCount.GetValue(_getStackFrameHelper());
}
private static int AddOneToNesting()
{
return GetCallStackDepth();
}
}
编辑：此版本在2017年末由Microsoft更新mscorlib.dll后不适用于.Net Framework 4.5。请参阅我发布的另一个更新版本的答案。 （我为了后代而离开了这个答案 - 它仍然适用于.Net Framework 2.0和3.5。）
答案 3 :(得分：0)
Environment.StackTrace.Split（Environment.NewLine）.Length
答案 4 :(得分：0)
如果您要递归到同一方法，并且只想知道当前方法的深度，则我正在使用这种检查，尽管这可能对性能不利。我猜new StackTrace()可以存储在某个地方以避免每次重新创建，但是对于我来说这并不重要，所以我这样使用它：
var callDepth = new StackTrace().GetFrames().Count(_ => _.GetMethod().Name == nameof(CallingMethod))
只需将CallingMethod替换为您的方法名称