c# 如何让应用程序崩溃时生成dump

news/2025/1/15 15:23:54/

在代码中手动生成Dump文件

研究了一下，可以通过代码在应用崩溃或捕获特定异常时，手动生成dump文件。常用的是调用Windows的MiniDumpWriteDump API。可以使用P/Invoke调用该函数，具体步骤如下：

导入必要的Windows API：

using System;
using System.Diagnostics;
using System.IO;
using System.Runtime.InteropServices;class MiniDump
{[Flags]public enum MiniDumpType{MiniDumpNormal = 0x00000000,MiniDumpWithDataSegs = 0x00000001,MiniDumpWithFullMemory = 0x00000002,MiniDumpWithHandleData = 0x00000004,MiniDumpFilterMemory = 0x00000008,MiniDumpScanMemory = 0x00000010,MiniDumpWithUnloadedModules = 0x00000020,MiniDumpWithIndirectlyReferencedMemory = 0x00000040,MiniDumpFilterModulePaths = 0x00000080,MiniDumpWithProcessThreadData = 0x00000100,MiniDumpWithPrivateReadWriteMemory = 0x00000200,MiniDumpWithoutOptionalData = 0x00000400,MiniDumpWithFullMemoryInfo = 0x00000800,MiniDumpWithThreadInfo = 0x00001000,MiniDumpWithCodeSegs = 0x00002000,MiniDumpWithoutAuxiliaryState = 0x00004000,MiniDumpWithFullAuxiliaryState = 0x00008000,MiniDumpWithPrivateWriteCopyMemory = 0x00010000,MiniDumpIgnoreInaccessibleMemory = 0x00020000,MiniDumpWithTokenInformation = 0x00040000}[DllImport("dbghelp.dll", SetLastError = true)]static extern bool MiniDumpWriteDump(IntPtr hProcess,int processId,IntPtr hFile,MiniDumpType dumpType,IntPtr exceptionParam,IntPtr userStreamParam,IntPtr callbackParam);public static void WriteDump(string dumpFilePath){using (var fs = new FileStream(dumpFilePath, FileMode.Create, FileAccess.Write, FileShare.None)){Process process = Process.GetCurrentProcess();bool success = MiniDumpWriteDump(process.Handle,process.Id,fs.SafeFileHandle.DangerousGetHandle(),MiniDumpType.MiniDumpWithFullMemory,IntPtr.Zero,IntPtr.Zero,IntPtr.Zero);if (!success){throw new System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error());}}}
}

调用生成dump文件：在你的程序中可以在捕获异常时调用这个方法：

try
{// 代码可能抛出异常
}
catch (Exception ex)
{// 发生异常时生成dumpMiniDump.WriteDump("C:\\Dumps\\crashdump.dmp");throw; // 可以选择继续抛出异常或处理异常
}

还可以捕获未处理的异常，生成dump

AppDomain.CurrentDomain.UnhandledException += (sender, args) =>
{Exception e = (Exception)args.ExceptionObject;MiniDump.WriteDump("C:\\Dumps\\unhandled_exception.dmp");
};

这样，当未捕获的异常导致应用崩溃时，dump文件就会自动生成。