c# - .net 是否在每次打开 try block 时注册一个新的异常处理程序？

Question

只是阅读第一次和第二次机会异常。并且在调试调试器时，调试器会在程序出现之前获得第一次机会异常。请记住，附加异常处理程序是如何工作的。是否每次打开 try block 时都会附加另一个异常处理程序？

Answer 1

这是我在 Junfeng Zhang's 中找到的精彩文章: "From Unhandled Exception to Debugger Attach"

这称为事后调试设置，您可以在 Windows 系统注册表中自行设置事后调试器，当 Visual Studio 安装注册表项时 \\HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\AeDebug 包含:

"C:\WINNT\system32\vsjitdebugger.exe"-p %ld -e %ld

因此 Visual Studio JIT 调试器被定义为默认的事后调试器。

只是关键点:(有关详细信息，请参阅文章)

Windows can handle user-mode errors in a variety of ways. The following sequence shows the precedence used for error handling:

1. If a user-mode debugger is currently attached to the faulting process, all errors will cause the target to break into this debugger.

2. If no user-mode debugger is attached and the executing code has its own exception handling routines (for example, try - except), this exception handling routine will attempt to deal with the error.

3. If no user-mode debugger is attached, and Windows has an open kernel-debugging connection, and the error is a breakpoint interrupt, Windows will attempt to contact the kernel debugger.