在非托管代码中相当于System.Diagnostics.Debugger.Launch（）是什么？ [英] What is the equivalent of System.Diagnostics.Debugger.Launch() in unmanaged code?

问题描述

当满足某些条件时，我需要从本机C ++程序启动调试器。在C＃中，我刚刚调用System.Diagnostics.Debugger.Launch（）。我以为Win32 DebugBreak（）调用会做我想要的，但是如果没有调试器，它就会终止应用程序。

I need to launch a debugger from my native C++ program when certain conditions are met. In C# I just call System.Diagnostics.Debugger.Launch(). I thought that Win32 DebugBreak() call will do what I want, but it just terminates the application if there is no debugger present.

如何启动一个新的实例调试器（着名的可能的调试器对话框）从本机代码？甚至有可能吗我可以尝试使用COM创建一个新的Visual Studio实例，但它有点复杂，并且也将锁定到一个特定版本的VS。

How do I launch a new instance of the debugger (the famous "Possible debuggers" dialog) from native code? Is it even possible? I could try to use COM to create a new instance of Visual Studio, but it is kinda complicated, and will also lock me to a particular version of VS.

推荐答案

我发现可以使用当前进程的PID直接调用vsjitdebugger.exe。确保在Visual Studio中的Tools-> Options-> Debugging-> Just-in-Time中选择了Native。

I turns out that it is possible to call vsjitdebugger.exe directly with the PID of the current process. Make sure that "Native" is selected in Tools->Options->Debugging->Just-in-Time in Visual Studio.

这里是启动调试器的C ++代码。它使用UNICODE版本的各种Win32 API。我得到系统目录，因为CreateProcess（）不使用PATH。

Here's C++ code to launch debugger. It uses UNICODE versions of various Win32 APIs. I get System directory, because CreateProcess() does not use PATH.

bool launchDebugger()
{
    // Get System directory, typically c:\windows\system32
    std::wstring systemDir(MAX_PATH+1, '\0');
    UINT nChars = GetSystemDirectoryW(&systemDir[0], systemDir.length());
    if (nChars == 0) return false; // failed to get system directory
    systemDir.resize(nChars);

    // Get process ID and create the command line
    DWORD pid = GetCurrentProcessId();
    std::wostringstream s;
    s << systemDir << L"\\vsjitdebugger.exe -p " << pid;
    std::wstring cmdLine = s.str();

    // Start debugger process
    STARTUPINFOW si;
    ZeroMemory(&si, sizeof(si));
    si.cb = sizeof(si);

    PROCESS_INFORMATION pi;
    ZeroMemory(&pi, sizeof(pi));

    if (!CreateProcessW(NULL, &cmdLine[0], NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi)) return false;

    // Close debugger process handles to eliminate resource leak
    CloseHandle(pi.hThread);
    CloseHandle(pi.hProcess);

    // Wait for the debugger to attach
    while (!IsDebuggerPresent()) Sleep(100);

    // Stop execution so the debugger can take over
    DebugBreak();
    return true;
}

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