F10 does not step into the entry point of an executable with mainCRTStartup() or WinMainCRTStartup()

[zobermiller]

If I load an executable target into the debugger that has been built without the CRT main() or WinMain() entry points and instead was built with mainCRTStartup() or WinMainCRTStartup(), hitting F10 does not place me at the beginning of my entry point but instead somewhere inside ntdll.dll.

Here's a sample application:

#include <stdio.h>

int mainCRTStartup()
{
    int x = 5;
    int y = 10;

    printf("%d + %d = %d\n", x, y, x + y);
    return 0;
}

and build it with

cl /nologo /O2 /Zi /W3 /WX /GS- main.c /link /fixed /incremental:no /opt:icf /opt:ref /subsystem:console ucrt.lib

If I replace the mainCRTStartup() with main() and run the same command (excluding the ucrt.lib at the end), F10 will step directly into the beginning of main().

[ryanfleury]

WinMainCRTStartup should work, but the debugger was not previously looking for mainCRTStartup. Can you try pulling 25c31b0, building, and running again?

[zobermiller]

Yes, that worked perfectly. Thank you, Ryan! And I'm sorry about the wrong information regarding WinMainCRTStartup(). I must've been testing something else and misconstrued it as that instead.