Win64 gethostbyname() exception

Hot Topic

Question regarding removal of Windows driver service
CFrameWnd::OnSetPreviewMode ASSERTs in VC 2005 but not VC 6.0
Compiler's bug? It cleaned the parameter stack on a stdcall invoke.
Calling .NET DLL from VC++
Lininking as Single-Threaded in VC, Win32 Console
Checkbox problem
msvcr80.dll Problem
Error PRJ0002 : Error result 1 returned from 'C:\WINDOWS\system32\cmd.exe'
How do you develop an interface for an existing C++ program?
use of __value as a variable name in unmanaged c++ code

Visual C++

shortcut to access the scope and function droplist in the text editor
Command Line Arguments
File Open/Save As dialog box
Simple Simple COM
Call to Windows Sockets 2 API causing delay
Need help with overlapped I/O
rand() not being random!!!
msvcr80.dll Problem
Keyboard shortcuts?
Strange behavior of release executable

Win64 gethostbyname() exception

Under Win64 (amd64) I'm doing the following system call:

struct hostent *lpHost;

if ((lpHost = gethostbyname(szHost)) == NULL)

return false;

When doing so everything goes fine but in the VS2005 debug "output" window I see the following silent exception:

First-chance exception at 0x7d4e228c in mytest.exe: 0x000006C5: The tag is invalid.

I have verified that the code is correct and that everything works as it's suppose to. Therefore I do not understand this exception. It seems to be harmless since everything goes just fine but naturally I'd like to get it removed or find a reason for this happening.

Any ideas

Thanks in avance.

-- Henrik

Answer this question

Win64 gethostbyname() exception

clstephenson
Actually I should have been a little more specific:

The problem shows when running Win32 code under Win64 (through WOW64). I did not test Win32 code on Win32 or Win64 code on Win64.

I'm 100% sure there is nothing wrong with the code. It works on 6 other platforms including linux, mac osx and solaris.

I'll write a bug report and link it here.

-- Henrik
ewaldt

If you verified that everything from your side is correct then please log a bug at http://lab.msdn.microsoft.com/productfeedback/default.aspx

Thanks in advance for taking the time to log the issue!

Thanks,

Ayman Shoukry

VC++ Team
AmirZargham
Here is the link back to the bug report.

http://lab.msdn.microsoft.com/productfeedback/viewfeedback.aspx feedbackid=6ae85861-76af-44fd-a275-d64b0835bfcf
Win64 gethostbyname() exception

Answer this question