FIX: CVW 4.0 Does Not Work with Dynamically Loaded DLL (87967)
The information in this article applies to:
- Microsoft CodeView for Windows 4.0
- Microsoft CodeView for Windows 4.01
This article was previously published under Q87967 SYMPTOMS
Microsoft CodeView for Windows (CVW) version 4.0 and 4.01 may not work with
a DLL that has been dynamically loaded, freed, and loaded again. Problems
include not stopping on existing breakpoints, not allowing new breakpoints,
watches displaying invalid or incorrect data, and mixed source/assembly
mode showing the wrong code.
CAUSE
CVW associates source lines and symbols with addresses when programs and
DLLs are loaded into memory. When Windows loads, frees, and loads a DLL
again, the DLL may be loaded into a new area of memory. CVW is not updating
the addresses of the symbols when this occurs.
RESOLUTION
If the DLL is loaded by another program before CVW is used, the DLL is not
loaded or freed by the program that is being debugged. Windows will not
load more than one copy of a DLL. It will just increase or decrease the
instance count of the DLL when the program is being debugged.
The solution to this problem is to create a stub program that loads the
DLLs that are being dynamically loaded. This program can be run before
running CVW.
STATUS
Microsoft has confirmed this to be a problem in Microsoft CodeView for
Windows versions 4.0 and 4.01. This problem was corrected in CodeView
version 4.1.
MORE INFORMATION
A dynamically loaded DLL is a DLL that is loaded using the
LoadLibrary() Windows API function.
| Modification Type: | Major | Last Reviewed: | 9/30/2003 |
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| Keywords: | kb16bitonly kbfix KB87967 |
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