BUG: CVW 3.x and FORTRAN DLLs: Stack Trace Hangs Machine

 Last reviewed: February 16, 1996
Article ID: Q85164
The information in this article applies to:
  • Microsoft FORTRAN for MS-DOS, version 5.1
  • Microsoft FORTRAN for OS/2, version 5.1

SYMPTOMS

Using Microsoft Codeview for Windows versions 3.x under Windows 3.1 to debug Microsoft FORTRAN 5.1 Windows DLLs that have been called by C applications can hang the machine if the CALL menu is selected or the stack trace command, K, is entered in the command window.

CAUSE

There is a problem in the CodeView for Windows FORTRAN expression evaluator that is incorrectly accessing the stack.

RESOLUTION

If a stack trace is desired, enter the command 

   use c
in the command window. This will cause CVW to use the C expression evaluator. To return using the FORTRAN expression evaluator type 

   use fortran
in the command window.

STATUS

Microsoft has confirmed this to be a problem in FORTRAN version 5.1.

This is not an issue in FORTRAN PowerStation.

MORE INFORMATION

To duplicate this problem, build the MULMIX_D project that is provided in the FORTRAN 5.1 samples subdirectory. There is a makefile that is provided called MULMIX_D.MAK. The makefile assumes that C 6.0 will be used. Using C/C++ 7.0 to build the application and DLL avoids the problem because there is no FORTRAN expression evaluator for the 4.0 versions of CV or CVW which are provided with C/C++ 7.0.

Additional reference words: 5.10
KBCategory: kbtool kbbuglist
KBSubCategory: CvwIss

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Last reviewed: February 16, 1996
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