Stack Overflow Error in native Cobol

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over 8 years ago

Problem:

During runtime you get Stack Overflow errors when Cobol DLLs are called. As the levels of inheritance grow up to a specific level everything runs fine, but when you move a step down in the inheritance level you get a stack overflow error.

Solution:

The usual cause of this kind of exception is that there is not enough stack space, and this is one of those cases. 

The default stack size for a Windows executable is only 1Mb. To increase the stack size there are a couple of options here ...

1) Build the top-level code to an exe, and include a larger stack size

e.g. set link=/stack:2000000
cbllink cobclient.cbl

2) Use editbin (in a VS command prompt) on the MF run trigger, to increase its stack size

e.g. editbin /stack:2000000 run.exe

The issue will not appear with INT code since in that case local storage is dynamically allocated from the Windows heap rather than from the system stack.

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