Visual C++ Vers 2.0 README.WRI, Part 5 C++ Exception Handling (120921)


The information in this article applies to:

  • Microsoft Visual C++ 2.0, when used with:
    • the hardware: Intel x86
This article was previously published under Q120921

SUMMARY

The following is based on the Visual C++ version 2.0 README.WRI file:

Interaction Between setjmp/longjmp and C++ Exception Handling

The use of setjmp and longjmp is strongly discouraged in C++ programs. However, if you use these functions and compile with the /GX option (Enable Exception Handling), destructors for local objects will be called during the stack unwind. Note that the use of setjmp and longjmp in C++ programs may degrade performance by preventing optimization on local variables.

This interaction between setjmp/longjmp and C++ exception handling is supported only when you include SETJMP.H or SETJMPEX.H.

If you are writing code that is intended to be portable, do not rely on correct destruction of frame-based objects when executing a non-local goto using a call to longjmp. The use of C++ exception handling try/catch constructs is recommended in C++ programs instead of setjmp and longjmp.
Modification Type:MajorLast Reviewed:10/17/2003
Keywords:KB120921
©2003 Microsoft Corporation. All rights reserved.