How to: Use Native Run-Time Checks
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In Visual C++, you can use native runtime_checks to catch common run-time errors such as:
Stack pointer corruption.
Overruns of local arrays.
Dependencies on uninitialized local variables.
Loss of data on an assignment to a shorter variable.
If you use /RTC with an optimized (/O) build, a compiler error results. If you use a runtime_checks pragma in an optimized build, the pragma has no effect.
When you debug a program that has run-time checks enabled, the default action is for the program to stop and break to the debugger when a run-time error occurs. You can change this default behavior for any run-time check. For more information, see Exception Handling (Debugging).
The following procedures describe how to enable native run-time checks in a debug build, and how to modify native run-time check behavior.
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To enable native run-time checks in a debug build
Use the /RTC option and link with the debug version of a C run-time library (/MDd, for example).
To modify native run-time check behavior
Use the runtime_checks pragma.