How to: Use Native Run-Time Checks
In a Visual Studio C++ project, 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_checkspragma 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 Managing Exceptions with the Debugger.
The following procedures describe how to enable native run-time checks in a debug build, and how to modify native run-time check behavior.
Other topics in this section provide information about:
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