Memory debug library functions

This appendix contains reference information about the XL C compiler memory debug library functions, which are extensions of the standard C memory management functions. The appendix is divided into two sections:

• Memory allocation debug functions describes the debug versions of the standard library functions for allocating heap memory.
• String handling debug functions describes the debug versions of the standard library functions for manipulating strings.

To use these debug versions, you can do either of the following operations:

• In your source code, prefix any of the default or user-defined-heap memory management functions with _debug_.
• If you do not want to make changes to the source code, compile with the -qheapdebug option. This option maps all calls to memory management functions to their debug version counterparts. To prevent a call from being mapped, parenthesize the function name.