19.3 Additional Debugging Utilities

These routines provide additional features useful for tracking down memory leaks and dynamic memory corruption.

memdebug_mark:

Mark all currently allocated blocks

memdebug_check:

Look for blocks allocated since mark that haven't been freed

memdebug_ptrchk:

Check validity of a pointer's fence-posts

memdebug_sweep:

Check validity of all allocated block's fence-posts

These routines are internal to the memdebug library, but may be worth overriding in your system.

memdebug_printf:

A standard printf-style routine that can be guaranteed to not allocate any memory.

memdebug_bogosity:

Dumps information about an allocation block when an error in the block is detected.

memdebug_store_backtrace:

Stores a back-trace (the call-stack) in a provided buffer.

• 19.3.1 memdebug_mark: Mark all currently allocated blocks.
• 19.3.2 memdebug_check: Look for blocks allocated since mark that haven't been freed.
• 19.3.3 memdebug_ptrchk: Check validity of a pointer's fence-posts
• 19.3.4 memdebug_sweep: Check validity of all allocated block's fence-posts
• 19.3.5 memdebug_printf: A printf-style routine guaranteed not to allocate memory
• 19.3.6 memdebug_bogosity: Prints a memdebug bogosity message
• 19.3.7 memdebug_store_backtrace: Stores call-stack trace in provided buffer