### _dump_allocated -- Get Information about Allocated Memory

Format

>     #include <stdlib.h>   /* also in <malloc.h> */
>     void _dump_allocated(int nbytes);

Language Level: Extension
_dump_allocated prints information to stderr about each memory block that is currently allocated and was allocated using the debug memory management functions (_debug_calloc, _debug_malloc, and so on).

Use nbytes to specify how many bytes of each memory block are to be printed. If nbytes is a:

Negative value | Prints all bytes of each block.
0 | Prints no bytes.
Positive value | Prints the specified number of bytes or the entire block, whichever is smaller.

Call _dump_allocated at points in your code where you want a report of the currently allocated memory. For example, a good place to call _dump_allocated is a point where most of the memory is already freed and you want to find a memory leak, such as at the end of a program.

_dump_allocated prints the information to stderr, but you can change the destination with the _set_crt_msg_handle function. You can also use _dump_allocated_delta to display information only about the memory that was allocated since the previous call to _dump_allocated or _dump_allocated_delta.

To use _dump_allocated and the debug memory management functions, you must compile with the debug memory (/Tm) compiler option.

Note: The /Tm option maps all calls to memory management functions (including a heap-specific version and a tiled version for OS/2) to their debug counterparts. To prevent a call from being mapped, parenthesize the function name.

A heap-specific version of this function and a tiled version for OS/2, (_udump_allocated and _tdump_allocated) are also available. _dump_allocated always prints information about memory allocated from the default heap.

Return Value
There is no return value.

Example

Managing Memory with Multiple Heaps
Memory Management

_debug_calloc -- Allocate and Initialize Memory
_debug_free -- Release Memory
_debug_malloc -- Allocate Memory
_debug_realloc -- Reallocate Memory Block
_dump_allocated_delta -- Get Information about Allocated Memory
_heap_check -- Validate Default Memory Heap
_udump_allocated -- Get Information about Allocated Memory in Heap
<malloc.h>
<stdlib.h>
/Tm compiler option