A small C library for detecting memory leaks, tracking memory usage and detecting invalid frees or reallocs. The library consists of two files (dmt.c and dmt.h) and provides wrappers for the 4 main dynamic memory functions in C (malloc, calloc, realloc and free). The library is currently thread unsafe.
The library should be dropped inside a C project and compiled along with it. The library provides the following macros and functions:
void* dmt_malloc(size_t size)A wrapper formallocvoid* dmt_calloc(size_t num, size_t size)A wrapper forcallocvoid* dmt_realloc(void* ptr, size_t size)A wrapper forreallocvoid dmt_free(void *ptr)A wrapper forfreesize_t dmt_size(void* ptr)Returns the size in bytes of a pointer's allocationvoid dmt_dump(FILE* fp)Dumps information about the currently unfreed allocationssize_t dmt_usage(void)Returns the total number of bytes currently allocatedint dmt_has(void* ptr)Returns non-zero if the pointer is allocated by dmt
The wrapper macros (dmt_malloc, dmt_calloc, dmt_realloc and dmt_free) should be used in place of the functions which they wrap (malloc, calloc, realloc and free). Their arguments and return values match those of the functions they wrap.
Additional options can be set by defining the following macros:
DMT_UNSAFEAvoids checking whether a pointer passed todmt_freeordmt_reallocis valid -- this may offer a noticable speed increase in programs with many allocationsDMT_ABORT_NULLIf malloc, calloc or realloc return withNULL, the program will abort with an errorDMT_STACK_TRACE(Linux only) When usingdmt_dumpeach unfreed allocation is also accompanied with a stack trace from when the allocation was made. Additionally, if the program aborts with an error it will dump a stack trace to stderr
This library is free software; you can redistribute it and/or modify it under the terms of the MIT license. See LICENSE for details.