Man Pages – Linux Manual Pages

calloc, malloc, free, realloc – Allocate and free dynamic memory
USAGE
#include <stdlib.h>

void *calloc(size_t nmemb, size_t size);
void *malloc(size_t size);
void free(void *ptr);
void *realloc(void [...]

brk, sbrk – change data segment size
USAGE
#include <unistd.h>

int brk(void *end_data_segment);

void *sbrk(intptr_t increment);

DESCRIPTION
brk() sets the end of the data segment to [...]

alloca – memory allocator
USAGE
#include <alloca.h>

void *alloca(size_t size);

DESCRIPTION
The alloca() function allocates size bytes of space in the stack frame
of the caller. This temporary space is automatically [...]