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===Heap===
The heap area commonly begins at the end of the .bss and .data segments and grows to larger addresses from there. The heap area is managed by [[malloc]], calloc, realloc, and free, which may use the [[Sbrk|brk]] and [[sbrk]] system calls to adjust its size (note that the use of brk/sbrk and a single "heap area" is not required to fulfill the contract of malloc/calloc/realloc/free; they may also be implemented using [[mmap]] to reserve potentially non-contiguous regions of virtual memory into the process' [[virtual address space]]). The heap area is shared by all threads, shared libraries, and dynamically loaded modules in a process.
===Stack===
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