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The C programming language manages memory statically, automatically, or dynamically.Static-duration variables are allocated in main memory, usually along with the executable code of the program, and persist for the lifetime of the program; automatic-duration variables are allocated on the stack and come and go as functions are called and return.
A cache is a storage for a specific type of object, such as semaphores, process descriptors, file objects, etc. Slab: slab represents a contiguous piece of memory, usually made of several virtually contiguous pages. The slab is the actual container of data associated with objects of the specific kind of the containing cache.
musl was designed from scratch to allow efficient static linking and to have realtime-quality robustness by avoiding race conditions, internal failures on resource exhaustion, and various other bad worst-case behaviors present in existing implementations. [4]
Dmalloc is a C memory debugger library written by Gray Watson to assist programmers in finding a variety of dynamic memory allocation mistakes. It replaces parts (such as malloc) of the C standard library provided by the operating system or compiler with its own versions, which produce information intended to help the programmer detect problematic code.
In a multithreaded application a problem exists that one thread could temporarily remove the hook while another thread could malloc memory leading to missed allocations. The function mtrace installs handlers for malloc, realloc and free; the function muntrace disables these handlers. Their prototypes, defined in the header file mcheck.h, are
SystemTap probes for malloc. GNU Indirect Function (IFUNC) support for ppc32 and ppc64. New feature test macro _DEFAULT_SOURCE to replace _SVID_SOURCE and _BSD_SOURCE. Preliminary safety documentation for all functions in the manual. ABI change in ucontext and jmp_buf for s390/s390x. 2.20: September 2014: Support for file description locks 2.21 ...
In the code, the function would examine the size of original and then malloc times that length to set aside memory for the string it will build. That malloc is invisible to the functions calling it, if they fail to later release the memory, a leak will occur. In Zig, this might be handled using a function like:
mimalloc (pronounced "me-malloc") is a free and open-source compact general-purpose memory allocator developed by Microsoft [2] with focus on performance characteristics. The library is about 11000 lines of code and works as a drop-in replacement for malloc of the C standard library [3] and requires no additional code changes.