Petro Karashchenko 5a298e8685 mm: memory allocations return valid pointer when request 0 size ... This change introduce 2 items: 1. If the size of the space requested is 0, the behavior is implementation-defined: either a null pointer shall be returned, or the behavior shall be as if the size were some non-zero value, except that the behavior is undefined if the returned pointer is used to access an object. Change the behavior to be similar to Linux and Android and allocates an object of a minimum size instead of returning null pointer. https://pubs.opengroup.org/onlinepubs/9699919799/functions/malloc.html https://pubs.opengroup.org/onlinepubs/9699919799/functions/calloc.html https://pubs.opengroup.org/onlinepubs/9699919799/functions/realloc.html 2. The description of realloc() has been modified from previous versions of this standard to align with the ISO/IEC 9899:1999 standard. Previous versions explicitly permitted a call to realloc (p, 0) to free the space pointed to by p and return a null pointer. While this behavior could be interpreted as permitted by this version of the standard, the C language committee have indicated that this interpretation is incorrect. Applications should assume that if realloc() returns a null pointer, the space pointed to by p has not been freed. Since this could lead to double-frees, implementations should also set errno if a null pointer actually indicates a failure, and applications should only free the space if errno was changed. Do not free memory of zero-length reallocation is requested https://pubs.opengroup.org/onlinepubs/9699919799/functions/realloc.html Co-authored-by: fangxinyong <fangxinyong@xiaomi.com> Signed-off-by: Petro Karashchenko <petro.karashchenko@gmail.com>		2023-05-02 18:29:29 -06:00
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Make.defs	Replace nxsem API when used as a lock with nxmutex API	2022-10-17 15:59:46 +09:00
mm_addfreechunk.c	mm: support custom the mm alignment and default to be 8	2023-03-06 11:10:36 +08:00
mm_brkaddr.c	mm: Remove mm_heap_impl_s struct	2021-07-07 04:25:15 -07:00
mm_calloc.c	mm: memory allocations return valid pointer when request 0 size	2023-05-02 18:29:29 -06:00
mm_checkcorruption.c	mm: support custom the mm alignment and default to be 8	2023-03-06 11:10:36 +08:00
mm_extend.c	mm: move preceding to previous free node to reduce the overhead	2023-02-01 11:14:02 +08:00
mm_foreach.c	mm: move preceding to previous free node to reduce the overhead	2023-02-01 11:14:02 +08:00
mm_free.c	mm: move preceding to previous free node to reduce the overhead	2023-02-01 11:14:02 +08:00
mm_heapmember.c	mm: Remove mm_heap_impl_s struct	2021-07-07 04:25:15 -07:00
mm_initialize.c	memepool:fix memory consumption double counting issue	2023-04-23 23:28:32 +08:00
mm_lock.c	sched/getpid: replace syscall getpid/tid/ppid() to kernel version	2023-02-02 10:33:01 +08:00
mm_mallinfo.c	mm:change special pid to macro	2023-04-23 23:28:32 +08:00
mm_malloc_size.c	mm: move preceding to previous free node to reduce the overhead	2023-02-01 11:14:02 +08:00
mm_malloc.c	mm: memory allocations return valid pointer when request 0 size	2023-05-02 18:29:29 -06:00
mm_memalign.c	mm: support custom the mm alignment and default to be 8	2023-03-06 11:10:36 +08:00
mm_memdump.c	mm:change special pid to macro	2023-04-23 23:28:32 +08:00
mm_realloc.c	mm: memory allocations return valid pointer when request 0 size	2023-05-02 18:29:29 -06:00
mm_shrinkchunk.c	mm: support custom the mm alignment and default to be 8	2023-03-06 11:10:36 +08:00
mm_size2ndx.c	mm: support custom the mm alignment and default to be 8	2023-03-06 11:10:36 +08:00
mm_zalloc.c
mm.h	mm_heap: double malloced memory default alignment (4 -> 8, 8 -> 16)	2023-03-06 11:27:43 +01:00