malloc/src, branch master

Fix stale filename comment, const qualifier, and int-to-size_t casts

2026-02-27T11:16:47Z

- test_preload.c: @file main.c -> @file test_preload.c - show_alloc_mem.c, test_preload.c: hex array -> static const - show_alloc_mem.c, test_preload.c, test_random.c: use size_t for sizeof-derived indices instead of casting to int

Implement realloc and add realloc rounds to random test

2026-02-27T11:02:16Z

realloc returns the same pointer if the chunk is large enough, otherwise malloc + memcpy + free. The random test now verifies data integrity after resizing across all three categories.

Implement free and add testing notes to README

2026-02-27T10:45:06Z

free now locates the chunk matching the pointer, marks it as free for TINY/SMALL zones, and munmaps LARGE allocations. Document why ASan is incompatible and list alternatives.

Add chunk splitting and free-chunk search, use sysconf for page size

2026-02-27T10:13:19Z

malloc now searches zones for a free chunk, splits it to the requested aligned size, and allocates a new zone when none have space. Replace getpagesize() with sysconf(_SC_PAGESIZE).

Add show_alloc_mem and test_show, rename test to test_preload

2026-02-27T10:04:07Z

Implement show_alloc_mem() to print all zones and allocations by ascending address. Add test_show binary that links directly against libft_malloc.so to exercise it.

Add zone allocation, internal data structures, and README

2026-02-27T09:31:39Z

Implement mmap-based zone allocation for TINY (<=128B) and SMALL (<=1024B) categories. malloc now creates zones on demand and returns a pointer to the first chunk.

Initial scaffold: Makefile, stub malloc/free/realloc, test harness

2026-02-22T11:42:48Z

Build system produces libft_malloc_$HOSTTYPE.so shared library with Libft (NOMALLOC=1) as dependency. Stub functions print their name and return NULL. Test runner compares system malloc vs LD_PRELOAD output using write(2) to avoid stdio interference.