LC

Custom Allocator in Rust

hard4/10

Unsafe Rust: Raw Pointers No-Std Rust Program

Language

Compiler

2.0s Limit 256MB

Implementation

Why This Matters

Rust's GlobalAlloc trait lets you swap allocators fleet-wide — Discord moved services to jemalloc and companies routinely use mimalloc for wins — and embedded Rust requires writing your own for heapless targets. Implementing one teaches the alignment/layout contract that underlies every Box and Vec.

Hints

0 / 3 revealed

Sample validation

Sample case for Run. Submit grades this sample plus all hidden tests.

main.c

Workspace 1.0

Implement a custom allocator using the GlobalAlloc trait in Rust.

Requirements:

Implement bump pointer allocator
Handle alignment requirements
Track allocation size
Implement alloc and dealloc
Register as global allocator
Test with Vec, Box, etc.
Handle out of memory gracefully