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The rust programming language reference cycles can leak memory rust's memory safety guarantees make it difficult, but not impossible, to accidentally create memory that is never cleaned up (known as a memory leak) This can be done, for example, using the. Preventing memory leaks entirely is not one of rust's guarantees, meaning memory leaks are memory safe in rust.
However, it is safe to assume that in rust, you do not have any memory leak, unless you do a very specific thing You choose to leak memory, intentionally Also, note that if you adopt a loose definition of the memory leak, there are infinite ways to create one, for example, by adding some data in a container without releasing the unused one.
My rust program (well, game) is leaking memory, 4mb/s
How do i pinpoint the issue The only ffi library i'm using is imgui, so i'd place my first bets there although the drop implementations do work in other stages At the current rate, it only takes a few minutes to jump from 21mbs to 1.6gbs of memory usage Learn how to manage memory leaks in rust, avoid unsafe behavior, and use tools like weak references to ensure efficient programs.
Rust devs — don't let your app silently bleed memory Learn how to plug the leaks with simple, effective fixes for ownership, cycles, and async gone wrong. Memory leakage in rust is completely safe.until you run out and it results in your program being killed by the kernel Learn how we solved this issue to eliminate memory leaks.
Remember, rust's memory safety features are there to help us, not to make our lives difficult
By understanding the potential pitfalls of tools like rc and refcell, we can harness their power while avoiding the dark side of memory leaks and runtime panics. These memory leaks are the kind you're more likely to run into in rust, as (as you've noted) normal use of ownership & destructors will typically clean up memory when it becomes unreachable, statically (it's still possible to cause systems level leaks without manuallydrop or box::leak, though. Thus, allowing mem::forget from safe code does not fundamentally change rust's safety guarantees
That said, leaking resources such as memory or i/o objects is usually undesirable The need comes up in some specialized use cases for ffi or unsafe code, but even then, manuallydrop is typically preferred.
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