Comment by p2detar
4 days ago
What is your definition of memory issues?
Of course you can have memory corruption in Java. The easiest way is to spawn 2 threads that write to the same ByteBuffer without write locks.
4 days ago
What is your definition of memory issues?
Of course you can have memory corruption in Java. The easiest way is to spawn 2 threads that write to the same ByteBuffer without write locks.
And you would get garbled up bytes in application logic. But it has absolutely no way to mess up the runtime's state, so any future code can still execute correctly.
Meanwhile a memory issue in C/Rust and even Go will immediately drop every assumption out the window, the whole runtime is corrupted from that point on. If we are lucky, it soon ends in a segfault, if we are less lucky it can silently cause much bigger problems.
So there are objective distinctions to have here, e.g. Rust guarantees that the source of such a corruption can only be an incorrect `unsafe` block, and Java flat out has no platform-native unsafe operations, even under data races. Go can segfault with data races on fat pointers.
Of course every language capable of FFI calls can corrupt its runtime, Java is no exception.
> Meanwhile a memory issue in C/Rust and even Go will immediately drop every assumption out the window, the whole runtime is corrupted from that point on.
In C, yes. In Rust, I have no real experience. In Go, as you pointed out, it should segfault, which is not great, but still better than in C, i.e., fail early. So I don't get or understand what your next comment means? What is a "less lucky" example in Go?
> If we are lucky, it soon ends in a segfault, if we are less lucky it can silently cause much bigger problems.
Silent corruption of unrelated data structures in memory. Segfault only happens if you are accessing memory outside the program's valid address space. But it can just as easily happen that you corrupt something in the runtime, and the GC will run havoc, or cause a million other kind of very hard to debug errors.
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