On Tue 04-07-17 14:19:00, Ximin Luo wrote: [...] > I've written up an explanation of what happens in the Rust case here: > > https://github.com/rust-lang/rust/issues/43052
The most important part is https://github.com/rust-lang/rust/blob/master/src/libstd/sys/unix/thread.rs#L248 // Rellocate the last page of the stack. // This ensures SIGBUS will be raised on // stack overflow. let result = mmap(stackaddr, psize, PROT_NONE, MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0); so this is basically the same thing Java does. Except that Java doesn't do that on main thread usually. Only some JNI runtimes do that. pthread_attr_getstack() usage on the main thread sounds like a real bug in rust to me. Thanks for the writeup! -- Michal Hocko SUSE Labs
