From 073e5d4a2a5eff241b87bafeb636b0c94f2f3f47 Mon Sep 17 00:00:00 2001 From: David Carlier Date: Sun, 26 May 2024 14:35:26 +0000 Subject: [PATCH] std::pal::unix::thread fetching min stack size on netbsd. PTHREAD_STACK_MIN is not defined however sysconf/_SC_THREAD_STACK_MIN returns it as it can vary from arch to another. --- library/std/src/sys/pal/unix/thread.rs | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/library/std/src/sys/pal/unix/thread.rs b/library/std/src/sys/pal/unix/thread.rs index 853ef8736de24..1ab54ec57c3b7 100644 --- a/library/std/src/sys/pal/unix/thread.rs +++ b/library/std/src/sys/pal/unix/thread.rs @@ -717,5 +717,14 @@ unsafe fn min_stack_size(_: *const libc::pthread_attr_t) -> usize { #[cfg(target_os = "netbsd")] unsafe fn min_stack_size(_: *const libc::pthread_attr_t) -> usize { - 2048 // just a guess + static STACK: crate::sync::OnceLock = crate::sync::OnceLock::new(); + + *STACK.get_or_init(|| { + let mut stack = unsafe { libc::sysconf(libc::_SC_THREAD_STACK_MIN) }; + if stack < 0 { + stack = 2048; // just a guess + } + + stack as usize + }) }