Vendor things

third-party/vendor/stacker/tests/simple.rs

@@ -0,0 +1,27 @@
+extern crate stacker;
+
+const RED_ZONE: usize = 100 * 1024; // 100k
+const STACK_PER_RECURSION: usize = 1 * 1024 * 1024; // 1MB
+
+pub fn ensure_sufficient_stack<R, F: FnOnce() -> R + std::panic::UnwindSafe>(f: F) -> R {
+    stacker::maybe_grow(RED_ZONE, STACK_PER_RECURSION, f)
+}
+
+#[inline(never)]
+fn recurse(n: usize) {
+    let x = [42u8; 50000];
+    if n != 0 {
+        ensure_sufficient_stack(|| recurse(n - 1));
+    }
+    drop(x);
+}
+
+#[test]
+fn foo() {
+    let limit = if cfg!(target_arch = "wasm32") {
+        2000
+    } else {
+        10000
+    };
+    recurse(limit);
+}