Merging upstream version 1.74.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/library/std/src/sys/uefi/tests.rs b/library/std/src/sys/uefi/tests.rs
new file mode 100644
index 000000000..8806eda3a
--- /dev/null
+++ b/library/std/src/sys/uefi/tests.rs
@@ -0,0 +1,21 @@
+use super::alloc::*;
+
+#[test]
+fn align() {
+    // UEFI ABI specifies that allocation alignment minimum is always 8. So this can be
+    // statically verified.
+    assert_eq!(POOL_ALIGNMENT, 8);
+
+    // Loop over allocation-request sizes from 0-256 and alignments from 1-128, and verify
+    // that in case of overalignment there is at least space for one additional pointer to
+    // store in the allocation.
+    for i in 0..256 {
+        for j in &[1, 2, 4, 8, 16, 32, 64, 128] {
+            if *j <= 8 {
+                assert_eq!(align_size(i, *j), i);
+            } else {
+                assert!(align_size(i, *j) > i + std::mem::size_of::<*mut ()>());
+            }
+        }
+    }
+}