From 6ac25306fddb5bbf8637d8cf1376cd691e56c52f Mon Sep 17 00:00:00 2001
From: Chayim Refael Friedman <chayimfr@gmail.com>
Date: Wed, 16 Apr 2025 16:56:45 +0300
Subject: [PATCH] Fix signature of libc memory usage function on Linux

A soundness issue!
---
 src/tools/rust-analyzer/crates/profile/src/memory_usage.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/tools/rust-analyzer/crates/profile/src/memory_usage.rs b/src/tools/rust-analyzer/crates/profile/src/memory_usage.rs
index f5b8eca060f9..1462259d627b 100644
--- a/src/tools/rust-analyzer/crates/profile/src/memory_usage.rs
+++ b/src/tools/rust-analyzer/crates/profile/src/memory_usage.rs
@@ -78,7 +78,8 @@ fn memusage_linux() -> MemoryUsage {
         let alloc = unsafe { libc::mallinfo() }.uordblks as isize;
         MemoryUsage { allocated: Bytes(alloc) }
     } else {
-        let mallinfo2: fn() -> libc::mallinfo2 = unsafe { std::mem::transmute(mallinfo2) };
+        let mallinfo2: extern "C" fn() -> libc::mallinfo2 =
+            unsafe { std::mem::transmute(mallinfo2) };
         let alloc = mallinfo2().uordblks as isize;
         MemoryUsage { allocated: Bytes(alloc) }
     }