From 6b58ff5cdf47da9460871a87cf43e5e8adfab9a8 Mon Sep 17 00:00:00 2001
From: "Evgeniy A. Dushistov" <dushistov@mail.ru>
Date: Thu, 11 May 2023 17:35:01 +0300
Subject: Usage of atomic counters for llvm code coverage

---
 compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp')

diff --git a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
index 5ec3b95225d..7b774d6865c 100644
--- a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
@@ -745,6 +745,9 @@ LLVMRustOptimize(
         if (InstrProfileOutput) {
           Options.InstrProfileOutput = InstrProfileOutput;
         }
+        // cargo run tests in multhreading mode by default
+        // so use atomics for coverage counters
+        Options.Atomic = true;
         MPM.addPass(InstrProfiling(Options, false));
       }
     );
-- 
cgit 1.4.1-3-g733a5