Set shadowstack to be thread local global variable.

Thread-local stack is essential to avoid race conditions where threads share the same global state.
ykjit · Oct 15, 2023 · 3b07c59 · 3b07c59
1 parent ca1842c
commit 3b07c59
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/llvm/lib/Transforms/Yk/ShadowStack.cpp b/llvm/lib/Transforms/Yk/ShadowStack.cpp
@@ -75,6 +75,7 @@ class YkShadowStack : public ModulePass {
     // allocated for the shadow stack.
     Constant *GShadowStackPtr = M.getOrInsertGlobal(G_SHADOW_STACK, Int8PtrTy);
     GlobalVariable *GVar = M.getNamedGlobal(G_SHADOW_STACK);
+    GVar->setThreadLocal(true);
     GVar->setInitializer(
         ConstantPointerNull::get(cast<PointerType>(Int8PtrTy)));