Disable sanitizer's on ifunc resolvers.

Resolvers are running before the module is initialised which leads to
crashes due to the santizer is not yet initialised.

Fixes #40287

Reviewed By: hctim

Differential Revision: https://reviews.llvm.org/D150262

1 files changed, 3 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 1c48d3b..3a79dec 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -5832,7 +5832,9 @@ void CodeGenModule::emitIFuncDefinition(GlobalDecl GD) {
     Entry->eraseFromParent();
   } else
     GIF->setName(MangledName);
-
+  if (auto *F = dyn_cast<llvm::Function>(Resolver)) {
+    F->addFnAttr(llvm::Attribute::DisableSanitizerInstrumentation);
+  }
   SetCommonAttributes(GD, GIF);
 }