[HIP] disable sanitizer for __hip_cuid

[yxsamliu]

Global variable __hip_cuid_* is for identifying purpose and does not need sanitization, therefore disable it for sanitizers.

[Copilot]

Pull Request Overview

This PR disables sanitization for the __hip_cuid globals since they are used only for identification. Key changes include adding a new test case to verify that the __hip_cuid global variable is not sanitized and updating CodeGenModule to disable sanitizer processing for this global.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
clang/test/CodeGenCUDA/nosanitize-cuid.hip	Added a test to verify that __hip_cuid globals are excluded from sanitization.
clang/lib/CodeGen/CodeGenModule.cpp	Updated the module to disable sanitization for __hip_cuid globals.

[llvmbot]

@llvm/pr-subscribers-clang

@llvm/pr-subscribers-clang-codegen

Author: Yaxun (Sam) Liu (yxsamliu)

Changes

Global variable __hip_cuid_* is for identifying purpose and does not need sanitization, therefore disable it for sanitizers.

---

Full diff: https://github.com/llvm/llvm-project/pull/141581.diff

2 Files Affected:

• (modified) clang/lib/CodeGen/CodeGenModule.cpp (+1)
• (added) clang/test/CodeGenCUDA/nosanitize-cuid.hip (+6)

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 16e010adbeb5f..039507bc03510 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -971,6 +971,7 @@ void CodeGenModule::Release() {
         getModule(), Int8Ty, false, llvm::GlobalValue::ExternalLinkage,
         llvm::Constant::getNullValue(Int8Ty),
         "__hip_cuid_" + getContext().getCUIDHash());
+    getSanitizerMetadata()->disableSanitizerForGlobal(GV);
     addCompilerUsedGlobal(GV);
   }
   emitLLVMUsed();
diff --git a/clang/test/CodeGenCUDA/nosanitize-cuid.hip b/clang/test/CodeGenCUDA/nosanitize-cuid.hip
new file mode 100644
index 0000000000000..4af83c91ac883
--- /dev/null
+++ b/clang/test/CodeGenCUDA/nosanitize-cuid.hip
@@ -0,0 +1,6 @@
+// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -fsanitize=address -fcuda-is-device \
+// RUN:    -emit-llvm -cuid=abcd -o - %s | FileCheck  %s
+
+#include "Inputs/cuda.h"
+
+// CHECK: @__hip_cuid_{{.*}} = {{.*}} no_sanitize_address