[libc-commits] [libc] [libc] try fixing LlvmLibcStackChkFail.Smash again (PR #75967)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libc

Author: Nick Desaulniers (nickdesaulniers)

<details>
<summary>Changes</summary>

Looks like adding attributes to lambdas wasn't added to ISO C++ until C++23.
Forget lambdas and just use a static function.


---
Full diff: https://github.com/llvm/llvm-project/pull/75967.diff


1 Files Affected:

- (modified) libc/test/src/compiler/stack_chk_guard_test.cpp (+8-6) 


``````````diff
diff --git a/libc/test/src/compiler/stack_chk_guard_test.cpp b/libc/test/src/compiler/stack_chk_guard_test.cpp
index 6f1bd73b1faa3b..18bdc8f2a6e2ed 100644
--- a/libc/test/src/compiler/stack_chk_guard_test.cpp
+++ b/libc/test/src/compiler/stack_chk_guard_test.cpp
@@ -15,11 +15,13 @@ TEST(LlvmLibcStackChkFail, Death) {
   EXPECT_DEATH([] { __stack_chk_fail(); }, WITH_SIGNAL(SIGABRT));
 }
 
+// Disable asan so that it doesn't immediately fail after the memset, but before
+// the stack canary is re-checked.
+[[gnu::no_sanitize_address]] static void smash_stack() {
+  int arr[20];
+  LIBC_NAMESPACE::memset(arr, 0xAA, 2001);
+}
+
 TEST(LlvmLibcStackChkFail, Smash) {
-  EXPECT_DEATH(
-      [] [[gnu::no_sanitize]] {
-        int arr[20];
-        LIBC_NAMESPACE::memset(arr, 0xAA, 2001);
-      },
-      WITH_SIGNAL(SIGABRT));
+  EXPECT_DEATH(smash_stack, WITH_SIGNAL(SIGABRT));
 }

``````````

</details>


https://github.com/llvm/llvm-project/pull/75967