[libcxx-commits] [libcxx] [ASan][libc++] Turn on ASan annotations for short strings (PR #75882)

[via libcxx-commits]

AdvenamTacet wrote:

Based on https://github.com/llvm/llvm-project/pull/75845/files#r1431877764, I'm going to look at this test case and understand what is happening there for sure:
```cpp
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// <string>

#include <string>
#include <cassert>

#include "asan_testing.h"

constexpr std::string s = "abcdef";

 // launder 's' through a non-constexpr function
std::string const&  hide() { return s; }

/* not constinit */
std::string s2 = hide();

int main() {
  //LIBCPP_ASSERT(is_string_asan_correct(s));
  LIBCPP_ASSERT(is_string_asan_correct(s2));
  //LIBCPP_ASSERT(is_string_asan_correct(hide()));
  assert(s == "abcdef");
  assert(s2 == "abcdef");
  assert(hide() == "abcdef");
}
```

This shouldn't affect other PRs.

https://github.com/llvm/llvm-project/pull/75882