Fangrui Song bb8230bb2b
[sanitizer] Internalize .preinit_array variables
We can use an internal linkage variable to make it clear the variable is
not exported. The special section .preinit_array is a GC root.

Pull Request: https://github.com/llvm/llvm-project/pull/98584
2024-07-12 11:15:46 -07:00

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//===-- tsan_preinit.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
//
//===----------------------------------------------------------------------===//
//
// This file is a part of ThreadSanitizer.
//
// Call __tsan_init at the very early stage of process startup.
//===----------------------------------------------------------------------===//
#include "sanitizer_common/sanitizer_internal_defs.h"
#include "tsan_interface.h"
#if SANITIZER_CAN_USE_PREINIT_ARRAY
// This section is linked into the main executable when -fsanitize=thread is
// specified to perform initialization at a very early stage.
__attribute__((section(".preinit_array"), used)) static auto preinit =
__tsan_init;
#endif