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1//===-- Implementation header for setjmp ------------------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_LIBC_SRC_SETJMP_SETJMP_IMPL_H10#define LLVM_LIBC_SRC_SETJMP_SETJMP_IMPL_H11 12// This header has the _impl prefix in its name to avoid conflict with the13// public header setjmp.h which is also included. here.14#include "hdr/types/jmp_buf.h"15#include "src/__support/macros/config.h"16#include "src/__support/macros/properties/compiler.h"17 18namespace LIBC_NAMESPACE_DECL {19 20// TODO(https://github.com/llvm/llvm-project/issues/112427)21// Some of the architecture-specific definitions are marked `naked`, which in22// GCC implies `nothrow`.23//24// Right now, our aliases aren't marked `nothrow`, so we wind up in a situation25// where clang will emit -Wmissing-exception-spec if we add `nothrow` here, but26// GCC will emit -Wmissing-attributes here without `nothrow`. We need to update27// LLVM_LIBC_FUNCTION to denote when a function throws or not.28 29#ifdef LIBC_COMPILER_IS_GCC30[[gnu::nothrow]]31#endif32[[gnu::returns_twice]] int33setjmp(jmp_buf buf);34 35} // namespace LIBC_NAMESPACE_DECL36 37#endif // LLVM_LIBC_SRC_SETJMP_SETJMP_IMPL_H38