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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLVM_LIBC_SRC_SETJMP_SETJMP_IMPL_H 10 #define LLVM_LIBC_SRC_SETJMP_SETJMP_IMPL_H 11 12 // This header has the _impl prefix in its name to avoid conflict with the 13 // 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 18 namespace 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 in 22 // GCC implies `nothrow`. 23 // 24 // Right now, our aliases aren't marked `nothrow`, so we wind up in a situation 25 // where clang will emit -Wmissing-exception-spec if we add `nothrow` here, but 26 // GCC will emit -Wmissing-attributes here without `nothrow`. We need to update 27 // LLVM_LIBC_FUNCTION to denote when a function throws or not. 28 29 #ifdef LIBC_COMPILER_IS_GCC 30 [[gnu::nothrow]] 31 #endif 32 int setjmp(jmp_buf buf); 33 34 } // namespace LIBC_NAMESPACE_DECL 35 36 #endif // LLVM_LIBC_SRC_SETJMP_SETJMP_IMPL_H 37