libc/src/setjmp/longjmp.h

   1 //===-- Implementation header for longjmp -----------------------*- 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_LONGJMP_H
  10 #define LLVM_LIBC_SRC_SETJMP_LONGJMP_H
  11
  12 #include "hdr/types/jmp_buf.h"
  13 #include "src/__support/macros/config.h"
  14 #include "src/__support/macros/properties/compiler.h"
  15
  16 namespace LIBC_NAMESPACE_DECL {
  17
  18 // TODO(https://github.com/llvm/llvm-project/issues/112427)
  19 // Some of the architecture-specific definitions are marked `naked`, which in
  20 // GCC implies `nothrow`.
  21 //
  22 // Right now, our aliases aren't marked `nothrow`, so we wind up in a situation
  23 // where clang will emit -Wmissing-exception-spec if we add `nothrow` here, but
  24 // GCC will emit -Wmissing-attributes here without `nothrow`. We need to update
  25 // LLVM_LIBC_FUNCTION to denote when a function throws or not.
  26
  27 #ifdef LIBC_COMPILER_IS_GCC
  28 [[gnu::nothrow]]
  29 #endif
  30 void longjmp(jmp_buf buf, int val);
  31
  32 } // namespace LIBC_NAMESPACE_DECL
  33
  34 #endif // LLVM_LIBC_SRC_SETJMP_LONGJMP_H