libsanitizer/sanitizer_common/sanitizer_syscall_generic.inc

   1 //===-- sanitizer_syscall_generic.inc ---------------------------*- 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 // Generic implementations of internal_syscall* and internal_iserror.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 // NetBSD uses libc calls directly
  14 #if !SANITIZER_NETBSD
  15
  16 #if SANITIZER_FREEBSD || SANITIZER_MAC || SANITIZER_SOLARIS
  17 # define SYSCALL(name) SYS_ ## name
  18 #else
  19 # define SYSCALL(name) __NR_ ## name
  20 #endif
  21
  22 #if defined(__x86_64__) && (SANITIZER_FREEBSD || SANITIZER_MAC)
  23 # define internal_syscall __syscall
  24 # else
  25 # define internal_syscall syscall
  26 #endif
  27
  28 #endif
  29
  30 bool internal_iserror(uptr retval, int *rverrno) {
  31   if (retval == (uptr)-1) {
  32     if (rverrno)
  33       *rverrno = errno;
  34     return true;
  35   } else {
  36     return false;
  37   }
  38 }