lldb/source/Host/macosx/objcxx/PosixSpawnResponsible.h

   1 //===-- PosixSpawnResponsible.h ---------------------------------*- 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 LLDB_HOST_POSIXSPAWNRESPONSIBLE_H
  10 #define LLDB_HOST_POSIXSPAWNRESPONSIBLE_H
  11
  12 #include <spawn.h>
  13
  14 #if __has_include(<responsibility.h>)
  15 #include <dispatch/dispatch.h>
  16 #include <dlfcn.h>
  17 #include <responsibility.h>
  18
  19 // Older SDKs  have responsibility.h but not this particular function. Let's
  20 // include the prototype here.
  21 errno_t responsibility_spawnattrs_setdisclaim(posix_spawnattr_t *attrs,
  22                                               bool disclaim);
  23
  24 #endif
  25
  26 static inline int setup_posix_spawn_responsible_flag(posix_spawnattr_t *attr) {
  27   if (@available(macOS 10.14, *)) {
  28 #if __has_include(<responsibility.h>)
  29     static __typeof__(responsibility_spawnattrs_setdisclaim)
  30         *responsibility_spawnattrs_setdisclaim_ptr;
  31     static dispatch_once_t pred;
  32     dispatch_once(&pred, ^{
  33       responsibility_spawnattrs_setdisclaim_ptr =
  34           reinterpret_cast<__typeof__(&responsibility_spawnattrs_setdisclaim)>
  35           (dlsym(RTLD_DEFAULT, "responsibility_spawnattrs_setdisclaim"));
  36     });
  37     if (responsibility_spawnattrs_setdisclaim_ptr)
  38       return responsibility_spawnattrs_setdisclaim_ptr(attr, true);
  39 #endif
  40   }
  41   return 0;
  42 }
  43
  44 #endif // LLDB_HOST_POSIXSPAWNRESPONSIBLE_H