diff options
Diffstat (limited to 'llvm/lib/Support/Unix/Program.inc')
| -rw-r--r-- | llvm/lib/Support/Unix/Program.inc | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/llvm/lib/Support/Unix/Program.inc b/llvm/lib/Support/Unix/Program.inc index 5d9757b..2742734 100644 --- a/llvm/lib/Support/Unix/Program.inc +++ b/llvm/lib/Support/Unix/Program.inc @@ -173,10 +173,11 @@ toNullTerminatedCStringArray(ArrayRef<StringRef> Strings, StringSaver &Saver) { } static bool Execute(ProcessInfo &PI, StringRef Program, - ArrayRef<StringRef> Args, std::optional<ArrayRef<StringRef>> Env, + ArrayRef<StringRef> Args, + std::optional<ArrayRef<StringRef>> Env, ArrayRef<std::optional<StringRef>> Redirects, unsigned MemoryLimit, std::string *ErrMsg, - BitVector *AffinityMask) { + BitVector *AffinityMask, bool DetachProcess) { if (!llvm::sys::fs::exists(Program)) { if (ErrMsg) *ErrMsg = std::string("Executable \"") + Program.str() + @@ -202,7 +203,8 @@ static bool Execute(ProcessInfo &PI, StringRef Program, // If this OS has posix_spawn and there is no memory limit being implied, use // posix_spawn. It is more efficient than fork/exec. #ifdef HAVE_POSIX_SPAWN - if (MemoryLimit == 0) { + // Cannot use posix_spawn if you would like to detach the process + if (MemoryLimit == 0 && !DetachProcess) { posix_spawn_file_actions_t FileActionsStore; posix_spawn_file_actions_t *FileActions = nullptr; @@ -270,7 +272,7 @@ static bool Execute(ProcessInfo &PI, StringRef Program, return true; } -#endif +#endif // HAVE_POSIX_SPAWN // Create a child process. int child = fork(); @@ -307,6 +309,14 @@ static bool Execute(ProcessInfo &PI, StringRef Program, } } + if (DetachProcess) { + // Detach from controlling terminal + if (::setsid() == -1) { + MakeErrMsg(ErrMsg, "Could not detach process, ::setsid failed"); + return false; + } + } + // Set memory limits if (MemoryLimit != 0) { SetMemoryLimits(MemoryLimit); |