1 //===--- ToolOutputFile.cpp - Implement the ToolOutputFile class --------===// 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 // This implements the ToolOutputFile class. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/Support/ToolOutputFile.h" 14 #include "llvm/Support/FileSystem.h" 15 #include "llvm/Support/Signals.h" 16 using namespace llvm; 17 18 static bool isStdout(StringRef Filename) { return Filename == "-"; } 19 20 ToolOutputFile::CleanupInstaller::CleanupInstaller(StringRef Filename) 21 : Filename(std::string(Filename)), Keep(false) { 22 // Arrange for the file to be deleted if the process is killed. 23 if (!isStdout(Filename)) 24 sys::RemoveFileOnSignal(Filename); 25 } 26 27 ToolOutputFile::CleanupInstaller::~CleanupInstaller() { 28 if (isStdout(Filename)) 29 return; 30 31 // Delete the file if the client hasn't told us not to. 32 if (!Keep) 33 sys::fs::remove(Filename); 34 35 // Ok, the file is successfully written and closed, or deleted. There's no 36 // further need to clean it up on signals. 37 sys::DontRemoveFileOnSignal(Filename); 38 } 39 40 ToolOutputFile::ToolOutputFile(StringRef Filename, std::error_code &EC, 41 sys::fs::OpenFlags Flags) 42 : Installer(Filename) { 43 if (isStdout(Filename)) { 44 OS = &outs(); 45 EC = std::error_code(); 46 return; 47 } 48 OSHolder.emplace(Filename, EC, Flags); 49 OS = &*OSHolder; 50 // If open fails, no cleanup is needed. 51 if (EC) 52 Installer.Keep = true; 53 } 54 55 ToolOutputFile::ToolOutputFile(StringRef Filename, int FD) 56 : Installer(Filename) { 57 OSHolder.emplace(FD, true); 58 OS = &*OSHolder; 59 } 60