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
isStdout(StringRef Filename)18 static bool isStdout(StringRef Filename) { return Filename == "-"; }
19
CleanupInstaller(StringRef Filename)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
~CleanupInstaller()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
ToolOutputFile(StringRef Filename,std::error_code & EC,sys::fs::OpenFlags Flags)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
ToolOutputFile(StringRef Filename,int FD)55 ToolOutputFile::ToolOutputFile(StringRef Filename, int FD)
56 : Installer(Filename) {
57 OSHolder.emplace(FD, true);
58 OS = &*OSHolder;
59 }
60