1 //===-- Process.cpp - Implement OS Process Concept --------------*- 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 // This file implements the operating system Process concept. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/Support/Process.h" 14 #include "llvm/ADT/STLExtras.h" 15 #include "llvm/ADT/StringExtras.h" 16 #include "llvm/Config/config.h" 17 #include "llvm/Config/llvm-config.h" 18 #include "llvm/Support/CrashRecoveryContext.h" 19 #include "llvm/Support/FileSystem.h" 20 #include "llvm/Support/Path.h" 21 #include "llvm/Support/Program.h" 22 23 #include <optional> 24 #include <stdlib.h> // for _Exit 25 26 using namespace llvm; 27 using namespace sys; 28 29 //===----------------------------------------------------------------------===// 30 //=== WARNING: Implementation here must contain only TRULY operating system 31 //=== independent code. 32 //===----------------------------------------------------------------------===// 33 34 std::optional<std::string> 35 Process::FindInEnvPath(StringRef EnvName, StringRef FileName, char Separator) { 36 return FindInEnvPath(EnvName, FileName, {}, Separator); 37 } 38 39 std::optional<std::string> 40 Process::FindInEnvPath(StringRef EnvName, StringRef FileName, 41 ArrayRef<std::string> IgnoreList, char Separator) { 42 assert(!path::is_absolute(FileName)); 43 std::optional<std::string> FoundPath; 44 std::optional<std::string> OptPath = Process::GetEnv(EnvName); 45 if (!OptPath) 46 return FoundPath; 47 48 const char EnvPathSeparatorStr[] = {Separator, '\0'}; 49 SmallVector<StringRef, 8> Dirs; 50 SplitString(*OptPath, Dirs, EnvPathSeparatorStr); 51 52 for (StringRef Dir : Dirs) { 53 if (Dir.empty()) 54 continue; 55 56 if (any_of(IgnoreList, [&](StringRef S) { return fs::equivalent(S, Dir); })) 57 continue; 58 59 SmallString<128> FilePath(Dir); 60 path::append(FilePath, FileName); 61 if (fs::exists(Twine(FilePath))) { 62 FoundPath = std::string(FilePath); 63 break; 64 } 65 } 66 67 return FoundPath; 68 } 69 70 71 #define COLOR(FGBG, CODE, BOLD) "\033[0;" BOLD FGBG CODE "m" 72 73 #define ALLCOLORS(FGBG,BOLD) {\ 74 COLOR(FGBG, "0", BOLD),\ 75 COLOR(FGBG, "1", BOLD),\ 76 COLOR(FGBG, "2", BOLD),\ 77 COLOR(FGBG, "3", BOLD),\ 78 COLOR(FGBG, "4", BOLD),\ 79 COLOR(FGBG, "5", BOLD),\ 80 COLOR(FGBG, "6", BOLD),\ 81 COLOR(FGBG, "7", BOLD)\ 82 } 83 84 static const char colorcodes[2][2][8][10] = { 85 { ALLCOLORS("3",""), ALLCOLORS("3","1;") }, 86 { ALLCOLORS("4",""), ALLCOLORS("4","1;") } 87 }; 88 89 // A CMake option controls wheter we emit core dumps by default. An application 90 // may disable core dumps by calling Process::PreventCoreFiles(). 91 static bool coreFilesPrevented = !LLVM_ENABLE_CRASH_DUMPS; 92 93 bool Process::AreCoreFilesPrevented() { return coreFilesPrevented; } 94 95 [[noreturn]] void Process::Exit(int RetCode, bool NoCleanup) { 96 if (CrashRecoveryContext *CRC = CrashRecoveryContext::GetCurrent()) 97 CRC->HandleExit(RetCode); 98 99 if (NoCleanup) 100 ExitNoCleanup(RetCode); 101 else 102 ::exit(RetCode); 103 } 104 105 // Include the platform-specific parts of this class. 106 #ifdef LLVM_ON_UNIX 107 #include "Unix/Process.inc" 108 #endif 109 #ifdef _WIN32 110 #include "Windows/Process.inc" 111 #endif 112