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 22 #include <optional> 23 #include <stdlib.h> // for _Exit 24 25 using namespace llvm; 26 using namespace sys; 27 28 //===----------------------------------------------------------------------===// 29 //=== WARNING: Implementation here must contain only TRULY operating system 30 //=== independent code. 31 //===----------------------------------------------------------------------===// 32 33 std::optional<std::string> 34 Process::FindInEnvPath(StringRef EnvName, StringRef FileName, char Separator) { 35 return FindInEnvPath(EnvName, FileName, {}, Separator); 36 } 37 38 std::optional<std::string> 39 Process::FindInEnvPath(StringRef EnvName, StringRef FileName, 40 ArrayRef<std::string> IgnoreList, char Separator) { 41 assert(!path::is_absolute(FileName)); 42 std::optional<std::string> FoundPath; 43 std::optional<std::string> OptPath = Process::GetEnv(EnvName); 44 if (!OptPath) 45 return FoundPath; 46 47 const char EnvPathSeparatorStr[] = {Separator, '\0'}; 48 SmallVector<StringRef, 8> Dirs; 49 SplitString(*OptPath, Dirs, EnvPathSeparatorStr); 50 51 for (StringRef Dir : Dirs) { 52 if (Dir.empty()) 53 continue; 54 55 if (any_of(IgnoreList, [&](StringRef S) { return fs::equivalent(S, Dir); })) 56 continue; 57 58 SmallString<128> FilePath(Dir); 59 path::append(FilePath, FileName); 60 if (fs::exists(Twine(FilePath))) { 61 FoundPath = std::string(FilePath); 62 break; 63 } 64 } 65 66 return FoundPath; 67 } 68 69 // clang-format off 70 #define COLOR(FGBG, CODE, BOLD) "\033[0;" BOLD FGBG CODE "m" 71 72 #define ALLCOLORS(FGBG, BRIGHT, BOLD) \ 73 { \ 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 COLOR(BRIGHT, "0", BOLD), \ 83 COLOR(BRIGHT, "1", BOLD), \ 84 COLOR(BRIGHT, "2", BOLD), \ 85 COLOR(BRIGHT, "3", BOLD), \ 86 COLOR(BRIGHT, "4", BOLD), \ 87 COLOR(BRIGHT, "5", BOLD), \ 88 COLOR(BRIGHT, "6", BOLD), \ 89 COLOR(BRIGHT, "7", BOLD), \ 90 } 91 92 // bg 93 // | bold 94 // | | 95 // | | codes 96 // | | | 97 // | | | 98 static const char colorcodes[2][2][16][11] = { 99 { ALLCOLORS("3", "9", ""), ALLCOLORS("3", "9", "1;"),}, 100 { ALLCOLORS("4", "10", ""), ALLCOLORS("4", "10", "1;")} 101 }; 102 // clang-format on 103 104 // A CMake option controls wheter we emit core dumps by default. An application 105 // may disable core dumps by calling Process::PreventCoreFiles(). 106 static bool coreFilesPrevented = !LLVM_ENABLE_CRASH_DUMPS; 107 108 bool Process::AreCoreFilesPrevented() { return coreFilesPrevented; } 109 110 [[noreturn]] void Process::Exit(int RetCode, bool NoCleanup) { 111 if (CrashRecoveryContext *CRC = CrashRecoveryContext::GetCurrent()) 112 CRC->HandleExit(RetCode); 113 114 if (NoCleanup) 115 ExitNoCleanup(RetCode); 116 else 117 ::exit(RetCode); 118 } 119 120 // Include the platform-specific parts of this class. 121 #ifdef LLVM_ON_UNIX 122 #include "Unix/Process.inc" 123 #endif 124 #ifdef _WIN32 125 #include "Windows/Process.inc" 126 #endif 127