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