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1 | //===-- Process.cpp - Implement OS Process Concept --------------*- C++ -*-===// |
2 | // | |
3 | // The LLVM Compiler Infrastructure | |
4 | // | |
5 | // This file is distributed under the University of Illinois Open Source | |
6 | // License. See LICENSE.TXT for details. | |
7 | // | |
8 | //===----------------------------------------------------------------------===// | |
9 | // | |
1a4d82fc | 10 | // This file implements the operating system Process concept. |
223e47cc LB |
11 | // |
12 | //===----------------------------------------------------------------------===// | |
13 | ||
1a4d82fc | 14 | #include "llvm/ADT/StringExtras.h" |
223e47cc | 15 | #include "llvm/Config/config.h" |
970d7e83 | 16 | #include "llvm/Support/ErrorHandling.h" |
1a4d82fc | 17 | #include "llvm/Support/FileSystem.h" |
970d7e83 | 18 | #include "llvm/Support/Process.h" |
1a4d82fc | 19 | #include "llvm/Support/Program.h" |
223e47cc | 20 | |
970d7e83 | 21 | using namespace llvm; |
223e47cc LB |
22 | using namespace sys; |
23 | ||
24 | //===----------------------------------------------------------------------===// | |
25 | //=== WARNING: Implementation here must contain only TRULY operating system | |
26 | //=== independent code. | |
27 | //===----------------------------------------------------------------------===// | |
28 | ||
970d7e83 LB |
29 | /// \brief A helper function to compute the elapsed wall-time since the program |
30 | /// started. | |
31 | /// | |
32 | /// Note that this routine actually computes the elapsed wall time since the | |
33 | /// first time it was called. However, we arrange to have it called during the | |
34 | /// startup of the process to get approximately correct results. | |
35 | static TimeValue getElapsedWallTime() { | |
36 | static TimeValue &StartTime = *new TimeValue(TimeValue::now()); | |
37 | return TimeValue::now() - StartTime; | |
38 | } | |
39 | ||
40 | /// \brief A special global variable to ensure we call \c getElapsedWallTime | |
41 | /// during global initialization of the program. | |
42 | /// | |
43 | /// Note that this variable is never referenced elsewhere. Doing so could | |
44 | /// create race conditions during program startup or shutdown. | |
45 | static volatile TimeValue DummyTimeValue = getElapsedWallTime(); | |
46 | ||
1a4d82fc JJ |
47 | Optional<std::string> Process::FindInEnvPath(const std::string& EnvName, |
48 | const std::string& FileName) | |
49 | { | |
50 | Optional<std::string> FoundPath; | |
51 | Optional<std::string> OptPath = Process::GetEnv(EnvName); | |
52 | if (!OptPath.hasValue()) | |
53 | return FoundPath; | |
970d7e83 | 54 | |
1a4d82fc JJ |
55 | const char EnvPathSeparatorStr[] = {EnvPathSeparator, '\0'}; |
56 | SmallVector<StringRef, 8> Dirs; | |
57 | SplitString(OptPath.getValue(), Dirs, EnvPathSeparatorStr); | |
58 | ||
59 | for (const auto &Dir : Dirs) { | |
60 | if (Dir.empty()) | |
61 | continue; | |
62 | ||
63 | SmallString<128> FilePath(Dir); | |
64 | path::append(FilePath, FileName); | |
65 | if (fs::exists(Twine(FilePath))) { | |
66 | FoundPath = FilePath.str(); | |
67 | break; | |
68 | } | |
69 | } | |
70 | ||
71 | return FoundPath; | |
72 | } | |
73 | ||
74 | ||
75 | #define COLOR(FGBG, CODE, BOLD) "\033[0;" BOLD FGBG CODE "m" | |
76 | ||
77 | #define ALLCOLORS(FGBG,BOLD) {\ | |
78 | COLOR(FGBG, "0", BOLD),\ | |
79 | COLOR(FGBG, "1", BOLD),\ | |
80 | COLOR(FGBG, "2", BOLD),\ | |
81 | COLOR(FGBG, "3", BOLD),\ | |
82 | COLOR(FGBG, "4", BOLD),\ | |
83 | COLOR(FGBG, "5", BOLD),\ | |
84 | COLOR(FGBG, "6", BOLD),\ | |
85 | COLOR(FGBG, "7", BOLD)\ | |
86 | } | |
970d7e83 | 87 | |
1a4d82fc JJ |
88 | static const char colorcodes[2][2][8][10] = { |
89 | { ALLCOLORS("3",""), ALLCOLORS("3","1;") }, | |
90 | { ALLCOLORS("4",""), ALLCOLORS("4","1;") } | |
91 | }; | |
970d7e83 | 92 | |
223e47cc LB |
93 | // Include the platform-specific parts of this class. |
94 | #ifdef LLVM_ON_UNIX | |
95 | #include "Unix/Process.inc" | |
96 | #endif | |
97 | #ifdef LLVM_ON_WIN32 | |
98 | #include "Windows/Process.inc" | |
99 | #endif |