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 //
10 // This file implements the operating system Process concept.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "llvm/ADT/StringExtras.h"
15 #include "llvm/Config/config.h"
16 #include "llvm/Support/FileSystem.h"
17 #include "llvm/Support/Path.h"
18 #include "llvm/Support/Process.h"
19 #include "llvm/Support/Program.h"
20
21 using namespace llvm;
22 using namespace sys;
23
24 //===----------------------------------------------------------------------===//
25 //=== WARNING: Implementation here must contain only TRULY operating system
26 //=== independent code.
27 //===----------------------------------------------------------------------===//
28
FindInEnvPath(const std::string & EnvName,const std::string & FileName)29 Optional<std::string> Process::FindInEnvPath(const std::string& EnvName,
30 const std::string& FileName)
31 {
32 assert(!path::is_absolute(FileName));
33 Optional<std::string> FoundPath;
34 Optional<std::string> OptPath = Process::GetEnv(EnvName);
35 if (!OptPath.hasValue())
36 return FoundPath;
37
38 const char EnvPathSeparatorStr[] = {EnvPathSeparator, '\0'};
39 SmallVector<StringRef, 8> Dirs;
40 SplitString(OptPath.getValue(), Dirs, EnvPathSeparatorStr);
41
42 for (const auto &Dir : Dirs) {
43 if (Dir.empty())
44 continue;
45
46 SmallString<128> FilePath(Dir);
47 path::append(FilePath, FileName);
48 if (fs::exists(Twine(FilePath))) {
49 FoundPath = FilePath.str();
50 break;
51 }
52 }
53
54 return FoundPath;
55 }
56
57
58 #define COLOR(FGBG, CODE, BOLD) "\033[0;" BOLD FGBG CODE "m"
59
60 #define ALLCOLORS(FGBG,BOLD) {\
61 COLOR(FGBG, "0", BOLD),\
62 COLOR(FGBG, "1", BOLD),\
63 COLOR(FGBG, "2", BOLD),\
64 COLOR(FGBG, "3", BOLD),\
65 COLOR(FGBG, "4", BOLD),\
66 COLOR(FGBG, "5", BOLD),\
67 COLOR(FGBG, "6", BOLD),\
68 COLOR(FGBG, "7", BOLD)\
69 }
70
71 static const char colorcodes[2][2][8][10] = {
72 { ALLCOLORS("3",""), ALLCOLORS("3","1;") },
73 { ALLCOLORS("4",""), ALLCOLORS("4","1;") }
74 };
75
76 // This is set to true when Process::PreventCoreFiles() is called.
77 static bool coreFilesPrevented = false;
78
AreCoreFilesPrevented()79 bool Process::AreCoreFilesPrevented() {
80 return coreFilesPrevented;
81 }
82
83 // Include the platform-specific parts of this class.
84 #ifdef LLVM_ON_UNIX
85 #include "Unix/Process.inc"
86 #endif
87 #ifdef LLVM_ON_WIN32
88 #include "Windows/Process.inc"
89 #endif
90