contrib/llvm/lib/Support/Process.cpp

   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/Support/Process.h"
  15 #include "llvm/ADT/STLExtras.h"
  16 #include "llvm/ADT/StringExtras.h"
  17 #include "llvm/Config/llvm-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 // This is set to true when Process::PreventCoreFiles() is called.
  86 static bool coreFilesPrevented = false;
  87
  88 bool Process::AreCoreFilesPrevented() {
  89   return coreFilesPrevented;
  90 }
  91
  92 // Include the platform-specific parts of this class.
  93 #ifdef LLVM_ON_UNIX
  94 #include "Unix/Process.inc"
  95 #endif
  96 #ifdef _WIN32
  97 #include "Windows/Process.inc"
  98 #endif