LLVM  10.0.0svn
Process.cpp
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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"
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 
31  StringRef FileName) {
32  return FindInEnvPath(EnvName, FileName, {});
33 }
34 
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'};
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 
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
This class represents lattice values for constants.
Definition: AllocatorList.h:23
static bool AreCoreFilesPrevented()
true if PreventCoreFiles has been called, false otherwise.
Definition: Process.cpp:89
const char EnvPathSeparator
This is the OS-specific separator for PATH like environment variables:
Definition: Program.h:29
void append(SmallVectorImpl< char > &path, const Twine &a, const Twine &b="", const Twine &c="", const Twine &d="")
Append to path.
Definition: Path.cpp:455
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:80
bool is_absolute(const Twine &path, Style style=Style::native)
Is path absolute?
Definition: Path.cpp:663
static const char colorcodes[2][2][8][10]
Definition: Process.cpp:80
void SplitString(StringRef Source, SmallVectorImpl< StringRef > &OutFragments, StringRef Delimiters=" \\\)
SplitString - Split up the specified string according to the specified delimiters, appending the result fragments to the output list.
StringRef str() const
Explicit conversion to StringRef.
Definition: SmallString.h:266
const T & getValue() const LLVM_LVALUE_FUNCTION
Definition: Optional.h:255
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory)...
Definition: APInt.h:32
static bool coreFilesPrevented
Definition: Process.cpp:87
bool any_of(R &&range, UnaryPredicate P)
Provide wrappers to std::any_of which take ranges instead of having to pass begin/end explicitly...
Definition: STLExtras.h:1199
static Optional< std::string > FindInEnvPath(StringRef EnvName, StringRef FileName, ArrayRef< std::string > IgnoreList)
This function searches for an existing file in the list of directories in a PATH like environment var...
Definition: Process.cpp:35
This is a &#39;vector&#39; (really, a variable-sized array), optimized for the case when the array is small...
Definition: SmallVector.h:837
bool hasValue() const
Definition: Optional.h:259
Provides a library for accessing information about this process and other processes on the operating ...
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
bool equivalent(file_status A, file_status B)
Do file_status&#39;s represent the same thing?
#define ALLCOLORS(FGBG, BOLD)
Definition: Process.cpp:69
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
bool exists(const basic_file_status &status)
Does file exist?
Definition: Path.cpp:1025
static Optional< std::string > GetEnv(StringRef name)