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/config.h"
17#include "llvm/Config/llvm-config.h"
18#include "llvm/Support/CrashRecoveryContext.h"
19#include "llvm/Support/FileSystem.h"
20#include "llvm/Support/Path.h"
21#include "llvm/Support/Program.h"
22
23#include <optional>
24#include <stdlib.h> // for _Exit
25
26using namespace llvm;
27using namespace sys;
28
29//===----------------------------------------------------------------------===//
30//=== WARNING: Implementation here must contain only TRULY operating system
31//=== independent code.
32//===----------------------------------------------------------------------===//
33
34std::optional<std::string>
35Process::FindInEnvPath(StringRef EnvName, StringRef FileName, char Separator) {
36 return FindInEnvPath(EnvName, FileName, IgnoreList: {}, Separator);
37}
38
39std::optional<std::string>
40Process::FindInEnvPath(StringRef EnvName, StringRef FileName,
41 ArrayRef<std::string> IgnoreList, char Separator) {
42 assert(!path::is_absolute(FileName));
43 std::optional<std::string> FoundPath;
44 std::optional<std::string> OptPath = Process::GetEnv(name: EnvName);
45 if (!OptPath)
46 return FoundPath;
47
48 const char EnvPathSeparatorStr[] = {Separator, '\0'};
49 SmallVector<StringRef, 8> Dirs;
50 SplitString(Source: *OptPath, OutFragments&: Dirs, Delimiters: EnvPathSeparatorStr);
51
52 for (StringRef Dir : Dirs) {
53 if (Dir.empty())
54 continue;
55
56 if (any_of(Range&: IgnoreList, P: [&](StringRef S) { return fs::equivalent(A: S, B: Dir); }))
57 continue;
58
59 SmallString<128> FilePath(Dir);
60 path::append(path&: FilePath, a: FileName);
61 if (fs::exists(Path: Twine(FilePath))) {
62 FoundPath = std::string(FilePath);
63 break;
64 }
65 }
66
67 return FoundPath;
68}
69
70// clang-format off
71#define COLOR(FGBG, CODE, BOLD) "\033[0;" BOLD FGBG CODE "m"
72
73#define ALLCOLORS(FGBG, BRIGHT, BOLD) \
74 { \
75 COLOR(FGBG, "0", BOLD), \
76 COLOR(FGBG, "1", BOLD), \
77 COLOR(FGBG, "2", BOLD), \
78 COLOR(FGBG, "3", BOLD), \
79 COLOR(FGBG, "4", BOLD), \
80 COLOR(FGBG, "5", BOLD), \
81 COLOR(FGBG, "6", BOLD), \
82 COLOR(FGBG, "7", BOLD), \
83 COLOR(BRIGHT, "0", BOLD), \
84 COLOR(BRIGHT, "1", BOLD), \
85 COLOR(BRIGHT, "2", BOLD), \
86 COLOR(BRIGHT, "3", BOLD), \
87 COLOR(BRIGHT, "4", BOLD), \
88 COLOR(BRIGHT, "5", BOLD), \
89 COLOR(BRIGHT, "6", BOLD), \
90 COLOR(BRIGHT, "7", BOLD), \
91 }
92
93// bg
94// | bold
95// | |
96// | | codes
97// | | |
98// | | |
99static const char colorcodes[2][2][16][11] = {
100 { ALLCOLORS("3", "9", ""), ALLCOLORS("3", "9", "1;"),},
101 { ALLCOLORS("4", "10", ""), ALLCOLORS("4", "10", "1;")}
102};
103// clang-format on
104
105// A CMake option controls wheter we emit core dumps by default. An application
106// may disable core dumps by calling Process::PreventCoreFiles().
107static bool coreFilesPrevented = !LLVM_ENABLE_CRASH_DUMPS;
108
109bool Process::AreCoreFilesPrevented() { return coreFilesPrevented; }
110
111[[noreturn]] void Process::Exit(int RetCode, bool NoCleanup) {
112 if (CrashRecoveryContext *CRC = CrashRecoveryContext::GetCurrent())
113 CRC->HandleExit(RetCode);
114
115 if (NoCleanup)
116 ExitNoCleanup(RetCode);
117 else
118 ::exit(status: RetCode);
119}
120
121// Include the platform-specific parts of this class.
122#ifdef LLVM_ON_UNIX
123#include "Unix/Process.inc"
124#endif
125#ifdef _WIN32
126#include "Windows/Process.inc"
127#endif
128

source code of llvm/lib/Support/Process.cpp