1 files changed, 97 insertions, 0 deletions
diff --git a/llvm/lib/Support/Process.cpp b/llvm/lib/Support/Process.cpp
new file mode 100644
index 0000000000000..5b64710081597
--- /dev/null
+++ b/llvm/lib/Support/Process.cpp
@@ -0,0 +1,97 @@
+//===-- Process.cpp - Implement OS Process Concept --------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file implements the operating system Process concept.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/Process.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Config/llvm-config.h"
+#include "llvm/Config/config.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/Program.h"
+
+using namespace llvm;
+using namespace sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only TRULY operating system
+//===          independent code.
+//===----------------------------------------------------------------------===//
+
+Optional<std::string> Process::FindInEnvPath(StringRef EnvName,
+                                             StringRef FileName) {
+  return FindInEnvPath(EnvName, FileName, {});
+}
+
+Optional<std::string> Process::FindInEnvPath(StringRef EnvName,
+                                             StringRef FileName,
+                                             ArrayRef<std::string> IgnoreList) {
+  assert(!path::is_absolute(FileName));
+  Optional<std::string> FoundPath;
+  Optional<std::string> OptPath = Process::GetEnv(EnvName);
+  if (!OptPath.hasValue())
+    return FoundPath;
+
+  const char EnvPathSeparatorStr[] = {EnvPathSeparator, '\0'};
+  SmallVector<StringRef, 8> Dirs;
+  SplitString(OptPath.getValue(), Dirs, EnvPathSeparatorStr);
+
+  for (StringRef Dir : Dirs) {
+    if (Dir.empty())
+      continue;
+
+    if (any_of(IgnoreList, [&](StringRef S) { return fs::equivalent(S, Dir); }))
+      continue;
+
+    SmallString<128> FilePath(Dir);
+    path::append(FilePath, FileName);
+    if (fs::exists(Twine(FilePath))) {
+      FoundPath = FilePath.str();
+      break;
+    }
+  }
+
+  return FoundPath;
+}
+
+
+#define COLOR(FGBG, CODE, BOLD) "\033[0;" BOLD FGBG CODE "m"
+
+#define ALLCOLORS(FGBG,BOLD) {\
+    COLOR(FGBG, "0", BOLD),\
+    COLOR(FGBG, "1", BOLD),\
+    COLOR(FGBG, "2", BOLD),\
+    COLOR(FGBG, "3", BOLD),\
+    COLOR(FGBG, "4", BOLD),\
+    COLOR(FGBG, "5", BOLD),\
+    COLOR(FGBG, "6", BOLD),\
+    COLOR(FGBG, "7", BOLD)\
+  }
+
+static const char colorcodes[2][2][8][10] = {
+ { ALLCOLORS("3",""), ALLCOLORS("3","1;") },
+ { ALLCOLORS("4",""), ALLCOLORS("4","1;") }
+};
+
+// A CMake option controls wheter we emit core dumps by default. An application
+// may disable core dumps by calling Process::PreventCoreFiles().
+static bool coreFilesPrevented = !LLVM_ENABLE_CRASH_DUMPS;
+
+bool Process::AreCoreFilesPrevented() { return coreFilesPrevented; }
+
+// Include the platform-specific parts of this class.
+#ifdef LLVM_ON_UNIX
+#include "Unix/Process.inc"
+#endif
+#ifdef _WIN32
+#include "Windows/Process.inc"
+#endif