1 files changed, 103 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/Support/Program.cpp b/contrib/llvm-project/llvm/lib/Support/Program.cpp
new file mode 100644
index 000000000000..5294f65bd5a5
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/Support/Program.cpp
@@ -0,0 +1,103 @@
+//===-- Program.cpp - Implement OS Program 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 Program concept.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/Program.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Config/llvm-config.h"
+#include "llvm/Support/raw_ostream.h"
+#include <system_error>
+using namespace llvm;
+using namespace sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only TRULY operating system
+//===          independent code.
+//===----------------------------------------------------------------------===//
+
+static bool Execute(ProcessInfo &PI, StringRef Program,
+                    ArrayRef<StringRef> Args, Optional<ArrayRef<StringRef>> Env,
+                    ArrayRef<Optional<StringRef>> Redirects,
+                    unsigned MemoryLimit, std::string *ErrMsg);
+
+int sys::ExecuteAndWait(StringRef Program, ArrayRef<StringRef> Args,
+                        Optional<ArrayRef<StringRef>> Env,
+                        ArrayRef<Optional<StringRef>> Redirects,
+                        unsigned SecondsToWait, unsigned MemoryLimit,
+                        std::string *ErrMsg, bool *ExecutionFailed,
+                        Optional<ProcessStatistics> *ProcStat) {
+  assert(Redirects.empty() || Redirects.size() == 3);
+  ProcessInfo PI;
+  if (Execute(PI, Program, Args, Env, Redirects, MemoryLimit, ErrMsg)) {
+    if (ExecutionFailed)
+      *ExecutionFailed = false;
+    ProcessInfo Result =
+        Wait(PI, SecondsToWait, /*WaitUntilTerminates=*/SecondsToWait == 0,
+             ErrMsg, ProcStat);
+    return Result.ReturnCode;
+  }
+
+  if (ExecutionFailed)
+    *ExecutionFailed = true;
+
+  return -1;
+}
+
+ProcessInfo sys::ExecuteNoWait(StringRef Program, ArrayRef<StringRef> Args,
+                               Optional<ArrayRef<StringRef>> Env,
+                               ArrayRef<Optional<StringRef>> Redirects,
+                               unsigned MemoryLimit, std::string *ErrMsg,
+                               bool *ExecutionFailed) {
+  assert(Redirects.empty() || Redirects.size() == 3);
+  ProcessInfo PI;
+  if (ExecutionFailed)
+    *ExecutionFailed = false;
+  if (!Execute(PI, Program, Args, Env, Redirects, MemoryLimit, ErrMsg))
+    if (ExecutionFailed)
+      *ExecutionFailed = true;
+
+  return PI;
+}
+
+bool sys::commandLineFitsWithinSystemLimits(StringRef Program,
+                                            ArrayRef<const char *> Args) {
+  SmallVector<StringRef, 8> StringRefArgs;
+  StringRefArgs.reserve(Args.size());
+  for (const char *A : Args)
+    StringRefArgs.emplace_back(A);
+  return commandLineFitsWithinSystemLimits(Program, StringRefArgs);
+}
+
+void sys::printArg(raw_ostream &OS, StringRef Arg, bool Quote) {
+  const bool Escape = Arg.find_first_of(" \"\\$") != StringRef::npos;
+
+  if (!Quote && !Escape) {
+    OS << Arg;
+    return;
+  }
+
+  // Quote and escape. This isn't really complete, but good enough.
+  OS << '"';
+  for (const auto c : Arg) {
+    if (c == '"' || c == '\\' || c == '$')
+      OS << '\\';
+    OS << c;
+  }
+  OS << '"';
+}
+
+// Include the platform-specific parts of this class.
+#ifdef LLVM_ON_UNIX
+#include "Unix/Program.inc"
+#endif
+#ifdef _WIN32
+#include "Windows/Program.inc"
+#endif