Imported Upstream version 5.18.0.205

Former-commit-id: 7f59f7e792705db773f1caecdaa823092f4e2927

external/llvm/utils/not/not.cpp

@@ -0,0 +1,62 @@
+//===- not.cpp - The 'not' testing tool -----------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// Usage:
+//   not cmd
+//     Will return true if cmd doesn't crash and returns false.
+//   not --crash cmd
+//     Will return true if cmd crashes (e.g. for testing crash reporting).
+
+#include "llvm/Support/Program.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+int main(int argc, const char **argv) {
+  bool ExpectCrash = false;
+
+  ++argv;
+  --argc;
+
+  if (argc > 0 && StringRef(argv[0]) == "--crash") {
+    ++argv;
+    --argc;
+    ExpectCrash = true;
+  }
+
+  if (argc == 0)
+    return 1;
+
+  auto Program = sys::findProgramByName(argv[0]);
+  if (!Program) {
+    errs() << "Error: Unable to find `" << argv[0]
+           << "' in PATH: " << Program.getError().message() << "\n";
+    return 1;
+  }
+
+  std::string ErrMsg;
+  int Result = sys::ExecuteAndWait(*Program, argv, nullptr, {}, 0, 0, &ErrMsg);
+#ifdef _WIN32
+  // Handle abort() in msvcrt -- It has exit code as 3.  abort(), aka
+  // unreachable, should be recognized as a crash.  However, some binaries use
+  // exit code 3 on non-crash failure paths, so only do this if we expect a
+  // crash.
+  if (ExpectCrash && Result == 3)
+    Result = -3;
+#endif
+  if (Result < 0) {
+    errs() << "Error: " << ErrMsg << "\n";
+    if (ExpectCrash)
+      return 0;
+    return 1;
+  }
+
+  if (ExpectCrash)
+    return 1;
+
+  return Result == 0;
+}