embed LLD 5.0.0

This is 48aaa9f66120f72b5d7e4a90b32fee40a3386ce9 from the
git monorepo.

1 files changed, 114 insertions, 0 deletions

diff --git a/deps/lld/COFF/Error.cpp b/deps/lld/COFF/Error.cpp
new file mode 100644
index 0000000000..34abc280f6
--- /dev/null
+++ b/deps/lld/COFF/Error.cpp
@@ -0,0 +1,114 @@
+//===- Error.cpp ----------------------------------------------------------===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Error.h"
+#include "Config.h"
+
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Process.h"
+#include "llvm/Support/raw_ostream.h"
+#include <mutex>
+
+#if !defined(_MSC_VER) && !defined(__MINGW32__)
+#include <unistd.h>
+#endif
+
+using namespace llvm;
+
+namespace lld {
+// The functions defined in this file can be called from multiple threads,
+// but outs() or errs() are not thread-safe. We protect them using a mutex.
+static std::mutex Mu;
+
+namespace coff {
+uint64_t ErrorCount;
+raw_ostream *ErrorOS;
+
+static LLVM_ATTRIBUTE_NORETURN void exitLld(int Val) {
+  // Dealloc/destroy ManagedStatic variables before calling
+  // _exit(). In a non-LTO build, this is a nop. In an LTO
+  // build allows us to get the output of -time-passes.
+  llvm_shutdown();
+
+  outs().flush();
+  errs().flush();
+  _exit(Val);
+}
+
+static void print(StringRef S, raw_ostream::Colors C) {
+  *ErrorOS << Config->Argv[0] << ": ";
+  if (Config->ColorDiagnostics) {
+    ErrorOS->changeColor(C, true);
+    *ErrorOS << S;
+    ErrorOS->resetColor();
+  } else {
+    *ErrorOS << S;
+  }
+}
+
+void log(const Twine &Msg) {
+  if (Config->Verbose) {
+    std::lock_guard<std::mutex> Lock(Mu);
+    outs() << Config->Argv[0] << ": " << Msg << "\n";
+    outs().flush();
+  }
+}
+
+void message(const Twine &Msg) {
+  std::lock_guard<std::mutex> Lock(Mu);
+  outs() << Msg << "\n";
+  outs().flush();
+}
+
+void error(const Twine &Msg) {
+  std::lock_guard<std::mutex> Lock(Mu);
+
+  if (Config->ErrorLimit == 0 || ErrorCount < Config->ErrorLimit) {
+    print("error: ", raw_ostream::RED);
+    *ErrorOS << Msg << "\n";
+  } else if (ErrorCount == Config->ErrorLimit) {
+    print("error: ", raw_ostream::RED);
+    *ErrorOS << "too many errors emitted, stopping now"
+             << " (use /ERRORLIMIT:0 to see all errors)\n";
+    exitLld(1);
+  }
+
+  ++ErrorCount;
+}
+
+void fatal(const Twine &Msg) {
+  if (Config->ColorDiagnostics) {
+    errs().changeColor(raw_ostream::RED, /*bold=*/true);
+    errs() << "error: ";
+    errs().resetColor();
+  } else {
+    errs() << "error: ";
+  }
+  errs() << Msg << "\n";
+  exitLld(1);
+}
+
+void fatal(std::error_code EC, const Twine &Msg) {
+  fatal(Msg + ": " + EC.message());
+}
+
+void fatal(llvm::Error &Err, const Twine &Msg) {
+  fatal(errorToErrorCode(std::move(Err)), Msg);
+}
+
+void warn(const Twine &Msg) {
+  std::lock_guard<std::mutex> Lock(Mu);
+  print("warning: ", raw_ostream::MAGENTA);
+  *ErrorOS << Msg << "\n";
+}
+
+} // namespace coff
+} // namespace lld