1 files changed, 75 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/nsan/nsan_flags.cpp b/contrib/llvm-project/compiler-rt/lib/nsan/nsan_flags.cpp
new file mode 100644
index 000000000000..94e3a187c8e6
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/nsan/nsan_flags.cpp
@@ -0,0 +1,75 @@
+//===-- nsan_flags.cc -----------------------------------------------------===//
+//
+// 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 is a part of NumericalStabilitySanitizer.
+//
+//===----------------------------------------------------------------------===//
+
+#include "nsan_flags.h"
+
+#include "sanitizer_common/sanitizer_flag_parser.h"
+#include "sanitizer_common/sanitizer_flags.h"
+
+using namespace __sanitizer;
+using namespace __nsan;
+
+SANITIZER_INTERFACE_WEAK_DEF(const char *, __nsan_default_options, void) {
+  return "";
+}
+
+Flags __nsan::flags_data;
+
+void Flags::SetDefaults() {
+#define NSAN_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
+#include "nsan_flags.inc"
+#undef NSAN_FLAG
+}
+
+void Flags::PopulateCache() {
+  cached_absolute_error_threshold =
+      1.0 / (1ull << log2_absolute_error_threshold);
+}
+
+static void RegisterNSanFlags(FlagParser *parser, Flags *f) {
+#define NSAN_FLAG(Type, Name, DefaultValue, Description)                       \
+  RegisterFlag(parser, #Name, Description, &f->Name);
+#include "nsan_flags.inc"
+#undef NSAN_FLAG
+}
+
+static const char *MaybeCallNsanDefaultOptions() {
+  return (&__nsan_default_options) ? __nsan_default_options() : "";
+}
+
+void __nsan::InitializeFlags() {
+  SetCommonFlagsDefaults();
+  {
+    CommonFlags cf;
+    cf.CopyFrom(*common_flags());
+    cf.external_symbolizer_path = GetEnv("NSAN_SYMBOLIZER_PATH");
+    OverrideCommonFlags(cf);
+  }
+
+  flags().SetDefaults();
+
+  FlagParser parser;
+  RegisterCommonFlags(&parser);
+  RegisterNSanFlags(&parser, &flags());
+
+  const char *nsan_default_options = MaybeCallNsanDefaultOptions();
+  parser.ParseString(nsan_default_options);
+
+  parser.ParseString(GetEnv("NSAN_OPTIONS"));
+  InitializeCommonFlags();
+  if (Verbosity())
+    ReportUnrecognizedFlags();
+  if (common_flags()->help)
+    parser.PrintFlagDescriptions();
+
+  flags().PopulateCache();
+}