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-rw-r--r--lib/ubsan/ubsan_flags.cpp84
1 files changed, 84 insertions, 0 deletions
diff --git a/lib/ubsan/ubsan_flags.cpp b/lib/ubsan/ubsan_flags.cpp
new file mode 100644
index 000000000000..721c2273f133
--- /dev/null
+++ b/lib/ubsan/ubsan_flags.cpp
@@ -0,0 +1,84 @@
+//===-- ubsan_flags.cpp ---------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// Runtime flags for UndefinedBehaviorSanitizer.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ubsan_platform.h"
+#if CAN_SANITIZE_UB
+#include "ubsan_flags.h"
+#include "sanitizer_common/sanitizer_common.h"
+#include "sanitizer_common/sanitizer_flags.h"
+#include "sanitizer_common/sanitizer_flag_parser.h"
+
+#include <stdlib.h>
+
+namespace __ubsan {
+
+const char *MaybeCallUbsanDefaultOptions() {
+ return (&__ubsan_default_options) ? __ubsan_default_options() : "";
+}
+
+static const char *GetFlag(const char *flag) {
+ // We cannot call getenv() from inside a preinit array initializer
+ if (SANITIZER_CAN_USE_PREINIT_ARRAY) {
+ return GetEnv(flag);
+ } else {
+ return getenv(flag);
+ }
+}
+
+Flags ubsan_flags;
+
+void Flags::SetDefaults() {
+#define UBSAN_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
+#include "ubsan_flags.inc"
+#undef UBSAN_FLAG
+}
+
+void RegisterUbsanFlags(FlagParser *parser, Flags *f) {
+#define UBSAN_FLAG(Type, Name, DefaultValue, Description) \
+ RegisterFlag(parser, #Name, Description, &f->Name);
+#include "ubsan_flags.inc"
+#undef UBSAN_FLAG
+}
+
+void InitializeFlags() {
+ SetCommonFlagsDefaults();
+ {
+ CommonFlags cf;
+ cf.CopyFrom(*common_flags());
+ cf.external_symbolizer_path = GetFlag("UBSAN_SYMBOLIZER_PATH");
+ OverrideCommonFlags(cf);
+ }
+
+ Flags *f = flags();
+ f->SetDefaults();
+
+ FlagParser parser;
+ RegisterCommonFlags(&parser);
+ RegisterUbsanFlags(&parser, f);
+
+ // Override from user-specified string.
+ parser.ParseString(MaybeCallUbsanDefaultOptions());
+ // Override from environment variable.
+ parser.ParseStringFromEnv("UBSAN_OPTIONS");
+ InitializeCommonFlags();
+ if (Verbosity()) ReportUnrecognizedFlags();
+
+ if (common_flags()->help) parser.PrintFlagDescriptions();
+}
+
+} // namespace __ubsan
+
+SANITIZER_INTERFACE_WEAK_DEF(const char *, __ubsan_default_options, void) {
+ return "";
+}
+
+#endif // CAN_SANITIZE_UB