76 lines · cpp
1//===-- nsan_flags.cc -----------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file is a part of NumericalStabilitySanitizer.10//11//===----------------------------------------------------------------------===//12 13#include "nsan_flags.h"14 15#include "sanitizer_common/sanitizer_flag_parser.h"16#include "sanitizer_common/sanitizer_flags.h"17 18using namespace __sanitizer;19using namespace __nsan;20 21SANITIZER_INTERFACE_WEAK_DEF(const char *, __nsan_default_options, void) {22 return "";23}24 25Flags __nsan::flags_data;26 27void Flags::SetDefaults() {28#define NSAN_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;29#include "nsan_flags.inc"30#undef NSAN_FLAG31}32 33void Flags::PopulateCache() {34 cached_absolute_error_threshold =35 1.0 / (1ull << log2_absolute_error_threshold);36}37 38static void RegisterNSanFlags(FlagParser *parser, Flags *f) {39#define NSAN_FLAG(Type, Name, DefaultValue, Description) \40 RegisterFlag(parser, #Name, Description, &f->Name);41#include "nsan_flags.inc"42#undef NSAN_FLAG43}44 45static const char *MaybeCallNsanDefaultOptions() {46 return (&__nsan_default_options) ? __nsan_default_options() : "";47}48 49void __nsan::InitializeFlags() {50 SetCommonFlagsDefaults();51 {52 CommonFlags cf;53 cf.CopyFrom(*common_flags());54 cf.external_symbolizer_path = GetEnv("NSAN_SYMBOLIZER_PATH");55 OverrideCommonFlags(cf);56 }57 58 flags().SetDefaults();59 60 FlagParser parser;61 RegisterCommonFlags(&parser);62 RegisterNSanFlags(&parser, &flags());63 64 const char *nsan_default_options = MaybeCallNsanDefaultOptions();65 parser.ParseString(nsan_default_options);66 67 parser.ParseString(GetEnv("NSAN_OPTIONS"));68 InitializeCommonFlags();69 if (Verbosity())70 ReportUnrecognizedFlags();71 if (common_flags()->help)72 parser.PrintFlagDescriptions();73 74 flags().PopulateCache();75}76