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1 //===-- tsan_flags.cc -----------------------------------------------------===//
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2 //
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3 // This file is distributed under the University of Illinois Open Source
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4 // License. See LICENSE.TXT for details.
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5 //
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6 //===----------------------------------------------------------------------===//
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7 //
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8 // This file is a part of ThreadSanitizer (TSan), a race detector.
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9 //
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10 //===----------------------------------------------------------------------===//
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11
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12 #include "sanitizer_common/sanitizer_flags.h"
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13 #include "sanitizer_common/sanitizer_flag_parser.h"
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14 #include "sanitizer_common/sanitizer_libc.h"
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15 #include "tsan_flags.h"
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16 #include "tsan_rtl.h"
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17 #include "tsan_mman.h"
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18 #include "ubsan/ubsan_flags.h"
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19
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20 namespace __tsan {
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21
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22 // Can be overriden in frontend.
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23 #ifdef TSAN_EXTERNAL_HOOKS
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24 extern "C" const char* __tsan_default_options();
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25 #else
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26 SANITIZER_WEAK_DEFAULT_IMPL
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27 const char *__tsan_default_options() {
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28 return "";
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29 }
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30 #endif
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31
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32 void Flags::SetDefaults() {
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33 #define TSAN_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
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34 #include "tsan_flags.inc"
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35 #undef TSAN_FLAG
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36 // DDFlags
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37 second_deadlock_stack = false;
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38 }
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39
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40 void RegisterTsanFlags(FlagParser *parser, Flags *f) {
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41 #define TSAN_FLAG(Type, Name, DefaultValue, Description) \
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42 RegisterFlag(parser, #Name, Description, &f->Name);
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43 #include "tsan_flags.inc"
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44 #undef TSAN_FLAG
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45 // DDFlags
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46 RegisterFlag(parser, "second_deadlock_stack",
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47 "Report where each mutex is locked in deadlock reports",
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48 &f->second_deadlock_stack);
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49 }
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50
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51 void InitializeFlags(Flags *f, const char *env) {
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52 SetCommonFlagsDefaults();
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53 {
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54 // Override some common flags defaults.
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55 CommonFlags cf;
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56 cf.CopyFrom(*common_flags());
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57 cf.allow_addr2line = true;
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58 if (SANITIZER_GO) {
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59 // Does not work as expected for Go: runtime handles SIGABRT and crashes.
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60 cf.abort_on_error = false;
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61 // Go does not have mutexes.
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62 } else {
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63 cf.detect_deadlocks = true;
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64 }
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65 cf.print_suppressions = false;
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66 cf.stack_trace_format = " #%n %f %S %M";
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67 cf.exitcode = 66;
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68 cf.intercept_tls_get_addr = true;
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69 OverrideCommonFlags(cf);
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70 }
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71
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72 f->SetDefaults();
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73
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74 FlagParser parser;
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75 RegisterTsanFlags(&parser, f);
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76 RegisterCommonFlags(&parser);
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77
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78 #if TSAN_CONTAINS_UBSAN
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79 __ubsan::Flags *uf = __ubsan::flags();
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80 uf->SetDefaults();
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81
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82 FlagParser ubsan_parser;
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83 __ubsan::RegisterUbsanFlags(&ubsan_parser, uf);
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84 RegisterCommonFlags(&ubsan_parser);
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85 #endif
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86
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87 // Let a frontend override.
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88 parser.ParseString(__tsan_default_options());
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89 #if TSAN_CONTAINS_UBSAN
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90 const char *ubsan_default_options = __ubsan::MaybeCallUbsanDefaultOptions();
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91 ubsan_parser.ParseString(ubsan_default_options);
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92 #endif
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93 // Override from command line.
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94 parser.ParseString(env);
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95 #if TSAN_CONTAINS_UBSAN
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96 ubsan_parser.ParseString(GetEnv("UBSAN_OPTIONS"));
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97 #endif
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98
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99 // Sanity check.
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100 if (!f->report_bugs) {
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101 f->report_thread_leaks = false;
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102 f->report_destroy_locked = false;
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103 f->report_signal_unsafe = false;
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104 }
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105
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106 InitializeCommonFlags();
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107
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108 if (Verbosity()) ReportUnrecognizedFlags();
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109
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110 if (common_flags()->help) parser.PrintFlagDescriptions();
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111
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112 if (f->history_size < 0 || f->history_size > 7) {
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113 Printf("ThreadSanitizer: incorrect value for history_size"
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114 " (must be [0..7])\n");
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115 Die();
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116 }
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117
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118 if (f->io_sync < 0 || f->io_sync > 2) {
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119 Printf("ThreadSanitizer: incorrect value for io_sync"
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120 " (must be [0..2])\n");
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121 Die();
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122 }
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123 }
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124
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125 } // namespace __tsan
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