1 //===-- tsan_flags.cc -----------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file is a part of ThreadSanitizer (TSan), a race detector. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "sanitizer_common/sanitizer_flags.h" 15 #include "sanitizer_common/sanitizer_flag_parser.h" 16 #include "sanitizer_common/sanitizer_libc.h" 17 #include "tsan_flags.h" 18 #include "tsan_rtl.h" 19 #include "tsan_mman.h" 20 #include "ubsan/ubsan_flags.h" 21 22 namespace __tsan { 23 24 Flags *flags() { 25 return &ctx->flags; 26 } 27 28 // Can be overriden in frontend. 29 #ifdef TSAN_EXTERNAL_HOOKS 30 extern "C" const char* __tsan_default_options(); 31 #else 32 SANITIZER_WEAK_DEFAULT_IMPL 33 const char *__tsan_default_options() { 34 return ""; 35 } 36 #endif 37 38 void Flags::SetDefaults() { 39 #define TSAN_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue; 40 #include "tsan_flags.inc" 41 #undef TSAN_FLAG 42 // DDFlags 43 second_deadlock_stack = false; 44 } 45 46 void RegisterTsanFlags(FlagParser *parser, Flags *f) { 47 #define TSAN_FLAG(Type, Name, DefaultValue, Description) \ 48 RegisterFlag(parser, #Name, Description, &f->Name); 49 #include "tsan_flags.inc" 50 #undef TSAN_FLAG 51 // DDFlags 52 RegisterFlag(parser, "second_deadlock_stack", 53 "Report where each mutex is locked in deadlock reports", 54 &f->second_deadlock_stack); 55 } 56 57 void InitializeFlags(Flags *f, const char *env) { 58 SetCommonFlagsDefaults(); 59 { 60 // Override some common flags defaults. 61 CommonFlags cf; 62 cf.CopyFrom(*common_flags()); 63 cf.allow_addr2line = true; 64 if (kGoMode) { 65 // Does not work as expected for Go: runtime handles SIGABRT and crashes. 66 cf.abort_on_error = false; 67 // Go does not have mutexes. 68 } else { 69 cf.detect_deadlocks = true; 70 } 71 cf.print_suppressions = false; 72 cf.stack_trace_format = " #%n %f %S %M"; 73 cf.exitcode = 66; 74 OverrideCommonFlags(cf); 75 } 76 77 f->SetDefaults(); 78 79 FlagParser parser; 80 RegisterTsanFlags(&parser, f); 81 RegisterCommonFlags(&parser); 82 83 #if TSAN_CONTAINS_UBSAN 84 __ubsan::Flags *uf = __ubsan::flags(); 85 uf->SetDefaults(); 86 87 FlagParser ubsan_parser; 88 __ubsan::RegisterUbsanFlags(&ubsan_parser, uf); 89 RegisterCommonFlags(&ubsan_parser); 90 #endif 91 92 // Let a frontend override. 93 parser.ParseString(__tsan_default_options()); 94 #if TSAN_CONTAINS_UBSAN 95 const char *ubsan_default_options = __ubsan::MaybeCallUbsanDefaultOptions(); 96 ubsan_parser.ParseString(ubsan_default_options); 97 #endif 98 // Override from command line. 99 parser.ParseString(env); 100 #if TSAN_CONTAINS_UBSAN 101 ubsan_parser.ParseString(GetEnv("UBSAN_OPTIONS")); 102 #endif 103 104 // Sanity check. 105 if (!f->report_bugs) { 106 f->report_thread_leaks = false; 107 f->report_destroy_locked = false; 108 f->report_signal_unsafe = false; 109 } 110 111 SetVerbosity(common_flags()->verbosity); 112 113 if (Verbosity()) ReportUnrecognizedFlags(); 114 115 if (common_flags()->help) parser.PrintFlagDescriptions(); 116 117 if (f->history_size < 0 || f->history_size > 7) { 118 Printf("ThreadSanitizer: incorrect value for history_size" 119 " (must be [0..7])\n"); 120 Die(); 121 } 122 123 if (f->io_sync < 0 || f->io_sync > 2) { 124 Printf("ThreadSanitizer: incorrect value for io_sync" 125 " (must be [0..2])\n"); 126 Die(); 127 } 128 } 129 130 } // namespace __tsan 131
