1 //===-- ubsan_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 // Runtime flags for UndefinedBehaviorSanitizer. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "ubsan_platform.h" 15 #if CAN_SANITIZE_UB 16 #include "ubsan_flags.h" 17 #include "sanitizer_common/sanitizer_common.h" 18 #include "sanitizer_common/sanitizer_flags.h" 19 #include "sanitizer_common/sanitizer_flag_parser.h" 20 21 namespace __ubsan { 22 23 const char *MaybeCallUbsanDefaultOptions() { 24 return (&__ubsan_default_options) ? __ubsan_default_options() : ""; 25 } 26 27 Flags ubsan_flags; 28 29 void Flags::SetDefaults() { 30 #define UBSAN_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue; 31 #include "ubsan_flags.inc" 32 #undef UBSAN_FLAG 33 } 34 35 void RegisterUbsanFlags(FlagParser *parser, Flags *f) { 36 #define UBSAN_FLAG(Type, Name, DefaultValue, Description) \ 37 RegisterFlag(parser, #Name, Description, &f->Name); 38 #include "ubsan_flags.inc" 39 #undef UBSAN_FLAG 40 } 41 42 void InitializeFlags() { 43 SetCommonFlagsDefaults(); 44 { 45 CommonFlags cf; 46 cf.CopyFrom(*common_flags()); 47 cf.print_summary = false; 48 OverrideCommonFlags(cf); 49 } 50 51 Flags *f = flags(); 52 f->SetDefaults(); 53 54 FlagParser parser; 55 RegisterCommonFlags(&parser); 56 RegisterUbsanFlags(&parser, f); 57 58 // Override from user-specified string. 59 parser.ParseString(MaybeCallUbsanDefaultOptions()); 60 // Override from environment variable. 61 parser.ParseString(GetEnv("UBSAN_OPTIONS")); 62 InitializeCommonFlags(); 63 if (Verbosity()) ReportUnrecognizedFlags(); 64 65 if (common_flags()->help) parser.PrintFlagDescriptions(); 66 } 67 68 } // namespace __ubsan 69 70 extern "C" { 71 72 #if !SANITIZER_SUPPORTS_WEAK_HOOKS 73 SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE 74 const char *__ubsan_default_options() { return ""; } 75 #endif 76 77 #if SANITIZER_WINDOWS 78 const char *__ubsan_default_default_options() { return ""; } 79 # ifdef _WIN64 80 # pragma comment(linker, "/alternatename:__ubsan_default_options=__ubsan_default_default_options") 81 # else 82 # pragma comment(linker, "/alternatename:___ubsan_default_options=___ubsan_default_default_options") 83 # endif 84 #endif 85 86 } // extern "C" 87 88 #endif // CAN_SANITIZE_UB 89
