libsanitizer/ubsan/ubsan_flags.cc

   1 //===-- ubsan_flags.cc ----------------------------------------------------===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // Runtime flags for UndefinedBehaviorSanitizer.
   9 //
  10 //===----------------------------------------------------------------------===//
  11
  12 #include "ubsan_platform.h"
  13 #if CAN_SANITIZE_UB
  14 #include "ubsan_flags.h"
  15 #include "sanitizer_common/sanitizer_common.h"
  16 #include "sanitizer_common/sanitizer_flags.h"
  17 #include "sanitizer_common/sanitizer_flag_parser.h"
  18
  19 namespace __ubsan {
  20
  21 const char *MaybeCallUbsanDefaultOptions() {
  22   return (&__ubsan_default_options) ? __ubsan_default_options() : "";
  23 }
  24
  25 Flags ubsan_flags;
  26
  27 void Flags::SetDefaults() {
  28 #define UBSAN_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
  29 #include "ubsan_flags.inc"
  30 #undef UBSAN_FLAG
  31 }
  32
  33 void RegisterUbsanFlags(FlagParser *parser, Flags *f) {
  34 #define UBSAN_FLAG(Type, Name, DefaultValue, Description) \
  35   RegisterFlag(parser, #Name, Description, &f->Name);
  36 #include "ubsan_flags.inc"
  37 #undef UBSAN_FLAG
  38 }
  39
  40 void InitializeFlags() {
  41   SetCommonFlagsDefaults();
  42   {
  43     CommonFlags cf;
  44     cf.CopyFrom(*common_flags());
  45     cf.print_summary = false;
  46     OverrideCommonFlags(cf);
  47   }
  48
  49   Flags *f = flags();
  50   f->SetDefaults();
  51
  52   FlagParser parser;
  53   RegisterCommonFlags(&parser);
  54   RegisterUbsanFlags(&parser, f);
  55
  56   // Override from user-specified string.
  57   parser.ParseString(MaybeCallUbsanDefaultOptions());
  58   // Override from environment variable.
  59   parser.ParseString(GetEnv("UBSAN_OPTIONS"));
  60   InitializeCommonFlags();
  61   if (Verbosity()) ReportUnrecognizedFlags();
  62
  63   if (common_flags()->help) parser.PrintFlagDescriptions();
  64 }
  65
  66 }  // namespace __ubsan
  67
  68 extern "C" {
  69
  70 #if !SANITIZER_SUPPORTS_WEAK_HOOKS
  71 SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
  72 const char *__ubsan_default_options() { return ""; }
  73 #endif
  74
  75 #if SANITIZER_WINDOWS
  76 const char *__ubsan_default_default_options() { return ""; }
  77 # ifdef _WIN64
  78 #  pragma comment(linker, "/alternatename:__ubsan_default_options=__ubsan_default_default_options")
  79 # else
  80 #  pragma comment(linker, "/alternatename:___ubsan_default_options=___ubsan_default_default_options")
  81 # endif
  82 #endif
  83
  84 }  // extern "C"
  85
  86 #endif  // CAN_SANITIZE_UB