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_flags.h"
  13 #include "sanitizer_common/sanitizer_common.h"
  14 #include "sanitizer_common/sanitizer_flags.h"
  15
  16 namespace __ubsan {
  17
  18 static const char *MaybeCallUbsanDefaultOptions() {
  19   return (&__ubsan_default_options) ? __ubsan_default_options() : "";
  20 }
  21
  22 void InitializeCommonFlags() {
  23   CommonFlags *cf = common_flags();
  24   SetCommonFlagsDefaults(cf);
  25   cf->print_summary = false;
  26   // Override from user-specified string.
  27   ParseCommonFlagsFromString(cf, MaybeCallUbsanDefaultOptions());
  28   // Override from environment variable.
  29   ParseCommonFlagsFromString(cf, GetEnv("UBSAN_OPTIONS"));
  30 }
  31
  32 Flags ubsan_flags;
  33
  34 static void ParseFlagsFromString(Flags *f, const char *str) {
  35   if (!str)
  36     return;
  37   ParseFlag(str, &f->halt_on_error, "halt_on_error",
  38             "Crash the program after printing the first error report");
  39   ParseFlag(str, &f->print_stacktrace, "print_stacktrace",
  40             "Include full stacktrace into an error report");
  41 }
  42
  43 void InitializeFlags() {
  44   Flags *f = flags();
  45   // Default values.
  46   f->halt_on_error = false;
  47   f->print_stacktrace = false;
  48   // Override from user-specified string.
  49   ParseFlagsFromString(f, MaybeCallUbsanDefaultOptions());
  50   // Override from environment variable.
  51   ParseFlagsFromString(f, GetEnv("UBSAN_OPTIONS"));
  52 }
  53
  54 }  // namespace __ubsan
  55
  56 #if !SANITIZER_SUPPORTS_WEAK_HOOKS
  57 extern "C" {
  58 SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
  59 const char *__ubsan_default_options() { return ""; }
  60 }  // extern "C"
  61 #endif