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//===-- ubsan_flags.cc ----------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Runtime flags for UndefinedBehaviorSanitizer.
//
//===----------------------------------------------------------------------===//
#include "ubsan_flags.h"
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_flags.h"
#include "sanitizer_common/sanitizer_flag_parser.h"
namespace __ubsan {
static const char *MaybeCallUbsanDefaultOptions() {
return (&__ubsan_default_options) ? __ubsan_default_options() : "";
}
Flags ubsan_flags;
void Flags::SetDefaults() {
#define UBSAN_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
#include "ubsan_flags.inc"
#undef UBSAN_FLAG
}
void RegisterUbsanFlags(FlagParser *parser, Flags *f) {
#define UBSAN_FLAG(Type, Name, DefaultValue, Description) \
RegisterFlag(parser, #Name, Description, &f->Name);
#include "ubsan_flags.inc"
#undef UBSAN_FLAG
}
void InitializeFlags(bool standalone) {
Flags *f = flags();
FlagParser parser;
RegisterUbsanFlags(&parser, f);
if (standalone) {
RegisterCommonFlags(&parser);
SetCommonFlagsDefaults();
CommonFlags cf;
cf.CopyFrom(*common_flags());
cf.print_summary = false;
OverrideCommonFlags(cf);
} else {
// Ignore common flags if not standalone.
// This is inconsistent with LSan, which allows common flags in LSAN_FLAGS.
// This is caused by undefined initialization order between ASan and UBsan,
// which makes it impossible to make sure that common flags from ASAN_OPTIONS
// have not been used (in __asan_init) before they are overwritten with flags
// from UBSAN_OPTIONS.
CommonFlags cf_ignored;
RegisterCommonFlags(&parser, &cf_ignored);
}
f->SetDefaults();
// Override from user-specified string.
parser.ParseString(MaybeCallUbsanDefaultOptions());
// Override from environment variable.
parser.ParseString(GetEnv("UBSAN_OPTIONS"));
SetVerbosity(common_flags()->verbosity);
}
} // namespace __ubsan
#if !SANITIZER_SUPPORTS_WEAK_HOOKS
extern "C" {
SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
const char *__ubsan_default_options() { return ""; }
} // extern "C"
#endif
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