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//===-- ubsan_flags.cpp ---------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Runtime flags for UndefinedBehaviorSanitizer.
//
//===----------------------------------------------------------------------===//
#include "ubsan_platform.h"
#if CAN_SANITIZE_UB
#include "ubsan_flags.h"
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_flags.h"
#include "sanitizer_common/sanitizer_flag_parser.h"
#include <stdlib.h>
namespace __ubsan {
const char *MaybeCallUbsanDefaultOptions() {
return (&__ubsan_default_options) ? __ubsan_default_options() : "";
}
static const char *GetFlag(const char *flag) {
// We cannot call getenv() from inside a preinit array initializer
if (SANITIZER_CAN_USE_PREINIT_ARRAY) {
return GetEnv(flag);
} else {
return getenv(flag);
}
}
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() {
SetCommonFlagsDefaults();
{
CommonFlags cf;
cf.CopyFrom(*common_flags());
cf.print_summary = false;
cf.external_symbolizer_path = GetFlag("UBSAN_SYMBOLIZER_PATH");
OverrideCommonFlags(cf);
}
Flags *f = flags();
f->SetDefaults();
FlagParser parser;
RegisterCommonFlags(&parser);
RegisterUbsanFlags(&parser, f);
// Override from user-specified string.
parser.ParseString(MaybeCallUbsanDefaultOptions());
// Override from environment variable.
parser.ParseStringFromEnv("UBSAN_OPTIONS");
InitializeCommonFlags();
if (Verbosity()) ReportUnrecognizedFlags();
if (common_flags()->help) parser.PrintFlagDescriptions();
}
} // namespace __ubsan
SANITIZER_INTERFACE_WEAK_DEF(const char *, __ubsan_default_options, void) {
return "";
}
#endif // CAN_SANITIZE_UB
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