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