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//===- Sanitizers.cpp - C Language Family Language Options ----------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file defines the classes from Sanitizers.h
//
//===----------------------------------------------------------------------===//
#include "clang/Basic/Sanitizers.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cmath>
#include <optional>
using namespace clang;
static const double SanitizerMaskCutoffsEps = 0.000000001f;
void SanitizerMaskCutoffs::set(SanitizerMask K, double V) {
if (V < SanitizerMaskCutoffsEps && Cutoffs.empty())
return;
for (unsigned int i = 0; i < SanitizerKind::SO_Count; ++i)
if (K & SanitizerMask::bitPosToMask(i)) {
Cutoffs.resize(SanitizerKind::SO_Count);
Cutoffs[i] = V;
}
}
std::optional<double> SanitizerMaskCutoffs::operator[](unsigned Kind) const {
if (Cutoffs.empty() || Cutoffs[Kind] < SanitizerMaskCutoffsEps)
return std::nullopt;
return Cutoffs[Kind];
}
void SanitizerMaskCutoffs::clear(SanitizerMask K) { set(K, 0); }
std::optional<std::vector<unsigned>>
SanitizerMaskCutoffs::getAllScaled(unsigned ScalingFactor) const {
std::vector<unsigned> ScaledCutoffs;
bool AnyCutoff = false;
for (unsigned int i = 0; i < SanitizerKind::SO_Count; ++i) {
auto C = (*this)[i];
if (C.has_value()) {
ScaledCutoffs.push_back(lround(std::clamp(*C, 0.0, 1.0) * ScalingFactor));
AnyCutoff = true;
} else {
ScaledCutoffs.push_back(0);
}
}
if (AnyCutoff)
return ScaledCutoffs;
return std::nullopt;
}
// Once LLVM switches to C++17, the constexpr variables can be inline and we
// won't need this.
#define SANITIZER(NAME, ID) constexpr SanitizerMask SanitizerKind::ID;
#define SANITIZER_GROUP(NAME, ID, ALIAS) \
constexpr SanitizerMask SanitizerKind::ID; \
constexpr SanitizerMask SanitizerKind::ID##Group;
#include "clang/Basic/Sanitizers.def"
SanitizerMask clang::parseSanitizerValue(StringRef Value, bool AllowGroups) {
SanitizerMask ParsedKind = llvm::StringSwitch<SanitizerMask>(Value)
#define SANITIZER(NAME, ID) .Case(NAME, SanitizerKind::ID)
#define SANITIZER_GROUP(NAME, ID, ALIAS) \
.Case(NAME, AllowGroups ? SanitizerKind::ID##Group : SanitizerMask())
#include "clang/Basic/Sanitizers.def"
.Default(SanitizerMask());
return ParsedKind;
}
bool clang::parseSanitizerWeightedValue(StringRef Value, bool AllowGroups,
SanitizerMaskCutoffs &Cutoffs) {
SanitizerMask ParsedKind = llvm::StringSwitch<SanitizerMask>(Value)
#define SANITIZER(NAME, ID) .StartsWith(NAME "=", SanitizerKind::ID)
#define SANITIZER_GROUP(NAME, ID, ALIAS) \
.StartsWith(NAME "=", \
AllowGroups ? SanitizerKind::ID##Group : SanitizerMask())
#include "clang/Basic/Sanitizers.def"
.Default(SanitizerMask());
if (!ParsedKind)
return false;
auto [N, W] = Value.split('=');
double A;
if (W.getAsDouble(A) || A < 0.0 || A > 1.0)
return false;
// AllowGroups is already taken into account for ParsedKind,
// hence we unconditionally expandSanitizerGroups.
Cutoffs.set(expandSanitizerGroups(ParsedKind), A);
return true;
}
void clang::serializeSanitizerSet(SanitizerSet Set,
SmallVectorImpl<StringRef> &Values) {
#define SANITIZER(NAME, ID) \
if (Set.has(SanitizerKind::ID)) \
Values.push_back(NAME);
#include "clang/Basic/Sanitizers.def"
}
void clang::serializeSanitizerMaskCutoffs(
const SanitizerMaskCutoffs &Cutoffs, SmallVectorImpl<std::string> &Values) {
#define SANITIZER(NAME, ID) \
if (auto C = Cutoffs[SanitizerKind::SO_##ID]) { \
std::string Str; \
llvm::raw_string_ostream OS(Str); \
OS << NAME "=" << llvm::format("%.8f", *C); \
Values.emplace_back(StringRef(Str).rtrim('0')); \
}
#include "clang/Basic/Sanitizers.def"
}
SanitizerMask clang::expandSanitizerGroups(SanitizerMask Kinds) {
#define SANITIZER(NAME, ID)
#define SANITIZER_GROUP(NAME, ID, ALIAS) \
if (Kinds & SanitizerKind::ID##Group) \
Kinds |= SanitizerKind::ID;
#include "clang/Basic/Sanitizers.def"
return Kinds;
}
llvm::hash_code SanitizerMask::hash_value() const {
return llvm::hash_combine_range(&maskLoToHigh[0], &maskLoToHigh[kNumElem]);
}
namespace clang {
unsigned SanitizerMask::countPopulation() const {
unsigned total = 0;
for (const auto &Val : maskLoToHigh)
total += llvm::popcount(Val);
return total;
}
llvm::hash_code hash_value(const clang::SanitizerMask &Arg) {
return Arg.hash_value();
}
StringRef AsanDtorKindToString(llvm::AsanDtorKind kind) {
switch (kind) {
case llvm::AsanDtorKind::None:
return "none";
case llvm::AsanDtorKind::Global:
return "global";
case llvm::AsanDtorKind::Invalid:
return "invalid";
}
return "invalid";
}
llvm::AsanDtorKind AsanDtorKindFromString(StringRef kindStr) {
return llvm::StringSwitch<llvm::AsanDtorKind>(kindStr)
.Case("none", llvm::AsanDtorKind::None)
.Case("global", llvm::AsanDtorKind::Global)
.Default(llvm::AsanDtorKind::Invalid);
}
StringRef AsanDetectStackUseAfterReturnModeToString(
llvm::AsanDetectStackUseAfterReturnMode mode) {
switch (mode) {
case llvm::AsanDetectStackUseAfterReturnMode::Always:
return "always";
case llvm::AsanDetectStackUseAfterReturnMode::Runtime:
return "runtime";
case llvm::AsanDetectStackUseAfterReturnMode::Never:
return "never";
case llvm::AsanDetectStackUseAfterReturnMode::Invalid:
return "invalid";
}
return "invalid";
}
llvm::AsanDetectStackUseAfterReturnMode
AsanDetectStackUseAfterReturnModeFromString(StringRef modeStr) {
return llvm::StringSwitch<llvm::AsanDetectStackUseAfterReturnMode>(modeStr)
.Case("always", llvm::AsanDetectStackUseAfterReturnMode::Always)
.Case("runtime", llvm::AsanDetectStackUseAfterReturnMode::Runtime)
.Case("never", llvm::AsanDetectStackUseAfterReturnMode::Never)
.Default(llvm::AsanDetectStackUseAfterReturnMode::Invalid);
}
} // namespace clang
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