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diff --git a/contrib/llvm/tools/clang/lib/Driver/SanitizerArgs.cpp b/contrib/llvm/tools/clang/lib/Driver/SanitizerArgs.cpp
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+++ b/contrib/llvm/tools/clang/lib/Driver/SanitizerArgs.cpp
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+//===--- SanitizerArgs.cpp - Arguments for sanitizer tools ---------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+#include "clang/Driver/SanitizerArgs.h"
+#include "ToolChains/CommonArgs.h"
+#include "clang/Basic/Sanitizers.h"
+#include "clang/Driver/Driver.h"
+#include "clang/Driver/DriverDiagnostic.h"
+#include "clang/Driver/Options.h"
+#include "clang/Driver/ToolChain.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/SpecialCaseList.h"
+#include "llvm/Support/TargetParser.h"
+#include <memory>
+
+using namespace clang;
+using namespace clang::SanitizerKind;
+using namespace clang::driver;
+using namespace llvm::opt;
+
+enum : SanitizerMask {
+ NeedsUbsanRt = Undefined | Integer | ImplicitConversion | Nullability | CFI,
+ NeedsUbsanCxxRt = Vptr | CFI,
+ NotAllowedWithTrap = Vptr,
+ NotAllowedWithMinimalRuntime = Vptr,
+ RequiresPIE = DataFlow | HWAddress | Scudo,
+ NeedsUnwindTables = Address | HWAddress | Thread | Memory | DataFlow,
+ SupportsCoverage = Address | HWAddress | KernelAddress | KernelHWAddress |
+ Memory | KernelMemory | Leak | Undefined | Integer |
+ ImplicitConversion | Nullability | DataFlow | Fuzzer |
+ FuzzerNoLink,
+ RecoverableByDefault = Undefined | Integer | ImplicitConversion | Nullability,
+ Unrecoverable = Unreachable | Return,
+ AlwaysRecoverable = KernelAddress | KernelHWAddress,
+ LegacyFsanitizeRecoverMask = Undefined | Integer,
+ NeedsLTO = CFI,
+ TrappingSupported = (Undefined & ~Vptr) | UnsignedIntegerOverflow |
+ ImplicitConversion | Nullability | LocalBounds | CFI,
+ TrappingDefault = CFI,
+ CFIClasses =
+ CFIVCall | CFINVCall | CFIMFCall | CFIDerivedCast | CFIUnrelatedCast,
+ CompatibleWithMinimalRuntime = TrappingSupported | Scudo | ShadowCallStack,
+};
+
+enum CoverageFeature {
+ CoverageFunc = 1 << 0,
+ CoverageBB = 1 << 1,
+ CoverageEdge = 1 << 2,
+ CoverageIndirCall = 1 << 3,
+ CoverageTraceBB = 1 << 4, // Deprecated.
+ CoverageTraceCmp = 1 << 5,
+ CoverageTraceDiv = 1 << 6,
+ CoverageTraceGep = 1 << 7,
+ Coverage8bitCounters = 1 << 8, // Deprecated.
+ CoverageTracePC = 1 << 9,
+ CoverageTracePCGuard = 1 << 10,
+ CoverageNoPrune = 1 << 11,
+ CoverageInline8bitCounters = 1 << 12,
+ CoveragePCTable = 1 << 13,
+ CoverageStackDepth = 1 << 14,
+};
+
+/// Parse a -fsanitize= or -fno-sanitize= argument's values, diagnosing any
+/// invalid components. Returns a SanitizerMask.
+static SanitizerMask parseArgValues(const Driver &D, const llvm::opt::Arg *A,
+ bool DiagnoseErrors);
+
+/// Parse -f(no-)?sanitize-coverage= flag values, diagnosing any invalid
+/// components. Returns OR of members of \c CoverageFeature enumeration.
+static int parseCoverageFeatures(const Driver &D, const llvm::opt::Arg *A);
+
+/// Produce an argument string from ArgList \p Args, which shows how it
+/// provides some sanitizer kind from \p Mask. For example, the argument list
+/// "-fsanitize=thread,vptr -fsanitize=address" with mask \c NeedsUbsanRt
+/// would produce "-fsanitize=vptr".
+static std::string lastArgumentForMask(const Driver &D,
+ const llvm::opt::ArgList &Args,
+ SanitizerMask Mask);
+
+/// Produce an argument string from argument \p A, which shows how it provides
+/// a value in \p Mask. For instance, the argument
+/// "-fsanitize=address,alignment" with mask \c NeedsUbsanRt would produce
+/// "-fsanitize=alignment".
+static std::string describeSanitizeArg(const llvm::opt::Arg *A,
+ SanitizerMask Mask);
+
+/// Produce a string containing comma-separated names of sanitizers in \p
+/// Sanitizers set.
+static std::string toString(const clang::SanitizerSet &Sanitizers);
+
+static void addDefaultBlacklists(const Driver &D, SanitizerMask Kinds,
+ std::vector<std::string> &BlacklistFiles) {
+ struct Blacklist {
+ const char *File;
+ SanitizerMask Mask;
+ } Blacklists[] = {{"asan_blacklist.txt", Address},
+ {"hwasan_blacklist.txt", HWAddress},
+ {"msan_blacklist.txt", Memory},
+ {"tsan_blacklist.txt", Thread},
+ {"dfsan_abilist.txt", DataFlow},
+ {"cfi_blacklist.txt", CFI},
+ {"ubsan_blacklist.txt", Undefined | Integer | Nullability}};
+
+ for (auto BL : Blacklists) {
+ if (!(Kinds & BL.Mask))
+ continue;
+
+ clang::SmallString<64> Path(D.ResourceDir);
+ llvm::sys::path::append(Path, "share", BL.File);
+ if (llvm::sys::fs::exists(Path))
+ BlacklistFiles.push_back(Path.str());
+ else if (BL.Mask == CFI)
+ // If cfi_blacklist.txt cannot be found in the resource dir, driver
+ // should fail.
+ D.Diag(clang::diag::err_drv_no_such_file) << Path;
+ }
+}
+
+/// Sets group bits for every group that has at least one representative already
+/// enabled in \p Kinds.
+static SanitizerMask setGroupBits(SanitizerMask Kinds) {
+#define SANITIZER(NAME, ID)
+#define SANITIZER_GROUP(NAME, ID, ALIAS) \
+ if (Kinds & SanitizerKind::ID) \
+ Kinds |= SanitizerKind::ID##Group;
+#include "clang/Basic/Sanitizers.def"
+ return Kinds;
+}
+
+static SanitizerMask parseSanitizeTrapArgs(const Driver &D,
+ const llvm::opt::ArgList &Args) {
+ SanitizerMask TrapRemove = 0; // During the loop below, the accumulated set of
+ // sanitizers disabled by the current sanitizer
+ // argument or any argument after it.
+ SanitizerMask TrappingKinds = 0;
+ SanitizerMask TrappingSupportedWithGroups = setGroupBits(TrappingSupported);
+
+ for (ArgList::const_reverse_iterator I = Args.rbegin(), E = Args.rend();
+ I != E; ++I) {
+ const auto *Arg = *I;
+ if (Arg->getOption().matches(options::OPT_fsanitize_trap_EQ)) {
+ Arg->claim();
+ SanitizerMask Add = parseArgValues(D, Arg, true);
+ Add &= ~TrapRemove;
+ if (SanitizerMask InvalidValues = Add & ~TrappingSupportedWithGroups) {
+ SanitizerSet S;
+ S.Mask = InvalidValues;
+ D.Diag(diag::err_drv_unsupported_option_argument) << "-fsanitize-trap"
+ << toString(S);
+ }
+ TrappingKinds |= expandSanitizerGroups(Add) & ~TrapRemove;
+ } else if (Arg->getOption().matches(options::OPT_fno_sanitize_trap_EQ)) {
+ Arg->claim();
+ TrapRemove |= expandSanitizerGroups(parseArgValues(D, Arg, true));
+ } else if (Arg->getOption().matches(
+ options::OPT_fsanitize_undefined_trap_on_error)) {
+ Arg->claim();
+ TrappingKinds |=
+ expandSanitizerGroups(UndefinedGroup & ~TrapRemove) & ~TrapRemove;
+ } else if (Arg->getOption().matches(
+ options::OPT_fno_sanitize_undefined_trap_on_error)) {
+ Arg->claim();
+ TrapRemove |= expandSanitizerGroups(UndefinedGroup);
+ }
+ }
+
+ // Apply default trapping behavior.
+ TrappingKinds |= TrappingDefault & ~TrapRemove;
+
+ return TrappingKinds;
+}
+
+bool SanitizerArgs::needsUbsanRt() const {
+ // All of these include ubsan.
+ if (needsAsanRt() || needsMsanRt() || needsHwasanRt() || needsTsanRt() ||
+ needsDfsanRt() || needsLsanRt() || needsCfiDiagRt() ||
+ (needsScudoRt() && !requiresMinimalRuntime()))
+ return false;
+
+ return (Sanitizers.Mask & NeedsUbsanRt & ~TrapSanitizers.Mask) ||
+ CoverageFeatures;
+}
+
+bool SanitizerArgs::needsCfiRt() const {
+ return !(Sanitizers.Mask & CFI & ~TrapSanitizers.Mask) && CfiCrossDso &&
+ !ImplicitCfiRuntime;
+}
+
+bool SanitizerArgs::needsCfiDiagRt() const {
+ return (Sanitizers.Mask & CFI & ~TrapSanitizers.Mask) && CfiCrossDso &&
+ !ImplicitCfiRuntime;
+}
+
+bool SanitizerArgs::requiresPIE() const {
+ return NeedPIE || (Sanitizers.Mask & RequiresPIE);
+}
+
+bool SanitizerArgs::needsUnwindTables() const {
+ return Sanitizers.Mask & NeedsUnwindTables;
+}
+
+bool SanitizerArgs::needsLTO() const { return Sanitizers.Mask & NeedsLTO; }
+
+SanitizerArgs::SanitizerArgs(const ToolChain &TC,
+ const llvm::opt::ArgList &Args) {
+ SanitizerMask AllRemove = 0; // During the loop below, the accumulated set of
+ // sanitizers disabled by the current sanitizer
+ // argument or any argument after it.
+ SanitizerMask AllAddedKinds = 0; // Mask of all sanitizers ever enabled by
+ // -fsanitize= flags (directly or via group
+ // expansion), some of which may be disabled
+ // later. Used to carefully prune
+ // unused-argument diagnostics.
+ SanitizerMask DiagnosedKinds = 0; // All Kinds we have diagnosed up to now.
+ // Used to deduplicate diagnostics.
+ SanitizerMask Kinds = 0;
+ const SanitizerMask Supported = setGroupBits(TC.getSupportedSanitizers());
+
+ CfiCrossDso = Args.hasFlag(options::OPT_fsanitize_cfi_cross_dso,
+ options::OPT_fno_sanitize_cfi_cross_dso, false);
+
+ ToolChain::RTTIMode RTTIMode = TC.getRTTIMode();
+
+ const Driver &D = TC.getDriver();
+ SanitizerMask TrappingKinds = parseSanitizeTrapArgs(D, Args);
+ SanitizerMask InvalidTrappingKinds = TrappingKinds & NotAllowedWithTrap;
+
+ MinimalRuntime =
+ Args.hasFlag(options::OPT_fsanitize_minimal_runtime,
+ options::OPT_fno_sanitize_minimal_runtime, MinimalRuntime);
+
+ // The object size sanitizer should not be enabled at -O0.
+ Arg *OptLevel = Args.getLastArg(options::OPT_O_Group);
+ bool RemoveObjectSizeAtO0 =
+ !OptLevel || OptLevel->getOption().matches(options::OPT_O0);
+
+ for (ArgList::const_reverse_iterator I = Args.rbegin(), E = Args.rend();
+ I != E; ++I) {
+ const auto *Arg = *I;
+ if (Arg->getOption().matches(options::OPT_fsanitize_EQ)) {
+ Arg->claim();
+ SanitizerMask Add = parseArgValues(D, Arg, /*AllowGroups=*/true);
+
+ if (RemoveObjectSizeAtO0) {
+ AllRemove |= SanitizerKind::ObjectSize;
+
+ // The user explicitly enabled the object size sanitizer. Warn that
+ // that this does nothing at -O0.
+ if (Add & SanitizerKind::ObjectSize)
+ D.Diag(diag::warn_drv_object_size_disabled_O0)
+ << Arg->getAsString(Args);
+ }
+
+ AllAddedKinds |= expandSanitizerGroups(Add);
+
+ // Avoid diagnosing any sanitizer which is disabled later.
+ Add &= ~AllRemove;
+ // At this point we have not expanded groups, so any unsupported
+ // sanitizers in Add are those which have been explicitly enabled.
+ // Diagnose them.
+ if (SanitizerMask KindsToDiagnose =
+ Add & InvalidTrappingKinds & ~DiagnosedKinds) {
+ std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
+ D.Diag(diag::err_drv_argument_not_allowed_with)
+ << Desc << "-fsanitize-trap=undefined";
+ DiagnosedKinds |= KindsToDiagnose;
+ }
+ Add &= ~InvalidTrappingKinds;
+
+ if (MinimalRuntime) {
+ if (SanitizerMask KindsToDiagnose =
+ Add & NotAllowedWithMinimalRuntime & ~DiagnosedKinds) {
+ std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
+ D.Diag(diag::err_drv_argument_not_allowed_with)
+ << Desc << "-fsanitize-minimal-runtime";
+ DiagnosedKinds |= KindsToDiagnose;
+ }
+ Add &= ~NotAllowedWithMinimalRuntime;
+ }
+
+ // FIXME: Make CFI on member function calls compatible with cross-DSO CFI.
+ // There are currently two problems:
+ // - Virtual function call checks need to pass a pointer to the function
+ // address to llvm.type.test and a pointer to the address point to the
+ // diagnostic function. Currently we pass the same pointer to both
+ // places.
+ // - Non-virtual function call checks may need to check multiple type
+ // identifiers.
+ // Fixing both of those may require changes to the cross-DSO CFI
+ // interface.
+ if (CfiCrossDso && (Add & CFIMFCall & ~DiagnosedKinds)) {
+ D.Diag(diag::err_drv_argument_not_allowed_with)
+ << "-fsanitize=cfi-mfcall"
+ << "-fsanitize-cfi-cross-dso";
+ Add &= ~CFIMFCall;
+ DiagnosedKinds |= CFIMFCall;
+ }
+
+ if (SanitizerMask KindsToDiagnose = Add & ~Supported & ~DiagnosedKinds) {
+ std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
+ D.Diag(diag::err_drv_unsupported_opt_for_target)
+ << Desc << TC.getTriple().str();
+ DiagnosedKinds |= KindsToDiagnose;
+ }
+ Add &= Supported;
+
+ // Test for -fno-rtti + explicit -fsanitizer=vptr before expanding groups
+ // so we don't error out if -fno-rtti and -fsanitize=undefined were
+ // passed.
+ if ((Add & Vptr) && (RTTIMode == ToolChain::RM_Disabled)) {
+ if (const llvm::opt::Arg *NoRTTIArg = TC.getRTTIArg()) {
+ assert(NoRTTIArg->getOption().matches(options::OPT_fno_rtti) &&
+ "RTTI disabled without -fno-rtti option?");
+ // The user explicitly passed -fno-rtti with -fsanitize=vptr, but
+ // the vptr sanitizer requires RTTI, so this is a user error.
+ D.Diag(diag::err_drv_argument_not_allowed_with)
+ << "-fsanitize=vptr" << NoRTTIArg->getAsString(Args);
+ } else {
+ // The vptr sanitizer requires RTTI, but RTTI is disabled (by
+ // default). Warn that the vptr sanitizer is being disabled.
+ D.Diag(diag::warn_drv_disabling_vptr_no_rtti_default);
+ }
+
+ // Take out the Vptr sanitizer from the enabled sanitizers
+ AllRemove |= Vptr;
+ }
+
+ Add = expandSanitizerGroups(Add);
+ // Group expansion may have enabled a sanitizer which is disabled later.
+ Add &= ~AllRemove;
+ // Silently discard any unsupported sanitizers implicitly enabled through
+ // group expansion.
+ Add &= ~InvalidTrappingKinds;
+ if (MinimalRuntime) {
+ Add &= ~NotAllowedWithMinimalRuntime;
+ }
+ if (CfiCrossDso)
+ Add &= ~CFIMFCall;
+ Add &= Supported;
+
+ if (Add & Fuzzer)
+ Add |= FuzzerNoLink;
+
+ // Enable coverage if the fuzzing flag is set.
+ if (Add & FuzzerNoLink) {
+ CoverageFeatures |= CoverageInline8bitCounters | CoverageIndirCall |
+ CoverageTraceCmp | CoveragePCTable;
+ // Due to TLS differences, stack depth tracking is only enabled on Linux
+ if (TC.getTriple().isOSLinux())
+ CoverageFeatures |= CoverageStackDepth;
+ }
+
+ Kinds |= Add;
+ } else if (Arg->getOption().matches(options::OPT_fno_sanitize_EQ)) {
+ Arg->claim();
+ SanitizerMask Remove = parseArgValues(D, Arg, true);
+ AllRemove |= expandSanitizerGroups(Remove);
+ }
+ }
+
+ std::pair<SanitizerMask, SanitizerMask> IncompatibleGroups[] = {
+ std::make_pair(Address, Thread | Memory),
+ std::make_pair(Thread, Memory),
+ std::make_pair(Leak, Thread | Memory),
+ std::make_pair(KernelAddress, Address | Leak | Thread | Memory),
+ std::make_pair(HWAddress, Address | Thread | Memory | KernelAddress),
+ std::make_pair(Efficiency, Address | HWAddress | Leak | Thread | Memory |
+ KernelAddress),
+ std::make_pair(Scudo, Address | HWAddress | Leak | Thread | Memory |
+ KernelAddress | Efficiency),
+ std::make_pair(SafeStack, Address | HWAddress | Leak | Thread | Memory |
+ KernelAddress | Efficiency),
+ std::make_pair(KernelHWAddress, Address | HWAddress | Leak | Thread |
+ Memory | KernelAddress | Efficiency |
+ SafeStack),
+ std::make_pair(KernelMemory, Address | HWAddress | Leak | Thread |
+ Memory | KernelAddress | Efficiency |
+ Scudo | SafeStack)};
+ // Enable toolchain specific default sanitizers if not explicitly disabled.
+ SanitizerMask Default = TC.getDefaultSanitizers() & ~AllRemove;
+
+ // Disable default sanitizers that are incompatible with explicitly requested
+ // ones.
+ for (auto G : IncompatibleGroups) {
+ SanitizerMask Group = G.first;
+ if ((Default & Group) && (Kinds & G.second))
+ Default &= ~Group;
+ }
+
+ Kinds |= Default;
+
+ // We disable the vptr sanitizer if it was enabled by group expansion but RTTI
+ // is disabled.
+ if ((Kinds & Vptr) && (RTTIMode == ToolChain::RM_Disabled)) {
+ Kinds &= ~Vptr;
+ }
+
+ // Check that LTO is enabled if we need it.
+ if ((Kinds & NeedsLTO) && !D.isUsingLTO()) {
+ D.Diag(diag::err_drv_argument_only_allowed_with)
+ << lastArgumentForMask(D, Args, Kinds & NeedsLTO) << "-flto";
+ }
+
+ if ((Kinds & ShadowCallStack) &&
+ TC.getTriple().getArch() == llvm::Triple::aarch64 &&
+ !llvm::AArch64::isX18ReservedByDefault(TC.getTriple()) &&
+ !Args.hasArg(options::OPT_ffixed_x18)) {
+ D.Diag(diag::err_drv_argument_only_allowed_with)
+ << lastArgumentForMask(D, Args, Kinds & ShadowCallStack)
+ << "-ffixed-x18";
+ }
+
+ // Report error if there are non-trapping sanitizers that require
+ // c++abi-specific parts of UBSan runtime, and they are not provided by the
+ // toolchain. We don't have a good way to check the latter, so we just
+ // check if the toolchan supports vptr.
+ if (~Supported & Vptr) {
+ SanitizerMask KindsToDiagnose = Kinds & ~TrappingKinds & NeedsUbsanCxxRt;
+ // The runtime library supports the Microsoft C++ ABI, but only well enough
+ // for CFI. FIXME: Remove this once we support vptr on Windows.
+ if (TC.getTriple().isOSWindows())
+ KindsToDiagnose &= ~CFI;
+ if (KindsToDiagnose) {
+ SanitizerSet S;
+ S.Mask = KindsToDiagnose;
+ D.Diag(diag::err_drv_unsupported_opt_for_target)
+ << ("-fno-sanitize-trap=" + toString(S)) << TC.getTriple().str();
+ Kinds &= ~KindsToDiagnose;
+ }
+ }
+
+ // Warn about incompatible groups of sanitizers.
+ for (auto G : IncompatibleGroups) {
+ SanitizerMask Group = G.first;
+ if (Kinds & Group) {
+ if (SanitizerMask Incompatible = Kinds & G.second) {
+ D.Diag(clang::diag::err_drv_argument_not_allowed_with)
+ << lastArgumentForMask(D, Args, Group)
+ << lastArgumentForMask(D, Args, Incompatible);
+ Kinds &= ~Incompatible;
+ }
+ }
+ }
+ // FIXME: Currently -fsanitize=leak is silently ignored in the presence of
+ // -fsanitize=address. Perhaps it should print an error, or perhaps
+ // -f(-no)sanitize=leak should change whether leak detection is enabled by
+ // default in ASan?
+
+ // Parse -f(no-)?sanitize-recover flags.
+ SanitizerMask RecoverableKinds = RecoverableByDefault | AlwaysRecoverable;
+ SanitizerMask DiagnosedUnrecoverableKinds = 0;
+ SanitizerMask DiagnosedAlwaysRecoverableKinds = 0;
+ for (const auto *Arg : Args) {
+ const char *DeprecatedReplacement = nullptr;
+ if (Arg->getOption().matches(options::OPT_fsanitize_recover)) {
+ DeprecatedReplacement =
+ "-fsanitize-recover=undefined,integer' or '-fsanitize-recover=all";
+ RecoverableKinds |= expandSanitizerGroups(LegacyFsanitizeRecoverMask);
+ Arg->claim();
+ } else if (Arg->getOption().matches(options::OPT_fno_sanitize_recover)) {
+ DeprecatedReplacement = "-fno-sanitize-recover=undefined,integer' or "
+ "'-fno-sanitize-recover=all";
+ RecoverableKinds &= ~expandSanitizerGroups(LegacyFsanitizeRecoverMask);
+ Arg->claim();
+ } else if (Arg->getOption().matches(options::OPT_fsanitize_recover_EQ)) {
+ SanitizerMask Add = parseArgValues(D, Arg, true);
+ // Report error if user explicitly tries to recover from unrecoverable
+ // sanitizer.
+ if (SanitizerMask KindsToDiagnose =
+ Add & Unrecoverable & ~DiagnosedUnrecoverableKinds) {
+ SanitizerSet SetToDiagnose;
+ SetToDiagnose.Mask |= KindsToDiagnose;
+ D.Diag(diag::err_drv_unsupported_option_argument)
+ << Arg->getOption().getName() << toString(SetToDiagnose);
+ DiagnosedUnrecoverableKinds |= KindsToDiagnose;
+ }
+ RecoverableKinds |= expandSanitizerGroups(Add);
+ Arg->claim();
+ } else if (Arg->getOption().matches(options::OPT_fno_sanitize_recover_EQ)) {
+ SanitizerMask Remove = parseArgValues(D, Arg, true);
+ // Report error if user explicitly tries to disable recovery from
+ // always recoverable sanitizer.
+ if (SanitizerMask KindsToDiagnose =
+ Remove & AlwaysRecoverable & ~DiagnosedAlwaysRecoverableKinds) {
+ SanitizerSet SetToDiagnose;
+ SetToDiagnose.Mask |= KindsToDiagnose;
+ D.Diag(diag::err_drv_unsupported_option_argument)
+ << Arg->getOption().getName() << toString(SetToDiagnose);
+ DiagnosedAlwaysRecoverableKinds |= KindsToDiagnose;
+ }
+ RecoverableKinds &= ~expandSanitizerGroups(Remove);
+ Arg->claim();
+ }
+ if (DeprecatedReplacement) {
+ D.Diag(diag::warn_drv_deprecated_arg) << Arg->getAsString(Args)
+ << DeprecatedReplacement;
+ }
+ }
+ RecoverableKinds &= Kinds;
+ RecoverableKinds &= ~Unrecoverable;
+
+ TrappingKinds &= Kinds;
+ RecoverableKinds &= ~TrappingKinds;
+
+ // Setup blacklist files.
+ // Add default blacklist from resource directory.
+ addDefaultBlacklists(D, Kinds, BlacklistFiles);
+ // Parse -f(no-)sanitize-blacklist options.
+ for (const auto *Arg : Args) {
+ if (Arg->getOption().matches(options::OPT_fsanitize_blacklist)) {
+ Arg->claim();
+ std::string BLPath = Arg->getValue();
+ if (llvm::sys::fs::exists(BLPath)) {
+ BlacklistFiles.push_back(BLPath);
+ ExtraDeps.push_back(BLPath);
+ } else {
+ D.Diag(clang::diag::err_drv_no_such_file) << BLPath;
+ }
+ } else if (Arg->getOption().matches(options::OPT_fno_sanitize_blacklist)) {
+ Arg->claim();
+ BlacklistFiles.clear();
+ ExtraDeps.clear();
+ }
+ }
+ // Validate blacklists format.
+ {
+ std::string BLError;
+ std::unique_ptr<llvm::SpecialCaseList> SCL(
+ llvm::SpecialCaseList::create(BlacklistFiles, BLError));
+ if (!SCL.get())
+ D.Diag(clang::diag::err_drv_malformed_sanitizer_blacklist) << BLError;
+ }
+
+ // Parse -f[no-]sanitize-memory-track-origins[=level] options.
+ if (AllAddedKinds & Memory) {
+ if (Arg *A =
+ Args.getLastArg(options::OPT_fsanitize_memory_track_origins_EQ,
+ options::OPT_fsanitize_memory_track_origins,
+ options::OPT_fno_sanitize_memory_track_origins)) {
+ if (A->getOption().matches(options::OPT_fsanitize_memory_track_origins)) {
+ MsanTrackOrigins = 2;
+ } else if (A->getOption().matches(
+ options::OPT_fno_sanitize_memory_track_origins)) {
+ MsanTrackOrigins = 0;
+ } else {
+ StringRef S = A->getValue();
+ if (S.getAsInteger(0, MsanTrackOrigins) || MsanTrackOrigins < 0 ||
+ MsanTrackOrigins > 2) {
+ D.Diag(clang::diag::err_drv_invalid_value) << A->getAsString(Args) << S;
+ }
+ }
+ }
+ MsanUseAfterDtor =
+ Args.hasFlag(options::OPT_fsanitize_memory_use_after_dtor,
+ options::OPT_fno_sanitize_memory_use_after_dtor,
+ MsanUseAfterDtor);
+ NeedPIE |= !(TC.getTriple().isOSLinux() &&
+ TC.getTriple().getArch() == llvm::Triple::x86_64);
+ } else {
+ MsanUseAfterDtor = false;
+ }
+
+ if (AllAddedKinds & Thread) {
+ TsanMemoryAccess = Args.hasFlag(options::OPT_fsanitize_thread_memory_access,
+ options::OPT_fno_sanitize_thread_memory_access,
+ TsanMemoryAccess);
+ TsanFuncEntryExit = Args.hasFlag(options::OPT_fsanitize_thread_func_entry_exit,
+ options::OPT_fno_sanitize_thread_func_entry_exit,
+ TsanFuncEntryExit);
+ TsanAtomics = Args.hasFlag(options::OPT_fsanitize_thread_atomics,
+ options::OPT_fno_sanitize_thread_atomics,
+ TsanAtomics);
+ }
+
+ if (AllAddedKinds & CFI) {
+ // Without PIE, external function address may resolve to a PLT record, which
+ // can not be verified by the target module.
+ NeedPIE |= CfiCrossDso;
+ CfiICallGeneralizePointers =
+ Args.hasArg(options::OPT_fsanitize_cfi_icall_generalize_pointers);
+
+ if (CfiCrossDso && CfiICallGeneralizePointers)
+ D.Diag(diag::err_drv_argument_not_allowed_with)
+ << "-fsanitize-cfi-cross-dso"
+ << "-fsanitize-cfi-icall-generalize-pointers";
+ }
+
+ Stats = Args.hasFlag(options::OPT_fsanitize_stats,
+ options::OPT_fno_sanitize_stats, false);
+
+ if (MinimalRuntime) {
+ SanitizerMask IncompatibleMask =
+ Kinds & ~setGroupBits(CompatibleWithMinimalRuntime);
+ if (IncompatibleMask)
+ D.Diag(clang::diag::err_drv_argument_not_allowed_with)
+ << "-fsanitize-minimal-runtime"
+ << lastArgumentForMask(D, Args, IncompatibleMask);
+
+ SanitizerMask NonTrappingCfi = Kinds & CFI & ~TrappingKinds;
+ if (NonTrappingCfi)
+ D.Diag(clang::diag::err_drv_argument_only_allowed_with)
+ << "fsanitize-minimal-runtime"
+ << "fsanitize-trap=cfi";
+ }
+
+ // Parse -f(no-)?sanitize-coverage flags if coverage is supported by the
+ // enabled sanitizers.
+ for (const auto *Arg : Args) {
+ if (Arg->getOption().matches(options::OPT_fsanitize_coverage)) {
+ int LegacySanitizeCoverage;
+ if (Arg->getNumValues() == 1 &&
+ !StringRef(Arg->getValue(0))
+ .getAsInteger(0, LegacySanitizeCoverage)) {
+ CoverageFeatures = 0;
+ Arg->claim();
+ if (LegacySanitizeCoverage != 0) {
+ D.Diag(diag::warn_drv_deprecated_arg)
+ << Arg->getAsString(Args) << "-fsanitize-coverage=trace-pc-guard";
+ }
+ continue;
+ }
+ CoverageFeatures |= parseCoverageFeatures(D, Arg);
+
+ // Disable coverage and not claim the flags if there is at least one
+ // non-supporting sanitizer.
+ if (!(AllAddedKinds & ~AllRemove & ~setGroupBits(SupportsCoverage))) {
+ Arg->claim();
+ } else {
+ CoverageFeatures = 0;
+ }
+ } else if (Arg->getOption().matches(options::OPT_fno_sanitize_coverage)) {
+ Arg->claim();
+ CoverageFeatures &= ~parseCoverageFeatures(D, Arg);
+ }
+ }
+ // Choose at most one coverage type: function, bb, or edge.
+ if ((CoverageFeatures & CoverageFunc) && (CoverageFeatures & CoverageBB))
+ D.Diag(clang::diag::err_drv_argument_not_allowed_with)
+ << "-fsanitize-coverage=func"
+ << "-fsanitize-coverage=bb";
+ if ((CoverageFeatures & CoverageFunc) && (CoverageFeatures & CoverageEdge))
+ D.Diag(clang::diag::err_drv_argument_not_allowed_with)
+ << "-fsanitize-coverage=func"
+ << "-fsanitize-coverage=edge";
+ if ((CoverageFeatures & CoverageBB) && (CoverageFeatures & CoverageEdge))
+ D.Diag(clang::diag::err_drv_argument_not_allowed_with)
+ << "-fsanitize-coverage=bb"
+ << "-fsanitize-coverage=edge";
+ // Basic block tracing and 8-bit counters require some type of coverage
+ // enabled.
+ if (CoverageFeatures & CoverageTraceBB)
+ D.Diag(clang::diag::warn_drv_deprecated_arg)
+ << "-fsanitize-coverage=trace-bb"
+ << "-fsanitize-coverage=trace-pc-guard";
+ if (CoverageFeatures & Coverage8bitCounters)
+ D.Diag(clang::diag::warn_drv_deprecated_arg)
+ << "-fsanitize-coverage=8bit-counters"
+ << "-fsanitize-coverage=trace-pc-guard";
+
+ int InsertionPointTypes = CoverageFunc | CoverageBB | CoverageEdge;
+ int InstrumentationTypes =
+ CoverageTracePC | CoverageTracePCGuard | CoverageInline8bitCounters;
+ if ((CoverageFeatures & InsertionPointTypes) &&
+ !(CoverageFeatures & InstrumentationTypes)) {
+ D.Diag(clang::diag::warn_drv_deprecated_arg)
+ << "-fsanitize-coverage=[func|bb|edge]"
+ << "-fsanitize-coverage=[func|bb|edge],[trace-pc-guard|trace-pc]";
+ }
+
+ // trace-pc w/o func/bb/edge implies edge.
+ if (!(CoverageFeatures & InsertionPointTypes)) {
+ if (CoverageFeatures &
+ (CoverageTracePC | CoverageTracePCGuard | CoverageInline8bitCounters))
+ CoverageFeatures |= CoverageEdge;
+
+ if (CoverageFeatures & CoverageStackDepth)
+ CoverageFeatures |= CoverageFunc;
+ }
+
+ SharedRuntime =
+ Args.hasFlag(options::OPT_shared_libsan, options::OPT_static_libsan,
+ TC.getTriple().isAndroid() || TC.getTriple().isOSFuchsia() ||
+ TC.getTriple().isOSDarwin());
+
+ ImplicitCfiRuntime = TC.getTriple().isAndroid();
+
+ if (AllAddedKinds & Address) {
+ NeedPIE |= TC.getTriple().isOSFuchsia();
+ if (Arg *A =
+ Args.getLastArg(options::OPT_fsanitize_address_field_padding)) {
+ StringRef S = A->getValue();
+ // Legal values are 0 and 1, 2, but in future we may add more levels.
+ if (S.getAsInteger(0, AsanFieldPadding) || AsanFieldPadding < 0 ||
+ AsanFieldPadding > 2) {
+ D.Diag(clang::diag::err_drv_invalid_value) << A->getAsString(Args) << S;
+ }
+ }
+
+ if (Arg *WindowsDebugRTArg =
+ Args.getLastArg(options::OPT__SLASH_MTd, options::OPT__SLASH_MT,
+ options::OPT__SLASH_MDd, options::OPT__SLASH_MD,
+ options::OPT__SLASH_LDd, options::OPT__SLASH_LD)) {
+ switch (WindowsDebugRTArg->getOption().getID()) {
+ case options::OPT__SLASH_MTd:
+ case options::OPT__SLASH_MDd:
+ case options::OPT__SLASH_LDd:
+ D.Diag(clang::diag::err_drv_argument_not_allowed_with)
+ << WindowsDebugRTArg->getAsString(Args)
+ << lastArgumentForMask(D, Args, Address);
+ D.Diag(clang::diag::note_drv_address_sanitizer_debug_runtime);
+ }
+ }
+
+ AsanUseAfterScope = Args.hasFlag(
+ options::OPT_fsanitize_address_use_after_scope,
+ options::OPT_fno_sanitize_address_use_after_scope, AsanUseAfterScope);
+
+ AsanPoisonCustomArrayCookie = Args.hasFlag(
+ options::OPT_fsanitize_address_poison_custom_array_cookie,
+ options::OPT_fno_sanitize_address_poison_custom_array_cookie,
+ AsanPoisonCustomArrayCookie);
+
+ // As a workaround for a bug in gold 2.26 and earlier, dead stripping of
+ // globals in ASan is disabled by default on ELF targets.
+ // See https://sourceware.org/bugzilla/show_bug.cgi?id=19002
+ AsanGlobalsDeadStripping =
+ !TC.getTriple().isOSBinFormatELF() || TC.getTriple().isOSFuchsia() ||
+ Args.hasArg(options::OPT_fsanitize_address_globals_dead_stripping);
+
+ AsanUseOdrIndicator =
+ Args.hasFlag(options::OPT_fsanitize_address_use_odr_indicator,
+ options::OPT_fno_sanitize_address_use_odr_indicator,
+ AsanUseOdrIndicator);
+ } else {
+ AsanUseAfterScope = false;
+ }
+
+ if (AllAddedKinds & HWAddress) {
+ if (Arg *HwasanAbiArg =
+ Args.getLastArg(options::OPT_fsanitize_hwaddress_abi_EQ)) {
+ HwasanAbi = HwasanAbiArg->getValue();
+ if (HwasanAbi != "platform" && HwasanAbi != "interceptor")
+ D.Diag(clang::diag::err_drv_invalid_value)
+ << HwasanAbiArg->getAsString(Args) << HwasanAbi;
+ } else {
+ HwasanAbi = "interceptor";
+ }
+ }
+
+ if (AllAddedKinds & SafeStack) {
+ // SafeStack runtime is built into the system on Fuchsia.
+ SafeStackRuntime = !TC.getTriple().isOSFuchsia();
+ }
+
+ // Parse -link-cxx-sanitizer flag.
+ LinkCXXRuntimes =
+ Args.hasArg(options::OPT_fsanitize_link_cxx_runtime) || D.CCCIsCXX();
+
+ // Finally, initialize the set of available and recoverable sanitizers.
+ Sanitizers.Mask |= Kinds;
+ RecoverableSanitizers.Mask |= RecoverableKinds;
+ TrapSanitizers.Mask |= TrappingKinds;
+ assert(!(RecoverableKinds & TrappingKinds) &&
+ "Overlap between recoverable and trapping sanitizers");
+}
+
+static std::string toString(const clang::SanitizerSet &Sanitizers) {
+ std::string Res;
+#define SANITIZER(NAME, ID) \
+ if (Sanitizers.has(ID)) { \
+ if (!Res.empty()) \
+ Res += ","; \
+ Res += NAME; \
+ }
+#include "clang/Basic/Sanitizers.def"
+ return Res;
+}
+
+static void addIncludeLinkerOption(const ToolChain &TC,
+ const llvm::opt::ArgList &Args,
+ llvm::opt::ArgStringList &CmdArgs,
+ StringRef SymbolName) {
+ SmallString<64> LinkerOptionFlag;
+ LinkerOptionFlag = "--linker-option=/include:";
+ if (TC.getTriple().getArch() == llvm::Triple::x86) {
+ // Win32 mangles C function names with a '_' prefix.
+ LinkerOptionFlag += '_';
+ }
+ LinkerOptionFlag += SymbolName;
+ CmdArgs.push_back(Args.MakeArgString(LinkerOptionFlag));
+}
+
+void SanitizerArgs::addArgs(const ToolChain &TC, const llvm::opt::ArgList &Args,
+ llvm::opt::ArgStringList &CmdArgs,
+ types::ID InputType) const {
+ // NVPTX doesn't currently support sanitizers. Bailing out here means that
+ // e.g. -fsanitize=address applies only to host code, which is what we want
+ // for now.
+ if (TC.getTriple().isNVPTX())
+ return;
+
+ // Translate available CoverageFeatures to corresponding clang-cc1 flags.
+ // Do it even if Sanitizers.empty() since some forms of coverage don't require
+ // sanitizers.
+ std::pair<int, const char *> CoverageFlags[] = {
+ std::make_pair(CoverageFunc, "-fsanitize-coverage-type=1"),
+ std::make_pair(CoverageBB, "-fsanitize-coverage-type=2"),
+ std::make_pair(CoverageEdge, "-fsanitize-coverage-type=3"),
+ std::make_pair(CoverageIndirCall, "-fsanitize-coverage-indirect-calls"),
+ std::make_pair(CoverageTraceBB, "-fsanitize-coverage-trace-bb"),
+ std::make_pair(CoverageTraceCmp, "-fsanitize-coverage-trace-cmp"),
+ std::make_pair(CoverageTraceDiv, "-fsanitize-coverage-trace-div"),
+ std::make_pair(CoverageTraceGep, "-fsanitize-coverage-trace-gep"),
+ std::make_pair(Coverage8bitCounters, "-fsanitize-coverage-8bit-counters"),
+ std::make_pair(CoverageTracePC, "-fsanitize-coverage-trace-pc"),
+ std::make_pair(CoverageTracePCGuard, "-fsanitize-coverage-trace-pc-guard"),
+ std::make_pair(CoverageInline8bitCounters, "-fsanitize-coverage-inline-8bit-counters"),
+ std::make_pair(CoveragePCTable, "-fsanitize-coverage-pc-table"),
+ std::make_pair(CoverageNoPrune, "-fsanitize-coverage-no-prune"),
+ std::make_pair(CoverageStackDepth, "-fsanitize-coverage-stack-depth")};
+ for (auto F : CoverageFlags) {
+ if (CoverageFeatures & F.first)
+ CmdArgs.push_back(F.second);
+ }
+
+ if (TC.getTriple().isOSWindows() && needsUbsanRt()) {
+ // Instruct the code generator to embed linker directives in the object file
+ // that cause the required runtime libraries to be linked.
+ CmdArgs.push_back(Args.MakeArgString(
+ "--dependent-lib=" + TC.getCompilerRT(Args, "ubsan_standalone")));
+ if (types::isCXX(InputType))
+ CmdArgs.push_back(Args.MakeArgString(
+ "--dependent-lib=" + TC.getCompilerRT(Args, "ubsan_standalone_cxx")));
+ }
+ if (TC.getTriple().isOSWindows() && needsStatsRt()) {
+ CmdArgs.push_back(Args.MakeArgString("--dependent-lib=" +
+ TC.getCompilerRT(Args, "stats_client")));
+
+ // The main executable must export the stats runtime.
+ // FIXME: Only exporting from the main executable (e.g. based on whether the
+ // translation unit defines main()) would save a little space, but having
+ // multiple copies of the runtime shouldn't hurt.
+ CmdArgs.push_back(Args.MakeArgString("--dependent-lib=" +
+ TC.getCompilerRT(Args, "stats")));
+ addIncludeLinkerOption(TC, Args, CmdArgs, "__sanitizer_stats_register");
+ }
+
+ if (Sanitizers.empty())
+ return;
+ CmdArgs.push_back(Args.MakeArgString("-fsanitize=" + toString(Sanitizers)));
+
+ if (!RecoverableSanitizers.empty())
+ CmdArgs.push_back(Args.MakeArgString("-fsanitize-recover=" +
+ toString(RecoverableSanitizers)));
+
+ if (!TrapSanitizers.empty())
+ CmdArgs.push_back(
+ Args.MakeArgString("-fsanitize-trap=" + toString(TrapSanitizers)));
+
+ for (const auto &BLPath : BlacklistFiles) {
+ SmallString<64> BlacklistOpt("-fsanitize-blacklist=");
+ BlacklistOpt += BLPath;
+ CmdArgs.push_back(Args.MakeArgString(BlacklistOpt));
+ }
+ for (const auto &Dep : ExtraDeps) {
+ SmallString<64> ExtraDepOpt("-fdepfile-entry=");
+ ExtraDepOpt += Dep;
+ CmdArgs.push_back(Args.MakeArgString(ExtraDepOpt));
+ }
+
+ if (MsanTrackOrigins)
+ CmdArgs.push_back(Args.MakeArgString("-fsanitize-memory-track-origins=" +
+ Twine(MsanTrackOrigins)));
+
+ if (MsanUseAfterDtor)
+ CmdArgs.push_back("-fsanitize-memory-use-after-dtor");
+
+ // FIXME: Pass these parameters as function attributes, not as -llvm flags.
+ if (!TsanMemoryAccess) {
+ CmdArgs.push_back("-mllvm");
+ CmdArgs.push_back("-tsan-instrument-memory-accesses=0");
+ CmdArgs.push_back("-mllvm");
+ CmdArgs.push_back("-tsan-instrument-memintrinsics=0");
+ }
+ if (!TsanFuncEntryExit) {
+ CmdArgs.push_back("-mllvm");
+ CmdArgs.push_back("-tsan-instrument-func-entry-exit=0");
+ }
+ if (!TsanAtomics) {
+ CmdArgs.push_back("-mllvm");
+ CmdArgs.push_back("-tsan-instrument-atomics=0");
+ }
+
+ if (CfiCrossDso)
+ CmdArgs.push_back("-fsanitize-cfi-cross-dso");
+
+ if (CfiICallGeneralizePointers)
+ CmdArgs.push_back("-fsanitize-cfi-icall-generalize-pointers");
+
+ if (Stats)
+ CmdArgs.push_back("-fsanitize-stats");
+
+ if (MinimalRuntime)
+ CmdArgs.push_back("-fsanitize-minimal-runtime");
+
+ if (AsanFieldPadding)
+ CmdArgs.push_back(Args.MakeArgString("-fsanitize-address-field-padding=" +
+ Twine(AsanFieldPadding)));
+
+ if (AsanUseAfterScope)
+ CmdArgs.push_back("-fsanitize-address-use-after-scope");
+
+ if (AsanPoisonCustomArrayCookie)
+ CmdArgs.push_back("-fsanitize-address-poison-custom-array-cookie");
+
+ if (AsanGlobalsDeadStripping)
+ CmdArgs.push_back("-fsanitize-address-globals-dead-stripping");
+
+ if (AsanUseOdrIndicator)
+ CmdArgs.push_back("-fsanitize-address-use-odr-indicator");
+
+ if (!HwasanAbi.empty()) {
+ CmdArgs.push_back("-default-function-attr");
+ CmdArgs.push_back(Args.MakeArgString("hwasan-abi=" + HwasanAbi));
+ }
+
+ // MSan: Workaround for PR16386.
+ // ASan: This is mainly to help LSan with cases such as
+ // https://github.com/google/sanitizers/issues/373
+ // We can't make this conditional on -fsanitize=leak, as that flag shouldn't
+ // affect compilation.
+ if (Sanitizers.has(Memory) || Sanitizers.has(Address))
+ CmdArgs.push_back("-fno-assume-sane-operator-new");
+
+ // Require -fvisibility= flag on non-Windows when compiling if vptr CFI is
+ // enabled.
+ if (Sanitizers.hasOneOf(CFIClasses) && !TC.getTriple().isOSWindows() &&
+ !Args.hasArg(options::OPT_fvisibility_EQ)) {
+ TC.getDriver().Diag(clang::diag::err_drv_argument_only_allowed_with)
+ << lastArgumentForMask(TC.getDriver(), Args,
+ Sanitizers.Mask & CFIClasses)
+ << "-fvisibility=";
+ }
+}
+
+SanitizerMask parseArgValues(const Driver &D, const llvm::opt::Arg *A,
+ bool DiagnoseErrors) {
+ assert((A->getOption().matches(options::OPT_fsanitize_EQ) ||
+ A->getOption().matches(options::OPT_fno_sanitize_EQ) ||
+ A->getOption().matches(options::OPT_fsanitize_recover_EQ) ||
+ A->getOption().matches(options::OPT_fno_sanitize_recover_EQ) ||
+ A->getOption().matches(options::OPT_fsanitize_trap_EQ) ||
+ A->getOption().matches(options::OPT_fno_sanitize_trap_EQ)) &&
+ "Invalid argument in parseArgValues!");
+ SanitizerMask Kinds = 0;
+ for (int i = 0, n = A->getNumValues(); i != n; ++i) {
+ const char *Value = A->getValue(i);
+ SanitizerMask Kind;
+ // Special case: don't accept -fsanitize=all.
+ if (A->getOption().matches(options::OPT_fsanitize_EQ) &&
+ 0 == strcmp("all", Value))
+ Kind = 0;
+ // Similarly, don't accept -fsanitize=efficiency-all.
+ else if (A->getOption().matches(options::OPT_fsanitize_EQ) &&
+ 0 == strcmp("efficiency-all", Value))
+ Kind = 0;
+ else
+ Kind = parseSanitizerValue(Value, /*AllowGroups=*/true);
+
+ if (Kind)
+ Kinds |= Kind;
+ else if (DiagnoseErrors)
+ D.Diag(clang::diag::err_drv_unsupported_option_argument)
+ << A->getOption().getName() << Value;
+ }
+ return Kinds;
+}
+
+int parseCoverageFeatures(const Driver &D, const llvm::opt::Arg *A) {
+ assert(A->getOption().matches(options::OPT_fsanitize_coverage) ||
+ A->getOption().matches(options::OPT_fno_sanitize_coverage));
+ int Features = 0;
+ for (int i = 0, n = A->getNumValues(); i != n; ++i) {
+ const char *Value = A->getValue(i);
+ int F = llvm::StringSwitch<int>(Value)
+ .Case("func", CoverageFunc)
+ .Case("bb", CoverageBB)
+ .Case("edge", CoverageEdge)
+ .Case("indirect-calls", CoverageIndirCall)
+ .Case("trace-bb", CoverageTraceBB)
+ .Case("trace-cmp", CoverageTraceCmp)
+ .Case("trace-div", CoverageTraceDiv)
+ .Case("trace-gep", CoverageTraceGep)
+ .Case("8bit-counters", Coverage8bitCounters)
+ .Case("trace-pc", CoverageTracePC)
+ .Case("trace-pc-guard", CoverageTracePCGuard)
+ .Case("no-prune", CoverageNoPrune)
+ .Case("inline-8bit-counters", CoverageInline8bitCounters)
+ .Case("pc-table", CoveragePCTable)
+ .Case("stack-depth", CoverageStackDepth)
+ .Default(0);
+ if (F == 0)
+ D.Diag(clang::diag::err_drv_unsupported_option_argument)
+ << A->getOption().getName() << Value;
+ Features |= F;
+ }
+ return Features;
+}
+
+std::string lastArgumentForMask(const Driver &D, const llvm::opt::ArgList &Args,
+ SanitizerMask Mask) {
+ for (llvm::opt::ArgList::const_reverse_iterator I = Args.rbegin(),
+ E = Args.rend();
+ I != E; ++I) {
+ const auto *Arg = *I;
+ if (Arg->getOption().matches(options::OPT_fsanitize_EQ)) {
+ SanitizerMask AddKinds =
+ expandSanitizerGroups(parseArgValues(D, Arg, false));
+ if (AddKinds & Mask)
+ return describeSanitizeArg(Arg, Mask);
+ } else if (Arg->getOption().matches(options::OPT_fno_sanitize_EQ)) {
+ SanitizerMask RemoveKinds =
+ expandSanitizerGroups(parseArgValues(D, Arg, false));
+ Mask &= ~RemoveKinds;
+ }
+ }
+ llvm_unreachable("arg list didn't provide expected value");
+}
+
+std::string describeSanitizeArg(const llvm::opt::Arg *A, SanitizerMask Mask) {
+ assert(A->getOption().matches(options::OPT_fsanitize_EQ)
+ && "Invalid argument in describeSanitizerArg!");
+
+ std::string Sanitizers;
+ for (int i = 0, n = A->getNumValues(); i != n; ++i) {
+ if (expandSanitizerGroups(
+ parseSanitizerValue(A->getValue(i), /*AllowGroups=*/true)) &
+ Mask) {
+ if (!Sanitizers.empty())
+ Sanitizers += ",";
+ Sanitizers += A->getValue(i);
+ }
+ }
+
+ assert(!Sanitizers.empty() && "arg didn't provide expected value");
+ return "-fsanitize=" + Sanitizers;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-04 00:08:34 +0000