forked from OSchip/llvm-project
810 lines
33 KiB
C++
810 lines
33 KiB
C++
//===--- SanitizerArgs.cpp - Arguments for sanitizer tools ---------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Driver/SanitizerArgs.h"
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#include "Tools.h"
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#include "clang/Basic/Sanitizers.h"
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#include "clang/Driver/Driver.h"
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#include "clang/Driver/DriverDiagnostic.h"
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#include "clang/Driver/Options.h"
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#include "clang/Driver/ToolChain.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/SpecialCaseList.h"
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#include <memory>
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using namespace clang;
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using namespace clang::SanitizerKind;
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using namespace clang::driver;
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using namespace llvm::opt;
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enum : SanitizerMask {
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NeedsUbsanRt = Undefined | Integer | CFI,
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NeedsUbsanCxxRt = Vptr | CFI,
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NotAllowedWithTrap = Vptr,
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RequiresPIE = DataFlow,
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NeedsUnwindTables = Address | Thread | Memory | DataFlow,
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SupportsCoverage = Address | Memory | Leak | Undefined | Integer | DataFlow,
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RecoverableByDefault = Undefined | Integer,
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Unrecoverable = Unreachable | Return,
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LegacyFsanitizeRecoverMask = Undefined | Integer,
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NeedsLTO = CFI,
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TrappingSupported =
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(Undefined & ~Vptr) | UnsignedIntegerOverflow | LocalBounds | CFI,
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TrappingDefault = CFI,
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CFIClasses = CFIVCall | CFINVCall | CFIDerivedCast | CFIUnrelatedCast,
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};
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enum CoverageFeature {
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CoverageFunc = 1 << 0,
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CoverageBB = 1 << 1,
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CoverageEdge = 1 << 2,
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CoverageIndirCall = 1 << 3,
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CoverageTraceBB = 1 << 4,
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CoverageTraceCmp = 1 << 5,
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CoverageTraceDiv = 1 << 6,
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CoverageTraceGep = 1 << 7,
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Coverage8bitCounters = 1 << 8,
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CoverageTracePC = 1 << 9,
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};
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/// Parse a -fsanitize= or -fno-sanitize= argument's values, diagnosing any
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/// invalid components. Returns a SanitizerMask.
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static SanitizerMask parseArgValues(const Driver &D, const llvm::opt::Arg *A,
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bool DiagnoseErrors);
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/// Parse -f(no-)?sanitize-coverage= flag values, diagnosing any invalid
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/// components. Returns OR of members of \c CoverageFeature enumeration.
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static int parseCoverageFeatures(const Driver &D, const llvm::opt::Arg *A);
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/// Produce an argument string from ArgList \p Args, which shows how it
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/// provides some sanitizer kind from \p Mask. For example, the argument list
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/// "-fsanitize=thread,vptr -fsanitize=address" with mask \c NeedsUbsanRt
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/// would produce "-fsanitize=vptr".
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static std::string lastArgumentForMask(const Driver &D,
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const llvm::opt::ArgList &Args,
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SanitizerMask Mask);
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/// Produce an argument string from argument \p A, which shows how it provides
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/// a value in \p Mask. For instance, the argument
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/// "-fsanitize=address,alignment" with mask \c NeedsUbsanRt would produce
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/// "-fsanitize=alignment".
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static std::string describeSanitizeArg(const llvm::opt::Arg *A,
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SanitizerMask Mask);
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/// Produce a string containing comma-separated names of sanitizers in \p
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/// Sanitizers set.
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static std::string toString(const clang::SanitizerSet &Sanitizers);
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static bool getDefaultBlacklist(const Driver &D, SanitizerMask Kinds,
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std::string &BLPath) {
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const char *BlacklistFile = nullptr;
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if (Kinds & Address)
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BlacklistFile = "asan_blacklist.txt";
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else if (Kinds & Memory)
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BlacklistFile = "msan_blacklist.txt";
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else if (Kinds & Thread)
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BlacklistFile = "tsan_blacklist.txt";
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else if (Kinds & DataFlow)
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BlacklistFile = "dfsan_abilist.txt";
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else if (Kinds & CFI)
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BlacklistFile = "cfi_blacklist.txt";
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if (BlacklistFile) {
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clang::SmallString<64> Path(D.ResourceDir);
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llvm::sys::path::append(Path, BlacklistFile);
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BLPath = Path.str();
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return true;
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}
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return false;
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}
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/// Sets group bits for every group that has at least one representative already
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/// enabled in \p Kinds.
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static SanitizerMask setGroupBits(SanitizerMask Kinds) {
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#define SANITIZER(NAME, ID)
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#define SANITIZER_GROUP(NAME, ID, ALIAS) \
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if (Kinds & SanitizerKind::ID) \
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Kinds |= SanitizerKind::ID##Group;
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#include "clang/Basic/Sanitizers.def"
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return Kinds;
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}
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static SanitizerMask parseSanitizeTrapArgs(const Driver &D,
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const llvm::opt::ArgList &Args) {
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SanitizerMask TrapRemove = 0; // During the loop below, the accumulated set of
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// sanitizers disabled by the current sanitizer
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// argument or any argument after it.
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SanitizerMask TrappingKinds = 0;
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SanitizerMask TrappingSupportedWithGroups = setGroupBits(TrappingSupported);
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for (ArgList::const_reverse_iterator I = Args.rbegin(), E = Args.rend();
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I != E; ++I) {
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const auto *Arg = *I;
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if (Arg->getOption().matches(options::OPT_fsanitize_trap_EQ)) {
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Arg->claim();
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SanitizerMask Add = parseArgValues(D, Arg, true);
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Add &= ~TrapRemove;
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if (SanitizerMask InvalidValues = Add & ~TrappingSupportedWithGroups) {
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SanitizerSet S;
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S.Mask = InvalidValues;
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D.Diag(diag::err_drv_unsupported_option_argument) << "-fsanitize-trap"
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<< toString(S);
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}
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TrappingKinds |= expandSanitizerGroups(Add) & ~TrapRemove;
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} else if (Arg->getOption().matches(options::OPT_fno_sanitize_trap_EQ)) {
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Arg->claim();
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TrapRemove |= expandSanitizerGroups(parseArgValues(D, Arg, true));
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} else if (Arg->getOption().matches(
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options::OPT_fsanitize_undefined_trap_on_error)) {
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Arg->claim();
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TrappingKinds |=
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expandSanitizerGroups(UndefinedGroup & ~TrapRemove) & ~TrapRemove;
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} else if (Arg->getOption().matches(
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options::OPT_fno_sanitize_undefined_trap_on_error)) {
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Arg->claim();
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TrapRemove |= expandSanitizerGroups(UndefinedGroup);
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}
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}
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// Apply default trapping behavior.
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TrappingKinds |= TrappingDefault & ~TrapRemove;
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return TrappingKinds;
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}
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bool SanitizerArgs::needsUbsanRt() const {
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return ((Sanitizers.Mask & NeedsUbsanRt & ~TrapSanitizers.Mask) ||
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CoverageFeatures) &&
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!Sanitizers.has(Address) && !Sanitizers.has(Memory) &&
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!Sanitizers.has(Thread) && !Sanitizers.has(DataFlow) && !CfiCrossDso;
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}
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bool SanitizerArgs::needsCfiRt() const {
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return !(Sanitizers.Mask & CFI & ~TrapSanitizers.Mask) && CfiCrossDso;
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}
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bool SanitizerArgs::needsCfiDiagRt() const {
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return (Sanitizers.Mask & CFI & ~TrapSanitizers.Mask) && CfiCrossDso;
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}
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bool SanitizerArgs::requiresPIE() const {
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return NeedPIE || (Sanitizers.Mask & RequiresPIE);
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}
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bool SanitizerArgs::needsUnwindTables() const {
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return Sanitizers.Mask & NeedsUnwindTables;
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}
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SanitizerArgs::SanitizerArgs(const ToolChain &TC,
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const llvm::opt::ArgList &Args) {
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SanitizerMask AllRemove = 0; // During the loop below, the accumulated set of
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// sanitizers disabled by the current sanitizer
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// argument or any argument after it.
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SanitizerMask AllAddedKinds = 0; // Mask of all sanitizers ever enabled by
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// -fsanitize= flags (directly or via group
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// expansion), some of which may be disabled
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// later. Used to carefully prune
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// unused-argument diagnostics.
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SanitizerMask DiagnosedKinds = 0; // All Kinds we have diagnosed up to now.
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// Used to deduplicate diagnostics.
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SanitizerMask Kinds = 0;
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const SanitizerMask Supported = setGroupBits(TC.getSupportedSanitizers());
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ToolChain::RTTIMode RTTIMode = TC.getRTTIMode();
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const Driver &D = TC.getDriver();
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SanitizerMask TrappingKinds = parseSanitizeTrapArgs(D, Args);
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SanitizerMask InvalidTrappingKinds = TrappingKinds & NotAllowedWithTrap;
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for (ArgList::const_reverse_iterator I = Args.rbegin(), E = Args.rend();
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I != E; ++I) {
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const auto *Arg = *I;
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if (Arg->getOption().matches(options::OPT_fsanitize_EQ)) {
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Arg->claim();
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SanitizerMask Add = parseArgValues(D, Arg, true);
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AllAddedKinds |= expandSanitizerGroups(Add);
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// Avoid diagnosing any sanitizer which is disabled later.
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Add &= ~AllRemove;
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// At this point we have not expanded groups, so any unsupported
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// sanitizers in Add are those which have been explicitly enabled.
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// Diagnose them.
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if (SanitizerMask KindsToDiagnose =
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Add & InvalidTrappingKinds & ~DiagnosedKinds) {
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std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
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D.Diag(diag::err_drv_argument_not_allowed_with)
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<< Desc << "-fsanitize-trap=undefined";
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DiagnosedKinds |= KindsToDiagnose;
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}
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Add &= ~InvalidTrappingKinds;
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if (SanitizerMask KindsToDiagnose = Add & ~Supported & ~DiagnosedKinds) {
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std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
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D.Diag(diag::err_drv_unsupported_opt_for_target)
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<< Desc << TC.getTriple().str();
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DiagnosedKinds |= KindsToDiagnose;
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}
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Add &= Supported;
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// Test for -fno-rtti + explicit -fsanitizer=vptr before expanding groups
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// so we don't error out if -fno-rtti and -fsanitize=undefined were
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// passed.
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if (Add & Vptr &&
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(RTTIMode == ToolChain::RM_DisabledImplicitly ||
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RTTIMode == ToolChain::RM_DisabledExplicitly)) {
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if (RTTIMode == ToolChain::RM_DisabledImplicitly)
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// Warn about not having rtti enabled if the vptr sanitizer is
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// explicitly enabled
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D.Diag(diag::warn_drv_disabling_vptr_no_rtti_default);
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else {
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const llvm::opt::Arg *NoRTTIArg = TC.getRTTIArg();
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assert(NoRTTIArg &&
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"RTTI disabled explicitly but we have no argument!");
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D.Diag(diag::err_drv_argument_not_allowed_with)
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<< "-fsanitize=vptr" << NoRTTIArg->getAsString(Args);
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}
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// Take out the Vptr sanitizer from the enabled sanitizers
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AllRemove |= Vptr;
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}
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Add = expandSanitizerGroups(Add);
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// Group expansion may have enabled a sanitizer which is disabled later.
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Add &= ~AllRemove;
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// Silently discard any unsupported sanitizers implicitly enabled through
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// group expansion.
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Add &= ~InvalidTrappingKinds;
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Add &= Supported;
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Kinds |= Add;
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} else if (Arg->getOption().matches(options::OPT_fno_sanitize_EQ)) {
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Arg->claim();
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SanitizerMask Remove = parseArgValues(D, Arg, true);
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AllRemove |= expandSanitizerGroups(Remove);
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}
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}
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// Enable toolchain specific default sanitizers if not explicitly disabled.
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Kinds |= TC.getDefaultSanitizers() & ~AllRemove;
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// We disable the vptr sanitizer if it was enabled by group expansion but RTTI
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// is disabled.
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if ((Kinds & Vptr) &&
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(RTTIMode == ToolChain::RM_DisabledImplicitly ||
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RTTIMode == ToolChain::RM_DisabledExplicitly)) {
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Kinds &= ~Vptr;
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}
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// Check that LTO is enabled if we need it.
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if ((Kinds & NeedsLTO) && !D.isUsingLTO()) {
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D.Diag(diag::err_drv_argument_only_allowed_with)
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<< lastArgumentForMask(D, Args, Kinds & NeedsLTO) << "-flto";
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}
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// Report error if there are non-trapping sanitizers that require
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// c++abi-specific parts of UBSan runtime, and they are not provided by the
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// toolchain. We don't have a good way to check the latter, so we just
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// check if the toolchan supports vptr.
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if (~Supported & Vptr) {
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SanitizerMask KindsToDiagnose = Kinds & ~TrappingKinds & NeedsUbsanCxxRt;
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// The runtime library supports the Microsoft C++ ABI, but only well enough
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// for CFI. FIXME: Remove this once we support vptr on Windows.
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if (TC.getTriple().isOSWindows())
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KindsToDiagnose &= ~CFI;
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if (KindsToDiagnose) {
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SanitizerSet S;
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S.Mask = KindsToDiagnose;
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D.Diag(diag::err_drv_unsupported_opt_for_target)
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<< ("-fno-sanitize-trap=" + toString(S)) << TC.getTriple().str();
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Kinds &= ~KindsToDiagnose;
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}
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}
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// Warn about incompatible groups of sanitizers.
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std::pair<SanitizerMask, SanitizerMask> IncompatibleGroups[] = {
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std::make_pair(Address, Thread), std::make_pair(Address, Memory),
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std::make_pair(Thread, Memory), std::make_pair(Leak, Thread),
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std::make_pair(Leak, Memory), std::make_pair(KernelAddress, Address),
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std::make_pair(KernelAddress, Leak),
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std::make_pair(KernelAddress, Thread),
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std::make_pair(KernelAddress, Memory),
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std::make_pair(Efficiency, Address),
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std::make_pair(Efficiency, Leak),
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std::make_pair(Efficiency, Thread),
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std::make_pair(Efficiency, Memory),
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std::make_pair(Efficiency, KernelAddress)};
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for (auto G : IncompatibleGroups) {
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SanitizerMask Group = G.first;
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if (Kinds & Group) {
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if (SanitizerMask Incompatible = Kinds & G.second) {
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D.Diag(clang::diag::err_drv_argument_not_allowed_with)
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<< lastArgumentForMask(D, Args, Group)
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<< lastArgumentForMask(D, Args, Incompatible);
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Kinds &= ~Incompatible;
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}
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}
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}
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// FIXME: Currently -fsanitize=leak is silently ignored in the presence of
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// -fsanitize=address. Perhaps it should print an error, or perhaps
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// -f(-no)sanitize=leak should change whether leak detection is enabled by
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// default in ASan?
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// Parse -f(no-)?sanitize-recover flags.
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SanitizerMask RecoverableKinds = RecoverableByDefault;
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SanitizerMask DiagnosedUnrecoverableKinds = 0;
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for (const auto *Arg : Args) {
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const char *DeprecatedReplacement = nullptr;
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if (Arg->getOption().matches(options::OPT_fsanitize_recover)) {
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DeprecatedReplacement =
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"-fsanitize-recover=undefined,integer' or '-fsanitize-recover=all";
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RecoverableKinds |= expandSanitizerGroups(LegacyFsanitizeRecoverMask);
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Arg->claim();
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} else if (Arg->getOption().matches(options::OPT_fno_sanitize_recover)) {
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DeprecatedReplacement = "-fno-sanitize-recover=undefined,integer' or "
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"'-fno-sanitize-recover=all";
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RecoverableKinds &= ~expandSanitizerGroups(LegacyFsanitizeRecoverMask);
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Arg->claim();
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} else if (Arg->getOption().matches(options::OPT_fsanitize_recover_EQ)) {
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SanitizerMask Add = parseArgValues(D, Arg, true);
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// Report error if user explicitly tries to recover from unrecoverable
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// sanitizer.
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if (SanitizerMask KindsToDiagnose =
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Add & Unrecoverable & ~DiagnosedUnrecoverableKinds) {
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SanitizerSet SetToDiagnose;
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SetToDiagnose.Mask |= KindsToDiagnose;
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D.Diag(diag::err_drv_unsupported_option_argument)
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<< Arg->getOption().getName() << toString(SetToDiagnose);
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DiagnosedUnrecoverableKinds |= KindsToDiagnose;
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}
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RecoverableKinds |= expandSanitizerGroups(Add);
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Arg->claim();
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} else if (Arg->getOption().matches(options::OPT_fno_sanitize_recover_EQ)) {
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RecoverableKinds &= ~expandSanitizerGroups(parseArgValues(D, Arg, true));
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Arg->claim();
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}
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if (DeprecatedReplacement) {
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D.Diag(diag::warn_drv_deprecated_arg) << Arg->getAsString(Args)
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<< DeprecatedReplacement;
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}
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}
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RecoverableKinds &= Kinds;
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RecoverableKinds &= ~Unrecoverable;
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TrappingKinds &= Kinds;
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// Setup blacklist files.
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// Add default blacklist from resource directory.
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{
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std::string BLPath;
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if (getDefaultBlacklist(D, Kinds, BLPath) && llvm::sys::fs::exists(BLPath))
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BlacklistFiles.push_back(BLPath);
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}
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// Parse -f(no-)sanitize-blacklist options.
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for (const auto *Arg : Args) {
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if (Arg->getOption().matches(options::OPT_fsanitize_blacklist)) {
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Arg->claim();
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std::string BLPath = Arg->getValue();
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if (llvm::sys::fs::exists(BLPath)) {
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BlacklistFiles.push_back(BLPath);
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ExtraDeps.push_back(BLPath);
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} else
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D.Diag(clang::diag::err_drv_no_such_file) << BLPath;
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} else if (Arg->getOption().matches(options::OPT_fno_sanitize_blacklist)) {
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Arg->claim();
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BlacklistFiles.clear();
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ExtraDeps.clear();
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}
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}
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// Validate blacklists format.
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{
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std::string BLError;
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std::unique_ptr<llvm::SpecialCaseList> SCL(
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llvm::SpecialCaseList::create(BlacklistFiles, BLError));
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if (!SCL.get())
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D.Diag(clang::diag::err_drv_malformed_sanitizer_blacklist) << BLError;
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}
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// Parse -f[no-]sanitize-memory-track-origins[=level] options.
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if (AllAddedKinds & Memory) {
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if (Arg *A =
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Args.getLastArg(options::OPT_fsanitize_memory_track_origins_EQ,
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options::OPT_fsanitize_memory_track_origins,
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options::OPT_fno_sanitize_memory_track_origins)) {
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if (A->getOption().matches(options::OPT_fsanitize_memory_track_origins)) {
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MsanTrackOrigins = 2;
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} else if (A->getOption().matches(
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options::OPT_fno_sanitize_memory_track_origins)) {
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MsanTrackOrigins = 0;
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} else {
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StringRef S = A->getValue();
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if (S.getAsInteger(0, MsanTrackOrigins) || MsanTrackOrigins < 0 ||
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MsanTrackOrigins > 2) {
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D.Diag(clang::diag::err_drv_invalid_value) << A->getAsString(Args) << S;
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}
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}
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}
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MsanUseAfterDtor =
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Args.hasArg(options::OPT_fsanitize_memory_use_after_dtor);
|
|
NeedPIE |= !(TC.getTriple().isOSLinux() &&
|
|
TC.getTriple().getArch() == llvm::Triple::x86_64);
|
|
}
|
|
|
|
if (AllAddedKinds & CFI) {
|
|
CfiCrossDso = Args.hasFlag(options::OPT_fsanitize_cfi_cross_dso,
|
|
options::OPT_fno_sanitize_cfi_cross_dso, false);
|
|
// Without PIE, external function address may resolve to a PLT record, which
|
|
// can not be verified by the target module.
|
|
NeedPIE |= CfiCrossDso;
|
|
}
|
|
|
|
Stats = Args.hasFlag(options::OPT_fsanitize_stats,
|
|
options::OPT_fno_sanitize_stats, false);
|
|
|
|
// 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) &&
|
|
LegacySanitizeCoverage >= 0 && LegacySanitizeCoverage <= 4) {
|
|
switch (LegacySanitizeCoverage) {
|
|
case 0:
|
|
CoverageFeatures = 0;
|
|
Arg->claim();
|
|
break;
|
|
case 1:
|
|
D.Diag(diag::warn_drv_deprecated_arg) << Arg->getAsString(Args)
|
|
<< "-fsanitize-coverage=func";
|
|
CoverageFeatures = CoverageFunc;
|
|
break;
|
|
case 2:
|
|
D.Diag(diag::warn_drv_deprecated_arg) << Arg->getAsString(Args)
|
|
<< "-fsanitize-coverage=bb";
|
|
CoverageFeatures = CoverageBB;
|
|
break;
|
|
case 3:
|
|
D.Diag(diag::warn_drv_deprecated_arg) << Arg->getAsString(Args)
|
|
<< "-fsanitize-coverage=edge";
|
|
CoverageFeatures = CoverageEdge;
|
|
break;
|
|
case 4:
|
|
D.Diag(diag::warn_drv_deprecated_arg)
|
|
<< Arg->getAsString(Args)
|
|
<< "-fsanitize-coverage=edge,indirect-calls";
|
|
CoverageFeatures = CoverageEdge | CoverageIndirCall;
|
|
break;
|
|
}
|
|
continue;
|
|
}
|
|
CoverageFeatures |= parseCoverageFeatures(D, Arg);
|
|
|
|
// Disable coverage and not claim the flags if there is at least one
|
|
// non-supporting sanitizer.
|
|
if (!(AllAddedKinds & ~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.
|
|
int CoverageTypes = CoverageFunc | CoverageBB | CoverageEdge;
|
|
if ((CoverageFeatures & CoverageTraceBB) &&
|
|
!(CoverageFeatures & CoverageTypes))
|
|
D.Diag(clang::diag::err_drv_argument_only_allowed_with)
|
|
<< "-fsanitize-coverage=trace-bb"
|
|
<< "-fsanitize-coverage=(func|bb|edge)";
|
|
if ((CoverageFeatures & Coverage8bitCounters) &&
|
|
!(CoverageFeatures & CoverageTypes))
|
|
D.Diag(clang::diag::err_drv_argument_only_allowed_with)
|
|
<< "-fsanitize-coverage=8bit-counters"
|
|
<< "-fsanitize-coverage=(func|bb|edge)";
|
|
// trace-pc w/o func/bb/edge implies edge.
|
|
if ((CoverageFeatures & CoverageTracePC) &&
|
|
!(CoverageFeatures & CoverageTypes))
|
|
CoverageFeatures |= CoverageEdge;
|
|
|
|
if (AllAddedKinds & Address) {
|
|
AsanSharedRuntime =
|
|
Args.hasArg(options::OPT_shared_libasan) || TC.getTriple().isAndroid();
|
|
NeedPIE |= TC.getTriple().isAndroid();
|
|
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.hasArg(options::OPT_fsanitize_address_use_after_scope);
|
|
if (AsanUseAfterScope && !(AllAddedKinds & Address)) {
|
|
D.Diag(clang::diag::err_drv_argument_only_allowed_with)
|
|
<< "-fsanitize-address-use-after-scope"
|
|
<< "-fsanitize=address";
|
|
}
|
|
|
|
// 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;
|
|
}
|
|
|
|
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 {
|
|
// 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")};
|
|
for (auto F : CoverageFlags) {
|
|
if (CoverageFeatures & F.first)
|
|
CmdArgs.push_back(Args.MakeArgString(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=" +
|
|
llvm::utostr(MsanTrackOrigins)));
|
|
|
|
if (MsanUseAfterDtor)
|
|
CmdArgs.push_back(Args.MakeArgString("-fsanitize-memory-use-after-dtor"));
|
|
|
|
if (CfiCrossDso)
|
|
CmdArgs.push_back(Args.MakeArgString("-fsanitize-cfi-cross-dso"));
|
|
|
|
if (Stats)
|
|
CmdArgs.push_back(Args.MakeArgString("-fsanitize-stats"));
|
|
|
|
if (AsanFieldPadding)
|
|
CmdArgs.push_back(Args.MakeArgString("-fsanitize-address-field-padding=" +
|
|
llvm::utostr(AsanFieldPadding)));
|
|
|
|
if (AsanUseAfterScope)
|
|
CmdArgs.push_back(Args.MakeArgString("-fsanitize-address-use-after-scope"));
|
|
|
|
// MSan: Workaround for PR16386.
|
|
// ASan: This is mainly to help LSan with cases such as
|
|
// https://code.google.com/p/address-sanitizer/issues/detail?id=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(Args.MakeArgString("-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)
|
|
.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;
|
|
}
|