clang  8.0.0
SanitizerArgs.cpp
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1 //===--- SanitizerArgs.cpp - Arguments for sanitizer tools ---------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
10 #include "ToolChains/CommonArgs.h"
11 #include "clang/Basic/Sanitizers.h"
12 #include "clang/Driver/Driver.h"
14 #include "clang/Driver/Options.h"
15 #include "clang/Driver/ToolChain.h"
16 #include "llvm/ADT/StringExtras.h"
17 #include "llvm/ADT/StringSwitch.h"
18 #include "llvm/Support/FileSystem.h"
19 #include "llvm/Support/Path.h"
20 #include "llvm/Support/SpecialCaseList.h"
21 #include "llvm/Support/TargetParser.h"
22 #include <memory>
23 
24 using namespace clang;
25 using namespace clang::SanitizerKind;
26 using namespace clang::driver;
27 using namespace llvm::opt;
28 
29 enum : SanitizerMask {
30  NeedsUbsanRt = Undefined | Integer | ImplicitConversion | Nullability | CFI,
31  NeedsUbsanCxxRt = Vptr | CFI,
34  RequiresPIE = DataFlow | HWAddress | Scudo,
35  NeedsUnwindTables = Address | HWAddress | Thread | Memory | DataFlow,
36  SupportsCoverage = Address | HWAddress | KernelAddress | KernelHWAddress |
37  Memory | KernelMemory | Leak | Undefined | Integer |
38  ImplicitConversion | Nullability | DataFlow | Fuzzer |
39  FuzzerNoLink,
40  RecoverableByDefault = Undefined | Integer | ImplicitConversion | Nullability,
41  Unrecoverable = Unreachable | Return,
42  AlwaysRecoverable = KernelAddress | KernelHWAddress,
44  NeedsLTO = CFI,
45  TrappingSupported = (Undefined & ~Vptr) | UnsignedIntegerOverflow |
46  ImplicitConversion | Nullability | LocalBounds | CFI,
49  CFIVCall | CFINVCall | CFIMFCall | CFIDerivedCast | CFIUnrelatedCast,
50  CompatibleWithMinimalRuntime = TrappingSupported | Scudo | ShadowCallStack,
51 };
52 
54  CoverageFunc = 1 << 0,
55  CoverageBB = 1 << 1,
56  CoverageEdge = 1 << 2,
58  CoverageTraceBB = 1 << 4, // Deprecated.
59  CoverageTraceCmp = 1 << 5,
60  CoverageTraceDiv = 1 << 6,
61  CoverageTraceGep = 1 << 7,
62  Coverage8bitCounters = 1 << 8, // Deprecated.
63  CoverageTracePC = 1 << 9,
65  CoverageNoPrune = 1 << 11,
67  CoveragePCTable = 1 << 13,
68  CoverageStackDepth = 1 << 14,
69 };
70 
71 /// Parse a -fsanitize= or -fno-sanitize= argument's values, diagnosing any
72 /// invalid components. Returns a SanitizerMask.
73 static SanitizerMask parseArgValues(const Driver &D, const llvm::opt::Arg *A,
74  bool DiagnoseErrors);
75 
76 /// Parse -f(no-)?sanitize-coverage= flag values, diagnosing any invalid
77 /// components. Returns OR of members of \c CoverageFeature enumeration.
78 static int parseCoverageFeatures(const Driver &D, const llvm::opt::Arg *A);
79 
80 /// Produce an argument string from ArgList \p Args, which shows how it
81 /// provides some sanitizer kind from \p Mask. For example, the argument list
82 /// "-fsanitize=thread,vptr -fsanitize=address" with mask \c NeedsUbsanRt
83 /// would produce "-fsanitize=vptr".
84 static std::string lastArgumentForMask(const Driver &D,
85  const llvm::opt::ArgList &Args,
86  SanitizerMask Mask);
87 
88 /// Produce an argument string from argument \p A, which shows how it provides
89 /// a value in \p Mask. For instance, the argument
90 /// "-fsanitize=address,alignment" with mask \c NeedsUbsanRt would produce
91 /// "-fsanitize=alignment".
92 static std::string describeSanitizeArg(const llvm::opt::Arg *A,
93  SanitizerMask Mask);
94 
95 /// Produce a string containing comma-separated names of sanitizers in \p
96 /// Sanitizers set.
97 static std::string toString(const clang::SanitizerSet &Sanitizers);
98 
99 static void addDefaultBlacklists(const Driver &D, SanitizerMask Kinds,
100  std::vector<std::string> &BlacklistFiles) {
101  struct Blacklist {
102  const char *File;
103  SanitizerMask Mask;
104  } Blacklists[] = {{"asan_blacklist.txt", Address},
105  {"hwasan_blacklist.txt", HWAddress},
106  {"msan_blacklist.txt", Memory},
107  {"tsan_blacklist.txt", Thread},
108  {"dfsan_abilist.txt", DataFlow},
109  {"cfi_blacklist.txt", CFI},
110  {"ubsan_blacklist.txt", Undefined | Integer | Nullability}};
111 
112  for (auto BL : Blacklists) {
113  if (!(Kinds & BL.Mask))
114  continue;
115 
117  llvm::sys::path::append(Path, "share", BL.File);
118  if (llvm::sys::fs::exists(Path))
119  BlacklistFiles.push_back(Path.str());
120  else if (BL.Mask == CFI)
121  // If cfi_blacklist.txt cannot be found in the resource dir, driver
122  // should fail.
123  D.Diag(clang::diag::err_drv_no_such_file) << Path;
124  }
125 }
126 
127 /// Sets group bits for every group that has at least one representative already
128 /// enabled in \p Kinds.
130 #define SANITIZER(NAME, ID)
131 #define SANITIZER_GROUP(NAME, ID, ALIAS) \
132  if (Kinds & SanitizerKind::ID) \
133  Kinds |= SanitizerKind::ID##Group;
134 #include "clang/Basic/Sanitizers.def"
135  return Kinds;
136 }
137 
139  const llvm::opt::ArgList &Args) {
140  SanitizerMask TrapRemove = 0; // During the loop below, the accumulated set of
141  // sanitizers disabled by the current sanitizer
142  // argument or any argument after it.
143  SanitizerMask TrappingKinds = 0;
144  SanitizerMask TrappingSupportedWithGroups = setGroupBits(TrappingSupported);
145 
146  for (ArgList::const_reverse_iterator I = Args.rbegin(), E = Args.rend();
147  I != E; ++I) {
148  const auto *Arg = *I;
149  if (Arg->getOption().matches(options::OPT_fsanitize_trap_EQ)) {
150  Arg->claim();
151  SanitizerMask Add = parseArgValues(D, Arg, true);
152  Add &= ~TrapRemove;
153  if (SanitizerMask InvalidValues = Add & ~TrappingSupportedWithGroups) {
154  SanitizerSet S;
155  S.Mask = InvalidValues;
156  D.Diag(diag::err_drv_unsupported_option_argument) << "-fsanitize-trap"
157  << toString(S);
158  }
159  TrappingKinds |= expandSanitizerGroups(Add) & ~TrapRemove;
160  } else if (Arg->getOption().matches(options::OPT_fno_sanitize_trap_EQ)) {
161  Arg->claim();
162  TrapRemove |= expandSanitizerGroups(parseArgValues(D, Arg, true));
163  } else if (Arg->getOption().matches(
164  options::OPT_fsanitize_undefined_trap_on_error)) {
165  Arg->claim();
166  TrappingKinds |=
167  expandSanitizerGroups(UndefinedGroup & ~TrapRemove) & ~TrapRemove;
168  } else if (Arg->getOption().matches(
169  options::OPT_fno_sanitize_undefined_trap_on_error)) {
170  Arg->claim();
171  TrapRemove |= expandSanitizerGroups(UndefinedGroup);
172  }
173  }
174 
175  // Apply default trapping behavior.
176  TrappingKinds |= TrappingDefault & ~TrapRemove;
177 
178  return TrappingKinds;
179 }
180 
181 bool SanitizerArgs::needsUbsanRt() const {
182  // All of these include ubsan.
183  if (needsAsanRt() || needsMsanRt() || needsHwasanRt() || needsTsanRt() ||
184  needsDfsanRt() || needsLsanRt() || needsCfiDiagRt() ||
185  (needsScudoRt() && !requiresMinimalRuntime()))
186  return false;
187 
188  return (Sanitizers.Mask & NeedsUbsanRt & ~TrapSanitizers.Mask) ||
189  CoverageFeatures;
190 }
191 
192 bool SanitizerArgs::needsCfiRt() const {
193  return !(Sanitizers.Mask & CFI & ~TrapSanitizers.Mask) && CfiCrossDso &&
194  !ImplicitCfiRuntime;
195 }
196 
197 bool SanitizerArgs::needsCfiDiagRt() const {
198  return (Sanitizers.Mask & CFI & ~TrapSanitizers.Mask) && CfiCrossDso &&
199  !ImplicitCfiRuntime;
200 }
201 
202 bool SanitizerArgs::requiresPIE() const {
203  return NeedPIE || (Sanitizers.Mask & RequiresPIE);
204 }
205 
206 bool SanitizerArgs::needsUnwindTables() const {
207  return Sanitizers.Mask & NeedsUnwindTables;
208 }
209 
210 bool SanitizerArgs::needsLTO() const { return Sanitizers.Mask & NeedsLTO; }
211 
212 SanitizerArgs::SanitizerArgs(const ToolChain &TC,
213  const llvm::opt::ArgList &Args) {
214  SanitizerMask AllRemove = 0; // During the loop below, the accumulated set of
215  // sanitizers disabled by the current sanitizer
216  // argument or any argument after it.
217  SanitizerMask AllAddedKinds = 0; // Mask of all sanitizers ever enabled by
218  // -fsanitize= flags (directly or via group
219  // expansion), some of which may be disabled
220  // later. Used to carefully prune
221  // unused-argument diagnostics.
222  SanitizerMask DiagnosedKinds = 0; // All Kinds we have diagnosed up to now.
223  // Used to deduplicate diagnostics.
224  SanitizerMask Kinds = 0;
225  const SanitizerMask Supported = setGroupBits(TC.getSupportedSanitizers());
226 
227  CfiCrossDso = Args.hasFlag(options::OPT_fsanitize_cfi_cross_dso,
228  options::OPT_fno_sanitize_cfi_cross_dso, false);
229 
230  ToolChain::RTTIMode RTTIMode = TC.getRTTIMode();
231 
232  const Driver &D = TC.getDriver();
233  SanitizerMask TrappingKinds = parseSanitizeTrapArgs(D, Args);
234  SanitizerMask InvalidTrappingKinds = TrappingKinds & NotAllowedWithTrap;
235 
236  MinimalRuntime =
237  Args.hasFlag(options::OPT_fsanitize_minimal_runtime,
238  options::OPT_fno_sanitize_minimal_runtime, MinimalRuntime);
239 
240  // The object size sanitizer should not be enabled at -O0.
241  Arg *OptLevel = Args.getLastArg(options::OPT_O_Group);
242  bool RemoveObjectSizeAtO0 =
243  !OptLevel || OptLevel->getOption().matches(options::OPT_O0);
244 
245  for (ArgList::const_reverse_iterator I = Args.rbegin(), E = Args.rend();
246  I != E; ++I) {
247  const auto *Arg = *I;
248  if (Arg->getOption().matches(options::OPT_fsanitize_EQ)) {
249  Arg->claim();
250  SanitizerMask Add = parseArgValues(D, Arg, /*AllowGroups=*/true);
251 
252  if (RemoveObjectSizeAtO0) {
253  AllRemove |= SanitizerKind::ObjectSize;
254 
255  // The user explicitly enabled the object size sanitizer. Warn that
256  // that this does nothing at -O0.
257  if (Add & SanitizerKind::ObjectSize)
258  D.Diag(diag::warn_drv_object_size_disabled_O0)
259  << Arg->getAsString(Args);
260  }
261 
262  AllAddedKinds |= expandSanitizerGroups(Add);
263 
264  // Avoid diagnosing any sanitizer which is disabled later.
265  Add &= ~AllRemove;
266  // At this point we have not expanded groups, so any unsupported
267  // sanitizers in Add are those which have been explicitly enabled.
268  // Diagnose them.
269  if (SanitizerMask KindsToDiagnose =
270  Add & InvalidTrappingKinds & ~DiagnosedKinds) {
271  std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
272  D.Diag(diag::err_drv_argument_not_allowed_with)
273  << Desc << "-fsanitize-trap=undefined";
274  DiagnosedKinds |= KindsToDiagnose;
275  }
276  Add &= ~InvalidTrappingKinds;
277 
278  if (MinimalRuntime) {
279  if (SanitizerMask KindsToDiagnose =
280  Add & NotAllowedWithMinimalRuntime & ~DiagnosedKinds) {
281  std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
282  D.Diag(diag::err_drv_argument_not_allowed_with)
283  << Desc << "-fsanitize-minimal-runtime";
284  DiagnosedKinds |= KindsToDiagnose;
285  }
287  }
288 
289  // FIXME: Make CFI on member function calls compatible with cross-DSO CFI.
290  // There are currently two problems:
291  // - Virtual function call checks need to pass a pointer to the function
292  // address to llvm.type.test and a pointer to the address point to the
293  // diagnostic function. Currently we pass the same pointer to both
294  // places.
295  // - Non-virtual function call checks may need to check multiple type
296  // identifiers.
297  // Fixing both of those may require changes to the cross-DSO CFI
298  // interface.
299  if (CfiCrossDso && (Add & CFIMFCall & ~DiagnosedKinds)) {
300  D.Diag(diag::err_drv_argument_not_allowed_with)
301  << "-fsanitize=cfi-mfcall"
302  << "-fsanitize-cfi-cross-dso";
303  Add &= ~CFIMFCall;
304  DiagnosedKinds |= CFIMFCall;
305  }
306 
307  if (SanitizerMask KindsToDiagnose = Add & ~Supported & ~DiagnosedKinds) {
308  std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
309  D.Diag(diag::err_drv_unsupported_opt_for_target)
310  << Desc << TC.getTriple().str();
311  DiagnosedKinds |= KindsToDiagnose;
312  }
313  Add &= Supported;
314 
315  // Test for -fno-rtti + explicit -fsanitizer=vptr before expanding groups
316  // so we don't error out if -fno-rtti and -fsanitize=undefined were
317  // passed.
318  if ((Add & Vptr) && (RTTIMode == ToolChain::RM_Disabled)) {
319  if (const llvm::opt::Arg *NoRTTIArg = TC.getRTTIArg()) {
320  assert(NoRTTIArg->getOption().matches(options::OPT_fno_rtti) &&
321  "RTTI disabled without -fno-rtti option?");
322  // The user explicitly passed -fno-rtti with -fsanitize=vptr, but
323  // the vptr sanitizer requires RTTI, so this is a user error.
324  D.Diag(diag::err_drv_argument_not_allowed_with)
325  << "-fsanitize=vptr" << NoRTTIArg->getAsString(Args);
326  } else {
327  // The vptr sanitizer requires RTTI, but RTTI is disabled (by
328  // default). Warn that the vptr sanitizer is being disabled.
329  D.Diag(diag::warn_drv_disabling_vptr_no_rtti_default);
330  }
331 
332  // Take out the Vptr sanitizer from the enabled sanitizers
333  AllRemove |= Vptr;
334  }
335 
336  Add = expandSanitizerGroups(Add);
337  // Group expansion may have enabled a sanitizer which is disabled later.
338  Add &= ~AllRemove;
339  // Silently discard any unsupported sanitizers implicitly enabled through
340  // group expansion.
341  Add &= ~InvalidTrappingKinds;
342  if (MinimalRuntime) {
344  }
345  if (CfiCrossDso)
346  Add &= ~CFIMFCall;
347  Add &= Supported;
348 
349  if (Add & Fuzzer)
350  Add |= FuzzerNoLink;
351 
352  // Enable coverage if the fuzzing flag is set.
353  if (Add & FuzzerNoLink) {
354  CoverageFeatures |= CoverageInline8bitCounters | CoverageIndirCall |
356  // Due to TLS differences, stack depth tracking is only enabled on Linux
357  if (TC.getTriple().isOSLinux())
358  CoverageFeatures |= CoverageStackDepth;
359  }
360 
361  Kinds |= Add;
362  } else if (Arg->getOption().matches(options::OPT_fno_sanitize_EQ)) {
363  Arg->claim();
364  SanitizerMask Remove = parseArgValues(D, Arg, true);
365  AllRemove |= expandSanitizerGroups(Remove);
366  }
367  }
368 
369  std::pair<SanitizerMask, SanitizerMask> IncompatibleGroups[] = {
370  std::make_pair(Address, Thread | Memory),
371  std::make_pair(Thread, Memory),
372  std::make_pair(Leak, Thread | Memory),
373  std::make_pair(KernelAddress, Address | Leak | Thread | Memory),
374  std::make_pair(HWAddress, Address | Thread | Memory | KernelAddress),
375  std::make_pair(Efficiency, Address | HWAddress | Leak | Thread | Memory |
376  KernelAddress),
377  std::make_pair(Scudo, Address | HWAddress | Leak | Thread | Memory |
378  KernelAddress | Efficiency),
379  std::make_pair(SafeStack, Address | HWAddress | Leak | Thread | Memory |
380  KernelAddress | Efficiency),
381  std::make_pair(KernelHWAddress, Address | HWAddress | Leak | Thread |
382  Memory | KernelAddress | Efficiency |
383  SafeStack),
384  std::make_pair(KernelMemory, Address | HWAddress | Leak | Thread |
385  Memory | KernelAddress | Efficiency |
386  Scudo | SafeStack)};
387  // Enable toolchain specific default sanitizers if not explicitly disabled.
388  SanitizerMask Default = TC.getDefaultSanitizers() & ~AllRemove;
389 
390  // Disable default sanitizers that are incompatible with explicitly requested
391  // ones.
392  for (auto G : IncompatibleGroups) {
393  SanitizerMask Group = G.first;
394  if ((Default & Group) && (Kinds & G.second))
395  Default &= ~Group;
396  }
397 
398  Kinds |= Default;
399 
400  // We disable the vptr sanitizer if it was enabled by group expansion but RTTI
401  // is disabled.
402  if ((Kinds & Vptr) && (RTTIMode == ToolChain::RM_Disabled)) {
403  Kinds &= ~Vptr;
404  }
405 
406  // Check that LTO is enabled if we need it.
407  if ((Kinds & NeedsLTO) && !D.isUsingLTO()) {
408  D.Diag(diag::err_drv_argument_only_allowed_with)
409  << lastArgumentForMask(D, Args, Kinds & NeedsLTO) << "-flto";
410  }
411 
412  if ((Kinds & ShadowCallStack) &&
413  TC.getTriple().getArch() == llvm::Triple::aarch64 &&
414  !llvm::AArch64::isX18ReservedByDefault(TC.getTriple()) &&
415  !Args.hasArg(options::OPT_ffixed_x18)) {
416  D.Diag(diag::err_drv_argument_only_allowed_with)
417  << lastArgumentForMask(D, Args, Kinds & ShadowCallStack)
418  << "-ffixed-x18";
419  }
420 
421  // Report error if there are non-trapping sanitizers that require
422  // c++abi-specific parts of UBSan runtime, and they are not provided by the
423  // toolchain. We don't have a good way to check the latter, so we just
424  // check if the toolchan supports vptr.
425  if (~Supported & Vptr) {
426  SanitizerMask KindsToDiagnose = Kinds & ~TrappingKinds & NeedsUbsanCxxRt;
427  // The runtime library supports the Microsoft C++ ABI, but only well enough
428  // for CFI. FIXME: Remove this once we support vptr on Windows.
429  if (TC.getTriple().isOSWindows())
430  KindsToDiagnose &= ~CFI;
431  if (KindsToDiagnose) {
432  SanitizerSet S;
433  S.Mask = KindsToDiagnose;
434  D.Diag(diag::err_drv_unsupported_opt_for_target)
435  << ("-fno-sanitize-trap=" + toString(S)) << TC.getTriple().str();
436  Kinds &= ~KindsToDiagnose;
437  }
438  }
439 
440  // Warn about incompatible groups of sanitizers.
441  for (auto G : IncompatibleGroups) {
442  SanitizerMask Group = G.first;
443  if (Kinds & Group) {
444  if (SanitizerMask Incompatible = Kinds & G.second) {
445  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
446  << lastArgumentForMask(D, Args, Group)
447  << lastArgumentForMask(D, Args, Incompatible);
448  Kinds &= ~Incompatible;
449  }
450  }
451  }
452  // FIXME: Currently -fsanitize=leak is silently ignored in the presence of
453  // -fsanitize=address. Perhaps it should print an error, or perhaps
454  // -f(-no)sanitize=leak should change whether leak detection is enabled by
455  // default in ASan?
456 
457  // Parse -f(no-)?sanitize-recover flags.
459  SanitizerMask DiagnosedUnrecoverableKinds = 0;
460  SanitizerMask DiagnosedAlwaysRecoverableKinds = 0;
461  for (const auto *Arg : Args) {
462  const char *DeprecatedReplacement = nullptr;
463  if (Arg->getOption().matches(options::OPT_fsanitize_recover)) {
464  DeprecatedReplacement =
465  "-fsanitize-recover=undefined,integer' or '-fsanitize-recover=all";
467  Arg->claim();
468  } else if (Arg->getOption().matches(options::OPT_fno_sanitize_recover)) {
469  DeprecatedReplacement = "-fno-sanitize-recover=undefined,integer' or "
470  "'-fno-sanitize-recover=all";
472  Arg->claim();
473  } else if (Arg->getOption().matches(options::OPT_fsanitize_recover_EQ)) {
474  SanitizerMask Add = parseArgValues(D, Arg, true);
475  // Report error if user explicitly tries to recover from unrecoverable
476  // sanitizer.
477  if (SanitizerMask KindsToDiagnose =
478  Add & Unrecoverable & ~DiagnosedUnrecoverableKinds) {
479  SanitizerSet SetToDiagnose;
480  SetToDiagnose.Mask |= KindsToDiagnose;
481  D.Diag(diag::err_drv_unsupported_option_argument)
482  << Arg->getOption().getName() << toString(SetToDiagnose);
483  DiagnosedUnrecoverableKinds |= KindsToDiagnose;
484  }
485  RecoverableKinds |= expandSanitizerGroups(Add);
486  Arg->claim();
487  } else if (Arg->getOption().matches(options::OPT_fno_sanitize_recover_EQ)) {
488  SanitizerMask Remove = parseArgValues(D, Arg, true);
489  // Report error if user explicitly tries to disable recovery from
490  // always recoverable sanitizer.
491  if (SanitizerMask KindsToDiagnose =
492  Remove & AlwaysRecoverable & ~DiagnosedAlwaysRecoverableKinds) {
493  SanitizerSet SetToDiagnose;
494  SetToDiagnose.Mask |= KindsToDiagnose;
495  D.Diag(diag::err_drv_unsupported_option_argument)
496  << Arg->getOption().getName() << toString(SetToDiagnose);
497  DiagnosedAlwaysRecoverableKinds |= KindsToDiagnose;
498  }
499  RecoverableKinds &= ~expandSanitizerGroups(Remove);
500  Arg->claim();
501  }
502  if (DeprecatedReplacement) {
503  D.Diag(diag::warn_drv_deprecated_arg) << Arg->getAsString(Args)
504  << DeprecatedReplacement;
505  }
506  }
507  RecoverableKinds &= Kinds;
508  RecoverableKinds &= ~Unrecoverable;
509 
510  TrappingKinds &= Kinds;
511  RecoverableKinds &= ~TrappingKinds;
512 
513  // Setup blacklist files.
514  // Add default blacklist from resource directory.
515  addDefaultBlacklists(D, Kinds, BlacklistFiles);
516  // Parse -f(no-)sanitize-blacklist options.
517  for (const auto *Arg : Args) {
518  if (Arg->getOption().matches(options::OPT_fsanitize_blacklist)) {
519  Arg->claim();
520  std::string BLPath = Arg->getValue();
521  if (llvm::sys::fs::exists(BLPath)) {
522  BlacklistFiles.push_back(BLPath);
523  ExtraDeps.push_back(BLPath);
524  } else {
525  D.Diag(clang::diag::err_drv_no_such_file) << BLPath;
526  }
527  } else if (Arg->getOption().matches(options::OPT_fno_sanitize_blacklist)) {
528  Arg->claim();
529  BlacklistFiles.clear();
530  ExtraDeps.clear();
531  }
532  }
533  // Validate blacklists format.
534  {
535  std::string BLError;
536  std::unique_ptr<llvm::SpecialCaseList> SCL(
537  llvm::SpecialCaseList::create(BlacklistFiles, BLError));
538  if (!SCL.get())
539  D.Diag(clang::diag::err_drv_malformed_sanitizer_blacklist) << BLError;
540  }
541 
542  // Parse -f[no-]sanitize-memory-track-origins[=level] options.
543  if (AllAddedKinds & Memory) {
544  if (Arg *A =
545  Args.getLastArg(options::OPT_fsanitize_memory_track_origins_EQ,
546  options::OPT_fsanitize_memory_track_origins,
547  options::OPT_fno_sanitize_memory_track_origins)) {
548  if (A->getOption().matches(options::OPT_fsanitize_memory_track_origins)) {
549  MsanTrackOrigins = 2;
550  } else if (A->getOption().matches(
551  options::OPT_fno_sanitize_memory_track_origins)) {
552  MsanTrackOrigins = 0;
553  } else {
554  StringRef S = A->getValue();
555  if (S.getAsInteger(0, MsanTrackOrigins) || MsanTrackOrigins < 0 ||
556  MsanTrackOrigins > 2) {
557  D.Diag(clang::diag::err_drv_invalid_value) << A->getAsString(Args) << S;
558  }
559  }
560  }
561  MsanUseAfterDtor =
562  Args.hasFlag(options::OPT_fsanitize_memory_use_after_dtor,
563  options::OPT_fno_sanitize_memory_use_after_dtor,
564  MsanUseAfterDtor);
565  NeedPIE |= !(TC.getTriple().isOSLinux() &&
566  TC.getTriple().getArch() == llvm::Triple::x86_64);
567  } else {
568  MsanUseAfterDtor = false;
569  }
570 
571  if (AllAddedKinds & Thread) {
572  TsanMemoryAccess = Args.hasFlag(options::OPT_fsanitize_thread_memory_access,
573  options::OPT_fno_sanitize_thread_memory_access,
574  TsanMemoryAccess);
575  TsanFuncEntryExit = Args.hasFlag(options::OPT_fsanitize_thread_func_entry_exit,
576  options::OPT_fno_sanitize_thread_func_entry_exit,
577  TsanFuncEntryExit);
578  TsanAtomics = Args.hasFlag(options::OPT_fsanitize_thread_atomics,
579  options::OPT_fno_sanitize_thread_atomics,
580  TsanAtomics);
581  }
582 
583  if (AllAddedKinds & CFI) {
584  // Without PIE, external function address may resolve to a PLT record, which
585  // can not be verified by the target module.
586  NeedPIE |= CfiCrossDso;
587  CfiICallGeneralizePointers =
588  Args.hasArg(options::OPT_fsanitize_cfi_icall_generalize_pointers);
589 
590  if (CfiCrossDso && CfiICallGeneralizePointers)
591  D.Diag(diag::err_drv_argument_not_allowed_with)
592  << "-fsanitize-cfi-cross-dso"
593  << "-fsanitize-cfi-icall-generalize-pointers";
594  }
595 
596  Stats = Args.hasFlag(options::OPT_fsanitize_stats,
597  options::OPT_fno_sanitize_stats, false);
598 
599  if (MinimalRuntime) {
600  SanitizerMask IncompatibleMask =
602  if (IncompatibleMask)
603  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
604  << "-fsanitize-minimal-runtime"
605  << lastArgumentForMask(D, Args, IncompatibleMask);
606 
607  SanitizerMask NonTrappingCfi = Kinds & CFI & ~TrappingKinds;
608  if (NonTrappingCfi)
609  D.Diag(clang::diag::err_drv_argument_only_allowed_with)
610  << "fsanitize-minimal-runtime"
611  << "fsanitize-trap=cfi";
612  }
613 
614  // Parse -f(no-)?sanitize-coverage flags if coverage is supported by the
615  // enabled sanitizers.
616  for (const auto *Arg : Args) {
617  if (Arg->getOption().matches(options::OPT_fsanitize_coverage)) {
618  int LegacySanitizeCoverage;
619  if (Arg->getNumValues() == 1 &&
620  !StringRef(Arg->getValue(0))
621  .getAsInteger(0, LegacySanitizeCoverage)) {
622  CoverageFeatures = 0;
623  Arg->claim();
624  if (LegacySanitizeCoverage != 0) {
625  D.Diag(diag::warn_drv_deprecated_arg)
626  << Arg->getAsString(Args) << "-fsanitize-coverage=trace-pc-guard";
627  }
628  continue;
629  }
630  CoverageFeatures |= parseCoverageFeatures(D, Arg);
631 
632  // Disable coverage and not claim the flags if there is at least one
633  // non-supporting sanitizer.
634  if (!(AllAddedKinds & ~AllRemove & ~setGroupBits(SupportsCoverage))) {
635  Arg->claim();
636  } else {
637  CoverageFeatures = 0;
638  }
639  } else if (Arg->getOption().matches(options::OPT_fno_sanitize_coverage)) {
640  Arg->claim();
641  CoverageFeatures &= ~parseCoverageFeatures(D, Arg);
642  }
643  }
644  // Choose at most one coverage type: function, bb, or edge.
645  if ((CoverageFeatures & CoverageFunc) && (CoverageFeatures & CoverageBB))
646  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
647  << "-fsanitize-coverage=func"
648  << "-fsanitize-coverage=bb";
649  if ((CoverageFeatures & CoverageFunc) && (CoverageFeatures & CoverageEdge))
650  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
651  << "-fsanitize-coverage=func"
652  << "-fsanitize-coverage=edge";
653  if ((CoverageFeatures & CoverageBB) && (CoverageFeatures & CoverageEdge))
654  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
655  << "-fsanitize-coverage=bb"
656  << "-fsanitize-coverage=edge";
657  // Basic block tracing and 8-bit counters require some type of coverage
658  // enabled.
659  if (CoverageFeatures & CoverageTraceBB)
660  D.Diag(clang::diag::warn_drv_deprecated_arg)
661  << "-fsanitize-coverage=trace-bb"
662  << "-fsanitize-coverage=trace-pc-guard";
663  if (CoverageFeatures & Coverage8bitCounters)
664  D.Diag(clang::diag::warn_drv_deprecated_arg)
665  << "-fsanitize-coverage=8bit-counters"
666  << "-fsanitize-coverage=trace-pc-guard";
667 
668  int InsertionPointTypes = CoverageFunc | CoverageBB | CoverageEdge;
669  int InstrumentationTypes =
671  if ((CoverageFeatures & InsertionPointTypes) &&
672  !(CoverageFeatures & InstrumentationTypes)) {
673  D.Diag(clang::diag::warn_drv_deprecated_arg)
674  << "-fsanitize-coverage=[func|bb|edge]"
675  << "-fsanitize-coverage=[func|bb|edge],[trace-pc-guard|trace-pc]";
676  }
677 
678  // trace-pc w/o func/bb/edge implies edge.
679  if (!(CoverageFeatures & InsertionPointTypes)) {
680  if (CoverageFeatures &
682  CoverageFeatures |= CoverageEdge;
683 
684  if (CoverageFeatures & CoverageStackDepth)
685  CoverageFeatures |= CoverageFunc;
686  }
687 
688  SharedRuntime =
689  Args.hasFlag(options::OPT_shared_libsan, options::OPT_static_libsan,
690  TC.getTriple().isAndroid() || TC.getTriple().isOSFuchsia() ||
691  TC.getTriple().isOSDarwin());
692 
693  ImplicitCfiRuntime = TC.getTriple().isAndroid();
694 
695  if (AllAddedKinds & Address) {
696  NeedPIE |= TC.getTriple().isOSFuchsia();
697  if (Arg *A =
698  Args.getLastArg(options::OPT_fsanitize_address_field_padding)) {
699  StringRef S = A->getValue();
700  // Legal values are 0 and 1, 2, but in future we may add more levels.
701  if (S.getAsInteger(0, AsanFieldPadding) || AsanFieldPadding < 0 ||
702  AsanFieldPadding > 2) {
703  D.Diag(clang::diag::err_drv_invalid_value) << A->getAsString(Args) << S;
704  }
705  }
706 
707  if (Arg *WindowsDebugRTArg =
708  Args.getLastArg(options::OPT__SLASH_MTd, options::OPT__SLASH_MT,
709  options::OPT__SLASH_MDd, options::OPT__SLASH_MD,
710  options::OPT__SLASH_LDd, options::OPT__SLASH_LD)) {
711  switch (WindowsDebugRTArg->getOption().getID()) {
712  case options::OPT__SLASH_MTd:
713  case options::OPT__SLASH_MDd:
714  case options::OPT__SLASH_LDd:
715  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
716  << WindowsDebugRTArg->getAsString(Args)
717  << lastArgumentForMask(D, Args, Address);
718  D.Diag(clang::diag::note_drv_address_sanitizer_debug_runtime);
719  }
720  }
721 
722  AsanUseAfterScope = Args.hasFlag(
723  options::OPT_fsanitize_address_use_after_scope,
724  options::OPT_fno_sanitize_address_use_after_scope, AsanUseAfterScope);
725 
726  AsanPoisonCustomArrayCookie = Args.hasFlag(
727  options::OPT_fsanitize_address_poison_custom_array_cookie,
728  options::OPT_fno_sanitize_address_poison_custom_array_cookie,
729  AsanPoisonCustomArrayCookie);
730 
731  // As a workaround for a bug in gold 2.26 and earlier, dead stripping of
732  // globals in ASan is disabled by default on ELF targets.
733  // See https://sourceware.org/bugzilla/show_bug.cgi?id=19002
734  AsanGlobalsDeadStripping =
735  !TC.getTriple().isOSBinFormatELF() || TC.getTriple().isOSFuchsia() ||
736  Args.hasArg(options::OPT_fsanitize_address_globals_dead_stripping);
737 
738  AsanUseOdrIndicator =
739  Args.hasFlag(options::OPT_fsanitize_address_use_odr_indicator,
740  options::OPT_fno_sanitize_address_use_odr_indicator,
741  AsanUseOdrIndicator);
742  } else {
743  AsanUseAfterScope = false;
744  }
745 
746  if (AllAddedKinds & HWAddress) {
747  if (Arg *HwasanAbiArg =
748  Args.getLastArg(options::OPT_fsanitize_hwaddress_abi_EQ)) {
749  HwasanAbi = HwasanAbiArg->getValue();
750  if (HwasanAbi != "platform" && HwasanAbi != "interceptor")
751  D.Diag(clang::diag::err_drv_invalid_value)
752  << HwasanAbiArg->getAsString(Args) << HwasanAbi;
753  } else {
754  HwasanAbi = "interceptor";
755  }
756  }
757 
758  if (AllAddedKinds & SafeStack) {
759  // SafeStack runtime is built into the system on Fuchsia.
760  SafeStackRuntime = !TC.getTriple().isOSFuchsia();
761  }
762 
763  // Parse -link-cxx-sanitizer flag.
764  LinkCXXRuntimes =
765  Args.hasArg(options::OPT_fsanitize_link_cxx_runtime) || D.CCCIsCXX();
766 
767  // Finally, initialize the set of available and recoverable sanitizers.
768  Sanitizers.Mask |= Kinds;
769  RecoverableSanitizers.Mask |= RecoverableKinds;
770  TrapSanitizers.Mask |= TrappingKinds;
771  assert(!(RecoverableKinds & TrappingKinds) &&
772  "Overlap between recoverable and trapping sanitizers");
773 }
774 
775 static std::string toString(const clang::SanitizerSet &Sanitizers) {
776  std::string Res;
777 #define SANITIZER(NAME, ID) \
778  if (Sanitizers.has(ID)) { \
779  if (!Res.empty()) \
780  Res += ","; \
781  Res += NAME; \
782  }
783 #include "clang/Basic/Sanitizers.def"
784  return Res;
785 }
786 
787 static void addIncludeLinkerOption(const ToolChain &TC,
788  const llvm::opt::ArgList &Args,
789  llvm::opt::ArgStringList &CmdArgs,
790  StringRef SymbolName) {
791  SmallString<64> LinkerOptionFlag;
792  LinkerOptionFlag = "--linker-option=/include:";
793  if (TC.getTriple().getArch() == llvm::Triple::x86) {
794  // Win32 mangles C function names with a '_' prefix.
795  LinkerOptionFlag += '_';
796  }
797  LinkerOptionFlag += SymbolName;
798  CmdArgs.push_back(Args.MakeArgString(LinkerOptionFlag));
799 }
800 
801 void SanitizerArgs::addArgs(const ToolChain &TC, const llvm::opt::ArgList &Args,
802  llvm::opt::ArgStringList &CmdArgs,
803  types::ID InputType) const {
804  // NVPTX doesn't currently support sanitizers. Bailing out here means that
805  // e.g. -fsanitize=address applies only to host code, which is what we want
806  // for now.
807  if (TC.getTriple().isNVPTX())
808  return;
809 
810  // Translate available CoverageFeatures to corresponding clang-cc1 flags.
811  // Do it even if Sanitizers.empty() since some forms of coverage don't require
812  // sanitizers.
813  std::pair<int, const char *> CoverageFlags[] = {
814  std::make_pair(CoverageFunc, "-fsanitize-coverage-type=1"),
815  std::make_pair(CoverageBB, "-fsanitize-coverage-type=2"),
816  std::make_pair(CoverageEdge, "-fsanitize-coverage-type=3"),
817  std::make_pair(CoverageIndirCall, "-fsanitize-coverage-indirect-calls"),
818  std::make_pair(CoverageTraceBB, "-fsanitize-coverage-trace-bb"),
819  std::make_pair(CoverageTraceCmp, "-fsanitize-coverage-trace-cmp"),
820  std::make_pair(CoverageTraceDiv, "-fsanitize-coverage-trace-div"),
821  std::make_pair(CoverageTraceGep, "-fsanitize-coverage-trace-gep"),
822  std::make_pair(Coverage8bitCounters, "-fsanitize-coverage-8bit-counters"),
823  std::make_pair(CoverageTracePC, "-fsanitize-coverage-trace-pc"),
824  std::make_pair(CoverageTracePCGuard, "-fsanitize-coverage-trace-pc-guard"),
825  std::make_pair(CoverageInline8bitCounters, "-fsanitize-coverage-inline-8bit-counters"),
826  std::make_pair(CoveragePCTable, "-fsanitize-coverage-pc-table"),
827  std::make_pair(CoverageNoPrune, "-fsanitize-coverage-no-prune"),
828  std::make_pair(CoverageStackDepth, "-fsanitize-coverage-stack-depth")};
829  for (auto F : CoverageFlags) {
830  if (CoverageFeatures & F.first)
831  CmdArgs.push_back(F.second);
832  }
833 
834  if (TC.getTriple().isOSWindows() && needsUbsanRt()) {
835  // Instruct the code generator to embed linker directives in the object file
836  // that cause the required runtime libraries to be linked.
837  CmdArgs.push_back(Args.MakeArgString(
838  "--dependent-lib=" + TC.getCompilerRT(Args, "ubsan_standalone")));
839  if (types::isCXX(InputType))
840  CmdArgs.push_back(Args.MakeArgString(
841  "--dependent-lib=" + TC.getCompilerRT(Args, "ubsan_standalone_cxx")));
842  }
843  if (TC.getTriple().isOSWindows() && needsStatsRt()) {
844  CmdArgs.push_back(Args.MakeArgString("--dependent-lib=" +
845  TC.getCompilerRT(Args, "stats_client")));
846 
847  // The main executable must export the stats runtime.
848  // FIXME: Only exporting from the main executable (e.g. based on whether the
849  // translation unit defines main()) would save a little space, but having
850  // multiple copies of the runtime shouldn't hurt.
851  CmdArgs.push_back(Args.MakeArgString("--dependent-lib=" +
852  TC.getCompilerRT(Args, "stats")));
853  addIncludeLinkerOption(TC, Args, CmdArgs, "__sanitizer_stats_register");
854  }
855 
856  if (Sanitizers.empty())
857  return;
858  CmdArgs.push_back(Args.MakeArgString("-fsanitize=" + toString(Sanitizers)));
859 
860  if (!RecoverableSanitizers.empty())
861  CmdArgs.push_back(Args.MakeArgString("-fsanitize-recover=" +
862  toString(RecoverableSanitizers)));
863 
864  if (!TrapSanitizers.empty())
865  CmdArgs.push_back(
866  Args.MakeArgString("-fsanitize-trap=" + toString(TrapSanitizers)));
867 
868  for (const auto &BLPath : BlacklistFiles) {
869  SmallString<64> BlacklistOpt("-fsanitize-blacklist=");
870  BlacklistOpt += BLPath;
871  CmdArgs.push_back(Args.MakeArgString(BlacklistOpt));
872  }
873  for (const auto &Dep : ExtraDeps) {
874  SmallString<64> ExtraDepOpt("-fdepfile-entry=");
875  ExtraDepOpt += Dep;
876  CmdArgs.push_back(Args.MakeArgString(ExtraDepOpt));
877  }
878 
879  if (MsanTrackOrigins)
880  CmdArgs.push_back(Args.MakeArgString("-fsanitize-memory-track-origins=" +
881  Twine(MsanTrackOrigins)));
882 
883  if (MsanUseAfterDtor)
884  CmdArgs.push_back("-fsanitize-memory-use-after-dtor");
885 
886  // FIXME: Pass these parameters as function attributes, not as -llvm flags.
887  if (!TsanMemoryAccess) {
888  CmdArgs.push_back("-mllvm");
889  CmdArgs.push_back("-tsan-instrument-memory-accesses=0");
890  CmdArgs.push_back("-mllvm");
891  CmdArgs.push_back("-tsan-instrument-memintrinsics=0");
892  }
893  if (!TsanFuncEntryExit) {
894  CmdArgs.push_back("-mllvm");
895  CmdArgs.push_back("-tsan-instrument-func-entry-exit=0");
896  }
897  if (!TsanAtomics) {
898  CmdArgs.push_back("-mllvm");
899  CmdArgs.push_back("-tsan-instrument-atomics=0");
900  }
901 
902  if (CfiCrossDso)
903  CmdArgs.push_back("-fsanitize-cfi-cross-dso");
904 
905  if (CfiICallGeneralizePointers)
906  CmdArgs.push_back("-fsanitize-cfi-icall-generalize-pointers");
907 
908  if (Stats)
909  CmdArgs.push_back("-fsanitize-stats");
910 
911  if (MinimalRuntime)
912  CmdArgs.push_back("-fsanitize-minimal-runtime");
913 
914  if (AsanFieldPadding)
915  CmdArgs.push_back(Args.MakeArgString("-fsanitize-address-field-padding=" +
916  Twine(AsanFieldPadding)));
917 
918  if (AsanUseAfterScope)
919  CmdArgs.push_back("-fsanitize-address-use-after-scope");
920 
921  if (AsanPoisonCustomArrayCookie)
922  CmdArgs.push_back("-fsanitize-address-poison-custom-array-cookie");
923 
924  if (AsanGlobalsDeadStripping)
925  CmdArgs.push_back("-fsanitize-address-globals-dead-stripping");
926 
927  if (AsanUseOdrIndicator)
928  CmdArgs.push_back("-fsanitize-address-use-odr-indicator");
929 
930  if (!HwasanAbi.empty()) {
931  CmdArgs.push_back("-default-function-attr");
932  CmdArgs.push_back(Args.MakeArgString("hwasan-abi=" + HwasanAbi));
933  }
934 
935  // MSan: Workaround for PR16386.
936  // ASan: This is mainly to help LSan with cases such as
937  // https://github.com/google/sanitizers/issues/373
938  // We can't make this conditional on -fsanitize=leak, as that flag shouldn't
939  // affect compilation.
940  if (Sanitizers.has(Memory) || Sanitizers.has(Address))
941  CmdArgs.push_back("-fno-assume-sane-operator-new");
942 
943  // Require -fvisibility= flag on non-Windows when compiling if vptr CFI is
944  // enabled.
945  if (Sanitizers.hasOneOf(CFIClasses) && !TC.getTriple().isOSWindows() &&
946  !Args.hasArg(options::OPT_fvisibility_EQ)) {
947  TC.getDriver().Diag(clang::diag::err_drv_argument_only_allowed_with)
948  << lastArgumentForMask(TC.getDriver(), Args,
949  Sanitizers.Mask & CFIClasses)
950  << "-fvisibility=";
951  }
952 }
953 
954 SanitizerMask parseArgValues(const Driver &D, const llvm::opt::Arg *A,
955  bool DiagnoseErrors) {
956  assert((A->getOption().matches(options::OPT_fsanitize_EQ) ||
957  A->getOption().matches(options::OPT_fno_sanitize_EQ) ||
958  A->getOption().matches(options::OPT_fsanitize_recover_EQ) ||
959  A->getOption().matches(options::OPT_fno_sanitize_recover_EQ) ||
960  A->getOption().matches(options::OPT_fsanitize_trap_EQ) ||
961  A->getOption().matches(options::OPT_fno_sanitize_trap_EQ)) &&
962  "Invalid argument in parseArgValues!");
963  SanitizerMask Kinds = 0;
964  for (int i = 0, n = A->getNumValues(); i != n; ++i) {
965  const char *Value = A->getValue(i);
967  // Special case: don't accept -fsanitize=all.
968  if (A->getOption().matches(options::OPT_fsanitize_EQ) &&
969  0 == strcmp("all", Value))
970  Kind = 0;
971  // Similarly, don't accept -fsanitize=efficiency-all.
972  else if (A->getOption().matches(options::OPT_fsanitize_EQ) &&
973  0 == strcmp("efficiency-all", Value))
974  Kind = 0;
975  else
976  Kind = parseSanitizerValue(Value, /*AllowGroups=*/true);
977 
978  if (Kind)
979  Kinds |= Kind;
980  else if (DiagnoseErrors)
981  D.Diag(clang::diag::err_drv_unsupported_option_argument)
982  << A->getOption().getName() << Value;
983  }
984  return Kinds;
985 }
986 
987 int parseCoverageFeatures(const Driver &D, const llvm::opt::Arg *A) {
988  assert(A->getOption().matches(options::OPT_fsanitize_coverage) ||
989  A->getOption().matches(options::OPT_fno_sanitize_coverage));
990  int Features = 0;
991  for (int i = 0, n = A->getNumValues(); i != n; ++i) {
992  const char *Value = A->getValue(i);
993  int F = llvm::StringSwitch<int>(Value)
994  .Case("func", CoverageFunc)
995  .Case("bb", CoverageBB)
996  .Case("edge", CoverageEdge)
997  .Case("indirect-calls", CoverageIndirCall)
998  .Case("trace-bb", CoverageTraceBB)
999  .Case("trace-cmp", CoverageTraceCmp)
1000  .Case("trace-div", CoverageTraceDiv)
1001  .Case("trace-gep", CoverageTraceGep)
1002  .Case("8bit-counters", Coverage8bitCounters)
1003  .Case("trace-pc", CoverageTracePC)
1004  .Case("trace-pc-guard", CoverageTracePCGuard)
1005  .Case("no-prune", CoverageNoPrune)
1006  .Case("inline-8bit-counters", CoverageInline8bitCounters)
1007  .Case("pc-table", CoveragePCTable)
1008  .Case("stack-depth", CoverageStackDepth)
1009  .Default(0);
1010  if (F == 0)
1011  D.Diag(clang::diag::err_drv_unsupported_option_argument)
1012  << A->getOption().getName() << Value;
1013  Features |= F;
1014  }
1015  return Features;
1016 }
1017 
1018 std::string lastArgumentForMask(const Driver &D, const llvm::opt::ArgList &Args,
1019  SanitizerMask Mask) {
1020  for (llvm::opt::ArgList::const_reverse_iterator I = Args.rbegin(),
1021  E = Args.rend();
1022  I != E; ++I) {
1023  const auto *Arg = *I;
1024  if (Arg->getOption().matches(options::OPT_fsanitize_EQ)) {
1025  SanitizerMask AddKinds =
1026  expandSanitizerGroups(parseArgValues(D, Arg, false));
1027  if (AddKinds & Mask)
1028  return describeSanitizeArg(Arg, Mask);
1029  } else if (Arg->getOption().matches(options::OPT_fno_sanitize_EQ)) {
1030  SanitizerMask RemoveKinds =
1031  expandSanitizerGroups(parseArgValues(D, Arg, false));
1032  Mask &= ~RemoveKinds;
1033  }
1034  }
1035  llvm_unreachable("arg list didn't provide expected value");
1036 }
1037 
1038 std::string describeSanitizeArg(const llvm::opt::Arg *A, SanitizerMask Mask) {
1039  assert(A->getOption().matches(options::OPT_fsanitize_EQ)
1040  && "Invalid argument in describeSanitizerArg!");
1041 
1042  std::string Sanitizers;
1043  for (int i = 0, n = A->getNumValues(); i != n; ++i) {
1045  parseSanitizerValue(A->getValue(i), /*AllowGroups=*/true)) &
1046  Mask) {
1047  if (!Sanitizers.empty())
1048  Sanitizers += ",";
1049  Sanitizers += A->getValue(i);
1050  }
1051  }
1052 
1053  assert(!Sanitizers.empty() && "arg didn't provide expected value");
1054  return "-fsanitize=" + Sanitizers;
1055 }
bool isUsingLTO() const
Returns true if we are performing any kind of LTO.
Definition: Driver.h:520
DiagnosticBuilder Diag(unsigned DiagID) const
Definition: Driver.h:109
Defines the clang::SanitizerKind enum.
static std::string toString(const clang::SanitizerSet &Sanitizers)
Produce a string containing comma-separated names of sanitizers in Sanitizers set.
SanitizerMask Mask
Bitmask of enabled sanitizers.
Definition: Sanitizers.h:73
CoverageFeature
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:58
const llvm::opt::Arg * getRTTIArg() const
Definition: ToolChain.h:239
static SanitizerMask parseArgValues(const Driver &D, const llvm::opt::Arg *A, bool DiagnoseErrors)
Parse a -fsanitize= or -fno-sanitize= argument&#39;s values, diagnosing any invalid components.
virtual std::string getCompilerRT(const llvm::opt::ArgList &Args, StringRef Component, bool Shared=false) const
Definition: ToolChain.cpp:365
static int parseCoverageFeatures(const Driver &D, const llvm::opt::Arg *A)
Parse -f(no-)?sanitize-coverage= flag values, diagnosing any invalid components.
static void addIncludeLinkerOption(const ToolChain &TC, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, StringRef SymbolName)
Kind
const Driver & getDriver() const
Definition: ToolChain.h:186
bool CCCIsCXX() const
Whether the driver should follow g++ like behavior.
Definition: Driver.h:173
virtual SanitizerMask getDefaultSanitizers() const
Return sanitizers which are enabled by default.
Definition: ToolChain.h:567
Dataflow Directional Tag Classes.
static void addDefaultBlacklists(const Driver &D, SanitizerMask Kinds, std::vector< std::string > &BlacklistFiles)
std::unique_ptr< DiagnosticConsumer > create(StringRef OutputFile, DiagnosticOptions *Diags, bool MergeChildRecords=false)
Returns a DiagnosticConsumer that serializes diagnostics to a bitcode file.
SanitizerMask parseSanitizerValue(StringRef Value, bool AllowGroups)
Parse a single value from a -fsanitize= or -fno-sanitize= value list.
Definition: Sanitizers.cpp:19
static SanitizerMask setGroupBits(SanitizerMask Kinds)
Sets group bits for every group that has at least one representative already enabled in Kinds...
uint64_t SanitizerMask
Definition: Sanitizers.h:26
bool isCXX(ID Id)
isCXX - Is this a "C++" input (C++ and Obj-C++ sources and headers).
Definition: Types.cpp:136
RTTIMode getRTTIMode() const
Definition: ToolChain.h:242
const llvm::Triple & getTriple() const
Definition: ToolChain.h:188
virtual SanitizerMask getSupportedSanitizers() const
Return sanitizers which are available in this toolchain.
Definition: ToolChain.cpp:818
SanitizerMask expandSanitizerGroups(SanitizerMask Kinds)
For each sanitizer group bit set in Kinds, set the bits for sanitizers this group enables...
Definition: Sanitizers.cpp:29
static SanitizerMask parseSanitizeTrapArgs(const Driver &D, const llvm::opt::ArgList &Args)
static std::string describeSanitizeArg(const llvm::opt::Arg *A, SanitizerMask Mask)
Produce an argument string from argument A, which shows how it provides a value in Mask...
static std::string lastArgumentForMask(const Driver &D, const llvm::opt::ArgList &Args, SanitizerMask Mask)
Produce an argument string from ArgList Args, which shows how it provides some sanitizer kind from Ma...
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:89
std::string ResourceDir
The path to the compiler resource directory.
Definition: Driver.h:132