clang  8.0.0svn
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,
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 SanitizerArgs::SanitizerArgs(const ToolChain &TC,
211  const llvm::opt::ArgList &Args) {
212  SanitizerMask AllRemove = 0; // During the loop below, the accumulated set of
213  // sanitizers disabled by the current sanitizer
214  // argument or any argument after it.
215  SanitizerMask AllAddedKinds = 0; // Mask of all sanitizers ever enabled by
216  // -fsanitize= flags (directly or via group
217  // expansion), some of which may be disabled
218  // later. Used to carefully prune
219  // unused-argument diagnostics.
220  SanitizerMask DiagnosedKinds = 0; // All Kinds we have diagnosed up to now.
221  // Used to deduplicate diagnostics.
222  SanitizerMask Kinds = 0;
223  const SanitizerMask Supported = setGroupBits(TC.getSupportedSanitizers());
224 
225  CfiCrossDso = Args.hasFlag(options::OPT_fsanitize_cfi_cross_dso,
226  options::OPT_fno_sanitize_cfi_cross_dso, false);
227 
228  ToolChain::RTTIMode RTTIMode = TC.getRTTIMode();
229 
230  const Driver &D = TC.getDriver();
231  SanitizerMask TrappingKinds = parseSanitizeTrapArgs(D, Args);
232  SanitizerMask InvalidTrappingKinds = TrappingKinds & NotAllowedWithTrap;
233 
234  MinimalRuntime =
235  Args.hasFlag(options::OPT_fsanitize_minimal_runtime,
236  options::OPT_fno_sanitize_minimal_runtime, MinimalRuntime);
237 
238  // The object size sanitizer should not be enabled at -O0.
239  Arg *OptLevel = Args.getLastArg(options::OPT_O_Group);
240  bool RemoveObjectSizeAtO0 =
241  !OptLevel || OptLevel->getOption().matches(options::OPT_O0);
242 
243  for (ArgList::const_reverse_iterator I = Args.rbegin(), E = Args.rend();
244  I != E; ++I) {
245  const auto *Arg = *I;
246  if (Arg->getOption().matches(options::OPT_fsanitize_EQ)) {
247  Arg->claim();
248  SanitizerMask Add = parseArgValues(D, Arg, /*AllowGroups=*/true);
249 
250  if (RemoveObjectSizeAtO0) {
251  AllRemove |= SanitizerKind::ObjectSize;
252 
253  // The user explicitly enabled the object size sanitizer. Warn that
254  // that this does nothing at -O0.
255  if (Add & SanitizerKind::ObjectSize)
256  D.Diag(diag::warn_drv_object_size_disabled_O0)
257  << Arg->getAsString(Args);
258  }
259 
260  AllAddedKinds |= expandSanitizerGroups(Add);
261 
262  // Avoid diagnosing any sanitizer which is disabled later.
263  Add &= ~AllRemove;
264  // At this point we have not expanded groups, so any unsupported
265  // sanitizers in Add are those which have been explicitly enabled.
266  // Diagnose them.
267  if (SanitizerMask KindsToDiagnose =
268  Add & InvalidTrappingKinds & ~DiagnosedKinds) {
269  std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
270  D.Diag(diag::err_drv_argument_not_allowed_with)
271  << Desc << "-fsanitize-trap=undefined";
272  DiagnosedKinds |= KindsToDiagnose;
273  }
274  Add &= ~InvalidTrappingKinds;
275 
276  if (MinimalRuntime) {
277  if (SanitizerMask KindsToDiagnose =
278  Add & NotAllowedWithMinimalRuntime & ~DiagnosedKinds) {
279  std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
280  D.Diag(diag::err_drv_argument_not_allowed_with)
281  << Desc << "-fsanitize-minimal-runtime";
282  DiagnosedKinds |= KindsToDiagnose;
283  }
285  }
286 
287  // FIXME: Make CFI on member function calls compatible with cross-DSO CFI.
288  // There are currently two problems:
289  // - Virtual function call checks need to pass a pointer to the function
290  // address to llvm.type.test and a pointer to the address point to the
291  // diagnostic function. Currently we pass the same pointer to both
292  // places.
293  // - Non-virtual function call checks may need to check multiple type
294  // identifiers.
295  // Fixing both of those may require changes to the cross-DSO CFI
296  // interface.
297  if (CfiCrossDso && (Add & CFIMFCall & ~DiagnosedKinds)) {
298  D.Diag(diag::err_drv_argument_not_allowed_with)
299  << "-fsanitize=cfi-mfcall"
300  << "-fsanitize-cfi-cross-dso";
301  Add &= ~CFIMFCall;
302  DiagnosedKinds |= CFIMFCall;
303  }
304 
305  if (SanitizerMask KindsToDiagnose = Add & ~Supported & ~DiagnosedKinds) {
306  std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
307  D.Diag(diag::err_drv_unsupported_opt_for_target)
308  << Desc << TC.getTriple().str();
309  DiagnosedKinds |= KindsToDiagnose;
310  }
311  Add &= Supported;
312 
313  // Test for -fno-rtti + explicit -fsanitizer=vptr before expanding groups
314  // so we don't error out if -fno-rtti and -fsanitize=undefined were
315  // passed.
316  if ((Add & Vptr) && (RTTIMode == ToolChain::RM_Disabled)) {
317  if (const llvm::opt::Arg *NoRTTIArg = TC.getRTTIArg()) {
318  assert(NoRTTIArg->getOption().matches(options::OPT_fno_rtti) &&
319  "RTTI disabled without -fno-rtti option?");
320  // The user explicitly passed -fno-rtti with -fsanitize=vptr, but
321  // the vptr sanitizer requires RTTI, so this is a user error.
322  D.Diag(diag::err_drv_argument_not_allowed_with)
323  << "-fsanitize=vptr" << NoRTTIArg->getAsString(Args);
324  } else {
325  // The vptr sanitizer requires RTTI, but RTTI is disabled (by
326  // default). Warn that the vptr sanitizer is being disabled.
327  D.Diag(diag::warn_drv_disabling_vptr_no_rtti_default);
328  }
329 
330  // Take out the Vptr sanitizer from the enabled sanitizers
331  AllRemove |= Vptr;
332  }
333 
334  Add = expandSanitizerGroups(Add);
335  // Group expansion may have enabled a sanitizer which is disabled later.
336  Add &= ~AllRemove;
337  // Silently discard any unsupported sanitizers implicitly enabled through
338  // group expansion.
339  Add &= ~InvalidTrappingKinds;
340  if (MinimalRuntime) {
342  }
343  if (CfiCrossDso)
344  Add &= ~CFIMFCall;
345  Add &= Supported;
346 
347  if (Add & Fuzzer)
348  Add |= FuzzerNoLink;
349 
350  // Enable coverage if the fuzzing flag is set.
351  if (Add & FuzzerNoLink) {
352  CoverageFeatures |= CoverageInline8bitCounters | CoverageIndirCall |
354  // Due to TLS differences, stack depth tracking is only enabled on Linux
355  if (TC.getTriple().isOSLinux())
356  CoverageFeatures |= CoverageStackDepth;
357  }
358 
359  Kinds |= Add;
360  } else if (Arg->getOption().matches(options::OPT_fno_sanitize_EQ)) {
361  Arg->claim();
362  SanitizerMask Remove = parseArgValues(D, Arg, true);
363  AllRemove |= expandSanitizerGroups(Remove);
364  }
365  }
366 
367  std::pair<SanitizerMask, SanitizerMask> IncompatibleGroups[] = {
368  std::make_pair(Address, Thread | Memory),
369  std::make_pair(Thread, Memory),
370  std::make_pair(Leak, Thread | Memory),
371  std::make_pair(KernelAddress, Address | Leak | Thread | Memory),
372  std::make_pair(HWAddress, Address | Thread | Memory | KernelAddress),
373  std::make_pair(Efficiency, Address | HWAddress | Leak | Thread | Memory |
374  KernelAddress),
375  std::make_pair(Scudo, Address | HWAddress | Leak | Thread | Memory |
376  KernelAddress | Efficiency),
377  std::make_pair(SafeStack, Address | HWAddress | Leak | Thread | Memory |
378  KernelAddress | Efficiency),
379  std::make_pair(ShadowCallStack, Address | HWAddress | Leak | Thread |
380  Memory | KernelAddress | Efficiency |
381  SafeStack),
382  std::make_pair(KernelHWAddress, Address | HWAddress | Leak | Thread |
383  Memory | KernelAddress | Efficiency |
384  SafeStack | ShadowCallStack),
385  std::make_pair(KernelMemory, Address | HWAddress | Leak | Thread |
386  Memory | KernelAddress | Efficiency |
387  Scudo | SafeStack)};
388  // Enable toolchain specific default sanitizers if not explicitly disabled.
389  SanitizerMask Default = TC.getDefaultSanitizers() & ~AllRemove;
390 
391  // Disable default sanitizers that are incompatible with explicitly requested
392  // ones.
393  for (auto G : IncompatibleGroups) {
394  SanitizerMask Group = G.first;
395  if ((Default & Group) && (Kinds & G.second))
396  Default &= ~Group;
397  }
398 
399  Kinds |= Default;
400 
401  // We disable the vptr sanitizer if it was enabled by group expansion but RTTI
402  // is disabled.
403  if ((Kinds & Vptr) && (RTTIMode == ToolChain::RM_Disabled)) {
404  Kinds &= ~Vptr;
405  }
406 
407  // Check that LTO is enabled if we need it.
408  if ((Kinds & NeedsLTO) && !D.isUsingLTO()) {
409  D.Diag(diag::err_drv_argument_only_allowed_with)
410  << lastArgumentForMask(D, Args, Kinds & NeedsLTO) << "-flto";
411  }
412 
413  if ((Kinds & ShadowCallStack) &&
414  TC.getTriple().getArch() == llvm::Triple::aarch64 &&
415  !llvm::AArch64::isX18ReservedByDefault(TC.getTriple()) &&
416  !Args.hasArg(options::OPT_ffixed_x18)) {
417  D.Diag(diag::err_drv_argument_only_allowed_with)
418  << lastArgumentForMask(D, Args, Kinds & ShadowCallStack)
419  << "-ffixed-x18";
420  }
421 
422  // Report error if there are non-trapping sanitizers that require
423  // c++abi-specific parts of UBSan runtime, and they are not provided by the
424  // toolchain. We don't have a good way to check the latter, so we just
425  // check if the toolchan supports vptr.
426  if (~Supported & Vptr) {
427  SanitizerMask KindsToDiagnose = Kinds & ~TrappingKinds & NeedsUbsanCxxRt;
428  // The runtime library supports the Microsoft C++ ABI, but only well enough
429  // for CFI. FIXME: Remove this once we support vptr on Windows.
430  if (TC.getTriple().isOSWindows())
431  KindsToDiagnose &= ~CFI;
432  if (KindsToDiagnose) {
433  SanitizerSet S;
434  S.Mask = KindsToDiagnose;
435  D.Diag(diag::err_drv_unsupported_opt_for_target)
436  << ("-fno-sanitize-trap=" + toString(S)) << TC.getTriple().str();
437  Kinds &= ~KindsToDiagnose;
438  }
439  }
440 
441  // Warn about incompatible groups of sanitizers.
442  for (auto G : IncompatibleGroups) {
443  SanitizerMask Group = G.first;
444  if (Kinds & Group) {
445  if (SanitizerMask Incompatible = Kinds & G.second) {
446  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
447  << lastArgumentForMask(D, Args, Group)
448  << lastArgumentForMask(D, Args, Incompatible);
449  Kinds &= ~Incompatible;
450  }
451  }
452  }
453  // FIXME: Currently -fsanitize=leak is silently ignored in the presence of
454  // -fsanitize=address. Perhaps it should print an error, or perhaps
455  // -f(-no)sanitize=leak should change whether leak detection is enabled by
456  // default in ASan?
457 
458  // Parse -f(no-)?sanitize-recover flags.
460  SanitizerMask DiagnosedUnrecoverableKinds = 0;
461  SanitizerMask DiagnosedAlwaysRecoverableKinds = 0;
462  for (const auto *Arg : Args) {
463  const char *DeprecatedReplacement = nullptr;
464  if (Arg->getOption().matches(options::OPT_fsanitize_recover)) {
465  DeprecatedReplacement =
466  "-fsanitize-recover=undefined,integer' or '-fsanitize-recover=all";
468  Arg->claim();
469  } else if (Arg->getOption().matches(options::OPT_fno_sanitize_recover)) {
470  DeprecatedReplacement = "-fno-sanitize-recover=undefined,integer' or "
471  "'-fno-sanitize-recover=all";
473  Arg->claim();
474  } else if (Arg->getOption().matches(options::OPT_fsanitize_recover_EQ)) {
475  SanitizerMask Add = parseArgValues(D, Arg, true);
476  // Report error if user explicitly tries to recover from unrecoverable
477  // sanitizer.
478  if (SanitizerMask KindsToDiagnose =
479  Add & Unrecoverable & ~DiagnosedUnrecoverableKinds) {
480  SanitizerSet SetToDiagnose;
481  SetToDiagnose.Mask |= KindsToDiagnose;
482  D.Diag(diag::err_drv_unsupported_option_argument)
483  << Arg->getOption().getName() << toString(SetToDiagnose);
484  DiagnosedUnrecoverableKinds |= KindsToDiagnose;
485  }
486  RecoverableKinds |= expandSanitizerGroups(Add);
487  Arg->claim();
488  } else if (Arg->getOption().matches(options::OPT_fno_sanitize_recover_EQ)) {
489  SanitizerMask Remove = parseArgValues(D, Arg, true);
490  // Report error if user explicitly tries to disable recovery from
491  // always recoverable sanitizer.
492  if (SanitizerMask KindsToDiagnose =
493  Remove & AlwaysRecoverable & ~DiagnosedAlwaysRecoverableKinds) {
494  SanitizerSet SetToDiagnose;
495  SetToDiagnose.Mask |= KindsToDiagnose;
496  D.Diag(diag::err_drv_unsupported_option_argument)
497  << Arg->getOption().getName() << toString(SetToDiagnose);
498  DiagnosedAlwaysRecoverableKinds |= KindsToDiagnose;
499  }
500  RecoverableKinds &= ~expandSanitizerGroups(Remove);
501  Arg->claim();
502  }
503  if (DeprecatedReplacement) {
504  D.Diag(diag::warn_drv_deprecated_arg) << Arg->getAsString(Args)
505  << DeprecatedReplacement;
506  }
507  }
508  RecoverableKinds &= Kinds;
509  RecoverableKinds &= ~Unrecoverable;
510 
511  TrappingKinds &= Kinds;
512  RecoverableKinds &= ~TrappingKinds;
513 
514  // Setup blacklist files.
515  // Add default blacklist from resource directory.
516  addDefaultBlacklists(D, Kinds, BlacklistFiles);
517  // Parse -f(no-)sanitize-blacklist options.
518  for (const auto *Arg : Args) {
519  if (Arg->getOption().matches(options::OPT_fsanitize_blacklist)) {
520  Arg->claim();
521  std::string BLPath = Arg->getValue();
522  if (llvm::sys::fs::exists(BLPath)) {
523  BlacklistFiles.push_back(BLPath);
524  ExtraDeps.push_back(BLPath);
525  } else {
526  D.Diag(clang::diag::err_drv_no_such_file) << BLPath;
527  }
528  } else if (Arg->getOption().matches(options::OPT_fno_sanitize_blacklist)) {
529  Arg->claim();
530  BlacklistFiles.clear();
531  ExtraDeps.clear();
532  }
533  }
534  // Validate blacklists format.
535  {
536  std::string BLError;
537  std::unique_ptr<llvm::SpecialCaseList> SCL(
538  llvm::SpecialCaseList::create(BlacklistFiles, BLError));
539  if (!SCL.get())
540  D.Diag(clang::diag::err_drv_malformed_sanitizer_blacklist) << BLError;
541  }
542 
543  // Parse -f[no-]sanitize-memory-track-origins[=level] options.
544  if (AllAddedKinds & Memory) {
545  if (Arg *A =
546  Args.getLastArg(options::OPT_fsanitize_memory_track_origins_EQ,
547  options::OPT_fsanitize_memory_track_origins,
548  options::OPT_fno_sanitize_memory_track_origins)) {
549  if (A->getOption().matches(options::OPT_fsanitize_memory_track_origins)) {
550  MsanTrackOrigins = 2;
551  } else if (A->getOption().matches(
552  options::OPT_fno_sanitize_memory_track_origins)) {
553  MsanTrackOrigins = 0;
554  } else {
555  StringRef S = A->getValue();
556  if (S.getAsInteger(0, MsanTrackOrigins) || MsanTrackOrigins < 0 ||
557  MsanTrackOrigins > 2) {
558  D.Diag(clang::diag::err_drv_invalid_value) << A->getAsString(Args) << S;
559  }
560  }
561  }
562  MsanUseAfterDtor =
563  Args.hasFlag(options::OPT_fsanitize_memory_use_after_dtor,
564  options::OPT_fno_sanitize_memory_use_after_dtor,
565  MsanUseAfterDtor);
566  NeedPIE |= !(TC.getTriple().isOSLinux() &&
567  TC.getTriple().getArch() == llvm::Triple::x86_64);
568  } else {
569  MsanUseAfterDtor = false;
570  }
571 
572  if (AllAddedKinds & Thread) {
573  TsanMemoryAccess = Args.hasFlag(options::OPT_fsanitize_thread_memory_access,
574  options::OPT_fno_sanitize_thread_memory_access,
575  TsanMemoryAccess);
576  TsanFuncEntryExit = Args.hasFlag(options::OPT_fsanitize_thread_func_entry_exit,
577  options::OPT_fno_sanitize_thread_func_entry_exit,
578  TsanFuncEntryExit);
579  TsanAtomics = Args.hasFlag(options::OPT_fsanitize_thread_atomics,
580  options::OPT_fno_sanitize_thread_atomics,
581  TsanAtomics);
582  }
583 
584  if (AllAddedKinds & CFI) {
585  // Without PIE, external function address may resolve to a PLT record, which
586  // can not be verified by the target module.
587  NeedPIE |= CfiCrossDso;
588  CfiICallGeneralizePointers =
589  Args.hasArg(options::OPT_fsanitize_cfi_icall_generalize_pointers);
590 
591  if (CfiCrossDso && CfiICallGeneralizePointers)
592  D.Diag(diag::err_drv_argument_not_allowed_with)
593  << "-fsanitize-cfi-cross-dso"
594  << "-fsanitize-cfi-icall-generalize-pointers";
595  }
596 
597  Stats = Args.hasFlag(options::OPT_fsanitize_stats,
598  options::OPT_fno_sanitize_stats, false);
599 
600  if (MinimalRuntime) {
601  SanitizerMask IncompatibleMask =
603  if (IncompatibleMask)
604  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
605  << "-fsanitize-minimal-runtime"
606  << lastArgumentForMask(D, Args, IncompatibleMask);
607 
608  SanitizerMask NonTrappingCfi = Kinds & CFI & ~TrappingKinds;
609  if (NonTrappingCfi)
610  D.Diag(clang::diag::err_drv_argument_only_allowed_with)
611  << "fsanitize-minimal-runtime"
612  << "fsanitize-trap=cfi";
613  }
614 
615  // Parse -f(no-)?sanitize-coverage flags if coverage is supported by the
616  // enabled sanitizers.
617  for (const auto *Arg : Args) {
618  if (Arg->getOption().matches(options::OPT_fsanitize_coverage)) {
619  int LegacySanitizeCoverage;
620  if (Arg->getNumValues() == 1 &&
621  !StringRef(Arg->getValue(0))
622  .getAsInteger(0, LegacySanitizeCoverage)) {
623  CoverageFeatures = 0;
624  Arg->claim();
625  if (LegacySanitizeCoverage != 0) {
626  D.Diag(diag::warn_drv_deprecated_arg)
627  << Arg->getAsString(Args) << "-fsanitize-coverage=trace-pc-guard";
628  }
629  continue;
630  }
631  CoverageFeatures |= parseCoverageFeatures(D, Arg);
632 
633  // Disable coverage and not claim the flags if there is at least one
634  // non-supporting sanitizer.
635  if (!(AllAddedKinds & ~AllRemove & ~setGroupBits(SupportsCoverage))) {
636  Arg->claim();
637  } else {
638  CoverageFeatures = 0;
639  }
640  } else if (Arg->getOption().matches(options::OPT_fno_sanitize_coverage)) {
641  Arg->claim();
642  CoverageFeatures &= ~parseCoverageFeatures(D, Arg);
643  }
644  }
645  // Choose at most one coverage type: function, bb, or edge.
646  if ((CoverageFeatures & CoverageFunc) && (CoverageFeatures & CoverageBB))
647  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
648  << "-fsanitize-coverage=func"
649  << "-fsanitize-coverage=bb";
650  if ((CoverageFeatures & CoverageFunc) && (CoverageFeatures & CoverageEdge))
651  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
652  << "-fsanitize-coverage=func"
653  << "-fsanitize-coverage=edge";
654  if ((CoverageFeatures & CoverageBB) && (CoverageFeatures & CoverageEdge))
655  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
656  << "-fsanitize-coverage=bb"
657  << "-fsanitize-coverage=edge";
658  // Basic block tracing and 8-bit counters require some type of coverage
659  // enabled.
660  if (CoverageFeatures & CoverageTraceBB)
661  D.Diag(clang::diag::warn_drv_deprecated_arg)
662  << "-fsanitize-coverage=trace-bb"
663  << "-fsanitize-coverage=trace-pc-guard";
664  if (CoverageFeatures & Coverage8bitCounters)
665  D.Diag(clang::diag::warn_drv_deprecated_arg)
666  << "-fsanitize-coverage=8bit-counters"
667  << "-fsanitize-coverage=trace-pc-guard";
668 
669  int InsertionPointTypes = CoverageFunc | CoverageBB | CoverageEdge;
670  int InstrumentationTypes =
672  if ((CoverageFeatures & InsertionPointTypes) &&
673  !(CoverageFeatures & InstrumentationTypes)) {
674  D.Diag(clang::diag::warn_drv_deprecated_arg)
675  << "-fsanitize-coverage=[func|bb|edge]"
676  << "-fsanitize-coverage=[func|bb|edge],[trace-pc-guard|trace-pc]";
677  }
678 
679  // trace-pc w/o func/bb/edge implies edge.
680  if (!(CoverageFeatures & InsertionPointTypes)) {
681  if (CoverageFeatures &
683  CoverageFeatures |= CoverageEdge;
684 
685  if (CoverageFeatures & CoverageStackDepth)
686  CoverageFeatures |= CoverageFunc;
687  }
688 
689  SharedRuntime =
690  Args.hasFlag(options::OPT_shared_libsan, options::OPT_static_libsan,
691  TC.getTriple().isAndroid() || TC.getTriple().isOSFuchsia() ||
692  TC.getTriple().isOSDarwin());
693 
694  ImplicitCfiRuntime = TC.getTriple().isAndroid();
695 
696  if (AllAddedKinds & Address) {
697  NeedPIE |= TC.getTriple().isOSFuchsia();
698  if (Arg *A =
699  Args.getLastArg(options::OPT_fsanitize_address_field_padding)) {
700  StringRef S = A->getValue();
701  // Legal values are 0 and 1, 2, but in future we may add more levels.
702  if (S.getAsInteger(0, AsanFieldPadding) || AsanFieldPadding < 0 ||
703  AsanFieldPadding > 2) {
704  D.Diag(clang::diag::err_drv_invalid_value) << A->getAsString(Args) << S;
705  }
706  }
707 
708  if (Arg *WindowsDebugRTArg =
709  Args.getLastArg(options::OPT__SLASH_MTd, options::OPT__SLASH_MT,
710  options::OPT__SLASH_MDd, options::OPT__SLASH_MD,
711  options::OPT__SLASH_LDd, options::OPT__SLASH_LD)) {
712  switch (WindowsDebugRTArg->getOption().getID()) {
713  case options::OPT__SLASH_MTd:
714  case options::OPT__SLASH_MDd:
715  case options::OPT__SLASH_LDd:
716  D.Diag(clang::diag::err_drv_argument_not_allowed_with)
717  << WindowsDebugRTArg->getAsString(Args)
718  << lastArgumentForMask(D, Args, Address);
719  D.Diag(clang::diag::note_drv_address_sanitizer_debug_runtime);
720  }
721  }
722 
723  AsanUseAfterScope = Args.hasFlag(
724  options::OPT_fsanitize_address_use_after_scope,
725  options::OPT_fno_sanitize_address_use_after_scope, AsanUseAfterScope);
726 
727  // As a workaround for a bug in gold 2.26 and earlier, dead stripping of
728  // globals in ASan is disabled by default on ELF targets.
729  // See https://sourceware.org/bugzilla/show_bug.cgi?id=19002
730  AsanGlobalsDeadStripping =
731  !TC.getTriple().isOSBinFormatELF() || TC.getTriple().isOSFuchsia() ||
732  Args.hasArg(options::OPT_fsanitize_address_globals_dead_stripping);
733  } else {
734  AsanUseAfterScope = false;
735  }
736 
737  if (AllAddedKinds & SafeStack) {
738  // SafeStack runtime is built into the system on Fuchsia.
739  SafeStackRuntime = !TC.getTriple().isOSFuchsia();
740  }
741 
742  // Parse -link-cxx-sanitizer flag.
743  LinkCXXRuntimes =
744  Args.hasArg(options::OPT_fsanitize_link_cxx_runtime) || D.CCCIsCXX();
745 
746  // Finally, initialize the set of available and recoverable sanitizers.
747  Sanitizers.Mask |= Kinds;
748  RecoverableSanitizers.Mask |= RecoverableKinds;
749  TrapSanitizers.Mask |= TrappingKinds;
750  assert(!(RecoverableKinds & TrappingKinds) &&
751  "Overlap between recoverable and trapping sanitizers");
752 }
753 
754 static std::string toString(const clang::SanitizerSet &Sanitizers) {
755  std::string Res;
756 #define SANITIZER(NAME, ID) \
757  if (Sanitizers.has(ID)) { \
758  if (!Res.empty()) \
759  Res += ","; \
760  Res += NAME; \
761  }
762 #include "clang/Basic/Sanitizers.def"
763  return Res;
764 }
765 
766 static void addIncludeLinkerOption(const ToolChain &TC,
767  const llvm::opt::ArgList &Args,
768  llvm::opt::ArgStringList &CmdArgs,
769  StringRef SymbolName) {
770  SmallString<64> LinkerOptionFlag;
771  LinkerOptionFlag = "--linker-option=/include:";
772  if (TC.getTriple().getArch() == llvm::Triple::x86) {
773  // Win32 mangles C function names with a '_' prefix.
774  LinkerOptionFlag += '_';
775  }
776  LinkerOptionFlag += SymbolName;
777  CmdArgs.push_back(Args.MakeArgString(LinkerOptionFlag));
778 }
779 
780 void SanitizerArgs::addArgs(const ToolChain &TC, const llvm::opt::ArgList &Args,
781  llvm::opt::ArgStringList &CmdArgs,
782  types::ID InputType) const {
783  // NVPTX doesn't currently support sanitizers. Bailing out here means that
784  // e.g. -fsanitize=address applies only to host code, which is what we want
785  // for now.
786  if (TC.getTriple().isNVPTX())
787  return;
788 
789  // Translate available CoverageFeatures to corresponding clang-cc1 flags.
790  // Do it even if Sanitizers.empty() since some forms of coverage don't require
791  // sanitizers.
792  std::pair<int, const char *> CoverageFlags[] = {
793  std::make_pair(CoverageFunc, "-fsanitize-coverage-type=1"),
794  std::make_pair(CoverageBB, "-fsanitize-coverage-type=2"),
795  std::make_pair(CoverageEdge, "-fsanitize-coverage-type=3"),
796  std::make_pair(CoverageIndirCall, "-fsanitize-coverage-indirect-calls"),
797  std::make_pair(CoverageTraceBB, "-fsanitize-coverage-trace-bb"),
798  std::make_pair(CoverageTraceCmp, "-fsanitize-coverage-trace-cmp"),
799  std::make_pair(CoverageTraceDiv, "-fsanitize-coverage-trace-div"),
800  std::make_pair(CoverageTraceGep, "-fsanitize-coverage-trace-gep"),
801  std::make_pair(Coverage8bitCounters, "-fsanitize-coverage-8bit-counters"),
802  std::make_pair(CoverageTracePC, "-fsanitize-coverage-trace-pc"),
803  std::make_pair(CoverageTracePCGuard, "-fsanitize-coverage-trace-pc-guard"),
804  std::make_pair(CoverageInline8bitCounters, "-fsanitize-coverage-inline-8bit-counters"),
805  std::make_pair(CoveragePCTable, "-fsanitize-coverage-pc-table"),
806  std::make_pair(CoverageNoPrune, "-fsanitize-coverage-no-prune"),
807  std::make_pair(CoverageStackDepth, "-fsanitize-coverage-stack-depth")};
808  for (auto F : CoverageFlags) {
809  if (CoverageFeatures & F.first)
810  CmdArgs.push_back(F.second);
811  }
812 
813  if (TC.getTriple().isOSWindows() && needsUbsanRt()) {
814  // Instruct the code generator to embed linker directives in the object file
815  // that cause the required runtime libraries to be linked.
816  CmdArgs.push_back(Args.MakeArgString(
817  "--dependent-lib=" + TC.getCompilerRT(Args, "ubsan_standalone")));
818  if (types::isCXX(InputType))
819  CmdArgs.push_back(Args.MakeArgString(
820  "--dependent-lib=" + TC.getCompilerRT(Args, "ubsan_standalone_cxx")));
821  }
822  if (TC.getTriple().isOSWindows() && needsStatsRt()) {
823  CmdArgs.push_back(Args.MakeArgString("--dependent-lib=" +
824  TC.getCompilerRT(Args, "stats_client")));
825 
826  // The main executable must export the stats runtime.
827  // FIXME: Only exporting from the main executable (e.g. based on whether the
828  // translation unit defines main()) would save a little space, but having
829  // multiple copies of the runtime shouldn't hurt.
830  CmdArgs.push_back(Args.MakeArgString("--dependent-lib=" +
831  TC.getCompilerRT(Args, "stats")));
832  addIncludeLinkerOption(TC, Args, CmdArgs, "__sanitizer_stats_register");
833  }
834 
835  if (Sanitizers.empty())
836  return;
837  CmdArgs.push_back(Args.MakeArgString("-fsanitize=" + toString(Sanitizers)));
838 
839  if (!RecoverableSanitizers.empty())
840  CmdArgs.push_back(Args.MakeArgString("-fsanitize-recover=" +
841  toString(RecoverableSanitizers)));
842 
843  if (!TrapSanitizers.empty())
844  CmdArgs.push_back(
845  Args.MakeArgString("-fsanitize-trap=" + toString(TrapSanitizers)));
846 
847  for (const auto &BLPath : BlacklistFiles) {
848  SmallString<64> BlacklistOpt("-fsanitize-blacklist=");
849  BlacklistOpt += BLPath;
850  CmdArgs.push_back(Args.MakeArgString(BlacklistOpt));
851  }
852  for (const auto &Dep : ExtraDeps) {
853  SmallString<64> ExtraDepOpt("-fdepfile-entry=");
854  ExtraDepOpt += Dep;
855  CmdArgs.push_back(Args.MakeArgString(ExtraDepOpt));
856  }
857 
858  if (MsanTrackOrigins)
859  CmdArgs.push_back(Args.MakeArgString("-fsanitize-memory-track-origins=" +
860  Twine(MsanTrackOrigins)));
861 
862  if (MsanUseAfterDtor)
863  CmdArgs.push_back("-fsanitize-memory-use-after-dtor");
864 
865  // FIXME: Pass these parameters as function attributes, not as -llvm flags.
866  if (!TsanMemoryAccess) {
867  CmdArgs.push_back("-mllvm");
868  CmdArgs.push_back("-tsan-instrument-memory-accesses=0");
869  CmdArgs.push_back("-mllvm");
870  CmdArgs.push_back("-tsan-instrument-memintrinsics=0");
871  }
872  if (!TsanFuncEntryExit) {
873  CmdArgs.push_back("-mllvm");
874  CmdArgs.push_back("-tsan-instrument-func-entry-exit=0");
875  }
876  if (!TsanAtomics) {
877  CmdArgs.push_back("-mllvm");
878  CmdArgs.push_back("-tsan-instrument-atomics=0");
879  }
880 
881  if (CfiCrossDso)
882  CmdArgs.push_back("-fsanitize-cfi-cross-dso");
883 
884  if (CfiICallGeneralizePointers)
885  CmdArgs.push_back("-fsanitize-cfi-icall-generalize-pointers");
886 
887  if (Stats)
888  CmdArgs.push_back("-fsanitize-stats");
889 
890  if (MinimalRuntime)
891  CmdArgs.push_back("-fsanitize-minimal-runtime");
892 
893  if (AsanFieldPadding)
894  CmdArgs.push_back(Args.MakeArgString("-fsanitize-address-field-padding=" +
895  Twine(AsanFieldPadding)));
896 
897  if (AsanUseAfterScope)
898  CmdArgs.push_back("-fsanitize-address-use-after-scope");
899 
900  if (AsanGlobalsDeadStripping)
901  CmdArgs.push_back("-fsanitize-address-globals-dead-stripping");
902 
903  // MSan: Workaround for PR16386.
904  // ASan: This is mainly to help LSan with cases such as
905  // https://github.com/google/sanitizers/issues/373
906  // We can't make this conditional on -fsanitize=leak, as that flag shouldn't
907  // affect compilation.
908  if (Sanitizers.has(Memory) || Sanitizers.has(Address))
909  CmdArgs.push_back("-fno-assume-sane-operator-new");
910 
911  // Require -fvisibility= flag on non-Windows when compiling if vptr CFI is
912  // enabled.
913  if (Sanitizers.hasOneOf(CFIClasses) && !TC.getTriple().isOSWindows() &&
914  !Args.hasArg(options::OPT_fvisibility_EQ)) {
915  TC.getDriver().Diag(clang::diag::err_drv_argument_only_allowed_with)
916  << lastArgumentForMask(TC.getDriver(), Args,
917  Sanitizers.Mask & CFIClasses)
918  << "-fvisibility=";
919  }
920 }
921 
922 SanitizerMask parseArgValues(const Driver &D, const llvm::opt::Arg *A,
923  bool DiagnoseErrors) {
924  assert((A->getOption().matches(options::OPT_fsanitize_EQ) ||
925  A->getOption().matches(options::OPT_fno_sanitize_EQ) ||
926  A->getOption().matches(options::OPT_fsanitize_recover_EQ) ||
927  A->getOption().matches(options::OPT_fno_sanitize_recover_EQ) ||
928  A->getOption().matches(options::OPT_fsanitize_trap_EQ) ||
929  A->getOption().matches(options::OPT_fno_sanitize_trap_EQ)) &&
930  "Invalid argument in parseArgValues!");
931  SanitizerMask Kinds = 0;
932  for (int i = 0, n = A->getNumValues(); i != n; ++i) {
933  const char *Value = A->getValue(i);
935  // Special case: don't accept -fsanitize=all.
936  if (A->getOption().matches(options::OPT_fsanitize_EQ) &&
937  0 == strcmp("all", Value))
938  Kind = 0;
939  // Similarly, don't accept -fsanitize=efficiency-all.
940  else if (A->getOption().matches(options::OPT_fsanitize_EQ) &&
941  0 == strcmp("efficiency-all", Value))
942  Kind = 0;
943  else
944  Kind = parseSanitizerValue(Value, /*AllowGroups=*/true);
945 
946  if (Kind)
947  Kinds |= Kind;
948  else if (DiagnoseErrors)
949  D.Diag(clang::diag::err_drv_unsupported_option_argument)
950  << A->getOption().getName() << Value;
951  }
952  return Kinds;
953 }
954 
955 int parseCoverageFeatures(const Driver &D, const llvm::opt::Arg *A) {
956  assert(A->getOption().matches(options::OPT_fsanitize_coverage) ||
957  A->getOption().matches(options::OPT_fno_sanitize_coverage));
958  int Features = 0;
959  for (int i = 0, n = A->getNumValues(); i != n; ++i) {
960  const char *Value = A->getValue(i);
961  int F = llvm::StringSwitch<int>(Value)
962  .Case("func", CoverageFunc)
963  .Case("bb", CoverageBB)
964  .Case("edge", CoverageEdge)
965  .Case("indirect-calls", CoverageIndirCall)
966  .Case("trace-bb", CoverageTraceBB)
967  .Case("trace-cmp", CoverageTraceCmp)
968  .Case("trace-div", CoverageTraceDiv)
969  .Case("trace-gep", CoverageTraceGep)
970  .Case("8bit-counters", Coverage8bitCounters)
971  .Case("trace-pc", CoverageTracePC)
972  .Case("trace-pc-guard", CoverageTracePCGuard)
973  .Case("no-prune", CoverageNoPrune)
974  .Case("inline-8bit-counters", CoverageInline8bitCounters)
975  .Case("pc-table", CoveragePCTable)
976  .Case("stack-depth", CoverageStackDepth)
977  .Default(0);
978  if (F == 0)
979  D.Diag(clang::diag::err_drv_unsupported_option_argument)
980  << A->getOption().getName() << Value;
981  Features |= F;
982  }
983  return Features;
984 }
985 
986 std::string lastArgumentForMask(const Driver &D, const llvm::opt::ArgList &Args,
987  SanitizerMask Mask) {
988  for (llvm::opt::ArgList::const_reverse_iterator I = Args.rbegin(),
989  E = Args.rend();
990  I != E; ++I) {
991  const auto *Arg = *I;
992  if (Arg->getOption().matches(options::OPT_fsanitize_EQ)) {
993  SanitizerMask AddKinds =
994  expandSanitizerGroups(parseArgValues(D, Arg, false));
995  if (AddKinds & Mask)
996  return describeSanitizeArg(Arg, Mask);
997  } else if (Arg->getOption().matches(options::OPT_fno_sanitize_EQ)) {
998  SanitizerMask RemoveKinds =
999  expandSanitizerGroups(parseArgValues(D, Arg, false));
1000  Mask &= ~RemoveKinds;
1001  }
1002  }
1003  llvm_unreachable("arg list didn't provide expected value");
1004 }
1005 
1006 std::string describeSanitizeArg(const llvm::opt::Arg *A, SanitizerMask Mask) {
1007  assert(A->getOption().matches(options::OPT_fsanitize_EQ)
1008  && "Invalid argument in describeSanitizerArg!");
1009 
1010  std::string Sanitizers;
1011  for (int i = 0, n = A->getNumValues(); i != n; ++i) {
1013  parseSanitizerValue(A->getValue(i), /*AllowGroups=*/true)) &
1014  Mask) {
1015  if (!Sanitizers.empty())
1016  Sanitizers += ",";
1017  Sanitizers += A->getValue(i);
1018  }
1019  }
1020 
1021  assert(!Sanitizers.empty() && "arg didn't provide expected value");
1022  return "-fsanitize=" + Sanitizers;
1023 }
bool isUsingLTO() const
Returns true if we are performing any kind of LTO.
Definition: Driver.h:518
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:237
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:184
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:547
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:240
const llvm::Triple & getTriple() const
Definition: ToolChain.h:186
virtual SanitizerMask getSupportedSanitizers() const
Return sanitizers which are available in this toolchain.
Definition: ToolChain.cpp:814
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:87
std::string ResourceDir
The path to the compiler resource directory.
Definition: Driver.h:132