libsanitizer/ubsan/ubsan_handlers.cc

   1 //===-- ubsan_handlers.cc -------------------------------------------------===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // Error logging entry points for the UBSan runtime.
   9 //
  10 //===----------------------------------------------------------------------===//
  11
  12 #include "ubsan_platform.h"
  13 #if CAN_SANITIZE_UB
  14 #include "ubsan_handlers.h"
  15 #include "ubsan_diag.h"
  16
  17 #include "sanitizer_common/sanitizer_common.h"
  18
  19 using namespace __sanitizer;
  20 using namespace __ubsan;
  21
  22 namespace __ubsan {
  23 bool ignoreReport(SourceLocation SLoc, ReportOptions Opts, ErrorType ET) {
  24   // We are not allowed to skip error report: if we are in unrecoverable
  25   // handler, we have to terminate the program right now, and therefore
  26   // have to print some diagnostic.
  27   //
  28   // Even if source location is disabled, it doesn't mean that we have
  29   // already report an error to the user: some concurrently running
  30   // thread could have acquired it, but not yet printed the report.
  31   if (Opts.FromUnrecoverableHandler)
  32     return false;
  33   return SLoc.isDisabled() || IsPCSuppressed(ET, Opts.pc, SLoc.getFilename());
  34 }
  35
  36 const char *TypeCheckKinds[] = {
  37     "load of", "store to", "reference binding to", "member access within",
  38     "member call on", "constructor call on", "downcast of", "downcast of",
  39     "upcast of", "cast to virtual base of"};
  40 }
  41
  42 static void handleTypeMismatchImpl(TypeMismatchData *Data, ValueHandle Pointer,
  43                                    ReportOptions Opts) {
  44   Location Loc = Data->Loc.acquire();
  45
  46   ErrorType ET;
  47   if (!Pointer)
  48     ET = ErrorType::NullPointerUse;
  49   else if (Data->Alignment && (Pointer & (Data->Alignment - 1)))
  50     ET = ErrorType::MisalignedPointerUse;
  51   else
  52     ET = ErrorType::InsufficientObjectSize;
  53
  54   // Use the SourceLocation from Data to track deduplication, even if it's
  55   // invalid.
  56   if (ignoreReport(Loc.getSourceLocation(), Opts, ET))
  57     return;
  58
  59   SymbolizedStackHolder FallbackLoc;
  60   if (Data->Loc.isInvalid()) {
  61     FallbackLoc.reset(getCallerLocation(Opts.pc));
  62     Loc = FallbackLoc;
  63   }
  64
  65   ScopedReport R(Opts, Loc, ET);
  66
  67   switch (ET) {
  68   case ErrorType::NullPointerUse:
  69     Diag(Loc, DL_Error, "%0 null pointer of type %1")
  70         << TypeCheckKinds[Data->TypeCheckKind] << Data->Type;
  71     break;
  72   case ErrorType::MisalignedPointerUse:
  73     Diag(Loc, DL_Error, "%0 misaligned address %1 for type %3, "
  74                         "which requires %2 byte alignment")
  75         << TypeCheckKinds[Data->TypeCheckKind] << (void *)Pointer
  76         << Data->Alignment << Data->Type;
  77     break;
  78   case ErrorType::InsufficientObjectSize:
  79     Diag(Loc, DL_Error, "%0 address %1 with insufficient space "
  80                         "for an object of type %2")
  81         << TypeCheckKinds[Data->TypeCheckKind] << (void *)Pointer << Data->Type;
  82     break;
  83   default:
  84     UNREACHABLE("unexpected error type!");
  85   }
  86
  87   if (Pointer)
  88     Diag(Pointer, DL_Note, "pointer points here");
  89 }
  90
  91 void __ubsan::__ubsan_handle_type_mismatch(TypeMismatchData *Data,
  92                                            ValueHandle Pointer) {
  93   GET_REPORT_OPTIONS(false);
  94   handleTypeMismatchImpl(Data, Pointer, Opts);
  95 }
  96 void __ubsan::__ubsan_handle_type_mismatch_abort(TypeMismatchData *Data,
  97                                                  ValueHandle Pointer) {
  98   GET_REPORT_OPTIONS(true);
  99   handleTypeMismatchImpl(Data, Pointer, Opts);
 100   Die();
 101 }
 102
 103 /// \brief Common diagnostic emission for various forms of integer overflow.
 104 template <typename T>
 105 static void handleIntegerOverflowImpl(OverflowData *Data, ValueHandle LHS,
 106                                       const char *Operator, T RHS,
 107                                       ReportOptions Opts) {
 108   SourceLocation Loc = Data->Loc.acquire();
 109   bool IsSigned = Data->Type.isSignedIntegerTy();
 110   ErrorType ET = IsSigned ? ErrorType::SignedIntegerOverflow
 111                           : ErrorType::UnsignedIntegerOverflow;
 112
 113   if (ignoreReport(Loc, Opts, ET))
 114     return;
 115
 116   ScopedReport R(Opts, Loc, ET);
 117
 118   Diag(Loc, DL_Error, "%0 integer overflow: "
 119                       "%1 %2 %3 cannot be represented in type %4")
 120     << (IsSigned ? "signed" : "unsigned")
 121     << Value(Data->Type, LHS) << Operator << RHS << Data->Type;
 122 }
 123
 124 #define UBSAN_OVERFLOW_HANDLER(handler_name, op, unrecoverable)                \
 125   void __ubsan::handler_name(OverflowData *Data, ValueHandle LHS,              \
 126                              ValueHandle RHS) {                                \
 127     GET_REPORT_OPTIONS(unrecoverable);                                         \
 128     handleIntegerOverflowImpl(Data, LHS, op, Value(Data->Type, RHS), Opts);    \
 129     if (unrecoverable)                                                         \
 130       Die();                                                                   \
 131   }
 132
 133 UBSAN_OVERFLOW_HANDLER(__ubsan_handle_add_overflow, "+", false)
 134 UBSAN_OVERFLOW_HANDLER(__ubsan_handle_add_overflow_abort, "+", true)
 135 UBSAN_OVERFLOW_HANDLER(__ubsan_handle_sub_overflow, "-", false)
 136 UBSAN_OVERFLOW_HANDLER(__ubsan_handle_sub_overflow_abort, "-", true)
 137 UBSAN_OVERFLOW_HANDLER(__ubsan_handle_mul_overflow, "*", false)
 138 UBSAN_OVERFLOW_HANDLER(__ubsan_handle_mul_overflow_abort, "*", true)
 139
 140 static void handleNegateOverflowImpl(OverflowData *Data, ValueHandle OldVal,
 141                                      ReportOptions Opts) {
 142   SourceLocation Loc = Data->Loc.acquire();
 143   bool IsSigned = Data->Type.isSignedIntegerTy();
 144   ErrorType ET = IsSigned ? ErrorType::SignedIntegerOverflow
 145                           : ErrorType::UnsignedIntegerOverflow;
 146
 147   if (ignoreReport(Loc, Opts, ET))
 148     return;
 149
 150   ScopedReport R(Opts, Loc, ET);
 151
 152   if (IsSigned)
 153     Diag(Loc, DL_Error,
 154          "negation of %0 cannot be represented in type %1; "
 155          "cast to an unsigned type to negate this value to itself")
 156         << Value(Data->Type, OldVal) << Data->Type;
 157   else
 158     Diag(Loc, DL_Error, "negation of %0 cannot be represented in type %1")
 159         << Value(Data->Type, OldVal) << Data->Type;
 160 }
 161
 162 void __ubsan::__ubsan_handle_negate_overflow(OverflowData *Data,
 163                                              ValueHandle OldVal) {
 164   GET_REPORT_OPTIONS(false);
 165   handleNegateOverflowImpl(Data, OldVal, Opts);
 166 }
 167 void __ubsan::__ubsan_handle_negate_overflow_abort(OverflowData *Data,
 168                                                     ValueHandle OldVal) {
 169   GET_REPORT_OPTIONS(true);
 170   handleNegateOverflowImpl(Data, OldVal, Opts);
 171   Die();
 172 }
 173
 174 static void handleDivremOverflowImpl(OverflowData *Data, ValueHandle LHS,
 175                                      ValueHandle RHS, ReportOptions Opts) {
 176   SourceLocation Loc = Data->Loc.acquire();
 177   Value LHSVal(Data->Type, LHS);
 178   Value RHSVal(Data->Type, RHS);
 179
 180   ErrorType ET;
 181   if (RHSVal.isMinusOne())
 182     ET = ErrorType::SignedIntegerOverflow;
 183   else if (Data->Type.isIntegerTy())
 184     ET = ErrorType::IntegerDivideByZero;
 185   else
 186     ET = ErrorType::FloatDivideByZero;
 187
 188   if (ignoreReport(Loc, Opts, ET))
 189     return;
 190
 191   ScopedReport R(Opts, Loc, ET);
 192
 193   switch (ET) {
 194   case ErrorType::SignedIntegerOverflow:
 195     Diag(Loc, DL_Error, "division of %0 by -1 cannot be represented in type %1")
 196         << LHSVal << Data->Type;
 197     break;
 198   default:
 199     Diag(Loc, DL_Error, "division by zero");
 200     break;
 201   }
 202 }
 203
 204 void __ubsan::__ubsan_handle_divrem_overflow(OverflowData *Data,
 205                                              ValueHandle LHS, ValueHandle RHS) {
 206   GET_REPORT_OPTIONS(false);
 207   handleDivremOverflowImpl(Data, LHS, RHS, Opts);
 208 }
 209 void __ubsan::__ubsan_handle_divrem_overflow_abort(OverflowData *Data,
 210                                                     ValueHandle LHS,
 211                                                     ValueHandle RHS) {
 212   GET_REPORT_OPTIONS(true);
 213   handleDivremOverflowImpl(Data, LHS, RHS, Opts);
 214   Die();
 215 }
 216
 217 static void handleShiftOutOfBoundsImpl(ShiftOutOfBoundsData *Data,
 218                                        ValueHandle LHS, ValueHandle RHS,
 219                                        ReportOptions Opts) {
 220   SourceLocation Loc = Data->Loc.acquire();
 221   Value LHSVal(Data->LHSType, LHS);
 222   Value RHSVal(Data->RHSType, RHS);
 223
 224   ErrorType ET;
 225   if (RHSVal.isNegative() ||
 226       RHSVal.getPositiveIntValue() >= Data->LHSType.getIntegerBitWidth())
 227     ET = ErrorType::InvalidShiftExponent;
 228   else
 229     ET = ErrorType::InvalidShiftBase;
 230
 231   if (ignoreReport(Loc, Opts, ET))
 232     return;
 233
 234   ScopedReport R(Opts, Loc, ET);
 235
 236   if (ET == ErrorType::InvalidShiftExponent) {
 237     if (RHSVal.isNegative())
 238       Diag(Loc, DL_Error, "shift exponent %0 is negative") << RHSVal;
 239     else
 240       Diag(Loc, DL_Error, "shift exponent %0 is too large for %1-bit type %2")
 241           << RHSVal << Data->LHSType.getIntegerBitWidth() << Data->LHSType;
 242   } else {
 243     if (LHSVal.isNegative())
 244       Diag(Loc, DL_Error, "left shift of negative value %0") << LHSVal;
 245     else
 246       Diag(Loc, DL_Error,
 247            "left shift of %0 by %1 places cannot be represented in type %2")
 248           << LHSVal << RHSVal << Data->LHSType;
 249   }
 250 }
 251
 252 void __ubsan::__ubsan_handle_shift_out_of_bounds(ShiftOutOfBoundsData *Data,
 253                                                  ValueHandle LHS,
 254                                                  ValueHandle RHS) {
 255   GET_REPORT_OPTIONS(false);
 256   handleShiftOutOfBoundsImpl(Data, LHS, RHS, Opts);
 257 }
 258 void __ubsan::__ubsan_handle_shift_out_of_bounds_abort(
 259                                                      ShiftOutOfBoundsData *Data,
 260                                                      ValueHandle LHS,
 261                                                      ValueHandle RHS) {
 262   GET_REPORT_OPTIONS(true);
 263   handleShiftOutOfBoundsImpl(Data, LHS, RHS, Opts);
 264   Die();
 265 }
 266
 267 static void handleOutOfBoundsImpl(OutOfBoundsData *Data, ValueHandle Index,
 268                                   ReportOptions Opts) {
 269   SourceLocation Loc = Data->Loc.acquire();
 270   ErrorType ET = ErrorType::OutOfBoundsIndex;
 271
 272   if (ignoreReport(Loc, Opts, ET))
 273     return;
 274
 275   ScopedReport R(Opts, Loc, ET);
 276
 277   Value IndexVal(Data->IndexType, Index);
 278   Diag(Loc, DL_Error, "index %0 out of bounds for type %1")
 279     << IndexVal << Data->ArrayType;
 280 }
 281
 282 void __ubsan::__ubsan_handle_out_of_bounds(OutOfBoundsData *Data,
 283                                            ValueHandle Index) {
 284   GET_REPORT_OPTIONS(false);
 285   handleOutOfBoundsImpl(Data, Index, Opts);
 286 }
 287 void __ubsan::__ubsan_handle_out_of_bounds_abort(OutOfBoundsData *Data,
 288                                                  ValueHandle Index) {
 289   GET_REPORT_OPTIONS(true);
 290   handleOutOfBoundsImpl(Data, Index, Opts);
 291   Die();
 292 }
 293
 294 static void handleBuiltinUnreachableImpl(UnreachableData *Data,
 295                                          ReportOptions Opts) {
 296   ScopedReport R(Opts, Data->Loc, ErrorType::UnreachableCall);
 297   Diag(Data->Loc, DL_Error, "execution reached a __builtin_unreachable() call");
 298 }
 299
 300 void __ubsan::__ubsan_handle_builtin_unreachable(UnreachableData *Data) {
 301   GET_REPORT_OPTIONS(true);
 302   handleBuiltinUnreachableImpl(Data, Opts);
 303   Die();
 304 }
 305
 306 static void handleMissingReturnImpl(UnreachableData *Data, ReportOptions Opts) {
 307   ScopedReport R(Opts, Data->Loc, ErrorType::MissingReturn);
 308   Diag(Data->Loc, DL_Error,
 309        "execution reached the end of a value-returning function "
 310        "without returning a value");
 311 }
 312
 313 void __ubsan::__ubsan_handle_missing_return(UnreachableData *Data) {
 314   GET_REPORT_OPTIONS(true);
 315   handleMissingReturnImpl(Data, Opts);
 316   Die();
 317 }
 318
 319 static void handleVLABoundNotPositive(VLABoundData *Data, ValueHandle Bound,
 320                                       ReportOptions Opts) {
 321   SourceLocation Loc = Data->Loc.acquire();
 322   ErrorType ET = ErrorType::NonPositiveVLAIndex;
 323
 324   if (ignoreReport(Loc, Opts, ET))
 325     return;
 326
 327   ScopedReport R(Opts, Loc, ET);
 328
 329   Diag(Loc, DL_Error, "variable length array bound evaluates to "
 330                       "non-positive value %0")
 331     << Value(Data->Type, Bound);
 332 }
 333
 334 void __ubsan::__ubsan_handle_vla_bound_not_positive(VLABoundData *Data,
 335                                                     ValueHandle Bound) {
 336   GET_REPORT_OPTIONS(false);
 337   handleVLABoundNotPositive(Data, Bound, Opts);
 338 }
 339 void __ubsan::__ubsan_handle_vla_bound_not_positive_abort(VLABoundData *Data,
 340                                                           ValueHandle Bound) {
 341   GET_REPORT_OPTIONS(true);
 342   handleVLABoundNotPositive(Data, Bound, Opts);
 343   Die();
 344 }
 345
 346 static bool looksLikeFloatCastOverflowDataV1(void *Data) {
 347   // First field is either a pointer to filename or a pointer to a
 348   // TypeDescriptor.
 349   u8 *FilenameOrTypeDescriptor;
 350   internal_memcpy(&FilenameOrTypeDescriptor, Data,
 351                   sizeof(FilenameOrTypeDescriptor));
 352
 353   // Heuristic: For float_cast_overflow, the TypeKind will be either TK_Integer
 354   // (0x0), TK_Float (0x1) or TK_Unknown (0xff). If both types are known,
 355   // adding both bytes will be 0 or 1 (for BE or LE). If it were a filename,
 356   // adding two printable characters will not yield such a value. Otherwise,
 357   // if one of them is 0xff, this is most likely TK_Unknown type descriptor.
 358   u16 MaybeFromTypeKind =
 359       FilenameOrTypeDescriptor[0] + FilenameOrTypeDescriptor[1];
 360   return MaybeFromTypeKind < 2 || FilenameOrTypeDescriptor[0] == 0xff ||
 361          FilenameOrTypeDescriptor[1] == 0xff;
 362 }
 363
 364 static void handleFloatCastOverflow(void *DataPtr, ValueHandle From,
 365                                     ReportOptions Opts) {
 366   SymbolizedStackHolder CallerLoc;
 367   Location Loc;
 368   const TypeDescriptor *FromType, *ToType;
 369   ErrorType ET = ErrorType::FloatCastOverflow;
 370
 371   if (looksLikeFloatCastOverflowDataV1(DataPtr)) {
 372     auto Data = reinterpret_cast<FloatCastOverflowData *>(DataPtr);
 373     CallerLoc.reset(getCallerLocation(Opts.pc));
 374     Loc = CallerLoc;
 375     FromType = &Data->FromType;
 376     ToType = &Data->ToType;
 377   } else {
 378     auto Data = reinterpret_cast<FloatCastOverflowDataV2 *>(DataPtr);
 379     SourceLocation SLoc = Data->Loc.acquire();
 380     if (ignoreReport(SLoc, Opts, ET))
 381       return;
 382     Loc = SLoc;
 383     FromType = &Data->FromType;
 384     ToType = &Data->ToType;
 385   }
 386
 387   ScopedReport R(Opts, Loc, ET);
 388
 389   Diag(Loc, DL_Error,
 390        "value %0 is outside the range of representable values of type %2")
 391       << Value(*FromType, From) << *FromType << *ToType;
 392 }
 393
 394 void __ubsan::__ubsan_handle_float_cast_overflow(void *Data, ValueHandle From) {
 395   GET_REPORT_OPTIONS(false);
 396   handleFloatCastOverflow(Data, From, Opts);
 397 }
 398 void __ubsan::__ubsan_handle_float_cast_overflow_abort(void *Data,
 399                                                        ValueHandle From) {
 400   GET_REPORT_OPTIONS(true);
 401   handleFloatCastOverflow(Data, From, Opts);
 402   Die();
 403 }
 404
 405 static void handleLoadInvalidValue(InvalidValueData *Data, ValueHandle Val,
 406                                    ReportOptions Opts) {
 407   SourceLocation Loc = Data->Loc.acquire();
 408   // This check could be more precise if we used different handlers for
 409   // -fsanitize=bool and -fsanitize=enum.
 410   bool IsBool = (0 == internal_strcmp(Data->Type.getTypeName(), "'bool'"));
 411   ErrorType ET =
 412       IsBool ? ErrorType::InvalidBoolLoad : ErrorType::InvalidEnumLoad;
 413
 414   if (ignoreReport(Loc, Opts, ET))
 415     return;
 416
 417   ScopedReport R(Opts, Loc, ET);
 418
 419   Diag(Loc, DL_Error,
 420        "load of value %0, which is not a valid value for type %1")
 421     << Value(Data->Type, Val) << Data->Type;
 422 }
 423
 424 void __ubsan::__ubsan_handle_load_invalid_value(InvalidValueData *Data,
 425                                                 ValueHandle Val) {
 426   GET_REPORT_OPTIONS(false);
 427   handleLoadInvalidValue(Data, Val, Opts);
 428 }
 429 void __ubsan::__ubsan_handle_load_invalid_value_abort(InvalidValueData *Data,
 430                                                       ValueHandle Val) {
 431   GET_REPORT_OPTIONS(true);
 432   handleLoadInvalidValue(Data, Val, Opts);
 433   Die();
 434 }
 435
 436 static void handleFunctionTypeMismatch(FunctionTypeMismatchData *Data,
 437                                        ValueHandle Function,
 438                                        ReportOptions Opts) {
 439   SourceLocation CallLoc = Data->Loc.acquire();
 440   ErrorType ET = ErrorType::FunctionTypeMismatch;
 441
 442   if (ignoreReport(CallLoc, Opts, ET))
 443     return;
 444
 445   ScopedReport R(Opts, CallLoc, ET);
 446
 447   SymbolizedStackHolder FLoc(getSymbolizedLocation(Function));
 448   const char *FName = FLoc.get()->info.function;
 449   if (!FName)
 450     FName = "(unknown)";
 451
 452   Diag(CallLoc, DL_Error,
 453        "call to function %0 through pointer to incorrect function type %1")
 454       << FName << Data->Type;
 455   Diag(FLoc, DL_Note, "%0 defined here") << FName;
 456 }
 457
 458 void
 459 __ubsan::__ubsan_handle_function_type_mismatch(FunctionTypeMismatchData *Data,
 460                                                ValueHandle Function) {
 461   GET_REPORT_OPTIONS(false);
 462   handleFunctionTypeMismatch(Data, Function, Opts);
 463 }
 464
 465 void __ubsan::__ubsan_handle_function_type_mismatch_abort(
 466     FunctionTypeMismatchData *Data, ValueHandle Function) {
 467   GET_REPORT_OPTIONS(true);
 468   handleFunctionTypeMismatch(Data, Function, Opts);
 469   Die();
 470 }
 471
 472 static void handleNonNullReturn(NonNullReturnData *Data, ReportOptions Opts) {
 473   SourceLocation Loc = Data->Loc.acquire();
 474   ErrorType ET = ErrorType::InvalidNullReturn;
 475
 476   if (ignoreReport(Loc, Opts, ET))
 477     return;
 478
 479   ScopedReport R(Opts, Loc, ET);
 480
 481   Diag(Loc, DL_Error, "null pointer returned from function declared to never "
 482                       "return null");
 483   if (!Data->AttrLoc.isInvalid())
 484     Diag(Data->AttrLoc, DL_Note, "returns_nonnull attribute specified here");
 485 }
 486
 487 void __ubsan::__ubsan_handle_nonnull_return(NonNullReturnData *Data) {
 488   GET_REPORT_OPTIONS(false);
 489   handleNonNullReturn(Data, Opts);
 490 }
 491
 492 void __ubsan::__ubsan_handle_nonnull_return_abort(NonNullReturnData *Data) {
 493   GET_REPORT_OPTIONS(true);
 494   handleNonNullReturn(Data, Opts);
 495   Die();
 496 }
 497
 498 static void handleNonNullArg(NonNullArgData *Data, ReportOptions Opts) {
 499   SourceLocation Loc = Data->Loc.acquire();
 500   ErrorType ET = ErrorType::InvalidNullArgument;
 501
 502   if (ignoreReport(Loc, Opts, ET))
 503     return;
 504
 505   ScopedReport R(Opts, Loc, ET);
 506
 507   Diag(Loc, DL_Error, "null pointer passed as argument %0, which is declared to "
 508        "never be null") << Data->ArgIndex;
 509   if (!Data->AttrLoc.isInvalid())
 510     Diag(Data->AttrLoc, DL_Note, "nonnull attribute specified here");
 511 }
 512
 513 void __ubsan::__ubsan_handle_nonnull_arg(NonNullArgData *Data) {
 514   GET_REPORT_OPTIONS(false);
 515   handleNonNullArg(Data, Opts);
 516 }
 517
 518 void __ubsan::__ubsan_handle_nonnull_arg_abort(NonNullArgData *Data) {
 519   GET_REPORT_OPTIONS(true);
 520   handleNonNullArg(Data, Opts);
 521   Die();
 522 }
 523
 524 static void handleCFIBadIcall(CFICheckFailData *Data, ValueHandle Function,
 525                               ReportOptions Opts) {
 526   if (Data->CheckKind != CFITCK_ICall)
 527     Die();
 528
 529   SourceLocation Loc = Data->Loc.acquire();
 530   ErrorType ET = ErrorType::CFIBadType;
 531
 532   if (ignoreReport(Loc, Opts, ET))
 533     return;
 534
 535   ScopedReport R(Opts, Loc, ET);
 536
 537   Diag(Loc, DL_Error, "control flow integrity check for type %0 failed during "
 538                       "indirect function call")
 539       << Data->Type;
 540
 541   SymbolizedStackHolder FLoc(getSymbolizedLocation(Function));
 542   const char *FName = FLoc.get()->info.function;
 543   if (!FName)
 544     FName = "(unknown)";
 545   Diag(FLoc, DL_Note, "%0 defined here") << FName;
 546 }
 547
 548 namespace __ubsan {
 549 #ifdef UBSAN_CAN_USE_CXXABI
 550 SANITIZER_WEAK_ATTRIBUTE
 551 void HandleCFIBadType(CFICheckFailData *Data, ValueHandle Vtable,
 552                       bool ValidVtable, ReportOptions Opts);
 553 #else
 554 static void HandleCFIBadType(CFICheckFailData *Data, ValueHandle Vtable,
 555                              bool ValidVtable, ReportOptions Opts) {
 556   Die();
 557 }
 558 #endif
 559 }  // namespace __ubsan
 560
 561 void __ubsan::__ubsan_handle_cfi_bad_icall(CFIBadIcallData *CallData,
 562                                            ValueHandle Function) {
 563   GET_REPORT_OPTIONS(false);
 564   CFICheckFailData Data = {CFITCK_ICall, CallData->Loc, CallData->Type};
 565   handleCFIBadIcall(&Data, Function, Opts);
 566 }
 567
 568 void __ubsan::__ubsan_handle_cfi_bad_icall_abort(CFIBadIcallData *CallData,
 569                                                  ValueHandle Function) {
 570   GET_REPORT_OPTIONS(true);
 571   CFICheckFailData Data = {CFITCK_ICall, CallData->Loc, CallData->Type};
 572   handleCFIBadIcall(&Data, Function, Opts);
 573   Die();
 574 }
 575
 576 void __ubsan::__ubsan_handle_cfi_check_fail(CFICheckFailData *Data,
 577                                             ValueHandle Value,
 578                                             uptr ValidVtable) {
 579   GET_REPORT_OPTIONS(false);
 580   if (Data->CheckKind == CFITCK_ICall)
 581     handleCFIBadIcall(Data, Value, Opts);
 582   else
 583     HandleCFIBadType(Data, Value, ValidVtable, Opts);
 584 }
 585
 586 void __ubsan::__ubsan_handle_cfi_check_fail_abort(CFICheckFailData *Data,
 587                                                   ValueHandle Value,
 588                                                   uptr ValidVtable) {
 589   GET_REPORT_OPTIONS(true);
 590   if (Data->CheckKind == CFITCK_ICall)
 591     handleCFIBadIcall(Data, Value, Opts);
 592   else
 593     HandleCFIBadType(Data, Value, ValidVtable, Opts);
 594   Die();
 595 }
 596
 597 #endif  // CAN_SANITIZE_UB