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//===-- ubsan_handlers.h ----------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Entry points to the runtime library for Clang's undefined behavior sanitizer.
//
//===----------------------------------------------------------------------===//
#ifndef UBSAN_HANDLERS_H
#define UBSAN_HANDLERS_H
#include "ubsan_value.h"
namespace __ubsan {
struct TypeMismatchData {
SourceLocation Loc;
const TypeDescriptor &Type;
unsigned char LogAlignment;
unsigned char TypeCheckKind;
};
#define UNRECOVERABLE(checkname, ...) \
extern "C" SANITIZER_INTERFACE_ATTRIBUTE NORETURN \
void __ubsan_handle_ ## checkname( __VA_ARGS__ );
#define RECOVERABLE(checkname, ...) \
extern "C" SANITIZER_INTERFACE_ATTRIBUTE \
void __ubsan_handle_ ## checkname( __VA_ARGS__ ); \
extern "C" SANITIZER_INTERFACE_ATTRIBUTE NORETURN \
void __ubsan_handle_ ## checkname ## _abort( __VA_ARGS__ );
/// \brief Handle a runtime type check failure, caused by either a misaligned
/// pointer, a null pointer, or a pointer to insufficient storage for the
/// type.
RECOVERABLE(type_mismatch_v1, TypeMismatchData *Data, ValueHandle Pointer)
struct AlignmentAssumptionData {
SourceLocation Loc;
SourceLocation AssumptionLoc;
const TypeDescriptor &Type;
};
/// \brief Handle a runtime alignment assumption check failure,
/// caused by a misaligned pointer.
RECOVERABLE(alignment_assumption, AlignmentAssumptionData *Data,
ValueHandle Pointer, ValueHandle Alignment, ValueHandle Offset)
struct OverflowData {
SourceLocation Loc;
const TypeDescriptor &Type;
};
/// \brief Handle an integer addition overflow.
RECOVERABLE(add_overflow, OverflowData *Data, ValueHandle LHS, ValueHandle RHS)
/// \brief Handle an integer subtraction overflow.
RECOVERABLE(sub_overflow, OverflowData *Data, ValueHandle LHS, ValueHandle RHS)
/// \brief Handle an integer multiplication overflow.
RECOVERABLE(mul_overflow, OverflowData *Data, ValueHandle LHS, ValueHandle RHS)
/// \brief Handle a signed integer overflow for a unary negate operator.
RECOVERABLE(negate_overflow, OverflowData *Data, ValueHandle OldVal)
/// \brief Handle an INT_MIN/-1 overflow or division by zero.
RECOVERABLE(divrem_overflow, OverflowData *Data,
ValueHandle LHS, ValueHandle RHS)
struct ShiftOutOfBoundsData {
SourceLocation Loc;
const TypeDescriptor &LHSType;
const TypeDescriptor &RHSType;
};
/// \brief Handle a shift where the RHS is out of bounds or a left shift where
/// the LHS is negative or overflows.
RECOVERABLE(shift_out_of_bounds, ShiftOutOfBoundsData *Data,
ValueHandle LHS, ValueHandle RHS)
struct OutOfBoundsData {
SourceLocation Loc;
const TypeDescriptor &ArrayType;
const TypeDescriptor &IndexType;
};
/// \brief Handle an array index out of bounds error.
RECOVERABLE(out_of_bounds, OutOfBoundsData *Data, ValueHandle Index)
struct UnreachableData {
SourceLocation Loc;
};
/// \brief Handle a __builtin_unreachable which is reached.
UNRECOVERABLE(builtin_unreachable, UnreachableData *Data)
/// \brief Handle reaching the end of a value-returning function.
UNRECOVERABLE(missing_return, UnreachableData *Data)
struct VLABoundData {
SourceLocation Loc;
const TypeDescriptor &Type;
};
/// \brief Handle a VLA with a non-positive bound.
RECOVERABLE(vla_bound_not_positive, VLABoundData *Data, ValueHandle Bound)
// Keeping this around for binary compatibility with (sanitized) programs
// compiled with older compilers.
struct FloatCastOverflowData {
const TypeDescriptor &FromType;
const TypeDescriptor &ToType;
};
struct FloatCastOverflowDataV2 {
SourceLocation Loc;
const TypeDescriptor &FromType;
const TypeDescriptor &ToType;
};
/// Handle overflow in a conversion to or from a floating-point type.
/// void *Data is one of FloatCastOverflowData* or FloatCastOverflowDataV2*
RECOVERABLE(float_cast_overflow, void *Data, ValueHandle From)
struct InvalidValueData {
SourceLocation Loc;
const TypeDescriptor &Type;
};
/// \brief Handle a load of an invalid value for the type.
RECOVERABLE(load_invalid_value, InvalidValueData *Data, ValueHandle Val)
/// Known implicit conversion check kinds.
/// Keep in sync with the enum of the same name in CGExprScalar.cpp
enum ImplicitConversionCheckKind : unsigned char {
ICCK_IntegerTruncation = 0, // Legacy, was only used by clang 7.
ICCK_UnsignedIntegerTruncation = 1,
ICCK_SignedIntegerTruncation = 2,
ICCK_IntegerSignChange = 3,
ICCK_SignedIntegerTruncationOrSignChange = 4,
};
struct ImplicitConversionData {
SourceLocation Loc;
const TypeDescriptor &FromType;
const TypeDescriptor &ToType;
/* ImplicitConversionCheckKind */ unsigned char Kind;
};
/// \brief Implict conversion that changed the value.
RECOVERABLE(implicit_conversion, ImplicitConversionData *Data, ValueHandle Src,
ValueHandle Dst)
/// Known builtin check kinds.
/// Keep in sync with the enum of the same name in CodeGenFunction.h
enum BuiltinCheckKind : unsigned char {
BCK_CTZPassedZero,
BCK_CLZPassedZero,
};
struct InvalidBuiltinData {
SourceLocation Loc;
unsigned char Kind;
};
/// Handle a builtin called in an invalid way.
RECOVERABLE(invalid_builtin, InvalidBuiltinData *Data)
struct InvalidObjCCast {
SourceLocation Loc;
const TypeDescriptor &ExpectedType;
};
/// Handle an invalid ObjC cast.
RECOVERABLE(invalid_objc_cast, InvalidObjCCast *Data, ValueHandle Pointer)
struct NonNullReturnData {
SourceLocation AttrLoc;
};
/// \brief Handle returning null from function with the returns_nonnull
/// attribute, or a return type annotated with _Nonnull.
RECOVERABLE(nonnull_return_v1, NonNullReturnData *Data, SourceLocation *Loc)
RECOVERABLE(nullability_return_v1, NonNullReturnData *Data, SourceLocation *Loc)
struct NonNullArgData {
SourceLocation Loc;
SourceLocation AttrLoc;
int ArgIndex;
};
/// \brief Handle passing null pointer to a function parameter with the nonnull
/// attribute, or a _Nonnull type annotation.
RECOVERABLE(nonnull_arg, NonNullArgData *Data)
RECOVERABLE(nullability_arg, NonNullArgData *Data)
struct PointerOverflowData {
SourceLocation Loc;
};
RECOVERABLE(pointer_overflow, PointerOverflowData *Data, ValueHandle Base,
ValueHandle Result)
/// \brief Known CFI check kinds.
/// Keep in sync with the enum of the same name in CodeGenFunction.h
enum CFITypeCheckKind : unsigned char {
CFITCK_VCall,
CFITCK_NVCall,
CFITCK_DerivedCast,
CFITCK_UnrelatedCast,
CFITCK_ICall,
CFITCK_NVMFCall,
CFITCK_VMFCall,
};
struct CFICheckFailData {
CFITypeCheckKind CheckKind;
SourceLocation Loc;
const TypeDescriptor &Type;
};
/// \brief Handle control flow integrity failures.
RECOVERABLE(cfi_check_fail, CFICheckFailData *Data, ValueHandle Function,
uptr VtableIsValid)
struct ReportOptions;
extern "C" SANITIZER_INTERFACE_ATTRIBUTE void __ubsan_handle_cfi_bad_type(
CFICheckFailData *Data, ValueHandle Vtable, bool ValidVtable,
ReportOptions Opts);
}
#endif // UBSAN_HANDLERS_H
|
