diff options
Diffstat (limited to 'runtime/Sanitizer')
| -rw-r--r-- | runtime/Sanitizer/CMakeLists.txt | 18 | ||||
| -rw-r--r-- | runtime/Sanitizer/sanitizer_common/sanitizer_common.h | 20 | ||||
| -rw-r--r-- | runtime/Sanitizer/sanitizer_common/sanitizer_internal_defs.h | 51 | ||||
| -rw-r--r-- | runtime/Sanitizer/sanitizer_common/sanitizer_platform.h | 21 | ||||
| -rw-r--r-- | runtime/Sanitizer/ubsan/ubsan_checks.inc | 97 | ||||
| -rw-r--r-- | runtime/Sanitizer/ubsan/ubsan_diag.h | 36 | ||||
| -rw-r--r-- | runtime/Sanitizer/ubsan/ubsan_handlers.cpp | 500 | ||||
| -rw-r--r-- | runtime/Sanitizer/ubsan/ubsan_handlers.h | 115 | ||||
| -rw-r--r-- | runtime/Sanitizer/ubsan/ubsan_value.h | 76 |
9 files changed, 934 insertions, 0 deletions
diff --git a/runtime/Sanitizer/CMakeLists.txt b/runtime/Sanitizer/CMakeLists.txt new file mode 100644 index 00000000..39031dfb --- /dev/null +++ b/runtime/Sanitizer/CMakeLists.txt @@ -0,0 +1,18 @@ +#===------------------------------------------------------------------------===# +# +# The KLEE Symbolic Virtual Machine +# +# This file is distributed under the University of Illinois Open Source +# License. See LICENSE.TXT for details. +# +#===------------------------------------------------------------------------===# +# Set up +set(LIB_PREFIX "UBSan") +set(SRC_FILES + ubsan/ubsan_handlers.cpp + ) + +# Build it +include("${CMAKE_SOURCE_DIR}/cmake/compile_bitcode_library.cmake") +prefix_with_path("${SRC_FILES}" "${CMAKE_CURRENT_SOURCE_DIR}/" prefixed_files) +add_bitcode_library_targets("${LIB_PREFIX}" "${prefixed_files}" "" "") \ No newline at end of file diff --git a/runtime/Sanitizer/sanitizer_common/sanitizer_common.h b/runtime/Sanitizer/sanitizer_common/sanitizer_common.h new file mode 100644 index 00000000..ebb88600 --- /dev/null +++ b/runtime/Sanitizer/sanitizer_common/sanitizer_common.h @@ -0,0 +1,20 @@ +//===-- sanitizer_common.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 +// +//===----------------------------------------------------------------------===// +// +// This file is shared between run-time libraries of sanitizers. +// +// It declares common functions and classes that are used in both runtimes. +// Implementation of some functions are provided in sanitizer_common, while +// others must be defined by run-time library itself. +//===----------------------------------------------------------------------===// +#ifndef SANITIZER_COMMON_H +#define SANITIZER_COMMON_H + +#include "sanitizer_internal_defs.h" + +#endif // SANITIZER_COMMON_H diff --git a/runtime/Sanitizer/sanitizer_common/sanitizer_internal_defs.h b/runtime/Sanitizer/sanitizer_common/sanitizer_internal_defs.h new file mode 100644 index 00000000..d0817abe --- /dev/null +++ b/runtime/Sanitizer/sanitizer_common/sanitizer_internal_defs.h @@ -0,0 +1,51 @@ +//===-- sanitizer_internal_defs.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 +// +//===----------------------------------------------------------------------===// +// +// This file is shared between AddressSanitizer and ThreadSanitizer. +// It contains macro used in run-time libraries code. +//===----------------------------------------------------------------------===// +#ifndef SANITIZER_DEFS_H +#define SANITIZER_DEFS_H + +#include "sanitizer_platform.h" + +// For portability reasons we do not include stddef.h, stdint.h or any other +// system header, but we do need some basic types that are not defined +// in a portable way by the language itself. +namespace __sanitizer { + +#if defined(_WIN64) +// 64-bit Windows uses LLP64 data model. +typedef unsigned long long uptr; +typedef signed long long sptr; +#else +#if (SANITIZER_WORDSIZE == 64) || defined(__APPLE__) || defined(_WIN32) +typedef unsigned long uptr; +typedef signed long sptr; +#else +typedef unsigned int uptr; +typedef signed int sptr; +#endif +#endif // defined(_WIN64) + +typedef unsigned char u8; +typedef unsigned short u16; +typedef unsigned int u32; +typedef unsigned long long u64; +typedef signed char s8; +typedef signed short s16; +typedef signed int s32; +typedef signed long long s64; + +} // namespace __sanitizer + +namespace __ubsan { +using namespace __sanitizer; +} + +#endif // SANITIZER_DEFS_H diff --git a/runtime/Sanitizer/sanitizer_common/sanitizer_platform.h b/runtime/Sanitizer/sanitizer_common/sanitizer_platform.h new file mode 100644 index 00000000..074d2b74 --- /dev/null +++ b/runtime/Sanitizer/sanitizer_common/sanitizer_platform.h @@ -0,0 +1,21 @@ +//===-- sanitizer_platform.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 +// +//===----------------------------------------------------------------------===// +// +// Common platform macros. +//===----------------------------------------------------------------------===// + +#ifndef SANITIZER_PLATFORM_H +#define SANITIZER_PLATFORM_H + +#if __LP64__ || defined(_WIN64) +#define SANITIZER_WORDSIZE 64 +#else +#define SANITIZER_WORDSIZE 32 +#endif + +#endif // SANITIZER_PLATFORM_H diff --git a/runtime/Sanitizer/ubsan/ubsan_checks.inc b/runtime/Sanitizer/ubsan/ubsan_checks.inc new file mode 100644 index 00000000..b426beea --- /dev/null +++ b/runtime/Sanitizer/ubsan/ubsan_checks.inc @@ -0,0 +1,97 @@ +//===-- ubsan_checks.inc ----------------------------------------*- 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 +// +//===----------------------------------------------------------------------===// +// +// List of checks handled by UBSan runtime. +// +//===----------------------------------------------------------------------===// + +#include "klee/Config/Version.h" + +#ifndef UBSAN_CHECK +# error "Define UBSAN_CHECK prior to including this file!" +#endif + +// UBSAN_CHECK(Name, SummaryKind, FSanitizeFlagName) +// SummaryKind and FSanitizeFlagName should be string literals. + +UBSAN_CHECK(GenericUB, "undefined-behavior", "undefined") +UBSAN_CHECK(NullPointerUse, "null-pointer-use", "null") +#if LLVM_VERSION_MAJOR >= 11 +UBSAN_CHECK(NullPointerUseWithNullability, "null-pointer-use", + "nullability-assign") +#endif +#if LLVM_VERSION_MAJOR >= 10 +UBSAN_CHECK(NullptrWithOffset, "nullptr-with-offset", "pointer-overflow") +UBSAN_CHECK(NullptrWithNonZeroOffset, "nullptr-with-nonzero-offset", + "pointer-overflow") +UBSAN_CHECK(NullptrAfterNonZeroOffset, "nullptr-after-nonzero-offset", + "pointer-overflow") +#endif +#if LLVM_VERSION_MAJOR >= 5 +UBSAN_CHECK(PointerOverflow, "pointer-overflow", "pointer-overflow") +#endif +UBSAN_CHECK(MisalignedPointerUse, "misaligned-pointer-use", "alignment") +#if LLVM_VERSION_MAJOR >= 8 +UBSAN_CHECK(AlignmentAssumption, "alignment-assumption", "alignment") +#endif +UBSAN_CHECK(InsufficientObjectSize, "insufficient-object-size", "object-size") +UBSAN_CHECK(SignedIntegerOverflow, "signed-integer-overflow", + "signed-integer-overflow") +UBSAN_CHECK(UnsignedIntegerOverflow, "unsigned-integer-overflow", + "unsigned-integer-overflow") +UBSAN_CHECK(IntegerDivideByZero, "integer-divide-by-zero", + "integer-divide-by-zero") +UBSAN_CHECK(FloatDivideByZero, "float-divide-by-zero", "float-divide-by-zero") +#if LLVM_VERSION_MAJOR >= 6 +UBSAN_CHECK(InvalidBuiltin, "invalid-builtin-use", "invalid-builtin-use") +#endif +#if LLVM_VERSION_MAJOR >= 11 +UBSAN_CHECK(InvalidObjCCast, "invalid-objc-cast", "invalid-objc-cast") +#endif +#if LLVM_VERSION_MAJOR >= 8 +UBSAN_CHECK(ImplicitUnsignedIntegerTruncation, + "implicit-unsigned-integer-truncation", + "implicit-unsigned-integer-truncation") +UBSAN_CHECK(ImplicitSignedIntegerTruncation, + "implicit-signed-integer-truncation", + "implicit-signed-integer-truncation") +#elif LLVM_VERSION_MAJOR >= 7 +UBSAN_CHECK(ImplicitIntegerTruncation, "implicit-integer-truncation", + "implicit-integer-truncation") +#endif +#if LLVM_VERSION_MAJOR >= 8 +UBSAN_CHECK(ImplicitIntegerSignChange, + "implicit-integer-sign-change", + "implicit-integer-sign-change") +UBSAN_CHECK(ImplicitSignedIntegerTruncationOrSignChange, + "implicit-signed-integer-truncation-or-sign-change", + "implicit-signed-integer-truncation,implicit-integer-sign-change") +#endif +UBSAN_CHECK(InvalidShiftBase, "invalid-shift-base", "shift-base") +UBSAN_CHECK(InvalidShiftExponent, "invalid-shift-exponent", "shift-exponent") +UBSAN_CHECK(OutOfBoundsIndex, "out-of-bounds-index", "bounds") +UBSAN_CHECK(UnreachableCall, "unreachable-call", "unreachable") +UBSAN_CHECK(MissingReturn, "missing-return", "return") +UBSAN_CHECK(NonPositiveVLAIndex, "non-positive-vla-index", "vla-bound") +UBSAN_CHECK(FloatCastOverflow, "float-cast-overflow", "float-cast-overflow") +UBSAN_CHECK(InvalidBoolLoad, "invalid-bool-load", "bool") +UBSAN_CHECK(InvalidEnumLoad, "invalid-enum-load", "enum") +UBSAN_CHECK(FunctionTypeMismatch, "function-type-mismatch", "function") +UBSAN_CHECK(InvalidNullReturn, "invalid-null-return", + "returns-nonnull-attribute") +#if LLVM_VERSION_MAJOR >= 11 +UBSAN_CHECK(InvalidNullReturnWithNullability, "invalid-null-return", + "nullability-return") +#endif +UBSAN_CHECK(InvalidNullArgument, "invalid-null-argument", "nonnull-attribute") +#if LLVM_VERSION_MAJOR >= 11 +UBSAN_CHECK(InvalidNullArgumentWithNullability, "invalid-null-argument", + "nullability-arg") +#endif +UBSAN_CHECK(DynamicTypeMismatch, "dynamic-type-mismatch", "vptr") +UBSAN_CHECK(CFIBadType, "cfi-bad-type", "cfi") diff --git a/runtime/Sanitizer/ubsan/ubsan_diag.h b/runtime/Sanitizer/ubsan/ubsan_diag.h new file mode 100644 index 00000000..71219ab7 --- /dev/null +++ b/runtime/Sanitizer/ubsan/ubsan_diag.h @@ -0,0 +1,36 @@ +//===-- ubsan_diag.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 +// +//===----------------------------------------------------------------------===// +// +// Diagnostics emission for Clang's undefined behavior sanitizer. +// +//===----------------------------------------------------------------------===// +#ifndef UBSAN_DIAG_H +#define UBSAN_DIAG_H + +#include "ubsan_value.h" + +namespace __ubsan { + +/// \brief A C++ type name. Really just a strong typedef for 'const char*'. +class TypeName { + const char *Name; + +public: + TypeName(const char *Name) : Name(Name) {} + const char *getName() const { return Name; } +}; + +enum /*class*/ ErrorType { +#define UBSAN_CHECK(Name, SummaryKind, FSanitizeFlagName) Name, +#include "ubsan_checks.inc" +#undef UBSAN_CHECK +}; + +} // namespace __ubsan + +#endif // UBSAN_DIAG_H diff --git a/runtime/Sanitizer/ubsan/ubsan_handlers.cpp b/runtime/Sanitizer/ubsan/ubsan_handlers.cpp new file mode 100644 index 00000000..3cc9af2a --- /dev/null +++ b/runtime/Sanitizer/ubsan/ubsan_handlers.cpp @@ -0,0 +1,500 @@ +//===-- ubsan_handlers.cpp ------------------------------------------------===// +// +// 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 +// +//===----------------------------------------------------------------------===// +// +// Error logging entry points for the UBSan runtime. +// +//===----------------------------------------------------------------------===// + +#include "ubsan_handlers.h" +#include "ubsan_diag.h" + +extern "C" __attribute__((noreturn)) void klee_report_error(const char *file, + int line, + const char *message, + const char *suffix); + +namespace __ubsan { +static const char *ConvertTypeToString(ErrorType Type) { + switch (Type) { +#define UBSAN_CHECK(Name, SummaryKind, FSanitizeFlagName) \ + case ErrorType::Name: \ + return SummaryKind; +#include "ubsan_checks.inc" +#undef UBSAN_CHECK + } + // UNREACHABLE("unknown ErrorType!"); +} + +__attribute__((noreturn)) static void +report_error(const char *msg, const char *suffix = "undefined_behavior.err") { + klee_report_error(__FILE__, __LINE__, msg, suffix); +} + +__attribute__((noreturn)) static void report_error_type(ErrorType ET) { + report_error(ConvertTypeToString(ET)); +} + +/// Situations in which we might emit a check for the suitability of a +/// pointer or glvalue. Needs to be kept in sync with CodeGenFunction.h in +/// clang. +enum TypeCheckKind { + /// Checking the operand of a load. Must be suitably sized and aligned. + TCK_Load, + /// Checking the destination of a store. Must be suitably sized and aligned. + TCK_Store, + /// Checking the bound value in a reference binding. Must be suitably sized + /// and aligned, but is not required to refer to an object (until the + /// reference is used), per core issue 453. + TCK_ReferenceBinding, + /// Checking the object expression in a non-static data member access. Must + /// be an object within its lifetime. + TCK_MemberAccess, + /// Checking the 'this' pointer for a call to a non-static member function. + /// Must be an object within its lifetime. + TCK_MemberCall, + /// Checking the 'this' pointer for a constructor call. + TCK_ConstructorCall, + /// Checking the operand of a static_cast to a derived pointer type. Must be + /// null or an object within its lifetime. + TCK_DowncastPointer, + /// Checking the operand of a static_cast to a derived reference type. Must + /// be an object within its lifetime. + TCK_DowncastReference, + /// Checking the operand of a cast to a base object. Must be suitably sized + /// and aligned. + TCK_Upcast, + /// Checking the operand of a cast to a virtual base object. Must be an + /// object within its lifetime. + TCK_UpcastToVirtualBase, + /// Checking the value assigned to a _Nonnull pointer. Must not be null. + TCK_NonnullAssign, + /// Checking the operand of a dynamic_cast or a typeid expression. Must be + /// null or an object within its lifetime. + TCK_DynamicOperation +}; + +static void handleTypeMismatchImpl(TypeMismatchData *Data, + ValueHandle Pointer) { +#if LLVM_VERSION_MAJOR >= 4 + uptr Alignment = (uptr)1 << Data->LogAlignment; +#endif + ErrorType ET; + if (!Pointer) +#if LLVM_VERSION_MAJOR >= 11 + ET = (Data->TypeCheckKind == TCK_NonnullAssign) + ? ErrorType::NullPointerUseWithNullability + : ErrorType::NullPointerUse; +#else + ET = ErrorType::NullPointerUse; +#endif +#if LLVM_VERSION_MAJOR >= 4 + else if (Pointer & (Alignment - 1)) +#else + else if (Data->Alignment && (Pointer & (Data->Alignment - 1))) +#endif + ET = ErrorType::MisalignedPointerUse; + else + ET = ErrorType::InsufficientObjectSize; + + report_error_type(ET); +} + +#if LLVM_VERSION_MAJOR >= 4 +extern "C" void __ubsan_handle_type_mismatch_v1(TypeMismatchData *Data, + ValueHandle Pointer) { + + handleTypeMismatchImpl(Data, Pointer); +} + +extern "C" void __ubsan_handle_type_mismatch_v1_abort(TypeMismatchData *Data, + ValueHandle Pointer) { + + handleTypeMismatchImpl(Data, Pointer); +} +#else +extern "C" void __ubsan_handle_type_mismatch(TypeMismatchData *Data, + ValueHandle Pointer) { + handleTypeMismatchImpl(Data, Pointer); +} + +extern "C" void __ubsan_handle_type_mismatch_abort(TypeMismatchData *Data, + ValueHandle Pointer) { + handleTypeMismatchImpl(Data, Pointer); +} +#endif + +#if LLVM_VERSION_MAJOR >= 8 +static void handleAlignmentAssumptionImpl(AlignmentAssumptionData * /*Data*/, + ValueHandle /*Pointer*/, + ValueHandle /*Alignment*/, + ValueHandle /*Offset*/) { + ErrorType ET = ErrorType::AlignmentAssumption; + report_error_type(ET); +} + +extern "C" void +__ubsan_handle_alignment_assumption(AlignmentAssumptionData *Data, + ValueHandle Pointer, ValueHandle Alignment, + ValueHandle Offset) { + handleAlignmentAssumptionImpl(Data, Pointer, Alignment, Offset); +} + +extern "C" void __ubsan_handle_alignment_assumption_abort( + AlignmentAssumptionData *Data, ValueHandle Pointer, ValueHandle Alignment, + ValueHandle Offset) { + handleAlignmentAssumptionImpl(Data, Pointer, Alignment, Offset); +} +#endif + +/// \brief Common diagnostic emission for various forms of integer overflow. +static void handleIntegerOverflowImpl(OverflowData *Data, ValueHandle /*LHS*/, + const char * /*Operator*/) { + bool IsSigned = Data->Type.isSignedIntegerTy(); + ErrorType ET = IsSigned ? ErrorType::SignedIntegerOverflow + : ErrorType::UnsignedIntegerOverflow; + report_error_type(ET); +} + +#define UBSAN_OVERFLOW_HANDLER(handler_name, op, unrecoverable) \ + extern "C" void handler_name(OverflowData *Data, ValueHandle LHS, \ + ValueHandle RHS) { \ + handleIntegerOverflowImpl(Data, LHS, op); \ + } + +UBSAN_OVERFLOW_HANDLER(__ubsan_handle_add_overflow, "+", false) +UBSAN_OVERFLOW_HANDLER(__ubsan_handle_add_overflow_abort, "+", true) +UBSAN_OVERFLOW_HANDLER(__ubsan_handle_sub_overflow, "-", false) +UBSAN_OVERFLOW_HANDLER(__ubsan_handle_sub_overflow_abort, "-", true) +UBSAN_OVERFLOW_HANDLER(__ubsan_handle_mul_overflow, "*", false) +UBSAN_OVERFLOW_HANDLER(__ubsan_handle_mul_overflow_abort, "*", true) + +static void handleNegateOverflowImpl(OverflowData *Data, + ValueHandle /*OldVal*/) { + bool IsSigned = Data->Type.isSignedIntegerTy(); + ErrorType ET = IsSigned ? ErrorType::SignedIntegerOverflow + : ErrorType::UnsignedIntegerOverflow; + report_error_type(ET); +} + +extern "C" void __ubsan_handle_negate_overflow(OverflowData *Data, + ValueHandle OldVal) { + handleNegateOverflowImpl(Data, OldVal); +} + +extern "C" void __ubsan_handle_negate_overflow_abort(OverflowData *Data, + ValueHandle OldVal) { + handleNegateOverflowImpl(Data, OldVal); +} + +static void handleDivremOverflowImpl(OverflowData *Data, ValueHandle /*LHS*/, + ValueHandle /*RHS*/) { + ErrorType ET; + if (Data->Type.isIntegerTy()) + report_error("integer division overflow"); + else + ET = ErrorType::FloatDivideByZero; + report_error_type(ET); +} + +extern "C" void __ubsan_handle_divrem_overflow(OverflowData *Data, + ValueHandle LHS, + ValueHandle RHS) { + handleDivremOverflowImpl(Data, LHS, RHS); +} + +extern "C" void __ubsan_handle_divrem_overflow_abort(OverflowData *Data, + ValueHandle LHS, + ValueHandle RHS) { + handleDivremOverflowImpl(Data, LHS, RHS); +} + +static void handleShiftOutOfBoundsImpl(ShiftOutOfBoundsData * /*Data*/, + ValueHandle /*LHS*/, + ValueHandle /*RHS*/) { + report_error("shift out of bounds"); +} + +extern "C" void __ubsan_handle_shift_out_of_bounds(ShiftOutOfBoundsData *Data, + ValueHandle LHS, + ValueHandle RHS) { + handleShiftOutOfBoundsImpl(Data, LHS, RHS); +} + +extern "C" void +__ubsan_handle_shift_out_of_bounds_abort(ShiftOutOfBoundsData *Data, + ValueHandle LHS, ValueHandle RHS) { + handleShiftOutOfBoundsImpl(Data, LHS, RHS); +} + +static void handleOutOfBoundsImpl(OutOfBoundsData * /*Data*/, + ValueHandle /*Index*/) { + ErrorType ET = ErrorType::OutOfBoundsIndex; + report_error_type(ET); +} + +extern "C" void __ubsan_handle_out_of_bounds(OutOfBoundsData *Data, + ValueHandle Index) { + handleOutOfBoundsImpl(Data, Index); +} + +extern "C" void __ubsan_handle_out_of_bounds_abort(OutOfBoundsData *Data, + ValueHandle Index) { + handleOutOfBoundsImpl(Data, Index); +} + +static void handleBuiltinUnreachableImpl(UnreachableData * /*Data*/) { + ErrorType ET = ErrorType::UnreachableCall; + report_error_type(ET); +} + +extern "C" void __ubsan_handle_builtin_unreachable(UnreachableData *Data) { + handleBuiltinUnreachableImpl(Data); +} + +static void handleMissingReturnImpl(UnreachableData * /*Data*/) { + ErrorType ET = ErrorType::MissingReturn; + report_error_type(ET); +} + +extern "C" void __ubsan_handle_missing_return(UnreachableData *Data) { + handleMissingReturnImpl(Data); +} + +static void handleVLABoundNotPositive(VLABoundData * /*Data*/, + ValueHandle /*Bound*/) { + ErrorType ET = ErrorType::NonPositiveVLAIndex; + report_error_type(ET); +} + +extern "C" void __ubsan_handle_vla_bound_not_positive(VLABoundData *Data, + ValueHandle Bound) { + handleVLABoundNotPositive(Data, Bound); +} + +extern "C" void __ubsan_handle_vla_bound_not_positive_abort(VLABoundData *Data, + ValueHandle Bound) { + handleVLABoundNotPositive(Data, Bound); +} + +static void handleFloatCastOverflow(void * /*DataPtr*/, ValueHandle /*From*/) { + ErrorType ET = ErrorType::FloatCastOverflow; + report_error_type(ET); +} + +extern "C" void __ubsan_handle_float_cast_overflow(void *Data, + ValueHandle From) { + handleFloatCastOverflow(Data, From); +} + +extern "C" void __ubsan_handle_float_cast_overflow_abort(void *Data, + ValueHandle From) { + handleFloatCastOverflow(Data, From); +} + +static void handleLoadInvalidValue(InvalidValueData * /*Data*/, + ValueHandle /*Val*/) { + report_error("load invalid value"); +} + +extern "C" void __ubsan_handle_load_invalid_value(InvalidValueData *Data, + ValueHandle Val) { + handleLoadInvalidValue(Data, Val); +} +extern "C" void __ubsan_handle_load_invalid_value_abort(InvalidValueData *Data, + ValueHandle Val) { + handleLoadInvalidValue(Data, Val); +} + +#if LLVM_VERSION_MAJOR >= 7 +static void handleImplicitConversion(ImplicitConversionData *Data, + ValueHandle /*Src*/, ValueHandle /*Dst*/) { + ErrorType ET = ErrorType::GenericUB; + +#if LLVM_VERSION_MAJOR >= 8 + const TypeDescriptor &SrcTy = Data->FromType; + const TypeDescriptor &DstTy = Data->ToType; + + bool SrcSigned = SrcTy.isSignedIntegerTy(); + bool DstSigned = DstTy.isSignedIntegerTy(); + + switch (Data->Kind) { + case ICCK_IntegerTruncation: { // Legacy, no longer used. + // Let's figure out what it should be as per the new types, and upgrade. + // If both types are unsigned, then it's an unsigned truncation. + // Else, it is a signed truncation. + if (!SrcSigned && !DstSigned) { + ET = ErrorType::ImplicitUnsignedIntegerTruncation; + } else { + ET = ErrorType::ImplicitSignedIntegerTruncation; + } + break; + } + case ICCK_UnsignedIntegerTruncation: + ET = ErrorType::ImplicitUnsignedIntegerTruncation; + break; + case ICCK_SignedIntegerTruncation: + ET = ErrorType::ImplicitSignedIntegerTruncation; + break; + case ICCK_IntegerSignChange: + ET = ErrorType::ImplicitIntegerSignChange; + break; + case ICCK_SignedIntegerTruncationOrSignChange: + ET = ErrorType::ImplicitSignedIntegerTruncationOrSignChange; + break; + } +#else + switch (Data->Kind) { + case ICCK_IntegerTruncation: + ET = ErrorType::ImplicitIntegerTruncation; + break; + } +#endif + report_error_type(ET); +} + +extern "C" void __ubsan_handle_implicit_conversion(ImplicitConversionData *Data, + ValueHandle Src, + ValueHandle Dst) { + handleImplicitConversion(Data, Src, Dst); +} + +extern "C" void +__ubsan_handle_implicit_conversion_abort(ImplicitConversionData *Data, + ValueHandle Src, ValueHandle Dst) { + handleImplicitConversion(Data, Src, Dst); +} +#endif + +#if LLVM_VERSION_MAJOR >= 6 +static void handleInvalidBuiltin(InvalidBuiltinData * /*Data*/) { + ErrorType ET = ErrorType::InvalidBuiltin; + report_error_type(ET); +} + +extern "C" void __ubsan_handle_invalid_builtin(InvalidBuiltinData *Data) { + handleInvalidBuiltin(Data); +} + +extern "C" void __ubsan_handle_invalid_builtin_abort(InvalidBuiltinData *Data) { + handleInvalidBuiltin(Data); +} +#endif + +#if LLVM_VERSION_MAJOR >= 5 +static void handleNonNullReturn(NonNullReturnData * /*Data*/, + SourceLocation * /*LocPtr*/, bool IsAttr) { +#if LLVM_VERSION_MAJOR >= 11 + ErrorType ET = IsAttr ? ErrorType::InvalidNullReturn + : ErrorType::InvalidNullReturnWithNullability; +#else + ErrorType ET = ErrorType::InvalidNullReturn; +#endif + report_error_type(ET); +} + +extern "C" void __ubsan_handle_nonnull_return_v1(NonNullReturnData *Data, + SourceLocation *LocPtr) { + handleNonNullReturn(Data, LocPtr, true); +} + +extern "C" void __ubsan_handle_nonnull_return_v1_abort(NonNullReturnData *Data, + SourceLocation *LocPtr) { + handleNonNullReturn(Data, LocPtr, true); +} +#else +static void handleNonNullReturn(NonNullReturnData * /*Data*/) { + ErrorType ET = ErrorType::InvalidNullReturn; + report_error_type(ET); +} + +extern "C" void __ubsan_handle_nonnull_return(NonNullReturnData *Data) { + handleNonNullReturn(Data); +} + +extern "C" void __ubsan_handle_nonnull_return_abort(NonNullReturnData *Data) { + handleNonNullReturn(Data); +} +#endif + +#if LLVM_VERSION_MAJOR >= 5 +extern "C" void __ubsan_handle_nullability_return_v1(NonNullReturnData *Data, + SourceLocation *LocPtr) { + handleNonNullReturn(Data, LocPtr, false); +} + +extern "C" void +__ubsan_handle_nullability_return_v1_abort(NonNullReturnData *Data, + SourceLocation *LocPtr) { + handleNonNullReturn(Data, LocPtr, false); +} +#endif + +static void handleNonNullArg(NonNullArgData * /*Data*/, bool IsAttr) { +#if LLVM_VERSION_MAJOR >= 11 + ErrorType ET = IsAttr ? ErrorType::InvalidNullArgument + : ErrorType::InvalidNullArgumentWithNullability; +#else + ErrorType ET = ErrorType::InvalidNullArgument; +#endif + report_error_type(ET); +} + +extern "C" void __ubsan_handle_nonnull_arg(NonNullArgData *Data) { + handleNonNullArg(Data, true); +} + +extern "C" void __ubsan_handle_nonnull_arg_abort(NonNullArgData *Data) { + handleNonNullArg(Data, true); +} + +#if LLVM_VERSION_MAJOR >= 5 +extern "C" void __ubsan_handle_nullability_arg(NonNullArgData *Data) { + handleNonNullArg(Data, false); +} + +extern "C" void __ubsan_handle_nullability_arg_abort(NonNullArgData *Data) { + + handleNonNullArg(Data, false); +} +#endif + +#if LLVM_VERSION_MAJOR >= 5 +static void handlePointerOverflowImpl(PointerOverflowData * /*Data*/, + ValueHandle Base, ValueHandle Result) { +#if LLVM_VERSION_MAJOR >= 10 + ErrorType ET; + if (Base == 0 && Result == 0) + ET = ErrorType::NullptrWithOffset; + else if (Base == 0 && Result != 0) + ET = ErrorType::NullptrWithNonZeroOffset; + else if (Base != 0 && Result == 0) + ET = ErrorType::NullptrAfterNonZeroOffset; + else + ET = ErrorType::PointerOverflow; +#else + ErrorType ET = ErrorType::PointerOverflow; +#endif + report_error_type(ET); +} + +extern "C" void __ubsan_handle_pointer_overflow(PointerOverflowData *Data, + ValueHandle Base, + ValueHandle Result) { + + handlePointerOverflowImpl(Data, Base, Result); +} + +extern "C" void __ubsan_handle_pointer_overflow_abort(PointerOverflowData *Data, + ValueHandle Base, + ValueHandle Result) { + + handlePointerOverflowImpl(Data, Base, Result); +} +#endif + +} // namespace __ubsan \ No newline at end of file diff --git a/runtime/Sanitizer/ubsan/ubsan_handlers.h b/runtime/Sanitizer/ubsan/ubsan_handlers.h new file mode 100644 index 00000000..be2b8225 --- /dev/null +++ b/runtime/Sanitizer/ubsan/ubsan_handlers.h @@ -0,0 +1,115 @@ +//===-- 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" + +#include "klee/Config/Version.h" + +using namespace __ubsan; + +struct TypeMismatchData { + SourceLocation Loc; + const TypeDescriptor &Type; +#if LLVM_VERSION_MAJOR >= 4 + unsigned char LogAlignment; +#else + uptr Alignment; +#endif + unsigned char TypeCheckKind; +}; + +#if LLVM_VERSION_MAJOR >= 8 +struct AlignmentAssumptionData { + SourceLocation Loc; + SourceLocation AssumptionLoc; + const TypeDescriptor &Type; +}; +#endif + +struct OverflowData { + SourceLocation Loc; + const TypeDescriptor &Type; +}; + +struct ShiftOutOfBoundsData { + SourceLocation Loc; + const TypeDescriptor &LHSType; + const TypeDescriptor &RHSType; +}; + +struct OutOfBoundsData { + SourceLocation Loc; + const TypeDescriptor &ArrayType; + const TypeDescriptor &IndexType; +}; + +struct UnreachableData { + SourceLocation Loc; +}; + +struct VLABoundData { + SourceLocation Loc; + const TypeDescriptor &Type; +}; + +struct InvalidValueData { + SourceLocation Loc; + const TypeDescriptor &Type; +}; + +#if LLVM_VERSION_MAJOR >= 7 +/// 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, +}; +#endif + +#if LLVM_VERSION_MAJOR >= 7 +struct ImplicitConversionData { + SourceLocation Loc; + const TypeDescriptor &FromType; + const TypeDescriptor &ToType; + /* ImplicitConversionCheckKind */ unsigned char Kind; +}; +#endif + +#if LLVM_VERSION_MAJOR >= 6 +struct InvalidBuiltinData { + SourceLocation Loc; + unsigned char Kind; +}; +#endif + +struct NonNullReturnData { + SourceLocation AttrLoc; +}; + +struct NonNullArgData { + SourceLocation Loc; + SourceLocation AttrLoc; + int ArgIndex; +}; + +#if LLVM_VERSION_MAJOR >= 5 +struct PointerOverflowData { + SourceLocation Loc; +}; +#endif + +#endif // UBSAN_HANDLERS_H \ No newline at end of file diff --git a/runtime/Sanitizer/ubsan/ubsan_value.h b/runtime/Sanitizer/ubsan/ubsan_value.h new file mode 100644 index 00000000..5474961e --- /dev/null +++ b/runtime/Sanitizer/ubsan/ubsan_value.h @@ -0,0 +1,76 @@ +//===-- ubsan_value.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 +// +//===----------------------------------------------------------------------===// +// +// Representation of data which is passed from the compiler-generated calls into +// the ubsan runtime. +// +//===----------------------------------------------------------------------===// +#ifndef UBSAN_VALUE_H +#define UBSAN_VALUE_H + +#include "../sanitizer_common/sanitizer_common.h" + +namespace __ubsan { + +/// \brief A description of a source location. This corresponds to Clang's +/// \c PresumedLoc type. +class SourceLocation { + __attribute__((unused)) const char *Filename; + __attribute__((unused)) u32 Line; + __attribute__((unused)) u32 Column; + +public: + SourceLocation() : Filename(), Line(), Column() {} + SourceLocation(const char *Filename, unsigned Line, unsigned Column) + : Filename(Filename), Line(Line), Column(Column) {} +}; + +/// \brief A description of a type. +class TypeDescriptor { + /// A value from the \c Kind enumeration, specifying what flavor of type we + /// have. + u16 TypeKind; + + /// A \c Type-specific value providing information which allows us to + /// interpret the meaning of a ValueHandle of this type. + u16 TypeInfo; + + /// The name of the type follows, in a format suitable for including in + /// diagnostics. + char TypeName[1]; + +public: + enum Kind { + /// An integer type. Lowest bit is 1 for a signed value, 0 for an unsigned + /// value. Remaining bits are log_2(bit width). The value representation is + /// the integer itself if it fits into a ValueHandle, and a pointer to the + /// integer otherwise. + TK_Integer = 0x0000, + /// A floating-point type. Low 16 bits are bit width. The value + /// representation is that of bitcasting the floating-point value to an + /// integer type. + TK_Float = 0x0001, + /// Any other type. The value representation is unspecified. + TK_Unknown = 0xffff + }; + + const char *getTypeName() const { return TypeName; } + + Kind getKind() const { return static_cast<Kind>(TypeKind); } + + bool isIntegerTy() const { return getKind() == TK_Integer; } + bool isSignedIntegerTy() const { return isIntegerTy() && (TypeInfo & 1); } + bool isUnsignedIntegerTy() const { return isIntegerTy() && !(TypeInfo & 1); } +}; + +/// \brief An opaque handle to a value. +typedef uptr ValueHandle; + +} // namespace __ubsan + +#endif // UBSAN_VALUE_H |