* code 52: ``writeonly``
* code 53: ``speculatable``
* code 54: ``strictfp``
+* code 55: ``sanitize_hwaddress``
.. note::
The ``allocsize`` attribute has a special encoding for its arguments. Its two
``sanitize_thread``
This attribute indicates that ThreadSanitizer checks
(dynamic thread safety analysis) are enabled for this function.
+``sanitize_hwaddress``
+ This attribute indicates that HWAddressSanitizer checks
+ (dynamic address safety analysis based on tagged pointers) are enabled for
+ this function.
``speculatable``
This function attribute indicates that the function does not have any
effects besides calculating its result and does not have undefined behavior.
ATTR_KIND_WRITEONLY = 52,
ATTR_KIND_SPECULATABLE = 53,
ATTR_KIND_STRICT_FP = 54,
+ ATTR_KIND_SANITIZE_HWADDRESS = 55,
};
enum ComdatSelectionKindCodes {
/// MemorySanitizer is on.
def SanitizeMemory : EnumAttr<"sanitize_memory">;
+/// HWAddressSanitizer is on.
+def SanitizeHWAddress : EnumAttr<"sanitize_hwaddress">;
+
/// Argument is swift error.
def SwiftError : EnumAttr<"swifterror">;
def : CompatRule<"isEqual<SanitizeAddressAttr>">;
def : CompatRule<"isEqual<SanitizeThreadAttr>">;
def : CompatRule<"isEqual<SanitizeMemoryAttr>">;
+def : CompatRule<"isEqual<SanitizeHWAddressAttr>">;
def : CompatRule<"isEqual<SafeStackAttr>">;
class MergeRule<string F> {
void initializeStripNonLineTableDebugInfoPass(PassRegistry&);
void initializeStripSymbolsPass(PassRegistry&);
void initializeStructurizeCFGPass(PassRegistry&);
+void initializeHWAddressSanitizerPass(PassRegistry&);
void initializeTailCallElimPass(PassRegistry&);
void initializeTailDuplicatePassPass(PassRegistry&);
void initializeTargetLibraryInfoWrapperPassPass(PassRegistry&);
FunctionPass *createMemorySanitizerPass(int TrackOrigins = 0,
bool Recover = false);
+FunctionPass *createHWAddressSanitizerPass();
+
// Insert ThreadSanitizer (race detection) instrumentation
FunctionPass *createThreadSanitizerPass();
return 0;
if (LIOffs + NewLoadByteSize > MemLocEnd &&
- LI->getParent()->getParent()->hasFnAttribute(
- Attribute::SanitizeAddress))
+ (LI->getParent()->getParent()->hasFnAttribute(
+ Attribute::SanitizeAddress) ||
+ LI->getParent()->getParent()->hasFnAttribute(
+ Attribute::SanitizeHWAddress)))
// We will be reading past the location accessed by the original program.
// While this is safe in a regular build, Address Safety analysis tools
// may start reporting false warnings. So, don't do widening.
// Speculative load may create a race that did not exist in the source.
LI->getFunction()->hasFnAttribute(Attribute::SanitizeThread) ||
// Speculative load may load data from dirty regions.
- LI->getFunction()->hasFnAttribute(Attribute::SanitizeAddress))
+ LI->getFunction()->hasFnAttribute(Attribute::SanitizeAddress) ||
+ LI->getFunction()->hasFnAttribute(Attribute::SanitizeHWAddress))
return false;
const DataLayout &DL = LI->getModule()->getDataLayout();
return isDereferenceableAndAlignedPointer(LI->getPointerOperand(),
KEYWORD(strictfp);
KEYWORD(safestack);
KEYWORD(sanitize_address);
+ KEYWORD(sanitize_hwaddress);
KEYWORD(sanitize_thread);
KEYWORD(sanitize_memory);
KEYWORD(swifterror);
case lltok::kw_safestack: B.addAttribute(Attribute::SafeStack); break;
case lltok::kw_sanitize_address:
B.addAttribute(Attribute::SanitizeAddress); break;
+ case lltok::kw_sanitize_hwaddress:
+ B.addAttribute(Attribute::SanitizeHWAddress); break;
case lltok::kw_sanitize_thread:
B.addAttribute(Attribute::SanitizeThread); break;
case lltok::kw_sanitize_memory:
case lltok::kw_optsize:
case lltok::kw_returns_twice:
case lltok::kw_sanitize_address:
+ case lltok::kw_sanitize_hwaddress:
case lltok::kw_sanitize_memory:
case lltok::kw_sanitize_thread:
case lltok::kw_ssp:
case lltok::kw_optsize:
case lltok::kw_returns_twice:
case lltok::kw_sanitize_address:
+ case lltok::kw_sanitize_hwaddress:
case lltok::kw_sanitize_memory:
case lltok::kw_sanitize_thread:
case lltok::kw_ssp:
kw_alwaysinline,
kw_argmemonly,
kw_sanitize_address,
+ kw_sanitize_hwaddress,
kw_builtin,
kw_byval,
kw_inalloca,
case Attribute::WriteOnly: return 1ULL << 53;
case Attribute::Speculatable: return 1ULL << 54;
case Attribute::StrictFP: return 1ULL << 55;
+ case Attribute::SanitizeHWAddress: return 1ULL << 56;
case Attribute::Dereferenceable:
llvm_unreachable("dereferenceable attribute not supported in raw format");
break;
return Attribute::StructRet;
case bitc::ATTR_KIND_SANITIZE_ADDRESS:
return Attribute::SanitizeAddress;
+ case bitc::ATTR_KIND_SANITIZE_HWADDRESS:
+ return Attribute::SanitizeHWAddress;
case bitc::ATTR_KIND_SANITIZE_THREAD:
return Attribute::SanitizeThread;
case bitc::ATTR_KIND_SANITIZE_MEMORY:
return bitc::ATTR_KIND_STRUCT_RET;
case Attribute::SanitizeAddress:
return bitc::ATTR_KIND_SANITIZE_ADDRESS;
+ case Attribute::SanitizeHWAddress:
+ return bitc::ATTR_KIND_SANITIZE_HWADDRESS;
case Attribute::SanitizeThread:
return bitc::ATTR_KIND_SANITIZE_THREAD;
case Attribute::SanitizeMemory:
switch (EnableShrinkWrapOpt) {
case cl::BOU_UNSET:
return TFI->enableShrinkWrapping(MF) &&
- // Windows with CFI has some limitations that make it impossible
- // to use shrink-wrapping.
- !MF.getTarget().getMCAsmInfo()->usesWindowsCFI() &&
- // Sanitizers look at the value of the stack at the location
- // of the crash. Since a crash can happen anywhere, the
- // frame must be lowered before anything else happen for the
- // sanitizers to be able to get a correct stack frame.
- !(MF.getFunction()->hasFnAttribute(Attribute::SanitizeAddress) ||
- MF.getFunction()->hasFnAttribute(Attribute::SanitizeThread) ||
- MF.getFunction()->hasFnAttribute(Attribute::SanitizeMemory));
+ // Windows with CFI has some limitations that make it impossible
+ // to use shrink-wrapping.
+ !MF.getTarget().getMCAsmInfo()->usesWindowsCFI() &&
+ // Sanitizers look at the value of the stack at the location
+ // of the crash. Since a crash can happen anywhere, the
+ // frame must be lowered before anything else happen for the
+ // sanitizers to be able to get a correct stack frame.
+ !(MF.getFunction()->hasFnAttribute(Attribute::SanitizeAddress) ||
+ MF.getFunction()->hasFnAttribute(Attribute::SanitizeThread) ||
+ MF.getFunction()->hasFnAttribute(Attribute::SanitizeMemory) ||
+ MF.getFunction()->hasFnAttribute(Attribute::SanitizeHWAddress));
// If EnableShrinkWrap is set, it takes precedence on whatever the
// target sets. The rational is that we assume we want to test
// something related to shrink-wrapping.
if (hasAttribute(Attribute::SanitizeAddress))
return "sanitize_address";
+ if (hasAttribute(Attribute::SanitizeHWAddress))
+ return "sanitize_hwaddress";
if (hasAttribute(Attribute::AlwaysInline))
return "alwaysinline";
if (hasAttribute(Attribute::ArgMemOnly))
case Attribute::NonLazyBind:
case Attribute::ReturnsTwice:
case Attribute::SanitizeAddress:
+ case Attribute::SanitizeHWAddress:
case Attribute::SanitizeThread:
case Attribute::SanitizeMemory:
case Attribute::MinSize:
.Case("returns_twice", Attribute::ReturnsTwice)
.Case("safestack", Attribute::SafeStack)
.Case("sanitize_address", Attribute::SanitizeAddress)
+ .Case("sanitize_hwaddress", Attribute::SanitizeHWAddress)
.Case("sanitize_memory", Attribute::SanitizeMemory)
.Case("sanitize_thread", Attribute::SanitizeThread)
.Case("ssp", Attribute::StackProtect)
case Intrinsic::lifetime_start:
// Asan needs to poison memory to detect invalid access which is possible
// even for empty lifetime range.
- if (II->getFunction()->hasFnAttribute(Attribute::SanitizeAddress))
+ if (II->getFunction()->hasFnAttribute(Attribute::SanitizeAddress) ||
+ II->getFunction()->hasFnAttribute(Attribute::SanitizeHWAddress))
break;
if (removeTriviallyEmptyRange(*II, Intrinsic::lifetime_start,
SanitizerCoverage.cpp
ThreadSanitizer.cpp
EfficiencySanitizer.cpp
+ HWAddressSanitizer.cpp
ADDITIONAL_HEADER_DIRS
${LLVM_MAIN_INCLUDE_DIR}/llvm/Transforms
--- /dev/null
+//===- HWAddressSanitizer.cpp - detector of uninitialized reads -------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+/// This file is a part of HWAddressSanitizer, an address sanity checker
+/// based on tagged addressing.
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/IR/Attributes.h"
+#include "llvm/IR/BasicBlock.h"
+#include "llvm/IR/Constant.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/InlineAsm.h"
+#include "llvm/IR/InstVisitor.h"
+#include "llvm/IR/Instruction.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/Intrinsics.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Type.h"
+#include "llvm/IR/Value.h"
+#include "llvm/Pass.h"
+#include "llvm/Support/Casting.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Transforms/Instrumentation.h"
+#include "llvm/Transforms/Utils/ModuleUtils.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "hwasan"
+
+static const char *const kHwasanModuleCtorName = "hwasan.module_ctor";
+static const char *const kHwasanInitName = "__hwasan_init";
+
+// Accesses sizes are powers of two: 1, 2, 4, 8, 16.
+static const size_t kNumberOfAccessSizes = 5;
+
+static cl::opt<std::string> ClMemoryAccessCallbackPrefix(
+ "hwasan-memory-access-callback-prefix",
+ cl::desc("Prefix for memory access callbacks"), cl::Hidden,
+ cl::init("__hwasan_"));
+
+static cl::opt<bool> ClInstrumentReads("hwasan-instrument-reads",
+ cl::desc("instrument read instructions"),
+ cl::Hidden, cl::init(true));
+
+static cl::opt<bool> ClInstrumentWrites(
+ "hwasan-instrument-writes", cl::desc("instrument write instructions"),
+ cl::Hidden, cl::init(true));
+
+static cl::opt<bool> ClInstrumentAtomics(
+ "hwasan-instrument-atomics",
+ cl::desc("instrument atomic instructions (rmw, cmpxchg)"), cl::Hidden,
+ cl::init(true));
+
+namespace {
+
+/// \brief An instrumentation pass implementing detection of addressability bugs
+/// using tagged pointers.
+class HWAddressSanitizer : public FunctionPass {
+public:
+ // Pass identification, replacement for typeid.
+ static char ID;
+
+ HWAddressSanitizer() : FunctionPass(ID) {}
+
+ StringRef getPassName() const override { return "HWAddressSanitizer"; }
+
+ bool runOnFunction(Function &F) override;
+ bool doInitialization(Module &M) override;
+
+ void initializeCallbacks(Module &M);
+ bool instrumentMemAccess(Instruction *I);
+ Value *isInterestingMemoryAccess(Instruction *I, bool *IsWrite,
+ uint64_t *TypeSize, unsigned *Alignment,
+ Value **MaybeMask);
+
+private:
+ LLVMContext *C;
+ Type *IntptrTy;
+
+ Function *HwasanCtorFunction;
+
+ Function *HwasanMemoryAccessCallback[2][kNumberOfAccessSizes];
+ Function *HwasanMemoryAccessCallbackSized[2];
+};
+
+} // end anonymous namespace
+
+char HWAddressSanitizer::ID = 0;
+
+INITIALIZE_PASS_BEGIN(
+ HWAddressSanitizer, "hwasan",
+ "HWAddressSanitizer: detect memory bugs using tagged addressing.", false, false)
+INITIALIZE_PASS_END(
+ HWAddressSanitizer, "hwasan",
+ "HWAddressSanitizer: detect memory bugs using tagged addressing.", false, false)
+
+FunctionPass *llvm::createHWAddressSanitizerPass() {
+ return new HWAddressSanitizer();
+}
+
+/// \brief Module-level initialization.
+///
+/// inserts a call to __hwasan_init to the module's constructor list.
+bool HWAddressSanitizer::doInitialization(Module &M) {
+ DEBUG(dbgs() << "Init " << M.getName() << "\n");
+ auto &DL = M.getDataLayout();
+
+ Triple TargetTriple(M.getTargetTriple());
+
+ C = &(M.getContext());
+ IRBuilder<> IRB(*C);
+ IntptrTy = IRB.getIntPtrTy(DL);
+
+ std::tie(HwasanCtorFunction, std::ignore) =
+ createSanitizerCtorAndInitFunctions(M, kHwasanModuleCtorName,
+ kHwasanInitName,
+ /*InitArgTypes=*/{},
+ /*InitArgs=*/{});
+ appendToGlobalCtors(M, HwasanCtorFunction, 0);
+ return true;
+}
+
+void HWAddressSanitizer::initializeCallbacks(Module &M) {
+ IRBuilder<> IRB(*C);
+ for (size_t AccessIsWrite = 0; AccessIsWrite <= 1; AccessIsWrite++) {
+ const std::string TypeStr = AccessIsWrite ? "store" : "load";
+
+ HwasanMemoryAccessCallbackSized[AccessIsWrite] =
+ checkSanitizerInterfaceFunction(M.getOrInsertFunction(
+ ClMemoryAccessCallbackPrefix + TypeStr,
+ FunctionType::get(IRB.getVoidTy(), {IntptrTy, IntptrTy}, false)));
+
+ for (size_t AccessSizeIndex = 0; AccessSizeIndex < kNumberOfAccessSizes;
+ AccessSizeIndex++) {
+ HwasanMemoryAccessCallback[AccessIsWrite][AccessSizeIndex] =
+ checkSanitizerInterfaceFunction(M.getOrInsertFunction(
+ ClMemoryAccessCallbackPrefix + TypeStr +
+ itostr(1ULL << AccessSizeIndex),
+ FunctionType::get(IRB.getVoidTy(), {IntptrTy}, false)));
+ }
+ }
+}
+
+Value *HWAddressSanitizer::isInterestingMemoryAccess(Instruction *I,
+ bool *IsWrite,
+ uint64_t *TypeSize,
+ unsigned *Alignment,
+ Value **MaybeMask) {
+ // Skip memory accesses inserted by another instrumentation.
+ if (I->getMetadata("nosanitize")) return nullptr;
+
+ Value *PtrOperand = nullptr;
+ const DataLayout &DL = I->getModule()->getDataLayout();
+ if (LoadInst *LI = dyn_cast<LoadInst>(I)) {
+ if (!ClInstrumentReads) return nullptr;
+ *IsWrite = false;
+ *TypeSize = DL.getTypeStoreSizeInBits(LI->getType());
+ *Alignment = LI->getAlignment();
+ PtrOperand = LI->getPointerOperand();
+ } else if (StoreInst *SI = dyn_cast<StoreInst>(I)) {
+ if (!ClInstrumentWrites) return nullptr;
+ *IsWrite = true;
+ *TypeSize = DL.getTypeStoreSizeInBits(SI->getValueOperand()->getType());
+ *Alignment = SI->getAlignment();
+ PtrOperand = SI->getPointerOperand();
+ } else if (AtomicRMWInst *RMW = dyn_cast<AtomicRMWInst>(I)) {
+ if (!ClInstrumentAtomics) return nullptr;
+ *IsWrite = true;
+ *TypeSize = DL.getTypeStoreSizeInBits(RMW->getValOperand()->getType());
+ *Alignment = 0;
+ PtrOperand = RMW->getPointerOperand();
+ } else if (AtomicCmpXchgInst *XCHG = dyn_cast<AtomicCmpXchgInst>(I)) {
+ if (!ClInstrumentAtomics) return nullptr;
+ *IsWrite = true;
+ *TypeSize = DL.getTypeStoreSizeInBits(XCHG->getCompareOperand()->getType());
+ *Alignment = 0;
+ PtrOperand = XCHG->getPointerOperand();
+ }
+
+ if (PtrOperand) {
+ // Do not instrument acesses from different address spaces; we cannot deal
+ // with them.
+ Type *PtrTy = cast<PointerType>(PtrOperand->getType()->getScalarType());
+ if (PtrTy->getPointerAddressSpace() != 0)
+ return nullptr;
+
+ // Ignore swifterror addresses.
+ // swifterror memory addresses are mem2reg promoted by instruction
+ // selection. As such they cannot have regular uses like an instrumentation
+ // function and it makes no sense to track them as memory.
+ if (PtrOperand->isSwiftError())
+ return nullptr;
+ }
+
+ return PtrOperand;
+}
+
+static size_t TypeSizeToSizeIndex(uint32_t TypeSize) {
+ size_t Res = countTrailingZeros(TypeSize / 8);
+ assert(Res < kNumberOfAccessSizes);
+ return Res;
+}
+
+bool HWAddressSanitizer::instrumentMemAccess(Instruction *I) {
+ DEBUG(dbgs() << "Instrumenting: " << *I << "\n");
+ bool IsWrite = false;
+ unsigned Alignment = 0;
+ uint64_t TypeSize = 0;
+ Value *MaybeMask = nullptr;
+ Value *Addr =
+ isInterestingMemoryAccess(I, &IsWrite, &TypeSize, &Alignment, &MaybeMask);
+
+ if (!Addr)
+ return false;
+
+ if (MaybeMask)
+ return false; //FIXME
+
+ IRBuilder<> IRB(I);
+ Value *AddrLong = IRB.CreatePointerCast(Addr, IntptrTy);
+ if (isPowerOf2_64(TypeSize) &&
+ (TypeSize / 8 <= (1UL << (kNumberOfAccessSizes - 1)))) {
+ size_t AccessSizeIndex = TypeSizeToSizeIndex(TypeSize);
+ IRB.CreateCall(HwasanMemoryAccessCallback[IsWrite][AccessSizeIndex],
+ AddrLong);
+ } else {
+ IRB.CreateCall(HwasanMemoryAccessCallbackSized[IsWrite],
+ {AddrLong, ConstantInt::get(IntptrTy, TypeSize / 8)});
+ }
+
+ return true;
+}
+
+bool HWAddressSanitizer::runOnFunction(Function &F) {
+ if (&F == HwasanCtorFunction)
+ return false;
+
+ if (!F.hasFnAttribute(Attribute::SanitizeHWAddress))
+ return false;
+
+ DEBUG(dbgs() << "Function: " << F.getName() << "\n");
+
+ initializeCallbacks(*F.getParent());
+
+ bool Changed = false;
+ SmallVector<Instruction*, 16> ToInstrument;
+ for (auto &BB : F) {
+ for (auto &Inst : BB) {
+ Value *MaybeMask = nullptr;
+ bool IsWrite;
+ unsigned Alignment;
+ uint64_t TypeSize;
+ Value *Addr = isInterestingMemoryAccess(&Inst, &IsWrite, &TypeSize,
+ &Alignment, &MaybeMask);
+ if (Addr || isa<MemIntrinsic>(Inst))
+ ToInstrument.push_back(&Inst);
+ }
+ }
+
+ for (auto Inst : ToInstrument)
+ Changed |= instrumentMemAccess(Inst);
+
+ return Changed;
+}
initializePGOMemOPSizeOptLegacyPassPass(Registry);
initializeInstrProfilingLegacyPassPass(Registry);
initializeMemorySanitizerPass(Registry);
+ initializeHWAddressSanitizerPass(Registry);
initializeThreadSanitizerPass(Registry);
initializeSanitizerCoverageModulePass(Registry);
initializeDataFlowSanitizerPass(Registry);
/// non-local by performing PHI construction.
bool GVN::processNonLocalLoad(LoadInst *LI) {
// non-local speculations are not allowed under asan.
- if (LI->getParent()->getParent()->hasFnAttribute(Attribute::SanitizeAddress))
+ if (LI->getParent()->getParent()->hasFnAttribute(
+ Attribute::SanitizeAddress) ||
+ LI->getParent()->getParent()->hasFnAttribute(
+ Attribute::SanitizeHWAddress))
return false;
// Step 1: Find the non-local dependencies of the load.
; CHECK: define void @f34()
{
call void @nobuiltin() nobuiltin
-; CHECK: call void @nobuiltin() #34
+; CHECK: call void @nobuiltin() #35
ret void;
}
ret void
}
+; CHECK: define void @f58() #34
+define void @f58() sanitize_hwaddress
+{
+ ret void;
+}
+
; CHECK: attributes #0 = { noreturn }
; CHECK: attributes #1 = { nounwind }
; CHECK: attributes #2 = { readnone }
; CHECK: attributes #31 = { allocsize(0,1) }
; CHECK: attributes #32 = { writeonly }
; CHECK: attributes #33 = { speculatable }
-; CHECK: attributes #34 = { nobuiltin }
+; CHECK: attributes #34 = { sanitize_hwaddress }
+; CHECK: attributes #35 = { nobuiltin }
--- /dev/null
+; Test basic address sanitizer instrumentation.
+;
+; RUN: opt < %s -hwasan -S | FileCheck %s
+
+target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
+target triple = "aarch64--linux-android"
+
+define void @atomicrmw(i64* %ptr) sanitize_hwaddress {
+; CHECK-LABEL: @atomicrmw(
+; CHECK: %[[A:[^ ]*]] = ptrtoint i64* %ptr to i64
+; CHECK: call void @__hwasan_store8(i64 %[[A]])
+
+entry:
+ %0 = atomicrmw add i64* %ptr, i64 1 seq_cst
+ ret void
+}
+
+define void @cmpxchg(i64* %ptr, i64 %compare_to, i64 %new_value) sanitize_hwaddress {
+; CHECK-LABEL: @cmpxchg(
+; CHECK: %[[A:[^ ]*]] = ptrtoint i64* %ptr to i64
+; CHECK: call void @__hwasan_store8(i64 %[[A]])
+
+entry:
+ %0 = cmpxchg i64* %ptr, i64 %compare_to, i64 %new_value seq_cst seq_cst
+ ret void
+}
--- /dev/null
+; Test basic address sanitizer instrumentation.
+;
+; RUN: opt < %s -hwasan -S | FileCheck %s
+
+target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
+target triple = "aarch64--linux-android"
+
+define i8 @test_load8(i8* %a) sanitize_hwaddress {
+; CHECK-LABEL: @test_load8(
+; CHECK: %[[A:[^ ]*]] = ptrtoint i8* %a to i64
+; CHECK: call void @__hwasan_load1(i64 %[[A]])
+; CHECK: %[[B:[^ ]*]] = load i8, i8* %a
+; CHECK: ret i8 %[[B]]
+
+entry:
+ %b = load i8, i8* %a, align 4
+ ret i8 %b
+}
+
+define i16 @test_load16(i16* %a) sanitize_hwaddress {
+; CHECK-LABEL: @test_load16(
+; CHECK: %[[A:[^ ]*]] = ptrtoint i16* %a to i64
+; CHECK: call void @__hwasan_load2(i64 %[[A]])
+; CHECK: %[[B:[^ ]*]] = load i16, i16* %a
+; CHECK: ret i16 %[[B]]
+
+entry:
+ %b = load i16, i16* %a, align 4
+ ret i16 %b
+}
+
+define i32 @test_load32(i32* %a) sanitize_hwaddress {
+; CHECK-LABEL: @test_load32(
+; CHECK: %[[A:[^ ]*]] = ptrtoint i32* %a to i64
+; CHECK: call void @__hwasan_load4(i64 %[[A]])
+; CHECK: %[[B:[^ ]*]] = load i32, i32* %a
+; CHECK: ret i32 %[[B]]
+
+entry:
+ %b = load i32, i32* %a, align 4
+ ret i32 %b
+}
+
+define i64 @test_load64(i64* %a) sanitize_hwaddress {
+; CHECK-LABEL: @test_load64(
+; CHECK: %[[A:[^ ]*]] = ptrtoint i64* %a to i64
+; CHECK: call void @__hwasan_load8(i64 %[[A]])
+; CHECK: %[[B:[^ ]*]] = load i64, i64* %a
+; CHECK: ret i64 %[[B]]
+
+entry:
+ %b = load i64, i64* %a, align 8
+ ret i64 %b
+}
+
+define i128 @test_load128(i128* %a) sanitize_hwaddress {
+; CHECK-LABEL: @test_load128(
+; CHECK: %[[A:[^ ]*]] = ptrtoint i128* %a to i64
+; CHECK: call void @__hwasan_load16(i64 %[[A]])
+; CHECK: %[[B:[^ ]*]] = load i128, i128* %a
+; CHECK: ret i128 %[[B]]
+
+entry:
+ %b = load i128, i128* %a, align 16
+ ret i128 %b
+}
+
+define i40 @test_load40(i40* %a) sanitize_hwaddress {
+; CHECK-LABEL: @test_load40(
+; CHECK: %[[A:[^ ]*]] = ptrtoint i40* %a to i64
+; CHECK: call void @__hwasan_load(i64 %[[A]], i64 5)
+; CHECK: %[[B:[^ ]*]] = load i40, i40* %a
+; CHECK: ret i40 %[[B]]
+
+entry:
+ %b = load i40, i40* %a, align 4
+ ret i40 %b
+}
+
+define void @test_store8(i8* %a, i8 %b) sanitize_hwaddress {
+; CHECK-LABEL: @test_store8(
+; CHECK: %[[A:[^ ]*]] = ptrtoint i8* %a to i64
+; CHECK: call void @__hwasan_store1(i64 %[[A]])
+; CHECK: store i8 %b, i8* %a
+; CHECK: ret void
+
+entry:
+ store i8 %b, i8* %a, align 4
+ ret void
+}
+
+define void @test_store16(i16* %a, i16 %b) sanitize_hwaddress {
+; CHECK-LABEL: @test_store16(
+; CHECK: %[[A:[^ ]*]] = ptrtoint i16* %a to i64
+; CHECK: call void @__hwasan_store2(i64 %[[A]])
+; CHECK: store i16 %b, i16* %a
+; CHECK: ret void
+
+entry:
+ store i16 %b, i16* %a, align 4
+ ret void
+}
+
+define void @test_store32(i32* %a, i32 %b) sanitize_hwaddress {
+; CHECK-LABEL: @test_store32(
+; CHECK: %[[A:[^ ]*]] = ptrtoint i32* %a to i64
+; CHECK: call void @__hwasan_store4(i64 %[[A]])
+; CHECK: store i32 %b, i32* %a
+; CHECK: ret void
+
+entry:
+ store i32 %b, i32* %a, align 4
+ ret void
+}
+
+define void @test_store64(i64* %a, i64 %b) sanitize_hwaddress {
+; CHECK-LABEL: @test_store64(
+; CHECK: %[[A:[^ ]*]] = ptrtoint i64* %a to i64
+; CHECK: call void @__hwasan_store8(i64 %[[A]])
+; CHECK: store i64 %b, i64* %a
+; CHECK: ret void
+
+entry:
+ store i64 %b, i64* %a, align 4
+ ret void
+}
+
+define void @test_store128(i128* %a, i128 %b) sanitize_hwaddress {
+; CHECK-LABEL: @test_store128(
+; CHECK: %[[A:[^ ]*]] = ptrtoint i128* %a to i64
+; CHECK: call void @__hwasan_store16(i64 %[[A]])
+; CHECK: store i128 %b, i128* %a
+; CHECK: ret void
+
+entry:
+ store i128 %b, i128* %a, align 4
+ ret void
+}
+
+define void @test_store40(i40* %a, i40 %b) sanitize_hwaddress {
+; CHECK-LABEL: @test_store40(
+; CHECK: %[[A:[^ ]*]] = ptrtoint i40* %a to i64
+; CHECK: call void @__hwasan_store(i64 %[[A]], i64 5)
+; CHECK: store i40 %b, i40* %a
+; CHECK: ret void
+
+entry:
+ store i40 %b, i40* %a, align 4
+ ret void
+}
+
+define i8 @test_load_noattr(i8* %a) {
+; CHECK-LABEL: @test_load_noattr(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: %[[B:[^ ]*]] = load i8, i8* %a
+; CHECK-NEXT: ret i8 %[[B]]
+
+entry:
+ %b = load i8, i8* %a, align 4
+ ret i8 %b
+}
+
+define i8 @test_load_notmyattr(i8* %a) sanitize_address {
+; CHECK-LABEL: @test_load_notmyattr(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: %[[B:[^ ]*]] = load i8, i8* %a
+; CHECK-NEXT: ret i8 %[[B]]
+
+entry:
+ %b = load i8, i8* %a, align 4
+ ret i8 %b
+}
+
+define i8 @test_load_addrspace(i8 addrspace(256)* %a) sanitize_hwaddress {
+; CHECK-LABEL: @test_load_addrspace(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: %[[B:[^ ]*]] = load i8, i8 addrspace(256)* %a
+; CHECK-NEXT: ret i8 %[[B]]
+
+entry:
+ %b = load i8, i8 addrspace(256)* %a, align 4
+ ret i8 %b
+}
+
+; CHECK: declare void @__hwasan_init()
+
+; CHECK: define internal void @hwasan.module_ctor() {
+; CHECK-NEXT: call void @__hwasan_init()
+; CHECK-NEXT: ret void
+; CHECK-NEXT: }
; CHECK-NOT: %[[LOAD:[^ ]+]] = load i32
; CHECK: {{.*}} = phi
+
+define i32 @TestHWAsan() sanitize_hwaddress {
+ %1 = tail call noalias i8* @_Znam(i64 2)
+ %2 = getelementptr inbounds i8, i8* %1, i64 1
+ store i8 0, i8* %2, align 1
+ store i8 0, i8* %1, align 1
+ %3 = bitcast i8* %1 to i16*
+ %4 = load i16, i16* %3, align 4
+ %5 = icmp eq i16 %4, 0
+ br i1 %5, label %11, label %6
+
+; <label>:6 ; preds = %0
+ %7 = getelementptr inbounds i8, i8* %1, i64 2
+ %8 = bitcast i8* %7 to i16*
+ %9 = load i16, i16* %8, align 2
+ %10 = sext i16 %9 to i32
+ br label %11
+
+; <label>:11 ; preds = %0, %6
+ %12 = phi i32 [ %10, %6 ], [ 0, %0 ]
+ ret i32 %12
+}
+
+; CHECK-LABEL: @TestHWAsan
+; CHECK-NOT: %[[LOAD:[^ ]+]] = load i32
+; CHECK: {{.*}} = phi
+
ret i32 %i
}
+define i32 @sanitize_hwaddress_callee(i32 %i) sanitize_hwaddress {
+ ret i32 %i
+}
+
define i32 @sanitize_thread_callee(i32 %i) sanitize_thread {
ret i32 %i
}
ret i32 %i
}
+define i32 @alwaysinline_sanitize_hwaddress_callee(i32 %i) alwaysinline sanitize_hwaddress {
+ ret i32 %i
+}
+
define i32 @alwaysinline_sanitize_thread_callee(i32 %i) alwaysinline sanitize_thread {
ret i32 %i
}
; CHECK-NEXT: ret i32
}
+define i32 @test_no_sanitize_hwaddress(i32 %arg) {
+ %x1 = call i32 @noattr_callee(i32 %arg)
+ %x2 = call i32 @sanitize_hwaddress_callee(i32 %x1)
+ %x3 = call i32 @alwaysinline_callee(i32 %x2)
+ %x4 = call i32 @alwaysinline_sanitize_hwaddress_callee(i32 %x3)
+ ret i32 %x4
+; CHECK-LABEL: @test_no_sanitize_hwaddress(
+; CHECK-NEXT: @sanitize_hwaddress_callee
+; CHECK-NEXT: ret i32
+}
+
define i32 @test_no_sanitize_memory(i32 %arg) {
%x1 = call i32 @noattr_callee(i32 %arg)
%x2 = call i32 @sanitize_memory_callee(i32 %x1)
; CHECK-NEXT: ret i32
}
+define i32 @test_sanitize_hwaddress(i32 %arg) sanitize_hwaddress {
+ %x1 = call i32 @noattr_callee(i32 %arg)
+ %x2 = call i32 @sanitize_hwaddress_callee(i32 %x1)
+ %x3 = call i32 @alwaysinline_callee(i32 %x2)
+ %x4 = call i32 @alwaysinline_sanitize_hwaddress_callee(i32 %x3)
+ ret i32 %x4
+; CHECK-LABEL: @test_sanitize_hwaddress(
+; CHECK-NEXT: @noattr_callee
+; CHECK-NEXT: ret i32
+}
+
define i32 @test_sanitize_memory(i32 %arg) sanitize_memory {
%x1 = call i32 @noattr_callee(i32 %arg)
%x2 = call i32 @sanitize_memory_callee(i32 %x1)
ret void
}
+define void @hwasan() sanitize_hwaddress {
+entry:
+ ; CHECK-LABEL: @hwasan(
+ %text = alloca i8, align 1
+
+ call void @llvm.lifetime.start.p0i8(i64 1, i8* %text)
+ call void @llvm.lifetime.end.p0i8(i64 1, i8* %text)
+ ; CHECK: call void @llvm.lifetime.start
+ ; CHECK-NEXT: call void @llvm.lifetime.end
+
+ call void @foo(i8* %text) ; Keep alloca alive
+
+ ret void
+}
define void @no_asan() {
entry:
; CHECK-NOT: %[[LOAD:[^ ]+]] = load i32
; CHECK: {{.*}} = phi
+define i32 @TestHWAsan() sanitize_hwaddress {
+ %1 = tail call noalias i8* @_Znam(i64 2)
+ %2 = getelementptr inbounds i8, i8* %1, i64 1
+ store i8 0, i8* %2, align 1
+ store i8 0, i8* %1, align 1
+ %3 = bitcast i8* %1 to i16*
+ %4 = load i16, i16* %3, align 4
+ %5 = icmp eq i16 %4, 0
+ br i1 %5, label %11, label %6
+
+; <label>:6 ; preds = %0
+ %7 = getelementptr inbounds i8, i8* %1, i64 2
+ %8 = bitcast i8* %7 to i16*
+ %9 = load i16, i16* %8, align 2
+ %10 = sext i16 %9 to i32
+ br label %11
+
+; <label>:11 ; preds = %0, %6
+ %12 = phi i32 [ %10, %6 ], [ 0, %0 ]
+ ret i32 %12
+}
+
+; CHECK-LABEL: @TestHWAsan
+; CHECK-NOT: %[[LOAD:[^ ]+]] = load i32
+; CHECK: {{.*}} = phi
+
; CHECK: br label
; CHECK: ret i32
}
+
+define i32 @TestHWAsan(i32 %cond) nounwind readonly uwtable sanitize_hwaddress {
+entry:
+ %tobool = icmp eq i32 %cond, 0
+ br i1 %tobool, label %return, label %if.then
+
+if.then: ; preds = %entry
+ %0 = load i32, i32* @g, align 4
+ br label %return
+
+return: ; preds = %entry, %if.then
+ %retval = phi i32 [ %0, %if.then ], [ 0, %entry ]
+ ret i32 %retval
+; CHECK-LABEL: @TestHWAsan
+; CHECK: br i1
+; CHECK: load i32, i32* @g
+; CHECK: br label
+; CHECK: ret i32
+}
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