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-rw-r--r--lib/Transforms/Instrumentation/SanitizerCoverage.cpp260
1 files changed, 211 insertions, 49 deletions
diff --git a/lib/Transforms/Instrumentation/SanitizerCoverage.cpp b/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
index 06fe07598374..d950e2e730f2 100644
--- a/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
+++ b/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
@@ -17,12 +17,16 @@
#include "llvm/Analysis/PostDominators.h"
#include "llvm/IR/CFG.h"
#include "llvm/IR/CallSite.h"
+#include "llvm/IR/Constant.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/Function.h"
+#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/InlineAsm.h"
+#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/IR/Module.h"
@@ -46,6 +50,14 @@ static const char *const SanCovTraceCmp1 = "__sanitizer_cov_trace_cmp1";
static const char *const SanCovTraceCmp2 = "__sanitizer_cov_trace_cmp2";
static const char *const SanCovTraceCmp4 = "__sanitizer_cov_trace_cmp4";
static const char *const SanCovTraceCmp8 = "__sanitizer_cov_trace_cmp8";
+static const char *const SanCovTraceConstCmp1 =
+ "__sanitizer_cov_trace_const_cmp1";
+static const char *const SanCovTraceConstCmp2 =
+ "__sanitizer_cov_trace_const_cmp2";
+static const char *const SanCovTraceConstCmp4 =
+ "__sanitizer_cov_trace_const_cmp4";
+static const char *const SanCovTraceConstCmp8 =
+ "__sanitizer_cov_trace_const_cmp8";
static const char *const SanCovTraceDiv4 = "__sanitizer_cov_trace_div4";
static const char *const SanCovTraceDiv8 = "__sanitizer_cov_trace_div8";
static const char *const SanCovTraceGep = "__sanitizer_cov_trace_gep";
@@ -57,11 +69,15 @@ static const char *const SanCovTracePCGuardName =
"__sanitizer_cov_trace_pc_guard";
static const char *const SanCovTracePCGuardInitName =
"__sanitizer_cov_trace_pc_guard_init";
-static const char *const SanCov8bitCountersInitName =
+static const char *const SanCov8bitCountersInitName =
"__sanitizer_cov_8bit_counters_init";
+static const char *const SanCovPCsInitName = "__sanitizer_cov_pcs_init";
static const char *const SanCovGuardsSectionName = "sancov_guards";
static const char *const SanCovCountersSectionName = "sancov_cntrs";
+static const char *const SanCovPCsSectionName = "sancov_pcs";
+
+static const char *const SanCovLowestStackName = "__sancov_lowest_stack";
static cl::opt<int> ClCoverageLevel(
"sanitizer-coverage-level",
@@ -77,9 +93,19 @@ static cl::opt<bool> ClTracePCGuard("sanitizer-coverage-trace-pc-guard",
cl::desc("pc tracing with a guard"),
cl::Hidden, cl::init(false));
-static cl::opt<bool> ClInline8bitCounters("sanitizer-coverage-inline-8bit-counters",
- cl::desc("increments 8-bit counter for every edge"),
- cl::Hidden, cl::init(false));
+// If true, we create a global variable that contains PCs of all instrumented
+// BBs, put this global into a named section, and pass this section's bounds
+// to __sanitizer_cov_pcs_init.
+// This way the coverage instrumentation does not need to acquire the PCs
+// at run-time. Works with trace-pc-guard and inline-8bit-counters.
+static cl::opt<bool> ClCreatePCTable("sanitizer-coverage-pc-table",
+ cl::desc("create a static PC table"),
+ cl::Hidden, cl::init(false));
+
+static cl::opt<bool>
+ ClInline8bitCounters("sanitizer-coverage-inline-8bit-counters",
+ cl::desc("increments 8-bit counter for every edge"),
+ cl::Hidden, cl::init(false));
static cl::opt<bool>
ClCMPTracing("sanitizer-coverage-trace-compares",
@@ -99,6 +125,10 @@ static cl::opt<bool>
cl::desc("Reduce the number of instrumented blocks"),
cl::Hidden, cl::init(true));
+static cl::opt<bool> ClStackDepth("sanitizer-coverage-stack-depth",
+ cl::desc("max stack depth tracing"),
+ cl::Hidden, cl::init(false));
+
namespace {
SanitizerCoverageOptions getOptions(int LegacyCoverageLevel) {
@@ -135,9 +165,12 @@ SanitizerCoverageOptions OverrideFromCL(SanitizerCoverageOptions Options) {
Options.TracePC |= ClTracePC;
Options.TracePCGuard |= ClTracePCGuard;
Options.Inline8bitCounters |= ClInline8bitCounters;
- if (!Options.TracePCGuard && !Options.TracePC && !Options.Inline8bitCounters)
- Options.TracePCGuard = true; // TracePCGuard is default.
+ Options.PCTable |= ClCreatePCTable;
Options.NoPrune |= !ClPruneBlocks;
+ Options.StackDepth |= ClStackDepth;
+ if (!Options.TracePCGuard && !Options.TracePC &&
+ !Options.Inline8bitCounters && !Options.StackDepth)
+ Options.TracePCGuard = true; // TracePCGuard is default.
return Options;
}
@@ -168,14 +201,19 @@ private:
ArrayRef<GetElementPtrInst *> GepTraceTargets);
void InjectTraceForSwitch(Function &F,
ArrayRef<Instruction *> SwitchTraceTargets);
- bool InjectCoverage(Function &F, ArrayRef<BasicBlock *> AllBlocks);
+ bool InjectCoverage(Function &F, ArrayRef<BasicBlock *> AllBlocks,
+ bool IsLeafFunc = true);
GlobalVariable *CreateFunctionLocalArrayInSection(size_t NumElements,
Function &F, Type *Ty,
const char *Section);
- void CreateFunctionLocalArrays(size_t NumGuards, Function &F);
- void InjectCoverageAtBlock(Function &F, BasicBlock &BB, size_t Idx);
- void CreateInitCallForSection(Module &M, const char *InitFunctionName,
- Type *Ty, const std::string &Section);
+ GlobalVariable *CreatePCArray(Function &F, ArrayRef<BasicBlock *> AllBlocks);
+ void CreateFunctionLocalArrays(Function &F, ArrayRef<BasicBlock *> AllBlocks);
+ void InjectCoverageAtBlock(Function &F, BasicBlock &BB, size_t Idx,
+ bool IsLeafFunc = true);
+ Function *CreateInitCallsForSections(Module &M, const char *InitFunctionName,
+ Type *Ty, const char *Section);
+ std::pair<GlobalVariable *, GlobalVariable *>
+ CreateSecStartEnd(Module &M, const char *Section, Type *Ty);
void SetNoSanitizeMetadata(Instruction *I) {
I->setMetadata(I->getModule()->getMDKindID("nosanitize"),
@@ -188,12 +226,14 @@ private:
Function *SanCovTracePCIndir;
Function *SanCovTracePC, *SanCovTracePCGuard;
Function *SanCovTraceCmpFunction[4];
+ Function *SanCovTraceConstCmpFunction[4];
Function *SanCovTraceDivFunction[2];
Function *SanCovTraceGepFunction;
Function *SanCovTraceSwitchFunction;
+ GlobalVariable *SanCovLowestStack;
InlineAsm *EmptyAsm;
Type *IntptrTy, *IntptrPtrTy, *Int64Ty, *Int64PtrTy, *Int32Ty, *Int32PtrTy,
- *Int8Ty, *Int8PtrTy;
+ *Int16Ty, *Int8Ty, *Int8PtrTy;
Module *CurModule;
Triple TargetTriple;
LLVMContext *C;
@@ -201,17 +241,17 @@ private:
GlobalVariable *FunctionGuardArray; // for trace-pc-guard.
GlobalVariable *Function8bitCounterArray; // for inline-8bit-counters.
+ GlobalVariable *FunctionPCsArray; // for pc-table.
+ SmallVector<GlobalValue *, 20> GlobalsToAppendToUsed;
SanitizerCoverageOptions Options;
};
} // namespace
-void SanitizerCoverageModule::CreateInitCallForSection(
- Module &M, const char *InitFunctionName, Type *Ty,
- const std::string &Section) {
- IRBuilder<> IRB(M.getContext());
- Function *CtorFunc;
+std::pair<GlobalVariable *, GlobalVariable *>
+SanitizerCoverageModule::CreateSecStartEnd(Module &M, const char *Section,
+ Type *Ty) {
GlobalVariable *SecStart =
new GlobalVariable(M, Ty, false, GlobalVariable::ExternalLinkage, nullptr,
getSectionStart(Section));
@@ -221,6 +261,18 @@ void SanitizerCoverageModule::CreateInitCallForSection(
nullptr, getSectionEnd(Section));
SecEnd->setVisibility(GlobalValue::HiddenVisibility);
+ return std::make_pair(SecStart, SecEnd);
+}
+
+
+Function *SanitizerCoverageModule::CreateInitCallsForSections(
+ Module &M, const char *InitFunctionName, Type *Ty,
+ const char *Section) {
+ IRBuilder<> IRB(M.getContext());
+ auto SecStartEnd = CreateSecStartEnd(M, Section, Ty);
+ auto SecStart = SecStartEnd.first;
+ auto SecEnd = SecStartEnd.second;
+ Function *CtorFunc;
std::tie(CtorFunc, std::ignore) = createSanitizerCtorAndInitFunctions(
M, SanCovModuleCtorName, InitFunctionName, {Ty, Ty},
{IRB.CreatePointerCast(SecStart, Ty), IRB.CreatePointerCast(SecEnd, Ty)});
@@ -232,6 +284,7 @@ void SanitizerCoverageModule::CreateInitCallForSection(
} else {
appendToGlobalCtors(M, CtorFunc, SanCtorAndDtorPriority);
}
+ return CtorFunc;
}
bool SanitizerCoverageModule::runOnModule(Module &M) {
@@ -243,6 +296,7 @@ bool SanitizerCoverageModule::runOnModule(Module &M) {
TargetTriple = Triple(M.getTargetTriple());
FunctionGuardArray = nullptr;
Function8bitCounterArray = nullptr;
+ FunctionPCsArray = nullptr;
IntptrTy = Type::getIntNTy(*C, DL->getPointerSizeInBits());
IntptrPtrTy = PointerType::getUnqual(IntptrTy);
Type *VoidTy = Type::getVoidTy(*C);
@@ -252,6 +306,7 @@ bool SanitizerCoverageModule::runOnModule(Module &M) {
Int8PtrTy = PointerType::getUnqual(IRB.getInt8Ty());
Int64Ty = IRB.getInt64Ty();
Int32Ty = IRB.getInt32Ty();
+ Int16Ty = IRB.getInt16Ty();
Int8Ty = IRB.getInt8Ty();
SanCovTracePCIndir = checkSanitizerInterfaceFunction(
@@ -269,6 +324,19 @@ bool SanitizerCoverageModule::runOnModule(Module &M) {
checkSanitizerInterfaceFunction(M.getOrInsertFunction(
SanCovTraceCmp8, VoidTy, Int64Ty, Int64Ty));
+ SanCovTraceConstCmpFunction[0] =
+ checkSanitizerInterfaceFunction(M.getOrInsertFunction(
+ SanCovTraceConstCmp1, VoidTy, Int8Ty, Int8Ty));
+ SanCovTraceConstCmpFunction[1] =
+ checkSanitizerInterfaceFunction(M.getOrInsertFunction(
+ SanCovTraceConstCmp2, VoidTy, Int16Ty, Int16Ty));
+ SanCovTraceConstCmpFunction[2] =
+ checkSanitizerInterfaceFunction(M.getOrInsertFunction(
+ SanCovTraceConstCmp4, VoidTy, Int32Ty, Int32Ty));
+ SanCovTraceConstCmpFunction[3] =
+ checkSanitizerInterfaceFunction(M.getOrInsertFunction(
+ SanCovTraceConstCmp8, VoidTy, Int64Ty, Int64Ty));
+
SanCovTraceDivFunction[0] =
checkSanitizerInterfaceFunction(M.getOrInsertFunction(
SanCovTraceDiv4, VoidTy, IRB.getInt32Ty()));
@@ -281,12 +349,23 @@ bool SanitizerCoverageModule::runOnModule(Module &M) {
SanCovTraceSwitchFunction =
checkSanitizerInterfaceFunction(M.getOrInsertFunction(
SanCovTraceSwitchName, VoidTy, Int64Ty, Int64PtrTy));
+
+ Constant *SanCovLowestStackConstant =
+ M.getOrInsertGlobal(SanCovLowestStackName, IntptrTy);
+ SanCovLowestStack = cast<GlobalVariable>(SanCovLowestStackConstant);
+ SanCovLowestStack->setThreadLocalMode(
+ GlobalValue::ThreadLocalMode::InitialExecTLSModel);
+ if (Options.StackDepth && !SanCovLowestStack->isDeclaration())
+ SanCovLowestStack->setInitializer(Constant::getAllOnesValue(IntptrTy));
+
// Make sure smaller parameters are zero-extended to i64 as required by the
// x86_64 ABI.
if (TargetTriple.getArch() == Triple::x86_64) {
for (int i = 0; i < 3; i++) {
SanCovTraceCmpFunction[i]->addParamAttr(0, Attribute::ZExt);
SanCovTraceCmpFunction[i]->addParamAttr(1, Attribute::ZExt);
+ SanCovTraceConstCmpFunction[i]->addParamAttr(0, Attribute::ZExt);
+ SanCovTraceConstCmpFunction[i]->addParamAttr(1, Attribute::ZExt);
}
SanCovTraceDivFunction[0]->addParamAttr(0, Attribute::ZExt);
}
@@ -305,13 +384,27 @@ bool SanitizerCoverageModule::runOnModule(Module &M) {
for (auto &F : M)
runOnFunction(F);
+ Function *Ctor = nullptr;
+
if (FunctionGuardArray)
- CreateInitCallForSection(M, SanCovTracePCGuardInitName, Int32PtrTy,
- SanCovGuardsSectionName);
+ Ctor = CreateInitCallsForSections(M, SanCovTracePCGuardInitName, Int32PtrTy,
+ SanCovGuardsSectionName);
if (Function8bitCounterArray)
- CreateInitCallForSection(M, SanCov8bitCountersInitName, Int8PtrTy,
- SanCovCountersSectionName);
-
+ Ctor = CreateInitCallsForSections(M, SanCov8bitCountersInitName, Int8PtrTy,
+ SanCovCountersSectionName);
+ if (Ctor && Options.PCTable) {
+ auto SecStartEnd = CreateSecStartEnd(M, SanCovPCsSectionName, IntptrPtrTy);
+ Function *InitFunction = declareSanitizerInitFunction(
+ M, SanCovPCsInitName, {IntptrPtrTy, IntptrPtrTy});
+ IRBuilder<> IRBCtor(Ctor->getEntryBlock().getTerminator());
+ IRBCtor.CreateCall(InitFunction,
+ {IRB.CreatePointerCast(SecStartEnd.first, IntptrPtrTy),
+ IRB.CreatePointerCast(SecStartEnd.second, IntptrPtrTy)});
+ }
+ // We don't reference these arrays directly in any of our runtime functions,
+ // so we need to prevent them from being dead stripped.
+ if (TargetTriple.isOSBinFormatMachO())
+ appendToUsed(M, GlobalsToAppendToUsed);
return true;
}
@@ -362,6 +455,10 @@ static bool shouldInstrumentBlock(const Function &F, const BasicBlock *BB,
if (Options.NoPrune || &F.getEntryBlock() == BB)
return true;
+ if (Options.CoverageType == SanitizerCoverageOptions::SCK_Function &&
+ &F.getEntryBlock() != BB)
+ return false;
+
// Do not instrument full dominators, or full post-dominators with multiple
// predecessors.
return !isFullDominator(BB, DT)
@@ -375,6 +472,9 @@ bool SanitizerCoverageModule::runOnFunction(Function &F) {
return false; // Should not instrument sanitizer init functions.
if (F.getName().startswith("__sanitizer_"))
return false; // Don't instrument __sanitizer_* callbacks.
+ // Don't touch available_externally functions, their actual body is elewhere.
+ if (F.getLinkage() == GlobalValue::AvailableExternallyLinkage)
+ return false;
// Don't instrument MSVC CRT configuration helpers. They may run before normal
// initialization.
if (F.getName() == "__local_stdio_printf_options" ||
@@ -399,6 +499,7 @@ bool SanitizerCoverageModule::runOnFunction(Function &F) {
&getAnalysis<DominatorTreeWrapperPass>(F).getDomTree();
const PostDominatorTree *PDT =
&getAnalysis<PostDominatorTreeWrapperPass>(F).getPostDomTree();
+ bool IsLeafFunc = true;
for (auto &BB : F) {
if (shouldInstrumentBlock(F, &BB, DT, PDT, Options))
@@ -423,10 +524,14 @@ bool SanitizerCoverageModule::runOnFunction(Function &F) {
if (Options.TraceGep)
if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(&Inst))
GepTraceTargets.push_back(GEP);
- }
+ if (Options.StackDepth)
+ if (isa<InvokeInst>(Inst) ||
+ (isa<CallInst>(Inst) && !isa<IntrinsicInst>(Inst)))
+ IsLeafFunc = false;
+ }
}
- InjectCoverage(F, BlocksToInstrument);
+ InjectCoverage(F, BlocksToInstrument, IsLeafFunc);
InjectCoverageForIndirectCalls(F, IndirCalls);
InjectTraceForCmp(F, CmpTraceTargets);
InjectTraceForSwitch(F, SwitchTraceTargets);
@@ -444,35 +549,65 @@ GlobalVariable *SanitizerCoverageModule::CreateFunctionLocalArrayInSection(
if (auto Comdat = F.getComdat())
Array->setComdat(Comdat);
Array->setSection(getSectionName(Section));
+ Array->setAlignment(Ty->isPointerTy() ? DL->getPointerSize()
+ : Ty->getPrimitiveSizeInBits() / 8);
return Array;
}
-void SanitizerCoverageModule::CreateFunctionLocalArrays(size_t NumGuards,
- Function &F) {
- if (Options.TracePCGuard)
+
+GlobalVariable *
+SanitizerCoverageModule::CreatePCArray(Function &F,
+ ArrayRef<BasicBlock *> AllBlocks) {
+ size_t N = AllBlocks.size();
+ assert(N);
+ SmallVector<Constant *, 32> PCs;
+ IRBuilder<> IRB(&*F.getEntryBlock().getFirstInsertionPt());
+ for (size_t i = 0; i < N; i++) {
+ if (&F.getEntryBlock() == AllBlocks[i]) {
+ PCs.push_back((Constant *)IRB.CreatePointerCast(&F, IntptrPtrTy));
+ PCs.push_back((Constant *)IRB.CreateIntToPtr(
+ ConstantInt::get(IntptrTy, 1), IntptrPtrTy));
+ } else {
+ PCs.push_back((Constant *)IRB.CreatePointerCast(
+ BlockAddress::get(AllBlocks[i]), IntptrPtrTy));
+ PCs.push_back((Constant *)IRB.CreateIntToPtr(
+ ConstantInt::get(IntptrTy, 0), IntptrPtrTy));
+ }
+ }
+ auto *PCArray = CreateFunctionLocalArrayInSection(N * 2, F, IntptrPtrTy,
+ SanCovPCsSectionName);
+ PCArray->setInitializer(
+ ConstantArray::get(ArrayType::get(IntptrPtrTy, N * 2), PCs));
+ PCArray->setConstant(true);
+
+ return PCArray;
+}
+
+void SanitizerCoverageModule::CreateFunctionLocalArrays(
+ Function &F, ArrayRef<BasicBlock *> AllBlocks) {
+ if (Options.TracePCGuard) {
FunctionGuardArray = CreateFunctionLocalArrayInSection(
- NumGuards, F, Int32Ty, SanCovGuardsSectionName);
- if (Options.Inline8bitCounters)
+ AllBlocks.size(), F, Int32Ty, SanCovGuardsSectionName);
+ GlobalsToAppendToUsed.push_back(FunctionGuardArray);
+ }
+ if (Options.Inline8bitCounters) {
Function8bitCounterArray = CreateFunctionLocalArrayInSection(
- NumGuards, F, Int8Ty, SanCovCountersSectionName);
+ AllBlocks.size(), F, Int8Ty, SanCovCountersSectionName);
+ GlobalsToAppendToUsed.push_back(Function8bitCounterArray);
+ }
+ if (Options.PCTable) {
+ FunctionPCsArray = CreatePCArray(F, AllBlocks);
+ GlobalsToAppendToUsed.push_back(FunctionPCsArray);
+ }
}
bool SanitizerCoverageModule::InjectCoverage(Function &F,
- ArrayRef<BasicBlock *> AllBlocks) {
+ ArrayRef<BasicBlock *> AllBlocks,
+ bool IsLeafFunc) {
if (AllBlocks.empty()) return false;
- switch (Options.CoverageType) {
- case SanitizerCoverageOptions::SCK_None:
- return false;
- case SanitizerCoverageOptions::SCK_Function:
- CreateFunctionLocalArrays(1, F);
- InjectCoverageAtBlock(F, F.getEntryBlock(), 0);
- return true;
- default: {
- CreateFunctionLocalArrays(AllBlocks.size(), F);
- for (size_t i = 0, N = AllBlocks.size(); i < N; i++)
- InjectCoverageAtBlock(F, *AllBlocks[i], i);
- return true;
- }
- }
+ CreateFunctionLocalArrays(F, AllBlocks);
+ for (size_t i = 0, N = AllBlocks.size(); i < N; i++)
+ InjectCoverageAtBlock(F, *AllBlocks[i], i, IsLeafFunc);
+ return true;
}
// On every indirect call we call a run-time function
@@ -585,16 +720,28 @@ void SanitizerCoverageModule::InjectTraceForCmp(
TypeSize == 64 ? 3 : -1;
if (CallbackIdx < 0) continue;
// __sanitizer_cov_trace_cmp((type_size << 32) | predicate, A0, A1);
+ auto CallbackFunc = SanCovTraceCmpFunction[CallbackIdx];
+ bool FirstIsConst = isa<ConstantInt>(A0);
+ bool SecondIsConst = isa<ConstantInt>(A1);
+ // If both are const, then we don't need such a comparison.
+ if (FirstIsConst && SecondIsConst) continue;
+ // If only one is const, then make it the first callback argument.
+ if (FirstIsConst || SecondIsConst) {
+ CallbackFunc = SanCovTraceConstCmpFunction[CallbackIdx];
+ if (SecondIsConst)
+ std::swap(A0, A1);
+ }
+
auto Ty = Type::getIntNTy(*C, TypeSize);
- IRB.CreateCall(
- SanCovTraceCmpFunction[CallbackIdx],
- {IRB.CreateIntCast(A0, Ty, true), IRB.CreateIntCast(A1, Ty, true)});
+ IRB.CreateCall(CallbackFunc, {IRB.CreateIntCast(A0, Ty, true),
+ IRB.CreateIntCast(A1, Ty, true)});
}
}
}
void SanitizerCoverageModule::InjectCoverageAtBlock(Function &F, BasicBlock &BB,
- size_t Idx) {
+ size_t Idx,
+ bool IsLeafFunc) {
BasicBlock::iterator IP = BB.getFirstInsertionPt();
bool IsEntryBB = &BB == &F.getEntryBlock();
DebugLoc EntryLoc;
@@ -633,6 +780,21 @@ void SanitizerCoverageModule::InjectCoverageAtBlock(Function &F, BasicBlock &BB,
SetNoSanitizeMetadata(Load);
SetNoSanitizeMetadata(Store);
}
+ if (Options.StackDepth && IsEntryBB && !IsLeafFunc) {
+ // Check stack depth. If it's the deepest so far, record it.
+ Function *GetFrameAddr =
+ Intrinsic::getDeclaration(F.getParent(), Intrinsic::frameaddress);
+ auto FrameAddrPtr =
+ IRB.CreateCall(GetFrameAddr, {Constant::getNullValue(Int32Ty)});
+ auto FrameAddrInt = IRB.CreatePtrToInt(FrameAddrPtr, IntptrTy);
+ auto LowestStack = IRB.CreateLoad(SanCovLowestStack);
+ auto IsStackLower = IRB.CreateICmpULT(FrameAddrInt, LowestStack);
+ auto ThenTerm = SplitBlockAndInsertIfThen(IsStackLower, &*IP, false);
+ IRBuilder<> ThenIRB(ThenTerm);
+ auto Store = ThenIRB.CreateStore(FrameAddrInt, SanCovLowestStack);
+ SetNoSanitizeMetadata(LowestStack);
+ SetNoSanitizeMetadata(Store);
+ }
}
std::string
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 13:03:28 +0000