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[llvm][AddressSanitizer] option for specifying the address space of the shadow map #167772

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Merged
merged 1 commit into from
Nov 18, 2025
Merged

[llvm][AddressSanitizer] option for specifying the address space of the shadow map #167772

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7 changes: 6 additions & 1 deletion llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -248,6 +248,11 @@ static cl::opt<bool>
"platforms that support this"),
cl::Hidden, cl::init(true));

static cl::opt<int>
ClShadowAddrSpace("asan-shadow-addr-space",
cl::desc("Address space for pointers to the shadow map"),
cl::Hidden, cl::init(0));

static cl::opt<bool> ClWithIfuncSuppressRemat(
"asan-with-ifunc-suppress-remat",
cl::desc("Suppress rematerialization of dynamic shadow address by passing "
Expand Down Expand Up @@ -1942,7 +1947,7 @@ void AddressSanitizer::instrumentAddress(Instruction *OrigIns,

Type *ShadowTy =
IntegerType::get(*C, std::max(8U, TypeStoreSize >> Mapping.Scale));
Type *ShadowPtrTy = PointerType::get(*C, 0);
Type *ShadowPtrTy = PointerType::get(*C, ClShadowAddrSpace);
Value *ShadowPtr = memToShadow(AddrLong, IRB);
const uint64_t ShadowAlign =
std::max<uint64_t>(Alignment.valueOrOne().value() >> Mapping.Scale, 1);
Expand Down
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