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Strip authentication bits from vtable load address #71128

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Merged
merged 1 commit into from
Nov 3, 2023
Merged

Strip authentication bits from vtable load address #71128

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7 changes: 5 additions & 2 deletions lldb/source/Plugins/LanguageRuntime/CPlusPlus/ItaniumABI/ItaniumABILanguageRuntime.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -235,14 +235,17 @@ llvm::Expected<LanguageRuntime::VTableInfo>
"failed to get the address of the value");

Status error;
const lldb::addr_t vtable_load_addr =
lldb::addr_t vtable_load_addr =
process->ReadPointerFromMemory(original_ptr, error);

if (!error.Success() || vtable_load_addr == LLDB_INVALID_ADDRESS)
return llvm::createStringError(std::errc::invalid_argument,
"failed to read vtable pointer from memory at 0x%" PRIx64,
original_ptr);
;

// The vtable load address can have authentication bits with
// AArch64 targets on Darwin.
vtable_load_addr = process->FixDataAddress(vtable_load_addr);

// Find the symbol that contains the "vtable_load_addr" address
Address vtable_addr;
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