| //===-- CXXFunctionPointer.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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "lldb/DataFormatters/CXXFunctionPointer.h" |
| |
| #include "lldb/Target/ABI.h" |
| #include "lldb/Target/SectionLoadList.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Utility/Stream.h" |
| #include "lldb/ValueObject/ValueObject.h" |
| #include "lldb/lldb-enumerations.h" |
| |
| #include <string> |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| using namespace lldb_private::formatters; |
| |
| bool lldb_private::formatters::CXXFunctionPointerSummaryProvider( |
| ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) { |
| std::string destination; |
| StreamString sstr; |
| AddressType func_ptr_address_type = eAddressTypeInvalid; |
| addr_t func_ptr_address = valobj.GetPointerValue(&func_ptr_address_type); |
| if (func_ptr_address != 0 && func_ptr_address != LLDB_INVALID_ADDRESS) { |
| switch (func_ptr_address_type) { |
| case eAddressTypeInvalid: |
| case eAddressTypeFile: |
| case eAddressTypeHost: |
| break; |
| |
| case eAddressTypeLoad: { |
| ExecutionContext exe_ctx(valobj.GetExecutionContextRef()); |
| |
| Address so_addr; |
| Target *target = exe_ctx.GetTargetPtr(); |
| if (target && !target->GetSectionLoadList().IsEmpty()) { |
| target->GetSectionLoadList().ResolveLoadAddress(func_ptr_address, |
| so_addr); |
| if (so_addr.GetSection() == nullptr) { |
| // If we have an address that doesn't correspond to any symbol, |
| // it might have authentication bits. Strip them & see if it |
| // now points to a symbol -- if so, do the SymbolContext lookup |
| // based on the stripped address. |
| // If we find a symbol with the ptrauth bits stripped, print the |
| // raw value into the stream, and replace the Address with the |
| // one that points to a symbol for a fuller description. |
| if (Process *process = exe_ctx.GetProcessPtr()) { |
| if (ABISP abi_sp = process->GetABI()) { |
| addr_t fixed_addr = abi_sp->FixCodeAddress(func_ptr_address); |
| if (fixed_addr != func_ptr_address) { |
| Address test_address; |
| test_address.SetLoadAddress(fixed_addr, target); |
| if (test_address.GetSection() != nullptr) { |
| int addrsize = target->GetArchitecture().GetAddressByteSize(); |
| sstr.Printf("actual=0x%*.*" PRIx64 " ", addrsize * 2, |
| addrsize * 2, fixed_addr); |
| so_addr = test_address; |
| } |
| } |
| } |
| } |
| } |
| |
| if (so_addr.IsValid()) { |
| so_addr.Dump(&sstr, exe_ctx.GetBestExecutionContextScope(), |
| Address::DumpStyleResolvedDescription, |
| Address::DumpStyleSectionNameOffset); |
| } |
| } |
| } break; |
| } |
| } |
| if (sstr.GetSize() > 0) { |
| if (valobj.GetValueType() == lldb::eValueTypeVTableEntry) |
| stream.PutCString(sstr.GetData()); |
| else |
| stream.Printf("(%s)", sstr.GetData()); |
| return true; |
| } else |
| return false; |
| } |