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//===-- 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/Core/ValueObject.h"
#include "lldb/Target/ABI.h"
#include "lldb/Target/SectionLoadList.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/Stream.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) {
stream.Printf("(%s)", sstr.GetData());
return true;
} else
return false;
}
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