1dda28197Spatrick //===-- CXXFunctionPointer.cpp---------------------------------------------===//
2061da546Spatrick //
3061da546Spatrick // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4061da546Spatrick // See https://llvm.org/LICENSE.txt for license information.
5061da546Spatrick // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6061da546Spatrick //
7061da546Spatrick //===----------------------------------------------------------------------===//
8061da546Spatrick
9061da546Spatrick #include "lldb/DataFormatters/CXXFunctionPointer.h"
10061da546Spatrick
11061da546Spatrick #include "lldb/Core/ValueObject.h"
12*f6aab3d8Srobert #include "lldb/Target/ABI.h"
13061da546Spatrick #include "lldb/Target/SectionLoadList.h"
14061da546Spatrick #include "lldb/Target/Target.h"
15061da546Spatrick #include "lldb/Utility/Stream.h"
16061da546Spatrick
17061da546Spatrick #include <string>
18061da546Spatrick
19061da546Spatrick using namespace lldb;
20061da546Spatrick using namespace lldb_private;
21061da546Spatrick using namespace lldb_private::formatters;
22061da546Spatrick
CXXFunctionPointerSummaryProvider(ValueObject & valobj,Stream & stream,const TypeSummaryOptions & options)23061da546Spatrick bool lldb_private::formatters::CXXFunctionPointerSummaryProvider(
24061da546Spatrick ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
25061da546Spatrick std::string destination;
26061da546Spatrick StreamString sstr;
27061da546Spatrick AddressType func_ptr_address_type = eAddressTypeInvalid;
28061da546Spatrick addr_t func_ptr_address = valobj.GetPointerValue(&func_ptr_address_type);
29061da546Spatrick if (func_ptr_address != 0 && func_ptr_address != LLDB_INVALID_ADDRESS) {
30061da546Spatrick switch (func_ptr_address_type) {
31061da546Spatrick case eAddressTypeInvalid:
32061da546Spatrick case eAddressTypeFile:
33061da546Spatrick case eAddressTypeHost:
34061da546Spatrick break;
35061da546Spatrick
36061da546Spatrick case eAddressTypeLoad: {
37061da546Spatrick ExecutionContext exe_ctx(valobj.GetExecutionContextRef());
38061da546Spatrick
39061da546Spatrick Address so_addr;
40061da546Spatrick Target *target = exe_ctx.GetTargetPtr();
41061da546Spatrick if (target && !target->GetSectionLoadList().IsEmpty()) {
42*f6aab3d8Srobert target->GetSectionLoadList().ResolveLoadAddress(func_ptr_address,
43*f6aab3d8Srobert so_addr);
44*f6aab3d8Srobert if (so_addr.GetSection() == nullptr) {
45*f6aab3d8Srobert // If we have an address that doesn't correspond to any symbol,
46*f6aab3d8Srobert // it might have authentication bits. Strip them & see if it
47*f6aab3d8Srobert // now points to a symbol -- if so, do the SymbolContext lookup
48*f6aab3d8Srobert // based on the stripped address.
49*f6aab3d8Srobert // If we find a symbol with the ptrauth bits stripped, print the
50*f6aab3d8Srobert // raw value into the stream, and replace the Address with the
51*f6aab3d8Srobert // one that points to a symbol for a fuller description.
52*f6aab3d8Srobert if (Process *process = exe_ctx.GetProcessPtr()) {
53*f6aab3d8Srobert if (ABISP abi_sp = process->GetABI()) {
54*f6aab3d8Srobert addr_t fixed_addr = abi_sp->FixCodeAddress(func_ptr_address);
55*f6aab3d8Srobert if (fixed_addr != func_ptr_address) {
56*f6aab3d8Srobert Address test_address;
57*f6aab3d8Srobert test_address.SetLoadAddress(fixed_addr, target);
58*f6aab3d8Srobert if (test_address.GetSection() != nullptr) {
59*f6aab3d8Srobert int addrsize = target->GetArchitecture().GetAddressByteSize();
60*f6aab3d8Srobert sstr.Printf("actual=0x%*.*" PRIx64 " ", addrsize * 2,
61*f6aab3d8Srobert addrsize * 2, fixed_addr);
62*f6aab3d8Srobert so_addr = test_address;
63*f6aab3d8Srobert }
64*f6aab3d8Srobert }
65*f6aab3d8Srobert }
66*f6aab3d8Srobert }
67*f6aab3d8Srobert }
68*f6aab3d8Srobert
69*f6aab3d8Srobert if (so_addr.IsValid()) {
70061da546Spatrick so_addr.Dump(&sstr, exe_ctx.GetBestExecutionContextScope(),
71061da546Spatrick Address::DumpStyleResolvedDescription,
72061da546Spatrick Address::DumpStyleSectionNameOffset);
73061da546Spatrick }
74061da546Spatrick }
75061da546Spatrick } break;
76061da546Spatrick }
77061da546Spatrick }
78061da546Spatrick if (sstr.GetSize() > 0) {
79061da546Spatrick stream.Printf("(%s)", sstr.GetData());
80061da546Spatrick return true;
81061da546Spatrick } else
82061da546Spatrick return false;
83061da546Spatrick }
84