forked from OSchip/llvm-project
84 lines
3.2 KiB
C++
84 lines
3.2 KiB
C++
//===-- CXXFunctionPointer.cpp---------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/DataFormatters/CXXFunctionPointer.h"
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#include "lldb/Core/ValueObject.h"
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#include "lldb/Target/ABI.h"
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#include "lldb/Target/SectionLoadList.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Utility/Stream.h"
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#include <string>
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::formatters;
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bool lldb_private::formatters::CXXFunctionPointerSummaryProvider(
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ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
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std::string destination;
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StreamString sstr;
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AddressType func_ptr_address_type = eAddressTypeInvalid;
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addr_t func_ptr_address = valobj.GetPointerValue(&func_ptr_address_type);
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if (func_ptr_address != 0 && func_ptr_address != LLDB_INVALID_ADDRESS) {
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switch (func_ptr_address_type) {
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case eAddressTypeInvalid:
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case eAddressTypeFile:
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case eAddressTypeHost:
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break;
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case eAddressTypeLoad: {
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ExecutionContext exe_ctx(valobj.GetExecutionContextRef());
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Address so_addr;
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Target *target = exe_ctx.GetTargetPtr();
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if (target && !target->GetSectionLoadList().IsEmpty()) {
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target->GetSectionLoadList().ResolveLoadAddress(func_ptr_address,
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so_addr);
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if (so_addr.GetSection() == nullptr) {
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// If we have an address that doesn't correspond to any symbol,
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// it might have authentication bits. Strip them & see if it
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// now points to a symbol -- if so, do the SymbolContext lookup
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// based on the stripped address.
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// If we find a symbol with the ptrauth bits stripped, print the
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// raw value into the stream, and replace the Address with the
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// one that points to a symbol for a fuller description.
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if (Process *process = exe_ctx.GetProcessPtr()) {
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if (ABISP abi_sp = process->GetABI()) {
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addr_t fixed_addr = abi_sp->FixCodeAddress(func_ptr_address);
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if (fixed_addr != func_ptr_address) {
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Address test_address;
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test_address.SetLoadAddress(fixed_addr, target);
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if (test_address.GetSection() != nullptr) {
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int addrsize = target->GetArchitecture().GetAddressByteSize();
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sstr.Printf("actual=0x%*.*" PRIx64 " ", addrsize * 2,
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addrsize * 2, fixed_addr);
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so_addr = test_address;
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}
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}
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}
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}
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}
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if (so_addr.IsValid()) {
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so_addr.Dump(&sstr, exe_ctx.GetBestExecutionContextScope(),
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Address::DumpStyleResolvedDescription,
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Address::DumpStyleSectionNameOffset);
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}
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}
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} break;
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}
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}
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if (sstr.GetSize() > 0) {
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stream.Printf("(%s)", sstr.GetData());
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return true;
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} else
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return false;
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}
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