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ProcessInspector is an abstract base class for an object that can inspect the address space of a process. Concrete sub classes need to implement methods for peeking & poking memory and walking the loaded libraries. It is currently only implemented by DebugSession.
63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
/*
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* Copyright (c) 2021, Itamar S. <itamar8910@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "ProcessInspector.h"
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#include "DebugInfo.h"
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namespace Debug {
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const LoadedLibrary* ProcessInspector::library_at(FlatPtr address) const
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{
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const LoadedLibrary* result = nullptr;
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for_each_loaded_library([&result, address](const auto& lib) {
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if (address >= lib.base_address && address < lib.base_address + lib.debug_info->elf().size()) {
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result = &lib;
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return IterationDecision::Break;
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}
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return IterationDecision::Continue;
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});
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return result;
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}
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Optional<ProcessInspector::SymbolicationResult> ProcessInspector::symbolicate(FlatPtr address) const
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{
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auto* lib = library_at(address);
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if (!lib)
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return {};
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// FIXME: ELF::Image symlicate() API should return String::empty() if symbol is not found (It currently returns ??)
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auto symbol = lib->debug_info->elf().symbolicate(address - lib->base_address);
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return { { lib->name, symbol } };
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}
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Optional<DebugInfo::SourcePositionAndAddress> ProcessInspector::get_address_from_source_position(String const& file, size_t line) const
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{
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Optional<DebugInfo::SourcePositionAndAddress> result;
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for_each_loaded_library([file, line, &result](auto& lib) {
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// The loader contains its own definitions for LibC symbols, so we don't want to include it in the search.
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if (lib.name == "Loader.so")
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return IterationDecision::Continue;
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auto source_position_and_address = lib.debug_info->get_address_from_source_position(file, line);
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if (!source_position_and_address.has_value())
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return IterationDecision::Continue;
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result = source_position_and_address;
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result.value().address += lib.base_address;
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return IterationDecision::Break;
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});
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return result;
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}
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Optional<DebugInfo::SourcePosition> ProcessInspector::get_source_position(FlatPtr address) const
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{
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auto* lib = library_at(address);
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if (!lib)
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return {};
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return lib->debug_info->get_source_position(address - lib->base_address);
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}
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}
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