mirror of
https://github.com/RGBCube/serenity
synced 2025-05-14 11:04:59 +00:00
6e19ab2bbc
We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
67 lines
2.4 KiB
C++
67 lines
2.4 KiB
C++
/*
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* Copyright (c) 2020, 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 "BacktraceModel.h"
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#include "Debugger.h"
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#include <LibDebug/StackFrameUtils.h>
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namespace HackStudio {
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NonnullRefPtr<BacktraceModel> BacktraceModel::create(Debug::ProcessInspector const& inspector, PtraceRegisters const& regs)
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{
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return adopt_ref(*new BacktraceModel(create_backtrace(inspector, regs)));
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}
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GUI::Variant BacktraceModel::data(const GUI::ModelIndex& index, GUI::ModelRole role) const
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{
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if (role == GUI::ModelRole::Display) {
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auto& frame = m_frames.at(index.row());
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return frame.function_name;
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}
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return {};
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}
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GUI::ModelIndex BacktraceModel::index(int row, int column, const GUI::ModelIndex&) const
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{
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if (row < 0 || row >= static_cast<int>(m_frames.size()))
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return {};
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return create_index(row, column, &m_frames.at(row));
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}
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Vector<BacktraceModel::FrameInfo> BacktraceModel::create_backtrace(Debug::ProcessInspector const& inspector, PtraceRegisters const& regs)
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{
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FlatPtr current_ebp = regs.bp();
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FlatPtr current_instruction = regs.ip();
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Vector<BacktraceModel::FrameInfo> frames;
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size_t frame_index = 0;
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do {
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auto lib = inspector.library_at(current_instruction);
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if (!lib)
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continue;
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// After the first frame, current_instruction holds the return address from the function call.
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// We need to go back to the 'call' instruction to get accurate source position information.
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if (frame_index > 0)
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--current_instruction;
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DeprecatedString name = lib->debug_info->elf().symbolicate(current_instruction - lib->base_address);
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if (name.is_null()) {
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dbgln("BacktraceModel: couldn't find containing function for address: {:p} (library={})", current_instruction, lib->name);
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name = "<missing>";
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}
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auto source_position = lib->debug_info->get_source_position(current_instruction - lib->base_address);
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frames.append({ name, current_instruction, current_ebp, source_position });
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auto frame_info = Debug::StackFrameUtils::get_info(inspector, current_ebp);
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VERIFY(frame_info.has_value());
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current_instruction = frame_info.value().return_address;
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current_ebp = frame_info.value().next_ebp;
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++frame_index;
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} while (current_ebp && current_instruction);
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return frames;
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}
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}
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