b91c49364d
This makes it more symmetrical with adopt_own() (which is used to create a NonnullOwnPtr from the result of a naked new.)
58 lines
1.9 KiB
C++
58 lines
1.9 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(const Debug::DebugSession& debug_session, const PtraceRegisters& regs)
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{
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return adopt_ref(*new BacktraceModel(create_backtrace(debug_session, 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(const Debug::DebugSession& debug_session, const PtraceRegisters& regs)
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{
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u32 current_ebp = regs.ebp;
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u32 current_instruction = regs.eip;
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Vector<BacktraceModel::FrameInfo> frames;
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do {
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auto lib = debug_session.library_at(regs.eip);
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if (!lib)
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continue;
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String name = lib->debug_info->name_of_containing_function(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}", current_instruction);
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name = "<missing>";
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}
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frames.append({ name, current_instruction, current_ebp });
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auto frame_info = Debug::StackFrameUtils::get_info(*Debugger::the().session(), 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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} while (current_ebp && current_instruction);
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return frames;
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}
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}
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