mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 16:52:43 +00:00
6f6a2dc319
This fixes a bug where we previously would hang if we couldn't find a library containing the current program counter.
71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
/*
|
|
* Copyright (c) 2020, Itamar S. <itamar8910@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include "BacktraceModel.h"
|
|
#include "Debugger.h"
|
|
#include <LibDebug/StackFrameUtils.h>
|
|
|
|
namespace HackStudio {
|
|
|
|
NonnullRefPtr<BacktraceModel> BacktraceModel::create(Debug::ProcessInspector const& inspector, PtraceRegisters const& regs)
|
|
{
|
|
return adopt_ref(*new BacktraceModel(create_backtrace(inspector, regs)));
|
|
}
|
|
|
|
GUI::Variant BacktraceModel::data(const GUI::ModelIndex& index, GUI::ModelRole role) const
|
|
{
|
|
if (role == GUI::ModelRole::Display) {
|
|
auto& frame = m_frames.at(index.row());
|
|
return frame.function_name;
|
|
}
|
|
return {};
|
|
}
|
|
|
|
GUI::ModelIndex BacktraceModel::index(int row, int column, const GUI::ModelIndex&) const
|
|
{
|
|
if (row < 0 || row >= static_cast<int>(m_frames.size()))
|
|
return {};
|
|
return create_index(row, column, &m_frames.at(row));
|
|
}
|
|
|
|
Vector<BacktraceModel::FrameInfo> BacktraceModel::create_backtrace(Debug::ProcessInspector const& inspector, PtraceRegisters const& regs)
|
|
{
|
|
FlatPtr current_frame_pointer = regs.bp();
|
|
FlatPtr current_program_counter = regs.ip();
|
|
Vector<BacktraceModel::FrameInfo> frames;
|
|
size_t frame_index = 0;
|
|
do {
|
|
auto lib = inspector.library_at(current_program_counter);
|
|
|
|
if (lib) {
|
|
// After the first frame, current_instruction holds the return address from the function call.
|
|
// We need to go back to the 'call' instruction to get accurate source position information.
|
|
if (frame_index > 0)
|
|
--current_program_counter;
|
|
ByteString name = lib->debug_info->elf().symbolicate(current_program_counter - lib->base_address);
|
|
if (name.is_empty()) {
|
|
dbgln("BacktraceModel: couldn't find containing function for address: {:p} (library={})", current_program_counter, lib->name);
|
|
name = "<missing>";
|
|
}
|
|
|
|
auto source_position = lib->debug_info->get_source_position(current_program_counter - lib->base_address);
|
|
|
|
frames.append({ name, current_program_counter, current_frame_pointer, source_position });
|
|
} else {
|
|
dbgln("BacktraceModel: couldn't find containing library for address: {:p}", current_program_counter);
|
|
frames.append({ "<missing>", current_program_counter, current_frame_pointer, {} });
|
|
}
|
|
|
|
auto frame_info = Debug::StackFrameUtils::get_info(inspector, current_frame_pointer);
|
|
VERIFY(frame_info.has_value());
|
|
current_program_counter = frame_info.value().return_address;
|
|
current_frame_pointer = frame_info.value().next_ebp;
|
|
++frame_index;
|
|
} while (current_frame_pointer && current_program_counter);
|
|
return frames;
|
|
}
|
|
|
|
}
|