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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "DisassemblyModel.h"
#include "Profile.h"
#include <AK/MappedFile.h>
#include <LibELF/Image.h>
#include <LibGUI/Painter.h>
#include <LibX86/Disassembler.h>
#include <LibX86/ELFSymbolProvider.h>
#include <ctype.h>
#include <stdio.h>
namespace Profiler {
static const Gfx::Bitmap& heat_gradient()
{
static RefPtr<Gfx::Bitmap> bitmap;
if (!bitmap) {
bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::BGRx8888, { 101, 1 });
GUI::Painter painter(*bitmap);
painter.fill_rect_with_gradient(Orientation::Horizontal, bitmap->rect(), Color::from_rgb(0xffc080), Color::from_rgb(0xff3000));
}
return *bitmap;
}
static Color color_for_percent(int percent)
{
VERIFY(percent >= 0 && percent <= 100);
return heat_gradient().get_pixel(percent, 0);
}
DisassemblyModel::DisassemblyModel(Profile& profile, ProfileNode& node)
: m_profile(profile)
, m_node(node)
{
OwnPtr<ELF::Image> kernel_elf;
const ELF::Image* elf;
FlatPtr base_address = 0;
if (m_node.address() >= 0xc0000000) {
if (!m_kernel_file) {
auto file_or_error = MappedFile::map("/boot/Kernel.debug");
if (file_or_error.is_error())
return;
m_kernel_file = file_or_error.release_value();
}
kernel_elf = make<ELF::Image>((const u8*)m_kernel_file->data(), m_kernel_file->size());
elf = kernel_elf.ptr();
} else {
auto& process = node.process();
auto library_data = process.library_metadata.library_containing(node.address());
if (!library_data) {
dbgln("no library data for address {:p}", node.address());
return;
}
elf = &library_data->object->elf;
base_address = library_data->base;
}
VERIFY(elf != nullptr);
auto symbol = elf->find_symbol(node.address() - base_address);
if (!symbol.has_value()) {
dbgln("DisassemblyModel: symbol not found");
return;
}
VERIFY(symbol.has_value());
auto view = symbol.value().raw_data();
X86::ELFSymbolProvider symbol_provider(*elf);
X86::SimpleInstructionStream stream((const u8*)view.characters_without_null_termination(), view.length());
X86::Disassembler disassembler(stream);
size_t offset_into_symbol = 0;
for (;;) {
auto insn = disassembler.next();
if (!insn.has_value())
break;
FlatPtr address_in_profiled_program = base_address + symbol.value().value() + offset_into_symbol;
auto disassembly = insn.value().to_string(address_in_profiled_program, &symbol_provider);
StringView instruction_bytes = view.substring_view(offset_into_symbol, insn.value().length());
u32 samples_at_this_instruction = m_node.events_per_address().get(address_in_profiled_program).value_or(0);
float percent = ((float)samples_at_this_instruction / (float)m_node.event_count()) * 100.0f;
m_instructions.append({ insn.value(), disassembly, instruction_bytes, address_in_profiled_program, samples_at_this_instruction, percent });
offset_into_symbol += insn.value().length();
}
}
DisassemblyModel::~DisassemblyModel()
{
}
int DisassemblyModel::row_count(const GUI::ModelIndex&) const
{
return m_instructions.size();
}
String DisassemblyModel::column_name(int column) const
{
switch (column) {
case Column::SampleCount:
return m_profile.show_percentages() ? "% Samples" : "# Samples";
case Column::Address:
return "Address";
case Column::InstructionBytes:
return "Insn Bytes";
case Column::Disassembly:
return "Disassembly";
default:
VERIFY_NOT_REACHED();
return {};
}
}
struct ColorPair {
Color background;
Color foreground;
};
static Optional<ColorPair> color_pair_for(const InstructionData& insn)
{
if (insn.percent == 0)
return {};
Color background = color_for_percent(insn.percent);
Color foreground;
if (insn.percent > 50)
foreground = Color::White;
else
foreground = Color::Black;
return ColorPair { background, foreground };
}
GUI::Variant DisassemblyModel::data(const GUI::ModelIndex& index, GUI::ModelRole role) const
{
auto& insn = m_instructions[index.row()];
if (role == GUI::ModelRole::BackgroundColor) {
auto colors = color_pair_for(insn);
if (!colors.has_value())
return {};
return colors.value().background;
}
if (role == GUI::ModelRole::ForegroundColor) {
auto colors = color_pair_for(insn);
if (!colors.has_value())
return {};
return colors.value().foreground;
}
if (role == GUI::ModelRole::Display) {
if (index.column() == Column::SampleCount) {
if (m_profile.show_percentages())
return ((float)insn.event_count / (float)m_node.event_count()) * 100.0f;
return insn.event_count;
}
if (index.column() == Column::Address)
return String::formatted("{:p}", insn.address);
if (index.column() == Column::InstructionBytes) {
StringBuilder builder;
for (auto ch : insn.bytes) {
builder.appendff("{:02x} ", (u8)ch);
}
return builder.to_string();
}
if (index.column() == Column::Disassembly)
return insn.disassembly;
return {};
}
return {};
}
void DisassemblyModel::update()
{
did_update();
}
}
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