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serenity/Userland/DevTools/Profiler/DisassemblyModel.cpp
Andreas Kling e0f32626bc LibGfx: Rename 32-bit BitmapFormats to BGRA8888 and BGRx888x
The previous names (RGBA32 and RGB32) were misleading since that's not
the actual byte order in memory. The new names reflect exactly how the
color values get laid out in bitmap data.
2021-03-16 11:50:03 +01:00

203 lines
6.7 KiB
C++

/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#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>
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");
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 {
// FIXME: This is kinda rickety looking with all the -> -> ->
auto library_data = node.process(profile)->library_metadata->library_containing(node.address());
if (!library_data) {
dbgln("no library data");
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());
size_t 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();
}