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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "ProcessMemoryMapWidget.h"
#include <LibCore/Timer.h>
#include <LibGUI/BoxLayout.h>
#include <LibGUI/JsonArrayModel.h>
#include <LibGUI/Painter.h>
#include <LibGUI/SortingProxyModel.h>
#include <LibGUI/TableView.h>
#include <LibGfx/Palette.h>
REGISTER_WIDGET(SystemMonitor, ProcessMemoryMapWidget)
namespace SystemMonitor {
class PagemapPaintingDelegate final : public GUI::TableCellPaintingDelegate {
public:
virtual ~PagemapPaintingDelegate() override = default;
virtual void paint(GUI::Painter& painter, Gfx::IntRect const& a_rect, Gfx::Palette const&, const GUI::ModelIndex& index) override
{
auto rect = a_rect.shrunken(2, 2);
auto pagemap = index.data(GUI::ModelRole::Custom).to_string();
float scale_factor = (float)pagemap.length() / (float)rect.width();
for (int i = 0; i < rect.width(); ++i) {
int x = rect.x() + i;
char c = pagemap[(float)i * scale_factor];
Color color;
if (c == 'N') // Null (no page at all, typically an inode-backed page that hasn't been paged in.)
color = Color::White;
else if (c == 'Z') // Zero (globally shared zero page, typically an untouched anonymous page.)
color = Color::from_rgb(0xc0c0ff);
else if (c == 'P') // Physical (a resident page)
color = Color::Black;
else
VERIFY_NOT_REACHED();
painter.draw_line({ x, rect.top() }, { x, rect.bottom() }, color);
}
painter.draw_rect(rect, Color::Black);
}
};
ProcessMemoryMapWidget::ProcessMemoryMapWidget()
{
set_layout<GUI::VerticalBoxLayout>();
layout()->set_margins(4);
m_table_view = add<GUI::TableView>();
Vector<GUI::JsonArrayModel::FieldSpec> pid_vm_fields;
pid_vm_fields.empend(
"Address", Gfx::TextAlignment::CenterLeft,
[](auto& object) { return String::formatted("{:p}", object.get("address").to_u64()); },
[](auto& object) { return object.get("address").to_u64(); });
pid_vm_fields.empend("size", "Size", Gfx::TextAlignment::CenterRight);
pid_vm_fields.empend("amount_resident", "Resident", Gfx::TextAlignment::CenterRight);
pid_vm_fields.empend("amount_dirty", "Dirty", Gfx::TextAlignment::CenterRight);
pid_vm_fields.empend("Access", Gfx::TextAlignment::CenterLeft, [](auto& object) {
StringBuilder builder;
if (object.get("readable").to_bool())
builder.append('R');
if (object.get("writable").to_bool())
builder.append('W');
if (object.get("executable").to_bool())
builder.append('X');
if (object.get("shared").to_bool())
builder.append('S');
if (object.get("syscall").to_bool())
builder.append('C');
if (object.get("stack").to_bool())
builder.append('T');
return builder.to_string();
});
pid_vm_fields.empend("VMObject type", Gfx::TextAlignment::CenterLeft, [](auto& object) {
auto type = object.get("vmobject").to_string();
if (type.ends_with("VMObject"))
type = type.substring(0, type.length() - 8);
return type;
});
pid_vm_fields.empend("Purgeable", Gfx::TextAlignment::CenterLeft, [](auto& object) {
if (object.get("volatile").to_bool())
return "Volatile";
return "Non-volatile";
});
pid_vm_fields.empend(
"Page map", Gfx::TextAlignment::CenterLeft,
[](auto&) {
return GUI::Variant();
},
[](auto&) {
return GUI::Variant(0);
},
[](JsonObject const& object) {
auto pagemap = object.get("pagemap").as_string_or({});
return pagemap;
});
pid_vm_fields.empend("cow_pages", "# CoW", Gfx::TextAlignment::CenterRight);
pid_vm_fields.empend("name", "Name", Gfx::TextAlignment::CenterLeft);
m_json_model = GUI::JsonArrayModel::create({}, move(pid_vm_fields));
m_table_view->set_model(MUST(GUI::SortingProxyModel::create(*m_json_model)));
m_table_view->set_column_painting_delegate(7, make<PagemapPaintingDelegate>());
m_table_view->set_key_column_and_sort_order(0, GUI::SortOrder::Ascending);
m_timer = add<Core::Timer>(1000, [this] { refresh(); });
}
void ProcessMemoryMapWidget::set_pid(pid_t pid)
{
if (m_pid == pid)
return;
m_pid = pid;
m_json_model->set_json_path(String::formatted("/proc/{}/vm", pid));
}
void ProcessMemoryMapWidget::refresh()
{
if (m_pid != -1)
m_json_model->invalidate();
}
}
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