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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "ProcessMemoryMapWidget.h"
28#include <LibCore/Timer.h>
29#include <LibGUI/BoxLayout.h>
30#include <LibGUI/JsonArrayModel.h>
31#include <LibGUI/Painter.h>
32#include <LibGUI/SortingProxyModel.h>
33#include <LibGUI/TableView.h>
34#include <LibGfx/Palette.h>
35
36class PagemapPaintingDelegate final : public GUI::TableCellPaintingDelegate {
37public:
38 virtual ~PagemapPaintingDelegate() override {}
39
40 virtual void paint(GUI::Painter& painter, const Gfx::Rect& a_rect, const Gfx::Palette&, const GUI::Model& model, const GUI::ModelIndex& index) override
41 {
42 auto rect = a_rect.shrunken(2, 2);
43 auto pagemap = model.data(index, GUI::Model::Role::Custom).to_string();
44
45 float scale_factor = (float)pagemap.length() / (float)rect.width();
46
47 for (int i = 0; i < rect.width(); ++i) {
48 int x = rect.x() + i;
49 char c = pagemap[(float)i * scale_factor];
50 Color color;
51 if (c == 'N') // Null (no page at all, typically an inode-backed page that hasn't been paged in.)
52 color = Color::White;
53 else if (c == 'Z') // Zero (globally shared zero page, typically an untouched anonymous page.)
54 color = Color::from_rgb(0xc0c0ff);
55 else if (c == 'P') // Physical (a resident page)
56 color = Color::Black;
57 else
58 ASSERT_NOT_REACHED();
59
60 painter.draw_line({ x, rect.top() }, { x, rect.bottom() }, color);
61 }
62
63 painter.draw_rect(rect, Color::Black);
64 }
65};
66
67ProcessMemoryMapWidget::ProcessMemoryMapWidget()
68{
69 set_layout<GUI::VerticalBoxLayout>();
70 layout()->set_margins({ 4, 4, 4, 4 });
71 m_table_view = add<GUI::TableView>();
72 m_table_view->set_size_columns_to_fit_content(true);
73 Vector<GUI::JsonArrayModel::FieldSpec> pid_vm_fields;
74 pid_vm_fields.empend("Address", Gfx::TextAlignment::CenterLeft, [](auto& object) {
75 return String::format("%#x", object.get("address").to_u32());
76 });
77 pid_vm_fields.empend("size", "Size", Gfx::TextAlignment::CenterRight);
78 pid_vm_fields.empend("amount_resident", "Resident", Gfx::TextAlignment::CenterRight);
79 pid_vm_fields.empend("amount_dirty", "Dirty", Gfx::TextAlignment::CenterRight);
80 pid_vm_fields.empend("Access", Gfx::TextAlignment::CenterLeft, [](auto& object) {
81 StringBuilder builder;
82 if (!object.get("user_accessible").to_bool())
83 builder.append('K');
84 if (object.get("readable").to_bool())
85 builder.append('R');
86 if (object.get("writable").to_bool())
87 builder.append('W');
88 if (object.get("executable").to_bool())
89 builder.append('X');
90 if (object.get("shared").to_bool())
91 builder.append('S');
92 if (object.get("stack").to_bool())
93 builder.append('T');
94 return builder.to_string();
95 });
96 pid_vm_fields.empend("vmobject", "VMObject type", Gfx::TextAlignment::CenterLeft);
97 pid_vm_fields.empend("Purgeable", Gfx::TextAlignment::CenterLeft, [](auto& object) {
98 if (!object.get("purgeable").to_bool())
99 return "";
100 if (object.get("volatile").to_bool())
101 return "Volatile";
102 return "Non-volatile";
103 });
104 pid_vm_fields.empend(
105 "Page map", Gfx::TextAlignment::CenterLeft,
106 [](auto&) {
107 return GUI::Variant();
108 },
109 [](auto&) {
110 return GUI::Variant();
111 },
112 [](const JsonObject& object) {
113 auto pagemap = object.get("pagemap").as_string_or({});
114 return pagemap;
115 });
116 pid_vm_fields.empend("cow_pages", "# CoW", Gfx::TextAlignment::CenterRight);
117 pid_vm_fields.empend("name", "Name", Gfx::TextAlignment::CenterLeft);
118 m_json_model = GUI::JsonArrayModel::create({}, move(pid_vm_fields));
119 m_table_view->set_model(GUI::SortingProxyModel::create(*m_json_model));
120
121 m_table_view->set_cell_painting_delegate(7, make<PagemapPaintingDelegate>());
122
123 m_table_view->model()->set_key_column_and_sort_order(0, GUI::SortOrder::Ascending);
124 m_timer = add<Core::Timer>(1000, [this] { refresh(); });
125}
126
127ProcessMemoryMapWidget::~ProcessMemoryMapWidget()
128{
129}
130
131void ProcessMemoryMapWidget::set_pid(pid_t pid)
132{
133 if (m_pid == pid)
134 return;
135 m_pid = pid;
136 m_json_model->set_json_path(String::format("/proc/%d/vm", pid));
137}
138
139void ProcessMemoryMapWidget::refresh()
140{
141 if (m_pid != -1)
142 m_json_model->update();
143}