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SystemMonitor: Display the stack of only the selected thread

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This uses the new ProcFS interface at /proc/<pid>/stacks/<tid>
This commit is contained in:
Ben Wiederhake 2020-08-09 20:19:28 +02:00 • committed by Andreas Kling
parent c3df2fe83f
commit dbbdb39c1f
4 changed files with 33 additions and 30 deletions
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67
Applications/SystemMonitor/ProcessStacksWidget.cpp
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@ -1,67 +0,0 @@
/*
* Copyright (c) 2018-2020, 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 "ProcessStacksWidget.h"
#include <AK/ByteBuffer.h>
#include <LibCore/File.h>
#include <LibCore/Timer.h>
#include <LibGUI/BoxLayout.h>
ProcessStacksWidget::ProcessStacksWidget()
{
set_layout<GUI::VerticalBoxLayout>();
layout()->set_margins({ 4, 4, 4, 4 });
m_stacks_editor = add<GUI::TextEditor>();
m_stacks_editor->set_mode(GUI::TextEditor::ReadOnly);
m_timer = add<Core::Timer>(1000, [this] { refresh(); });
}
ProcessStacksWidget::~ProcessStacksWidget()
{
}
void ProcessStacksWidget::set_pid(pid_t pid)
{
if (m_pid == pid)
return;
m_pid = pid;
refresh();
}
void ProcessStacksWidget::refresh()
{
auto file = Core::File::construct(String::format("/proc/%d/stack", m_pid));
if (!file->open(Core::IODevice::ReadOnly)) {
m_stacks_editor->set_text(String::format("Unable to open %s", file->filename().characters()));
return;
}
auto new_text = file->read_all();
if (m_stacks_editor->text() != new_text) {
m_stacks_editor->set_text(new_text);
}
}