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ProfileViewer: Add a timeline widget for a visual view of the profile

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Userspace stack frames are in blue, kernel stack frames in red :^)
This commit is contained in:
Andreas Kling 2019-12-14 18:44:29 +01:00
parent 46a57c7f59
commit a3e7c99ffe
6 changed files with 121 additions and 16 deletions
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53
DevTools/ProfileViewer/ProfileTimelineWidget.cpp Normal file
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#include "ProfileTimelineWidget.h"
#include "Profile.h"
#include <LibGUI/GPainter.h>
ProfileTimelineWidget::ProfileTimelineWidget(Profile& profile, GWidget* parent)
: GFrame(parent)
, m_profile(profile)
{
set_frame_thickness(2);
set_frame_shadow(FrameShadow::Sunken);
set_frame_shape(FrameShape::Container);
set_background_color(Color::White);
set_fill_with_background_color(true);
set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
set_preferred_size(0, 80);
}
ProfileTimelineWidget::~ProfileTimelineWidget()
{
}
void ProfileTimelineWidget::paint_event(GPaintEvent& event)
{
GFrame::paint_event(event);
GPainter painter(*this);
painter.add_clip_rect(event.rect());
float column_width = (float)frame_inner_rect().width() / (float)m_profile.length_in_ms();
m_profile.for_each_sample([&](const JsonObject& sample) {
u64 t = sample.get("timestamp").to_number<u64>() - m_profile.first_timestamp();
int x = (int)((float)t * column_width);
int cw = max(1, (int)column_width);
bool in_kernel = sample.get("frames").as_array().at(1).as_object().get("address").to_number<u32>() < (8 * MB);
Color color = in_kernel ? Color::from_rgb(0xc25e5a) : Color::from_rgb(0x5a65c2);
for (int i = 0; i < cw; ++i)
painter.draw_line({ x + i, frame_thickness() }, { x + i, height() - frame_thickness() * 2 }, color);
});
}
void ProfileTimelineWidget::mousedown_event(GMouseEvent&)
{
}
void ProfileTimelineWidget::mousemove_event(GMouseEvent&)
{
}
void ProfileTimelineWidget::mouseup_event(GMouseEvent&)
{
}