Profiler: Add a new "Samples" view to the main UI

You can now view the individual samples in a profile one by one with the new "Samples" view. The "old" main view moves into a "Call Tree" tab (but it remains the default view.) When you select a sample in the samples view, we show you the full symbolicated backtrace in a separate view on the right hand side. :^)
2025-10-31 13:32:45 +00:00 · 2021-02-27 18:33:30 +01:00 · 2021-02-27 18:33:30 +01:00 · 1fb1279cfd
commit 1fb1279cfd
parent 2c1f71055f
8 changed files with 369 additions and 11 deletions
--- a/Userland/DevTools/Profiler/SamplesModel.cpp
+++ b/Userland/DevTools/Profiler/SamplesModel.cpp
@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2018-2021, 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 "SamplesModel.h"
+#include "Profile.h"
+#include <AK/StringBuilder.h>
+#include <stdio.h>
+
+SamplesModel::SamplesModel(Profile& profile)
+    : m_profile(profile)
+{
+    m_user_frame_icon.set_bitmap_for_size(16, Gfx::Bitmap::load_from_file("/res/icons/16x16/inspector-object.png"));
+    m_kernel_frame_icon.set_bitmap_for_size(16, Gfx::Bitmap::load_from_file("/res/icons/16x16/inspector-object-red.png"));
+}
+
+SamplesModel::~SamplesModel()
+{
+}
+
+int SamplesModel::row_count(const GUI::ModelIndex&) const
+{
+    return m_profile.filtered_event_count();
+}
+
+int SamplesModel::column_count(const GUI::ModelIndex&) const
+{
+    return Column::__Count;
+}
+
+String SamplesModel::column_name(int column) const
+{
+    switch (column) {
+    case Column::SampleIndex:
+        return "#";
+    case Column::Timestamp:
+        return "Timestamp";
+    case Column::InnermostStackFrame:
+        return "Innermost Frame";
+    default:
+        VERIFY_NOT_REACHED();
+    }
+}
+
+GUI::Variant SamplesModel::data(const GUI::ModelIndex& index, GUI::ModelRole role) const
+{
+    u32 event_index = m_profile.first_filtered_event_index() + index.row();
+    auto& event = m_profile.events().at(event_index);
+
+    if (role == GUI::ModelRole::Custom) {
+        return event_index;
+    }
+
+    if (role == GUI::ModelRole::Display) {
+        if (index.column() == Column::SampleIndex)
+            return event_index;
+
+        if (index.column() == Column::Timestamp) {
+            return (u32)event.timestamp;
+        }
+
+        if (index.column() == Column::InnermostStackFrame) {
+            return event.frames.last().symbol;
+        }
+        return {};
+    }
+    return {};
+}
+
+void SamplesModel::update()
+{
+    did_update(Model::InvalidateAllIndexes);
+}