mirror of
https://github.com/SerenityOS/serenity.git
synced 2025-01-23 18:02:05 -05:00
99 lines
3 KiB
C++
99 lines
3 KiB
C++
#include "Profile.h"
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#include "ProfileModel.h"
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#include <AK/QuickSort.h>
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#include <LibCore/CFile.h>
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#include <stdio.h>
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Profile::Profile(const JsonArray& json, Vector<NonnullRefPtr<ProfileNode>>&& roots, u64 first_timestamp, u64 last_timestamp)
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: m_json(json)
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, m_roots(move(roots))
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, m_first_timestamp(first_timestamp)
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, m_last_timestamp(last_timestamp)
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{
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m_model = ProfileModel::create(*this);
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}
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Profile::~Profile()
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{
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}
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GModel& Profile::model()
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{
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return *m_model;
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}
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OwnPtr<Profile> Profile::load_from_file(const StringView& path)
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{
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auto file = CFile::construct(path);
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if (!file->open(CIODevice::ReadOnly)) {
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fprintf(stderr, "Unable to open %s, error: %s\n", String(path).characters(), file->error_string());
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return nullptr;
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}
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auto json = JsonValue::from_string(file->read_all());
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if (!json.is_array()) {
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fprintf(stderr, "Invalid format (not a JSON array)\n");
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return nullptr;
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}
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auto& samples = json.as_array();
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if (samples.is_empty())
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return nullptr;
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NonnullRefPtrVector<ProfileNode> roots;
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auto find_or_create_root = [&roots](const String& symbol, u32 address, u32 offset, u64 timestamp) -> ProfileNode& {
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for (int i = 0; i < roots.size(); ++i) {
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auto& root = roots[i];
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if (root.symbol() == symbol) {
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return root;
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}
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}
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auto new_root = ProfileNode::create(symbol, address, offset, timestamp);
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roots.append(new_root);
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return new_root;
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};
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u64 first_timestamp = samples.at(0).as_object().get("timestamp").to_number<u64>();
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u64 last_timestamp = samples.at(samples.size() - 1).as_object().get("timestamp").to_number<u64>();
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samples.for_each([&](const JsonValue& sample) {
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auto frames_value = sample.as_object().get("frames");
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auto& frames = frames_value.as_array();
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ProfileNode* node = nullptr;
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for (int i = frames.size() - 1; i >= 0; --i) {
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auto& frame = frames.at(i);
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auto symbol = frame.as_object().get("symbol").as_string_or({});
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auto address = frame.as_object().get("address").as_u32();
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auto offset = frame.as_object().get("offset").as_u32();
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auto timestamp = frame.as_object().get("timestamp").to_number<u64>();
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if (symbol.is_empty())
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break;
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if (!node)
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node = &find_or_create_root(symbol, address, offset, timestamp);
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else
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node = &node->find_or_create_child(symbol, address, offset, timestamp);
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node->increment_sample_count();
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}
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});
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for (auto& root : roots) {
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root.sort_children();
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}
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return NonnullOwnPtr<Profile>(NonnullOwnPtr<Profile>::Adopt, *new Profile(move(samples), move(roots), first_timestamp, last_timestamp));
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}
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void ProfileNode::sort_children()
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{
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quick_sort(m_children.begin(), m_children.end(), [](auto& a, auto& b) {
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return a->sample_count() >= b->sample_count();
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});
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for (auto& child : m_children)
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child->sort_children();
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}
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