================
@@ -174,6 +177,82 @@ struct StatisticsOptions {
std::optional<bool> m_include_transcript;
};
+/// A class that represents statistics about a TypeSummaryProviders invocations
+class SummaryStatistics {
+public:
+ explicit SummaryStatistics(std::string name,
+ std::string impl_type)
+ : m_total_time(), m_impl_type(impl_type), m_name(name),
+ m_summary_count(0) {}
+
+ std::string GetName() const { return m_name; };
+ double GetTotalTime() const { return m_total_time.get().count(); }
+
+ uint64_t GetSummaryCount() const {
+ return m_summary_count.load(std::memory_order_relaxed);
+ }
+
+ StatsDuration &GetDurationReference() { return m_total_time; }
+
+ std::string GetSummaryKindName() const { return m_impl_type; }
+
+ llvm::json::Value ToJSON() const;
+
+ // Basic RAII class to increment the summary count when the call is complete.
+ // In the future this can be extended to collect information about the
+ // elapsed time for a single request.
+ class SummaryInvocation {
+ public:
+ SummaryInvocation(SummaryStatistics &summary)
+ : m_summary(summary), m_elapsed_time(summary.GetDurationReference()) {}
+ ~SummaryInvocation() { m_summary.OnInvoked(); }
+
+ // Delete the copy constructor and assignment operator to prevent
+ // accidental double counting.
+ SummaryInvocation(const SummaryInvocation &) = delete;
+ SummaryInvocation &operator=(const SummaryInvocation &) = delete;
+
+ private:
+ SummaryStatistics &m_summary;
+ ElapsedTime m_elapsed_time;
+ };
+
+ SummaryInvocation GetSummaryInvocation() { return SummaryInvocation(*this); }
+
+private:
+ /// Called when Summary Invocation is destructed.
+ void OnInvoked() noexcept {
+ m_summary_count.fetch_add(1, std::memory_order_relaxed);
+ }
+
+ lldb_private::StatsDuration m_total_time;
+ std::string m_impl_type;
+ std::string m_name;
+ std::atomic<uint64_t> m_summary_count;
+};
+
+/// A class that wraps a std::map of SummaryStatistics objects behind a mutex.
+class SummaryStatisticsCache {
+public:
+ /// Get the SummaryStatistics object for a given provider name, or insert
+ /// if statistics for that provider is not in the map.
+ SummaryStatistics::SummaryInvocation
+ GetSummaryStatisticsForProviderName(lldb_private::TypeSummaryImpl &provider)
{
+ std::lock_guard<std::mutex> guard(m_map_mutex);
+ auto pair = m_summary_stats_map.try_emplace(provider.GetName(),
provider.GetName(),
+ provider.GetSummaryKindName());
+
+ return pair.first->second.GetSummaryInvocation();
+ }
+
+ llvm::json::Value ToJSON();
+
+private:
+ std::map<std::string, lldb_private::SummaryStatistics>
+ m_summary_stats_map;
----------------
JDevlieghere wrote:
```suggestion
llvm::StringMap<lldb_private::SummaryStatistics>
m_summary_stats_map;
```
https://github.com/llvm/llvm-project/pull/102708
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