[Lldb-commits] [lldb] [LLDB][Data Formatters] Calculate average and total time for summary providers within lldb (PR #102708)

[Michael Buch via lldb-commits]

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@@ -0,0 +1,64 @@
+#include "lldb/DataFormatters/TypeSummary.h"
+#include "lldb/Target/Statistics.h"
+#include "lldb/Utility/Stream.h"
+#include "lldb/lldb-forward.h"
+#include "lldb/lldb-private-enumerations.h"
+#include "lldb/lldb-private.h"
+#include "llvm/Testing/Support/Error.h"
+#include "gtest/gtest.h"
+#include <thread>
+
+using namespace lldb_private;
+using Duration = std::chrono::duration<double>;
+
+class DummySummaryImpl : public lldb_private::TypeSummaryImpl {
+public:
+  DummySummaryImpl(Duration sleepTime)
+      : TypeSummaryImpl(TypeSummaryImpl::Kind::eSummaryString,
+                        TypeSummaryImpl::Flags()),
+        m_sleepTime(sleepTime) {}
+
+  std::string GetName() override { return "DummySummary"; }
+
+  std::string GetSummaryKindName() override { return "dummy"; }
+
+  std::string GetDescription() override { return ""; }
+
+  bool FormatObject(ValueObject *valobj, std::string &dest,
+                    const TypeSummaryOptions &options) override {
+    return false;
+  }
+
+  void FakeFormat() { std::this_thread::sleep_for(m_sleepTime); }
+
+private:
+  Duration m_sleepTime;
+};
+
+TEST(MultithreadFormatting, Multithread) {
+  SummaryStatisticsCache statistics_cache;
+  DummySummaryImpl summary(Duration(1));
+  std::vector<std::thread> threads;
+  for (int i = 0; i < 10; ++i) {
+    threads.emplace_back(std::thread([&statistics_cache, &summary]() {
+      auto sp = statistics_cache.GetSummaryStatisticsForProvider(summary);
+      {
+        SummaryStatistics::SummaryInvocation invocation(sp);
+        summary.FakeFormat();
----------------
Michael137 wrote:

Can we just call something like `std::this_thread::sleep_for(std::chrono::milliseconds(50))` here directly?

https://github.com/llvm/llvm-project/pull/102708