[lldb] [llvm] [lldb][telemetry] Implement LLDB Telemetry (part 1) (PR #119716)

[Pavel Labath via llvm-commits]

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@@ -0,0 +1,338 @@
+
+//===-- Telemetry.cpp -----------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+#include "lldb/Core/Telemetry.h"
+
+#include <chrono>
+#include <cstdlib>
+#include <ctime>
+#include <fstream>
+#include <memory>
+#include <string>
+#include <typeinfo>
+#include <utility>
+#include <vector>
+
+#include "lldb/API/SBDebugger.h"
+#include "lldb/API/SBProcess.h"
+#include "lldb/Core/Debugger.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Host/FileSystem.h"
+#include "lldb/Host/HostInfo.h"
+#include "lldb/Interpreter/CommandInterpreter.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/Statistics.h"
+#include "lldb/Utility/ConstString.h"
+#include "lldb/Utility/FileSpec.h"
+#include "lldb/Utility/LLDBLog.h"
+#include "lldb/Utility/UUID.h"
+#include "lldb/Version/Version.h"
+#include "lldb/lldb-enumerations.h"
+#include "lldb/lldb-forward.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/JSON.h"
+#include "llvm/Support/LineIterator.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/RandomNumberGenerator.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Telemetry/Telemetry.h"
+
+namespace lldb_private {
+
+using ::llvm::Error;
+using ::llvm::telemetry::Destination;
+using ::llvm::telemetry::TelemetryInfo;
+
+static size_t ToNanosecOrZero(const std::optional<SteadyTimePoint> &Point) {
+  if (!Point.has_value())
+    return 0;
+
+  return Point.value().time_since_epoch().count();
----------------
labath wrote:

This doesn't actually guarantee a result in nanoseconds (because the resolution of the steady_clock is system dependent). You want to explicitly convert this to nanoseconds here (`nanoseconds(Point->time_since_epoch()).count())`), or explicitly set the SteadyTimePoint resolution to nanoseconds (`time_point<steady_clock, nanoseconds>`) -- or both.

Also, size_t is a somewhat unexpected type for a time. That's usually reserved for container indexes.

https://github.com/llvm/llvm-project/pull/119716