telemetry: Log a few simple data fields throughout core.

src/core/loader/ncch.cpp

@@ -9,6 +9,7 @@
 #include "common/logging/log.h"
 #include "common/string_util.h"
 #include "common/swap.h"
+#include "core/core.h"
 #include "core/file_sys/archive_selfncch.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/resource_limit.h"
@@ -339,6 +340,8 @@ ResultStatus AppLoader_NCCH::Load() {
 
     LOG_INFO(Loader, "Program ID: %016" PRIX64, ncch_header.program_id);
 
+    Core::Telemetry().AddField(Telemetry::FieldType::Session, "ProgramId", ncch_header.program_id);
+
     is_loaded = true; // Set state to loaded
 
     result = LoadExec(); // Load the executable into memory for booting

src/core/telemetry_session.cpp

@@ -2,6 +2,8 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <cstring>
+
 #include "common/scm_rev.h"
 #include "core/telemetry_session.h"
 
@@ -10,9 +12,25 @@ namespace Core {
 TelemetrySession::TelemetrySession() {
     // TODO(bunnei): Replace with a backend that logs to our web service
     backend = std::make_unique<Telemetry::NullVisitor>();
+
+    // Log one-time session start information
+    const auto duration{std::chrono::steady_clock::now().time_since_epoch()};
+    const auto start_time{std::chrono::duration_cast<std::chrono::microseconds>(duration).count()};
+    AddField(Telemetry::FieldType::Session, "StartTime", start_time);
+
+    // Log one-time application information
+    const bool is_git_dirty{std::strstr(Common::g_scm_desc, "dirty") != nullptr};
+    AddField(Telemetry::FieldType::App, "GitIsDirty", is_git_dirty);
+    AddField(Telemetry::FieldType::App, "GitBranch", Common::g_scm_branch);
+    AddField(Telemetry::FieldType::App, "GitRevision", Common::g_scm_rev);
 }
 
 TelemetrySession::~TelemetrySession() {
+    // Log one-time session end information
+    const auto duration{std::chrono::steady_clock::now().time_since_epoch()};
+    const auto end_time{std::chrono::duration_cast<std::chrono::microseconds>(duration).count()};
+    AddField(Telemetry::FieldType::Session, "EndTime", end_time);
+
     // Complete the session, submitting to web service if necessary
     // This is just a placeholder to wrap up the session once the core completes and this is
     // destroyed. This will be moved elsewhere once we are actually doing real I/O with the service.

src/core/telemetry_session.h

@@ -31,7 +31,7 @@ public:
     }
 
 private:
-    Telemetry::FieldCollection field_collection; ///< Field collection, tracks all added fields
+    Telemetry::FieldCollection field_collection; ///< Tracks all added fields for the session
     std::unique_ptr<Telemetry::VisitorInterface> backend; ///< Backend interface that logs fields
 };