SERVER-30170 Embedded can now shutdown and re-initialize.

- ServiceContext* is now closer to be an instance context for the database. We still don't support multiple instances but I wrote the new code with this in mind. Teardown and reinitialize then becomes a matter of being able to delete and re-create the ServiceContext*.
- Use the new MONGO_INITIALIZER that supports deinit/reinit to be able to re-initialize global systems that are decorations on ServiceContext.
- Move creation/destruction of ServiceContext* out of MONGO_INITIALIZER. This so we can hold an exclusive lock during as much as possible of the shutdown (like how mongod does)
- New ServiceContext registrer where we can link in different implementations of ServiceContext (replaces the SetGlobalEnvironment MONGO_INITIALIZER)
- As a result the SetGlobalEnvironment prerequisite for MONGO_INITIALIZERs is gone.
- The ServiceContext is passed to runGlobalInitializers, put in InitializationContext/DeinitializationContext so the initializers know which context they operate on.

1 files changed, 9 insertions, 1 deletions

diff --git a/src/mongo/unittest/benchmark_main.cpp b/src/mongo/unittest/benchmark_main.cpp
index a992ddb06bf..b714ace268a 100644
--- a/src/mongo/unittest/benchmark_main.cpp
+++ b/src/mongo/unittest/benchmark_main.cpp
@@ -33,13 +33,21 @@
 #include <benchmark/benchmark.h>
 
 #include "mongo/base/initializer.h"
+#include "mongo/db/service_context.h"
+#include "mongo/db/service_context_registrar.h"
 #include "mongo/util/signal_handlers_synchronous.h"
 
 
 int main(int argc, char** argv, char** envp) {
     ::mongo::clearSignalMask();
     ::mongo::setupSynchronousSignalHandlers();
-    ::mongo::runGlobalInitializersOrDie(argc, argv, envp);
+
+    ::mongo::ServiceContext* serviceContext = nullptr;
+    if (::mongo::hasServiceContextFactory()) {
+        ::mongo::setGlobalServiceContext(::mongo::createServiceContext());
+        serviceContext = ::mongo::getGlobalServiceContext();
+    }
+    ::mongo::runGlobalInitializersOrDie(argc, argv, envp, serviceContext);
 
     // Copied from the BENCHMARK_MAIN macro.
     ::benchmark::Initialize(&argc, argv);