Do not call exit_threads() in Application d'tor

Because exit_threads() references the global object TM, we
need to call the function when still inside main(), otherwise,
due to undefined global object initialization and destruction
we could end up with referencing an already destroyed object.

Actually this should not happen because Application singleton
is initialized _only_ after all the other globals due to how
Application::initialize() is defined, but this is very tricky
C++ and not easy to follow, even for me ;-)

Also rearranged a bit main() code flow.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

diff --git a/src/application.cpp b/src/application.cpp
index 31e12a9..2d7a10b 100644 (file)
--- a/src/application.cpp
+++ b/src/application.cpp
@@ -57,12 +57,6 @@ Application::Application() {
         genrand_int32();
 }
 
-Application::~Application() {
-
-  exit_threads();
-  quit_eval();
-}
-
 void Application::initialize() {
 
   // A static Application object is allocated
@@ -70,7 +64,15 @@ void Application::initialize() {
   static Application singleton;
 }
 
+void Application::free_resources() {
+
+  // Warning, following functions reference global objects that
+  // must be still alive when free_resources() is called.
+  exit_threads();
+  quit_eval();
+}
+
 void Application::exit_with_failure() {
 
-  exit(EXIT_FAILURE); // d'tor will be called automatically
+  exit(EXIT_FAILURE);
 }

diff --git a/src/application.h b/src/application.h
index 0c139a6..931e2e2 100644 (file)
--- a/src/application.h
+++ b/src/application.h
@@ -29,10 +29,10 @@ class Application {
 
   Application();
   Application(const Application&);
- ~Application();
 
 public:
   static void initialize();
+  static void free_resources();
   static void exit_with_failure();
 };
 

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 36f88f4..2b3335c 100644 (file)
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -382,7 +382,7 @@ Value do_evaluate(const Position& pos, EvalInfo& ei, int threadID) {
   // Middle-game specific evaluation terms
   if (phase > PHASE_ENDGAME)
   {
-    // Pawn storms in positions with opposite castling.
+    // Pawn storms in positions with opposite castling
     if (   square_file(pos.king_square(WHITE)) >= FILE_E
         && square_file(pos.king_square(BLACK)) <= FILE_D)
 

diff --git a/src/main.cpp b/src/main.cpp
index b487060..e623297 100644 (file)
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -57,8 +57,19 @@ int main(int argc, char *argv[]) {
   CALLGRIND_START_INSTRUMENTATION;
 #endif
 
-  // Process command line arguments if any
-  if (argc > 1)
+  if (argc <= 1)
+  {
+      // Print copyright notice
+      cout << engine_name()
+           << " by Tord Romstad, Marco Costalba, Joona Kiiski" << endl;
+
+      if (CpuHasPOPCNT)
+          cout << "Good! CPU has hardware POPCNT." << endl;
+
+      // Enter UCI mode
+      uci_main_loop();
+  }
+  else // Process command line arguments
   {
       if (string(argv[1]) != "bench" || argc < 4 || argc > 8)
           cout << "Usage: stockfish bench <hash size> <threads> "
@@ -68,22 +79,13 @@ int main(int argc, char *argv[]) {
       else
       {
           string time = argc > 4 ? argv[4] : "60";
-          string fen = argc > 5 ? argv[5] : "default";
-          string lim = argc > 6 ? argv[6] : "time";
-          string tim = argc > 7 ? argv[7] : "";
+          string fen  = argc > 5 ? argv[5] : "default";
+          string lim  = argc > 6 ? argv[6] : "time";
+          string tim  = argc > 7 ? argv[7] : "";
           benchmark(string(argv[2]) + " " + string(argv[3]) + " " + time + " " + fen + " " + lim + " " + tim);
       }
-      return 0;
   }
 
-  // Print copyright notice
-  cout << engine_name()
-       << ". By Tord Romstad, Marco Costalba, Joona Kiiski." << endl;
-
-  if (CpuHasPOPCNT)
-      cout << "Good! CPU has hardware POPCNT. We will use it." << endl;
-
-  // Enter UCI mode
-  uci_main_loop();
+  Application::free_resources();
   return 0;
 }