Add some simple exceptions stats

src/core/stats.h

@@ -28,9 +28,10 @@ namespace pyston {
 
 #define DISABLE_STATS 0
 
-#define STAT_ALLOCATIONS 0 && !DISABLE_STATS
-#define STAT_TIMERS 0 && !DISABLE_STATS
-#define EXPENSIVE_STAT_TIMERS 0 && STAT_TIMERS
+#define STAT_ALLOCATIONS (0 && !DISABLE_STATS)
+#define STAT_EXCEPTIONS (0 && !DISABLE_STATS)
+#define STAT_TIMERS (0 && !DISABLE_STATS)
+#define EXPENSIVE_STAT_TIMERS (0 && STAT_TIMERS)
 
 #if STAT_TIMERS
 #define STAT_TIMER(id, name)                                                                                           \

src/runtime/stacktrace.cpp

@@ -57,6 +57,15 @@ void raiseRaw(const ExcInfo& e) {
     assert(gc::isValidGCObject(e.value));
     assert(gc::isValidGCObject(e.traceback));
 
+#if STAT_EXCEPTIONS
+    std::string stat_name;
+    if (PyType_Check(e.type))
+        stat_name = "num_exceptions_" + std::string(static_cast<BoxedClass*>(e.type)->tp_name);
+    else
+        stat_name = "num_exceptions_" + std::string(e.value->cls->tp_name);
+    Stats::log(Stats::getStatCounter(stat_name));
+#endif
+
     throw e;
 }