Add some more exceptions stats

src/codegen/unwinding.cpp

@@ -604,6 +604,9 @@ static const LineInfo lineInfoForFrame(PythonFrameIteratorImpl* frame_it) {
 }
 
 void exceptionCaughtInInterpreter(LineInfo line_info, ExcInfo* exc_info) {
+    static StatCounter frames_unwound("num_frames_unwound_python");
+    frames_unwound.log();
+
     // basically the same as PythonUnwindSession::addTraceback, but needs to
     // be callable after an PythonUnwindSession has ended.  The interpreter
     // will call this from catch blocks if it needs to ensure that a
@@ -632,6 +635,9 @@ void unwindingThroughFrame(PythonUnwindSession* unwind_session, unw_cursor_t* cu
         assert(!unwind_session->shouldSkipFrame());
         unwind_session->setShouldSkipNextFrame(true);
     } else if (frameIsPythonFrame(ip, bp, cursor, &frame_iter)) {
+        static StatCounter frames_unwound("num_frames_unwound_python");
+        frames_unwound.log();
+
         if (!unwind_session->shouldSkipFrame())
             unwind_session->addTraceback(lineInfoForFrame(&frame_iter));
 

src/runtime/cxx_unwind.cpp

@@ -496,6 +496,9 @@ static inline void unwind_loop(ExcInfo* exc_data) {
     while (unw_step(&cursor) > 0) {
         unw_proc_info_t pip;
 
+        static StatCounter frames_unwound("num_frames_unwound_cxx");
+        frames_unwound.log();
+
         // NB. unw_get_proc_info is slow; a significant chunk of all time spent unwinding is spent here.
         check(unw_get_proc_info(&cursor, &pip));
 
@@ -668,6 +671,9 @@ static uint64_t* unwinding_stattimer = pyston::Stats::getStatCounter("us_timer_u
 #endif
 
 extern "C" void __cxa_throw(void* exc_obj, std::type_info* tinfo, void (*dtor)(void*)) {
+    static pyston::StatCounter num_cxa_throw("num_cxa_throw");
+    num_cxa_throw.log();
+
     assert(!pyston::in_cleanup_code);
     assert(exc_obj);
     RELEASE_ASSERT(tinfo == &EXCINFO_TYPE_INFO, "can't throw a non-ExcInfo value! type info: %p", tinfo);