Add counters for requested/inserted/executed soft deopts

src/deoptimizer.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 529 matching lines @@
       deferred_heap_numbers_(0),
       trace_(false) {
   // For COMPILED_STUBs called from builtins, the function pointer is a SMI
   // indicating an internal frame.
   if (function->IsSmi()) {
     function = NULL;
   }
   if (function != NULL && function->IsOptimized()) {
     function->shared()->increment_deopt_count();
     if (bailout_type_ == Deoptimizer::SOFT) {
+      isolate->counters()->soft_deopts_executed()->Increment();
       // Soft deopts shouldn't count against the overall re-optimization count
       // that can eventually lead to disabling optimization for a function.
       int opt_count = function->shared()->opt_count();
       if (opt_count > 0) opt_count--;
       function->shared()->set_opt_count(opt_count);
     }
   }
   compiled_code_ = FindOptimizedCode(function, optimized_code);
   StackFrame::Type frame_type = function == NULL
       ? StackFrame::STUB
@@ skipping 2550 matching lines @@
 
 void DeoptimizedFrameInfo::Iterate(ObjectVisitor* v) {
   v->VisitPointer(BitCast<Object**>(&function_));
   v->VisitPointers(parameters_, parameters_ + parameters_count_);
   v->VisitPointers(expression_stack_, expression_stack_ + expression_count_);
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal