src/hotspot/share/interpreter/invocationCounter.cpp

rev 53568 : 8218031: Zero broken after JDK-8217922 (Compiler dead code removal)
Reviewed-by: thartmann, sgehwolf, shade
Contributed-by: Ao Qi <aoqi@loongson.cn>

@@ -77,10 +77,14 @@
 // Initialization
 
 int                       InvocationCounter::_init  [InvocationCounter::number_of_states];
 InvocationCounter::Action InvocationCounter::_action[InvocationCounter::number_of_states];
 
+#ifdef CC_INTERP
+int                       InvocationCounter::InterpreterInvocationLimit;
+int                       InvocationCounter::InterpreterBackwardBranchLimit;
+#endif
 
 const char* InvocationCounter::state_as_string(State state) {
   switch (state) {
     case wait_for_nothing            : return "wait_for_nothing";
     case wait_for_compile            : return "wait_for_compile";

@@ -130,10 +134,26 @@
 void InvocationCounter::reinitialize() {
   // define states
   guarantee((int)number_of_states <= (int)state_limit, "adjust number_of_state_bits");
   def(wait_for_nothing, 0, do_nothing);
   def(wait_for_compile, 0, do_decay);
+
+#ifdef CC_INTERP
+  InterpreterInvocationLimit = CompileThreshold << number_of_noncount_bits;
+
+  // When methodData is collected, the backward branch limit is compared against a
+  // methodData counter, rather than an InvocationCounter.  In the former case, we
+  // don't need the shift by number_of_noncount_bits, but we do need to adjust
+  // the factor by which we scale the threshold.
+  if (ProfileInterpreter) {
+    InterpreterBackwardBranchLimit = (int)((int64_t)CompileThreshold * (OnStackReplacePercentage - InterpreterProfilePercentage) / 100);
+  } else {
+    InterpreterBackwardBranchLimit = (int)(((int64_t)CompileThreshold * OnStackReplacePercentage / 100) << number_of_noncount_bits);
+  }
+
+  assert(0 <= InterpreterBackwardBranchLimit, "OSR threshold should be non-negative");
+#endif
 }
 
 void invocationCounter_init() {
   InvocationCounter::reinitialize();
 }