src/cpu/x86/vm/interp_masm_x86_32.cpp

rev 5462 : 8026251: New type profiling points: parameters to methods
Summary: x86 interpreter and c1 type profiling for parameters on method entries
Reviewed-by:

*** 1197,1206 ****
--- 1197,1252 ----
  
      bind(profile_continue);
    }
  }
  
+ void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
+   if (ProfileInterpreter && MethodData::profile_parameters()) {
+     Label profile_continue, done;
+ 
+     test_method_data_pointer(mdp, profile_continue);
+ 
+     // Load the offset of the area within the MDO used for
+     // parameters. If it's negative we're not profiling any parameters
+     movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
+     testl(tmp1, tmp1);
+     jcc(Assembler::negative, profile_continue);
+ 
+     // Compute a pointer to the area for parameters from the offset
+     // and move the pointer to the slot for the last
+     // parameters. Collect profiling from last parameter down.
+     // mdo start + parameters offset + array length - 1
+     addptr(mdp, tmp1);
+     movl(tmp1, Address(mdp, in_bytes(ArrayData::array_len_offset())));
+     decrement(tmp1, TypeStackSlotEntries::per_arg_count());
+ 
+     Label loop;
+     bind(loop);
+ 
+     int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
+     int type_base = in_bytes(ParametersTypeData::type_offset(0));
+     Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
+     Address arg_off(mdp, tmp1, per_arg_scale, off_base);
+     Address arg_type(mdp, tmp1, per_arg_scale, type_base);
+ 
+     // load offset on the stack from the slot for this parameter
+     movl(tmp2, arg_off);
+     negl(tmp2);
+     // read the parameter from the local area
+     movptr(tmp2, Address(rdi, tmp2, Interpreter::stackElementScale()));
+ 
+     // profile the parameter
+     profile_obj_type(tmp2, arg_type);
+ 
+     // go to next parameter
+     decrement(tmp1, TypeStackSlotEntries::per_arg_count());
+     jcc(Assembler::positive, loop);
+ 
+     bind(profile_continue);
+   }
+ }
+ 
  void InterpreterMacroAssembler::profile_call(Register mdp) {
    if (ProfileInterpreter) {
      Label profile_continue;
  
      // If no method data exists, go to profile_continue.