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comparison src/cpu/x86/vm/interp_masm_x86_32.cpp @ 12875:d13d7aba8c12

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8023657: New type profiling points: arguments to call Summary: x86 interpreter and c1 type profiling for arguments at calls Reviewed-by: kvn, twisti
author roland
date Wed, 09 Oct 2013 16:32:21 +0200
parents aeaca88565e6
children ce0cc25bc5e2
comparison
equal deleted inserted replaced
12874:46ef27bcacb3 12875:d13d7aba8c12
1044 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); 1044 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1045 bind (profile_continue); 1045 bind (profile_continue);
1046 } 1046 }
1047 } 1047 }
1048 1048
1049 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
1050 Label update, next, none;
1051
1052 verify_oop(obj);
1053
1054 testptr(obj, obj);
1055 jccb(Assembler::notZero, update);
1056 orptr(mdo_addr, TypeEntries::null_seen);
1057 jmpb(next);
1058
1059 bind(update);
1060 load_klass(obj, obj);
1061
1062 xorptr(obj, mdo_addr);
1063 testptr(obj, TypeEntries::type_klass_mask);
1064 jccb(Assembler::zero, next); // klass seen before, nothing to
1065 // do. The unknown bit may have been
1066 // set already but no need to check.
1067
1068 testptr(obj, TypeEntries::type_unknown);
1069 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
1070
1071 cmpptr(mdo_addr, 0);
1072 jccb(Assembler::equal, none);
1073 cmpptr(mdo_addr, TypeEntries::null_seen);
1074 jccb(Assembler::equal, none);
1075 // There is a chance that the checks above (re-reading profiling
1076 // data from memory) fail if another thread has just set the
1077 // profiling to this obj's klass
1078 xorptr(obj, mdo_addr);
1079 testptr(obj, TypeEntries::type_klass_mask);
1080 jccb(Assembler::zero, next);
1081
1082 // different than before. Cannot keep accurate profile.
1083 orptr(mdo_addr, TypeEntries::type_unknown);
1084 jmpb(next);
1085
1086 bind(none);
1087 // first time here. Set profile type.
1088 movptr(mdo_addr, obj);
1089
1090 bind(next);
1091 }
1092
1093 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
1094 if (!ProfileInterpreter) {
1095 return;
1096 }
1097
1098 if (MethodData::profile_arguments()) {
1099 Label profile_continue;
1100
1101 test_method_data_pointer(mdp, profile_continue);
1102
1103 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
1104
1105 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
1106 jcc(Assembler::notEqual, profile_continue);
1107
1108 Label done;
1109 int off_to_args = in_bytes(TypeStackSlotEntries::args_data_offset());
1110 addptr(mdp, off_to_args);
1111
1112 for (int i = 0; i < TypeProfileArgsLimit; i++) {
1113 if (i > 0) {
1114 movl(tmp, Address(mdp, in_bytes(TypeStackSlotEntries::cell_count_offset())-off_to_args));
1115 subl(tmp, i*TypeStackSlotEntries::per_arg_count());
1116 cmpl(tmp, TypeStackSlotEntries::per_arg_count());
1117 jcc(Assembler::less, done);
1118 }
1119 movptr(tmp, Address(callee, Method::const_offset()));
1120 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
1121 subl(tmp, Address(mdp, in_bytes(TypeStackSlotEntries::stack_slot_offset(i))-off_to_args));
1122 subl(tmp, 1);
1123 Address arg_addr = argument_address(tmp);
1124 movptr(tmp, arg_addr);
1125
1126 Address mdo_arg_addr(mdp, in_bytes(TypeStackSlotEntries::type_offset(i))-off_to_args);
1127 profile_obj_type(tmp, mdo_arg_addr);
1128
1129 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
1130 addptr(mdp, to_add);
1131 off_to_args += to_add;
1132 }
1133
1134 bind(done);
1135
1136 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp);
1137
1138 bind(profile_continue);
1139 }
1140 }
1049 1141
1050 void InterpreterMacroAssembler::profile_call(Register mdp) { 1142 void InterpreterMacroAssembler::profile_call(Register mdp) {
1051 if (ProfileInterpreter) { 1143 if (ProfileInterpreter) {
1052 Label profile_continue; 1144 Label profile_continue;
1053 1145