1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/x86/vm/interp_masm_x86.cpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,229 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "precompiled.hpp"
1.29 +#include "interp_masm_x86.hpp"
1.30 +#include "interpreter/interpreter.hpp"
1.31 +#include "oops/methodData.hpp"
1.32 +
1.33 +#ifndef CC_INTERP
1.34 +void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
1.35 + Label update, next, none;
1.36 +
1.37 + verify_oop(obj);
1.38 +
1.39 + testptr(obj, obj);
1.40 + jccb(Assembler::notZero, update);
1.41 + orptr(mdo_addr, TypeEntries::null_seen);
1.42 + jmpb(next);
1.43 +
1.44 + bind(update);
1.45 + load_klass(obj, obj);
1.46 +
1.47 + xorptr(obj, mdo_addr);
1.48 + testptr(obj, TypeEntries::type_klass_mask);
1.49 + jccb(Assembler::zero, next); // klass seen before, nothing to
1.50 + // do. The unknown bit may have been
1.51 + // set already but no need to check.
1.52 +
1.53 + testptr(obj, TypeEntries::type_unknown);
1.54 + jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
1.55 +
1.56 + cmpptr(mdo_addr, 0);
1.57 + jccb(Assembler::equal, none);
1.58 + cmpptr(mdo_addr, TypeEntries::null_seen);
1.59 + jccb(Assembler::equal, none);
1.60 + // There is a chance that the checks above (re-reading profiling
1.61 + // data from memory) fail if another thread has just set the
1.62 + // profiling to this obj's klass
1.63 + xorptr(obj, mdo_addr);
1.64 + testptr(obj, TypeEntries::type_klass_mask);
1.65 + jccb(Assembler::zero, next);
1.66 +
1.67 + // different than before. Cannot keep accurate profile.
1.68 + orptr(mdo_addr, TypeEntries::type_unknown);
1.69 + jmpb(next);
1.70 +
1.71 + bind(none);
1.72 + // first time here. Set profile type.
1.73 + movptr(mdo_addr, obj);
1.74 +
1.75 + bind(next);
1.76 +}
1.77 +
1.78 +void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
1.79 + if (!ProfileInterpreter) {
1.80 + return;
1.81 + }
1.82 +
1.83 + if (MethodData::profile_arguments() || MethodData::profile_return()) {
1.84 + Label profile_continue;
1.85 +
1.86 + test_method_data_pointer(mdp, profile_continue);
1.87 +
1.88 + int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
1.89 +
1.90 + cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
1.91 + jcc(Assembler::notEqual, profile_continue);
1.92 +
1.93 + if (MethodData::profile_arguments()) {
1.94 + Label done;
1.95 + int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
1.96 + addptr(mdp, off_to_args);
1.97 +
1.98 + for (int i = 0; i < TypeProfileArgsLimit; i++) {
1.99 + if (i > 0 || MethodData::profile_return()) {
1.100 + // If return value type is profiled we may have no argument to profile
1.101 + movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
1.102 + subl(tmp, i*TypeStackSlotEntries::per_arg_count());
1.103 + cmpl(tmp, TypeStackSlotEntries::per_arg_count());
1.104 + jcc(Assembler::less, done);
1.105 + }
1.106 + movptr(tmp, Address(callee, Method::const_offset()));
1.107 + load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
1.108 + // stack offset o (zero based) from the start of the argument
1.109 + // list, for n arguments translates into offset n - o - 1 from
1.110 + // the end of the argument list
1.111 + subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
1.112 + subl(tmp, 1);
1.113 + Address arg_addr = argument_address(tmp);
1.114 + movptr(tmp, arg_addr);
1.115 +
1.116 + Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
1.117 + profile_obj_type(tmp, mdo_arg_addr);
1.118 +
1.119 + int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
1.120 + addptr(mdp, to_add);
1.121 + off_to_args += to_add;
1.122 + }
1.123 +
1.124 + if (MethodData::profile_return()) {
1.125 + movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
1.126 + subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
1.127 + }
1.128 +
1.129 + bind(done);
1.130 +
1.131 + if (MethodData::profile_return()) {
1.132 + // We're right after the type profile for the last
1.133 + // argument. tmp is the number of cells left in the
1.134 + // CallTypeData/VirtualCallTypeData to reach its end. Non null
1.135 + // if there's a return to profile.
1.136 + assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
1.137 + shll(tmp, exact_log2(DataLayout::cell_size));
1.138 + addptr(mdp, tmp);
1.139 + }
1.140 + movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp);
1.141 + } else {
1.142 + assert(MethodData::profile_return(), "either profile call args or call ret");
1.143 + update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
1.144 + }
1.145 +
1.146 + // mdp points right after the end of the
1.147 + // CallTypeData/VirtualCallTypeData, right after the cells for the
1.148 + // return value type if there's one
1.149 +
1.150 + bind(profile_continue);
1.151 + }
1.152 +}
1.153 +
1.154 +void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
1.155 + assert_different_registers(mdp, ret, tmp, _bcp_register);
1.156 + if (ProfileInterpreter && MethodData::profile_return()) {
1.157 + Label profile_continue, done;
1.158 +
1.159 + test_method_data_pointer(mdp, profile_continue);
1.160 +
1.161 + if (MethodData::profile_return_jsr292_only()) {
1.162 + // If we don't profile all invoke bytecodes we must make sure
1.163 + // it's a bytecode we indeed profile. We can't go back to the
1.164 + // begining of the ProfileData we intend to update to check its
1.165 + // type because we're right after it and we don't known its
1.166 + // length
1.167 + Label do_profile;
1.168 + cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
1.169 + jcc(Assembler::equal, do_profile);
1.170 + cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
1.171 + jcc(Assembler::equal, do_profile);
1.172 + get_method(tmp);
1.173 + cmpb(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm);
1.174 + jcc(Assembler::notEqual, profile_continue);
1.175 +
1.176 + bind(do_profile);
1.177 + }
1.178 +
1.179 + Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
1.180 + mov(tmp, ret);
1.181 + profile_obj_type(tmp, mdo_ret_addr);
1.182 +
1.183 + bind(profile_continue);
1.184 + }
1.185 +}
1.186 +
1.187 +void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
1.188 + if (ProfileInterpreter && MethodData::profile_parameters()) {
1.189 + Label profile_continue, done;
1.190 +
1.191 + test_method_data_pointer(mdp, profile_continue);
1.192 +
1.193 + // Load the offset of the area within the MDO used for
1.194 + // parameters. If it's negative we're not profiling any parameters
1.195 + movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
1.196 + testl(tmp1, tmp1);
1.197 + jcc(Assembler::negative, profile_continue);
1.198 +
1.199 + // Compute a pointer to the area for parameters from the offset
1.200 + // and move the pointer to the slot for the last
1.201 + // parameters. Collect profiling from last parameter down.
1.202 + // mdo start + parameters offset + array length - 1
1.203 + addptr(mdp, tmp1);
1.204 + movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
1.205 + decrement(tmp1, TypeStackSlotEntries::per_arg_count());
1.206 +
1.207 + Label loop;
1.208 + bind(loop);
1.209 +
1.210 + int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
1.211 + int type_base = in_bytes(ParametersTypeData::type_offset(0));
1.212 + Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
1.213 + Address arg_off(mdp, tmp1, per_arg_scale, off_base);
1.214 + Address arg_type(mdp, tmp1, per_arg_scale, type_base);
1.215 +
1.216 + // load offset on the stack from the slot for this parameter
1.217 + movptr(tmp2, arg_off);
1.218 + negptr(tmp2);
1.219 + // read the parameter from the local area
1.220 + movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
1.221 +
1.222 + // profile the parameter
1.223 + profile_obj_type(tmp2, arg_type);
1.224 +
1.225 + // go to next parameter
1.226 + decrement(tmp1, TypeStackSlotEntries::per_arg_count());
1.227 + jcc(Assembler::positive, loop);
1.228 +
1.229 + bind(profile_continue);
1.230 + }
1.231 +}
1.232 +#endif
