1 /* 2 * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2014, Red Hat Inc. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #include "precompiled.hpp" 27 #include "interpreter/interpreter.hpp" 28 #include "oops/constMethod.hpp" 29 #include "oops/method.hpp" 30 #include "runtime/frame.inline.hpp" 31 #include "utilities/debug.hpp" 32 #include "utilities/macros.hpp" 33 34 35 int AbstractInterpreter::BasicType_as_index(BasicType type) { 36 int i = 0; 37 switch (type) { 38 case T_BOOLEAN: i = 0; break; 39 case T_CHAR : i = 1; break; 40 case T_BYTE : i = 2; break; 41 case T_SHORT : i = 3; break; 42 case T_INT : i = 4; break; 43 case T_LONG : i = 5; break; 44 case T_VOID : i = 6; break; 45 case T_FLOAT : i = 7; break; 46 case T_DOUBLE : i = 8; break; 47 case T_OBJECT : i = 9; break; 48 case T_ARRAY : i = 9; break; 49 default : ShouldNotReachHere(); 50 } 51 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, 52 "index out of bounds"); 53 return i; 54 } 55 56 // These should never be compiled since the interpreter will prefer 57 // the compiled version to the intrinsic version. 58 bool AbstractInterpreter::can_be_compiled(methodHandle m) { 59 switch (method_kind(m)) { 60 case Interpreter::java_lang_math_sin : // fall thru 61 case Interpreter::java_lang_math_cos : // fall thru 62 case Interpreter::java_lang_math_tan : // fall thru 63 case Interpreter::java_lang_math_abs : // fall thru 64 case Interpreter::java_lang_math_log : // fall thru 65 case Interpreter::java_lang_math_log10 : // fall thru 66 case Interpreter::java_lang_math_sqrt : // fall thru 67 case Interpreter::java_lang_math_pow : // fall thru 68 case Interpreter::java_lang_math_exp : 69 return false; 70 default: 71 return true; 72 } 73 } 74 75 // How much stack a method activation needs in words. 76 int AbstractInterpreter::size_top_interpreter_activation(Method* method) { 77 const int entry_size = frame::interpreter_frame_monitor_size(); 78 79 // total overhead size: entry_size + (saved rfp thru expr stack 80 // bottom). be sure to change this if you add/subtract anything 81 // to/from the overhead area 82 const int overhead_size = 83 -(frame::interpreter_frame_initial_sp_offset) + entry_size; 84 85 const int stub_code = frame::entry_frame_after_call_words; 86 const int method_stack = (method->max_locals() + method->max_stack()) * 87 Interpreter::stackElementWords; 88 return (overhead_size + method_stack + stub_code); 89 } 90 91 // asm based interpreter deoptimization helpers 92 int AbstractInterpreter::size_activation(int max_stack, 93 int temps, 94 int extra_args, 95 int monitors, 96 int callee_params, 97 int callee_locals, 98 bool is_top_frame) { 99 // Note: This calculation must exactly parallel the frame setup 100 // in InterpreterGenerator::generate_method_entry. 101 102 // fixed size of an interpreter frame: 103 int overhead = frame::sender_sp_offset - 104 frame::interpreter_frame_initial_sp_offset; 105 // Our locals were accounted for by the caller (or last_frame_adjust 106 // on the transistion) Since the callee parameters already account 107 // for the callee's params we only need to account for the extra 108 // locals. 109 int size = overhead + 110 (callee_locals - callee_params)*Interpreter::stackElementWords + 111 monitors * frame::interpreter_frame_monitor_size() + 112 temps* Interpreter::stackElementWords + extra_args; 113 114 // On AArch64 we always keep the stack pointer 16-aligned, so we 115 // must round up here. 116 size = round_to(size, 2); 117 118 return size; 119 } 120 121 void AbstractInterpreter::layout_activation(Method* method, 122 int tempcount, 123 int popframe_extra_args, 124 int moncount, 125 int caller_actual_parameters, 126 int callee_param_count, 127 int callee_locals, 128 frame* caller, 129 frame* interpreter_frame, 130 bool is_top_frame, 131 bool is_bottom_frame) { 132 // The frame interpreter_frame is guaranteed to be the right size, 133 // as determined by a previous call to the size_activation() method. 134 // It is also guaranteed to be walkable even though it is in a 135 // skeletal state 136 137 int max_locals = method->max_locals() * Interpreter::stackElementWords; 138 int extra_locals = (method->max_locals() - method->size_of_parameters()) * 139 Interpreter::stackElementWords; 140 141 #ifdef ASSERT 142 assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable"); 143 #endif 144 145 interpreter_frame->interpreter_frame_set_method(method); 146 // NOTE the difference in using sender_sp and 147 // interpreter_frame_sender_sp interpreter_frame_sender_sp is 148 // the original sp of the caller (the unextended_sp) and 149 // sender_sp is fp+8/16 (32bit/64bit) XXX 150 intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1; 151 152 #ifdef ASSERT 153 if (caller->is_interpreted_frame()) { 154 assert(locals < caller->fp() + frame::interpreter_frame_initial_sp_offset, "bad placement"); 155 } 156 #endif 157 158 interpreter_frame->interpreter_frame_set_locals(locals); 159 BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin(); 160 BasicObjectLock* monbot = montop - moncount; 161 interpreter_frame->interpreter_frame_set_monitor_end(monbot); 162 163 // Set last_sp 164 intptr_t* esp = (intptr_t*) monbot - 165 tempcount*Interpreter::stackElementWords - 166 popframe_extra_args; 167 interpreter_frame->interpreter_frame_set_last_sp(esp); 168 169 // All frames but the initial (oldest) interpreter frame we fill in have 170 // a value for sender_sp that allows walking the stack but isn't 171 // truly correct. Correct the value here. 172 if (extra_locals != 0 && 173 interpreter_frame->sender_sp() == 174 interpreter_frame->interpreter_frame_sender_sp()) { 175 interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() + 176 extra_locals); 177 } 178 *interpreter_frame->interpreter_frame_cache_addr() = 179 method->constants()->cache(); 180 }