1 /* 2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "ci/ciMethod.hpp" 27 #include "interpreter/interpreter.hpp" 28 #include "runtime/frame.inline.hpp" 29 30 31 // asm based interpreter deoptimization helpers 32 int AbstractInterpreter::size_activation(int max_stack, 33 int temps, 34 int extra_args, 35 int monitors, 36 int callee_params, 37 int callee_locals, 38 bool is_top_frame) { 39 // Note: This calculation must exactly parallel the frame setup 40 // in TemplateInterpreterGenerator::generate_fixed_frame. 41 42 // fixed size of an interpreter frame: 43 int overhead = frame::sender_sp_offset - 44 frame::interpreter_frame_initial_sp_offset; 45 // Our locals were accounted for by the caller (or last_frame_adjust 46 // on the transistion) Since the callee parameters already account 47 // for the callee's params we only need to account for the extra 48 // locals. 49 int size = overhead + 50 (callee_locals - callee_params)*Interpreter::stackElementWords + 51 monitors * frame::interpreter_frame_monitor_size() + 52 temps* Interpreter::stackElementWords + extra_args; 53 54 return size; 55 } 56 57 void AbstractInterpreter::layout_activation(Method* method, 58 int tempcount, 59 int popframe_extra_args, 60 int moncount, 61 int caller_actual_parameters, 62 int callee_param_count, 63 int callee_locals, 64 frame* caller, 65 frame* interpreter_frame, 66 bool is_top_frame, 67 bool is_bottom_frame) { 68 // The frame interpreter_frame is guaranteed to be the right size, 69 // as determined by a previous call to the size_activation() method. 70 // It is also guaranteed to be walkable even though it is in a 71 // skeletal state 72 73 int max_locals = method->max_locals() * Interpreter::stackElementWords; 74 int extra_locals = (method->max_locals() - method->size_of_parameters()) * 75 Interpreter::stackElementWords; 76 77 #ifdef ASSERT 78 assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable"); 79 #endif 80 81 interpreter_frame->interpreter_frame_set_method(method); 82 // NOTE the difference in using sender_sp and 83 // interpreter_frame_sender_sp interpreter_frame_sender_sp is 84 // the original sp of the caller (the unextended_sp) and 85 // sender_sp is fp+8/16 (32bit/64bit) XXX 86 intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1; 87 88 #ifdef ASSERT 89 if (caller->is_interpreted_frame()) { 90 assert(locals < caller->fp() + frame::interpreter_frame_initial_sp_offset, "bad placement"); 91 } 92 #endif 93 94 interpreter_frame->interpreter_frame_set_locals(locals); 95 BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin(); 96 BasicObjectLock* monbot = montop - moncount; 97 interpreter_frame->interpreter_frame_set_monitor_end(monbot); 98 99 // Set last_sp 100 intptr_t* esp = (intptr_t*) monbot - 101 tempcount*Interpreter::stackElementWords - 102 popframe_extra_args; 103 interpreter_frame->interpreter_frame_set_last_sp(esp); 104 105 // All frames but the initial (oldest) interpreter frame we fill in have 106 // a value for sender_sp that allows walking the stack but isn't 107 // truly correct. Correct the value here. 108 if (extra_locals != 0 && 109 interpreter_frame->sender_sp() == 110 interpreter_frame->interpreter_frame_sender_sp()) { 111 interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() + 112 extra_locals); 113 } 114 *interpreter_frame->interpreter_frame_cache_addr() = 115 method->constants()->cache(); 116 *interpreter_frame->interpreter_frame_mirror_addr() = 117 method->method_holder()->java_mirror(); 118 } 119 120 #ifndef _LP64 121 int AbstractInterpreter::BasicType_as_index(BasicType type) { 122 int i = 0; 123 switch (type) { 124 case T_BOOLEAN: i = 0; break; 125 case T_CHAR : i = 1; break; 126 case T_BYTE : i = 2; break; 127 case T_SHORT : i = 3; break; 128 case T_INT : // fall through 129 case T_LONG : // fall through 130 case T_VOID : i = 4; break; 131 case T_FLOAT : i = 5; break; // have to treat float and double separately for SSE 132 case T_DOUBLE : i = 6; break; 133 case T_OBJECT : // fall through 134 case T_ARRAY : i = 7; break; 135 case T_VALUETYPE : i = 8; break; 136 default : ShouldNotReachHere(); 137 } 138 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds"); 139 return i; 140 } 141 #else 142 int AbstractInterpreter::BasicType_as_index(BasicType type) { 143 int i = 0; 144 switch (type) { 145 case T_BOOLEAN: i = 0; break; 146 case T_CHAR : i = 1; break; 147 case T_BYTE : i = 2; break; 148 case T_SHORT : i = 3; break; 149 case T_INT : i = 4; break; 150 case T_LONG : i = 5; break; 151 case T_VOID : i = 6; break; 152 case T_FLOAT : i = 7; break; 153 case T_DOUBLE : i = 8; break; 154 case T_OBJECT : i = 9; break; 155 case T_ARRAY : i = 9; break; 156 case T_VALUETYPE : i = 10; break; 157 default : ShouldNotReachHere(); 158 } 159 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, 160 "index out of bounds"); 161 return i; 162 } 163 #endif // _LP64 164 165 // How much stack a method activation needs in words. 166 int AbstractInterpreter::size_top_interpreter_activation(Method* method) { 167 const int entry_size = frame::interpreter_frame_monitor_size(); 168 169 // total overhead size: entry_size + (saved rbp thru expr stack 170 // bottom). be sure to change this if you add/subtract anything 171 // to/from the overhead area 172 const int overhead_size = 173 -(frame::interpreter_frame_initial_sp_offset) + entry_size; 174 175 #ifndef _LP64 176 const int stub_code = 4; // see generate_call_stub 177 #else 178 const int stub_code = frame::entry_frame_after_call_words; 179 #endif 180 181 const int method_stack = (method->max_locals() + method->max_stack()) * 182 Interpreter::stackElementWords; 183 return (overhead_size + method_stack + stub_code); 184 }