1 /* 2 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2015 SAP AG. 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, "index out of bounds"); 52 return i; 53 } 54 55 // These should never be compiled since the interpreter will prefer 56 // the compiled version to the intrinsic version. 57 bool AbstractInterpreter::can_be_compiled(methodHandle m) { 58 return !TemplateInterpreter::math_entry_available(method_kind(m)); 59 } 60 61 // How much stack a method activation needs in stack slots. 62 // We must calc this exactly like in generate_fixed_frame. 63 // Note: This returns the conservative size assuming maximum alignment. 64 int AbstractInterpreter::size_top_interpreter_activation(Method* method) { 65 const int max_alignment_size = 2; 66 const int abi_scratch = frame::abi_reg_args_size; 67 return method->max_locals() + method->max_stack() + 68 frame::interpreter_frame_monitor_size() + max_alignment_size + abi_scratch; 69 } 70 71 // Returns number of stackElementWords needed for the interpreter frame with the 72 // given sections. 73 // This overestimates the stack by one slot in case of alignments. 74 int AbstractInterpreter::size_activation(int max_stack, 75 int temps, 76 int extra_args, 77 int monitors, 78 int callee_params, 79 int callee_locals, 80 bool is_top_frame) { 81 // Note: This calculation must exactly parallel the frame setup 82 // in InterpreterGenerator::generate_fixed_frame. 83 assert(Interpreter::stackElementWords == 1, "sanity"); 84 const int max_alignment_space = StackAlignmentInBytes / Interpreter::stackElementSize; 85 const int abi_scratch = is_top_frame ? (frame::abi_reg_args_size / Interpreter::stackElementSize) : 86 (frame::abi_minframe_size / Interpreter::stackElementSize); 87 const int size = 88 max_stack + 89 (callee_locals - callee_params) + 90 monitors * frame::interpreter_frame_monitor_size() + 91 max_alignment_space + 92 abi_scratch + 93 frame::ijava_state_size / Interpreter::stackElementSize; 94 95 // Fixed size of an interpreter frame, align to 16-byte. 96 return (size & -2); 97 } 98 99 // Fills a sceletal interpreter frame generated during deoptimizations. 100 // 101 // Parameters: 102 // 103 // interpreter_frame != NULL: 104 // set up the method, locals, and monitors. 105 // The frame interpreter_frame, if not NULL, is guaranteed to be the 106 // right size, as determined by a previous call to this method. 107 // It is also guaranteed to be walkable even though it is in a skeletal state 108 // 109 // is_top_frame == true: 110 // We're processing the *oldest* interpreter frame! 111 // 112 // pop_frame_extra_args: 113 // If this is != 0 we are returning to a deoptimized frame by popping 114 // off the callee frame. We want to re-execute the call that called the 115 // callee interpreted, but since the return to the interpreter would pop 116 // the arguments off advance the esp by dummy popframe_extra_args slots. 117 // Popping off those will establish the stack layout as it was before the call. 118 // 119 void AbstractInterpreter::layout_activation(Method* method, 120 int tempcount, 121 int popframe_extra_args, 122 int moncount, 123 int caller_actual_parameters, 124 int callee_param_count, 125 int callee_locals_count, 126 frame* caller, 127 frame* interpreter_frame, 128 bool is_top_frame, 129 bool is_bottom_frame) { 130 131 const int abi_scratch = is_top_frame ? (frame::abi_reg_args_size / Interpreter::stackElementSize) : 132 (frame::abi_minframe_size / Interpreter::stackElementSize); 133 134 intptr_t* locals_base = (caller->is_interpreted_frame()) ? 135 caller->interpreter_frame_esp() + caller_actual_parameters : 136 caller->sp() + method->max_locals() - 1 + (frame::abi_minframe_size / Interpreter::stackElementSize) ; 137 138 intptr_t* monitor_base = caller->sp() - frame::ijava_state_size / Interpreter::stackElementSize ; 139 intptr_t* monitor = monitor_base - (moncount * frame::interpreter_frame_monitor_size()); 140 intptr_t* esp_base = monitor - 1; 141 intptr_t* esp = esp_base - tempcount - popframe_extra_args; 142 intptr_t* sp = (intptr_t *) (((intptr_t) (esp_base - callee_locals_count + callee_param_count - method->max_stack()- abi_scratch)) & -StackAlignmentInBytes); 143 intptr_t* sender_sp = caller->sp() + (frame::abi_minframe_size - frame::abi_reg_args_size) / Interpreter::stackElementSize; 144 intptr_t* top_frame_sp = is_top_frame ? sp : sp + (frame::abi_minframe_size - frame::abi_reg_args_size) / Interpreter::stackElementSize; 145 146 interpreter_frame->interpreter_frame_set_method(method); 147 interpreter_frame->interpreter_frame_set_locals(locals_base); 148 interpreter_frame->interpreter_frame_set_cpcache(method->constants()->cache()); 149 interpreter_frame->interpreter_frame_set_esp(esp); 150 interpreter_frame->interpreter_frame_set_monitor_end((BasicObjectLock *)monitor); 151 interpreter_frame->interpreter_frame_set_top_frame_sp(top_frame_sp); 152 if (!is_bottom_frame) { 153 interpreter_frame->interpreter_frame_set_sender_sp(sender_sp); 154 } 155 } 156 157 // Support abs and sqrt like in compiler. 158 // For others we can use a normal (native) entry. 159 160 bool TemplateInterpreter::math_entry_available(AbstractInterpreter::MethodKind kind) { 161 if (!InlineIntrinsics) return false; 162 163 return ((kind==Interpreter::java_lang_math_sqrt && VM_Version::has_fsqrt()) || 164 (kind==Interpreter::java_lang_math_abs)); 165 } 166 167