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 // Size of interpreter code. Increase if too small. Interpreter will 35 // fail with a guarantee ("not enough space for interpreter generation"); 36 // if too small. 37 // Run with +PrintInterpreter to get the VM to print out the size. 38 // Max size with JVMTI 39 int TemplateInterpreter::InterpreterCodeSize = 230*K; 40 41 int AbstractInterpreter::BasicType_as_index(BasicType type) { 42 int i = 0; 43 switch (type) { 44 case T_BOOLEAN: i = 0; break; 45 case T_CHAR : i = 1; break; 46 case T_BYTE : i = 2; break; 47 case T_SHORT : i = 3; break; 48 case T_INT : i = 4; break; 49 case T_LONG : i = 5; break; 50 case T_VOID : i = 6; break; 51 case T_FLOAT : i = 7; break; 52 case T_DOUBLE : i = 8; break; 53 case T_OBJECT : i = 9; break; 54 case T_ARRAY : i = 9; break; 55 default : ShouldNotReachHere(); 56 } 57 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds"); 58 return i; 59 } 60 61 // These should never be compiled since the interpreter will prefer 62 // the compiled version to the intrinsic version. 63 bool AbstractInterpreter::can_be_compiled(methodHandle m) { 64 return !TemplateInterpreter::math_entry_available(method_kind(m)); 65 } 66 67 // How much stack a method activation needs in stack slots. 68 // We must calc this exactly like in generate_fixed_frame. 69 // Note: This returns the conservative size assuming maximum alignment. 70 int AbstractInterpreter::size_top_interpreter_activation(Method* method) { 71 const int max_alignment_size = 2; 72 const int abi_scratch = frame::abi_reg_args_size; 73 return method->max_locals() + method->max_stack() + 74 frame::interpreter_frame_monitor_size() + max_alignment_size + abi_scratch; 75 } 76 77 // Returns number of stackElementWords needed for the interpreter frame with the 78 // given sections. 79 // This overestimates the stack by one slot in case of alignments. 80 int AbstractInterpreter::size_activation(int max_stack, 81 int temps, 82 int extra_args, 83 int monitors, 84 int callee_params, 85 int callee_locals, 86 bool is_top_frame) { 87 // Note: This calculation must exactly parallel the frame setup 88 // in TemplateInterpreterGenerator::generate_fixed_frame. 89 assert(Interpreter::stackElementWords == 1, "sanity"); 90 const int max_alignment_space = StackAlignmentInBytes / Interpreter::stackElementSize; 91 const int abi_scratch = is_top_frame ? (frame::abi_reg_args_size / Interpreter::stackElementSize) : 92 (frame::abi_minframe_size / Interpreter::stackElementSize); 93 const int size = 94 max_stack + 95 (callee_locals - callee_params) + 96 monitors * frame::interpreter_frame_monitor_size() + 97 max_alignment_space + 98 abi_scratch + 99 frame::ijava_state_size / Interpreter::stackElementSize; 100 101 // Fixed size of an interpreter frame, align to 16-byte. 102 return (size & -2); 103 } 104 105 // Fills a sceletal interpreter frame generated during deoptimizations. 106 // 107 // Parameters: 108 // 109 // interpreter_frame != NULL: 110 // set up the method, locals, and monitors. 111 // The frame interpreter_frame, if not NULL, is guaranteed to be the 112 // right size, as determined by a previous call to this method. 113 // It is also guaranteed to be walkable even though it is in a skeletal state 114 // 115 // is_top_frame == true: 116 // We're processing the *oldest* interpreter frame! 117 // 118 // pop_frame_extra_args: 119 // If this is != 0 we are returning to a deoptimized frame by popping 120 // off the callee frame. We want to re-execute the call that called the 121 // callee interpreted, but since the return to the interpreter would pop 122 // the arguments off advance the esp by dummy popframe_extra_args slots. 123 // Popping off those will establish the stack layout as it was before the call. 124 // 125 void AbstractInterpreter::layout_activation(Method* method, 126 int tempcount, 127 int popframe_extra_args, 128 int moncount, 129 int caller_actual_parameters, 130 int callee_param_count, 131 int callee_locals_count, 132 frame* caller, 133 frame* interpreter_frame, 134 bool is_top_frame, 135 bool is_bottom_frame) { 136 137 const int abi_scratch = is_top_frame ? (frame::abi_reg_args_size / Interpreter::stackElementSize) : 138 (frame::abi_minframe_size / Interpreter::stackElementSize); 139 140 intptr_t* locals_base = (caller->is_interpreted_frame()) ? 141 caller->interpreter_frame_esp() + caller_actual_parameters : 142 caller->sp() + method->max_locals() - 1 + (frame::abi_minframe_size / Interpreter::stackElementSize); 143 144 intptr_t* monitor_base = caller->sp() - frame::ijava_state_size / Interpreter::stackElementSize; 145 intptr_t* monitor = monitor_base - (moncount * frame::interpreter_frame_monitor_size()); 146 intptr_t* esp_base = monitor - 1; 147 intptr_t* esp = esp_base - tempcount - popframe_extra_args; 148 intptr_t* sp = (intptr_t *) (((intptr_t) (esp_base - callee_locals_count + callee_param_count - method->max_stack()- abi_scratch)) & -StackAlignmentInBytes); 149 intptr_t* sender_sp = caller->sp() + (frame::abi_minframe_size - frame::abi_reg_args_size) / Interpreter::stackElementSize; 150 intptr_t* top_frame_sp = is_top_frame ? sp : sp + (frame::abi_minframe_size - frame::abi_reg_args_size) / Interpreter::stackElementSize; 151 152 interpreter_frame->interpreter_frame_set_method(method); 153 interpreter_frame->interpreter_frame_set_locals(locals_base); 154 interpreter_frame->interpreter_frame_set_cpcache(method->constants()->cache()); 155 interpreter_frame->interpreter_frame_set_esp(esp); 156 interpreter_frame->interpreter_frame_set_monitor_end((BasicObjectLock *)monitor); 157 interpreter_frame->interpreter_frame_set_top_frame_sp(top_frame_sp); 158 if (!is_bottom_frame) { 159 interpreter_frame->interpreter_frame_set_sender_sp(sender_sp); 160 } 161 } 162 163 // Support abs and sqrt like in compiler. 164 // For others we can use a normal (native) entry. 165 166 bool TemplateInterpreter::math_entry_available(AbstractInterpreter::MethodKind kind) { 167 if (!InlineIntrinsics) return false; 168 169 return ((kind==Interpreter::java_lang_math_sqrt && VM_Version::has_fsqrt()) || 170 (kind==Interpreter::java_lang_math_abs)); 171 } 172 173