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| 1 | +/* |
| 2 | + * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved. |
| 3 | + * Copyright (c) 2014, Red Hat Inc. All rights reserved. |
| 4 | + * Copyright (c) 2020, 2022, Huawei Technologies Co., Ltd. All rights reserved. |
| 5 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 6 | + * |
| 7 | + * This code is free software; you can redistribute it and/or modify it |
| 8 | + * under the terms of the GNU General Public License version 2 only, as |
| 9 | + * published by the Free Software Foundation. |
| 10 | + * |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | + * accompanied this code). |
| 16 | + * |
| 17 | + * You should have received a copy of the GNU General Public License version |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | + * |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 22 | + * or visit www.oracle.com if you need additional information or have any |
| 23 | + * questions. |
| 24 | + * |
| 25 | + */ |
| 26 | + |
| 27 | +#include "precompiled.hpp" |
| 28 | +#include "interpreter/interpreter.hpp" |
| 29 | +#include "oops/constMethod.hpp" |
| 30 | +#include "oops/klass.inline.hpp" |
| 31 | +#include "oops/method.hpp" |
| 32 | +#include "runtime/frame.inline.hpp" |
| 33 | +#include "utilities/align.hpp" |
| 34 | +#include "utilities/debug.hpp" |
| 35 | +#include "utilities/macros.hpp" |
| 36 | + |
| 37 | +int AbstractInterpreter::BasicType_as_index(BasicType type) { |
| 38 | + int i = 0; |
| 39 | + switch (type) { |
| 40 | + case T_BOOLEAN: i = 0; break; |
| 41 | + case T_CHAR : i = 1; break; |
| 42 | + case T_BYTE : i = 2; break; |
| 43 | + case T_SHORT : i = 3; break; |
| 44 | + case T_INT : i = 4; break; |
| 45 | + case T_LONG : i = 5; break; |
| 46 | + case T_VOID : i = 6; break; |
| 47 | + case T_FLOAT : i = 7; break; |
| 48 | + case T_DOUBLE : i = 8; break; |
| 49 | + case T_OBJECT : i = 9; break; |
| 50 | + case T_ARRAY : i = 9; break; |
| 51 | + default : ShouldNotReachHere(); |
| 52 | + } |
| 53 | + assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, |
| 54 | + "index out of bounds"); |
| 55 | + return i; |
| 56 | +} |
| 57 | + |
| 58 | +// How much stack a method activation needs in words. |
| 59 | +int AbstractInterpreter::size_top_interpreter_activation(Method* method) { |
| 60 | + const int entry_size = frame::interpreter_frame_monitor_size(); |
| 61 | + |
| 62 | + // total overhead size: entry_size + (saved fp thru expr stack |
| 63 | + // bottom). be sure to change this if you add/subtract anything |
| 64 | + // to/from the overhead area |
| 65 | + const int overhead_size = |
| 66 | + -(frame::interpreter_frame_initial_sp_offset) + entry_size; |
| 67 | + |
| 68 | + const int stub_code = frame::entry_frame_after_call_words; |
| 69 | + assert_cond(method != NULL); |
| 70 | + const int method_stack = (method->max_locals() + method->max_stack()) * |
| 71 | + Interpreter::stackElementWords; |
| 72 | + return (overhead_size + method_stack + stub_code); |
| 73 | +} |
| 74 | + |
| 75 | +// asm based interpreter deoptimization helpers |
| 76 | +int AbstractInterpreter::size_activation(int max_stack, |
| 77 | + int temps, |
| 78 | + int extra_args, |
| 79 | + int monitors, |
| 80 | + int callee_params, |
| 81 | + int callee_locals, |
| 82 | + bool is_top_frame) { |
| 83 | + // Note: This calculation must exactly parallel the frame setup |
| 84 | + // in TemplateInterpreterGenerator::generate_method_entry. |
| 85 | + |
| 86 | + // fixed size of an interpreter frame: |
| 87 | + int overhead = frame::sender_sp_offset - |
| 88 | + frame::interpreter_frame_initial_sp_offset; |
| 89 | + // Our locals were accounted for by the caller (or last_frame_adjust |
| 90 | + // on the transistion) Since the callee parameters already account |
| 91 | + // for the callee's params we only need to account for the extra |
| 92 | + // locals. |
| 93 | + int size = overhead + |
| 94 | + (callee_locals - callee_params) + |
| 95 | + monitors * frame::interpreter_frame_monitor_size() + |
| 96 | + // On the top frame, at all times SP <= ESP, and SP is |
| 97 | + // 16-aligned. We ensure this by adjusting SP on method |
| 98 | + // entry and re-entry to allow room for the maximum size of |
| 99 | + // the expression stack. When we call another method we bump |
| 100 | + // SP so that no stack space is wasted. So, only on the top |
| 101 | + // frame do we need to allow max_stack words. |
| 102 | + (is_top_frame ? max_stack : temps + extra_args); |
| 103 | + |
| 104 | + // On riscv we always keep the stack pointer 16-aligned, so we |
| 105 | + // must round up here. |
| 106 | + size = align_up(size, 2); |
| 107 | + |
| 108 | + return size; |
| 109 | +} |
| 110 | + |
| 111 | +void AbstractInterpreter::layout_activation(Method* method, |
| 112 | + int tempcount, |
| 113 | + int popframe_extra_args, |
| 114 | + int moncount, |
| 115 | + int caller_actual_parameters, |
| 116 | + int callee_param_count, |
| 117 | + int callee_locals, |
| 118 | + frame* caller, |
| 119 | + frame* interpreter_frame, |
| 120 | + bool is_top_frame, |
| 121 | + bool is_bottom_frame) { |
| 122 | + // The frame interpreter_frame is guaranteed to be the right size, |
| 123 | + // as determined by a previous call to the size_activation() method. |
| 124 | + // It is also guaranteed to be walkable even though it is in a |
| 125 | + // skeletal state |
| 126 | + assert_cond(method != NULL && caller != NULL && interpreter_frame != NULL); |
| 127 | + int max_locals = method->max_locals() * Interpreter::stackElementWords; |
| 128 | + int extra_locals = (method->max_locals() - method->size_of_parameters()) * |
| 129 | + Interpreter::stackElementWords; |
| 130 | + |
| 131 | +#ifdef ASSERT |
| 132 | + assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable"); |
| 133 | +#endif |
| 134 | + |
| 135 | + interpreter_frame->interpreter_frame_set_method(method); |
| 136 | + // NOTE the difference in using sender_sp and interpreter_frame_sender_sp |
| 137 | + // interpreter_frame_sender_sp is the original sp of the caller (the unextended_sp) |
| 138 | + // and sender_sp is fp |
| 139 | + intptr_t* locals = NULL; |
| 140 | + if (caller->is_interpreted_frame()) { |
| 141 | + locals = caller->interpreter_frame_last_sp() + caller_actual_parameters - 1; |
| 142 | + } else { |
| 143 | + locals = interpreter_frame->sender_sp() + max_locals - 1; |
| 144 | + } |
| 145 | + |
| 146 | +#ifdef ASSERT |
| 147 | + if (caller->is_interpreted_frame()) { |
| 148 | + assert(locals < caller->fp() + frame::interpreter_frame_initial_sp_offset, "bad placement"); |
| 149 | + } |
| 150 | +#endif |
| 151 | + |
| 152 | + interpreter_frame->interpreter_frame_set_locals(locals); |
| 153 | + BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin(); |
| 154 | + BasicObjectLock* monbot = montop - moncount; |
| 155 | + interpreter_frame->interpreter_frame_set_monitor_end(monbot); |
| 156 | + |
| 157 | + // Set last_sp |
| 158 | + intptr_t* last_sp = (intptr_t*) monbot - |
| 159 | + tempcount*Interpreter::stackElementWords - |
| 160 | + popframe_extra_args; |
| 161 | + interpreter_frame->interpreter_frame_set_last_sp(last_sp); |
| 162 | + |
| 163 | + // All frames but the initial (oldest) interpreter frame we fill in have |
| 164 | + // a value for sender_sp that allows walking the stack but isn't |
| 165 | + // truly correct. Correct the value here. |
| 166 | + if (extra_locals != 0 && |
| 167 | + interpreter_frame->sender_sp() == |
| 168 | + interpreter_frame->interpreter_frame_sender_sp()) { |
| 169 | + interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() + |
| 170 | + extra_locals); |
| 171 | + } |
| 172 | + |
| 173 | + *interpreter_frame->interpreter_frame_cache_addr() = |
| 174 | + method->constants()->cache(); |
| 175 | + *interpreter_frame->interpreter_frame_mirror_addr() = |
| 176 | + method->method_holder()->java_mirror(); |
| 177 | +} |
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