| /* |
| * Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2015 SAP SE. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "interpreter/interpreter.hpp" |
| #include "oops/constMethod.hpp" |
| #include "oops/method.hpp" |
| #include "runtime/frame.inline.hpp" |
| #include "utilities/debug.hpp" |
| #include "utilities/macros.hpp" |
| |
| int AbstractInterpreter::BasicType_as_index(BasicType type) { |
| int i = 0; |
| switch (type) { |
| case T_BOOLEAN: i = 0; break; |
| case T_CHAR : i = 1; break; |
| case T_BYTE : i = 2; break; |
| case T_SHORT : i = 3; break; |
| case T_INT : i = 4; break; |
| case T_LONG : i = 5; break; |
| case T_VOID : i = 6; break; |
| case T_FLOAT : i = 7; break; |
| case T_DOUBLE : i = 8; break; |
| case T_OBJECT : i = 9; break; |
| case T_ARRAY : i = 9; break; |
| default : ShouldNotReachHere(); |
| } |
| assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds"); |
| return i; |
| } |
| |
| // How much stack a method activation needs in stack slots. |
| // We must calc this exactly like in generate_fixed_frame. |
| // Note: This returns the conservative size assuming maximum alignment. |
| int AbstractInterpreter::size_top_interpreter_activation(Method* method) { |
| const int max_alignment_size = 2; |
| const int abi_scratch = frame::abi_reg_args_size; |
| return method->max_locals() + method->max_stack() + |
| frame::interpreter_frame_monitor_size() + max_alignment_size + abi_scratch; |
| } |
| |
| // Returns number of stackElementWords needed for the interpreter frame with the |
| // given sections. |
| // This overestimates the stack by one slot in case of alignments. |
| int AbstractInterpreter::size_activation(int max_stack, |
| int temps, |
| int extra_args, |
| int monitors, |
| int callee_params, |
| int callee_locals, |
| bool is_top_frame) { |
| // Note: This calculation must exactly parallel the frame setup |
| // in TemplateInterpreterGenerator::generate_fixed_frame. |
| assert(Interpreter::stackElementWords == 1, "sanity"); |
| const int max_alignment_space = StackAlignmentInBytes / Interpreter::stackElementSize; |
| const int abi_scratch = is_top_frame ? (frame::abi_reg_args_size / Interpreter::stackElementSize) : |
| (frame::abi_minframe_size / Interpreter::stackElementSize); |
| const int size = |
| max_stack + |
| (callee_locals - callee_params) + |
| monitors * frame::interpreter_frame_monitor_size() + |
| max_alignment_space + |
| abi_scratch + |
| frame::ijava_state_size / Interpreter::stackElementSize; |
| |
| // Fixed size of an interpreter frame, align to 16-byte. |
| return (size & -2); |
| } |
| |
| // Fills a sceletal interpreter frame generated during deoptimizations. |
| // |
| // Parameters: |
| // |
| // interpreter_frame != NULL: |
| // set up the method, locals, and monitors. |
| // The frame interpreter_frame, if not NULL, is guaranteed to be the |
| // right size, as determined by a previous call to this method. |
| // It is also guaranteed to be walkable even though it is in a skeletal state |
| // |
| // is_top_frame == true: |
| // We're processing the *oldest* interpreter frame! |
| // |
| // pop_frame_extra_args: |
| // If this is != 0 we are returning to a deoptimized frame by popping |
| // off the callee frame. We want to re-execute the call that called the |
| // callee interpreted, but since the return to the interpreter would pop |
| // the arguments off advance the esp by dummy popframe_extra_args slots. |
| // Popping off those will establish the stack layout as it was before the call. |
| // |
| void AbstractInterpreter::layout_activation(Method* method, |
| int tempcount, |
| int popframe_extra_args, |
| int moncount, |
| int caller_actual_parameters, |
| int callee_param_count, |
| int callee_locals_count, |
| frame* caller, |
| frame* interpreter_frame, |
| bool is_top_frame, |
| bool is_bottom_frame) { |
| |
| const int abi_scratch = is_top_frame ? (frame::abi_reg_args_size / Interpreter::stackElementSize) : |
| (frame::abi_minframe_size / Interpreter::stackElementSize); |
| |
| intptr_t* locals_base = (caller->is_interpreted_frame()) ? |
| caller->interpreter_frame_esp() + caller_actual_parameters : |
| caller->sp() + method->max_locals() - 1 + (frame::abi_minframe_size / Interpreter::stackElementSize); |
| |
| intptr_t* monitor_base = caller->sp() - frame::ijava_state_size / Interpreter::stackElementSize; |
| intptr_t* monitor = monitor_base - (moncount * frame::interpreter_frame_monitor_size()); |
| intptr_t* esp_base = monitor - 1; |
| intptr_t* esp = esp_base - tempcount - popframe_extra_args; |
| intptr_t* sp = (intptr_t *) (((intptr_t) (esp_base - callee_locals_count + callee_param_count - method->max_stack()- abi_scratch)) & -StackAlignmentInBytes); |
| intptr_t* sender_sp = caller->sp() + (frame::abi_minframe_size - frame::abi_reg_args_size) / Interpreter::stackElementSize; |
| intptr_t* top_frame_sp = is_top_frame ? sp : sp + (frame::abi_minframe_size - frame::abi_reg_args_size) / Interpreter::stackElementSize; |
| |
| interpreter_frame->interpreter_frame_set_method(method); |
| interpreter_frame->interpreter_frame_set_mirror(method->method_holder()->java_mirror()); |
| interpreter_frame->interpreter_frame_set_locals(locals_base); |
| interpreter_frame->interpreter_frame_set_cpcache(method->constants()->cache()); |
| interpreter_frame->interpreter_frame_set_esp(esp); |
| interpreter_frame->interpreter_frame_set_monitor_end((BasicObjectLock *)monitor); |
| interpreter_frame->interpreter_frame_set_top_frame_sp(top_frame_sp); |
| if (!is_bottom_frame) { |
| interpreter_frame->interpreter_frame_set_sender_sp(sender_sp); |
| } |
| } |