| /* |
| * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2016 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 top interpreter activation needs in words. |
| int AbstractInterpreter::size_top_interpreter_activation(Method* method) { |
| |
| // We have to size the following 2 frames: |
| // |
| // [TOP_IJAVA_FRAME_ABI] |
| // [ENTRY_FRAME] |
| // |
| // This expands to (see frame_s390.hpp): |
| // |
| // [TOP_IJAVA_FRAME_ABI] |
| // [operand stack] > stack |
| // [monitors] (optional) > monitors |
| // [IJAVA_STATE] > interpreter_state |
| // [PARENT_IJAVA_FRAME_ABI] |
| // [callee's locals w/o arguments] \ locals |
| // [outgoing arguments] / |
| // [ENTRY_FRAME_LOCALS] |
| |
| int locals = method->max_locals() * BytesPerWord; |
| int interpreter_state = frame::z_ijava_state_size; |
| |
| int stack = method->max_stack() * BytesPerWord; |
| int monitors = method->is_synchronized() ? frame::interpreter_frame_monitor_size_in_bytes() : 0; |
| |
| int total_bytes = |
| frame::z_top_ijava_frame_abi_size + |
| stack + |
| monitors + |
| interpreter_state + |
| frame::z_parent_ijava_frame_abi_size + |
| locals + |
| frame::z_entry_frame_locals_size; |
| |
| return (total_bytes/BytesPerWord); |
| } |
| |
| // 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 AbstractInterpreterGenerator::generate_method_entry. |
| |
| assert((Interpreter::stackElementSize == frame::alignment_in_bytes), "must align frame size"); |
| const int abi_scratch = is_top_frame ? (frame::z_top_ijava_frame_abi_size / Interpreter::stackElementSize) : |
| (frame::z_parent_ijava_frame_abi_size / Interpreter::stackElementSize); |
| |
| const int size = |
| max_stack + |
| (callee_locals - callee_params) + // Already counted in max_stack(). |
| monitors * frame::interpreter_frame_monitor_size() + |
| abi_scratch + |
| frame::z_ijava_state_size / Interpreter::stackElementSize; |
| |
| // Fixed size of an interpreter frame. |
| return size; |
| } |
| |
| // 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) { |
| // TOP_IJAVA_FRAME: |
| // |
| // 0 [TOP_IJAVA_FRAME_ABI] -+ |
| // 16 [operand stack] | size |
| // [monitors] (optional) | |
| // [IJAVA_STATE] -+ |
| // Note: own locals are located in the caller frame. |
| // |
| // PARENT_IJAVA_FRAME: |
| // |
| // 0 [PARENT_IJAVA_FRAME_ABI] -+ |
| // [callee's locals w/o arguments] | |
| // [outgoing arguments] | size |
| // [used part of operand stack w/o arguments] | |
| // [monitors] (optional) | |
| // [IJAVA_STATE] -+ |
| // |
| |
| // Now we know our caller, calc the exact frame layout and size |
| // z_ijava_state->locals - i*BytesPerWord points to i-th Java local (i starts at 0). |
| intptr_t* locals_base = (caller->is_interpreted_frame()) |
| ? (caller->interpreter_frame_tos_address() + caller_actual_parameters - 1) |
| : (caller->sp() + method->max_locals() - 1 + |
| frame::z_parent_ijava_frame_abi_size / Interpreter::stackElementSize); |
| |
| intptr_t* monitor_base = (intptr_t*)((address)interpreter_frame->fp() - frame::z_ijava_state_size); |
| intptr_t* monitor = monitor_base - (moncount * frame::interpreter_frame_monitor_size()); |
| intptr_t* operand_stack_base = monitor; |
| intptr_t* tos = operand_stack_base - tempcount - popframe_extra_args; |
| intptr_t* top_frame_sp = |
| operand_stack_base - method->max_stack() - frame::z_top_ijava_frame_abi_size / Interpreter::stackElementSize; |
| intptr_t* sender_sp; |
| if (caller->is_interpreted_frame()) { |
| sender_sp = caller->interpreter_frame_top_frame_sp(); |
| } else if (caller->is_compiled_frame()) { |
| sender_sp = caller->fp() - caller->cb()->frame_size(); |
| // The bottom frame's sender_sp is its caller's unextended_sp. |
| // It was already set when its skeleton was pushed (see push_skeleton_frames()). |
| // Note: the unextended_sp is required by nmethod::orig_pc_addr(). |
| assert(is_bottom_frame && (sender_sp == caller->unextended_sp()), |
| "must initialize sender_sp of bottom skeleton frame when pushing it"); |
| } else { |
| assert(caller->is_entry_frame(), "is there a new frame type??"); |
| sender_sp = caller->sp(); // Call_stub only uses it's fp. |
| } |
| |
| 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_monitor_end((BasicObjectLock *)monitor); |
| *interpreter_frame->interpreter_frame_cache_addr() = method->constants()->cache(); |
| interpreter_frame->interpreter_frame_set_tos_address(tos); |
| interpreter_frame->interpreter_frame_set_sender_sp(sender_sp); |
| interpreter_frame->interpreter_frame_set_top_frame_sp(top_frame_sp); |
| } |