/*
* 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.
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*/
#include "precompiled.hpp"
#include "interpreter/interpreter.hpp"
#include "oops/constMethod.hpp"
#include "oops/klass.inline.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;
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