jdk

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/*
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 * Copyright (c) 1999, 2023, Oracle and/or its affiliates. All rights reserved.
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 * Copyright (c) 2014, Red Hat Inc. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "asm/macroAssembler.inline.hpp"
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#include "c1/c1_CodeStubs.hpp"
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#include "c1/c1_FrameMap.hpp"
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#include "c1/c1_LIRAssembler.hpp"
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#include "c1/c1_MacroAssembler.hpp"
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#include "c1/c1_Runtime1.hpp"
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#include "classfile/javaClasses.hpp"
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#include "nativeInst_aarch64.hpp"
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#include "runtime/sharedRuntime.hpp"
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#include "vmreg_aarch64.inline.hpp"
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#define __ ce->masm()->
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void C1SafepointPollStub::emit_code(LIR_Assembler* ce) {
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  __ bind(_entry);
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  InternalAddress safepoint_pc(ce->masm()->pc() - ce->masm()->offset() + safepoint_offset());
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  __ adr(rscratch1, safepoint_pc);
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  __ str(rscratch1, Address(rthread, JavaThread::saved_exception_pc_offset()));
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  assert(SharedRuntime::polling_page_return_handler_blob() != nullptr,
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         "polling page return stub not created yet");
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  address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point();
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  __ far_jump(RuntimeAddress(stub));
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}
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void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
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  __ bind(_entry);
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  Metadata *m = _method->as_constant_ptr()->as_metadata();
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  __ mov_metadata(rscratch1, m);
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  ce->store_parameter(rscratch1, 1);
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  ce->store_parameter(_bci, 0);
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  __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id)));
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  ce->add_call_info_here(_info);
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  ce->verify_oop_map(_info);
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  __ b(_continuation);
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}
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void RangeCheckStub::emit_code(LIR_Assembler* ce) {
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  __ bind(_entry);
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  if (_info->deoptimize_on_exception()) {
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    address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
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    __ far_call(RuntimeAddress(a));
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    ce->add_call_info_here(_info);
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    ce->verify_oop_map(_info);
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    debug_only(__ should_not_reach_here());
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    return;
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  }
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  if (_index->is_cpu_register()) {
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    __ mov(rscratch1, _index->as_register());
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  } else {
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    __ mov(rscratch1, _index->as_jint());
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  }
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  Runtime1::StubID stub_id;
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  if (_throw_index_out_of_bounds_exception) {
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    stub_id = Runtime1::throw_index_exception_id;
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  } else {
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    assert(_array != LIR_Opr::nullOpr(), "sanity");
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    __ mov(rscratch2, _array->as_pointer_register());
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    stub_id = Runtime1::throw_range_check_failed_id;
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  }
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  __ lea(lr, RuntimeAddress(Runtime1::entry_for(stub_id)));
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  __ blr(lr);
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  ce->add_call_info_here(_info);
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  ce->verify_oop_map(_info);
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  debug_only(__ should_not_reach_here());
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}
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PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
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  _info = new CodeEmitInfo(info);
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}
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void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
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  __ bind(_entry);
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  address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
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  __ far_call(RuntimeAddress(a));
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  ce->add_call_info_here(_info);
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  ce->verify_oop_map(_info);
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  debug_only(__ should_not_reach_here());
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}
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void DivByZeroStub::emit_code(LIR_Assembler* ce) {
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  if (_offset != -1) {
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    ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
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  }
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  __ bind(_entry);
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  __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_div0_exception_id)));
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  ce->add_call_info_here(_info);
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  ce->verify_oop_map(_info);
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#ifdef ASSERT
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  __ should_not_reach_here();
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#endif
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}
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// Implementation of NewInstanceStub
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NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
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  _result = result;
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  _klass = klass;
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  _klass_reg = klass_reg;
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  _info = new CodeEmitInfo(info);
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  assert(stub_id == Runtime1::new_instance_id                 ||
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         stub_id == Runtime1::fast_new_instance_id            ||
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         stub_id == Runtime1::fast_new_instance_init_check_id,
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         "need new_instance id");
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  _stub_id   = stub_id;
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}
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void NewInstanceStub::emit_code(LIR_Assembler* ce) {
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  assert(__ rsp_offset() == 0, "frame size should be fixed");
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  __ bind(_entry);
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  __ mov(r3, _klass_reg->as_register());
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  __ far_call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
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  ce->add_call_info_here(_info);
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  ce->verify_oop_map(_info);
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  assert(_result->as_register() == r0, "result must in r0,");
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  __ b(_continuation);
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}
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// Implementation of NewTypeArrayStub
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// Implementation of NewTypeArrayStub
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NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
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  _klass_reg = klass_reg;
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  _length = length;
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  _result = result;
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  _info = new CodeEmitInfo(info);
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}
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void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
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  assert(__ rsp_offset() == 0, "frame size should be fixed");
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  __ bind(_entry);
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  assert(_length->as_register() == r19, "length must in r19,");
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  assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
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  __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
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  ce->add_call_info_here(_info);
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  ce->verify_oop_map(_info);
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  assert(_result->as_register() == r0, "result must in r0");
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  __ b(_continuation);
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}
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// Implementation of NewObjectArrayStub
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NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
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  _klass_reg = klass_reg;
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  _result = result;
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  _length = length;
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  _info = new CodeEmitInfo(info);
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}
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void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
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  assert(__ rsp_offset() == 0, "frame size should be fixed");
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  __ bind(_entry);
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  assert(_length->as_register() == r19, "length must in r19,");
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  assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
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  __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
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  ce->add_call_info_here(_info);
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  ce->verify_oop_map(_info);
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  assert(_result->as_register() == r0, "result must in r0");
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  __ b(_continuation);
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}
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void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
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  assert(__ rsp_offset() == 0, "frame size should be fixed");
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  __ bind(_entry);
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  ce->store_parameter(_obj_reg->as_register(),  1);
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  ce->store_parameter(_lock_reg->as_register(), 0);
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  Runtime1::StubID enter_id;
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  if (ce->compilation()->has_fpu_code()) {
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    enter_id = Runtime1::monitorenter_id;
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  } else {
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    enter_id = Runtime1::monitorenter_nofpu_id;
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  }
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  __ far_call(RuntimeAddress(Runtime1::entry_for(enter_id)));
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  ce->add_call_info_here(_info);
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  ce->verify_oop_map(_info);
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  __ b(_continuation);
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}
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void MonitorExitStub::emit_code(LIR_Assembler* ce) {
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  __ bind(_entry);
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  if (_compute_lock) {
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    // lock_reg was destroyed by fast unlocking attempt => recompute it
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    ce->monitor_address(_monitor_ix, _lock_reg);
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  }
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  ce->store_parameter(_lock_reg->as_register(), 0);
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  // note: non-blocking leaf routine => no call info needed
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  Runtime1::StubID exit_id;
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  if (ce->compilation()->has_fpu_code()) {
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    exit_id = Runtime1::monitorexit_id;
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  } else {
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    exit_id = Runtime1::monitorexit_nofpu_id;
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  }
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  __ adr(lr, _continuation);
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  __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));
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}
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// Implementation of patching:
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// - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
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// - Replace original code with a call to the stub
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// At Runtime:
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// - call to stub, jump to runtime
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// - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
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// - in runtime: after initializing class, restore original code, reexecute instruction
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int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
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void PatchingStub::align_patch_site(MacroAssembler* masm) {
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}
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void PatchingStub::emit_code(LIR_Assembler* ce) {
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  assert(false, "AArch64 should not use C1 runtime patching");
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}
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void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
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  __ bind(_entry);
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  ce->store_parameter(_trap_request, 0);
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  __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
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  ce->add_call_info_here(_info);
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  DEBUG_ONLY(__ should_not_reach_here());
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}
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void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
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  address a;
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  if (_info->deoptimize_on_exception()) {
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    // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
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    a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
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  } else {
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    a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
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  }
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  ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
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  __ bind(_entry);
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  __ far_call(RuntimeAddress(a));
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  ce->add_call_info_here(_info);
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  ce->verify_oop_map(_info);
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  debug_only(__ should_not_reach_here());
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}
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void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
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  assert(__ rsp_offset() == 0, "frame size should be fixed");
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  __ bind(_entry);
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  // pass the object in a scratch register because all other registers
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  // must be preserved
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  if (_obj->is_cpu_register()) {
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    __ mov(rscratch1, _obj->as_register());
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  }
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  __ far_call(RuntimeAddress(Runtime1::entry_for(_stub)), rscratch2);
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  ce->add_call_info_here(_info);
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  debug_only(__ should_not_reach_here());
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}
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void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
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  //---------------slow case: call to native-----------------
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  __ bind(_entry);
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  // Figure out where the args should go
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  // This should really convert the IntrinsicID to the Method* and signature
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  // but I don't know how to do that.
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  //
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  VMRegPair args[5];
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  BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
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  SharedRuntime::java_calling_convention(signature, args, 5);
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  // push parameters
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  // (src, src_pos, dest, destPos, length)
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  Register r[5];
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  r[0] = src()->as_register();
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  r[1] = src_pos()->as_register();
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  r[2] = dst()->as_register();
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  r[3] = dst_pos()->as_register();
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  r[4] = length()->as_register();
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  // next registers will get stored on the stack
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  for (int i = 0; i < 5 ; i++ ) {
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    VMReg r_1 = args[i].first();
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    if (r_1->is_stack()) {
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      int st_off = r_1->reg2stack() * wordSize;
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      __ str (r[i], Address(sp, st_off));
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    } else {
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      assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
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    }
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  }
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  ce->align_call(lir_static_call);
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  ce->emit_static_call_stub();
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  if (ce->compilation()->bailed_out()) {
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    return; // CodeCache is full
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  }
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  Address resolve(SharedRuntime::get_resolve_static_call_stub(),
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                  relocInfo::static_call_type);
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  address call = __ trampoline_call(resolve);
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  if (call == nullptr) {
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    ce->bailout("trampoline stub overflow");
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    return;
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  }
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  ce->add_call_info_here(info());
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#ifndef PRODUCT
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  if (PrintC1Statistics) {
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    __ lea(rscratch2, ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
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    __ incrementw(Address(rscratch2));
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  }
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#endif
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  __ b(_continuation);
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}
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#undef __
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