author | herrick |
Thu, 17 Oct 2019 07:55:35 -0400 | |
branch | JDK-8200758-branch |
changeset 58670 | 6fb9e12d5595 |
parent 51397 | c9150700bbd0 |
permissions | -rw-r--r-- |
42065 | 1 |
/* |
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* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. |
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* Copyright (c) 2016, 2018 SAP SE. 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 "nativeInst_s390.hpp" |
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#include "runtime/sharedRuntime.hpp" |
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#include "utilities/align.hpp" |
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#include "utilities/macros.hpp" |
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#include "vmreg_s390.inline.hpp" |
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#define __ ce->masm()-> |
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#undef CHECK_BAILOUT |
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#define CHECK_BAILOUT() { if (ce->compilation()->bailed_out()) return; } |
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||
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RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, LIR_Opr array) |
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: _index(index), _array(array), _throw_index_out_of_bounds_exception(false) { |
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assert(info != NULL, "must have info"); |
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_info = new CodeEmitInfo(info); |
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} |
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RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index) |
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: _index(index), _array(NULL), _throw_index_out_of_bounds_exception(true) { |
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assert(info != NULL, "must have info"); |
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_info = new CodeEmitInfo(info); |
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} |
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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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ce->emit_call_c(a); |
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CHECK_BAILOUT(); |
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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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// Pass the array index in Z_R1_scratch which is not managed by linear scan. |
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if (_index->is_cpu_register()) { |
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__ lgr_if_needed(Z_R1_scratch, _index->as_register()); |
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} else { |
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__ load_const_optimized(Z_R1_scratch, _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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stub_id = Runtime1::throw_range_check_failed_id; |
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__ lgr_if_needed(Z_R0_scratch, _array->as_pointer_register()); |
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} |
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ce->emit_call_c(Runtime1::entry_for (stub_id)); |
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CHECK_BAILOUT(); |
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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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ce->emit_call_c(a); |
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CHECK_BAILOUT(); |
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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 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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bool success = __ set_metadata_constant(m, Z_R1_scratch); |
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if (!success) { |
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ce->compilation()->bailout("const section overflow"); |
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return; |
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} |
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ce->store_parameter(/*_method->as_register()*/ Z_R1_scratch, 1); |
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ce->store_parameter(_bci, 0); |
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ce->emit_call_c(Runtime1::entry_for (Runtime1::counter_overflow_id)); |
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CHECK_BAILOUT(); |
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ce->add_call_info_here(_info); |
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ce->verify_oop_map(_info); |
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__ branch_optimized(Assembler::bcondAlways, _continuation); |
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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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ce->emit_call_c(Runtime1::entry_for (Runtime1::throw_div0_exception_id)); |
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CHECK_BAILOUT(); |
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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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ce->emit_call_c(a); |
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CHECK_BAILOUT(); |
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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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// Note: pass object in Z_R1_scratch |
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void SimpleExceptionStub::emit_code(LIR_Assembler* ce) { |
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__ bind(_entry); |
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if (_obj->is_valid()) { |
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__ z_lgr(Z_R1_scratch, _obj->as_register()); // _obj contains the optional argument to the stub |
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} |
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address a = Runtime1::entry_for (_stub); |
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ce->emit_call_c(a); |
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CHECK_BAILOUT(); |
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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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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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__ bind(_entry); |
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assert(_klass_reg->as_register() == Z_R11, "call target expects klass in Z_R11"); |
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address a = Runtime1::entry_for (_stub_id); |
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ce->emit_call_c(a); |
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CHECK_BAILOUT(); |
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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() == Z_R2, "callee returns result in Z_R2,"); |
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__ z_brul(_continuation); |
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} |
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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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__ bind(_entry); |
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assert(_klass_reg->as_register() == Z_R11, "call target expects klass in Z_R11"); |
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__ lgr_if_needed(Z_R13, _length->as_register()); |
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address a = Runtime1::entry_for (Runtime1::new_type_array_id); |
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ce->emit_call_c(a); |
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CHECK_BAILOUT(); |
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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() == Z_R2, "callee returns result in Z_R2,"); |
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__ z_brul(_continuation); |
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} |
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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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_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 NewObjectArrayStub::emit_code(LIR_Assembler* ce) { |
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__ bind(_entry); |
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assert(_klass_reg->as_register() == Z_R11, "call target expects klass in Z_R11"); |
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__ lgr_if_needed(Z_R13, _length->as_register()); |
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address a = Runtime1::entry_for (Runtime1::new_object_array_id); |
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ce->emit_call_c(a); |
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CHECK_BAILOUT(); |
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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() == Z_R2, "callee returns result in Z_R2,"); |
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__ z_brul(_continuation); |
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} |
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MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info) |
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: MonitorAccessStub(obj_reg, lock_reg) { |
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_info = new CodeEmitInfo(info); |
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} |
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void MonitorEnterStub::emit_code(LIR_Assembler* ce) { |
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__ bind(_entry); |
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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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__ lgr_if_needed(Z_R1_scratch, _obj_reg->as_register()); |
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__ lgr_if_needed(Z_R13, _lock_reg->as_register()); // See LIRGenerator::syncTempOpr(). |
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ce->emit_call_c(Runtime1::entry_for (enter_id)); |
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CHECK_BAILOUT(); |
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ce->add_call_info_here(_info); |
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ce->verify_oop_map(_info); |
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__ branch_optimized(Assembler::bcondAlways, _continuation); |
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} |
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246 |
||
247 |
void MonitorExitStub::emit_code(LIR_Assembler* ce) { |
|
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__ bind(_entry); |
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// Move address of the BasicObjectLock into Z_R1_scratch. |
|
250 |
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, FrameMap::as_opr(Z_R1_scratch)); |
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} else { |
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__ lgr_if_needed(Z_R1_scratch, _lock_reg->as_register()); |
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255 |
} |
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// Note: non-blocking leaf routine => no call info needed. |
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257 |
Runtime1::StubID exit_id; |
|
258 |
if (ce->compilation()->has_fpu_code()) { |
|
259 |
exit_id = Runtime1::monitorexit_id; |
|
260 |
} else { |
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261 |
exit_id = Runtime1::monitorexit_nofpu_id; |
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262 |
} |
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263 |
ce->emit_call_c(Runtime1::entry_for (exit_id)); |
|
264 |
CHECK_BAILOUT(); |
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265 |
__ branch_optimized(Assembler::bcondAlways, _continuation); |
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266 |
} |
|
267 |
||
268 |
// Implementation of patching: |
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269 |
// - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes). |
|
270 |
// - Replace original code with a call to the stub. |
|
271 |
// At Runtime: |
|
272 |
// - call to stub, jump to runtime. |
|
273 |
// - in runtime: Preserve all registers (especially objects, i.e., source and destination object). |
|
274 |
// - in runtime: After initializing class, restore original code, reexecute instruction. |
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275 |
||
276 |
int PatchingStub::_patch_info_offset = - (12 /* load const */ + 2 /*BASR*/); |
|
277 |
||
278 |
void PatchingStub::align_patch_site(MacroAssembler* masm) { |
|
279 |
#ifndef PRODUCT |
|
280 |
const char* bc; |
|
281 |
switch (_id) { |
|
282 |
case access_field_id: bc = "patch site (access_field)"; break; |
|
283 |
case load_klass_id: bc = "patch site (load_klass)"; break; |
|
284 |
case load_mirror_id: bc = "patch site (load_mirror)"; break; |
|
285 |
case load_appendix_id: bc = "patch site (load_appendix)"; break; |
|
286 |
default: bc = "patch site (unknown patch id)"; break; |
|
287 |
} |
|
288 |
masm->block_comment(bc); |
|
289 |
#endif |
|
290 |
||
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masm->align(align_up((int)NativeGeneralJump::instruction_size, wordSize)); |
42065 | 292 |
} |
293 |
||
294 |
void PatchingStub::emit_code(LIR_Assembler* ce) { |
|
295 |
// Copy original code here. |
|
296 |
assert(NativeGeneralJump::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, |
|
297 |
"not enough room for call"); |
|
298 |
||
299 |
NearLabel call_patch; |
|
300 |
||
301 |
int being_initialized_entry = __ offset(); |
|
302 |
||
303 |
if (_id == load_klass_id) { |
|
304 |
// Produce a copy of the load klass instruction for use by the case being initialized. |
|
305 |
#ifdef ASSERT |
|
306 |
address start = __ pc(); |
|
307 |
#endif |
|
308 |
AddressLiteral addrlit((intptr_t)0, metadata_Relocation::spec(_index)); |
|
309 |
__ load_const(_obj, addrlit); |
|
310 |
||
311 |
#ifdef ASSERT |
|
312 |
for (int i = 0; i < _bytes_to_copy; i++) { |
|
313 |
address ptr = (address)(_pc_start + i); |
|
314 |
int a_byte = (*ptr) & 0xFF; |
|
315 |
assert(a_byte == *start++, "should be the same code"); |
|
316 |
} |
|
317 |
#endif |
|
318 |
} else if (_id == load_mirror_id || _id == load_appendix_id) { |
|
319 |
// Produce a copy of the load mirror instruction for use by the case being initialized. |
|
320 |
#ifdef ASSERT |
|
321 |
address start = __ pc(); |
|
322 |
#endif |
|
323 |
AddressLiteral addrlit((intptr_t)0, oop_Relocation::spec(_index)); |
|
324 |
__ load_const(_obj, addrlit); |
|
325 |
||
326 |
#ifdef ASSERT |
|
327 |
for (int i = 0; i < _bytes_to_copy; i++) { |
|
328 |
address ptr = (address)(_pc_start + i); |
|
329 |
int a_byte = (*ptr) & 0xFF; |
|
330 |
assert(a_byte == *start++, "should be the same code"); |
|
331 |
} |
|
332 |
#endif |
|
333 |
} else { |
|
334 |
// Make a copy the code which is going to be patched. |
|
335 |
for (int i = 0; i < _bytes_to_copy; i++) { |
|
336 |
address ptr = (address)(_pc_start + i); |
|
337 |
int a_byte = (*ptr) & 0xFF; |
|
338 |
__ emit_int8 (a_byte); |
|
339 |
} |
|
340 |
} |
|
341 |
||
342 |
address end_of_patch = __ pc(); |
|
343 |
int bytes_to_skip = 0; |
|
344 |
if (_id == load_mirror_id) { |
|
345 |
int offset = __ offset(); |
|
346 |
if (CommentedAssembly) { |
|
347 |
__ block_comment(" being_initialized check"); |
|
348 |
} |
|
349 |
||
350 |
// Static field accesses have special semantics while the class |
|
351 |
// initializer is being run, so we emit a test which can be used to |
|
352 |
// check that this code is being executed by the initializing |
|
353 |
// thread. |
|
354 |
assert(_obj != noreg, "must be a valid register"); |
|
355 |
assert(_index >= 0, "must have oop index"); |
|
356 |
__ z_lg(Z_R1_scratch, java_lang_Class::klass_offset_in_bytes(), _obj); |
|
357 |
__ z_cg(Z_thread, Address(Z_R1_scratch, InstanceKlass::init_thread_offset())); |
|
358 |
__ branch_optimized(Assembler::bcondNotEqual, call_patch); |
|
359 |
||
360 |
// Load_klass patches may execute the patched code before it's |
|
361 |
// copied back into place so we need to jump back into the main |
|
362 |
// code of the nmethod to continue execution. |
|
363 |
__ branch_optimized(Assembler::bcondAlways, _patch_site_continuation); |
|
364 |
||
365 |
// Make sure this extra code gets skipped. |
|
366 |
bytes_to_skip += __ offset() - offset; |
|
367 |
} |
|
368 |
||
369 |
// Now emit the patch record telling the runtime how to find the |
|
370 |
// pieces of the patch. We only need 3 bytes but to help the disassembler |
|
371 |
// we make the data look like a the following add instruction: |
|
372 |
// A R1, D2(X2, B2) |
|
373 |
// which requires 4 bytes. |
|
374 |
int sizeof_patch_record = 4; |
|
375 |
bytes_to_skip += sizeof_patch_record; |
|
376 |
||
377 |
// Emit the offsets needed to find the code to patch. |
|
378 |
int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record; |
|
379 |
||
380 |
// Emit the patch record: opcode of the add followed by 3 bytes patch record data. |
|
381 |
__ emit_int8((int8_t)(A_ZOPC>>24)); |
|
382 |
__ emit_int8(being_initialized_entry_offset); |
|
383 |
__ emit_int8(bytes_to_skip); |
|
384 |
__ emit_int8(_bytes_to_copy); |
|
385 |
address patch_info_pc = __ pc(); |
|
386 |
assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info"); |
|
387 |
||
388 |
address entry = __ pc(); |
|
389 |
NativeGeneralJump::insert_unconditional((address)_pc_start, entry); |
|
390 |
address target = NULL; |
|
391 |
relocInfo::relocType reloc_type = relocInfo::none; |
|
392 |
switch (_id) { |
|
393 |
case access_field_id: target = Runtime1::entry_for (Runtime1::access_field_patching_id); break; |
|
394 |
case load_klass_id: target = Runtime1::entry_for (Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break; |
|
395 |
case load_mirror_id: target = Runtime1::entry_for (Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break; |
|
396 |
case load_appendix_id: target = Runtime1::entry_for (Runtime1::load_appendix_patching_id); reloc_type = relocInfo::oop_type; break; |
|
397 |
default: ShouldNotReachHere(); |
|
398 |
} |
|
399 |
__ bind(call_patch); |
|
400 |
||
401 |
if (CommentedAssembly) { |
|
402 |
__ block_comment("patch entry point"); |
|
403 |
} |
|
404 |
// Cannot use call_c_opt() because its size is not constant. |
|
405 |
__ load_const(Z_R1_scratch, target); // Must not optimize in order to keep constant _patch_info_offset constant. |
|
406 |
__ z_basr(Z_R14, Z_R1_scratch); |
|
407 |
assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change"); |
|
408 |
ce->add_call_info_here(_info); |
|
409 |
__ z_brcl(Assembler::bcondAlways, _patch_site_entry); |
|
410 |
if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) { |
|
411 |
CodeSection* cs = __ code_section(); |
|
412 |
address pc = (address)_pc_start; |
|
413 |
RelocIterator iter(cs, pc, pc + 1); |
|
414 |
relocInfo::change_reloc_info_for_address(&iter, (address) pc, reloc_type, relocInfo::none); |
|
415 |
} |
|
416 |
} |
|
417 |
||
418 |
void DeoptimizeStub::emit_code(LIR_Assembler* ce) { |
|
419 |
__ bind(_entry); |
|
420 |
__ load_const_optimized(Z_R1_scratch, _trap_request); // Pass trap request in Z_R1_scratch. |
|
421 |
ce->emit_call_c(Runtime1::entry_for (Runtime1::deoptimize_id)); |
|
422 |
CHECK_BAILOUT(); |
|
423 |
ce->add_call_info_here(_info); |
|
424 |
DEBUG_ONLY(__ should_not_reach_here()); |
|
425 |
} |
|
426 |
||
427 |
void ArrayCopyStub::emit_code(LIR_Assembler* ce) { |
|
428 |
// Slow case: call to native. |
|
429 |
__ bind(_entry); |
|
430 |
__ lgr_if_needed(Z_ARG1, src()->as_register()); |
|
431 |
__ lgr_if_needed(Z_ARG2, src_pos()->as_register()); |
|
432 |
__ lgr_if_needed(Z_ARG3, dst()->as_register()); |
|
433 |
__ lgr_if_needed(Z_ARG4, dst_pos()->as_register()); |
|
434 |
__ lgr_if_needed(Z_ARG5, length()->as_register()); |
|
435 |
||
436 |
// Must align calls sites, otherwise they can't be updated atomically on MP hardware. |
|
437 |
ce->align_call(lir_static_call); |
|
438 |
||
439 |
assert((__ offset() + NativeCall::call_far_pcrelative_displacement_offset) % NativeCall::call_far_pcrelative_displacement_alignment == 0, |
|
440 |
"must be aligned"); |
|
441 |
||
442 |
ce->emit_static_call_stub(); |
|
443 |
||
444 |
// Prepend each BRASL with a nop. |
|
445 |
__ relocate(relocInfo::static_call_type); |
|
446 |
__ z_nop(); |
|
447 |
__ z_brasl(Z_R14, SharedRuntime::get_resolve_static_call_stub()); |
|
448 |
ce->add_call_info_here(info()); |
|
449 |
ce->verify_oop_map(info()); |
|
450 |
||
451 |
#ifndef PRODUCT |
|
452 |
__ load_const_optimized(Z_R1_scratch, (address)&Runtime1::_arraycopy_slowcase_cnt); |
|
453 |
__ add2mem_32(Address(Z_R1_scratch), 1, Z_R0_scratch); |
|
454 |
#endif |
|
455 |
||
456 |
__ branch_optimized(Assembler::bcondAlways, _continuation); |
|
457 |
} |
|
458 |
||
459 |
#undef __ |