author | coleenp |
Sat, 27 May 2017 09:21:01 -0400 | |
changeset 46505 | fd4bc78630b1 |
parent 44631 | c2d275ef8f69 |
permissions | -rw-r--r-- |
42065 | 1 |
/* |
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* Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved. |
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* Copyright (c) 2016 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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||
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#include "precompiled.hpp" |
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#include "c1/c1_Defs.hpp" |
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#include "c1/c1_MacroAssembler.hpp" |
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#include "c1/c1_Runtime1.hpp" |
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#include "interpreter/interpreter.hpp" |
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#include "nativeInst_s390.hpp" |
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#include "oops/compiledICHolder.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "prims/jvmtiExport.hpp" |
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#include "register_s390.hpp" |
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#include "runtime/sharedRuntime.hpp" |
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#include "runtime/signature.hpp" |
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#include "runtime/vframeArray.hpp" |
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#include "utilities/macros.hpp" |
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#include "vmreg_s390.inline.hpp" |
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#include "registerSaver_s390.hpp" |
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#if INCLUDE_ALL_GCS |
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#include "gc/g1/g1SATBCardTableModRefBS.hpp" |
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#endif |
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||
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// Implementation of StubAssembler |
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int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry_point, int number_of_arguments) { |
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set_num_rt_args(0); // Nothing on stack. |
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assert(!(oop_result1->is_valid() || metadata_result->is_valid()) || oop_result1 != metadata_result, "registers must be different"); |
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// We cannot trust that code generated by the C++ compiler saves R14 |
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// to z_abi_160.return_pc, because sometimes it spills R14 using stmg at |
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// z_abi_160.gpr14 (e.g. InterpreterRuntime::_new()). |
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// Therefore we load the PC into Z_R1_scratch and let set_last_Java_frame() save |
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// it into the frame anchor. |
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address pc = get_PC(Z_R1_scratch); |
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int call_offset = (int)(pc - addr_at(0)); |
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set_last_Java_frame(Z_SP, Z_R1_scratch); |
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// ARG1 must hold thread address. |
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z_lgr(Z_ARG1, Z_thread); |
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address return_pc = NULL; |
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align_call_far_patchable(this->pc()); |
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return_pc = call_c_opt(entry_point); |
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assert(return_pc != NULL, "const section overflow"); |
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reset_last_Java_frame(); |
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// Check for pending exceptions. |
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{ |
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load_and_test_long(Z_R0_scratch, Address(Z_thread, Thread::pending_exception_offset())); |
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// This used to conditionally jump to forward_exception however it is |
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// possible if we relocate that the branch will not reach. So we must jump |
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// around so we can always reach. |
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Label ok; |
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z_bre(ok); // Bcondequal is the same as bcondZero. |
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// exception pending => forward to exception handler |
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// Make sure that the vm_results are cleared. |
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if (oop_result1->is_valid()) { |
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clear_mem(Address(Z_thread, JavaThread::vm_result_offset()), sizeof(jlong)); |
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} |
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if (metadata_result->is_valid()) { |
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clear_mem(Address(Z_thread, JavaThread::vm_result_2_offset()), sizeof(jlong)); |
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} |
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if (frame_size() == no_frame_size) { |
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// Pop the stub frame. |
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pop_frame(); |
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restore_return_pc(); |
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load_const_optimized(Z_R1, StubRoutines::forward_exception_entry()); |
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z_br(Z_R1); |
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} else if (_stub_id == Runtime1::forward_exception_id) { |
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should_not_reach_here(); |
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} else { |
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load_const_optimized(Z_R1, Runtime1::entry_for (Runtime1::forward_exception_id)); |
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z_br(Z_R1); |
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} |
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bind(ok); |
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} |
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// Get oop results if there are any and reset the values in the thread. |
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if (oop_result1->is_valid()) { |
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get_vm_result(oop_result1); |
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} |
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if (metadata_result->is_valid()) { |
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get_vm_result_2(metadata_result); |
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} |
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return call_offset; |
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} |
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int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) { |
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// Z_ARG1 is reserved for the thread. |
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lgr_if_needed(Z_ARG2, arg1); |
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return call_RT(oop_result1, metadata_result, entry, 1); |
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} |
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int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) { |
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// Z_ARG1 is reserved for the thread. |
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lgr_if_needed(Z_ARG2, arg1); |
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assert(arg2 != Z_ARG2, "smashed argument"); |
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lgr_if_needed(Z_ARG3, arg2); |
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return call_RT(oop_result1, metadata_result, entry, 2); |
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} |
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int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) { |
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// Z_ARG1 is reserved for the thread. |
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lgr_if_needed(Z_ARG2, arg1); |
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assert(arg2 != Z_ARG2, "smashed argument"); |
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lgr_if_needed(Z_ARG3, arg2); |
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assert(arg3 != Z_ARG3, "smashed argument"); |
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lgr_if_needed(Z_ARG4, arg3); |
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return call_RT(oop_result1, metadata_result, entry, 3); |
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} |
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// Implementation of Runtime1 |
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#define __ sasm-> |
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#ifndef PRODUCT |
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#undef __ |
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#define __ (Verbose ? (sasm->block_comment(FILE_AND_LINE),sasm):sasm)-> |
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#endif // !PRODUCT |
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#define BLOCK_COMMENT(str) if (PrintAssembly) __ block_comment(str) |
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#define BIND(label) bind(label); BLOCK_COMMENT(#label ":") |
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static OopMap* generate_oop_map(StubAssembler* sasm) { |
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RegisterSaver::RegisterSet reg_set = RegisterSaver::all_registers; |
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int frame_size_in_slots = |
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RegisterSaver::live_reg_frame_size(reg_set) / VMRegImpl::stack_slot_size; |
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sasm->set_frame_size(frame_size_in_slots / VMRegImpl::slots_per_word); |
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return RegisterSaver::generate_oop_map(sasm, reg_set); |
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} |
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static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true, Register return_pc = Z_R14) { |
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__ block_comment("save_live_registers"); |
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RegisterSaver::RegisterSet reg_set = |
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save_fpu_registers ? RegisterSaver::all_registers : RegisterSaver::all_integer_registers; |
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int frame_size_in_slots = |
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RegisterSaver::live_reg_frame_size(reg_set) / VMRegImpl::stack_slot_size; |
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sasm->set_frame_size(frame_size_in_slots / VMRegImpl::slots_per_word); |
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return RegisterSaver::save_live_registers(sasm, reg_set, return_pc); |
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} |
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static OopMap* save_live_registers_except_r2(StubAssembler* sasm, bool save_fpu_registers = true) { |
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if (!save_fpu_registers) { |
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__ unimplemented(FILE_AND_LINE); |
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} |
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__ block_comment("save_live_registers"); |
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RegisterSaver::RegisterSet reg_set = RegisterSaver::all_registers_except_r2; |
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int frame_size_in_slots = |
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RegisterSaver::live_reg_frame_size(reg_set) / VMRegImpl::stack_slot_size; |
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sasm->set_frame_size(frame_size_in_slots / VMRegImpl::slots_per_word); |
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return RegisterSaver::save_live_registers(sasm, reg_set); |
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} |
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static OopMap* save_volatile_registers(StubAssembler* sasm, Register return_pc = Z_R14) { |
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__ block_comment("save_volatile_registers"); |
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RegisterSaver::RegisterSet reg_set = RegisterSaver::all_volatile_registers; |
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int frame_size_in_slots = |
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RegisterSaver::live_reg_frame_size(reg_set) / VMRegImpl::stack_slot_size; |
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sasm->set_frame_size(frame_size_in_slots / VMRegImpl::slots_per_word); |
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return RegisterSaver::save_live_registers(sasm, reg_set, return_pc); |
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} |
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static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) { |
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__ block_comment("restore_live_registers"); |
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RegisterSaver::RegisterSet reg_set = |
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restore_fpu_registers ? RegisterSaver::all_registers : RegisterSaver::all_integer_registers; |
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RegisterSaver::restore_live_registers(sasm, reg_set); |
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} |
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static void restore_live_registers_except_r2(StubAssembler* sasm, bool restore_fpu_registers = true) { |
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if (!restore_fpu_registers) { |
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__ unimplemented(FILE_AND_LINE); |
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} |
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__ block_comment("restore_live_registers_except_r2"); |
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RegisterSaver::restore_live_registers(sasm, RegisterSaver::all_registers_except_r2); |
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} |
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211 |
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212 |
static void restore_volatile_registers(StubAssembler* sasm) { |
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__ block_comment("restore_volatile_registers"); |
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RegisterSaver::RegisterSet reg_set = RegisterSaver::all_volatile_registers; |
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RegisterSaver::restore_live_registers(sasm, reg_set); |
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} |
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217 |
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void Runtime1::initialize_pd() { |
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// Nothing to do. |
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} |
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221 |
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OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) { |
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// Make a frame and preserve the caller's caller-save registers. |
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OopMap* oop_map = save_live_registers(sasm); |
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int call_offset; |
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if (!has_argument) { |
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call_offset = __ call_RT(noreg, noreg, target); |
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} else { |
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call_offset = __ call_RT(noreg, noreg, target, Z_R1_scratch, Z_R0_scratch); |
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} |
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OopMapSet* oop_maps = new OopMapSet(); |
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oop_maps->add_gc_map(call_offset, oop_map); |
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__ should_not_reach_here(); |
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return oop_maps; |
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} |
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237 |
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void Runtime1::generate_unwind_exception(StubAssembler *sasm) { |
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// Incoming parameters: Z_EXC_OOP and Z_EXC_PC. |
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// Keep copies in callee-saved registers during runtime call. |
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const Register exception_oop_callee_saved = Z_R11; |
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const Register exception_pc_callee_saved = Z_R12; |
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// Other registers used in this stub. |
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const Register handler_addr = Z_R4; |
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245 |
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246 |
// Verify that only exception_oop, is valid at this time. |
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__ invalidate_registers(Z_EXC_OOP, Z_EXC_PC); |
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248 |
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249 |
// Check that fields in JavaThread for exception oop and issuing pc are set. |
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__ asm_assert_mem8_is_zero(in_bytes(JavaThread::exception_oop_offset()), Z_thread, "exception oop already set : " FILE_AND_LINE, 0); |
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__ asm_assert_mem8_is_zero(in_bytes(JavaThread::exception_pc_offset()), Z_thread, "exception pc already set : " FILE_AND_LINE, 0); |
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252 |
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253 |
// Save exception_oop and pc in callee-saved register to preserve it |
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// during runtime calls. |
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255 |
__ verify_not_null_oop(Z_EXC_OOP); |
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256 |
__ lgr_if_needed(exception_oop_callee_saved, Z_EXC_OOP); |
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257 |
__ lgr_if_needed(exception_pc_callee_saved, Z_EXC_PC); |
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258 |
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259 |
__ push_frame_abi160(0); // Runtime code needs the z_abi_160. |
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260 |
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261 |
// Search the exception handler address of the caller (using the return address). |
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262 |
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), Z_thread, Z_EXC_PC); |
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263 |
// Z_RET(Z_R2): exception handler address of the caller. |
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264 |
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265 |
__ pop_frame(); |
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266 |
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267 |
__ invalidate_registers(exception_oop_callee_saved, exception_pc_callee_saved, Z_RET); |
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268 |
||
269 |
// Move result of call into correct register. |
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270 |
__ lgr_if_needed(handler_addr, Z_RET); |
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271 |
||
272 |
// Restore exception oop and pc to Z_EXC_OOP and Z_EXC_PC (required convention of exception handler). |
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273 |
__ lgr_if_needed(Z_EXC_OOP, exception_oop_callee_saved); |
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274 |
__ lgr_if_needed(Z_EXC_PC, exception_pc_callee_saved); |
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275 |
||
276 |
// Verify that there is really a valid exception in Z_EXC_OOP. |
|
277 |
__ verify_not_null_oop(Z_EXC_OOP); |
|
278 |
||
279 |
__ z_br(handler_addr); // Jump to exception handler. |
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280 |
} |
|
281 |
||
282 |
OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) { |
|
283 |
// Make a frame and preserve the caller's caller-save registers. |
|
284 |
OopMap* oop_map = save_live_registers(sasm); |
|
285 |
||
286 |
// Call the runtime patching routine, returns non-zero if nmethod got deopted. |
|
287 |
int call_offset = __ call_RT(noreg, noreg, target); |
|
288 |
OopMapSet* oop_maps = new OopMapSet(); |
|
289 |
oop_maps->add_gc_map(call_offset, oop_map); |
|
290 |
||
291 |
// Re-execute the patched instruction or, if the nmethod was |
|
292 |
// deoptmized, return to the deoptimization handler entry that will |
|
293 |
// cause re-execution of the current bytecode. |
|
294 |
DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); |
|
295 |
assert(deopt_blob != NULL, "deoptimization blob must have been created"); |
|
296 |
||
297 |
__ z_ltr(Z_RET, Z_RET); // return value == 0 |
|
298 |
||
299 |
restore_live_registers(sasm); |
|
300 |
||
301 |
__ z_bcr(Assembler::bcondZero, Z_R14); |
|
302 |
||
303 |
// Return to the deoptimization handler entry for unpacking and |
|
304 |
// rexecute if we simply returned then we'd deopt as if any call we |
|
305 |
// patched had just returned. |
|
306 |
AddressLiteral dest(deopt_blob->unpack_with_reexecution()); |
|
307 |
__ load_const_optimized(Z_R1_scratch, dest); |
|
308 |
__ z_br(Z_R1_scratch); |
|
309 |
||
310 |
return oop_maps; |
|
311 |
} |
|
312 |
||
313 |
OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) { |
|
314 |
||
315 |
// for better readability |
|
316 |
const bool must_gc_arguments = true; |
|
317 |
const bool dont_gc_arguments = false; |
|
318 |
||
319 |
// Default value; overwritten for some optimized stubs that are |
|
320 |
// called from methods that do not use the fpu. |
|
321 |
bool save_fpu_registers = true; |
|
322 |
||
323 |
// Stub code and info for the different stubs. |
|
324 |
OopMapSet* oop_maps = NULL; |
|
325 |
switch (id) { |
|
326 |
case forward_exception_id: |
|
327 |
{ |
|
328 |
oop_maps = generate_handle_exception(id, sasm); |
|
329 |
// will not return |
|
330 |
} |
|
331 |
break; |
|
332 |
||
333 |
case new_instance_id: |
|
334 |
case fast_new_instance_id: |
|
335 |
case fast_new_instance_init_check_id: |
|
336 |
{ |
|
337 |
Register klass = Z_R11; // Incoming |
|
338 |
Register obj = Z_R2; // Result |
|
339 |
||
340 |
if (id == new_instance_id) { |
|
341 |
__ set_info("new_instance", dont_gc_arguments); |
|
342 |
} else if (id == fast_new_instance_id) { |
|
343 |
__ set_info("fast new_instance", dont_gc_arguments); |
|
344 |
} else { |
|
345 |
assert(id == fast_new_instance_init_check_id, "bad StubID"); |
|
346 |
__ set_info("fast new_instance init check", dont_gc_arguments); |
|
347 |
} |
|
348 |
||
349 |
if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) && |
|
350 |
UseTLAB && FastTLABRefill) { |
|
351 |
// Sapjvm: must call RT to generate allocation events. |
|
352 |
} |
|
353 |
||
354 |
OopMap* map = save_live_registers_except_r2(sasm); |
|
355 |
int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass); |
|
356 |
oop_maps = new OopMapSet(); |
|
357 |
oop_maps->add_gc_map(call_offset, map); |
|
358 |
restore_live_registers_except_r2(sasm); |
|
359 |
||
360 |
__ verify_oop(obj); |
|
361 |
__ z_br(Z_R14); |
|
362 |
} |
|
363 |
break; |
|
364 |
||
365 |
case counter_overflow_id: |
|
366 |
{ |
|
367 |
// Arguments : |
|
368 |
// bci : stack param 0 |
|
369 |
// method : stack param 1 |
|
370 |
// |
|
371 |
Register bci = Z_ARG2, method = Z_ARG3; |
|
372 |
// frame size in bytes |
|
373 |
OopMap* map = save_live_registers(sasm); |
|
374 |
const int frame_size = sasm->frame_size() * VMRegImpl::slots_per_word * VMRegImpl::stack_slot_size; |
|
375 |
__ z_lg(bci, 0*BytesPerWord + FrameMap::first_available_sp_in_frame + frame_size, Z_SP); |
|
376 |
__ z_lg(method, 1*BytesPerWord + FrameMap::first_available_sp_in_frame + frame_size, Z_SP); |
|
377 |
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method); |
|
378 |
oop_maps = new OopMapSet(); |
|
379 |
oop_maps->add_gc_map(call_offset, map); |
|
380 |
restore_live_registers(sasm); |
|
381 |
__ z_br(Z_R14); |
|
382 |
} |
|
383 |
break; |
|
384 |
case new_type_array_id: |
|
385 |
case new_object_array_id: |
|
386 |
{ |
|
387 |
Register length = Z_R13; // Incoming |
|
388 |
Register klass = Z_R11; // Incoming |
|
389 |
Register obj = Z_R2; // Result |
|
390 |
||
391 |
if (id == new_type_array_id) { |
|
392 |
__ set_info("new_type_array", dont_gc_arguments); |
|
393 |
} else { |
|
394 |
__ set_info("new_object_array", dont_gc_arguments); |
|
395 |
} |
|
396 |
||
397 |
#ifdef ASSERT |
|
398 |
// Assert object type is really an array of the proper kind. |
|
399 |
{ |
|
400 |
NearLabel ok; |
|
401 |
Register t0 = obj; |
|
402 |
__ mem2reg_opt(t0, Address(klass, Klass::layout_helper_offset()), false); |
|
403 |
__ z_sra(t0, Klass::_lh_array_tag_shift); |
|
404 |
int tag = ((id == new_type_array_id) |
|
405 |
? Klass::_lh_array_tag_type_value |
|
406 |
: Klass::_lh_array_tag_obj_value); |
|
407 |
__ compare32_and_branch(t0, tag, Assembler::bcondEqual, ok); |
|
408 |
__ stop("assert(is an array klass)"); |
|
409 |
__ should_not_reach_here(); |
|
410 |
__ bind(ok); |
|
411 |
} |
|
412 |
#endif // ASSERT |
|
413 |
||
414 |
if (UseTLAB && FastTLABRefill) { |
|
415 |
// sapjvm: must call RT to generate allocation events. |
|
416 |
} |
|
417 |
||
418 |
OopMap* map = save_live_registers_except_r2(sasm); |
|
419 |
int call_offset; |
|
420 |
if (id == new_type_array_id) { |
|
421 |
call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length); |
|
422 |
} else { |
|
423 |
call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length); |
|
424 |
} |
|
425 |
||
426 |
oop_maps = new OopMapSet(); |
|
427 |
oop_maps->add_gc_map(call_offset, map); |
|
428 |
restore_live_registers_except_r2(sasm); |
|
429 |
||
430 |
__ verify_oop(obj); |
|
431 |
__ z_br(Z_R14); |
|
432 |
} |
|
433 |
break; |
|
434 |
||
435 |
case new_multi_array_id: |
|
436 |
{ __ set_info("new_multi_array", dont_gc_arguments); |
|
437 |
// Z_R3,: klass |
|
438 |
// Z_R4,: rank |
|
439 |
// Z_R5: address of 1st dimension |
|
440 |
OopMap* map = save_live_registers(sasm); |
|
441 |
int call_offset = __ call_RT(Z_R2, noreg, CAST_FROM_FN_PTR(address, new_multi_array), Z_R3, Z_R4, Z_R5); |
|
442 |
||
443 |
oop_maps = new OopMapSet(); |
|
444 |
oop_maps->add_gc_map(call_offset, map); |
|
445 |
restore_live_registers_except_r2(sasm); |
|
446 |
||
447 |
// Z_R2,: new multi array |
|
448 |
__ verify_oop(Z_R2); |
|
449 |
__ z_br(Z_R14); |
|
450 |
} |
|
451 |
break; |
|
452 |
||
453 |
case register_finalizer_id: |
|
454 |
{ |
|
455 |
__ set_info("register_finalizer", dont_gc_arguments); |
|
456 |
||
457 |
// Load the klass and check the has finalizer flag. |
|
458 |
Register klass = Z_ARG2; |
|
459 |
__ load_klass(klass, Z_ARG1); |
|
460 |
__ testbit(Address(klass, Klass::access_flags_offset()), exact_log2(JVM_ACC_HAS_FINALIZER)); |
|
461 |
__ z_bcr(Assembler::bcondAllZero, Z_R14); // Return if bit is not set. |
|
462 |
||
463 |
OopMap* oop_map = save_live_registers(sasm); |
|
464 |
int call_offset = __ call_RT(noreg, noreg, |
|
465 |
CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), Z_ARG1); |
|
466 |
oop_maps = new OopMapSet(); |
|
467 |
oop_maps->add_gc_map(call_offset, oop_map); |
|
468 |
||
469 |
// Now restore all the live registers. |
|
470 |
restore_live_registers(sasm); |
|
471 |
||
472 |
__ z_br(Z_R14); |
|
473 |
} |
|
474 |
break; |
|
475 |
||
476 |
case throw_range_check_failed_id: |
|
477 |
{ __ set_info("range_check_failed", dont_gc_arguments); |
|
478 |
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true); |
|
479 |
} |
|
480 |
break; |
|
481 |
||
482 |
case throw_index_exception_id: |
|
483 |
{ __ set_info("index_range_check_failed", dont_gc_arguments); |
|
484 |
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true); |
|
485 |
} |
|
486 |
break; |
|
487 |
case throw_div0_exception_id: |
|
488 |
{ __ set_info("throw_div0_exception", dont_gc_arguments); |
|
489 |
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false); |
|
490 |
} |
|
491 |
break; |
|
492 |
case throw_null_pointer_exception_id: |
|
493 |
{ __ set_info("throw_null_pointer_exception", dont_gc_arguments); |
|
494 |
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false); |
|
495 |
} |
|
496 |
break; |
|
497 |
case handle_exception_nofpu_id: |
|
498 |
case handle_exception_id: |
|
499 |
{ __ set_info("handle_exception", dont_gc_arguments); |
|
500 |
oop_maps = generate_handle_exception(id, sasm); |
|
501 |
} |
|
502 |
break; |
|
503 |
case handle_exception_from_callee_id: |
|
504 |
{ __ set_info("handle_exception_from_callee", dont_gc_arguments); |
|
505 |
oop_maps = generate_handle_exception(id, sasm); |
|
506 |
} |
|
507 |
break; |
|
508 |
case unwind_exception_id: |
|
509 |
{ __ set_info("unwind_exception", dont_gc_arguments); |
|
510 |
// Note: no stubframe since we are about to leave the current |
|
511 |
// activation and we are calling a leaf VM function only. |
|
512 |
generate_unwind_exception(sasm); |
|
513 |
} |
|
514 |
break; |
|
515 |
case throw_array_store_exception_id: |
|
516 |
{ __ set_info("throw_array_store_exception", dont_gc_arguments); |
|
517 |
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true); |
|
518 |
} |
|
519 |
break; |
|
520 |
case throw_class_cast_exception_id: |
|
521 |
{ // Z_R1_scratch: object |
|
522 |
__ set_info("throw_class_cast_exception", dont_gc_arguments); |
|
523 |
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true); |
|
524 |
} |
|
525 |
break; |
|
526 |
case throw_incompatible_class_change_error_id: |
|
527 |
{ __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments); |
|
528 |
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false); |
|
529 |
} |
|
530 |
break; |
|
531 |
case slow_subtype_check_id: |
|
532 |
{ |
|
533 |
// Arguments : |
|
534 |
// sub : stack param 0 |
|
535 |
// super: stack param 1 |
|
536 |
// raddr: Z_R14, blown by call |
|
537 |
// |
|
538 |
// Result : condition code 0 for match (bcondEqual will be true), |
|
539 |
// condition code 2 for miss (bcondNotEqual will be true) |
|
540 |
NearLabel miss; |
|
541 |
const Register Rsubklass = Z_ARG2; // sub |
|
542 |
const Register Rsuperklass = Z_ARG3; // super |
|
543 |
||
544 |
// No args, but tmp registers that are killed. |
|
545 |
const Register Rlength = Z_ARG4; // cache array length |
|
546 |
const Register Rarray_ptr = Z_ARG5; // Current value from cache array. |
|
547 |
||
548 |
if (UseCompressedOops) { |
|
549 |
assert(Universe::heap() != NULL, "java heap must be initialized to generate partial_subtype_check stub"); |
|
550 |
} |
|
551 |
||
552 |
const int frame_size = 4*BytesPerWord + frame::z_abi_160_size; |
|
553 |
// Save return pc. This is not necessary, but could be helpful |
|
554 |
// in the case of crashes. |
|
555 |
__ save_return_pc(); |
|
556 |
__ push_frame(frame_size); |
|
557 |
// Save registers before changing them. |
|
558 |
int i = 0; |
|
559 |
__ z_stg(Rsubklass, (i++)*BytesPerWord + frame::z_abi_160_size, Z_SP); |
|
560 |
__ z_stg(Rsuperklass, (i++)*BytesPerWord + frame::z_abi_160_size, Z_SP); |
|
561 |
__ z_stg(Rlength, (i++)*BytesPerWord + frame::z_abi_160_size, Z_SP); |
|
562 |
__ z_stg(Rarray_ptr, (i++)*BytesPerWord + frame::z_abi_160_size, Z_SP); |
|
563 |
assert(i*BytesPerWord + frame::z_abi_160_size == frame_size, "check"); |
|
564 |
||
565 |
// Get sub and super from stack. |
|
566 |
__ z_lg(Rsubklass, 0*BytesPerWord + FrameMap::first_available_sp_in_frame + frame_size, Z_SP); |
|
567 |
__ z_lg(Rsuperklass, 1*BytesPerWord + FrameMap::first_available_sp_in_frame + frame_size, Z_SP); |
|
568 |
||
569 |
__ check_klass_subtype_slow_path(Rsubklass, Rsuperklass, Rarray_ptr, Rlength, NULL, &miss); |
|
570 |
||
571 |
// Match falls through here. |
|
572 |
i = 0; |
|
573 |
__ z_lg(Rsubklass, (i++)*BytesPerWord + frame::z_abi_160_size, Z_SP); |
|
574 |
__ z_lg(Rsuperklass, (i++)*BytesPerWord + frame::z_abi_160_size, Z_SP); |
|
575 |
__ z_lg(Rlength, (i++)*BytesPerWord + frame::z_abi_160_size, Z_SP); |
|
576 |
__ z_lg(Rarray_ptr, (i++)*BytesPerWord + frame::z_abi_160_size, Z_SP); |
|
577 |
assert(i*BytesPerWord + frame::z_abi_160_size == frame_size, "check"); |
|
578 |
__ pop_frame(); |
|
579 |
// Return pc is still in R_14. |
|
580 |
__ clear_reg(Z_R0_scratch); // Zero indicates a match. Set CC 0 (bcondEqual will be true) |
|
581 |
__ z_br(Z_R14); |
|
582 |
||
583 |
__ BIND(miss); |
|
584 |
i = 0; |
|
585 |
__ z_lg(Rsubklass, (i++)*BytesPerWord + frame::z_abi_160_size, Z_SP); |
|
586 |
__ z_lg(Rsuperklass, (i++)*BytesPerWord + frame::z_abi_160_size, Z_SP); |
|
587 |
__ z_lg(Rlength, (i++)*BytesPerWord + frame::z_abi_160_size, Z_SP); |
|
588 |
__ z_lg(Rarray_ptr, (i++)*BytesPerWord + frame::z_abi_160_size, Z_SP); |
|
589 |
assert(i*BytesPerWord + frame::z_abi_160_size == frame_size, "check"); |
|
590 |
__ pop_frame(); |
|
591 |
// return pc is still in R_14 |
|
592 |
__ load_const_optimized(Z_R0_scratch, 1); // One indicates a miss. |
|
593 |
__ z_ltgr(Z_R0_scratch, Z_R0_scratch); // Set CC 2 (bcondNotEqual will be true). |
|
594 |
__ z_br(Z_R14); |
|
595 |
} |
|
596 |
break; |
|
597 |
case monitorenter_nofpu_id: |
|
598 |
case monitorenter_id: |
|
599 |
{ // Z_R1_scratch : object |
|
600 |
// Z_R13 : lock address (see LIRGenerator::syncTempOpr()) |
|
601 |
__ set_info("monitorenter", dont_gc_arguments); |
|
602 |
||
603 |
int save_fpu_registers = (id == monitorenter_id); |
|
604 |
// Make a frame and preserve the caller's caller-save registers. |
|
605 |
OopMap* oop_map = save_live_registers(sasm, save_fpu_registers); |
|
606 |
||
607 |
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), Z_R1_scratch, Z_R13); |
|
608 |
||
609 |
oop_maps = new OopMapSet(); |
|
610 |
oop_maps->add_gc_map(call_offset, oop_map); |
|
611 |
restore_live_registers(sasm, save_fpu_registers); |
|
612 |
||
613 |
__ z_br(Z_R14); |
|
614 |
} |
|
615 |
break; |
|
616 |
||
617 |
case monitorexit_nofpu_id: |
|
618 |
case monitorexit_id: |
|
619 |
{ // Z_R1_scratch : lock address |
|
620 |
// Note: really a leaf routine but must setup last java sp |
|
621 |
// => Use call_RT for now (speed can be improved by |
|
622 |
// doing last java sp setup manually). |
|
623 |
__ set_info("monitorexit", dont_gc_arguments); |
|
624 |
||
625 |
int save_fpu_registers = (id == monitorexit_id); |
|
626 |
// Make a frame and preserve the caller's caller-save registers. |
|
627 |
OopMap* oop_map = save_live_registers(sasm, save_fpu_registers); |
|
628 |
||
629 |
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), Z_R1_scratch); |
|
630 |
||
631 |
oop_maps = new OopMapSet(); |
|
632 |
oop_maps->add_gc_map(call_offset, oop_map); |
|
633 |
restore_live_registers(sasm, save_fpu_registers); |
|
634 |
||
635 |
__ z_br(Z_R14); |
|
636 |
} |
|
637 |
break; |
|
638 |
||
639 |
case deoptimize_id: |
|
640 |
{ // Args: Z_R1_scratch: trap request |
|
641 |
__ set_info("deoptimize", dont_gc_arguments); |
|
642 |
Register trap_request = Z_R1_scratch; |
|
643 |
OopMap* oop_map = save_live_registers(sasm); |
|
644 |
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), trap_request); |
|
645 |
oop_maps = new OopMapSet(); |
|
646 |
oop_maps->add_gc_map(call_offset, oop_map); |
|
647 |
restore_live_registers(sasm); |
|
648 |
DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); |
|
649 |
assert(deopt_blob != NULL, "deoptimization blob must have been created"); |
|
650 |
AddressLiteral dest(deopt_blob->unpack_with_reexecution()); |
|
651 |
__ load_const_optimized(Z_R1_scratch, dest); |
|
652 |
__ z_br(Z_R1_scratch); |
|
653 |
} |
|
654 |
break; |
|
655 |
||
656 |
case access_field_patching_id: |
|
657 |
{ __ set_info("access_field_patching", dont_gc_arguments); |
|
658 |
oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching)); |
|
659 |
} |
|
660 |
break; |
|
661 |
||
662 |
case load_klass_patching_id: |
|
663 |
{ __ set_info("load_klass_patching", dont_gc_arguments); |
|
664 |
// We should set up register map. |
|
665 |
oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching)); |
|
666 |
} |
|
667 |
break; |
|
668 |
||
669 |
case load_mirror_patching_id: |
|
670 |
{ __ set_info("load_mirror_patching", dont_gc_arguments); |
|
671 |
oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching)); |
|
672 |
} |
|
673 |
break; |
|
674 |
||
675 |
case load_appendix_patching_id: |
|
676 |
{ __ set_info("load_appendix_patching", dont_gc_arguments); |
|
677 |
oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching)); |
|
678 |
} |
|
679 |
break; |
|
680 |
#if 0 |
|
681 |
case dtrace_object_alloc_id: |
|
682 |
{ // rax,: object |
|
683 |
StubFrame f(sasm, "dtrace_object_alloc", dont_gc_arguments); |
|
684 |
// We can't gc here so skip the oopmap but make sure that all |
|
685 |
// the live registers get saved. |
|
686 |
save_live_registers(sasm, 1); |
|
687 |
||
688 |
__ NOT_LP64(push(rax)) LP64_ONLY(mov(c_rarg0, rax)); |
|
689 |
__ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc))); |
|
690 |
NOT_LP64(__ pop(rax)); |
|
691 |
||
692 |
restore_live_registers(sasm); |
|
693 |
} |
|
694 |
break; |
|
695 |
||
696 |
case fpu2long_stub_id: |
|
697 |
{ |
|
698 |
// rax, and rdx are destroyed, but should be free since the result is returned there |
|
699 |
// preserve rsi,ecx |
|
700 |
__ push(rsi); |
|
701 |
__ push(rcx); |
|
702 |
LP64_ONLY(__ push(rdx);) |
|
703 |
||
704 |
// check for NaN |
|
705 |
Label return0, do_return, return_min_jlong, do_convert; |
|
706 |
||
707 |
Address value_high_word(rsp, wordSize + 4); |
|
708 |
Address value_low_word(rsp, wordSize); |
|
709 |
Address result_high_word(rsp, 3*wordSize + 4); |
|
710 |
Address result_low_word(rsp, 3*wordSize); |
|
711 |
||
712 |
__ subptr(rsp, 32); // more than enough on 32bit |
|
713 |
__ fst_d(value_low_word); |
|
714 |
__ movl(rax, value_high_word); |
|
715 |
__ andl(rax, 0x7ff00000); |
|
716 |
__ cmpl(rax, 0x7ff00000); |
|
717 |
__ jcc(Assembler::notEqual, do_convert); |
|
718 |
__ movl(rax, value_high_word); |
|
719 |
__ andl(rax, 0xfffff); |
|
720 |
__ orl(rax, value_low_word); |
|
721 |
__ jcc(Assembler::notZero, return0); |
|
722 |
||
723 |
__ bind(do_convert); |
|
724 |
__ fnstcw(Address(rsp, 0)); |
|
725 |
__ movzwl(rax, Address(rsp, 0)); |
|
726 |
__ orl(rax, 0xc00); |
|
727 |
__ movw(Address(rsp, 2), rax); |
|
728 |
__ fldcw(Address(rsp, 2)); |
|
729 |
__ fwait(); |
|
730 |
__ fistp_d(result_low_word); |
|
731 |
__ fldcw(Address(rsp, 0)); |
|
732 |
__ fwait(); |
|
733 |
// This gets the entire long in rax on 64bit |
|
734 |
__ movptr(rax, result_low_word); |
|
735 |
// testing of high bits |
|
736 |
__ movl(rdx, result_high_word); |
|
737 |
__ mov(rcx, rax); |
|
738 |
// What the heck is the point of the next instruction??? |
|
739 |
__ xorl(rcx, 0x0); |
|
740 |
__ movl(rsi, 0x80000000); |
|
741 |
__ xorl(rsi, rdx); |
|
742 |
__ orl(rcx, rsi); |
|
743 |
__ jcc(Assembler::notEqual, do_return); |
|
744 |
__ fldz(); |
|
745 |
__ fcomp_d(value_low_word); |
|
746 |
__ fnstsw_ax(); |
|
747 |
__ testl(rax, 0x4100); // ZF & CF == 0 |
|
748 |
__ jcc(Assembler::equal, return_min_jlong); |
|
749 |
// return max_jlong |
|
750 |
__ mov64(rax, CONST64(0x7fffffffffffffff)); |
|
751 |
__ jmp(do_return); |
|
752 |
||
753 |
__ bind(return_min_jlong); |
|
754 |
__ mov64(rax, UCONST64(0x8000000000000000)); |
|
755 |
__ jmp(do_return); |
|
756 |
||
757 |
__ bind(return0); |
|
758 |
__ fpop(); |
|
759 |
__ xorptr(rax, rax); |
|
760 |
||
761 |
__ bind(do_return); |
|
762 |
__ addptr(rsp, 32); |
|
763 |
LP64_ONLY(__ pop(rdx);) |
|
764 |
__ pop(rcx); |
|
765 |
__ pop(rsi); |
|
766 |
__ ret(0); |
|
767 |
} |
|
768 |
break; |
|
769 |
#endif // TODO |
|
770 |
||
771 |
#if INCLUDE_ALL_GCS |
|
772 |
case g1_pre_barrier_slow_id: |
|
773 |
{ // Z_R1_scratch: previous value of memory |
|
774 |
||
775 |
BarrierSet* bs = Universe::heap()->barrier_set(); |
|
776 |
if (bs->kind() != BarrierSet::G1SATBCTLogging) { |
|
777 |
__ should_not_reach_here(FILE_AND_LINE); |
|
778 |
break; |
|
779 |
} |
|
780 |
||
781 |
__ set_info("g1_pre_barrier_slow_id", dont_gc_arguments); |
|
782 |
||
783 |
Register pre_val = Z_R1_scratch; |
|
784 |
Register tmp = Z_R6; // Must be non-volatile because it is used to save pre_val. |
|
785 |
Register tmp2 = Z_R7; |
|
786 |
||
43449
21041ea7c0fe
8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
aharlap
parents:
42065
diff
changeset
|
787 |
Label refill, restart, marking_not_active; |
21041ea7c0fe
8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
aharlap
parents:
42065
diff
changeset
|
788 |
int satb_q_active_byte_offset = |
21041ea7c0fe
8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
aharlap
parents:
42065
diff
changeset
|
789 |
in_bytes(JavaThread::satb_mark_queue_offset() + |
21041ea7c0fe
8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
aharlap
parents:
42065
diff
changeset
|
790 |
SATBMarkQueue::byte_offset_of_active()); |
42065 | 791 |
int satb_q_index_byte_offset = |
792 |
in_bytes(JavaThread::satb_mark_queue_offset() + |
|
793 |
SATBMarkQueue::byte_offset_of_index()); |
|
794 |
int satb_q_buf_byte_offset = |
|
795 |
in_bytes(JavaThread::satb_mark_queue_offset() + |
|
796 |
SATBMarkQueue::byte_offset_of_buf()); |
|
797 |
||
798 |
// Save tmp registers (see assertion in G1PreBarrierStub::emit_code()). |
|
799 |
__ z_stg(tmp, 0*BytesPerWord + FrameMap::first_available_sp_in_frame, Z_SP); |
|
800 |
__ z_stg(tmp2, 1*BytesPerWord + FrameMap::first_available_sp_in_frame, Z_SP); |
|
801 |
||
43449
21041ea7c0fe
8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
aharlap
parents:
42065
diff
changeset
|
802 |
// Is marking still active? |
21041ea7c0fe
8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
aharlap
parents:
42065
diff
changeset
|
803 |
if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) { |
21041ea7c0fe
8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
aharlap
parents:
42065
diff
changeset
|
804 |
__ load_and_test_int(tmp, Address(Z_thread, satb_q_active_byte_offset)); |
21041ea7c0fe
8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
aharlap
parents:
42065
diff
changeset
|
805 |
} else { |
21041ea7c0fe
8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
aharlap
parents:
42065
diff
changeset
|
806 |
assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption"); |
21041ea7c0fe
8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
aharlap
parents:
42065
diff
changeset
|
807 |
__ load_and_test_byte(tmp, Address(Z_thread, satb_q_active_byte_offset)); |
21041ea7c0fe
8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
aharlap
parents:
42065
diff
changeset
|
808 |
} |
21041ea7c0fe
8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
aharlap
parents:
42065
diff
changeset
|
809 |
__ z_bre(marking_not_active); // Activity indicator is zero, so there is no marking going on currently. |
21041ea7c0fe
8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
aharlap
parents:
42065
diff
changeset
|
810 |
|
42065 | 811 |
__ bind(restart); |
812 |
// Load the index into the SATB buffer. SATBMarkQueue::_index is a |
|
813 |
// size_t so ld_ptr is appropriate. |
|
814 |
__ z_ltg(tmp, satb_q_index_byte_offset, Z_R0, Z_thread); |
|
815 |
||
816 |
// index == 0? |
|
817 |
__ z_brz(refill); |
|
818 |
||
819 |
__ z_lg(tmp2, satb_q_buf_byte_offset, Z_thread); |
|
820 |
__ add2reg(tmp, -oopSize); |
|
821 |
||
822 |
__ z_stg(pre_val, 0, tmp, tmp2); // [_buf + index] := <address_of_card> |
|
823 |
__ z_stg(tmp, satb_q_index_byte_offset, Z_thread); |
|
824 |
||
43449
21041ea7c0fe
8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
aharlap
parents:
42065
diff
changeset
|
825 |
__ bind(marking_not_active); |
42065 | 826 |
// Restore tmp registers (see assertion in G1PreBarrierStub::emit_code()). |
827 |
__ z_lg(tmp, 0*BytesPerWord + FrameMap::first_available_sp_in_frame, Z_SP); |
|
828 |
__ z_lg(tmp2, 1*BytesPerWord + FrameMap::first_available_sp_in_frame, Z_SP); |
|
829 |
__ z_br(Z_R14); |
|
830 |
||
831 |
__ bind(refill); |
|
832 |
save_volatile_registers(sasm); |
|
833 |
__ z_lgr(tmp, pre_val); // save pre_val |
|
834 |
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SATBMarkQueueSet::handle_zero_index_for_thread), |
|
835 |
Z_thread); |
|
836 |
__ z_lgr(pre_val, tmp); // restore pre_val |
|
837 |
restore_volatile_registers(sasm); |
|
838 |
__ z_bru(restart); |
|
839 |
} |
|
840 |
break; |
|
841 |
||
842 |
case g1_post_barrier_slow_id: |
|
843 |
{ // Z_R1_scratch: oop address, address of updated memory slot |
|
844 |
BarrierSet* bs = Universe::heap()->barrier_set(); |
|
845 |
if (bs->kind() != BarrierSet::G1SATBCTLogging) { |
|
846 |
__ should_not_reach_here(FILE_AND_LINE); |
|
847 |
break; |
|
848 |
} |
|
849 |
||
850 |
__ set_info("g1_post_barrier_slow_id", dont_gc_arguments); |
|
851 |
||
852 |
Register addr_oop = Z_R1_scratch; |
|
853 |
Register addr_card = Z_R1_scratch; |
|
854 |
Register r1 = Z_R6; // Must be saved/restored. |
|
855 |
Register r2 = Z_R7; // Must be saved/restored. |
|
856 |
Register cardtable = r1; // Must be non-volatile, because it is used to save addr_card. |
|
857 |
jbyte* byte_map_base = ((CardTableModRefBS*)bs)->byte_map_base; |
|
858 |
||
859 |
// Save registers used below (see assertion in G1PreBarrierStub::emit_code()). |
|
860 |
__ z_stg(r1, 0*BytesPerWord + FrameMap::first_available_sp_in_frame, Z_SP); |
|
861 |
||
862 |
Label not_already_dirty, restart, refill, young_card; |
|
863 |
||
864 |
// Calculate address of card corresponding to the updated oop slot. |
|
865 |
AddressLiteral rs(byte_map_base); |
|
866 |
__ z_srlg(addr_card, addr_oop, CardTableModRefBS::card_shift); |
|
867 |
addr_oop = noreg; // dead now |
|
868 |
__ load_const_optimized(cardtable, rs); // cardtable := <card table base> |
|
869 |
__ z_agr(addr_card, cardtable); // addr_card := addr_oop>>card_shift + cardtable |
|
870 |
||
871 |
__ z_cli(0, addr_card, (int)G1SATBCardTableModRefBS::g1_young_card_val()); |
|
872 |
__ z_bre(young_card); |
|
873 |
||
874 |
__ z_sync(); // Required to support concurrent cleaning. |
|
875 |
||
876 |
__ z_cli(0, addr_card, (int)CardTableModRefBS::dirty_card_val()); |
|
877 |
__ z_brne(not_already_dirty); |
|
878 |
||
879 |
__ bind(young_card); |
|
880 |
// We didn't take the branch, so we're already dirty: restore |
|
881 |
// used registers and return. |
|
882 |
__ z_lg(r1, 0*BytesPerWord + FrameMap::first_available_sp_in_frame, Z_SP); |
|
883 |
__ z_br(Z_R14); |
|
884 |
||
885 |
// Not dirty. |
|
886 |
__ bind(not_already_dirty); |
|
887 |
||
888 |
// First, dirty it: [addr_card] := 0 |
|
889 |
__ z_mvi(0, addr_card, CardTableModRefBS::dirty_card_val()); |
|
890 |
||
891 |
Register idx = cardtable; // Must be non-volatile, because it is used to save addr_card. |
|
892 |
Register buf = r2; |
|
893 |
cardtable = noreg; // now dead |
|
894 |
||
895 |
// Save registers used below (see assertion in G1PreBarrierStub::emit_code()). |
|
896 |
__ z_stg(r2, 1*BytesPerWord + FrameMap::first_available_sp_in_frame, Z_SP); |
|
897 |
||
898 |
ByteSize dirty_card_q_index_byte_offset = |
|
899 |
JavaThread::dirty_card_queue_offset() + DirtyCardQueue::byte_offset_of_index(); |
|
900 |
ByteSize dirty_card_q_buf_byte_offset = |
|
901 |
JavaThread::dirty_card_queue_offset() + DirtyCardQueue::byte_offset_of_buf(); |
|
902 |
||
903 |
__ bind(restart); |
|
904 |
||
905 |
// Get the index into the update buffer. DirtyCardQueue::_index is |
|
906 |
// a size_t so z_ltg is appropriate here. |
|
907 |
__ z_ltg(idx, Address(Z_thread, dirty_card_q_index_byte_offset)); |
|
908 |
||
909 |
// index == 0? |
|
910 |
__ z_brz(refill); |
|
911 |
||
912 |
__ z_lg(buf, Address(Z_thread, dirty_card_q_buf_byte_offset)); |
|
913 |
__ add2reg(idx, -oopSize); |
|
914 |
||
915 |
__ z_stg(addr_card, 0, idx, buf); // [_buf + index] := <address_of_card> |
|
916 |
__ z_stg(idx, Address(Z_thread, dirty_card_q_index_byte_offset)); |
|
917 |
// Restore killed registers and return. |
|
918 |
__ z_lg(r1, 0*BytesPerWord + FrameMap::first_available_sp_in_frame, Z_SP); |
|
919 |
__ z_lg(r2, 1*BytesPerWord + FrameMap::first_available_sp_in_frame, Z_SP); |
|
920 |
__ z_br(Z_R14); |
|
921 |
||
922 |
__ bind(refill); |
|
923 |
save_volatile_registers(sasm); |
|
924 |
__ z_lgr(idx, addr_card); // Save addr_card, tmp3 must be non-volatile. |
|
925 |
__ call_VM_leaf(CAST_FROM_FN_PTR(address, DirtyCardQueueSet::handle_zero_index_for_thread), |
|
926 |
Z_thread); |
|
927 |
__ z_lgr(addr_card, idx); |
|
928 |
restore_volatile_registers(sasm); // Restore addr_card. |
|
929 |
__ z_bru(restart); |
|
930 |
} |
|
931 |
break; |
|
932 |
#endif // INCLUDE_ALL_GCS |
|
933 |
case predicate_failed_trap_id: |
|
934 |
{ |
|
935 |
__ set_info("predicate_failed_trap", dont_gc_arguments); |
|
936 |
||
937 |
OopMap* map = save_live_registers(sasm); |
|
938 |
||
939 |
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap)); |
|
940 |
oop_maps = new OopMapSet(); |
|
941 |
oop_maps->add_gc_map(call_offset, map); |
|
942 |
restore_live_registers(sasm); |
|
943 |
||
944 |
DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); |
|
945 |
assert(deopt_blob != NULL, "deoptimization blob must have been created"); |
|
946 |
||
947 |
__ load_const_optimized(Z_R1_scratch, deopt_blob->unpack_with_reexecution()); |
|
948 |
__ z_br(Z_R1_scratch); |
|
949 |
} |
|
950 |
break; |
|
951 |
||
952 |
default: |
|
953 |
{ |
|
954 |
__ should_not_reach_here(FILE_AND_LINE, id); |
|
955 |
} |
|
956 |
break; |
|
957 |
} |
|
958 |
return oop_maps; |
|
959 |
} |
|
960 |
||
961 |
OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler *sasm) { |
|
962 |
__ block_comment("generate_handle_exception"); |
|
963 |
||
964 |
// incoming parameters: Z_EXC_OOP, Z_EXC_PC |
|
965 |
||
966 |
// Save registers if required. |
|
967 |
OopMapSet* oop_maps = new OopMapSet(); |
|
968 |
OopMap* oop_map = NULL; |
|
969 |
Register reg_fp = Z_R1_scratch; |
|
970 |
||
971 |
switch (id) { |
|
972 |
case forward_exception_id: { |
|
973 |
// We're handling an exception in the context of a compiled frame. |
|
974 |
// The registers have been saved in the standard places. Perform |
|
975 |
// an exception lookup in the caller and dispatch to the handler |
|
976 |
// if found. Otherwise unwind and dispatch to the callers |
|
977 |
// exception handler. |
|
978 |
oop_map = generate_oop_map(sasm); |
|
979 |
||
980 |
// Load and clear pending exception oop into. |
|
981 |
__ z_lg(Z_EXC_OOP, Address(Z_thread, Thread::pending_exception_offset())); |
|
982 |
__ clear_mem(Address(Z_thread, Thread::pending_exception_offset()), 8); |
|
983 |
||
984 |
// Different stubs forward their exceptions; they should all have similar frame layouts |
|
985 |
// (a) to find their return address (b) for a correct oop_map generated above. |
|
986 |
assert(RegisterSaver::live_reg_frame_size(RegisterSaver::all_registers) == |
|
987 |
RegisterSaver::live_reg_frame_size(RegisterSaver::all_registers_except_r2), "requirement"); |
|
988 |
||
989 |
// Load issuing PC (the return address for this stub). |
|
990 |
const int frame_size_in_bytes = sasm->frame_size() * VMRegImpl::slots_per_word * VMRegImpl::stack_slot_size; |
|
991 |
__ z_lg(Z_EXC_PC, Address(Z_SP, frame_size_in_bytes + _z_abi16(return_pc))); |
|
992 |
DEBUG_ONLY(__ z_lay(reg_fp, Address(Z_SP, frame_size_in_bytes));) |
|
993 |
||
994 |
// Make sure that the vm_results are cleared (may be unnecessary). |
|
995 |
__ clear_mem(Address(Z_thread, JavaThread::vm_result_offset()), sizeof(oop)); |
|
996 |
__ clear_mem(Address(Z_thread, JavaThread::vm_result_2_offset()), sizeof(Metadata*)); |
|
997 |
break; |
|
998 |
} |
|
999 |
case handle_exception_nofpu_id: |
|
1000 |
case handle_exception_id: |
|
1001 |
// At this point all registers MAY be live. |
|
1002 |
DEBUG_ONLY(__ z_lgr(reg_fp, Z_SP);) |
|
1003 |
oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id, Z_EXC_PC); |
|
1004 |
break; |
|
1005 |
case handle_exception_from_callee_id: { |
|
1006 |
// At this point all registers except Z_EXC_OOP and Z_EXC_PC are dead. |
|
1007 |
DEBUG_ONLY(__ z_lgr(reg_fp, Z_SP);) |
|
1008 |
__ save_return_pc(Z_EXC_PC); |
|
1009 |
const int frame_size_in_bytes = __ push_frame_abi160(0); |
|
1010 |
oop_map = new OopMap(frame_size_in_bytes / VMRegImpl::stack_slot_size, 0); |
|
1011 |
sasm->set_frame_size(frame_size_in_bytes / BytesPerWord); |
|
1012 |
break; |
|
1013 |
} |
|
1014 |
default: ShouldNotReachHere(); |
|
1015 |
} |
|
1016 |
||
1017 |
// Verify that only Z_EXC_OOP, and Z_EXC_PC are valid at this time. |
|
1018 |
__ invalidate_registers(Z_EXC_OOP, Z_EXC_PC, reg_fp); |
|
1019 |
// Verify that Z_EXC_OOP, contains a valid exception. |
|
1020 |
__ verify_not_null_oop(Z_EXC_OOP); |
|
1021 |
||
1022 |
// Check that fields in JavaThread for exception oop and issuing pc |
|
1023 |
// are empty before writing to them. |
|
1024 |
__ asm_assert_mem8_is_zero(in_bytes(JavaThread::exception_oop_offset()), Z_thread, "exception oop already set : " FILE_AND_LINE, 0); |
|
1025 |
__ asm_assert_mem8_is_zero(in_bytes(JavaThread::exception_pc_offset()), Z_thread, "exception pc already set : " FILE_AND_LINE, 0); |
|
1026 |
||
1027 |
// Save exception oop and issuing pc into JavaThread. |
|
1028 |
// (Exception handler will load it from here.) |
|
1029 |
__ z_stg(Z_EXC_OOP, Address(Z_thread, JavaThread::exception_oop_offset())); |
|
1030 |
__ z_stg(Z_EXC_PC, Address(Z_thread, JavaThread::exception_pc_offset())); |
|
1031 |
||
1032 |
#ifdef ASSERT |
|
1033 |
{ NearLabel ok; |
|
1034 |
__ z_cg(Z_EXC_PC, Address(reg_fp, _z_abi16(return_pc))); |
|
1035 |
__ branch_optimized(Assembler::bcondEqual, ok); |
|
1036 |
__ stop("use throwing pc as return address (has bci & oop map)"); |
|
1037 |
__ bind(ok); |
|
1038 |
} |
|
1039 |
#endif |
|
1040 |
||
1041 |
// Compute the exception handler. |
|
1042 |
// The exception oop and the throwing pc are read from the fields in JavaThread. |
|
1043 |
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc)); |
|
1044 |
oop_maps->add_gc_map(call_offset, oop_map); |
|
1045 |
||
1046 |
// Z_RET(Z_R2): handler address |
|
1047 |
// will be the deopt blob if nmethod was deoptimized while we looked up |
|
1048 |
// handler regardless of whether handler existed in the nmethod. |
|
1049 |
||
1050 |
// Only Z_R2, is valid at this time, all other registers have been destroyed by the runtime call. |
|
1051 |
__ invalidate_registers(Z_R2); |
|
1052 |
||
1053 |
switch(id) { |
|
1054 |
case forward_exception_id: |
|
1055 |
case handle_exception_nofpu_id: |
|
1056 |
case handle_exception_id: |
|
1057 |
// Restore the registers that were saved at the beginning. |
|
1058 |
__ z_lgr(Z_R1_scratch, Z_R2); // Restoring live registers kills Z_R2. |
|
1059 |
restore_live_registers(sasm, id != handle_exception_nofpu_id); // Pops as well the frame. |
|
1060 |
__ z_br(Z_R1_scratch); |
|
1061 |
break; |
|
1062 |
case handle_exception_from_callee_id: { |
|
1063 |
__ pop_frame(); |
|
1064 |
__ z_br(Z_R2); // Jump to exception handler. |
|
1065 |
} |
|
1066 |
break; |
|
1067 |
default: ShouldNotReachHere(); |
|
1068 |
} |
|
1069 |
||
1070 |
return oop_maps; |
|
1071 |
} |
|
1072 |
||
1073 |
||
1074 |
#undef __ |
|
1075 |
||
1076 |
const char *Runtime1::pd_name_for_address(address entry) { |
|
1077 |
return "<unknown function>"; |
|
1078 |
} |