annotate src/hotspot/cpu/s390/vtableStubs_s390.cpp @ 48888:d9fcb7ba8133

8191907: PPC64 and s390 parts of JDK-8174962: Better interface invocations Reviewed-by: goetz
author mdoerr
date Tue, 28 Nov 2017 01:08:26 +0300
parents 71c04702a3d5
children 54b344d9dd4e
rev   line source
goetz@42065 1 /*
mdoerr@48888 2 * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
mdoerr@48888 3 * Copyright (c) 2016, 2017 SAP SE. All rights reserved.
goetz@42065 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
goetz@42065 5 *
goetz@42065 6 * This code is free software; you can redistribute it and/or modify it
goetz@42065 7 * under the terms of the GNU General Public License version 2 only, as
goetz@42065 8 * published by the Free Software Foundation.
goetz@42065 9 *
goetz@42065 10 * This code is distributed in the hope that it will be useful, but WITHOUT
goetz@42065 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
goetz@42065 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
goetz@42065 13 * version 2 for more details (a copy is included in the LICENSE file that
goetz@42065 14 * accompanied this code).
goetz@42065 15 *
goetz@42065 16 * You should have received a copy of the GNU General Public License version
goetz@42065 17 * 2 along with this work; if not, write to the Free Software Foundation,
goetz@42065 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
goetz@42065 19 *
goetz@42065 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
goetz@42065 21 * or visit www.oracle.com if you need additional information or have any
goetz@42065 22 * questions.
goetz@42065 23 *
goetz@42065 24 */
goetz@42065 25
goetz@42065 26 #include "precompiled.hpp"
goetz@42065 27 #include "asm/macroAssembler.inline.hpp"
goetz@42065 28 #include "code/vtableStubs.hpp"
goetz@42065 29 #include "interp_masm_s390.hpp"
goetz@42065 30 #include "memory/resourceArea.hpp"
mdoerr@48888 31 #include "oops/compiledICHolder.hpp"
goetz@42065 32 #include "oops/instanceKlass.hpp"
goetz@42065 33 #include "oops/klassVtable.hpp"
goetz@42065 34 #include "runtime/sharedRuntime.hpp"
goetz@42065 35 #include "vmreg_s390.inline.hpp"
goetz@42065 36 #ifdef COMPILER2
goetz@42065 37 #include "opto/runtime.hpp"
goetz@42065 38 #endif
goetz@42065 39
goetz@42065 40 // Machine-dependent part of VtableStubs: create vtableStub of correct
goetz@42065 41 // size and initialize its code.
goetz@42065 42
goetz@42065 43 #define __ masm->
goetz@42065 44
goetz@42065 45 #ifndef PRODUCT
goetz@42065 46 extern "C" void bad_compiled_vtable_index(JavaThread* thread, oop receiver, int index);
goetz@42065 47 #endif
goetz@42065 48
goetz@42065 49 // Used by compiler only; may use only caller saved, non-argument registers.
goetz@42065 50 VtableStub* VtableStubs::create_vtable_stub(int vtable_index) {
goetz@42065 51
goetz@42065 52 const int code_length = VtableStub::pd_code_size_limit(true);
goetz@42065 53 VtableStub *s = new(code_length) VtableStub(true, vtable_index);
goetz@42065 54 if (s == NULL) { // Indicates OOM In the code cache.
goetz@42065 55 return NULL;
goetz@42065 56 }
goetz@42065 57
goetz@42065 58 ResourceMark rm;
goetz@42065 59 CodeBuffer cb(s->entry_point(), code_length);
goetz@42065 60 MacroAssembler *masm = new MacroAssembler(&cb);
goetz@42065 61 int padding_bytes = 0;
goetz@42065 62
goetz@42065 63 #if (!defined(PRODUCT) && defined(COMPILER2))
goetz@42065 64 if (CountCompiledCalls) {
goetz@42065 65 // Count unused bytes
goetz@42065 66 // worst case actual size
goetz@42065 67 padding_bytes += __ load_const_size() - __ load_const_optimized_rtn_len(Z_R1_scratch, (long)SharedRuntime::nof_megamorphic_calls_addr(), true);
goetz@42065 68
goetz@42065 69 // Use generic emitter for direct memory increment.
goetz@42065 70 // Abuse Z_method as scratch register for generic emitter.
goetz@42065 71 // It is loaded further down anyway before it is first used.
goetz@42065 72 __ add2mem_32(Address(Z_R1_scratch), 1, Z_method);
goetz@42065 73 }
goetz@42065 74 #endif
goetz@42065 75
goetz@42065 76 assert(VtableStub::receiver_location() == Z_R2->as_VMReg(), "receiver expected in Z_ARG1");
goetz@42065 77
goetz@42065 78 // Get receiver klass.
goetz@42065 79 // Must do an explicit check if implicit checks are disabled.
goetz@42065 80 address npe_addr = __ pc(); // npe == NULL ptr exception
goetz@42065 81 __ null_check(Z_ARG1, Z_R1_scratch, oopDesc::klass_offset_in_bytes());
goetz@42065 82 const Register rcvr_klass = Z_R1_scratch;
goetz@42065 83 __ load_klass(rcvr_klass, Z_ARG1);
goetz@42065 84
goetz@42065 85 // Set method (in case of interpreted method), and destination address.
lucy@46280 86 int entry_offset = in_bytes(Klass::vtable_start_offset()) +
goetz@42065 87 vtable_index * vtableEntry::size_in_bytes();
goetz@42065 88
goetz@42065 89 #ifndef PRODUCT
goetz@42065 90 if (DebugVtables) {
goetz@42065 91 Label L;
goetz@42065 92 // Check offset vs vtable length.
goetz@42065 93 const Register vtable_idx = Z_R0_scratch;
goetz@42065 94
goetz@42065 95 // Count unused bytes.
goetz@42065 96 // worst case actual size
goetz@42065 97 padding_bytes += __ load_const_size() - __ load_const_optimized_rtn_len(vtable_idx, vtable_index*vtableEntry::size_in_bytes(), true);
goetz@42065 98
lucy@46280 99 assert(Immediate::is_uimm12(in_bytes(Klass::vtable_length_offset())), "disp to large");
lucy@46280 100 __ z_cl(vtable_idx, in_bytes(Klass::vtable_length_offset()), rcvr_klass);
goetz@42065 101 __ z_brl(L);
goetz@42065 102 __ z_lghi(Z_ARG3, vtable_index); // Debug code, don't optimize.
goetz@42065 103 __ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), Z_ARG1, Z_ARG3, false);
goetz@42065 104 // Count unused bytes (assume worst case here).
goetz@42065 105 padding_bytes += 12;
goetz@42065 106 __ bind(L);
goetz@42065 107 }
goetz@42065 108 #endif
goetz@42065 109
goetz@42065 110 int v_off = entry_offset + vtableEntry::method_offset_in_bytes();
goetz@42065 111
goetz@42065 112 // Duplicate safety code from enc_class Java_Dynamic_Call_dynTOC.
goetz@42065 113 if (Displacement::is_validDisp(v_off)) {
goetz@42065 114 __ z_lg(Z_method/*method oop*/, v_off, rcvr_klass/*class oop*/);
goetz@42065 115 // Account for the load_const in the else path.
goetz@42065 116 padding_bytes += __ load_const_size();
goetz@42065 117 } else {
goetz@42065 118 // Worse case, offset does not fit in displacement field.
goetz@42065 119 __ load_const(Z_method, v_off); // Z_method temporarily holds the offset value.
goetz@42065 120 __ z_lg(Z_method/*method oop*/, 0, Z_method/*method offset*/, rcvr_klass/*class oop*/);
goetz@42065 121 }
goetz@42065 122
goetz@42065 123 #ifndef PRODUCT
goetz@42065 124 if (DebugVtables) {
goetz@42065 125 Label L;
goetz@42065 126 __ z_ltgr(Z_method, Z_method);
goetz@42065 127 __ z_brne(L);
goetz@42065 128 __ stop("Vtable entry is ZERO",102);
goetz@42065 129 __ bind(L);
goetz@42065 130 }
goetz@42065 131 #endif
goetz@42065 132
goetz@42065 133 address ame_addr = __ pc(); // ame = abstract method error
goetz@42065 134
goetz@42065 135 // Must do an explicit check if implicit checks are disabled.
goetz@42065 136 __ null_check(Z_method, Z_R1_scratch, in_bytes(Method::from_compiled_offset()));
goetz@42065 137 __ z_lg(Z_R1_scratch, in_bytes(Method::from_compiled_offset()), Z_method);
goetz@42065 138 __ z_br(Z_R1_scratch);
goetz@42065 139
goetz@42065 140 masm->flush();
goetz@42065 141
goetz@42065 142 s->set_exception_points(npe_addr, ame_addr);
goetz@42065 143
goetz@42065 144 return s;
goetz@42065 145 }
goetz@42065 146
mdoerr@48888 147 VtableStub* VtableStubs::create_itable_stub(int itable_index) {
goetz@42065 148 const int code_length = VtableStub::pd_code_size_limit(false);
mdoerr@48888 149 VtableStub *s = new(code_length) VtableStub(false, itable_index);
goetz@42065 150 if (s == NULL) { // Indicates OOM in the code cache.
goetz@42065 151 return NULL;
goetz@42065 152 }
goetz@42065 153
goetz@42065 154 ResourceMark rm;
goetz@42065 155 CodeBuffer cb(s->entry_point(), code_length);
goetz@42065 156 MacroAssembler *masm = new MacroAssembler(&cb);
goetz@42065 157 int padding_bytes = 0;
goetz@42065 158
goetz@42065 159 #if (!defined(PRODUCT) && defined(COMPILER2))
goetz@42065 160 if (CountCompiledCalls) {
goetz@42065 161 // Count unused bytes
goetz@42065 162 // worst case actual size
goetz@42065 163 padding_bytes += __ load_const_size() - __ load_const_optimized_rtn_len(Z_R1_scratch, (long)SharedRuntime::nof_megamorphic_calls_addr(), true);
goetz@42065 164
goetz@42065 165 // Use generic emitter for direct memory increment.
goetz@42065 166 // Use Z_tmp_1 as scratch register for generic emitter.
goetz@42065 167 __ add2mem_32((Z_R1_scratch), 1, Z_tmp_1);
goetz@42065 168 }
goetz@42065 169 #endif
goetz@42065 170
goetz@42065 171 assert(VtableStub::receiver_location() == Z_R2->as_VMReg(), "receiver expected in Z_ARG1");
goetz@42065 172
goetz@42065 173 // Entry arguments:
goetz@42065 174 // Z_method: Interface
goetz@42065 175 // Z_ARG1: Receiver
mdoerr@48888 176 NearLabel no_such_interface;
mdoerr@48888 177 const Register rcvr_klass = Z_tmp_1,
mdoerr@48888 178 interface = Z_tmp_2;
goetz@42065 179
goetz@42065 180 // Get receiver klass.
goetz@42065 181 // Must do an explicit check if implicit checks are disabled.
goetz@42065 182 address npe_addr = __ pc(); // npe == NULL ptr exception
goetz@42065 183 __ null_check(Z_ARG1, Z_R1_scratch, oopDesc::klass_offset_in_bytes());
goetz@42065 184 __ load_klass(rcvr_klass, Z_ARG1);
goetz@42065 185
mdoerr@48888 186 // Receiver subtype check against REFC.
mdoerr@48888 187 __ z_lg(interface, Address(Z_method, CompiledICHolder::holder_klass_offset()));
mdoerr@48888 188 __ lookup_interface_method(rcvr_klass, interface, noreg,
mdoerr@48888 189 noreg, Z_R1, no_such_interface, /*return_method=*/ false);
goetz@42065 190
mdoerr@48888 191 // Get Method* and entrypoint for compiler
mdoerr@48888 192 __ z_lg(interface, Address(Z_method, CompiledICHolder::holder_metadata_offset()));
mdoerr@48888 193 __ lookup_interface_method(rcvr_klass, interface, itable_index,
mdoerr@48888 194 Z_method, Z_R1, no_such_interface, /*return_method=*/ true);
goetz@42065 195
goetz@42065 196 #ifndef PRODUCT
goetz@42065 197 if (DebugVtables) {
goetz@42065 198 Label ok1;
goetz@42065 199 __ z_ltgr(Z_method, Z_method);
goetz@42065 200 __ z_brne(ok1);
goetz@42065 201 __ stop("method is null",103);
goetz@42065 202 __ bind(ok1);
goetz@42065 203 }
goetz@42065 204 #endif
goetz@42065 205
goetz@42065 206 address ame_addr = __ pc();
goetz@42065 207 // Must do an explicit check if implicit checks are disabled.
goetz@42065 208 if (!ImplicitNullChecks) {
mdoerr@48888 209 __ compare64_and_branch(Z_method, (intptr_t) 0, Assembler::bcondEqual, no_such_interface);
goetz@42065 210 }
goetz@42065 211 __ z_lg(Z_R1_scratch, in_bytes(Method::from_compiled_offset()), Z_method);
goetz@42065 212 __ z_br(Z_R1_scratch);
goetz@42065 213
goetz@42065 214 // Handle IncompatibleClassChangeError in itable stubs.
mdoerr@48888 215 __ bind(no_such_interface);
goetz@42065 216 // Count unused bytes
goetz@42065 217 // worst case actual size
goetz@42065 218 // We force resolving of the call site by jumping to
goetz@42065 219 // the "handle wrong method" stub, and so let the
goetz@42065 220 // interpreter runtime do all the dirty work.
goetz@42065 221 padding_bytes += __ load_const_size() - __ load_const_optimized_rtn_len(Z_R1_scratch, (long)SharedRuntime::get_handle_wrong_method_stub(), true);
goetz@42065 222 __ z_br(Z_R1_scratch);
goetz@42065 223
goetz@42065 224 masm->flush();
goetz@42065 225
goetz@42065 226 s->set_exception_points(npe_addr, ame_addr);
goetz@42065 227 return s;
goetz@42065 228 }
goetz@42065 229
goetz@42065 230 // In order to tune these parameters, run the JVM with VM options
goetz@42065 231 // +PrintMiscellaneous and +WizardMode to see information about
goetz@42065 232 // actual itable stubs. Run it with -Xmx31G -XX:+UseCompressedOops.
goetz@42065 233 int VtableStub::pd_code_size_limit(bool is_vtable_stub) {
goetz@42065 234 int size = DebugVtables ? 216 : 0;
goetz@42065 235 if (CountCompiledCalls) {
goetz@42065 236 size += 6 * 4;
goetz@42065 237 }
mdoerr@48888 238 size += is_vtable_stub ? 36 : 140;
mdoerr@48888 239 if (UseCompressedClassPointers) {
mdoerr@48888 240 size += MacroAssembler::instr_size_for_decode_klass_not_null();
goetz@42065 241 }
mdoerr@48888 242 if (!ImplicitNullChecks) {
mdoerr@48888 243 size += 36;
goetz@42065 244 }
goetz@42065 245 return size;
goetz@42065 246 }
goetz@42065 247
goetz@42065 248 int VtableStub::pd_code_alignment() {
goetz@42065 249 const unsigned int icache_line_size = 32;
goetz@42065 250 return icache_line_size;
goetz@42065 251 }