Tue, 08 Aug 2017 15:57:29 +0800
merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #include "precompiled.hpp" |
aoqi@0 | 26 | #include "asm/macroAssembler.hpp" |
aoqi@0 | 27 | #include "interpreter/interpreter.hpp" |
aoqi@0 | 28 | #include "memory/allocation.inline.hpp" |
aoqi@0 | 29 | #include "prims/methodHandles.hpp" |
aoqi@0 | 30 | |
aoqi@0 | 31 | #define __ _masm-> |
aoqi@0 | 32 | |
aoqi@0 | 33 | #ifdef PRODUCT |
aoqi@0 | 34 | #define BLOCK_COMMENT(str) /* nothing */ |
aoqi@0 | 35 | #define STOP(error) stop(error) |
aoqi@0 | 36 | #else |
aoqi@0 | 37 | #define BLOCK_COMMENT(str) __ block_comment(str) |
aoqi@0 | 38 | #define STOP(error) block_comment(error); __ stop(error) |
aoqi@0 | 39 | #endif |
aoqi@0 | 40 | |
aoqi@0 | 41 | #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") |
aoqi@0 | 42 | |
aoqi@0 | 43 | // Workaround for C++ overloading nastiness on '0' for RegisterOrConstant. |
aoqi@0 | 44 | static RegisterOrConstant constant(int value) { |
aoqi@0 | 45 | return RegisterOrConstant(value); |
aoqi@0 | 46 | } |
aoqi@0 | 47 | |
aoqi@0 | 48 | void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp_reg, Register temp2_reg) { |
aoqi@0 | 49 | if (VerifyMethodHandles) |
aoqi@0 | 50 | verify_klass(_masm, klass_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class), temp_reg, temp2_reg, |
aoqi@0 | 51 | "MH argument is a Class"); |
aoqi@0 | 52 | __ ld_ptr(Address(klass_reg, java_lang_Class::klass_offset_in_bytes()), klass_reg); |
aoqi@0 | 53 | } |
aoqi@0 | 54 | |
aoqi@0 | 55 | #ifdef ASSERT |
aoqi@0 | 56 | static int check_nonzero(const char* xname, int x) { |
aoqi@0 | 57 | assert(x != 0, err_msg("%s should be nonzero", xname)); |
aoqi@0 | 58 | return x; |
aoqi@0 | 59 | } |
aoqi@0 | 60 | #define NONZERO(x) check_nonzero(#x, x) |
aoqi@0 | 61 | #else //ASSERT |
aoqi@0 | 62 | #define NONZERO(x) (x) |
aoqi@0 | 63 | #endif //ASSERT |
aoqi@0 | 64 | |
aoqi@0 | 65 | #ifdef ASSERT |
aoqi@0 | 66 | void MethodHandles::verify_klass(MacroAssembler* _masm, |
aoqi@0 | 67 | Register obj_reg, SystemDictionary::WKID klass_id, |
aoqi@0 | 68 | Register temp_reg, Register temp2_reg, |
aoqi@0 | 69 | const char* error_message) { |
aoqi@0 | 70 | Klass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id); |
aoqi@0 | 71 | KlassHandle klass = SystemDictionary::well_known_klass(klass_id); |
aoqi@0 | 72 | bool did_save = false; |
aoqi@0 | 73 | if (temp_reg == noreg || temp2_reg == noreg) { |
aoqi@0 | 74 | temp_reg = L1; |
aoqi@0 | 75 | temp2_reg = L2; |
aoqi@0 | 76 | __ save_frame_and_mov(0, obj_reg, L0); |
aoqi@0 | 77 | obj_reg = L0; |
aoqi@0 | 78 | did_save = true; |
aoqi@0 | 79 | } |
aoqi@0 | 80 | Label L_ok, L_bad; |
aoqi@0 | 81 | BLOCK_COMMENT("verify_klass {"); |
aoqi@0 | 82 | __ verify_oop(obj_reg); |
aoqi@0 | 83 | __ br_null_short(obj_reg, Assembler::pn, L_bad); |
aoqi@0 | 84 | __ load_klass(obj_reg, temp_reg); |
aoqi@0 | 85 | __ set(ExternalAddress((Metadata**)klass_addr), temp2_reg); |
aoqi@0 | 86 | __ ld_ptr(Address(temp2_reg, 0), temp2_reg); |
aoqi@0 | 87 | __ cmp_and_brx_short(temp_reg, temp2_reg, Assembler::equal, Assembler::pt, L_ok); |
aoqi@0 | 88 | intptr_t super_check_offset = klass->super_check_offset(); |
aoqi@0 | 89 | __ ld_ptr(Address(temp_reg, super_check_offset), temp_reg); |
aoqi@0 | 90 | __ set(ExternalAddress((Metadata**)klass_addr), temp2_reg); |
aoqi@0 | 91 | __ ld_ptr(Address(temp2_reg, 0), temp2_reg); |
aoqi@0 | 92 | __ cmp_and_brx_short(temp_reg, temp2_reg, Assembler::equal, Assembler::pt, L_ok); |
aoqi@0 | 93 | __ BIND(L_bad); |
aoqi@0 | 94 | if (did_save) __ restore(); |
aoqi@0 | 95 | __ STOP(error_message); |
aoqi@0 | 96 | __ BIND(L_ok); |
aoqi@0 | 97 | if (did_save) __ restore(); |
aoqi@0 | 98 | BLOCK_COMMENT("} verify_klass"); |
aoqi@0 | 99 | } |
aoqi@0 | 100 | |
aoqi@0 | 101 | void MethodHandles::verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) { |
aoqi@0 | 102 | Label L; |
aoqi@0 | 103 | BLOCK_COMMENT("verify_ref_kind {"); |
aoqi@0 | 104 | __ lduw(Address(member_reg, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes())), temp); |
aoqi@0 | 105 | __ srl( temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT, temp); |
aoqi@0 | 106 | __ and3(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK, temp); |
aoqi@0 | 107 | __ cmp_and_br_short(temp, ref_kind, Assembler::equal, Assembler::pt, L); |
aoqi@0 | 108 | { char* buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal); |
aoqi@0 | 109 | jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind); |
aoqi@0 | 110 | if (ref_kind == JVM_REF_invokeVirtual || |
aoqi@0 | 111 | ref_kind == JVM_REF_invokeSpecial) |
aoqi@0 | 112 | // could do this for all ref_kinds, but would explode assembly code size |
aoqi@0 | 113 | trace_method_handle(_masm, buf); |
aoqi@0 | 114 | __ STOP(buf); |
aoqi@0 | 115 | } |
aoqi@0 | 116 | BLOCK_COMMENT("} verify_ref_kind"); |
aoqi@0 | 117 | __ bind(L); |
aoqi@0 | 118 | } |
aoqi@0 | 119 | |
aoqi@0 | 120 | #endif // ASSERT |
aoqi@0 | 121 | |
aoqi@0 | 122 | void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register target, Register temp, |
aoqi@0 | 123 | bool for_compiler_entry) { |
aoqi@0 | 124 | Label L_no_such_method; |
aoqi@0 | 125 | assert(method == G5_method, "interpreter calling convention"); |
aoqi@0 | 126 | assert_different_registers(method, target, temp); |
aoqi@0 | 127 | |
aoqi@0 | 128 | if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) { |
aoqi@0 | 129 | Label run_compiled_code; |
aoqi@0 | 130 | // JVMTI events, such as single-stepping, are implemented partly by avoiding running |
aoqi@0 | 131 | // compiled code in threads for which the event is enabled. Check here for |
aoqi@0 | 132 | // interp_only_mode if these events CAN be enabled. |
aoqi@0 | 133 | __ verify_thread(); |
aoqi@0 | 134 | const Address interp_only(G2_thread, JavaThread::interp_only_mode_offset()); |
aoqi@0 | 135 | __ ld(interp_only, temp); |
aoqi@0 | 136 | __ cmp_and_br_short(temp, 0, Assembler::zero, Assembler::pt, run_compiled_code); |
aoqi@0 | 137 | // Null method test is replicated below in compiled case, |
aoqi@0 | 138 | // it might be able to address across the verify_thread() |
aoqi@0 | 139 | __ br_null_short(G5_method, Assembler::pn, L_no_such_method); |
aoqi@0 | 140 | __ ld_ptr(G5_method, in_bytes(Method::interpreter_entry_offset()), target); |
aoqi@0 | 141 | __ jmp(target, 0); |
aoqi@0 | 142 | __ delayed()->nop(); |
aoqi@0 | 143 | __ BIND(run_compiled_code); |
aoqi@0 | 144 | // Note: we could fill some delay slots here, but |
aoqi@0 | 145 | // it doesn't matter, since this is interpreter code. |
aoqi@0 | 146 | } |
aoqi@0 | 147 | |
aoqi@0 | 148 | // Compiled case, either static or fall-through from runtime conditional |
aoqi@0 | 149 | __ br_null_short(G5_method, Assembler::pn, L_no_such_method); |
aoqi@0 | 150 | |
aoqi@0 | 151 | const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() : |
aoqi@0 | 152 | Method::from_interpreted_offset(); |
aoqi@0 | 153 | __ ld_ptr(G5_method, in_bytes(entry_offset), target); |
aoqi@0 | 154 | __ jmp(target, 0); |
aoqi@0 | 155 | __ delayed()->nop(); |
aoqi@0 | 156 | |
aoqi@0 | 157 | __ bind(L_no_such_method); |
aoqi@0 | 158 | AddressLiteral ame(StubRoutines::throw_AbstractMethodError_entry()); |
aoqi@0 | 159 | __ jump_to(ame, temp); |
aoqi@0 | 160 | __ delayed()->nop(); |
aoqi@0 | 161 | } |
aoqi@0 | 162 | |
aoqi@0 | 163 | void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm, |
aoqi@0 | 164 | Register recv, Register method_temp, |
aoqi@0 | 165 | Register temp2, Register temp3, |
aoqi@0 | 166 | bool for_compiler_entry) { |
aoqi@0 | 167 | BLOCK_COMMENT("jump_to_lambda_form {"); |
aoqi@0 | 168 | // This is the initial entry point of a lazy method handle. |
aoqi@0 | 169 | // After type checking, it picks up the invoker from the LambdaForm. |
aoqi@0 | 170 | assert_different_registers(recv, method_temp, temp2); // temp3 is only passed on |
aoqi@0 | 171 | assert(method_temp == G5_method, "required register for loading method"); |
aoqi@0 | 172 | |
aoqi@0 | 173 | //NOT_PRODUCT({ FlagSetting fs(TraceMethodHandles, true); trace_method_handle(_masm, "LZMH"); }); |
aoqi@0 | 174 | |
aoqi@0 | 175 | // Load the invoker, as MH -> MH.form -> LF.vmentry |
aoqi@0 | 176 | __ verify_oop(recv); |
aoqi@0 | 177 | __ load_heap_oop(Address(recv, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes())), method_temp); |
aoqi@0 | 178 | __ verify_oop(method_temp); |
aoqi@0 | 179 | __ load_heap_oop(Address(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes())), method_temp); |
aoqi@0 | 180 | __ verify_oop(method_temp); |
aoqi@0 | 181 | // the following assumes that a Method* is normally compressed in the vmtarget field: |
aoqi@0 | 182 | __ ld_ptr( Address(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes())), method_temp); |
aoqi@0 | 183 | |
aoqi@0 | 184 | if (VerifyMethodHandles && !for_compiler_entry) { |
aoqi@0 | 185 | // make sure recv is already on stack |
aoqi@0 | 186 | __ ld_ptr(method_temp, in_bytes(Method::const_offset()), temp2); |
aoqi@0 | 187 | __ load_sized_value(Address(temp2, ConstMethod::size_of_parameters_offset()), |
aoqi@0 | 188 | temp2, |
aoqi@0 | 189 | sizeof(u2), /*is_signed*/ false); |
aoqi@0 | 190 | // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), ""); |
aoqi@0 | 191 | Label L; |
aoqi@0 | 192 | __ ld_ptr(__ argument_address(temp2, temp2, -1), temp2); |
aoqi@0 | 193 | __ cmp_and_br_short(temp2, recv, Assembler::equal, Assembler::pt, L); |
aoqi@0 | 194 | __ STOP("receiver not on stack"); |
aoqi@0 | 195 | __ BIND(L); |
aoqi@0 | 196 | } |
aoqi@0 | 197 | |
aoqi@0 | 198 | jump_from_method_handle(_masm, method_temp, temp2, temp3, for_compiler_entry); |
aoqi@0 | 199 | BLOCK_COMMENT("} jump_to_lambda_form"); |
aoqi@0 | 200 | } |
aoqi@0 | 201 | |
aoqi@0 | 202 | |
aoqi@0 | 203 | // Code generation |
aoqi@0 | 204 | address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm, |
aoqi@0 | 205 | vmIntrinsics::ID iid) { |
aoqi@0 | 206 | const bool not_for_compiler_entry = false; // this is the interpreter entry |
aoqi@0 | 207 | assert(is_signature_polymorphic(iid), "expected invoke iid"); |
aoqi@0 | 208 | if (iid == vmIntrinsics::_invokeGeneric || |
aoqi@0 | 209 | iid == vmIntrinsics::_compiledLambdaForm) { |
aoqi@0 | 210 | // Perhaps surprisingly, the symbolic references visible to Java are not directly used. |
aoqi@0 | 211 | // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod. |
aoqi@0 | 212 | // They all allow an appendix argument. |
aoqi@0 | 213 | __ should_not_reach_here(); // empty stubs make SG sick |
aoqi@0 | 214 | return NULL; |
aoqi@0 | 215 | } |
aoqi@0 | 216 | |
aoqi@0 | 217 | // I5_savedSP/O5_savedSP: sender SP (must preserve; see prepare_to_jump_from_interpreted) |
aoqi@0 | 218 | // G5_method: Method* |
aoqi@0 | 219 | // G4 (Gargs): incoming argument list (must preserve) |
aoqi@0 | 220 | // O0: used as temp to hold mh or receiver |
aoqi@0 | 221 | // O1, O4: garbage temps, blown away |
aoqi@0 | 222 | Register O1_scratch = O1; |
aoqi@0 | 223 | Register O4_param_size = O4; // size of parameters |
aoqi@0 | 224 | |
aoqi@0 | 225 | // here's where control starts out: |
aoqi@0 | 226 | __ align(CodeEntryAlignment); |
aoqi@0 | 227 | address entry_point = __ pc(); |
aoqi@0 | 228 | |
aoqi@0 | 229 | if (VerifyMethodHandles) { |
aoqi@0 | 230 | Label L; |
aoqi@0 | 231 | BLOCK_COMMENT("verify_intrinsic_id {"); |
aoqi@0 | 232 | __ ldub(Address(G5_method, Method::intrinsic_id_offset_in_bytes()), O1_scratch); |
aoqi@0 | 233 | __ cmp_and_br_short(O1_scratch, (int) iid, Assembler::equal, Assembler::pt, L); |
aoqi@0 | 234 | if (iid == vmIntrinsics::_linkToVirtual || |
aoqi@0 | 235 | iid == vmIntrinsics::_linkToSpecial) { |
aoqi@0 | 236 | // could do this for all kinds, but would explode assembly code size |
aoqi@0 | 237 | trace_method_handle(_masm, "bad Method*::intrinsic_id"); |
aoqi@0 | 238 | } |
aoqi@0 | 239 | __ STOP("bad Method*::intrinsic_id"); |
aoqi@0 | 240 | __ bind(L); |
aoqi@0 | 241 | BLOCK_COMMENT("} verify_intrinsic_id"); |
aoqi@0 | 242 | } |
aoqi@0 | 243 | |
aoqi@0 | 244 | // First task: Find out how big the argument list is. |
aoqi@0 | 245 | Address O4_first_arg_addr; |
aoqi@0 | 246 | int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid); |
aoqi@0 | 247 | assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic"); |
aoqi@0 | 248 | if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) { |
aoqi@0 | 249 | __ ld_ptr(G5_method, in_bytes(Method::const_offset()), O4_param_size); |
aoqi@0 | 250 | __ load_sized_value(Address(O4_param_size, ConstMethod::size_of_parameters_offset()), |
aoqi@0 | 251 | O4_param_size, |
aoqi@0 | 252 | sizeof(u2), /*is_signed*/ false); |
aoqi@0 | 253 | // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), ""); |
aoqi@0 | 254 | O4_first_arg_addr = __ argument_address(O4_param_size, O4_param_size, -1); |
aoqi@0 | 255 | } else { |
aoqi@0 | 256 | DEBUG_ONLY(O4_param_size = noreg); |
aoqi@0 | 257 | } |
aoqi@0 | 258 | |
aoqi@0 | 259 | Register O0_mh = noreg; |
aoqi@0 | 260 | if (!is_signature_polymorphic_static(iid)) { |
aoqi@0 | 261 | __ ld_ptr(O4_first_arg_addr, O0_mh = O0); |
aoqi@0 | 262 | DEBUG_ONLY(O4_param_size = noreg); |
aoqi@0 | 263 | } |
aoqi@0 | 264 | |
aoqi@0 | 265 | // O4_first_arg_addr is live! |
aoqi@0 | 266 | |
aoqi@0 | 267 | if (TraceMethodHandles) { |
aoqi@0 | 268 | if (O0_mh != noreg) |
aoqi@0 | 269 | __ mov(O0_mh, G3_method_handle); // make stub happy |
aoqi@0 | 270 | trace_method_handle_interpreter_entry(_masm, iid); |
aoqi@0 | 271 | } |
aoqi@0 | 272 | |
aoqi@0 | 273 | if (iid == vmIntrinsics::_invokeBasic) { |
aoqi@0 | 274 | generate_method_handle_dispatch(_masm, iid, O0_mh, noreg, not_for_compiler_entry); |
aoqi@0 | 275 | |
aoqi@0 | 276 | } else { |
aoqi@0 | 277 | // Adjust argument list by popping the trailing MemberName argument. |
aoqi@0 | 278 | Register O0_recv = noreg; |
aoqi@0 | 279 | if (MethodHandles::ref_kind_has_receiver(ref_kind)) { |
aoqi@0 | 280 | // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack. |
aoqi@0 | 281 | __ ld_ptr(O4_first_arg_addr, O0_recv = O0); |
aoqi@0 | 282 | DEBUG_ONLY(O4_param_size = noreg); |
aoqi@0 | 283 | } |
aoqi@0 | 284 | Register G5_member = G5_method; // MemberName ptr; incoming method ptr is dead now |
aoqi@0 | 285 | __ ld_ptr(__ argument_address(constant(0)), G5_member); |
aoqi@0 | 286 | __ add(Gargs, Interpreter::stackElementSize, Gargs); |
aoqi@0 | 287 | generate_method_handle_dispatch(_masm, iid, O0_recv, G5_member, not_for_compiler_entry); |
aoqi@0 | 288 | } |
aoqi@0 | 289 | |
aoqi@0 | 290 | return entry_point; |
aoqi@0 | 291 | } |
aoqi@0 | 292 | |
aoqi@0 | 293 | void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm, |
aoqi@0 | 294 | vmIntrinsics::ID iid, |
aoqi@0 | 295 | Register receiver_reg, |
aoqi@0 | 296 | Register member_reg, |
aoqi@0 | 297 | bool for_compiler_entry) { |
aoqi@0 | 298 | assert(is_signature_polymorphic(iid), "expected invoke iid"); |
aoqi@0 | 299 | Register temp1 = (for_compiler_entry ? G1_scratch : O1); |
aoqi@0 | 300 | Register temp2 = (for_compiler_entry ? G3_scratch : O2); |
aoqi@0 | 301 | Register temp3 = (for_compiler_entry ? G4_scratch : O3); |
aoqi@0 | 302 | Register temp4 = (for_compiler_entry ? noreg : O4); |
aoqi@0 | 303 | if (for_compiler_entry) { |
aoqi@0 | 304 | assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : O0), "only valid assignment"); |
aoqi@0 | 305 | assert_different_registers(temp1, O0, O1, O2, O3, O4, O5); |
aoqi@0 | 306 | assert_different_registers(temp2, O0, O1, O2, O3, O4, O5); |
aoqi@0 | 307 | assert_different_registers(temp3, O0, O1, O2, O3, O4, O5); |
aoqi@0 | 308 | assert_different_registers(temp4, O0, O1, O2, O3, O4, O5); |
aoqi@0 | 309 | } else { |
aoqi@0 | 310 | assert_different_registers(temp1, temp2, temp3, temp4, O5_savedSP); // don't trash lastSP |
aoqi@0 | 311 | } |
aoqi@0 | 312 | if (receiver_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, receiver_reg); |
aoqi@0 | 313 | if (member_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, member_reg); |
aoqi@0 | 314 | |
aoqi@0 | 315 | if (iid == vmIntrinsics::_invokeBasic) { |
aoqi@0 | 316 | // indirect through MH.form.vmentry.vmtarget |
aoqi@0 | 317 | jump_to_lambda_form(_masm, receiver_reg, G5_method, temp1, temp2, for_compiler_entry); |
aoqi@0 | 318 | |
aoqi@0 | 319 | } else { |
aoqi@0 | 320 | // The method is a member invoker used by direct method handles. |
aoqi@0 | 321 | if (VerifyMethodHandles) { |
aoqi@0 | 322 | // make sure the trailing argument really is a MemberName (caller responsibility) |
aoqi@0 | 323 | verify_klass(_masm, member_reg, SystemDictionary::WK_KLASS_ENUM_NAME(MemberName_klass), |
aoqi@0 | 324 | temp1, temp2, |
aoqi@0 | 325 | "MemberName required for invokeVirtual etc."); |
aoqi@0 | 326 | } |
aoqi@0 | 327 | |
aoqi@0 | 328 | Address member_clazz( member_reg, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes())); |
aoqi@0 | 329 | Address member_vmindex( member_reg, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes())); |
aoqi@0 | 330 | Address member_vmtarget( member_reg, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes())); |
aoqi@0 | 331 | |
aoqi@0 | 332 | Register temp1_recv_klass = temp1; |
aoqi@0 | 333 | if (iid != vmIntrinsics::_linkToStatic) { |
aoqi@0 | 334 | __ verify_oop(receiver_reg); |
aoqi@0 | 335 | if (iid == vmIntrinsics::_linkToSpecial) { |
aoqi@0 | 336 | // Don't actually load the klass; just null-check the receiver. |
aoqi@0 | 337 | __ null_check(receiver_reg); |
aoqi@0 | 338 | } else { |
aoqi@0 | 339 | // load receiver klass itself |
aoqi@0 | 340 | __ null_check(receiver_reg, oopDesc::klass_offset_in_bytes()); |
aoqi@0 | 341 | __ load_klass(receiver_reg, temp1_recv_klass); |
aoqi@0 | 342 | __ verify_klass_ptr(temp1_recv_klass); |
aoqi@0 | 343 | } |
aoqi@0 | 344 | BLOCK_COMMENT("check_receiver {"); |
aoqi@0 | 345 | // The receiver for the MemberName must be in receiver_reg. |
aoqi@0 | 346 | // Check the receiver against the MemberName.clazz |
aoqi@0 | 347 | if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) { |
aoqi@0 | 348 | // Did not load it above... |
aoqi@0 | 349 | __ load_klass(receiver_reg, temp1_recv_klass); |
aoqi@0 | 350 | __ verify_klass_ptr(temp1_recv_klass); |
aoqi@0 | 351 | } |
aoqi@0 | 352 | if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) { |
aoqi@0 | 353 | Label L_ok; |
aoqi@0 | 354 | Register temp2_defc = temp2; |
aoqi@0 | 355 | __ load_heap_oop(member_clazz, temp2_defc); |
aoqi@0 | 356 | load_klass_from_Class(_masm, temp2_defc, temp3, temp4); |
aoqi@0 | 357 | __ verify_klass_ptr(temp2_defc); |
aoqi@0 | 358 | __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, temp4, L_ok); |
aoqi@0 | 359 | // If we get here, the type check failed! |
aoqi@0 | 360 | __ STOP("receiver class disagrees with MemberName.clazz"); |
aoqi@0 | 361 | __ bind(L_ok); |
aoqi@0 | 362 | } |
aoqi@0 | 363 | BLOCK_COMMENT("} check_receiver"); |
aoqi@0 | 364 | } |
aoqi@0 | 365 | if (iid == vmIntrinsics::_linkToSpecial || |
aoqi@0 | 366 | iid == vmIntrinsics::_linkToStatic) { |
aoqi@0 | 367 | DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass |
aoqi@0 | 368 | } |
aoqi@0 | 369 | |
aoqi@0 | 370 | // Live registers at this point: |
aoqi@0 | 371 | // member_reg - MemberName that was the trailing argument |
aoqi@0 | 372 | // temp1_recv_klass - klass of stacked receiver, if needed |
aoqi@0 | 373 | // O5_savedSP - interpreter linkage (if interpreted) |
aoqi@0 | 374 | // O0..O5 - compiler arguments (if compiled) |
aoqi@0 | 375 | |
aoqi@0 | 376 | Label L_incompatible_class_change_error; |
aoqi@0 | 377 | switch (iid) { |
aoqi@0 | 378 | case vmIntrinsics::_linkToSpecial: |
aoqi@0 | 379 | if (VerifyMethodHandles) { |
aoqi@0 | 380 | verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp2); |
aoqi@0 | 381 | } |
aoqi@0 | 382 | __ ld_ptr(member_vmtarget, G5_method); |
aoqi@0 | 383 | break; |
aoqi@0 | 384 | |
aoqi@0 | 385 | case vmIntrinsics::_linkToStatic: |
aoqi@0 | 386 | if (VerifyMethodHandles) { |
aoqi@0 | 387 | verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp2); |
aoqi@0 | 388 | } |
aoqi@0 | 389 | __ ld_ptr(member_vmtarget, G5_method); |
aoqi@0 | 390 | break; |
aoqi@0 | 391 | |
aoqi@0 | 392 | case vmIntrinsics::_linkToVirtual: |
aoqi@0 | 393 | { |
aoqi@0 | 394 | // same as TemplateTable::invokevirtual, |
aoqi@0 | 395 | // minus the CP setup and profiling: |
aoqi@0 | 396 | |
aoqi@0 | 397 | if (VerifyMethodHandles) { |
aoqi@0 | 398 | verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp2); |
aoqi@0 | 399 | } |
aoqi@0 | 400 | |
aoqi@0 | 401 | // pick out the vtable index from the MemberName, and then we can discard it: |
aoqi@0 | 402 | Register temp2_index = temp2; |
aoqi@0 | 403 | __ ld_ptr(member_vmindex, temp2_index); |
aoqi@0 | 404 | |
aoqi@0 | 405 | if (VerifyMethodHandles) { |
aoqi@0 | 406 | Label L_index_ok; |
aoqi@0 | 407 | __ cmp_and_br_short(temp2_index, (int) 0, Assembler::greaterEqual, Assembler::pn, L_index_ok); |
aoqi@0 | 408 | __ STOP("no virtual index"); |
aoqi@0 | 409 | __ BIND(L_index_ok); |
aoqi@0 | 410 | } |
aoqi@0 | 411 | |
aoqi@0 | 412 | // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget |
aoqi@0 | 413 | // at this point. And VerifyMethodHandles has already checked clazz, if needed. |
aoqi@0 | 414 | |
aoqi@0 | 415 | // get target Method* & entry point |
aoqi@0 | 416 | __ lookup_virtual_method(temp1_recv_klass, temp2_index, G5_method); |
aoqi@0 | 417 | break; |
aoqi@0 | 418 | } |
aoqi@0 | 419 | |
aoqi@0 | 420 | case vmIntrinsics::_linkToInterface: |
aoqi@0 | 421 | { |
aoqi@0 | 422 | // same as TemplateTable::invokeinterface |
aoqi@0 | 423 | // (minus the CP setup and profiling, with different argument motion) |
aoqi@0 | 424 | if (VerifyMethodHandles) { |
aoqi@0 | 425 | verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp2); |
aoqi@0 | 426 | } |
aoqi@0 | 427 | |
aoqi@0 | 428 | Register temp2_intf = temp2; |
aoqi@0 | 429 | __ load_heap_oop(member_clazz, temp2_intf); |
aoqi@0 | 430 | load_klass_from_Class(_masm, temp2_intf, temp3, temp4); |
aoqi@0 | 431 | __ verify_klass_ptr(temp2_intf); |
aoqi@0 | 432 | |
aoqi@0 | 433 | Register G5_index = G5_method; |
aoqi@0 | 434 | __ ld_ptr(member_vmindex, G5_index); |
aoqi@0 | 435 | if (VerifyMethodHandles) { |
aoqi@0 | 436 | Label L; |
aoqi@0 | 437 | __ cmp_and_br_short(G5_index, 0, Assembler::greaterEqual, Assembler::pt, L); |
aoqi@0 | 438 | __ STOP("invalid vtable index for MH.invokeInterface"); |
aoqi@0 | 439 | __ bind(L); |
aoqi@0 | 440 | } |
aoqi@0 | 441 | |
aoqi@0 | 442 | // given intf, index, and recv klass, dispatch to the implementation method |
aoqi@0 | 443 | __ lookup_interface_method(temp1_recv_klass, temp2_intf, |
aoqi@0 | 444 | // note: next two args must be the same: |
aoqi@0 | 445 | G5_index, G5_method, |
aoqi@0 | 446 | temp3, temp4, |
aoqi@0 | 447 | L_incompatible_class_change_error); |
aoqi@0 | 448 | break; |
aoqi@0 | 449 | } |
aoqi@0 | 450 | |
aoqi@0 | 451 | default: |
aoqi@0 | 452 | fatal(err_msg_res("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid))); |
aoqi@0 | 453 | break; |
aoqi@0 | 454 | } |
aoqi@0 | 455 | |
aoqi@0 | 456 | // Live at this point: |
aoqi@0 | 457 | // G5_method |
aoqi@0 | 458 | // O5_savedSP (if interpreted) |
aoqi@0 | 459 | |
aoqi@0 | 460 | // After figuring out which concrete method to call, jump into it. |
aoqi@0 | 461 | // Note that this works in the interpreter with no data motion. |
aoqi@0 | 462 | // But the compiled version will require that rcx_recv be shifted out. |
aoqi@0 | 463 | __ verify_method_ptr(G5_method); |
aoqi@0 | 464 | jump_from_method_handle(_masm, G5_method, temp1, temp2, for_compiler_entry); |
aoqi@0 | 465 | |
aoqi@0 | 466 | if (iid == vmIntrinsics::_linkToInterface) { |
aoqi@0 | 467 | __ BIND(L_incompatible_class_change_error); |
aoqi@0 | 468 | AddressLiteral icce(StubRoutines::throw_IncompatibleClassChangeError_entry()); |
aoqi@0 | 469 | __ jump_to(icce, temp1); |
aoqi@0 | 470 | __ delayed()->nop(); |
aoqi@0 | 471 | } |
aoqi@0 | 472 | } |
aoqi@0 | 473 | } |
aoqi@0 | 474 | |
aoqi@0 | 475 | #ifndef PRODUCT |
aoqi@0 | 476 | void trace_method_handle_stub(const char* adaptername, |
aoqi@0 | 477 | oopDesc* mh, |
aoqi@0 | 478 | intptr_t* saved_sp, |
aoqi@0 | 479 | intptr_t* args, |
aoqi@0 | 480 | intptr_t* tracing_fp) { |
aoqi@0 | 481 | bool has_mh = (strstr(adaptername, "/static") == NULL && |
aoqi@0 | 482 | strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH |
aoqi@0 | 483 | const char* mh_reg_name = has_mh ? "G3_mh" : "G3"; |
aoqi@0 | 484 | tty->print_cr("MH %s %s="INTPTR_FORMAT " saved_sp=" INTPTR_FORMAT " args=" INTPTR_FORMAT, |
aoqi@0 | 485 | adaptername, mh_reg_name, |
aoqi@0 | 486 | (intptr_t) mh, saved_sp, args); |
aoqi@0 | 487 | |
aoqi@0 | 488 | if (Verbose) { |
aoqi@0 | 489 | // dumping last frame with frame::describe |
aoqi@0 | 490 | |
aoqi@0 | 491 | JavaThread* p = JavaThread::active(); |
aoqi@0 | 492 | |
aoqi@0 | 493 | ResourceMark rm; |
aoqi@0 | 494 | PRESERVE_EXCEPTION_MARK; // may not be needed by safer and unexpensive here |
aoqi@0 | 495 | FrameValues values; |
aoqi@0 | 496 | |
aoqi@0 | 497 | // Note: We want to allow trace_method_handle from any call site. |
aoqi@0 | 498 | // While trace_method_handle creates a frame, it may be entered |
aoqi@0 | 499 | // without a valid return PC in O7 (e.g. not just after a call). |
aoqi@0 | 500 | // Walking that frame could lead to failures due to that invalid PC. |
aoqi@0 | 501 | // => carefully detect that frame when doing the stack walking |
aoqi@0 | 502 | |
aoqi@0 | 503 | // walk up to the right frame using the "tracing_fp" argument |
aoqi@0 | 504 | intptr_t* cur_sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); |
aoqi@0 | 505 | frame cur_frame(cur_sp, frame::unpatchable, NULL); |
aoqi@0 | 506 | |
aoqi@0 | 507 | while (cur_frame.fp() != (intptr_t *)(STACK_BIAS+(uintptr_t)tracing_fp)) { |
aoqi@0 | 508 | cur_frame = os::get_sender_for_C_frame(&cur_frame); |
aoqi@0 | 509 | } |
aoqi@0 | 510 | |
aoqi@0 | 511 | // safely create a frame and call frame::describe |
aoqi@0 | 512 | intptr_t *dump_sp = cur_frame.sender_sp(); |
aoqi@0 | 513 | intptr_t *dump_fp = cur_frame.link(); |
aoqi@0 | 514 | |
aoqi@0 | 515 | bool walkable = has_mh; // whether the traced frame shoud be walkable |
aoqi@0 | 516 | |
aoqi@0 | 517 | // the sender for cur_frame is the caller of trace_method_handle |
aoqi@0 | 518 | if (walkable) { |
aoqi@0 | 519 | // The previous definition of walkable may have to be refined |
aoqi@0 | 520 | // if new call sites cause the next frame constructor to start |
aoqi@0 | 521 | // failing. Alternatively, frame constructors could be |
aoqi@0 | 522 | // modified to support the current or future non walkable |
aoqi@0 | 523 | // frames (but this is more intrusive and is not considered as |
aoqi@0 | 524 | // part of this RFE, which will instead use a simpler output). |
aoqi@0 | 525 | frame dump_frame = frame(dump_sp, |
aoqi@0 | 526 | cur_frame.sp(), // younger_sp |
aoqi@0 | 527 | false); // no adaptation |
aoqi@0 | 528 | dump_frame.describe(values, 1); |
aoqi@0 | 529 | } else { |
aoqi@0 | 530 | // Robust dump for frames which cannot be constructed from sp/younger_sp |
aoqi@0 | 531 | // Add descriptions without building a Java frame to avoid issues |
aoqi@0 | 532 | values.describe(-1, dump_fp, "fp for #1 <not parsed, cannot trust pc>"); |
aoqi@0 | 533 | values.describe(-1, dump_sp, "sp"); |
aoqi@0 | 534 | } |
aoqi@0 | 535 | |
aoqi@0 | 536 | bool has_args = has_mh; // whether Gargs is meaningful |
aoqi@0 | 537 | |
aoqi@0 | 538 | // mark args, if seems valid (may not be valid for some adapters) |
aoqi@0 | 539 | if (has_args) { |
aoqi@0 | 540 | if ((args >= dump_sp) && (args < dump_fp)) { |
aoqi@0 | 541 | values.describe(-1, args, "*G4_args"); |
aoqi@0 | 542 | } |
aoqi@0 | 543 | } |
aoqi@0 | 544 | |
aoqi@0 | 545 | // mark saved_sp, if seems valid (may not be valid for some adapters) |
aoqi@0 | 546 | intptr_t *unbiased_sp = (intptr_t *)(STACK_BIAS+(uintptr_t)saved_sp); |
aoqi@0 | 547 | const int ARG_LIMIT = 255, SLOP = 45, UNREASONABLE_STACK_MOVE = (ARG_LIMIT + SLOP); |
aoqi@0 | 548 | if ((unbiased_sp >= dump_sp - UNREASONABLE_STACK_MOVE) && (unbiased_sp < dump_fp)) { |
aoqi@0 | 549 | values.describe(-1, unbiased_sp, "*saved_sp+STACK_BIAS"); |
aoqi@0 | 550 | } |
aoqi@0 | 551 | |
aoqi@0 | 552 | // Note: the unextended_sp may not be correct |
aoqi@0 | 553 | tty->print_cr(" stack layout:"); |
aoqi@0 | 554 | values.print(p); |
aoqi@0 | 555 | if (has_mh && mh->is_oop()) { |
aoqi@0 | 556 | mh->print(); |
aoqi@0 | 557 | if (java_lang_invoke_MethodHandle::is_instance(mh)) { |
aoqi@0 | 558 | if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0) |
aoqi@0 | 559 | java_lang_invoke_MethodHandle::form(mh)->print(); |
aoqi@0 | 560 | } |
aoqi@0 | 561 | } |
aoqi@0 | 562 | } |
aoqi@0 | 563 | } |
aoqi@0 | 564 | |
aoqi@0 | 565 | void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) { |
aoqi@0 | 566 | if (!TraceMethodHandles) return; |
aoqi@0 | 567 | BLOCK_COMMENT("trace_method_handle {"); |
aoqi@0 | 568 | // save: Gargs, O5_savedSP |
aoqi@0 | 569 | __ save_frame(16); // need space for saving required FPU state |
aoqi@0 | 570 | |
aoqi@0 | 571 | __ set((intptr_t) adaptername, O0); |
aoqi@0 | 572 | __ mov(G3_method_handle, O1); |
aoqi@0 | 573 | __ mov(I5_savedSP, O2); |
aoqi@0 | 574 | __ mov(Gargs, O3); |
aoqi@0 | 575 | __ mov(I6, O4); // frame identifier for safe stack walking |
aoqi@0 | 576 | |
aoqi@0 | 577 | // Save scratched registers that might be needed. Robustness is more |
aoqi@0 | 578 | // important than optimizing the saves for this debug only code. |
aoqi@0 | 579 | |
aoqi@0 | 580 | // save FP result, valid at some call sites (adapter_opt_return_float, ...) |
aoqi@0 | 581 | Address d_save(FP, -sizeof(jdouble) + STACK_BIAS); |
aoqi@0 | 582 | __ stf(FloatRegisterImpl::D, Ftos_d, d_save); |
aoqi@0 | 583 | // Safely save all globals but G2 (handled by call_VM_leaf) and G7 |
aoqi@0 | 584 | // (OS reserved). |
aoqi@0 | 585 | __ mov(G3_method_handle, L3); |
aoqi@0 | 586 | __ mov(Gargs, L4); |
aoqi@0 | 587 | __ mov(G5_method_type, L5); |
aoqi@0 | 588 | __ mov(G6, L6); |
aoqi@0 | 589 | __ mov(G1, L1); |
aoqi@0 | 590 | |
aoqi@0 | 591 | __ call_VM_leaf(L2 /* for G2 */, CAST_FROM_FN_PTR(address, trace_method_handle_stub)); |
aoqi@0 | 592 | |
aoqi@0 | 593 | __ mov(L3, G3_method_handle); |
aoqi@0 | 594 | __ mov(L4, Gargs); |
aoqi@0 | 595 | __ mov(L5, G5_method_type); |
aoqi@0 | 596 | __ mov(L6, G6); |
aoqi@0 | 597 | __ mov(L1, G1); |
aoqi@0 | 598 | __ ldf(FloatRegisterImpl::D, d_save, Ftos_d); |
aoqi@0 | 599 | |
aoqi@0 | 600 | __ restore(); |
aoqi@0 | 601 | BLOCK_COMMENT("} trace_method_handle"); |
aoqi@0 | 602 | } |
aoqi@0 | 603 | #endif // PRODUCT |