1 /* 2 * Copyright (c) 2008, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 // This file mirror as much as possible methodHandles_x86.cpp to ease 26 // cross platform development for JSR292. 27 // Last synchronization: changeset f8c9417e3571 28 29 #include "precompiled.hpp" 30 #include "jvm.h" 31 #include "classfile/javaClasses.inline.hpp" 32 #include "interpreter/interpreter.hpp" 33 #include "interpreter/interpreterRuntime.hpp" 34 #include "memory/allocation.inline.hpp" 35 #include "memory/resourceArea.hpp" 36 #include "prims/methodHandles.hpp" 37 #include "runtime/frame.inline.hpp" 38 #include "utilities/preserveException.hpp" 39 40 #define __ _masm-> 41 42 #ifdef PRODUCT 43 #define BLOCK_COMMENT(str) /* nothing */ 44 #else 45 #define BLOCK_COMMENT(str) __ block_comment(str) 46 #endif 47 48 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") 49 50 void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp1, Register temp2) { 51 if (VerifyMethodHandles) { 52 verify_klass(_masm, klass_reg, temp1, temp2, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class), 53 "MH argument is a Class"); 54 } 55 __ ldr(klass_reg, Address(klass_reg, java_lang_Class::klass_offset_in_bytes())); 56 } 57 58 #ifdef ASSERT 59 static int check_nonzero(const char* xname, int x) { 60 assert(x != 0, "%s should be nonzero", xname); 61 return x; 62 } 63 #define NONZERO(x) check_nonzero(#x, x) 64 #else //ASSERT 65 #define NONZERO(x) (x) 66 #endif //ASSERT 67 68 #ifdef ASSERT 69 void MethodHandles::verify_klass(MacroAssembler* _masm, 70 Register obj, Register temp1, Register temp2, SystemDictionary::WKID klass_id, 71 const char* error_message) { 72 InstanceKlass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id); 73 Klass* klass = SystemDictionary::well_known_klass(klass_id); 74 Label L_ok, L_bad; 75 BLOCK_COMMENT("verify_klass {"); 76 __ verify_oop(obj); 77 __ cbz(obj, L_bad); 78 __ load_klass(temp1, obj); 79 __ lea(temp2, ExternalAddress((address) klass_addr)); 80 __ ldr(temp2, temp2); // the cmpptr on x86 dereferences the AddressLiteral (not lea) 81 __ cmp(temp1, temp2); 82 __ b(L_ok, eq); 83 intptr_t super_check_offset = klass->super_check_offset(); 84 __ ldr(temp1, Address(temp1, super_check_offset)); 85 __ cmp(temp1, temp2); 86 __ b(L_ok, eq); 87 88 __ bind(L_bad); 89 __ stop(error_message); 90 __ BIND(L_ok); 91 BLOCK_COMMENT("} verify_klass"); 92 } 93 94 void MethodHandles::verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) { 95 Label L; 96 BLOCK_COMMENT("verify_ref_kind {"); 97 __ ldr_u32(temp, Address(member_reg, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes()))); 98 __ logical_shift_right(temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT); 99 __ andr(temp, temp, (unsigned)java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK); 100 __ cmp(temp, ref_kind); 101 __ b(L, eq); 102 { char* buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal); 103 jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind); 104 if (ref_kind == JVM_REF_invokeVirtual || 105 ref_kind == JVM_REF_invokeSpecial) 106 // could do this for all ref_kinds, but would explode assembly code size 107 trace_method_handle(_masm, buf); 108 __ stop(buf); 109 } 110 BLOCK_COMMENT("} verify_ref_kind"); 111 __ bind(L); 112 } 113 114 #endif //ASSERT 115 116 void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, bool for_compiler_entry) { 117 Label L_no_such_method; 118 __ cbz(Rmethod, L_no_such_method); 119 120 // Note: JVMTI overhead seems small enough compared to invocation 121 // cost and is not worth the complexity or code size overhead of 122 // supporting several variants of each adapter. 123 if (!for_compiler_entry && (JvmtiExport::can_post_interpreter_events())) { 124 // JVMTI events, such as single-stepping, are implemented partly by avoiding running 125 // compiled code in threads for which the event is enabled. Check here for 126 // interp_only_mode if these events CAN be enabled. 127 __ ldr_s32(Rtemp, Address(Rthread, JavaThread::interp_only_mode_offset())); 128 #ifdef AARCH64 129 Label L; 130 __ cbz(Rtemp, L); 131 __ indirect_jump(Address(Rmethod, Method::interpreter_entry_offset()), Rtemp); 132 __ bind(L); 133 #else 134 __ cmp(Rtemp, 0); 135 __ ldr(PC, Address(Rmethod, Method::interpreter_entry_offset()), ne); 136 #endif // AARCH64 137 } 138 const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() : 139 Method::from_interpreted_offset(); 140 141 __ indirect_jump(Address(Rmethod, entry_offset), Rtemp); 142 143 __ bind(L_no_such_method); 144 // throw exception 145 __ jump(StubRoutines::throw_AbstractMethodError_entry(), relocInfo::runtime_call_type, Rtemp); 146 } 147 148 void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm, 149 Register recv, Register tmp, 150 bool for_compiler_entry) { 151 BLOCK_COMMENT("jump_to_lambda_form {"); 152 // This is the initial entry point of a lazy method handle. 153 // After type checking, it picks up the invoker from the LambdaForm. 154 assert_different_registers(recv, tmp, Rmethod); 155 156 // Load the invoker, as MH -> MH.form -> LF.vmentry 157 __ load_heap_oop(tmp, Address(recv, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()))); 158 __ verify_oop(tmp); 159 160 __ load_heap_oop(tmp, Address(tmp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()))); 161 __ verify_oop(tmp); 162 163 __ load_heap_oop(Rmethod, Address(tmp, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()))); 164 __ verify_oop(Rmethod); 165 __ access_load_at(T_ADDRESS, IN_HEAP, Address(Rmethod, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes())), Rmethod, noreg, noreg, noreg); 166 167 if (VerifyMethodHandles && !for_compiler_entry) { 168 // make sure recv is already on stack 169 __ ldr(tmp, Address(Rmethod, Method::const_offset())); 170 __ load_sized_value(tmp, 171 Address(tmp, ConstMethod::size_of_parameters_offset()), 172 sizeof(u2), /*is_signed*/ false); 173 // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), ""); 174 Label L; 175 __ ldr(tmp, __ receiver_argument_address(Rparams, tmp, tmp)); 176 __ cmp(tmp, recv); 177 __ b(L, eq); 178 __ stop("receiver not on stack"); 179 __ bind(L); 180 } 181 182 jump_from_method_handle(_masm, for_compiler_entry); 183 BLOCK_COMMENT("} jump_to_lambda_form"); 184 } 185 186 187 // Code generation 188 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm, 189 vmIntrinsics::ID iid) { 190 const bool not_for_compiler_entry = false; // this is the interpreter entry 191 assert(is_signature_polymorphic(iid), "expected invoke iid"); 192 if (iid == vmIntrinsics::_invokeGeneric || 193 iid == vmIntrinsics::_compiledLambdaForm) { 194 // Perhaps surprisingly, the user-visible names, and linkToCallSite, are not directly used. 195 // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod. 196 // They all require an extra argument. 197 __ should_not_reach_here(); // empty stubs make SG sick 198 return NULL; 199 } 200 201 // Rmethod: Method* 202 // Rparams (SP on 32-bit ARM): pointer to parameters 203 // Rsender_sp (R4/R19): sender SP (must preserve; see prepare_to_jump_from_interpreted) 204 // R5_mh: receiver method handle (must load from sp[MethodTypeForm.vmslots]) 205 // R1, R2, Rtemp: garbage temp, blown away 206 207 // Use same name as x86 to ease future merges 208 Register rdx_temp = R2_tmp; 209 Register rdx_param_size = rdx_temp; // size of parameters 210 Register rax_temp = R1_tmp; 211 Register rcx_mh = R5_mh; // MH receiver; dies quickly and is recycled 212 Register rbx_method = Rmethod; // eventual target of this invocation 213 Register rdi_temp = Rtemp; 214 215 // here's where control starts out: 216 __ align(CodeEntryAlignment); 217 address entry_point = __ pc(); 218 219 if (VerifyMethodHandles) { 220 Label L; 221 BLOCK_COMMENT("verify_intrinsic_id {"); 222 __ ldrh(rdi_temp, Address(rbx_method, Method::intrinsic_id_offset_in_bytes())); 223 __ sub_slow(rdi_temp, rdi_temp, (int) iid); 224 __ cbz(rdi_temp, L); 225 if (iid == vmIntrinsics::_linkToVirtual || 226 iid == vmIntrinsics::_linkToSpecial) { 227 // could do this for all kinds, but would explode assembly code size 228 trace_method_handle(_masm, "bad Method*::intrinsic_id"); 229 } 230 __ stop("bad Method*::intrinsic_id"); 231 __ bind(L); 232 BLOCK_COMMENT("} verify_intrinsic_id"); 233 } 234 235 // First task: Find out how big the argument list is. 236 Address rdx_first_arg_addr; 237 int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid); 238 assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic"); 239 if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) { 240 __ ldr(rdx_param_size, Address(rbx_method, Method::const_offset())); 241 __ load_sized_value(rdx_param_size, 242 Address(rdx_param_size, ConstMethod::size_of_parameters_offset()), 243 sizeof(u2), /*is_signed*/ false); 244 // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), ""); 245 rdx_first_arg_addr = __ receiver_argument_address(Rparams, rdx_param_size, rdi_temp); 246 } else { 247 DEBUG_ONLY(rdx_param_size = noreg); 248 } 249 250 if (!is_signature_polymorphic_static(iid)) { 251 __ ldr(rcx_mh, rdx_first_arg_addr); 252 DEBUG_ONLY(rdx_param_size = noreg); 253 } 254 255 // rdx_first_arg_addr is live! 256 257 trace_method_handle_interpreter_entry(_masm, iid); 258 259 if (iid == vmIntrinsics::_invokeBasic) { 260 generate_method_handle_dispatch(_masm, iid, rcx_mh, noreg, not_for_compiler_entry); 261 262 } else { 263 // Adjust argument list by popping the trailing MemberName argument. 264 Register rcx_recv = noreg; 265 if (MethodHandles::ref_kind_has_receiver(ref_kind)) { 266 // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack. 267 __ ldr(rcx_recv = rcx_mh, rdx_first_arg_addr); 268 DEBUG_ONLY(rdx_param_size = noreg); 269 } 270 Register rbx_member = rbx_method; // MemberName ptr; incoming method ptr is dead now 271 #ifdef AARCH64 272 __ ldr(rbx_member, Address(Rparams, Interpreter::stackElementSize, post_indexed)); 273 #else 274 __ pop(rbx_member); 275 #endif 276 generate_method_handle_dispatch(_masm, iid, rcx_recv, rbx_member, not_for_compiler_entry); 277 } 278 return entry_point; 279 } 280 281 void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm, 282 vmIntrinsics::ID iid, 283 Register receiver_reg, 284 Register member_reg, 285 bool for_compiler_entry) { 286 assert(is_signature_polymorphic(iid), "expected invoke iid"); 287 // Use same name as x86 to ease future merges 288 Register rbx_method = Rmethod; // eventual target of this invocation 289 // temps used in this code are not used in *either* compiled or interpreted calling sequences 290 Register temp1 = (for_compiler_entry ? saved_last_sp_register() : R1_tmp); 291 Register temp2 = AARCH64_ONLY(R9) NOT_AARCH64(R8); 292 Register temp3 = Rtemp; // R12/R16 293 Register temp4 = AARCH64_ONLY(Rtemp2) NOT_AARCH64(R5); 294 if (for_compiler_entry) { 295 assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : j_rarg0), "only valid assignment"); 296 #ifdef AARCH64 297 assert_different_registers(temp1, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5, j_rarg6, j_rarg7); 298 assert_different_registers(temp2, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5, j_rarg6, j_rarg7); 299 assert_different_registers(temp3, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5, j_rarg6, j_rarg7); 300 assert_different_registers(temp4, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5, j_rarg6, j_rarg7); 301 #else 302 assert_different_registers(temp1, j_rarg0, j_rarg1, j_rarg2, j_rarg3); 303 assert_different_registers(temp2, j_rarg0, j_rarg1, j_rarg2, j_rarg3); 304 assert_different_registers(temp3, j_rarg0, j_rarg1, j_rarg2, j_rarg3); 305 assert_different_registers(temp4, j_rarg0, j_rarg1, j_rarg2, j_rarg3); 306 #endif // AARCH64 307 } 308 assert_different_registers(temp1, temp2, temp3, receiver_reg); 309 assert_different_registers(temp1, temp2, temp3, temp4, member_reg); 310 if (!for_compiler_entry) 311 assert_different_registers(temp1, temp2, temp3, temp4, saved_last_sp_register()); // don't trash lastSP 312 313 if (iid == vmIntrinsics::_invokeBasic) { 314 // indirect through MH.form.exactInvoker.vmtarget 315 jump_to_lambda_form(_masm, receiver_reg, temp3, for_compiler_entry); 316 317 } else { 318 // The method is a member invoker used by direct method handles. 319 if (VerifyMethodHandles) { 320 // make sure the trailing argument really is a MemberName (caller responsibility) 321 verify_klass(_masm, member_reg, temp2, temp3, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_invoke_MemberName), 322 "MemberName required for invokeVirtual etc."); 323 } 324 325 Address member_clazz( member_reg, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes())); 326 Address member_vmindex( member_reg, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes())); 327 Address member_vmtarget(member_reg, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes())); 328 Address vmtarget_method(Rmethod, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes())); 329 330 Register temp1_recv_klass = temp1; 331 if (iid != vmIntrinsics::_linkToStatic) { 332 if (iid == vmIntrinsics::_linkToSpecial) { 333 // Don't actually load the klass; just null-check the receiver. 334 __ null_check(receiver_reg, temp3); 335 } else { 336 // load receiver klass itself 337 __ null_check(receiver_reg, temp3, oopDesc::klass_offset_in_bytes()); 338 __ load_klass(temp1_recv_klass, receiver_reg); 339 __ verify_klass_ptr(temp1_recv_klass); 340 } 341 BLOCK_COMMENT("check_receiver {"); 342 // The receiver for the MemberName must be in receiver_reg. 343 // Check the receiver against the MemberName.clazz 344 if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) { 345 // Did not load it above... 346 __ load_klass(temp1_recv_klass, receiver_reg); 347 __ verify_klass_ptr(temp1_recv_klass); 348 } 349 // Check the receiver against the MemberName.clazz 350 if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) { 351 Label L_ok; 352 Register temp2_defc = temp2; 353 __ load_heap_oop(temp2_defc, member_clazz); 354 load_klass_from_Class(_masm, temp2_defc, temp3, temp4); 355 __ verify_klass_ptr(temp2_defc); 356 #ifdef AARCH64 357 // TODO-AARCH64 358 __ b(L_ok); 359 #else 360 __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, temp4, noreg, L_ok); 361 #endif 362 // If we get here, the type check failed! 363 __ stop("receiver class disagrees with MemberName.clazz"); 364 __ bind(L_ok); 365 } 366 BLOCK_COMMENT("} check_receiver"); 367 } 368 if (iid == vmIntrinsics::_linkToSpecial || 369 iid == vmIntrinsics::_linkToStatic) { 370 DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass 371 } 372 373 // Live registers at this point: 374 // member_reg - MemberName that was the extra argument 375 // temp1_recv_klass - klass of stacked receiver, if needed 376 377 Label L_incompatible_class_change_error; 378 switch (iid) { 379 case vmIntrinsics::_linkToSpecial: 380 if (VerifyMethodHandles) { 381 verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp3); 382 } 383 __ load_heap_oop(Rmethod, member_vmtarget); 384 __ access_load_at(T_ADDRESS, IN_HEAP, vmtarget_method, Rmethod, noreg, noreg, noreg); 385 break; 386 387 case vmIntrinsics::_linkToStatic: 388 if (VerifyMethodHandles) { 389 verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp3); 390 } 391 __ load_heap_oop(Rmethod, member_vmtarget); 392 __ access_load_at(T_ADDRESS, IN_HEAP, vmtarget_method, Rmethod, noreg, noreg, noreg); 393 break; 394 break; 395 396 case vmIntrinsics::_linkToVirtual: 397 { 398 // same as TemplateTable::invokevirtual, 399 // minus the CP setup and profiling: 400 401 if (VerifyMethodHandles) { 402 verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp3); 403 } 404 405 // pick out the vtable index from the MemberName, and then we can discard it: 406 Register temp2_index = temp2; 407 __ access_load_at(T_ADDRESS, IN_HEAP, member_vmindex, temp2_index, noreg, noreg, noreg); 408 409 if (VerifyMethodHandles) { 410 Label L_index_ok; 411 __ cmp(temp2_index, 0); 412 __ b(L_index_ok, ge); 413 __ stop("no virtual index"); 414 __ bind(L_index_ok); 415 } 416 417 // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget 418 // at this point. And VerifyMethodHandles has already checked clazz, if needed. 419 420 // get target Method* & entry point 421 __ lookup_virtual_method(temp1_recv_klass, temp2_index, Rmethod); 422 break; 423 } 424 425 case vmIntrinsics::_linkToInterface: 426 { 427 // same as TemplateTable::invokeinterface 428 // (minus the CP setup and profiling, with different argument motion) 429 if (VerifyMethodHandles) { 430 verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp3); 431 } 432 433 Register temp3_intf = temp3; 434 __ load_heap_oop(temp3_intf, member_clazz); 435 load_klass_from_Class(_masm, temp3_intf, temp2, temp4); 436 __ verify_klass_ptr(temp3_intf); 437 438 Register rbx_index = rbx_method; 439 __ access_load_at(T_ADDRESS, IN_HEAP, member_vmindex, rbx_index, noreg, noreg, noreg); 440 if (VerifyMethodHandles) { 441 Label L; 442 __ cmp(rbx_index, 0); 443 __ b(L, ge); 444 __ stop("invalid vtable index for MH.invokeInterface"); 445 __ bind(L); 446 } 447 448 // given intf, index, and recv klass, dispatch to the implementation method 449 Label L_no_such_interface; 450 __ lookup_interface_method(temp1_recv_klass, temp3_intf, 451 // note: next two args must be the same: 452 rbx_index, rbx_method, 453 temp2, temp4, 454 L_incompatible_class_change_error); 455 break; 456 } 457 458 default: 459 fatal("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid)); 460 break; 461 } 462 463 // Live at this point: 464 // Rmethod (target method) 465 // Rsender_sp, Rparams (if interpreted) 466 // register arguments (if compiled) 467 468 // After figuring out which concrete method to call, jump into it. 469 __ verify_method_ptr(Rmethod); 470 jump_from_method_handle(_masm, for_compiler_entry); 471 472 if (iid == vmIntrinsics::_linkToInterface) { 473 __ bind(L_incompatible_class_change_error); 474 __ jump(StubRoutines::throw_IncompatibleClassChangeError_entry(), relocInfo::runtime_call_type, Rtemp); 475 } 476 } 477 } 478 479 480 #ifndef PRODUCT 481 enum { 482 ARG_LIMIT = 255, SLOP = 4, 483 // use this parameter for checking for garbage stack movements: 484 UNREASONABLE_STACK_MOVE = (ARG_LIMIT + SLOP) 485 // the slop defends against false alarms due to fencepost errors 486 }; 487 488 #ifdef AARCH64 489 const int trace_mh_nregs = 32; // R0-R30, PC 490 #else 491 const int trace_mh_nregs = 15; 492 const Register trace_mh_regs[trace_mh_nregs] = 493 {R0, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, LR, PC}; 494 #endif // AARCH64 495 496 void trace_method_handle_stub(const char* adaptername, 497 intptr_t* saved_regs, 498 intptr_t* saved_bp, 499 oop mh) { 500 // called as a leaf from native code: do not block the JVM! 501 bool has_mh = (strstr(adaptername, "/static") == NULL && 502 strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH 503 intptr_t* entry_sp = (intptr_t*) &saved_regs[trace_mh_nregs]; // just after the saved regs 504 intptr_t* saved_sp = (intptr_t*) saved_regs[Rsender_sp->encoding()]; // save of Rsender_sp 505 intptr_t* last_sp = (intptr_t*) saved_bp[AARCH64_ONLY(frame::interpreter_frame_stack_top_offset) NOT_AARCH64(frame::interpreter_frame_last_sp_offset)]; 506 intptr_t* base_sp = last_sp; 507 508 intptr_t mh_reg = (intptr_t)saved_regs[R5_mh->encoding()]; 509 const char* mh_reg_name = "R5_mh"; 510 if (!has_mh) mh_reg_name = "R5"; 511 tty->print_cr("MH %s %s=" PTR_FORMAT " sp=(" PTR_FORMAT "+" INTX_FORMAT ") stack_size=" INTX_FORMAT " bp=" PTR_FORMAT, 512 adaptername, mh_reg_name, mh_reg, 513 (intptr_t)entry_sp, (intptr_t)saved_sp - (intptr_t)entry_sp, (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp); 514 515 if (last_sp != saved_sp && last_sp != NULL) 516 tty->print_cr("*** last_sp=" INTPTR_FORMAT, p2i(last_sp)); 517 if (Verbose) { 518 tty->print(" reg dump: "); 519 int i; 520 for (i = 0; i < trace_mh_nregs; i++) { 521 if (i > 0 && i % AARCH64_ONLY(2) NOT_AARCH64(4) == 0) 522 tty->print("\n + dump: "); 523 #ifdef AARCH64 524 const char* reg_name = (i == trace_mh_nregs-1) ? "pc" : as_Register(i)->name(); 525 #else 526 const char* reg_name = trace_mh_regs[i]->name(); 527 #endif 528 tty->print(" %s: " INTPTR_FORMAT, reg_name, p2i((void *)saved_regs[i])); 529 } 530 tty->cr(); 531 } 532 533 if (Verbose) { 534 // dump last frame (from JavaThread::print_frame_layout) 535 536 // Note: code is robust but the dumped informationm may not be 537 // 100% correct, particularly with respect to the dumped 538 // "unextended_sp". Getting it right for all trace_method_handle 539 // call paths is not worth the complexity/risk. The correct slot 540 // will be identified by *Rsender_sp anyway in the dump. 541 JavaThread* p = JavaThread::active(); 542 543 ResourceMark rm; 544 PRESERVE_EXCEPTION_MARK; 545 FrameValues values; 546 547 intptr_t* dump_fp = (intptr_t *) saved_bp; 548 address dump_pc = (address) saved_regs[trace_mh_nregs-2]; // LR (with LR,PC last in saved_regs) 549 frame dump_frame((intptr_t *)entry_sp, dump_fp, dump_pc); 550 551 dump_frame.describe(values, 1); 552 // mark Rsender_sp if seems valid 553 if (has_mh) { 554 if ((saved_sp >= entry_sp - UNREASONABLE_STACK_MOVE) && (saved_sp < dump_fp)) { 555 values.describe(-1, saved_sp, "*Rsender_sp"); 556 } 557 } 558 559 // Note: the unextended_sp may not be correct 560 tty->print_cr(" stack layout:"); 561 values.print(p); 562 } 563 if (Verbose) { 564 if (has_mh && oopDesc::is_oop(mh)) { 565 mh->print(); 566 if (java_lang_invoke_MethodHandle::is_instance(mh)) { 567 if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0) 568 java_lang_invoke_MethodHandle::form(mh)->print(); 569 } 570 } 571 } 572 } 573 574 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) { 575 if (!TraceMethodHandles) return; 576 BLOCK_COMMENT("trace_method_handle {"); 577 // register saving 578 // must correspond to trace_mh_nregs and trace_mh_regs defined above 579 int push_size = __ save_all_registers(); 580 assert(trace_mh_nregs*wordSize == push_size,"saved register count mismatch"); 581 582 __ mov_slow(R0, adaptername); 583 __ mov(R1, SP); // entry_sp (after pushes) 584 __ mov(R2, FP); 585 if (R5_mh != R3) { 586 assert_different_registers(R0, R1, R2, R5_mh); 587 __ mov(R3, R5_mh); 588 } 589 590 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), R0, R1, R2, R3); 591 592 __ restore_all_registers(); 593 BLOCK_COMMENT("} trace_method_handle"); 594 } 595 #endif //PRODUCT