1 /* 2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2017 SAP SE. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #include "precompiled.hpp" 27 #include "jvm.h" 28 #include "asm/macroAssembler.inline.hpp" 29 #include "classfile/javaClasses.inline.hpp" 30 #include "interpreter/interpreter.hpp" 31 #include "memory/allocation.inline.hpp" 32 #include "memory/resourceArea.hpp" 33 #include "prims/methodHandles.hpp" 34 #include "runtime/frame.inline.hpp" 35 #include "utilities/preserveException.hpp" 36 37 #define __ _masm-> 38 39 #ifdef PRODUCT 40 #define BLOCK_COMMENT(str) // nothing 41 #else 42 #define BLOCK_COMMENT(str) __ block_comment(str) 43 #endif 44 45 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") 46 47 // Workaround for C++ overloading nastiness on '0' for RegisterOrConstant. 48 inline static RegisterOrConstant constant(int value) { 49 return RegisterOrConstant(value); 50 } 51 52 void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, 53 Register temp_reg, Register temp2_reg) { 54 if (VerifyMethodHandles) { 55 verify_klass(_masm, klass_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class), 56 temp_reg, temp2_reg, "MH argument is a Class"); 57 } 58 __ ld(klass_reg, java_lang_Class::klass_offset_in_bytes(), klass_reg); 59 } 60 61 #ifdef ASSERT 62 static int check_nonzero(const char* xname, int x) { 63 assert(x != 0, "%s should be nonzero", xname); 64 return x; 65 } 66 #define NONZERO(x) check_nonzero(#x, x) 67 #else //ASSERT 68 #define NONZERO(x) (x) 69 #endif //ASSERT 70 71 #ifdef ASSERT 72 void MethodHandles::verify_klass(MacroAssembler* _masm, 73 Register obj_reg, SystemDictionary::WKID klass_id, 74 Register temp_reg, Register temp2_reg, 75 const char* error_message) { 76 InstanceKlass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id); 77 Klass* klass = SystemDictionary::well_known_klass(klass_id); 78 Label L_ok, L_bad; 79 BLOCK_COMMENT("verify_klass {"); 80 __ verify_oop(obj_reg); 81 __ cmpdi(CCR0, obj_reg, 0); 82 __ beq(CCR0, L_bad); 83 __ load_klass(temp_reg, obj_reg); 84 __ load_const_optimized(temp2_reg, (address) klass_addr); 85 __ ld(temp2_reg, 0, temp2_reg); 86 __ cmpd(CCR0, temp_reg, temp2_reg); 87 __ beq(CCR0, L_ok); 88 __ ld(temp_reg, klass->super_check_offset(), temp_reg); 89 __ cmpd(CCR0, temp_reg, temp2_reg); 90 __ beq(CCR0, L_ok); 91 __ BIND(L_bad); 92 __ stop(error_message); 93 __ BIND(L_ok); 94 BLOCK_COMMENT("} verify_klass"); 95 } 96 97 void MethodHandles::verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) { 98 Label L; 99 BLOCK_COMMENT("verify_ref_kind {"); 100 __ load_sized_value(temp, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes()), member_reg, 101 sizeof(u4), /*is_signed*/ false); 102 // assert(sizeof(u4) == sizeof(java.lang.invoke.MemberName.flags), ""); 103 __ srwi( temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT); 104 __ andi(temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK); 105 __ cmpwi(CCR1, temp, ref_kind); 106 __ beq(CCR1, L); 107 { char* buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal); 108 jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind); 109 if (ref_kind == JVM_REF_invokeVirtual || 110 ref_kind == JVM_REF_invokeSpecial) 111 // could do this for all ref_kinds, but would explode assembly code size 112 trace_method_handle(_masm, buf); 113 __ stop(buf); 114 } 115 BLOCK_COMMENT("} verify_ref_kind"); 116 __ BIND(L); 117 } 118 119 #endif // ASSERT 120 121 void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register target, Register temp, 122 bool for_compiler_entry) { 123 Label L_no_such_method; 124 assert(method == R19_method, "interpreter calling convention"); 125 assert_different_registers(method, target, temp); 126 127 if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) { 128 Label run_compiled_code; 129 // JVMTI events, such as single-stepping, are implemented partly by avoiding running 130 // compiled code in threads for which the event is enabled. Check here for 131 // interp_only_mode if these events CAN be enabled. 132 __ verify_thread(); 133 __ lwz(temp, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread); 134 __ cmplwi(CCR0, temp, 0); 135 __ beq(CCR0, run_compiled_code); 136 // Null method test is replicated below in compiled case, 137 // it might be able to address across the verify_thread() 138 __ cmplwi(CCR0, R19_method, 0); 139 __ beq(CCR0, L_no_such_method); 140 __ ld(target, in_bytes(Method::interpreter_entry_offset()), R19_method); 141 __ mtctr(target); 142 __ bctr(); 143 __ BIND(run_compiled_code); 144 } 145 146 // Compiled case, either static or fall-through from runtime conditional 147 __ cmplwi(CCR0, R19_method, 0); 148 __ beq(CCR0, L_no_such_method); 149 150 const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() : 151 Method::from_interpreted_offset(); 152 __ ld(target, in_bytes(entry_offset), R19_method); 153 __ mtctr(target); 154 __ bctr(); 155 156 __ bind(L_no_such_method); 157 assert(StubRoutines::throw_AbstractMethodError_entry() != NULL, "not yet generated!"); 158 __ load_const_optimized(target, StubRoutines::throw_AbstractMethodError_entry()); 159 __ mtctr(target); 160 __ bctr(); 161 } 162 163 164 void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm, 165 Register recv, Register method_temp, 166 Register temp2, Register temp3, 167 bool for_compiler_entry) { 168 BLOCK_COMMENT("jump_to_lambda_form {"); 169 // This is the initial entry point of a lazy method handle. 170 // After type checking, it picks up the invoker from the LambdaForm. 171 assert_different_registers(recv, method_temp, temp2); // temp3 is only passed on 172 assert(method_temp == R19_method, "required register for loading method"); 173 174 // Load the invoker, as MH -> MH.form -> LF.vmentry 175 __ verify_oop(recv); 176 __ load_heap_oop_not_null(method_temp, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()), recv, temp2); 177 __ verify_oop(method_temp); 178 __ load_heap_oop_not_null(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()), method_temp, temp2); 179 __ verify_oop(method_temp); 180 __ load_heap_oop_not_null(method_temp, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()), method_temp); 181 __ verify_oop(method_temp); 182 __ ld(method_temp, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes()), method_temp); 183 184 if (VerifyMethodHandles && !for_compiler_entry) { 185 // Make sure recv is already on stack. 186 __ ld(temp2, in_bytes(Method::const_offset()), method_temp); 187 __ load_sized_value(temp2, in_bytes(ConstMethod::size_of_parameters_offset()), temp2, 188 sizeof(u2), /*is_signed*/ false); 189 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), ""); 190 Label L; 191 __ ld(temp2, __ argument_offset(temp2, temp2, 0), R15_esp); 192 __ cmpd(CCR1, temp2, recv); 193 __ beq(CCR1, L); 194 __ stop("receiver not on stack"); 195 __ BIND(L); 196 } 197 198 jump_from_method_handle(_masm, method_temp, temp2, temp3, for_compiler_entry); 199 BLOCK_COMMENT("} jump_to_lambda_form"); 200 } 201 202 203 204 // Code generation 205 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm, 206 vmIntrinsics::ID iid) { 207 const bool not_for_compiler_entry = false; // this is the interpreter entry 208 assert(is_signature_polymorphic(iid), "expected invoke iid"); 209 if (iid == vmIntrinsics::_invokeGeneric || 210 iid == vmIntrinsics::_compiledLambdaForm) { 211 // Perhaps surprisingly, the symbolic references visible to Java are not directly used. 212 // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod. 213 // They all allow an appendix argument. 214 __ stop("Should not reach here"); // empty stubs make SG sick 215 return NULL; 216 } 217 218 Register argbase = R15_esp; // parameter (preserved) 219 Register argslot = R3; 220 Register temp1 = R6; 221 Register param_size = R7; 222 223 // here's where control starts out: 224 __ align(CodeEntryAlignment); 225 address entry_point = __ pc(); 226 227 if (VerifyMethodHandles) { 228 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2"); 229 230 Label L; 231 BLOCK_COMMENT("verify_intrinsic_id {"); 232 __ load_sized_value(temp1, Method::intrinsic_id_offset_in_bytes(), R19_method, 233 sizeof(u2), /*is_signed*/ false); 234 __ cmpwi(CCR1, temp1, (int) iid); 235 __ beq(CCR1, L); 236 if (iid == vmIntrinsics::_linkToVirtual || 237 iid == vmIntrinsics::_linkToSpecial) { 238 // could do this for all kinds, but would explode assembly code size 239 trace_method_handle(_masm, "bad Method*:intrinsic_id"); 240 } 241 __ stop("bad Method*::intrinsic_id"); 242 __ BIND(L); 243 BLOCK_COMMENT("} verify_intrinsic_id"); 244 } 245 246 // First task: Find out how big the argument list is. 247 int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid); 248 assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic"); 249 if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) { 250 __ ld(param_size, in_bytes(Method::const_offset()), R19_method); 251 __ load_sized_value(param_size, in_bytes(ConstMethod::size_of_parameters_offset()), param_size, 252 sizeof(u2), /*is_signed*/ false); 253 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), ""); 254 } else { 255 DEBUG_ONLY(param_size = noreg); 256 } 257 258 Register tmp_mh = noreg; 259 if (!is_signature_polymorphic_static(iid)) { 260 __ ld(tmp_mh = temp1, __ argument_offset(param_size, param_size, 0), argbase); 261 DEBUG_ONLY(param_size = noreg); 262 } 263 264 if (TraceMethodHandles) { 265 if (tmp_mh != noreg) { 266 __ mr(R23_method_handle, tmp_mh); // make stub happy 267 } 268 trace_method_handle_interpreter_entry(_masm, iid); 269 } 270 271 if (iid == vmIntrinsics::_invokeBasic) { 272 generate_method_handle_dispatch(_masm, iid, tmp_mh, noreg, not_for_compiler_entry); 273 274 } else { 275 // Adjust argument list by popping the trailing MemberName argument. 276 Register tmp_recv = noreg; 277 if (MethodHandles::ref_kind_has_receiver(ref_kind)) { 278 // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack. 279 __ ld(tmp_recv = temp1, __ argument_offset(param_size, param_size, 0), argbase); 280 DEBUG_ONLY(param_size = noreg); 281 } 282 Register R19_member = R19_method; // MemberName ptr; incoming method ptr is dead now 283 __ ld(R19_member, RegisterOrConstant((intptr_t)8), argbase); 284 __ add(argbase, Interpreter::stackElementSize, argbase); 285 generate_method_handle_dispatch(_masm, iid, tmp_recv, R19_member, not_for_compiler_entry); 286 } 287 288 return entry_point; 289 } 290 291 void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm, 292 vmIntrinsics::ID iid, 293 Register receiver_reg, 294 Register member_reg, 295 bool for_compiler_entry) { 296 assert(is_signature_polymorphic(iid), "expected invoke iid"); 297 Register temp1 = (for_compiler_entry ? R25_tmp5 : R7); 298 Register temp2 = (for_compiler_entry ? R22_tmp2 : R8); 299 Register temp3 = (for_compiler_entry ? R23_tmp3 : R9); 300 Register temp4 = (for_compiler_entry ? R24_tmp4 : R10); 301 if (receiver_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, receiver_reg); 302 if (member_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, member_reg); 303 304 if (iid == vmIntrinsics::_invokeBasic) { 305 // indirect through MH.form.vmentry.vmtarget 306 jump_to_lambda_form(_masm, receiver_reg, R19_method, temp1, temp2, for_compiler_entry); 307 } else { 308 // The method is a member invoker used by direct method handles. 309 if (VerifyMethodHandles) { 310 // make sure the trailing argument really is a MemberName (caller responsibility) 311 verify_klass(_masm, member_reg, SystemDictionary::WK_KLASS_ENUM_NAME(MemberName_klass), 312 temp1, temp2, 313 "MemberName required for invokeVirtual etc."); 314 } 315 316 Register temp1_recv_klass = temp1; 317 if (iid != vmIntrinsics::_linkToStatic) { 318 __ verify_oop(receiver_reg); 319 if (iid == vmIntrinsics::_linkToSpecial) { 320 // Don't actually load the klass; just null-check the receiver. 321 __ null_check_throw(receiver_reg, -1, temp1, 322 Interpreter::throw_NullPointerException_entry()); 323 } else { 324 // load receiver klass itself 325 __ null_check_throw(receiver_reg, oopDesc::klass_offset_in_bytes(), temp1, 326 Interpreter::throw_NullPointerException_entry()); 327 __ load_klass(temp1_recv_klass, receiver_reg); 328 __ verify_klass_ptr(temp1_recv_klass); 329 } 330 BLOCK_COMMENT("check_receiver {"); 331 // The receiver for the MemberName must be in receiver_reg. 332 // Check the receiver against the MemberName.clazz 333 if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) { 334 // Did not load it above... 335 __ load_klass(temp1_recv_klass, receiver_reg); 336 __ verify_klass_ptr(temp1_recv_klass); 337 } 338 if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) { 339 Label L_ok; 340 Register temp2_defc = temp2; 341 __ load_heap_oop_not_null(temp2_defc, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg, temp3); 342 load_klass_from_Class(_masm, temp2_defc, temp3, temp4); 343 __ verify_klass_ptr(temp2_defc); 344 __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, temp4, L_ok); 345 // If we get here, the type check failed! 346 __ stop("receiver class disagrees with MemberName.clazz"); 347 __ BIND(L_ok); 348 } 349 BLOCK_COMMENT("} check_receiver"); 350 } 351 if (iid == vmIntrinsics::_linkToSpecial || 352 iid == vmIntrinsics::_linkToStatic) { 353 DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass 354 } 355 356 // Live registers at this point: 357 // member_reg - MemberName that was the trailing argument 358 // temp1_recv_klass - klass of stacked receiver, if needed 359 // O5_savedSP - interpreter linkage (if interpreted) 360 // O0..O5 - compiler arguments (if compiled) 361 362 Label L_incompatible_class_change_error; 363 switch (iid) { 364 case vmIntrinsics::_linkToSpecial: 365 if (VerifyMethodHandles) { 366 verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp2); 367 } 368 __ load_heap_oop(R19_method, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()), member_reg); 369 __ ld(R19_method, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes()), R19_method); 370 break; 371 372 case vmIntrinsics::_linkToStatic: 373 if (VerifyMethodHandles) { 374 verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp2); 375 } 376 __ load_heap_oop(R19_method, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()), member_reg); 377 __ ld(R19_method, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes()), R19_method); 378 break; 379 380 case vmIntrinsics::_linkToVirtual: 381 { 382 // same as TemplateTable::invokevirtual, 383 // minus the CP setup and profiling: 384 385 if (VerifyMethodHandles) { 386 verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp2); 387 } 388 389 // pick out the vtable index from the MemberName, and then we can discard it: 390 Register temp2_index = temp2; 391 __ ld(temp2_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg); 392 393 if (VerifyMethodHandles) { 394 Label L_index_ok; 395 __ cmpdi(CCR1, temp2_index, 0); 396 __ bge(CCR1, L_index_ok); 397 __ stop("no virtual index"); 398 __ BIND(L_index_ok); 399 } 400 401 // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget 402 // at this point. And VerifyMethodHandles has already checked clazz, if needed. 403 404 // get target Method* & entry point 405 __ lookup_virtual_method(temp1_recv_klass, temp2_index, R19_method); 406 break; 407 } 408 409 case vmIntrinsics::_linkToInterface: 410 { 411 // same as TemplateTable::invokeinterface 412 // (minus the CP setup and profiling, with different argument motion) 413 if (VerifyMethodHandles) { 414 verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp2); 415 } 416 417 Register temp2_intf = temp2; 418 __ load_heap_oop_not_null(temp2_intf, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg, temp3); 419 load_klass_from_Class(_masm, temp2_intf, temp3, temp4); 420 __ verify_klass_ptr(temp2_intf); 421 422 Register vtable_index = R19_method; 423 __ ld(vtable_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg); 424 if (VerifyMethodHandles) { 425 Label L_index_ok; 426 __ cmpdi(CCR1, vtable_index, 0); 427 __ bge(CCR1, L_index_ok); 428 __ stop("invalid vtable index for MH.invokeInterface"); 429 __ BIND(L_index_ok); 430 } 431 432 // given intf, index, and recv klass, dispatch to the implementation method 433 __ lookup_interface_method(temp1_recv_klass, temp2_intf, 434 // note: next two args must be the same: 435 vtable_index, R19_method, 436 temp3, temp4, 437 L_incompatible_class_change_error); 438 break; 439 } 440 441 default: 442 fatal("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid)); 443 break; 444 } 445 446 // Live at this point: 447 // R19_method 448 // O5_savedSP (if interpreted) 449 450 // After figuring out which concrete method to call, jump into it. 451 // Note that this works in the interpreter with no data motion. 452 // But the compiled version will require that rcx_recv be shifted out. 453 __ verify_method_ptr(R19_method); 454 jump_from_method_handle(_masm, R19_method, temp1, temp2, for_compiler_entry); 455 456 if (iid == vmIntrinsics::_linkToInterface) { 457 __ BIND(L_incompatible_class_change_error); 458 __ load_const_optimized(temp1, StubRoutines::throw_IncompatibleClassChangeError_entry()); 459 __ mtctr(temp1); 460 __ bctr(); 461 } 462 } 463 } 464 465 #ifndef PRODUCT 466 void trace_method_handle_stub(const char* adaptername, 467 oopDesc* mh, 468 intptr_t* entry_sp, 469 intptr_t* saved_regs) { 470 471 bool has_mh = (strstr(adaptername, "/static") == NULL && 472 strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH 473 const char* mh_reg_name = has_mh ? "R23_method_handle" : "G23"; 474 tty->print_cr("MH %s %s=" INTPTR_FORMAT " sp=" INTPTR_FORMAT, 475 adaptername, mh_reg_name, p2i(mh), p2i(entry_sp)); 476 477 if (Verbose) { 478 tty->print_cr("Registers:"); 479 const int abi_offset = frame::abi_reg_args_size / 8; 480 for (int i = R3->encoding(); i <= R12->encoding(); i++) { 481 Register r = as_Register(i); 482 int count = i - R3->encoding(); 483 // The registers are stored in reverse order on the stack (by save_volatile_gprs(R1_SP, abi_reg_args_size)). 484 tty->print("%3s=" PTR_FORMAT, r->name(), saved_regs[abi_offset + count]); 485 if ((count + 1) % 4 == 0) { 486 tty->cr(); 487 } else { 488 tty->print(", "); 489 } 490 } 491 tty->cr(); 492 493 { 494 // dumping last frame with frame::describe 495 496 JavaThread* p = JavaThread::active(); 497 498 ResourceMark rm; 499 PRESERVE_EXCEPTION_MARK; // may not be needed by safer and unexpensive here 500 FrameValues values; 501 502 // Note: We want to allow trace_method_handle from any call site. 503 // While trace_method_handle creates a frame, it may be entered 504 // without a PC on the stack top (e.g. not just after a call). 505 // Walking that frame could lead to failures due to that invalid PC. 506 // => carefully detect that frame when doing the stack walking 507 508 // Current C frame 509 frame cur_frame = os::current_frame(); 510 511 // Robust search of trace_calling_frame (independant of inlining). 512 assert(cur_frame.sp() <= saved_regs, "registers not saved on stack ?"); 513 frame trace_calling_frame = os::get_sender_for_C_frame(&cur_frame); 514 while (trace_calling_frame.fp() < saved_regs) { 515 trace_calling_frame = os::get_sender_for_C_frame(&trace_calling_frame); 516 } 517 518 // Safely create a frame and call frame::describe. 519 intptr_t *dump_sp = trace_calling_frame.sender_sp(); 520 521 frame dump_frame = frame(dump_sp); 522 dump_frame.describe(values, 1); 523 524 values.describe(-1, saved_regs, "raw top of stack"); 525 526 tty->print_cr("Stack layout:"); 527 values.print(p); 528 } 529 530 if (has_mh && oopDesc::is_oop(mh)) { 531 mh->print(); 532 if (java_lang_invoke_MethodHandle::is_instance(mh)) { 533 if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0) 534 java_lang_invoke_MethodHandle::form(mh)->print(); 535 } 536 } 537 } 538 } 539 540 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) { 541 if (!TraceMethodHandles) return; 542 543 BLOCK_COMMENT("trace_method_handle {"); 544 545 const Register tmp = R11; // Will be preserved. 546 const int nbytes_save = MacroAssembler::num_volatile_regs * 8; 547 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0 548 __ save_LR_CR(tmp); // save in old frame 549 550 __ mr(R5_ARG3, R1_SP); // saved_sp 551 __ push_frame_reg_args(nbytes_save, tmp); 552 553 __ load_const_optimized(R3_ARG1, (address)adaptername, tmp); 554 __ mr(R4_ARG2, R23_method_handle); 555 __ mr(R6_ARG4, R1_SP); 556 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub)); 557 558 __ pop_frame(); 559 __ restore_LR_CR(tmp); 560 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0 561 562 BLOCK_COMMENT("} trace_method_handle"); 563 } 564 #endif // PRODUCT