1 /* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2012, 2014 SAP AG. 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 "asm/macroAssembler.inline.hpp" 28 #include "interpreter/interpreter.hpp" 29 #include "memory/allocation.inline.hpp" 30 #include "prims/methodHandles.hpp" 31 32 #define __ _masm-> 33 34 #ifdef CC_INTERP 35 #define EXCEPTION_ENTRY StubRoutines::throw_NullPointerException_at_call_entry() 36 #else 37 #define EXCEPTION_ENTRY Interpreter::throw_NullPointerException_entry() 38 #endif 39 40 #ifdef PRODUCT 41 #define BLOCK_COMMENT(str) // nothing 42 #else 43 #define BLOCK_COMMENT(str) __ block_comment(str) 44 #endif 45 46 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") 47 48 // Workaround for C++ overloading nastiness on '0' for RegisterOrConstant. 49 inline static RegisterOrConstant constant(int value) { 50 return RegisterOrConstant(value); 51 } 52 53 void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp_reg, Register temp2_reg) { 54 if (VerifyMethodHandles) 55 verify_klass(_masm, klass_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class), temp_reg, temp2_reg, 56 "MH argument is a Class"); 57 __ ld(klass_reg, java_lang_Class::klass_offset_in_bytes(), klass_reg); 58 } 59 60 #ifdef ASSERT 61 static int check_nonzero(const char* xname, int x) { 62 assert(x != 0, err_msg("%s should be nonzero", xname)); 63 return x; 64 } 65 #define NONZERO(x) check_nonzero(#x, x) 66 #else //ASSERT 67 #define NONZERO(x) (x) 68 #endif //ASSERT 69 70 #ifdef ASSERT 71 void MethodHandles::verify_klass(MacroAssembler* _masm, 72 Register obj_reg, SystemDictionary::WKID klass_id, 73 Register temp_reg, Register temp2_reg, 74 const char* error_message) { 75 Klass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id); 76 KlassHandle klass = SystemDictionary::well_known_klass(klass_id); 77 Label L_ok, L_bad; 78 BLOCK_COMMENT("verify_klass {"); 79 __ verify_oop(obj_reg); 80 __ cmpdi(CCR0, obj_reg, 0); 81 __ beq(CCR0, L_bad); 82 __ load_klass(temp_reg, obj_reg); 83 __ load_const_optimized(temp2_reg, (address) klass_addr); 84 __ ld(temp2_reg, 0, temp2_reg); 85 __ cmpd(CCR0, temp_reg, temp2_reg); 86 __ beq(CCR0, L_ok); 87 __ ld(temp_reg, klass->super_check_offset(), temp_reg); 88 __ cmpd(CCR0, temp_reg, temp2_reg); 89 __ beq(CCR0, L_ok); 90 __ BIND(L_bad); 91 __ stop(error_message); 92 __ BIND(L_ok); 93 BLOCK_COMMENT("} verify_klass"); 94 } 95 96 void MethodHandles::verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) { 97 Label L; 98 BLOCK_COMMENT("verify_ref_kind {"); 99 __ load_sized_value(temp, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes()), member_reg, 100 sizeof(u4), /*is_signed*/ false); 101 // assert(sizeof(u4) == sizeof(java.lang.invoke.MemberName.flags), ""); 102 __ srwi( temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT); 103 __ andi(temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK); 104 __ cmpwi(CCR1, temp, ref_kind); 105 __ beq(CCR1, L); 106 { char* buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal); 107 jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind); 108 if (ref_kind == JVM_REF_invokeVirtual || 109 ref_kind == JVM_REF_invokeSpecial) 110 // could do this for all ref_kinds, but would explode assembly code size 111 trace_method_handle(_masm, buf); 112 __ stop(buf); 113 } 114 BLOCK_COMMENT("} verify_ref_kind"); 115 __ BIND(L); 116 } 117 118 #endif // ASSERT 119 120 void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register target, Register temp, 121 bool for_compiler_entry) { 122 Label L_no_such_method; 123 assert(method == R19_method, "interpreter calling convention"); 124 assert_different_registers(method, target, temp); 125 126 if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) { 127 Label run_compiled_code; 128 // JVMTI events, such as single-stepping, are implemented partly by avoiding running 129 // compiled code in threads for which the event is enabled. Check here for 130 // interp_only_mode if these events CAN be enabled. 131 __ verify_thread(); 132 __ lwz(temp, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread); 133 __ cmplwi(CCR0, temp, 0); 134 __ beq(CCR0, run_compiled_code); 135 // Null method test is replicated below in compiled case, 136 // it might be able to address across the verify_thread() 137 __ cmplwi(CCR0, R19_method, 0); 138 __ beq(CCR0, L_no_such_method); 139 __ ld(target, in_bytes(Method::interpreter_entry_offset()), R19_method); 140 __ mtctr(target); 141 __ bctr(); 142 __ BIND(run_compiled_code); 143 } 144 145 // Compiled case, either static or fall-through from runtime conditional 146 __ cmplwi(CCR0, R19_method, 0); 147 __ beq(CCR0, L_no_such_method); 148 149 const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() : 150 Method::from_interpreted_offset(); 151 __ ld(target, in_bytes(entry_offset), R19_method); 152 __ mtctr(target); 153 __ bctr(); 154 155 __ bind(L_no_such_method); 156 assert(StubRoutines::throw_AbstractMethodError_entry() != NULL, "not yet generated!"); 157 __ load_const_optimized(target, StubRoutines::throw_AbstractMethodError_entry()); 158 __ mtctr(target); 159 __ bctr(); 160 } 161 162 163 void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm, 164 Register recv, Register method_temp, 165 Register temp2, Register temp3, 166 bool for_compiler_entry) { 167 BLOCK_COMMENT("jump_to_lambda_form {"); 168 // This is the initial entry point of a lazy method handle. 169 // After type checking, it picks up the invoker from the LambdaForm. 170 assert_different_registers(recv, method_temp, temp2); // temp3 is only passed on 171 assert(method_temp == R19_method, "required register for loading method"); 172 173 // Load the invoker, as MH -> MH.form -> LF.vmentry 174 __ verify_oop(recv); 175 __ load_heap_oop_not_null(method_temp, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()), recv, temp2); 176 __ verify_oop(method_temp); 177 __ load_heap_oop_not_null(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()), method_temp, temp2); 178 __ verify_oop(method_temp); 179 // The following assumes that a Method* is normally compressed in the vmtarget field: 180 __ ld(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), method_temp); 181 182 if (VerifyMethodHandles && !for_compiler_entry) { 183 // Make sure recv is already on stack. 184 __ ld(temp2, in_bytes(Method::const_offset()), method_temp); 185 __ load_sized_value(temp2, in_bytes(ConstMethod::size_of_parameters_offset()), temp2, 186 sizeof(u2), /*is_signed*/ false); 187 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), ""); 188 Label L; 189 __ ld(temp2, __ argument_offset(temp2, temp2, 0), CC_INTERP_ONLY(R17_tos) NOT_CC_INTERP(R15_esp)); 190 __ cmpd(CCR1, temp2, recv); 191 __ beq(CCR1, L); 192 __ stop("receiver not on stack"); 193 __ BIND(L); 194 } 195 196 jump_from_method_handle(_masm, method_temp, temp2, temp3, for_compiler_entry); 197 BLOCK_COMMENT("} jump_to_lambda_form"); 198 } 199 200 201 202 // Code generation 203 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm, 204 vmIntrinsics::ID iid) { 205 const bool not_for_compiler_entry = false; // this is the interpreter entry 206 assert(is_signature_polymorphic(iid), "expected invoke iid"); 207 if (iid == vmIntrinsics::_invokeGeneric || 208 iid == vmIntrinsics::_compiledLambdaForm) { 209 // Perhaps surprisingly, the symbolic references visible to Java are not directly used. 210 // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod. 211 // They all allow an appendix argument. 212 __ stop("Should not reach here"); // empty stubs make SG sick 213 return NULL; 214 } 215 216 Register argbase = CC_INTERP_ONLY(R17_tos) NOT_CC_INTERP(R15_esp); // parameter (preserved) 217 Register argslot = R3; 218 Register temp1 = R6; 219 Register param_size = R7; 220 221 // here's where control starts out: 222 __ align(CodeEntryAlignment); 223 address entry_point = __ pc(); 224 225 if (VerifyMethodHandles) { 226 Label L; 227 BLOCK_COMMENT("verify_intrinsic_id {"); 228 __ load_sized_value(temp1, Method::intrinsic_id_offset_in_bytes(), R19_method, 229 sizeof(u1), /*is_signed*/ false); 230 // assert(sizeof(u1) == sizeof(Method::_intrinsic_id), ""); 231 __ cmpwi(CCR1, temp1, (int) iid); 232 __ beq(CCR1, L); 233 if (iid == vmIntrinsics::_linkToVirtual || 234 iid == vmIntrinsics::_linkToSpecial) { 235 // could do this for all kinds, but would explode assembly code size 236 trace_method_handle(_masm, "bad Method*:intrinsic_id"); 237 } 238 __ stop("bad Method*::intrinsic_id"); 239 __ BIND(L); 240 BLOCK_COMMENT("} verify_intrinsic_id"); 241 } 242 243 // First task: Find out how big the argument list is. 244 int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid); 245 assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic"); 246 if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) { 247 __ ld(param_size, in_bytes(Method::const_offset()), R19_method); 248 __ load_sized_value(param_size, in_bytes(ConstMethod::size_of_parameters_offset()), param_size, 249 sizeof(u2), /*is_signed*/ false); 250 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), ""); 251 } else { 252 DEBUG_ONLY(param_size = noreg); 253 } 254 255 Register tmp_mh = noreg; 256 if (!is_signature_polymorphic_static(iid)) { 257 __ ld(tmp_mh = temp1, __ argument_offset(param_size, param_size, 0), argbase); 258 DEBUG_ONLY(param_size = noreg); 259 } 260 261 if (TraceMethodHandles) { 262 if (tmp_mh != noreg) { 263 __ mr(R23_method_handle, tmp_mh); // make stub happy 264 } 265 trace_method_handle_interpreter_entry(_masm, iid); 266 } 267 268 if (iid == vmIntrinsics::_invokeBasic) { 269 generate_method_handle_dispatch(_masm, iid, tmp_mh, noreg, not_for_compiler_entry); 270 271 } else { 272 // Adjust argument list by popping the trailing MemberName argument. 273 Register tmp_recv = noreg; 274 if (MethodHandles::ref_kind_has_receiver(ref_kind)) { 275 // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack. 276 __ ld(tmp_recv = temp1, __ argument_offset(param_size, param_size, 0), argbase); 277 DEBUG_ONLY(param_size = noreg); 278 } 279 Register R19_member = R19_method; // MemberName ptr; incoming method ptr is dead now 280 __ ld(R19_member, RegisterOrConstant((intptr_t)8), argbase); 281 __ add(argbase, Interpreter::stackElementSize, argbase); 282 generate_method_handle_dispatch(_masm, iid, tmp_recv, R19_member, not_for_compiler_entry); 283 } 284 285 return entry_point; 286 } 287 288 void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm, 289 vmIntrinsics::ID iid, 290 Register receiver_reg, 291 Register member_reg, 292 bool for_compiler_entry) { 293 assert(is_signature_polymorphic(iid), "expected invoke iid"); 294 Register temp1 = (for_compiler_entry ? R25_tmp5 : R7); 295 Register temp2 = (for_compiler_entry ? R22_tmp2 : R8); 296 Register temp3 = (for_compiler_entry ? R23_tmp3 : R9); 297 Register temp4 = (for_compiler_entry ? R24_tmp4 : R10); 298 if (receiver_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, receiver_reg); 299 if (member_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, member_reg); 300 301 if (iid == vmIntrinsics::_invokeBasic) { 302 // indirect through MH.form.vmentry.vmtarget 303 jump_to_lambda_form(_masm, receiver_reg, R19_method, temp1, temp2, for_compiler_entry); 304 } else { 305 // The method is a member invoker used by direct method handles. 306 if (VerifyMethodHandles) { 307 // make sure the trailing argument really is a MemberName (caller responsibility) 308 verify_klass(_masm, member_reg, SystemDictionary::WK_KLASS_ENUM_NAME(MemberName_klass), 309 temp1, temp2, 310 "MemberName required for invokeVirtual etc."); 311 } 312 313 Register temp1_recv_klass = temp1; 314 if (iid != vmIntrinsics::_linkToStatic) { 315 __ verify_oop(receiver_reg); 316 if (iid == vmIntrinsics::_linkToSpecial) { 317 // Don't actually load the klass; just null-check the receiver. 318 __ null_check_throw(receiver_reg, -1, temp1, EXCEPTION_ENTRY); 319 } else { 320 // load receiver klass itself 321 __ null_check_throw(receiver_reg, oopDesc::klass_offset_in_bytes(), temp1, EXCEPTION_ENTRY); 322 __ load_klass(temp1_recv_klass, receiver_reg); 323 __ verify_klass_ptr(temp1_recv_klass); 324 } 325 BLOCK_COMMENT("check_receiver {"); 326 // The receiver for the MemberName must be in receiver_reg. 327 // Check the receiver against the MemberName.clazz 328 if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) { 329 // Did not load it above... 330 __ load_klass(temp1_recv_klass, receiver_reg); 331 __ verify_klass_ptr(temp1_recv_klass); 332 } 333 if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) { 334 Label L_ok; 335 Register temp2_defc = temp2; 336 __ load_heap_oop_not_null(temp2_defc, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg, temp3); 337 load_klass_from_Class(_masm, temp2_defc, temp3, temp4); 338 __ verify_klass_ptr(temp2_defc); 339 __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, temp4, L_ok); 340 // If we get here, the type check failed! 341 __ stop("receiver class disagrees with MemberName.clazz"); 342 __ BIND(L_ok); 343 } 344 BLOCK_COMMENT("} check_receiver"); 345 } 346 if (iid == vmIntrinsics::_linkToSpecial || 347 iid == vmIntrinsics::_linkToStatic) { 348 DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass 349 } 350 351 // Live registers at this point: 352 // member_reg - MemberName that was the trailing argument 353 // temp1_recv_klass - klass of stacked receiver, if needed 354 // O5_savedSP - interpreter linkage (if interpreted) 355 // O0..O5 - compiler arguments (if compiled) 356 357 Label L_incompatible_class_change_error; 358 switch (iid) { 359 case vmIntrinsics::_linkToSpecial: 360 if (VerifyMethodHandles) { 361 verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp2); 362 } 363 __ ld(R19_method, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), member_reg); 364 break; 365 366 case vmIntrinsics::_linkToStatic: 367 if (VerifyMethodHandles) { 368 verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp2); 369 } 370 __ ld(R19_method, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), member_reg); 371 break; 372 373 case vmIntrinsics::_linkToVirtual: 374 { 375 // same as TemplateTable::invokevirtual, 376 // minus the CP setup and profiling: 377 378 if (VerifyMethodHandles) { 379 verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp2); 380 } 381 382 // pick out the vtable index from the MemberName, and then we can discard it: 383 Register temp2_index = temp2; 384 __ ld(temp2_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg); 385 386 if (VerifyMethodHandles) { 387 Label L_index_ok; 388 __ cmpdi(CCR1, temp2_index, 0); 389 __ bge(CCR1, L_index_ok); 390 __ stop("no virtual index"); 391 __ BIND(L_index_ok); 392 } 393 394 // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget 395 // at this point. And VerifyMethodHandles has already checked clazz, if needed. 396 397 // get target Method* & entry point 398 __ lookup_virtual_method(temp1_recv_klass, temp2_index, R19_method); 399 break; 400 } 401 402 case vmIntrinsics::_linkToInterface: 403 { 404 // same as TemplateTable::invokeinterface 405 // (minus the CP setup and profiling, with different argument motion) 406 if (VerifyMethodHandles) { 407 verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp2); 408 } 409 410 Register temp2_intf = temp2; 411 __ load_heap_oop_not_null(temp2_intf, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg, temp3); 412 load_klass_from_Class(_masm, temp2_intf, temp3, temp4); 413 __ verify_klass_ptr(temp2_intf); 414 415 Register vtable_index = R19_method; 416 __ ld(vtable_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg); 417 if (VerifyMethodHandles) { 418 Label L_index_ok; 419 __ cmpdi(CCR1, vtable_index, 0); 420 __ bge(CCR1, L_index_ok); 421 __ stop("invalid vtable index for MH.invokeInterface"); 422 __ BIND(L_index_ok); 423 } 424 425 // given intf, index, and recv klass, dispatch to the implementation method 426 __ lookup_interface_method(temp1_recv_klass, temp2_intf, 427 // note: next two args must be the same: 428 vtable_index, R19_method, 429 temp3, temp4, 430 L_incompatible_class_change_error); 431 break; 432 } 433 434 default: 435 fatal(err_msg_res("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid))); 436 break; 437 } 438 439 // Live at this point: 440 // R19_method 441 // O5_savedSP (if interpreted) 442 443 // After figuring out which concrete method to call, jump into it. 444 // Note that this works in the interpreter with no data motion. 445 // But the compiled version will require that rcx_recv be shifted out. 446 __ verify_method_ptr(R19_method); 447 jump_from_method_handle(_masm, R19_method, temp1, temp2, for_compiler_entry); 448 449 if (iid == vmIntrinsics::_linkToInterface) { 450 __ BIND(L_incompatible_class_change_error); 451 __ load_const_optimized(temp1, StubRoutines::throw_IncompatibleClassChangeError_entry()); 452 __ mtctr(temp1); 453 __ bctr(); 454 } 455 } 456 } 457 458 #ifndef PRODUCT 459 void trace_method_handle_stub(const char* adaptername, 460 oopDesc* mh, 461 intptr_t* entry_sp, 462 intptr_t* saved_regs) { 463 464 bool has_mh = (strstr(adaptername, "/static") == NULL && 465 strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH 466 const char* mh_reg_name = has_mh ? "R23_method_handle" : "G23"; 467 tty->print_cr("MH %s %s="INTPTR_FORMAT " sp=" INTPTR_FORMAT, 468 adaptername, mh_reg_name, (intptr_t) mh, entry_sp); 469 470 if (Verbose) { 471 tty->print_cr("Registers:"); 472 const int abi_offset = frame::abi_reg_args_size / 8; 473 for (int i = R3->encoding(); i <= R12->encoding(); i++) { 474 Register r = as_Register(i); 475 int count = i - R3->encoding(); 476 // The registers are stored in reverse order on the stack (by save_volatile_gprs(R1_SP, abi_reg_args_size)). 477 tty->print("%3s=" PTR_FORMAT, r->name(), saved_regs[abi_offset + count]); 478 if ((count + 1) % 4 == 0) { 479 tty->cr(); 480 } else { 481 tty->print(", "); 482 } 483 } 484 tty->cr(); 485 486 { 487 // dumping last frame with frame::describe 488 489 JavaThread* p = JavaThread::active(); 490 491 ResourceMark rm; 492 PRESERVE_EXCEPTION_MARK; // may not be needed by safer and unexpensive here 493 FrameValues values; 494 495 // Note: We want to allow trace_method_handle from any call site. 496 // While trace_method_handle creates a frame, it may be entered 497 // without a PC on the stack top (e.g. not just after a call). 498 // Walking that frame could lead to failures due to that invalid PC. 499 // => carefully detect that frame when doing the stack walking 500 501 // Current C frame 502 frame cur_frame = os::current_frame(); 503 504 // Robust search of trace_calling_frame (independant of inlining). 505 // Assumes saved_regs comes from a pusha in the trace_calling_frame. 506 assert(cur_frame.sp() < saved_regs, "registers not saved on stack ?"); 507 frame trace_calling_frame = os::get_sender_for_C_frame(&cur_frame); 508 while (trace_calling_frame.fp() < saved_regs) { 509 trace_calling_frame = os::get_sender_for_C_frame(&trace_calling_frame); 510 } 511 512 // Safely create a frame and call frame::describe. 513 intptr_t *dump_sp = trace_calling_frame.sender_sp(); 514 515 frame dump_frame = frame(dump_sp); 516 dump_frame.describe(values, 1); 517 518 values.describe(-1, saved_regs, "raw top of stack"); 519 520 tty->print_cr("Stack layout:"); 521 values.print(p); 522 } 523 524 if (has_mh && mh->is_oop()) { 525 mh->print(); 526 if (java_lang_invoke_MethodHandle::is_instance(mh)) { 527 if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0) 528 java_lang_invoke_MethodHandle::form(mh)->print(); 529 } 530 } 531 } 532 } 533 534 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) { 535 if (!TraceMethodHandles) return; 536 537 BLOCK_COMMENT("trace_method_handle {"); 538 539 const Register tmp = R11; // Will be preserved. 540 const int nbytes_save = 11*8; // volatile gprs except R0 541 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0 542 __ save_LR_CR(tmp); // save in old frame 543 544 __ mr(R5_ARG3, R1_SP); // saved_sp 545 __ push_frame_reg_args(nbytes_save, tmp); 546 547 __ load_const_optimized(R3_ARG1, (address)adaptername, tmp); 548 __ mr(R4_ARG2, R23_method_handle); 549 __ mr(R6_ARG4, R1_SP); 550 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub)); 551 552 __ pop_frame(); 553 __ restore_LR_CR(tmp); 554 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0 555 556 BLOCK_COMMENT("} trace_method_handle"); 557 } 558 #endif // PRODUCT