1 /* 2 * Copyright (c) 1997, 2015, 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 "classfile/javaClasses.inline.hpp" 29 #include "interpreter/interpreter.hpp" 30 #include "memory/allocation.inline.hpp" 31 #include "prims/methodHandles.hpp" 32 33 #define __ _masm-> 34 35 #ifdef CC_INTERP 36 #define EXCEPTION_ENTRY StubRoutines::throw_NullPointerException_at_call_entry() 37 #else 38 #define EXCEPTION_ENTRY Interpreter::throw_NullPointerException_entry() 39 #endif 40 41 #ifdef PRODUCT 42 #define BLOCK_COMMENT(str) // nothing 43 #else 44 #define BLOCK_COMMENT(str) __ block_comment(str) 45 #endif 46 47 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") 48 49 // Workaround for C++ overloading nastiness on '0' for RegisterOrConstant. 50 inline static RegisterOrConstant constant(int value) { 51 return RegisterOrConstant(value); 52 } 53 54 void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp_reg, Register temp2_reg) { 55 if (VerifyMethodHandles) 56 verify_klass(_masm, klass_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class), temp_reg, temp2_reg, 57 "MH argument is a Class"); 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, err_msg("%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 Klass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id); 77 KlassHandle 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 // The following assumes that a Method* is normally compressed in the vmtarget field: 181 __ ld(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), method_temp); 182 183 if (VerifyMethodHandles && !for_compiler_entry) { 184 // Make sure recv is already on stack. 185 __ ld(temp2, in_bytes(Method::const_offset()), method_temp); 186 __ load_sized_value(temp2, in_bytes(ConstMethod::size_of_parameters_offset()), temp2, 187 sizeof(u2), /*is_signed*/ false); 188 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), ""); 189 Label L; 190 __ ld(temp2, __ argument_offset(temp2, temp2, 0), CC_INTERP_ONLY(R17_tos) NOT_CC_INTERP(R15_esp)); 191 __ cmpd(CCR1, temp2, recv); 192 __ beq(CCR1, L); 193 __ stop("receiver not on stack"); 194 __ BIND(L); 195 } 196 197 jump_from_method_handle(_masm, method_temp, temp2, temp3, for_compiler_entry); 198 BLOCK_COMMENT("} jump_to_lambda_form"); 199 } 200 201 202 203 // Code generation 204 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm, 205 vmIntrinsics::ID iid) { 206 const bool not_for_compiler_entry = false; // this is the interpreter entry 207 assert(is_signature_polymorphic(iid), "expected invoke iid"); 208 if (iid == vmIntrinsics::_invokeGeneric || 209 iid == vmIntrinsics::_compiledLambdaForm) { 210 // Perhaps surprisingly, the symbolic references visible to Java are not directly used. 211 // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod. 212 // They all allow an appendix argument. 213 __ stop("Should not reach here"); // empty stubs make SG sick 214 return NULL; 215 } 216 217 Register argbase = CC_INTERP_ONLY(R17_tos) NOT_CC_INTERP(R15_esp); // parameter (preserved) 218 Register argslot = R3; 219 Register temp1 = R6; 220 Register param_size = R7; 221 222 // here's where control starts out: 223 __ align(CodeEntryAlignment); 224 address entry_point = __ pc(); 225 226 if (VerifyMethodHandles) { 227 Label L; 228 BLOCK_COMMENT("verify_intrinsic_id {"); 229 __ load_sized_value(temp1, Method::intrinsic_id_offset_in_bytes(), R19_method, 230 sizeof(u1), /*is_signed*/ false); 231 // assert(sizeof(u1) == sizeof(Method::_intrinsic_id), ""); 232 __ cmpwi(CCR1, temp1, (int) iid); 233 __ beq(CCR1, L); 234 if (iid == vmIntrinsics::_linkToVirtual || 235 iid == vmIntrinsics::_linkToSpecial) { 236 // could do this for all kinds, but would explode assembly code size 237 trace_method_handle(_masm, "bad Method*:intrinsic_id"); 238 } 239 __ stop("bad Method*::intrinsic_id"); 240 __ BIND(L); 241 BLOCK_COMMENT("} verify_intrinsic_id"); 242 } 243 244 // First task: Find out how big the argument list is. 245 int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid); 246 assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic"); 247 if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) { 248 __ ld(param_size, in_bytes(Method::const_offset()), R19_method); 249 __ load_sized_value(param_size, in_bytes(ConstMethod::size_of_parameters_offset()), param_size, 250 sizeof(u2), /*is_signed*/ false); 251 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), ""); 252 } else { 253 DEBUG_ONLY(param_size = noreg); 254 } 255 256 Register tmp_mh = noreg; 257 if (!is_signature_polymorphic_static(iid)) { 258 __ ld(tmp_mh = temp1, __ argument_offset(param_size, param_size, 0), argbase); 259 DEBUG_ONLY(param_size = noreg); 260 } 261 262 if (TraceMethodHandles) { 263 if (tmp_mh != noreg) { 264 __ mr(R23_method_handle, tmp_mh); // make stub happy 265 } 266 trace_method_handle_interpreter_entry(_masm, iid); 267 } 268 269 if (iid == vmIntrinsics::_invokeBasic) { 270 generate_method_handle_dispatch(_masm, iid, tmp_mh, noreg, not_for_compiler_entry); 271 272 } else { 273 // Adjust argument list by popping the trailing MemberName argument. 274 Register tmp_recv = noreg; 275 if (MethodHandles::ref_kind_has_receiver(ref_kind)) { 276 // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack. 277 __ ld(tmp_recv = temp1, __ argument_offset(param_size, param_size, 0), argbase); 278 DEBUG_ONLY(param_size = noreg); 279 } 280 Register R19_member = R19_method; // MemberName ptr; incoming method ptr is dead now 281 __ ld(R19_member, RegisterOrConstant((intptr_t)8), argbase); 282 __ add(argbase, Interpreter::stackElementSize, argbase); 283 generate_method_handle_dispatch(_masm, iid, tmp_recv, R19_member, not_for_compiler_entry); 284 } 285 286 return entry_point; 287 } 288 289 void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm, 290 vmIntrinsics::ID iid, 291 Register receiver_reg, 292 Register member_reg, 293 bool for_compiler_entry) { 294 assert(is_signature_polymorphic(iid), "expected invoke iid"); 295 Register temp1 = (for_compiler_entry ? R25_tmp5 : R7); 296 Register temp2 = (for_compiler_entry ? R22_tmp2 : R8); 297 Register temp3 = (for_compiler_entry ? R23_tmp3 : R9); 298 Register temp4 = (for_compiler_entry ? R24_tmp4 : R10); 299 if (receiver_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, receiver_reg); 300 if (member_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, member_reg); 301 302 if (iid == vmIntrinsics::_invokeBasic) { 303 // indirect through MH.form.vmentry.vmtarget 304 jump_to_lambda_form(_masm, receiver_reg, R19_method, temp1, temp2, for_compiler_entry); 305 } else { 306 // The method is a member invoker used by direct method handles. 307 if (VerifyMethodHandles) { 308 // make sure the trailing argument really is a MemberName (caller responsibility) 309 verify_klass(_masm, member_reg, SystemDictionary::WK_KLASS_ENUM_NAME(MemberName_klass), 310 temp1, temp2, 311 "MemberName required for invokeVirtual etc."); 312 } 313 314 Register temp1_recv_klass = temp1; 315 if (iid != vmIntrinsics::_linkToStatic) { 316 __ verify_oop(receiver_reg); 317 if (iid == vmIntrinsics::_linkToSpecial) { 318 // Don't actually load the klass; just null-check the receiver. 319 __ null_check_throw(receiver_reg, -1, temp1, EXCEPTION_ENTRY); 320 } else { 321 // load receiver klass itself 322 __ null_check_throw(receiver_reg, oopDesc::klass_offset_in_bytes(), temp1, EXCEPTION_ENTRY); 323 __ load_klass(temp1_recv_klass, receiver_reg); 324 __ verify_klass_ptr(temp1_recv_klass); 325 } 326 BLOCK_COMMENT("check_receiver {"); 327 // The receiver for the MemberName must be in receiver_reg. 328 // Check the receiver against the MemberName.clazz 329 if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) { 330 // Did not load it above... 331 __ load_klass(temp1_recv_klass, receiver_reg); 332 __ verify_klass_ptr(temp1_recv_klass); 333 } 334 if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) { 335 Label L_ok; 336 Register temp2_defc = temp2; 337 __ load_heap_oop_not_null(temp2_defc, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg, temp3); 338 load_klass_from_Class(_masm, temp2_defc, temp3, temp4); 339 __ verify_klass_ptr(temp2_defc); 340 __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, temp4, L_ok); 341 // If we get here, the type check failed! 342 __ stop("receiver class disagrees with MemberName.clazz"); 343 __ BIND(L_ok); 344 } 345 BLOCK_COMMENT("} check_receiver"); 346 } 347 if (iid == vmIntrinsics::_linkToSpecial || 348 iid == vmIntrinsics::_linkToStatic) { 349 DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass 350 } 351 352 // Live registers at this point: 353 // member_reg - MemberName that was the trailing argument 354 // temp1_recv_klass - klass of stacked receiver, if needed 355 // O5_savedSP - interpreter linkage (if interpreted) 356 // O0..O5 - compiler arguments (if compiled) 357 358 Label L_incompatible_class_change_error; 359 switch (iid) { 360 case vmIntrinsics::_linkToSpecial: 361 if (VerifyMethodHandles) { 362 verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp2); 363 } 364 __ ld(R19_method, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), member_reg); 365 break; 366 367 case vmIntrinsics::_linkToStatic: 368 if (VerifyMethodHandles) { 369 verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp2); 370 } 371 __ ld(R19_method, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), member_reg); 372 break; 373 374 case vmIntrinsics::_linkToVirtual: 375 { 376 // same as TemplateTable::invokevirtual, 377 // minus the CP setup and profiling: 378 379 if (VerifyMethodHandles) { 380 verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp2); 381 } 382 383 // pick out the vtable index from the MemberName, and then we can discard it: 384 Register temp2_index = temp2; 385 __ ld(temp2_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg); 386 387 if (VerifyMethodHandles) { 388 Label L_index_ok; 389 __ cmpdi(CCR1, temp2_index, 0); 390 __ bge(CCR1, L_index_ok); 391 __ stop("no virtual index"); 392 __ BIND(L_index_ok); 393 } 394 395 // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget 396 // at this point. And VerifyMethodHandles has already checked clazz, if needed. 397 398 // get target Method* & entry point 399 __ lookup_virtual_method(temp1_recv_klass, temp2_index, R19_method); 400 break; 401 } 402 403 case vmIntrinsics::_linkToInterface: 404 { 405 // same as TemplateTable::invokeinterface 406 // (minus the CP setup and profiling, with different argument motion) 407 if (VerifyMethodHandles) { 408 verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp2); 409 } 410 411 Register temp2_intf = temp2; 412 __ load_heap_oop_not_null(temp2_intf, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg, temp3); 413 load_klass_from_Class(_masm, temp2_intf, temp3, temp4); 414 __ verify_klass_ptr(temp2_intf); 415 416 Register vtable_index = R19_method; 417 __ ld(vtable_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg); 418 if (VerifyMethodHandles) { 419 Label L_index_ok; 420 __ cmpdi(CCR1, vtable_index, 0); 421 __ bge(CCR1, L_index_ok); 422 __ stop("invalid vtable index for MH.invokeInterface"); 423 __ BIND(L_index_ok); 424 } 425 426 // given intf, index, and recv klass, dispatch to the implementation method 427 __ lookup_interface_method(temp1_recv_klass, temp2_intf, 428 // note: next two args must be the same: 429 vtable_index, R19_method, 430 temp3, temp4, 431 L_incompatible_class_change_error); 432 break; 433 } 434 435 default: 436 fatal(err_msg_res("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid))); 437 break; 438 } 439 440 // Live at this point: 441 // R19_method 442 // O5_savedSP (if interpreted) 443 444 // After figuring out which concrete method to call, jump into it. 445 // Note that this works in the interpreter with no data motion. 446 // But the compiled version will require that rcx_recv be shifted out. 447 __ verify_method_ptr(R19_method); 448 jump_from_method_handle(_masm, R19_method, temp1, temp2, for_compiler_entry); 449 450 if (iid == vmIntrinsics::_linkToInterface) { 451 __ BIND(L_incompatible_class_change_error); 452 __ load_const_optimized(temp1, StubRoutines::throw_IncompatibleClassChangeError_entry()); 453 __ mtctr(temp1); 454 __ bctr(); 455 } 456 } 457 } 458 459 #ifndef PRODUCT 460 void trace_method_handle_stub(const char* adaptername, 461 oopDesc* mh, 462 intptr_t* entry_sp, 463 intptr_t* saved_regs) { 464 465 bool has_mh = (strstr(adaptername, "/static") == NULL && 466 strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH 467 const char* mh_reg_name = has_mh ? "R23_method_handle" : "G23"; 468 tty->print_cr("MH %s %s=" INTPTR_FORMAT " sp=" INTPTR_FORMAT, 469 adaptername, mh_reg_name, p2i(mh), p2i(entry_sp)); 470 471 if (Verbose) { 472 tty->print_cr("Registers:"); 473 const int abi_offset = frame::abi_reg_args_size / 8; 474 for (int i = R3->encoding(); i <= R12->encoding(); i++) { 475 Register r = as_Register(i); 476 int count = i - R3->encoding(); 477 // The registers are stored in reverse order on the stack (by save_volatile_gprs(R1_SP, abi_reg_args_size)). 478 tty->print("%3s=" PTR_FORMAT, r->name(), saved_regs[abi_offset + count]); 479 if ((count + 1) % 4 == 0) { 480 tty->cr(); 481 } else { 482 tty->print(", "); 483 } 484 } 485 tty->cr(); 486 487 { 488 // dumping last frame with frame::describe 489 490 JavaThread* p = JavaThread::active(); 491 492 ResourceMark rm; 493 PRESERVE_EXCEPTION_MARK; // may not be needed by safer and unexpensive here 494 FrameValues values; 495 496 // Note: We want to allow trace_method_handle from any call site. 497 // While trace_method_handle creates a frame, it may be entered 498 // without a PC on the stack top (e.g. not just after a call). 499 // Walking that frame could lead to failures due to that invalid PC. 500 // => carefully detect that frame when doing the stack walking 501 502 // Current C frame 503 frame cur_frame = os::current_frame(); 504 505 // Robust search of trace_calling_frame (independant of inlining). 506 // Assumes saved_regs comes from a pusha in the trace_calling_frame. 507 assert(cur_frame.sp() < saved_regs, "registers not saved on stack ?"); 508 frame trace_calling_frame = os::get_sender_for_C_frame(&cur_frame); 509 while (trace_calling_frame.fp() < saved_regs) { 510 trace_calling_frame = os::get_sender_for_C_frame(&trace_calling_frame); 511 } 512 513 // Safely create a frame and call frame::describe. 514 intptr_t *dump_sp = trace_calling_frame.sender_sp(); 515 516 frame dump_frame = frame(dump_sp); 517 dump_frame.describe(values, 1); 518 519 values.describe(-1, saved_regs, "raw top of stack"); 520 521 tty->print_cr("Stack layout:"); 522 values.print(p); 523 } 524 525 if (has_mh && mh->is_oop()) { 526 mh->print(); 527 if (java_lang_invoke_MethodHandle::is_instance(mh)) { 528 if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0) 529 java_lang_invoke_MethodHandle::form(mh)->print(); 530 } 531 } 532 } 533 } 534 535 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) { 536 if (!TraceMethodHandles) return; 537 538 BLOCK_COMMENT("trace_method_handle {"); 539 540 const Register tmp = R11; // Will be preserved. 541 const int nbytes_save = 11*8; // volatile gprs except R0 542 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0 543 __ save_LR_CR(tmp); // save in old frame 544 545 __ mr(R5_ARG3, R1_SP); // saved_sp 546 __ push_frame_reg_args(nbytes_save, tmp); 547 548 __ load_const_optimized(R3_ARG1, (address)adaptername, tmp); 549 __ mr(R4_ARG2, R23_method_handle); 550 __ mr(R6_ARG4, R1_SP); 551 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub)); 552 553 __ pop_frame(); 554 __ restore_LR_CR(tmp); 555 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0 556 557 BLOCK_COMMENT("} trace_method_handle"); 558 } 559 #endif // PRODUCT