1 /* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2015 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 "asm/macroAssembler.inline.hpp" 28 #include "classfile/javaClasses.inline.hpp" 29 #include "interpreter/interpreter.hpp" 30 #include "memory/allocation.inline.hpp" 31 #include "memory/resourceArea.hpp" 32 #include "prims/methodHandles.hpp" 33 34 #define __ _masm-> 35 36 #ifdef PRODUCT 37 #define BLOCK_COMMENT(str) // nothing 38 #else 39 #define BLOCK_COMMENT(str) __ block_comment(str) 40 #endif 41 42 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") 43 44 // Workaround for C++ overloading nastiness on '0' for RegisterOrConstant. 45 inline static RegisterOrConstant constant(int value) { 46 return RegisterOrConstant(value); 47 } 48 49 void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, 50 Register temp_reg, Register temp2_reg) { 51 if (VerifyMethodHandles) { 52 verify_klass(_masm, klass_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class), 53 temp_reg, temp2_reg, "MH argument is a Class"); 54 } 55 __ ld(klass_reg, java_lang_Class::klass_offset_in_bytes(), klass_reg); 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_reg, SystemDictionary::WKID klass_id, 71 Register temp_reg, Register temp2_reg, 72 const char* error_message) { 73 InstanceKlass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id); 74 KlassHandle klass = SystemDictionary::well_known_klass(klass_id); 75 Label L_ok, L_bad; 76 BLOCK_COMMENT("verify_klass {"); 77 __ verify_oop(obj_reg); 78 __ cmpdi(CCR0, obj_reg, 0); 79 __ beq(CCR0, L_bad); 80 __ load_klass(temp_reg, obj_reg); 81 __ load_const_optimized(temp2_reg, (address) klass_addr); 82 __ ld(temp2_reg, 0, temp2_reg); 83 __ cmpd(CCR0, temp_reg, temp2_reg); 84 __ beq(CCR0, L_ok); 85 __ ld(temp_reg, klass->super_check_offset(), temp_reg); 86 __ cmpd(CCR0, temp_reg, temp2_reg); 87 __ beq(CCR0, L_ok); 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 __ load_sized_value(temp, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes()), member_reg, 98 sizeof(u4), /*is_signed*/ false); 99 // assert(sizeof(u4) == sizeof(java.lang.invoke.MemberName.flags), ""); 100 __ srwi( temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT); 101 __ andi(temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK); 102 __ cmpwi(CCR1, temp, ref_kind); 103 __ beq(CCR1, L); 104 { char* buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal); 105 jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind); 106 if (ref_kind == JVM_REF_invokeVirtual || 107 ref_kind == JVM_REF_invokeSpecial) 108 // could do this for all ref_kinds, but would explode assembly code size 109 trace_method_handle(_masm, buf); 110 __ stop(buf); 111 } 112 BLOCK_COMMENT("} verify_ref_kind"); 113 __ BIND(L); 114 } 115 116 #endif // ASSERT 117 118 void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register target, Register temp, 119 bool for_compiler_entry) { 120 Label L_no_such_method; 121 assert(method == R19_method, "interpreter calling convention"); 122 assert_different_registers(method, target, temp); 123 124 if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) { 125 Label run_compiled_code; 126 // JVMTI events, such as single-stepping, are implemented partly by avoiding running 127 // compiled code in threads for which the event is enabled. Check here for 128 // interp_only_mode if these events CAN be enabled. 129 __ verify_thread(); 130 __ lwz(temp, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread); 131 __ cmplwi(CCR0, temp, 0); 132 __ beq(CCR0, run_compiled_code); 133 // Null method test is replicated below in compiled case, 134 // it might be able to address across the verify_thread() 135 __ cmplwi(CCR0, R19_method, 0); 136 __ beq(CCR0, L_no_such_method); 137 __ ld(target, in_bytes(Method::interpreter_entry_offset()), R19_method); 138 __ mtctr(target); 139 __ bctr(); 140 __ BIND(run_compiled_code); 141 } 142 143 // Compiled case, either static or fall-through from runtime conditional 144 __ cmplwi(CCR0, R19_method, 0); 145 __ beq(CCR0, L_no_such_method); 146 147 const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() : 148 Method::from_interpreted_offset(); 149 __ ld(target, in_bytes(entry_offset), R19_method); 150 __ mtctr(target); 151 __ bctr(); 152 153 __ bind(L_no_such_method); 154 assert(StubRoutines::throw_AbstractMethodError_entry() != NULL, "not yet generated!"); 155 __ load_const_optimized(target, StubRoutines::throw_AbstractMethodError_entry()); 156 __ mtctr(target); 157 __ bctr(); 158 } 159 160 161 void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm, 162 Register recv, Register method_temp, 163 Register temp2, Register temp3, 164 bool for_compiler_entry) { 165 BLOCK_COMMENT("jump_to_lambda_form {"); 166 // This is the initial entry point of a lazy method handle. 167 // After type checking, it picks up the invoker from the LambdaForm. 168 assert_different_registers(recv, method_temp, temp2); // temp3 is only passed on 169 assert(method_temp == R19_method, "required register for loading method"); 170 171 // Load the invoker, as MH -> MH.form -> LF.vmentry 172 __ verify_oop(recv); 173 __ load_heap_oop_not_null(method_temp, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()), recv, temp2); 174 __ verify_oop(method_temp); 175 __ load_heap_oop_not_null(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()), method_temp, temp2); 176 __ verify_oop(method_temp); 177 // The following assumes that a Method* is normally compressed in the vmtarget field: 178 __ ld(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), method_temp); 179 180 if (VerifyMethodHandles && !for_compiler_entry) { 181 // Make sure recv is already on stack. 182 __ ld(temp2, in_bytes(Method::const_offset()), method_temp); 183 __ load_sized_value(temp2, in_bytes(ConstMethod::size_of_parameters_offset()), temp2, 184 sizeof(u2), /*is_signed*/ false); 185 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), ""); 186 Label L; 187 __ ld(temp2, __ argument_offset(temp2, temp2, 0), R15_esp); 188 __ cmpd(CCR1, temp2, recv); 189 __ beq(CCR1, L); 190 __ stop("receiver not on stack"); 191 __ BIND(L); 192 } 193 194 jump_from_method_handle(_masm, method_temp, temp2, temp3, for_compiler_entry); 195 BLOCK_COMMENT("} jump_to_lambda_form"); 196 } 197 198 199 200 // Code generation 201 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm, 202 vmIntrinsics::ID iid) { 203 const bool not_for_compiler_entry = false; // this is the interpreter entry 204 assert(is_signature_polymorphic(iid), "expected invoke iid"); 205 if (iid == vmIntrinsics::_invokeGeneric || 206 iid == vmIntrinsics::_compiledLambdaForm) { 207 // Perhaps surprisingly, the symbolic references visible to Java are not directly used. 208 // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod. 209 // They all allow an appendix argument. 210 __ stop("Should not reach here"); // empty stubs make SG sick 211 return NULL; 212 } 213 214 Register argbase = R15_esp; // parameter (preserved) 215 Register argslot = R3; 216 Register temp1 = R6; 217 Register param_size = R7; 218 219 // here's where control starts out: 220 __ align(CodeEntryAlignment); 221 address entry_point = __ pc(); 222 223 if (VerifyMethodHandles) { 224 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2"); 225 226 Label L; 227 BLOCK_COMMENT("verify_intrinsic_id {"); 228 __ load_sized_value(temp1, Method::intrinsic_id_offset_in_bytes(), R19_method, 229 sizeof(u2), /*is_signed*/ false); 230 __ cmpwi(CCR1, temp1, (int) iid); 231 __ beq(CCR1, L); 232 if (iid == vmIntrinsics::_linkToVirtual || 233 iid == vmIntrinsics::_linkToSpecial) { 234 // could do this for all kinds, but would explode assembly code size 235 trace_method_handle(_masm, "bad Method*:intrinsic_id"); 236 } 237 __ stop("bad Method*::intrinsic_id"); 238 __ BIND(L); 239 BLOCK_COMMENT("} verify_intrinsic_id"); 240 } 241 242 // First task: Find out how big the argument list is. 243 int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid); 244 assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic"); 245 if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) { 246 __ ld(param_size, in_bytes(Method::const_offset()), R19_method); 247 __ load_sized_value(param_size, in_bytes(ConstMethod::size_of_parameters_offset()), param_size, 248 sizeof(u2), /*is_signed*/ false); 249 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), ""); 250 } else { 251 DEBUG_ONLY(param_size = noreg); 252 } 253 254 Register tmp_mh = noreg; 255 if (!is_signature_polymorphic_static(iid)) { 256 __ ld(tmp_mh = temp1, __ argument_offset(param_size, param_size, 0), argbase); 257 DEBUG_ONLY(param_size = noreg); 258 } 259 260 if (TraceMethodHandles) { 261 if (tmp_mh != noreg) { 262 __ mr(R23_method_handle, tmp_mh); // make stub happy 263 } 264 trace_method_handle_interpreter_entry(_masm, iid); 265 } 266 267 if (iid == vmIntrinsics::_invokeBasic) { 268 generate_method_handle_dispatch(_masm, iid, tmp_mh, noreg, not_for_compiler_entry); 269 270 } else { 271 // Adjust argument list by popping the trailing MemberName argument. 272 Register tmp_recv = noreg; 273 if (MethodHandles::ref_kind_has_receiver(ref_kind)) { 274 // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack. 275 __ ld(tmp_recv = temp1, __ argument_offset(param_size, param_size, 0), argbase); 276 DEBUG_ONLY(param_size = noreg); 277 } 278 Register R19_member = R19_method; // MemberName ptr; incoming method ptr is dead now 279 __ ld(R19_member, RegisterOrConstant((intptr_t)8), argbase); 280 __ add(argbase, Interpreter::stackElementSize, argbase); 281 generate_method_handle_dispatch(_masm, iid, tmp_recv, R19_member, not_for_compiler_entry); 282 } 283 284 return entry_point; 285 } 286 287 void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm, 288 vmIntrinsics::ID iid, 289 Register receiver_reg, 290 Register member_reg, 291 bool for_compiler_entry) { 292 assert(is_signature_polymorphic(iid), "expected invoke iid"); 293 Register temp1 = (for_compiler_entry ? R25_tmp5 : R7); 294 Register temp2 = (for_compiler_entry ? R22_tmp2 : R8); 295 Register temp3 = (for_compiler_entry ? R23_tmp3 : R9); 296 Register temp4 = (for_compiler_entry ? R24_tmp4 : R10); 297 if (receiver_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, receiver_reg); 298 if (member_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, member_reg); 299 300 if (iid == vmIntrinsics::_invokeBasic) { 301 // indirect through MH.form.vmentry.vmtarget 302 jump_to_lambda_form(_masm, receiver_reg, R19_method, temp1, temp2, for_compiler_entry); 303 } else { 304 // The method is a member invoker used by direct method handles. 305 if (VerifyMethodHandles) { 306 // make sure the trailing argument really is a MemberName (caller responsibility) 307 verify_klass(_masm, member_reg, SystemDictionary::WK_KLASS_ENUM_NAME(MemberName_klass), 308 temp1, temp2, 309 "MemberName required for invokeVirtual etc."); 310 } 311 312 Register temp1_recv_klass = temp1; 313 if (iid != vmIntrinsics::_linkToStatic) { 314 __ verify_oop(receiver_reg); 315 if (iid == vmIntrinsics::_linkToSpecial) { 316 // Don't actually load the klass; just null-check the receiver. 317 __ null_check_throw(receiver_reg, -1, temp1, 318 Interpreter::throw_NullPointerException_entry()); 319 } else { 320 // load receiver klass itself 321 __ null_check_throw(receiver_reg, oopDesc::klass_offset_in_bytes(), temp1, 322 Interpreter::throw_NullPointerException_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("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 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 = MacroAssembler::num_volatile_regs * 8; 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