1 /* 2 * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2014, Red Hat Inc. 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.hpp" 28 #include "interpreter/bytecodeHistogram.hpp" 29 #include "interpreter/interpreter.hpp" 30 #include "interpreter/interpreterRuntime.hpp" 31 #include "interpreter/interp_masm.hpp" 32 #include "interpreter/templateInterpreterGenerator.hpp" 33 #include "interpreter/templateTable.hpp" 34 #include "interpreter/bytecodeTracer.hpp" 35 #include "memory/resourceArea.hpp" 36 #include "oops/arrayOop.hpp" 37 #include "oops/methodData.hpp" 38 #include "oops/method.hpp" 39 #include "oops/oop.inline.hpp" 40 #include "prims/jvmtiExport.hpp" 41 #include "prims/jvmtiThreadState.hpp" 42 #include "runtime/arguments.hpp" 43 #include "runtime/deoptimization.hpp" 44 #include "runtime/frame.inline.hpp" 45 #include "runtime/sharedRuntime.hpp" 46 #include "runtime/stubRoutines.hpp" 47 #include "runtime/synchronizer.hpp" 48 #include "runtime/timer.hpp" 49 #include "runtime/vframeArray.hpp" 50 #include "utilities/debug.hpp" 51 #include <sys/types.h> 52 53 #ifndef PRODUCT 54 #include "oops/method.hpp" 55 #endif // !PRODUCT 56 57 #ifdef BUILTIN_SIM 58 #include "../../../../../../simulator/simulator.hpp" 59 #endif 60 61 // Size of interpreter code. Increase if too small. Interpreter will 62 // fail with a guarantee ("not enough space for interpreter generation"); 63 // if too small. 64 // Run with +PrintInterpreter to get the VM to print out the size. 65 // Max size with JVMTI 66 int TemplateInterpreter::InterpreterCodeSize = 200 * 1024; 67 68 #define __ _masm-> 69 70 //----------------------------------------------------------------------------- 71 72 extern "C" void entry(CodeBuffer*); 73 74 //----------------------------------------------------------------------------- 75 76 address TemplateInterpreterGenerator::generate_slow_signature_handler() { 77 address entry = __ pc(); 78 79 __ andr(esp, esp, -16); 80 __ mov(c_rarg3, esp); 81 // rmethod 82 // rlocals 83 // c_rarg3: first stack arg - wordSize 84 85 // adjust sp 86 __ sub(sp, c_rarg3, 18 * wordSize); 87 __ str(lr, Address(__ pre(sp, -2 * wordSize))); 88 __ call_VM(noreg, 89 CAST_FROM_FN_PTR(address, 90 InterpreterRuntime::slow_signature_handler), 91 rmethod, rlocals, c_rarg3); 92 93 // r0: result handler 94 95 // Stack layout: 96 // rsp: return address <- sp 97 // 1 garbage 98 // 8 integer args (if static first is unused) 99 // 1 float/double identifiers 100 // 8 double args 101 // stack args <- esp 102 // garbage 103 // expression stack bottom 104 // bcp (NULL) 105 // ... 106 107 // Restore LR 108 __ ldr(lr, Address(__ post(sp, 2 * wordSize))); 109 110 // Do FP first so we can use c_rarg3 as temp 111 __ ldrw(c_rarg3, Address(sp, 9 * wordSize)); // float/double identifiers 112 113 for (int i = 0; i < Argument::n_float_register_parameters_c; i++) { 114 const FloatRegister r = as_FloatRegister(i); 115 116 Label d, done; 117 118 __ tbnz(c_rarg3, i, d); 119 __ ldrs(r, Address(sp, (10 + i) * wordSize)); 120 __ b(done); 121 __ bind(d); 122 __ ldrd(r, Address(sp, (10 + i) * wordSize)); 123 __ bind(done); 124 } 125 126 // c_rarg0 contains the result from the call of 127 // InterpreterRuntime::slow_signature_handler so we don't touch it 128 // here. It will be loaded with the JNIEnv* later. 129 __ ldr(c_rarg1, Address(sp, 1 * wordSize)); 130 for (int i = c_rarg2->encoding(); i <= c_rarg7->encoding(); i += 2) { 131 Register rm = as_Register(i), rn = as_Register(i+1); 132 __ ldp(rm, rn, Address(sp, i * wordSize)); 133 } 134 135 __ add(sp, sp, 18 * wordSize); 136 __ ret(lr); 137 138 return entry; 139 } 140 141 142 // 143 // Various method entries 144 // 145 146 address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) { 147 // rmethod: Method* 148 // r13: sender sp 149 // esp: args 150 151 if (!InlineIntrinsics) return NULL; // Generate a vanilla entry 152 153 // These don't need a safepoint check because they aren't virtually 154 // callable. We won't enter these intrinsics from compiled code. 155 // If in the future we added an intrinsic which was virtually callable 156 // we'd have to worry about how to safepoint so that this code is used. 157 158 // mathematical functions inlined by compiler 159 // (interpreter must provide identical implementation 160 // in order to avoid monotonicity bugs when switching 161 // from interpreter to compiler in the middle of some 162 // computation) 163 // 164 // stack: 165 // [ arg ] <-- esp 166 // [ arg ] 167 // retaddr in lr 168 169 address entry_point = NULL; 170 Register continuation = lr; 171 switch (kind) { 172 case Interpreter::java_lang_math_abs: 173 entry_point = __ pc(); 174 __ ldrd(v0, Address(esp)); 175 __ fabsd(v0, v0); 176 __ mov(sp, r13); // Restore caller's SP 177 break; 178 case Interpreter::java_lang_math_sqrt: 179 entry_point = __ pc(); 180 __ ldrd(v0, Address(esp)); 181 __ fsqrtd(v0, v0); 182 __ mov(sp, r13); 183 break; 184 case Interpreter::java_lang_math_sin : 185 case Interpreter::java_lang_math_cos : 186 case Interpreter::java_lang_math_tan : 187 case Interpreter::java_lang_math_log : 188 case Interpreter::java_lang_math_log10 : 189 case Interpreter::java_lang_math_exp : 190 entry_point = __ pc(); 191 __ ldrd(v0, Address(esp)); 192 __ mov(sp, r13); 193 __ mov(r19, lr); 194 continuation = r19; // The first callee-saved register 195 generate_transcendental_entry(kind, 1); 196 break; 197 case Interpreter::java_lang_math_pow : 198 entry_point = __ pc(); 199 __ mov(r19, lr); 200 continuation = r19; 201 __ ldrd(v0, Address(esp, 2 * Interpreter::stackElementSize)); 202 __ ldrd(v1, Address(esp)); 203 __ mov(sp, r13); 204 generate_transcendental_entry(kind, 2); 205 break; 206 case Interpreter::java_lang_math_fmaD : 207 if (UseFMA) { 208 entry_point = __ pc(); 209 __ ldrd(v0, Address(esp, 4 * Interpreter::stackElementSize)); 210 __ ldrd(v1, Address(esp, 2 * Interpreter::stackElementSize)); 211 __ ldrd(v2, Address(esp)); 212 __ fmaddd(v0, v0, v1, v2); 213 __ mov(sp, r13); // Restore caller's SP 214 } 215 break; 216 case Interpreter::java_lang_math_fmaF : 217 if (UseFMA) { 218 entry_point = __ pc(); 219 __ ldrs(v0, Address(esp, 2 * Interpreter::stackElementSize)); 220 __ ldrs(v1, Address(esp, Interpreter::stackElementSize)); 221 __ ldrs(v2, Address(esp)); 222 __ fmadds(v0, v0, v1, v2); 223 __ mov(sp, r13); // Restore caller's SP 224 } 225 break; 226 default: 227 ; 228 } 229 if (entry_point) { 230 __ br(continuation); 231 } 232 233 return entry_point; 234 } 235 236 // double trigonometrics and transcendentals 237 // static jdouble dsin(jdouble x); 238 // static jdouble dcos(jdouble x); 239 // static jdouble dtan(jdouble x); 240 // static jdouble dlog(jdouble x); 241 // static jdouble dlog10(jdouble x); 242 // static jdouble dexp(jdouble x); 243 // static jdouble dpow(jdouble x, jdouble y); 244 245 void TemplateInterpreterGenerator::generate_transcendental_entry(AbstractInterpreter::MethodKind kind, int fpargs) { 246 address fn; 247 switch (kind) { 248 case Interpreter::java_lang_math_sin : 249 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dsin); 250 break; 251 case Interpreter::java_lang_math_cos : 252 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dcos); 253 break; 254 case Interpreter::java_lang_math_tan : 255 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dtan); 256 break; 257 case Interpreter::java_lang_math_log : 258 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dlog); 259 break; 260 case Interpreter::java_lang_math_log10 : 261 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10); 262 break; 263 case Interpreter::java_lang_math_exp : 264 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dexp); 265 break; 266 case Interpreter::java_lang_math_pow : 267 fpargs = 2; 268 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dpow); 269 break; 270 default: 271 ShouldNotReachHere(); 272 fn = NULL; // unreachable 273 } 274 const int gpargs = 0, rtype = 3; 275 __ mov(rscratch1, fn); 276 __ blrt(rscratch1, gpargs, fpargs, rtype); 277 } 278 279 // Abstract method entry 280 // Attempt to execute abstract method. Throw exception 281 address TemplateInterpreterGenerator::generate_abstract_entry(void) { 282 // rmethod: Method* 283 // r13: sender SP 284 285 address entry_point = __ pc(); 286 287 // abstract method entry 288 289 // pop return address, reset last_sp to NULL 290 __ empty_expression_stack(); 291 __ restore_bcp(); // bcp must be correct for exception handler (was destroyed) 292 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 293 294 // throw exception 295 __ call_VM(noreg, CAST_FROM_FN_PTR(address, 296 InterpreterRuntime::throw_AbstractMethodError)); 297 // the call_VM checks for exception, so we should never return here. 298 __ should_not_reach_here(); 299 300 return entry_point; 301 } 302 303 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { 304 address entry = __ pc(); 305 306 #ifdef ASSERT 307 { 308 Label L; 309 __ ldr(rscratch1, Address(rfp, 310 frame::interpreter_frame_monitor_block_top_offset * 311 wordSize)); 312 __ mov(rscratch2, sp); 313 __ cmp(rscratch1, rscratch2); // maximal rsp for current rfp (stack 314 // grows negative) 315 __ br(Assembler::HS, L); // check if frame is complete 316 __ stop ("interpreter frame not set up"); 317 __ bind(L); 318 } 319 #endif // ASSERT 320 // Restore bcp under the assumption that the current frame is still 321 // interpreted 322 __ restore_bcp(); 323 324 // expression stack must be empty before entering the VM if an 325 // exception happened 326 __ empty_expression_stack(); 327 // throw exception 328 __ call_VM(noreg, 329 CAST_FROM_FN_PTR(address, 330 InterpreterRuntime::throw_StackOverflowError)); 331 return entry; 332 } 333 334 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler( 335 const char* name) { 336 address entry = __ pc(); 337 // expression stack must be empty before entering the VM if an 338 // exception happened 339 __ empty_expression_stack(); 340 // setup parameters 341 // ??? convention: expect aberrant index in register r1 342 __ movw(c_rarg2, r1); 343 __ mov(c_rarg1, (address)name); 344 __ call_VM(noreg, 345 CAST_FROM_FN_PTR(address, 346 InterpreterRuntime:: 347 throw_ArrayIndexOutOfBoundsException), 348 c_rarg1, c_rarg2); 349 return entry; 350 } 351 352 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { 353 address entry = __ pc(); 354 355 // object is at TOS 356 __ pop(c_rarg1); 357 358 // expression stack must be empty before entering the VM if an 359 // exception happened 360 __ empty_expression_stack(); 361 362 __ call_VM(noreg, 363 CAST_FROM_FN_PTR(address, 364 InterpreterRuntime:: 365 throw_ClassCastException), 366 c_rarg1); 367 return entry; 368 } 369 370 address TemplateInterpreterGenerator::generate_exception_handler_common( 371 const char* name, const char* message, bool pass_oop) { 372 assert(!pass_oop || message == NULL, "either oop or message but not both"); 373 address entry = __ pc(); 374 if (pass_oop) { 375 // object is at TOS 376 __ pop(c_rarg2); 377 } 378 // expression stack must be empty before entering the VM if an 379 // exception happened 380 __ empty_expression_stack(); 381 // setup parameters 382 __ lea(c_rarg1, Address((address)name)); 383 if (pass_oop) { 384 __ call_VM(r0, CAST_FROM_FN_PTR(address, 385 InterpreterRuntime:: 386 create_klass_exception), 387 c_rarg1, c_rarg2); 388 } else { 389 // kind of lame ExternalAddress can't take NULL because 390 // external_word_Relocation will assert. 391 if (message != NULL) { 392 __ lea(c_rarg2, Address((address)message)); 393 } else { 394 __ mov(c_rarg2, NULL_WORD); 395 } 396 __ call_VM(r0, 397 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), 398 c_rarg1, c_rarg2); 399 } 400 // throw exception 401 __ b(address(Interpreter::throw_exception_entry())); 402 return entry; 403 } 404 405 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) { 406 address entry = __ pc(); 407 408 // Restore stack bottom in case i2c adjusted stack 409 __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); 410 // and NULL it as marker that esp is now tos until next java call 411 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); 412 __ restore_bcp(); 413 __ restore_locals(); 414 __ restore_constant_pool_cache(); 415 __ get_method(rmethod); 416 417 // Pop N words from the stack 418 __ get_cache_and_index_at_bcp(r1, r2, 1, index_size); 419 __ ldr(r1, Address(r1, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset())); 420 __ andr(r1, r1, ConstantPoolCacheEntry::parameter_size_mask); 421 422 __ add(esp, esp, r1, Assembler::LSL, 3); 423 424 // Restore machine SP 425 __ ldr(rscratch1, Address(rmethod, Method::const_offset())); 426 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset())); 427 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2); 428 __ ldr(rscratch2, 429 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize)); 430 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtw, 3); 431 __ andr(sp, rscratch1, -16); 432 433 #ifndef PRODUCT 434 // tell the simulator that the method has been reentered 435 if (NotifySimulator) { 436 __ notify(Assembler::method_reentry); 437 } 438 #endif 439 440 __ check_and_handle_popframe(rthread); 441 __ check_and_handle_earlyret(rthread); 442 443 __ get_dispatch(); 444 __ dispatch_next(state, step); 445 446 return entry; 447 } 448 449 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, 450 int step) { 451 address entry = __ pc(); 452 __ restore_bcp(); 453 __ restore_locals(); 454 __ restore_constant_pool_cache(); 455 __ get_method(rmethod); 456 __ get_dispatch(); 457 458 // Calculate stack limit 459 __ ldr(rscratch1, Address(rmethod, Method::const_offset())); 460 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset())); 461 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2); 462 __ ldr(rscratch2, 463 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize)); 464 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtx, 3); 465 __ andr(sp, rscratch1, -16); 466 467 // Restore expression stack pointer 468 __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); 469 // NULL last_sp until next java call 470 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); 471 472 #if INCLUDE_JVMCI 473 // Check if we need to take lock at entry of synchronized method. This can 474 // only occur on method entry so emit it only for vtos with step 0. 475 if (UseJVMCICompiler && state == vtos && step == 0) { 476 Label L; 477 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); 478 __ cbz(rscratch1, L); 479 // Clear flag. 480 __ strb(zr, Address(rthread, JavaThread::pending_monitorenter_offset())); 481 // Take lock. 482 lock_method(); 483 __ bind(L); 484 } else { 485 #ifdef ASSERT 486 if (UseJVMCICompiler) { 487 Label L; 488 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); 489 __ cbz(rscratch1, L); 490 __ stop("unexpected pending monitor in deopt entry"); 491 __ bind(L); 492 } 493 #endif 494 } 495 #endif 496 // handle exceptions 497 { 498 Label L; 499 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); 500 __ cbz(rscratch1, L); 501 __ call_VM(noreg, 502 CAST_FROM_FN_PTR(address, 503 InterpreterRuntime::throw_pending_exception)); 504 __ should_not_reach_here(); 505 __ bind(L); 506 } 507 508 __ dispatch_next(state, step); 509 return entry; 510 } 511 512 address TemplateInterpreterGenerator::generate_result_handler_for( 513 BasicType type) { 514 address entry = __ pc(); 515 switch (type) { 516 case T_BOOLEAN: __ uxtb(r0, r0); break; 517 case T_CHAR : __ uxth(r0, r0); break; 518 case T_BYTE : __ sxtb(r0, r0); break; 519 case T_SHORT : __ sxth(r0, r0); break; 520 case T_INT : __ uxtw(r0, r0); break; // FIXME: We almost certainly don't need this 521 case T_LONG : /* nothing to do */ break; 522 case T_VOID : /* nothing to do */ break; 523 case T_FLOAT : /* nothing to do */ break; 524 case T_DOUBLE : /* nothing to do */ break; 525 case T_OBJECT : 526 // retrieve result from frame 527 __ ldr(r0, Address(rfp, frame::interpreter_frame_oop_temp_offset*wordSize)); 528 // and verify it 529 __ verify_oop(r0); 530 break; 531 default : ShouldNotReachHere(); 532 } 533 __ ret(lr); // return from result handler 534 return entry; 535 } 536 537 address TemplateInterpreterGenerator::generate_safept_entry_for( 538 TosState state, 539 address runtime_entry) { 540 address entry = __ pc(); 541 __ push(state); 542 __ call_VM(noreg, runtime_entry); 543 __ membar(Assembler::AnyAny); 544 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos)); 545 return entry; 546 } 547 548 // Helpers for commoning out cases in the various type of method entries. 549 // 550 551 552 // increment invocation count & check for overflow 553 // 554 // Note: checking for negative value instead of overflow 555 // so we have a 'sticky' overflow test 556 // 557 // rmethod: method 558 // 559 void TemplateInterpreterGenerator::generate_counter_incr( 560 Label* overflow, 561 Label* profile_method, 562 Label* profile_method_continue) { 563 Label done; 564 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not. 565 if (TieredCompilation) { 566 int increment = InvocationCounter::count_increment; 567 Label no_mdo; 568 if (ProfileInterpreter) { 569 // Are we profiling? 570 __ ldr(r0, Address(rmethod, Method::method_data_offset())); 571 __ cbz(r0, no_mdo); 572 // Increment counter in the MDO 573 const Address mdo_invocation_counter(r0, in_bytes(MethodData::invocation_counter_offset()) + 574 in_bytes(InvocationCounter::counter_offset())); 575 const Address mask(r0, in_bytes(MethodData::invoke_mask_offset())); 576 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rscratch1, rscratch2, false, Assembler::EQ, overflow); 577 __ b(done); 578 } 579 __ bind(no_mdo); 580 // Increment counter in MethodCounters 581 const Address invocation_counter(rscratch2, 582 MethodCounters::invocation_counter_offset() + 583 InvocationCounter::counter_offset()); 584 __ get_method_counters(rmethod, rscratch2, done); 585 const Address mask(rscratch2, in_bytes(MethodCounters::invoke_mask_offset())); 586 __ increment_mask_and_jump(invocation_counter, increment, mask, rscratch1, r1, false, Assembler::EQ, overflow); 587 __ bind(done); 588 } else { // not TieredCompilation 589 const Address backedge_counter(rscratch2, 590 MethodCounters::backedge_counter_offset() + 591 InvocationCounter::counter_offset()); 592 const Address invocation_counter(rscratch2, 593 MethodCounters::invocation_counter_offset() + 594 InvocationCounter::counter_offset()); 595 596 __ get_method_counters(rmethod, rscratch2, done); 597 598 if (ProfileInterpreter) { // %%% Merge this into MethodData* 599 __ ldrw(r1, Address(rscratch2, MethodCounters::interpreter_invocation_counter_offset())); 600 __ addw(r1, r1, 1); 601 __ strw(r1, Address(rscratch2, MethodCounters::interpreter_invocation_counter_offset())); 602 } 603 // Update standard invocation counters 604 __ ldrw(r1, invocation_counter); 605 __ ldrw(r0, backedge_counter); 606 607 __ addw(r1, r1, InvocationCounter::count_increment); 608 __ andw(r0, r0, InvocationCounter::count_mask_value); 609 610 __ strw(r1, invocation_counter); 611 __ addw(r0, r0, r1); // add both counters 612 613 // profile_method is non-null only for interpreted method so 614 // profile_method != NULL == !native_call 615 616 if (ProfileInterpreter && profile_method != NULL) { 617 // Test to see if we should create a method data oop 618 __ ldr(rscratch2, Address(rmethod, Method::method_counters_offset())); 619 __ ldrw(rscratch2, Address(rscratch2, in_bytes(MethodCounters::interpreter_profile_limit_offset()))); 620 __ cmpw(r0, rscratch2); 621 __ br(Assembler::LT, *profile_method_continue); 622 623 // if no method data exists, go to profile_method 624 __ test_method_data_pointer(rscratch2, *profile_method); 625 } 626 627 { 628 __ ldr(rscratch2, Address(rmethod, Method::method_counters_offset())); 629 __ ldrw(rscratch2, Address(rscratch2, in_bytes(MethodCounters::interpreter_invocation_limit_offset()))); 630 __ cmpw(r0, rscratch2); 631 __ br(Assembler::HS, *overflow); 632 } 633 __ bind(done); 634 } 635 } 636 637 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) { 638 639 // Asm interpreter on entry 640 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ] 641 // Everything as it was on entry 642 643 // InterpreterRuntime::frequency_counter_overflow takes two 644 // arguments, the first (thread) is passed by call_VM, the second 645 // indicates if the counter overflow occurs at a backwards branch 646 // (NULL bcp). We pass zero for it. The call returns the address 647 // of the verified entry point for the method or NULL if the 648 // compilation did not complete (either went background or bailed 649 // out). 650 __ mov(c_rarg1, 0); 651 __ call_VM(noreg, 652 CAST_FROM_FN_PTR(address, 653 InterpreterRuntime::frequency_counter_overflow), 654 c_rarg1); 655 656 __ b(do_continue); 657 } 658 659 // See if we've got enough room on the stack for locals plus overhead 660 // below JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError 661 // without going through the signal handler, i.e., reserved and yellow zones 662 // will not be made usable. The shadow zone must suffice to handle the 663 // overflow. 664 // The expression stack grows down incrementally, so the normal guard 665 // page mechanism will work for that. 666 // 667 // NOTE: Since the additional locals are also always pushed (wasn't 668 // obvious in generate_method_entry) so the guard should work for them 669 // too. 670 // 671 // Args: 672 // r3: number of additional locals this frame needs (what we must check) 673 // rmethod: Method* 674 // 675 // Kills: 676 // r0 677 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) { 678 679 // monitor entry size: see picture of stack set 680 // (generate_method_entry) and frame_amd64.hpp 681 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 682 683 // total overhead size: entry_size + (saved rbp through expr stack 684 // bottom). be sure to change this if you add/subtract anything 685 // to/from the overhead area 686 const int overhead_size = 687 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size; 688 689 const int page_size = os::vm_page_size(); 690 691 Label after_frame_check; 692 693 // see if the frame is greater than one page in size. If so, 694 // then we need to verify there is enough stack space remaining 695 // for the additional locals. 696 // 697 // Note that we use SUBS rather than CMP here because the immediate 698 // field of this instruction may overflow. SUBS can cope with this 699 // because it is a macro that will expand to some number of MOV 700 // instructions and a register operation. 701 __ subs(rscratch1, r3, (page_size - overhead_size) / Interpreter::stackElementSize); 702 __ br(Assembler::LS, after_frame_check); 703 704 // compute rsp as if this were going to be the last frame on 705 // the stack before the red zone 706 707 // locals + overhead, in bytes 708 __ mov(r0, overhead_size); 709 __ add(r0, r0, r3, Assembler::LSL, Interpreter::logStackElementSize); // 2 slots per parameter. 710 711 const Address stack_limit(rthread, JavaThread::stack_overflow_limit_offset()); 712 __ ldr(rscratch1, stack_limit); 713 714 #ifdef ASSERT 715 Label limit_okay; 716 // Verify that thread stack limit is non-zero. 717 __ cbnz(rscratch1, limit_okay); 718 __ stop("stack overflow limit is zero"); 719 __ bind(limit_okay); 720 #endif 721 722 // Add stack limit to locals. 723 __ add(r0, r0, rscratch1); 724 725 // Check against the current stack bottom. 726 __ cmp(sp, r0); 727 __ br(Assembler::HI, after_frame_check); 728 729 // Remove the incoming args, peeling the machine SP back to where it 730 // was in the caller. This is not strictly necessary, but unless we 731 // do so the stack frame may have a garbage FP; this ensures a 732 // correct call stack that we can always unwind. The ANDR should be 733 // unnecessary because the sender SP in r13 is always aligned, but 734 // it doesn't hurt. 735 __ andr(sp, r13, -16); 736 737 // Note: the restored frame is not necessarily interpreted. 738 // Use the shared runtime version of the StackOverflowError. 739 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated"); 740 __ far_jump(RuntimeAddress(StubRoutines::throw_StackOverflowError_entry())); 741 742 // all done with frame size check 743 __ bind(after_frame_check); 744 } 745 746 // Allocate monitor and lock method (asm interpreter) 747 // 748 // Args: 749 // rmethod: Method* 750 // rlocals: locals 751 // 752 // Kills: 753 // r0 754 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs) 755 // rscratch1, rscratch2 (scratch regs) 756 void TemplateInterpreterGenerator::lock_method() { 757 // synchronize method 758 const Address access_flags(rmethod, Method::access_flags_offset()); 759 const Address monitor_block_top( 760 rfp, 761 frame::interpreter_frame_monitor_block_top_offset * wordSize); 762 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 763 764 #ifdef ASSERT 765 { 766 Label L; 767 __ ldrw(r0, access_flags); 768 __ tst(r0, JVM_ACC_SYNCHRONIZED); 769 __ br(Assembler::NE, L); 770 __ stop("method doesn't need synchronization"); 771 __ bind(L); 772 } 773 #endif // ASSERT 774 775 // get synchronization object 776 { 777 Label done; 778 __ ldrw(r0, access_flags); 779 __ tst(r0, JVM_ACC_STATIC); 780 // get receiver (assume this is frequent case) 781 __ ldr(r0, Address(rlocals, Interpreter::local_offset_in_bytes(0))); 782 __ br(Assembler::EQ, done); 783 __ load_mirror(r0, rmethod); 784 785 #ifdef ASSERT 786 { 787 Label L; 788 __ cbnz(r0, L); 789 __ stop("synchronization object is NULL"); 790 __ bind(L); 791 } 792 #endif // ASSERT 793 794 __ bind(done); 795 } 796 797 // add space for monitor & lock 798 __ sub(sp, sp, entry_size); // add space for a monitor entry 799 __ sub(esp, esp, entry_size); 800 __ mov(rscratch1, esp); 801 __ str(rscratch1, monitor_block_top); // set new monitor block top 802 // store object 803 __ str(r0, Address(esp, BasicObjectLock::obj_offset_in_bytes())); 804 __ mov(c_rarg1, esp); // object address 805 __ lock_object(c_rarg1); 806 } 807 808 // Generate a fixed interpreter frame. This is identical setup for 809 // interpreted methods and for native methods hence the shared code. 810 // 811 // Args: 812 // lr: return address 813 // rmethod: Method* 814 // rlocals: pointer to locals 815 // rcpool: cp cache 816 // stack_pointer: previous sp 817 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { 818 // initialize fixed part of activation frame 819 if (native_call) { 820 __ sub(esp, sp, 14 * wordSize); 821 __ mov(rbcp, zr); 822 __ stp(esp, zr, Address(__ pre(sp, -14 * wordSize))); 823 // add 2 zero-initialized slots for native calls 824 __ stp(zr, zr, Address(sp, 12 * wordSize)); 825 } else { 826 __ sub(esp, sp, 12 * wordSize); 827 __ ldr(rscratch1, Address(rmethod, Method::const_offset())); // get ConstMethod 828 __ add(rbcp, rscratch1, in_bytes(ConstMethod::codes_offset())); // get codebase 829 __ stp(esp, rbcp, Address(__ pre(sp, -12 * wordSize))); 830 } 831 832 if (ProfileInterpreter) { 833 Label method_data_continue; 834 __ ldr(rscratch1, Address(rmethod, Method::method_data_offset())); 835 __ cbz(rscratch1, method_data_continue); 836 __ lea(rscratch1, Address(rscratch1, in_bytes(MethodData::data_offset()))); 837 __ bind(method_data_continue); 838 __ stp(rscratch1, rmethod, Address(sp, 6 * wordSize)); // save Method* and mdp (method data pointer) 839 } else { 840 __ stp(zr, rmethod, Address(sp, 6 * wordSize)); // save Method* (no mdp) 841 } 842 843 // Get mirror and store it in the frame as GC root for this Method* 844 __ load_mirror(rscratch1, rmethod); 845 __ stp(rscratch1, zr, Address(sp, 4 * wordSize)); 846 847 __ ldr(rcpool, Address(rmethod, Method::const_offset())); 848 __ ldr(rcpool, Address(rcpool, ConstMethod::constants_offset())); 849 __ ldr(rcpool, Address(rcpool, ConstantPool::cache_offset_in_bytes())); 850 __ stp(rlocals, rcpool, Address(sp, 2 * wordSize)); 851 852 __ stp(rfp, lr, Address(sp, 10 * wordSize)); 853 __ lea(rfp, Address(sp, 10 * wordSize)); 854 855 // set sender sp 856 // leave last_sp as null 857 __ stp(zr, r13, Address(sp, 8 * wordSize)); 858 859 // Move SP out of the way 860 if (! native_call) { 861 __ ldr(rscratch1, Address(rmethod, Method::const_offset())); 862 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset())); 863 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2); 864 __ sub(rscratch1, sp, rscratch1, ext::uxtw, 3); 865 __ andr(sp, rscratch1, -16); 866 } 867 } 868 869 // End of helpers 870 871 // Various method entries 872 //------------------------------------------------------------------------------------------------------------------------ 873 // 874 // 875 876 // Method entry for java.lang.ref.Reference.get. 877 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) { 878 #if INCLUDE_ALL_GCS 879 // Code: _aload_0, _getfield, _areturn 880 // parameter size = 1 881 // 882 // The code that gets generated by this routine is split into 2 parts: 883 // 1. The "intrinsified" code for G1 (or any SATB based GC), 884 // 2. The slow path - which is an expansion of the regular method entry. 885 // 886 // Notes:- 887 // * In the G1 code we do not check whether we need to block for 888 // a safepoint. If G1 is enabled then we must execute the specialized 889 // code for Reference.get (except when the Reference object is null) 890 // so that we can log the value in the referent field with an SATB 891 // update buffer. 892 // If the code for the getfield template is modified so that the 893 // G1 pre-barrier code is executed when the current method is 894 // Reference.get() then going through the normal method entry 895 // will be fine. 896 // * The G1 code can, however, check the receiver object (the instance 897 // of java.lang.Reference) and jump to the slow path if null. If the 898 // Reference object is null then we obviously cannot fetch the referent 899 // and so we don't need to call the G1 pre-barrier. Thus we can use the 900 // regular method entry code to generate the NPE. 901 // 902 // This code is based on generate_accessor_entry. 903 // 904 // rmethod: Method* 905 // r13: senderSP must preserve for slow path, set SP to it on fast path 906 907 address entry = __ pc(); 908 909 const int referent_offset = java_lang_ref_Reference::referent_offset; 910 guarantee(referent_offset > 0, "referent offset not initialized"); 911 912 if (UseG1GC) { 913 Label slow_path; 914 const Register local_0 = c_rarg0; 915 // Check if local 0 != NULL 916 // If the receiver is null then it is OK to jump to the slow path. 917 __ ldr(local_0, Address(esp, 0)); 918 __ cbz(local_0, slow_path); 919 920 // Load the value of the referent field. 921 const Address field_address(local_0, referent_offset); 922 __ load_heap_oop(local_0, field_address); 923 924 __ mov(r19, r13); // Move senderSP to a callee-saved register 925 // Generate the G1 pre-barrier code to log the value of 926 // the referent field in an SATB buffer. 927 __ enter(); // g1_write may call runtime 928 __ g1_write_barrier_pre(noreg /* obj */, 929 local_0 /* pre_val */, 930 rthread /* thread */, 931 rscratch2 /* tmp */, 932 true /* tosca_live */, 933 true /* expand_call */); 934 __ leave(); 935 // areturn 936 __ andr(sp, r19, -16); // done with stack 937 __ ret(lr); 938 939 // generate a vanilla interpreter entry as the slow path 940 __ bind(slow_path); 941 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals)); 942 return entry; 943 } 944 #endif // INCLUDE_ALL_GCS 945 946 // If G1 is not enabled then attempt to go through the accessor entry point 947 // Reference.get is an accessor 948 return NULL; 949 } 950 951 /** 952 * Method entry for static native methods: 953 * int java.util.zip.CRC32.update(int crc, int b) 954 */ 955 address TemplateInterpreterGenerator::generate_CRC32_update_entry() { 956 if (UseCRC32Intrinsics) { 957 address entry = __ pc(); 958 959 // rmethod: Method* 960 // r13: senderSP must preserved for slow path 961 // esp: args 962 963 Label slow_path; 964 // If we need a safepoint check, generate full interpreter entry. 965 ExternalAddress state(SafepointSynchronize::address_of_state()); 966 unsigned long offset; 967 __ adrp(rscratch1, ExternalAddress(SafepointSynchronize::address_of_state()), offset); 968 __ ldrw(rscratch1, Address(rscratch1, offset)); 969 assert(SafepointSynchronize::_not_synchronized == 0, "rewrite this code"); 970 __ cbnz(rscratch1, slow_path); 971 972 // We don't generate local frame and don't align stack because 973 // we call stub code and there is no safepoint on this path. 974 975 // Load parameters 976 const Register crc = c_rarg0; // crc 977 const Register val = c_rarg1; // source java byte value 978 const Register tbl = c_rarg2; // scratch 979 980 // Arguments are reversed on java expression stack 981 __ ldrw(val, Address(esp, 0)); // byte value 982 __ ldrw(crc, Address(esp, wordSize)); // Initial CRC 983 984 __ adrp(tbl, ExternalAddress(StubRoutines::crc_table_addr()), offset); 985 __ add(tbl, tbl, offset); 986 987 __ ornw(crc, zr, crc); // ~crc 988 __ update_byte_crc32(crc, val, tbl); 989 __ ornw(crc, zr, crc); // ~crc 990 991 // result in c_rarg0 992 993 __ andr(sp, r13, -16); 994 __ ret(lr); 995 996 // generate a vanilla native entry as the slow path 997 __ bind(slow_path); 998 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native)); 999 return entry; 1000 } 1001 return NULL; 1002 } 1003 1004 /** 1005 * Method entry for static native methods: 1006 * int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len) 1007 * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len) 1008 */ 1009 address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) { 1010 if (UseCRC32Intrinsics) { 1011 address entry = __ pc(); 1012 1013 // rmethod,: Method* 1014 // r13: senderSP must preserved for slow path 1015 1016 Label slow_path; 1017 // If we need a safepoint check, generate full interpreter entry. 1018 ExternalAddress state(SafepointSynchronize::address_of_state()); 1019 unsigned long offset; 1020 __ adrp(rscratch1, ExternalAddress(SafepointSynchronize::address_of_state()), offset); 1021 __ ldrw(rscratch1, Address(rscratch1, offset)); 1022 assert(SafepointSynchronize::_not_synchronized == 0, "rewrite this code"); 1023 __ cbnz(rscratch1, slow_path); 1024 1025 // We don't generate local frame and don't align stack because 1026 // we call stub code and there is no safepoint on this path. 1027 1028 // Load parameters 1029 const Register crc = c_rarg0; // crc 1030 const Register buf = c_rarg1; // source java byte array address 1031 const Register len = c_rarg2; // length 1032 const Register off = len; // offset (never overlaps with 'len') 1033 1034 // Arguments are reversed on java expression stack 1035 // Calculate address of start element 1036 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) { 1037 __ ldr(buf, Address(esp, 2*wordSize)); // long buf 1038 __ ldrw(off, Address(esp, wordSize)); // offset 1039 __ add(buf, buf, off); // + offset 1040 __ ldrw(crc, Address(esp, 4*wordSize)); // Initial CRC 1041 } else { 1042 __ ldr(buf, Address(esp, 2*wordSize)); // byte[] array 1043 __ add(buf, buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size 1044 __ ldrw(off, Address(esp, wordSize)); // offset 1045 __ add(buf, buf, off); // + offset 1046 __ ldrw(crc, Address(esp, 3*wordSize)); // Initial CRC 1047 } 1048 // Can now load 'len' since we're finished with 'off' 1049 __ ldrw(len, Address(esp, 0x0)); // Length 1050 1051 __ andr(sp, r13, -16); // Restore the caller's SP 1052 1053 // We are frameless so we can just jump to the stub. 1054 __ b(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32())); 1055 1056 // generate a vanilla native entry as the slow path 1057 __ bind(slow_path); 1058 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native)); 1059 return entry; 1060 } 1061 return NULL; 1062 } 1063 1064 // Not supported 1065 address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) { 1066 return NULL; 1067 } 1068 1069 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { 1070 // Bang each page in the shadow zone. We can't assume it's been done for 1071 // an interpreter frame with greater than a page of locals, so each page 1072 // needs to be checked. Only true for non-native. 1073 if (UseStackBanging) { 1074 const int n_shadow_pages = JavaThread::stack_shadow_zone_size() / os::vm_page_size(); 1075 const int start_page = native_call ? n_shadow_pages : 1; 1076 const int page_size = os::vm_page_size(); 1077 for (int pages = start_page; pages <= n_shadow_pages ; pages++) { 1078 __ sub(rscratch2, sp, pages*page_size); 1079 __ str(zr, Address(rscratch2)); 1080 } 1081 } 1082 } 1083 1084 1085 // Interpreter stub for calling a native method. (asm interpreter) 1086 // This sets up a somewhat different looking stack for calling the 1087 // native method than the typical interpreter frame setup. 1088 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) { 1089 // determine code generation flags 1090 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 1091 1092 // r1: Method* 1093 // rscratch1: sender sp 1094 1095 address entry_point = __ pc(); 1096 1097 const Address constMethod (rmethod, Method::const_offset()); 1098 const Address access_flags (rmethod, Method::access_flags_offset()); 1099 const Address size_of_parameters(r2, ConstMethod:: 1100 size_of_parameters_offset()); 1101 1102 // get parameter size (always needed) 1103 __ ldr(r2, constMethod); 1104 __ load_unsigned_short(r2, size_of_parameters); 1105 1106 // Native calls don't need the stack size check since they have no 1107 // expression stack and the arguments are already on the stack and 1108 // we only add a handful of words to the stack. 1109 1110 // rmethod: Method* 1111 // r2: size of parameters 1112 // rscratch1: sender sp 1113 1114 // for natives the size of locals is zero 1115 1116 // compute beginning of parameters (rlocals) 1117 __ add(rlocals, esp, r2, ext::uxtx, 3); 1118 __ add(rlocals, rlocals, -wordSize); 1119 1120 // Pull SP back to minimum size: this avoids holes in the stack 1121 __ andr(sp, esp, -16); 1122 1123 // initialize fixed part of activation frame 1124 generate_fixed_frame(true); 1125 #ifndef PRODUCT 1126 // tell the simulator that a method has been entered 1127 if (NotifySimulator) { 1128 __ notify(Assembler::method_entry); 1129 } 1130 #endif 1131 1132 // make sure method is native & not abstract 1133 #ifdef ASSERT 1134 __ ldrw(r0, access_flags); 1135 { 1136 Label L; 1137 __ tst(r0, JVM_ACC_NATIVE); 1138 __ br(Assembler::NE, L); 1139 __ stop("tried to execute non-native method as native"); 1140 __ bind(L); 1141 } 1142 { 1143 Label L; 1144 __ tst(r0, JVM_ACC_ABSTRACT); 1145 __ br(Assembler::EQ, L); 1146 __ stop("tried to execute abstract method in interpreter"); 1147 __ bind(L); 1148 } 1149 #endif 1150 1151 // Since at this point in the method invocation the exception 1152 // handler would try to exit the monitor of synchronized methods 1153 // which hasn't been entered yet, we set the thread local variable 1154 // _do_not_unlock_if_synchronized to true. The remove_activation 1155 // will check this flag. 1156 1157 const Address do_not_unlock_if_synchronized(rthread, 1158 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 1159 __ mov(rscratch2, true); 1160 __ strb(rscratch2, do_not_unlock_if_synchronized); 1161 1162 // increment invocation count & check for overflow 1163 Label invocation_counter_overflow; 1164 if (inc_counter) { 1165 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); 1166 } 1167 1168 Label continue_after_compile; 1169 __ bind(continue_after_compile); 1170 1171 bang_stack_shadow_pages(true); 1172 1173 // reset the _do_not_unlock_if_synchronized flag 1174 __ strb(zr, do_not_unlock_if_synchronized); 1175 1176 // check for synchronized methods 1177 // Must happen AFTER invocation_counter check and stack overflow check, 1178 // so method is not locked if overflows. 1179 if (synchronized) { 1180 lock_method(); 1181 } else { 1182 // no synchronization necessary 1183 #ifdef ASSERT 1184 { 1185 Label L; 1186 __ ldrw(r0, access_flags); 1187 __ tst(r0, JVM_ACC_SYNCHRONIZED); 1188 __ br(Assembler::EQ, L); 1189 __ stop("method needs synchronization"); 1190 __ bind(L); 1191 } 1192 #endif 1193 } 1194 1195 // start execution 1196 #ifdef ASSERT 1197 { 1198 Label L; 1199 const Address monitor_block_top(rfp, 1200 frame::interpreter_frame_monitor_block_top_offset * wordSize); 1201 __ ldr(rscratch1, monitor_block_top); 1202 __ cmp(esp, rscratch1); 1203 __ br(Assembler::EQ, L); 1204 __ stop("broken stack frame setup in interpreter"); 1205 __ bind(L); 1206 } 1207 #endif 1208 1209 // jvmti support 1210 __ notify_method_entry(); 1211 1212 // work registers 1213 const Register t = r17; 1214 const Register result_handler = r19; 1215 1216 // allocate space for parameters 1217 __ ldr(t, Address(rmethod, Method::const_offset())); 1218 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset())); 1219 1220 __ sub(rscratch1, esp, t, ext::uxtx, Interpreter::logStackElementSize); 1221 __ andr(sp, rscratch1, -16); 1222 __ mov(esp, rscratch1); 1223 1224 // get signature handler 1225 { 1226 Label L; 1227 __ ldr(t, Address(rmethod, Method::signature_handler_offset())); 1228 __ cbnz(t, L); 1229 __ call_VM(noreg, 1230 CAST_FROM_FN_PTR(address, 1231 InterpreterRuntime::prepare_native_call), 1232 rmethod); 1233 __ ldr(t, Address(rmethod, Method::signature_handler_offset())); 1234 __ bind(L); 1235 } 1236 1237 // call signature handler 1238 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals, 1239 "adjust this code"); 1240 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == sp, 1241 "adjust this code"); 1242 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == rscratch1, 1243 "adjust this code"); 1244 1245 // The generated handlers do not touch rmethod (the method). 1246 // However, large signatures cannot be cached and are generated 1247 // each time here. The slow-path generator can do a GC on return, 1248 // so we must reload it after the call. 1249 __ blr(t); 1250 __ get_method(rmethod); // slow path can do a GC, reload rmethod 1251 1252 1253 // result handler is in r0 1254 // set result handler 1255 __ mov(result_handler, r0); 1256 // pass mirror handle if static call 1257 { 1258 Label L; 1259 __ ldrw(t, Address(rmethod, Method::access_flags_offset())); 1260 __ tbz(t, exact_log2(JVM_ACC_STATIC), L); 1261 // get mirror 1262 __ load_mirror(t, rmethod); 1263 // copy mirror into activation frame 1264 __ str(t, Address(rfp, frame::interpreter_frame_oop_temp_offset * wordSize)); 1265 // pass handle to mirror 1266 __ add(c_rarg1, rfp, frame::interpreter_frame_oop_temp_offset * wordSize); 1267 __ bind(L); 1268 } 1269 1270 // get native function entry point in r10 1271 { 1272 Label L; 1273 __ ldr(r10, Address(rmethod, Method::native_function_offset())); 1274 address unsatisfied = (SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); 1275 __ mov(rscratch2, unsatisfied); 1276 __ ldr(rscratch2, rscratch2); 1277 __ cmp(r10, rscratch2); 1278 __ br(Assembler::NE, L); 1279 __ call_VM(noreg, 1280 CAST_FROM_FN_PTR(address, 1281 InterpreterRuntime::prepare_native_call), 1282 rmethod); 1283 __ get_method(rmethod); 1284 __ ldr(r10, Address(rmethod, Method::native_function_offset())); 1285 __ bind(L); 1286 } 1287 1288 // pass JNIEnv 1289 __ add(c_rarg0, rthread, in_bytes(JavaThread::jni_environment_offset())); 1290 1291 // It is enough that the pc() points into the right code 1292 // segment. It does not have to be the correct return pc. 1293 __ set_last_Java_frame(esp, rfp, (address)NULL, rscratch1); 1294 1295 // change thread state 1296 #ifdef ASSERT 1297 { 1298 Label L; 1299 __ ldrw(t, Address(rthread, JavaThread::thread_state_offset())); 1300 __ cmp(t, _thread_in_Java); 1301 __ br(Assembler::EQ, L); 1302 __ stop("Wrong thread state in native stub"); 1303 __ bind(L); 1304 } 1305 #endif 1306 1307 // Change state to native 1308 __ mov(rscratch1, _thread_in_native); 1309 __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset())); 1310 __ stlrw(rscratch1, rscratch2); 1311 1312 // Call the native method. 1313 __ blrt(r10, rscratch1); 1314 __ maybe_isb(); 1315 __ get_method(rmethod); 1316 // result potentially in r0 or v0 1317 1318 // make room for the pushes we're about to do 1319 __ sub(rscratch1, esp, 4 * wordSize); 1320 __ andr(sp, rscratch1, -16); 1321 1322 // NOTE: The order of these pushes is known to frame::interpreter_frame_result 1323 // in order to extract the result of a method call. If the order of these 1324 // pushes change or anything else is added to the stack then the code in 1325 // interpreter_frame_result must also change. 1326 __ push(dtos); 1327 __ push(ltos); 1328 1329 // change thread state 1330 __ mov(rscratch1, _thread_in_native_trans); 1331 __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset())); 1332 __ stlrw(rscratch1, rscratch2); 1333 1334 if (os::is_MP()) { 1335 if (UseMembar) { 1336 // Force this write out before the read below 1337 __ dsb(Assembler::SY); 1338 } else { 1339 // Write serialization page so VM thread can do a pseudo remote membar. 1340 // We use the current thread pointer to calculate a thread specific 1341 // offset to write to within the page. This minimizes bus traffic 1342 // due to cache line collision. 1343 __ serialize_memory(rthread, rscratch2); 1344 } 1345 } 1346 1347 // check for safepoint operation in progress and/or pending suspend requests 1348 { 1349 Label Continue; 1350 { 1351 unsigned long offset; 1352 __ adrp(rscratch2, SafepointSynchronize::address_of_state(), offset); 1353 __ ldrw(rscratch2, Address(rscratch2, offset)); 1354 } 1355 assert(SafepointSynchronize::_not_synchronized == 0, 1356 "SafepointSynchronize::_not_synchronized"); 1357 Label L; 1358 __ cbnz(rscratch2, L); 1359 __ ldrw(rscratch2, Address(rthread, JavaThread::suspend_flags_offset())); 1360 __ cbz(rscratch2, Continue); 1361 __ bind(L); 1362 1363 // Don't use call_VM as it will see a possible pending exception 1364 // and forward it and never return here preventing us from 1365 // clearing _last_native_pc down below. So we do a runtime call by 1366 // hand. 1367 // 1368 __ mov(c_rarg0, rthread); 1369 __ mov(rscratch2, CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)); 1370 __ blrt(rscratch2, 1, 0, 0); 1371 __ maybe_isb(); 1372 __ get_method(rmethod); 1373 __ reinit_heapbase(); 1374 __ bind(Continue); 1375 } 1376 1377 // change thread state 1378 __ mov(rscratch1, _thread_in_Java); 1379 __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset())); 1380 __ stlrw(rscratch1, rscratch2); 1381 1382 // reset_last_Java_frame 1383 __ reset_last_Java_frame(true); 1384 1385 if (CheckJNICalls) { 1386 // clear_pending_jni_exception_check 1387 __ str(zr, Address(rthread, JavaThread::pending_jni_exception_check_fn_offset())); 1388 } 1389 1390 // reset handle block 1391 __ ldr(t, Address(rthread, JavaThread::active_handles_offset())); 1392 __ str(zr, Address(t, JNIHandleBlock::top_offset_in_bytes())); 1393 1394 // If result is an oop unbox and store it in frame where gc will see it 1395 // and result handler will pick it up 1396 1397 { 1398 Label no_oop, not_weak, store_result; 1399 __ adr(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT))); 1400 __ cmp(t, result_handler); 1401 __ br(Assembler::NE, no_oop); 1402 // Unbox oop result, e.g. JNIHandles::resolve result. 1403 __ pop(ltos); 1404 __ cbz(r0, store_result); // Use NULL as-is. 1405 STATIC_ASSERT(JNIHandles::weak_tag_mask == 1u); 1406 __ tbz(r0, 0, not_weak); // Test for jweak tag. 1407 // Resolve jweak. 1408 __ ldr(r0, Address(r0, -JNIHandles::weak_tag_value)); 1409 #if INCLUDE_ALL_GCS 1410 if (UseG1GC) { 1411 __ enter(); // Barrier may call runtime. 1412 __ g1_write_barrier_pre(noreg /* obj */, 1413 r0 /* pre_val */, 1414 rthread /* thread */, 1415 t /* tmp */, 1416 true /* tosca_live */, 1417 true /* expand_call */); 1418 __ leave(); 1419 } 1420 #endif // INCLUDE_ALL_GCS 1421 __ b(store_result); 1422 __ bind(not_weak); 1423 // Resolve (untagged) jobject. 1424 __ ldr(r0, Address(r0, 0)); 1425 __ bind(store_result); 1426 __ str(r0, Address(rfp, frame::interpreter_frame_oop_temp_offset*wordSize)); 1427 // keep stack depth as expected by pushing oop which will eventually be discarded 1428 __ push(ltos); 1429 __ bind(no_oop); 1430 } 1431 1432 { 1433 Label no_reguard; 1434 __ lea(rscratch1, Address(rthread, in_bytes(JavaThread::stack_guard_state_offset()))); 1435 __ ldrw(rscratch1, Address(rscratch1)); 1436 __ cmp(rscratch1, JavaThread::stack_guard_yellow_reserved_disabled); 1437 __ br(Assembler::NE, no_reguard); 1438 1439 __ pusha(); // XXX only save smashed registers 1440 __ mov(c_rarg0, rthread); 1441 __ mov(rscratch2, CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)); 1442 __ blrt(rscratch2, 0, 0, 0); 1443 __ popa(); // XXX only restore smashed registers 1444 __ bind(no_reguard); 1445 } 1446 1447 // The method register is junk from after the thread_in_native transition 1448 // until here. Also can't call_VM until the bcp has been 1449 // restored. Need bcp for throwing exception below so get it now. 1450 __ get_method(rmethod); 1451 1452 // restore bcp to have legal interpreter frame, i.e., bci == 0 <=> 1453 // rbcp == code_base() 1454 __ ldr(rbcp, Address(rmethod, Method::const_offset())); // get ConstMethod* 1455 __ add(rbcp, rbcp, in_bytes(ConstMethod::codes_offset())); // get codebase 1456 // handle exceptions (exception handling will handle unlocking!) 1457 { 1458 Label L; 1459 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); 1460 __ cbz(rscratch1, L); 1461 // Note: At some point we may want to unify this with the code 1462 // used in call_VM_base(); i.e., we should use the 1463 // StubRoutines::forward_exception code. For now this doesn't work 1464 // here because the rsp is not correctly set at this point. 1465 __ MacroAssembler::call_VM(noreg, 1466 CAST_FROM_FN_PTR(address, 1467 InterpreterRuntime::throw_pending_exception)); 1468 __ should_not_reach_here(); 1469 __ bind(L); 1470 } 1471 1472 // do unlocking if necessary 1473 { 1474 Label L; 1475 __ ldrw(t, Address(rmethod, Method::access_flags_offset())); 1476 __ tbz(t, exact_log2(JVM_ACC_SYNCHRONIZED), L); 1477 // the code below should be shared with interpreter macro 1478 // assembler implementation 1479 { 1480 Label unlock; 1481 // BasicObjectLock will be first in list, since this is a 1482 // synchronized method. However, need to check that the object 1483 // has not been unlocked by an explicit monitorexit bytecode. 1484 1485 // monitor expect in c_rarg1 for slow unlock path 1486 __ lea (c_rarg1, Address(rfp, // address of first monitor 1487 (intptr_t)(frame::interpreter_frame_initial_sp_offset * 1488 wordSize - sizeof(BasicObjectLock)))); 1489 1490 __ ldr(t, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); 1491 __ cbnz(t, unlock); 1492 1493 // Entry already unlocked, need to throw exception 1494 __ MacroAssembler::call_VM(noreg, 1495 CAST_FROM_FN_PTR(address, 1496 InterpreterRuntime::throw_illegal_monitor_state_exception)); 1497 __ should_not_reach_here(); 1498 1499 __ bind(unlock); 1500 __ unlock_object(c_rarg1); 1501 } 1502 __ bind(L); 1503 } 1504 1505 // jvmti support 1506 // Note: This must happen _after_ handling/throwing any exceptions since 1507 // the exception handler code notifies the runtime of method exits 1508 // too. If this happens before, method entry/exit notifications are 1509 // not properly paired (was bug - gri 11/22/99). 1510 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI); 1511 1512 // restore potential result in r0:d0, call result handler to 1513 // restore potential result in ST0 & handle result 1514 1515 __ pop(ltos); 1516 __ pop(dtos); 1517 1518 __ blr(result_handler); 1519 1520 // remove activation 1521 __ ldr(esp, Address(rfp, 1522 frame::interpreter_frame_sender_sp_offset * 1523 wordSize)); // get sender sp 1524 // remove frame anchor 1525 __ leave(); 1526 1527 // resture sender sp 1528 __ mov(sp, esp); 1529 1530 __ ret(lr); 1531 1532 if (inc_counter) { 1533 // Handle overflow of counter and compile method 1534 __ bind(invocation_counter_overflow); 1535 generate_counter_overflow(continue_after_compile); 1536 } 1537 1538 return entry_point; 1539 } 1540 1541 // 1542 // Generic interpreted method entry to (asm) interpreter 1543 // 1544 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) { 1545 // determine code generation flags 1546 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 1547 1548 // rscratch1: sender sp 1549 address entry_point = __ pc(); 1550 1551 const Address constMethod(rmethod, Method::const_offset()); 1552 const Address access_flags(rmethod, Method::access_flags_offset()); 1553 const Address size_of_parameters(r3, 1554 ConstMethod::size_of_parameters_offset()); 1555 const Address size_of_locals(r3, ConstMethod::size_of_locals_offset()); 1556 1557 // get parameter size (always needed) 1558 // need to load the const method first 1559 __ ldr(r3, constMethod); 1560 __ load_unsigned_short(r2, size_of_parameters); 1561 1562 // r2: size of parameters 1563 1564 __ load_unsigned_short(r3, size_of_locals); // get size of locals in words 1565 __ sub(r3, r3, r2); // r3 = no. of additional locals 1566 1567 // see if we've got enough room on the stack for locals plus overhead. 1568 generate_stack_overflow_check(); 1569 1570 // compute beginning of parameters (rlocals) 1571 __ add(rlocals, esp, r2, ext::uxtx, 3); 1572 __ sub(rlocals, rlocals, wordSize); 1573 1574 // Make room for locals 1575 __ sub(rscratch1, esp, r3, ext::uxtx, 3); 1576 __ andr(sp, rscratch1, -16); 1577 1578 // r3 - # of additional locals 1579 // allocate space for locals 1580 // explicitly initialize locals 1581 { 1582 Label exit, loop; 1583 __ ands(zr, r3, r3); 1584 __ br(Assembler::LE, exit); // do nothing if r3 <= 0 1585 __ bind(loop); 1586 __ str(zr, Address(__ post(rscratch1, wordSize))); 1587 __ sub(r3, r3, 1); // until everything initialized 1588 __ cbnz(r3, loop); 1589 __ bind(exit); 1590 } 1591 1592 // And the base dispatch table 1593 __ get_dispatch(); 1594 1595 // initialize fixed part of activation frame 1596 generate_fixed_frame(false); 1597 #ifndef PRODUCT 1598 // tell the simulator that a method has been entered 1599 if (NotifySimulator) { 1600 __ notify(Assembler::method_entry); 1601 } 1602 #endif 1603 // make sure method is not native & not abstract 1604 #ifdef ASSERT 1605 __ ldrw(r0, access_flags); 1606 { 1607 Label L; 1608 __ tst(r0, JVM_ACC_NATIVE); 1609 __ br(Assembler::EQ, L); 1610 __ stop("tried to execute native method as non-native"); 1611 __ bind(L); 1612 } 1613 { 1614 Label L; 1615 __ tst(r0, JVM_ACC_ABSTRACT); 1616 __ br(Assembler::EQ, L); 1617 __ stop("tried to execute abstract method in interpreter"); 1618 __ bind(L); 1619 } 1620 #endif 1621 1622 // Since at this point in the method invocation the exception 1623 // handler would try to exit the monitor of synchronized methods 1624 // which hasn't been entered yet, we set the thread local variable 1625 // _do_not_unlock_if_synchronized to true. The remove_activation 1626 // will check this flag. 1627 1628 const Address do_not_unlock_if_synchronized(rthread, 1629 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 1630 __ mov(rscratch2, true); 1631 __ strb(rscratch2, do_not_unlock_if_synchronized); 1632 1633 // increment invocation count & check for overflow 1634 Label invocation_counter_overflow; 1635 Label profile_method; 1636 Label profile_method_continue; 1637 if (inc_counter) { 1638 generate_counter_incr(&invocation_counter_overflow, 1639 &profile_method, 1640 &profile_method_continue); 1641 if (ProfileInterpreter) { 1642 __ bind(profile_method_continue); 1643 } 1644 } 1645 1646 Label continue_after_compile; 1647 __ bind(continue_after_compile); 1648 1649 bang_stack_shadow_pages(false); 1650 1651 // reset the _do_not_unlock_if_synchronized flag 1652 __ strb(zr, do_not_unlock_if_synchronized); 1653 1654 // check for synchronized methods 1655 // Must happen AFTER invocation_counter check and stack overflow check, 1656 // so method is not locked if overflows. 1657 if (synchronized) { 1658 // Allocate monitor and lock method 1659 lock_method(); 1660 } else { 1661 // no synchronization necessary 1662 #ifdef ASSERT 1663 { 1664 Label L; 1665 __ ldrw(r0, access_flags); 1666 __ tst(r0, JVM_ACC_SYNCHRONIZED); 1667 __ br(Assembler::EQ, L); 1668 __ stop("method needs synchronization"); 1669 __ bind(L); 1670 } 1671 #endif 1672 } 1673 1674 // start execution 1675 #ifdef ASSERT 1676 { 1677 Label L; 1678 const Address monitor_block_top (rfp, 1679 frame::interpreter_frame_monitor_block_top_offset * wordSize); 1680 __ ldr(rscratch1, monitor_block_top); 1681 __ cmp(esp, rscratch1); 1682 __ br(Assembler::EQ, L); 1683 __ stop("broken stack frame setup in interpreter"); 1684 __ bind(L); 1685 } 1686 #endif 1687 1688 // jvmti support 1689 __ notify_method_entry(); 1690 1691 __ dispatch_next(vtos); 1692 1693 // invocation counter overflow 1694 if (inc_counter) { 1695 if (ProfileInterpreter) { 1696 // We have decided to profile this method in the interpreter 1697 __ bind(profile_method); 1698 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); 1699 __ set_method_data_pointer_for_bcp(); 1700 // don't think we need this 1701 __ get_method(r1); 1702 __ b(profile_method_continue); 1703 } 1704 // Handle overflow of counter and compile method 1705 __ bind(invocation_counter_overflow); 1706 generate_counter_overflow(continue_after_compile); 1707 } 1708 1709 return entry_point; 1710 } 1711 1712 //----------------------------------------------------------------------------- 1713 // Exceptions 1714 1715 void TemplateInterpreterGenerator::generate_throw_exception() { 1716 // Entry point in previous activation (i.e., if the caller was 1717 // interpreted) 1718 Interpreter::_rethrow_exception_entry = __ pc(); 1719 // Restore sp to interpreter_frame_last_sp even though we are going 1720 // to empty the expression stack for the exception processing. 1721 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); 1722 // r0: exception 1723 // r3: return address/pc that threw exception 1724 __ restore_bcp(); // rbcp points to call/send 1725 __ restore_locals(); 1726 __ restore_constant_pool_cache(); 1727 __ reinit_heapbase(); // restore rheapbase as heapbase. 1728 __ get_dispatch(); 1729 1730 #ifndef PRODUCT 1731 // tell the simulator that the caller method has been reentered 1732 if (NotifySimulator) { 1733 __ get_method(rmethod); 1734 __ notify(Assembler::method_reentry); 1735 } 1736 #endif 1737 // Entry point for exceptions thrown within interpreter code 1738 Interpreter::_throw_exception_entry = __ pc(); 1739 // If we came here via a NullPointerException on the receiver of a 1740 // method, rmethod may be corrupt. 1741 __ get_method(rmethod); 1742 // expression stack is undefined here 1743 // r0: exception 1744 // rbcp: exception bcp 1745 __ verify_oop(r0); 1746 __ mov(c_rarg1, r0); 1747 1748 // expression stack must be empty before entering the VM in case of 1749 // an exception 1750 __ empty_expression_stack(); 1751 // find exception handler address and preserve exception oop 1752 __ call_VM(r3, 1753 CAST_FROM_FN_PTR(address, 1754 InterpreterRuntime::exception_handler_for_exception), 1755 c_rarg1); 1756 1757 // Calculate stack limit 1758 __ ldr(rscratch1, Address(rmethod, Method::const_offset())); 1759 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset())); 1760 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 4); 1761 __ ldr(rscratch2, 1762 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize)); 1763 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtx, 3); 1764 __ andr(sp, rscratch1, -16); 1765 1766 // r0: exception handler entry point 1767 // r3: preserved exception oop 1768 // rbcp: bcp for exception handler 1769 __ push_ptr(r3); // push exception which is now the only value on the stack 1770 __ br(r0); // jump to exception handler (may be _remove_activation_entry!) 1771 1772 // If the exception is not handled in the current frame the frame is 1773 // removed and the exception is rethrown (i.e. exception 1774 // continuation is _rethrow_exception). 1775 // 1776 // Note: At this point the bci is still the bxi for the instruction 1777 // which caused the exception and the expression stack is 1778 // empty. Thus, for any VM calls at this point, GC will find a legal 1779 // oop map (with empty expression stack). 1780 1781 // 1782 // JVMTI PopFrame support 1783 // 1784 1785 Interpreter::_remove_activation_preserving_args_entry = __ pc(); 1786 __ empty_expression_stack(); 1787 // Set the popframe_processing bit in pending_popframe_condition 1788 // indicating that we are currently handling popframe, so that 1789 // call_VMs that may happen later do not trigger new popframe 1790 // handling cycles. 1791 __ ldrw(r3, Address(rthread, JavaThread::popframe_condition_offset())); 1792 __ orr(r3, r3, JavaThread::popframe_processing_bit); 1793 __ strw(r3, Address(rthread, JavaThread::popframe_condition_offset())); 1794 1795 { 1796 // Check to see whether we are returning to a deoptimized frame. 1797 // (The PopFrame call ensures that the caller of the popped frame is 1798 // either interpreted or compiled and deoptimizes it if compiled.) 1799 // In this case, we can't call dispatch_next() after the frame is 1800 // popped, but instead must save the incoming arguments and restore 1801 // them after deoptimization has occurred. 1802 // 1803 // Note that we don't compare the return PC against the 1804 // deoptimization blob's unpack entry because of the presence of 1805 // adapter frames in C2. 1806 Label caller_not_deoptimized; 1807 __ ldr(c_rarg1, Address(rfp, frame::return_addr_offset * wordSize)); 1808 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1809 InterpreterRuntime::interpreter_contains), c_rarg1); 1810 __ cbnz(r0, caller_not_deoptimized); 1811 1812 // Compute size of arguments for saving when returning to 1813 // deoptimized caller 1814 __ get_method(r0); 1815 __ ldr(r0, Address(r0, Method::const_offset())); 1816 __ load_unsigned_short(r0, Address(r0, in_bytes(ConstMethod:: 1817 size_of_parameters_offset()))); 1818 __ lsl(r0, r0, Interpreter::logStackElementSize); 1819 __ restore_locals(); // XXX do we need this? 1820 __ sub(rlocals, rlocals, r0); 1821 __ add(rlocals, rlocals, wordSize); 1822 // Save these arguments 1823 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1824 Deoptimization:: 1825 popframe_preserve_args), 1826 rthread, r0, rlocals); 1827 1828 __ remove_activation(vtos, 1829 /* throw_monitor_exception */ false, 1830 /* install_monitor_exception */ false, 1831 /* notify_jvmdi */ false); 1832 1833 // Inform deoptimization that it is responsible for restoring 1834 // these arguments 1835 __ mov(rscratch1, JavaThread::popframe_force_deopt_reexecution_bit); 1836 __ strw(rscratch1, Address(rthread, JavaThread::popframe_condition_offset())); 1837 1838 // Continue in deoptimization handler 1839 __ ret(lr); 1840 1841 __ bind(caller_not_deoptimized); 1842 } 1843 1844 __ remove_activation(vtos, 1845 /* throw_monitor_exception */ false, 1846 /* install_monitor_exception */ false, 1847 /* notify_jvmdi */ false); 1848 1849 // Restore the last_sp and null it out 1850 __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); 1851 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize)); 1852 1853 __ restore_bcp(); 1854 __ restore_locals(); 1855 __ restore_constant_pool_cache(); 1856 __ get_method(rmethod); 1857 1858 // The method data pointer was incremented already during 1859 // call profiling. We have to restore the mdp for the current bcp. 1860 if (ProfileInterpreter) { 1861 __ set_method_data_pointer_for_bcp(); 1862 } 1863 1864 // Clear the popframe condition flag 1865 __ strw(zr, Address(rthread, JavaThread::popframe_condition_offset())); 1866 assert(JavaThread::popframe_inactive == 0, "fix popframe_inactive"); 1867 1868 #if INCLUDE_JVMTI 1869 { 1870 Label L_done; 1871 1872 __ ldrb(rscratch1, Address(rbcp, 0)); 1873 __ cmpw(r1, Bytecodes::_invokestatic); 1874 __ br(Assembler::EQ, L_done); 1875 1876 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call. 1877 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL. 1878 1879 __ ldr(c_rarg0, Address(rlocals, 0)); 1880 __ call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), c_rarg0, rmethod, rbcp); 1881 1882 __ cbz(r0, L_done); 1883 1884 __ str(r0, Address(esp, 0)); 1885 __ bind(L_done); 1886 } 1887 #endif // INCLUDE_JVMTI 1888 1889 // Restore machine SP 1890 __ ldr(rscratch1, Address(rmethod, Method::const_offset())); 1891 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset())); 1892 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 4); 1893 __ ldr(rscratch2, 1894 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize)); 1895 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtw, 3); 1896 __ andr(sp, rscratch1, -16); 1897 1898 __ dispatch_next(vtos); 1899 // end of PopFrame support 1900 1901 Interpreter::_remove_activation_entry = __ pc(); 1902 1903 // preserve exception over this code sequence 1904 __ pop_ptr(r0); 1905 __ str(r0, Address(rthread, JavaThread::vm_result_offset())); 1906 // remove the activation (without doing throws on illegalMonitorExceptions) 1907 __ remove_activation(vtos, false, true, false); 1908 // restore exception 1909 // restore exception 1910 __ get_vm_result(r0, rthread); 1911 1912 // In between activations - previous activation type unknown yet 1913 // compute continuation point - the continuation point expects the 1914 // following registers set up: 1915 // 1916 // r0: exception 1917 // lr: return address/pc that threw exception 1918 // rsp: expression stack of caller 1919 // rfp: fp of caller 1920 // FIXME: There's no point saving LR here because VM calls don't trash it 1921 __ stp(r0, lr, Address(__ pre(sp, -2 * wordSize))); // save exception & return address 1922 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1923 SharedRuntime::exception_handler_for_return_address), 1924 rthread, lr); 1925 __ mov(r1, r0); // save exception handler 1926 __ ldp(r0, lr, Address(__ post(sp, 2 * wordSize))); // restore exception & return address 1927 // We might be returning to a deopt handler that expects r3 to 1928 // contain the exception pc 1929 __ mov(r3, lr); 1930 // Note that an "issuing PC" is actually the next PC after the call 1931 __ br(r1); // jump to exception 1932 // handler of caller 1933 } 1934 1935 1936 // 1937 // JVMTI ForceEarlyReturn support 1938 // 1939 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { 1940 address entry = __ pc(); 1941 1942 __ restore_bcp(); 1943 __ restore_locals(); 1944 __ empty_expression_stack(); 1945 __ load_earlyret_value(state); 1946 1947 __ ldr(rscratch1, Address(rthread, JavaThread::jvmti_thread_state_offset())); 1948 Address cond_addr(rscratch1, JvmtiThreadState::earlyret_state_offset()); 1949 1950 // Clear the earlyret state 1951 assert(JvmtiThreadState::earlyret_inactive == 0, "should be"); 1952 __ str(zr, cond_addr); 1953 1954 __ remove_activation(state, 1955 false, /* throw_monitor_exception */ 1956 false, /* install_monitor_exception */ 1957 true); /* notify_jvmdi */ 1958 __ ret(lr); 1959 1960 return entry; 1961 } // end of ForceEarlyReturn support 1962 1963 1964 1965 //----------------------------------------------------------------------------- 1966 // Helper for vtos entry point generation 1967 1968 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, 1969 address& bep, 1970 address& cep, 1971 address& sep, 1972 address& aep, 1973 address& iep, 1974 address& lep, 1975 address& fep, 1976 address& dep, 1977 address& vep) { 1978 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); 1979 Label L; 1980 aep = __ pc(); __ push_ptr(); __ b(L); 1981 fep = __ pc(); __ push_f(); __ b(L); 1982 dep = __ pc(); __ push_d(); __ b(L); 1983 lep = __ pc(); __ push_l(); __ b(L); 1984 bep = cep = sep = 1985 iep = __ pc(); __ push_i(); 1986 vep = __ pc(); 1987 __ bind(L); 1988 generate_and_dispatch(t); 1989 } 1990 1991 //----------------------------------------------------------------------------- 1992 1993 // Non-product code 1994 #ifndef PRODUCT 1995 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { 1996 address entry = __ pc(); 1997 1998 __ push(lr); 1999 __ push(state); 2000 __ push(RegSet::range(r0, r15), sp); 2001 __ mov(c_rarg2, r0); // Pass itos 2002 __ call_VM(noreg, 2003 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), 2004 c_rarg1, c_rarg2, c_rarg3); 2005 __ pop(RegSet::range(r0, r15), sp); 2006 __ pop(state); 2007 __ pop(lr); 2008 __ ret(lr); // return from result handler 2009 2010 return entry; 2011 } 2012 2013 void TemplateInterpreterGenerator::count_bytecode() { 2014 Register rscratch3 = r0; 2015 __ push(rscratch1); 2016 __ push(rscratch2); 2017 __ push(rscratch3); 2018 __ mov(rscratch3, (address) &BytecodeCounter::_counter_value); 2019 __ atomic_add(noreg, 1, rscratch3); 2020 __ pop(rscratch3); 2021 __ pop(rscratch2); 2022 __ pop(rscratch1); 2023 } 2024 2025 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { ; } 2026 2027 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { ; } 2028 2029 2030 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { 2031 // Call a little run-time stub to avoid blow-up for each bytecode. 2032 // The run-time runtime saves the right registers, depending on 2033 // the tosca in-state for the given template. 2034 2035 assert(Interpreter::trace_code(t->tos_in()) != NULL, 2036 "entry must have been generated"); 2037 __ bl(Interpreter::trace_code(t->tos_in())); 2038 __ reinit_heapbase(); 2039 } 2040 2041 2042 void TemplateInterpreterGenerator::stop_interpreter_at() { 2043 Label L; 2044 __ push(rscratch1); 2045 __ mov(rscratch1, (address) &BytecodeCounter::_counter_value); 2046 __ ldr(rscratch1, Address(rscratch1)); 2047 __ mov(rscratch2, StopInterpreterAt); 2048 __ cmpw(rscratch1, rscratch2); 2049 __ br(Assembler::NE, L); 2050 __ brk(0); 2051 __ bind(L); 2052 __ pop(rscratch1); 2053 } 2054 2055 #ifdef BUILTIN_SIM 2056 2057 #include <sys/mman.h> 2058 #include <unistd.h> 2059 2060 extern "C" { 2061 static int PAGESIZE = getpagesize(); 2062 int is_mapped_address(u_int64_t address) 2063 { 2064 address = (address & ~((u_int64_t)PAGESIZE - 1)); 2065 if (msync((void *)address, PAGESIZE, MS_ASYNC) == 0) { 2066 return true; 2067 } 2068 if (errno != ENOMEM) { 2069 return true; 2070 } 2071 return false; 2072 } 2073 2074 void bccheck1(u_int64_t pc, u_int64_t fp, char *method, int *bcidx, int *framesize, char *decode) 2075 { 2076 if (method != 0) { 2077 method[0] = '\0'; 2078 } 2079 if (bcidx != 0) { 2080 *bcidx = -2; 2081 } 2082 if (decode != 0) { 2083 decode[0] = 0; 2084 } 2085 2086 if (framesize != 0) { 2087 *framesize = -1; 2088 } 2089 2090 if (Interpreter::contains((address)pc)) { 2091 AArch64Simulator *sim = AArch64Simulator::get_current(UseSimulatorCache, DisableBCCheck); 2092 Method* meth; 2093 address bcp; 2094 if (fp) { 2095 #define FRAME_SLOT_METHOD 3 2096 #define FRAME_SLOT_BCP 7 2097 meth = (Method*)sim->getMemory()->loadU64(fp - (FRAME_SLOT_METHOD << 3)); 2098 bcp = (address)sim->getMemory()->loadU64(fp - (FRAME_SLOT_BCP << 3)); 2099 #undef FRAME_SLOT_METHOD 2100 #undef FRAME_SLOT_BCP 2101 } else { 2102 meth = (Method*)sim->getCPUState().xreg(RMETHOD, 0); 2103 bcp = (address)sim->getCPUState().xreg(RBCP, 0); 2104 } 2105 if (meth->is_native()) { 2106 return; 2107 } 2108 if(method && meth->is_method()) { 2109 ResourceMark rm; 2110 method[0] = 'I'; 2111 method[1] = ' '; 2112 meth->name_and_sig_as_C_string(method + 2, 398); 2113 } 2114 if (bcidx) { 2115 if (meth->contains(bcp)) { 2116 *bcidx = meth->bci_from(bcp); 2117 } else { 2118 *bcidx = -2; 2119 } 2120 } 2121 if (decode) { 2122 if (!BytecodeTracer::closure()) { 2123 BytecodeTracer::set_closure(BytecodeTracer::std_closure()); 2124 } 2125 stringStream str(decode, 400); 2126 BytecodeTracer::trace(meth, bcp, &str); 2127 } 2128 } else { 2129 if (method) { 2130 CodeBlob *cb = CodeCache::find_blob((address)pc); 2131 if (cb != NULL) { 2132 if (cb->is_nmethod()) { 2133 ResourceMark rm; 2134 nmethod* nm = (nmethod*)cb; 2135 method[0] = 'C'; 2136 method[1] = ' '; 2137 nm->method()->name_and_sig_as_C_string(method + 2, 398); 2138 } else if (cb->is_adapter_blob()) { 2139 strcpy(method, "B adapter blob"); 2140 } else if (cb->is_runtime_stub()) { 2141 strcpy(method, "B runtime stub"); 2142 } else if (cb->is_exception_stub()) { 2143 strcpy(method, "B exception stub"); 2144 } else if (cb->is_deoptimization_stub()) { 2145 strcpy(method, "B deoptimization stub"); 2146 } else if (cb->is_safepoint_stub()) { 2147 strcpy(method, "B safepoint stub"); 2148 } else if (cb->is_uncommon_trap_stub()) { 2149 strcpy(method, "B uncommon trap stub"); 2150 } else if (cb->contains((address)StubRoutines::call_stub())) { 2151 strcpy(method, "B call stub"); 2152 } else { 2153 strcpy(method, "B unknown blob : "); 2154 strcat(method, cb->name()); 2155 } 2156 if (framesize != NULL) { 2157 *framesize = cb->frame_size(); 2158 } 2159 } 2160 } 2161 } 2162 } 2163 2164 2165 JNIEXPORT void bccheck(u_int64_t pc, u_int64_t fp, char *method, int *bcidx, int *framesize, char *decode) 2166 { 2167 bccheck1(pc, fp, method, bcidx, framesize, decode); 2168 } 2169 } 2170 2171 #endif // BUILTIN_SIM 2172 #endif // !PRODUCT