1 /* 2 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2016, 2018, 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 "gc/shared/barrierSetAssembler.hpp" 29 #include "interpreter/abstractInterpreter.hpp" 30 #include "interpreter/bytecodeHistogram.hpp" 31 #include "interpreter/interpreter.hpp" 32 #include "interpreter/interpreterRuntime.hpp" 33 #include "interpreter/interp_masm.hpp" 34 #include "interpreter/templateInterpreterGenerator.hpp" 35 #include "interpreter/templateTable.hpp" 36 #include "oops/arrayOop.hpp" 37 #include "oops/oop.inline.hpp" 38 #include "prims/jvmtiExport.hpp" 39 #include "prims/jvmtiThreadState.hpp" 40 #include "runtime/arguments.hpp" 41 #include "runtime/deoptimization.hpp" 42 #include "runtime/frame.inline.hpp" 43 #include "runtime/sharedRuntime.hpp" 44 #include "runtime/stubRoutines.hpp" 45 #include "runtime/synchronizer.hpp" 46 #include "runtime/timer.hpp" 47 #include "runtime/vframeArray.hpp" 48 #include "utilities/debug.hpp" 49 50 51 // Size of interpreter code. Increase if too small. Interpreter will 52 // fail with a guarantee ("not enough space for interpreter generation"); 53 // if too small. 54 // Run with +PrintInterpreter to get the VM to print out the size. 55 // Max size with JVMTI 56 int TemplateInterpreter::InterpreterCodeSize = 320*K; 57 58 #undef __ 59 #ifdef PRODUCT 60 #define __ _masm-> 61 #else 62 #define __ _masm-> 63 // #define __ (Verbose ? (_masm->block_comment(FILE_AND_LINE),_masm):_masm)-> 64 #endif 65 66 #define BLOCK_COMMENT(str) __ block_comment(str) 67 #define BIND(label) __ bind(label); BLOCK_COMMENT(#label ":") 68 69 #define oop_tmp_offset _z_ijava_state_neg(oop_tmp) 70 71 //----------------------------------------------------------------------------- 72 73 address TemplateInterpreterGenerator::generate_slow_signature_handler() { 74 // 75 // New slow_signature handler that respects the z/Architecture 76 // C calling conventions. 77 // 78 // We get called by the native entry code with our output register 79 // area == 8. First we call InterpreterRuntime::get_result_handler 80 // to copy the pointer to the signature string temporarily to the 81 // first C-argument and to return the result_handler in 82 // Z_RET. Since native_entry will copy the jni-pointer to the 83 // first C-argument slot later on, it's OK to occupy this slot 84 // temporarily. Then we copy the argument list on the java 85 // expression stack into native varargs format on the native stack 86 // and load arguments into argument registers. Integer arguments in 87 // the varargs vector will be sign-extended to 8 bytes. 88 // 89 // On entry: 90 // Z_ARG1 - intptr_t* Address of java argument list in memory. 91 // Z_state - cppInterpreter* Address of interpreter state for 92 // this method 93 // Z_method 94 // 95 // On exit (just before return instruction): 96 // Z_RET contains the address of the result_handler. 97 // Z_ARG2 is not updated for static methods and contains "this" otherwise. 98 // Z_ARG3-Z_ARG5 contain the first 3 arguments of types other than float and double. 99 // Z_FARG1-Z_FARG4 contain the first 4 arguments of type float or double. 100 101 const int LogSizeOfCase = 3; 102 103 const int max_fp_register_arguments = Argument::n_float_register_parameters; 104 const int max_int_register_arguments = Argument::n_register_parameters - 2; // First 2 are reserved. 105 106 const Register arg_java = Z_tmp_2; 107 const Register arg_c = Z_tmp_3; 108 const Register signature = Z_R1_scratch; // Is a string. 109 const Register fpcnt = Z_R0_scratch; 110 const Register argcnt = Z_tmp_4; 111 const Register intSlot = Z_tmp_1; 112 const Register sig_end = Z_tmp_1; // Assumed end of signature (only used in do_object). 113 const Register target_sp = Z_tmp_1; 114 const FloatRegister floatSlot = Z_F1; 115 116 const int d_signature = _z_abi(gpr6); // Only spill space, register contents not affected. 117 const int d_fpcnt = _z_abi(gpr7); // Only spill space, register contents not affected. 118 119 unsigned int entry_offset = __ offset(); 120 121 BLOCK_COMMENT("slow_signature_handler {"); 122 123 // We use target_sp for storing arguments in the C frame. 124 __ save_return_pc(); 125 __ push_frame_abi160(4*BytesPerWord); // Reserve space to save the tmp_[1..4] registers. 126 __ z_stmg(Z_R10, Z_R13, frame::z_abi_160_size, Z_SP); // Save registers only after frame is pushed. 127 128 __ z_lgr(arg_java, Z_ARG1); 129 130 Register method = Z_ARG2; // Directly load into correct argument register. 131 132 __ get_method(method); 133 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::get_signature), Z_thread, method); 134 135 // Move signature to callee saved register. 136 // Don't directly write to stack. Frame is used by VM call. 137 __ z_lgr(Z_tmp_1, Z_RET); 138 139 // Reload method. Register may have been altered by VM call. 140 __ get_method(method); 141 142 // Get address of result handler. 143 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::get_result_handler), Z_thread, method); 144 145 // Save signature address to stack. 146 __ z_stg(Z_tmp_1, d_signature, Z_SP); 147 148 // Don't overwrite return value (Z_RET, Z_ARG1) in rest of the method ! 149 150 { 151 Label isStatic; 152 153 // Test if static. 154 // We can test the bit directly. 155 // Path is Z_method->_access_flags._flags. 156 // We only support flag bits in the least significant byte (assert !). 157 // Therefore add 3 to address that byte within "_flags". 158 // Reload method. VM call above may have destroyed register contents 159 __ get_method(method); 160 __ testbit(method2_(method, access_flags), JVM_ACC_STATIC_BIT); 161 method = noreg; // end of life 162 __ z_btrue(isStatic); 163 164 // For non-static functions, pass "this" in Z_ARG2 and copy it to 2nd C-arg slot. 165 // Need to box the Java object here, so we use arg_java 166 // (address of current Java stack slot) as argument and 167 // don't dereference it as in case of ints, floats, etc.. 168 __ z_lgr(Z_ARG2, arg_java); 169 __ add2reg(arg_java, -BytesPerWord); 170 __ bind(isStatic); 171 } 172 173 // argcnt == 0 corresponds to 3rd C argument. 174 // arg #1 (result handler) and 175 // arg #2 (this, for non-statics), unused else 176 // are reserved and pre-filled above. 177 // arg_java points to the corresponding Java argument here. It 178 // has been decremented by one argument (this) in case of non-static. 179 __ clear_reg(argcnt, true, false); // Don't set CC. 180 __ z_lg(target_sp, 0, Z_SP); 181 __ add2reg(arg_c, _z_abi(remaining_cargs), target_sp); 182 // No floating-point args parsed so far. 183 __ clear_mem(Address(Z_SP, d_fpcnt), 8); 184 185 NearLabel move_intSlot_to_ARG, move_floatSlot_to_FARG; 186 NearLabel loop_start, loop_start_restore, loop_end; 187 NearLabel do_int, do_long, do_float, do_double; 188 NearLabel do_dontreachhere, do_object, do_array, do_boxed; 189 190 #ifdef ASSERT 191 // Signature needs to point to '(' (== 0x28) at entry. 192 __ z_lg(signature, d_signature, Z_SP); 193 __ z_cli(0, signature, (int) '('); 194 __ z_brne(do_dontreachhere); 195 #endif 196 197 __ bind(loop_start_restore); 198 __ z_lg(signature, d_signature, Z_SP); // Restore signature ptr, destroyed by move_XX_to_ARG. 199 200 BIND(loop_start); 201 // Advance to next argument type token from the signature. 202 __ add2reg(signature, 1); 203 204 // Use CLI, works well on all CPU versions. 205 __ z_cli(0, signature, (int) ')'); 206 __ z_bre(loop_end); // end of signature 207 __ z_cli(0, signature, (int) 'L'); 208 __ z_bre(do_object); // object #9 209 __ z_cli(0, signature, (int) 'F'); 210 __ z_bre(do_float); // float #7 211 __ z_cli(0, signature, (int) 'J'); 212 __ z_bre(do_long); // long #6 213 __ z_cli(0, signature, (int) 'B'); 214 __ z_bre(do_int); // byte #1 215 __ z_cli(0, signature, (int) 'Z'); 216 __ z_bre(do_int); // boolean #2 217 __ z_cli(0, signature, (int) 'C'); 218 __ z_bre(do_int); // char #3 219 __ z_cli(0, signature, (int) 'S'); 220 __ z_bre(do_int); // short #4 221 __ z_cli(0, signature, (int) 'I'); 222 __ z_bre(do_int); // int #5 223 __ z_cli(0, signature, (int) 'D'); 224 __ z_bre(do_double); // double #8 225 __ z_cli(0, signature, (int) '['); 226 __ z_bre(do_array); // array #10 227 228 __ bind(do_dontreachhere); 229 230 __ unimplemented("ShouldNotReachHere in slow_signature_handler", 120); 231 232 // Array argument 233 BIND(do_array); 234 235 { 236 Label start_skip, end_skip; 237 238 __ bind(start_skip); 239 240 // Advance to next type tag from signature. 241 __ add2reg(signature, 1); 242 243 // Use CLI, works well on all CPU versions. 244 __ z_cli(0, signature, (int) '['); 245 __ z_bre(start_skip); // Skip further brackets. 246 247 __ z_cli(0, signature, (int) '9'); 248 __ z_brh(end_skip); // no optional size 249 250 __ z_cli(0, signature, (int) '0'); 251 __ z_brnl(start_skip); // Skip optional size. 252 253 __ bind(end_skip); 254 255 __ z_cli(0, signature, (int) 'L'); 256 __ z_brne(do_boxed); // If not array of objects: go directly to do_boxed. 257 } 258 259 // OOP argument 260 BIND(do_object); 261 // Pass by an object's type name. 262 { 263 Label L; 264 265 __ add2reg(sig_end, 4095, signature); // Assume object type name is shorter than 4k. 266 __ load_const_optimized(Z_R0, (int) ';'); // Type name terminator (must be in Z_R0!). 267 __ MacroAssembler::search_string(sig_end, signature); 268 __ z_brl(L); 269 __ z_illtrap(); // No semicolon found: internal error or object name too long. 270 __ bind(L); 271 __ z_lgr(signature, sig_end); 272 // fallthru to do_boxed 273 } 274 275 // Need to box the Java object here, so we use arg_java 276 // (address of current Java stack slot) as argument and 277 // don't dereference it as in case of ints, floats, etc.. 278 279 // UNBOX argument 280 // Load reference and check for NULL. 281 Label do_int_Entry4Boxed; 282 __ bind(do_boxed); 283 { 284 __ load_and_test_long(intSlot, Address(arg_java)); 285 __ z_bre(do_int_Entry4Boxed); 286 __ z_lgr(intSlot, arg_java); 287 __ z_bru(do_int_Entry4Boxed); 288 } 289 290 // INT argument 291 292 // (also for byte, boolean, char, short) 293 // Use lgf for load (sign-extend) and stg for store. 294 BIND(do_int); 295 __ z_lgf(intSlot, 0, arg_java); 296 297 __ bind(do_int_Entry4Boxed); 298 __ add2reg(arg_java, -BytesPerWord); 299 // If argument fits into argument register, go and handle it, otherwise continue. 300 __ compare32_and_branch(argcnt, max_int_register_arguments, 301 Assembler::bcondLow, move_intSlot_to_ARG); 302 __ z_stg(intSlot, 0, arg_c); 303 __ add2reg(arg_c, BytesPerWord); 304 __ z_bru(loop_start); 305 306 // LONG argument 307 308 BIND(do_long); 309 __ add2reg(arg_java, -2*BytesPerWord); // Decrement first to have positive displacement for lg. 310 __ z_lg(intSlot, BytesPerWord, arg_java); 311 // If argument fits into argument register, go and handle it, otherwise continue. 312 __ compare32_and_branch(argcnt, max_int_register_arguments, 313 Assembler::bcondLow, move_intSlot_to_ARG); 314 __ z_stg(intSlot, 0, arg_c); 315 __ add2reg(arg_c, BytesPerWord); 316 __ z_bru(loop_start); 317 318 // FLOAT argumen 319 320 BIND(do_float); 321 __ z_le(floatSlot, 0, arg_java); 322 __ add2reg(arg_java, -BytesPerWord); 323 assert(max_fp_register_arguments <= 255, "always true"); // safety net 324 __ z_cli(d_fpcnt+7, Z_SP, max_fp_register_arguments); 325 __ z_brl(move_floatSlot_to_FARG); 326 __ z_ste(floatSlot, 4, arg_c); 327 __ add2reg(arg_c, BytesPerWord); 328 __ z_bru(loop_start); 329 330 // DOUBLE argument 331 332 BIND(do_double); 333 __ add2reg(arg_java, -2*BytesPerWord); // Decrement first to have positive displacement for lg. 334 __ z_ld(floatSlot, BytesPerWord, arg_java); 335 assert(max_fp_register_arguments <= 255, "always true"); // safety net 336 __ z_cli(d_fpcnt+7, Z_SP, max_fp_register_arguments); 337 __ z_brl(move_floatSlot_to_FARG); 338 __ z_std(floatSlot, 0, arg_c); 339 __ add2reg(arg_c, BytesPerWord); 340 __ z_bru(loop_start); 341 342 // Method exit, all arguments proocessed. 343 __ bind(loop_end); 344 __ z_lmg(Z_R10, Z_R13, frame::z_abi_160_size, Z_SP); // restore registers before frame is popped. 345 __ pop_frame(); 346 __ restore_return_pc(); 347 __ z_br(Z_R14); 348 349 // Copy int arguments. 350 351 Label iarg_caselist; // Distance between each case has to be a power of 2 352 // (= 1 << LogSizeOfCase). 353 __ align(16); 354 BIND(iarg_caselist); 355 __ z_lgr(Z_ARG3, intSlot); // 4 bytes 356 __ z_bru(loop_start_restore); // 4 bytes 357 358 __ z_lgr(Z_ARG4, intSlot); 359 __ z_bru(loop_start_restore); 360 361 __ z_lgr(Z_ARG5, intSlot); 362 __ z_bru(loop_start_restore); 363 364 __ align(16); 365 __ bind(move_intSlot_to_ARG); 366 __ z_stg(signature, d_signature, Z_SP); // Spill since signature == Z_R1_scratch. 367 __ z_larl(Z_R1_scratch, iarg_caselist); 368 __ z_sllg(Z_R0_scratch, argcnt, LogSizeOfCase); 369 __ add2reg(argcnt, 1); 370 __ z_agr(Z_R1_scratch, Z_R0_scratch); 371 __ z_bcr(Assembler::bcondAlways, Z_R1_scratch); 372 373 // Copy float arguments. 374 375 Label farg_caselist; // Distance between each case has to be a power of 2 376 // (= 1 << logSizeOfCase, padded with nop. 377 __ align(16); 378 BIND(farg_caselist); 379 __ z_ldr(Z_FARG1, floatSlot); // 2 bytes 380 __ z_bru(loop_start_restore); // 4 bytes 381 __ z_nop(); // 2 bytes 382 383 __ z_ldr(Z_FARG2, floatSlot); 384 __ z_bru(loop_start_restore); 385 __ z_nop(); 386 387 __ z_ldr(Z_FARG3, floatSlot); 388 __ z_bru(loop_start_restore); 389 __ z_nop(); 390 391 __ z_ldr(Z_FARG4, floatSlot); 392 __ z_bru(loop_start_restore); 393 __ z_nop(); 394 395 __ align(16); 396 __ bind(move_floatSlot_to_FARG); 397 __ z_stg(signature, d_signature, Z_SP); // Spill since signature == Z_R1_scratch. 398 __ z_lg(Z_R0_scratch, d_fpcnt, Z_SP); // Need old value for indexing. 399 __ add2mem_64(Address(Z_SP, d_fpcnt), 1, Z_R1_scratch); // Increment index. 400 __ z_larl(Z_R1_scratch, farg_caselist); 401 __ z_sllg(Z_R0_scratch, Z_R0_scratch, LogSizeOfCase); 402 __ z_agr(Z_R1_scratch, Z_R0_scratch); 403 __ z_bcr(Assembler::bcondAlways, Z_R1_scratch); 404 405 BLOCK_COMMENT("} slow_signature_handler"); 406 407 return __ addr_at(entry_offset); 408 } 409 410 address TemplateInterpreterGenerator::generate_result_handler_for (BasicType type) { 411 address entry = __ pc(); 412 413 assert(Z_tos == Z_RET, "Result handler: must move result!"); 414 assert(Z_ftos == Z_FRET, "Result handler: must move float result!"); 415 416 switch (type) { 417 case T_BOOLEAN: 418 __ c2bool(Z_tos); 419 break; 420 case T_CHAR: 421 __ and_imm(Z_tos, 0xffff); 422 break; 423 case T_BYTE: 424 __ z_lbr(Z_tos, Z_tos); 425 break; 426 case T_SHORT: 427 __ z_lhr(Z_tos, Z_tos); 428 break; 429 case T_INT: 430 case T_LONG: 431 case T_VOID: 432 case T_FLOAT: 433 case T_DOUBLE: 434 break; 435 case T_OBJECT: 436 // Retrieve result from frame... 437 __ mem2reg_opt(Z_tos, Address(Z_fp, oop_tmp_offset)); 438 // and verify it. 439 __ verify_oop(Z_tos); 440 break; 441 default: 442 ShouldNotReachHere(); 443 } 444 __ z_br(Z_R14); // Return from result handler. 445 return entry; 446 } 447 448 // Abstract method entry. 449 // Attempt to execute abstract method. Throw exception. 450 address TemplateInterpreterGenerator::generate_abstract_entry(void) { 451 unsigned int entry_offset = __ offset(); 452 453 // Caller could be the call_stub or a compiled method (x86 version is wrong!). 454 455 BLOCK_COMMENT("abstract_entry {"); 456 457 // Implement call of InterpreterRuntime::throw_AbstractMethodError. 458 __ set_top_ijava_frame_at_SP_as_last_Java_frame(Z_SP, Z_R1); 459 __ save_return_pc(); // Save Z_R14. 460 __ push_frame_abi160(0); // Without new frame the RT call could overwrite the saved Z_R14. 461 462 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorWithMethod), 463 Z_thread, Z_method); 464 465 __ pop_frame(); 466 __ restore_return_pc(); // Restore Z_R14. 467 __ reset_last_Java_frame(); 468 469 // Restore caller sp for c2i case. 470 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. 471 472 // branch to SharedRuntime::generate_forward_exception() which handles all possible callers, 473 // i.e. call stub, compiled method, interpreted method. 474 __ load_absolute_address(Z_tmp_1, StubRoutines::forward_exception_entry()); 475 __ z_br(Z_tmp_1); 476 477 BLOCK_COMMENT("} abstract_entry"); 478 479 return __ addr_at(entry_offset); 480 } 481 482 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) { 483 // Inputs: 484 // Z_ARG1 - receiver 485 // 486 // What we do: 487 // - Load the referent field address. 488 // - Load the value in the referent field. 489 // - Pass that value to the pre-barrier. 490 // 491 // In the case of G1 this will record the value of the 492 // referent in an SATB buffer if marking is active. 493 // This will cause concurrent marking to mark the referent 494 // field as live. 495 496 Register scratch1 = Z_tmp_2; 497 Register scratch2 = Z_tmp_3; 498 Register pre_val = Z_RET; // return value 499 // Z_esp is callers operand stack pointer, i.e. it points to the parameters. 500 Register Rargp = Z_esp; 501 502 Label slow_path; 503 address entry = __ pc(); 504 505 const int referent_offset = java_lang_ref_Reference::referent_offset; 506 guarantee(referent_offset > 0, "referent offset not initialized"); 507 508 BLOCK_COMMENT("Reference_get {"); 509 510 // If the receiver is null then it is OK to jump to the slow path. 511 __ load_and_test_long(pre_val, Address(Rargp, Interpreter::stackElementSize)); // Get receiver. 512 __ z_bre(slow_path); 513 514 // Load the value of the referent field. 515 BarrierSetAssembler *bs = BarrierSet::barrier_set()->barrier_set_assembler(); 516 bs->load_at(_masm, IN_HEAP | ON_WEAK_OOP_REF, T_OBJECT, 517 Address(pre_val, referent_offset), pre_val, scratch1, scratch2); 518 519 // Restore caller sp for c2i case. 520 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. 521 __ z_br(Z_R14); 522 523 // Branch to previously generated regular method entry. 524 __ bind(slow_path); 525 526 address meth_entry = Interpreter::entry_for_kind(Interpreter::zerolocals); 527 __ jump_to_entry(meth_entry, Z_R1); 528 529 BLOCK_COMMENT("} Reference_get"); 530 531 return entry; 532 } 533 534 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { 535 address entry = __ pc(); 536 537 DEBUG_ONLY(__ verify_esp(Z_esp, Z_ARG5)); 538 539 // Restore bcp under the assumption that the current frame is still 540 // interpreted. 541 __ restore_bcp(); 542 543 // Expression stack must be empty before entering the VM if an 544 // exception happened. 545 __ empty_expression_stack(); 546 // Throw exception. 547 __ call_VM(noreg, 548 CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError)); 549 return entry; 550 } 551 552 // 553 // Args: 554 // Z_ARG3: aberrant index 555 // 556 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char * name) { 557 address entry = __ pc(); 558 address excp = CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException); 559 560 // Expression stack must be empty before entering the VM if an 561 // exception happened. 562 __ empty_expression_stack(); 563 564 // Setup parameters. 565 // Leave out the name and use register for array to create more detailed exceptions. 566 __ load_absolute_address(Z_ARG2, (address) name); 567 __ call_VM(noreg, excp, Z_ARG2, Z_ARG3); 568 return entry; 569 } 570 571 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { 572 address entry = __ pc(); 573 574 // Object is at TOS. 575 __ pop_ptr(Z_ARG2); 576 577 // Expression stack must be empty before entering the VM if an 578 // exception happened. 579 __ empty_expression_stack(); 580 581 __ call_VM(Z_ARG1, 582 CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ClassCastException), 583 Z_ARG2); 584 585 DEBUG_ONLY(__ should_not_reach_here();) 586 587 return entry; 588 } 589 590 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) { 591 assert(!pass_oop || message == NULL, "either oop or message but not both"); 592 address entry = __ pc(); 593 594 BLOCK_COMMENT("exception_handler_common {"); 595 596 // Expression stack must be empty before entering the VM if an 597 // exception happened. 598 __ empty_expression_stack(); 599 if (name != NULL) { 600 __ load_absolute_address(Z_ARG2, (address)name); 601 } else { 602 __ clear_reg(Z_ARG2, true, false); 603 } 604 605 if (pass_oop) { 606 __ call_VM(Z_tos, 607 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), 608 Z_ARG2, Z_tos /*object (see TT::aastore())*/); 609 } else { 610 if (message != NULL) { 611 __ load_absolute_address(Z_ARG3, (address)message); 612 } else { 613 __ clear_reg(Z_ARG3, true, false); 614 } 615 __ call_VM(Z_tos, 616 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), 617 Z_ARG2, Z_ARG3); 618 } 619 // Throw exception. 620 __ load_absolute_address(Z_R1_scratch, Interpreter::throw_exception_entry()); 621 __ z_br(Z_R1_scratch); 622 623 BLOCK_COMMENT("} exception_handler_common"); 624 625 return entry; 626 } 627 628 address TemplateInterpreterGenerator::generate_return_entry_for (TosState state, int step, size_t index_size) { 629 address entry = __ pc(); 630 631 BLOCK_COMMENT("return_entry {"); 632 633 // Pop i2c extension or revert top-2-parent-resize done by interpreted callees. 634 Register sp_before_i2c_extension = Z_bcp; 635 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer. 636 __ z_lg(sp_before_i2c_extension, Address(Z_fp, _z_ijava_state_neg(top_frame_sp))); 637 __ resize_frame_absolute(sp_before_i2c_extension, Z_locals/*tmp*/, true/*load_fp*/); 638 639 // TODO(ZASM): necessary?? 640 // // and NULL it as marker that esp is now tos until next java call 641 // __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 642 643 __ restore_bcp(); 644 __ restore_locals(); 645 __ restore_esp(); 646 647 if (state == atos) { 648 __ profile_return_type(Z_tmp_1, Z_tos, Z_tmp_2); 649 } 650 651 Register cache = Z_tmp_1; 652 Register size = Z_tmp_1; 653 Register offset = Z_tmp_2; 654 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() + 655 ConstantPoolCacheEntry::flags_offset()); 656 __ get_cache_and_index_at_bcp(cache, offset, 1, index_size); 657 658 // #args is in rightmost byte of the _flags field. 659 __ z_llgc(size, Address(cache, offset, flags_offset+(sizeof(size_t)-1))); 660 __ z_sllg(size, size, Interpreter::logStackElementSize); // Each argument size in bytes. 661 __ z_agr(Z_esp, size); // Pop arguments. 662 663 __ check_and_handle_popframe(Z_thread); 664 __ check_and_handle_earlyret(Z_thread); 665 666 __ dispatch_next(state, step); 667 668 BLOCK_COMMENT("} return_entry"); 669 670 return entry; 671 } 672 673 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, 674 int step, 675 address continuation) { 676 address entry = __ pc(); 677 678 BLOCK_COMMENT("deopt_entry {"); 679 680 // TODO(ZASM): necessary? NULL last_sp until next java call 681 // __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 682 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer. 683 __ restore_bcp(); 684 __ restore_locals(); 685 __ restore_esp(); 686 687 // Handle exceptions. 688 { 689 Label L; 690 __ load_and_test_long(Z_R0/*pending_exception*/, thread_(pending_exception)); 691 __ z_bre(L); 692 __ call_VM(noreg, 693 CAST_FROM_FN_PTR(address, 694 InterpreterRuntime::throw_pending_exception)); 695 __ should_not_reach_here(); 696 __ bind(L); 697 } 698 if (continuation == NULL) { 699 __ dispatch_next(state, step); 700 } else { 701 __ jump_to_entry(continuation, Z_R1_scratch); 702 } 703 704 BLOCK_COMMENT("} deopt_entry"); 705 706 return entry; 707 } 708 709 address TemplateInterpreterGenerator::generate_safept_entry_for (TosState state, 710 address runtime_entry) { 711 address entry = __ pc(); 712 __ push(state); 713 __ call_VM(noreg, runtime_entry); 714 __ dispatch_via(vtos, Interpreter::_normal_table.table_for (vtos)); 715 return entry; 716 } 717 718 // 719 // Helpers for commoning out cases in the various type of method entries. 720 // 721 722 // Increment invocation count & check for overflow. 723 // 724 // Note: checking for negative value instead of overflow 725 // so we have a 'sticky' overflow test. 726 // 727 // Z_ARG2: method (see generate_fixed_frame()) 728 // 729 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) { 730 Label done; 731 Register method = Z_ARG2; // Generate_fixed_frame() copies Z_method into Z_ARG2. 732 Register m_counters = Z_ARG4; 733 734 BLOCK_COMMENT("counter_incr {"); 735 736 // Note: In tiered we increment either counters in method or in MDO depending 737 // if we are profiling or not. 738 if (TieredCompilation) { 739 int increment = InvocationCounter::count_increment; 740 if (ProfileInterpreter) { 741 NearLabel no_mdo; 742 Register mdo = m_counters; 743 // Are we profiling? 744 __ load_and_test_long(mdo, method2_(method, method_data)); 745 __ branch_optimized(Assembler::bcondZero, no_mdo); 746 // Increment counter in the MDO. 747 const Address mdo_invocation_counter(mdo, MethodData::invocation_counter_offset() + 748 InvocationCounter::counter_offset()); 749 const Address mask(mdo, MethodData::invoke_mask_offset()); 750 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, 751 Z_R1_scratch, false, Assembler::bcondZero, 752 overflow); 753 __ z_bru(done); 754 __ bind(no_mdo); 755 } 756 757 // Increment counter in MethodCounters. 758 const Address invocation_counter(m_counters, 759 MethodCounters::invocation_counter_offset() + 760 InvocationCounter::counter_offset()); 761 // Get address of MethodCounters object. 762 __ get_method_counters(method, m_counters, done); 763 const Address mask(m_counters, MethodCounters::invoke_mask_offset()); 764 __ increment_mask_and_jump(invocation_counter, 765 increment, mask, 766 Z_R1_scratch, false, Assembler::bcondZero, 767 overflow); 768 } else { 769 Register counter_sum = Z_ARG3; // The result of this piece of code. 770 Register tmp = Z_R1_scratch; 771 #ifdef ASSERT 772 { 773 NearLabel ok; 774 __ get_method(tmp); 775 __ compare64_and_branch(method, tmp, Assembler::bcondEqual, ok); 776 __ z_illtrap(0x66); 777 __ bind(ok); 778 } 779 #endif 780 781 // Get address of MethodCounters object. 782 __ get_method_counters(method, m_counters, done); 783 // Update standard invocation counters. 784 __ increment_invocation_counter(m_counters, counter_sum); 785 if (ProfileInterpreter) { 786 __ add2mem_32(Address(m_counters, MethodCounters::interpreter_invocation_counter_offset()), 1, tmp); 787 if (profile_method != NULL) { 788 const Address profile_limit(m_counters, MethodCounters::interpreter_profile_limit_offset()); 789 __ z_cl(counter_sum, profile_limit); 790 __ branch_optimized(Assembler::bcondLow, *profile_method_continue); 791 // If no method data exists, go to profile_method. 792 __ test_method_data_pointer(tmp, *profile_method); 793 } 794 } 795 796 const Address invocation_limit(m_counters, MethodCounters::interpreter_invocation_limit_offset()); 797 __ z_cl(counter_sum, invocation_limit); 798 __ branch_optimized(Assembler::bcondNotLow, *overflow); 799 } 800 801 __ bind(done); 802 803 BLOCK_COMMENT("} counter_incr"); 804 } 805 806 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) { 807 // InterpreterRuntime::frequency_counter_overflow takes two 808 // arguments, the first (thread) is passed by call_VM, the second 809 // indicates if the counter overflow occurs at a backwards branch 810 // (NULL bcp). We pass zero for it. The call returns the address 811 // of the verified entry point for the method or NULL if the 812 // compilation did not complete (either went background or bailed 813 // out). 814 __ clear_reg(Z_ARG2); 815 __ call_VM(noreg, 816 CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), 817 Z_ARG2); 818 __ z_bru(do_continue); 819 } 820 821 void TemplateInterpreterGenerator::generate_stack_overflow_check(Register frame_size, Register tmp1) { 822 Register tmp2 = Z_R1_scratch; 823 const int page_size = os::vm_page_size(); 824 NearLabel after_frame_check; 825 826 BLOCK_COMMENT("counter_overflow {"); 827 828 assert_different_registers(frame_size, tmp1); 829 830 // Stack banging is sufficient overflow check if frame_size < page_size. 831 if (Immediate::is_uimm(page_size, 15)) { 832 __ z_chi(frame_size, page_size); 833 __ z_brl(after_frame_check); 834 } else { 835 __ load_const_optimized(tmp1, page_size); 836 __ compareU32_and_branch(frame_size, tmp1, Assembler::bcondLow, after_frame_check); 837 } 838 839 // Get the stack base, and in debug, verify it is non-zero. 840 __ z_lg(tmp1, thread_(stack_base)); 841 #ifdef ASSERT 842 address reentry = NULL; 843 NearLabel base_not_zero; 844 __ compareU64_and_branch(tmp1, (intptr_t)0L, Assembler::bcondNotEqual, base_not_zero); 845 reentry = __ stop_chain_static(reentry, "stack base is zero in generate_stack_overflow_check"); 846 __ bind(base_not_zero); 847 #endif 848 849 // Get the stack size, and in debug, verify it is non-zero. 850 assert(sizeof(size_t) == sizeof(intptr_t), "wrong load size"); 851 __ z_lg(tmp2, thread_(stack_size)); 852 #ifdef ASSERT 853 NearLabel size_not_zero; 854 __ compareU64_and_branch(tmp2, (intptr_t)0L, Assembler::bcondNotEqual, size_not_zero); 855 reentry = __ stop_chain_static(reentry, "stack size is zero in generate_stack_overflow_check"); 856 __ bind(size_not_zero); 857 #endif 858 859 // Compute the beginning of the protected zone minus the requested frame size. 860 __ z_sgr(tmp1, tmp2); 861 __ add2reg(tmp1, JavaThread::stack_guard_zone_size()); 862 863 // Add in the size of the frame (which is the same as subtracting it from the 864 // SP, which would take another register. 865 __ z_agr(tmp1, frame_size); 866 867 // The frame is greater than one page in size, so check against 868 // the bottom of the stack. 869 __ compareU64_and_branch(Z_SP, tmp1, Assembler::bcondHigh, after_frame_check); 870 871 // The stack will overflow, throw an exception. 872 873 // Restore SP to sender's sp. This is necessary if the sender's frame is an 874 // extended compiled frame (see gen_c2i_adapter()) and safer anyway in case of 875 // JSR292 adaptations. 876 __ resize_frame_absolute(Z_R10, tmp1, true/*load_fp*/); 877 878 // Note also that the restored frame is not necessarily interpreted. 879 // Use the shared runtime version of the StackOverflowError. 880 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated"); 881 AddressLiteral stub(StubRoutines::throw_StackOverflowError_entry()); 882 __ load_absolute_address(tmp1, StubRoutines::throw_StackOverflowError_entry()); 883 __ z_br(tmp1); 884 885 // If you get to here, then there is enough stack space. 886 __ bind(after_frame_check); 887 888 BLOCK_COMMENT("} counter_overflow"); 889 } 890 891 // Allocate monitor and lock method (asm interpreter). 892 // 893 // Args: 894 // Z_locals: locals 895 896 void TemplateInterpreterGenerator::lock_method(void) { 897 898 BLOCK_COMMENT("lock_method {"); 899 900 // Synchronize method. 901 const Register method = Z_tmp_2; 902 __ get_method(method); 903 904 #ifdef ASSERT 905 address reentry = NULL; 906 { 907 Label L; 908 __ testbit(method2_(method, access_flags), JVM_ACC_SYNCHRONIZED_BIT); 909 __ z_btrue(L); 910 reentry = __ stop_chain_static(reentry, "method doesn't need synchronization"); 911 __ bind(L); 912 } 913 #endif // ASSERT 914 915 // Get synchronization object. 916 const Register object = Z_tmp_2; 917 918 { 919 Label done; 920 Label static_method; 921 922 __ testbit(method2_(method, access_flags), JVM_ACC_STATIC_BIT); 923 __ z_btrue(static_method); 924 925 // non-static method: Load receiver obj from stack. 926 __ mem2reg_opt(object, Address(Z_locals, Interpreter::local_offset_in_bytes(0))); 927 __ z_bru(done); 928 929 __ bind(static_method); 930 931 // Lock the java mirror. 932 __ load_mirror(object, method); 933 #ifdef ASSERT 934 { 935 NearLabel L; 936 __ compare64_and_branch(object, (intptr_t) 0, Assembler::bcondNotEqual, L); 937 reentry = __ stop_chain_static(reentry, "synchronization object is NULL"); 938 __ bind(L); 939 } 940 #endif // ASSERT 941 942 __ bind(done); 943 } 944 945 __ add_monitor_to_stack(true, Z_ARG3, Z_ARG4, Z_ARG5); // Allocate monitor elem. 946 // Store object and lock it. 947 __ get_monitors(Z_tmp_1); 948 __ reg2mem_opt(object, Address(Z_tmp_1, BasicObjectLock::obj_offset_in_bytes())); 949 __ lock_object(Z_tmp_1, object); 950 951 BLOCK_COMMENT("} lock_method"); 952 } 953 954 // Generate a fixed interpreter frame. This is identical setup for 955 // interpreted methods and for native methods hence the shared code. 956 // 957 // Registers alive 958 // Z_thread - JavaThread* 959 // Z_SP - old stack pointer 960 // Z_method - callee's method 961 // Z_esp - parameter list (slot 'above' last param) 962 // Z_R14 - return pc, to be stored in caller's frame 963 // Z_R10 - sender sp, note: Z_tmp_1 is Z_R10! 964 // 965 // Registers updated 966 // Z_SP - new stack pointer 967 // Z_esp - callee's operand stack pointer 968 // points to the slot above the value on top 969 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord) 970 // Z_bcp - the bytecode pointer 971 // Z_fp - the frame pointer, thereby killing Z_method 972 // Z_ARG2 - copy of Z_method 973 // 974 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { 975 976 // stack layout 977 // 978 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (see note below) 979 // [F1's operand stack (unused)] 980 // [F1's outgoing Java arguments] <-- Z_esp 981 // [F1's operand stack (non args)] 982 // [monitors] (optional) 983 // [IJAVA_STATE] 984 // 985 // F2 [PARENT_IJAVA_FRAME_ABI] 986 // ... 987 // 988 // 0x000 989 // 990 // Note: Z_R10, the sender sp, will be below Z_SP if F1 was extended by a c2i adapter. 991 992 //============================================================================= 993 // Allocate space for locals other than the parameters, the 994 // interpreter state, monitors, and the expression stack. 995 996 const Register local_count = Z_ARG5; 997 const Register fp = Z_tmp_2; 998 999 BLOCK_COMMENT("generate_fixed_frame {"); 1000 1001 { 1002 // local registers 1003 const Register top_frame_size = Z_ARG2; 1004 const Register sp_after_resize = Z_ARG3; 1005 const Register max_stack = Z_ARG4; 1006 1007 // local_count = method->constMethod->max_locals(); 1008 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset())); 1009 __ z_llgh(local_count, Address(Z_R1_scratch, ConstMethod::size_of_locals_offset())); 1010 1011 if (native_call) { 1012 // If we're calling a native method, we replace max_stack (which is 1013 // zero) with space for the worst-case signature handler varargs 1014 // vector, which is: 1015 // max_stack = max(Argument::n_register_parameters, parameter_count+2); 1016 // 1017 // We add two slots to the parameter_count, one for the jni 1018 // environment and one for a possible native mirror. We allocate 1019 // space for at least the number of ABI registers, even though 1020 // InterpreterRuntime::slow_signature_handler won't write more than 1021 // parameter_count+2 words when it creates the varargs vector at the 1022 // top of the stack. The generated slow signature handler will just 1023 // load trash into registers beyond the necessary number. We're 1024 // still going to cut the stack back by the ABI register parameter 1025 // count so as to get SP+16 pointing at the ABI outgoing parameter 1026 // area, so we need to allocate at least that much even though we're 1027 // going to throw it away. 1028 // 1029 1030 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset())); 1031 __ z_llgh(max_stack, Address(Z_R1_scratch, ConstMethod::size_of_parameters_offset())); 1032 __ add2reg(max_stack, 2); 1033 1034 NearLabel passing_args_on_stack; 1035 1036 // max_stack in bytes 1037 __ z_sllg(max_stack, max_stack, LogBytesPerWord); 1038 1039 int argument_registers_in_bytes = Argument::n_register_parameters << LogBytesPerWord; 1040 __ compare64_and_branch(max_stack, argument_registers_in_bytes, Assembler::bcondNotLow, passing_args_on_stack); 1041 1042 __ load_const_optimized(max_stack, argument_registers_in_bytes); 1043 1044 __ bind(passing_args_on_stack); 1045 } else { 1046 // !native_call 1047 __ z_lg(max_stack, method_(const)); 1048 1049 // Calculate number of non-parameter locals (in slots): 1050 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset())); 1051 __ z_sh(local_count, Address(Z_R1_scratch, ConstMethod::size_of_parameters_offset())); 1052 1053 // max_stack = method->max_stack(); 1054 __ z_llgh(max_stack, Address(max_stack, ConstMethod::max_stack_offset())); 1055 // max_stack in bytes 1056 __ z_sllg(max_stack, max_stack, LogBytesPerWord); 1057 } 1058 1059 // Resize (i.e. normally shrink) the top frame F1 ... 1060 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 1061 // F1's operand stack (free) 1062 // ... 1063 // F1's operand stack (free) <-- Z_esp 1064 // F1's outgoing Java arg m 1065 // ... 1066 // F1's outgoing Java arg 0 1067 // ... 1068 // 1069 // ... into a parent frame (Z_R10 holds F1's SP before any modification, see also above) 1070 // 1071 // +......................+ 1072 // : : <-- Z_R10, saved below as F0's z_ijava_state.sender_sp 1073 // : : 1074 // F1 [PARENT_IJAVA_FRAME_ABI] <-- Z_SP \ 1075 // F0's non arg local | = delta 1076 // ... | 1077 // F0's non arg local <-- Z_esp / 1078 // F1's outgoing Java arg m 1079 // ... 1080 // F1's outgoing Java arg 0 1081 // ... 1082 // 1083 // then push the new top frame F0. 1084 // 1085 // F0 [TOP_IJAVA_FRAME_ABI] = frame::z_top_ijava_frame_abi_size \ 1086 // [operand stack] = max_stack | = top_frame_size 1087 // [IJAVA_STATE] = frame::z_ijava_state_size / 1088 1089 // sp_after_resize = Z_esp - delta 1090 // 1091 // delta = PARENT_IJAVA_FRAME_ABI + (locals_count - params_count) 1092 1093 __ add2reg(sp_after_resize, (Interpreter::stackElementSize) - (frame::z_parent_ijava_frame_abi_size), Z_esp); 1094 __ z_sllg(Z_R0_scratch, local_count, LogBytesPerWord); // Params have already been subtracted from local_count. 1095 __ z_slgr(sp_after_resize, Z_R0_scratch); 1096 1097 // top_frame_size = TOP_IJAVA_FRAME_ABI + max_stack + size of interpreter state 1098 __ add2reg(top_frame_size, 1099 frame::z_top_ijava_frame_abi_size + 1100 frame::z_ijava_state_size + 1101 frame::interpreter_frame_monitor_size() * wordSize, 1102 max_stack); 1103 1104 if (!native_call) { 1105 // Stack overflow check. 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 Register frame_size = max_stack; // Reuse the regiser for max_stack. 1110 __ z_lgr(frame_size, Z_SP); 1111 __ z_sgr(frame_size, sp_after_resize); 1112 __ z_agr(frame_size, top_frame_size); 1113 generate_stack_overflow_check(frame_size, fp/*tmp1*/); 1114 } 1115 1116 DEBUG_ONLY(__ z_cg(Z_R14, _z_abi16(return_pc), Z_SP)); 1117 __ asm_assert_eq("killed Z_R14", 0); 1118 __ resize_frame_absolute(sp_after_resize, fp, true); 1119 __ save_return_pc(Z_R14); 1120 1121 // ... and push the new frame F0. 1122 __ push_frame(top_frame_size, fp, true /*copy_sp*/, false); 1123 } 1124 1125 //============================================================================= 1126 // Initialize the new frame F0: initialize interpreter state. 1127 1128 { 1129 // locals 1130 const Register local_addr = Z_ARG4; 1131 1132 BLOCK_COMMENT("generate_fixed_frame: initialize interpreter state {"); 1133 1134 #ifdef ASSERT 1135 // Set the magic number (using local_addr as tmp register). 1136 __ load_const_optimized(local_addr, frame::z_istate_magic_number); 1137 __ z_stg(local_addr, _z_ijava_state_neg(magic), fp); 1138 #endif 1139 1140 // Save sender SP from F1 (i.e. before it was potentially modified by an 1141 // adapter) into F0's interpreter state. We us it as well to revert 1142 // resizing the frame above. 1143 __ z_stg(Z_R10, _z_ijava_state_neg(sender_sp), fp); 1144 1145 // Load cp cache and save it at the and of this block. 1146 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset())); 1147 __ z_lg(Z_R1_scratch, Address(Z_R1_scratch, ConstMethod::constants_offset())); 1148 __ z_lg(Z_R1_scratch, Address(Z_R1_scratch, ConstantPool::cache_offset_in_bytes())); 1149 1150 // z_ijava_state->method = method; 1151 __ z_stg(Z_method, _z_ijava_state_neg(method), fp); 1152 1153 // Point locals at the first argument. Method's locals are the 1154 // parameters on top of caller's expression stack. 1155 // Tos points past last Java argument. 1156 1157 __ z_lg(Z_locals, Address(Z_method, Method::const_offset())); 1158 __ z_llgh(Z_locals /*parameter_count words*/, 1159 Address(Z_locals, ConstMethod::size_of_parameters_offset())); 1160 __ z_sllg(Z_locals /*parameter_count bytes*/, Z_locals /*parameter_count*/, LogBytesPerWord); 1161 __ z_agr(Z_locals, Z_esp); 1162 // z_ijava_state->locals - i*BytesPerWord points to i-th Java local (i starts at 0) 1163 // z_ijava_state->locals = Z_esp + parameter_count bytes 1164 __ z_stg(Z_locals, _z_ijava_state_neg(locals), fp); 1165 1166 // z_ijava_state->oop_temp = NULL; 1167 __ store_const(Address(fp, oop_tmp_offset), 0); 1168 1169 // Initialize z_ijava_state->mdx. 1170 Register Rmdp = Z_bcp; 1171 // native_call: assert that mdo == NULL 1172 const bool check_for_mdo = !native_call DEBUG_ONLY(|| native_call); 1173 if (ProfileInterpreter && check_for_mdo) { 1174 Label get_continue; 1175 1176 __ load_and_test_long(Rmdp, method_(method_data)); 1177 __ z_brz(get_continue); 1178 DEBUG_ONLY(if (native_call) __ stop("native methods don't have a mdo")); 1179 __ add2reg(Rmdp, in_bytes(MethodData::data_offset())); 1180 __ bind(get_continue); 1181 } 1182 __ z_stg(Rmdp, _z_ijava_state_neg(mdx), fp); 1183 1184 // Initialize z_ijava_state->bcp and Z_bcp. 1185 if (native_call) { 1186 __ clear_reg(Z_bcp); // Must initialize. Will get written into frame where GC reads it. 1187 } else { 1188 __ z_lg(Z_bcp, method_(const)); 1189 __ add2reg(Z_bcp, in_bytes(ConstMethod::codes_offset())); 1190 } 1191 __ z_stg(Z_bcp, _z_ijava_state_neg(bcp), fp); 1192 1193 // no monitors and empty operand stack 1194 // => z_ijava_state->monitors points to the top slot in IJAVA_STATE. 1195 // => Z_ijava_state->esp points one slot above into the operand stack. 1196 // z_ijava_state->monitors = fp - frame::z_ijava_state_size - Interpreter::stackElementSize; 1197 // z_ijava_state->esp = Z_esp = z_ijava_state->monitors; 1198 __ add2reg(Z_esp, -frame::z_ijava_state_size, fp); 1199 __ z_stg(Z_esp, _z_ijava_state_neg(monitors), fp); 1200 __ add2reg(Z_esp, -Interpreter::stackElementSize); 1201 __ z_stg(Z_esp, _z_ijava_state_neg(esp), fp); 1202 1203 // z_ijava_state->cpoolCache = Z_R1_scratch (see load above); 1204 __ z_stg(Z_R1_scratch, _z_ijava_state_neg(cpoolCache), fp); 1205 1206 // Get mirror and store it in the frame as GC root for this Method*. 1207 __ load_mirror(Z_R1_scratch, Z_method); 1208 __ z_stg(Z_R1_scratch, _z_ijava_state_neg(mirror), fp); 1209 1210 BLOCK_COMMENT("} generate_fixed_frame: initialize interpreter state"); 1211 1212 //============================================================================= 1213 if (!native_call) { 1214 // Fill locals with 0x0s. 1215 NearLabel locals_zeroed; 1216 NearLabel doXC; 1217 1218 // Local_count is already num_locals_slots - num_param_slots. 1219 __ compare64_and_branch(local_count, (intptr_t)0L, Assembler::bcondNotHigh, locals_zeroed); 1220 1221 // Advance local_addr to point behind locals (creates positive incr. in loop). 1222 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset())); 1223 __ z_llgh(Z_R0_scratch, Address(Z_R1_scratch, ConstMethod::size_of_locals_offset())); 1224 __ add2reg(Z_R0_scratch, -1); 1225 1226 __ z_lgr(local_addr/*locals*/, Z_locals); 1227 __ z_sllg(Z_R0_scratch, Z_R0_scratch, LogBytesPerWord); 1228 __ z_sllg(local_count, local_count, LogBytesPerWord); // Local_count are non param locals. 1229 __ z_sgr(local_addr, Z_R0_scratch); 1230 1231 if (VM_Version::has_Prefetch()) { 1232 __ z_pfd(0x02, 0, Z_R0, local_addr); 1233 __ z_pfd(0x02, 256, Z_R0, local_addr); 1234 } 1235 1236 // Can't optimise for Z10 using "compare and branch" (immediate value is too big). 1237 __ z_cghi(local_count, 256); 1238 __ z_brnh(doXC); 1239 1240 // MVCLE: Initialize if quite a lot locals. 1241 // __ bind(doMVCLE); 1242 __ z_lgr(Z_R0_scratch, local_addr); 1243 __ z_lgr(Z_R1_scratch, local_count); 1244 __ clear_reg(Z_ARG2); // Src len of MVCLE is zero. 1245 1246 __ MacroAssembler::move_long_ext(Z_R0_scratch, Z_ARG1, 0); 1247 __ z_bru(locals_zeroed); 1248 1249 Label XC_template; 1250 __ bind(XC_template); 1251 __ z_xc(0, 0, local_addr, 0, local_addr); 1252 1253 __ bind(doXC); 1254 __ z_bctgr(local_count, Z_R0); // Get #bytes-1 for EXECUTE. 1255 if (VM_Version::has_ExecuteExtensions()) { 1256 __ z_exrl(local_count, XC_template); // Execute XC with variable length. 1257 } else { 1258 __ z_larl(Z_R1_scratch, XC_template); 1259 __ z_ex(local_count, 0, Z_R0, Z_R1_scratch); // Execute XC with variable length. 1260 } 1261 1262 __ bind(locals_zeroed); 1263 } 1264 1265 } 1266 // Finally set the frame pointer, destroying Z_method. 1267 assert(Z_fp == Z_method, "maybe set Z_fp earlier if other register than Z_method"); 1268 // Oprofile analysis suggests to keep a copy in a register to be used by 1269 // generate_counter_incr(). 1270 __ z_lgr(Z_ARG2, Z_method); 1271 __ z_lgr(Z_fp, fp); 1272 1273 BLOCK_COMMENT("} generate_fixed_frame"); 1274 } 1275 1276 // Various method entries 1277 1278 // Math function, frame manager must set up an interpreter state, etc. 1279 address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) { 1280 1281 // Decide what to do: Use same platform specific instructions and runtime calls as compilers. 1282 bool use_instruction = false; 1283 address runtime_entry = NULL; 1284 int num_args = 1; 1285 bool double_precision = true; 1286 1287 // s390 specific: 1288 switch (kind) { 1289 case Interpreter::java_lang_math_sqrt: 1290 case Interpreter::java_lang_math_abs: use_instruction = true; break; 1291 case Interpreter::java_lang_math_fmaF: 1292 case Interpreter::java_lang_math_fmaD: use_instruction = UseFMA; break; 1293 default: break; // Fall back to runtime call. 1294 } 1295 1296 switch (kind) { 1297 case Interpreter::java_lang_math_sin : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsin); break; 1298 case Interpreter::java_lang_math_cos : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dcos); break; 1299 case Interpreter::java_lang_math_tan : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dtan); break; 1300 case Interpreter::java_lang_math_abs : /* run interpreted */ break; 1301 case Interpreter::java_lang_math_sqrt : /* runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsqrt); not available */ break; 1302 case Interpreter::java_lang_math_log : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog); break; 1303 case Interpreter::java_lang_math_log10: runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10); break; 1304 case Interpreter::java_lang_math_pow : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dpow); num_args = 2; break; 1305 case Interpreter::java_lang_math_exp : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dexp); break; 1306 case Interpreter::java_lang_math_fmaF : /* run interpreted */ num_args = 3; double_precision = false; break; 1307 case Interpreter::java_lang_math_fmaD : /* run interpreted */ num_args = 3; break; 1308 default: ShouldNotReachHere(); 1309 } 1310 1311 // Use normal entry if neither instruction nor runtime call is used. 1312 if (!use_instruction && runtime_entry == NULL) return NULL; 1313 1314 address entry = __ pc(); 1315 1316 if (use_instruction) { 1317 switch (kind) { 1318 case Interpreter::java_lang_math_sqrt: 1319 // Can use memory operand directly. 1320 __ z_sqdb(Z_FRET, Interpreter::stackElementSize, Z_esp); 1321 break; 1322 case Interpreter::java_lang_math_abs: 1323 // Load operand from stack. 1324 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); 1325 __ z_lpdbr(Z_FRET); 1326 break; 1327 case Interpreter::java_lang_math_fmaF: 1328 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); // result reg = arg3 1329 __ mem2freg_opt(Z_FARG2, Address(Z_esp, 3 * Interpreter::stackElementSize)); // arg1 1330 __ z_maeb(Z_FRET, Z_FARG2, Address(Z_esp, 2 * Interpreter::stackElementSize)); 1331 break; 1332 case Interpreter::java_lang_math_fmaD: 1333 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); // result reg = arg3 1334 __ mem2freg_opt(Z_FARG2, Address(Z_esp, 5 * Interpreter::stackElementSize)); // arg1 1335 __ z_madb(Z_FRET, Z_FARG2, Address(Z_esp, 3 * Interpreter::stackElementSize)); 1336 break; 1337 default: ShouldNotReachHere(); 1338 } 1339 } else { 1340 // Load arguments 1341 assert(num_args <= 4, "passed in registers"); 1342 if (double_precision) { 1343 int offset = (2 * num_args - 1) * Interpreter::stackElementSize; 1344 for (int i = 0; i < num_args; ++i) { 1345 __ mem2freg_opt(as_FloatRegister(Z_FARG1->encoding() + 2 * i), Address(Z_esp, offset)); 1346 offset -= 2 * Interpreter::stackElementSize; 1347 } 1348 } else { 1349 int offset = num_args * Interpreter::stackElementSize; 1350 for (int i = 0; i < num_args; ++i) { 1351 __ mem2freg_opt(as_FloatRegister(Z_FARG1->encoding() + 2 * i), Address(Z_esp, offset)); 1352 offset -= Interpreter::stackElementSize; 1353 } 1354 } 1355 // Call runtime 1356 __ save_return_pc(); // Save Z_R14. 1357 __ push_frame_abi160(0); // Without new frame the RT call could overwrite the saved Z_R14. 1358 1359 __ call_VM_leaf(runtime_entry); 1360 1361 __ pop_frame(); 1362 __ restore_return_pc(); // Restore Z_R14. 1363 } 1364 1365 // Pop c2i arguments (if any) off when we return. 1366 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. 1367 1368 __ z_br(Z_R14); 1369 1370 return entry; 1371 } 1372 1373 // Interpreter stub for calling a native method. (asm interpreter). 1374 // This sets up a somewhat different looking stack for calling the 1375 // native method than the typical interpreter frame setup. 1376 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) { 1377 // Determine code generation flags. 1378 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 1379 1380 // Interpreter entry for ordinary Java methods. 1381 // 1382 // Registers alive 1383 // Z_SP - stack pointer 1384 // Z_thread - JavaThread* 1385 // Z_method - callee's method (method to be invoked) 1386 // Z_esp - operand (or expression) stack pointer of caller. one slot above last arg. 1387 // Z_R10 - sender sp (before modifications, e.g. by c2i adapter 1388 // and as well by generate_fixed_frame below) 1389 // Z_R14 - return address to caller (call_stub or c2i_adapter) 1390 // 1391 // Registers updated 1392 // Z_SP - stack pointer 1393 // Z_fp - callee's framepointer 1394 // Z_esp - callee's operand stack pointer 1395 // points to the slot above the value on top 1396 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord) 1397 // Z_tos - integer result, if any 1398 // z_ftos - floating point result, if any 1399 // 1400 // Stack layout at this point: 1401 // 1402 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (Z_R10 will be below Z_SP if 1403 // frame was extended by c2i adapter) 1404 // [outgoing Java arguments] <-- Z_esp 1405 // ... 1406 // PARENT [PARENT_IJAVA_FRAME_ABI] 1407 // ... 1408 // 1409 1410 address entry_point = __ pc(); 1411 1412 // Make sure registers are different! 1413 assert_different_registers(Z_thread, Z_method, Z_esp); 1414 1415 BLOCK_COMMENT("native_entry {"); 1416 1417 // Make sure method is native and not abstract. 1418 #ifdef ASSERT 1419 address reentry = NULL; 1420 { Label L; 1421 __ testbit(method_(access_flags), JVM_ACC_NATIVE_BIT); 1422 __ z_btrue(L); 1423 reentry = __ stop_chain_static(reentry, "tried to execute non-native method as native"); 1424 __ bind(L); 1425 } 1426 { Label L; 1427 __ testbit(method_(access_flags), JVM_ACC_ABSTRACT_BIT); 1428 __ z_bfalse(L); 1429 reentry = __ stop_chain_static(reentry, "tried to execute abstract method as non-abstract"); 1430 __ bind(L); 1431 } 1432 #endif // ASSERT 1433 1434 #ifdef ASSERT 1435 // Save the return PC into the callers frame for assertion in generate_fixed_frame. 1436 __ save_return_pc(Z_R14); 1437 #endif 1438 1439 // Generate the code to allocate the interpreter stack frame. 1440 generate_fixed_frame(true); 1441 1442 const Address do_not_unlock_if_synchronized(Z_thread, JavaThread::do_not_unlock_if_synchronized_offset()); 1443 // Since at this point in the method invocation the exception handler 1444 // would try to exit the monitor of synchronized methods which hasn't 1445 // been entered yet, we set the thread local variable 1446 // _do_not_unlock_if_synchronized to true. If any exception was thrown by 1447 // runtime, exception handling i.e. unlock_if_synchronized_method will 1448 // check this thread local flag. 1449 __ z_mvi(do_not_unlock_if_synchronized, true); 1450 1451 // Increment invocation count and check for overflow. 1452 NearLabel invocation_counter_overflow; 1453 if (inc_counter) { 1454 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); 1455 } 1456 1457 Label continue_after_compile; 1458 __ bind(continue_after_compile); 1459 1460 bang_stack_shadow_pages(true); 1461 1462 // Reset the _do_not_unlock_if_synchronized flag. 1463 __ z_mvi(do_not_unlock_if_synchronized, false); 1464 1465 // Check for synchronized methods. 1466 // This mst happen AFTER invocation_counter check and stack overflow check, 1467 // so method is not locked if overflows. 1468 if (synchronized) { 1469 lock_method(); 1470 } else { 1471 // No synchronization necessary. 1472 #ifdef ASSERT 1473 { Label L; 1474 __ get_method(Z_R1_scratch); 1475 __ testbit(method2_(Z_R1_scratch, access_flags), JVM_ACC_SYNCHRONIZED_BIT); 1476 __ z_bfalse(L); 1477 reentry = __ stop_chain_static(reentry, "method needs synchronization"); 1478 __ bind(L); 1479 } 1480 #endif // ASSERT 1481 } 1482 1483 // start execution 1484 1485 // jvmti support 1486 __ notify_method_entry(); 1487 1488 //============================================================================= 1489 // Get and call the signature handler. 1490 const Register Rmethod = Z_tmp_2; 1491 const Register signature_handler_entry = Z_tmp_1; 1492 const Register Rresult_handler = Z_tmp_3; 1493 Label call_signature_handler; 1494 1495 assert_different_registers(Z_fp, Rmethod, signature_handler_entry, Rresult_handler); 1496 assert(Rresult_handler->is_nonvolatile(), "Rresult_handler must be in a non-volatile register"); 1497 1498 // Reload method. 1499 __ get_method(Rmethod); 1500 1501 // Check for signature handler. 1502 __ load_and_test_long(signature_handler_entry, method2_(Rmethod, signature_handler)); 1503 __ z_brne(call_signature_handler); 1504 1505 // Method has never been called. Either generate a specialized 1506 // handler or point to the slow one. 1507 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), 1508 Rmethod); 1509 1510 // Reload method. 1511 __ get_method(Rmethod); 1512 1513 // Reload signature handler, it must have been created/assigned in the meantime. 1514 __ z_lg(signature_handler_entry, method2_(Rmethod, signature_handler)); 1515 1516 __ bind(call_signature_handler); 1517 1518 // We have a TOP_IJAVA_FRAME here, which belongs to us. 1519 __ set_top_ijava_frame_at_SP_as_last_Java_frame(Z_SP, Z_R1/*tmp*/); 1520 1521 // Call signature handler and pass locals address in Z_ARG1. 1522 __ z_lgr(Z_ARG1, Z_locals); 1523 __ call_stub(signature_handler_entry); 1524 // Save result handler returned by signature handler. 1525 __ z_lgr(Rresult_handler, Z_RET); 1526 1527 // Reload method (the slow signature handler may block for GC). 1528 __ get_method(Rmethod); 1529 1530 // Pass mirror handle if static call. 1531 { 1532 Label method_is_not_static; 1533 __ testbit(method2_(Rmethod, access_flags), JVM_ACC_STATIC_BIT); 1534 __ z_bfalse(method_is_not_static); 1535 // Get mirror. 1536 __ load_mirror(Z_R1, Rmethod); 1537 // z_ijava_state.oop_temp = pool_holder->klass_part()->java_mirror(); 1538 __ z_stg(Z_R1, oop_tmp_offset, Z_fp); 1539 // Pass handle to mirror as 2nd argument to JNI method. 1540 __ add2reg(Z_ARG2, oop_tmp_offset, Z_fp); 1541 __ bind(method_is_not_static); 1542 } 1543 1544 // Pass JNIEnv address as first parameter. 1545 __ add2reg(Z_ARG1, in_bytes(JavaThread::jni_environment_offset()), Z_thread); 1546 1547 // Note: last java frame has been set above already. The pc from there 1548 // is precise enough. 1549 1550 // Get native function entry point before we change the thread state. 1551 __ z_lg(Z_R1/*native_method_entry*/, method2_(Rmethod, native_function)); 1552 1553 //============================================================================= 1554 // Transition from _thread_in_Java to _thread_in_native. As soon as 1555 // we make this change the safepoint code needs to be certain that 1556 // the last Java frame we established is good. The pc in that frame 1557 // just need to be near here not an actual return address. 1558 #ifdef ASSERT 1559 { 1560 NearLabel L; 1561 __ mem2reg_opt(Z_R14, Address(Z_thread, JavaThread::thread_state_offset()), false /*32 bits*/); 1562 __ compareU32_and_branch(Z_R14, _thread_in_Java, Assembler::bcondEqual, L); 1563 reentry = __ stop_chain_static(reentry, "Wrong thread state in native stub"); 1564 __ bind(L); 1565 } 1566 #endif 1567 1568 // Memory ordering: Z does not reorder store/load with subsequent load. That's strong enough. 1569 __ set_thread_state(_thread_in_native); 1570 1571 //============================================================================= 1572 // Call the native method. Argument registers must not have been 1573 // overwritten since "__ call_stub(signature_handler);" (except for 1574 // ARG1 and ARG2 for static methods). 1575 1576 __ call_c(Z_R1/*native_method_entry*/); 1577 1578 // NOTE: frame::interpreter_frame_result() depends on these stores. 1579 __ z_stg(Z_RET, _z_ijava_state_neg(lresult), Z_fp); 1580 __ freg2mem_opt(Z_FRET, Address(Z_fp, _z_ijava_state_neg(fresult))); 1581 const Register Rlresult = signature_handler_entry; 1582 assert(Rlresult->is_nonvolatile(), "Rlresult must be in a non-volatile register"); 1583 __ z_lgr(Rlresult, Z_RET); 1584 1585 // Z_method may no longer be valid, because of GC. 1586 1587 // Block, if necessary, before resuming in _thread_in_Java state. 1588 // In order for GC to work, don't clear the last_Java_sp until after 1589 // blocking. 1590 1591 //============================================================================= 1592 // Switch thread to "native transition" state before reading the 1593 // synchronization state. This additional state is necessary 1594 // because reading and testing the synchronization state is not 1595 // atomic w.r.t. GC, as this scenario demonstrates: Java thread A, 1596 // in _thread_in_native state, loads _not_synchronized and is 1597 // preempted. VM thread changes sync state to synchronizing and 1598 // suspends threads for GC. Thread A is resumed to finish this 1599 // native method, but doesn't block here since it didn't see any 1600 // synchronization is progress, and escapes. 1601 1602 __ set_thread_state(_thread_in_native_trans); 1603 if (UseMembar) { 1604 __ z_fence(); 1605 } else { 1606 // Write serialization page so VM thread can do a pseudo remote 1607 // membar. We use the current thread pointer to calculate a thread 1608 // specific offset to write to within the page. This minimizes bus 1609 // traffic due to cache line collision. 1610 __ serialize_memory(Z_thread, Z_R1, Z_R0); 1611 } 1612 // Now before we return to java we must look for a current safepoint 1613 // (a new safepoint can not start since we entered native_trans). 1614 // We must check here because a current safepoint could be modifying 1615 // the callers registers right this moment. 1616 1617 // Check for safepoint operation in progress and/or pending suspend requests. 1618 { 1619 Label Continue, do_safepoint; 1620 __ safepoint_poll(do_safepoint, Z_R1); 1621 // Check for suspend. 1622 __ load_and_test_int(Z_R0/*suspend_flags*/, thread_(suspend_flags)); 1623 __ z_bre(Continue); // 0 -> no flag set -> not suspended 1624 __ bind(do_safepoint); 1625 __ z_lgr(Z_ARG1, Z_thread); 1626 __ call_c(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)); 1627 __ bind(Continue); 1628 } 1629 1630 //============================================================================= 1631 // Back in Interpreter Frame. 1632 1633 // We are in thread_in_native_trans here and back in the normal 1634 // interpreter frame. We don't have to do anything special about 1635 // safepoints and we can switch to Java mode anytime we are ready. 1636 1637 // Note: frame::interpreter_frame_result has a dependency on how the 1638 // method result is saved across the call to post_method_exit. For 1639 // native methods it assumes that the non-FPU/non-void result is 1640 // saved in z_ijava_state.lresult and a FPU result in z_ijava_state.fresult. If 1641 // this changes then the interpreter_frame_result implementation 1642 // will need to be updated too. 1643 1644 //============================================================================= 1645 // Back in Java. 1646 1647 // Memory ordering: Z does not reorder store/load with subsequent 1648 // load. That's strong enough. 1649 __ set_thread_state(_thread_in_Java); 1650 1651 __ reset_last_Java_frame(); 1652 1653 // We reset the JNI handle block only after unboxing the result; see below. 1654 1655 // The method register is junk from after the thread_in_native transition 1656 // until here. Also can't call_VM until the bcp has been 1657 // restored. Need bcp for throwing exception below so get it now. 1658 __ get_method(Rmethod); 1659 1660 // Restore Z_bcp to have legal interpreter frame, 1661 // i.e., bci == 0 <=> Z_bcp == code_base(). 1662 __ z_lg(Z_bcp, Address(Rmethod, Method::const_offset())); // get constMethod 1663 __ add2reg(Z_bcp, in_bytes(ConstMethod::codes_offset())); // get codebase 1664 1665 if (CheckJNICalls) { 1666 // clear_pending_jni_exception_check 1667 __ clear_mem(Address(Z_thread, JavaThread::pending_jni_exception_check_fn_offset()), sizeof(oop)); 1668 } 1669 1670 // Check if the native method returns an oop, and if so, move it 1671 // from the jni handle to z_ijava_state.oop_temp. This is 1672 // necessary, because we reset the jni handle block below. 1673 // NOTE: frame::interpreter_frame_result() depends on this, too. 1674 { NearLabel no_oop_result; 1675 __ load_absolute_address(Z_R1, AbstractInterpreter::result_handler(T_OBJECT)); 1676 __ compareU64_and_branch(Z_R1, Rresult_handler, Assembler::bcondNotEqual, no_oop_result); 1677 __ resolve_jobject(Rlresult, /* tmp1 */ Rmethod, /* tmp2 */ Z_R1); 1678 __ z_stg(Rlresult, oop_tmp_offset, Z_fp); 1679 __ bind(no_oop_result); 1680 } 1681 1682 // Reset handle block. 1683 __ z_lg(Z_R1/*active_handles*/, thread_(active_handles)); 1684 __ clear_mem(Address(Z_R1, JNIHandleBlock::top_offset_in_bytes()), 4); 1685 1686 // Bandle exceptions (exception handling will handle unlocking!). 1687 { 1688 Label L; 1689 __ load_and_test_long(Z_R0/*pending_exception*/, thread_(pending_exception)); 1690 __ z_bre(L); 1691 __ MacroAssembler::call_VM(noreg, 1692 CAST_FROM_FN_PTR(address, 1693 InterpreterRuntime::throw_pending_exception)); 1694 __ should_not_reach_here(); 1695 __ bind(L); 1696 } 1697 1698 if (synchronized) { 1699 Register Rfirst_monitor = Z_ARG2; 1700 __ add2reg(Rfirst_monitor, -(frame::z_ijava_state_size + (int)sizeof(BasicObjectLock)), Z_fp); 1701 #ifdef ASSERT 1702 NearLabel ok; 1703 __ z_lg(Z_R1, _z_ijava_state_neg(monitors), Z_fp); 1704 __ compareU64_and_branch(Rfirst_monitor, Z_R1, Assembler::bcondEqual, ok); 1705 reentry = __ stop_chain_static(reentry, "native_entry:unlock: inconsistent z_ijava_state.monitors"); 1706 __ bind(ok); 1707 #endif 1708 __ unlock_object(Rfirst_monitor); 1709 } 1710 1711 // JVMTI support. Result has already been saved above to the frame. 1712 __ notify_method_exit(true/*native_method*/, ilgl, InterpreterMacroAssembler::NotifyJVMTI); 1713 1714 // Move native method result back into proper registers and return. 1715 // C++ interpreter does not use result handler. So do we need to here? TODO(ZASM): check if correct. 1716 { NearLabel no_oop_or_null; 1717 __ mem2freg_opt(Z_FRET, Address(Z_fp, _z_ijava_state_neg(fresult))); 1718 __ load_and_test_long(Z_RET, Address(Z_fp, _z_ijava_state_neg(lresult))); 1719 __ z_bre(no_oop_or_null); // No unboxing if the result is NULL. 1720 __ load_absolute_address(Z_R1, AbstractInterpreter::result_handler(T_OBJECT)); 1721 __ compareU64_and_branch(Z_R1, Rresult_handler, Assembler::bcondNotEqual, no_oop_or_null); 1722 __ z_lg(Z_RET, oop_tmp_offset, Z_fp); 1723 __ verify_oop(Z_RET); 1724 __ bind(no_oop_or_null); 1725 } 1726 1727 // Pop the native method's interpreter frame. 1728 __ pop_interpreter_frame(Z_R14 /*return_pc*/, Z_ARG2/*tmp1*/, Z_ARG3/*tmp2*/); 1729 1730 // Return to caller. 1731 __ z_br(Z_R14); 1732 1733 if (inc_counter) { 1734 // Handle overflow of counter and compile method. 1735 __ bind(invocation_counter_overflow); 1736 generate_counter_overflow(continue_after_compile); 1737 } 1738 1739 BLOCK_COMMENT("} native_entry"); 1740 1741 return entry_point; 1742 } 1743 1744 // 1745 // Generic interpreted method entry to template interpreter. 1746 // 1747 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) { 1748 address entry_point = __ pc(); 1749 1750 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 1751 1752 // Interpreter entry for ordinary Java methods. 1753 // 1754 // Registers alive 1755 // Z_SP - stack pointer 1756 // Z_thread - JavaThread* 1757 // Z_method - callee's method (method to be invoked) 1758 // Z_esp - operand (or expression) stack pointer of caller. one slot above last arg. 1759 // Z_R10 - sender sp (before modifications, e.g. by c2i adapter 1760 // and as well by generate_fixed_frame below) 1761 // Z_R14 - return address to caller (call_stub or c2i_adapter) 1762 // 1763 // Registers updated 1764 // Z_SP - stack pointer 1765 // Z_fp - callee's framepointer 1766 // Z_esp - callee's operand stack pointer 1767 // points to the slot above the value on top 1768 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord) 1769 // Z_tos - integer result, if any 1770 // z_ftos - floating point result, if any 1771 // 1772 // 1773 // stack layout at this point: 1774 // 1775 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (Z_R10 will be below Z_SP if 1776 // frame was extended by c2i adapter) 1777 // [outgoing Java arguments] <-- Z_esp 1778 // ... 1779 // PARENT [PARENT_IJAVA_FRAME_ABI] 1780 // ... 1781 // 1782 // stack layout before dispatching the first bytecode: 1783 // 1784 // F0 [TOP_IJAVA_FRAME_ABI] <-- Z_SP 1785 // [operand stack] <-- Z_esp 1786 // monitor (optional, can grow) 1787 // [IJAVA_STATE] 1788 // F1 [PARENT_IJAVA_FRAME_ABI] <-- Z_fp (== *Z_SP) 1789 // [F0's locals] <-- Z_locals 1790 // [F1's operand stack] 1791 // [F1's monitors] (optional) 1792 // [IJAVA_STATE] 1793 1794 // Make sure registers are different! 1795 assert_different_registers(Z_thread, Z_method, Z_esp); 1796 1797 BLOCK_COMMENT("normal_entry {"); 1798 1799 // Make sure method is not native and not abstract. 1800 // Rethink these assertions - they can be simplified and shared. 1801 #ifdef ASSERT 1802 address reentry = NULL; 1803 { Label L; 1804 __ testbit(method_(access_flags), JVM_ACC_NATIVE_BIT); 1805 __ z_bfalse(L); 1806 reentry = __ stop_chain_static(reentry, "tried to execute native method as non-native"); 1807 __ bind(L); 1808 } 1809 { Label L; 1810 __ testbit(method_(access_flags), JVM_ACC_ABSTRACT_BIT); 1811 __ z_bfalse(L); 1812 reentry = __ stop_chain_static(reentry, "tried to execute abstract method as non-abstract"); 1813 __ bind(L); 1814 } 1815 #endif // ASSERT 1816 1817 #ifdef ASSERT 1818 // Save the return PC into the callers frame for assertion in generate_fixed_frame. 1819 __ save_return_pc(Z_R14); 1820 #endif 1821 1822 // Generate the code to allocate the interpreter stack frame. 1823 generate_fixed_frame(false); 1824 1825 const Address do_not_unlock_if_synchronized(Z_thread, JavaThread::do_not_unlock_if_synchronized_offset()); 1826 // Since at this point in the method invocation the exception handler 1827 // would try to exit the monitor of synchronized methods which hasn't 1828 // been entered yet, we set the thread local variable 1829 // _do_not_unlock_if_synchronized to true. If any exception was thrown by 1830 // runtime, exception handling i.e. unlock_if_synchronized_method will 1831 // check this thread local flag. 1832 __ z_mvi(do_not_unlock_if_synchronized, true); 1833 1834 __ profile_parameters_type(Z_tmp_2, Z_ARG3, Z_ARG4); 1835 1836 // Increment invocation counter and check for overflow. 1837 // 1838 // Note: checking for negative value instead of overflow so we have a 'sticky' 1839 // overflow test (may be of importance as soon as we have true MT/MP). 1840 NearLabel invocation_counter_overflow; 1841 NearLabel profile_method; 1842 NearLabel profile_method_continue; 1843 NearLabel Lcontinue; 1844 if (inc_counter) { 1845 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue); 1846 if (ProfileInterpreter) { 1847 __ bind(profile_method_continue); 1848 } 1849 } 1850 __ bind(Lcontinue); 1851 1852 bang_stack_shadow_pages(false); 1853 1854 // Reset the _do_not_unlock_if_synchronized flag. 1855 __ z_mvi(do_not_unlock_if_synchronized, false); 1856 1857 // Check for synchronized methods. 1858 // Must happen AFTER invocation_counter check and stack overflow check, 1859 // so method is not locked if overflows. 1860 if (synchronized) { 1861 // Allocate monitor and lock method. 1862 lock_method(); 1863 } else { 1864 #ifdef ASSERT 1865 { Label L; 1866 __ get_method(Z_R1_scratch); 1867 __ testbit(method2_(Z_R1_scratch, access_flags), JVM_ACC_SYNCHRONIZED_BIT); 1868 __ z_bfalse(L); 1869 reentry = __ stop_chain_static(reentry, "method needs synchronization"); 1870 __ bind(L); 1871 } 1872 #endif // ASSERT 1873 } 1874 1875 // start execution 1876 1877 #ifdef ASSERT 1878 __ verify_esp(Z_esp, Z_R1_scratch); 1879 1880 __ verify_thread(); 1881 #endif 1882 1883 // jvmti support 1884 __ notify_method_entry(); 1885 1886 // Start executing instructions. 1887 __ dispatch_next(vtos); 1888 // Dispatch_next does not return. 1889 DEBUG_ONLY(__ should_not_reach_here()); 1890 1891 // Invocation counter overflow. 1892 if (inc_counter) { 1893 if (ProfileInterpreter) { 1894 // We have decided to profile this method in the interpreter. 1895 __ bind(profile_method); 1896 1897 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); 1898 __ set_method_data_pointer_for_bcp(); 1899 __ z_bru(profile_method_continue); 1900 } 1901 1902 // Handle invocation counter overflow. 1903 __ bind(invocation_counter_overflow); 1904 generate_counter_overflow(Lcontinue); 1905 } 1906 1907 BLOCK_COMMENT("} normal_entry"); 1908 1909 return entry_point; 1910 } 1911 1912 1913 /** 1914 * Method entry for static native methods: 1915 * int java.util.zip.CRC32.update(int crc, int b) 1916 */ 1917 address TemplateInterpreterGenerator::generate_CRC32_update_entry() { 1918 1919 if (UseCRC32Intrinsics) { 1920 uint64_t entry_off = __ offset(); 1921 Label slow_path; 1922 1923 // If we need a safepoint check, generate full interpreter entry. 1924 __ safepoint_poll(slow_path, Z_R1); 1925 1926 BLOCK_COMMENT("CRC32_update {"); 1927 1928 // We don't generate local frame and don't align stack because 1929 // we not even call stub code (we generate the code inline) 1930 // and there is no safepoint on this path. 1931 1932 // Load java parameters. 1933 // Z_esp is callers operand stack pointer, i.e. it points to the parameters. 1934 const Register argP = Z_esp; 1935 const Register crc = Z_ARG1; // crc value 1936 const Register data = Z_ARG2; // address of java byte value (kernel_crc32 needs address) 1937 const Register dataLen = Z_ARG3; // source data len (1 byte). Not used because calling the single-byte emitter. 1938 const Register table = Z_ARG4; // address of crc32 table 1939 1940 // Arguments are reversed on java expression stack. 1941 __ z_la(data, 3+1*wordSize, argP); // byte value (stack address). 1942 // Being passed as an int, the single byte is at offset +3. 1943 __ z_llgf(crc, 2 * wordSize, argP); // Current crc state, zero extend to 64 bit to have a clean register. 1944 1945 StubRoutines::zarch::generate_load_crc_table_addr(_masm, table); 1946 __ kernel_crc32_singleByte(crc, data, dataLen, table, Z_R1, true); 1947 1948 // Restore caller sp for c2i case. 1949 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. 1950 1951 __ z_br(Z_R14); 1952 1953 BLOCK_COMMENT("} CRC32_update"); 1954 1955 // Use a previously generated vanilla native entry as the slow path. 1956 BIND(slow_path); 1957 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), Z_R1); 1958 return __ addr_at(entry_off); 1959 } 1960 1961 return NULL; 1962 } 1963 1964 1965 /** 1966 * Method entry for static native methods: 1967 * int java.util.zip.CRC32.updateBytes( int crc, byte[] b, int off, int len) 1968 * int java.util.zip.CRC32.updateByteBuffer(int crc, long* buf, int off, int len) 1969 */ 1970 address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) { 1971 1972 if (UseCRC32Intrinsics) { 1973 uint64_t entry_off = __ offset(); 1974 Label slow_path; 1975 1976 // If we need a safepoint check, generate full interpreter entry. 1977 __ safepoint_poll(slow_path, Z_R1); 1978 1979 // We don't generate local frame and don't align stack because 1980 // we call stub code and there is no safepoint on this path. 1981 1982 // Load parameters. 1983 // Z_esp is callers operand stack pointer, i.e. it points to the parameters. 1984 const Register argP = Z_esp; 1985 const Register crc = Z_ARG1; // crc value 1986 const Register data = Z_ARG2; // address of java byte array 1987 const Register dataLen = Z_ARG3; // source data len 1988 const Register table = Z_ARG4; // address of crc32 table 1989 const Register t0 = Z_R10; // work reg for kernel* emitters 1990 const Register t1 = Z_R11; // work reg for kernel* emitters 1991 const Register t2 = Z_R12; // work reg for kernel* emitters 1992 const Register t3 = Z_R13; // work reg for kernel* emitters 1993 1994 // Arguments are reversed on java expression stack. 1995 // Calculate address of start element. 1996 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) { // Used for "updateByteBuffer direct". 1997 // crc @ (SP + 5W) (32bit) 1998 // buf @ (SP + 3W) (64bit ptr to long array) 1999 // off @ (SP + 2W) (32bit) 2000 // dataLen @ (SP + 1W) (32bit) 2001 // data = buf + off 2002 BLOCK_COMMENT("CRC32_updateByteBuffer {"); 2003 __ z_llgf(crc, 5*wordSize, argP); // current crc state 2004 __ z_lg(data, 3*wordSize, argP); // start of byte buffer 2005 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset. 2006 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process 2007 } else { // Used for "updateBytes update". 2008 // crc @ (SP + 4W) (32bit) 2009 // buf @ (SP + 3W) (64bit ptr to byte array) 2010 // off @ (SP + 2W) (32bit) 2011 // dataLen @ (SP + 1W) (32bit) 2012 // data = buf + off + base_offset 2013 BLOCK_COMMENT("CRC32_updateBytes {"); 2014 __ z_llgf(crc, 4*wordSize, argP); // current crc state 2015 __ z_lg(data, 3*wordSize, argP); // start of byte buffer 2016 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset. 2017 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process 2018 __ z_aghi(data, arrayOopDesc::base_offset_in_bytes(T_BYTE)); 2019 } 2020 2021 StubRoutines::zarch::generate_load_crc_table_addr(_masm, table); 2022 2023 __ resize_frame(-(6*8), Z_R0, true); // Resize frame to provide add'l space to spill 5 registers. 2024 __ z_stmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 to make them available as work registers. 2025 __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, true); 2026 __ z_lmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 back from stack. 2027 2028 // Restore caller sp for c2i case. 2029 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. 2030 2031 __ z_br(Z_R14); 2032 2033 BLOCK_COMMENT("} CRC32_update{Bytes|ByteBuffer}"); 2034 2035 // Use a previously generated vanilla native entry as the slow path. 2036 BIND(slow_path); 2037 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), Z_R1); 2038 return __ addr_at(entry_off); 2039 } 2040 2041 return NULL; 2042 } 2043 2044 2045 /** 2046 * Method entry for intrinsic-candidate (non-native) methods: 2047 * int java.util.zip.CRC32C.updateBytes( int crc, byte[] b, int off, int end) 2048 * int java.util.zip.CRC32C.updateDirectByteBuffer(int crc, long* buf, int off, int end) 2049 * Unlike CRC32, CRC32C does not have any methods marked as native 2050 * CRC32C also uses an "end" variable instead of the length variable CRC32 uses 2051 */ 2052 address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) { 2053 2054 if (UseCRC32CIntrinsics) { 2055 uint64_t entry_off = __ offset(); 2056 2057 // We don't generate local frame and don't align stack because 2058 // we call stub code and there is no safepoint on this path. 2059 2060 // Load parameters. 2061 // Z_esp is callers operand stack pointer, i.e. it points to the parameters. 2062 const Register argP = Z_esp; 2063 const Register crc = Z_ARG1; // crc value 2064 const Register data = Z_ARG2; // address of java byte array 2065 const Register dataLen = Z_ARG3; // source data len 2066 const Register table = Z_ARG4; // address of crc32 table 2067 const Register t0 = Z_R10; // work reg for kernel* emitters 2068 const Register t1 = Z_R11; // work reg for kernel* emitters 2069 const Register t2 = Z_R12; // work reg for kernel* emitters 2070 const Register t3 = Z_R13; // work reg for kernel* emitters 2071 2072 // Arguments are reversed on java expression stack. 2073 // Calculate address of start element. 2074 if (kind == Interpreter::java_util_zip_CRC32C_updateDirectByteBuffer) { // Used for "updateByteBuffer direct". 2075 // crc @ (SP + 5W) (32bit) 2076 // buf @ (SP + 3W) (64bit ptr to long array) 2077 // off @ (SP + 2W) (32bit) 2078 // dataLen @ (SP + 1W) (32bit) 2079 // data = buf + off 2080 BLOCK_COMMENT("CRC32C_updateDirectByteBuffer {"); 2081 __ z_llgf(crc, 5*wordSize, argP); // current crc state 2082 __ z_lg(data, 3*wordSize, argP); // start of byte buffer 2083 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset. 2084 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process, calculated as 2085 __ z_sgf(dataLen, Address(argP, 2*wordSize)); // (end_index - offset) 2086 } else { // Used for "updateBytes update". 2087 // crc @ (SP + 4W) (32bit) 2088 // buf @ (SP + 3W) (64bit ptr to byte array) 2089 // off @ (SP + 2W) (32bit) 2090 // dataLen @ (SP + 1W) (32bit) 2091 // data = buf + off + base_offset 2092 BLOCK_COMMENT("CRC32C_updateBytes {"); 2093 __ z_llgf(crc, 4*wordSize, argP); // current crc state 2094 __ z_lg(data, 3*wordSize, argP); // start of byte buffer 2095 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset. 2096 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process, calculated as 2097 __ z_sgf(dataLen, Address(argP, 2*wordSize)); // (end_index - offset) 2098 __ z_aghi(data, arrayOopDesc::base_offset_in_bytes(T_BYTE)); 2099 } 2100 2101 StubRoutines::zarch::generate_load_crc32c_table_addr(_masm, table); 2102 2103 __ resize_frame(-(6*8), Z_R0, true); // Resize frame to provide add'l space to spill 5 registers. 2104 __ z_stmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 to make them available as work registers. 2105 __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, false); 2106 __ z_lmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 back from stack. 2107 2108 // Restore caller sp for c2i case. 2109 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. 2110 2111 __ z_br(Z_R14); 2112 2113 BLOCK_COMMENT("} CRC32C_update{Bytes|DirectByteBuffer}"); 2114 return __ addr_at(entry_off); 2115 } 2116 2117 return NULL; 2118 } 2119 2120 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { 2121 // Quick & dirty stack overflow checking: bang the stack & handle trap. 2122 // Note that we do the banging after the frame is setup, since the exception 2123 // handling code expects to find a valid interpreter frame on the stack. 2124 // Doing the banging earlier fails if the caller frame is not an interpreter 2125 // frame. 2126 // (Also, the exception throwing code expects to unlock any synchronized 2127 // method receiver, so do the banging after locking the receiver.) 2128 2129 // Bang each page in the shadow zone. We can't assume it's been done for 2130 // an interpreter frame with greater than a page of locals, so each page 2131 // needs to be checked. Only true for non-native. For native, we only bang the last page. 2132 if (UseStackBanging) { 2133 const int page_size = os::vm_page_size(); 2134 const int n_shadow_pages = (int)(JavaThread::stack_shadow_zone_size()/page_size); 2135 const int start_page_num = native_call ? n_shadow_pages : 1; 2136 for (int pages = start_page_num; pages <= n_shadow_pages; pages++) { 2137 __ bang_stack_with_offset(pages*page_size); 2138 } 2139 } 2140 } 2141 2142 //----------------------------------------------------------------------------- 2143 // Exceptions 2144 2145 void TemplateInterpreterGenerator::generate_throw_exception() { 2146 2147 BLOCK_COMMENT("throw_exception {"); 2148 2149 // Entry point in previous activation (i.e., if the caller was interpreted). 2150 Interpreter::_rethrow_exception_entry = __ pc(); 2151 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Frame accessors use Z_fp. 2152 // Z_ARG1 (==Z_tos): exception 2153 // Z_ARG2 : Return address/pc that threw exception. 2154 __ restore_bcp(); // R13 points to call/send. 2155 __ restore_locals(); 2156 2157 // Fallthrough, no need to restore Z_esp. 2158 2159 // Entry point for exceptions thrown within interpreter code. 2160 Interpreter::_throw_exception_entry = __ pc(); 2161 // Expression stack is undefined here. 2162 // Z_ARG1 (==Z_tos): exception 2163 // Z_bcp: exception bcp 2164 __ verify_oop(Z_ARG1); 2165 __ z_lgr(Z_ARG2, Z_ARG1); 2166 2167 // Expression stack must be empty before entering the VM in case of 2168 // an exception. 2169 __ empty_expression_stack(); 2170 // Find exception handler address and preserve exception oop. 2171 const Register Rpreserved_exc_oop = Z_tmp_1; 2172 __ call_VM(Rpreserved_exc_oop, 2173 CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), 2174 Z_ARG2); 2175 // Z_RET: exception handler entry point 2176 // Z_bcp: bcp for exception handler 2177 __ push_ptr(Rpreserved_exc_oop); // Push exception which is now the only value on the stack. 2178 __ z_br(Z_RET); // Jump to exception handler (may be _remove_activation_entry!). 2179 2180 // If the exception is not handled in the current frame the frame is 2181 // removed and the exception is rethrown (i.e. exception 2182 // continuation is _rethrow_exception). 2183 // 2184 // Note: At this point the bci is still the bci for the instruction 2185 // which caused the exception and the expression stack is 2186 // empty. Thus, for any VM calls at this point, GC will find a legal 2187 // oop map (with empty expression stack). 2188 2189 // 2190 // JVMTI PopFrame support 2191 // 2192 2193 Interpreter::_remove_activation_preserving_args_entry = __ pc(); 2194 __ z_lg(Z_fp, _z_parent_ijava_frame_abi(callers_sp), Z_SP); 2195 __ empty_expression_stack(); 2196 // Set the popframe_processing bit in pending_popframe_condition 2197 // indicating that we are currently handling popframe, so that 2198 // call_VMs that may happen later do not trigger new popframe 2199 // handling cycles. 2200 __ load_sized_value(Z_tmp_1, Address(Z_thread, JavaThread::popframe_condition_offset()), 4, false /*signed*/); 2201 __ z_oill(Z_tmp_1, JavaThread::popframe_processing_bit); 2202 __ z_sty(Z_tmp_1, thread_(popframe_condition)); 2203 2204 { 2205 // Check to see whether we are returning to a deoptimized frame. 2206 // (The PopFrame call ensures that the caller of the popped frame is 2207 // either interpreted or compiled and deoptimizes it if compiled.) 2208 // In this case, we can't call dispatch_next() after the frame is 2209 // popped, but instead must save the incoming arguments and restore 2210 // them after deoptimization has occurred. 2211 // 2212 // Note that we don't compare the return PC against the 2213 // deoptimization blob's unpack entry because of the presence of 2214 // adapter frames in C2. 2215 NearLabel caller_not_deoptimized; 2216 __ z_lg(Z_ARG1, _z_parent_ijava_frame_abi(return_pc), Z_fp); 2217 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), Z_ARG1); 2218 __ compareU64_and_branch(Z_RET, (intptr_t)0, Assembler::bcondNotEqual, caller_not_deoptimized); 2219 2220 // Compute size of arguments for saving when returning to 2221 // deoptimized caller. 2222 __ get_method(Z_ARG2); 2223 __ z_lg(Z_ARG2, Address(Z_ARG2, Method::const_offset())); 2224 __ z_llgh(Z_ARG2, Address(Z_ARG2, ConstMethod::size_of_parameters_offset())); 2225 __ z_sllg(Z_ARG2, Z_ARG2, Interpreter::logStackElementSize); // slots 2 bytes 2226 __ restore_locals(); 2227 // Compute address of args to be saved. 2228 __ z_lgr(Z_ARG3, Z_locals); 2229 __ z_slgr(Z_ARG3, Z_ARG2); 2230 __ add2reg(Z_ARG3, wordSize); 2231 // Save these arguments. 2232 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), 2233 Z_thread, Z_ARG2, Z_ARG3); 2234 2235 __ remove_activation(vtos, Z_R14, 2236 /* throw_monitor_exception */ false, 2237 /* install_monitor_exception */ false, 2238 /* notify_jvmdi */ false); 2239 2240 // Inform deoptimization that it is responsible for restoring 2241 // these arguments. 2242 __ store_const(thread_(popframe_condition), 2243 JavaThread::popframe_force_deopt_reexecution_bit, 2244 Z_tmp_1, false); 2245 2246 // Continue in deoptimization handler. 2247 __ z_br(Z_R14); 2248 2249 __ bind(caller_not_deoptimized); 2250 } 2251 2252 // Clear the popframe condition flag. 2253 __ clear_mem(thread_(popframe_condition), sizeof(int)); 2254 2255 __ remove_activation(vtos, 2256 noreg, // Retaddr is not used. 2257 false, // throw_monitor_exception 2258 false, // install_monitor_exception 2259 false); // notify_jvmdi 2260 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer. 2261 __ restore_bcp(); 2262 __ restore_locals(); 2263 __ restore_esp(); 2264 // The method data pointer was incremented already during 2265 // call profiling. We have to restore the mdp for the current bcp. 2266 if (ProfileInterpreter) { 2267 __ set_method_data_pointer_for_bcp(); 2268 } 2269 #if INCLUDE_JVMTI 2270 { 2271 Label L_done; 2272 2273 __ z_cli(0, Z_bcp, Bytecodes::_invokestatic); 2274 __ z_brc(Assembler::bcondNotEqual, L_done); 2275 2276 // The member name argument must be restored if _invokestatic is 2277 // re-executed after a PopFrame call. Detect such a case in the 2278 // InterpreterRuntime function and return the member name 2279 // argument, or NULL. 2280 __ z_lg(Z_ARG2, Address(Z_locals)); 2281 __ get_method(Z_ARG3); 2282 __ call_VM(Z_tmp_1, 2283 CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), 2284 Z_ARG2, Z_ARG3, Z_bcp); 2285 2286 __ z_ltgr(Z_tmp_1, Z_tmp_1); 2287 __ z_brc(Assembler::bcondEqual, L_done); 2288 2289 __ z_stg(Z_tmp_1, Address(Z_esp, wordSize)); 2290 __ bind(L_done); 2291 } 2292 #endif // INCLUDE_JVMTI 2293 __ dispatch_next(vtos); 2294 // End of PopFrame support. 2295 Interpreter::_remove_activation_entry = __ pc(); 2296 2297 // In between activations - previous activation type unknown yet 2298 // compute continuation point - the continuation point expects the 2299 // following registers set up: 2300 // 2301 // Z_ARG1 (==Z_tos): exception 2302 // Z_ARG2 : return address/pc that threw exception 2303 2304 Register return_pc = Z_tmp_1; 2305 Register handler = Z_tmp_2; 2306 assert(return_pc->is_nonvolatile(), "use non-volatile reg. to preserve exception pc"); 2307 assert(handler->is_nonvolatile(), "use non-volatile reg. to handler pc"); 2308 __ asm_assert_ijava_state_magic(return_pc/*tmp*/); // The top frame should be an interpreter frame. 2309 __ z_lg(return_pc, _z_parent_ijava_frame_abi(return_pc), Z_fp); 2310 2311 // Moved removing the activation after VM call, because the new top 2312 // frame does not necessarily have the z_abi_160 required for a VM 2313 // call (e.g. if it is compiled). 2314 2315 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 2316 SharedRuntime::exception_handler_for_return_address), 2317 Z_thread, return_pc); 2318 __ z_lgr(handler, Z_RET); // Save exception handler. 2319 2320 // Preserve exception over this code sequence. 2321 __ pop_ptr(Z_ARG1); 2322 __ set_vm_result(Z_ARG1); 2323 // Remove the activation (without doing throws on illegalMonitorExceptions). 2324 __ remove_activation(vtos, noreg/*ret.pc already loaded*/, false/*throw exc*/, true/*install exc*/, false/*notify jvmti*/); 2325 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer. 2326 2327 __ get_vm_result(Z_ARG1); // Restore exception. 2328 __ verify_oop(Z_ARG1); 2329 __ z_lgr(Z_ARG2, return_pc); // Restore return address. 2330 2331 #ifdef ASSERT 2332 // The return_pc in the new top frame is dead... at least that's my 2333 // current understanding. To assert this I overwrite it. 2334 // Note: for compiled frames the handler is the deopt blob 2335 // which writes Z_ARG2 into the return_pc slot. 2336 __ load_const_optimized(return_pc, 0xb00b1); 2337 __ z_stg(return_pc, _z_parent_ijava_frame_abi(return_pc), Z_SP); 2338 #endif 2339 2340 // Z_ARG1 (==Z_tos): exception 2341 // Z_ARG2 : return address/pc that threw exception 2342 2343 // Note that an "issuing PC" is actually the next PC after the call. 2344 __ z_br(handler); // Jump to exception handler of caller. 2345 2346 BLOCK_COMMENT("} throw_exception"); 2347 } 2348 2349 // 2350 // JVMTI ForceEarlyReturn support 2351 // 2352 address TemplateInterpreterGenerator::generate_earlyret_entry_for (TosState state) { 2353 address entry = __ pc(); 2354 2355 BLOCK_COMMENT("earlyret_entry {"); 2356 2357 __ z_lg(Z_fp, _z_parent_ijava_frame_abi(callers_sp), Z_SP); 2358 __ restore_bcp(); 2359 __ restore_locals(); 2360 __ restore_esp(); 2361 __ empty_expression_stack(); 2362 __ load_earlyret_value(state); 2363 2364 Register RjvmtiState = Z_tmp_1; 2365 __ z_lg(RjvmtiState, thread_(jvmti_thread_state)); 2366 __ store_const(Address(RjvmtiState, JvmtiThreadState::earlyret_state_offset()), 2367 JvmtiThreadState::earlyret_inactive, 4, 4, Z_R0_scratch); 2368 2369 if (state == itos) { 2370 // Narrow result if state is itos but result type is smaller. 2371 // Need to narrow in the return bytecode rather than in generate_return_entry 2372 // since compiled code callers expect the result to already be narrowed. 2373 __ narrow(Z_tos, Z_tmp_1); /* fall through */ 2374 } 2375 __ remove_activation(state, 2376 Z_tmp_1, // retaddr 2377 false, // throw_monitor_exception 2378 false, // install_monitor_exception 2379 true); // notify_jvmdi 2380 __ z_br(Z_tmp_1); 2381 2382 BLOCK_COMMENT("} earlyret_entry"); 2383 2384 return entry; 2385 } 2386 2387 //----------------------------------------------------------------------------- 2388 // Helper for vtos entry point generation. 2389 2390 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, 2391 address& bep, 2392 address& cep, 2393 address& sep, 2394 address& aep, 2395 address& iep, 2396 address& lep, 2397 address& fep, 2398 address& dep, 2399 address& vep) { 2400 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); 2401 Label L; 2402 aep = __ pc(); __ push_ptr(); __ z_bru(L); 2403 fep = __ pc(); __ push_f(); __ z_bru(L); 2404 dep = __ pc(); __ push_d(); __ z_bru(L); 2405 lep = __ pc(); __ push_l(); __ z_bru(L); 2406 bep = cep = sep = 2407 iep = __ pc(); __ push_i(); 2408 vep = __ pc(); 2409 __ bind(L); 2410 generate_and_dispatch(t); 2411 } 2412 2413 //----------------------------------------------------------------------------- 2414 2415 #ifndef PRODUCT 2416 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { 2417 address entry = __ pc(); 2418 NearLabel counter_below_trace_threshold; 2419 2420 if (TraceBytecodesAt > 0) { 2421 // Skip runtime call, if the trace threshold is not yet reached. 2422 __ load_absolute_address(Z_tmp_1, (address)&BytecodeCounter::_counter_value); 2423 __ load_absolute_address(Z_tmp_2, (address)&TraceBytecodesAt); 2424 __ load_sized_value(Z_tmp_1, Address(Z_tmp_1), 4, false /*signed*/); 2425 __ load_sized_value(Z_tmp_2, Address(Z_tmp_2), 8, false /*signed*/); 2426 __ compareU64_and_branch(Z_tmp_1, Z_tmp_2, Assembler::bcondLow, counter_below_trace_threshold); 2427 } 2428 2429 int offset2 = state == ltos || state == dtos ? 2 : 1; 2430 2431 __ push(state); 2432 // Preserved return pointer is in Z_R14. 2433 // InterpreterRuntime::trace_bytecode() preserved and returns the value passed as second argument. 2434 __ z_lgr(Z_ARG2, Z_R14); 2435 __ z_lg(Z_ARG3, Address(Z_esp, Interpreter::expr_offset_in_bytes(0))); 2436 if (WizardMode) { 2437 __ z_lgr(Z_ARG4, Z_esp); // Trace Z_esp in WizardMode. 2438 } else { 2439 __ z_lg(Z_ARG4, Address(Z_esp, Interpreter::expr_offset_in_bytes(offset2))); 2440 } 2441 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), Z_ARG2, Z_ARG3, Z_ARG4); 2442 __ z_lgr(Z_R14, Z_RET); // Estore return address (see above). 2443 __ pop(state); 2444 2445 __ bind(counter_below_trace_threshold); 2446 __ z_br(Z_R14); // return 2447 2448 return entry; 2449 } 2450 2451 // Make feasible for old CPUs. 2452 void TemplateInterpreterGenerator::count_bytecode() { 2453 __ load_absolute_address(Z_R1_scratch, (address) &BytecodeCounter::_counter_value); 2454 __ add2mem_32(Address(Z_R1_scratch), 1, Z_R0_scratch); 2455 } 2456 2457 void TemplateInterpreterGenerator::histogram_bytecode(Template * t) { 2458 __ load_absolute_address(Z_R1_scratch, (address)&BytecodeHistogram::_counters[ t->bytecode() ]); 2459 __ add2mem_32(Address(Z_R1_scratch), 1, Z_tmp_1); 2460 } 2461 2462 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template * t) { 2463 Address index_addr(Z_tmp_1, (intptr_t) 0); 2464 Register index = Z_tmp_2; 2465 2466 // Load previous index. 2467 __ load_absolute_address(Z_tmp_1, (address) &BytecodePairHistogram::_index); 2468 __ mem2reg_opt(index, index_addr, false); 2469 2470 // Mask with current bytecode and store as new previous index. 2471 __ z_srl(index, BytecodePairHistogram::log2_number_of_codes); 2472 __ load_const_optimized(Z_R0_scratch, 2473 (int)t->bytecode() << BytecodePairHistogram::log2_number_of_codes); 2474 __ z_or(index, Z_R0_scratch); 2475 __ reg2mem_opt(index, index_addr, false); 2476 2477 // Load counter array's address. 2478 __ z_lgfr(index, index); // Sign extend for addressing. 2479 __ z_sllg(index, index, LogBytesPerInt); // index2bytes 2480 __ load_absolute_address(Z_R1_scratch, 2481 (address) &BytecodePairHistogram::_counters); 2482 // Add index and increment counter. 2483 __ z_agr(Z_R1_scratch, index); 2484 __ add2mem_32(Address(Z_R1_scratch), 1, Z_tmp_1); 2485 } 2486 2487 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { 2488 // Call a little run-time stub to avoid blow-up for each bytecode. 2489 // The run-time runtime saves the right registers, depending on 2490 // the tosca in-state for the given template. 2491 address entry = Interpreter::trace_code(t->tos_in()); 2492 guarantee(entry != NULL, "entry must have been generated"); 2493 __ call_stub(entry); 2494 } 2495 2496 void TemplateInterpreterGenerator::stop_interpreter_at() { 2497 NearLabel L; 2498 2499 __ load_absolute_address(Z_tmp_1, (address)&BytecodeCounter::_counter_value); 2500 __ load_absolute_address(Z_tmp_2, (address)&StopInterpreterAt); 2501 __ load_sized_value(Z_tmp_1, Address(Z_tmp_1), 4, false /*signed*/); 2502 __ load_sized_value(Z_tmp_2, Address(Z_tmp_2), 8, false /*signed*/); 2503 __ compareU64_and_branch(Z_tmp_1, Z_tmp_2, Assembler::bcondLow, L); 2504 assert(Z_tmp_1->is_nonvolatile(), "must be nonvolatile to preserve Z_tos"); 2505 assert(Z_F8->is_nonvolatile(), "must be nonvolatile to preserve Z_ftos"); 2506 __ z_lgr(Z_tmp_1, Z_tos); // Save tos. 2507 __ z_lgr(Z_tmp_2, Z_bytecode); // Save Z_bytecode. 2508 __ z_ldr(Z_F8, Z_ftos); // Save ftos. 2509 // Use -XX:StopInterpreterAt=<num> to set the limit 2510 // and break at breakpoint(). 2511 __ call_VM(noreg, CAST_FROM_FN_PTR(address, breakpoint), false); 2512 __ z_lgr(Z_tos, Z_tmp_1); // Restore tos. 2513 __ z_lgr(Z_bytecode, Z_tmp_2); // Save Z_bytecode. 2514 __ z_ldr(Z_ftos, Z_F8); // Restore ftos. 2515 __ bind(L); 2516 } 2517 2518 #endif // !PRODUCT