1 /* 2 * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2016, 2017, 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 "interpreter/abstractInterpreter.hpp" 29 #include "interpreter/bytecodeHistogram.hpp" 30 #include "interpreter/interpreter.hpp" 31 #include "interpreter/interpreterRuntime.hpp" 32 #include "interpreter/interp_masm.hpp" 33 #include "interpreter/templateInterpreterGenerator.hpp" 34 #include "interpreter/templateTable.hpp" 35 #include "oops/arrayOop.hpp" 36 #include "oops/oop.inline.hpp" 37 #include "prims/jvmtiExport.hpp" 38 #include "prims/jvmtiThreadState.hpp" 39 #include "runtime/arguments.hpp" 40 #include "runtime/deoptimization.hpp" 41 #include "runtime/frame.inline.hpp" 42 #include "runtime/sharedRuntime.hpp" 43 #include "runtime/stubRoutines.hpp" 44 #include "runtime/synchronizer.hpp" 45 #include "runtime/timer.hpp" 46 #include "runtime/vframeArray.hpp" 47 #include "utilities/debug.hpp" 48 49 50 // Size of interpreter code. Increase if too small. Interpreter will 51 // fail with a guarantee ("not enough space for interpreter generation"); 52 // if too small. 53 // Run with +PrintInterpreter to get the VM to print out the size. 54 // Max size with JVMTI 55 int TemplateInterpreter::InterpreterCodeSize = 320*K; 56 57 #undef __ 58 #ifdef PRODUCT 59 #define __ _masm-> 60 #else 61 #define __ _masm-> 62 // #define __ (Verbose ? (_masm->block_comment(FILE_AND_LINE),_masm):_masm)-> 63 #endif 64 65 #define BLOCK_COMMENT(str) __ block_comment(str) 66 #define BIND(label) __ bind(label); BLOCK_COMMENT(#label ":") 67 68 #define oop_tmp_offset _z_ijava_state_neg(oop_tmp) 69 70 //----------------------------------------------------------------------------- 71 72 address TemplateInterpreterGenerator::generate_slow_signature_handler() { 73 // 74 // New slow_signature handler that respects the z/Architecture 75 // C calling conventions. 76 // 77 // We get called by the native entry code with our output register 78 // area == 8. First we call InterpreterRuntime::get_result_handler 79 // to copy the pointer to the signature string temporarily to the 80 // first C-argument and to return the result_handler in 81 // Z_RET. Since native_entry will copy the jni-pointer to the 82 // first C-argument slot later on, it's OK to occupy this slot 83 // temporarily. Then we copy the argument list on the java 84 // expression stack into native varargs format on the native stack 85 // and load arguments into argument registers. Integer arguments in 86 // the varargs vector will be sign-extended to 8 bytes. 87 // 88 // On entry: 89 // Z_ARG1 - intptr_t* Address of java argument list in memory. 90 // Z_state - cppInterpreter* Address of interpreter state for 91 // this method 92 // Z_method 93 // 94 // On exit (just before return instruction): 95 // Z_RET contains the address of the result_handler. 96 // Z_ARG2 is not updated for static methods and contains "this" otherwise. 97 // Z_ARG3-Z_ARG5 contain the first 3 arguments of types other than float and double. 98 // Z_FARG1-Z_FARG4 contain the first 4 arguments of type float or double. 99 100 const int LogSizeOfCase = 3; 101 102 const int max_fp_register_arguments = Argument::n_float_register_parameters; 103 const int max_int_register_arguments = Argument::n_register_parameters - 2; // First 2 are reserved. 104 105 const Register arg_java = Z_tmp_2; 106 const Register arg_c = Z_tmp_3; 107 const Register signature = Z_R1_scratch; // Is a string. 108 const Register fpcnt = Z_R0_scratch; 109 const Register argcnt = Z_tmp_4; 110 const Register intSlot = Z_tmp_1; 111 const Register sig_end = Z_tmp_1; // Assumed end of signature (only used in do_object). 112 const Register target_sp = Z_tmp_1; 113 const FloatRegister floatSlot = Z_F1; 114 115 const int d_signature = _z_abi(gpr6); // Only spill space, register contents not affected. 116 const int d_fpcnt = _z_abi(gpr7); // Only spill space, register contents not affected. 117 118 unsigned int entry_offset = __ offset(); 119 120 BLOCK_COMMENT("slow_signature_handler {"); 121 122 // We use target_sp for storing arguments in the C frame. 123 __ save_return_pc(); 124 __ push_frame_abi160(4*BytesPerWord); // Reserve space to save the tmp_[1..4] registers. 125 __ z_stmg(Z_R10, Z_R13, frame::z_abi_160_size, Z_SP); // Save registers only after frame is pushed. 126 127 __ z_lgr(arg_java, Z_ARG1); 128 129 Register method = Z_ARG2; // Directly load into correct argument register. 130 131 __ get_method(method); 132 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::get_signature), Z_thread, method); 133 134 // Move signature to callee saved register. 135 // Don't directly write to stack. Frame is used by VM call. 136 __ z_lgr(Z_tmp_1, Z_RET); 137 138 // Reload method. Register may have been altered by VM call. 139 __ get_method(method); 140 141 // Get address of result handler. 142 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::get_result_handler), Z_thread, method); 143 144 // Save signature address to stack. 145 __ z_stg(Z_tmp_1, d_signature, Z_SP); 146 147 // Don't overwrite return value (Z_RET, Z_ARG1) in rest of the method ! 148 149 { 150 Label isStatic; 151 152 // Test if static. 153 // We can test the bit directly. 154 // Path is Z_method->_access_flags._flags. 155 // We only support flag bits in the least significant byte (assert !). 156 // Therefore add 3 to address that byte within "_flags". 157 // Reload method. VM call above may have destroyed register contents 158 __ get_method(method); 159 __ testbit(method2_(method, access_flags), JVM_ACC_STATIC_BIT); 160 method = noreg; // end of life 161 __ z_btrue(isStatic); 162 163 // For non-static functions, pass "this" in Z_ARG2 and copy it to 2nd C-arg slot. 164 // Need to box the Java object here, so we use arg_java 165 // (address of current Java stack slot) as argument and 166 // don't dereference it as in case of ints, floats, etc.. 167 __ z_lgr(Z_ARG2, arg_java); 168 __ add2reg(arg_java, -BytesPerWord); 169 __ bind(isStatic); 170 } 171 172 // argcnt == 0 corresponds to 3rd C argument. 173 // arg #1 (result handler) and 174 // arg #2 (this, for non-statics), unused else 175 // are reserved and pre-filled above. 176 // arg_java points to the corresponding Java argument here. It 177 // has been decremented by one argument (this) in case of non-static. 178 __ clear_reg(argcnt, true, false); // Don't set CC. 179 __ z_lg(target_sp, 0, Z_SP); 180 __ add2reg(arg_c, _z_abi(remaining_cargs), target_sp); 181 // No floating-point args parsed so far. 182 __ clear_mem(Address(Z_SP, d_fpcnt), 8); 183 184 NearLabel move_intSlot_to_ARG, move_floatSlot_to_FARG; 185 NearLabel loop_start, loop_start_restore, loop_end; 186 NearLabel do_int, do_long, do_float, do_double; 187 NearLabel do_dontreachhere, do_object, do_array, do_boxed; 188 189 #ifdef ASSERT 190 // Signature needs to point to '(' (== 0x28) at entry. 191 __ z_lg(signature, d_signature, Z_SP); 192 __ z_cli(0, signature, (int) '('); 193 __ z_brne(do_dontreachhere); 194 #endif 195 196 __ bind(loop_start_restore); 197 __ z_lg(signature, d_signature, Z_SP); // Restore signature ptr, destroyed by move_XX_to_ARG. 198 199 BIND(loop_start); 200 // Advance to next argument type token from the signature. 201 __ add2reg(signature, 1); 202 203 // Use CLI, works well on all CPU versions. 204 __ z_cli(0, signature, (int) ')'); 205 __ z_bre(loop_end); // end of signature 206 __ z_cli(0, signature, (int) 'L'); 207 __ z_bre(do_object); // object #9 208 __ z_cli(0, signature, (int) 'F'); 209 __ z_bre(do_float); // float #7 210 __ z_cli(0, signature, (int) 'J'); 211 __ z_bre(do_long); // long #6 212 __ z_cli(0, signature, (int) 'B'); 213 __ z_bre(do_int); // byte #1 214 __ z_cli(0, signature, (int) 'Z'); 215 __ z_bre(do_int); // boolean #2 216 __ z_cli(0, signature, (int) 'C'); 217 __ z_bre(do_int); // char #3 218 __ z_cli(0, signature, (int) 'S'); 219 __ z_bre(do_int); // short #4 220 __ z_cli(0, signature, (int) 'I'); 221 __ z_bre(do_int); // int #5 222 __ z_cli(0, signature, (int) 'D'); 223 __ z_bre(do_double); // double #8 224 __ z_cli(0, signature, (int) '['); 225 __ z_bre(do_array); // array #10 226 227 __ bind(do_dontreachhere); 228 229 __ unimplemented("ShouldNotReachHere in slow_signature_handler", 120); 230 231 // Array argument 232 BIND(do_array); 233 234 { 235 Label start_skip, end_skip; 236 237 __ bind(start_skip); 238 239 // Advance to next type tag from signature. 240 __ add2reg(signature, 1); 241 242 // Use CLI, works well on all CPU versions. 243 __ z_cli(0, signature, (int) '['); 244 __ z_bre(start_skip); // Skip further brackets. 245 246 __ z_cli(0, signature, (int) '9'); 247 __ z_brh(end_skip); // no optional size 248 249 __ z_cli(0, signature, (int) '0'); 250 __ z_brnl(start_skip); // Skip optional size. 251 252 __ bind(end_skip); 253 254 __ z_cli(0, signature, (int) 'L'); 255 __ z_brne(do_boxed); // If not array of objects: go directly to do_boxed. 256 } 257 258 // OOP argument 259 BIND(do_object); 260 // Pass by an object's type name. 261 { 262 Label L; 263 264 __ add2reg(sig_end, 4095, signature); // Assume object type name is shorter than 4k. 265 __ load_const_optimized(Z_R0, (int) ';'); // Type name terminator (must be in Z_R0!). 266 __ MacroAssembler::search_string(sig_end, signature); 267 __ z_brl(L); 268 __ z_illtrap(); // No semicolon found: internal error or object name too long. 269 __ bind(L); 270 __ z_lgr(signature, sig_end); 271 // fallthru to do_boxed 272 } 273 274 // Need to box the Java object here, so we use arg_java 275 // (address of current Java stack slot) as argument and 276 // don't dereference it as in case of ints, floats, etc.. 277 278 // UNBOX argument 279 // Load reference and check for NULL. 280 Label do_int_Entry4Boxed; 281 __ bind(do_boxed); 282 { 283 __ load_and_test_long(intSlot, Address(arg_java)); 284 __ z_bre(do_int_Entry4Boxed); 285 __ z_lgr(intSlot, arg_java); 286 __ z_bru(do_int_Entry4Boxed); 287 } 288 289 // INT argument 290 291 // (also for byte, boolean, char, short) 292 // Use lgf for load (sign-extend) and stg for store. 293 BIND(do_int); 294 __ z_lgf(intSlot, 0, arg_java); 295 296 __ bind(do_int_Entry4Boxed); 297 __ add2reg(arg_java, -BytesPerWord); 298 // If argument fits into argument register, go and handle it, otherwise continue. 299 __ compare32_and_branch(argcnt, max_int_register_arguments, 300 Assembler::bcondLow, move_intSlot_to_ARG); 301 __ z_stg(intSlot, 0, arg_c); 302 __ add2reg(arg_c, BytesPerWord); 303 __ z_bru(loop_start); 304 305 // LONG argument 306 307 BIND(do_long); 308 __ add2reg(arg_java, -2*BytesPerWord); // Decrement first to have positive displacement for lg. 309 __ z_lg(intSlot, BytesPerWord, arg_java); 310 // If argument fits into argument register, go and handle it, otherwise continue. 311 __ compare32_and_branch(argcnt, max_int_register_arguments, 312 Assembler::bcondLow, move_intSlot_to_ARG); 313 __ z_stg(intSlot, 0, arg_c); 314 __ add2reg(arg_c, BytesPerWord); 315 __ z_bru(loop_start); 316 317 // FLOAT argumen 318 319 BIND(do_float); 320 __ z_le(floatSlot, 0, arg_java); 321 __ add2reg(arg_java, -BytesPerWord); 322 assert(max_fp_register_arguments <= 255, "always true"); // safety net 323 __ z_cli(d_fpcnt+7, Z_SP, max_fp_register_arguments); 324 __ z_brl(move_floatSlot_to_FARG); 325 __ z_ste(floatSlot, 4, arg_c); 326 __ add2reg(arg_c, BytesPerWord); 327 __ z_bru(loop_start); 328 329 // DOUBLE argument 330 331 BIND(do_double); 332 __ add2reg(arg_java, -2*BytesPerWord); // Decrement first to have positive displacement for lg. 333 __ z_ld(floatSlot, BytesPerWord, arg_java); 334 assert(max_fp_register_arguments <= 255, "always true"); // safety net 335 __ z_cli(d_fpcnt+7, Z_SP, max_fp_register_arguments); 336 __ z_brl(move_floatSlot_to_FARG); 337 __ z_std(floatSlot, 0, arg_c); 338 __ add2reg(arg_c, BytesPerWord); 339 __ z_bru(loop_start); 340 341 // Method exit, all arguments proocessed. 342 __ bind(loop_end); 343 __ z_lmg(Z_R10, Z_R13, frame::z_abi_160_size, Z_SP); // restore registers before frame is popped. 344 __ pop_frame(); 345 __ restore_return_pc(); 346 __ z_br(Z_R14); 347 348 // Copy int arguments. 349 350 Label iarg_caselist; // Distance between each case has to be a power of 2 351 // (= 1 << LogSizeOfCase). 352 __ align(16); 353 BIND(iarg_caselist); 354 __ z_lgr(Z_ARG3, intSlot); // 4 bytes 355 __ z_bru(loop_start_restore); // 4 bytes 356 357 __ z_lgr(Z_ARG4, intSlot); 358 __ z_bru(loop_start_restore); 359 360 __ z_lgr(Z_ARG5, intSlot); 361 __ z_bru(loop_start_restore); 362 363 __ align(16); 364 __ bind(move_intSlot_to_ARG); 365 __ z_stg(signature, d_signature, Z_SP); // Spill since signature == Z_R1_scratch. 366 __ z_larl(Z_R1_scratch, iarg_caselist); 367 __ z_sllg(Z_R0_scratch, argcnt, LogSizeOfCase); 368 __ add2reg(argcnt, 1); 369 __ z_agr(Z_R1_scratch, Z_R0_scratch); 370 __ z_bcr(Assembler::bcondAlways, Z_R1_scratch); 371 372 // Copy float arguments. 373 374 Label farg_caselist; // Distance between each case has to be a power of 2 375 // (= 1 << logSizeOfCase, padded with nop. 376 __ align(16); 377 BIND(farg_caselist); 378 __ z_ldr(Z_FARG1, floatSlot); // 2 bytes 379 __ z_bru(loop_start_restore); // 4 bytes 380 __ z_nop(); // 2 bytes 381 382 __ z_ldr(Z_FARG2, floatSlot); 383 __ z_bru(loop_start_restore); 384 __ z_nop(); 385 386 __ z_ldr(Z_FARG3, floatSlot); 387 __ z_bru(loop_start_restore); 388 __ z_nop(); 389 390 __ z_ldr(Z_FARG4, floatSlot); 391 __ z_bru(loop_start_restore); 392 __ z_nop(); 393 394 __ align(16); 395 __ bind(move_floatSlot_to_FARG); 396 __ z_stg(signature, d_signature, Z_SP); // Spill since signature == Z_R1_scratch. 397 __ z_lg(Z_R0_scratch, d_fpcnt, Z_SP); // Need old value for indexing. 398 __ add2mem_64(Address(Z_SP, d_fpcnt), 1, Z_R1_scratch); // Increment index. 399 __ z_larl(Z_R1_scratch, farg_caselist); 400 __ z_sllg(Z_R0_scratch, Z_R0_scratch, LogSizeOfCase); 401 __ z_agr(Z_R1_scratch, Z_R0_scratch); 402 __ z_bcr(Assembler::bcondAlways, Z_R1_scratch); 403 404 BLOCK_COMMENT("} slow_signature_handler"); 405 406 return __ addr_at(entry_offset); 407 } 408 409 address TemplateInterpreterGenerator::generate_result_handler_for (BasicType type) { 410 address entry = __ pc(); 411 412 assert(Z_tos == Z_RET, "Result handler: must move result!"); 413 assert(Z_ftos == Z_FRET, "Result handler: must move float result!"); 414 415 switch (type) { 416 case T_BOOLEAN: 417 __ c2bool(Z_tos); 418 break; 419 case T_CHAR: 420 __ and_imm(Z_tos, 0xffff); 421 break; 422 case T_BYTE: 423 __ z_lbr(Z_tos, Z_tos); 424 break; 425 case T_SHORT: 426 __ z_lhr(Z_tos, Z_tos); 427 break; 428 case T_INT: 429 case T_LONG: 430 case T_VOID: 431 case T_FLOAT: 432 case T_DOUBLE: 433 break; 434 case T_OBJECT: 435 // Retrieve result from frame... 436 __ mem2reg_opt(Z_tos, Address(Z_fp, oop_tmp_offset)); 437 // and verify it. 438 __ verify_oop(Z_tos); 439 break; 440 default: 441 ShouldNotReachHere(); 442 } 443 __ z_br(Z_R14); // Return from result handler. 444 return entry; 445 } 446 447 // Abstract method entry. 448 // Attempt to execute abstract method. Throw exception. 449 address TemplateInterpreterGenerator::generate_abstract_entry(void) { 450 unsigned int entry_offset = __ offset(); 451 452 // Caller could be the call_stub or a compiled method (x86 version is wrong!). 453 454 BLOCK_COMMENT("abstract_entry {"); 455 456 // Implement call of InterpreterRuntime::throw_AbstractMethodError. 457 __ set_top_ijava_frame_at_SP_as_last_Java_frame(Z_SP, Z_R1); 458 __ save_return_pc(); // Save Z_R14. 459 __ push_frame_abi160(0); // Without new frame the RT call could overwrite the saved Z_R14. 460 461 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError), Z_thread); 462 463 __ pop_frame(); 464 __ restore_return_pc(); // Restore Z_R14. 465 __ reset_last_Java_frame(); 466 467 // Restore caller sp for c2i case. 468 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. 469 470 // branch to SharedRuntime::generate_forward_exception() which handles all possible callers, 471 // i.e. call stub, compiled method, interpreted method. 472 __ load_absolute_address(Z_tmp_1, StubRoutines::forward_exception_entry()); 473 __ z_br(Z_tmp_1); 474 475 BLOCK_COMMENT("} abstract_entry"); 476 477 return __ addr_at(entry_offset); 478 } 479 480 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) { 481 #if INCLUDE_ALL_GCS 482 if (UseG1GC) { 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 __ load_heap_oop(pre_val, referent_offset, pre_val); 516 517 // Restore caller sp for c2i case. 518 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. 519 520 // Generate the G1 pre-barrier code to log the value of 521 // the referent field in an SATB buffer. 522 // Note: 523 // With these parameters the write_barrier_pre does not 524 // generate instructions to load the previous value. 525 __ g1_write_barrier_pre(noreg, // obj 526 noreg, // offset 527 pre_val, // pre_val 528 noreg, // no new val to preserve 529 scratch1, // tmp 530 scratch2, // tmp 531 true); // pre_val_needed 532 533 __ z_br(Z_R14); 534 535 // Branch to previously generated regular method entry. 536 __ bind(slow_path); 537 538 address meth_entry = Interpreter::entry_for_kind(Interpreter::zerolocals); 539 __ jump_to_entry(meth_entry, Z_R1); 540 541 BLOCK_COMMENT("} Reference_get"); 542 543 return entry; 544 } 545 #endif // INCLUDE_ALL_GCS 546 547 return NULL; 548 } 549 550 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { 551 address entry = __ pc(); 552 553 DEBUG_ONLY(__ verify_esp(Z_esp, Z_ARG5)); 554 555 // Restore bcp under the assumption that the current frame is still 556 // interpreted. 557 __ restore_bcp(); 558 559 // Expression stack must be empty before entering the VM if an 560 // exception happened. 561 __ empty_expression_stack(); 562 // Throw exception. 563 __ call_VM(noreg, 564 CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError)); 565 return entry; 566 } 567 568 // 569 // Args: 570 // Z_ARG3: aberrant index 571 // 572 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char * name) { 573 address entry = __ pc(); 574 address excp = CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException); 575 576 // Expression stack must be empty before entering the VM if an 577 // exception happened. 578 __ empty_expression_stack(); 579 580 // Setup parameters. 581 // Leave out the name and use register for array to create more detailed exceptions. 582 __ load_absolute_address(Z_ARG2, (address) name); 583 __ call_VM(noreg, excp, Z_ARG2, Z_ARG3); 584 return entry; 585 } 586 587 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { 588 address entry = __ pc(); 589 590 // Object is at TOS. 591 __ pop_ptr(Z_ARG2); 592 593 // Expression stack must be empty before entering the VM if an 594 // exception happened. 595 __ empty_expression_stack(); 596 597 __ call_VM(Z_ARG1, 598 CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ClassCastException), 599 Z_ARG2); 600 601 DEBUG_ONLY(__ should_not_reach_here();) 602 603 return entry; 604 } 605 606 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) { 607 assert(!pass_oop || message == NULL, "either oop or message but not both"); 608 address entry = __ pc(); 609 610 BLOCK_COMMENT("exception_handler_common {"); 611 612 // Expression stack must be empty before entering the VM if an 613 // exception happened. 614 __ empty_expression_stack(); 615 if (name != NULL) { 616 __ load_absolute_address(Z_ARG2, (address)name); 617 } else { 618 __ clear_reg(Z_ARG2, true, false); 619 } 620 621 if (pass_oop) { 622 __ call_VM(Z_tos, 623 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), 624 Z_ARG2, Z_tos /*object (see TT::aastore())*/); 625 } else { 626 if (message != NULL) { 627 __ load_absolute_address(Z_ARG3, (address)message); 628 } else { 629 __ clear_reg(Z_ARG3, true, false); 630 } 631 __ call_VM(Z_tos, 632 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), 633 Z_ARG2, Z_ARG3); 634 } 635 // Throw exception. 636 __ load_absolute_address(Z_R1_scratch, Interpreter::throw_exception_entry()); 637 __ z_br(Z_R1_scratch); 638 639 BLOCK_COMMENT("} exception_handler_common"); 640 641 return entry; 642 } 643 644 address TemplateInterpreterGenerator::generate_return_entry_for (TosState state, int step, size_t index_size) { 645 address entry = __ pc(); 646 647 BLOCK_COMMENT("return_entry {"); 648 649 // Pop i2c extension or revert top-2-parent-resize done by interpreted callees. 650 Register sp_before_i2c_extension = Z_bcp; 651 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer. 652 __ z_lg(sp_before_i2c_extension, Address(Z_fp, _z_ijava_state_neg(top_frame_sp))); 653 __ resize_frame_absolute(sp_before_i2c_extension, Z_locals/*tmp*/, true/*load_fp*/); 654 655 // TODO(ZASM): necessary?? 656 // // and NULL it as marker that esp is now tos until next java call 657 // __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 658 659 __ restore_bcp(); 660 __ restore_locals(); 661 __ restore_esp(); 662 663 if (state == atos) { 664 __ profile_return_type(Z_tmp_1, Z_tos, Z_tmp_2); 665 } 666 667 Register cache = Z_tmp_1; 668 Register size = Z_tmp_1; 669 Register offset = Z_tmp_2; 670 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() + 671 ConstantPoolCacheEntry::flags_offset()); 672 __ get_cache_and_index_at_bcp(cache, offset, 1, index_size); 673 674 // #args is in rightmost byte of the _flags field. 675 __ z_llgc(size, Address(cache, offset, flags_offset+(sizeof(size_t)-1))); 676 __ z_sllg(size, size, Interpreter::logStackElementSize); // Each argument size in bytes. 677 __ z_agr(Z_esp, size); // Pop arguments. 678 679 __ check_and_handle_popframe(Z_thread); 680 __ check_and_handle_earlyret(Z_thread); 681 682 __ dispatch_next(state, step); 683 684 BLOCK_COMMENT("} return_entry"); 685 686 return entry; 687 } 688 689 address TemplateInterpreterGenerator::generate_deopt_entry_for (TosState state, 690 int step, 691 address continuation) { 692 address entry = __ pc(); 693 694 BLOCK_COMMENT("deopt_entry {"); 695 696 // TODO(ZASM): necessary? NULL last_sp until next java call 697 // __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 698 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer. 699 __ restore_bcp(); 700 __ restore_locals(); 701 __ restore_esp(); 702 703 // Handle exceptions. 704 { 705 Label L; 706 __ load_and_test_long(Z_R0/*pending_exception*/, thread_(pending_exception)); 707 __ z_bre(L); 708 __ call_VM(noreg, 709 CAST_FROM_FN_PTR(address, 710 InterpreterRuntime::throw_pending_exception)); 711 __ should_not_reach_here(); 712 __ bind(L); 713 } 714 if (continuation == NULL) { 715 __ dispatch_next(state, step); 716 } else { 717 __ jump_to_entry(continuation, Z_R1_scratch); 718 } 719 720 BLOCK_COMMENT("} deopt_entry"); 721 722 return entry; 723 } 724 725 address TemplateInterpreterGenerator::generate_safept_entry_for (TosState state, 726 address runtime_entry) { 727 address entry = __ pc(); 728 __ push(state); 729 __ call_VM(noreg, runtime_entry); 730 __ dispatch_via(vtos, Interpreter::_normal_table.table_for (vtos)); 731 return entry; 732 } 733 734 // 735 // Helpers for commoning out cases in the various type of method entries. 736 // 737 738 // Increment invocation count & check for overflow. 739 // 740 // Note: checking for negative value instead of overflow 741 // so we have a 'sticky' overflow test. 742 // 743 // Z_ARG2: method (see generate_fixed_frame()) 744 // 745 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) { 746 Label done; 747 Register method = Z_ARG2; // Generate_fixed_frame() copies Z_method into Z_ARG2. 748 Register m_counters = Z_ARG4; 749 750 BLOCK_COMMENT("counter_incr {"); 751 752 // Note: In tiered we increment either counters in method or in MDO depending 753 // if we are profiling or not. 754 if (TieredCompilation) { 755 int increment = InvocationCounter::count_increment; 756 if (ProfileInterpreter) { 757 NearLabel no_mdo; 758 Register mdo = m_counters; 759 // Are we profiling? 760 __ load_and_test_long(mdo, method2_(method, method_data)); 761 __ branch_optimized(Assembler::bcondZero, no_mdo); 762 // Increment counter in the MDO. 763 const Address mdo_invocation_counter(mdo, MethodData::invocation_counter_offset() + 764 InvocationCounter::counter_offset()); 765 const Address mask(mdo, MethodData::invoke_mask_offset()); 766 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, 767 Z_R1_scratch, false, Assembler::bcondZero, 768 overflow); 769 __ z_bru(done); 770 __ bind(no_mdo); 771 } 772 773 // Increment counter in MethodCounters. 774 const Address invocation_counter(m_counters, 775 MethodCounters::invocation_counter_offset() + 776 InvocationCounter::counter_offset()); 777 // Get address of MethodCounters object. 778 __ get_method_counters(method, m_counters, done); 779 const Address mask(m_counters, MethodCounters::invoke_mask_offset()); 780 __ increment_mask_and_jump(invocation_counter, 781 increment, mask, 782 Z_R1_scratch, false, Assembler::bcondZero, 783 overflow); 784 } else { 785 Register counter_sum = Z_ARG3; // The result of this piece of code. 786 Register tmp = Z_R1_scratch; 787 #ifdef ASSERT 788 { 789 NearLabel ok; 790 __ get_method(tmp); 791 __ compare64_and_branch(method, tmp, Assembler::bcondEqual, ok); 792 __ z_illtrap(0x66); 793 __ bind(ok); 794 } 795 #endif 796 797 // Get address of MethodCounters object. 798 __ get_method_counters(method, m_counters, done); 799 // Update standard invocation counters. 800 __ increment_invocation_counter(m_counters, counter_sum); 801 if (ProfileInterpreter) { 802 __ add2mem_32(Address(m_counters, MethodCounters::interpreter_invocation_counter_offset()), 1, tmp); 803 if (profile_method != NULL) { 804 const Address profile_limit(m_counters, MethodCounters::interpreter_profile_limit_offset()); 805 __ z_cl(counter_sum, profile_limit); 806 __ branch_optimized(Assembler::bcondLow, *profile_method_continue); 807 // If no method data exists, go to profile_method. 808 __ test_method_data_pointer(tmp, *profile_method); 809 } 810 } 811 812 const Address invocation_limit(m_counters, MethodCounters::interpreter_invocation_limit_offset()); 813 __ z_cl(counter_sum, invocation_limit); 814 __ branch_optimized(Assembler::bcondNotLow, *overflow); 815 } 816 817 __ bind(done); 818 819 BLOCK_COMMENT("} counter_incr"); 820 } 821 822 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) { 823 // InterpreterRuntime::frequency_counter_overflow takes two 824 // arguments, the first (thread) is passed by call_VM, the second 825 // indicates if the counter overflow occurs at a backwards branch 826 // (NULL bcp). We pass zero for it. The call returns the address 827 // of the verified entry point for the method or NULL if the 828 // compilation did not complete (either went background or bailed 829 // out). 830 __ clear_reg(Z_ARG2); 831 __ call_VM(noreg, 832 CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), 833 Z_ARG2); 834 __ z_bru(do_continue); 835 } 836 837 void TemplateInterpreterGenerator::generate_stack_overflow_check(Register frame_size, Register tmp1) { 838 Register tmp2 = Z_R1_scratch; 839 const int page_size = os::vm_page_size(); 840 NearLabel after_frame_check; 841 842 BLOCK_COMMENT("counter_overflow {"); 843 844 assert_different_registers(frame_size, tmp1); 845 846 // Stack banging is sufficient overflow check if frame_size < page_size. 847 if (Immediate::is_uimm(page_size, 15)) { 848 __ z_chi(frame_size, page_size); 849 __ z_brl(after_frame_check); 850 } else { 851 __ load_const_optimized(tmp1, page_size); 852 __ compareU32_and_branch(frame_size, tmp1, Assembler::bcondLow, after_frame_check); 853 } 854 855 // Get the stack base, and in debug, verify it is non-zero. 856 __ z_lg(tmp1, thread_(stack_base)); 857 #ifdef ASSERT 858 address reentry = NULL; 859 NearLabel base_not_zero; 860 __ compareU64_and_branch(tmp1, (intptr_t)0L, Assembler::bcondNotEqual, base_not_zero); 861 reentry = __ stop_chain_static(reentry, "stack base is zero in generate_stack_overflow_check"); 862 __ bind(base_not_zero); 863 #endif 864 865 // Get the stack size, and in debug, verify it is non-zero. 866 assert(sizeof(size_t) == sizeof(intptr_t), "wrong load size"); 867 __ z_lg(tmp2, thread_(stack_size)); 868 #ifdef ASSERT 869 NearLabel size_not_zero; 870 __ compareU64_and_branch(tmp2, (intptr_t)0L, Assembler::bcondNotEqual, size_not_zero); 871 reentry = __ stop_chain_static(reentry, "stack size is zero in generate_stack_overflow_check"); 872 __ bind(size_not_zero); 873 #endif 874 875 // Compute the beginning of the protected zone minus the requested frame size. 876 __ z_sgr(tmp1, tmp2); 877 __ add2reg(tmp1, JavaThread::stack_guard_zone_size()); 878 879 // Add in the size of the frame (which is the same as subtracting it from the 880 // SP, which would take another register. 881 __ z_agr(tmp1, frame_size); 882 883 // The frame is greater than one page in size, so check against 884 // the bottom of the stack. 885 __ compareU64_and_branch(Z_SP, tmp1, Assembler::bcondHigh, after_frame_check); 886 887 // The stack will overflow, throw an exception. 888 889 // Restore SP to sender's sp. This is necessary if the sender's frame is an 890 // extended compiled frame (see gen_c2i_adapter()) and safer anyway in case of 891 // JSR292 adaptations. 892 __ resize_frame_absolute(Z_R10, tmp1, true/*load_fp*/); 893 894 // Note also that the restored frame is not necessarily interpreted. 895 // Use the shared runtime version of the StackOverflowError. 896 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated"); 897 AddressLiteral stub(StubRoutines::throw_StackOverflowError_entry()); 898 __ load_absolute_address(tmp1, StubRoutines::throw_StackOverflowError_entry()); 899 __ z_br(tmp1); 900 901 // If you get to here, then there is enough stack space. 902 __ bind(after_frame_check); 903 904 BLOCK_COMMENT("} counter_overflow"); 905 } 906 907 // Allocate monitor and lock method (asm interpreter). 908 // 909 // Args: 910 // Z_locals: locals 911 912 void TemplateInterpreterGenerator::lock_method(void) { 913 914 BLOCK_COMMENT("lock_method {"); 915 916 // Synchronize method. 917 const Register method = Z_tmp_2; 918 __ get_method(method); 919 920 #ifdef ASSERT 921 address reentry = NULL; 922 { 923 Label L; 924 __ testbit(method2_(method, access_flags), JVM_ACC_SYNCHRONIZED_BIT); 925 __ z_btrue(L); 926 reentry = __ stop_chain_static(reentry, "method doesn't need synchronization"); 927 __ bind(L); 928 } 929 #endif // ASSERT 930 931 // Get synchronization object. 932 const Register object = Z_tmp_2; 933 934 { 935 Label done; 936 Label static_method; 937 938 __ testbit(method2_(method, access_flags), JVM_ACC_STATIC_BIT); 939 __ z_btrue(static_method); 940 941 // non-static method: Load receiver obj from stack. 942 __ mem2reg_opt(object, Address(Z_locals, Interpreter::local_offset_in_bytes(0))); 943 __ z_bru(done); 944 945 __ bind(static_method); 946 947 // Lock the java mirror. 948 __ load_mirror(object, method); 949 #ifdef ASSERT 950 { 951 NearLabel L; 952 __ compare64_and_branch(object, (intptr_t) 0, Assembler::bcondNotEqual, L); 953 reentry = __ stop_chain_static(reentry, "synchronization object is NULL"); 954 __ bind(L); 955 } 956 #endif // ASSERT 957 958 __ bind(done); 959 } 960 961 __ add_monitor_to_stack(true, Z_ARG3, Z_ARG4, Z_ARG5); // Allocate monitor elem. 962 // Store object and lock it. 963 __ get_monitors(Z_tmp_1); 964 __ reg2mem_opt(object, Address(Z_tmp_1, BasicObjectLock::obj_offset_in_bytes())); 965 __ lock_object(Z_tmp_1, object); 966 967 BLOCK_COMMENT("} lock_method"); 968 } 969 970 // Generate a fixed interpreter frame. This is identical setup for 971 // interpreted methods and for native methods hence the shared code. 972 // 973 // Registers alive 974 // Z_thread - JavaThread* 975 // Z_SP - old stack pointer 976 // Z_method - callee's method 977 // Z_esp - parameter list (slot 'above' last param) 978 // Z_R14 - return pc, to be stored in caller's frame 979 // Z_R10 - sender sp, note: Z_tmp_1 is Z_R10! 980 // 981 // Registers updated 982 // Z_SP - new stack pointer 983 // Z_esp - callee's operand stack pointer 984 // points to the slot above the value on top 985 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord) 986 // Z_bcp - the bytecode pointer 987 // Z_fp - the frame pointer, thereby killing Z_method 988 // Z_ARG2 - copy of Z_method 989 // 990 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { 991 992 // stack layout 993 // 994 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (see note below) 995 // [F1's operand stack (unused)] 996 // [F1's outgoing Java arguments] <-- Z_esp 997 // [F1's operand stack (non args)] 998 // [monitors] (optional) 999 // [IJAVA_STATE] 1000 // 1001 // F2 [PARENT_IJAVA_FRAME_ABI] 1002 // ... 1003 // 1004 // 0x000 1005 // 1006 // Note: Z_R10, the sender sp, will be below Z_SP if F1 was extended by a c2i adapter. 1007 1008 //============================================================================= 1009 // Allocate space for locals other than the parameters, the 1010 // interpreter state, monitors, and the expression stack. 1011 1012 const Register local_count = Z_ARG5; 1013 const Register fp = Z_tmp_2; 1014 1015 BLOCK_COMMENT("generate_fixed_frame {"); 1016 1017 { 1018 // local registers 1019 const Register top_frame_size = Z_ARG2; 1020 const Register sp_after_resize = Z_ARG3; 1021 const Register max_stack = Z_ARG4; 1022 1023 // local_count = method->constMethod->max_locals(); 1024 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset())); 1025 __ z_llgh(local_count, Address(Z_R1_scratch, ConstMethod::size_of_locals_offset())); 1026 1027 if (native_call) { 1028 // If we're calling a native method, we replace max_stack (which is 1029 // zero) with space for the worst-case signature handler varargs 1030 // vector, which is: 1031 // max_stack = max(Argument::n_register_parameters, parameter_count+2); 1032 // 1033 // We add two slots to the parameter_count, one for the jni 1034 // environment and one for a possible native mirror. We allocate 1035 // space for at least the number of ABI registers, even though 1036 // InterpreterRuntime::slow_signature_handler won't write more than 1037 // parameter_count+2 words when it creates the varargs vector at the 1038 // top of the stack. The generated slow signature handler will just 1039 // load trash into registers beyond the necessary number. We're 1040 // still going to cut the stack back by the ABI register parameter 1041 // count so as to get SP+16 pointing at the ABI outgoing parameter 1042 // area, so we need to allocate at least that much even though we're 1043 // going to throw it away. 1044 // 1045 1046 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset())); 1047 __ z_llgh(max_stack, Address(Z_R1_scratch, ConstMethod::size_of_parameters_offset())); 1048 __ add2reg(max_stack, 2); 1049 1050 NearLabel passing_args_on_stack; 1051 1052 // max_stack in bytes 1053 __ z_sllg(max_stack, max_stack, LogBytesPerWord); 1054 1055 int argument_registers_in_bytes = Argument::n_register_parameters << LogBytesPerWord; 1056 __ compare64_and_branch(max_stack, argument_registers_in_bytes, Assembler::bcondNotLow, passing_args_on_stack); 1057 1058 __ load_const_optimized(max_stack, argument_registers_in_bytes); 1059 1060 __ bind(passing_args_on_stack); 1061 } else { 1062 // !native_call 1063 __ z_lg(max_stack, method_(const)); 1064 1065 // Calculate number of non-parameter locals (in slots): 1066 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset())); 1067 __ z_sh(local_count, Address(Z_R1_scratch, ConstMethod::size_of_parameters_offset())); 1068 1069 // max_stack = method->max_stack(); 1070 __ z_llgh(max_stack, Address(max_stack, ConstMethod::max_stack_offset())); 1071 // max_stack in bytes 1072 __ z_sllg(max_stack, max_stack, LogBytesPerWord); 1073 } 1074 1075 // Resize (i.e. normally shrink) the top frame F1 ... 1076 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 1077 // F1's operand stack (free) 1078 // ... 1079 // F1's operand stack (free) <-- Z_esp 1080 // F1's outgoing Java arg m 1081 // ... 1082 // F1's outgoing Java arg 0 1083 // ... 1084 // 1085 // ... into a parent frame (Z_R10 holds F1's SP before any modification, see also above) 1086 // 1087 // +......................+ 1088 // : : <-- Z_R10, saved below as F0's z_ijava_state.sender_sp 1089 // : : 1090 // F1 [PARENT_IJAVA_FRAME_ABI] <-- Z_SP \ 1091 // F0's non arg local | = delta 1092 // ... | 1093 // F0's non arg local <-- Z_esp / 1094 // F1's outgoing Java arg m 1095 // ... 1096 // F1's outgoing Java arg 0 1097 // ... 1098 // 1099 // then push the new top frame F0. 1100 // 1101 // F0 [TOP_IJAVA_FRAME_ABI] = frame::z_top_ijava_frame_abi_size \ 1102 // [operand stack] = max_stack | = top_frame_size 1103 // [IJAVA_STATE] = frame::z_ijava_state_size / 1104 1105 // sp_after_resize = Z_esp - delta 1106 // 1107 // delta = PARENT_IJAVA_FRAME_ABI + (locals_count - params_count) 1108 1109 __ add2reg(sp_after_resize, (Interpreter::stackElementSize) - (frame::z_parent_ijava_frame_abi_size), Z_esp); 1110 __ z_sllg(Z_R0_scratch, local_count, LogBytesPerWord); // Params have already been subtracted from local_count. 1111 __ z_slgr(sp_after_resize, Z_R0_scratch); 1112 1113 // top_frame_size = TOP_IJAVA_FRAME_ABI + max_stack + size of interpreter state 1114 __ add2reg(top_frame_size, 1115 frame::z_top_ijava_frame_abi_size + 1116 frame::z_ijava_state_size + 1117 frame::interpreter_frame_monitor_size() * wordSize, 1118 max_stack); 1119 1120 if (!native_call) { 1121 // Stack overflow check. 1122 // Native calls don't need the stack size check since they have no 1123 // expression stack and the arguments are already on the stack and 1124 // we only add a handful of words to the stack. 1125 Register frame_size = max_stack; // Reuse the regiser for max_stack. 1126 __ z_lgr(frame_size, Z_SP); 1127 __ z_sgr(frame_size, sp_after_resize); 1128 __ z_agr(frame_size, top_frame_size); 1129 generate_stack_overflow_check(frame_size, fp/*tmp1*/); 1130 } 1131 1132 DEBUG_ONLY(__ z_cg(Z_R14, _z_abi16(return_pc), Z_SP)); 1133 __ asm_assert_eq("killed Z_R14", 0); 1134 __ resize_frame_absolute(sp_after_resize, fp, true); 1135 __ save_return_pc(Z_R14); 1136 1137 // ... and push the new frame F0. 1138 __ push_frame(top_frame_size, fp, true /*copy_sp*/, false); 1139 } 1140 1141 //============================================================================= 1142 // Initialize the new frame F0: initialize interpreter state. 1143 1144 { 1145 // locals 1146 const Register local_addr = Z_ARG4; 1147 1148 BLOCK_COMMENT("generate_fixed_frame: initialize interpreter state {"); 1149 1150 #ifdef ASSERT 1151 // Set the magic number (using local_addr as tmp register). 1152 __ load_const_optimized(local_addr, frame::z_istate_magic_number); 1153 __ z_stg(local_addr, _z_ijava_state_neg(magic), fp); 1154 #endif 1155 1156 // Save sender SP from F1 (i.e. before it was potentially modified by an 1157 // adapter) into F0's interpreter state. We us it as well to revert 1158 // resizing the frame above. 1159 __ z_stg(Z_R10, _z_ijava_state_neg(sender_sp), fp); 1160 1161 // Load cp cache and save it at the and of this block. 1162 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset())); 1163 __ z_lg(Z_R1_scratch, Address(Z_R1_scratch, ConstMethod::constants_offset())); 1164 __ z_lg(Z_R1_scratch, Address(Z_R1_scratch, ConstantPool::cache_offset_in_bytes())); 1165 1166 // z_ijava_state->method = method; 1167 __ z_stg(Z_method, _z_ijava_state_neg(method), fp); 1168 1169 // Point locals at the first argument. Method's locals are the 1170 // parameters on top of caller's expression stack. 1171 // Tos points past last Java argument. 1172 1173 __ z_lg(Z_locals, Address(Z_method, Method::const_offset())); 1174 __ z_llgh(Z_locals /*parameter_count words*/, 1175 Address(Z_locals, ConstMethod::size_of_parameters_offset())); 1176 __ z_sllg(Z_locals /*parameter_count bytes*/, Z_locals /*parameter_count*/, LogBytesPerWord); 1177 __ z_agr(Z_locals, Z_esp); 1178 // z_ijava_state->locals - i*BytesPerWord points to i-th Java local (i starts at 0) 1179 // z_ijava_state->locals = Z_esp + parameter_count bytes 1180 __ z_stg(Z_locals, _z_ijava_state_neg(locals), fp); 1181 1182 // z_ijava_state->oop_temp = NULL; 1183 __ store_const(Address(fp, oop_tmp_offset), 0); 1184 1185 // Initialize z_ijava_state->mdx. 1186 Register Rmdp = Z_bcp; 1187 // native_call: assert that mdo == NULL 1188 const bool check_for_mdo = !native_call DEBUG_ONLY(|| native_call); 1189 if (ProfileInterpreter && check_for_mdo) { 1190 Label get_continue; 1191 1192 __ load_and_test_long(Rmdp, method_(method_data)); 1193 __ z_brz(get_continue); 1194 DEBUG_ONLY(if (native_call) __ stop("native methods don't have a mdo")); 1195 __ add2reg(Rmdp, in_bytes(MethodData::data_offset())); 1196 __ bind(get_continue); 1197 } 1198 __ z_stg(Rmdp, _z_ijava_state_neg(mdx), fp); 1199 1200 // Initialize z_ijava_state->bcp and Z_bcp. 1201 if (native_call) { 1202 __ clear_reg(Z_bcp); // Must initialize. Will get written into frame where GC reads it. 1203 } else { 1204 __ z_lg(Z_bcp, method_(const)); 1205 __ add2reg(Z_bcp, in_bytes(ConstMethod::codes_offset())); 1206 } 1207 __ z_stg(Z_bcp, _z_ijava_state_neg(bcp), fp); 1208 1209 // no monitors and empty operand stack 1210 // => z_ijava_state->monitors points to the top slot in IJAVA_STATE. 1211 // => Z_ijava_state->esp points one slot above into the operand stack. 1212 // z_ijava_state->monitors = fp - frame::z_ijava_state_size - Interpreter::stackElementSize; 1213 // z_ijava_state->esp = Z_esp = z_ijava_state->monitors; 1214 __ add2reg(Z_esp, -frame::z_ijava_state_size, fp); 1215 __ z_stg(Z_esp, _z_ijava_state_neg(monitors), fp); 1216 __ add2reg(Z_esp, -Interpreter::stackElementSize); 1217 __ z_stg(Z_esp, _z_ijava_state_neg(esp), fp); 1218 1219 // z_ijava_state->cpoolCache = Z_R1_scratch (see load above); 1220 __ z_stg(Z_R1_scratch, _z_ijava_state_neg(cpoolCache), fp); 1221 1222 // Get mirror and store it in the frame as GC root for this Method*. 1223 __ load_mirror(Z_R1_scratch, Z_method); 1224 __ z_stg(Z_R1_scratch, _z_ijava_state_neg(mirror), fp); 1225 1226 BLOCK_COMMENT("} generate_fixed_frame: initialize interpreter state"); 1227 1228 //============================================================================= 1229 if (!native_call) { 1230 // Fill locals with 0x0s. 1231 NearLabel locals_zeroed; 1232 NearLabel doXC; 1233 1234 // Local_count is already num_locals_slots - num_param_slots. 1235 __ compare64_and_branch(local_count, (intptr_t)0L, Assembler::bcondNotHigh, locals_zeroed); 1236 1237 // Advance local_addr to point behind locals (creates positive incr. in loop). 1238 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset())); 1239 __ z_llgh(Z_R0_scratch, Address(Z_R1_scratch, ConstMethod::size_of_locals_offset())); 1240 __ add2reg(Z_R0_scratch, -1); 1241 1242 __ z_lgr(local_addr/*locals*/, Z_locals); 1243 __ z_sllg(Z_R0_scratch, Z_R0_scratch, LogBytesPerWord); 1244 __ z_sllg(local_count, local_count, LogBytesPerWord); // Local_count are non param locals. 1245 __ z_sgr(local_addr, Z_R0_scratch); 1246 1247 if (VM_Version::has_Prefetch()) { 1248 __ z_pfd(0x02, 0, Z_R0, local_addr); 1249 __ z_pfd(0x02, 256, Z_R0, local_addr); 1250 } 1251 1252 // Can't optimise for Z10 using "compare and branch" (immediate value is too big). 1253 __ z_cghi(local_count, 256); 1254 __ z_brnh(doXC); 1255 1256 // MVCLE: Initialize if quite a lot locals. 1257 // __ bind(doMVCLE); 1258 __ z_lgr(Z_R0_scratch, local_addr); 1259 __ z_lgr(Z_R1_scratch, local_count); 1260 __ clear_reg(Z_ARG2); // Src len of MVCLE is zero. 1261 1262 __ MacroAssembler::move_long_ext(Z_R0_scratch, Z_ARG1, 0); 1263 __ z_bru(locals_zeroed); 1264 1265 Label XC_template; 1266 __ bind(XC_template); 1267 __ z_xc(0, 0, local_addr, 0, local_addr); 1268 1269 __ bind(doXC); 1270 __ z_bctgr(local_count, Z_R0); // Get #bytes-1 for EXECUTE. 1271 if (VM_Version::has_ExecuteExtensions()) { 1272 __ z_exrl(local_count, XC_template); // Execute XC with variable length. 1273 } else { 1274 __ z_larl(Z_R1_scratch, XC_template); 1275 __ z_ex(local_count, 0, Z_R0, Z_R1_scratch); // Execute XC with variable length. 1276 } 1277 1278 __ bind(locals_zeroed); 1279 } 1280 1281 } 1282 // Finally set the frame pointer, destroying Z_method. 1283 assert(Z_fp == Z_method, "maybe set Z_fp earlier if other register than Z_method"); 1284 // Oprofile analysis suggests to keep a copy in a register to be used by 1285 // generate_counter_incr(). 1286 __ z_lgr(Z_ARG2, Z_method); 1287 __ z_lgr(Z_fp, fp); 1288 1289 BLOCK_COMMENT("} generate_fixed_frame"); 1290 } 1291 1292 // Various method entries 1293 1294 // Math function, frame manager must set up an interpreter state, etc. 1295 address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) { 1296 1297 // Decide what to do: Use same platform specific instructions and runtime calls as compilers. 1298 bool use_instruction = false; 1299 address runtime_entry = NULL; 1300 int num_args = 1; 1301 bool double_precision = true; 1302 1303 // s390 specific: 1304 switch (kind) { 1305 case Interpreter::java_lang_math_sqrt: 1306 case Interpreter::java_lang_math_abs: use_instruction = true; break; 1307 case Interpreter::java_lang_math_fmaF: 1308 case Interpreter::java_lang_math_fmaD: use_instruction = UseFMA; break; 1309 default: break; // Fall back to runtime call. 1310 } 1311 1312 switch (kind) { 1313 case Interpreter::java_lang_math_sin : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsin); break; 1314 case Interpreter::java_lang_math_cos : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dcos); break; 1315 case Interpreter::java_lang_math_tan : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dtan); break; 1316 case Interpreter::java_lang_math_abs : /* run interpreted */ break; 1317 case Interpreter::java_lang_math_sqrt : /* runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsqrt); not available */ break; 1318 case Interpreter::java_lang_math_log : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog); break; 1319 case Interpreter::java_lang_math_log10: runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10); break; 1320 case Interpreter::java_lang_math_pow : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dpow); num_args = 2; break; 1321 case Interpreter::java_lang_math_exp : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dexp); break; 1322 case Interpreter::java_lang_math_fmaF : /* run interpreted */ num_args = 3; double_precision = false; break; 1323 case Interpreter::java_lang_math_fmaD : /* run interpreted */ num_args = 3; break; 1324 default: ShouldNotReachHere(); 1325 } 1326 1327 // Use normal entry if neither instruction nor runtime call is used. 1328 if (!use_instruction && runtime_entry == NULL) return NULL; 1329 1330 address entry = __ pc(); 1331 1332 if (use_instruction) { 1333 switch (kind) { 1334 case Interpreter::java_lang_math_sqrt: 1335 // Can use memory operand directly. 1336 __ z_sqdb(Z_FRET, Interpreter::stackElementSize, Z_esp); 1337 break; 1338 case Interpreter::java_lang_math_abs: 1339 // Load operand from stack. 1340 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); 1341 __ z_lpdbr(Z_FRET); 1342 break; 1343 case Interpreter::java_lang_math_fmaF: 1344 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); // result reg = arg3 1345 __ mem2freg_opt(Z_FARG2, Address(Z_esp, 3 * Interpreter::stackElementSize)); // arg1 1346 __ z_maeb(Z_FRET, Z_FARG2, Address(Z_esp, 2 * Interpreter::stackElementSize)); 1347 break; 1348 case Interpreter::java_lang_math_fmaD: 1349 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); // result reg = arg3 1350 __ mem2freg_opt(Z_FARG2, Address(Z_esp, 5 * Interpreter::stackElementSize)); // arg1 1351 __ z_madb(Z_FRET, Z_FARG2, Address(Z_esp, 3 * Interpreter::stackElementSize)); 1352 break; 1353 default: ShouldNotReachHere(); 1354 } 1355 } else { 1356 // Load arguments 1357 assert(num_args <= 4, "passed in registers"); 1358 if (double_precision) { 1359 int offset = (2 * num_args - 1) * Interpreter::stackElementSize; 1360 for (int i = 0; i < num_args; ++i) { 1361 __ mem2freg_opt(as_FloatRegister(Z_FARG1->encoding() + 2 * i), Address(Z_esp, offset)); 1362 offset -= 2 * Interpreter::stackElementSize; 1363 } 1364 } else { 1365 int offset = num_args * Interpreter::stackElementSize; 1366 for (int i = 0; i < num_args; ++i) { 1367 __ mem2freg_opt(as_FloatRegister(Z_FARG1->encoding() + 2 * i), Address(Z_esp, offset)); 1368 offset -= Interpreter::stackElementSize; 1369 } 1370 } 1371 // Call runtime 1372 __ save_return_pc(); // Save Z_R14. 1373 __ push_frame_abi160(0); // Without new frame the RT call could overwrite the saved Z_R14. 1374 1375 __ call_VM_leaf(runtime_entry); 1376 1377 __ pop_frame(); 1378 __ restore_return_pc(); // Restore Z_R14. 1379 } 1380 1381 // Pop c2i arguments (if any) off when we return. 1382 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. 1383 1384 __ z_br(Z_R14); 1385 1386 return entry; 1387 } 1388 1389 // Interpreter stub for calling a native method. (asm interpreter). 1390 // This sets up a somewhat different looking stack for calling the 1391 // native method than the typical interpreter frame setup. 1392 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) { 1393 // Determine code generation flags. 1394 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 1395 1396 // Interpreter entry for ordinary Java methods. 1397 // 1398 // Registers alive 1399 // Z_SP - stack pointer 1400 // Z_thread - JavaThread* 1401 // Z_method - callee's method (method to be invoked) 1402 // Z_esp - operand (or expression) stack pointer of caller. one slot above last arg. 1403 // Z_R10 - sender sp (before modifications, e.g. by c2i adapter 1404 // and as well by generate_fixed_frame below) 1405 // Z_R14 - return address to caller (call_stub or c2i_adapter) 1406 // 1407 // Registers updated 1408 // Z_SP - stack pointer 1409 // Z_fp - callee's framepointer 1410 // Z_esp - callee's operand stack pointer 1411 // points to the slot above the value on top 1412 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord) 1413 // Z_tos - integer result, if any 1414 // z_ftos - floating point result, if any 1415 // 1416 // Stack layout at this point: 1417 // 1418 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (Z_R10 will be below Z_SP if 1419 // frame was extended by c2i adapter) 1420 // [outgoing Java arguments] <-- Z_esp 1421 // ... 1422 // PARENT [PARENT_IJAVA_FRAME_ABI] 1423 // ... 1424 // 1425 1426 address entry_point = __ pc(); 1427 1428 // Make sure registers are different! 1429 assert_different_registers(Z_thread, Z_method, Z_esp); 1430 1431 BLOCK_COMMENT("native_entry {"); 1432 1433 // Make sure method is native and not abstract. 1434 #ifdef ASSERT 1435 address reentry = NULL; 1436 { Label L; 1437 __ testbit(method_(access_flags), JVM_ACC_NATIVE_BIT); 1438 __ z_btrue(L); 1439 reentry = __ stop_chain_static(reentry, "tried to execute non-native method as native"); 1440 __ bind(L); 1441 } 1442 { Label L; 1443 __ testbit(method_(access_flags), JVM_ACC_ABSTRACT_BIT); 1444 __ z_bfalse(L); 1445 reentry = __ stop_chain_static(reentry, "tried to execute abstract method as non-abstract"); 1446 __ bind(L); 1447 } 1448 #endif // ASSERT 1449 1450 #ifdef ASSERT 1451 // Save the return PC into the callers frame for assertion in generate_fixed_frame. 1452 __ save_return_pc(Z_R14); 1453 #endif 1454 1455 // Generate the code to allocate the interpreter stack frame. 1456 generate_fixed_frame(true); 1457 1458 const Address do_not_unlock_if_synchronized(Z_thread, JavaThread::do_not_unlock_if_synchronized_offset()); 1459 // Since at this point in the method invocation the exception handler 1460 // would try to exit the monitor of synchronized methods which hasn't 1461 // been entered yet, we set the thread local variable 1462 // _do_not_unlock_if_synchronized to true. If any exception was thrown by 1463 // runtime, exception handling i.e. unlock_if_synchronized_method will 1464 // check this thread local flag. 1465 __ z_mvi(do_not_unlock_if_synchronized, true); 1466 1467 // Increment invocation count and check for overflow. 1468 NearLabel invocation_counter_overflow; 1469 if (inc_counter) { 1470 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); 1471 } 1472 1473 Label continue_after_compile; 1474 __ bind(continue_after_compile); 1475 1476 bang_stack_shadow_pages(true); 1477 1478 // Reset the _do_not_unlock_if_synchronized flag. 1479 __ z_mvi(do_not_unlock_if_synchronized, false); 1480 1481 // Check for synchronized methods. 1482 // This mst happen AFTER invocation_counter check and stack overflow check, 1483 // so method is not locked if overflows. 1484 if (synchronized) { 1485 lock_method(); 1486 } else { 1487 // No synchronization necessary. 1488 #ifdef ASSERT 1489 { Label L; 1490 __ get_method(Z_R1_scratch); 1491 __ testbit(method2_(Z_R1_scratch, access_flags), JVM_ACC_SYNCHRONIZED_BIT); 1492 __ z_bfalse(L); 1493 reentry = __ stop_chain_static(reentry, "method needs synchronization"); 1494 __ bind(L); 1495 } 1496 #endif // ASSERT 1497 } 1498 1499 // start execution 1500 1501 // jvmti support 1502 __ notify_method_entry(); 1503 1504 //============================================================================= 1505 // Get and call the signature handler. 1506 const Register Rmethod = Z_tmp_2; 1507 const Register signature_handler_entry = Z_tmp_1; 1508 const Register Rresult_handler = Z_tmp_3; 1509 Label call_signature_handler; 1510 1511 assert_different_registers(Z_fp, Rmethod, signature_handler_entry, Rresult_handler); 1512 assert(Rresult_handler->is_nonvolatile(), "Rresult_handler must be in a non-volatile register"); 1513 1514 // Reload method. 1515 __ get_method(Rmethod); 1516 1517 // Check for signature handler. 1518 __ load_and_test_long(signature_handler_entry, method2_(Rmethod, signature_handler)); 1519 __ z_brne(call_signature_handler); 1520 1521 // Method has never been called. Either generate a specialized 1522 // handler or point to the slow one. 1523 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), 1524 Rmethod); 1525 1526 // Reload method. 1527 __ get_method(Rmethod); 1528 1529 // Reload signature handler, it must have been created/assigned in the meantime. 1530 __ z_lg(signature_handler_entry, method2_(Rmethod, signature_handler)); 1531 1532 __ bind(call_signature_handler); 1533 1534 // We have a TOP_IJAVA_FRAME here, which belongs to us. 1535 __ set_top_ijava_frame_at_SP_as_last_Java_frame(Z_SP, Z_R1/*tmp*/); 1536 1537 // Call signature handler and pass locals address in Z_ARG1. 1538 __ z_lgr(Z_ARG1, Z_locals); 1539 __ call_stub(signature_handler_entry); 1540 // Save result handler returned by signature handler. 1541 __ z_lgr(Rresult_handler, Z_RET); 1542 1543 // Reload method (the slow signature handler may block for GC). 1544 __ get_method(Rmethod); 1545 1546 // Pass mirror handle if static call. 1547 { 1548 Label method_is_not_static; 1549 __ testbit(method2_(Rmethod, access_flags), JVM_ACC_STATIC_BIT); 1550 __ z_bfalse(method_is_not_static); 1551 // Get mirror. 1552 __ load_mirror(Z_R1, Rmethod); 1553 // z_ijava_state.oop_temp = pool_holder->klass_part()->java_mirror(); 1554 __ z_stg(Z_R1, oop_tmp_offset, Z_fp); 1555 // Pass handle to mirror as 2nd argument to JNI method. 1556 __ add2reg(Z_ARG2, oop_tmp_offset, Z_fp); 1557 __ bind(method_is_not_static); 1558 } 1559 1560 // Pass JNIEnv address as first parameter. 1561 __ add2reg(Z_ARG1, in_bytes(JavaThread::jni_environment_offset()), Z_thread); 1562 1563 // Note: last java frame has been set above already. The pc from there 1564 // is precise enough. 1565 1566 // Get native function entry point before we change the thread state. 1567 __ z_lg(Z_R1/*native_method_entry*/, method2_(Rmethod, native_function)); 1568 1569 //============================================================================= 1570 // Transition from _thread_in_Java to _thread_in_native. As soon as 1571 // we make this change the safepoint code needs to be certain that 1572 // the last Java frame we established is good. The pc in that frame 1573 // just need to be near here not an actual return address. 1574 #ifdef ASSERT 1575 { 1576 NearLabel L; 1577 __ mem2reg_opt(Z_R14, Address(Z_thread, JavaThread::thread_state_offset()), false /*32 bits*/); 1578 __ compareU32_and_branch(Z_R14, _thread_in_Java, Assembler::bcondEqual, L); 1579 reentry = __ stop_chain_static(reentry, "Wrong thread state in native stub"); 1580 __ bind(L); 1581 } 1582 #endif 1583 1584 // Memory ordering: Z does not reorder store/load with subsequent load. That's strong enough. 1585 __ set_thread_state(_thread_in_native); 1586 1587 //============================================================================= 1588 // Call the native method. Argument registers must not have been 1589 // overwritten since "__ call_stub(signature_handler);" (except for 1590 // ARG1 and ARG2 for static methods). 1591 1592 __ call_c(Z_R1/*native_method_entry*/); 1593 1594 // NOTE: frame::interpreter_frame_result() depends on these stores. 1595 __ z_stg(Z_RET, _z_ijava_state_neg(lresult), Z_fp); 1596 __ freg2mem_opt(Z_FRET, Address(Z_fp, _z_ijava_state_neg(fresult))); 1597 const Register Rlresult = signature_handler_entry; 1598 assert(Rlresult->is_nonvolatile(), "Rlresult must be in a non-volatile register"); 1599 __ z_lgr(Rlresult, Z_RET); 1600 1601 // Z_method may no longer be valid, because of GC. 1602 1603 // Block, if necessary, before resuming in _thread_in_Java state. 1604 // In order for GC to work, don't clear the last_Java_sp until after 1605 // blocking. 1606 1607 //============================================================================= 1608 // Switch thread to "native transition" state before reading the 1609 // synchronization state. This additional state is necessary 1610 // because reading and testing the synchronization state is not 1611 // atomic w.r.t. GC, as this scenario demonstrates: Java thread A, 1612 // in _thread_in_native state, loads _not_synchronized and is 1613 // preempted. VM thread changes sync state to synchronizing and 1614 // suspends threads for GC. Thread A is resumed to finish this 1615 // native method, but doesn't block here since it didn't see any 1616 // synchronization is progress, and escapes. 1617 1618 __ set_thread_state(_thread_in_native_trans); 1619 if (UseMembar) { 1620 __ z_fence(); 1621 } else { 1622 // Write serialization page so VM thread can do a pseudo remote 1623 // membar. We use the current thread pointer to calculate a thread 1624 // specific offset to write to within the page. This minimizes bus 1625 // traffic due to cache line collision. 1626 __ serialize_memory(Z_thread, Z_R1, Z_R0); 1627 } 1628 // Now before we return to java we must look for a current safepoint 1629 // (a new safepoint can not start since we entered native_trans). 1630 // We must check here because a current safepoint could be modifying 1631 // the callers registers right this moment. 1632 1633 // Check for safepoint operation in progress and/or pending suspend requests. 1634 { 1635 Label Continue, do_safepoint; 1636 __ safepoint_poll(do_safepoint, Z_R1); 1637 // Check for suspend. 1638 __ load_and_test_int(Z_R0/*suspend_flags*/, thread_(suspend_flags)); 1639 __ z_bre(Continue); // 0 -> no flag set -> not suspended 1640 __ bind(do_safepoint); 1641 __ z_lgr(Z_ARG1, Z_thread); 1642 __ call_c(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)); 1643 __ bind(Continue); 1644 } 1645 1646 //============================================================================= 1647 // Back in Interpreter Frame. 1648 1649 // We are in thread_in_native_trans here and back in the normal 1650 // interpreter frame. We don't have to do anything special about 1651 // safepoints and we can switch to Java mode anytime we are ready. 1652 1653 // Note: frame::interpreter_frame_result has a dependency on how the 1654 // method result is saved across the call to post_method_exit. For 1655 // native methods it assumes that the non-FPU/non-void result is 1656 // saved in z_ijava_state.lresult and a FPU result in z_ijava_state.fresult. If 1657 // this changes then the interpreter_frame_result implementation 1658 // will need to be updated too. 1659 1660 //============================================================================= 1661 // Back in Java. 1662 1663 // Memory ordering: Z does not reorder store/load with subsequent 1664 // load. That's strong enough. 1665 __ set_thread_state(_thread_in_Java); 1666 1667 __ reset_last_Java_frame(); 1668 1669 // We reset the JNI handle block only after unboxing the result; see below. 1670 1671 // The method register is junk from after the thread_in_native transition 1672 // until here. Also can't call_VM until the bcp has been 1673 // restored. Need bcp for throwing exception below so get it now. 1674 __ get_method(Rmethod); 1675 1676 // Restore Z_bcp to have legal interpreter frame, 1677 // i.e., bci == 0 <=> Z_bcp == code_base(). 1678 __ z_lg(Z_bcp, Address(Rmethod, Method::const_offset())); // get constMethod 1679 __ add2reg(Z_bcp, in_bytes(ConstMethod::codes_offset())); // get codebase 1680 1681 if (CheckJNICalls) { 1682 // clear_pending_jni_exception_check 1683 __ clear_mem(Address(Z_thread, JavaThread::pending_jni_exception_check_fn_offset()), sizeof(oop)); 1684 } 1685 1686 // Check if the native method returns an oop, and if so, move it 1687 // from the jni handle to z_ijava_state.oop_temp. This is 1688 // necessary, because we reset the jni handle block below. 1689 // NOTE: frame::interpreter_frame_result() depends on this, too. 1690 { NearLabel no_oop_result; 1691 __ load_absolute_address(Z_R1, AbstractInterpreter::result_handler(T_OBJECT)); 1692 __ compareU64_and_branch(Z_R1, Rresult_handler, Assembler::bcondNotEqual, no_oop_result); 1693 __ resolve_jobject(Rlresult, /* tmp1 */ Rmethod, /* tmp2 */ Z_R1); 1694 __ z_stg(Rlresult, oop_tmp_offset, Z_fp); 1695 __ bind(no_oop_result); 1696 } 1697 1698 // Reset handle block. 1699 __ z_lg(Z_R1/*active_handles*/, thread_(active_handles)); 1700 __ clear_mem(Address(Z_R1, JNIHandleBlock::top_offset_in_bytes()), 4); 1701 1702 // Bandle exceptions (exception handling will handle unlocking!). 1703 { 1704 Label L; 1705 __ load_and_test_long(Z_R0/*pending_exception*/, thread_(pending_exception)); 1706 __ z_bre(L); 1707 __ MacroAssembler::call_VM(noreg, 1708 CAST_FROM_FN_PTR(address, 1709 InterpreterRuntime::throw_pending_exception)); 1710 __ should_not_reach_here(); 1711 __ bind(L); 1712 } 1713 1714 if (synchronized) { 1715 Register Rfirst_monitor = Z_ARG2; 1716 __ add2reg(Rfirst_monitor, -(frame::z_ijava_state_size + (int)sizeof(BasicObjectLock)), Z_fp); 1717 #ifdef ASSERT 1718 NearLabel ok; 1719 __ z_lg(Z_R1, _z_ijava_state_neg(monitors), Z_fp); 1720 __ compareU64_and_branch(Rfirst_monitor, Z_R1, Assembler::bcondEqual, ok); 1721 reentry = __ stop_chain_static(reentry, "native_entry:unlock: inconsistent z_ijava_state.monitors"); 1722 __ bind(ok); 1723 #endif 1724 __ unlock_object(Rfirst_monitor); 1725 } 1726 1727 // JVMTI support. Result has already been saved above to the frame. 1728 __ notify_method_exit(true/*native_method*/, ilgl, InterpreterMacroAssembler::NotifyJVMTI); 1729 1730 // Move native method result back into proper registers and return. 1731 // C++ interpreter does not use result handler. So do we need to here? TODO(ZASM): check if correct. 1732 { NearLabel no_oop_or_null; 1733 __ mem2freg_opt(Z_FRET, Address(Z_fp, _z_ijava_state_neg(fresult))); 1734 __ load_and_test_long(Z_RET, Address(Z_fp, _z_ijava_state_neg(lresult))); 1735 __ z_bre(no_oop_or_null); // No unboxing if the result is NULL. 1736 __ load_absolute_address(Z_R1, AbstractInterpreter::result_handler(T_OBJECT)); 1737 __ compareU64_and_branch(Z_R1, Rresult_handler, Assembler::bcondNotEqual, no_oop_or_null); 1738 __ z_lg(Z_RET, oop_tmp_offset, Z_fp); 1739 __ verify_oop(Z_RET); 1740 __ bind(no_oop_or_null); 1741 } 1742 1743 // Pop the native method's interpreter frame. 1744 __ pop_interpreter_frame(Z_R14 /*return_pc*/, Z_ARG2/*tmp1*/, Z_ARG3/*tmp2*/); 1745 1746 // Return to caller. 1747 __ z_br(Z_R14); 1748 1749 if (inc_counter) { 1750 // Handle overflow of counter and compile method. 1751 __ bind(invocation_counter_overflow); 1752 generate_counter_overflow(continue_after_compile); 1753 } 1754 1755 BLOCK_COMMENT("} native_entry"); 1756 1757 return entry_point; 1758 } 1759 1760 // 1761 // Generic interpreted method entry to template interpreter. 1762 // 1763 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) { 1764 address entry_point = __ pc(); 1765 1766 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 1767 1768 // Interpreter entry for ordinary Java methods. 1769 // 1770 // Registers alive 1771 // Z_SP - stack pointer 1772 // Z_thread - JavaThread* 1773 // Z_method - callee's method (method to be invoked) 1774 // Z_esp - operand (or expression) stack pointer of caller. one slot above last arg. 1775 // Z_R10 - sender sp (before modifications, e.g. by c2i adapter 1776 // and as well by generate_fixed_frame below) 1777 // Z_R14 - return address to caller (call_stub or c2i_adapter) 1778 // 1779 // Registers updated 1780 // Z_SP - stack pointer 1781 // Z_fp - callee's framepointer 1782 // Z_esp - callee's operand stack pointer 1783 // points to the slot above the value on top 1784 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord) 1785 // Z_tos - integer result, if any 1786 // z_ftos - floating point result, if any 1787 // 1788 // 1789 // stack layout at this point: 1790 // 1791 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (Z_R10 will be below Z_SP if 1792 // frame was extended by c2i adapter) 1793 // [outgoing Java arguments] <-- Z_esp 1794 // ... 1795 // PARENT [PARENT_IJAVA_FRAME_ABI] 1796 // ... 1797 // 1798 // stack layout before dispatching the first bytecode: 1799 // 1800 // F0 [TOP_IJAVA_FRAME_ABI] <-- Z_SP 1801 // [operand stack] <-- Z_esp 1802 // monitor (optional, can grow) 1803 // [IJAVA_STATE] 1804 // F1 [PARENT_IJAVA_FRAME_ABI] <-- Z_fp (== *Z_SP) 1805 // [F0's locals] <-- Z_locals 1806 // [F1's operand stack] 1807 // [F1's monitors] (optional) 1808 // [IJAVA_STATE] 1809 1810 // Make sure registers are different! 1811 assert_different_registers(Z_thread, Z_method, Z_esp); 1812 1813 BLOCK_COMMENT("normal_entry {"); 1814 1815 // Make sure method is not native and not abstract. 1816 // Rethink these assertions - they can be simplified and shared. 1817 #ifdef ASSERT 1818 address reentry = NULL; 1819 { Label L; 1820 __ testbit(method_(access_flags), JVM_ACC_NATIVE_BIT); 1821 __ z_bfalse(L); 1822 reentry = __ stop_chain_static(reentry, "tried to execute native method as non-native"); 1823 __ bind(L); 1824 } 1825 { Label L; 1826 __ testbit(method_(access_flags), JVM_ACC_ABSTRACT_BIT); 1827 __ z_bfalse(L); 1828 reentry = __ stop_chain_static(reentry, "tried to execute abstract method as non-abstract"); 1829 __ bind(L); 1830 } 1831 #endif // ASSERT 1832 1833 #ifdef ASSERT 1834 // Save the return PC into the callers frame for assertion in generate_fixed_frame. 1835 __ save_return_pc(Z_R14); 1836 #endif 1837 1838 // Generate the code to allocate the interpreter stack frame. 1839 generate_fixed_frame(false); 1840 1841 const Address do_not_unlock_if_synchronized(Z_thread, JavaThread::do_not_unlock_if_synchronized_offset()); 1842 // Since at this point in the method invocation the exception handler 1843 // would try to exit the monitor of synchronized methods which hasn't 1844 // been entered yet, we set the thread local variable 1845 // _do_not_unlock_if_synchronized to true. If any exception was thrown by 1846 // runtime, exception handling i.e. unlock_if_synchronized_method will 1847 // check this thread local flag. 1848 __ z_mvi(do_not_unlock_if_synchronized, true); 1849 1850 __ profile_parameters_type(Z_tmp_2, Z_ARG3, Z_ARG4); 1851 1852 // Increment invocation counter and check for overflow. 1853 // 1854 // Note: checking for negative value instead of overflow so we have a 'sticky' 1855 // overflow test (may be of importance as soon as we have true MT/MP). 1856 NearLabel invocation_counter_overflow; 1857 NearLabel profile_method; 1858 NearLabel profile_method_continue; 1859 NearLabel Lcontinue; 1860 if (inc_counter) { 1861 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue); 1862 if (ProfileInterpreter) { 1863 __ bind(profile_method_continue); 1864 } 1865 } 1866 __ bind(Lcontinue); 1867 1868 bang_stack_shadow_pages(false); 1869 1870 // Reset the _do_not_unlock_if_synchronized flag. 1871 __ z_mvi(do_not_unlock_if_synchronized, false); 1872 1873 // Check for synchronized methods. 1874 // Must happen AFTER invocation_counter check and stack overflow check, 1875 // so method is not locked if overflows. 1876 if (synchronized) { 1877 // Allocate monitor and lock method. 1878 lock_method(); 1879 } else { 1880 #ifdef ASSERT 1881 { Label L; 1882 __ get_method(Z_R1_scratch); 1883 __ testbit(method2_(Z_R1_scratch, access_flags), JVM_ACC_SYNCHRONIZED_BIT); 1884 __ z_bfalse(L); 1885 reentry = __ stop_chain_static(reentry, "method needs synchronization"); 1886 __ bind(L); 1887 } 1888 #endif // ASSERT 1889 } 1890 1891 // start execution 1892 1893 #ifdef ASSERT 1894 __ verify_esp(Z_esp, Z_R1_scratch); 1895 1896 __ verify_thread(); 1897 #endif 1898 1899 // jvmti support 1900 __ notify_method_entry(); 1901 1902 // Start executing instructions. 1903 __ dispatch_next(vtos); 1904 // Dispatch_next does not return. 1905 DEBUG_ONLY(__ should_not_reach_here()); 1906 1907 // Invocation counter overflow. 1908 if (inc_counter) { 1909 if (ProfileInterpreter) { 1910 // We have decided to profile this method in the interpreter. 1911 __ bind(profile_method); 1912 1913 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); 1914 __ set_method_data_pointer_for_bcp(); 1915 __ z_bru(profile_method_continue); 1916 } 1917 1918 // Handle invocation counter overflow. 1919 __ bind(invocation_counter_overflow); 1920 generate_counter_overflow(Lcontinue); 1921 } 1922 1923 BLOCK_COMMENT("} normal_entry"); 1924 1925 return entry_point; 1926 } 1927 1928 1929 /** 1930 * Method entry for static native methods: 1931 * int java.util.zip.CRC32.update(int crc, int b) 1932 */ 1933 address TemplateInterpreterGenerator::generate_CRC32_update_entry() { 1934 1935 if (UseCRC32Intrinsics) { 1936 uint64_t entry_off = __ offset(); 1937 Label slow_path; 1938 1939 // If we need a safepoint check, generate full interpreter entry. 1940 __ safepoint_poll(slow_path, Z_R1); 1941 1942 BLOCK_COMMENT("CRC32_update {"); 1943 1944 // We don't generate local frame and don't align stack because 1945 // we not even call stub code (we generate the code inline) 1946 // and there is no safepoint on this path. 1947 1948 // Load java parameters. 1949 // Z_esp is callers operand stack pointer, i.e. it points to the parameters. 1950 const Register argP = Z_esp; 1951 const Register crc = Z_ARG1; // crc value 1952 const Register data = Z_ARG2; // address of java byte value (kernel_crc32 needs address) 1953 const Register dataLen = Z_ARG3; // source data len (1 byte). Not used because calling the single-byte emitter. 1954 const Register table = Z_ARG4; // address of crc32 table 1955 1956 // Arguments are reversed on java expression stack. 1957 __ z_la(data, 3+1*wordSize, argP); // byte value (stack address). 1958 // Being passed as an int, the single byte is at offset +3. 1959 __ z_llgf(crc, 2 * wordSize, argP); // Current crc state, zero extend to 64 bit to have a clean register. 1960 1961 StubRoutines::zarch::generate_load_crc_table_addr(_masm, table); 1962 __ kernel_crc32_singleByte(crc, data, dataLen, table, Z_R1, true); 1963 1964 // Restore caller sp for c2i case. 1965 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. 1966 1967 __ z_br(Z_R14); 1968 1969 BLOCK_COMMENT("} CRC32_update"); 1970 1971 // Use a previously generated vanilla native entry as the slow path. 1972 BIND(slow_path); 1973 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), Z_R1); 1974 return __ addr_at(entry_off); 1975 } 1976 1977 return NULL; 1978 } 1979 1980 1981 /** 1982 * Method entry for static native methods: 1983 * int java.util.zip.CRC32.updateBytes( int crc, byte[] b, int off, int len) 1984 * int java.util.zip.CRC32.updateByteBuffer(int crc, long* buf, int off, int len) 1985 */ 1986 address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) { 1987 1988 if (UseCRC32Intrinsics) { 1989 uint64_t entry_off = __ offset(); 1990 Label slow_path; 1991 1992 // If we need a safepoint check, generate full interpreter entry. 1993 __ safepoint_poll(slow_path, Z_R1); 1994 1995 // We don't generate local frame and don't align stack because 1996 // we call stub code and there is no safepoint on this path. 1997 1998 // Load parameters. 1999 // Z_esp is callers operand stack pointer, i.e. it points to the parameters. 2000 const Register argP = Z_esp; 2001 const Register crc = Z_ARG1; // crc value 2002 const Register data = Z_ARG2; // address of java byte array 2003 const Register dataLen = Z_ARG3; // source data len 2004 const Register table = Z_ARG4; // address of crc32 table 2005 const Register t0 = Z_R10; // work reg for kernel* emitters 2006 const Register t1 = Z_R11; // work reg for kernel* emitters 2007 const Register t2 = Z_R12; // work reg for kernel* emitters 2008 const Register t3 = Z_R13; // work reg for kernel* emitters 2009 2010 // Arguments are reversed on java expression stack. 2011 // Calculate address of start element. 2012 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) { // Used for "updateByteBuffer direct". 2013 // crc @ (SP + 5W) (32bit) 2014 // buf @ (SP + 3W) (64bit ptr to long array) 2015 // off @ (SP + 2W) (32bit) 2016 // dataLen @ (SP + 1W) (32bit) 2017 // data = buf + off 2018 BLOCK_COMMENT("CRC32_updateByteBuffer {"); 2019 __ z_llgf(crc, 5*wordSize, argP); // current crc state 2020 __ z_lg(data, 3*wordSize, argP); // start of byte buffer 2021 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset. 2022 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process 2023 } else { // Used for "updateBytes update". 2024 // crc @ (SP + 4W) (32bit) 2025 // buf @ (SP + 3W) (64bit ptr to byte array) 2026 // off @ (SP + 2W) (32bit) 2027 // dataLen @ (SP + 1W) (32bit) 2028 // data = buf + off + base_offset 2029 BLOCK_COMMENT("CRC32_updateBytes {"); 2030 __ z_llgf(crc, 4*wordSize, argP); // current crc state 2031 __ z_lg(data, 3*wordSize, argP); // start of byte buffer 2032 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset. 2033 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process 2034 __ z_aghi(data, arrayOopDesc::base_offset_in_bytes(T_BYTE)); 2035 } 2036 2037 StubRoutines::zarch::generate_load_crc_table_addr(_masm, table); 2038 2039 __ resize_frame(-(6*8), Z_R0, true); // Resize frame to provide add'l space to spill 5 registers. 2040 __ z_stmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 to make them available as work registers. 2041 __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, true); 2042 __ z_lmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 back from stack. 2043 2044 // Restore caller sp for c2i case. 2045 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. 2046 2047 __ z_br(Z_R14); 2048 2049 BLOCK_COMMENT("} CRC32_update{Bytes|ByteBuffer}"); 2050 2051 // Use a previously generated vanilla native entry as the slow path. 2052 BIND(slow_path); 2053 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), Z_R1); 2054 return __ addr_at(entry_off); 2055 } 2056 2057 return NULL; 2058 } 2059 2060 2061 /** 2062 * Method entry for intrinsic-candidate (non-native) methods: 2063 * int java.util.zip.CRC32C.updateBytes( int crc, byte[] b, int off, int end) 2064 * int java.util.zip.CRC32C.updateDirectByteBuffer(int crc, long* buf, int off, int end) 2065 * Unlike CRC32, CRC32C does not have any methods marked as native 2066 * CRC32C also uses an "end" variable instead of the length variable CRC32 uses 2067 */ 2068 address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) { 2069 2070 if (UseCRC32CIntrinsics) { 2071 uint64_t entry_off = __ offset(); 2072 2073 // We don't generate local frame and don't align stack because 2074 // we call stub code and there is no safepoint on this path. 2075 2076 // Load parameters. 2077 // Z_esp is callers operand stack pointer, i.e. it points to the parameters. 2078 const Register argP = Z_esp; 2079 const Register crc = Z_ARG1; // crc value 2080 const Register data = Z_ARG2; // address of java byte array 2081 const Register dataLen = Z_ARG3; // source data len 2082 const Register table = Z_ARG4; // address of crc32 table 2083 const Register t0 = Z_R10; // work reg for kernel* emitters 2084 const Register t1 = Z_R11; // work reg for kernel* emitters 2085 const Register t2 = Z_R12; // work reg for kernel* emitters 2086 const Register t3 = Z_R13; // work reg for kernel* emitters 2087 2088 // Arguments are reversed on java expression stack. 2089 // Calculate address of start element. 2090 if (kind == Interpreter::java_util_zip_CRC32C_updateDirectByteBuffer) { // Used for "updateByteBuffer direct". 2091 // crc @ (SP + 5W) (32bit) 2092 // buf @ (SP + 3W) (64bit ptr to long array) 2093 // off @ (SP + 2W) (32bit) 2094 // dataLen @ (SP + 1W) (32bit) 2095 // data = buf + off 2096 BLOCK_COMMENT("CRC32C_updateDirectByteBuffer {"); 2097 __ z_llgf(crc, 5*wordSize, argP); // current crc state 2098 __ z_lg(data, 3*wordSize, argP); // start of byte buffer 2099 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset. 2100 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process, calculated as 2101 __ z_sgf(dataLen, Address(argP, 2*wordSize)); // (end_index - offset) 2102 } else { // Used for "updateBytes update". 2103 // crc @ (SP + 4W) (32bit) 2104 // buf @ (SP + 3W) (64bit ptr to byte array) 2105 // off @ (SP + 2W) (32bit) 2106 // dataLen @ (SP + 1W) (32bit) 2107 // data = buf + off + base_offset 2108 BLOCK_COMMENT("CRC32C_updateBytes {"); 2109 __ z_llgf(crc, 4*wordSize, argP); // current crc state 2110 __ z_lg(data, 3*wordSize, argP); // start of byte buffer 2111 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset. 2112 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process, calculated as 2113 __ z_sgf(dataLen, Address(argP, 2*wordSize)); // (end_index - offset) 2114 __ z_aghi(data, arrayOopDesc::base_offset_in_bytes(T_BYTE)); 2115 } 2116 2117 StubRoutines::zarch::generate_load_crc32c_table_addr(_masm, table); 2118 2119 __ resize_frame(-(6*8), Z_R0, true); // Resize frame to provide add'l space to spill 5 registers. 2120 __ z_stmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 to make them available as work registers. 2121 __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, false); 2122 __ z_lmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 back from stack. 2123 2124 // Restore caller sp for c2i case. 2125 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. 2126 2127 __ z_br(Z_R14); 2128 2129 BLOCK_COMMENT("} CRC32C_update{Bytes|DirectByteBuffer}"); 2130 return __ addr_at(entry_off); 2131 } 2132 2133 return NULL; 2134 } 2135 2136 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { 2137 // Quick & dirty stack overflow checking: bang the stack & handle trap. 2138 // Note that we do the banging after the frame is setup, since the exception 2139 // handling code expects to find a valid interpreter frame on the stack. 2140 // Doing the banging earlier fails if the caller frame is not an interpreter 2141 // frame. 2142 // (Also, the exception throwing code expects to unlock any synchronized 2143 // method receiver, so do the banging after locking the receiver.) 2144 2145 // Bang each page in the shadow zone. We can't assume it's been done for 2146 // an interpreter frame with greater than a page of locals, so each page 2147 // needs to be checked. Only true for non-native. For native, we only bang the last page. 2148 if (UseStackBanging) { 2149 const int page_size = os::vm_page_size(); 2150 const int n_shadow_pages = (int)(JavaThread::stack_shadow_zone_size()/page_size); 2151 const int start_page_num = native_call ? n_shadow_pages : 1; 2152 for (int pages = start_page_num; pages <= n_shadow_pages; pages++) { 2153 __ bang_stack_with_offset(pages*page_size); 2154 } 2155 } 2156 } 2157 2158 //----------------------------------------------------------------------------- 2159 // Exceptions 2160 2161 void TemplateInterpreterGenerator::generate_throw_exception() { 2162 2163 BLOCK_COMMENT("throw_exception {"); 2164 2165 // Entry point in previous activation (i.e., if the caller was interpreted). 2166 Interpreter::_rethrow_exception_entry = __ pc(); 2167 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Frame accessors use Z_fp. 2168 // Z_ARG1 (==Z_tos): exception 2169 // Z_ARG2 : Return address/pc that threw exception. 2170 __ restore_bcp(); // R13 points to call/send. 2171 __ restore_locals(); 2172 2173 // Fallthrough, no need to restore Z_esp. 2174 2175 // Entry point for exceptions thrown within interpreter code. 2176 Interpreter::_throw_exception_entry = __ pc(); 2177 // Expression stack is undefined here. 2178 // Z_ARG1 (==Z_tos): exception 2179 // Z_bcp: exception bcp 2180 __ verify_oop(Z_ARG1); 2181 __ z_lgr(Z_ARG2, Z_ARG1); 2182 2183 // Expression stack must be empty before entering the VM in case of 2184 // an exception. 2185 __ empty_expression_stack(); 2186 // Find exception handler address and preserve exception oop. 2187 const Register Rpreserved_exc_oop = Z_tmp_1; 2188 __ call_VM(Rpreserved_exc_oop, 2189 CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), 2190 Z_ARG2); 2191 // Z_RET: exception handler entry point 2192 // Z_bcp: bcp for exception handler 2193 __ push_ptr(Rpreserved_exc_oop); // Push exception which is now the only value on the stack. 2194 __ z_br(Z_RET); // Jump to exception handler (may be _remove_activation_entry!). 2195 2196 // If the exception is not handled in the current frame the frame is 2197 // removed and the exception is rethrown (i.e. exception 2198 // continuation is _rethrow_exception). 2199 // 2200 // Note: At this point the bci is still the bci for the instruction 2201 // which caused the exception and the expression stack is 2202 // empty. Thus, for any VM calls at this point, GC will find a legal 2203 // oop map (with empty expression stack). 2204 2205 // 2206 // JVMTI PopFrame support 2207 // 2208 2209 Interpreter::_remove_activation_preserving_args_entry = __ pc(); 2210 __ z_lg(Z_fp, _z_parent_ijava_frame_abi(callers_sp), Z_SP); 2211 __ empty_expression_stack(); 2212 // Set the popframe_processing bit in pending_popframe_condition 2213 // indicating that we are currently handling popframe, so that 2214 // call_VMs that may happen later do not trigger new popframe 2215 // handling cycles. 2216 __ load_sized_value(Z_tmp_1, Address(Z_thread, JavaThread::popframe_condition_offset()), 4, false /*signed*/); 2217 __ z_oill(Z_tmp_1, JavaThread::popframe_processing_bit); 2218 __ z_sty(Z_tmp_1, thread_(popframe_condition)); 2219 2220 { 2221 // Check to see whether we are returning to a deoptimized frame. 2222 // (The PopFrame call ensures that the caller of the popped frame is 2223 // either interpreted or compiled and deoptimizes it if compiled.) 2224 // In this case, we can't call dispatch_next() after the frame is 2225 // popped, but instead must save the incoming arguments and restore 2226 // them after deoptimization has occurred. 2227 // 2228 // Note that we don't compare the return PC against the 2229 // deoptimization blob's unpack entry because of the presence of 2230 // adapter frames in C2. 2231 NearLabel caller_not_deoptimized; 2232 __ z_lg(Z_ARG1, _z_parent_ijava_frame_abi(return_pc), Z_fp); 2233 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), Z_ARG1); 2234 __ compareU64_and_branch(Z_RET, (intptr_t)0, Assembler::bcondNotEqual, caller_not_deoptimized); 2235 2236 // Compute size of arguments for saving when returning to 2237 // deoptimized caller. 2238 __ get_method(Z_ARG2); 2239 __ z_lg(Z_ARG2, Address(Z_ARG2, Method::const_offset())); 2240 __ z_llgh(Z_ARG2, Address(Z_ARG2, ConstMethod::size_of_parameters_offset())); 2241 __ z_sllg(Z_ARG2, Z_ARG2, Interpreter::logStackElementSize); // slots 2 bytes 2242 __ restore_locals(); 2243 // Compute address of args to be saved. 2244 __ z_lgr(Z_ARG3, Z_locals); 2245 __ z_slgr(Z_ARG3, Z_ARG2); 2246 __ add2reg(Z_ARG3, wordSize); 2247 // Save these arguments. 2248 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), 2249 Z_thread, Z_ARG2, Z_ARG3); 2250 2251 __ remove_activation(vtos, Z_R14, 2252 /* throw_monitor_exception */ false, 2253 /* install_monitor_exception */ false, 2254 /* notify_jvmdi */ false); 2255 2256 // Inform deoptimization that it is responsible for restoring 2257 // these arguments. 2258 __ store_const(thread_(popframe_condition), 2259 JavaThread::popframe_force_deopt_reexecution_bit, 2260 Z_tmp_1, false); 2261 2262 // Continue in deoptimization handler. 2263 __ z_br(Z_R14); 2264 2265 __ bind(caller_not_deoptimized); 2266 } 2267 2268 // Clear the popframe condition flag. 2269 __ clear_mem(thread_(popframe_condition), sizeof(int)); 2270 2271 __ remove_activation(vtos, 2272 noreg, // Retaddr is not used. 2273 false, // throw_monitor_exception 2274 false, // install_monitor_exception 2275 false); // notify_jvmdi 2276 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer. 2277 __ restore_bcp(); 2278 __ restore_locals(); 2279 __ restore_esp(); 2280 // The method data pointer was incremented already during 2281 // call profiling. We have to restore the mdp for the current bcp. 2282 if (ProfileInterpreter) { 2283 __ set_method_data_pointer_for_bcp(); 2284 } 2285 #if INCLUDE_JVMTI 2286 { 2287 Label L_done; 2288 2289 __ z_cli(0, Z_bcp, Bytecodes::_invokestatic); 2290 __ z_brc(Assembler::bcondNotEqual, L_done); 2291 2292 // The member name argument must be restored if _invokestatic is 2293 // re-executed after a PopFrame call. Detect such a case in the 2294 // InterpreterRuntime function and return the member name 2295 // argument, or NULL. 2296 __ z_lg(Z_ARG2, Address(Z_locals)); 2297 __ get_method(Z_ARG3); 2298 __ call_VM(Z_tmp_1, 2299 CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), 2300 Z_ARG2, Z_ARG3, Z_bcp); 2301 2302 __ z_ltgr(Z_tmp_1, Z_tmp_1); 2303 __ z_brc(Assembler::bcondEqual, L_done); 2304 2305 __ z_stg(Z_tmp_1, Address(Z_esp, wordSize)); 2306 __ bind(L_done); 2307 } 2308 #endif // INCLUDE_JVMTI 2309 __ dispatch_next(vtos); 2310 // End of PopFrame support. 2311 Interpreter::_remove_activation_entry = __ pc(); 2312 2313 // In between activations - previous activation type unknown yet 2314 // compute continuation point - the continuation point expects the 2315 // following registers set up: 2316 // 2317 // Z_ARG1 (==Z_tos): exception 2318 // Z_ARG2 : return address/pc that threw exception 2319 2320 Register return_pc = Z_tmp_1; 2321 Register handler = Z_tmp_2; 2322 assert(return_pc->is_nonvolatile(), "use non-volatile reg. to preserve exception pc"); 2323 assert(handler->is_nonvolatile(), "use non-volatile reg. to handler pc"); 2324 __ asm_assert_ijava_state_magic(return_pc/*tmp*/); // The top frame should be an interpreter frame. 2325 __ z_lg(return_pc, _z_parent_ijava_frame_abi(return_pc), Z_fp); 2326 2327 // Moved removing the activation after VM call, because the new top 2328 // frame does not necessarily have the z_abi_160 required for a VM 2329 // call (e.g. if it is compiled). 2330 2331 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 2332 SharedRuntime::exception_handler_for_return_address), 2333 Z_thread, return_pc); 2334 __ z_lgr(handler, Z_RET); // Save exception handler. 2335 2336 // Preserve exception over this code sequence. 2337 __ pop_ptr(Z_ARG1); 2338 __ set_vm_result(Z_ARG1); 2339 // Remove the activation (without doing throws on illegalMonitorExceptions). 2340 __ remove_activation(vtos, noreg/*ret.pc already loaded*/, false/*throw exc*/, true/*install exc*/, false/*notify jvmti*/); 2341 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer. 2342 2343 __ get_vm_result(Z_ARG1); // Restore exception. 2344 __ verify_oop(Z_ARG1); 2345 __ z_lgr(Z_ARG2, return_pc); // Restore return address. 2346 2347 #ifdef ASSERT 2348 // The return_pc in the new top frame is dead... at least that's my 2349 // current understanding. To assert this I overwrite it. 2350 // Note: for compiled frames the handler is the deopt blob 2351 // which writes Z_ARG2 into the return_pc slot. 2352 __ load_const_optimized(return_pc, 0xb00b1); 2353 __ z_stg(return_pc, _z_parent_ijava_frame_abi(return_pc), Z_SP); 2354 #endif 2355 2356 // Z_ARG1 (==Z_tos): exception 2357 // Z_ARG2 : return address/pc that threw exception 2358 2359 // Note that an "issuing PC" is actually the next PC after the call. 2360 __ z_br(handler); // Jump to exception handler of caller. 2361 2362 BLOCK_COMMENT("} throw_exception"); 2363 } 2364 2365 // 2366 // JVMTI ForceEarlyReturn support 2367 // 2368 address TemplateInterpreterGenerator::generate_earlyret_entry_for (TosState state) { 2369 address entry = __ pc(); 2370 2371 BLOCK_COMMENT("earlyret_entry {"); 2372 2373 __ z_lg(Z_fp, _z_parent_ijava_frame_abi(callers_sp), Z_SP); 2374 __ restore_bcp(); 2375 __ restore_locals(); 2376 __ restore_esp(); 2377 __ empty_expression_stack(); 2378 __ load_earlyret_value(state); 2379 2380 Register RjvmtiState = Z_tmp_1; 2381 __ z_lg(RjvmtiState, thread_(jvmti_thread_state)); 2382 __ store_const(Address(RjvmtiState, JvmtiThreadState::earlyret_state_offset()), 2383 JvmtiThreadState::earlyret_inactive, 4, 4, Z_R0_scratch); 2384 2385 if (state == itos) { 2386 // Narrow result if state is itos but result type is smaller. 2387 // Need to narrow in the return bytecode rather than in generate_return_entry 2388 // since compiled code callers expect the result to already be narrowed. 2389 __ narrow(Z_tos, Z_tmp_1); /* fall through */ 2390 } 2391 __ remove_activation(state, 2392 Z_tmp_1, // retaddr 2393 false, // throw_monitor_exception 2394 false, // install_monitor_exception 2395 true); // notify_jvmdi 2396 __ z_br(Z_tmp_1); 2397 2398 BLOCK_COMMENT("} earlyret_entry"); 2399 2400 return entry; 2401 } 2402 2403 //----------------------------------------------------------------------------- 2404 // Helper for vtos entry point generation. 2405 2406 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, 2407 address& bep, 2408 address& cep, 2409 address& sep, 2410 address& aep, 2411 address& iep, 2412 address& lep, 2413 address& fep, 2414 address& dep, 2415 address& vep) { 2416 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); 2417 Label L; 2418 aep = __ pc(); __ push_ptr(); __ z_bru(L); 2419 fep = __ pc(); __ push_f(); __ z_bru(L); 2420 dep = __ pc(); __ push_d(); __ z_bru(L); 2421 lep = __ pc(); __ push_l(); __ z_bru(L); 2422 bep = cep = sep = 2423 iep = __ pc(); __ push_i(); 2424 vep = __ pc(); 2425 __ bind(L); 2426 generate_and_dispatch(t); 2427 } 2428 2429 //----------------------------------------------------------------------------- 2430 2431 #ifndef PRODUCT 2432 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { 2433 address entry = __ pc(); 2434 NearLabel counter_below_trace_threshold; 2435 2436 if (TraceBytecodesAt > 0) { 2437 // Skip runtime call, if the trace threshold is not yet reached. 2438 __ load_absolute_address(Z_tmp_1, (address)&BytecodeCounter::_counter_value); 2439 __ load_absolute_address(Z_tmp_2, (address)&TraceBytecodesAt); 2440 __ load_sized_value(Z_tmp_1, Address(Z_tmp_1), 4, false /*signed*/); 2441 __ load_sized_value(Z_tmp_2, Address(Z_tmp_2), 8, false /*signed*/); 2442 __ compareU64_and_branch(Z_tmp_1, Z_tmp_2, Assembler::bcondLow, counter_below_trace_threshold); 2443 } 2444 2445 int offset2 = state == ltos || state == dtos ? 2 : 1; 2446 2447 __ push(state); 2448 // Preserved return pointer is in Z_R14. 2449 // InterpreterRuntime::trace_bytecode() preserved and returns the value passed as second argument. 2450 __ z_lgr(Z_ARG2, Z_R14); 2451 __ z_lg(Z_ARG3, Address(Z_esp, Interpreter::expr_offset_in_bytes(0))); 2452 if (WizardMode) { 2453 __ z_lgr(Z_ARG4, Z_esp); // Trace Z_esp in WizardMode. 2454 } else { 2455 __ z_lg(Z_ARG4, Address(Z_esp, Interpreter::expr_offset_in_bytes(offset2))); 2456 } 2457 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), Z_ARG2, Z_ARG3, Z_ARG4); 2458 __ z_lgr(Z_R14, Z_RET); // Estore return address (see above). 2459 __ pop(state); 2460 2461 __ bind(counter_below_trace_threshold); 2462 __ z_br(Z_R14); // return 2463 2464 return entry; 2465 } 2466 2467 // Make feasible for old CPUs. 2468 void TemplateInterpreterGenerator::count_bytecode() { 2469 __ load_absolute_address(Z_R1_scratch, (address) &BytecodeCounter::_counter_value); 2470 __ add2mem_32(Address(Z_R1_scratch), 1, Z_R0_scratch); 2471 } 2472 2473 void TemplateInterpreterGenerator::histogram_bytecode(Template * t) { 2474 __ load_absolute_address(Z_R1_scratch, (address)&BytecodeHistogram::_counters[ t->bytecode() ]); 2475 __ add2mem_32(Address(Z_R1_scratch), 1, Z_tmp_1); 2476 } 2477 2478 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template * t) { 2479 Address index_addr(Z_tmp_1, (intptr_t) 0); 2480 Register index = Z_tmp_2; 2481 2482 // Load previous index. 2483 __ load_absolute_address(Z_tmp_1, (address) &BytecodePairHistogram::_index); 2484 __ mem2reg_opt(index, index_addr, false); 2485 2486 // Mask with current bytecode and store as new previous index. 2487 __ z_srl(index, BytecodePairHistogram::log2_number_of_codes); 2488 __ load_const_optimized(Z_R0_scratch, 2489 (int)t->bytecode() << BytecodePairHistogram::log2_number_of_codes); 2490 __ z_or(index, Z_R0_scratch); 2491 __ reg2mem_opt(index, index_addr, false); 2492 2493 // Load counter array's address. 2494 __ z_lgfr(index, index); // Sign extend for addressing. 2495 __ z_sllg(index, index, LogBytesPerInt); // index2bytes 2496 __ load_absolute_address(Z_R1_scratch, 2497 (address) &BytecodePairHistogram::_counters); 2498 // Add index and increment counter. 2499 __ z_agr(Z_R1_scratch, index); 2500 __ add2mem_32(Address(Z_R1_scratch), 1, Z_tmp_1); 2501 } 2502 2503 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { 2504 // Call a little run-time stub to avoid blow-up for each bytecode. 2505 // The run-time runtime saves the right registers, depending on 2506 // the tosca in-state for the given template. 2507 address entry = Interpreter::trace_code(t->tos_in()); 2508 guarantee(entry != NULL, "entry must have been generated"); 2509 __ call_stub(entry); 2510 } 2511 2512 void TemplateInterpreterGenerator::stop_interpreter_at() { 2513 NearLabel L; 2514 2515 __ load_absolute_address(Z_tmp_1, (address)&BytecodeCounter::_counter_value); 2516 __ load_absolute_address(Z_tmp_2, (address)&StopInterpreterAt); 2517 __ load_sized_value(Z_tmp_1, Address(Z_tmp_1), 4, false /*signed*/); 2518 __ load_sized_value(Z_tmp_2, Address(Z_tmp_2), 8, false /*signed*/); 2519 __ compareU64_and_branch(Z_tmp_1, Z_tmp_2, Assembler::bcondLow, L); 2520 assert(Z_tmp_1->is_nonvolatile(), "must be nonvolatile to preserve Z_tos"); 2521 assert(Z_F8->is_nonvolatile(), "must be nonvolatile to preserve Z_ftos"); 2522 __ z_lgr(Z_tmp_1, Z_tos); // Save tos. 2523 __ z_lgr(Z_tmp_2, Z_bytecode); // Save Z_bytecode. 2524 __ z_ldr(Z_F8, Z_ftos); // Save ftos. 2525 // Use -XX:StopInterpreterAt=<num> to set the limit 2526 // and break at breakpoint(). 2527 __ call_VM(noreg, CAST_FROM_FN_PTR(address, breakpoint), false); 2528 __ z_lgr(Z_tos, Z_tmp_1); // Restore tos. 2529 __ z_lgr(Z_bytecode, Z_tmp_2); // Save Z_bytecode. 2530 __ z_ldr(Z_ftos, Z_F8); // Restore ftos. 2531 __ bind(L); 2532 } 2533 2534 #endif // !PRODUCT