1 /* 2 * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2015, 2016 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/bytecodeHistogram.hpp" 29 #include "interpreter/interpreter.hpp" 30 #include "interpreter/interpreterRuntime.hpp" 31 #include "interpreter/interp_masm.hpp" 32 #include "interpreter/templateInterpreterGenerator.hpp" 33 #include "interpreter/templateTable.hpp" 34 #include "oops/arrayOop.hpp" 35 #include "oops/methodData.hpp" 36 #include "oops/method.hpp" 37 #include "oops/oop.inline.hpp" 38 #include "prims/jvmtiExport.hpp" 39 #include "prims/jvmtiThreadState.hpp" 40 #include "runtime/arguments.hpp" 41 #include "runtime/deoptimization.hpp" 42 #include "runtime/frame.inline.hpp" 43 #include "runtime/sharedRuntime.hpp" 44 #include "runtime/stubRoutines.hpp" 45 #include "runtime/synchronizer.hpp" 46 #include "runtime/timer.hpp" 47 #include "runtime/vframeArray.hpp" 48 #include "utilities/debug.hpp" 49 #include "utilities/macros.hpp" 50 51 #undef __ 52 #define __ _masm-> 53 54 // Size of interpreter code. Increase if too small. Interpreter will 55 // fail with a guarantee ("not enough space for interpreter generation"); 56 // if too small. 57 // Run with +PrintInterpreter to get the VM to print out the size. 58 // Max size with JVMTI 59 int TemplateInterpreter::InterpreterCodeSize = 230*K; 60 61 #ifdef PRODUCT 62 #define BLOCK_COMMENT(str) /* nothing */ 63 #else 64 #define BLOCK_COMMENT(str) __ block_comment(str) 65 #endif 66 67 #define BIND(label) __ bind(label); BLOCK_COMMENT(#label ":") 68 69 //----------------------------------------------------------------------------- 70 71 address TemplateInterpreterGenerator::generate_slow_signature_handler() { 72 // Slow_signature handler that respects the PPC C calling conventions. 73 // 74 // We get called by the native entry code with our output register 75 // area == 8. First we call InterpreterRuntime::get_result_handler 76 // to copy the pointer to the signature string temporarily to the 77 // first C-argument and to return the result_handler in 78 // R3_RET. Since native_entry will copy the jni-pointer to the 79 // first C-argument slot later on, it is OK to occupy this slot 80 // temporarilly. Then we copy the argument list on the java 81 // expression stack into native varargs format on the native stack 82 // and load arguments into argument registers. Integer arguments in 83 // the varargs vector will be sign-extended to 8 bytes. 84 // 85 // On entry: 86 // R3_ARG1 - intptr_t* Address of java argument list in memory. 87 // R15_prev_state - BytecodeInterpreter* Address of interpreter state for 88 // this method 89 // R19_method 90 // 91 // On exit (just before return instruction): 92 // R3_RET - contains the address of the result_handler. 93 // R4_ARG2 - is not updated for static methods and contains "this" otherwise. 94 // R5_ARG3-R10_ARG8: - When the (i-2)th Java argument is not of type float or double, 95 // ARGi contains this argument. Otherwise, ARGi is not updated. 96 // F1_ARG1-F13_ARG13 - contain the first 13 arguments of type float or double. 97 98 const int LogSizeOfTwoInstructions = 3; 99 100 // FIXME: use Argument:: GL: Argument names different numbers! 101 const int max_fp_register_arguments = 13; 102 const int max_int_register_arguments = 6; // first 2 are reserved 103 104 const Register arg_java = R21_tmp1; 105 const Register arg_c = R22_tmp2; 106 const Register signature = R23_tmp3; // is string 107 const Register sig_byte = R24_tmp4; 108 const Register fpcnt = R25_tmp5; 109 const Register argcnt = R26_tmp6; 110 const Register intSlot = R27_tmp7; 111 const Register target_sp = R28_tmp8; 112 const FloatRegister floatSlot = F0; 113 114 address entry = __ function_entry(); 115 116 __ save_LR_CR(R0); 117 __ save_nonvolatile_gprs(R1_SP, _spill_nonvolatiles_neg(r14)); 118 // We use target_sp for storing arguments in the C frame. 119 __ mr(target_sp, R1_SP); 120 __ push_frame_reg_args_nonvolatiles(0, R11_scratch1); 121 122 __ mr(arg_java, R3_ARG1); 123 124 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::get_signature), R16_thread, R19_method); 125 126 // Signature is in R3_RET. Signature is callee saved. 127 __ mr(signature, R3_RET); 128 129 // Get the result handler. 130 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::get_result_handler), R16_thread, R19_method); 131 132 { 133 Label L; 134 // test if static 135 // _access_flags._flags must be at offset 0. 136 // TODO PPC port: requires change in shared code. 137 //assert(in_bytes(AccessFlags::flags_offset()) == 0, 138 // "MethodDesc._access_flags == MethodDesc._access_flags._flags"); 139 // _access_flags must be a 32 bit value. 140 assert(sizeof(AccessFlags) == 4, "wrong size"); 141 __ lwa(R11_scratch1/*access_flags*/, method_(access_flags)); 142 // testbit with condition register. 143 __ testbitdi(CCR0, R0, R11_scratch1/*access_flags*/, JVM_ACC_STATIC_BIT); 144 __ btrue(CCR0, L); 145 // For non-static functions, pass "this" in R4_ARG2 and copy it 146 // to 2nd C-arg slot. 147 // We need to box the Java object here, so we use arg_java 148 // (address of current Java stack slot) as argument and don't 149 // dereference it as in case of ints, floats, etc. 150 __ mr(R4_ARG2, arg_java); 151 __ addi(arg_java, arg_java, -BytesPerWord); 152 __ std(R4_ARG2, _abi(carg_2), target_sp); 153 __ bind(L); 154 } 155 156 // Will be incremented directly after loop_start. argcnt=0 157 // corresponds to 3rd C argument. 158 __ li(argcnt, -1); 159 // arg_c points to 3rd C argument 160 __ addi(arg_c, target_sp, _abi(carg_3)); 161 // no floating-point args parsed so far 162 __ li(fpcnt, 0); 163 164 Label move_intSlot_to_ARG, move_floatSlot_to_FARG; 165 Label loop_start, loop_end; 166 Label do_int, do_long, do_float, do_double, do_dontreachhere, do_object, do_array, do_boxed; 167 168 // signature points to '(' at entry 169 #ifdef ASSERT 170 __ lbz(sig_byte, 0, signature); 171 __ cmplwi(CCR0, sig_byte, '('); 172 __ bne(CCR0, do_dontreachhere); 173 #endif 174 175 __ bind(loop_start); 176 177 __ addi(argcnt, argcnt, 1); 178 __ lbzu(sig_byte, 1, signature); 179 180 __ cmplwi(CCR0, sig_byte, ')'); // end of signature 181 __ beq(CCR0, loop_end); 182 183 __ cmplwi(CCR0, sig_byte, 'B'); // byte 184 __ beq(CCR0, do_int); 185 186 __ cmplwi(CCR0, sig_byte, 'C'); // char 187 __ beq(CCR0, do_int); 188 189 __ cmplwi(CCR0, sig_byte, 'D'); // double 190 __ beq(CCR0, do_double); 191 192 __ cmplwi(CCR0, sig_byte, 'F'); // float 193 __ beq(CCR0, do_float); 194 195 __ cmplwi(CCR0, sig_byte, 'I'); // int 196 __ beq(CCR0, do_int); 197 198 __ cmplwi(CCR0, sig_byte, 'J'); // long 199 __ beq(CCR0, do_long); 200 201 __ cmplwi(CCR0, sig_byte, 'S'); // short 202 __ beq(CCR0, do_int); 203 204 __ cmplwi(CCR0, sig_byte, 'Z'); // boolean 205 __ beq(CCR0, do_int); 206 207 __ cmplwi(CCR0, sig_byte, 'L'); // object 208 __ beq(CCR0, do_object); 209 210 __ cmplwi(CCR0, sig_byte, '['); // array 211 __ beq(CCR0, do_array); 212 213 // __ cmplwi(CCR0, sig_byte, 'V'); // void cannot appear since we do not parse the return type 214 // __ beq(CCR0, do_void); 215 216 __ bind(do_dontreachhere); 217 218 __ unimplemented("ShouldNotReachHere in slow_signature_handler", 120); 219 220 __ bind(do_array); 221 222 { 223 Label start_skip, end_skip; 224 225 __ bind(start_skip); 226 __ lbzu(sig_byte, 1, signature); 227 __ cmplwi(CCR0, sig_byte, '['); 228 __ beq(CCR0, start_skip); // skip further brackets 229 __ cmplwi(CCR0, sig_byte, '9'); 230 __ bgt(CCR0, end_skip); // no optional size 231 __ cmplwi(CCR0, sig_byte, '0'); 232 __ bge(CCR0, start_skip); // skip optional size 233 __ bind(end_skip); 234 235 __ cmplwi(CCR0, sig_byte, 'L'); 236 __ beq(CCR0, do_object); // for arrays of objects, the name of the object must be skipped 237 __ b(do_boxed); // otherwise, go directly to do_boxed 238 } 239 240 __ bind(do_object); 241 { 242 Label L; 243 __ bind(L); 244 __ lbzu(sig_byte, 1, signature); 245 __ cmplwi(CCR0, sig_byte, ';'); 246 __ bne(CCR0, L); 247 } 248 // Need to box the Java object here, so we use arg_java (address of 249 // current Java stack slot) as argument and don't dereference it as 250 // in case of ints, floats, etc. 251 Label do_null; 252 __ bind(do_boxed); 253 __ ld(R0,0, arg_java); 254 __ cmpdi(CCR0, R0, 0); 255 __ li(intSlot,0); 256 __ beq(CCR0, do_null); 257 __ mr(intSlot, arg_java); 258 __ bind(do_null); 259 __ std(intSlot, 0, arg_c); 260 __ addi(arg_java, arg_java, -BytesPerWord); 261 __ addi(arg_c, arg_c, BytesPerWord); 262 __ cmplwi(CCR0, argcnt, max_int_register_arguments); 263 __ blt(CCR0, move_intSlot_to_ARG); 264 __ b(loop_start); 265 266 __ bind(do_int); 267 __ lwa(intSlot, 0, arg_java); 268 __ std(intSlot, 0, arg_c); 269 __ addi(arg_java, arg_java, -BytesPerWord); 270 __ addi(arg_c, arg_c, BytesPerWord); 271 __ cmplwi(CCR0, argcnt, max_int_register_arguments); 272 __ blt(CCR0, move_intSlot_to_ARG); 273 __ b(loop_start); 274 275 __ bind(do_long); 276 __ ld(intSlot, -BytesPerWord, arg_java); 277 __ std(intSlot, 0, arg_c); 278 __ addi(arg_java, arg_java, - 2 * BytesPerWord); 279 __ addi(arg_c, arg_c, BytesPerWord); 280 __ cmplwi(CCR0, argcnt, max_int_register_arguments); 281 __ blt(CCR0, move_intSlot_to_ARG); 282 __ b(loop_start); 283 284 __ bind(do_float); 285 __ lfs(floatSlot, 0, arg_java); 286 #if defined(LINUX) 287 // Linux uses ELF ABI. Both original ELF and ELFv2 ABIs have float 288 // in the least significant word of an argument slot. 289 #if defined(VM_LITTLE_ENDIAN) 290 __ stfs(floatSlot, 0, arg_c); 291 #else 292 __ stfs(floatSlot, 4, arg_c); 293 #endif 294 #elif defined(AIX) 295 // Although AIX runs on big endian CPU, float is in most significant 296 // word of an argument slot. 297 __ stfs(floatSlot, 0, arg_c); 298 #else 299 #error "unknown OS" 300 #endif 301 __ addi(arg_java, arg_java, -BytesPerWord); 302 __ addi(arg_c, arg_c, BytesPerWord); 303 __ cmplwi(CCR0, fpcnt, max_fp_register_arguments); 304 __ blt(CCR0, move_floatSlot_to_FARG); 305 __ b(loop_start); 306 307 __ bind(do_double); 308 __ lfd(floatSlot, - BytesPerWord, arg_java); 309 __ stfd(floatSlot, 0, arg_c); 310 __ addi(arg_java, arg_java, - 2 * BytesPerWord); 311 __ addi(arg_c, arg_c, BytesPerWord); 312 __ cmplwi(CCR0, fpcnt, max_fp_register_arguments); 313 __ blt(CCR0, move_floatSlot_to_FARG); 314 __ b(loop_start); 315 316 __ bind(loop_end); 317 318 __ pop_frame(); 319 __ restore_nonvolatile_gprs(R1_SP, _spill_nonvolatiles_neg(r14)); 320 __ restore_LR_CR(R0); 321 322 __ blr(); 323 324 Label move_int_arg, move_float_arg; 325 __ bind(move_int_arg); // each case must consist of 2 instructions (otherwise adapt LogSizeOfTwoInstructions) 326 __ mr(R5_ARG3, intSlot); __ b(loop_start); 327 __ mr(R6_ARG4, intSlot); __ b(loop_start); 328 __ mr(R7_ARG5, intSlot); __ b(loop_start); 329 __ mr(R8_ARG6, intSlot); __ b(loop_start); 330 __ mr(R9_ARG7, intSlot); __ b(loop_start); 331 __ mr(R10_ARG8, intSlot); __ b(loop_start); 332 333 __ bind(move_float_arg); // each case must consist of 2 instructions (otherwise adapt LogSizeOfTwoInstructions) 334 __ fmr(F1_ARG1, floatSlot); __ b(loop_start); 335 __ fmr(F2_ARG2, floatSlot); __ b(loop_start); 336 __ fmr(F3_ARG3, floatSlot); __ b(loop_start); 337 __ fmr(F4_ARG4, floatSlot); __ b(loop_start); 338 __ fmr(F5_ARG5, floatSlot); __ b(loop_start); 339 __ fmr(F6_ARG6, floatSlot); __ b(loop_start); 340 __ fmr(F7_ARG7, floatSlot); __ b(loop_start); 341 __ fmr(F8_ARG8, floatSlot); __ b(loop_start); 342 __ fmr(F9_ARG9, floatSlot); __ b(loop_start); 343 __ fmr(F10_ARG10, floatSlot); __ b(loop_start); 344 __ fmr(F11_ARG11, floatSlot); __ b(loop_start); 345 __ fmr(F12_ARG12, floatSlot); __ b(loop_start); 346 __ fmr(F13_ARG13, floatSlot); __ b(loop_start); 347 348 __ bind(move_intSlot_to_ARG); 349 __ sldi(R0, argcnt, LogSizeOfTwoInstructions); 350 __ load_const(R11_scratch1, move_int_arg); // Label must be bound here. 351 __ add(R11_scratch1, R0, R11_scratch1); 352 __ mtctr(R11_scratch1/*branch_target*/); 353 __ bctr(); 354 __ bind(move_floatSlot_to_FARG); 355 __ sldi(R0, fpcnt, LogSizeOfTwoInstructions); 356 __ addi(fpcnt, fpcnt, 1); 357 __ load_const(R11_scratch1, move_float_arg); // Label must be bound here. 358 __ add(R11_scratch1, R0, R11_scratch1); 359 __ mtctr(R11_scratch1/*branch_target*/); 360 __ bctr(); 361 362 return entry; 363 } 364 365 address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) { 366 // 367 // Registers alive 368 // R3_RET 369 // LR 370 // 371 // Registers updated 372 // R3_RET 373 // 374 375 Label done; 376 address entry = __ pc(); 377 378 switch (type) { 379 case T_BOOLEAN: 380 // convert !=0 to 1 381 __ neg(R0, R3_RET); 382 __ orr(R0, R3_RET, R0); 383 __ srwi(R3_RET, R0, 31); 384 break; 385 case T_BYTE: 386 // sign extend 8 bits 387 __ extsb(R3_RET, R3_RET); 388 break; 389 case T_CHAR: 390 // zero extend 16 bits 391 __ clrldi(R3_RET, R3_RET, 48); 392 break; 393 case T_SHORT: 394 // sign extend 16 bits 395 __ extsh(R3_RET, R3_RET); 396 break; 397 case T_INT: 398 // sign extend 32 bits 399 __ extsw(R3_RET, R3_RET); 400 break; 401 case T_LONG: 402 break; 403 case T_OBJECT: 404 // unbox result if not null 405 __ cmpdi(CCR0, R3_RET, 0); 406 __ beq(CCR0, done); 407 __ ld(R3_RET, 0, R3_RET); 408 __ verify_oop(R3_RET); 409 break; 410 case T_FLOAT: 411 break; 412 case T_DOUBLE: 413 break; 414 case T_VOID: 415 break; 416 default: ShouldNotReachHere(); 417 } 418 419 BIND(done); 420 __ blr(); 421 422 return entry; 423 } 424 425 // Abstract method entry. 426 // 427 address TemplateInterpreterGenerator::generate_abstract_entry(void) { 428 address entry = __ pc(); 429 430 // 431 // Registers alive 432 // R16_thread - JavaThread* 433 // R19_method - callee's method (method to be invoked) 434 // R1_SP - SP prepared such that caller's outgoing args are near top 435 // LR - return address to caller 436 // 437 // Stack layout at this point: 438 // 439 // 0 [TOP_IJAVA_FRAME_ABI] <-- R1_SP 440 // alignment (optional) 441 // [outgoing Java arguments] 442 // ... 443 // PARENT [PARENT_IJAVA_FRAME_ABI] 444 // ... 445 // 446 447 // Can't use call_VM here because we have not set up a new 448 // interpreter state. Make the call to the vm and make it look like 449 // our caller set up the JavaFrameAnchor. 450 __ set_top_ijava_frame_at_SP_as_last_Java_frame(R1_SP, R12_scratch2/*tmp*/); 451 452 // Push a new C frame and save LR. 453 __ save_LR_CR(R0); 454 __ push_frame_reg_args(0, R11_scratch1); 455 456 // This is not a leaf but we have a JavaFrameAnchor now and we will 457 // check (create) exceptions afterward so this is ok. 458 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError), 459 R16_thread); 460 461 // Pop the C frame and restore LR. 462 __ pop_frame(); 463 __ restore_LR_CR(R0); 464 465 // Reset JavaFrameAnchor from call_VM_leaf above. 466 __ reset_last_Java_frame(); 467 468 // We don't know our caller, so jump to the general forward exception stub, 469 // which will also pop our full frame off. Satisfy the interface of 470 // SharedRuntime::generate_forward_exception() 471 __ load_const_optimized(R11_scratch1, StubRoutines::forward_exception_entry(), R0); 472 __ mtctr(R11_scratch1); 473 __ bctr(); 474 475 return entry; 476 } 477 478 // Interpreter intrinsic for WeakReference.get(). 479 // 1. Don't push a full blown frame and go on dispatching, but fetch the value 480 // into R8 and return quickly 481 // 2. If G1 is active we *must* execute this intrinsic for corrrectness: 482 // It contains a GC barrier which puts the reference into the satb buffer 483 // to indicate that someone holds a strong reference to the object the 484 // weak ref points to! 485 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) { 486 // Code: _aload_0, _getfield, _areturn 487 // parameter size = 1 488 // 489 // The code that gets generated by this routine is split into 2 parts: 490 // 1. the "intrinsified" code for G1 (or any SATB based GC), 491 // 2. the slow path - which is an expansion of the regular method entry. 492 // 493 // Notes: 494 // * In the G1 code we do not check whether we need to block for 495 // a safepoint. If G1 is enabled then we must execute the specialized 496 // code for Reference.get (except when the Reference object is null) 497 // so that we can log the value in the referent field with an SATB 498 // update buffer. 499 // If the code for the getfield template is modified so that the 500 // G1 pre-barrier code is executed when the current method is 501 // Reference.get() then going through the normal method entry 502 // will be fine. 503 // * The G1 code can, however, check the receiver object (the instance 504 // of java.lang.Reference) and jump to the slow path if null. If the 505 // Reference object is null then we obviously cannot fetch the referent 506 // and so we don't need to call the G1 pre-barrier. Thus we can use the 507 // regular method entry code to generate the NPE. 508 // 509 510 if (UseG1GC) { 511 address entry = __ pc(); 512 513 const int referent_offset = java_lang_ref_Reference::referent_offset; 514 guarantee(referent_offset > 0, "referent offset not initialized"); 515 516 Label slow_path; 517 518 // Debugging not possible, so can't use __ skip_if_jvmti_mode(slow_path, GR31_SCRATCH); 519 520 // In the G1 code we don't check if we need to reach a safepoint. We 521 // continue and the thread will safepoint at the next bytecode dispatch. 522 523 // If the receiver is null then it is OK to jump to the slow path. 524 __ ld(R3_RET, Interpreter::stackElementSize, R15_esp); // get receiver 525 526 // Check if receiver == NULL and go the slow path. 527 __ cmpdi(CCR0, R3_RET, 0); 528 __ beq(CCR0, slow_path); 529 530 // Load the value of the referent field. 531 __ load_heap_oop(R3_RET, referent_offset, R3_RET); 532 533 // Generate the G1 pre-barrier code to log the value of 534 // the referent field in an SATB buffer. Note with 535 // these parameters the pre-barrier does not generate 536 // the load of the previous value. 537 538 // Restore caller sp for c2i case. 539 #ifdef ASSERT 540 __ ld(R9_ARG7, 0, R1_SP); 541 __ ld(R10_ARG8, 0, R21_sender_SP); 542 __ cmpd(CCR0, R9_ARG7, R10_ARG8); 543 __ asm_assert_eq("backlink", 0x544); 544 #endif // ASSERT 545 __ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started. 546 547 __ g1_write_barrier_pre(noreg, // obj 548 noreg, // offset 549 R3_RET, // pre_val 550 R11_scratch1, // tmp 551 R12_scratch2, // tmp 552 true); // needs_frame 553 554 __ blr(); 555 556 // Generate regular method entry. 557 __ bind(slow_path); 558 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals), R11_scratch1); 559 return entry; 560 } 561 562 return NULL; 563 } 564 565 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { 566 address entry = __ pc(); 567 568 // Expression stack must be empty before entering the VM if an 569 // exception happened. 570 __ empty_expression_stack(); 571 // Throw exception. 572 __ call_VM(noreg, 573 CAST_FROM_FN_PTR(address, 574 InterpreterRuntime::throw_StackOverflowError)); 575 return entry; 576 } 577 578 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char* name) { 579 address entry = __ pc(); 580 __ empty_expression_stack(); 581 __ load_const_optimized(R4_ARG2, (address) name); 582 // Index is in R17_tos. 583 __ mr(R5_ARG3, R17_tos); 584 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException)); 585 return entry; 586 } 587 588 #if 0 589 // Call special ClassCastException constructor taking object to cast 590 // and target class as arguments. 591 address TemplateInterpreterGenerator::generate_ClassCastException_verbose_handler() { 592 address entry = __ pc(); 593 594 // Expression stack must be empty before entering the VM if an 595 // exception happened. 596 __ empty_expression_stack(); 597 598 // Thread will be loaded to R3_ARG1. 599 // Target class oop is in register R5_ARG3 by convention! 600 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ClassCastException_verbose), R17_tos, R5_ARG3); 601 // Above call must not return here since exception pending. 602 DEBUG_ONLY(__ should_not_reach_here();) 603 return entry; 604 } 605 #endif 606 607 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { 608 address entry = __ pc(); 609 // Expression stack must be empty before entering the VM if an 610 // exception happened. 611 __ empty_expression_stack(); 612 613 // Load exception object. 614 // Thread will be loaded to R3_ARG1. 615 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ClassCastException), R17_tos); 616 #ifdef ASSERT 617 // Above call must not return here since exception pending. 618 __ should_not_reach_here(); 619 #endif 620 return entry; 621 } 622 623 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) { 624 address entry = __ pc(); 625 //__ untested("generate_exception_handler_common"); 626 Register Rexception = R17_tos; 627 628 // Expression stack must be empty before entering the VM if an exception happened. 629 __ empty_expression_stack(); 630 631 __ load_const_optimized(R4_ARG2, (address) name, R11_scratch1); 632 if (pass_oop) { 633 __ mr(R5_ARG3, Rexception); 634 __ call_VM(Rexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), false); 635 } else { 636 __ load_const_optimized(R5_ARG3, (address) message, R11_scratch1); 637 __ call_VM(Rexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), false); 638 } 639 640 // Throw exception. 641 __ mr(R3_ARG1, Rexception); 642 __ load_const_optimized(R11_scratch1, Interpreter::throw_exception_entry(), R12_scratch2); 643 __ mtctr(R11_scratch1); 644 __ bctr(); 645 646 return entry; 647 } 648 649 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) { 650 address entry = __ pc(); 651 __ unimplemented("generate_continuation_for"); 652 return entry; 653 } 654 655 // This entry is returned to when a call returns to the interpreter. 656 // When we arrive here, we expect that the callee stack frame is already popped. 657 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) { 658 address entry = __ pc(); 659 660 // Move the value out of the return register back to the TOS cache of current frame. 661 switch (state) { 662 case ltos: 663 case btos: 664 case ztos: 665 case ctos: 666 case stos: 667 case atos: 668 case itos: __ mr(R17_tos, R3_RET); break; // RET -> TOS cache 669 case ftos: 670 case dtos: __ fmr(F15_ftos, F1_RET); break; // TOS cache -> GR_FRET 671 case vtos: break; // Nothing to do, this was a void return. 672 default : ShouldNotReachHere(); 673 } 674 675 __ restore_interpreter_state(R11_scratch1); // Sets R11_scratch1 = fp. 676 __ ld(R12_scratch2, _ijava_state_neg(top_frame_sp), R11_scratch1); 677 __ resize_frame_absolute(R12_scratch2, R11_scratch1, R0); 678 679 // Compiled code destroys templateTableBase, reload. 680 __ load_const_optimized(R25_templateTableBase, (address)Interpreter::dispatch_table((TosState)0), R12_scratch2); 681 682 if (state == atos) { 683 __ profile_return_type(R3_RET, R11_scratch1, R12_scratch2); 684 } 685 686 const Register cache = R11_scratch1; 687 const Register size = R12_scratch2; 688 __ get_cache_and_index_at_bcp(cache, 1, index_size); 689 690 // Get least significant byte of 64 bit value: 691 #if defined(VM_LITTLE_ENDIAN) 692 __ lbz(size, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()), cache); 693 #else 694 __ lbz(size, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()) + 7, cache); 695 #endif 696 __ sldi(size, size, Interpreter::logStackElementSize); 697 __ add(R15_esp, R15_esp, size); 698 __ dispatch_next(state, step); 699 return entry; 700 } 701 702 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) { 703 address entry = __ pc(); 704 // If state != vtos, we're returning from a native method, which put it's result 705 // into the result register. So move the value out of the return register back 706 // to the TOS cache of current frame. 707 708 switch (state) { 709 case ltos: 710 case btos: 711 case ztos: 712 case ctos: 713 case stos: 714 case atos: 715 case itos: __ mr(R17_tos, R3_RET); break; // GR_RET -> TOS cache 716 case ftos: 717 case dtos: __ fmr(F15_ftos, F1_RET); break; // TOS cache -> GR_FRET 718 case vtos: break; // Nothing to do, this was a void return. 719 default : ShouldNotReachHere(); 720 } 721 722 // Load LcpoolCache @@@ should be already set! 723 __ get_constant_pool_cache(R27_constPoolCache); 724 725 // Handle a pending exception, fall through if none. 726 __ check_and_forward_exception(R11_scratch1, R12_scratch2); 727 728 // Start executing bytecodes. 729 __ dispatch_next(state, step); 730 731 return entry; 732 } 733 734 address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) { 735 address entry = __ pc(); 736 737 __ push(state); 738 __ call_VM(noreg, runtime_entry); 739 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos)); 740 741 return entry; 742 } 743 744 // Helpers for commoning out cases in the various type of method entries. 745 746 // Increment invocation count & check for overflow. 747 // 748 // Note: checking for negative value instead of overflow 749 // so we have a 'sticky' overflow test. 750 // 751 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) { 752 // Note: In tiered we increment either counters in method or in MDO depending if we're profiling or not. 753 Register Rscratch1 = R11_scratch1; 754 Register Rscratch2 = R12_scratch2; 755 Register R3_counters = R3_ARG1; 756 Label done; 757 758 if (TieredCompilation) { 759 const int increment = InvocationCounter::count_increment; 760 Label no_mdo; 761 if (ProfileInterpreter) { 762 const Register Rmdo = R3_counters; 763 // If no method data exists, go to profile_continue. 764 __ ld(Rmdo, in_bytes(Method::method_data_offset()), R19_method); 765 __ cmpdi(CCR0, Rmdo, 0); 766 __ beq(CCR0, no_mdo); 767 768 // Increment invocation counter in the MDO. 769 const int mdo_ic_offs = in_bytes(MethodData::invocation_counter_offset()) + in_bytes(InvocationCounter::counter_offset()); 770 __ lwz(Rscratch2, mdo_ic_offs, Rmdo); 771 __ lwz(Rscratch1, in_bytes(MethodData::invoke_mask_offset()), Rmdo); 772 __ addi(Rscratch2, Rscratch2, increment); 773 __ stw(Rscratch2, mdo_ic_offs, Rmdo); 774 __ and_(Rscratch1, Rscratch2, Rscratch1); 775 __ bne(CCR0, done); 776 __ b(*overflow); 777 } 778 779 // Increment counter in MethodCounters*. 780 const int mo_ic_offs = in_bytes(MethodCounters::invocation_counter_offset()) + in_bytes(InvocationCounter::counter_offset()); 781 __ bind(no_mdo); 782 __ get_method_counters(R19_method, R3_counters, done); 783 __ lwz(Rscratch2, mo_ic_offs, R3_counters); 784 __ lwz(Rscratch1, in_bytes(MethodCounters::invoke_mask_offset()), R3_counters); 785 __ addi(Rscratch2, Rscratch2, increment); 786 __ stw(Rscratch2, mo_ic_offs, R3_counters); 787 __ and_(Rscratch1, Rscratch2, Rscratch1); 788 __ beq(CCR0, *overflow); 789 790 __ bind(done); 791 792 } else { 793 794 // Update standard invocation counters. 795 Register Rsum_ivc_bec = R4_ARG2; 796 __ get_method_counters(R19_method, R3_counters, done); 797 __ increment_invocation_counter(R3_counters, Rsum_ivc_bec, R12_scratch2); 798 // Increment interpreter invocation counter. 799 if (ProfileInterpreter) { // %%% Merge this into methodDataOop. 800 __ lwz(R12_scratch2, in_bytes(MethodCounters::interpreter_invocation_counter_offset()), R3_counters); 801 __ addi(R12_scratch2, R12_scratch2, 1); 802 __ stw(R12_scratch2, in_bytes(MethodCounters::interpreter_invocation_counter_offset()), R3_counters); 803 } 804 // Check if we must create a method data obj. 805 if (ProfileInterpreter && profile_method != NULL) { 806 const Register profile_limit = Rscratch1; 807 __ lwz(profile_limit, in_bytes(MethodCounters::interpreter_profile_limit_offset()), R3_counters); 808 // Test to see if we should create a method data oop. 809 __ cmpw(CCR0, Rsum_ivc_bec, profile_limit); 810 __ blt(CCR0, *profile_method_continue); 811 // If no method data exists, go to profile_method. 812 __ test_method_data_pointer(*profile_method); 813 } 814 // Finally check for counter overflow. 815 if (overflow) { 816 const Register invocation_limit = Rscratch1; 817 __ lwz(invocation_limit, in_bytes(MethodCounters::interpreter_invocation_limit_offset()), R3_counters); 818 __ cmpw(CCR0, Rsum_ivc_bec, invocation_limit); 819 __ bge(CCR0, *overflow); 820 } 821 822 __ bind(done); 823 } 824 } 825 826 // Generate code to initiate compilation on invocation counter overflow. 827 void TemplateInterpreterGenerator::generate_counter_overflow(Label& continue_entry) { 828 // Generate code to initiate compilation on the counter overflow. 829 830 // InterpreterRuntime::frequency_counter_overflow takes one arguments, 831 // which indicates if the counter overflow occurs at a backwards branch (NULL bcp) 832 // We pass zero in. 833 // The call returns the address of the verified entry point for the method or NULL 834 // if the compilation did not complete (either went background or bailed out). 835 // 836 // Unlike the C++ interpreter above: Check exceptions! 837 // Assumption: Caller must set the flag "do_not_unlock_if_sychronized" if the monitor of a sync'ed 838 // method has not yet been created. Thus, no unlocking of a non-existing monitor can occur. 839 840 __ li(R4_ARG2, 0); 841 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), R4_ARG2, true); 842 843 // Returns verified_entry_point or NULL. 844 // We ignore it in any case. 845 __ b(continue_entry); 846 } 847 848 // See if we've got enough room on the stack for locals plus overhead below 849 // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError 850 // without going through the signal handler, i.e., reserved and yellow zones 851 // will not be made usable. The shadow zone must suffice to handle the 852 // overflow. 853 // 854 // Kills Rmem_frame_size, Rscratch1. 855 void TemplateInterpreterGenerator::generate_stack_overflow_check(Register Rmem_frame_size, Register Rscratch1) { 856 Label done; 857 assert_different_registers(Rmem_frame_size, Rscratch1); 858 859 BLOCK_COMMENT("stack_overflow_check_with_compare {"); 860 __ sub(Rmem_frame_size, R1_SP, Rmem_frame_size); 861 __ ld(Rscratch1, thread_(stack_overflow_limit)); 862 __ cmpld(CCR0/*is_stack_overflow*/, Rmem_frame_size, Rscratch1); 863 __ bgt(CCR0/*is_stack_overflow*/, done); 864 865 // The stack overflows. Load target address of the runtime stub and call it. 866 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "generated in wrong order"); 867 __ load_const_optimized(Rscratch1, (StubRoutines::throw_StackOverflowError_entry()), R0); 868 __ mtctr(Rscratch1); 869 // Restore caller_sp. 870 #ifdef ASSERT 871 __ ld(Rscratch1, 0, R1_SP); 872 __ ld(R0, 0, R21_sender_SP); 873 __ cmpd(CCR0, R0, Rscratch1); 874 __ asm_assert_eq("backlink", 0x547); 875 #endif // ASSERT 876 __ mr(R1_SP, R21_sender_SP); 877 __ bctr(); 878 879 __ align(32, 12); 880 __ bind(done); 881 BLOCK_COMMENT("} stack_overflow_check_with_compare"); 882 } 883 884 // Lock the current method, interpreter register window must be set up! 885 void TemplateInterpreterGenerator::lock_method(Register Rflags, Register Rscratch1, Register Rscratch2, bool flags_preloaded) { 886 const Register Robj_to_lock = Rscratch2; 887 888 { 889 if (!flags_preloaded) { 890 __ lwz(Rflags, method_(access_flags)); 891 } 892 893 #ifdef ASSERT 894 // Check if methods needs synchronization. 895 { 896 Label Lok; 897 __ testbitdi(CCR0, R0, Rflags, JVM_ACC_SYNCHRONIZED_BIT); 898 __ btrue(CCR0,Lok); 899 __ stop("method doesn't need synchronization"); 900 __ bind(Lok); 901 } 902 #endif // ASSERT 903 } 904 905 // Get synchronization object to Rscratch2. 906 { 907 Label Lstatic; 908 Label Ldone; 909 910 __ testbitdi(CCR0, R0, Rflags, JVM_ACC_STATIC_BIT); 911 __ btrue(CCR0, Lstatic); 912 913 // Non-static case: load receiver obj from stack and we're done. 914 __ ld(Robj_to_lock, R18_locals); 915 __ b(Ldone); 916 917 __ bind(Lstatic); // Static case: Lock the java mirror 918 // Load mirror from interpreter frame. 919 __ ld(Robj_to_lock, _abi(callers_sp), R1_SP); 920 __ ld(Robj_to_lock, _ijava_state_neg(mirror), Robj_to_lock); 921 922 __ bind(Ldone); 923 __ verify_oop(Robj_to_lock); 924 } 925 926 // Got the oop to lock => execute! 927 __ add_monitor_to_stack(true, Rscratch1, R0); 928 929 __ std(Robj_to_lock, BasicObjectLock::obj_offset_in_bytes(), R26_monitor); 930 __ lock_object(R26_monitor, Robj_to_lock); 931 } 932 933 // Generate a fixed interpreter frame for pure interpreter 934 // and I2N native transition frames. 935 // 936 // Before (stack grows downwards): 937 // 938 // | ... | 939 // |------------- | 940 // | java arg0 | 941 // | ... | 942 // | java argn | 943 // | | <- R15_esp 944 // | | 945 // |--------------| 946 // | abi_112 | 947 // | | <- R1_SP 948 // |==============| 949 // 950 // 951 // After: 952 // 953 // | ... | 954 // | java arg0 |<- R18_locals 955 // | ... | 956 // | java argn | 957 // |--------------| 958 // | | 959 // | java locals | 960 // | | 961 // |--------------| 962 // | abi_48 | 963 // |==============| 964 // | | 965 // | istate | 966 // | | 967 // |--------------| 968 // | monitor |<- R26_monitor 969 // |--------------| 970 // | |<- R15_esp 971 // | expression | 972 // | stack | 973 // | | 974 // |--------------| 975 // | | 976 // | abi_112 |<- R1_SP 977 // |==============| 978 // 979 // The top most frame needs an abi space of 112 bytes. This space is needed, 980 // since we call to c. The c function may spill their arguments to the caller 981 // frame. When we call to java, we don't need these spill slots. In order to save 982 // space on the stack, we resize the caller. However, java locals reside in 983 // the caller frame and the frame has to be increased. The frame_size for the 984 // current frame was calculated based on max_stack as size for the expression 985 // stack. At the call, just a part of the expression stack might be used. 986 // We don't want to waste this space and cut the frame back accordingly. 987 // The resulting amount for resizing is calculated as follows: 988 // resize = (number_of_locals - number_of_arguments) * slot_size 989 // + (R1_SP - R15_esp) + 48 990 // 991 // The size for the callee frame is calculated: 992 // framesize = 112 + max_stack + monitor + state_size 993 // 994 // maxstack: Max number of slots on the expression stack, loaded from the method. 995 // monitor: We statically reserve room for one monitor object. 996 // state_size: We save the current state of the interpreter to this area. 997 // 998 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call, Register Rsize_of_parameters, Register Rsize_of_locals) { 999 Register parent_frame_resize = R6_ARG4, // Frame will grow by this number of bytes. 1000 top_frame_size = R7_ARG5, 1001 Rconst_method = R8_ARG6; 1002 1003 assert_different_registers(Rsize_of_parameters, Rsize_of_locals, parent_frame_resize, top_frame_size); 1004 1005 __ ld(Rconst_method, method_(const)); 1006 __ lhz(Rsize_of_parameters /* number of params */, 1007 in_bytes(ConstMethod::size_of_parameters_offset()), Rconst_method); 1008 if (native_call) { 1009 // If we're calling a native method, we reserve space for the worst-case signature 1010 // handler varargs vector, which is max(Argument::n_register_parameters, parameter_count+2). 1011 // We add two slots to the parameter_count, one for the jni 1012 // environment and one for a possible native mirror. 1013 Label skip_native_calculate_max_stack; 1014 __ addi(top_frame_size, Rsize_of_parameters, 2); 1015 __ cmpwi(CCR0, top_frame_size, Argument::n_register_parameters); 1016 __ bge(CCR0, skip_native_calculate_max_stack); 1017 __ li(top_frame_size, Argument::n_register_parameters); 1018 __ bind(skip_native_calculate_max_stack); 1019 __ sldi(Rsize_of_parameters, Rsize_of_parameters, Interpreter::logStackElementSize); 1020 __ sldi(top_frame_size, top_frame_size, Interpreter::logStackElementSize); 1021 __ sub(parent_frame_resize, R1_SP, R15_esp); // <0, off by Interpreter::stackElementSize! 1022 assert(Rsize_of_locals == noreg, "Rsize_of_locals not initialized"); // Only relevant value is Rsize_of_parameters. 1023 } else { 1024 __ lhz(Rsize_of_locals /* number of params */, in_bytes(ConstMethod::size_of_locals_offset()), Rconst_method); 1025 __ sldi(Rsize_of_parameters, Rsize_of_parameters, Interpreter::logStackElementSize); 1026 __ sldi(Rsize_of_locals, Rsize_of_locals, Interpreter::logStackElementSize); 1027 __ lhz(top_frame_size, in_bytes(ConstMethod::max_stack_offset()), Rconst_method); 1028 __ sub(R11_scratch1, Rsize_of_locals, Rsize_of_parameters); // >=0 1029 __ sub(parent_frame_resize, R1_SP, R15_esp); // <0, off by Interpreter::stackElementSize! 1030 __ sldi(top_frame_size, top_frame_size, Interpreter::logStackElementSize); 1031 __ add(parent_frame_resize, parent_frame_resize, R11_scratch1); 1032 } 1033 1034 // Compute top frame size. 1035 __ addi(top_frame_size, top_frame_size, frame::abi_reg_args_size + frame::ijava_state_size); 1036 1037 // Cut back area between esp and max_stack. 1038 __ addi(parent_frame_resize, parent_frame_resize, frame::abi_minframe_size - Interpreter::stackElementSize); 1039 1040 __ round_to(top_frame_size, frame::alignment_in_bytes); 1041 __ round_to(parent_frame_resize, frame::alignment_in_bytes); 1042 // parent_frame_resize = (locals-parameters) - (ESP-SP-ABI48) Rounded to frame alignment size. 1043 // Enlarge by locals-parameters (not in case of native_call), shrink by ESP-SP-ABI48. 1044 1045 if (!native_call) { 1046 // Stack overflow check. 1047 // Native calls don't need the stack size check since they have no 1048 // expression stack and the arguments are already on the stack and 1049 // we only add a handful of words to the stack. 1050 __ add(R11_scratch1, parent_frame_resize, top_frame_size); 1051 generate_stack_overflow_check(R11_scratch1, R12_scratch2); 1052 } 1053 1054 // Set up interpreter state registers. 1055 1056 __ li(R30_zero, 0); 1057 __ add(R18_locals, R15_esp, Rsize_of_parameters); 1058 __ ld(R27_constPoolCache, in_bytes(ConstMethod::constants_offset()), Rconst_method); 1059 __ ld(R27_constPoolCache, ConstantPool::cache_offset_in_bytes(), R27_constPoolCache); 1060 1061 // Set method data pointer. 1062 if (ProfileInterpreter) { 1063 Label zero_continue; 1064 __ ld(R28_mdx, method_(method_data)); 1065 __ cmpdi(CCR0, R28_mdx, 0); 1066 __ beq(CCR0, zero_continue); 1067 __ addi(R28_mdx, R28_mdx, in_bytes(MethodData::data_offset())); 1068 __ bind(zero_continue); 1069 } 1070 1071 if (native_call) { 1072 __ li(R14_bcp, 0); // Must initialize. 1073 } else { 1074 __ add(R14_bcp, in_bytes(ConstMethod::codes_offset()), Rconst_method); 1075 } 1076 1077 // Resize parent frame. 1078 __ mflr(R12_scratch2); 1079 __ neg(parent_frame_resize, parent_frame_resize); 1080 __ resize_frame(parent_frame_resize, R11_scratch1); 1081 __ std(R12_scratch2, _abi(lr), R1_SP); 1082 1083 // Get mirror and store it in the frame as GC root for this Method*. 1084 __ load_mirror_from_const_method(R12_scratch2, Rconst_method); 1085 1086 __ addi(R26_monitor, R1_SP, - frame::ijava_state_size); 1087 __ addi(R15_esp, R26_monitor, - Interpreter::stackElementSize); 1088 1089 // Store values. 1090 // R15_esp, R14_bcp, R26_monitor, R28_mdx are saved at java calls 1091 // in InterpreterMacroAssembler::call_from_interpreter. 1092 __ std(R19_method, _ijava_state_neg(method), R1_SP); 1093 __ std(R12_scratch2, _ijava_state_neg(mirror), R1_SP); 1094 __ std(R21_sender_SP, _ijava_state_neg(sender_sp), R1_SP); 1095 __ std(R27_constPoolCache, _ijava_state_neg(cpoolCache), R1_SP); 1096 __ std(R18_locals, _ijava_state_neg(locals), R1_SP); 1097 1098 // Note: esp, bcp, monitor, mdx live in registers. Hence, the correct version can only 1099 // be found in the frame after save_interpreter_state is done. This is always true 1100 // for non-top frames. But when a signal occurs, dumping the top frame can go wrong, 1101 // because e.g. frame::interpreter_frame_bcp() will not access the correct value 1102 // (Enhanced Stack Trace). 1103 // The signal handler does not save the interpreter state into the frame. 1104 __ li(R0, 0); 1105 #ifdef ASSERT 1106 // Fill remaining slots with constants. 1107 __ load_const_optimized(R11_scratch1, 0x5afe); 1108 __ load_const_optimized(R12_scratch2, 0xdead); 1109 #endif 1110 // We have to initialize some frame slots for native calls (accessed by GC). 1111 if (native_call) { 1112 __ std(R26_monitor, _ijava_state_neg(monitors), R1_SP); 1113 __ std(R14_bcp, _ijava_state_neg(bcp), R1_SP); 1114 if (ProfileInterpreter) { __ std(R28_mdx, _ijava_state_neg(mdx), R1_SP); } 1115 } 1116 #ifdef ASSERT 1117 else { 1118 __ std(R12_scratch2, _ijava_state_neg(monitors), R1_SP); 1119 __ std(R12_scratch2, _ijava_state_neg(bcp), R1_SP); 1120 __ std(R12_scratch2, _ijava_state_neg(mdx), R1_SP); 1121 } 1122 __ std(R11_scratch1, _ijava_state_neg(ijava_reserved), R1_SP); 1123 __ std(R12_scratch2, _ijava_state_neg(esp), R1_SP); 1124 __ std(R12_scratch2, _ijava_state_neg(lresult), R1_SP); 1125 __ std(R12_scratch2, _ijava_state_neg(fresult), R1_SP); 1126 #endif 1127 __ subf(R12_scratch2, top_frame_size, R1_SP); 1128 __ std(R0, _ijava_state_neg(oop_tmp), R1_SP); 1129 __ std(R12_scratch2, _ijava_state_neg(top_frame_sp), R1_SP); 1130 1131 // Push top frame. 1132 __ push_frame(top_frame_size, R11_scratch1); 1133 } 1134 1135 // End of helpers 1136 1137 address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) { 1138 if (!Interpreter::math_entry_available(kind)) { 1139 NOT_PRODUCT(__ should_not_reach_here();) 1140 return NULL; 1141 } 1142 1143 address entry = __ pc(); 1144 1145 __ lfd(F1_RET, Interpreter::stackElementSize, R15_esp); 1146 1147 // Pop c2i arguments (if any) off when we return. 1148 #ifdef ASSERT 1149 __ ld(R9_ARG7, 0, R1_SP); 1150 __ ld(R10_ARG8, 0, R21_sender_SP); 1151 __ cmpd(CCR0, R9_ARG7, R10_ARG8); 1152 __ asm_assert_eq("backlink", 0x545); 1153 #endif // ASSERT 1154 __ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started. 1155 1156 if (kind == Interpreter::java_lang_math_sqrt) { 1157 __ fsqrt(F1_RET, F1_RET); 1158 } else if (kind == Interpreter::java_lang_math_abs) { 1159 __ fabs(F1_RET, F1_RET); 1160 } else { 1161 ShouldNotReachHere(); 1162 } 1163 1164 // And we're done. 1165 __ blr(); 1166 1167 __ flush(); 1168 1169 return entry; 1170 } 1171 1172 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { 1173 // Quick & dirty stack overflow checking: bang the stack & handle trap. 1174 // Note that we do the banging after the frame is setup, since the exception 1175 // handling code expects to find a valid interpreter frame on the stack. 1176 // Doing the banging earlier fails if the caller frame is not an interpreter 1177 // frame. 1178 // (Also, the exception throwing code expects to unlock any synchronized 1179 // method receiever, so do the banging after locking the receiver.) 1180 1181 // Bang each page in the shadow zone. We can't assume it's been done for 1182 // an interpreter frame with greater than a page of locals, so each page 1183 // needs to be checked. Only true for non-native. 1184 if (UseStackBanging) { 1185 const int page_size = os::vm_page_size(); 1186 const int n_shadow_pages = ((int)JavaThread::stack_shadow_zone_size()) / page_size; 1187 const int start_page = native_call ? n_shadow_pages : 1; 1188 BLOCK_COMMENT("bang_stack_shadow_pages:"); 1189 for (int pages = start_page; pages <= n_shadow_pages; pages++) { 1190 __ bang_stack_with_offset(pages*page_size); 1191 } 1192 } 1193 } 1194 1195 // Interpreter stub for calling a native method. (asm interpreter) 1196 // This sets up a somewhat different looking stack for calling the 1197 // native method than the typical interpreter frame setup. 1198 // 1199 // On entry: 1200 // R19_method - method 1201 // R16_thread - JavaThread* 1202 // R15_esp - intptr_t* sender tos 1203 // 1204 // abstract stack (grows up) 1205 // [ IJava (caller of JNI callee) ] <-- ASP 1206 // ... 1207 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) { 1208 1209 address entry = __ pc(); 1210 1211 const bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 1212 1213 // ----------------------------------------------------------------------------- 1214 // Allocate a new frame that represents the native callee (i2n frame). 1215 // This is not a full-blown interpreter frame, but in particular, the 1216 // following registers are valid after this: 1217 // - R19_method 1218 // - R18_local (points to start of arguments to native function) 1219 // 1220 // abstract stack (grows up) 1221 // [ IJava (caller of JNI callee) ] <-- ASP 1222 // ... 1223 1224 const Register signature_handler_fd = R11_scratch1; 1225 const Register pending_exception = R0; 1226 const Register result_handler_addr = R31; 1227 const Register native_method_fd = R11_scratch1; 1228 const Register access_flags = R22_tmp2; 1229 const Register active_handles = R11_scratch1; // R26_monitor saved to state. 1230 const Register sync_state = R12_scratch2; 1231 const Register sync_state_addr = sync_state; // Address is dead after use. 1232 const Register suspend_flags = R11_scratch1; 1233 1234 //============================================================================= 1235 // Allocate new frame and initialize interpreter state. 1236 1237 Label exception_return; 1238 Label exception_return_sync_check; 1239 Label stack_overflow_return; 1240 1241 // Generate new interpreter state and jump to stack_overflow_return in case of 1242 // a stack overflow. 1243 //generate_compute_interpreter_state(stack_overflow_return); 1244 1245 Register size_of_parameters = R22_tmp2; 1246 1247 generate_fixed_frame(true, size_of_parameters, noreg /* unused */); 1248 1249 //============================================================================= 1250 // Increment invocation counter. On overflow, entry to JNI method 1251 // will be compiled. 1252 Label invocation_counter_overflow, continue_after_compile; 1253 if (inc_counter) { 1254 if (synchronized) { 1255 // Since at this point in the method invocation the exception handler 1256 // would try to exit the monitor of synchronized methods which hasn't 1257 // been entered yet, we set the thread local variable 1258 // _do_not_unlock_if_synchronized to true. If any exception was thrown by 1259 // runtime, exception handling i.e. unlock_if_synchronized_method will 1260 // check this thread local flag. 1261 // This flag has two effects, one is to force an unwind in the topmost 1262 // interpreter frame and not perform an unlock while doing so. 1263 __ li(R0, 1); 1264 __ stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); 1265 } 1266 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); 1267 1268 BIND(continue_after_compile); 1269 } 1270 1271 bang_stack_shadow_pages(true); 1272 1273 if (inc_counter) { 1274 // Reset the _do_not_unlock_if_synchronized flag. 1275 if (synchronized) { 1276 __ li(R0, 0); 1277 __ stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); 1278 } 1279 } 1280 1281 // access_flags = method->access_flags(); 1282 // Load access flags. 1283 assert(access_flags->is_nonvolatile(), 1284 "access_flags must be in a non-volatile register"); 1285 // Type check. 1286 assert(4 == sizeof(AccessFlags), "unexpected field size"); 1287 __ lwz(access_flags, method_(access_flags)); 1288 1289 // We don't want to reload R19_method and access_flags after calls 1290 // to some helper functions. 1291 assert(R19_method->is_nonvolatile(), 1292 "R19_method must be a non-volatile register"); 1293 1294 // Check for synchronized methods. Must happen AFTER invocation counter 1295 // check, so method is not locked if counter overflows. 1296 1297 if (synchronized) { 1298 lock_method(access_flags, R11_scratch1, R12_scratch2, true); 1299 1300 // Update monitor in state. 1301 __ ld(R11_scratch1, 0, R1_SP); 1302 __ std(R26_monitor, _ijava_state_neg(monitors), R11_scratch1); 1303 } 1304 1305 // jvmti/jvmpi support 1306 __ notify_method_entry(); 1307 1308 //============================================================================= 1309 // Get and call the signature handler. 1310 1311 __ ld(signature_handler_fd, method_(signature_handler)); 1312 Label call_signature_handler; 1313 1314 __ cmpdi(CCR0, signature_handler_fd, 0); 1315 __ bne(CCR0, call_signature_handler); 1316 1317 // Method has never been called. Either generate a specialized 1318 // handler or point to the slow one. 1319 // 1320 // Pass parameter 'false' to avoid exception check in call_VM. 1321 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), R19_method, false); 1322 1323 // Check for an exception while looking up the target method. If we 1324 // incurred one, bail. 1325 __ ld(pending_exception, thread_(pending_exception)); 1326 __ cmpdi(CCR0, pending_exception, 0); 1327 __ bne(CCR0, exception_return_sync_check); // Has pending exception. 1328 1329 // Reload signature handler, it may have been created/assigned in the meanwhile. 1330 __ ld(signature_handler_fd, method_(signature_handler)); 1331 __ twi_0(signature_handler_fd); // Order wrt. load of klass mirror and entry point (isync is below). 1332 1333 BIND(call_signature_handler); 1334 1335 // Before we call the signature handler we push a new frame to 1336 // protect the interpreter frame volatile registers when we return 1337 // from jni but before we can get back to Java. 1338 1339 // First set the frame anchor while the SP/FP registers are 1340 // convenient and the slow signature handler can use this same frame 1341 // anchor. 1342 1343 // We have a TOP_IJAVA_FRAME here, which belongs to us. 1344 __ set_top_ijava_frame_at_SP_as_last_Java_frame(R1_SP, R12_scratch2/*tmp*/); 1345 1346 // Now the interpreter frame (and its call chain) have been 1347 // invalidated and flushed. We are now protected against eager 1348 // being enabled in native code. Even if it goes eager the 1349 // registers will be reloaded as clean and we will invalidate after 1350 // the call so no spurious flush should be possible. 1351 1352 // Call signature handler and pass locals address. 1353 // 1354 // Our signature handlers copy required arguments to the C stack 1355 // (outgoing C args), R3_ARG1 to R10_ARG8, and FARG1 to FARG13. 1356 __ mr(R3_ARG1, R18_locals); 1357 #if !defined(ABI_ELFv2) 1358 __ ld(signature_handler_fd, 0, signature_handler_fd); 1359 #endif 1360 1361 __ call_stub(signature_handler_fd); 1362 1363 // Remove the register parameter varargs slots we allocated in 1364 // compute_interpreter_state. SP+16 ends up pointing to the ABI 1365 // outgoing argument area. 1366 // 1367 // Not needed on PPC64. 1368 //__ add(SP, SP, Argument::n_register_parameters*BytesPerWord); 1369 1370 assert(result_handler_addr->is_nonvolatile(), "result_handler_addr must be in a non-volatile register"); 1371 // Save across call to native method. 1372 __ mr(result_handler_addr, R3_RET); 1373 1374 __ isync(); // Acquire signature handler before trying to fetch the native entry point and klass mirror. 1375 1376 // Set up fixed parameters and call the native method. 1377 // If the method is static, get mirror into R4_ARG2. 1378 { 1379 Label method_is_not_static; 1380 // Access_flags is non-volatile and still, no need to restore it. 1381 1382 // Restore access flags. 1383 __ testbitdi(CCR0, R0, access_flags, JVM_ACC_STATIC_BIT); 1384 __ bfalse(CCR0, method_is_not_static); 1385 1386 __ ld(R11_scratch1, _abi(callers_sp), R1_SP); 1387 // Load mirror from interpreter frame. 1388 __ ld(R12_scratch2, _ijava_state_neg(mirror), R11_scratch1); 1389 // R4_ARG2 = &state->_oop_temp; 1390 __ addi(R4_ARG2, R11_scratch1, _ijava_state_neg(oop_tmp)); 1391 __ std(R12_scratch2/*mirror*/, _ijava_state_neg(oop_tmp), R11_scratch1); 1392 BIND(method_is_not_static); 1393 } 1394 1395 // At this point, arguments have been copied off the stack into 1396 // their JNI positions. Oops are boxed in-place on the stack, with 1397 // handles copied to arguments. The result handler address is in a 1398 // register. 1399 1400 // Pass JNIEnv address as first parameter. 1401 __ addir(R3_ARG1, thread_(jni_environment)); 1402 1403 // Load the native_method entry before we change the thread state. 1404 __ ld(native_method_fd, method_(native_function)); 1405 1406 //============================================================================= 1407 // Transition from _thread_in_Java to _thread_in_native. As soon as 1408 // we make this change the safepoint code needs to be certain that 1409 // the last Java frame we established is good. The pc in that frame 1410 // just needs to be near here not an actual return address. 1411 1412 // We use release_store_fence to update values like the thread state, where 1413 // we don't want the current thread to continue until all our prior memory 1414 // accesses (including the new thread state) are visible to other threads. 1415 __ li(R0, _thread_in_native); 1416 __ release(); 1417 1418 // TODO PPC port assert(4 == JavaThread::sz_thread_state(), "unexpected field size"); 1419 __ stw(R0, thread_(thread_state)); 1420 1421 if (UseMembar) { 1422 __ fence(); 1423 } 1424 1425 //============================================================================= 1426 // Call the native method. Argument registers must not have been 1427 // overwritten since "__ call_stub(signature_handler);" (except for 1428 // ARG1 and ARG2 for static methods). 1429 __ call_c(native_method_fd); 1430 1431 __ li(R0, 0); 1432 __ ld(R11_scratch1, 0, R1_SP); 1433 __ std(R3_RET, _ijava_state_neg(lresult), R11_scratch1); 1434 __ stfd(F1_RET, _ijava_state_neg(fresult), R11_scratch1); 1435 __ std(R0/*mirror*/, _ijava_state_neg(oop_tmp), R11_scratch1); // reset 1436 1437 // Note: C++ interpreter needs the following here: 1438 // The frame_manager_lr field, which we use for setting the last 1439 // java frame, gets overwritten by the signature handler. Restore 1440 // it now. 1441 //__ get_PC_trash_LR(R11_scratch1); 1442 //__ std(R11_scratch1, _top_ijava_frame_abi(frame_manager_lr), R1_SP); 1443 1444 // Because of GC R19_method may no longer be valid. 1445 1446 // Block, if necessary, before resuming in _thread_in_Java state. 1447 // In order for GC to work, don't clear the last_Java_sp until after 1448 // blocking. 1449 1450 //============================================================================= 1451 // Switch thread to "native transition" state before reading the 1452 // synchronization state. This additional state is necessary 1453 // because reading and testing the synchronization state is not 1454 // atomic w.r.t. GC, as this scenario demonstrates: Java thread A, 1455 // in _thread_in_native state, loads _not_synchronized and is 1456 // preempted. VM thread changes sync state to synchronizing and 1457 // suspends threads for GC. Thread A is resumed to finish this 1458 // native method, but doesn't block here since it didn't see any 1459 // synchronization in progress, and escapes. 1460 1461 // We use release_store_fence to update values like the thread state, where 1462 // we don't want the current thread to continue until all our prior memory 1463 // accesses (including the new thread state) are visible to other threads. 1464 __ li(R0/*thread_state*/, _thread_in_native_trans); 1465 __ release(); 1466 __ stw(R0/*thread_state*/, thread_(thread_state)); 1467 if (UseMembar) { 1468 __ fence(); 1469 } 1470 // Write serialization page so that the VM thread can do a pseudo remote 1471 // membar. We use the current thread pointer to calculate a thread 1472 // specific offset to write to within the page. This minimizes bus 1473 // traffic due to cache line collision. 1474 else { 1475 __ serialize_memory(R16_thread, R11_scratch1, R12_scratch2); 1476 } 1477 1478 // Now before we return to java we must look for a current safepoint 1479 // (a new safepoint can not start since we entered native_trans). 1480 // We must check here because a current safepoint could be modifying 1481 // the callers registers right this moment. 1482 1483 // Acquire isn't strictly necessary here because of the fence, but 1484 // sync_state is declared to be volatile, so we do it anyway 1485 // (cmp-br-isync on one path, release (same as acquire on PPC64) on the other path). 1486 int sync_state_offs = __ load_const_optimized(sync_state_addr, SafepointSynchronize::address_of_state(), /*temp*/R0, true); 1487 1488 // TODO PPC port assert(4 == SafepointSynchronize::sz_state(), "unexpected field size"); 1489 __ lwz(sync_state, sync_state_offs, sync_state_addr); 1490 1491 // TODO PPC port assert(4 == Thread::sz_suspend_flags(), "unexpected field size"); 1492 __ lwz(suspend_flags, thread_(suspend_flags)); 1493 1494 Label sync_check_done; 1495 Label do_safepoint; 1496 // No synchronization in progress nor yet synchronized. 1497 __ cmpwi(CCR0, sync_state, SafepointSynchronize::_not_synchronized); 1498 // Not suspended. 1499 __ cmpwi(CCR1, suspend_flags, 0); 1500 1501 __ bne(CCR0, do_safepoint); 1502 __ beq(CCR1, sync_check_done); 1503 __ bind(do_safepoint); 1504 __ isync(); 1505 // Block. We do the call directly and leave the current 1506 // last_Java_frame setup undisturbed. We must save any possible 1507 // native result across the call. No oop is present. 1508 1509 __ mr(R3_ARG1, R16_thread); 1510 #if defined(ABI_ELFv2) 1511 __ call_c(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans), 1512 relocInfo::none); 1513 #else 1514 __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, JavaThread::check_special_condition_for_native_trans), 1515 relocInfo::none); 1516 #endif 1517 1518 __ bind(sync_check_done); 1519 1520 //============================================================================= 1521 // <<<<<< Back in Interpreter Frame >>>>> 1522 1523 // We are in thread_in_native_trans here and back in the normal 1524 // interpreter frame. We don't have to do anything special about 1525 // safepoints and we can switch to Java mode anytime we are ready. 1526 1527 // Note: frame::interpreter_frame_result has a dependency on how the 1528 // method result is saved across the call to post_method_exit. For 1529 // native methods it assumes that the non-FPU/non-void result is 1530 // saved in _native_lresult and a FPU result in _native_fresult. If 1531 // this changes then the interpreter_frame_result implementation 1532 // will need to be updated too. 1533 1534 // On PPC64, we have stored the result directly after the native call. 1535 1536 //============================================================================= 1537 // Back in Java 1538 1539 // We use release_store_fence to update values like the thread state, where 1540 // we don't want the current thread to continue until all our prior memory 1541 // accesses (including the new thread state) are visible to other threads. 1542 __ li(R0/*thread_state*/, _thread_in_Java); 1543 __ release(); 1544 __ stw(R0/*thread_state*/, thread_(thread_state)); 1545 if (UseMembar) { 1546 __ fence(); 1547 } 1548 1549 if (CheckJNICalls) { 1550 // clear_pending_jni_exception_check 1551 __ load_const_optimized(R0, 0L); 1552 __ st_ptr(R0, JavaThread::pending_jni_exception_check_fn_offset(), R16_thread); 1553 } 1554 1555 __ reset_last_Java_frame(); 1556 1557 // Jvmdi/jvmpi support. Whether we've got an exception pending or 1558 // not, and whether unlocking throws an exception or not, we notify 1559 // on native method exit. If we do have an exception, we'll end up 1560 // in the caller's context to handle it, so if we don't do the 1561 // notify here, we'll drop it on the floor. 1562 __ notify_method_exit(true/*native method*/, 1563 ilgl /*illegal state (not used for native methods)*/, 1564 InterpreterMacroAssembler::NotifyJVMTI, 1565 false /*check_exceptions*/); 1566 1567 //============================================================================= 1568 // Handle exceptions 1569 1570 if (synchronized) { 1571 // Don't check for exceptions since we're still in the i2n frame. Do that 1572 // manually afterwards. 1573 __ unlock_object(R26_monitor, false); // Can also unlock methods. 1574 } 1575 1576 // Reset active handles after returning from native. 1577 // thread->active_handles()->clear(); 1578 __ ld(active_handles, thread_(active_handles)); 1579 // TODO PPC port assert(4 == JNIHandleBlock::top_size_in_bytes(), "unexpected field size"); 1580 __ li(R0, 0); 1581 __ stw(R0, JNIHandleBlock::top_offset_in_bytes(), active_handles); 1582 1583 Label exception_return_sync_check_already_unlocked; 1584 __ ld(R0/*pending_exception*/, thread_(pending_exception)); 1585 __ cmpdi(CCR0, R0/*pending_exception*/, 0); 1586 __ bne(CCR0, exception_return_sync_check_already_unlocked); 1587 1588 //----------------------------------------------------------------------------- 1589 // No exception pending. 1590 1591 // Move native method result back into proper registers and return. 1592 // Invoke result handler (may unbox/promote). 1593 __ ld(R11_scratch1, 0, R1_SP); 1594 __ ld(R3_RET, _ijava_state_neg(lresult), R11_scratch1); 1595 __ lfd(F1_RET, _ijava_state_neg(fresult), R11_scratch1); 1596 __ call_stub(result_handler_addr); 1597 1598 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ R0, R11_scratch1, R12_scratch2); 1599 1600 // Must use the return pc which was loaded from the caller's frame 1601 // as the VM uses return-pc-patching for deoptimization. 1602 __ mtlr(R0); 1603 __ blr(); 1604 1605 //----------------------------------------------------------------------------- 1606 // An exception is pending. We call into the runtime only if the 1607 // caller was not interpreted. If it was interpreted the 1608 // interpreter will do the correct thing. If it isn't interpreted 1609 // (call stub/compiled code) we will change our return and continue. 1610 1611 BIND(exception_return_sync_check); 1612 1613 if (synchronized) { 1614 // Don't check for exceptions since we're still in the i2n frame. Do that 1615 // manually afterwards. 1616 __ unlock_object(R26_monitor, false); // Can also unlock methods. 1617 } 1618 BIND(exception_return_sync_check_already_unlocked); 1619 1620 const Register return_pc = R31; 1621 1622 __ ld(return_pc, 0, R1_SP); 1623 __ ld(return_pc, _abi(lr), return_pc); 1624 1625 // Get the address of the exception handler. 1626 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), 1627 R16_thread, 1628 return_pc /* return pc */); 1629 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, noreg, R11_scratch1, R12_scratch2); 1630 1631 // Load the PC of the the exception handler into LR. 1632 __ mtlr(R3_RET); 1633 1634 // Load exception into R3_ARG1 and clear pending exception in thread. 1635 __ ld(R3_ARG1/*exception*/, thread_(pending_exception)); 1636 __ li(R4_ARG2, 0); 1637 __ std(R4_ARG2, thread_(pending_exception)); 1638 1639 // Load the original return pc into R4_ARG2. 1640 __ mr(R4_ARG2/*issuing_pc*/, return_pc); 1641 1642 // Return to exception handler. 1643 __ blr(); 1644 1645 //============================================================================= 1646 // Counter overflow. 1647 1648 if (inc_counter) { 1649 // Handle invocation counter overflow. 1650 __ bind(invocation_counter_overflow); 1651 1652 generate_counter_overflow(continue_after_compile); 1653 } 1654 1655 return entry; 1656 } 1657 1658 // Generic interpreted method entry to (asm) interpreter. 1659 // 1660 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) { 1661 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 1662 address entry = __ pc(); 1663 // Generate the code to allocate the interpreter stack frame. 1664 Register Rsize_of_parameters = R4_ARG2, // Written by generate_fixed_frame. 1665 Rsize_of_locals = R5_ARG3; // Written by generate_fixed_frame. 1666 1667 // Does also a stack check to assure this frame fits on the stack. 1668 generate_fixed_frame(false, Rsize_of_parameters, Rsize_of_locals); 1669 1670 // -------------------------------------------------------------------------- 1671 // Zero out non-parameter locals. 1672 // Note: *Always* zero out non-parameter locals as Sparc does. It's not 1673 // worth to ask the flag, just do it. 1674 Register Rslot_addr = R6_ARG4, 1675 Rnum = R7_ARG5; 1676 Label Lno_locals, Lzero_loop; 1677 1678 // Set up the zeroing loop. 1679 __ subf(Rnum, Rsize_of_parameters, Rsize_of_locals); 1680 __ subf(Rslot_addr, Rsize_of_parameters, R18_locals); 1681 __ srdi_(Rnum, Rnum, Interpreter::logStackElementSize); 1682 __ beq(CCR0, Lno_locals); 1683 __ li(R0, 0); 1684 __ mtctr(Rnum); 1685 1686 // The zero locals loop. 1687 __ bind(Lzero_loop); 1688 __ std(R0, 0, Rslot_addr); 1689 __ addi(Rslot_addr, Rslot_addr, -Interpreter::stackElementSize); 1690 __ bdnz(Lzero_loop); 1691 1692 __ bind(Lno_locals); 1693 1694 // -------------------------------------------------------------------------- 1695 // Counter increment and overflow check. 1696 Label invocation_counter_overflow, 1697 profile_method, 1698 profile_method_continue; 1699 if (inc_counter || ProfileInterpreter) { 1700 1701 Register Rdo_not_unlock_if_synchronized_addr = R11_scratch1; 1702 if (synchronized) { 1703 // Since at this point in the method invocation the exception handler 1704 // would try to exit the monitor of synchronized methods which hasn't 1705 // been entered yet, we set the thread local variable 1706 // _do_not_unlock_if_synchronized to true. If any exception was thrown by 1707 // runtime, exception handling i.e. unlock_if_synchronized_method will 1708 // check this thread local flag. 1709 // This flag has two effects, one is to force an unwind in the topmost 1710 // interpreter frame and not perform an unlock while doing so. 1711 __ li(R0, 1); 1712 __ stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); 1713 } 1714 1715 // Argument and return type profiling. 1716 __ profile_parameters_type(R3_ARG1, R4_ARG2, R5_ARG3, R6_ARG4); 1717 1718 // Increment invocation counter and check for overflow. 1719 if (inc_counter) { 1720 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue); 1721 } 1722 1723 __ bind(profile_method_continue); 1724 } 1725 1726 bang_stack_shadow_pages(false); 1727 1728 if (inc_counter || ProfileInterpreter) { 1729 // Reset the _do_not_unlock_if_synchronized flag. 1730 if (synchronized) { 1731 __ li(R0, 0); 1732 __ stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); 1733 } 1734 } 1735 1736 // -------------------------------------------------------------------------- 1737 // Locking of synchronized methods. Must happen AFTER invocation_counter 1738 // check and stack overflow check, so method is not locked if overflows. 1739 if (synchronized) { 1740 lock_method(R3_ARG1, R4_ARG2, R5_ARG3); 1741 } 1742 #ifdef ASSERT 1743 else { 1744 Label Lok; 1745 __ lwz(R0, in_bytes(Method::access_flags_offset()), R19_method); 1746 __ andi_(R0, R0, JVM_ACC_SYNCHRONIZED); 1747 __ asm_assert_eq("method needs synchronization", 0x8521); 1748 __ bind(Lok); 1749 } 1750 #endif // ASSERT 1751 1752 __ verify_thread(); 1753 1754 // -------------------------------------------------------------------------- 1755 // JVMTI support 1756 __ notify_method_entry(); 1757 1758 // -------------------------------------------------------------------------- 1759 // Start executing instructions. 1760 __ dispatch_next(vtos); 1761 1762 // -------------------------------------------------------------------------- 1763 // Out of line counter overflow and MDO creation code. 1764 if (ProfileInterpreter) { 1765 // We have decided to profile this method in the interpreter. 1766 __ bind(profile_method); 1767 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); 1768 __ set_method_data_pointer_for_bcp(); 1769 __ b(profile_method_continue); 1770 } 1771 1772 if (inc_counter) { 1773 // Handle invocation counter overflow. 1774 __ bind(invocation_counter_overflow); 1775 generate_counter_overflow(profile_method_continue); 1776 } 1777 return entry; 1778 } 1779 1780 // CRC32 Intrinsics. 1781 // 1782 // Contract on scratch and work registers. 1783 // ======================================= 1784 // 1785 // On ppc, the register set {R2..R12} is available in the interpreter as scratch/work registers. 1786 // You should, however, keep in mind that {R3_ARG1..R10_ARG8} is the C-ABI argument register set. 1787 // You can't rely on these registers across calls. 1788 // 1789 // The generators for CRC32_update and for CRC32_updateBytes use the 1790 // scratch/work register set internally, passing the work registers 1791 // as arguments to the MacroAssembler emitters as required. 1792 // 1793 // R3_ARG1..R6_ARG4 are preset to hold the incoming java arguments. 1794 // Their contents is not constant but may change according to the requirements 1795 // of the emitted code. 1796 // 1797 // All other registers from the scratch/work register set are used "internally" 1798 // and contain garbage (i.e. unpredictable values) once blr() is reached. 1799 // Basically, only R3_RET contains a defined value which is the function result. 1800 // 1801 /** 1802 * Method entry for static native methods: 1803 * int java.util.zip.CRC32.update(int crc, int b) 1804 */ 1805 address TemplateInterpreterGenerator::generate_CRC32_update_entry() { 1806 if (UseCRC32Intrinsics) { 1807 address start = __ pc(); // Remember stub start address (is rtn value). 1808 Label slow_path; 1809 1810 // Safepoint check 1811 const Register sync_state = R11_scratch1; 1812 int sync_state_offs = __ load_const_optimized(sync_state, SafepointSynchronize::address_of_state(), /*temp*/R0, true); 1813 __ lwz(sync_state, sync_state_offs, sync_state); 1814 __ cmpwi(CCR0, sync_state, SafepointSynchronize::_not_synchronized); 1815 __ bne(CCR0, slow_path); 1816 1817 // We don't generate local frame and don't align stack because 1818 // we not even call stub code (we generate the code inline) 1819 // and there is no safepoint on this path. 1820 1821 // Load java parameters. 1822 // R15_esp is callers operand stack pointer, i.e. it points to the parameters. 1823 const Register argP = R15_esp; 1824 const Register crc = R3_ARG1; // crc value 1825 const Register data = R4_ARG2; // address of java byte value (kernel_crc32 needs address) 1826 const Register dataLen = R5_ARG3; // source data len (1 byte). Not used because calling the single-byte emitter. 1827 const Register table = R6_ARG4; // address of crc32 table 1828 const Register tmp = dataLen; // Reuse unused len register to show we don't actually need a separate tmp here. 1829 1830 BLOCK_COMMENT("CRC32_update {"); 1831 1832 // Arguments are reversed on java expression stack 1833 #ifdef VM_LITTLE_ENDIAN 1834 __ addi(data, argP, 0+1*wordSize); // (stack) address of byte value. Emitter expects address, not value. 1835 // Being passed as an int, the single byte is at offset +0. 1836 #else 1837 __ addi(data, argP, 3+1*wordSize); // (stack) address of byte value. Emitter expects address, not value. 1838 // Being passed from java as an int, the single byte is at offset +3. 1839 #endif 1840 __ lwz(crc, 2*wordSize, argP); // Current crc state, zero extend to 64 bit to have a clean register. 1841 1842 StubRoutines::ppc64::generate_load_crc_table_addr(_masm, table); 1843 __ kernel_crc32_singleByte(crc, data, dataLen, table, tmp); 1844 1845 // Restore caller sp for c2i case and return. 1846 __ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started. 1847 __ blr(); 1848 1849 // Generate a vanilla native entry as the slow path. 1850 BLOCK_COMMENT("} CRC32_update"); 1851 BIND(slow_path); 1852 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), R11_scratch1); 1853 return start; 1854 } 1855 1856 return NULL; 1857 } 1858 1859 // CRC32 Intrinsics. 1860 /** 1861 * Method entry for static native methods: 1862 * int java.util.zip.CRC32.updateBytes( int crc, byte[] b, int off, int len) 1863 * int java.util.zip.CRC32.updateByteBuffer(int crc, long* buf, int off, int len) 1864 */ 1865 address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) { 1866 if (UseCRC32Intrinsics) { 1867 address start = __ pc(); // Remember stub start address (is rtn value). 1868 Label slow_path; 1869 1870 // Safepoint check 1871 const Register sync_state = R11_scratch1; 1872 int sync_state_offs = __ load_const_optimized(sync_state, SafepointSynchronize::address_of_state(), /*temp*/R0, true); 1873 __ lwz(sync_state, sync_state_offs, sync_state); 1874 __ cmpwi(CCR0, sync_state, SafepointSynchronize::_not_synchronized); 1875 __ bne(CCR0, slow_path); 1876 1877 // We don't generate local frame and don't align stack because 1878 // we not even call stub code (we generate the code inline) 1879 // and there is no safepoint on this path. 1880 1881 // Load parameters. 1882 // Z_esp is callers operand stack pointer, i.e. it points to the parameters. 1883 const Register argP = R15_esp; 1884 const Register crc = R3_ARG1; // crc value 1885 const Register data = R4_ARG2; // address of java byte array 1886 const Register dataLen = R5_ARG3; // source data len 1887 const Register table = R6_ARG4; // address of crc32 table 1888 1889 const Register t0 = R9; // scratch registers for crc calculation 1890 const Register t1 = R10; 1891 const Register t2 = R11; 1892 const Register t3 = R12; 1893 1894 const Register tc0 = R2; // registers to hold pre-calculated column addresses 1895 const Register tc1 = R7; 1896 const Register tc2 = R8; 1897 const Register tc3 = table; // table address is reconstructed at the end of kernel_crc32_* emitters 1898 1899 const Register tmp = t0; // Only used very locally to calculate byte buffer address. 1900 1901 // Arguments are reversed on java expression stack. 1902 // Calculate address of start element. 1903 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) { // Used for "updateByteBuffer direct". 1904 BLOCK_COMMENT("CRC32_updateByteBuffer {"); 1905 // crc @ (SP + 5W) (32bit) 1906 // buf @ (SP + 3W) (64bit ptr to long array) 1907 // off @ (SP + 2W) (32bit) 1908 // dataLen @ (SP + 1W) (32bit) 1909 // data = buf + off 1910 __ ld( data, 3*wordSize, argP); // start of byte buffer 1911 __ lwa( tmp, 2*wordSize, argP); // byte buffer offset 1912 __ lwa( dataLen, 1*wordSize, argP); // #bytes to process 1913 __ lwz( crc, 5*wordSize, argP); // current crc state 1914 __ add( data, data, tmp); // Add byte buffer offset. 1915 } else { // Used for "updateBytes update". 1916 BLOCK_COMMENT("CRC32_updateBytes {"); 1917 // crc @ (SP + 4W) (32bit) 1918 // buf @ (SP + 3W) (64bit ptr to byte array) 1919 // off @ (SP + 2W) (32bit) 1920 // dataLen @ (SP + 1W) (32bit) 1921 // data = buf + off + base_offset 1922 __ ld( data, 3*wordSize, argP); // start of byte buffer 1923 __ lwa( tmp, 2*wordSize, argP); // byte buffer offset 1924 __ lwa( dataLen, 1*wordSize, argP); // #bytes to process 1925 __ add( data, data, tmp); // add byte buffer offset 1926 __ lwz( crc, 4*wordSize, argP); // current crc state 1927 __ addi(data, data, arrayOopDesc::base_offset_in_bytes(T_BYTE)); 1928 } 1929 1930 StubRoutines::ppc64::generate_load_crc_table_addr(_masm, table); 1931 1932 // Performance measurements show the 1word and 2word variants to be almost equivalent, 1933 // with very light advantages for the 1word variant. We chose the 1word variant for 1934 // code compactness. 1935 __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, tc0, tc1, tc2, tc3); 1936 1937 // Restore caller sp for c2i case and return. 1938 __ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started. 1939 __ blr(); 1940 1941 // Generate a vanilla native entry as the slow path. 1942 BLOCK_COMMENT("} CRC32_updateBytes(Buffer)"); 1943 BIND(slow_path); 1944 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), R11_scratch1); 1945 return start; 1946 } 1947 1948 return NULL; 1949 } 1950 1951 // Not supported 1952 address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) { 1953 return NULL; 1954 } 1955 1956 // ============================================================================= 1957 // Exceptions 1958 1959 void TemplateInterpreterGenerator::generate_throw_exception() { 1960 Register Rexception = R17_tos, 1961 Rcontinuation = R3_RET; 1962 1963 // -------------------------------------------------------------------------- 1964 // Entry point if an method returns with a pending exception (rethrow). 1965 Interpreter::_rethrow_exception_entry = __ pc(); 1966 { 1967 __ restore_interpreter_state(R11_scratch1); // Sets R11_scratch1 = fp. 1968 __ ld(R12_scratch2, _ijava_state_neg(top_frame_sp), R11_scratch1); 1969 __ resize_frame_absolute(R12_scratch2, R11_scratch1, R0); 1970 1971 // Compiled code destroys templateTableBase, reload. 1972 __ load_const_optimized(R25_templateTableBase, (address)Interpreter::dispatch_table((TosState)0), R11_scratch1); 1973 } 1974 1975 // Entry point if a interpreted method throws an exception (throw). 1976 Interpreter::_throw_exception_entry = __ pc(); 1977 { 1978 __ mr(Rexception, R3_RET); 1979 1980 __ verify_thread(); 1981 __ verify_oop(Rexception); 1982 1983 // Expression stack must be empty before entering the VM in case of an exception. 1984 __ empty_expression_stack(); 1985 // Find exception handler address and preserve exception oop. 1986 // Call C routine to find handler and jump to it. 1987 __ call_VM(Rexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), Rexception); 1988 __ mtctr(Rcontinuation); 1989 // Push exception for exception handler bytecodes. 1990 __ push_ptr(Rexception); 1991 1992 // Jump to exception handler (may be remove activation entry!). 1993 __ bctr(); 1994 } 1995 1996 // If the exception is not handled in the current frame the frame is 1997 // removed and the exception is rethrown (i.e. exception 1998 // continuation is _rethrow_exception). 1999 // 2000 // Note: At this point the bci is still the bxi for the instruction 2001 // which caused the exception and the expression stack is 2002 // empty. Thus, for any VM calls at this point, GC will find a legal 2003 // oop map (with empty expression stack). 2004 2005 // In current activation 2006 // tos: exception 2007 // bcp: exception bcp 2008 2009 // -------------------------------------------------------------------------- 2010 // JVMTI PopFrame support 2011 2012 Interpreter::_remove_activation_preserving_args_entry = __ pc(); 2013 { 2014 // Set the popframe_processing bit in popframe_condition indicating that we are 2015 // currently handling popframe, so that call_VMs that may happen later do not 2016 // trigger new popframe handling cycles. 2017 __ lwz(R11_scratch1, in_bytes(JavaThread::popframe_condition_offset()), R16_thread); 2018 __ ori(R11_scratch1, R11_scratch1, JavaThread::popframe_processing_bit); 2019 __ stw(R11_scratch1, in_bytes(JavaThread::popframe_condition_offset()), R16_thread); 2020 2021 // Empty the expression stack, as in normal exception handling. 2022 __ empty_expression_stack(); 2023 __ unlock_if_synchronized_method(vtos, /* throw_monitor_exception */ false, /* install_monitor_exception */ false); 2024 2025 // Check to see whether we are returning to a deoptimized frame. 2026 // (The PopFrame call ensures that the caller of the popped frame is 2027 // either interpreted or compiled and deoptimizes it if compiled.) 2028 // Note that we don't compare the return PC against the 2029 // deoptimization blob's unpack entry because of the presence of 2030 // adapter frames in C2. 2031 Label Lcaller_not_deoptimized; 2032 Register return_pc = R3_ARG1; 2033 __ ld(return_pc, 0, R1_SP); 2034 __ ld(return_pc, _abi(lr), return_pc); 2035 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), return_pc); 2036 __ cmpdi(CCR0, R3_RET, 0); 2037 __ bne(CCR0, Lcaller_not_deoptimized); 2038 2039 // The deoptimized case. 2040 // In this case, we can't call dispatch_next() after the frame is 2041 // popped, but instead must save the incoming arguments and restore 2042 // them after deoptimization has occurred. 2043 __ ld(R4_ARG2, in_bytes(Method::const_offset()), R19_method); 2044 __ lhz(R4_ARG2 /* number of params */, in_bytes(ConstMethod::size_of_parameters_offset()), R4_ARG2); 2045 __ slwi(R4_ARG2, R4_ARG2, Interpreter::logStackElementSize); 2046 __ addi(R5_ARG3, R18_locals, Interpreter::stackElementSize); 2047 __ subf(R5_ARG3, R4_ARG2, R5_ARG3); 2048 // Save these arguments. 2049 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), R16_thread, R4_ARG2, R5_ARG3); 2050 2051 // Inform deoptimization that it is responsible for restoring these arguments. 2052 __ load_const_optimized(R11_scratch1, JavaThread::popframe_force_deopt_reexecution_bit); 2053 __ stw(R11_scratch1, in_bytes(JavaThread::popframe_condition_offset()), R16_thread); 2054 2055 // Return from the current method into the deoptimization blob. Will eventually 2056 // end up in the deopt interpeter entry, deoptimization prepared everything that 2057 // we will reexecute the call that called us. 2058 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, /*reload return_pc*/ return_pc, R11_scratch1, R12_scratch2); 2059 __ mtlr(return_pc); 2060 __ blr(); 2061 2062 // The non-deoptimized case. 2063 __ bind(Lcaller_not_deoptimized); 2064 2065 // Clear the popframe condition flag. 2066 __ li(R0, 0); 2067 __ stw(R0, in_bytes(JavaThread::popframe_condition_offset()), R16_thread); 2068 2069 // Get out of the current method and re-execute the call that called us. 2070 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ noreg, R11_scratch1, R12_scratch2); 2071 __ restore_interpreter_state(R11_scratch1); 2072 __ ld(R12_scratch2, _ijava_state_neg(top_frame_sp), R11_scratch1); 2073 __ resize_frame_absolute(R12_scratch2, R11_scratch1, R0); 2074 if (ProfileInterpreter) { 2075 __ set_method_data_pointer_for_bcp(); 2076 __ ld(R11_scratch1, 0, R1_SP); 2077 __ std(R28_mdx, _ijava_state_neg(mdx), R11_scratch1); 2078 } 2079 #if INCLUDE_JVMTI 2080 Label L_done; 2081 2082 __ lbz(R11_scratch1, 0, R14_bcp); 2083 __ cmpwi(CCR0, R11_scratch1, Bytecodes::_invokestatic); 2084 __ bne(CCR0, L_done); 2085 2086 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call. 2087 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL. 2088 __ ld(R4_ARG2, 0, R18_locals); 2089 __ MacroAssembler::call_VM(R4_ARG2, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), R4_ARG2, R19_method, R14_bcp, false); 2090 __ restore_interpreter_state(R11_scratch1, /*bcp_and_mdx_only*/ true); 2091 __ cmpdi(CCR0, R4_ARG2, 0); 2092 __ beq(CCR0, L_done); 2093 __ std(R4_ARG2, wordSize, R15_esp); 2094 __ bind(L_done); 2095 #endif // INCLUDE_JVMTI 2096 __ dispatch_next(vtos); 2097 } 2098 // end of JVMTI PopFrame support 2099 2100 // -------------------------------------------------------------------------- 2101 // Remove activation exception entry. 2102 // This is jumped to if an interpreted method can't handle an exception itself 2103 // (we come from the throw/rethrow exception entry above). We're going to call 2104 // into the VM to find the exception handler in the caller, pop the current 2105 // frame and return the handler we calculated. 2106 Interpreter::_remove_activation_entry = __ pc(); 2107 { 2108 __ pop_ptr(Rexception); 2109 __ verify_thread(); 2110 __ verify_oop(Rexception); 2111 __ std(Rexception, in_bytes(JavaThread::vm_result_offset()), R16_thread); 2112 2113 __ unlock_if_synchronized_method(vtos, /* throw_monitor_exception */ false, true); 2114 __ notify_method_exit(false, vtos, InterpreterMacroAssembler::SkipNotifyJVMTI, false); 2115 2116 __ get_vm_result(Rexception); 2117 2118 // We are done with this activation frame; find out where to go next. 2119 // The continuation point will be an exception handler, which expects 2120 // the following registers set up: 2121 // 2122 // RET: exception oop 2123 // ARG2: Issuing PC (see generate_exception_blob()), only used if the caller is compiled. 2124 2125 Register return_pc = R31; // Needs to survive the runtime call. 2126 __ ld(return_pc, 0, R1_SP); 2127 __ ld(return_pc, _abi(lr), return_pc); 2128 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, return_pc); 2129 2130 // Remove the current activation. 2131 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ noreg, R11_scratch1, R12_scratch2); 2132 2133 __ mr(R4_ARG2, return_pc); 2134 __ mtlr(R3_RET); 2135 __ mr(R3_RET, Rexception); 2136 __ blr(); 2137 } 2138 } 2139 2140 // JVMTI ForceEarlyReturn support. 2141 // Returns "in the middle" of a method with a "fake" return value. 2142 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { 2143 2144 Register Rscratch1 = R11_scratch1, 2145 Rscratch2 = R12_scratch2; 2146 2147 address entry = __ pc(); 2148 __ empty_expression_stack(); 2149 2150 __ load_earlyret_value(state, Rscratch1); 2151 2152 __ ld(Rscratch1, in_bytes(JavaThread::jvmti_thread_state_offset()), R16_thread); 2153 // Clear the earlyret state. 2154 __ li(R0, 0); 2155 __ stw(R0, in_bytes(JvmtiThreadState::earlyret_state_offset()), Rscratch1); 2156 2157 __ remove_activation(state, false, false); 2158 // Copied from TemplateTable::_return. 2159 // Restoration of lr done by remove_activation. 2160 switch (state) { 2161 // Narrow result if state is itos but result type is smaller. 2162 case btos: 2163 case ztos: 2164 case ctos: 2165 case stos: 2166 case itos: __ narrow(R17_tos); /* fall through */ 2167 case ltos: 2168 case atos: __ mr(R3_RET, R17_tos); break; 2169 case ftos: 2170 case dtos: __ fmr(F1_RET, F15_ftos); break; 2171 case vtos: // This might be a constructor. Final fields (and volatile fields on PPC64) need 2172 // to get visible before the reference to the object gets stored anywhere. 2173 __ membar(Assembler::StoreStore); break; 2174 default : ShouldNotReachHere(); 2175 } 2176 __ blr(); 2177 2178 return entry; 2179 } // end of ForceEarlyReturn support 2180 2181 //----------------------------------------------------------------------------- 2182 // Helper for vtos entry point generation 2183 2184 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, 2185 address& bep, 2186 address& cep, 2187 address& sep, 2188 address& aep, 2189 address& iep, 2190 address& lep, 2191 address& fep, 2192 address& dep, 2193 address& vep) { 2194 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); 2195 Label L; 2196 2197 aep = __ pc(); __ push_ptr(); __ b(L); 2198 fep = __ pc(); __ push_f(); __ b(L); 2199 dep = __ pc(); __ push_d(); __ b(L); 2200 lep = __ pc(); __ push_l(); __ b(L); 2201 __ align(32, 12, 24); // align L 2202 bep = cep = sep = 2203 iep = __ pc(); __ push_i(); 2204 vep = __ pc(); 2205 __ bind(L); 2206 generate_and_dispatch(t); 2207 } 2208 2209 //----------------------------------------------------------------------------- 2210 2211 // Non-product code 2212 #ifndef PRODUCT 2213 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { 2214 //__ flush_bundle(); 2215 address entry = __ pc(); 2216 2217 const char *bname = NULL; 2218 uint tsize = 0; 2219 switch(state) { 2220 case ftos: 2221 bname = "trace_code_ftos {"; 2222 tsize = 2; 2223 break; 2224 case btos: 2225 bname = "trace_code_btos {"; 2226 tsize = 2; 2227 break; 2228 case ztos: 2229 bname = "trace_code_ztos {"; 2230 tsize = 2; 2231 break; 2232 case ctos: 2233 bname = "trace_code_ctos {"; 2234 tsize = 2; 2235 break; 2236 case stos: 2237 bname = "trace_code_stos {"; 2238 tsize = 2; 2239 break; 2240 case itos: 2241 bname = "trace_code_itos {"; 2242 tsize = 2; 2243 break; 2244 case ltos: 2245 bname = "trace_code_ltos {"; 2246 tsize = 3; 2247 break; 2248 case atos: 2249 bname = "trace_code_atos {"; 2250 tsize = 2; 2251 break; 2252 case vtos: 2253 // Note: In case of vtos, the topmost of stack value could be a int or doubl 2254 // In case of a double (2 slots) we won't see the 2nd stack value. 2255 // Maybe we simply should print the topmost 3 stack slots to cope with the problem. 2256 bname = "trace_code_vtos {"; 2257 tsize = 2; 2258 2259 break; 2260 case dtos: 2261 bname = "trace_code_dtos {"; 2262 tsize = 3; 2263 break; 2264 default: 2265 ShouldNotReachHere(); 2266 } 2267 BLOCK_COMMENT(bname); 2268 2269 // Support short-cut for TraceBytecodesAt. 2270 // Don't call into the VM if we don't want to trace to speed up things. 2271 Label Lskip_vm_call; 2272 if (TraceBytecodesAt > 0 && TraceBytecodesAt < max_intx) { 2273 int offs1 = __ load_const_optimized(R11_scratch1, (address) &TraceBytecodesAt, R0, true); 2274 int offs2 = __ load_const_optimized(R12_scratch2, (address) &BytecodeCounter::_counter_value, R0, true); 2275 __ ld(R11_scratch1, offs1, R11_scratch1); 2276 __ lwa(R12_scratch2, offs2, R12_scratch2); 2277 __ cmpd(CCR0, R12_scratch2, R11_scratch1); 2278 __ blt(CCR0, Lskip_vm_call); 2279 } 2280 2281 __ push(state); 2282 // Load 2 topmost expression stack values. 2283 __ ld(R6_ARG4, tsize*Interpreter::stackElementSize, R15_esp); 2284 __ ld(R5_ARG3, Interpreter::stackElementSize, R15_esp); 2285 __ mflr(R31); 2286 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), /* unused */ R4_ARG2, R5_ARG3, R6_ARG4, false); 2287 __ mtlr(R31); 2288 __ pop(state); 2289 2290 if (TraceBytecodesAt > 0 && TraceBytecodesAt < max_intx) { 2291 __ bind(Lskip_vm_call); 2292 } 2293 __ blr(); 2294 BLOCK_COMMENT("} trace_code"); 2295 return entry; 2296 } 2297 2298 void TemplateInterpreterGenerator::count_bytecode() { 2299 int offs = __ load_const_optimized(R11_scratch1, (address) &BytecodeCounter::_counter_value, R12_scratch2, true); 2300 __ lwz(R12_scratch2, offs, R11_scratch1); 2301 __ addi(R12_scratch2, R12_scratch2, 1); 2302 __ stw(R12_scratch2, offs, R11_scratch1); 2303 } 2304 2305 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { 2306 int offs = __ load_const_optimized(R11_scratch1, (address) &BytecodeHistogram::_counters[t->bytecode()], R12_scratch2, true); 2307 __ lwz(R12_scratch2, offs, R11_scratch1); 2308 __ addi(R12_scratch2, R12_scratch2, 1); 2309 __ stw(R12_scratch2, offs, R11_scratch1); 2310 } 2311 2312 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { 2313 const Register addr = R11_scratch1, 2314 tmp = R12_scratch2; 2315 // Get index, shift out old bytecode, bring in new bytecode, and store it. 2316 // _index = (_index >> log2_number_of_codes) | 2317 // (bytecode << log2_number_of_codes); 2318 int offs1 = __ load_const_optimized(addr, (address)&BytecodePairHistogram::_index, tmp, true); 2319 __ lwz(tmp, offs1, addr); 2320 __ srwi(tmp, tmp, BytecodePairHistogram::log2_number_of_codes); 2321 __ ori(tmp, tmp, ((int) t->bytecode()) << BytecodePairHistogram::log2_number_of_codes); 2322 __ stw(tmp, offs1, addr); 2323 2324 // Bump bucket contents. 2325 // _counters[_index] ++; 2326 int offs2 = __ load_const_optimized(addr, (address)&BytecodePairHistogram::_counters, R0, true); 2327 __ sldi(tmp, tmp, LogBytesPerInt); 2328 __ add(addr, tmp, addr); 2329 __ lwz(tmp, offs2, addr); 2330 __ addi(tmp, tmp, 1); 2331 __ stw(tmp, offs2, addr); 2332 } 2333 2334 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { 2335 // Call a little run-time stub to avoid blow-up for each bytecode. 2336 // The run-time runtime saves the right registers, depending on 2337 // the tosca in-state for the given template. 2338 2339 assert(Interpreter::trace_code(t->tos_in()) != NULL, 2340 "entry must have been generated"); 2341 2342 // Note: we destroy LR here. 2343 __ bl(Interpreter::trace_code(t->tos_in())); 2344 } 2345 2346 void TemplateInterpreterGenerator::stop_interpreter_at() { 2347 Label L; 2348 int offs1 = __ load_const_optimized(R11_scratch1, (address) &StopInterpreterAt, R0, true); 2349 int offs2 = __ load_const_optimized(R12_scratch2, (address) &BytecodeCounter::_counter_value, R0, true); 2350 __ ld(R11_scratch1, offs1, R11_scratch1); 2351 __ lwa(R12_scratch2, offs2, R12_scratch2); 2352 __ cmpd(CCR0, R12_scratch2, R11_scratch1); 2353 __ bne(CCR0, L); 2354 __ illtrap(); 2355 __ bind(L); 2356 } 2357 2358 #endif // !PRODUCT