interp_masm_x86_32.cpp 49.4 KB
Newer Older
D
duke 已提交
1
/*
2
 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
D
duke 已提交
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
19 20 21
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
D
duke 已提交
22 23 24
 *
 */

25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
#include "precompiled.hpp"
#include "interp_masm_x86_32.hpp"
#include "interpreter/interpreter.hpp"
#include "interpreter/interpreterRuntime.hpp"
#include "oops/arrayOop.hpp"
#include "oops/markOop.hpp"
#include "oops/methodDataOop.hpp"
#include "oops/methodOop.hpp"
#include "prims/jvmtiExport.hpp"
#include "prims/jvmtiRedefineClassesTrace.hpp"
#include "prims/jvmtiThreadState.hpp"
#include "runtime/basicLock.hpp"
#include "runtime/biasedLocking.hpp"
#include "runtime/sharedRuntime.hpp"
#ifdef TARGET_OS_FAMILY_linux
# include "thread_linux.inline.hpp"
#endif
#ifdef TARGET_OS_FAMILY_solaris
# include "thread_solaris.inline.hpp"
#endif
#ifdef TARGET_OS_FAMILY_windows
# include "thread_windows.inline.hpp"
#endif
D
duke 已提交
48 49 50 51 52


// Implementation of InterpreterMacroAssembler
#ifdef CC_INTERP
void InterpreterMacroAssembler::get_method(Register reg) {
53 54
  movptr(reg, Address(rbp, -(sizeof(BytecodeInterpreter) + 2 * wordSize)));
  movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method)));
D
duke 已提交
55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76
}
#endif // CC_INTERP


#ifndef CC_INTERP
void InterpreterMacroAssembler::call_VM_leaf_base(
  address entry_point,
  int     number_of_arguments
) {
  // interpreter specific
  //
  // Note: No need to save/restore bcp & locals (rsi & rdi) pointer
  //       since these are callee saved registers and no blocking/
  //       GC can happen in leaf calls.
  // Further Note: DO NOT save/restore bcp/locals. If a caller has
  // already saved them so that it can use rsi/rdi as temporaries
  // then a save/restore here will DESTROY the copy the caller
  // saved! There used to be a save_bcp() that only happened in
  // the ASSERT path (no restore_bcp). Which caused bizarre failures
  // when jvm built with ASSERTs.
#ifdef ASSERT
  { Label L;
77
    cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
D
duke 已提交
78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102
    jcc(Assembler::equal, L);
    stop("InterpreterMacroAssembler::call_VM_leaf_base: last_sp != NULL");
    bind(L);
  }
#endif
  // super call
  MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
  // interpreter specific

  // Used to ASSERT that rsi/rdi were equal to frame's bcp/locals
  // but since they may not have been saved (and we don't want to
  // save them here (see note above) the assert is invalid.
}


void InterpreterMacroAssembler::call_VM_base(
  Register oop_result,
  Register java_thread,
  Register last_java_sp,
  address  entry_point,
  int      number_of_arguments,
  bool     check_exceptions
) {
#ifdef ASSERT
  { Label L;
103
    cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
D
duke 已提交
104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155
    jcc(Assembler::equal, L);
    stop("InterpreterMacroAssembler::call_VM_base: last_sp != NULL");
    bind(L);
  }
#endif /* ASSERT */
  // interpreter specific
  //
  // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
  //       really make a difference for these runtime calls, since they are
  //       slow anyway. Btw., bcp must be saved/restored since it may change
  //       due to GC.
  assert(java_thread == noreg , "not expecting a precomputed java thread");
  save_bcp();
  // super call
  MacroAssembler::call_VM_base(oop_result, java_thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
  // interpreter specific
  restore_bcp();
  restore_locals();
}


void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
  if (JvmtiExport::can_pop_frame()) {
    Label L;
    // Initiate popframe handling only if it is not already being processed.  If the flag
    // has the popframe_processing bit set, it means that this code is called *during* popframe
    // handling - we don't want to reenter.
    Register pop_cond = java_thread;  // Not clear if any other register is available...
    movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
    testl(pop_cond, JavaThread::popframe_pending_bit);
    jcc(Assembler::zero, L);
    testl(pop_cond, JavaThread::popframe_processing_bit);
    jcc(Assembler::notZero, L);
    // Call Interpreter::remove_activation_preserving_args_entry() to get the
    // address of the same-named entrypoint in the generated interpreter code.
    call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
    jmp(rax);
    bind(L);
    get_thread(java_thread);
  }
}


void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
  get_thread(rcx);
  movl(rcx, Address(rcx, JavaThread::jvmti_thread_state_offset()));
  const Address tos_addr (rcx, JvmtiThreadState::earlyret_tos_offset());
  const Address oop_addr (rcx, JvmtiThreadState::earlyret_oop_offset());
  const Address val_addr (rcx, JvmtiThreadState::earlyret_value_offset());
  const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
                             + in_ByteSize(wordSize));
  switch (state) {
156
    case atos: movptr(rax, oop_addr);
157
               movptr(oop_addr, NULL_WORD);
D
duke 已提交
158
               verify_oop(rax, state);                break;
159 160
    case ltos:
               movl(rdx, val_addr1);               // fall through
D
duke 已提交
161 162 163 164 165 166 167 168 169 170
    case btos:                                     // fall through
    case ctos:                                     // fall through
    case stos:                                     // fall through
    case itos: movl(rax, val_addr);                   break;
    case ftos: fld_s(val_addr);                       break;
    case dtos: fld_d(val_addr);                       break;
    case vtos: /* nothing to do */                    break;
    default  : ShouldNotReachHere();
  }
  // Clean up tos value in the thread object
171
  movl(tos_addr,  (int32_t) ilgl);
172
  movptr(val_addr,  NULL_WORD);
173
  NOT_LP64(movptr(val_addr1, NULL_WORD));
D
duke 已提交
174 175 176 177 178 179 180
}


void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
  if (JvmtiExport::can_force_early_return()) {
    Label L;
    Register tmp = java_thread;
181 182
    movptr(tmp, Address(tmp, JavaThread::jvmti_thread_state_offset()));
    testptr(tmp, tmp);
D
duke 已提交
183 184 185 186 187 188 189 190 191 192 193 194
    jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;

    // Initiate earlyret handling only if it is not already being processed.
    // If the flag has the earlyret_processing bit set, it means that this code
    // is called *during* earlyret handling - we don't want to reenter.
    movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
    cmpl(tmp, JvmtiThreadState::earlyret_pending);
    jcc(Assembler::notEqual, L);

    // Call Interpreter::remove_activation_early_entry() to get the address of the
    // same-named entrypoint in the generated interpreter code.
    get_thread(java_thread);
195
    movptr(tmp, Address(java_thread, JavaThread::jvmti_thread_state_offset()));
D
duke 已提交
196 197 198 199 200 201 202 203 204 205 206 207
    pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
    call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
    jmp(rax);
    bind(L);
    get_thread(java_thread);
  }
}


void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
  assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
  movl(reg, Address(rsi, bcp_offset));
208
  bswapl(reg);
D
duke 已提交
209 210 211 212
  shrl(reg, 16);
}


213
void InterpreterMacroAssembler::get_cache_index_at_bcp(Register reg, int bcp_offset, size_t index_size) {
D
duke 已提交
214
  assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
215
  if (index_size == sizeof(u2)) {
216
    load_unsigned_short(reg, Address(rsi, bcp_offset));
217
  } else if (index_size == sizeof(u4)) {
218
    assert(EnableInvokeDynamic, "giant index used only for JSR 292");
219
    movl(reg, Address(rsi, bcp_offset));
220 221 222
    // Check if the secondary index definition is still ~x, otherwise
    // we have to change the following assembler code to calculate the
    // plain index.
223 224
    assert(constantPoolCacheOopDesc::decode_secondary_index(~123) == 123, "else change next line");
    notl(reg);  // convert to plain index
225
  } else if (index_size == sizeof(u1)) {
226
    assert(EnableInvokeDynamic, "tiny index used only for JSR 292");
227 228 229
    load_unsigned_byte(reg, Address(rsi, bcp_offset));
  } else {
    ShouldNotReachHere();
230 231 232 233 234
  }
}


void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register index,
235
                                                           int bcp_offset, size_t index_size) {
D
duke 已提交
236
  assert(cache != index, "must use different registers");
237
  get_cache_index_at_bcp(index, bcp_offset, index_size);
238
  movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
D
duke 已提交
239
  assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
240
  shlptr(index, 2); // convert from field index to ConstantPoolCacheEntry index
D
duke 已提交
241 242 243
}


244
void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp,
245
                                                               int bcp_offset, size_t index_size) {
D
duke 已提交
246
  assert(cache != tmp, "must use different register");
247
  get_cache_index_at_bcp(tmp, bcp_offset, index_size);
D
duke 已提交
248 249 250 251
  assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
                               // convert from field index to ConstantPoolCacheEntry index
                               // and from word offset to byte offset
  shll(tmp, 2 + LogBytesPerWord);
252
  movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
D
duke 已提交
253
                               // skip past the header
254 255
  addptr(cache, in_bytes(constantPoolCacheOopDesc::base_offset()));
  addptr(cache, tmp);            // construct pointer to cache entry
D
duke 已提交
256 257 258 259 260 261 262 263
}


  // Generate a subtype check: branch to ok_is_subtype if sub_klass is
  // a subtype of super_klass.  EAX holds the super_klass.  Blows ECX.
  // Resets EDI to locals.  Register sub_klass cannot be any of the above.
void InterpreterMacroAssembler::gen_subtype_check( Register Rsub_klass, Label &ok_is_subtype ) {
  assert( Rsub_klass != rax, "rax, holds superklass" );
264 265
  assert( Rsub_klass != rcx, "used as a temp" );
  assert( Rsub_klass != rdi, "used as a temp, restored from locals" );
D
duke 已提交
266 267

  // Profile the not-null value's klass.
268 269 270 271 272 273
  profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi

  // Do the check.
  check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx

  // Profile the failure of the check.
D
duke 已提交
274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294
  profile_typecheck_failed(rcx); // blows rcx
}

void InterpreterMacroAssembler::f2ieee() {
  if (IEEEPrecision) {
    fstp_s(Address(rsp, 0));
    fld_s(Address(rsp, 0));
  }
}


void InterpreterMacroAssembler::d2ieee() {
  if (IEEEPrecision) {
    fstp_d(Address(rsp, 0));
    fld_d(Address(rsp, 0));
  }
}

// Java Expression Stack

void InterpreterMacroAssembler::pop_ptr(Register r) {
295
  pop(r);
D
duke 已提交
296 297 298
}

void InterpreterMacroAssembler::pop_i(Register r) {
299
  pop(r);
D
duke 已提交
300 301 302
}

void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
303 304
  pop(lo);
  pop(hi);
D
duke 已提交
305 306 307 308
}

void InterpreterMacroAssembler::pop_f() {
  fld_s(Address(rsp, 0));
309
  addptr(rsp, 1 * wordSize);
D
duke 已提交
310 311 312 313
}

void InterpreterMacroAssembler::pop_d() {
  fld_d(Address(rsp, 0));
314
  addptr(rsp, 2 * wordSize);
D
duke 已提交
315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334
}


void InterpreterMacroAssembler::pop(TosState state) {
  switch (state) {
    case atos: pop_ptr(rax);                                 break;
    case btos:                                               // fall through
    case ctos:                                               // fall through
    case stos:                                               // fall through
    case itos: pop_i(rax);                                   break;
    case ltos: pop_l(rax, rdx);                              break;
    case ftos: pop_f();                                      break;
    case dtos: pop_d();                                      break;
    case vtos: /* nothing to do */                           break;
    default  : ShouldNotReachHere();
  }
  verify_oop(rax, state);
}

void InterpreterMacroAssembler::push_ptr(Register r) {
335
  push(r);
D
duke 已提交
336 337 338
}

void InterpreterMacroAssembler::push_i(Register r) {
339
  push(r);
D
duke 已提交
340 341 342
}

void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
343 344
  push(hi);
  push(lo);
D
duke 已提交
345 346 347 348
}

void InterpreterMacroAssembler::push_f() {
  // Do not schedule for no AGI! Never write beyond rsp!
349
  subptr(rsp, 1 * wordSize);
D
duke 已提交
350 351 352 353
  fstp_s(Address(rsp, 0));
}

void InterpreterMacroAssembler::push_d(Register r) {
354 355 356
  // Do not schedule for no AGI! Never write beyond rsp!
  subptr(rsp, 2 * wordSize);
  fstp_d(Address(rsp, 0));
D
duke 已提交
357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376
}


void InterpreterMacroAssembler::push(TosState state) {
  verify_oop(rax, state);
  switch (state) {
    case atos: push_ptr(rax); break;
    case btos:                                               // fall through
    case ctos:                                               // fall through
    case stos:                                               // fall through
    case itos: push_i(rax);                                    break;
    case ltos: push_l(rax, rdx);                               break;
    case ftos: push_f();                                       break;
    case dtos: push_d(rax);                                    break;
    case vtos: /* nothing to do */                             break;
    default  : ShouldNotReachHere();
  }
}


377 378
// Helpers for swap and dup
void InterpreterMacroAssembler::load_ptr(int n, Register val) {
379
  movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
D
duke 已提交
380 381
}

382
void InterpreterMacroAssembler::store_ptr(int n, Register val) {
383
  movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
D
duke 已提交
384 385
}

386
void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
D
duke 已提交
387
  // set sender sp
388
  lea(rsi, Address(rsp, wordSize));
D
duke 已提交
389
  // record last_sp
390
  movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rsi);
391 392 393 394 395 396 397
}


// Jump to from_interpreted entry of a call unless single stepping is possible
// in this thread in which case we must call the i2i entry
void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
  prepare_to_jump_from_interpreted();
D
duke 已提交
398 399 400 401 402 403 404 405

  if (JvmtiExport::can_post_interpreter_events()) {
    Label run_compiled_code;
    // JVMTI events, such as single-stepping, are implemented partly by avoiding running
    // compiled code in threads for which the event is enabled.  Check here for
    // interp_only_mode if these events CAN be enabled.
    get_thread(temp);
    // interp_only is an int, on little endian it is sufficient to test the byte only
406
    // Is a cmpl faster?
D
duke 已提交
407
    cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
408
    jccb(Assembler::zero, run_compiled_code);
D
duke 已提交
409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432
    jmp(Address(method, methodOopDesc::interpreter_entry_offset()));
    bind(run_compiled_code);
  }

  jmp(Address(method, methodOopDesc::from_interpreted_offset()));

}


// The following two routines provide a hook so that an implementation
// can schedule the dispatch in two parts.  Intel does not do this.
void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
  // Nothing Intel-specific to be done here.
}

void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
  dispatch_next(state, step);
}

void InterpreterMacroAssembler::dispatch_base(TosState state, address* table,
                                              bool verifyoop) {
  verify_FPU(1, state);
  if (VerifyActivationFrameSize) {
    Label L;
433 434
    mov(rcx, rbp);
    subptr(rcx, rsp);
D
duke 已提交
435
    int min_frame_size = (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * wordSize;
436
    cmpptr(rcx, min_frame_size);
D
duke 已提交
437 438 439 440 441
    jcc(Assembler::greaterEqual, L);
    stop("broken stack frame");
    bind(L);
  }
  if (verifyoop) verify_oop(rax, state);
442
  Address index(noreg, rbx, Address::times_ptr);
D
duke 已提交
443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503
  ExternalAddress tbl((address)table);
  ArrayAddress dispatch(tbl, index);
  jump(dispatch);
}


void InterpreterMacroAssembler::dispatch_only(TosState state) {
  dispatch_base(state, Interpreter::dispatch_table(state));
}


void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
  dispatch_base(state, Interpreter::normal_table(state));
}

void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
  dispatch_base(state, Interpreter::normal_table(state), false);
}


void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
  // load next bytecode (load before advancing rsi to prevent AGI)
  load_unsigned_byte(rbx, Address(rsi, step));
  // advance rsi
  increment(rsi, step);
  dispatch_base(state, Interpreter::dispatch_table(state));
}


void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
  // load current bytecode
  load_unsigned_byte(rbx, Address(rsi, 0));
  dispatch_base(state, table);
}

// remove activation
//
// Unlock the receiver if this is a synchronized method.
// Unlock any Java monitors from syncronized blocks.
// Remove the activation from the stack.
//
// If there are locked Java monitors
//    If throw_monitor_exception
//       throws IllegalMonitorStateException
//    Else if install_monitor_exception
//       installs IllegalMonitorStateException
//    Else
//       no error processing
void InterpreterMacroAssembler::remove_activation(TosState state, Register ret_addr,
                                                  bool throw_monitor_exception,
                                                  bool install_monitor_exception,
                                                  bool notify_jvmdi) {
  // Note: Registers rax, rdx and FPU ST(0) may be in use for the result
  // check if synchronized method
  Label unlocked, unlock, no_unlock;

  get_thread(rcx);
  const Address do_not_unlock_if_synchronized(rcx,
    in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));

  movbool(rbx, do_not_unlock_if_synchronized);
504
  mov(rdi,rbx);
D
duke 已提交
505 506
  movbool(do_not_unlock_if_synchronized, false); // reset the flag

507
  movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); // get method access flags
D
duke 已提交
508 509 510 511 512 513 514
  movl(rcx, Address(rbx, methodOopDesc::access_flags_offset()));

  testl(rcx, JVM_ACC_SYNCHRONIZED);
  jcc(Assembler::zero, unlocked);

  // Don't unlock anything if the _do_not_unlock_if_synchronized flag
  // is set.
515
  mov(rcx,rdi);
D
duke 已提交
516 517 518 519 520 521 522 523 524
  testbool(rcx);
  jcc(Assembler::notZero, no_unlock);

  // unlock monitor
  push(state);                                   // save result

  // BasicObjectLock will be first in list, since this is a synchronized method. However, need
  // to check that the object has not been unlocked by an explicit monitorexit bytecode.
  const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
525
  lea   (rdx, monitor);                          // address of first monitor
D
duke 已提交
526

527 528 529
  movptr (rax, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
  testptr(rax, rax);
  jcc    (Assembler::notZero, unlock);
D
duke 已提交
530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565

  pop(state);
  if (throw_monitor_exception) {
    empty_FPU_stack();  // remove possible return value from FPU-stack, otherwise stack could overflow

    // Entry already unlocked, need to throw exception
    call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
    should_not_reach_here();
  } else {
    // Monitor already unlocked during a stack unroll.
    // If requested, install an illegal_monitor_state_exception.
    // Continue with stack unrolling.
    if (install_monitor_exception) {
      empty_FPU_stack();  // remove possible return value from FPU-stack, otherwise stack could overflow
      call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
    }
    jmp(unlocked);
  }

  bind(unlock);
  unlock_object(rdx);
  pop(state);

  // Check that for block-structured locking (i.e., that all locked objects has been unlocked)
  bind(unlocked);

  // rax, rdx: Might contain return value

  // Check that all monitors are unlocked
  {
    Label loop, exception, entry, restart;
    const int entry_size               = frame::interpreter_frame_monitor_size()           * wordSize;
    const Address monitor_block_top(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
    const Address monitor_block_bot(rbp, frame::interpreter_frame_initial_sp_offset        * wordSize);

    bind(restart);
566 567
    movptr(rcx, monitor_block_top);           // points to current entry, starting with top-most entry
    lea(rbx, monitor_block_bot);              // points to word before bottom of monitor block
D
duke 已提交
568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583
    jmp(entry);

    // Entry already locked, need to throw exception
    bind(exception);

    if (throw_monitor_exception) {
      empty_FPU_stack();  // remove possible return value from FPU-stack, otherwise stack could overflow

      // Throw exception
      call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
      should_not_reach_here();
    } else {
      // Stack unrolling. Unlock object and install illegal_monitor_exception
      // Unlock does not block, so don't have to worry about the frame

      push(state);
584
      mov(rdx, rcx);
D
duke 已提交
585 586 587 588 589 590 591 592 593 594 595 596
      unlock_object(rdx);
      pop(state);

      if (install_monitor_exception) {
        empty_FPU_stack();  // remove possible return value from FPU-stack, otherwise stack could overflow
        call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
      }

      jmp(restart);
    }

    bind(loop);
597
    cmpptr(Address(rcx, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD);  // check if current entry is used
D
duke 已提交
598 599
    jcc(Assembler::notEqual, exception);

600
    addptr(rcx, entry_size);                     // otherwise advance to next entry
D
duke 已提交
601
    bind(entry);
602
    cmpptr(rcx, rbx);                            // check if bottom reached
D
duke 已提交
603 604 605 606 607 608 609 610 611 612 613 614 615
    jcc(Assembler::notEqual, loop);              // if not at bottom then check this entry
  }

  bind(no_unlock);

  // jvmti support
  if (notify_jvmdi) {
    notify_method_exit(state, NotifyJVMTI);     // preserve TOSCA
  } else {
    notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
  }

  // remove activation
616
  movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
D
duke 已提交
617
  leave();                                     // remove frame anchor
618 619
  pop(ret_addr);                               // get return address
  mov(rsp, rbx);                               // set sp to sender sp
D
duke 已提交
620 621 622
  if (UseSSE) {
    // float and double are returned in xmm register in SSE-mode
    if (state == ftos && UseSSE >= 1) {
623
      subptr(rsp, wordSize);
D
duke 已提交
624 625
      fstp_s(Address(rsp, 0));
      movflt(xmm0, Address(rsp, 0));
626
      addptr(rsp, wordSize);
D
duke 已提交
627
    } else if (state == dtos && UseSSE >= 2) {
628
      subptr(rsp, 2*wordSize);
D
duke 已提交
629 630
      fstp_d(Address(rsp, 0));
      movdbl(xmm0, Address(rsp, 0));
631
      addptr(rsp, 2*wordSize);
D
duke 已提交
632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661
    }
  }
}

#endif /* !CC_INTERP */


// Lock object
//
// Argument: rdx : Points to BasicObjectLock to be used for locking. Must
// be initialized with object to lock
void InterpreterMacroAssembler::lock_object(Register lock_reg) {
  assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");

  if (UseHeavyMonitors) {
    call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
  } else {

    Label done;

    const Register swap_reg = rax;  // Must use rax, for cmpxchg instruction
    const Register obj_reg  = rcx;  // Will contain the oop

    const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
    const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
    const int mark_offset = lock_offset + BasicLock::displaced_header_offset_in_bytes();

    Label slow_case;

    // Load object pointer into obj_reg %rcx
662
    movptr(obj_reg, Address(lock_reg, obj_offset));
D
duke 已提交
663 664 665 666 667 668 669 670

    if (UseBiasedLocking) {
      // Note: we use noreg for the temporary register since it's hard
      // to come up with a free register on all incoming code paths
      biased_locking_enter(lock_reg, obj_reg, swap_reg, noreg, false, done, &slow_case);
    }

    // Load immediate 1 into swap_reg %rax,
671
    movptr(swap_reg, (int32_t)1);
D
duke 已提交
672 673

    // Load (object->mark() | 1) into swap_reg %rax,
674
    orptr(swap_reg, Address(obj_reg, 0));
D
duke 已提交
675 676

    // Save (object->mark() | 1) into BasicLock's displaced header
677
    movptr(Address(lock_reg, mark_offset), swap_reg);
D
duke 已提交
678 679 680 681 682

    assert(lock_offset == 0, "displached header must be first word in BasicObjectLock");
    if (os::is_MP()) {
      lock();
    }
683
    cmpxchgptr(lock_reg, Address(obj_reg, 0));
D
duke 已提交
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698
    if (PrintBiasedLockingStatistics) {
      cond_inc32(Assembler::zero,
                 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
    }
    jcc(Assembler::zero, done);

    // Test if the oopMark is an obvious stack pointer, i.e.,
    //  1) (mark & 3) == 0, and
    //  2) rsp <= mark < mark + os::pagesize()
    //
    // These 3 tests can be done by evaluating the following
    // expression: ((mark - rsp) & (3 - os::vm_page_size())),
    // assuming both stack pointer and pagesize have their
    // least significant 2 bits clear.
    // NOTE: the oopMark is in swap_reg %rax, as the result of cmpxchg
699 700
    subptr(swap_reg, rsp);
    andptr(swap_reg, 3 - os::vm_page_size());
D
duke 已提交
701 702

    // Save the test result, for recursive case, the result is zero
703
    movptr(Address(lock_reg, mark_offset), swap_reg);
D
duke 已提交
704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742

    if (PrintBiasedLockingStatistics) {
      cond_inc32(Assembler::zero,
                 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
    }
    jcc(Assembler::zero, done);

    bind(slow_case);

    // Call the runtime routine for slow case
    call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);

    bind(done);
  }
}


// Unlocks an object. Used in monitorexit bytecode and remove_activation.
//
// Argument: rdx : Points to BasicObjectLock structure for lock
// Throw an IllegalMonitorException if object is not locked by current thread
//
// Uses: rax, rbx, rcx, rdx
void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
  assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");

  if (UseHeavyMonitors) {
    call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
  } else {
    Label done;

    const Register swap_reg   = rax;  // Must use rax, for cmpxchg instruction
    const Register header_reg = rbx;  // Will contain the old oopMark
    const Register obj_reg    = rcx;  // Will contain the oop

    save_bcp(); // Save in case of exception

    // Convert from BasicObjectLock structure to object and BasicLock structure
    // Store the BasicLock address into %rax,
743
    lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
D
duke 已提交
744 745

    // Load oop into obj_reg(%rcx)
746
    movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes ()));
D
duke 已提交
747 748

    // Free entry
749
    movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
D
duke 已提交
750 751 752 753 754 755

    if (UseBiasedLocking) {
      biased_locking_exit(obj_reg, header_reg, done);
    }

    // Load the old header from BasicLock structure
756
    movptr(header_reg, Address(swap_reg, BasicLock::displaced_header_offset_in_bytes()));
D
duke 已提交
757 758

    // Test for recursion
759
    testptr(header_reg, header_reg);
D
duke 已提交
760 761 762 763 764 765

    // zero for recursive case
    jcc(Assembler::zero, done);

    // Atomic swap back the old header
    if (os::is_MP()) lock();
766
    cmpxchgptr(header_reg, Address(obj_reg, 0));
D
duke 已提交
767 768 769 770 771

    // zero for recursive case
    jcc(Assembler::zero, done);

    // Call the runtime routine for slow case.
772
    movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), obj_reg); // restore obj
D
duke 已提交
773 774 775 776 777 778 779 780 781 782 783 784 785 786
    call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);

    bind(done);

    restore_bcp();
  }
}


#ifndef CC_INTERP

// Test ImethodDataPtr.  If it is null, continue at the specified label
void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, Label& zero_continue) {
  assert(ProfileInterpreter, "must be profiling interpreter");
787 788
  movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize));
  testptr(mdp, mdp);
D
duke 已提交
789 790 791 792 793 794 795
  jcc(Assembler::zero, zero_continue);
}


// Set the method data pointer for the current bcp.
void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
  assert(ProfileInterpreter, "must be profiling interpreter");
796
  Label set_mdp;
797 798
  push(rax);
  push(rbx);
D
duke 已提交
799 800 801

  get_method(rbx);
  // Test MDO to avoid the call if it is NULL.
802 803
  movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
  testptr(rax, rax);
804
  jcc(Assembler::zero, set_mdp);
D
duke 已提交
805 806 807 808
  // rbx,: method
  // rsi: bcp
  call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, rsi);
  // rax,: mdi
809
  // mdo is guaranteed to be non-zero here, we checked for it before the call.
810 811
  movptr(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
  addptr(rbx, in_bytes(methodDataOopDesc::data_offset()));
812 813 814
  addptr(rax, rbx);
  bind(set_mdp);
  movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
815 816
  pop(rbx);
  pop(rax);
D
duke 已提交
817 818 819 820 821 822
}

void InterpreterMacroAssembler::verify_method_data_pointer() {
  assert(ProfileInterpreter, "must be profiling interpreter");
#ifdef ASSERT
  Label verify_continue;
823 824 825 826
  push(rax);
  push(rbx);
  push(rcx);
  push(rdx);
D
duke 已提交
827 828 829 830 831
  test_method_data_pointer(rcx, verify_continue); // If mdp is zero, continue
  get_method(rbx);

  // If the mdp is valid, it will point to a DataLayout header which is
  // consistent with the bcp.  The converse is highly probable also.
832
  load_unsigned_short(rdx, Address(rcx, in_bytes(DataLayout::bci_offset())));
833 834 835
  addptr(rdx, Address(rbx, methodOopDesc::const_offset()));
  lea(rdx, Address(rdx, constMethodOopDesc::codes_offset()));
  cmpptr(rdx, rsi);
D
duke 已提交
836 837 838 839 840 841
  jcc(Assembler::equal, verify_continue);
  // rbx,: method
  // rsi: bcp
  // rcx: mdp
  call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), rbx, rsi, rcx);
  bind(verify_continue);
842 843 844 845
  pop(rdx);
  pop(rcx);
  pop(rbx);
  pop(rax);
D
duke 已提交
846 847 848 849 850
#endif // ASSERT
}


void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, int constant, Register value) {
851 852
  // %%% this seems to be used to store counter data which is surely 32bits
  // however 64bit side stores 64 bits which seems wrong
D
duke 已提交
853 854
  assert(ProfileInterpreter, "must be profiling interpreter");
  Address data(mdp_in, constant);
855
  movptr(data, value);
D
duke 已提交
856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874
}


void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
                                                      int constant,
                                                      bool decrement) {
  // Counter address
  Address data(mdp_in, constant);

  increment_mdp_data_at(data, decrement);
}


void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
                                                      bool decrement) {

  assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
  assert(ProfileInterpreter, "must be profiling interpreter");

875
  // %%% 64bit treats this as 64 bit which seems unlikely
D
duke 已提交
876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921
  if (decrement) {
    // Decrement the register.  Set condition codes.
    addl(data, -DataLayout::counter_increment);
    // If the decrement causes the counter to overflow, stay negative
    Label L;
    jcc(Assembler::negative, L);
    addl(data, DataLayout::counter_increment);
    bind(L);
  } else {
    assert(DataLayout::counter_increment == 1,
           "flow-free idiom only works with 1");
    // Increment the register.  Set carry flag.
    addl(data, DataLayout::counter_increment);
    // If the increment causes the counter to overflow, pull back by 1.
    sbbl(data, 0);
  }
}


void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
                                                      Register reg,
                                                      int constant,
                                                      bool decrement) {
  Address data(mdp_in, reg, Address::times_1, constant);

  increment_mdp_data_at(data, decrement);
}


void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, int flag_byte_constant) {
  assert(ProfileInterpreter, "must be profiling interpreter");
  int header_offset = in_bytes(DataLayout::header_offset());
  int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
  // Set the flag
  orl(Address(mdp_in, header_offset), header_bits);
}



void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
                                                 int offset,
                                                 Register value,
                                                 Register test_value_out,
                                                 Label& not_equal_continue) {
  assert(ProfileInterpreter, "must be profiling interpreter");
  if (test_value_out == noreg) {
922
    cmpptr(value, Address(mdp_in, offset));
D
duke 已提交
923 924
  } else {
    // Put the test value into a register, so caller can use it:
925 926
    movptr(test_value_out, Address(mdp_in, offset));
    cmpptr(test_value_out, value);
D
duke 已提交
927 928 929 930 931 932 933 934
  }
  jcc(Assembler::notEqual, not_equal_continue);
}


void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, int offset_of_disp) {
  assert(ProfileInterpreter, "must be profiling interpreter");
  Address disp_address(mdp_in, offset_of_disp);
935 936
  addptr(mdp_in,disp_address);
  movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
D
duke 已提交
937 938 939 940 941 942
}


void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp) {
  assert(ProfileInterpreter, "must be profiling interpreter");
  Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
943 944
  addptr(mdp_in, disp_address);
  movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
D
duke 已提交
945 946 947 948 949
}


void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, int constant) {
  assert(ProfileInterpreter, "must be profiling interpreter");
950 951
  addptr(mdp_in, constant);
  movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
D
duke 已提交
952 953 954 955 956
}


void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
  assert(ProfileInterpreter, "must be profiling interpreter");
957
  push(return_bci);             // save/restore across call_VM
D
duke 已提交
958
  call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci);
959
  pop(return_bci);
D
duke 已提交
960 961 962 963 964 965 966 967 968 969 970 971 972 973 974
}


void InterpreterMacroAssembler::profile_taken_branch(Register mdp, Register bumped_count) {
  if (ProfileInterpreter) {
    Label profile_continue;

    // If no method data exists, go to profile_continue.
    // Otherwise, assign to mdp
    test_method_data_pointer(mdp, profile_continue);

    // We are taking a branch.  Increment the taken count.
    // We inline increment_mdp_data_at to return bumped_count in a register
    //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
    Address data(mdp, in_bytes(JumpData::taken_offset()));
975 976

    // %%% 64bit treats these cells as 64 bit but they seem to be 32 bit
D
duke 已提交
977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040
    movl(bumped_count,data);
    assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
    addl(bumped_count, DataLayout::counter_increment);
    sbbl(bumped_count, 0);
    movl(data,bumped_count);    // Store back out

    // The method data pointer needs to be updated to reflect the new target.
    update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
    bind (profile_continue);
  }
}


void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
  if (ProfileInterpreter) {
    Label profile_continue;

    // If no method data exists, go to profile_continue.
    test_method_data_pointer(mdp, profile_continue);

    // We are taking a branch.  Increment the not taken count.
    increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));

    // The method data pointer needs to be updated to correspond to the next bytecode
    update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
    bind (profile_continue);
  }
}


void InterpreterMacroAssembler::profile_call(Register mdp) {
  if (ProfileInterpreter) {
    Label profile_continue;

    // If no method data exists, go to profile_continue.
    test_method_data_pointer(mdp, profile_continue);

    // We are making a call.  Increment the count.
    increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));

    // The method data pointer needs to be updated to reflect the new target.
    update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
    bind (profile_continue);
  }
}


void InterpreterMacroAssembler::profile_final_call(Register mdp) {
  if (ProfileInterpreter) {
    Label profile_continue;

    // If no method data exists, go to profile_continue.
    test_method_data_pointer(mdp, profile_continue);

    // We are making a call.  Increment the count.
    increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));

    // The method data pointer needs to be updated to reflect the new target.
    update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
    bind (profile_continue);
  }
}


1041 1042 1043
void InterpreterMacroAssembler::profile_virtual_call(Register receiver, Register mdp,
                                                     Register reg2,
                                                     bool receiver_can_be_null) {
D
duke 已提交
1044 1045 1046 1047 1048 1049
  if (ProfileInterpreter) {
    Label profile_continue;

    // If no method data exists, go to profile_continue.
    test_method_data_pointer(mdp, profile_continue);

1050 1051
    Label skip_receiver_profile;
    if (receiver_can_be_null) {
1052
      Label not_null;
1053
      testptr(receiver, receiver);
1054 1055 1056 1057 1058
      jccb(Assembler::notZero, not_null);
      // We are making a call.  Increment the count for null receiver.
      increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
      jmp(skip_receiver_profile);
      bind(not_null);
1059 1060
    }

D
duke 已提交
1061
    // Record the receiver type.
1062
    record_klass_in_profile(receiver, mdp, reg2, true);
1063
    bind(skip_receiver_profile);
D
duke 已提交
1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075

    // The method data pointer needs to be updated to reflect the new target.
    update_mdp_by_constant(mdp,
                           in_bytes(VirtualCallData::
                                    virtual_call_data_size()));
    bind(profile_continue);
  }
}


void InterpreterMacroAssembler::record_klass_in_profile_helper(
                                        Register receiver, Register mdp,
1076 1077 1078 1079 1080 1081
                                        Register reg2, int start_row,
                                        Label& done, bool is_virtual_call) {
  if (TypeProfileWidth == 0) {
    if (is_virtual_call) {
      increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
    }
1082
    return;
1083
  }
1084

D
duke 已提交
1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110
  int last_row = VirtualCallData::row_limit() - 1;
  assert(start_row <= last_row, "must be work left to do");
  // Test this row for both the receiver and for null.
  // Take any of three different outcomes:
  //   1. found receiver => increment count and goto done
  //   2. found null => keep looking for case 1, maybe allocate this cell
  //   3. found something else => keep looking for cases 1 and 2
  // Case 3 is handled by a recursive call.
  for (int row = start_row; row <= last_row; row++) {
    Label next_test;
    bool test_for_null_also = (row == start_row);

    // See if the receiver is receiver[n].
    int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
    test_mdp_data_at(mdp, recvr_offset, receiver,
                     (test_for_null_also ? reg2 : noreg),
                     next_test);
    // (Reg2 now contains the receiver from the CallData.)

    // The receiver is receiver[n].  Increment count[n].
    int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
    increment_mdp_data_at(mdp, count_offset);
    jmp(done);
    bind(next_test);

    if (row == start_row) {
1111
      Label found_null;
D
duke 已提交
1112
      // Failed the equality check on receiver[n]...  Test for null.
1113
      testptr(reg2, reg2);
D
duke 已提交
1114 1115
      if (start_row == last_row) {
        // The only thing left to do is handle the null case.
1116 1117 1118
        if (is_virtual_call) {
          jccb(Assembler::zero, found_null);
          // Receiver did not match any saved receiver and there is no empty row for it.
1119
          // Increment total counter to indicate polymorphic case.
1120 1121 1122 1123 1124 1125
          increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
          jmp(done);
          bind(found_null);
        } else {
          jcc(Assembler::notZero, done);
        }
D
duke 已提交
1126 1127 1128 1129 1130 1131
        break;
      }
      // Since null is rare, make it be the branch-taken case.
      jcc(Assembler::zero, found_null);

      // Put all the "Case 3" tests here.
1132
      record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call);
D
duke 已提交
1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146

      // Found a null.  Keep searching for a matching receiver,
      // but remember that this is an empty (unused) slot.
      bind(found_null);
    }
  }

  // In the fall-through case, we found no matching receiver, but we
  // observed the receiver[start_row] is NULL.

  // Fill in the receiver field and increment the count.
  int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
  set_mdp_data_at(mdp, recvr_offset, receiver);
  int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
1147
  movptr(reg2, (int32_t)DataLayout::counter_increment);
D
duke 已提交
1148
  set_mdp_data_at(mdp, count_offset, reg2);
1149 1150 1151
  if (start_row > 0) {
    jmp(done);
  }
D
duke 已提交
1152 1153 1154
}

void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1155 1156
                                                        Register mdp, Register reg2,
                                                        bool is_virtual_call) {
D
duke 已提交
1157 1158 1159
  assert(ProfileInterpreter, "must be profiling");
  Label done;

1160
  record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
D
duke 已提交
1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205

  bind (done);
}

void InterpreterMacroAssembler::profile_ret(Register return_bci, Register mdp) {
  if (ProfileInterpreter) {
    Label profile_continue;
    uint row;

    // If no method data exists, go to profile_continue.
    test_method_data_pointer(mdp, profile_continue);

    // Update the total ret count.
    increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));

    for (row = 0; row < RetData::row_limit(); row++) {
      Label next_test;

      // See if return_bci is equal to bci[n]:
      test_mdp_data_at(mdp, in_bytes(RetData::bci_offset(row)), return_bci,
                       noreg, next_test);

      // return_bci is equal to bci[n].  Increment the count.
      increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));

      // The method data pointer needs to be updated to reflect the new target.
      update_mdp_by_offset(mdp, in_bytes(RetData::bci_displacement_offset(row)));
      jmp(profile_continue);
      bind(next_test);
    }

    update_mdp_for_ret(return_bci);

    bind (profile_continue);
  }
}


void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
  if (ProfileInterpreter) {
    Label profile_continue;

    // If no method data exists, go to profile_continue.
    test_method_data_pointer(mdp, profile_continue);

1206 1207
    set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());

D
duke 已提交
1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252
    // The method data pointer needs to be updated.
    int mdp_delta = in_bytes(BitData::bit_data_size());
    if (TypeProfileCasts) {
      mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
    }
    update_mdp_by_constant(mdp, mdp_delta);

    bind (profile_continue);
  }
}


void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
  if (ProfileInterpreter && TypeProfileCasts) {
    Label profile_continue;

    // If no method data exists, go to profile_continue.
    test_method_data_pointer(mdp, profile_continue);

    int count_offset = in_bytes(CounterData::count_offset());
    // Back up the address, since we have already bumped the mdp.
    count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());

    // *Decrement* the counter.  We expect to see zero or small negatives.
    increment_mdp_data_at(mdp, count_offset, true);

    bind (profile_continue);
  }
}


void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2)
{
  if (ProfileInterpreter) {
    Label profile_continue;

    // If no method data exists, go to profile_continue.
    test_method_data_pointer(mdp, profile_continue);

    // The method data pointer needs to be updated.
    int mdp_delta = in_bytes(BitData::bit_data_size());
    if (TypeProfileCasts) {
      mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());

      // Record the object type.
1253
      record_klass_in_profile(klass, mdp, reg2, false);
D
duke 已提交
1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289
      assert(reg2 == rdi, "we know how to fix this blown reg");
      restore_locals();         // Restore EDI
    }
    update_mdp_by_constant(mdp, mdp_delta);

    bind(profile_continue);
  }
}


void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
  if (ProfileInterpreter) {
    Label profile_continue;

    // If no method data exists, go to profile_continue.
    test_method_data_pointer(mdp, profile_continue);

    // Update the default case count
    increment_mdp_data_at(mdp, in_bytes(MultiBranchData::default_count_offset()));

    // The method data pointer needs to be updated.
    update_mdp_by_offset(mdp, in_bytes(MultiBranchData::default_displacement_offset()));

    bind (profile_continue);
  }
}


void InterpreterMacroAssembler::profile_switch_case(Register index, Register mdp, Register reg2) {
  if (ProfileInterpreter) {
    Label profile_continue;

    // If no method data exists, go to profile_continue.
    test_method_data_pointer(mdp, profile_continue);

    // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes()
1290 1291 1292 1293 1294
    movptr(reg2, (int32_t)in_bytes(MultiBranchData::per_case_size()));
    // index is positive and so should have correct value if this code were
    // used on 64bits
    imulptr(index, reg2);
    addptr(index, in_bytes(MultiBranchData::case_array_offset()));
D
duke 已提交
1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343

    // Update the case count
    increment_mdp_data_at(mdp, index, in_bytes(MultiBranchData::relative_count_offset()));

    // The method data pointer needs to be updated.
    update_mdp_by_offset(mdp, index, in_bytes(MultiBranchData::relative_displacement_offset()));

    bind (profile_continue);
  }
}

#endif // !CC_INTERP



void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
  if (state == atos) MacroAssembler::verify_oop(reg);
}


#ifndef CC_INTERP
void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
  if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth);
}

#endif /* CC_INTERP */


void InterpreterMacroAssembler::notify_method_entry() {
  // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
  // track stack depth.  If it is possible to enter interp_only_mode we add
  // the code to check if the event should be sent.
  if (JvmtiExport::can_post_interpreter_events()) {
    Label L;
    get_thread(rcx);
    movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
    testl(rcx,rcx);
    jcc(Assembler::zero, L);
    call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry));
    bind(L);
  }

  {
    SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
    get_thread(rcx);
    get_method(rbx);
    call_VM_leaf(
      CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), rcx, rbx);
  }
1344 1345 1346 1347 1348 1349 1350 1351 1352

  // RedefineClasses() tracing support for obsolete method entry
  if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
    get_thread(rcx);
    get_method(rbx);
    call_VM_leaf(
      CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
      rcx, rbx);
  }
D
duke 已提交
1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381
}


void InterpreterMacroAssembler::notify_method_exit(
    TosState state, NotifyMethodExitMode mode) {
  // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
  // track stack depth.  If it is possible to enter interp_only_mode we add
  // the code to check if the event should be sent.
  if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
    Label L;
    // Note: frame::interpreter_frame_result has a dependency on how the
    // method result is saved across the call to post_method_exit. If this
    // is changed then the interpreter_frame_result implementation will
    // need to be updated too.

    // For c++ interpreter the result is always stored at a known location in the frame
    // template interpreter will leave it on the top of the stack.
    NOT_CC_INTERP(push(state);)
    get_thread(rcx);
    movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
    testl(rcx,rcx);
    jcc(Assembler::zero, L);
    call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
    bind(L);
    NOT_CC_INTERP(pop(state);)
  }

  {
    SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1382
    NOT_CC_INTERP(push(state));
D
duke 已提交
1383 1384 1385 1386 1387
    get_thread(rbx);
    get_method(rcx);
    call_VM_leaf(
      CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
      rbx, rcx);
1388
    NOT_CC_INTERP(pop(state));
D
duke 已提交
1389 1390
  }
}
I
iveresov 已提交
1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404

// Jump if ((*counter_addr += increment) & mask) satisfies the condition.
void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
                                                        int increment, int mask,
                                                        Register scratch, bool preloaded,
                                                        Condition cond, Label* where) {
  if (!preloaded) {
    movl(scratch, counter_addr);
  }
  incrementl(scratch, increment);
  movl(counter_addr, scratch);
  andl(scratch, mask);
  jcc(cond, *where);
}