1 /*
   2  * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "asm/macroAssembler.hpp"
  27 #include "interpreter/bytecodeHistogram.hpp"
  28 #include "interpreter/interpreter.hpp"
  29 #include "interpreter/interpreterGenerator.hpp"
  30 #include "interpreter/interpreterRuntime.hpp"
  31 #include "interpreter/interp_masm.hpp"
  32 #include "interpreter/templateTable.hpp"
  33 #include "oops/arrayOop.hpp"
  34 #include "oops/methodData.hpp"
  35 #include "oops/method.hpp"
  36 #include "oops/oop.inline.hpp"
  37 #include "prims/jvmtiExport.hpp"
  38 #include "prims/jvmtiThreadState.hpp"
  39 #include "runtime/arguments.hpp"
  40 #include "runtime/deoptimization.hpp"
  41 #include "runtime/frame.inline.hpp"
  42 #include "runtime/sharedRuntime.hpp"
  43 #include "runtime/stubRoutines.hpp"
  44 #include "runtime/synchronizer.hpp"
  45 #include "runtime/timer.hpp"
  46 #include "runtime/vframeArray.hpp"
  47 #include "utilities/debug.hpp"
  48 #include "utilities/macros.hpp"
  49 
  50 #define __ _masm->
  51 
  52 #ifndef CC_INTERP
  53 
  54 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
  55 const int bcp_offset    = frame::interpreter_frame_bcp_offset    * wordSize;
  56 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
  57 
  58 //-----------------------------------------------------------------------------
  59 
  60 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
  61   address entry = __ pc();
  62 
  63 #ifdef ASSERT
  64   {
  65     Label L;
  66     __ lea(rax, Address(rbp,
  67                         frame::interpreter_frame_monitor_block_top_offset *
  68                         wordSize));
  69     __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
  70                          // grows negative)
  71     __ jcc(Assembler::aboveEqual, L); // check if frame is complete
  72     __ stop ("interpreter frame not set up");
  73     __ bind(L);
  74   }
  75 #endif // ASSERT
  76   // Restore bcp under the assumption that the current frame is still
  77   // interpreted
  78   __ restore_bcp();
  79 
  80   // expression stack must be empty before entering the VM if an
  81   // exception happened
  82   __ empty_expression_stack();
  83   // throw exception
  84   __ call_VM(noreg,
  85              CAST_FROM_FN_PTR(address,
  86                               InterpreterRuntime::throw_StackOverflowError));
  87   return entry;
  88 }
  89 
  90 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(
  91         const char* name) {
  92   address entry = __ pc();
  93   // expression stack must be empty before entering the VM if an
  94   // exception happened
  95   __ empty_expression_stack();
  96   // setup parameters
  97   // ??? convention: expect aberrant index in register ebx
  98   __ lea(c_rarg1, ExternalAddress((address)name));
  99   __ call_VM(noreg,
 100              CAST_FROM_FN_PTR(address,
 101                               InterpreterRuntime::
 102                               throw_ArrayIndexOutOfBoundsException),
 103              c_rarg1, rbx);
 104   return entry;
 105 }
 106 
 107 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
 108   address entry = __ pc();
 109 
 110   // object is at TOS
 111   __ pop(c_rarg1);
 112 
 113   // expression stack must be empty before entering the VM if an
 114   // exception happened
 115   __ empty_expression_stack();
 116 
 117   __ call_VM(noreg,
 118              CAST_FROM_FN_PTR(address,
 119                               InterpreterRuntime::
 120                               throw_ClassCastException),
 121              c_rarg1);
 122   return entry;
 123 }
 124 
 125 address TemplateInterpreterGenerator::generate_exception_handler_common(
 126         const char* name, const char* message, bool pass_oop) {
 127   assert(!pass_oop || message == NULL, "either oop or message but not both");
 128   address entry = __ pc();
 129   if (pass_oop) {
 130     // object is at TOS
 131     __ pop(c_rarg2);
 132   }
 133   // expression stack must be empty before entering the VM if an
 134   // exception happened
 135   __ empty_expression_stack();
 136   // setup parameters
 137   __ lea(c_rarg1, ExternalAddress((address)name));
 138   if (pass_oop) {
 139     __ call_VM(rax, CAST_FROM_FN_PTR(address,
 140                                      InterpreterRuntime::
 141                                      create_klass_exception),
 142                c_rarg1, c_rarg2);
 143   } else {
 144     // kind of lame ExternalAddress can't take NULL because
 145     // external_word_Relocation will assert.
 146     if (message != NULL) {
 147       __ lea(c_rarg2, ExternalAddress((address)message));
 148     } else {
 149       __ movptr(c_rarg2, NULL_WORD);
 150     }
 151     __ call_VM(rax,
 152                CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
 153                c_rarg1, c_rarg2);
 154   }
 155   // throw exception
 156   __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
 157   return entry;
 158 }
 159 
 160 
 161 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
 162   address entry = __ pc();
 163   // NULL last_sp until next java call
 164   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
 165   __ dispatch_next(state);
 166   return entry;
 167 }
 168 
 169 
 170 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
 171   address entry = __ pc();
 172 
 173   // Restore stack bottom in case i2c adjusted stack
 174   __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
 175   // and NULL it as marker that esp is now tos until next java call
 176   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
 177 
 178   __ restore_bcp();
 179   __ restore_locals();
 180 
 181   if (state == atos) {
 182     Register mdp = rbx;
 183     Register tmp = rcx;
 184     __ profile_return_type(mdp, rax, tmp);
 185   }
 186 
 187   const Register cache = rbx;
 188   const Register index = rcx;
 189   __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
 190 
 191   const Register flags = cache;
 192   __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
 193   __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask);
 194   __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale()));
 195   __ dispatch_next(state, step);
 196 
 197   return entry;
 198 }
 199 
 200 
 201 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state,
 202                                                                int step) {
 203   address entry = __ pc();
 204   // NULL last_sp until next java call
 205   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
 206   __ restore_bcp();
 207   __ restore_locals();















 208   // handle exceptions
 209   {
 210     Label L;
 211     __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
 212     __ jcc(Assembler::zero, L);
 213     __ call_VM(noreg,
 214                CAST_FROM_FN_PTR(address,
 215                                 InterpreterRuntime::throw_pending_exception));
 216     __ should_not_reach_here();
 217     __ bind(L);
 218   }
 219   __ dispatch_next(state, step);
 220   return entry;
 221 }
 222 
 223 int AbstractInterpreter::BasicType_as_index(BasicType type) {
 224   int i = 0;
 225   switch (type) {
 226     case T_BOOLEAN: i = 0; break;
 227     case T_CHAR   : i = 1; break;
 228     case T_BYTE   : i = 2; break;
 229     case T_SHORT  : i = 3; break;
 230     case T_INT    : i = 4; break;
 231     case T_LONG   : i = 5; break;
 232     case T_VOID   : i = 6; break;
 233     case T_FLOAT  : i = 7; break;
 234     case T_DOUBLE : i = 8; break;
 235     case T_OBJECT : i = 9; break;
 236     case T_ARRAY  : i = 9; break;
 237     default       : ShouldNotReachHere();
 238   }
 239   assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers,
 240          "index out of bounds");
 241   return i;
 242 }
 243 
 244 
 245 address TemplateInterpreterGenerator::generate_result_handler_for(
 246         BasicType type) {
 247   address entry = __ pc();
 248   switch (type) {
 249   case T_BOOLEAN: __ c2bool(rax);            break;
 250   case T_CHAR   : __ movzwl(rax, rax);       break;
 251   case T_BYTE   : __ sign_extend_byte(rax);  break;
 252   case T_SHORT  : __ sign_extend_short(rax); break;
 253   case T_INT    : /* nothing to do */        break;
 254   case T_LONG   : /* nothing to do */        break;
 255   case T_VOID   : /* nothing to do */        break;
 256   case T_FLOAT  : /* nothing to do */        break;
 257   case T_DOUBLE : /* nothing to do */        break;
 258   case T_OBJECT :
 259     // retrieve result from frame
 260     __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
 261     // and verify it
 262     __ verify_oop(rax);
 263     break;
 264   default       : ShouldNotReachHere();
 265   }
 266   __ ret(0);                                   // return from result handler
 267   return entry;
 268 }
 269 
 270 address TemplateInterpreterGenerator::generate_safept_entry_for(
 271         TosState state,
 272         address runtime_entry) {
 273   address entry = __ pc();
 274   __ push(state);
 275   __ call_VM(noreg, runtime_entry);
 276   __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
 277   return entry;
 278 }
 279 
 280 
 281 
 282 // Helpers for commoning out cases in the various type of method entries.
 283 //
 284 
 285 
 286 // increment invocation count & check for overflow
 287 //
 288 // Note: checking for negative value instead of overflow
 289 //       so we have a 'sticky' overflow test
 290 //
 291 // rbx: method
 292 // ecx: invocation counter
 293 //
 294 void InterpreterGenerator::generate_counter_incr(
 295         Label* overflow,
 296         Label* profile_method,
 297         Label* profile_method_continue) {
 298   Label done;
 299   // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
 300   if (TieredCompilation) {
 301     int increment = InvocationCounter::count_increment;
 302     Label no_mdo;
 303     if (ProfileInterpreter) {
 304       // Are we profiling?
 305       __ movptr(rax, Address(rbx, Method::method_data_offset()));
 306       __ testptr(rax, rax);
 307       __ jccb(Assembler::zero, no_mdo);
 308       // Increment counter in the MDO
 309       const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
 310                                                 in_bytes(InvocationCounter::counter_offset()));
 311       const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
 312       __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
 313       __ jmp(done);
 314     }
 315     __ bind(no_mdo);
 316     // Increment counter in MethodCounters
 317     const Address invocation_counter(rax,
 318                   MethodCounters::invocation_counter_offset() +
 319                   InvocationCounter::counter_offset());
 320     __ get_method_counters(rbx, rax, done);
 321     const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
 322     __ increment_mask_and_jump(invocation_counter, increment, mask, rcx,
 323                                false, Assembler::zero, overflow);
 324     __ bind(done);
 325   } else { // not TieredCompilation
 326     const Address backedge_counter(rax,
 327                   MethodCounters::backedge_counter_offset() +
 328                   InvocationCounter::counter_offset());
 329     const Address invocation_counter(rax,
 330                   MethodCounters::invocation_counter_offset() +
 331                   InvocationCounter::counter_offset());
 332 
 333     __ get_method_counters(rbx, rax, done);
 334 
 335     if (ProfileInterpreter) {
 336       __ incrementl(Address(rax,
 337               MethodCounters::interpreter_invocation_counter_offset()));
 338     }
 339     // Update standard invocation counters
 340     __ movl(rcx, invocation_counter);
 341     __ incrementl(rcx, InvocationCounter::count_increment);
 342     __ movl(invocation_counter, rcx); // save invocation count
 343 
 344     __ movl(rax, backedge_counter);   // load backedge counter
 345     __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
 346 
 347     __ addl(rcx, rax);                // add both counters
 348 
 349     // profile_method is non-null only for interpreted method so
 350     // profile_method != NULL == !native_call
 351 
 352     if (ProfileInterpreter && profile_method != NULL) {
 353       // Test to see if we should create a method data oop
 354       __ movptr(rax, Address(rbx, Method::method_counters_offset()));
 355       __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
 356       __ jcc(Assembler::less, *profile_method_continue);
 357 
 358       // if no method data exists, go to profile_method
 359       __ test_method_data_pointer(rax, *profile_method);
 360     }
 361 
 362     __ movptr(rax, Address(rbx, Method::method_counters_offset()));
 363     __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
 364     __ jcc(Assembler::aboveEqual, *overflow);
 365     __ bind(done);
 366   }
 367 }
 368 
 369 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {
 370 
 371   // Asm interpreter on entry
 372   // r14 - locals
 373   // r13 - bcp
 374   // rbx - method
 375   // edx - cpool --- DOES NOT APPEAR TO BE TRUE
 376   // rbp - interpreter frame
 377 
 378   // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
 379   // Everything as it was on entry
 380   // rdx is not restored. Doesn't appear to really be set.
 381 
 382   // InterpreterRuntime::frequency_counter_overflow takes two
 383   // arguments, the first (thread) is passed by call_VM, the second
 384   // indicates if the counter overflow occurs at a backwards branch
 385   // (NULL bcp).  We pass zero for it.  The call returns the address
 386   // of the verified entry point for the method or NULL if the
 387   // compilation did not complete (either went background or bailed
 388   // out).
 389   __ movl(c_rarg1, 0);
 390   __ call_VM(noreg,
 391              CAST_FROM_FN_PTR(address,
 392                               InterpreterRuntime::frequency_counter_overflow),
 393              c_rarg1);
 394 
 395   __ movptr(rbx, Address(rbp, method_offset));   // restore Method*
 396   // Preserve invariant that r13/r14 contain bcp/locals of sender frame
 397   // and jump to the interpreted entry.
 398   __ jmp(*do_continue, relocInfo::none);
 399 }
 400 
 401 // See if we've got enough room on the stack for locals plus overhead.
 402 // The expression stack grows down incrementally, so the normal guard
 403 // page mechanism will work for that.
 404 //
 405 // NOTE: Since the additional locals are also always pushed (wasn't
 406 // obvious in generate_fixed_frame) so the guard should work for them
 407 // too.
 408 //
 409 // Args:
 410 //      rdx: number of additional locals this frame needs (what we must check)
 411 //      rbx: Method*
 412 //
 413 // Kills:
 414 //      rax
 415 void InterpreterGenerator::generate_stack_overflow_check(void) {
 416 
 417   // monitor entry size: see picture of stack in frame_x86.hpp
 418   const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
 419 
 420   // total overhead size: entry_size + (saved rbp through expr stack
 421   // bottom).  be sure to change this if you add/subtract anything
 422   // to/from the overhead area
 423   const int overhead_size =
 424     -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
 425 
 426   const int page_size = os::vm_page_size();
 427 
 428   Label after_frame_check;
 429 
 430   // see if the frame is greater than one page in size. If so,
 431   // then we need to verify there is enough stack space remaining
 432   // for the additional locals.
 433   __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
 434   __ jcc(Assembler::belowEqual, after_frame_check);
 435 
 436   // compute rsp as if this were going to be the last frame on
 437   // the stack before the red zone
 438 
 439   const Address stack_base(r15_thread, Thread::stack_base_offset());
 440   const Address stack_size(r15_thread, Thread::stack_size_offset());
 441 
 442   // locals + overhead, in bytes
 443   __ mov(rax, rdx);
 444   __ shlptr(rax, Interpreter::logStackElementSize);  // 2 slots per parameter.
 445   __ addptr(rax, overhead_size);
 446 
 447 #ifdef ASSERT
 448   Label stack_base_okay, stack_size_okay;
 449   // verify that thread stack base is non-zero
 450   __ cmpptr(stack_base, (int32_t)NULL_WORD);
 451   __ jcc(Assembler::notEqual, stack_base_okay);
 452   __ stop("stack base is zero");
 453   __ bind(stack_base_okay);
 454   // verify that thread stack size is non-zero
 455   __ cmpptr(stack_size, 0);
 456   __ jcc(Assembler::notEqual, stack_size_okay);
 457   __ stop("stack size is zero");
 458   __ bind(stack_size_okay);
 459 #endif
 460 
 461   // Add stack base to locals and subtract stack size
 462   __ addptr(rax, stack_base);
 463   __ subptr(rax, stack_size);
 464 
 465   // Use the maximum number of pages we might bang.
 466   const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages :
 467                                                                               (StackRedPages+StackYellowPages);
 468 
 469   // add in the red and yellow zone sizes
 470   __ addptr(rax, max_pages * page_size);
 471 
 472   // check against the current stack bottom
 473   __ cmpptr(rsp, rax);
 474   __ jcc(Assembler::above, after_frame_check);
 475 
 476   // Restore sender's sp as SP. This is necessary if the sender's
 477   // frame is an extended compiled frame (see gen_c2i_adapter())
 478   // and safer anyway in case of JSR292 adaptations.
 479 
 480   __ pop(rax); // return address must be moved if SP is changed
 481   __ mov(rsp, r13);
 482   __ push(rax);
 483 
 484   // Note: the restored frame is not necessarily interpreted.
 485   // Use the shared runtime version of the StackOverflowError.
 486   assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
 487   __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
 488 
 489   // all done with frame size check
 490   __ bind(after_frame_check);
 491 }
 492 
 493 // Allocate monitor and lock method (asm interpreter)
 494 //
 495 // Args:
 496 //      rbx: Method*
 497 //      r14: locals
 498 //
 499 // Kills:
 500 //      rax
 501 //      c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
 502 //      rscratch1, rscratch2 (scratch regs)
 503 void InterpreterGenerator::lock_method(void) {
 504   // synchronize method
 505   const Address access_flags(rbx, Method::access_flags_offset());
 506   const Address monitor_block_top(
 507         rbp,
 508         frame::interpreter_frame_monitor_block_top_offset * wordSize);
 509   const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
 510 
 511 #ifdef ASSERT
 512   {
 513     Label L;
 514     __ movl(rax, access_flags);
 515     __ testl(rax, JVM_ACC_SYNCHRONIZED);
 516     __ jcc(Assembler::notZero, L);
 517     __ stop("method doesn't need synchronization");
 518     __ bind(L);
 519   }
 520 #endif // ASSERT
 521 
 522   // get synchronization object
 523   {
 524     const int mirror_offset = in_bytes(Klass::java_mirror_offset());
 525     Label done;
 526     __ movl(rax, access_flags);
 527     __ testl(rax, JVM_ACC_STATIC);
 528     // get receiver (assume this is frequent case)
 529     __ movptr(rax, Address(r14, Interpreter::local_offset_in_bytes(0)));
 530     __ jcc(Assembler::zero, done);
 531     __ movptr(rax, Address(rbx, Method::const_offset()));
 532     __ movptr(rax, Address(rax, ConstMethod::constants_offset()));
 533     __ movptr(rax, Address(rax,
 534                            ConstantPool::pool_holder_offset_in_bytes()));
 535     __ movptr(rax, Address(rax, mirror_offset));
 536 
 537 #ifdef ASSERT
 538     {
 539       Label L;
 540       __ testptr(rax, rax);
 541       __ jcc(Assembler::notZero, L);
 542       __ stop("synchronization object is NULL");
 543       __ bind(L);
 544     }
 545 #endif // ASSERT
 546 
 547     __ bind(done);
 548   }
 549 
 550   // add space for monitor & lock
 551   __ subptr(rsp, entry_size); // add space for a monitor entry
 552   __ movptr(monitor_block_top, rsp);  // set new monitor block top
 553   // store object
 554   __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
 555   __ movptr(c_rarg1, rsp); // object address
 556   __ lock_object(c_rarg1);
 557 }
 558 
 559 // Generate a fixed interpreter frame. This is identical setup for
 560 // interpreted methods and for native methods hence the shared code.
 561 //
 562 // Args:
 563 //      rax: return address
 564 //      rbx: Method*
 565 //      r14: pointer to locals
 566 //      r13: sender sp
 567 //      rdx: cp cache
 568 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
 569   // initialize fixed part of activation frame
 570   __ push(rax);        // save return address
 571   __ enter();          // save old & set new rbp
 572   __ push(r13);        // set sender sp
 573   __ push((int)NULL_WORD); // leave last_sp as null
 574   __ movptr(r13, Address(rbx, Method::const_offset()));      // get ConstMethod*
 575   __ lea(r13, Address(r13, ConstMethod::codes_offset())); // get codebase
 576   __ push(rbx);        // save Method*
 577   if (ProfileInterpreter) {
 578     Label method_data_continue;
 579     __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
 580     __ testptr(rdx, rdx);
 581     __ jcc(Assembler::zero, method_data_continue);
 582     __ addptr(rdx, in_bytes(MethodData::data_offset()));
 583     __ bind(method_data_continue);
 584     __ push(rdx);      // set the mdp (method data pointer)
 585   } else {
 586     __ push(0);
 587   }
 588 
 589   __ movptr(rdx, Address(rbx, Method::const_offset()));
 590   __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
 591   __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
 592   __ push(rdx); // set constant pool cache
 593   __ push(r14); // set locals pointer
 594   if (native_call) {
 595     __ push(0); // no bcp
 596   } else {
 597     __ push(r13); // set bcp
 598   }
 599   __ push(0); // reserve word for pointer to expression stack bottom
 600   __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
 601 }
 602 
 603 // End of helpers
 604 
 605 // Method entry for java.lang.ref.Reference.get.
 606 address InterpreterGenerator::generate_Reference_get_entry(void) {
 607 #if INCLUDE_ALL_GCS
 608   // Code: _aload_0, _getfield, _areturn
 609   // parameter size = 1
 610   //
 611   // The code that gets generated by this routine is split into 2 parts:
 612   //    1. The "intrinsified" code for G1 (or any SATB based GC),
 613   //    2. The slow path - which is an expansion of the regular method entry.
 614   //
 615   // Notes:-
 616   // * In the G1 code we do not check whether we need to block for
 617   //   a safepoint. If G1 is enabled then we must execute the specialized
 618   //   code for Reference.get (except when the Reference object is null)
 619   //   so that we can log the value in the referent field with an SATB
 620   //   update buffer.
 621   //   If the code for the getfield template is modified so that the
 622   //   G1 pre-barrier code is executed when the current method is
 623   //   Reference.get() then going through the normal method entry
 624   //   will be fine.
 625   // * The G1 code can, however, check the receiver object (the instance
 626   //   of java.lang.Reference) and jump to the slow path if null. If the
 627   //   Reference object is null then we obviously cannot fetch the referent
 628   //   and so we don't need to call the G1 pre-barrier. Thus we can use the
 629   //   regular method entry code to generate the NPE.
 630   //
 631   // rbx: Method*
 632 
 633   // r13: senderSP must preserve for slow path, set SP to it on fast path
 634 
 635   address entry = __ pc();
 636 
 637   const int referent_offset = java_lang_ref_Reference::referent_offset;
 638   guarantee(referent_offset > 0, "referent offset not initialized");
 639 
 640   if (UseG1GC) {
 641     Label slow_path;
 642     // rbx: method
 643 
 644     // Check if local 0 != NULL
 645     // If the receiver is null then it is OK to jump to the slow path.
 646     __ movptr(rax, Address(rsp, wordSize));
 647 
 648     __ testptr(rax, rax);
 649     __ jcc(Assembler::zero, slow_path);
 650 
 651     // rax: local 0
 652     // rbx: method (but can be used as scratch now)
 653     // rdx: scratch
 654     // rdi: scratch
 655 
 656     // Generate the G1 pre-barrier code to log the value of
 657     // the referent field in an SATB buffer.
 658 
 659     // Load the value of the referent field.
 660     const Address field_address(rax, referent_offset);
 661     __ load_heap_oop(rax, field_address);
 662 
 663     // Generate the G1 pre-barrier code to log the value of
 664     // the referent field in an SATB buffer.
 665     __ g1_write_barrier_pre(noreg /* obj */,
 666                             rax /* pre_val */,
 667                             r15_thread /* thread */,
 668                             rbx /* tmp */,
 669                             true /* tosca_live */,
 670                             true /* expand_call */);
 671 
 672     // _areturn
 673     __ pop(rdi);                // get return address
 674     __ mov(rsp, r13);           // set sp to sender sp
 675     __ jmp(rdi);
 676     __ ret(0);
 677 
 678     // generate a vanilla interpreter entry as the slow path
 679     __ bind(slow_path);
 680     __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
 681     return entry;
 682   }
 683 #endif // INCLUDE_ALL_GCS
 684 
 685   // If G1 is not enabled then attempt to go through the accessor entry point
 686   // Reference.get is an accessor
 687   return NULL;
 688 }
 689 
 690 /**
 691  * Method entry for static native methods:
 692  *   int java.util.zip.CRC32.update(int crc, int b)
 693  */
 694 address InterpreterGenerator::generate_CRC32_update_entry() {
 695   if (UseCRC32Intrinsics) {
 696     address entry = __ pc();
 697 
 698     // rbx,: Method*
 699     // r13: senderSP must preserved for slow path, set SP to it on fast path
 700     // c_rarg0: scratch (rdi on non-Win64, rcx on Win64)
 701     // c_rarg1: scratch (rsi on non-Win64, rdx on Win64)
 702 
 703     Label slow_path;
 704     // If we need a safepoint check, generate full interpreter entry.
 705     ExternalAddress state(SafepointSynchronize::address_of_state());
 706     __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
 707              SafepointSynchronize::_not_synchronized);
 708     __ jcc(Assembler::notEqual, slow_path);
 709 
 710     // We don't generate local frame and don't align stack because
 711     // we call stub code and there is no safepoint on this path.
 712 
 713     // Load parameters
 714     const Register crc = rax;  // crc
 715     const Register val = c_rarg0;  // source java byte value
 716     const Register tbl = c_rarg1;  // scratch
 717 
 718     // Arguments are reversed on java expression stack
 719     __ movl(val, Address(rsp,   wordSize)); // byte value
 720     __ movl(crc, Address(rsp, 2*wordSize)); // Initial CRC
 721 
 722     __ lea(tbl, ExternalAddress(StubRoutines::crc_table_addr()));
 723     __ notl(crc); // ~crc
 724     __ update_byte_crc32(crc, val, tbl);
 725     __ notl(crc); // ~crc
 726     // result in rax
 727 
 728     // _areturn
 729     __ pop(rdi);                // get return address
 730     __ mov(rsp, r13);           // set sp to sender sp
 731     __ jmp(rdi);
 732 
 733     // generate a vanilla native entry as the slow path
 734     __ bind(slow_path);
 735     __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
 736     return entry;
 737   }
 738   return NULL;
 739 }
 740 
 741 /**
 742  * Method entry for static native methods:
 743  *   int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
 744  *   int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
 745  */
 746 address InterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
 747   if (UseCRC32Intrinsics) {
 748     address entry = __ pc();
 749 
 750     // rbx,: Method*
 751     // r13: senderSP must preserved for slow path, set SP to it on fast path
 752 
 753     Label slow_path;
 754     // If we need a safepoint check, generate full interpreter entry.
 755     ExternalAddress state(SafepointSynchronize::address_of_state());
 756     __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
 757              SafepointSynchronize::_not_synchronized);
 758     __ jcc(Assembler::notEqual, slow_path);
 759 
 760     // We don't generate local frame and don't align stack because
 761     // we call stub code and there is no safepoint on this path.
 762 
 763     // Load parameters
 764     const Register crc = c_rarg0;  // crc
 765     const Register buf = c_rarg1;  // source java byte array address
 766     const Register len = c_rarg2;  // length
 767     const Register off = len;      // offset (never overlaps with 'len')
 768 
 769     // Arguments are reversed on java expression stack
 770     // Calculate address of start element
 771     if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) {
 772       __ movptr(buf, Address(rsp, 3*wordSize)); // long buf
 773       __ movl2ptr(off, Address(rsp, 2*wordSize)); // offset
 774       __ addq(buf, off); // + offset
 775       __ movl(crc,   Address(rsp, 5*wordSize)); // Initial CRC
 776     } else {
 777       __ movptr(buf, Address(rsp, 3*wordSize)); // byte[] array
 778       __ addptr(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
 779       __ movl2ptr(off, Address(rsp, 2*wordSize)); // offset
 780       __ addq(buf, off); // + offset
 781       __ movl(crc,   Address(rsp, 4*wordSize)); // Initial CRC
 782     }
 783     // Can now load 'len' since we're finished with 'off'
 784     __ movl(len, Address(rsp, wordSize)); // Length
 785 
 786     __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32()), crc, buf, len);
 787     // result in rax
 788 
 789     // _areturn
 790     __ pop(rdi);                // get return address
 791     __ mov(rsp, r13);           // set sp to sender sp
 792     __ jmp(rdi);
 793 
 794     // generate a vanilla native entry as the slow path
 795     __ bind(slow_path);
 796     __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
 797     return entry;
 798   }
 799   return NULL;
 800 }
 801 
 802 /**
 803 * Method entry for static native methods:
 804 *   int java.util.zip.CRC32C.updateBytes(int crc, byte[] b, int off, int end)
 805 *   int java.util.zip.CRC32C.updateByteBuffer(int crc, long address, int off, int end)
 806 */
 807 address InterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
 808   if (UseCRC32CIntrinsics) {
 809     address entry = __ pc();
 810     // Load parameters
 811     const Register crc = c_rarg0;  // crc
 812     const Register buf = c_rarg1;  // source java byte array address
 813     const Register len = c_rarg2;
 814     const Register off = c_rarg3;  // offset
 815     const Register end = len;
 816 
 817     // Arguments are reversed on java expression stack
 818     // Calculate address of start element
 819     if (kind == Interpreter::java_util_zip_CRC32C_updateDirectByteBuffer) {
 820       __ movptr(buf, Address(rsp, 3 * wordSize)); // long buf
 821       __ movl2ptr(off, Address(rsp, 2 * wordSize)); // offset
 822       __ addq(buf, off); // + offset
 823       __ movl(crc, Address(rsp, 5 * wordSize)); // Initial CRC
 824       // Note on 5 * wordSize vs. 4 * wordSize:
 825       // *   int java.util.zip.CRC32C.updateByteBuffer(int crc, long address, int off, int end)
 826       //                                                   4         2,3          1        0
 827       // end starts at SP + 8
 828       // The Java(R) Virtual Machine Specification Java SE 7 Edition
 829       // 4.10.2.3. Values of Types long and double
 830       //    "When calculating operand stack length, values of type long and double have length two."
 831     } else {
 832       __ movptr(buf, Address(rsp, 3 * wordSize)); // byte[] array
 833       __ addptr(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
 834       __ movl2ptr(off, Address(rsp, 2 * wordSize)); // offset
 835       __ addq(buf, off); // + offset
 836       __ movl(crc, Address(rsp, 4 * wordSize)); // Initial CRC
 837     }
 838     __ movl(end, Address(rsp, wordSize)); // end
 839     __ subl(end, off); // end - off
 840     __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32C()), crc, buf, len);
 841     // result in rax
 842     // _areturn
 843     __ pop(rdi);                // get return address
 844     __ mov(rsp, r13);           // set sp to sender sp
 845     __ jmp(rdi);
 846 
 847     return entry;
 848   }
 849 
 850   return NULL;
 851 }
 852 
 853 // Interpreter stub for calling a native method. (asm interpreter)
 854 // This sets up a somewhat different looking stack for calling the
 855 // native method than the typical interpreter frame setup.
 856 address InterpreterGenerator::generate_native_entry(bool synchronized) {
 857   // determine code generation flags
 858   bool inc_counter  = UseCompiler || CountCompiledCalls || LogTouchedMethods;
 859 
 860   // rbx: Method*
 861   // r13: sender sp
 862 
 863   address entry_point = __ pc();
 864 
 865   const Address constMethod       (rbx, Method::const_offset());
 866   const Address access_flags      (rbx, Method::access_flags_offset());
 867   const Address size_of_parameters(rcx, ConstMethod::
 868                                         size_of_parameters_offset());
 869 
 870 
 871   // get parameter size (always needed)
 872   __ movptr(rcx, constMethod);
 873   __ load_unsigned_short(rcx, size_of_parameters);
 874 
 875   // native calls don't need the stack size check since they have no
 876   // expression stack and the arguments are already on the stack and
 877   // we only add a handful of words to the stack
 878 
 879   // rbx: Method*
 880   // rcx: size of parameters
 881   // r13: sender sp
 882   __ pop(rax);                                       // get return address
 883 
 884   // for natives the size of locals is zero
 885 
 886   // compute beginning of parameters (r14)
 887   __ lea(r14, Address(rsp, rcx, Address::times_8, -wordSize));
 888 
 889   // add 2 zero-initialized slots for native calls
 890   // initialize result_handler slot
 891   __ push((int) NULL_WORD);
 892   // slot for oop temp
 893   // (static native method holder mirror/jni oop result)
 894   __ push((int) NULL_WORD);
 895 
 896   // initialize fixed part of activation frame
 897   generate_fixed_frame(true);
 898 
 899   // make sure method is native & not abstract
 900 #ifdef ASSERT
 901   __ movl(rax, access_flags);
 902   {
 903     Label L;
 904     __ testl(rax, JVM_ACC_NATIVE);
 905     __ jcc(Assembler::notZero, L);
 906     __ stop("tried to execute non-native method as native");
 907     __ bind(L);
 908   }
 909   {
 910     Label L;
 911     __ testl(rax, JVM_ACC_ABSTRACT);
 912     __ jcc(Assembler::zero, L);
 913     __ stop("tried to execute abstract method in interpreter");
 914     __ bind(L);
 915   }
 916 #endif
 917 
 918   // Since at this point in the method invocation the exception handler
 919   // would try to exit the monitor of synchronized methods which hasn't
 920   // been entered yet, we set the thread local variable
 921   // _do_not_unlock_if_synchronized to true. The remove_activation will
 922   // check this flag.
 923 
 924   const Address do_not_unlock_if_synchronized(r15_thread,
 925         in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
 926   __ movbool(do_not_unlock_if_synchronized, true);
 927 
 928   // increment invocation count & check for overflow
 929   Label invocation_counter_overflow;
 930   if (inc_counter) {
 931     generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
 932   }
 933 
 934   Label continue_after_compile;
 935   __ bind(continue_after_compile);
 936 
 937   bang_stack_shadow_pages(true);
 938 
 939   // reset the _do_not_unlock_if_synchronized flag
 940   __ movbool(do_not_unlock_if_synchronized, false);
 941 
 942   // check for synchronized methods
 943   // Must happen AFTER invocation_counter check and stack overflow check,
 944   // so method is not locked if overflows.
 945   if (synchronized) {
 946     lock_method();
 947   } else {
 948     // no synchronization necessary
 949 #ifdef ASSERT
 950     {
 951       Label L;
 952       __ movl(rax, access_flags);
 953       __ testl(rax, JVM_ACC_SYNCHRONIZED);
 954       __ jcc(Assembler::zero, L);
 955       __ stop("method needs synchronization");
 956       __ bind(L);
 957     }
 958 #endif
 959   }
 960 
 961   // start execution
 962 #ifdef ASSERT
 963   {
 964     Label L;
 965     const Address monitor_block_top(rbp,
 966                  frame::interpreter_frame_monitor_block_top_offset * wordSize);
 967     __ movptr(rax, monitor_block_top);
 968     __ cmpptr(rax, rsp);
 969     __ jcc(Assembler::equal, L);
 970     __ stop("broken stack frame setup in interpreter");
 971     __ bind(L);
 972   }
 973 #endif
 974 
 975   // jvmti support
 976   __ notify_method_entry();
 977 
 978   // work registers
 979   const Register method = rbx;
 980   const Register t      = r11;
 981 
 982   // allocate space for parameters
 983   __ get_method(method);
 984   __ movptr(t, Address(method, Method::const_offset()));
 985   __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
 986   __ shll(t, Interpreter::logStackElementSize);
 987 
 988   __ subptr(rsp, t);
 989   __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
 990   __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
 991 
 992   // get signature handler
 993   {
 994     Label L;
 995     __ movptr(t, Address(method, Method::signature_handler_offset()));
 996     __ testptr(t, t);
 997     __ jcc(Assembler::notZero, L);
 998     __ call_VM(noreg,
 999                CAST_FROM_FN_PTR(address,
1000                                 InterpreterRuntime::prepare_native_call),
1001                method);
1002     __ get_method(method);
1003     __ movptr(t, Address(method, Method::signature_handler_offset()));
1004     __ bind(L);
1005   }
1006 
1007   // call signature handler
1008   assert(InterpreterRuntime::SignatureHandlerGenerator::from() == r14,
1009          "adjust this code");
1010   assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
1011          "adjust this code");
1012   assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == rscratch1,
1013           "adjust this code");
1014 
1015   // The generated handlers do not touch RBX (the method oop).
1016   // However, large signatures cannot be cached and are generated
1017   // each time here.  The slow-path generator can do a GC on return,
1018   // so we must reload it after the call.
1019   __ call(t);
1020   __ get_method(method);        // slow path can do a GC, reload RBX
1021 
1022 
1023   // result handler is in rax
1024   // set result handler
1025   __ movptr(Address(rbp,
1026                     (frame::interpreter_frame_result_handler_offset) * wordSize),
1027             rax);
1028 
1029   // pass mirror handle if static call
1030   {
1031     Label L;
1032     const int mirror_offset = in_bytes(Klass::java_mirror_offset());
1033     __ movl(t, Address(method, Method::access_flags_offset()));
1034     __ testl(t, JVM_ACC_STATIC);
1035     __ jcc(Assembler::zero, L);
1036     // get mirror
1037     __ movptr(t, Address(method, Method::const_offset()));
1038     __ movptr(t, Address(t, ConstMethod::constants_offset()));
1039     __ movptr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes()));
1040     __ movptr(t, Address(t, mirror_offset));
1041     // copy mirror into activation frame
1042     __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
1043             t);
1044     // pass handle to mirror
1045     __ lea(c_rarg1,
1046            Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
1047     __ bind(L);
1048   }
1049 
1050   // get native function entry point
1051   {
1052     Label L;
1053     __ movptr(rax, Address(method, Method::native_function_offset()));
1054     ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1055     __ movptr(rscratch2, unsatisfied.addr());
1056     __ cmpptr(rax, rscratch2);
1057     __ jcc(Assembler::notEqual, L);
1058     __ call_VM(noreg,
1059                CAST_FROM_FN_PTR(address,
1060                                 InterpreterRuntime::prepare_native_call),
1061                method);
1062     __ get_method(method);
1063     __ movptr(rax, Address(method, Method::native_function_offset()));
1064     __ bind(L);
1065   }
1066 
1067   // pass JNIEnv
1068   __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
1069 
1070   // It is enough that the pc() points into the right code
1071   // segment. It does not have to be the correct return pc.
1072   __ set_last_Java_frame(rsp, rbp, (address) __ pc());
1073 
1074   // change thread state
1075 #ifdef ASSERT
1076   {
1077     Label L;
1078     __ movl(t, Address(r15_thread, JavaThread::thread_state_offset()));
1079     __ cmpl(t, _thread_in_Java);
1080     __ jcc(Assembler::equal, L);
1081     __ stop("Wrong thread state in native stub");
1082     __ bind(L);
1083   }
1084 #endif
1085 
1086   // Change state to native
1087 
1088   __ movl(Address(r15_thread, JavaThread::thread_state_offset()),
1089           _thread_in_native);
1090 
1091   // Call the native method.
1092   __ call(rax);
1093   // result potentially in rax or xmm0
1094 
1095   // Verify or restore cpu control state after JNI call
1096   __ restore_cpu_control_state_after_jni();
1097 
1098   // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1099   // in order to extract the result of a method call. If the order of these
1100   // pushes change or anything else is added to the stack then the code in
1101   // interpreter_frame_result must also change.
1102 
1103   __ push(dtos);
1104   __ push(ltos);
1105 
1106   // change thread state
1107   __ movl(Address(r15_thread, JavaThread::thread_state_offset()),
1108           _thread_in_native_trans);
1109 
1110   if (os::is_MP()) {
1111     if (UseMembar) {
1112       // Force this write out before the read below
1113       __ membar(Assembler::Membar_mask_bits(
1114            Assembler::LoadLoad | Assembler::LoadStore |
1115            Assembler::StoreLoad | Assembler::StoreStore));
1116     } else {
1117       // Write serialization page so VM thread can do a pseudo remote membar.
1118       // We use the current thread pointer to calculate a thread specific
1119       // offset to write to within the page. This minimizes bus traffic
1120       // due to cache line collision.
1121       __ serialize_memory(r15_thread, rscratch2);
1122     }
1123   }
1124 
1125   // check for safepoint operation in progress and/or pending suspend requests
1126   {
1127     Label Continue;
1128     __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
1129              SafepointSynchronize::_not_synchronized);
1130 
1131     Label L;
1132     __ jcc(Assembler::notEqual, L);
1133     __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0);
1134     __ jcc(Assembler::equal, Continue);
1135     __ bind(L);
1136 
1137     // Don't use call_VM as it will see a possible pending exception
1138     // and forward it and never return here preventing us from
1139     // clearing _last_native_pc down below.  Also can't use
1140     // call_VM_leaf either as it will check to see if r13 & r14 are
1141     // preserved and correspond to the bcp/locals pointers. So we do a
1142     // runtime call by hand.
1143     //
1144     __ mov(c_rarg0, r15_thread);
1145     __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1146     __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1147     __ andptr(rsp, -16); // align stack as required by ABI
1148     __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
1149     __ mov(rsp, r12); // restore sp
1150     __ reinit_heapbase();
1151     __ bind(Continue);
1152   }
1153 
1154   // change thread state
1155   __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_Java);
1156 
1157   // reset_last_Java_frame
1158   __ reset_last_Java_frame(true, true);
1159 
1160   // reset handle block
1161   __ movptr(t, Address(r15_thread, JavaThread::active_handles_offset()));
1162   __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD);
1163 
1164   // If result is an oop unbox and store it in frame where gc will see it
1165   // and result handler will pick it up
1166 
1167   {
1168     Label no_oop, store_result;
1169     __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1170     __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1171     __ jcc(Assembler::notEqual, no_oop);
1172     // retrieve result
1173     __ pop(ltos);
1174     __ testptr(rax, rax);
1175     __ jcc(Assembler::zero, store_result);
1176     __ movptr(rax, Address(rax, 0));
1177     __ bind(store_result);
1178     __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
1179     // keep stack depth as expected by pushing oop which will eventually be discarde
1180     __ push(ltos);
1181     __ bind(no_oop);
1182   }
1183 
1184 
1185   {
1186     Label no_reguard;
1187     __ cmpl(Address(r15_thread, JavaThread::stack_guard_state_offset()),
1188             JavaThread::stack_guard_yellow_disabled);
1189     __ jcc(Assembler::notEqual, no_reguard);
1190 
1191     __ pusha(); // XXX only save smashed registers
1192     __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1193     __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1194     __ andptr(rsp, -16); // align stack as required by ABI
1195     __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1196     __ mov(rsp, r12); // restore sp
1197     __ popa(); // XXX only restore smashed registers
1198     __ reinit_heapbase();
1199 
1200     __ bind(no_reguard);
1201   }
1202 
1203 
1204   // The method register is junk from after the thread_in_native transition
1205   // until here.  Also can't call_VM until the bcp has been
1206   // restored.  Need bcp for throwing exception below so get it now.
1207   __ get_method(method);
1208 
1209   // restore r13 to have legal interpreter frame, i.e., bci == 0 <=>
1210   // r13 == code_base()
1211   __ movptr(r13, Address(method, Method::const_offset()));   // get ConstMethod*
1212   __ lea(r13, Address(r13, ConstMethod::codes_offset()));    // get codebase
1213   // handle exceptions (exception handling will handle unlocking!)
1214   {
1215     Label L;
1216     __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
1217     __ jcc(Assembler::zero, L);
1218     // Note: At some point we may want to unify this with the code
1219     // used in call_VM_base(); i.e., we should use the
1220     // StubRoutines::forward_exception code. For now this doesn't work
1221     // here because the rsp is not correctly set at this point.
1222     __ MacroAssembler::call_VM(noreg,
1223                                CAST_FROM_FN_PTR(address,
1224                                InterpreterRuntime::throw_pending_exception));
1225     __ should_not_reach_here();
1226     __ bind(L);
1227   }
1228 
1229   // do unlocking if necessary
1230   {
1231     Label L;
1232     __ movl(t, Address(method, Method::access_flags_offset()));
1233     __ testl(t, JVM_ACC_SYNCHRONIZED);
1234     __ jcc(Assembler::zero, L);
1235     // the code below should be shared with interpreter macro
1236     // assembler implementation
1237     {
1238       Label unlock;
1239       // BasicObjectLock will be first in list, since this is a
1240       // synchronized method. However, need to check that the object
1241       // has not been unlocked by an explicit monitorexit bytecode.
1242       const Address monitor(rbp,
1243                             (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1244                                        wordSize - sizeof(BasicObjectLock)));
1245 
1246       // monitor expect in c_rarg1 for slow unlock path
1247       __ lea(c_rarg1, monitor); // address of first monitor
1248 
1249       __ movptr(t, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
1250       __ testptr(t, t);
1251       __ jcc(Assembler::notZero, unlock);
1252 
1253       // Entry already unlocked, need to throw exception
1254       __ MacroAssembler::call_VM(noreg,
1255                                  CAST_FROM_FN_PTR(address,
1256                    InterpreterRuntime::throw_illegal_monitor_state_exception));
1257       __ should_not_reach_here();
1258 
1259       __ bind(unlock);
1260       __ unlock_object(c_rarg1);
1261     }
1262     __ bind(L);
1263   }
1264 
1265   // jvmti support
1266   // Note: This must happen _after_ handling/throwing any exceptions since
1267   //       the exception handler code notifies the runtime of method exits
1268   //       too. If this happens before, method entry/exit notifications are
1269   //       not properly paired (was bug - gri 11/22/99).
1270   __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1271 
1272   // restore potential result in edx:eax, call result handler to
1273   // restore potential result in ST0 & handle result
1274 
1275   __ pop(ltos);
1276   __ pop(dtos);
1277 
1278   __ movptr(t, Address(rbp,
1279                        (frame::interpreter_frame_result_handler_offset) * wordSize));
1280   __ call(t);
1281 
1282   // remove activation
1283   __ movptr(t, Address(rbp,
1284                        frame::interpreter_frame_sender_sp_offset *
1285                        wordSize)); // get sender sp
1286   __ leave();                                // remove frame anchor
1287   __ pop(rdi);                               // get return address
1288   __ mov(rsp, t);                            // set sp to sender sp
1289   __ jmp(rdi);
1290 
1291   if (inc_counter) {
1292     // Handle overflow of counter and compile method
1293     __ bind(invocation_counter_overflow);
1294     generate_counter_overflow(&continue_after_compile);
1295   }
1296 
1297   return entry_point;
1298 }
1299 
1300 //
1301 // Generic interpreted method entry to (asm) interpreter
1302 //
1303 address InterpreterGenerator::generate_normal_entry(bool synchronized) {
1304   // determine code generation flags
1305   bool inc_counter  = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1306 
1307   // ebx: Method*
1308   // r13: sender sp
1309   address entry_point = __ pc();
1310 
1311   const Address constMethod(rbx, Method::const_offset());
1312   const Address access_flags(rbx, Method::access_flags_offset());
1313   const Address size_of_parameters(rdx,
1314                                    ConstMethod::size_of_parameters_offset());
1315   const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
1316 
1317 
1318   // get parameter size (always needed)
1319   __ movptr(rdx, constMethod);
1320   __ load_unsigned_short(rcx, size_of_parameters);
1321 
1322   // rbx: Method*
1323   // rcx: size of parameters
1324   // r13: sender_sp (could differ from sp+wordSize if we were called via c2i )
1325 
1326   __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1327   __ subl(rdx, rcx); // rdx = no. of additional locals
1328 
1329   // YYY
1330 //   __ incrementl(rdx);
1331 //   __ andl(rdx, -2);
1332 
1333   // see if we've got enough room on the stack for locals plus overhead.
1334   generate_stack_overflow_check();
1335 
1336   // get return address
1337   __ pop(rax);
1338 
1339   // compute beginning of parameters (r14)
1340   __ lea(r14, Address(rsp, rcx, Address::times_8, -wordSize));
1341 
1342   // rdx - # of additional locals
1343   // allocate space for locals
1344   // explicitly initialize locals
1345   {
1346     Label exit, loop;
1347     __ testl(rdx, rdx);
1348     __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1349     __ bind(loop);
1350     __ push((int) NULL_WORD); // initialize local variables
1351     __ decrementl(rdx); // until everything initialized
1352     __ jcc(Assembler::greater, loop);
1353     __ bind(exit);
1354   }
1355 
1356   // initialize fixed part of activation frame
1357   generate_fixed_frame(false);
1358 
1359   // make sure method is not native & not abstract
1360 #ifdef ASSERT
1361   __ movl(rax, access_flags);
1362   {
1363     Label L;
1364     __ testl(rax, JVM_ACC_NATIVE);
1365     __ jcc(Assembler::zero, L);
1366     __ stop("tried to execute native method as non-native");
1367     __ bind(L);
1368   }
1369   {
1370     Label L;
1371     __ testl(rax, JVM_ACC_ABSTRACT);
1372     __ jcc(Assembler::zero, L);
1373     __ stop("tried to execute abstract method in interpreter");
1374     __ bind(L);
1375   }
1376 #endif
1377 
1378   // Since at this point in the method invocation the exception
1379   // handler would try to exit the monitor of synchronized methods
1380   // which hasn't been entered yet, we set the thread local variable
1381   // _do_not_unlock_if_synchronized to true. The remove_activation
1382   // will check this flag.
1383 
1384   const Address do_not_unlock_if_synchronized(r15_thread,
1385         in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1386   __ movbool(do_not_unlock_if_synchronized, true);
1387 
1388   __ profile_parameters_type(rax, rcx, rdx);
1389   // increment invocation count & check for overflow
1390   Label invocation_counter_overflow;
1391   Label profile_method;
1392   Label profile_method_continue;
1393   if (inc_counter) {
1394     generate_counter_incr(&invocation_counter_overflow,
1395                           &profile_method,
1396                           &profile_method_continue);
1397     if (ProfileInterpreter) {
1398       __ bind(profile_method_continue);
1399     }
1400   }
1401 
1402   Label continue_after_compile;
1403   __ bind(continue_after_compile);
1404 
1405   // check for synchronized interpreted methods
1406   bang_stack_shadow_pages(false);
1407 
1408   // reset the _do_not_unlock_if_synchronized flag
1409   __ movbool(do_not_unlock_if_synchronized, false);
1410 
1411   // check for synchronized methods
1412   // Must happen AFTER invocation_counter check and stack overflow check,
1413   // so method is not locked if overflows.
1414   if (synchronized) {
1415     // Allocate monitor and lock method
1416     lock_method();
1417   } else {
1418     // no synchronization necessary
1419 #ifdef ASSERT
1420     {
1421       Label L;
1422       __ movl(rax, access_flags);
1423       __ testl(rax, JVM_ACC_SYNCHRONIZED);
1424       __ jcc(Assembler::zero, L);
1425       __ stop("method needs synchronization");
1426       __ bind(L);
1427     }
1428 #endif
1429   }
1430 
1431   // start execution
1432 #ifdef ASSERT
1433   {
1434     Label L;
1435      const Address monitor_block_top (rbp,
1436                  frame::interpreter_frame_monitor_block_top_offset * wordSize);
1437     __ movptr(rax, monitor_block_top);
1438     __ cmpptr(rax, rsp);
1439     __ jcc(Assembler::equal, L);
1440     __ stop("broken stack frame setup in interpreter");
1441     __ bind(L);
1442   }
1443 #endif
1444 
1445   // jvmti support
1446   __ notify_method_entry();
1447 
1448   __ dispatch_next(vtos);
1449 
1450   // invocation counter overflow
1451   if (inc_counter) {
1452     if (ProfileInterpreter) {
1453       // We have decided to profile this method in the interpreter
1454       __ bind(profile_method);
1455       __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1456       __ set_method_data_pointer_for_bcp();
1457       __ get_method(rbx);
1458       __ jmp(profile_method_continue);
1459     }
1460     // Handle overflow of counter and compile method
1461     __ bind(invocation_counter_overflow);
1462     generate_counter_overflow(&continue_after_compile);
1463   }
1464 
1465   return entry_point;
1466 }
1467 
1468 
1469 // These should never be compiled since the interpreter will prefer
1470 // the compiled version to the intrinsic version.
1471 bool AbstractInterpreter::can_be_compiled(methodHandle m) {
1472   switch (method_kind(m)) {
1473     case Interpreter::java_lang_math_sin     : // fall thru
1474     case Interpreter::java_lang_math_cos     : // fall thru
1475     case Interpreter::java_lang_math_tan     : // fall thru
1476     case Interpreter::java_lang_math_abs     : // fall thru
1477     case Interpreter::java_lang_math_log     : // fall thru
1478     case Interpreter::java_lang_math_log10   : // fall thru
1479     case Interpreter::java_lang_math_sqrt    : // fall thru
1480     case Interpreter::java_lang_math_pow     : // fall thru
1481     case Interpreter::java_lang_math_exp     :
1482       return false;
1483     default:
1484       return true;
1485   }
1486 }
1487 
1488 // How much stack a method activation needs in words.
1489 int AbstractInterpreter::size_top_interpreter_activation(Method* method) {
1490   const int entry_size = frame::interpreter_frame_monitor_size();
1491 
1492   // total overhead size: entry_size + (saved rbp thru expr stack
1493   // bottom).  be sure to change this if you add/subtract anything
1494   // to/from the overhead area
1495   const int overhead_size =
1496     -(frame::interpreter_frame_initial_sp_offset) + entry_size;
1497 
1498   const int stub_code = frame::entry_frame_after_call_words;
1499   const int method_stack = (method->max_locals() + method->max_stack()) *
1500                            Interpreter::stackElementWords;
1501   return (overhead_size + method_stack + stub_code);
1502 }
1503 
1504 //-----------------------------------------------------------------------------
1505 // Exceptions
1506 
1507 void TemplateInterpreterGenerator::generate_throw_exception() {
1508   // Entry point in previous activation (i.e., if the caller was
1509   // interpreted)
1510   Interpreter::_rethrow_exception_entry = __ pc();
1511   // Restore sp to interpreter_frame_last_sp even though we are going
1512   // to empty the expression stack for the exception processing.
1513   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1514   // rax: exception
1515   // rdx: return address/pc that threw exception
1516   __ restore_bcp();    // r13 points to call/send
1517   __ restore_locals();
1518   __ reinit_heapbase();  // restore r12 as heapbase.
1519   // Entry point for exceptions thrown within interpreter code
1520   Interpreter::_throw_exception_entry = __ pc();
1521   // expression stack is undefined here
1522   // rax: exception
1523   // r13: exception bcp
1524   __ verify_oop(rax);
1525   __ mov(c_rarg1, rax);
1526 
1527   // expression stack must be empty before entering the VM in case of
1528   // an exception
1529   __ empty_expression_stack();
1530   // find exception handler address and preserve exception oop
1531   __ call_VM(rdx,
1532              CAST_FROM_FN_PTR(address,
1533                           InterpreterRuntime::exception_handler_for_exception),
1534              c_rarg1);
1535   // rax: exception handler entry point
1536   // rdx: preserved exception oop
1537   // r13: bcp for exception handler
1538   __ push_ptr(rdx); // push exception which is now the only value on the stack
1539   __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1540 
1541   // If the exception is not handled in the current frame the frame is
1542   // removed and the exception is rethrown (i.e. exception
1543   // continuation is _rethrow_exception).
1544   //
1545   // Note: At this point the bci is still the bxi for the instruction
1546   // which caused the exception and the expression stack is
1547   // empty. Thus, for any VM calls at this point, GC will find a legal
1548   // oop map (with empty expression stack).
1549 
1550   // In current activation
1551   // tos: exception
1552   // esi: exception bcp
1553 
1554   //
1555   // JVMTI PopFrame support
1556   //
1557 
1558   Interpreter::_remove_activation_preserving_args_entry = __ pc();
1559   __ empty_expression_stack();
1560   // Set the popframe_processing bit in pending_popframe_condition
1561   // indicating that we are currently handling popframe, so that
1562   // call_VMs that may happen later do not trigger new popframe
1563   // handling cycles.
1564   __ movl(rdx, Address(r15_thread, JavaThread::popframe_condition_offset()));
1565   __ orl(rdx, JavaThread::popframe_processing_bit);
1566   __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()), rdx);
1567 
1568   {
1569     // Check to see whether we are returning to a deoptimized frame.
1570     // (The PopFrame call ensures that the caller of the popped frame is
1571     // either interpreted or compiled and deoptimizes it if compiled.)
1572     // In this case, we can't call dispatch_next() after the frame is
1573     // popped, but instead must save the incoming arguments and restore
1574     // them after deoptimization has occurred.
1575     //
1576     // Note that we don't compare the return PC against the
1577     // deoptimization blob's unpack entry because of the presence of
1578     // adapter frames in C2.
1579     Label caller_not_deoptimized;
1580     __ movptr(c_rarg1, Address(rbp, frame::return_addr_offset * wordSize));
1581     __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1582                                InterpreterRuntime::interpreter_contains), c_rarg1);
1583     __ testl(rax, rax);
1584     __ jcc(Assembler::notZero, caller_not_deoptimized);
1585 
1586     // Compute size of arguments for saving when returning to
1587     // deoptimized caller
1588     __ get_method(rax);
1589     __ movptr(rax, Address(rax, Method::const_offset()));
1590     __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
1591                                                 size_of_parameters_offset())));
1592     __ shll(rax, Interpreter::logStackElementSize);
1593     __ restore_locals(); // XXX do we need this?
1594     __ subptr(r14, rax);
1595     __ addptr(r14, wordSize);
1596     // Save these arguments
1597     __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1598                                            Deoptimization::
1599                                            popframe_preserve_args),
1600                           r15_thread, rax, r14);
1601 
1602     __ remove_activation(vtos, rdx,
1603                          /* throw_monitor_exception */ false,
1604                          /* install_monitor_exception */ false,
1605                          /* notify_jvmdi */ false);
1606 
1607     // Inform deoptimization that it is responsible for restoring
1608     // these arguments
1609     __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()),
1610             JavaThread::popframe_force_deopt_reexecution_bit);
1611 
1612     // Continue in deoptimization handler
1613     __ jmp(rdx);
1614 
1615     __ bind(caller_not_deoptimized);
1616   }
1617 
1618   __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
1619                        /* throw_monitor_exception */ false,
1620                        /* install_monitor_exception */ false,
1621                        /* notify_jvmdi */ false);
1622 
1623   // Finish with popframe handling
1624   // A previous I2C followed by a deoptimization might have moved the
1625   // outgoing arguments further up the stack. PopFrame expects the
1626   // mutations to those outgoing arguments to be preserved and other
1627   // constraints basically require this frame to look exactly as
1628   // though it had previously invoked an interpreted activation with
1629   // no space between the top of the expression stack (current
1630   // last_sp) and the top of stack. Rather than force deopt to
1631   // maintain this kind of invariant all the time we call a small
1632   // fixup routine to move the mutated arguments onto the top of our
1633   // expression stack if necessary.
1634   __ mov(c_rarg1, rsp);
1635   __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1636   // PC must point into interpreter here
1637   __ set_last_Java_frame(noreg, rbp, __ pc());
1638   __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
1639   __ reset_last_Java_frame(true, true);
1640   // Restore the last_sp and null it out
1641   __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1642   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1643 
1644   __ restore_bcp();  // XXX do we need this?
1645   __ restore_locals(); // XXX do we need this?
1646   // The method data pointer was incremented already during
1647   // call profiling. We have to restore the mdp for the current bcp.
1648   if (ProfileInterpreter) {
1649     __ set_method_data_pointer_for_bcp();
1650   }
1651 
1652   // Clear the popframe condition flag
1653   __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()),
1654           JavaThread::popframe_inactive);
1655 
1656 #if INCLUDE_JVMTI
1657   {
1658     Label L_done;
1659     const Register local0 = r14;
1660 
1661     __ cmpb(Address(r13, 0), Bytecodes::_invokestatic);
1662     __ jcc(Assembler::notEqual, L_done);
1663 
1664     // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1665     // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1666 
1667     __ get_method(rdx);
1668     __ movptr(rax, Address(local0, 0));
1669     __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, r13);
1670 
1671     __ testptr(rax, rax);
1672     __ jcc(Assembler::zero, L_done);
1673 
1674     __ movptr(Address(rbx, 0), rax);
1675     __ bind(L_done);
1676   }
1677 #endif // INCLUDE_JVMTI
1678 
1679   __ dispatch_next(vtos);
1680   // end of PopFrame support
1681 
1682   Interpreter::_remove_activation_entry = __ pc();
1683 
1684   // preserve exception over this code sequence
1685   __ pop_ptr(rax);
1686   __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), rax);
1687   // remove the activation (without doing throws on illegalMonitorExceptions)
1688   __ remove_activation(vtos, rdx, false, true, false);
1689   // restore exception
1690   __ get_vm_result(rax, r15_thread);
1691 
1692   // In between activations - previous activation type unknown yet
1693   // compute continuation point - the continuation point expects the
1694   // following registers set up:
1695   //
1696   // rax: exception
1697   // rdx: return address/pc that threw exception
1698   // rsp: expression stack of caller
1699   // rbp: ebp of caller
1700   __ push(rax);                                  // save exception
1701   __ push(rdx);                                  // save return address
1702   __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1703                           SharedRuntime::exception_handler_for_return_address),
1704                         r15_thread, rdx);
1705   __ mov(rbx, rax);                              // save exception handler
1706   __ pop(rdx);                                   // restore return address
1707   __ pop(rax);                                   // restore exception
1708   // Note that an "issuing PC" is actually the next PC after the call
1709   __ jmp(rbx);                                   // jump to exception
1710                                                  // handler of caller
1711 }
1712 
1713 
1714 //
1715 // JVMTI ForceEarlyReturn support
1716 //
1717 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1718   address entry = __ pc();
1719 
1720   __ restore_bcp();
1721   __ restore_locals();
1722   __ empty_expression_stack();
1723   __ load_earlyret_value(state);
1724 
1725   __ movptr(rdx, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
1726   Address cond_addr(rdx, JvmtiThreadState::earlyret_state_offset());
1727 
1728   // Clear the earlyret state
1729   __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1730 
1731   __ remove_activation(state, rsi,
1732                        false, /* throw_monitor_exception */
1733                        false, /* install_monitor_exception */
1734                        true); /* notify_jvmdi */
1735   __ jmp(rsi);
1736 
1737   return entry;
1738 } // end of ForceEarlyReturn support
1739 
1740 
1741 //-----------------------------------------------------------------------------
1742 // Helper for vtos entry point generation
1743 
1744 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1745                                                          address& bep,
1746                                                          address& cep,
1747                                                          address& sep,
1748                                                          address& aep,
1749                                                          address& iep,
1750                                                          address& lep,
1751                                                          address& fep,
1752                                                          address& dep,
1753                                                          address& vep) {
1754   assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1755   Label L;
1756   aep = __ pc();  __ push_ptr();   __ jmp(L);
1757   fep = __ pc();  __ push_f(xmm0); __ jmp(L);
1758   dep = __ pc();  __ push_d(xmm0); __ jmp(L);
1759   lep = __ pc();  __ push_l();     __ jmp(L);
1760   bep = cep = sep =
1761   iep = __ pc();  __ push_i();
1762   vep = __ pc();
1763   __ bind(L);
1764   generate_and_dispatch(t);
1765 }
1766 
1767 
1768 //-----------------------------------------------------------------------------
1769 // Generation of individual instructions
1770 
1771 // helpers for generate_and_dispatch
1772 
1773 
1774 InterpreterGenerator::InterpreterGenerator(StubQueue* code)
1775   : TemplateInterpreterGenerator(code) {
1776    generate_all(); // down here so it can be "virtual"
1777 }
1778 
1779 //-----------------------------------------------------------------------------
1780 
1781 // Non-product code
1782 #ifndef PRODUCT
1783 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1784   address entry = __ pc();
1785 
1786   __ push(state);
1787   __ push(c_rarg0);
1788   __ push(c_rarg1);
1789   __ push(c_rarg2);
1790   __ push(c_rarg3);
1791   __ mov(c_rarg2, rax);  // Pass itos
1792 #ifdef _WIN64
1793   __ movflt(xmm3, xmm0); // Pass ftos
1794 #endif
1795   __ call_VM(noreg,
1796              CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode),
1797              c_rarg1, c_rarg2, c_rarg3);
1798   __ pop(c_rarg3);
1799   __ pop(c_rarg2);
1800   __ pop(c_rarg1);
1801   __ pop(c_rarg0);
1802   __ pop(state);
1803   __ ret(0);                                   // return from result handler
1804 
1805   return entry;
1806 }
1807 
1808 void TemplateInterpreterGenerator::count_bytecode() {
1809   __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1810 }
1811 
1812 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1813   __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1814 }
1815 
1816 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1817   __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
1818   __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1819   __ orl(rbx,
1820          ((int) t->bytecode()) <<
1821          BytecodePairHistogram::log2_number_of_codes);
1822   __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1823   __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
1824   __ incrementl(Address(rscratch1, rbx, Address::times_4));
1825 }
1826 
1827 
1828 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1829   // Call a little run-time stub to avoid blow-up for each bytecode.
1830   // The run-time runtime saves the right registers, depending on
1831   // the tosca in-state for the given template.
1832 
1833   assert(Interpreter::trace_code(t->tos_in()) != NULL,
1834          "entry must have been generated");
1835   __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1836   __ andptr(rsp, -16); // align stack as required by ABI
1837   __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1838   __ mov(rsp, r12); // restore sp
1839   __ reinit_heapbase();
1840 }
1841 
1842 
1843 void TemplateInterpreterGenerator::stop_interpreter_at() {
1844   Label L;
1845   __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1846            StopInterpreterAt);
1847   __ jcc(Assembler::notEqual, L);
1848   __ int3();
1849   __ bind(L);
1850 }
1851 #endif // !PRODUCT
1852 #endif // ! CC_INTERP
--- EOF ---