1 /*

        2  * Copyright 1997-2010 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

       20  * CA 95054 USA or visit www.sun.com if you need additional information or

       21  * have any questions.

       22  *

       23  */

       24 

       25 #include "incls/_precompiled.incl"

       26 #include "incls/_templateInterpreter_x86_32.cpp.incl"

       27 

       28 #define __ _masm->

       29 

       30 

       31 #ifndef CC_INTERP

       32 const int method_offset = frame::interpreter_frame_method_offset * wordSize;

       33 const int bci_offset    = frame::interpreter_frame_bcx_offset    * wordSize;

       34 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;

       35 

       36 //------------------------------------------------------------------------------------------------------------------------

       37 

       38 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {

       39   address entry = __ pc();

       40 

       41   // Note: There should be a minimal interpreter frame set up when stack

       42   // overflow occurs since we check explicitly for it now.

       43   //

       44 #ifdef ASSERT

       45   { Label L;

       46     __ lea(rax, Address(rbp,

       47                 frame::interpreter_frame_monitor_block_top_offset * wordSize));

       48     __ cmpptr(rax, rsp);  // rax, = maximal rsp for current rbp,

       49                         //  (stack grows negative)

       50     __ jcc(Assembler::aboveEqual, L); // check if frame is complete

       51     __ stop ("interpreter frame not set up");

       52     __ bind(L);

       53   }

       54 #endif // ASSERT

       55   // Restore bcp under the assumption that the current frame is still

       56   // interpreted

       57   __ restore_bcp();

       58 

       59   // expression stack must be empty before entering the VM if an exception

       60   // happened

       61   __ empty_expression_stack();

       62   __ empty_FPU_stack();

       63   // throw exception

       64   __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError));

       65   return entry;

       66 }

       67 

       68 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char* name) {

       69   address entry = __ pc();

       70   // expression stack must be empty before entering the VM if an exception happened

       71   __ empty_expression_stack();

       72   __ empty_FPU_stack();

       73   // setup parameters

       74   // ??? convention: expect aberrant index in register rbx,

       75   __ lea(rax, ExternalAddress((address)name));

       76   __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException), rax, rbx);

       77   return entry;

       78 }

       79 

       80 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {

       81   address entry = __ pc();

       82   // object is at TOS

       83   __ pop(rax);

       84   // expression stack must be empty before entering the VM if an exception

       85   // happened

       86   __ empty_expression_stack();

       87   __ empty_FPU_stack();

       88   __ call_VM(noreg,

       89              CAST_FROM_FN_PTR(address,

       90                               InterpreterRuntime::throw_ClassCastException),

       91              rax);

       92   return entry;

       93 }

       94 

       95 // Arguments are: required type at TOS+4, failing object (or NULL) at TOS.

       96 address TemplateInterpreterGenerator::generate_WrongMethodType_handler() {

       97   address entry = __ pc();

       98 

       99   __ pop(rbx);                  // actual failing object is at TOS

      100   __ pop(rax);                  // required type is at TOS+4

      101 

      102   __ verify_oop(rbx);

      103   __ verify_oop(rax);

      104 

      105   // Various method handle types use interpreter registers as temps.

      106   __ restore_bcp();

      107   __ restore_locals();

      108 

      109   // Expression stack must be empty before entering the VM for an exception.

      110   __ empty_expression_stack();

      111   __ empty_FPU_stack();

      112   __ call_VM(noreg,

      113              CAST_FROM_FN_PTR(address,

      114                               InterpreterRuntime::throw_WrongMethodTypeException),

      115              // pass required type, failing object (or NULL)

      116              rax, rbx);

      117   return entry;

      118 }

      119 

      120 

      121 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) {

      122   assert(!pass_oop || message == NULL, "either oop or message but not both");

      123   address entry = __ pc();

      124   if (pass_oop) {

      125     // object is at TOS

      126     __ pop(rbx);

      127   }

      128   // expression stack must be empty before entering the VM if an exception happened

      129   __ empty_expression_stack();

      130   __ empty_FPU_stack();

      131   // setup parameters

      132   __ lea(rax, ExternalAddress((address)name));

      133   if (pass_oop) {

      134     __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), rax, rbx);

      135   } else {

      136     if (message != NULL) {

      137       __ lea(rbx, ExternalAddress((address)message));

      138     } else {

      139       __ movptr(rbx, NULL_WORD);

      140     }

      141     __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), rax, rbx);

      142   }

      143   // throw exception

      144   __ jump(ExternalAddress(Interpreter::throw_exception_entry()));

      145   return entry;

      146 }

      147 

      148 

      149 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {

      150   address entry = __ pc();

      151   // NULL last_sp until next java call

      152   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);

      153   __ dispatch_next(state);

      154   return entry;

      155 }

      156 

      157 

      158 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step) {

      159   TosState incoming_state = state;

      160 

      161   Label interpreter_entry;

      162   address compiled_entry = __ pc();

      163 

      164 #ifdef COMPILER2

      165   // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases

      166   if ((incoming_state == ftos && UseSSE < 1) || (incoming_state == dtos && UseSSE < 2)) {

      167     for (int i = 1; i < 8; i++) {

      168         __ ffree(i);

      169     }

      170   } else if (UseSSE < 2) {

      171     __ empty_FPU_stack();

      172   }

      173 #endif

      174   if ((incoming_state == ftos && UseSSE < 1) || (incoming_state == dtos && UseSSE < 2)) {

      175     __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");

      176   } else {

      177     __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");

      178   }

      179 

      180   __ jmp(interpreter_entry, relocInfo::none);

      181   // emit a sentinel we can test for when converting an interpreter

      182   // entry point to a compiled entry point.

      183   __ a_long(Interpreter::return_sentinel);

      184   __ a_long((int)compiled_entry);

      185   address entry = __ pc();

      186   __ bind(interpreter_entry);

      187 

      188   // In SSE mode, interpreter returns FP results in xmm0 but they need

      189   // to end up back on the FPU so it can operate on them.

      190   if (incoming_state == ftos && UseSSE >= 1) {

      191     __ subptr(rsp, wordSize);

      192     __ movflt(Address(rsp, 0), xmm0);

      193     __ fld_s(Address(rsp, 0));

      194     __ addptr(rsp, wordSize);

      195   } else if (incoming_state == dtos && UseSSE >= 2) {

      196     __ subptr(rsp, 2*wordSize);

      197     __ movdbl(Address(rsp, 0), xmm0);

      198     __ fld_d(Address(rsp, 0));

      199     __ addptr(rsp, 2*wordSize);

      200   }

      201 

      202   __ MacroAssembler::verify_FPU(state == ftos || state == dtos ? 1 : 0, "generate_return_entry_for in interpreter");

      203 

      204   // Restore stack bottom in case i2c adjusted stack

      205   __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));

      206   // and NULL it as marker that rsp is now tos until next java call

      207   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);

      208 

      209   __ restore_bcp();

      210   __ restore_locals();

      211 

      212   Label L_got_cache, L_giant_index;

      213   if (EnableInvokeDynamic) {

      214     __ cmpb(Address(rsi, 0), Bytecodes::_invokedynamic);

      215     __ jcc(Assembler::equal, L_giant_index);

      216   }

      217   __ get_cache_and_index_at_bcp(rbx, rcx, 1, false);

      218   __ bind(L_got_cache);

      219   __ movl(rbx, Address(rbx, rcx,

      220                     Address::times_ptr, constantPoolCacheOopDesc::base_offset() +

      221                     ConstantPoolCacheEntry::flags_offset()));

      222   __ andptr(rbx, 0xFF);

      223   __ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale()));

      224   __ dispatch_next(state, step);

      225 

      226   // out of the main line of code...

      227   if (EnableInvokeDynamic) {

      228     __ bind(L_giant_index);

      229     __ get_cache_and_index_at_bcp(rbx, rcx, 1, true);

      230     __ jmp(L_got_cache);

      231   }

      232 

      233   return entry;

      234 }

      235 

      236 

      237 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) {

      238   address entry = __ pc();

      239 

      240   // In SSE mode, FP results are in xmm0

      241   if (state == ftos && UseSSE > 0) {

      242     __ subptr(rsp, wordSize);

      243     __ movflt(Address(rsp, 0), xmm0);

      244     __ fld_s(Address(rsp, 0));

      245     __ addptr(rsp, wordSize);

      246   } else if (state == dtos && UseSSE >= 2) {

      247     __ subptr(rsp, 2*wordSize);

      248     __ movdbl(Address(rsp, 0), xmm0);

      249     __ fld_d(Address(rsp, 0));

      250     __ addptr(rsp, 2*wordSize);

      251   }

      252 

      253   __ MacroAssembler::verify_FPU(state == ftos || state == dtos ? 1 : 0, "generate_deopt_entry_for in interpreter");

      254 

      255   // The stack is not extended by deopt but we must NULL last_sp as this

      256   // entry is like a "return".

      257   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);

      258   __ restore_bcp();

      259   __ restore_locals();

      260   // handle exceptions

      261   { Label L;

      262     const Register thread = rcx;

      263     __ get_thread(thread);

      264     __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);

      265     __ jcc(Assembler::zero, L);

      266     __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));

      267     __ should_not_reach_here();

      268     __ bind(L);

      269   }

      270   __ dispatch_next(state, step);

      271   return entry;

      272 }

      273 

      274 

      275 int AbstractInterpreter::BasicType_as_index(BasicType type) {

      276   int i = 0;

      277   switch (type) {

      278     case T_BOOLEAN: i = 0; break;

      279     case T_CHAR   : i = 1; break;

      280     case T_BYTE   : i = 2; break;

      281     case T_SHORT  : i = 3; break;

      282     case T_INT    : // fall through

      283     case T_LONG   : // fall through

      284     case T_VOID   : i = 4; break;

      285     case T_FLOAT  : i = 5; break;  // have to treat float and double separately for SSE

      286     case T_DOUBLE : i = 6; break;

      287     case T_OBJECT : // fall through

      288     case T_ARRAY  : i = 7; break;

      289     default       : ShouldNotReachHere();

      290   }

      291   assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds");

      292   return i;

      293 }

      294 

      295 

      296 address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) {

      297   address entry = __ pc();

      298   switch (type) {

      299     case T_BOOLEAN: __ c2bool(rax);            break;

      300     case T_CHAR   : __ andptr(rax, 0xFFFF);    break;

      301     case T_BYTE   : __ sign_extend_byte (rax); break;

      302     case T_SHORT  : __ sign_extend_short(rax); break;

      303     case T_INT    : /* nothing to do */        break;

      304     case T_DOUBLE :

      305     case T_FLOAT  :

      306       { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();

      307         __ pop(t);                            // remove return address first

      308         __ pop_dtos_to_rsp();

      309         // Must return a result for interpreter or compiler. In SSE

      310         // mode, results are returned in xmm0 and the FPU stack must

      311         // be empty.

      312         if (type == T_FLOAT && UseSSE >= 1) {

      313           // Load ST0

      314           __ fld_d(Address(rsp, 0));

      315           // Store as float and empty fpu stack

      316           __ fstp_s(Address(rsp, 0));

      317           // and reload

      318           __ movflt(xmm0, Address(rsp, 0));

      319         } else if (type == T_DOUBLE && UseSSE >= 2 ) {

      320           __ movdbl(xmm0, Address(rsp, 0));

      321         } else {

      322           // restore ST0

      323           __ fld_d(Address(rsp, 0));

      324         }

      325         // and pop the temp

      326         __ addptr(rsp, 2 * wordSize);

      327         __ push(t);                           // restore return address

      328       }

      329       break;

      330     case T_OBJECT :

      331       // retrieve result from frame

      332       __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));

      333       // and verify it

      334       __ verify_oop(rax);

      335       break;

      336     default       : ShouldNotReachHere();

      337   }

      338   __ ret(0);                                   // return from result handler

      339   return entry;

      340 }

      341 

      342 address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) {

      343   address entry = __ pc();

      344   __ push(state);

      345   __ call_VM(noreg, runtime_entry);

      346   __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));

      347   return entry;

      348 }

      349 

      350 

      351 // Helpers for commoning out cases in the various type of method entries.

      352 //

      353 

      354 // increment invocation count & check for overflow

      355 //

      356 // Note: checking for negative value instead of overflow

      357 //       so we have a 'sticky' overflow test

      358 //

      359 // rbx,: method

      360 // rcx: invocation counter

      361 //

      362 void InterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) {

      363 

      364   const Address invocation_counter(rbx, methodOopDesc::invocation_counter_offset() + InvocationCounter::counter_offset());

      365   const Address backedge_counter  (rbx, methodOopDesc::backedge_counter_offset() + InvocationCounter::counter_offset());

      366 

      367   if (ProfileInterpreter) { // %%% Merge this into methodDataOop

      368     __ incrementl(Address(rbx,methodOopDesc::interpreter_invocation_counter_offset()));

      369   }

      370   // Update standard invocation counters

      371   __ movl(rax, backedge_counter);               // load backedge counter

      372 

      373   __ incrementl(rcx, InvocationCounter::count_increment);

      374   __ andl(rax, InvocationCounter::count_mask_value);  // mask out the status bits

      375 

      376   __ movl(invocation_counter, rcx);             // save invocation count

      377   __ addl(rcx, rax);                            // add both counters

      378 

      379   // profile_method is non-null only for interpreted method so

      380   // profile_method != NULL == !native_call

      381   // BytecodeInterpreter only calls for native so code is elided.

      382 

      383   if (ProfileInterpreter && profile_method != NULL) {

      384     // Test to see if we should create a method data oop

      385     __ cmp32(rcx,

      386              ExternalAddress((address)&InvocationCounter::InterpreterProfileLimit));

      387     __ jcc(Assembler::less, *profile_method_continue);

      388 

      389     // if no method data exists, go to profile_method

      390     __ test_method_data_pointer(rax, *profile_method);

      391   }

      392 

      393   __ cmp32(rcx,

      394            ExternalAddress((address)&InvocationCounter::InterpreterInvocationLimit));

      395   __ jcc(Assembler::aboveEqual, *overflow);

      396 

      397 }

      398 

      399 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {

      400 

      401   // Asm interpreter on entry

      402   // rdi - locals

      403   // rsi - bcp

      404   // rbx, - method

      405   // rdx - cpool

      406   // rbp, - interpreter frame

      407 

      408   // C++ interpreter on entry

      409   // rsi - new interpreter state pointer

      410   // rbp - interpreter frame pointer

      411   // rbx - method

      412 

      413   // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]

      414   // rbx, - method

      415   // rcx - rcvr (assuming there is one)

      416   // top of stack return address of interpreter caller

      417   // rsp - sender_sp

      418 

      419   // C++ interpreter only

      420   // rsi - previous interpreter state pointer

      421 

      422   const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset());

      423 

      424   // InterpreterRuntime::frequency_counter_overflow takes one argument

      425   // indicating if the counter overflow occurs at a backwards branch (non-NULL bcp).

      426   // The call returns the address of the verified entry point for the method or NULL

      427   // if the compilation did not complete (either went background or bailed out).

      428   __ movptr(rax, (intptr_t)false);

      429   __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), rax);

      430 

      431   __ movptr(rbx, Address(rbp, method_offset));   // restore methodOop

      432 

      433   // Preserve invariant that rsi/rdi contain bcp/locals of sender frame

      434   // and jump to the interpreted entry.

      435   __ jmp(*do_continue, relocInfo::none);

      436 

      437 }

      438 

      439 void InterpreterGenerator::generate_stack_overflow_check(void) {

      440   // see if we've got enough room on the stack for locals plus overhead.

      441   // the expression stack grows down incrementally, so the normal guard

      442   // page mechanism will work for that.

      443   //

      444   // Registers live on entry:

      445   //

      446   // Asm interpreter

      447   // rdx: number of additional locals this frame needs (what we must check)

      448   // rbx,: methodOop

      449 

      450   // destroyed on exit

      451   // rax,

      452 

      453   // NOTE:  since the additional locals are also always pushed (wasn't obvious in

      454   // generate_method_entry) so the guard should work for them too.

      455   //

      456 

      457   // monitor entry size: see picture of stack set (generate_method_entry) and frame_x86.hpp

      458   const int entry_size    = frame::interpreter_frame_monitor_size() * wordSize;

      459 

      460   // total overhead size: entry_size + (saved rbp, thru expr stack bottom).

      461   // be sure to change this if you add/subtract anything to/from the overhead area

      462   const int overhead_size = -(frame::interpreter_frame_initial_sp_offset*wordSize) + entry_size;

      463 

      464   const int page_size = os::vm_page_size();

      465 

      466   Label after_frame_check;

      467 

      468   // see if the frame is greater than one page in size. If so,

      469   // then we need to verify there is enough stack space remaining

      470   // for the additional locals.

      471   __ cmpl(rdx, (page_size - overhead_size)/Interpreter::stackElementSize());

      472   __ jcc(Assembler::belowEqual, after_frame_check);

      473 

      474   // compute rsp as if this were going to be the last frame on

      475   // the stack before the red zone

      476 

      477   Label after_frame_check_pop;

      478 

      479   __ push(rsi);

      480 

      481   const Register thread = rsi;

      482 

      483   __ get_thread(thread);

      484 

      485   const Address stack_base(thread, Thread::stack_base_offset());

      486   const Address stack_size(thread, Thread::stack_size_offset());

      487 

      488   // locals + overhead, in bytes

      489   __ lea(rax, Address(noreg, rdx, Interpreter::stackElementScale(), overhead_size));

      490 

      491 #ifdef ASSERT

      492   Label stack_base_okay, stack_size_okay;

      493   // verify that thread stack base is non-zero

      494   __ cmpptr(stack_base, (int32_t)NULL_WORD);

      495   __ jcc(Assembler::notEqual, stack_base_okay);

      496   __ stop("stack base is zero");

      497   __ bind(stack_base_okay);

      498   // verify that thread stack size is non-zero

      499   __ cmpptr(stack_size, 0);

      500   __ jcc(Assembler::notEqual, stack_size_okay);

      501   __ stop("stack size is zero");

      502   __ bind(stack_size_okay);

      503 #endif

      504 

      505   // Add stack base to locals and subtract stack size

      506   __ addptr(rax, stack_base);

      507   __ subptr(rax, stack_size);

      508 

      509   // Use the maximum number of pages we might bang.

      510   const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages :

      511                                                                               (StackRedPages+StackYellowPages);

      512   __ addptr(rax, max_pages * page_size);

      513 

      514   // check against the current stack bottom

      515   __ cmpptr(rsp, rax);

      516   __ jcc(Assembler::above, after_frame_check_pop);

      517 

      518   __ pop(rsi);  // get saved bcp / (c++ prev state ).

      519 

      520   __ pop(rax);  // get return address

      521   __ jump(ExternalAddress(Interpreter::throw_StackOverflowError_entry()));

      522 

      523   // all done with frame size check

      524   __ bind(after_frame_check_pop);

      525   __ pop(rsi);

      526 

      527   __ bind(after_frame_check);

      528 }

      529 

      530 // Allocate monitor and lock method (asm interpreter)

      531 // rbx, - methodOop

      532 //

      533 void InterpreterGenerator::lock_method(void) {

      534   // synchronize method

      535   const Address access_flags      (rbx, methodOopDesc::access_flags_offset());

      536   const Address monitor_block_top (rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);

      537   const int entry_size            = frame::interpreter_frame_monitor_size() * wordSize;

      538 

      539   #ifdef ASSERT

      540     { Label L;

      541       __ movl(rax, access_flags);

      542       __ testl(rax, JVM_ACC_SYNCHRONIZED);

      543       __ jcc(Assembler::notZero, L);

      544       __ stop("method doesn't need synchronization");

      545       __ bind(L);

      546     }

      547   #endif // ASSERT

      548   // get synchronization object

      549   { Label done;

      550     const int mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();

      551     __ movl(rax, access_flags);

      552     __ testl(rax, JVM_ACC_STATIC);

      553     __ movptr(rax, Address(rdi, Interpreter::local_offset_in_bytes(0)));  // get receiver (assume this is frequent case)

      554     __ jcc(Assembler::zero, done);

      555     __ movptr(rax, Address(rbx, methodOopDesc::constants_offset()));

      556     __ movptr(rax, Address(rax, constantPoolOopDesc::pool_holder_offset_in_bytes()));

      557     __ movptr(rax, Address(rax, mirror_offset));

      558     __ bind(done);

      559   }

      560   // add space for monitor & lock

      561   __ subptr(rsp, entry_size);                                           // add space for a monitor entry

      562   __ movptr(monitor_block_top, rsp);                                    // set new monitor block top

      563   __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); // store object

      564   __ mov(rdx, rsp);                                                    // object address

      565   __ lock_object(rdx);

      566 }

      567 

      568 //

      569 // Generate a fixed interpreter frame. This is identical setup for interpreted methods

      570 // and for native methods hence the shared code.

      571 

      572 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {

      573   // initialize fixed part of activation frame

      574   __ push(rax);                                       // save return address

      575   __ enter();                                         // save old & set new rbp,

      576 

      577 

      578   __ push(rsi);                                       // set sender sp

      579   __ push((int32_t)NULL_WORD);                        // leave last_sp as null

      580   __ movptr(rsi, Address(rbx,methodOopDesc::const_offset())); // get constMethodOop

      581   __ lea(rsi, Address(rsi,constMethodOopDesc::codes_offset())); // get codebase

      582   __ push(rbx);                                      // save methodOop

      583   if (ProfileInterpreter) {

      584     Label method_data_continue;

      585     __ movptr(rdx, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));

      586     __ testptr(rdx, rdx);

      587     __ jcc(Assembler::zero, method_data_continue);

      588     __ addptr(rdx, in_bytes(methodDataOopDesc::data_offset()));

      589     __ bind(method_data_continue);

      590     __ push(rdx);                                       // set the mdp (method data pointer)

      591   } else {

      592     __ push(0);

      593   }

      594 

      595   __ movptr(rdx, Address(rbx, methodOopDesc::constants_offset()));

      596   __ movptr(rdx, Address(rdx, constantPoolOopDesc::cache_offset_in_bytes()));

      597   __ push(rdx);                                       // set constant pool cache

      598   __ push(rdi);                                       // set locals pointer

      599   if (native_call) {

      600     __ push(0);                                       // no bcp

      601   } else {

      602     __ push(rsi);                                     // set bcp

      603     }

      604   __ push(0);                                         // reserve word for pointer to expression stack bottom

      605   __ movptr(Address(rsp, 0), rsp);                    // set expression stack bottom

      606 }

      607 

      608 // End of helpers

      609 

      610 //

      611 // Various method entries

      612 //------------------------------------------------------------------------------------------------------------------------

      613 //

      614 //

      615 

      616 // Call an accessor method (assuming it is resolved, otherwise drop into vanilla (slow path) entry

      617 

      618 address InterpreterGenerator::generate_accessor_entry(void) {

      619 

      620   // rbx,: methodOop

      621   // rcx: receiver (preserve for slow entry into asm interpreter)

      622 

      623   // rsi: senderSP must preserved for slow path, set SP to it on fast path

      624 

      625   address entry_point = __ pc();

      626   Label xreturn_path;

      627 

      628   // do fastpath for resolved accessor methods

      629   if (UseFastAccessorMethods) {

      630     Label slow_path;

      631     // If we need a safepoint check, generate full interpreter entry.

      632     ExternalAddress state(SafepointSynchronize::address_of_state());

      633     __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),

      634              SafepointSynchronize::_not_synchronized);

      635 

      636     __ jcc(Assembler::notEqual, slow_path);

      637     // ASM/C++ Interpreter

      638     // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites thereof; parameter size = 1

      639     // Note: We can only use this code if the getfield has been resolved

      640     //       and if we don't have a null-pointer exception => check for

      641     //       these conditions first and use slow path if necessary.

      642     // rbx,: method

      643     // rcx: receiver

      644     __ movptr(rax, Address(rsp, wordSize));

      645 

      646     // check if local 0 != NULL and read field

      647     __ testptr(rax, rax);

      648     __ jcc(Assembler::zero, slow_path);

      649 

      650     __ movptr(rdi, Address(rbx, methodOopDesc::constants_offset()));

      651     // read first instruction word and extract bytecode @ 1 and index @ 2

      652     __ movptr(rdx, Address(rbx, methodOopDesc::const_offset()));

      653     __ movl(rdx, Address(rdx, constMethodOopDesc::codes_offset()));

      654     // Shift codes right to get the index on the right.

      655     // The bytecode fetched looks like <index><0xb4><0x2a>

      656     __ shrl(rdx, 2*BitsPerByte);

      657     __ shll(rdx, exact_log2(in_words(ConstantPoolCacheEntry::size())));

      658     __ movptr(rdi, Address(rdi, constantPoolOopDesc::cache_offset_in_bytes()));

      659 

      660     // rax,: local 0

      661     // rbx,: method

      662     // rcx: receiver - do not destroy since it is needed for slow path!

      663     // rcx: scratch

      664     // rdx: constant pool cache index

      665     // rdi: constant pool cache

      666     // rsi: sender sp

      667 

      668     // check if getfield has been resolved and read constant pool cache entry

      669     // check the validity of the cache entry by testing whether _indices field

      670     // contains Bytecode::_getfield in b1 byte.

      671     assert(in_words(ConstantPoolCacheEntry::size()) == 4, "adjust shift below");

      672     __ movl(rcx,

      673             Address(rdi,

      674                     rdx,

      675                     Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::indices_offset()));

      676     __ shrl(rcx, 2*BitsPerByte);

      677     __ andl(rcx, 0xFF);

      678     __ cmpl(rcx, Bytecodes::_getfield);

      679     __ jcc(Assembler::notEqual, slow_path);

      680 

      681     // Note: constant pool entry is not valid before bytecode is resolved

      682     __ movptr(rcx,

      683               Address(rdi,

      684                       rdx,

      685                       Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::f2_offset()));

      686     __ movl(rdx,

      687             Address(rdi,

      688                     rdx,

      689                     Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::flags_offset()));

      690 

      691     Label notByte, notShort, notChar;

      692     const Address field_address (rax, rcx, Address::times_1);

      693 

      694     // Need to differentiate between igetfield, agetfield, bgetfield etc.

      695     // because they are different sizes.

      696     // Use the type from the constant pool cache

      697     __ shrl(rdx, ConstantPoolCacheEntry::tosBits);

      698     // Make sure we don't need to mask rdx for tosBits after the above shift

      699     ConstantPoolCacheEntry::verify_tosBits();

      700     __ cmpl(rdx, btos);

      701     __ jcc(Assembler::notEqual, notByte);

      702     __ load_signed_byte(rax, field_address);

      703     __ jmp(xreturn_path);

      704 

      705     __ bind(notByte);

      706     __ cmpl(rdx, stos);

      707     __ jcc(Assembler::notEqual, notShort);

      708     __ load_signed_short(rax, field_address);

      709     __ jmp(xreturn_path);

      710 

      711     __ bind(notShort);

      712     __ cmpl(rdx, ctos);

      713     __ jcc(Assembler::notEqual, notChar);

      714     __ load_unsigned_short(rax, field_address);

      715     __ jmp(xreturn_path);

      716 

      717     __ bind(notChar);

      718 #ifdef ASSERT

      719     Label okay;

      720     __ cmpl(rdx, atos);

      721     __ jcc(Assembler::equal, okay);

      722     __ cmpl(rdx, itos);

      723     __ jcc(Assembler::equal, okay);

      724     __ stop("what type is this?");

      725     __ bind(okay);

      726 #endif // ASSERT

      727     // All the rest are a 32 bit wordsize

      728     // This is ok for now. Since fast accessors should be going away

      729     __ movptr(rax, field_address);

      730 

      731     __ bind(xreturn_path);

      732 

      733     // _ireturn/_areturn

      734     __ pop(rdi);                               // get return address

      735     __ mov(rsp, rsi);                          // set sp to sender sp

      736     __ jmp(rdi);

      737 

      738     // generate a vanilla interpreter entry as the slow path

      739     __ bind(slow_path);

      740 

      741     (void) generate_normal_entry(false);

      742     return entry_point;

      743   }

      744   return NULL;

      745 

      746 }

      747 

      748 //

      749 // Interpreter stub for calling a native method. (asm interpreter)

      750 // This sets up a somewhat different looking stack for calling the native method

      751 // than the typical interpreter frame setup.

      752 //

      753 

      754 address InterpreterGenerator::generate_native_entry(bool synchronized) {

      755   // determine code generation flags

      756   bool inc_counter  = UseCompiler || CountCompiledCalls;

      757 

      758   // rbx,: methodOop

      759   // rsi: sender sp

      760   // rsi: previous interpreter state (C++ interpreter) must preserve

      761   address entry_point = __ pc();

      762 

      763 

      764   const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset());

      765   const Address invocation_counter(rbx, methodOopDesc::invocation_counter_offset() + InvocationCounter::counter_offset());

      766   const Address access_flags      (rbx, methodOopDesc::access_flags_offset());

      767 

      768   // get parameter size (always needed)

      769   __ load_unsigned_short(rcx, size_of_parameters);

      770 

      771   // native calls don't need the stack size check since they have no expression stack

      772   // and the arguments are already on the stack and we only add a handful of words

      773   // to the stack

      774 

      775   // rbx,: methodOop

      776   // rcx: size of parameters

      777   // rsi: sender sp

      778 

      779   __ pop(rax);                                       // get return address

      780   // for natives the size of locals is zero

      781 

      782   // compute beginning of parameters (rdi)

      783   __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));

      784 

      785 

      786   // add 2 zero-initialized slots for native calls

      787   // NULL result handler

      788   __ push((int32_t)NULL_WORD);

      789   // NULL oop temp (mirror or jni oop result)

      790   __ push((int32_t)NULL_WORD);

      791 

      792   if (inc_counter) __ movl(rcx, invocation_counter);  // (pre-)fetch invocation count

      793   // initialize fixed part of activation frame

      794 

      795   generate_fixed_frame(true);

      796 

      797   // make sure method is native & not abstract

      798 #ifdef ASSERT

      799   __ movl(rax, access_flags);

      800   {

      801     Label L;

      802     __ testl(rax, JVM_ACC_NATIVE);

      803     __ jcc(Assembler::notZero, L);

      804     __ stop("tried to execute non-native method as native");

      805     __ bind(L);

      806   }

      807   { Label L;

      808     __ testl(rax, JVM_ACC_ABSTRACT);

      809     __ jcc(Assembler::zero, L);

      810     __ stop("tried to execute abstract method in interpreter");

      811     __ bind(L);

      812   }

      813 #endif

      814 

      815   // Since at this point in the method invocation the exception handler

      816   // would try to exit the monitor of synchronized methods which hasn't

      817   // been entered yet, we set the thread local variable

      818   // _do_not_unlock_if_synchronized to true. The remove_activation will

      819   // check this flag.

      820 

      821   __ get_thread(rax);

      822   const Address do_not_unlock_if_synchronized(rax,

      823         in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));

      824   __ movbool(do_not_unlock_if_synchronized, true);

      825 

      826   // increment invocation count & check for overflow

      827   Label invocation_counter_overflow;

      828   if (inc_counter) {

      829     generate_counter_incr(&invocation_counter_overflow, NULL, NULL);

      830   }

      831 

      832   Label continue_after_compile;

      833   __ bind(continue_after_compile);

      834 

      835   bang_stack_shadow_pages(true);

      836 

      837   // reset the _do_not_unlock_if_synchronized flag

      838   __ get_thread(rax);

      839   __ movbool(do_not_unlock_if_synchronized, false);

      840 

      841   // check for synchronized methods

      842   // Must happen AFTER invocation_counter check and stack overflow check,

      843   // so method is not locked if overflows.

      844   //

      845   if (synchronized) {

      846     lock_method();

      847   } else {

      848     // no synchronization necessary

      849 #ifdef ASSERT

      850       { Label L;

      851         __ movl(rax, access_flags);

      852         __ testl(rax, JVM_ACC_SYNCHRONIZED);

      853         __ jcc(Assembler::zero, L);

      854         __ stop("method needs synchronization");

      855         __ bind(L);

      856       }

      857 #endif

      858   }

      859 

      860   // start execution

      861 #ifdef ASSERT

      862   { Label L;

      863     const Address monitor_block_top (rbp,

      864                  frame::interpreter_frame_monitor_block_top_offset * wordSize);

      865     __ movptr(rax, monitor_block_top);

      866     __ cmpptr(rax, rsp);

      867     __ jcc(Assembler::equal, L);

      868     __ stop("broken stack frame setup in interpreter");

      869     __ bind(L);

      870   }

      871 #endif

      872 

      873   // jvmti/dtrace support

      874   __ notify_method_entry();

      875 

      876   // work registers

      877   const Register method = rbx;

      878   const Register thread = rdi;

      879   const Register t      = rcx;

      880 

      881   // allocate space for parameters

      882   __ get_method(method);

      883   __ verify_oop(method);

      884   __ load_unsigned_short(t, Address(method, methodOopDesc::size_of_parameters_offset()));

      885   __ shlptr(t, Interpreter::logStackElementSize());

      886   __ addptr(t, 2*wordSize);     // allocate two more slots for JNIEnv and possible mirror

      887   __ subptr(rsp, t);

      888   __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics

      889 

      890   // get signature handler

      891   { Label L;

      892     __ movptr(t, Address(method, methodOopDesc::signature_handler_offset()));

      893     __ testptr(t, t);

      894     __ jcc(Assembler::notZero, L);

      895     __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);

      896     __ get_method(method);

      897     __ movptr(t, Address(method, methodOopDesc::signature_handler_offset()));

      898     __ bind(L);

      899   }

      900 

      901   // call signature handler

      902   assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rdi, "adjust this code");

      903   assert(InterpreterRuntime::SignatureHandlerGenerator::to  () == rsp, "adjust this code");

      904   assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == t  , "adjust this code");

      905   // The generated handlers do not touch RBX (the method oop).

      906   // However, large signatures cannot be cached and are generated

      907   // each time here.  The slow-path generator will blow RBX

      908   // sometime, so we must reload it after the call.

      909   __ call(t);

      910   __ get_method(method);        // slow path call blows RBX on DevStudio 5.0

      911 

      912   // result handler is in rax,

      913   // set result handler

      914   __ movptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize), rax);

      915 

      916   // pass mirror handle if static call

      917   { Label L;

      918     const int mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();

      919     __ movl(t, Address(method, methodOopDesc::access_flags_offset()));

      920     __ testl(t, JVM_ACC_STATIC);

      921     __ jcc(Assembler::zero, L);

      922     // get mirror

      923     __ movptr(t, Address(method, methodOopDesc:: constants_offset()));

      924     __ movptr(t, Address(t, constantPoolOopDesc::pool_holder_offset_in_bytes()));

      925     __ movptr(t, Address(t, mirror_offset));

      926     // copy mirror into activation frame

      927     __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), t);

      928     // pass handle to mirror

      929     __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));

      930     __ movptr(Address(rsp, wordSize), t);

      931     __ bind(L);

      932   }

      933 

      934   // get native function entry point

      935   { Label L;

      936     __ movptr(rax, Address(method, methodOopDesc::native_function_offset()));

      937     ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());

      938     __ cmpptr(rax, unsatisfied.addr());

      939     __ jcc(Assembler::notEqual, L);

      940     __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);

      941     __ get_method(method);

      942     __ verify_oop(method);

      943     __ movptr(rax, Address(method, methodOopDesc::native_function_offset()));

      944     __ bind(L);

      945   }

      946 

      947   // pass JNIEnv

      948   __ get_thread(thread);

      949   __ lea(t, Address(thread, JavaThread::jni_environment_offset()));

      950   __ movptr(Address(rsp, 0), t);

      951 

      952   // set_last_Java_frame_before_call

      953   // It is enough that the pc()

      954   // points into the right code segment. It does not have to be the correct return pc.

      955   __ set_last_Java_frame(thread, noreg, rbp, __ pc());

      956 

      957   // change thread state

      958 #ifdef ASSERT

      959   { Label L;

      960     __ movl(t, Address(thread, JavaThread::thread_state_offset()));

      961     __ cmpl(t, _thread_in_Java);

      962     __ jcc(Assembler::equal, L);

      963     __ stop("Wrong thread state in native stub");

      964     __ bind(L);

      965   }

      966 #endif

      967 

      968   // Change state to native

      969   __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native);

      970   __ call(rax);

      971 

      972   // result potentially in rdx:rax or ST0

      973 

      974   // Either restore the MXCSR register after returning from the JNI Call

      975   // or verify that it wasn't changed.

      976   if (VM_Version::supports_sse()) {

      977     if (RestoreMXCSROnJNICalls) {

      978       __ ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std()));

      979     }

      980     else if (CheckJNICalls ) {

      981       __ call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry()));

      982     }

      983   }

      984 

      985   // Either restore the x87 floating pointer control word after returning

      986   // from the JNI call or verify that it wasn't changed.

      987   if (CheckJNICalls) {

      988     __ call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry()));

      989   }

      990 

      991   // save potential result in ST(0) & rdx:rax

      992   // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -

      993   // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)

      994   // It is safe to do this push because state is _thread_in_native and return address will be found

      995   // via _last_native_pc and not via _last_jave_sp

      996 

      997   // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.

      998   // If the order changes or anything else is added to the stack the code in

      999   // interpreter_frame_result will have to be changed.

     1000 

     1001   { Label L;

     1002     Label push_double;

     1003     ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));

     1004     ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));

     1005     __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),

     1006               float_handler.addr());

     1007     __ jcc(Assembler::equal, push_double);

     1008     __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),

     1009               double_handler.addr());

     1010     __ jcc(Assembler::notEqual, L);

     1011     __ bind(push_double);

     1012     __ push(dtos);

     1013     __ bind(L);

     1014   }

     1015   __ push(ltos);

     1016 

     1017   // change thread state

     1018   __ get_thread(thread);

     1019   __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native_trans);

     1020   if(os::is_MP()) {

     1021     if (UseMembar) {

     1022       // Force this write out before the read below

     1023       __ membar(Assembler::Membar_mask_bits(

     1024            Assembler::LoadLoad | Assembler::LoadStore |

     1025            Assembler::StoreLoad | Assembler::StoreStore));

     1026     } else {

     1027       // Write serialization page so VM thread can do a pseudo remote membar.

     1028       // We use the current thread pointer to calculate a thread specific

     1029       // offset to write to within the page. This minimizes bus traffic

     1030       // due to cache line collision.

     1031       __ serialize_memory(thread, rcx);

     1032     }

     1033   }

     1034 

     1035   if (AlwaysRestoreFPU) {

     1036     //  Make sure the control word is correct.

     1037     __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));

     1038   }

     1039 

     1040   // check for safepoint operation in progress and/or pending suspend requests

     1041   { Label Continue;

     1042 

     1043     __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),

     1044              SafepointSynchronize::_not_synchronized);

     1045 

     1046     Label L;

     1047     __ jcc(Assembler::notEqual, L);

     1048     __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);

     1049     __ jcc(Assembler::equal, Continue);

     1050     __ bind(L);

     1051 

     1052     // Don't use call_VM as it will see a possible pending exception and forward it

     1053     // and never return here preventing us from clearing _last_native_pc down below.

     1054     // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are

     1055     // preserved and correspond to the bcp/locals pointers. So we do a runtime call

     1056     // by hand.

     1057     //

     1058     __ push(thread);

     1059     __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,

     1060                                             JavaThread::check_special_condition_for_native_trans)));

     1061     __ increment(rsp, wordSize);

     1062     __ get_thread(thread);

     1063 

     1064     __ bind(Continue);

     1065   }

     1066 

     1067   // change thread state

     1068   __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);

     1069 

     1070   __ reset_last_Java_frame(thread, true, true);

     1071 

     1072   // reset handle block

     1073   __ movptr(t, Address(thread, JavaThread::active_handles_offset()));

     1074   __ movptr(Address(t, JNIHandleBlock::top_offset_in_bytes()), NULL_WORD);

     1075 

     1076   // If result was an oop then unbox and save it in the frame

     1077   { Label L;

     1078     Label no_oop, store_result;

     1079     ExternalAddress handler(AbstractInterpreter::result_handler(T_OBJECT));

     1080     __ cmpptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize),

     1081               handler.addr());

     1082     __ jcc(Assembler::notEqual, no_oop);

     1083     __ cmpptr(Address(rsp, 0), (int32_t)NULL_WORD);

     1084     __ pop(ltos);

     1085     __ testptr(rax, rax);

     1086     __ jcc(Assembler::zero, store_result);

     1087     // unbox

     1088     __ movptr(rax, Address(rax, 0));

     1089     __ bind(store_result);

     1090     __ movptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset)*wordSize), rax);

     1091     // keep stack depth as expected by pushing oop which will eventually be discarded

     1092     __ push(ltos);

     1093     __ bind(no_oop);

     1094   }

     1095 

     1096   {

     1097      Label no_reguard;

     1098      __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled);

     1099      __ jcc(Assembler::notEqual, no_reguard);

     1100 

     1101      __ pusha();

     1102      __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));

     1103      __ popa();

     1104 

     1105      __ bind(no_reguard);

     1106    }

     1107 

     1108   // restore rsi to have legal interpreter frame,

     1109   // i.e., bci == 0 <=> rsi == code_base()

     1110   // Can't call_VM until bcp is within reasonable.

     1111   __ get_method(method);      // method is junk from thread_in_native to now.

     1112   __ verify_oop(method);

     1113   __ movptr(rsi, Address(method,methodOopDesc::const_offset()));   // get constMethodOop

     1114   __ lea(rsi, Address(rsi,constMethodOopDesc::codes_offset()));    // get codebase

     1115 

     1116   // handle exceptions (exception handling will handle unlocking!)

     1117   { Label L;

     1118     __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);

     1119     __ jcc(Assembler::zero, L);

     1120     // Note: At some point we may want to unify this with the code used in call_VM_base();

     1121     //       i.e., we should use the StubRoutines::forward_exception code. For now this

     1122     //       doesn't work here because the rsp is not correctly set at this point.

     1123     __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));

     1124     __ should_not_reach_here();

     1125     __ bind(L);

     1126   }

     1127 

     1128   // do unlocking if necessary

     1129   { Label L;

     1130     __ movl(t, Address(method, methodOopDesc::access_flags_offset()));

     1131     __ testl(t, JVM_ACC_SYNCHRONIZED);

     1132     __ jcc(Assembler::zero, L);

     1133     // the code below should be shared with interpreter macro assembler implementation

     1134     { Label unlock;

     1135       // BasicObjectLock will be first in list, since this is a synchronized method. However, need

     1136       // to check that the object has not been unlocked by an explicit monitorexit bytecode.

     1137       const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));

     1138 

     1139       __ lea(rdx, monitor);                   // address of first monitor

     1140 

     1141       __ movptr(t, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));

     1142       __ testptr(t, t);

     1143       __ jcc(Assembler::notZero, unlock);

     1144 

     1145       // Entry already unlocked, need to throw exception

     1146       __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));

     1147       __ should_not_reach_here();

     1148 

     1149       __ bind(unlock);

     1150       __ unlock_object(rdx);

     1151     }

     1152     __ bind(L);

     1153   }

     1154 

     1155   // jvmti/dtrace support

     1156   // Note: This must happen _after_ handling/throwing any exceptions since

     1157   //       the exception handler code notifies the runtime of method exits

     1158   //       too. If this happens before, method entry/exit notifications are

     1159   //       not properly paired (was bug - gri 11/22/99).

     1160   __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);

     1161 

     1162   // restore potential result in rdx:rax, call result handler to restore potential result in ST0 & handle result

     1163   __ pop(ltos);

     1164   __ movptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));

     1165   __ call(t);

     1166 

     1167   // remove activation

     1168   __ movptr(t, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp

     1169   __ leave();                                // remove frame anchor

     1170   __ pop(rdi);                               // get return address

     1171   __ mov(rsp, t);                            // set sp to sender sp

     1172   __ jmp(rdi);

     1173 

     1174   if (inc_counter) {

     1175     // Handle overflow of counter and compile method

     1176     __ bind(invocation_counter_overflow);

     1177     generate_counter_overflow(&continue_after_compile);

     1178   }

     1179 

     1180   return entry_point;

     1181 }

     1182 

     1183 //

     1184 // Generic interpreted method entry to (asm) interpreter

     1185 //

     1186 address InterpreterGenerator::generate_normal_entry(bool synchronized) {

     1187   // determine code generation flags

     1188   bool inc_counter  = UseCompiler || CountCompiledCalls;

     1189 

     1190   // rbx,: methodOop

     1191   // rsi: sender sp

     1192   address entry_point = __ pc();

     1193 

     1194 

     1195   const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset());

     1196   const Address size_of_locals    (rbx, methodOopDesc::size_of_locals_offset());

     1197   const Address invocation_counter(rbx, methodOopDesc::invocation_counter_offset() + InvocationCounter::counter_offset());

     1198   const Address access_flags      (rbx, methodOopDesc::access_flags_offset());

     1199 

     1200   // get parameter size (always needed)

     1201   __ load_unsigned_short(rcx, size_of_parameters);

     1202 

     1203   // rbx,: methodOop

     1204   // rcx: size of parameters

     1205 

     1206   // rsi: sender_sp (could differ from sp+wordSize if we were called via c2i )

     1207 

     1208   __ load_unsigned_short(rdx, size_of_locals);       // get size of locals in words

     1209   __ subl(rdx, rcx);                                // rdx = no. of additional locals

     1210 

     1211   // see if we've got enough room on the stack for locals plus overhead.

     1212   generate_stack_overflow_check();

     1213 

     1214   // get return address

     1215   __ pop(rax);

     1216 

     1217   // compute beginning of parameters (rdi)

     1218   __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));

     1219 

     1220   // rdx - # of additional locals

     1221   // allocate space for locals

     1222   // explicitly initialize locals

     1223   {

     1224     Label exit, loop;

     1225     __ testl(rdx, rdx);

     1226     __ jcc(Assembler::lessEqual, exit);               // do nothing if rdx <= 0

     1227     __ bind(loop);

     1228     if (TaggedStackInterpreter) {

     1229       __ push((int32_t)NULL_WORD);                    // push tag

     1230     }

     1231     __ push((int32_t)NULL_WORD);                      // initialize local variables

     1232     __ decrement(rdx);                                // until everything initialized

     1233     __ jcc(Assembler::greater, loop);

     1234     __ bind(exit);

     1235   }

     1236 

     1237   if (inc_counter) __ movl(rcx, invocation_counter);  // (pre-)fetch invocation count

     1238   // initialize fixed part of activation frame

     1239   generate_fixed_frame(false);

     1240 

     1241   // make sure method is not native & not abstract

     1242 #ifdef ASSERT

     1243   __ movl(rax, access_flags);

     1244   {

     1245     Label L;

     1246     __ testl(rax, JVM_ACC_NATIVE);

     1247     __ jcc(Assembler::zero, L);

     1248     __ stop("tried to execute native method as non-native");

     1249     __ bind(L);

     1250   }

     1251   { Label L;

     1252     __ testl(rax, JVM_ACC_ABSTRACT);

     1253     __ jcc(Assembler::zero, L);

     1254     __ stop("tried to execute abstract method in interpreter");

     1255     __ bind(L);

     1256   }

     1257 #endif

     1258 

     1259   // Since at this point in the method invocation the exception handler

     1260   // would try to exit the monitor of synchronized methods which hasn't

     1261   // been entered yet, we set the thread local variable

     1262   // _do_not_unlock_if_synchronized to true. The remove_activation will

     1263   // check this flag.

     1264 

     1265   __ get_thread(rax);

     1266   const Address do_not_unlock_if_synchronized(rax,

     1267         in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));

     1268   __ movbool(do_not_unlock_if_synchronized, true);

     1269 

     1270   // increment invocation count & check for overflow

     1271   Label invocation_counter_overflow;

     1272   Label profile_method;

     1273   Label profile_method_continue;

     1274   if (inc_counter) {

     1275     generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue);

     1276     if (ProfileInterpreter) {

     1277       __ bind(profile_method_continue);

     1278     }

     1279   }

     1280   Label continue_after_compile;

     1281   __ bind(continue_after_compile);

     1282 

     1283   bang_stack_shadow_pages(false);

     1284 

     1285   // reset the _do_not_unlock_if_synchronized flag

     1286   __ get_thread(rax);

     1287   __ movbool(do_not_unlock_if_synchronized, false);

     1288 

     1289   // check for synchronized methods

     1290   // Must happen AFTER invocation_counter check and stack overflow check,

     1291   // so method is not locked if overflows.

     1292   //

     1293   if (synchronized) {

     1294     // Allocate monitor and lock method

     1295     lock_method();

     1296   } else {

     1297     // no synchronization necessary

     1298 #ifdef ASSERT

     1299       { Label L;

     1300         __ movl(rax, access_flags);

     1301         __ testl(rax, JVM_ACC_SYNCHRONIZED);

     1302         __ jcc(Assembler::zero, L);

     1303         __ stop("method needs synchronization");

     1304         __ bind(L);

     1305       }

     1306 #endif

     1307   }

     1308 

     1309   // start execution

     1310 #ifdef ASSERT

     1311   { Label L;

     1312      const Address monitor_block_top (rbp,

     1313                  frame::interpreter_frame_monitor_block_top_offset * wordSize);

     1314     __ movptr(rax, monitor_block_top);

     1315     __ cmpptr(rax, rsp);

     1316     __ jcc(Assembler::equal, L);

     1317     __ stop("broken stack frame setup in interpreter");

     1318     __ bind(L);

     1319   }

     1320 #endif

     1321 

     1322   // jvmti support

     1323   __ notify_method_entry();

     1324 

     1325   __ dispatch_next(vtos);

     1326 

     1327   // invocation counter overflow

     1328   if (inc_counter) {

     1329     if (ProfileInterpreter) {

     1330       // We have decided to profile this method in the interpreter

     1331       __ bind(profile_method);

     1332 

     1333       __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method), rsi, true);

     1334 

     1335       __ movptr(rbx, Address(rbp, method_offset));   // restore methodOop

     1336       __ movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));

     1337       __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);

     1338       __ test_method_data_pointer(rax, profile_method_continue);

     1339       __ addptr(rax, in_bytes(methodDataOopDesc::data_offset()));

     1340       __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);

     1341       __ jmp(profile_method_continue);

     1342     }

     1343     // Handle overflow of counter and compile method

     1344     __ bind(invocation_counter_overflow);

     1345     generate_counter_overflow(&continue_after_compile);

     1346   }

     1347 

     1348   return entry_point;

     1349 }

     1350 

     1351 //------------------------------------------------------------------------------------------------------------------------

     1352 // Entry points

     1353 //

     1354 // Here we generate the various kind of entries into the interpreter.

     1355 // The two main entry type are generic bytecode methods and native call method.

     1356 // These both come in synchronized and non-synchronized versions but the

     1357 // frame layout they create is very similar. The other method entry

     1358 // types are really just special purpose entries that are really entry

     1359 // and interpretation all in one. These are for trivial methods like

     1360 // accessor, empty, or special math methods.

     1361 //

     1362 // When control flow reaches any of the entry types for the interpreter

     1363 // the following holds ->

     1364 //

     1365 // Arguments:

     1366 //

     1367 // rbx,: methodOop

     1368 // rcx: receiver

     1369 //

     1370 //

     1371 // Stack layout immediately at entry

     1372 //

     1373 // [ return address     ] <--- rsp

     1374 // [ parameter n        ]

     1375 //   ...

     1376 // [ parameter 1        ]

     1377 // [ expression stack   ] (caller's java expression stack)

     1378 

     1379 // Assuming that we don't go to one of the trivial specialized

     1380 // entries the stack will look like below when we are ready to execute

     1381 // the first bytecode (or call the native routine). The register usage

     1382 // will be as the template based interpreter expects (see interpreter_x86.hpp).

     1383 //

     1384 // local variables follow incoming parameters immediately; i.e.

     1385 // the return address is moved to the end of the locals).

     1386 //

     1387 // [ monitor entry      ] <--- rsp

     1388 //   ...

     1389 // [ monitor entry      ]

     1390 // [ expr. stack bottom ]

     1391 // [ saved rsi          ]

     1392 // [ current rdi        ]

     1393 // [ methodOop          ]

     1394 // [ saved rbp,          ] <--- rbp,

     1395 // [ return address     ]

     1396 // [ local variable m   ]

     1397 //   ...

     1398 // [ local variable 1   ]

     1399 // [ parameter n        ]

     1400 //   ...

     1401 // [ parameter 1        ] <--- rdi

     1402 

     1403 address AbstractInterpreterGenerator::generate_method_entry(AbstractInterpreter::MethodKind kind) {

     1404   // determine code generation flags

     1405   bool synchronized = false;

     1406   address entry_point = NULL;

     1407 

     1408   switch (kind) {

     1409     case Interpreter::zerolocals             :                                                                             break;

     1410     case Interpreter::zerolocals_synchronized: synchronized = true;                                                        break;

     1411     case Interpreter::native                 : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(false);  break;

     1412     case Interpreter::native_synchronized    : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(true);   break;

     1413     case Interpreter::empty                  : entry_point = ((InterpreterGenerator*)this)->generate_empty_entry();        break;

     1414     case Interpreter::accessor               : entry_point = ((InterpreterGenerator*)this)->generate_accessor_entry();     break;

     1415     case Interpreter::abstract               : entry_point = ((InterpreterGenerator*)this)->generate_abstract_entry();     break;

     1416     case Interpreter::method_handle          : entry_point = ((InterpreterGenerator*)this)->generate_method_handle_entry(); break;

     1417 

     1418     case Interpreter::java_lang_math_sin     : // fall thru

     1419     case Interpreter::java_lang_math_cos     : // fall thru

     1420     case Interpreter::java_lang_math_tan     : // fall thru

     1421     case Interpreter::java_lang_math_abs     : // fall thru

     1422     case Interpreter::java_lang_math_log     : // fall thru

     1423     case Interpreter::java_lang_math_log10   : // fall thru

     1424     case Interpreter::java_lang_math_sqrt    : entry_point = ((InterpreterGenerator*)this)->generate_math_entry(kind);     break;

     1425     default                                  : ShouldNotReachHere();                                                       break;

     1426   }

     1427 

     1428   if (entry_point) return entry_point;

     1429 

     1430   return ((InterpreterGenerator*)this)->generate_normal_entry(synchronized);

     1431 

     1432 }

     1433 

     1434 // These should never be compiled since the interpreter will prefer

     1435 // the compiled version to the intrinsic version.

     1436 bool AbstractInterpreter::can_be_compiled(methodHandle m) {

     1437   switch (method_kind(m)) {

     1438     case Interpreter::java_lang_math_sin     : // fall thru

     1439     case Interpreter::java_lang_math_cos     : // fall thru

     1440     case Interpreter::java_lang_math_tan     : // fall thru

     1441     case Interpreter::java_lang_math_abs     : // fall thru

     1442     case Interpreter::java_lang_math_log     : // fall thru

     1443     case Interpreter::java_lang_math_log10   : // fall thru

     1444     case Interpreter::java_lang_math_sqrt    :

     1445       return false;

     1446     default:

     1447       return true;

     1448   }

     1449 }

     1450 

     1451 // How much stack a method activation needs in words.

     1452 int AbstractInterpreter::size_top_interpreter_activation(methodOop method) {

     1453 

     1454   const int stub_code = 4;  // see generate_call_stub

     1455   // Save space for one monitor to get into the interpreted method in case

     1456   // the method is synchronized

     1457   int monitor_size    = method->is_synchronized() ?

     1458                                 1*frame::interpreter_frame_monitor_size() : 0;

     1459 

     1460   // total overhead size: entry_size + (saved rbp, thru expr stack bottom).

     1461   // be sure to change this if you add/subtract anything to/from the overhead area

     1462   const int overhead_size = -frame::interpreter_frame_initial_sp_offset;

     1463 

     1464   const int extra_stack = methodOopDesc::extra_stack_entries();

     1465   const int method_stack = (method->max_locals() + method->max_stack() + extra_stack) *

     1466                            Interpreter::stackElementWords();

     1467   return overhead_size + method_stack + stub_code;

     1468 }

     1469 

     1470 // asm based interpreter deoptimization helpers

     1471 

     1472 int AbstractInterpreter::layout_activation(methodOop method,

     1473                                            int tempcount,

     1474                                            int popframe_extra_args,

     1475                                            int moncount,

     1476                                            int callee_param_count,

     1477                                            int callee_locals,

     1478                                            frame* caller,

     1479                                            frame* interpreter_frame,

     1480                                            bool is_top_frame) {

     1481   // Note: This calculation must exactly parallel the frame setup

     1482   // in AbstractInterpreterGenerator::generate_method_entry.

     1483   // If interpreter_frame!=NULL, set up the method, locals, and monitors.

     1484   // The frame interpreter_frame, if not NULL, is guaranteed to be the right size,

     1485   // as determined by a previous call to this method.

     1486   // It is also guaranteed to be walkable even though it is in a skeletal state

     1487   // NOTE: return size is in words not bytes

     1488 

     1489   // fixed size of an interpreter frame:

     1490   int max_locals = method->max_locals() * Interpreter::stackElementWords();

     1491   int extra_locals = (method->max_locals() - method->size_of_parameters()) *

     1492                      Interpreter::stackElementWords();

     1493 

     1494   int overhead = frame::sender_sp_offset - frame::interpreter_frame_initial_sp_offset;

     1495 

     1496   // Our locals were accounted for by the caller (or last_frame_adjust on the transistion)

     1497   // Since the callee parameters already account for the callee's params we only need to account for

     1498   // the extra locals.

     1499 

     1500 

     1501   int size = overhead +

     1502          ((callee_locals - callee_param_count)*Interpreter::stackElementWords()) +

     1503          (moncount*frame::interpreter_frame_monitor_size()) +

     1504          tempcount*Interpreter::stackElementWords() + popframe_extra_args;

     1505 

     1506   if (interpreter_frame != NULL) {

     1507 #ifdef ASSERT

     1508     if (!EnableMethodHandles)

     1509       // @@@ FIXME: Should we correct interpreter_frame_sender_sp in the calling sequences?

     1510       // Probably, since deoptimization doesn't work yet.

     1511       assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable");

     1512     assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable(2)");

     1513 #endif

     1514 

     1515     interpreter_frame->interpreter_frame_set_method(method);

     1516     // NOTE the difference in using sender_sp and interpreter_frame_sender_sp

     1517     // interpreter_frame_sender_sp is the original sp of the caller (the unextended_sp)

     1518     // and sender_sp is fp+8

     1519     intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1;

     1520 

     1521     interpreter_frame->interpreter_frame_set_locals(locals);

     1522     BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin();

     1523     BasicObjectLock* monbot = montop - moncount;

     1524     interpreter_frame->interpreter_frame_set_monitor_end(monbot);

     1525 

     1526     // Set last_sp

     1527     intptr_t*  rsp = (intptr_t*) monbot  -

     1528                      tempcount*Interpreter::stackElementWords() -

     1529                      popframe_extra_args;

     1530     interpreter_frame->interpreter_frame_set_last_sp(rsp);

     1531 

     1532     // All frames but the initial (oldest) interpreter frame we fill in have a

     1533     // value for sender_sp that allows walking the stack but isn't

     1534     // truly correct. Correct the value here.

     1535 

     1536     if (extra_locals != 0 &&

     1537         interpreter_frame->sender_sp() == interpreter_frame->interpreter_frame_sender_sp() ) {

     1538       interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() + extra_locals);

     1539     }

     1540     *interpreter_frame->interpreter_frame_cache_addr() =

     1541       method->constants()->cache();

     1542   }

     1543   return size;

     1544 }

     1545 

     1546 

     1547 //------------------------------------------------------------------------------------------------------------------------

     1548 // Exceptions

     1549 

     1550 void TemplateInterpreterGenerator::generate_throw_exception() {

     1551   // Entry point in previous activation (i.e., if the caller was interpreted)

     1552   Interpreter::_rethrow_exception_entry = __ pc();

     1553 

     1554   // Restore sp to interpreter_frame_last_sp even though we are going

     1555   // to empty the expression stack for the exception processing.

     1556   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);

     1557   // rax,: exception

     1558   // rdx: return address/pc that threw exception

     1559   __ restore_bcp();                              // rsi points to call/send

     1560   __ restore_locals();

     1561 

     1562   // Entry point for exceptions thrown within interpreter code

     1563   Interpreter::_throw_exception_entry = __ pc();

     1564   // expression stack is undefined here

     1565   // rax,: exception

     1566   // rsi: exception bcp

     1567   __ verify_oop(rax);

     1568 

     1569   // expression stack must be empty before entering the VM in case of an exception

     1570   __ empty_expression_stack();

     1571   __ empty_FPU_stack();

     1572   // find exception handler address and preserve exception oop

     1573   __ call_VM(rdx, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), rax);

     1574   // rax,: exception handler entry point

     1575   // rdx: preserved exception oop

     1576   // rsi: bcp for exception handler

     1577   __ push_ptr(rdx);                              // push exception which is now the only value on the stack

     1578   __ jmp(rax);                                   // jump to exception handler (may be _remove_activation_entry!)

     1579 

     1580   // If the exception is not handled in the current frame the frame is removed and

     1581   // the exception is rethrown (i.e. exception continuation is _rethrow_exception).

     1582   //

     1583   // Note: At this point the bci is still the bxi for the instruction which caused

     1584   //       the exception and the expression stack is empty. Thus, for any VM calls

     1585   //       at this point, GC will find a legal oop map (with empty expression stack).

     1586 

     1587   // In current activation

     1588   // tos: exception

     1589   // rsi: exception bcp

     1590 

     1591   //

     1592   // JVMTI PopFrame support

     1593   //

     1594 

     1595    Interpreter::_remove_activation_preserving_args_entry = __ pc();

     1596   __ empty_expression_stack();

     1597   __ empty_FPU_stack();

     1598   // Set the popframe_processing bit in pending_popframe_condition indicating that we are

     1599   // currently handling popframe, so that call_VMs that may happen later do not trigger new

     1600   // popframe handling cycles.

     1601   __ get_thread(rcx);

     1602   __ movl(rdx, Address(rcx, JavaThread::popframe_condition_offset()));

     1603   __ orl(rdx, JavaThread::popframe_processing_bit);

     1604   __ movl(Address(rcx, JavaThread::popframe_condition_offset()), rdx);

     1605 

     1606   {

     1607     // Check to see whether we are returning to a deoptimized frame.

     1608     // (The PopFrame call ensures that the caller of the popped frame is

     1609     // either interpreted or compiled and deoptimizes it if compiled.)

     1610     // In this case, we can't call dispatch_next() after the frame is

     1611     // popped, but instead must save the incoming arguments and restore

     1612     // them after deoptimization has occurred.

     1613     //

     1614     // Note that we don't compare the return PC against the

     1615     // deoptimization blob's unpack entry because of the presence of

     1616     // adapter frames in C2.

     1617     Label caller_not_deoptimized;

     1618     __ movptr(rdx, Address(rbp, frame::return_addr_offset * wordSize));

     1619     __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), rdx);

     1620     __ testl(rax, rax);

     1621     __ jcc(Assembler::notZero, caller_not_deoptimized);

     1622 

     1623     // Compute size of arguments for saving when returning to deoptimized caller

     1624     __ get_method(rax);

     1625     __ verify_oop(rax);

     1626     __ load_unsigned_short(rax, Address(rax, in_bytes(methodOopDesc::size_of_parameters_offset())));

     1627     __ shlptr(rax, Interpreter::logStackElementSize());

     1628     __ restore_locals();

     1629     __ subptr(rdi, rax);

     1630     __ addptr(rdi, wordSize);

     1631     // Save these arguments

     1632     __ get_thread(rcx);

     1633     __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), rcx, rax, rdi);

     1634 

     1635     __ remove_activation(vtos, rdx,

     1636                          /* throw_monitor_exception */ false,

     1637                          /* install_monitor_exception */ false,

     1638                          /* notify_jvmdi */ false);

     1639 

     1640     // Inform deoptimization that it is responsible for restoring these arguments

     1641     __ get_thread(rcx);

     1642     __ movl(Address(rcx, JavaThread::popframe_condition_offset()), JavaThread::popframe_force_deopt_reexecution_bit);

     1643 

     1644     // Continue in deoptimization handler

     1645     __ jmp(rdx);

     1646 

     1647     __ bind(caller_not_deoptimized);

     1648   }

     1649 

     1650   __ remove_activation(vtos, rdx,

     1651                        /* throw_monitor_exception */ false,

     1652                        /* install_monitor_exception */ false,

     1653                        /* notify_jvmdi */ false);

     1654 

     1655   // Finish with popframe handling

     1656   // A previous I2C followed by a deoptimization might have moved the

     1657   // outgoing arguments further up the stack. PopFrame expects the

     1658   // mutations to those outgoing arguments to be preserved and other

     1659   // constraints basically require this frame to look exactly as

     1660   // though it had previously invoked an interpreted activation with

     1661   // no space between the top of the expression stack (current

     1662   // last_sp) and the top of stack. Rather than force deopt to

     1663   // maintain this kind of invariant all the time we call a small

     1664   // fixup routine to move the mutated arguments onto the top of our

     1665   // expression stack if necessary.

     1666   __ mov(rax, rsp);

     1667   __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));

     1668   __ get_thread(rcx);

     1669   // PC must point into interpreter here

     1670   __ set_last_Java_frame(rcx, noreg, rbp, __ pc());

     1671   __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), rcx, rax, rbx);

     1672   __ get_thread(rcx);

     1673   __ reset_last_Java_frame(rcx, true, true);

     1674   // Restore the last_sp and null it out

     1675   __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));

     1676   __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);

     1677 

     1678   __ restore_bcp();

     1679   __ restore_locals();

     1680   // The method data pointer was incremented already during

     1681   // call profiling. We have to restore the mdp for the current bcp.

     1682   if (ProfileInterpreter) {

     1683     __ set_method_data_pointer_for_bcp();

     1684   }

     1685 

     1686   // Clear the popframe condition flag

     1687   __ get_thread(rcx);

     1688   __ movl(Address(rcx, JavaThread::popframe_condition_offset()), JavaThread::popframe_inactive);

     1689 

     1690   __ dispatch_next(vtos);

     1691   // end of PopFrame support

     1692 

     1693   Interpreter::_remove_activation_entry = __ pc();

     1694 

     1695   // preserve exception over this code sequence

     1696   __ pop_ptr(rax);

     1697   __ get_thread(rcx);

     1698   __ movptr(Address(rcx, JavaThread::vm_result_offset()), rax);

     1699   // remove the activation (without doing throws on illegalMonitorExceptions)

     1700   __ remove_activation(vtos, rdx, false, true, false);

     1701   // restore exception

     1702   __ get_thread(rcx);

     1703   __ movptr(rax, Address(rcx, JavaThread::vm_result_offset()));

     1704   __ movptr(Address(rcx, JavaThread::vm_result_offset()), NULL_WORD);

     1705   __ verify_oop(rax);

     1706 

     1707   // Inbetween activations - previous activation type unknown yet

     1708   // compute continuation point - the continuation point expects

     1709   // the following registers set up:

     1710   //

     1711   // rax,: exception

     1712   // rdx: return address/pc that threw exception

     1713   // rsp: expression stack of caller

     1714   // rbp,: rbp, of caller

     1715   __ push(rax);                                  // save exception

     1716   __ push(rdx);                                  // save return address

     1717   __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rdx);

     1718   __ mov(rbx, rax);                              // save exception handler

     1719   __ pop(rdx);                                   // restore return address

     1720   __ pop(rax);                                   // restore exception

     1721   // Note that an "issuing PC" is actually the next PC after the call

     1722   __ jmp(rbx);                                   // jump to exception handler of caller

     1723 }

     1724 

     1725 

     1726 //

     1727 // JVMTI ForceEarlyReturn support

     1728 //

     1729 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {

     1730   address entry = __ pc();

     1731 

     1732   __ restore_bcp();

     1733   __ restore_locals();

     1734   __ empty_expression_stack();

     1735   __ empty_FPU_stack();

     1736   __ load_earlyret_value(state);

     1737 

     1738   __ get_thread(rcx);

     1739   __ movptr(rcx, Address(rcx, JavaThread::jvmti_thread_state_offset()));

     1740   const Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());

     1741 

     1742   // Clear the earlyret state

     1743   __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);

     1744 

     1745   __ remove_activation(state, rsi,

     1746                        false, /* throw_monitor_exception */

     1747                        false, /* install_monitor_exception */

     1748                        true); /* notify_jvmdi */

     1749   __ jmp(rsi);

     1750   return entry;

     1751 } // end of ForceEarlyReturn support

     1752 

     1753 

     1754 //------------------------------------------------------------------------------------------------------------------------

     1755 // Helper for vtos entry point generation

     1756 

     1757 void TemplateInterpreterGenerator::set_vtos_entry_points (Template* t, address& bep, address& cep, address& sep, address& aep, address& iep, address& lep, address& fep, address& dep, address& vep) {

     1758   assert(t->is_valid() && t->tos_in() == vtos, "illegal template");

     1759   Label L;

     1760   fep = __ pc(); __ push(ftos); __ jmp(L);

     1761   dep = __ pc(); __ push(dtos); __ jmp(L);

     1762   lep = __ pc(); __ push(ltos); __ jmp(L);

     1763   aep = __ pc(); __ push(atos); __ jmp(L);

     1764   bep = cep = sep =             // fall through

     1765   iep = __ pc(); __ push(itos); // fall through

     1766   vep = __ pc(); __ bind(L);    // fall through

     1767   generate_and_dispatch(t);

     1768 }

     1769 

     1770 //------------------------------------------------------------------------------------------------------------------------

     1771 // Generation of individual instructions

     1772 

     1773 // helpers for generate_and_dispatch

     1774 

     1775 

     1776 

     1777 InterpreterGenerator::InterpreterGenerator(StubQueue* code)

     1778  : TemplateInterpreterGenerator(code) {

     1779    generate_all(); // down here so it can be "virtual"

     1780 }

     1781 

     1782 //------------------------------------------------------------------------------------------------------------------------

     1783 

     1784 // Non-product code

     1785 #ifndef PRODUCT

     1786 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {

     1787   address entry = __ pc();

     1788 

     1789   // prepare expression stack

     1790   __ pop(rcx);          // pop return address so expression stack is 'pure'

     1791   __ push(state);       // save tosca

     1792 

     1793   // pass tosca registers as arguments & call tracer

     1794   __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), rcx, rax, rdx);

     1795   __ mov(rcx, rax);     // make sure return address is not destroyed by pop(state)

     1796   __ pop(state);        // restore tosca

     1797 

     1798   // return

     1799   __ jmp(rcx);

     1800 

     1801   return entry;

     1802 }

     1803 

     1804 

     1805 void TemplateInterpreterGenerator::count_bytecode() {

     1806   __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));

     1807 }

     1808 

     1809 

     1810 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {

     1811   __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));

     1812 }

     1813 

     1814 

     1815 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {

     1816   __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);

     1817   __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);

     1818   __ orl(rbx, ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes);

     1819   ExternalAddress table((address) BytecodePairHistogram::_counters);

     1820   Address index(noreg, rbx, Address::times_4);

     1821   __ incrementl(ArrayAddress(table, index));

     1822 }

     1823 

     1824 

     1825 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {

     1826   // Call a little run-time stub to avoid blow-up for each bytecode.

     1827   // The run-time runtime saves the right registers, depending on

     1828   // the tosca in-state for the given template.

     1829   assert(Interpreter::trace_code(t->tos_in()) != NULL,

     1830          "entry must have been generated");

     1831   __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));

     1832 }

     1833 

     1834 

     1835 void TemplateInterpreterGenerator::stop_interpreter_at() {

     1836   Label L;

     1837   __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),

     1838            StopInterpreterAt);

     1839   __ jcc(Assembler::notEqual, L);

     1840   __ int3();

     1841   __ bind(L);

     1842 }

     1843 #endif // !PRODUCT

     1844 #endif // CC_INTERP