1 /*

     2  * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright (c) 2014, Red Hat Inc. All rights reserved.

     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     5  *

     6  * This code is free software; you can redistribute it and/or modify it

     7  * under the terms of the GNU General Public License version 2 only, as

     8  * published by the Free Software Foundation.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * or visit www.oracle.com if you need additional information or have any

    22  * questions.

    23  *

    24  */

    25 

    26 #include "precompiled.hpp"

    27 #include "c1/c1_CodeStubs.hpp"

    28 #include "c1/c1_FrameMap.hpp"

    29 #include "c1/c1_LIRAssembler.hpp"

    30 #include "c1/c1_MacroAssembler.hpp"

    31 #include "c1/c1_Runtime1.hpp"

    32 #include "nativeInst_aarch64.hpp"

    33 #include "runtime/sharedRuntime.hpp"

    34 #include "vmreg_aarch64.inline.hpp"

    35 #if INCLUDE_ALL_GCS

    36 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"

    37 #endif

    38 

    39 

    40 #define __ ce->masm()->

    41 

    42 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {

    43   __ bind(_entry);

    44   ce->store_parameter(_method->as_register(), 1);

    45   ce->store_parameter(_bci, 0);

    46   __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id)));

    47   ce->add_call_info_here(_info);

    48   ce->verify_oop_map(_info);

    49   __ b(_continuation);

    50 }

    51 

    52 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,

    53                                bool throw_index_out_of_bounds_exception)

    54   : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)

    55   , _index(index)

    56 {

    57   assert(info != NULL, "must have info");

    58   _info = new CodeEmitInfo(info);

    59 }

    60 

    61 void RangeCheckStub::emit_code(LIR_Assembler* ce) {

    62   __ bind(_entry);

    63   if (_info->deoptimize_on_exception()) {

    64     address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);

    65     __ far_call(RuntimeAddress(a));

    66     ce->add_call_info_here(_info);

    67     ce->verify_oop_map(_info);

    68     debug_only(__ should_not_reach_here());

    69     return;

    70   }

    71 

    72   if (_index->is_cpu_register()) {

    73     __ mov(rscratch1, _index->as_register());

    74   } else {

    75     __ mov(rscratch1, _index->as_jint());

    76   }

    77   Runtime1::StubID stub_id;

    78   if (_throw_index_out_of_bounds_exception) {

    79     stub_id = Runtime1::throw_index_exception_id;

    80   } else {

    81     stub_id = Runtime1::throw_range_check_failed_id;

    82   }

    83   __ far_call(RuntimeAddress(Runtime1::entry_for(stub_id)), NULL, rscratch2);

    84   ce->add_call_info_here(_info);

    85   ce->verify_oop_map(_info);

    86   debug_only(__ should_not_reach_here());

    87 }

    88 

    89 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {

    90   _info = new CodeEmitInfo(info);

    91 }

    92 

    93 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {

    94   __ bind(_entry);

    95   address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);

    96   __ far_call(RuntimeAddress(a));

    97   ce->add_call_info_here(_info);

    98   ce->verify_oop_map(_info);

    99   debug_only(__ should_not_reach_here());

   100 }

   101 

   102 void DivByZeroStub::emit_code(LIR_Assembler* ce) {

   103   if (_offset != -1) {

   104     ce->compilation()->implicit_exception_table()->append(_offset, __ offset());

   105   }

   106   __ bind(_entry);

   107   __ far_call(Address(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type));

   108   ce->add_call_info_here(_info);

   109   ce->verify_oop_map(_info);

   110 #ifdef ASSERT

   111   __ should_not_reach_here();

   112 #endif

   113 }

   114 

   115 

   116 

   117 // Implementation of NewInstanceStub

   118 

   119 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {

   120   _result = result;

   121   _klass = klass;

   122   _klass_reg = klass_reg;

   123   _info = new CodeEmitInfo(info);

   124   assert(stub_id == Runtime1::new_instance_id                 ||

   125          stub_id == Runtime1::fast_new_instance_id            ||

   126          stub_id == Runtime1::fast_new_instance_init_check_id,

   127          "need new_instance id");

   128   _stub_id   = stub_id;

   129 }

   130 

   131 

   132 

   133 void NewInstanceStub::emit_code(LIR_Assembler* ce) {

   134   assert(__ rsp_offset() == 0, "frame size should be fixed");

   135   __ bind(_entry);

   136   __ mov(r3, _klass_reg->as_register());

   137   __ far_call(RuntimeAddress(Runtime1::entry_for(_stub_id)));

   138   ce->add_call_info_here(_info);

   139   ce->verify_oop_map(_info);

   140   assert(_result->as_register() == r0, "result must in r0,");

   141   __ b(_continuation);

   142 }

   143 

   144 

   145 // Implementation of NewTypeArrayStub

   146 

   147 // Implementation of NewTypeArrayStub

   148 

   149 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {

   150   _klass_reg = klass_reg;

   151   _length = length;

   152   _result = result;

   153   _info = new CodeEmitInfo(info);

   154 }

   155 

   156 

   157 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {

   158   assert(__ rsp_offset() == 0, "frame size should be fixed");

   159   __ bind(_entry);

   160   assert(_length->as_register() == r19, "length must in r19,");

   161   assert(_klass_reg->as_register() == r3, "klass_reg must in r3");

   162   __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));

   163   ce->add_call_info_here(_info);

   164   ce->verify_oop_map(_info);

   165   assert(_result->as_register() == r0, "result must in r0");

   166   __ b(_continuation);

   167 }

   168 

   169 

   170 // Implementation of NewObjectArrayStub

   171 

   172 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {

   173   _klass_reg = klass_reg;

   174   _result = result;

   175   _length = length;

   176   _info = new CodeEmitInfo(info);

   177 }

   178 

   179 

   180 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {

   181   assert(__ rsp_offset() == 0, "frame size should be fixed");

   182   __ bind(_entry);

   183   assert(_length->as_register() == r19, "length must in r19,");

   184   assert(_klass_reg->as_register() == r3, "klass_reg must in r3");

   185   __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));

   186   ce->add_call_info_here(_info);

   187   ce->verify_oop_map(_info);

   188   assert(_result->as_register() == r0, "result must in r0");

   189   __ b(_continuation);

   190 }

   191 // Implementation of MonitorAccessStubs

   192 

   193 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)

   194 : MonitorAccessStub(obj_reg, lock_reg)

   195 {

   196   _info = new CodeEmitInfo(info);

   197 }

   198 

   199 

   200 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {

   201   assert(__ rsp_offset() == 0, "frame size should be fixed");

   202   __ bind(_entry);

   203   ce->store_parameter(_obj_reg->as_register(),  1);

   204   ce->store_parameter(_lock_reg->as_register(), 0);

   205   Runtime1::StubID enter_id;

   206   if (ce->compilation()->has_fpu_code()) {

   207     enter_id = Runtime1::monitorenter_id;

   208   } else {

   209     enter_id = Runtime1::monitorenter_nofpu_id;

   210   }

   211   __ far_call(RuntimeAddress(Runtime1::entry_for(enter_id)));

   212   ce->add_call_info_here(_info);

   213   ce->verify_oop_map(_info);

   214   __ b(_continuation);

   215 }

   216 

   217 

   218 void MonitorExitStub::emit_code(LIR_Assembler* ce) {

   219   __ bind(_entry);

   220   if (_compute_lock) {

   221     // lock_reg was destroyed by fast unlocking attempt => recompute it

   222     ce->monitor_address(_monitor_ix, _lock_reg);

   223   }

   224   ce->store_parameter(_lock_reg->as_register(), 0);

   225   // note: non-blocking leaf routine => no call info needed

   226   Runtime1::StubID exit_id;

   227   if (ce->compilation()->has_fpu_code()) {

   228     exit_id = Runtime1::monitorexit_id;

   229   } else {

   230     exit_id = Runtime1::monitorexit_nofpu_id;

   231   }

   232   __ adr(lr, _continuation);

   233   __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));

   234 }

   235 

   236 

   237 // Implementation of patching:

   238 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)

   239 // - Replace original code with a call to the stub

   240 // At Runtime:

   241 // - call to stub, jump to runtime

   242 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)

   243 // - in runtime: after initializing class, restore original code, reexecute instruction

   244 

   245 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;

   246 

   247 void PatchingStub::align_patch_site(MacroAssembler* masm) {

   248 }

   249 

   250 void PatchingStub::emit_code(LIR_Assembler* ce) {

   251   assert(false, "AArch64 should not use C1 runtime patching");

   252 }

   253 

   254 

   255 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {

   256   __ bind(_entry);

   257   __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));

   258   ce->add_call_info_here(_info);

   259   DEBUG_ONLY(__ should_not_reach_here());

   260 }

   261 

   262 

   263 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {

   264   address a;

   265   if (_info->deoptimize_on_exception()) {

   266     // Deoptimize, do not throw the exception, because it is probably wrong to do it here.

   267     a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);

   268   } else {

   269     a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);

   270   }

   271 

   272   ce->compilation()->implicit_exception_table()->append(_offset, __ offset());

   273   __ bind(_entry);

   274   __ far_call(RuntimeAddress(a));

   275   ce->add_call_info_here(_info);

   276   ce->verify_oop_map(_info);

   277   debug_only(__ should_not_reach_here());

   278 }

   279 

   280 

   281 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {

   282   assert(__ rsp_offset() == 0, "frame size should be fixed");

   283 

   284   __ bind(_entry);

   285   // pass the object in a scratch register because all other registers

   286   // must be preserved

   287   if (_obj->is_cpu_register()) {

   288     __ mov(rscratch1, _obj->as_register());

   289   }

   290   __ far_call(RuntimeAddress(Runtime1::entry_for(_stub)), NULL, rscratch2);

   291   ce->add_call_info_here(_info);

   292   debug_only(__ should_not_reach_here());

   293 }

   294 

   295 

   296 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {

   297   //---------------slow case: call to native-----------------

   298   __ bind(_entry);

   299   // Figure out where the args should go

   300   // This should really convert the IntrinsicID to the Method* and signature

   301   // but I don't know how to do that.

   302   //

   303   VMRegPair args[5];

   304   BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};

   305   SharedRuntime::java_calling_convention(signature, args, 5, true);

   306 

   307   // push parameters

   308   // (src, src_pos, dest, destPos, length)

   309   Register r[5];

   310   r[0] = src()->as_register();

   311   r[1] = src_pos()->as_register();

   312   r[2] = dst()->as_register();

   313   r[3] = dst_pos()->as_register();

   314   r[4] = length()->as_register();

   315 

   316   // next registers will get stored on the stack

   317   for (int i = 0; i < 5 ; i++ ) {

   318     VMReg r_1 = args[i].first();

   319     if (r_1->is_stack()) {

   320       int st_off = r_1->reg2stack() * wordSize;

   321       __ str (r[i], Address(sp, st_off));

   322     } else {

   323       assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");

   324     }

   325   }

   326 

   327   ce->align_call(lir_static_call);

   328 

   329   ce->emit_static_call_stub();

   330   Address resolve(SharedRuntime::get_resolve_static_call_stub(),

   331                   relocInfo::static_call_type);

   332   __ trampoline_call(resolve);

   333   ce->add_call_info_here(info());

   334 

   335 #ifndef PRODUCT

   336   __ lea(rscratch2, ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));

   337   __ incrementw(Address(rscratch2));

   338 #endif

   339 

   340   __ b(_continuation);

   341 }

   342 

   343 

   344 /////////////////////////////////////////////////////////////////////////////

   345 #if INCLUDE_ALL_GCS

   346 

   347 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {

   348   // At this point we know that marking is in progress.

   349   // If do_load() is true then we have to emit the

   350   // load of the previous value; otherwise it has already

   351   // been loaded into _pre_val.

   352 

   353   __ bind(_entry);

   354   assert(pre_val()->is_register(), "Precondition.");

   355 

   356   Register pre_val_reg = pre_val()->as_register();

   357 

   358   if (do_load()) {

   359     ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/);

   360   }

   361   __ cbz(pre_val_reg, _continuation);

   362   ce->store_parameter(pre_val()->as_register(), 0);

   363   __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_pre_barrier_slow_id)));

   364   __ b(_continuation);

   365 }

   366 

   367 jbyte* G1PostBarrierStub::_byte_map_base = NULL;

   368 

   369 jbyte* G1PostBarrierStub::byte_map_base_slow() {

   370   BarrierSet* bs = Universe::heap()->barrier_set();

   371   assert(bs->is_a(BarrierSet::G1SATBCTLogging),

   372          "Must be if we're using this.");

   373   return ((G1SATBCardTableModRefBS*)bs)->byte_map_base;

   374 }

   375 

   376 

   377 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {

   378   __ bind(_entry);

   379   assert(addr()->is_register(), "Precondition.");

   380   assert(new_val()->is_register(), "Precondition.");

   381   Register new_val_reg = new_val()->as_register();

   382   __ cbz(new_val_reg, _continuation);

   383   ce->store_parameter(addr()->as_pointer_register(), 0);

   384   __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_post_barrier_slow_id)));

   385   __ b(_continuation);

   386 }

   387 

   388 #endif // INCLUDE_ALL_GCS

   389 /////////////////////////////////////////////////////////////////////////////

   390 

   391 #undef __