1 /*

     2  * Copyright (c) 1999, 2015, 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/g1/g1SATBCardTableModRefBS.hpp"

    37 #endif

    38 

    39 

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

    41 

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

    43   __ bind(_entry);

    44   Metadata *m = _method->as_constant_ptr()->as_metadata();

    45   __ mov_metadata(rscratch1, m);

    46   ce->store_parameter(rscratch1, 1);

    47   ce->store_parameter(_bci, 0);

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

    49   ce->add_call_info_here(_info);

    50   ce->verify_oop_map(_info);

    51   __ b(_continuation);

    52 }

    53 

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

    55                                bool throw_index_out_of_bounds_exception)

    56   : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)

    57   , _index(index)

    58 {

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

    60   _info = new CodeEmitInfo(info);

    61 }

    62 

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

    64   __ bind(_entry);

    65   if (_info->deoptimize_on_exception()) {

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

    67     __ far_call(RuntimeAddress(a));

    68     ce->add_call_info_here(_info);

    69     ce->verify_oop_map(_info);

    70     debug_only(__ should_not_reach_here());

    71     return;

    72   }

    73 

    74   if (_index->is_cpu_register()) {

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

    76   } else {

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

    78   }

    79   Runtime1::StubID stub_id;

    80   if (_throw_index_out_of_bounds_exception) {

    81     stub_id = Runtime1::throw_index_exception_id;

    82   } else {

    83     stub_id = Runtime1::throw_range_check_failed_id;

    84   }

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

    86   ce->add_call_info_here(_info);

    87   ce->verify_oop_map(_info);

    88   debug_only(__ should_not_reach_here());

    89 }

    90 

    91 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {

    92   _info = new CodeEmitInfo(info);

    93 }

    94 

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

    96   __ bind(_entry);

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

    98   __ far_call(RuntimeAddress(a));

    99   ce->add_call_info_here(_info);

   100   ce->verify_oop_map(_info);

   101   debug_only(__ should_not_reach_here());

   102 }

   103 

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

   105   if (_offset != -1) {

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

   107   }

   108   __ bind(_entry);

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

   110   ce->add_call_info_here(_info);

   111   ce->verify_oop_map(_info);

   112 #ifdef ASSERT

   113   __ should_not_reach_here();

   114 #endif

   115 }

   116 

   117 

   118 

   119 // Implementation of NewInstanceStub

   120 

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

   122   _result = result;

   123   _klass = klass;

   124   _klass_reg = klass_reg;

   125   _info = new CodeEmitInfo(info);

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

   127          stub_id == Runtime1::fast_new_instance_id            ||

   128          stub_id == Runtime1::fast_new_instance_init_check_id,

   129          "need new_instance id");

   130   _stub_id   = stub_id;

   131 }

   132 

   133 

   134 

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

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

   137   __ bind(_entry);

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

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

   140   ce->add_call_info_here(_info);

   141   ce->verify_oop_map(_info);

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

   143   __ b(_continuation);

   144 }

   145 

   146 

   147 // Implementation of NewTypeArrayStub

   148 

   149 // Implementation of NewTypeArrayStub

   150 

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

   152   _klass_reg = klass_reg;

   153   _length = length;

   154   _result = result;

   155   _info = new CodeEmitInfo(info);

   156 }

   157 

   158 

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

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

   161   __ bind(_entry);

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

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

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

   165   ce->add_call_info_here(_info);

   166   ce->verify_oop_map(_info);

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

   168   __ b(_continuation);

   169 }

   170 

   171 

   172 // Implementation of NewObjectArrayStub

   173 

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

   175   _klass_reg = klass_reg;

   176   _result = result;

   177   _length = length;

   178   _info = new CodeEmitInfo(info);

   179 }

   180 

   181 

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

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

   184   __ bind(_entry);

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

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

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

   188   ce->add_call_info_here(_info);

   189   ce->verify_oop_map(_info);

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

   191   __ b(_continuation);

   192 }

   193 // Implementation of MonitorAccessStubs

   194 

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

   196 : MonitorAccessStub(obj_reg, lock_reg)

   197 {

   198   _info = new CodeEmitInfo(info);

   199 }

   200 

   201 

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

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

   204   __ bind(_entry);

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

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

   207   Runtime1::StubID enter_id;

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

   209     enter_id = Runtime1::monitorenter_id;

   210   } else {

   211     enter_id = Runtime1::monitorenter_nofpu_id;

   212   }

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

   214   ce->add_call_info_here(_info);

   215   ce->verify_oop_map(_info);

   216   __ b(_continuation);

   217 }

   218 

   219 

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

   221   __ bind(_entry);

   222   if (_compute_lock) {

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

   224     ce->monitor_address(_monitor_ix, _lock_reg);

   225   }

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

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

   228   Runtime1::StubID exit_id;

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

   230     exit_id = Runtime1::monitorexit_id;

   231   } else {

   232     exit_id = Runtime1::monitorexit_nofpu_id;

   233   }

   234   __ adr(lr, _continuation);

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

   236 }

   237 

   238 

   239 // Implementation of patching:

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

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

   242 // At Runtime:

   243 // - call to stub, jump to runtime

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

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

   246 

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

   248 

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

   250 }

   251 

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

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

   254 }

   255 

   256 

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

   258   __ bind(_entry);

   259   ce->store_parameter(_trap_request, 0);

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

   261   ce->add_call_info_here(_info);

   262   DEBUG_ONLY(__ should_not_reach_here());

   263 }

   264 

   265 

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

   267   address a;

   268   if (_info->deoptimize_on_exception()) {

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

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

   271   } else {

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

   273   }

   274 

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

   276   __ bind(_entry);

   277   __ far_call(RuntimeAddress(a));

   278   ce->add_call_info_here(_info);

   279   ce->verify_oop_map(_info);

   280   debug_only(__ should_not_reach_here());

   281 }

   282 

   283 

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

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

   286 

   287   __ bind(_entry);

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

   289   // must be preserved

   290   if (_obj->is_cpu_register()) {

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

   292   }

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

   294   ce->add_call_info_here(_info);

   295   debug_only(__ should_not_reach_here());

   296 }

   297 

   298 

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

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

   301   __ bind(_entry);

   302   // Figure out where the args should go

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

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

   305   //

   306   VMRegPair args[5];

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

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

   309 

   310   // push parameters

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

   312   Register r[5];

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

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

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

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

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

   318 

   319   // next registers will get stored on the stack

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

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

   322     if (r_1->is_stack()) {

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

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

   325     } else {

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

   327     }

   328   }

   329 

   330   ce->align_call(lir_static_call);

   331 

   332   ce->emit_static_call_stub();

   333   if (ce->compilation()->bailed_out()) {

   334     return; // CodeCache is full

   335   }

   336   Address resolve(SharedRuntime::get_resolve_static_call_stub(),

   337                   relocInfo::static_call_type);

   338   address call = __ trampoline_call(resolve);

   339   if (call == NULL) {

   340     ce->bailout("trampoline stub overflow");

   341     return;

   342   }

   343   ce->add_call_info_here(info());

   344 

   345 #ifndef PRODUCT

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

   347   __ incrementw(Address(rscratch2));

   348 #endif

   349 

   350   __ b(_continuation);

   351 }

   352 

   353 

   354 /////////////////////////////////////////////////////////////////////////////

   355 #if INCLUDE_ALL_GCS

   356 

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

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

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

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

   361   // been loaded into _pre_val.

   362 

   363   __ bind(_entry);

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

   365 

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

   367 

   368   if (do_load()) {

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

   370   }

   371   __ cbz(pre_val_reg, _continuation);

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

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

   374   __ b(_continuation);

   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 __