1 /*
2 * Copyright (c) 1999, 2018, 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/g1BarrierSet.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, LIR_Opr array)
55 : _throw_index_out_of_bounds_exception(false), _index(index), _array(array) {
56 assert(info != NULL, "must have info");
57 _info = new CodeEmitInfo(info);
58 }
59
60 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index)
61 : _throw_index_out_of_bounds_exception(true), _index(index), _array(NULL) {
62 assert(info != NULL, "must have info");
63 _info = new CodeEmitInfo(info);
64 }
65
66 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
67 __ bind(_entry);
68 if (_info->deoptimize_on_exception()) {
69 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
70 __ far_call(RuntimeAddress(a));
71 ce->add_call_info_here(_info);
72 ce->verify_oop_map(_info);
73 debug_only(__ should_not_reach_here());
74 return;
75 }
76
77 if (_index->is_cpu_register()) {
78 __ mov(r22, _index->as_register());
79 } else {
80 __ mov(r22, _index->as_jint());
81 }
82 Runtime1::StubID stub_id;
83 if (_throw_index_out_of_bounds_exception) {
84 stub_id = Runtime1::throw_index_exception_id;
85 } else {
86 assert(_array != NULL, "sanity");
87 __ mov(r23, _array->as_pointer_register());
88 stub_id = Runtime1::throw_range_check_failed_id;
89 }
90 __ far_call(RuntimeAddress(Runtime1::entry_for(stub_id)), NULL, rscratch2);
91 ce->add_call_info_here(_info);
92 ce->verify_oop_map(_info);
93 debug_only(__ should_not_reach_here());
94 }
95
96 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
97 _info = new CodeEmitInfo(info);
98 }
99
100 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
101 __ bind(_entry);
102 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
103 __ far_call(RuntimeAddress(a));
104 ce->add_call_info_here(_info);
105 ce->verify_oop_map(_info);
106 debug_only(__ should_not_reach_here());
107 }
108
109 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
110 if (_offset != -1) {
111 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
112 }
113 __ bind(_entry);
114 __ far_call(Address(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type));
115 ce->add_call_info_here(_info);
116 ce->verify_oop_map(_info);
117 #ifdef ASSERT
118 __ should_not_reach_here();
119 #endif
120 }
121
122
123
124 // Implementation of NewInstanceStub
125
126 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
127 _result = result;
128 _klass = klass;
129 _klass_reg = klass_reg;
130 _info = new CodeEmitInfo(info);
131 assert(stub_id == Runtime1::new_instance_id ||
132 stub_id == Runtime1::fast_new_instance_id ||
133 stub_id == Runtime1::fast_new_instance_init_check_id,
134 "need new_instance id");
135 _stub_id = stub_id;
136 }
137
138
139
140 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
141 assert(__ rsp_offset() == 0, "frame size should be fixed");
142 __ bind(_entry);
143 __ mov(r3, _klass_reg->as_register());
144 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
145 ce->add_call_info_here(_info);
146 ce->verify_oop_map(_info);
147 assert(_result->as_register() == r0, "result must in r0,");
148 __ b(_continuation);
149 }
150
151
152 // Implementation of NewTypeArrayStub
153
154 // Implementation of NewTypeArrayStub
155
156 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
157 _klass_reg = klass_reg;
158 _length = length;
159 _result = result;
160 _info = new CodeEmitInfo(info);
161 }
162
163
164 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
165 assert(__ rsp_offset() == 0, "frame size should be fixed");
166 __ bind(_entry);
167 assert(_length->as_register() == r19, "length must in r19,");
168 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
169 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
170 ce->add_call_info_here(_info);
171 ce->verify_oop_map(_info);
172 assert(_result->as_register() == r0, "result must in r0");
173 __ b(_continuation);
174 }
175
176
177 // Implementation of NewObjectArrayStub
178
179 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
180 _klass_reg = klass_reg;
181 _result = result;
182 _length = length;
183 _info = new CodeEmitInfo(info);
184 }
185
186
187 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
188 assert(__ rsp_offset() == 0, "frame size should be fixed");
189 __ bind(_entry);
190 assert(_length->as_register() == r19, "length must in r19,");
191 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
192 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
193 ce->add_call_info_here(_info);
194 ce->verify_oop_map(_info);
195 assert(_result->as_register() == r0, "result must in r0");
196 __ b(_continuation);
197 }
198 // Implementation of MonitorAccessStubs
199
200 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
201 : MonitorAccessStub(obj_reg, lock_reg)
202 {
203 _info = new CodeEmitInfo(info);
204 }
205
206
207 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
208 assert(__ rsp_offset() == 0, "frame size should be fixed");
209 __ bind(_entry);
210 ce->store_parameter(_obj_reg->as_register(), 1);
211 ce->store_parameter(_lock_reg->as_register(), 0);
212 Runtime1::StubID enter_id;
213 if (ce->compilation()->has_fpu_code()) {
214 enter_id = Runtime1::monitorenter_id;
215 } else {
216 enter_id = Runtime1::monitorenter_nofpu_id;
217 }
218 __ far_call(RuntimeAddress(Runtime1::entry_for(enter_id)));
219 ce->add_call_info_here(_info);
220 ce->verify_oop_map(_info);
221 __ b(_continuation);
222 }
223
224
225 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
226 __ bind(_entry);
227 if (_compute_lock) {
228 // lock_reg was destroyed by fast unlocking attempt => recompute it
229 ce->monitor_address(_monitor_ix, _lock_reg);
230 }
231 ce->store_parameter(_lock_reg->as_register(), 0);
232 // note: non-blocking leaf routine => no call info needed
233 Runtime1::StubID exit_id;
234 if (ce->compilation()->has_fpu_code()) {
235 exit_id = Runtime1::monitorexit_id;
236 } else {
237 exit_id = Runtime1::monitorexit_nofpu_id;
238 }
239 __ adr(lr, _continuation);
240 __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));
241 }
242
243
244 // Implementation of patching:
245 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
246 // - Replace original code with a call to the stub
247 // At Runtime:
248 // - call to stub, jump to runtime
249 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
250 // - in runtime: after initializing class, restore original code, reexecute instruction
251
252 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
253
254 void PatchingStub::align_patch_site(MacroAssembler* masm) {
255 }
256
257 void PatchingStub::emit_code(LIR_Assembler* ce) {
258 assert(false, "AArch64 should not use C1 runtime patching");
259 }
260
261
262 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
263 __ bind(_entry);
264 ce->store_parameter(_trap_request, 0);
265 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
266 ce->add_call_info_here(_info);
267 DEBUG_ONLY(__ should_not_reach_here());
268 }
269
270
271 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
272 address a;
273 if (_info->deoptimize_on_exception()) {
274 // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
275 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
276 } else {
277 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
278 }
279
280 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
281 __ bind(_entry);
282 __ far_call(RuntimeAddress(a));
283 ce->add_call_info_here(_info);
284 ce->verify_oop_map(_info);
285 debug_only(__ should_not_reach_here());
286 }
287
288
289 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
290 assert(__ rsp_offset() == 0, "frame size should be fixed");
291
292 __ bind(_entry);
293 // pass the object in a scratch register because all other registers
294 // must be preserved
295 if (_obj->is_cpu_register()) {
296 __ mov(rscratch1, _obj->as_register());
297 }
298 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub)), NULL, rscratch2);
299 ce->add_call_info_here(_info);
300 debug_only(__ should_not_reach_here());
301 }
302
303
304 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
305 //---------------slow case: call to native-----------------
306 __ bind(_entry);
307 // Figure out where the args should go
308 // This should really convert the IntrinsicID to the Method* and signature
309 // but I don't know how to do that.
310 //
311 VMRegPair args[5];
312 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
313 SharedRuntime::java_calling_convention(signature, args, 5, true);
314
315 // push parameters
316 // (src, src_pos, dest, destPos, length)
317 Register r[5];
318 r[0] = src()->as_register();
319 r[1] = src_pos()->as_register();
320 r[2] = dst()->as_register();
321 r[3] = dst_pos()->as_register();
322 r[4] = length()->as_register();
323
324 // next registers will get stored on the stack
325 for (int i = 0; i < 5 ; i++ ) {
326 VMReg r_1 = args[i].first();
327 if (r_1->is_stack()) {
328 int st_off = r_1->reg2stack() * wordSize;
329 __ str (r[i], Address(sp, st_off));
330 } else {
331 assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
332 }
333 }
334
335 ce->align_call(lir_static_call);
336
337 ce->emit_static_call_stub();
338 if (ce->compilation()->bailed_out()) {
339 return; // CodeCache is full
340 }
341 Address resolve(SharedRuntime::get_resolve_static_call_stub(),
342 relocInfo::static_call_type);
343 address call = __ trampoline_call(resolve);
344 if (call == NULL) {
345 ce->bailout("trampoline stub overflow");
346 return;
347 }
348 ce->add_call_info_here(info());
349
350 #ifndef PRODUCT
351 __ lea(rscratch2, ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
352 __ incrementw(Address(rscratch2));
353 #endif
354
355 __ b(_continuation);
356 }
357
358
359 /////////////////////////////////////////////////////////////////////////////
360 #if INCLUDE_ALL_GCS
361
362 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
363 // At this point we know that marking is in progress.
364 // If do_load() is true then we have to emit the
365 // load of the previous value; otherwise it has already
366 // been loaded into _pre_val.
367
368 __ bind(_entry);
369 assert(pre_val()->is_register(), "Precondition.");
370
371 Register pre_val_reg = pre_val()->as_register();
372
373 if (do_load()) {
374 ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/);
375 }
376 __ cbz(pre_val_reg, _continuation);
377 ce->store_parameter(pre_val()->as_register(), 0);
378 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_pre_barrier_slow_id)));
379 __ b(_continuation);
380 }
381
382 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
383 __ bind(_entry);
384 assert(addr()->is_register(), "Precondition.");
385 assert(new_val()->is_register(), "Precondition.");
386 Register new_val_reg = new_val()->as_register();
387 __ cbz(new_val_reg, _continuation);
388 ce->store_parameter(addr()->as_pointer_register(), 0);
389 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_post_barrier_slow_id)));
390 __ b(_continuation);
391 }
392
393 #endif // INCLUDE_ALL_GCS
394 /////////////////////////////////////////////////////////////////////////////
395
396 #undef __