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