1 /*
2 * Copyright (c) 1999, 2021, 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 "asm/macroAssembler.inline.hpp"
28 #include "c1/c1_CodeStubs.hpp"
29 #include "c1/c1_FrameMap.hpp"
30 #include "c1/c1_LIRAssembler.hpp"
31 #include "c1/c1_MacroAssembler.hpp"
32 #include "c1/c1_Runtime1.hpp"
33 #include "classfile/javaClasses.hpp"
34 #include "nativeInst_aarch64.hpp"
35 #include "runtime/sharedRuntime.hpp"
36 #include "vmreg_aarch64.inline.hpp"
37
38
39 #define __ ce->masm()->
40
41 void C1SafepointPollStub::emit_code(LIR_Assembler* ce) {
42 __ bind(_entry);
43 InternalAddress safepoint_pc(ce->masm()->pc() - ce->masm()->offset() + safepoint_offset());
44 __ adr(rscratch1, safepoint_pc);
45 __ str(rscratch1, Address(rthread, JavaThread::saved_exception_pc_offset()));
46
47 assert(SharedRuntime::polling_page_return_handler_blob() != NULL,
48 "polling page return stub not created yet");
49 address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point();
50
51 __ far_jump(RuntimeAddress(stub));
52 }
53
54 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
55 __ bind(_entry);
56 Metadata *m = _method->as_constant_ptr()->as_metadata();
57 __ mov_metadata(rscratch1, m);
58 ce->store_parameter(rscratch1, 1);
59 ce->store_parameter(_bci, 0);
60 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id)));
61 ce->add_call_info_here(_info);
62 ce->verify_oop_map(_info);
63 __ b(_continuation);
64 }
65
66 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, LIR_Opr array)
67 : _index(index), _array(array), _throw_index_out_of_bounds_exception(false) {
68 assert(info != NULL, "must have info");
69 _info = new CodeEmitInfo(info);
70 }
71
72 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index)
73 : _index(index), _array(), _throw_index_out_of_bounds_exception(true) {
74 assert(info != NULL, "must have info");
75 _info = new CodeEmitInfo(info);
76 }
77
78 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
79 __ bind(_entry);
80 if (_info->deoptimize_on_exception()) {
81 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
82 __ far_call(RuntimeAddress(a));
83 ce->add_call_info_here(_info);
84 ce->verify_oop_map(_info);
85 debug_only(__ should_not_reach_here());
86 return;
87 }
88
89 if (_index->is_cpu_register()) {
90 __ mov(rscratch1, _index->as_register());
91 } else {
92 __ mov(rscratch1, _index->as_jint());
93 }
94 Runtime1::StubID stub_id;
95 if (_throw_index_out_of_bounds_exception) {
96 stub_id = Runtime1::throw_index_exception_id;
97 } else {
98 assert(_array != LIR_Opr::nullOpr(), "sanity");
99 __ mov(rscratch2, _array->as_pointer_register());
100 stub_id = Runtime1::throw_range_check_failed_id;
101 }
102 __ lea(lr, RuntimeAddress(Runtime1::entry_for(stub_id)));
103 __ blr(lr);
104 ce->add_call_info_here(_info);
105 ce->verify_oop_map(_info);
106 debug_only(__ should_not_reach_here());
107 }
108
109 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
110 _info = new CodeEmitInfo(info);
111 }
112
113 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
114 __ bind(_entry);
115 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
116 __ far_call(RuntimeAddress(a));
117 ce->add_call_info_here(_info);
118 ce->verify_oop_map(_info);
119 debug_only(__ should_not_reach_here());
120 }
121
122 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
123 if (_offset != -1) {
124 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
125 }
126 __ bind(_entry);
127 __ far_call(Address(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type));
128 ce->add_call_info_here(_info);
129 ce->verify_oop_map(_info);
130 #ifdef ASSERT
131 __ should_not_reach_here();
132 #endif
133 }
134
135 // Implementation of LoadFlattenedArrayStub
136
137 LoadFlattenedArrayStub::LoadFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) {
138 _array = array;
139 _index = index;
140 _result = result;
141 _scratch_reg = FrameMap::r0_oop_opr;
142 _info = new CodeEmitInfo(info);
143 }
144
145 void LoadFlattenedArrayStub::emit_code(LIR_Assembler* ce) {
146 assert(__ rsp_offset() == 0, "frame size should be fixed");
147 __ bind(_entry);
148 ce->store_parameter(_array->as_register(), 1);
149 ce->store_parameter(_index->as_register(), 0);
150 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::load_flattened_array_id)));
151 ce->add_call_info_here(_info);
152 ce->verify_oop_map(_info);
153 if (_result->as_register() != r0) {
154 __ mov(_result->as_register(), r0);
155 }
156 __ b(_continuation);
157 }
158
159
160 // Implementation of StoreFlattenedArrayStub
161
162 StoreFlattenedArrayStub::StoreFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr value, CodeEmitInfo* info) {
163 _array = array;
164 _index = index;
165 _value = value;
166 _scratch_reg = FrameMap::r0_oop_opr;
167 _info = new CodeEmitInfo(info);
168 }
169
170
171 void StoreFlattenedArrayStub::emit_code(LIR_Assembler* ce) {
172 assert(__ rsp_offset() == 0, "frame size should be fixed");
173 __ bind(_entry);
174 ce->store_parameter(_array->as_register(), 2);
175 ce->store_parameter(_index->as_register(), 1);
176 ce->store_parameter(_value->as_register(), 0);
177 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::store_flattened_array_id)));
178 ce->add_call_info_here(_info);
179 ce->verify_oop_map(_info);
180 __ b(_continuation);
181 }
182
183 // Implementation of SubstitutabilityCheckStub
184 SubstitutabilityCheckStub::SubstitutabilityCheckStub(LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) {
185 _left = left;
186 _right = right;
187 _scratch_reg = FrameMap::r0_oop_opr;
188 _info = new CodeEmitInfo(info);
189 }
190
191 void SubstitutabilityCheckStub::emit_code(LIR_Assembler* ce) {
192 assert(__ rsp_offset() == 0, "frame size should be fixed");
193 __ bind(_entry);
194 ce->store_parameter(_left->as_register(), 1);
195 ce->store_parameter(_right->as_register(), 0);
196 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::substitutability_check_id)));
197 ce->add_call_info_here(_info);
198 ce->verify_oop_map(_info);
199 __ b(_continuation);
200 }
201
202
203 // Implementation of NewInstanceStub
204
205 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
206 _result = result;
207 _klass = klass;
208 _klass_reg = klass_reg;
209 _info = new CodeEmitInfo(info);
210 assert(stub_id == Runtime1::new_instance_id ||
211 stub_id == Runtime1::new_instance_no_inline_id ||
212 stub_id == Runtime1::fast_new_instance_id ||
213 stub_id == Runtime1::fast_new_instance_init_check_id,
214 "need new_instance id");
215 _stub_id = stub_id;
216 }
217
218 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
219 assert(__ rsp_offset() == 0, "frame size should be fixed");
220 __ bind(_entry);
221 __ mov(r3, _klass_reg->as_register());
222 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
223 ce->add_call_info_here(_info);
224 ce->verify_oop_map(_info);
225 assert(_result->as_register() == r0, "result must in r0,");
226 __ b(_continuation);
227 }
228
229
230 // Implementation of NewTypeArrayStub
231
232 // Implementation of NewTypeArrayStub
233
234 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
235 _klass_reg = klass_reg;
236 _length = length;
237 _result = result;
238 _info = new CodeEmitInfo(info);
239 }
240
241
242 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
243 assert(__ rsp_offset() == 0, "frame size should be fixed");
244 __ bind(_entry);
245 assert(_length->as_register() == r19, "length must in r19,");
246 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
247 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
248 ce->add_call_info_here(_info);
249 ce->verify_oop_map(_info);
250 assert(_result->as_register() == r0, "result must in r0");
251 __ b(_continuation);
252 }
253
254
255 // Implementation of NewObjectArrayStub
256
257 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result,
258 CodeEmitInfo* info, bool is_null_free) {
259 _klass_reg = klass_reg;
260 _result = result;
261 _length = length;
262 _info = new CodeEmitInfo(info);
263 _is_null_free = is_null_free;
264 }
265
266
267 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
268 assert(__ rsp_offset() == 0, "frame size should be fixed");
269 __ bind(_entry);
270 assert(_length->as_register() == r19, "length must in r19,");
271 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
272
273 if (_is_null_free) {
274 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_flat_array_id)));
275 } else {
276 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
277 }
278
279 ce->add_call_info_here(_info);
280 ce->verify_oop_map(_info);
281 assert(_result->as_register() == r0, "result must in r0");
282 __ b(_continuation);
283 }
284 // Implementation of MonitorAccessStubs
285
286 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info, CodeStub* throw_imse_stub, LIR_Opr scratch_reg)
287 : MonitorAccessStub(obj_reg, lock_reg)
288 {
289 _info = new CodeEmitInfo(info);
290 _scratch_reg = scratch_reg;
291 _throw_imse_stub = throw_imse_stub;
292 if (_throw_imse_stub != NULL) {
293 assert(_scratch_reg != LIR_OprFact::illegalOpr, "must be");
294 }
295 }
296
297
298 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
299 assert(__ rsp_offset() == 0, "frame size should be fixed");
300 __ bind(_entry);
301 if (_throw_imse_stub != NULL) {
302 // When we come here, _obj_reg has already been checked to be non-null.
303 __ ldr(rscratch1, Address(_obj_reg->as_register(), oopDesc::mark_offset_in_bytes()));
304 __ mov(rscratch2, markWord::inline_type_pattern);
305 __ andr(rscratch1, rscratch1, rscratch2);
306
307 __ cmp(rscratch1, rscratch2);
308 __ br(Assembler::EQ, *_throw_imse_stub->entry());
309 }
310
311 ce->store_parameter(_obj_reg->as_register(), 1);
312 ce->store_parameter(_lock_reg->as_register(), 0);
313 Runtime1::StubID enter_id;
314 if (ce->compilation()->has_fpu_code()) {
315 enter_id = Runtime1::monitorenter_id;
316 } else {
317 enter_id = Runtime1::monitorenter_nofpu_id;
318 }
319 __ far_call(RuntimeAddress(Runtime1::entry_for(enter_id)));
320 ce->add_call_info_here(_info);
321 ce->verify_oop_map(_info);
322 __ b(_continuation);
323 }
324
325
326 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
327 __ bind(_entry);
328 if (_compute_lock) {
329 // lock_reg was destroyed by fast unlocking attempt => recompute it
330 ce->monitor_address(_monitor_ix, _lock_reg);
331 }
332 ce->store_parameter(_lock_reg->as_register(), 0);
333 // note: non-blocking leaf routine => no call info needed
334 Runtime1::StubID exit_id;
335 if (ce->compilation()->has_fpu_code()) {
336 exit_id = Runtime1::monitorexit_id;
337 } else {
338 exit_id = Runtime1::monitorexit_nofpu_id;
339 }
340 __ adr(lr, _continuation);
341 __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));
342 }
343
344
345 // Implementation of patching:
346 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
347 // - Replace original code with a call to the stub
348 // At Runtime:
349 // - call to stub, jump to runtime
350 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
351 // - in runtime: after initializing class, restore original code, reexecute instruction
352
353 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
354
355 void PatchingStub::align_patch_site(MacroAssembler* masm) {
356 }
357
358 void PatchingStub::emit_code(LIR_Assembler* ce) {
359 assert(false, "AArch64 should not use C1 runtime patching");
360 }
361
362
363 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
364 __ bind(_entry);
365 ce->store_parameter(_trap_request, 0);
366 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
367 ce->add_call_info_here(_info);
368 DEBUG_ONLY(__ should_not_reach_here());
369 }
370
371
372 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
373 address a;
374 if (_info->deoptimize_on_exception()) {
375 // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
376 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
377 } else {
378 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
379 }
380
381 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
382 __ bind(_entry);
383 __ far_call(RuntimeAddress(a));
384 ce->add_call_info_here(_info);
385 ce->verify_oop_map(_info);
386 debug_only(__ should_not_reach_here());
387 }
388
389
390 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
391 assert(__ rsp_offset() == 0, "frame size should be fixed");
392
393 __ bind(_entry);
394 // pass the object in a scratch register because all other registers
395 // must be preserved
396 if (_obj->is_cpu_register()) {
397 __ mov(rscratch1, _obj->as_register());
398 }
399 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub)), NULL, rscratch2);
400 ce->add_call_info_here(_info);
401 debug_only(__ should_not_reach_here());
402 }
403
404
405 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
406 //---------------slow case: call to native-----------------
407 __ bind(_entry);
408 // Figure out where the args should go
409 // This should really convert the IntrinsicID to the Method* and signature
410 // but I don't know how to do that.
411 //
412 VMRegPair args[5];
413 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
414 SharedRuntime::java_calling_convention(signature, args, 5);
415
416 // push parameters
417 // (src, src_pos, dest, destPos, length)
418 Register r[5];
419 r[0] = src()->as_register();
420 r[1] = src_pos()->as_register();
421 r[2] = dst()->as_register();
422 r[3] = dst_pos()->as_register();
423 r[4] = length()->as_register();
424
425 // next registers will get stored on the stack
426 for (int i = 0; i < 5 ; i++ ) {
427 VMReg r_1 = args[i].first();
428 if (r_1->is_stack()) {
429 int st_off = r_1->reg2stack() * wordSize;
430 __ str (r[i], Address(sp, st_off));
431 } else {
432 assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
433 }
434 }
435
436 ce->align_call(lir_static_call);
437
438 ce->emit_static_call_stub();
439 if (ce->compilation()->bailed_out()) {
440 return; // CodeCache is full
441 }
442 Address resolve(SharedRuntime::get_resolve_static_call_stub(),
443 relocInfo::static_call_type);
444 address call = __ trampoline_call(resolve);
445 if (call == NULL) {
446 ce->bailout("trampoline stub overflow");
447 return;
448 }
449 ce->add_call_info_here(info());
450
451 #ifndef PRODUCT
452 if (PrintC1Statistics) {
453 __ lea(rscratch2, ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
454 __ incrementw(Address(rscratch2));
455 }
456 #endif
457
458 __ b(_continuation);
459 }
460
461 #undef __