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 "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 "nativeInst_aarch64.hpp"
34 #include "runtime/sharedRuntime.hpp"
35 #include "vmreg_aarch64.inline.hpp"
36
37
38 #define __ ce->masm()->
39
40 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
41 __ bind(_entry);
42 Metadata *m = _method->as_constant_ptr()->as_metadata();
43 __ mov_metadata(rscratch1, m);
44 ce->store_parameter(rscratch1, 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, LIR_Opr array)
53 : _index(index), _array(array), _throw_index_out_of_bounds_exception(false) {
54 assert(info != NULL, "must have info");
55 _info = new CodeEmitInfo(info);
56 }
57
58 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index)
59 : _index(index), _array(NULL), _throw_index_out_of_bounds_exception(true) {
60 assert(info != NULL, "must have info");
61 _info = new CodeEmitInfo(info);
62 }
63
64 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
65 __ bind(_entry);
66 if (_info->deoptimize_on_exception()) {
67 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
68 __ far_call(RuntimeAddress(a));
69 ce->add_call_info_here(_info);
70 ce->verify_oop_map(_info);
71 debug_only(__ should_not_reach_here());
72 return;
73 }
74
75 if (_index->is_cpu_register()) {
76 __ mov(rscratch1, _index->as_register());
77 } else {
78 __ mov(rscratch1, _index->as_jint());
79 }
80 Runtime1::StubID stub_id;
81 if (_throw_index_out_of_bounds_exception) {
82 stub_id = Runtime1::throw_index_exception_id;
83 } else {
84 assert(_array != NULL, "sanity");
85 __ mov(rscratch2, _array->as_pointer_register());
86 stub_id = Runtime1::throw_range_check_failed_id;
87 }
88 __ lea(lr, RuntimeAddress(Runtime1::entry_for(stub_id)));
89 __ blr(lr);
90 ce->add_call_info_here(_info);
91 ce->verify_oop_map(_info);
92 debug_only(__ should_not_reach_here());
93 }
94
95 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
96 _info = new CodeEmitInfo(info);
97 }
98
99 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
100 __ bind(_entry);
101 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
102 __ far_call(RuntimeAddress(a));
103 ce->add_call_info_here(_info);
104 ce->verify_oop_map(_info);
105 debug_only(__ should_not_reach_here());
106 }
107
108 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
109 if (_offset != -1) {
110 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
111 }
112 __ bind(_entry);
113 __ far_call(Address(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type));
114 ce->add_call_info_here(_info);
115 ce->verify_oop_map(_info);
116 #ifdef ASSERT
117 __ should_not_reach_here();
118 #endif
119 }
120
121 // Implementation of LoadFlattenedArrayStub
122
123 LoadFlattenedArrayStub::LoadFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) {
124 _array = array;
125 _index = index;
126 _result = result;
127 _info = new CodeEmitInfo(info);
128 }
129
130 void LoadFlattenedArrayStub::emit_code(LIR_Assembler* ce) {
131 assert(__ rsp_offset() == 0, "frame size should be fixed");
132 __ bind(_entry);
133 ce->store_parameter(_array->as_register(), 1);
134 ce->store_parameter(_index->as_register(), 0);
135 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::load_flattened_array_id)));
136 ce->add_call_info_here(_info);
137 ce->verify_oop_map(_info);
138 if (_result->as_register() != r0) { // DMS CHECK
139 __ mov(_result->as_register(), r0);
140 }
141 __ b(_continuation);
142 }
143
144
145 // Implementation of StoreFlattenedArrayStub
146
147 StoreFlattenedArrayStub::StoreFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr value, CodeEmitInfo* info) {
148 _array = array;
149 _index = index;
150 _value = value;
151 _info = new CodeEmitInfo(info);
152 }
153
154
155 void StoreFlattenedArrayStub::emit_code(LIR_Assembler* ce) {
156 assert(__ rsp_offset() == 0, "frame size should be fixed");
157 __ bind(_entry);
158 ce->store_parameter(_array->as_register(), 2);
159 ce->store_parameter(_index->as_register(), 1);
160 ce->store_parameter(_value->as_register(), 0);
161 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::store_flattened_array_id)));
162 ce->add_call_info_here(_info);
163 ce->verify_oop_map(_info);
164 __ b(_continuation);
165 }
166
167
168 // Implementation of NewInstanceStub
169
170 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
171 _result = result;
172 _klass = klass;
173 _klass_reg = klass_reg;
174 _info = new CodeEmitInfo(info);
175 assert(stub_id == Runtime1::new_instance_id ||
176 stub_id == Runtime1::fast_new_instance_id ||
177 stub_id == Runtime1::fast_new_instance_init_check_id,
178 "need new_instance id");
179 _stub_id = stub_id;
180 }
181
182 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
183 assert(__ rsp_offset() == 0, "frame size should be fixed");
184 __ bind(_entry);
185 __ mov(r3, _klass_reg->as_register());
186 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub_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
193
194 // Implementation of NewTypeArrayStub
195
196 // Implementation of NewTypeArrayStub
197
198 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
199 _klass_reg = klass_reg;
200 _length = length;
201 _result = result;
202 _info = new CodeEmitInfo(info);
203 }
204
205
206 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
207 assert(__ rsp_offset() == 0, "frame size should be fixed");
208 __ bind(_entry);
209 assert(_length->as_register() == r19, "length must in r19,");
210 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
211 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
212 ce->add_call_info_here(_info);
213 ce->verify_oop_map(_info);
214 assert(_result->as_register() == r0, "result must in r0");
215 __ b(_continuation);
216 }
217
218
219 // Implementation of NewObjectArrayStub
220
221 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info, bool is_value_type) {
222 _klass_reg = klass_reg;
223 _result = result;
224 _length = length;
225 _info = new CodeEmitInfo(info);
226 _is_value_type = is_value_type;
227 }
228
229
230 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
231 assert(__ rsp_offset() == 0, "frame size should be fixed");
232 __ bind(_entry);
233 assert(_length->as_register() == r19, "length must in r19,");
234 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
235
236 if (_is_value_type) {
237 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_value_array_id)));
238 } else {
239 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
240 }
241
242 ce->add_call_info_here(_info);
243 ce->verify_oop_map(_info);
244 assert(_result->as_register() == r0, "result must in r0");
245 __ b(_continuation);
246 }
247 // Implementation of MonitorAccessStubs
248
249 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info, CodeStub* throw_imse_stub, LIR_Opr scratch_reg)
250 : MonitorAccessStub(obj_reg, lock_reg)
251 {
252 _info = new CodeEmitInfo(info);
253 _scratch_reg = scratch_reg;
254 _throw_imse_stub = throw_imse_stub;
255 if (_throw_imse_stub != NULL) {
256 assert(_scratch_reg != LIR_OprFact::illegalOpr, "must be");
257 }
258 }
259
260
261 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
262 assert(__ rsp_offset() == 0, "frame size should be fixed");
263 __ bind(_entry);
264 if (_throw_imse_stub != NULL) {
265 // When we come here, _obj_reg has already been checked to be non-null.
266 Register mark = _scratch_reg->as_register();
267 __ ldr(mark, Address(_obj_reg->as_register(), oopDesc::mark_offset_in_bytes()));
268 __ andr(mark, mark, (u1) markOopDesc::always_locked_pattern && 0xF);
269 __ cmp(r2, (u1) markOopDesc::always_locked_pattern);
270 __ br(Assembler::NE, *_throw_imse_stub->entry());
271 }
272
273 ce->store_parameter(_obj_reg->as_register(), 1);
274 ce->store_parameter(_lock_reg->as_register(), 0);
275 Runtime1::StubID enter_id;
276 if (ce->compilation()->has_fpu_code()) {
277 enter_id = Runtime1::monitorenter_id;
278 } else {
279 enter_id = Runtime1::monitorenter_nofpu_id;
280 }
281 __ far_call(RuntimeAddress(Runtime1::entry_for(enter_id)));
282 ce->add_call_info_here(_info);
283 ce->verify_oop_map(_info);
284 __ b(_continuation);
285 }
286
287
288 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
289 __ bind(_entry);
290 if (_compute_lock) {
291 // lock_reg was destroyed by fast unlocking attempt => recompute it
292 ce->monitor_address(_monitor_ix, _lock_reg);
293 }
294 ce->store_parameter(_lock_reg->as_register(), 0);
295 // note: non-blocking leaf routine => no call info needed
296 Runtime1::StubID exit_id;
297 if (ce->compilation()->has_fpu_code()) {
298 exit_id = Runtime1::monitorexit_id;
299 } else {
300 exit_id = Runtime1::monitorexit_nofpu_id;
301 }
302 __ adr(lr, _continuation);
303 __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));
304 }
305
306
307 // Implementation of patching:
308 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
309 // - Replace original code with a call to the stub
310 // At Runtime:
311 // - call to stub, jump to runtime
312 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
313 // - in runtime: after initializing class, restore original code, reexecute instruction
314
315 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
316
317 void PatchingStub::align_patch_site(MacroAssembler* masm) {
318 }
319
320 void PatchingStub::emit_code(LIR_Assembler* ce) {
321 assert(false, "AArch64 should not use C1 runtime patching");
322 }
323
324
325 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
326 __ bind(_entry);
327 ce->store_parameter(_trap_request, 0);
328 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
329 ce->add_call_info_here(_info);
330 DEBUG_ONLY(__ should_not_reach_here());
331 }
332
333
334 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
335 address a;
336 if (_info->deoptimize_on_exception()) {
337 // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
338 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
339 } else {
340 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
341 }
342
343 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
344 __ bind(_entry);
345 __ far_call(RuntimeAddress(a));
346 ce->add_call_info_here(_info);
347 ce->verify_oop_map(_info);
348 debug_only(__ should_not_reach_here());
349 }
350
351
352 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
353 assert(__ rsp_offset() == 0, "frame size should be fixed");
354
355 __ bind(_entry);
356 // pass the object in a scratch register because all other registers
357 // must be preserved
358 if (_obj->is_cpu_register()) {
359 __ mov(rscratch1, _obj->as_register());
360 }
361 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub)), NULL, rscratch2);
362 ce->add_call_info_here(_info);
363 debug_only(__ should_not_reach_here());
364 }
365
366
367 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
368 //---------------slow case: call to native-----------------
369 __ bind(_entry);
370 // Figure out where the args should go
371 // This should really convert the IntrinsicID to the Method* and signature
372 // but I don't know how to do that.
373 //
374 VMRegPair args[5];
375 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
376 SharedRuntime::java_calling_convention(signature, args, 5, true);
377
378 // push parameters
379 // (src, src_pos, dest, destPos, length)
380 Register r[5];
381 r[0] = src()->as_register();
382 r[1] = src_pos()->as_register();
383 r[2] = dst()->as_register();
384 r[3] = dst_pos()->as_register();
385 r[4] = length()->as_register();
386
387 // next registers will get stored on the stack
388 for (int i = 0; i < 5 ; i++ ) {
389 VMReg r_1 = args[i].first();
390 if (r_1->is_stack()) {
391 int st_off = r_1->reg2stack() * wordSize;
392 __ str (r[i], Address(sp, st_off));
393 } else {
394 assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
395 }
396 }
397
398 ce->align_call(lir_static_call);
399
400 ce->emit_static_call_stub();
401 if (ce->compilation()->bailed_out()) {
402 return; // CodeCache is full
403 }
404 Address resolve(SharedRuntime::get_resolve_static_call_stub(),
405 relocInfo::static_call_type);
406 address call = __ trampoline_call(resolve);
407 if (call == NULL) {
408 ce->bailout("trampoline stub overflow");
409 return;
410 }
411 ce->add_call_info_here(info());
412
413 #ifndef PRODUCT
414 __ lea(rscratch2, ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
415 __ incrementw(Address(rscratch2));
416 #endif
417
418 __ b(_continuation);
419 }
420
421 #undef __