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