1 /*
2 * Copyright (c) 1999, 2020, 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/objectMonitor.hpp"
36 #include "runtime/sharedRuntime.hpp"
37 #include "vmreg_aarch64.inline.hpp"
38
39
40 #define __ ce->masm()->
41
42 void C1SafepointPollStub::emit_code(LIR_Assembler* ce) {
43 __ bind(_entry);
44 InternalAddress safepoint_pc(ce->masm()->pc() - ce->masm()->offset() + safepoint_offset());
45 __ adr(rscratch1, safepoint_pc);
46 __ str(rscratch1, Address(rthread, JavaThread::saved_exception_pc_offset()));
47
48 assert(SharedRuntime::polling_page_return_handler_blob() != NULL,
49 "polling page return stub not created yet");
50 address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point();
51
52 __ far_jump(RuntimeAddress(stub));
53 }
54
55 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
56 __ bind(_entry);
57 Metadata *m = _method->as_constant_ptr()->as_metadata();
58 __ mov_metadata(rscratch1, m);
59 ce->store_parameter(rscratch1, 1);
60 ce->store_parameter(_bci, 0);
61 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id)));
62 ce->add_call_info_here(_info);
63 ce->verify_oop_map(_info);
64 __ b(_continuation);
65 }
66
67 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, LIR_Opr array)
68 : _index(index), _array(array), _throw_index_out_of_bounds_exception(false) {
69 assert(info != NULL, "must have info");
70 _info = new CodeEmitInfo(info);
71 }
72
73 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index)
74 : _index(index), _array(NULL), _throw_index_out_of_bounds_exception(true) {
75 assert(info != NULL, "must have info");
76 _info = new CodeEmitInfo(info);
77 }
78
79 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
80 __ bind(_entry);
81 if (_info->deoptimize_on_exception()) {
82 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
83 __ far_call(RuntimeAddress(a));
84 ce->add_call_info_here(_info);
85 ce->verify_oop_map(_info);
86 debug_only(__ should_not_reach_here());
87 return;
88 }
89
90 if (_index->is_cpu_register()) {
91 __ mov(rscratch1, _index->as_register());
92 } else {
93 __ mov(rscratch1, _index->as_jint());
94 }
95 Runtime1::StubID stub_id;
96 if (_throw_index_out_of_bounds_exception) {
97 stub_id = Runtime1::throw_index_exception_id;
98 } else {
99 assert(_array != NULL, "sanity");
100 __ mov(rscratch2, _array->as_pointer_register());
101 stub_id = Runtime1::throw_range_check_failed_id;
102 }
103 __ lea(lr, RuntimeAddress(Runtime1::entry_for(stub_id)));
104 __ blr(lr);
105 ce->add_call_info_here(_info);
106 ce->verify_oop_map(_info);
107 debug_only(__ should_not_reach_here());
108 }
109
110 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
111 _info = new CodeEmitInfo(info);
112 }
113
114 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
115 __ bind(_entry);
116 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
117 __ far_call(RuntimeAddress(a));
118 ce->add_call_info_here(_info);
119 ce->verify_oop_map(_info);
120 debug_only(__ should_not_reach_here());
121 }
122
123 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
124 if (_offset != -1) {
125 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
126 }
127 __ bind(_entry);
128 __ far_call(Address(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type));
129 ce->add_call_info_here(_info);
130 ce->verify_oop_map(_info);
131 #ifdef ASSERT
132 __ should_not_reach_here();
133 #endif
134 }
135
136
137
138 // Implementation of NewInstanceStub
139
140 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
141 _result = result;
142 _klass = klass;
143 _klass_reg = klass_reg;
144 _info = new CodeEmitInfo(info);
145 assert(stub_id == Runtime1::new_instance_id ||
146 stub_id == Runtime1::fast_new_instance_id ||
147 stub_id == Runtime1::fast_new_instance_init_check_id,
148 "need new_instance id");
149 _stub_id = stub_id;
150 }
151
152
153
154 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
155 assert(__ rsp_offset() == 0, "frame size should be fixed");
156 __ bind(_entry);
157 __ mov(r3, _klass_reg->as_register());
158 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
159 ce->add_call_info_here(_info);
160 ce->verify_oop_map(_info);
161 assert(_result->as_register() == r0, "result must in r0,");
162 __ b(_continuation);
163 }
164
165
166 // Implementation of NewTypeArrayStub
167
168 // Implementation of NewTypeArrayStub
169
170 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
171 _klass_reg = klass_reg;
172 _length = length;
173 _result = result;
174 _info = new CodeEmitInfo(info);
175 }
176
177
178 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
179 assert(__ rsp_offset() == 0, "frame size should be fixed");
180 __ bind(_entry);
181 assert(_length->as_register() == r19, "length must in r19,");
182 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
183 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
184 ce->add_call_info_here(_info);
185 ce->verify_oop_map(_info);
186 assert(_result->as_register() == r0, "result must in r0");
187 __ b(_continuation);
188 }
189
190
191 // Implementation of NewObjectArrayStub
192
193 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
194 _klass_reg = klass_reg;
195 _result = result;
196 _length = length;
197 _info = new CodeEmitInfo(info);
198 }
199
200
201 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
202 assert(__ rsp_offset() == 0, "frame size should be fixed");
203 __ bind(_entry);
204 assert(_length->as_register() == r19, "length must in r19,");
205 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
206 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
207 ce->add_call_info_here(_info);
208 ce->verify_oop_map(_info);
209 assert(_result->as_register() == r0, "result must in r0");
210 __ b(_continuation);
211 }
212 // Implementation of MonitorAccessStubs
213
214 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
215 : MonitorAccessStub(obj_reg, lock_reg)
216 {
217 _info = new CodeEmitInfo(info);
218 }
219
220
221 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
222 assert(__ rsp_offset() == 0, "frame size should be fixed");
223 __ bind(_entry);
224 ce->store_parameter(_obj_reg->as_register(), 1);
225 ce->store_parameter(_lock_reg->as_register(), 0);
226 Runtime1::StubID enter_id;
227 if (ce->compilation()->has_fpu_code()) {
228 enter_id = Runtime1::monitorenter_id;
229 } else {
230 enter_id = Runtime1::monitorenter_nofpu_id;
231 }
232 __ far_call(RuntimeAddress(Runtime1::entry_for(enter_id)));
233 ce->add_call_info_here(_info);
234 ce->verify_oop_map(_info);
235 __ b(_continuation);
236 }
237
238
239 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
240 __ bind(_entry);
241 if (_compute_lock) {
242 // lock_reg was destroyed by fast unlocking attempt => recompute it
243 ce->monitor_address(_monitor_ix, _lock_reg);
244 }
245 ce->store_parameter(_lock_reg->as_register(), 0);
246 // note: non-blocking leaf routine => no call info needed
247 Runtime1::StubID exit_id;
248 if (ce->compilation()->has_fpu_code()) {
249 exit_id = Runtime1::monitorexit_id;
250 } else {
251 exit_id = Runtime1::monitorexit_nofpu_id;
252 }
253 __ adr(lr, _continuation);
254 __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));
255 }
256
257 void LoadKlassStub::emit_code(LIR_Assembler* ce) {
258 assert(UseCompactObjectHeaders, "Only use with compact object headers");
259 __ bind(_entry);
260 Register d = _result->as_register();
261 __ ldr(d, Address(d, OM_OFFSET_NO_MONITOR_VALUE_TAG(header)));
262 __ b(_continuation);
263 }
264
265 // Implementation of patching:
266 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
267 // - Replace original code with a call to the stub
268 // At Runtime:
269 // - call to stub, jump to runtime
270 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
271 // - in runtime: after initializing class, restore original code, reexecute instruction
272
273 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
274
275 void PatchingStub::align_patch_site(MacroAssembler* masm) {
276 }
277
278 void PatchingStub::emit_code(LIR_Assembler* ce) {
279 assert(false, "AArch64 should not use C1 runtime patching");
280 }
281
282
283 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
284 __ bind(_entry);
285 ce->store_parameter(_trap_request, 0);
286 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
287 ce->add_call_info_here(_info);
288 DEBUG_ONLY(__ should_not_reach_here());
289 }
290
291
292 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
293 address a;
294 if (_info->deoptimize_on_exception()) {
295 // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
296 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
297 } else {
298 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
299 }
300
301 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
302 __ bind(_entry);
303 __ far_call(RuntimeAddress(a));
304 ce->add_call_info_here(_info);
305 ce->verify_oop_map(_info);
306 debug_only(__ should_not_reach_here());
307 }
308
309
310 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
311 assert(__ rsp_offset() == 0, "frame size should be fixed");
312
313 __ bind(_entry);
314 // pass the object in a scratch register because all other registers
315 // must be preserved
316 if (_obj->is_cpu_register()) {
317 __ mov(rscratch1, _obj->as_register());
318 }
319 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub)), NULL, rscratch2);
320 ce->add_call_info_here(_info);
321 debug_only(__ should_not_reach_here());
322 }
323
324
325 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
326 //---------------slow case: call to native-----------------
327 __ bind(_entry);
328 // Figure out where the args should go
329 // This should really convert the IntrinsicID to the Method* and signature
330 // but I don't know how to do that.
331 //
332 VMRegPair args[5];
333 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
334 SharedRuntime::java_calling_convention(signature, args, 5);
335
336 // push parameters
337 // (src, src_pos, dest, destPos, length)
338 Register r[5];
339 r[0] = src()->as_register();
340 r[1] = src_pos()->as_register();
341 r[2] = dst()->as_register();
342 r[3] = dst_pos()->as_register();
343 r[4] = length()->as_register();
344
345 // next registers will get stored on the stack
346 for (int i = 0; i < 5 ; i++ ) {
347 VMReg r_1 = args[i].first();
348 if (r_1->is_stack()) {
349 int st_off = r_1->reg2stack() * wordSize;
350 __ str (r[i], Address(sp, st_off));
351 } else {
352 assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
353 }
354 }
355
356 ce->align_call(lir_static_call);
357
358 ce->emit_static_call_stub();
359 if (ce->compilation()->bailed_out()) {
360 return; // CodeCache is full
361 }
362 Address resolve(SharedRuntime::get_resolve_static_call_stub(),
363 relocInfo::static_call_type);
364 address call = __ trampoline_call(resolve);
365 if (call == NULL) {
366 ce->bailout("trampoline stub overflow");
367 return;
368 }
369 ce->add_call_info_here(info());
370
371 #ifndef PRODUCT
372 __ lea(rscratch2, ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
373 __ incrementw(Address(rscratch2));
374 #endif
375
376 __ b(_continuation);
377 }
378
379 #undef __