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
122
123 // Implementation of NewInstanceStub
124
125 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
126 _result = result;
127 _klass = klass;
128 _klass_reg = klass_reg;
129 _info = new CodeEmitInfo(info);
130 assert(stub_id == Runtime1::new_instance_id ||
131 stub_id == Runtime1::fast_new_instance_id ||
132 stub_id == Runtime1::fast_new_instance_init_check_id,
133 "need new_instance id");
134 _stub_id = stub_id;
135 }
136
137
138
139 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
140 assert(__ rsp_offset() == 0, "frame size should be fixed");
141 __ bind(_entry);
142 __ mov(r3, _klass_reg->as_register());
143 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
144 ce->add_call_info_here(_info);
145 ce->verify_oop_map(_info);
146 assert(_result->as_register() == r0, "result must in r0,");
147 __ b(_continuation);
148 }
149
150
151 // Implementation of NewTypeArrayStub
152
153 // Implementation of NewTypeArrayStub
154
155 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
156 _klass_reg = klass_reg;
157 _length = length;
158 _result = result;
159 _info = new CodeEmitInfo(info);
160 }
161
162
163 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
164 assert(__ rsp_offset() == 0, "frame size should be fixed");
165 __ bind(_entry);
166 assert(_length->as_register() == r19, "length must in r19,");
167 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
168 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
169 ce->add_call_info_here(_info);
170 ce->verify_oop_map(_info);
171 assert(_result->as_register() == r0, "result must in r0");
172 __ b(_continuation);
173 }
174
175
176 // Implementation of NewObjectArrayStub
177
178 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info, bool is_value_type) {
179 _klass_reg = klass_reg;
180 _result = result;
181 _length = length;
182 _info = new CodeEmitInfo(info);
183 _is_value_type = is_value_type;
184 }
185
186
187 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
188 assert(__ rsp_offset() == 0, "frame size should be fixed");
189 __ bind(_entry);
190 assert(_length->as_register() == r19, "length must in r19,");
191 assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
192
193 if (_is_value_type) {
194 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_value_array_id)));
195 } else {
196 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
197 }
198
199 ce->add_call_info_here(_info);
200 ce->verify_oop_map(_info);
201 assert(_result->as_register() == r0, "result must in r0");
202 __ b(_continuation);
203 }
204 // Implementation of MonitorAccessStubs
205
206 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info, CodeStub* throw_imse_stub, LIR_Opr scratch_reg)
207 : MonitorAccessStub(obj_reg, lock_reg)
208 {
209 _info = new CodeEmitInfo(info);
210 _scratch_reg = scratch_reg;
211 _throw_imse_stub = throw_imse_stub;
212 if (_throw_imse_stub != NULL) {
213 assert(_scratch_reg != LIR_OprFact::illegalOpr, "must be");
214 }
215 }
216
217
218 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
219 assert(__ rsp_offset() == 0, "frame size should be fixed");
220 __ bind(_entry);
221 if (_throw_imse_stub != NULL) {
222 // When we come here, _obj_reg has already been checked to be non-null.
223 Register mark = _scratch_reg->as_register();
224 __ ldr(mark, Address(_obj_reg->as_register(), oopDesc::mark_offset_in_bytes()));
225 __ andr(mark, mark, (u1) markOopDesc::always_locked_pattern && 0xF);
226 __ cmp(r2, (u1) markOopDesc::always_locked_pattern);
227 __ br(Assembler::NE, *_throw_imse_stub->entry());
228 }
229
230 ce->store_parameter(_obj_reg->as_register(), 1);
231 ce->store_parameter(_lock_reg->as_register(), 0);
232 Runtime1::StubID enter_id;
233 if (ce->compilation()->has_fpu_code()) {
234 enter_id = Runtime1::monitorenter_id;
235 } else {
236 enter_id = Runtime1::monitorenter_nofpu_id;
237 }
238 __ far_call(RuntimeAddress(Runtime1::entry_for(enter_id)));
239 ce->add_call_info_here(_info);
240 ce->verify_oop_map(_info);
241 __ b(_continuation);
242 }
243
244
245 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
246 __ bind(_entry);
247 if (_compute_lock) {
248 // lock_reg was destroyed by fast unlocking attempt => recompute it
249 ce->monitor_address(_monitor_ix, _lock_reg);
250 }
251 ce->store_parameter(_lock_reg->as_register(), 0);
252 // note: non-blocking leaf routine => no call info needed
253 Runtime1::StubID exit_id;
254 if (ce->compilation()->has_fpu_code()) {
255 exit_id = Runtime1::monitorexit_id;
256 } else {
257 exit_id = Runtime1::monitorexit_nofpu_id;
258 }
259 __ adr(lr, _continuation);
260 __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));
261 }
262
263
264 // Implementation of patching:
265 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
266 // - Replace original code with a call to the stub
267 // At Runtime:
268 // - call to stub, jump to runtime
269 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
270 // - in runtime: after initializing class, restore original code, reexecute instruction
271
272 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
273
274 void PatchingStub::align_patch_site(MacroAssembler* masm) {
275 }
276
277 void PatchingStub::emit_code(LIR_Assembler* ce) {
278 assert(false, "AArch64 should not use C1 runtime patching");
279 }
280
281
282 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
283 __ bind(_entry);
284 ce->store_parameter(_trap_request, 0);
285 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
286 ce->add_call_info_here(_info);
287 DEBUG_ONLY(__ should_not_reach_here());
288 }
289
290
291 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
292 address a;
293 if (_info->deoptimize_on_exception()) {
294 // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
295 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
296 } else {
297 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
298 }
299
300 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
301 __ bind(_entry);
302 __ far_call(RuntimeAddress(a));
303 ce->add_call_info_here(_info);
304 ce->verify_oop_map(_info);
305 debug_only(__ should_not_reach_here());
306 }
307
308
309 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
310 assert(__ rsp_offset() == 0, "frame size should be fixed");
311
312 __ bind(_entry);
313 // pass the object in a scratch register because all other registers
314 // must be preserved
315 if (_obj->is_cpu_register()) {
316 __ mov(rscratch1, _obj->as_register());
317 }
318 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub)), NULL, rscratch2);
319 ce->add_call_info_here(_info);
320 debug_only(__ should_not_reach_here());
321 }
322
323
324 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
325 //---------------slow case: call to native-----------------
326 __ bind(_entry);
327 // Figure out where the args should go
328 // This should really convert the IntrinsicID to the Method* and signature
329 // but I don't know how to do that.
330 //
331 VMRegPair args[5];
332 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
333 SharedRuntime::java_calling_convention(signature, args, 5, true);
334
335 // push parameters
336 // (src, src_pos, dest, destPos, length)
337 Register r[5];
338 r[0] = src()->as_register();
339 r[1] = src_pos()->as_register();
340 r[2] = dst()->as_register();
341 r[3] = dst_pos()->as_register();
342 r[4] = length()->as_register();
343
344 // next registers will get stored on the stack
345 for (int i = 0; i < 5 ; i++ ) {
346 VMReg r_1 = args[i].first();
347 if (r_1->is_stack()) {
348 int st_off = r_1->reg2stack() * wordSize;
349 __ str (r[i], Address(sp, st_off));
350 } else {
351 assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
352 }
353 }
354
355 ce->align_call(lir_static_call);
356
357 ce->emit_static_call_stub();
358 if (ce->compilation()->bailed_out()) {
359 return; // CodeCache is full
360 }
361 Address resolve(SharedRuntime::get_resolve_static_call_stub(),
362 relocInfo::static_call_type);
363 address call = __ trampoline_call(resolve);
364 if (call == NULL) {
365 ce->bailout("trampoline stub overflow");
366 return;
367 }
368 ce->add_call_info_here(info());
369
370 #ifndef PRODUCT
371 __ lea(rscratch2, ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
372 __ incrementw(Address(rscratch2));
373 #endif
374
375 __ b(_continuation);
376 }
377
378 #undef __