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 * Copyright (c) 2020, 2022, Huawei Technologies Co., Ltd. All rights reserved.
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 *
7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #include "precompiled.hpp"
28 #include "asm/macroAssembler.inline.hpp"
29 #include "c1/c1_CodeStubs.hpp"
30 #include "c1/c1_FrameMap.hpp"
31 #include "c1/c1_LIRAssembler.hpp"
32 #include "c1/c1_MacroAssembler.hpp"
33 #include "c1/c1_Runtime1.hpp"
34 #include "classfile/javaClasses.hpp"
35 #include "nativeInst_riscv.hpp"
36 #include "runtime/sharedRuntime.hpp"
37 #include "vmreg_riscv.inline.hpp"
38
39
40 #define __ ce->masm()->
41
42 void C1SafepointPollStub::emit_code(LIR_Assembler* ce) {
43 __ bind(_entry);
44 InternalAddress safepoint_pc(__ pc() - __ offset() + safepoint_offset());
45 __ code_section()->relocate(__ pc(), safepoint_pc.rspec());
46 __ la(t0, safepoint_pc.target());
47 __ sd(t0, Address(xthread, JavaThread::saved_exception_pc_offset()));
48
49 assert(SharedRuntime::polling_page_return_handler_blob() != NULL,
50 "polling page return stub not created yet");
51 address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point();
52
53 __ far_jump(RuntimeAddress(stub));
54 }
55
56 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
57 __ bind(_entry);
58 Metadata *m = _method->as_constant_ptr()->as_metadata();
59 __ mov_metadata(t0, m);
60 ce->store_parameter(t0, 1);
61 ce->store_parameter(_bci, 0);
62 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id)));
63 ce->add_call_info_here(_info);
64 ce->verify_oop_map(_info);
65 __ j(_continuation);
66 }
67
68 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, LIR_Opr array)
69 : _index(index), _array(array), _throw_index_out_of_bounds_exception(false) {
70 assert(info != NULL, "must have info");
71 _info = new CodeEmitInfo(info);
72 }
73
74 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index)
75 : _index(index), _array(NULL), _throw_index_out_of_bounds_exception(true) {
76 assert(info != NULL, "must have info");
77 _info = new CodeEmitInfo(info);
78 }
79
80 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
81 __ bind(_entry);
82 if (_info->deoptimize_on_exception()) {
83 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
84 __ far_call(RuntimeAddress(a));
85 ce->add_call_info_here(_info);
86 ce->verify_oop_map(_info);
87 debug_only(__ should_not_reach_here());
88 return;
89 }
90
91 if (_index->is_cpu_register()) {
92 __ mv(t0, _index->as_register());
93 } else {
94 __ mv(t0, _index->as_jint());
95 }
96 Runtime1::StubID stub_id;
97 if (_throw_index_out_of_bounds_exception) {
98 stub_id = Runtime1::throw_index_exception_id;
99 } else {
100 assert(_array != NULL, "sanity");
101 __ mv(t1, _array->as_pointer_register());
102 stub_id = Runtime1::throw_range_check_failed_id;
103 }
104 int32_t off = 0;
105 __ la_patchable(ra, RuntimeAddress(Runtime1::entry_for(stub_id)), off);
106 __ jalr(ra, ra, off);
107 ce->add_call_info_here(_info);
108 ce->verify_oop_map(_info);
109 debug_only(__ should_not_reach_here());
110 }
111
112 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
113 _info = new CodeEmitInfo(info);
114 }
115
116 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
117 __ bind(_entry);
118 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
119 __ far_call(RuntimeAddress(a));
120 ce->add_call_info_here(_info);
121 ce->verify_oop_map(_info);
122 debug_only(__ should_not_reach_here());
123 }
124
125 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
126 if (_offset != -1) {
127 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
128 }
129 __ bind(_entry);
130 __ far_call(Address(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type));
131 ce->add_call_info_here(_info);
132 ce->verify_oop_map(_info);
133 #ifdef ASSERT
134 __ should_not_reach_here();
135 #endif
136 }
137
138 // Implementation of NewInstanceStub
139 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
140 _result = result;
141 _klass = klass;
142 _klass_reg = klass_reg;
143 _info = new CodeEmitInfo(info);
144 assert(stub_id == Runtime1::new_instance_id ||
145 stub_id == Runtime1::fast_new_instance_id ||
146 stub_id == Runtime1::fast_new_instance_init_check_id,
147 "need new_instance id");
148 _stub_id = stub_id;
149 }
150
151 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
152 assert(__ rsp_offset() == 0, "frame size should be fixed");
153 __ bind(_entry);
154 __ mv(x13, _klass_reg->as_register());
155 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
156 ce->add_call_info_here(_info);
157 ce->verify_oop_map(_info);
158 assert(_result->as_register() == x10, "result must in x10");
159 __ j(_continuation);
160 }
161
162 // Implementation of NewTypeArrayStub
163 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
164 _klass_reg = klass_reg;
165 _length = length;
166 _result = result;
167 _info = new CodeEmitInfo(info);
168 }
169
170 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
171 assert(__ rsp_offset() == 0, "frame size should be fixed");
172 __ bind(_entry);
173 assert(_length->as_register() == x9, "length must in x9");
174 assert(_klass_reg->as_register() == x13, "klass_reg must in x13");
175 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
176 ce->add_call_info_here(_info);
177 ce->verify_oop_map(_info);
178 assert(_result->as_register() == x10, "result must in x10");
179 __ j(_continuation);
180 }
181
182 // Implementation of NewObjectArrayStub
183 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
184 _klass_reg = klass_reg;
185 _result = result;
186 _length = length;
187 _info = new CodeEmitInfo(info);
188 }
189
190 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
191 assert(__ rsp_offset() == 0, "frame size should be fixed");
192 __ bind(_entry);
193 assert(_length->as_register() == x9, "length must in x9");
194 assert(_klass_reg->as_register() == x13, "klass_reg must in x13");
195 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
196 ce->add_call_info_here(_info);
197 ce->verify_oop_map(_info);
198 assert(_result->as_register() == x10, "result must in x10");
199 __ j(_continuation);
200 }
201
202 // Implementation of MonitorAccessStubs
203 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
204 : MonitorAccessStub(obj_reg, lock_reg) {
205 _info = new CodeEmitInfo(info);
206 }
207
208 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
209 assert(__ rsp_offset() == 0, "frame size should be fixed");
210 __ bind(_entry);
211 ce->store_parameter(_obj_reg->as_register(), 1);
212 ce->store_parameter(_lock_reg->as_register(), 0);
213 Runtime1::StubID enter_id;
214 if (ce->compilation()->has_fpu_code()) {
215 enter_id = Runtime1::monitorenter_id;
216 } else {
217 enter_id = Runtime1::monitorenter_nofpu_id;
218 }
219 __ far_call(RuntimeAddress(Runtime1::entry_for(enter_id)));
220 ce->add_call_info_here(_info);
221 ce->verify_oop_map(_info);
222 __ j(_continuation);
223 }
224
225 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
226 __ bind(_entry);
227 if (_compute_lock) {
228 // lock_reg was destroyed by fast unlocking attempt => recompute it
229 ce->monitor_address(_monitor_ix, _lock_reg);
230 }
231 ce->store_parameter(_lock_reg->as_register(), 0);
232 // note: non-blocking leaf routine => no call info needed
233 Runtime1::StubID exit_id;
234 if (ce->compilation()->has_fpu_code()) {
235 exit_id = Runtime1::monitorexit_id;
236 } else {
237 exit_id = Runtime1::monitorexit_nofpu_id;
238 }
239 __ la(ra, _continuation);
240 __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));
241 }
242
243 // Implementation of patching:
244 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
245 // - Replace original code with a call to the stub
246 // At Runtime:
247 // - call to stub, jump to runtime
248 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
249 // - in runtime: after initializing class, restore original code, reexecute instruction
250
251 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
252
253 void PatchingStub::align_patch_site(MacroAssembler* masm) {}
254
255 void PatchingStub::emit_code(LIR_Assembler* ce) {
256 assert(false, "RISCV should not use C1 runtime patching");
257 }
258
259 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
260 __ bind(_entry);
261 ce->store_parameter(_trap_request, 0);
262 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
263 ce->add_call_info_here(_info);
264 DEBUG_ONLY(__ should_not_reach_here());
265 }
266
267 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
268 address a = NULL;
269 if (_info->deoptimize_on_exception()) {
270 // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
271 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
272 } else {
273 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
274 }
275
276 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
277 __ bind(_entry);
278 __ far_call(RuntimeAddress(a));
279 ce->add_call_info_here(_info);
280 ce->verify_oop_map(_info);
281 debug_only(__ should_not_reach_here());
282 }
283
284 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
285 assert(__ rsp_offset() == 0, "frame size should be fixed");
286
287 __ bind(_entry);
288 // pass the object in a tmp register because all other registers
289 // must be preserved
290 if (_obj->is_cpu_register()) {
291 __ mv(t0, _obj->as_register());
292 }
293 __ far_call(RuntimeAddress(Runtime1::entry_for(_stub)), NULL, t1);
294 ce->add_call_info_here(_info);
295 debug_only(__ should_not_reach_here());
296 }
297
298 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
299 // ---------------slow case: call to native-----------------
300 __ bind(_entry);
301 // Figure out where the args should go
302 // This should really convert the IntrinsicID to the Method* and signature
303 // but I don't know how to do that.
304 const int args_num = 5;
305 VMRegPair args[args_num];
306 BasicType signature[args_num] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT };
307 SharedRuntime::java_calling_convention(signature, args, args_num);
308
309 // push parameters
310 Register r[args_num];
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 j = 0; j < args_num; j++) {
319 VMReg r_1 = args[j].first();
320 if (r_1->is_stack()) {
321 int st_off = r_1->reg2stack() * wordSize;
322 __ sd(r[j], Address(sp, st_off));
323 } else {
324 assert(r[j] == args[j].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 if (PrintC1Statistics) {
345 __ la(t1, ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
346 __ add_memory_int32(Address(t1), 1);
347 }
348 #endif
349
350 __ j(_continuation);
351 }
352
353 #undef __