1 /*
2 * Copyright (c) 2008, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/macroAssembler.inline.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_arm.hpp"
33 #include "runtime/sharedRuntime.hpp"
34 #include "utilities/macros.hpp"
35 #include "vmreg_arm.inline.hpp"
36
37 #define __ ce->masm()->
38
emit_code(LIR_Assembler * ce)39 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
40 __ bind(_entry);
41 ce->store_parameter(_bci, 0);
42 ce->store_parameter(_method->as_constant_ptr()->as_metadata(), 1);
43 __ call(Runtime1::entry_for(Runtime1::counter_overflow_id), relocInfo::runtime_call_type);
44 ce->add_call_info_here(_info);
45 ce->verify_oop_map(_info);
46
47 __ b(_continuation);
48 }
49
50
51 // TODO: ARM - is it possible to inline these stubs into the main code stream?
52
53
RangeCheckStub(CodeEmitInfo * info,LIR_Opr index,LIR_Opr array)54 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, LIR_Opr array)
55 : _index(index), _array(array), _throw_index_out_of_bounds_exception(false) {
56 assert(info != NULL, "must have info");
57 _info = new CodeEmitInfo(info);
58 }
59
RangeCheckStub(CodeEmitInfo * info,LIR_Opr index)60 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index)
61 : _index(index), _array(NULL), _throw_index_out_of_bounds_exception(true) {
62 assert(info != NULL, "must have info");
63 _info = new CodeEmitInfo(info);
64 }
65
emit_code(LIR_Assembler * ce)66 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
67 __ bind(_entry);
68
69 if (_info->deoptimize_on_exception()) {
70 __ call(Runtime1::entry_for(Runtime1::predicate_failed_trap_id), relocInfo::runtime_call_type);
71 ce->add_call_info_here(_info);
72 ce->verify_oop_map(_info);
73 debug_only(__ should_not_reach_here());
74 return;
75 }
76 // Pass the array index on stack because all registers must be preserved
77 ce->verify_reserved_argument_area_size(_throw_index_out_of_bounds_exception ? 1 : 2);
78 if (_index->is_cpu_register()) {
79 __ str_32(_index->as_register(), Address(SP));
80 } else {
81 __ mov_slow(Rtemp, _index->as_jint()); // Rtemp should be OK in C1
82 __ str_32(Rtemp, Address(SP));
83 }
84
85 if (_throw_index_out_of_bounds_exception) {
86 __ call(Runtime1::entry_for(Runtime1::throw_index_exception_id), relocInfo::runtime_call_type);
87 } else {
88 __ str(_array->as_pointer_register(), Address(SP, BytesPerWord)); // ??? Correct offset? Correct instruction?
89 __ call(Runtime1::entry_for(Runtime1::throw_range_check_failed_id), relocInfo::runtime_call_type);
90 }
91 ce->add_call_info_here(_info);
92 ce->verify_oop_map(_info);
93 DEBUG_ONLY(STOP("RangeCheck");)
94 }
95
PredicateFailedStub(CodeEmitInfo * info)96 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
97 _info = new CodeEmitInfo(info);
98 }
99
emit_code(LIR_Assembler * ce)100 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
101 __ bind(_entry);
102 __ call(Runtime1::entry_for(Runtime1::predicate_failed_trap_id), relocInfo::runtime_call_type);
103 ce->add_call_info_here(_info);
104 ce->verify_oop_map(_info);
105 debug_only(__ should_not_reach_here());
106 }
107
emit_code(LIR_Assembler * ce)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 __ call(Runtime1::entry_for(Runtime1::throw_div0_exception_id),
114 relocInfo::runtime_call_type);
115 ce->add_call_info_here(_info);
116 DEBUG_ONLY(STOP("DivByZero");)
117 }
118
119
120 // Implementation of NewInstanceStub
121
NewInstanceStub(LIR_Opr klass_reg,LIR_Opr result,ciInstanceKlass * klass,CodeEmitInfo * info,Runtime1::StubID stub_id)122 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
123 _result = result;
124 _klass = klass;
125 _klass_reg = klass_reg;
126 _info = new CodeEmitInfo(info);
127 assert(stub_id == Runtime1::new_instance_id ||
128 stub_id == Runtime1::fast_new_instance_id ||
129 stub_id == Runtime1::fast_new_instance_init_check_id,
130 "need new_instance id");
131 _stub_id = stub_id;
132 }
133
134
emit_code(LIR_Assembler * ce)135 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
136 assert(_result->as_register() == R0, "runtime call setup");
137 assert(_klass_reg->as_register() == R1, "runtime call setup");
138 __ bind(_entry);
139 __ call(Runtime1::entry_for(_stub_id), relocInfo::runtime_call_type);
140 ce->add_call_info_here(_info);
141 ce->verify_oop_map(_info);
142 __ b(_continuation);
143 }
144
145
146 // Implementation of NewTypeArrayStub
147
NewTypeArrayStub(LIR_Opr klass_reg,LIR_Opr length,LIR_Opr result,CodeEmitInfo * info)148 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
149 _klass_reg = klass_reg;
150 _length = length;
151 _result = result;
152 _info = new CodeEmitInfo(info);
153 }
154
155
emit_code(LIR_Assembler * ce)156 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
157 assert(_result->as_register() == R0, "runtime call setup");
158 assert(_klass_reg->as_register() == R1, "runtime call setup");
159 assert(_length->as_register() == R2, "runtime call setup");
160 __ bind(_entry);
161 __ call(Runtime1::entry_for(Runtime1::new_type_array_id), relocInfo::runtime_call_type);
162 ce->add_call_info_here(_info);
163 ce->verify_oop_map(_info);
164 __ b(_continuation);
165 }
166
167
168 // Implementation of NewObjectArrayStub
169
NewObjectArrayStub(LIR_Opr klass_reg,LIR_Opr length,LIR_Opr result,CodeEmitInfo * info)170 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
171 _klass_reg = klass_reg;
172 _result = result;
173 _length = length;
174 _info = new CodeEmitInfo(info);
175 }
176
177
emit_code(LIR_Assembler * ce)178 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
179 assert(_result->as_register() == R0, "runtime call setup");
180 assert(_klass_reg->as_register() == R1, "runtime call setup");
181 assert(_length->as_register() == R2, "runtime call setup");
182 __ bind(_entry);
183 __ call(Runtime1::entry_for(Runtime1::new_object_array_id), relocInfo::runtime_call_type);
184 ce->add_call_info_here(_info);
185 ce->verify_oop_map(_info);
186 __ b(_continuation);
187 }
188
189
190 // Implementation of MonitorAccessStubs
191
MonitorEnterStub(LIR_Opr obj_reg,LIR_Opr lock_reg,CodeEmitInfo * info)192 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
193 : MonitorAccessStub(obj_reg, lock_reg)
194 {
195 _info = new CodeEmitInfo(info);
196 }
197
198
emit_code(LIR_Assembler * ce)199 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
200 __ bind(_entry);
201 const Register obj_reg = _obj_reg->as_pointer_register();
202 const Register lock_reg = _lock_reg->as_pointer_register();
203
204 ce->verify_reserved_argument_area_size(2);
205 if (obj_reg < lock_reg) {
206 __ stmia(SP, RegisterSet(obj_reg) | RegisterSet(lock_reg));
207 } else {
208 __ str(obj_reg, Address(SP));
209 __ str(lock_reg, Address(SP, BytesPerWord));
210 }
211
212 Runtime1::StubID enter_id = ce->compilation()->has_fpu_code() ?
213 Runtime1::monitorenter_id :
214 Runtime1::monitorenter_nofpu_id;
215 __ call(Runtime1::entry_for(enter_id), relocInfo::runtime_call_type);
216 ce->add_call_info_here(_info);
217 ce->verify_oop_map(_info);
218 __ b(_continuation);
219 }
220
221
emit_code(LIR_Assembler * ce)222 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
223 __ bind(_entry);
224 if (_compute_lock) {
225 ce->monitor_address(_monitor_ix, _lock_reg);
226 }
227 const Register lock_reg = _lock_reg->as_pointer_register();
228
229 ce->verify_reserved_argument_area_size(1);
230 __ str(lock_reg, Address(SP));
231
232 // Non-blocking leaf routine - no call info needed
233 Runtime1::StubID exit_id = ce->compilation()->has_fpu_code() ?
234 Runtime1::monitorexit_id :
235 Runtime1::monitorexit_nofpu_id;
236 __ call(Runtime1::entry_for(exit_id), relocInfo::runtime_call_type);
237 __ b(_continuation);
238 }
239
240
241 // Call return is directly after patch word
242 int PatchingStub::_patch_info_offset = 0;
243
align_patch_site(MacroAssembler * masm)244 void PatchingStub::align_patch_site(MacroAssembler* masm) {
245 #if 0
246 // TODO: investigate if we required to implement this
247 ShouldNotReachHere();
248 #endif
249 }
250
emit_code(LIR_Assembler * ce)251 void PatchingStub::emit_code(LIR_Assembler* ce) {
252 const int patchable_instruction_offset = 0;
253
254 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF,
255 "not enough room for call");
256 assert((_bytes_to_copy & 3) == 0, "must copy a multiple of four bytes");
257 Label call_patch;
258 bool is_load = (_id == load_klass_id) || (_id == load_mirror_id) || (_id == load_appendix_id);
259
260
261 if (is_load && !VM_Version::supports_movw()) {
262 address start = __ pc();
263
264 // The following sequence duplicates code provided in MacroAssembler::patchable_mov_oop()
265 // without creating relocation info entry.
266
267 assert((__ pc() - start) == patchable_instruction_offset, "should be");
268 __ ldr(_obj, Address(PC));
269 // Extra nop to handle case of large offset of oop placeholder (see NativeMovConstReg::set_data).
270 __ nop();
271
272 #ifdef ASSERT
273 for (int i = 0; i < _bytes_to_copy; i++) {
274 assert(((address)_pc_start)[i] == start[i], "should be the same code");
275 }
276 #endif // ASSERT
277 }
278
279 address being_initialized_entry = __ pc();
280 if (CommentedAssembly) {
281 __ block_comment(" patch template");
282 }
283 if (is_load) {
284 address start = __ pc();
285 if (_id == load_mirror_id || _id == load_appendix_id) {
286 __ patchable_mov_oop(_obj, (jobject)Universe::non_oop_word(), _index);
287 } else {
288 __ patchable_mov_metadata(_obj, (Metadata*)Universe::non_oop_word(), _index);
289 }
290 #ifdef ASSERT
291 for (int i = 0; i < _bytes_to_copy; i++) {
292 assert(((address)_pc_start)[i] == start[i], "should be the same code");
293 }
294 #endif // ASSERT
295 } else {
296 int* start = (int*)_pc_start;
297 int* end = start + (_bytes_to_copy / BytesPerInt);
298 while (start < end) {
299 __ emit_int32(*start++);
300 }
301 }
302 address end_of_patch = __ pc();
303
304 int bytes_to_skip = 0;
305 if (_id == load_mirror_id) {
306 int offset = __ offset();
307 if (CommentedAssembly) {
308 __ block_comment(" being_initialized check");
309 }
310
311 assert(_obj != noreg, "must be a valid register");
312 // Rtemp should be OK in C1
313 __ ldr(Rtemp, Address(_obj, java_lang_Class::klass_offset_in_bytes()));
314 __ ldr(Rtemp, Address(Rtemp, InstanceKlass::init_thread_offset()));
315 __ cmp(Rtemp, Rthread);
316 __ b(call_patch, ne);
317 __ b(_patch_site_continuation);
318
319 bytes_to_skip += __ offset() - offset;
320 }
321
322 if (CommentedAssembly) {
323 __ block_comment("patch data - 3 high bytes of the word");
324 }
325 const int sizeof_patch_record = 4;
326 bytes_to_skip += sizeof_patch_record;
327 int being_initialized_entry_offset = __ pc() - being_initialized_entry + sizeof_patch_record;
328 __ emit_int32(0xff | being_initialized_entry_offset << 8 | bytes_to_skip << 16 | _bytes_to_copy << 24);
329
330 address patch_info_pc = __ pc();
331 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
332
333 // runtime call will return here
334 Label call_return;
335 __ bind(call_return);
336 ce->add_call_info_here(_info);
337 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
338 __ b(_patch_site_entry);
339
340 address entry = __ pc();
341 NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
342 address target = NULL;
343 relocInfo::relocType reloc_type = relocInfo::none;
344 switch (_id) {
345 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
346 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break;
347 case load_mirror_id: target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break;
348 case load_appendix_id: target = Runtime1::entry_for(Runtime1::load_appendix_patching_id); reloc_type = relocInfo::oop_type; break;
349 default: ShouldNotReachHere();
350 }
351 __ bind(call_patch);
352
353 if (CommentedAssembly) {
354 __ block_comment("patch entry point");
355 }
356
357 // arrange for call to return just after patch word
358 __ adr(LR, call_return);
359 __ jump(target, relocInfo::runtime_call_type, Rtemp);
360
361 if (is_load) {
362 CodeSection* cs = __ code_section();
363 address pc = (address)_pc_start;
364 RelocIterator iter(cs, pc, pc + 1);
365 relocInfo::change_reloc_info_for_address(&iter, pc, reloc_type, relocInfo::none);
366 }
367 }
368
emit_code(LIR_Assembler * ce)369 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
370 __ bind(_entry);
371 __ mov_slow(Rtemp, _trap_request);
372 ce->verify_reserved_argument_area_size(1);
373 __ str(Rtemp, Address(SP));
374 __ call(Runtime1::entry_for(Runtime1::deoptimize_id), relocInfo::runtime_call_type);
375 ce->add_call_info_here(_info);
376 DEBUG_ONLY(__ should_not_reach_here());
377 }
378
379
emit_code(LIR_Assembler * ce)380 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
381 address a;
382 if (_info->deoptimize_on_exception()) {
383 // Deoptimize, do not throw the exception, because it is
384 // probably wrong to do it here.
385 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
386 } else {
387 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
388 }
389 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
390 __ bind(_entry);
391 __ call(a, relocInfo::runtime_call_type);
392 ce->add_call_info_here(_info);
393 ce->verify_oop_map(_info);
394 DEBUG_ONLY(STOP("ImplicitNullCheck");)
395 }
396
397
emit_code(LIR_Assembler * ce)398 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
399 __ bind(_entry);
400 // Pass the object on stack because all registers must be preserved
401 if (_obj->is_cpu_register()) {
402 ce->verify_reserved_argument_area_size(1);
403 __ str(_obj->as_pointer_register(), Address(SP));
404 } else {
405 assert(_obj->is_illegal(), "should be");
406 }
407 __ call(Runtime1::entry_for(_stub), relocInfo::runtime_call_type);
408 ce->add_call_info_here(_info);
409 DEBUG_ONLY(STOP("SimpleException");)
410 }
411
412
emit_code(LIR_Assembler * ce)413 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
414 __ bind(_entry);
415
416 VMRegPair args[5];
417 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT };
418 SharedRuntime::java_calling_convention(signature, args, 5, true);
419
420 Register r[5];
421 r[0] = src()->as_pointer_register();
422 r[1] = src_pos()->as_register();
423 r[2] = dst()->as_pointer_register();
424 r[3] = dst_pos()->as_register();
425 r[4] = length()->as_register();
426
427 for (int i = 0; i < 5; i++) {
428 VMReg arg = args[i].first();
429 if (arg->is_stack()) {
430 __ str(r[i], Address(SP, arg->reg2stack() * VMRegImpl::stack_slot_size));
431 } else {
432 assert(r[i] == arg->as_Register(), "Calling conventions must match");
433 }
434 }
435
436 ce->emit_static_call_stub();
437 if (ce->compilation()->bailed_out()) {
438 return; // CodeCache is full
439 }
440 int ret_addr_offset = __ patchable_call(SharedRuntime::get_resolve_static_call_stub(), relocInfo::static_call_type);
441 assert(ret_addr_offset == __ offset(), "embedded return address not allowed");
442 ce->add_call_info_here(info());
443 ce->verify_oop_map(info());
444 __ b(_continuation);
445 }
446
447 #undef __
448