Mercurial > hg > truffle
annotate src/cpu/x86/vm/c1_CodeStubs_x86.cpp @ 1865:1c352af0135d
6763959: java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
Summary: Absolute time 0 needs to return immediately.
Reviewed-by: phh, dcubed, dholmes
author | acorn |
---|---|
date | Mon, 04 Oct 2010 13:11:10 -0400 |
parents | c18cbe5936b8 |
children | d5d065957597 |
rev | line source |
---|---|
0 | 1 /* |
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2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
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20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_c1_CodeStubs_x86.cpp.incl" | |
27 | |
28 | |
29 #define __ ce->masm()-> | |
30 | |
31 float ConversionStub::float_zero = 0.0; | |
32 double ConversionStub::double_zero = 0.0; | |
33 | |
34 void ConversionStub::emit_code(LIR_Assembler* ce) { | |
35 __ bind(_entry); | |
36 assert(bytecode() == Bytecodes::_f2i || bytecode() == Bytecodes::_d2i, "other conversions do not require stub"); | |
37 | |
38 | |
39 if (input()->is_single_xmm()) { | |
40 __ comiss(input()->as_xmm_float_reg(), | |
41 ExternalAddress((address)&float_zero)); | |
42 } else if (input()->is_double_xmm()) { | |
43 __ comisd(input()->as_xmm_double_reg(), | |
44 ExternalAddress((address)&double_zero)); | |
45 } else { | |
304 | 46 LP64_ONLY(ShouldNotReachHere()); |
47 __ push(rax); | |
0 | 48 __ ftst(); |
49 __ fnstsw_ax(); | |
50 __ sahf(); | |
304 | 51 __ pop(rax); |
0 | 52 } |
53 | |
54 Label NaN, do_return; | |
55 __ jccb(Assembler::parity, NaN); | |
56 __ jccb(Assembler::below, do_return); | |
57 | |
58 // input is > 0 -> return maxInt | |
59 // result register already contains 0x80000000, so subtracting 1 gives 0x7fffffff | |
60 __ decrement(result()->as_register()); | |
61 __ jmpb(do_return); | |
62 | |
63 // input is NaN -> return 0 | |
64 __ bind(NaN); | |
304 | 65 __ xorptr(result()->as_register(), result()->as_register()); |
0 | 66 |
67 __ bind(do_return); | |
68 __ jmp(_continuation); | |
69 } | |
70 | |
71 #ifdef TIERED | |
72 void CounterOverflowStub::emit_code(LIR_Assembler* ce) { | |
73 __ bind(_entry); | |
74 ce->store_parameter(_bci, 0); | |
75 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id))); | |
76 ce->add_call_info_here(_info); | |
77 ce->verify_oop_map(_info); | |
78 | |
79 __ jmp(_continuation); | |
80 } | |
81 #endif // TIERED | |
82 | |
83 | |
84 | |
85 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, | |
86 bool throw_index_out_of_bounds_exception) | |
87 : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception) | |
88 , _index(index) | |
89 { | |
90 _info = info == NULL ? NULL : new CodeEmitInfo(info); | |
91 } | |
92 | |
93 | |
94 void RangeCheckStub::emit_code(LIR_Assembler* ce) { | |
95 __ bind(_entry); | |
96 // pass the array index on stack because all registers must be preserved | |
97 if (_index->is_cpu_register()) { | |
98 ce->store_parameter(_index->as_register(), 0); | |
99 } else { | |
100 ce->store_parameter(_index->as_jint(), 0); | |
101 } | |
102 Runtime1::StubID stub_id; | |
103 if (_throw_index_out_of_bounds_exception) { | |
104 stub_id = Runtime1::throw_index_exception_id; | |
105 } else { | |
106 stub_id = Runtime1::throw_range_check_failed_id; | |
107 } | |
108 __ call(RuntimeAddress(Runtime1::entry_for(stub_id))); | |
109 ce->add_call_info_here(_info); | |
110 debug_only(__ should_not_reach_here()); | |
111 } | |
112 | |
113 | |
114 void DivByZeroStub::emit_code(LIR_Assembler* ce) { | |
115 if (_offset != -1) { | |
116 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); | |
117 } | |
118 __ bind(_entry); | |
119 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_div0_exception_id))); | |
120 ce->add_call_info_here(_info); | |
121 debug_only(__ should_not_reach_here()); | |
122 } | |
123 | |
124 | |
125 // Implementation of NewInstanceStub | |
126 | |
127 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) { | |
128 _result = result; | |
129 _klass = klass; | |
130 _klass_reg = klass_reg; | |
131 _info = new CodeEmitInfo(info); | |
132 assert(stub_id == Runtime1::new_instance_id || | |
133 stub_id == Runtime1::fast_new_instance_id || | |
134 stub_id == Runtime1::fast_new_instance_init_check_id, | |
135 "need new_instance id"); | |
136 _stub_id = stub_id; | |
137 } | |
138 | |
139 | |
140 void NewInstanceStub::emit_code(LIR_Assembler* ce) { | |
141 assert(__ rsp_offset() == 0, "frame size should be fixed"); | |
142 __ bind(_entry); | |
304 | 143 __ movptr(rdx, _klass_reg->as_register()); |
0 | 144 __ call(RuntimeAddress(Runtime1::entry_for(_stub_id))); |
145 ce->add_call_info_here(_info); | |
146 ce->verify_oop_map(_info); | |
147 assert(_result->as_register() == rax, "result must in rax,"); | |
148 __ jmp(_continuation); | |
149 } | |
150 | |
151 | |
152 // Implementation of NewTypeArrayStub | |
153 | |
154 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { | |
155 _klass_reg = klass_reg; | |
156 _length = length; | |
157 _result = result; | |
158 _info = new CodeEmitInfo(info); | |
159 } | |
160 | |
161 | |
162 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) { | |
163 assert(__ rsp_offset() == 0, "frame size should be fixed"); | |
164 __ bind(_entry); | |
165 assert(_length->as_register() == rbx, "length must in rbx,"); | |
166 assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx"); | |
167 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id))); | |
168 ce->add_call_info_here(_info); | |
169 ce->verify_oop_map(_info); | |
170 assert(_result->as_register() == rax, "result must in rax,"); | |
171 __ jmp(_continuation); | |
172 } | |
173 | |
174 | |
175 // Implementation of NewObjectArrayStub | |
176 | |
177 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { | |
178 _klass_reg = klass_reg; | |
179 _result = result; | |
180 _length = length; | |
181 _info = new CodeEmitInfo(info); | |
182 } | |
183 | |
184 | |
185 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) { | |
186 assert(__ rsp_offset() == 0, "frame size should be fixed"); | |
187 __ bind(_entry); | |
188 assert(_length->as_register() == rbx, "length must in rbx,"); | |
189 assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx"); | |
190 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id))); | |
191 ce->add_call_info_here(_info); | |
192 ce->verify_oop_map(_info); | |
193 assert(_result->as_register() == rax, "result must in rax,"); | |
194 __ jmp(_continuation); | |
195 } | |
196 | |
197 | |
198 // Implementation of MonitorAccessStubs | |
199 | |
200 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info) | |
201 : MonitorAccessStub(obj_reg, lock_reg) | |
202 { | |
203 _info = new CodeEmitInfo(info); | |
204 } | |
205 | |
206 | |
207 void MonitorEnterStub::emit_code(LIR_Assembler* ce) { | |
208 assert(__ rsp_offset() == 0, "frame size should be fixed"); | |
209 __ bind(_entry); | |
210 ce->store_parameter(_obj_reg->as_register(), 1); | |
211 ce->store_parameter(_lock_reg->as_register(), 0); | |
212 Runtime1::StubID enter_id; | |
213 if (ce->compilation()->has_fpu_code()) { | |
214 enter_id = Runtime1::monitorenter_id; | |
215 } else { | |
216 enter_id = Runtime1::monitorenter_nofpu_id; | |
217 } | |
218 __ call(RuntimeAddress(Runtime1::entry_for(enter_id))); | |
219 ce->add_call_info_here(_info); | |
220 ce->verify_oop_map(_info); | |
221 __ jmp(_continuation); | |
222 } | |
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 __ call(RuntimeAddress(Runtime1::entry_for(exit_id))); | |
240 __ jmp(_continuation); | |
241 } | |
242 | |
243 | |
244 // Implementation of patching: | |
245 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes) | |
246 // - Replace original code with a call to the stub | |
247 // At Runtime: | |
248 // - call to stub, jump to runtime | |
249 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object) | |
250 // - in runtime: after initializing class, restore original code, reexecute instruction | |
251 | |
252 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size; | |
253 | |
254 void PatchingStub::align_patch_site(MacroAssembler* masm) { | |
255 // We're patching a 5-7 byte instruction on intel and we need to | |
256 // make sure that we don't see a piece of the instruction. It | |
257 // appears mostly impossible on Intel to simply invalidate other | |
258 // processors caches and since they may do aggressive prefetch it's | |
259 // very hard to make a guess about what code might be in the icache. | |
260 // Force the instruction to be double word aligned so that it | |
261 // doesn't span a cache line. | |
262 masm->align(round_to(NativeGeneralJump::instruction_size, wordSize)); | |
263 } | |
264 | |
265 void PatchingStub::emit_code(LIR_Assembler* ce) { | |
266 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, "not enough room for call"); | |
267 | |
268 Label call_patch; | |
269 | |
270 // static field accesses have special semantics while the class | |
271 // initializer is being run so we emit a test which can be used to | |
272 // check that this code is being executed by the initializing | |
273 // thread. | |
274 address being_initialized_entry = __ pc(); | |
275 if (CommentedAssembly) { | |
276 __ block_comment(" patch template"); | |
277 } | |
278 if (_id == load_klass_id) { | |
279 // produce a copy of the load klass instruction for use by the being initialized case | |
280 address start = __ pc(); | |
281 jobject o = NULL; | |
282 __ movoop(_obj, o); | |
283 #ifdef ASSERT | |
284 for (int i = 0; i < _bytes_to_copy; i++) { | |
285 address ptr = (address)(_pc_start + i); | |
286 int a_byte = (*ptr) & 0xFF; | |
287 assert(a_byte == *start++, "should be the same code"); | |
288 } | |
289 #endif | |
290 } else { | |
291 // make a copy the code which is going to be patched. | |
292 for ( int i = 0; i < _bytes_to_copy; i++) { | |
293 address ptr = (address)(_pc_start + i); | |
294 int a_byte = (*ptr) & 0xFF; | |
295 __ a_byte (a_byte); | |
296 *ptr = 0x90; // make the site look like a nop | |
297 } | |
298 } | |
299 | |
300 address end_of_patch = __ pc(); | |
301 int bytes_to_skip = 0; | |
302 if (_id == load_klass_id) { | |
303 int offset = __ offset(); | |
304 if (CommentedAssembly) { | |
305 __ block_comment(" being_initialized check"); | |
306 } | |
307 assert(_obj != noreg, "must be a valid register"); | |
308 Register tmp = rax; | |
309 if (_obj == tmp) tmp = rbx; | |
304 | 310 __ push(tmp); |
0 | 311 __ get_thread(tmp); |
304 | 312 __ cmpptr(tmp, Address(_obj, instanceKlass::init_thread_offset_in_bytes() + sizeof(klassOopDesc))); |
313 __ pop(tmp); | |
0 | 314 __ jcc(Assembler::notEqual, call_patch); |
315 | |
316 // access_field patches may execute the patched code before it's | |
317 // copied back into place so we need to jump back into the main | |
318 // code of the nmethod to continue execution. | |
319 __ jmp(_patch_site_continuation); | |
320 | |
321 // make sure this extra code gets skipped | |
322 bytes_to_skip += __ offset() - offset; | |
323 } | |
324 if (CommentedAssembly) { | |
325 __ block_comment("patch data encoded as movl"); | |
326 } | |
327 // Now emit the patch record telling the runtime how to find the | |
328 // pieces of the patch. We only need 3 bytes but for readability of | |
329 // the disassembly we make the data look like a movl reg, imm32, | |
330 // which requires 5 bytes | |
331 int sizeof_patch_record = 5; | |
332 bytes_to_skip += sizeof_patch_record; | |
333 | |
334 // emit the offsets needed to find the code to patch | |
335 int being_initialized_entry_offset = __ pc() - being_initialized_entry + sizeof_patch_record; | |
336 | |
337 __ a_byte(0xB8); | |
338 __ a_byte(0); | |
339 __ a_byte(being_initialized_entry_offset); | |
340 __ a_byte(bytes_to_skip); | |
341 __ a_byte(_bytes_to_copy); | |
342 address patch_info_pc = __ pc(); | |
343 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info"); | |
344 | |
345 address entry = __ pc(); | |
346 NativeGeneralJump::insert_unconditional((address)_pc_start, entry); | |
347 address target = NULL; | |
348 switch (_id) { | |
349 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break; | |
350 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); break; | |
351 default: ShouldNotReachHere(); | |
352 } | |
353 __ bind(call_patch); | |
354 | |
355 if (CommentedAssembly) { | |
356 __ block_comment("patch entry point"); | |
357 } | |
358 __ call(RuntimeAddress(target)); | |
359 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change"); | |
360 ce->add_call_info_here(_info); | |
361 int jmp_off = __ offset(); | |
362 __ jmp(_patch_site_entry); | |
363 // Add enough nops so deoptimization can overwrite the jmp above with a call | |
364 // and not destroy the world. | |
365 for (int j = __ offset() ; j < jmp_off + 5 ; j++ ) { | |
366 __ nop(); | |
367 } | |
368 if (_id == load_klass_id) { | |
369 CodeSection* cs = __ code_section(); | |
370 RelocIterator iter(cs, (address)_pc_start, (address)(_pc_start + 1)); | |
371 relocInfo::change_reloc_info_for_address(&iter, (address) _pc_start, relocInfo::oop_type, relocInfo::none); | |
372 } | |
373 } | |
374 | |
375 | |
1295 | 376 void DeoptimizeStub::emit_code(LIR_Assembler* ce) { |
377 __ bind(_entry); | |
378 __ call(RuntimeAddress(SharedRuntime::deopt_blob()->unpack_with_reexecution())); | |
379 ce->add_call_info_here(_info); | |
380 debug_only(__ should_not_reach_here()); | |
381 } | |
382 | |
383 | |
0 | 384 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) { |
385 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); | |
386 __ bind(_entry); | |
387 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id))); | |
388 ce->add_call_info_here(_info); | |
389 debug_only(__ should_not_reach_here()); | |
390 } | |
391 | |
392 | |
393 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) { | |
394 assert(__ rsp_offset() == 0, "frame size should be fixed"); | |
395 | |
396 __ bind(_entry); | |
397 // pass the object on stack because all registers must be preserved | |
398 if (_obj->is_cpu_register()) { | |
399 ce->store_parameter(_obj->as_register(), 0); | |
400 } | |
401 __ call(RuntimeAddress(Runtime1::entry_for(_stub))); | |
402 ce->add_call_info_here(_info); | |
403 debug_only(__ should_not_reach_here()); | |
404 } | |
405 | |
406 | |
407 ArrayStoreExceptionStub::ArrayStoreExceptionStub(CodeEmitInfo* info): | |
408 _info(info) { | |
409 } | |
410 | |
411 | |
412 void ArrayStoreExceptionStub::emit_code(LIR_Assembler* ce) { | |
413 assert(__ rsp_offset() == 0, "frame size should be fixed"); | |
414 __ bind(_entry); | |
415 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_array_store_exception_id))); | |
416 ce->add_call_info_here(_info); | |
417 debug_only(__ should_not_reach_here()); | |
418 } | |
419 | |
420 | |
421 void ArrayCopyStub::emit_code(LIR_Assembler* ce) { | |
422 //---------------slow case: call to native----------------- | |
423 __ bind(_entry); | |
424 // Figure out where the args should go | |
425 // This should really convert the IntrinsicID to the methodOop and signature | |
426 // but I don't know how to do that. | |
427 // | |
428 VMRegPair args[5]; | |
429 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT}; | |
430 SharedRuntime::java_calling_convention(signature, args, 5, true); | |
431 | |
432 // push parameters | |
433 // (src, src_pos, dest, destPos, length) | |
434 Register r[5]; | |
435 r[0] = src()->as_register(); | |
436 r[1] = src_pos()->as_register(); | |
437 r[2] = dst()->as_register(); | |
438 r[3] = dst_pos()->as_register(); | |
439 r[4] = length()->as_register(); | |
440 | |
441 // next registers will get stored on the stack | |
442 for (int i = 0; i < 5 ; i++ ) { | |
443 VMReg r_1 = args[i].first(); | |
444 if (r_1->is_stack()) { | |
445 int st_off = r_1->reg2stack() * wordSize; | |
304 | 446 __ movptr (Address(rsp, st_off), r[i]); |
0 | 447 } else { |
448 assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg "); | |
449 } | |
450 } | |
451 | |
452 ce->align_call(lir_static_call); | |
453 | |
454 ce->emit_static_call_stub(); | |
455 AddressLiteral resolve(SharedRuntime::get_resolve_static_call_stub(), | |
456 relocInfo::static_call_type); | |
457 __ call(resolve); | |
458 ce->add_call_info_here(info()); | |
459 | |
460 #ifndef PRODUCT | |
304 | 461 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt)); |
0 | 462 #endif |
463 | |
464 __ jmp(_continuation); | |
465 } | |
466 | |
342 | 467 ///////////////////////////////////////////////////////////////////////////// |
468 #ifndef SERIALGC | |
469 | |
470 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) { | |
471 | |
472 // At this point we know that marking is in progress | |
473 | |
474 __ bind(_entry); | |
475 assert(pre_val()->is_register(), "Precondition."); | |
476 | |
477 Register pre_val_reg = pre_val()->as_register(); | |
478 | |
479 ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false); | |
480 | |
362 | 481 __ cmpptr(pre_val_reg, (int32_t) NULL_WORD); |
342 | 482 __ jcc(Assembler::equal, _continuation); |
483 ce->store_parameter(pre_val()->as_register(), 0); | |
484 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_pre_barrier_slow_id))); | |
485 __ jmp(_continuation); | |
486 | |
487 } | |
488 | |
489 jbyte* G1PostBarrierStub::_byte_map_base = NULL; | |
490 | |
491 jbyte* G1PostBarrierStub::byte_map_base_slow() { | |
492 BarrierSet* bs = Universe::heap()->barrier_set(); | |
493 assert(bs->is_a(BarrierSet::G1SATBCTLogging), | |
494 "Must be if we're using this."); | |
495 return ((G1SATBCardTableModRefBS*)bs)->byte_map_base; | |
496 } | |
497 | |
498 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) { | |
499 __ bind(_entry); | |
500 assert(addr()->is_register(), "Precondition."); | |
501 assert(new_val()->is_register(), "Precondition."); | |
502 Register new_val_reg = new_val()->as_register(); | |
362 | 503 __ cmpptr(new_val_reg, (int32_t) NULL_WORD); |
342 | 504 __ jcc(Assembler::equal, _continuation); |
505 ce->store_parameter(addr()->as_register(), 0); | |
506 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_post_barrier_slow_id))); | |
507 __ jmp(_continuation); | |
508 } | |
509 | |
510 #endif // SERIALGC | |
511 ///////////////////////////////////////////////////////////////////////////// | |
0 | 512 |
513 #undef __ |