Mercurial > hg > truffle
annotate src/cpu/x86/vm/stubGenerator_x86_32.cpp @ 2119:d4fca0a6abde
7011386: race in objArrayKlass::array_klass_impl
Summary: Move _lower_dimension field initialization before _higher_dimension and add storestore barrier.
Reviewed-by: dholmes, iveresov, never
author | kvn |
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date | Tue, 11 Jan 2011 20:26:13 -0800 |
parents | f95d63e2154a |
children | 638119ce7cfd |
rev | line source |
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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 |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "asm/assembler.hpp" | |
27 #include "assembler_x86.inline.hpp" | |
28 #include "interpreter/interpreter.hpp" | |
29 #include "nativeInst_x86.hpp" | |
30 #include "oops/instanceOop.hpp" | |
31 #include "oops/methodOop.hpp" | |
32 #include "oops/objArrayKlass.hpp" | |
33 #include "oops/oop.inline.hpp" | |
34 #include "prims/methodHandles.hpp" | |
35 #include "runtime/frame.inline.hpp" | |
36 #include "runtime/handles.inline.hpp" | |
37 #include "runtime/sharedRuntime.hpp" | |
38 #include "runtime/stubCodeGenerator.hpp" | |
39 #include "runtime/stubRoutines.hpp" | |
40 #include "utilities/top.hpp" | |
41 #ifdef TARGET_OS_FAMILY_linux | |
42 # include "thread_linux.inline.hpp" | |
43 #endif | |
44 #ifdef TARGET_OS_FAMILY_solaris | |
45 # include "thread_solaris.inline.hpp" | |
46 #endif | |
47 #ifdef TARGET_OS_FAMILY_windows | |
48 # include "thread_windows.inline.hpp" | |
49 #endif | |
50 #ifdef COMPILER2 | |
51 #include "opto/runtime.hpp" | |
52 #endif | |
0 | 53 |
54 // Declaration and definition of StubGenerator (no .hpp file). | |
55 // For a more detailed description of the stub routine structure | |
56 // see the comment in stubRoutines.hpp | |
57 | |
58 #define __ _masm-> | |
304 | 59 #define a__ ((Assembler*)_masm)-> |
0 | 60 |
61 #ifdef PRODUCT | |
62 #define BLOCK_COMMENT(str) /* nothing */ | |
63 #else | |
64 #define BLOCK_COMMENT(str) __ block_comment(str) | |
65 #endif | |
66 | |
67 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
68 | |
69 const int MXCSR_MASK = 0xFFC0; // Mask out any pending exceptions | |
70 const int FPU_CNTRL_WRD_MASK = 0xFFFF; | |
71 | |
72 // ------------------------------------------------------------------------------------------------------------------------- | |
73 // Stub Code definitions | |
74 | |
75 static address handle_unsafe_access() { | |
76 JavaThread* thread = JavaThread::current(); | |
77 address pc = thread->saved_exception_pc(); | |
78 // pc is the instruction which we must emulate | |
79 // doing a no-op is fine: return garbage from the load | |
80 // therefore, compute npc | |
81 address npc = Assembler::locate_next_instruction(pc); | |
82 | |
83 // request an async exception | |
84 thread->set_pending_unsafe_access_error(); | |
85 | |
86 // return address of next instruction to execute | |
87 return npc; | |
88 } | |
89 | |
90 class StubGenerator: public StubCodeGenerator { | |
91 private: | |
92 | |
93 #ifdef PRODUCT | |
94 #define inc_counter_np(counter) (0) | |
95 #else | |
96 void inc_counter_np_(int& counter) { | |
304 | 97 __ incrementl(ExternalAddress((address)&counter)); |
0 | 98 } |
99 #define inc_counter_np(counter) \ | |
100 BLOCK_COMMENT("inc_counter " #counter); \ | |
101 inc_counter_np_(counter); | |
102 #endif //PRODUCT | |
103 | |
104 void inc_copy_counter_np(BasicType t) { | |
105 #ifndef PRODUCT | |
106 switch (t) { | |
107 case T_BYTE: inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr); return; | |
108 case T_SHORT: inc_counter_np(SharedRuntime::_jshort_array_copy_ctr); return; | |
109 case T_INT: inc_counter_np(SharedRuntime::_jint_array_copy_ctr); return; | |
110 case T_LONG: inc_counter_np(SharedRuntime::_jlong_array_copy_ctr); return; | |
111 case T_OBJECT: inc_counter_np(SharedRuntime::_oop_array_copy_ctr); return; | |
112 } | |
113 ShouldNotReachHere(); | |
114 #endif //PRODUCT | |
115 } | |
116 | |
117 //------------------------------------------------------------------------------------------------------------------------ | |
118 // Call stubs are used to call Java from C | |
119 // | |
120 // [ return_from_Java ] <--- rsp | |
121 // [ argument word n ] | |
122 // ... | |
123 // -N [ argument word 1 ] | |
124 // -7 [ Possible padding for stack alignment ] | |
125 // -6 [ Possible padding for stack alignment ] | |
126 // -5 [ Possible padding for stack alignment ] | |
127 // -4 [ mxcsr save ] <--- rsp_after_call | |
128 // -3 [ saved rbx, ] | |
129 // -2 [ saved rsi ] | |
130 // -1 [ saved rdi ] | |
131 // 0 [ saved rbp, ] <--- rbp, | |
132 // 1 [ return address ] | |
133 // 2 [ ptr. to call wrapper ] | |
134 // 3 [ result ] | |
135 // 4 [ result_type ] | |
136 // 5 [ method ] | |
137 // 6 [ entry_point ] | |
138 // 7 [ parameters ] | |
139 // 8 [ parameter_size ] | |
140 // 9 [ thread ] | |
141 | |
142 | |
143 address generate_call_stub(address& return_address) { | |
144 StubCodeMark mark(this, "StubRoutines", "call_stub"); | |
145 address start = __ pc(); | |
146 | |
147 // stub code parameters / addresses | |
148 assert(frame::entry_frame_call_wrapper_offset == 2, "adjust this code"); | |
149 bool sse_save = false; | |
150 const Address rsp_after_call(rbp, -4 * wordSize); // same as in generate_catch_exception()! | |
151 const int locals_count_in_bytes (4*wordSize); | |
152 const Address mxcsr_save (rbp, -4 * wordSize); | |
153 const Address saved_rbx (rbp, -3 * wordSize); | |
154 const Address saved_rsi (rbp, -2 * wordSize); | |
155 const Address saved_rdi (rbp, -1 * wordSize); | |
156 const Address result (rbp, 3 * wordSize); | |
157 const Address result_type (rbp, 4 * wordSize); | |
158 const Address method (rbp, 5 * wordSize); | |
159 const Address entry_point (rbp, 6 * wordSize); | |
160 const Address parameters (rbp, 7 * wordSize); | |
161 const Address parameter_size(rbp, 8 * wordSize); | |
162 const Address thread (rbp, 9 * wordSize); // same as in generate_catch_exception()! | |
163 sse_save = UseSSE > 0; | |
164 | |
165 // stub code | |
166 __ enter(); | |
304 | 167 __ movptr(rcx, parameter_size); // parameter counter |
1506 | 168 __ shlptr(rcx, Interpreter::logStackElementSize); // convert parameter count to bytes |
304 | 169 __ addptr(rcx, locals_count_in_bytes); // reserve space for register saves |
170 __ subptr(rsp, rcx); | |
171 __ andptr(rsp, -(StackAlignmentInBytes)); // Align stack | |
0 | 172 |
173 // save rdi, rsi, & rbx, according to C calling conventions | |
304 | 174 __ movptr(saved_rdi, rdi); |
175 __ movptr(saved_rsi, rsi); | |
176 __ movptr(saved_rbx, rbx); | |
0 | 177 // save and initialize %mxcsr |
178 if (sse_save) { | |
179 Label skip_ldmx; | |
180 __ stmxcsr(mxcsr_save); | |
181 __ movl(rax, mxcsr_save); | |
182 __ andl(rax, MXCSR_MASK); // Only check control and mask bits | |
183 ExternalAddress mxcsr_std(StubRoutines::addr_mxcsr_std()); | |
184 __ cmp32(rax, mxcsr_std); | |
185 __ jcc(Assembler::equal, skip_ldmx); | |
186 __ ldmxcsr(mxcsr_std); | |
187 __ bind(skip_ldmx); | |
188 } | |
189 | |
190 // make sure the control word is correct. | |
191 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); | |
192 | |
193 #ifdef ASSERT | |
194 // make sure we have no pending exceptions | |
195 { Label L; | |
304 | 196 __ movptr(rcx, thread); |
197 __ cmpptr(Address(rcx, Thread::pending_exception_offset()), (int32_t)NULL_WORD); | |
0 | 198 __ jcc(Assembler::equal, L); |
199 __ stop("StubRoutines::call_stub: entered with pending exception"); | |
200 __ bind(L); | |
201 } | |
202 #endif | |
203 | |
204 // pass parameters if any | |
205 BLOCK_COMMENT("pass parameters if any"); | |
206 Label parameters_done; | |
207 __ movl(rcx, parameter_size); // parameter counter | |
208 __ testl(rcx, rcx); | |
209 __ jcc(Assembler::zero, parameters_done); | |
210 | |
211 // parameter passing loop | |
212 | |
213 Label loop; | |
214 // Copy Java parameters in reverse order (receiver last) | |
215 // Note that the argument order is inverted in the process | |
216 // source is rdx[rcx: N-1..0] | |
217 // dest is rsp[rbx: 0..N-1] | |
218 | |
304 | 219 __ movptr(rdx, parameters); // parameter pointer |
220 __ xorptr(rbx, rbx); | |
0 | 221 |
222 __ BIND(loop); | |
223 | |
224 // get parameter | |
304 | 225 __ movptr(rax, Address(rdx, rcx, Interpreter::stackElementScale(), -wordSize)); |
226 __ movptr(Address(rsp, rbx, Interpreter::stackElementScale(), | |
0 | 227 Interpreter::expr_offset_in_bytes(0)), rax); // store parameter |
228 __ increment(rbx); | |
229 __ decrement(rcx); | |
230 __ jcc(Assembler::notZero, loop); | |
231 | |
232 // call Java function | |
233 __ BIND(parameters_done); | |
304 | 234 __ movptr(rbx, method); // get methodOop |
235 __ movptr(rax, entry_point); // get entry_point | |
236 __ mov(rsi, rsp); // set sender sp | |
0 | 237 BLOCK_COMMENT("call Java function"); |
238 __ call(rax); | |
239 | |
240 BLOCK_COMMENT("call_stub_return_address:"); | |
241 return_address = __ pc(); | |
242 | |
243 Label common_return; | |
244 | |
245 __ BIND(common_return); | |
246 | |
247 // store result depending on type | |
248 // (everything that is not T_LONG, T_FLOAT or T_DOUBLE is treated as T_INT) | |
304 | 249 __ movptr(rdi, result); |
0 | 250 Label is_long, is_float, is_double, exit; |
251 __ movl(rsi, result_type); | |
252 __ cmpl(rsi, T_LONG); | |
253 __ jcc(Assembler::equal, is_long); | |
254 __ cmpl(rsi, T_FLOAT); | |
255 __ jcc(Assembler::equal, is_float); | |
256 __ cmpl(rsi, T_DOUBLE); | |
257 __ jcc(Assembler::equal, is_double); | |
258 | |
259 // handle T_INT case | |
260 __ movl(Address(rdi, 0), rax); | |
261 __ BIND(exit); | |
262 | |
263 // check that FPU stack is empty | |
264 __ verify_FPU(0, "generate_call_stub"); | |
265 | |
266 // pop parameters | |
304 | 267 __ lea(rsp, rsp_after_call); |
0 | 268 |
269 // restore %mxcsr | |
270 if (sse_save) { | |
271 __ ldmxcsr(mxcsr_save); | |
272 } | |
273 | |
274 // restore rdi, rsi and rbx, | |
304 | 275 __ movptr(rbx, saved_rbx); |
276 __ movptr(rsi, saved_rsi); | |
277 __ movptr(rdi, saved_rdi); | |
278 __ addptr(rsp, 4*wordSize); | |
0 | 279 |
280 // return | |
304 | 281 __ pop(rbp); |
0 | 282 __ ret(0); |
283 | |
284 // handle return types different from T_INT | |
285 __ BIND(is_long); | |
286 __ movl(Address(rdi, 0 * wordSize), rax); | |
287 __ movl(Address(rdi, 1 * wordSize), rdx); | |
288 __ jmp(exit); | |
289 | |
290 __ BIND(is_float); | |
291 // interpreter uses xmm0 for return values | |
292 if (UseSSE >= 1) { | |
293 __ movflt(Address(rdi, 0), xmm0); | |
294 } else { | |
295 __ fstp_s(Address(rdi, 0)); | |
296 } | |
297 __ jmp(exit); | |
298 | |
299 __ BIND(is_double); | |
300 // interpreter uses xmm0 for return values | |
301 if (UseSSE >= 2) { | |
302 __ movdbl(Address(rdi, 0), xmm0); | |
303 } else { | |
304 __ fstp_d(Address(rdi, 0)); | |
305 } | |
306 __ jmp(exit); | |
307 | |
308 // If we call compiled code directly from the call stub we will | |
309 // need to adjust the return back to the call stub to a specialized | |
310 // piece of code that can handle compiled results and cleaning the fpu | |
311 // stack. compiled code will be set to return here instead of the | |
312 // return above that handles interpreter returns. | |
313 | |
314 BLOCK_COMMENT("call_stub_compiled_return:"); | |
304 | 315 StubRoutines::x86::set_call_stub_compiled_return( __ pc()); |
0 | 316 |
317 #ifdef COMPILER2 | |
318 if (UseSSE >= 2) { | |
319 __ verify_FPU(0, "call_stub_compiled_return"); | |
320 } else { | |
321 for (int i = 1; i < 8; i++) { | |
322 __ ffree(i); | |
323 } | |
324 | |
325 // UseSSE <= 1 so double result should be left on TOS | |
326 __ movl(rsi, result_type); | |
327 __ cmpl(rsi, T_DOUBLE); | |
328 __ jcc(Assembler::equal, common_return); | |
329 if (UseSSE == 0) { | |
330 // UseSSE == 0 so float result should be left on TOS | |
331 __ cmpl(rsi, T_FLOAT); | |
332 __ jcc(Assembler::equal, common_return); | |
333 } | |
334 __ ffree(0); | |
335 } | |
336 #endif /* COMPILER2 */ | |
337 __ jmp(common_return); | |
338 | |
339 return start; | |
340 } | |
341 | |
342 | |
343 //------------------------------------------------------------------------------------------------------------------------ | |
344 // Return point for a Java call if there's an exception thrown in Java code. | |
345 // The exception is caught and transformed into a pending exception stored in | |
346 // JavaThread that can be tested from within the VM. | |
347 // | |
348 // Note: Usually the parameters are removed by the callee. In case of an exception | |
349 // crossing an activation frame boundary, that is not the case if the callee | |
350 // is compiled code => need to setup the rsp. | |
351 // | |
352 // rax,: exception oop | |
353 | |
354 address generate_catch_exception() { | |
355 StubCodeMark mark(this, "StubRoutines", "catch_exception"); | |
356 const Address rsp_after_call(rbp, -4 * wordSize); // same as in generate_call_stub()! | |
357 const Address thread (rbp, 9 * wordSize); // same as in generate_call_stub()! | |
358 address start = __ pc(); | |
359 | |
360 // get thread directly | |
304 | 361 __ movptr(rcx, thread); |
0 | 362 #ifdef ASSERT |
363 // verify that threads correspond | |
364 { Label L; | |
365 __ get_thread(rbx); | |
304 | 366 __ cmpptr(rbx, rcx); |
0 | 367 __ jcc(Assembler::equal, L); |
368 __ stop("StubRoutines::catch_exception: threads must correspond"); | |
369 __ bind(L); | |
370 } | |
371 #endif | |
372 // set pending exception | |
373 __ verify_oop(rax); | |
304 | 374 __ movptr(Address(rcx, Thread::pending_exception_offset()), rax ); |
0 | 375 __ lea(Address(rcx, Thread::exception_file_offset ()), |
376 ExternalAddress((address)__FILE__)); | |
377 __ movl(Address(rcx, Thread::exception_line_offset ()), __LINE__ ); | |
378 // complete return to VM | |
379 assert(StubRoutines::_call_stub_return_address != NULL, "_call_stub_return_address must have been generated before"); | |
380 __ jump(RuntimeAddress(StubRoutines::_call_stub_return_address)); | |
381 | |
382 return start; | |
383 } | |
384 | |
385 | |
386 //------------------------------------------------------------------------------------------------------------------------ | |
387 // Continuation point for runtime calls returning with a pending exception. | |
388 // The pending exception check happened in the runtime or native call stub. | |
389 // The pending exception in Thread is converted into a Java-level exception. | |
390 // | |
391 // Contract with Java-level exception handlers: | |
1295 | 392 // rax: exception |
0 | 393 // rdx: throwing pc |
394 // | |
395 // NOTE: At entry of this stub, exception-pc must be on stack !! | |
396 | |
397 address generate_forward_exception() { | |
398 StubCodeMark mark(this, "StubRoutines", "forward exception"); | |
399 address start = __ pc(); | |
1295 | 400 const Register thread = rcx; |
401 | |
402 // other registers used in this stub | |
403 const Register exception_oop = rax; | |
404 const Register handler_addr = rbx; | |
405 const Register exception_pc = rdx; | |
0 | 406 |
407 // Upon entry, the sp points to the return address returning into Java | |
408 // (interpreted or compiled) code; i.e., the return address becomes the | |
409 // throwing pc. | |
410 // | |
411 // Arguments pushed before the runtime call are still on the stack but | |
412 // the exception handler will reset the stack pointer -> ignore them. | |
413 // A potential result in registers can be ignored as well. | |
414 | |
415 #ifdef ASSERT | |
416 // make sure this code is only executed if there is a pending exception | |
417 { Label L; | |
1295 | 418 __ get_thread(thread); |
419 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); | |
0 | 420 __ jcc(Assembler::notEqual, L); |
421 __ stop("StubRoutines::forward exception: no pending exception (1)"); | |
422 __ bind(L); | |
423 } | |
424 #endif | |
425 | |
426 // compute exception handler into rbx, | |
1295 | 427 __ get_thread(thread); |
428 __ movptr(exception_pc, Address(rsp, 0)); | |
0 | 429 BLOCK_COMMENT("call exception_handler_for_return_address"); |
1295 | 430 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), thread, exception_pc); |
431 __ mov(handler_addr, rax); | |
0 | 432 |
1295 | 433 // setup rax & rdx, remove return address & clear pending exception |
434 __ get_thread(thread); | |
435 __ pop(exception_pc); | |
436 __ movptr(exception_oop, Address(thread, Thread::pending_exception_offset())); | |
437 __ movptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD); | |
0 | 438 |
439 #ifdef ASSERT | |
440 // make sure exception is set | |
441 { Label L; | |
1295 | 442 __ testptr(exception_oop, exception_oop); |
0 | 443 __ jcc(Assembler::notEqual, L); |
444 __ stop("StubRoutines::forward exception: no pending exception (2)"); | |
445 __ bind(L); | |
446 } | |
447 #endif | |
448 | |
1295 | 449 // Verify that there is really a valid exception in RAX. |
450 __ verify_oop(exception_oop); | |
451 | |
452 // Restore SP from BP if the exception PC is a MethodHandle call site. | |
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453 __ cmpl(Address(thread, JavaThread::is_method_handle_return_offset()), 0); |
1295 | 454 __ cmovptr(Assembler::notEqual, rsp, rbp); |
455 | |
0 | 456 // continue at exception handler (return address removed) |
1295 | 457 // rax: exception |
458 // rbx: exception handler | |
0 | 459 // rdx: throwing pc |
1295 | 460 __ jmp(handler_addr); |
0 | 461 |
462 return start; | |
463 } | |
464 | |
465 | |
466 //---------------------------------------------------------------------------------------------------- | |
467 // Support for jint Atomic::xchg(jint exchange_value, volatile jint* dest) | |
468 // | |
469 // xchg exists as far back as 8086, lock needed for MP only | |
470 // Stack layout immediately after call: | |
471 // | |
472 // 0 [ret addr ] <--- rsp | |
473 // 1 [ ex ] | |
474 // 2 [ dest ] | |
475 // | |
476 // Result: *dest <- ex, return (old *dest) | |
477 // | |
478 // Note: win32 does not currently use this code | |
479 | |
480 address generate_atomic_xchg() { | |
481 StubCodeMark mark(this, "StubRoutines", "atomic_xchg"); | |
482 address start = __ pc(); | |
483 | |
304 | 484 __ push(rdx); |
0 | 485 Address exchange(rsp, 2 * wordSize); |
486 Address dest_addr(rsp, 3 * wordSize); | |
487 __ movl(rax, exchange); | |
304 | 488 __ movptr(rdx, dest_addr); |
489 __ xchgl(rax, Address(rdx, 0)); | |
490 __ pop(rdx); | |
0 | 491 __ ret(0); |
492 | |
493 return start; | |
494 } | |
495 | |
496 //---------------------------------------------------------------------------------------------------- | |
497 // Support for void verify_mxcsr() | |
498 // | |
499 // This routine is used with -Xcheck:jni to verify that native | |
500 // JNI code does not return to Java code without restoring the | |
501 // MXCSR register to our expected state. | |
502 | |
503 | |
504 address generate_verify_mxcsr() { | |
505 StubCodeMark mark(this, "StubRoutines", "verify_mxcsr"); | |
506 address start = __ pc(); | |
507 | |
508 const Address mxcsr_save(rsp, 0); | |
509 | |
510 if (CheckJNICalls && UseSSE > 0 ) { | |
511 Label ok_ret; | |
512 ExternalAddress mxcsr_std(StubRoutines::addr_mxcsr_std()); | |
304 | 513 __ push(rax); |
514 __ subptr(rsp, wordSize); // allocate a temp location | |
0 | 515 __ stmxcsr(mxcsr_save); |
516 __ movl(rax, mxcsr_save); | |
517 __ andl(rax, MXCSR_MASK); | |
518 __ cmp32(rax, mxcsr_std); | |
519 __ jcc(Assembler::equal, ok_ret); | |
520 | |
521 __ warn("MXCSR changed by native JNI code."); | |
522 | |
523 __ ldmxcsr(mxcsr_std); | |
524 | |
525 __ bind(ok_ret); | |
304 | 526 __ addptr(rsp, wordSize); |
527 __ pop(rax); | |
0 | 528 } |
529 | |
530 __ ret(0); | |
531 | |
532 return start; | |
533 } | |
534 | |
535 | |
536 //--------------------------------------------------------------------------- | |
537 // Support for void verify_fpu_cntrl_wrd() | |
538 // | |
539 // This routine is used with -Xcheck:jni to verify that native | |
540 // JNI code does not return to Java code without restoring the | |
541 // FP control word to our expected state. | |
542 | |
543 address generate_verify_fpu_cntrl_wrd() { | |
544 StubCodeMark mark(this, "StubRoutines", "verify_spcw"); | |
545 address start = __ pc(); | |
546 | |
547 const Address fpu_cntrl_wrd_save(rsp, 0); | |
548 | |
549 if (CheckJNICalls) { | |
550 Label ok_ret; | |
304 | 551 __ push(rax); |
552 __ subptr(rsp, wordSize); // allocate a temp location | |
0 | 553 __ fnstcw(fpu_cntrl_wrd_save); |
554 __ movl(rax, fpu_cntrl_wrd_save); | |
555 __ andl(rax, FPU_CNTRL_WRD_MASK); | |
556 ExternalAddress fpu_std(StubRoutines::addr_fpu_cntrl_wrd_std()); | |
557 __ cmp32(rax, fpu_std); | |
558 __ jcc(Assembler::equal, ok_ret); | |
559 | |
560 __ warn("Floating point control word changed by native JNI code."); | |
561 | |
562 __ fldcw(fpu_std); | |
563 | |
564 __ bind(ok_ret); | |
304 | 565 __ addptr(rsp, wordSize); |
566 __ pop(rax); | |
0 | 567 } |
568 | |
569 __ ret(0); | |
570 | |
571 return start; | |
572 } | |
573 | |
574 //--------------------------------------------------------------------------- | |
575 // Wrapper for slow-case handling of double-to-integer conversion | |
576 // d2i or f2i fast case failed either because it is nan or because | |
577 // of under/overflow. | |
578 // Input: FPU TOS: float value | |
579 // Output: rax, (rdx): integer (long) result | |
580 | |
581 address generate_d2i_wrapper(BasicType t, address fcn) { | |
582 StubCodeMark mark(this, "StubRoutines", "d2i_wrapper"); | |
583 address start = __ pc(); | |
584 | |
585 // Capture info about frame layout | |
586 enum layout { FPUState_off = 0, | |
587 rbp_off = FPUStateSizeInWords, | |
588 rdi_off, | |
589 rsi_off, | |
590 rcx_off, | |
591 rbx_off, | |
592 saved_argument_off, | |
593 saved_argument_off2, // 2nd half of double | |
594 framesize | |
595 }; | |
596 | |
597 assert(FPUStateSizeInWords == 27, "update stack layout"); | |
598 | |
599 // Save outgoing argument to stack across push_FPU_state() | |
304 | 600 __ subptr(rsp, wordSize * 2); |
0 | 601 __ fstp_d(Address(rsp, 0)); |
602 | |
603 // Save CPU & FPU state | |
304 | 604 __ push(rbx); |
605 __ push(rcx); | |
606 __ push(rsi); | |
607 __ push(rdi); | |
608 __ push(rbp); | |
0 | 609 __ push_FPU_state(); |
610 | |
611 // push_FPU_state() resets the FP top of stack | |
612 // Load original double into FP top of stack | |
613 __ fld_d(Address(rsp, saved_argument_off * wordSize)); | |
614 // Store double into stack as outgoing argument | |
304 | 615 __ subptr(rsp, wordSize*2); |
0 | 616 __ fst_d(Address(rsp, 0)); |
617 | |
618 // Prepare FPU for doing math in C-land | |
619 __ empty_FPU_stack(); | |
620 // Call the C code to massage the double. Result in EAX | |
621 if (t == T_INT) | |
622 { BLOCK_COMMENT("SharedRuntime::d2i"); } | |
623 else if (t == T_LONG) | |
624 { BLOCK_COMMENT("SharedRuntime::d2l"); } | |
625 __ call_VM_leaf( fcn, 2 ); | |
626 | |
627 // Restore CPU & FPU state | |
628 __ pop_FPU_state(); | |
304 | 629 __ pop(rbp); |
630 __ pop(rdi); | |
631 __ pop(rsi); | |
632 __ pop(rcx); | |
633 __ pop(rbx); | |
634 __ addptr(rsp, wordSize * 2); | |
0 | 635 |
636 __ ret(0); | |
637 | |
638 return start; | |
639 } | |
640 | |
641 | |
642 //--------------------------------------------------------------------------- | |
643 // The following routine generates a subroutine to throw an asynchronous | |
644 // UnknownError when an unsafe access gets a fault that could not be | |
645 // reasonably prevented by the programmer. (Example: SIGBUS/OBJERR.) | |
646 address generate_handler_for_unsafe_access() { | |
647 StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access"); | |
648 address start = __ pc(); | |
649 | |
304 | 650 __ push(0); // hole for return address-to-be |
651 __ pusha(); // push registers | |
0 | 652 Address next_pc(rsp, RegisterImpl::number_of_registers * BytesPerWord); |
653 BLOCK_COMMENT("call handle_unsafe_access"); | |
654 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, handle_unsafe_access))); | |
304 | 655 __ movptr(next_pc, rax); // stuff next address |
656 __ popa(); | |
0 | 657 __ ret(0); // jump to next address |
658 | |
659 return start; | |
660 } | |
661 | |
662 | |
663 //---------------------------------------------------------------------------------------------------- | |
664 // Non-destructive plausibility checks for oops | |
665 | |
666 address generate_verify_oop() { | |
667 StubCodeMark mark(this, "StubRoutines", "verify_oop"); | |
668 address start = __ pc(); | |
669 | |
670 // Incoming arguments on stack after saving rax,: | |
671 // | |
672 // [tos ]: saved rdx | |
673 // [tos + 1]: saved EFLAGS | |
674 // [tos + 2]: return address | |
675 // [tos + 3]: char* error message | |
676 // [tos + 4]: oop object to verify | |
677 // [tos + 5]: saved rax, - saved by caller and bashed | |
678 | |
679 Label exit, error; | |
304 | 680 __ pushf(); |
681 __ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr())); | |
682 __ push(rdx); // save rdx | |
0 | 683 // make sure object is 'reasonable' |
304 | 684 __ movptr(rax, Address(rsp, 4 * wordSize)); // get object |
685 __ testptr(rax, rax); | |
0 | 686 __ jcc(Assembler::zero, exit); // if obj is NULL it is ok |
687 | |
688 // Check if the oop is in the right area of memory | |
689 const int oop_mask = Universe::verify_oop_mask(); | |
690 const int oop_bits = Universe::verify_oop_bits(); | |
304 | 691 __ mov(rdx, rax); |
692 __ andptr(rdx, oop_mask); | |
693 __ cmpptr(rdx, oop_bits); | |
0 | 694 __ jcc(Assembler::notZero, error); |
695 | |
696 // make sure klass is 'reasonable' | |
304 | 697 __ movptr(rax, Address(rax, oopDesc::klass_offset_in_bytes())); // get klass |
698 __ testptr(rax, rax); | |
0 | 699 __ jcc(Assembler::zero, error); // if klass is NULL it is broken |
700 | |
701 // Check if the klass is in the right area of memory | |
702 const int klass_mask = Universe::verify_klass_mask(); | |
703 const int klass_bits = Universe::verify_klass_bits(); | |
304 | 704 __ mov(rdx, rax); |
705 __ andptr(rdx, klass_mask); | |
706 __ cmpptr(rdx, klass_bits); | |
0 | 707 __ jcc(Assembler::notZero, error); |
708 | |
709 // make sure klass' klass is 'reasonable' | |
304 | 710 __ movptr(rax, Address(rax, oopDesc::klass_offset_in_bytes())); // get klass' klass |
711 __ testptr(rax, rax); | |
0 | 712 __ jcc(Assembler::zero, error); // if klass' klass is NULL it is broken |
713 | |
304 | 714 __ mov(rdx, rax); |
715 __ andptr(rdx, klass_mask); | |
716 __ cmpptr(rdx, klass_bits); | |
0 | 717 __ jcc(Assembler::notZero, error); // if klass not in right area |
718 // of memory it is broken too. | |
719 | |
720 // return if everything seems ok | |
721 __ bind(exit); | |
304 | 722 __ movptr(rax, Address(rsp, 5 * wordSize)); // get saved rax, back |
723 __ pop(rdx); // restore rdx | |
724 __ popf(); // restore EFLAGS | |
0 | 725 __ ret(3 * wordSize); // pop arguments |
726 | |
727 // handle errors | |
728 __ bind(error); | |
304 | 729 __ movptr(rax, Address(rsp, 5 * wordSize)); // get saved rax, back |
730 __ pop(rdx); // get saved rdx back | |
731 __ popf(); // get saved EFLAGS off stack -- will be ignored | |
732 __ pusha(); // push registers (eip = return address & msg are already pushed) | |
0 | 733 BLOCK_COMMENT("call MacroAssembler::debug"); |
304 | 734 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32))); |
735 __ popa(); | |
0 | 736 __ ret(3 * wordSize); // pop arguments |
737 return start; | |
738 } | |
739 | |
740 // | |
741 // Generate pre-barrier for array stores | |
742 // | |
743 // Input: | |
744 // start - starting address | |
845
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745 // count - element count |
0 | 746 void gen_write_ref_array_pre_barrier(Register start, Register count) { |
747 assert_different_registers(start, count); | |
748 BarrierSet* bs = Universe::heap()->barrier_set(); | |
749 switch (bs->kind()) { | |
750 case BarrierSet::G1SATBCT: | |
751 case BarrierSet::G1SATBCTLogging: | |
752 { | |
304 | 753 __ pusha(); // push registers |
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754 __ call_VM_leaf(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_pre), |
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755 start, count); |
304 | 756 __ popa(); |
0 | 757 } |
758 break; | |
759 case BarrierSet::CardTableModRef: | |
760 case BarrierSet::CardTableExtension: | |
761 case BarrierSet::ModRef: | |
762 break; | |
763 default : | |
764 ShouldNotReachHere(); | |
765 | |
766 } | |
767 } | |
768 | |
769 | |
770 // | |
771 // Generate a post-barrier for an array store | |
772 // | |
773 // start - starting address | |
774 // count - element count | |
775 // | |
776 // The two input registers are overwritten. | |
777 // | |
778 void gen_write_ref_array_post_barrier(Register start, Register count) { | |
779 BarrierSet* bs = Universe::heap()->barrier_set(); | |
780 assert_different_registers(start, count); | |
781 switch (bs->kind()) { | |
782 case BarrierSet::G1SATBCT: | |
783 case BarrierSet::G1SATBCTLogging: | |
784 { | |
304 | 785 __ pusha(); // push registers |
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786 __ call_VM_leaf(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_post), |
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787 start, count); |
304 | 788 __ popa(); |
0 | 789 } |
790 break; | |
791 | |
792 case BarrierSet::CardTableModRef: | |
793 case BarrierSet::CardTableExtension: | |
794 { | |
795 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
796 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
797 | |
798 Label L_loop; | |
799 const Register end = count; // elements count; end == start+count-1 | |
800 assert_different_registers(start, end); | |
801 | |
304 | 802 __ lea(end, Address(start, count, Address::times_ptr, -wordSize)); |
803 __ shrptr(start, CardTableModRefBS::card_shift); | |
804 __ shrptr(end, CardTableModRefBS::card_shift); | |
805 __ subptr(end, start); // end --> count | |
0 | 806 __ BIND(L_loop); |
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807 intptr_t disp = (intptr_t) ct->byte_map_base; |
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808 Address cardtable(start, count, Address::times_1, disp); |
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809 __ movb(cardtable, 0); |
0 | 810 __ decrement(count); |
811 __ jcc(Assembler::greaterEqual, L_loop); | |
812 } | |
813 break; | |
814 case BarrierSet::ModRef: | |
815 break; | |
816 default : | |
817 ShouldNotReachHere(); | |
818 | |
819 } | |
820 } | |
821 | |
405 | 822 |
823 // Copy 64 bytes chunks | |
824 // | |
825 // Inputs: | |
826 // from - source array address | |
827 // to_from - destination array address - from | |
828 // qword_count - 8-bytes element count, negative | |
829 // | |
830 void xmm_copy_forward(Register from, Register to_from, Register qword_count) { | |
831 assert( UseSSE >= 2, "supported cpu only" ); | |
832 Label L_copy_64_bytes_loop, L_copy_64_bytes, L_copy_8_bytes, L_exit; | |
833 // Copy 64-byte chunks | |
834 __ jmpb(L_copy_64_bytes); | |
1365 | 835 __ align(OptoLoopAlignment); |
405 | 836 __ BIND(L_copy_64_bytes_loop); |
837 | |
838 if(UseUnalignedLoadStores) { | |
839 __ movdqu(xmm0, Address(from, 0)); | |
840 __ movdqu(Address(from, to_from, Address::times_1, 0), xmm0); | |
841 __ movdqu(xmm1, Address(from, 16)); | |
842 __ movdqu(Address(from, to_from, Address::times_1, 16), xmm1); | |
843 __ movdqu(xmm2, Address(from, 32)); | |
844 __ movdqu(Address(from, to_from, Address::times_1, 32), xmm2); | |
845 __ movdqu(xmm3, Address(from, 48)); | |
846 __ movdqu(Address(from, to_from, Address::times_1, 48), xmm3); | |
847 | |
848 } else { | |
849 __ movq(xmm0, Address(from, 0)); | |
850 __ movq(Address(from, to_from, Address::times_1, 0), xmm0); | |
851 __ movq(xmm1, Address(from, 8)); | |
852 __ movq(Address(from, to_from, Address::times_1, 8), xmm1); | |
853 __ movq(xmm2, Address(from, 16)); | |
854 __ movq(Address(from, to_from, Address::times_1, 16), xmm2); | |
855 __ movq(xmm3, Address(from, 24)); | |
856 __ movq(Address(from, to_from, Address::times_1, 24), xmm3); | |
857 __ movq(xmm4, Address(from, 32)); | |
858 __ movq(Address(from, to_from, Address::times_1, 32), xmm4); | |
859 __ movq(xmm5, Address(from, 40)); | |
860 __ movq(Address(from, to_from, Address::times_1, 40), xmm5); | |
861 __ movq(xmm6, Address(from, 48)); | |
862 __ movq(Address(from, to_from, Address::times_1, 48), xmm6); | |
863 __ movq(xmm7, Address(from, 56)); | |
864 __ movq(Address(from, to_from, Address::times_1, 56), xmm7); | |
865 } | |
866 | |
867 __ addl(from, 64); | |
868 __ BIND(L_copy_64_bytes); | |
869 __ subl(qword_count, 8); | |
870 __ jcc(Assembler::greaterEqual, L_copy_64_bytes_loop); | |
871 __ addl(qword_count, 8); | |
872 __ jccb(Assembler::zero, L_exit); | |
873 // | |
874 // length is too short, just copy qwords | |
875 // | |
876 __ BIND(L_copy_8_bytes); | |
877 __ movq(xmm0, Address(from, 0)); | |
878 __ movq(Address(from, to_from, Address::times_1), xmm0); | |
879 __ addl(from, 8); | |
880 __ decrement(qword_count); | |
881 __ jcc(Assembler::greater, L_copy_8_bytes); | |
882 __ BIND(L_exit); | |
883 } | |
884 | |
0 | 885 // Copy 64 bytes chunks |
886 // | |
887 // Inputs: | |
888 // from - source array address | |
889 // to_from - destination array address - from | |
890 // qword_count - 8-bytes element count, negative | |
891 // | |
892 void mmx_copy_forward(Register from, Register to_from, Register qword_count) { | |
405 | 893 assert( VM_Version::supports_mmx(), "supported cpu only" ); |
0 | 894 Label L_copy_64_bytes_loop, L_copy_64_bytes, L_copy_8_bytes, L_exit; |
895 // Copy 64-byte chunks | |
896 __ jmpb(L_copy_64_bytes); | |
1365 | 897 __ align(OptoLoopAlignment); |
0 | 898 __ BIND(L_copy_64_bytes_loop); |
899 __ movq(mmx0, Address(from, 0)); | |
900 __ movq(mmx1, Address(from, 8)); | |
901 __ movq(mmx2, Address(from, 16)); | |
902 __ movq(Address(from, to_from, Address::times_1, 0), mmx0); | |
903 __ movq(mmx3, Address(from, 24)); | |
904 __ movq(Address(from, to_from, Address::times_1, 8), mmx1); | |
905 __ movq(mmx4, Address(from, 32)); | |
906 __ movq(Address(from, to_from, Address::times_1, 16), mmx2); | |
907 __ movq(mmx5, Address(from, 40)); | |
908 __ movq(Address(from, to_from, Address::times_1, 24), mmx3); | |
909 __ movq(mmx6, Address(from, 48)); | |
910 __ movq(Address(from, to_from, Address::times_1, 32), mmx4); | |
911 __ movq(mmx7, Address(from, 56)); | |
912 __ movq(Address(from, to_from, Address::times_1, 40), mmx5); | |
913 __ movq(Address(from, to_from, Address::times_1, 48), mmx6); | |
914 __ movq(Address(from, to_from, Address::times_1, 56), mmx7); | |
304 | 915 __ addptr(from, 64); |
0 | 916 __ BIND(L_copy_64_bytes); |
917 __ subl(qword_count, 8); | |
918 __ jcc(Assembler::greaterEqual, L_copy_64_bytes_loop); | |
919 __ addl(qword_count, 8); | |
920 __ jccb(Assembler::zero, L_exit); | |
921 // | |
922 // length is too short, just copy qwords | |
923 // | |
924 __ BIND(L_copy_8_bytes); | |
925 __ movq(mmx0, Address(from, 0)); | |
926 __ movq(Address(from, to_from, Address::times_1), mmx0); | |
304 | 927 __ addptr(from, 8); |
0 | 928 __ decrement(qword_count); |
929 __ jcc(Assembler::greater, L_copy_8_bytes); | |
930 __ BIND(L_exit); | |
931 __ emms(); | |
932 } | |
933 | |
934 address generate_disjoint_copy(BasicType t, bool aligned, | |
935 Address::ScaleFactor sf, | |
936 address* entry, const char *name) { | |
937 __ align(CodeEntryAlignment); | |
938 StubCodeMark mark(this, "StubRoutines", name); | |
939 address start = __ pc(); | |
940 | |
941 Label L_0_count, L_exit, L_skip_align1, L_skip_align2, L_copy_byte; | |
942 Label L_copy_2_bytes, L_copy_4_bytes, L_copy_64_bytes; | |
943 | |
304 | 944 int shift = Address::times_ptr - sf; |
0 | 945 |
946 const Register from = rsi; // source array address | |
947 const Register to = rdi; // destination array address | |
948 const Register count = rcx; // elements count | |
949 const Register to_from = to; // (to - from) | |
950 const Register saved_to = rdx; // saved destination array address | |
951 | |
952 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 953 __ push(rsi); |
954 __ push(rdi); | |
955 __ movptr(from , Address(rsp, 12+ 4)); | |
956 __ movptr(to , Address(rsp, 12+ 8)); | |
0 | 957 __ movl(count, Address(rsp, 12+ 12)); |
958 if (t == T_OBJECT) { | |
959 __ testl(count, count); | |
960 __ jcc(Assembler::zero, L_0_count); | |
961 gen_write_ref_array_pre_barrier(to, count); | |
304 | 962 __ mov(saved_to, to); // save 'to' |
0 | 963 } |
964 | |
965 *entry = __ pc(); // Entry point from conjoint arraycopy stub. | |
966 BLOCK_COMMENT("Entry:"); | |
967 | |
304 | 968 __ subptr(to, from); // to --> to_from |
0 | 969 __ cmpl(count, 2<<shift); // Short arrays (< 8 bytes) copy by element |
970 __ jcc(Assembler::below, L_copy_4_bytes); // use unsigned cmp | |
405 | 971 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) { |
0 | 972 // align source address at 4 bytes address boundary |
973 if (t == T_BYTE) { | |
974 // One byte misalignment happens only for byte arrays | |
975 __ testl(from, 1); | |
976 __ jccb(Assembler::zero, L_skip_align1); | |
977 __ movb(rax, Address(from, 0)); | |
978 __ movb(Address(from, to_from, Address::times_1, 0), rax); | |
979 __ increment(from); | |
980 __ decrement(count); | |
981 __ BIND(L_skip_align1); | |
982 } | |
983 // Two bytes misalignment happens only for byte and short (char) arrays | |
984 __ testl(from, 2); | |
985 __ jccb(Assembler::zero, L_skip_align2); | |
986 __ movw(rax, Address(from, 0)); | |
987 __ movw(Address(from, to_from, Address::times_1, 0), rax); | |
304 | 988 __ addptr(from, 2); |
0 | 989 __ subl(count, 1<<(shift-1)); |
990 __ BIND(L_skip_align2); | |
991 } | |
992 if (!VM_Version::supports_mmx()) { | |
304 | 993 __ mov(rax, count); // save 'count' |
994 __ shrl(count, shift); // bytes count | |
995 __ addptr(to_from, from);// restore 'to' | |
996 __ rep_mov(); | |
997 __ subptr(to_from, from);// restore 'to_from' | |
998 __ mov(count, rax); // restore 'count' | |
0 | 999 __ jmpb(L_copy_2_bytes); // all dwords were copied |
1000 } else { | |
405 | 1001 if (!UseUnalignedLoadStores) { |
1002 // align to 8 bytes, we know we are 4 byte aligned to start | |
1003 __ testptr(from, 4); | |
1004 __ jccb(Assembler::zero, L_copy_64_bytes); | |
1005 __ movl(rax, Address(from, 0)); | |
1006 __ movl(Address(from, to_from, Address::times_1, 0), rax); | |
1007 __ addptr(from, 4); | |
1008 __ subl(count, 1<<shift); | |
1009 } | |
0 | 1010 __ BIND(L_copy_64_bytes); |
304 | 1011 __ mov(rax, count); |
0 | 1012 __ shrl(rax, shift+1); // 8 bytes chunk count |
1013 // | |
1014 // Copy 8-byte chunks through MMX registers, 8 per iteration of the loop | |
1015 // | |
405 | 1016 if (UseXMMForArrayCopy) { |
1017 xmm_copy_forward(from, to_from, rax); | |
1018 } else { | |
1019 mmx_copy_forward(from, to_from, rax); | |
1020 } | |
0 | 1021 } |
1022 // copy tailing dword | |
1023 __ BIND(L_copy_4_bytes); | |
1024 __ testl(count, 1<<shift); | |
1025 __ jccb(Assembler::zero, L_copy_2_bytes); | |
1026 __ movl(rax, Address(from, 0)); | |
1027 __ movl(Address(from, to_from, Address::times_1, 0), rax); | |
1028 if (t == T_BYTE || t == T_SHORT) { | |
304 | 1029 __ addptr(from, 4); |
0 | 1030 __ BIND(L_copy_2_bytes); |
1031 // copy tailing word | |
1032 __ testl(count, 1<<(shift-1)); | |
1033 __ jccb(Assembler::zero, L_copy_byte); | |
1034 __ movw(rax, Address(from, 0)); | |
1035 __ movw(Address(from, to_from, Address::times_1, 0), rax); | |
1036 if (t == T_BYTE) { | |
304 | 1037 __ addptr(from, 2); |
0 | 1038 __ BIND(L_copy_byte); |
1039 // copy tailing byte | |
1040 __ testl(count, 1); | |
1041 __ jccb(Assembler::zero, L_exit); | |
1042 __ movb(rax, Address(from, 0)); | |
1043 __ movb(Address(from, to_from, Address::times_1, 0), rax); | |
1044 __ BIND(L_exit); | |
1045 } else { | |
1046 __ BIND(L_copy_byte); | |
1047 } | |
1048 } else { | |
1049 __ BIND(L_copy_2_bytes); | |
1050 } | |
1051 | |
1052 if (t == T_OBJECT) { | |
1053 __ movl(count, Address(rsp, 12+12)); // reread 'count' | |
304 | 1054 __ mov(to, saved_to); // restore 'to' |
0 | 1055 gen_write_ref_array_post_barrier(to, count); |
1056 __ BIND(L_0_count); | |
1057 } | |
1058 inc_copy_counter_np(t); | |
304 | 1059 __ pop(rdi); |
1060 __ pop(rsi); | |
0 | 1061 __ leave(); // required for proper stackwalking of RuntimeStub frame |
304 | 1062 __ xorptr(rax, rax); // return 0 |
0 | 1063 __ ret(0); |
1064 return start; | |
1065 } | |
1066 | |
1067 | |
1763 | 1068 address generate_fill(BasicType t, bool aligned, const char *name) { |
1069 __ align(CodeEntryAlignment); | |
1070 StubCodeMark mark(this, "StubRoutines", name); | |
1071 address start = __ pc(); | |
1072 | |
1073 BLOCK_COMMENT("Entry:"); | |
1074 | |
1075 const Register to = rdi; // source array address | |
1076 const Register value = rdx; // value | |
1077 const Register count = rsi; // elements count | |
1078 | |
1079 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
1080 __ push(rsi); | |
1081 __ push(rdi); | |
1082 __ movptr(to , Address(rsp, 12+ 4)); | |
1083 __ movl(value, Address(rsp, 12+ 8)); | |
1084 __ movl(count, Address(rsp, 12+ 12)); | |
1085 | |
1086 __ generate_fill(t, aligned, to, value, count, rax, xmm0); | |
1087 | |
1088 __ pop(rdi); | |
1089 __ pop(rsi); | |
1090 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
1091 __ ret(0); | |
1092 return start; | |
1093 } | |
1094 | |
0 | 1095 address generate_conjoint_copy(BasicType t, bool aligned, |
1096 Address::ScaleFactor sf, | |
1097 address nooverlap_target, | |
1098 address* entry, const char *name) { | |
1099 __ align(CodeEntryAlignment); | |
1100 StubCodeMark mark(this, "StubRoutines", name); | |
1101 address start = __ pc(); | |
1102 | |
1103 Label L_0_count, L_exit, L_skip_align1, L_skip_align2, L_copy_byte; | |
1104 Label L_copy_2_bytes, L_copy_4_bytes, L_copy_8_bytes, L_copy_8_bytes_loop; | |
1105 | |
304 | 1106 int shift = Address::times_ptr - sf; |
0 | 1107 |
1108 const Register src = rax; // source array address | |
1109 const Register dst = rdx; // destination array address | |
1110 const Register from = rsi; // source array address | |
1111 const Register to = rdi; // destination array address | |
1112 const Register count = rcx; // elements count | |
1113 const Register end = rax; // array end address | |
1114 | |
1115 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1116 __ push(rsi); |
1117 __ push(rdi); | |
1118 __ movptr(src , Address(rsp, 12+ 4)); // from | |
1119 __ movptr(dst , Address(rsp, 12+ 8)); // to | |
1120 __ movl2ptr(count, Address(rsp, 12+12)); // count | |
0 | 1121 if (t == T_OBJECT) { |
1122 gen_write_ref_array_pre_barrier(dst, count); | |
1123 } | |
1124 | |
1125 if (entry != NULL) { | |
1126 *entry = __ pc(); // Entry point from generic arraycopy stub. | |
1127 BLOCK_COMMENT("Entry:"); | |
1128 } | |
1129 | |
1130 if (t == T_OBJECT) { | |
1131 __ testl(count, count); | |
1132 __ jcc(Assembler::zero, L_0_count); | |
1133 } | |
304 | 1134 __ mov(from, src); |
1135 __ mov(to , dst); | |
0 | 1136 |
1137 // arrays overlap test | |
1138 RuntimeAddress nooverlap(nooverlap_target); | |
304 | 1139 __ cmpptr(dst, src); |
1140 __ lea(end, Address(src, count, sf, 0)); // src + count * elem_size | |
0 | 1141 __ jump_cc(Assembler::belowEqual, nooverlap); |
304 | 1142 __ cmpptr(dst, end); |
0 | 1143 __ jump_cc(Assembler::aboveEqual, nooverlap); |
1144 | |
1145 // copy from high to low | |
1146 __ cmpl(count, 2<<shift); // Short arrays (< 8 bytes) copy by element | |
1147 __ jcc(Assembler::below, L_copy_4_bytes); // use unsigned cmp | |
1148 if (t == T_BYTE || t == T_SHORT) { | |
1149 // Align the end of destination array at 4 bytes address boundary | |
304 | 1150 __ lea(end, Address(dst, count, sf, 0)); |
0 | 1151 if (t == T_BYTE) { |
1152 // One byte misalignment happens only for byte arrays | |
1153 __ testl(end, 1); | |
1154 __ jccb(Assembler::zero, L_skip_align1); | |
1155 __ decrement(count); | |
1156 __ movb(rdx, Address(from, count, sf, 0)); | |
1157 __ movb(Address(to, count, sf, 0), rdx); | |
1158 __ BIND(L_skip_align1); | |
1159 } | |
1160 // Two bytes misalignment happens only for byte and short (char) arrays | |
1161 __ testl(end, 2); | |
1162 __ jccb(Assembler::zero, L_skip_align2); | |
304 | 1163 __ subptr(count, 1<<(shift-1)); |
0 | 1164 __ movw(rdx, Address(from, count, sf, 0)); |
1165 __ movw(Address(to, count, sf, 0), rdx); | |
1166 __ BIND(L_skip_align2); | |
1167 __ cmpl(count, 2<<shift); // Short arrays (< 8 bytes) copy by element | |
1168 __ jcc(Assembler::below, L_copy_4_bytes); | |
1169 } | |
1170 | |
1171 if (!VM_Version::supports_mmx()) { | |
1172 __ std(); | |
304 | 1173 __ mov(rax, count); // Save 'count' |
1174 __ mov(rdx, to); // Save 'to' | |
1175 __ lea(rsi, Address(from, count, sf, -4)); | |
1176 __ lea(rdi, Address(to , count, sf, -4)); | |
1177 __ shrptr(count, shift); // bytes count | |
1178 __ rep_mov(); | |
0 | 1179 __ cld(); |
304 | 1180 __ mov(count, rax); // restore 'count' |
0 | 1181 __ andl(count, (1<<shift)-1); // mask the number of rest elements |
304 | 1182 __ movptr(from, Address(rsp, 12+4)); // reread 'from' |
1183 __ mov(to, rdx); // restore 'to' | |
0 | 1184 __ jmpb(L_copy_2_bytes); // all dword were copied |
1185 } else { | |
1186 // Align to 8 bytes the end of array. It is aligned to 4 bytes already. | |
304 | 1187 __ testptr(end, 4); |
0 | 1188 __ jccb(Assembler::zero, L_copy_8_bytes); |
1189 __ subl(count, 1<<shift); | |
1190 __ movl(rdx, Address(from, count, sf, 0)); | |
1191 __ movl(Address(to, count, sf, 0), rdx); | |
1192 __ jmpb(L_copy_8_bytes); | |
1193 | |
1365 | 1194 __ align(OptoLoopAlignment); |
0 | 1195 // Move 8 bytes |
1196 __ BIND(L_copy_8_bytes_loop); | |
405 | 1197 if (UseXMMForArrayCopy) { |
1198 __ movq(xmm0, Address(from, count, sf, 0)); | |
1199 __ movq(Address(to, count, sf, 0), xmm0); | |
1200 } else { | |
1201 __ movq(mmx0, Address(from, count, sf, 0)); | |
1202 __ movq(Address(to, count, sf, 0), mmx0); | |
1203 } | |
0 | 1204 __ BIND(L_copy_8_bytes); |
1205 __ subl(count, 2<<shift); | |
1206 __ jcc(Assembler::greaterEqual, L_copy_8_bytes_loop); | |
1207 __ addl(count, 2<<shift); | |
405 | 1208 if (!UseXMMForArrayCopy) { |
1209 __ emms(); | |
1210 } | |
0 | 1211 } |
1212 __ BIND(L_copy_4_bytes); | |
1213 // copy prefix qword | |
1214 __ testl(count, 1<<shift); | |
1215 __ jccb(Assembler::zero, L_copy_2_bytes); | |
1216 __ movl(rdx, Address(from, count, sf, -4)); | |
1217 __ movl(Address(to, count, sf, -4), rdx); | |
1218 | |
1219 if (t == T_BYTE || t == T_SHORT) { | |
1220 __ subl(count, (1<<shift)); | |
1221 __ BIND(L_copy_2_bytes); | |
1222 // copy prefix dword | |
1223 __ testl(count, 1<<(shift-1)); | |
1224 __ jccb(Assembler::zero, L_copy_byte); | |
1225 __ movw(rdx, Address(from, count, sf, -2)); | |
1226 __ movw(Address(to, count, sf, -2), rdx); | |
1227 if (t == T_BYTE) { | |
1228 __ subl(count, 1<<(shift-1)); | |
1229 __ BIND(L_copy_byte); | |
1230 // copy prefix byte | |
1231 __ testl(count, 1); | |
1232 __ jccb(Assembler::zero, L_exit); | |
1233 __ movb(rdx, Address(from, 0)); | |
1234 __ movb(Address(to, 0), rdx); | |
1235 __ BIND(L_exit); | |
1236 } else { | |
1237 __ BIND(L_copy_byte); | |
1238 } | |
1239 } else { | |
1240 __ BIND(L_copy_2_bytes); | |
1241 } | |
1242 if (t == T_OBJECT) { | |
304 | 1243 __ movl2ptr(count, Address(rsp, 12+12)); // reread count |
0 | 1244 gen_write_ref_array_post_barrier(to, count); |
1245 __ BIND(L_0_count); | |
1246 } | |
1247 inc_copy_counter_np(t); | |
304 | 1248 __ pop(rdi); |
1249 __ pop(rsi); | |
0 | 1250 __ leave(); // required for proper stackwalking of RuntimeStub frame |
304 | 1251 __ xorptr(rax, rax); // return 0 |
0 | 1252 __ ret(0); |
1253 return start; | |
1254 } | |
1255 | |
1256 | |
1257 address generate_disjoint_long_copy(address* entry, const char *name) { | |
1258 __ align(CodeEntryAlignment); | |
1259 StubCodeMark mark(this, "StubRoutines", name); | |
1260 address start = __ pc(); | |
1261 | |
1262 Label L_copy_8_bytes, L_copy_8_bytes_loop; | |
1263 const Register from = rax; // source array address | |
1264 const Register to = rdx; // destination array address | |
1265 const Register count = rcx; // elements count | |
1266 const Register to_from = rdx; // (to - from) | |
1267 | |
1268 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1269 __ movptr(from , Address(rsp, 8+0)); // from |
1270 __ movptr(to , Address(rsp, 8+4)); // to | |
1271 __ movl2ptr(count, Address(rsp, 8+8)); // count | |
0 | 1272 |
1273 *entry = __ pc(); // Entry point from conjoint arraycopy stub. | |
1274 BLOCK_COMMENT("Entry:"); | |
1275 | |
304 | 1276 __ subptr(to, from); // to --> to_from |
0 | 1277 if (VM_Version::supports_mmx()) { |
405 | 1278 if (UseXMMForArrayCopy) { |
1279 xmm_copy_forward(from, to_from, count); | |
1280 } else { | |
1281 mmx_copy_forward(from, to_from, count); | |
1282 } | |
0 | 1283 } else { |
1284 __ jmpb(L_copy_8_bytes); | |
1365 | 1285 __ align(OptoLoopAlignment); |
0 | 1286 __ BIND(L_copy_8_bytes_loop); |
1287 __ fild_d(Address(from, 0)); | |
1288 __ fistp_d(Address(from, to_from, Address::times_1)); | |
304 | 1289 __ addptr(from, 8); |
0 | 1290 __ BIND(L_copy_8_bytes); |
1291 __ decrement(count); | |
1292 __ jcc(Assembler::greaterEqual, L_copy_8_bytes_loop); | |
1293 } | |
1294 inc_copy_counter_np(T_LONG); | |
1295 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1296 __ xorptr(rax, rax); // return 0 |
0 | 1297 __ ret(0); |
1298 return start; | |
1299 } | |
1300 | |
1301 address generate_conjoint_long_copy(address nooverlap_target, | |
1302 address* entry, const char *name) { | |
1303 __ align(CodeEntryAlignment); | |
1304 StubCodeMark mark(this, "StubRoutines", name); | |
1305 address start = __ pc(); | |
1306 | |
1307 Label L_copy_8_bytes, L_copy_8_bytes_loop; | |
1308 const Register from = rax; // source array address | |
1309 const Register to = rdx; // destination array address | |
1310 const Register count = rcx; // elements count | |
1311 const Register end_from = rax; // source array end address | |
1312 | |
1313 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1314 __ movptr(from , Address(rsp, 8+0)); // from |
1315 __ movptr(to , Address(rsp, 8+4)); // to | |
1316 __ movl2ptr(count, Address(rsp, 8+8)); // count | |
0 | 1317 |
1318 *entry = __ pc(); // Entry point from generic arraycopy stub. | |
1319 BLOCK_COMMENT("Entry:"); | |
1320 | |
1321 // arrays overlap test | |
304 | 1322 __ cmpptr(to, from); |
0 | 1323 RuntimeAddress nooverlap(nooverlap_target); |
1324 __ jump_cc(Assembler::belowEqual, nooverlap); | |
304 | 1325 __ lea(end_from, Address(from, count, Address::times_8, 0)); |
1326 __ cmpptr(to, end_from); | |
1327 __ movptr(from, Address(rsp, 8)); // from | |
0 | 1328 __ jump_cc(Assembler::aboveEqual, nooverlap); |
1329 | |
1330 __ jmpb(L_copy_8_bytes); | |
1331 | |
1365 | 1332 __ align(OptoLoopAlignment); |
0 | 1333 __ BIND(L_copy_8_bytes_loop); |
1334 if (VM_Version::supports_mmx()) { | |
405 | 1335 if (UseXMMForArrayCopy) { |
1336 __ movq(xmm0, Address(from, count, Address::times_8)); | |
1337 __ movq(Address(to, count, Address::times_8), xmm0); | |
1338 } else { | |
1339 __ movq(mmx0, Address(from, count, Address::times_8)); | |
1340 __ movq(Address(to, count, Address::times_8), mmx0); | |
1341 } | |
0 | 1342 } else { |
1343 __ fild_d(Address(from, count, Address::times_8)); | |
1344 __ fistp_d(Address(to, count, Address::times_8)); | |
1345 } | |
1346 __ BIND(L_copy_8_bytes); | |
1347 __ decrement(count); | |
1348 __ jcc(Assembler::greaterEqual, L_copy_8_bytes_loop); | |
1349 | |
405 | 1350 if (VM_Version::supports_mmx() && !UseXMMForArrayCopy) { |
0 | 1351 __ emms(); |
1352 } | |
1353 inc_copy_counter_np(T_LONG); | |
1354 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1355 __ xorptr(rax, rax); // return 0 |
0 | 1356 __ ret(0); |
1357 return start; | |
1358 } | |
1359 | |
1360 | |
1361 // Helper for generating a dynamic type check. | |
1362 // The sub_klass must be one of {rbx, rdx, rsi}. | |
1363 // The temp is killed. | |
1364 void generate_type_check(Register sub_klass, | |
1365 Address& super_check_offset_addr, | |
1366 Address& super_klass_addr, | |
1367 Register temp, | |
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1368 Label* L_success, Label* L_failure) { |
0 | 1369 BLOCK_COMMENT("type_check:"); |
1370 | |
1371 Label L_fallthrough; | |
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1372 #define LOCAL_JCC(assembler_con, label_ptr) \ |
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1373 if (label_ptr != NULL) __ jcc(assembler_con, *(label_ptr)); \ |
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1374 else __ jcc(assembler_con, L_fallthrough) /*omit semi*/ |
0 | 1375 |
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1376 // The following is a strange variation of the fast path which requires |
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1377 // one less register, because needed values are on the argument stack. |
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1378 // __ check_klass_subtype_fast_path(sub_klass, *super_klass*, temp, |
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1379 // L_success, L_failure, NULL); |
0 | 1380 assert_different_registers(sub_klass, temp); |
1381 | |
1382 int sc_offset = (klassOopDesc::header_size() * HeapWordSize + | |
1383 Klass::secondary_super_cache_offset_in_bytes()); | |
1384 | |
1385 // if the pointers are equal, we are done (e.g., String[] elements) | |
304 | 1386 __ cmpptr(sub_klass, super_klass_addr); |
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1387 LOCAL_JCC(Assembler::equal, L_success); |
0 | 1388 |
1389 // check the supertype display: | |
304 | 1390 __ movl2ptr(temp, super_check_offset_addr); |
0 | 1391 Address super_check_addr(sub_klass, temp, Address::times_1, 0); |
304 | 1392 __ movptr(temp, super_check_addr); // load displayed supertype |
1393 __ cmpptr(temp, super_klass_addr); // test the super type | |
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1394 LOCAL_JCC(Assembler::equal, L_success); |
0 | 1395 |
1396 // if it was a primary super, we can just fail immediately | |
1397 __ cmpl(super_check_offset_addr, sc_offset); | |
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1398 LOCAL_JCC(Assembler::notEqual, L_failure); |
0 | 1399 |
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1400 // The repne_scan instruction uses fixed registers, which will get spilled. |
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1401 // We happen to know this works best when super_klass is in rax. |
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1402 Register super_klass = temp; |
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1403 __ movptr(super_klass, super_klass_addr); |
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1404 __ check_klass_subtype_slow_path(sub_klass, super_klass, noreg, noreg, |
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1405 L_success, L_failure); |
0 | 1406 |
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1407 __ bind(L_fallthrough); |
0 | 1408 |
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1409 if (L_success == NULL) { BLOCK_COMMENT("L_success:"); } |
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1410 if (L_failure == NULL) { BLOCK_COMMENT("L_failure:"); } |
0 | 1411 |
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1412 #undef LOCAL_JCC |
0 | 1413 } |
1414 | |
1415 // | |
1416 // Generate checkcasting array copy stub | |
1417 // | |
1418 // Input: | |
1419 // 4(rsp) - source array address | |
1420 // 8(rsp) - destination array address | |
1421 // 12(rsp) - element count, can be zero | |
1422 // 16(rsp) - size_t ckoff (super_check_offset) | |
1423 // 20(rsp) - oop ckval (super_klass) | |
1424 // | |
1425 // Output: | |
1426 // rax, == 0 - success | |
1427 // rax, == -1^K - failure, where K is partial transfer count | |
1428 // | |
1429 address generate_checkcast_copy(const char *name, address* entry) { | |
1430 __ align(CodeEntryAlignment); | |
1431 StubCodeMark mark(this, "StubRoutines", name); | |
1432 address start = __ pc(); | |
1433 | |
1434 Label L_load_element, L_store_element, L_do_card_marks, L_done; | |
1435 | |
1436 // register use: | |
1437 // rax, rdx, rcx -- loop control (end_from, end_to, count) | |
1438 // rdi, rsi -- element access (oop, klass) | |
1439 // rbx, -- temp | |
1440 const Register from = rax; // source array address | |
1441 const Register to = rdx; // destination array address | |
1442 const Register length = rcx; // elements count | |
1443 const Register elem = rdi; // each oop copied | |
1444 const Register elem_klass = rsi; // each elem._klass (sub_klass) | |
1445 const Register temp = rbx; // lone remaining temp | |
1446 | |
1447 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
1448 | |
304 | 1449 __ push(rsi); |
1450 __ push(rdi); | |
1451 __ push(rbx); | |
0 | 1452 |
1453 Address from_arg(rsp, 16+ 4); // from | |
1454 Address to_arg(rsp, 16+ 8); // to | |
1455 Address length_arg(rsp, 16+12); // elements count | |
1456 Address ckoff_arg(rsp, 16+16); // super_check_offset | |
1457 Address ckval_arg(rsp, 16+20); // super_klass | |
1458 | |
1459 // Load up: | |
304 | 1460 __ movptr(from, from_arg); |
1461 __ movptr(to, to_arg); | |
1462 __ movl2ptr(length, length_arg); | |
0 | 1463 |
1464 *entry = __ pc(); // Entry point from generic arraycopy stub. | |
1465 BLOCK_COMMENT("Entry:"); | |
1466 | |
1467 //--------------------------------------------------------------- | |
1468 // Assembler stub will be used for this call to arraycopy | |
1469 // if the two arrays are subtypes of Object[] but the | |
1470 // destination array type is not equal to or a supertype | |
1471 // of the source type. Each element must be separately | |
1472 // checked. | |
1473 | |
1474 // Loop-invariant addresses. They are exclusive end pointers. | |
304 | 1475 Address end_from_addr(from, length, Address::times_ptr, 0); |
1476 Address end_to_addr(to, length, Address::times_ptr, 0); | |
0 | 1477 |
1478 Register end_from = from; // re-use | |
1479 Register end_to = to; // re-use | |
1480 Register count = length; // re-use | |
1481 | |
1482 // Loop-variant addresses. They assume post-incremented count < 0. | |
304 | 1483 Address from_element_addr(end_from, count, Address::times_ptr, 0); |
1484 Address to_element_addr(end_to, count, Address::times_ptr, 0); | |
0 | 1485 Address elem_klass_addr(elem, oopDesc::klass_offset_in_bytes()); |
1486 | |
1487 // Copy from low to high addresses, indexed from the end of each array. | |
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1488 gen_write_ref_array_pre_barrier(to, count); |
304 | 1489 __ lea(end_from, end_from_addr); |
1490 __ lea(end_to, end_to_addr); | |
0 | 1491 assert(length == count, ""); // else fix next line: |
304 | 1492 __ negptr(count); // negate and test the length |
0 | 1493 __ jccb(Assembler::notZero, L_load_element); |
1494 | |
1495 // Empty array: Nothing to do. | |
304 | 1496 __ xorptr(rax, rax); // return 0 on (trivial) success |
0 | 1497 __ jmp(L_done); |
1498 | |
1499 // ======== begin loop ======== | |
1500 // (Loop is rotated; its entry is L_load_element.) | |
1501 // Loop control: | |
1502 // for (count = -count; count != 0; count++) | |
1503 // Base pointers src, dst are biased by 8*count,to last element. | |
1365 | 1504 __ align(OptoLoopAlignment); |
0 | 1505 |
1506 __ BIND(L_store_element); | |
304 | 1507 __ movptr(to_element_addr, elem); // store the oop |
0 | 1508 __ increment(count); // increment the count toward zero |
1509 __ jccb(Assembler::zero, L_do_card_marks); | |
1510 | |
1511 // ======== loop entry is here ======== | |
1512 __ BIND(L_load_element); | |
304 | 1513 __ movptr(elem, from_element_addr); // load the oop |
1514 __ testptr(elem, elem); | |
0 | 1515 __ jccb(Assembler::zero, L_store_element); |
1516 | |
1517 // (Could do a trick here: Remember last successful non-null | |
1518 // element stored and make a quick oop equality check on it.) | |
1519 | |
304 | 1520 __ movptr(elem_klass, elem_klass_addr); // query the object klass |
0 | 1521 generate_type_check(elem_klass, ckoff_arg, ckval_arg, temp, |
1522 &L_store_element, NULL); | |
1523 // (On fall-through, we have failed the element type check.) | |
1524 // ======== end loop ======== | |
1525 | |
1526 // It was a real error; we must depend on the caller to finish the job. | |
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1527 // Register "count" = -1 * number of *remaining* oops, length_arg = *total* oops. |
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1528 // Emit GC store barriers for the oops we have copied (length_arg + count), |
0 | 1529 // and report their number to the caller. |
1530 __ addl(count, length_arg); // transfers = (length - remaining) | |
304 | 1531 __ movl2ptr(rax, count); // save the value |
1532 __ notptr(rax); // report (-1^K) to caller | |
1533 __ movptr(to, to_arg); // reload | |
0 | 1534 assert_different_registers(to, count, rax); |
1535 gen_write_ref_array_post_barrier(to, count); | |
1536 __ jmpb(L_done); | |
1537 | |
1538 // Come here on success only. | |
1539 __ BIND(L_do_card_marks); | |
304 | 1540 __ movl2ptr(count, length_arg); |
1541 __ movptr(to, to_arg); // reload | |
0 | 1542 gen_write_ref_array_post_barrier(to, count); |
304 | 1543 __ xorptr(rax, rax); // return 0 on success |
0 | 1544 |
1545 // Common exit point (success or failure). | |
1546 __ BIND(L_done); | |
304 | 1547 __ pop(rbx); |
1548 __ pop(rdi); | |
1549 __ pop(rsi); | |
0 | 1550 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr); |
1551 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
1552 __ ret(0); | |
1553 | |
1554 return start; | |
1555 } | |
1556 | |
1557 // | |
1558 // Generate 'unsafe' array copy stub | |
1559 // Though just as safe as the other stubs, it takes an unscaled | |
1560 // size_t argument instead of an element count. | |
1561 // | |
1562 // Input: | |
1563 // 4(rsp) - source array address | |
1564 // 8(rsp) - destination array address | |
1565 // 12(rsp) - byte count, can be zero | |
1566 // | |
1567 // Output: | |
1568 // rax, == 0 - success | |
1569 // rax, == -1 - need to call System.arraycopy | |
1570 // | |
1571 // Examines the alignment of the operands and dispatches | |
1572 // to a long, int, short, or byte copy loop. | |
1573 // | |
1574 address generate_unsafe_copy(const char *name, | |
1575 address byte_copy_entry, | |
1576 address short_copy_entry, | |
1577 address int_copy_entry, | |
1578 address long_copy_entry) { | |
1579 | |
1580 Label L_long_aligned, L_int_aligned, L_short_aligned; | |
1581 | |
1582 __ align(CodeEntryAlignment); | |
1583 StubCodeMark mark(this, "StubRoutines", name); | |
1584 address start = __ pc(); | |
1585 | |
1586 const Register from = rax; // source array address | |
1587 const Register to = rdx; // destination array address | |
1588 const Register count = rcx; // elements count | |
1589 | |
1590 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1591 __ push(rsi); |
1592 __ push(rdi); | |
0 | 1593 Address from_arg(rsp, 12+ 4); // from |
1594 Address to_arg(rsp, 12+ 8); // to | |
1595 Address count_arg(rsp, 12+12); // byte count | |
1596 | |
1597 // Load up: | |
304 | 1598 __ movptr(from , from_arg); |
1599 __ movptr(to , to_arg); | |
1600 __ movl2ptr(count, count_arg); | |
0 | 1601 |
1602 // bump this on entry, not on exit: | |
1603 inc_counter_np(SharedRuntime::_unsafe_array_copy_ctr); | |
1604 | |
1605 const Register bits = rsi; | |
304 | 1606 __ mov(bits, from); |
1607 __ orptr(bits, to); | |
1608 __ orptr(bits, count); | |
0 | 1609 |
1610 __ testl(bits, BytesPerLong-1); | |
1611 __ jccb(Assembler::zero, L_long_aligned); | |
1612 | |
1613 __ testl(bits, BytesPerInt-1); | |
1614 __ jccb(Assembler::zero, L_int_aligned); | |
1615 | |
1616 __ testl(bits, BytesPerShort-1); | |
1617 __ jump_cc(Assembler::notZero, RuntimeAddress(byte_copy_entry)); | |
1618 | |
1619 __ BIND(L_short_aligned); | |
304 | 1620 __ shrptr(count, LogBytesPerShort); // size => short_count |
0 | 1621 __ movl(count_arg, count); // update 'count' |
1622 __ jump(RuntimeAddress(short_copy_entry)); | |
1623 | |
1624 __ BIND(L_int_aligned); | |
304 | 1625 __ shrptr(count, LogBytesPerInt); // size => int_count |
0 | 1626 __ movl(count_arg, count); // update 'count' |
1627 __ jump(RuntimeAddress(int_copy_entry)); | |
1628 | |
1629 __ BIND(L_long_aligned); | |
304 | 1630 __ shrptr(count, LogBytesPerLong); // size => qword_count |
0 | 1631 __ movl(count_arg, count); // update 'count' |
304 | 1632 __ pop(rdi); // Do pops here since jlong_arraycopy stub does not do it. |
1633 __ pop(rsi); | |
0 | 1634 __ jump(RuntimeAddress(long_copy_entry)); |
1635 | |
1636 return start; | |
1637 } | |
1638 | |
1639 | |
1640 // Perform range checks on the proposed arraycopy. | |
1641 // Smashes src_pos and dst_pos. (Uses them up for temps.) | |
1642 void arraycopy_range_checks(Register src, | |
1643 Register src_pos, | |
1644 Register dst, | |
1645 Register dst_pos, | |
1646 Address& length, | |
1647 Label& L_failed) { | |
1648 BLOCK_COMMENT("arraycopy_range_checks:"); | |
1649 const Register src_end = src_pos; // source array end position | |
1650 const Register dst_end = dst_pos; // destination array end position | |
1651 __ addl(src_end, length); // src_pos + length | |
1652 __ addl(dst_end, length); // dst_pos + length | |
1653 | |
1654 // if (src_pos + length > arrayOop(src)->length() ) FAIL; | |
1655 __ cmpl(src_end, Address(src, arrayOopDesc::length_offset_in_bytes())); | |
1656 __ jcc(Assembler::above, L_failed); | |
1657 | |
1658 // if (dst_pos + length > arrayOop(dst)->length() ) FAIL; | |
1659 __ cmpl(dst_end, Address(dst, arrayOopDesc::length_offset_in_bytes())); | |
1660 __ jcc(Assembler::above, L_failed); | |
1661 | |
1662 BLOCK_COMMENT("arraycopy_range_checks done"); | |
1663 } | |
1664 | |
1665 | |
1666 // | |
1667 // Generate generic array copy stubs | |
1668 // | |
1669 // Input: | |
1670 // 4(rsp) - src oop | |
1671 // 8(rsp) - src_pos | |
1672 // 12(rsp) - dst oop | |
1673 // 16(rsp) - dst_pos | |
1674 // 20(rsp) - element count | |
1675 // | |
1676 // Output: | |
1677 // rax, == 0 - success | |
1678 // rax, == -1^K - failure, where K is partial transfer count | |
1679 // | |
1680 address generate_generic_copy(const char *name, | |
1681 address entry_jbyte_arraycopy, | |
1682 address entry_jshort_arraycopy, | |
1683 address entry_jint_arraycopy, | |
1684 address entry_oop_arraycopy, | |
1685 address entry_jlong_arraycopy, | |
1686 address entry_checkcast_arraycopy) { | |
1687 Label L_failed, L_failed_0, L_objArray; | |
1688 | |
1689 { int modulus = CodeEntryAlignment; | |
1690 int target = modulus - 5; // 5 = sizeof jmp(L_failed) | |
1691 int advance = target - (__ offset() % modulus); | |
1692 if (advance < 0) advance += modulus; | |
1693 if (advance > 0) __ nop(advance); | |
1694 } | |
1695 StubCodeMark mark(this, "StubRoutines", name); | |
1696 | |
1697 // Short-hop target to L_failed. Makes for denser prologue code. | |
1698 __ BIND(L_failed_0); | |
1699 __ jmp(L_failed); | |
1700 assert(__ offset() % CodeEntryAlignment == 0, "no further alignment needed"); | |
1701 | |
1702 __ align(CodeEntryAlignment); | |
1703 address start = __ pc(); | |
1704 | |
1705 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1706 __ push(rsi); |
1707 __ push(rdi); | |
0 | 1708 |
1709 // bump this on entry, not on exit: | |
1710 inc_counter_np(SharedRuntime::_generic_array_copy_ctr); | |
1711 | |
1712 // Input values | |
1713 Address SRC (rsp, 12+ 4); | |
1714 Address SRC_POS (rsp, 12+ 8); | |
1715 Address DST (rsp, 12+12); | |
1716 Address DST_POS (rsp, 12+16); | |
1717 Address LENGTH (rsp, 12+20); | |
1718 | |
1719 //----------------------------------------------------------------------- | |
1720 // Assembler stub will be used for this call to arraycopy | |
1721 // if the following conditions are met: | |
1722 // | |
1723 // (1) src and dst must not be null. | |
1724 // (2) src_pos must not be negative. | |
1725 // (3) dst_pos must not be negative. | |
1726 // (4) length must not be negative. | |
1727 // (5) src klass and dst klass should be the same and not NULL. | |
1728 // (6) src and dst should be arrays. | |
1729 // (7) src_pos + length must not exceed length of src. | |
1730 // (8) dst_pos + length must not exceed length of dst. | |
1731 // | |
1732 | |
1733 const Register src = rax; // source array oop | |
1734 const Register src_pos = rsi; | |
1735 const Register dst = rdx; // destination array oop | |
1736 const Register dst_pos = rdi; | |
1737 const Register length = rcx; // transfer count | |
1738 | |
1739 // if (src == NULL) return -1; | |
304 | 1740 __ movptr(src, SRC); // src oop |
1741 __ testptr(src, src); | |
0 | 1742 __ jccb(Assembler::zero, L_failed_0); |
1743 | |
1744 // if (src_pos < 0) return -1; | |
304 | 1745 __ movl2ptr(src_pos, SRC_POS); // src_pos |
0 | 1746 __ testl(src_pos, src_pos); |
1747 __ jccb(Assembler::negative, L_failed_0); | |
1748 | |
1749 // if (dst == NULL) return -1; | |
304 | 1750 __ movptr(dst, DST); // dst oop |
1751 __ testptr(dst, dst); | |
0 | 1752 __ jccb(Assembler::zero, L_failed_0); |
1753 | |
1754 // if (dst_pos < 0) return -1; | |
304 | 1755 __ movl2ptr(dst_pos, DST_POS); // dst_pos |
0 | 1756 __ testl(dst_pos, dst_pos); |
1757 __ jccb(Assembler::negative, L_failed_0); | |
1758 | |
1759 // if (length < 0) return -1; | |
304 | 1760 __ movl2ptr(length, LENGTH); // length |
0 | 1761 __ testl(length, length); |
1762 __ jccb(Assembler::negative, L_failed_0); | |
1763 | |
1764 // if (src->klass() == NULL) return -1; | |
1765 Address src_klass_addr(src, oopDesc::klass_offset_in_bytes()); | |
1766 Address dst_klass_addr(dst, oopDesc::klass_offset_in_bytes()); | |
1767 const Register rcx_src_klass = rcx; // array klass | |
304 | 1768 __ movptr(rcx_src_klass, Address(src, oopDesc::klass_offset_in_bytes())); |
0 | 1769 |
1770 #ifdef ASSERT | |
1771 // assert(src->klass() != NULL); | |
1772 BLOCK_COMMENT("assert klasses not null"); | |
1773 { Label L1, L2; | |
304 | 1774 __ testptr(rcx_src_klass, rcx_src_klass); |
0 | 1775 __ jccb(Assembler::notZero, L2); // it is broken if klass is NULL |
1776 __ bind(L1); | |
1777 __ stop("broken null klass"); | |
1778 __ bind(L2); | |
304 | 1779 __ cmpptr(dst_klass_addr, (int32_t)NULL_WORD); |
0 | 1780 __ jccb(Assembler::equal, L1); // this would be broken also |
1781 BLOCK_COMMENT("assert done"); | |
1782 } | |
1783 #endif //ASSERT | |
1784 | |
1785 // Load layout helper (32-bits) | |
1786 // | |
1787 // |array_tag| | header_size | element_type | |log2_element_size| | |
1788 // 32 30 24 16 8 2 0 | |
1789 // | |
1790 // array_tag: typeArray = 0x3, objArray = 0x2, non-array = 0x0 | |
1791 // | |
1792 | |
1793 int lh_offset = klassOopDesc::header_size() * HeapWordSize + | |
1794 Klass::layout_helper_offset_in_bytes(); | |
1795 Address src_klass_lh_addr(rcx_src_klass, lh_offset); | |
1796 | |
1797 // Handle objArrays completely differently... | |
1798 jint objArray_lh = Klass::array_layout_helper(T_OBJECT); | |
1799 __ cmpl(src_klass_lh_addr, objArray_lh); | |
1800 __ jcc(Assembler::equal, L_objArray); | |
1801 | |
1802 // if (src->klass() != dst->klass()) return -1; | |
304 | 1803 __ cmpptr(rcx_src_klass, dst_klass_addr); |
0 | 1804 __ jccb(Assembler::notEqual, L_failed_0); |
1805 | |
1806 const Register rcx_lh = rcx; // layout helper | |
1807 assert(rcx_lh == rcx_src_klass, "known alias"); | |
1808 __ movl(rcx_lh, src_klass_lh_addr); | |
1809 | |
1810 // if (!src->is_Array()) return -1; | |
1811 __ cmpl(rcx_lh, Klass::_lh_neutral_value); | |
1812 __ jcc(Assembler::greaterEqual, L_failed_0); // signed cmp | |
1813 | |
1814 // At this point, it is known to be a typeArray (array_tag 0x3). | |
1815 #ifdef ASSERT | |
1816 { Label L; | |
1817 __ cmpl(rcx_lh, (Klass::_lh_array_tag_type_value << Klass::_lh_array_tag_shift)); | |
1818 __ jcc(Assembler::greaterEqual, L); // signed cmp | |
1819 __ stop("must be a primitive array"); | |
1820 __ bind(L); | |
1821 } | |
1822 #endif | |
1823 | |
1824 assert_different_registers(src, src_pos, dst, dst_pos, rcx_lh); | |
1825 arraycopy_range_checks(src, src_pos, dst, dst_pos, LENGTH, L_failed); | |
1826 | |
1827 // typeArrayKlass | |
1828 // | |
1829 // src_addr = (src + array_header_in_bytes()) + (src_pos << log2elemsize); | |
1830 // dst_addr = (dst + array_header_in_bytes()) + (dst_pos << log2elemsize); | |
1831 // | |
1832 const Register rsi_offset = rsi; // array offset | |
1833 const Register src_array = src; // src array offset | |
1834 const Register dst_array = dst; // dst array offset | |
1835 const Register rdi_elsize = rdi; // log2 element size | |
1836 | |
304 | 1837 __ mov(rsi_offset, rcx_lh); |
1838 __ shrptr(rsi_offset, Klass::_lh_header_size_shift); | |
1839 __ andptr(rsi_offset, Klass::_lh_header_size_mask); // array_offset | |
1840 __ addptr(src_array, rsi_offset); // src array offset | |
1841 __ addptr(dst_array, rsi_offset); // dst array offset | |
1842 __ andptr(rcx_lh, Klass::_lh_log2_element_size_mask); // log2 elsize | |
0 | 1843 |
1844 // next registers should be set before the jump to corresponding stub | |
1845 const Register from = src; // source array address | |
1846 const Register to = dst; // destination array address | |
1847 const Register count = rcx; // elements count | |
1848 // some of them should be duplicated on stack | |
1849 #define FROM Address(rsp, 12+ 4) | |
1850 #define TO Address(rsp, 12+ 8) // Not used now | |
1851 #define COUNT Address(rsp, 12+12) // Only for oop arraycopy | |
1852 | |
1853 BLOCK_COMMENT("scale indexes to element size"); | |
304 | 1854 __ movl2ptr(rsi, SRC_POS); // src_pos |
1855 __ shlptr(rsi); // src_pos << rcx (log2 elsize) | |
0 | 1856 assert(src_array == from, ""); |
304 | 1857 __ addptr(from, rsi); // from = src_array + SRC_POS << log2 elsize |
1858 __ movl2ptr(rdi, DST_POS); // dst_pos | |
1859 __ shlptr(rdi); // dst_pos << rcx (log2 elsize) | |
0 | 1860 assert(dst_array == to, ""); |
304 | 1861 __ addptr(to, rdi); // to = dst_array + DST_POS << log2 elsize |
1862 __ movptr(FROM, from); // src_addr | |
1863 __ mov(rdi_elsize, rcx_lh); // log2 elsize | |
1864 __ movl2ptr(count, LENGTH); // elements count | |
0 | 1865 |
1866 BLOCK_COMMENT("choose copy loop based on element size"); | |
1867 __ cmpl(rdi_elsize, 0); | |
1868 | |
1869 __ jump_cc(Assembler::equal, RuntimeAddress(entry_jbyte_arraycopy)); | |
1870 __ cmpl(rdi_elsize, LogBytesPerShort); | |
1871 __ jump_cc(Assembler::equal, RuntimeAddress(entry_jshort_arraycopy)); | |
1872 __ cmpl(rdi_elsize, LogBytesPerInt); | |
1873 __ jump_cc(Assembler::equal, RuntimeAddress(entry_jint_arraycopy)); | |
1874 #ifdef ASSERT | |
1875 __ cmpl(rdi_elsize, LogBytesPerLong); | |
1876 __ jccb(Assembler::notEqual, L_failed); | |
1877 #endif | |
304 | 1878 __ pop(rdi); // Do pops here since jlong_arraycopy stub does not do it. |
1879 __ pop(rsi); | |
0 | 1880 __ jump(RuntimeAddress(entry_jlong_arraycopy)); |
1881 | |
1882 __ BIND(L_failed); | |
304 | 1883 __ xorptr(rax, rax); |
1884 __ notptr(rax); // return -1 | |
1885 __ pop(rdi); | |
1886 __ pop(rsi); | |
0 | 1887 __ leave(); // required for proper stackwalking of RuntimeStub frame |
1888 __ ret(0); | |
1889 | |
1890 // objArrayKlass | |
1891 __ BIND(L_objArray); | |
1892 // live at this point: rcx_src_klass, src[_pos], dst[_pos] | |
1893 | |
1894 Label L_plain_copy, L_checkcast_copy; | |
1895 // test array classes for subtyping | |
304 | 1896 __ cmpptr(rcx_src_klass, dst_klass_addr); // usual case is exact equality |
0 | 1897 __ jccb(Assembler::notEqual, L_checkcast_copy); |
1898 | |
1899 // Identically typed arrays can be copied without element-wise checks. | |
1900 assert_different_registers(src, src_pos, dst, dst_pos, rcx_src_klass); | |
1901 arraycopy_range_checks(src, src_pos, dst, dst_pos, LENGTH, L_failed); | |
1902 | |
1903 __ BIND(L_plain_copy); | |
304 | 1904 __ movl2ptr(count, LENGTH); // elements count |
1905 __ movl2ptr(src_pos, SRC_POS); // reload src_pos | |
1906 __ lea(from, Address(src, src_pos, Address::times_ptr, | |
1907 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); // src_addr | |
1908 __ movl2ptr(dst_pos, DST_POS); // reload dst_pos | |
1909 __ lea(to, Address(dst, dst_pos, Address::times_ptr, | |
1910 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); // dst_addr | |
1911 __ movptr(FROM, from); // src_addr | |
1912 __ movptr(TO, to); // dst_addr | |
0 | 1913 __ movl(COUNT, count); // count |
1914 __ jump(RuntimeAddress(entry_oop_arraycopy)); | |
1915 | |
1916 __ BIND(L_checkcast_copy); | |
1917 // live at this point: rcx_src_klass, dst[_pos], src[_pos] | |
1918 { | |
1919 // Handy offsets: | |
1920 int ek_offset = (klassOopDesc::header_size() * HeapWordSize + | |
1921 objArrayKlass::element_klass_offset_in_bytes()); | |
1922 int sco_offset = (klassOopDesc::header_size() * HeapWordSize + | |
1923 Klass::super_check_offset_offset_in_bytes()); | |
1924 | |
1925 Register rsi_dst_klass = rsi; | |
1926 Register rdi_temp = rdi; | |
1927 assert(rsi_dst_klass == src_pos, "expected alias w/ src_pos"); | |
1928 assert(rdi_temp == dst_pos, "expected alias w/ dst_pos"); | |
1929 Address dst_klass_lh_addr(rsi_dst_klass, lh_offset); | |
1930 | |
1931 // Before looking at dst.length, make sure dst is also an objArray. | |
304 | 1932 __ movptr(rsi_dst_klass, dst_klass_addr); |
0 | 1933 __ cmpl(dst_klass_lh_addr, objArray_lh); |
1934 __ jccb(Assembler::notEqual, L_failed); | |
1935 | |
1936 // It is safe to examine both src.length and dst.length. | |
304 | 1937 __ movl2ptr(src_pos, SRC_POS); // reload rsi |
0 | 1938 arraycopy_range_checks(src, src_pos, dst, dst_pos, LENGTH, L_failed); |
1939 // (Now src_pos and dst_pos are killed, but not src and dst.) | |
1940 | |
1941 // We'll need this temp (don't forget to pop it after the type check). | |
304 | 1942 __ push(rbx); |
0 | 1943 Register rbx_src_klass = rbx; |
1944 | |
304 | 1945 __ mov(rbx_src_klass, rcx_src_klass); // spill away from rcx |
1946 __ movptr(rsi_dst_klass, dst_klass_addr); | |
0 | 1947 Address super_check_offset_addr(rsi_dst_klass, sco_offset); |
1948 Label L_fail_array_check; | |
1949 generate_type_check(rbx_src_klass, | |
1950 super_check_offset_addr, dst_klass_addr, | |
1951 rdi_temp, NULL, &L_fail_array_check); | |
1952 // (On fall-through, we have passed the array type check.) | |
304 | 1953 __ pop(rbx); |
0 | 1954 __ jmp(L_plain_copy); |
1955 | |
1956 __ BIND(L_fail_array_check); | |
1957 // Reshuffle arguments so we can call checkcast_arraycopy: | |
1958 | |
1959 // match initial saves for checkcast_arraycopy | |
304 | 1960 // push(rsi); // already done; see above |
1961 // push(rdi); // already done; see above | |
1962 // push(rbx); // already done; see above | |
0 | 1963 |
1964 // Marshal outgoing arguments now, freeing registers. | |
1965 Address from_arg(rsp, 16+ 4); // from | |
1966 Address to_arg(rsp, 16+ 8); // to | |
1967 Address length_arg(rsp, 16+12); // elements count | |
1968 Address ckoff_arg(rsp, 16+16); // super_check_offset | |
1969 Address ckval_arg(rsp, 16+20); // super_klass | |
1970 | |
1971 Address SRC_POS_arg(rsp, 16+ 8); | |
1972 Address DST_POS_arg(rsp, 16+16); | |
1973 Address LENGTH_arg(rsp, 16+20); | |
1974 // push rbx, changed the incoming offsets (why not just use rbp,??) | |
1975 // assert(SRC_POS_arg.disp() == SRC_POS.disp() + 4, ""); | |
1976 | |
304 | 1977 __ movptr(rbx, Address(rsi_dst_klass, ek_offset)); |
1978 __ movl2ptr(length, LENGTH_arg); // reload elements count | |
1979 __ movl2ptr(src_pos, SRC_POS_arg); // reload src_pos | |
1980 __ movl2ptr(dst_pos, DST_POS_arg); // reload dst_pos | |
0 | 1981 |
304 | 1982 __ movptr(ckval_arg, rbx); // destination element type |
0 | 1983 __ movl(rbx, Address(rbx, sco_offset)); |
1984 __ movl(ckoff_arg, rbx); // corresponding class check offset | |
1985 | |
1986 __ movl(length_arg, length); // outgoing length argument | |
1987 | |
304 | 1988 __ lea(from, Address(src, src_pos, Address::times_ptr, |
0 | 1989 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
304 | 1990 __ movptr(from_arg, from); |
0 | 1991 |
304 | 1992 __ lea(to, Address(dst, dst_pos, Address::times_ptr, |
0 | 1993 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
304 | 1994 __ movptr(to_arg, to); |
0 | 1995 __ jump(RuntimeAddress(entry_checkcast_arraycopy)); |
1996 } | |
1997 | |
1998 return start; | |
1999 } | |
2000 | |
2001 void generate_arraycopy_stubs() { | |
2002 address entry; | |
2003 address entry_jbyte_arraycopy; | |
2004 address entry_jshort_arraycopy; | |
2005 address entry_jint_arraycopy; | |
2006 address entry_oop_arraycopy; | |
2007 address entry_jlong_arraycopy; | |
2008 address entry_checkcast_arraycopy; | |
2009 | |
2010 StubRoutines::_arrayof_jbyte_disjoint_arraycopy = | |
2011 generate_disjoint_copy(T_BYTE, true, Address::times_1, &entry, | |
2012 "arrayof_jbyte_disjoint_arraycopy"); | |
2013 StubRoutines::_arrayof_jbyte_arraycopy = | |
2014 generate_conjoint_copy(T_BYTE, true, Address::times_1, entry, | |
2015 NULL, "arrayof_jbyte_arraycopy"); | |
2016 StubRoutines::_jbyte_disjoint_arraycopy = | |
2017 generate_disjoint_copy(T_BYTE, false, Address::times_1, &entry, | |
2018 "jbyte_disjoint_arraycopy"); | |
2019 StubRoutines::_jbyte_arraycopy = | |
2020 generate_conjoint_copy(T_BYTE, false, Address::times_1, entry, | |
2021 &entry_jbyte_arraycopy, "jbyte_arraycopy"); | |
2022 | |
2023 StubRoutines::_arrayof_jshort_disjoint_arraycopy = | |
2024 generate_disjoint_copy(T_SHORT, true, Address::times_2, &entry, | |
2025 "arrayof_jshort_disjoint_arraycopy"); | |
2026 StubRoutines::_arrayof_jshort_arraycopy = | |
2027 generate_conjoint_copy(T_SHORT, true, Address::times_2, entry, | |
2028 NULL, "arrayof_jshort_arraycopy"); | |
2029 StubRoutines::_jshort_disjoint_arraycopy = | |
2030 generate_disjoint_copy(T_SHORT, false, Address::times_2, &entry, | |
2031 "jshort_disjoint_arraycopy"); | |
2032 StubRoutines::_jshort_arraycopy = | |
2033 generate_conjoint_copy(T_SHORT, false, Address::times_2, entry, | |
2034 &entry_jshort_arraycopy, "jshort_arraycopy"); | |
2035 | |
2036 // Next arrays are always aligned on 4 bytes at least. | |
2037 StubRoutines::_jint_disjoint_arraycopy = | |
2038 generate_disjoint_copy(T_INT, true, Address::times_4, &entry, | |
2039 "jint_disjoint_arraycopy"); | |
2040 StubRoutines::_jint_arraycopy = | |
2041 generate_conjoint_copy(T_INT, true, Address::times_4, entry, | |
2042 &entry_jint_arraycopy, "jint_arraycopy"); | |
2043 | |
2044 StubRoutines::_oop_disjoint_arraycopy = | |
304 | 2045 generate_disjoint_copy(T_OBJECT, true, Address::times_ptr, &entry, |
0 | 2046 "oop_disjoint_arraycopy"); |
2047 StubRoutines::_oop_arraycopy = | |
304 | 2048 generate_conjoint_copy(T_OBJECT, true, Address::times_ptr, entry, |
0 | 2049 &entry_oop_arraycopy, "oop_arraycopy"); |
2050 | |
2051 StubRoutines::_jlong_disjoint_arraycopy = | |
2052 generate_disjoint_long_copy(&entry, "jlong_disjoint_arraycopy"); | |
2053 StubRoutines::_jlong_arraycopy = | |
2054 generate_conjoint_long_copy(entry, &entry_jlong_arraycopy, | |
2055 "jlong_arraycopy"); | |
2056 | |
1763 | 2057 StubRoutines::_jbyte_fill = generate_fill(T_BYTE, false, "jbyte_fill"); |
2058 StubRoutines::_jshort_fill = generate_fill(T_SHORT, false, "jshort_fill"); | |
2059 StubRoutines::_jint_fill = generate_fill(T_INT, false, "jint_fill"); | |
2060 StubRoutines::_arrayof_jbyte_fill = generate_fill(T_BYTE, true, "arrayof_jbyte_fill"); | |
2061 StubRoutines::_arrayof_jshort_fill = generate_fill(T_SHORT, true, "arrayof_jshort_fill"); | |
2062 StubRoutines::_arrayof_jint_fill = generate_fill(T_INT, true, "arrayof_jint_fill"); | |
2063 | |
0 | 2064 StubRoutines::_arrayof_jint_disjoint_arraycopy = |
2065 StubRoutines::_jint_disjoint_arraycopy; | |
2066 StubRoutines::_arrayof_oop_disjoint_arraycopy = | |
2067 StubRoutines::_oop_disjoint_arraycopy; | |
2068 StubRoutines::_arrayof_jlong_disjoint_arraycopy = | |
2069 StubRoutines::_jlong_disjoint_arraycopy; | |
2070 | |
2071 StubRoutines::_arrayof_jint_arraycopy = StubRoutines::_jint_arraycopy; | |
2072 StubRoutines::_arrayof_oop_arraycopy = StubRoutines::_oop_arraycopy; | |
2073 StubRoutines::_arrayof_jlong_arraycopy = StubRoutines::_jlong_arraycopy; | |
2074 | |
2075 StubRoutines::_checkcast_arraycopy = | |
2076 generate_checkcast_copy("checkcast_arraycopy", | |
2077 &entry_checkcast_arraycopy); | |
2078 | |
2079 StubRoutines::_unsafe_arraycopy = | |
2080 generate_unsafe_copy("unsafe_arraycopy", | |
2081 entry_jbyte_arraycopy, | |
2082 entry_jshort_arraycopy, | |
2083 entry_jint_arraycopy, | |
2084 entry_jlong_arraycopy); | |
2085 | |
2086 StubRoutines::_generic_arraycopy = | |
2087 generate_generic_copy("generic_arraycopy", | |
2088 entry_jbyte_arraycopy, | |
2089 entry_jshort_arraycopy, | |
2090 entry_jint_arraycopy, | |
2091 entry_oop_arraycopy, | |
2092 entry_jlong_arraycopy, | |
2093 entry_checkcast_arraycopy); | |
2094 } | |
2095 | |
1174
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2096 void generate_math_stubs() { |
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2097 { |
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2098 StubCodeMark mark(this, "StubRoutines", "log"); |
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2099 StubRoutines::_intrinsic_log = (double (*)(double)) __ pc(); |
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2100 |
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2101 __ fld_d(Address(rsp, 4)); |
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2102 __ flog(); |
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2103 __ ret(0); |
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2104 } |
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2105 { |
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2106 StubCodeMark mark(this, "StubRoutines", "log10"); |
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2107 StubRoutines::_intrinsic_log10 = (double (*)(double)) __ pc(); |
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2108 |
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2109 __ fld_d(Address(rsp, 4)); |
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2110 __ flog10(); |
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2111 __ ret(0); |
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2112 } |
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2113 { |
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2114 StubCodeMark mark(this, "StubRoutines", "sin"); |
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2115 StubRoutines::_intrinsic_sin = (double (*)(double)) __ pc(); |
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2116 |
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2117 __ fld_d(Address(rsp, 4)); |
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2118 __ trigfunc('s'); |
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2119 __ ret(0); |
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2120 } |
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2121 { |
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2122 StubCodeMark mark(this, "StubRoutines", "cos"); |
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2123 StubRoutines::_intrinsic_cos = (double (*)(double)) __ pc(); |
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2124 |
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2125 __ fld_d(Address(rsp, 4)); |
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2126 __ trigfunc('c'); |
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2127 __ ret(0); |
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2128 } |
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2129 { |
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2130 StubCodeMark mark(this, "StubRoutines", "tan"); |
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2131 StubRoutines::_intrinsic_tan = (double (*)(double)) __ pc(); |
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2132 |
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2133 __ fld_d(Address(rsp, 4)); |
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2134 __ trigfunc('t'); |
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2135 __ ret(0); |
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2136 } |
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2137 |
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2138 // The intrinsic version of these seem to return the same value as |
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2139 // the strict version. |
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2140 StubRoutines::_intrinsic_exp = SharedRuntime::dexp; |
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2141 StubRoutines::_intrinsic_pow = SharedRuntime::dpow; |
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2142 } |
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2143 |
0 | 2144 public: |
2145 // Information about frame layout at time of blocking runtime call. | |
2146 // Note that we only have to preserve callee-saved registers since | |
2147 // the compilers are responsible for supplying a continuation point | |
2148 // if they expect all registers to be preserved. | |
2149 enum layout { | |
2150 thread_off, // last_java_sp | |
2151 rbp_off, // callee saved register | |
2152 ret_pc, | |
2153 framesize | |
2154 }; | |
2155 | |
2156 private: | |
2157 | |
2158 #undef __ | |
2159 #define __ masm-> | |
2160 | |
2161 //------------------------------------------------------------------------------------------------------------------------ | |
2162 // Continuation point for throwing of implicit exceptions that are not handled in | |
2163 // the current activation. Fabricates an exception oop and initiates normal | |
2164 // exception dispatching in this frame. | |
2165 // | |
2166 // Previously the compiler (c2) allowed for callee save registers on Java calls. | |
2167 // This is no longer true after adapter frames were removed but could possibly | |
2168 // be brought back in the future if the interpreter code was reworked and it | |
2169 // was deemed worthwhile. The comment below was left to describe what must | |
2170 // happen here if callee saves were resurrected. As it stands now this stub | |
2171 // could actually be a vanilla BufferBlob and have now oopMap at all. | |
2172 // Since it doesn't make much difference we've chosen to leave it the | |
2173 // way it was in the callee save days and keep the comment. | |
2174 | |
2175 // If we need to preserve callee-saved values we need a callee-saved oop map and | |
2176 // therefore have to make these stubs into RuntimeStubs rather than BufferBlobs. | |
2177 // If the compiler needs all registers to be preserved between the fault | |
2178 // point and the exception handler then it must assume responsibility for that in | |
2179 // AbstractCompiler::continuation_for_implicit_null_exception or | |
2180 // continuation_for_implicit_division_by_zero_exception. All other implicit | |
2181 // exceptions (e.g., NullPointerException or AbstractMethodError on entry) are | |
2182 // either at call sites or otherwise assume that stack unwinding will be initiated, | |
2183 // so caller saved registers were assumed volatile in the compiler. | |
2184 address generate_throw_exception(const char* name, address runtime_entry, | |
2185 bool restore_saved_exception_pc) { | |
2186 | |
2187 int insts_size = 256; | |
2188 int locs_size = 32; | |
2189 | |
2190 CodeBuffer code(name, insts_size, locs_size); | |
2191 OopMapSet* oop_maps = new OopMapSet(); | |
2192 MacroAssembler* masm = new MacroAssembler(&code); | |
2193 | |
2194 address start = __ pc(); | |
2195 | |
2196 // This is an inlined and slightly modified version of call_VM | |
2197 // which has the ability to fetch the return PC out of | |
2198 // thread-local storage and also sets up last_Java_sp slightly | |
2199 // differently than the real call_VM | |
2200 Register java_thread = rbx; | |
2201 __ get_thread(java_thread); | |
2202 if (restore_saved_exception_pc) { | |
304 | 2203 __ movptr(rax, Address(java_thread, in_bytes(JavaThread::saved_exception_pc_offset()))); |
2204 __ push(rax); | |
0 | 2205 } |
2206 | |
2207 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
2208 | |
2209 // pc and rbp, already pushed | |
304 | 2210 __ subptr(rsp, (framesize-2) * wordSize); // prolog |
0 | 2211 |
2212 // Frame is now completed as far as size and linkage. | |
2213 | |
2214 int frame_complete = __ pc() - start; | |
2215 | |
2216 // push java thread (becomes first argument of C function) | |
304 | 2217 __ movptr(Address(rsp, thread_off * wordSize), java_thread); |
0 | 2218 |
2219 // Set up last_Java_sp and last_Java_fp | |
2220 __ set_last_Java_frame(java_thread, rsp, rbp, NULL); | |
2221 | |
2222 // Call runtime | |
2223 BLOCK_COMMENT("call runtime_entry"); | |
2224 __ call(RuntimeAddress(runtime_entry)); | |
2225 // Generate oop map | |
2226 OopMap* map = new OopMap(framesize, 0); | |
2227 oop_maps->add_gc_map(__ pc() - start, map); | |
2228 | |
2229 // restore the thread (cannot use the pushed argument since arguments | |
2230 // may be overwritten by C code generated by an optimizing compiler); | |
2231 // however can use the register value directly if it is callee saved. | |
2232 __ get_thread(java_thread); | |
2233 | |
2234 __ reset_last_Java_frame(java_thread, true, false); | |
2235 | |
2236 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
2237 | |
2238 // check for pending exceptions | |
2239 #ifdef ASSERT | |
2240 Label L; | |
304 | 2241 __ cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 2242 __ jcc(Assembler::notEqual, L); |
2243 __ should_not_reach_here(); | |
2244 __ bind(L); | |
2245 #endif /* ASSERT */ | |
2246 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
2247 | |
2248 | |
2249 RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &code, frame_complete, framesize, oop_maps, false); | |
2250 return stub->entry_point(); | |
2251 } | |
2252 | |
2253 | |
2254 void create_control_words() { | |
2255 // Round to nearest, 53-bit mode, exceptions masked | |
2256 StubRoutines::_fpu_cntrl_wrd_std = 0x027F; | |
2257 // Round to zero, 53-bit mode, exception mased | |
2258 StubRoutines::_fpu_cntrl_wrd_trunc = 0x0D7F; | |
2259 // Round to nearest, 24-bit mode, exceptions masked | |
2260 StubRoutines::_fpu_cntrl_wrd_24 = 0x007F; | |
2261 // Round to nearest, 64-bit mode, exceptions masked | |
2262 StubRoutines::_fpu_cntrl_wrd_64 = 0x037F; | |
2263 // Round to nearest, 64-bit mode, exceptions masked | |
2264 StubRoutines::_mxcsr_std = 0x1F80; | |
2265 // Note: the following two constants are 80-bit values | |
2266 // layout is critical for correct loading by FPU. | |
2267 // Bias for strict fp multiply/divide | |
2268 StubRoutines::_fpu_subnormal_bias1[0]= 0x00000000; // 2^(-15360) == 0x03ff 8000 0000 0000 0000 | |
2269 StubRoutines::_fpu_subnormal_bias1[1]= 0x80000000; | |
2270 StubRoutines::_fpu_subnormal_bias1[2]= 0x03ff; | |
2271 // Un-Bias for strict fp multiply/divide | |
2272 StubRoutines::_fpu_subnormal_bias2[0]= 0x00000000; // 2^(+15360) == 0x7bff 8000 0000 0000 0000 | |
2273 StubRoutines::_fpu_subnormal_bias2[1]= 0x80000000; | |
2274 StubRoutines::_fpu_subnormal_bias2[2]= 0x7bff; | |
2275 } | |
2276 | |
2277 //--------------------------------------------------------------------------- | |
2278 // Initialization | |
2279 | |
2280 void generate_initial() { | |
2281 // Generates all stubs and initializes the entry points | |
2282 | |
2283 //------------------------------------------------------------------------------------------------------------------------ | |
2284 // entry points that exist in all platforms | |
2285 // Note: This is code that could be shared among different platforms - however the benefit seems to be smaller than | |
2286 // the disadvantage of having a much more complicated generator structure. See also comment in stubRoutines.hpp. | |
2287 StubRoutines::_forward_exception_entry = generate_forward_exception(); | |
2288 | |
2289 StubRoutines::_call_stub_entry = | |
2290 generate_call_stub(StubRoutines::_call_stub_return_address); | |
2291 // is referenced by megamorphic call | |
2292 StubRoutines::_catch_exception_entry = generate_catch_exception(); | |
2293 | |
2294 // These are currently used by Solaris/Intel | |
2295 StubRoutines::_atomic_xchg_entry = generate_atomic_xchg(); | |
2296 | |
2297 StubRoutines::_handler_for_unsafe_access_entry = | |
2298 generate_handler_for_unsafe_access(); | |
2299 | |
2300 // platform dependent | |
2301 create_control_words(); | |
2302 | |
304 | 2303 StubRoutines::x86::_verify_mxcsr_entry = generate_verify_mxcsr(); |
2304 StubRoutines::x86::_verify_fpu_cntrl_wrd_entry = generate_verify_fpu_cntrl_wrd(); | |
0 | 2305 StubRoutines::_d2i_wrapper = generate_d2i_wrapper(T_INT, |
2306 CAST_FROM_FN_PTR(address, SharedRuntime::d2i)); | |
2307 StubRoutines::_d2l_wrapper = generate_d2i_wrapper(T_LONG, | |
2308 CAST_FROM_FN_PTR(address, SharedRuntime::d2l)); | |
2309 } | |
2310 | |
2311 | |
2312 void generate_all() { | |
2313 // Generates all stubs and initializes the entry points | |
2314 | |
2315 // These entry points require SharedInfo::stack0 to be set up in non-core builds | |
2316 // and need to be relocatable, so they each fabricate a RuntimeStub internally. | |
2317 StubRoutines::_throw_AbstractMethodError_entry = generate_throw_exception("AbstractMethodError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_AbstractMethodError), false); | |
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2318 StubRoutines::_throw_IncompatibleClassChangeError_entry= generate_throw_exception("IncompatibleClassChangeError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_IncompatibleClassChangeError), false); |
0 | 2319 StubRoutines::_throw_ArithmeticException_entry = generate_throw_exception("ArithmeticException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_ArithmeticException), true); |
2320 StubRoutines::_throw_NullPointerException_entry = generate_throw_exception("NullPointerException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException), true); | |
2321 StubRoutines::_throw_NullPointerException_at_call_entry= generate_throw_exception("NullPointerException at call throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException_at_call), false); | |
2322 StubRoutines::_throw_StackOverflowError_entry = generate_throw_exception("StackOverflowError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_StackOverflowError), false); | |
2323 | |
2324 //------------------------------------------------------------------------------------------------------------------------ | |
2325 // entry points that are platform specific | |
2326 | |
2327 // support for verify_oop (must happen after universe_init) | |
2328 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop(); | |
2329 | |
2330 // arraycopy stubs used by compilers | |
2331 generate_arraycopy_stubs(); | |
710 | 2332 |
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2333 generate_math_stubs(); |
0 | 2334 } |
2335 | |
2336 | |
2337 public: | |
2338 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { | |
2339 if (all) { | |
2340 generate_all(); | |
2341 } else { | |
2342 generate_initial(); | |
2343 } | |
2344 } | |
2345 }; // end class declaration | |
2346 | |
2347 | |
2348 void StubGenerator_generate(CodeBuffer* code, bool all) { | |
2349 StubGenerator g(code, all); | |
2350 } |