1
|
1 |
/*
|
|
2 |
* Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved.
|
|
3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
4 |
*
|
|
5 |
* This code is free software; you can redistribute it and/or modify it
|
|
6 |
* under the terms of the GNU General Public License version 2 only, as
|
|
7 |
* published by the Free Software Foundation.
|
|
8 |
*
|
|
9 |
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
10 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
11 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
12 |
* version 2 for more details (a copy is included in the LICENSE file that
|
|
13 |
* accompanied this code).
|
|
14 |
*
|
|
15 |
* You should have received a copy of the GNU General Public License version
|
|
16 |
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
17 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
18 |
*
|
|
19 |
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
20 |
* CA 95054 USA or visit www.sun.com if you need additional information or
|
|
21 |
* have any questions.
|
|
22 |
*
|
|
23 |
*/
|
|
24 |
|
|
25 |
#include "incls/_precompiled.incl"
|
|
26 |
#include "incls/_stubGenerator_x86_64.cpp.incl"
|
|
27 |
|
|
28 |
// Declaration and definition of StubGenerator (no .hpp file).
|
|
29 |
// For a more detailed description of the stub routine structure
|
|
30 |
// see the comment in stubRoutines.hpp
|
|
31 |
|
|
32 |
#define __ _masm->
|
|
33 |
|
|
34 |
#ifdef PRODUCT
|
|
35 |
#define BLOCK_COMMENT(str) /* nothing */
|
|
36 |
#else
|
|
37 |
#define BLOCK_COMMENT(str) __ block_comment(str)
|
|
38 |
#endif
|
|
39 |
|
|
40 |
#define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
|
|
41 |
const int MXCSR_MASK = 0xFFC0; // Mask out any pending exceptions
|
|
42 |
|
|
43 |
// Stub Code definitions
|
|
44 |
|
|
45 |
static address handle_unsafe_access() {
|
|
46 |
JavaThread* thread = JavaThread::current();
|
|
47 |
address pc = thread->saved_exception_pc();
|
|
48 |
// pc is the instruction which we must emulate
|
|
49 |
// doing a no-op is fine: return garbage from the load
|
|
50 |
// therefore, compute npc
|
|
51 |
address npc = Assembler::locate_next_instruction(pc);
|
|
52 |
|
|
53 |
// request an async exception
|
|
54 |
thread->set_pending_unsafe_access_error();
|
|
55 |
|
|
56 |
// return address of next instruction to execute
|
|
57 |
return npc;
|
|
58 |
}
|
|
59 |
|
|
60 |
class StubGenerator: public StubCodeGenerator {
|
|
61 |
private:
|
|
62 |
|
|
63 |
#ifdef PRODUCT
|
|
64 |
#define inc_counter_np(counter) (0)
|
|
65 |
#else
|
|
66 |
void inc_counter_np_(int& counter) {
|
|
67 |
__ incrementl(ExternalAddress((address)&counter));
|
|
68 |
}
|
|
69 |
#define inc_counter_np(counter) \
|
|
70 |
BLOCK_COMMENT("inc_counter " #counter); \
|
|
71 |
inc_counter_np_(counter);
|
|
72 |
#endif
|
|
73 |
|
|
74 |
// Call stubs are used to call Java from C
|
|
75 |
//
|
|
76 |
// Linux Arguments:
|
|
77 |
// c_rarg0: call wrapper address address
|
|
78 |
// c_rarg1: result address
|
|
79 |
// c_rarg2: result type BasicType
|
|
80 |
// c_rarg3: method methodOop
|
|
81 |
// c_rarg4: (interpreter) entry point address
|
|
82 |
// c_rarg5: parameters intptr_t*
|
|
83 |
// 16(rbp): parameter size (in words) int
|
|
84 |
// 24(rbp): thread Thread*
|
|
85 |
//
|
|
86 |
// [ return_from_Java ] <--- rsp
|
|
87 |
// [ argument word n ]
|
|
88 |
// ...
|
|
89 |
// -12 [ argument word 1 ]
|
|
90 |
// -11 [ saved r15 ] <--- rsp_after_call
|
|
91 |
// -10 [ saved r14 ]
|
|
92 |
// -9 [ saved r13 ]
|
|
93 |
// -8 [ saved r12 ]
|
|
94 |
// -7 [ saved rbx ]
|
|
95 |
// -6 [ call wrapper ]
|
|
96 |
// -5 [ result ]
|
|
97 |
// -4 [ result type ]
|
|
98 |
// -3 [ method ]
|
|
99 |
// -2 [ entry point ]
|
|
100 |
// -1 [ parameters ]
|
|
101 |
// 0 [ saved rbp ] <--- rbp
|
|
102 |
// 1 [ return address ]
|
|
103 |
// 2 [ parameter size ]
|
|
104 |
// 3 [ thread ]
|
|
105 |
//
|
|
106 |
// Windows Arguments:
|
|
107 |
// c_rarg0: call wrapper address address
|
|
108 |
// c_rarg1: result address
|
|
109 |
// c_rarg2: result type BasicType
|
|
110 |
// c_rarg3: method methodOop
|
|
111 |
// 48(rbp): (interpreter) entry point address
|
|
112 |
// 56(rbp): parameters intptr_t*
|
|
113 |
// 64(rbp): parameter size (in words) int
|
|
114 |
// 72(rbp): thread Thread*
|
|
115 |
//
|
|
116 |
// [ return_from_Java ] <--- rsp
|
|
117 |
// [ argument word n ]
|
|
118 |
// ...
|
|
119 |
// -8 [ argument word 1 ]
|
|
120 |
// -7 [ saved r15 ] <--- rsp_after_call
|
|
121 |
// -6 [ saved r14 ]
|
|
122 |
// -5 [ saved r13 ]
|
|
123 |
// -4 [ saved r12 ]
|
|
124 |
// -3 [ saved rdi ]
|
|
125 |
// -2 [ saved rsi ]
|
|
126 |
// -1 [ saved rbx ]
|
|
127 |
// 0 [ saved rbp ] <--- rbp
|
|
128 |
// 1 [ return address ]
|
|
129 |
// 2 [ call wrapper ]
|
|
130 |
// 3 [ result ]
|
|
131 |
// 4 [ result type ]
|
|
132 |
// 5 [ method ]
|
|
133 |
// 6 [ entry point ]
|
|
134 |
// 7 [ parameters ]
|
|
135 |
// 8 [ parameter size ]
|
|
136 |
// 9 [ thread ]
|
|
137 |
//
|
|
138 |
// Windows reserves the callers stack space for arguments 1-4.
|
|
139 |
// We spill c_rarg0-c_rarg3 to this space.
|
|
140 |
|
|
141 |
// Call stub stack layout word offsets from rbp
|
|
142 |
enum call_stub_layout {
|
|
143 |
#ifdef _WIN64
|
|
144 |
rsp_after_call_off = -7,
|
|
145 |
r15_off = rsp_after_call_off,
|
|
146 |
r14_off = -6,
|
|
147 |
r13_off = -5,
|
|
148 |
r12_off = -4,
|
|
149 |
rdi_off = -3,
|
|
150 |
rsi_off = -2,
|
|
151 |
rbx_off = -1,
|
|
152 |
rbp_off = 0,
|
|
153 |
retaddr_off = 1,
|
|
154 |
call_wrapper_off = 2,
|
|
155 |
result_off = 3,
|
|
156 |
result_type_off = 4,
|
|
157 |
method_off = 5,
|
|
158 |
entry_point_off = 6,
|
|
159 |
parameters_off = 7,
|
|
160 |
parameter_size_off = 8,
|
|
161 |
thread_off = 9
|
|
162 |
#else
|
|
163 |
rsp_after_call_off = -12,
|
|
164 |
mxcsr_off = rsp_after_call_off,
|
|
165 |
r15_off = -11,
|
|
166 |
r14_off = -10,
|
|
167 |
r13_off = -9,
|
|
168 |
r12_off = -8,
|
|
169 |
rbx_off = -7,
|
|
170 |
call_wrapper_off = -6,
|
|
171 |
result_off = -5,
|
|
172 |
result_type_off = -4,
|
|
173 |
method_off = -3,
|
|
174 |
entry_point_off = -2,
|
|
175 |
parameters_off = -1,
|
|
176 |
rbp_off = 0,
|
|
177 |
retaddr_off = 1,
|
|
178 |
parameter_size_off = 2,
|
|
179 |
thread_off = 3
|
|
180 |
#endif
|
|
181 |
};
|
|
182 |
|
|
183 |
address generate_call_stub(address& return_address) {
|
|
184 |
assert((int)frame::entry_frame_after_call_words == -(int)rsp_after_call_off + 1 &&
|
|
185 |
(int)frame::entry_frame_call_wrapper_offset == (int)call_wrapper_off,
|
|
186 |
"adjust this code");
|
|
187 |
StubCodeMark mark(this, "StubRoutines", "call_stub");
|
|
188 |
address start = __ pc();
|
|
189 |
|
|
190 |
// same as in generate_catch_exception()!
|
|
191 |
const Address rsp_after_call(rbp, rsp_after_call_off * wordSize);
|
|
192 |
|
|
193 |
const Address call_wrapper (rbp, call_wrapper_off * wordSize);
|
|
194 |
const Address result (rbp, result_off * wordSize);
|
|
195 |
const Address result_type (rbp, result_type_off * wordSize);
|
|
196 |
const Address method (rbp, method_off * wordSize);
|
|
197 |
const Address entry_point (rbp, entry_point_off * wordSize);
|
|
198 |
const Address parameters (rbp, parameters_off * wordSize);
|
|
199 |
const Address parameter_size(rbp, parameter_size_off * wordSize);
|
|
200 |
|
|
201 |
// same as in generate_catch_exception()!
|
|
202 |
const Address thread (rbp, thread_off * wordSize);
|
|
203 |
|
|
204 |
const Address r15_save(rbp, r15_off * wordSize);
|
|
205 |
const Address r14_save(rbp, r14_off * wordSize);
|
|
206 |
const Address r13_save(rbp, r13_off * wordSize);
|
|
207 |
const Address r12_save(rbp, r12_off * wordSize);
|
|
208 |
const Address rbx_save(rbp, rbx_off * wordSize);
|
|
209 |
|
|
210 |
// stub code
|
|
211 |
__ enter();
|
|
212 |
__ subq(rsp, -rsp_after_call_off * wordSize);
|
|
213 |
|
|
214 |
// save register parameters
|
|
215 |
#ifndef _WIN64
|
|
216 |
__ movq(parameters, c_rarg5); // parameters
|
|
217 |
__ movq(entry_point, c_rarg4); // entry_point
|
|
218 |
#endif
|
|
219 |
|
|
220 |
__ movq(method, c_rarg3); // method
|
|
221 |
__ movl(result_type, c_rarg2); // result type
|
|
222 |
__ movq(result, c_rarg1); // result
|
|
223 |
__ movq(call_wrapper, c_rarg0); // call wrapper
|
|
224 |
|
|
225 |
// save regs belonging to calling function
|
|
226 |
__ movq(rbx_save, rbx);
|
|
227 |
__ movq(r12_save, r12);
|
|
228 |
__ movq(r13_save, r13);
|
|
229 |
__ movq(r14_save, r14);
|
|
230 |
__ movq(r15_save, r15);
|
|
231 |
|
|
232 |
#ifdef _WIN64
|
|
233 |
const Address rdi_save(rbp, rdi_off * wordSize);
|
|
234 |
const Address rsi_save(rbp, rsi_off * wordSize);
|
|
235 |
|
|
236 |
__ movq(rsi_save, rsi);
|
|
237 |
__ movq(rdi_save, rdi);
|
|
238 |
#else
|
|
239 |
const Address mxcsr_save(rbp, mxcsr_off * wordSize);
|
|
240 |
{
|
|
241 |
Label skip_ldmx;
|
|
242 |
__ stmxcsr(mxcsr_save);
|
|
243 |
__ movl(rax, mxcsr_save);
|
|
244 |
__ andl(rax, MXCSR_MASK); // Only check control and mask bits
|
|
245 |
ExternalAddress mxcsr_std(StubRoutines::amd64::mxcsr_std());
|
|
246 |
__ cmp32(rax, mxcsr_std);
|
|
247 |
__ jcc(Assembler::equal, skip_ldmx);
|
|
248 |
__ ldmxcsr(mxcsr_std);
|
|
249 |
__ bind(skip_ldmx);
|
|
250 |
}
|
|
251 |
#endif
|
|
252 |
|
|
253 |
// Load up thread register
|
|
254 |
__ movq(r15_thread, thread);
|
|
255 |
|
|
256 |
#ifdef ASSERT
|
|
257 |
// make sure we have no pending exceptions
|
|
258 |
{
|
|
259 |
Label L;
|
|
260 |
__ cmpq(Address(r15_thread, Thread::pending_exception_offset()), (int)NULL_WORD);
|
|
261 |
__ jcc(Assembler::equal, L);
|
|
262 |
__ stop("StubRoutines::call_stub: entered with pending exception");
|
|
263 |
__ bind(L);
|
|
264 |
}
|
|
265 |
#endif
|
|
266 |
|
|
267 |
// pass parameters if any
|
|
268 |
BLOCK_COMMENT("pass parameters if any");
|
|
269 |
Label parameters_done;
|
|
270 |
__ movl(c_rarg3, parameter_size);
|
|
271 |
__ testl(c_rarg3, c_rarg3);
|
|
272 |
__ jcc(Assembler::zero, parameters_done);
|
|
273 |
|
|
274 |
Label loop;
|
|
275 |
__ movq(c_rarg2, parameters); // parameter pointer
|
|
276 |
__ movl(c_rarg1, c_rarg3); // parameter counter is in c_rarg1
|
|
277 |
__ BIND(loop);
|
|
278 |
if (TaggedStackInterpreter) {
|
|
279 |
__ movq(rax, Address(c_rarg2, 0)); // get tag
|
|
280 |
__ addq(c_rarg2, wordSize); // advance to next tag
|
|
281 |
__ pushq(rax); // pass tag
|
|
282 |
}
|
|
283 |
__ movq(rax, Address(c_rarg2, 0)); // get parameter
|
|
284 |
__ addq(c_rarg2, wordSize); // advance to next parameter
|
|
285 |
__ decrementl(c_rarg1); // decrement counter
|
|
286 |
__ pushq(rax); // pass parameter
|
|
287 |
__ jcc(Assembler::notZero, loop);
|
|
288 |
|
|
289 |
// call Java function
|
|
290 |
__ BIND(parameters_done);
|
|
291 |
__ movq(rbx, method); // get methodOop
|
|
292 |
__ movq(c_rarg1, entry_point); // get entry_point
|
|
293 |
__ movq(r13, rsp); // set sender sp
|
|
294 |
BLOCK_COMMENT("call Java function");
|
|
295 |
__ call(c_rarg1);
|
|
296 |
|
|
297 |
BLOCK_COMMENT("call_stub_return_address:");
|
|
298 |
return_address = __ pc();
|
|
299 |
|
|
300 |
// store result depending on type (everything that is not
|
|
301 |
// T_OBJECT, T_LONG, T_FLOAT or T_DOUBLE is treated as T_INT)
|
|
302 |
__ movq(c_rarg0, result);
|
|
303 |
Label is_long, is_float, is_double, exit;
|
|
304 |
__ movl(c_rarg1, result_type);
|
|
305 |
__ cmpl(c_rarg1, T_OBJECT);
|
|
306 |
__ jcc(Assembler::equal, is_long);
|
|
307 |
__ cmpl(c_rarg1, T_LONG);
|
|
308 |
__ jcc(Assembler::equal, is_long);
|
|
309 |
__ cmpl(c_rarg1, T_FLOAT);
|
|
310 |
__ jcc(Assembler::equal, is_float);
|
|
311 |
__ cmpl(c_rarg1, T_DOUBLE);
|
|
312 |
__ jcc(Assembler::equal, is_double);
|
|
313 |
|
|
314 |
// handle T_INT case
|
|
315 |
__ movl(Address(c_rarg0, 0), rax);
|
|
316 |
|
|
317 |
__ BIND(exit);
|
|
318 |
|
|
319 |
// pop parameters
|
|
320 |
__ leaq(rsp, rsp_after_call);
|
|
321 |
|
|
322 |
#ifdef ASSERT
|
|
323 |
// verify that threads correspond
|
|
324 |
{
|
|
325 |
Label L, S;
|
|
326 |
__ cmpq(r15_thread, thread);
|
|
327 |
__ jcc(Assembler::notEqual, S);
|
|
328 |
__ get_thread(rbx);
|
|
329 |
__ cmpq(r15_thread, rbx);
|
|
330 |
__ jcc(Assembler::equal, L);
|
|
331 |
__ bind(S);
|
|
332 |
__ jcc(Assembler::equal, L);
|
|
333 |
__ stop("StubRoutines::call_stub: threads must correspond");
|
|
334 |
__ bind(L);
|
|
335 |
}
|
|
336 |
#endif
|
|
337 |
|
|
338 |
// restore regs belonging to calling function
|
|
339 |
__ movq(r15, r15_save);
|
|
340 |
__ movq(r14, r14_save);
|
|
341 |
__ movq(r13, r13_save);
|
|
342 |
__ movq(r12, r12_save);
|
|
343 |
__ movq(rbx, rbx_save);
|
|
344 |
|
|
345 |
#ifdef _WIN64
|
|
346 |
__ movq(rdi, rdi_save);
|
|
347 |
__ movq(rsi, rsi_save);
|
|
348 |
#else
|
|
349 |
__ ldmxcsr(mxcsr_save);
|
|
350 |
#endif
|
|
351 |
|
|
352 |
// restore rsp
|
|
353 |
__ addq(rsp, -rsp_after_call_off * wordSize);
|
|
354 |
|
|
355 |
// return
|
|
356 |
__ popq(rbp);
|
|
357 |
__ ret(0);
|
|
358 |
|
|
359 |
// handle return types different from T_INT
|
|
360 |
__ BIND(is_long);
|
|
361 |
__ movq(Address(c_rarg0, 0), rax);
|
|
362 |
__ jmp(exit);
|
|
363 |
|
|
364 |
__ BIND(is_float);
|
|
365 |
__ movflt(Address(c_rarg0, 0), xmm0);
|
|
366 |
__ jmp(exit);
|
|
367 |
|
|
368 |
__ BIND(is_double);
|
|
369 |
__ movdbl(Address(c_rarg0, 0), xmm0);
|
|
370 |
__ jmp(exit);
|
|
371 |
|
|
372 |
return start;
|
|
373 |
}
|
|
374 |
|
|
375 |
// Return point for a Java call if there's an exception thrown in
|
|
376 |
// Java code. The exception is caught and transformed into a
|
|
377 |
// pending exception stored in JavaThread that can be tested from
|
|
378 |
// within the VM.
|
|
379 |
//
|
|
380 |
// Note: Usually the parameters are removed by the callee. In case
|
|
381 |
// of an exception crossing an activation frame boundary, that is
|
|
382 |
// not the case if the callee is compiled code => need to setup the
|
|
383 |
// rsp.
|
|
384 |
//
|
|
385 |
// rax: exception oop
|
|
386 |
|
|
387 |
address generate_catch_exception() {
|
|
388 |
StubCodeMark mark(this, "StubRoutines", "catch_exception");
|
|
389 |
address start = __ pc();
|
|
390 |
|
|
391 |
// same as in generate_call_stub():
|
|
392 |
const Address rsp_after_call(rbp, rsp_after_call_off * wordSize);
|
|
393 |
const Address thread (rbp, thread_off * wordSize);
|
|
394 |
|
|
395 |
#ifdef ASSERT
|
|
396 |
// verify that threads correspond
|
|
397 |
{
|
|
398 |
Label L, S;
|
|
399 |
__ cmpq(r15_thread, thread);
|
|
400 |
__ jcc(Assembler::notEqual, S);
|
|
401 |
__ get_thread(rbx);
|
|
402 |
__ cmpq(r15_thread, rbx);
|
|
403 |
__ jcc(Assembler::equal, L);
|
|
404 |
__ bind(S);
|
|
405 |
__ stop("StubRoutines::catch_exception: threads must correspond");
|
|
406 |
__ bind(L);
|
|
407 |
}
|
|
408 |
#endif
|
|
409 |
|
|
410 |
// set pending exception
|
|
411 |
__ verify_oop(rax);
|
|
412 |
|
|
413 |
__ movq(Address(r15_thread, Thread::pending_exception_offset()), rax);
|
|
414 |
__ lea(rscratch1, ExternalAddress((address)__FILE__));
|
|
415 |
__ movq(Address(r15_thread, Thread::exception_file_offset()), rscratch1);
|
|
416 |
__ movl(Address(r15_thread, Thread::exception_line_offset()), (int) __LINE__);
|
|
417 |
|
|
418 |
// complete return to VM
|
|
419 |
assert(StubRoutines::_call_stub_return_address != NULL,
|
|
420 |
"_call_stub_return_address must have been generated before");
|
|
421 |
__ jump(RuntimeAddress(StubRoutines::_call_stub_return_address));
|
|
422 |
|
|
423 |
return start;
|
|
424 |
}
|
|
425 |
|
|
426 |
// Continuation point for runtime calls returning with a pending
|
|
427 |
// exception. The pending exception check happened in the runtime
|
|
428 |
// or native call stub. The pending exception in Thread is
|
|
429 |
// converted into a Java-level exception.
|
|
430 |
//
|
|
431 |
// Contract with Java-level exception handlers:
|
|
432 |
// rax: exception
|
|
433 |
// rdx: throwing pc
|
|
434 |
//
|
|
435 |
// NOTE: At entry of this stub, exception-pc must be on stack !!
|
|
436 |
|
|
437 |
address generate_forward_exception() {
|
|
438 |
StubCodeMark mark(this, "StubRoutines", "forward exception");
|
|
439 |
address start = __ pc();
|
|
440 |
|
|
441 |
// Upon entry, the sp points to the return address returning into
|
|
442 |
// Java (interpreted or compiled) code; i.e., the return address
|
|
443 |
// becomes the throwing pc.
|
|
444 |
//
|
|
445 |
// Arguments pushed before the runtime call are still on the stack
|
|
446 |
// but the exception handler will reset the stack pointer ->
|
|
447 |
// ignore them. A potential result in registers can be ignored as
|
|
448 |
// well.
|
|
449 |
|
|
450 |
#ifdef ASSERT
|
|
451 |
// make sure this code is only executed if there is a pending exception
|
|
452 |
{
|
|
453 |
Label L;
|
|
454 |
__ cmpq(Address(r15_thread, Thread::pending_exception_offset()), (int) NULL);
|
|
455 |
__ jcc(Assembler::notEqual, L);
|
|
456 |
__ stop("StubRoutines::forward exception: no pending exception (1)");
|
|
457 |
__ bind(L);
|
|
458 |
}
|
|
459 |
#endif
|
|
460 |
|
|
461 |
// compute exception handler into rbx
|
|
462 |
__ movq(c_rarg0, Address(rsp, 0));
|
|
463 |
BLOCK_COMMENT("call exception_handler_for_return_address");
|
|
464 |
__ call_VM_leaf(CAST_FROM_FN_PTR(address,
|
|
465 |
SharedRuntime::exception_handler_for_return_address),
|
|
466 |
c_rarg0);
|
|
467 |
__ movq(rbx, rax);
|
|
468 |
|
|
469 |
// setup rax & rdx, remove return address & clear pending exception
|
|
470 |
__ popq(rdx);
|
|
471 |
__ movq(rax, Address(r15_thread, Thread::pending_exception_offset()));
|
|
472 |
__ movptr(Address(r15_thread, Thread::pending_exception_offset()), (int)NULL_WORD);
|
|
473 |
|
|
474 |
#ifdef ASSERT
|
|
475 |
// make sure exception is set
|
|
476 |
{
|
|
477 |
Label L;
|
|
478 |
__ testq(rax, rax);
|
|
479 |
__ jcc(Assembler::notEqual, L);
|
|
480 |
__ stop("StubRoutines::forward exception: no pending exception (2)");
|
|
481 |
__ bind(L);
|
|
482 |
}
|
|
483 |
#endif
|
|
484 |
|
|
485 |
// continue at exception handler (return address removed)
|
|
486 |
// rax: exception
|
|
487 |
// rbx: exception handler
|
|
488 |
// rdx: throwing pc
|
|
489 |
__ verify_oop(rax);
|
|
490 |
__ jmp(rbx);
|
|
491 |
|
|
492 |
return start;
|
|
493 |
}
|
|
494 |
|
|
495 |
// Support for jint atomic::xchg(jint exchange_value, volatile jint* dest)
|
|
496 |
//
|
|
497 |
// Arguments :
|
|
498 |
// c_rarg0: exchange_value
|
|
499 |
// c_rarg0: dest
|
|
500 |
//
|
|
501 |
// Result:
|
|
502 |
// *dest <- ex, return (orig *dest)
|
|
503 |
address generate_atomic_xchg() {
|
|
504 |
StubCodeMark mark(this, "StubRoutines", "atomic_xchg");
|
|
505 |
address start = __ pc();
|
|
506 |
|
|
507 |
__ movl(rax, c_rarg0); // Copy to eax we need a return value anyhow
|
|
508 |
__ xchgl(rax, Address(c_rarg1, 0)); // automatic LOCK
|
|
509 |
__ ret(0);
|
|
510 |
|
|
511 |
return start;
|
|
512 |
}
|
|
513 |
|
|
514 |
// Support for intptr_t atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest)
|
|
515 |
//
|
|
516 |
// Arguments :
|
|
517 |
// c_rarg0: exchange_value
|
|
518 |
// c_rarg1: dest
|
|
519 |
//
|
|
520 |
// Result:
|
|
521 |
// *dest <- ex, return (orig *dest)
|
|
522 |
address generate_atomic_xchg_ptr() {
|
|
523 |
StubCodeMark mark(this, "StubRoutines", "atomic_xchg_ptr");
|
|
524 |
address start = __ pc();
|
|
525 |
|
|
526 |
__ movq(rax, c_rarg0); // Copy to eax we need a return value anyhow
|
|
527 |
__ xchgq(rax, Address(c_rarg1, 0)); // automatic LOCK
|
|
528 |
__ ret(0);
|
|
529 |
|
|
530 |
return start;
|
|
531 |
}
|
|
532 |
|
|
533 |
// Support for jint atomic::atomic_cmpxchg(jint exchange_value, volatile jint* dest,
|
|
534 |
// jint compare_value)
|
|
535 |
//
|
|
536 |
// Arguments :
|
|
537 |
// c_rarg0: exchange_value
|
|
538 |
// c_rarg1: dest
|
|
539 |
// c_rarg2: compare_value
|
|
540 |
//
|
|
541 |
// Result:
|
|
542 |
// if ( compare_value == *dest ) {
|
|
543 |
// *dest = exchange_value
|
|
544 |
// return compare_value;
|
|
545 |
// else
|
|
546 |
// return *dest;
|
|
547 |
address generate_atomic_cmpxchg() {
|
|
548 |
StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg");
|
|
549 |
address start = __ pc();
|
|
550 |
|
|
551 |
__ movl(rax, c_rarg2);
|
|
552 |
if ( os::is_MP() ) __ lock();
|
|
553 |
__ cmpxchgl(c_rarg0, Address(c_rarg1, 0));
|
|
554 |
__ ret(0);
|
|
555 |
|
|
556 |
return start;
|
|
557 |
}
|
|
558 |
|
|
559 |
// Support for jint atomic::atomic_cmpxchg_long(jlong exchange_value,
|
|
560 |
// volatile jlong* dest,
|
|
561 |
// jlong compare_value)
|
|
562 |
// Arguments :
|
|
563 |
// c_rarg0: exchange_value
|
|
564 |
// c_rarg1: dest
|
|
565 |
// c_rarg2: compare_value
|
|
566 |
//
|
|
567 |
// Result:
|
|
568 |
// if ( compare_value == *dest ) {
|
|
569 |
// *dest = exchange_value
|
|
570 |
// return compare_value;
|
|
571 |
// else
|
|
572 |
// return *dest;
|
|
573 |
address generate_atomic_cmpxchg_long() {
|
|
574 |
StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg_long");
|
|
575 |
address start = __ pc();
|
|
576 |
|
|
577 |
__ movq(rax, c_rarg2);
|
|
578 |
if ( os::is_MP() ) __ lock();
|
|
579 |
__ cmpxchgq(c_rarg0, Address(c_rarg1, 0));
|
|
580 |
__ ret(0);
|
|
581 |
|
|
582 |
return start;
|
|
583 |
}
|
|
584 |
|
|
585 |
// Support for jint atomic::add(jint add_value, volatile jint* dest)
|
|
586 |
//
|
|
587 |
// Arguments :
|
|
588 |
// c_rarg0: add_value
|
|
589 |
// c_rarg1: dest
|
|
590 |
//
|
|
591 |
// Result:
|
|
592 |
// *dest += add_value
|
|
593 |
// return *dest;
|
|
594 |
address generate_atomic_add() {
|
|
595 |
StubCodeMark mark(this, "StubRoutines", "atomic_add");
|
|
596 |
address start = __ pc();
|
|
597 |
|
|
598 |
__ movl(rax, c_rarg0);
|
|
599 |
if ( os::is_MP() ) __ lock();
|
|
600 |
__ xaddl(Address(c_rarg1, 0), c_rarg0);
|
|
601 |
__ addl(rax, c_rarg0);
|
|
602 |
__ ret(0);
|
|
603 |
|
|
604 |
return start;
|
|
605 |
}
|
|
606 |
|
|
607 |
// Support for intptr_t atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest)
|
|
608 |
//
|
|
609 |
// Arguments :
|
|
610 |
// c_rarg0: add_value
|
|
611 |
// c_rarg1: dest
|
|
612 |
//
|
|
613 |
// Result:
|
|
614 |
// *dest += add_value
|
|
615 |
// return *dest;
|
|
616 |
address generate_atomic_add_ptr() {
|
|
617 |
StubCodeMark mark(this, "StubRoutines", "atomic_add_ptr");
|
|
618 |
address start = __ pc();
|
|
619 |
|
|
620 |
__ movq(rax, c_rarg0); // Copy to eax we need a return value anyhow
|
|
621 |
if ( os::is_MP() ) __ lock();
|
|
622 |
__ xaddl(Address(c_rarg1, 0), c_rarg0);
|
|
623 |
__ addl(rax, c_rarg0);
|
|
624 |
__ ret(0);
|
|
625 |
|
|
626 |
return start;
|
|
627 |
}
|
|
628 |
|
|
629 |
// Support for intptr_t OrderAccess::fence()
|
|
630 |
//
|
|
631 |
// Arguments :
|
|
632 |
//
|
|
633 |
// Result:
|
|
634 |
address generate_orderaccess_fence() {
|
|
635 |
StubCodeMark mark(this, "StubRoutines", "orderaccess_fence");
|
|
636 |
address start = __ pc();
|
|
637 |
__ mfence();
|
|
638 |
__ ret(0);
|
|
639 |
|
|
640 |
return start;
|
|
641 |
}
|
|
642 |
|
|
643 |
// Support for intptr_t get_previous_fp()
|
|
644 |
//
|
|
645 |
// This routine is used to find the previous frame pointer for the
|
|
646 |
// caller (current_frame_guess). This is used as part of debugging
|
|
647 |
// ps() is seemingly lost trying to find frames.
|
|
648 |
// This code assumes that caller current_frame_guess) has a frame.
|
|
649 |
address generate_get_previous_fp() {
|
|
650 |
StubCodeMark mark(this, "StubRoutines", "get_previous_fp");
|
|
651 |
const Address old_fp(rbp, 0);
|
|
652 |
const Address older_fp(rax, 0);
|
|
653 |
address start = __ pc();
|
|
654 |
|
|
655 |
__ enter();
|
|
656 |
__ movq(rax, old_fp); // callers fp
|
|
657 |
__ movq(rax, older_fp); // the frame for ps()
|
|
658 |
__ popq(rbp);
|
|
659 |
__ ret(0);
|
|
660 |
|
|
661 |
return start;
|
|
662 |
}
|
|
663 |
|
|
664 |
//----------------------------------------------------------------------------------------------------
|
|
665 |
// Support for void verify_mxcsr()
|
|
666 |
//
|
|
667 |
// This routine is used with -Xcheck:jni to verify that native
|
|
668 |
// JNI code does not return to Java code without restoring the
|
|
669 |
// MXCSR register to our expected state.
|
|
670 |
|
|
671 |
address generate_verify_mxcsr() {
|
|
672 |
StubCodeMark mark(this, "StubRoutines", "verify_mxcsr");
|
|
673 |
address start = __ pc();
|
|
674 |
|
|
675 |
const Address mxcsr_save(rsp, 0);
|
|
676 |
|
|
677 |
if (CheckJNICalls) {
|
|
678 |
Label ok_ret;
|
|
679 |
__ pushq(rax);
|
|
680 |
__ subq(rsp, wordSize); // allocate a temp location
|
|
681 |
__ stmxcsr(mxcsr_save);
|
|
682 |
__ movl(rax, mxcsr_save);
|
|
683 |
__ andl(rax, MXCSR_MASK); // Only check control and mask bits
|
|
684 |
__ cmpl(rax, *(int *)(StubRoutines::amd64::mxcsr_std()));
|
|
685 |
__ jcc(Assembler::equal, ok_ret);
|
|
686 |
|
|
687 |
__ warn("MXCSR changed by native JNI code, use -XX:+RestoreMXCSROnJNICall");
|
|
688 |
|
|
689 |
__ ldmxcsr(ExternalAddress(StubRoutines::amd64::mxcsr_std()));
|
|
690 |
|
|
691 |
__ bind(ok_ret);
|
|
692 |
__ addq(rsp, wordSize);
|
|
693 |
__ popq(rax);
|
|
694 |
}
|
|
695 |
|
|
696 |
__ ret(0);
|
|
697 |
|
|
698 |
return start;
|
|
699 |
}
|
|
700 |
|
|
701 |
address generate_f2i_fixup() {
|
|
702 |
StubCodeMark mark(this, "StubRoutines", "f2i_fixup");
|
|
703 |
Address inout(rsp, 5 * wordSize); // return address + 4 saves
|
|
704 |
|
|
705 |
address start = __ pc();
|
|
706 |
|
|
707 |
Label L;
|
|
708 |
|
|
709 |
__ pushq(rax);
|
|
710 |
__ pushq(c_rarg3);
|
|
711 |
__ pushq(c_rarg2);
|
|
712 |
__ pushq(c_rarg1);
|
|
713 |
|
|
714 |
__ movl(rax, 0x7f800000);
|
|
715 |
__ xorl(c_rarg3, c_rarg3);
|
|
716 |
__ movl(c_rarg2, inout);
|
|
717 |
__ movl(c_rarg1, c_rarg2);
|
|
718 |
__ andl(c_rarg1, 0x7fffffff);
|
|
719 |
__ cmpl(rax, c_rarg1); // NaN? -> 0
|
|
720 |
__ jcc(Assembler::negative, L);
|
|
721 |
__ testl(c_rarg2, c_rarg2); // signed ? min_jint : max_jint
|
|
722 |
__ movl(c_rarg3, 0x80000000);
|
|
723 |
__ movl(rax, 0x7fffffff);
|
|
724 |
__ cmovl(Assembler::positive, c_rarg3, rax);
|
|
725 |
|
|
726 |
__ bind(L);
|
|
727 |
__ movq(inout, c_rarg3);
|
|
728 |
|
|
729 |
__ popq(c_rarg1);
|
|
730 |
__ popq(c_rarg2);
|
|
731 |
__ popq(c_rarg3);
|
|
732 |
__ popq(rax);
|
|
733 |
|
|
734 |
__ ret(0);
|
|
735 |
|
|
736 |
return start;
|
|
737 |
}
|
|
738 |
|
|
739 |
address generate_f2l_fixup() {
|
|
740 |
StubCodeMark mark(this, "StubRoutines", "f2l_fixup");
|
|
741 |
Address inout(rsp, 5 * wordSize); // return address + 4 saves
|
|
742 |
address start = __ pc();
|
|
743 |
|
|
744 |
Label L;
|
|
745 |
|
|
746 |
__ pushq(rax);
|
|
747 |
__ pushq(c_rarg3);
|
|
748 |
__ pushq(c_rarg2);
|
|
749 |
__ pushq(c_rarg1);
|
|
750 |
|
|
751 |
__ movl(rax, 0x7f800000);
|
|
752 |
__ xorl(c_rarg3, c_rarg3);
|
|
753 |
__ movl(c_rarg2, inout);
|
|
754 |
__ movl(c_rarg1, c_rarg2);
|
|
755 |
__ andl(c_rarg1, 0x7fffffff);
|
|
756 |
__ cmpl(rax, c_rarg1); // NaN? -> 0
|
|
757 |
__ jcc(Assembler::negative, L);
|
|
758 |
__ testl(c_rarg2, c_rarg2); // signed ? min_jlong : max_jlong
|
|
759 |
__ mov64(c_rarg3, 0x8000000000000000);
|
|
760 |
__ mov64(rax, 0x7fffffffffffffff);
|
|
761 |
__ cmovq(Assembler::positive, c_rarg3, rax);
|
|
762 |
|
|
763 |
__ bind(L);
|
|
764 |
__ movq(inout, c_rarg3);
|
|
765 |
|
|
766 |
__ popq(c_rarg1);
|
|
767 |
__ popq(c_rarg2);
|
|
768 |
__ popq(c_rarg3);
|
|
769 |
__ popq(rax);
|
|
770 |
|
|
771 |
__ ret(0);
|
|
772 |
|
|
773 |
return start;
|
|
774 |
}
|
|
775 |
|
|
776 |
address generate_d2i_fixup() {
|
|
777 |
StubCodeMark mark(this, "StubRoutines", "d2i_fixup");
|
|
778 |
Address inout(rsp, 6 * wordSize); // return address + 5 saves
|
|
779 |
|
|
780 |
address start = __ pc();
|
|
781 |
|
|
782 |
Label L;
|
|
783 |
|
|
784 |
__ pushq(rax);
|
|
785 |
__ pushq(c_rarg3);
|
|
786 |
__ pushq(c_rarg2);
|
|
787 |
__ pushq(c_rarg1);
|
|
788 |
__ pushq(c_rarg0);
|
|
789 |
|
|
790 |
__ movl(rax, 0x7ff00000);
|
|
791 |
__ movq(c_rarg2, inout);
|
|
792 |
__ movl(c_rarg3, c_rarg2);
|
|
793 |
__ movq(c_rarg1, c_rarg2);
|
|
794 |
__ movq(c_rarg0, c_rarg2);
|
|
795 |
__ negl(c_rarg3);
|
|
796 |
__ shrq(c_rarg1, 0x20);
|
|
797 |
__ orl(c_rarg3, c_rarg2);
|
|
798 |
__ andl(c_rarg1, 0x7fffffff);
|
|
799 |
__ xorl(c_rarg2, c_rarg2);
|
|
800 |
__ shrl(c_rarg3, 0x1f);
|
|
801 |
__ orl(c_rarg1, c_rarg3);
|
|
802 |
__ cmpl(rax, c_rarg1);
|
|
803 |
__ jcc(Assembler::negative, L); // NaN -> 0
|
|
804 |
__ testq(c_rarg0, c_rarg0); // signed ? min_jint : max_jint
|
|
805 |
__ movl(c_rarg2, 0x80000000);
|
|
806 |
__ movl(rax, 0x7fffffff);
|
|
807 |
__ cmovl(Assembler::positive, c_rarg2, rax);
|
|
808 |
|
|
809 |
__ bind(L);
|
|
810 |
__ movq(inout, c_rarg2);
|
|
811 |
|
|
812 |
__ popq(c_rarg0);
|
|
813 |
__ popq(c_rarg1);
|
|
814 |
__ popq(c_rarg2);
|
|
815 |
__ popq(c_rarg3);
|
|
816 |
__ popq(rax);
|
|
817 |
|
|
818 |
__ ret(0);
|
|
819 |
|
|
820 |
return start;
|
|
821 |
}
|
|
822 |
|
|
823 |
address generate_d2l_fixup() {
|
|
824 |
StubCodeMark mark(this, "StubRoutines", "d2l_fixup");
|
|
825 |
Address inout(rsp, 6 * wordSize); // return address + 5 saves
|
|
826 |
|
|
827 |
address start = __ pc();
|
|
828 |
|
|
829 |
Label L;
|
|
830 |
|
|
831 |
__ pushq(rax);
|
|
832 |
__ pushq(c_rarg3);
|
|
833 |
__ pushq(c_rarg2);
|
|
834 |
__ pushq(c_rarg1);
|
|
835 |
__ pushq(c_rarg0);
|
|
836 |
|
|
837 |
__ movl(rax, 0x7ff00000);
|
|
838 |
__ movq(c_rarg2, inout);
|
|
839 |
__ movl(c_rarg3, c_rarg2);
|
|
840 |
__ movq(c_rarg1, c_rarg2);
|
|
841 |
__ movq(c_rarg0, c_rarg2);
|
|
842 |
__ negl(c_rarg3);
|
|
843 |
__ shrq(c_rarg1, 0x20);
|
|
844 |
__ orl(c_rarg3, c_rarg2);
|
|
845 |
__ andl(c_rarg1, 0x7fffffff);
|
|
846 |
__ xorl(c_rarg2, c_rarg2);
|
|
847 |
__ shrl(c_rarg3, 0x1f);
|
|
848 |
__ orl(c_rarg1, c_rarg3);
|
|
849 |
__ cmpl(rax, c_rarg1);
|
|
850 |
__ jcc(Assembler::negative, L); // NaN -> 0
|
|
851 |
__ testq(c_rarg0, c_rarg0); // signed ? min_jlong : max_jlong
|
|
852 |
__ mov64(c_rarg2, 0x8000000000000000);
|
|
853 |
__ mov64(rax, 0x7fffffffffffffff);
|
|
854 |
__ cmovq(Assembler::positive, c_rarg2, rax);
|
|
855 |
|
|
856 |
__ bind(L);
|
|
857 |
__ movq(inout, c_rarg2);
|
|
858 |
|
|
859 |
__ popq(c_rarg0);
|
|
860 |
__ popq(c_rarg1);
|
|
861 |
__ popq(c_rarg2);
|
|
862 |
__ popq(c_rarg3);
|
|
863 |
__ popq(rax);
|
|
864 |
|
|
865 |
__ ret(0);
|
|
866 |
|
|
867 |
return start;
|
|
868 |
}
|
|
869 |
|
|
870 |
address generate_fp_mask(const char *stub_name, int64_t mask) {
|
|
871 |
StubCodeMark mark(this, "StubRoutines", stub_name);
|
|
872 |
|
|
873 |
__ align(16);
|
|
874 |
address start = __ pc();
|
|
875 |
|
|
876 |
__ emit_data64( mask, relocInfo::none );
|
|
877 |
__ emit_data64( mask, relocInfo::none );
|
|
878 |
|
|
879 |
return start;
|
|
880 |
}
|
|
881 |
|
|
882 |
// The following routine generates a subroutine to throw an
|
|
883 |
// asynchronous UnknownError when an unsafe access gets a fault that
|
|
884 |
// could not be reasonably prevented by the programmer. (Example:
|
|
885 |
// SIGBUS/OBJERR.)
|
|
886 |
address generate_handler_for_unsafe_access() {
|
|
887 |
StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access");
|
|
888 |
address start = __ pc();
|
|
889 |
|
|
890 |
__ pushq(0); // hole for return address-to-be
|
|
891 |
__ pushaq(); // push registers
|
|
892 |
Address next_pc(rsp, RegisterImpl::number_of_registers * BytesPerWord);
|
|
893 |
|
|
894 |
__ subq(rsp, frame::arg_reg_save_area_bytes);
|
|
895 |
BLOCK_COMMENT("call handle_unsafe_access");
|
|
896 |
__ call(RuntimeAddress(CAST_FROM_FN_PTR(address, handle_unsafe_access)));
|
|
897 |
__ addq(rsp, frame::arg_reg_save_area_bytes);
|
|
898 |
|
|
899 |
__ movq(next_pc, rax); // stuff next address
|
|
900 |
__ popaq();
|
|
901 |
__ ret(0); // jump to next address
|
|
902 |
|
|
903 |
return start;
|
|
904 |
}
|
|
905 |
|
|
906 |
// Non-destructive plausibility checks for oops
|
|
907 |
//
|
|
908 |
// Arguments:
|
|
909 |
// all args on stack!
|
|
910 |
//
|
|
911 |
// Stack after saving c_rarg3:
|
|
912 |
// [tos + 0]: saved c_rarg3
|
|
913 |
// [tos + 1]: saved c_rarg2
|
|
914 |
// [tos + 2]: saved flags
|
|
915 |
// [tos + 3]: return address
|
|
916 |
// * [tos + 4]: error message (char*)
|
|
917 |
// * [tos + 5]: object to verify (oop)
|
|
918 |
// * [tos + 6]: saved rax - saved by caller and bashed
|
|
919 |
// * = popped on exit
|
|
920 |
address generate_verify_oop() {
|
|
921 |
StubCodeMark mark(this, "StubRoutines", "verify_oop");
|
|
922 |
address start = __ pc();
|
|
923 |
|
|
924 |
Label exit, error;
|
|
925 |
|
|
926 |
__ pushfq();
|
|
927 |
__ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr()));
|
|
928 |
|
|
929 |
// save c_rarg2 and c_rarg3
|
|
930 |
__ pushq(c_rarg2);
|
|
931 |
__ pushq(c_rarg3);
|
|
932 |
|
|
933 |
// get object
|
|
934 |
__ movq(rax, Address(rsp, 5 * wordSize));
|
|
935 |
|
|
936 |
// make sure object is 'reasonable'
|
|
937 |
__ testq(rax, rax);
|
|
938 |
__ jcc(Assembler::zero, exit); // if obj is NULL it is OK
|
|
939 |
// Check if the oop is in the right area of memory
|
|
940 |
__ movq(c_rarg2, rax);
|
|
941 |
__ movptr(c_rarg3, (int64_t) Universe::verify_oop_mask());
|
|
942 |
__ andq(c_rarg2, c_rarg3);
|
|
943 |
__ movptr(c_rarg3, (int64_t) Universe::verify_oop_bits());
|
|
944 |
__ cmpq(c_rarg2, c_rarg3);
|
|
945 |
__ jcc(Assembler::notZero, error);
|
|
946 |
|
|
947 |
// make sure klass is 'reasonable'
|
|
948 |
__ movq(rax, Address(rax, oopDesc::klass_offset_in_bytes())); // get klass
|
|
949 |
__ testq(rax, rax);
|
|
950 |
__ jcc(Assembler::zero, error); // if klass is NULL it is broken
|
|
951 |
// Check if the klass is in the right area of memory
|
|
952 |
__ movq(c_rarg2, rax);
|
|
953 |
__ movptr(c_rarg3, (int64_t) Universe::verify_klass_mask());
|
|
954 |
__ andq(c_rarg2, c_rarg3);
|
|
955 |
__ movptr(c_rarg3, (int64_t) Universe::verify_klass_bits());
|
|
956 |
__ cmpq(c_rarg2, c_rarg3);
|
|
957 |
__ jcc(Assembler::notZero, error);
|
|
958 |
|
|
959 |
// make sure klass' klass is 'reasonable'
|
|
960 |
__ movq(rax, Address(rax, oopDesc::klass_offset_in_bytes()));
|
|
961 |
__ testq(rax, rax);
|
|
962 |
__ jcc(Assembler::zero, error); // if klass' klass is NULL it is broken
|
|
963 |
// Check if the klass' klass is in the right area of memory
|
|
964 |
__ movptr(c_rarg3, (int64_t) Universe::verify_klass_mask());
|
|
965 |
__ andq(rax, c_rarg3);
|
|
966 |
__ movptr(c_rarg3, (int64_t) Universe::verify_klass_bits());
|
|
967 |
__ cmpq(rax, c_rarg3);
|
|
968 |
__ jcc(Assembler::notZero, error);
|
|
969 |
|
|
970 |
// return if everything seems ok
|
|
971 |
__ bind(exit);
|
|
972 |
__ movq(rax, Address(rsp, 6 * wordSize)); // get saved rax back
|
|
973 |
__ popq(c_rarg3); // restore c_rarg3
|
|
974 |
__ popq(c_rarg2); // restore c_rarg2
|
|
975 |
__ popfq(); // restore flags
|
|
976 |
__ ret(3 * wordSize); // pop caller saved stuff
|
|
977 |
|
|
978 |
// handle errors
|
|
979 |
__ bind(error);
|
|
980 |
__ movq(rax, Address(rsp, 6 * wordSize)); // get saved rax back
|
|
981 |
__ popq(c_rarg3); // get saved c_rarg3 back
|
|
982 |
__ popq(c_rarg2); // get saved c_rarg2 back
|
|
983 |
__ popfq(); // get saved flags off stack --
|
|
984 |
// will be ignored
|
|
985 |
|
|
986 |
__ pushaq(); // push registers
|
|
987 |
// (rip is already
|
|
988 |
// already pushed)
|
|
989 |
// debug(char* msg, int64_t regs[])
|
|
990 |
// We've popped the registers we'd saved (c_rarg3, c_rarg2 and flags), and
|
|
991 |
// pushed all the registers, so now the stack looks like:
|
|
992 |
// [tos + 0] 16 saved registers
|
|
993 |
// [tos + 16] return address
|
|
994 |
// [tos + 17] error message (char*)
|
|
995 |
|
|
996 |
__ movq(c_rarg0, Address(rsp, 17 * wordSize)); // pass address of error message
|
|
997 |
__ movq(c_rarg1, rsp); // pass address of regs on stack
|
|
998 |
__ movq(r12, rsp); // remember rsp
|
|
999 |
__ subq(rsp, frame::arg_reg_save_area_bytes);// windows
|
|
1000 |
__ andq(rsp, -16); // align stack as required by ABI
|
|
1001 |
BLOCK_COMMENT("call MacroAssembler::debug");
|
|
1002 |
__ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug)));
|
|
1003 |
__ movq(rsp, r12); // restore rsp
|
|
1004 |
__ popaq(); // pop registers
|
|
1005 |
__ ret(3 * wordSize); // pop caller saved stuff
|
|
1006 |
|
|
1007 |
return start;
|
|
1008 |
}
|
|
1009 |
|
|
1010 |
static address disjoint_byte_copy_entry;
|
|
1011 |
static address disjoint_short_copy_entry;
|
|
1012 |
static address disjoint_int_copy_entry;
|
|
1013 |
static address disjoint_long_copy_entry;
|
|
1014 |
static address disjoint_oop_copy_entry;
|
|
1015 |
|
|
1016 |
static address byte_copy_entry;
|
|
1017 |
static address short_copy_entry;
|
|
1018 |
static address int_copy_entry;
|
|
1019 |
static address long_copy_entry;
|
|
1020 |
static address oop_copy_entry;
|
|
1021 |
|
|
1022 |
static address checkcast_copy_entry;
|
|
1023 |
|
|
1024 |
//
|
|
1025 |
// Verify that a register contains clean 32-bits positive value
|
|
1026 |
// (high 32-bits are 0) so it could be used in 64-bits shifts.
|
|
1027 |
//
|
|
1028 |
// Input:
|
|
1029 |
// Rint - 32-bits value
|
|
1030 |
// Rtmp - scratch
|
|
1031 |
//
|
|
1032 |
void assert_clean_int(Register Rint, Register Rtmp) {
|
|
1033 |
#ifdef ASSERT
|
|
1034 |
Label L;
|
|
1035 |
assert_different_registers(Rtmp, Rint);
|
|
1036 |
__ movslq(Rtmp, Rint);
|
|
1037 |
__ cmpq(Rtmp, Rint);
|
|
1038 |
__ jccb(Assembler::equal, L);
|
|
1039 |
__ stop("high 32-bits of int value are not 0");
|
|
1040 |
__ bind(L);
|
|
1041 |
#endif
|
|
1042 |
}
|
|
1043 |
|
|
1044 |
// Generate overlap test for array copy stubs
|
|
1045 |
//
|
|
1046 |
// Input:
|
|
1047 |
// c_rarg0 - from
|
|
1048 |
// c_rarg1 - to
|
|
1049 |
// c_rarg2 - element count
|
|
1050 |
//
|
|
1051 |
// Output:
|
|
1052 |
// rax - &from[element count - 1]
|
|
1053 |
//
|
|
1054 |
void array_overlap_test(address no_overlap_target, Address::ScaleFactor sf) {
|
|
1055 |
assert(no_overlap_target != NULL, "must be generated");
|
|
1056 |
array_overlap_test(no_overlap_target, NULL, sf);
|
|
1057 |
}
|
|
1058 |
void array_overlap_test(Label& L_no_overlap, Address::ScaleFactor sf) {
|
|
1059 |
array_overlap_test(NULL, &L_no_overlap, sf);
|
|
1060 |
}
|
|
1061 |
void array_overlap_test(address no_overlap_target, Label* NOLp, Address::ScaleFactor sf) {
|
|
1062 |
const Register from = c_rarg0;
|
|
1063 |
const Register to = c_rarg1;
|
|
1064 |
const Register count = c_rarg2;
|
|
1065 |
const Register end_from = rax;
|
|
1066 |
|
|
1067 |
__ cmpq(to, from);
|
|
1068 |
__ leaq(end_from, Address(from, count, sf, 0));
|
|
1069 |
if (NOLp == NULL) {
|
|
1070 |
ExternalAddress no_overlap(no_overlap_target);
|
|
1071 |
__ jump_cc(Assembler::belowEqual, no_overlap);
|
|
1072 |
__ cmpq(to, end_from);
|
|
1073 |
__ jump_cc(Assembler::aboveEqual, no_overlap);
|
|
1074 |
} else {
|
|
1075 |
__ jcc(Assembler::belowEqual, (*NOLp));
|
|
1076 |
__ cmpq(to, end_from);
|
|
1077 |
__ jcc(Assembler::aboveEqual, (*NOLp));
|
|
1078 |
}
|
|
1079 |
}
|
|
1080 |
|
|
1081 |
// Shuffle first three arg regs on Windows into Linux/Solaris locations.
|
|
1082 |
//
|
|
1083 |
// Outputs:
|
|
1084 |
// rdi - rcx
|
|
1085 |
// rsi - rdx
|
|
1086 |
// rdx - r8
|
|
1087 |
// rcx - r9
|
|
1088 |
//
|
|
1089 |
// Registers r9 and r10 are used to save rdi and rsi on Windows, which latter
|
|
1090 |
// are non-volatile. r9 and r10 should not be used by the caller.
|
|
1091 |
//
|
|
1092 |
void setup_arg_regs(int nargs = 3) {
|
|
1093 |
const Register saved_rdi = r9;
|
|
1094 |
const Register saved_rsi = r10;
|
|
1095 |
assert(nargs == 3 || nargs == 4, "else fix");
|
|
1096 |
#ifdef _WIN64
|
|
1097 |
assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9,
|
|
1098 |
"unexpected argument registers");
|
|
1099 |
if (nargs >= 4)
|
|
1100 |
__ movq(rax, r9); // r9 is also saved_rdi
|
|
1101 |
__ movq(saved_rdi, rdi);
|
|
1102 |
__ movq(saved_rsi, rsi);
|
|
1103 |
__ movq(rdi, rcx); // c_rarg0
|
|
1104 |
__ movq(rsi, rdx); // c_rarg1
|
|
1105 |
__ movq(rdx, r8); // c_rarg2
|
|
1106 |
if (nargs >= 4)
|
|
1107 |
__ movq(rcx, rax); // c_rarg3 (via rax)
|
|
1108 |
#else
|
|
1109 |
assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx,
|
|
1110 |
"unexpected argument registers");
|
|
1111 |
#endif
|
|
1112 |
}
|
|
1113 |
|
|
1114 |
void restore_arg_regs() {
|
|
1115 |
const Register saved_rdi = r9;
|
|
1116 |
const Register saved_rsi = r10;
|
|
1117 |
#ifdef _WIN64
|
|
1118 |
__ movq(rdi, saved_rdi);
|
|
1119 |
__ movq(rsi, saved_rsi);
|
|
1120 |
#endif
|
|
1121 |
}
|
|
1122 |
|
|
1123 |
// Generate code for an array write pre barrier
|
|
1124 |
//
|
|
1125 |
// addr - starting address
|
|
1126 |
// count - element count
|
|
1127 |
//
|
|
1128 |
// Destroy no registers!
|
|
1129 |
//
|
|
1130 |
void gen_write_ref_array_pre_barrier(Register addr, Register count) {
|
|
1131 |
#if 0 // G1 - only
|
|
1132 |
assert_different_registers(addr, c_rarg1);
|
|
1133 |
assert_different_registers(count, c_rarg0);
|
|
1134 |
BarrierSet* bs = Universe::heap()->barrier_set();
|
|
1135 |
switch (bs->kind()) {
|
|
1136 |
case BarrierSet::G1SATBCT:
|
|
1137 |
case BarrierSet::G1SATBCTLogging:
|
|
1138 |
{
|
|
1139 |
__ pushaq(); // push registers
|
|
1140 |
__ movq(c_rarg0, addr);
|
|
1141 |
__ movq(c_rarg1, count);
|
|
1142 |
__ call(RuntimeAddress(BarrierSet::static_write_ref_array_pre));
|
|
1143 |
__ popaq();
|
|
1144 |
}
|
|
1145 |
break;
|
|
1146 |
case BarrierSet::CardTableModRef:
|
|
1147 |
case BarrierSet::CardTableExtension:
|
|
1148 |
case BarrierSet::ModRef:
|
|
1149 |
break;
|
|
1150 |
default :
|
|
1151 |
ShouldNotReachHere();
|
|
1152 |
|
|
1153 |
}
|
|
1154 |
#endif // 0 G1 - only
|
|
1155 |
}
|
|
1156 |
|
|
1157 |
//
|
|
1158 |
// Generate code for an array write post barrier
|
|
1159 |
//
|
|
1160 |
// Input:
|
|
1161 |
// start - register containing starting address of destination array
|
|
1162 |
// end - register containing ending address of destination array
|
|
1163 |
// scratch - scratch register
|
|
1164 |
//
|
|
1165 |
// The input registers are overwritten.
|
|
1166 |
// The ending address is inclusive.
|
|
1167 |
void gen_write_ref_array_post_barrier(Register start, Register end, Register scratch) {
|
|
1168 |
assert_different_registers(start, end, scratch);
|
|
1169 |
BarrierSet* bs = Universe::heap()->barrier_set();
|
|
1170 |
switch (bs->kind()) {
|
|
1171 |
#if 0 // G1 - only
|
|
1172 |
case BarrierSet::G1SATBCT:
|
|
1173 |
case BarrierSet::G1SATBCTLogging:
|
|
1174 |
|
|
1175 |
{
|
|
1176 |
__ pushaq(); // push registers (overkill)
|
|
1177 |
// must compute element count unless barrier set interface is changed (other platforms supply count)
|
|
1178 |
assert_different_registers(start, end, scratch);
|
|
1179 |
__ leaq(scratch, Address(end, wordSize));
|
|
1180 |
__ subq(scratch, start);
|
|
1181 |
__ shrq(scratch, LogBytesPerWord);
|
|
1182 |
__ movq(c_rarg0, start);
|
|
1183 |
__ movq(c_rarg1, scratch);
|
|
1184 |
__ call(RuntimeAddress(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_post));
|
|
1185 |
__ popaq();
|
|
1186 |
}
|
|
1187 |
break;
|
|
1188 |
#endif // 0 G1 - only
|
|
1189 |
case BarrierSet::CardTableModRef:
|
|
1190 |
case BarrierSet::CardTableExtension:
|
|
1191 |
{
|
|
1192 |
CardTableModRefBS* ct = (CardTableModRefBS*)bs;
|
|
1193 |
assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code");
|
|
1194 |
|
|
1195 |
Label L_loop;
|
|
1196 |
|
|
1197 |
__ shrq(start, CardTableModRefBS::card_shift);
|
|
1198 |
__ shrq(end, CardTableModRefBS::card_shift);
|
|
1199 |
__ subq(end, start); // number of bytes to copy
|
|
1200 |
|
|
1201 |
const Register count = end; // 'end' register contains bytes count now
|
|
1202 |
__ lea(scratch, ExternalAddress((address)ct->byte_map_base));
|
|
1203 |
__ addq(start, scratch);
|
|
1204 |
__ BIND(L_loop);
|
|
1205 |
__ movb(Address(start, count, Address::times_1), 0);
|
|
1206 |
__ decrementq(count);
|
|
1207 |
__ jcc(Assembler::greaterEqual, L_loop);
|
|
1208 |
}
|
|
1209 |
}
|
|
1210 |
}
|
|
1211 |
|
|
1212 |
// Copy big chunks forward
|
|
1213 |
//
|
|
1214 |
// Inputs:
|
|
1215 |
// end_from - source arrays end address
|
|
1216 |
// end_to - destination array end address
|
|
1217 |
// qword_count - 64-bits element count, negative
|
|
1218 |
// to - scratch
|
|
1219 |
// L_copy_32_bytes - entry label
|
|
1220 |
// L_copy_8_bytes - exit label
|
|
1221 |
//
|
|
1222 |
void copy_32_bytes_forward(Register end_from, Register end_to,
|
|
1223 |
Register qword_count, Register to,
|
|
1224 |
Label& L_copy_32_bytes, Label& L_copy_8_bytes) {
|
|
1225 |
DEBUG_ONLY(__ stop("enter at entry label, not here"));
|
|
1226 |
Label L_loop;
|
|
1227 |
__ align(16);
|
|
1228 |
__ BIND(L_loop);
|
|
1229 |
__ movq(to, Address(end_from, qword_count, Address::times_8, -24));
|
|
1230 |
__ movq(Address(end_to, qword_count, Address::times_8, -24), to);
|
|
1231 |
__ movq(to, Address(end_from, qword_count, Address::times_8, -16));
|
|
1232 |
__ movq(Address(end_to, qword_count, Address::times_8, -16), to);
|
|
1233 |
__ movq(to, Address(end_from, qword_count, Address::times_8, - 8));
|
|
1234 |
__ movq(Address(end_to, qword_count, Address::times_8, - 8), to);
|
|
1235 |
__ movq(to, Address(end_from, qword_count, Address::times_8, - 0));
|
|
1236 |
__ movq(Address(end_to, qword_count, Address::times_8, - 0), to);
|
|
1237 |
__ BIND(L_copy_32_bytes);
|
|
1238 |
__ addq(qword_count, 4);
|
|
1239 |
__ jcc(Assembler::lessEqual, L_loop);
|
|
1240 |
__ subq(qword_count, 4);
|
|
1241 |
__ jcc(Assembler::less, L_copy_8_bytes); // Copy trailing qwords
|
|
1242 |
}
|
|
1243 |
|
|
1244 |
|
|
1245 |
// Copy big chunks backward
|
|
1246 |
//
|
|
1247 |
// Inputs:
|
|
1248 |
// from - source arrays address
|
|
1249 |
// dest - destination array address
|
|
1250 |
// qword_count - 64-bits element count
|
|
1251 |
// to - scratch
|
|
1252 |
// L_copy_32_bytes - entry label
|
|
1253 |
// L_copy_8_bytes - exit label
|
|
1254 |
//
|
|
1255 |
void copy_32_bytes_backward(Register from, Register dest,
|
|
1256 |
Register qword_count, Register to,
|
|
1257 |
Label& L_copy_32_bytes, Label& L_copy_8_bytes) {
|
|
1258 |
DEBUG_ONLY(__ stop("enter at entry label, not here"));
|
|
1259 |
Label L_loop;
|
|
1260 |
__ align(16);
|
|
1261 |
__ BIND(L_loop);
|
|
1262 |
__ movq(to, Address(from, qword_count, Address::times_8, 24));
|
|
1263 |
__ movq(Address(dest, qword_count, Address::times_8, 24), to);
|
|
1264 |
__ movq(to, Address(from, qword_count, Address::times_8, 16));
|
|
1265 |
__ movq(Address(dest, qword_count, Address::times_8, 16), to);
|
|
1266 |
__ movq(to, Address(from, qword_count, Address::times_8, 8));
|
|
1267 |
__ movq(Address(dest, qword_count, Address::times_8, 8), to);
|
|
1268 |
__ movq(to, Address(from, qword_count, Address::times_8, 0));
|
|
1269 |
__ movq(Address(dest, qword_count, Address::times_8, 0), to);
|
|
1270 |
__ BIND(L_copy_32_bytes);
|
|
1271 |
__ subq(qword_count, 4);
|
|
1272 |
__ jcc(Assembler::greaterEqual, L_loop);
|
|
1273 |
__ addq(qword_count, 4);
|
|
1274 |
__ jcc(Assembler::greater, L_copy_8_bytes); // Copy trailing qwords
|
|
1275 |
}
|
|
1276 |
|
|
1277 |
|
|
1278 |
// Arguments:
|
|
1279 |
// aligned - true => Input and output aligned on a HeapWord == 8-byte boundary
|
|
1280 |
// ignored
|
|
1281 |
// name - stub name string
|
|
1282 |
//
|
|
1283 |
// Inputs:
|
|
1284 |
// c_rarg0 - source array address
|
|
1285 |
// c_rarg1 - destination array address
|
|
1286 |
// c_rarg2 - element count, treated as ssize_t, can be zero
|
|
1287 |
//
|
|
1288 |
// If 'from' and/or 'to' are aligned on 4-, 2-, or 1-byte boundaries,
|
|
1289 |
// we let the hardware handle it. The one to eight bytes within words,
|
|
1290 |
// dwords or qwords that span cache line boundaries will still be loaded
|
|
1291 |
// and stored atomically.
|
|
1292 |
//
|
|
1293 |
// Side Effects:
|
|
1294 |
// disjoint_byte_copy_entry is set to the no-overlap entry point
|
|
1295 |
// used by generate_conjoint_byte_copy().
|
|
1296 |
//
|
|
1297 |
address generate_disjoint_byte_copy(bool aligned, const char *name) {
|
|
1298 |
__ align(CodeEntryAlignment);
|
|
1299 |
StubCodeMark mark(this, "StubRoutines", name);
|
|
1300 |
address start = __ pc();
|
|
1301 |
|
|
1302 |
Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes, L_copy_2_bytes;
|
|
1303 |
Label L_copy_byte, L_exit;
|
|
1304 |
const Register from = rdi; // source array address
|
|
1305 |
const Register to = rsi; // destination array address
|
|
1306 |
const Register count = rdx; // elements count
|
|
1307 |
const Register byte_count = rcx;
|
|
1308 |
const Register qword_count = count;
|
|
1309 |
const Register end_from = from; // source array end address
|
|
1310 |
const Register end_to = to; // destination array end address
|
|
1311 |
// End pointers are inclusive, and if count is not zero they point
|
|
1312 |
// to the last unit copied: end_to[0] := end_from[0]
|
|
1313 |
|
|
1314 |
__ enter(); // required for proper stackwalking of RuntimeStub frame
|
|
1315 |
assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int.
|
|
1316 |
|
|
1317 |
disjoint_byte_copy_entry = __ pc();
|
|
1318 |
BLOCK_COMMENT("Entry:");
|
|
1319 |
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
|
|
1320 |
|
|
1321 |
setup_arg_regs(); // from => rdi, to => rsi, count => rdx
|
|
1322 |
// r9 and r10 may be used to save non-volatile registers
|
|
1323 |
|
|
1324 |
// 'from', 'to' and 'count' are now valid
|
|
1325 |
__ movq(byte_count, count);
|
|
1326 |
__ shrq(count, 3); // count => qword_count
|
|
1327 |
|
|
1328 |
// Copy from low to high addresses. Use 'to' as scratch.
|
|
1329 |
__ leaq(end_from, Address(from, qword_count, Address::times_8, -8));
|
|
1330 |
__ leaq(end_to, Address(to, qword_count, Address::times_8, -8));
|
|
1331 |
__ negq(qword_count); // make the count negative
|
|
1332 |
__ jmp(L_copy_32_bytes);
|
|
1333 |
|
|
1334 |
// Copy trailing qwords
|
|
1335 |
__ BIND(L_copy_8_bytes);
|
|
1336 |
__ movq(rax, Address(end_from, qword_count, Address::times_8, 8));
|
|
1337 |
__ movq(Address(end_to, qword_count, Address::times_8, 8), rax);
|
|
1338 |
__ incrementq(qword_count);
|
|
1339 |
__ jcc(Assembler::notZero, L_copy_8_bytes);
|
|
1340 |
|
|
1341 |
// Check for and copy trailing dword
|
|
1342 |
__ BIND(L_copy_4_bytes);
|
|
1343 |
__ testq(byte_count, 4);
|
|
1344 |
__ jccb(Assembler::zero, L_copy_2_bytes);
|
|
1345 |
__ movl(rax, Address(end_from, 8));
|
|
1346 |
__ movl(Address(end_to, 8), rax);
|
|
1347 |
|
|
1348 |
__ addq(end_from, 4);
|
|
1349 |
__ addq(end_to, 4);
|
|
1350 |
|
|
1351 |
// Check for and copy trailing word
|
|
1352 |
__ BIND(L_copy_2_bytes);
|
|
1353 |
__ testq(byte_count, 2);
|
|
1354 |
__ jccb(Assembler::zero, L_copy_byte);
|
|
1355 |
__ movw(rax, Address(end_from, 8));
|
|
1356 |
__ movw(Address(end_to, 8), rax);
|
|
1357 |
|
|
1358 |
__ addq(end_from, 2);
|
|
1359 |
__ addq(end_to, 2);
|
|
1360 |
|
|
1361 |
// Check for and copy trailing byte
|
|
1362 |
__ BIND(L_copy_byte);
|
|
1363 |
__ testq(byte_count, 1);
|
|
1364 |
__ jccb(Assembler::zero, L_exit);
|
|
1365 |
__ movb(rax, Address(end_from, 8));
|
|
1366 |
__ movb(Address(end_to, 8), rax);
|
|
1367 |
|
|
1368 |
__ BIND(L_exit);
|
|
1369 |
inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr);
|
|
1370 |
restore_arg_regs();
|
|
1371 |
__ xorq(rax, rax); // return 0
|
|
1372 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
1373 |
__ ret(0);
|
|
1374 |
|
|
1375 |
// Copy in 32-bytes chunks
|
|
1376 |
copy_32_bytes_forward(end_from, end_to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes);
|
|
1377 |
__ jmp(L_copy_4_bytes);
|
|
1378 |
|
|
1379 |
return start;
|
|
1380 |
}
|
|
1381 |
|
|
1382 |
// Arguments:
|
|
1383 |
// aligned - true => Input and output aligned on a HeapWord == 8-byte boundary
|
|
1384 |
// ignored
|
|
1385 |
// name - stub name string
|
|
1386 |
//
|
|
1387 |
// Inputs:
|
|
1388 |
// c_rarg0 - source array address
|
|
1389 |
// c_rarg1 - destination array address
|
|
1390 |
// c_rarg2 - element count, treated as ssize_t, can be zero
|
|
1391 |
//
|
|
1392 |
// If 'from' and/or 'to' are aligned on 4-, 2-, or 1-byte boundaries,
|
|
1393 |
// we let the hardware handle it. The one to eight bytes within words,
|
|
1394 |
// dwords or qwords that span cache line boundaries will still be loaded
|
|
1395 |
// and stored atomically.
|
|
1396 |
//
|
|
1397 |
address generate_conjoint_byte_copy(bool aligned, const char *name) {
|
|
1398 |
__ align(CodeEntryAlignment);
|
|
1399 |
StubCodeMark mark(this, "StubRoutines", name);
|
|
1400 |
address start = __ pc();
|
|
1401 |
|
|
1402 |
Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes, L_copy_2_bytes;
|
|
1403 |
const Register from = rdi; // source array address
|
|
1404 |
const Register to = rsi; // destination array address
|
|
1405 |
const Register count = rdx; // elements count
|
|
1406 |
const Register byte_count = rcx;
|
|
1407 |
const Register qword_count = count;
|
|
1408 |
|
|
1409 |
__ enter(); // required for proper stackwalking of RuntimeStub frame
|
|
1410 |
assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int.
|
|
1411 |
|
|
1412 |
byte_copy_entry = __ pc();
|
|
1413 |
BLOCK_COMMENT("Entry:");
|
|
1414 |
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
|
|
1415 |
|
|
1416 |
array_overlap_test(disjoint_byte_copy_entry, Address::times_1);
|
|
1417 |
setup_arg_regs(); // from => rdi, to => rsi, count => rdx
|
|
1418 |
// r9 and r10 may be used to save non-volatile registers
|
|
1419 |
|
|
1420 |
// 'from', 'to' and 'count' are now valid
|
|
1421 |
__ movq(byte_count, count);
|
|
1422 |
__ shrq(count, 3); // count => qword_count
|
|
1423 |
|
|
1424 |
// Copy from high to low addresses.
|
|
1425 |
|
|
1426 |
// Check for and copy trailing byte
|
|
1427 |
__ testq(byte_count, 1);
|
|
1428 |
__ jcc(Assembler::zero, L_copy_2_bytes);
|
|
1429 |
__ movb(rax, Address(from, byte_count, Address::times_1, -1));
|
|
1430 |
__ movb(Address(to, byte_count, Address::times_1, -1), rax);
|
|
1431 |
__ decrementq(byte_count); // Adjust for possible trailing word
|
|
1432 |
|
|
1433 |
// Check for and copy trailing word
|
|
1434 |
__ BIND(L_copy_2_bytes);
|
|
1435 |
__ testq(byte_count, 2);
|
|
1436 |
__ jcc(Assembler::zero, L_copy_4_bytes);
|
|
1437 |
__ movw(rax, Address(from, byte_count, Address::times_1, -2));
|
|
1438 |
__ movw(Address(to, byte_count, Address::times_1, -2), rax);
|
|
1439 |
|
|
1440 |
// Check for and copy trailing dword
|
|
1441 |
__ BIND(L_copy_4_bytes);
|
|
1442 |
__ testq(byte_count, 4);
|
|
1443 |
__ jcc(Assembler::zero, L_copy_32_bytes);
|
|
1444 |
__ movl(rax, Address(from, qword_count, Address::times_8));
|
|
1445 |
__ movl(Address(to, qword_count, Address::times_8), rax);
|
|
1446 |
__ jmp(L_copy_32_bytes);
|
|
1447 |
|
|
1448 |
// Copy trailing qwords
|
|
1449 |
__ BIND(L_copy_8_bytes);
|
|
1450 |
__ movq(rax, Address(from, qword_count, Address::times_8, -8));
|
|
1451 |
__ movq(Address(to, qword_count, Address::times_8, -8), rax);
|
|
1452 |
__ decrementq(qword_count);
|
|
1453 |
__ jcc(Assembler::notZero, L_copy_8_bytes);
|
|
1454 |
|
|
1455 |
inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr);
|
|
1456 |
restore_arg_regs();
|
|
1457 |
__ xorq(rax, rax); // return 0
|
|
1458 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
1459 |
__ ret(0);
|
|
1460 |
|
|
1461 |
// Copy in 32-bytes chunks
|
|
1462 |
copy_32_bytes_backward(from, to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes);
|
|
1463 |
|
|
1464 |
inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr);
|
|
1465 |
restore_arg_regs();
|
|
1466 |
__ xorq(rax, rax); // return 0
|
|
1467 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
1468 |
__ ret(0);
|
|
1469 |
|
|
1470 |
return start;
|
|
1471 |
}
|
|
1472 |
|
|
1473 |
// Arguments:
|
|
1474 |
// aligned - true => Input and output aligned on a HeapWord == 8-byte boundary
|
|
1475 |
// ignored
|
|
1476 |
// name - stub name string
|
|
1477 |
//
|
|
1478 |
// Inputs:
|
|
1479 |
// c_rarg0 - source array address
|
|
1480 |
// c_rarg1 - destination array address
|
|
1481 |
// c_rarg2 - element count, treated as ssize_t, can be zero
|
|
1482 |
//
|
|
1483 |
// If 'from' and/or 'to' are aligned on 4- or 2-byte boundaries, we
|
|
1484 |
// let the hardware handle it. The two or four words within dwords
|
|
1485 |
// or qwords that span cache line boundaries will still be loaded
|
|
1486 |
// and stored atomically.
|
|
1487 |
//
|
|
1488 |
// Side Effects:
|
|
1489 |
// disjoint_short_copy_entry is set to the no-overlap entry point
|
|
1490 |
// used by generate_conjoint_short_copy().
|
|
1491 |
//
|
|
1492 |
address generate_disjoint_short_copy(bool aligned, const char *name) {
|
|
1493 |
__ align(CodeEntryAlignment);
|
|
1494 |
StubCodeMark mark(this, "StubRoutines", name);
|
|
1495 |
address start = __ pc();
|
|
1496 |
|
|
1497 |
Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes,L_copy_2_bytes,L_exit;
|
|
1498 |
const Register from = rdi; // source array address
|
|
1499 |
const Register to = rsi; // destination array address
|
|
1500 |
const Register count = rdx; // elements count
|
|
1501 |
const Register word_count = rcx;
|
|
1502 |
const Register qword_count = count;
|
|
1503 |
const Register end_from = from; // source array end address
|
|
1504 |
const Register end_to = to; // destination array end address
|
|
1505 |
// End pointers are inclusive, and if count is not zero they point
|
|
1506 |
// to the last unit copied: end_to[0] := end_from[0]
|
|
1507 |
|
|
1508 |
__ enter(); // required for proper stackwalking of RuntimeStub frame
|
|
1509 |
assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int.
|
|
1510 |
|
|
1511 |
disjoint_short_copy_entry = __ pc();
|
|
1512 |
BLOCK_COMMENT("Entry:");
|
|
1513 |
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
|
|
1514 |
|
|
1515 |
setup_arg_regs(); // from => rdi, to => rsi, count => rdx
|
|
1516 |
// r9 and r10 may be used to save non-volatile registers
|
|
1517 |
|
|
1518 |
// 'from', 'to' and 'count' are now valid
|
|
1519 |
__ movq(word_count, count);
|
|
1520 |
__ shrq(count, 2); // count => qword_count
|
|
1521 |
|
|
1522 |
// Copy from low to high addresses. Use 'to' as scratch.
|
|
1523 |
__ leaq(end_from, Address(from, qword_count, Address::times_8, -8));
|
|
1524 |
__ leaq(end_to, Address(to, qword_count, Address::times_8, -8));
|
|
1525 |
__ negq(qword_count);
|
|
1526 |
__ jmp(L_copy_32_bytes);
|
|
1527 |
|
|
1528 |
// Copy trailing qwords
|
|
1529 |
__ BIND(L_copy_8_bytes);
|
|
1530 |
__ movq(rax, Address(end_from, qword_count, Address::times_8, 8));
|
|
1531 |
__ movq(Address(end_to, qword_count, Address::times_8, 8), rax);
|
|
1532 |
__ incrementq(qword_count);
|
|
1533 |
__ jcc(Assembler::notZero, L_copy_8_bytes);
|
|
1534 |
|
|
1535 |
// Original 'dest' is trashed, so we can't use it as a
|
|
1536 |
// base register for a possible trailing word copy
|
|
1537 |
|
|
1538 |
// Check for and copy trailing dword
|
|
1539 |
__ BIND(L_copy_4_bytes);
|
|
1540 |
__ testq(word_count, 2);
|
|
1541 |
__ jccb(Assembler::zero, L_copy_2_bytes);
|
|
1542 |
__ movl(rax, Address(end_from, 8));
|
|
1543 |
__ movl(Address(end_to, 8), rax);
|
|
1544 |
|
|
1545 |
__ addq(end_from, 4);
|
|
1546 |
__ addq(end_to, 4);
|
|
1547 |
|
|
1548 |
// Check for and copy trailing word
|
|
1549 |
__ BIND(L_copy_2_bytes);
|
|
1550 |
__ testq(word_count, 1);
|
|
1551 |
__ jccb(Assembler::zero, L_exit);
|
|
1552 |
__ movw(rax, Address(end_from, 8));
|
|
1553 |
__ movw(Address(end_to, 8), rax);
|
|
1554 |
|
|
1555 |
__ BIND(L_exit);
|
|
1556 |
inc_counter_np(SharedRuntime::_jshort_array_copy_ctr);
|
|
1557 |
restore_arg_regs();
|
|
1558 |
__ xorq(rax, rax); // return 0
|
|
1559 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
1560 |
__ ret(0);
|
|
1561 |
|
|
1562 |
// Copy in 32-bytes chunks
|
|
1563 |
copy_32_bytes_forward(end_from, end_to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes);
|
|
1564 |
__ jmp(L_copy_4_bytes);
|
|
1565 |
|
|
1566 |
return start;
|
|
1567 |
}
|
|
1568 |
|
|
1569 |
// Arguments:
|
|
1570 |
// aligned - true => Input and output aligned on a HeapWord == 8-byte boundary
|
|
1571 |
// ignored
|
|
1572 |
// name - stub name string
|
|
1573 |
//
|
|
1574 |
// Inputs:
|
|
1575 |
// c_rarg0 - source array address
|
|
1576 |
// c_rarg1 - destination array address
|
|
1577 |
// c_rarg2 - element count, treated as ssize_t, can be zero
|
|
1578 |
//
|
|
1579 |
// If 'from' and/or 'to' are aligned on 4- or 2-byte boundaries, we
|
|
1580 |
// let the hardware handle it. The two or four words within dwords
|
|
1581 |
// or qwords that span cache line boundaries will still be loaded
|
|
1582 |
// and stored atomically.
|
|
1583 |
//
|
|
1584 |
address generate_conjoint_short_copy(bool aligned, const char *name) {
|
|
1585 |
__ align(CodeEntryAlignment);
|
|
1586 |
StubCodeMark mark(this, "StubRoutines", name);
|
|
1587 |
address start = __ pc();
|
|
1588 |
|
|
1589 |
Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes;
|
|
1590 |
const Register from = rdi; // source array address
|
|
1591 |
const Register to = rsi; // destination array address
|
|
1592 |
const Register count = rdx; // elements count
|
|
1593 |
const Register word_count = rcx;
|
|
1594 |
const Register qword_count = count;
|
|
1595 |
|
|
1596 |
__ enter(); // required for proper stackwalking of RuntimeStub frame
|
|
1597 |
assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int.
|
|
1598 |
|
|
1599 |
short_copy_entry = __ pc();
|
|
1600 |
BLOCK_COMMENT("Entry:");
|
|
1601 |
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
|
|
1602 |
|
|
1603 |
array_overlap_test(disjoint_short_copy_entry, Address::times_2);
|
|
1604 |
setup_arg_regs(); // from => rdi, to => rsi, count => rdx
|
|
1605 |
// r9 and r10 may be used to save non-volatile registers
|
|
1606 |
|
|
1607 |
// 'from', 'to' and 'count' are now valid
|
|
1608 |
__ movq(word_count, count);
|
|
1609 |
__ shrq(count, 2); // count => qword_count
|
|
1610 |
|
|
1611 |
// Copy from high to low addresses. Use 'to' as scratch.
|
|
1612 |
|
|
1613 |
// Check for and copy trailing word
|
|
1614 |
__ testq(word_count, 1);
|
|
1615 |
__ jccb(Assembler::zero, L_copy_4_bytes);
|
|
1616 |
__ movw(rax, Address(from, word_count, Address::times_2, -2));
|
|
1617 |
__ movw(Address(to, word_count, Address::times_2, -2), rax);
|
|
1618 |
|
|
1619 |
// Check for and copy trailing dword
|
|
1620 |
__ BIND(L_copy_4_bytes);
|
|
1621 |
__ testq(word_count, 2);
|
|
1622 |
__ jcc(Assembler::zero, L_copy_32_bytes);
|
|
1623 |
__ movl(rax, Address(from, qword_count, Address::times_8));
|
|
1624 |
__ movl(Address(to, qword_count, Address::times_8), rax);
|
|
1625 |
__ jmp(L_copy_32_bytes);
|
|
1626 |
|
|
1627 |
// Copy trailing qwords
|
|
1628 |
__ BIND(L_copy_8_bytes);
|
|
1629 |
__ movq(rax, Address(from, qword_count, Address::times_8, -8));
|
|
1630 |
__ movq(Address(to, qword_count, Address::times_8, -8), rax);
|
|
1631 |
__ decrementq(qword_count);
|
|
1632 |
__ jcc(Assembler::notZero, L_copy_8_bytes);
|
|
1633 |
|
|
1634 |
inc_counter_np(SharedRuntime::_jshort_array_copy_ctr);
|
|
1635 |
restore_arg_regs();
|
|
1636 |
__ xorq(rax, rax); // return 0
|
|
1637 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
1638 |
__ ret(0);
|
|
1639 |
|
|
1640 |
// Copy in 32-bytes chunks
|
|
1641 |
copy_32_bytes_backward(from, to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes);
|
|
1642 |
|
|
1643 |
inc_counter_np(SharedRuntime::_jshort_array_copy_ctr);
|
|
1644 |
restore_arg_regs();
|
|
1645 |
__ xorq(rax, rax); // return 0
|
|
1646 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
1647 |
__ ret(0);
|
|
1648 |
|
|
1649 |
return start;
|
|
1650 |
}
|
|
1651 |
|
|
1652 |
// Arguments:
|
|
1653 |
// aligned - true => Input and output aligned on a HeapWord == 8-byte boundary
|
|
1654 |
// ignored
|
|
1655 |
// name - stub name string
|
|
1656 |
//
|
|
1657 |
// Inputs:
|
|
1658 |
// c_rarg0 - source array address
|
|
1659 |
// c_rarg1 - destination array address
|
|
1660 |
// c_rarg2 - element count, treated as ssize_t, can be zero
|
|
1661 |
//
|
|
1662 |
// If 'from' and/or 'to' are aligned on 4-byte boundaries, we let
|
|
1663 |
// the hardware handle it. The two dwords within qwords that span
|
|
1664 |
// cache line boundaries will still be loaded and stored atomicly.
|
|
1665 |
//
|
|
1666 |
// Side Effects:
|
|
1667 |
// disjoint_int_copy_entry is set to the no-overlap entry point
|
|
1668 |
// used by generate_conjoint_int_copy().
|
|
1669 |
//
|
|
1670 |
address generate_disjoint_int_copy(bool aligned, const char *name) {
|
|
1671 |
__ align(CodeEntryAlignment);
|
|
1672 |
StubCodeMark mark(this, "StubRoutines", name);
|
|
1673 |
address start = __ pc();
|
|
1674 |
|
|
1675 |
Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes, L_exit;
|
|
1676 |
const Register from = rdi; // source array address
|
|
1677 |
const Register to = rsi; // destination array address
|
|
1678 |
const Register count = rdx; // elements count
|
|
1679 |
const Register dword_count = rcx;
|
|
1680 |
const Register qword_count = count;
|
|
1681 |
const Register end_from = from; // source array end address
|
|
1682 |
const Register end_to = to; // destination array end address
|
|
1683 |
// End pointers are inclusive, and if count is not zero they point
|
|
1684 |
// to the last unit copied: end_to[0] := end_from[0]
|
|
1685 |
|
|
1686 |
__ enter(); // required for proper stackwalking of RuntimeStub frame
|
|
1687 |
assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int.
|
|
1688 |
|
|
1689 |
disjoint_int_copy_entry = __ pc();
|
|
1690 |
BLOCK_COMMENT("Entry:");
|
|
1691 |
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
|
|
1692 |
|
|
1693 |
setup_arg_regs(); // from => rdi, to => rsi, count => rdx
|
|
1694 |
// r9 and r10 may be used to save non-volatile registers
|
|
1695 |
|
|
1696 |
// 'from', 'to' and 'count' are now valid
|
|
1697 |
__ movq(dword_count, count);
|
|
1698 |
__ shrq(count, 1); // count => qword_count
|
|
1699 |
|
|
1700 |
// Copy from low to high addresses. Use 'to' as scratch.
|
|
1701 |
__ leaq(end_from, Address(from, qword_count, Address::times_8, -8));
|
|
1702 |
__ leaq(end_to, Address(to, qword_count, Address::times_8, -8));
|
|
1703 |
__ negq(qword_count);
|
|
1704 |
__ jmp(L_copy_32_bytes);
|
|
1705 |
|
|
1706 |
// Copy trailing qwords
|
|
1707 |
__ BIND(L_copy_8_bytes);
|
|
1708 |
__ movq(rax, Address(end_from, qword_count, Address::times_8, 8));
|
|
1709 |
__ movq(Address(end_to, qword_count, Address::times_8, 8), rax);
|
|
1710 |
__ incrementq(qword_count);
|
|
1711 |
__ jcc(Assembler::notZero, L_copy_8_bytes);
|
|
1712 |
|
|
1713 |
// Check for and copy trailing dword
|
|
1714 |
__ BIND(L_copy_4_bytes);
|
|
1715 |
__ testq(dword_count, 1); // Only byte test since the value is 0 or 1
|
|
1716 |
__ jccb(Assembler::zero, L_exit);
|
|
1717 |
__ movl(rax, Address(end_from, 8));
|
|
1718 |
__ movl(Address(end_to, 8), rax);
|
|
1719 |
|
|
1720 |
__ BIND(L_exit);
|
|
1721 |
inc_counter_np(SharedRuntime::_jint_array_copy_ctr);
|
|
1722 |
restore_arg_regs();
|
|
1723 |
__ xorq(rax, rax); // return 0
|
|
1724 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
1725 |
__ ret(0);
|
|
1726 |
|
|
1727 |
// Copy 32-bytes chunks
|
|
1728 |
copy_32_bytes_forward(end_from, end_to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes);
|
|
1729 |
__ jmp(L_copy_4_bytes);
|
|
1730 |
|
|
1731 |
return start;
|
|
1732 |
}
|
|
1733 |
|
|
1734 |
// Arguments:
|
|
1735 |
// aligned - true => Input and output aligned on a HeapWord == 8-byte boundary
|
|
1736 |
// ignored
|
|
1737 |
// name - stub name string
|
|
1738 |
//
|
|
1739 |
// Inputs:
|
|
1740 |
// c_rarg0 - source array address
|
|
1741 |
// c_rarg1 - destination array address
|
|
1742 |
// c_rarg2 - element count, treated as ssize_t, can be zero
|
|
1743 |
//
|
|
1744 |
// If 'from' and/or 'to' are aligned on 4-byte boundaries, we let
|
|
1745 |
// the hardware handle it. The two dwords within qwords that span
|
|
1746 |
// cache line boundaries will still be loaded and stored atomicly.
|
|
1747 |
//
|
|
1748 |
address generate_conjoint_int_copy(bool aligned, const char *name) {
|
|
1749 |
__ align(CodeEntryAlignment);
|
|
1750 |
StubCodeMark mark(this, "StubRoutines", name);
|
|
1751 |
address start = __ pc();
|
|
1752 |
|
|
1753 |
Label L_copy_32_bytes, L_copy_8_bytes, L_copy_2_bytes;
|
|
1754 |
const Register from = rdi; // source array address
|
|
1755 |
const Register to = rsi; // destination array address
|
|
1756 |
const Register count = rdx; // elements count
|
|
1757 |
const Register dword_count = rcx;
|
|
1758 |
const Register qword_count = count;
|
|
1759 |
|
|
1760 |
__ enter(); // required for proper stackwalking of RuntimeStub frame
|
|
1761 |
assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int.
|
|
1762 |
|
|
1763 |
int_copy_entry = __ pc();
|
|
1764 |
BLOCK_COMMENT("Entry:");
|
|
1765 |
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
|
|
1766 |
|
|
1767 |
array_overlap_test(disjoint_int_copy_entry, Address::times_4);
|
|
1768 |
setup_arg_regs(); // from => rdi, to => rsi, count => rdx
|
|
1769 |
// r9 and r10 may be used to save non-volatile registers
|
|
1770 |
|
|
1771 |
// 'from', 'to' and 'count' are now valid
|
|
1772 |
__ movq(dword_count, count);
|
|
1773 |
__ shrq(count, 1); // count => qword_count
|
|
1774 |
|
|
1775 |
// Copy from high to low addresses. Use 'to' as scratch.
|
|
1776 |
|
|
1777 |
// Check for and copy trailing dword
|
|
1778 |
__ testq(dword_count, 1);
|
|
1779 |
__ jcc(Assembler::zero, L_copy_32_bytes);
|
|
1780 |
__ movl(rax, Address(from, dword_count, Address::times_4, -4));
|
|
1781 |
__ movl(Address(to, dword_count, Address::times_4, -4), rax);
|
|
1782 |
__ jmp(L_copy_32_bytes);
|
|
1783 |
|
|
1784 |
// Copy trailing qwords
|
|
1785 |
__ BIND(L_copy_8_bytes);
|
|
1786 |
__ movq(rax, Address(from, qword_count, Address::times_8, -8));
|
|
1787 |
__ movq(Address(to, qword_count, Address::times_8, -8), rax);
|
|
1788 |
__ decrementq(qword_count);
|
|
1789 |
__ jcc(Assembler::notZero, L_copy_8_bytes);
|
|
1790 |
|
|
1791 |
inc_counter_np(SharedRuntime::_jint_array_copy_ctr);
|
|
1792 |
restore_arg_regs();
|
|
1793 |
__ xorq(rax, rax); // return 0
|
|
1794 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
1795 |
__ ret(0);
|
|
1796 |
|
|
1797 |
// Copy in 32-bytes chunks
|
|
1798 |
copy_32_bytes_backward(from, to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes);
|
|
1799 |
|
|
1800 |
inc_counter_np(SharedRuntime::_jint_array_copy_ctr);
|
|
1801 |
restore_arg_regs();
|
|
1802 |
__ xorq(rax, rax); // return 0
|
|
1803 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
1804 |
__ ret(0);
|
|
1805 |
|
|
1806 |
return start;
|
|
1807 |
}
|
|
1808 |
|
|
1809 |
// Arguments:
|
|
1810 |
// aligned - true => Input and output aligned on a HeapWord boundary == 8 bytes
|
|
1811 |
// ignored
|
|
1812 |
// is_oop - true => oop array, so generate store check code
|
|
1813 |
// name - stub name string
|
|
1814 |
//
|
|
1815 |
// Inputs:
|
|
1816 |
// c_rarg0 - source array address
|
|
1817 |
// c_rarg1 - destination array address
|
|
1818 |
// c_rarg2 - element count, treated as ssize_t, can be zero
|
|
1819 |
//
|
|
1820 |
// Side Effects:
|
|
1821 |
// disjoint_oop_copy_entry or disjoint_long_copy_entry is set to the
|
|
1822 |
// no-overlap entry point used by generate_conjoint_long_oop_copy().
|
|
1823 |
//
|
|
1824 |
address generate_disjoint_long_oop_copy(bool aligned, bool is_oop, const char *name) {
|
|
1825 |
__ align(CodeEntryAlignment);
|
|
1826 |
StubCodeMark mark(this, "StubRoutines", name);
|
|
1827 |
address start = __ pc();
|
|
1828 |
|
|
1829 |
Label L_copy_32_bytes, L_copy_8_bytes, L_exit;
|
|
1830 |
const Register from = rdi; // source array address
|
|
1831 |
const Register to = rsi; // destination array address
|
|
1832 |
const Register qword_count = rdx; // elements count
|
|
1833 |
const Register end_from = from; // source array end address
|
|
1834 |
const Register end_to = rcx; // destination array end address
|
|
1835 |
const Register saved_to = to;
|
|
1836 |
// End pointers are inclusive, and if count is not zero they point
|
|
1837 |
// to the last unit copied: end_to[0] := end_from[0]
|
|
1838 |
|
|
1839 |
__ enter(); // required for proper stackwalking of RuntimeStub frame
|
|
1840 |
// Save no-overlap entry point for generate_conjoint_long_oop_copy()
|
|
1841 |
assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int.
|
|
1842 |
|
|
1843 |
if (is_oop) {
|
|
1844 |
disjoint_oop_copy_entry = __ pc();
|
|
1845 |
// no registers are destroyed by this call
|
|
1846 |
gen_write_ref_array_pre_barrier(/* dest */ c_rarg1, /* count */ c_rarg2);
|
|
1847 |
} else {
|
|
1848 |
disjoint_long_copy_entry = __ pc();
|
|
1849 |
}
|
|
1850 |
BLOCK_COMMENT("Entry:");
|
|
1851 |
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
|
|
1852 |
|
|
1853 |
setup_arg_regs(); // from => rdi, to => rsi, count => rdx
|
|
1854 |
// r9 and r10 may be used to save non-volatile registers
|
|
1855 |
|
|
1856 |
// 'from', 'to' and 'qword_count' are now valid
|
|
1857 |
|
|
1858 |
// Copy from low to high addresses. Use 'to' as scratch.
|
|
1859 |
__ leaq(end_from, Address(from, qword_count, Address::times_8, -8));
|
|
1860 |
__ leaq(end_to, Address(to, qword_count, Address::times_8, -8));
|
|
1861 |
__ negq(qword_count);
|
|
1862 |
__ jmp(L_copy_32_bytes);
|
|
1863 |
|
|
1864 |
// Copy trailing qwords
|
|
1865 |
__ BIND(L_copy_8_bytes);
|
|
1866 |
__ movq(rax, Address(end_from, qword_count, Address::times_8, 8));
|
|
1867 |
__ movq(Address(end_to, qword_count, Address::times_8, 8), rax);
|
|
1868 |
__ incrementq(qword_count);
|
|
1869 |
__ jcc(Assembler::notZero, L_copy_8_bytes);
|
|
1870 |
|
|
1871 |
if (is_oop) {
|
|
1872 |
__ jmp(L_exit);
|
|
1873 |
} else {
|
|
1874 |
inc_counter_np(SharedRuntime::_jlong_array_copy_ctr);
|
|
1875 |
restore_arg_regs();
|
|
1876 |
__ xorq(rax, rax); // return 0
|
|
1877 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
1878 |
__ ret(0);
|
|
1879 |
}
|
|
1880 |
|
|
1881 |
// Copy 64-byte chunks
|
|
1882 |
copy_32_bytes_forward(end_from, end_to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes);
|
|
1883 |
|
|
1884 |
if (is_oop) {
|
|
1885 |
__ BIND(L_exit);
|
|
1886 |
gen_write_ref_array_post_barrier(saved_to, end_to, rax);
|
|
1887 |
inc_counter_np(SharedRuntime::_oop_array_copy_ctr);
|
|
1888 |
} else {
|
|
1889 |
inc_counter_np(SharedRuntime::_jlong_array_copy_ctr);
|
|
1890 |
}
|
|
1891 |
restore_arg_regs();
|
|
1892 |
__ xorq(rax, rax); // return 0
|
|
1893 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
1894 |
__ ret(0);
|
|
1895 |
|
|
1896 |
return start;
|
|
1897 |
}
|
|
1898 |
|
|
1899 |
// Arguments:
|
|
1900 |
// aligned - true => Input and output aligned on a HeapWord boundary == 8 bytes
|
|
1901 |
// ignored
|
|
1902 |
// is_oop - true => oop array, so generate store check code
|
|
1903 |
// name - stub name string
|
|
1904 |
//
|
|
1905 |
// Inputs:
|
|
1906 |
// c_rarg0 - source array address
|
|
1907 |
// c_rarg1 - destination array address
|
|
1908 |
// c_rarg2 - element count, treated as ssize_t, can be zero
|
|
1909 |
//
|
|
1910 |
address generate_conjoint_long_oop_copy(bool aligned, bool is_oop, const char *name) {
|
|
1911 |
__ align(CodeEntryAlignment);
|
|
1912 |
StubCodeMark mark(this, "StubRoutines", name);
|
|
1913 |
address start = __ pc();
|
|
1914 |
|
|
1915 |
Label L_copy_32_bytes, L_copy_8_bytes, L_exit;
|
|
1916 |
const Register from = rdi; // source array address
|
|
1917 |
const Register to = rsi; // destination array address
|
|
1918 |
const Register qword_count = rdx; // elements count
|
|
1919 |
const Register saved_count = rcx;
|
|
1920 |
|
|
1921 |
__ enter(); // required for proper stackwalking of RuntimeStub frame
|
|
1922 |
assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int.
|
|
1923 |
|
|
1924 |
address disjoint_copy_entry = NULL;
|
|
1925 |
if (is_oop) {
|
|
1926 |
disjoint_copy_entry = disjoint_oop_copy_entry;
|
|
1927 |
oop_copy_entry = __ pc();
|
|
1928 |
} else {
|
|
1929 |
disjoint_copy_entry = disjoint_long_copy_entry;
|
|
1930 |
long_copy_entry = __ pc();
|
|
1931 |
}
|
|
1932 |
BLOCK_COMMENT("Entry:");
|
|
1933 |
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
|
|
1934 |
|
|
1935 |
array_overlap_test(disjoint_copy_entry, Address::times_8);
|
|
1936 |
setup_arg_regs(); // from => rdi, to => rsi, count => rdx
|
|
1937 |
// r9 and r10 may be used to save non-volatile registers
|
|
1938 |
|
|
1939 |
// 'from', 'to' and 'qword_count' are now valid
|
|
1940 |
|
|
1941 |
if (is_oop) {
|
|
1942 |
// Save to and count for store barrier
|
|
1943 |
__ movq(saved_count, qword_count);
|
|
1944 |
// No registers are destroyed by this call
|
|
1945 |
gen_write_ref_array_pre_barrier(to, saved_count);
|
|
1946 |
}
|
|
1947 |
|
|
1948 |
// Copy from high to low addresses. Use rcx as scratch.
|
|
1949 |
|
|
1950 |
__ jmp(L_copy_32_bytes);
|
|
1951 |
|
|
1952 |
// Copy trailing qwords
|
|
1953 |
__ BIND(L_copy_8_bytes);
|
|
1954 |
__ movq(rax, Address(from, qword_count, Address::times_8, -8));
|
|
1955 |
__ movq(Address(to, qword_count, Address::times_8, -8), rax);
|
|
1956 |
__ decrementq(qword_count);
|
|
1957 |
__ jcc(Assembler::notZero, L_copy_8_bytes);
|
|
1958 |
|
|
1959 |
if (is_oop) {
|
|
1960 |
__ jmp(L_exit);
|
|
1961 |
} else {
|
|
1962 |
inc_counter_np(SharedRuntime::_jlong_array_copy_ctr);
|
|
1963 |
restore_arg_regs();
|
|
1964 |
__ xorq(rax, rax); // return 0
|
|
1965 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
1966 |
__ ret(0);
|
|
1967 |
}
|
|
1968 |
|
|
1969 |
// Copy in 32-bytes chunks
|
|
1970 |
copy_32_bytes_backward(from, to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes);
|
|
1971 |
|
|
1972 |
if (is_oop) {
|
|
1973 |
__ BIND(L_exit);
|
|
1974 |
__ leaq(rcx, Address(to, saved_count, Address::times_8, -8));
|
|
1975 |
gen_write_ref_array_post_barrier(to, rcx, rax);
|
|
1976 |
inc_counter_np(SharedRuntime::_oop_array_copy_ctr);
|
|
1977 |
} else {
|
|
1978 |
inc_counter_np(SharedRuntime::_jlong_array_copy_ctr);
|
|
1979 |
}
|
|
1980 |
restore_arg_regs();
|
|
1981 |
__ xorq(rax, rax); // return 0
|
|
1982 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
1983 |
__ ret(0);
|
|
1984 |
|
|
1985 |
return start;
|
|
1986 |
}
|
|
1987 |
|
|
1988 |
|
|
1989 |
// Helper for generating a dynamic type check.
|
|
1990 |
// Smashes no registers.
|
|
1991 |
void generate_type_check(Register sub_klass,
|
|
1992 |
Register super_check_offset,
|
|
1993 |
Register super_klass,
|
|
1994 |
Label& L_success) {
|
|
1995 |
assert_different_registers(sub_klass, super_check_offset, super_klass);
|
|
1996 |
|
|
1997 |
BLOCK_COMMENT("type_check:");
|
|
1998 |
|
|
1999 |
Label L_miss;
|
|
2000 |
|
|
2001 |
// a couple of useful fields in sub_klass:
|
|
2002 |
int ss_offset = (klassOopDesc::header_size() * HeapWordSize +
|
|
2003 |
Klass::secondary_supers_offset_in_bytes());
|
|
2004 |
int sc_offset = (klassOopDesc::header_size() * HeapWordSize +
|
|
2005 |
Klass::secondary_super_cache_offset_in_bytes());
|
|
2006 |
Address secondary_supers_addr(sub_klass, ss_offset);
|
|
2007 |
Address super_cache_addr( sub_klass, sc_offset);
|
|
2008 |
|
|
2009 |
// if the pointers are equal, we are done (e.g., String[] elements)
|
|
2010 |
__ cmpq(super_klass, sub_klass);
|
|
2011 |
__ jcc(Assembler::equal, L_success);
|
|
2012 |
|
|
2013 |
// check the supertype display:
|
|
2014 |
Address super_check_addr(sub_klass, super_check_offset, Address::times_1, 0);
|
|
2015 |
__ cmpq(super_klass, super_check_addr); // test the super type
|
|
2016 |
__ jcc(Assembler::equal, L_success);
|
|
2017 |
|
|
2018 |
// if it was a primary super, we can just fail immediately
|
|
2019 |
__ cmpl(super_check_offset, sc_offset);
|
|
2020 |
__ jcc(Assembler::notEqual, L_miss);
|
|
2021 |
|
|
2022 |
// Now do a linear scan of the secondary super-klass chain.
|
|
2023 |
// The repne_scan instruction uses fixed registers, which we must spill.
|
|
2024 |
// (We need a couple more temps in any case.)
|
|
2025 |
// This code is rarely used, so simplicity is a virtue here.
|
|
2026 |
inc_counter_np(SharedRuntime::_partial_subtype_ctr);
|
|
2027 |
{
|
|
2028 |
__ pushq(rax);
|
|
2029 |
__ pushq(rcx);
|
|
2030 |
__ pushq(rdi);
|
|
2031 |
assert_different_registers(sub_klass, super_klass, rax, rcx, rdi);
|
|
2032 |
|
|
2033 |
__ movq(rdi, secondary_supers_addr);
|
|
2034 |
// Load the array length.
|
|
2035 |
__ movl(rcx, Address(rdi, arrayOopDesc::length_offset_in_bytes()));
|
|
2036 |
// Skip to start of data.
|
|
2037 |
__ addq(rdi, arrayOopDesc::base_offset_in_bytes(T_OBJECT));
|
|
2038 |
// Scan rcx words at [rdi] for occurance of rax
|
|
2039 |
// Set NZ/Z based on last compare
|
|
2040 |
__ movq(rax, super_klass);
|
|
2041 |
__ repne_scan();
|
|
2042 |
|
|
2043 |
// Unspill the temp. registers:
|
|
2044 |
__ popq(rdi);
|
|
2045 |
__ popq(rcx);
|
|
2046 |
__ popq(rax);
|
|
2047 |
|
|
2048 |
__ jcc(Assembler::notEqual, L_miss);
|
|
2049 |
}
|
|
2050 |
|
|
2051 |
// Success. Cache the super we found and proceed in triumph.
|
|
2052 |
__ movq(super_cache_addr, super_klass); // note: rax is dead
|
|
2053 |
__ jmp(L_success);
|
|
2054 |
|
|
2055 |
// Fall through on failure!
|
|
2056 |
__ BIND(L_miss);
|
|
2057 |
}
|
|
2058 |
|
|
2059 |
//
|
|
2060 |
// Generate checkcasting array copy stub
|
|
2061 |
//
|
|
2062 |
// Input:
|
|
2063 |
// c_rarg0 - source array address
|
|
2064 |
// c_rarg1 - destination array address
|
|
2065 |
// c_rarg2 - element count, treated as ssize_t, can be zero
|
|
2066 |
// c_rarg3 - size_t ckoff (super_check_offset)
|
|
2067 |
// not Win64
|
|
2068 |
// c_rarg4 - oop ckval (super_klass)
|
|
2069 |
// Win64
|
|
2070 |
// rsp+40 - oop ckval (super_klass)
|
|
2071 |
//
|
|
2072 |
// Output:
|
|
2073 |
// rax == 0 - success
|
|
2074 |
// rax == -1^K - failure, where K is partial transfer count
|
|
2075 |
//
|
|
2076 |
address generate_checkcast_copy(const char *name) {
|
|
2077 |
|
|
2078 |
Label L_load_element, L_store_element, L_do_card_marks, L_done;
|
|
2079 |
|
|
2080 |
// Input registers (after setup_arg_regs)
|
|
2081 |
const Register from = rdi; // source array address
|
|
2082 |
const Register to = rsi; // destination array address
|
|
2083 |
const Register length = rdx; // elements count
|
|
2084 |
const Register ckoff = rcx; // super_check_offset
|
|
2085 |
const Register ckval = r8; // super_klass
|
|
2086 |
|
|
2087 |
// Registers used as temps (r13, r14 are save-on-entry)
|
|
2088 |
const Register end_from = from; // source array end address
|
|
2089 |
const Register end_to = r13; // destination array end address
|
|
2090 |
const Register count = rdx; // -(count_remaining)
|
|
2091 |
const Register r14_length = r14; // saved copy of length
|
|
2092 |
// End pointers are inclusive, and if length is not zero they point
|
|
2093 |
// to the last unit copied: end_to[0] := end_from[0]
|
|
2094 |
|
|
2095 |
const Register rax_oop = rax; // actual oop copied
|
|
2096 |
const Register r11_klass = r11; // oop._klass
|
|
2097 |
|
|
2098 |
//---------------------------------------------------------------
|
|
2099 |
// Assembler stub will be used for this call to arraycopy
|
|
2100 |
// if the two arrays are subtypes of Object[] but the
|
|
2101 |
// destination array type is not equal to or a supertype
|
|
2102 |
// of the source type. Each element must be separately
|
|
2103 |
// checked.
|
|
2104 |
|
|
2105 |
__ align(CodeEntryAlignment);
|
|
2106 |
StubCodeMark mark(this, "StubRoutines", name);
|
|
2107 |
address start = __ pc();
|
|
2108 |
|
|
2109 |
__ enter(); // required for proper stackwalking of RuntimeStub frame
|
|
2110 |
|
|
2111 |
checkcast_copy_entry = __ pc();
|
|
2112 |
BLOCK_COMMENT("Entry:");
|
|
2113 |
|
|
2114 |
#ifdef ASSERT
|
|
2115 |
// caller guarantees that the arrays really are different
|
|
2116 |
// otherwise, we would have to make conjoint checks
|
|
2117 |
{ Label L;
|
|
2118 |
array_overlap_test(L, Address::times_8);
|
|
2119 |
__ stop("checkcast_copy within a single array");
|
|
2120 |
__ bind(L);
|
|
2121 |
}
|
|
2122 |
#endif //ASSERT
|
|
2123 |
|
|
2124 |
// allocate spill slots for r13, r14
|
|
2125 |
enum {
|
|
2126 |
saved_r13_offset,
|
|
2127 |
saved_r14_offset,
|
|
2128 |
saved_rbp_offset,
|
|
2129 |
saved_rip_offset,
|
|
2130 |
saved_rarg0_offset
|
|
2131 |
};
|
|
2132 |
__ subq(rsp, saved_rbp_offset * wordSize);
|
|
2133 |
__ movq(Address(rsp, saved_r13_offset * wordSize), r13);
|
|
2134 |
__ movq(Address(rsp, saved_r14_offset * wordSize), r14);
|
|
2135 |
setup_arg_regs(4); // from => rdi, to => rsi, length => rdx
|
|
2136 |
// ckoff => rcx, ckval => r8
|
|
2137 |
// r9 and r10 may be used to save non-volatile registers
|
|
2138 |
#ifdef _WIN64
|
|
2139 |
// last argument (#4) is on stack on Win64
|
|
2140 |
const int ckval_offset = saved_rarg0_offset + 4;
|
|
2141 |
__ movq(ckval, Address(rsp, ckval_offset * wordSize));
|
|
2142 |
#endif
|
|
2143 |
|
|
2144 |
// check that int operands are properly extended to size_t
|
|
2145 |
assert_clean_int(length, rax);
|
|
2146 |
assert_clean_int(ckoff, rax);
|
|
2147 |
|
|
2148 |
#ifdef ASSERT
|
|
2149 |
BLOCK_COMMENT("assert consistent ckoff/ckval");
|
|
2150 |
// The ckoff and ckval must be mutually consistent,
|
|
2151 |
// even though caller generates both.
|
|
2152 |
{ Label L;
|
|
2153 |
int sco_offset = (klassOopDesc::header_size() * HeapWordSize +
|
|
2154 |
Klass::super_check_offset_offset_in_bytes());
|
|
2155 |
__ cmpl(ckoff, Address(ckval, sco_offset));
|
|
2156 |
__ jcc(Assembler::equal, L);
|
|
2157 |
__ stop("super_check_offset inconsistent");
|
|
2158 |
__ bind(L);
|
|
2159 |
}
|
|
2160 |
#endif //ASSERT
|
|
2161 |
|
|
2162 |
// Loop-invariant addresses. They are exclusive end pointers.
|
|
2163 |
Address end_from_addr(from, length, Address::times_8, 0);
|
|
2164 |
Address end_to_addr(to, length, Address::times_8, 0);
|
|
2165 |
// Loop-variant addresses. They assume post-incremented count < 0.
|
|
2166 |
Address from_element_addr(end_from, count, Address::times_8, 0);
|
|
2167 |
Address to_element_addr(end_to, count, Address::times_8, 0);
|
|
2168 |
Address oop_klass_addr(rax_oop, oopDesc::klass_offset_in_bytes());
|
|
2169 |
|
|
2170 |
gen_write_ref_array_pre_barrier(to, count);
|
|
2171 |
|
|
2172 |
// Copy from low to high addresses, indexed from the end of each array.
|
|
2173 |
__ leaq(end_from, end_from_addr);
|
|
2174 |
__ leaq(end_to, end_to_addr);
|
|
2175 |
__ movq(r14_length, length); // save a copy of the length
|
|
2176 |
assert(length == count, ""); // else fix next line:
|
|
2177 |
__ negq(count); // negate and test the length
|
|
2178 |
__ jcc(Assembler::notZero, L_load_element);
|
|
2179 |
|
|
2180 |
// Empty array: Nothing to do.
|
|
2181 |
__ xorq(rax, rax); // return 0 on (trivial) success
|
|
2182 |
__ jmp(L_done);
|
|
2183 |
|
|
2184 |
// ======== begin loop ========
|
|
2185 |
// (Loop is rotated; its entry is L_load_element.)
|
|
2186 |
// Loop control:
|
|
2187 |
// for (count = -count; count != 0; count++)
|
|
2188 |
// Base pointers src, dst are biased by 8*(count-1),to last element.
|
|
2189 |
__ align(16);
|
|
2190 |
|
|
2191 |
__ BIND(L_store_element);
|
|
2192 |
__ movq(to_element_addr, rax_oop); // store the oop
|
|
2193 |
__ incrementq(count); // increment the count toward zero
|
|
2194 |
__ jcc(Assembler::zero, L_do_card_marks);
|
|
2195 |
|
|
2196 |
// ======== loop entry is here ========
|
|
2197 |
__ BIND(L_load_element);
|
|
2198 |
__ movq(rax_oop, from_element_addr); // load the oop
|
|
2199 |
__ testq(rax_oop, rax_oop);
|
|
2200 |
__ jcc(Assembler::zero, L_store_element);
|
|
2201 |
|
|
2202 |
__ movq(r11_klass, oop_klass_addr); // query the object klass
|
|
2203 |
generate_type_check(r11_klass, ckoff, ckval, L_store_element);
|
|
2204 |
// ======== end loop ========
|
|
2205 |
|
|
2206 |
// It was a real error; we must depend on the caller to finish the job.
|
|
2207 |
// Register rdx = -1 * number of *remaining* oops, r14 = *total* oops.
|
|
2208 |
// Emit GC store barriers for the oops we have copied (r14 + rdx),
|
|
2209 |
// and report their number to the caller.
|
|
2210 |
assert_different_registers(rax, r14_length, count, to, end_to, rcx);
|
|
2211 |
__ leaq(end_to, to_element_addr);
|
|
2212 |
gen_write_ref_array_post_barrier(to, end_to, rcx);
|
|
2213 |
__ movq(rax, r14_length); // original oops
|
|
2214 |
__ addq(rax, count); // K = (original - remaining) oops
|
|
2215 |
__ notq(rax); // report (-1^K) to caller
|
|
2216 |
__ jmp(L_done);
|
|
2217 |
|
|
2218 |
// Come here on success only.
|
|
2219 |
__ BIND(L_do_card_marks);
|
|
2220 |
__ addq(end_to, -wordSize); // make an inclusive end pointer
|
|
2221 |
gen_write_ref_array_post_barrier(to, end_to, rcx);
|
|
2222 |
__ xorq(rax, rax); // return 0 on success
|
|
2223 |
|
|
2224 |
// Common exit point (success or failure).
|
|
2225 |
__ BIND(L_done);
|
|
2226 |
__ movq(r13, Address(rsp, saved_r13_offset * wordSize));
|
|
2227 |
__ movq(r14, Address(rsp, saved_r14_offset * wordSize));
|
|
2228 |
inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr);
|
|
2229 |
restore_arg_regs();
|
|
2230 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
2231 |
__ ret(0);
|
|
2232 |
|
|
2233 |
return start;
|
|
2234 |
}
|
|
2235 |
|
|
2236 |
//
|
|
2237 |
// Generate 'unsafe' array copy stub
|
|
2238 |
// Though just as safe as the other stubs, it takes an unscaled
|
|
2239 |
// size_t argument instead of an element count.
|
|
2240 |
//
|
|
2241 |
// Input:
|
|
2242 |
// c_rarg0 - source array address
|
|
2243 |
// c_rarg1 - destination array address
|
|
2244 |
// c_rarg2 - byte count, treated as ssize_t, can be zero
|
|
2245 |
//
|
|
2246 |
// Examines the alignment of the operands and dispatches
|
|
2247 |
// to a long, int, short, or byte copy loop.
|
|
2248 |
//
|
|
2249 |
address generate_unsafe_copy(const char *name) {
|
|
2250 |
|
|
2251 |
Label L_long_aligned, L_int_aligned, L_short_aligned;
|
|
2252 |
|
|
2253 |
// Input registers (before setup_arg_regs)
|
|
2254 |
const Register from = c_rarg0; // source array address
|
|
2255 |
const Register to = c_rarg1; // destination array address
|
|
2256 |
const Register size = c_rarg2; // byte count (size_t)
|
|
2257 |
|
|
2258 |
// Register used as a temp
|
|
2259 |
const Register bits = rax; // test copy of low bits
|
|
2260 |
|
|
2261 |
__ align(CodeEntryAlignment);
|
|
2262 |
StubCodeMark mark(this, "StubRoutines", name);
|
|
2263 |
address start = __ pc();
|
|
2264 |
|
|
2265 |
__ enter(); // required for proper stackwalking of RuntimeStub frame
|
|
2266 |
|
|
2267 |
// bump this on entry, not on exit:
|
|
2268 |
inc_counter_np(SharedRuntime::_unsafe_array_copy_ctr);
|
|
2269 |
|
|
2270 |
__ movq(bits, from);
|
|
2271 |
__ orq(bits, to);
|
|
2272 |
__ orq(bits, size);
|
|
2273 |
|
|
2274 |
__ testb(bits, BytesPerLong-1);
|
|
2275 |
__ jccb(Assembler::zero, L_long_aligned);
|
|
2276 |
|
|
2277 |
__ testb(bits, BytesPerInt-1);
|
|
2278 |
__ jccb(Assembler::zero, L_int_aligned);
|
|
2279 |
|
|
2280 |
__ testb(bits, BytesPerShort-1);
|
|
2281 |
__ jump_cc(Assembler::notZero, RuntimeAddress(byte_copy_entry));
|
|
2282 |
|
|
2283 |
__ BIND(L_short_aligned);
|
|
2284 |
__ shrq(size, LogBytesPerShort); // size => short_count
|
|
2285 |
__ jump(RuntimeAddress(short_copy_entry));
|
|
2286 |
|
|
2287 |
__ BIND(L_int_aligned);
|
|
2288 |
__ shrq(size, LogBytesPerInt); // size => int_count
|
|
2289 |
__ jump(RuntimeAddress(int_copy_entry));
|
|
2290 |
|
|
2291 |
__ BIND(L_long_aligned);
|
|
2292 |
__ shrq(size, LogBytesPerLong); // size => qword_count
|
|
2293 |
__ jump(RuntimeAddress(long_copy_entry));
|
|
2294 |
|
|
2295 |
return start;
|
|
2296 |
}
|
|
2297 |
|
|
2298 |
// Perform range checks on the proposed arraycopy.
|
|
2299 |
// Kills temp, but nothing else.
|
|
2300 |
// Also, clean the sign bits of src_pos and dst_pos.
|
|
2301 |
void arraycopy_range_checks(Register src, // source array oop (c_rarg0)
|
|
2302 |
Register src_pos, // source position (c_rarg1)
|
|
2303 |
Register dst, // destination array oo (c_rarg2)
|
|
2304 |
Register dst_pos, // destination position (c_rarg3)
|
|
2305 |
Register length,
|
|
2306 |
Register temp,
|
|
2307 |
Label& L_failed) {
|
|
2308 |
BLOCK_COMMENT("arraycopy_range_checks:");
|
|
2309 |
|
|
2310 |
// if (src_pos + length > arrayOop(src)->length()) FAIL;
|
|
2311 |
__ movl(temp, length);
|
|
2312 |
__ addl(temp, src_pos); // src_pos + length
|
|
2313 |
__ cmpl(temp, Address(src, arrayOopDesc::length_offset_in_bytes()));
|
|
2314 |
__ jcc(Assembler::above, L_failed);
|
|
2315 |
|
|
2316 |
// if (dst_pos + length > arrayOop(dst)->length()) FAIL;
|
|
2317 |
__ movl(temp, length);
|
|
2318 |
__ addl(temp, dst_pos); // dst_pos + length
|
|
2319 |
__ cmpl(temp, Address(dst, arrayOopDesc::length_offset_in_bytes()));
|
|
2320 |
__ jcc(Assembler::above, L_failed);
|
|
2321 |
|
|
2322 |
// Have to clean up high 32-bits of 'src_pos' and 'dst_pos'.
|
|
2323 |
// Move with sign extension can be used since they are positive.
|
|
2324 |
__ movslq(src_pos, src_pos);
|
|
2325 |
__ movslq(dst_pos, dst_pos);
|
|
2326 |
|
|
2327 |
BLOCK_COMMENT("arraycopy_range_checks done");
|
|
2328 |
}
|
|
2329 |
|
|
2330 |
//
|
|
2331 |
// Generate generic array copy stubs
|
|
2332 |
//
|
|
2333 |
// Input:
|
|
2334 |
// c_rarg0 - src oop
|
|
2335 |
// c_rarg1 - src_pos (32-bits)
|
|
2336 |
// c_rarg2 - dst oop
|
|
2337 |
// c_rarg3 - dst_pos (32-bits)
|
|
2338 |
// not Win64
|
|
2339 |
// c_rarg4 - element count (32-bits)
|
|
2340 |
// Win64
|
|
2341 |
// rsp+40 - element count (32-bits)
|
|
2342 |
//
|
|
2343 |
// Output:
|
|
2344 |
// rax == 0 - success
|
|
2345 |
// rax == -1^K - failure, where K is partial transfer count
|
|
2346 |
//
|
|
2347 |
address generate_generic_copy(const char *name) {
|
|
2348 |
|
|
2349 |
Label L_failed, L_failed_0, L_objArray;
|
|
2350 |
Label L_copy_bytes, L_copy_shorts, L_copy_ints, L_copy_longs;
|
|
2351 |
|
|
2352 |
// Input registers
|
|
2353 |
const Register src = c_rarg0; // source array oop
|
|
2354 |
const Register src_pos = c_rarg1; // source position
|
|
2355 |
const Register dst = c_rarg2; // destination array oop
|
|
2356 |
const Register dst_pos = c_rarg3; // destination position
|
|
2357 |
// elements count is on stack on Win64
|
|
2358 |
#ifdef _WIN64
|
|
2359 |
#define C_RARG4 Address(rsp, 6 * wordSize)
|
|
2360 |
#else
|
|
2361 |
#define C_RARG4 c_rarg4
|
|
2362 |
#endif
|
|
2363 |
|
|
2364 |
{ int modulus = CodeEntryAlignment;
|
|
2365 |
int target = modulus - 5; // 5 = sizeof jmp(L_failed)
|
|
2366 |
int advance = target - (__ offset() % modulus);
|
|
2367 |
if (advance < 0) advance += modulus;
|
|
2368 |
if (advance > 0) __ nop(advance);
|
|
2369 |
}
|
|
2370 |
StubCodeMark mark(this, "StubRoutines", name);
|
|
2371 |
|
|
2372 |
// Short-hop target to L_failed. Makes for denser prologue code.
|
|
2373 |
__ BIND(L_failed_0);
|
|
2374 |
__ jmp(L_failed);
|
|
2375 |
assert(__ offset() % CodeEntryAlignment == 0, "no further alignment needed");
|
|
2376 |
|
|
2377 |
__ align(CodeEntryAlignment);
|
|
2378 |
address start = __ pc();
|
|
2379 |
|
|
2380 |
__ enter(); // required for proper stackwalking of RuntimeStub frame
|
|
2381 |
|
|
2382 |
// bump this on entry, not on exit:
|
|
2383 |
inc_counter_np(SharedRuntime::_generic_array_copy_ctr);
|
|
2384 |
|
|
2385 |
//-----------------------------------------------------------------------
|
|
2386 |
// Assembler stub will be used for this call to arraycopy
|
|
2387 |
// if the following conditions are met:
|
|
2388 |
//
|
|
2389 |
// (1) src and dst must not be null.
|
|
2390 |
// (2) src_pos must not be negative.
|
|
2391 |
// (3) dst_pos must not be negative.
|
|
2392 |
// (4) length must not be negative.
|
|
2393 |
// (5) src klass and dst klass should be the same and not NULL.
|
|
2394 |
// (6) src and dst should be arrays.
|
|
2395 |
// (7) src_pos + length must not exceed length of src.
|
|
2396 |
// (8) dst_pos + length must not exceed length of dst.
|
|
2397 |
//
|
|
2398 |
|
|
2399 |
// if (src == NULL) return -1;
|
|
2400 |
__ testq(src, src); // src oop
|
|
2401 |
size_t j1off = __ offset();
|
|
2402 |
__ jccb(Assembler::zero, L_failed_0);
|
|
2403 |
|
|
2404 |
// if (src_pos < 0) return -1;
|
|
2405 |
__ testl(src_pos, src_pos); // src_pos (32-bits)
|
|
2406 |
__ jccb(Assembler::negative, L_failed_0);
|
|
2407 |
|
|
2408 |
// if (dst == NULL) return -1;
|
|
2409 |
__ testq(dst, dst); // dst oop
|
|
2410 |
__ jccb(Assembler::zero, L_failed_0);
|
|
2411 |
|
|
2412 |
// if (dst_pos < 0) return -1;
|
|
2413 |
__ testl(dst_pos, dst_pos); // dst_pos (32-bits)
|
|
2414 |
size_t j4off = __ offset();
|
|
2415 |
__ jccb(Assembler::negative, L_failed_0);
|
|
2416 |
|
|
2417 |
// The first four tests are very dense code,
|
|
2418 |
// but not quite dense enough to put four
|
|
2419 |
// jumps in a 16-byte instruction fetch buffer.
|
|
2420 |
// That's good, because some branch predicters
|
|
2421 |
// do not like jumps so close together.
|
|
2422 |
// Make sure of this.
|
|
2423 |
guarantee(((j1off ^ j4off) & ~15) != 0, "I$ line of 1st & 4th jumps");
|
|
2424 |
|
|
2425 |
// registers used as temp
|
|
2426 |
const Register r11_length = r11; // elements count to copy
|
|
2427 |
const Register r10_src_klass = r10; // array klass
|
|
2428 |
|
|
2429 |
// if (length < 0) return -1;
|
|
2430 |
__ movl(r11_length, C_RARG4); // length (elements count, 32-bits value)
|
|
2431 |
__ testl(r11_length, r11_length);
|
|
2432 |
__ jccb(Assembler::negative, L_failed_0);
|
|
2433 |
|
|
2434 |
Address src_klass_addr(src, oopDesc::klass_offset_in_bytes());
|
|
2435 |
Address dst_klass_addr(dst, oopDesc::klass_offset_in_bytes());
|
|
2436 |
__ movq(r10_src_klass, src_klass_addr);
|
|
2437 |
#ifdef ASSERT
|
|
2438 |
// assert(src->klass() != NULL);
|
|
2439 |
BLOCK_COMMENT("assert klasses not null");
|
|
2440 |
{ Label L1, L2;
|
|
2441 |
__ testq(r10_src_klass, r10_src_klass);
|
|
2442 |
__ jcc(Assembler::notZero, L2); // it is broken if klass is NULL
|
|
2443 |
__ bind(L1);
|
|
2444 |
__ stop("broken null klass");
|
|
2445 |
__ bind(L2);
|
|
2446 |
__ cmpq(dst_klass_addr, 0);
|
|
2447 |
__ jcc(Assembler::equal, L1); // this would be broken also
|
|
2448 |
BLOCK_COMMENT("assert done");
|
|
2449 |
}
|
|
2450 |
#endif
|
|
2451 |
|
|
2452 |
// Load layout helper (32-bits)
|
|
2453 |
//
|
|
2454 |
// |array_tag| | header_size | element_type | |log2_element_size|
|
|
2455 |
// 32 30 24 16 8 2 0
|
|
2456 |
//
|
|
2457 |
// array_tag: typeArray = 0x3, objArray = 0x2, non-array = 0x0
|
|
2458 |
//
|
|
2459 |
|
|
2460 |
int lh_offset = klassOopDesc::header_size() * HeapWordSize +
|
|
2461 |
Klass::layout_helper_offset_in_bytes();
|
|
2462 |
|
|
2463 |
const Register rax_lh = rax; // layout helper
|
|
2464 |
|
|
2465 |
__ movl(rax_lh, Address(r10_src_klass, lh_offset));
|
|
2466 |
|
|
2467 |
// Handle objArrays completely differently...
|
|
2468 |
jint objArray_lh = Klass::array_layout_helper(T_OBJECT);
|
|
2469 |
__ cmpl(rax_lh, objArray_lh);
|
|
2470 |
__ jcc(Assembler::equal, L_objArray);
|
|
2471 |
|
|
2472 |
// if (src->klass() != dst->klass()) return -1;
|
|
2473 |
__ cmpq(r10_src_klass, dst_klass_addr);
|
|
2474 |
__ jcc(Assembler::notEqual, L_failed);
|
|
2475 |
|
|
2476 |
// if (!src->is_Array()) return -1;
|
|
2477 |
__ cmpl(rax_lh, Klass::_lh_neutral_value);
|
|
2478 |
__ jcc(Assembler::greaterEqual, L_failed);
|
|
2479 |
|
|
2480 |
// At this point, it is known to be a typeArray (array_tag 0x3).
|
|
2481 |
#ifdef ASSERT
|
|
2482 |
{ Label L;
|
|
2483 |
__ cmpl(rax_lh, (Klass::_lh_array_tag_type_value << Klass::_lh_array_tag_shift));
|
|
2484 |
__ jcc(Assembler::greaterEqual, L);
|
|
2485 |
__ stop("must be a primitive array");
|
|
2486 |
__ bind(L);
|
|
2487 |
}
|
|
2488 |
#endif
|
|
2489 |
|
|
2490 |
arraycopy_range_checks(src, src_pos, dst, dst_pos, r11_length,
|
|
2491 |
r10, L_failed);
|
|
2492 |
|
|
2493 |
// typeArrayKlass
|
|
2494 |
//
|
|
2495 |
// src_addr = (src + array_header_in_bytes()) + (src_pos << log2elemsize);
|
|
2496 |
// dst_addr = (dst + array_header_in_bytes()) + (dst_pos << log2elemsize);
|
|
2497 |
//
|
|
2498 |
|
|
2499 |
const Register r10_offset = r10; // array offset
|
|
2500 |
const Register rax_elsize = rax_lh; // element size
|
|
2501 |
|
|
2502 |
__ movl(r10_offset, rax_lh);
|
|
2503 |
__ shrl(r10_offset, Klass::_lh_header_size_shift);
|
|
2504 |
__ andq(r10_offset, Klass::_lh_header_size_mask); // array_offset
|
|
2505 |
__ addq(src, r10_offset); // src array offset
|
|
2506 |
__ addq(dst, r10_offset); // dst array offset
|
|
2507 |
BLOCK_COMMENT("choose copy loop based on element size");
|
|
2508 |
__ andl(rax_lh, Klass::_lh_log2_element_size_mask); // rax_lh -> rax_elsize
|
|
2509 |
|
|
2510 |
// next registers should be set before the jump to corresponding stub
|
|
2511 |
const Register from = c_rarg0; // source array address
|
|
2512 |
const Register to = c_rarg1; // destination array address
|
|
2513 |
const Register count = c_rarg2; // elements count
|
|
2514 |
|
|
2515 |
// 'from', 'to', 'count' registers should be set in such order
|
|
2516 |
// since they are the same as 'src', 'src_pos', 'dst'.
|
|
2517 |
|
|
2518 |
__ BIND(L_copy_bytes);
|
|
2519 |
__ cmpl(rax_elsize, 0);
|
|
2520 |
__ jccb(Assembler::notEqual, L_copy_shorts);
|
|
2521 |
__ leaq(from, Address(src, src_pos, Address::times_1, 0));// src_addr
|
|
2522 |
__ leaq(to, Address(dst, dst_pos, Address::times_1, 0));// dst_addr
|
|
2523 |
__ movslq(count, r11_length); // length
|
|
2524 |
__ jump(RuntimeAddress(byte_copy_entry));
|
|
2525 |
|
|
2526 |
__ BIND(L_copy_shorts);
|
|
2527 |
__ cmpl(rax_elsize, LogBytesPerShort);
|
|
2528 |
__ jccb(Assembler::notEqual, L_copy_ints);
|
|
2529 |
__ leaq(from, Address(src, src_pos, Address::times_2, 0));// src_addr
|
|
2530 |
__ leaq(to, Address(dst, dst_pos, Address::times_2, 0));// dst_addr
|
|
2531 |
__ movslq(count, r11_length); // length
|
|
2532 |
__ jump(RuntimeAddress(short_copy_entry));
|
|
2533 |
|
|
2534 |
__ BIND(L_copy_ints);
|
|
2535 |
__ cmpl(rax_elsize, LogBytesPerInt);
|
|
2536 |
__ jccb(Assembler::notEqual, L_copy_longs);
|
|
2537 |
__ leaq(from, Address(src, src_pos, Address::times_4, 0));// src_addr
|
|
2538 |
__ leaq(to, Address(dst, dst_pos, Address::times_4, 0));// dst_addr
|
|
2539 |
__ movslq(count, r11_length); // length
|
|
2540 |
__ jump(RuntimeAddress(int_copy_entry));
|
|
2541 |
|
|
2542 |
__ BIND(L_copy_longs);
|
|
2543 |
#ifdef ASSERT
|
|
2544 |
{ Label L;
|
|
2545 |
__ cmpl(rax_elsize, LogBytesPerLong);
|
|
2546 |
__ jcc(Assembler::equal, L);
|
|
2547 |
__ stop("must be long copy, but elsize is wrong");
|
|
2548 |
__ bind(L);
|
|
2549 |
}
|
|
2550 |
#endif
|
|
2551 |
__ leaq(from, Address(src, src_pos, Address::times_8, 0));// src_addr
|
|
2552 |
__ leaq(to, Address(dst, dst_pos, Address::times_8, 0));// dst_addr
|
|
2553 |
__ movslq(count, r11_length); // length
|
|
2554 |
__ jump(RuntimeAddress(long_copy_entry));
|
|
2555 |
|
|
2556 |
// objArrayKlass
|
|
2557 |
__ BIND(L_objArray);
|
|
2558 |
// live at this point: r10_src_klass, src[_pos], dst[_pos]
|
|
2559 |
|
|
2560 |
Label L_plain_copy, L_checkcast_copy;
|
|
2561 |
// test array classes for subtyping
|
|
2562 |
__ cmpq(r10_src_klass, dst_klass_addr); // usual case is exact equality
|
|
2563 |
__ jcc(Assembler::notEqual, L_checkcast_copy);
|
|
2564 |
|
|
2565 |
// Identically typed arrays can be copied without element-wise checks.
|
|
2566 |
arraycopy_range_checks(src, src_pos, dst, dst_pos, r11_length,
|
|
2567 |
r10, L_failed);
|
|
2568 |
|
|
2569 |
__ leaq(from, Address(src, src_pos, Address::times_8,
|
|
2570 |
arrayOopDesc::base_offset_in_bytes(T_OBJECT))); // src_addr
|
|
2571 |
__ leaq(to, Address(dst, dst_pos, Address::times_8,
|
|
2572 |
arrayOopDesc::base_offset_in_bytes(T_OBJECT))); // dst_addr
|
|
2573 |
__ movslq(count, r11_length); // length
|
|
2574 |
__ BIND(L_plain_copy);
|
|
2575 |
__ jump(RuntimeAddress(oop_copy_entry));
|
|
2576 |
|
|
2577 |
__ BIND(L_checkcast_copy);
|
|
2578 |
// live at this point: r10_src_klass, !r11_length
|
|
2579 |
{
|
|
2580 |
// assert(r11_length == C_RARG4); // will reload from here
|
|
2581 |
Register r11_dst_klass = r11;
|
|
2582 |
__ movq(r11_dst_klass, dst_klass_addr);
|
|
2583 |
|
|
2584 |
// Before looking at dst.length, make sure dst is also an objArray.
|
|
2585 |
__ cmpl(Address(r11_dst_klass, lh_offset), objArray_lh);
|
|
2586 |
__ jcc(Assembler::notEqual, L_failed);
|
|
2587 |
|
|
2588 |
// It is safe to examine both src.length and dst.length.
|
|
2589 |
#ifndef _WIN64
|
|
2590 |
arraycopy_range_checks(src, src_pos, dst, dst_pos, C_RARG4,
|
|
2591 |
rax, L_failed);
|
|
2592 |
#else
|
|
2593 |
__ movl(r11_length, C_RARG4); // reload
|
|
2594 |
arraycopy_range_checks(src, src_pos, dst, dst_pos, r11_length,
|
|
2595 |
rax, L_failed);
|
|
2596 |
__ movl(r11_dst_klass, dst_klass_addr); // reload
|
|
2597 |
#endif
|
|
2598 |
|
|
2599 |
// Marshal the base address arguments now, freeing registers.
|
|
2600 |
__ leaq(from, Address(src, src_pos, Address::times_8,
|
|
2601 |
arrayOopDesc::base_offset_in_bytes(T_OBJECT)));
|
|
2602 |
__ leaq(to, Address(dst, dst_pos, Address::times_8,
|
|
2603 |
arrayOopDesc::base_offset_in_bytes(T_OBJECT)));
|
|
2604 |
__ movl(count, C_RARG4); // length (reloaded)
|
|
2605 |
Register sco_temp = c_rarg3; // this register is free now
|
|
2606 |
assert_different_registers(from, to, count, sco_temp,
|
|
2607 |
r11_dst_klass, r10_src_klass);
|
|
2608 |
assert_clean_int(count, sco_temp);
|
|
2609 |
|
|
2610 |
// Generate the type check.
|
|
2611 |
int sco_offset = (klassOopDesc::header_size() * HeapWordSize +
|
|
2612 |
Klass::super_check_offset_offset_in_bytes());
|
|
2613 |
__ movl(sco_temp, Address(r11_dst_klass, sco_offset));
|
|
2614 |
assert_clean_int(sco_temp, rax);
|
|
2615 |
generate_type_check(r10_src_klass, sco_temp, r11_dst_klass, L_plain_copy);
|
|
2616 |
|
|
2617 |
// Fetch destination element klass from the objArrayKlass header.
|
|
2618 |
int ek_offset = (klassOopDesc::header_size() * HeapWordSize +
|
|
2619 |
objArrayKlass::element_klass_offset_in_bytes());
|
|
2620 |
__ movq(r11_dst_klass, Address(r11_dst_klass, ek_offset));
|
|
2621 |
__ movl(sco_temp, Address(r11_dst_klass, sco_offset));
|
|
2622 |
assert_clean_int(sco_temp, rax);
|
|
2623 |
|
|
2624 |
// the checkcast_copy loop needs two extra arguments:
|
|
2625 |
assert(c_rarg3 == sco_temp, "#3 already in place");
|
|
2626 |
__ movq(C_RARG4, r11_dst_klass); // dst.klass.element_klass
|
|
2627 |
__ jump(RuntimeAddress(checkcast_copy_entry));
|
|
2628 |
}
|
|
2629 |
|
|
2630 |
__ BIND(L_failed);
|
|
2631 |
__ xorq(rax, rax);
|
|
2632 |
__ notq(rax); // return -1
|
|
2633 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
2634 |
__ ret(0);
|
|
2635 |
|
|
2636 |
return start;
|
|
2637 |
}
|
|
2638 |
|
|
2639 |
#undef length_arg
|
|
2640 |
|
|
2641 |
void generate_arraycopy_stubs() {
|
|
2642 |
// Call the conjoint generation methods immediately after
|
|
2643 |
// the disjoint ones so that short branches from the former
|
|
2644 |
// to the latter can be generated.
|
|
2645 |
StubRoutines::_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(false, "jbyte_disjoint_arraycopy");
|
|
2646 |
StubRoutines::_jbyte_arraycopy = generate_conjoint_byte_copy(false, "jbyte_arraycopy");
|
|
2647 |
|
|
2648 |
StubRoutines::_jshort_disjoint_arraycopy = generate_disjoint_short_copy(false, "jshort_disjoint_arraycopy");
|
|
2649 |
StubRoutines::_jshort_arraycopy = generate_conjoint_short_copy(false, "jshort_arraycopy");
|
|
2650 |
|
|
2651 |
StubRoutines::_jint_disjoint_arraycopy = generate_disjoint_int_copy(false, "jint_disjoint_arraycopy");
|
|
2652 |
StubRoutines::_jint_arraycopy = generate_conjoint_int_copy(false, "jint_arraycopy");
|
|
2653 |
|
|
2654 |
StubRoutines::_jlong_disjoint_arraycopy = generate_disjoint_long_oop_copy(false, false, "jlong_disjoint_arraycopy");
|
|
2655 |
StubRoutines::_jlong_arraycopy = generate_conjoint_long_oop_copy(false, false, "jlong_arraycopy");
|
|
2656 |
|
|
2657 |
StubRoutines::_oop_disjoint_arraycopy = generate_disjoint_long_oop_copy(false, true, "oop_disjoint_arraycopy");
|
|
2658 |
StubRoutines::_oop_arraycopy = generate_conjoint_long_oop_copy(false, true, "oop_arraycopy");
|
|
2659 |
|
|
2660 |
StubRoutines::_checkcast_arraycopy = generate_checkcast_copy("checkcast_arraycopy");
|
|
2661 |
StubRoutines::_unsafe_arraycopy = generate_unsafe_copy("unsafe_arraycopy");
|
|
2662 |
StubRoutines::_generic_arraycopy = generate_generic_copy("generic_arraycopy");
|
|
2663 |
|
|
2664 |
// We don't generate specialized code for HeapWord-aligned source
|
|
2665 |
// arrays, so just use the code we've already generated
|
|
2666 |
StubRoutines::_arrayof_jbyte_disjoint_arraycopy = StubRoutines::_jbyte_disjoint_arraycopy;
|
|
2667 |
StubRoutines::_arrayof_jbyte_arraycopy = StubRoutines::_jbyte_arraycopy;
|
|
2668 |
|
|
2669 |
StubRoutines::_arrayof_jshort_disjoint_arraycopy = StubRoutines::_jshort_disjoint_arraycopy;
|
|
2670 |
StubRoutines::_arrayof_jshort_arraycopy = StubRoutines::_jshort_arraycopy;
|
|
2671 |
|
|
2672 |
StubRoutines::_arrayof_jint_disjoint_arraycopy = StubRoutines::_jint_disjoint_arraycopy;
|
|
2673 |
StubRoutines::_arrayof_jint_arraycopy = StubRoutines::_jint_arraycopy;
|
|
2674 |
|
|
2675 |
StubRoutines::_arrayof_jlong_disjoint_arraycopy = StubRoutines::_jlong_disjoint_arraycopy;
|
|
2676 |
StubRoutines::_arrayof_jlong_arraycopy = StubRoutines::_jlong_arraycopy;
|
|
2677 |
|
|
2678 |
StubRoutines::_arrayof_oop_disjoint_arraycopy = StubRoutines::_oop_disjoint_arraycopy;
|
|
2679 |
StubRoutines::_arrayof_oop_arraycopy = StubRoutines::_oop_arraycopy;
|
|
2680 |
}
|
|
2681 |
|
|
2682 |
#undef __
|
|
2683 |
#define __ masm->
|
|
2684 |
|
|
2685 |
// Continuation point for throwing of implicit exceptions that are
|
|
2686 |
// not handled in the current activation. Fabricates an exception
|
|
2687 |
// oop and initiates normal exception dispatching in this
|
|
2688 |
// frame. Since we need to preserve callee-saved values (currently
|
|
2689 |
// only for C2, but done for C1 as well) we need a callee-saved oop
|
|
2690 |
// map and therefore have to make these stubs into RuntimeStubs
|
|
2691 |
// rather than BufferBlobs. If the compiler needs all registers to
|
|
2692 |
// be preserved between the fault point and the exception handler
|
|
2693 |
// then it must assume responsibility for that in
|
|
2694 |
// AbstractCompiler::continuation_for_implicit_null_exception or
|
|
2695 |
// continuation_for_implicit_division_by_zero_exception. All other
|
|
2696 |
// implicit exceptions (e.g., NullPointerException or
|
|
2697 |
// AbstractMethodError on entry) are either at call sites or
|
|
2698 |
// otherwise assume that stack unwinding will be initiated, so
|
|
2699 |
// caller saved registers were assumed volatile in the compiler.
|
|
2700 |
address generate_throw_exception(const char* name,
|
|
2701 |
address runtime_entry,
|
|
2702 |
bool restore_saved_exception_pc) {
|
|
2703 |
// Information about frame layout at time of blocking runtime call.
|
|
2704 |
// Note that we only have to preserve callee-saved registers since
|
|
2705 |
// the compilers are responsible for supplying a continuation point
|
|
2706 |
// if they expect all registers to be preserved.
|
|
2707 |
enum layout {
|
|
2708 |
rbp_off = frame::arg_reg_save_area_bytes/BytesPerInt,
|
|
2709 |
rbp_off2,
|
|
2710 |
return_off,
|
|
2711 |
return_off2,
|
|
2712 |
framesize // inclusive of return address
|
|
2713 |
};
|
|
2714 |
|
|
2715 |
int insts_size = 512;
|
|
2716 |
int locs_size = 64;
|
|
2717 |
|
|
2718 |
CodeBuffer code(name, insts_size, locs_size);
|
|
2719 |
OopMapSet* oop_maps = new OopMapSet();
|
|
2720 |
MacroAssembler* masm = new MacroAssembler(&code);
|
|
2721 |
|
|
2722 |
address start = __ pc();
|
|
2723 |
|
|
2724 |
// This is an inlined and slightly modified version of call_VM
|
|
2725 |
// which has the ability to fetch the return PC out of
|
|
2726 |
// thread-local storage and also sets up last_Java_sp slightly
|
|
2727 |
// differently than the real call_VM
|
|
2728 |
if (restore_saved_exception_pc) {
|
|
2729 |
__ movq(rax,
|
|
2730 |
Address(r15_thread,
|
|
2731 |
in_bytes(JavaThread::saved_exception_pc_offset())));
|
|
2732 |
__ pushq(rax);
|
|
2733 |
}
|
|
2734 |
|
|
2735 |
__ enter(); // required for proper stackwalking of RuntimeStub frame
|
|
2736 |
|
|
2737 |
assert(is_even(framesize/2), "sp not 16-byte aligned");
|
|
2738 |
|
|
2739 |
// return address and rbp are already in place
|
|
2740 |
__ subq(rsp, (framesize-4) << LogBytesPerInt); // prolog
|
|
2741 |
|
|
2742 |
int frame_complete = __ pc() - start;
|
|
2743 |
|
|
2744 |
// Set up last_Java_sp and last_Java_fp
|
|
2745 |
__ set_last_Java_frame(rsp, rbp, NULL);
|
|
2746 |
|
|
2747 |
// Call runtime
|
|
2748 |
__ movq(c_rarg0, r15_thread);
|
|
2749 |
BLOCK_COMMENT("call runtime_entry");
|
|
2750 |
__ call(RuntimeAddress(runtime_entry));
|
|
2751 |
|
|
2752 |
// Generate oop map
|
|
2753 |
OopMap* map = new OopMap(framesize, 0);
|
|
2754 |
|
|
2755 |
oop_maps->add_gc_map(__ pc() - start, map);
|
|
2756 |
|
|
2757 |
__ reset_last_Java_frame(true, false);
|
|
2758 |
|
|
2759 |
__ leave(); // required for proper stackwalking of RuntimeStub frame
|
|
2760 |
|
|
2761 |
// check for pending exceptions
|
|
2762 |
#ifdef ASSERT
|
|
2763 |
Label L;
|
|
2764 |
__ cmpq(Address(r15_thread, Thread::pending_exception_offset()),
|
|
2765 |
(int) NULL);
|
|
2766 |
__ jcc(Assembler::notEqual, L);
|
|
2767 |
__ should_not_reach_here();
|
|
2768 |
__ bind(L);
|
|
2769 |
#endif // ASSERT
|
|
2770 |
__ jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
|
|
2771 |
|
|
2772 |
|
|
2773 |
// codeBlob framesize is in words (not VMRegImpl::slot_size)
|
|
2774 |
RuntimeStub* stub =
|
|
2775 |
RuntimeStub::new_runtime_stub(name,
|
|
2776 |
&code,
|
|
2777 |
frame_complete,
|
|
2778 |
(framesize >> (LogBytesPerWord - LogBytesPerInt)),
|
|
2779 |
oop_maps, false);
|
|
2780 |
return stub->entry_point();
|
|
2781 |
}
|
|
2782 |
|
|
2783 |
// Initialization
|
|
2784 |
void generate_initial() {
|
|
2785 |
// Generates all stubs and initializes the entry points
|
|
2786 |
|
|
2787 |
// This platform-specific stub is needed by generate_call_stub()
|
|
2788 |
StubRoutines::amd64::_mxcsr_std = generate_fp_mask("mxcsr_std", 0x0000000000001F80);
|
|
2789 |
|
|
2790 |
// entry points that exist in all platforms Note: This is code
|
|
2791 |
// that could be shared among different platforms - however the
|
|
2792 |
// benefit seems to be smaller than the disadvantage of having a
|
|
2793 |
// much more complicated generator structure. See also comment in
|
|
2794 |
// stubRoutines.hpp.
|
|
2795 |
|
|
2796 |
StubRoutines::_forward_exception_entry = generate_forward_exception();
|
|
2797 |
|
|
2798 |
StubRoutines::_call_stub_entry =
|
|
2799 |
generate_call_stub(StubRoutines::_call_stub_return_address);
|
|
2800 |
|
|
2801 |
// is referenced by megamorphic call
|
|
2802 |
StubRoutines::_catch_exception_entry = generate_catch_exception();
|
|
2803 |
|
|
2804 |
// atomic calls
|
|
2805 |
StubRoutines::_atomic_xchg_entry = generate_atomic_xchg();
|
|
2806 |
StubRoutines::_atomic_xchg_ptr_entry = generate_atomic_xchg_ptr();
|
|
2807 |
StubRoutines::_atomic_cmpxchg_entry = generate_atomic_cmpxchg();
|
|
2808 |
StubRoutines::_atomic_cmpxchg_long_entry = generate_atomic_cmpxchg_long();
|
|
2809 |
StubRoutines::_atomic_add_entry = generate_atomic_add();
|
|
2810 |
StubRoutines::_atomic_add_ptr_entry = generate_atomic_add_ptr();
|
|
2811 |
StubRoutines::_fence_entry = generate_orderaccess_fence();
|
|
2812 |
|
|
2813 |
StubRoutines::_handler_for_unsafe_access_entry =
|
|
2814 |
generate_handler_for_unsafe_access();
|
|
2815 |
|
|
2816 |
// platform dependent
|
|
2817 |
StubRoutines::amd64::_get_previous_fp_entry = generate_get_previous_fp();
|
|
2818 |
|
|
2819 |
StubRoutines::amd64::_verify_mxcsr_entry = generate_verify_mxcsr();
|
|
2820 |
}
|
|
2821 |
|
|
2822 |
void generate_all() {
|
|
2823 |
// Generates all stubs and initializes the entry points
|
|
2824 |
|
|
2825 |
// These entry points require SharedInfo::stack0 to be set up in
|
|
2826 |
// non-core builds and need to be relocatable, so they each
|
|
2827 |
// fabricate a RuntimeStub internally.
|
|
2828 |
StubRoutines::_throw_AbstractMethodError_entry =
|
|
2829 |
generate_throw_exception("AbstractMethodError throw_exception",
|
|
2830 |
CAST_FROM_FN_PTR(address,
|
|
2831 |
SharedRuntime::
|
|
2832 |
throw_AbstractMethodError),
|
|
2833 |
false);
|
|
2834 |
|
|
2835 |
StubRoutines::_throw_ArithmeticException_entry =
|
|
2836 |
generate_throw_exception("ArithmeticException throw_exception",
|
|
2837 |
CAST_FROM_FN_PTR(address,
|
|
2838 |
SharedRuntime::
|
|
2839 |
throw_ArithmeticException),
|
|
2840 |
true);
|
|
2841 |
|
|
2842 |
StubRoutines::_throw_NullPointerException_entry =
|
|
2843 |
generate_throw_exception("NullPointerException throw_exception",
|
|
2844 |
CAST_FROM_FN_PTR(address,
|
|
2845 |
SharedRuntime::
|
|
2846 |
throw_NullPointerException),
|
|
2847 |
true);
|
|
2848 |
|
|
2849 |
StubRoutines::_throw_NullPointerException_at_call_entry =
|
|
2850 |
generate_throw_exception("NullPointerException at call throw_exception",
|
|
2851 |
CAST_FROM_FN_PTR(address,
|
|
2852 |
SharedRuntime::
|
|
2853 |
throw_NullPointerException_at_call),
|
|
2854 |
false);
|
|
2855 |
|
|
2856 |
StubRoutines::_throw_StackOverflowError_entry =
|
|
2857 |
generate_throw_exception("StackOverflowError throw_exception",
|
|
2858 |
CAST_FROM_FN_PTR(address,
|
|
2859 |
SharedRuntime::
|
|
2860 |
throw_StackOverflowError),
|
|
2861 |
false);
|
|
2862 |
|
|
2863 |
// entry points that are platform specific
|
|
2864 |
StubRoutines::amd64::_f2i_fixup = generate_f2i_fixup();
|
|
2865 |
StubRoutines::amd64::_f2l_fixup = generate_f2l_fixup();
|
|
2866 |
StubRoutines::amd64::_d2i_fixup = generate_d2i_fixup();
|
|
2867 |
StubRoutines::amd64::_d2l_fixup = generate_d2l_fixup();
|
|
2868 |
|
|
2869 |
StubRoutines::amd64::_float_sign_mask = generate_fp_mask("float_sign_mask", 0x7FFFFFFF7FFFFFFF);
|
|
2870 |
StubRoutines::amd64::_float_sign_flip = generate_fp_mask("float_sign_flip", 0x8000000080000000);
|
|
2871 |
StubRoutines::amd64::_double_sign_mask = generate_fp_mask("double_sign_mask", 0x7FFFFFFFFFFFFFFF);
|
|
2872 |
StubRoutines::amd64::_double_sign_flip = generate_fp_mask("double_sign_flip", 0x8000000000000000);
|
|
2873 |
|
|
2874 |
// support for verify_oop (must happen after universe_init)
|
|
2875 |
StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop();
|
|
2876 |
|
|
2877 |
// arraycopy stubs used by compilers
|
|
2878 |
generate_arraycopy_stubs();
|
|
2879 |
}
|
|
2880 |
|
|
2881 |
public:
|
|
2882 |
StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) {
|
|
2883 |
if (all) {
|
|
2884 |
generate_all();
|
|
2885 |
} else {
|
|
2886 |
generate_initial();
|
|
2887 |
}
|
|
2888 |
}
|
|
2889 |
}; // end class declaration
|
|
2890 |
|
|
2891 |
address StubGenerator::disjoint_byte_copy_entry = NULL;
|
|
2892 |
address StubGenerator::disjoint_short_copy_entry = NULL;
|
|
2893 |
address StubGenerator::disjoint_int_copy_entry = NULL;
|
|
2894 |
address StubGenerator::disjoint_long_copy_entry = NULL;
|
|
2895 |
address StubGenerator::disjoint_oop_copy_entry = NULL;
|
|
2896 |
|
|
2897 |
address StubGenerator::byte_copy_entry = NULL;
|
|
2898 |
address StubGenerator::short_copy_entry = NULL;
|
|
2899 |
address StubGenerator::int_copy_entry = NULL;
|
|
2900 |
address StubGenerator::long_copy_entry = NULL;
|
|
2901 |
address StubGenerator::oop_copy_entry = NULL;
|
|
2902 |
|
|
2903 |
address StubGenerator::checkcast_copy_entry = NULL;
|
|
2904 |
|
|
2905 |
void StubGenerator_generate(CodeBuffer* code, bool all) {
|
|
2906 |
StubGenerator g(code, all);
|
|
2907 |
}
|