1 /*
2 * Copyright (c) 1999, 2021, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/assembler.hpp"
27 #include "c1/c1_Defs.hpp"
28 #include "c1/c1_MacroAssembler.hpp"
29 #include "c1/c1_Runtime1.hpp"
30 #include "ci/ciUtilities.hpp"
31 #include "compiler/oopMap.hpp"
32 #include "gc/shared/cardTable.hpp"
33 #include "gc/shared/cardTableBarrierSet.hpp"
34 #include "gc/shared/collectedHeap.hpp"
35 #include "gc/shared/tlab_globals.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "memory/universe.hpp"
38 #include "nativeInst_x86.hpp"
39 #include "oops/compiledICHolder.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "prims/jvmtiExport.hpp"
42 #include "register_x86.hpp"
43 #include "runtime/sharedRuntime.hpp"
44 #include "runtime/signature.hpp"
45 #include "runtime/stubRoutines.hpp"
46 #include "runtime/vframeArray.hpp"
47 #include "utilities/macros.hpp"
48 #include "vmreg_x86.inline.hpp"
49
50 // Implementation of StubAssembler
51
52 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, int args_size) {
53 // setup registers
54 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread); // is callee-saved register (Visual C++ calling conventions)
55 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) || oop_result1 != metadata_result, "registers must be different");
56 assert(oop_result1 != thread && metadata_result != thread, "registers must be different");
57 assert(args_size >= 0, "illegal args_size");
58 bool align_stack = false;
59 #ifdef _LP64
60 // At a method handle call, the stack may not be properly aligned
61 // when returning with an exception.
62 align_stack = (stub_id() == Runtime1::handle_exception_from_callee_id);
63 #endif
64
65 #ifdef _LP64
66 mov(c_rarg0, thread);
67 set_num_rt_args(0); // Nothing on stack
68 #else
69 set_num_rt_args(1 + args_size);
70
71 // push java thread (becomes first argument of C function)
72 get_thread(thread);
73 push(thread);
74 #endif // _LP64
75
76 int call_offset = -1;
77 if (!align_stack) {
78 set_last_Java_frame(thread, noreg, rbp, NULL);
79 } else {
80 address the_pc = pc();
81 call_offset = offset();
82 set_last_Java_frame(thread, noreg, rbp, the_pc);
83 andptr(rsp, -(StackAlignmentInBytes)); // Align stack
84 }
85
86 // do the call
87 call(RuntimeAddress(entry));
88 if (!align_stack) {
89 call_offset = offset();
90 }
91 // verify callee-saved register
92 #ifdef ASSERT
93 guarantee(thread != rax, "change this code");
94 push(rax);
95 { Label L;
96 get_thread(rax);
97 cmpptr(thread, rax);
98 jcc(Assembler::equal, L);
99 int3();
100 stop("StubAssembler::call_RT: rdi not callee saved?");
101 bind(L);
102 }
103 pop(rax);
104 #endif
105 reset_last_Java_frame(thread, true);
106
107 // discard thread and arguments
108 NOT_LP64(addptr(rsp, num_rt_args()*BytesPerWord));
109
110 // check for pending exceptions
111 { Label L;
112 cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
113 jcc(Assembler::equal, L);
114 // exception pending => remove activation and forward to exception handler
115 movptr(rax, Address(thread, Thread::pending_exception_offset()));
116 // make sure that the vm_results are cleared
117 if (oop_result1->is_valid()) {
118 movptr(Address(thread, JavaThread::vm_result_offset()), NULL_WORD);
119 }
120 if (metadata_result->is_valid()) {
121 movptr(Address(thread, JavaThread::vm_result_2_offset()), NULL_WORD);
122 }
123 if (frame_size() == no_frame_size) {
124 leave();
125 jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
126 } else if (_stub_id == Runtime1::forward_exception_id) {
127 should_not_reach_here();
128 } else {
129 jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
130 }
131 bind(L);
132 }
133 // get oop results if there are any and reset the values in the thread
134 if (oop_result1->is_valid()) {
135 get_vm_result(oop_result1, thread);
136 }
137 if (metadata_result->is_valid()) {
138 get_vm_result_2(metadata_result, thread);
139 }
140
141 assert(call_offset >= 0, "Should be set");
142 return call_offset;
143 }
144
145
146 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
147 #ifdef _LP64
148 mov(c_rarg1, arg1);
149 #else
150 push(arg1);
151 #endif // _LP64
152 return call_RT(oop_result1, metadata_result, entry, 1);
153 }
154
155
156 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
157 #ifdef _LP64
158 if (c_rarg1 == arg2) {
159 if (c_rarg2 == arg1) {
160 xchgq(arg1, arg2);
161 } else {
162 mov(c_rarg2, arg2);
163 mov(c_rarg1, arg1);
164 }
165 } else {
166 mov(c_rarg1, arg1);
167 mov(c_rarg2, arg2);
168 }
169 #else
170 push(arg2);
171 push(arg1);
172 #endif // _LP64
173 return call_RT(oop_result1, metadata_result, entry, 2);
174 }
175
176
177 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
178 #ifdef _LP64
179 // if there is any conflict use the stack
180 if (arg1 == c_rarg2 || arg1 == c_rarg3 ||
181 arg2 == c_rarg1 || arg2 == c_rarg3 ||
182 arg3 == c_rarg1 || arg3 == c_rarg2) {
183 push(arg3);
184 push(arg2);
185 push(arg1);
186 pop(c_rarg1);
187 pop(c_rarg2);
188 pop(c_rarg3);
189 } else {
190 mov(c_rarg1, arg1);
191 mov(c_rarg2, arg2);
192 mov(c_rarg3, arg3);
193 }
194 #else
195 push(arg3);
196 push(arg2);
197 push(arg1);
198 #endif // _LP64
199 return call_RT(oop_result1, metadata_result, entry, 3);
200 }
201
202
203 // Implementation of StubFrame
204
205 class StubFrame: public StackObj {
206 private:
207 StubAssembler* _sasm;
208
209 public:
210 StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments);
211 void load_argument(int offset_in_words, Register reg);
212
213 ~StubFrame();
214 };
215
216 void StubAssembler::prologue(const char* name, bool must_gc_arguments) {
217 set_info(name, must_gc_arguments);
218 enter();
219 }
220
221 void StubAssembler::epilogue() {
222 leave();
223 ret(0);
224 }
225
226 #define __ _sasm->
227
228 StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments) {
229 _sasm = sasm;
230 __ prologue(name, must_gc_arguments);
231 }
232
233 // load parameters that were stored with LIR_Assembler::store_parameter
234 // Note: offsets for store_parameter and load_argument must match
235 void StubFrame::load_argument(int offset_in_words, Register reg) {
236 __ load_parameter(offset_in_words, reg);
237 }
238
239
240 StubFrame::~StubFrame() {
241 __ epilogue();
242 }
243
244 #undef __
245
246
247 // Implementation of Runtime1
248
249 const int float_regs_as_doubles_size_in_slots = pd_nof_fpu_regs_frame_map * 2;
250 const int xmm_regs_as_doubles_size_in_slots = FrameMap::nof_xmm_regs * 2;
251
252 // Stack layout for saving/restoring all the registers needed during a runtime
253 // call (this includes deoptimization)
254 // Note: note that users of this frame may well have arguments to some runtime
255 // while these values are on the stack. These positions neglect those arguments
256 // but the code in save_live_registers will take the argument count into
257 // account.
258 //
259 #ifdef _LP64
260 #define SLOT2(x) x,
261 #define SLOT_PER_WORD 2
262 #else
263 #define SLOT2(x)
264 #define SLOT_PER_WORD 1
265 #endif // _LP64
266
267 enum reg_save_layout {
268 // 64bit needs to keep stack 16 byte aligned. So we add some alignment dummies to make that
269 // happen and will assert if the stack size we create is misaligned
270 #ifdef _LP64
271 align_dummy_0, align_dummy_1,
272 #endif // _LP64
273 #ifdef _WIN64
274 // Windows always allocates space for it's argument registers (see
275 // frame::arg_reg_save_area_bytes).
276 arg_reg_save_1, arg_reg_save_1H, // 0, 4
277 arg_reg_save_2, arg_reg_save_2H, // 8, 12
278 arg_reg_save_3, arg_reg_save_3H, // 16, 20
279 arg_reg_save_4, arg_reg_save_4H, // 24, 28
280 #endif // _WIN64
281 xmm_regs_as_doubles_off, // 32
282 float_regs_as_doubles_off = xmm_regs_as_doubles_off + xmm_regs_as_doubles_size_in_slots, // 160
283 fpu_state_off = float_regs_as_doubles_off + float_regs_as_doubles_size_in_slots, // 224
284 // fpu_state_end_off is exclusive
285 fpu_state_end_off = fpu_state_off + (FPUStateSizeInWords / SLOT_PER_WORD), // 352
286 marker = fpu_state_end_off, SLOT2(markerH) // 352, 356
287 extra_space_offset, // 360
288 #ifdef _LP64
289 r15_off = extra_space_offset, r15H_off, // 360, 364
290 r14_off, r14H_off, // 368, 372
291 r13_off, r13H_off, // 376, 380
292 r12_off, r12H_off, // 384, 388
293 r11_off, r11H_off, // 392, 396
294 r10_off, r10H_off, // 400, 404
295 r9_off, r9H_off, // 408, 412
296 r8_off, r8H_off, // 416, 420
297 rdi_off, rdiH_off, // 424, 428
298 #else
299 rdi_off = extra_space_offset,
300 #endif // _LP64
301 rsi_off, SLOT2(rsiH_off) // 432, 436
302 rbp_off, SLOT2(rbpH_off) // 440, 444
303 rsp_off, SLOT2(rspH_off) // 448, 452
304 rbx_off, SLOT2(rbxH_off) // 456, 460
305 rdx_off, SLOT2(rdxH_off) // 464, 468
306 rcx_off, SLOT2(rcxH_off) // 472, 476
307 rax_off, SLOT2(raxH_off) // 480, 484
308 saved_rbp_off, SLOT2(saved_rbpH_off) // 488, 492
309 return_off, SLOT2(returnH_off) // 496, 500
310 reg_save_frame_size // As noted: neglects any parameters to runtime // 504
311 };
312
313 // Save off registers which might be killed by calls into the runtime.
314 // Tries to smart of about FP registers. In particular we separate
315 // saving and describing the FPU registers for deoptimization since we
316 // have to save the FPU registers twice if we describe them and on P4
317 // saving FPU registers which don't contain anything appears
318 // expensive. The deopt blob is the only thing which needs to
319 // describe FPU registers. In all other cases it should be sufficient
320 // to simply save their current value.
321 //
322 // Register is a class, but it would be assigned numerical value.
323 // "0" is assigned for rax. Thus we need to ignore -Wnonnull.
324 PRAGMA_DIAG_PUSH
325 PRAGMA_NONNULL_IGNORED
326 static OopMap* generate_oop_map(StubAssembler* sasm, int num_rt_args,
327 bool save_fpu_registers = true) {
328
329 // In 64bit all the args are in regs so there are no additional stack slots
330 LP64_ONLY(num_rt_args = 0);
331 LP64_ONLY(assert((reg_save_frame_size * VMRegImpl::stack_slot_size) % 16 == 0, "must be 16 byte aligned");)
332 int frame_size_in_slots = reg_save_frame_size + num_rt_args; // args + thread
333 sasm->set_frame_size(frame_size_in_slots / VMRegImpl::slots_per_word);
334
335 // record saved value locations in an OopMap
336 // locations are offsets from sp after runtime call; num_rt_args is number of arguments in call, including thread
337 OopMap* map = new OopMap(frame_size_in_slots, 0);
338 map->set_callee_saved(VMRegImpl::stack2reg(rax_off + num_rt_args), rax->as_VMReg());
339 map->set_callee_saved(VMRegImpl::stack2reg(rcx_off + num_rt_args), rcx->as_VMReg());
340 map->set_callee_saved(VMRegImpl::stack2reg(rdx_off + num_rt_args), rdx->as_VMReg());
341 map->set_callee_saved(VMRegImpl::stack2reg(rbx_off + num_rt_args), rbx->as_VMReg());
342 map->set_callee_saved(VMRegImpl::stack2reg(rsi_off + num_rt_args), rsi->as_VMReg());
343 map->set_callee_saved(VMRegImpl::stack2reg(rdi_off + num_rt_args), rdi->as_VMReg());
344 #ifdef _LP64
345 map->set_callee_saved(VMRegImpl::stack2reg(r8_off + num_rt_args), r8->as_VMReg());
346 map->set_callee_saved(VMRegImpl::stack2reg(r9_off + num_rt_args), r9->as_VMReg());
347 map->set_callee_saved(VMRegImpl::stack2reg(r10_off + num_rt_args), r10->as_VMReg());
348 map->set_callee_saved(VMRegImpl::stack2reg(r11_off + num_rt_args), r11->as_VMReg());
349 map->set_callee_saved(VMRegImpl::stack2reg(r12_off + num_rt_args), r12->as_VMReg());
350 map->set_callee_saved(VMRegImpl::stack2reg(r13_off + num_rt_args), r13->as_VMReg());
351 map->set_callee_saved(VMRegImpl::stack2reg(r14_off + num_rt_args), r14->as_VMReg());
352 map->set_callee_saved(VMRegImpl::stack2reg(r15_off + num_rt_args), r15->as_VMReg());
353
354 // This is stupid but needed.
355 map->set_callee_saved(VMRegImpl::stack2reg(raxH_off + num_rt_args), rax->as_VMReg()->next());
356 map->set_callee_saved(VMRegImpl::stack2reg(rcxH_off + num_rt_args), rcx->as_VMReg()->next());
357 map->set_callee_saved(VMRegImpl::stack2reg(rdxH_off + num_rt_args), rdx->as_VMReg()->next());
358 map->set_callee_saved(VMRegImpl::stack2reg(rbxH_off + num_rt_args), rbx->as_VMReg()->next());
359 map->set_callee_saved(VMRegImpl::stack2reg(rsiH_off + num_rt_args), rsi->as_VMReg()->next());
360 map->set_callee_saved(VMRegImpl::stack2reg(rdiH_off + num_rt_args), rdi->as_VMReg()->next());
361
362 map->set_callee_saved(VMRegImpl::stack2reg(r8H_off + num_rt_args), r8->as_VMReg()->next());
363 map->set_callee_saved(VMRegImpl::stack2reg(r9H_off + num_rt_args), r9->as_VMReg()->next());
364 map->set_callee_saved(VMRegImpl::stack2reg(r10H_off + num_rt_args), r10->as_VMReg()->next());
365 map->set_callee_saved(VMRegImpl::stack2reg(r11H_off + num_rt_args), r11->as_VMReg()->next());
366 map->set_callee_saved(VMRegImpl::stack2reg(r12H_off + num_rt_args), r12->as_VMReg()->next());
367 map->set_callee_saved(VMRegImpl::stack2reg(r13H_off + num_rt_args), r13->as_VMReg()->next());
368 map->set_callee_saved(VMRegImpl::stack2reg(r14H_off + num_rt_args), r14->as_VMReg()->next());
369 map->set_callee_saved(VMRegImpl::stack2reg(r15H_off + num_rt_args), r15->as_VMReg()->next());
370 #endif // _LP64
371
372 int xmm_bypass_limit = FrameMap::nof_xmm_regs;
373 #ifdef _LP64
374 if (UseAVX < 3) {
375 xmm_bypass_limit = xmm_bypass_limit / 2;
376 }
377 #endif
378
379 if (save_fpu_registers) {
380 #ifndef _LP64
381 if (UseSSE < 2) {
382 int fpu_off = float_regs_as_doubles_off;
383 for (int n = 0; n < FrameMap::nof_fpu_regs; n++) {
384 VMReg fpu_name_0 = FrameMap::fpu_regname(n);
385 map->set_callee_saved(VMRegImpl::stack2reg(fpu_off + num_rt_args), fpu_name_0);
386 // %%% This is really a waste but we'll keep things as they were for now
387 if (true) {
388 map->set_callee_saved(VMRegImpl::stack2reg(fpu_off + 1 + num_rt_args), fpu_name_0->next());
389 }
390 fpu_off += 2;
391 }
392 assert(fpu_off == fpu_state_off, "incorrect number of fpu stack slots");
393
394 if (UseSSE == 1) {
395 int xmm_off = xmm_regs_as_doubles_off;
396 for (int n = 0; n < FrameMap::nof_fpu_regs; n++) {
397 VMReg xmm_name_0 = as_XMMRegister(n)->as_VMReg();
398 map->set_callee_saved(VMRegImpl::stack2reg(xmm_off + num_rt_args), xmm_name_0);
399 xmm_off += 2;
400 }
401 assert(xmm_off == float_regs_as_doubles_off, "incorrect number of xmm registers");
402 }
403 }
404 #endif // !LP64
405
406 if (UseSSE >= 2) {
407 int xmm_off = xmm_regs_as_doubles_off;
408 for (int n = 0; n < FrameMap::nof_xmm_regs; n++) {
409 if (n < xmm_bypass_limit) {
410 VMReg xmm_name_0 = as_XMMRegister(n)->as_VMReg();
411 map->set_callee_saved(VMRegImpl::stack2reg(xmm_off + num_rt_args), xmm_name_0);
412 // %%% This is really a waste but we'll keep things as they were for now
413 if (true) {
414 map->set_callee_saved(VMRegImpl::stack2reg(xmm_off + 1 + num_rt_args), xmm_name_0->next());
415 }
416 }
417 xmm_off += 2;
418 }
419 assert(xmm_off == float_regs_as_doubles_off, "incorrect number of xmm registers");
420 }
421 }
422
423 return map;
424 }
425 PRAGMA_DIAG_POP
426
427 #define __ this->
428
429 void C1_MacroAssembler::save_live_registers_no_oop_map(bool save_fpu_registers) {
430 __ block_comment("save_live_registers");
431
432 __ pusha(); // integer registers
433
434 // assert(float_regs_as_doubles_off % 2 == 0, "misaligned offset");
435 // assert(xmm_regs_as_doubles_off % 2 == 0, "misaligned offset");
436
437 __ subptr(rsp, extra_space_offset * VMRegImpl::stack_slot_size);
438
439 #ifdef ASSERT
440 __ movptr(Address(rsp, marker * VMRegImpl::stack_slot_size), (int32_t)0xfeedbeef);
441 #endif
442
443 if (save_fpu_registers) {
444 #ifndef _LP64
445 if (UseSSE < 2) {
446 // save FPU stack
447 __ fnsave(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size));
448 __ fwait();
449
450 #ifdef ASSERT
451 Label ok;
452 __ cmpw(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size), StubRoutines::x86::fpu_cntrl_wrd_std());
453 __ jccb(Assembler::equal, ok);
454 __ stop("corrupted control word detected");
455 __ bind(ok);
456 #endif
457
458 // Reset the control word to guard against exceptions being unmasked
459 // since fstp_d can cause FPU stack underflow exceptions. Write it
460 // into the on stack copy and then reload that to make sure that the
461 // current and future values are correct.
462 __ movw(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size), StubRoutines::x86::fpu_cntrl_wrd_std());
463 __ frstor(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size));
464
465 // Save the FPU registers in de-opt-able form
466 int offset = 0;
467 for (int n = 0; n < FrameMap::nof_fpu_regs; n++) {
468 __ fstp_d(Address(rsp, float_regs_as_doubles_off * VMRegImpl::stack_slot_size + offset));
469 offset += 8;
470 }
471
472 if (UseSSE == 1) {
473 // save XMM registers as float because double not supported without SSE2(num MMX == num fpu)
474 int offset = 0;
475 for (int n = 0; n < FrameMap::nof_fpu_regs; n++) {
476 XMMRegister xmm_name = as_XMMRegister(n);
477 __ movflt(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + offset), xmm_name);
478 offset += 8;
479 }
480 }
481 }
482 #endif // !_LP64
483
484 if (UseSSE >= 2) {
485 // save XMM registers
486 // XMM registers can contain float or double values, but this is not known here,
487 // so always save them as doubles.
488 // note that float values are _not_ converted automatically, so for float values
489 // the second word contains only garbage data.
490 int xmm_bypass_limit = FrameMap::nof_xmm_regs;
491 int offset = 0;
492 #ifdef _LP64
493 if (UseAVX < 3) {
494 xmm_bypass_limit = xmm_bypass_limit / 2;
495 }
496 #endif
497 for (int n = 0; n < xmm_bypass_limit; n++) {
498 XMMRegister xmm_name = as_XMMRegister(n);
499 __ movdbl(Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + offset), xmm_name);
500 offset += 8;
501 }
502 }
503 }
504
505 // FPU stack must be empty now
506 NOT_LP64( __ verify_FPU(0, "save_live_registers"); )
507 }
508
509 #undef __
510 #define __ sasm->
511
512 static void restore_fpu(C1_MacroAssembler* sasm, bool restore_fpu_registers) {
513 #ifdef _LP64
514 if (restore_fpu_registers) {
515 // restore XMM registers
516 int xmm_bypass_limit = FrameMap::nof_xmm_regs;
517 if (UseAVX < 3) {
518 xmm_bypass_limit = xmm_bypass_limit / 2;
519 }
520 int offset = 0;
521 for (int n = 0; n < xmm_bypass_limit; n++) {
522 XMMRegister xmm_name = as_XMMRegister(n);
523 __ movdbl(xmm_name, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + offset));
524 offset += 8;
525 }
526 }
527 #else
528 if (restore_fpu_registers) {
529 if (UseSSE >= 2) {
530 // restore XMM registers
531 int xmm_bypass_limit = FrameMap::nof_xmm_regs;
532 int offset = 0;
533 for (int n = 0; n < xmm_bypass_limit; n++) {
534 XMMRegister xmm_name = as_XMMRegister(n);
535 __ movdbl(xmm_name, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + offset));
536 offset += 8;
537 }
538 } else if (UseSSE == 1) {
539 // restore XMM registers(num MMX == num fpu)
540 int offset = 0;
541 for (int n = 0; n < FrameMap::nof_fpu_regs; n++) {
542 XMMRegister xmm_name = as_XMMRegister(n);
543 __ movflt(xmm_name, Address(rsp, xmm_regs_as_doubles_off * VMRegImpl::stack_slot_size + offset));
544 offset += 8;
545 }
546 }
547
548 if (UseSSE < 2) {
549 __ frstor(Address(rsp, fpu_state_off * VMRegImpl::stack_slot_size));
550 } else {
551 // check that FPU stack is really empty
552 __ verify_FPU(0, "restore_live_registers");
553 }
554 } else {
555 // check that FPU stack is really empty
556 __ verify_FPU(0, "restore_live_registers");
557 }
558 #endif // _LP64
559
560 #ifdef ASSERT
561 {
562 Label ok;
563 __ cmpptr(Address(rsp, marker * VMRegImpl::stack_slot_size), (int32_t)0xfeedbeef);
564 __ jcc(Assembler::equal, ok);
565 __ stop("bad offsets in frame");
566 __ bind(ok);
567 }
568 #endif // ASSERT
569
570 __ addptr(rsp, extra_space_offset * VMRegImpl::stack_slot_size);
571 }
572
573 #undef __
574 #define __ this->
575
576 void C1_MacroAssembler::restore_live_registers(bool restore_fpu_registers) {
577 __ block_comment("restore_live_registers");
578
579 restore_fpu(this, restore_fpu_registers);
580 __ popa();
581 }
582
583
584 void C1_MacroAssembler::restore_live_registers_except_rax(bool restore_fpu_registers) {
585 __ block_comment("restore_live_registers_except_rax");
586
587 restore_fpu(this, restore_fpu_registers);
588
589 #ifdef _LP64
590 __ movptr(r15, Address(rsp, 0));
591 __ movptr(r14, Address(rsp, wordSize));
592 __ movptr(r13, Address(rsp, 2 * wordSize));
593 __ movptr(r12, Address(rsp, 3 * wordSize));
594 __ movptr(r11, Address(rsp, 4 * wordSize));
595 __ movptr(r10, Address(rsp, 5 * wordSize));
596 __ movptr(r9, Address(rsp, 6 * wordSize));
597 __ movptr(r8, Address(rsp, 7 * wordSize));
598 __ movptr(rdi, Address(rsp, 8 * wordSize));
599 __ movptr(rsi, Address(rsp, 9 * wordSize));
600 __ movptr(rbp, Address(rsp, 10 * wordSize));
601 // skip rsp
602 __ movptr(rbx, Address(rsp, 12 * wordSize));
603 __ movptr(rdx, Address(rsp, 13 * wordSize));
604 __ movptr(rcx, Address(rsp, 14 * wordSize));
605
606 __ addptr(rsp, 16 * wordSize);
607 #else
608
609 __ pop(rdi);
610 __ pop(rsi);
611 __ pop(rbp);
612 __ pop(rbx); // skip this value
613 __ pop(rbx);
614 __ pop(rdx);
615 __ pop(rcx);
616 __ addptr(rsp, BytesPerWord);
617 #endif // _LP64
618 }
619
620 #undef __
621 #define __ sasm->
622
623 static OopMap* save_live_registers(StubAssembler* sasm, int num_rt_args,
624 bool save_fpu_registers = true) {
625 __ save_live_registers_no_oop_map(save_fpu_registers);
626 return generate_oop_map(sasm, num_rt_args, save_fpu_registers);
627 }
628
629 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
630 __ restore_live_registers(restore_fpu_registers);
631 }
632
633 static void restore_live_registers_except_rax(StubAssembler* sasm, bool restore_fpu_registers = true) {
634 sasm->restore_live_registers_except_rax(restore_fpu_registers);
635 }
636
637
638 void Runtime1::initialize_pd() {
639 // nothing to do
640 }
641
642
643 // Target: the entry point of the method that creates and posts the exception oop.
644 // has_argument: true if the exception needs arguments (passed on the stack because
645 // registers must be preserved).
646 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
647 // Preserve all registers.
648 int num_rt_args = has_argument ? (2 + 1) : 1;
649 OopMap* oop_map = save_live_registers(sasm, num_rt_args);
650
651 // Now all registers are saved and can be used freely.
652 // Verify that no old value is used accidentally.
653 __ invalidate_registers(true, true, true, true, true, true);
654
655 // Registers used by this stub.
656 const Register temp_reg = rbx;
657
658 // Load arguments for exception that are passed as arguments into the stub.
659 if (has_argument) {
660 #ifdef _LP64
661 __ movptr(c_rarg1, Address(rbp, 2*BytesPerWord));
662 __ movptr(c_rarg2, Address(rbp, 3*BytesPerWord));
663 #else
664 __ movptr(temp_reg, Address(rbp, 3*BytesPerWord));
665 __ push(temp_reg);
666 __ movptr(temp_reg, Address(rbp, 2*BytesPerWord));
667 __ push(temp_reg);
668 #endif // _LP64
669 }
670 int call_offset = __ call_RT(noreg, noreg, target, num_rt_args - 1);
671
672 OopMapSet* oop_maps = new OopMapSet();
673 oop_maps->add_gc_map(call_offset, oop_map);
674
675 __ stop("should not reach here");
676
677 return oop_maps;
678 }
679
680
681 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler *sasm) {
682 __ block_comment("generate_handle_exception");
683
684 // incoming parameters
685 const Register exception_oop = rax;
686 const Register exception_pc = rdx;
687 // other registers used in this stub
688 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
689
690 // Save registers, if required.
691 OopMapSet* oop_maps = new OopMapSet();
692 OopMap* oop_map = NULL;
693 switch (id) {
694 case forward_exception_id:
695 // We're handling an exception in the context of a compiled frame.
696 // The registers have been saved in the standard places. Perform
697 // an exception lookup in the caller and dispatch to the handler
698 // if found. Otherwise unwind and dispatch to the callers
699 // exception handler.
700 oop_map = generate_oop_map(sasm, 1 /*thread*/);
701
702 // load and clear pending exception oop into RAX
703 __ movptr(exception_oop, Address(thread, Thread::pending_exception_offset()));
704 __ movptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
705
706 // load issuing PC (the return address for this stub) into rdx
707 __ movptr(exception_pc, Address(rbp, 1*BytesPerWord));
708
709 // make sure that the vm_results are cleared (may be unnecessary)
710 __ movptr(Address(thread, JavaThread::vm_result_offset()), NULL_WORD);
711 __ movptr(Address(thread, JavaThread::vm_result_2_offset()), NULL_WORD);
712 break;
713 case handle_exception_nofpu_id:
714 case handle_exception_id:
715 // At this point all registers MAY be live.
716 oop_map = save_live_registers(sasm, 1 /*thread*/, id != handle_exception_nofpu_id);
717 break;
718 case handle_exception_from_callee_id: {
719 // At this point all registers except exception oop (RAX) and
720 // exception pc (RDX) are dead.
721 const int frame_size = 2 /*BP, return address*/ NOT_LP64(+ 1 /*thread*/) WIN64_ONLY(+ frame::arg_reg_save_area_bytes / BytesPerWord);
722 oop_map = new OopMap(frame_size * VMRegImpl::slots_per_word, 0);
723 sasm->set_frame_size(frame_size);
724 WIN64_ONLY(__ subq(rsp, frame::arg_reg_save_area_bytes));
725 break;
726 }
727 default: ShouldNotReachHere();
728 }
729
730 #if !defined(_LP64) && defined(COMPILER2)
731 if (UseSSE < 2 && !CompilerConfig::is_c1_only_no_jvmci()) {
732 // C2 can leave the fpu stack dirty
733 __ empty_FPU_stack();
734 }
735 #endif // !_LP64 && COMPILER2
736
737 // verify that only rax, and rdx is valid at this time
738 __ invalidate_registers(false, true, true, false, true, true);
739 // verify that rax, contains a valid exception
740 __ verify_not_null_oop(exception_oop);
741
742 // load address of JavaThread object for thread-local data
743 NOT_LP64(__ get_thread(thread);)
744
745 #ifdef ASSERT
746 // check that fields in JavaThread for exception oop and issuing pc are
747 // empty before writing to them
748 Label oop_empty;
749 __ cmpptr(Address(thread, JavaThread::exception_oop_offset()), (int32_t) NULL_WORD);
750 __ jcc(Assembler::equal, oop_empty);
751 __ stop("exception oop already set");
752 __ bind(oop_empty);
753
754 Label pc_empty;
755 __ cmpptr(Address(thread, JavaThread::exception_pc_offset()), 0);
756 __ jcc(Assembler::equal, pc_empty);
757 __ stop("exception pc already set");
758 __ bind(pc_empty);
759 #endif
760
761 // save exception oop and issuing pc into JavaThread
762 // (exception handler will load it from here)
763 __ movptr(Address(thread, JavaThread::exception_oop_offset()), exception_oop);
764 __ movptr(Address(thread, JavaThread::exception_pc_offset()), exception_pc);
765
766 // patch throwing pc into return address (has bci & oop map)
767 __ movptr(Address(rbp, 1*BytesPerWord), exception_pc);
768
769 // compute the exception handler.
770 // the exception oop and the throwing pc are read from the fields in JavaThread
771 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
772 oop_maps->add_gc_map(call_offset, oop_map);
773
774 // rax: handler address
775 // will be the deopt blob if nmethod was deoptimized while we looked up
776 // handler regardless of whether handler existed in the nmethod.
777
778 // only rax, is valid at this time, all other registers have been destroyed by the runtime call
779 __ invalidate_registers(false, true, true, true, true, true);
780
781 // patch the return address, this stub will directly return to the exception handler
782 __ movptr(Address(rbp, 1*BytesPerWord), rax);
783
784 switch (id) {
785 case forward_exception_id:
786 case handle_exception_nofpu_id:
787 case handle_exception_id:
788 // Restore the registers that were saved at the beginning.
789 restore_live_registers(sasm, id != handle_exception_nofpu_id);
790 break;
791 case handle_exception_from_callee_id:
792 // WIN64_ONLY: No need to add frame::arg_reg_save_area_bytes to SP
793 // since we do a leave anyway.
794
795 // Pop the return address.
796 __ leave();
797 __ pop(rcx);
798 __ jmp(rcx); // jump to exception handler
799 break;
800 default: ShouldNotReachHere();
801 }
802
803 return oop_maps;
804 }
805
806
807 void Runtime1::generate_unwind_exception(StubAssembler *sasm) {
808 // incoming parameters
809 const Register exception_oop = rax;
810 // callee-saved copy of exception_oop during runtime call
811 const Register exception_oop_callee_saved = NOT_LP64(rsi) LP64_ONLY(r14);
812 // other registers used in this stub
813 const Register exception_pc = rdx;
814 const Register handler_addr = rbx;
815 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
816
817 // verify that only rax, is valid at this time
818 __ invalidate_registers(false, true, true, true, true, true);
819
820 #ifdef ASSERT
821 // check that fields in JavaThread for exception oop and issuing pc are empty
822 NOT_LP64(__ get_thread(thread);)
823 Label oop_empty;
824 __ cmpptr(Address(thread, JavaThread::exception_oop_offset()), 0);
825 __ jcc(Assembler::equal, oop_empty);
826 __ stop("exception oop must be empty");
827 __ bind(oop_empty);
828
829 Label pc_empty;
830 __ cmpptr(Address(thread, JavaThread::exception_pc_offset()), 0);
831 __ jcc(Assembler::equal, pc_empty);
832 __ stop("exception pc must be empty");
833 __ bind(pc_empty);
834 #endif
835
836 // clear the FPU stack in case any FPU results are left behind
837 NOT_LP64( __ empty_FPU_stack(); )
838
839 // save exception_oop in callee-saved register to preserve it during runtime calls
840 __ verify_not_null_oop(exception_oop);
841 __ movptr(exception_oop_callee_saved, exception_oop);
842
843 NOT_LP64(__ get_thread(thread);)
844 // Get return address (is on top of stack after leave).
845 __ movptr(exception_pc, Address(rsp, 0));
846
847 // search the exception handler address of the caller (using the return address)
848 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), thread, exception_pc);
849 // rax: exception handler address of the caller
850
851 // Only RAX and RSI are valid at this time, all other registers have been destroyed by the call.
852 __ invalidate_registers(false, true, true, true, false, true);
853
854 // move result of call into correct register
855 __ movptr(handler_addr, rax);
856
857 // Restore exception oop to RAX (required convention of exception handler).
858 __ movptr(exception_oop, exception_oop_callee_saved);
859
860 // verify that there is really a valid exception in rax
861 __ verify_not_null_oop(exception_oop);
862
863 // get throwing pc (= return address).
864 // rdx has been destroyed by the call, so it must be set again
865 // the pop is also necessary to simulate the effect of a ret(0)
866 __ pop(exception_pc);
867
868 // continue at exception handler (return address removed)
869 // note: do *not* remove arguments when unwinding the
870 // activation since the caller assumes having
871 // all arguments on the stack when entering the
872 // runtime to determine the exception handler
873 // (GC happens at call site with arguments!)
874 // rax: exception oop
875 // rdx: throwing pc
876 // rbx: exception handler
877 __ jmp(handler_addr);
878 }
879
880
881 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
882 // use the maximum number of runtime-arguments here because it is difficult to
883 // distinguish each RT-Call.
884 // Note: This number affects also the RT-Call in generate_handle_exception because
885 // the oop-map is shared for all calls.
886 const int num_rt_args = 2; // thread + dummy
887
888 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
889 assert(deopt_blob != NULL, "deoptimization blob must have been created");
890
891 OopMap* oop_map = save_live_registers(sasm, num_rt_args);
892
893 #ifdef _LP64
894 const Register thread = r15_thread;
895 // No need to worry about dummy
896 __ mov(c_rarg0, thread);
897 #else
898 __ push(rax); // push dummy
899
900 const Register thread = rdi; // is callee-saved register (Visual C++ calling conventions)
901 // push java thread (becomes first argument of C function)
902 __ get_thread(thread);
903 __ push(thread);
904 #endif // _LP64
905 __ set_last_Java_frame(thread, noreg, rbp, NULL);
906 // do the call
907 __ call(RuntimeAddress(target));
908 OopMapSet* oop_maps = new OopMapSet();
909 oop_maps->add_gc_map(__ offset(), oop_map);
910 // verify callee-saved register
911 #ifdef ASSERT
912 guarantee(thread != rax, "change this code");
913 __ push(rax);
914 { Label L;
915 __ get_thread(rax);
916 __ cmpptr(thread, rax);
917 __ jcc(Assembler::equal, L);
918 __ stop("StubAssembler::call_RT: rdi/r15 not callee saved?");
919 __ bind(L);
920 }
921 __ pop(rax);
922 #endif
923 __ reset_last_Java_frame(thread, true);
924 #ifndef _LP64
925 __ pop(rcx); // discard thread arg
926 __ pop(rcx); // discard dummy
927 #endif // _LP64
928
929 // check for pending exceptions
930 { Label L;
931 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
932 __ jcc(Assembler::equal, L);
933 // exception pending => remove activation and forward to exception handler
934
935 __ testptr(rax, rax); // have we deoptimized?
936 __ jump_cc(Assembler::equal,
937 RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
938
939 // the deopt blob expects exceptions in the special fields of
940 // JavaThread, so copy and clear pending exception.
941
942 // load and clear pending exception
943 __ movptr(rax, Address(thread, Thread::pending_exception_offset()));
944 __ movptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
945
946 // check that there is really a valid exception
947 __ verify_not_null_oop(rax);
948
949 // load throwing pc: this is the return address of the stub
950 __ movptr(rdx, Address(rsp, return_off * VMRegImpl::stack_slot_size));
951
952 #ifdef ASSERT
953 // check that fields in JavaThread for exception oop and issuing pc are empty
954 Label oop_empty;
955 __ cmpptr(Address(thread, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD);
956 __ jcc(Assembler::equal, oop_empty);
957 __ stop("exception oop must be empty");
958 __ bind(oop_empty);
959
960 Label pc_empty;
961 __ cmpptr(Address(thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD);
962 __ jcc(Assembler::equal, pc_empty);
963 __ stop("exception pc must be empty");
964 __ bind(pc_empty);
965 #endif
966
967 // store exception oop and throwing pc to JavaThread
968 __ movptr(Address(thread, JavaThread::exception_oop_offset()), rax);
969 __ movptr(Address(thread, JavaThread::exception_pc_offset()), rdx);
970
971 restore_live_registers(sasm);
972
973 __ leave();
974 __ addptr(rsp, BytesPerWord); // remove return address from stack
975
976 // Forward the exception directly to deopt blob. We can blow no
977 // registers and must leave throwing pc on the stack. A patch may
978 // have values live in registers so the entry point with the
979 // exception in tls.
980 __ jump(RuntimeAddress(deopt_blob->unpack_with_exception_in_tls()));
981
982 __ bind(L);
983 }
984
985
986 // Runtime will return true if the nmethod has been deoptimized during
987 // the patching process. In that case we must do a deopt reexecute instead.
988
989 Label cont;
990
991 __ testptr(rax, rax); // have we deoptimized?
992 __ jcc(Assembler::equal, cont); // no
993
994 // Will reexecute. Proper return address is already on the stack we just restore
995 // registers, pop all of our frame but the return address and jump to the deopt blob
996 restore_live_registers(sasm);
997 __ leave();
998 __ jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
999
1000 __ bind(cont);
1001 restore_live_registers(sasm);
1002 __ leave();
1003 __ ret(0);
1004
1005 return oop_maps;
1006 }
1007
1008
1009 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
1010
1011 // for better readability
1012 const bool must_gc_arguments = true;
1013 const bool dont_gc_arguments = false;
1014
1015 // default value; overwritten for some optimized stubs that are called from methods that do not use the fpu
1016 bool save_fpu_registers = true;
1017
1018 // stub code & info for the different stubs
1019 OopMapSet* oop_maps = NULL;
1020 switch (id) {
1021 case forward_exception_id:
1022 {
1023 oop_maps = generate_handle_exception(id, sasm);
1024 __ leave();
1025 __ ret(0);
1026 }
1027 break;
1028
1029 case new_instance_id:
1030 case fast_new_instance_id:
1031 case fast_new_instance_init_check_id:
1032 {
1033 Register klass = rdx; // Incoming
1034 Register obj = rax; // Result
1035
1036 if (id == new_instance_id) {
1037 __ set_info("new_instance", dont_gc_arguments);
1038 } else if (id == fast_new_instance_id) {
1039 __ set_info("fast new_instance", dont_gc_arguments);
1040 } else {
1041 assert(id == fast_new_instance_init_check_id, "bad StubID");
1042 __ set_info("fast new_instance init check", dont_gc_arguments);
1043 }
1044
1045 // If TLAB is disabled, see if there is support for inlining contiguous
1046 // allocations.
1047 // Otherwise, just go to the slow path.
1048 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) && !UseTLAB
1049 && Universe::heap()->supports_inline_contig_alloc()) {
1050 Label slow_path;
1051 Register obj_size = rcx;
1052 Register t1 = rbx;
1053 Register t2 = rsi;
1054 assert_different_registers(klass, obj, obj_size, t1, t2);
1055
1056 __ push(rdi);
1057 __ push(rbx);
1058
1059 if (id == fast_new_instance_init_check_id) {
1060 // make sure the klass is initialized
1061 __ cmpb(Address(klass, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized);
1062 __ jcc(Assembler::notEqual, slow_path);
1063 }
1064
1065 #ifdef ASSERT
1066 // assert object can be fast path allocated
1067 {
1068 Label ok, not_ok;
1069 __ movl(obj_size, Address(klass, Klass::layout_helper_offset()));
1070 __ cmpl(obj_size, 0); // make sure it's an instance (LH > 0)
1071 __ jcc(Assembler::lessEqual, not_ok);
1072 __ testl(obj_size, Klass::_lh_instance_slow_path_bit);
1073 __ jcc(Assembler::zero, ok);
1074 __ bind(not_ok);
1075 __ stop("assert(can be fast path allocated)");
1076 __ should_not_reach_here();
1077 __ bind(ok);
1078 }
1079 #endif // ASSERT
1080
1081 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
1082 NOT_LP64(__ get_thread(thread));
1083
1084 // get the instance size (size is postive so movl is fine for 64bit)
1085 __ movl(obj_size, Address(klass, Klass::layout_helper_offset()));
1086
1087 __ eden_allocate(thread, obj, obj_size, 0, t1, slow_path);
1088
1089 __ initialize_object(obj, klass, obj_size, 0, t1, t2, /* is_tlab_allocated */ false);
1090 __ verify_oop(obj);
1091 __ pop(rbx);
1092 __ pop(rdi);
1093 __ ret(0);
1094
1095 __ bind(slow_path);
1096 __ pop(rbx);
1097 __ pop(rdi);
1098 }
1099
1100 __ enter();
1101 OopMap* map = save_live_registers(sasm, 2);
1102 int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass);
1103 oop_maps = new OopMapSet();
1104 oop_maps->add_gc_map(call_offset, map);
1105 restore_live_registers_except_rax(sasm);
1106 __ verify_oop(obj);
1107 __ leave();
1108 __ ret(0);
1109
1110 // rax,: new instance
1111 }
1112
1113 break;
1114 #ifdef _LP64
1115 case load_klass_id:
1116 {
1117 StubFrame f(sasm, "load_klass", dont_gc_arguments);
1118 sasm->save_live_registers_no_oop_map(true);
1119 f.load_argument(0, c_rarg0); // obj
1120 __ call_VM_leaf(CAST_FROM_FN_PTR(address, oopDesc::load_klass_runtime), c_rarg0);
1121 sasm->restore_live_registers_except_rax(true);
1122 }
1123 break;
1124 #endif
1125 case counter_overflow_id:
1126 {
1127 Register bci = rax, method = rbx;
1128 __ enter();
1129 OopMap* map = save_live_registers(sasm, 3);
1130 // Retrieve bci
1131 __ movl(bci, Address(rbp, 2*BytesPerWord));
1132 // And a pointer to the Method*
1133 __ movptr(method, Address(rbp, 3*BytesPerWord));
1134 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method);
1135 oop_maps = new OopMapSet();
1136 oop_maps->add_gc_map(call_offset, map);
1137 restore_live_registers(sasm);
1138 __ leave();
1139 __ ret(0);
1140 }
1141 break;
1142
1143 case new_type_array_id:
1144 case new_object_array_id:
1145 {
1146 Register length = rbx; // Incoming
1147 Register klass = rdx; // Incoming
1148 Register obj = rax; // Result
1149
1150 if (id == new_type_array_id) {
1151 __ set_info("new_type_array", dont_gc_arguments);
1152 } else {
1153 __ set_info("new_object_array", dont_gc_arguments);
1154 }
1155
1156 #ifdef ASSERT
1157 // assert object type is really an array of the proper kind
1158 {
1159 Label ok;
1160 Register t0 = obj;
1161 __ movl(t0, Address(klass, Klass::layout_helper_offset()));
1162 __ sarl(t0, Klass::_lh_array_tag_shift);
1163 int tag = ((id == new_type_array_id)
1164 ? Klass::_lh_array_tag_type_value
1165 : Klass::_lh_array_tag_obj_value);
1166 __ cmpl(t0, tag);
1167 __ jcc(Assembler::equal, ok);
1168 __ stop("assert(is an array klass)");
1169 __ should_not_reach_here();
1170 __ bind(ok);
1171 }
1172 #endif // ASSERT
1173
1174 // If TLAB is disabled, see if there is support for inlining contiguous
1175 // allocations.
1176 // Otherwise, just go to the slow path.
1177 if (!UseTLAB && Universe::heap()->supports_inline_contig_alloc()) {
1178 Register arr_size = rsi;
1179 Register t1 = rcx; // must be rcx for use as shift count
1180 Register t2 = rdi;
1181 Label slow_path;
1182
1183 // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F))
1184 // since size is positive movl does right thing on 64bit
1185 __ movl(t1, Address(klass, Klass::layout_helper_offset()));
1186 // since size is postive movl does right thing on 64bit
1187 __ movl(arr_size, length);
1188 assert(t1 == rcx, "fixed register usage");
1189 __ shlptr(arr_size /* by t1=rcx, mod 32 */);
1190 __ shrptr(t1, Klass::_lh_header_size_shift);
1191 __ andptr(t1, Klass::_lh_header_size_mask);
1192 __ addptr(arr_size, t1);
1193 __ addptr(arr_size, MinObjAlignmentInBytesMask); // align up
1194 __ andptr(arr_size, ~MinObjAlignmentInBytesMask);
1195
1196 // Using t2 for non 64-bit.
1197 const Register thread = NOT_LP64(t2) LP64_ONLY(r15_thread);
1198 NOT_LP64(__ get_thread(thread));
1199 __ eden_allocate(thread, obj, arr_size, 0, t1, slow_path); // preserves arr_size
1200
1201 __ initialize_header(obj, klass, length, t1, t2);
1202 __ movb(t1, Address(klass, in_bytes(Klass::layout_helper_offset()) + (Klass::_lh_header_size_shift / BitsPerByte)));
1203 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
1204 assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise");
1205 __ andptr(t1, Klass::_lh_header_size_mask);
1206 __ subptr(arr_size, t1); // body length
1207 __ addptr(t1, obj); // body start
1208 __ initialize_body(t1, arr_size, 0, t2);
1209 __ verify_oop(obj);
1210 __ ret(0);
1211
1212 __ bind(slow_path);
1213 }
1214
1215 __ enter();
1216 OopMap* map = save_live_registers(sasm, 3);
1217 int call_offset;
1218 if (id == new_type_array_id) {
1219 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length);
1220 } else {
1221 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length);
1222 }
1223
1224 oop_maps = new OopMapSet();
1225 oop_maps->add_gc_map(call_offset, map);
1226 restore_live_registers_except_rax(sasm);
1227
1228 __ verify_oop(obj);
1229 __ leave();
1230 __ ret(0);
1231
1232 // rax,: new array
1233 }
1234 break;
1235
1236 case new_multi_array_id:
1237 { StubFrame f(sasm, "new_multi_array", dont_gc_arguments);
1238 // rax,: klass
1239 // rbx,: rank
1240 // rcx: address of 1st dimension
1241 OopMap* map = save_live_registers(sasm, 4);
1242 int call_offset = __ call_RT(rax, noreg, CAST_FROM_FN_PTR(address, new_multi_array), rax, rbx, rcx);
1243
1244 oop_maps = new OopMapSet();
1245 oop_maps->add_gc_map(call_offset, map);
1246 restore_live_registers_except_rax(sasm);
1247
1248 // rax,: new multi array
1249 __ verify_oop(rax);
1250 }
1251 break;
1252
1253 case register_finalizer_id:
1254 {
1255 __ set_info("register_finalizer", dont_gc_arguments);
1256
1257 // This is called via call_runtime so the arguments
1258 // will be place in C abi locations
1259
1260 #ifdef _LP64
1261 __ verify_oop(c_rarg0);
1262 __ mov(rax, c_rarg0);
1263 #else
1264 // The object is passed on the stack and we haven't pushed a
1265 // frame yet so it's one work away from top of stack.
1266 __ movptr(rax, Address(rsp, 1 * BytesPerWord));
1267 __ verify_oop(rax);
1268 #endif // _LP64
1269
1270 // load the klass and check the has finalizer flag
1271 Label register_finalizer;
1272 Register tmp_load_klass = LP64_ONLY(rscratch1) NOT_LP64(noreg);
1273 Register t = rsi;
1274 __ load_klass(t, rax, tmp_load_klass);
1275 __ movl(t, Address(t, Klass::access_flags_offset()));
1276 __ testl(t, JVM_ACC_HAS_FINALIZER);
1277 __ jcc(Assembler::notZero, register_finalizer);
1278 __ ret(0);
1279
1280 __ bind(register_finalizer);
1281 __ enter();
1282 OopMap* oop_map = save_live_registers(sasm, 2 /*num_rt_args */);
1283 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), rax);
1284 oop_maps = new OopMapSet();
1285 oop_maps->add_gc_map(call_offset, oop_map);
1286
1287 // Now restore all the live registers
1288 restore_live_registers(sasm);
1289
1290 __ leave();
1291 __ ret(0);
1292 }
1293 break;
1294
1295 case throw_range_check_failed_id:
1296 { StubFrame f(sasm, "range_check_failed", dont_gc_arguments);
1297 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
1298 }
1299 break;
1300
1301 case throw_index_exception_id:
1302 { StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments);
1303 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
1304 }
1305 break;
1306
1307 case throw_div0_exception_id:
1308 { StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments);
1309 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
1310 }
1311 break;
1312
1313 case throw_null_pointer_exception_id:
1314 { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments);
1315 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
1316 }
1317 break;
1318
1319 case handle_exception_nofpu_id:
1320 case handle_exception_id:
1321 { StubFrame f(sasm, "handle_exception", dont_gc_arguments);
1322 oop_maps = generate_handle_exception(id, sasm);
1323 }
1324 break;
1325
1326 case handle_exception_from_callee_id:
1327 { StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments);
1328 oop_maps = generate_handle_exception(id, sasm);
1329 }
1330 break;
1331
1332 case unwind_exception_id:
1333 { __ set_info("unwind_exception", dont_gc_arguments);
1334 // note: no stubframe since we are about to leave the current
1335 // activation and we are calling a leaf VM function only.
1336 generate_unwind_exception(sasm);
1337 }
1338 break;
1339
1340 case throw_array_store_exception_id:
1341 { StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments);
1342 // tos + 0: link
1343 // + 1: return address
1344 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
1345 }
1346 break;
1347
1348 case throw_class_cast_exception_id:
1349 { StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments);
1350 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
1351 }
1352 break;
1353
1354 case throw_incompatible_class_change_error_id:
1355 { StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments);
1356 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
1357 }
1358 break;
1359
1360 case slow_subtype_check_id:
1361 {
1362 // Typical calling sequence:
1363 // __ push(klass_RInfo); // object klass or other subclass
1364 // __ push(sup_k_RInfo); // array element klass or other superclass
1365 // __ call(slow_subtype_check);
1366 // Note that the subclass is pushed first, and is therefore deepest.
1367 // Previous versions of this code reversed the names 'sub' and 'super'.
1368 // This was operationally harmless but made the code unreadable.
1369 enum layout {
1370 rax_off, SLOT2(raxH_off)
1371 rcx_off, SLOT2(rcxH_off)
1372 rsi_off, SLOT2(rsiH_off)
1373 rdi_off, SLOT2(rdiH_off)
1374 // saved_rbp_off, SLOT2(saved_rbpH_off)
1375 return_off, SLOT2(returnH_off)
1376 sup_k_off, SLOT2(sup_kH_off)
1377 klass_off, SLOT2(superH_off)
1378 framesize,
1379 result_off = klass_off // deepest argument is also the return value
1380 };
1381
1382 __ set_info("slow_subtype_check", dont_gc_arguments);
1383 __ push(rdi);
1384 __ push(rsi);
1385 __ push(rcx);
1386 __ push(rax);
1387
1388 // This is called by pushing args and not with C abi
1389 __ movptr(rsi, Address(rsp, (klass_off) * VMRegImpl::stack_slot_size)); // subclass
1390 __ movptr(rax, Address(rsp, (sup_k_off) * VMRegImpl::stack_slot_size)); // superclass
1391
1392 Label miss;
1393 __ check_klass_subtype_slow_path(rsi, rax, rcx, rdi, NULL, &miss);
1394
1395 // fallthrough on success:
1396 __ movptr(Address(rsp, (result_off) * VMRegImpl::stack_slot_size), 1); // result
1397 __ pop(rax);
1398 __ pop(rcx);
1399 __ pop(rsi);
1400 __ pop(rdi);
1401 __ ret(0);
1402
1403 __ bind(miss);
1404 __ movptr(Address(rsp, (result_off) * VMRegImpl::stack_slot_size), NULL_WORD); // result
1405 __ pop(rax);
1406 __ pop(rcx);
1407 __ pop(rsi);
1408 __ pop(rdi);
1409 __ ret(0);
1410 }
1411 break;
1412
1413 case monitorenter_nofpu_id:
1414 save_fpu_registers = false;
1415 // fall through
1416 case monitorenter_id:
1417 {
1418 StubFrame f(sasm, "monitorenter", dont_gc_arguments);
1419 OopMap* map = save_live_registers(sasm, 3, save_fpu_registers);
1420
1421 // Called with store_parameter and not C abi
1422
1423 f.load_argument(1, rax); // rax,: object
1424 f.load_argument(0, rbx); // rbx,: lock address
1425
1426 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), rax, rbx);
1427
1428 oop_maps = new OopMapSet();
1429 oop_maps->add_gc_map(call_offset, map);
1430 restore_live_registers(sasm, save_fpu_registers);
1431 }
1432 break;
1433
1434 case monitorexit_nofpu_id:
1435 save_fpu_registers = false;
1436 // fall through
1437 case monitorexit_id:
1438 {
1439 StubFrame f(sasm, "monitorexit", dont_gc_arguments);
1440 OopMap* map = save_live_registers(sasm, 2, save_fpu_registers);
1441
1442 // Called with store_parameter and not C abi
1443
1444 f.load_argument(0, rax); // rax,: lock address
1445
1446 // note: really a leaf routine but must setup last java sp
1447 // => use call_RT for now (speed can be improved by
1448 // doing last java sp setup manually)
1449 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), rax);
1450
1451 oop_maps = new OopMapSet();
1452 oop_maps->add_gc_map(call_offset, map);
1453 restore_live_registers(sasm, save_fpu_registers);
1454 }
1455 break;
1456
1457 case deoptimize_id:
1458 {
1459 StubFrame f(sasm, "deoptimize", dont_gc_arguments);
1460 const int num_rt_args = 2; // thread, trap_request
1461 OopMap* oop_map = save_live_registers(sasm, num_rt_args);
1462 f.load_argument(0, rax);
1463 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), rax);
1464 oop_maps = new OopMapSet();
1465 oop_maps->add_gc_map(call_offset, oop_map);
1466 restore_live_registers(sasm);
1467 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
1468 assert(deopt_blob != NULL, "deoptimization blob must have been created");
1469 __ leave();
1470 __ jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
1471 }
1472 break;
1473
1474 case access_field_patching_id:
1475 { StubFrame f(sasm, "access_field_patching", dont_gc_arguments);
1476 // we should set up register map
1477 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
1478 }
1479 break;
1480
1481 case load_klass_patching_id:
1482 { StubFrame f(sasm, "load_klass_patching", dont_gc_arguments);
1483 // we should set up register map
1484 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
1485 }
1486 break;
1487
1488 case load_mirror_patching_id:
1489 { StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments);
1490 // we should set up register map
1491 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
1492 }
1493 break;
1494
1495 case load_appendix_patching_id:
1496 { StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments);
1497 // we should set up register map
1498 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
1499 }
1500 break;
1501
1502 case dtrace_object_alloc_id:
1503 { // rax,: object
1504 StubFrame f(sasm, "dtrace_object_alloc", dont_gc_arguments);
1505 // we can't gc here so skip the oopmap but make sure that all
1506 // the live registers get saved.
1507 save_live_registers(sasm, 1);
1508
1509 __ NOT_LP64(push(rax)) LP64_ONLY(mov(c_rarg0, rax));
1510 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc))));
1511 NOT_LP64(__ pop(rax));
1512
1513 restore_live_registers(sasm);
1514 }
1515 break;
1516
1517 case fpu2long_stub_id:
1518 {
1519 #ifdef _LP64
1520 Label done;
1521 __ cvttsd2siq(rax, Address(rsp, wordSize));
1522 __ cmp64(rax, ExternalAddress((address) StubRoutines::x86::double_sign_flip()));
1523 __ jccb(Assembler::notEqual, done);
1524 __ movq(rax, Address(rsp, wordSize));
1525 __ subptr(rsp, 8);
1526 __ movq(Address(rsp, 0), rax);
1527 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::d2l_fixup())));
1528 __ pop(rax);
1529 __ bind(done);
1530 __ ret(0);
1531 #else
1532 // rax, and rdx are destroyed, but should be free since the result is returned there
1533 // preserve rsi,ecx
1534 __ push(rsi);
1535 __ push(rcx);
1536
1537 // check for NaN
1538 Label return0, do_return, return_min_jlong, do_convert;
1539
1540 Address value_high_word(rsp, wordSize + 4);
1541 Address value_low_word(rsp, wordSize);
1542 Address result_high_word(rsp, 3*wordSize + 4);
1543 Address result_low_word(rsp, 3*wordSize);
1544
1545 __ subptr(rsp, 32); // more than enough on 32bit
1546 __ fst_d(value_low_word);
1547 __ movl(rax, value_high_word);
1548 __ andl(rax, 0x7ff00000);
1549 __ cmpl(rax, 0x7ff00000);
1550 __ jcc(Assembler::notEqual, do_convert);
1551 __ movl(rax, value_high_word);
1552 __ andl(rax, 0xfffff);
1553 __ orl(rax, value_low_word);
1554 __ jcc(Assembler::notZero, return0);
1555
1556 __ bind(do_convert);
1557 __ fnstcw(Address(rsp, 0));
1558 __ movzwl(rax, Address(rsp, 0));
1559 __ orl(rax, 0xc00);
1560 __ movw(Address(rsp, 2), rax);
1561 __ fldcw(Address(rsp, 2));
1562 __ fwait();
1563 __ fistp_d(result_low_word);
1564 __ fldcw(Address(rsp, 0));
1565 __ fwait();
1566 // This gets the entire long in rax on 64bit
1567 __ movptr(rax, result_low_word);
1568 // testing of high bits
1569 __ movl(rdx, result_high_word);
1570 __ mov(rcx, rax);
1571 // What the heck is the point of the next instruction???
1572 __ xorl(rcx, 0x0);
1573 __ movl(rsi, 0x80000000);
1574 __ xorl(rsi, rdx);
1575 __ orl(rcx, rsi);
1576 __ jcc(Assembler::notEqual, do_return);
1577 __ fldz();
1578 __ fcomp_d(value_low_word);
1579 __ fnstsw_ax();
1580 __ sahf();
1581 __ jcc(Assembler::above, return_min_jlong);
1582 // return max_jlong
1583 __ movl(rdx, 0x7fffffff);
1584 __ movl(rax, 0xffffffff);
1585 __ jmp(do_return);
1586
1587 __ bind(return_min_jlong);
1588 __ movl(rdx, 0x80000000);
1589 __ xorl(rax, rax);
1590 __ jmp(do_return);
1591
1592 __ bind(return0);
1593 __ fpop();
1594 __ xorptr(rdx,rdx);
1595 __ xorptr(rax,rax);
1596
1597 __ bind(do_return);
1598 __ addptr(rsp, 32);
1599 __ pop(rcx);
1600 __ pop(rsi);
1601 __ ret(0);
1602 #endif // _LP64
1603 }
1604 break;
1605
1606 case predicate_failed_trap_id:
1607 {
1608 StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments);
1609
1610 OopMap* map = save_live_registers(sasm, 1);
1611
1612 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
1613 oop_maps = new OopMapSet();
1614 oop_maps->add_gc_map(call_offset, map);
1615 restore_live_registers(sasm);
1616 __ leave();
1617 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
1618 assert(deopt_blob != NULL, "deoptimization blob must have been created");
1619
1620 __ jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
1621 }
1622 break;
1623
1624 default:
1625 { StubFrame f(sasm, "unimplemented entry", dont_gc_arguments);
1626 __ movptr(rax, (int)id);
1627 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), rax);
1628 __ should_not_reach_here();
1629 }
1630 break;
1631 }
1632 return oop_maps;
1633 }
1634
1635 #undef __
1636
1637 const char *Runtime1::pd_name_for_address(address entry) {
1638 return "<unknown function>";
1639 }