Mercurial > hg > truffle
annotate src/cpu/x86/vm/sharedRuntime_x86_32.cpp @ 6639:892ec0920ccd
Merge
author | vladidan |
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date | Wed, 08 Aug 2012 16:09:11 -0400 |
parents | 0382d2b469b2 |
children | 1d7922586cf6 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "asm/assembler.hpp" | |
27 #include "assembler_x86.inline.hpp" | |
28 #include "code/debugInfoRec.hpp" | |
29 #include "code/icBuffer.hpp" | |
30 #include "code/vtableStubs.hpp" | |
31 #include "interpreter/interpreter.hpp" | |
32 #include "oops/compiledICHolderOop.hpp" | |
33 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
34 #include "runtime/sharedRuntime.hpp" | |
35 #include "runtime/vframeArray.hpp" | |
36 #include "vmreg_x86.inline.hpp" | |
37 #ifdef COMPILER1 | |
38 #include "c1/c1_Runtime1.hpp" | |
39 #endif | |
40 #ifdef COMPILER2 | |
41 #include "opto/runtime.hpp" | |
42 #endif | |
0 | 43 |
44 #define __ masm-> | |
45 | |
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46 const int StackAlignmentInSlots = StackAlignmentInBytes / VMRegImpl::stack_slot_size; |
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47 |
0 | 48 class RegisterSaver { |
49 enum { FPU_regs_live = 8 /*for the FPU stack*/+8/*eight more for XMM registers*/ }; | |
50 // Capture info about frame layout | |
51 enum layout { | |
52 fpu_state_off = 0, | |
53 fpu_state_end = fpu_state_off+FPUStateSizeInWords-1, | |
54 st0_off, st0H_off, | |
55 st1_off, st1H_off, | |
56 st2_off, st2H_off, | |
57 st3_off, st3H_off, | |
58 st4_off, st4H_off, | |
59 st5_off, st5H_off, | |
60 st6_off, st6H_off, | |
61 st7_off, st7H_off, | |
62 | |
63 xmm0_off, xmm0H_off, | |
64 xmm1_off, xmm1H_off, | |
65 xmm2_off, xmm2H_off, | |
66 xmm3_off, xmm3H_off, | |
67 xmm4_off, xmm4H_off, | |
68 xmm5_off, xmm5H_off, | |
69 xmm6_off, xmm6H_off, | |
70 xmm7_off, xmm7H_off, | |
71 flags_off, | |
72 rdi_off, | |
73 rsi_off, | |
74 ignore_off, // extra copy of rbp, | |
75 rsp_off, | |
76 rbx_off, | |
77 rdx_off, | |
78 rcx_off, | |
79 rax_off, | |
80 // The frame sender code expects that rbp will be in the "natural" place and | |
81 // will override any oopMap setting for it. We must therefore force the layout | |
82 // so that it agrees with the frame sender code. | |
83 rbp_off, | |
84 return_off, // slot for return address | |
85 reg_save_size }; | |
86 | |
87 | |
88 public: | |
89 | |
90 static OopMap* save_live_registers(MacroAssembler* masm, int additional_frame_words, | |
91 int* total_frame_words, bool verify_fpu = true); | |
92 static void restore_live_registers(MacroAssembler* masm); | |
93 | |
94 static int rax_offset() { return rax_off; } | |
95 static int rbx_offset() { return rbx_off; } | |
96 | |
97 // Offsets into the register save area | |
98 // Used by deoptimization when it is managing result register | |
99 // values on its own | |
100 | |
101 static int raxOffset(void) { return rax_off; } | |
102 static int rdxOffset(void) { return rdx_off; } | |
103 static int rbxOffset(void) { return rbx_off; } | |
104 static int xmm0Offset(void) { return xmm0_off; } | |
105 // This really returns a slot in the fp save area, which one is not important | |
106 static int fpResultOffset(void) { return st0_off; } | |
107 | |
108 // During deoptimization only the result register need to be restored | |
109 // all the other values have already been extracted. | |
110 | |
111 static void restore_result_registers(MacroAssembler* masm); | |
112 | |
113 }; | |
114 | |
115 OopMap* RegisterSaver::save_live_registers(MacroAssembler* masm, int additional_frame_words, | |
116 int* total_frame_words, bool verify_fpu) { | |
117 | |
118 int frame_size_in_bytes = (reg_save_size + additional_frame_words) * wordSize; | |
119 int frame_words = frame_size_in_bytes / wordSize; | |
120 *total_frame_words = frame_words; | |
121 | |
122 assert(FPUStateSizeInWords == 27, "update stack layout"); | |
123 | |
124 // save registers, fpu state, and flags | |
125 // We assume caller has already has return address slot on the stack | |
126 // We push epb twice in this sequence because we want the real rbp, | |
304 | 127 // to be under the return like a normal enter and we want to use pusha |
0 | 128 // We push by hand instead of pusing push |
129 __ enter(); | |
304 | 130 __ pusha(); |
131 __ pushf(); | |
132 __ subptr(rsp,FPU_regs_live*sizeof(jdouble)); // Push FPU registers space | |
0 | 133 __ push_FPU_state(); // Save FPU state & init |
134 | |
135 if (verify_fpu) { | |
136 // Some stubs may have non standard FPU control word settings so | |
137 // only check and reset the value when it required to be the | |
138 // standard value. The safepoint blob in particular can be used | |
139 // in methods which are using the 24 bit control word for | |
140 // optimized float math. | |
141 | |
142 #ifdef ASSERT | |
143 // Make sure the control word has the expected value | |
144 Label ok; | |
145 __ cmpw(Address(rsp, 0), StubRoutines::fpu_cntrl_wrd_std()); | |
146 __ jccb(Assembler::equal, ok); | |
147 __ stop("corrupted control word detected"); | |
148 __ bind(ok); | |
149 #endif | |
150 | |
151 // Reset the control word to guard against exceptions being unmasked | |
152 // since fstp_d can cause FPU stack underflow exceptions. Write it | |
153 // into the on stack copy and then reload that to make sure that the | |
154 // current and future values are correct. | |
155 __ movw(Address(rsp, 0), StubRoutines::fpu_cntrl_wrd_std()); | |
156 } | |
157 | |
158 __ frstor(Address(rsp, 0)); | |
159 if (!verify_fpu) { | |
160 // Set the control word so that exceptions are masked for the | |
161 // following code. | |
162 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); | |
163 } | |
164 | |
165 // Save the FPU registers in de-opt-able form | |
166 | |
167 __ fstp_d(Address(rsp, st0_off*wordSize)); // st(0) | |
168 __ fstp_d(Address(rsp, st1_off*wordSize)); // st(1) | |
169 __ fstp_d(Address(rsp, st2_off*wordSize)); // st(2) | |
170 __ fstp_d(Address(rsp, st3_off*wordSize)); // st(3) | |
171 __ fstp_d(Address(rsp, st4_off*wordSize)); // st(4) | |
172 __ fstp_d(Address(rsp, st5_off*wordSize)); // st(5) | |
173 __ fstp_d(Address(rsp, st6_off*wordSize)); // st(6) | |
174 __ fstp_d(Address(rsp, st7_off*wordSize)); // st(7) | |
175 | |
176 if( UseSSE == 1 ) { // Save the XMM state | |
177 __ movflt(Address(rsp,xmm0_off*wordSize),xmm0); | |
178 __ movflt(Address(rsp,xmm1_off*wordSize),xmm1); | |
179 __ movflt(Address(rsp,xmm2_off*wordSize),xmm2); | |
180 __ movflt(Address(rsp,xmm3_off*wordSize),xmm3); | |
181 __ movflt(Address(rsp,xmm4_off*wordSize),xmm4); | |
182 __ movflt(Address(rsp,xmm5_off*wordSize),xmm5); | |
183 __ movflt(Address(rsp,xmm6_off*wordSize),xmm6); | |
184 __ movflt(Address(rsp,xmm7_off*wordSize),xmm7); | |
185 } else if( UseSSE >= 2 ) { | |
186 __ movdbl(Address(rsp,xmm0_off*wordSize),xmm0); | |
187 __ movdbl(Address(rsp,xmm1_off*wordSize),xmm1); | |
188 __ movdbl(Address(rsp,xmm2_off*wordSize),xmm2); | |
189 __ movdbl(Address(rsp,xmm3_off*wordSize),xmm3); | |
190 __ movdbl(Address(rsp,xmm4_off*wordSize),xmm4); | |
191 __ movdbl(Address(rsp,xmm5_off*wordSize),xmm5); | |
192 __ movdbl(Address(rsp,xmm6_off*wordSize),xmm6); | |
193 __ movdbl(Address(rsp,xmm7_off*wordSize),xmm7); | |
194 } | |
195 | |
196 // Set an oopmap for the call site. This oopmap will map all | |
197 // oop-registers and debug-info registers as callee-saved. This | |
198 // will allow deoptimization at this safepoint to find all possible | |
199 // debug-info recordings, as well as let GC find all oops. | |
200 | |
201 OopMapSet *oop_maps = new OopMapSet(); | |
202 OopMap* map = new OopMap( frame_words, 0 ); | |
203 | |
204 #define STACK_OFFSET(x) VMRegImpl::stack2reg((x) + additional_frame_words) | |
205 | |
206 map->set_callee_saved(STACK_OFFSET( rax_off), rax->as_VMReg()); | |
207 map->set_callee_saved(STACK_OFFSET( rcx_off), rcx->as_VMReg()); | |
208 map->set_callee_saved(STACK_OFFSET( rdx_off), rdx->as_VMReg()); | |
209 map->set_callee_saved(STACK_OFFSET( rbx_off), rbx->as_VMReg()); | |
210 // rbp, location is known implicitly, no oopMap | |
211 map->set_callee_saved(STACK_OFFSET( rsi_off), rsi->as_VMReg()); | |
212 map->set_callee_saved(STACK_OFFSET( rdi_off), rdi->as_VMReg()); | |
213 map->set_callee_saved(STACK_OFFSET(st0_off), as_FloatRegister(0)->as_VMReg()); | |
214 map->set_callee_saved(STACK_OFFSET(st1_off), as_FloatRegister(1)->as_VMReg()); | |
215 map->set_callee_saved(STACK_OFFSET(st2_off), as_FloatRegister(2)->as_VMReg()); | |
216 map->set_callee_saved(STACK_OFFSET(st3_off), as_FloatRegister(3)->as_VMReg()); | |
217 map->set_callee_saved(STACK_OFFSET(st4_off), as_FloatRegister(4)->as_VMReg()); | |
218 map->set_callee_saved(STACK_OFFSET(st5_off), as_FloatRegister(5)->as_VMReg()); | |
219 map->set_callee_saved(STACK_OFFSET(st6_off), as_FloatRegister(6)->as_VMReg()); | |
220 map->set_callee_saved(STACK_OFFSET(st7_off), as_FloatRegister(7)->as_VMReg()); | |
221 map->set_callee_saved(STACK_OFFSET(xmm0_off), xmm0->as_VMReg()); | |
222 map->set_callee_saved(STACK_OFFSET(xmm1_off), xmm1->as_VMReg()); | |
223 map->set_callee_saved(STACK_OFFSET(xmm2_off), xmm2->as_VMReg()); | |
224 map->set_callee_saved(STACK_OFFSET(xmm3_off), xmm3->as_VMReg()); | |
225 map->set_callee_saved(STACK_OFFSET(xmm4_off), xmm4->as_VMReg()); | |
226 map->set_callee_saved(STACK_OFFSET(xmm5_off), xmm5->as_VMReg()); | |
227 map->set_callee_saved(STACK_OFFSET(xmm6_off), xmm6->as_VMReg()); | |
228 map->set_callee_saved(STACK_OFFSET(xmm7_off), xmm7->as_VMReg()); | |
229 // %%% This is really a waste but we'll keep things as they were for now | |
230 if (true) { | |
231 #define NEXTREG(x) (x)->as_VMReg()->next() | |
232 map->set_callee_saved(STACK_OFFSET(st0H_off), NEXTREG(as_FloatRegister(0))); | |
233 map->set_callee_saved(STACK_OFFSET(st1H_off), NEXTREG(as_FloatRegister(1))); | |
234 map->set_callee_saved(STACK_OFFSET(st2H_off), NEXTREG(as_FloatRegister(2))); | |
235 map->set_callee_saved(STACK_OFFSET(st3H_off), NEXTREG(as_FloatRegister(3))); | |
236 map->set_callee_saved(STACK_OFFSET(st4H_off), NEXTREG(as_FloatRegister(4))); | |
237 map->set_callee_saved(STACK_OFFSET(st5H_off), NEXTREG(as_FloatRegister(5))); | |
238 map->set_callee_saved(STACK_OFFSET(st6H_off), NEXTREG(as_FloatRegister(6))); | |
239 map->set_callee_saved(STACK_OFFSET(st7H_off), NEXTREG(as_FloatRegister(7))); | |
240 map->set_callee_saved(STACK_OFFSET(xmm0H_off), NEXTREG(xmm0)); | |
241 map->set_callee_saved(STACK_OFFSET(xmm1H_off), NEXTREG(xmm1)); | |
242 map->set_callee_saved(STACK_OFFSET(xmm2H_off), NEXTREG(xmm2)); | |
243 map->set_callee_saved(STACK_OFFSET(xmm3H_off), NEXTREG(xmm3)); | |
244 map->set_callee_saved(STACK_OFFSET(xmm4H_off), NEXTREG(xmm4)); | |
245 map->set_callee_saved(STACK_OFFSET(xmm5H_off), NEXTREG(xmm5)); | |
246 map->set_callee_saved(STACK_OFFSET(xmm6H_off), NEXTREG(xmm6)); | |
247 map->set_callee_saved(STACK_OFFSET(xmm7H_off), NEXTREG(xmm7)); | |
248 #undef NEXTREG | |
249 #undef STACK_OFFSET | |
250 } | |
251 | |
252 return map; | |
253 | |
254 } | |
255 | |
256 void RegisterSaver::restore_live_registers(MacroAssembler* masm) { | |
257 | |
258 // Recover XMM & FPU state | |
259 if( UseSSE == 1 ) { | |
260 __ movflt(xmm0,Address(rsp,xmm0_off*wordSize)); | |
261 __ movflt(xmm1,Address(rsp,xmm1_off*wordSize)); | |
262 __ movflt(xmm2,Address(rsp,xmm2_off*wordSize)); | |
263 __ movflt(xmm3,Address(rsp,xmm3_off*wordSize)); | |
264 __ movflt(xmm4,Address(rsp,xmm4_off*wordSize)); | |
265 __ movflt(xmm5,Address(rsp,xmm5_off*wordSize)); | |
266 __ movflt(xmm6,Address(rsp,xmm6_off*wordSize)); | |
267 __ movflt(xmm7,Address(rsp,xmm7_off*wordSize)); | |
268 } else if( UseSSE >= 2 ) { | |
269 __ movdbl(xmm0,Address(rsp,xmm0_off*wordSize)); | |
270 __ movdbl(xmm1,Address(rsp,xmm1_off*wordSize)); | |
271 __ movdbl(xmm2,Address(rsp,xmm2_off*wordSize)); | |
272 __ movdbl(xmm3,Address(rsp,xmm3_off*wordSize)); | |
273 __ movdbl(xmm4,Address(rsp,xmm4_off*wordSize)); | |
274 __ movdbl(xmm5,Address(rsp,xmm5_off*wordSize)); | |
275 __ movdbl(xmm6,Address(rsp,xmm6_off*wordSize)); | |
276 __ movdbl(xmm7,Address(rsp,xmm7_off*wordSize)); | |
277 } | |
278 __ pop_FPU_state(); | |
304 | 279 __ addptr(rsp, FPU_regs_live*sizeof(jdouble)); // Pop FPU registers |
280 | |
281 __ popf(); | |
282 __ popa(); | |
0 | 283 // Get the rbp, described implicitly by the frame sender code (no oopMap) |
304 | 284 __ pop(rbp); |
0 | 285 |
286 } | |
287 | |
288 void RegisterSaver::restore_result_registers(MacroAssembler* masm) { | |
289 | |
290 // Just restore result register. Only used by deoptimization. By | |
291 // now any callee save register that needs to be restore to a c2 | |
292 // caller of the deoptee has been extracted into the vframeArray | |
293 // and will be stuffed into the c2i adapter we create for later | |
294 // restoration so only result registers need to be restored here. | |
295 // | |
296 | |
297 __ frstor(Address(rsp, 0)); // Restore fpu state | |
298 | |
299 // Recover XMM & FPU state | |
300 if( UseSSE == 1 ) { | |
301 __ movflt(xmm0, Address(rsp, xmm0_off*wordSize)); | |
302 } else if( UseSSE >= 2 ) { | |
303 __ movdbl(xmm0, Address(rsp, xmm0_off*wordSize)); | |
304 } | |
304 | 305 __ movptr(rax, Address(rsp, rax_off*wordSize)); |
306 __ movptr(rdx, Address(rsp, rdx_off*wordSize)); | |
0 | 307 // Pop all of the register save are off the stack except the return address |
304 | 308 __ addptr(rsp, return_off * wordSize); |
0 | 309 } |
310 | |
311 // The java_calling_convention describes stack locations as ideal slots on | |
312 // a frame with no abi restrictions. Since we must observe abi restrictions | |
313 // (like the placement of the register window) the slots must be biased by | |
314 // the following value. | |
315 static int reg2offset_in(VMReg r) { | |
316 // Account for saved rbp, and return address | |
317 // This should really be in_preserve_stack_slots | |
318 return (r->reg2stack() + 2) * VMRegImpl::stack_slot_size; | |
319 } | |
320 | |
321 static int reg2offset_out(VMReg r) { | |
322 return (r->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size; | |
323 } | |
324 | |
325 // --------------------------------------------------------------------------- | |
326 // Read the array of BasicTypes from a signature, and compute where the | |
327 // arguments should go. Values in the VMRegPair regs array refer to 4-byte | |
328 // quantities. Values less than SharedInfo::stack0 are registers, those above | |
329 // refer to 4-byte stack slots. All stack slots are based off of the stack pointer | |
330 // as framesizes are fixed. | |
331 // VMRegImpl::stack0 refers to the first slot 0(sp). | |
332 // and VMRegImpl::stack0+1 refers to the memory word 4-byes higher. Register | |
333 // up to RegisterImpl::number_of_registers) are the 32-bit | |
334 // integer registers. | |
335 | |
336 // Pass first two oop/int args in registers ECX and EDX. | |
337 // Pass first two float/double args in registers XMM0 and XMM1. | |
338 // Doubles have precedence, so if you pass a mix of floats and doubles | |
339 // the doubles will grab the registers before the floats will. | |
340 | |
341 // Note: the INPUTS in sig_bt are in units of Java argument words, which are | |
342 // either 32-bit or 64-bit depending on the build. The OUTPUTS are in 32-bit | |
343 // units regardless of build. Of course for i486 there is no 64 bit build | |
344 | |
345 | |
346 // --------------------------------------------------------------------------- | |
347 // The compiled Java calling convention. | |
348 // Pass first two oop/int args in registers ECX and EDX. | |
349 // Pass first two float/double args in registers XMM0 and XMM1. | |
350 // Doubles have precedence, so if you pass a mix of floats and doubles | |
351 // the doubles will grab the registers before the floats will. | |
352 int SharedRuntime::java_calling_convention(const BasicType *sig_bt, | |
353 VMRegPair *regs, | |
354 int total_args_passed, | |
355 int is_outgoing) { | |
356 uint stack = 0; // Starting stack position for args on stack | |
357 | |
358 | |
359 // Pass first two oop/int args in registers ECX and EDX. | |
360 uint reg_arg0 = 9999; | |
361 uint reg_arg1 = 9999; | |
362 | |
363 // Pass first two float/double args in registers XMM0 and XMM1. | |
364 // Doubles have precedence, so if you pass a mix of floats and doubles | |
365 // the doubles will grab the registers before the floats will. | |
366 // CNC - TURNED OFF FOR non-SSE. | |
367 // On Intel we have to round all doubles (and most floats) at | |
368 // call sites by storing to the stack in any case. | |
369 // UseSSE=0 ==> Don't Use ==> 9999+0 | |
370 // UseSSE=1 ==> Floats only ==> 9999+1 | |
371 // UseSSE>=2 ==> Floats or doubles ==> 9999+2 | |
372 enum { fltarg_dontuse = 9999+0, fltarg_float_only = 9999+1, fltarg_flt_dbl = 9999+2 }; | |
373 uint fargs = (UseSSE>=2) ? 2 : UseSSE; | |
374 uint freg_arg0 = 9999+fargs; | |
375 uint freg_arg1 = 9999+fargs; | |
376 | |
377 // Pass doubles & longs aligned on the stack. First count stack slots for doubles | |
378 int i; | |
379 for( i = 0; i < total_args_passed; i++) { | |
380 if( sig_bt[i] == T_DOUBLE ) { | |
381 // first 2 doubles go in registers | |
382 if( freg_arg0 == fltarg_flt_dbl ) freg_arg0 = i; | |
383 else if( freg_arg1 == fltarg_flt_dbl ) freg_arg1 = i; | |
384 else // Else double is passed low on the stack to be aligned. | |
385 stack += 2; | |
386 } else if( sig_bt[i] == T_LONG ) { | |
387 stack += 2; | |
388 } | |
389 } | |
390 int dstack = 0; // Separate counter for placing doubles | |
391 | |
392 // Now pick where all else goes. | |
393 for( i = 0; i < total_args_passed; i++) { | |
394 // From the type and the argument number (count) compute the location | |
395 switch( sig_bt[i] ) { | |
396 case T_SHORT: | |
397 case T_CHAR: | |
398 case T_BYTE: | |
399 case T_BOOLEAN: | |
400 case T_INT: | |
401 case T_ARRAY: | |
402 case T_OBJECT: | |
403 case T_ADDRESS: | |
404 if( reg_arg0 == 9999 ) { | |
405 reg_arg0 = i; | |
406 regs[i].set1(rcx->as_VMReg()); | |
407 } else if( reg_arg1 == 9999 ) { | |
408 reg_arg1 = i; | |
409 regs[i].set1(rdx->as_VMReg()); | |
410 } else { | |
411 regs[i].set1(VMRegImpl::stack2reg(stack++)); | |
412 } | |
413 break; | |
414 case T_FLOAT: | |
415 if( freg_arg0 == fltarg_flt_dbl || freg_arg0 == fltarg_float_only ) { | |
416 freg_arg0 = i; | |
417 regs[i].set1(xmm0->as_VMReg()); | |
418 } else if( freg_arg1 == fltarg_flt_dbl || freg_arg1 == fltarg_float_only ) { | |
419 freg_arg1 = i; | |
420 regs[i].set1(xmm1->as_VMReg()); | |
421 } else { | |
422 regs[i].set1(VMRegImpl::stack2reg(stack++)); | |
423 } | |
424 break; | |
425 case T_LONG: | |
426 assert(sig_bt[i+1] == T_VOID, "missing Half" ); | |
427 regs[i].set2(VMRegImpl::stack2reg(dstack)); | |
428 dstack += 2; | |
429 break; | |
430 case T_DOUBLE: | |
431 assert(sig_bt[i+1] == T_VOID, "missing Half" ); | |
432 if( freg_arg0 == (uint)i ) { | |
433 regs[i].set2(xmm0->as_VMReg()); | |
434 } else if( freg_arg1 == (uint)i ) { | |
435 regs[i].set2(xmm1->as_VMReg()); | |
436 } else { | |
437 regs[i].set2(VMRegImpl::stack2reg(dstack)); | |
438 dstack += 2; | |
439 } | |
440 break; | |
441 case T_VOID: regs[i].set_bad(); break; | |
442 break; | |
443 default: | |
444 ShouldNotReachHere(); | |
445 break; | |
446 } | |
447 } | |
448 | |
449 // return value can be odd number of VMRegImpl stack slots make multiple of 2 | |
450 return round_to(stack, 2); | |
451 } | |
452 | |
453 // Patch the callers callsite with entry to compiled code if it exists. | |
454 static void patch_callers_callsite(MacroAssembler *masm) { | |
455 Label L; | |
456 __ verify_oop(rbx); | |
304 | 457 __ cmpptr(Address(rbx, in_bytes(methodOopDesc::code_offset())), (int32_t)NULL_WORD); |
0 | 458 __ jcc(Assembler::equal, L); |
459 // Schedule the branch target address early. | |
460 // Call into the VM to patch the caller, then jump to compiled callee | |
461 // rax, isn't live so capture return address while we easily can | |
304 | 462 __ movptr(rax, Address(rsp, 0)); |
463 __ pusha(); | |
464 __ pushf(); | |
0 | 465 |
466 if (UseSSE == 1) { | |
304 | 467 __ subptr(rsp, 2*wordSize); |
0 | 468 __ movflt(Address(rsp, 0), xmm0); |
469 __ movflt(Address(rsp, wordSize), xmm1); | |
470 } | |
471 if (UseSSE >= 2) { | |
304 | 472 __ subptr(rsp, 4*wordSize); |
0 | 473 __ movdbl(Address(rsp, 0), xmm0); |
474 __ movdbl(Address(rsp, 2*wordSize), xmm1); | |
475 } | |
476 #ifdef COMPILER2 | |
477 // C2 may leave the stack dirty if not in SSE2+ mode | |
478 if (UseSSE >= 2) { | |
479 __ verify_FPU(0, "c2i transition should have clean FPU stack"); | |
480 } else { | |
481 __ empty_FPU_stack(); | |
482 } | |
483 #endif /* COMPILER2 */ | |
484 | |
485 // VM needs caller's callsite | |
304 | 486 __ push(rax); |
0 | 487 // VM needs target method |
304 | 488 __ push(rbx); |
0 | 489 __ verify_oop(rbx); |
490 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite))); | |
304 | 491 __ addptr(rsp, 2*wordSize); |
0 | 492 |
493 if (UseSSE == 1) { | |
494 __ movflt(xmm0, Address(rsp, 0)); | |
495 __ movflt(xmm1, Address(rsp, wordSize)); | |
304 | 496 __ addptr(rsp, 2*wordSize); |
0 | 497 } |
498 if (UseSSE >= 2) { | |
499 __ movdbl(xmm0, Address(rsp, 0)); | |
500 __ movdbl(xmm1, Address(rsp, 2*wordSize)); | |
304 | 501 __ addptr(rsp, 4*wordSize); |
0 | 502 } |
503 | |
304 | 504 __ popf(); |
505 __ popa(); | |
0 | 506 __ bind(L); |
507 } | |
508 | |
509 | |
510 static void move_c2i_double(MacroAssembler *masm, XMMRegister r, int st_off) { | |
1506 | 511 int next_off = st_off - Interpreter::stackElementSize; |
512 __ movdbl(Address(rsp, next_off), r); | |
0 | 513 } |
514 | |
515 static void gen_c2i_adapter(MacroAssembler *masm, | |
516 int total_args_passed, | |
517 int comp_args_on_stack, | |
518 const BasicType *sig_bt, | |
519 const VMRegPair *regs, | |
520 Label& skip_fixup) { | |
521 // Before we get into the guts of the C2I adapter, see if we should be here | |
522 // at all. We've come from compiled code and are attempting to jump to the | |
523 // interpreter, which means the caller made a static call to get here | |
524 // (vcalls always get a compiled target if there is one). Check for a | |
525 // compiled target. If there is one, we need to patch the caller's call. | |
526 patch_callers_callsite(masm); | |
527 | |
528 __ bind(skip_fixup); | |
529 | |
530 #ifdef COMPILER2 | |
531 // C2 may leave the stack dirty if not in SSE2+ mode | |
532 if (UseSSE >= 2) { | |
533 __ verify_FPU(0, "c2i transition should have clean FPU stack"); | |
534 } else { | |
535 __ empty_FPU_stack(); | |
536 } | |
537 #endif /* COMPILER2 */ | |
538 | |
539 // Since all args are passed on the stack, total_args_passed * interpreter_ | |
540 // stack_element_size is the | |
541 // space we need. | |
1506 | 542 int extraspace = total_args_passed * Interpreter::stackElementSize; |
0 | 543 |
544 // Get return address | |
304 | 545 __ pop(rax); |
0 | 546 |
547 // set senderSP value | |
304 | 548 __ movptr(rsi, rsp); |
549 | |
550 __ subptr(rsp, extraspace); | |
0 | 551 |
552 // Now write the args into the outgoing interpreter space | |
553 for (int i = 0; i < total_args_passed; i++) { | |
554 if (sig_bt[i] == T_VOID) { | |
555 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
556 continue; | |
557 } | |
558 | |
559 // st_off points to lowest address on stack. | |
1506 | 560 int st_off = ((total_args_passed - 1) - i) * Interpreter::stackElementSize; |
561 int next_off = st_off - Interpreter::stackElementSize; | |
304 | 562 |
0 | 563 // Say 4 args: |
564 // i st_off | |
565 // 0 12 T_LONG | |
566 // 1 8 T_VOID | |
567 // 2 4 T_OBJECT | |
568 // 3 0 T_BOOL | |
569 VMReg r_1 = regs[i].first(); | |
570 VMReg r_2 = regs[i].second(); | |
571 if (!r_1->is_valid()) { | |
572 assert(!r_2->is_valid(), ""); | |
573 continue; | |
574 } | |
575 | |
576 if (r_1->is_stack()) { | |
577 // memory to memory use fpu stack top | |
578 int ld_off = r_1->reg2stack() * VMRegImpl::stack_slot_size + extraspace; | |
579 | |
580 if (!r_2->is_valid()) { | |
581 __ movl(rdi, Address(rsp, ld_off)); | |
304 | 582 __ movptr(Address(rsp, st_off), rdi); |
0 | 583 } else { |
584 | |
585 // ld_off == LSW, ld_off+VMRegImpl::stack_slot_size == MSW | |
586 // st_off == MSW, st_off-wordSize == LSW | |
587 | |
304 | 588 __ movptr(rdi, Address(rsp, ld_off)); |
589 __ movptr(Address(rsp, next_off), rdi); | |
590 #ifndef _LP64 | |
591 __ movptr(rdi, Address(rsp, ld_off + wordSize)); | |
592 __ movptr(Address(rsp, st_off), rdi); | |
593 #else | |
594 #ifdef ASSERT | |
595 // Overwrite the unused slot with known junk | |
596 __ mov64(rax, CONST64(0xdeadffffdeadaaaa)); | |
597 __ movptr(Address(rsp, st_off), rax); | |
598 #endif /* ASSERT */ | |
599 #endif // _LP64 | |
0 | 600 } |
601 } else if (r_1->is_Register()) { | |
602 Register r = r_1->as_Register(); | |
603 if (!r_2->is_valid()) { | |
604 __ movl(Address(rsp, st_off), r); | |
605 } else { | |
606 // long/double in gpr | |
304 | 607 NOT_LP64(ShouldNotReachHere()); |
608 // Two VMRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG | |
609 // T_DOUBLE and T_LONG use two slots in the interpreter | |
610 if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
611 // long/double in gpr | |
612 #ifdef ASSERT | |
613 // Overwrite the unused slot with known junk | |
614 LP64_ONLY(__ mov64(rax, CONST64(0xdeadffffdeadaaab))); | |
615 __ movptr(Address(rsp, st_off), rax); | |
616 #endif /* ASSERT */ | |
617 __ movptr(Address(rsp, next_off), r); | |
618 } else { | |
619 __ movptr(Address(rsp, st_off), r); | |
620 } | |
0 | 621 } |
622 } else { | |
623 assert(r_1->is_XMMRegister(), ""); | |
624 if (!r_2->is_valid()) { | |
625 __ movflt(Address(rsp, st_off), r_1->as_XMMRegister()); | |
626 } else { | |
627 assert(sig_bt[i] == T_DOUBLE || sig_bt[i] == T_LONG, "wrong type"); | |
628 move_c2i_double(masm, r_1->as_XMMRegister(), st_off); | |
629 } | |
630 } | |
631 } | |
632 | |
633 // Schedule the branch target address early. | |
304 | 634 __ movptr(rcx, Address(rbx, in_bytes(methodOopDesc::interpreter_entry_offset()))); |
0 | 635 // And repush original return address |
304 | 636 __ push(rax); |
0 | 637 __ jmp(rcx); |
638 } | |
639 | |
640 | |
641 static void move_i2c_double(MacroAssembler *masm, XMMRegister r, Register saved_sp, int ld_off) { | |
1506 | 642 int next_val_off = ld_off - Interpreter::stackElementSize; |
643 __ movdbl(r, Address(saved_sp, next_val_off)); | |
0 | 644 } |
645 | |
646 static void gen_i2c_adapter(MacroAssembler *masm, | |
647 int total_args_passed, | |
648 int comp_args_on_stack, | |
649 const BasicType *sig_bt, | |
650 const VMRegPair *regs) { | |
651 | |
652 // Note: rsi contains the senderSP on entry. We must preserve it since | |
653 // we may do a i2c -> c2i transition if we lose a race where compiled | |
654 // code goes non-entrant while we get args ready. | |
655 | |
656 // Pick up the return address | |
304 | 657 __ movptr(rax, Address(rsp, 0)); |
0 | 658 |
659 // Must preserve original SP for loading incoming arguments because | |
660 // we need to align the outgoing SP for compiled code. | |
304 | 661 __ movptr(rdi, rsp); |
0 | 662 |
663 // Cut-out for having no stack args. Since up to 2 int/oop args are passed | |
664 // in registers, we will occasionally have no stack args. | |
665 int comp_words_on_stack = 0; | |
666 if (comp_args_on_stack) { | |
667 // Sig words on the stack are greater-than VMRegImpl::stack0. Those in | |
668 // registers are below. By subtracting stack0, we either get a negative | |
669 // number (all values in registers) or the maximum stack slot accessed. | |
670 // int comp_args_on_stack = VMRegImpl::reg2stack(max_arg); | |
671 // Convert 4-byte stack slots to words. | |
672 comp_words_on_stack = round_to(comp_args_on_stack*4, wordSize)>>LogBytesPerWord; | |
673 // Round up to miminum stack alignment, in wordSize | |
674 comp_words_on_stack = round_to(comp_words_on_stack, 2); | |
304 | 675 __ subptr(rsp, comp_words_on_stack * wordSize); |
0 | 676 } |
677 | |
678 // Align the outgoing SP | |
304 | 679 __ andptr(rsp, -(StackAlignmentInBytes)); |
0 | 680 |
681 // push the return address on the stack (note that pushing, rather | |
682 // than storing it, yields the correct frame alignment for the callee) | |
304 | 683 __ push(rax); |
0 | 684 |
685 // Put saved SP in another register | |
686 const Register saved_sp = rax; | |
304 | 687 __ movptr(saved_sp, rdi); |
0 | 688 |
689 | |
690 // Will jump to the compiled code just as if compiled code was doing it. | |
691 // Pre-load the register-jump target early, to schedule it better. | |
304 | 692 __ movptr(rdi, Address(rbx, in_bytes(methodOopDesc::from_compiled_offset()))); |
0 | 693 |
694 // Now generate the shuffle code. Pick up all register args and move the | |
695 // rest through the floating point stack top. | |
696 for (int i = 0; i < total_args_passed; i++) { | |
697 if (sig_bt[i] == T_VOID) { | |
698 // Longs and doubles are passed in native word order, but misaligned | |
699 // in the 32-bit build. | |
700 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
701 continue; | |
702 } | |
703 | |
704 // Pick up 0, 1 or 2 words from SP+offset. | |
705 | |
706 assert(!regs[i].second()->is_valid() || regs[i].first()->next() == regs[i].second(), | |
707 "scrambled load targets?"); | |
708 // Load in argument order going down. | |
1506 | 709 int ld_off = (total_args_passed - i) * Interpreter::stackElementSize; |
0 | 710 // Point to interpreter value (vs. tag) |
1506 | 711 int next_off = ld_off - Interpreter::stackElementSize; |
0 | 712 // |
713 // | |
714 // | |
715 VMReg r_1 = regs[i].first(); | |
716 VMReg r_2 = regs[i].second(); | |
717 if (!r_1->is_valid()) { | |
718 assert(!r_2->is_valid(), ""); | |
719 continue; | |
720 } | |
721 if (r_1->is_stack()) { | |
722 // Convert stack slot to an SP offset (+ wordSize to account for return address ) | |
723 int st_off = regs[i].first()->reg2stack()*VMRegImpl::stack_slot_size + wordSize; | |
724 | |
725 // We can use rsi as a temp here because compiled code doesn't need rsi as an input | |
726 // and if we end up going thru a c2i because of a miss a reasonable value of rsi | |
727 // we be generated. | |
728 if (!r_2->is_valid()) { | |
729 // __ fld_s(Address(saved_sp, ld_off)); | |
730 // __ fstp_s(Address(rsp, st_off)); | |
731 __ movl(rsi, Address(saved_sp, ld_off)); | |
304 | 732 __ movptr(Address(rsp, st_off), rsi); |
0 | 733 } else { |
734 // Interpreter local[n] == MSW, local[n+1] == LSW however locals | |
735 // are accessed as negative so LSW is at LOW address | |
736 | |
737 // ld_off is MSW so get LSW | |
738 // st_off is LSW (i.e. reg.first()) | |
739 // __ fld_d(Address(saved_sp, next_off)); | |
740 // __ fstp_d(Address(rsp, st_off)); | |
304 | 741 // |
742 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE | |
743 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case | |
744 // So we must adjust where to pick up the data to match the interpreter. | |
745 // | |
746 // Interpreter local[n] == MSW, local[n+1] == LSW however locals | |
747 // are accessed as negative so LSW is at LOW address | |
748 | |
749 // ld_off is MSW so get LSW | |
750 const int offset = (NOT_LP64(true ||) sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? | |
751 next_off : ld_off; | |
752 __ movptr(rsi, Address(saved_sp, offset)); | |
753 __ movptr(Address(rsp, st_off), rsi); | |
754 #ifndef _LP64 | |
755 __ movptr(rsi, Address(saved_sp, ld_off)); | |
756 __ movptr(Address(rsp, st_off + wordSize), rsi); | |
757 #endif // _LP64 | |
0 | 758 } |
759 } else if (r_1->is_Register()) { // Register argument | |
760 Register r = r_1->as_Register(); | |
761 assert(r != rax, "must be different"); | |
762 if (r_2->is_valid()) { | |
304 | 763 // |
764 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE | |
765 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case | |
766 // So we must adjust where to pick up the data to match the interpreter. | |
767 | |
768 const int offset = (NOT_LP64(true ||) sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? | |
769 next_off : ld_off; | |
770 | |
771 // this can be a misaligned move | |
772 __ movptr(r, Address(saved_sp, offset)); | |
773 #ifndef _LP64 | |
0 | 774 assert(r_2->as_Register() != rax, "need another temporary register"); |
775 // Remember r_1 is low address (and LSB on x86) | |
776 // So r_2 gets loaded from high address regardless of the platform | |
304 | 777 __ movptr(r_2->as_Register(), Address(saved_sp, ld_off)); |
778 #endif // _LP64 | |
0 | 779 } else { |
780 __ movl(r, Address(saved_sp, ld_off)); | |
781 } | |
782 } else { | |
783 assert(r_1->is_XMMRegister(), ""); | |
784 if (!r_2->is_valid()) { | |
785 __ movflt(r_1->as_XMMRegister(), Address(saved_sp, ld_off)); | |
786 } else { | |
787 move_i2c_double(masm, r_1->as_XMMRegister(), saved_sp, ld_off); | |
788 } | |
789 } | |
790 } | |
791 | |
792 // 6243940 We might end up in handle_wrong_method if | |
793 // the callee is deoptimized as we race thru here. If that | |
794 // happens we don't want to take a safepoint because the | |
795 // caller frame will look interpreted and arguments are now | |
796 // "compiled" so it is much better to make this transition | |
797 // invisible to the stack walking code. Unfortunately if | |
798 // we try and find the callee by normal means a safepoint | |
799 // is possible. So we stash the desired callee in the thread | |
800 // and the vm will find there should this case occur. | |
801 | |
802 __ get_thread(rax); | |
304 | 803 __ movptr(Address(rax, JavaThread::callee_target_offset()), rbx); |
0 | 804 |
805 // move methodOop to rax, in case we end up in an c2i adapter. | |
806 // the c2i adapters expect methodOop in rax, (c2) because c2's | |
807 // resolve stubs return the result (the method) in rax,. | |
808 // I'd love to fix this. | |
304 | 809 __ mov(rax, rbx); |
0 | 810 |
811 __ jmp(rdi); | |
812 } | |
813 | |
814 // --------------------------------------------------------------- | |
815 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm, | |
816 int total_args_passed, | |
817 int comp_args_on_stack, | |
818 const BasicType *sig_bt, | |
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819 const VMRegPair *regs, |
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820 AdapterFingerPrint* fingerprint) { |
0 | 821 address i2c_entry = __ pc(); |
822 | |
823 gen_i2c_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs); | |
824 | |
825 // ------------------------------------------------------------------------- | |
826 // Generate a C2I adapter. On entry we know rbx, holds the methodOop during calls | |
827 // to the interpreter. The args start out packed in the compiled layout. They | |
828 // need to be unpacked into the interpreter layout. This will almost always | |
829 // require some stack space. We grow the current (compiled) stack, then repack | |
830 // the args. We finally end in a jump to the generic interpreter entry point. | |
831 // On exit from the interpreter, the interpreter will restore our SP (lest the | |
832 // compiled code, which relys solely on SP and not EBP, get sick). | |
833 | |
834 address c2i_unverified_entry = __ pc(); | |
835 Label skip_fixup; | |
836 | |
837 Register holder = rax; | |
838 Register receiver = rcx; | |
839 Register temp = rbx; | |
840 | |
841 { | |
842 | |
843 Label missed; | |
844 | |
845 __ verify_oop(holder); | |
304 | 846 __ movptr(temp, Address(receiver, oopDesc::klass_offset_in_bytes())); |
0 | 847 __ verify_oop(temp); |
848 | |
304 | 849 __ cmpptr(temp, Address(holder, compiledICHolderOopDesc::holder_klass_offset())); |
850 __ movptr(rbx, Address(holder, compiledICHolderOopDesc::holder_method_offset())); | |
0 | 851 __ jcc(Assembler::notEqual, missed); |
852 // Method might have been compiled since the call site was patched to | |
853 // interpreted if that is the case treat it as a miss so we can get | |
854 // the call site corrected. | |
304 | 855 __ cmpptr(Address(rbx, in_bytes(methodOopDesc::code_offset())), (int32_t)NULL_WORD); |
0 | 856 __ jcc(Assembler::equal, skip_fixup); |
857 | |
858 __ bind(missed); | |
859 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
860 } | |
861 | |
862 address c2i_entry = __ pc(); | |
863 | |
864 gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup); | |
865 | |
866 __ flush(); | |
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867 return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
0 | 868 } |
869 | |
870 int SharedRuntime::c_calling_convention(const BasicType *sig_bt, | |
871 VMRegPair *regs, | |
872 int total_args_passed) { | |
873 // We return the amount of VMRegImpl stack slots we need to reserve for all | |
874 // the arguments NOT counting out_preserve_stack_slots. | |
875 | |
876 uint stack = 0; // All arguments on stack | |
877 | |
878 for( int i = 0; i < total_args_passed; i++) { | |
879 // From the type and the argument number (count) compute the location | |
880 switch( sig_bt[i] ) { | |
881 case T_BOOLEAN: | |
882 case T_CHAR: | |
883 case T_FLOAT: | |
884 case T_BYTE: | |
885 case T_SHORT: | |
886 case T_INT: | |
887 case T_OBJECT: | |
888 case T_ARRAY: | |
889 case T_ADDRESS: | |
890 regs[i].set1(VMRegImpl::stack2reg(stack++)); | |
891 break; | |
892 case T_LONG: | |
893 case T_DOUBLE: // The stack numbering is reversed from Java | |
894 // Since C arguments do not get reversed, the ordering for | |
895 // doubles on the stack must be opposite the Java convention | |
896 assert(sig_bt[i+1] == T_VOID, "missing Half" ); | |
897 regs[i].set2(VMRegImpl::stack2reg(stack)); | |
898 stack += 2; | |
899 break; | |
900 case T_VOID: regs[i].set_bad(); break; | |
901 default: | |
902 ShouldNotReachHere(); | |
903 break; | |
904 } | |
905 } | |
906 return stack; | |
907 } | |
908 | |
909 // A simple move of integer like type | |
910 static void simple_move32(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
911 if (src.first()->is_stack()) { | |
912 if (dst.first()->is_stack()) { | |
913 // stack to stack | |
914 // __ ld(FP, reg2offset(src.first()) + STACK_BIAS, L5); | |
915 // __ st(L5, SP, reg2offset(dst.first()) + STACK_BIAS); | |
304 | 916 __ movl2ptr(rax, Address(rbp, reg2offset_in(src.first()))); |
917 __ movptr(Address(rsp, reg2offset_out(dst.first())), rax); | |
0 | 918 } else { |
919 // stack to reg | |
304 | 920 __ movl2ptr(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()))); |
0 | 921 } |
922 } else if (dst.first()->is_stack()) { | |
923 // reg to stack | |
304 | 924 // no need to sign extend on 64bit |
925 __ movptr(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); | |
0 | 926 } else { |
304 | 927 if (dst.first() != src.first()) { |
928 __ mov(dst.first()->as_Register(), src.first()->as_Register()); | |
929 } | |
0 | 930 } |
931 } | |
932 | |
933 // An oop arg. Must pass a handle not the oop itself | |
934 static void object_move(MacroAssembler* masm, | |
935 OopMap* map, | |
936 int oop_handle_offset, | |
937 int framesize_in_slots, | |
938 VMRegPair src, | |
939 VMRegPair dst, | |
940 bool is_receiver, | |
941 int* receiver_offset) { | |
942 | |
943 // Because of the calling conventions we know that src can be a | |
944 // register or a stack location. dst can only be a stack location. | |
945 | |
946 assert(dst.first()->is_stack(), "must be stack"); | |
947 // must pass a handle. First figure out the location we use as a handle | |
948 | |
949 if (src.first()->is_stack()) { | |
950 // Oop is already on the stack as an argument | |
951 Register rHandle = rax; | |
952 Label nil; | |
304 | 953 __ xorptr(rHandle, rHandle); |
954 __ cmpptr(Address(rbp, reg2offset_in(src.first())), (int32_t)NULL_WORD); | |
0 | 955 __ jcc(Assembler::equal, nil); |
304 | 956 __ lea(rHandle, Address(rbp, reg2offset_in(src.first()))); |
0 | 957 __ bind(nil); |
304 | 958 __ movptr(Address(rsp, reg2offset_out(dst.first())), rHandle); |
0 | 959 |
960 int offset_in_older_frame = src.first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); | |
961 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + framesize_in_slots)); | |
962 if (is_receiver) { | |
963 *receiver_offset = (offset_in_older_frame + framesize_in_slots) * VMRegImpl::stack_slot_size; | |
964 } | |
965 } else { | |
966 // Oop is in an a register we must store it to the space we reserve | |
967 // on the stack for oop_handles | |
968 const Register rOop = src.first()->as_Register(); | |
969 const Register rHandle = rax; | |
970 int oop_slot = (rOop == rcx ? 0 : 1) * VMRegImpl::slots_per_word + oop_handle_offset; | |
971 int offset = oop_slot*VMRegImpl::stack_slot_size; | |
972 Label skip; | |
304 | 973 __ movptr(Address(rsp, offset), rOop); |
0 | 974 map->set_oop(VMRegImpl::stack2reg(oop_slot)); |
304 | 975 __ xorptr(rHandle, rHandle); |
976 __ cmpptr(rOop, (int32_t)NULL_WORD); | |
0 | 977 __ jcc(Assembler::equal, skip); |
304 | 978 __ lea(rHandle, Address(rsp, offset)); |
0 | 979 __ bind(skip); |
980 // Store the handle parameter | |
304 | 981 __ movptr(Address(rsp, reg2offset_out(dst.first())), rHandle); |
0 | 982 if (is_receiver) { |
983 *receiver_offset = offset; | |
984 } | |
985 } | |
986 } | |
987 | |
988 // A float arg may have to do float reg int reg conversion | |
989 static void float_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
990 assert(!src.second()->is_valid() && !dst.second()->is_valid(), "bad float_move"); | |
991 | |
992 // Because of the calling convention we know that src is either a stack location | |
993 // or an xmm register. dst can only be a stack location. | |
994 | |
995 assert(dst.first()->is_stack() && ( src.first()->is_stack() || src.first()->is_XMMRegister()), "bad parameters"); | |
996 | |
997 if (src.first()->is_stack()) { | |
998 __ movl(rax, Address(rbp, reg2offset_in(src.first()))); | |
304 | 999 __ movptr(Address(rsp, reg2offset_out(dst.first())), rax); |
0 | 1000 } else { |
1001 // reg to stack | |
1002 __ movflt(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); | |
1003 } | |
1004 } | |
1005 | |
1006 // A long move | |
1007 static void long_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1008 | |
1009 // The only legal possibility for a long_move VMRegPair is: | |
1010 // 1: two stack slots (possibly unaligned) | |
1011 // as neither the java or C calling convention will use registers | |
1012 // for longs. | |
1013 | |
1014 if (src.first()->is_stack() && dst.first()->is_stack()) { | |
1015 assert(src.second()->is_stack() && dst.second()->is_stack(), "must be all stack"); | |
304 | 1016 __ movptr(rax, Address(rbp, reg2offset_in(src.first()))); |
1017 NOT_LP64(__ movptr(rbx, Address(rbp, reg2offset_in(src.second())))); | |
1018 __ movptr(Address(rsp, reg2offset_out(dst.first())), rax); | |
1019 NOT_LP64(__ movptr(Address(rsp, reg2offset_out(dst.second())), rbx)); | |
0 | 1020 } else { |
1021 ShouldNotReachHere(); | |
1022 } | |
1023 } | |
1024 | |
1025 // A double move | |
1026 static void double_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1027 | |
1028 // The only legal possibilities for a double_move VMRegPair are: | |
1029 // The painful thing here is that like long_move a VMRegPair might be | |
1030 | |
1031 // Because of the calling convention we know that src is either | |
1032 // 1: a single physical register (xmm registers only) | |
1033 // 2: two stack slots (possibly unaligned) | |
1034 // dst can only be a pair of stack slots. | |
1035 | |
1036 assert(dst.first()->is_stack() && (src.first()->is_XMMRegister() || src.first()->is_stack()), "bad args"); | |
1037 | |
1038 if (src.first()->is_stack()) { | |
1039 // source is all stack | |
304 | 1040 __ movptr(rax, Address(rbp, reg2offset_in(src.first()))); |
1041 NOT_LP64(__ movptr(rbx, Address(rbp, reg2offset_in(src.second())))); | |
1042 __ movptr(Address(rsp, reg2offset_out(dst.first())), rax); | |
1043 NOT_LP64(__ movptr(Address(rsp, reg2offset_out(dst.second())), rbx)); | |
0 | 1044 } else { |
1045 // reg to stack | |
1046 // No worries about stack alignment | |
1047 __ movdbl(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); | |
1048 } | |
1049 } | |
1050 | |
1051 | |
1052 void SharedRuntime::save_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1053 // We always ignore the frame_slots arg and just use the space just below frame pointer | |
1054 // which by this time is free to use | |
1055 switch (ret_type) { | |
1056 case T_FLOAT: | |
1057 __ fstp_s(Address(rbp, -wordSize)); | |
1058 break; | |
1059 case T_DOUBLE: | |
1060 __ fstp_d(Address(rbp, -2*wordSize)); | |
1061 break; | |
1062 case T_VOID: break; | |
1063 case T_LONG: | |
304 | 1064 __ movptr(Address(rbp, -wordSize), rax); |
1065 NOT_LP64(__ movptr(Address(rbp, -2*wordSize), rdx)); | |
0 | 1066 break; |
1067 default: { | |
304 | 1068 __ movptr(Address(rbp, -wordSize), rax); |
0 | 1069 } |
1070 } | |
1071 } | |
1072 | |
1073 void SharedRuntime::restore_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1074 // We always ignore the frame_slots arg and just use the space just below frame pointer | |
1075 // which by this time is free to use | |
1076 switch (ret_type) { | |
1077 case T_FLOAT: | |
1078 __ fld_s(Address(rbp, -wordSize)); | |
1079 break; | |
1080 case T_DOUBLE: | |
1081 __ fld_d(Address(rbp, -2*wordSize)); | |
1082 break; | |
1083 case T_LONG: | |
304 | 1084 __ movptr(rax, Address(rbp, -wordSize)); |
1085 NOT_LP64(__ movptr(rdx, Address(rbp, -2*wordSize))); | |
0 | 1086 break; |
1087 case T_VOID: break; | |
1088 default: { | |
304 | 1089 __ movptr(rax, Address(rbp, -wordSize)); |
0 | 1090 } |
1091 } | |
1092 } | |
1093 | |
4873
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1094 |
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1095 static void save_or_restore_arguments(MacroAssembler* masm, |
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1096 const int stack_slots, |
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1097 const int total_in_args, |
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1098 const int arg_save_area, |
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1099 OopMap* map, |
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1100 VMRegPair* in_regs, |
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1101 BasicType* in_sig_bt) { |
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1102 // if map is non-NULL then the code should store the values, |
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1103 // otherwise it should load them. |
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1104 int handle_index = 0; |
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1105 // Save down double word first |
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1106 for ( int i = 0; i < total_in_args; i++) { |
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1107 if (in_regs[i].first()->is_XMMRegister() && in_sig_bt[i] == T_DOUBLE) { |
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1108 int slot = handle_index * VMRegImpl::slots_per_word + arg_save_area; |
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1109 int offset = slot * VMRegImpl::stack_slot_size; |
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1110 handle_index += 2; |
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1111 assert(handle_index <= stack_slots, "overflow"); |
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1112 if (map != NULL) { |
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1113 __ movdbl(Address(rsp, offset), in_regs[i].first()->as_XMMRegister()); |
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1114 } else { |
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1115 __ movdbl(in_regs[i].first()->as_XMMRegister(), Address(rsp, offset)); |
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1116 } |
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1117 } |
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1118 if (in_regs[i].first()->is_Register() && in_sig_bt[i] == T_LONG) { |
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1119 int slot = handle_index * VMRegImpl::slots_per_word + arg_save_area; |
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1120 int offset = slot * VMRegImpl::stack_slot_size; |
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1121 handle_index += 2; |
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1122 assert(handle_index <= stack_slots, "overflow"); |
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1123 if (map != NULL) { |
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1124 __ movl(Address(rsp, offset), in_regs[i].first()->as_Register()); |
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1125 if (in_regs[i].second()->is_Register()) { |
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1126 __ movl(Address(rsp, offset + 4), in_regs[i].second()->as_Register()); |
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1127 } |
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1128 } else { |
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1129 __ movl(in_regs[i].first()->as_Register(), Address(rsp, offset)); |
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1130 if (in_regs[i].second()->is_Register()) { |
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1131 __ movl(in_regs[i].second()->as_Register(), Address(rsp, offset + 4)); |
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1132 } |
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1133 } |
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1134 } |
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1135 } |
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1136 // Save or restore single word registers |
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1137 for ( int i = 0; i < total_in_args; i++) { |
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1138 if (in_regs[i].first()->is_Register()) { |
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1139 int slot = handle_index++ * VMRegImpl::slots_per_word + arg_save_area; |
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1140 int offset = slot * VMRegImpl::stack_slot_size; |
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1141 assert(handle_index <= stack_slots, "overflow"); |
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1142 if (in_sig_bt[i] == T_ARRAY && map != NULL) { |
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1143 map->set_oop(VMRegImpl::stack2reg(slot));; |
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1144 } |
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1145 |
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1146 // Value is in an input register pass we must flush it to the stack |
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1147 const Register reg = in_regs[i].first()->as_Register(); |
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1148 switch (in_sig_bt[i]) { |
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1149 case T_ARRAY: |
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1150 if (map != NULL) { |
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1151 __ movptr(Address(rsp, offset), reg); |
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1152 } else { |
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1153 __ movptr(reg, Address(rsp, offset)); |
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1154 } |
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1155 break; |
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1156 case T_BOOLEAN: |
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1157 case T_CHAR: |
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1158 case T_BYTE: |
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1159 case T_SHORT: |
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1160 case T_INT: |
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1161 if (map != NULL) { |
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1162 __ movl(Address(rsp, offset), reg); |
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1163 } else { |
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1164 __ movl(reg, Address(rsp, offset)); |
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1165 } |
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1166 break; |
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1167 case T_OBJECT: |
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1168 default: ShouldNotReachHere(); |
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1169 } |
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1170 } else if (in_regs[i].first()->is_XMMRegister()) { |
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1171 if (in_sig_bt[i] == T_FLOAT) { |
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1172 int slot = handle_index++ * VMRegImpl::slots_per_word + arg_save_area; |
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1173 int offset = slot * VMRegImpl::stack_slot_size; |
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1174 assert(handle_index <= stack_slots, "overflow"); |
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1175 if (map != NULL) { |
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1176 __ movflt(Address(rsp, offset), in_regs[i].first()->as_XMMRegister()); |
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1177 } else { |
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1178 __ movflt(in_regs[i].first()->as_XMMRegister(), Address(rsp, offset)); |
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1179 } |
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1180 } |
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1181 } else if (in_regs[i].first()->is_stack()) { |
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1182 if (in_sig_bt[i] == T_ARRAY && map != NULL) { |
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1183 int offset_in_older_frame = in_regs[i].first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); |
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1184 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + stack_slots)); |
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1185 } |
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1186 } |
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1187 } |
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1188 } |
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1189 |
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1190 // Check GC_locker::needs_gc and enter the runtime if it's true. This |
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1191 // keeps a new JNI critical region from starting until a GC has been |
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1192 // forced. Save down any oops in registers and describe them in an |
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1193 // OopMap. |
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1194 static void check_needs_gc_for_critical_native(MacroAssembler* masm, |
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1195 Register thread, |
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1196 int stack_slots, |
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1197 int total_c_args, |
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1198 int total_in_args, |
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1199 int arg_save_area, |
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1200 OopMapSet* oop_maps, |
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1201 VMRegPair* in_regs, |
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1202 BasicType* in_sig_bt) { |
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1203 __ block_comment("check GC_locker::needs_gc"); |
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1204 Label cont; |
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1205 __ cmp8(ExternalAddress((address)GC_locker::needs_gc_address()), false); |
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1206 __ jcc(Assembler::equal, cont); |
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1207 |
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1208 // Save down any incoming oops and call into the runtime to halt for a GC |
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1209 |
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1210 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); |
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1211 |
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1212 save_or_restore_arguments(masm, stack_slots, total_in_args, |
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1213 arg_save_area, map, in_regs, in_sig_bt); |
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1214 |
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1215 address the_pc = __ pc(); |
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1216 oop_maps->add_gc_map( __ offset(), map); |
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1217 __ set_last_Java_frame(thread, rsp, noreg, the_pc); |
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1218 |
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1219 __ block_comment("block_for_jni_critical"); |
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1220 __ push(thread); |
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1221 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::block_for_jni_critical))); |
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1222 __ increment(rsp, wordSize); |
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1223 |
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1224 __ get_thread(thread); |
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1225 __ reset_last_Java_frame(thread, false, true); |
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1226 |
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1227 save_or_restore_arguments(masm, stack_slots, total_in_args, |
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1228 arg_save_area, NULL, in_regs, in_sig_bt); |
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1229 |
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1230 __ bind(cont); |
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1231 #ifdef ASSERT |
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1232 if (StressCriticalJNINatives) { |
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1233 // Stress register saving |
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1234 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); |
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1235 save_or_restore_arguments(masm, stack_slots, total_in_args, |
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1236 arg_save_area, map, in_regs, in_sig_bt); |
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1237 // Destroy argument registers |
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1238 for (int i = 0; i < total_in_args - 1; i++) { |
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1239 if (in_regs[i].first()->is_Register()) { |
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1240 const Register reg = in_regs[i].first()->as_Register(); |
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1241 __ xorptr(reg, reg); |
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1242 } else if (in_regs[i].first()->is_XMMRegister()) { |
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1243 __ xorpd(in_regs[i].first()->as_XMMRegister(), in_regs[i].first()->as_XMMRegister()); |
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1244 } else if (in_regs[i].first()->is_FloatRegister()) { |
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1245 ShouldNotReachHere(); |
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1246 } else if (in_regs[i].first()->is_stack()) { |
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1247 // Nothing to do |
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1248 } else { |
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1249 ShouldNotReachHere(); |
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1250 } |
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1251 if (in_sig_bt[i] == T_LONG || in_sig_bt[i] == T_DOUBLE) { |
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1252 i++; |
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1253 } |
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1254 } |
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1255 |
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1256 save_or_restore_arguments(masm, stack_slots, total_in_args, |
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1257 arg_save_area, NULL, in_regs, in_sig_bt); |
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1258 } |
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1259 #endif |
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1260 } |
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1261 |
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1262 // Unpack an array argument into a pointer to the body and the length |
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1263 // if the array is non-null, otherwise pass 0 for both. |
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1264 static void unpack_array_argument(MacroAssembler* masm, VMRegPair reg, BasicType in_elem_type, VMRegPair body_arg, VMRegPair length_arg) { |
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1265 Register tmp_reg = rax; |
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1266 assert(!body_arg.first()->is_Register() || body_arg.first()->as_Register() != tmp_reg, |
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1267 "possible collision"); |
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1268 assert(!length_arg.first()->is_Register() || length_arg.first()->as_Register() != tmp_reg, |
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1269 "possible collision"); |
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1270 |
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1271 // Pass the length, ptr pair |
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1272 Label is_null, done; |
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1273 VMRegPair tmp(tmp_reg->as_VMReg()); |
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1274 if (reg.first()->is_stack()) { |
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1275 // Load the arg up from the stack |
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1276 simple_move32(masm, reg, tmp); |
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1277 reg = tmp; |
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1278 } |
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1279 __ testptr(reg.first()->as_Register(), reg.first()->as_Register()); |
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1280 __ jccb(Assembler::equal, is_null); |
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1281 __ lea(tmp_reg, Address(reg.first()->as_Register(), arrayOopDesc::base_offset_in_bytes(in_elem_type))); |
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1282 simple_move32(masm, tmp, body_arg); |
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1283 // load the length relative to the body. |
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1284 __ movl(tmp_reg, Address(tmp_reg, arrayOopDesc::length_offset_in_bytes() - |
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1285 arrayOopDesc::base_offset_in_bytes(in_elem_type))); |
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1286 simple_move32(masm, tmp, length_arg); |
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1287 __ jmpb(done); |
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1288 __ bind(is_null); |
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1289 // Pass zeros |
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1290 __ xorptr(tmp_reg, tmp_reg); |
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1291 simple_move32(masm, tmp, body_arg); |
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1292 simple_move32(masm, tmp, length_arg); |
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1293 __ bind(done); |
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1294 } |
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1295 |
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1296 |
0 | 1297 // --------------------------------------------------------------------------- |
1298 // Generate a native wrapper for a given method. The method takes arguments | |
1299 // in the Java compiled code convention, marshals them to the native | |
1300 // convention (handlizes oops, etc), transitions to native, makes the call, | |
1301 // returns to java state (possibly blocking), unhandlizes any result and | |
1302 // returns. | |
4873
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1303 // |
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1304 // Critical native functions are a shorthand for the use of |
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1305 // GetPrimtiveArrayCritical and disallow the use of any other JNI |
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1306 // functions. The wrapper is expected to unpack the arguments before |
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1307 // passing them to the callee and perform checks before and after the |
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1308 // native call to ensure that they GC_locker |
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1309 // lock_critical/unlock_critical semantics are followed. Some other |
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1310 // parts of JNI setup are skipped like the tear down of the JNI handle |
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1311 // block and the check for pending exceptions it's impossible for them |
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1312 // to be thrown. |
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1313 // |
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1314 // They are roughly structured like this: |
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1315 // if (GC_locker::needs_gc()) |
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1316 // SharedRuntime::block_for_jni_critical(); |
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1317 // tranistion to thread_in_native |
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1318 // unpack arrray arguments and call native entry point |
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1319 // check for safepoint in progress |
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1320 // check if any thread suspend flags are set |
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1321 // call into JVM and possible unlock the JNI critical |
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1322 // if a GC was suppressed while in the critical native. |
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1323 // transition back to thread_in_Java |
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1324 // return to caller |
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1325 // |
0 | 1326 nmethod *SharedRuntime::generate_native_wrapper(MacroAssembler *masm, |
1327 methodHandle method, | |
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1328 int compile_id, |
0 | 1329 int total_in_args, |
1330 int comp_args_on_stack, | |
1331 BasicType *in_sig_bt, | |
1332 VMRegPair *in_regs, | |
1333 BasicType ret_type) { | |
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1334 bool is_critical_native = true; |
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1335 address native_func = method->critical_native_function(); |
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1336 if (native_func == NULL) { |
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1337 native_func = method->native_function(); |
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1338 is_critical_native = false; |
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1339 } |
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1340 assert(native_func != NULL, "must have function"); |
0 | 1341 |
1342 // An OopMap for lock (and class if static) | |
1343 OopMapSet *oop_maps = new OopMapSet(); | |
1344 | |
1345 // We have received a description of where all the java arg are located | |
1346 // on entry to the wrapper. We need to convert these args to where | |
1347 // the jni function will expect them. To figure out where they go | |
1348 // we convert the java signature to a C signature by inserting | |
1349 // the hidden arguments as arg[0] and possibly arg[1] (static method) | |
1350 | |
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1351 int total_c_args = total_in_args; |
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1352 if (!is_critical_native) { |
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1353 total_c_args += 1; |
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1354 if (method->is_static()) { |
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1355 total_c_args++; |
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1356 } |
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1357 } else { |
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1358 for (int i = 0; i < total_in_args; i++) { |
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1359 if (in_sig_bt[i] == T_ARRAY) { |
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1360 total_c_args++; |
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1361 } |
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1362 } |
0 | 1363 } |
1364 | |
1365 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_c_args); | |
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1366 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_c_args); |
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1367 BasicType* in_elem_bt = NULL; |
0 | 1368 |
1369 int argc = 0; | |
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1370 if (!is_critical_native) { |
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1371 out_sig_bt[argc++] = T_ADDRESS; |
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1372 if (method->is_static()) { |
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1373 out_sig_bt[argc++] = T_OBJECT; |
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1374 } |
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1375 |
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1376 for (int i = 0; i < total_in_args ; i++ ) { |
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1377 out_sig_bt[argc++] = in_sig_bt[i]; |
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1378 } |
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1379 } else { |
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1380 Thread* THREAD = Thread::current(); |
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1381 in_elem_bt = NEW_RESOURCE_ARRAY(BasicType, total_in_args); |
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1382 SignatureStream ss(method->signature()); |
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1383 for (int i = 0; i < total_in_args ; i++ ) { |
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1384 if (in_sig_bt[i] == T_ARRAY) { |
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1385 // Arrays are passed as int, elem* pair |
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1386 out_sig_bt[argc++] = T_INT; |
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1387 out_sig_bt[argc++] = T_ADDRESS; |
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1388 Symbol* atype = ss.as_symbol(CHECK_NULL); |
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1389 const char* at = atype->as_C_string(); |
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1390 if (strlen(at) == 2) { |
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1391 assert(at[0] == '[', "must be"); |
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1392 switch (at[1]) { |
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1393 case 'B': in_elem_bt[i] = T_BYTE; break; |
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1394 case 'C': in_elem_bt[i] = T_CHAR; break; |
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1395 case 'D': in_elem_bt[i] = T_DOUBLE; break; |
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1396 case 'F': in_elem_bt[i] = T_FLOAT; break; |
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1397 case 'I': in_elem_bt[i] = T_INT; break; |
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1398 case 'J': in_elem_bt[i] = T_LONG; break; |
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1399 case 'S': in_elem_bt[i] = T_SHORT; break; |
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1400 case 'Z': in_elem_bt[i] = T_BOOLEAN; break; |
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1401 default: ShouldNotReachHere(); |
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1402 } |
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1403 } |
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1404 } else { |
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1405 out_sig_bt[argc++] = in_sig_bt[i]; |
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1406 in_elem_bt[i] = T_VOID; |
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1407 } |
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1408 if (in_sig_bt[i] != T_VOID) { |
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1409 assert(in_sig_bt[i] == ss.type(), "must match"); |
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1410 ss.next(); |
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1411 } |
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1412 } |
0 | 1413 } |
1414 | |
1415 // Now figure out where the args must be stored and how much stack space | |
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1416 // they require. |
0 | 1417 int out_arg_slots; |
1418 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); | |
1419 | |
1420 // Compute framesize for the wrapper. We need to handlize all oops in | |
1421 // registers a max of 2 on x86. | |
1422 | |
1423 // Calculate the total number of stack slots we will need. | |
1424 | |
1425 // First count the abi requirement plus all of the outgoing args | |
1426 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; | |
1427 | |
1428 // Now the space for the inbound oop handle area | |
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1429 int total_save_slots = 2 * VMRegImpl::slots_per_word; // 2 arguments passed in registers |
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1430 if (is_critical_native) { |
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1431 // Critical natives may have to call out so they need a save area |
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1432 // for register arguments. |
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1433 int double_slots = 0; |
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1434 int single_slots = 0; |
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1435 for ( int i = 0; i < total_in_args; i++) { |
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1436 if (in_regs[i].first()->is_Register()) { |
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1437 const Register reg = in_regs[i].first()->as_Register(); |
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1438 switch (in_sig_bt[i]) { |
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1439 case T_ARRAY: |
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1440 case T_BOOLEAN: |
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1441 case T_BYTE: |
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1442 case T_SHORT: |
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1443 case T_CHAR: |
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1444 case T_INT: single_slots++; break; |
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1445 case T_LONG: double_slots++; break; |
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1446 default: ShouldNotReachHere(); |
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1447 } |
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1448 } else if (in_regs[i].first()->is_XMMRegister()) { |
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1449 switch (in_sig_bt[i]) { |
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1450 case T_FLOAT: single_slots++; break; |
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1451 case T_DOUBLE: double_slots++; break; |
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1452 default: ShouldNotReachHere(); |
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1453 } |
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1454 } else if (in_regs[i].first()->is_FloatRegister()) { |
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1455 ShouldNotReachHere(); |
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1456 } |
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1457 } |
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1458 total_save_slots = double_slots * 2 + single_slots; |
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1459 // align the save area |
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1460 if (double_slots != 0) { |
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1461 stack_slots = round_to(stack_slots, 2); |
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1462 } |
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1463 } |
0 | 1464 |
1465 int oop_handle_offset = stack_slots; | |
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1466 stack_slots += total_save_slots; |
0 | 1467 |
1468 // Now any space we need for handlizing a klass if static method | |
1469 | |
1470 int klass_slot_offset = 0; | |
1471 int klass_offset = -1; | |
1472 int lock_slot_offset = 0; | |
1473 bool is_static = false; | |
1474 | |
1475 if (method->is_static()) { | |
1476 klass_slot_offset = stack_slots; | |
1477 stack_slots += VMRegImpl::slots_per_word; | |
1478 klass_offset = klass_slot_offset * VMRegImpl::stack_slot_size; | |
1479 is_static = true; | |
1480 } | |
1481 | |
1482 // Plus a lock if needed | |
1483 | |
1484 if (method->is_synchronized()) { | |
1485 lock_slot_offset = stack_slots; | |
1486 stack_slots += VMRegImpl::slots_per_word; | |
1487 } | |
1488 | |
1489 // Now a place (+2) to save return values or temp during shuffling | |
1490 // + 2 for return address (which we own) and saved rbp, | |
1491 stack_slots += 4; | |
1492 | |
1493 // Ok The space we have allocated will look like: | |
1494 // | |
1495 // | |
1496 // FP-> | | | |
1497 // |---------------------| | |
1498 // | 2 slots for moves | | |
1499 // |---------------------| | |
1500 // | lock box (if sync) | | |
1501 // |---------------------| <- lock_slot_offset (-lock_slot_rbp_offset) | |
1502 // | klass (if static) | | |
1503 // |---------------------| <- klass_slot_offset | |
1504 // | oopHandle area | | |
1505 // |---------------------| <- oop_handle_offset (a max of 2 registers) | |
1506 // | outbound memory | | |
1507 // | based arguments | | |
1508 // | | | |
1509 // |---------------------| | |
1510 // | | | |
1511 // SP-> | out_preserved_slots | | |
1512 // | |
1513 // | |
1514 // **************************************************************************** | |
1515 // WARNING - on Windows Java Natives use pascal calling convention and pop the | |
1516 // arguments off of the stack after the jni call. Before the call we can use | |
1517 // instructions that are SP relative. After the jni call we switch to FP | |
1518 // relative instructions instead of re-adjusting the stack on windows. | |
1519 // **************************************************************************** | |
1520 | |
1521 | |
1522 // Now compute actual number of stack words we need rounding to make | |
1523 // stack properly aligned. | |
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1524 stack_slots = round_to(stack_slots, StackAlignmentInSlots); |
0 | 1525 |
1526 int stack_size = stack_slots * VMRegImpl::stack_slot_size; | |
1527 | |
1528 intptr_t start = (intptr_t)__ pc(); | |
1529 | |
1530 // First thing make an ic check to see if we should even be here | |
1531 | |
1532 // We are free to use all registers as temps without saving them and | |
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1533 // restoring them except rbp. rbp is the only callee save register |
0 | 1534 // as far as the interpreter and the compiler(s) are concerned. |
1535 | |
1536 | |
1537 const Register ic_reg = rax; | |
1538 const Register receiver = rcx; | |
1539 Label hit; | |
1540 Label exception_pending; | |
1541 | |
1542 __ verify_oop(receiver); | |
304 | 1543 __ cmpptr(ic_reg, Address(receiver, oopDesc::klass_offset_in_bytes())); |
0 | 1544 __ jcc(Assembler::equal, hit); |
1545 | |
1546 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
1547 | |
1548 // verified entry must be aligned for code patching. | |
1549 // and the first 5 bytes must be in the same cache line | |
1550 // if we align at 8 then we will be sure 5 bytes are in the same line | |
1551 __ align(8); | |
1552 | |
1553 __ bind(hit); | |
1554 | |
1555 int vep_offset = ((intptr_t)__ pc()) - start; | |
1556 | |
1557 #ifdef COMPILER1 | |
1558 if (InlineObjectHash && method->intrinsic_id() == vmIntrinsics::_hashCode) { | |
1559 // Object.hashCode can pull the hashCode from the header word | |
1560 // instead of doing a full VM transition once it's been computed. | |
1561 // Since hashCode is usually polymorphic at call sites we can't do | |
1562 // this optimization at the call site without a lot of work. | |
1563 Label slowCase; | |
1564 Register receiver = rcx; | |
1565 Register result = rax; | |
304 | 1566 __ movptr(result, Address(receiver, oopDesc::mark_offset_in_bytes())); |
0 | 1567 |
1568 // check if locked | |
304 | 1569 __ testptr(result, markOopDesc::unlocked_value); |
0 | 1570 __ jcc (Assembler::zero, slowCase); |
1571 | |
1572 if (UseBiasedLocking) { | |
1573 // Check if biased and fall through to runtime if so | |
304 | 1574 __ testptr(result, markOopDesc::biased_lock_bit_in_place); |
0 | 1575 __ jcc (Assembler::notZero, slowCase); |
1576 } | |
1577 | |
1578 // get hash | |
304 | 1579 __ andptr(result, markOopDesc::hash_mask_in_place); |
0 | 1580 // test if hashCode exists |
1581 __ jcc (Assembler::zero, slowCase); | |
304 | 1582 __ shrptr(result, markOopDesc::hash_shift); |
0 | 1583 __ ret(0); |
1584 __ bind (slowCase); | |
1585 } | |
1586 #endif // COMPILER1 | |
1587 | |
1588 // The instruction at the verified entry point must be 5 bytes or longer | |
1589 // because it can be patched on the fly by make_non_entrant. The stack bang | |
1590 // instruction fits that requirement. | |
1591 | |
1592 // Generate stack overflow check | |
1593 | |
1594 if (UseStackBanging) { | |
1595 __ bang_stack_with_offset(StackShadowPages*os::vm_page_size()); | |
1596 } else { | |
1597 // need a 5 byte instruction to allow MT safe patching to non-entrant | |
1598 __ fat_nop(); | |
1599 } | |
1600 | |
1601 // Generate a new frame for the wrapper. | |
1602 __ enter(); | |
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1603 // -2 because return address is already present and so is saved rbp |
304 | 1604 __ subptr(rsp, stack_size - 2*wordSize); |
0 | 1605 |
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1606 // Frame is now completed as far as size and linkage. |
0 | 1607 int frame_complete = ((intptr_t)__ pc()) - start; |
1608 | |
1609 // Calculate the difference between rsp and rbp,. We need to know it | |
1610 // after the native call because on windows Java Natives will pop | |
1611 // the arguments and it is painful to do rsp relative addressing | |
1612 // in a platform independent way. So after the call we switch to | |
1613 // rbp, relative addressing. | |
1614 | |
1615 int fp_adjustment = stack_size - 2*wordSize; | |
1616 | |
1617 #ifdef COMPILER2 | |
1618 // C2 may leave the stack dirty if not in SSE2+ mode | |
1619 if (UseSSE >= 2) { | |
1620 __ verify_FPU(0, "c2i transition should have clean FPU stack"); | |
1621 } else { | |
1622 __ empty_FPU_stack(); | |
1623 } | |
1624 #endif /* COMPILER2 */ | |
1625 | |
1626 // Compute the rbp, offset for any slots used after the jni call | |
1627 | |
1628 int lock_slot_rbp_offset = (lock_slot_offset*VMRegImpl::stack_slot_size) - fp_adjustment; | |
1629 | |
1630 // We use rdi as a thread pointer because it is callee save and | |
1631 // if we load it once it is usable thru the entire wrapper | |
1632 const Register thread = rdi; | |
1633 | |
1634 // We use rsi as the oop handle for the receiver/klass | |
1635 // It is callee save so it survives the call to native | |
1636 | |
1637 const Register oop_handle_reg = rsi; | |
1638 | |
1639 __ get_thread(thread); | |
1640 | |
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1641 if (is_critical_native) { |
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1642 check_needs_gc_for_critical_native(masm, thread, stack_slots, total_c_args, total_in_args, |
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1643 oop_handle_offset, oop_maps, in_regs, in_sig_bt); |
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1644 } |
0 | 1645 |
1646 // | |
1647 // We immediately shuffle the arguments so that any vm call we have to | |
1648 // make from here on out (sync slow path, jvmti, etc.) we will have | |
1649 // captured the oops from our caller and have a valid oopMap for | |
1650 // them. | |
1651 | |
1652 // ----------------- | |
1653 // The Grand Shuffle | |
1654 // | |
1655 // Natives require 1 or 2 extra arguments over the normal ones: the JNIEnv* | |
1656 // and, if static, the class mirror instead of a receiver. This pretty much | |
1657 // guarantees that register layout will not match (and x86 doesn't use reg | |
1658 // parms though amd does). Since the native abi doesn't use register args | |
1659 // and the java conventions does we don't have to worry about collisions. | |
1660 // All of our moved are reg->stack or stack->stack. | |
1661 // We ignore the extra arguments during the shuffle and handle them at the | |
1662 // last moment. The shuffle is described by the two calling convention | |
1663 // vectors we have in our possession. We simply walk the java vector to | |
1664 // get the source locations and the c vector to get the destinations. | |
1665 | |
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1666 int c_arg = is_critical_native ? 0 : (method->is_static() ? 2 : 1 ); |
0 | 1667 |
1668 // Record rsp-based slot for receiver on stack for non-static methods | |
1669 int receiver_offset = -1; | |
1670 | |
1671 // This is a trick. We double the stack slots so we can claim | |
1672 // the oops in the caller's frame. Since we are sure to have | |
1673 // more args than the caller doubling is enough to make | |
1674 // sure we can capture all the incoming oop args from the | |
1675 // caller. | |
1676 // | |
1677 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); | |
1678 | |
1679 // Mark location of rbp, | |
1680 // map->set_callee_saved(VMRegImpl::stack2reg( stack_slots - 2), stack_slots * 2, 0, rbp->as_VMReg()); | |
1681 | |
1682 // We know that we only have args in at most two integer registers (rcx, rdx). So rax, rbx | |
1683 // Are free to temporaries if we have to do stack to steck moves. | |
1684 // All inbound args are referenced based on rbp, and all outbound args via rsp. | |
1685 | |
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1686 for (int i = 0; i < total_in_args ; i++, c_arg++ ) { |
0 | 1687 switch (in_sig_bt[i]) { |
1688 case T_ARRAY: | |
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1689 if (is_critical_native) { |
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1690 unpack_array_argument(masm, in_regs[i], in_elem_bt[i], out_regs[c_arg + 1], out_regs[c_arg]); |
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1691 c_arg++; |
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1692 break; |
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1693 } |
0 | 1694 case T_OBJECT: |
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1695 assert(!is_critical_native, "no oop arguments"); |
0 | 1696 object_move(masm, map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg], |
1697 ((i == 0) && (!is_static)), | |
1698 &receiver_offset); | |
1699 break; | |
1700 case T_VOID: | |
1701 break; | |
1702 | |
1703 case T_FLOAT: | |
1704 float_move(masm, in_regs[i], out_regs[c_arg]); | |
1705 break; | |
1706 | |
1707 case T_DOUBLE: | |
1708 assert( i + 1 < total_in_args && | |
1709 in_sig_bt[i + 1] == T_VOID && | |
1710 out_sig_bt[c_arg+1] == T_VOID, "bad arg list"); | |
1711 double_move(masm, in_regs[i], out_regs[c_arg]); | |
1712 break; | |
1713 | |
1714 case T_LONG : | |
1715 long_move(masm, in_regs[i], out_regs[c_arg]); | |
1716 break; | |
1717 | |
1718 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); | |
1719 | |
1720 default: | |
1721 simple_move32(masm, in_regs[i], out_regs[c_arg]); | |
1722 } | |
1723 } | |
1724 | |
1725 // Pre-load a static method's oop into rsi. Used both by locking code and | |
1726 // the normal JNI call code. | |
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1727 if (method->is_static() && !is_critical_native) { |
0 | 1728 |
1729 // load opp into a register | |
1730 __ movoop(oop_handle_reg, JNIHandles::make_local(Klass::cast(method->method_holder())->java_mirror())); | |
1731 | |
1732 // Now handlize the static class mirror it's known not-null. | |
304 | 1733 __ movptr(Address(rsp, klass_offset), oop_handle_reg); |
0 | 1734 map->set_oop(VMRegImpl::stack2reg(klass_slot_offset)); |
1735 | |
1736 // Now get the handle | |
304 | 1737 __ lea(oop_handle_reg, Address(rsp, klass_offset)); |
0 | 1738 // store the klass handle as second argument |
304 | 1739 __ movptr(Address(rsp, wordSize), oop_handle_reg); |
0 | 1740 } |
1741 | |
1742 // Change state to native (we save the return address in the thread, since it might not | |
1743 // be pushed on the stack when we do a a stack traversal). It is enough that the pc() | |
1744 // points into the right code segment. It does not have to be the correct return pc. | |
1745 // We use the same pc/oopMap repeatedly when we call out | |
1746 | |
1747 intptr_t the_pc = (intptr_t) __ pc(); | |
1748 oop_maps->add_gc_map(the_pc - start, map); | |
1749 | |
1750 __ set_last_Java_frame(thread, rsp, noreg, (address)the_pc); | |
1751 | |
1752 | |
1753 // We have all of the arguments setup at this point. We must not touch any register | |
1754 // argument registers at this point (what if we save/restore them there are no oop? | |
1755 | |
1756 { | |
1757 SkipIfEqual skip_if(masm, &DTraceMethodProbes, 0); | |
1758 __ movoop(rax, JNIHandles::make_local(method())); | |
1759 __ call_VM_leaf( | |
1760 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
1761 thread, rax); | |
1762 } | |
1763 | |
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1764 // RedefineClasses() tracing support for obsolete method entry |
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1765 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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1766 __ movoop(rax, JNIHandles::make_local(method())); |
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1767 __ call_VM_leaf( |
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1768 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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1769 thread, rax); |
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1770 } |
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1771 |
0 | 1772 // These are register definitions we need for locking/unlocking |
1773 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction | |
1774 const Register obj_reg = rcx; // Will contain the oop | |
1775 const Register lock_reg = rdx; // Address of compiler lock object (BasicLock) | |
1776 | |
1777 Label slow_path_lock; | |
1778 Label lock_done; | |
1779 | |
1780 // Lock a synchronized method | |
1781 if (method->is_synchronized()) { | |
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1782 assert(!is_critical_native, "unhandled"); |
0 | 1783 |
1784 | |
1785 const int mark_word_offset = BasicLock::displaced_header_offset_in_bytes(); | |
1786 | |
1787 // Get the handle (the 2nd argument) | |
304 | 1788 __ movptr(oop_handle_reg, Address(rsp, wordSize)); |
0 | 1789 |
1790 // Get address of the box | |
1791 | |
304 | 1792 __ lea(lock_reg, Address(rbp, lock_slot_rbp_offset)); |
0 | 1793 |
1794 // Load the oop from the handle | |
304 | 1795 __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
0 | 1796 |
1797 if (UseBiasedLocking) { | |
1798 // Note that oop_handle_reg is trashed during this call | |
1799 __ biased_locking_enter(lock_reg, obj_reg, swap_reg, oop_handle_reg, false, lock_done, &slow_path_lock); | |
1800 } | |
1801 | |
1802 // Load immediate 1 into swap_reg %rax, | |
304 | 1803 __ movptr(swap_reg, 1); |
0 | 1804 |
1805 // Load (object->mark() | 1) into swap_reg %rax, | |
304 | 1806 __ orptr(swap_reg, Address(obj_reg, 0)); |
0 | 1807 |
1808 // Save (object->mark() | 1) into BasicLock's displaced header | |
304 | 1809 __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
0 | 1810 |
1811 if (os::is_MP()) { | |
1812 __ lock(); | |
1813 } | |
1814 | |
1815 // src -> dest iff dest == rax, else rax, <- dest | |
1816 // *obj_reg = lock_reg iff *obj_reg == rax, else rax, = *(obj_reg) | |
304 | 1817 __ cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
0 | 1818 __ jcc(Assembler::equal, lock_done); |
1819 | |
1820 // Test if the oopMark is an obvious stack pointer, i.e., | |
1821 // 1) (mark & 3) == 0, and | |
1822 // 2) rsp <= mark < mark + os::pagesize() | |
1823 // These 3 tests can be done by evaluating the following | |
1824 // expression: ((mark - rsp) & (3 - os::vm_page_size())), | |
1825 // assuming both stack pointer and pagesize have their | |
1826 // least significant 2 bits clear. | |
1827 // NOTE: the oopMark is in swap_reg %rax, as the result of cmpxchg | |
1828 | |
304 | 1829 __ subptr(swap_reg, rsp); |
1830 __ andptr(swap_reg, 3 - os::vm_page_size()); | |
0 | 1831 |
1832 // Save the test result, for recursive case, the result is zero | |
304 | 1833 __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
0 | 1834 __ jcc(Assembler::notEqual, slow_path_lock); |
1835 // Slow path will re-enter here | |
1836 __ bind(lock_done); | |
1837 | |
1838 if (UseBiasedLocking) { | |
1839 // Re-fetch oop_handle_reg as we trashed it above | |
304 | 1840 __ movptr(oop_handle_reg, Address(rsp, wordSize)); |
0 | 1841 } |
1842 } | |
1843 | |
1844 | |
1845 // Finally just about ready to make the JNI call | |
1846 | |
1847 | |
1848 // get JNIEnv* which is first argument to native | |
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1849 if (!is_critical_native) { |
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1850 __ lea(rdx, Address(thread, in_bytes(JavaThread::jni_environment_offset()))); |
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1851 __ movptr(Address(rsp, 0), rdx); |
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1852 } |
0 | 1853 |
1854 // Now set thread in native | |
1855 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native); | |
1856 | |
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1857 __ call(RuntimeAddress(native_func)); |
0 | 1858 |
1859 // WARNING - on Windows Java Natives use pascal calling convention and pop the | |
1860 // arguments off of the stack. We could just re-adjust the stack pointer here | |
1861 // and continue to do SP relative addressing but we instead switch to FP | |
1862 // relative addressing. | |
1863 | |
1864 // Unpack native results. | |
1865 switch (ret_type) { | |
1866 case T_BOOLEAN: __ c2bool(rax); break; | |
304 | 1867 case T_CHAR : __ andptr(rax, 0xFFFF); break; |
0 | 1868 case T_BYTE : __ sign_extend_byte (rax); break; |
1869 case T_SHORT : __ sign_extend_short(rax); break; | |
1870 case T_INT : /* nothing to do */ break; | |
1871 case T_DOUBLE : | |
1872 case T_FLOAT : | |
1873 // Result is in st0 we'll save as needed | |
1874 break; | |
1875 case T_ARRAY: // Really a handle | |
1876 case T_OBJECT: // Really a handle | |
1877 break; // can't de-handlize until after safepoint check | |
1878 case T_VOID: break; | |
1879 case T_LONG: break; | |
1880 default : ShouldNotReachHere(); | |
1881 } | |
1882 | |
1883 // Switch thread to "native transition" state before reading the synchronization state. | |
1884 // This additional state is necessary because reading and testing the synchronization | |
1885 // state is not atomic w.r.t. GC, as this scenario demonstrates: | |
1886 // Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted. | |
1887 // VM thread changes sync state to synchronizing and suspends threads for GC. | |
1888 // Thread A is resumed to finish this native method, but doesn't block here since it | |
1889 // didn't see any synchronization is progress, and escapes. | |
1890 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native_trans); | |
1891 | |
1892 if(os::is_MP()) { | |
1893 if (UseMembar) { | |
304 | 1894 // Force this write out before the read below |
1895 __ membar(Assembler::Membar_mask_bits( | |
1896 Assembler::LoadLoad | Assembler::LoadStore | | |
1897 Assembler::StoreLoad | Assembler::StoreStore)); | |
0 | 1898 } else { |
1899 // Write serialization page so VM thread can do a pseudo remote membar. | |
1900 // We use the current thread pointer to calculate a thread specific | |
1901 // offset to write to within the page. This minimizes bus traffic | |
1902 // due to cache line collision. | |
1903 __ serialize_memory(thread, rcx); | |
1904 } | |
1905 } | |
1906 | |
1907 if (AlwaysRestoreFPU) { | |
1908 // Make sure the control word is correct. | |
1909 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); | |
1910 } | |
1911 | |
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1912 Label after_transition; |
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1913 |
0 | 1914 // check for safepoint operation in progress and/or pending suspend requests |
1915 { Label Continue; | |
1916 | |
1917 __ cmp32(ExternalAddress((address)SafepointSynchronize::address_of_state()), | |
1918 SafepointSynchronize::_not_synchronized); | |
1919 | |
1920 Label L; | |
1921 __ jcc(Assembler::notEqual, L); | |
1922 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0); | |
1923 __ jcc(Assembler::equal, Continue); | |
1924 __ bind(L); | |
1925 | |
1926 // Don't use call_VM as it will see a possible pending exception and forward it | |
1927 // and never return here preventing us from clearing _last_native_pc down below. | |
1928 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are | |
1929 // preserved and correspond to the bcp/locals pointers. So we do a runtime call | |
1930 // by hand. | |
1931 // | |
1932 save_native_result(masm, ret_type, stack_slots); | |
304 | 1933 __ push(thread); |
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1934 if (!is_critical_native) { |
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1935 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, |
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1936 JavaThread::check_special_condition_for_native_trans))); |
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1937 } else { |
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1938 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, |
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1939 JavaThread::check_special_condition_for_native_trans_and_transition))); |
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1940 } |
0 | 1941 __ increment(rsp, wordSize); |
1942 // Restore any method result value | |
1943 restore_native_result(masm, ret_type, stack_slots); | |
1944 | |
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1945 if (is_critical_native) { |
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1946 // The call above performed the transition to thread_in_Java so |
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1947 // skip the transition logic below. |
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1948 __ jmpb(after_transition); |
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1949 } |
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1950 |
0 | 1951 __ bind(Continue); |
1952 } | |
1953 | |
1954 // change thread state | |
1955 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java); | |
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1956 __ bind(after_transition); |
0 | 1957 |
1958 Label reguard; | |
1959 Label reguard_done; | |
1960 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled); | |
1961 __ jcc(Assembler::equal, reguard); | |
1962 | |
1963 // slow path reguard re-enters here | |
1964 __ bind(reguard_done); | |
1965 | |
1966 // Handle possible exception (will unlock if necessary) | |
1967 | |
1968 // native result if any is live | |
1969 | |
1970 // Unlock | |
1971 Label slow_path_unlock; | |
1972 Label unlock_done; | |
1973 if (method->is_synchronized()) { | |
1974 | |
1975 Label done; | |
1976 | |
1977 // Get locked oop from the handle we passed to jni | |
304 | 1978 __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
0 | 1979 |
1980 if (UseBiasedLocking) { | |
1981 __ biased_locking_exit(obj_reg, rbx, done); | |
1982 } | |
1983 | |
1984 // Simple recursive lock? | |
1985 | |
304 | 1986 __ cmpptr(Address(rbp, lock_slot_rbp_offset), (int32_t)NULL_WORD); |
0 | 1987 __ jcc(Assembler::equal, done); |
1988 | |
1989 // Must save rax, if if it is live now because cmpxchg must use it | |
1990 if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { | |
1991 save_native_result(masm, ret_type, stack_slots); | |
1992 } | |
1993 | |
1994 // get old displaced header | |
304 | 1995 __ movptr(rbx, Address(rbp, lock_slot_rbp_offset)); |
0 | 1996 |
1997 // get address of the stack lock | |
304 | 1998 __ lea(rax, Address(rbp, lock_slot_rbp_offset)); |
0 | 1999 |
2000 // Atomic swap old header if oop still contains the stack lock | |
2001 if (os::is_MP()) { | |
2002 __ lock(); | |
2003 } | |
2004 | |
2005 // src -> dest iff dest == rax, else rax, <- dest | |
2006 // *obj_reg = rbx, iff *obj_reg == rax, else rax, = *(obj_reg) | |
304 | 2007 __ cmpxchgptr(rbx, Address(obj_reg, 0)); |
0 | 2008 __ jcc(Assembler::notEqual, slow_path_unlock); |
2009 | |
2010 // slow path re-enters here | |
2011 __ bind(unlock_done); | |
2012 if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { | |
2013 restore_native_result(masm, ret_type, stack_slots); | |
2014 } | |
2015 | |
2016 __ bind(done); | |
2017 | |
2018 } | |
2019 | |
2020 { | |
2021 SkipIfEqual skip_if(masm, &DTraceMethodProbes, 0); | |
2022 // Tell dtrace about this method exit | |
2023 save_native_result(masm, ret_type, stack_slots); | |
2024 __ movoop(rax, JNIHandles::make_local(method())); | |
2025 __ call_VM_leaf( | |
2026 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
2027 thread, rax); | |
2028 restore_native_result(masm, ret_type, stack_slots); | |
2029 } | |
2030 | |
2031 // We can finally stop using that last_Java_frame we setup ages ago | |
2032 | |
2033 __ reset_last_Java_frame(thread, false, true); | |
2034 | |
2035 // Unpack oop result | |
2036 if (ret_type == T_OBJECT || ret_type == T_ARRAY) { | |
2037 Label L; | |
304 | 2038 __ cmpptr(rax, (int32_t)NULL_WORD); |
0 | 2039 __ jcc(Assembler::equal, L); |
304 | 2040 __ movptr(rax, Address(rax, 0)); |
0 | 2041 __ bind(L); |
2042 __ verify_oop(rax); | |
2043 } | |
2044 | |
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2045 if (!is_critical_native) { |
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2046 // reset handle block |
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2047 __ movptr(rcx, Address(thread, JavaThread::active_handles_offset())); |
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2048 __ movptr(Address(rcx, JNIHandleBlock::top_offset_in_bytes()), NULL_WORD); |
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2049 |
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2050 // Any exception pending? |
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2051 __ cmpptr(Address(thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
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2052 __ jcc(Assembler::notEqual, exception_pending); |
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2053 } |
0 | 2054 |
2055 // no exception, we're almost done | |
2056 | |
2057 // check that only result value is on FPU stack | |
2058 __ verify_FPU(ret_type == T_FLOAT || ret_type == T_DOUBLE ? 1 : 0, "native_wrapper normal exit"); | |
2059 | |
2060 // Fixup floating pointer results so that result looks like a return from a compiled method | |
2061 if (ret_type == T_FLOAT) { | |
2062 if (UseSSE >= 1) { | |
2063 // Pop st0 and store as float and reload into xmm register | |
2064 __ fstp_s(Address(rbp, -4)); | |
2065 __ movflt(xmm0, Address(rbp, -4)); | |
2066 } | |
2067 } else if (ret_type == T_DOUBLE) { | |
2068 if (UseSSE >= 2) { | |
2069 // Pop st0 and store as double and reload into xmm register | |
2070 __ fstp_d(Address(rbp, -8)); | |
2071 __ movdbl(xmm0, Address(rbp, -8)); | |
2072 } | |
2073 } | |
2074 | |
2075 // Return | |
2076 | |
2077 __ leave(); | |
2078 __ ret(0); | |
2079 | |
2080 // Unexpected paths are out of line and go here | |
2081 | |
2082 // Slow path locking & unlocking | |
2083 if (method->is_synchronized()) { | |
2084 | |
2085 // BEGIN Slow path lock | |
2086 | |
2087 __ bind(slow_path_lock); | |
2088 | |
2089 // has last_Java_frame setup. No exceptions so do vanilla call not call_VM | |
2090 // args are (oop obj, BasicLock* lock, JavaThread* thread) | |
304 | 2091 __ push(thread); |
2092 __ push(lock_reg); | |
2093 __ push(obj_reg); | |
0 | 2094 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_locking_C))); |
304 | 2095 __ addptr(rsp, 3*wordSize); |
0 | 2096 |
2097 #ifdef ASSERT | |
2098 { Label L; | |
304 | 2099 __ cmpptr(Address(thread, in_bytes(Thread::pending_exception_offset())), (int)NULL_WORD); |
0 | 2100 __ jcc(Assembler::equal, L); |
2101 __ stop("no pending exception allowed on exit from monitorenter"); | |
2102 __ bind(L); | |
2103 } | |
2104 #endif | |
2105 __ jmp(lock_done); | |
2106 | |
2107 // END Slow path lock | |
2108 | |
2109 // BEGIN Slow path unlock | |
2110 __ bind(slow_path_unlock); | |
2111 | |
2112 // Slow path unlock | |
2113 | |
2114 if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { | |
2115 save_native_result(masm, ret_type, stack_slots); | |
2116 } | |
2117 // Save pending exception around call to VM (which contains an EXCEPTION_MARK) | |
2118 | |
304 | 2119 __ pushptr(Address(thread, in_bytes(Thread::pending_exception_offset()))); |
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2120 __ movptr(Address(thread, in_bytes(Thread::pending_exception_offset())), NULL_WORD); |
0 | 2121 |
2122 | |
2123 // should be a peal | |
2124 // +wordSize because of the push above | |
304 | 2125 __ lea(rax, Address(rbp, lock_slot_rbp_offset)); |
2126 __ push(rax); | |
2127 | |
2128 __ push(obj_reg); | |
0 | 2129 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_unlocking_C))); |
304 | 2130 __ addptr(rsp, 2*wordSize); |
0 | 2131 #ifdef ASSERT |
2132 { | |
2133 Label L; | |
304 | 2134 __ cmpptr(Address(thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
0 | 2135 __ jcc(Assembler::equal, L); |
2136 __ stop("no pending exception allowed on exit complete_monitor_unlocking_C"); | |
2137 __ bind(L); | |
2138 } | |
2139 #endif /* ASSERT */ | |
2140 | |
304 | 2141 __ popptr(Address(thread, in_bytes(Thread::pending_exception_offset()))); |
0 | 2142 |
2143 if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { | |
2144 restore_native_result(masm, ret_type, stack_slots); | |
2145 } | |
2146 __ jmp(unlock_done); | |
2147 // END Slow path unlock | |
2148 | |
2149 } | |
2150 | |
2151 // SLOW PATH Reguard the stack if needed | |
2152 | |
2153 __ bind(reguard); | |
2154 save_native_result(masm, ret_type, stack_slots); | |
2155 { | |
2156 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); | |
2157 } | |
2158 restore_native_result(masm, ret_type, stack_slots); | |
2159 __ jmp(reguard_done); | |
2160 | |
2161 | |
2162 // BEGIN EXCEPTION PROCESSING | |
2163 | |
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2164 if (!is_critical_native) { |
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2165 // Forward the exception |
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2166 __ bind(exception_pending); |
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2167 |
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2168 // remove possible return value from FPU register stack |
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2169 __ empty_FPU_stack(); |
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2170 |
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2171 // pop our frame |
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2172 __ leave(); |
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2173 // and forward the exception |
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2174 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
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2175 } |
0 | 2176 |
2177 __ flush(); | |
2178 | |
2179 nmethod *nm = nmethod::new_native_nmethod(method, | |
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2180 compile_id, |
0 | 2181 masm->code(), |
2182 vep_offset, | |
2183 frame_complete, | |
2184 stack_slots / VMRegImpl::slots_per_word, | |
2185 (is_static ? in_ByteSize(klass_offset) : in_ByteSize(receiver_offset)), | |
2186 in_ByteSize(lock_slot_offset*VMRegImpl::stack_slot_size), | |
2187 oop_maps); | |
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2188 |
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2189 if (is_critical_native) { |
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2190 nm->set_lazy_critical_native(true); |
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2191 } |
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2192 |
0 | 2193 return nm; |
2194 | |
2195 } | |
2196 | |
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2197 #ifdef HAVE_DTRACE_H |
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2198 // --------------------------------------------------------------------------- |
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2199 // Generate a dtrace nmethod for a given signature. The method takes arguments |
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2200 // in the Java compiled code convention, marshals them to the native |
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2201 // abi and then leaves nops at the position you would expect to call a native |
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2202 // function. When the probe is enabled the nops are replaced with a trap |
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2203 // instruction that dtrace inserts and the trace will cause a notification |
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2204 // to dtrace. |
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2205 // |
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2206 // The probes are only able to take primitive types and java/lang/String as |
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2207 // arguments. No other java types are allowed. Strings are converted to utf8 |
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2208 // strings so that from dtrace point of view java strings are converted to C |
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2209 // strings. There is an arbitrary fixed limit on the total space that a method |
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2210 // can use for converting the strings. (256 chars per string in the signature). |
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2211 // So any java string larger then this is truncated. |
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2212 |
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2213 nmethod *SharedRuntime::generate_dtrace_nmethod( |
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2214 MacroAssembler *masm, methodHandle method) { |
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2215 |
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2216 // generate_dtrace_nmethod is guarded by a mutex so we are sure to |
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2217 // be single threaded in this method. |
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2218 assert(AdapterHandlerLibrary_lock->owned_by_self(), "must be"); |
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2219 |
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2220 // Fill in the signature array, for the calling-convention call. |
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2221 int total_args_passed = method->size_of_parameters(); |
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2222 |
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2223 BasicType* in_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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2224 VMRegPair *in_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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2225 |
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2226 // The signature we are going to use for the trap that dtrace will see |
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2227 // java/lang/String is converted. We drop "this" and any other object |
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2228 // is converted to NULL. (A one-slot java/lang/Long object reference |
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2229 // is converted to a two-slot long, which is why we double the allocation). |
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2230 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed * 2); |
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2231 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed * 2); |
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2232 |
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2233 int i=0; |
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2234 int total_strings = 0; |
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2235 int first_arg_to_pass = 0; |
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2236 int total_c_args = 0; |
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2237 |
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2238 if( !method->is_static() ) { // Pass in receiver first |
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2239 in_sig_bt[i++] = T_OBJECT; |
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2240 first_arg_to_pass = 1; |
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2241 } |
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2242 |
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2243 // We need to convert the java args to where a native (non-jni) function |
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2244 // would expect them. To figure out where they go we convert the java |
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2245 // signature to a C signature. |
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2246 |
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2247 SignatureStream ss(method->signature()); |
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2248 for ( ; !ss.at_return_type(); ss.next()) { |
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2249 BasicType bt = ss.type(); |
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2250 in_sig_bt[i++] = bt; // Collect remaining bits of signature |
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2251 out_sig_bt[total_c_args++] = bt; |
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2252 if( bt == T_OBJECT) { |
2177
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2253 Symbol* s = ss.as_symbol_or_null(); // symbol is created |
116
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2254 if (s == vmSymbols::java_lang_String()) { |
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2255 total_strings++; |
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2256 out_sig_bt[total_c_args-1] = T_ADDRESS; |
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2257 } else if (s == vmSymbols::java_lang_Boolean() || |
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2258 s == vmSymbols::java_lang_Character() || |
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2259 s == vmSymbols::java_lang_Byte() || |
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2260 s == vmSymbols::java_lang_Short() || |
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2261 s == vmSymbols::java_lang_Integer() || |
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2262 s == vmSymbols::java_lang_Float()) { |
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2263 out_sig_bt[total_c_args-1] = T_INT; |
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2264 } else if (s == vmSymbols::java_lang_Long() || |
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2265 s == vmSymbols::java_lang_Double()) { |
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2266 out_sig_bt[total_c_args-1] = T_LONG; |
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2267 out_sig_bt[total_c_args++] = T_VOID; |
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2268 } |
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2269 } else if ( bt == T_LONG || bt == T_DOUBLE ) { |
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2270 in_sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2271 out_sig_bt[total_c_args++] = T_VOID; |
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2272 } |
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2273 } |
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2274 |
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2275 assert(i==total_args_passed, "validly parsed signature"); |
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2276 |
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2277 // Now get the compiled-Java layout as input arguments |
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2278 int comp_args_on_stack; |
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2279 comp_args_on_stack = SharedRuntime::java_calling_convention( |
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2280 in_sig_bt, in_regs, total_args_passed, false); |
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2281 |
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2282 // Now figure out where the args must be stored and how much stack space |
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2283 // they require (neglecting out_preserve_stack_slots). |
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2284 |
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2285 int out_arg_slots; |
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2286 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); |
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2287 |
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2288 // Calculate the total number of stack slots we will need. |
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2289 |
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2290 // First count the abi requirement plus all of the outgoing args |
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2291 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; |
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2292 |
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2293 // Now space for the string(s) we must convert |
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2294 |
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2295 int* string_locs = NEW_RESOURCE_ARRAY(int, total_strings + 1); |
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2296 for (i = 0; i < total_strings ; i++) { |
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2297 string_locs[i] = stack_slots; |
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2298 stack_slots += max_dtrace_string_size / VMRegImpl::stack_slot_size; |
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2299 } |
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2300 |
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2301 // + 2 for return address (which we own) and saved rbp, |
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2302 |
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2303 stack_slots += 2; |
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2304 |
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2305 // Ok The space we have allocated will look like: |
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2306 // |
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2307 // |
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2308 // FP-> | | |
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2309 // |---------------------| |
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2310 // | string[n] | |
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2311 // |---------------------| <- string_locs[n] |
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2312 // | string[n-1] | |
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2313 // |---------------------| <- string_locs[n-1] |
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2314 // | ... | |
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2315 // | ... | |
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2316 // |---------------------| <- string_locs[1] |
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2317 // | string[0] | |
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2318 // |---------------------| <- string_locs[0] |
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2319 // | outbound memory | |
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2320 // | based arguments | |
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2321 // | | |
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2322 // |---------------------| |
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2323 // | | |
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2324 // SP-> | out_preserved_slots | |
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2325 // |
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2326 // |
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2327 |
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2328 // Now compute actual number of stack words we need rounding to make |
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2329 // stack properly aligned. |
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2330 stack_slots = round_to(stack_slots, 2 * VMRegImpl::slots_per_word); |
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2331 |
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2332 int stack_size = stack_slots * VMRegImpl::stack_slot_size; |
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2333 |
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2334 intptr_t start = (intptr_t)__ pc(); |
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2335 |
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2336 // First thing make an ic check to see if we should even be here |
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2337 |
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2338 // We are free to use all registers as temps without saving them and |
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2339 // restoring them except rbp. rbp, is the only callee save register |
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2340 // as far as the interpreter and the compiler(s) are concerned. |
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2341 |
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2342 const Register ic_reg = rax; |
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2343 const Register receiver = rcx; |
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2344 Label hit; |
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2345 Label exception_pending; |
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2346 |
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2347 |
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2348 __ verify_oop(receiver); |
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2349 __ cmpl(ic_reg, Address(receiver, oopDesc::klass_offset_in_bytes())); |
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2350 __ jcc(Assembler::equal, hit); |
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2351 |
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2352 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); |
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2353 |
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2354 // verified entry must be aligned for code patching. |
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2355 // and the first 5 bytes must be in the same cache line |
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2356 // if we align at 8 then we will be sure 5 bytes are in the same line |
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|
2357 __ align(8); |
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|
2358 |
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2359 __ bind(hit); |
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|
2360 |
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2361 int vep_offset = ((intptr_t)__ pc()) - start; |
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2362 |
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2363 |
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2364 // The instruction at the verified entry point must be 5 bytes or longer |
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2365 // because it can be patched on the fly by make_non_entrant. The stack bang |
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2366 // instruction fits that requirement. |
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2367 |
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2368 // Generate stack overflow check |
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|
2369 |
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2370 |
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2371 if (UseStackBanging) { |
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2372 if (stack_size <= StackShadowPages*os::vm_page_size()) { |
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2373 __ bang_stack_with_offset(StackShadowPages*os::vm_page_size()); |
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2374 } else { |
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2375 __ movl(rax, stack_size); |
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2376 __ bang_stack_size(rax, rbx); |
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2377 } |
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|
2378 } else { |
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2379 // need a 5 byte instruction to allow MT safe patching to non-entrant |
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|
2380 __ fat_nop(); |
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|
2381 } |
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|
2382 |
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2383 assert(((int)__ pc() - start - vep_offset) >= 5, |
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2384 "valid size for make_non_entrant"); |
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2385 |
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2386 // Generate a new frame for the wrapper. |
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|
2387 __ enter(); |
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|
2388 |
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2389 // -2 because return address is already present and so is saved rbp, |
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|
2390 if (stack_size - 2*wordSize != 0) { |
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|
2391 __ subl(rsp, stack_size - 2*wordSize); |
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0
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|
2392 } |
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|
2393 |
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2394 // Frame is now completed as far a size and linkage. |
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|
2395 |
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2396 int frame_complete = ((intptr_t)__ pc()) - start; |
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|
2397 |
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2398 // First thing we do store all the args as if we are doing the call. |
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2399 // Since the C calling convention is stack based that ensures that |
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2400 // all the Java register args are stored before we need to convert any |
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2401 // string we might have. |
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|
2402 |
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|
2403 int sid = 0; |
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|
2404 int c_arg, j_arg; |
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|
2405 int string_reg = 0; |
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|
2406 |
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|
2407 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2408 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2409 |
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2410 VMRegPair src = in_regs[j_arg]; |
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2411 VMRegPair dst = out_regs[c_arg]; |
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2412 assert(dst.first()->is_stack() || in_sig_bt[j_arg] == T_VOID, |
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|
2413 "stack based abi assumed"); |
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|
2414 |
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|
2415 switch (in_sig_bt[j_arg]) { |
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0
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|
2416 |
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0
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|
2417 case T_ARRAY: |
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kamg
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0
diff
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|
2418 case T_OBJECT: |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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0
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|
2419 if (out_sig_bt[c_arg] == T_ADDRESS) { |
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|
2420 // Any register based arg for a java string after the first |
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0
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|
2421 // will be destroyed by the call to get_utf so we store |
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0
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|
2422 // the original value in the location the utf string address |
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|
2423 // will eventually be stored. |
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|
2424 if (src.first()->is_reg()) { |
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0
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|
2425 if (string_reg++ != 0) { |
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|
2426 simple_move32(masm, src, dst); |
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0
diff
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|
2427 } |
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kamg
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0
diff
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|
2428 } |
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kamg
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0
diff
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|
2429 } else if (out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
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0
diff
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|
2430 // need to unbox a one-word value |
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0
diff
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|
2431 Register in_reg = rax; |
018d5b58dd4f
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0
diff
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|
2432 if ( src.first()->is_reg() ) { |
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kamg
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0
diff
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|
2433 in_reg = src.first()->as_Register(); |
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0
diff
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|
2434 } else { |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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0
diff
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|
2435 simple_move32(masm, src, in_reg->as_VMReg()); |
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kamg
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0
diff
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|
2436 } |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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0
diff
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|
2437 Label skipUnbox; |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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0
diff
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|
2438 __ movl(Address(rsp, reg2offset_out(dst.first())), NULL_WORD); |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
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|
2439 if ( out_sig_bt[c_arg] == T_LONG ) { |
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kamg
parents:
0
diff
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|
2440 __ movl(Address(rsp, reg2offset_out(dst.second())), NULL_WORD); |
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kamg
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0
diff
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|
2441 } |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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0
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|
2442 __ testl(in_reg, in_reg); |
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0
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|
2443 __ jcc(Assembler::zero, skipUnbox); |
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0
diff
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|
2444 assert(dst.first()->is_stack() && |
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0
diff
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|
2445 (!dst.second()->is_valid() || dst.second()->is_stack()), |
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0
diff
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|
2446 "value(s) must go into stack slots"); |
165
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
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116
diff
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|
2447 |
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
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|
2448 BasicType bt = out_sig_bt[c_arg]; |
437d03ea40b1
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kvn
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116
diff
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|
2449 int box_offset = java_lang_boxing_object::value_offset_in_bytes(bt); |
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
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diff
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|
2450 if ( bt == T_LONG ) { |
116
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|
2451 __ movl(rbx, Address(in_reg, |
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0
diff
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|
2452 box_offset + VMRegImpl::stack_slot_size)); |
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0
diff
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|
2453 __ movl(Address(rsp, reg2offset_out(dst.second())), rbx); |
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kamg
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0
diff
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|
2454 } |
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0
diff
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|
2455 __ movl(in_reg, Address(in_reg, box_offset)); |
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0
diff
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|
2456 __ movl(Address(rsp, reg2offset_out(dst.first())), in_reg); |
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|
2457 __ bind(skipUnbox); |
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0
diff
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|
2458 } else { |
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|
2459 // Convert the arg to NULL |
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0
diff
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|
2460 __ movl(Address(rsp, reg2offset_out(dst.first())), NULL_WORD); |
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kamg
parents:
0
diff
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|
2461 } |
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diff
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|
2462 if (out_sig_bt[c_arg] == T_LONG) { |
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0
diff
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|
2463 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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0
diff
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|
2464 ++c_arg; // Move over the T_VOID To keep the loop indices in sync |
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kamg
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0
diff
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|
2465 } |
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0
diff
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|
2466 break; |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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diff
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|
2467 |
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|
2468 case T_VOID: |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
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|
2469 break; |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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parents:
0
diff
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|
2470 |
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0
diff
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|
2471 case T_FLOAT: |
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0
diff
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|
2472 float_move(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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0
diff
changeset
|
2473 break; |
018d5b58dd4f
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0
diff
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|
2474 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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0
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|
2475 case T_DOUBLE: |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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|
2476 assert( j_arg + 1 < total_args_passed && |
018d5b58dd4f
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0
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|
2477 in_sig_bt[j_arg + 1] == T_VOID, "bad arg list"); |
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|
2478 double_move(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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0
diff
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|
2479 break; |
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0
diff
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|
2480 |
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0
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|
2481 case T_LONG : |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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0
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|
2482 long_move(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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0
diff
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|
2483 break; |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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0
diff
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|
2484 |
018d5b58dd4f
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|
2485 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); |
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kamg
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0
diff
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|
2486 |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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0
diff
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|
2487 default: |
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0
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|
2488 simple_move32(masm, src, dst); |
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0
diff
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|
2489 } |
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0
diff
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|
2490 } |
018d5b58dd4f
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0
diff
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|
2491 |
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|
2492 // Now we must convert any string we have to utf8 |
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0
diff
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|
2493 // |
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0
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|
2494 |
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|
2495 for (sid = 0, j_arg = first_arg_to_pass, c_arg = 0 ; |
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|
2496 sid < total_strings ; j_arg++, c_arg++ ) { |
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0
diff
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|
2497 |
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|
2498 if (out_sig_bt[c_arg] == T_ADDRESS) { |
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kamg
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0
diff
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|
2499 |
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|
2500 Address utf8_addr = Address( |
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|
2501 rsp, string_locs[sid++] * VMRegImpl::stack_slot_size); |
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kamg
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0
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|
2502 __ leal(rax, utf8_addr); |
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0
diff
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|
2503 |
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|
2504 // The first string we find might still be in the original java arg |
018d5b58dd4f
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0
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|
2505 // register |
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|
2506 VMReg orig_loc = in_regs[j_arg].first(); |
018d5b58dd4f
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0
diff
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|
2507 Register string_oop; |
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0
diff
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|
2508 |
018d5b58dd4f
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|
2509 // This is where the argument will eventually reside |
018d5b58dd4f
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|
2510 Address dest = Address(rsp, reg2offset_out(out_regs[c_arg].first())); |
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kamg
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0
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|
2511 |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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|
2512 if (sid == 1 && orig_loc->is_reg()) { |
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0
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|
2513 string_oop = orig_loc->as_Register(); |
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0
diff
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|
2514 assert(string_oop != rax, "smashed arg"); |
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kamg
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0
diff
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|
2515 } else { |
018d5b58dd4f
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kamg
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0
diff
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|
2516 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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0
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|
2517 if (orig_loc->is_reg()) { |
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0
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|
2518 // Get the copy of the jls object |
018d5b58dd4f
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|
2519 __ movl(rcx, dest); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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0
diff
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|
2520 } else { |
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diff
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|
2521 // arg is still in the original location |
018d5b58dd4f
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0
diff
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|
2522 __ movl(rcx, Address(rbp, reg2offset_in(orig_loc))); |
018d5b58dd4f
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kamg
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0
diff
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|
2523 } |
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0
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|
2524 string_oop = rcx; |
018d5b58dd4f
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kamg
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0
diff
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|
2525 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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0
diff
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|
2526 } |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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0
diff
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|
2527 Label nullString; |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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0
diff
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|
2528 __ movl(dest, NULL_WORD); |
018d5b58dd4f
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0
diff
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|
2529 __ testl(string_oop, string_oop); |
018d5b58dd4f
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0
diff
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|
2530 __ jcc(Assembler::zero, nullString); |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2531 |
018d5b58dd4f
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0
diff
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|
2532 // Now we can store the address of the utf string as the argument |
018d5b58dd4f
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kamg
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0
diff
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|
2533 __ movl(dest, rax); |
018d5b58dd4f
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kamg
parents:
0
diff
changeset
|
2534 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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0
diff
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|
2535 // And do the conversion |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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0
diff
changeset
|
2536 __ call_VM_leaf(CAST_FROM_FN_PTR( |
018d5b58dd4f
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kamg
parents:
0
diff
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|
2537 address, SharedRuntime::get_utf), string_oop, rax); |
018d5b58dd4f
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kamg
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0
diff
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|
2538 __ bind(nullString); |
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kamg
parents:
0
diff
changeset
|
2539 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2540 |
018d5b58dd4f
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0
diff
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|
2541 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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0
diff
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|
2542 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
018d5b58dd4f
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kamg
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0
diff
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|
2543 ++c_arg; // Move over the T_VOID To keep the loop indices in sync |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2544 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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0
diff
changeset
|
2545 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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0
diff
changeset
|
2546 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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0
diff
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|
2547 |
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0
diff
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|
2548 // Ok now we are done. Need to place the nop that dtrace wants in order to |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
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|
2549 // patch in the trap |
018d5b58dd4f
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0
diff
changeset
|
2550 |
018d5b58dd4f
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0
diff
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|
2551 int patch_offset = ((intptr_t)__ pc()) - start; |
018d5b58dd4f
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kamg
parents:
0
diff
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|
2552 |
018d5b58dd4f
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kamg
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0
diff
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|
2553 __ nop(); |
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0
diff
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|
2554 |
018d5b58dd4f
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0
diff
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|
2555 |
018d5b58dd4f
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parents:
0
diff
changeset
|
2556 // Return |
018d5b58dd4f
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0
diff
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|
2557 |
018d5b58dd4f
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0
diff
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|
2558 __ leave(); |
018d5b58dd4f
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0
diff
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|
2559 __ ret(0); |
018d5b58dd4f
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0
diff
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|
2560 |
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0
diff
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|
2561 __ flush(); |
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0
diff
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|
2562 |
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|
2563 nmethod *nm = nmethod::new_dtrace_nmethod( |
018d5b58dd4f
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0
diff
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|
2564 method, masm->code(), vep_offset, patch_offset, frame_complete, |
018d5b58dd4f
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|
2565 stack_slots / VMRegImpl::slots_per_word); |
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0
diff
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|
2566 return nm; |
018d5b58dd4f
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0
diff
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|
2567 |
018d5b58dd4f
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|
2568 } |
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|
2569 |
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|
2570 #endif // HAVE_DTRACE_H |
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|
2571 |
0 | 2572 // this function returns the adjust size (in number of words) to a c2i adapter |
2573 // activation for use during deoptimization | |
2574 int Deoptimization::last_frame_adjust(int callee_parameters, int callee_locals ) { | |
1506 | 2575 return (callee_locals - callee_parameters) * Interpreter::stackElementWords; |
0 | 2576 } |
2577 | |
2578 | |
2579 uint SharedRuntime::out_preserve_stack_slots() { | |
2580 return 0; | |
2581 } | |
2582 | |
2583 | |
2584 //------------------------------generate_deopt_blob---------------------------- | |
2585 void SharedRuntime::generate_deopt_blob() { | |
2586 // allocate space for the code | |
2587 ResourceMark rm; | |
2588 // setup code generation tools | |
2589 CodeBuffer buffer("deopt_blob", 1024, 1024); | |
2590 MacroAssembler* masm = new MacroAssembler(&buffer); | |
2591 int frame_size_in_words; | |
2592 OopMap* map = NULL; | |
2593 // Account for the extra args we place on the stack | |
2594 // by the time we call fetch_unroll_info | |
2595 const int additional_words = 2; // deopt kind, thread | |
2596 | |
2597 OopMapSet *oop_maps = new OopMapSet(); | |
2598 | |
2599 // ------------- | |
2600 // This code enters when returning to a de-optimized nmethod. A return | |
2601 // address has been pushed on the the stack, and return values are in | |
2602 // registers. | |
2603 // If we are doing a normal deopt then we were called from the patched | |
2604 // nmethod from the point we returned to the nmethod. So the return | |
2605 // address on the stack is wrong by NativeCall::instruction_size | |
2606 // We will adjust the value to it looks like we have the original return | |
2607 // address on the stack (like when we eagerly deoptimized). | |
2608 // In the case of an exception pending with deoptimized then we enter | |
2609 // with a return address on the stack that points after the call we patched | |
2610 // into the exception handler. We have the following register state: | |
2611 // rax,: exception | |
2612 // rbx,: exception handler | |
2613 // rdx: throwing pc | |
2614 // So in this case we simply jam rdx into the useless return address and | |
2615 // the stack looks just like we want. | |
2616 // | |
2617 // At this point we need to de-opt. We save the argument return | |
2618 // registers. We call the first C routine, fetch_unroll_info(). This | |
2619 // routine captures the return values and returns a structure which | |
2620 // describes the current frame size and the sizes of all replacement frames. | |
2621 // The current frame is compiled code and may contain many inlined | |
2622 // functions, each with their own JVM state. We pop the current frame, then | |
2623 // push all the new frames. Then we call the C routine unpack_frames() to | |
2624 // populate these frames. Finally unpack_frames() returns us the new target | |
2625 // address. Notice that callee-save registers are BLOWN here; they have | |
2626 // already been captured in the vframeArray at the time the return PC was | |
2627 // patched. | |
2628 address start = __ pc(); | |
2629 Label cont; | |
2630 | |
2631 // Prolog for non exception case! | |
2632 | |
2633 // Save everything in sight. | |
2634 | |
926
c8e2135f7e30
6829127: Deoptimization Failure on Specjvm98 _227_mtrt with -XX:+DeoptimizeALot since Hs11 b01
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628
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|
2635 map = RegisterSaver::save_live_registers(masm, additional_words, &frame_size_in_words, false); |
0 | 2636 // Normal deoptimization |
304 | 2637 __ push(Deoptimization::Unpack_deopt); |
0 | 2638 __ jmp(cont); |
2639 | |
2640 int reexecute_offset = __ pc() - start; | |
2641 | |
2642 // Reexecute case | |
2643 // return address is the pc describes what bci to do re-execute at | |
2644 | |
2645 // No need to update map as each call to save_live_registers will produce identical oopmap | |
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2646 (void) RegisterSaver::save_live_registers(masm, additional_words, &frame_size_in_words, false); |
0 | 2647 |
304 | 2648 __ push(Deoptimization::Unpack_reexecute); |
0 | 2649 __ jmp(cont); |
2650 | |
2651 int exception_offset = __ pc() - start; | |
2652 | |
2653 // Prolog for exception case | |
2654 | |
2655 // all registers are dead at this entry point, except for rax, and | |
2656 // rdx which contain the exception oop and exception pc | |
2657 // respectively. Set them in TLS and fall thru to the | |
2658 // unpack_with_exception_in_tls entry point. | |
2659 | |
2660 __ get_thread(rdi); | |
304 | 2661 __ movptr(Address(rdi, JavaThread::exception_pc_offset()), rdx); |
2662 __ movptr(Address(rdi, JavaThread::exception_oop_offset()), rax); | |
0 | 2663 |
2664 int exception_in_tls_offset = __ pc() - start; | |
2665 | |
2666 // new implementation because exception oop is now passed in JavaThread | |
2667 | |
2668 // Prolog for exception case | |
2669 // All registers must be preserved because they might be used by LinearScan | |
2670 // Exceptiop oop and throwing PC are passed in JavaThread | |
2671 // tos: stack at point of call to method that threw the exception (i.e. only | |
2672 // args are on the stack, no return address) | |
2673 | |
2674 // make room on stack for the return address | |
2675 // It will be patched later with the throwing pc. The correct value is not | |
2676 // available now because loading it from memory would destroy registers. | |
304 | 2677 __ push(0); |
0 | 2678 |
2679 // Save everything in sight. | |
2680 | |
2681 // No need to update map as each call to save_live_registers will produce identical oopmap | |
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2682 (void) RegisterSaver::save_live_registers(masm, additional_words, &frame_size_in_words, false); |
0 | 2683 |
2684 // Now it is safe to overwrite any register | |
2685 | |
2686 // store the correct deoptimization type | |
304 | 2687 __ push(Deoptimization::Unpack_exception); |
0 | 2688 |
2689 // load throwing pc from JavaThread and patch it as the return address | |
2690 // of the current frame. Then clear the field in JavaThread | |
2691 __ get_thread(rdi); | |
304 | 2692 __ movptr(rdx, Address(rdi, JavaThread::exception_pc_offset())); |
2693 __ movptr(Address(rbp, wordSize), rdx); | |
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2694 __ movptr(Address(rdi, JavaThread::exception_pc_offset()), NULL_WORD); |
0 | 2695 |
2696 #ifdef ASSERT | |
2697 // verify that there is really an exception oop in JavaThread | |
304 | 2698 __ movptr(rax, Address(rdi, JavaThread::exception_oop_offset())); |
0 | 2699 __ verify_oop(rax); |
2700 | |
2701 // verify that there is no pending exception | |
2702 Label no_pending_exception; | |
304 | 2703 __ movptr(rax, Address(rdi, Thread::pending_exception_offset())); |
2704 __ testptr(rax, rax); | |
0 | 2705 __ jcc(Assembler::zero, no_pending_exception); |
2706 __ stop("must not have pending exception here"); | |
2707 __ bind(no_pending_exception); | |
2708 #endif | |
2709 | |
2710 __ bind(cont); | |
2711 | |
2712 // Compiled code leaves the floating point stack dirty, empty it. | |
2713 __ empty_FPU_stack(); | |
2714 | |
2715 | |
2716 // Call C code. Need thread and this frame, but NOT official VM entry | |
2717 // crud. We cannot block on this call, no GC can happen. | |
2718 __ get_thread(rcx); | |
304 | 2719 __ push(rcx); |
0 | 2720 // fetch_unroll_info needs to call last_java_frame() |
2721 __ set_last_Java_frame(rcx, noreg, noreg, NULL); | |
2722 | |
2723 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::fetch_unroll_info))); | |
2724 | |
2725 // Need to have an oopmap that tells fetch_unroll_info where to | |
2726 // find any register it might need. | |
2727 | |
2728 oop_maps->add_gc_map( __ pc()-start, map); | |
2729 | |
2730 // Discard arg to fetch_unroll_info | |
304 | 2731 __ pop(rcx); |
0 | 2732 |
2733 __ get_thread(rcx); | |
2734 __ reset_last_Java_frame(rcx, false, false); | |
2735 | |
2736 // Load UnrollBlock into EDI | |
304 | 2737 __ mov(rdi, rax); |
0 | 2738 |
2739 // Move the unpack kind to a safe place in the UnrollBlock because | |
2740 // we are very short of registers | |
2741 | |
2742 Address unpack_kind(rdi, Deoptimization::UnrollBlock::unpack_kind_offset_in_bytes()); | |
2743 // retrieve the deopt kind from where we left it. | |
304 | 2744 __ pop(rax); |
0 | 2745 __ movl(unpack_kind, rax); // save the unpack_kind value |
2746 | |
2747 Label noException; | |
2748 __ cmpl(rax, Deoptimization::Unpack_exception); // Was exception pending? | |
2749 __ jcc(Assembler::notEqual, noException); | |
304 | 2750 __ movptr(rax, Address(rcx, JavaThread::exception_oop_offset())); |
2751 __ movptr(rdx, Address(rcx, JavaThread::exception_pc_offset())); | |
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2752 __ movptr(Address(rcx, JavaThread::exception_oop_offset()), NULL_WORD); |
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2753 __ movptr(Address(rcx, JavaThread::exception_pc_offset()), NULL_WORD); |
0 | 2754 |
2755 __ verify_oop(rax); | |
2756 | |
2757 // Overwrite the result registers with the exception results. | |
304 | 2758 __ movptr(Address(rsp, RegisterSaver::raxOffset()*wordSize), rax); |
2759 __ movptr(Address(rsp, RegisterSaver::rdxOffset()*wordSize), rdx); | |
0 | 2760 |
2761 __ bind(noException); | |
2762 | |
2763 // Stack is back to only having register save data on the stack. | |
2764 // Now restore the result registers. Everything else is either dead or captured | |
2765 // in the vframeArray. | |
2766 | |
2767 RegisterSaver::restore_result_registers(masm); | |
2768 | |
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2769 // Non standard control word may be leaked out through a safepoint blob, and we can |
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2770 // deopt at a poll point with the non standard control word. However, we should make |
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2771 // sure the control word is correct after restore_result_registers. |
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2772 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); |
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2773 |
0 | 2774 // All of the register save area has been popped of the stack. Only the |
2775 // return address remains. | |
2776 | |
2777 // Pop all the frames we must move/replace. | |
2778 // | |
2779 // Frame picture (youngest to oldest) | |
2780 // 1: self-frame (no frame link) | |
2781 // 2: deopting frame (no frame link) | |
2782 // 3: caller of deopting frame (could be compiled/interpreted). | |
2783 // | |
2784 // Note: by leaving the return address of self-frame on the stack | |
2785 // and using the size of frame 2 to adjust the stack | |
2786 // when we are done the return to frame 3 will still be on the stack. | |
2787 | |
2788 // Pop deoptimized frame | |
304 | 2789 __ addptr(rsp, Address(rdi,Deoptimization::UnrollBlock::size_of_deoptimized_frame_offset_in_bytes())); |
0 | 2790 |
2791 // sp should be pointing at the return address to the caller (3) | |
2792 | |
2793 // Stack bang to make sure there's enough room for these interpreter frames. | |
2794 if (UseStackBanging) { | |
2795 __ movl(rbx, Address(rdi ,Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); | |
2796 __ bang_stack_size(rbx, rcx); | |
2797 } | |
2798 | |
2799 // Load array of frame pcs into ECX | |
304 | 2800 __ movptr(rcx,Address(rdi,Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); |
2801 | |
2802 __ pop(rsi); // trash the old pc | |
0 | 2803 |
2804 // Load array of frame sizes into ESI | |
304 | 2805 __ movptr(rsi,Address(rdi,Deoptimization::UnrollBlock::frame_sizes_offset_in_bytes())); |
0 | 2806 |
2807 Address counter(rdi, Deoptimization::UnrollBlock::counter_temp_offset_in_bytes()); | |
2808 | |
2809 __ movl(rbx, Address(rdi, Deoptimization::UnrollBlock::number_of_frames_offset_in_bytes())); | |
2810 __ movl(counter, rbx); | |
2811 | |
2812 // Pick up the initial fp we should save | |
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2813 __ movptr(rbp, Address(rdi, Deoptimization::UnrollBlock::initial_info_offset_in_bytes())); |
0 | 2814 |
2815 // Now adjust the caller's stack to make up for the extra locals | |
2816 // but record the original sp so that we can save it in the skeletal interpreter | |
2817 // frame and the stack walking of interpreter_sender will get the unextended sp | |
2818 // value and not the "real" sp value. | |
2819 | |
2820 Address sp_temp(rdi, Deoptimization::UnrollBlock::sender_sp_temp_offset_in_bytes()); | |
304 | 2821 __ movptr(sp_temp, rsp); |
2822 __ movl2ptr(rbx, Address(rdi, Deoptimization::UnrollBlock::caller_adjustment_offset_in_bytes())); | |
2823 __ subptr(rsp, rbx); | |
0 | 2824 |
2825 // Push interpreter frames in a loop | |
2826 Label loop; | |
2827 __ bind(loop); | |
304 | 2828 __ movptr(rbx, Address(rsi, 0)); // Load frame size |
0 | 2829 #ifdef CC_INTERP |
304 | 2830 __ subptr(rbx, 4*wordSize); // we'll push pc and ebp by hand and |
0 | 2831 #ifdef ASSERT |
304 | 2832 __ push(0xDEADDEAD); // Make a recognizable pattern |
2833 __ push(0xDEADDEAD); | |
0 | 2834 #else /* ASSERT */ |
304 | 2835 __ subptr(rsp, 2*wordSize); // skip the "static long no_param" |
0 | 2836 #endif /* ASSERT */ |
2837 #else /* CC_INTERP */ | |
304 | 2838 __ subptr(rbx, 2*wordSize); // we'll push pc and rbp, by hand |
0 | 2839 #endif /* CC_INTERP */ |
304 | 2840 __ pushptr(Address(rcx, 0)); // save return address |
0 | 2841 __ enter(); // save old & set new rbp, |
304 | 2842 __ subptr(rsp, rbx); // Prolog! |
2843 __ movptr(rbx, sp_temp); // sender's sp | |
0 | 2844 #ifdef CC_INTERP |
304 | 2845 __ movptr(Address(rbp, |
0 | 2846 -(sizeof(BytecodeInterpreter)) + in_bytes(byte_offset_of(BytecodeInterpreter, _sender_sp))), |
2847 rbx); // Make it walkable | |
2848 #else /* CC_INTERP */ | |
2849 // This value is corrected by layout_activation_impl | |
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2850 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); |
304 | 2851 __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), rbx); // Make it walkable |
0 | 2852 #endif /* CC_INTERP */ |
304 | 2853 __ movptr(sp_temp, rsp); // pass to next frame |
2854 __ addptr(rsi, wordSize); // Bump array pointer (sizes) | |
2855 __ addptr(rcx, wordSize); // Bump array pointer (pcs) | |
2856 __ decrementl(counter); // decrement counter | |
0 | 2857 __ jcc(Assembler::notZero, loop); |
304 | 2858 __ pushptr(Address(rcx, 0)); // save final return address |
0 | 2859 |
2860 // Re-push self-frame | |
2861 __ enter(); // save old & set new rbp, | |
2862 | |
2863 // Return address and rbp, are in place | |
2864 // We'll push additional args later. Just allocate a full sized | |
2865 // register save area | |
304 | 2866 __ subptr(rsp, (frame_size_in_words-additional_words - 2) * wordSize); |
0 | 2867 |
2868 // Restore frame locals after moving the frame | |
304 | 2869 __ movptr(Address(rsp, RegisterSaver::raxOffset()*wordSize), rax); |
2870 __ movptr(Address(rsp, RegisterSaver::rdxOffset()*wordSize), rdx); | |
0 | 2871 __ fstp_d(Address(rsp, RegisterSaver::fpResultOffset()*wordSize)); // Pop float stack and store in local |
2872 if( UseSSE>=2 ) __ movdbl(Address(rsp, RegisterSaver::xmm0Offset()*wordSize), xmm0); | |
2873 if( UseSSE==1 ) __ movflt(Address(rsp, RegisterSaver::xmm0Offset()*wordSize), xmm0); | |
2874 | |
2875 // Set up the args to unpack_frame | |
2876 | |
2877 __ pushl(unpack_kind); // get the unpack_kind value | |
2878 __ get_thread(rcx); | |
304 | 2879 __ push(rcx); |
0 | 2880 |
2881 // set last_Java_sp, last_Java_fp | |
2882 __ set_last_Java_frame(rcx, noreg, rbp, NULL); | |
2883 | |
2884 // Call C code. Need thread but NOT official VM entry | |
2885 // crud. We cannot block on this call, no GC can happen. Call should | |
2886 // restore return values to their stack-slots with the new SP. | |
2887 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); | |
2888 // Set an oopmap for the call site | |
2889 oop_maps->add_gc_map( __ pc()-start, new OopMap( frame_size_in_words, 0 )); | |
2890 | |
2891 // rax, contains the return result type | |
304 | 2892 __ push(rax); |
0 | 2893 |
2894 __ get_thread(rcx); | |
2895 __ reset_last_Java_frame(rcx, false, false); | |
2896 | |
2897 // Collect return values | |
304 | 2898 __ movptr(rax,Address(rsp, (RegisterSaver::raxOffset() + additional_words + 1)*wordSize)); |
2899 __ movptr(rdx,Address(rsp, (RegisterSaver::rdxOffset() + additional_words + 1)*wordSize)); | |
0 | 2900 |
2901 // Clear floating point stack before returning to interpreter | |
2902 __ empty_FPU_stack(); | |
2903 | |
2904 // Check if we should push the float or double return value. | |
2905 Label results_done, yes_double_value; | |
2906 __ cmpl(Address(rsp, 0), T_DOUBLE); | |
2907 __ jcc (Assembler::zero, yes_double_value); | |
2908 __ cmpl(Address(rsp, 0), T_FLOAT); | |
2909 __ jcc (Assembler::notZero, results_done); | |
2910 | |
2911 // return float value as expected by interpreter | |
2912 if( UseSSE>=1 ) __ movflt(xmm0, Address(rsp, (RegisterSaver::xmm0Offset() + additional_words + 1)*wordSize)); | |
2913 else __ fld_d(Address(rsp, (RegisterSaver::fpResultOffset() + additional_words + 1)*wordSize)); | |
2914 __ jmp(results_done); | |
2915 | |
2916 // return double value as expected by interpreter | |
2917 __ bind(yes_double_value); | |
2918 if( UseSSE>=2 ) __ movdbl(xmm0, Address(rsp, (RegisterSaver::xmm0Offset() + additional_words + 1)*wordSize)); | |
2919 else __ fld_d(Address(rsp, (RegisterSaver::fpResultOffset() + additional_words + 1)*wordSize)); | |
2920 | |
2921 __ bind(results_done); | |
2922 | |
2923 // Pop self-frame. | |
2924 __ leave(); // Epilog! | |
2925 | |
2926 // Jump to interpreter | |
2927 __ ret(0); | |
2928 | |
2929 // ------------- | |
2930 // make sure all code is generated | |
2931 masm->flush(); | |
2932 | |
2933 _deopt_blob = DeoptimizationBlob::create( &buffer, oop_maps, 0, exception_offset, reexecute_offset, frame_size_in_words); | |
2934 _deopt_blob->set_unpack_with_exception_in_tls_offset(exception_in_tls_offset); | |
2935 } | |
2936 | |
2937 | |
2938 #ifdef COMPILER2 | |
2939 //------------------------------generate_uncommon_trap_blob-------------------- | |
2940 void SharedRuntime::generate_uncommon_trap_blob() { | |
2941 // allocate space for the code | |
2942 ResourceMark rm; | |
2943 // setup code generation tools | |
2944 CodeBuffer buffer("uncommon_trap_blob", 512, 512); | |
2945 MacroAssembler* masm = new MacroAssembler(&buffer); | |
2946 | |
2947 enum frame_layout { | |
2948 arg0_off, // thread sp + 0 // Arg location for | |
2949 arg1_off, // unloaded_class_index sp + 1 // calling C | |
2950 // The frame sender code expects that rbp will be in the "natural" place and | |
2951 // will override any oopMap setting for it. We must therefore force the layout | |
2952 // so that it agrees with the frame sender code. | |
2953 rbp_off, // callee saved register sp + 2 | |
2954 return_off, // slot for return address sp + 3 | |
2955 framesize | |
2956 }; | |
2957 | |
2958 address start = __ pc(); | |
2959 // Push self-frame. | |
304 | 2960 __ subptr(rsp, return_off*wordSize); // Epilog! |
0 | 2961 |
2962 // rbp, is an implicitly saved callee saved register (i.e. the calling | |
2963 // convention will save restore it in prolog/epilog) Other than that | |
2964 // there are no callee save registers no that adapter frames are gone. | |
304 | 2965 __ movptr(Address(rsp, rbp_off*wordSize), rbp); |
0 | 2966 |
2967 // Clear the floating point exception stack | |
2968 __ empty_FPU_stack(); | |
2969 | |
2970 // set last_Java_sp | |
2971 __ get_thread(rdx); | |
2972 __ set_last_Java_frame(rdx, noreg, noreg, NULL); | |
2973 | |
2974 // Call C code. Need thread but NOT official VM entry | |
2975 // crud. We cannot block on this call, no GC can happen. Call should | |
2976 // capture callee-saved registers as well as return values. | |
304 | 2977 __ movptr(Address(rsp, arg0_off*wordSize), rdx); |
0 | 2978 // argument already in ECX |
2979 __ movl(Address(rsp, arg1_off*wordSize),rcx); | |
2980 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap))); | |
2981 | |
2982 // Set an oopmap for the call site | |
2983 OopMapSet *oop_maps = new OopMapSet(); | |
2984 OopMap* map = new OopMap( framesize, 0 ); | |
2985 // No oopMap for rbp, it is known implicitly | |
2986 | |
2987 oop_maps->add_gc_map( __ pc()-start, map); | |
2988 | |
2989 __ get_thread(rcx); | |
2990 | |
2991 __ reset_last_Java_frame(rcx, false, false); | |
2992 | |
2993 // Load UnrollBlock into EDI | |
304 | 2994 __ movptr(rdi, rax); |
0 | 2995 |
2996 // Pop all the frames we must move/replace. | |
2997 // | |
2998 // Frame picture (youngest to oldest) | |
2999 // 1: self-frame (no frame link) | |
3000 // 2: deopting frame (no frame link) | |
3001 // 3: caller of deopting frame (could be compiled/interpreted). | |
3002 | |
3003 // Pop self-frame. We have no frame, and must rely only on EAX and ESP. | |
304 | 3004 __ addptr(rsp,(framesize-1)*wordSize); // Epilog! |
0 | 3005 |
3006 // Pop deoptimized frame | |
304 | 3007 __ movl2ptr(rcx, Address(rdi,Deoptimization::UnrollBlock::size_of_deoptimized_frame_offset_in_bytes())); |
3008 __ addptr(rsp, rcx); | |
0 | 3009 |
3010 // sp should be pointing at the return address to the caller (3) | |
3011 | |
3012 // Stack bang to make sure there's enough room for these interpreter frames. | |
3013 if (UseStackBanging) { | |
3014 __ movl(rbx, Address(rdi ,Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); | |
3015 __ bang_stack_size(rbx, rcx); | |
3016 } | |
3017 | |
3018 | |
3019 // Load array of frame pcs into ECX | |
3020 __ movl(rcx,Address(rdi,Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); | |
3021 | |
304 | 3022 __ pop(rsi); // trash the pc |
0 | 3023 |
3024 // Load array of frame sizes into ESI | |
304 | 3025 __ movptr(rsi,Address(rdi,Deoptimization::UnrollBlock::frame_sizes_offset_in_bytes())); |
0 | 3026 |
3027 Address counter(rdi, Deoptimization::UnrollBlock::counter_temp_offset_in_bytes()); | |
3028 | |
3029 __ movl(rbx, Address(rdi, Deoptimization::UnrollBlock::number_of_frames_offset_in_bytes())); | |
3030 __ movl(counter, rbx); | |
3031 | |
3032 // Pick up the initial fp we should save | |
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3033 __ movptr(rbp, Address(rdi, Deoptimization::UnrollBlock::initial_info_offset_in_bytes())); |
0 | 3034 |
3035 // Now adjust the caller's stack to make up for the extra locals | |
3036 // but record the original sp so that we can save it in the skeletal interpreter | |
3037 // frame and the stack walking of interpreter_sender will get the unextended sp | |
3038 // value and not the "real" sp value. | |
3039 | |
3040 Address sp_temp(rdi, Deoptimization::UnrollBlock::sender_sp_temp_offset_in_bytes()); | |
304 | 3041 __ movptr(sp_temp, rsp); |
3042 __ movl(rbx, Address(rdi, Deoptimization::UnrollBlock::caller_adjustment_offset_in_bytes())); | |
3043 __ subptr(rsp, rbx); | |
0 | 3044 |
3045 // Push interpreter frames in a loop | |
3046 Label loop; | |
3047 __ bind(loop); | |
304 | 3048 __ movptr(rbx, Address(rsi, 0)); // Load frame size |
0 | 3049 #ifdef CC_INTERP |
304 | 3050 __ subptr(rbx, 4*wordSize); // we'll push pc and ebp by hand and |
0 | 3051 #ifdef ASSERT |
304 | 3052 __ push(0xDEADDEAD); // Make a recognizable pattern |
3053 __ push(0xDEADDEAD); // (parm to RecursiveInterpreter...) | |
0 | 3054 #else /* ASSERT */ |
304 | 3055 __ subptr(rsp, 2*wordSize); // skip the "static long no_param" |
0 | 3056 #endif /* ASSERT */ |
3057 #else /* CC_INTERP */ | |
304 | 3058 __ subptr(rbx, 2*wordSize); // we'll push pc and rbp, by hand |
0 | 3059 #endif /* CC_INTERP */ |
304 | 3060 __ pushptr(Address(rcx, 0)); // save return address |
0 | 3061 __ enter(); // save old & set new rbp, |
304 | 3062 __ subptr(rsp, rbx); // Prolog! |
3063 __ movptr(rbx, sp_temp); // sender's sp | |
0 | 3064 #ifdef CC_INTERP |
304 | 3065 __ movptr(Address(rbp, |
0 | 3066 -(sizeof(BytecodeInterpreter)) + in_bytes(byte_offset_of(BytecodeInterpreter, _sender_sp))), |
3067 rbx); // Make it walkable | |
3068 #else /* CC_INTERP */ | |
3069 // This value is corrected by layout_activation_impl | |
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3070 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD ); |
304 | 3071 __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), rbx); // Make it walkable |
0 | 3072 #endif /* CC_INTERP */ |
304 | 3073 __ movptr(sp_temp, rsp); // pass to next frame |
3074 __ addptr(rsi, wordSize); // Bump array pointer (sizes) | |
3075 __ addptr(rcx, wordSize); // Bump array pointer (pcs) | |
3076 __ decrementl(counter); // decrement counter | |
0 | 3077 __ jcc(Assembler::notZero, loop); |
304 | 3078 __ pushptr(Address(rcx, 0)); // save final return address |
0 | 3079 |
3080 // Re-push self-frame | |
3081 __ enter(); // save old & set new rbp, | |
304 | 3082 __ subptr(rsp, (framesize-2) * wordSize); // Prolog! |
0 | 3083 |
3084 | |
3085 // set last_Java_sp, last_Java_fp | |
3086 __ get_thread(rdi); | |
3087 __ set_last_Java_frame(rdi, noreg, rbp, NULL); | |
3088 | |
3089 // Call C code. Need thread but NOT official VM entry | |
3090 // crud. We cannot block on this call, no GC can happen. Call should | |
3091 // restore return values to their stack-slots with the new SP. | |
304 | 3092 __ movptr(Address(rsp,arg0_off*wordSize),rdi); |
0 | 3093 __ movl(Address(rsp,arg1_off*wordSize), Deoptimization::Unpack_uncommon_trap); |
3094 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); | |
3095 // Set an oopmap for the call site | |
3096 oop_maps->add_gc_map( __ pc()-start, new OopMap( framesize, 0 ) ); | |
3097 | |
3098 __ get_thread(rdi); | |
3099 __ reset_last_Java_frame(rdi, true, false); | |
3100 | |
3101 // Pop self-frame. | |
3102 __ leave(); // Epilog! | |
3103 | |
3104 // Jump to interpreter | |
3105 __ ret(0); | |
3106 | |
3107 // ------------- | |
3108 // make sure all code is generated | |
3109 masm->flush(); | |
3110 | |
3111 _uncommon_trap_blob = UncommonTrapBlob::create(&buffer, oop_maps, framesize); | |
3112 } | |
3113 #endif // COMPILER2 | |
3114 | |
3115 //------------------------------generate_handler_blob------ | |
3116 // | |
3117 // Generate a special Compile2Runtime blob that saves all registers, | |
3118 // setup oopmap, and calls safepoint code to stop the compiled code for | |
3119 // a safepoint. | |
3120 // | |
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3121 SafepointBlob* SharedRuntime::generate_handler_blob(address call_ptr, bool cause_return) { |
0 | 3122 |
3123 // Account for thread arg in our frame | |
3124 const int additional_words = 1; | |
3125 int frame_size_in_words; | |
3126 | |
3127 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); | |
3128 | |
3129 ResourceMark rm; | |
3130 OopMapSet *oop_maps = new OopMapSet(); | |
3131 OopMap* map; | |
3132 | |
3133 // allocate space for the code | |
3134 // setup code generation tools | |
3135 CodeBuffer buffer("handler_blob", 1024, 512); | |
3136 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3137 | |
3138 const Register java_thread = rdi; // callee-saved for VC++ | |
3139 address start = __ pc(); | |
3140 address call_pc = NULL; | |
3141 | |
3142 // If cause_return is true we are at a poll_return and there is | |
3143 // the return address on the stack to the caller on the nmethod | |
3144 // that is safepoint. We can leave this return on the stack and | |
3145 // effectively complete the return and safepoint in the caller. | |
3146 // Otherwise we push space for a return address that the safepoint | |
3147 // handler will install later to make the stack walking sensible. | |
3148 if( !cause_return ) | |
304 | 3149 __ push(rbx); // Make room for return address (or push it again) |
0 | 3150 |
3151 map = RegisterSaver::save_live_registers(masm, additional_words, &frame_size_in_words, false); | |
3152 | |
3153 // The following is basically a call_VM. However, we need the precise | |
3154 // address of the call in order to generate an oopmap. Hence, we do all the | |
3155 // work ourselves. | |
3156 | |
3157 // Push thread argument and setup last_Java_sp | |
3158 __ get_thread(java_thread); | |
304 | 3159 __ push(java_thread); |
0 | 3160 __ set_last_Java_frame(java_thread, noreg, noreg, NULL); |
3161 | |
3162 // if this was not a poll_return then we need to correct the return address now. | |
3163 if( !cause_return ) { | |
304 | 3164 __ movptr(rax, Address(java_thread, JavaThread::saved_exception_pc_offset())); |
3165 __ movptr(Address(rbp, wordSize), rax); | |
0 | 3166 } |
3167 | |
3168 // do the call | |
3169 __ call(RuntimeAddress(call_ptr)); | |
3170 | |
3171 // Set an oopmap for the call site. This oopmap will map all | |
3172 // oop-registers and debug-info registers as callee-saved. This | |
3173 // will allow deoptimization at this safepoint to find all possible | |
3174 // debug-info recordings, as well as let GC find all oops. | |
3175 | |
3176 oop_maps->add_gc_map( __ pc() - start, map); | |
3177 | |
3178 // Discard arg | |
304 | 3179 __ pop(rcx); |
0 | 3180 |
3181 Label noException; | |
3182 | |
3183 // Clear last_Java_sp again | |
3184 __ get_thread(java_thread); | |
3185 __ reset_last_Java_frame(java_thread, false, false); | |
3186 | |
304 | 3187 __ cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 3188 __ jcc(Assembler::equal, noException); |
3189 | |
3190 // Exception pending | |
3191 | |
3192 RegisterSaver::restore_live_registers(masm); | |
3193 | |
3194 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
3195 | |
3196 __ bind(noException); | |
3197 | |
3198 // Normal exit, register restoring and exit | |
3199 RegisterSaver::restore_live_registers(masm); | |
3200 | |
3201 __ ret(0); | |
3202 | |
3203 // make sure all code is generated | |
3204 masm->flush(); | |
3205 | |
3206 // Fill-out other meta info | |
3207 return SafepointBlob::create(&buffer, oop_maps, frame_size_in_words); | |
3208 } | |
3209 | |
3210 // | |
3211 // generate_resolve_blob - call resolution (static/virtual/opt-virtual/ic-miss | |
3212 // | |
3213 // Generate a stub that calls into vm to find out the proper destination | |
3214 // of a java call. All the argument registers are live at this point | |
3215 // but since this is generic code we don't know what they are and the caller | |
3216 // must do any gc of the args. | |
3217 // | |
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3218 RuntimeStub* SharedRuntime::generate_resolve_blob(address destination, const char* name) { |
0 | 3219 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); |
3220 | |
3221 // allocate space for the code | |
3222 ResourceMark rm; | |
3223 | |
3224 CodeBuffer buffer(name, 1000, 512); | |
3225 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3226 | |
3227 int frame_size_words; | |
3228 enum frame_layout { | |
3229 thread_off, | |
3230 extra_words }; | |
3231 | |
3232 OopMapSet *oop_maps = new OopMapSet(); | |
3233 OopMap* map = NULL; | |
3234 | |
3235 int start = __ offset(); | |
3236 | |
3237 map = RegisterSaver::save_live_registers(masm, extra_words, &frame_size_words); | |
3238 | |
3239 int frame_complete = __ offset(); | |
3240 | |
3241 const Register thread = rdi; | |
3242 __ get_thread(rdi); | |
3243 | |
304 | 3244 __ push(thread); |
0 | 3245 __ set_last_Java_frame(thread, noreg, rbp, NULL); |
3246 | |
3247 __ call(RuntimeAddress(destination)); | |
3248 | |
3249 | |
3250 // Set an oopmap for the call site. | |
3251 // We need this not only for callee-saved registers, but also for volatile | |
3252 // registers that the compiler might be keeping live across a safepoint. | |
3253 | |
3254 oop_maps->add_gc_map( __ offset() - start, map); | |
3255 | |
3256 // rax, contains the address we are going to jump to assuming no exception got installed | |
3257 | |
304 | 3258 __ addptr(rsp, wordSize); |
0 | 3259 |
3260 // clear last_Java_sp | |
3261 __ reset_last_Java_frame(thread, true, false); | |
3262 // check for pending exceptions | |
3263 Label pending; | |
304 | 3264 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 3265 __ jcc(Assembler::notEqual, pending); |
3266 | |
3267 // get the returned methodOop | |
304 | 3268 __ movptr(rbx, Address(thread, JavaThread::vm_result_offset())); |
3269 __ movptr(Address(rsp, RegisterSaver::rbx_offset() * wordSize), rbx); | |
3270 | |
3271 __ movptr(Address(rsp, RegisterSaver::rax_offset() * wordSize), rax); | |
0 | 3272 |
3273 RegisterSaver::restore_live_registers(masm); | |
3274 | |
3275 // We are back the the original state on entry and ready to go. | |
3276 | |
3277 __ jmp(rax); | |
3278 | |
3279 // Pending exception after the safepoint | |
3280 | |
3281 __ bind(pending); | |
3282 | |
3283 RegisterSaver::restore_live_registers(masm); | |
3284 | |
3285 // exception pending => remove activation and forward to exception handler | |
3286 | |
3287 __ get_thread(thread); | |
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3288 __ movptr(Address(thread, JavaThread::vm_result_offset()), NULL_WORD); |
304 | 3289 __ movptr(rax, Address(thread, Thread::pending_exception_offset())); |
0 | 3290 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
3291 | |
3292 // ------------- | |
3293 // make sure all code is generated | |
3294 masm->flush(); | |
3295 | |
3296 // return the blob | |
3297 // frame_size_words or bytes?? | |
3298 return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_words, oop_maps, true); | |
3299 } |