Mercurial > hg > truffle
annotate src/cpu/x86/vm/sharedRuntime_x86_32.cpp @ 1299:9eba43136cb5
6934494: JSR 292 MethodHandles adapters should be generated into their own CodeBlob
Summary: Passing a null pointer to an InvokeDynamic function call should lead to a NullPointerException.
Reviewed-by: kvn, never
author | twisti |
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date | Tue, 16 Mar 2010 11:52:17 +0100 |
parents | cf0685d550f1 |
children | 2338d41fbd81 |
rev | line source |
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0 | 1 /* |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
926
diff
changeset
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2 * Copyright 2003-2010 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_sharedRuntime_x86_32.cpp.incl" | |
27 | |
28 #define __ masm-> | |
29 #ifdef COMPILER2 | |
30 UncommonTrapBlob *SharedRuntime::_uncommon_trap_blob; | |
31 #endif // COMPILER2 | |
32 | |
33 DeoptimizationBlob *SharedRuntime::_deopt_blob; | |
34 SafepointBlob *SharedRuntime::_polling_page_safepoint_handler_blob; | |
35 SafepointBlob *SharedRuntime::_polling_page_return_handler_blob; | |
36 RuntimeStub* SharedRuntime::_wrong_method_blob; | |
37 RuntimeStub* SharedRuntime::_ic_miss_blob; | |
38 RuntimeStub* SharedRuntime::_resolve_opt_virtual_call_blob; | |
39 RuntimeStub* SharedRuntime::_resolve_virtual_call_blob; | |
40 RuntimeStub* SharedRuntime::_resolve_static_call_blob; | |
41 | |
524
c9004fe53695
6792301: StackAlignmentInBytes not honored for compiled native methods
xlu
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42 const int StackAlignmentInSlots = StackAlignmentInBytes / VMRegImpl::stack_slot_size; |
c9004fe53695
6792301: StackAlignmentInBytes not honored for compiled native methods
xlu
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changeset
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43 |
0 | 44 class RegisterSaver { |
45 enum { FPU_regs_live = 8 /*for the FPU stack*/+8/*eight more for XMM registers*/ }; | |
46 // Capture info about frame layout | |
47 enum layout { | |
48 fpu_state_off = 0, | |
49 fpu_state_end = fpu_state_off+FPUStateSizeInWords-1, | |
50 st0_off, st0H_off, | |
51 st1_off, st1H_off, | |
52 st2_off, st2H_off, | |
53 st3_off, st3H_off, | |
54 st4_off, st4H_off, | |
55 st5_off, st5H_off, | |
56 st6_off, st6H_off, | |
57 st7_off, st7H_off, | |
58 | |
59 xmm0_off, xmm0H_off, | |
60 xmm1_off, xmm1H_off, | |
61 xmm2_off, xmm2H_off, | |
62 xmm3_off, xmm3H_off, | |
63 xmm4_off, xmm4H_off, | |
64 xmm5_off, xmm5H_off, | |
65 xmm6_off, xmm6H_off, | |
66 xmm7_off, xmm7H_off, | |
67 flags_off, | |
68 rdi_off, | |
69 rsi_off, | |
70 ignore_off, // extra copy of rbp, | |
71 rsp_off, | |
72 rbx_off, | |
73 rdx_off, | |
74 rcx_off, | |
75 rax_off, | |
76 // The frame sender code expects that rbp will be in the "natural" place and | |
77 // will override any oopMap setting for it. We must therefore force the layout | |
78 // so that it agrees with the frame sender code. | |
79 rbp_off, | |
80 return_off, // slot for return address | |
81 reg_save_size }; | |
82 | |
83 | |
84 public: | |
85 | |
86 static OopMap* save_live_registers(MacroAssembler* masm, int additional_frame_words, | |
87 int* total_frame_words, bool verify_fpu = true); | |
88 static void restore_live_registers(MacroAssembler* masm); | |
89 | |
90 static int rax_offset() { return rax_off; } | |
91 static int rbx_offset() { return rbx_off; } | |
92 | |
93 // Offsets into the register save area | |
94 // Used by deoptimization when it is managing result register | |
95 // values on its own | |
96 | |
97 static int raxOffset(void) { return rax_off; } | |
98 static int rdxOffset(void) { return rdx_off; } | |
99 static int rbxOffset(void) { return rbx_off; } | |
100 static int xmm0Offset(void) { return xmm0_off; } | |
101 // This really returns a slot in the fp save area, which one is not important | |
102 static int fpResultOffset(void) { return st0_off; } | |
103 | |
104 // During deoptimization only the result register need to be restored | |
105 // all the other values have already been extracted. | |
106 | |
107 static void restore_result_registers(MacroAssembler* masm); | |
108 | |
109 }; | |
110 | |
111 OopMap* RegisterSaver::save_live_registers(MacroAssembler* masm, int additional_frame_words, | |
112 int* total_frame_words, bool verify_fpu) { | |
113 | |
114 int frame_size_in_bytes = (reg_save_size + additional_frame_words) * wordSize; | |
115 int frame_words = frame_size_in_bytes / wordSize; | |
116 *total_frame_words = frame_words; | |
117 | |
118 assert(FPUStateSizeInWords == 27, "update stack layout"); | |
119 | |
120 // save registers, fpu state, and flags | |
121 // We assume caller has already has return address slot on the stack | |
122 // We push epb twice in this sequence because we want the real rbp, | |
304 | 123 // to be under the return like a normal enter and we want to use pusha |
0 | 124 // We push by hand instead of pusing push |
125 __ enter(); | |
304 | 126 __ pusha(); |
127 __ pushf(); | |
128 __ subptr(rsp,FPU_regs_live*sizeof(jdouble)); // Push FPU registers space | |
0 | 129 __ push_FPU_state(); // Save FPU state & init |
130 | |
131 if (verify_fpu) { | |
132 // Some stubs may have non standard FPU control word settings so | |
133 // only check and reset the value when it required to be the | |
134 // standard value. The safepoint blob in particular can be used | |
135 // in methods which are using the 24 bit control word for | |
136 // optimized float math. | |
137 | |
138 #ifdef ASSERT | |
139 // Make sure the control word has the expected value | |
140 Label ok; | |
141 __ cmpw(Address(rsp, 0), StubRoutines::fpu_cntrl_wrd_std()); | |
142 __ jccb(Assembler::equal, ok); | |
143 __ stop("corrupted control word detected"); | |
144 __ bind(ok); | |
145 #endif | |
146 | |
147 // Reset the control word to guard against exceptions being unmasked | |
148 // since fstp_d can cause FPU stack underflow exceptions. Write it | |
149 // into the on stack copy and then reload that to make sure that the | |
150 // current and future values are correct. | |
151 __ movw(Address(rsp, 0), StubRoutines::fpu_cntrl_wrd_std()); | |
152 } | |
153 | |
154 __ frstor(Address(rsp, 0)); | |
155 if (!verify_fpu) { | |
156 // Set the control word so that exceptions are masked for the | |
157 // following code. | |
158 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); | |
159 } | |
160 | |
161 // Save the FPU registers in de-opt-able form | |
162 | |
163 __ fstp_d(Address(rsp, st0_off*wordSize)); // st(0) | |
164 __ fstp_d(Address(rsp, st1_off*wordSize)); // st(1) | |
165 __ fstp_d(Address(rsp, st2_off*wordSize)); // st(2) | |
166 __ fstp_d(Address(rsp, st3_off*wordSize)); // st(3) | |
167 __ fstp_d(Address(rsp, st4_off*wordSize)); // st(4) | |
168 __ fstp_d(Address(rsp, st5_off*wordSize)); // st(5) | |
169 __ fstp_d(Address(rsp, st6_off*wordSize)); // st(6) | |
170 __ fstp_d(Address(rsp, st7_off*wordSize)); // st(7) | |
171 | |
172 if( UseSSE == 1 ) { // Save the XMM state | |
173 __ movflt(Address(rsp,xmm0_off*wordSize),xmm0); | |
174 __ movflt(Address(rsp,xmm1_off*wordSize),xmm1); | |
175 __ movflt(Address(rsp,xmm2_off*wordSize),xmm2); | |
176 __ movflt(Address(rsp,xmm3_off*wordSize),xmm3); | |
177 __ movflt(Address(rsp,xmm4_off*wordSize),xmm4); | |
178 __ movflt(Address(rsp,xmm5_off*wordSize),xmm5); | |
179 __ movflt(Address(rsp,xmm6_off*wordSize),xmm6); | |
180 __ movflt(Address(rsp,xmm7_off*wordSize),xmm7); | |
181 } else if( UseSSE >= 2 ) { | |
182 __ movdbl(Address(rsp,xmm0_off*wordSize),xmm0); | |
183 __ movdbl(Address(rsp,xmm1_off*wordSize),xmm1); | |
184 __ movdbl(Address(rsp,xmm2_off*wordSize),xmm2); | |
185 __ movdbl(Address(rsp,xmm3_off*wordSize),xmm3); | |
186 __ movdbl(Address(rsp,xmm4_off*wordSize),xmm4); | |
187 __ movdbl(Address(rsp,xmm5_off*wordSize),xmm5); | |
188 __ movdbl(Address(rsp,xmm6_off*wordSize),xmm6); | |
189 __ movdbl(Address(rsp,xmm7_off*wordSize),xmm7); | |
190 } | |
191 | |
192 // Set an oopmap for the call site. This oopmap will map all | |
193 // oop-registers and debug-info registers as callee-saved. This | |
194 // will allow deoptimization at this safepoint to find all possible | |
195 // debug-info recordings, as well as let GC find all oops. | |
196 | |
197 OopMapSet *oop_maps = new OopMapSet(); | |
198 OopMap* map = new OopMap( frame_words, 0 ); | |
199 | |
200 #define STACK_OFFSET(x) VMRegImpl::stack2reg((x) + additional_frame_words) | |
201 | |
202 map->set_callee_saved(STACK_OFFSET( rax_off), rax->as_VMReg()); | |
203 map->set_callee_saved(STACK_OFFSET( rcx_off), rcx->as_VMReg()); | |
204 map->set_callee_saved(STACK_OFFSET( rdx_off), rdx->as_VMReg()); | |
205 map->set_callee_saved(STACK_OFFSET( rbx_off), rbx->as_VMReg()); | |
206 // rbp, location is known implicitly, no oopMap | |
207 map->set_callee_saved(STACK_OFFSET( rsi_off), rsi->as_VMReg()); | |
208 map->set_callee_saved(STACK_OFFSET( rdi_off), rdi->as_VMReg()); | |
209 map->set_callee_saved(STACK_OFFSET(st0_off), as_FloatRegister(0)->as_VMReg()); | |
210 map->set_callee_saved(STACK_OFFSET(st1_off), as_FloatRegister(1)->as_VMReg()); | |
211 map->set_callee_saved(STACK_OFFSET(st2_off), as_FloatRegister(2)->as_VMReg()); | |
212 map->set_callee_saved(STACK_OFFSET(st3_off), as_FloatRegister(3)->as_VMReg()); | |
213 map->set_callee_saved(STACK_OFFSET(st4_off), as_FloatRegister(4)->as_VMReg()); | |
214 map->set_callee_saved(STACK_OFFSET(st5_off), as_FloatRegister(5)->as_VMReg()); | |
215 map->set_callee_saved(STACK_OFFSET(st6_off), as_FloatRegister(6)->as_VMReg()); | |
216 map->set_callee_saved(STACK_OFFSET(st7_off), as_FloatRegister(7)->as_VMReg()); | |
217 map->set_callee_saved(STACK_OFFSET(xmm0_off), xmm0->as_VMReg()); | |
218 map->set_callee_saved(STACK_OFFSET(xmm1_off), xmm1->as_VMReg()); | |
219 map->set_callee_saved(STACK_OFFSET(xmm2_off), xmm2->as_VMReg()); | |
220 map->set_callee_saved(STACK_OFFSET(xmm3_off), xmm3->as_VMReg()); | |
221 map->set_callee_saved(STACK_OFFSET(xmm4_off), xmm4->as_VMReg()); | |
222 map->set_callee_saved(STACK_OFFSET(xmm5_off), xmm5->as_VMReg()); | |
223 map->set_callee_saved(STACK_OFFSET(xmm6_off), xmm6->as_VMReg()); | |
224 map->set_callee_saved(STACK_OFFSET(xmm7_off), xmm7->as_VMReg()); | |
225 // %%% This is really a waste but we'll keep things as they were for now | |
226 if (true) { | |
227 #define NEXTREG(x) (x)->as_VMReg()->next() | |
228 map->set_callee_saved(STACK_OFFSET(st0H_off), NEXTREG(as_FloatRegister(0))); | |
229 map->set_callee_saved(STACK_OFFSET(st1H_off), NEXTREG(as_FloatRegister(1))); | |
230 map->set_callee_saved(STACK_OFFSET(st2H_off), NEXTREG(as_FloatRegister(2))); | |
231 map->set_callee_saved(STACK_OFFSET(st3H_off), NEXTREG(as_FloatRegister(3))); | |
232 map->set_callee_saved(STACK_OFFSET(st4H_off), NEXTREG(as_FloatRegister(4))); | |
233 map->set_callee_saved(STACK_OFFSET(st5H_off), NEXTREG(as_FloatRegister(5))); | |
234 map->set_callee_saved(STACK_OFFSET(st6H_off), NEXTREG(as_FloatRegister(6))); | |
235 map->set_callee_saved(STACK_OFFSET(st7H_off), NEXTREG(as_FloatRegister(7))); | |
236 map->set_callee_saved(STACK_OFFSET(xmm0H_off), NEXTREG(xmm0)); | |
237 map->set_callee_saved(STACK_OFFSET(xmm1H_off), NEXTREG(xmm1)); | |
238 map->set_callee_saved(STACK_OFFSET(xmm2H_off), NEXTREG(xmm2)); | |
239 map->set_callee_saved(STACK_OFFSET(xmm3H_off), NEXTREG(xmm3)); | |
240 map->set_callee_saved(STACK_OFFSET(xmm4H_off), NEXTREG(xmm4)); | |
241 map->set_callee_saved(STACK_OFFSET(xmm5H_off), NEXTREG(xmm5)); | |
242 map->set_callee_saved(STACK_OFFSET(xmm6H_off), NEXTREG(xmm6)); | |
243 map->set_callee_saved(STACK_OFFSET(xmm7H_off), NEXTREG(xmm7)); | |
244 #undef NEXTREG | |
245 #undef STACK_OFFSET | |
246 } | |
247 | |
248 return map; | |
249 | |
250 } | |
251 | |
252 void RegisterSaver::restore_live_registers(MacroAssembler* masm) { | |
253 | |
254 // Recover XMM & FPU state | |
255 if( UseSSE == 1 ) { | |
256 __ movflt(xmm0,Address(rsp,xmm0_off*wordSize)); | |
257 __ movflt(xmm1,Address(rsp,xmm1_off*wordSize)); | |
258 __ movflt(xmm2,Address(rsp,xmm2_off*wordSize)); | |
259 __ movflt(xmm3,Address(rsp,xmm3_off*wordSize)); | |
260 __ movflt(xmm4,Address(rsp,xmm4_off*wordSize)); | |
261 __ movflt(xmm5,Address(rsp,xmm5_off*wordSize)); | |
262 __ movflt(xmm6,Address(rsp,xmm6_off*wordSize)); | |
263 __ movflt(xmm7,Address(rsp,xmm7_off*wordSize)); | |
264 } else if( UseSSE >= 2 ) { | |
265 __ movdbl(xmm0,Address(rsp,xmm0_off*wordSize)); | |
266 __ movdbl(xmm1,Address(rsp,xmm1_off*wordSize)); | |
267 __ movdbl(xmm2,Address(rsp,xmm2_off*wordSize)); | |
268 __ movdbl(xmm3,Address(rsp,xmm3_off*wordSize)); | |
269 __ movdbl(xmm4,Address(rsp,xmm4_off*wordSize)); | |
270 __ movdbl(xmm5,Address(rsp,xmm5_off*wordSize)); | |
271 __ movdbl(xmm6,Address(rsp,xmm6_off*wordSize)); | |
272 __ movdbl(xmm7,Address(rsp,xmm7_off*wordSize)); | |
273 } | |
274 __ pop_FPU_state(); | |
304 | 275 __ addptr(rsp, FPU_regs_live*sizeof(jdouble)); // Pop FPU registers |
276 | |
277 __ popf(); | |
278 __ popa(); | |
0 | 279 // Get the rbp, described implicitly by the frame sender code (no oopMap) |
304 | 280 __ pop(rbp); |
0 | 281 |
282 } | |
283 | |
284 void RegisterSaver::restore_result_registers(MacroAssembler* masm) { | |
285 | |
286 // Just restore result register. Only used by deoptimization. By | |
287 // now any callee save register that needs to be restore to a c2 | |
288 // caller of the deoptee has been extracted into the vframeArray | |
289 // and will be stuffed into the c2i adapter we create for later | |
290 // restoration so only result registers need to be restored here. | |
291 // | |
292 | |
293 __ frstor(Address(rsp, 0)); // Restore fpu state | |
294 | |
295 // Recover XMM & FPU state | |
296 if( UseSSE == 1 ) { | |
297 __ movflt(xmm0, Address(rsp, xmm0_off*wordSize)); | |
298 } else if( UseSSE >= 2 ) { | |
299 __ movdbl(xmm0, Address(rsp, xmm0_off*wordSize)); | |
300 } | |
304 | 301 __ movptr(rax, Address(rsp, rax_off*wordSize)); |
302 __ movptr(rdx, Address(rsp, rdx_off*wordSize)); | |
0 | 303 // Pop all of the register save are off the stack except the return address |
304 | 304 __ addptr(rsp, return_off * wordSize); |
0 | 305 } |
306 | |
307 // The java_calling_convention describes stack locations as ideal slots on | |
308 // a frame with no abi restrictions. Since we must observe abi restrictions | |
309 // (like the placement of the register window) the slots must be biased by | |
310 // the following value. | |
311 static int reg2offset_in(VMReg r) { | |
312 // Account for saved rbp, and return address | |
313 // This should really be in_preserve_stack_slots | |
314 return (r->reg2stack() + 2) * VMRegImpl::stack_slot_size; | |
315 } | |
316 | |
317 static int reg2offset_out(VMReg r) { | |
318 return (r->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size; | |
319 } | |
320 | |
321 // --------------------------------------------------------------------------- | |
322 // Read the array of BasicTypes from a signature, and compute where the | |
323 // arguments should go. Values in the VMRegPair regs array refer to 4-byte | |
324 // quantities. Values less than SharedInfo::stack0 are registers, those above | |
325 // refer to 4-byte stack slots. All stack slots are based off of the stack pointer | |
326 // as framesizes are fixed. | |
327 // VMRegImpl::stack0 refers to the first slot 0(sp). | |
328 // and VMRegImpl::stack0+1 refers to the memory word 4-byes higher. Register | |
329 // up to RegisterImpl::number_of_registers) are the 32-bit | |
330 // integer registers. | |
331 | |
332 // Pass first two oop/int args in registers ECX and EDX. | |
333 // Pass first two float/double args in registers XMM0 and XMM1. | |
334 // Doubles have precedence, so if you pass a mix of floats and doubles | |
335 // the doubles will grab the registers before the floats will. | |
336 | |
337 // Note: the INPUTS in sig_bt are in units of Java argument words, which are | |
338 // either 32-bit or 64-bit depending on the build. The OUTPUTS are in 32-bit | |
339 // units regardless of build. Of course for i486 there is no 64 bit build | |
340 | |
341 | |
342 // --------------------------------------------------------------------------- | |
343 // The compiled Java calling convention. | |
344 // Pass first two oop/int args in registers ECX and EDX. | |
345 // Pass first two float/double args in registers XMM0 and XMM1. | |
346 // Doubles have precedence, so if you pass a mix of floats and doubles | |
347 // the doubles will grab the registers before the floats will. | |
348 int SharedRuntime::java_calling_convention(const BasicType *sig_bt, | |
349 VMRegPair *regs, | |
350 int total_args_passed, | |
351 int is_outgoing) { | |
352 uint stack = 0; // Starting stack position for args on stack | |
353 | |
354 | |
355 // Pass first two oop/int args in registers ECX and EDX. | |
356 uint reg_arg0 = 9999; | |
357 uint reg_arg1 = 9999; | |
358 | |
359 // Pass first two float/double args in registers XMM0 and XMM1. | |
360 // Doubles have precedence, so if you pass a mix of floats and doubles | |
361 // the doubles will grab the registers before the floats will. | |
362 // CNC - TURNED OFF FOR non-SSE. | |
363 // On Intel we have to round all doubles (and most floats) at | |
364 // call sites by storing to the stack in any case. | |
365 // UseSSE=0 ==> Don't Use ==> 9999+0 | |
366 // UseSSE=1 ==> Floats only ==> 9999+1 | |
367 // UseSSE>=2 ==> Floats or doubles ==> 9999+2 | |
368 enum { fltarg_dontuse = 9999+0, fltarg_float_only = 9999+1, fltarg_flt_dbl = 9999+2 }; | |
369 uint fargs = (UseSSE>=2) ? 2 : UseSSE; | |
370 uint freg_arg0 = 9999+fargs; | |
371 uint freg_arg1 = 9999+fargs; | |
372 | |
373 // Pass doubles & longs aligned on the stack. First count stack slots for doubles | |
374 int i; | |
375 for( i = 0; i < total_args_passed; i++) { | |
376 if( sig_bt[i] == T_DOUBLE ) { | |
377 // first 2 doubles go in registers | |
378 if( freg_arg0 == fltarg_flt_dbl ) freg_arg0 = i; | |
379 else if( freg_arg1 == fltarg_flt_dbl ) freg_arg1 = i; | |
380 else // Else double is passed low on the stack to be aligned. | |
381 stack += 2; | |
382 } else if( sig_bt[i] == T_LONG ) { | |
383 stack += 2; | |
384 } | |
385 } | |
386 int dstack = 0; // Separate counter for placing doubles | |
387 | |
388 // Now pick where all else goes. | |
389 for( i = 0; i < total_args_passed; i++) { | |
390 // From the type and the argument number (count) compute the location | |
391 switch( sig_bt[i] ) { | |
392 case T_SHORT: | |
393 case T_CHAR: | |
394 case T_BYTE: | |
395 case T_BOOLEAN: | |
396 case T_INT: | |
397 case T_ARRAY: | |
398 case T_OBJECT: | |
399 case T_ADDRESS: | |
400 if( reg_arg0 == 9999 ) { | |
401 reg_arg0 = i; | |
402 regs[i].set1(rcx->as_VMReg()); | |
403 } else if( reg_arg1 == 9999 ) { | |
404 reg_arg1 = i; | |
405 regs[i].set1(rdx->as_VMReg()); | |
406 } else { | |
407 regs[i].set1(VMRegImpl::stack2reg(stack++)); | |
408 } | |
409 break; | |
410 case T_FLOAT: | |
411 if( freg_arg0 == fltarg_flt_dbl || freg_arg0 == fltarg_float_only ) { | |
412 freg_arg0 = i; | |
413 regs[i].set1(xmm0->as_VMReg()); | |
414 } else if( freg_arg1 == fltarg_flt_dbl || freg_arg1 == fltarg_float_only ) { | |
415 freg_arg1 = i; | |
416 regs[i].set1(xmm1->as_VMReg()); | |
417 } else { | |
418 regs[i].set1(VMRegImpl::stack2reg(stack++)); | |
419 } | |
420 break; | |
421 case T_LONG: | |
422 assert(sig_bt[i+1] == T_VOID, "missing Half" ); | |
423 regs[i].set2(VMRegImpl::stack2reg(dstack)); | |
424 dstack += 2; | |
425 break; | |
426 case T_DOUBLE: | |
427 assert(sig_bt[i+1] == T_VOID, "missing Half" ); | |
428 if( freg_arg0 == (uint)i ) { | |
429 regs[i].set2(xmm0->as_VMReg()); | |
430 } else if( freg_arg1 == (uint)i ) { | |
431 regs[i].set2(xmm1->as_VMReg()); | |
432 } else { | |
433 regs[i].set2(VMRegImpl::stack2reg(dstack)); | |
434 dstack += 2; | |
435 } | |
436 break; | |
437 case T_VOID: regs[i].set_bad(); break; | |
438 break; | |
439 default: | |
440 ShouldNotReachHere(); | |
441 break; | |
442 } | |
443 } | |
444 | |
445 // return value can be odd number of VMRegImpl stack slots make multiple of 2 | |
446 return round_to(stack, 2); | |
447 } | |
448 | |
449 // Patch the callers callsite with entry to compiled code if it exists. | |
450 static void patch_callers_callsite(MacroAssembler *masm) { | |
451 Label L; | |
452 __ verify_oop(rbx); | |
304 | 453 __ cmpptr(Address(rbx, in_bytes(methodOopDesc::code_offset())), (int32_t)NULL_WORD); |
0 | 454 __ jcc(Assembler::equal, L); |
455 // Schedule the branch target address early. | |
456 // Call into the VM to patch the caller, then jump to compiled callee | |
457 // rax, isn't live so capture return address while we easily can | |
304 | 458 __ movptr(rax, Address(rsp, 0)); |
459 __ pusha(); | |
460 __ pushf(); | |
0 | 461 |
462 if (UseSSE == 1) { | |
304 | 463 __ subptr(rsp, 2*wordSize); |
0 | 464 __ movflt(Address(rsp, 0), xmm0); |
465 __ movflt(Address(rsp, wordSize), xmm1); | |
466 } | |
467 if (UseSSE >= 2) { | |
304 | 468 __ subptr(rsp, 4*wordSize); |
0 | 469 __ movdbl(Address(rsp, 0), xmm0); |
470 __ movdbl(Address(rsp, 2*wordSize), xmm1); | |
471 } | |
472 #ifdef COMPILER2 | |
473 // C2 may leave the stack dirty if not in SSE2+ mode | |
474 if (UseSSE >= 2) { | |
475 __ verify_FPU(0, "c2i transition should have clean FPU stack"); | |
476 } else { | |
477 __ empty_FPU_stack(); | |
478 } | |
479 #endif /* COMPILER2 */ | |
480 | |
481 // VM needs caller's callsite | |
304 | 482 __ push(rax); |
0 | 483 // VM needs target method |
304 | 484 __ push(rbx); |
0 | 485 __ verify_oop(rbx); |
486 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite))); | |
304 | 487 __ addptr(rsp, 2*wordSize); |
0 | 488 |
489 if (UseSSE == 1) { | |
490 __ movflt(xmm0, Address(rsp, 0)); | |
491 __ movflt(xmm1, Address(rsp, wordSize)); | |
304 | 492 __ addptr(rsp, 2*wordSize); |
0 | 493 } |
494 if (UseSSE >= 2) { | |
495 __ movdbl(xmm0, Address(rsp, 0)); | |
496 __ movdbl(xmm1, Address(rsp, 2*wordSize)); | |
304 | 497 __ addptr(rsp, 4*wordSize); |
0 | 498 } |
499 | |
304 | 500 __ popf(); |
501 __ popa(); | |
0 | 502 __ bind(L); |
503 } | |
504 | |
505 | |
506 // Helper function to put tags in interpreter stack. | |
507 static void tag_stack(MacroAssembler *masm, const BasicType sig, int st_off) { | |
508 if (TaggedStackInterpreter) { | |
509 int tag_offset = st_off + Interpreter::expr_tag_offset_in_bytes(0); | |
510 if (sig == T_OBJECT || sig == T_ARRAY) { | |
304 | 511 __ movptr(Address(rsp, tag_offset), frame::TagReference); |
0 | 512 } else if (sig == T_LONG || sig == T_DOUBLE) { |
513 int next_tag_offset = st_off + Interpreter::expr_tag_offset_in_bytes(1); | |
304 | 514 __ movptr(Address(rsp, next_tag_offset), frame::TagValue); |
515 __ movptr(Address(rsp, tag_offset), frame::TagValue); | |
0 | 516 } else { |
304 | 517 __ movptr(Address(rsp, tag_offset), frame::TagValue); |
0 | 518 } |
519 } | |
520 } | |
521 | |
522 // Double and long values with Tagged stacks are not contiguous. | |
523 static void move_c2i_double(MacroAssembler *masm, XMMRegister r, int st_off) { | |
524 int next_off = st_off - Interpreter::stackElementSize(); | |
525 if (TaggedStackInterpreter) { | |
526 __ movdbl(Address(rsp, next_off), r); | |
527 // Move top half up and put tag in the middle. | |
528 __ movl(rdi, Address(rsp, next_off+wordSize)); | |
529 __ movl(Address(rsp, st_off), rdi); | |
530 tag_stack(masm, T_DOUBLE, next_off); | |
531 } else { | |
532 __ movdbl(Address(rsp, next_off), r); | |
533 } | |
534 } | |
535 | |
536 static void gen_c2i_adapter(MacroAssembler *masm, | |
537 int total_args_passed, | |
538 int comp_args_on_stack, | |
539 const BasicType *sig_bt, | |
540 const VMRegPair *regs, | |
541 Label& skip_fixup) { | |
542 // Before we get into the guts of the C2I adapter, see if we should be here | |
543 // at all. We've come from compiled code and are attempting to jump to the | |
544 // interpreter, which means the caller made a static call to get here | |
545 // (vcalls always get a compiled target if there is one). Check for a | |
546 // compiled target. If there is one, we need to patch the caller's call. | |
547 patch_callers_callsite(masm); | |
548 | |
549 __ bind(skip_fixup); | |
550 | |
551 #ifdef COMPILER2 | |
552 // C2 may leave the stack dirty if not in SSE2+ mode | |
553 if (UseSSE >= 2) { | |
554 __ verify_FPU(0, "c2i transition should have clean FPU stack"); | |
555 } else { | |
556 __ empty_FPU_stack(); | |
557 } | |
558 #endif /* COMPILER2 */ | |
559 | |
560 // Since all args are passed on the stack, total_args_passed * interpreter_ | |
561 // stack_element_size is the | |
562 // space we need. | |
563 int extraspace = total_args_passed * Interpreter::stackElementSize(); | |
564 | |
565 // Get return address | |
304 | 566 __ pop(rax); |
0 | 567 |
568 // set senderSP value | |
304 | 569 __ movptr(rsi, rsp); |
570 | |
571 __ subptr(rsp, extraspace); | |
0 | 572 |
573 // Now write the args into the outgoing interpreter space | |
574 for (int i = 0; i < total_args_passed; i++) { | |
575 if (sig_bt[i] == T_VOID) { | |
576 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
577 continue; | |
578 } | |
579 | |
580 // st_off points to lowest address on stack. | |
581 int st_off = ((total_args_passed - 1) - i) * Interpreter::stackElementSize(); | |
304 | 582 int next_off = st_off - Interpreter::stackElementSize(); |
583 | |
0 | 584 // Say 4 args: |
585 // i st_off | |
586 // 0 12 T_LONG | |
587 // 1 8 T_VOID | |
588 // 2 4 T_OBJECT | |
589 // 3 0 T_BOOL | |
590 VMReg r_1 = regs[i].first(); | |
591 VMReg r_2 = regs[i].second(); | |
592 if (!r_1->is_valid()) { | |
593 assert(!r_2->is_valid(), ""); | |
594 continue; | |
595 } | |
596 | |
597 if (r_1->is_stack()) { | |
598 // memory to memory use fpu stack top | |
599 int ld_off = r_1->reg2stack() * VMRegImpl::stack_slot_size + extraspace; | |
600 | |
601 if (!r_2->is_valid()) { | |
602 __ movl(rdi, Address(rsp, ld_off)); | |
304 | 603 __ movptr(Address(rsp, st_off), rdi); |
0 | 604 tag_stack(masm, sig_bt[i], st_off); |
605 } else { | |
606 | |
607 // ld_off == LSW, ld_off+VMRegImpl::stack_slot_size == MSW | |
608 // st_off == MSW, st_off-wordSize == LSW | |
609 | |
304 | 610 __ movptr(rdi, Address(rsp, ld_off)); |
611 __ movptr(Address(rsp, next_off), rdi); | |
612 #ifndef _LP64 | |
613 __ movptr(rdi, Address(rsp, ld_off + wordSize)); | |
614 __ movptr(Address(rsp, st_off), rdi); | |
615 #else | |
616 #ifdef ASSERT | |
617 // Overwrite the unused slot with known junk | |
618 __ mov64(rax, CONST64(0xdeadffffdeadaaaa)); | |
619 __ movptr(Address(rsp, st_off), rax); | |
620 #endif /* ASSERT */ | |
621 #endif // _LP64 | |
0 | 622 tag_stack(masm, sig_bt[i], next_off); |
623 } | |
624 } else if (r_1->is_Register()) { | |
625 Register r = r_1->as_Register(); | |
626 if (!r_2->is_valid()) { | |
627 __ movl(Address(rsp, st_off), r); | |
628 tag_stack(masm, sig_bt[i], st_off); | |
629 } else { | |
630 // long/double in gpr | |
304 | 631 NOT_LP64(ShouldNotReachHere()); |
632 // Two VMRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG | |
633 // T_DOUBLE and T_LONG use two slots in the interpreter | |
634 if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
635 // long/double in gpr | |
636 #ifdef ASSERT | |
637 // Overwrite the unused slot with known junk | |
638 LP64_ONLY(__ mov64(rax, CONST64(0xdeadffffdeadaaab))); | |
639 __ movptr(Address(rsp, st_off), rax); | |
640 #endif /* ASSERT */ | |
641 __ movptr(Address(rsp, next_off), r); | |
642 tag_stack(masm, sig_bt[i], next_off); | |
643 } else { | |
644 __ movptr(Address(rsp, st_off), r); | |
645 tag_stack(masm, sig_bt[i], st_off); | |
646 } | |
0 | 647 } |
648 } else { | |
649 assert(r_1->is_XMMRegister(), ""); | |
650 if (!r_2->is_valid()) { | |
651 __ movflt(Address(rsp, st_off), r_1->as_XMMRegister()); | |
652 tag_stack(masm, sig_bt[i], st_off); | |
653 } else { | |
654 assert(sig_bt[i] == T_DOUBLE || sig_bt[i] == T_LONG, "wrong type"); | |
655 move_c2i_double(masm, r_1->as_XMMRegister(), st_off); | |
656 } | |
657 } | |
658 } | |
659 | |
660 // Schedule the branch target address early. | |
304 | 661 __ movptr(rcx, Address(rbx, in_bytes(methodOopDesc::interpreter_entry_offset()))); |
0 | 662 // And repush original return address |
304 | 663 __ push(rax); |
0 | 664 __ jmp(rcx); |
665 } | |
666 | |
667 | |
668 // For tagged stacks, double or long value aren't contiguous on the stack | |
669 // so get them contiguous for the xmm load | |
670 static void move_i2c_double(MacroAssembler *masm, XMMRegister r, Register saved_sp, int ld_off) { | |
671 int next_val_off = ld_off - Interpreter::stackElementSize(); | |
672 if (TaggedStackInterpreter) { | |
673 // use tag slot temporarily for MSW | |
304 | 674 __ movptr(rsi, Address(saved_sp, ld_off)); |
675 __ movptr(Address(saved_sp, next_val_off+wordSize), rsi); | |
0 | 676 __ movdbl(r, Address(saved_sp, next_val_off)); |
677 // restore tag | |
304 | 678 __ movptr(Address(saved_sp, next_val_off+wordSize), frame::TagValue); |
0 | 679 } else { |
680 __ movdbl(r, Address(saved_sp, next_val_off)); | |
681 } | |
682 } | |
683 | |
684 static void gen_i2c_adapter(MacroAssembler *masm, | |
685 int total_args_passed, | |
686 int comp_args_on_stack, | |
687 const BasicType *sig_bt, | |
688 const VMRegPair *regs) { | |
689 // we're being called from the interpreter but need to find the | |
690 // compiled return entry point. The return address on the stack | |
691 // should point at it and we just need to pull the old value out. | |
692 // load up the pointer to the compiled return entry point and | |
693 // rewrite our return pc. The code is arranged like so: | |
694 // | |
695 // .word Interpreter::return_sentinel | |
696 // .word address_of_compiled_return_point | |
697 // return_entry_point: blah_blah_blah | |
698 // | |
699 // So we can find the appropriate return point by loading up the word | |
700 // just prior to the current return address we have on the stack. | |
701 // | |
702 // We will only enter here from an interpreted frame and never from after | |
703 // passing thru a c2i. Azul allowed this but we do not. If we lose the | |
704 // race and use a c2i we will remain interpreted for the race loser(s). | |
705 // This removes all sorts of headaches on the x86 side and also eliminates | |
706 // the possibility of having c2i -> i2c -> c2i -> ... endless transitions. | |
707 | |
708 | |
709 // Note: rsi contains the senderSP on entry. We must preserve it since | |
710 // we may do a i2c -> c2i transition if we lose a race where compiled | |
711 // code goes non-entrant while we get args ready. | |
712 | |
713 // Pick up the return address | |
304 | 714 __ movptr(rax, Address(rsp, 0)); |
0 | 715 |
716 // If UseSSE >= 2 then no cleanup is needed on the return to the | |
717 // interpreter so skip fixing up the return entry point unless | |
718 // VerifyFPU is enabled. | |
719 if (UseSSE < 2 || VerifyFPU) { | |
720 Label skip, chk_int; | |
721 // If we were called from the call stub we need to do a little bit different | |
722 // cleanup than if the interpreter returned to the call stub. | |
723 | |
724 ExternalAddress stub_return_address(StubRoutines::_call_stub_return_address); | |
304 | 725 __ cmpptr(rax, stub_return_address.addr()); |
0 | 726 __ jcc(Assembler::notEqual, chk_int); |
304 | 727 assert(StubRoutines::x86::get_call_stub_compiled_return() != NULL, "must be set"); |
728 __ lea(rax, ExternalAddress(StubRoutines::x86::get_call_stub_compiled_return())); | |
0 | 729 __ jmp(skip); |
730 | |
731 // It must be the interpreter since we never get here via a c2i (unlike Azul) | |
732 | |
733 __ bind(chk_int); | |
734 #ifdef ASSERT | |
735 { | |
736 Label ok; | |
304 | 737 __ cmpl(Address(rax, -2*wordSize), Interpreter::return_sentinel); |
0 | 738 __ jcc(Assembler::equal, ok); |
739 __ int3(); | |
740 __ bind(ok); | |
741 } | |
742 #endif // ASSERT | |
304 | 743 __ movptr(rax, Address(rax, -wordSize)); |
0 | 744 __ bind(skip); |
745 } | |
746 | |
747 // rax, now contains the compiled return entry point which will do an | |
748 // cleanup needed for the return from compiled to interpreted. | |
749 | |
750 // Must preserve original SP for loading incoming arguments because | |
751 // we need to align the outgoing SP for compiled code. | |
304 | 752 __ movptr(rdi, rsp); |
0 | 753 |
754 // Cut-out for having no stack args. Since up to 2 int/oop args are passed | |
755 // in registers, we will occasionally have no stack args. | |
756 int comp_words_on_stack = 0; | |
757 if (comp_args_on_stack) { | |
758 // Sig words on the stack are greater-than VMRegImpl::stack0. Those in | |
759 // registers are below. By subtracting stack0, we either get a negative | |
760 // number (all values in registers) or the maximum stack slot accessed. | |
761 // int comp_args_on_stack = VMRegImpl::reg2stack(max_arg); | |
762 // Convert 4-byte stack slots to words. | |
763 comp_words_on_stack = round_to(comp_args_on_stack*4, wordSize)>>LogBytesPerWord; | |
764 // Round up to miminum stack alignment, in wordSize | |
765 comp_words_on_stack = round_to(comp_words_on_stack, 2); | |
304 | 766 __ subptr(rsp, comp_words_on_stack * wordSize); |
0 | 767 } |
768 | |
769 // Align the outgoing SP | |
304 | 770 __ andptr(rsp, -(StackAlignmentInBytes)); |
0 | 771 |
772 // push the return address on the stack (note that pushing, rather | |
773 // than storing it, yields the correct frame alignment for the callee) | |
304 | 774 __ push(rax); |
0 | 775 |
776 // Put saved SP in another register | |
777 const Register saved_sp = rax; | |
304 | 778 __ movptr(saved_sp, rdi); |
0 | 779 |
780 | |
781 // Will jump to the compiled code just as if compiled code was doing it. | |
782 // Pre-load the register-jump target early, to schedule it better. | |
304 | 783 __ movptr(rdi, Address(rbx, in_bytes(methodOopDesc::from_compiled_offset()))); |
0 | 784 |
785 // Now generate the shuffle code. Pick up all register args and move the | |
786 // rest through the floating point stack top. | |
787 for (int i = 0; i < total_args_passed; i++) { | |
788 if (sig_bt[i] == T_VOID) { | |
789 // Longs and doubles are passed in native word order, but misaligned | |
790 // in the 32-bit build. | |
791 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
792 continue; | |
793 } | |
794 | |
795 // Pick up 0, 1 or 2 words from SP+offset. | |
796 | |
797 assert(!regs[i].second()->is_valid() || regs[i].first()->next() == regs[i].second(), | |
798 "scrambled load targets?"); | |
799 // Load in argument order going down. | |
800 int ld_off = (total_args_passed - i)*Interpreter::stackElementSize() + Interpreter::value_offset_in_bytes(); | |
801 // Point to interpreter value (vs. tag) | |
802 int next_off = ld_off - Interpreter::stackElementSize(); | |
803 // | |
804 // | |
805 // | |
806 VMReg r_1 = regs[i].first(); | |
807 VMReg r_2 = regs[i].second(); | |
808 if (!r_1->is_valid()) { | |
809 assert(!r_2->is_valid(), ""); | |
810 continue; | |
811 } | |
812 if (r_1->is_stack()) { | |
813 // Convert stack slot to an SP offset (+ wordSize to account for return address ) | |
814 int st_off = regs[i].first()->reg2stack()*VMRegImpl::stack_slot_size + wordSize; | |
815 | |
816 // We can use rsi as a temp here because compiled code doesn't need rsi as an input | |
817 // and if we end up going thru a c2i because of a miss a reasonable value of rsi | |
818 // we be generated. | |
819 if (!r_2->is_valid()) { | |
820 // __ fld_s(Address(saved_sp, ld_off)); | |
821 // __ fstp_s(Address(rsp, st_off)); | |
822 __ movl(rsi, Address(saved_sp, ld_off)); | |
304 | 823 __ movptr(Address(rsp, st_off), rsi); |
0 | 824 } else { |
825 // Interpreter local[n] == MSW, local[n+1] == LSW however locals | |
826 // are accessed as negative so LSW is at LOW address | |
827 | |
828 // ld_off is MSW so get LSW | |
829 // st_off is LSW (i.e. reg.first()) | |
830 // __ fld_d(Address(saved_sp, next_off)); | |
831 // __ fstp_d(Address(rsp, st_off)); | |
304 | 832 // |
833 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE | |
834 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case | |
835 // So we must adjust where to pick up the data to match the interpreter. | |
836 // | |
837 // Interpreter local[n] == MSW, local[n+1] == LSW however locals | |
838 // are accessed as negative so LSW is at LOW address | |
839 | |
840 // ld_off is MSW so get LSW | |
841 const int offset = (NOT_LP64(true ||) sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? | |
842 next_off : ld_off; | |
843 __ movptr(rsi, Address(saved_sp, offset)); | |
844 __ movptr(Address(rsp, st_off), rsi); | |
845 #ifndef _LP64 | |
846 __ movptr(rsi, Address(saved_sp, ld_off)); | |
847 __ movptr(Address(rsp, st_off + wordSize), rsi); | |
848 #endif // _LP64 | |
0 | 849 } |
850 } else if (r_1->is_Register()) { // Register argument | |
851 Register r = r_1->as_Register(); | |
852 assert(r != rax, "must be different"); | |
853 if (r_2->is_valid()) { | |
304 | 854 // |
855 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE | |
856 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case | |
857 // So we must adjust where to pick up the data to match the interpreter. | |
858 | |
859 const int offset = (NOT_LP64(true ||) sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? | |
860 next_off : ld_off; | |
861 | |
862 // this can be a misaligned move | |
863 __ movptr(r, Address(saved_sp, offset)); | |
864 #ifndef _LP64 | |
0 | 865 assert(r_2->as_Register() != rax, "need another temporary register"); |
866 // Remember r_1 is low address (and LSB on x86) | |
867 // So r_2 gets loaded from high address regardless of the platform | |
304 | 868 __ movptr(r_2->as_Register(), Address(saved_sp, ld_off)); |
869 #endif // _LP64 | |
0 | 870 } else { |
871 __ movl(r, Address(saved_sp, ld_off)); | |
872 } | |
873 } else { | |
874 assert(r_1->is_XMMRegister(), ""); | |
875 if (!r_2->is_valid()) { | |
876 __ movflt(r_1->as_XMMRegister(), Address(saved_sp, ld_off)); | |
877 } else { | |
878 move_i2c_double(masm, r_1->as_XMMRegister(), saved_sp, ld_off); | |
879 } | |
880 } | |
881 } | |
882 | |
883 // 6243940 We might end up in handle_wrong_method if | |
884 // the callee is deoptimized as we race thru here. If that | |
885 // happens we don't want to take a safepoint because the | |
886 // caller frame will look interpreted and arguments are now | |
887 // "compiled" so it is much better to make this transition | |
888 // invisible to the stack walking code. Unfortunately if | |
889 // we try and find the callee by normal means a safepoint | |
890 // is possible. So we stash the desired callee in the thread | |
891 // and the vm will find there should this case occur. | |
892 | |
893 __ get_thread(rax); | |
304 | 894 __ movptr(Address(rax, JavaThread::callee_target_offset()), rbx); |
0 | 895 |
896 // move methodOop to rax, in case we end up in an c2i adapter. | |
897 // the c2i adapters expect methodOop in rax, (c2) because c2's | |
898 // resolve stubs return the result (the method) in rax,. | |
899 // I'd love to fix this. | |
304 | 900 __ mov(rax, rbx); |
0 | 901 |
902 __ jmp(rdi); | |
903 } | |
904 | |
905 // --------------------------------------------------------------- | |
906 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm, | |
907 int total_args_passed, | |
908 int comp_args_on_stack, | |
909 const BasicType *sig_bt, | |
1187
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910 const VMRegPair *regs, |
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911 AdapterFingerPrint* fingerprint) { |
0 | 912 address i2c_entry = __ pc(); |
913 | |
914 gen_i2c_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs); | |
915 | |
916 // ------------------------------------------------------------------------- | |
917 // Generate a C2I adapter. On entry we know rbx, holds the methodOop during calls | |
918 // to the interpreter. The args start out packed in the compiled layout. They | |
919 // need to be unpacked into the interpreter layout. This will almost always | |
920 // require some stack space. We grow the current (compiled) stack, then repack | |
921 // the args. We finally end in a jump to the generic interpreter entry point. | |
922 // On exit from the interpreter, the interpreter will restore our SP (lest the | |
923 // compiled code, which relys solely on SP and not EBP, get sick). | |
924 | |
925 address c2i_unverified_entry = __ pc(); | |
926 Label skip_fixup; | |
927 | |
928 Register holder = rax; | |
929 Register receiver = rcx; | |
930 Register temp = rbx; | |
931 | |
932 { | |
933 | |
934 Label missed; | |
935 | |
936 __ verify_oop(holder); | |
304 | 937 __ movptr(temp, Address(receiver, oopDesc::klass_offset_in_bytes())); |
0 | 938 __ verify_oop(temp); |
939 | |
304 | 940 __ cmpptr(temp, Address(holder, compiledICHolderOopDesc::holder_klass_offset())); |
941 __ movptr(rbx, Address(holder, compiledICHolderOopDesc::holder_method_offset())); | |
0 | 942 __ jcc(Assembler::notEqual, missed); |
943 // Method might have been compiled since the call site was patched to | |
944 // interpreted if that is the case treat it as a miss so we can get | |
945 // the call site corrected. | |
304 | 946 __ cmpptr(Address(rbx, in_bytes(methodOopDesc::code_offset())), (int32_t)NULL_WORD); |
0 | 947 __ jcc(Assembler::equal, skip_fixup); |
948 | |
949 __ bind(missed); | |
950 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
951 } | |
952 | |
953 address c2i_entry = __ pc(); | |
954 | |
955 gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup); | |
956 | |
957 __ flush(); | |
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958 return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
0 | 959 } |
960 | |
961 int SharedRuntime::c_calling_convention(const BasicType *sig_bt, | |
962 VMRegPair *regs, | |
963 int total_args_passed) { | |
964 // We return the amount of VMRegImpl stack slots we need to reserve for all | |
965 // the arguments NOT counting out_preserve_stack_slots. | |
966 | |
967 uint stack = 0; // All arguments on stack | |
968 | |
969 for( int i = 0; i < total_args_passed; i++) { | |
970 // From the type and the argument number (count) compute the location | |
971 switch( sig_bt[i] ) { | |
972 case T_BOOLEAN: | |
973 case T_CHAR: | |
974 case T_FLOAT: | |
975 case T_BYTE: | |
976 case T_SHORT: | |
977 case T_INT: | |
978 case T_OBJECT: | |
979 case T_ARRAY: | |
980 case T_ADDRESS: | |
981 regs[i].set1(VMRegImpl::stack2reg(stack++)); | |
982 break; | |
983 case T_LONG: | |
984 case T_DOUBLE: // The stack numbering is reversed from Java | |
985 // Since C arguments do not get reversed, the ordering for | |
986 // doubles on the stack must be opposite the Java convention | |
987 assert(sig_bt[i+1] == T_VOID, "missing Half" ); | |
988 regs[i].set2(VMRegImpl::stack2reg(stack)); | |
989 stack += 2; | |
990 break; | |
991 case T_VOID: regs[i].set_bad(); break; | |
992 default: | |
993 ShouldNotReachHere(); | |
994 break; | |
995 } | |
996 } | |
997 return stack; | |
998 } | |
999 | |
1000 // A simple move of integer like type | |
1001 static void simple_move32(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1002 if (src.first()->is_stack()) { | |
1003 if (dst.first()->is_stack()) { | |
1004 // stack to stack | |
1005 // __ ld(FP, reg2offset(src.first()) + STACK_BIAS, L5); | |
1006 // __ st(L5, SP, reg2offset(dst.first()) + STACK_BIAS); | |
304 | 1007 __ movl2ptr(rax, Address(rbp, reg2offset_in(src.first()))); |
1008 __ movptr(Address(rsp, reg2offset_out(dst.first())), rax); | |
0 | 1009 } else { |
1010 // stack to reg | |
304 | 1011 __ movl2ptr(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()))); |
0 | 1012 } |
1013 } else if (dst.first()->is_stack()) { | |
1014 // reg to stack | |
304 | 1015 // no need to sign extend on 64bit |
1016 __ movptr(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); | |
0 | 1017 } else { |
304 | 1018 if (dst.first() != src.first()) { |
1019 __ mov(dst.first()->as_Register(), src.first()->as_Register()); | |
1020 } | |
0 | 1021 } |
1022 } | |
1023 | |
1024 // An oop arg. Must pass a handle not the oop itself | |
1025 static void object_move(MacroAssembler* masm, | |
1026 OopMap* map, | |
1027 int oop_handle_offset, | |
1028 int framesize_in_slots, | |
1029 VMRegPair src, | |
1030 VMRegPair dst, | |
1031 bool is_receiver, | |
1032 int* receiver_offset) { | |
1033 | |
1034 // Because of the calling conventions we know that src can be a | |
1035 // register or a stack location. dst can only be a stack location. | |
1036 | |
1037 assert(dst.first()->is_stack(), "must be stack"); | |
1038 // must pass a handle. First figure out the location we use as a handle | |
1039 | |
1040 if (src.first()->is_stack()) { | |
1041 // Oop is already on the stack as an argument | |
1042 Register rHandle = rax; | |
1043 Label nil; | |
304 | 1044 __ xorptr(rHandle, rHandle); |
1045 __ cmpptr(Address(rbp, reg2offset_in(src.first())), (int32_t)NULL_WORD); | |
0 | 1046 __ jcc(Assembler::equal, nil); |
304 | 1047 __ lea(rHandle, Address(rbp, reg2offset_in(src.first()))); |
0 | 1048 __ bind(nil); |
304 | 1049 __ movptr(Address(rsp, reg2offset_out(dst.first())), rHandle); |
0 | 1050 |
1051 int offset_in_older_frame = src.first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); | |
1052 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + framesize_in_slots)); | |
1053 if (is_receiver) { | |
1054 *receiver_offset = (offset_in_older_frame + framesize_in_slots) * VMRegImpl::stack_slot_size; | |
1055 } | |
1056 } else { | |
1057 // Oop is in an a register we must store it to the space we reserve | |
1058 // on the stack for oop_handles | |
1059 const Register rOop = src.first()->as_Register(); | |
1060 const Register rHandle = rax; | |
1061 int oop_slot = (rOop == rcx ? 0 : 1) * VMRegImpl::slots_per_word + oop_handle_offset; | |
1062 int offset = oop_slot*VMRegImpl::stack_slot_size; | |
1063 Label skip; | |
304 | 1064 __ movptr(Address(rsp, offset), rOop); |
0 | 1065 map->set_oop(VMRegImpl::stack2reg(oop_slot)); |
304 | 1066 __ xorptr(rHandle, rHandle); |
1067 __ cmpptr(rOop, (int32_t)NULL_WORD); | |
0 | 1068 __ jcc(Assembler::equal, skip); |
304 | 1069 __ lea(rHandle, Address(rsp, offset)); |
0 | 1070 __ bind(skip); |
1071 // Store the handle parameter | |
304 | 1072 __ movptr(Address(rsp, reg2offset_out(dst.first())), rHandle); |
0 | 1073 if (is_receiver) { |
1074 *receiver_offset = offset; | |
1075 } | |
1076 } | |
1077 } | |
1078 | |
1079 // A float arg may have to do float reg int reg conversion | |
1080 static void float_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1081 assert(!src.second()->is_valid() && !dst.second()->is_valid(), "bad float_move"); | |
1082 | |
1083 // Because of the calling convention we know that src is either a stack location | |
1084 // or an xmm register. dst can only be a stack location. | |
1085 | |
1086 assert(dst.first()->is_stack() && ( src.first()->is_stack() || src.first()->is_XMMRegister()), "bad parameters"); | |
1087 | |
1088 if (src.first()->is_stack()) { | |
1089 __ movl(rax, Address(rbp, reg2offset_in(src.first()))); | |
304 | 1090 __ movptr(Address(rsp, reg2offset_out(dst.first())), rax); |
0 | 1091 } else { |
1092 // reg to stack | |
1093 __ movflt(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); | |
1094 } | |
1095 } | |
1096 | |
1097 // A long move | |
1098 static void long_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1099 | |
1100 // The only legal possibility for a long_move VMRegPair is: | |
1101 // 1: two stack slots (possibly unaligned) | |
1102 // as neither the java or C calling convention will use registers | |
1103 // for longs. | |
1104 | |
1105 if (src.first()->is_stack() && dst.first()->is_stack()) { | |
1106 assert(src.second()->is_stack() && dst.second()->is_stack(), "must be all stack"); | |
304 | 1107 __ movptr(rax, Address(rbp, reg2offset_in(src.first()))); |
1108 NOT_LP64(__ movptr(rbx, Address(rbp, reg2offset_in(src.second())))); | |
1109 __ movptr(Address(rsp, reg2offset_out(dst.first())), rax); | |
1110 NOT_LP64(__ movptr(Address(rsp, reg2offset_out(dst.second())), rbx)); | |
0 | 1111 } else { |
1112 ShouldNotReachHere(); | |
1113 } | |
1114 } | |
1115 | |
1116 // A double move | |
1117 static void double_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1118 | |
1119 // The only legal possibilities for a double_move VMRegPair are: | |
1120 // The painful thing here is that like long_move a VMRegPair might be | |
1121 | |
1122 // Because of the calling convention we know that src is either | |
1123 // 1: a single physical register (xmm registers only) | |
1124 // 2: two stack slots (possibly unaligned) | |
1125 // dst can only be a pair of stack slots. | |
1126 | |
1127 assert(dst.first()->is_stack() && (src.first()->is_XMMRegister() || src.first()->is_stack()), "bad args"); | |
1128 | |
1129 if (src.first()->is_stack()) { | |
1130 // source is all stack | |
304 | 1131 __ movptr(rax, Address(rbp, reg2offset_in(src.first()))); |
1132 NOT_LP64(__ movptr(rbx, Address(rbp, reg2offset_in(src.second())))); | |
1133 __ movptr(Address(rsp, reg2offset_out(dst.first())), rax); | |
1134 NOT_LP64(__ movptr(Address(rsp, reg2offset_out(dst.second())), rbx)); | |
0 | 1135 } else { |
1136 // reg to stack | |
1137 // No worries about stack alignment | |
1138 __ movdbl(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); | |
1139 } | |
1140 } | |
1141 | |
1142 | |
1143 void SharedRuntime::save_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1144 // We always ignore the frame_slots arg and just use the space just below frame pointer | |
1145 // which by this time is free to use | |
1146 switch (ret_type) { | |
1147 case T_FLOAT: | |
1148 __ fstp_s(Address(rbp, -wordSize)); | |
1149 break; | |
1150 case T_DOUBLE: | |
1151 __ fstp_d(Address(rbp, -2*wordSize)); | |
1152 break; | |
1153 case T_VOID: break; | |
1154 case T_LONG: | |
304 | 1155 __ movptr(Address(rbp, -wordSize), rax); |
1156 NOT_LP64(__ movptr(Address(rbp, -2*wordSize), rdx)); | |
0 | 1157 break; |
1158 default: { | |
304 | 1159 __ movptr(Address(rbp, -wordSize), rax); |
0 | 1160 } |
1161 } | |
1162 } | |
1163 | |
1164 void SharedRuntime::restore_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1165 // We always ignore the frame_slots arg and just use the space just below frame pointer | |
1166 // which by this time is free to use | |
1167 switch (ret_type) { | |
1168 case T_FLOAT: | |
1169 __ fld_s(Address(rbp, -wordSize)); | |
1170 break; | |
1171 case T_DOUBLE: | |
1172 __ fld_d(Address(rbp, -2*wordSize)); | |
1173 break; | |
1174 case T_LONG: | |
304 | 1175 __ movptr(rax, Address(rbp, -wordSize)); |
1176 NOT_LP64(__ movptr(rdx, Address(rbp, -2*wordSize))); | |
0 | 1177 break; |
1178 case T_VOID: break; | |
1179 default: { | |
304 | 1180 __ movptr(rax, Address(rbp, -wordSize)); |
0 | 1181 } |
1182 } | |
1183 } | |
1184 | |
1185 // --------------------------------------------------------------------------- | |
1186 // Generate a native wrapper for a given method. The method takes arguments | |
1187 // in the Java compiled code convention, marshals them to the native | |
1188 // convention (handlizes oops, etc), transitions to native, makes the call, | |
1189 // returns to java state (possibly blocking), unhandlizes any result and | |
1190 // returns. | |
1191 nmethod *SharedRuntime::generate_native_wrapper(MacroAssembler *masm, | |
1192 methodHandle method, | |
1193 int total_in_args, | |
1194 int comp_args_on_stack, | |
1195 BasicType *in_sig_bt, | |
1196 VMRegPair *in_regs, | |
1197 BasicType ret_type) { | |
1198 | |
1199 // An OopMap for lock (and class if static) | |
1200 OopMapSet *oop_maps = new OopMapSet(); | |
1201 | |
1202 // We have received a description of where all the java arg are located | |
1203 // on entry to the wrapper. We need to convert these args to where | |
1204 // the jni function will expect them. To figure out where they go | |
1205 // we convert the java signature to a C signature by inserting | |
1206 // the hidden arguments as arg[0] and possibly arg[1] (static method) | |
1207 | |
1208 int total_c_args = total_in_args + 1; | |
1209 if (method->is_static()) { | |
1210 total_c_args++; | |
1211 } | |
1212 | |
1213 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_c_args); | |
1214 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_c_args); | |
1215 | |
1216 int argc = 0; | |
1217 out_sig_bt[argc++] = T_ADDRESS; | |
1218 if (method->is_static()) { | |
1219 out_sig_bt[argc++] = T_OBJECT; | |
1220 } | |
1221 | |
1222 int i; | |
1223 for (i = 0; i < total_in_args ; i++ ) { | |
1224 out_sig_bt[argc++] = in_sig_bt[i]; | |
1225 } | |
1226 | |
1227 | |
1228 // Now figure out where the args must be stored and how much stack space | |
1229 // they require (neglecting out_preserve_stack_slots but space for storing | |
1230 // the 1st six register arguments). It's weird see int_stk_helper. | |
1231 // | |
1232 int out_arg_slots; | |
1233 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); | |
1234 | |
1235 // Compute framesize for the wrapper. We need to handlize all oops in | |
1236 // registers a max of 2 on x86. | |
1237 | |
1238 // Calculate the total number of stack slots we will need. | |
1239 | |
1240 // First count the abi requirement plus all of the outgoing args | |
1241 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; | |
1242 | |
1243 // Now the space for the inbound oop handle area | |
1244 | |
1245 int oop_handle_offset = stack_slots; | |
1246 stack_slots += 2*VMRegImpl::slots_per_word; | |
1247 | |
1248 // Now any space we need for handlizing a klass if static method | |
1249 | |
1250 int klass_slot_offset = 0; | |
1251 int klass_offset = -1; | |
1252 int lock_slot_offset = 0; | |
1253 bool is_static = false; | |
1254 int oop_temp_slot_offset = 0; | |
1255 | |
1256 if (method->is_static()) { | |
1257 klass_slot_offset = stack_slots; | |
1258 stack_slots += VMRegImpl::slots_per_word; | |
1259 klass_offset = klass_slot_offset * VMRegImpl::stack_slot_size; | |
1260 is_static = true; | |
1261 } | |
1262 | |
1263 // Plus a lock if needed | |
1264 | |
1265 if (method->is_synchronized()) { | |
1266 lock_slot_offset = stack_slots; | |
1267 stack_slots += VMRegImpl::slots_per_word; | |
1268 } | |
1269 | |
1270 // Now a place (+2) to save return values or temp during shuffling | |
1271 // + 2 for return address (which we own) and saved rbp, | |
1272 stack_slots += 4; | |
1273 | |
1274 // Ok The space we have allocated will look like: | |
1275 // | |
1276 // | |
1277 // FP-> | | | |
1278 // |---------------------| | |
1279 // | 2 slots for moves | | |
1280 // |---------------------| | |
1281 // | lock box (if sync) | | |
1282 // |---------------------| <- lock_slot_offset (-lock_slot_rbp_offset) | |
1283 // | klass (if static) | | |
1284 // |---------------------| <- klass_slot_offset | |
1285 // | oopHandle area | | |
1286 // |---------------------| <- oop_handle_offset (a max of 2 registers) | |
1287 // | outbound memory | | |
1288 // | based arguments | | |
1289 // | | | |
1290 // |---------------------| | |
1291 // | | | |
1292 // SP-> | out_preserved_slots | | |
1293 // | |
1294 // | |
1295 // **************************************************************************** | |
1296 // WARNING - on Windows Java Natives use pascal calling convention and pop the | |
1297 // arguments off of the stack after the jni call. Before the call we can use | |
1298 // instructions that are SP relative. After the jni call we switch to FP | |
1299 // relative instructions instead of re-adjusting the stack on windows. | |
1300 // **************************************************************************** | |
1301 | |
1302 | |
1303 // Now compute actual number of stack words we need rounding to make | |
1304 // stack properly aligned. | |
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1305 stack_slots = round_to(stack_slots, StackAlignmentInSlots); |
0 | 1306 |
1307 int stack_size = stack_slots * VMRegImpl::stack_slot_size; | |
1308 | |
1309 intptr_t start = (intptr_t)__ pc(); | |
1310 | |
1311 // First thing make an ic check to see if we should even be here | |
1312 | |
1313 // We are free to use all registers as temps without saving them and | |
1314 // restoring them except rbp,. rbp, is the only callee save register | |
1315 // as far as the interpreter and the compiler(s) are concerned. | |
1316 | |
1317 | |
1318 const Register ic_reg = rax; | |
1319 const Register receiver = rcx; | |
1320 Label hit; | |
1321 Label exception_pending; | |
1322 | |
1323 | |
1324 __ verify_oop(receiver); | |
304 | 1325 __ cmpptr(ic_reg, Address(receiver, oopDesc::klass_offset_in_bytes())); |
0 | 1326 __ jcc(Assembler::equal, hit); |
1327 | |
1328 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
1329 | |
1330 // verified entry must be aligned for code patching. | |
1331 // and the first 5 bytes must be in the same cache line | |
1332 // if we align at 8 then we will be sure 5 bytes are in the same line | |
1333 __ align(8); | |
1334 | |
1335 __ bind(hit); | |
1336 | |
1337 int vep_offset = ((intptr_t)__ pc()) - start; | |
1338 | |
1339 #ifdef COMPILER1 | |
1340 if (InlineObjectHash && method->intrinsic_id() == vmIntrinsics::_hashCode) { | |
1341 // Object.hashCode can pull the hashCode from the header word | |
1342 // instead of doing a full VM transition once it's been computed. | |
1343 // Since hashCode is usually polymorphic at call sites we can't do | |
1344 // this optimization at the call site without a lot of work. | |
1345 Label slowCase; | |
1346 Register receiver = rcx; | |
1347 Register result = rax; | |
304 | 1348 __ movptr(result, Address(receiver, oopDesc::mark_offset_in_bytes())); |
0 | 1349 |
1350 // check if locked | |
304 | 1351 __ testptr(result, markOopDesc::unlocked_value); |
0 | 1352 __ jcc (Assembler::zero, slowCase); |
1353 | |
1354 if (UseBiasedLocking) { | |
1355 // Check if biased and fall through to runtime if so | |
304 | 1356 __ testptr(result, markOopDesc::biased_lock_bit_in_place); |
0 | 1357 __ jcc (Assembler::notZero, slowCase); |
1358 } | |
1359 | |
1360 // get hash | |
304 | 1361 __ andptr(result, markOopDesc::hash_mask_in_place); |
0 | 1362 // test if hashCode exists |
1363 __ jcc (Assembler::zero, slowCase); | |
304 | 1364 __ shrptr(result, markOopDesc::hash_shift); |
0 | 1365 __ ret(0); |
1366 __ bind (slowCase); | |
1367 } | |
1368 #endif // COMPILER1 | |
1369 | |
1370 // The instruction at the verified entry point must be 5 bytes or longer | |
1371 // because it can be patched on the fly by make_non_entrant. The stack bang | |
1372 // instruction fits that requirement. | |
1373 | |
1374 // Generate stack overflow check | |
1375 | |
1376 if (UseStackBanging) { | |
1377 __ bang_stack_with_offset(StackShadowPages*os::vm_page_size()); | |
1378 } else { | |
1379 // need a 5 byte instruction to allow MT safe patching to non-entrant | |
1380 __ fat_nop(); | |
1381 } | |
1382 | |
1383 // Generate a new frame for the wrapper. | |
1384 __ enter(); | |
1385 // -2 because return address is already present and so is saved rbp, | |
304 | 1386 __ subptr(rsp, stack_size - 2*wordSize); |
0 | 1387 |
1388 // Frame is now completed as far a size and linkage. | |
1389 | |
1390 int frame_complete = ((intptr_t)__ pc()) - start; | |
1391 | |
1392 // Calculate the difference between rsp and rbp,. We need to know it | |
1393 // after the native call because on windows Java Natives will pop | |
1394 // the arguments and it is painful to do rsp relative addressing | |
1395 // in a platform independent way. So after the call we switch to | |
1396 // rbp, relative addressing. | |
1397 | |
1398 int fp_adjustment = stack_size - 2*wordSize; | |
1399 | |
1400 #ifdef COMPILER2 | |
1401 // C2 may leave the stack dirty if not in SSE2+ mode | |
1402 if (UseSSE >= 2) { | |
1403 __ verify_FPU(0, "c2i transition should have clean FPU stack"); | |
1404 } else { | |
1405 __ empty_FPU_stack(); | |
1406 } | |
1407 #endif /* COMPILER2 */ | |
1408 | |
1409 // Compute the rbp, offset for any slots used after the jni call | |
1410 | |
1411 int lock_slot_rbp_offset = (lock_slot_offset*VMRegImpl::stack_slot_size) - fp_adjustment; | |
1412 int oop_temp_slot_rbp_offset = (oop_temp_slot_offset*VMRegImpl::stack_slot_size) - fp_adjustment; | |
1413 | |
1414 // We use rdi as a thread pointer because it is callee save and | |
1415 // if we load it once it is usable thru the entire wrapper | |
1416 const Register thread = rdi; | |
1417 | |
1418 // We use rsi as the oop handle for the receiver/klass | |
1419 // It is callee save so it survives the call to native | |
1420 | |
1421 const Register oop_handle_reg = rsi; | |
1422 | |
1423 __ get_thread(thread); | |
1424 | |
1425 | |
1426 // | |
1427 // We immediately shuffle the arguments so that any vm call we have to | |
1428 // make from here on out (sync slow path, jvmti, etc.) we will have | |
1429 // captured the oops from our caller and have a valid oopMap for | |
1430 // them. | |
1431 | |
1432 // ----------------- | |
1433 // The Grand Shuffle | |
1434 // | |
1435 // Natives require 1 or 2 extra arguments over the normal ones: the JNIEnv* | |
1436 // and, if static, the class mirror instead of a receiver. This pretty much | |
1437 // guarantees that register layout will not match (and x86 doesn't use reg | |
1438 // parms though amd does). Since the native abi doesn't use register args | |
1439 // and the java conventions does we don't have to worry about collisions. | |
1440 // All of our moved are reg->stack or stack->stack. | |
1441 // We ignore the extra arguments during the shuffle and handle them at the | |
1442 // last moment. The shuffle is described by the two calling convention | |
1443 // vectors we have in our possession. We simply walk the java vector to | |
1444 // get the source locations and the c vector to get the destinations. | |
1445 | |
1446 int c_arg = method->is_static() ? 2 : 1 ; | |
1447 | |
1448 // Record rsp-based slot for receiver on stack for non-static methods | |
1449 int receiver_offset = -1; | |
1450 | |
1451 // This is a trick. We double the stack slots so we can claim | |
1452 // the oops in the caller's frame. Since we are sure to have | |
1453 // more args than the caller doubling is enough to make | |
1454 // sure we can capture all the incoming oop args from the | |
1455 // caller. | |
1456 // | |
1457 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); | |
1458 | |
1459 // Mark location of rbp, | |
1460 // map->set_callee_saved(VMRegImpl::stack2reg( stack_slots - 2), stack_slots * 2, 0, rbp->as_VMReg()); | |
1461 | |
1462 // We know that we only have args in at most two integer registers (rcx, rdx). So rax, rbx | |
1463 // Are free to temporaries if we have to do stack to steck moves. | |
1464 // All inbound args are referenced based on rbp, and all outbound args via rsp. | |
1465 | |
1466 for (i = 0; i < total_in_args ; i++, c_arg++ ) { | |
1467 switch (in_sig_bt[i]) { | |
1468 case T_ARRAY: | |
1469 case T_OBJECT: | |
1470 object_move(masm, map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg], | |
1471 ((i == 0) && (!is_static)), | |
1472 &receiver_offset); | |
1473 break; | |
1474 case T_VOID: | |
1475 break; | |
1476 | |
1477 case T_FLOAT: | |
1478 float_move(masm, in_regs[i], out_regs[c_arg]); | |
1479 break; | |
1480 | |
1481 case T_DOUBLE: | |
1482 assert( i + 1 < total_in_args && | |
1483 in_sig_bt[i + 1] == T_VOID && | |
1484 out_sig_bt[c_arg+1] == T_VOID, "bad arg list"); | |
1485 double_move(masm, in_regs[i], out_regs[c_arg]); | |
1486 break; | |
1487 | |
1488 case T_LONG : | |
1489 long_move(masm, in_regs[i], out_regs[c_arg]); | |
1490 break; | |
1491 | |
1492 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); | |
1493 | |
1494 default: | |
1495 simple_move32(masm, in_regs[i], out_regs[c_arg]); | |
1496 } | |
1497 } | |
1498 | |
1499 // Pre-load a static method's oop into rsi. Used both by locking code and | |
1500 // the normal JNI call code. | |
1501 if (method->is_static()) { | |
1502 | |
1503 // load opp into a register | |
1504 __ movoop(oop_handle_reg, JNIHandles::make_local(Klass::cast(method->method_holder())->java_mirror())); | |
1505 | |
1506 // Now handlize the static class mirror it's known not-null. | |
304 | 1507 __ movptr(Address(rsp, klass_offset), oop_handle_reg); |
0 | 1508 map->set_oop(VMRegImpl::stack2reg(klass_slot_offset)); |
1509 | |
1510 // Now get the handle | |
304 | 1511 __ lea(oop_handle_reg, Address(rsp, klass_offset)); |
0 | 1512 // store the klass handle as second argument |
304 | 1513 __ movptr(Address(rsp, wordSize), oop_handle_reg); |
0 | 1514 } |
1515 | |
1516 // Change state to native (we save the return address in the thread, since it might not | |
1517 // be pushed on the stack when we do a a stack traversal). It is enough that the pc() | |
1518 // points into the right code segment. It does not have to be the correct return pc. | |
1519 // We use the same pc/oopMap repeatedly when we call out | |
1520 | |
1521 intptr_t the_pc = (intptr_t) __ pc(); | |
1522 oop_maps->add_gc_map(the_pc - start, map); | |
1523 | |
1524 __ set_last_Java_frame(thread, rsp, noreg, (address)the_pc); | |
1525 | |
1526 | |
1527 // We have all of the arguments setup at this point. We must not touch any register | |
1528 // argument registers at this point (what if we save/restore them there are no oop? | |
1529 | |
1530 { | |
1531 SkipIfEqual skip_if(masm, &DTraceMethodProbes, 0); | |
1532 __ movoop(rax, JNIHandles::make_local(method())); | |
1533 __ call_VM_leaf( | |
1534 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
1535 thread, rax); | |
1536 } | |
1537 | |
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1538 // RedefineClasses() tracing support for obsolete method entry |
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1539 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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1540 __ movoop(rax, JNIHandles::make_local(method())); |
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1541 __ call_VM_leaf( |
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1542 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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1543 thread, rax); |
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1544 } |
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1545 |
0 | 1546 // These are register definitions we need for locking/unlocking |
1547 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction | |
1548 const Register obj_reg = rcx; // Will contain the oop | |
1549 const Register lock_reg = rdx; // Address of compiler lock object (BasicLock) | |
1550 | |
1551 Label slow_path_lock; | |
1552 Label lock_done; | |
1553 | |
1554 // Lock a synchronized method | |
1555 if (method->is_synchronized()) { | |
1556 | |
1557 | |
1558 const int mark_word_offset = BasicLock::displaced_header_offset_in_bytes(); | |
1559 | |
1560 // Get the handle (the 2nd argument) | |
304 | 1561 __ movptr(oop_handle_reg, Address(rsp, wordSize)); |
0 | 1562 |
1563 // Get address of the box | |
1564 | |
304 | 1565 __ lea(lock_reg, Address(rbp, lock_slot_rbp_offset)); |
0 | 1566 |
1567 // Load the oop from the handle | |
304 | 1568 __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
0 | 1569 |
1570 if (UseBiasedLocking) { | |
1571 // Note that oop_handle_reg is trashed during this call | |
1572 __ biased_locking_enter(lock_reg, obj_reg, swap_reg, oop_handle_reg, false, lock_done, &slow_path_lock); | |
1573 } | |
1574 | |
1575 // Load immediate 1 into swap_reg %rax, | |
304 | 1576 __ movptr(swap_reg, 1); |
0 | 1577 |
1578 // Load (object->mark() | 1) into swap_reg %rax, | |
304 | 1579 __ orptr(swap_reg, Address(obj_reg, 0)); |
0 | 1580 |
1581 // Save (object->mark() | 1) into BasicLock's displaced header | |
304 | 1582 __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
0 | 1583 |
1584 if (os::is_MP()) { | |
1585 __ lock(); | |
1586 } | |
1587 | |
1588 // src -> dest iff dest == rax, else rax, <- dest | |
1589 // *obj_reg = lock_reg iff *obj_reg == rax, else rax, = *(obj_reg) | |
304 | 1590 __ cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
0 | 1591 __ jcc(Assembler::equal, lock_done); |
1592 | |
1593 // Test if the oopMark is an obvious stack pointer, i.e., | |
1594 // 1) (mark & 3) == 0, and | |
1595 // 2) rsp <= mark < mark + os::pagesize() | |
1596 // These 3 tests can be done by evaluating the following | |
1597 // expression: ((mark - rsp) & (3 - os::vm_page_size())), | |
1598 // assuming both stack pointer and pagesize have their | |
1599 // least significant 2 bits clear. | |
1600 // NOTE: the oopMark is in swap_reg %rax, as the result of cmpxchg | |
1601 | |
304 | 1602 __ subptr(swap_reg, rsp); |
1603 __ andptr(swap_reg, 3 - os::vm_page_size()); | |
0 | 1604 |
1605 // Save the test result, for recursive case, the result is zero | |
304 | 1606 __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
0 | 1607 __ jcc(Assembler::notEqual, slow_path_lock); |
1608 // Slow path will re-enter here | |
1609 __ bind(lock_done); | |
1610 | |
1611 if (UseBiasedLocking) { | |
1612 // Re-fetch oop_handle_reg as we trashed it above | |
304 | 1613 __ movptr(oop_handle_reg, Address(rsp, wordSize)); |
0 | 1614 } |
1615 } | |
1616 | |
1617 | |
1618 // Finally just about ready to make the JNI call | |
1619 | |
1620 | |
1621 // get JNIEnv* which is first argument to native | |
1622 | |
304 | 1623 __ lea(rdx, Address(thread, in_bytes(JavaThread::jni_environment_offset()))); |
1624 __ movptr(Address(rsp, 0), rdx); | |
0 | 1625 |
1626 // Now set thread in native | |
1627 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native); | |
1628 | |
1629 __ call(RuntimeAddress(method->native_function())); | |
1630 | |
1631 // WARNING - on Windows Java Natives use pascal calling convention and pop the | |
1632 // arguments off of the stack. We could just re-adjust the stack pointer here | |
1633 // and continue to do SP relative addressing but we instead switch to FP | |
1634 // relative addressing. | |
1635 | |
1636 // Unpack native results. | |
1637 switch (ret_type) { | |
1638 case T_BOOLEAN: __ c2bool(rax); break; | |
304 | 1639 case T_CHAR : __ andptr(rax, 0xFFFF); break; |
0 | 1640 case T_BYTE : __ sign_extend_byte (rax); break; |
1641 case T_SHORT : __ sign_extend_short(rax); break; | |
1642 case T_INT : /* nothing to do */ break; | |
1643 case T_DOUBLE : | |
1644 case T_FLOAT : | |
1645 // Result is in st0 we'll save as needed | |
1646 break; | |
1647 case T_ARRAY: // Really a handle | |
1648 case T_OBJECT: // Really a handle | |
1649 break; // can't de-handlize until after safepoint check | |
1650 case T_VOID: break; | |
1651 case T_LONG: break; | |
1652 default : ShouldNotReachHere(); | |
1653 } | |
1654 | |
1655 // Switch thread to "native transition" state before reading the synchronization state. | |
1656 // This additional state is necessary because reading and testing the synchronization | |
1657 // state is not atomic w.r.t. GC, as this scenario demonstrates: | |
1658 // Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted. | |
1659 // VM thread changes sync state to synchronizing and suspends threads for GC. | |
1660 // Thread A is resumed to finish this native method, but doesn't block here since it | |
1661 // didn't see any synchronization is progress, and escapes. | |
1662 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native_trans); | |
1663 | |
1664 if(os::is_MP()) { | |
1665 if (UseMembar) { | |
304 | 1666 // Force this write out before the read below |
1667 __ membar(Assembler::Membar_mask_bits( | |
1668 Assembler::LoadLoad | Assembler::LoadStore | | |
1669 Assembler::StoreLoad | Assembler::StoreStore)); | |
0 | 1670 } else { |
1671 // Write serialization page so VM thread can do a pseudo remote membar. | |
1672 // We use the current thread pointer to calculate a thread specific | |
1673 // offset to write to within the page. This minimizes bus traffic | |
1674 // due to cache line collision. | |
1675 __ serialize_memory(thread, rcx); | |
1676 } | |
1677 } | |
1678 | |
1679 if (AlwaysRestoreFPU) { | |
1680 // Make sure the control word is correct. | |
1681 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); | |
1682 } | |
1683 | |
1684 // check for safepoint operation in progress and/or pending suspend requests | |
1685 { Label Continue; | |
1686 | |
1687 __ cmp32(ExternalAddress((address)SafepointSynchronize::address_of_state()), | |
1688 SafepointSynchronize::_not_synchronized); | |
1689 | |
1690 Label L; | |
1691 __ jcc(Assembler::notEqual, L); | |
1692 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0); | |
1693 __ jcc(Assembler::equal, Continue); | |
1694 __ bind(L); | |
1695 | |
1696 // Don't use call_VM as it will see a possible pending exception and forward it | |
1697 // and never return here preventing us from clearing _last_native_pc down below. | |
1698 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are | |
1699 // preserved and correspond to the bcp/locals pointers. So we do a runtime call | |
1700 // by hand. | |
1701 // | |
1702 save_native_result(masm, ret_type, stack_slots); | |
304 | 1703 __ push(thread); |
0 | 1704 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, |
1705 JavaThread::check_special_condition_for_native_trans))); | |
1706 __ increment(rsp, wordSize); | |
1707 // Restore any method result value | |
1708 restore_native_result(masm, ret_type, stack_slots); | |
1709 | |
1710 __ bind(Continue); | |
1711 } | |
1712 | |
1713 // change thread state | |
1714 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java); | |
1715 | |
1716 Label reguard; | |
1717 Label reguard_done; | |
1718 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled); | |
1719 __ jcc(Assembler::equal, reguard); | |
1720 | |
1721 // slow path reguard re-enters here | |
1722 __ bind(reguard_done); | |
1723 | |
1724 // Handle possible exception (will unlock if necessary) | |
1725 | |
1726 // native result if any is live | |
1727 | |
1728 // Unlock | |
1729 Label slow_path_unlock; | |
1730 Label unlock_done; | |
1731 if (method->is_synchronized()) { | |
1732 | |
1733 Label done; | |
1734 | |
1735 // Get locked oop from the handle we passed to jni | |
304 | 1736 __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
0 | 1737 |
1738 if (UseBiasedLocking) { | |
1739 __ biased_locking_exit(obj_reg, rbx, done); | |
1740 } | |
1741 | |
1742 // Simple recursive lock? | |
1743 | |
304 | 1744 __ cmpptr(Address(rbp, lock_slot_rbp_offset), (int32_t)NULL_WORD); |
0 | 1745 __ jcc(Assembler::equal, done); |
1746 | |
1747 // Must save rax, if if it is live now because cmpxchg must use it | |
1748 if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { | |
1749 save_native_result(masm, ret_type, stack_slots); | |
1750 } | |
1751 | |
1752 // get old displaced header | |
304 | 1753 __ movptr(rbx, Address(rbp, lock_slot_rbp_offset)); |
0 | 1754 |
1755 // get address of the stack lock | |
304 | 1756 __ lea(rax, Address(rbp, lock_slot_rbp_offset)); |
0 | 1757 |
1758 // Atomic swap old header if oop still contains the stack lock | |
1759 if (os::is_MP()) { | |
1760 __ lock(); | |
1761 } | |
1762 | |
1763 // src -> dest iff dest == rax, else rax, <- dest | |
1764 // *obj_reg = rbx, iff *obj_reg == rax, else rax, = *(obj_reg) | |
304 | 1765 __ cmpxchgptr(rbx, Address(obj_reg, 0)); |
0 | 1766 __ jcc(Assembler::notEqual, slow_path_unlock); |
1767 | |
1768 // slow path re-enters here | |
1769 __ bind(unlock_done); | |
1770 if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { | |
1771 restore_native_result(masm, ret_type, stack_slots); | |
1772 } | |
1773 | |
1774 __ bind(done); | |
1775 | |
1776 } | |
1777 | |
1778 { | |
1779 SkipIfEqual skip_if(masm, &DTraceMethodProbes, 0); | |
1780 // Tell dtrace about this method exit | |
1781 save_native_result(masm, ret_type, stack_slots); | |
1782 __ movoop(rax, JNIHandles::make_local(method())); | |
1783 __ call_VM_leaf( | |
1784 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
1785 thread, rax); | |
1786 restore_native_result(masm, ret_type, stack_slots); | |
1787 } | |
1788 | |
1789 // We can finally stop using that last_Java_frame we setup ages ago | |
1790 | |
1791 __ reset_last_Java_frame(thread, false, true); | |
1792 | |
1793 // Unpack oop result | |
1794 if (ret_type == T_OBJECT || ret_type == T_ARRAY) { | |
1795 Label L; | |
304 | 1796 __ cmpptr(rax, (int32_t)NULL_WORD); |
0 | 1797 __ jcc(Assembler::equal, L); |
304 | 1798 __ movptr(rax, Address(rax, 0)); |
0 | 1799 __ bind(L); |
1800 __ verify_oop(rax); | |
1801 } | |
1802 | |
1803 // reset handle block | |
304 | 1804 __ movptr(rcx, Address(thread, JavaThread::active_handles_offset())); |
1805 | |
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1806 __ movptr(Address(rcx, JNIHandleBlock::top_offset_in_bytes()), NULL_WORD); |
0 | 1807 |
1808 // Any exception pending? | |
304 | 1809 __ cmpptr(Address(thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
0 | 1810 __ jcc(Assembler::notEqual, exception_pending); |
1811 | |
1812 | |
1813 // no exception, we're almost done | |
1814 | |
1815 // check that only result value is on FPU stack | |
1816 __ verify_FPU(ret_type == T_FLOAT || ret_type == T_DOUBLE ? 1 : 0, "native_wrapper normal exit"); | |
1817 | |
1818 // Fixup floating pointer results so that result looks like a return from a compiled method | |
1819 if (ret_type == T_FLOAT) { | |
1820 if (UseSSE >= 1) { | |
1821 // Pop st0 and store as float and reload into xmm register | |
1822 __ fstp_s(Address(rbp, -4)); | |
1823 __ movflt(xmm0, Address(rbp, -4)); | |
1824 } | |
1825 } else if (ret_type == T_DOUBLE) { | |
1826 if (UseSSE >= 2) { | |
1827 // Pop st0 and store as double and reload into xmm register | |
1828 __ fstp_d(Address(rbp, -8)); | |
1829 __ movdbl(xmm0, Address(rbp, -8)); | |
1830 } | |
1831 } | |
1832 | |
1833 // Return | |
1834 | |
1835 __ leave(); | |
1836 __ ret(0); | |
1837 | |
1838 // Unexpected paths are out of line and go here | |
1839 | |
1840 // Slow path locking & unlocking | |
1841 if (method->is_synchronized()) { | |
1842 | |
1843 // BEGIN Slow path lock | |
1844 | |
1845 __ bind(slow_path_lock); | |
1846 | |
1847 // has last_Java_frame setup. No exceptions so do vanilla call not call_VM | |
1848 // args are (oop obj, BasicLock* lock, JavaThread* thread) | |
304 | 1849 __ push(thread); |
1850 __ push(lock_reg); | |
1851 __ push(obj_reg); | |
0 | 1852 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_locking_C))); |
304 | 1853 __ addptr(rsp, 3*wordSize); |
0 | 1854 |
1855 #ifdef ASSERT | |
1856 { Label L; | |
304 | 1857 __ cmpptr(Address(thread, in_bytes(Thread::pending_exception_offset())), (int)NULL_WORD); |
0 | 1858 __ jcc(Assembler::equal, L); |
1859 __ stop("no pending exception allowed on exit from monitorenter"); | |
1860 __ bind(L); | |
1861 } | |
1862 #endif | |
1863 __ jmp(lock_done); | |
1864 | |
1865 // END Slow path lock | |
1866 | |
1867 // BEGIN Slow path unlock | |
1868 __ bind(slow_path_unlock); | |
1869 | |
1870 // Slow path unlock | |
1871 | |
1872 if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { | |
1873 save_native_result(masm, ret_type, stack_slots); | |
1874 } | |
1875 // Save pending exception around call to VM (which contains an EXCEPTION_MARK) | |
1876 | |
304 | 1877 __ pushptr(Address(thread, in_bytes(Thread::pending_exception_offset()))); |
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1878 __ movptr(Address(thread, in_bytes(Thread::pending_exception_offset())), NULL_WORD); |
0 | 1879 |
1880 | |
1881 // should be a peal | |
1882 // +wordSize because of the push above | |
304 | 1883 __ lea(rax, Address(rbp, lock_slot_rbp_offset)); |
1884 __ push(rax); | |
1885 | |
1886 __ push(obj_reg); | |
0 | 1887 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_unlocking_C))); |
304 | 1888 __ addptr(rsp, 2*wordSize); |
0 | 1889 #ifdef ASSERT |
1890 { | |
1891 Label L; | |
304 | 1892 __ cmpptr(Address(thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
0 | 1893 __ jcc(Assembler::equal, L); |
1894 __ stop("no pending exception allowed on exit complete_monitor_unlocking_C"); | |
1895 __ bind(L); | |
1896 } | |
1897 #endif /* ASSERT */ | |
1898 | |
304 | 1899 __ popptr(Address(thread, in_bytes(Thread::pending_exception_offset()))); |
0 | 1900 |
1901 if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { | |
1902 restore_native_result(masm, ret_type, stack_slots); | |
1903 } | |
1904 __ jmp(unlock_done); | |
1905 // END Slow path unlock | |
1906 | |
1907 } | |
1908 | |
1909 // SLOW PATH Reguard the stack if needed | |
1910 | |
1911 __ bind(reguard); | |
1912 save_native_result(masm, ret_type, stack_slots); | |
1913 { | |
1914 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); | |
1915 } | |
1916 restore_native_result(masm, ret_type, stack_slots); | |
1917 __ jmp(reguard_done); | |
1918 | |
1919 | |
1920 // BEGIN EXCEPTION PROCESSING | |
1921 | |
1922 // Forward the exception | |
1923 __ bind(exception_pending); | |
1924 | |
1925 // remove possible return value from FPU register stack | |
1926 __ empty_FPU_stack(); | |
1927 | |
1928 // pop our frame | |
1929 __ leave(); | |
1930 // and forward the exception | |
1931 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
1932 | |
1933 __ flush(); | |
1934 | |
1935 nmethod *nm = nmethod::new_native_nmethod(method, | |
1936 masm->code(), | |
1937 vep_offset, | |
1938 frame_complete, | |
1939 stack_slots / VMRegImpl::slots_per_word, | |
1940 (is_static ? in_ByteSize(klass_offset) : in_ByteSize(receiver_offset)), | |
1941 in_ByteSize(lock_slot_offset*VMRegImpl::stack_slot_size), | |
1942 oop_maps); | |
1943 return nm; | |
1944 | |
1945 } | |
1946 | |
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1947 #ifdef HAVE_DTRACE_H |
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1948 // --------------------------------------------------------------------------- |
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1949 // Generate a dtrace nmethod for a given signature. The method takes arguments |
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1950 // in the Java compiled code convention, marshals them to the native |
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1951 // abi and then leaves nops at the position you would expect to call a native |
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1952 // function. When the probe is enabled the nops are replaced with a trap |
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1953 // instruction that dtrace inserts and the trace will cause a notification |
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1954 // to dtrace. |
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1955 // |
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1956 // The probes are only able to take primitive types and java/lang/String as |
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1957 // arguments. No other java types are allowed. Strings are converted to utf8 |
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1958 // strings so that from dtrace point of view java strings are converted to C |
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1959 // strings. There is an arbitrary fixed limit on the total space that a method |
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1960 // can use for converting the strings. (256 chars per string in the signature). |
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1961 // So any java string larger then this is truncated. |
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1962 |
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1963 nmethod *SharedRuntime::generate_dtrace_nmethod( |
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1964 MacroAssembler *masm, methodHandle method) { |
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1965 |
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1966 // generate_dtrace_nmethod is guarded by a mutex so we are sure to |
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1967 // be single threaded in this method. |
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1968 assert(AdapterHandlerLibrary_lock->owned_by_self(), "must be"); |
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1969 |
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1970 // Fill in the signature array, for the calling-convention call. |
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1971 int total_args_passed = method->size_of_parameters(); |
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1972 |
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1973 BasicType* in_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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1974 VMRegPair *in_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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1975 |
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1976 // The signature we are going to use for the trap that dtrace will see |
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1977 // java/lang/String is converted. We drop "this" and any other object |
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1978 // is converted to NULL. (A one-slot java/lang/Long object reference |
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1979 // is converted to a two-slot long, which is why we double the allocation). |
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1980 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed * 2); |
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1981 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed * 2); |
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1982 |
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1983 int i=0; |
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1984 int total_strings = 0; |
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1985 int first_arg_to_pass = 0; |
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1986 int total_c_args = 0; |
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1987 |
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1988 if( !method->is_static() ) { // Pass in receiver first |
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1989 in_sig_bt[i++] = T_OBJECT; |
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1990 first_arg_to_pass = 1; |
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1991 } |
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1992 |
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1993 // We need to convert the java args to where a native (non-jni) function |
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1994 // would expect them. To figure out where they go we convert the java |
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1995 // signature to a C signature. |
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1996 |
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1997 SignatureStream ss(method->signature()); |
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1998 for ( ; !ss.at_return_type(); ss.next()) { |
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1999 BasicType bt = ss.type(); |
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2000 in_sig_bt[i++] = bt; // Collect remaining bits of signature |
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2001 out_sig_bt[total_c_args++] = bt; |
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2002 if( bt == T_OBJECT) { |
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2003 symbolOop s = ss.as_symbol_or_null(); |
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2004 if (s == vmSymbols::java_lang_String()) { |
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2005 total_strings++; |
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2006 out_sig_bt[total_c_args-1] = T_ADDRESS; |
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2007 } else if (s == vmSymbols::java_lang_Boolean() || |
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2008 s == vmSymbols::java_lang_Character() || |
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2009 s == vmSymbols::java_lang_Byte() || |
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2010 s == vmSymbols::java_lang_Short() || |
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2011 s == vmSymbols::java_lang_Integer() || |
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2012 s == vmSymbols::java_lang_Float()) { |
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2013 out_sig_bt[total_c_args-1] = T_INT; |
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2014 } else if (s == vmSymbols::java_lang_Long() || |
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2015 s == vmSymbols::java_lang_Double()) { |
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2016 out_sig_bt[total_c_args-1] = T_LONG; |
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2017 out_sig_bt[total_c_args++] = T_VOID; |
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2018 } |
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2019 } else if ( bt == T_LONG || bt == T_DOUBLE ) { |
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2020 in_sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2021 out_sig_bt[total_c_args++] = T_VOID; |
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2022 } |
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2023 } |
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2024 |
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2025 assert(i==total_args_passed, "validly parsed signature"); |
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2026 |
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2027 // Now get the compiled-Java layout as input arguments |
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2028 int comp_args_on_stack; |
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2029 comp_args_on_stack = SharedRuntime::java_calling_convention( |
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2030 in_sig_bt, in_regs, total_args_passed, false); |
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2031 |
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2032 // Now figure out where the args must be stored and how much stack space |
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2033 // they require (neglecting out_preserve_stack_slots). |
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2034 |
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2035 int out_arg_slots; |
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2036 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); |
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2037 |
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2038 // Calculate the total number of stack slots we will need. |
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2039 |
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2040 // First count the abi requirement plus all of the outgoing args |
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2041 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; |
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2042 |
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2043 // Now space for the string(s) we must convert |
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2044 |
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2045 int* string_locs = NEW_RESOURCE_ARRAY(int, total_strings + 1); |
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2046 for (i = 0; i < total_strings ; i++) { |
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2047 string_locs[i] = stack_slots; |
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2048 stack_slots += max_dtrace_string_size / VMRegImpl::stack_slot_size; |
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2049 } |
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2050 |
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2051 // + 2 for return address (which we own) and saved rbp, |
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2052 |
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2053 stack_slots += 2; |
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2054 |
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2055 // Ok The space we have allocated will look like: |
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2056 // |
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2057 // |
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2058 // FP-> | | |
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2059 // |---------------------| |
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2060 // | string[n] | |
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2061 // |---------------------| <- string_locs[n] |
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2062 // | string[n-1] | |
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2063 // |---------------------| <- string_locs[n-1] |
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2064 // | ... | |
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2065 // | ... | |
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2066 // |---------------------| <- string_locs[1] |
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2067 // | string[0] | |
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2068 // |---------------------| <- string_locs[0] |
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2069 // | outbound memory | |
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2070 // | based arguments | |
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2071 // | | |
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2072 // |---------------------| |
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2073 // | | |
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2074 // SP-> | out_preserved_slots | |
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2075 // |
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2076 // |
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2077 |
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2078 // Now compute actual number of stack words we need rounding to make |
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2079 // stack properly aligned. |
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2080 stack_slots = round_to(stack_slots, 2 * VMRegImpl::slots_per_word); |
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2081 |
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2082 int stack_size = stack_slots * VMRegImpl::stack_slot_size; |
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2083 |
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2084 intptr_t start = (intptr_t)__ pc(); |
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2085 |
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2086 // First thing make an ic check to see if we should even be here |
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2087 |
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2088 // We are free to use all registers as temps without saving them and |
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2089 // restoring them except rbp. rbp, is the only callee save register |
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2090 // as far as the interpreter and the compiler(s) are concerned. |
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2091 |
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2092 const Register ic_reg = rax; |
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2093 const Register receiver = rcx; |
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2094 Label hit; |
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2095 Label exception_pending; |
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2096 |
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2097 |
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2098 __ verify_oop(receiver); |
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2099 __ cmpl(ic_reg, Address(receiver, oopDesc::klass_offset_in_bytes())); |
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2100 __ jcc(Assembler::equal, hit); |
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2101 |
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2102 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); |
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2103 |
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2104 // verified entry must be aligned for code patching. |
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2105 // and the first 5 bytes must be in the same cache line |
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2106 // if we align at 8 then we will be sure 5 bytes are in the same line |
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2107 __ align(8); |
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2108 |
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2109 __ bind(hit); |
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2110 |
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2111 int vep_offset = ((intptr_t)__ pc()) - start; |
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2112 |
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2113 |
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2114 // The instruction at the verified entry point must be 5 bytes or longer |
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2115 // because it can be patched on the fly by make_non_entrant. The stack bang |
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2116 // instruction fits that requirement. |
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2117 |
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2118 // Generate stack overflow check |
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2119 |
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2120 |
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2121 if (UseStackBanging) { |
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2122 if (stack_size <= StackShadowPages*os::vm_page_size()) { |
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2123 __ bang_stack_with_offset(StackShadowPages*os::vm_page_size()); |
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2124 } else { |
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2125 __ movl(rax, stack_size); |
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2126 __ bang_stack_size(rax, rbx); |
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2127 } |
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2128 } else { |
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2129 // need a 5 byte instruction to allow MT safe patching to non-entrant |
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2130 __ fat_nop(); |
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2131 } |
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2132 |
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2133 assert(((int)__ pc() - start - vep_offset) >= 5, |
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2134 "valid size for make_non_entrant"); |
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2135 |
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2136 // Generate a new frame for the wrapper. |
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2137 __ enter(); |
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2138 |
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2139 // -2 because return address is already present and so is saved rbp, |
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2140 if (stack_size - 2*wordSize != 0) { |
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2141 __ subl(rsp, stack_size - 2*wordSize); |
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2142 } |
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2143 |
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2144 // Frame is now completed as far a size and linkage. |
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2145 |
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2146 int frame_complete = ((intptr_t)__ pc()) - start; |
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2147 |
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2148 // First thing we do store all the args as if we are doing the call. |
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2149 // Since the C calling convention is stack based that ensures that |
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2150 // all the Java register args are stored before we need to convert any |
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2151 // string we might have. |
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2152 |
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2153 int sid = 0; |
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2154 int c_arg, j_arg; |
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2155 int string_reg = 0; |
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2156 |
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2157 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2158 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2159 |
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2160 VMRegPair src = in_regs[j_arg]; |
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2161 VMRegPair dst = out_regs[c_arg]; |
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2162 assert(dst.first()->is_stack() || in_sig_bt[j_arg] == T_VOID, |
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2163 "stack based abi assumed"); |
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2164 |
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2165 switch (in_sig_bt[j_arg]) { |
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2166 |
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2167 case T_ARRAY: |
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2168 case T_OBJECT: |
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2169 if (out_sig_bt[c_arg] == T_ADDRESS) { |
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2170 // Any register based arg for a java string after the first |
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2171 // will be destroyed by the call to get_utf so we store |
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2172 // the original value in the location the utf string address |
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2173 // will eventually be stored. |
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2174 if (src.first()->is_reg()) { |
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2175 if (string_reg++ != 0) { |
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2176 simple_move32(masm, src, dst); |
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2177 } |
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2178 } |
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2179 } else if (out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
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2180 // need to unbox a one-word value |
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2181 Register in_reg = rax; |
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2182 if ( src.first()->is_reg() ) { |
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2183 in_reg = src.first()->as_Register(); |
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2184 } else { |
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|
2185 simple_move32(masm, src, in_reg->as_VMReg()); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2186 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2187 Label skipUnbox; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2188 __ movl(Address(rsp, reg2offset_out(dst.first())), NULL_WORD); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2189 if ( out_sig_bt[c_arg] == T_LONG ) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2190 __ movl(Address(rsp, reg2offset_out(dst.second())), NULL_WORD); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2191 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2192 __ testl(in_reg, in_reg); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2193 __ jcc(Assembler::zero, skipUnbox); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2194 assert(dst.first()->is_stack() && |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2195 (!dst.second()->is_valid() || dst.second()->is_stack()), |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
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|
2196 "value(s) must go into stack slots"); |
165
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
116
diff
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|
2197 |
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
116
diff
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|
2198 BasicType bt = out_sig_bt[c_arg]; |
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
116
diff
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|
2199 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
kvn
parents:
116
diff
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|
2200 if ( bt == T_LONG ) { |
116
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2201 __ movl(rbx, Address(in_reg, |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2202 box_offset + VMRegImpl::stack_slot_size)); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2203 __ movl(Address(rsp, reg2offset_out(dst.second())), rbx); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2204 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2205 __ movl(in_reg, Address(in_reg, box_offset)); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2206 __ movl(Address(rsp, reg2offset_out(dst.first())), in_reg); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
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|
2207 __ bind(skipUnbox); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2208 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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0
diff
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|
2209 // Convert the arg to NULL |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2210 __ movl(Address(rsp, reg2offset_out(dst.first())), NULL_WORD); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2211 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
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|
2212 if (out_sig_bt[c_arg] == T_LONG) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
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|
2213 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2214 ++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
|
2215 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2216 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2217 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
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|
2218 case T_VOID: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2219 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2220 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2221 case T_FLOAT: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2222 float_move(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2223 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2224 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2225 case T_DOUBLE: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2226 assert( j_arg + 1 < total_args_passed && |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2227 in_sig_bt[j_arg + 1] == T_VOID, "bad arg list"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2228 double_move(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2229 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2230 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2231 case T_LONG : |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2232 long_move(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2233 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2234 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2235 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2236 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2237 default: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2238 simple_move32(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2239 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2240 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2241 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2242 // Now we must convert any string we have to utf8 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2243 // |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2244 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2245 for (sid = 0, j_arg = first_arg_to_pass, c_arg = 0 ; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2246 sid < total_strings ; j_arg++, c_arg++ ) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2247 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2248 if (out_sig_bt[c_arg] == T_ADDRESS) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2249 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2250 Address utf8_addr = Address( |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2251 rsp, string_locs[sid++] * VMRegImpl::stack_slot_size); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2252 __ leal(rax, utf8_addr); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2253 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2254 // The first string we find might still be in the original java arg |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2255 // register |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2256 VMReg orig_loc = in_regs[j_arg].first(); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2257 Register string_oop; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2258 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2259 // This is where the argument will eventually reside |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2260 Address dest = Address(rsp, reg2offset_out(out_regs[c_arg].first())); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2261 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2262 if (sid == 1 && orig_loc->is_reg()) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2263 string_oop = orig_loc->as_Register(); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2264 assert(string_oop != rax, "smashed arg"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2265 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2266 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2267 if (orig_loc->is_reg()) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2268 // Get the copy of the jls object |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2269 __ movl(rcx, dest); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2270 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2271 // arg is still in the original location |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2272 __ movl(rcx, Address(rbp, reg2offset_in(orig_loc))); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2273 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2274 string_oop = rcx; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2275 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2276 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2277 Label nullString; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2278 __ movl(dest, NULL_WORD); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2279 __ testl(string_oop, string_oop); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2280 __ jcc(Assembler::zero, nullString); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2281 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2282 // Now we can store the address of the utf string as the argument |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2283 __ movl(dest, rax); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2284 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2285 // And do the conversion |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2286 __ call_VM_leaf(CAST_FROM_FN_PTR( |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2287 address, SharedRuntime::get_utf), string_oop, rax); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2288 __ bind(nullString); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2289 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2290 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2291 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
parents:
0
diff
changeset
|
2292 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2293 ++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
|
2294 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2295 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2296 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2297 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2298 // 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
changeset
|
2299 // patch in the trap |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2300 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2301 int patch_offset = ((intptr_t)__ pc()) - start; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2302 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2303 __ nop(); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2304 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
0
diff
changeset
|
2305 |
018d5b58dd4f
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2306 // Return |
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2307 |
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2308 __ leave(); |
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2309 __ ret(0); |
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2310 |
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2311 __ flush(); |
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2312 |
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2313 nmethod *nm = nmethod::new_dtrace_nmethod( |
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2314 method, masm->code(), vep_offset, patch_offset, frame_complete, |
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2315 stack_slots / VMRegImpl::slots_per_word); |
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2316 return nm; |
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2317 |
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2318 } |
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2319 |
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2320 #endif // HAVE_DTRACE_H |
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2321 |
0 | 2322 // this function returns the adjust size (in number of words) to a c2i adapter |
2323 // activation for use during deoptimization | |
2324 int Deoptimization::last_frame_adjust(int callee_parameters, int callee_locals ) { | |
2325 return (callee_locals - callee_parameters) * Interpreter::stackElementWords(); | |
2326 } | |
2327 | |
2328 | |
2329 uint SharedRuntime::out_preserve_stack_slots() { | |
2330 return 0; | |
2331 } | |
2332 | |
2333 | |
2334 //------------------------------generate_deopt_blob---------------------------- | |
2335 void SharedRuntime::generate_deopt_blob() { | |
2336 // allocate space for the code | |
2337 ResourceMark rm; | |
2338 // setup code generation tools | |
2339 CodeBuffer buffer("deopt_blob", 1024, 1024); | |
2340 MacroAssembler* masm = new MacroAssembler(&buffer); | |
2341 int frame_size_in_words; | |
2342 OopMap* map = NULL; | |
2343 // Account for the extra args we place on the stack | |
2344 // by the time we call fetch_unroll_info | |
2345 const int additional_words = 2; // deopt kind, thread | |
2346 | |
2347 OopMapSet *oop_maps = new OopMapSet(); | |
2348 | |
2349 // ------------- | |
2350 // This code enters when returning to a de-optimized nmethod. A return | |
2351 // address has been pushed on the the stack, and return values are in | |
2352 // registers. | |
2353 // If we are doing a normal deopt then we were called from the patched | |
2354 // nmethod from the point we returned to the nmethod. So the return | |
2355 // address on the stack is wrong by NativeCall::instruction_size | |
2356 // We will adjust the value to it looks like we have the original return | |
2357 // address on the stack (like when we eagerly deoptimized). | |
2358 // In the case of an exception pending with deoptimized then we enter | |
2359 // with a return address on the stack that points after the call we patched | |
2360 // into the exception handler. We have the following register state: | |
2361 // rax,: exception | |
2362 // rbx,: exception handler | |
2363 // rdx: throwing pc | |
2364 // So in this case we simply jam rdx into the useless return address and | |
2365 // the stack looks just like we want. | |
2366 // | |
2367 // At this point we need to de-opt. We save the argument return | |
2368 // registers. We call the first C routine, fetch_unroll_info(). This | |
2369 // routine captures the return values and returns a structure which | |
2370 // describes the current frame size and the sizes of all replacement frames. | |
2371 // The current frame is compiled code and may contain many inlined | |
2372 // functions, each with their own JVM state. We pop the current frame, then | |
2373 // push all the new frames. Then we call the C routine unpack_frames() to | |
2374 // populate these frames. Finally unpack_frames() returns us the new target | |
2375 // address. Notice that callee-save registers are BLOWN here; they have | |
2376 // already been captured in the vframeArray at the time the return PC was | |
2377 // patched. | |
2378 address start = __ pc(); | |
2379 Label cont; | |
2380 | |
2381 // Prolog for non exception case! | |
2382 | |
2383 // Save everything in sight. | |
2384 | |
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2385 map = RegisterSaver::save_live_registers(masm, additional_words, &frame_size_in_words, false); |
0 | 2386 // Normal deoptimization |
304 | 2387 __ push(Deoptimization::Unpack_deopt); |
0 | 2388 __ jmp(cont); |
2389 | |
2390 int reexecute_offset = __ pc() - start; | |
2391 | |
2392 // Reexecute case | |
2393 // return address is the pc describes what bci to do re-execute at | |
2394 | |
2395 // No need to update map as each call to save_live_registers will produce identical oopmap | |
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2396 (void) RegisterSaver::save_live_registers(masm, additional_words, &frame_size_in_words, false); |
0 | 2397 |
304 | 2398 __ push(Deoptimization::Unpack_reexecute); |
0 | 2399 __ jmp(cont); |
2400 | |
2401 int exception_offset = __ pc() - start; | |
2402 | |
2403 // Prolog for exception case | |
2404 | |
2405 // all registers are dead at this entry point, except for rax, and | |
2406 // rdx which contain the exception oop and exception pc | |
2407 // respectively. Set them in TLS and fall thru to the | |
2408 // unpack_with_exception_in_tls entry point. | |
2409 | |
2410 __ get_thread(rdi); | |
304 | 2411 __ movptr(Address(rdi, JavaThread::exception_pc_offset()), rdx); |
2412 __ movptr(Address(rdi, JavaThread::exception_oop_offset()), rax); | |
0 | 2413 |
2414 int exception_in_tls_offset = __ pc() - start; | |
2415 | |
2416 // new implementation because exception oop is now passed in JavaThread | |
2417 | |
2418 // Prolog for exception case | |
2419 // All registers must be preserved because they might be used by LinearScan | |
2420 // Exceptiop oop and throwing PC are passed in JavaThread | |
2421 // tos: stack at point of call to method that threw the exception (i.e. only | |
2422 // args are on the stack, no return address) | |
2423 | |
2424 // make room on stack for the return address | |
2425 // It will be patched later with the throwing pc. The correct value is not | |
2426 // available now because loading it from memory would destroy registers. | |
304 | 2427 __ push(0); |
0 | 2428 |
2429 // Save everything in sight. | |
2430 | |
2431 // No need to update map as each call to save_live_registers will produce identical oopmap | |
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2432 (void) RegisterSaver::save_live_registers(masm, additional_words, &frame_size_in_words, false); |
0 | 2433 |
2434 // Now it is safe to overwrite any register | |
2435 | |
2436 // store the correct deoptimization type | |
304 | 2437 __ push(Deoptimization::Unpack_exception); |
0 | 2438 |
2439 // load throwing pc from JavaThread and patch it as the return address | |
2440 // of the current frame. Then clear the field in JavaThread | |
2441 __ get_thread(rdi); | |
304 | 2442 __ movptr(rdx, Address(rdi, JavaThread::exception_pc_offset())); |
2443 __ movptr(Address(rbp, wordSize), rdx); | |
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2444 __ movptr(Address(rdi, JavaThread::exception_pc_offset()), NULL_WORD); |
0 | 2445 |
2446 #ifdef ASSERT | |
2447 // verify that there is really an exception oop in JavaThread | |
304 | 2448 __ movptr(rax, Address(rdi, JavaThread::exception_oop_offset())); |
0 | 2449 __ verify_oop(rax); |
2450 | |
2451 // verify that there is no pending exception | |
2452 Label no_pending_exception; | |
304 | 2453 __ movptr(rax, Address(rdi, Thread::pending_exception_offset())); |
2454 __ testptr(rax, rax); | |
0 | 2455 __ jcc(Assembler::zero, no_pending_exception); |
2456 __ stop("must not have pending exception here"); | |
2457 __ bind(no_pending_exception); | |
2458 #endif | |
2459 | |
2460 __ bind(cont); | |
2461 | |
2462 // Compiled code leaves the floating point stack dirty, empty it. | |
2463 __ empty_FPU_stack(); | |
2464 | |
2465 | |
2466 // Call C code. Need thread and this frame, but NOT official VM entry | |
2467 // crud. We cannot block on this call, no GC can happen. | |
2468 __ get_thread(rcx); | |
304 | 2469 __ push(rcx); |
0 | 2470 // fetch_unroll_info needs to call last_java_frame() |
2471 __ set_last_Java_frame(rcx, noreg, noreg, NULL); | |
2472 | |
2473 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::fetch_unroll_info))); | |
2474 | |
2475 // Need to have an oopmap that tells fetch_unroll_info where to | |
2476 // find any register it might need. | |
2477 | |
2478 oop_maps->add_gc_map( __ pc()-start, map); | |
2479 | |
2480 // Discard arg to fetch_unroll_info | |
304 | 2481 __ pop(rcx); |
0 | 2482 |
2483 __ get_thread(rcx); | |
2484 __ reset_last_Java_frame(rcx, false, false); | |
2485 | |
2486 // Load UnrollBlock into EDI | |
304 | 2487 __ mov(rdi, rax); |
0 | 2488 |
2489 // Move the unpack kind to a safe place in the UnrollBlock because | |
2490 // we are very short of registers | |
2491 | |
2492 Address unpack_kind(rdi, Deoptimization::UnrollBlock::unpack_kind_offset_in_bytes()); | |
2493 // retrieve the deopt kind from where we left it. | |
304 | 2494 __ pop(rax); |
0 | 2495 __ movl(unpack_kind, rax); // save the unpack_kind value |
2496 | |
2497 Label noException; | |
2498 __ cmpl(rax, Deoptimization::Unpack_exception); // Was exception pending? | |
2499 __ jcc(Assembler::notEqual, noException); | |
304 | 2500 __ movptr(rax, Address(rcx, JavaThread::exception_oop_offset())); |
2501 __ movptr(rdx, Address(rcx, JavaThread::exception_pc_offset())); | |
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2502 __ movptr(Address(rcx, JavaThread::exception_oop_offset()), NULL_WORD); |
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2503 __ movptr(Address(rcx, JavaThread::exception_pc_offset()), NULL_WORD); |
0 | 2504 |
2505 __ verify_oop(rax); | |
2506 | |
2507 // Overwrite the result registers with the exception results. | |
304 | 2508 __ movptr(Address(rsp, RegisterSaver::raxOffset()*wordSize), rax); |
2509 __ movptr(Address(rsp, RegisterSaver::rdxOffset()*wordSize), rdx); | |
0 | 2510 |
2511 __ bind(noException); | |
2512 | |
2513 // Stack is back to only having register save data on the stack. | |
2514 // Now restore the result registers. Everything else is either dead or captured | |
2515 // in the vframeArray. | |
2516 | |
2517 RegisterSaver::restore_result_registers(masm); | |
2518 | |
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2519 // Non standard control word may be leaked out through a safepoint blob, and we can |
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2520 // deopt at a poll point with the non standard control word. However, we should make |
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2521 // sure the control word is correct after restore_result_registers. |
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2522 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); |
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2523 |
0 | 2524 // All of the register save area has been popped of the stack. Only the |
2525 // return address remains. | |
2526 | |
2527 // Pop all the frames we must move/replace. | |
2528 // | |
2529 // Frame picture (youngest to oldest) | |
2530 // 1: self-frame (no frame link) | |
2531 // 2: deopting frame (no frame link) | |
2532 // 3: caller of deopting frame (could be compiled/interpreted). | |
2533 // | |
2534 // Note: by leaving the return address of self-frame on the stack | |
2535 // and using the size of frame 2 to adjust the stack | |
2536 // when we are done the return to frame 3 will still be on the stack. | |
2537 | |
2538 // Pop deoptimized frame | |
304 | 2539 __ addptr(rsp, Address(rdi,Deoptimization::UnrollBlock::size_of_deoptimized_frame_offset_in_bytes())); |
0 | 2540 |
2541 // sp should be pointing at the return address to the caller (3) | |
2542 | |
2543 // Stack bang to make sure there's enough room for these interpreter frames. | |
2544 if (UseStackBanging) { | |
2545 __ movl(rbx, Address(rdi ,Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); | |
2546 __ bang_stack_size(rbx, rcx); | |
2547 } | |
2548 | |
2549 // Load array of frame pcs into ECX | |
304 | 2550 __ movptr(rcx,Address(rdi,Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); |
2551 | |
2552 __ pop(rsi); // trash the old pc | |
0 | 2553 |
2554 // Load array of frame sizes into ESI | |
304 | 2555 __ movptr(rsi,Address(rdi,Deoptimization::UnrollBlock::frame_sizes_offset_in_bytes())); |
0 | 2556 |
2557 Address counter(rdi, Deoptimization::UnrollBlock::counter_temp_offset_in_bytes()); | |
2558 | |
2559 __ movl(rbx, Address(rdi, Deoptimization::UnrollBlock::number_of_frames_offset_in_bytes())); | |
2560 __ movl(counter, rbx); | |
2561 | |
2562 // Pick up the initial fp we should save | |
304 | 2563 __ movptr(rbp, Address(rdi, Deoptimization::UnrollBlock::initial_fp_offset_in_bytes())); |
0 | 2564 |
2565 // Now adjust the caller's stack to make up for the extra locals | |
2566 // but record the original sp so that we can save it in the skeletal interpreter | |
2567 // frame and the stack walking of interpreter_sender will get the unextended sp | |
2568 // value and not the "real" sp value. | |
2569 | |
2570 Address sp_temp(rdi, Deoptimization::UnrollBlock::sender_sp_temp_offset_in_bytes()); | |
304 | 2571 __ movptr(sp_temp, rsp); |
2572 __ movl2ptr(rbx, Address(rdi, Deoptimization::UnrollBlock::caller_adjustment_offset_in_bytes())); | |
2573 __ subptr(rsp, rbx); | |
0 | 2574 |
2575 // Push interpreter frames in a loop | |
2576 Label loop; | |
2577 __ bind(loop); | |
304 | 2578 __ movptr(rbx, Address(rsi, 0)); // Load frame size |
0 | 2579 #ifdef CC_INTERP |
304 | 2580 __ subptr(rbx, 4*wordSize); // we'll push pc and ebp by hand and |
0 | 2581 #ifdef ASSERT |
304 | 2582 __ push(0xDEADDEAD); // Make a recognizable pattern |
2583 __ push(0xDEADDEAD); | |
0 | 2584 #else /* ASSERT */ |
304 | 2585 __ subptr(rsp, 2*wordSize); // skip the "static long no_param" |
0 | 2586 #endif /* ASSERT */ |
2587 #else /* CC_INTERP */ | |
304 | 2588 __ subptr(rbx, 2*wordSize); // we'll push pc and rbp, by hand |
0 | 2589 #endif /* CC_INTERP */ |
304 | 2590 __ pushptr(Address(rcx, 0)); // save return address |
0 | 2591 __ enter(); // save old & set new rbp, |
304 | 2592 __ subptr(rsp, rbx); // Prolog! |
2593 __ movptr(rbx, sp_temp); // sender's sp | |
0 | 2594 #ifdef CC_INTERP |
304 | 2595 __ movptr(Address(rbp, |
0 | 2596 -(sizeof(BytecodeInterpreter)) + in_bytes(byte_offset_of(BytecodeInterpreter, _sender_sp))), |
2597 rbx); // Make it walkable | |
2598 #else /* CC_INTERP */ | |
2599 // This value is corrected by layout_activation_impl | |
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2600 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); |
304 | 2601 __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), rbx); // Make it walkable |
0 | 2602 #endif /* CC_INTERP */ |
304 | 2603 __ movptr(sp_temp, rsp); // pass to next frame |
2604 __ addptr(rsi, wordSize); // Bump array pointer (sizes) | |
2605 __ addptr(rcx, wordSize); // Bump array pointer (pcs) | |
2606 __ decrementl(counter); // decrement counter | |
0 | 2607 __ jcc(Assembler::notZero, loop); |
304 | 2608 __ pushptr(Address(rcx, 0)); // save final return address |
0 | 2609 |
2610 // Re-push self-frame | |
2611 __ enter(); // save old & set new rbp, | |
2612 | |
2613 // Return address and rbp, are in place | |
2614 // We'll push additional args later. Just allocate a full sized | |
2615 // register save area | |
304 | 2616 __ subptr(rsp, (frame_size_in_words-additional_words - 2) * wordSize); |
0 | 2617 |
2618 // Restore frame locals after moving the frame | |
304 | 2619 __ movptr(Address(rsp, RegisterSaver::raxOffset()*wordSize), rax); |
2620 __ movptr(Address(rsp, RegisterSaver::rdxOffset()*wordSize), rdx); | |
0 | 2621 __ fstp_d(Address(rsp, RegisterSaver::fpResultOffset()*wordSize)); // Pop float stack and store in local |
2622 if( UseSSE>=2 ) __ movdbl(Address(rsp, RegisterSaver::xmm0Offset()*wordSize), xmm0); | |
2623 if( UseSSE==1 ) __ movflt(Address(rsp, RegisterSaver::xmm0Offset()*wordSize), xmm0); | |
2624 | |
2625 // Set up the args to unpack_frame | |
2626 | |
2627 __ pushl(unpack_kind); // get the unpack_kind value | |
2628 __ get_thread(rcx); | |
304 | 2629 __ push(rcx); |
0 | 2630 |
2631 // set last_Java_sp, last_Java_fp | |
2632 __ set_last_Java_frame(rcx, noreg, rbp, NULL); | |
2633 | |
2634 // Call C code. Need thread but NOT official VM entry | |
2635 // crud. We cannot block on this call, no GC can happen. Call should | |
2636 // restore return values to their stack-slots with the new SP. | |
2637 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); | |
2638 // Set an oopmap for the call site | |
2639 oop_maps->add_gc_map( __ pc()-start, new OopMap( frame_size_in_words, 0 )); | |
2640 | |
2641 // rax, contains the return result type | |
304 | 2642 __ push(rax); |
0 | 2643 |
2644 __ get_thread(rcx); | |
2645 __ reset_last_Java_frame(rcx, false, false); | |
2646 | |
2647 // Collect return values | |
304 | 2648 __ movptr(rax,Address(rsp, (RegisterSaver::raxOffset() + additional_words + 1)*wordSize)); |
2649 __ movptr(rdx,Address(rsp, (RegisterSaver::rdxOffset() + additional_words + 1)*wordSize)); | |
0 | 2650 |
2651 // Clear floating point stack before returning to interpreter | |
2652 __ empty_FPU_stack(); | |
2653 | |
2654 // Check if we should push the float or double return value. | |
2655 Label results_done, yes_double_value; | |
2656 __ cmpl(Address(rsp, 0), T_DOUBLE); | |
2657 __ jcc (Assembler::zero, yes_double_value); | |
2658 __ cmpl(Address(rsp, 0), T_FLOAT); | |
2659 __ jcc (Assembler::notZero, results_done); | |
2660 | |
2661 // return float value as expected by interpreter | |
2662 if( UseSSE>=1 ) __ movflt(xmm0, Address(rsp, (RegisterSaver::xmm0Offset() + additional_words + 1)*wordSize)); | |
2663 else __ fld_d(Address(rsp, (RegisterSaver::fpResultOffset() + additional_words + 1)*wordSize)); | |
2664 __ jmp(results_done); | |
2665 | |
2666 // return double value as expected by interpreter | |
2667 __ bind(yes_double_value); | |
2668 if( UseSSE>=2 ) __ movdbl(xmm0, Address(rsp, (RegisterSaver::xmm0Offset() + additional_words + 1)*wordSize)); | |
2669 else __ fld_d(Address(rsp, (RegisterSaver::fpResultOffset() + additional_words + 1)*wordSize)); | |
2670 | |
2671 __ bind(results_done); | |
2672 | |
2673 // Pop self-frame. | |
2674 __ leave(); // Epilog! | |
2675 | |
2676 // Jump to interpreter | |
2677 __ ret(0); | |
2678 | |
2679 // ------------- | |
2680 // make sure all code is generated | |
2681 masm->flush(); | |
2682 | |
2683 _deopt_blob = DeoptimizationBlob::create( &buffer, oop_maps, 0, exception_offset, reexecute_offset, frame_size_in_words); | |
2684 _deopt_blob->set_unpack_with_exception_in_tls_offset(exception_in_tls_offset); | |
2685 } | |
2686 | |
2687 | |
2688 #ifdef COMPILER2 | |
2689 //------------------------------generate_uncommon_trap_blob-------------------- | |
2690 void SharedRuntime::generate_uncommon_trap_blob() { | |
2691 // allocate space for the code | |
2692 ResourceMark rm; | |
2693 // setup code generation tools | |
2694 CodeBuffer buffer("uncommon_trap_blob", 512, 512); | |
2695 MacroAssembler* masm = new MacroAssembler(&buffer); | |
2696 | |
2697 enum frame_layout { | |
2698 arg0_off, // thread sp + 0 // Arg location for | |
2699 arg1_off, // unloaded_class_index sp + 1 // calling C | |
2700 // The frame sender code expects that rbp will be in the "natural" place and | |
2701 // will override any oopMap setting for it. We must therefore force the layout | |
2702 // so that it agrees with the frame sender code. | |
2703 rbp_off, // callee saved register sp + 2 | |
2704 return_off, // slot for return address sp + 3 | |
2705 framesize | |
2706 }; | |
2707 | |
2708 address start = __ pc(); | |
2709 // Push self-frame. | |
304 | 2710 __ subptr(rsp, return_off*wordSize); // Epilog! |
0 | 2711 |
2712 // rbp, is an implicitly saved callee saved register (i.e. the calling | |
2713 // convention will save restore it in prolog/epilog) Other than that | |
2714 // there are no callee save registers no that adapter frames are gone. | |
304 | 2715 __ movptr(Address(rsp, rbp_off*wordSize), rbp); |
0 | 2716 |
2717 // Clear the floating point exception stack | |
2718 __ empty_FPU_stack(); | |
2719 | |
2720 // set last_Java_sp | |
2721 __ get_thread(rdx); | |
2722 __ set_last_Java_frame(rdx, noreg, noreg, NULL); | |
2723 | |
2724 // Call C code. Need thread but NOT official VM entry | |
2725 // crud. We cannot block on this call, no GC can happen. Call should | |
2726 // capture callee-saved registers as well as return values. | |
304 | 2727 __ movptr(Address(rsp, arg0_off*wordSize), rdx); |
0 | 2728 // argument already in ECX |
2729 __ movl(Address(rsp, arg1_off*wordSize),rcx); | |
2730 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap))); | |
2731 | |
2732 // Set an oopmap for the call site | |
2733 OopMapSet *oop_maps = new OopMapSet(); | |
2734 OopMap* map = new OopMap( framesize, 0 ); | |
2735 // No oopMap for rbp, it is known implicitly | |
2736 | |
2737 oop_maps->add_gc_map( __ pc()-start, map); | |
2738 | |
2739 __ get_thread(rcx); | |
2740 | |
2741 __ reset_last_Java_frame(rcx, false, false); | |
2742 | |
2743 // Load UnrollBlock into EDI | |
304 | 2744 __ movptr(rdi, rax); |
0 | 2745 |
2746 // Pop all the frames we must move/replace. | |
2747 // | |
2748 // Frame picture (youngest to oldest) | |
2749 // 1: self-frame (no frame link) | |
2750 // 2: deopting frame (no frame link) | |
2751 // 3: caller of deopting frame (could be compiled/interpreted). | |
2752 | |
2753 // Pop self-frame. We have no frame, and must rely only on EAX and ESP. | |
304 | 2754 __ addptr(rsp,(framesize-1)*wordSize); // Epilog! |
0 | 2755 |
2756 // Pop deoptimized frame | |
304 | 2757 __ movl2ptr(rcx, Address(rdi,Deoptimization::UnrollBlock::size_of_deoptimized_frame_offset_in_bytes())); |
2758 __ addptr(rsp, rcx); | |
0 | 2759 |
2760 // sp should be pointing at the return address to the caller (3) | |
2761 | |
2762 // Stack bang to make sure there's enough room for these interpreter frames. | |
2763 if (UseStackBanging) { | |
2764 __ movl(rbx, Address(rdi ,Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); | |
2765 __ bang_stack_size(rbx, rcx); | |
2766 } | |
2767 | |
2768 | |
2769 // Load array of frame pcs into ECX | |
2770 __ movl(rcx,Address(rdi,Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); | |
2771 | |
304 | 2772 __ pop(rsi); // trash the pc |
0 | 2773 |
2774 // Load array of frame sizes into ESI | |
304 | 2775 __ movptr(rsi,Address(rdi,Deoptimization::UnrollBlock::frame_sizes_offset_in_bytes())); |
0 | 2776 |
2777 Address counter(rdi, Deoptimization::UnrollBlock::counter_temp_offset_in_bytes()); | |
2778 | |
2779 __ movl(rbx, Address(rdi, Deoptimization::UnrollBlock::number_of_frames_offset_in_bytes())); | |
2780 __ movl(counter, rbx); | |
2781 | |
2782 // Pick up the initial fp we should save | |
304 | 2783 __ movptr(rbp, Address(rdi, Deoptimization::UnrollBlock::initial_fp_offset_in_bytes())); |
0 | 2784 |
2785 // Now adjust the caller's stack to make up for the extra locals | |
2786 // but record the original sp so that we can save it in the skeletal interpreter | |
2787 // frame and the stack walking of interpreter_sender will get the unextended sp | |
2788 // value and not the "real" sp value. | |
2789 | |
2790 Address sp_temp(rdi, Deoptimization::UnrollBlock::sender_sp_temp_offset_in_bytes()); | |
304 | 2791 __ movptr(sp_temp, rsp); |
2792 __ movl(rbx, Address(rdi, Deoptimization::UnrollBlock::caller_adjustment_offset_in_bytes())); | |
2793 __ subptr(rsp, rbx); | |
0 | 2794 |
2795 // Push interpreter frames in a loop | |
2796 Label loop; | |
2797 __ bind(loop); | |
304 | 2798 __ movptr(rbx, Address(rsi, 0)); // Load frame size |
0 | 2799 #ifdef CC_INTERP |
304 | 2800 __ subptr(rbx, 4*wordSize); // we'll push pc and ebp by hand and |
0 | 2801 #ifdef ASSERT |
304 | 2802 __ push(0xDEADDEAD); // Make a recognizable pattern |
2803 __ push(0xDEADDEAD); // (parm to RecursiveInterpreter...) | |
0 | 2804 #else /* ASSERT */ |
304 | 2805 __ subptr(rsp, 2*wordSize); // skip the "static long no_param" |
0 | 2806 #endif /* ASSERT */ |
2807 #else /* CC_INTERP */ | |
304 | 2808 __ subptr(rbx, 2*wordSize); // we'll push pc and rbp, by hand |
0 | 2809 #endif /* CC_INTERP */ |
304 | 2810 __ pushptr(Address(rcx, 0)); // save return address |
0 | 2811 __ enter(); // save old & set new rbp, |
304 | 2812 __ subptr(rsp, rbx); // Prolog! |
2813 __ movptr(rbx, sp_temp); // sender's sp | |
0 | 2814 #ifdef CC_INTERP |
304 | 2815 __ movptr(Address(rbp, |
0 | 2816 -(sizeof(BytecodeInterpreter)) + in_bytes(byte_offset_of(BytecodeInterpreter, _sender_sp))), |
2817 rbx); // Make it walkable | |
2818 #else /* CC_INTERP */ | |
2819 // This value is corrected by layout_activation_impl | |
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2820 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD ); |
304 | 2821 __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), rbx); // Make it walkable |
0 | 2822 #endif /* CC_INTERP */ |
304 | 2823 __ movptr(sp_temp, rsp); // pass to next frame |
2824 __ addptr(rsi, wordSize); // Bump array pointer (sizes) | |
2825 __ addptr(rcx, wordSize); // Bump array pointer (pcs) | |
2826 __ decrementl(counter); // decrement counter | |
0 | 2827 __ jcc(Assembler::notZero, loop); |
304 | 2828 __ pushptr(Address(rcx, 0)); // save final return address |
0 | 2829 |
2830 // Re-push self-frame | |
2831 __ enter(); // save old & set new rbp, | |
304 | 2832 __ subptr(rsp, (framesize-2) * wordSize); // Prolog! |
0 | 2833 |
2834 | |
2835 // set last_Java_sp, last_Java_fp | |
2836 __ get_thread(rdi); | |
2837 __ set_last_Java_frame(rdi, noreg, rbp, NULL); | |
2838 | |
2839 // Call C code. Need thread but NOT official VM entry | |
2840 // crud. We cannot block on this call, no GC can happen. Call should | |
2841 // restore return values to their stack-slots with the new SP. | |
304 | 2842 __ movptr(Address(rsp,arg0_off*wordSize),rdi); |
0 | 2843 __ movl(Address(rsp,arg1_off*wordSize), Deoptimization::Unpack_uncommon_trap); |
2844 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); | |
2845 // Set an oopmap for the call site | |
2846 oop_maps->add_gc_map( __ pc()-start, new OopMap( framesize, 0 ) ); | |
2847 | |
2848 __ get_thread(rdi); | |
2849 __ reset_last_Java_frame(rdi, true, false); | |
2850 | |
2851 // Pop self-frame. | |
2852 __ leave(); // Epilog! | |
2853 | |
2854 // Jump to interpreter | |
2855 __ ret(0); | |
2856 | |
2857 // ------------- | |
2858 // make sure all code is generated | |
2859 masm->flush(); | |
2860 | |
2861 _uncommon_trap_blob = UncommonTrapBlob::create(&buffer, oop_maps, framesize); | |
2862 } | |
2863 #endif // COMPILER2 | |
2864 | |
2865 //------------------------------generate_handler_blob------ | |
2866 // | |
2867 // Generate a special Compile2Runtime blob that saves all registers, | |
2868 // setup oopmap, and calls safepoint code to stop the compiled code for | |
2869 // a safepoint. | |
2870 // | |
2871 static SafepointBlob* generate_handler_blob(address call_ptr, bool cause_return) { | |
2872 | |
2873 // Account for thread arg in our frame | |
2874 const int additional_words = 1; | |
2875 int frame_size_in_words; | |
2876 | |
2877 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); | |
2878 | |
2879 ResourceMark rm; | |
2880 OopMapSet *oop_maps = new OopMapSet(); | |
2881 OopMap* map; | |
2882 | |
2883 // allocate space for the code | |
2884 // setup code generation tools | |
2885 CodeBuffer buffer("handler_blob", 1024, 512); | |
2886 MacroAssembler* masm = new MacroAssembler(&buffer); | |
2887 | |
2888 const Register java_thread = rdi; // callee-saved for VC++ | |
2889 address start = __ pc(); | |
2890 address call_pc = NULL; | |
2891 | |
2892 // If cause_return is true we are at a poll_return and there is | |
2893 // the return address on the stack to the caller on the nmethod | |
2894 // that is safepoint. We can leave this return on the stack and | |
2895 // effectively complete the return and safepoint in the caller. | |
2896 // Otherwise we push space for a return address that the safepoint | |
2897 // handler will install later to make the stack walking sensible. | |
2898 if( !cause_return ) | |
304 | 2899 __ push(rbx); // Make room for return address (or push it again) |
0 | 2900 |
2901 map = RegisterSaver::save_live_registers(masm, additional_words, &frame_size_in_words, false); | |
2902 | |
2903 // The following is basically a call_VM. However, we need the precise | |
2904 // address of the call in order to generate an oopmap. Hence, we do all the | |
2905 // work ourselves. | |
2906 | |
2907 // Push thread argument and setup last_Java_sp | |
2908 __ get_thread(java_thread); | |
304 | 2909 __ push(java_thread); |
0 | 2910 __ set_last_Java_frame(java_thread, noreg, noreg, NULL); |
2911 | |
2912 // if this was not a poll_return then we need to correct the return address now. | |
2913 if( !cause_return ) { | |
304 | 2914 __ movptr(rax, Address(java_thread, JavaThread::saved_exception_pc_offset())); |
2915 __ movptr(Address(rbp, wordSize), rax); | |
0 | 2916 } |
2917 | |
2918 // do the call | |
2919 __ call(RuntimeAddress(call_ptr)); | |
2920 | |
2921 // Set an oopmap for the call site. This oopmap will map all | |
2922 // oop-registers and debug-info registers as callee-saved. This | |
2923 // will allow deoptimization at this safepoint to find all possible | |
2924 // debug-info recordings, as well as let GC find all oops. | |
2925 | |
2926 oop_maps->add_gc_map( __ pc() - start, map); | |
2927 | |
2928 // Discard arg | |
304 | 2929 __ pop(rcx); |
0 | 2930 |
2931 Label noException; | |
2932 | |
2933 // Clear last_Java_sp again | |
2934 __ get_thread(java_thread); | |
2935 __ reset_last_Java_frame(java_thread, false, false); | |
2936 | |
304 | 2937 __ cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 2938 __ jcc(Assembler::equal, noException); |
2939 | |
2940 // Exception pending | |
2941 | |
2942 RegisterSaver::restore_live_registers(masm); | |
2943 | |
2944 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
2945 | |
2946 __ bind(noException); | |
2947 | |
2948 // Normal exit, register restoring and exit | |
2949 RegisterSaver::restore_live_registers(masm); | |
2950 | |
2951 __ ret(0); | |
2952 | |
2953 // make sure all code is generated | |
2954 masm->flush(); | |
2955 | |
2956 // Fill-out other meta info | |
2957 return SafepointBlob::create(&buffer, oop_maps, frame_size_in_words); | |
2958 } | |
2959 | |
2960 // | |
2961 // generate_resolve_blob - call resolution (static/virtual/opt-virtual/ic-miss | |
2962 // | |
2963 // Generate a stub that calls into vm to find out the proper destination | |
2964 // of a java call. All the argument registers are live at this point | |
2965 // but since this is generic code we don't know what they are and the caller | |
2966 // must do any gc of the args. | |
2967 // | |
2968 static RuntimeStub* generate_resolve_blob(address destination, const char* name) { | |
2969 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); | |
2970 | |
2971 // allocate space for the code | |
2972 ResourceMark rm; | |
2973 | |
2974 CodeBuffer buffer(name, 1000, 512); | |
2975 MacroAssembler* masm = new MacroAssembler(&buffer); | |
2976 | |
2977 int frame_size_words; | |
2978 enum frame_layout { | |
2979 thread_off, | |
2980 extra_words }; | |
2981 | |
2982 OopMapSet *oop_maps = new OopMapSet(); | |
2983 OopMap* map = NULL; | |
2984 | |
2985 int start = __ offset(); | |
2986 | |
2987 map = RegisterSaver::save_live_registers(masm, extra_words, &frame_size_words); | |
2988 | |
2989 int frame_complete = __ offset(); | |
2990 | |
2991 const Register thread = rdi; | |
2992 __ get_thread(rdi); | |
2993 | |
304 | 2994 __ push(thread); |
0 | 2995 __ set_last_Java_frame(thread, noreg, rbp, NULL); |
2996 | |
2997 __ call(RuntimeAddress(destination)); | |
2998 | |
2999 | |
3000 // Set an oopmap for the call site. | |
3001 // We need this not only for callee-saved registers, but also for volatile | |
3002 // registers that the compiler might be keeping live across a safepoint. | |
3003 | |
3004 oop_maps->add_gc_map( __ offset() - start, map); | |
3005 | |
3006 // rax, contains the address we are going to jump to assuming no exception got installed | |
3007 | |
304 | 3008 __ addptr(rsp, wordSize); |
0 | 3009 |
3010 // clear last_Java_sp | |
3011 __ reset_last_Java_frame(thread, true, false); | |
3012 // check for pending exceptions | |
3013 Label pending; | |
304 | 3014 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 3015 __ jcc(Assembler::notEqual, pending); |
3016 | |
3017 // get the returned methodOop | |
304 | 3018 __ movptr(rbx, Address(thread, JavaThread::vm_result_offset())); |
3019 __ movptr(Address(rsp, RegisterSaver::rbx_offset() * wordSize), rbx); | |
3020 | |
3021 __ movptr(Address(rsp, RegisterSaver::rax_offset() * wordSize), rax); | |
0 | 3022 |
3023 RegisterSaver::restore_live_registers(masm); | |
3024 | |
3025 // We are back the the original state on entry and ready to go. | |
3026 | |
3027 __ jmp(rax); | |
3028 | |
3029 // Pending exception after the safepoint | |
3030 | |
3031 __ bind(pending); | |
3032 | |
3033 RegisterSaver::restore_live_registers(masm); | |
3034 | |
3035 // exception pending => remove activation and forward to exception handler | |
3036 | |
3037 __ get_thread(thread); | |
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3038 __ movptr(Address(thread, JavaThread::vm_result_offset()), NULL_WORD); |
304 | 3039 __ movptr(rax, Address(thread, Thread::pending_exception_offset())); |
0 | 3040 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
3041 | |
3042 // ------------- | |
3043 // make sure all code is generated | |
3044 masm->flush(); | |
3045 | |
3046 // return the blob | |
3047 // frame_size_words or bytes?? | |
3048 return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_words, oop_maps, true); | |
3049 } | |
3050 | |
3051 void SharedRuntime::generate_stubs() { | |
3052 | |
3053 _wrong_method_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method), | |
3054 "wrong_method_stub"); | |
3055 | |
3056 _ic_miss_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_ic_miss), | |
3057 "ic_miss_stub"); | |
3058 | |
3059 _resolve_opt_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_opt_virtual_call_C), | |
3060 "resolve_opt_virtual_call"); | |
3061 | |
3062 _resolve_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_virtual_call_C), | |
3063 "resolve_virtual_call"); | |
3064 | |
3065 _resolve_static_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_static_call_C), | |
3066 "resolve_static_call"); | |
3067 | |
3068 _polling_page_safepoint_handler_blob = | |
3069 generate_handler_blob(CAST_FROM_FN_PTR(address, | |
3070 SafepointSynchronize::handle_polling_page_exception), false); | |
3071 | |
3072 _polling_page_return_handler_blob = | |
3073 generate_handler_blob(CAST_FROM_FN_PTR(address, | |
3074 SafepointSynchronize::handle_polling_page_exception), true); | |
3075 | |
3076 generate_deopt_blob(); | |
3077 #ifdef COMPILER2 | |
3078 generate_uncommon_trap_blob(); | |
3079 #endif // COMPILER2 | |
3080 } |