Mercurial > hg > graal-compiler
annotate src/cpu/x86/vm/sharedRuntime_x86_64.cpp @ 2230:55cc33cf55bc
7018257: jmm_DumpThreads allocates into permgen
Summary: Don't allocate in permgen
Reviewed-by: ysr, sla
author | stefank |
---|---|
date | Fri, 11 Feb 2011 14:15:16 +0100 |
parents | 3582bf76420e |
children | d25d4ca69222 638119ce7cfd |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "asm/assembler.hpp" | |
27 #include "assembler_x86.inline.hpp" | |
28 #include "code/debugInfoRec.hpp" | |
29 #include "code/icBuffer.hpp" | |
30 #include "code/vtableStubs.hpp" | |
31 #include "interpreter/interpreter.hpp" | |
32 #include "oops/compiledICHolderOop.hpp" | |
33 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
34 #include "runtime/sharedRuntime.hpp" | |
35 #include "runtime/vframeArray.hpp" | |
36 #include "vmreg_x86.inline.hpp" | |
37 #ifdef COMPILER1 | |
38 #include "c1/c1_Runtime1.hpp" | |
39 #endif | |
40 #ifdef COMPILER2 | |
41 #include "opto/runtime.hpp" | |
42 #endif | |
0 | 43 |
44 DeoptimizationBlob *SharedRuntime::_deopt_blob; | |
45 #ifdef COMPILER2 | |
46 UncommonTrapBlob *SharedRuntime::_uncommon_trap_blob; | |
47 ExceptionBlob *OptoRuntime::_exception_blob; | |
48 #endif // COMPILER2 | |
49 | |
50 SafepointBlob *SharedRuntime::_polling_page_safepoint_handler_blob; | |
51 SafepointBlob *SharedRuntime::_polling_page_return_handler_blob; | |
52 RuntimeStub* SharedRuntime::_wrong_method_blob; | |
53 RuntimeStub* SharedRuntime::_ic_miss_blob; | |
54 RuntimeStub* SharedRuntime::_resolve_opt_virtual_call_blob; | |
55 RuntimeStub* SharedRuntime::_resolve_virtual_call_blob; | |
56 RuntimeStub* SharedRuntime::_resolve_static_call_blob; | |
57 | |
524
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58 const int StackAlignmentInSlots = StackAlignmentInBytes / VMRegImpl::stack_slot_size; |
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59 |
0 | 60 #define __ masm-> |
61 | |
62 class SimpleRuntimeFrame { | |
63 | |
64 public: | |
65 | |
66 // Most of the runtime stubs have this simple frame layout. | |
67 // This class exists to make the layout shared in one place. | |
68 // Offsets are for compiler stack slots, which are jints. | |
69 enum layout { | |
70 // The frame sender code expects that rbp will be in the "natural" place and | |
71 // will override any oopMap setting for it. We must therefore force the layout | |
72 // so that it agrees with the frame sender code. | |
73 rbp_off = frame::arg_reg_save_area_bytes/BytesPerInt, | |
74 rbp_off2, | |
75 return_off, return_off2, | |
76 framesize | |
77 }; | |
78 }; | |
79 | |
80 class RegisterSaver { | |
81 // Capture info about frame layout. Layout offsets are in jint | |
82 // units because compiler frame slots are jints. | |
83 #define DEF_XMM_OFFS(regnum) xmm ## regnum ## _off = xmm_off + (regnum)*16/BytesPerInt, xmm ## regnum ## H_off | |
84 enum layout { | |
85 fpu_state_off = frame::arg_reg_save_area_bytes/BytesPerInt, // fxsave save area | |
86 xmm_off = fpu_state_off + 160/BytesPerInt, // offset in fxsave save area | |
87 DEF_XMM_OFFS(0), | |
88 DEF_XMM_OFFS(1), | |
89 DEF_XMM_OFFS(2), | |
90 DEF_XMM_OFFS(3), | |
91 DEF_XMM_OFFS(4), | |
92 DEF_XMM_OFFS(5), | |
93 DEF_XMM_OFFS(6), | |
94 DEF_XMM_OFFS(7), | |
95 DEF_XMM_OFFS(8), | |
96 DEF_XMM_OFFS(9), | |
97 DEF_XMM_OFFS(10), | |
98 DEF_XMM_OFFS(11), | |
99 DEF_XMM_OFFS(12), | |
100 DEF_XMM_OFFS(13), | |
101 DEF_XMM_OFFS(14), | |
102 DEF_XMM_OFFS(15), | |
103 fpu_state_end = fpu_state_off + ((FPUStateSizeInWords-1)*wordSize / BytesPerInt), | |
104 fpu_stateH_end, | |
105 r15_off, r15H_off, | |
106 r14_off, r14H_off, | |
107 r13_off, r13H_off, | |
108 r12_off, r12H_off, | |
109 r11_off, r11H_off, | |
110 r10_off, r10H_off, | |
111 r9_off, r9H_off, | |
112 r8_off, r8H_off, | |
113 rdi_off, rdiH_off, | |
114 rsi_off, rsiH_off, | |
115 ignore_off, ignoreH_off, // extra copy of rbp | |
116 rsp_off, rspH_off, | |
117 rbx_off, rbxH_off, | |
118 rdx_off, rdxH_off, | |
119 rcx_off, rcxH_off, | |
120 rax_off, raxH_off, | |
121 // 16-byte stack alignment fill word: see MacroAssembler::push/pop_IU_state | |
122 align_off, alignH_off, | |
123 flags_off, flagsH_off, | |
124 // The frame sender code expects that rbp will be in the "natural" place and | |
125 // will override any oopMap setting for it. We must therefore force the layout | |
126 // so that it agrees with the frame sender code. | |
127 rbp_off, rbpH_off, // copy of rbp we will restore | |
128 return_off, returnH_off, // slot for return address | |
129 reg_save_size // size in compiler stack slots | |
130 }; | |
131 | |
132 public: | |
133 static OopMap* save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words); | |
134 static void restore_live_registers(MacroAssembler* masm); | |
135 | |
136 // Offsets into the register save area | |
137 // Used by deoptimization when it is managing result register | |
138 // values on its own | |
139 | |
140 static int rax_offset_in_bytes(void) { return BytesPerInt * rax_off; } | |
304 | 141 static int rdx_offset_in_bytes(void) { return BytesPerInt * rdx_off; } |
0 | 142 static int rbx_offset_in_bytes(void) { return BytesPerInt * rbx_off; } |
143 static int xmm0_offset_in_bytes(void) { return BytesPerInt * xmm0_off; } | |
144 static int return_offset_in_bytes(void) { return BytesPerInt * return_off; } | |
145 | |
146 // During deoptimization only the result registers need to be restored, | |
147 // all the other values have already been extracted. | |
148 static void restore_result_registers(MacroAssembler* masm); | |
149 }; | |
150 | |
151 OopMap* RegisterSaver::save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words) { | |
152 | |
153 // Always make the frame size 16-byte aligned | |
154 int frame_size_in_bytes = round_to(additional_frame_words*wordSize + | |
155 reg_save_size*BytesPerInt, 16); | |
156 // OopMap frame size is in compiler stack slots (jint's) not bytes or words | |
157 int frame_size_in_slots = frame_size_in_bytes / BytesPerInt; | |
158 // The caller will allocate additional_frame_words | |
159 int additional_frame_slots = additional_frame_words*wordSize / BytesPerInt; | |
160 // CodeBlob frame size is in words. | |
161 int frame_size_in_words = frame_size_in_bytes / wordSize; | |
162 *total_frame_words = frame_size_in_words; | |
163 | |
164 // Save registers, fpu state, and flags. | |
165 // We assume caller has already pushed the return address onto the | |
166 // stack, so rsp is 8-byte aligned here. | |
167 // We push rpb twice in this sequence because we want the real rbp | |
168 // to be under the return like a normal enter. | |
169 | |
170 __ enter(); // rsp becomes 16-byte aligned here | |
171 __ push_CPU_state(); // Push a multiple of 16 bytes | |
172 if (frame::arg_reg_save_area_bytes != 0) { | |
173 // Allocate argument register save area | |
304 | 174 __ subptr(rsp, frame::arg_reg_save_area_bytes); |
0 | 175 } |
176 | |
177 // Set an oopmap for the call site. This oopmap will map all | |
178 // oop-registers and debug-info registers as callee-saved. This | |
179 // will allow deoptimization at this safepoint to find all possible | |
180 // debug-info recordings, as well as let GC find all oops. | |
181 | |
182 OopMapSet *oop_maps = new OopMapSet(); | |
183 OopMap* map = new OopMap(frame_size_in_slots, 0); | |
184 map->set_callee_saved(VMRegImpl::stack2reg( rax_off + additional_frame_slots), rax->as_VMReg()); | |
185 map->set_callee_saved(VMRegImpl::stack2reg( rcx_off + additional_frame_slots), rcx->as_VMReg()); | |
186 map->set_callee_saved(VMRegImpl::stack2reg( rdx_off + additional_frame_slots), rdx->as_VMReg()); | |
187 map->set_callee_saved(VMRegImpl::stack2reg( rbx_off + additional_frame_slots), rbx->as_VMReg()); | |
188 // rbp location is known implicitly by the frame sender code, needs no oopmap | |
189 // and the location where rbp was saved by is ignored | |
190 map->set_callee_saved(VMRegImpl::stack2reg( rsi_off + additional_frame_slots), rsi->as_VMReg()); | |
191 map->set_callee_saved(VMRegImpl::stack2reg( rdi_off + additional_frame_slots), rdi->as_VMReg()); | |
192 map->set_callee_saved(VMRegImpl::stack2reg( r8_off + additional_frame_slots), r8->as_VMReg()); | |
193 map->set_callee_saved(VMRegImpl::stack2reg( r9_off + additional_frame_slots), r9->as_VMReg()); | |
194 map->set_callee_saved(VMRegImpl::stack2reg( r10_off + additional_frame_slots), r10->as_VMReg()); | |
195 map->set_callee_saved(VMRegImpl::stack2reg( r11_off + additional_frame_slots), r11->as_VMReg()); | |
196 map->set_callee_saved(VMRegImpl::stack2reg( r12_off + additional_frame_slots), r12->as_VMReg()); | |
197 map->set_callee_saved(VMRegImpl::stack2reg( r13_off + additional_frame_slots), r13->as_VMReg()); | |
198 map->set_callee_saved(VMRegImpl::stack2reg( r14_off + additional_frame_slots), r14->as_VMReg()); | |
199 map->set_callee_saved(VMRegImpl::stack2reg( r15_off + additional_frame_slots), r15->as_VMReg()); | |
200 map->set_callee_saved(VMRegImpl::stack2reg(xmm0_off + additional_frame_slots), xmm0->as_VMReg()); | |
201 map->set_callee_saved(VMRegImpl::stack2reg(xmm1_off + additional_frame_slots), xmm1->as_VMReg()); | |
202 map->set_callee_saved(VMRegImpl::stack2reg(xmm2_off + additional_frame_slots), xmm2->as_VMReg()); | |
203 map->set_callee_saved(VMRegImpl::stack2reg(xmm3_off + additional_frame_slots), xmm3->as_VMReg()); | |
204 map->set_callee_saved(VMRegImpl::stack2reg(xmm4_off + additional_frame_slots), xmm4->as_VMReg()); | |
205 map->set_callee_saved(VMRegImpl::stack2reg(xmm5_off + additional_frame_slots), xmm5->as_VMReg()); | |
206 map->set_callee_saved(VMRegImpl::stack2reg(xmm6_off + additional_frame_slots), xmm6->as_VMReg()); | |
207 map->set_callee_saved(VMRegImpl::stack2reg(xmm7_off + additional_frame_slots), xmm7->as_VMReg()); | |
208 map->set_callee_saved(VMRegImpl::stack2reg(xmm8_off + additional_frame_slots), xmm8->as_VMReg()); | |
209 map->set_callee_saved(VMRegImpl::stack2reg(xmm9_off + additional_frame_slots), xmm9->as_VMReg()); | |
210 map->set_callee_saved(VMRegImpl::stack2reg(xmm10_off + additional_frame_slots), xmm10->as_VMReg()); | |
211 map->set_callee_saved(VMRegImpl::stack2reg(xmm11_off + additional_frame_slots), xmm11->as_VMReg()); | |
212 map->set_callee_saved(VMRegImpl::stack2reg(xmm12_off + additional_frame_slots), xmm12->as_VMReg()); | |
213 map->set_callee_saved(VMRegImpl::stack2reg(xmm13_off + additional_frame_slots), xmm13->as_VMReg()); | |
214 map->set_callee_saved(VMRegImpl::stack2reg(xmm14_off + additional_frame_slots), xmm14->as_VMReg()); | |
215 map->set_callee_saved(VMRegImpl::stack2reg(xmm15_off + additional_frame_slots), xmm15->as_VMReg()); | |
216 | |
217 // %%% These should all be a waste but we'll keep things as they were for now | |
218 if (true) { | |
219 map->set_callee_saved(VMRegImpl::stack2reg( raxH_off + additional_frame_slots), | |
220 rax->as_VMReg()->next()); | |
221 map->set_callee_saved(VMRegImpl::stack2reg( rcxH_off + additional_frame_slots), | |
222 rcx->as_VMReg()->next()); | |
223 map->set_callee_saved(VMRegImpl::stack2reg( rdxH_off + additional_frame_slots), | |
224 rdx->as_VMReg()->next()); | |
225 map->set_callee_saved(VMRegImpl::stack2reg( rbxH_off + additional_frame_slots), | |
226 rbx->as_VMReg()->next()); | |
227 // rbp location is known implicitly by the frame sender code, needs no oopmap | |
228 map->set_callee_saved(VMRegImpl::stack2reg( rsiH_off + additional_frame_slots), | |
229 rsi->as_VMReg()->next()); | |
230 map->set_callee_saved(VMRegImpl::stack2reg( rdiH_off + additional_frame_slots), | |
231 rdi->as_VMReg()->next()); | |
232 map->set_callee_saved(VMRegImpl::stack2reg( r8H_off + additional_frame_slots), | |
233 r8->as_VMReg()->next()); | |
234 map->set_callee_saved(VMRegImpl::stack2reg( r9H_off + additional_frame_slots), | |
235 r9->as_VMReg()->next()); | |
236 map->set_callee_saved(VMRegImpl::stack2reg( r10H_off + additional_frame_slots), | |
237 r10->as_VMReg()->next()); | |
238 map->set_callee_saved(VMRegImpl::stack2reg( r11H_off + additional_frame_slots), | |
239 r11->as_VMReg()->next()); | |
240 map->set_callee_saved(VMRegImpl::stack2reg( r12H_off + additional_frame_slots), | |
241 r12->as_VMReg()->next()); | |
242 map->set_callee_saved(VMRegImpl::stack2reg( r13H_off + additional_frame_slots), | |
243 r13->as_VMReg()->next()); | |
244 map->set_callee_saved(VMRegImpl::stack2reg( r14H_off + additional_frame_slots), | |
245 r14->as_VMReg()->next()); | |
246 map->set_callee_saved(VMRegImpl::stack2reg( r15H_off + additional_frame_slots), | |
247 r15->as_VMReg()->next()); | |
248 map->set_callee_saved(VMRegImpl::stack2reg(xmm0H_off + additional_frame_slots), | |
249 xmm0->as_VMReg()->next()); | |
250 map->set_callee_saved(VMRegImpl::stack2reg(xmm1H_off + additional_frame_slots), | |
251 xmm1->as_VMReg()->next()); | |
252 map->set_callee_saved(VMRegImpl::stack2reg(xmm2H_off + additional_frame_slots), | |
253 xmm2->as_VMReg()->next()); | |
254 map->set_callee_saved(VMRegImpl::stack2reg(xmm3H_off + additional_frame_slots), | |
255 xmm3->as_VMReg()->next()); | |
256 map->set_callee_saved(VMRegImpl::stack2reg(xmm4H_off + additional_frame_slots), | |
257 xmm4->as_VMReg()->next()); | |
258 map->set_callee_saved(VMRegImpl::stack2reg(xmm5H_off + additional_frame_slots), | |
259 xmm5->as_VMReg()->next()); | |
260 map->set_callee_saved(VMRegImpl::stack2reg(xmm6H_off + additional_frame_slots), | |
261 xmm6->as_VMReg()->next()); | |
262 map->set_callee_saved(VMRegImpl::stack2reg(xmm7H_off + additional_frame_slots), | |
263 xmm7->as_VMReg()->next()); | |
264 map->set_callee_saved(VMRegImpl::stack2reg(xmm8H_off + additional_frame_slots), | |
265 xmm8->as_VMReg()->next()); | |
266 map->set_callee_saved(VMRegImpl::stack2reg(xmm9H_off + additional_frame_slots), | |
267 xmm9->as_VMReg()->next()); | |
268 map->set_callee_saved(VMRegImpl::stack2reg(xmm10H_off + additional_frame_slots), | |
269 xmm10->as_VMReg()->next()); | |
270 map->set_callee_saved(VMRegImpl::stack2reg(xmm11H_off + additional_frame_slots), | |
271 xmm11->as_VMReg()->next()); | |
272 map->set_callee_saved(VMRegImpl::stack2reg(xmm12H_off + additional_frame_slots), | |
273 xmm12->as_VMReg()->next()); | |
274 map->set_callee_saved(VMRegImpl::stack2reg(xmm13H_off + additional_frame_slots), | |
275 xmm13->as_VMReg()->next()); | |
276 map->set_callee_saved(VMRegImpl::stack2reg(xmm14H_off + additional_frame_slots), | |
277 xmm14->as_VMReg()->next()); | |
278 map->set_callee_saved(VMRegImpl::stack2reg(xmm15H_off + additional_frame_slots), | |
279 xmm15->as_VMReg()->next()); | |
280 } | |
281 | |
282 return map; | |
283 } | |
284 | |
285 void RegisterSaver::restore_live_registers(MacroAssembler* masm) { | |
286 if (frame::arg_reg_save_area_bytes != 0) { | |
287 // Pop arg register save area | |
304 | 288 __ addptr(rsp, frame::arg_reg_save_area_bytes); |
0 | 289 } |
290 // Recover CPU state | |
291 __ pop_CPU_state(); | |
292 // Get the rbp described implicitly by the calling convention (no oopMap) | |
304 | 293 __ pop(rbp); |
0 | 294 } |
295 | |
296 void RegisterSaver::restore_result_registers(MacroAssembler* masm) { | |
297 | |
298 // Just restore result register. Only used by deoptimization. By | |
299 // now any callee save register that needs to be restored to a c2 | |
300 // caller of the deoptee has been extracted into the vframeArray | |
301 // and will be stuffed into the c2i adapter we create for later | |
302 // restoration so only result registers need to be restored here. | |
303 | |
304 // Restore fp result register | |
305 __ movdbl(xmm0, Address(rsp, xmm0_offset_in_bytes())); | |
306 // Restore integer result register | |
304 | 307 __ movptr(rax, Address(rsp, rax_offset_in_bytes())); |
308 __ movptr(rdx, Address(rsp, rdx_offset_in_bytes())); | |
309 | |
0 | 310 // Pop all of the register save are off the stack except the return address |
304 | 311 __ addptr(rsp, return_offset_in_bytes()); |
0 | 312 } |
313 | |
314 // The java_calling_convention describes stack locations as ideal slots on | |
315 // a frame with no abi restrictions. Since we must observe abi restrictions | |
316 // (like the placement of the register window) the slots must be biased by | |
317 // the following value. | |
318 static int reg2offset_in(VMReg r) { | |
319 // Account for saved rbp and return address | |
320 // This should really be in_preserve_stack_slots | |
321 return (r->reg2stack() + 4) * VMRegImpl::stack_slot_size; | |
322 } | |
323 | |
324 static int reg2offset_out(VMReg r) { | |
325 return (r->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size; | |
326 } | |
327 | |
328 // --------------------------------------------------------------------------- | |
329 // Read the array of BasicTypes from a signature, and compute where the | |
330 // arguments should go. Values in the VMRegPair regs array refer to 4-byte | |
331 // quantities. Values less than VMRegImpl::stack0 are registers, those above | |
332 // refer to 4-byte stack slots. All stack slots are based off of the stack pointer | |
333 // as framesizes are fixed. | |
334 // VMRegImpl::stack0 refers to the first slot 0(sp). | |
335 // and VMRegImpl::stack0+1 refers to the memory word 4-byes higher. Register | |
336 // up to RegisterImpl::number_of_registers) are the 64-bit | |
337 // integer registers. | |
338 | |
339 // Note: the INPUTS in sig_bt are in units of Java argument words, which are | |
340 // either 32-bit or 64-bit depending on the build. The OUTPUTS are in 32-bit | |
341 // units regardless of build. Of course for i486 there is no 64 bit build | |
342 | |
343 // The Java calling convention is a "shifted" version of the C ABI. | |
344 // By skipping the first C ABI register we can call non-static jni methods | |
345 // with small numbers of arguments without having to shuffle the arguments | |
346 // at all. Since we control the java ABI we ought to at least get some | |
347 // advantage out of it. | |
348 | |
349 int SharedRuntime::java_calling_convention(const BasicType *sig_bt, | |
350 VMRegPair *regs, | |
351 int total_args_passed, | |
352 int is_outgoing) { | |
353 | |
354 // Create the mapping between argument positions and | |
355 // registers. | |
356 static const Register INT_ArgReg[Argument::n_int_register_parameters_j] = { | |
357 j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5 | |
358 }; | |
359 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_j] = { | |
360 j_farg0, j_farg1, j_farg2, j_farg3, | |
361 j_farg4, j_farg5, j_farg6, j_farg7 | |
362 }; | |
363 | |
364 | |
365 uint int_args = 0; | |
366 uint fp_args = 0; | |
367 uint stk_args = 0; // inc by 2 each time | |
368 | |
369 for (int i = 0; i < total_args_passed; i++) { | |
370 switch (sig_bt[i]) { | |
371 case T_BOOLEAN: | |
372 case T_CHAR: | |
373 case T_BYTE: | |
374 case T_SHORT: | |
375 case T_INT: | |
376 if (int_args < Argument::n_int_register_parameters_j) { | |
377 regs[i].set1(INT_ArgReg[int_args++]->as_VMReg()); | |
378 } else { | |
379 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
380 stk_args += 2; | |
381 } | |
382 break; | |
383 case T_VOID: | |
384 // halves of T_LONG or T_DOUBLE | |
385 assert(i != 0 && (sig_bt[i - 1] == T_LONG || sig_bt[i - 1] == T_DOUBLE), "expecting half"); | |
386 regs[i].set_bad(); | |
387 break; | |
388 case T_LONG: | |
389 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
390 // fall through | |
391 case T_OBJECT: | |
392 case T_ARRAY: | |
393 case T_ADDRESS: | |
394 if (int_args < Argument::n_int_register_parameters_j) { | |
395 regs[i].set2(INT_ArgReg[int_args++]->as_VMReg()); | |
396 } else { | |
397 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
398 stk_args += 2; | |
399 } | |
400 break; | |
401 case T_FLOAT: | |
402 if (fp_args < Argument::n_float_register_parameters_j) { | |
403 regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg()); | |
404 } else { | |
405 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
406 stk_args += 2; | |
407 } | |
408 break; | |
409 case T_DOUBLE: | |
410 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
411 if (fp_args < Argument::n_float_register_parameters_j) { | |
412 regs[i].set2(FP_ArgReg[fp_args++]->as_VMReg()); | |
413 } else { | |
414 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
415 stk_args += 2; | |
416 } | |
417 break; | |
418 default: | |
419 ShouldNotReachHere(); | |
420 break; | |
421 } | |
422 } | |
423 | |
424 return round_to(stk_args, 2); | |
425 } | |
426 | |
427 // Patch the callers callsite with entry to compiled code if it exists. | |
428 static void patch_callers_callsite(MacroAssembler *masm) { | |
429 Label L; | |
430 __ verify_oop(rbx); | |
304 | 431 __ cmpptr(Address(rbx, in_bytes(methodOopDesc::code_offset())), (int32_t)NULL_WORD); |
0 | 432 __ jcc(Assembler::equal, L); |
433 | |
434 // Save the current stack pointer | |
304 | 435 __ mov(r13, rsp); |
0 | 436 // Schedule the branch target address early. |
437 // Call into the VM to patch the caller, then jump to compiled callee | |
438 // rax isn't live so capture return address while we easily can | |
304 | 439 __ movptr(rax, Address(rsp, 0)); |
0 | 440 |
441 // align stack so push_CPU_state doesn't fault | |
304 | 442 __ andptr(rsp, -(StackAlignmentInBytes)); |
0 | 443 __ push_CPU_state(); |
444 | |
445 | |
446 __ verify_oop(rbx); | |
447 // VM needs caller's callsite | |
448 // VM needs target method | |
449 // This needs to be a long call since we will relocate this adapter to | |
450 // the codeBuffer and it may not reach | |
451 | |
452 // Allocate argument register save area | |
453 if (frame::arg_reg_save_area_bytes != 0) { | |
304 | 454 __ subptr(rsp, frame::arg_reg_save_area_bytes); |
0 | 455 } |
304 | 456 __ mov(c_rarg0, rbx); |
457 __ mov(c_rarg1, rax); | |
0 | 458 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite))); |
459 | |
460 // De-allocate argument register save area | |
461 if (frame::arg_reg_save_area_bytes != 0) { | |
304 | 462 __ addptr(rsp, frame::arg_reg_save_area_bytes); |
0 | 463 } |
464 | |
465 __ pop_CPU_state(); | |
466 // restore sp | |
304 | 467 __ mov(rsp, r13); |
0 | 468 __ bind(L); |
469 } | |
470 | |
471 | |
472 static void gen_c2i_adapter(MacroAssembler *masm, | |
473 int total_args_passed, | |
474 int comp_args_on_stack, | |
475 const BasicType *sig_bt, | |
476 const VMRegPair *regs, | |
477 Label& skip_fixup) { | |
478 // Before we get into the guts of the C2I adapter, see if we should be here | |
479 // at all. We've come from compiled code and are attempting to jump to the | |
480 // interpreter, which means the caller made a static call to get here | |
481 // (vcalls always get a compiled target if there is one). Check for a | |
482 // compiled target. If there is one, we need to patch the caller's call. | |
483 patch_callers_callsite(masm); | |
484 | |
485 __ bind(skip_fixup); | |
486 | |
487 // Since all args are passed on the stack, total_args_passed * | |
488 // Interpreter::stackElementSize is the space we need. Plus 1 because | |
489 // we also account for the return address location since | |
490 // we store it first rather than hold it in rax across all the shuffling | |
491 | |
1506 | 492 int extraspace = (total_args_passed * Interpreter::stackElementSize) + wordSize; |
0 | 493 |
494 // stack is aligned, keep it that way | |
495 extraspace = round_to(extraspace, 2*wordSize); | |
496 | |
497 // Get return address | |
304 | 498 __ pop(rax); |
0 | 499 |
500 // set senderSP value | |
304 | 501 __ mov(r13, rsp); |
502 | |
503 __ subptr(rsp, extraspace); | |
0 | 504 |
505 // Store the return address in the expected location | |
304 | 506 __ movptr(Address(rsp, 0), rax); |
0 | 507 |
508 // Now write the args into the outgoing interpreter space | |
509 for (int i = 0; i < total_args_passed; i++) { | |
510 if (sig_bt[i] == T_VOID) { | |
511 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
512 continue; | |
513 } | |
514 | |
515 // offset to start parameters | |
1506 | 516 int st_off = (total_args_passed - i) * Interpreter::stackElementSize; |
517 int next_off = st_off - Interpreter::stackElementSize; | |
0 | 518 |
519 // Say 4 args: | |
520 // i st_off | |
521 // 0 32 T_LONG | |
522 // 1 24 T_VOID | |
523 // 2 16 T_OBJECT | |
524 // 3 8 T_BOOL | |
525 // - 0 return address | |
526 // | |
527 // However to make thing extra confusing. Because we can fit a long/double in | |
528 // a single slot on a 64 bt vm and it would be silly to break them up, the interpreter | |
529 // leaves one slot empty and only stores to a single slot. In this case the | |
530 // slot that is occupied is the T_VOID slot. See I said it was confusing. | |
531 | |
532 VMReg r_1 = regs[i].first(); | |
533 VMReg r_2 = regs[i].second(); | |
534 if (!r_1->is_valid()) { | |
535 assert(!r_2->is_valid(), ""); | |
536 continue; | |
537 } | |
538 if (r_1->is_stack()) { | |
539 // memory to memory use rax | |
540 int ld_off = r_1->reg2stack() * VMRegImpl::stack_slot_size + extraspace; | |
541 if (!r_2->is_valid()) { | |
542 // sign extend?? | |
543 __ movl(rax, Address(rsp, ld_off)); | |
304 | 544 __ movptr(Address(rsp, st_off), rax); |
0 | 545 |
546 } else { | |
547 | |
548 __ movq(rax, Address(rsp, ld_off)); | |
549 | |
550 // Two VMREgs|OptoRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG | |
551 // T_DOUBLE and T_LONG use two slots in the interpreter | |
552 if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
553 // ld_off == LSW, ld_off+wordSize == MSW | |
554 // st_off == MSW, next_off == LSW | |
555 __ movq(Address(rsp, next_off), rax); | |
556 #ifdef ASSERT | |
557 // Overwrite the unused slot with known junk | |
558 __ mov64(rax, CONST64(0xdeadffffdeadaaaa)); | |
304 | 559 __ movptr(Address(rsp, st_off), rax); |
0 | 560 #endif /* ASSERT */ |
561 } else { | |
562 __ movq(Address(rsp, st_off), rax); | |
563 } | |
564 } | |
565 } else if (r_1->is_Register()) { | |
566 Register r = r_1->as_Register(); | |
567 if (!r_2->is_valid()) { | |
568 // must be only an int (or less ) so move only 32bits to slot | |
569 // why not sign extend?? | |
570 __ movl(Address(rsp, st_off), r); | |
571 } else { | |
572 // Two VMREgs|OptoRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG | |
573 // T_DOUBLE and T_LONG use two slots in the interpreter | |
574 if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
575 // long/double in gpr | |
576 #ifdef ASSERT | |
577 // Overwrite the unused slot with known junk | |
578 __ mov64(rax, CONST64(0xdeadffffdeadaaab)); | |
304 | 579 __ movptr(Address(rsp, st_off), rax); |
0 | 580 #endif /* ASSERT */ |
581 __ movq(Address(rsp, next_off), r); | |
582 } else { | |
304 | 583 __ movptr(Address(rsp, st_off), r); |
0 | 584 } |
585 } | |
586 } else { | |
587 assert(r_1->is_XMMRegister(), ""); | |
588 if (!r_2->is_valid()) { | |
589 // only a float use just part of the slot | |
590 __ movflt(Address(rsp, st_off), r_1->as_XMMRegister()); | |
591 } else { | |
592 #ifdef ASSERT | |
593 // Overwrite the unused slot with known junk | |
594 __ mov64(rax, CONST64(0xdeadffffdeadaaac)); | |
304 | 595 __ movptr(Address(rsp, st_off), rax); |
0 | 596 #endif /* ASSERT */ |
597 __ movdbl(Address(rsp, next_off), r_1->as_XMMRegister()); | |
598 } | |
599 } | |
600 } | |
601 | |
602 // Schedule the branch target address early. | |
304 | 603 __ movptr(rcx, Address(rbx, in_bytes(methodOopDesc::interpreter_entry_offset()))); |
0 | 604 __ jmp(rcx); |
605 } | |
606 | |
607 static void gen_i2c_adapter(MacroAssembler *masm, | |
608 int total_args_passed, | |
609 int comp_args_on_stack, | |
610 const BasicType *sig_bt, | |
611 const VMRegPair *regs) { | |
612 | |
613 // | |
614 // We will only enter here from an interpreted frame and never from after | |
615 // passing thru a c2i. Azul allowed this but we do not. If we lose the | |
616 // race and use a c2i we will remain interpreted for the race loser(s). | |
617 // This removes all sorts of headaches on the x86 side and also eliminates | |
618 // the possibility of having c2i -> i2c -> c2i -> ... endless transitions. | |
619 | |
620 | |
621 // Note: r13 contains the senderSP on entry. We must preserve it since | |
622 // we may do a i2c -> c2i transition if we lose a race where compiled | |
623 // code goes non-entrant while we get args ready. | |
624 // In addition we use r13 to locate all the interpreter args as | |
625 // we must align the stack to 16 bytes on an i2c entry else we | |
626 // lose alignment we expect in all compiled code and register | |
627 // save code can segv when fxsave instructions find improperly | |
628 // aligned stack pointer. | |
629 | |
304 | 630 __ movptr(rax, Address(rsp, 0)); |
0 | 631 |
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632 // Must preserve original SP for loading incoming arguments because |
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633 // we need to align the outgoing SP for compiled code. |
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634 __ movptr(r11, rsp); |
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635 |
0 | 636 // Cut-out for having no stack args. Since up to 2 int/oop args are passed |
637 // in registers, we will occasionally have no stack args. | |
638 int comp_words_on_stack = 0; | |
639 if (comp_args_on_stack) { | |
640 // Sig words on the stack are greater-than VMRegImpl::stack0. Those in | |
641 // registers are below. By subtracting stack0, we either get a negative | |
642 // number (all values in registers) or the maximum stack slot accessed. | |
643 | |
644 // Convert 4-byte c2 stack slots to words. | |
645 comp_words_on_stack = round_to(comp_args_on_stack*VMRegImpl::stack_slot_size, wordSize)>>LogBytesPerWord; | |
646 // Round up to miminum stack alignment, in wordSize | |
647 comp_words_on_stack = round_to(comp_words_on_stack, 2); | |
304 | 648 __ subptr(rsp, comp_words_on_stack * wordSize); |
0 | 649 } |
650 | |
651 | |
652 // Ensure compiled code always sees stack at proper alignment | |
304 | 653 __ andptr(rsp, -16); |
0 | 654 |
655 // push the return address and misalign the stack that youngest frame always sees | |
656 // as far as the placement of the call instruction | |
304 | 657 __ push(rax); |
0 | 658 |
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659 // Put saved SP in another register |
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660 const Register saved_sp = rax; |
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661 __ movptr(saved_sp, r11); |
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662 |
0 | 663 // Will jump to the compiled code just as if compiled code was doing it. |
664 // Pre-load the register-jump target early, to schedule it better. | |
304 | 665 __ movptr(r11, Address(rbx, in_bytes(methodOopDesc::from_compiled_offset()))); |
0 | 666 |
667 // Now generate the shuffle code. Pick up all register args and move the | |
668 // rest through the floating point stack top. | |
669 for (int i = 0; i < total_args_passed; i++) { | |
670 if (sig_bt[i] == T_VOID) { | |
671 // Longs and doubles are passed in native word order, but misaligned | |
672 // in the 32-bit build. | |
673 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
674 continue; | |
675 } | |
676 | |
677 // Pick up 0, 1 or 2 words from SP+offset. | |
678 | |
679 assert(!regs[i].second()->is_valid() || regs[i].first()->next() == regs[i].second(), | |
680 "scrambled load targets?"); | |
681 // Load in argument order going down. | |
1506 | 682 int ld_off = (total_args_passed - i)*Interpreter::stackElementSize; |
0 | 683 // Point to interpreter value (vs. tag) |
1506 | 684 int next_off = ld_off - Interpreter::stackElementSize; |
0 | 685 // |
686 // | |
687 // | |
688 VMReg r_1 = regs[i].first(); | |
689 VMReg r_2 = regs[i].second(); | |
690 if (!r_1->is_valid()) { | |
691 assert(!r_2->is_valid(), ""); | |
692 continue; | |
693 } | |
694 if (r_1->is_stack()) { | |
695 // Convert stack slot to an SP offset (+ wordSize to account for return address ) | |
696 int st_off = regs[i].first()->reg2stack()*VMRegImpl::stack_slot_size + wordSize; | |
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697 |
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698 // We can use r13 as a temp here because compiled code doesn't need r13 as an input |
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699 // and if we end up going thru a c2i because of a miss a reasonable value of r13 |
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700 // will be generated. |
0 | 701 if (!r_2->is_valid()) { |
702 // sign extend??? | |
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703 __ movl(r13, Address(saved_sp, ld_off)); |
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704 __ movptr(Address(rsp, st_off), r13); |
0 | 705 } else { |
706 // | |
707 // We are using two optoregs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE | |
708 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case | |
709 // So we must adjust where to pick up the data to match the interpreter. | |
710 // | |
711 // Interpreter local[n] == MSW, local[n+1] == LSW however locals | |
712 // are accessed as negative so LSW is at LOW address | |
713 | |
714 // ld_off is MSW so get LSW | |
715 const int offset = (sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? | |
716 next_off : ld_off; | |
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717 __ movq(r13, Address(saved_sp, offset)); |
0 | 718 // st_off is LSW (i.e. reg.first()) |
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719 __ movq(Address(rsp, st_off), r13); |
0 | 720 } |
721 } else if (r_1->is_Register()) { // Register argument | |
722 Register r = r_1->as_Register(); | |
723 assert(r != rax, "must be different"); | |
724 if (r_2->is_valid()) { | |
725 // | |
726 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE | |
727 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case | |
728 // So we must adjust where to pick up the data to match the interpreter. | |
729 | |
730 const int offset = (sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? | |
731 next_off : ld_off; | |
732 | |
733 // this can be a misaligned move | |
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734 __ movq(r, Address(saved_sp, offset)); |
0 | 735 } else { |
736 // sign extend and use a full word? | |
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737 __ movl(r, Address(saved_sp, ld_off)); |
0 | 738 } |
739 } else { | |
740 if (!r_2->is_valid()) { | |
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741 __ movflt(r_1->as_XMMRegister(), Address(saved_sp, ld_off)); |
0 | 742 } else { |
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743 __ movdbl(r_1->as_XMMRegister(), Address(saved_sp, next_off)); |
0 | 744 } |
745 } | |
746 } | |
747 | |
748 // 6243940 We might end up in handle_wrong_method if | |
749 // the callee is deoptimized as we race thru here. If that | |
750 // happens we don't want to take a safepoint because the | |
751 // caller frame will look interpreted and arguments are now | |
752 // "compiled" so it is much better to make this transition | |
753 // invisible to the stack walking code. Unfortunately if | |
754 // we try and find the callee by normal means a safepoint | |
755 // is possible. So we stash the desired callee in the thread | |
756 // and the vm will find there should this case occur. | |
757 | |
304 | 758 __ movptr(Address(r15_thread, JavaThread::callee_target_offset()), rbx); |
0 | 759 |
760 // put methodOop where a c2i would expect should we end up there | |
761 // only needed becaus eof c2 resolve stubs return methodOop as a result in | |
762 // rax | |
304 | 763 __ mov(rax, rbx); |
0 | 764 __ jmp(r11); |
765 } | |
766 | |
767 // --------------------------------------------------------------- | |
768 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm, | |
769 int total_args_passed, | |
770 int comp_args_on_stack, | |
771 const BasicType *sig_bt, | |
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772 const VMRegPair *regs, |
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773 AdapterFingerPrint* fingerprint) { |
0 | 774 address i2c_entry = __ pc(); |
775 | |
776 gen_i2c_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs); | |
777 | |
778 // ------------------------------------------------------------------------- | |
779 // Generate a C2I adapter. On entry we know rbx holds the methodOop during calls | |
780 // to the interpreter. The args start out packed in the compiled layout. They | |
781 // need to be unpacked into the interpreter layout. This will almost always | |
782 // require some stack space. We grow the current (compiled) stack, then repack | |
783 // the args. We finally end in a jump to the generic interpreter entry point. | |
784 // On exit from the interpreter, the interpreter will restore our SP (lest the | |
785 // compiled code, which relys solely on SP and not RBP, get sick). | |
786 | |
787 address c2i_unverified_entry = __ pc(); | |
788 Label skip_fixup; | |
789 Label ok; | |
790 | |
791 Register holder = rax; | |
792 Register receiver = j_rarg0; | |
793 Register temp = rbx; | |
794 | |
795 { | |
796 __ verify_oop(holder); | |
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797 __ load_klass(temp, receiver); |
0 | 798 __ verify_oop(temp); |
799 | |
304 | 800 __ cmpptr(temp, Address(holder, compiledICHolderOopDesc::holder_klass_offset())); |
801 __ movptr(rbx, Address(holder, compiledICHolderOopDesc::holder_method_offset())); | |
0 | 802 __ jcc(Assembler::equal, ok); |
803 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
804 | |
805 __ bind(ok); | |
806 // Method might have been compiled since the call site was patched to | |
807 // interpreted if that is the case treat it as a miss so we can get | |
808 // the call site corrected. | |
304 | 809 __ cmpptr(Address(rbx, in_bytes(methodOopDesc::code_offset())), (int32_t)NULL_WORD); |
0 | 810 __ jcc(Assembler::equal, skip_fixup); |
811 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
812 } | |
813 | |
814 address c2i_entry = __ pc(); | |
815 | |
816 gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup); | |
817 | |
818 __ flush(); | |
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819 return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
0 | 820 } |
821 | |
822 int SharedRuntime::c_calling_convention(const BasicType *sig_bt, | |
823 VMRegPair *regs, | |
824 int total_args_passed) { | |
825 // We return the amount of VMRegImpl stack slots we need to reserve for all | |
826 // the arguments NOT counting out_preserve_stack_slots. | |
827 | |
828 // NOTE: These arrays will have to change when c1 is ported | |
829 #ifdef _WIN64 | |
830 static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = { | |
831 c_rarg0, c_rarg1, c_rarg2, c_rarg3 | |
832 }; | |
833 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_c] = { | |
834 c_farg0, c_farg1, c_farg2, c_farg3 | |
835 }; | |
836 #else | |
837 static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = { | |
838 c_rarg0, c_rarg1, c_rarg2, c_rarg3, c_rarg4, c_rarg5 | |
839 }; | |
840 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_c] = { | |
841 c_farg0, c_farg1, c_farg2, c_farg3, | |
842 c_farg4, c_farg5, c_farg6, c_farg7 | |
843 }; | |
844 #endif // _WIN64 | |
845 | |
846 | |
847 uint int_args = 0; | |
848 uint fp_args = 0; | |
849 uint stk_args = 0; // inc by 2 each time | |
850 | |
851 for (int i = 0; i < total_args_passed; i++) { | |
852 switch (sig_bt[i]) { | |
853 case T_BOOLEAN: | |
854 case T_CHAR: | |
855 case T_BYTE: | |
856 case T_SHORT: | |
857 case T_INT: | |
858 if (int_args < Argument::n_int_register_parameters_c) { | |
859 regs[i].set1(INT_ArgReg[int_args++]->as_VMReg()); | |
860 #ifdef _WIN64 | |
861 fp_args++; | |
862 // Allocate slots for callee to stuff register args the stack. | |
863 stk_args += 2; | |
864 #endif | |
865 } else { | |
866 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
867 stk_args += 2; | |
868 } | |
869 break; | |
870 case T_LONG: | |
871 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
872 // fall through | |
873 case T_OBJECT: | |
874 case T_ARRAY: | |
875 case T_ADDRESS: | |
876 if (int_args < Argument::n_int_register_parameters_c) { | |
877 regs[i].set2(INT_ArgReg[int_args++]->as_VMReg()); | |
878 #ifdef _WIN64 | |
879 fp_args++; | |
880 stk_args += 2; | |
881 #endif | |
882 } else { | |
883 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
884 stk_args += 2; | |
885 } | |
886 break; | |
887 case T_FLOAT: | |
888 if (fp_args < Argument::n_float_register_parameters_c) { | |
889 regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg()); | |
890 #ifdef _WIN64 | |
891 int_args++; | |
892 // Allocate slots for callee to stuff register args the stack. | |
893 stk_args += 2; | |
894 #endif | |
895 } else { | |
896 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
897 stk_args += 2; | |
898 } | |
899 break; | |
900 case T_DOUBLE: | |
901 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
902 if (fp_args < Argument::n_float_register_parameters_c) { | |
903 regs[i].set2(FP_ArgReg[fp_args++]->as_VMReg()); | |
904 #ifdef _WIN64 | |
905 int_args++; | |
906 // Allocate slots for callee to stuff register args the stack. | |
907 stk_args += 2; | |
908 #endif | |
909 } else { | |
910 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
911 stk_args += 2; | |
912 } | |
913 break; | |
914 case T_VOID: // Halves of longs and doubles | |
915 assert(i != 0 && (sig_bt[i - 1] == T_LONG || sig_bt[i - 1] == T_DOUBLE), "expecting half"); | |
916 regs[i].set_bad(); | |
917 break; | |
918 default: | |
919 ShouldNotReachHere(); | |
920 break; | |
921 } | |
922 } | |
923 #ifdef _WIN64 | |
924 // windows abi requires that we always allocate enough stack space | |
925 // for 4 64bit registers to be stored down. | |
926 if (stk_args < 8) { | |
927 stk_args = 8; | |
928 } | |
929 #endif // _WIN64 | |
930 | |
931 return stk_args; | |
932 } | |
933 | |
934 // On 64 bit we will store integer like items to the stack as | |
935 // 64 bits items (sparc abi) even though java would only store | |
936 // 32bits for a parameter. On 32bit it will simply be 32 bits | |
937 // So this routine will do 32->32 on 32bit and 32->64 on 64bit | |
938 static void move32_64(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
939 if (src.first()->is_stack()) { | |
940 if (dst.first()->is_stack()) { | |
941 // stack to stack | |
942 __ movslq(rax, Address(rbp, reg2offset_in(src.first()))); | |
943 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
944 } else { | |
945 // stack to reg | |
946 __ movslq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()))); | |
947 } | |
948 } else if (dst.first()->is_stack()) { | |
949 // reg to stack | |
950 // Do we really have to sign extend??? | |
951 // __ movslq(src.first()->as_Register(), src.first()->as_Register()); | |
952 __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); | |
953 } else { | |
954 // Do we really have to sign extend??? | |
955 // __ movslq(dst.first()->as_Register(), src.first()->as_Register()); | |
956 if (dst.first() != src.first()) { | |
957 __ movq(dst.first()->as_Register(), src.first()->as_Register()); | |
958 } | |
959 } | |
960 } | |
961 | |
962 | |
963 // An oop arg. Must pass a handle not the oop itself | |
964 static void object_move(MacroAssembler* masm, | |
965 OopMap* map, | |
966 int oop_handle_offset, | |
967 int framesize_in_slots, | |
968 VMRegPair src, | |
969 VMRegPair dst, | |
970 bool is_receiver, | |
971 int* receiver_offset) { | |
972 | |
973 // must pass a handle. First figure out the location we use as a handle | |
974 | |
975 Register rHandle = dst.first()->is_stack() ? rax : dst.first()->as_Register(); | |
976 | |
977 // See if oop is NULL if it is we need no handle | |
978 | |
979 if (src.first()->is_stack()) { | |
980 | |
981 // Oop is already on the stack as an argument | |
982 int offset_in_older_frame = src.first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); | |
983 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + framesize_in_slots)); | |
984 if (is_receiver) { | |
985 *receiver_offset = (offset_in_older_frame + framesize_in_slots) * VMRegImpl::stack_slot_size; | |
986 } | |
987 | |
304 | 988 __ cmpptr(Address(rbp, reg2offset_in(src.first())), (int32_t)NULL_WORD); |
989 __ lea(rHandle, Address(rbp, reg2offset_in(src.first()))); | |
0 | 990 // conditionally move a NULL |
304 | 991 __ cmovptr(Assembler::equal, rHandle, Address(rbp, reg2offset_in(src.first()))); |
0 | 992 } else { |
993 | |
994 // Oop is in an a register we must store it to the space we reserve | |
995 // on the stack for oop_handles and pass a handle if oop is non-NULL | |
996 | |
997 const Register rOop = src.first()->as_Register(); | |
998 int oop_slot; | |
999 if (rOop == j_rarg0) | |
1000 oop_slot = 0; | |
1001 else if (rOop == j_rarg1) | |
1002 oop_slot = 1; | |
1003 else if (rOop == j_rarg2) | |
1004 oop_slot = 2; | |
1005 else if (rOop == j_rarg3) | |
1006 oop_slot = 3; | |
1007 else if (rOop == j_rarg4) | |
1008 oop_slot = 4; | |
1009 else { | |
1010 assert(rOop == j_rarg5, "wrong register"); | |
1011 oop_slot = 5; | |
1012 } | |
1013 | |
1014 oop_slot = oop_slot * VMRegImpl::slots_per_word + oop_handle_offset; | |
1015 int offset = oop_slot*VMRegImpl::stack_slot_size; | |
1016 | |
1017 map->set_oop(VMRegImpl::stack2reg(oop_slot)); | |
1018 // Store oop in handle area, may be NULL | |
304 | 1019 __ movptr(Address(rsp, offset), rOop); |
0 | 1020 if (is_receiver) { |
1021 *receiver_offset = offset; | |
1022 } | |
1023 | |
304 | 1024 __ cmpptr(rOop, (int32_t)NULL_WORD); |
1025 __ lea(rHandle, Address(rsp, offset)); | |
0 | 1026 // conditionally move a NULL from the handle area where it was just stored |
304 | 1027 __ cmovptr(Assembler::equal, rHandle, Address(rsp, offset)); |
0 | 1028 } |
1029 | |
1030 // If arg is on the stack then place it otherwise it is already in correct reg. | |
1031 if (dst.first()->is_stack()) { | |
304 | 1032 __ movptr(Address(rsp, reg2offset_out(dst.first())), rHandle); |
0 | 1033 } |
1034 } | |
1035 | |
1036 // A float arg may have to do float reg int reg conversion | |
1037 static void float_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1038 assert(!src.second()->is_valid() && !dst.second()->is_valid(), "bad float_move"); | |
1039 | |
1040 // The calling conventions assures us that each VMregpair is either | |
1041 // all really one physical register or adjacent stack slots. | |
1042 // This greatly simplifies the cases here compared to sparc. | |
1043 | |
1044 if (src.first()->is_stack()) { | |
1045 if (dst.first()->is_stack()) { | |
1046 __ movl(rax, Address(rbp, reg2offset_in(src.first()))); | |
304 | 1047 __ movptr(Address(rsp, reg2offset_out(dst.first())), rax); |
0 | 1048 } else { |
1049 // stack to reg | |
1050 assert(dst.first()->is_XMMRegister(), "only expect xmm registers as parameters"); | |
1051 __ movflt(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_in(src.first()))); | |
1052 } | |
1053 } else if (dst.first()->is_stack()) { | |
1054 // reg to stack | |
1055 assert(src.first()->is_XMMRegister(), "only expect xmm registers as parameters"); | |
1056 __ movflt(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); | |
1057 } else { | |
1058 // reg to reg | |
1059 // In theory these overlap but the ordering is such that this is likely a nop | |
1060 if ( src.first() != dst.first()) { | |
1061 __ movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister()); | |
1062 } | |
1063 } | |
1064 } | |
1065 | |
1066 // A long move | |
1067 static void long_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1068 | |
1069 // The calling conventions assures us that each VMregpair is either | |
1070 // all really one physical register or adjacent stack slots. | |
1071 // This greatly simplifies the cases here compared to sparc. | |
1072 | |
1073 if (src.is_single_phys_reg() ) { | |
1074 if (dst.is_single_phys_reg()) { | |
1075 if (dst.first() != src.first()) { | |
304 | 1076 __ mov(dst.first()->as_Register(), src.first()->as_Register()); |
0 | 1077 } |
1078 } else { | |
1079 assert(dst.is_single_reg(), "not a stack pair"); | |
1080 __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); | |
1081 } | |
1082 } else if (dst.is_single_phys_reg()) { | |
1083 assert(src.is_single_reg(), "not a stack pair"); | |
1084 __ movq(dst.first()->as_Register(), Address(rbp, reg2offset_out(src.first()))); | |
1085 } else { | |
1086 assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs"); | |
1087 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); | |
1088 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
1089 } | |
1090 } | |
1091 | |
1092 // A double move | |
1093 static void double_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1094 | |
1095 // The calling conventions assures us that each VMregpair is either | |
1096 // all really one physical register or adjacent stack slots. | |
1097 // This greatly simplifies the cases here compared to sparc. | |
1098 | |
1099 if (src.is_single_phys_reg() ) { | |
1100 if (dst.is_single_phys_reg()) { | |
1101 // In theory these overlap but the ordering is such that this is likely a nop | |
1102 if ( src.first() != dst.first()) { | |
1103 __ movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister()); | |
1104 } | |
1105 } else { | |
1106 assert(dst.is_single_reg(), "not a stack pair"); | |
1107 __ movdbl(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); | |
1108 } | |
1109 } else if (dst.is_single_phys_reg()) { | |
1110 assert(src.is_single_reg(), "not a stack pair"); | |
1111 __ movdbl(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_out(src.first()))); | |
1112 } else { | |
1113 assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs"); | |
1114 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); | |
1115 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
1116 } | |
1117 } | |
1118 | |
1119 | |
1120 void SharedRuntime::save_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1121 // We always ignore the frame_slots arg and just use the space just below frame pointer | |
1122 // which by this time is free to use | |
1123 switch (ret_type) { | |
1124 case T_FLOAT: | |
1125 __ movflt(Address(rbp, -wordSize), xmm0); | |
1126 break; | |
1127 case T_DOUBLE: | |
1128 __ movdbl(Address(rbp, -wordSize), xmm0); | |
1129 break; | |
1130 case T_VOID: break; | |
1131 default: { | |
304 | 1132 __ movptr(Address(rbp, -wordSize), rax); |
0 | 1133 } |
1134 } | |
1135 } | |
1136 | |
1137 void SharedRuntime::restore_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1138 // We always ignore the frame_slots arg and just use the space just below frame pointer | |
1139 // which by this time is free to use | |
1140 switch (ret_type) { | |
1141 case T_FLOAT: | |
1142 __ movflt(xmm0, Address(rbp, -wordSize)); | |
1143 break; | |
1144 case T_DOUBLE: | |
1145 __ movdbl(xmm0, Address(rbp, -wordSize)); | |
1146 break; | |
1147 case T_VOID: break; | |
1148 default: { | |
304 | 1149 __ movptr(rax, Address(rbp, -wordSize)); |
0 | 1150 } |
1151 } | |
1152 } | |
1153 | |
1154 static void save_args(MacroAssembler *masm, int arg_count, int first_arg, VMRegPair *args) { | |
1155 for ( int i = first_arg ; i < arg_count ; i++ ) { | |
1156 if (args[i].first()->is_Register()) { | |
304 | 1157 __ push(args[i].first()->as_Register()); |
0 | 1158 } else if (args[i].first()->is_XMMRegister()) { |
304 | 1159 __ subptr(rsp, 2*wordSize); |
0 | 1160 __ movdbl(Address(rsp, 0), args[i].first()->as_XMMRegister()); |
1161 } | |
1162 } | |
1163 } | |
1164 | |
1165 static void restore_args(MacroAssembler *masm, int arg_count, int first_arg, VMRegPair *args) { | |
1166 for ( int i = arg_count - 1 ; i >= first_arg ; i-- ) { | |
1167 if (args[i].first()->is_Register()) { | |
304 | 1168 __ pop(args[i].first()->as_Register()); |
0 | 1169 } else if (args[i].first()->is_XMMRegister()) { |
1170 __ movdbl(args[i].first()->as_XMMRegister(), Address(rsp, 0)); | |
304 | 1171 __ addptr(rsp, 2*wordSize); |
0 | 1172 } |
1173 } | |
1174 } | |
1175 | |
1176 // --------------------------------------------------------------------------- | |
1177 // Generate a native wrapper for a given method. The method takes arguments | |
1178 // in the Java compiled code convention, marshals them to the native | |
1179 // convention (handlizes oops, etc), transitions to native, makes the call, | |
1180 // returns to java state (possibly blocking), unhandlizes any result and | |
1181 // returns. | |
1182 nmethod *SharedRuntime::generate_native_wrapper(MacroAssembler *masm, | |
1183 methodHandle method, | |
1184 int total_in_args, | |
1185 int comp_args_on_stack, | |
1186 BasicType *in_sig_bt, | |
1187 VMRegPair *in_regs, | |
1188 BasicType ret_type) { | |
1189 // Native nmethod wrappers never take possesion of the oop arguments. | |
1190 // So the caller will gc the arguments. The only thing we need an | |
1191 // oopMap for is if the call is static | |
1192 // | |
1193 // An OopMap for lock (and class if static) | |
1194 OopMapSet *oop_maps = new OopMapSet(); | |
1195 intptr_t start = (intptr_t)__ pc(); | |
1196 | |
1197 // We have received a description of where all the java arg are located | |
1198 // on entry to the wrapper. We need to convert these args to where | |
1199 // the jni function will expect them. To figure out where they go | |
1200 // we convert the java signature to a C signature by inserting | |
1201 // the hidden arguments as arg[0] and possibly arg[1] (static method) | |
1202 | |
1203 int total_c_args = total_in_args + 1; | |
1204 if (method->is_static()) { | |
1205 total_c_args++; | |
1206 } | |
1207 | |
1208 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_c_args); | |
1209 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_c_args); | |
1210 | |
1211 int argc = 0; | |
1212 out_sig_bt[argc++] = T_ADDRESS; | |
1213 if (method->is_static()) { | |
1214 out_sig_bt[argc++] = T_OBJECT; | |
1215 } | |
1216 | |
1217 for (int i = 0; i < total_in_args ; i++ ) { | |
1218 out_sig_bt[argc++] = in_sig_bt[i]; | |
1219 } | |
1220 | |
1221 // Now figure out where the args must be stored and how much stack space | |
1222 // they require. | |
1223 // | |
1224 int out_arg_slots; | |
1225 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); | |
1226 | |
1227 // Compute framesize for the wrapper. We need to handlize all oops in | |
1228 // incoming registers | |
1229 | |
1230 // Calculate the total number of stack slots we will need. | |
1231 | |
1232 // First count the abi requirement plus all of the outgoing args | |
1233 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; | |
1234 | |
1235 // Now the space for the inbound oop handle area | |
1236 | |
1237 int oop_handle_offset = stack_slots; | |
1238 stack_slots += 6*VMRegImpl::slots_per_word; | |
1239 | |
1240 // Now any space we need for handlizing a klass if static method | |
1241 | |
1242 int oop_temp_slot_offset = 0; | |
1243 int klass_slot_offset = 0; | |
1244 int klass_offset = -1; | |
1245 int lock_slot_offset = 0; | |
1246 bool is_static = false; | |
1247 | |
1248 if (method->is_static()) { | |
1249 klass_slot_offset = stack_slots; | |
1250 stack_slots += VMRegImpl::slots_per_word; | |
1251 klass_offset = klass_slot_offset * VMRegImpl::stack_slot_size; | |
1252 is_static = true; | |
1253 } | |
1254 | |
1255 // Plus a lock if needed | |
1256 | |
1257 if (method->is_synchronized()) { | |
1258 lock_slot_offset = stack_slots; | |
1259 stack_slots += VMRegImpl::slots_per_word; | |
1260 } | |
1261 | |
1262 // Now a place (+2) to save return values or temp during shuffling | |
1263 // + 4 for return address (which we own) and saved rbp | |
1264 stack_slots += 6; | |
1265 | |
1266 // Ok The space we have allocated will look like: | |
1267 // | |
1268 // | |
1269 // FP-> | | | |
1270 // |---------------------| | |
1271 // | 2 slots for moves | | |
1272 // |---------------------| | |
1273 // | lock box (if sync) | | |
1274 // |---------------------| <- lock_slot_offset | |
1275 // | klass (if static) | | |
1276 // |---------------------| <- klass_slot_offset | |
1277 // | oopHandle area | | |
1278 // |---------------------| <- oop_handle_offset (6 java arg registers) | |
1279 // | outbound memory | | |
1280 // | based arguments | | |
1281 // | | | |
1282 // |---------------------| | |
1283 // | | | |
1284 // SP-> | out_preserved_slots | | |
1285 // | |
1286 // | |
1287 | |
1288 | |
1289 // Now compute actual number of stack words we need rounding to make | |
1290 // stack properly aligned. | |
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1291 stack_slots = round_to(stack_slots, StackAlignmentInSlots); |
0 | 1292 |
1293 int stack_size = stack_slots * VMRegImpl::stack_slot_size; | |
1294 | |
1295 | |
1296 // First thing make an ic check to see if we should even be here | |
1297 | |
1298 // We are free to use all registers as temps without saving them and | |
1299 // restoring them except rbp. rbp is the only callee save register | |
1300 // as far as the interpreter and the compiler(s) are concerned. | |
1301 | |
1302 | |
1303 const Register ic_reg = rax; | |
1304 const Register receiver = j_rarg0; | |
1305 | |
1306 Label ok; | |
1307 Label exception_pending; | |
1308 | |
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1309 assert_different_registers(ic_reg, receiver, rscratch1); |
0 | 1310 __ verify_oop(receiver); |
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1311 __ load_klass(rscratch1, receiver); |
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1312 __ cmpq(ic_reg, rscratch1); |
0 | 1313 __ jcc(Assembler::equal, ok); |
1314 | |
1315 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
1316 | |
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1317 __ bind(ok); |
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1318 |
0 | 1319 // Verified entry point must be aligned |
1320 __ align(8); | |
1321 | |
1322 int vep_offset = ((intptr_t)__ pc()) - start; | |
1323 | |
1324 // The instruction at the verified entry point must be 5 bytes or longer | |
1325 // because it can be patched on the fly by make_non_entrant. The stack bang | |
1326 // instruction fits that requirement. | |
1327 | |
1328 // Generate stack overflow check | |
1329 | |
1330 if (UseStackBanging) { | |
1331 __ bang_stack_with_offset(StackShadowPages*os::vm_page_size()); | |
1332 } else { | |
1333 // need a 5 byte instruction to allow MT safe patching to non-entrant | |
1334 __ fat_nop(); | |
1335 } | |
1336 | |
1337 // Generate a new frame for the wrapper. | |
1338 __ enter(); | |
1339 // -2 because return address is already present and so is saved rbp | |
304 | 1340 __ subptr(rsp, stack_size - 2*wordSize); |
0 | 1341 |
1342 // Frame is now completed as far as size and linkage. | |
1343 | |
1344 int frame_complete = ((intptr_t)__ pc()) - start; | |
1345 | |
1346 #ifdef ASSERT | |
1347 { | |
1348 Label L; | |
304 | 1349 __ mov(rax, rsp); |
605 | 1350 __ andptr(rax, -16); // must be 16 byte boundary (see amd64 ABI) |
304 | 1351 __ cmpptr(rax, rsp); |
0 | 1352 __ jcc(Assembler::equal, L); |
1353 __ stop("improperly aligned stack"); | |
1354 __ bind(L); | |
1355 } | |
1356 #endif /* ASSERT */ | |
1357 | |
1358 | |
1359 // We use r14 as the oop handle for the receiver/klass | |
1360 // It is callee save so it survives the call to native | |
1361 | |
1362 const Register oop_handle_reg = r14; | |
1363 | |
1364 | |
1365 | |
1366 // | |
1367 // We immediately shuffle the arguments so that any vm call we have to | |
1368 // make from here on out (sync slow path, jvmti, etc.) we will have | |
1369 // captured the oops from our caller and have a valid oopMap for | |
1370 // them. | |
1371 | |
1372 // ----------------- | |
1373 // The Grand Shuffle | |
1374 | |
1375 // The Java calling convention is either equal (linux) or denser (win64) than the | |
1376 // c calling convention. However the because of the jni_env argument the c calling | |
1377 // convention always has at least one more (and two for static) arguments than Java. | |
1378 // Therefore if we move the args from java -> c backwards then we will never have | |
1379 // a register->register conflict and we don't have to build a dependency graph | |
1380 // and figure out how to break any cycles. | |
1381 // | |
1382 | |
1383 // Record esp-based slot for receiver on stack for non-static methods | |
1384 int receiver_offset = -1; | |
1385 | |
1386 // This is a trick. We double the stack slots so we can claim | |
1387 // the oops in the caller's frame. Since we are sure to have | |
1388 // more args than the caller doubling is enough to make | |
1389 // sure we can capture all the incoming oop args from the | |
1390 // caller. | |
1391 // | |
1392 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); | |
1393 | |
1394 // Mark location of rbp (someday) | |
1395 // map->set_callee_saved(VMRegImpl::stack2reg( stack_slots - 2), stack_slots * 2, 0, vmreg(rbp)); | |
1396 | |
1397 // Use eax, ebx as temporaries during any memory-memory moves we have to do | |
1398 // All inbound args are referenced based on rbp and all outbound args via rsp. | |
1399 | |
1400 | |
1401 #ifdef ASSERT | |
1402 bool reg_destroyed[RegisterImpl::number_of_registers]; | |
1403 bool freg_destroyed[XMMRegisterImpl::number_of_registers]; | |
1404 for ( int r = 0 ; r < RegisterImpl::number_of_registers ; r++ ) { | |
1405 reg_destroyed[r] = false; | |
1406 } | |
1407 for ( int f = 0 ; f < XMMRegisterImpl::number_of_registers ; f++ ) { | |
1408 freg_destroyed[f] = false; | |
1409 } | |
1410 | |
1411 #endif /* ASSERT */ | |
1412 | |
1413 | |
1414 int c_arg = total_c_args - 1; | |
1415 for ( int i = total_in_args - 1; i >= 0 ; i--, c_arg-- ) { | |
1416 #ifdef ASSERT | |
1417 if (in_regs[i].first()->is_Register()) { | |
1418 assert(!reg_destroyed[in_regs[i].first()->as_Register()->encoding()], "destroyed reg!"); | |
1419 } else if (in_regs[i].first()->is_XMMRegister()) { | |
1420 assert(!freg_destroyed[in_regs[i].first()->as_XMMRegister()->encoding()], "destroyed reg!"); | |
1421 } | |
1422 if (out_regs[c_arg].first()->is_Register()) { | |
1423 reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true; | |
1424 } else if (out_regs[c_arg].first()->is_XMMRegister()) { | |
1425 freg_destroyed[out_regs[c_arg].first()->as_XMMRegister()->encoding()] = true; | |
1426 } | |
1427 #endif /* ASSERT */ | |
1428 switch (in_sig_bt[i]) { | |
1429 case T_ARRAY: | |
1430 case T_OBJECT: | |
1431 object_move(masm, map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg], | |
1432 ((i == 0) && (!is_static)), | |
1433 &receiver_offset); | |
1434 break; | |
1435 case T_VOID: | |
1436 break; | |
1437 | |
1438 case T_FLOAT: | |
1439 float_move(masm, in_regs[i], out_regs[c_arg]); | |
1440 break; | |
1441 | |
1442 case T_DOUBLE: | |
1443 assert( i + 1 < total_in_args && | |
1444 in_sig_bt[i + 1] == T_VOID && | |
1445 out_sig_bt[c_arg+1] == T_VOID, "bad arg list"); | |
1446 double_move(masm, in_regs[i], out_regs[c_arg]); | |
1447 break; | |
1448 | |
1449 case T_LONG : | |
1450 long_move(masm, in_regs[i], out_regs[c_arg]); | |
1451 break; | |
1452 | |
1453 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); | |
1454 | |
1455 default: | |
1456 move32_64(masm, in_regs[i], out_regs[c_arg]); | |
1457 } | |
1458 } | |
1459 | |
1460 // point c_arg at the first arg that is already loaded in case we | |
1461 // need to spill before we call out | |
1462 c_arg++; | |
1463 | |
1464 // Pre-load a static method's oop into r14. Used both by locking code and | |
1465 // the normal JNI call code. | |
1466 if (method->is_static()) { | |
1467 | |
1468 // load oop into a register | |
1469 __ movoop(oop_handle_reg, JNIHandles::make_local(Klass::cast(method->method_holder())->java_mirror())); | |
1470 | |
1471 // Now handlize the static class mirror it's known not-null. | |
304 | 1472 __ movptr(Address(rsp, klass_offset), oop_handle_reg); |
0 | 1473 map->set_oop(VMRegImpl::stack2reg(klass_slot_offset)); |
1474 | |
1475 // Now get the handle | |
304 | 1476 __ lea(oop_handle_reg, Address(rsp, klass_offset)); |
0 | 1477 // store the klass handle as second argument |
304 | 1478 __ movptr(c_rarg1, oop_handle_reg); |
0 | 1479 // and protect the arg if we must spill |
1480 c_arg--; | |
1481 } | |
1482 | |
1483 // Change state to native (we save the return address in the thread, since it might not | |
1484 // be pushed on the stack when we do a a stack traversal). It is enough that the pc() | |
1485 // points into the right code segment. It does not have to be the correct return pc. | |
1486 // We use the same pc/oopMap repeatedly when we call out | |
1487 | |
1488 intptr_t the_pc = (intptr_t) __ pc(); | |
1489 oop_maps->add_gc_map(the_pc - start, map); | |
1490 | |
1491 __ set_last_Java_frame(rsp, noreg, (address)the_pc); | |
1492 | |
1493 | |
1494 // We have all of the arguments setup at this point. We must not touch any register | |
1495 // argument registers at this point (what if we save/restore them there are no oop? | |
1496 | |
1497 { | |
1498 SkipIfEqual skip(masm, &DTraceMethodProbes, false); | |
1499 // protect the args we've loaded | |
1500 save_args(masm, total_c_args, c_arg, out_regs); | |
1501 __ movoop(c_rarg1, JNIHandles::make_local(method())); | |
1502 __ call_VM_leaf( | |
1503 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
1504 r15_thread, c_rarg1); | |
1505 restore_args(masm, total_c_args, c_arg, out_regs); | |
1506 } | |
1507 | |
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1508 // RedefineClasses() tracing support for obsolete method entry |
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1509 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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1510 // protect the args we've loaded |
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1511 save_args(masm, total_c_args, c_arg, out_regs); |
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1512 __ movoop(c_rarg1, JNIHandles::make_local(method())); |
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1513 __ call_VM_leaf( |
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1514 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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1515 r15_thread, c_rarg1); |
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1516 restore_args(masm, total_c_args, c_arg, out_regs); |
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1517 } |
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1518 |
0 | 1519 // Lock a synchronized method |
1520 | |
1521 // Register definitions used by locking and unlocking | |
1522 | |
1523 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
1524 const Register obj_reg = rbx; // Will contain the oop | |
1525 const Register lock_reg = r13; // Address of compiler lock object (BasicLock) | |
1526 const Register old_hdr = r13; // value of old header at unlock time | |
1527 | |
1528 Label slow_path_lock; | |
1529 Label lock_done; | |
1530 | |
1531 if (method->is_synchronized()) { | |
1532 | |
1533 | |
1534 const int mark_word_offset = BasicLock::displaced_header_offset_in_bytes(); | |
1535 | |
1536 // Get the handle (the 2nd argument) | |
304 | 1537 __ mov(oop_handle_reg, c_rarg1); |
0 | 1538 |
1539 // Get address of the box | |
1540 | |
304 | 1541 __ lea(lock_reg, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
0 | 1542 |
1543 // Load the oop from the handle | |
304 | 1544 __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
0 | 1545 |
1546 if (UseBiasedLocking) { | |
1547 __ biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, lock_done, &slow_path_lock); | |
1548 } | |
1549 | |
1550 // Load immediate 1 into swap_reg %rax | |
1551 __ movl(swap_reg, 1); | |
1552 | |
1553 // Load (object->mark() | 1) into swap_reg %rax | |
304 | 1554 __ orptr(swap_reg, Address(obj_reg, 0)); |
0 | 1555 |
1556 // Save (object->mark() | 1) into BasicLock's displaced header | |
304 | 1557 __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
0 | 1558 |
1559 if (os::is_MP()) { | |
1560 __ lock(); | |
1561 } | |
1562 | |
1563 // src -> dest iff dest == rax else rax <- dest | |
304 | 1564 __ cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
0 | 1565 __ jcc(Assembler::equal, lock_done); |
1566 | |
1567 // Hmm should this move to the slow path code area??? | |
1568 | |
1569 // Test if the oopMark is an obvious stack pointer, i.e., | |
1570 // 1) (mark & 3) == 0, and | |
1571 // 2) rsp <= mark < mark + os::pagesize() | |
1572 // These 3 tests can be done by evaluating the following | |
1573 // expression: ((mark - rsp) & (3 - os::vm_page_size())), | |
1574 // assuming both stack pointer and pagesize have their | |
1575 // least significant 2 bits clear. | |
1576 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg | |
1577 | |
304 | 1578 __ subptr(swap_reg, rsp); |
1579 __ andptr(swap_reg, 3 - os::vm_page_size()); | |
0 | 1580 |
1581 // Save the test result, for recursive case, the result is zero | |
304 | 1582 __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
0 | 1583 __ jcc(Assembler::notEqual, slow_path_lock); |
1584 | |
1585 // Slow path will re-enter here | |
1586 | |
1587 __ bind(lock_done); | |
1588 } | |
1589 | |
1590 | |
1591 // Finally just about ready to make the JNI call | |
1592 | |
1593 | |
1594 // get JNIEnv* which is first argument to native | |
1595 | |
304 | 1596 __ lea(c_rarg0, Address(r15_thread, in_bytes(JavaThread::jni_environment_offset()))); |
0 | 1597 |
1598 // Now set thread in native | |
304 | 1599 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_native); |
0 | 1600 |
1601 __ call(RuntimeAddress(method->native_function())); | |
1602 | |
1603 // Either restore the MXCSR register after returning from the JNI Call | |
1604 // or verify that it wasn't changed. | |
1605 if (RestoreMXCSROnJNICalls) { | |
304 | 1606 __ ldmxcsr(ExternalAddress(StubRoutines::x86::mxcsr_std())); |
0 | 1607 |
1608 } | |
1609 else if (CheckJNICalls ) { | |
304 | 1610 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::verify_mxcsr_entry()))); |
0 | 1611 } |
1612 | |
1613 | |
1614 // Unpack native results. | |
1615 switch (ret_type) { | |
1616 case T_BOOLEAN: __ c2bool(rax); break; | |
1617 case T_CHAR : __ movzwl(rax, rax); break; | |
1618 case T_BYTE : __ sign_extend_byte (rax); break; | |
1619 case T_SHORT : __ sign_extend_short(rax); break; | |
1620 case T_INT : /* nothing to do */ break; | |
1621 case T_DOUBLE : | |
1622 case T_FLOAT : | |
1623 // Result is in xmm0 we'll save as needed | |
1624 break; | |
1625 case T_ARRAY: // Really a handle | |
1626 case T_OBJECT: // Really a handle | |
1627 break; // can't de-handlize until after safepoint check | |
1628 case T_VOID: break; | |
1629 case T_LONG: break; | |
1630 default : ShouldNotReachHere(); | |
1631 } | |
1632 | |
1633 // Switch thread to "native transition" state before reading the synchronization state. | |
1634 // This additional state is necessary because reading and testing the synchronization | |
1635 // state is not atomic w.r.t. GC, as this scenario demonstrates: | |
1636 // Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted. | |
1637 // VM thread changes sync state to synchronizing and suspends threads for GC. | |
1638 // Thread A is resumed to finish this native method, but doesn't block here since it | |
1639 // didn't see any synchronization is progress, and escapes. | |
304 | 1640 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_native_trans); |
0 | 1641 |
1642 if(os::is_MP()) { | |
1643 if (UseMembar) { | |
1644 // Force this write out before the read below | |
1645 __ membar(Assembler::Membar_mask_bits( | |
1646 Assembler::LoadLoad | Assembler::LoadStore | | |
1647 Assembler::StoreLoad | Assembler::StoreStore)); | |
1648 } else { | |
1649 // Write serialization page so VM thread can do a pseudo remote membar. | |
1650 // We use the current thread pointer to calculate a thread specific | |
1651 // offset to write to within the page. This minimizes bus traffic | |
1652 // due to cache line collision. | |
1653 __ serialize_memory(r15_thread, rcx); | |
1654 } | |
1655 } | |
1656 | |
1657 | |
1658 // check for safepoint operation in progress and/or pending suspend requests | |
1659 { | |
1660 Label Continue; | |
1661 | |
1662 __ cmp32(ExternalAddress((address)SafepointSynchronize::address_of_state()), | |
1663 SafepointSynchronize::_not_synchronized); | |
1664 | |
1665 Label L; | |
1666 __ jcc(Assembler::notEqual, L); | |
1667 __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0); | |
1668 __ jcc(Assembler::equal, Continue); | |
1669 __ bind(L); | |
1670 | |
1671 // Don't use call_VM as it will see a possible pending exception and forward it | |
1672 // and never return here preventing us from clearing _last_native_pc down below. | |
1673 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are | |
1674 // preserved and correspond to the bcp/locals pointers. So we do a runtime call | |
1675 // by hand. | |
1676 // | |
1677 save_native_result(masm, ret_type, stack_slots); | |
304 | 1678 __ mov(c_rarg0, r15_thread); |
1679 __ mov(r12, rsp); // remember sp | |
1680 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
1681 __ andptr(rsp, -16); // align stack as required by ABI | |
0 | 1682 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans))); |
304 | 1683 __ mov(rsp, r12); // restore sp |
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1684 __ reinit_heapbase(); |
0 | 1685 // Restore any method result value |
1686 restore_native_result(masm, ret_type, stack_slots); | |
1687 __ bind(Continue); | |
1688 } | |
1689 | |
1690 // change thread state | |
1691 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_Java); | |
1692 | |
1693 Label reguard; | |
1694 Label reguard_done; | |
1695 __ cmpl(Address(r15_thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled); | |
1696 __ jcc(Assembler::equal, reguard); | |
1697 __ bind(reguard_done); | |
1698 | |
1699 // native result if any is live | |
1700 | |
1701 // Unlock | |
1702 Label unlock_done; | |
1703 Label slow_path_unlock; | |
1704 if (method->is_synchronized()) { | |
1705 | |
1706 // Get locked oop from the handle we passed to jni | |
304 | 1707 __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
0 | 1708 |
1709 Label done; | |
1710 | |
1711 if (UseBiasedLocking) { | |
1712 __ biased_locking_exit(obj_reg, old_hdr, done); | |
1713 } | |
1714 | |
1715 // Simple recursive lock? | |
1716 | |
304 | 1717 __ cmpptr(Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size), (int32_t)NULL_WORD); |
0 | 1718 __ jcc(Assembler::equal, done); |
1719 | |
1720 // Must save rax if if it is live now because cmpxchg must use it | |
1721 if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { | |
1722 save_native_result(masm, ret_type, stack_slots); | |
1723 } | |
1724 | |
1725 | |
1726 // get address of the stack lock | |
304 | 1727 __ lea(rax, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
0 | 1728 // get old displaced header |
304 | 1729 __ movptr(old_hdr, Address(rax, 0)); |
0 | 1730 |
1731 // Atomic swap old header if oop still contains the stack lock | |
1732 if (os::is_MP()) { | |
1733 __ lock(); | |
1734 } | |
304 | 1735 __ cmpxchgptr(old_hdr, Address(obj_reg, 0)); |
0 | 1736 __ jcc(Assembler::notEqual, slow_path_unlock); |
1737 | |
1738 // slow path re-enters here | |
1739 __ bind(unlock_done); | |
1740 if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { | |
1741 restore_native_result(masm, ret_type, stack_slots); | |
1742 } | |
1743 | |
1744 __ bind(done); | |
1745 | |
1746 } | |
1747 { | |
1748 SkipIfEqual skip(masm, &DTraceMethodProbes, false); | |
1749 save_native_result(masm, ret_type, stack_slots); | |
1750 __ movoop(c_rarg1, JNIHandles::make_local(method())); | |
1751 __ call_VM_leaf( | |
1752 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
1753 r15_thread, c_rarg1); | |
1754 restore_native_result(masm, ret_type, stack_slots); | |
1755 } | |
1756 | |
1757 __ reset_last_Java_frame(false, true); | |
1758 | |
1759 // Unpack oop result | |
1760 if (ret_type == T_OBJECT || ret_type == T_ARRAY) { | |
1761 Label L; | |
304 | 1762 __ testptr(rax, rax); |
0 | 1763 __ jcc(Assembler::zero, L); |
304 | 1764 __ movptr(rax, Address(rax, 0)); |
0 | 1765 __ bind(L); |
1766 __ verify_oop(rax); | |
1767 } | |
1768 | |
1769 // reset handle block | |
304 | 1770 __ movptr(rcx, Address(r15_thread, JavaThread::active_handles_offset())); |
1771 __ movptr(Address(rcx, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD); | |
0 | 1772 |
1773 // pop our frame | |
1774 | |
1775 __ leave(); | |
1776 | |
1777 // Any exception pending? | |
304 | 1778 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
0 | 1779 __ jcc(Assembler::notEqual, exception_pending); |
1780 | |
1781 // Return | |
1782 | |
1783 __ ret(0); | |
1784 | |
1785 // Unexpected paths are out of line and go here | |
1786 | |
1787 // forward the exception | |
1788 __ bind(exception_pending); | |
1789 | |
1790 // and forward the exception | |
1791 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
1792 | |
1793 | |
1794 // Slow path locking & unlocking | |
1795 if (method->is_synchronized()) { | |
1796 | |
1797 // BEGIN Slow path lock | |
1798 __ bind(slow_path_lock); | |
1799 | |
1800 // has last_Java_frame setup. No exceptions so do vanilla call not call_VM | |
1801 // args are (oop obj, BasicLock* lock, JavaThread* thread) | |
1802 | |
1803 // protect the args we've loaded | |
1804 save_args(masm, total_c_args, c_arg, out_regs); | |
1805 | |
304 | 1806 __ mov(c_rarg0, obj_reg); |
1807 __ mov(c_rarg1, lock_reg); | |
1808 __ mov(c_rarg2, r15_thread); | |
0 | 1809 |
1810 // Not a leaf but we have last_Java_frame setup as we want | |
1811 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_locking_C), 3); | |
1812 restore_args(masm, total_c_args, c_arg, out_regs); | |
1813 | |
1814 #ifdef ASSERT | |
1815 { Label L; | |
304 | 1816 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
0 | 1817 __ jcc(Assembler::equal, L); |
1818 __ stop("no pending exception allowed on exit from monitorenter"); | |
1819 __ bind(L); | |
1820 } | |
1821 #endif | |
1822 __ jmp(lock_done); | |
1823 | |
1824 // END Slow path lock | |
1825 | |
1826 // BEGIN Slow path unlock | |
1827 __ bind(slow_path_unlock); | |
1828 | |
1829 // If we haven't already saved the native result we must save it now as xmm registers | |
1830 // are still exposed. | |
1831 | |
1832 if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { | |
1833 save_native_result(masm, ret_type, stack_slots); | |
1834 } | |
1835 | |
304 | 1836 __ lea(c_rarg1, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
1837 | |
1838 __ mov(c_rarg0, obj_reg); | |
1839 __ mov(r12, rsp); // remember sp | |
1840 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
1841 __ andptr(rsp, -16); // align stack as required by ABI | |
0 | 1842 |
1843 // Save pending exception around call to VM (which contains an EXCEPTION_MARK) | |
1844 // NOTE that obj_reg == rbx currently | |
304 | 1845 __ movptr(rbx, Address(r15_thread, in_bytes(Thread::pending_exception_offset()))); |
1846 __ movptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); | |
0 | 1847 |
1848 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_unlocking_C))); | |
304 | 1849 __ mov(rsp, r12); // restore sp |
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1850 __ reinit_heapbase(); |
0 | 1851 #ifdef ASSERT |
1852 { | |
1853 Label L; | |
304 | 1854 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int)NULL_WORD); |
0 | 1855 __ jcc(Assembler::equal, L); |
1856 __ stop("no pending exception allowed on exit complete_monitor_unlocking_C"); | |
1857 __ bind(L); | |
1858 } | |
1859 #endif /* ASSERT */ | |
1860 | |
304 | 1861 __ movptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), rbx); |
0 | 1862 |
1863 if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { | |
1864 restore_native_result(masm, ret_type, stack_slots); | |
1865 } | |
1866 __ jmp(unlock_done); | |
1867 | |
1868 // END Slow path unlock | |
1869 | |
1870 } // synchronized | |
1871 | |
1872 // SLOW PATH Reguard the stack if needed | |
1873 | |
1874 __ bind(reguard); | |
1875 save_native_result(masm, ret_type, stack_slots); | |
304 | 1876 __ mov(r12, rsp); // remember sp |
1877 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
1878 __ andptr(rsp, -16); // align stack as required by ABI | |
0 | 1879 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); |
304 | 1880 __ mov(rsp, r12); // restore sp |
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1881 __ reinit_heapbase(); |
0 | 1882 restore_native_result(masm, ret_type, stack_slots); |
1883 // and continue | |
1884 __ jmp(reguard_done); | |
1885 | |
1886 | |
1887 | |
1888 __ flush(); | |
1889 | |
1890 nmethod *nm = nmethod::new_native_nmethod(method, | |
1891 masm->code(), | |
1892 vep_offset, | |
1893 frame_complete, | |
1894 stack_slots / VMRegImpl::slots_per_word, | |
1895 (is_static ? in_ByteSize(klass_offset) : in_ByteSize(receiver_offset)), | |
1896 in_ByteSize(lock_slot_offset*VMRegImpl::stack_slot_size), | |
1897 oop_maps); | |
1898 return nm; | |
1899 | |
1900 } | |
1901 | |
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1902 #ifdef HAVE_DTRACE_H |
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1903 // --------------------------------------------------------------------------- |
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1904 // Generate a dtrace nmethod for a given signature. The method takes arguments |
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1905 // in the Java compiled code convention, marshals them to the native |
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1906 // abi and then leaves nops at the position you would expect to call a native |
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1907 // function. When the probe is enabled the nops are replaced with a trap |
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1908 // instruction that dtrace inserts and the trace will cause a notification |
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1909 // to dtrace. |
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1910 // |
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1911 // The probes are only able to take primitive types and java/lang/String as |
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1912 // arguments. No other java types are allowed. Strings are converted to utf8 |
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1913 // strings so that from dtrace point of view java strings are converted to C |
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1914 // strings. There is an arbitrary fixed limit on the total space that a method |
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1915 // can use for converting the strings. (256 chars per string in the signature). |
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1916 // So any java string larger then this is truncated. |
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1917 |
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1918 static int fp_offset[ConcreteRegisterImpl::number_of_registers] = { 0 }; |
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1919 static bool offsets_initialized = false; |
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1920 |
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1921 |
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1922 nmethod *SharedRuntime::generate_dtrace_nmethod(MacroAssembler *masm, |
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1923 methodHandle method) { |
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1924 |
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1925 |
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1926 // generate_dtrace_nmethod is guarded by a mutex so we are sure to |
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1927 // be single threaded in this method. |
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1928 assert(AdapterHandlerLibrary_lock->owned_by_self(), "must be"); |
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1929 |
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1930 if (!offsets_initialized) { |
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1931 fp_offset[c_rarg0->as_VMReg()->value()] = -1 * wordSize; |
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1932 fp_offset[c_rarg1->as_VMReg()->value()] = -2 * wordSize; |
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1933 fp_offset[c_rarg2->as_VMReg()->value()] = -3 * wordSize; |
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1934 fp_offset[c_rarg3->as_VMReg()->value()] = -4 * wordSize; |
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1935 fp_offset[c_rarg4->as_VMReg()->value()] = -5 * wordSize; |
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1936 fp_offset[c_rarg5->as_VMReg()->value()] = -6 * wordSize; |
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1937 |
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1938 fp_offset[c_farg0->as_VMReg()->value()] = -7 * wordSize; |
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1939 fp_offset[c_farg1->as_VMReg()->value()] = -8 * wordSize; |
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1940 fp_offset[c_farg2->as_VMReg()->value()] = -9 * wordSize; |
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1941 fp_offset[c_farg3->as_VMReg()->value()] = -10 * wordSize; |
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1942 fp_offset[c_farg4->as_VMReg()->value()] = -11 * wordSize; |
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1943 fp_offset[c_farg5->as_VMReg()->value()] = -12 * wordSize; |
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1944 fp_offset[c_farg6->as_VMReg()->value()] = -13 * wordSize; |
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1945 fp_offset[c_farg7->as_VMReg()->value()] = -14 * wordSize; |
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1946 |
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1947 offsets_initialized = true; |
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1948 } |
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1949 // Fill in the signature array, for the calling-convention call. |
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1950 int total_args_passed = method->size_of_parameters(); |
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1951 |
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1952 BasicType* in_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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1953 VMRegPair *in_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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1954 |
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1955 // The signature we are going to use for the trap that dtrace will see |
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1956 // java/lang/String is converted. We drop "this" and any other object |
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1957 // is converted to NULL. (A one-slot java/lang/Long object reference |
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1958 // is converted to a two-slot long, which is why we double the allocation). |
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1959 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed * 2); |
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1960 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed * 2); |
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1961 |
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1962 int i=0; |
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1963 int total_strings = 0; |
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1964 int first_arg_to_pass = 0; |
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1965 int total_c_args = 0; |
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1966 |
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1967 // Skip the receiver as dtrace doesn't want to see it |
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1968 if( !method->is_static() ) { |
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1969 in_sig_bt[i++] = T_OBJECT; |
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1970 first_arg_to_pass = 1; |
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1971 } |
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1972 |
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1973 // We need to convert the java args to where a native (non-jni) function |
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1974 // would expect them. To figure out where they go we convert the java |
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1975 // signature to a C signature. |
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1976 |
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1977 SignatureStream ss(method->signature()); |
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1978 for ( ; !ss.at_return_type(); ss.next()) { |
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1979 BasicType bt = ss.type(); |
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1980 in_sig_bt[i++] = bt; // Collect remaining bits of signature |
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1981 out_sig_bt[total_c_args++] = bt; |
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1982 if( bt == T_OBJECT) { |
2177
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1983 Symbol* s = ss.as_symbol_or_null(); // symbol is created |
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1984 if (s == vmSymbols::java_lang_String()) { |
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1985 total_strings++; |
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1986 out_sig_bt[total_c_args-1] = T_ADDRESS; |
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1987 } else if (s == vmSymbols::java_lang_Boolean() || |
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1988 s == vmSymbols::java_lang_Character() || |
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1989 s == vmSymbols::java_lang_Byte() || |
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1990 s == vmSymbols::java_lang_Short() || |
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1991 s == vmSymbols::java_lang_Integer() || |
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1992 s == vmSymbols::java_lang_Float()) { |
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1993 out_sig_bt[total_c_args-1] = T_INT; |
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1994 } else if (s == vmSymbols::java_lang_Long() || |
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1995 s == vmSymbols::java_lang_Double()) { |
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1996 out_sig_bt[total_c_args-1] = T_LONG; |
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1997 out_sig_bt[total_c_args++] = T_VOID; |
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1998 } |
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1999 } else if ( bt == T_LONG || bt == T_DOUBLE ) { |
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2000 in_sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2001 // We convert double to long |
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2002 out_sig_bt[total_c_args-1] = T_LONG; |
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2003 out_sig_bt[total_c_args++] = T_VOID; |
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2004 } else if ( bt == T_FLOAT) { |
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2005 // We convert float to int |
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2006 out_sig_bt[total_c_args-1] = T_INT; |
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2007 } |
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2008 } |
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2009 |
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2010 assert(i==total_args_passed, "validly parsed signature"); |
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2011 |
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2012 // Now get the compiled-Java layout as input arguments |
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2013 int comp_args_on_stack; |
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2014 comp_args_on_stack = SharedRuntime::java_calling_convention( |
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2015 in_sig_bt, in_regs, total_args_passed, false); |
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2016 |
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2017 // Now figure out where the args must be stored and how much stack space |
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2018 // they require (neglecting out_preserve_stack_slots but space for storing |
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2019 // the 1st six register arguments). It's weird see int_stk_helper. |
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2020 |
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2021 int out_arg_slots; |
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2022 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); |
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2023 |
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2024 // Calculate the total number of stack slots we will need. |
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2025 |
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2026 // First count the abi requirement plus all of the outgoing args |
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2027 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; |
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2028 |
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2029 // Now space for the string(s) we must convert |
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2030 int* string_locs = NEW_RESOURCE_ARRAY(int, total_strings + 1); |
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2031 for (i = 0; i < total_strings ; i++) { |
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2032 string_locs[i] = stack_slots; |
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2033 stack_slots += max_dtrace_string_size / VMRegImpl::stack_slot_size; |
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2034 } |
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2035 |
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2036 // Plus the temps we might need to juggle register args |
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2037 // regs take two slots each |
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2038 stack_slots += (Argument::n_int_register_parameters_c + |
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2039 Argument::n_float_register_parameters_c) * 2; |
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2040 |
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2041 |
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2042 // + 4 for return address (which we own) and saved rbp, |
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2043 |
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2044 stack_slots += 4; |
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2045 |
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2046 // Ok The space we have allocated will look like: |
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2047 // |
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2048 // |
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2049 // FP-> | | |
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2050 // |---------------------| |
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2051 // | string[n] | |
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2052 // |---------------------| <- string_locs[n] |
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2053 // | string[n-1] | |
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2054 // |---------------------| <- string_locs[n-1] |
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2055 // | ... | |
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2056 // | ... | |
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2057 // |---------------------| <- string_locs[1] |
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2058 // | string[0] | |
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2059 // |---------------------| <- string_locs[0] |
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2060 // | outbound memory | |
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2061 // | based arguments | |
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2062 // | | |
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2063 // |---------------------| |
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2064 // | | |
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2065 // SP-> | out_preserved_slots | |
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2066 // |
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2067 // |
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2068 |
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2069 // Now compute actual number of stack words we need rounding to make |
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2070 // stack properly aligned. |
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2071 stack_slots = round_to(stack_slots, 4 * VMRegImpl::slots_per_word); |
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2072 |
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2073 int stack_size = stack_slots * VMRegImpl::stack_slot_size; |
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2074 |
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2075 intptr_t start = (intptr_t)__ pc(); |
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2076 |
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2077 // First thing make an ic check to see if we should even be here |
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2078 |
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2079 // We are free to use all registers as temps without saving them and |
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2080 // restoring them except rbp. rbp, is the only callee save register |
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2081 // as far as the interpreter and the compiler(s) are concerned. |
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2082 |
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2083 const Register ic_reg = rax; |
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2084 const Register receiver = rcx; |
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2085 Label hit; |
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2086 Label exception_pending; |
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2087 |
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2088 |
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2089 __ verify_oop(receiver); |
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2090 __ cmpl(ic_reg, Address(receiver, oopDesc::klass_offset_in_bytes())); |
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2091 __ jcc(Assembler::equal, hit); |
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2092 |
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2093 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); |
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2094 |
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2095 // verified entry must be aligned for code patching. |
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2096 // and the first 5 bytes must be in the same cache line |
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2097 // if we align at 8 then we will be sure 5 bytes are in the same line |
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2098 __ align(8); |
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2099 |
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2100 __ bind(hit); |
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2101 |
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2102 int vep_offset = ((intptr_t)__ pc()) - start; |
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2103 |
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2104 |
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2105 // The instruction at the verified entry point must be 5 bytes or longer |
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2106 // because it can be patched on the fly by make_non_entrant. The stack bang |
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2107 // instruction fits that requirement. |
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2108 |
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2109 // Generate stack overflow check |
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2110 |
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2111 if (UseStackBanging) { |
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2112 if (stack_size <= StackShadowPages*os::vm_page_size()) { |
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2113 __ bang_stack_with_offset(StackShadowPages*os::vm_page_size()); |
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2114 } else { |
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2115 __ movl(rax, stack_size); |
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2116 __ bang_stack_size(rax, rbx); |
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2117 } |
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2118 } else { |
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2119 // need a 5 byte instruction to allow MT safe patching to non-entrant |
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2120 __ fat_nop(); |
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2121 } |
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2122 |
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2123 assert(((uintptr_t)__ pc() - start - vep_offset) >= 5, |
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2124 "valid size for make_non_entrant"); |
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2125 |
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2126 // Generate a new frame for the wrapper. |
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2127 __ enter(); |
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2128 |
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2129 // -4 because return address is already present and so is saved rbp, |
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2130 if (stack_size - 2*wordSize != 0) { |
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2131 __ subq(rsp, stack_size - 2*wordSize); |
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2132 } |
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2133 |
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2134 // Frame is now completed as far a size and linkage. |
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2135 |
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2136 int frame_complete = ((intptr_t)__ pc()) - start; |
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2137 |
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2138 int c_arg, j_arg; |
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2139 |
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2140 // State of input register args |
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2141 |
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2142 bool live[ConcreteRegisterImpl::number_of_registers]; |
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2143 |
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2144 live[j_rarg0->as_VMReg()->value()] = false; |
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2145 live[j_rarg1->as_VMReg()->value()] = false; |
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2146 live[j_rarg2->as_VMReg()->value()] = false; |
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2147 live[j_rarg3->as_VMReg()->value()] = false; |
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2148 live[j_rarg4->as_VMReg()->value()] = false; |
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2149 live[j_rarg5->as_VMReg()->value()] = false; |
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2150 |
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2151 live[j_farg0->as_VMReg()->value()] = false; |
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2152 live[j_farg1->as_VMReg()->value()] = false; |
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2153 live[j_farg2->as_VMReg()->value()] = false; |
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2154 live[j_farg3->as_VMReg()->value()] = false; |
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2155 live[j_farg4->as_VMReg()->value()] = false; |
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2156 live[j_farg5->as_VMReg()->value()] = false; |
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2157 live[j_farg6->as_VMReg()->value()] = false; |
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2158 live[j_farg7->as_VMReg()->value()] = false; |
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2159 |
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2160 |
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2161 bool rax_is_zero = false; |
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2162 |
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2163 // All args (except strings) destined for the stack are moved first |
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2164 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2165 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2166 VMRegPair src = in_regs[j_arg]; |
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2167 VMRegPair dst = out_regs[c_arg]; |
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2168 |
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2169 // Get the real reg value or a dummy (rsp) |
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2170 |
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2171 int src_reg = src.first()->is_reg() ? |
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2172 src.first()->value() : |
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2173 rsp->as_VMReg()->value(); |
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2174 |
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2175 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
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2176 (in_sig_bt[j_arg] == T_OBJECT && |
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2177 out_sig_bt[c_arg] != T_INT && |
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2178 out_sig_bt[c_arg] != T_ADDRESS && |
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2179 out_sig_bt[c_arg] != T_LONG); |
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2180 |
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2181 live[src_reg] = !useless; |
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2182 |
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2183 if (dst.first()->is_stack()) { |
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2184 |
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2185 // Even though a string arg in a register is still live after this loop |
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2186 // after the string conversion loop (next) it will be dead so we take |
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2187 // advantage of that now for simpler code to manage live. |
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2188 |
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2189 live[src_reg] = false; |
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2190 switch (in_sig_bt[j_arg]) { |
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2191 |
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2192 case T_ARRAY: |
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2193 case T_OBJECT: |
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2194 { |
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2195 Address stack_dst(rsp, reg2offset_out(dst.first())); |
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2196 |
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2197 if (out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
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2198 // need to unbox a one-word value |
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2199 Register in_reg = rax; |
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2200 if ( src.first()->is_reg() ) { |
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2201 in_reg = src.first()->as_Register(); |
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2202 } else { |
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2203 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); |
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2204 rax_is_zero = false; |
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2205 } |
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2206 Label skipUnbox; |
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2207 __ movptr(Address(rsp, reg2offset_out(dst.first())), |
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2208 (int32_t)NULL_WORD); |
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2209 __ testq(in_reg, in_reg); |
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2210 __ jcc(Assembler::zero, skipUnbox); |
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2211 |
165
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2212 BasicType bt = out_sig_bt[c_arg]; |
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2213 int box_offset = java_lang_boxing_object::value_offset_in_bytes(bt); |
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2214 Address src1(in_reg, box_offset); |
165
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2215 if ( bt == T_LONG ) { |
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2216 __ movq(in_reg, src1); |
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2217 __ movq(stack_dst, in_reg); |
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2218 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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2219 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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2220 } else { |
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2221 __ movl(in_reg, src1); |
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2222 __ movl(stack_dst, in_reg); |
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2223 } |
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2224 |
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2225 __ bind(skipUnbox); |
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2226 } else if (out_sig_bt[c_arg] != T_ADDRESS) { |
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2227 // Convert the arg to NULL |
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2228 if (!rax_is_zero) { |
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2229 __ xorq(rax, rax); |
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2230 rax_is_zero = true; |
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2231 } |
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2232 __ movq(stack_dst, rax); |
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2233 } |
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|
2234 } |
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|
2235 break; |
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|
2236 |
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|
2237 case T_VOID: |
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|
2238 break; |
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|
2239 |
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2240 case T_FLOAT: |
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2241 // This does the right thing since we know it is destined for the |
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2242 // stack |
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2243 float_move(masm, src, dst); |
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2244 break; |
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|
2245 |
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2246 case T_DOUBLE: |
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2247 // This does the right thing since we know it is destined for the |
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2248 // stack |
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2249 double_move(masm, src, dst); |
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|
2250 break; |
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|
2251 |
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2252 case T_LONG : |
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2253 long_move(masm, src, dst); |
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2254 break; |
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|
2255 |
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2256 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); |
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|
2257 |
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|
2258 default: |
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2259 move32_64(masm, src, dst); |
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|
2260 } |
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|
2261 } |
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|
2262 |
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|
2263 } |
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|
2264 |
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|
2265 // If we have any strings we must store any register based arg to the stack |
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2266 // This includes any still live xmm registers too. |
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|
2267 |
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|
2268 int sid = 0; |
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|
2269 |
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2270 if (total_strings > 0 ) { |
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2271 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2272 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2273 VMRegPair src = in_regs[j_arg]; |
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2274 VMRegPair dst = out_regs[c_arg]; |
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|
2275 |
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2276 if (src.first()->is_reg()) { |
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2277 Address src_tmp(rbp, fp_offset[src.first()->value()]); |
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|
2278 |
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2279 // string oops were left untouched by the previous loop even if the |
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2280 // eventual (converted) arg is destined for the stack so park them |
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2281 // away now (except for first) |
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|
2282 |
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2283 if (out_sig_bt[c_arg] == T_ADDRESS) { |
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2284 Address utf8_addr = Address( |
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2285 rsp, string_locs[sid++] * VMRegImpl::stack_slot_size); |
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2286 if (sid != 1) { |
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2287 // The first string arg won't be killed until after the utf8 |
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|
2288 // conversion |
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|
2289 __ movq(utf8_addr, src.first()->as_Register()); |
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|
2290 } |
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|
2291 } else if (dst.first()->is_reg()) { |
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2292 if (in_sig_bt[j_arg] == T_FLOAT || in_sig_bt[j_arg] == T_DOUBLE) { |
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|
2293 |
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|
2294 // Convert the xmm register to an int and store it in the reserved |
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2295 // location for the eventual c register arg |
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2296 XMMRegister f = src.first()->as_XMMRegister(); |
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2297 if (in_sig_bt[j_arg] == T_FLOAT) { |
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2298 __ movflt(src_tmp, f); |
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|
2299 } else { |
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|
2300 __ movdbl(src_tmp, f); |
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|
2301 } |
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|
2302 } else { |
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|
2303 // If the arg is an oop type we don't support don't bother to store |
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2304 // it remember string was handled above. |
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|
2305 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
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2306 (in_sig_bt[j_arg] == T_OBJECT && |
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|
2307 out_sig_bt[c_arg] != T_INT && |
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|
2308 out_sig_bt[c_arg] != T_LONG); |
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|
2309 |
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|
2310 if (!useless) { |
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2311 __ movq(src_tmp, src.first()->as_Register()); |
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|
2312 } |
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|
2313 } |
018d5b58dd4f
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|
2314 } |
018d5b58dd4f
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|
2315 } |
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|
2316 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
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2317 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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2318 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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|
2319 } |
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|
2320 } |
018d5b58dd4f
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|
2321 |
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|
2322 // Now that the volatile registers are safe, convert all the strings |
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|
2323 sid = 0; |
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|
2324 |
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|
2325 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2326 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2327 if (out_sig_bt[c_arg] == T_ADDRESS) { |
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|
2328 // It's a string |
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|
2329 Address utf8_addr = Address( |
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|
2330 rsp, string_locs[sid++] * VMRegImpl::stack_slot_size); |
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2331 // The first string we find might still be in the original java arg |
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|
2332 // register |
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|
2333 |
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2334 VMReg src = in_regs[j_arg].first(); |
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|
2335 |
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|
2336 // We will need to eventually save the final argument to the trap |
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2337 // in the von-volatile location dedicated to src. This is the offset |
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2338 // from fp we will use. |
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2339 int src_off = src->is_reg() ? |
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2340 fp_offset[src->value()] : reg2offset_in(src); |
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|
2341 |
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|
2342 // This is where the argument will eventually reside |
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2343 VMRegPair dst = out_regs[c_arg]; |
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|
2344 |
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2345 if (src->is_reg()) { |
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2346 if (sid == 1) { |
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2347 __ movq(c_rarg0, src->as_Register()); |
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|
2348 } else { |
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2349 __ movq(c_rarg0, utf8_addr); |
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|
2350 } |
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|
2351 } else { |
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2352 // arg is still in the original location |
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|
2353 __ movq(c_rarg0, Address(rbp, reg2offset_in(src))); |
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2354 } |
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2355 Label done, convert; |
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2356 |
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2357 // see if the oop is NULL |
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2358 __ testq(c_rarg0, c_rarg0); |
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2359 __ jcc(Assembler::notEqual, convert); |
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2360 |
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2361 if (dst.first()->is_reg()) { |
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2362 // Save the ptr to utf string in the origina src loc or the tmp |
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2363 // dedicated to it |
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2364 __ movq(Address(rbp, src_off), c_rarg0); |
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2365 } else { |
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2366 __ movq(Address(rsp, reg2offset_out(dst.first())), c_rarg0); |
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2367 } |
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2368 __ jmp(done); |
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2369 |
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2370 __ bind(convert); |
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2371 |
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2372 __ lea(c_rarg1, utf8_addr); |
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2373 if (dst.first()->is_reg()) { |
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2374 __ movq(Address(rbp, src_off), c_rarg1); |
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2375 } else { |
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2376 __ movq(Address(rsp, reg2offset_out(dst.first())), c_rarg1); |
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2377 } |
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2378 // And do the conversion |
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2379 __ call(RuntimeAddress( |
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2380 CAST_FROM_FN_PTR(address, SharedRuntime::get_utf))); |
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2381 |
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2382 __ bind(done); |
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2383 } |
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2384 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
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2385 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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2386 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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2387 } |
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2388 } |
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2389 // The get_utf call killed all the c_arg registers |
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2390 live[c_rarg0->as_VMReg()->value()] = false; |
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2391 live[c_rarg1->as_VMReg()->value()] = false; |
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2392 live[c_rarg2->as_VMReg()->value()] = false; |
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2393 live[c_rarg3->as_VMReg()->value()] = false; |
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2394 live[c_rarg4->as_VMReg()->value()] = false; |
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2395 live[c_rarg5->as_VMReg()->value()] = false; |
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2396 |
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2397 live[c_farg0->as_VMReg()->value()] = false; |
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2398 live[c_farg1->as_VMReg()->value()] = false; |
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2399 live[c_farg2->as_VMReg()->value()] = false; |
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2400 live[c_farg3->as_VMReg()->value()] = false; |
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2401 live[c_farg4->as_VMReg()->value()] = false; |
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2402 live[c_farg5->as_VMReg()->value()] = false; |
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2403 live[c_farg6->as_VMReg()->value()] = false; |
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2404 live[c_farg7->as_VMReg()->value()] = false; |
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2405 } |
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2406 |
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2407 // Now we can finally move the register args to their desired locations |
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2408 |
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2409 rax_is_zero = false; |
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2410 |
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2411 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2412 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2413 |
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2414 VMRegPair src = in_regs[j_arg]; |
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2415 VMRegPair dst = out_regs[c_arg]; |
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2416 |
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2417 // Only need to look for args destined for the interger registers (since we |
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2418 // convert float/double args to look like int/long outbound) |
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2419 if (dst.first()->is_reg()) { |
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2420 Register r = dst.first()->as_Register(); |
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2421 |
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2422 // Check if the java arg is unsupported and thereofre useless |
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2423 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
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2424 (in_sig_bt[j_arg] == T_OBJECT && |
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2425 out_sig_bt[c_arg] != T_INT && |
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2426 out_sig_bt[c_arg] != T_ADDRESS && |
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2427 out_sig_bt[c_arg] != T_LONG); |
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2428 |
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|
2429 |
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2430 // If we're going to kill an existing arg save it first |
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2431 if (live[dst.first()->value()]) { |
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2432 // you can't kill yourself |
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2433 if (src.first() != dst.first()) { |
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2434 __ movq(Address(rbp, fp_offset[dst.first()->value()]), r); |
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2435 } |
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|
2436 } |
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2437 if (src.first()->is_reg()) { |
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2438 if (live[src.first()->value()] ) { |
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2439 if (in_sig_bt[j_arg] == T_FLOAT) { |
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2440 __ movdl(r, src.first()->as_XMMRegister()); |
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2441 } else if (in_sig_bt[j_arg] == T_DOUBLE) { |
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2442 __ movdq(r, src.first()->as_XMMRegister()); |
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2443 } else if (r != src.first()->as_Register()) { |
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2444 if (!useless) { |
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2445 __ movq(r, src.first()->as_Register()); |
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2446 } |
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|
2447 } |
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|
2448 } else { |
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2449 // If the arg is an oop type we don't support don't bother to store |
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2450 // it |
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2451 if (!useless) { |
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2452 if (in_sig_bt[j_arg] == T_DOUBLE || |
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2453 in_sig_bt[j_arg] == T_LONG || |
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2454 in_sig_bt[j_arg] == T_OBJECT ) { |
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2455 __ movq(r, Address(rbp, fp_offset[src.first()->value()])); |
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2456 } else { |
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2457 __ movl(r, Address(rbp, fp_offset[src.first()->value()])); |
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2458 } |
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|
2459 } |
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|
2460 } |
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|
2461 live[src.first()->value()] = false; |
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2462 } else if (!useless) { |
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2463 // full sized move even for int should be ok |
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2464 __ movq(r, Address(rbp, reg2offset_in(src.first()))); |
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2465 } |
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|
2466 |
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2467 // At this point r has the original java arg in the final location |
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2468 // (assuming it wasn't useless). If the java arg was an oop |
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2469 // we have a bit more to do |
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2470 |
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2471 if (in_sig_bt[j_arg] == T_ARRAY || in_sig_bt[j_arg] == T_OBJECT ) { |
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2472 if (out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
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2473 // need to unbox a one-word value |
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2474 Label skip; |
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2475 __ testq(r, r); |
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2476 __ jcc(Assembler::equal, skip); |
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2477 BasicType bt = out_sig_bt[c_arg]; |
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2478 int box_offset = java_lang_boxing_object::value_offset_in_bytes(bt); |
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2479 Address src1(r, box_offset); |
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2480 if ( bt == T_LONG ) { |
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2481 __ movq(r, src1); |
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2482 } else { |
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2483 __ movl(r, src1); |
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2484 } |
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2485 __ bind(skip); |
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2486 |
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2487 } else if (out_sig_bt[c_arg] != T_ADDRESS) { |
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2488 // Convert the arg to NULL |
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2489 __ xorq(r, r); |
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2490 } |
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2491 } |
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2492 |
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2493 // dst can longer be holding an input value |
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2494 live[dst.first()->value()] = false; |
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2495 } |
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2496 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
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2497 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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2498 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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2499 } |
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2500 } |
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2501 |
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2502 |
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2503 // Ok now we are done. Need to place the nop that dtrace wants in order to |
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2504 // patch in the trap |
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2505 int patch_offset = ((intptr_t)__ pc()) - start; |
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2506 |
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2507 __ nop(); |
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2508 |
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2509 |
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2510 // Return |
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2511 |
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2512 __ leave(); |
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2513 __ ret(0); |
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2514 |
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2515 __ flush(); |
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2516 |
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2517 nmethod *nm = nmethod::new_dtrace_nmethod( |
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2518 method, masm->code(), vep_offset, patch_offset, frame_complete, |
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2519 stack_slots / VMRegImpl::slots_per_word); |
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2520 return nm; |
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2521 |
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2522 } |
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2523 |
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2524 #endif // HAVE_DTRACE_H |
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2525 |
0 | 2526 // this function returns the adjust size (in number of words) to a c2i adapter |
2527 // activation for use during deoptimization | |
2528 int Deoptimization::last_frame_adjust(int callee_parameters, int callee_locals ) { | |
1506 | 2529 return (callee_locals - callee_parameters) * Interpreter::stackElementWords; |
0 | 2530 } |
2531 | |
2532 | |
2533 uint SharedRuntime::out_preserve_stack_slots() { | |
2534 return 0; | |
2535 } | |
2536 | |
2537 | |
2538 //------------------------------generate_deopt_blob---------------------------- | |
2539 void SharedRuntime::generate_deopt_blob() { | |
2540 // Allocate space for the code | |
2541 ResourceMark rm; | |
2542 // Setup code generation tools | |
2543 CodeBuffer buffer("deopt_blob", 2048, 1024); | |
2544 MacroAssembler* masm = new MacroAssembler(&buffer); | |
2545 int frame_size_in_words; | |
2546 OopMap* map = NULL; | |
2547 OopMapSet *oop_maps = new OopMapSet(); | |
2548 | |
2549 // ------------- | |
2550 // This code enters when returning to a de-optimized nmethod. A return | |
2551 // address has been pushed on the the stack, and return values are in | |
2552 // registers. | |
2553 // If we are doing a normal deopt then we were called from the patched | |
2554 // nmethod from the point we returned to the nmethod. So the return | |
2555 // address on the stack is wrong by NativeCall::instruction_size | |
2556 // We will adjust the value so it looks like we have the original return | |
2557 // address on the stack (like when we eagerly deoptimized). | |
2558 // In the case of an exception pending when deoptimizing, we enter | |
2559 // with a return address on the stack that points after the call we patched | |
2560 // into the exception handler. We have the following register state from, | |
2561 // e.g., the forward exception stub (see stubGenerator_x86_64.cpp). | |
2562 // rax: exception oop | |
2563 // rbx: exception handler | |
2564 // rdx: throwing pc | |
2565 // So in this case we simply jam rdx into the useless return address and | |
2566 // the stack looks just like we want. | |
2567 // | |
2568 // At this point we need to de-opt. We save the argument return | |
2569 // registers. We call the first C routine, fetch_unroll_info(). This | |
2570 // routine captures the return values and returns a structure which | |
2571 // describes the current frame size and the sizes of all replacement frames. | |
2572 // The current frame is compiled code and may contain many inlined | |
2573 // functions, each with their own JVM state. We pop the current frame, then | |
2574 // push all the new frames. Then we call the C routine unpack_frames() to | |
2575 // populate these frames. Finally unpack_frames() returns us the new target | |
2576 // address. Notice that callee-save registers are BLOWN here; they have | |
2577 // already been captured in the vframeArray at the time the return PC was | |
2578 // patched. | |
2579 address start = __ pc(); | |
2580 Label cont; | |
2581 | |
2582 // Prolog for non exception case! | |
2583 | |
2584 // Save everything in sight. | |
2585 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
2586 | |
2587 // Normal deoptimization. Save exec mode for unpack_frames. | |
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2588 __ movl(r14, Deoptimization::Unpack_deopt); // callee-saved |
0 | 2589 __ jmp(cont); |
304 | 2590 |
2591 int reexecute_offset = __ pc() - start; | |
2592 | |
2593 // Reexecute case | |
2594 // return address is the pc describes what bci to do re-execute at | |
2595 | |
2596 // No need to update map as each call to save_live_registers will produce identical oopmap | |
2597 (void) RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
2598 | |
2599 __ movl(r14, Deoptimization::Unpack_reexecute); // callee-saved | |
2600 __ jmp(cont); | |
2601 | |
0 | 2602 int exception_offset = __ pc() - start; |
2603 | |
2604 // Prolog for exception case | |
2605 | |
304 | 2606 // all registers are dead at this entry point, except for rax, and |
2607 // rdx which contain the exception oop and exception pc | |
2608 // respectively. Set them in TLS and fall thru to the | |
2609 // unpack_with_exception_in_tls entry point. | |
2610 | |
2611 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), rdx); | |
2612 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), rax); | |
2613 | |
2614 int exception_in_tls_offset = __ pc() - start; | |
2615 | |
2616 // new implementation because exception oop is now passed in JavaThread | |
2617 | |
2618 // Prolog for exception case | |
2619 // All registers must be preserved because they might be used by LinearScan | |
2620 // Exceptiop oop and throwing PC are passed in JavaThread | |
2621 // tos: stack at point of call to method that threw the exception (i.e. only | |
2622 // args are on the stack, no return address) | |
2623 | |
2624 // make room on stack for the return address | |
2625 // It will be patched later with the throwing pc. The correct value is not | |
2626 // available now because loading it from memory would destroy registers. | |
2627 __ push(0); | |
0 | 2628 |
2629 // Save everything in sight. | |
2630 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
2631 | |
304 | 2632 // Now it is safe to overwrite any register |
2633 | |
0 | 2634 // Deopt during an exception. Save exec mode for unpack_frames. |
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2635 __ movl(r14, Deoptimization::Unpack_exception); // callee-saved |
0 | 2636 |
304 | 2637 // load throwing pc from JavaThread and patch it as the return address |
2638 // of the current frame. Then clear the field in JavaThread | |
2639 | |
2640 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); | |
2641 __ movptr(Address(rbp, wordSize), rdx); | |
2642 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD); | |
2643 | |
2644 #ifdef ASSERT | |
2645 // verify that there is really an exception oop in JavaThread | |
2646 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); | |
2647 __ verify_oop(rax); | |
2648 | |
2649 // verify that there is no pending exception | |
2650 Label no_pending_exception; | |
2651 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset())); | |
2652 __ testptr(rax, rax); | |
2653 __ jcc(Assembler::zero, no_pending_exception); | |
2654 __ stop("must not have pending exception here"); | |
2655 __ bind(no_pending_exception); | |
2656 #endif | |
2657 | |
0 | 2658 __ bind(cont); |
2659 | |
2660 // Call C code. Need thread and this frame, but NOT official VM entry | |
2661 // crud. We cannot block on this call, no GC can happen. | |
2662 // | |
2663 // UnrollBlock* fetch_unroll_info(JavaThread* thread) | |
2664 | |
2665 // fetch_unroll_info needs to call last_java_frame(). | |
2666 | |
2667 __ set_last_Java_frame(noreg, noreg, NULL); | |
2668 #ifdef ASSERT | |
2669 { Label L; | |
304 | 2670 __ cmpptr(Address(r15_thread, |
0 | 2671 JavaThread::last_Java_fp_offset()), |
304 | 2672 (int32_t)0); |
0 | 2673 __ jcc(Assembler::equal, L); |
2674 __ stop("SharedRuntime::generate_deopt_blob: last_Java_fp not cleared"); | |
2675 __ bind(L); | |
2676 } | |
2677 #endif // ASSERT | |
304 | 2678 __ mov(c_rarg0, r15_thread); |
0 | 2679 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::fetch_unroll_info))); |
2680 | |
2681 // Need to have an oopmap that tells fetch_unroll_info where to | |
2682 // find any register it might need. | |
2683 oop_maps->add_gc_map(__ pc() - start, map); | |
2684 | |
2685 __ reset_last_Java_frame(false, false); | |
2686 | |
2687 // Load UnrollBlock* into rdi | |
304 | 2688 __ mov(rdi, rax); |
2689 | |
2690 Label noException; | |
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2691 __ cmpl(r14, Deoptimization::Unpack_exception); // Was exception pending? |
304 | 2692 __ jcc(Assembler::notEqual, noException); |
2693 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); | |
2694 // QQQ this is useless it was NULL above | |
2695 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); | |
2696 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD); | |
2697 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD); | |
2698 | |
2699 __ verify_oop(rax); | |
2700 | |
2701 // Overwrite the result registers with the exception results. | |
2702 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); | |
2703 // I think this is useless | |
2704 __ movptr(Address(rsp, RegisterSaver::rdx_offset_in_bytes()), rdx); | |
2705 | |
2706 __ bind(noException); | |
0 | 2707 |
2708 // Only register save data is on the stack. | |
2709 // Now restore the result registers. Everything else is either dead | |
2710 // or captured in the vframeArray. | |
2711 RegisterSaver::restore_result_registers(masm); | |
2712 | |
2713 // All of the register save area has been popped of the stack. Only the | |
2714 // return address remains. | |
2715 | |
2716 // Pop all the frames we must move/replace. | |
2717 // | |
2718 // Frame picture (youngest to oldest) | |
2719 // 1: self-frame (no frame link) | |
2720 // 2: deopting frame (no frame link) | |
2721 // 3: caller of deopting frame (could be compiled/interpreted). | |
2722 // | |
2723 // Note: by leaving the return address of self-frame on the stack | |
2724 // and using the size of frame 2 to adjust the stack | |
2725 // when we are done the return to frame 3 will still be on the stack. | |
2726 | |
2727 // Pop deoptimized frame | |
2728 __ movl(rcx, Address(rdi, Deoptimization::UnrollBlock::size_of_deoptimized_frame_offset_in_bytes())); | |
304 | 2729 __ addptr(rsp, rcx); |
0 | 2730 |
2731 // rsp should be pointing at the return address to the caller (3) | |
2732 | |
2733 // Stack bang to make sure there's enough room for these interpreter frames. | |
2734 if (UseStackBanging) { | |
2735 __ movl(rbx, Address(rdi, Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); | |
2736 __ bang_stack_size(rbx, rcx); | |
2737 } | |
2738 | |
2739 // Load address of array of frame pcs into rcx | |
304 | 2740 __ movptr(rcx, Address(rdi, Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); |
0 | 2741 |
2742 // Trash the old pc | |
304 | 2743 __ addptr(rsp, wordSize); |
0 | 2744 |
2745 // Load address of array of frame sizes into rsi | |
304 | 2746 __ movptr(rsi, Address(rdi, Deoptimization::UnrollBlock::frame_sizes_offset_in_bytes())); |
0 | 2747 |
2748 // Load counter into rdx | |
2749 __ movl(rdx, Address(rdi, Deoptimization::UnrollBlock::number_of_frames_offset_in_bytes())); | |
2750 | |
2751 // Pick up the initial fp we should save | |
304 | 2752 __ movptr(rbp, Address(rdi, Deoptimization::UnrollBlock::initial_fp_offset_in_bytes())); |
0 | 2753 |
2754 // Now adjust the caller's stack to make up for the extra locals | |
2755 // but record the original sp so that we can save it in the skeletal interpreter | |
2756 // frame and the stack walking of interpreter_sender will get the unextended sp | |
2757 // value and not the "real" sp value. | |
2758 | |
2759 const Register sender_sp = r8; | |
2760 | |
304 | 2761 __ mov(sender_sp, rsp); |
0 | 2762 __ movl(rbx, Address(rdi, |
2763 Deoptimization::UnrollBlock:: | |
2764 caller_adjustment_offset_in_bytes())); | |
304 | 2765 __ subptr(rsp, rbx); |
0 | 2766 |
2767 // Push interpreter frames in a loop | |
2768 Label loop; | |
2769 __ bind(loop); | |
304 | 2770 __ movptr(rbx, Address(rsi, 0)); // Load frame size |
2771 #ifdef CC_INTERP | |
2772 __ subptr(rbx, 4*wordSize); // we'll push pc and ebp by hand and | |
2773 #ifdef ASSERT | |
2774 __ push(0xDEADDEAD); // Make a recognizable pattern | |
2775 __ push(0xDEADDEAD); | |
2776 #else /* ASSERT */ | |
2777 __ subptr(rsp, 2*wordSize); // skip the "static long no_param" | |
2778 #endif /* ASSERT */ | |
2779 #else | |
2780 __ subptr(rbx, 2*wordSize); // We'll push pc and ebp by hand | |
2781 #endif // CC_INTERP | |
2782 __ pushptr(Address(rcx, 0)); // Save return address | |
0 | 2783 __ enter(); // Save old & set new ebp |
304 | 2784 __ subptr(rsp, rbx); // Prolog |
2785 #ifdef CC_INTERP | |
2786 __ movptr(Address(rbp, | |
2787 -(sizeof(BytecodeInterpreter)) + in_bytes(byte_offset_of(BytecodeInterpreter, _sender_sp))), | |
2788 sender_sp); // Make it walkable | |
2789 #else /* CC_INTERP */ | |
0 | 2790 // This value is corrected by layout_activation_impl |
304 | 2791 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD ); |
2792 __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), sender_sp); // Make it walkable | |
2793 #endif /* CC_INTERP */ | |
2794 __ mov(sender_sp, rsp); // Pass sender_sp to next frame | |
2795 __ addptr(rsi, wordSize); // Bump array pointer (sizes) | |
2796 __ addptr(rcx, wordSize); // Bump array pointer (pcs) | |
0 | 2797 __ decrementl(rdx); // Decrement counter |
2798 __ jcc(Assembler::notZero, loop); | |
304 | 2799 __ pushptr(Address(rcx, 0)); // Save final return address |
0 | 2800 |
2801 // Re-push self-frame | |
2802 __ enter(); // Save old & set new ebp | |
2803 | |
2804 // Allocate a full sized register save area. | |
2805 // Return address and rbp are in place, so we allocate two less words. | |
304 | 2806 __ subptr(rsp, (frame_size_in_words - 2) * wordSize); |
0 | 2807 |
2808 // Restore frame locals after moving the frame | |
2809 __ movdbl(Address(rsp, RegisterSaver::xmm0_offset_in_bytes()), xmm0); | |
304 | 2810 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); |
0 | 2811 |
2812 // Call C code. Need thread but NOT official VM entry | |
2813 // crud. We cannot block on this call, no GC can happen. Call should | |
2814 // restore return values to their stack-slots with the new SP. | |
2815 // | |
2816 // void Deoptimization::unpack_frames(JavaThread* thread, int exec_mode) | |
2817 | |
2818 // Use rbp because the frames look interpreted now | |
2819 __ set_last_Java_frame(noreg, rbp, NULL); | |
2820 | |
304 | 2821 __ mov(c_rarg0, r15_thread); |
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2822 __ movl(c_rarg1, r14); // second arg: exec_mode |
0 | 2823 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); |
2824 | |
2825 // Set an oopmap for the call site | |
2826 oop_maps->add_gc_map(__ pc() - start, | |
2827 new OopMap( frame_size_in_words, 0 )); | |
2828 | |
2829 __ reset_last_Java_frame(true, false); | |
2830 | |
2831 // Collect return values | |
2832 __ movdbl(xmm0, Address(rsp, RegisterSaver::xmm0_offset_in_bytes())); | |
304 | 2833 __ movptr(rax, Address(rsp, RegisterSaver::rax_offset_in_bytes())); |
2834 // I think this is useless (throwing pc?) | |
2835 __ movptr(rdx, Address(rsp, RegisterSaver::rdx_offset_in_bytes())); | |
0 | 2836 |
2837 // Pop self-frame. | |
2838 __ leave(); // Epilog | |
2839 | |
2840 // Jump to interpreter | |
2841 __ ret(0); | |
2842 | |
2843 // Make sure all code is generated | |
2844 masm->flush(); | |
2845 | |
304 | 2846 _deopt_blob = DeoptimizationBlob::create(&buffer, oop_maps, 0, exception_offset, reexecute_offset, frame_size_in_words); |
2847 _deopt_blob->set_unpack_with_exception_in_tls_offset(exception_in_tls_offset); | |
0 | 2848 } |
2849 | |
2850 #ifdef COMPILER2 | |
2851 //------------------------------generate_uncommon_trap_blob-------------------- | |
2852 void SharedRuntime::generate_uncommon_trap_blob() { | |
2853 // Allocate space for the code | |
2854 ResourceMark rm; | |
2855 // Setup code generation tools | |
2856 CodeBuffer buffer("uncommon_trap_blob", 2048, 1024); | |
2857 MacroAssembler* masm = new MacroAssembler(&buffer); | |
2858 | |
2859 assert(SimpleRuntimeFrame::framesize % 4 == 0, "sp not 16-byte aligned"); | |
2860 | |
2861 address start = __ pc(); | |
2862 | |
2863 // Push self-frame. We get here with a return address on the | |
2864 // stack, so rsp is 8-byte aligned until we allocate our frame. | |
304 | 2865 __ subptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Epilog! |
0 | 2866 |
2867 // No callee saved registers. rbp is assumed implicitly saved | |
304 | 2868 __ movptr(Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt), rbp); |
0 | 2869 |
2870 // compiler left unloaded_class_index in j_rarg0 move to where the | |
2871 // runtime expects it. | |
2872 __ movl(c_rarg1, j_rarg0); | |
2873 | |
2874 __ set_last_Java_frame(noreg, noreg, NULL); | |
2875 | |
2876 // Call C code. Need thread but NOT official VM entry | |
2877 // crud. We cannot block on this call, no GC can happen. Call should | |
2878 // capture callee-saved registers as well as return values. | |
2879 // Thread is in rdi already. | |
2880 // | |
2881 // UnrollBlock* uncommon_trap(JavaThread* thread, jint unloaded_class_index); | |
2882 | |
304 | 2883 __ mov(c_rarg0, r15_thread); |
0 | 2884 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap))); |
2885 | |
2886 // Set an oopmap for the call site | |
2887 OopMapSet* oop_maps = new OopMapSet(); | |
2888 OopMap* map = new OopMap(SimpleRuntimeFrame::framesize, 0); | |
2889 | |
2890 // location of rbp is known implicitly by the frame sender code | |
2891 | |
2892 oop_maps->add_gc_map(__ pc() - start, map); | |
2893 | |
2894 __ reset_last_Java_frame(false, false); | |
2895 | |
2896 // Load UnrollBlock* into rdi | |
304 | 2897 __ mov(rdi, rax); |
0 | 2898 |
2899 // Pop all the frames we must move/replace. | |
2900 // | |
2901 // Frame picture (youngest to oldest) | |
2902 // 1: self-frame (no frame link) | |
2903 // 2: deopting frame (no frame link) | |
2904 // 3: caller of deopting frame (could be compiled/interpreted). | |
2905 | |
2906 // Pop self-frame. We have no frame, and must rely only on rax and rsp. | |
304 | 2907 __ addptr(rsp, (SimpleRuntimeFrame::framesize - 2) << LogBytesPerInt); // Epilog! |
0 | 2908 |
2909 // Pop deoptimized frame (int) | |
2910 __ movl(rcx, Address(rdi, | |
2911 Deoptimization::UnrollBlock:: | |
2912 size_of_deoptimized_frame_offset_in_bytes())); | |
304 | 2913 __ addptr(rsp, rcx); |
0 | 2914 |
2915 // rsp should be pointing at the return address to the caller (3) | |
2916 | |
2917 // Stack bang to make sure there's enough room for these interpreter frames. | |
2918 if (UseStackBanging) { | |
2919 __ movl(rbx, Address(rdi ,Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); | |
2920 __ bang_stack_size(rbx, rcx); | |
2921 } | |
2922 | |
2923 // Load address of array of frame pcs into rcx (address*) | |
304 | 2924 __ movptr(rcx, |
2925 Address(rdi, | |
2926 Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); | |
0 | 2927 |
2928 // Trash the return pc | |
304 | 2929 __ addptr(rsp, wordSize); |
0 | 2930 |
2931 // Load address of array of frame sizes into rsi (intptr_t*) | |
304 | 2932 __ movptr(rsi, Address(rdi, |
2933 Deoptimization::UnrollBlock:: | |
2934 frame_sizes_offset_in_bytes())); | |
0 | 2935 |
2936 // Counter | |
2937 __ movl(rdx, Address(rdi, | |
2938 Deoptimization::UnrollBlock:: | |
2939 number_of_frames_offset_in_bytes())); // (int) | |
2940 | |
2941 // Pick up the initial fp we should save | |
304 | 2942 __ movptr(rbp, |
2943 Address(rdi, | |
2944 Deoptimization::UnrollBlock::initial_fp_offset_in_bytes())); | |
0 | 2945 |
2946 // Now adjust the caller's stack to make up for the extra locals but | |
2947 // record the original sp so that we can save it in the skeletal | |
2948 // interpreter frame and the stack walking of interpreter_sender | |
2949 // will get the unextended sp value and not the "real" sp value. | |
2950 | |
2951 const Register sender_sp = r8; | |
2952 | |
304 | 2953 __ mov(sender_sp, rsp); |
0 | 2954 __ movl(rbx, Address(rdi, |
2955 Deoptimization::UnrollBlock:: | |
2956 caller_adjustment_offset_in_bytes())); // (int) | |
304 | 2957 __ subptr(rsp, rbx); |
0 | 2958 |
2959 // Push interpreter frames in a loop | |
2960 Label loop; | |
2961 __ bind(loop); | |
304 | 2962 __ movptr(rbx, Address(rsi, 0)); // Load frame size |
2963 __ subptr(rbx, 2 * wordSize); // We'll push pc and rbp by hand | |
2964 __ pushptr(Address(rcx, 0)); // Save return address | |
2965 __ enter(); // Save old & set new rbp | |
2966 __ subptr(rsp, rbx); // Prolog | |
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2967 #ifdef CC_INTERP |
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2968 __ movptr(Address(rbp, |
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2969 -(sizeof(BytecodeInterpreter)) + in_bytes(byte_offset_of(BytecodeInterpreter, _sender_sp))), |
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2970 sender_sp); // Make it walkable |
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2971 #else // CC_INTERP |
304 | 2972 __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), |
2973 sender_sp); // Make it walkable | |
0 | 2974 // This value is corrected by layout_activation_impl |
304 | 2975 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD ); |
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2976 #endif // CC_INTERP |
304 | 2977 __ mov(sender_sp, rsp); // Pass sender_sp to next frame |
2978 __ addptr(rsi, wordSize); // Bump array pointer (sizes) | |
2979 __ addptr(rcx, wordSize); // Bump array pointer (pcs) | |
2980 __ decrementl(rdx); // Decrement counter | |
0 | 2981 __ jcc(Assembler::notZero, loop); |
304 | 2982 __ pushptr(Address(rcx, 0)); // Save final return address |
0 | 2983 |
2984 // Re-push self-frame | |
2985 __ enter(); // Save old & set new rbp | |
304 | 2986 __ subptr(rsp, (SimpleRuntimeFrame::framesize - 4) << LogBytesPerInt); |
0 | 2987 // Prolog |
2988 | |
2989 // Use rbp because the frames look interpreted now | |
2990 __ set_last_Java_frame(noreg, rbp, NULL); | |
2991 | |
2992 // Call C code. Need thread but NOT official VM entry | |
2993 // crud. We cannot block on this call, no GC can happen. Call should | |
2994 // restore return values to their stack-slots with the new SP. | |
2995 // Thread is in rdi already. | |
2996 // | |
2997 // BasicType unpack_frames(JavaThread* thread, int exec_mode); | |
2998 | |
304 | 2999 __ mov(c_rarg0, r15_thread); |
0 | 3000 __ movl(c_rarg1, Deoptimization::Unpack_uncommon_trap); |
3001 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); | |
3002 | |
3003 // Set an oopmap for the call site | |
3004 oop_maps->add_gc_map(__ pc() - start, new OopMap(SimpleRuntimeFrame::framesize, 0)); | |
3005 | |
3006 __ reset_last_Java_frame(true, false); | |
3007 | |
3008 // Pop self-frame. | |
3009 __ leave(); // Epilog | |
3010 | |
3011 // Jump to interpreter | |
3012 __ ret(0); | |
3013 | |
3014 // Make sure all code is generated | |
3015 masm->flush(); | |
3016 | |
3017 _uncommon_trap_blob = UncommonTrapBlob::create(&buffer, oop_maps, | |
3018 SimpleRuntimeFrame::framesize >> 1); | |
3019 } | |
3020 #endif // COMPILER2 | |
3021 | |
3022 | |
3023 //------------------------------generate_handler_blob------ | |
3024 // | |
3025 // Generate a special Compile2Runtime blob that saves all registers, | |
3026 // and setup oopmap. | |
3027 // | |
3028 static SafepointBlob* generate_handler_blob(address call_ptr, bool cause_return) { | |
3029 assert(StubRoutines::forward_exception_entry() != NULL, | |
3030 "must be generated before"); | |
3031 | |
3032 ResourceMark rm; | |
3033 OopMapSet *oop_maps = new OopMapSet(); | |
3034 OopMap* map; | |
3035 | |
3036 // Allocate space for the code. Setup code generation tools. | |
3037 CodeBuffer buffer("handler_blob", 2048, 1024); | |
3038 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3039 | |
3040 address start = __ pc(); | |
3041 address call_pc = NULL; | |
3042 int frame_size_in_words; | |
3043 | |
3044 // Make room for return address (or push it again) | |
3045 if (!cause_return) { | |
304 | 3046 __ push(rbx); |
0 | 3047 } |
3048 | |
3049 // Save registers, fpu state, and flags | |
3050 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
3051 | |
3052 // The following is basically a call_VM. However, we need the precise | |
3053 // address of the call in order to generate an oopmap. Hence, we do all the | |
3054 // work outselves. | |
3055 | |
3056 __ set_last_Java_frame(noreg, noreg, NULL); | |
3057 | |
3058 // The return address must always be correct so that frame constructor never | |
3059 // sees an invalid pc. | |
3060 | |
3061 if (!cause_return) { | |
3062 // overwrite the dummy value we pushed on entry | |
304 | 3063 __ movptr(c_rarg0, Address(r15_thread, JavaThread::saved_exception_pc_offset())); |
3064 __ movptr(Address(rbp, wordSize), c_rarg0); | |
0 | 3065 } |
3066 | |
3067 // Do the call | |
304 | 3068 __ mov(c_rarg0, r15_thread); |
0 | 3069 __ call(RuntimeAddress(call_ptr)); |
3070 | |
3071 // Set an oopmap for the call site. This oopmap will map all | |
3072 // oop-registers and debug-info registers as callee-saved. This | |
3073 // will allow deoptimization at this safepoint to find all possible | |
3074 // debug-info recordings, as well as let GC find all oops. | |
3075 | |
3076 oop_maps->add_gc_map( __ pc() - start, map); | |
3077 | |
3078 Label noException; | |
3079 | |
3080 __ reset_last_Java_frame(false, false); | |
3081 | |
304 | 3082 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 3083 __ jcc(Assembler::equal, noException); |
3084 | |
3085 // Exception pending | |
3086 | |
3087 RegisterSaver::restore_live_registers(masm); | |
3088 | |
3089 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
3090 | |
3091 // No exception case | |
3092 __ bind(noException); | |
3093 | |
3094 // Normal exit, restore registers and exit. | |
3095 RegisterSaver::restore_live_registers(masm); | |
3096 | |
3097 __ ret(0); | |
3098 | |
3099 // Make sure all code is generated | |
3100 masm->flush(); | |
3101 | |
3102 // Fill-out other meta info | |
3103 return SafepointBlob::create(&buffer, oop_maps, frame_size_in_words); | |
3104 } | |
3105 | |
3106 // | |
3107 // generate_resolve_blob - call resolution (static/virtual/opt-virtual/ic-miss | |
3108 // | |
3109 // Generate a stub that calls into vm to find out the proper destination | |
3110 // of a java call. All the argument registers are live at this point | |
3111 // but since this is generic code we don't know what they are and the caller | |
3112 // must do any gc of the args. | |
3113 // | |
3114 static RuntimeStub* generate_resolve_blob(address destination, const char* name) { | |
3115 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); | |
3116 | |
3117 // allocate space for the code | |
3118 ResourceMark rm; | |
3119 | |
3120 CodeBuffer buffer(name, 1000, 512); | |
3121 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3122 | |
3123 int frame_size_in_words; | |
3124 | |
3125 OopMapSet *oop_maps = new OopMapSet(); | |
3126 OopMap* map = NULL; | |
3127 | |
3128 int start = __ offset(); | |
3129 | |
3130 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
3131 | |
3132 int frame_complete = __ offset(); | |
3133 | |
3134 __ set_last_Java_frame(noreg, noreg, NULL); | |
3135 | |
304 | 3136 __ mov(c_rarg0, r15_thread); |
0 | 3137 |
3138 __ call(RuntimeAddress(destination)); | |
3139 | |
3140 | |
3141 // Set an oopmap for the call site. | |
3142 // We need this not only for callee-saved registers, but also for volatile | |
3143 // registers that the compiler might be keeping live across a safepoint. | |
3144 | |
3145 oop_maps->add_gc_map( __ offset() - start, map); | |
3146 | |
3147 // rax contains the address we are going to jump to assuming no exception got installed | |
3148 | |
3149 // clear last_Java_sp | |
3150 __ reset_last_Java_frame(false, false); | |
3151 // check for pending exceptions | |
3152 Label pending; | |
304 | 3153 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 3154 __ jcc(Assembler::notEqual, pending); |
3155 | |
3156 // get the returned methodOop | |
304 | 3157 __ movptr(rbx, Address(r15_thread, JavaThread::vm_result_offset())); |
3158 __ movptr(Address(rsp, RegisterSaver::rbx_offset_in_bytes()), rbx); | |
3159 | |
3160 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); | |
0 | 3161 |
3162 RegisterSaver::restore_live_registers(masm); | |
3163 | |
3164 // We are back the the original state on entry and ready to go. | |
3165 | |
3166 __ jmp(rax); | |
3167 | |
3168 // Pending exception after the safepoint | |
3169 | |
3170 __ bind(pending); | |
3171 | |
3172 RegisterSaver::restore_live_registers(masm); | |
3173 | |
3174 // exception pending => remove activation and forward to exception handler | |
3175 | |
3176 __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), (int)NULL_WORD); | |
3177 | |
304 | 3178 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset())); |
0 | 3179 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
3180 | |
3181 // ------------- | |
3182 // make sure all code is generated | |
3183 masm->flush(); | |
3184 | |
3185 // return the blob | |
3186 // frame_size_words or bytes?? | |
3187 return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_in_words, oop_maps, true); | |
3188 } | |
3189 | |
3190 | |
3191 void SharedRuntime::generate_stubs() { | |
3192 | |
3193 _wrong_method_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method), | |
3194 "wrong_method_stub"); | |
3195 _ic_miss_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_ic_miss), | |
3196 "ic_miss_stub"); | |
3197 _resolve_opt_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_opt_virtual_call_C), | |
3198 "resolve_opt_virtual_call"); | |
3199 | |
3200 _resolve_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_virtual_call_C), | |
3201 "resolve_virtual_call"); | |
3202 | |
3203 _resolve_static_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_static_call_C), | |
3204 "resolve_static_call"); | |
3205 _polling_page_safepoint_handler_blob = | |
3206 generate_handler_blob(CAST_FROM_FN_PTR(address, | |
3207 SafepointSynchronize::handle_polling_page_exception), false); | |
3208 | |
3209 _polling_page_return_handler_blob = | |
3210 generate_handler_blob(CAST_FROM_FN_PTR(address, | |
3211 SafepointSynchronize::handle_polling_page_exception), true); | |
3212 | |
3213 generate_deopt_blob(); | |
3214 | |
3215 #ifdef COMPILER2 | |
3216 generate_uncommon_trap_blob(); | |
3217 #endif // COMPILER2 | |
3218 } | |
3219 | |
3220 | |
3221 #ifdef COMPILER2 | |
3222 // This is here instead of runtime_x86_64.cpp because it uses SimpleRuntimeFrame | |
3223 // | |
3224 //------------------------------generate_exception_blob--------------------------- | |
3225 // creates exception blob at the end | |
3226 // Using exception blob, this code is jumped from a compiled method. | |
3227 // (see emit_exception_handler in x86_64.ad file) | |
3228 // | |
3229 // Given an exception pc at a call we call into the runtime for the | |
3230 // handler in this method. This handler might merely restore state | |
3231 // (i.e. callee save registers) unwind the frame and jump to the | |
3232 // exception handler for the nmethod if there is no Java level handler | |
3233 // for the nmethod. | |
3234 // | |
3235 // This code is entered with a jmp. | |
3236 // | |
3237 // Arguments: | |
3238 // rax: exception oop | |
3239 // rdx: exception pc | |
3240 // | |
3241 // Results: | |
3242 // rax: exception oop | |
3243 // rdx: exception pc in caller or ??? | |
3244 // destination: exception handler of caller | |
3245 // | |
3246 // Note: the exception pc MUST be at a call (precise debug information) | |
3247 // Registers rax, rdx, rcx, rsi, rdi, r8-r11 are not callee saved. | |
3248 // | |
3249 | |
3250 void OptoRuntime::generate_exception_blob() { | |
3251 assert(!OptoRuntime::is_callee_saved_register(RDX_num), ""); | |
3252 assert(!OptoRuntime::is_callee_saved_register(RAX_num), ""); | |
3253 assert(!OptoRuntime::is_callee_saved_register(RCX_num), ""); | |
3254 | |
3255 assert(SimpleRuntimeFrame::framesize % 4 == 0, "sp not 16-byte aligned"); | |
3256 | |
3257 // Allocate space for the code | |
3258 ResourceMark rm; | |
3259 // Setup code generation tools | |
3260 CodeBuffer buffer("exception_blob", 2048, 1024); | |
3261 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3262 | |
3263 | |
3264 address start = __ pc(); | |
3265 | |
3266 // Exception pc is 'return address' for stack walker | |
304 | 3267 __ push(rdx); |
3268 __ subptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Prolog | |
0 | 3269 |
3270 // Save callee-saved registers. See x86_64.ad. | |
3271 | |
3272 // rbp is an implicitly saved callee saved register (i.e. the calling | |
3273 // convention will save restore it in prolog/epilog) Other than that | |
3274 // there are no callee save registers now that adapter frames are gone. | |
3275 | |
304 | 3276 __ movptr(Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt), rbp); |
0 | 3277 |
3278 // Store exception in Thread object. We cannot pass any arguments to the | |
3279 // handle_exception call, since we do not want to make any assumption | |
3280 // about the size of the frame where the exception happened in. | |
3281 // c_rarg0 is either rdi (Linux) or rcx (Windows). | |
304 | 3282 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()),rax); |
3283 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), rdx); | |
0 | 3284 |
3285 // This call does all the hard work. It checks if an exception handler | |
3286 // exists in the method. | |
3287 // If so, it returns the handler address. | |
3288 // If not, it prepares for stack-unwinding, restoring the callee-save | |
3289 // registers of the frame being removed. | |
3290 // | |
3291 // address OptoRuntime::handle_exception_C(JavaThread* thread) | |
3292 | |
3293 __ set_last_Java_frame(noreg, noreg, NULL); | |
304 | 3294 __ mov(c_rarg0, r15_thread); |
0 | 3295 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, OptoRuntime::handle_exception_C))); |
3296 | |
3297 // Set an oopmap for the call site. This oopmap will only be used if we | |
3298 // are unwinding the stack. Hence, all locations will be dead. | |
3299 // Callee-saved registers will be the same as the frame above (i.e., | |
3300 // handle_exception_stub), since they were restored when we got the | |
3301 // exception. | |
3302 | |
3303 OopMapSet* oop_maps = new OopMapSet(); | |
3304 | |
3305 oop_maps->add_gc_map( __ pc()-start, new OopMap(SimpleRuntimeFrame::framesize, 0)); | |
3306 | |
3307 __ reset_last_Java_frame(false, false); | |
3308 | |
3309 // Restore callee-saved registers | |
3310 | |
3311 // rbp is an implicitly saved callee saved register (i.e. the calling | |
3312 // convention will save restore it in prolog/epilog) Other than that | |
3313 // there are no callee save registers no that adapter frames are gone. | |
3314 | |
304 | 3315 __ movptr(rbp, Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt)); |
3316 | |
3317 __ addptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Epilog | |
3318 __ pop(rdx); // No need for exception pc anymore | |
0 | 3319 |
3320 // rax: exception handler | |
3321 | |
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3322 // Restore SP from BP if the exception PC is a MethodHandle call site. |
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3323 __ cmpl(Address(r15_thread, JavaThread::is_method_handle_return_offset()), 0); |
1567 | 3324 __ cmovptr(Assembler::notEqual, rsp, rbp_mh_SP_save); |
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3325 |
0 | 3326 // We have a handler in rax (could be deopt blob). |
304 | 3327 __ mov(r8, rax); |
0 | 3328 |
3329 // Get the exception oop | |
304 | 3330 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); |
0 | 3331 // Get the exception pc in case we are deoptimized |
304 | 3332 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); |
0 | 3333 #ifdef ASSERT |
3334 __ movptr(Address(r15_thread, JavaThread::exception_handler_pc_offset()), (int)NULL_WORD); | |
3335 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int)NULL_WORD); | |
3336 #endif | |
3337 // Clear the exception oop so GC no longer processes it as a root. | |
3338 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), (int)NULL_WORD); | |
3339 | |
3340 // rax: exception oop | |
3341 // r8: exception handler | |
3342 // rdx: exception pc | |
3343 // Jump to handler | |
3344 | |
3345 __ jmp(r8); | |
3346 | |
3347 // Make sure all code is generated | |
3348 masm->flush(); | |
3349 | |
3350 // Set exception blob | |
3351 _exception_blob = ExceptionBlob::create(&buffer, oop_maps, SimpleRuntimeFrame::framesize >> 1); | |
3352 } | |
3353 #endif // COMPILER2 |