Mercurial > hg > graal-compiler
annotate src/cpu/x86/vm/sharedRuntime_x86_64.cpp @ 2928:1e13559b112d
small fix in deopt stub, more branch prediction code
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Thu, 09 Jun 2011 20:25:38 +0200 |
parents | 75a99b4f1c98 |
children | 9b8f30608e62 |
rev | line source |
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0 | 1 /* |
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7009309: JSR 292: compiler/6991596/Test6991596.java crashes on fastdebug JDK7/b122
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2 * Copyright (c) 2003, 2011, 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 |
c18cbe5936b8
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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 | |
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6792301: StackAlignmentInBytes not honored for compiled native methods
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58 const int StackAlignmentInSlots = StackAlignmentInBytes / VMRegImpl::stack_slot_size; |
c9004fe53695
6792301: StackAlignmentInBytes not honored for compiled native methods
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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 // Note: r13 contains the senderSP on entry. We must preserve it since | |
614 // we may do a i2c -> c2i transition if we lose a race where compiled | |
615 // code goes non-entrant while we get args ready. | |
616 // In addition we use r13 to locate all the interpreter args as | |
617 // we must align the stack to 16 bytes on an i2c entry else we | |
618 // lose alignment we expect in all compiled code and register | |
619 // save code can segv when fxsave instructions find improperly | |
620 // aligned stack pointer. | |
621 | |
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622 // Pick up the return address |
304 | 623 __ movptr(rax, Address(rsp, 0)); |
0 | 624 |
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625 // Must preserve original SP for loading incoming arguments because |
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626 // we need to align the outgoing SP for compiled code. |
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627 __ movptr(r11, rsp); |
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628 |
0 | 629 // Cut-out for having no stack args. Since up to 2 int/oop args are passed |
630 // in registers, we will occasionally have no stack args. | |
631 int comp_words_on_stack = 0; | |
632 if (comp_args_on_stack) { | |
633 // Sig words on the stack are greater-than VMRegImpl::stack0. Those in | |
634 // registers are below. By subtracting stack0, we either get a negative | |
635 // number (all values in registers) or the maximum stack slot accessed. | |
636 | |
637 // Convert 4-byte c2 stack slots to words. | |
638 comp_words_on_stack = round_to(comp_args_on_stack*VMRegImpl::stack_slot_size, wordSize)>>LogBytesPerWord; | |
639 // Round up to miminum stack alignment, in wordSize | |
640 comp_words_on_stack = round_to(comp_words_on_stack, 2); | |
304 | 641 __ subptr(rsp, comp_words_on_stack * wordSize); |
0 | 642 } |
643 | |
644 | |
645 // Ensure compiled code always sees stack at proper alignment | |
304 | 646 __ andptr(rsp, -16); |
0 | 647 |
648 // push the return address and misalign the stack that youngest frame always sees | |
649 // as far as the placement of the call instruction | |
304 | 650 __ push(rax); |
0 | 651 |
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652 // Put saved SP in another register |
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653 const Register saved_sp = rax; |
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654 __ movptr(saved_sp, r11); |
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655 |
0 | 656 // Will jump to the compiled code just as if compiled code was doing it. |
657 // Pre-load the register-jump target early, to schedule it better. | |
304 | 658 __ movptr(r11, Address(rbx, in_bytes(methodOopDesc::from_compiled_offset()))); |
0 | 659 |
660 // Now generate the shuffle code. Pick up all register args and move the | |
661 // rest through the floating point stack top. | |
662 for (int i = 0; i < total_args_passed; i++) { | |
663 if (sig_bt[i] == T_VOID) { | |
664 // Longs and doubles are passed in native word order, but misaligned | |
665 // in the 32-bit build. | |
666 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
667 continue; | |
668 } | |
669 | |
670 // Pick up 0, 1 or 2 words from SP+offset. | |
671 | |
672 assert(!regs[i].second()->is_valid() || regs[i].first()->next() == regs[i].second(), | |
673 "scrambled load targets?"); | |
674 // Load in argument order going down. | |
1506 | 675 int ld_off = (total_args_passed - i)*Interpreter::stackElementSize; |
0 | 676 // Point to interpreter value (vs. tag) |
1506 | 677 int next_off = ld_off - Interpreter::stackElementSize; |
0 | 678 // |
679 // | |
680 // | |
681 VMReg r_1 = regs[i].first(); | |
682 VMReg r_2 = regs[i].second(); | |
683 if (!r_1->is_valid()) { | |
684 assert(!r_2->is_valid(), ""); | |
685 continue; | |
686 } | |
687 if (r_1->is_stack()) { | |
688 // Convert stack slot to an SP offset (+ wordSize to account for return address ) | |
689 int st_off = regs[i].first()->reg2stack()*VMRegImpl::stack_slot_size + wordSize; | |
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690 |
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691 // We can use r13 as a temp here because compiled code doesn't need r13 as an input |
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692 // and if we end up going thru a c2i because of a miss a reasonable value of r13 |
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693 // will be generated. |
0 | 694 if (!r_2->is_valid()) { |
695 // sign extend??? | |
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696 __ movl(r13, Address(saved_sp, ld_off)); |
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697 __ movptr(Address(rsp, st_off), r13); |
0 | 698 } else { |
699 // | |
700 // We are using two optoregs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE | |
701 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case | |
702 // So we must adjust where to pick up the data to match the interpreter. | |
703 // | |
704 // Interpreter local[n] == MSW, local[n+1] == LSW however locals | |
705 // are accessed as negative so LSW is at LOW address | |
706 | |
707 // ld_off is MSW so get LSW | |
708 const int offset = (sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? | |
709 next_off : ld_off; | |
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710 __ movq(r13, Address(saved_sp, offset)); |
0 | 711 // st_off is LSW (i.e. reg.first()) |
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712 __ movq(Address(rsp, st_off), r13); |
0 | 713 } |
714 } else if (r_1->is_Register()) { // Register argument | |
715 Register r = r_1->as_Register(); | |
716 assert(r != rax, "must be different"); | |
717 if (r_2->is_valid()) { | |
718 // | |
719 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE | |
720 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case | |
721 // So we must adjust where to pick up the data to match the interpreter. | |
722 | |
723 const int offset = (sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? | |
724 next_off : ld_off; | |
725 | |
726 // this can be a misaligned move | |
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727 __ movq(r, Address(saved_sp, offset)); |
0 | 728 } else { |
729 // sign extend and use a full word? | |
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730 __ movl(r, Address(saved_sp, ld_off)); |
0 | 731 } |
732 } else { | |
733 if (!r_2->is_valid()) { | |
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734 __ movflt(r_1->as_XMMRegister(), Address(saved_sp, ld_off)); |
0 | 735 } else { |
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736 __ movdbl(r_1->as_XMMRegister(), Address(saved_sp, next_off)); |
0 | 737 } |
738 } | |
739 } | |
740 | |
741 // 6243940 We might end up in handle_wrong_method if | |
742 // the callee is deoptimized as we race thru here. If that | |
743 // happens we don't want to take a safepoint because the | |
744 // caller frame will look interpreted and arguments are now | |
745 // "compiled" so it is much better to make this transition | |
746 // invisible to the stack walking code. Unfortunately if | |
747 // we try and find the callee by normal means a safepoint | |
748 // is possible. So we stash the desired callee in the thread | |
749 // and the vm will find there should this case occur. | |
750 | |
304 | 751 __ movptr(Address(r15_thread, JavaThread::callee_target_offset()), rbx); |
0 | 752 |
753 // put methodOop where a c2i would expect should we end up there | |
754 // only needed becaus eof c2 resolve stubs return methodOop as a result in | |
755 // rax | |
304 | 756 __ mov(rax, rbx); |
0 | 757 __ jmp(r11); |
758 } | |
759 | |
760 // --------------------------------------------------------------- | |
761 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm, | |
762 int total_args_passed, | |
763 int comp_args_on_stack, | |
764 const BasicType *sig_bt, | |
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765 const VMRegPair *regs, |
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766 AdapterFingerPrint* fingerprint) { |
0 | 767 address i2c_entry = __ pc(); |
768 | |
769 gen_i2c_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs); | |
770 | |
771 // ------------------------------------------------------------------------- | |
772 // Generate a C2I adapter. On entry we know rbx holds the methodOop during calls | |
773 // to the interpreter. The args start out packed in the compiled layout. They | |
774 // need to be unpacked into the interpreter layout. This will almost always | |
775 // require some stack space. We grow the current (compiled) stack, then repack | |
776 // the args. We finally end in a jump to the generic interpreter entry point. | |
777 // On exit from the interpreter, the interpreter will restore our SP (lest the | |
778 // compiled code, which relys solely on SP and not RBP, get sick). | |
779 | |
780 address c2i_unverified_entry = __ pc(); | |
781 Label skip_fixup; | |
782 Label ok; | |
783 | |
784 Register holder = rax; | |
785 Register receiver = j_rarg0; | |
786 Register temp = rbx; | |
787 | |
788 { | |
789 __ verify_oop(holder); | |
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790 __ load_klass(temp, receiver); |
0 | 791 __ verify_oop(temp); |
792 | |
304 | 793 __ cmpptr(temp, Address(holder, compiledICHolderOopDesc::holder_klass_offset())); |
794 __ movptr(rbx, Address(holder, compiledICHolderOopDesc::holder_method_offset())); | |
0 | 795 __ jcc(Assembler::equal, ok); |
796 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
797 | |
798 __ bind(ok); | |
799 // Method might have been compiled since the call site was patched to | |
800 // interpreted if that is the case treat it as a miss so we can get | |
801 // the call site corrected. | |
304 | 802 __ cmpptr(Address(rbx, in_bytes(methodOopDesc::code_offset())), (int32_t)NULL_WORD); |
0 | 803 __ jcc(Assembler::equal, skip_fixup); |
804 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
805 } | |
806 | |
807 address c2i_entry = __ pc(); | |
808 | |
809 gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup); | |
810 | |
811 __ flush(); | |
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812 return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
0 | 813 } |
814 | |
815 int SharedRuntime::c_calling_convention(const BasicType *sig_bt, | |
816 VMRegPair *regs, | |
817 int total_args_passed) { | |
818 // We return the amount of VMRegImpl stack slots we need to reserve for all | |
819 // the arguments NOT counting out_preserve_stack_slots. | |
820 | |
821 // NOTE: These arrays will have to change when c1 is ported | |
822 #ifdef _WIN64 | |
823 static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = { | |
824 c_rarg0, c_rarg1, c_rarg2, c_rarg3 | |
825 }; | |
826 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_c] = { | |
827 c_farg0, c_farg1, c_farg2, c_farg3 | |
828 }; | |
829 #else | |
830 static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = { | |
831 c_rarg0, c_rarg1, c_rarg2, c_rarg3, c_rarg4, c_rarg5 | |
832 }; | |
833 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_c] = { | |
834 c_farg0, c_farg1, c_farg2, c_farg3, | |
835 c_farg4, c_farg5, c_farg6, c_farg7 | |
836 }; | |
837 #endif // _WIN64 | |
838 | |
839 | |
840 uint int_args = 0; | |
841 uint fp_args = 0; | |
842 uint stk_args = 0; // inc by 2 each time | |
843 | |
844 for (int i = 0; i < total_args_passed; i++) { | |
845 switch (sig_bt[i]) { | |
846 case T_BOOLEAN: | |
847 case T_CHAR: | |
848 case T_BYTE: | |
849 case T_SHORT: | |
850 case T_INT: | |
851 if (int_args < Argument::n_int_register_parameters_c) { | |
852 regs[i].set1(INT_ArgReg[int_args++]->as_VMReg()); | |
853 #ifdef _WIN64 | |
854 fp_args++; | |
855 // Allocate slots for callee to stuff register args the stack. | |
856 stk_args += 2; | |
857 #endif | |
858 } else { | |
859 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
860 stk_args += 2; | |
861 } | |
862 break; | |
863 case T_LONG: | |
864 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
865 // fall through | |
866 case T_OBJECT: | |
867 case T_ARRAY: | |
868 case T_ADDRESS: | |
869 if (int_args < Argument::n_int_register_parameters_c) { | |
870 regs[i].set2(INT_ArgReg[int_args++]->as_VMReg()); | |
871 #ifdef _WIN64 | |
872 fp_args++; | |
873 stk_args += 2; | |
874 #endif | |
875 } else { | |
876 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
877 stk_args += 2; | |
878 } | |
879 break; | |
880 case T_FLOAT: | |
881 if (fp_args < Argument::n_float_register_parameters_c) { | |
882 regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg()); | |
883 #ifdef _WIN64 | |
884 int_args++; | |
885 // Allocate slots for callee to stuff register args the stack. | |
886 stk_args += 2; | |
887 #endif | |
888 } else { | |
889 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
890 stk_args += 2; | |
891 } | |
892 break; | |
893 case T_DOUBLE: | |
894 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
895 if (fp_args < Argument::n_float_register_parameters_c) { | |
896 regs[i].set2(FP_ArgReg[fp_args++]->as_VMReg()); | |
897 #ifdef _WIN64 | |
898 int_args++; | |
899 // Allocate slots for callee to stuff register args the stack. | |
900 stk_args += 2; | |
901 #endif | |
902 } else { | |
903 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
904 stk_args += 2; | |
905 } | |
906 break; | |
907 case T_VOID: // Halves of longs and doubles | |
908 assert(i != 0 && (sig_bt[i - 1] == T_LONG || sig_bt[i - 1] == T_DOUBLE), "expecting half"); | |
909 regs[i].set_bad(); | |
910 break; | |
911 default: | |
912 ShouldNotReachHere(); | |
913 break; | |
914 } | |
915 } | |
916 #ifdef _WIN64 | |
917 // windows abi requires that we always allocate enough stack space | |
918 // for 4 64bit registers to be stored down. | |
919 if (stk_args < 8) { | |
920 stk_args = 8; | |
921 } | |
922 #endif // _WIN64 | |
923 | |
924 return stk_args; | |
925 } | |
926 | |
927 // On 64 bit we will store integer like items to the stack as | |
928 // 64 bits items (sparc abi) even though java would only store | |
929 // 32bits for a parameter. On 32bit it will simply be 32 bits | |
930 // So this routine will do 32->32 on 32bit and 32->64 on 64bit | |
931 static void move32_64(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
932 if (src.first()->is_stack()) { | |
933 if (dst.first()->is_stack()) { | |
934 // stack to stack | |
935 __ movslq(rax, Address(rbp, reg2offset_in(src.first()))); | |
936 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
937 } else { | |
938 // stack to reg | |
939 __ movslq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()))); | |
940 } | |
941 } else if (dst.first()->is_stack()) { | |
942 // reg to stack | |
943 // Do we really have to sign extend??? | |
944 // __ movslq(src.first()->as_Register(), src.first()->as_Register()); | |
945 __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); | |
946 } else { | |
947 // Do we really have to sign extend??? | |
948 // __ movslq(dst.first()->as_Register(), src.first()->as_Register()); | |
949 if (dst.first() != src.first()) { | |
950 __ movq(dst.first()->as_Register(), src.first()->as_Register()); | |
951 } | |
952 } | |
953 } | |
954 | |
955 | |
956 // An oop arg. Must pass a handle not the oop itself | |
957 static void object_move(MacroAssembler* masm, | |
958 OopMap* map, | |
959 int oop_handle_offset, | |
960 int framesize_in_slots, | |
961 VMRegPair src, | |
962 VMRegPair dst, | |
963 bool is_receiver, | |
964 int* receiver_offset) { | |
965 | |
966 // must pass a handle. First figure out the location we use as a handle | |
967 | |
968 Register rHandle = dst.first()->is_stack() ? rax : dst.first()->as_Register(); | |
969 | |
970 // See if oop is NULL if it is we need no handle | |
971 | |
972 if (src.first()->is_stack()) { | |
973 | |
974 // Oop is already on the stack as an argument | |
975 int offset_in_older_frame = src.first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); | |
976 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + framesize_in_slots)); | |
977 if (is_receiver) { | |
978 *receiver_offset = (offset_in_older_frame + framesize_in_slots) * VMRegImpl::stack_slot_size; | |
979 } | |
980 | |
304 | 981 __ cmpptr(Address(rbp, reg2offset_in(src.first())), (int32_t)NULL_WORD); |
982 __ lea(rHandle, Address(rbp, reg2offset_in(src.first()))); | |
0 | 983 // conditionally move a NULL |
304 | 984 __ cmovptr(Assembler::equal, rHandle, Address(rbp, reg2offset_in(src.first()))); |
0 | 985 } else { |
986 | |
987 // Oop is in an a register we must store it to the space we reserve | |
988 // on the stack for oop_handles and pass a handle if oop is non-NULL | |
989 | |
990 const Register rOop = src.first()->as_Register(); | |
991 int oop_slot; | |
992 if (rOop == j_rarg0) | |
993 oop_slot = 0; | |
994 else if (rOop == j_rarg1) | |
995 oop_slot = 1; | |
996 else if (rOop == j_rarg2) | |
997 oop_slot = 2; | |
998 else if (rOop == j_rarg3) | |
999 oop_slot = 3; | |
1000 else if (rOop == j_rarg4) | |
1001 oop_slot = 4; | |
1002 else { | |
1003 assert(rOop == j_rarg5, "wrong register"); | |
1004 oop_slot = 5; | |
1005 } | |
1006 | |
1007 oop_slot = oop_slot * VMRegImpl::slots_per_word + oop_handle_offset; | |
1008 int offset = oop_slot*VMRegImpl::stack_slot_size; | |
1009 | |
1010 map->set_oop(VMRegImpl::stack2reg(oop_slot)); | |
1011 // Store oop in handle area, may be NULL | |
304 | 1012 __ movptr(Address(rsp, offset), rOop); |
0 | 1013 if (is_receiver) { |
1014 *receiver_offset = offset; | |
1015 } | |
1016 | |
304 | 1017 __ cmpptr(rOop, (int32_t)NULL_WORD); |
1018 __ lea(rHandle, Address(rsp, offset)); | |
0 | 1019 // conditionally move a NULL from the handle area where it was just stored |
304 | 1020 __ cmovptr(Assembler::equal, rHandle, Address(rsp, offset)); |
0 | 1021 } |
1022 | |
1023 // If arg is on the stack then place it otherwise it is already in correct reg. | |
1024 if (dst.first()->is_stack()) { | |
304 | 1025 __ movptr(Address(rsp, reg2offset_out(dst.first())), rHandle); |
0 | 1026 } |
1027 } | |
1028 | |
1029 // A float arg may have to do float reg int reg conversion | |
1030 static void float_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1031 assert(!src.second()->is_valid() && !dst.second()->is_valid(), "bad float_move"); | |
1032 | |
1033 // The calling conventions assures us that each VMregpair is either | |
1034 // all really one physical register or adjacent stack slots. | |
1035 // This greatly simplifies the cases here compared to sparc. | |
1036 | |
1037 if (src.first()->is_stack()) { | |
1038 if (dst.first()->is_stack()) { | |
1039 __ movl(rax, Address(rbp, reg2offset_in(src.first()))); | |
304 | 1040 __ movptr(Address(rsp, reg2offset_out(dst.first())), rax); |
0 | 1041 } else { |
1042 // stack to reg | |
1043 assert(dst.first()->is_XMMRegister(), "only expect xmm registers as parameters"); | |
1044 __ movflt(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_in(src.first()))); | |
1045 } | |
1046 } else if (dst.first()->is_stack()) { | |
1047 // reg to stack | |
1048 assert(src.first()->is_XMMRegister(), "only expect xmm registers as parameters"); | |
1049 __ movflt(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); | |
1050 } else { | |
1051 // reg to reg | |
1052 // In theory these overlap but the ordering is such that this is likely a nop | |
1053 if ( src.first() != dst.first()) { | |
1054 __ movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister()); | |
1055 } | |
1056 } | |
1057 } | |
1058 | |
1059 // A long move | |
1060 static void long_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1061 | |
1062 // The calling conventions assures us that each VMregpair is either | |
1063 // all really one physical register or adjacent stack slots. | |
1064 // This greatly simplifies the cases here compared to sparc. | |
1065 | |
1066 if (src.is_single_phys_reg() ) { | |
1067 if (dst.is_single_phys_reg()) { | |
1068 if (dst.first() != src.first()) { | |
304 | 1069 __ mov(dst.first()->as_Register(), src.first()->as_Register()); |
0 | 1070 } |
1071 } else { | |
1072 assert(dst.is_single_reg(), "not a stack pair"); | |
1073 __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); | |
1074 } | |
1075 } else if (dst.is_single_phys_reg()) { | |
1076 assert(src.is_single_reg(), "not a stack pair"); | |
1077 __ movq(dst.first()->as_Register(), Address(rbp, reg2offset_out(src.first()))); | |
1078 } else { | |
1079 assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs"); | |
1080 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); | |
1081 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
1082 } | |
1083 } | |
1084 | |
1085 // A double move | |
1086 static void double_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1087 | |
1088 // The calling conventions assures us that each VMregpair is either | |
1089 // all really one physical register or adjacent stack slots. | |
1090 // This greatly simplifies the cases here compared to sparc. | |
1091 | |
1092 if (src.is_single_phys_reg() ) { | |
1093 if (dst.is_single_phys_reg()) { | |
1094 // In theory these overlap but the ordering is such that this is likely a nop | |
1095 if ( src.first() != dst.first()) { | |
1096 __ movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister()); | |
1097 } | |
1098 } else { | |
1099 assert(dst.is_single_reg(), "not a stack pair"); | |
1100 __ movdbl(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); | |
1101 } | |
1102 } else if (dst.is_single_phys_reg()) { | |
1103 assert(src.is_single_reg(), "not a stack pair"); | |
1104 __ movdbl(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_out(src.first()))); | |
1105 } else { | |
1106 assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs"); | |
1107 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); | |
1108 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
1109 } | |
1110 } | |
1111 | |
1112 | |
1113 void SharedRuntime::save_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1114 // We always ignore the frame_slots arg and just use the space just below frame pointer | |
1115 // which by this time is free to use | |
1116 switch (ret_type) { | |
1117 case T_FLOAT: | |
1118 __ movflt(Address(rbp, -wordSize), xmm0); | |
1119 break; | |
1120 case T_DOUBLE: | |
1121 __ movdbl(Address(rbp, -wordSize), xmm0); | |
1122 break; | |
1123 case T_VOID: break; | |
1124 default: { | |
304 | 1125 __ movptr(Address(rbp, -wordSize), rax); |
0 | 1126 } |
1127 } | |
1128 } | |
1129 | |
1130 void SharedRuntime::restore_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1131 // We always ignore the frame_slots arg and just use the space just below frame pointer | |
1132 // which by this time is free to use | |
1133 switch (ret_type) { | |
1134 case T_FLOAT: | |
1135 __ movflt(xmm0, Address(rbp, -wordSize)); | |
1136 break; | |
1137 case T_DOUBLE: | |
1138 __ movdbl(xmm0, Address(rbp, -wordSize)); | |
1139 break; | |
1140 case T_VOID: break; | |
1141 default: { | |
304 | 1142 __ movptr(rax, Address(rbp, -wordSize)); |
0 | 1143 } |
1144 } | |
1145 } | |
1146 | |
1147 static void save_args(MacroAssembler *masm, int arg_count, int first_arg, VMRegPair *args) { | |
1148 for ( int i = first_arg ; i < arg_count ; i++ ) { | |
1149 if (args[i].first()->is_Register()) { | |
304 | 1150 __ push(args[i].first()->as_Register()); |
0 | 1151 } else if (args[i].first()->is_XMMRegister()) { |
304 | 1152 __ subptr(rsp, 2*wordSize); |
0 | 1153 __ movdbl(Address(rsp, 0), args[i].first()->as_XMMRegister()); |
1154 } | |
1155 } | |
1156 } | |
1157 | |
1158 static void restore_args(MacroAssembler *masm, int arg_count, int first_arg, VMRegPair *args) { | |
1159 for ( int i = arg_count - 1 ; i >= first_arg ; i-- ) { | |
1160 if (args[i].first()->is_Register()) { | |
304 | 1161 __ pop(args[i].first()->as_Register()); |
0 | 1162 } else if (args[i].first()->is_XMMRegister()) { |
1163 __ movdbl(args[i].first()->as_XMMRegister(), Address(rsp, 0)); | |
304 | 1164 __ addptr(rsp, 2*wordSize); |
0 | 1165 } |
1166 } | |
1167 } | |
1168 | |
1169 // --------------------------------------------------------------------------- | |
1170 // Generate a native wrapper for a given method. The method takes arguments | |
1171 // in the Java compiled code convention, marshals them to the native | |
1172 // convention (handlizes oops, etc), transitions to native, makes the call, | |
1173 // returns to java state (possibly blocking), unhandlizes any result and | |
1174 // returns. | |
1175 nmethod *SharedRuntime::generate_native_wrapper(MacroAssembler *masm, | |
1176 methodHandle method, | |
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1177 int compile_id, |
0 | 1178 int total_in_args, |
1179 int comp_args_on_stack, | |
1180 BasicType *in_sig_bt, | |
1181 VMRegPair *in_regs, | |
1182 BasicType ret_type) { | |
1183 // Native nmethod wrappers never take possesion of the oop arguments. | |
1184 // So the caller will gc the arguments. The only thing we need an | |
1185 // oopMap for is if the call is static | |
1186 // | |
1187 // An OopMap for lock (and class if static) | |
1188 OopMapSet *oop_maps = new OopMapSet(); | |
1189 intptr_t start = (intptr_t)__ pc(); | |
1190 | |
1191 // We have received a description of where all the java arg are located | |
1192 // on entry to the wrapper. We need to convert these args to where | |
1193 // the jni function will expect them. To figure out where they go | |
1194 // we convert the java signature to a C signature by inserting | |
1195 // the hidden arguments as arg[0] and possibly arg[1] (static method) | |
1196 | |
1197 int total_c_args = total_in_args + 1; | |
1198 if (method->is_static()) { | |
1199 total_c_args++; | |
1200 } | |
1201 | |
1202 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_c_args); | |
1203 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_c_args); | |
1204 | |
1205 int argc = 0; | |
1206 out_sig_bt[argc++] = T_ADDRESS; | |
1207 if (method->is_static()) { | |
1208 out_sig_bt[argc++] = T_OBJECT; | |
1209 } | |
1210 | |
1211 for (int i = 0; i < total_in_args ; i++ ) { | |
1212 out_sig_bt[argc++] = in_sig_bt[i]; | |
1213 } | |
1214 | |
1215 // Now figure out where the args must be stored and how much stack space | |
1216 // they require. | |
1217 // | |
1218 int out_arg_slots; | |
1219 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); | |
1220 | |
1221 // Compute framesize for the wrapper. We need to handlize all oops in | |
1222 // incoming registers | |
1223 | |
1224 // Calculate the total number of stack slots we will need. | |
1225 | |
1226 // First count the abi requirement plus all of the outgoing args | |
1227 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; | |
1228 | |
1229 // Now the space for the inbound oop handle area | |
1230 | |
1231 int oop_handle_offset = stack_slots; | |
1232 stack_slots += 6*VMRegImpl::slots_per_word; | |
1233 | |
1234 // Now any space we need for handlizing a klass if static method | |
1235 | |
1236 int oop_temp_slot_offset = 0; | |
1237 int klass_slot_offset = 0; | |
1238 int klass_offset = -1; | |
1239 int lock_slot_offset = 0; | |
1240 bool is_static = false; | |
1241 | |
1242 if (method->is_static()) { | |
1243 klass_slot_offset = stack_slots; | |
1244 stack_slots += VMRegImpl::slots_per_word; | |
1245 klass_offset = klass_slot_offset * VMRegImpl::stack_slot_size; | |
1246 is_static = true; | |
1247 } | |
1248 | |
1249 // Plus a lock if needed | |
1250 | |
1251 if (method->is_synchronized()) { | |
1252 lock_slot_offset = stack_slots; | |
1253 stack_slots += VMRegImpl::slots_per_word; | |
1254 } | |
1255 | |
1256 // Now a place (+2) to save return values or temp during shuffling | |
1257 // + 4 for return address (which we own) and saved rbp | |
1258 stack_slots += 6; | |
1259 | |
1260 // Ok The space we have allocated will look like: | |
1261 // | |
1262 // | |
1263 // FP-> | | | |
1264 // |---------------------| | |
1265 // | 2 slots for moves | | |
1266 // |---------------------| | |
1267 // | lock box (if sync) | | |
1268 // |---------------------| <- lock_slot_offset | |
1269 // | klass (if static) | | |
1270 // |---------------------| <- klass_slot_offset | |
1271 // | oopHandle area | | |
1272 // |---------------------| <- oop_handle_offset (6 java arg registers) | |
1273 // | outbound memory | | |
1274 // | based arguments | | |
1275 // | | | |
1276 // |---------------------| | |
1277 // | | | |
1278 // SP-> | out_preserved_slots | | |
1279 // | |
1280 // | |
1281 | |
1282 | |
1283 // Now compute actual number of stack words we need rounding to make | |
1284 // stack properly aligned. | |
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1285 stack_slots = round_to(stack_slots, StackAlignmentInSlots); |
0 | 1286 |
1287 int stack_size = stack_slots * VMRegImpl::stack_slot_size; | |
1288 | |
1289 | |
1290 // First thing make an ic check to see if we should even be here | |
1291 | |
1292 // We are free to use all registers as temps without saving them and | |
1293 // restoring them except rbp. rbp is the only callee save register | |
1294 // as far as the interpreter and the compiler(s) are concerned. | |
1295 | |
1296 | |
1297 const Register ic_reg = rax; | |
1298 const Register receiver = j_rarg0; | |
1299 | |
1300 Label ok; | |
1301 Label exception_pending; | |
1302 | |
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1303 assert_different_registers(ic_reg, receiver, rscratch1); |
0 | 1304 __ verify_oop(receiver); |
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1305 __ load_klass(rscratch1, receiver); |
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1306 __ cmpq(ic_reg, rscratch1); |
0 | 1307 __ jcc(Assembler::equal, ok); |
1308 | |
1309 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
1310 | |
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1311 __ bind(ok); |
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1312 |
0 | 1313 // Verified entry point must be aligned |
1314 __ align(8); | |
1315 | |
1316 int vep_offset = ((intptr_t)__ pc()) - start; | |
1317 | |
1318 // The instruction at the verified entry point must be 5 bytes or longer | |
1319 // because it can be patched on the fly by make_non_entrant. The stack bang | |
1320 // instruction fits that requirement. | |
1321 | |
1322 // Generate stack overflow check | |
1323 | |
1324 if (UseStackBanging) { | |
1325 __ bang_stack_with_offset(StackShadowPages*os::vm_page_size()); | |
1326 } else { | |
1327 // need a 5 byte instruction to allow MT safe patching to non-entrant | |
1328 __ fat_nop(); | |
1329 } | |
1330 | |
1331 // Generate a new frame for the wrapper. | |
1332 __ enter(); | |
1333 // -2 because return address is already present and so is saved rbp | |
304 | 1334 __ subptr(rsp, stack_size - 2*wordSize); |
0 | 1335 |
1336 // Frame is now completed as far as size and linkage. | |
1337 | |
1338 int frame_complete = ((intptr_t)__ pc()) - start; | |
1339 | |
1340 #ifdef ASSERT | |
1341 { | |
1342 Label L; | |
304 | 1343 __ mov(rax, rsp); |
605 | 1344 __ andptr(rax, -16); // must be 16 byte boundary (see amd64 ABI) |
304 | 1345 __ cmpptr(rax, rsp); |
0 | 1346 __ jcc(Assembler::equal, L); |
1347 __ stop("improperly aligned stack"); | |
1348 __ bind(L); | |
1349 } | |
1350 #endif /* ASSERT */ | |
1351 | |
1352 | |
1353 // We use r14 as the oop handle for the receiver/klass | |
1354 // It is callee save so it survives the call to native | |
1355 | |
1356 const Register oop_handle_reg = r14; | |
1357 | |
1358 | |
1359 | |
1360 // | |
1361 // We immediately shuffle the arguments so that any vm call we have to | |
1362 // make from here on out (sync slow path, jvmti, etc.) we will have | |
1363 // captured the oops from our caller and have a valid oopMap for | |
1364 // them. | |
1365 | |
1366 // ----------------- | |
1367 // The Grand Shuffle | |
1368 | |
1369 // The Java calling convention is either equal (linux) or denser (win64) than the | |
1370 // c calling convention. However the because of the jni_env argument the c calling | |
1371 // convention always has at least one more (and two for static) arguments than Java. | |
1372 // Therefore if we move the args from java -> c backwards then we will never have | |
1373 // a register->register conflict and we don't have to build a dependency graph | |
1374 // and figure out how to break any cycles. | |
1375 // | |
1376 | |
1377 // Record esp-based slot for receiver on stack for non-static methods | |
1378 int receiver_offset = -1; | |
1379 | |
1380 // This is a trick. We double the stack slots so we can claim | |
1381 // the oops in the caller's frame. Since we are sure to have | |
1382 // more args than the caller doubling is enough to make | |
1383 // sure we can capture all the incoming oop args from the | |
1384 // caller. | |
1385 // | |
1386 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); | |
1387 | |
1388 // Mark location of rbp (someday) | |
1389 // map->set_callee_saved(VMRegImpl::stack2reg( stack_slots - 2), stack_slots * 2, 0, vmreg(rbp)); | |
1390 | |
1391 // Use eax, ebx as temporaries during any memory-memory moves we have to do | |
1392 // All inbound args are referenced based on rbp and all outbound args via rsp. | |
1393 | |
1394 | |
1395 #ifdef ASSERT | |
1396 bool reg_destroyed[RegisterImpl::number_of_registers]; | |
1397 bool freg_destroyed[XMMRegisterImpl::number_of_registers]; | |
1398 for ( int r = 0 ; r < RegisterImpl::number_of_registers ; r++ ) { | |
1399 reg_destroyed[r] = false; | |
1400 } | |
1401 for ( int f = 0 ; f < XMMRegisterImpl::number_of_registers ; f++ ) { | |
1402 freg_destroyed[f] = false; | |
1403 } | |
1404 | |
1405 #endif /* ASSERT */ | |
1406 | |
1407 | |
1408 int c_arg = total_c_args - 1; | |
1409 for ( int i = total_in_args - 1; i >= 0 ; i--, c_arg-- ) { | |
1410 #ifdef ASSERT | |
1411 if (in_regs[i].first()->is_Register()) { | |
1412 assert(!reg_destroyed[in_regs[i].first()->as_Register()->encoding()], "destroyed reg!"); | |
1413 } else if (in_regs[i].first()->is_XMMRegister()) { | |
1414 assert(!freg_destroyed[in_regs[i].first()->as_XMMRegister()->encoding()], "destroyed reg!"); | |
1415 } | |
1416 if (out_regs[c_arg].first()->is_Register()) { | |
1417 reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true; | |
1418 } else if (out_regs[c_arg].first()->is_XMMRegister()) { | |
1419 freg_destroyed[out_regs[c_arg].first()->as_XMMRegister()->encoding()] = true; | |
1420 } | |
1421 #endif /* ASSERT */ | |
1422 switch (in_sig_bt[i]) { | |
1423 case T_ARRAY: | |
1424 case T_OBJECT: | |
1425 object_move(masm, map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg], | |
1426 ((i == 0) && (!is_static)), | |
1427 &receiver_offset); | |
1428 break; | |
1429 case T_VOID: | |
1430 break; | |
1431 | |
1432 case T_FLOAT: | |
1433 float_move(masm, in_regs[i], out_regs[c_arg]); | |
1434 break; | |
1435 | |
1436 case T_DOUBLE: | |
1437 assert( i + 1 < total_in_args && | |
1438 in_sig_bt[i + 1] == T_VOID && | |
1439 out_sig_bt[c_arg+1] == T_VOID, "bad arg list"); | |
1440 double_move(masm, in_regs[i], out_regs[c_arg]); | |
1441 break; | |
1442 | |
1443 case T_LONG : | |
1444 long_move(masm, in_regs[i], out_regs[c_arg]); | |
1445 break; | |
1446 | |
1447 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); | |
1448 | |
1449 default: | |
1450 move32_64(masm, in_regs[i], out_regs[c_arg]); | |
1451 } | |
1452 } | |
1453 | |
1454 // point c_arg at the first arg that is already loaded in case we | |
1455 // need to spill before we call out | |
1456 c_arg++; | |
1457 | |
1458 // Pre-load a static method's oop into r14. Used both by locking code and | |
1459 // the normal JNI call code. | |
1460 if (method->is_static()) { | |
1461 | |
1462 // load oop into a register | |
1463 __ movoop(oop_handle_reg, JNIHandles::make_local(Klass::cast(method->method_holder())->java_mirror())); | |
1464 | |
1465 // Now handlize the static class mirror it's known not-null. | |
304 | 1466 __ movptr(Address(rsp, klass_offset), oop_handle_reg); |
0 | 1467 map->set_oop(VMRegImpl::stack2reg(klass_slot_offset)); |
1468 | |
1469 // Now get the handle | |
304 | 1470 __ lea(oop_handle_reg, Address(rsp, klass_offset)); |
0 | 1471 // store the klass handle as second argument |
304 | 1472 __ movptr(c_rarg1, oop_handle_reg); |
0 | 1473 // and protect the arg if we must spill |
1474 c_arg--; | |
1475 } | |
1476 | |
1477 // Change state to native (we save the return address in the thread, since it might not | |
1478 // be pushed on the stack when we do a a stack traversal). It is enough that the pc() | |
1479 // points into the right code segment. It does not have to be the correct return pc. | |
1480 // We use the same pc/oopMap repeatedly when we call out | |
1481 | |
1482 intptr_t the_pc = (intptr_t) __ pc(); | |
1483 oop_maps->add_gc_map(the_pc - start, map); | |
1484 | |
1485 __ set_last_Java_frame(rsp, noreg, (address)the_pc); | |
1486 | |
1487 | |
1488 // We have all of the arguments setup at this point. We must not touch any register | |
1489 // argument registers at this point (what if we save/restore them there are no oop? | |
1490 | |
1491 { | |
1492 SkipIfEqual skip(masm, &DTraceMethodProbes, false); | |
1493 // protect the args we've loaded | |
1494 save_args(masm, total_c_args, c_arg, out_regs); | |
1495 __ movoop(c_rarg1, JNIHandles::make_local(method())); | |
1496 __ call_VM_leaf( | |
1497 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
1498 r15_thread, c_rarg1); | |
1499 restore_args(masm, total_c_args, c_arg, out_regs); | |
1500 } | |
1501 | |
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1502 // RedefineClasses() tracing support for obsolete method entry |
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1503 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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1504 // protect the args we've loaded |
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1505 save_args(masm, total_c_args, c_arg, out_regs); |
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1506 __ movoop(c_rarg1, JNIHandles::make_local(method())); |
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1507 __ call_VM_leaf( |
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1508 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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1509 r15_thread, c_rarg1); |
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1510 restore_args(masm, total_c_args, c_arg, out_regs); |
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1511 } |
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1512 |
0 | 1513 // Lock a synchronized method |
1514 | |
1515 // Register definitions used by locking and unlocking | |
1516 | |
1517 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
1518 const Register obj_reg = rbx; // Will contain the oop | |
1519 const Register lock_reg = r13; // Address of compiler lock object (BasicLock) | |
1520 const Register old_hdr = r13; // value of old header at unlock time | |
1521 | |
1522 Label slow_path_lock; | |
1523 Label lock_done; | |
1524 | |
1525 if (method->is_synchronized()) { | |
1526 | |
1527 | |
1528 const int mark_word_offset = BasicLock::displaced_header_offset_in_bytes(); | |
1529 | |
1530 // Get the handle (the 2nd argument) | |
304 | 1531 __ mov(oop_handle_reg, c_rarg1); |
0 | 1532 |
1533 // Get address of the box | |
1534 | |
304 | 1535 __ lea(lock_reg, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
0 | 1536 |
1537 // Load the oop from the handle | |
304 | 1538 __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
0 | 1539 |
1540 if (UseBiasedLocking) { | |
1541 __ biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, lock_done, &slow_path_lock); | |
1542 } | |
1543 | |
1544 // Load immediate 1 into swap_reg %rax | |
1545 __ movl(swap_reg, 1); | |
1546 | |
1547 // Load (object->mark() | 1) into swap_reg %rax | |
304 | 1548 __ orptr(swap_reg, Address(obj_reg, 0)); |
0 | 1549 |
1550 // Save (object->mark() | 1) into BasicLock's displaced header | |
304 | 1551 __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
0 | 1552 |
1553 if (os::is_MP()) { | |
1554 __ lock(); | |
1555 } | |
1556 | |
1557 // src -> dest iff dest == rax else rax <- dest | |
304 | 1558 __ cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
0 | 1559 __ jcc(Assembler::equal, lock_done); |
1560 | |
1561 // Hmm should this move to the slow path code area??? | |
1562 | |
1563 // Test if the oopMark is an obvious stack pointer, i.e., | |
1564 // 1) (mark & 3) == 0, and | |
1565 // 2) rsp <= mark < mark + os::pagesize() | |
1566 // These 3 tests can be done by evaluating the following | |
1567 // expression: ((mark - rsp) & (3 - os::vm_page_size())), | |
1568 // assuming both stack pointer and pagesize have their | |
1569 // least significant 2 bits clear. | |
1570 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg | |
1571 | |
304 | 1572 __ subptr(swap_reg, rsp); |
1573 __ andptr(swap_reg, 3 - os::vm_page_size()); | |
0 | 1574 |
1575 // Save the test result, for recursive case, the result is zero | |
304 | 1576 __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
0 | 1577 __ jcc(Assembler::notEqual, slow_path_lock); |
1578 | |
1579 // Slow path will re-enter here | |
1580 | |
1581 __ bind(lock_done); | |
1582 } | |
1583 | |
1584 | |
1585 // Finally just about ready to make the JNI call | |
1586 | |
1587 | |
1588 // get JNIEnv* which is first argument to native | |
1589 | |
304 | 1590 __ lea(c_rarg0, Address(r15_thread, in_bytes(JavaThread::jni_environment_offset()))); |
0 | 1591 |
1592 // Now set thread in native | |
304 | 1593 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_native); |
0 | 1594 |
1595 __ call(RuntimeAddress(method->native_function())); | |
1596 | |
1597 // Either restore the MXCSR register after returning from the JNI Call | |
1598 // or verify that it wasn't changed. | |
1599 if (RestoreMXCSROnJNICalls) { | |
304 | 1600 __ ldmxcsr(ExternalAddress(StubRoutines::x86::mxcsr_std())); |
0 | 1601 |
1602 } | |
1603 else if (CheckJNICalls ) { | |
304 | 1604 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::verify_mxcsr_entry()))); |
0 | 1605 } |
1606 | |
1607 | |
1608 // Unpack native results. | |
1609 switch (ret_type) { | |
1610 case T_BOOLEAN: __ c2bool(rax); break; | |
1611 case T_CHAR : __ movzwl(rax, rax); break; | |
1612 case T_BYTE : __ sign_extend_byte (rax); break; | |
1613 case T_SHORT : __ sign_extend_short(rax); break; | |
1614 case T_INT : /* nothing to do */ break; | |
1615 case T_DOUBLE : | |
1616 case T_FLOAT : | |
1617 // Result is in xmm0 we'll save as needed | |
1618 break; | |
1619 case T_ARRAY: // Really a handle | |
1620 case T_OBJECT: // Really a handle | |
1621 break; // can't de-handlize until after safepoint check | |
1622 case T_VOID: break; | |
1623 case T_LONG: break; | |
1624 default : ShouldNotReachHere(); | |
1625 } | |
1626 | |
1627 // Switch thread to "native transition" state before reading the synchronization state. | |
1628 // This additional state is necessary because reading and testing the synchronization | |
1629 // state is not atomic w.r.t. GC, as this scenario demonstrates: | |
1630 // Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted. | |
1631 // VM thread changes sync state to synchronizing and suspends threads for GC. | |
1632 // Thread A is resumed to finish this native method, but doesn't block here since it | |
1633 // didn't see any synchronization is progress, and escapes. | |
304 | 1634 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_native_trans); |
0 | 1635 |
1636 if(os::is_MP()) { | |
1637 if (UseMembar) { | |
1638 // Force this write out before the read below | |
1639 __ membar(Assembler::Membar_mask_bits( | |
1640 Assembler::LoadLoad | Assembler::LoadStore | | |
1641 Assembler::StoreLoad | Assembler::StoreStore)); | |
1642 } else { | |
1643 // Write serialization page so VM thread can do a pseudo remote membar. | |
1644 // We use the current thread pointer to calculate a thread specific | |
1645 // offset to write to within the page. This minimizes bus traffic | |
1646 // due to cache line collision. | |
1647 __ serialize_memory(r15_thread, rcx); | |
1648 } | |
1649 } | |
1650 | |
1651 | |
1652 // check for safepoint operation in progress and/or pending suspend requests | |
1653 { | |
1654 Label Continue; | |
1655 | |
1656 __ cmp32(ExternalAddress((address)SafepointSynchronize::address_of_state()), | |
1657 SafepointSynchronize::_not_synchronized); | |
1658 | |
1659 Label L; | |
1660 __ jcc(Assembler::notEqual, L); | |
1661 __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0); | |
1662 __ jcc(Assembler::equal, Continue); | |
1663 __ bind(L); | |
1664 | |
1665 // Don't use call_VM as it will see a possible pending exception and forward it | |
1666 // and never return here preventing us from clearing _last_native_pc down below. | |
1667 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are | |
1668 // preserved and correspond to the bcp/locals pointers. So we do a runtime call | |
1669 // by hand. | |
1670 // | |
1671 save_native_result(masm, ret_type, stack_slots); | |
304 | 1672 __ mov(c_rarg0, r15_thread); |
1673 __ mov(r12, rsp); // remember sp | |
1674 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
1675 __ andptr(rsp, -16); // align stack as required by ABI | |
0 | 1676 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans))); |
304 | 1677 __ mov(rsp, r12); // restore sp |
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1678 __ reinit_heapbase(); |
0 | 1679 // Restore any method result value |
1680 restore_native_result(masm, ret_type, stack_slots); | |
1681 __ bind(Continue); | |
1682 } | |
1683 | |
1684 // change thread state | |
1685 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_Java); | |
1686 | |
1687 Label reguard; | |
1688 Label reguard_done; | |
1689 __ cmpl(Address(r15_thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled); | |
1690 __ jcc(Assembler::equal, reguard); | |
1691 __ bind(reguard_done); | |
1692 | |
1693 // native result if any is live | |
1694 | |
1695 // Unlock | |
1696 Label unlock_done; | |
1697 Label slow_path_unlock; | |
1698 if (method->is_synchronized()) { | |
1699 | |
1700 // Get locked oop from the handle we passed to jni | |
304 | 1701 __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
0 | 1702 |
1703 Label done; | |
1704 | |
1705 if (UseBiasedLocking) { | |
1706 __ biased_locking_exit(obj_reg, old_hdr, done); | |
1707 } | |
1708 | |
1709 // Simple recursive lock? | |
1710 | |
304 | 1711 __ cmpptr(Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size), (int32_t)NULL_WORD); |
0 | 1712 __ jcc(Assembler::equal, done); |
1713 | |
1714 // Must save rax if if it is live now because cmpxchg must use it | |
1715 if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { | |
1716 save_native_result(masm, ret_type, stack_slots); | |
1717 } | |
1718 | |
1719 | |
1720 // get address of the stack lock | |
304 | 1721 __ lea(rax, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
0 | 1722 // get old displaced header |
304 | 1723 __ movptr(old_hdr, Address(rax, 0)); |
0 | 1724 |
1725 // Atomic swap old header if oop still contains the stack lock | |
1726 if (os::is_MP()) { | |
1727 __ lock(); | |
1728 } | |
304 | 1729 __ cmpxchgptr(old_hdr, Address(obj_reg, 0)); |
0 | 1730 __ jcc(Assembler::notEqual, slow_path_unlock); |
1731 | |
1732 // slow path re-enters here | |
1733 __ bind(unlock_done); | |
1734 if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { | |
1735 restore_native_result(masm, ret_type, stack_slots); | |
1736 } | |
1737 | |
1738 __ bind(done); | |
1739 | |
1740 } | |
1741 { | |
1742 SkipIfEqual skip(masm, &DTraceMethodProbes, false); | |
1743 save_native_result(masm, ret_type, stack_slots); | |
1744 __ movoop(c_rarg1, JNIHandles::make_local(method())); | |
1745 __ call_VM_leaf( | |
1746 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
1747 r15_thread, c_rarg1); | |
1748 restore_native_result(masm, ret_type, stack_slots); | |
1749 } | |
1750 | |
1751 __ reset_last_Java_frame(false, true); | |
1752 | |
1753 // Unpack oop result | |
1754 if (ret_type == T_OBJECT || ret_type == T_ARRAY) { | |
1755 Label L; | |
304 | 1756 __ testptr(rax, rax); |
0 | 1757 __ jcc(Assembler::zero, L); |
304 | 1758 __ movptr(rax, Address(rax, 0)); |
0 | 1759 __ bind(L); |
1760 __ verify_oop(rax); | |
1761 } | |
1762 | |
1763 // reset handle block | |
304 | 1764 __ movptr(rcx, Address(r15_thread, JavaThread::active_handles_offset())); |
1765 __ movptr(Address(rcx, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD); | |
0 | 1766 |
1767 // pop our frame | |
1768 | |
1769 __ leave(); | |
1770 | |
1771 // Any exception pending? | |
304 | 1772 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
0 | 1773 __ jcc(Assembler::notEqual, exception_pending); |
1774 | |
1775 // Return | |
1776 | |
1777 __ ret(0); | |
1778 | |
1779 // Unexpected paths are out of line and go here | |
1780 | |
1781 // forward the exception | |
1782 __ bind(exception_pending); | |
1783 | |
1784 // and forward the exception | |
1785 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
1786 | |
1787 | |
1788 // Slow path locking & unlocking | |
1789 if (method->is_synchronized()) { | |
1790 | |
1791 // BEGIN Slow path lock | |
1792 __ bind(slow_path_lock); | |
1793 | |
1794 // has last_Java_frame setup. No exceptions so do vanilla call not call_VM | |
1795 // args are (oop obj, BasicLock* lock, JavaThread* thread) | |
1796 | |
1797 // protect the args we've loaded | |
1798 save_args(masm, total_c_args, c_arg, out_regs); | |
1799 | |
304 | 1800 __ mov(c_rarg0, obj_reg); |
1801 __ mov(c_rarg1, lock_reg); | |
1802 __ mov(c_rarg2, r15_thread); | |
0 | 1803 |
1804 // Not a leaf but we have last_Java_frame setup as we want | |
1805 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_locking_C), 3); | |
1806 restore_args(masm, total_c_args, c_arg, out_regs); | |
1807 | |
1808 #ifdef ASSERT | |
1809 { Label L; | |
304 | 1810 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
0 | 1811 __ jcc(Assembler::equal, L); |
1812 __ stop("no pending exception allowed on exit from monitorenter"); | |
1813 __ bind(L); | |
1814 } | |
1815 #endif | |
1816 __ jmp(lock_done); | |
1817 | |
1818 // END Slow path lock | |
1819 | |
1820 // BEGIN Slow path unlock | |
1821 __ bind(slow_path_unlock); | |
1822 | |
1823 // If we haven't already saved the native result we must save it now as xmm registers | |
1824 // are still exposed. | |
1825 | |
1826 if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { | |
1827 save_native_result(masm, ret_type, stack_slots); | |
1828 } | |
1829 | |
304 | 1830 __ lea(c_rarg1, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
1831 | |
1832 __ mov(c_rarg0, obj_reg); | |
1833 __ mov(r12, rsp); // remember sp | |
1834 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
1835 __ andptr(rsp, -16); // align stack as required by ABI | |
0 | 1836 |
1837 // Save pending exception around call to VM (which contains an EXCEPTION_MARK) | |
1838 // NOTE that obj_reg == rbx currently | |
304 | 1839 __ movptr(rbx, Address(r15_thread, in_bytes(Thread::pending_exception_offset()))); |
1840 __ movptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); | |
0 | 1841 |
1842 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_unlocking_C))); | |
304 | 1843 __ mov(rsp, r12); // restore sp |
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1844 __ reinit_heapbase(); |
0 | 1845 #ifdef ASSERT |
1846 { | |
1847 Label L; | |
304 | 1848 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int)NULL_WORD); |
0 | 1849 __ jcc(Assembler::equal, L); |
1850 __ stop("no pending exception allowed on exit complete_monitor_unlocking_C"); | |
1851 __ bind(L); | |
1852 } | |
1853 #endif /* ASSERT */ | |
1854 | |
304 | 1855 __ movptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), rbx); |
0 | 1856 |
1857 if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { | |
1858 restore_native_result(masm, ret_type, stack_slots); | |
1859 } | |
1860 __ jmp(unlock_done); | |
1861 | |
1862 // END Slow path unlock | |
1863 | |
1864 } // synchronized | |
1865 | |
1866 // SLOW PATH Reguard the stack if needed | |
1867 | |
1868 __ bind(reguard); | |
1869 save_native_result(masm, ret_type, stack_slots); | |
304 | 1870 __ mov(r12, rsp); // remember sp |
1871 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
1872 __ andptr(rsp, -16); // align stack as required by ABI | |
0 | 1873 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); |
304 | 1874 __ mov(rsp, r12); // restore sp |
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1875 __ reinit_heapbase(); |
0 | 1876 restore_native_result(masm, ret_type, stack_slots); |
1877 // and continue | |
1878 __ jmp(reguard_done); | |
1879 | |
1880 | |
1881 | |
1882 __ flush(); | |
1883 | |
1884 nmethod *nm = nmethod::new_native_nmethod(method, | |
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1885 compile_id, |
0 | 1886 masm->code(), |
1887 vep_offset, | |
1888 frame_complete, | |
1889 stack_slots / VMRegImpl::slots_per_word, | |
1890 (is_static ? in_ByteSize(klass_offset) : in_ByteSize(receiver_offset)), | |
1891 in_ByteSize(lock_slot_offset*VMRegImpl::stack_slot_size), | |
1892 oop_maps); | |
1893 return nm; | |
1894 | |
1895 } | |
1896 | |
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1897 #ifdef HAVE_DTRACE_H |
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1898 // --------------------------------------------------------------------------- |
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1899 // Generate a dtrace nmethod for a given signature. The method takes arguments |
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1900 // in the Java compiled code convention, marshals them to the native |
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1901 // abi and then leaves nops at the position you would expect to call a native |
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1902 // function. When the probe is enabled the nops are replaced with a trap |
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1903 // instruction that dtrace inserts and the trace will cause a notification |
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1904 // to dtrace. |
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1905 // |
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1906 // The probes are only able to take primitive types and java/lang/String as |
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1907 // arguments. No other java types are allowed. Strings are converted to utf8 |
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1908 // strings so that from dtrace point of view java strings are converted to C |
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1909 // strings. There is an arbitrary fixed limit on the total space that a method |
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1910 // can use for converting the strings. (256 chars per string in the signature). |
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1911 // So any java string larger then this is truncated. |
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1912 |
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1913 static int fp_offset[ConcreteRegisterImpl::number_of_registers] = { 0 }; |
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1914 static bool offsets_initialized = false; |
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1915 |
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1916 |
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1917 nmethod *SharedRuntime::generate_dtrace_nmethod(MacroAssembler *masm, |
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1918 methodHandle method) { |
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1919 |
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1920 |
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1921 // generate_dtrace_nmethod is guarded by a mutex so we are sure to |
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1922 // be single threaded in this method. |
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1923 assert(AdapterHandlerLibrary_lock->owned_by_self(), "must be"); |
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1924 |
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1925 if (!offsets_initialized) { |
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1926 fp_offset[c_rarg0->as_VMReg()->value()] = -1 * wordSize; |
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1927 fp_offset[c_rarg1->as_VMReg()->value()] = -2 * wordSize; |
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1928 fp_offset[c_rarg2->as_VMReg()->value()] = -3 * wordSize; |
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1929 fp_offset[c_rarg3->as_VMReg()->value()] = -4 * wordSize; |
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1930 fp_offset[c_rarg4->as_VMReg()->value()] = -5 * wordSize; |
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1931 fp_offset[c_rarg5->as_VMReg()->value()] = -6 * wordSize; |
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1932 |
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1933 fp_offset[c_farg0->as_VMReg()->value()] = -7 * wordSize; |
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1934 fp_offset[c_farg1->as_VMReg()->value()] = -8 * wordSize; |
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1935 fp_offset[c_farg2->as_VMReg()->value()] = -9 * wordSize; |
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1936 fp_offset[c_farg3->as_VMReg()->value()] = -10 * wordSize; |
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1937 fp_offset[c_farg4->as_VMReg()->value()] = -11 * wordSize; |
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1938 fp_offset[c_farg5->as_VMReg()->value()] = -12 * wordSize; |
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1939 fp_offset[c_farg6->as_VMReg()->value()] = -13 * wordSize; |
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1940 fp_offset[c_farg7->as_VMReg()->value()] = -14 * wordSize; |
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1941 |
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1942 offsets_initialized = true; |
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1943 } |
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1944 // Fill in the signature array, for the calling-convention call. |
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1945 int total_args_passed = method->size_of_parameters(); |
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1946 |
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1947 BasicType* in_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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1948 VMRegPair *in_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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1949 |
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1950 // The signature we are going to use for the trap that dtrace will see |
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1951 // java/lang/String is converted. We drop "this" and any other object |
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1952 // is converted to NULL. (A one-slot java/lang/Long object reference |
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1953 // is converted to a two-slot long, which is why we double the allocation). |
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1954 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed * 2); |
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1955 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed * 2); |
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1956 |
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1957 int i=0; |
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1958 int total_strings = 0; |
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1959 int first_arg_to_pass = 0; |
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1960 int total_c_args = 0; |
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1961 |
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1962 // Skip the receiver as dtrace doesn't want to see it |
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1963 if( !method->is_static() ) { |
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1964 in_sig_bt[i++] = T_OBJECT; |
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1965 first_arg_to_pass = 1; |
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1966 } |
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1967 |
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1968 // We need to convert the java args to where a native (non-jni) function |
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1969 // would expect them. To figure out where they go we convert the java |
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1970 // signature to a C signature. |
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1971 |
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1972 SignatureStream ss(method->signature()); |
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1973 for ( ; !ss.at_return_type(); ss.next()) { |
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1974 BasicType bt = ss.type(); |
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1975 in_sig_bt[i++] = bt; // Collect remaining bits of signature |
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1976 out_sig_bt[total_c_args++] = bt; |
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1977 if( bt == T_OBJECT) { |
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1978 Symbol* s = ss.as_symbol_or_null(); // symbol is created |
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1979 if (s == vmSymbols::java_lang_String()) { |
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1980 total_strings++; |
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1981 out_sig_bt[total_c_args-1] = T_ADDRESS; |
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1982 } else if (s == vmSymbols::java_lang_Boolean() || |
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1983 s == vmSymbols::java_lang_Character() || |
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1984 s == vmSymbols::java_lang_Byte() || |
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1985 s == vmSymbols::java_lang_Short() || |
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1986 s == vmSymbols::java_lang_Integer() || |
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1987 s == vmSymbols::java_lang_Float()) { |
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1988 out_sig_bt[total_c_args-1] = T_INT; |
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1989 } else if (s == vmSymbols::java_lang_Long() || |
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1990 s == vmSymbols::java_lang_Double()) { |
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1991 out_sig_bt[total_c_args-1] = T_LONG; |
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1992 out_sig_bt[total_c_args++] = T_VOID; |
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1993 } |
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1994 } else if ( bt == T_LONG || bt == T_DOUBLE ) { |
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1995 in_sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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1996 // We convert double to long |
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1997 out_sig_bt[total_c_args-1] = T_LONG; |
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1998 out_sig_bt[total_c_args++] = T_VOID; |
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1999 } else if ( bt == T_FLOAT) { |
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2000 // We convert float to int |
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2001 out_sig_bt[total_c_args-1] = T_INT; |
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2002 } |
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2003 } |
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2004 |
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2005 assert(i==total_args_passed, "validly parsed signature"); |
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2006 |
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2007 // Now get the compiled-Java layout as input arguments |
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2008 int comp_args_on_stack; |
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2009 comp_args_on_stack = SharedRuntime::java_calling_convention( |
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2010 in_sig_bt, in_regs, total_args_passed, false); |
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2011 |
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2012 // Now figure out where the args must be stored and how much stack space |
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2013 // they require (neglecting out_preserve_stack_slots but space for storing |
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2014 // the 1st six register arguments). It's weird see int_stk_helper. |
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2015 |
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2016 int out_arg_slots; |
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2017 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); |
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2018 |
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2019 // Calculate the total number of stack slots we will need. |
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2020 |
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2021 // First count the abi requirement plus all of the outgoing args |
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2022 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; |
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2023 |
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2024 // Now space for the string(s) we must convert |
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2025 int* string_locs = NEW_RESOURCE_ARRAY(int, total_strings + 1); |
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2026 for (i = 0; i < total_strings ; i++) { |
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2027 string_locs[i] = stack_slots; |
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2028 stack_slots += max_dtrace_string_size / VMRegImpl::stack_slot_size; |
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2029 } |
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2030 |
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2031 // Plus the temps we might need to juggle register args |
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2032 // regs take two slots each |
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2033 stack_slots += (Argument::n_int_register_parameters_c + |
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2034 Argument::n_float_register_parameters_c) * 2; |
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2035 |
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2036 |
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2037 // + 4 for return address (which we own) and saved rbp, |
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2038 |
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2039 stack_slots += 4; |
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2040 |
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2041 // Ok The space we have allocated will look like: |
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2042 // |
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2043 // |
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2044 // FP-> | | |
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2045 // |---------------------| |
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2046 // | string[n] | |
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2047 // |---------------------| <- string_locs[n] |
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2048 // | string[n-1] | |
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2049 // |---------------------| <- string_locs[n-1] |
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2050 // | ... | |
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2051 // | ... | |
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2052 // |---------------------| <- string_locs[1] |
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2053 // | string[0] | |
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2054 // |---------------------| <- string_locs[0] |
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2055 // | outbound memory | |
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2056 // | based arguments | |
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2057 // | | |
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2058 // |---------------------| |
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2059 // | | |
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2060 // SP-> | out_preserved_slots | |
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2061 // |
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2062 // |
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2063 |
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2064 // Now compute actual number of stack words we need rounding to make |
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2065 // stack properly aligned. |
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2066 stack_slots = round_to(stack_slots, 4 * VMRegImpl::slots_per_word); |
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2067 |
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2068 int stack_size = stack_slots * VMRegImpl::stack_slot_size; |
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2069 |
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2070 intptr_t start = (intptr_t)__ pc(); |
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2071 |
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2072 // First thing make an ic check to see if we should even be here |
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2073 |
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2074 // We are free to use all registers as temps without saving them and |
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2075 // restoring them except rbp. rbp, is the only callee save register |
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2076 // as far as the interpreter and the compiler(s) are concerned. |
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2077 |
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2078 const Register ic_reg = rax; |
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2079 const Register receiver = rcx; |
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2080 Label hit; |
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2081 Label exception_pending; |
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2082 |
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2083 |
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2084 __ verify_oop(receiver); |
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2085 __ cmpl(ic_reg, Address(receiver, oopDesc::klass_offset_in_bytes())); |
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2086 __ jcc(Assembler::equal, hit); |
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2087 |
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2088 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); |
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2089 |
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2090 // verified entry must be aligned for code patching. |
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2091 // and the first 5 bytes must be in the same cache line |
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2092 // if we align at 8 then we will be sure 5 bytes are in the same line |
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2093 __ align(8); |
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2094 |
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2095 __ bind(hit); |
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2096 |
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2097 int vep_offset = ((intptr_t)__ pc()) - start; |
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2098 |
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2099 |
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2100 // The instruction at the verified entry point must be 5 bytes or longer |
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2101 // because it can be patched on the fly by make_non_entrant. The stack bang |
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2102 // instruction fits that requirement. |
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2103 |
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2104 // Generate stack overflow check |
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2105 |
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2106 if (UseStackBanging) { |
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2107 if (stack_size <= StackShadowPages*os::vm_page_size()) { |
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2108 __ bang_stack_with_offset(StackShadowPages*os::vm_page_size()); |
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2109 } else { |
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2110 __ movl(rax, stack_size); |
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2111 __ bang_stack_size(rax, rbx); |
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2112 } |
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2113 } else { |
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2114 // need a 5 byte instruction to allow MT safe patching to non-entrant |
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2115 __ fat_nop(); |
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2116 } |
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2117 |
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2118 assert(((uintptr_t)__ pc() - start - vep_offset) >= 5, |
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2119 "valid size for make_non_entrant"); |
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2120 |
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2121 // Generate a new frame for the wrapper. |
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2122 __ enter(); |
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2123 |
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2124 // -4 because return address is already present and so is saved rbp, |
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2125 if (stack_size - 2*wordSize != 0) { |
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2126 __ subq(rsp, stack_size - 2*wordSize); |
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2127 } |
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2128 |
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2129 // Frame is now completed as far a size and linkage. |
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2130 |
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2131 int frame_complete = ((intptr_t)__ pc()) - start; |
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2132 |
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2133 int c_arg, j_arg; |
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2134 |
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2135 // State of input register args |
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2136 |
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2137 bool live[ConcreteRegisterImpl::number_of_registers]; |
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2138 |
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2139 live[j_rarg0->as_VMReg()->value()] = false; |
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2140 live[j_rarg1->as_VMReg()->value()] = false; |
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2141 live[j_rarg2->as_VMReg()->value()] = false; |
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2142 live[j_rarg3->as_VMReg()->value()] = false; |
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2143 live[j_rarg4->as_VMReg()->value()] = false; |
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2144 live[j_rarg5->as_VMReg()->value()] = false; |
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2145 |
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2146 live[j_farg0->as_VMReg()->value()] = false; |
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2147 live[j_farg1->as_VMReg()->value()] = false; |
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2148 live[j_farg2->as_VMReg()->value()] = false; |
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2149 live[j_farg3->as_VMReg()->value()] = false; |
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2150 live[j_farg4->as_VMReg()->value()] = false; |
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2151 live[j_farg5->as_VMReg()->value()] = false; |
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2152 live[j_farg6->as_VMReg()->value()] = false; |
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2153 live[j_farg7->as_VMReg()->value()] = false; |
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2154 |
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2155 |
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2156 bool rax_is_zero = false; |
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2157 |
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2158 // All args (except strings) destined for the stack are moved first |
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2159 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2160 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2161 VMRegPair src = in_regs[j_arg]; |
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2162 VMRegPair dst = out_regs[c_arg]; |
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2163 |
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2164 // Get the real reg value or a dummy (rsp) |
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2165 |
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2166 int src_reg = src.first()->is_reg() ? |
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2167 src.first()->value() : |
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2168 rsp->as_VMReg()->value(); |
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2169 |
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2170 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
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2171 (in_sig_bt[j_arg] == T_OBJECT && |
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2172 out_sig_bt[c_arg] != T_INT && |
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2173 out_sig_bt[c_arg] != T_ADDRESS && |
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2174 out_sig_bt[c_arg] != T_LONG); |
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2175 |
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2176 live[src_reg] = !useless; |
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2177 |
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2178 if (dst.first()->is_stack()) { |
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2179 |
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2180 // Even though a string arg in a register is still live after this loop |
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2181 // after the string conversion loop (next) it will be dead so we take |
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2182 // advantage of that now for simpler code to manage live. |
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2183 |
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2184 live[src_reg] = false; |
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2185 switch (in_sig_bt[j_arg]) { |
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2186 |
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2187 case T_ARRAY: |
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2188 case T_OBJECT: |
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2189 { |
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2190 Address stack_dst(rsp, reg2offset_out(dst.first())); |
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2191 |
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2192 if (out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
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2193 // need to unbox a one-word value |
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2194 Register in_reg = rax; |
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2195 if ( src.first()->is_reg() ) { |
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2196 in_reg = src.first()->as_Register(); |
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2197 } else { |
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2198 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); |
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2199 rax_is_zero = false; |
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2200 } |
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2201 Label skipUnbox; |
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2202 __ movptr(Address(rsp, reg2offset_out(dst.first())), |
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2203 (int32_t)NULL_WORD); |
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2204 __ testq(in_reg, in_reg); |
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2205 __ jcc(Assembler::zero, skipUnbox); |
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2206 |
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2207 BasicType bt = out_sig_bt[c_arg]; |
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2208 int box_offset = java_lang_boxing_object::value_offset_in_bytes(bt); |
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2209 Address src1(in_reg, box_offset); |
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2210 if ( bt == T_LONG ) { |
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2211 __ movq(in_reg, src1); |
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2212 __ movq(stack_dst, in_reg); |
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2213 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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2214 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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2215 } else { |
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2216 __ movl(in_reg, src1); |
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2217 __ movl(stack_dst, in_reg); |
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2218 } |
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2219 |
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2220 __ bind(skipUnbox); |
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2221 } else if (out_sig_bt[c_arg] != T_ADDRESS) { |
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2222 // Convert the arg to NULL |
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2223 if (!rax_is_zero) { |
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2224 __ xorq(rax, rax); |
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2225 rax_is_zero = true; |
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2226 } |
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2227 __ movq(stack_dst, rax); |
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|
2228 } |
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|
2229 } |
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|
2230 break; |
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|
2231 |
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|
2232 case T_VOID: |
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2233 break; |
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|
2234 |
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2235 case T_FLOAT: |
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2236 // This does the right thing since we know it is destined for the |
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2237 // stack |
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2238 float_move(masm, src, dst); |
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2239 break; |
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|
2240 |
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2241 case T_DOUBLE: |
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2242 // This does the right thing since we know it is destined for the |
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2243 // stack |
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2244 double_move(masm, src, dst); |
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2245 break; |
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|
2246 |
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2247 case T_LONG : |
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2248 long_move(masm, src, dst); |
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2249 break; |
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|
2250 |
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2251 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); |
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2252 |
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2253 default: |
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2254 move32_64(masm, src, dst); |
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2255 } |
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|
2256 } |
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|
2257 |
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|
2258 } |
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|
2259 |
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2260 // If we have any strings we must store any register based arg to the stack |
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2261 // This includes any still live xmm registers too. |
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|
2262 |
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|
2263 int sid = 0; |
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|
2264 |
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2265 if (total_strings > 0 ) { |
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2266 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2267 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2268 VMRegPair src = in_regs[j_arg]; |
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2269 VMRegPair dst = out_regs[c_arg]; |
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|
2270 |
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2271 if (src.first()->is_reg()) { |
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2272 Address src_tmp(rbp, fp_offset[src.first()->value()]); |
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|
2273 |
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2274 // string oops were left untouched by the previous loop even if the |
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2275 // eventual (converted) arg is destined for the stack so park them |
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2276 // away now (except for first) |
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|
2277 |
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2278 if (out_sig_bt[c_arg] == T_ADDRESS) { |
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2279 Address utf8_addr = Address( |
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2280 rsp, string_locs[sid++] * VMRegImpl::stack_slot_size); |
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2281 if (sid != 1) { |
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2282 // The first string arg won't be killed until after the utf8 |
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|
2283 // conversion |
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|
2284 __ movq(utf8_addr, src.first()->as_Register()); |
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|
2285 } |
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|
2286 } else if (dst.first()->is_reg()) { |
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2287 if (in_sig_bt[j_arg] == T_FLOAT || in_sig_bt[j_arg] == T_DOUBLE) { |
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|
2288 |
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|
2289 // Convert the xmm register to an int and store it in the reserved |
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2290 // location for the eventual c register arg |
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2291 XMMRegister f = src.first()->as_XMMRegister(); |
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2292 if (in_sig_bt[j_arg] == T_FLOAT) { |
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2293 __ movflt(src_tmp, f); |
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|
2294 } else { |
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|
2295 __ movdbl(src_tmp, f); |
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|
2296 } |
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|
2297 } else { |
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|
2298 // If the arg is an oop type we don't support don't bother to store |
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2299 // it remember string was handled above. |
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2300 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
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2301 (in_sig_bt[j_arg] == T_OBJECT && |
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2302 out_sig_bt[c_arg] != T_INT && |
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|
2303 out_sig_bt[c_arg] != T_LONG); |
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|
2304 |
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|
2305 if (!useless) { |
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2306 __ movq(src_tmp, src.first()->as_Register()); |
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|
2307 } |
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|
2308 } |
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|
2309 } |
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|
2310 } |
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|
2311 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
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2312 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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2313 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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|
2314 } |
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|
2315 } |
018d5b58dd4f
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|
2316 |
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2317 // Now that the volatile registers are safe, convert all the strings |
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|
2318 sid = 0; |
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|
2319 |
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2320 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2321 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2322 if (out_sig_bt[c_arg] == T_ADDRESS) { |
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|
2323 // It's a string |
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|
2324 Address utf8_addr = Address( |
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2325 rsp, string_locs[sid++] * VMRegImpl::stack_slot_size); |
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2326 // The first string we find might still be in the original java arg |
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|
2327 // register |
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|
2328 |
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2329 VMReg src = in_regs[j_arg].first(); |
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|
2330 |
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2331 // We will need to eventually save the final argument to the trap |
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2332 // in the von-volatile location dedicated to src. This is the offset |
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2333 // from fp we will use. |
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2334 int src_off = src->is_reg() ? |
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2335 fp_offset[src->value()] : reg2offset_in(src); |
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|
2336 |
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|
2337 // This is where the argument will eventually reside |
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2338 VMRegPair dst = out_regs[c_arg]; |
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|
2339 |
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2340 if (src->is_reg()) { |
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2341 if (sid == 1) { |
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2342 __ movq(c_rarg0, src->as_Register()); |
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|
2343 } else { |
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2344 __ movq(c_rarg0, utf8_addr); |
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|
2345 } |
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|
2346 } else { |
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|
2347 // arg is still in the original location |
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2348 __ movq(c_rarg0, Address(rbp, reg2offset_in(src))); |
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2349 } |
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2350 Label done, convert; |
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2351 |
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2352 // see if the oop is NULL |
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2353 __ testq(c_rarg0, c_rarg0); |
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2354 __ jcc(Assembler::notEqual, convert); |
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2355 |
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2356 if (dst.first()->is_reg()) { |
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2357 // Save the ptr to utf string in the origina src loc or the tmp |
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2358 // dedicated to it |
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2359 __ movq(Address(rbp, src_off), c_rarg0); |
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2360 } else { |
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2361 __ movq(Address(rsp, reg2offset_out(dst.first())), c_rarg0); |
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2362 } |
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2363 __ jmp(done); |
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2364 |
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2365 __ bind(convert); |
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2366 |
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2367 __ lea(c_rarg1, utf8_addr); |
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2368 if (dst.first()->is_reg()) { |
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2369 __ movq(Address(rbp, src_off), c_rarg1); |
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2370 } else { |
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2371 __ movq(Address(rsp, reg2offset_out(dst.first())), c_rarg1); |
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2372 } |
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2373 // And do the conversion |
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2374 __ call(RuntimeAddress( |
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2375 CAST_FROM_FN_PTR(address, SharedRuntime::get_utf))); |
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2376 |
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2377 __ bind(done); |
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2378 } |
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2379 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
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2380 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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2381 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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2382 } |
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2383 } |
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2384 // The get_utf call killed all the c_arg registers |
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2385 live[c_rarg0->as_VMReg()->value()] = false; |
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2386 live[c_rarg1->as_VMReg()->value()] = false; |
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2387 live[c_rarg2->as_VMReg()->value()] = false; |
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2388 live[c_rarg3->as_VMReg()->value()] = false; |
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2389 live[c_rarg4->as_VMReg()->value()] = false; |
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2390 live[c_rarg5->as_VMReg()->value()] = false; |
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2391 |
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2392 live[c_farg0->as_VMReg()->value()] = false; |
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2393 live[c_farg1->as_VMReg()->value()] = false; |
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2394 live[c_farg2->as_VMReg()->value()] = false; |
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2395 live[c_farg3->as_VMReg()->value()] = false; |
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2396 live[c_farg4->as_VMReg()->value()] = false; |
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2397 live[c_farg5->as_VMReg()->value()] = false; |
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2398 live[c_farg6->as_VMReg()->value()] = false; |
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2399 live[c_farg7->as_VMReg()->value()] = false; |
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2400 } |
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2401 |
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2402 // Now we can finally move the register args to their desired locations |
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2403 |
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2404 rax_is_zero = false; |
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2405 |
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2406 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2407 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2408 |
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2409 VMRegPair src = in_regs[j_arg]; |
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2410 VMRegPair dst = out_regs[c_arg]; |
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2411 |
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2412 // Only need to look for args destined for the interger registers (since we |
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2413 // convert float/double args to look like int/long outbound) |
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2414 if (dst.first()->is_reg()) { |
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2415 Register r = dst.first()->as_Register(); |
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2416 |
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2417 // Check if the java arg is unsupported and thereofre useless |
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2418 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
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2419 (in_sig_bt[j_arg] == T_OBJECT && |
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2420 out_sig_bt[c_arg] != T_INT && |
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2421 out_sig_bt[c_arg] != T_ADDRESS && |
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2422 out_sig_bt[c_arg] != T_LONG); |
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2423 |
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2424 |
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2425 // If we're going to kill an existing arg save it first |
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2426 if (live[dst.first()->value()]) { |
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2427 // you can't kill yourself |
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2428 if (src.first() != dst.first()) { |
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2429 __ movq(Address(rbp, fp_offset[dst.first()->value()]), r); |
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2430 } |
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|
2431 } |
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2432 if (src.first()->is_reg()) { |
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2433 if (live[src.first()->value()] ) { |
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2434 if (in_sig_bt[j_arg] == T_FLOAT) { |
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2435 __ movdl(r, src.first()->as_XMMRegister()); |
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2436 } else if (in_sig_bt[j_arg] == T_DOUBLE) { |
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2437 __ movdq(r, src.first()->as_XMMRegister()); |
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2438 } else if (r != src.first()->as_Register()) { |
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2439 if (!useless) { |
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2440 __ movq(r, src.first()->as_Register()); |
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2441 } |
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|
2442 } |
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|
2443 } else { |
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2444 // If the arg is an oop type we don't support don't bother to store |
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2445 // it |
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2446 if (!useless) { |
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2447 if (in_sig_bt[j_arg] == T_DOUBLE || |
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2448 in_sig_bt[j_arg] == T_LONG || |
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2449 in_sig_bt[j_arg] == T_OBJECT ) { |
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2450 __ movq(r, Address(rbp, fp_offset[src.first()->value()])); |
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2451 } else { |
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2452 __ movl(r, Address(rbp, fp_offset[src.first()->value()])); |
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2453 } |
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|
2454 } |
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|
2455 } |
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|
2456 live[src.first()->value()] = false; |
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2457 } else if (!useless) { |
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2458 // full sized move even for int should be ok |
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2459 __ movq(r, Address(rbp, reg2offset_in(src.first()))); |
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2460 } |
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|
2461 |
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2462 // At this point r has the original java arg in the final location |
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2463 // (assuming it wasn't useless). If the java arg was an oop |
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2464 // we have a bit more to do |
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2465 |
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2466 if (in_sig_bt[j_arg] == T_ARRAY || in_sig_bt[j_arg] == T_OBJECT ) { |
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2467 if (out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
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2468 // need to unbox a one-word value |
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2469 Label skip; |
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2470 __ testq(r, r); |
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2471 __ jcc(Assembler::equal, skip); |
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2472 BasicType bt = out_sig_bt[c_arg]; |
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2473 int box_offset = java_lang_boxing_object::value_offset_in_bytes(bt); |
116
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2474 Address src1(r, box_offset); |
165
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2475 if ( bt == T_LONG ) { |
116
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2476 __ movq(r, src1); |
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2477 } else { |
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2478 __ movl(r, src1); |
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2479 } |
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2480 __ bind(skip); |
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2481 |
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2482 } else if (out_sig_bt[c_arg] != T_ADDRESS) { |
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2483 // Convert the arg to NULL |
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2484 __ xorq(r, r); |
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2485 } |
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2486 } |
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2487 |
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2488 // dst can longer be holding an input value |
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2489 live[dst.first()->value()] = false; |
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2490 } |
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2491 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
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2492 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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2493 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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2494 } |
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2495 } |
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2496 |
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2497 |
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2498 // Ok now we are done. Need to place the nop that dtrace wants in order to |
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2499 // patch in the trap |
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2500 int patch_offset = ((intptr_t)__ pc()) - start; |
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2501 |
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2502 __ nop(); |
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2503 |
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2504 |
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2505 // Return |
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2506 |
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2507 __ leave(); |
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2508 __ ret(0); |
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2509 |
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2510 __ flush(); |
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2511 |
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2512 nmethod *nm = nmethod::new_dtrace_nmethod( |
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2513 method, masm->code(), vep_offset, patch_offset, frame_complete, |
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2514 stack_slots / VMRegImpl::slots_per_word); |
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2515 return nm; |
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2516 |
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2517 } |
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2518 |
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2519 #endif // HAVE_DTRACE_H |
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2520 |
0 | 2521 // this function returns the adjust size (in number of words) to a c2i adapter |
2522 // activation for use during deoptimization | |
2523 int Deoptimization::last_frame_adjust(int callee_parameters, int callee_locals ) { | |
1506 | 2524 return (callee_locals - callee_parameters) * Interpreter::stackElementWords; |
0 | 2525 } |
2526 | |
2527 | |
2528 uint SharedRuntime::out_preserve_stack_slots() { | |
2529 return 0; | |
2530 } | |
2531 | |
2532 | |
2533 //------------------------------generate_deopt_blob---------------------------- | |
2534 void SharedRuntime::generate_deopt_blob() { | |
2535 // Allocate space for the code | |
2536 ResourceMark rm; | |
2537 // Setup code generation tools | |
2538 CodeBuffer buffer("deopt_blob", 2048, 1024); | |
2539 MacroAssembler* masm = new MacroAssembler(&buffer); | |
2540 int frame_size_in_words; | |
2541 OopMap* map = NULL; | |
2542 OopMapSet *oop_maps = new OopMapSet(); | |
2543 | |
2544 // ------------- | |
2545 // This code enters when returning to a de-optimized nmethod. A return | |
2546 // address has been pushed on the the stack, and return values are in | |
2547 // registers. | |
2548 // If we are doing a normal deopt then we were called from the patched | |
2549 // nmethod from the point we returned to the nmethod. So the return | |
2550 // address on the stack is wrong by NativeCall::instruction_size | |
2551 // We will adjust the value so it looks like we have the original return | |
2552 // address on the stack (like when we eagerly deoptimized). | |
2553 // In the case of an exception pending when deoptimizing, we enter | |
2554 // with a return address on the stack that points after the call we patched | |
2555 // into the exception handler. We have the following register state from, | |
2556 // e.g., the forward exception stub (see stubGenerator_x86_64.cpp). | |
2557 // rax: exception oop | |
2558 // rbx: exception handler | |
2559 // rdx: throwing pc | |
2560 // So in this case we simply jam rdx into the useless return address and | |
2561 // the stack looks just like we want. | |
2562 // | |
2563 // At this point we need to de-opt. We save the argument return | |
2564 // registers. We call the first C routine, fetch_unroll_info(). This | |
2565 // routine captures the return values and returns a structure which | |
2566 // describes the current frame size and the sizes of all replacement frames. | |
2567 // The current frame is compiled code and may contain many inlined | |
2568 // functions, each with their own JVM state. We pop the current frame, then | |
2569 // push all the new frames. Then we call the C routine unpack_frames() to | |
2570 // populate these frames. Finally unpack_frames() returns us the new target | |
2571 // address. Notice that callee-save registers are BLOWN here; they have | |
2572 // already been captured in the vframeArray at the time the return PC was | |
2573 // patched. | |
2574 address start = __ pc(); | |
2575 Label cont; | |
2576 | |
2577 // Prolog for non exception case! | |
2578 | |
2579 // Save everything in sight. | |
2580 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
2581 | |
2582 // Normal deoptimization. Save exec mode for unpack_frames. | |
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2583 __ movl(r14, Deoptimization::Unpack_deopt); // callee-saved |
0 | 2584 __ jmp(cont); |
304 | 2585 |
2586 int reexecute_offset = __ pc() - start; | |
2587 | |
2588 // Reexecute case | |
2589 // return address is the pc describes what bci to do re-execute at | |
2590 | |
2591 // No need to update map as each call to save_live_registers will produce identical oopmap | |
2592 (void) RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
2593 | |
2594 __ movl(r14, Deoptimization::Unpack_reexecute); // callee-saved | |
2595 __ jmp(cont); | |
2596 | |
0 | 2597 int exception_offset = __ pc() - start; |
2598 | |
2599 // Prolog for exception case | |
2600 | |
304 | 2601 // all registers are dead at this entry point, except for rax, and |
2602 // rdx which contain the exception oop and exception pc | |
2603 // respectively. Set them in TLS and fall thru to the | |
2604 // unpack_with_exception_in_tls entry point. | |
2605 | |
2606 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), rdx); | |
2607 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), rax); | |
2608 | |
2609 int exception_in_tls_offset = __ pc() - start; | |
2610 | |
2611 // new implementation because exception oop is now passed in JavaThread | |
2612 | |
2613 // Prolog for exception case | |
2614 // All registers must be preserved because they might be used by LinearScan | |
2615 // Exceptiop oop and throwing PC are passed in JavaThread | |
2616 // tos: stack at point of call to method that threw the exception (i.e. only | |
2617 // args are on the stack, no return address) | |
2618 | |
2619 // make room on stack for the return address | |
2620 // It will be patched later with the throwing pc. The correct value is not | |
2621 // available now because loading it from memory would destroy registers. | |
2622 __ push(0); | |
0 | 2623 |
2624 // Save everything in sight. | |
2625 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
2626 | |
304 | 2627 // Now it is safe to overwrite any register |
2628 | |
0 | 2629 // Deopt during an exception. Save exec mode for unpack_frames. |
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2630 __ movl(r14, Deoptimization::Unpack_exception); // callee-saved |
0 | 2631 |
304 | 2632 // load throwing pc from JavaThread and patch it as the return address |
2633 // of the current frame. Then clear the field in JavaThread | |
2634 | |
2635 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); | |
2636 __ movptr(Address(rbp, wordSize), rdx); | |
2637 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD); | |
2638 | |
2639 #ifdef ASSERT | |
2640 // verify that there is really an exception oop in JavaThread | |
2641 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); | |
2642 __ verify_oop(rax); | |
2643 | |
2644 // verify that there is no pending exception | |
2645 Label no_pending_exception; | |
2646 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset())); | |
2647 __ testptr(rax, rax); | |
2648 __ jcc(Assembler::zero, no_pending_exception); | |
2649 __ stop("must not have pending exception here"); | |
2650 __ bind(no_pending_exception); | |
2651 #endif | |
2652 | |
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Rebranded C++ part from C1X to Graal.
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2653 // (tw) Start of graal uncommon trap code. |
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2654 __ jmp(cont); |
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2655 |
2605
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|
2656 int jmp_uncommon_trap_offset = __ pc() - start; |
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2657 __ pushptr(Address(r15_thread, in_bytes(JavaThread::ScratchA_offset()))); |
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|
2658 |
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2659 int uncommon_trap_offset = __ pc() - start; |
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2660 |
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2661 // Warning: Duplicate code |
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2662 |
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2663 // Save everything in sight. |
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2664 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); |
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2665 |
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|
2666 // Normal deoptimization |
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2667 |
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2668 |
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|
2669 // fetch_unroll_info needs to call last_java_frame() |
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2670 __ set_last_Java_frame(noreg, noreg, NULL); |
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2671 |
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|
2672 // __ movl(c_rarg1, (int32_t)Deoptimization::Unpack_reexecute); |
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|
2673 // __ movl(r14, c_rarg1); // save into r14 for later call to unpack_frames |
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|
2674 __ movl(c_rarg1, (int32_t)-1); |
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|
2675 __ movl(r14, (int32_t)Deoptimization::Unpack_reexecute); |
2059
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|
2676 __ mov(c_rarg0, r15_thread); |
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|
2677 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap))); |
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|
2678 |
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|
2679 // Need to have an oopmap that tells fetch_unroll_info where to |
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diff
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|
2680 // find any register it might need. |
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diff
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|
2681 |
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Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1972
diff
changeset
|
2682 oop_maps->add_gc_map( __ pc()-start, map->deep_copy()); |
9508a52cbd32
Add deoptimization blob support.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1972
diff
changeset
|
2683 |
9508a52cbd32
Add deoptimization blob support.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1972
diff
changeset
|
2684 __ reset_last_Java_frame(false, false); |
9508a52cbd32
Add deoptimization blob support.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1972
diff
changeset
|
2685 |
9508a52cbd32
Add deoptimization blob support.
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parents:
1972
diff
changeset
|
2686 Label after_fetch_unroll_info_call; |
9508a52cbd32
Add deoptimization blob support.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1972
diff
changeset
|
2687 __ jmp(after_fetch_unroll_info_call); |
9508a52cbd32
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parents:
1972
diff
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|
2688 |
9508a52cbd32
Add deoptimization blob support.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1972
diff
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|
2689 |
2891
75a99b4f1c98
Rebranded C++ part from C1X to Graal.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2605
diff
changeset
|
2690 // (tw) End of graal uncommon trap code. |
2059
9508a52cbd32
Add deoptimization blob support.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1972
diff
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|
2691 |
0 | 2692 __ bind(cont); |
2693 | |
2694 // Call C code. Need thread and this frame, but NOT official VM entry | |
2695 // crud. We cannot block on this call, no GC can happen. | |
2696 // | |
2697 // UnrollBlock* fetch_unroll_info(JavaThread* thread) | |
2698 | |
2699 // fetch_unroll_info needs to call last_java_frame(). | |
2700 | |
2701 __ set_last_Java_frame(noreg, noreg, NULL); | |
2702 #ifdef ASSERT | |
2703 { Label L; | |
304 | 2704 __ cmpptr(Address(r15_thread, |
0 | 2705 JavaThread::last_Java_fp_offset()), |
304 | 2706 (int32_t)0); |
0 | 2707 __ jcc(Assembler::equal, L); |
2708 __ stop("SharedRuntime::generate_deopt_blob: last_Java_fp not cleared"); | |
2709 __ bind(L); | |
2710 } | |
2711 #endif // ASSERT | |
304 | 2712 __ mov(c_rarg0, r15_thread); |
0 | 2713 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::fetch_unroll_info))); |
2714 | |
2715 // Need to have an oopmap that tells fetch_unroll_info where to | |
2716 // find any register it might need. | |
2717 oop_maps->add_gc_map(__ pc() - start, map); | |
2718 | |
2719 __ reset_last_Java_frame(false, false); | |
2720 | |
2059
9508a52cbd32
Add deoptimization blob support.
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parents:
1972
diff
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|
2721 __ bind(after_fetch_unroll_info_call); |
9508a52cbd32
Add deoptimization blob support.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1972
diff
changeset
|
2722 |
0 | 2723 // Load UnrollBlock* into rdi |
304 | 2724 __ mov(rdi, rax); |
2725 | |
2726 Label noException; | |
682
69aefafe69c1
6824463: deopt blob is testing wrong register on 64-bit x86
never
parents:
628
diff
changeset
|
2727 __ cmpl(r14, Deoptimization::Unpack_exception); // Was exception pending? |
304 | 2728 __ jcc(Assembler::notEqual, noException); |
2729 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); | |
2730 // QQQ this is useless it was NULL above | |
2731 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); | |
2732 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD); | |
2733 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD); | |
2734 | |
2735 __ verify_oop(rax); | |
2736 | |
2737 // Overwrite the result registers with the exception results. | |
2738 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); | |
2739 // I think this is useless | |
2740 __ movptr(Address(rsp, RegisterSaver::rdx_offset_in_bytes()), rdx); | |
2741 | |
2742 __ bind(noException); | |
0 | 2743 |
2744 // Only register save data is on the stack. | |
2745 // Now restore the result registers. Everything else is either dead | |
2746 // or captured in the vframeArray. | |
2747 RegisterSaver::restore_result_registers(masm); | |
2748 | |
2749 // All of the register save area has been popped of the stack. Only the | |
2750 // return address remains. | |
2751 | |
2752 // Pop all the frames we must move/replace. | |
2753 // | |
2754 // Frame picture (youngest to oldest) | |
2755 // 1: self-frame (no frame link) | |
2756 // 2: deopting frame (no frame link) | |
2757 // 3: caller of deopting frame (could be compiled/interpreted). | |
2758 // | |
2759 // Note: by leaving the return address of self-frame on the stack | |
2760 // and using the size of frame 2 to adjust the stack | |
2761 // when we are done the return to frame 3 will still be on the stack. | |
2762 | |
2763 // Pop deoptimized frame | |
2764 __ movl(rcx, Address(rdi, Deoptimization::UnrollBlock::size_of_deoptimized_frame_offset_in_bytes())); | |
304 | 2765 __ addptr(rsp, rcx); |
0 | 2766 |
2767 // rsp should be pointing at the return address to the caller (3) | |
2768 | |
2769 // Stack bang to make sure there's enough room for these interpreter frames. | |
2770 if (UseStackBanging) { | |
2771 __ movl(rbx, Address(rdi, Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); | |
2772 __ bang_stack_size(rbx, rcx); | |
2773 } | |
2774 | |
2775 // Load address of array of frame pcs into rcx | |
304 | 2776 __ movptr(rcx, Address(rdi, Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); |
0 | 2777 |
2778 // Trash the old pc | |
304 | 2779 __ addptr(rsp, wordSize); |
0 | 2780 |
2781 // Load address of array of frame sizes into rsi | |
304 | 2782 __ movptr(rsi, Address(rdi, Deoptimization::UnrollBlock::frame_sizes_offset_in_bytes())); |
0 | 2783 |
2784 // Load counter into rdx | |
2785 __ movl(rdx, Address(rdi, Deoptimization::UnrollBlock::number_of_frames_offset_in_bytes())); | |
2786 | |
2787 // Pick up the initial fp we should save | |
304 | 2788 __ movptr(rbp, Address(rdi, Deoptimization::UnrollBlock::initial_fp_offset_in_bytes())); |
0 | 2789 |
2790 // Now adjust the caller's stack to make up for the extra locals | |
2791 // but record the original sp so that we can save it in the skeletal interpreter | |
2792 // frame and the stack walking of interpreter_sender will get the unextended sp | |
2793 // value and not the "real" sp value. | |
2794 | |
2795 const Register sender_sp = r8; | |
2796 | |
304 | 2797 __ mov(sender_sp, rsp); |
0 | 2798 __ movl(rbx, Address(rdi, |
2799 Deoptimization::UnrollBlock:: | |
2800 caller_adjustment_offset_in_bytes())); | |
304 | 2801 __ subptr(rsp, rbx); |
0 | 2802 |
2803 // Push interpreter frames in a loop | |
2804 Label loop; | |
2805 __ bind(loop); | |
304 | 2806 __ movptr(rbx, Address(rsi, 0)); // Load frame size |
2807 #ifdef CC_INTERP | |
2808 __ subptr(rbx, 4*wordSize); // we'll push pc and ebp by hand and | |
2809 #ifdef ASSERT | |
2810 __ push(0xDEADDEAD); // Make a recognizable pattern | |
2811 __ push(0xDEADDEAD); | |
2812 #else /* ASSERT */ | |
2813 __ subptr(rsp, 2*wordSize); // skip the "static long no_param" | |
2814 #endif /* ASSERT */ | |
2815 #else | |
2816 __ subptr(rbx, 2*wordSize); // We'll push pc and ebp by hand | |
2817 #endif // CC_INTERP | |
2818 __ pushptr(Address(rcx, 0)); // Save return address | |
0 | 2819 __ enter(); // Save old & set new ebp |
304 | 2820 __ subptr(rsp, rbx); // Prolog |
2821 #ifdef CC_INTERP | |
2822 __ movptr(Address(rbp, | |
2823 -(sizeof(BytecodeInterpreter)) + in_bytes(byte_offset_of(BytecodeInterpreter, _sender_sp))), | |
2824 sender_sp); // Make it walkable | |
2825 #else /* CC_INTERP */ | |
0 | 2826 // This value is corrected by layout_activation_impl |
304 | 2827 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD ); |
2828 __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), sender_sp); // Make it walkable | |
2829 #endif /* CC_INTERP */ | |
2830 __ mov(sender_sp, rsp); // Pass sender_sp to next frame | |
2831 __ addptr(rsi, wordSize); // Bump array pointer (sizes) | |
2832 __ addptr(rcx, wordSize); // Bump array pointer (pcs) | |
0 | 2833 __ decrementl(rdx); // Decrement counter |
2834 __ jcc(Assembler::notZero, loop); | |
304 | 2835 __ pushptr(Address(rcx, 0)); // Save final return address |
0 | 2836 |
2837 // Re-push self-frame | |
2838 __ enter(); // Save old & set new ebp | |
2839 | |
2840 // Allocate a full sized register save area. | |
2841 // Return address and rbp are in place, so we allocate two less words. | |
304 | 2842 __ subptr(rsp, (frame_size_in_words - 2) * wordSize); |
0 | 2843 |
2844 // Restore frame locals after moving the frame | |
2845 __ movdbl(Address(rsp, RegisterSaver::xmm0_offset_in_bytes()), xmm0); | |
304 | 2846 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); |
0 | 2847 |
2848 // Call C code. Need thread but NOT official VM entry | |
2849 // crud. We cannot block on this call, no GC can happen. Call should | |
2850 // restore return values to their stack-slots with the new SP. | |
2851 // | |
2852 // void Deoptimization::unpack_frames(JavaThread* thread, int exec_mode) | |
2853 | |
2854 // Use rbp because the frames look interpreted now | |
2855 __ set_last_Java_frame(noreg, rbp, NULL); | |
2856 | |
304 | 2857 __ mov(c_rarg0, r15_thread); |
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0
diff
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|
2858 __ movl(c_rarg1, r14); // second arg: exec_mode |
0 | 2859 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); |
2860 | |
2861 // Set an oopmap for the call site | |
2862 oop_maps->add_gc_map(__ pc() - start, | |
2863 new OopMap( frame_size_in_words, 0 )); | |
2864 | |
2865 __ reset_last_Java_frame(true, false); | |
2866 | |
2867 // Collect return values | |
2868 __ movdbl(xmm0, Address(rsp, RegisterSaver::xmm0_offset_in_bytes())); | |
304 | 2869 __ movptr(rax, Address(rsp, RegisterSaver::rax_offset_in_bytes())); |
2870 // I think this is useless (throwing pc?) | |
2871 __ movptr(rdx, Address(rsp, RegisterSaver::rdx_offset_in_bytes())); | |
0 | 2872 |
2873 // Pop self-frame. | |
2874 __ leave(); // Epilog | |
2875 | |
2876 // Jump to interpreter | |
2877 __ ret(0); | |
2878 | |
2879 // Make sure all code is generated | |
2880 masm->flush(); | |
2881 | |
304 | 2882 _deopt_blob = DeoptimizationBlob::create(&buffer, oop_maps, 0, exception_offset, reexecute_offset, frame_size_in_words); |
2883 _deopt_blob->set_unpack_with_exception_in_tls_offset(exception_in_tls_offset); | |
2059
9508a52cbd32
Add deoptimization blob support.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1972
diff
changeset
|
2884 _deopt_blob->set_uncommon_trap_offset(uncommon_trap_offset); |
2605
98fa88528319
Deopt on implicit null pointer exception.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2491
diff
changeset
|
2885 _deopt_blob->set_jmp_uncommon_trap_offset(jmp_uncommon_trap_offset); |
0 | 2886 } |
2887 | |
2888 #ifdef COMPILER2 | |
2889 //------------------------------generate_uncommon_trap_blob-------------------- | |
2890 void SharedRuntime::generate_uncommon_trap_blob() { | |
2891 // Allocate space for the code | |
2892 ResourceMark rm; | |
2893 // Setup code generation tools | |
2894 CodeBuffer buffer("uncommon_trap_blob", 2048, 1024); | |
2895 MacroAssembler* masm = new MacroAssembler(&buffer); | |
2896 | |
2897 assert(SimpleRuntimeFrame::framesize % 4 == 0, "sp not 16-byte aligned"); | |
2898 | |
2899 address start = __ pc(); | |
2900 | |
2901 // Push self-frame. We get here with a return address on the | |
2902 // stack, so rsp is 8-byte aligned until we allocate our frame. | |
304 | 2903 __ subptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Epilog! |
0 | 2904 |
2905 // No callee saved registers. rbp is assumed implicitly saved | |
304 | 2906 __ movptr(Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt), rbp); |
0 | 2907 |
2908 // compiler left unloaded_class_index in j_rarg0 move to where the | |
2909 // runtime expects it. | |
2910 __ movl(c_rarg1, j_rarg0); | |
2911 | |
2912 __ set_last_Java_frame(noreg, noreg, NULL); | |
2913 | |
2914 // Call C code. Need thread but NOT official VM entry | |
2915 // crud. We cannot block on this call, no GC can happen. Call should | |
2916 // capture callee-saved registers as well as return values. | |
2917 // Thread is in rdi already. | |
2918 // | |
2919 // UnrollBlock* uncommon_trap(JavaThread* thread, jint unloaded_class_index); | |
2920 | |
304 | 2921 __ mov(c_rarg0, r15_thread); |
0 | 2922 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap))); |
2923 | |
2924 // Set an oopmap for the call site | |
2925 OopMapSet* oop_maps = new OopMapSet(); | |
2926 OopMap* map = new OopMap(SimpleRuntimeFrame::framesize, 0); | |
2927 | |
2928 // location of rbp is known implicitly by the frame sender code | |
2929 | |
2930 oop_maps->add_gc_map(__ pc() - start, map); | |
2931 | |
2932 __ reset_last_Java_frame(false, false); | |
2933 | |
2934 // Load UnrollBlock* into rdi | |
304 | 2935 __ mov(rdi, rax); |
0 | 2936 |
2937 // Pop all the frames we must move/replace. | |
2938 // | |
2939 // Frame picture (youngest to oldest) | |
2940 // 1: self-frame (no frame link) | |
2941 // 2: deopting frame (no frame link) | |
2942 // 3: caller of deopting frame (could be compiled/interpreted). | |
2943 | |
2944 // Pop self-frame. We have no frame, and must rely only on rax and rsp. | |
304 | 2945 __ addptr(rsp, (SimpleRuntimeFrame::framesize - 2) << LogBytesPerInt); // Epilog! |
0 | 2946 |
2947 // Pop deoptimized frame (int) | |
2948 __ movl(rcx, Address(rdi, | |
2949 Deoptimization::UnrollBlock:: | |
2950 size_of_deoptimized_frame_offset_in_bytes())); | |
304 | 2951 __ addptr(rsp, rcx); |
0 | 2952 |
2953 // rsp should be pointing at the return address to the caller (3) | |
2954 | |
2955 // Stack bang to make sure there's enough room for these interpreter frames. | |
2956 if (UseStackBanging) { | |
2957 __ movl(rbx, Address(rdi ,Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); | |
2958 __ bang_stack_size(rbx, rcx); | |
2959 } | |
2960 | |
2961 // Load address of array of frame pcs into rcx (address*) | |
304 | 2962 __ movptr(rcx, |
2963 Address(rdi, | |
2964 Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); | |
0 | 2965 |
2966 // Trash the return pc | |
304 | 2967 __ addptr(rsp, wordSize); |
0 | 2968 |
2969 // Load address of array of frame sizes into rsi (intptr_t*) | |
304 | 2970 __ movptr(rsi, Address(rdi, |
2971 Deoptimization::UnrollBlock:: | |
2972 frame_sizes_offset_in_bytes())); | |
0 | 2973 |
2974 // Counter | |
2975 __ movl(rdx, Address(rdi, | |
2976 Deoptimization::UnrollBlock:: | |
2977 number_of_frames_offset_in_bytes())); // (int) | |
2978 | |
2979 // Pick up the initial fp we should save | |
304 | 2980 __ movptr(rbp, |
2981 Address(rdi, | |
2982 Deoptimization::UnrollBlock::initial_fp_offset_in_bytes())); | |
0 | 2983 |
2984 // Now adjust the caller's stack to make up for the extra locals but | |
2985 // record the original sp so that we can save it in the skeletal | |
2986 // interpreter frame and the stack walking of interpreter_sender | |
2987 // will get the unextended sp value and not the "real" sp value. | |
2988 | |
2989 const Register sender_sp = r8; | |
2990 | |
304 | 2991 __ mov(sender_sp, rsp); |
0 | 2992 __ movl(rbx, Address(rdi, |
2993 Deoptimization::UnrollBlock:: | |
2994 caller_adjustment_offset_in_bytes())); // (int) | |
304 | 2995 __ subptr(rsp, rbx); |
0 | 2996 |
2997 // Push interpreter frames in a loop | |
2998 Label loop; | |
2999 __ bind(loop); | |
304 | 3000 __ movptr(rbx, Address(rsi, 0)); // Load frame size |
3001 __ subptr(rbx, 2 * wordSize); // We'll push pc and rbp by hand | |
3002 __ pushptr(Address(rcx, 0)); // Save return address | |
3003 __ enter(); // Save old & set new rbp | |
3004 __ subptr(rsp, rbx); // Prolog | |
520
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3005 #ifdef CC_INTERP |
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|
3006 __ movptr(Address(rbp, |
52a431267315
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304
diff
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|
3007 -(sizeof(BytecodeInterpreter)) + in_bytes(byte_offset_of(BytecodeInterpreter, _sender_sp))), |
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diff
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|
3008 sender_sp); // Make it walkable |
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|
3009 #else // CC_INTERP |
304 | 3010 __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), |
3011 sender_sp); // Make it walkable | |
0 | 3012 // This value is corrected by layout_activation_impl |
304 | 3013 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD ); |
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|
3014 #endif // CC_INTERP |
304 | 3015 __ mov(sender_sp, rsp); // Pass sender_sp to next frame |
3016 __ addptr(rsi, wordSize); // Bump array pointer (sizes) | |
3017 __ addptr(rcx, wordSize); // Bump array pointer (pcs) | |
3018 __ decrementl(rdx); // Decrement counter | |
0 | 3019 __ jcc(Assembler::notZero, loop); |
304 | 3020 __ pushptr(Address(rcx, 0)); // Save final return address |
0 | 3021 |
3022 // Re-push self-frame | |
3023 __ enter(); // Save old & set new rbp | |
304 | 3024 __ subptr(rsp, (SimpleRuntimeFrame::framesize - 4) << LogBytesPerInt); |
0 | 3025 // Prolog |
3026 | |
3027 // Use rbp because the frames look interpreted now | |
3028 __ set_last_Java_frame(noreg, rbp, NULL); | |
3029 | |
3030 // Call C code. Need thread but NOT official VM entry | |
3031 // crud. We cannot block on this call, no GC can happen. Call should | |
3032 // restore return values to their stack-slots with the new SP. | |
3033 // Thread is in rdi already. | |
3034 // | |
3035 // BasicType unpack_frames(JavaThread* thread, int exec_mode); | |
3036 | |
304 | 3037 __ mov(c_rarg0, r15_thread); |
0 | 3038 __ movl(c_rarg1, Deoptimization::Unpack_uncommon_trap); |
3039 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); | |
3040 | |
3041 // Set an oopmap for the call site | |
3042 oop_maps->add_gc_map(__ pc() - start, new OopMap(SimpleRuntimeFrame::framesize, 0)); | |
3043 | |
3044 __ reset_last_Java_frame(true, false); | |
3045 | |
3046 // Pop self-frame. | |
3047 __ leave(); // Epilog | |
3048 | |
3049 // Jump to interpreter | |
3050 __ ret(0); | |
3051 | |
3052 // Make sure all code is generated | |
3053 masm->flush(); | |
3054 | |
3055 _uncommon_trap_blob = UncommonTrapBlob::create(&buffer, oop_maps, | |
3056 SimpleRuntimeFrame::framesize >> 1); | |
3057 } | |
3058 #endif // COMPILER2 | |
3059 | |
3060 | |
3061 //------------------------------generate_handler_blob------ | |
3062 // | |
3063 // Generate a special Compile2Runtime blob that saves all registers, | |
3064 // and setup oopmap. | |
3065 // | |
3066 static SafepointBlob* generate_handler_blob(address call_ptr, bool cause_return) { | |
3067 assert(StubRoutines::forward_exception_entry() != NULL, | |
3068 "must be generated before"); | |
3069 | |
3070 ResourceMark rm; | |
3071 OopMapSet *oop_maps = new OopMapSet(); | |
3072 OopMap* map; | |
3073 | |
3074 // Allocate space for the code. Setup code generation tools. | |
3075 CodeBuffer buffer("handler_blob", 2048, 1024); | |
3076 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3077 | |
3078 address start = __ pc(); | |
3079 address call_pc = NULL; | |
3080 int frame_size_in_words; | |
3081 | |
3082 // Make room for return address (or push it again) | |
3083 if (!cause_return) { | |
304 | 3084 __ push(rbx); |
0 | 3085 } |
3086 | |
3087 // Save registers, fpu state, and flags | |
3088 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
3089 | |
3090 // The following is basically a call_VM. However, we need the precise | |
3091 // address of the call in order to generate an oopmap. Hence, we do all the | |
3092 // work outselves. | |
3093 | |
3094 __ set_last_Java_frame(noreg, noreg, NULL); | |
3095 | |
3096 // The return address must always be correct so that frame constructor never | |
3097 // sees an invalid pc. | |
3098 | |
3099 if (!cause_return) { | |
3100 // overwrite the dummy value we pushed on entry | |
304 | 3101 __ movptr(c_rarg0, Address(r15_thread, JavaThread::saved_exception_pc_offset())); |
3102 __ movptr(Address(rbp, wordSize), c_rarg0); | |
0 | 3103 } |
3104 | |
3105 // Do the call | |
304 | 3106 __ mov(c_rarg0, r15_thread); |
0 | 3107 __ call(RuntimeAddress(call_ptr)); |
3108 | |
3109 // Set an oopmap for the call site. This oopmap will map all | |
3110 // oop-registers and debug-info registers as callee-saved. This | |
3111 // will allow deoptimization at this safepoint to find all possible | |
3112 // debug-info recordings, as well as let GC find all oops. | |
3113 | |
3114 oop_maps->add_gc_map( __ pc() - start, map); | |
3115 | |
3116 Label noException; | |
3117 | |
3118 __ reset_last_Java_frame(false, false); | |
3119 | |
304 | 3120 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 3121 __ jcc(Assembler::equal, noException); |
3122 | |
3123 // Exception pending | |
3124 | |
3125 RegisterSaver::restore_live_registers(masm); | |
3126 | |
3127 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
3128 | |
3129 // No exception case | |
3130 __ bind(noException); | |
3131 | |
3132 // Normal exit, restore registers and exit. | |
3133 RegisterSaver::restore_live_registers(masm); | |
3134 | |
3135 __ ret(0); | |
3136 | |
3137 // Make sure all code is generated | |
3138 masm->flush(); | |
3139 | |
3140 // Fill-out other meta info | |
3141 return SafepointBlob::create(&buffer, oop_maps, frame_size_in_words); | |
3142 } | |
3143 | |
3144 // | |
3145 // generate_resolve_blob - call resolution (static/virtual/opt-virtual/ic-miss | |
3146 // | |
3147 // Generate a stub that calls into vm to find out the proper destination | |
3148 // of a java call. All the argument registers are live at this point | |
3149 // but since this is generic code we don't know what they are and the caller | |
3150 // must do any gc of the args. | |
3151 // | |
3152 static RuntimeStub* generate_resolve_blob(address destination, const char* name) { | |
3153 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); | |
3154 | |
3155 // allocate space for the code | |
3156 ResourceMark rm; | |
3157 | |
3158 CodeBuffer buffer(name, 1000, 512); | |
3159 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3160 | |
3161 int frame_size_in_words; | |
3162 | |
3163 OopMapSet *oop_maps = new OopMapSet(); | |
3164 OopMap* map = NULL; | |
3165 | |
3166 int start = __ offset(); | |
3167 | |
3168 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
3169 | |
3170 int frame_complete = __ offset(); | |
3171 | |
3172 __ set_last_Java_frame(noreg, noreg, NULL); | |
3173 | |
304 | 3174 __ mov(c_rarg0, r15_thread); |
0 | 3175 |
3176 __ call(RuntimeAddress(destination)); | |
3177 | |
3178 | |
3179 // Set an oopmap for the call site. | |
3180 // We need this not only for callee-saved registers, but also for volatile | |
3181 // registers that the compiler might be keeping live across a safepoint. | |
3182 | |
3183 oop_maps->add_gc_map( __ offset() - start, map); | |
3184 | |
3185 // rax contains the address we are going to jump to assuming no exception got installed | |
3186 | |
3187 // clear last_Java_sp | |
3188 __ reset_last_Java_frame(false, false); | |
3189 // check for pending exceptions | |
3190 Label pending; | |
304 | 3191 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 3192 __ jcc(Assembler::notEqual, pending); |
3193 | |
3194 // get the returned methodOop | |
304 | 3195 __ movptr(rbx, Address(r15_thread, JavaThread::vm_result_offset())); |
3196 __ movptr(Address(rsp, RegisterSaver::rbx_offset_in_bytes()), rbx); | |
3197 | |
3198 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); | |
0 | 3199 |
3200 RegisterSaver::restore_live_registers(masm); | |
3201 | |
3202 // We are back the the original state on entry and ready to go. | |
3203 | |
3204 __ jmp(rax); | |
3205 | |
3206 // Pending exception after the safepoint | |
3207 | |
3208 __ bind(pending); | |
3209 | |
3210 RegisterSaver::restore_live_registers(masm); | |
3211 | |
3212 // exception pending => remove activation and forward to exception handler | |
3213 | |
3214 __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), (int)NULL_WORD); | |
3215 | |
304 | 3216 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset())); |
0 | 3217 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
3218 | |
3219 // ------------- | |
3220 // make sure all code is generated | |
3221 masm->flush(); | |
3222 | |
3223 // return the blob | |
3224 // frame_size_words or bytes?? | |
3225 return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_in_words, oop_maps, true); | |
3226 } | |
3227 | |
3228 | |
3229 void SharedRuntime::generate_stubs() { | |
3230 | |
3231 _wrong_method_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method), | |
3232 "wrong_method_stub"); | |
3233 _ic_miss_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_ic_miss), | |
3234 "ic_miss_stub"); | |
3235 _resolve_opt_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_opt_virtual_call_C), | |
3236 "resolve_opt_virtual_call"); | |
3237 | |
3238 _resolve_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_virtual_call_C), | |
3239 "resolve_virtual_call"); | |
3240 | |
3241 _resolve_static_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_static_call_C), | |
3242 "resolve_static_call"); | |
3243 _polling_page_safepoint_handler_blob = | |
3244 generate_handler_blob(CAST_FROM_FN_PTR(address, | |
3245 SafepointSynchronize::handle_polling_page_exception), false); | |
3246 | |
3247 _polling_page_return_handler_blob = | |
3248 generate_handler_blob(CAST_FROM_FN_PTR(address, | |
3249 SafepointSynchronize::handle_polling_page_exception), true); | |
3250 | |
3251 generate_deopt_blob(); | |
3252 | |
3253 #ifdef COMPILER2 | |
3254 generate_uncommon_trap_blob(); | |
3255 #endif // COMPILER2 | |
3256 } | |
3257 | |
3258 | |
3259 #ifdef COMPILER2 | |
3260 // This is here instead of runtime_x86_64.cpp because it uses SimpleRuntimeFrame | |
3261 // | |
3262 //------------------------------generate_exception_blob--------------------------- | |
3263 // creates exception blob at the end | |
3264 // Using exception blob, this code is jumped from a compiled method. | |
3265 // (see emit_exception_handler in x86_64.ad file) | |
3266 // | |
3267 // Given an exception pc at a call we call into the runtime for the | |
3268 // handler in this method. This handler might merely restore state | |
3269 // (i.e. callee save registers) unwind the frame and jump to the | |
3270 // exception handler for the nmethod if there is no Java level handler | |
3271 // for the nmethod. | |
3272 // | |
3273 // This code is entered with a jmp. | |
3274 // | |
3275 // Arguments: | |
3276 // rax: exception oop | |
3277 // rdx: exception pc | |
3278 // | |
3279 // Results: | |
3280 // rax: exception oop | |
3281 // rdx: exception pc in caller or ??? | |
3282 // destination: exception handler of caller | |
3283 // | |
3284 // Note: the exception pc MUST be at a call (precise debug information) | |
3285 // Registers rax, rdx, rcx, rsi, rdi, r8-r11 are not callee saved. | |
3286 // | |
3287 | |
3288 void OptoRuntime::generate_exception_blob() { | |
3289 assert(!OptoRuntime::is_callee_saved_register(RDX_num), ""); | |
3290 assert(!OptoRuntime::is_callee_saved_register(RAX_num), ""); | |
3291 assert(!OptoRuntime::is_callee_saved_register(RCX_num), ""); | |
3292 | |
3293 assert(SimpleRuntimeFrame::framesize % 4 == 0, "sp not 16-byte aligned"); | |
3294 | |
3295 // Allocate space for the code | |
3296 ResourceMark rm; | |
3297 // Setup code generation tools | |
3298 CodeBuffer buffer("exception_blob", 2048, 1024); | |
3299 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3300 | |
3301 | |
3302 address start = __ pc(); | |
3303 | |
3304 // Exception pc is 'return address' for stack walker | |
304 | 3305 __ push(rdx); |
3306 __ subptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Prolog | |
0 | 3307 |
3308 // Save callee-saved registers. See x86_64.ad. | |
3309 | |
3310 // rbp is an implicitly saved callee saved register (i.e. the calling | |
3311 // convention will save restore it in prolog/epilog) Other than that | |
3312 // there are no callee save registers now that adapter frames are gone. | |
3313 | |
304 | 3314 __ movptr(Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt), rbp); |
0 | 3315 |
3316 // Store exception in Thread object. We cannot pass any arguments to the | |
3317 // handle_exception call, since we do not want to make any assumption | |
3318 // about the size of the frame where the exception happened in. | |
3319 // c_rarg0 is either rdi (Linux) or rcx (Windows). | |
304 | 3320 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()),rax); |
3321 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), rdx); | |
0 | 3322 |
3323 // This call does all the hard work. It checks if an exception handler | |
3324 // exists in the method. | |
3325 // If so, it returns the handler address. | |
3326 // If not, it prepares for stack-unwinding, restoring the callee-save | |
3327 // registers of the frame being removed. | |
3328 // | |
3329 // address OptoRuntime::handle_exception_C(JavaThread* thread) | |
3330 | |
3331 __ set_last_Java_frame(noreg, noreg, NULL); | |
304 | 3332 __ mov(c_rarg0, r15_thread); |
0 | 3333 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, OptoRuntime::handle_exception_C))); |
3334 | |
3335 // Set an oopmap for the call site. This oopmap will only be used if we | |
3336 // are unwinding the stack. Hence, all locations will be dead. | |
3337 // Callee-saved registers will be the same as the frame above (i.e., | |
3338 // handle_exception_stub), since they were restored when we got the | |
3339 // exception. | |
3340 | |
3341 OopMapSet* oop_maps = new OopMapSet(); | |
3342 | |
3343 oop_maps->add_gc_map( __ pc()-start, new OopMap(SimpleRuntimeFrame::framesize, 0)); | |
3344 | |
3345 __ reset_last_Java_frame(false, false); | |
3346 | |
3347 // Restore callee-saved registers | |
3348 | |
3349 // rbp is an implicitly saved callee saved register (i.e. the calling | |
3350 // convention will save restore it in prolog/epilog) Other than that | |
3351 // there are no callee save registers no that adapter frames are gone. | |
3352 | |
304 | 3353 __ movptr(rbp, Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt)); |
3354 | |
3355 __ addptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Epilog | |
3356 __ pop(rdx); // No need for exception pc anymore | |
0 | 3357 |
3358 // rax: exception handler | |
3359 | |
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3360 // Restore SP from BP if the exception PC is a MethodHandle call site. |
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3361 __ cmpl(Address(r15_thread, JavaThread::is_method_handle_return_offset()), 0); |
1567 | 3362 __ cmovptr(Assembler::notEqual, rsp, rbp_mh_SP_save); |
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3363 |
0 | 3364 // We have a handler in rax (could be deopt blob). |
304 | 3365 __ mov(r8, rax); |
0 | 3366 |
3367 // Get the exception oop | |
304 | 3368 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); |
0 | 3369 // Get the exception pc in case we are deoptimized |
304 | 3370 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); |
0 | 3371 #ifdef ASSERT |
3372 __ movptr(Address(r15_thread, JavaThread::exception_handler_pc_offset()), (int)NULL_WORD); | |
3373 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int)NULL_WORD); | |
3374 #endif | |
3375 // Clear the exception oop so GC no longer processes it as a root. | |
3376 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), (int)NULL_WORD); | |
3377 | |
3378 // rax: exception oop | |
3379 // r8: exception handler | |
3380 // rdx: exception pc | |
3381 // Jump to handler | |
3382 | |
3383 __ jmp(r8); | |
3384 | |
3385 // Make sure all code is generated | |
3386 masm->flush(); | |
3387 | |
3388 // Set exception blob | |
3389 _exception_blob = ExceptionBlob::create(&buffer, oop_maps, SimpleRuntimeFrame::framesize >> 1); | |
3390 } | |
3391 #endif // COMPILER2 |