Mercurial > hg > graal-compiler
annotate src/cpu/sparc/vm/sharedRuntime_sparc.cpp @ 144:e3729351c946
6697534: Premature GC and invalid lgrp selection with NUMA-aware allocator.
Summary: Don't move tops of the chunks in ensure_parsibility(). Handle the situation with Solaris when a machine has a locality group with no memory.
Reviewed-by: apetrusenko, jcoomes, ysr
author | iveresov |
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date | Fri, 09 May 2008 16:34:08 +0400 |
parents | 018d5b58dd4f |
children | 437d03ea40b1 6b648fefb395 37f87013dfd8 |
rev | line source |
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0 | 1 /* |
2 * Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_sharedRuntime_sparc.cpp.incl" | |
27 | |
28 #define __ masm-> | |
29 | |
30 #ifdef COMPILER2 | |
31 UncommonTrapBlob* SharedRuntime::_uncommon_trap_blob; | |
32 #endif // COMPILER2 | |
33 | |
34 DeoptimizationBlob* SharedRuntime::_deopt_blob; | |
35 SafepointBlob* SharedRuntime::_polling_page_safepoint_handler_blob; | |
36 SafepointBlob* SharedRuntime::_polling_page_return_handler_blob; | |
37 RuntimeStub* SharedRuntime::_wrong_method_blob; | |
38 RuntimeStub* SharedRuntime::_ic_miss_blob; | |
39 RuntimeStub* SharedRuntime::_resolve_opt_virtual_call_blob; | |
40 RuntimeStub* SharedRuntime::_resolve_virtual_call_blob; | |
41 RuntimeStub* SharedRuntime::_resolve_static_call_blob; | |
42 | |
43 class RegisterSaver { | |
44 | |
45 // Used for saving volatile registers. This is Gregs, Fregs, I/L/O. | |
46 // The Oregs are problematic. In the 32bit build the compiler can | |
47 // have O registers live with 64 bit quantities. A window save will | |
48 // cut the heads off of the registers. We have to do a very extensive | |
49 // stack dance to save and restore these properly. | |
50 | |
51 // Note that the Oregs problem only exists if we block at either a polling | |
52 // page exception a compiled code safepoint that was not originally a call | |
53 // or deoptimize following one of these kinds of safepoints. | |
54 | |
55 // Lots of registers to save. For all builds, a window save will preserve | |
56 // the %i and %l registers. For the 32-bit longs-in-two entries and 64-bit | |
57 // builds a window-save will preserve the %o registers. In the LION build | |
58 // we need to save the 64-bit %o registers which requires we save them | |
59 // before the window-save (as then they become %i registers and get their | |
60 // heads chopped off on interrupt). We have to save some %g registers here | |
61 // as well. | |
62 enum { | |
63 // This frame's save area. Includes extra space for the native call: | |
64 // vararg's layout space and the like. Briefly holds the caller's | |
65 // register save area. | |
66 call_args_area = frame::register_save_words_sp_offset + | |
67 frame::memory_parameter_word_sp_offset*wordSize, | |
68 // Make sure save locations are always 8 byte aligned. | |
69 // can't use round_to because it doesn't produce compile time constant | |
70 start_of_extra_save_area = ((call_args_area + 7) & ~7), | |
71 g1_offset = start_of_extra_save_area, // g-regs needing saving | |
72 g3_offset = g1_offset+8, | |
73 g4_offset = g3_offset+8, | |
74 g5_offset = g4_offset+8, | |
75 o0_offset = g5_offset+8, | |
76 o1_offset = o0_offset+8, | |
77 o2_offset = o1_offset+8, | |
78 o3_offset = o2_offset+8, | |
79 o4_offset = o3_offset+8, | |
80 o5_offset = o4_offset+8, | |
81 start_of_flags_save_area = o5_offset+8, | |
82 ccr_offset = start_of_flags_save_area, | |
83 fsr_offset = ccr_offset + 8, | |
84 d00_offset = fsr_offset+8, // Start of float save area | |
85 register_save_size = d00_offset+8*32 | |
86 }; | |
87 | |
88 | |
89 public: | |
90 | |
91 static int Oexception_offset() { return o0_offset; }; | |
92 static int G3_offset() { return g3_offset; }; | |
93 static int G5_offset() { return g5_offset; }; | |
94 static OopMap* save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words); | |
95 static void restore_live_registers(MacroAssembler* masm); | |
96 | |
97 // During deoptimization only the result register need to be restored | |
98 // all the other values have already been extracted. | |
99 | |
100 static void restore_result_registers(MacroAssembler* masm); | |
101 }; | |
102 | |
103 OopMap* RegisterSaver::save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words) { | |
104 // Record volatile registers as callee-save values in an OopMap so their save locations will be | |
105 // propagated to the caller frame's RegisterMap during StackFrameStream construction (needed for | |
106 // deoptimization; see compiledVFrame::create_stack_value). The caller's I, L and O registers | |
107 // are saved in register windows - I's and L's in the caller's frame and O's in the stub frame | |
108 // (as the stub's I's) when the runtime routine called by the stub creates its frame. | |
109 int i; | |
110 // Always make the frame size 16 bytr aligned. | |
111 int frame_size = round_to(additional_frame_words + register_save_size, 16); | |
112 // OopMap frame size is in c2 stack slots (sizeof(jint)) not bytes or words | |
113 int frame_size_in_slots = frame_size / sizeof(jint); | |
114 // CodeBlob frame size is in words. | |
115 *total_frame_words = frame_size / wordSize; | |
116 // OopMap* map = new OopMap(*total_frame_words, 0); | |
117 OopMap* map = new OopMap(frame_size_in_slots, 0); | |
118 | |
119 #if !defined(_LP64) | |
120 | |
121 // Save 64-bit O registers; they will get their heads chopped off on a 'save'. | |
122 __ stx(O0, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8); | |
123 __ stx(O1, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8); | |
124 __ stx(O2, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+2*8); | |
125 __ stx(O3, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+3*8); | |
126 __ stx(O4, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+4*8); | |
127 __ stx(O5, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+5*8); | |
128 #endif /* _LP64 */ | |
129 | |
130 __ save(SP, -frame_size, SP); | |
131 | |
132 #ifndef _LP64 | |
133 // Reload the 64 bit Oregs. Although they are now Iregs we load them | |
134 // to Oregs here to avoid interrupts cutting off their heads | |
135 | |
136 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8, O0); | |
137 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8, O1); | |
138 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+2*8, O2); | |
139 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+3*8, O3); | |
140 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+4*8, O4); | |
141 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+5*8, O5); | |
142 | |
143 __ stx(O0, SP, o0_offset+STACK_BIAS); | |
144 map->set_callee_saved(VMRegImpl::stack2reg((o0_offset + 4)>>2), O0->as_VMReg()); | |
145 | |
146 __ stx(O1, SP, o1_offset+STACK_BIAS); | |
147 | |
148 map->set_callee_saved(VMRegImpl::stack2reg((o1_offset + 4)>>2), O1->as_VMReg()); | |
149 | |
150 __ stx(O2, SP, o2_offset+STACK_BIAS); | |
151 map->set_callee_saved(VMRegImpl::stack2reg((o2_offset + 4)>>2), O2->as_VMReg()); | |
152 | |
153 __ stx(O3, SP, o3_offset+STACK_BIAS); | |
154 map->set_callee_saved(VMRegImpl::stack2reg((o3_offset + 4)>>2), O3->as_VMReg()); | |
155 | |
156 __ stx(O4, SP, o4_offset+STACK_BIAS); | |
157 map->set_callee_saved(VMRegImpl::stack2reg((o4_offset + 4)>>2), O4->as_VMReg()); | |
158 | |
159 __ stx(O5, SP, o5_offset+STACK_BIAS); | |
160 map->set_callee_saved(VMRegImpl::stack2reg((o5_offset + 4)>>2), O5->as_VMReg()); | |
161 #endif /* _LP64 */ | |
162 | |
113
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163 |
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164 #ifdef _LP64 |
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165 int debug_offset = 0; |
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166 #else |
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167 int debug_offset = 4; |
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168 #endif |
0 | 169 // Save the G's |
170 __ stx(G1, SP, g1_offset+STACK_BIAS); | |
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171 map->set_callee_saved(VMRegImpl::stack2reg((g1_offset + debug_offset)>>2), G1->as_VMReg()); |
0 | 172 |
173 __ stx(G3, SP, g3_offset+STACK_BIAS); | |
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174 map->set_callee_saved(VMRegImpl::stack2reg((g3_offset + debug_offset)>>2), G3->as_VMReg()); |
0 | 175 |
176 __ stx(G4, SP, g4_offset+STACK_BIAS); | |
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177 map->set_callee_saved(VMRegImpl::stack2reg((g4_offset + debug_offset)>>2), G4->as_VMReg()); |
0 | 178 |
179 __ stx(G5, SP, g5_offset+STACK_BIAS); | |
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180 map->set_callee_saved(VMRegImpl::stack2reg((g5_offset + debug_offset)>>2), G5->as_VMReg()); |
0 | 181 |
182 // This is really a waste but we'll keep things as they were for now | |
183 if (true) { | |
184 #ifndef _LP64 | |
185 map->set_callee_saved(VMRegImpl::stack2reg((o0_offset)>>2), O0->as_VMReg()->next()); | |
186 map->set_callee_saved(VMRegImpl::stack2reg((o1_offset)>>2), O1->as_VMReg()->next()); | |
187 map->set_callee_saved(VMRegImpl::stack2reg((o2_offset)>>2), O2->as_VMReg()->next()); | |
188 map->set_callee_saved(VMRegImpl::stack2reg((o3_offset)>>2), O3->as_VMReg()->next()); | |
189 map->set_callee_saved(VMRegImpl::stack2reg((o4_offset)>>2), O4->as_VMReg()->next()); | |
190 map->set_callee_saved(VMRegImpl::stack2reg((o5_offset)>>2), O5->as_VMReg()->next()); | |
191 map->set_callee_saved(VMRegImpl::stack2reg((g1_offset)>>2), G1->as_VMReg()->next()); | |
192 map->set_callee_saved(VMRegImpl::stack2reg((g3_offset)>>2), G3->as_VMReg()->next()); | |
193 map->set_callee_saved(VMRegImpl::stack2reg((g4_offset)>>2), G4->as_VMReg()->next()); | |
194 map->set_callee_saved(VMRegImpl::stack2reg((g5_offset)>>2), G5->as_VMReg()->next()); | |
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195 #endif /* _LP64 */ |
0 | 196 } |
197 | |
198 | |
199 // Save the flags | |
200 __ rdccr( G5 ); | |
201 __ stx(G5, SP, ccr_offset+STACK_BIAS); | |
202 __ stxfsr(SP, fsr_offset+STACK_BIAS); | |
203 | |
204 // Save all the FP registers | |
205 int offset = d00_offset; | |
206 for( int i=0; i<64; i+=2 ) { | |
207 FloatRegister f = as_FloatRegister(i); | |
208 __ stf(FloatRegisterImpl::D, f, SP, offset+STACK_BIAS); | |
209 map->set_callee_saved(VMRegImpl::stack2reg(offset>>2), f->as_VMReg()); | |
210 if (true) { | |
211 map->set_callee_saved(VMRegImpl::stack2reg((offset + sizeof(float))>>2), f->as_VMReg()->next()); | |
212 } | |
213 offset += sizeof(double); | |
214 } | |
215 | |
216 // And we're done. | |
217 | |
218 return map; | |
219 } | |
220 | |
221 | |
222 // Pop the current frame and restore all the registers that we | |
223 // saved. | |
224 void RegisterSaver::restore_live_registers(MacroAssembler* masm) { | |
225 | |
226 // Restore all the FP registers | |
227 for( int i=0; i<64; i+=2 ) { | |
228 __ ldf(FloatRegisterImpl::D, SP, d00_offset+i*sizeof(float)+STACK_BIAS, as_FloatRegister(i)); | |
229 } | |
230 | |
231 __ ldx(SP, ccr_offset+STACK_BIAS, G1); | |
232 __ wrccr (G1) ; | |
233 | |
234 // Restore the G's | |
235 // Note that G2 (AKA GThread) must be saved and restored separately. | |
236 // TODO-FIXME: save and restore some of the other ASRs, viz., %asi and %gsr. | |
237 | |
238 __ ldx(SP, g1_offset+STACK_BIAS, G1); | |
239 __ ldx(SP, g3_offset+STACK_BIAS, G3); | |
240 __ ldx(SP, g4_offset+STACK_BIAS, G4); | |
241 __ ldx(SP, g5_offset+STACK_BIAS, G5); | |
242 | |
243 | |
244 #if !defined(_LP64) | |
245 // Restore the 64-bit O's. | |
246 __ ldx(SP, o0_offset+STACK_BIAS, O0); | |
247 __ ldx(SP, o1_offset+STACK_BIAS, O1); | |
248 __ ldx(SP, o2_offset+STACK_BIAS, O2); | |
249 __ ldx(SP, o3_offset+STACK_BIAS, O3); | |
250 __ ldx(SP, o4_offset+STACK_BIAS, O4); | |
251 __ ldx(SP, o5_offset+STACK_BIAS, O5); | |
252 | |
253 // And temporarily place them in TLS | |
254 | |
255 __ stx(O0, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8); | |
256 __ stx(O1, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8); | |
257 __ stx(O2, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+2*8); | |
258 __ stx(O3, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+3*8); | |
259 __ stx(O4, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+4*8); | |
260 __ stx(O5, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+5*8); | |
261 #endif /* _LP64 */ | |
262 | |
263 // Restore flags | |
264 | |
265 __ ldxfsr(SP, fsr_offset+STACK_BIAS); | |
266 | |
267 __ restore(); | |
268 | |
269 #if !defined(_LP64) | |
270 // Now reload the 64bit Oregs after we've restore the window. | |
271 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8, O0); | |
272 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8, O1); | |
273 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+2*8, O2); | |
274 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+3*8, O3); | |
275 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+4*8, O4); | |
276 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+5*8, O5); | |
277 #endif /* _LP64 */ | |
278 | |
279 } | |
280 | |
281 // Pop the current frame and restore the registers that might be holding | |
282 // a result. | |
283 void RegisterSaver::restore_result_registers(MacroAssembler* masm) { | |
284 | |
285 #if !defined(_LP64) | |
286 // 32bit build returns longs in G1 | |
287 __ ldx(SP, g1_offset+STACK_BIAS, G1); | |
288 | |
289 // Retrieve the 64-bit O's. | |
290 __ ldx(SP, o0_offset+STACK_BIAS, O0); | |
291 __ ldx(SP, o1_offset+STACK_BIAS, O1); | |
292 // and save to TLS | |
293 __ stx(O0, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8); | |
294 __ stx(O1, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8); | |
295 #endif /* _LP64 */ | |
296 | |
297 __ ldf(FloatRegisterImpl::D, SP, d00_offset+STACK_BIAS, as_FloatRegister(0)); | |
298 | |
299 __ restore(); | |
300 | |
301 #if !defined(_LP64) | |
302 // Now reload the 64bit Oregs after we've restore the window. | |
303 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8, O0); | |
304 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8, O1); | |
305 #endif /* _LP64 */ | |
306 | |
307 } | |
308 | |
309 // The java_calling_convention describes stack locations as ideal slots on | |
310 // a frame with no abi restrictions. Since we must observe abi restrictions | |
311 // (like the placement of the register window) the slots must be biased by | |
312 // the following value. | |
313 static int reg2offset(VMReg r) { | |
314 return (r->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size; | |
315 } | |
316 | |
317 // --------------------------------------------------------------------------- | |
318 // Read the array of BasicTypes from a signature, and compute where the | |
319 // arguments should go. Values in the VMRegPair regs array refer to 4-byte (VMRegImpl::stack_slot_size) | |
320 // quantities. Values less than VMRegImpl::stack0 are registers, those above | |
321 // refer to 4-byte stack slots. All stack slots are based off of the window | |
322 // top. VMRegImpl::stack0 refers to the first slot past the 16-word window, | |
323 // and VMRegImpl::stack0+1 refers to the memory word 4-byes higher. Register | |
324 // values 0-63 (up to RegisterImpl::number_of_registers) are the 64-bit | |
325 // integer registers. Values 64-95 are the (32-bit only) float registers. | |
326 // Each 32-bit quantity is given its own number, so the integer registers | |
327 // (in either 32- or 64-bit builds) use 2 numbers. For example, there is | |
328 // an O0-low and an O0-high. Essentially, all int register numbers are doubled. | |
329 | |
330 // Register results are passed in O0-O5, for outgoing call arguments. To | |
331 // convert to incoming arguments, convert all O's to I's. The regs array | |
332 // refer to the low and hi 32-bit words of 64-bit registers or stack slots. | |
333 // If the regs[].second() field is set to VMRegImpl::Bad(), it means it's unused (a | |
334 // 32-bit value was passed). If both are VMRegImpl::Bad(), it means no value was | |
335 // passed (used as a placeholder for the other half of longs and doubles in | |
336 // the 64-bit build). regs[].second() is either VMRegImpl::Bad() or regs[].second() is | |
337 // regs[].first()+1 (regs[].first() may be misaligned in the C calling convention). | |
338 // Sparc never passes a value in regs[].second() but not regs[].first() (regs[].first() | |
339 // == VMRegImpl::Bad() && regs[].second() != VMRegImpl::Bad()) nor unrelated values in the | |
340 // same VMRegPair. | |
341 | |
342 // Note: the INPUTS in sig_bt are in units of Java argument words, which are | |
343 // either 32-bit or 64-bit depending on the build. The OUTPUTS are in 32-bit | |
344 // units regardless of build. | |
345 | |
346 | |
347 // --------------------------------------------------------------------------- | |
348 // The compiled Java calling convention. The Java convention always passes | |
349 // 64-bit values in adjacent aligned locations (either registers or stack), | |
350 // floats in float registers and doubles in aligned float pairs. Values are | |
351 // packed in the registers. There is no backing varargs store for values in | |
352 // registers. In the 32-bit build, longs are passed in G1 and G4 (cannot be | |
353 // passed in I's, because longs in I's get their heads chopped off at | |
354 // interrupt). | |
355 int SharedRuntime::java_calling_convention(const BasicType *sig_bt, | |
356 VMRegPair *regs, | |
357 int total_args_passed, | |
358 int is_outgoing) { | |
359 assert(F31->as_VMReg()->is_reg(), "overlapping stack/register numbers"); | |
360 | |
361 // Convention is to pack the first 6 int/oop args into the first 6 registers | |
362 // (I0-I5), extras spill to the stack. Then pack the first 8 float args | |
363 // into F0-F7, extras spill to the stack. Then pad all register sets to | |
364 // align. Then put longs and doubles into the same registers as they fit, | |
365 // else spill to the stack. | |
366 const int int_reg_max = SPARC_ARGS_IN_REGS_NUM; | |
367 const int flt_reg_max = 8; | |
368 // | |
369 // Where 32-bit 1-reg longs start being passed | |
370 // In tiered we must pass on stack because c1 can't use a "pair" in a single reg. | |
371 // So make it look like we've filled all the G regs that c2 wants to use. | |
372 Register g_reg = TieredCompilation ? noreg : G1; | |
373 | |
374 // Count int/oop and float args. See how many stack slots we'll need and | |
375 // where the longs & doubles will go. | |
376 int int_reg_cnt = 0; | |
377 int flt_reg_cnt = 0; | |
378 // int stk_reg_pairs = frame::register_save_words*(wordSize>>2); | |
379 // int stk_reg_pairs = SharedRuntime::out_preserve_stack_slots(); | |
380 int stk_reg_pairs = 0; | |
381 for (int i = 0; i < total_args_passed; i++) { | |
382 switch (sig_bt[i]) { | |
383 case T_LONG: // LP64, longs compete with int args | |
384 assert(sig_bt[i+1] == T_VOID, ""); | |
385 #ifdef _LP64 | |
386 if (int_reg_cnt < int_reg_max) int_reg_cnt++; | |
387 #endif | |
388 break; | |
389 case T_OBJECT: | |
390 case T_ARRAY: | |
391 case T_ADDRESS: // Used, e.g., in slow-path locking for the lock's stack address | |
392 if (int_reg_cnt < int_reg_max) int_reg_cnt++; | |
393 #ifndef _LP64 | |
394 else stk_reg_pairs++; | |
395 #endif | |
396 break; | |
397 case T_INT: | |
398 case T_SHORT: | |
399 case T_CHAR: | |
400 case T_BYTE: | |
401 case T_BOOLEAN: | |
402 if (int_reg_cnt < int_reg_max) int_reg_cnt++; | |
403 else stk_reg_pairs++; | |
404 break; | |
405 case T_FLOAT: | |
406 if (flt_reg_cnt < flt_reg_max) flt_reg_cnt++; | |
407 else stk_reg_pairs++; | |
408 break; | |
409 case T_DOUBLE: | |
410 assert(sig_bt[i+1] == T_VOID, ""); | |
411 break; | |
412 case T_VOID: | |
413 break; | |
414 default: | |
415 ShouldNotReachHere(); | |
416 } | |
417 } | |
418 | |
419 // This is where the longs/doubles start on the stack. | |
420 stk_reg_pairs = (stk_reg_pairs+1) & ~1; // Round | |
421 | |
422 int int_reg_pairs = (int_reg_cnt+1) & ~1; // 32-bit 2-reg longs only | |
423 int flt_reg_pairs = (flt_reg_cnt+1) & ~1; | |
424 | |
425 // int stk_reg = frame::register_save_words*(wordSize>>2); | |
426 // int stk_reg = SharedRuntime::out_preserve_stack_slots(); | |
427 int stk_reg = 0; | |
428 int int_reg = 0; | |
429 int flt_reg = 0; | |
430 | |
431 // Now do the signature layout | |
432 for (int i = 0; i < total_args_passed; i++) { | |
433 switch (sig_bt[i]) { | |
434 case T_INT: | |
435 case T_SHORT: | |
436 case T_CHAR: | |
437 case T_BYTE: | |
438 case T_BOOLEAN: | |
439 #ifndef _LP64 | |
440 case T_OBJECT: | |
441 case T_ARRAY: | |
442 case T_ADDRESS: // Used, e.g., in slow-path locking for the lock's stack address | |
443 #endif // _LP64 | |
444 if (int_reg < int_reg_max) { | |
445 Register r = is_outgoing ? as_oRegister(int_reg++) : as_iRegister(int_reg++); | |
446 regs[i].set1(r->as_VMReg()); | |
447 } else { | |
448 regs[i].set1(VMRegImpl::stack2reg(stk_reg++)); | |
449 } | |
450 break; | |
451 | |
452 #ifdef _LP64 | |
453 case T_OBJECT: | |
454 case T_ARRAY: | |
455 case T_ADDRESS: // Used, e.g., in slow-path locking for the lock's stack address | |
456 if (int_reg < int_reg_max) { | |
457 Register r = is_outgoing ? as_oRegister(int_reg++) : as_iRegister(int_reg++); | |
458 regs[i].set2(r->as_VMReg()); | |
459 } else { | |
460 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
461 stk_reg_pairs += 2; | |
462 } | |
463 break; | |
464 #endif // _LP64 | |
465 | |
466 case T_LONG: | |
467 assert(sig_bt[i+1] == T_VOID, "expecting VOID in other half"); | |
468 #ifdef COMPILER2 | |
469 #ifdef _LP64 | |
470 // Can't be tiered (yet) | |
471 if (int_reg < int_reg_max) { | |
472 Register r = is_outgoing ? as_oRegister(int_reg++) : as_iRegister(int_reg++); | |
473 regs[i].set2(r->as_VMReg()); | |
474 } else { | |
475 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
476 stk_reg_pairs += 2; | |
477 } | |
478 #else | |
479 // For 32-bit build, can't pass longs in O-regs because they become | |
480 // I-regs and get trashed. Use G-regs instead. G1 and G4 are almost | |
481 // spare and available. This convention isn't used by the Sparc ABI or | |
482 // anywhere else. If we're tiered then we don't use G-regs because c1 | |
483 // can't deal with them as a "pair". | |
484 // G0: zero | |
485 // G1: 1st Long arg | |
486 // G2: global allocated to TLS | |
487 // G3: used in inline cache check | |
488 // G4: 2nd Long arg | |
489 // G5: used in inline cache check | |
490 // G6: used by OS | |
491 // G7: used by OS | |
492 | |
493 if (g_reg == G1) { | |
494 regs[i].set2(G1->as_VMReg()); // This long arg in G1 | |
495 g_reg = G4; // Where the next arg goes | |
496 } else if (g_reg == G4) { | |
497 regs[i].set2(G4->as_VMReg()); // The 2nd long arg in G4 | |
498 g_reg = noreg; // No more longs in registers | |
499 } else { | |
500 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
501 stk_reg_pairs += 2; | |
502 } | |
503 #endif // _LP64 | |
504 #else // COMPILER2 | |
505 if (int_reg_pairs + 1 < int_reg_max) { | |
506 if (is_outgoing) { | |
507 regs[i].set_pair(as_oRegister(int_reg_pairs + 1)->as_VMReg(), as_oRegister(int_reg_pairs)->as_VMReg()); | |
508 } else { | |
509 regs[i].set_pair(as_iRegister(int_reg_pairs + 1)->as_VMReg(), as_iRegister(int_reg_pairs)->as_VMReg()); | |
510 } | |
511 int_reg_pairs += 2; | |
512 } else { | |
513 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
514 stk_reg_pairs += 2; | |
515 } | |
516 #endif // COMPILER2 | |
517 break; | |
518 | |
519 case T_FLOAT: | |
520 if (flt_reg < flt_reg_max) regs[i].set1(as_FloatRegister(flt_reg++)->as_VMReg()); | |
521 else regs[i].set1( VMRegImpl::stack2reg(stk_reg++)); | |
522 break; | |
523 case T_DOUBLE: | |
524 assert(sig_bt[i+1] == T_VOID, "expecting half"); | |
525 if (flt_reg_pairs + 1 < flt_reg_max) { | |
526 regs[i].set2(as_FloatRegister(flt_reg_pairs)->as_VMReg()); | |
527 flt_reg_pairs += 2; | |
528 } else { | |
529 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
530 stk_reg_pairs += 2; | |
531 } | |
532 break; | |
533 case T_VOID: regs[i].set_bad(); break; // Halves of longs & doubles | |
534 default: | |
535 ShouldNotReachHere(); | |
536 } | |
537 } | |
538 | |
539 // retun the amount of stack space these arguments will need. | |
540 return stk_reg_pairs; | |
541 | |
542 } | |
543 | |
544 // Helper class mostly to avoid passing masm everywhere, and handle store | |
545 // displacement overflow logic for LP64 | |
546 class AdapterGenerator { | |
547 MacroAssembler *masm; | |
548 #ifdef _LP64 | |
549 Register Rdisp; | |
550 void set_Rdisp(Register r) { Rdisp = r; } | |
551 #endif // _LP64 | |
552 | |
553 void patch_callers_callsite(); | |
554 void tag_c2i_arg(frame::Tag t, Register base, int st_off, Register scratch); | |
555 | |
556 // base+st_off points to top of argument | |
557 int arg_offset(const int st_off) { return st_off + Interpreter::value_offset_in_bytes(); } | |
558 int next_arg_offset(const int st_off) { | |
559 return st_off - Interpreter::stackElementSize() + Interpreter::value_offset_in_bytes(); | |
560 } | |
561 | |
562 #ifdef _LP64 | |
563 // On _LP64 argument slot values are loaded first into a register | |
564 // because they might not fit into displacement. | |
565 Register arg_slot(const int st_off); | |
566 Register next_arg_slot(const int st_off); | |
567 #else | |
568 int arg_slot(const int st_off) { return arg_offset(st_off); } | |
569 int next_arg_slot(const int st_off) { return next_arg_offset(st_off); } | |
570 #endif // _LP64 | |
571 | |
572 // Stores long into offset pointed to by base | |
573 void store_c2i_long(Register r, Register base, | |
574 const int st_off, bool is_stack); | |
575 void store_c2i_object(Register r, Register base, | |
576 const int st_off); | |
577 void store_c2i_int(Register r, Register base, | |
578 const int st_off); | |
579 void store_c2i_double(VMReg r_2, | |
580 VMReg r_1, Register base, const int st_off); | |
581 void store_c2i_float(FloatRegister f, Register base, | |
582 const int st_off); | |
583 | |
584 public: | |
585 void gen_c2i_adapter(int total_args_passed, | |
586 // VMReg max_arg, | |
587 int comp_args_on_stack, // VMRegStackSlots | |
588 const BasicType *sig_bt, | |
589 const VMRegPair *regs, | |
590 Label& skip_fixup); | |
591 void gen_i2c_adapter(int total_args_passed, | |
592 // VMReg max_arg, | |
593 int comp_args_on_stack, // VMRegStackSlots | |
594 const BasicType *sig_bt, | |
595 const VMRegPair *regs); | |
596 | |
597 AdapterGenerator(MacroAssembler *_masm) : masm(_masm) {} | |
598 }; | |
599 | |
600 | |
601 // Patch the callers callsite with entry to compiled code if it exists. | |
602 void AdapterGenerator::patch_callers_callsite() { | |
603 Label L; | |
604 __ ld_ptr(G5_method, in_bytes(methodOopDesc::code_offset()), G3_scratch); | |
605 __ br_null(G3_scratch, false, __ pt, L); | |
606 // Schedule the branch target address early. | |
607 __ delayed()->ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), G3_scratch); | |
608 // Call into the VM to patch the caller, then jump to compiled callee | |
609 __ save_frame(4); // Args in compiled layout; do not blow them | |
610 | |
611 // Must save all the live Gregs the list is: | |
612 // G1: 1st Long arg (32bit build) | |
613 // G2: global allocated to TLS | |
614 // G3: used in inline cache check (scratch) | |
615 // G4: 2nd Long arg (32bit build); | |
616 // G5: used in inline cache check (methodOop) | |
617 | |
618 // The longs must go to the stack by hand since in the 32 bit build they can be trashed by window ops. | |
619 | |
620 #ifdef _LP64 | |
621 // mov(s,d) | |
622 __ mov(G1, L1); | |
623 __ mov(G4, L4); | |
624 __ mov(G5_method, L5); | |
625 __ mov(G5_method, O0); // VM needs target method | |
626 __ mov(I7, O1); // VM needs caller's callsite | |
627 // Must be a leaf call... | |
628 // can be very far once the blob has been relocated | |
629 Address dest(O7, CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite)); | |
630 __ relocate(relocInfo::runtime_call_type); | |
631 __ jumpl_to(dest, O7); | |
632 __ delayed()->mov(G2_thread, L7_thread_cache); | |
633 __ mov(L7_thread_cache, G2_thread); | |
634 __ mov(L1, G1); | |
635 __ mov(L4, G4); | |
636 __ mov(L5, G5_method); | |
637 #else | |
638 __ stx(G1, FP, -8 + STACK_BIAS); | |
639 __ stx(G4, FP, -16 + STACK_BIAS); | |
640 __ mov(G5_method, L5); | |
641 __ mov(G5_method, O0); // VM needs target method | |
642 __ mov(I7, O1); // VM needs caller's callsite | |
643 // Must be a leaf call... | |
644 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite), relocInfo::runtime_call_type); | |
645 __ delayed()->mov(G2_thread, L7_thread_cache); | |
646 __ mov(L7_thread_cache, G2_thread); | |
647 __ ldx(FP, -8 + STACK_BIAS, G1); | |
648 __ ldx(FP, -16 + STACK_BIAS, G4); | |
649 __ mov(L5, G5_method); | |
650 __ ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), G3_scratch); | |
651 #endif /* _LP64 */ | |
652 | |
653 __ restore(); // Restore args | |
654 __ bind(L); | |
655 } | |
656 | |
657 void AdapterGenerator::tag_c2i_arg(frame::Tag t, Register base, int st_off, | |
658 Register scratch) { | |
659 if (TaggedStackInterpreter) { | |
660 int tag_off = st_off + Interpreter::tag_offset_in_bytes(); | |
661 #ifdef _LP64 | |
662 Register tag_slot = Rdisp; | |
663 __ set(tag_off, tag_slot); | |
664 #else | |
665 int tag_slot = tag_off; | |
666 #endif // _LP64 | |
667 // have to store zero because local slots can be reused (rats!) | |
668 if (t == frame::TagValue) { | |
669 __ st_ptr(G0, base, tag_slot); | |
670 } else if (t == frame::TagCategory2) { | |
671 __ st_ptr(G0, base, tag_slot); | |
672 int next_tag_off = st_off - Interpreter::stackElementSize() + | |
673 Interpreter::tag_offset_in_bytes(); | |
674 #ifdef _LP64 | |
675 __ set(next_tag_off, tag_slot); | |
676 #else | |
677 tag_slot = next_tag_off; | |
678 #endif // _LP64 | |
679 __ st_ptr(G0, base, tag_slot); | |
680 } else { | |
681 __ mov(t, scratch); | |
682 __ st_ptr(scratch, base, tag_slot); | |
683 } | |
684 } | |
685 } | |
686 | |
687 #ifdef _LP64 | |
688 Register AdapterGenerator::arg_slot(const int st_off) { | |
689 __ set( arg_offset(st_off), Rdisp); | |
690 return Rdisp; | |
691 } | |
692 | |
693 Register AdapterGenerator::next_arg_slot(const int st_off){ | |
694 __ set( next_arg_offset(st_off), Rdisp); | |
695 return Rdisp; | |
696 } | |
697 #endif // _LP64 | |
698 | |
699 // Stores long into offset pointed to by base | |
700 void AdapterGenerator::store_c2i_long(Register r, Register base, | |
701 const int st_off, bool is_stack) { | |
702 #ifdef COMPILER2 | |
703 #ifdef _LP64 | |
704 // In V9, longs are given 2 64-bit slots in the interpreter, but the | |
705 // data is passed in only 1 slot. | |
706 __ stx(r, base, next_arg_slot(st_off)); | |
707 #else | |
708 // Misaligned store of 64-bit data | |
709 __ stw(r, base, arg_slot(st_off)); // lo bits | |
710 __ srlx(r, 32, r); | |
711 __ stw(r, base, next_arg_slot(st_off)); // hi bits | |
712 #endif // _LP64 | |
713 #else | |
714 if (is_stack) { | |
715 // Misaligned store of 64-bit data | |
716 __ stw(r, base, arg_slot(st_off)); // lo bits | |
717 __ srlx(r, 32, r); | |
718 __ stw(r, base, next_arg_slot(st_off)); // hi bits | |
719 } else { | |
720 __ stw(r->successor(), base, arg_slot(st_off) ); // lo bits | |
721 __ stw(r , base, next_arg_slot(st_off)); // hi bits | |
722 } | |
723 #endif // COMPILER2 | |
724 tag_c2i_arg(frame::TagCategory2, base, st_off, r); | |
725 } | |
726 | |
727 void AdapterGenerator::store_c2i_object(Register r, Register base, | |
728 const int st_off) { | |
729 __ st_ptr (r, base, arg_slot(st_off)); | |
730 tag_c2i_arg(frame::TagReference, base, st_off, r); | |
731 } | |
732 | |
733 void AdapterGenerator::store_c2i_int(Register r, Register base, | |
734 const int st_off) { | |
735 __ st (r, base, arg_slot(st_off)); | |
736 tag_c2i_arg(frame::TagValue, base, st_off, r); | |
737 } | |
738 | |
739 // Stores into offset pointed to by base | |
740 void AdapterGenerator::store_c2i_double(VMReg r_2, | |
741 VMReg r_1, Register base, const int st_off) { | |
742 #ifdef _LP64 | |
743 // In V9, doubles are given 2 64-bit slots in the interpreter, but the | |
744 // data is passed in only 1 slot. | |
745 __ stf(FloatRegisterImpl::D, r_1->as_FloatRegister(), base, next_arg_slot(st_off)); | |
746 #else | |
747 // Need to marshal 64-bit value from misaligned Lesp loads | |
748 __ stf(FloatRegisterImpl::S, r_1->as_FloatRegister(), base, next_arg_slot(st_off)); | |
749 __ stf(FloatRegisterImpl::S, r_2->as_FloatRegister(), base, arg_slot(st_off) ); | |
750 #endif | |
751 tag_c2i_arg(frame::TagCategory2, base, st_off, G1_scratch); | |
752 } | |
753 | |
754 void AdapterGenerator::store_c2i_float(FloatRegister f, Register base, | |
755 const int st_off) { | |
756 __ stf(FloatRegisterImpl::S, f, base, arg_slot(st_off)); | |
757 tag_c2i_arg(frame::TagValue, base, st_off, G1_scratch); | |
758 } | |
759 | |
760 void AdapterGenerator::gen_c2i_adapter( | |
761 int total_args_passed, | |
762 // VMReg max_arg, | |
763 int comp_args_on_stack, // VMRegStackSlots | |
764 const BasicType *sig_bt, | |
765 const VMRegPair *regs, | |
766 Label& skip_fixup) { | |
767 | |
768 // Before we get into the guts of the C2I adapter, see if we should be here | |
769 // at all. We've come from compiled code and are attempting to jump to the | |
770 // interpreter, which means the caller made a static call to get here | |
771 // (vcalls always get a compiled target if there is one). Check for a | |
772 // compiled target. If there is one, we need to patch the caller's call. | |
773 // However we will run interpreted if we come thru here. The next pass | |
774 // thru the call site will run compiled. If we ran compiled here then | |
775 // we can (theorectically) do endless i2c->c2i->i2c transitions during | |
776 // deopt/uncommon trap cycles. If we always go interpreted here then | |
777 // we can have at most one and don't need to play any tricks to keep | |
778 // from endlessly growing the stack. | |
779 // | |
780 // Actually if we detected that we had an i2c->c2i transition here we | |
781 // ought to be able to reset the world back to the state of the interpreted | |
782 // call and not bother building another interpreter arg area. We don't | |
783 // do that at this point. | |
784 | |
785 patch_callers_callsite(); | |
786 | |
787 __ bind(skip_fixup); | |
788 | |
789 // Since all args are passed on the stack, total_args_passed*wordSize is the | |
790 // space we need. Add in varargs area needed by the interpreter. Round up | |
791 // to stack alignment. | |
792 const int arg_size = total_args_passed * Interpreter::stackElementSize(); | |
793 const int varargs_area = | |
794 (frame::varargs_offset - frame::register_save_words)*wordSize; | |
795 const int extraspace = round_to(arg_size + varargs_area, 2*wordSize); | |
796 | |
797 int bias = STACK_BIAS; | |
798 const int interp_arg_offset = frame::varargs_offset*wordSize + | |
799 (total_args_passed-1)*Interpreter::stackElementSize(); | |
800 | |
801 Register base = SP; | |
802 | |
803 #ifdef _LP64 | |
804 // In the 64bit build because of wider slots and STACKBIAS we can run | |
805 // out of bits in the displacement to do loads and stores. Use g3 as | |
806 // temporary displacement. | |
807 if (! __ is_simm13(extraspace)) { | |
808 __ set(extraspace, G3_scratch); | |
809 __ sub(SP, G3_scratch, SP); | |
810 } else { | |
811 __ sub(SP, extraspace, SP); | |
812 } | |
813 set_Rdisp(G3_scratch); | |
814 #else | |
815 __ sub(SP, extraspace, SP); | |
816 #endif // _LP64 | |
817 | |
818 // First write G1 (if used) to where ever it must go | |
819 for (int i=0; i<total_args_passed; i++) { | |
820 const int st_off = interp_arg_offset - (i*Interpreter::stackElementSize()) + bias; | |
821 VMReg r_1 = regs[i].first(); | |
822 VMReg r_2 = regs[i].second(); | |
823 if (r_1 == G1_scratch->as_VMReg()) { | |
824 if (sig_bt[i] == T_OBJECT || sig_bt[i] == T_ARRAY) { | |
825 store_c2i_object(G1_scratch, base, st_off); | |
826 } else if (sig_bt[i] == T_LONG) { | |
827 assert(!TieredCompilation, "should not use register args for longs"); | |
828 store_c2i_long(G1_scratch, base, st_off, false); | |
829 } else { | |
830 store_c2i_int(G1_scratch, base, st_off); | |
831 } | |
832 } | |
833 } | |
834 | |
835 // Now write the args into the outgoing interpreter space | |
836 for (int i=0; i<total_args_passed; i++) { | |
837 const int st_off = interp_arg_offset - (i*Interpreter::stackElementSize()) + bias; | |
838 VMReg r_1 = regs[i].first(); | |
839 VMReg r_2 = regs[i].second(); | |
840 if (!r_1->is_valid()) { | |
841 assert(!r_2->is_valid(), ""); | |
842 continue; | |
843 } | |
844 // Skip G1 if found as we did it first in order to free it up | |
845 if (r_1 == G1_scratch->as_VMReg()) { | |
846 continue; | |
847 } | |
848 #ifdef ASSERT | |
849 bool G1_forced = false; | |
850 #endif // ASSERT | |
851 if (r_1->is_stack()) { // Pretend stack targets are loaded into G1 | |
852 #ifdef _LP64 | |
853 Register ld_off = Rdisp; | |
854 __ set(reg2offset(r_1) + extraspace + bias, ld_off); | |
855 #else | |
856 int ld_off = reg2offset(r_1) + extraspace + bias; | |
857 #ifdef ASSERT | |
858 G1_forced = true; | |
859 #endif // ASSERT | |
860 #endif // _LP64 | |
861 r_1 = G1_scratch->as_VMReg();// as part of the load/store shuffle | |
862 if (!r_2->is_valid()) __ ld (base, ld_off, G1_scratch); | |
863 else __ ldx(base, ld_off, G1_scratch); | |
864 } | |
865 | |
866 if (r_1->is_Register()) { | |
867 Register r = r_1->as_Register()->after_restore(); | |
868 if (sig_bt[i] == T_OBJECT || sig_bt[i] == T_ARRAY) { | |
869 store_c2i_object(r, base, st_off); | |
870 } else if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
871 if (TieredCompilation) { | |
872 assert(G1_forced || sig_bt[i] != T_LONG, "should not use register args for longs"); | |
873 } | |
874 store_c2i_long(r, base, st_off, r_2->is_stack()); | |
875 } else { | |
876 store_c2i_int(r, base, st_off); | |
877 } | |
878 } else { | |
879 assert(r_1->is_FloatRegister(), ""); | |
880 if (sig_bt[i] == T_FLOAT) { | |
881 store_c2i_float(r_1->as_FloatRegister(), base, st_off); | |
882 } else { | |
883 assert(sig_bt[i] == T_DOUBLE, "wrong type"); | |
884 store_c2i_double(r_2, r_1, base, st_off); | |
885 } | |
886 } | |
887 } | |
888 | |
889 #ifdef _LP64 | |
890 // Need to reload G3_scratch, used for temporary displacements. | |
891 __ ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), G3_scratch); | |
892 | |
893 // Pass O5_savedSP as an argument to the interpreter. | |
894 // The interpreter will restore SP to this value before returning. | |
895 __ set(extraspace, G1); | |
896 __ add(SP, G1, O5_savedSP); | |
897 #else | |
898 // Pass O5_savedSP as an argument to the interpreter. | |
899 // The interpreter will restore SP to this value before returning. | |
900 __ add(SP, extraspace, O5_savedSP); | |
901 #endif // _LP64 | |
902 | |
903 __ mov((frame::varargs_offset)*wordSize - | |
904 1*Interpreter::stackElementSize()+bias+BytesPerWord, G1); | |
905 // Jump to the interpreter just as if interpreter was doing it. | |
906 __ jmpl(G3_scratch, 0, G0); | |
907 // Setup Lesp for the call. Cannot actually set Lesp as the current Lesp | |
908 // (really L0) is in use by the compiled frame as a generic temp. However, | |
909 // the interpreter does not know where its args are without some kind of | |
910 // arg pointer being passed in. Pass it in Gargs. | |
911 __ delayed()->add(SP, G1, Gargs); | |
912 } | |
913 | |
914 void AdapterGenerator::gen_i2c_adapter( | |
915 int total_args_passed, | |
916 // VMReg max_arg, | |
917 int comp_args_on_stack, // VMRegStackSlots | |
918 const BasicType *sig_bt, | |
919 const VMRegPair *regs) { | |
920 | |
921 // Generate an I2C adapter: adjust the I-frame to make space for the C-frame | |
922 // layout. Lesp was saved by the calling I-frame and will be restored on | |
923 // return. Meanwhile, outgoing arg space is all owned by the callee | |
924 // C-frame, so we can mangle it at will. After adjusting the frame size, | |
925 // hoist register arguments and repack other args according to the compiled | |
926 // code convention. Finally, end in a jump to the compiled code. The entry | |
927 // point address is the start of the buffer. | |
928 | |
929 // We will only enter here from an interpreted frame and never from after | |
930 // passing thru a c2i. Azul allowed this but we do not. If we lose the | |
931 // race and use a c2i we will remain interpreted for the race loser(s). | |
932 // This removes all sorts of headaches on the x86 side and also eliminates | |
933 // the possibility of having c2i -> i2c -> c2i -> ... endless transitions. | |
934 | |
935 // As you can see from the list of inputs & outputs there are not a lot | |
936 // of temp registers to work with: mostly G1, G3 & G4. | |
937 | |
938 // Inputs: | |
939 // G2_thread - TLS | |
940 // G5_method - Method oop | |
941 // O0 - Flag telling us to restore SP from O5 | |
942 // O4_args - Pointer to interpreter's args | |
943 // O5 - Caller's saved SP, to be restored if needed | |
944 // O6 - Current SP! | |
945 // O7 - Valid return address | |
946 // L0-L7, I0-I7 - Caller's temps (no frame pushed yet) | |
947 | |
948 // Outputs: | |
949 // G2_thread - TLS | |
950 // G1, G4 - Outgoing long args in 32-bit build | |
951 // O0-O5 - Outgoing args in compiled layout | |
952 // O6 - Adjusted or restored SP | |
953 // O7 - Valid return address | |
954 // L0-L7, I0-I7 - Caller's temps (no frame pushed yet) | |
955 // F0-F7 - more outgoing args | |
956 | |
957 | |
958 // O4 is about to get loaded up with compiled callee's args | |
959 __ sub(Gargs, BytesPerWord, Gargs); | |
960 | |
961 #ifdef ASSERT | |
962 { | |
963 // on entry OsavedSP and SP should be equal | |
964 Label ok; | |
965 __ cmp(O5_savedSP, SP); | |
966 __ br(Assembler::equal, false, Assembler::pt, ok); | |
967 __ delayed()->nop(); | |
968 __ stop("I5_savedSP not set"); | |
969 __ should_not_reach_here(); | |
970 __ bind(ok); | |
971 } | |
972 #endif | |
973 | |
974 // ON ENTRY TO THE CODE WE ARE MAKING, WE HAVE AN INTERPRETED FRAME | |
975 // WITH O7 HOLDING A VALID RETURN PC | |
976 // | |
977 // | | | |
978 // : java stack : | |
979 // | | | |
980 // +--------------+ <--- start of outgoing args | |
981 // | receiver | | | |
982 // : rest of args : |---size is java-arg-words | |
983 // | | | | |
984 // +--------------+ <--- O4_args (misaligned) and Lesp if prior is not C2I | |
985 // | | | | |
986 // : unused : |---Space for max Java stack, plus stack alignment | |
987 // | | | | |
988 // +--------------+ <--- SP + 16*wordsize | |
989 // | | | |
990 // : window : | |
991 // | | | |
992 // +--------------+ <--- SP | |
993 | |
994 // WE REPACK THE STACK. We use the common calling convention layout as | |
995 // discovered by calling SharedRuntime::calling_convention. We assume it | |
996 // causes an arbitrary shuffle of memory, which may require some register | |
997 // temps to do the shuffle. We hope for (and optimize for) the case where | |
998 // temps are not needed. We may have to resize the stack slightly, in case | |
999 // we need alignment padding (32-bit interpreter can pass longs & doubles | |
1000 // misaligned, but the compilers expect them aligned). | |
1001 // | |
1002 // | | | |
1003 // : java stack : | |
1004 // | | | |
1005 // +--------------+ <--- start of outgoing args | |
1006 // | pad, align | | | |
1007 // +--------------+ | | |
1008 // | ints, floats | |---Outgoing stack args, packed low. | |
1009 // +--------------+ | First few args in registers. | |
1010 // : doubles : | | |
1011 // | longs | | | |
1012 // +--------------+ <--- SP' + 16*wordsize | |
1013 // | | | |
1014 // : window : | |
1015 // | | | |
1016 // +--------------+ <--- SP' | |
1017 | |
1018 // ON EXIT FROM THE CODE WE ARE MAKING, WE STILL HAVE AN INTERPRETED FRAME | |
1019 // WITH O7 HOLDING A VALID RETURN PC - ITS JUST THAT THE ARGS ARE NOW SETUP | |
1020 // FOR COMPILED CODE AND THE FRAME SLIGHTLY GROWN. | |
1021 | |
1022 // Cut-out for having no stack args. Since up to 6 args are passed | |
1023 // in registers, we will commonly have no stack args. | |
1024 if (comp_args_on_stack > 0) { | |
1025 | |
1026 // Convert VMReg stack slots to words. | |
1027 int comp_words_on_stack = round_to(comp_args_on_stack*VMRegImpl::stack_slot_size, wordSize)>>LogBytesPerWord; | |
1028 // Round up to miminum stack alignment, in wordSize | |
1029 comp_words_on_stack = round_to(comp_words_on_stack, 2); | |
1030 // Now compute the distance from Lesp to SP. This calculation does not | |
1031 // include the space for total_args_passed because Lesp has not yet popped | |
1032 // the arguments. | |
1033 __ sub(SP, (comp_words_on_stack)*wordSize, SP); | |
1034 } | |
1035 | |
1036 // Will jump to the compiled code just as if compiled code was doing it. | |
1037 // Pre-load the register-jump target early, to schedule it better. | |
1038 __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3); | |
1039 | |
1040 // Now generate the shuffle code. Pick up all register args and move the | |
1041 // rest through G1_scratch. | |
1042 for (int i=0; i<total_args_passed; i++) { | |
1043 if (sig_bt[i] == T_VOID) { | |
1044 // Longs and doubles are passed in native word order, but misaligned | |
1045 // in the 32-bit build. | |
1046 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
1047 continue; | |
1048 } | |
1049 | |
1050 // Pick up 0, 1 or 2 words from Lesp+offset. Assume mis-aligned in the | |
1051 // 32-bit build and aligned in the 64-bit build. Look for the obvious | |
1052 // ldx/lddf optimizations. | |
1053 | |
1054 // Load in argument order going down. | |
1055 const int ld_off = (total_args_passed-i)*Interpreter::stackElementSize(); | |
1056 #ifdef _LP64 | |
1057 set_Rdisp(G1_scratch); | |
1058 #endif // _LP64 | |
1059 | |
1060 VMReg r_1 = regs[i].first(); | |
1061 VMReg r_2 = regs[i].second(); | |
1062 if (!r_1->is_valid()) { | |
1063 assert(!r_2->is_valid(), ""); | |
1064 continue; | |
1065 } | |
1066 if (r_1->is_stack()) { // Pretend stack targets are loaded into F8/F9 | |
1067 r_1 = F8->as_VMReg(); // as part of the load/store shuffle | |
1068 if (r_2->is_valid()) r_2 = r_1->next(); | |
1069 } | |
1070 if (r_1->is_Register()) { // Register argument | |
1071 Register r = r_1->as_Register()->after_restore(); | |
1072 if (!r_2->is_valid()) { | |
1073 __ ld(Gargs, arg_slot(ld_off), r); | |
1074 } else { | |
1075 #ifdef _LP64 | |
1076 // In V9, longs are given 2 64-bit slots in the interpreter, but the | |
1077 // data is passed in only 1 slot. | |
1078 Register slot = (sig_bt[i]==T_LONG) ? | |
1079 next_arg_slot(ld_off) : arg_slot(ld_off); | |
1080 __ ldx(Gargs, slot, r); | |
1081 #else | |
1082 // Need to load a 64-bit value into G1/G4, but G1/G4 is being used in the | |
1083 // stack shuffle. Load the first 2 longs into G1/G4 later. | |
1084 #endif | |
1085 } | |
1086 } else { | |
1087 assert(r_1->is_FloatRegister(), ""); | |
1088 if (!r_2->is_valid()) { | |
1089 __ ldf(FloatRegisterImpl::S, Gargs, arg_slot(ld_off), r_1->as_FloatRegister()); | |
1090 } else { | |
1091 #ifdef _LP64 | |
1092 // In V9, doubles are given 2 64-bit slots in the interpreter, but the | |
1093 // data is passed in only 1 slot. This code also handles longs that | |
1094 // are passed on the stack, but need a stack-to-stack move through a | |
1095 // spare float register. | |
1096 Register slot = (sig_bt[i]==T_LONG || sig_bt[i] == T_DOUBLE) ? | |
1097 next_arg_slot(ld_off) : arg_slot(ld_off); | |
1098 __ ldf(FloatRegisterImpl::D, Gargs, slot, r_1->as_FloatRegister()); | |
1099 #else | |
1100 // Need to marshal 64-bit value from misaligned Lesp loads | |
1101 __ ldf(FloatRegisterImpl::S, Gargs, next_arg_slot(ld_off), r_1->as_FloatRegister()); | |
1102 __ ldf(FloatRegisterImpl::S, Gargs, arg_slot(ld_off), r_2->as_FloatRegister()); | |
1103 #endif | |
1104 } | |
1105 } | |
1106 // Was the argument really intended to be on the stack, but was loaded | |
1107 // into F8/F9? | |
1108 if (regs[i].first()->is_stack()) { | |
1109 assert(r_1->as_FloatRegister() == F8, "fix this code"); | |
1110 // Convert stack slot to an SP offset | |
1111 int st_off = reg2offset(regs[i].first()) + STACK_BIAS; | |
1112 // Store down the shuffled stack word. Target address _is_ aligned. | |
1113 if (!r_2->is_valid()) __ stf(FloatRegisterImpl::S, r_1->as_FloatRegister(), SP, st_off); | |
1114 else __ stf(FloatRegisterImpl::D, r_1->as_FloatRegister(), SP, st_off); | |
1115 } | |
1116 } | |
1117 bool made_space = false; | |
1118 #ifndef _LP64 | |
1119 // May need to pick up a few long args in G1/G4 | |
1120 bool g4_crushed = false; | |
1121 bool g3_crushed = false; | |
1122 for (int i=0; i<total_args_passed; i++) { | |
1123 if (regs[i].first()->is_Register() && regs[i].second()->is_valid()) { | |
1124 // Load in argument order going down | |
1125 int ld_off = (total_args_passed-i)*Interpreter::stackElementSize(); | |
1126 // Need to marshal 64-bit value from misaligned Lesp loads | |
1127 Register r = regs[i].first()->as_Register()->after_restore(); | |
1128 if (r == G1 || r == G4) { | |
1129 assert(!g4_crushed, "ordering problem"); | |
1130 if (r == G4){ | |
1131 g4_crushed = true; | |
1132 __ lduw(Gargs, arg_slot(ld_off) , G3_scratch); // Load lo bits | |
1133 __ ld (Gargs, next_arg_slot(ld_off), r); // Load hi bits | |
1134 } else { | |
1135 // better schedule this way | |
1136 __ ld (Gargs, next_arg_slot(ld_off), r); // Load hi bits | |
1137 __ lduw(Gargs, arg_slot(ld_off) , G3_scratch); // Load lo bits | |
1138 } | |
1139 g3_crushed = true; | |
1140 __ sllx(r, 32, r); | |
1141 __ or3(G3_scratch, r, r); | |
1142 } else { | |
1143 assert(r->is_out(), "longs passed in two O registers"); | |
1144 __ ld (Gargs, arg_slot(ld_off) , r->successor()); // Load lo bits | |
1145 __ ld (Gargs, next_arg_slot(ld_off), r); // Load hi bits | |
1146 } | |
1147 } | |
1148 } | |
1149 #endif | |
1150 | |
1151 // Jump to the compiled code just as if compiled code was doing it. | |
1152 // | |
1153 #ifndef _LP64 | |
1154 if (g3_crushed) { | |
1155 // Rats load was wasted, at least it is in cache... | |
1156 __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3); | |
1157 } | |
1158 #endif /* _LP64 */ | |
1159 | |
1160 // 6243940 We might end up in handle_wrong_method if | |
1161 // the callee is deoptimized as we race thru here. If that | |
1162 // happens we don't want to take a safepoint because the | |
1163 // caller frame will look interpreted and arguments are now | |
1164 // "compiled" so it is much better to make this transition | |
1165 // invisible to the stack walking code. Unfortunately if | |
1166 // we try and find the callee by normal means a safepoint | |
1167 // is possible. So we stash the desired callee in the thread | |
1168 // and the vm will find there should this case occur. | |
1169 Address callee_target_addr(G2_thread, 0, in_bytes(JavaThread::callee_target_offset())); | |
1170 __ st_ptr(G5_method, callee_target_addr); | |
1171 | |
1172 if (StressNonEntrant) { | |
1173 // Open a big window for deopt failure | |
1174 __ save_frame(0); | |
1175 __ mov(G0, L0); | |
1176 Label loop; | |
1177 __ bind(loop); | |
1178 __ sub(L0, 1, L0); | |
1179 __ br_null(L0, false, Assembler::pt, loop); | |
1180 __ delayed()->nop(); | |
1181 | |
1182 __ restore(); | |
1183 } | |
1184 | |
1185 | |
1186 __ jmpl(G3, 0, G0); | |
1187 __ delayed()->nop(); | |
1188 } | |
1189 | |
1190 // --------------------------------------------------------------- | |
1191 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm, | |
1192 int total_args_passed, | |
1193 // VMReg max_arg, | |
1194 int comp_args_on_stack, // VMRegStackSlots | |
1195 const BasicType *sig_bt, | |
1196 const VMRegPair *regs) { | |
1197 address i2c_entry = __ pc(); | |
1198 | |
1199 AdapterGenerator agen(masm); | |
1200 | |
1201 agen.gen_i2c_adapter(total_args_passed, comp_args_on_stack, sig_bt, regs); | |
1202 | |
1203 | |
1204 // ------------------------------------------------------------------------- | |
1205 // Generate a C2I adapter. On entry we know G5 holds the methodOop. The | |
1206 // args start out packed in the compiled layout. They need to be unpacked | |
1207 // into the interpreter layout. This will almost always require some stack | |
1208 // space. We grow the current (compiled) stack, then repack the args. We | |
1209 // finally end in a jump to the generic interpreter entry point. On exit | |
1210 // from the interpreter, the interpreter will restore our SP (lest the | |
1211 // compiled code, which relys solely on SP and not FP, get sick). | |
1212 | |
1213 address c2i_unverified_entry = __ pc(); | |
1214 Label skip_fixup; | |
1215 { | |
1216 #if !defined(_LP64) && defined(COMPILER2) | |
1217 Register R_temp = L0; // another scratch register | |
1218 #else | |
1219 Register R_temp = G1; // another scratch register | |
1220 #endif | |
1221 | |
1222 Address ic_miss(G3_scratch, SharedRuntime::get_ic_miss_stub()); | |
1223 | |
1224 __ verify_oop(O0); | |
1225 __ verify_oop(G5_method); | |
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1226 __ load_klass(O0, G3_scratch); |
0 | 1227 __ verify_oop(G3_scratch); |
1228 | |
1229 #if !defined(_LP64) && defined(COMPILER2) | |
1230 __ save(SP, -frame::register_save_words*wordSize, SP); | |
1231 __ ld_ptr(G5_method, compiledICHolderOopDesc::holder_klass_offset(), R_temp); | |
1232 __ verify_oop(R_temp); | |
1233 __ cmp(G3_scratch, R_temp); | |
1234 __ restore(); | |
1235 #else | |
1236 __ ld_ptr(G5_method, compiledICHolderOopDesc::holder_klass_offset(), R_temp); | |
1237 __ verify_oop(R_temp); | |
1238 __ cmp(G3_scratch, R_temp); | |
1239 #endif | |
1240 | |
1241 Label ok, ok2; | |
1242 __ brx(Assembler::equal, false, Assembler::pt, ok); | |
1243 __ delayed()->ld_ptr(G5_method, compiledICHolderOopDesc::holder_method_offset(), G5_method); | |
1244 __ jump_to(ic_miss); | |
1245 __ delayed()->nop(); | |
1246 | |
1247 __ bind(ok); | |
1248 // Method might have been compiled since the call site was patched to | |
1249 // interpreted if that is the case treat it as a miss so we can get | |
1250 // the call site corrected. | |
1251 __ ld_ptr(G5_method, in_bytes(methodOopDesc::code_offset()), G3_scratch); | |
1252 __ bind(ok2); | |
1253 __ br_null(G3_scratch, false, __ pt, skip_fixup); | |
1254 __ delayed()->ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), G3_scratch); | |
1255 __ jump_to(ic_miss); | |
1256 __ delayed()->nop(); | |
1257 | |
1258 } | |
1259 | |
1260 address c2i_entry = __ pc(); | |
1261 | |
1262 agen.gen_c2i_adapter(total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup); | |
1263 | |
1264 __ flush(); | |
1265 return new AdapterHandlerEntry(i2c_entry, c2i_entry, c2i_unverified_entry); | |
1266 | |
1267 } | |
1268 | |
1269 // Helper function for native calling conventions | |
1270 static VMReg int_stk_helper( int i ) { | |
1271 // Bias any stack based VMReg we get by ignoring the window area | |
1272 // but not the register parameter save area. | |
1273 // | |
1274 // This is strange for the following reasons. We'd normally expect | |
1275 // the calling convention to return an VMReg for a stack slot | |
1276 // completely ignoring any abi reserved area. C2 thinks of that | |
1277 // abi area as only out_preserve_stack_slots. This does not include | |
1278 // the area allocated by the C abi to store down integer arguments | |
1279 // because the java calling convention does not use it. So | |
1280 // since c2 assumes that there are only out_preserve_stack_slots | |
1281 // to bias the optoregs (which impacts VMRegs) when actually referencing any actual stack | |
1282 // location the c calling convention must add in this bias amount | |
1283 // to make up for the fact that the out_preserve_stack_slots is | |
1284 // insufficient for C calls. What a mess. I sure hope those 6 | |
1285 // stack words were worth it on every java call! | |
1286 | |
1287 // Another way of cleaning this up would be for out_preserve_stack_slots | |
1288 // to take a parameter to say whether it was C or java calling conventions. | |
1289 // Then things might look a little better (but not much). | |
1290 | |
1291 int mem_parm_offset = i - SPARC_ARGS_IN_REGS_NUM; | |
1292 if( mem_parm_offset < 0 ) { | |
1293 return as_oRegister(i)->as_VMReg(); | |
1294 } else { | |
1295 int actual_offset = (mem_parm_offset + frame::memory_parameter_word_sp_offset) * VMRegImpl::slots_per_word; | |
1296 // Now return a biased offset that will be correct when out_preserve_slots is added back in | |
1297 return VMRegImpl::stack2reg(actual_offset - SharedRuntime::out_preserve_stack_slots()); | |
1298 } | |
1299 } | |
1300 | |
1301 | |
1302 int SharedRuntime::c_calling_convention(const BasicType *sig_bt, | |
1303 VMRegPair *regs, | |
1304 int total_args_passed) { | |
1305 | |
1306 // Return the number of VMReg stack_slots needed for the args. | |
1307 // This value does not include an abi space (like register window | |
1308 // save area). | |
1309 | |
1310 // The native convention is V8 if !LP64 | |
1311 // The LP64 convention is the V9 convention which is slightly more sane. | |
1312 | |
1313 // We return the amount of VMReg stack slots we need to reserve for all | |
1314 // the arguments NOT counting out_preserve_stack_slots. Since we always | |
1315 // have space for storing at least 6 registers to memory we start with that. | |
1316 // See int_stk_helper for a further discussion. | |
1317 int max_stack_slots = (frame::varargs_offset * VMRegImpl::slots_per_word) - SharedRuntime::out_preserve_stack_slots(); | |
1318 | |
1319 #ifdef _LP64 | |
1320 // V9 convention: All things "as-if" on double-wide stack slots. | |
1321 // Hoist any int/ptr/long's in the first 6 to int regs. | |
1322 // Hoist any flt/dbl's in the first 16 dbl regs. | |
1323 int j = 0; // Count of actual args, not HALVES | |
1324 for( int i=0; i<total_args_passed; i++, j++ ) { | |
1325 switch( sig_bt[i] ) { | |
1326 case T_BOOLEAN: | |
1327 case T_BYTE: | |
1328 case T_CHAR: | |
1329 case T_INT: | |
1330 case T_SHORT: | |
1331 regs[i].set1( int_stk_helper( j ) ); break; | |
1332 case T_LONG: | |
1333 assert( sig_bt[i+1] == T_VOID, "expecting half" ); | |
1334 case T_ADDRESS: // raw pointers, like current thread, for VM calls | |
1335 case T_ARRAY: | |
1336 case T_OBJECT: | |
1337 regs[i].set2( int_stk_helper( j ) ); | |
1338 break; | |
1339 case T_FLOAT: | |
1340 if ( j < 16 ) { | |
1341 // V9ism: floats go in ODD registers | |
1342 regs[i].set1(as_FloatRegister(1 + (j<<1))->as_VMReg()); | |
1343 } else { | |
1344 // V9ism: floats go in ODD stack slot | |
1345 regs[i].set1(VMRegImpl::stack2reg(1 + (j<<1))); | |
1346 } | |
1347 break; | |
1348 case T_DOUBLE: | |
1349 assert( sig_bt[i+1] == T_VOID, "expecting half" ); | |
1350 if ( j < 16 ) { | |
1351 // V9ism: doubles go in EVEN/ODD regs | |
1352 regs[i].set2(as_FloatRegister(j<<1)->as_VMReg()); | |
1353 } else { | |
1354 // V9ism: doubles go in EVEN/ODD stack slots | |
1355 regs[i].set2(VMRegImpl::stack2reg(j<<1)); | |
1356 } | |
1357 break; | |
1358 case T_VOID: regs[i].set_bad(); j--; break; // Do not count HALVES | |
1359 default: | |
1360 ShouldNotReachHere(); | |
1361 } | |
1362 if (regs[i].first()->is_stack()) { | |
1363 int off = regs[i].first()->reg2stack(); | |
1364 if (off > max_stack_slots) max_stack_slots = off; | |
1365 } | |
1366 if (regs[i].second()->is_stack()) { | |
1367 int off = regs[i].second()->reg2stack(); | |
1368 if (off > max_stack_slots) max_stack_slots = off; | |
1369 } | |
1370 } | |
1371 | |
1372 #else // _LP64 | |
1373 // V8 convention: first 6 things in O-regs, rest on stack. | |
1374 // Alignment is willy-nilly. | |
1375 for( int i=0; i<total_args_passed; i++ ) { | |
1376 switch( sig_bt[i] ) { | |
1377 case T_ADDRESS: // raw pointers, like current thread, for VM calls | |
1378 case T_ARRAY: | |
1379 case T_BOOLEAN: | |
1380 case T_BYTE: | |
1381 case T_CHAR: | |
1382 case T_FLOAT: | |
1383 case T_INT: | |
1384 case T_OBJECT: | |
1385 case T_SHORT: | |
1386 regs[i].set1( int_stk_helper( i ) ); | |
1387 break; | |
1388 case T_DOUBLE: | |
1389 case T_LONG: | |
1390 assert( sig_bt[i+1] == T_VOID, "expecting half" ); | |
1391 regs[i].set_pair( int_stk_helper( i+1 ), int_stk_helper( i ) ); | |
1392 break; | |
1393 case T_VOID: regs[i].set_bad(); break; | |
1394 default: | |
1395 ShouldNotReachHere(); | |
1396 } | |
1397 if (regs[i].first()->is_stack()) { | |
1398 int off = regs[i].first()->reg2stack(); | |
1399 if (off > max_stack_slots) max_stack_slots = off; | |
1400 } | |
1401 if (regs[i].second()->is_stack()) { | |
1402 int off = regs[i].second()->reg2stack(); | |
1403 if (off > max_stack_slots) max_stack_slots = off; | |
1404 } | |
1405 } | |
1406 #endif // _LP64 | |
1407 | |
1408 return round_to(max_stack_slots + 1, 2); | |
1409 | |
1410 } | |
1411 | |
1412 | |
1413 // --------------------------------------------------------------------------- | |
1414 void SharedRuntime::save_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1415 switch (ret_type) { | |
1416 case T_FLOAT: | |
1417 __ stf(FloatRegisterImpl::S, F0, SP, frame_slots*VMRegImpl::stack_slot_size - 4+STACK_BIAS); | |
1418 break; | |
1419 case T_DOUBLE: | |
1420 __ stf(FloatRegisterImpl::D, F0, SP, frame_slots*VMRegImpl::stack_slot_size - 8+STACK_BIAS); | |
1421 break; | |
1422 } | |
1423 } | |
1424 | |
1425 void SharedRuntime::restore_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1426 switch (ret_type) { | |
1427 case T_FLOAT: | |
1428 __ ldf(FloatRegisterImpl::S, SP, frame_slots*VMRegImpl::stack_slot_size - 4+STACK_BIAS, F0); | |
1429 break; | |
1430 case T_DOUBLE: | |
1431 __ ldf(FloatRegisterImpl::D, SP, frame_slots*VMRegImpl::stack_slot_size - 8+STACK_BIAS, F0); | |
1432 break; | |
1433 } | |
1434 } | |
1435 | |
1436 // Check and forward and pending exception. Thread is stored in | |
1437 // L7_thread_cache and possibly NOT in G2_thread. Since this is a native call, there | |
1438 // is no exception handler. We merely pop this frame off and throw the | |
1439 // exception in the caller's frame. | |
1440 static void check_forward_pending_exception(MacroAssembler *masm, Register Rex_oop) { | |
1441 Label L; | |
1442 __ br_null(Rex_oop, false, Assembler::pt, L); | |
1443 __ delayed()->mov(L7_thread_cache, G2_thread); // restore in case we have exception | |
1444 // Since this is a native call, we *know* the proper exception handler | |
1445 // without calling into the VM: it's the empty function. Just pop this | |
1446 // frame and then jump to forward_exception_entry; O7 will contain the | |
1447 // native caller's return PC. | |
1448 Address exception_entry(G3_scratch, StubRoutines::forward_exception_entry()); | |
1449 __ jump_to(exception_entry); | |
1450 __ delayed()->restore(); // Pop this frame off. | |
1451 __ bind(L); | |
1452 } | |
1453 | |
1454 // A simple move of integer like type | |
1455 static void simple_move32(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1456 if (src.first()->is_stack()) { | |
1457 if (dst.first()->is_stack()) { | |
1458 // stack to stack | |
1459 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, L5); | |
1460 __ st(L5, SP, reg2offset(dst.first()) + STACK_BIAS); | |
1461 } else { | |
1462 // stack to reg | |
1463 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
1464 } | |
1465 } else if (dst.first()->is_stack()) { | |
1466 // reg to stack | |
1467 __ st(src.first()->as_Register(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
1468 } else { | |
1469 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
1470 } | |
1471 } | |
1472 | |
1473 // On 64 bit we will store integer like items to the stack as | |
1474 // 64 bits items (sparc abi) even though java would only store | |
1475 // 32bits for a parameter. On 32bit it will simply be 32 bits | |
1476 // So this routine will do 32->32 on 32bit and 32->64 on 64bit | |
1477 static void move32_64(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1478 if (src.first()->is_stack()) { | |
1479 if (dst.first()->is_stack()) { | |
1480 // stack to stack | |
1481 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, L5); | |
1482 __ st_ptr(L5, SP, reg2offset(dst.first()) + STACK_BIAS); | |
1483 } else { | |
1484 // stack to reg | |
1485 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
1486 } | |
1487 } else if (dst.first()->is_stack()) { | |
1488 // reg to stack | |
1489 __ st_ptr(src.first()->as_Register(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
1490 } else { | |
1491 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
1492 } | |
1493 } | |
1494 | |
1495 | |
1496 // An oop arg. Must pass a handle not the oop itself | |
1497 static void object_move(MacroAssembler* masm, | |
1498 OopMap* map, | |
1499 int oop_handle_offset, | |
1500 int framesize_in_slots, | |
1501 VMRegPair src, | |
1502 VMRegPair dst, | |
1503 bool is_receiver, | |
1504 int* receiver_offset) { | |
1505 | |
1506 // must pass a handle. First figure out the location we use as a handle | |
1507 | |
1508 if (src.first()->is_stack()) { | |
1509 // Oop is already on the stack | |
1510 Register rHandle = dst.first()->is_stack() ? L5 : dst.first()->as_Register(); | |
1511 __ add(FP, reg2offset(src.first()) + STACK_BIAS, rHandle); | |
1512 __ ld_ptr(rHandle, 0, L4); | |
1513 #ifdef _LP64 | |
1514 __ movr( Assembler::rc_z, L4, G0, rHandle ); | |
1515 #else | |
1516 __ tst( L4 ); | |
1517 __ movcc( Assembler::zero, false, Assembler::icc, G0, rHandle ); | |
1518 #endif | |
1519 if (dst.first()->is_stack()) { | |
1520 __ st_ptr(rHandle, SP, reg2offset(dst.first()) + STACK_BIAS); | |
1521 } | |
1522 int offset_in_older_frame = src.first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); | |
1523 if (is_receiver) { | |
1524 *receiver_offset = (offset_in_older_frame + framesize_in_slots) * VMRegImpl::stack_slot_size; | |
1525 } | |
1526 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + framesize_in_slots)); | |
1527 } else { | |
1528 // Oop is in an input register pass we must flush it to the stack | |
1529 const Register rOop = src.first()->as_Register(); | |
1530 const Register rHandle = L5; | |
1531 int oop_slot = rOop->input_number() * VMRegImpl::slots_per_word + oop_handle_offset; | |
1532 int offset = oop_slot*VMRegImpl::stack_slot_size; | |
1533 Label skip; | |
1534 __ st_ptr(rOop, SP, offset + STACK_BIAS); | |
1535 if (is_receiver) { | |
1536 *receiver_offset = oop_slot * VMRegImpl::stack_slot_size; | |
1537 } | |
1538 map->set_oop(VMRegImpl::stack2reg(oop_slot)); | |
1539 __ add(SP, offset + STACK_BIAS, rHandle); | |
1540 #ifdef _LP64 | |
1541 __ movr( Assembler::rc_z, rOop, G0, rHandle ); | |
1542 #else | |
1543 __ tst( rOop ); | |
1544 __ movcc( Assembler::zero, false, Assembler::icc, G0, rHandle ); | |
1545 #endif | |
1546 | |
1547 if (dst.first()->is_stack()) { | |
1548 __ st_ptr(rHandle, SP, reg2offset(dst.first()) + STACK_BIAS); | |
1549 } else { | |
1550 __ mov(rHandle, dst.first()->as_Register()); | |
1551 } | |
1552 } | |
1553 } | |
1554 | |
1555 // A float arg may have to do float reg int reg conversion | |
1556 static void float_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1557 assert(!src.second()->is_valid() && !dst.second()->is_valid(), "bad float_move"); | |
1558 | |
1559 if (src.first()->is_stack()) { | |
1560 if (dst.first()->is_stack()) { | |
1561 // stack to stack the easiest of the bunch | |
1562 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, L5); | |
1563 __ st(L5, SP, reg2offset(dst.first()) + STACK_BIAS); | |
1564 } else { | |
1565 // stack to reg | |
1566 if (dst.first()->is_Register()) { | |
1567 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
1568 } else { | |
1569 __ ldf(FloatRegisterImpl::S, FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_FloatRegister()); | |
1570 } | |
1571 } | |
1572 } else if (dst.first()->is_stack()) { | |
1573 // reg to stack | |
1574 if (src.first()->is_Register()) { | |
1575 __ st(src.first()->as_Register(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
1576 } else { | |
1577 __ stf(FloatRegisterImpl::S, src.first()->as_FloatRegister(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
1578 } | |
1579 } else { | |
1580 // reg to reg | |
1581 if (src.first()->is_Register()) { | |
1582 if (dst.first()->is_Register()) { | |
1583 // gpr -> gpr | |
1584 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
1585 } else { | |
1586 // gpr -> fpr | |
1587 __ st(src.first()->as_Register(), FP, -4 + STACK_BIAS); | |
1588 __ ldf(FloatRegisterImpl::S, FP, -4 + STACK_BIAS, dst.first()->as_FloatRegister()); | |
1589 } | |
1590 } else if (dst.first()->is_Register()) { | |
1591 // fpr -> gpr | |
1592 __ stf(FloatRegisterImpl::S, src.first()->as_FloatRegister(), FP, -4 + STACK_BIAS); | |
1593 __ ld(FP, -4 + STACK_BIAS, dst.first()->as_Register()); | |
1594 } else { | |
1595 // fpr -> fpr | |
1596 // In theory these overlap but the ordering is such that this is likely a nop | |
1597 if ( src.first() != dst.first()) { | |
1598 __ fmov(FloatRegisterImpl::S, src.first()->as_FloatRegister(), dst.first()->as_FloatRegister()); | |
1599 } | |
1600 } | |
1601 } | |
1602 } | |
1603 | |
1604 static void split_long_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1605 VMRegPair src_lo(src.first()); | |
1606 VMRegPair src_hi(src.second()); | |
1607 VMRegPair dst_lo(dst.first()); | |
1608 VMRegPair dst_hi(dst.second()); | |
1609 simple_move32(masm, src_lo, dst_lo); | |
1610 simple_move32(masm, src_hi, dst_hi); | |
1611 } | |
1612 | |
1613 // A long move | |
1614 static void long_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1615 | |
1616 // Do the simple ones here else do two int moves | |
1617 if (src.is_single_phys_reg() ) { | |
1618 if (dst.is_single_phys_reg()) { | |
1619 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
1620 } else { | |
1621 // split src into two separate registers | |
1622 // Remember hi means hi address or lsw on sparc | |
1623 // Move msw to lsw | |
1624 if (dst.second()->is_reg()) { | |
1625 // MSW -> MSW | |
1626 __ srax(src.first()->as_Register(), 32, dst.first()->as_Register()); | |
1627 // Now LSW -> LSW | |
1628 // this will only move lo -> lo and ignore hi | |
1629 VMRegPair split(dst.second()); | |
1630 simple_move32(masm, src, split); | |
1631 } else { | |
1632 VMRegPair split(src.first(), L4->as_VMReg()); | |
1633 // MSW -> MSW (lo ie. first word) | |
1634 __ srax(src.first()->as_Register(), 32, L4); | |
1635 split_long_move(masm, split, dst); | |
1636 } | |
1637 } | |
1638 } else if (dst.is_single_phys_reg()) { | |
1639 if (src.is_adjacent_aligned_on_stack(2)) { | |
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1640 __ ld_long(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); |
0 | 1641 } else { |
1642 // dst is a single reg. | |
1643 // Remember lo is low address not msb for stack slots | |
1644 // and lo is the "real" register for registers | |
1645 // src is | |
1646 | |
1647 VMRegPair split; | |
1648 | |
1649 if (src.first()->is_reg()) { | |
1650 // src.lo (msw) is a reg, src.hi is stk/reg | |
1651 // we will move: src.hi (LSW) -> dst.lo, src.lo (MSW) -> src.lo [the MSW is in the LSW of the reg] | |
1652 split.set_pair(dst.first(), src.first()); | |
1653 } else { | |
1654 // msw is stack move to L5 | |
1655 // lsw is stack move to dst.lo (real reg) | |
1656 // we will move: src.hi (LSW) -> dst.lo, src.lo (MSW) -> L5 | |
1657 split.set_pair(dst.first(), L5->as_VMReg()); | |
1658 } | |
1659 | |
1660 // src.lo -> src.lo/L5, src.hi -> dst.lo (the real reg) | |
1661 // msw -> src.lo/L5, lsw -> dst.lo | |
1662 split_long_move(masm, src, split); | |
1663 | |
1664 // So dst now has the low order correct position the | |
1665 // msw half | |
1666 __ sllx(split.first()->as_Register(), 32, L5); | |
1667 | |
1668 const Register d = dst.first()->as_Register(); | |
1669 __ or3(L5, d, d); | |
1670 } | |
1671 } else { | |
1672 // For LP64 we can probably do better. | |
1673 split_long_move(masm, src, dst); | |
1674 } | |
1675 } | |
1676 | |
1677 // A double move | |
1678 static void double_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1679 | |
1680 // The painful thing here is that like long_move a VMRegPair might be | |
1681 // 1: a single physical register | |
1682 // 2: two physical registers (v8) | |
1683 // 3: a physical reg [lo] and a stack slot [hi] (v8) | |
1684 // 4: two stack slots | |
1685 | |
1686 // Since src is always a java calling convention we know that the src pair | |
1687 // is always either all registers or all stack (and aligned?) | |
1688 | |
1689 // in a register [lo] and a stack slot [hi] | |
1690 if (src.first()->is_stack()) { | |
1691 if (dst.first()->is_stack()) { | |
1692 // stack to stack the easiest of the bunch | |
1693 // ought to be a way to do this where if alignment is ok we use ldd/std when possible | |
1694 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, L5); | |
1695 __ ld(FP, reg2offset(src.second()) + STACK_BIAS, L4); | |
1696 __ st(L5, SP, reg2offset(dst.first()) + STACK_BIAS); | |
1697 __ st(L4, SP, reg2offset(dst.second()) + STACK_BIAS); | |
1698 } else { | |
1699 // stack to reg | |
1700 if (dst.second()->is_stack()) { | |
1701 // stack -> reg, stack -> stack | |
1702 __ ld(FP, reg2offset(src.second()) + STACK_BIAS, L4); | |
1703 if (dst.first()->is_Register()) { | |
1704 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
1705 } else { | |
1706 __ ldf(FloatRegisterImpl::S, FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_FloatRegister()); | |
1707 } | |
1708 // This was missing. (very rare case) | |
1709 __ st(L4, SP, reg2offset(dst.second()) + STACK_BIAS); | |
1710 } else { | |
1711 // stack -> reg | |
1712 // Eventually optimize for alignment QQQ | |
1713 if (dst.first()->is_Register()) { | |
1714 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
1715 __ ld(FP, reg2offset(src.second()) + STACK_BIAS, dst.second()->as_Register()); | |
1716 } else { | |
1717 __ ldf(FloatRegisterImpl::S, FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_FloatRegister()); | |
1718 __ ldf(FloatRegisterImpl::S, FP, reg2offset(src.second()) + STACK_BIAS, dst.second()->as_FloatRegister()); | |
1719 } | |
1720 } | |
1721 } | |
1722 } else if (dst.first()->is_stack()) { | |
1723 // reg to stack | |
1724 if (src.first()->is_Register()) { | |
1725 // Eventually optimize for alignment QQQ | |
1726 __ st(src.first()->as_Register(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
1727 if (src.second()->is_stack()) { | |
1728 __ ld(FP, reg2offset(src.second()) + STACK_BIAS, L4); | |
1729 __ st(L4, SP, reg2offset(dst.second()) + STACK_BIAS); | |
1730 } else { | |
1731 __ st(src.second()->as_Register(), SP, reg2offset(dst.second()) + STACK_BIAS); | |
1732 } | |
1733 } else { | |
1734 // fpr to stack | |
1735 if (src.second()->is_stack()) { | |
1736 ShouldNotReachHere(); | |
1737 } else { | |
1738 // Is the stack aligned? | |
1739 if (reg2offset(dst.first()) & 0x7) { | |
1740 // No do as pairs | |
1741 __ stf(FloatRegisterImpl::S, src.first()->as_FloatRegister(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
1742 __ stf(FloatRegisterImpl::S, src.second()->as_FloatRegister(), SP, reg2offset(dst.second()) + STACK_BIAS); | |
1743 } else { | |
1744 __ stf(FloatRegisterImpl::D, src.first()->as_FloatRegister(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
1745 } | |
1746 } | |
1747 } | |
1748 } else { | |
1749 // reg to reg | |
1750 if (src.first()->is_Register()) { | |
1751 if (dst.first()->is_Register()) { | |
1752 // gpr -> gpr | |
1753 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
1754 __ mov(src.second()->as_Register(), dst.second()->as_Register()); | |
1755 } else { | |
1756 // gpr -> fpr | |
1757 // ought to be able to do a single store | |
1758 __ stx(src.first()->as_Register(), FP, -8 + STACK_BIAS); | |
1759 __ stx(src.second()->as_Register(), FP, -4 + STACK_BIAS); | |
1760 // ought to be able to do a single load | |
1761 __ ldf(FloatRegisterImpl::S, FP, -8 + STACK_BIAS, dst.first()->as_FloatRegister()); | |
1762 __ ldf(FloatRegisterImpl::S, FP, -4 + STACK_BIAS, dst.second()->as_FloatRegister()); | |
1763 } | |
1764 } else if (dst.first()->is_Register()) { | |
1765 // fpr -> gpr | |
1766 // ought to be able to do a single store | |
1767 __ stf(FloatRegisterImpl::D, src.first()->as_FloatRegister(), FP, -8 + STACK_BIAS); | |
1768 // ought to be able to do a single load | |
1769 // REMEMBER first() is low address not LSB | |
1770 __ ld(FP, -8 + STACK_BIAS, dst.first()->as_Register()); | |
1771 if (dst.second()->is_Register()) { | |
1772 __ ld(FP, -4 + STACK_BIAS, dst.second()->as_Register()); | |
1773 } else { | |
1774 __ ld(FP, -4 + STACK_BIAS, L4); | |
1775 __ st(L4, SP, reg2offset(dst.second()) + STACK_BIAS); | |
1776 } | |
1777 } else { | |
1778 // fpr -> fpr | |
1779 // In theory these overlap but the ordering is such that this is likely a nop | |
1780 if ( src.first() != dst.first()) { | |
1781 __ fmov(FloatRegisterImpl::D, src.first()->as_FloatRegister(), dst.first()->as_FloatRegister()); | |
1782 } | |
1783 } | |
1784 } | |
1785 } | |
1786 | |
1787 // Creates an inner frame if one hasn't already been created, and | |
1788 // saves a copy of the thread in L7_thread_cache | |
1789 static void create_inner_frame(MacroAssembler* masm, bool* already_created) { | |
1790 if (!*already_created) { | |
1791 __ save_frame(0); | |
1792 // Save thread in L7 (INNER FRAME); it crosses a bunch of VM calls below | |
1793 // Don't use save_thread because it smashes G2 and we merely want to save a | |
1794 // copy | |
1795 __ mov(G2_thread, L7_thread_cache); | |
1796 *already_created = true; | |
1797 } | |
1798 } | |
1799 | |
1800 // --------------------------------------------------------------------------- | |
1801 // Generate a native wrapper for a given method. The method takes arguments | |
1802 // in the Java compiled code convention, marshals them to the native | |
1803 // convention (handlizes oops, etc), transitions to native, makes the call, | |
1804 // returns to java state (possibly blocking), unhandlizes any result and | |
1805 // returns. | |
1806 nmethod *SharedRuntime::generate_native_wrapper(MacroAssembler* masm, | |
1807 methodHandle method, | |
1808 int total_in_args, | |
1809 int comp_args_on_stack, // in VMRegStackSlots | |
1810 BasicType *in_sig_bt, | |
1811 VMRegPair *in_regs, | |
1812 BasicType ret_type) { | |
1813 | |
1814 | |
1815 // Native nmethod wrappers never take possesion of the oop arguments. | |
1816 // So the caller will gc the arguments. The only thing we need an | |
1817 // oopMap for is if the call is static | |
1818 // | |
1819 // An OopMap for lock (and class if static), and one for the VM call itself | |
1820 OopMapSet *oop_maps = new OopMapSet(); | |
1821 intptr_t start = (intptr_t)__ pc(); | |
1822 | |
1823 // First thing make an ic check to see if we should even be here | |
1824 { | |
1825 Label L; | |
1826 const Register temp_reg = G3_scratch; | |
1827 Address ic_miss(temp_reg, SharedRuntime::get_ic_miss_stub()); | |
1828 __ verify_oop(O0); | |
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1829 __ load_klass(O0, temp_reg); |
0 | 1830 __ cmp(temp_reg, G5_inline_cache_reg); |
1831 __ brx(Assembler::equal, true, Assembler::pt, L); | |
1832 __ delayed()->nop(); | |
1833 | |
1834 __ jump_to(ic_miss, 0); | |
1835 __ delayed()->nop(); | |
1836 __ align(CodeEntryAlignment); | |
1837 __ bind(L); | |
1838 } | |
1839 | |
1840 int vep_offset = ((intptr_t)__ pc()) - start; | |
1841 | |
1842 #ifdef COMPILER1 | |
1843 if (InlineObjectHash && method->intrinsic_id() == vmIntrinsics::_hashCode) { | |
1844 // Object.hashCode can pull the hashCode from the header word | |
1845 // instead of doing a full VM transition once it's been computed. | |
1846 // Since hashCode is usually polymorphic at call sites we can't do | |
1847 // this optimization at the call site without a lot of work. | |
1848 Label slowCase; | |
1849 Register receiver = O0; | |
1850 Register result = O0; | |
1851 Register header = G3_scratch; | |
1852 Register hash = G3_scratch; // overwrite header value with hash value | |
1853 Register mask = G1; // to get hash field from header | |
1854 | |
1855 // Read the header and build a mask to get its hash field. Give up if the object is not unlocked. | |
1856 // We depend on hash_mask being at most 32 bits and avoid the use of | |
1857 // hash_mask_in_place because it could be larger than 32 bits in a 64-bit | |
1858 // vm: see markOop.hpp. | |
1859 __ ld_ptr(receiver, oopDesc::mark_offset_in_bytes(), header); | |
1860 __ sethi(markOopDesc::hash_mask, mask); | |
1861 __ btst(markOopDesc::unlocked_value, header); | |
1862 __ br(Assembler::zero, false, Assembler::pn, slowCase); | |
1863 if (UseBiasedLocking) { | |
1864 // Check if biased and fall through to runtime if so | |
1865 __ delayed()->nop(); | |
1866 __ btst(markOopDesc::biased_lock_bit_in_place, header); | |
1867 __ br(Assembler::notZero, false, Assembler::pn, slowCase); | |
1868 } | |
1869 __ delayed()->or3(mask, markOopDesc::hash_mask & 0x3ff, mask); | |
1870 | |
1871 // Check for a valid (non-zero) hash code and get its value. | |
1872 #ifdef _LP64 | |
1873 __ srlx(header, markOopDesc::hash_shift, hash); | |
1874 #else | |
1875 __ srl(header, markOopDesc::hash_shift, hash); | |
1876 #endif | |
1877 __ andcc(hash, mask, hash); | |
1878 __ br(Assembler::equal, false, Assembler::pn, slowCase); | |
1879 __ delayed()->nop(); | |
1880 | |
1881 // leaf return. | |
1882 __ retl(); | |
1883 __ delayed()->mov(hash, result); | |
1884 __ bind(slowCase); | |
1885 } | |
1886 #endif // COMPILER1 | |
1887 | |
1888 | |
1889 // We have received a description of where all the java arg are located | |
1890 // on entry to the wrapper. We need to convert these args to where | |
1891 // the jni function will expect them. To figure out where they go | |
1892 // we convert the java signature to a C signature by inserting | |
1893 // the hidden arguments as arg[0] and possibly arg[1] (static method) | |
1894 | |
1895 int total_c_args = total_in_args + 1; | |
1896 if (method->is_static()) { | |
1897 total_c_args++; | |
1898 } | |
1899 | |
1900 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_c_args); | |
1901 VMRegPair * out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_c_args); | |
1902 | |
1903 int argc = 0; | |
1904 out_sig_bt[argc++] = T_ADDRESS; | |
1905 if (method->is_static()) { | |
1906 out_sig_bt[argc++] = T_OBJECT; | |
1907 } | |
1908 | |
1909 for (int i = 0; i < total_in_args ; i++ ) { | |
1910 out_sig_bt[argc++] = in_sig_bt[i]; | |
1911 } | |
1912 | |
1913 // Now figure out where the args must be stored and how much stack space | |
1914 // they require (neglecting out_preserve_stack_slots but space for storing | |
1915 // the 1st six register arguments). It's weird see int_stk_helper. | |
1916 // | |
1917 int out_arg_slots; | |
1918 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); | |
1919 | |
1920 // Compute framesize for the wrapper. We need to handlize all oops in | |
1921 // registers. We must create space for them here that is disjoint from | |
1922 // the windowed save area because we have no control over when we might | |
1923 // flush the window again and overwrite values that gc has since modified. | |
1924 // (The live window race) | |
1925 // | |
1926 // We always just allocate 6 word for storing down these object. This allow | |
1927 // us to simply record the base and use the Ireg number to decide which | |
1928 // slot to use. (Note that the reg number is the inbound number not the | |
1929 // outbound number). | |
1930 // We must shuffle args to match the native convention, and include var-args space. | |
1931 | |
1932 // Calculate the total number of stack slots we will need. | |
1933 | |
1934 // First count the abi requirement plus all of the outgoing args | |
1935 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; | |
1936 | |
1937 // Now the space for the inbound oop handle area | |
1938 | |
1939 int oop_handle_offset = stack_slots; | |
1940 stack_slots += 6*VMRegImpl::slots_per_word; | |
1941 | |
1942 // Now any space we need for handlizing a klass if static method | |
1943 | |
1944 int oop_temp_slot_offset = 0; | |
1945 int klass_slot_offset = 0; | |
1946 int klass_offset = -1; | |
1947 int lock_slot_offset = 0; | |
1948 bool is_static = false; | |
1949 | |
1950 if (method->is_static()) { | |
1951 klass_slot_offset = stack_slots; | |
1952 stack_slots += VMRegImpl::slots_per_word; | |
1953 klass_offset = klass_slot_offset * VMRegImpl::stack_slot_size; | |
1954 is_static = true; | |
1955 } | |
1956 | |
1957 // Plus a lock if needed | |
1958 | |
1959 if (method->is_synchronized()) { | |
1960 lock_slot_offset = stack_slots; | |
1961 stack_slots += VMRegImpl::slots_per_word; | |
1962 } | |
1963 | |
1964 // Now a place to save return value or as a temporary for any gpr -> fpr moves | |
1965 stack_slots += 2; | |
1966 | |
1967 // Ok The space we have allocated will look like: | |
1968 // | |
1969 // | |
1970 // FP-> | | | |
1971 // |---------------------| | |
1972 // | 2 slots for moves | | |
1973 // |---------------------| | |
1974 // | lock box (if sync) | | |
1975 // |---------------------| <- lock_slot_offset | |
1976 // | klass (if static) | | |
1977 // |---------------------| <- klass_slot_offset | |
1978 // | oopHandle area | | |
1979 // |---------------------| <- oop_handle_offset | |
1980 // | outbound memory | | |
1981 // | based arguments | | |
1982 // | | | |
1983 // |---------------------| | |
1984 // | vararg area | | |
1985 // |---------------------| | |
1986 // | | | |
1987 // SP-> | out_preserved_slots | | |
1988 // | |
1989 // | |
1990 | |
1991 | |
1992 // Now compute actual number of stack words we need rounding to make | |
1993 // stack properly aligned. | |
1994 stack_slots = round_to(stack_slots, 2 * VMRegImpl::slots_per_word); | |
1995 | |
1996 int stack_size = stack_slots * VMRegImpl::stack_slot_size; | |
1997 | |
1998 // Generate stack overflow check before creating frame | |
1999 __ generate_stack_overflow_check(stack_size); | |
2000 | |
2001 // Generate a new frame for the wrapper. | |
2002 __ save(SP, -stack_size, SP); | |
2003 | |
2004 int frame_complete = ((intptr_t)__ pc()) - start; | |
2005 | |
2006 __ verify_thread(); | |
2007 | |
2008 | |
2009 // | |
2010 // We immediately shuffle the arguments so that any vm call we have to | |
2011 // make from here on out (sync slow path, jvmti, etc.) we will have | |
2012 // captured the oops from our caller and have a valid oopMap for | |
2013 // them. | |
2014 | |
2015 // ----------------- | |
2016 // The Grand Shuffle | |
2017 // | |
2018 // Natives require 1 or 2 extra arguments over the normal ones: the JNIEnv* | |
2019 // (derived from JavaThread* which is in L7_thread_cache) and, if static, | |
2020 // the class mirror instead of a receiver. This pretty much guarantees that | |
2021 // register layout will not match. We ignore these extra arguments during | |
2022 // the shuffle. The shuffle is described by the two calling convention | |
2023 // vectors we have in our possession. We simply walk the java vector to | |
2024 // get the source locations and the c vector to get the destinations. | |
2025 // Because we have a new window and the argument registers are completely | |
2026 // disjoint ( I0 -> O1, I1 -> O2, ...) we have nothing to worry about | |
2027 // here. | |
2028 | |
2029 // This is a trick. We double the stack slots so we can claim | |
2030 // the oops in the caller's frame. Since we are sure to have | |
2031 // more args than the caller doubling is enough to make | |
2032 // sure we can capture all the incoming oop args from the | |
2033 // caller. | |
2034 // | |
2035 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); | |
2036 int c_arg = total_c_args - 1; | |
2037 // Record sp-based slot for receiver on stack for non-static methods | |
2038 int receiver_offset = -1; | |
2039 | |
2040 // We move the arguments backward because the floating point registers | |
2041 // destination will always be to a register with a greater or equal register | |
2042 // number or the stack. | |
2043 | |
2044 #ifdef ASSERT | |
2045 bool reg_destroyed[RegisterImpl::number_of_registers]; | |
2046 bool freg_destroyed[FloatRegisterImpl::number_of_registers]; | |
2047 for ( int r = 0 ; r < RegisterImpl::number_of_registers ; r++ ) { | |
2048 reg_destroyed[r] = false; | |
2049 } | |
2050 for ( int f = 0 ; f < FloatRegisterImpl::number_of_registers ; f++ ) { | |
2051 freg_destroyed[f] = false; | |
2052 } | |
2053 | |
2054 #endif /* ASSERT */ | |
2055 | |
2056 for ( int i = total_in_args - 1; i >= 0 ; i--, c_arg-- ) { | |
2057 | |
2058 #ifdef ASSERT | |
2059 if (in_regs[i].first()->is_Register()) { | |
2060 assert(!reg_destroyed[in_regs[i].first()->as_Register()->encoding()], "ack!"); | |
2061 } else if (in_regs[i].first()->is_FloatRegister()) { | |
2062 assert(!freg_destroyed[in_regs[i].first()->as_FloatRegister()->encoding(FloatRegisterImpl::S)], "ack!"); | |
2063 } | |
2064 if (out_regs[c_arg].first()->is_Register()) { | |
2065 reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true; | |
2066 } else if (out_regs[c_arg].first()->is_FloatRegister()) { | |
2067 freg_destroyed[out_regs[c_arg].first()->as_FloatRegister()->encoding(FloatRegisterImpl::S)] = true; | |
2068 } | |
2069 #endif /* ASSERT */ | |
2070 | |
2071 switch (in_sig_bt[i]) { | |
2072 case T_ARRAY: | |
2073 case T_OBJECT: | |
2074 object_move(masm, map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg], | |
2075 ((i == 0) && (!is_static)), | |
2076 &receiver_offset); | |
2077 break; | |
2078 case T_VOID: | |
2079 break; | |
2080 | |
2081 case T_FLOAT: | |
2082 float_move(masm, in_regs[i], out_regs[c_arg]); | |
2083 break; | |
2084 | |
2085 case T_DOUBLE: | |
2086 assert( i + 1 < total_in_args && | |
2087 in_sig_bt[i + 1] == T_VOID && | |
2088 out_sig_bt[c_arg+1] == T_VOID, "bad arg list"); | |
2089 double_move(masm, in_regs[i], out_regs[c_arg]); | |
2090 break; | |
2091 | |
2092 case T_LONG : | |
2093 long_move(masm, in_regs[i], out_regs[c_arg]); | |
2094 break; | |
2095 | |
2096 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); | |
2097 | |
2098 default: | |
2099 move32_64(masm, in_regs[i], out_regs[c_arg]); | |
2100 } | |
2101 } | |
2102 | |
2103 // Pre-load a static method's oop into O1. Used both by locking code and | |
2104 // the normal JNI call code. | |
2105 if (method->is_static()) { | |
2106 __ set_oop_constant(JNIHandles::make_local(Klass::cast(method->method_holder())->java_mirror()), O1); | |
2107 | |
2108 // Now handlize the static class mirror in O1. It's known not-null. | |
2109 __ st_ptr(O1, SP, klass_offset + STACK_BIAS); | |
2110 map->set_oop(VMRegImpl::stack2reg(klass_slot_offset)); | |
2111 __ add(SP, klass_offset + STACK_BIAS, O1); | |
2112 } | |
2113 | |
2114 | |
2115 const Register L6_handle = L6; | |
2116 | |
2117 if (method->is_synchronized()) { | |
2118 __ mov(O1, L6_handle); | |
2119 } | |
2120 | |
2121 // We have all of the arguments setup at this point. We MUST NOT touch any Oregs | |
2122 // except O6/O7. So if we must call out we must push a new frame. We immediately | |
2123 // push a new frame and flush the windows. | |
2124 | |
2125 #ifdef _LP64 | |
2126 intptr_t thepc = (intptr_t) __ pc(); | |
2127 { | |
2128 address here = __ pc(); | |
2129 // Call the next instruction | |
2130 __ call(here + 8, relocInfo::none); | |
2131 __ delayed()->nop(); | |
2132 } | |
2133 #else | |
2134 intptr_t thepc = __ load_pc_address(O7, 0); | |
2135 #endif /* _LP64 */ | |
2136 | |
2137 // We use the same pc/oopMap repeatedly when we call out | |
2138 oop_maps->add_gc_map(thepc - start, map); | |
2139 | |
2140 // O7 now has the pc loaded that we will use when we finally call to native. | |
2141 | |
2142 // Save thread in L7; it crosses a bunch of VM calls below | |
2143 // Don't use save_thread because it smashes G2 and we merely | |
2144 // want to save a copy | |
2145 __ mov(G2_thread, L7_thread_cache); | |
2146 | |
2147 | |
2148 // If we create an inner frame once is plenty | |
2149 // when we create it we must also save G2_thread | |
2150 bool inner_frame_created = false; | |
2151 | |
2152 // dtrace method entry support | |
2153 { | |
2154 SkipIfEqual skip_if( | |
2155 masm, G3_scratch, &DTraceMethodProbes, Assembler::zero); | |
2156 // create inner frame | |
2157 __ save_frame(0); | |
2158 __ mov(G2_thread, L7_thread_cache); | |
2159 __ set_oop_constant(JNIHandles::make_local(method()), O1); | |
2160 __ call_VM_leaf(L7_thread_cache, | |
2161 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
2162 G2_thread, O1); | |
2163 __ restore(); | |
2164 } | |
2165 | |
2166 // We are in the jni frame unless saved_frame is true in which case | |
2167 // we are in one frame deeper (the "inner" frame). If we are in the | |
2168 // "inner" frames the args are in the Iregs and if the jni frame then | |
2169 // they are in the Oregs. | |
2170 // If we ever need to go to the VM (for locking, jvmti) then | |
2171 // we will always be in the "inner" frame. | |
2172 | |
2173 // Lock a synchronized method | |
2174 int lock_offset = -1; // Set if locked | |
2175 if (method->is_synchronized()) { | |
2176 Register Roop = O1; | |
2177 const Register L3_box = L3; | |
2178 | |
2179 create_inner_frame(masm, &inner_frame_created); | |
2180 | |
2181 __ ld_ptr(I1, 0, O1); | |
2182 Label done; | |
2183 | |
2184 lock_offset = (lock_slot_offset * VMRegImpl::stack_slot_size); | |
2185 __ add(FP, lock_offset+STACK_BIAS, L3_box); | |
2186 #ifdef ASSERT | |
2187 if (UseBiasedLocking) { | |
2188 // making the box point to itself will make it clear it went unused | |
2189 // but also be obviously invalid | |
2190 __ st_ptr(L3_box, L3_box, 0); | |
2191 } | |
2192 #endif // ASSERT | |
2193 // | |
2194 // Compiler_lock_object (Roop, Rmark, Rbox, Rscratch) -- kills Rmark, Rbox, Rscratch | |
2195 // | |
2196 __ compiler_lock_object(Roop, L1, L3_box, L2); | |
2197 __ br(Assembler::equal, false, Assembler::pt, done); | |
2198 __ delayed() -> add(FP, lock_offset+STACK_BIAS, L3_box); | |
2199 | |
2200 | |
2201 // None of the above fast optimizations worked so we have to get into the | |
2202 // slow case of monitor enter. Inline a special case of call_VM that | |
2203 // disallows any pending_exception. | |
2204 __ mov(Roop, O0); // Need oop in O0 | |
2205 __ mov(L3_box, O1); | |
2206 | |
2207 // Record last_Java_sp, in case the VM code releases the JVM lock. | |
2208 | |
2209 __ set_last_Java_frame(FP, I7); | |
2210 | |
2211 // do the call | |
2212 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_locking_C), relocInfo::runtime_call_type); | |
2213 __ delayed()->mov(L7_thread_cache, O2); | |
2214 | |
2215 __ restore_thread(L7_thread_cache); // restore G2_thread | |
2216 __ reset_last_Java_frame(); | |
2217 | |
2218 #ifdef ASSERT | |
2219 { Label L; | |
2220 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), O0); | |
2221 __ br_null(O0, false, Assembler::pt, L); | |
2222 __ delayed()->nop(); | |
2223 __ stop("no pending exception allowed on exit from IR::monitorenter"); | |
2224 __ bind(L); | |
2225 } | |
2226 #endif | |
2227 __ bind(done); | |
2228 } | |
2229 | |
2230 | |
2231 // Finally just about ready to make the JNI call | |
2232 | |
2233 __ flush_windows(); | |
2234 if (inner_frame_created) { | |
2235 __ restore(); | |
2236 } else { | |
2237 // Store only what we need from this frame | |
2238 // QQQ I think that non-v9 (like we care) we don't need these saves | |
2239 // either as the flush traps and the current window goes too. | |
2240 __ st_ptr(FP, SP, FP->sp_offset_in_saved_window()*wordSize + STACK_BIAS); | |
2241 __ st_ptr(I7, SP, I7->sp_offset_in_saved_window()*wordSize + STACK_BIAS); | |
2242 } | |
2243 | |
2244 // get JNIEnv* which is first argument to native | |
2245 | |
2246 __ add(G2_thread, in_bytes(JavaThread::jni_environment_offset()), O0); | |
2247 | |
2248 // Use that pc we placed in O7 a while back as the current frame anchor | |
2249 | |
2250 __ set_last_Java_frame(SP, O7); | |
2251 | |
2252 // Transition from _thread_in_Java to _thread_in_native. | |
2253 __ set(_thread_in_native, G3_scratch); | |
2254 __ st(G3_scratch, G2_thread, in_bytes(JavaThread::thread_state_offset())); | |
2255 | |
2256 // We flushed the windows ages ago now mark them as flushed | |
2257 | |
2258 // mark windows as flushed | |
2259 __ set(JavaFrameAnchor::flushed, G3_scratch); | |
2260 | |
2261 Address flags(G2_thread, | |
2262 0, | |
2263 in_bytes(JavaThread::frame_anchor_offset()) + in_bytes(JavaFrameAnchor::flags_offset())); | |
2264 | |
2265 #ifdef _LP64 | |
2266 Address dest(O7, method->native_function()); | |
2267 __ relocate(relocInfo::runtime_call_type); | |
2268 __ jumpl_to(dest, O7); | |
2269 #else | |
2270 __ call(method->native_function(), relocInfo::runtime_call_type); | |
2271 #endif | |
2272 __ delayed()->st(G3_scratch, flags); | |
2273 | |
2274 __ restore_thread(L7_thread_cache); // restore G2_thread | |
2275 | |
2276 // Unpack native results. For int-types, we do any needed sign-extension | |
2277 // and move things into I0. The return value there will survive any VM | |
2278 // calls for blocking or unlocking. An FP or OOP result (handle) is done | |
2279 // specially in the slow-path code. | |
2280 switch (ret_type) { | |
2281 case T_VOID: break; // Nothing to do! | |
2282 case T_FLOAT: break; // Got it where we want it (unless slow-path) | |
2283 case T_DOUBLE: break; // Got it where we want it (unless slow-path) | |
2284 // In 64 bits build result is in O0, in O0, O1 in 32bit build | |
2285 case T_LONG: | |
2286 #ifndef _LP64 | |
2287 __ mov(O1, I1); | |
2288 #endif | |
2289 // Fall thru | |
2290 case T_OBJECT: // Really a handle | |
2291 case T_ARRAY: | |
2292 case T_INT: | |
2293 __ mov(O0, I0); | |
2294 break; | |
2295 case T_BOOLEAN: __ subcc(G0, O0, G0); __ addc(G0, 0, I0); break; // !0 => true; 0 => false | |
2296 case T_BYTE : __ sll(O0, 24, O0); __ sra(O0, 24, I0); break; | |
2297 case T_CHAR : __ sll(O0, 16, O0); __ srl(O0, 16, I0); break; // cannot use and3, 0xFFFF too big as immediate value! | |
2298 case T_SHORT : __ sll(O0, 16, O0); __ sra(O0, 16, I0); break; | |
2299 break; // Cannot de-handlize until after reclaiming jvm_lock | |
2300 default: | |
2301 ShouldNotReachHere(); | |
2302 } | |
2303 | |
2304 // must we block? | |
2305 | |
2306 // Block, if necessary, before resuming in _thread_in_Java state. | |
2307 // In order for GC to work, don't clear the last_Java_sp until after blocking. | |
2308 { Label no_block; | |
2309 Address sync_state(G3_scratch, SafepointSynchronize::address_of_state()); | |
2310 | |
2311 // Switch thread to "native transition" state before reading the synchronization state. | |
2312 // This additional state is necessary because reading and testing the synchronization | |
2313 // state is not atomic w.r.t. GC, as this scenario demonstrates: | |
2314 // Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted. | |
2315 // VM thread changes sync state to synchronizing and suspends threads for GC. | |
2316 // Thread A is resumed to finish this native method, but doesn't block here since it | |
2317 // didn't see any synchronization is progress, and escapes. | |
2318 __ set(_thread_in_native_trans, G3_scratch); | |
2319 __ st(G3_scratch, G2_thread, in_bytes(JavaThread::thread_state_offset())); | |
2320 if(os::is_MP()) { | |
2321 if (UseMembar) { | |
2322 // Force this write out before the read below | |
2323 __ membar(Assembler::StoreLoad); | |
2324 } else { | |
2325 // Write serialization page so VM thread can do a pseudo remote membar. | |
2326 // We use the current thread pointer to calculate a thread specific | |
2327 // offset to write to within the page. This minimizes bus traffic | |
2328 // due to cache line collision. | |
2329 __ serialize_memory(G2_thread, G1_scratch, G3_scratch); | |
2330 } | |
2331 } | |
2332 __ load_contents(sync_state, G3_scratch); | |
2333 __ cmp(G3_scratch, SafepointSynchronize::_not_synchronized); | |
2334 | |
2335 Label L; | |
2336 Address suspend_state(G2_thread, 0, in_bytes(JavaThread::suspend_flags_offset())); | |
2337 __ br(Assembler::notEqual, false, Assembler::pn, L); | |
2338 __ delayed()-> | |
2339 ld(suspend_state, G3_scratch); | |
2340 __ cmp(G3_scratch, 0); | |
2341 __ br(Assembler::equal, false, Assembler::pt, no_block); | |
2342 __ delayed()->nop(); | |
2343 __ bind(L); | |
2344 | |
2345 // Block. Save any potential method result value before the operation and | |
2346 // use a leaf call to leave the last_Java_frame setup undisturbed. Doing this | |
2347 // lets us share the oopMap we used when we went native rather the create | |
2348 // a distinct one for this pc | |
2349 // | |
2350 save_native_result(masm, ret_type, stack_slots); | |
2351 __ call_VM_leaf(L7_thread_cache, | |
2352 CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans), | |
2353 G2_thread); | |
2354 | |
2355 // Restore any method result value | |
2356 restore_native_result(masm, ret_type, stack_slots); | |
2357 __ bind(no_block); | |
2358 } | |
2359 | |
2360 // thread state is thread_in_native_trans. Any safepoint blocking has already | |
2361 // happened so we can now change state to _thread_in_Java. | |
2362 | |
2363 | |
2364 __ set(_thread_in_Java, G3_scratch); | |
2365 __ st(G3_scratch, G2_thread, in_bytes(JavaThread::thread_state_offset())); | |
2366 | |
2367 | |
2368 Label no_reguard; | |
2369 __ ld(G2_thread, in_bytes(JavaThread::stack_guard_state_offset()), G3_scratch); | |
2370 __ cmp(G3_scratch, JavaThread::stack_guard_yellow_disabled); | |
2371 __ br(Assembler::notEqual, false, Assembler::pt, no_reguard); | |
2372 __ delayed()->nop(); | |
2373 | |
2374 save_native_result(masm, ret_type, stack_slots); | |
2375 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)); | |
2376 __ delayed()->nop(); | |
2377 | |
2378 __ restore_thread(L7_thread_cache); // restore G2_thread | |
2379 restore_native_result(masm, ret_type, stack_slots); | |
2380 | |
2381 __ bind(no_reguard); | |
2382 | |
2383 // Handle possible exception (will unlock if necessary) | |
2384 | |
2385 // native result if any is live in freg or I0 (and I1 if long and 32bit vm) | |
2386 | |
2387 // Unlock | |
2388 if (method->is_synchronized()) { | |
2389 Label done; | |
2390 Register I2_ex_oop = I2; | |
2391 const Register L3_box = L3; | |
2392 // Get locked oop from the handle we passed to jni | |
2393 __ ld_ptr(L6_handle, 0, L4); | |
2394 __ add(SP, lock_offset+STACK_BIAS, L3_box); | |
2395 // Must save pending exception around the slow-path VM call. Since it's a | |
2396 // leaf call, the pending exception (if any) can be kept in a register. | |
2397 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), I2_ex_oop); | |
2398 // Now unlock | |
2399 // (Roop, Rmark, Rbox, Rscratch) | |
2400 __ compiler_unlock_object(L4, L1, L3_box, L2); | |
2401 __ br(Assembler::equal, false, Assembler::pt, done); | |
2402 __ delayed()-> add(SP, lock_offset+STACK_BIAS, L3_box); | |
2403 | |
2404 // save and restore any potential method result value around the unlocking | |
2405 // operation. Will save in I0 (or stack for FP returns). | |
2406 save_native_result(masm, ret_type, stack_slots); | |
2407 | |
2408 // Must clear pending-exception before re-entering the VM. Since this is | |
2409 // a leaf call, pending-exception-oop can be safely kept in a register. | |
2410 __ st_ptr(G0, G2_thread, in_bytes(Thread::pending_exception_offset())); | |
2411 | |
2412 // slow case of monitor enter. Inline a special case of call_VM that | |
2413 // disallows any pending_exception. | |
2414 __ mov(L3_box, O1); | |
2415 | |
2416 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_unlocking_C), relocInfo::runtime_call_type); | |
2417 __ delayed()->mov(L4, O0); // Need oop in O0 | |
2418 | |
2419 __ restore_thread(L7_thread_cache); // restore G2_thread | |
2420 | |
2421 #ifdef ASSERT | |
2422 { Label L; | |
2423 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), O0); | |
2424 __ br_null(O0, false, Assembler::pt, L); | |
2425 __ delayed()->nop(); | |
2426 __ stop("no pending exception allowed on exit from IR::monitorexit"); | |
2427 __ bind(L); | |
2428 } | |
2429 #endif | |
2430 restore_native_result(masm, ret_type, stack_slots); | |
2431 // check_forward_pending_exception jump to forward_exception if any pending | |
2432 // exception is set. The forward_exception routine expects to see the | |
2433 // exception in pending_exception and not in a register. Kind of clumsy, | |
2434 // since all folks who branch to forward_exception must have tested | |
2435 // pending_exception first and hence have it in a register already. | |
2436 __ st_ptr(I2_ex_oop, G2_thread, in_bytes(Thread::pending_exception_offset())); | |
2437 __ bind(done); | |
2438 } | |
2439 | |
2440 // Tell dtrace about this method exit | |
2441 { | |
2442 SkipIfEqual skip_if( | |
2443 masm, G3_scratch, &DTraceMethodProbes, Assembler::zero); | |
2444 save_native_result(masm, ret_type, stack_slots); | |
2445 __ set_oop_constant(JNIHandles::make_local(method()), O1); | |
2446 __ call_VM_leaf(L7_thread_cache, | |
2447 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
2448 G2_thread, O1); | |
2449 restore_native_result(masm, ret_type, stack_slots); | |
2450 } | |
2451 | |
2452 // Clear "last Java frame" SP and PC. | |
2453 __ verify_thread(); // G2_thread must be correct | |
2454 __ reset_last_Java_frame(); | |
2455 | |
2456 // Unpack oop result | |
2457 if (ret_type == T_OBJECT || ret_type == T_ARRAY) { | |
2458 Label L; | |
2459 __ addcc(G0, I0, G0); | |
2460 __ brx(Assembler::notZero, true, Assembler::pt, L); | |
2461 __ delayed()->ld_ptr(I0, 0, I0); | |
2462 __ mov(G0, I0); | |
2463 __ bind(L); | |
2464 __ verify_oop(I0); | |
2465 } | |
2466 | |
2467 // reset handle block | |
2468 __ ld_ptr(G2_thread, in_bytes(JavaThread::active_handles_offset()), L5); | |
2469 __ st_ptr(G0, L5, JNIHandleBlock::top_offset_in_bytes()); | |
2470 | |
2471 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), G3_scratch); | |
2472 check_forward_pending_exception(masm, G3_scratch); | |
2473 | |
2474 | |
2475 // Return | |
2476 | |
2477 #ifndef _LP64 | |
2478 if (ret_type == T_LONG) { | |
2479 | |
2480 // Must leave proper result in O0,O1 and G1 (c2/tiered only) | |
2481 __ sllx(I0, 32, G1); // Shift bits into high G1 | |
2482 __ srl (I1, 0, I1); // Zero extend O1 (harmless?) | |
2483 __ or3 (I1, G1, G1); // OR 64 bits into G1 | |
2484 } | |
2485 #endif | |
2486 | |
2487 __ ret(); | |
2488 __ delayed()->restore(); | |
2489 | |
2490 __ flush(); | |
2491 | |
2492 nmethod *nm = nmethod::new_native_nmethod(method, | |
2493 masm->code(), | |
2494 vep_offset, | |
2495 frame_complete, | |
2496 stack_slots / VMRegImpl::slots_per_word, | |
2497 (is_static ? in_ByteSize(klass_offset) : in_ByteSize(receiver_offset)), | |
2498 in_ByteSize(lock_offset), | |
2499 oop_maps); | |
2500 return nm; | |
2501 | |
2502 } | |
2503 | |
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2504 #ifdef HAVE_DTRACE_H |
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2505 // --------------------------------------------------------------------------- |
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2506 // Generate a dtrace nmethod for a given signature. The method takes arguments |
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2507 // in the Java compiled code convention, marshals them to the native |
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2508 // abi and then leaves nops at the position you would expect to call a native |
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2509 // function. When the probe is enabled the nops are replaced with a trap |
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2510 // instruction that dtrace inserts and the trace will cause a notification |
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2511 // to dtrace. |
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2512 // |
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2513 // The probes are only able to take primitive types and java/lang/String as |
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2514 // arguments. No other java types are allowed. Strings are converted to utf8 |
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2515 // strings so that from dtrace point of view java strings are converted to C |
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2516 // strings. There is an arbitrary fixed limit on the total space that a method |
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2517 // can use for converting the strings. (256 chars per string in the signature). |
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2518 // So any java string larger then this is truncated. |
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2519 |
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2520 static int fp_offset[ConcreteRegisterImpl::number_of_registers] = { 0 }; |
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2521 static bool offsets_initialized = false; |
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2522 |
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2523 static VMRegPair reg64_to_VMRegPair(Register r) { |
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2524 VMRegPair ret; |
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2525 if (wordSize == 8) { |
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2526 ret.set2(r->as_VMReg()); |
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2527 } else { |
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2528 ret.set_pair(r->successor()->as_VMReg(), r->as_VMReg()); |
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2529 } |
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2530 return ret; |
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2531 } |
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2532 |
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2533 |
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2534 nmethod *SharedRuntime::generate_dtrace_nmethod( |
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2535 MacroAssembler *masm, methodHandle method) { |
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2536 |
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2537 |
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2538 // generate_dtrace_nmethod is guarded by a mutex so we are sure to |
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2539 // be single threaded in this method. |
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2540 assert(AdapterHandlerLibrary_lock->owned_by_self(), "must be"); |
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2541 |
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2542 // Fill in the signature array, for the calling-convention call. |
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2543 int total_args_passed = method->size_of_parameters(); |
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2544 |
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2545 BasicType* in_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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2546 VMRegPair *in_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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2547 |
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2548 // The signature we are going to use for the trap that dtrace will see |
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2549 // java/lang/String is converted. We drop "this" and any other object |
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2550 // is converted to NULL. (A one-slot java/lang/Long object reference |
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2551 // is converted to a two-slot long, which is why we double the allocation). |
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2552 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed * 2); |
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2553 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed * 2); |
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2554 |
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2555 int i=0; |
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2556 int total_strings = 0; |
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2557 int first_arg_to_pass = 0; |
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2558 int total_c_args = 0; |
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2559 int box_offset = java_lang_boxing_object::value_offset_in_bytes(); |
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2560 |
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2561 // Skip the receiver as dtrace doesn't want to see it |
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2562 if( !method->is_static() ) { |
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2563 in_sig_bt[i++] = T_OBJECT; |
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2564 first_arg_to_pass = 1; |
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2565 } |
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2566 |
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2567 SignatureStream ss(method->signature()); |
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2568 for ( ; !ss.at_return_type(); ss.next()) { |
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2569 BasicType bt = ss.type(); |
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2570 in_sig_bt[i++] = bt; // Collect remaining bits of signature |
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2571 out_sig_bt[total_c_args++] = bt; |
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2572 if( bt == T_OBJECT) { |
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2573 symbolOop s = ss.as_symbol_or_null(); |
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2574 if (s == vmSymbols::java_lang_String()) { |
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2575 total_strings++; |
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2576 out_sig_bt[total_c_args-1] = T_ADDRESS; |
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2577 } else if (s == vmSymbols::java_lang_Boolean() || |
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2578 s == vmSymbols::java_lang_Byte()) { |
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2579 out_sig_bt[total_c_args-1] = T_BYTE; |
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2580 } else if (s == vmSymbols::java_lang_Character() || |
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2581 s == vmSymbols::java_lang_Short()) { |
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2582 out_sig_bt[total_c_args-1] = T_SHORT; |
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2583 } else if (s == vmSymbols::java_lang_Integer() || |
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2584 s == vmSymbols::java_lang_Float()) { |
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2585 out_sig_bt[total_c_args-1] = T_INT; |
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2586 } else if (s == vmSymbols::java_lang_Long() || |
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2587 s == vmSymbols::java_lang_Double()) { |
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2588 out_sig_bt[total_c_args-1] = T_LONG; |
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2589 out_sig_bt[total_c_args++] = T_VOID; |
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2590 } |
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2591 } else if ( bt == T_LONG || bt == T_DOUBLE ) { |
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2592 in_sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2593 // We convert double to long |
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2594 out_sig_bt[total_c_args-1] = T_LONG; |
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2595 out_sig_bt[total_c_args++] = T_VOID; |
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2596 } else if ( bt == T_FLOAT) { |
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2597 // We convert float to int |
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2598 out_sig_bt[total_c_args-1] = T_INT; |
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2599 } |
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2600 } |
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2601 |
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2602 assert(i==total_args_passed, "validly parsed signature"); |
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2603 |
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2604 // Now get the compiled-Java layout as input arguments |
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2605 int comp_args_on_stack; |
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2606 comp_args_on_stack = SharedRuntime::java_calling_convention( |
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2607 in_sig_bt, in_regs, total_args_passed, false); |
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2608 |
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2609 // We have received a description of where all the java arg are located |
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2610 // on entry to the wrapper. We need to convert these args to where |
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2611 // the a native (non-jni) function would expect them. To figure out |
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2612 // where they go we convert the java signature to a C signature and remove |
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2613 // T_VOID for any long/double we might have received. |
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2614 |
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2615 |
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2616 // Now figure out where the args must be stored and how much stack space |
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2617 // they require (neglecting out_preserve_stack_slots but space for storing |
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2618 // the 1st six register arguments). It's weird see int_stk_helper. |
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2619 // |
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2620 int out_arg_slots; |
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2621 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); |
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2622 |
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2623 // Calculate the total number of stack slots we will need. |
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2624 |
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2625 // First count the abi requirement plus all of the outgoing args |
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2626 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; |
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2627 |
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2628 // Plus a temp for possible converion of float/double/long register args |
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2629 |
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2630 int conversion_temp = stack_slots; |
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2631 stack_slots += 2; |
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2632 |
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2633 |
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2634 // Now space for the string(s) we must convert |
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2635 |
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2636 int string_locs = stack_slots; |
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2637 stack_slots += total_strings * |
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2638 (max_dtrace_string_size / VMRegImpl::stack_slot_size); |
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2639 |
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2640 // Ok The space we have allocated will look like: |
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2641 // |
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2642 // |
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2643 // FP-> | | |
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2644 // |---------------------| |
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2645 // | string[n] | |
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2646 // |---------------------| <- string_locs[n] |
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2647 // | string[n-1] | |
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2648 // |---------------------| <- string_locs[n-1] |
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2649 // | ... | |
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2650 // | ... | |
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2651 // |---------------------| <- string_locs[1] |
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2652 // | string[0] | |
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2653 // |---------------------| <- string_locs[0] |
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2654 // | temp | |
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2655 // |---------------------| <- conversion_temp |
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2656 // | outbound memory | |
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2657 // | based arguments | |
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2658 // | | |
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2659 // |---------------------| |
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2660 // | | |
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2661 // SP-> | out_preserved_slots | |
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2662 // |
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2663 // |
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2664 |
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2665 // Now compute actual number of stack words we need rounding to make |
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2666 // stack properly aligned. |
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2667 stack_slots = round_to(stack_slots, 4 * VMRegImpl::slots_per_word); |
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2668 |
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2669 int stack_size = stack_slots * VMRegImpl::stack_slot_size; |
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2670 |
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2671 intptr_t start = (intptr_t)__ pc(); |
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2672 |
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2673 // First thing make an ic check to see if we should even be here |
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2674 |
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2675 { |
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2676 Label L; |
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2677 const Register temp_reg = G3_scratch; |
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2678 Address ic_miss(temp_reg, SharedRuntime::get_ic_miss_stub()); |
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2679 __ verify_oop(O0); |
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2680 __ ld_ptr(O0, oopDesc::klass_offset_in_bytes(), temp_reg); |
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2681 __ cmp(temp_reg, G5_inline_cache_reg); |
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2682 __ brx(Assembler::equal, true, Assembler::pt, L); |
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2683 __ delayed()->nop(); |
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2684 |
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2685 __ jump_to(ic_miss, 0); |
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2686 __ delayed()->nop(); |
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2687 __ align(CodeEntryAlignment); |
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2688 __ bind(L); |
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2689 } |
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2690 |
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2691 int vep_offset = ((intptr_t)__ pc()) - start; |
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2692 |
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2693 |
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2694 // The instruction at the verified entry point must be 5 bytes or longer |
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2695 // because it can be patched on the fly by make_non_entrant. The stack bang |
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2696 // instruction fits that requirement. |
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2697 |
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2698 // Generate stack overflow check before creating frame |
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2699 __ generate_stack_overflow_check(stack_size); |
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2700 |
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2701 assert(((intptr_t)__ pc() - start - vep_offset) >= 5, |
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2702 "valid size for make_non_entrant"); |
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2703 |
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2704 // Generate a new frame for the wrapper. |
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2705 __ save(SP, -stack_size, SP); |
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2706 |
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2707 // Frame is now completed as far a size and linkage. |
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2708 |
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2709 int frame_complete = ((intptr_t)__ pc()) - start; |
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2710 |
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2711 #ifdef ASSERT |
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2712 bool reg_destroyed[RegisterImpl::number_of_registers]; |
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2713 bool freg_destroyed[FloatRegisterImpl::number_of_registers]; |
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2714 for ( int r = 0 ; r < RegisterImpl::number_of_registers ; r++ ) { |
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2715 reg_destroyed[r] = false; |
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2716 } |
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2717 for ( int f = 0 ; f < FloatRegisterImpl::number_of_registers ; f++ ) { |
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2718 freg_destroyed[f] = false; |
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2719 } |
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2720 |
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2721 #endif /* ASSERT */ |
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2722 |
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2723 VMRegPair zero; |
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2724 zero.set2(G0->as_VMReg()); |
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2725 |
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2726 int c_arg, j_arg; |
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2727 |
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2728 Register conversion_off = noreg; |
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2729 |
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2730 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2731 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2732 |
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2733 VMRegPair src = in_regs[j_arg]; |
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2734 VMRegPair dst = out_regs[c_arg]; |
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2735 |
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2736 #ifdef ASSERT |
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2737 if (src.first()->is_Register()) { |
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2738 assert(!reg_destroyed[src.first()->as_Register()->encoding()], "ack!"); |
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2739 } else if (src.first()->is_FloatRegister()) { |
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2740 assert(!freg_destroyed[src.first()->as_FloatRegister()->encoding( |
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2741 FloatRegisterImpl::S)], "ack!"); |
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2742 } |
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2743 if (dst.first()->is_Register()) { |
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2744 reg_destroyed[dst.first()->as_Register()->encoding()] = true; |
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2745 } else if (dst.first()->is_FloatRegister()) { |
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2746 freg_destroyed[dst.first()->as_FloatRegister()->encoding( |
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2747 FloatRegisterImpl::S)] = true; |
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2748 } |
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2749 #endif /* ASSERT */ |
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2750 |
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2751 switch (in_sig_bt[j_arg]) { |
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2752 case T_ARRAY: |
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2753 case T_OBJECT: |
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2754 { |
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2755 if (out_sig_bt[c_arg] == T_BYTE || out_sig_bt[c_arg] == T_SHORT || |
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2756 out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
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2757 // need to unbox a one-slot value |
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2758 Register in_reg = L0; |
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2759 Register tmp = L2; |
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2760 if ( src.first()->is_reg() ) { |
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2761 in_reg = src.first()->as_Register(); |
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2762 } else { |
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2763 assert(Assembler::is_simm13(reg2offset(src.first()) + STACK_BIAS), |
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2764 "must be"); |
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2765 __ ld_ptr(FP, reg2offset(src.first()) + STACK_BIAS, in_reg); |
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2766 } |
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2767 // If the final destination is an acceptable register |
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2768 if ( dst.first()->is_reg() ) { |
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2769 if ( dst.is_single_phys_reg() || out_sig_bt[c_arg] != T_LONG ) { |
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2770 tmp = dst.first()->as_Register(); |
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2771 } |
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|
2772 } |
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|
2773 |
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2774 Label skipUnbox; |
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2775 if ( wordSize == 4 && out_sig_bt[c_arg] == T_LONG ) { |
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2776 __ mov(G0, tmp->successor()); |
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2777 } |
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2778 __ br_null(in_reg, true, Assembler::pn, skipUnbox); |
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2779 __ delayed()->mov(G0, tmp); |
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2780 |
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2781 switch (out_sig_bt[c_arg]) { |
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2782 case T_BYTE: |
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2783 __ ldub(in_reg, box_offset, tmp); break; |
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2784 case T_SHORT: |
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2785 __ lduh(in_reg, box_offset, tmp); break; |
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2786 case T_INT: |
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2787 __ ld(in_reg, box_offset, tmp); break; |
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2788 case T_LONG: |
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2789 __ ld_long(in_reg, box_offset, tmp); break; |
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2790 default: ShouldNotReachHere(); |
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2791 } |
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|
2792 |
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2793 __ bind(skipUnbox); |
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2794 // If tmp wasn't final destination copy to final destination |
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2795 if (tmp == L2) { |
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2796 VMRegPair tmp_as_VM = reg64_to_VMRegPair(L2); |
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2797 if (out_sig_bt[c_arg] == T_LONG) { |
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2798 long_move(masm, tmp_as_VM, dst); |
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2799 } else { |
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2800 move32_64(masm, tmp_as_VM, out_regs[c_arg]); |
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2801 } |
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|
2802 } |
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2803 if (out_sig_bt[c_arg] == T_LONG) { |
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2804 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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2805 ++c_arg; // move over the T_VOID to keep the loop indices in sync |
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2806 } |
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2807 } else if (out_sig_bt[c_arg] == T_ADDRESS) { |
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2808 Register s = |
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2809 src.first()->is_reg() ? src.first()->as_Register() : L2; |
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2810 Register d = |
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2811 dst.first()->is_reg() ? dst.first()->as_Register() : L2; |
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2812 |
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2813 // We store the oop now so that the conversion pass can reach |
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2814 // while in the inner frame. This will be the only store if |
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2815 // the oop is NULL. |
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2816 if (s != L2) { |
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2817 // src is register |
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2818 if (d != L2) { |
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2819 // dst is register |
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2820 __ mov(s, d); |
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2821 } else { |
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2822 assert(Assembler::is_simm13(reg2offset(dst.first()) + |
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2823 STACK_BIAS), "must be"); |
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2824 __ st_ptr(s, SP, reg2offset(dst.first()) + STACK_BIAS); |
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2825 } |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2826 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2827 // src not a register |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2828 assert(Assembler::is_simm13(reg2offset(src.first()) + |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2829 STACK_BIAS), "must be"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2830 __ ld_ptr(FP, reg2offset(src.first()) + STACK_BIAS, d); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2831 if (d == L2) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2832 assert(Assembler::is_simm13(reg2offset(dst.first()) + |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2833 STACK_BIAS), "must be"); |
018d5b58dd4f
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kamg
parents:
113
diff
changeset
|
2834 __ st_ptr(d, SP, reg2offset(dst.first()) + STACK_BIAS); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2835 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2836 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2837 } else if (out_sig_bt[c_arg] != T_VOID) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2838 // Convert the arg to NULL |
018d5b58dd4f
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kamg
parents:
113
diff
changeset
|
2839 if (dst.first()->is_reg()) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2840 __ mov(G0, dst.first()->as_Register()); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2841 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2842 assert(Assembler::is_simm13(reg2offset(dst.first()) + |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2843 STACK_BIAS), "must be"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2844 __ st_ptr(G0, SP, reg2offset(dst.first()) + STACK_BIAS); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2845 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2846 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2847 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2848 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2849 case T_VOID: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2850 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2851 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2852 case T_FLOAT: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2853 if (src.first()->is_stack()) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2854 // Stack to stack/reg is simple |
018d5b58dd4f
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kamg
parents:
113
diff
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|
2855 move32_64(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2856 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2857 if (dst.first()->is_reg()) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2858 // freg -> reg |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2859 int off = |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2860 STACK_BIAS + conversion_temp * VMRegImpl::stack_slot_size; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2861 Register d = dst.first()->as_Register(); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2862 if (Assembler::is_simm13(off)) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2863 __ stf(FloatRegisterImpl::S, src.first()->as_FloatRegister(), |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2864 SP, off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2865 __ ld(SP, off, d); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2866 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2867 if (conversion_off == noreg) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2868 __ set(off, L6); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2869 conversion_off = L6; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2870 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2871 __ stf(FloatRegisterImpl::S, src.first()->as_FloatRegister(), |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2872 SP, conversion_off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2873 __ ld(SP, conversion_off , d); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2874 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2875 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2876 // freg -> mem |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2877 int off = STACK_BIAS + reg2offset(dst.first()); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2878 if (Assembler::is_simm13(off)) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2879 __ stf(FloatRegisterImpl::S, src.first()->as_FloatRegister(), |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2880 SP, off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2881 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2882 if (conversion_off == noreg) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2883 __ set(off, L6); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2884 conversion_off = L6; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2885 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2886 __ stf(FloatRegisterImpl::S, src.first()->as_FloatRegister(), |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2887 SP, conversion_off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2888 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2889 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2890 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2891 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2892 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2893 case T_DOUBLE: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2894 assert( j_arg + 1 < total_args_passed && |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2895 in_sig_bt[j_arg + 1] == T_VOID && |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2896 out_sig_bt[c_arg+1] == T_VOID, "bad arg list"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2897 if (src.first()->is_stack()) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2898 // Stack to stack/reg is simple |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2899 long_move(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2900 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2901 Register d = dst.first()->is_reg() ? dst.first()->as_Register() : L2; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2902 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2903 // Destination could be an odd reg on 32bit in which case |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2904 // we can't load direct to the destination. |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2905 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2906 if (!d->is_even() && wordSize == 4) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2907 d = L2; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2908 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2909 int off = STACK_BIAS + conversion_temp * VMRegImpl::stack_slot_size; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2910 if (Assembler::is_simm13(off)) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2911 __ stf(FloatRegisterImpl::D, src.first()->as_FloatRegister(), |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2912 SP, off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2913 __ ld_long(SP, off, d); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2914 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2915 if (conversion_off == noreg) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2916 __ set(off, L6); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2917 conversion_off = L6; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2918 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2919 __ stf(FloatRegisterImpl::D, src.first()->as_FloatRegister(), |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2920 SP, conversion_off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2921 __ ld_long(SP, conversion_off, d); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2922 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2923 if (d == L2) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2924 long_move(masm, reg64_to_VMRegPair(L2), dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2925 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2926 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2927 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2928 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2929 case T_LONG : |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2930 // 32bit can't do a split move of something like g1 -> O0, O1 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2931 // so use a memory temp |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2932 if (src.is_single_phys_reg() && wordSize == 4) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2933 Register tmp = L2; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2934 if (dst.first()->is_reg() && |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2935 (wordSize == 8 || dst.first()->as_Register()->is_even())) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2936 tmp = dst.first()->as_Register(); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2937 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2938 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2939 int off = STACK_BIAS + conversion_temp * VMRegImpl::stack_slot_size; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2940 if (Assembler::is_simm13(off)) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2941 __ stx(src.first()->as_Register(), SP, off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2942 __ ld_long(SP, off, tmp); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2943 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2944 if (conversion_off == noreg) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2945 __ set(off, L6); |
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2946 conversion_off = L6; |
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2947 } |
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2948 __ stx(src.first()->as_Register(), SP, conversion_off); |
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2949 __ ld_long(SP, conversion_off, tmp); |
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2950 } |
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2951 |
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2952 if (tmp == L2) { |
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2953 long_move(masm, reg64_to_VMRegPair(L2), dst); |
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2954 } |
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2955 } else { |
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2956 long_move(masm, src, dst); |
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2957 } |
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2958 break; |
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2959 |
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2960 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); |
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2961 |
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2962 default: |
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2963 move32_64(masm, src, dst); |
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2964 } |
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2965 } |
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2966 |
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2967 |
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2968 // If we have any strings we must store any register based arg to the stack |
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2969 // This includes any still live xmm registers too. |
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2970 |
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2971 if (total_strings > 0 ) { |
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2972 |
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2973 // protect all the arg registers |
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2974 __ save_frame(0); |
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2975 __ mov(G2_thread, L7_thread_cache); |
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2976 const Register L2_string_off = L2; |
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2977 |
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2978 // Get first string offset |
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2979 __ set(string_locs * VMRegImpl::stack_slot_size, L2_string_off); |
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2980 |
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2981 for (c_arg = 0 ; c_arg < total_c_args ; c_arg++ ) { |
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2982 if (out_sig_bt[c_arg] == T_ADDRESS) { |
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2983 |
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2984 VMRegPair dst = out_regs[c_arg]; |
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2985 const Register d = dst.first()->is_reg() ? |
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2986 dst.first()->as_Register()->after_save() : noreg; |
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2987 |
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2988 // It's a string the oop and it was already copied to the out arg |
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2989 // position |
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2990 if (d != noreg) { |
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2991 __ mov(d, O0); |
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2992 } else { |
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2993 assert(Assembler::is_simm13(reg2offset(dst.first()) + STACK_BIAS), |
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2994 "must be"); |
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2995 __ ld_ptr(FP, reg2offset(dst.first()) + STACK_BIAS, O0); |
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2996 } |
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2997 Label skip; |
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2998 |
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2999 __ br_null(O0, false, Assembler::pn, skip); |
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3000 __ delayed()->add(FP, L2_string_off, O1); |
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3001 |
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3002 if (d != noreg) { |
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3003 __ mov(O1, d); |
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3004 } else { |
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3005 assert(Assembler::is_simm13(reg2offset(dst.first()) + STACK_BIAS), |
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3006 "must be"); |
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3007 __ st_ptr(O1, FP, reg2offset(dst.first()) + STACK_BIAS); |
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3008 } |
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3009 |
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3010 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::get_utf), |
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3011 relocInfo::runtime_call_type); |
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3012 __ delayed()->add(L2_string_off, max_dtrace_string_size, L2_string_off); |
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3013 |
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3014 __ bind(skip); |
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3015 |
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3016 } |
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3017 |
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3018 } |
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3019 __ mov(L7_thread_cache, G2_thread); |
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3020 __ restore(); |
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3021 |
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3022 } |
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3023 |
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3024 |
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3025 // Ok now we are done. Need to place the nop that dtrace wants in order to |
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3026 // patch in the trap |
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3027 |
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3028 int patch_offset = ((intptr_t)__ pc()) - start; |
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3029 |
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3030 __ nop(); |
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3031 |
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3032 |
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3033 // Return |
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3034 |
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3035 __ ret(); |
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3036 __ delayed()->restore(); |
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3037 |
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3038 __ flush(); |
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3039 |
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3040 nmethod *nm = nmethod::new_dtrace_nmethod( |
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3041 method, masm->code(), vep_offset, patch_offset, frame_complete, |
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3042 stack_slots / VMRegImpl::slots_per_word); |
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3043 return nm; |
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3044 |
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3045 } |
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3046 |
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3047 #endif // HAVE_DTRACE_H |
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3048 |
0 | 3049 // this function returns the adjust size (in number of words) to a c2i adapter |
3050 // activation for use during deoptimization | |
3051 int Deoptimization::last_frame_adjust(int callee_parameters, int callee_locals) { | |
3052 assert(callee_locals >= callee_parameters, | |
3053 "test and remove; got more parms than locals"); | |
3054 if (callee_locals < callee_parameters) | |
3055 return 0; // No adjustment for negative locals | |
3056 int diff = (callee_locals - callee_parameters) * Interpreter::stackElementWords(); | |
3057 return round_to(diff, WordsPerLong); | |
3058 } | |
3059 | |
3060 // "Top of Stack" slots that may be unused by the calling convention but must | |
3061 // otherwise be preserved. | |
3062 // On Intel these are not necessary and the value can be zero. | |
3063 // On Sparc this describes the words reserved for storing a register window | |
3064 // when an interrupt occurs. | |
3065 uint SharedRuntime::out_preserve_stack_slots() { | |
3066 return frame::register_save_words * VMRegImpl::slots_per_word; | |
3067 } | |
3068 | |
3069 static void gen_new_frame(MacroAssembler* masm, bool deopt) { | |
3070 // | |
3071 // Common out the new frame generation for deopt and uncommon trap | |
3072 // | |
3073 Register G3pcs = G3_scratch; // Array of new pcs (input) | |
3074 Register Oreturn0 = O0; | |
3075 Register Oreturn1 = O1; | |
3076 Register O2UnrollBlock = O2; | |
3077 Register O3array = O3; // Array of frame sizes (input) | |
3078 Register O4array_size = O4; // number of frames (input) | |
3079 Register O7frame_size = O7; // number of frames (input) | |
3080 | |
3081 __ ld_ptr(O3array, 0, O7frame_size); | |
3082 __ sub(G0, O7frame_size, O7frame_size); | |
3083 __ save(SP, O7frame_size, SP); | |
3084 __ ld_ptr(G3pcs, 0, I7); // load frame's new pc | |
3085 | |
3086 #ifdef ASSERT | |
3087 // make sure that the frames are aligned properly | |
3088 #ifndef _LP64 | |
3089 __ btst(wordSize*2-1, SP); | |
3090 __ breakpoint_trap(Assembler::notZero); | |
3091 #endif | |
3092 #endif | |
3093 | |
3094 // Deopt needs to pass some extra live values from frame to frame | |
3095 | |
3096 if (deopt) { | |
3097 __ mov(Oreturn0->after_save(), Oreturn0); | |
3098 __ mov(Oreturn1->after_save(), Oreturn1); | |
3099 } | |
3100 | |
3101 __ mov(O4array_size->after_save(), O4array_size); | |
3102 __ sub(O4array_size, 1, O4array_size); | |
3103 __ mov(O3array->after_save(), O3array); | |
3104 __ mov(O2UnrollBlock->after_save(), O2UnrollBlock); | |
3105 __ add(G3pcs, wordSize, G3pcs); // point to next pc value | |
3106 | |
3107 #ifdef ASSERT | |
3108 // trash registers to show a clear pattern in backtraces | |
3109 __ set(0xDEAD0000, I0); | |
3110 __ add(I0, 2, I1); | |
3111 __ add(I0, 4, I2); | |
3112 __ add(I0, 6, I3); | |
3113 __ add(I0, 8, I4); | |
3114 // Don't touch I5 could have valuable savedSP | |
3115 __ set(0xDEADBEEF, L0); | |
3116 __ mov(L0, L1); | |
3117 __ mov(L0, L2); | |
3118 __ mov(L0, L3); | |
3119 __ mov(L0, L4); | |
3120 __ mov(L0, L5); | |
3121 | |
3122 // trash the return value as there is nothing to return yet | |
3123 __ set(0xDEAD0001, O7); | |
3124 #endif | |
3125 | |
3126 __ mov(SP, O5_savedSP); | |
3127 } | |
3128 | |
3129 | |
3130 static void make_new_frames(MacroAssembler* masm, bool deopt) { | |
3131 // | |
3132 // loop through the UnrollBlock info and create new frames | |
3133 // | |
3134 Register G3pcs = G3_scratch; | |
3135 Register Oreturn0 = O0; | |
3136 Register Oreturn1 = O1; | |
3137 Register O2UnrollBlock = O2; | |
3138 Register O3array = O3; | |
3139 Register O4array_size = O4; | |
3140 Label loop; | |
3141 | |
3142 // Before we make new frames, check to see if stack is available. | |
3143 // Do this after the caller's return address is on top of stack | |
3144 if (UseStackBanging) { | |
3145 // Get total frame size for interpreted frames | |
3146 __ ld(Address(O2UnrollBlock, 0, | |
3147 Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes()), O4); | |
3148 __ bang_stack_size(O4, O3, G3_scratch); | |
3149 } | |
3150 | |
3151 __ ld(Address(O2UnrollBlock, 0, Deoptimization::UnrollBlock::number_of_frames_offset_in_bytes()), O4array_size); | |
3152 __ ld_ptr(Address(O2UnrollBlock, 0, Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes()), G3pcs); | |
3153 | |
3154 __ ld_ptr(Address(O2UnrollBlock, 0, Deoptimization::UnrollBlock::frame_sizes_offset_in_bytes()), O3array); | |
3155 | |
3156 // Adjust old interpreter frame to make space for new frame's extra java locals | |
3157 // | |
3158 // We capture the original sp for the transition frame only because it is needed in | |
3159 // order to properly calculate interpreter_sp_adjustment. Even though in real life | |
3160 // every interpreter frame captures a savedSP it is only needed at the transition | |
3161 // (fortunately). If we had to have it correct everywhere then we would need to | |
3162 // be told the sp_adjustment for each frame we create. If the frame size array | |
3163 // were to have twice the frame count entries then we could have pairs [sp_adjustment, frame_size] | |
3164 // for each frame we create and keep up the illusion every where. | |
3165 // | |
3166 | |
3167 __ ld(Address(O2UnrollBlock, 0, Deoptimization::UnrollBlock::caller_adjustment_offset_in_bytes()), O7); | |
3168 __ mov(SP, O5_savedSP); // remember initial sender's original sp before adjustment | |
3169 __ sub(SP, O7, SP); | |
3170 | |
3171 #ifdef ASSERT | |
3172 // make sure that there is at least one entry in the array | |
3173 __ tst(O4array_size); | |
3174 __ breakpoint_trap(Assembler::zero); | |
3175 #endif | |
3176 | |
3177 // Now push the new interpreter frames | |
3178 __ bind(loop); | |
3179 | |
3180 // allocate a new frame, filling the registers | |
3181 | |
3182 gen_new_frame(masm, deopt); // allocate an interpreter frame | |
3183 | |
3184 __ tst(O4array_size); | |
3185 __ br(Assembler::notZero, false, Assembler::pn, loop); | |
3186 __ delayed()->add(O3array, wordSize, O3array); | |
3187 __ ld_ptr(G3pcs, 0, O7); // load final frame new pc | |
3188 | |
3189 } | |
3190 | |
3191 //------------------------------generate_deopt_blob---------------------------- | |
3192 // Ought to generate an ideal graph & compile, but here's some SPARC ASM | |
3193 // instead. | |
3194 void SharedRuntime::generate_deopt_blob() { | |
3195 // allocate space for the code | |
3196 ResourceMark rm; | |
3197 // setup code generation tools | |
3198 int pad = VerifyThread ? 512 : 0;// Extra slop space for more verify code | |
3199 #ifdef _LP64 | |
3200 CodeBuffer buffer("deopt_blob", 2100+pad, 512); | |
3201 #else | |
3202 // Measured 8/7/03 at 1212 in 32bit debug build (no VerifyThread) | |
3203 // Measured 8/7/03 at 1396 in 32bit debug build (VerifyThread) | |
3204 CodeBuffer buffer("deopt_blob", 1600+pad, 512); | |
3205 #endif /* _LP64 */ | |
3206 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3207 FloatRegister Freturn0 = F0; | |
3208 Register Greturn1 = G1; | |
3209 Register Oreturn0 = O0; | |
3210 Register Oreturn1 = O1; | |
3211 Register O2UnrollBlock = O2; | |
3212 Register O3tmp = O3; | |
3213 Register I5exception_tmp = I5; | |
3214 Register G4exception_tmp = G4_scratch; | |
3215 int frame_size_words; | |
3216 Address saved_Freturn0_addr(FP, 0, -sizeof(double) + STACK_BIAS); | |
3217 #if !defined(_LP64) && defined(COMPILER2) | |
3218 Address saved_Greturn1_addr(FP, 0, -sizeof(double) -sizeof(jlong) + STACK_BIAS); | |
3219 #endif | |
3220 Label cont; | |
3221 | |
3222 OopMapSet *oop_maps = new OopMapSet(); | |
3223 | |
3224 // | |
3225 // This is the entry point for code which is returning to a de-optimized | |
3226 // frame. | |
3227 // The steps taken by this frame are as follows: | |
3228 // - push a dummy "register_save" and save the return values (O0, O1, F0/F1, G1) | |
3229 // and all potentially live registers (at a pollpoint many registers can be live). | |
3230 // | |
3231 // - call the C routine: Deoptimization::fetch_unroll_info (this function | |
3232 // returns information about the number and size of interpreter frames | |
3233 // which are equivalent to the frame which is being deoptimized) | |
3234 // - deallocate the unpack frame, restoring only results values. Other | |
3235 // volatile registers will now be captured in the vframeArray as needed. | |
3236 // - deallocate the deoptimization frame | |
3237 // - in a loop using the information returned in the previous step | |
3238 // push new interpreter frames (take care to propagate the return | |
3239 // values through each new frame pushed) | |
3240 // - create a dummy "unpack_frame" and save the return values (O0, O1, F0) | |
3241 // - call the C routine: Deoptimization::unpack_frames (this function | |
3242 // lays out values on the interpreter frame which was just created) | |
3243 // - deallocate the dummy unpack_frame | |
3244 // - ensure that all the return values are correctly set and then do | |
3245 // a return to the interpreter entry point | |
3246 // | |
3247 // Refer to the following methods for more information: | |
3248 // - Deoptimization::fetch_unroll_info | |
3249 // - Deoptimization::unpack_frames | |
3250 | |
3251 OopMap* map = NULL; | |
3252 | |
3253 int start = __ offset(); | |
3254 | |
3255 // restore G2, the trampoline destroyed it | |
3256 __ get_thread(); | |
3257 | |
3258 // On entry we have been called by the deoptimized nmethod with a call that | |
3259 // replaced the original call (or safepoint polling location) so the deoptimizing | |
3260 // pc is now in O7. Return values are still in the expected places | |
3261 | |
3262 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
3263 __ ba(false, cont); | |
3264 __ delayed()->mov(Deoptimization::Unpack_deopt, I5exception_tmp); | |
3265 | |
3266 int exception_offset = __ offset() - start; | |
3267 | |
3268 // restore G2, the trampoline destroyed it | |
3269 __ get_thread(); | |
3270 | |
3271 // On entry we have been jumped to by the exception handler (or exception_blob | |
3272 // for server). O0 contains the exception oop and O7 contains the original | |
3273 // exception pc. So if we push a frame here it will look to the | |
3274 // stack walking code (fetch_unroll_info) just like a normal call so | |
3275 // state will be extracted normally. | |
3276 | |
3277 // save exception oop in JavaThread and fall through into the | |
3278 // exception_in_tls case since they are handled in same way except | |
3279 // for where the pending exception is kept. | |
3280 __ st_ptr(Oexception, G2_thread, in_bytes(JavaThread::exception_oop_offset())); | |
3281 | |
3282 // | |
3283 // Vanilla deoptimization with an exception pending in exception_oop | |
3284 // | |
3285 int exception_in_tls_offset = __ offset() - start; | |
3286 | |
3287 // No need to update oop_map as each call to save_live_registers will produce identical oopmap | |
3288 (void) RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
3289 | |
3290 // Restore G2_thread | |
3291 __ get_thread(); | |
3292 | |
3293 #ifdef ASSERT | |
3294 { | |
3295 // verify that there is really an exception oop in exception_oop | |
3296 Label has_exception; | |
3297 __ ld_ptr(G2_thread, in_bytes(JavaThread::exception_oop_offset()), Oexception); | |
3298 __ br_notnull(Oexception, false, Assembler::pt, has_exception); | |
3299 __ delayed()-> nop(); | |
3300 __ stop("no exception in thread"); | |
3301 __ bind(has_exception); | |
3302 | |
3303 // verify that there is no pending exception | |
3304 Label no_pending_exception; | |
3305 Address exception_addr(G2_thread, 0, in_bytes(Thread::pending_exception_offset())); | |
3306 __ ld_ptr(exception_addr, Oexception); | |
3307 __ br_null(Oexception, false, Assembler::pt, no_pending_exception); | |
3308 __ delayed()->nop(); | |
3309 __ stop("must not have pending exception here"); | |
3310 __ bind(no_pending_exception); | |
3311 } | |
3312 #endif | |
3313 | |
3314 __ ba(false, cont); | |
3315 __ delayed()->mov(Deoptimization::Unpack_exception, I5exception_tmp);; | |
3316 | |
3317 // | |
3318 // Reexecute entry, similar to c2 uncommon trap | |
3319 // | |
3320 int reexecute_offset = __ offset() - start; | |
3321 | |
3322 // No need to update oop_map as each call to save_live_registers will produce identical oopmap | |
3323 (void) RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
3324 | |
3325 __ mov(Deoptimization::Unpack_reexecute, I5exception_tmp); | |
3326 | |
3327 __ bind(cont); | |
3328 | |
3329 __ set_last_Java_frame(SP, noreg); | |
3330 | |
3331 // do the call by hand so we can get the oopmap | |
3332 | |
3333 __ mov(G2_thread, L7_thread_cache); | |
3334 __ call(CAST_FROM_FN_PTR(address, Deoptimization::fetch_unroll_info), relocInfo::runtime_call_type); | |
3335 __ delayed()->mov(G2_thread, O0); | |
3336 | |
3337 // Set an oopmap for the call site this describes all our saved volatile registers | |
3338 | |
3339 oop_maps->add_gc_map( __ offset()-start, map); | |
3340 | |
3341 __ mov(L7_thread_cache, G2_thread); | |
3342 | |
3343 __ reset_last_Java_frame(); | |
3344 | |
3345 // NOTE: we know that only O0/O1 will be reloaded by restore_result_registers | |
3346 // so this move will survive | |
3347 | |
3348 __ mov(I5exception_tmp, G4exception_tmp); | |
3349 | |
3350 __ mov(O0, O2UnrollBlock->after_save()); | |
3351 | |
3352 RegisterSaver::restore_result_registers(masm); | |
3353 | |
3354 Label noException; | |
3355 __ cmp(G4exception_tmp, Deoptimization::Unpack_exception); // Was exception pending? | |
3356 __ br(Assembler::notEqual, false, Assembler::pt, noException); | |
3357 __ delayed()->nop(); | |
3358 | |
3359 // Move the pending exception from exception_oop to Oexception so | |
3360 // the pending exception will be picked up the interpreter. | |
3361 __ ld_ptr(G2_thread, in_bytes(JavaThread::exception_oop_offset()), Oexception); | |
3362 __ st_ptr(G0, G2_thread, in_bytes(JavaThread::exception_oop_offset())); | |
3363 __ bind(noException); | |
3364 | |
3365 // deallocate the deoptimization frame taking care to preserve the return values | |
3366 __ mov(Oreturn0, Oreturn0->after_save()); | |
3367 __ mov(Oreturn1, Oreturn1->after_save()); | |
3368 __ mov(O2UnrollBlock, O2UnrollBlock->after_save()); | |
3369 __ restore(); | |
3370 | |
3371 // Allocate new interpreter frame(s) and possible c2i adapter frame | |
3372 | |
3373 make_new_frames(masm, true); | |
3374 | |
3375 // push a dummy "unpack_frame" taking care of float return values and | |
3376 // call Deoptimization::unpack_frames to have the unpacker layout | |
3377 // information in the interpreter frames just created and then return | |
3378 // to the interpreter entry point | |
3379 __ save(SP, -frame_size_words*wordSize, SP); | |
3380 __ stf(FloatRegisterImpl::D, Freturn0, saved_Freturn0_addr); | |
3381 #if !defined(_LP64) | |
3382 #if defined(COMPILER2) | |
3383 if (!TieredCompilation) { | |
3384 // 32-bit 1-register longs return longs in G1 | |
3385 __ stx(Greturn1, saved_Greturn1_addr); | |
3386 } | |
3387 #endif | |
3388 __ set_last_Java_frame(SP, noreg); | |
3389 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames), G2_thread, G4exception_tmp); | |
3390 #else | |
3391 // LP64 uses g4 in set_last_Java_frame | |
3392 __ mov(G4exception_tmp, O1); | |
3393 __ set_last_Java_frame(SP, G0); | |
3394 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames), G2_thread, O1); | |
3395 #endif | |
3396 __ reset_last_Java_frame(); | |
3397 __ ldf(FloatRegisterImpl::D, saved_Freturn0_addr, Freturn0); | |
3398 | |
3399 // In tiered we never use C2 to compile methods returning longs so | |
3400 // the result is where we expect it already. | |
3401 | |
3402 #if !defined(_LP64) && defined(COMPILER2) | |
3403 // In 32 bit, C2 returns longs in G1 so restore the saved G1 into | |
3404 // I0/I1 if the return value is long. In the tiered world there is | |
3405 // a mismatch between how C1 and C2 return longs compiles and so | |
3406 // currently compilation of methods which return longs is disabled | |
3407 // for C2 and so is this code. Eventually C1 and C2 will do the | |
3408 // same thing for longs in the tiered world. | |
3409 if (!TieredCompilation) { | |
3410 Label not_long; | |
3411 __ cmp(O0,T_LONG); | |
3412 __ br(Assembler::notEqual, false, Assembler::pt, not_long); | |
3413 __ delayed()->nop(); | |
3414 __ ldd(saved_Greturn1_addr,I0); | |
3415 __ bind(not_long); | |
3416 } | |
3417 #endif | |
3418 __ ret(); | |
3419 __ delayed()->restore(); | |
3420 | |
3421 masm->flush(); | |
3422 _deopt_blob = DeoptimizationBlob::create(&buffer, oop_maps, 0, exception_offset, reexecute_offset, frame_size_words); | |
3423 _deopt_blob->set_unpack_with_exception_in_tls_offset(exception_in_tls_offset); | |
3424 } | |
3425 | |
3426 #ifdef COMPILER2 | |
3427 | |
3428 //------------------------------generate_uncommon_trap_blob-------------------- | |
3429 // Ought to generate an ideal graph & compile, but here's some SPARC ASM | |
3430 // instead. | |
3431 void SharedRuntime::generate_uncommon_trap_blob() { | |
3432 // allocate space for the code | |
3433 ResourceMark rm; | |
3434 // setup code generation tools | |
3435 int pad = VerifyThread ? 512 : 0; | |
3436 #ifdef _LP64 | |
3437 CodeBuffer buffer("uncommon_trap_blob", 2700+pad, 512); | |
3438 #else | |
3439 // Measured 8/7/03 at 660 in 32bit debug build (no VerifyThread) | |
3440 // Measured 8/7/03 at 1028 in 32bit debug build (VerifyThread) | |
3441 CodeBuffer buffer("uncommon_trap_blob", 2000+pad, 512); | |
3442 #endif | |
3443 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3444 Register O2UnrollBlock = O2; | |
3445 Register O3tmp = O3; | |
3446 Register O2klass_index = O2; | |
3447 | |
3448 // | |
3449 // This is the entry point for all traps the compiler takes when it thinks | |
3450 // it cannot handle further execution of compilation code. The frame is | |
3451 // deoptimized in these cases and converted into interpreter frames for | |
3452 // execution | |
3453 // The steps taken by this frame are as follows: | |
3454 // - push a fake "unpack_frame" | |
3455 // - call the C routine Deoptimization::uncommon_trap (this function | |
3456 // packs the current compiled frame into vframe arrays and returns | |
3457 // information about the number and size of interpreter frames which | |
3458 // are equivalent to the frame which is being deoptimized) | |
3459 // - deallocate the "unpack_frame" | |
3460 // - deallocate the deoptimization frame | |
3461 // - in a loop using the information returned in the previous step | |
3462 // push interpreter frames; | |
3463 // - create a dummy "unpack_frame" | |
3464 // - call the C routine: Deoptimization::unpack_frames (this function | |
3465 // lays out values on the interpreter frame which was just created) | |
3466 // - deallocate the dummy unpack_frame | |
3467 // - return to the interpreter entry point | |
3468 // | |
3469 // Refer to the following methods for more information: | |
3470 // - Deoptimization::uncommon_trap | |
3471 // - Deoptimization::unpack_frame | |
3472 | |
3473 // the unloaded class index is in O0 (first parameter to this blob) | |
3474 | |
3475 // push a dummy "unpack_frame" | |
3476 // and call Deoptimization::uncommon_trap to pack the compiled frame into | |
3477 // vframe array and return the UnrollBlock information | |
3478 __ save_frame(0); | |
3479 __ set_last_Java_frame(SP, noreg); | |
3480 __ mov(I0, O2klass_index); | |
3481 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap), G2_thread, O2klass_index); | |
3482 __ reset_last_Java_frame(); | |
3483 __ mov(O0, O2UnrollBlock->after_save()); | |
3484 __ restore(); | |
3485 | |
3486 // deallocate the deoptimized frame taking care to preserve the return values | |
3487 __ mov(O2UnrollBlock, O2UnrollBlock->after_save()); | |
3488 __ restore(); | |
3489 | |
3490 // Allocate new interpreter frame(s) and possible c2i adapter frame | |
3491 | |
3492 make_new_frames(masm, false); | |
3493 | |
3494 // push a dummy "unpack_frame" taking care of float return values and | |
3495 // call Deoptimization::unpack_frames to have the unpacker layout | |
3496 // information in the interpreter frames just created and then return | |
3497 // to the interpreter entry point | |
3498 __ save_frame(0); | |
3499 __ set_last_Java_frame(SP, noreg); | |
3500 __ mov(Deoptimization::Unpack_uncommon_trap, O3); // indicate it is the uncommon trap case | |
3501 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames), G2_thread, O3); | |
3502 __ reset_last_Java_frame(); | |
3503 __ ret(); | |
3504 __ delayed()->restore(); | |
3505 | |
3506 masm->flush(); | |
3507 _uncommon_trap_blob = UncommonTrapBlob::create(&buffer, NULL, __ total_frame_size_in_bytes(0)/wordSize); | |
3508 } | |
3509 | |
3510 #endif // COMPILER2 | |
3511 | |
3512 //------------------------------generate_handler_blob------------------- | |
3513 // | |
3514 // Generate a special Compile2Runtime blob that saves all registers, and sets | |
3515 // up an OopMap. | |
3516 // | |
3517 // This blob is jumped to (via a breakpoint and the signal handler) from a | |
3518 // safepoint in compiled code. On entry to this blob, O7 contains the | |
3519 // address in the original nmethod at which we should resume normal execution. | |
3520 // Thus, this blob looks like a subroutine which must preserve lots of | |
3521 // registers and return normally. Note that O7 is never register-allocated, | |
3522 // so it is guaranteed to be free here. | |
3523 // | |
3524 | |
3525 // The hardest part of what this blob must do is to save the 64-bit %o | |
3526 // registers in the 32-bit build. A simple 'save' turn the %o's to %i's and | |
3527 // an interrupt will chop off their heads. Making space in the caller's frame | |
3528 // first will let us save the 64-bit %o's before save'ing, but we cannot hand | |
3529 // the adjusted FP off to the GC stack-crawler: this will modify the caller's | |
3530 // SP and mess up HIS OopMaps. So we first adjust the caller's SP, then save | |
3531 // the 64-bit %o's, then do a save, then fixup the caller's SP (our FP). | |
3532 // Tricky, tricky, tricky... | |
3533 | |
3534 static SafepointBlob* generate_handler_blob(address call_ptr, bool cause_return) { | |
3535 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); | |
3536 | |
3537 // allocate space for the code | |
3538 ResourceMark rm; | |
3539 // setup code generation tools | |
3540 // Measured 8/7/03 at 896 in 32bit debug build (no VerifyThread) | |
3541 // Measured 8/7/03 at 1080 in 32bit debug build (VerifyThread) | |
3542 // even larger with TraceJumps | |
3543 int pad = TraceJumps ? 512 : 0; | |
3544 CodeBuffer buffer("handler_blob", 1600 + pad, 512); | |
3545 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3546 int frame_size_words; | |
3547 OopMapSet *oop_maps = new OopMapSet(); | |
3548 OopMap* map = NULL; | |
3549 | |
3550 int start = __ offset(); | |
3551 | |
3552 // If this causes a return before the processing, then do a "restore" | |
3553 if (cause_return) { | |
3554 __ restore(); | |
3555 } else { | |
3556 // Make it look like we were called via the poll | |
3557 // so that frame constructor always sees a valid return address | |
3558 __ ld_ptr(G2_thread, in_bytes(JavaThread::saved_exception_pc_offset()), O7); | |
3559 __ sub(O7, frame::pc_return_offset, O7); | |
3560 } | |
3561 | |
3562 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
3563 | |
3564 // setup last_Java_sp (blows G4) | |
3565 __ set_last_Java_frame(SP, noreg); | |
3566 | |
3567 // call into the runtime to handle illegal instructions exception | |
3568 // Do not use call_VM_leaf, because we need to make a GC map at this call site. | |
3569 __ mov(G2_thread, O0); | |
3570 __ save_thread(L7_thread_cache); | |
3571 __ call(call_ptr); | |
3572 __ delayed()->nop(); | |
3573 | |
3574 // Set an oopmap for the call site. | |
3575 // We need this not only for callee-saved registers, but also for volatile | |
3576 // registers that the compiler might be keeping live across a safepoint. | |
3577 | |
3578 oop_maps->add_gc_map( __ offset() - start, map); | |
3579 | |
3580 __ restore_thread(L7_thread_cache); | |
3581 // clear last_Java_sp | |
3582 __ reset_last_Java_frame(); | |
3583 | |
3584 // Check for exceptions | |
3585 Label pending; | |
3586 | |
3587 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), O1); | |
3588 __ tst(O1); | |
3589 __ brx(Assembler::notEqual, true, Assembler::pn, pending); | |
3590 __ delayed()->nop(); | |
3591 | |
3592 RegisterSaver::restore_live_registers(masm); | |
3593 | |
3594 // We are back the the original state on entry and ready to go. | |
3595 | |
3596 __ retl(); | |
3597 __ delayed()->nop(); | |
3598 | |
3599 // Pending exception after the safepoint | |
3600 | |
3601 __ bind(pending); | |
3602 | |
3603 RegisterSaver::restore_live_registers(masm); | |
3604 | |
3605 // We are back the the original state on entry. | |
3606 | |
3607 // Tail-call forward_exception_entry, with the issuing PC in O7, | |
3608 // so it looks like the original nmethod called forward_exception_entry. | |
3609 __ set((intptr_t)StubRoutines::forward_exception_entry(), O0); | |
3610 __ JMP(O0, 0); | |
3611 __ delayed()->nop(); | |
3612 | |
3613 // ------------- | |
3614 // make sure all code is generated | |
3615 masm->flush(); | |
3616 | |
3617 // return exception blob | |
3618 return SafepointBlob::create(&buffer, oop_maps, frame_size_words); | |
3619 } | |
3620 | |
3621 // | |
3622 // generate_resolve_blob - call resolution (static/virtual/opt-virtual/ic-miss | |
3623 // | |
3624 // Generate a stub that calls into vm to find out the proper destination | |
3625 // of a java call. All the argument registers are live at this point | |
3626 // but since this is generic code we don't know what they are and the caller | |
3627 // must do any gc of the args. | |
3628 // | |
3629 static RuntimeStub* generate_resolve_blob(address destination, const char* name) { | |
3630 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); | |
3631 | |
3632 // allocate space for the code | |
3633 ResourceMark rm; | |
3634 // setup code generation tools | |
3635 // Measured 8/7/03 at 896 in 32bit debug build (no VerifyThread) | |
3636 // Measured 8/7/03 at 1080 in 32bit debug build (VerifyThread) | |
3637 // even larger with TraceJumps | |
3638 int pad = TraceJumps ? 512 : 0; | |
3639 CodeBuffer buffer(name, 1600 + pad, 512); | |
3640 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3641 int frame_size_words; | |
3642 OopMapSet *oop_maps = new OopMapSet(); | |
3643 OopMap* map = NULL; | |
3644 | |
3645 int start = __ offset(); | |
3646 | |
3647 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
3648 | |
3649 int frame_complete = __ offset(); | |
3650 | |
3651 // setup last_Java_sp (blows G4) | |
3652 __ set_last_Java_frame(SP, noreg); | |
3653 | |
3654 // call into the runtime to handle illegal instructions exception | |
3655 // Do not use call_VM_leaf, because we need to make a GC map at this call site. | |
3656 __ mov(G2_thread, O0); | |
3657 __ save_thread(L7_thread_cache); | |
3658 __ call(destination, relocInfo::runtime_call_type); | |
3659 __ delayed()->nop(); | |
3660 | |
3661 // O0 contains the address we are going to jump to assuming no exception got installed | |
3662 | |
3663 // Set an oopmap for the call site. | |
3664 // We need this not only for callee-saved registers, but also for volatile | |
3665 // registers that the compiler might be keeping live across a safepoint. | |
3666 | |
3667 oop_maps->add_gc_map( __ offset() - start, map); | |
3668 | |
3669 __ restore_thread(L7_thread_cache); | |
3670 // clear last_Java_sp | |
3671 __ reset_last_Java_frame(); | |
3672 | |
3673 // Check for exceptions | |
3674 Label pending; | |
3675 | |
3676 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), O1); | |
3677 __ tst(O1); | |
3678 __ brx(Assembler::notEqual, true, Assembler::pn, pending); | |
3679 __ delayed()->nop(); | |
3680 | |
3681 // get the returned methodOop | |
3682 | |
3683 __ get_vm_result(G5_method); | |
3684 __ stx(G5_method, SP, RegisterSaver::G5_offset()+STACK_BIAS); | |
3685 | |
3686 // O0 is where we want to jump, overwrite G3 which is saved and scratch | |
3687 | |
3688 __ stx(O0, SP, RegisterSaver::G3_offset()+STACK_BIAS); | |
3689 | |
3690 RegisterSaver::restore_live_registers(masm); | |
3691 | |
3692 // We are back the the original state on entry and ready to go. | |
3693 | |
3694 __ JMP(G3, 0); | |
3695 __ delayed()->nop(); | |
3696 | |
3697 // Pending exception after the safepoint | |
3698 | |
3699 __ bind(pending); | |
3700 | |
3701 RegisterSaver::restore_live_registers(masm); | |
3702 | |
3703 // We are back the the original state on entry. | |
3704 | |
3705 // Tail-call forward_exception_entry, with the issuing PC in O7, | |
3706 // so it looks like the original nmethod called forward_exception_entry. | |
3707 __ set((intptr_t)StubRoutines::forward_exception_entry(), O0); | |
3708 __ JMP(O0, 0); | |
3709 __ delayed()->nop(); | |
3710 | |
3711 // ------------- | |
3712 // make sure all code is generated | |
3713 masm->flush(); | |
3714 | |
3715 // return the blob | |
3716 // frame_size_words or bytes?? | |
3717 return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_words, oop_maps, true); | |
3718 } | |
3719 | |
3720 void SharedRuntime::generate_stubs() { | |
3721 | |
3722 _wrong_method_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method), | |
3723 "wrong_method_stub"); | |
3724 | |
3725 _ic_miss_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_ic_miss), | |
3726 "ic_miss_stub"); | |
3727 | |
3728 _resolve_opt_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_opt_virtual_call_C), | |
3729 "resolve_opt_virtual_call"); | |
3730 | |
3731 _resolve_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_virtual_call_C), | |
3732 "resolve_virtual_call"); | |
3733 | |
3734 _resolve_static_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_static_call_C), | |
3735 "resolve_static_call"); | |
3736 | |
3737 _polling_page_safepoint_handler_blob = | |
3738 generate_handler_blob(CAST_FROM_FN_PTR(address, | |
3739 SafepointSynchronize::handle_polling_page_exception), false); | |
3740 | |
3741 _polling_page_return_handler_blob = | |
3742 generate_handler_blob(CAST_FROM_FN_PTR(address, | |
3743 SafepointSynchronize::handle_polling_page_exception), true); | |
3744 | |
3745 generate_deopt_blob(); | |
3746 | |
3747 #ifdef COMPILER2 | |
3748 generate_uncommon_trap_blob(); | |
3749 #endif // COMPILER2 | |
3750 } |