Mercurial > hg > truffle
annotate src/cpu/sparc/vm/sharedRuntime_sparc.cpp @ 4591:33f181ad79d5
changed DynamicSizeBasedInliningPolicy to use log(probability) for frequently executed loops, added check for SmallCompiledCodeSize to WeightBasedInliningPolicy.
author | Christian Haeubl <christian.haeubl@oracle.com> |
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date | Mon, 13 Feb 2012 18:40:54 -0800 |
parents | 6729bbc1fcd6 |
children | 0382d2b469b2 |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "asm/assembler.hpp" | |
27 #include "assembler_sparc.inline.hpp" | |
28 #include "code/debugInfoRec.hpp" | |
29 #include "code/icBuffer.hpp" | |
30 #include "code/vtableStubs.hpp" | |
31 #include "interpreter/interpreter.hpp" | |
32 #include "oops/compiledICHolderOop.hpp" | |
33 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
34 #include "runtime/sharedRuntime.hpp" | |
35 #include "runtime/vframeArray.hpp" | |
36 #include "vmreg_sparc.inline.hpp" | |
37 #ifdef COMPILER1 | |
38 #include "c1/c1_Runtime1.hpp" | |
39 #endif | |
40 #ifdef COMPILER2 | |
41 #include "opto/runtime.hpp" | |
42 #endif | |
43 #ifdef SHARK | |
44 #include "compiler/compileBroker.hpp" | |
45 #include "shark/sharkCompiler.hpp" | |
46 #endif | |
0 | 47 |
48 #define __ masm-> | |
49 | |
50 | |
51 class RegisterSaver { | |
52 | |
53 // Used for saving volatile registers. This is Gregs, Fregs, I/L/O. | |
54 // The Oregs are problematic. In the 32bit build the compiler can | |
55 // have O registers live with 64 bit quantities. A window save will | |
56 // cut the heads off of the registers. We have to do a very extensive | |
57 // stack dance to save and restore these properly. | |
58 | |
59 // Note that the Oregs problem only exists if we block at either a polling | |
60 // page exception a compiled code safepoint that was not originally a call | |
61 // or deoptimize following one of these kinds of safepoints. | |
62 | |
63 // Lots of registers to save. For all builds, a window save will preserve | |
64 // the %i and %l registers. For the 32-bit longs-in-two entries and 64-bit | |
65 // builds a window-save will preserve the %o registers. In the LION build | |
66 // we need to save the 64-bit %o registers which requires we save them | |
67 // before the window-save (as then they become %i registers and get their | |
68 // heads chopped off on interrupt). We have to save some %g registers here | |
69 // as well. | |
70 enum { | |
71 // This frame's save area. Includes extra space for the native call: | |
72 // vararg's layout space and the like. Briefly holds the caller's | |
73 // register save area. | |
74 call_args_area = frame::register_save_words_sp_offset + | |
75 frame::memory_parameter_word_sp_offset*wordSize, | |
76 // Make sure save locations are always 8 byte aligned. | |
77 // can't use round_to because it doesn't produce compile time constant | |
78 start_of_extra_save_area = ((call_args_area + 7) & ~7), | |
79 g1_offset = start_of_extra_save_area, // g-regs needing saving | |
80 g3_offset = g1_offset+8, | |
81 g4_offset = g3_offset+8, | |
82 g5_offset = g4_offset+8, | |
83 o0_offset = g5_offset+8, | |
84 o1_offset = o0_offset+8, | |
85 o2_offset = o1_offset+8, | |
86 o3_offset = o2_offset+8, | |
87 o4_offset = o3_offset+8, | |
88 o5_offset = o4_offset+8, | |
89 start_of_flags_save_area = o5_offset+8, | |
90 ccr_offset = start_of_flags_save_area, | |
91 fsr_offset = ccr_offset + 8, | |
92 d00_offset = fsr_offset+8, // Start of float save area | |
93 register_save_size = d00_offset+8*32 | |
94 }; | |
95 | |
96 | |
97 public: | |
98 | |
99 static int Oexception_offset() { return o0_offset; }; | |
100 static int G3_offset() { return g3_offset; }; | |
101 static int G5_offset() { return g5_offset; }; | |
102 static OopMap* save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words); | |
103 static void restore_live_registers(MacroAssembler* masm); | |
104 | |
105 // During deoptimization only the result register need to be restored | |
106 // all the other values have already been extracted. | |
107 | |
108 static void restore_result_registers(MacroAssembler* masm); | |
109 }; | |
110 | |
111 OopMap* RegisterSaver::save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words) { | |
112 // Record volatile registers as callee-save values in an OopMap so their save locations will be | |
113 // propagated to the caller frame's RegisterMap during StackFrameStream construction (needed for | |
114 // deoptimization; see compiledVFrame::create_stack_value). The caller's I, L and O registers | |
115 // are saved in register windows - I's and L's in the caller's frame and O's in the stub frame | |
116 // (as the stub's I's) when the runtime routine called by the stub creates its frame. | |
117 int i; | |
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118 // Always make the frame size 16 byte aligned. |
0 | 119 int frame_size = round_to(additional_frame_words + register_save_size, 16); |
120 // OopMap frame size is in c2 stack slots (sizeof(jint)) not bytes or words | |
121 int frame_size_in_slots = frame_size / sizeof(jint); | |
122 // CodeBlob frame size is in words. | |
123 *total_frame_words = frame_size / wordSize; | |
124 // OopMap* map = new OopMap(*total_frame_words, 0); | |
125 OopMap* map = new OopMap(frame_size_in_slots, 0); | |
126 | |
127 #if !defined(_LP64) | |
128 | |
129 // Save 64-bit O registers; they will get their heads chopped off on a 'save'. | |
130 __ stx(O0, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8); | |
131 __ stx(O1, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8); | |
132 __ stx(O2, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+2*8); | |
133 __ stx(O3, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+3*8); | |
134 __ stx(O4, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+4*8); | |
135 __ stx(O5, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+5*8); | |
136 #endif /* _LP64 */ | |
137 | |
138 __ save(SP, -frame_size, SP); | |
139 | |
140 #ifndef _LP64 | |
141 // Reload the 64 bit Oregs. Although they are now Iregs we load them | |
142 // to Oregs here to avoid interrupts cutting off their heads | |
143 | |
144 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8, O0); | |
145 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8, O1); | |
146 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+2*8, O2); | |
147 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+3*8, O3); | |
148 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+4*8, O4); | |
149 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+5*8, O5); | |
150 | |
151 __ stx(O0, SP, o0_offset+STACK_BIAS); | |
152 map->set_callee_saved(VMRegImpl::stack2reg((o0_offset + 4)>>2), O0->as_VMReg()); | |
153 | |
154 __ stx(O1, SP, o1_offset+STACK_BIAS); | |
155 | |
156 map->set_callee_saved(VMRegImpl::stack2reg((o1_offset + 4)>>2), O1->as_VMReg()); | |
157 | |
158 __ stx(O2, SP, o2_offset+STACK_BIAS); | |
159 map->set_callee_saved(VMRegImpl::stack2reg((o2_offset + 4)>>2), O2->as_VMReg()); | |
160 | |
161 __ stx(O3, SP, o3_offset+STACK_BIAS); | |
162 map->set_callee_saved(VMRegImpl::stack2reg((o3_offset + 4)>>2), O3->as_VMReg()); | |
163 | |
164 __ stx(O4, SP, o4_offset+STACK_BIAS); | |
165 map->set_callee_saved(VMRegImpl::stack2reg((o4_offset + 4)>>2), O4->as_VMReg()); | |
166 | |
167 __ stx(O5, SP, o5_offset+STACK_BIAS); | |
168 map->set_callee_saved(VMRegImpl::stack2reg((o5_offset + 4)>>2), O5->as_VMReg()); | |
169 #endif /* _LP64 */ | |
170 | |
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171 |
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172 #ifdef _LP64 |
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173 int debug_offset = 0; |
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174 #else |
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175 int debug_offset = 4; |
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176 #endif |
0 | 177 // Save the G's |
178 __ stx(G1, SP, g1_offset+STACK_BIAS); | |
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179 map->set_callee_saved(VMRegImpl::stack2reg((g1_offset + debug_offset)>>2), G1->as_VMReg()); |
0 | 180 |
181 __ stx(G3, SP, g3_offset+STACK_BIAS); | |
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182 map->set_callee_saved(VMRegImpl::stack2reg((g3_offset + debug_offset)>>2), G3->as_VMReg()); |
0 | 183 |
184 __ stx(G4, SP, g4_offset+STACK_BIAS); | |
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185 map->set_callee_saved(VMRegImpl::stack2reg((g4_offset + debug_offset)>>2), G4->as_VMReg()); |
0 | 186 |
187 __ stx(G5, SP, g5_offset+STACK_BIAS); | |
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188 map->set_callee_saved(VMRegImpl::stack2reg((g5_offset + debug_offset)>>2), G5->as_VMReg()); |
0 | 189 |
190 // This is really a waste but we'll keep things as they were for now | |
191 if (true) { | |
192 #ifndef _LP64 | |
193 map->set_callee_saved(VMRegImpl::stack2reg((o0_offset)>>2), O0->as_VMReg()->next()); | |
194 map->set_callee_saved(VMRegImpl::stack2reg((o1_offset)>>2), O1->as_VMReg()->next()); | |
195 map->set_callee_saved(VMRegImpl::stack2reg((o2_offset)>>2), O2->as_VMReg()->next()); | |
196 map->set_callee_saved(VMRegImpl::stack2reg((o3_offset)>>2), O3->as_VMReg()->next()); | |
197 map->set_callee_saved(VMRegImpl::stack2reg((o4_offset)>>2), O4->as_VMReg()->next()); | |
198 map->set_callee_saved(VMRegImpl::stack2reg((o5_offset)>>2), O5->as_VMReg()->next()); | |
199 map->set_callee_saved(VMRegImpl::stack2reg((g1_offset)>>2), G1->as_VMReg()->next()); | |
200 map->set_callee_saved(VMRegImpl::stack2reg((g3_offset)>>2), G3->as_VMReg()->next()); | |
201 map->set_callee_saved(VMRegImpl::stack2reg((g4_offset)>>2), G4->as_VMReg()->next()); | |
202 map->set_callee_saved(VMRegImpl::stack2reg((g5_offset)>>2), G5->as_VMReg()->next()); | |
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203 #endif /* _LP64 */ |
0 | 204 } |
205 | |
206 | |
207 // Save the flags | |
208 __ rdccr( G5 ); | |
209 __ stx(G5, SP, ccr_offset+STACK_BIAS); | |
210 __ stxfsr(SP, fsr_offset+STACK_BIAS); | |
211 | |
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212 // Save all the FP registers: 32 doubles (32 floats correspond to the 2 halves of the first 16 doubles) |
0 | 213 int offset = d00_offset; |
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214 for( int i=0; i<FloatRegisterImpl::number_of_registers; i+=2 ) { |
0 | 215 FloatRegister f = as_FloatRegister(i); |
216 __ stf(FloatRegisterImpl::D, f, SP, offset+STACK_BIAS); | |
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217 // Record as callee saved both halves of double registers (2 float registers). |
0 | 218 map->set_callee_saved(VMRegImpl::stack2reg(offset>>2), f->as_VMReg()); |
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219 map->set_callee_saved(VMRegImpl::stack2reg((offset + sizeof(float))>>2), f->as_VMReg()->next()); |
0 | 220 offset += sizeof(double); |
221 } | |
222 | |
223 // And we're done. | |
224 | |
225 return map; | |
226 } | |
227 | |
228 | |
229 // Pop the current frame and restore all the registers that we | |
230 // saved. | |
231 void RegisterSaver::restore_live_registers(MacroAssembler* masm) { | |
232 | |
233 // Restore all the FP registers | |
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234 for( int i=0; i<FloatRegisterImpl::number_of_registers; i+=2 ) { |
0 | 235 __ ldf(FloatRegisterImpl::D, SP, d00_offset+i*sizeof(float)+STACK_BIAS, as_FloatRegister(i)); |
236 } | |
237 | |
238 __ ldx(SP, ccr_offset+STACK_BIAS, G1); | |
239 __ wrccr (G1) ; | |
240 | |
241 // Restore the G's | |
242 // Note that G2 (AKA GThread) must be saved and restored separately. | |
243 // TODO-FIXME: save and restore some of the other ASRs, viz., %asi and %gsr. | |
244 | |
245 __ ldx(SP, g1_offset+STACK_BIAS, G1); | |
246 __ ldx(SP, g3_offset+STACK_BIAS, G3); | |
247 __ ldx(SP, g4_offset+STACK_BIAS, G4); | |
248 __ ldx(SP, g5_offset+STACK_BIAS, G5); | |
249 | |
250 | |
251 #if !defined(_LP64) | |
252 // Restore the 64-bit O's. | |
253 __ ldx(SP, o0_offset+STACK_BIAS, O0); | |
254 __ ldx(SP, o1_offset+STACK_BIAS, O1); | |
255 __ ldx(SP, o2_offset+STACK_BIAS, O2); | |
256 __ ldx(SP, o3_offset+STACK_BIAS, O3); | |
257 __ ldx(SP, o4_offset+STACK_BIAS, O4); | |
258 __ ldx(SP, o5_offset+STACK_BIAS, O5); | |
259 | |
260 // And temporarily place them in TLS | |
261 | |
262 __ stx(O0, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8); | |
263 __ stx(O1, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8); | |
264 __ stx(O2, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+2*8); | |
265 __ stx(O3, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+3*8); | |
266 __ stx(O4, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+4*8); | |
267 __ stx(O5, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+5*8); | |
268 #endif /* _LP64 */ | |
269 | |
270 // Restore flags | |
271 | |
272 __ ldxfsr(SP, fsr_offset+STACK_BIAS); | |
273 | |
274 __ restore(); | |
275 | |
276 #if !defined(_LP64) | |
277 // Now reload the 64bit Oregs after we've restore the window. | |
278 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8, O0); | |
279 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8, O1); | |
280 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+2*8, O2); | |
281 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+3*8, O3); | |
282 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+4*8, O4); | |
283 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+5*8, O5); | |
284 #endif /* _LP64 */ | |
285 | |
286 } | |
287 | |
288 // Pop the current frame and restore the registers that might be holding | |
289 // a result. | |
290 void RegisterSaver::restore_result_registers(MacroAssembler* masm) { | |
291 | |
292 #if !defined(_LP64) | |
293 // 32bit build returns longs in G1 | |
294 __ ldx(SP, g1_offset+STACK_BIAS, G1); | |
295 | |
296 // Retrieve the 64-bit O's. | |
297 __ ldx(SP, o0_offset+STACK_BIAS, O0); | |
298 __ ldx(SP, o1_offset+STACK_BIAS, O1); | |
299 // and save to TLS | |
300 __ stx(O0, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8); | |
301 __ stx(O1, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8); | |
302 #endif /* _LP64 */ | |
303 | |
304 __ ldf(FloatRegisterImpl::D, SP, d00_offset+STACK_BIAS, as_FloatRegister(0)); | |
305 | |
306 __ restore(); | |
307 | |
308 #if !defined(_LP64) | |
309 // Now reload the 64bit Oregs after we've restore the window. | |
310 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8, O0); | |
311 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8, O1); | |
312 #endif /* _LP64 */ | |
313 | |
314 } | |
315 | |
316 // The java_calling_convention describes stack locations as ideal slots on | |
317 // a frame with no abi restrictions. Since we must observe abi restrictions | |
318 // (like the placement of the register window) the slots must be biased by | |
319 // the following value. | |
320 static int reg2offset(VMReg r) { | |
321 return (r->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size; | |
322 } | |
323 | |
324 // --------------------------------------------------------------------------- | |
325 // Read the array of BasicTypes from a signature, and compute where the | |
326 // arguments should go. Values in the VMRegPair regs array refer to 4-byte (VMRegImpl::stack_slot_size) | |
327 // quantities. Values less than VMRegImpl::stack0 are registers, those above | |
328 // refer to 4-byte stack slots. All stack slots are based off of the window | |
329 // top. VMRegImpl::stack0 refers to the first slot past the 16-word window, | |
330 // and VMRegImpl::stack0+1 refers to the memory word 4-byes higher. Register | |
331 // values 0-63 (up to RegisterImpl::number_of_registers) are the 64-bit | |
332 // integer registers. Values 64-95 are the (32-bit only) float registers. | |
333 // Each 32-bit quantity is given its own number, so the integer registers | |
334 // (in either 32- or 64-bit builds) use 2 numbers. For example, there is | |
335 // an O0-low and an O0-high. Essentially, all int register numbers are doubled. | |
336 | |
337 // Register results are passed in O0-O5, for outgoing call arguments. To | |
338 // convert to incoming arguments, convert all O's to I's. The regs array | |
339 // refer to the low and hi 32-bit words of 64-bit registers or stack slots. | |
340 // If the regs[].second() field is set to VMRegImpl::Bad(), it means it's unused (a | |
341 // 32-bit value was passed). If both are VMRegImpl::Bad(), it means no value was | |
342 // passed (used as a placeholder for the other half of longs and doubles in | |
343 // the 64-bit build). regs[].second() is either VMRegImpl::Bad() or regs[].second() is | |
344 // regs[].first()+1 (regs[].first() may be misaligned in the C calling convention). | |
345 // Sparc never passes a value in regs[].second() but not regs[].first() (regs[].first() | |
346 // == VMRegImpl::Bad() && regs[].second() != VMRegImpl::Bad()) nor unrelated values in the | |
347 // same VMRegPair. | |
348 | |
349 // Note: the INPUTS in sig_bt are in units of Java argument words, which are | |
350 // either 32-bit or 64-bit depending on the build. The OUTPUTS are in 32-bit | |
351 // units regardless of build. | |
352 | |
353 | |
354 // --------------------------------------------------------------------------- | |
355 // The compiled Java calling convention. The Java convention always passes | |
356 // 64-bit values in adjacent aligned locations (either registers or stack), | |
357 // floats in float registers and doubles in aligned float pairs. Values are | |
358 // packed in the registers. There is no backing varargs store for values in | |
359 // registers. In the 32-bit build, longs are passed in G1 and G4 (cannot be | |
360 // passed in I's, because longs in I's get their heads chopped off at | |
361 // interrupt). | |
362 int SharedRuntime::java_calling_convention(const BasicType *sig_bt, | |
363 VMRegPair *regs, | |
364 int total_args_passed, | |
365 int is_outgoing) { | |
366 assert(F31->as_VMReg()->is_reg(), "overlapping stack/register numbers"); | |
367 | |
368 // Convention is to pack the first 6 int/oop args into the first 6 registers | |
369 // (I0-I5), extras spill to the stack. Then pack the first 8 float args | |
370 // into F0-F7, extras spill to the stack. Then pad all register sets to | |
371 // align. Then put longs and doubles into the same registers as they fit, | |
372 // else spill to the stack. | |
373 const int int_reg_max = SPARC_ARGS_IN_REGS_NUM; | |
374 const int flt_reg_max = 8; | |
375 // | |
376 // Where 32-bit 1-reg longs start being passed | |
377 // In tiered we must pass on stack because c1 can't use a "pair" in a single reg. | |
378 // So make it look like we've filled all the G regs that c2 wants to use. | |
379 Register g_reg = TieredCompilation ? noreg : G1; | |
380 | |
381 // Count int/oop and float args. See how many stack slots we'll need and | |
382 // where the longs & doubles will go. | |
383 int int_reg_cnt = 0; | |
384 int flt_reg_cnt = 0; | |
385 // int stk_reg_pairs = frame::register_save_words*(wordSize>>2); | |
386 // int stk_reg_pairs = SharedRuntime::out_preserve_stack_slots(); | |
387 int stk_reg_pairs = 0; | |
388 for (int i = 0; i < total_args_passed; i++) { | |
389 switch (sig_bt[i]) { | |
390 case T_LONG: // LP64, longs compete with int args | |
391 assert(sig_bt[i+1] == T_VOID, ""); | |
392 #ifdef _LP64 | |
393 if (int_reg_cnt < int_reg_max) int_reg_cnt++; | |
394 #endif | |
395 break; | |
396 case T_OBJECT: | |
397 case T_ARRAY: | |
398 case T_ADDRESS: // Used, e.g., in slow-path locking for the lock's stack address | |
399 if (int_reg_cnt < int_reg_max) int_reg_cnt++; | |
400 #ifndef _LP64 | |
401 else stk_reg_pairs++; | |
402 #endif | |
403 break; | |
404 case T_INT: | |
405 case T_SHORT: | |
406 case T_CHAR: | |
407 case T_BYTE: | |
408 case T_BOOLEAN: | |
409 if (int_reg_cnt < int_reg_max) int_reg_cnt++; | |
410 else stk_reg_pairs++; | |
411 break; | |
412 case T_FLOAT: | |
413 if (flt_reg_cnt < flt_reg_max) flt_reg_cnt++; | |
414 else stk_reg_pairs++; | |
415 break; | |
416 case T_DOUBLE: | |
417 assert(sig_bt[i+1] == T_VOID, ""); | |
418 break; | |
419 case T_VOID: | |
420 break; | |
421 default: | |
422 ShouldNotReachHere(); | |
423 } | |
424 } | |
425 | |
426 // This is where the longs/doubles start on the stack. | |
427 stk_reg_pairs = (stk_reg_pairs+1) & ~1; // Round | |
428 | |
429 int int_reg_pairs = (int_reg_cnt+1) & ~1; // 32-bit 2-reg longs only | |
430 int flt_reg_pairs = (flt_reg_cnt+1) & ~1; | |
431 | |
432 // int stk_reg = frame::register_save_words*(wordSize>>2); | |
433 // int stk_reg = SharedRuntime::out_preserve_stack_slots(); | |
434 int stk_reg = 0; | |
435 int int_reg = 0; | |
436 int flt_reg = 0; | |
437 | |
438 // Now do the signature layout | |
439 for (int i = 0; i < total_args_passed; i++) { | |
440 switch (sig_bt[i]) { | |
441 case T_INT: | |
442 case T_SHORT: | |
443 case T_CHAR: | |
444 case T_BYTE: | |
445 case T_BOOLEAN: | |
446 #ifndef _LP64 | |
447 case T_OBJECT: | |
448 case T_ARRAY: | |
449 case T_ADDRESS: // Used, e.g., in slow-path locking for the lock's stack address | |
450 #endif // _LP64 | |
451 if (int_reg < int_reg_max) { | |
452 Register r = is_outgoing ? as_oRegister(int_reg++) : as_iRegister(int_reg++); | |
453 regs[i].set1(r->as_VMReg()); | |
454 } else { | |
455 regs[i].set1(VMRegImpl::stack2reg(stk_reg++)); | |
456 } | |
457 break; | |
458 | |
459 #ifdef _LP64 | |
460 case T_OBJECT: | |
461 case T_ARRAY: | |
462 case T_ADDRESS: // Used, e.g., in slow-path locking for the lock's stack address | |
463 if (int_reg < int_reg_max) { | |
464 Register r = is_outgoing ? as_oRegister(int_reg++) : as_iRegister(int_reg++); | |
465 regs[i].set2(r->as_VMReg()); | |
466 } else { | |
467 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
468 stk_reg_pairs += 2; | |
469 } | |
470 break; | |
471 #endif // _LP64 | |
472 | |
473 case T_LONG: | |
474 assert(sig_bt[i+1] == T_VOID, "expecting VOID in other half"); | |
475 #ifdef _LP64 | |
476 if (int_reg < int_reg_max) { | |
477 Register r = is_outgoing ? as_oRegister(int_reg++) : as_iRegister(int_reg++); | |
478 regs[i].set2(r->as_VMReg()); | |
479 } else { | |
480 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
481 stk_reg_pairs += 2; | |
482 } | |
483 #else | |
304 | 484 #ifdef COMPILER2 |
0 | 485 // For 32-bit build, can't pass longs in O-regs because they become |
486 // I-regs and get trashed. Use G-regs instead. G1 and G4 are almost | |
487 // spare and available. This convention isn't used by the Sparc ABI or | |
488 // anywhere else. If we're tiered then we don't use G-regs because c1 | |
304 | 489 // can't deal with them as a "pair". (Tiered makes this code think g's are filled) |
0 | 490 // G0: zero |
491 // G1: 1st Long arg | |
492 // G2: global allocated to TLS | |
493 // G3: used in inline cache check | |
494 // G4: 2nd Long arg | |
495 // G5: used in inline cache check | |
496 // G6: used by OS | |
497 // G7: used by OS | |
498 | |
499 if (g_reg == G1) { | |
500 regs[i].set2(G1->as_VMReg()); // This long arg in G1 | |
501 g_reg = G4; // Where the next arg goes | |
502 } else if (g_reg == G4) { | |
503 regs[i].set2(G4->as_VMReg()); // The 2nd long arg in G4 | |
504 g_reg = noreg; // No more longs in registers | |
505 } else { | |
506 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
507 stk_reg_pairs += 2; | |
508 } | |
509 #else // COMPILER2 | |
510 if (int_reg_pairs + 1 < int_reg_max) { | |
511 if (is_outgoing) { | |
512 regs[i].set_pair(as_oRegister(int_reg_pairs + 1)->as_VMReg(), as_oRegister(int_reg_pairs)->as_VMReg()); | |
513 } else { | |
514 regs[i].set_pair(as_iRegister(int_reg_pairs + 1)->as_VMReg(), as_iRegister(int_reg_pairs)->as_VMReg()); | |
515 } | |
516 int_reg_pairs += 2; | |
517 } else { | |
518 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
519 stk_reg_pairs += 2; | |
520 } | |
521 #endif // COMPILER2 | |
304 | 522 #endif // _LP64 |
0 | 523 break; |
524 | |
525 case T_FLOAT: | |
526 if (flt_reg < flt_reg_max) regs[i].set1(as_FloatRegister(flt_reg++)->as_VMReg()); | |
527 else regs[i].set1( VMRegImpl::stack2reg(stk_reg++)); | |
528 break; | |
529 case T_DOUBLE: | |
530 assert(sig_bt[i+1] == T_VOID, "expecting half"); | |
531 if (flt_reg_pairs + 1 < flt_reg_max) { | |
532 regs[i].set2(as_FloatRegister(flt_reg_pairs)->as_VMReg()); | |
533 flt_reg_pairs += 2; | |
534 } else { | |
535 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
536 stk_reg_pairs += 2; | |
537 } | |
538 break; | |
539 case T_VOID: regs[i].set_bad(); break; // Halves of longs & doubles | |
540 default: | |
541 ShouldNotReachHere(); | |
542 } | |
543 } | |
544 | |
545 // retun the amount of stack space these arguments will need. | |
546 return stk_reg_pairs; | |
547 | |
548 } | |
549 | |
1006
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550 // Helper class mostly to avoid passing masm everywhere, and handle |
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551 // store displacement overflow logic. |
0 | 552 class AdapterGenerator { |
553 MacroAssembler *masm; | |
554 Register Rdisp; | |
555 void set_Rdisp(Register r) { Rdisp = r; } | |
556 | |
557 void patch_callers_callsite(); | |
558 | |
559 // base+st_off points to top of argument | |
1506 | 560 int arg_offset(const int st_off) { return st_off; } |
0 | 561 int next_arg_offset(const int st_off) { |
1506 | 562 return st_off - Interpreter::stackElementSize; |
1006
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563 } |
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564 |
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565 // Argument slot values may be loaded first into a register because |
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566 // they might not fit into displacement. |
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567 RegisterOrConstant arg_slot(const int st_off); |
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568 RegisterOrConstant next_arg_slot(const int st_off); |
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569 |
0 | 570 // Stores long into offset pointed to by base |
571 void store_c2i_long(Register r, Register base, | |
572 const int st_off, bool is_stack); | |
573 void store_c2i_object(Register r, Register base, | |
574 const int st_off); | |
575 void store_c2i_int(Register r, Register base, | |
576 const int st_off); | |
577 void store_c2i_double(VMReg r_2, | |
578 VMReg r_1, Register base, const int st_off); | |
579 void store_c2i_float(FloatRegister f, Register base, | |
580 const int st_off); | |
581 | |
582 public: | |
583 void gen_c2i_adapter(int total_args_passed, | |
584 // VMReg max_arg, | |
585 int comp_args_on_stack, // VMRegStackSlots | |
586 const BasicType *sig_bt, | |
587 const VMRegPair *regs, | |
588 Label& skip_fixup); | |
589 void gen_i2c_adapter(int total_args_passed, | |
590 // VMReg max_arg, | |
591 int comp_args_on_stack, // VMRegStackSlots | |
592 const BasicType *sig_bt, | |
593 const VMRegPair *regs); | |
594 | |
595 AdapterGenerator(MacroAssembler *_masm) : masm(_masm) {} | |
596 }; | |
597 | |
598 | |
599 // Patch the callers callsite with entry to compiled code if it exists. | |
600 void AdapterGenerator::patch_callers_callsite() { | |
601 Label L; | |
602 __ ld_ptr(G5_method, in_bytes(methodOopDesc::code_offset()), G3_scratch); | |
3839 | 603 __ br_null(G3_scratch, false, Assembler::pt, L); |
0 | 604 // Schedule the branch target address early. |
605 __ delayed()->ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), G3_scratch); | |
606 // Call into the VM to patch the caller, then jump to compiled callee | |
607 __ save_frame(4); // Args in compiled layout; do not blow them | |
608 | |
609 // Must save all the live Gregs the list is: | |
610 // G1: 1st Long arg (32bit build) | |
611 // G2: global allocated to TLS | |
612 // G3: used in inline cache check (scratch) | |
613 // G4: 2nd Long arg (32bit build); | |
614 // G5: used in inline cache check (methodOop) | |
615 | |
616 // The longs must go to the stack by hand since in the 32 bit build they can be trashed by window ops. | |
617 | |
618 #ifdef _LP64 | |
619 // mov(s,d) | |
620 __ mov(G1, L1); | |
621 __ mov(G4, L4); | |
622 __ mov(G5_method, L5); | |
623 __ mov(G5_method, O0); // VM needs target method | |
624 __ mov(I7, O1); // VM needs caller's callsite | |
625 // Must be a leaf call... | |
626 // can be very far once the blob has been relocated | |
727 | 627 AddressLiteral dest(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite)); |
0 | 628 __ relocate(relocInfo::runtime_call_type); |
727 | 629 __ jumpl_to(dest, O7, O7); |
0 | 630 __ delayed()->mov(G2_thread, L7_thread_cache); |
631 __ mov(L7_thread_cache, G2_thread); | |
632 __ mov(L1, G1); | |
633 __ mov(L4, G4); | |
634 __ mov(L5, G5_method); | |
635 #else | |
636 __ stx(G1, FP, -8 + STACK_BIAS); | |
637 __ stx(G4, FP, -16 + STACK_BIAS); | |
638 __ mov(G5_method, L5); | |
639 __ mov(G5_method, O0); // VM needs target method | |
640 __ mov(I7, O1); // VM needs caller's callsite | |
641 // Must be a leaf call... | |
642 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite), relocInfo::runtime_call_type); | |
643 __ delayed()->mov(G2_thread, L7_thread_cache); | |
644 __ mov(L7_thread_cache, G2_thread); | |
645 __ ldx(FP, -8 + STACK_BIAS, G1); | |
646 __ ldx(FP, -16 + STACK_BIAS, G4); | |
647 __ mov(L5, G5_method); | |
648 __ ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), G3_scratch); | |
649 #endif /* _LP64 */ | |
650 | |
651 __ restore(); // Restore args | |
652 __ bind(L); | |
653 } | |
654 | |
1006
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655 |
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656 RegisterOrConstant AdapterGenerator::arg_slot(const int st_off) { |
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657 RegisterOrConstant roc(arg_offset(st_off)); |
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658 return __ ensure_simm13_or_reg(roc, Rdisp); |
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659 } |
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660 |
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661 RegisterOrConstant AdapterGenerator::next_arg_slot(const int st_off) { |
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662 RegisterOrConstant roc(next_arg_offset(st_off)); |
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663 return __ ensure_simm13_or_reg(roc, Rdisp); |
0 | 664 } |
665 | |
1006
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666 |
0 | 667 // Stores long into offset pointed to by base |
668 void AdapterGenerator::store_c2i_long(Register r, Register base, | |
669 const int st_off, bool is_stack) { | |
670 #ifdef _LP64 | |
671 // In V9, longs are given 2 64-bit slots in the interpreter, but the | |
672 // data is passed in only 1 slot. | |
673 __ stx(r, base, next_arg_slot(st_off)); | |
674 #else | |
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675 #ifdef COMPILER2 |
0 | 676 // Misaligned store of 64-bit data |
677 __ stw(r, base, arg_slot(st_off)); // lo bits | |
678 __ srlx(r, 32, r); | |
679 __ stw(r, base, next_arg_slot(st_off)); // hi bits | |
680 #else | |
681 if (is_stack) { | |
682 // Misaligned store of 64-bit data | |
683 __ stw(r, base, arg_slot(st_off)); // lo bits | |
684 __ srlx(r, 32, r); | |
685 __ stw(r, base, next_arg_slot(st_off)); // hi bits | |
686 } else { | |
687 __ stw(r->successor(), base, arg_slot(st_off) ); // lo bits | |
688 __ stw(r , base, next_arg_slot(st_off)); // hi bits | |
689 } | |
690 #endif // COMPILER2 | |
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691 #endif // _LP64 |
0 | 692 } |
693 | |
694 void AdapterGenerator::store_c2i_object(Register r, Register base, | |
695 const int st_off) { | |
696 __ st_ptr (r, base, arg_slot(st_off)); | |
697 } | |
698 | |
699 void AdapterGenerator::store_c2i_int(Register r, Register base, | |
700 const int st_off) { | |
701 __ st (r, base, arg_slot(st_off)); | |
702 } | |
703 | |
704 // Stores into offset pointed to by base | |
705 void AdapterGenerator::store_c2i_double(VMReg r_2, | |
706 VMReg r_1, Register base, const int st_off) { | |
707 #ifdef _LP64 | |
708 // In V9, doubles are given 2 64-bit slots in the interpreter, but the | |
709 // data is passed in only 1 slot. | |
710 __ stf(FloatRegisterImpl::D, r_1->as_FloatRegister(), base, next_arg_slot(st_off)); | |
711 #else | |
712 // Need to marshal 64-bit value from misaligned Lesp loads | |
713 __ stf(FloatRegisterImpl::S, r_1->as_FloatRegister(), base, next_arg_slot(st_off)); | |
714 __ stf(FloatRegisterImpl::S, r_2->as_FloatRegister(), base, arg_slot(st_off) ); | |
715 #endif | |
716 } | |
717 | |
718 void AdapterGenerator::store_c2i_float(FloatRegister f, Register base, | |
719 const int st_off) { | |
720 __ stf(FloatRegisterImpl::S, f, base, arg_slot(st_off)); | |
721 } | |
722 | |
723 void AdapterGenerator::gen_c2i_adapter( | |
724 int total_args_passed, | |
725 // VMReg max_arg, | |
726 int comp_args_on_stack, // VMRegStackSlots | |
727 const BasicType *sig_bt, | |
728 const VMRegPair *regs, | |
729 Label& skip_fixup) { | |
730 | |
731 // Before we get into the guts of the C2I adapter, see if we should be here | |
732 // at all. We've come from compiled code and are attempting to jump to the | |
733 // interpreter, which means the caller made a static call to get here | |
734 // (vcalls always get a compiled target if there is one). Check for a | |
735 // compiled target. If there is one, we need to patch the caller's call. | |
736 // However we will run interpreted if we come thru here. The next pass | |
737 // thru the call site will run compiled. If we ran compiled here then | |
738 // we can (theorectically) do endless i2c->c2i->i2c transitions during | |
739 // deopt/uncommon trap cycles. If we always go interpreted here then | |
740 // we can have at most one and don't need to play any tricks to keep | |
741 // from endlessly growing the stack. | |
742 // | |
743 // Actually if we detected that we had an i2c->c2i transition here we | |
744 // ought to be able to reset the world back to the state of the interpreted | |
745 // call and not bother building another interpreter arg area. We don't | |
746 // do that at this point. | |
747 | |
748 patch_callers_callsite(); | |
749 | |
750 __ bind(skip_fixup); | |
751 | |
752 // Since all args are passed on the stack, total_args_passed*wordSize is the | |
753 // space we need. Add in varargs area needed by the interpreter. Round up | |
754 // to stack alignment. | |
1506 | 755 const int arg_size = total_args_passed * Interpreter::stackElementSize; |
0 | 756 const int varargs_area = |
757 (frame::varargs_offset - frame::register_save_words)*wordSize; | |
758 const int extraspace = round_to(arg_size + varargs_area, 2*wordSize); | |
759 | |
760 int bias = STACK_BIAS; | |
761 const int interp_arg_offset = frame::varargs_offset*wordSize + | |
1506 | 762 (total_args_passed-1)*Interpreter::stackElementSize; |
0 | 763 |
764 Register base = SP; | |
765 | |
766 #ifdef _LP64 | |
767 // In the 64bit build because of wider slots and STACKBIAS we can run | |
768 // out of bits in the displacement to do loads and stores. Use g3 as | |
769 // temporary displacement. | |
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770 if (!Assembler::is_simm13(extraspace)) { |
0 | 771 __ set(extraspace, G3_scratch); |
772 __ sub(SP, G3_scratch, SP); | |
773 } else { | |
774 __ sub(SP, extraspace, SP); | |
775 } | |
776 set_Rdisp(G3_scratch); | |
777 #else | |
778 __ sub(SP, extraspace, SP); | |
779 #endif // _LP64 | |
780 | |
781 // First write G1 (if used) to where ever it must go | |
782 for (int i=0; i<total_args_passed; i++) { | |
1506 | 783 const int st_off = interp_arg_offset - (i*Interpreter::stackElementSize) + bias; |
0 | 784 VMReg r_1 = regs[i].first(); |
785 VMReg r_2 = regs[i].second(); | |
786 if (r_1 == G1_scratch->as_VMReg()) { | |
787 if (sig_bt[i] == T_OBJECT || sig_bt[i] == T_ARRAY) { | |
788 store_c2i_object(G1_scratch, base, st_off); | |
789 } else if (sig_bt[i] == T_LONG) { | |
790 assert(!TieredCompilation, "should not use register args for longs"); | |
791 store_c2i_long(G1_scratch, base, st_off, false); | |
792 } else { | |
793 store_c2i_int(G1_scratch, base, st_off); | |
794 } | |
795 } | |
796 } | |
797 | |
798 // Now write the args into the outgoing interpreter space | |
799 for (int i=0; i<total_args_passed; i++) { | |
1506 | 800 const int st_off = interp_arg_offset - (i*Interpreter::stackElementSize) + bias; |
0 | 801 VMReg r_1 = regs[i].first(); |
802 VMReg r_2 = regs[i].second(); | |
803 if (!r_1->is_valid()) { | |
804 assert(!r_2->is_valid(), ""); | |
805 continue; | |
806 } | |
807 // Skip G1 if found as we did it first in order to free it up | |
808 if (r_1 == G1_scratch->as_VMReg()) { | |
809 continue; | |
810 } | |
811 #ifdef ASSERT | |
812 bool G1_forced = false; | |
813 #endif // ASSERT | |
814 if (r_1->is_stack()) { // Pretend stack targets are loaded into G1 | |
815 #ifdef _LP64 | |
816 Register ld_off = Rdisp; | |
817 __ set(reg2offset(r_1) + extraspace + bias, ld_off); | |
818 #else | |
819 int ld_off = reg2offset(r_1) + extraspace + bias; | |
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820 #endif // _LP64 |
0 | 821 #ifdef ASSERT |
822 G1_forced = true; | |
823 #endif // ASSERT | |
824 r_1 = G1_scratch->as_VMReg();// as part of the load/store shuffle | |
825 if (!r_2->is_valid()) __ ld (base, ld_off, G1_scratch); | |
826 else __ ldx(base, ld_off, G1_scratch); | |
827 } | |
828 | |
829 if (r_1->is_Register()) { | |
830 Register r = r_1->as_Register()->after_restore(); | |
831 if (sig_bt[i] == T_OBJECT || sig_bt[i] == T_ARRAY) { | |
832 store_c2i_object(r, base, st_off); | |
833 } else if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
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834 #ifndef _LP64 |
0 | 835 if (TieredCompilation) { |
836 assert(G1_forced || sig_bt[i] != T_LONG, "should not use register args for longs"); | |
837 } | |
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838 #endif // _LP64 |
0 | 839 store_c2i_long(r, base, st_off, r_2->is_stack()); |
840 } else { | |
841 store_c2i_int(r, base, st_off); | |
842 } | |
843 } else { | |
844 assert(r_1->is_FloatRegister(), ""); | |
845 if (sig_bt[i] == T_FLOAT) { | |
846 store_c2i_float(r_1->as_FloatRegister(), base, st_off); | |
847 } else { | |
848 assert(sig_bt[i] == T_DOUBLE, "wrong type"); | |
849 store_c2i_double(r_2, r_1, base, st_off); | |
850 } | |
851 } | |
852 } | |
853 | |
854 #ifdef _LP64 | |
855 // Need to reload G3_scratch, used for temporary displacements. | |
856 __ ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), G3_scratch); | |
857 | |
858 // Pass O5_savedSP as an argument to the interpreter. | |
859 // The interpreter will restore SP to this value before returning. | |
860 __ set(extraspace, G1); | |
861 __ add(SP, G1, O5_savedSP); | |
862 #else | |
863 // Pass O5_savedSP as an argument to the interpreter. | |
864 // The interpreter will restore SP to this value before returning. | |
865 __ add(SP, extraspace, O5_savedSP); | |
866 #endif // _LP64 | |
867 | |
868 __ mov((frame::varargs_offset)*wordSize - | |
1506 | 869 1*Interpreter::stackElementSize+bias+BytesPerWord, G1); |
0 | 870 // Jump to the interpreter just as if interpreter was doing it. |
871 __ jmpl(G3_scratch, 0, G0); | |
872 // Setup Lesp for the call. Cannot actually set Lesp as the current Lesp | |
873 // (really L0) is in use by the compiled frame as a generic temp. However, | |
874 // the interpreter does not know where its args are without some kind of | |
875 // arg pointer being passed in. Pass it in Gargs. | |
876 __ delayed()->add(SP, G1, Gargs); | |
877 } | |
878 | |
879 void AdapterGenerator::gen_i2c_adapter( | |
880 int total_args_passed, | |
881 // VMReg max_arg, | |
882 int comp_args_on_stack, // VMRegStackSlots | |
883 const BasicType *sig_bt, | |
884 const VMRegPair *regs) { | |
885 | |
886 // Generate an I2C adapter: adjust the I-frame to make space for the C-frame | |
887 // layout. Lesp was saved by the calling I-frame and will be restored on | |
888 // return. Meanwhile, outgoing arg space is all owned by the callee | |
889 // C-frame, so we can mangle it at will. After adjusting the frame size, | |
890 // hoist register arguments and repack other args according to the compiled | |
891 // code convention. Finally, end in a jump to the compiled code. The entry | |
892 // point address is the start of the buffer. | |
893 | |
894 // We will only enter here from an interpreted frame and never from after | |
895 // passing thru a c2i. Azul allowed this but we do not. If we lose the | |
896 // race and use a c2i we will remain interpreted for the race loser(s). | |
897 // This removes all sorts of headaches on the x86 side and also eliminates | |
898 // the possibility of having c2i -> i2c -> c2i -> ... endless transitions. | |
899 | |
900 // As you can see from the list of inputs & outputs there are not a lot | |
901 // of temp registers to work with: mostly G1, G3 & G4. | |
902 | |
903 // Inputs: | |
904 // G2_thread - TLS | |
905 // G5_method - Method oop | |
710 | 906 // G4 (Gargs) - Pointer to interpreter's args |
907 // O0..O4 - free for scratch | |
908 // O5_savedSP - Caller's saved SP, to be restored if needed | |
0 | 909 // O6 - Current SP! |
910 // O7 - Valid return address | |
710 | 911 // L0-L7, I0-I7 - Caller's temps (no frame pushed yet) |
0 | 912 |
913 // Outputs: | |
914 // G2_thread - TLS | |
915 // G1, G4 - Outgoing long args in 32-bit build | |
916 // O0-O5 - Outgoing args in compiled layout | |
917 // O6 - Adjusted or restored SP | |
918 // O7 - Valid return address | |
1564 | 919 // L0-L7, I0-I7 - Caller's temps (no frame pushed yet) |
0 | 920 // F0-F7 - more outgoing args |
921 | |
922 | |
710 | 923 // Gargs is the incoming argument base, and also an outgoing argument. |
0 | 924 __ sub(Gargs, BytesPerWord, Gargs); |
925 | |
926 // ON ENTRY TO THE CODE WE ARE MAKING, WE HAVE AN INTERPRETED FRAME | |
927 // WITH O7 HOLDING A VALID RETURN PC | |
928 // | |
929 // | | | |
930 // : java stack : | |
931 // | | | |
932 // +--------------+ <--- start of outgoing args | |
933 // | receiver | | | |
934 // : rest of args : |---size is java-arg-words | |
935 // | | | | |
936 // +--------------+ <--- O4_args (misaligned) and Lesp if prior is not C2I | |
937 // | | | | |
938 // : unused : |---Space for max Java stack, plus stack alignment | |
939 // | | | | |
940 // +--------------+ <--- SP + 16*wordsize | |
941 // | | | |
942 // : window : | |
943 // | | | |
944 // +--------------+ <--- SP | |
945 | |
946 // WE REPACK THE STACK. We use the common calling convention layout as | |
947 // discovered by calling SharedRuntime::calling_convention. We assume it | |
948 // causes an arbitrary shuffle of memory, which may require some register | |
949 // temps to do the shuffle. We hope for (and optimize for) the case where | |
950 // temps are not needed. We may have to resize the stack slightly, in case | |
951 // we need alignment padding (32-bit interpreter can pass longs & doubles | |
952 // misaligned, but the compilers expect them aligned). | |
953 // | |
954 // | | | |
955 // : java stack : | |
956 // | | | |
957 // +--------------+ <--- start of outgoing args | |
958 // | pad, align | | | |
959 // +--------------+ | | |
960 // | ints, floats | |---Outgoing stack args, packed low. | |
961 // +--------------+ | First few args in registers. | |
962 // : doubles : | | |
963 // | longs | | | |
964 // +--------------+ <--- SP' + 16*wordsize | |
965 // | | | |
966 // : window : | |
967 // | | | |
968 // +--------------+ <--- SP' | |
969 | |
970 // ON EXIT FROM THE CODE WE ARE MAKING, WE STILL HAVE AN INTERPRETED FRAME | |
971 // WITH O7 HOLDING A VALID RETURN PC - ITS JUST THAT THE ARGS ARE NOW SETUP | |
972 // FOR COMPILED CODE AND THE FRAME SLIGHTLY GROWN. | |
973 | |
974 // Cut-out for having no stack args. Since up to 6 args are passed | |
975 // in registers, we will commonly have no stack args. | |
976 if (comp_args_on_stack > 0) { | |
977 | |
978 // Convert VMReg stack slots to words. | |
979 int comp_words_on_stack = round_to(comp_args_on_stack*VMRegImpl::stack_slot_size, wordSize)>>LogBytesPerWord; | |
980 // Round up to miminum stack alignment, in wordSize | |
981 comp_words_on_stack = round_to(comp_words_on_stack, 2); | |
982 // Now compute the distance from Lesp to SP. This calculation does not | |
983 // include the space for total_args_passed because Lesp has not yet popped | |
984 // the arguments. | |
985 __ sub(SP, (comp_words_on_stack)*wordSize, SP); | |
986 } | |
987 | |
988 // Will jump to the compiled code just as if compiled code was doing it. | |
989 // Pre-load the register-jump target early, to schedule it better. | |
990 __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3); | |
991 | |
992 // Now generate the shuffle code. Pick up all register args and move the | |
993 // rest through G1_scratch. | |
994 for (int i=0; i<total_args_passed; i++) { | |
995 if (sig_bt[i] == T_VOID) { | |
996 // Longs and doubles are passed in native word order, but misaligned | |
997 // in the 32-bit build. | |
998 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
999 continue; | |
1000 } | |
1001 | |
1002 // Pick up 0, 1 or 2 words from Lesp+offset. Assume mis-aligned in the | |
1003 // 32-bit build and aligned in the 64-bit build. Look for the obvious | |
1004 // ldx/lddf optimizations. | |
1005 | |
1006 // Load in argument order going down. | |
1506 | 1007 const int ld_off = (total_args_passed-i)*Interpreter::stackElementSize; |
0 | 1008 set_Rdisp(G1_scratch); |
1009 | |
1010 VMReg r_1 = regs[i].first(); | |
1011 VMReg r_2 = regs[i].second(); | |
1012 if (!r_1->is_valid()) { | |
1013 assert(!r_2->is_valid(), ""); | |
1014 continue; | |
1015 } | |
1016 if (r_1->is_stack()) { // Pretend stack targets are loaded into F8/F9 | |
1017 r_1 = F8->as_VMReg(); // as part of the load/store shuffle | |
1018 if (r_2->is_valid()) r_2 = r_1->next(); | |
1019 } | |
1020 if (r_1->is_Register()) { // Register argument | |
1021 Register r = r_1->as_Register()->after_restore(); | |
1022 if (!r_2->is_valid()) { | |
1023 __ ld(Gargs, arg_slot(ld_off), r); | |
1024 } else { | |
1025 #ifdef _LP64 | |
1026 // In V9, longs are given 2 64-bit slots in the interpreter, but the | |
1027 // data is passed in only 1 slot. | |
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1028 RegisterOrConstant slot = (sig_bt[i] == T_LONG) ? |
0 | 1029 next_arg_slot(ld_off) : arg_slot(ld_off); |
1030 __ ldx(Gargs, slot, r); | |
1031 #else | |
1032 // Need to load a 64-bit value into G1/G4, but G1/G4 is being used in the | |
1033 // stack shuffle. Load the first 2 longs into G1/G4 later. | |
1034 #endif | |
1035 } | |
1036 } else { | |
1037 assert(r_1->is_FloatRegister(), ""); | |
1038 if (!r_2->is_valid()) { | |
1039 __ ldf(FloatRegisterImpl::S, Gargs, arg_slot(ld_off), r_1->as_FloatRegister()); | |
1040 } else { | |
1041 #ifdef _LP64 | |
1042 // In V9, doubles are given 2 64-bit slots in the interpreter, but the | |
1043 // data is passed in only 1 slot. This code also handles longs that | |
1044 // are passed on the stack, but need a stack-to-stack move through a | |
1045 // spare float register. | |
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1046 RegisterOrConstant slot = (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) ? |
0 | 1047 next_arg_slot(ld_off) : arg_slot(ld_off); |
1048 __ ldf(FloatRegisterImpl::D, Gargs, slot, r_1->as_FloatRegister()); | |
1049 #else | |
1050 // Need to marshal 64-bit value from misaligned Lesp loads | |
1051 __ ldf(FloatRegisterImpl::S, Gargs, next_arg_slot(ld_off), r_1->as_FloatRegister()); | |
1052 __ ldf(FloatRegisterImpl::S, Gargs, arg_slot(ld_off), r_2->as_FloatRegister()); | |
1053 #endif | |
1054 } | |
1055 } | |
1056 // Was the argument really intended to be on the stack, but was loaded | |
1057 // into F8/F9? | |
1058 if (regs[i].first()->is_stack()) { | |
1059 assert(r_1->as_FloatRegister() == F8, "fix this code"); | |
1060 // Convert stack slot to an SP offset | |
1061 int st_off = reg2offset(regs[i].first()) + STACK_BIAS; | |
1062 // Store down the shuffled stack word. Target address _is_ aligned. | |
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1063 RegisterOrConstant slot = __ ensure_simm13_or_reg(st_off, Rdisp); |
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1064 if (!r_2->is_valid()) __ stf(FloatRegisterImpl::S, r_1->as_FloatRegister(), SP, slot); |
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1065 else __ stf(FloatRegisterImpl::D, r_1->as_FloatRegister(), SP, slot); |
0 | 1066 } |
1067 } | |
1068 bool made_space = false; | |
1069 #ifndef _LP64 | |
1070 // May need to pick up a few long args in G1/G4 | |
1071 bool g4_crushed = false; | |
1072 bool g3_crushed = false; | |
1073 for (int i=0; i<total_args_passed; i++) { | |
1074 if (regs[i].first()->is_Register() && regs[i].second()->is_valid()) { | |
1075 // Load in argument order going down | |
1506 | 1076 int ld_off = (total_args_passed-i)*Interpreter::stackElementSize; |
0 | 1077 // Need to marshal 64-bit value from misaligned Lesp loads |
1078 Register r = regs[i].first()->as_Register()->after_restore(); | |
1079 if (r == G1 || r == G4) { | |
1080 assert(!g4_crushed, "ordering problem"); | |
1081 if (r == G4){ | |
1082 g4_crushed = true; | |
1083 __ lduw(Gargs, arg_slot(ld_off) , G3_scratch); // Load lo bits | |
1084 __ ld (Gargs, next_arg_slot(ld_off), r); // Load hi bits | |
1085 } else { | |
1086 // better schedule this way | |
1087 __ ld (Gargs, next_arg_slot(ld_off), r); // Load hi bits | |
1088 __ lduw(Gargs, arg_slot(ld_off) , G3_scratch); // Load lo bits | |
1089 } | |
1090 g3_crushed = true; | |
1091 __ sllx(r, 32, r); | |
1092 __ or3(G3_scratch, r, r); | |
1093 } else { | |
1094 assert(r->is_out(), "longs passed in two O registers"); | |
1095 __ ld (Gargs, arg_slot(ld_off) , r->successor()); // Load lo bits | |
1096 __ ld (Gargs, next_arg_slot(ld_off), r); // Load hi bits | |
1097 } | |
1098 } | |
1099 } | |
1100 #endif | |
1101 | |
1102 // Jump to the compiled code just as if compiled code was doing it. | |
1103 // | |
1104 #ifndef _LP64 | |
1105 if (g3_crushed) { | |
1106 // Rats load was wasted, at least it is in cache... | |
727 | 1107 __ ld_ptr(G5_method, methodOopDesc::from_compiled_offset(), G3); |
0 | 1108 } |
1109 #endif /* _LP64 */ | |
1110 | |
1111 // 6243940 We might end up in handle_wrong_method if | |
1112 // the callee is deoptimized as we race thru here. If that | |
1113 // happens we don't want to take a safepoint because the | |
1114 // caller frame will look interpreted and arguments are now | |
1115 // "compiled" so it is much better to make this transition | |
1116 // invisible to the stack walking code. Unfortunately if | |
1117 // we try and find the callee by normal means a safepoint | |
1118 // is possible. So we stash the desired callee in the thread | |
1119 // and the vm will find there should this case occur. | |
727 | 1120 Address callee_target_addr(G2_thread, JavaThread::callee_target_offset()); |
0 | 1121 __ st_ptr(G5_method, callee_target_addr); |
1122 | |
1123 if (StressNonEntrant) { | |
1124 // Open a big window for deopt failure | |
1125 __ save_frame(0); | |
1126 __ mov(G0, L0); | |
1127 Label loop; | |
1128 __ bind(loop); | |
1129 __ sub(L0, 1, L0); | |
3839 | 1130 __ br_null_short(L0, Assembler::pt, loop); |
0 | 1131 |
1132 __ restore(); | |
1133 } | |
1134 | |
1135 | |
1136 __ jmpl(G3, 0, G0); | |
1137 __ delayed()->nop(); | |
1138 } | |
1139 | |
1140 // --------------------------------------------------------------- | |
1141 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm, | |
1142 int total_args_passed, | |
1143 // VMReg max_arg, | |
1144 int comp_args_on_stack, // VMRegStackSlots | |
1145 const BasicType *sig_bt, | |
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1146 const VMRegPair *regs, |
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1147 AdapterFingerPrint* fingerprint) { |
0 | 1148 address i2c_entry = __ pc(); |
1149 | |
1150 AdapterGenerator agen(masm); | |
1151 | |
1152 agen.gen_i2c_adapter(total_args_passed, comp_args_on_stack, sig_bt, regs); | |
1153 | |
1154 | |
1155 // ------------------------------------------------------------------------- | |
1156 // Generate a C2I adapter. On entry we know G5 holds the methodOop. The | |
1157 // args start out packed in the compiled layout. They need to be unpacked | |
1158 // into the interpreter layout. This will almost always require some stack | |
1159 // space. We grow the current (compiled) stack, then repack the args. We | |
1160 // finally end in a jump to the generic interpreter entry point. On exit | |
1161 // from the interpreter, the interpreter will restore our SP (lest the | |
1162 // compiled code, which relys solely on SP and not FP, get sick). | |
1163 | |
1164 address c2i_unverified_entry = __ pc(); | |
1165 Label skip_fixup; | |
1166 { | |
1167 #if !defined(_LP64) && defined(COMPILER2) | |
1168 Register R_temp = L0; // another scratch register | |
1169 #else | |
1170 Register R_temp = G1; // another scratch register | |
1171 #endif | |
1172 | |
727 | 1173 AddressLiteral ic_miss(SharedRuntime::get_ic_miss_stub()); |
0 | 1174 |
1175 __ verify_oop(O0); | |
1176 __ verify_oop(G5_method); | |
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1177 __ load_klass(O0, G3_scratch); |
0 | 1178 __ verify_oop(G3_scratch); |
1179 | |
1180 #if !defined(_LP64) && defined(COMPILER2) | |
1181 __ save(SP, -frame::register_save_words*wordSize, SP); | |
1182 __ ld_ptr(G5_method, compiledICHolderOopDesc::holder_klass_offset(), R_temp); | |
1183 __ verify_oop(R_temp); | |
1184 __ cmp(G3_scratch, R_temp); | |
1185 __ restore(); | |
1186 #else | |
1187 __ ld_ptr(G5_method, compiledICHolderOopDesc::holder_klass_offset(), R_temp); | |
1188 __ verify_oop(R_temp); | |
1189 __ cmp(G3_scratch, R_temp); | |
1190 #endif | |
1191 | |
1192 Label ok, ok2; | |
1193 __ brx(Assembler::equal, false, Assembler::pt, ok); | |
1194 __ delayed()->ld_ptr(G5_method, compiledICHolderOopDesc::holder_method_offset(), G5_method); | |
727 | 1195 __ jump_to(ic_miss, G3_scratch); |
0 | 1196 __ delayed()->nop(); |
1197 | |
1198 __ bind(ok); | |
1199 // Method might have been compiled since the call site was patched to | |
1200 // interpreted if that is the case treat it as a miss so we can get | |
1201 // the call site corrected. | |
1202 __ ld_ptr(G5_method, in_bytes(methodOopDesc::code_offset()), G3_scratch); | |
1203 __ bind(ok2); | |
3839 | 1204 __ br_null(G3_scratch, false, Assembler::pt, skip_fixup); |
0 | 1205 __ delayed()->ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), G3_scratch); |
727 | 1206 __ jump_to(ic_miss, G3_scratch); |
0 | 1207 __ delayed()->nop(); |
1208 | |
1209 } | |
1210 | |
1211 address c2i_entry = __ pc(); | |
1212 | |
1213 agen.gen_c2i_adapter(total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup); | |
1214 | |
1215 __ flush(); | |
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1216 return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
0 | 1217 |
1218 } | |
1219 | |
1220 // Helper function for native calling conventions | |
1221 static VMReg int_stk_helper( int i ) { | |
1222 // Bias any stack based VMReg we get by ignoring the window area | |
1223 // but not the register parameter save area. | |
1224 // | |
1225 // This is strange for the following reasons. We'd normally expect | |
1226 // the calling convention to return an VMReg for a stack slot | |
1227 // completely ignoring any abi reserved area. C2 thinks of that | |
1228 // abi area as only out_preserve_stack_slots. This does not include | |
1229 // the area allocated by the C abi to store down integer arguments | |
1230 // because the java calling convention does not use it. So | |
1231 // since c2 assumes that there are only out_preserve_stack_slots | |
1232 // to bias the optoregs (which impacts VMRegs) when actually referencing any actual stack | |
1233 // location the c calling convention must add in this bias amount | |
1234 // to make up for the fact that the out_preserve_stack_slots is | |
1235 // insufficient for C calls. What a mess. I sure hope those 6 | |
1236 // stack words were worth it on every java call! | |
1237 | |
1238 // Another way of cleaning this up would be for out_preserve_stack_slots | |
1239 // to take a parameter to say whether it was C or java calling conventions. | |
1240 // Then things might look a little better (but not much). | |
1241 | |
1242 int mem_parm_offset = i - SPARC_ARGS_IN_REGS_NUM; | |
1243 if( mem_parm_offset < 0 ) { | |
1244 return as_oRegister(i)->as_VMReg(); | |
1245 } else { | |
1246 int actual_offset = (mem_parm_offset + frame::memory_parameter_word_sp_offset) * VMRegImpl::slots_per_word; | |
1247 // Now return a biased offset that will be correct when out_preserve_slots is added back in | |
1248 return VMRegImpl::stack2reg(actual_offset - SharedRuntime::out_preserve_stack_slots()); | |
1249 } | |
1250 } | |
1251 | |
1252 | |
1253 int SharedRuntime::c_calling_convention(const BasicType *sig_bt, | |
1254 VMRegPair *regs, | |
1255 int total_args_passed) { | |
1256 | |
1257 // Return the number of VMReg stack_slots needed for the args. | |
1258 // This value does not include an abi space (like register window | |
1259 // save area). | |
1260 | |
1261 // The native convention is V8 if !LP64 | |
1262 // The LP64 convention is the V9 convention which is slightly more sane. | |
1263 | |
1264 // We return the amount of VMReg stack slots we need to reserve for all | |
1265 // the arguments NOT counting out_preserve_stack_slots. Since we always | |
1266 // have space for storing at least 6 registers to memory we start with that. | |
1267 // See int_stk_helper for a further discussion. | |
1268 int max_stack_slots = (frame::varargs_offset * VMRegImpl::slots_per_word) - SharedRuntime::out_preserve_stack_slots(); | |
1269 | |
1270 #ifdef _LP64 | |
1271 // V9 convention: All things "as-if" on double-wide stack slots. | |
1272 // Hoist any int/ptr/long's in the first 6 to int regs. | |
1273 // Hoist any flt/dbl's in the first 16 dbl regs. | |
1274 int j = 0; // Count of actual args, not HALVES | |
1275 for( int i=0; i<total_args_passed; i++, j++ ) { | |
1276 switch( sig_bt[i] ) { | |
1277 case T_BOOLEAN: | |
1278 case T_BYTE: | |
1279 case T_CHAR: | |
1280 case T_INT: | |
1281 case T_SHORT: | |
1282 regs[i].set1( int_stk_helper( j ) ); break; | |
1283 case T_LONG: | |
1284 assert( sig_bt[i+1] == T_VOID, "expecting half" ); | |
1285 case T_ADDRESS: // raw pointers, like current thread, for VM calls | |
1286 case T_ARRAY: | |
1287 case T_OBJECT: | |
1288 regs[i].set2( int_stk_helper( j ) ); | |
1289 break; | |
1290 case T_FLOAT: | |
1291 if ( j < 16 ) { | |
1292 // V9ism: floats go in ODD registers | |
1293 regs[i].set1(as_FloatRegister(1 + (j<<1))->as_VMReg()); | |
1294 } else { | |
1295 // V9ism: floats go in ODD stack slot | |
1296 regs[i].set1(VMRegImpl::stack2reg(1 + (j<<1))); | |
1297 } | |
1298 break; | |
1299 case T_DOUBLE: | |
1300 assert( sig_bt[i+1] == T_VOID, "expecting half" ); | |
1301 if ( j < 16 ) { | |
1302 // V9ism: doubles go in EVEN/ODD regs | |
1303 regs[i].set2(as_FloatRegister(j<<1)->as_VMReg()); | |
1304 } else { | |
1305 // V9ism: doubles go in EVEN/ODD stack slots | |
1306 regs[i].set2(VMRegImpl::stack2reg(j<<1)); | |
1307 } | |
1308 break; | |
1309 case T_VOID: regs[i].set_bad(); j--; break; // Do not count HALVES | |
1310 default: | |
1311 ShouldNotReachHere(); | |
1312 } | |
1313 if (regs[i].first()->is_stack()) { | |
1314 int off = regs[i].first()->reg2stack(); | |
1315 if (off > max_stack_slots) max_stack_slots = off; | |
1316 } | |
1317 if (regs[i].second()->is_stack()) { | |
1318 int off = regs[i].second()->reg2stack(); | |
1319 if (off > max_stack_slots) max_stack_slots = off; | |
1320 } | |
1321 } | |
1322 | |
1323 #else // _LP64 | |
1324 // V8 convention: first 6 things in O-regs, rest on stack. | |
1325 // Alignment is willy-nilly. | |
1326 for( int i=0; i<total_args_passed; i++ ) { | |
1327 switch( sig_bt[i] ) { | |
1328 case T_ADDRESS: // raw pointers, like current thread, for VM calls | |
1329 case T_ARRAY: | |
1330 case T_BOOLEAN: | |
1331 case T_BYTE: | |
1332 case T_CHAR: | |
1333 case T_FLOAT: | |
1334 case T_INT: | |
1335 case T_OBJECT: | |
1336 case T_SHORT: | |
1337 regs[i].set1( int_stk_helper( i ) ); | |
1338 break; | |
1339 case T_DOUBLE: | |
1340 case T_LONG: | |
1341 assert( sig_bt[i+1] == T_VOID, "expecting half" ); | |
1342 regs[i].set_pair( int_stk_helper( i+1 ), int_stk_helper( i ) ); | |
1343 break; | |
1344 case T_VOID: regs[i].set_bad(); break; | |
1345 default: | |
1346 ShouldNotReachHere(); | |
1347 } | |
1348 if (regs[i].first()->is_stack()) { | |
1349 int off = regs[i].first()->reg2stack(); | |
1350 if (off > max_stack_slots) max_stack_slots = off; | |
1351 } | |
1352 if (regs[i].second()->is_stack()) { | |
1353 int off = regs[i].second()->reg2stack(); | |
1354 if (off > max_stack_slots) max_stack_slots = off; | |
1355 } | |
1356 } | |
1357 #endif // _LP64 | |
1358 | |
1359 return round_to(max_stack_slots + 1, 2); | |
1360 | |
1361 } | |
1362 | |
1363 | |
1364 // --------------------------------------------------------------------------- | |
1365 void SharedRuntime::save_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1366 switch (ret_type) { | |
1367 case T_FLOAT: | |
1368 __ stf(FloatRegisterImpl::S, F0, SP, frame_slots*VMRegImpl::stack_slot_size - 4+STACK_BIAS); | |
1369 break; | |
1370 case T_DOUBLE: | |
1371 __ stf(FloatRegisterImpl::D, F0, SP, frame_slots*VMRegImpl::stack_slot_size - 8+STACK_BIAS); | |
1372 break; | |
1373 } | |
1374 } | |
1375 | |
1376 void SharedRuntime::restore_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1377 switch (ret_type) { | |
1378 case T_FLOAT: | |
1379 __ ldf(FloatRegisterImpl::S, SP, frame_slots*VMRegImpl::stack_slot_size - 4+STACK_BIAS, F0); | |
1380 break; | |
1381 case T_DOUBLE: | |
1382 __ ldf(FloatRegisterImpl::D, SP, frame_slots*VMRegImpl::stack_slot_size - 8+STACK_BIAS, F0); | |
1383 break; | |
1384 } | |
1385 } | |
1386 | |
1387 // Check and forward and pending exception. Thread is stored in | |
1388 // L7_thread_cache and possibly NOT in G2_thread. Since this is a native call, there | |
1389 // is no exception handler. We merely pop this frame off and throw the | |
1390 // exception in the caller's frame. | |
1391 static void check_forward_pending_exception(MacroAssembler *masm, Register Rex_oop) { | |
1392 Label L; | |
1393 __ br_null(Rex_oop, false, Assembler::pt, L); | |
1394 __ delayed()->mov(L7_thread_cache, G2_thread); // restore in case we have exception | |
1395 // Since this is a native call, we *know* the proper exception handler | |
1396 // without calling into the VM: it's the empty function. Just pop this | |
1397 // frame and then jump to forward_exception_entry; O7 will contain the | |
1398 // native caller's return PC. | |
727 | 1399 AddressLiteral exception_entry(StubRoutines::forward_exception_entry()); |
1400 __ jump_to(exception_entry, G3_scratch); | |
0 | 1401 __ delayed()->restore(); // Pop this frame off. |
1402 __ bind(L); | |
1403 } | |
1404 | |
1405 // A simple move of integer like type | |
1406 static void simple_move32(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1407 if (src.first()->is_stack()) { | |
1408 if (dst.first()->is_stack()) { | |
1409 // stack to stack | |
1410 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, L5); | |
1411 __ st(L5, SP, reg2offset(dst.first()) + STACK_BIAS); | |
1412 } else { | |
1413 // stack to reg | |
1414 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
1415 } | |
1416 } else if (dst.first()->is_stack()) { | |
1417 // reg to stack | |
1418 __ st(src.first()->as_Register(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
1419 } else { | |
1420 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
1421 } | |
1422 } | |
1423 | |
1424 // On 64 bit we will store integer like items to the stack as | |
1425 // 64 bits items (sparc abi) even though java would only store | |
1426 // 32bits for a parameter. On 32bit it will simply be 32 bits | |
1427 // So this routine will do 32->32 on 32bit and 32->64 on 64bit | |
1428 static void move32_64(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1429 if (src.first()->is_stack()) { | |
1430 if (dst.first()->is_stack()) { | |
1431 // stack to stack | |
1432 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, L5); | |
1433 __ st_ptr(L5, SP, reg2offset(dst.first()) + STACK_BIAS); | |
1434 } else { | |
1435 // stack to reg | |
1436 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
1437 } | |
1438 } else if (dst.first()->is_stack()) { | |
1439 // reg to stack | |
1440 __ st_ptr(src.first()->as_Register(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
1441 } else { | |
1442 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
1443 } | |
1444 } | |
1445 | |
1446 | |
1447 // An oop arg. Must pass a handle not the oop itself | |
1448 static void object_move(MacroAssembler* masm, | |
1449 OopMap* map, | |
1450 int oop_handle_offset, | |
1451 int framesize_in_slots, | |
1452 VMRegPair src, | |
1453 VMRegPair dst, | |
1454 bool is_receiver, | |
1455 int* receiver_offset) { | |
1456 | |
1457 // must pass a handle. First figure out the location we use as a handle | |
1458 | |
1459 if (src.first()->is_stack()) { | |
1460 // Oop is already on the stack | |
1461 Register rHandle = dst.first()->is_stack() ? L5 : dst.first()->as_Register(); | |
1462 __ add(FP, reg2offset(src.first()) + STACK_BIAS, rHandle); | |
1463 __ ld_ptr(rHandle, 0, L4); | |
1464 #ifdef _LP64 | |
1465 __ movr( Assembler::rc_z, L4, G0, rHandle ); | |
1466 #else | |
1467 __ tst( L4 ); | |
1468 __ movcc( Assembler::zero, false, Assembler::icc, G0, rHandle ); | |
1469 #endif | |
1470 if (dst.first()->is_stack()) { | |
1471 __ st_ptr(rHandle, SP, reg2offset(dst.first()) + STACK_BIAS); | |
1472 } | |
1473 int offset_in_older_frame = src.first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); | |
1474 if (is_receiver) { | |
1475 *receiver_offset = (offset_in_older_frame + framesize_in_slots) * VMRegImpl::stack_slot_size; | |
1476 } | |
1477 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + framesize_in_slots)); | |
1478 } else { | |
1479 // Oop is in an input register pass we must flush it to the stack | |
1480 const Register rOop = src.first()->as_Register(); | |
1481 const Register rHandle = L5; | |
1482 int oop_slot = rOop->input_number() * VMRegImpl::slots_per_word + oop_handle_offset; | |
1483 int offset = oop_slot*VMRegImpl::stack_slot_size; | |
1484 Label skip; | |
1485 __ st_ptr(rOop, SP, offset + STACK_BIAS); | |
1486 if (is_receiver) { | |
1487 *receiver_offset = oop_slot * VMRegImpl::stack_slot_size; | |
1488 } | |
1489 map->set_oop(VMRegImpl::stack2reg(oop_slot)); | |
1490 __ add(SP, offset + STACK_BIAS, rHandle); | |
1491 #ifdef _LP64 | |
1492 __ movr( Assembler::rc_z, rOop, G0, rHandle ); | |
1493 #else | |
1494 __ tst( rOop ); | |
1495 __ movcc( Assembler::zero, false, Assembler::icc, G0, rHandle ); | |
1496 #endif | |
1497 | |
1498 if (dst.first()->is_stack()) { | |
1499 __ st_ptr(rHandle, SP, reg2offset(dst.first()) + STACK_BIAS); | |
1500 } else { | |
1501 __ mov(rHandle, dst.first()->as_Register()); | |
1502 } | |
1503 } | |
1504 } | |
1505 | |
1506 // A float arg may have to do float reg int reg conversion | |
1507 static void float_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1508 assert(!src.second()->is_valid() && !dst.second()->is_valid(), "bad float_move"); | |
1509 | |
1510 if (src.first()->is_stack()) { | |
1511 if (dst.first()->is_stack()) { | |
1512 // stack to stack the easiest of the bunch | |
1513 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, L5); | |
1514 __ st(L5, SP, reg2offset(dst.first()) + STACK_BIAS); | |
1515 } else { | |
1516 // stack to reg | |
1517 if (dst.first()->is_Register()) { | |
1518 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
1519 } else { | |
1520 __ ldf(FloatRegisterImpl::S, FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_FloatRegister()); | |
1521 } | |
1522 } | |
1523 } else if (dst.first()->is_stack()) { | |
1524 // reg to stack | |
1525 if (src.first()->is_Register()) { | |
1526 __ st(src.first()->as_Register(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
1527 } else { | |
1528 __ stf(FloatRegisterImpl::S, src.first()->as_FloatRegister(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
1529 } | |
1530 } else { | |
1531 // reg to reg | |
1532 if (src.first()->is_Register()) { | |
1533 if (dst.first()->is_Register()) { | |
1534 // gpr -> gpr | |
1535 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
1536 } else { | |
1537 // gpr -> fpr | |
1538 __ st(src.first()->as_Register(), FP, -4 + STACK_BIAS); | |
1539 __ ldf(FloatRegisterImpl::S, FP, -4 + STACK_BIAS, dst.first()->as_FloatRegister()); | |
1540 } | |
1541 } else if (dst.first()->is_Register()) { | |
1542 // fpr -> gpr | |
1543 __ stf(FloatRegisterImpl::S, src.first()->as_FloatRegister(), FP, -4 + STACK_BIAS); | |
1544 __ ld(FP, -4 + STACK_BIAS, dst.first()->as_Register()); | |
1545 } else { | |
1546 // fpr -> fpr | |
1547 // In theory these overlap but the ordering is such that this is likely a nop | |
1548 if ( src.first() != dst.first()) { | |
1549 __ fmov(FloatRegisterImpl::S, src.first()->as_FloatRegister(), dst.first()->as_FloatRegister()); | |
1550 } | |
1551 } | |
1552 } | |
1553 } | |
1554 | |
1555 static void split_long_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1556 VMRegPair src_lo(src.first()); | |
1557 VMRegPair src_hi(src.second()); | |
1558 VMRegPair dst_lo(dst.first()); | |
1559 VMRegPair dst_hi(dst.second()); | |
1560 simple_move32(masm, src_lo, dst_lo); | |
1561 simple_move32(masm, src_hi, dst_hi); | |
1562 } | |
1563 | |
1564 // A long move | |
1565 static void long_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1566 | |
1567 // Do the simple ones here else do two int moves | |
1568 if (src.is_single_phys_reg() ) { | |
1569 if (dst.is_single_phys_reg()) { | |
1570 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
1571 } else { | |
1572 // split src into two separate registers | |
1573 // Remember hi means hi address or lsw on sparc | |
1574 // Move msw to lsw | |
1575 if (dst.second()->is_reg()) { | |
1576 // MSW -> MSW | |
1577 __ srax(src.first()->as_Register(), 32, dst.first()->as_Register()); | |
1578 // Now LSW -> LSW | |
1579 // this will only move lo -> lo and ignore hi | |
1580 VMRegPair split(dst.second()); | |
1581 simple_move32(masm, src, split); | |
1582 } else { | |
1583 VMRegPair split(src.first(), L4->as_VMReg()); | |
1584 // MSW -> MSW (lo ie. first word) | |
1585 __ srax(src.first()->as_Register(), 32, L4); | |
1586 split_long_move(masm, split, dst); | |
1587 } | |
1588 } | |
1589 } else if (dst.is_single_phys_reg()) { | |
1590 if (src.is_adjacent_aligned_on_stack(2)) { | |
304 | 1591 __ ldx(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); |
0 | 1592 } else { |
1593 // dst is a single reg. | |
1594 // Remember lo is low address not msb for stack slots | |
1595 // and lo is the "real" register for registers | |
1596 // src is | |
1597 | |
1598 VMRegPair split; | |
1599 | |
1600 if (src.first()->is_reg()) { | |
1601 // src.lo (msw) is a reg, src.hi is stk/reg | |
1602 // we will move: src.hi (LSW) -> dst.lo, src.lo (MSW) -> src.lo [the MSW is in the LSW of the reg] | |
1603 split.set_pair(dst.first(), src.first()); | |
1604 } else { | |
1605 // msw is stack move to L5 | |
1606 // lsw is stack move to dst.lo (real reg) | |
1607 // we will move: src.hi (LSW) -> dst.lo, src.lo (MSW) -> L5 | |
1608 split.set_pair(dst.first(), L5->as_VMReg()); | |
1609 } | |
1610 | |
1611 // src.lo -> src.lo/L5, src.hi -> dst.lo (the real reg) | |
1612 // msw -> src.lo/L5, lsw -> dst.lo | |
1613 split_long_move(masm, src, split); | |
1614 | |
1615 // So dst now has the low order correct position the | |
1616 // msw half | |
1617 __ sllx(split.first()->as_Register(), 32, L5); | |
1618 | |
1619 const Register d = dst.first()->as_Register(); | |
1620 __ or3(L5, d, d); | |
1621 } | |
1622 } else { | |
1623 // For LP64 we can probably do better. | |
1624 split_long_move(masm, src, dst); | |
1625 } | |
1626 } | |
1627 | |
1628 // A double move | |
1629 static void double_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1630 | |
1631 // The painful thing here is that like long_move a VMRegPair might be | |
1632 // 1: a single physical register | |
1633 // 2: two physical registers (v8) | |
1634 // 3: a physical reg [lo] and a stack slot [hi] (v8) | |
1635 // 4: two stack slots | |
1636 | |
1637 // Since src is always a java calling convention we know that the src pair | |
1638 // is always either all registers or all stack (and aligned?) | |
1639 | |
1640 // in a register [lo] and a stack slot [hi] | |
1641 if (src.first()->is_stack()) { | |
1642 if (dst.first()->is_stack()) { | |
1643 // stack to stack the easiest of the bunch | |
1644 // ought to be a way to do this where if alignment is ok we use ldd/std when possible | |
1645 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, L5); | |
1646 __ ld(FP, reg2offset(src.second()) + STACK_BIAS, L4); | |
1647 __ st(L5, SP, reg2offset(dst.first()) + STACK_BIAS); | |
1648 __ st(L4, SP, reg2offset(dst.second()) + STACK_BIAS); | |
1649 } else { | |
1650 // stack to reg | |
1651 if (dst.second()->is_stack()) { | |
1652 // stack -> reg, stack -> stack | |
1653 __ ld(FP, reg2offset(src.second()) + STACK_BIAS, L4); | |
1654 if (dst.first()->is_Register()) { | |
1655 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
1656 } else { | |
1657 __ ldf(FloatRegisterImpl::S, FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_FloatRegister()); | |
1658 } | |
1659 // This was missing. (very rare case) | |
1660 __ st(L4, SP, reg2offset(dst.second()) + STACK_BIAS); | |
1661 } else { | |
1662 // stack -> reg | |
1663 // Eventually optimize for alignment QQQ | |
1664 if (dst.first()->is_Register()) { | |
1665 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
1666 __ ld(FP, reg2offset(src.second()) + STACK_BIAS, dst.second()->as_Register()); | |
1667 } else { | |
1668 __ ldf(FloatRegisterImpl::S, FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_FloatRegister()); | |
1669 __ ldf(FloatRegisterImpl::S, FP, reg2offset(src.second()) + STACK_BIAS, dst.second()->as_FloatRegister()); | |
1670 } | |
1671 } | |
1672 } | |
1673 } else if (dst.first()->is_stack()) { | |
1674 // reg to stack | |
1675 if (src.first()->is_Register()) { | |
1676 // Eventually optimize for alignment QQQ | |
1677 __ st(src.first()->as_Register(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
1678 if (src.second()->is_stack()) { | |
1679 __ ld(FP, reg2offset(src.second()) + STACK_BIAS, L4); | |
1680 __ st(L4, SP, reg2offset(dst.second()) + STACK_BIAS); | |
1681 } else { | |
1682 __ st(src.second()->as_Register(), SP, reg2offset(dst.second()) + STACK_BIAS); | |
1683 } | |
1684 } else { | |
1685 // fpr to stack | |
1686 if (src.second()->is_stack()) { | |
1687 ShouldNotReachHere(); | |
1688 } else { | |
1689 // Is the stack aligned? | |
1690 if (reg2offset(dst.first()) & 0x7) { | |
1691 // No do as pairs | |
1692 __ stf(FloatRegisterImpl::S, src.first()->as_FloatRegister(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
1693 __ stf(FloatRegisterImpl::S, src.second()->as_FloatRegister(), SP, reg2offset(dst.second()) + STACK_BIAS); | |
1694 } else { | |
1695 __ stf(FloatRegisterImpl::D, src.first()->as_FloatRegister(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
1696 } | |
1697 } | |
1698 } | |
1699 } else { | |
1700 // reg to reg | |
1701 if (src.first()->is_Register()) { | |
1702 if (dst.first()->is_Register()) { | |
1703 // gpr -> gpr | |
1704 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
1705 __ mov(src.second()->as_Register(), dst.second()->as_Register()); | |
1706 } else { | |
1707 // gpr -> fpr | |
1708 // ought to be able to do a single store | |
1709 __ stx(src.first()->as_Register(), FP, -8 + STACK_BIAS); | |
1710 __ stx(src.second()->as_Register(), FP, -4 + STACK_BIAS); | |
1711 // ought to be able to do a single load | |
1712 __ ldf(FloatRegisterImpl::S, FP, -8 + STACK_BIAS, dst.first()->as_FloatRegister()); | |
1713 __ ldf(FloatRegisterImpl::S, FP, -4 + STACK_BIAS, dst.second()->as_FloatRegister()); | |
1714 } | |
1715 } else if (dst.first()->is_Register()) { | |
1716 // fpr -> gpr | |
1717 // ought to be able to do a single store | |
1718 __ stf(FloatRegisterImpl::D, src.first()->as_FloatRegister(), FP, -8 + STACK_BIAS); | |
1719 // ought to be able to do a single load | |
1720 // REMEMBER first() is low address not LSB | |
1721 __ ld(FP, -8 + STACK_BIAS, dst.first()->as_Register()); | |
1722 if (dst.second()->is_Register()) { | |
1723 __ ld(FP, -4 + STACK_BIAS, dst.second()->as_Register()); | |
1724 } else { | |
1725 __ ld(FP, -4 + STACK_BIAS, L4); | |
1726 __ st(L4, SP, reg2offset(dst.second()) + STACK_BIAS); | |
1727 } | |
1728 } else { | |
1729 // fpr -> fpr | |
1730 // In theory these overlap but the ordering is such that this is likely a nop | |
1731 if ( src.first() != dst.first()) { | |
1732 __ fmov(FloatRegisterImpl::D, src.first()->as_FloatRegister(), dst.first()->as_FloatRegister()); | |
1733 } | |
1734 } | |
1735 } | |
1736 } | |
1737 | |
1738 // Creates an inner frame if one hasn't already been created, and | |
1739 // saves a copy of the thread in L7_thread_cache | |
1740 static void create_inner_frame(MacroAssembler* masm, bool* already_created) { | |
1741 if (!*already_created) { | |
1742 __ save_frame(0); | |
1743 // Save thread in L7 (INNER FRAME); it crosses a bunch of VM calls below | |
1744 // Don't use save_thread because it smashes G2 and we merely want to save a | |
1745 // copy | |
1746 __ mov(G2_thread, L7_thread_cache); | |
1747 *already_created = true; | |
1748 } | |
1749 } | |
1750 | |
1751 // --------------------------------------------------------------------------- | |
1752 // Generate a native wrapper for a given method. The method takes arguments | |
1753 // in the Java compiled code convention, marshals them to the native | |
1754 // convention (handlizes oops, etc), transitions to native, makes the call, | |
1755 // returns to java state (possibly blocking), unhandlizes any result and | |
1756 // returns. | |
1757 nmethod *SharedRuntime::generate_native_wrapper(MacroAssembler* masm, | |
1758 methodHandle method, | |
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1759 int compile_id, |
0 | 1760 int total_in_args, |
1761 int comp_args_on_stack, // in VMRegStackSlots | |
1762 BasicType *in_sig_bt, | |
1763 VMRegPair *in_regs, | |
1764 BasicType ret_type) { | |
1765 | |
1766 // Native nmethod wrappers never take possesion of the oop arguments. | |
1767 // So the caller will gc the arguments. The only thing we need an | |
1768 // oopMap for is if the call is static | |
1769 // | |
1770 // An OopMap for lock (and class if static), and one for the VM call itself | |
1771 OopMapSet *oop_maps = new OopMapSet(); | |
1772 intptr_t start = (intptr_t)__ pc(); | |
1773 | |
1774 // First thing make an ic check to see if we should even be here | |
1775 { | |
1776 Label L; | |
1777 const Register temp_reg = G3_scratch; | |
727 | 1778 AddressLiteral ic_miss(SharedRuntime::get_ic_miss_stub()); |
0 | 1779 __ verify_oop(O0); |
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1780 __ load_klass(O0, temp_reg); |
3839 | 1781 __ cmp_and_brx_short(temp_reg, G5_inline_cache_reg, Assembler::equal, Assembler::pt, L); |
0 | 1782 |
727 | 1783 __ jump_to(ic_miss, temp_reg); |
0 | 1784 __ delayed()->nop(); |
1785 __ align(CodeEntryAlignment); | |
1786 __ bind(L); | |
1787 } | |
1788 | |
1789 int vep_offset = ((intptr_t)__ pc()) - start; | |
1790 | |
1791 #ifdef COMPILER1 | |
1792 if (InlineObjectHash && method->intrinsic_id() == vmIntrinsics::_hashCode) { | |
1793 // Object.hashCode can pull the hashCode from the header word | |
1794 // instead of doing a full VM transition once it's been computed. | |
1795 // Since hashCode is usually polymorphic at call sites we can't do | |
1796 // this optimization at the call site without a lot of work. | |
1797 Label slowCase; | |
1798 Register receiver = O0; | |
1799 Register result = O0; | |
1800 Register header = G3_scratch; | |
1801 Register hash = G3_scratch; // overwrite header value with hash value | |
1802 Register mask = G1; // to get hash field from header | |
1803 | |
1804 // Read the header and build a mask to get its hash field. Give up if the object is not unlocked. | |
1805 // We depend on hash_mask being at most 32 bits and avoid the use of | |
1806 // hash_mask_in_place because it could be larger than 32 bits in a 64-bit | |
1807 // vm: see markOop.hpp. | |
1808 __ ld_ptr(receiver, oopDesc::mark_offset_in_bytes(), header); | |
1809 __ sethi(markOopDesc::hash_mask, mask); | |
1810 __ btst(markOopDesc::unlocked_value, header); | |
1811 __ br(Assembler::zero, false, Assembler::pn, slowCase); | |
1812 if (UseBiasedLocking) { | |
1813 // Check if biased and fall through to runtime if so | |
1814 __ delayed()->nop(); | |
1815 __ btst(markOopDesc::biased_lock_bit_in_place, header); | |
1816 __ br(Assembler::notZero, false, Assembler::pn, slowCase); | |
1817 } | |
1818 __ delayed()->or3(mask, markOopDesc::hash_mask & 0x3ff, mask); | |
1819 | |
1820 // Check for a valid (non-zero) hash code and get its value. | |
1821 #ifdef _LP64 | |
1822 __ srlx(header, markOopDesc::hash_shift, hash); | |
1823 #else | |
1824 __ srl(header, markOopDesc::hash_shift, hash); | |
1825 #endif | |
1826 __ andcc(hash, mask, hash); | |
1827 __ br(Assembler::equal, false, Assembler::pn, slowCase); | |
1828 __ delayed()->nop(); | |
1829 | |
1830 // leaf return. | |
1831 __ retl(); | |
1832 __ delayed()->mov(hash, result); | |
1833 __ bind(slowCase); | |
1834 } | |
1835 #endif // COMPILER1 | |
1836 | |
1837 | |
1838 // We have received a description of where all the java arg are located | |
1839 // on entry to the wrapper. We need to convert these args to where | |
1840 // the jni function will expect them. To figure out where they go | |
1841 // we convert the java signature to a C signature by inserting | |
1842 // the hidden arguments as arg[0] and possibly arg[1] (static method) | |
1843 | |
1844 int total_c_args = total_in_args + 1; | |
1845 if (method->is_static()) { | |
1846 total_c_args++; | |
1847 } | |
1848 | |
1849 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_c_args); | |
1850 VMRegPair * out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_c_args); | |
1851 | |
1852 int argc = 0; | |
1853 out_sig_bt[argc++] = T_ADDRESS; | |
1854 if (method->is_static()) { | |
1855 out_sig_bt[argc++] = T_OBJECT; | |
1856 } | |
1857 | |
1858 for (int i = 0; i < total_in_args ; i++ ) { | |
1859 out_sig_bt[argc++] = in_sig_bt[i]; | |
1860 } | |
1861 | |
1862 // Now figure out where the args must be stored and how much stack space | |
1863 // they require (neglecting out_preserve_stack_slots but space for storing | |
1864 // the 1st six register arguments). It's weird see int_stk_helper. | |
1865 // | |
1866 int out_arg_slots; | |
1867 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); | |
1868 | |
1869 // Compute framesize for the wrapper. We need to handlize all oops in | |
1870 // registers. We must create space for them here that is disjoint from | |
1871 // the windowed save area because we have no control over when we might | |
1872 // flush the window again and overwrite values that gc has since modified. | |
1873 // (The live window race) | |
1874 // | |
1875 // We always just allocate 6 word for storing down these object. This allow | |
1876 // us to simply record the base and use the Ireg number to decide which | |
1877 // slot to use. (Note that the reg number is the inbound number not the | |
1878 // outbound number). | |
1879 // We must shuffle args to match the native convention, and include var-args space. | |
1880 | |
1881 // Calculate the total number of stack slots we will need. | |
1882 | |
1883 // First count the abi requirement plus all of the outgoing args | |
1884 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; | |
1885 | |
1886 // Now the space for the inbound oop handle area | |
1887 | |
1888 int oop_handle_offset = stack_slots; | |
1889 stack_slots += 6*VMRegImpl::slots_per_word; | |
1890 | |
1891 // Now any space we need for handlizing a klass if static method | |
1892 | |
1893 int oop_temp_slot_offset = 0; | |
1894 int klass_slot_offset = 0; | |
1895 int klass_offset = -1; | |
1896 int lock_slot_offset = 0; | |
1897 bool is_static = false; | |
1898 | |
1899 if (method->is_static()) { | |
1900 klass_slot_offset = stack_slots; | |
1901 stack_slots += VMRegImpl::slots_per_word; | |
1902 klass_offset = klass_slot_offset * VMRegImpl::stack_slot_size; | |
1903 is_static = true; | |
1904 } | |
1905 | |
1906 // Plus a lock if needed | |
1907 | |
1908 if (method->is_synchronized()) { | |
1909 lock_slot_offset = stack_slots; | |
1910 stack_slots += VMRegImpl::slots_per_word; | |
1911 } | |
1912 | |
1913 // Now a place to save return value or as a temporary for any gpr -> fpr moves | |
1914 stack_slots += 2; | |
1915 | |
1916 // Ok The space we have allocated will look like: | |
1917 // | |
1918 // | |
1919 // FP-> | | | |
1920 // |---------------------| | |
1921 // | 2 slots for moves | | |
1922 // |---------------------| | |
1923 // | lock box (if sync) | | |
1924 // |---------------------| <- lock_slot_offset | |
1925 // | klass (if static) | | |
1926 // |---------------------| <- klass_slot_offset | |
1927 // | oopHandle area | | |
1928 // |---------------------| <- oop_handle_offset | |
1929 // | outbound memory | | |
1930 // | based arguments | | |
1931 // | | | |
1932 // |---------------------| | |
1933 // | vararg area | | |
1934 // |---------------------| | |
1935 // | | | |
1936 // SP-> | out_preserved_slots | | |
1937 // | |
1938 // | |
1939 | |
1940 | |
1941 // Now compute actual number of stack words we need rounding to make | |
1942 // stack properly aligned. | |
1943 stack_slots = round_to(stack_slots, 2 * VMRegImpl::slots_per_word); | |
1944 | |
1945 int stack_size = stack_slots * VMRegImpl::stack_slot_size; | |
1946 | |
1947 // Generate stack overflow check before creating frame | |
1948 __ generate_stack_overflow_check(stack_size); | |
1949 | |
1950 // Generate a new frame for the wrapper. | |
1951 __ save(SP, -stack_size, SP); | |
1952 | |
1953 int frame_complete = ((intptr_t)__ pc()) - start; | |
1954 | |
1955 __ verify_thread(); | |
1956 | |
1957 | |
1958 // | |
1959 // We immediately shuffle the arguments so that any vm call we have to | |
1960 // make from here on out (sync slow path, jvmti, etc.) we will have | |
1961 // captured the oops from our caller and have a valid oopMap for | |
1962 // them. | |
1963 | |
1964 // ----------------- | |
1965 // The Grand Shuffle | |
1966 // | |
1967 // Natives require 1 or 2 extra arguments over the normal ones: the JNIEnv* | |
1968 // (derived from JavaThread* which is in L7_thread_cache) and, if static, | |
1969 // the class mirror instead of a receiver. This pretty much guarantees that | |
1970 // register layout will not match. We ignore these extra arguments during | |
1971 // the shuffle. The shuffle is described by the two calling convention | |
1972 // vectors we have in our possession. We simply walk the java vector to | |
1973 // get the source locations and the c vector to get the destinations. | |
1974 // Because we have a new window and the argument registers are completely | |
1975 // disjoint ( I0 -> O1, I1 -> O2, ...) we have nothing to worry about | |
1976 // here. | |
1977 | |
1978 // This is a trick. We double the stack slots so we can claim | |
1979 // the oops in the caller's frame. Since we are sure to have | |
1980 // more args than the caller doubling is enough to make | |
1981 // sure we can capture all the incoming oop args from the | |
1982 // caller. | |
1983 // | |
1984 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); | |
1985 int c_arg = total_c_args - 1; | |
1986 // Record sp-based slot for receiver on stack for non-static methods | |
1987 int receiver_offset = -1; | |
1988 | |
1989 // We move the arguments backward because the floating point registers | |
1990 // destination will always be to a register with a greater or equal register | |
1991 // number or the stack. | |
1992 | |
1993 #ifdef ASSERT | |
1994 bool reg_destroyed[RegisterImpl::number_of_registers]; | |
1995 bool freg_destroyed[FloatRegisterImpl::number_of_registers]; | |
1996 for ( int r = 0 ; r < RegisterImpl::number_of_registers ; r++ ) { | |
1997 reg_destroyed[r] = false; | |
1998 } | |
1999 for ( int f = 0 ; f < FloatRegisterImpl::number_of_registers ; f++ ) { | |
2000 freg_destroyed[f] = false; | |
2001 } | |
2002 | |
2003 #endif /* ASSERT */ | |
2004 | |
2005 for ( int i = total_in_args - 1; i >= 0 ; i--, c_arg-- ) { | |
2006 | |
2007 #ifdef ASSERT | |
2008 if (in_regs[i].first()->is_Register()) { | |
2009 assert(!reg_destroyed[in_regs[i].first()->as_Register()->encoding()], "ack!"); | |
2010 } else if (in_regs[i].first()->is_FloatRegister()) { | |
2011 assert(!freg_destroyed[in_regs[i].first()->as_FloatRegister()->encoding(FloatRegisterImpl::S)], "ack!"); | |
2012 } | |
2013 if (out_regs[c_arg].first()->is_Register()) { | |
2014 reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true; | |
2015 } else if (out_regs[c_arg].first()->is_FloatRegister()) { | |
2016 freg_destroyed[out_regs[c_arg].first()->as_FloatRegister()->encoding(FloatRegisterImpl::S)] = true; | |
2017 } | |
2018 #endif /* ASSERT */ | |
2019 | |
2020 switch (in_sig_bt[i]) { | |
2021 case T_ARRAY: | |
2022 case T_OBJECT: | |
2023 object_move(masm, map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg], | |
2024 ((i == 0) && (!is_static)), | |
2025 &receiver_offset); | |
2026 break; | |
2027 case T_VOID: | |
2028 break; | |
2029 | |
2030 case T_FLOAT: | |
2031 float_move(masm, in_regs[i], out_regs[c_arg]); | |
2032 break; | |
2033 | |
2034 case T_DOUBLE: | |
2035 assert( i + 1 < total_in_args && | |
2036 in_sig_bt[i + 1] == T_VOID && | |
2037 out_sig_bt[c_arg+1] == T_VOID, "bad arg list"); | |
2038 double_move(masm, in_regs[i], out_regs[c_arg]); | |
2039 break; | |
2040 | |
2041 case T_LONG : | |
2042 long_move(masm, in_regs[i], out_regs[c_arg]); | |
2043 break; | |
2044 | |
2045 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); | |
2046 | |
2047 default: | |
2048 move32_64(masm, in_regs[i], out_regs[c_arg]); | |
2049 } | |
2050 } | |
2051 | |
2052 // Pre-load a static method's oop into O1. Used both by locking code and | |
2053 // the normal JNI call code. | |
2054 if (method->is_static()) { | |
2055 __ set_oop_constant(JNIHandles::make_local(Klass::cast(method->method_holder())->java_mirror()), O1); | |
2056 | |
2057 // Now handlize the static class mirror in O1. It's known not-null. | |
2058 __ st_ptr(O1, SP, klass_offset + STACK_BIAS); | |
2059 map->set_oop(VMRegImpl::stack2reg(klass_slot_offset)); | |
2060 __ add(SP, klass_offset + STACK_BIAS, O1); | |
2061 } | |
2062 | |
2063 | |
2064 const Register L6_handle = L6; | |
2065 | |
2066 if (method->is_synchronized()) { | |
2067 __ mov(O1, L6_handle); | |
2068 } | |
2069 | |
2070 // We have all of the arguments setup at this point. We MUST NOT touch any Oregs | |
2071 // except O6/O7. So if we must call out we must push a new frame. We immediately | |
2072 // push a new frame and flush the windows. | |
2073 | |
2074 #ifdef _LP64 | |
2075 intptr_t thepc = (intptr_t) __ pc(); | |
2076 { | |
2077 address here = __ pc(); | |
2078 // Call the next instruction | |
2079 __ call(here + 8, relocInfo::none); | |
2080 __ delayed()->nop(); | |
2081 } | |
2082 #else | |
2083 intptr_t thepc = __ load_pc_address(O7, 0); | |
2084 #endif /* _LP64 */ | |
2085 | |
2086 // We use the same pc/oopMap repeatedly when we call out | |
2087 oop_maps->add_gc_map(thepc - start, map); | |
2088 | |
2089 // O7 now has the pc loaded that we will use when we finally call to native. | |
2090 | |
2091 // Save thread in L7; it crosses a bunch of VM calls below | |
2092 // Don't use save_thread because it smashes G2 and we merely | |
2093 // want to save a copy | |
2094 __ mov(G2_thread, L7_thread_cache); | |
2095 | |
2096 | |
2097 // If we create an inner frame once is plenty | |
2098 // when we create it we must also save G2_thread | |
2099 bool inner_frame_created = false; | |
2100 | |
2101 // dtrace method entry support | |
2102 { | |
2103 SkipIfEqual skip_if( | |
2104 masm, G3_scratch, &DTraceMethodProbes, Assembler::zero); | |
2105 // create inner frame | |
2106 __ save_frame(0); | |
2107 __ mov(G2_thread, L7_thread_cache); | |
2108 __ set_oop_constant(JNIHandles::make_local(method()), O1); | |
2109 __ call_VM_leaf(L7_thread_cache, | |
2110 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
2111 G2_thread, O1); | |
2112 __ restore(); | |
2113 } | |
2114 | |
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2115 // RedefineClasses() tracing support for obsolete method entry |
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2116 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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2117 // create inner frame |
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2118 __ save_frame(0); |
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2119 __ mov(G2_thread, L7_thread_cache); |
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2120 __ set_oop_constant(JNIHandles::make_local(method()), O1); |
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2121 __ call_VM_leaf(L7_thread_cache, |
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2122 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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2123 G2_thread, O1); |
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2124 __ restore(); |
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2125 } |
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2126 |
0 | 2127 // We are in the jni frame unless saved_frame is true in which case |
2128 // we are in one frame deeper (the "inner" frame). If we are in the | |
2129 // "inner" frames the args are in the Iregs and if the jni frame then | |
2130 // they are in the Oregs. | |
2131 // If we ever need to go to the VM (for locking, jvmti) then | |
2132 // we will always be in the "inner" frame. | |
2133 | |
2134 // Lock a synchronized method | |
2135 int lock_offset = -1; // Set if locked | |
2136 if (method->is_synchronized()) { | |
2137 Register Roop = O1; | |
2138 const Register L3_box = L3; | |
2139 | |
2140 create_inner_frame(masm, &inner_frame_created); | |
2141 | |
2142 __ ld_ptr(I1, 0, O1); | |
2143 Label done; | |
2144 | |
2145 lock_offset = (lock_slot_offset * VMRegImpl::stack_slot_size); | |
2146 __ add(FP, lock_offset+STACK_BIAS, L3_box); | |
2147 #ifdef ASSERT | |
2148 if (UseBiasedLocking) { | |
2149 // making the box point to itself will make it clear it went unused | |
2150 // but also be obviously invalid | |
2151 __ st_ptr(L3_box, L3_box, 0); | |
2152 } | |
2153 #endif // ASSERT | |
2154 // | |
2155 // Compiler_lock_object (Roop, Rmark, Rbox, Rscratch) -- kills Rmark, Rbox, Rscratch | |
2156 // | |
2157 __ compiler_lock_object(Roop, L1, L3_box, L2); | |
2158 __ br(Assembler::equal, false, Assembler::pt, done); | |
2159 __ delayed() -> add(FP, lock_offset+STACK_BIAS, L3_box); | |
2160 | |
2161 | |
2162 // None of the above fast optimizations worked so we have to get into the | |
2163 // slow case of monitor enter. Inline a special case of call_VM that | |
2164 // disallows any pending_exception. | |
2165 __ mov(Roop, O0); // Need oop in O0 | |
2166 __ mov(L3_box, O1); | |
2167 | |
2168 // Record last_Java_sp, in case the VM code releases the JVM lock. | |
2169 | |
2170 __ set_last_Java_frame(FP, I7); | |
2171 | |
2172 // do the call | |
2173 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_locking_C), relocInfo::runtime_call_type); | |
2174 __ delayed()->mov(L7_thread_cache, O2); | |
2175 | |
2176 __ restore_thread(L7_thread_cache); // restore G2_thread | |
2177 __ reset_last_Java_frame(); | |
2178 | |
2179 #ifdef ASSERT | |
2180 { Label L; | |
2181 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), O0); | |
3839 | 2182 __ br_null_short(O0, Assembler::pt, L); |
0 | 2183 __ stop("no pending exception allowed on exit from IR::monitorenter"); |
2184 __ bind(L); | |
2185 } | |
2186 #endif | |
2187 __ bind(done); | |
2188 } | |
2189 | |
2190 | |
2191 // Finally just about ready to make the JNI call | |
2192 | |
2193 __ flush_windows(); | |
2194 if (inner_frame_created) { | |
2195 __ restore(); | |
2196 } else { | |
2197 // Store only what we need from this frame | |
2198 // QQQ I think that non-v9 (like we care) we don't need these saves | |
2199 // either as the flush traps and the current window goes too. | |
2200 __ st_ptr(FP, SP, FP->sp_offset_in_saved_window()*wordSize + STACK_BIAS); | |
2201 __ st_ptr(I7, SP, I7->sp_offset_in_saved_window()*wordSize + STACK_BIAS); | |
2202 } | |
2203 | |
2204 // get JNIEnv* which is first argument to native | |
2205 | |
2206 __ add(G2_thread, in_bytes(JavaThread::jni_environment_offset()), O0); | |
2207 | |
2208 // Use that pc we placed in O7 a while back as the current frame anchor | |
2209 | |
2210 __ set_last_Java_frame(SP, O7); | |
2211 | |
2212 // Transition from _thread_in_Java to _thread_in_native. | |
2213 __ set(_thread_in_native, G3_scratch); | |
727 | 2214 __ st(G3_scratch, G2_thread, JavaThread::thread_state_offset()); |
0 | 2215 |
2216 // We flushed the windows ages ago now mark them as flushed | |
2217 | |
2218 // mark windows as flushed | |
2219 __ set(JavaFrameAnchor::flushed, G3_scratch); | |
2220 | |
727 | 2221 Address flags(G2_thread, JavaThread::frame_anchor_offset() + JavaFrameAnchor::flags_offset()); |
0 | 2222 |
2223 #ifdef _LP64 | |
727 | 2224 AddressLiteral dest(method->native_function()); |
0 | 2225 __ relocate(relocInfo::runtime_call_type); |
727 | 2226 __ jumpl_to(dest, O7, O7); |
0 | 2227 #else |
2228 __ call(method->native_function(), relocInfo::runtime_call_type); | |
2229 #endif | |
2230 __ delayed()->st(G3_scratch, flags); | |
2231 | |
2232 __ restore_thread(L7_thread_cache); // restore G2_thread | |
2233 | |
2234 // Unpack native results. For int-types, we do any needed sign-extension | |
2235 // and move things into I0. The return value there will survive any VM | |
2236 // calls for blocking or unlocking. An FP or OOP result (handle) is done | |
2237 // specially in the slow-path code. | |
2238 switch (ret_type) { | |
2239 case T_VOID: break; // Nothing to do! | |
2240 case T_FLOAT: break; // Got it where we want it (unless slow-path) | |
2241 case T_DOUBLE: break; // Got it where we want it (unless slow-path) | |
2242 // In 64 bits build result is in O0, in O0, O1 in 32bit build | |
2243 case T_LONG: | |
2244 #ifndef _LP64 | |
2245 __ mov(O1, I1); | |
2246 #endif | |
2247 // Fall thru | |
2248 case T_OBJECT: // Really a handle | |
2249 case T_ARRAY: | |
2250 case T_INT: | |
2251 __ mov(O0, I0); | |
2252 break; | |
2253 case T_BOOLEAN: __ subcc(G0, O0, G0); __ addc(G0, 0, I0); break; // !0 => true; 0 => false | |
2254 case T_BYTE : __ sll(O0, 24, O0); __ sra(O0, 24, I0); break; | |
2255 case T_CHAR : __ sll(O0, 16, O0); __ srl(O0, 16, I0); break; // cannot use and3, 0xFFFF too big as immediate value! | |
2256 case T_SHORT : __ sll(O0, 16, O0); __ sra(O0, 16, I0); break; | |
2257 break; // Cannot de-handlize until after reclaiming jvm_lock | |
2258 default: | |
2259 ShouldNotReachHere(); | |
2260 } | |
2261 | |
2262 // must we block? | |
2263 | |
2264 // Block, if necessary, before resuming in _thread_in_Java state. | |
2265 // In order for GC to work, don't clear the last_Java_sp until after blocking. | |
2266 { Label no_block; | |
727 | 2267 AddressLiteral sync_state(SafepointSynchronize::address_of_state()); |
0 | 2268 |
2269 // Switch thread to "native transition" state before reading the synchronization state. | |
2270 // This additional state is necessary because reading and testing the synchronization | |
2271 // state is not atomic w.r.t. GC, as this scenario demonstrates: | |
2272 // Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted. | |
2273 // VM thread changes sync state to synchronizing and suspends threads for GC. | |
2274 // Thread A is resumed to finish this native method, but doesn't block here since it | |
2275 // didn't see any synchronization is progress, and escapes. | |
2276 __ set(_thread_in_native_trans, G3_scratch); | |
727 | 2277 __ st(G3_scratch, G2_thread, JavaThread::thread_state_offset()); |
0 | 2278 if(os::is_MP()) { |
2279 if (UseMembar) { | |
2280 // Force this write out before the read below | |
2281 __ membar(Assembler::StoreLoad); | |
2282 } else { | |
2283 // Write serialization page so VM thread can do a pseudo remote membar. | |
2284 // We use the current thread pointer to calculate a thread specific | |
2285 // offset to write to within the page. This minimizes bus traffic | |
2286 // due to cache line collision. | |
2287 __ serialize_memory(G2_thread, G1_scratch, G3_scratch); | |
2288 } | |
2289 } | |
2290 __ load_contents(sync_state, G3_scratch); | |
2291 __ cmp(G3_scratch, SafepointSynchronize::_not_synchronized); | |
2292 | |
2293 Label L; | |
727 | 2294 Address suspend_state(G2_thread, JavaThread::suspend_flags_offset()); |
0 | 2295 __ br(Assembler::notEqual, false, Assembler::pn, L); |
727 | 2296 __ delayed()->ld(suspend_state, G3_scratch); |
3839 | 2297 __ cmp_and_br_short(G3_scratch, 0, Assembler::equal, Assembler::pt, no_block); |
0 | 2298 __ bind(L); |
2299 | |
2300 // Block. Save any potential method result value before the operation and | |
2301 // use a leaf call to leave the last_Java_frame setup undisturbed. Doing this | |
2302 // lets us share the oopMap we used when we went native rather the create | |
2303 // a distinct one for this pc | |
2304 // | |
2305 save_native_result(masm, ret_type, stack_slots); | |
2306 __ call_VM_leaf(L7_thread_cache, | |
2307 CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans), | |
2308 G2_thread); | |
2309 | |
2310 // Restore any method result value | |
2311 restore_native_result(masm, ret_type, stack_slots); | |
2312 __ bind(no_block); | |
2313 } | |
2314 | |
2315 // thread state is thread_in_native_trans. Any safepoint blocking has already | |
2316 // happened so we can now change state to _thread_in_Java. | |
2317 | |
2318 | |
2319 __ set(_thread_in_Java, G3_scratch); | |
727 | 2320 __ st(G3_scratch, G2_thread, JavaThread::thread_state_offset()); |
0 | 2321 |
2322 | |
2323 Label no_reguard; | |
727 | 2324 __ ld(G2_thread, JavaThread::stack_guard_state_offset(), G3_scratch); |
3839 | 2325 __ cmp_and_br_short(G3_scratch, JavaThread::stack_guard_yellow_disabled, Assembler::notEqual, Assembler::pt, no_reguard); |
0 | 2326 |
2327 save_native_result(masm, ret_type, stack_slots); | |
2328 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)); | |
2329 __ delayed()->nop(); | |
2330 | |
2331 __ restore_thread(L7_thread_cache); // restore G2_thread | |
2332 restore_native_result(masm, ret_type, stack_slots); | |
2333 | |
2334 __ bind(no_reguard); | |
2335 | |
2336 // Handle possible exception (will unlock if necessary) | |
2337 | |
2338 // native result if any is live in freg or I0 (and I1 if long and 32bit vm) | |
2339 | |
2340 // Unlock | |
2341 if (method->is_synchronized()) { | |
2342 Label done; | |
2343 Register I2_ex_oop = I2; | |
2344 const Register L3_box = L3; | |
2345 // Get locked oop from the handle we passed to jni | |
2346 __ ld_ptr(L6_handle, 0, L4); | |
2347 __ add(SP, lock_offset+STACK_BIAS, L3_box); | |
2348 // Must save pending exception around the slow-path VM call. Since it's a | |
2349 // leaf call, the pending exception (if any) can be kept in a register. | |
2350 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), I2_ex_oop); | |
2351 // Now unlock | |
2352 // (Roop, Rmark, Rbox, Rscratch) | |
2353 __ compiler_unlock_object(L4, L1, L3_box, L2); | |
2354 __ br(Assembler::equal, false, Assembler::pt, done); | |
2355 __ delayed()-> add(SP, lock_offset+STACK_BIAS, L3_box); | |
2356 | |
2357 // save and restore any potential method result value around the unlocking | |
2358 // operation. Will save in I0 (or stack for FP returns). | |
2359 save_native_result(masm, ret_type, stack_slots); | |
2360 | |
2361 // Must clear pending-exception before re-entering the VM. Since this is | |
2362 // a leaf call, pending-exception-oop can be safely kept in a register. | |
2363 __ st_ptr(G0, G2_thread, in_bytes(Thread::pending_exception_offset())); | |
2364 | |
2365 // slow case of monitor enter. Inline a special case of call_VM that | |
2366 // disallows any pending_exception. | |
2367 __ mov(L3_box, O1); | |
2368 | |
2369 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_unlocking_C), relocInfo::runtime_call_type); | |
2370 __ delayed()->mov(L4, O0); // Need oop in O0 | |
2371 | |
2372 __ restore_thread(L7_thread_cache); // restore G2_thread | |
2373 | |
2374 #ifdef ASSERT | |
2375 { Label L; | |
2376 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), O0); | |
3839 | 2377 __ br_null_short(O0, Assembler::pt, L); |
0 | 2378 __ stop("no pending exception allowed on exit from IR::monitorexit"); |
2379 __ bind(L); | |
2380 } | |
2381 #endif | |
2382 restore_native_result(masm, ret_type, stack_slots); | |
2383 // check_forward_pending_exception jump to forward_exception if any pending | |
2384 // exception is set. The forward_exception routine expects to see the | |
2385 // exception in pending_exception and not in a register. Kind of clumsy, | |
2386 // since all folks who branch to forward_exception must have tested | |
2387 // pending_exception first and hence have it in a register already. | |
2388 __ st_ptr(I2_ex_oop, G2_thread, in_bytes(Thread::pending_exception_offset())); | |
2389 __ bind(done); | |
2390 } | |
2391 | |
2392 // Tell dtrace about this method exit | |
2393 { | |
2394 SkipIfEqual skip_if( | |
2395 masm, G3_scratch, &DTraceMethodProbes, Assembler::zero); | |
2396 save_native_result(masm, ret_type, stack_slots); | |
2397 __ set_oop_constant(JNIHandles::make_local(method()), O1); | |
2398 __ call_VM_leaf(L7_thread_cache, | |
2399 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
2400 G2_thread, O1); | |
2401 restore_native_result(masm, ret_type, stack_slots); | |
2402 } | |
2403 | |
2404 // Clear "last Java frame" SP and PC. | |
2405 __ verify_thread(); // G2_thread must be correct | |
2406 __ reset_last_Java_frame(); | |
2407 | |
2408 // Unpack oop result | |
2409 if (ret_type == T_OBJECT || ret_type == T_ARRAY) { | |
2410 Label L; | |
2411 __ addcc(G0, I0, G0); | |
2412 __ brx(Assembler::notZero, true, Assembler::pt, L); | |
2413 __ delayed()->ld_ptr(I0, 0, I0); | |
2414 __ mov(G0, I0); | |
2415 __ bind(L); | |
2416 __ verify_oop(I0); | |
2417 } | |
2418 | |
2419 // reset handle block | |
2420 __ ld_ptr(G2_thread, in_bytes(JavaThread::active_handles_offset()), L5); | |
2421 __ st_ptr(G0, L5, JNIHandleBlock::top_offset_in_bytes()); | |
2422 | |
2423 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), G3_scratch); | |
2424 check_forward_pending_exception(masm, G3_scratch); | |
2425 | |
2426 | |
2427 // Return | |
2428 | |
2429 #ifndef _LP64 | |
2430 if (ret_type == T_LONG) { | |
2431 | |
2432 // Must leave proper result in O0,O1 and G1 (c2/tiered only) | |
2433 __ sllx(I0, 32, G1); // Shift bits into high G1 | |
2434 __ srl (I1, 0, I1); // Zero extend O1 (harmless?) | |
2435 __ or3 (I1, G1, G1); // OR 64 bits into G1 | |
2436 } | |
2437 #endif | |
2438 | |
2439 __ ret(); | |
2440 __ delayed()->restore(); | |
2441 | |
2442 __ flush(); | |
2443 | |
2444 nmethod *nm = nmethod::new_native_nmethod(method, | |
2405
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2445 compile_id, |
0 | 2446 masm->code(), |
2447 vep_offset, | |
2448 frame_complete, | |
2449 stack_slots / VMRegImpl::slots_per_word, | |
2450 (is_static ? in_ByteSize(klass_offset) : in_ByteSize(receiver_offset)), | |
2451 in_ByteSize(lock_offset), | |
2452 oop_maps); | |
2453 return nm; | |
2454 | |
2455 } | |
2456 | |
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2457 #ifdef HAVE_DTRACE_H |
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2458 // --------------------------------------------------------------------------- |
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2459 // Generate a dtrace nmethod for a given signature. The method takes arguments |
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2460 // in the Java compiled code convention, marshals them to the native |
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2461 // abi and then leaves nops at the position you would expect to call a native |
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2462 // function. When the probe is enabled the nops are replaced with a trap |
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2463 // instruction that dtrace inserts and the trace will cause a notification |
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2464 // to dtrace. |
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2465 // |
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2466 // The probes are only able to take primitive types and java/lang/String as |
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2467 // arguments. No other java types are allowed. Strings are converted to utf8 |
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2468 // strings so that from dtrace point of view java strings are converted to C |
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2469 // strings. There is an arbitrary fixed limit on the total space that a method |
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2470 // can use for converting the strings. (256 chars per string in the signature). |
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2471 // So any java string larger then this is truncated. |
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2472 |
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2473 static int fp_offset[ConcreteRegisterImpl::number_of_registers] = { 0 }; |
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2474 static bool offsets_initialized = false; |
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2475 |
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2476 static VMRegPair reg64_to_VMRegPair(Register r) { |
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2477 VMRegPair ret; |
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2478 if (wordSize == 8) { |
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2479 ret.set2(r->as_VMReg()); |
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2480 } else { |
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2481 ret.set_pair(r->successor()->as_VMReg(), r->as_VMReg()); |
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2482 } |
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2483 return ret; |
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2484 } |
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2485 |
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2486 |
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2487 nmethod *SharedRuntime::generate_dtrace_nmethod( |
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2488 MacroAssembler *masm, methodHandle method) { |
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2489 |
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2490 |
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2491 // generate_dtrace_nmethod is guarded by a mutex so we are sure to |
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2492 // be single threaded in this method. |
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2493 assert(AdapterHandlerLibrary_lock->owned_by_self(), "must be"); |
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2494 |
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2495 // Fill in the signature array, for the calling-convention call. |
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2496 int total_args_passed = method->size_of_parameters(); |
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2497 |
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2498 BasicType* in_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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2499 VMRegPair *in_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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2500 |
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2501 // The signature we are going to use for the trap that dtrace will see |
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2502 // java/lang/String is converted. We drop "this" and any other object |
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2503 // is converted to NULL. (A one-slot java/lang/Long object reference |
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2504 // is converted to a two-slot long, which is why we double the allocation). |
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2505 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed * 2); |
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2506 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed * 2); |
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2507 |
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2508 int i=0; |
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2509 int total_strings = 0; |
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2510 int first_arg_to_pass = 0; |
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2511 int total_c_args = 0; |
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2512 |
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2513 // Skip the receiver as dtrace doesn't want to see it |
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2514 if( !method->is_static() ) { |
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2515 in_sig_bt[i++] = T_OBJECT; |
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2516 first_arg_to_pass = 1; |
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2517 } |
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2518 |
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2519 SignatureStream ss(method->signature()); |
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2520 for ( ; !ss.at_return_type(); ss.next()) { |
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2521 BasicType bt = ss.type(); |
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2522 in_sig_bt[i++] = bt; // Collect remaining bits of signature |
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2523 out_sig_bt[total_c_args++] = bt; |
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2524 if( bt == T_OBJECT) { |
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2525 Symbol* s = ss.as_symbol_or_null(); |
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2526 if (s == vmSymbols::java_lang_String()) { |
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2527 total_strings++; |
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2528 out_sig_bt[total_c_args-1] = T_ADDRESS; |
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2529 } else if (s == vmSymbols::java_lang_Boolean() || |
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2530 s == vmSymbols::java_lang_Byte()) { |
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2531 out_sig_bt[total_c_args-1] = T_BYTE; |
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2532 } else if (s == vmSymbols::java_lang_Character() || |
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2533 s == vmSymbols::java_lang_Short()) { |
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2534 out_sig_bt[total_c_args-1] = T_SHORT; |
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2535 } else if (s == vmSymbols::java_lang_Integer() || |
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2536 s == vmSymbols::java_lang_Float()) { |
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2537 out_sig_bt[total_c_args-1] = T_INT; |
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2538 } else if (s == vmSymbols::java_lang_Long() || |
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2539 s == vmSymbols::java_lang_Double()) { |
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2540 out_sig_bt[total_c_args-1] = T_LONG; |
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2541 out_sig_bt[total_c_args++] = T_VOID; |
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2542 } |
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2543 } else if ( bt == T_LONG || bt == T_DOUBLE ) { |
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2544 in_sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2545 // We convert double to long |
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2546 out_sig_bt[total_c_args-1] = T_LONG; |
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2547 out_sig_bt[total_c_args++] = T_VOID; |
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2548 } else if ( bt == T_FLOAT) { |
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2549 // We convert float to int |
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2550 out_sig_bt[total_c_args-1] = T_INT; |
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2551 } |
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2552 } |
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2553 |
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2554 assert(i==total_args_passed, "validly parsed signature"); |
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2555 |
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2556 // Now get the compiled-Java layout as input arguments |
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2557 int comp_args_on_stack; |
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2558 comp_args_on_stack = SharedRuntime::java_calling_convention( |
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2559 in_sig_bt, in_regs, total_args_passed, false); |
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2560 |
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2561 // We have received a description of where all the java arg are located |
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2562 // on entry to the wrapper. We need to convert these args to where |
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2563 // the a native (non-jni) function would expect them. To figure out |
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2564 // where they go we convert the java signature to a C signature and remove |
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2565 // T_VOID for any long/double we might have received. |
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2566 |
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2567 |
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2568 // Now figure out where the args must be stored and how much stack space |
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2569 // they require (neglecting out_preserve_stack_slots but space for storing |
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2570 // the 1st six register arguments). It's weird see int_stk_helper. |
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2571 // |
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2572 int out_arg_slots; |
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2573 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); |
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2574 |
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2575 // Calculate the total number of stack slots we will need. |
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2576 |
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2577 // First count the abi requirement plus all of the outgoing args |
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2578 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; |
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2579 |
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2580 // Plus a temp for possible converion of float/double/long register args |
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2581 |
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2582 int conversion_temp = stack_slots; |
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2583 stack_slots += 2; |
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2584 |
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2585 |
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2586 // Now space for the string(s) we must convert |
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2587 |
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2588 int string_locs = stack_slots; |
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2589 stack_slots += total_strings * |
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2590 (max_dtrace_string_size / VMRegImpl::stack_slot_size); |
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2591 |
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2592 // Ok The space we have allocated will look like: |
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2593 // |
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2594 // |
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2595 // FP-> | | |
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2596 // |---------------------| |
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2597 // | string[n] | |
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2598 // |---------------------| <- string_locs[n] |
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2599 // | string[n-1] | |
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2600 // |---------------------| <- string_locs[n-1] |
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2601 // | ... | |
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2602 // | ... | |
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2603 // |---------------------| <- string_locs[1] |
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2604 // | string[0] | |
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2605 // |---------------------| <- string_locs[0] |
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2606 // | temp | |
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2607 // |---------------------| <- conversion_temp |
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2608 // | outbound memory | |
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2609 // | based arguments | |
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2610 // | | |
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2611 // |---------------------| |
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2612 // | | |
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2613 // SP-> | out_preserved_slots | |
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2614 // |
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2615 // |
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2616 |
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2617 // Now compute actual number of stack words we need rounding to make |
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2618 // stack properly aligned. |
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2619 stack_slots = round_to(stack_slots, 4 * VMRegImpl::slots_per_word); |
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2620 |
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2621 int stack_size = stack_slots * VMRegImpl::stack_slot_size; |
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2622 |
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2623 intptr_t start = (intptr_t)__ pc(); |
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2624 |
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2625 // First thing make an ic check to see if we should even be here |
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2626 |
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2627 { |
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2628 Label L; |
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2629 const Register temp_reg = G3_scratch; |
727 | 2630 AddressLiteral ic_miss(SharedRuntime::get_ic_miss_stub()); |
116
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2631 __ verify_oop(O0); |
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2632 __ ld_ptr(O0, oopDesc::klass_offset_in_bytes(), temp_reg); |
3839 | 2633 __ cmp_and_brx_short(temp_reg, G5_inline_cache_reg, Assembler::equal, Assembler::pt, L); |
116
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2634 |
727 | 2635 __ jump_to(ic_miss, temp_reg); |
116
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2636 __ delayed()->nop(); |
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2637 __ align(CodeEntryAlignment); |
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2638 __ bind(L); |
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2639 } |
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2640 |
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2641 int vep_offset = ((intptr_t)__ pc()) - start; |
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2642 |
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2643 |
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2644 // The instruction at the verified entry point must be 5 bytes or longer |
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2645 // because it can be patched on the fly by make_non_entrant. The stack bang |
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2646 // instruction fits that requirement. |
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2647 |
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2648 // Generate stack overflow check before creating frame |
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2649 __ generate_stack_overflow_check(stack_size); |
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2650 |
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2651 assert(((intptr_t)__ pc() - start - vep_offset) >= 5, |
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2652 "valid size for make_non_entrant"); |
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2653 |
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2654 // Generate a new frame for the wrapper. |
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2655 __ save(SP, -stack_size, SP); |
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2656 |
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2657 // Frame is now completed as far a size and linkage. |
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2658 |
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2659 int frame_complete = ((intptr_t)__ pc()) - start; |
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2660 |
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2661 #ifdef ASSERT |
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2662 bool reg_destroyed[RegisterImpl::number_of_registers]; |
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2663 bool freg_destroyed[FloatRegisterImpl::number_of_registers]; |
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2664 for ( int r = 0 ; r < RegisterImpl::number_of_registers ; r++ ) { |
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2665 reg_destroyed[r] = false; |
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2666 } |
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2667 for ( int f = 0 ; f < FloatRegisterImpl::number_of_registers ; f++ ) { |
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2668 freg_destroyed[f] = false; |
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2669 } |
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2670 |
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2671 #endif /* ASSERT */ |
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2672 |
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2673 VMRegPair zero; |
176
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2674 const Register g0 = G0; // without this we get a compiler warning (why??) |
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2675 zero.set2(g0->as_VMReg()); |
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2676 |
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2677 int c_arg, j_arg; |
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2678 |
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2679 Register conversion_off = noreg; |
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2680 |
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2681 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2682 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2683 |
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2684 VMRegPair src = in_regs[j_arg]; |
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2685 VMRegPair dst = out_regs[c_arg]; |
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2686 |
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2687 #ifdef ASSERT |
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2688 if (src.first()->is_Register()) { |
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2689 assert(!reg_destroyed[src.first()->as_Register()->encoding()], "ack!"); |
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2690 } else if (src.first()->is_FloatRegister()) { |
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2691 assert(!freg_destroyed[src.first()->as_FloatRegister()->encoding( |
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2692 FloatRegisterImpl::S)], "ack!"); |
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2693 } |
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2694 if (dst.first()->is_Register()) { |
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2695 reg_destroyed[dst.first()->as_Register()->encoding()] = true; |
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2696 } else if (dst.first()->is_FloatRegister()) { |
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2697 freg_destroyed[dst.first()->as_FloatRegister()->encoding( |
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2698 FloatRegisterImpl::S)] = true; |
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2699 } |
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2700 #endif /* ASSERT */ |
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2701 |
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2702 switch (in_sig_bt[j_arg]) { |
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2703 case T_ARRAY: |
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2704 case T_OBJECT: |
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2705 { |
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2706 if (out_sig_bt[c_arg] == T_BYTE || out_sig_bt[c_arg] == T_SHORT || |
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2707 out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
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2708 // need to unbox a one-slot value |
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2709 Register in_reg = L0; |
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2710 Register tmp = L2; |
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2711 if ( src.first()->is_reg() ) { |
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2712 in_reg = src.first()->as_Register(); |
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2713 } else { |
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2714 assert(Assembler::is_simm13(reg2offset(src.first()) + STACK_BIAS), |
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2715 "must be"); |
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2716 __ ld_ptr(FP, reg2offset(src.first()) + STACK_BIAS, in_reg); |
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2717 } |
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2718 // If the final destination is an acceptable register |
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2719 if ( dst.first()->is_reg() ) { |
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2720 if ( dst.is_single_phys_reg() || out_sig_bt[c_arg] != T_LONG ) { |
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2721 tmp = dst.first()->as_Register(); |
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2722 } |
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2723 } |
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2724 |
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2725 Label skipUnbox; |
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2726 if ( wordSize == 4 && out_sig_bt[c_arg] == T_LONG ) { |
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2727 __ mov(G0, tmp->successor()); |
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2728 } |
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2729 __ br_null(in_reg, true, Assembler::pn, skipUnbox); |
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2730 __ delayed()->mov(G0, tmp); |
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2731 |
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2732 BasicType bt = out_sig_bt[c_arg]; |
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2733 int box_offset = java_lang_boxing_object::value_offset_in_bytes(bt); |
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2734 switch (bt) { |
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2735 case T_BYTE: |
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2736 __ ldub(in_reg, box_offset, tmp); break; |
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2737 case T_SHORT: |
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2738 __ lduh(in_reg, box_offset, tmp); break; |
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2739 case T_INT: |
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|
2740 __ ld(in_reg, box_offset, tmp); break; |
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113
diff
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|
2741 case T_LONG: |
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diff
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|
2742 __ ld_long(in_reg, box_offset, tmp); break; |
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113
diff
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|
2743 default: ShouldNotReachHere(); |
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diff
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|
2744 } |
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kamg
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113
diff
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|
2745 |
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diff
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|
2746 __ bind(skipUnbox); |
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diff
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|
2747 // If tmp wasn't final destination copy to final destination |
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|
2748 if (tmp == L2) { |
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|
2749 VMRegPair tmp_as_VM = reg64_to_VMRegPair(L2); |
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|
2750 if (out_sig_bt[c_arg] == T_LONG) { |
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|
2751 long_move(masm, tmp_as_VM, dst); |
018d5b58dd4f
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diff
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|
2752 } else { |
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diff
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|
2753 move32_64(masm, tmp_as_VM, out_regs[c_arg]); |
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kamg
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diff
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|
2754 } |
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kamg
parents:
113
diff
changeset
|
2755 } |
018d5b58dd4f
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parents:
113
diff
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|
2756 if (out_sig_bt[c_arg] == T_LONG) { |
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|
2757 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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|
2758 ++c_arg; // move over the T_VOID to keep the loop indices in sync |
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kamg
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diff
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|
2759 } |
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113
diff
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|
2760 } else if (out_sig_bt[c_arg] == T_ADDRESS) { |
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kamg
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113
diff
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|
2761 Register s = |
018d5b58dd4f
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diff
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|
2762 src.first()->is_reg() ? src.first()->as_Register() : L2; |
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kamg
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|
2763 Register d = |
018d5b58dd4f
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diff
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|
2764 dst.first()->is_reg() ? dst.first()->as_Register() : L2; |
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kamg
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diff
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|
2765 |
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diff
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|
2766 // We store the oop now so that the conversion pass can reach |
018d5b58dd4f
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|
2767 // while in the inner frame. This will be the only store if |
018d5b58dd4f
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|
2768 // the oop is NULL. |
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diff
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|
2769 if (s != L2) { |
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kamg
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113
diff
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|
2770 // src is register |
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113
diff
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|
2771 if (d != L2) { |
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kamg
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113
diff
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|
2772 // dst is register |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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113
diff
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|
2773 __ mov(s, d); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2774 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2775 assert(Assembler::is_simm13(reg2offset(dst.first()) + |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2776 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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|
2777 __ st_ptr(s, SP, reg2offset(dst.first()) + STACK_BIAS); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2778 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2779 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2780 // src not a register |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2781 assert(Assembler::is_simm13(reg2offset(src.first()) + |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2782 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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|
2783 __ 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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|
2784 if (d == L2) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2785 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
|
2786 STACK_BIAS), "must be"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2787 __ 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
|
2788 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2789 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2790 } 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
changeset
|
2791 // Convert the arg to NULL |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2792 if (dst.first()->is_reg()) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2793 __ mov(G0, dst.first()->as_Register()); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2794 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2795 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
|
2796 STACK_BIAS), "must be"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2797 __ 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
|
2798 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2799 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2800 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2801 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2802 case T_VOID: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2803 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2804 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2805 case T_FLOAT: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2806 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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|
2807 // Stack to stack/reg is simple |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2808 move32_64(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2809 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2810 if (dst.first()->is_reg()) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2811 // freg -> reg |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2812 int off = |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2813 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
|
2814 Register d = dst.first()->as_Register(); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2815 if (Assembler::is_simm13(off)) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2816 __ 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
|
2817 SP, off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2818 __ ld(SP, off, d); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2819 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2820 if (conversion_off == noreg) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2821 __ set(off, L6); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2822 conversion_off = L6; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2823 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2824 __ 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
|
2825 SP, conversion_off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2826 __ ld(SP, conversion_off , d); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2827 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2828 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2829 // freg -> mem |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2830 int off = STACK_BIAS + reg2offset(dst.first()); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2831 if (Assembler::is_simm13(off)) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2832 __ 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
|
2833 SP, off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2834 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2835 if (conversion_off == noreg) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2836 __ set(off, L6); |
018d5b58dd4f
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kamg
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113
diff
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|
2837 conversion_off = L6; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2838 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2839 __ 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
|
2840 SP, conversion_off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2841 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2842 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2843 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2844 break; |
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 case T_DOUBLE: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2847 assert( j_arg + 1 < total_args_passed && |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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parents:
113
diff
changeset
|
2848 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
|
2849 out_sig_bt[c_arg+1] == T_VOID, "bad arg list"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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113
diff
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|
2850 if (src.first()->is_stack()) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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parents:
113
diff
changeset
|
2851 // Stack to stack/reg is simple |
018d5b58dd4f
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113
diff
changeset
|
2852 long_move(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2853 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2854 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
|
2855 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2856 // 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
|
2857 // 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
|
2858 |
018d5b58dd4f
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|
2859 if (!d->is_even() && wordSize == 4) { |
018d5b58dd4f
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kamg
parents:
113
diff
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|
2860 d = L2; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2861 } |
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kamg
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113
diff
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|
2862 int off = STACK_BIAS + conversion_temp * VMRegImpl::stack_slot_size; |
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kamg
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diff
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|
2863 if (Assembler::is_simm13(off)) { |
018d5b58dd4f
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diff
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|
2864 __ stf(FloatRegisterImpl::D, src.first()->as_FloatRegister(), |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2865 SP, off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2866 __ ld_long(SP, off, d); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2867 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2868 if (conversion_off == noreg) { |
018d5b58dd4f
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parents:
113
diff
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|
2869 __ set(off, L6); |
018d5b58dd4f
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kamg
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113
diff
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|
2870 conversion_off = L6; |
018d5b58dd4f
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kamg
parents:
113
diff
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|
2871 } |
018d5b58dd4f
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parents:
113
diff
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|
2872 __ stf(FloatRegisterImpl::D, src.first()->as_FloatRegister(), |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2873 SP, conversion_off); |
018d5b58dd4f
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kamg
parents:
113
diff
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|
2874 __ ld_long(SP, conversion_off, d); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2875 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2876 if (d == L2) { |
018d5b58dd4f
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diff
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|
2877 long_move(masm, reg64_to_VMRegPair(L2), dst); |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2878 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2879 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2880 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2881 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2882 case T_LONG : |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2883 // 32bit can't do a split move of something like g1 -> O0, O1 |
018d5b58dd4f
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|
2884 // so use a memory temp |
018d5b58dd4f
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diff
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|
2885 if (src.is_single_phys_reg() && wordSize == 4) { |
018d5b58dd4f
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kamg
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|
2886 Register tmp = L2; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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|
2887 if (dst.first()->is_reg() && |
018d5b58dd4f
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kamg
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|
2888 (wordSize == 8 || dst.first()->as_Register()->is_even())) { |
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kamg
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|
2889 tmp = dst.first()->as_Register(); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2890 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2891 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2892 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
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|
2893 if (Assembler::is_simm13(off)) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2894 __ stx(src.first()->as_Register(), SP, off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2895 __ ld_long(SP, off, tmp); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2896 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2897 if (conversion_off == noreg) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2898 __ set(off, L6); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2899 conversion_off = L6; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2900 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2901 __ stx(src.first()->as_Register(), SP, conversion_off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2902 __ ld_long(SP, conversion_off, tmp); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2903 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2904 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2905 if (tmp == L2) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2906 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
|
2907 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2908 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2909 long_move(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2910 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2911 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2912 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2913 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2914 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2915 default: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2916 move32_64(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2917 } |
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 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2920 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2921 // If we have any strings we must store any register based arg to the stack |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2922 // This includes any still live xmm registers too. |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2923 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2924 if (total_strings > 0 ) { |
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 // protect all the arg registers |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2927 __ save_frame(0); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2928 __ mov(G2_thread, L7_thread_cache); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2929 const Register L2_string_off = L2; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2930 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2931 // Get first string offset |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2932 __ set(string_locs * VMRegImpl::stack_slot_size, L2_string_off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2933 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2934 for (c_arg = 0 ; c_arg < total_c_args ; c_arg++ ) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2935 if (out_sig_bt[c_arg] == T_ADDRESS) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2936 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2937 VMRegPair dst = out_regs[c_arg]; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2938 const Register d = dst.first()->is_reg() ? |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2939 dst.first()->as_Register()->after_save() : noreg; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2940 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2941 // It's a string the oop and it was already copied to the out arg |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2942 // position |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2943 if (d != noreg) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2944 __ mov(d, O0); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2945 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2946 assert(Assembler::is_simm13(reg2offset(dst.first()) + STACK_BIAS), |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2947 "must be"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2948 __ ld_ptr(FP, reg2offset(dst.first()) + STACK_BIAS, O0); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2949 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2950 Label skip; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2951 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2952 __ br_null(O0, false, Assembler::pn, skip); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2953 __ delayed()->add(FP, L2_string_off, O1); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2954 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2955 if (d != noreg) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
2956 __ mov(O1, d); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2957 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2958 assert(Assembler::is_simm13(reg2offset(dst.first()) + STACK_BIAS), |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2959 "must be"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
changeset
|
2960 __ st_ptr(O1, FP, reg2offset(dst.first()) + STACK_BIAS); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2961 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2962 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2963 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::get_utf), |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2964 relocInfo::runtime_call_type); |
018d5b58dd4f
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kamg
parents:
113
diff
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|
2965 __ delayed()->add(L2_string_off, max_dtrace_string_size, L2_string_off); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2966 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2967 __ bind(skip); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2968 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2969 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2970 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2971 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2972 __ mov(L7_thread_cache, G2_thread); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2973 __ restore(); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2974 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2975 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2976 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2977 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2978 // Ok now we are done. Need to place the nop that dtrace wants in order to |
018d5b58dd4f
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kamg
parents:
113
diff
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|
2979 // patch in the trap |
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2980 |
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2981 int patch_offset = ((intptr_t)__ pc()) - start; |
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2982 |
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2983 __ nop(); |
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2984 |
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2985 |
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2986 // Return |
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2987 |
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2988 __ ret(); |
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2989 __ delayed()->restore(); |
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2990 |
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2991 __ flush(); |
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2992 |
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2993 nmethod *nm = nmethod::new_dtrace_nmethod( |
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2994 method, masm->code(), vep_offset, patch_offset, frame_complete, |
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2995 stack_slots / VMRegImpl::slots_per_word); |
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2996 return nm; |
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2997 |
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2998 } |
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2999 |
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3000 #endif // HAVE_DTRACE_H |
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3001 |
0 | 3002 // this function returns the adjust size (in number of words) to a c2i adapter |
3003 // activation for use during deoptimization | |
3004 int Deoptimization::last_frame_adjust(int callee_parameters, int callee_locals) { | |
3005 assert(callee_locals >= callee_parameters, | |
3006 "test and remove; got more parms than locals"); | |
3007 if (callee_locals < callee_parameters) | |
3008 return 0; // No adjustment for negative locals | |
1506 | 3009 int diff = (callee_locals - callee_parameters) * Interpreter::stackElementWords; |
0 | 3010 return round_to(diff, WordsPerLong); |
3011 } | |
3012 | |
3013 // "Top of Stack" slots that may be unused by the calling convention but must | |
3014 // otherwise be preserved. | |
3015 // On Intel these are not necessary and the value can be zero. | |
3016 // On Sparc this describes the words reserved for storing a register window | |
3017 // when an interrupt occurs. | |
3018 uint SharedRuntime::out_preserve_stack_slots() { | |
3019 return frame::register_save_words * VMRegImpl::slots_per_word; | |
3020 } | |
3021 | |
3022 static void gen_new_frame(MacroAssembler* masm, bool deopt) { | |
3023 // | |
3024 // Common out the new frame generation for deopt and uncommon trap | |
3025 // | |
3026 Register G3pcs = G3_scratch; // Array of new pcs (input) | |
3027 Register Oreturn0 = O0; | |
3028 Register Oreturn1 = O1; | |
3029 Register O2UnrollBlock = O2; | |
3030 Register O3array = O3; // Array of frame sizes (input) | |
3031 Register O4array_size = O4; // number of frames (input) | |
3032 Register O7frame_size = O7; // number of frames (input) | |
3033 | |
3034 __ ld_ptr(O3array, 0, O7frame_size); | |
3035 __ sub(G0, O7frame_size, O7frame_size); | |
3036 __ save(SP, O7frame_size, SP); | |
3037 __ ld_ptr(G3pcs, 0, I7); // load frame's new pc | |
3038 | |
3039 #ifdef ASSERT | |
3040 // make sure that the frames are aligned properly | |
3041 #ifndef _LP64 | |
3042 __ btst(wordSize*2-1, SP); | |
3043 __ breakpoint_trap(Assembler::notZero); | |
3044 #endif | |
3045 #endif | |
3046 | |
3047 // Deopt needs to pass some extra live values from frame to frame | |
3048 | |
3049 if (deopt) { | |
3050 __ mov(Oreturn0->after_save(), Oreturn0); | |
3051 __ mov(Oreturn1->after_save(), Oreturn1); | |
3052 } | |
3053 | |
3054 __ mov(O4array_size->after_save(), O4array_size); | |
3055 __ sub(O4array_size, 1, O4array_size); | |
3056 __ mov(O3array->after_save(), O3array); | |
3057 __ mov(O2UnrollBlock->after_save(), O2UnrollBlock); | |
3058 __ add(G3pcs, wordSize, G3pcs); // point to next pc value | |
3059 | |
3060 #ifdef ASSERT | |
3061 // trash registers to show a clear pattern in backtraces | |
3062 __ set(0xDEAD0000, I0); | |
3063 __ add(I0, 2, I1); | |
3064 __ add(I0, 4, I2); | |
3065 __ add(I0, 6, I3); | |
3066 __ add(I0, 8, I4); | |
3067 // Don't touch I5 could have valuable savedSP | |
3068 __ set(0xDEADBEEF, L0); | |
3069 __ mov(L0, L1); | |
3070 __ mov(L0, L2); | |
3071 __ mov(L0, L3); | |
3072 __ mov(L0, L4); | |
3073 __ mov(L0, L5); | |
3074 | |
3075 // trash the return value as there is nothing to return yet | |
3076 __ set(0xDEAD0001, O7); | |
3077 #endif | |
3078 | |
3079 __ mov(SP, O5_savedSP); | |
3080 } | |
3081 | |
3082 | |
3083 static void make_new_frames(MacroAssembler* masm, bool deopt) { | |
3084 // | |
3085 // loop through the UnrollBlock info and create new frames | |
3086 // | |
3087 Register G3pcs = G3_scratch; | |
3088 Register Oreturn0 = O0; | |
3089 Register Oreturn1 = O1; | |
3090 Register O2UnrollBlock = O2; | |
3091 Register O3array = O3; | |
3092 Register O4array_size = O4; | |
3093 Label loop; | |
3094 | |
3095 // Before we make new frames, check to see if stack is available. | |
3096 // Do this after the caller's return address is on top of stack | |
3097 if (UseStackBanging) { | |
3098 // Get total frame size for interpreted frames | |
727 | 3099 __ ld(O2UnrollBlock, Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes(), O4); |
0 | 3100 __ bang_stack_size(O4, O3, G3_scratch); |
3101 } | |
3102 | |
727 | 3103 __ ld(O2UnrollBlock, Deoptimization::UnrollBlock::number_of_frames_offset_in_bytes(), O4array_size); |
3104 __ ld_ptr(O2UnrollBlock, Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes(), G3pcs); | |
3105 __ ld_ptr(O2UnrollBlock, Deoptimization::UnrollBlock::frame_sizes_offset_in_bytes(), O3array); | |
0 | 3106 |
3107 // Adjust old interpreter frame to make space for new frame's extra java locals | |
3108 // | |
3109 // We capture the original sp for the transition frame only because it is needed in | |
3110 // order to properly calculate interpreter_sp_adjustment. Even though in real life | |
3111 // every interpreter frame captures a savedSP it is only needed at the transition | |
3112 // (fortunately). If we had to have it correct everywhere then we would need to | |
3113 // be told the sp_adjustment for each frame we create. If the frame size array | |
3114 // were to have twice the frame count entries then we could have pairs [sp_adjustment, frame_size] | |
3115 // for each frame we create and keep up the illusion every where. | |
3116 // | |
3117 | |
727 | 3118 __ ld(O2UnrollBlock, Deoptimization::UnrollBlock::caller_adjustment_offset_in_bytes(), O7); |
0 | 3119 __ mov(SP, O5_savedSP); // remember initial sender's original sp before adjustment |
3120 __ sub(SP, O7, SP); | |
3121 | |
3122 #ifdef ASSERT | |
3123 // make sure that there is at least one entry in the array | |
3124 __ tst(O4array_size); | |
3125 __ breakpoint_trap(Assembler::zero); | |
3126 #endif | |
3127 | |
3128 // Now push the new interpreter frames | |
3129 __ bind(loop); | |
3130 | |
3131 // allocate a new frame, filling the registers | |
3132 | |
3133 gen_new_frame(masm, deopt); // allocate an interpreter frame | |
3134 | |
3839 | 3135 __ cmp_zero_and_br(Assembler::notZero, O4array_size, loop); |
0 | 3136 __ delayed()->add(O3array, wordSize, O3array); |
3137 __ ld_ptr(G3pcs, 0, O7); // load final frame new pc | |
3138 | |
3139 } | |
3140 | |
3141 //------------------------------generate_deopt_blob---------------------------- | |
3142 // Ought to generate an ideal graph & compile, but here's some SPARC ASM | |
3143 // instead. | |
3144 void SharedRuntime::generate_deopt_blob() { | |
3145 // allocate space for the code | |
3146 ResourceMark rm; | |
3147 // setup code generation tools | |
3148 int pad = VerifyThread ? 512 : 0;// Extra slop space for more verify code | |
3149 #ifdef _LP64 | |
3150 CodeBuffer buffer("deopt_blob", 2100+pad, 512); | |
3151 #else | |
3152 // Measured 8/7/03 at 1212 in 32bit debug build (no VerifyThread) | |
3153 // Measured 8/7/03 at 1396 in 32bit debug build (VerifyThread) | |
3154 CodeBuffer buffer("deopt_blob", 1600+pad, 512); | |
3155 #endif /* _LP64 */ | |
3156 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3157 FloatRegister Freturn0 = F0; | |
3158 Register Greturn1 = G1; | |
3159 Register Oreturn0 = O0; | |
3160 Register Oreturn1 = O1; | |
3161 Register O2UnrollBlock = O2; | |
1037 | 3162 Register L0deopt_mode = L0; |
3163 Register G4deopt_mode = G4_scratch; | |
0 | 3164 int frame_size_words; |
727 | 3165 Address saved_Freturn0_addr(FP, -sizeof(double) + STACK_BIAS); |
0 | 3166 #if !defined(_LP64) && defined(COMPILER2) |
727 | 3167 Address saved_Greturn1_addr(FP, -sizeof(double) -sizeof(jlong) + STACK_BIAS); |
0 | 3168 #endif |
3169 Label cont; | |
3170 | |
3171 OopMapSet *oop_maps = new OopMapSet(); | |
3172 | |
3173 // | |
3174 // This is the entry point for code which is returning to a de-optimized | |
3175 // frame. | |
3176 // The steps taken by this frame are as follows: | |
3177 // - push a dummy "register_save" and save the return values (O0, O1, F0/F1, G1) | |
3178 // and all potentially live registers (at a pollpoint many registers can be live). | |
3179 // | |
3180 // - call the C routine: Deoptimization::fetch_unroll_info (this function | |
3181 // returns information about the number and size of interpreter frames | |
3182 // which are equivalent to the frame which is being deoptimized) | |
3183 // - deallocate the unpack frame, restoring only results values. Other | |
3184 // volatile registers will now be captured in the vframeArray as needed. | |
3185 // - deallocate the deoptimization frame | |
3186 // - in a loop using the information returned in the previous step | |
3187 // push new interpreter frames (take care to propagate the return | |
3188 // values through each new frame pushed) | |
3189 // - create a dummy "unpack_frame" and save the return values (O0, O1, F0) | |
3190 // - call the C routine: Deoptimization::unpack_frames (this function | |
3191 // lays out values on the interpreter frame which was just created) | |
3192 // - deallocate the dummy unpack_frame | |
3193 // - ensure that all the return values are correctly set and then do | |
3194 // a return to the interpreter entry point | |
3195 // | |
3196 // Refer to the following methods for more information: | |
3197 // - Deoptimization::fetch_unroll_info | |
3198 // - Deoptimization::unpack_frames | |
3199 | |
3200 OopMap* map = NULL; | |
3201 | |
3202 int start = __ offset(); | |
3203 | |
3204 // restore G2, the trampoline destroyed it | |
3205 __ get_thread(); | |
3206 | |
3207 // On entry we have been called by the deoptimized nmethod with a call that | |
3208 // replaced the original call (or safepoint polling location) so the deoptimizing | |
3209 // pc is now in O7. Return values are still in the expected places | |
3210 | |
3211 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
3839 | 3212 __ ba(cont); |
1037 | 3213 __ delayed()->mov(Deoptimization::Unpack_deopt, L0deopt_mode); |
0 | 3214 |
3215 int exception_offset = __ offset() - start; | |
3216 | |
3217 // restore G2, the trampoline destroyed it | |
3218 __ get_thread(); | |
3219 | |
3220 // On entry we have been jumped to by the exception handler (or exception_blob | |
3221 // for server). O0 contains the exception oop and O7 contains the original | |
3222 // exception pc. So if we push a frame here it will look to the | |
3223 // stack walking code (fetch_unroll_info) just like a normal call so | |
3224 // state will be extracted normally. | |
3225 | |
3226 // save exception oop in JavaThread and fall through into the | |
3227 // exception_in_tls case since they are handled in same way except | |
3228 // for where the pending exception is kept. | |
727 | 3229 __ st_ptr(Oexception, G2_thread, JavaThread::exception_oop_offset()); |
0 | 3230 |
3231 // | |
3232 // Vanilla deoptimization with an exception pending in exception_oop | |
3233 // | |
3234 int exception_in_tls_offset = __ offset() - start; | |
3235 | |
3236 // No need to update oop_map as each call to save_live_registers will produce identical oopmap | |
3237 (void) RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
3238 | |
3239 // Restore G2_thread | |
3240 __ get_thread(); | |
3241 | |
3242 #ifdef ASSERT | |
3243 { | |
3244 // verify that there is really an exception oop in exception_oop | |
3245 Label has_exception; | |
727 | 3246 __ ld_ptr(G2_thread, JavaThread::exception_oop_offset(), Oexception); |
3839 | 3247 __ br_notnull_short(Oexception, Assembler::pt, has_exception); |
0 | 3248 __ stop("no exception in thread"); |
3249 __ bind(has_exception); | |
3250 | |
3251 // verify that there is no pending exception | |
3252 Label no_pending_exception; | |
727 | 3253 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
0 | 3254 __ ld_ptr(exception_addr, Oexception); |
3839 | 3255 __ br_null_short(Oexception, Assembler::pt, no_pending_exception); |
0 | 3256 __ stop("must not have pending exception here"); |
3257 __ bind(no_pending_exception); | |
3258 } | |
3259 #endif | |
3260 | |
3839 | 3261 __ ba(cont); |
1037 | 3262 __ delayed()->mov(Deoptimization::Unpack_exception, L0deopt_mode);; |
0 | 3263 |
3264 // | |
3265 // Reexecute entry, similar to c2 uncommon trap | |
3266 // | |
3267 int reexecute_offset = __ offset() - start; | |
3268 | |
3269 // No need to update oop_map as each call to save_live_registers will produce identical oopmap | |
3270 (void) RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
3271 | |
1037 | 3272 __ mov(Deoptimization::Unpack_reexecute, L0deopt_mode); |
0 | 3273 |
3274 __ bind(cont); | |
3275 | |
3276 __ set_last_Java_frame(SP, noreg); | |
3277 | |
3278 // do the call by hand so we can get the oopmap | |
3279 | |
3280 __ mov(G2_thread, L7_thread_cache); | |
3281 __ call(CAST_FROM_FN_PTR(address, Deoptimization::fetch_unroll_info), relocInfo::runtime_call_type); | |
3282 __ delayed()->mov(G2_thread, O0); | |
3283 | |
3284 // Set an oopmap for the call site this describes all our saved volatile registers | |
3285 | |
3286 oop_maps->add_gc_map( __ offset()-start, map); | |
3287 | |
3288 __ mov(L7_thread_cache, G2_thread); | |
3289 | |
3290 __ reset_last_Java_frame(); | |
3291 | |
3292 // NOTE: we know that only O0/O1 will be reloaded by restore_result_registers | |
3293 // so this move will survive | |
3294 | |
1037 | 3295 __ mov(L0deopt_mode, G4deopt_mode); |
0 | 3296 |
3297 __ mov(O0, O2UnrollBlock->after_save()); | |
3298 | |
3299 RegisterSaver::restore_result_registers(masm); | |
3300 | |
3301 Label noException; | |
3839 | 3302 __ cmp_and_br_short(G4deopt_mode, Deoptimization::Unpack_exception, Assembler::notEqual, Assembler::pt, noException); |
0 | 3303 |
3304 // Move the pending exception from exception_oop to Oexception so | |
3305 // the pending exception will be picked up the interpreter. | |
3306 __ ld_ptr(G2_thread, in_bytes(JavaThread::exception_oop_offset()), Oexception); | |
3307 __ st_ptr(G0, G2_thread, in_bytes(JavaThread::exception_oop_offset())); | |
3308 __ bind(noException); | |
3309 | |
3310 // deallocate the deoptimization frame taking care to preserve the return values | |
3311 __ mov(Oreturn0, Oreturn0->after_save()); | |
3312 __ mov(Oreturn1, Oreturn1->after_save()); | |
3313 __ mov(O2UnrollBlock, O2UnrollBlock->after_save()); | |
3314 __ restore(); | |
3315 | |
3316 // Allocate new interpreter frame(s) and possible c2i adapter frame | |
3317 | |
3318 make_new_frames(masm, true); | |
3319 | |
3320 // push a dummy "unpack_frame" taking care of float return values and | |
3321 // call Deoptimization::unpack_frames to have the unpacker layout | |
3322 // information in the interpreter frames just created and then return | |
3323 // to the interpreter entry point | |
3324 __ save(SP, -frame_size_words*wordSize, SP); | |
3325 __ stf(FloatRegisterImpl::D, Freturn0, saved_Freturn0_addr); | |
3326 #if !defined(_LP64) | |
3327 #if defined(COMPILER2) | |
1783 | 3328 // 32-bit 1-register longs return longs in G1 |
3329 __ stx(Greturn1, saved_Greturn1_addr); | |
0 | 3330 #endif |
3331 __ set_last_Java_frame(SP, noreg); | |
1037 | 3332 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames), G2_thread, G4deopt_mode); |
0 | 3333 #else |
3334 // LP64 uses g4 in set_last_Java_frame | |
1037 | 3335 __ mov(G4deopt_mode, O1); |
0 | 3336 __ set_last_Java_frame(SP, G0); |
3337 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames), G2_thread, O1); | |
3338 #endif | |
3339 __ reset_last_Java_frame(); | |
3340 __ ldf(FloatRegisterImpl::D, saved_Freturn0_addr, Freturn0); | |
3341 | |
3342 #if !defined(_LP64) && defined(COMPILER2) | |
3343 // In 32 bit, C2 returns longs in G1 so restore the saved G1 into | |
1783 | 3344 // I0/I1 if the return value is long. |
3345 Label not_long; | |
3839 | 3346 __ cmp_and_br_short(O0,T_LONG, Assembler::notEqual, Assembler::pt, not_long); |
1783 | 3347 __ ldd(saved_Greturn1_addr,I0); |
3348 __ bind(not_long); | |
0 | 3349 #endif |
3350 __ ret(); | |
3351 __ delayed()->restore(); | |
3352 | |
3353 masm->flush(); | |
3354 _deopt_blob = DeoptimizationBlob::create(&buffer, oop_maps, 0, exception_offset, reexecute_offset, frame_size_words); | |
3355 _deopt_blob->set_unpack_with_exception_in_tls_offset(exception_in_tls_offset); | |
3356 } | |
3357 | |
3358 #ifdef COMPILER2 | |
3359 | |
3360 //------------------------------generate_uncommon_trap_blob-------------------- | |
3361 // Ought to generate an ideal graph & compile, but here's some SPARC ASM | |
3362 // instead. | |
3363 void SharedRuntime::generate_uncommon_trap_blob() { | |
3364 // allocate space for the code | |
3365 ResourceMark rm; | |
3366 // setup code generation tools | |
3367 int pad = VerifyThread ? 512 : 0; | |
3368 #ifdef _LP64 | |
3369 CodeBuffer buffer("uncommon_trap_blob", 2700+pad, 512); | |
3370 #else | |
3371 // Measured 8/7/03 at 660 in 32bit debug build (no VerifyThread) | |
3372 // Measured 8/7/03 at 1028 in 32bit debug build (VerifyThread) | |
3373 CodeBuffer buffer("uncommon_trap_blob", 2000+pad, 512); | |
3374 #endif | |
3375 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3376 Register O2UnrollBlock = O2; | |
3377 Register O2klass_index = O2; | |
3378 | |
3379 // | |
3380 // This is the entry point for all traps the compiler takes when it thinks | |
3381 // it cannot handle further execution of compilation code. The frame is | |
3382 // deoptimized in these cases and converted into interpreter frames for | |
3383 // execution | |
3384 // The steps taken by this frame are as follows: | |
3385 // - push a fake "unpack_frame" | |
3386 // - call the C routine Deoptimization::uncommon_trap (this function | |
3387 // packs the current compiled frame into vframe arrays and returns | |
3388 // information about the number and size of interpreter frames which | |
3389 // are equivalent to the frame which is being deoptimized) | |
3390 // - deallocate the "unpack_frame" | |
3391 // - deallocate the deoptimization frame | |
3392 // - in a loop using the information returned in the previous step | |
3393 // push interpreter frames; | |
3394 // - create a dummy "unpack_frame" | |
3395 // - call the C routine: Deoptimization::unpack_frames (this function | |
3396 // lays out values on the interpreter frame which was just created) | |
3397 // - deallocate the dummy unpack_frame | |
3398 // - return to the interpreter entry point | |
3399 // | |
3400 // Refer to the following methods for more information: | |
3401 // - Deoptimization::uncommon_trap | |
3402 // - Deoptimization::unpack_frame | |
3403 | |
3404 // the unloaded class index is in O0 (first parameter to this blob) | |
3405 | |
3406 // push a dummy "unpack_frame" | |
3407 // and call Deoptimization::uncommon_trap to pack the compiled frame into | |
3408 // vframe array and return the UnrollBlock information | |
3409 __ save_frame(0); | |
3410 __ set_last_Java_frame(SP, noreg); | |
3411 __ mov(I0, O2klass_index); | |
3412 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap), G2_thread, O2klass_index); | |
3413 __ reset_last_Java_frame(); | |
3414 __ mov(O0, O2UnrollBlock->after_save()); | |
3415 __ restore(); | |
3416 | |
3417 // deallocate the deoptimized frame taking care to preserve the return values | |
3418 __ mov(O2UnrollBlock, O2UnrollBlock->after_save()); | |
3419 __ restore(); | |
3420 | |
3421 // Allocate new interpreter frame(s) and possible c2i adapter frame | |
3422 | |
3423 make_new_frames(masm, false); | |
3424 | |
3425 // push a dummy "unpack_frame" taking care of float return values and | |
3426 // call Deoptimization::unpack_frames to have the unpacker layout | |
3427 // information in the interpreter frames just created and then return | |
3428 // to the interpreter entry point | |
3429 __ save_frame(0); | |
3430 __ set_last_Java_frame(SP, noreg); | |
3431 __ mov(Deoptimization::Unpack_uncommon_trap, O3); // indicate it is the uncommon trap case | |
3432 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames), G2_thread, O3); | |
3433 __ reset_last_Java_frame(); | |
3434 __ ret(); | |
3435 __ delayed()->restore(); | |
3436 | |
3437 masm->flush(); | |
3438 _uncommon_trap_blob = UncommonTrapBlob::create(&buffer, NULL, __ total_frame_size_in_bytes(0)/wordSize); | |
3439 } | |
3440 | |
3441 #endif // COMPILER2 | |
3442 | |
3443 //------------------------------generate_handler_blob------------------- | |
3444 // | |
3445 // Generate a special Compile2Runtime blob that saves all registers, and sets | |
3446 // up an OopMap. | |
3447 // | |
3448 // This blob is jumped to (via a breakpoint and the signal handler) from a | |
3449 // safepoint in compiled code. On entry to this blob, O7 contains the | |
3450 // address in the original nmethod at which we should resume normal execution. | |
3451 // Thus, this blob looks like a subroutine which must preserve lots of | |
3452 // registers and return normally. Note that O7 is never register-allocated, | |
3453 // so it is guaranteed to be free here. | |
3454 // | |
3455 | |
3456 // The hardest part of what this blob must do is to save the 64-bit %o | |
3457 // registers in the 32-bit build. A simple 'save' turn the %o's to %i's and | |
3458 // an interrupt will chop off their heads. Making space in the caller's frame | |
3459 // first will let us save the 64-bit %o's before save'ing, but we cannot hand | |
3460 // the adjusted FP off to the GC stack-crawler: this will modify the caller's | |
3461 // SP and mess up HIS OopMaps. So we first adjust the caller's SP, then save | |
3462 // the 64-bit %o's, then do a save, then fixup the caller's SP (our FP). | |
3463 // Tricky, tricky, tricky... | |
3464 | |
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3465 SafepointBlob* SharedRuntime::generate_handler_blob(address call_ptr, bool cause_return) { |
0 | 3466 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); |
3467 | |
3468 // allocate space for the code | |
3469 ResourceMark rm; | |
3470 // setup code generation tools | |
3471 // Measured 8/7/03 at 896 in 32bit debug build (no VerifyThread) | |
3472 // Measured 8/7/03 at 1080 in 32bit debug build (VerifyThread) | |
3473 // even larger with TraceJumps | |
3474 int pad = TraceJumps ? 512 : 0; | |
3475 CodeBuffer buffer("handler_blob", 1600 + pad, 512); | |
3476 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3477 int frame_size_words; | |
3478 OopMapSet *oop_maps = new OopMapSet(); | |
3479 OopMap* map = NULL; | |
3480 | |
3481 int start = __ offset(); | |
3482 | |
3483 // If this causes a return before the processing, then do a "restore" | |
3484 if (cause_return) { | |
3485 __ restore(); | |
3486 } else { | |
3487 // Make it look like we were called via the poll | |
3488 // so that frame constructor always sees a valid return address | |
3489 __ ld_ptr(G2_thread, in_bytes(JavaThread::saved_exception_pc_offset()), O7); | |
3490 __ sub(O7, frame::pc_return_offset, O7); | |
3491 } | |
3492 | |
3493 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
3494 | |
3495 // setup last_Java_sp (blows G4) | |
3496 __ set_last_Java_frame(SP, noreg); | |
3497 | |
3498 // call into the runtime to handle illegal instructions exception | |
3499 // Do not use call_VM_leaf, because we need to make a GC map at this call site. | |
3500 __ mov(G2_thread, O0); | |
3501 __ save_thread(L7_thread_cache); | |
3502 __ call(call_ptr); | |
3503 __ delayed()->nop(); | |
3504 | |
3505 // Set an oopmap for the call site. | |
3506 // We need this not only for callee-saved registers, but also for volatile | |
3507 // registers that the compiler might be keeping live across a safepoint. | |
3508 | |
3509 oop_maps->add_gc_map( __ offset() - start, map); | |
3510 | |
3511 __ restore_thread(L7_thread_cache); | |
3512 // clear last_Java_sp | |
3513 __ reset_last_Java_frame(); | |
3514 | |
3515 // Check for exceptions | |
3516 Label pending; | |
3517 | |
3518 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), O1); | |
3839 | 3519 __ br_notnull_short(O1, Assembler::pn, pending); |
0 | 3520 |
3521 RegisterSaver::restore_live_registers(masm); | |
3522 | |
3523 // We are back the the original state on entry and ready to go. | |
3524 | |
3525 __ retl(); | |
3526 __ delayed()->nop(); | |
3527 | |
3528 // Pending exception after the safepoint | |
3529 | |
3530 __ bind(pending); | |
3531 | |
3532 RegisterSaver::restore_live_registers(masm); | |
3533 | |
3534 // We are back the the original state on entry. | |
3535 | |
3536 // Tail-call forward_exception_entry, with the issuing PC in O7, | |
3537 // so it looks like the original nmethod called forward_exception_entry. | |
3538 __ set((intptr_t)StubRoutines::forward_exception_entry(), O0); | |
3539 __ JMP(O0, 0); | |
3540 __ delayed()->nop(); | |
3541 | |
3542 // ------------- | |
3543 // make sure all code is generated | |
3544 masm->flush(); | |
3545 | |
3546 // return exception blob | |
3547 return SafepointBlob::create(&buffer, oop_maps, frame_size_words); | |
3548 } | |
3549 | |
3550 // | |
3551 // generate_resolve_blob - call resolution (static/virtual/opt-virtual/ic-miss | |
3552 // | |
3553 // Generate a stub that calls into vm to find out the proper destination | |
3554 // of a java call. All the argument registers are live at this point | |
3555 // but since this is generic code we don't know what they are and the caller | |
3556 // must do any gc of the args. | |
3557 // | |
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3558 RuntimeStub* SharedRuntime::generate_resolve_blob(address destination, const char* name) { |
0 | 3559 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); |
3560 | |
3561 // allocate space for the code | |
3562 ResourceMark rm; | |
3563 // setup code generation tools | |
3564 // Measured 8/7/03 at 896 in 32bit debug build (no VerifyThread) | |
3565 // Measured 8/7/03 at 1080 in 32bit debug build (VerifyThread) | |
3566 // even larger with TraceJumps | |
3567 int pad = TraceJumps ? 512 : 0; | |
3568 CodeBuffer buffer(name, 1600 + pad, 512); | |
3569 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3570 int frame_size_words; | |
3571 OopMapSet *oop_maps = new OopMapSet(); | |
3572 OopMap* map = NULL; | |
3573 | |
3574 int start = __ offset(); | |
3575 | |
3576 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
3577 | |
3578 int frame_complete = __ offset(); | |
3579 | |
3580 // setup last_Java_sp (blows G4) | |
3581 __ set_last_Java_frame(SP, noreg); | |
3582 | |
3583 // call into the runtime to handle illegal instructions exception | |
3584 // Do not use call_VM_leaf, because we need to make a GC map at this call site. | |
3585 __ mov(G2_thread, O0); | |
3586 __ save_thread(L7_thread_cache); | |
3587 __ call(destination, relocInfo::runtime_call_type); | |
3588 __ delayed()->nop(); | |
3589 | |
3590 // O0 contains the address we are going to jump to assuming no exception got installed | |
3591 | |
3592 // Set an oopmap for the call site. | |
3593 // We need this not only for callee-saved registers, but also for volatile | |
3594 // registers that the compiler might be keeping live across a safepoint. | |
3595 | |
3596 oop_maps->add_gc_map( __ offset() - start, map); | |
3597 | |
3598 __ restore_thread(L7_thread_cache); | |
3599 // clear last_Java_sp | |
3600 __ reset_last_Java_frame(); | |
3601 | |
3602 // Check for exceptions | |
3603 Label pending; | |
3604 | |
3605 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), O1); | |
3839 | 3606 __ br_notnull_short(O1, Assembler::pn, pending); |
0 | 3607 |
3608 // get the returned methodOop | |
3609 | |
3610 __ get_vm_result(G5_method); | |
3611 __ stx(G5_method, SP, RegisterSaver::G5_offset()+STACK_BIAS); | |
3612 | |
3613 // O0 is where we want to jump, overwrite G3 which is saved and scratch | |
3614 | |
3615 __ stx(O0, SP, RegisterSaver::G3_offset()+STACK_BIAS); | |
3616 | |
3617 RegisterSaver::restore_live_registers(masm); | |
3618 | |
3619 // We are back the the original state on entry and ready to go. | |
3620 | |
3621 __ JMP(G3, 0); | |
3622 __ delayed()->nop(); | |
3623 | |
3624 // Pending exception after the safepoint | |
3625 | |
3626 __ bind(pending); | |
3627 | |
3628 RegisterSaver::restore_live_registers(masm); | |
3629 | |
3630 // We are back the the original state on entry. | |
3631 | |
3632 // Tail-call forward_exception_entry, with the issuing PC in O7, | |
3633 // so it looks like the original nmethod called forward_exception_entry. | |
3634 __ set((intptr_t)StubRoutines::forward_exception_entry(), O0); | |
3635 __ JMP(O0, 0); | |
3636 __ delayed()->nop(); | |
3637 | |
3638 // ------------- | |
3639 // make sure all code is generated | |
3640 masm->flush(); | |
3641 | |
3642 // return the blob | |
3643 // frame_size_words or bytes?? | |
3644 return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_words, oop_maps, true); | |
3645 } |