Mercurial > hg > truffle
annotate src/cpu/sparc/vm/sharedRuntime_sparc.cpp @ 1251:576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
Summary: Clear the total count when a receiver information is cleared.
Reviewed-by: never, jrose
| author | kvn |
|---|---|
| date | Sun, 07 Feb 2010 12:15:06 -0800 |
| parents | cf0685d550f1 |
| children | 2338d41fbd81 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright 2003-2010 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_sharedRuntime_sparc.cpp.incl" | |
| 27 | |
| 28 #define __ masm-> | |
| 29 | |
| 30 #ifdef COMPILER2 | |
| 31 UncommonTrapBlob* SharedRuntime::_uncommon_trap_blob; | |
| 32 #endif // COMPILER2 | |
| 33 | |
| 34 DeoptimizationBlob* SharedRuntime::_deopt_blob; | |
| 35 SafepointBlob* SharedRuntime::_polling_page_safepoint_handler_blob; | |
| 36 SafepointBlob* SharedRuntime::_polling_page_return_handler_blob; | |
| 37 RuntimeStub* SharedRuntime::_wrong_method_blob; | |
| 38 RuntimeStub* SharedRuntime::_ic_miss_blob; | |
| 39 RuntimeStub* SharedRuntime::_resolve_opt_virtual_call_blob; | |
| 40 RuntimeStub* SharedRuntime::_resolve_virtual_call_blob; | |
| 41 RuntimeStub* SharedRuntime::_resolve_static_call_blob; | |
| 42 | |
| 43 class RegisterSaver { | |
| 44 | |
| 45 // Used for saving volatile registers. This is Gregs, Fregs, I/L/O. | |
| 46 // The Oregs are problematic. In the 32bit build the compiler can | |
| 47 // have O registers live with 64 bit quantities. A window save will | |
| 48 // cut the heads off of the registers. We have to do a very extensive | |
| 49 // stack dance to save and restore these properly. | |
| 50 | |
| 51 // Note that the Oregs problem only exists if we block at either a polling | |
| 52 // page exception a compiled code safepoint that was not originally a call | |
| 53 // or deoptimize following one of these kinds of safepoints. | |
| 54 | |
| 55 // Lots of registers to save. For all builds, a window save will preserve | |
| 56 // the %i and %l registers. For the 32-bit longs-in-two entries and 64-bit | |
| 57 // builds a window-save will preserve the %o registers. In the LION build | |
| 58 // we need to save the 64-bit %o registers which requires we save them | |
| 59 // before the window-save (as then they become %i registers and get their | |
| 60 // heads chopped off on interrupt). We have to save some %g registers here | |
| 61 // as well. | |
| 62 enum { | |
| 63 // This frame's save area. Includes extra space for the native call: | |
| 64 // vararg's layout space and the like. Briefly holds the caller's | |
| 65 // register save area. | |
| 66 call_args_area = frame::register_save_words_sp_offset + | |
| 67 frame::memory_parameter_word_sp_offset*wordSize, | |
| 68 // Make sure save locations are always 8 byte aligned. | |
| 69 // can't use round_to because it doesn't produce compile time constant | |
| 70 start_of_extra_save_area = ((call_args_area + 7) & ~7), | |
| 71 g1_offset = start_of_extra_save_area, // g-regs needing saving | |
| 72 g3_offset = g1_offset+8, | |
| 73 g4_offset = g3_offset+8, | |
| 74 g5_offset = g4_offset+8, | |
| 75 o0_offset = g5_offset+8, | |
| 76 o1_offset = o0_offset+8, | |
| 77 o2_offset = o1_offset+8, | |
| 78 o3_offset = o2_offset+8, | |
| 79 o4_offset = o3_offset+8, | |
| 80 o5_offset = o4_offset+8, | |
| 81 start_of_flags_save_area = o5_offset+8, | |
| 82 ccr_offset = start_of_flags_save_area, | |
| 83 fsr_offset = ccr_offset + 8, | |
| 84 d00_offset = fsr_offset+8, // Start of float save area | |
| 85 register_save_size = d00_offset+8*32 | |
| 86 }; | |
| 87 | |
| 88 | |
| 89 public: | |
| 90 | |
| 91 static int Oexception_offset() { return o0_offset; }; | |
| 92 static int G3_offset() { return g3_offset; }; | |
| 93 static int G5_offset() { return g5_offset; }; | |
| 94 static OopMap* save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words); | |
| 95 static void restore_live_registers(MacroAssembler* masm); | |
| 96 | |
| 97 // During deoptimization only the result register need to be restored | |
| 98 // all the other values have already been extracted. | |
| 99 | |
| 100 static void restore_result_registers(MacroAssembler* masm); | |
| 101 }; | |
| 102 | |
| 103 OopMap* RegisterSaver::save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words) { | |
| 104 // Record volatile registers as callee-save values in an OopMap so their save locations will be | |
| 105 // propagated to the caller frame's RegisterMap during StackFrameStream construction (needed for | |
| 106 // deoptimization; see compiledVFrame::create_stack_value). The caller's I, L and O registers | |
| 107 // are saved in register windows - I's and L's in the caller's frame and O's in the stub frame | |
| 108 // (as the stub's I's) when the runtime routine called by the stub creates its frame. | |
| 109 int i; | |
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110 // Always make the frame size 16 byte aligned. |
| 0 | 111 int frame_size = round_to(additional_frame_words + register_save_size, 16); |
| 112 // OopMap frame size is in c2 stack slots (sizeof(jint)) not bytes or words | |
| 113 int frame_size_in_slots = frame_size / sizeof(jint); | |
| 114 // CodeBlob frame size is in words. | |
| 115 *total_frame_words = frame_size / wordSize; | |
| 116 // OopMap* map = new OopMap(*total_frame_words, 0); | |
| 117 OopMap* map = new OopMap(frame_size_in_slots, 0); | |
| 118 | |
| 119 #if !defined(_LP64) | |
| 120 | |
| 121 // Save 64-bit O registers; they will get their heads chopped off on a 'save'. | |
| 122 __ stx(O0, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8); | |
| 123 __ stx(O1, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8); | |
| 124 __ stx(O2, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+2*8); | |
| 125 __ stx(O3, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+3*8); | |
| 126 __ stx(O4, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+4*8); | |
| 127 __ stx(O5, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+5*8); | |
| 128 #endif /* _LP64 */ | |
| 129 | |
| 130 __ save(SP, -frame_size, SP); | |
| 131 | |
| 132 #ifndef _LP64 | |
| 133 // Reload the 64 bit Oregs. Although they are now Iregs we load them | |
| 134 // to Oregs here to avoid interrupts cutting off their heads | |
| 135 | |
| 136 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8, O0); | |
| 137 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8, O1); | |
| 138 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+2*8, O2); | |
| 139 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+3*8, O3); | |
| 140 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+4*8, O4); | |
| 141 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+5*8, O5); | |
| 142 | |
| 143 __ stx(O0, SP, o0_offset+STACK_BIAS); | |
| 144 map->set_callee_saved(VMRegImpl::stack2reg((o0_offset + 4)>>2), O0->as_VMReg()); | |
| 145 | |
| 146 __ stx(O1, SP, o1_offset+STACK_BIAS); | |
| 147 | |
| 148 map->set_callee_saved(VMRegImpl::stack2reg((o1_offset + 4)>>2), O1->as_VMReg()); | |
| 149 | |
| 150 __ stx(O2, SP, o2_offset+STACK_BIAS); | |
| 151 map->set_callee_saved(VMRegImpl::stack2reg((o2_offset + 4)>>2), O2->as_VMReg()); | |
| 152 | |
| 153 __ stx(O3, SP, o3_offset+STACK_BIAS); | |
| 154 map->set_callee_saved(VMRegImpl::stack2reg((o3_offset + 4)>>2), O3->as_VMReg()); | |
| 155 | |
| 156 __ stx(O4, SP, o4_offset+STACK_BIAS); | |
| 157 map->set_callee_saved(VMRegImpl::stack2reg((o4_offset + 4)>>2), O4->as_VMReg()); | |
| 158 | |
| 159 __ stx(O5, SP, o5_offset+STACK_BIAS); | |
| 160 map->set_callee_saved(VMRegImpl::stack2reg((o5_offset + 4)>>2), O5->as_VMReg()); | |
| 161 #endif /* _LP64 */ | |
| 162 | |
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163 |
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164 #ifdef _LP64 |
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165 int debug_offset = 0; |
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166 #else |
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167 int debug_offset = 4; |
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168 #endif |
| 0 | 169 // Save the G's |
| 170 __ stx(G1, SP, g1_offset+STACK_BIAS); | |
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171 map->set_callee_saved(VMRegImpl::stack2reg((g1_offset + debug_offset)>>2), G1->as_VMReg()); |
| 0 | 172 |
| 173 __ stx(G3, SP, g3_offset+STACK_BIAS); | |
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174 map->set_callee_saved(VMRegImpl::stack2reg((g3_offset + debug_offset)>>2), G3->as_VMReg()); |
| 0 | 175 |
| 176 __ stx(G4, SP, g4_offset+STACK_BIAS); | |
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177 map->set_callee_saved(VMRegImpl::stack2reg((g4_offset + debug_offset)>>2), G4->as_VMReg()); |
| 0 | 178 |
| 179 __ stx(G5, SP, g5_offset+STACK_BIAS); | |
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180 map->set_callee_saved(VMRegImpl::stack2reg((g5_offset + debug_offset)>>2), G5->as_VMReg()); |
| 0 | 181 |
| 182 // This is really a waste but we'll keep things as they were for now | |
| 183 if (true) { | |
| 184 #ifndef _LP64 | |
| 185 map->set_callee_saved(VMRegImpl::stack2reg((o0_offset)>>2), O0->as_VMReg()->next()); | |
| 186 map->set_callee_saved(VMRegImpl::stack2reg((o1_offset)>>2), O1->as_VMReg()->next()); | |
| 187 map->set_callee_saved(VMRegImpl::stack2reg((o2_offset)>>2), O2->as_VMReg()->next()); | |
| 188 map->set_callee_saved(VMRegImpl::stack2reg((o3_offset)>>2), O3->as_VMReg()->next()); | |
| 189 map->set_callee_saved(VMRegImpl::stack2reg((o4_offset)>>2), O4->as_VMReg()->next()); | |
| 190 map->set_callee_saved(VMRegImpl::stack2reg((o5_offset)>>2), O5->as_VMReg()->next()); | |
| 191 map->set_callee_saved(VMRegImpl::stack2reg((g1_offset)>>2), G1->as_VMReg()->next()); | |
| 192 map->set_callee_saved(VMRegImpl::stack2reg((g3_offset)>>2), G3->as_VMReg()->next()); | |
| 193 map->set_callee_saved(VMRegImpl::stack2reg((g4_offset)>>2), G4->as_VMReg()->next()); | |
| 194 map->set_callee_saved(VMRegImpl::stack2reg((g5_offset)>>2), G5->as_VMReg()->next()); | |
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195 #endif /* _LP64 */ |
| 0 | 196 } |
| 197 | |
| 198 | |
| 199 // Save the flags | |
| 200 __ rdccr( G5 ); | |
| 201 __ stx(G5, SP, ccr_offset+STACK_BIAS); | |
| 202 __ stxfsr(SP, fsr_offset+STACK_BIAS); | |
| 203 | |
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204 // Save all the FP registers: 32 doubles (32 floats correspond to the 2 halves of the first 16 doubles) |
| 0 | 205 int offset = d00_offset; |
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206 for( int i=0; i<FloatRegisterImpl::number_of_registers; i+=2 ) { |
| 0 | 207 FloatRegister f = as_FloatRegister(i); |
| 208 __ stf(FloatRegisterImpl::D, f, SP, offset+STACK_BIAS); | |
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209 // Record as callee saved both halves of double registers (2 float registers). |
| 0 | 210 map->set_callee_saved(VMRegImpl::stack2reg(offset>>2), f->as_VMReg()); |
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211 map->set_callee_saved(VMRegImpl::stack2reg((offset + sizeof(float))>>2), f->as_VMReg()->next()); |
| 0 | 212 offset += sizeof(double); |
| 213 } | |
| 214 | |
| 215 // And we're done. | |
| 216 | |
| 217 return map; | |
| 218 } | |
| 219 | |
| 220 | |
| 221 // Pop the current frame and restore all the registers that we | |
| 222 // saved. | |
| 223 void RegisterSaver::restore_live_registers(MacroAssembler* masm) { | |
| 224 | |
| 225 // Restore all the FP registers | |
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226 for( int i=0; i<FloatRegisterImpl::number_of_registers; i+=2 ) { |
| 0 | 227 __ ldf(FloatRegisterImpl::D, SP, d00_offset+i*sizeof(float)+STACK_BIAS, as_FloatRegister(i)); |
| 228 } | |
| 229 | |
| 230 __ ldx(SP, ccr_offset+STACK_BIAS, G1); | |
| 231 __ wrccr (G1) ; | |
| 232 | |
| 233 // Restore the G's | |
| 234 // Note that G2 (AKA GThread) must be saved and restored separately. | |
| 235 // TODO-FIXME: save and restore some of the other ASRs, viz., %asi and %gsr. | |
| 236 | |
| 237 __ ldx(SP, g1_offset+STACK_BIAS, G1); | |
| 238 __ ldx(SP, g3_offset+STACK_BIAS, G3); | |
| 239 __ ldx(SP, g4_offset+STACK_BIAS, G4); | |
| 240 __ ldx(SP, g5_offset+STACK_BIAS, G5); | |
| 241 | |
| 242 | |
| 243 #if !defined(_LP64) | |
| 244 // Restore the 64-bit O's. | |
| 245 __ ldx(SP, o0_offset+STACK_BIAS, O0); | |
| 246 __ ldx(SP, o1_offset+STACK_BIAS, O1); | |
| 247 __ ldx(SP, o2_offset+STACK_BIAS, O2); | |
| 248 __ ldx(SP, o3_offset+STACK_BIAS, O3); | |
| 249 __ ldx(SP, o4_offset+STACK_BIAS, O4); | |
| 250 __ ldx(SP, o5_offset+STACK_BIAS, O5); | |
| 251 | |
| 252 // And temporarily place them in TLS | |
| 253 | |
| 254 __ stx(O0, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8); | |
| 255 __ stx(O1, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8); | |
| 256 __ stx(O2, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+2*8); | |
| 257 __ stx(O3, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+3*8); | |
| 258 __ stx(O4, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+4*8); | |
| 259 __ stx(O5, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+5*8); | |
| 260 #endif /* _LP64 */ | |
| 261 | |
| 262 // Restore flags | |
| 263 | |
| 264 __ ldxfsr(SP, fsr_offset+STACK_BIAS); | |
| 265 | |
| 266 __ restore(); | |
| 267 | |
| 268 #if !defined(_LP64) | |
| 269 // Now reload the 64bit Oregs after we've restore the window. | |
| 270 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8, O0); | |
| 271 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8, O1); | |
| 272 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+2*8, O2); | |
| 273 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+3*8, O3); | |
| 274 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+4*8, O4); | |
| 275 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+5*8, O5); | |
| 276 #endif /* _LP64 */ | |
| 277 | |
| 278 } | |
| 279 | |
| 280 // Pop the current frame and restore the registers that might be holding | |
| 281 // a result. | |
| 282 void RegisterSaver::restore_result_registers(MacroAssembler* masm) { | |
| 283 | |
| 284 #if !defined(_LP64) | |
| 285 // 32bit build returns longs in G1 | |
| 286 __ ldx(SP, g1_offset+STACK_BIAS, G1); | |
| 287 | |
| 288 // Retrieve the 64-bit O's. | |
| 289 __ ldx(SP, o0_offset+STACK_BIAS, O0); | |
| 290 __ ldx(SP, o1_offset+STACK_BIAS, O1); | |
| 291 // and save to TLS | |
| 292 __ stx(O0, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8); | |
| 293 __ stx(O1, G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8); | |
| 294 #endif /* _LP64 */ | |
| 295 | |
| 296 __ ldf(FloatRegisterImpl::D, SP, d00_offset+STACK_BIAS, as_FloatRegister(0)); | |
| 297 | |
| 298 __ restore(); | |
| 299 | |
| 300 #if !defined(_LP64) | |
| 301 // Now reload the 64bit Oregs after we've restore the window. | |
| 302 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+0*8, O0); | |
| 303 __ ldx(G2_thread, JavaThread::o_reg_temps_offset_in_bytes()+1*8, O1); | |
| 304 #endif /* _LP64 */ | |
| 305 | |
| 306 } | |
| 307 | |
| 308 // The java_calling_convention describes stack locations as ideal slots on | |
| 309 // a frame with no abi restrictions. Since we must observe abi restrictions | |
| 310 // (like the placement of the register window) the slots must be biased by | |
| 311 // the following value. | |
| 312 static int reg2offset(VMReg r) { | |
| 313 return (r->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size; | |
| 314 } | |
| 315 | |
| 316 // --------------------------------------------------------------------------- | |
| 317 // Read the array of BasicTypes from a signature, and compute where the | |
| 318 // arguments should go. Values in the VMRegPair regs array refer to 4-byte (VMRegImpl::stack_slot_size) | |
| 319 // quantities. Values less than VMRegImpl::stack0 are registers, those above | |
| 320 // refer to 4-byte stack slots. All stack slots are based off of the window | |
| 321 // top. VMRegImpl::stack0 refers to the first slot past the 16-word window, | |
| 322 // and VMRegImpl::stack0+1 refers to the memory word 4-byes higher. Register | |
| 323 // values 0-63 (up to RegisterImpl::number_of_registers) are the 64-bit | |
| 324 // integer registers. Values 64-95 are the (32-bit only) float registers. | |
| 325 // Each 32-bit quantity is given its own number, so the integer registers | |
| 326 // (in either 32- or 64-bit builds) use 2 numbers. For example, there is | |
| 327 // an O0-low and an O0-high. Essentially, all int register numbers are doubled. | |
| 328 | |
| 329 // Register results are passed in O0-O5, for outgoing call arguments. To | |
| 330 // convert to incoming arguments, convert all O's to I's. The regs array | |
| 331 // refer to the low and hi 32-bit words of 64-bit registers or stack slots. | |
| 332 // If the regs[].second() field is set to VMRegImpl::Bad(), it means it's unused (a | |
| 333 // 32-bit value was passed). If both are VMRegImpl::Bad(), it means no value was | |
| 334 // passed (used as a placeholder for the other half of longs and doubles in | |
| 335 // the 64-bit build). regs[].second() is either VMRegImpl::Bad() or regs[].second() is | |
| 336 // regs[].first()+1 (regs[].first() may be misaligned in the C calling convention). | |
| 337 // Sparc never passes a value in regs[].second() but not regs[].first() (regs[].first() | |
| 338 // == VMRegImpl::Bad() && regs[].second() != VMRegImpl::Bad()) nor unrelated values in the | |
| 339 // same VMRegPair. | |
| 340 | |
| 341 // Note: the INPUTS in sig_bt are in units of Java argument words, which are | |
| 342 // either 32-bit or 64-bit depending on the build. The OUTPUTS are in 32-bit | |
| 343 // units regardless of build. | |
| 344 | |
| 345 | |
| 346 // --------------------------------------------------------------------------- | |
| 347 // The compiled Java calling convention. The Java convention always passes | |
| 348 // 64-bit values in adjacent aligned locations (either registers or stack), | |
| 349 // floats in float registers and doubles in aligned float pairs. Values are | |
| 350 // packed in the registers. There is no backing varargs store for values in | |
| 351 // registers. In the 32-bit build, longs are passed in G1 and G4 (cannot be | |
| 352 // passed in I's, because longs in I's get their heads chopped off at | |
| 353 // interrupt). | |
| 354 int SharedRuntime::java_calling_convention(const BasicType *sig_bt, | |
| 355 VMRegPair *regs, | |
| 356 int total_args_passed, | |
| 357 int is_outgoing) { | |
| 358 assert(F31->as_VMReg()->is_reg(), "overlapping stack/register numbers"); | |
| 359 | |
| 360 // Convention is to pack the first 6 int/oop args into the first 6 registers | |
| 361 // (I0-I5), extras spill to the stack. Then pack the first 8 float args | |
| 362 // into F0-F7, extras spill to the stack. Then pad all register sets to | |
| 363 // align. Then put longs and doubles into the same registers as they fit, | |
| 364 // else spill to the stack. | |
| 365 const int int_reg_max = SPARC_ARGS_IN_REGS_NUM; | |
| 366 const int flt_reg_max = 8; | |
| 367 // | |
| 368 // Where 32-bit 1-reg longs start being passed | |
| 369 // In tiered we must pass on stack because c1 can't use a "pair" in a single reg. | |
| 370 // So make it look like we've filled all the G regs that c2 wants to use. | |
| 371 Register g_reg = TieredCompilation ? noreg : G1; | |
| 372 | |
| 373 // Count int/oop and float args. See how many stack slots we'll need and | |
| 374 // where the longs & doubles will go. | |
| 375 int int_reg_cnt = 0; | |
| 376 int flt_reg_cnt = 0; | |
| 377 // int stk_reg_pairs = frame::register_save_words*(wordSize>>2); | |
| 378 // int stk_reg_pairs = SharedRuntime::out_preserve_stack_slots(); | |
| 379 int stk_reg_pairs = 0; | |
| 380 for (int i = 0; i < total_args_passed; i++) { | |
| 381 switch (sig_bt[i]) { | |
| 382 case T_LONG: // LP64, longs compete with int args | |
| 383 assert(sig_bt[i+1] == T_VOID, ""); | |
| 384 #ifdef _LP64 | |
| 385 if (int_reg_cnt < int_reg_max) int_reg_cnt++; | |
| 386 #endif | |
| 387 break; | |
| 388 case T_OBJECT: | |
| 389 case T_ARRAY: | |
| 390 case T_ADDRESS: // Used, e.g., in slow-path locking for the lock's stack address | |
| 391 if (int_reg_cnt < int_reg_max) int_reg_cnt++; | |
| 392 #ifndef _LP64 | |
| 393 else stk_reg_pairs++; | |
| 394 #endif | |
| 395 break; | |
| 396 case T_INT: | |
| 397 case T_SHORT: | |
| 398 case T_CHAR: | |
| 399 case T_BYTE: | |
| 400 case T_BOOLEAN: | |
| 401 if (int_reg_cnt < int_reg_max) int_reg_cnt++; | |
| 402 else stk_reg_pairs++; | |
| 403 break; | |
| 404 case T_FLOAT: | |
| 405 if (flt_reg_cnt < flt_reg_max) flt_reg_cnt++; | |
| 406 else stk_reg_pairs++; | |
| 407 break; | |
| 408 case T_DOUBLE: | |
| 409 assert(sig_bt[i+1] == T_VOID, ""); | |
| 410 break; | |
| 411 case T_VOID: | |
| 412 break; | |
| 413 default: | |
| 414 ShouldNotReachHere(); | |
| 415 } | |
| 416 } | |
| 417 | |
| 418 // This is where the longs/doubles start on the stack. | |
| 419 stk_reg_pairs = (stk_reg_pairs+1) & ~1; // Round | |
| 420 | |
| 421 int int_reg_pairs = (int_reg_cnt+1) & ~1; // 32-bit 2-reg longs only | |
| 422 int flt_reg_pairs = (flt_reg_cnt+1) & ~1; | |
| 423 | |
| 424 // int stk_reg = frame::register_save_words*(wordSize>>2); | |
| 425 // int stk_reg = SharedRuntime::out_preserve_stack_slots(); | |
| 426 int stk_reg = 0; | |
| 427 int int_reg = 0; | |
| 428 int flt_reg = 0; | |
| 429 | |
| 430 // Now do the signature layout | |
| 431 for (int i = 0; i < total_args_passed; i++) { | |
| 432 switch (sig_bt[i]) { | |
| 433 case T_INT: | |
| 434 case T_SHORT: | |
| 435 case T_CHAR: | |
| 436 case T_BYTE: | |
| 437 case T_BOOLEAN: | |
| 438 #ifndef _LP64 | |
| 439 case T_OBJECT: | |
| 440 case T_ARRAY: | |
| 441 case T_ADDRESS: // Used, e.g., in slow-path locking for the lock's stack address | |
| 442 #endif // _LP64 | |
| 443 if (int_reg < int_reg_max) { | |
| 444 Register r = is_outgoing ? as_oRegister(int_reg++) : as_iRegister(int_reg++); | |
| 445 regs[i].set1(r->as_VMReg()); | |
| 446 } else { | |
| 447 regs[i].set1(VMRegImpl::stack2reg(stk_reg++)); | |
| 448 } | |
| 449 break; | |
| 450 | |
| 451 #ifdef _LP64 | |
| 452 case T_OBJECT: | |
| 453 case T_ARRAY: | |
| 454 case T_ADDRESS: // Used, e.g., in slow-path locking for the lock's stack address | |
| 455 if (int_reg < int_reg_max) { | |
| 456 Register r = is_outgoing ? as_oRegister(int_reg++) : as_iRegister(int_reg++); | |
| 457 regs[i].set2(r->as_VMReg()); | |
| 458 } else { | |
| 459 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
| 460 stk_reg_pairs += 2; | |
| 461 } | |
| 462 break; | |
| 463 #endif // _LP64 | |
| 464 | |
| 465 case T_LONG: | |
| 466 assert(sig_bt[i+1] == T_VOID, "expecting VOID in other half"); | |
| 467 #ifdef _LP64 | |
| 468 if (int_reg < int_reg_max) { | |
| 469 Register r = is_outgoing ? as_oRegister(int_reg++) : as_iRegister(int_reg++); | |
| 470 regs[i].set2(r->as_VMReg()); | |
| 471 } else { | |
| 472 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
| 473 stk_reg_pairs += 2; | |
| 474 } | |
| 475 #else | |
| 304 | 476 #ifdef COMPILER2 |
| 0 | 477 // For 32-bit build, can't pass longs in O-regs because they become |
| 478 // I-regs and get trashed. Use G-regs instead. G1 and G4 are almost | |
| 479 // spare and available. This convention isn't used by the Sparc ABI or | |
| 480 // anywhere else. If we're tiered then we don't use G-regs because c1 | |
| 304 | 481 // can't deal with them as a "pair". (Tiered makes this code think g's are filled) |
| 0 | 482 // G0: zero |
| 483 // G1: 1st Long arg | |
| 484 // G2: global allocated to TLS | |
| 485 // G3: used in inline cache check | |
| 486 // G4: 2nd Long arg | |
| 487 // G5: used in inline cache check | |
| 488 // G6: used by OS | |
| 489 // G7: used by OS | |
| 490 | |
| 491 if (g_reg == G1) { | |
| 492 regs[i].set2(G1->as_VMReg()); // This long arg in G1 | |
| 493 g_reg = G4; // Where the next arg goes | |
| 494 } else if (g_reg == G4) { | |
| 495 regs[i].set2(G4->as_VMReg()); // The 2nd long arg in G4 | |
| 496 g_reg = noreg; // No more longs in registers | |
| 497 } else { | |
| 498 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
| 499 stk_reg_pairs += 2; | |
| 500 } | |
| 501 #else // COMPILER2 | |
| 502 if (int_reg_pairs + 1 < int_reg_max) { | |
| 503 if (is_outgoing) { | |
| 504 regs[i].set_pair(as_oRegister(int_reg_pairs + 1)->as_VMReg(), as_oRegister(int_reg_pairs)->as_VMReg()); | |
| 505 } else { | |
| 506 regs[i].set_pair(as_iRegister(int_reg_pairs + 1)->as_VMReg(), as_iRegister(int_reg_pairs)->as_VMReg()); | |
| 507 } | |
| 508 int_reg_pairs += 2; | |
| 509 } else { | |
| 510 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
| 511 stk_reg_pairs += 2; | |
| 512 } | |
| 513 #endif // COMPILER2 | |
| 304 | 514 #endif // _LP64 |
| 0 | 515 break; |
| 516 | |
| 517 case T_FLOAT: | |
| 518 if (flt_reg < flt_reg_max) regs[i].set1(as_FloatRegister(flt_reg++)->as_VMReg()); | |
| 519 else regs[i].set1( VMRegImpl::stack2reg(stk_reg++)); | |
| 520 break; | |
| 521 case T_DOUBLE: | |
| 522 assert(sig_bt[i+1] == T_VOID, "expecting half"); | |
| 523 if (flt_reg_pairs + 1 < flt_reg_max) { | |
| 524 regs[i].set2(as_FloatRegister(flt_reg_pairs)->as_VMReg()); | |
| 525 flt_reg_pairs += 2; | |
| 526 } else { | |
| 527 regs[i].set2(VMRegImpl::stack2reg(stk_reg_pairs)); | |
| 528 stk_reg_pairs += 2; | |
| 529 } | |
| 530 break; | |
| 531 case T_VOID: regs[i].set_bad(); break; // Halves of longs & doubles | |
| 532 default: | |
| 533 ShouldNotReachHere(); | |
| 534 } | |
| 535 } | |
| 536 | |
| 537 // retun the amount of stack space these arguments will need. | |
| 538 return stk_reg_pairs; | |
| 539 | |
| 540 } | |
| 541 | |
|
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542 // Helper class mostly to avoid passing masm everywhere, and handle |
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543 // store displacement overflow logic. |
| 0 | 544 class AdapterGenerator { |
| 545 MacroAssembler *masm; | |
| 546 Register Rdisp; | |
| 547 void set_Rdisp(Register r) { Rdisp = r; } | |
| 548 | |
| 549 void patch_callers_callsite(); | |
| 550 void tag_c2i_arg(frame::Tag t, Register base, int st_off, Register scratch); | |
| 551 | |
| 552 // base+st_off points to top of argument | |
| 553 int arg_offset(const int st_off) { return st_off + Interpreter::value_offset_in_bytes(); } | |
| 554 int next_arg_offset(const int st_off) { | |
| 555 return st_off - Interpreter::stackElementSize() + Interpreter::value_offset_in_bytes(); | |
| 556 } | |
| 557 | |
|
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558 int tag_offset(const int st_off) { return st_off + Interpreter::tag_offset_in_bytes(); } |
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559 int next_tag_offset(const int st_off) { |
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560 return st_off - Interpreter::stackElementSize() + Interpreter::tag_offset_in_bytes(); |
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561 } |
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562 |
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563 // Argument slot values may be loaded first into a register because |
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564 // they might not fit into displacement. |
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565 RegisterOrConstant arg_slot(const int st_off); |
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566 RegisterOrConstant next_arg_slot(const int st_off); |
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567 |
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568 RegisterOrConstant tag_slot(const int st_off); |
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569 RegisterOrConstant next_tag_slot(const int st_off); |
| 0 | 570 |
| 571 // Stores long into offset pointed to by base | |
| 572 void store_c2i_long(Register r, Register base, | |
| 573 const int st_off, bool is_stack); | |
| 574 void store_c2i_object(Register r, Register base, | |
| 575 const int st_off); | |
| 576 void store_c2i_int(Register r, Register base, | |
| 577 const int st_off); | |
| 578 void store_c2i_double(VMReg r_2, | |
| 579 VMReg r_1, Register base, const int st_off); | |
| 580 void store_c2i_float(FloatRegister f, Register base, | |
| 581 const int st_off); | |
| 582 | |
| 583 public: | |
| 584 void gen_c2i_adapter(int total_args_passed, | |
| 585 // VMReg max_arg, | |
| 586 int comp_args_on_stack, // VMRegStackSlots | |
| 587 const BasicType *sig_bt, | |
| 588 const VMRegPair *regs, | |
| 589 Label& skip_fixup); | |
| 590 void gen_i2c_adapter(int total_args_passed, | |
| 591 // VMReg max_arg, | |
| 592 int comp_args_on_stack, // VMRegStackSlots | |
| 593 const BasicType *sig_bt, | |
| 594 const VMRegPair *regs); | |
| 595 | |
| 596 AdapterGenerator(MacroAssembler *_masm) : masm(_masm) {} | |
| 597 }; | |
| 598 | |
| 599 | |
| 600 // Patch the callers callsite with entry to compiled code if it exists. | |
| 601 void AdapterGenerator::patch_callers_callsite() { | |
| 602 Label L; | |
| 603 __ ld_ptr(G5_method, in_bytes(methodOopDesc::code_offset()), G3_scratch); | |
| 604 __ br_null(G3_scratch, false, __ pt, L); | |
| 605 // Schedule the branch target address early. | |
| 606 __ delayed()->ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), G3_scratch); | |
| 607 // Call into the VM to patch the caller, then jump to compiled callee | |
| 608 __ save_frame(4); // Args in compiled layout; do not blow them | |
| 609 | |
| 610 // Must save all the live Gregs the list is: | |
| 611 // G1: 1st Long arg (32bit build) | |
| 612 // G2: global allocated to TLS | |
| 613 // G3: used in inline cache check (scratch) | |
| 614 // G4: 2nd Long arg (32bit build); | |
| 615 // G5: used in inline cache check (methodOop) | |
| 616 | |
| 617 // The longs must go to the stack by hand since in the 32 bit build they can be trashed by window ops. | |
| 618 | |
| 619 #ifdef _LP64 | |
| 620 // mov(s,d) | |
| 621 __ mov(G1, L1); | |
| 622 __ mov(G4, L4); | |
| 623 __ mov(G5_method, L5); | |
| 624 __ mov(G5_method, O0); // VM needs target method | |
| 625 __ mov(I7, O1); // VM needs caller's callsite | |
| 626 // Must be a leaf call... | |
| 627 // can be very far once the blob has been relocated | |
| 727 | 628 AddressLiteral dest(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite)); |
| 0 | 629 __ relocate(relocInfo::runtime_call_type); |
| 727 | 630 __ jumpl_to(dest, O7, O7); |
| 0 | 631 __ delayed()->mov(G2_thread, L7_thread_cache); |
| 632 __ mov(L7_thread_cache, G2_thread); | |
| 633 __ mov(L1, G1); | |
| 634 __ mov(L4, G4); | |
| 635 __ mov(L5, G5_method); | |
| 636 #else | |
| 637 __ stx(G1, FP, -8 + STACK_BIAS); | |
| 638 __ stx(G4, FP, -16 + STACK_BIAS); | |
| 639 __ mov(G5_method, L5); | |
| 640 __ mov(G5_method, O0); // VM needs target method | |
| 641 __ mov(I7, O1); // VM needs caller's callsite | |
| 642 // Must be a leaf call... | |
| 643 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite), relocInfo::runtime_call_type); | |
| 644 __ delayed()->mov(G2_thread, L7_thread_cache); | |
| 645 __ mov(L7_thread_cache, G2_thread); | |
| 646 __ ldx(FP, -8 + STACK_BIAS, G1); | |
| 647 __ ldx(FP, -16 + STACK_BIAS, G4); | |
| 648 __ mov(L5, G5_method); | |
| 649 __ ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), G3_scratch); | |
| 650 #endif /* _LP64 */ | |
| 651 | |
| 652 __ restore(); // Restore args | |
| 653 __ bind(L); | |
| 654 } | |
| 655 | |
| 656 void AdapterGenerator::tag_c2i_arg(frame::Tag t, Register base, int st_off, | |
| 657 Register scratch) { | |
| 658 if (TaggedStackInterpreter) { | |
|
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659 RegisterOrConstant slot = tag_slot(st_off); |
| 0 | 660 // have to store zero because local slots can be reused (rats!) |
| 661 if (t == frame::TagValue) { | |
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662 __ st_ptr(G0, base, slot); |
| 0 | 663 } else if (t == frame::TagCategory2) { |
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664 __ st_ptr(G0, base, slot); |
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665 __ st_ptr(G0, base, next_tag_slot(st_off)); |
| 0 | 666 } else { |
| 667 __ mov(t, scratch); | |
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668 __ st_ptr(scratch, base, slot); |
| 0 | 669 } |
| 670 } | |
| 671 } | |
| 672 | |
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673 |
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674 RegisterOrConstant AdapterGenerator::arg_slot(const int st_off) { |
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675 RegisterOrConstant roc(arg_offset(st_off)); |
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676 return __ ensure_simm13_or_reg(roc, Rdisp); |
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677 } |
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678 |
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679 RegisterOrConstant AdapterGenerator::next_arg_slot(const int st_off) { |
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680 RegisterOrConstant roc(next_arg_offset(st_off)); |
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681 return __ ensure_simm13_or_reg(roc, Rdisp); |
| 0 | 682 } |
| 683 | |
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684 |
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685 RegisterOrConstant AdapterGenerator::tag_slot(const int st_off) { |
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686 RegisterOrConstant roc(tag_offset(st_off)); |
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687 return __ ensure_simm13_or_reg(roc, Rdisp); |
| 0 | 688 } |
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689 |
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690 RegisterOrConstant AdapterGenerator::next_tag_slot(const int st_off) { |
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691 RegisterOrConstant roc(next_tag_offset(st_off)); |
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692 return __ ensure_simm13_or_reg(roc, Rdisp); |
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693 } |
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694 |
| 0 | 695 |
| 696 // Stores long into offset pointed to by base | |
| 697 void AdapterGenerator::store_c2i_long(Register r, Register base, | |
| 698 const int st_off, bool is_stack) { | |
| 699 #ifdef _LP64 | |
| 700 // In V9, longs are given 2 64-bit slots in the interpreter, but the | |
| 701 // data is passed in only 1 slot. | |
| 702 __ stx(r, base, next_arg_slot(st_off)); | |
| 703 #else | |
|
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704 #ifdef COMPILER2 |
| 0 | 705 // Misaligned store of 64-bit data |
| 706 __ stw(r, base, arg_slot(st_off)); // lo bits | |
| 707 __ srlx(r, 32, r); | |
| 708 __ stw(r, base, next_arg_slot(st_off)); // hi bits | |
| 709 #else | |
| 710 if (is_stack) { | |
| 711 // Misaligned store of 64-bit data | |
| 712 __ stw(r, base, arg_slot(st_off)); // lo bits | |
| 713 __ srlx(r, 32, r); | |
| 714 __ stw(r, base, next_arg_slot(st_off)); // hi bits | |
| 715 } else { | |
| 716 __ stw(r->successor(), base, arg_slot(st_off) ); // lo bits | |
| 717 __ stw(r , base, next_arg_slot(st_off)); // hi bits | |
| 718 } | |
| 719 #endif // COMPILER2 | |
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720 #endif // _LP64 |
| 0 | 721 tag_c2i_arg(frame::TagCategory2, base, st_off, r); |
| 722 } | |
| 723 | |
| 724 void AdapterGenerator::store_c2i_object(Register r, Register base, | |
| 725 const int st_off) { | |
| 726 __ st_ptr (r, base, arg_slot(st_off)); | |
| 727 tag_c2i_arg(frame::TagReference, base, st_off, r); | |
| 728 } | |
| 729 | |
| 730 void AdapterGenerator::store_c2i_int(Register r, Register base, | |
| 731 const int st_off) { | |
| 732 __ st (r, base, arg_slot(st_off)); | |
| 733 tag_c2i_arg(frame::TagValue, base, st_off, r); | |
| 734 } | |
| 735 | |
| 736 // Stores into offset pointed to by base | |
| 737 void AdapterGenerator::store_c2i_double(VMReg r_2, | |
| 738 VMReg r_1, Register base, const int st_off) { | |
| 739 #ifdef _LP64 | |
| 740 // In V9, doubles are given 2 64-bit slots in the interpreter, but the | |
| 741 // data is passed in only 1 slot. | |
| 742 __ stf(FloatRegisterImpl::D, r_1->as_FloatRegister(), base, next_arg_slot(st_off)); | |
| 743 #else | |
| 744 // Need to marshal 64-bit value from misaligned Lesp loads | |
| 745 __ stf(FloatRegisterImpl::S, r_1->as_FloatRegister(), base, next_arg_slot(st_off)); | |
| 746 __ stf(FloatRegisterImpl::S, r_2->as_FloatRegister(), base, arg_slot(st_off) ); | |
| 747 #endif | |
| 748 tag_c2i_arg(frame::TagCategory2, base, st_off, G1_scratch); | |
| 749 } | |
| 750 | |
| 751 void AdapterGenerator::store_c2i_float(FloatRegister f, Register base, | |
| 752 const int st_off) { | |
| 753 __ stf(FloatRegisterImpl::S, f, base, arg_slot(st_off)); | |
| 754 tag_c2i_arg(frame::TagValue, base, st_off, G1_scratch); | |
| 755 } | |
| 756 | |
| 757 void AdapterGenerator::gen_c2i_adapter( | |
| 758 int total_args_passed, | |
| 759 // VMReg max_arg, | |
| 760 int comp_args_on_stack, // VMRegStackSlots | |
| 761 const BasicType *sig_bt, | |
| 762 const VMRegPair *regs, | |
| 763 Label& skip_fixup) { | |
| 764 | |
| 765 // Before we get into the guts of the C2I adapter, see if we should be here | |
| 766 // at all. We've come from compiled code and are attempting to jump to the | |
| 767 // interpreter, which means the caller made a static call to get here | |
| 768 // (vcalls always get a compiled target if there is one). Check for a | |
| 769 // compiled target. If there is one, we need to patch the caller's call. | |
| 770 // However we will run interpreted if we come thru here. The next pass | |
| 771 // thru the call site will run compiled. If we ran compiled here then | |
| 772 // we can (theorectically) do endless i2c->c2i->i2c transitions during | |
| 773 // deopt/uncommon trap cycles. If we always go interpreted here then | |
| 774 // we can have at most one and don't need to play any tricks to keep | |
| 775 // from endlessly growing the stack. | |
| 776 // | |
| 777 // Actually if we detected that we had an i2c->c2i transition here we | |
| 778 // ought to be able to reset the world back to the state of the interpreted | |
| 779 // call and not bother building another interpreter arg area. We don't | |
| 780 // do that at this point. | |
| 781 | |
| 782 patch_callers_callsite(); | |
| 783 | |
| 784 __ bind(skip_fixup); | |
| 785 | |
| 786 // Since all args are passed on the stack, total_args_passed*wordSize is the | |
| 787 // space we need. Add in varargs area needed by the interpreter. Round up | |
| 788 // to stack alignment. | |
| 789 const int arg_size = total_args_passed * Interpreter::stackElementSize(); | |
| 790 const int varargs_area = | |
| 791 (frame::varargs_offset - frame::register_save_words)*wordSize; | |
| 792 const int extraspace = round_to(arg_size + varargs_area, 2*wordSize); | |
| 793 | |
| 794 int bias = STACK_BIAS; | |
| 795 const int interp_arg_offset = frame::varargs_offset*wordSize + | |
| 796 (total_args_passed-1)*Interpreter::stackElementSize(); | |
| 797 | |
| 798 Register base = SP; | |
| 799 | |
| 800 #ifdef _LP64 | |
| 801 // In the 64bit build because of wider slots and STACKBIAS we can run | |
| 802 // out of bits in the displacement to do loads and stores. Use g3 as | |
| 803 // temporary displacement. | |
| 804 if (! __ is_simm13(extraspace)) { | |
| 805 __ set(extraspace, G3_scratch); | |
| 806 __ sub(SP, G3_scratch, SP); | |
| 807 } else { | |
| 808 __ sub(SP, extraspace, SP); | |
| 809 } | |
| 810 set_Rdisp(G3_scratch); | |
| 811 #else | |
| 812 __ sub(SP, extraspace, SP); | |
| 813 #endif // _LP64 | |
| 814 | |
| 815 // First write G1 (if used) to where ever it must go | |
| 816 for (int i=0; i<total_args_passed; i++) { | |
| 817 const int st_off = interp_arg_offset - (i*Interpreter::stackElementSize()) + bias; | |
| 818 VMReg r_1 = regs[i].first(); | |
| 819 VMReg r_2 = regs[i].second(); | |
| 820 if (r_1 == G1_scratch->as_VMReg()) { | |
| 821 if (sig_bt[i] == T_OBJECT || sig_bt[i] == T_ARRAY) { | |
| 822 store_c2i_object(G1_scratch, base, st_off); | |
| 823 } else if (sig_bt[i] == T_LONG) { | |
| 824 assert(!TieredCompilation, "should not use register args for longs"); | |
| 825 store_c2i_long(G1_scratch, base, st_off, false); | |
| 826 } else { | |
| 827 store_c2i_int(G1_scratch, base, st_off); | |
| 828 } | |
| 829 } | |
| 830 } | |
| 831 | |
| 832 // Now write the args into the outgoing interpreter space | |
| 833 for (int i=0; i<total_args_passed; i++) { | |
| 834 const int st_off = interp_arg_offset - (i*Interpreter::stackElementSize()) + bias; | |
| 835 VMReg r_1 = regs[i].first(); | |
| 836 VMReg r_2 = regs[i].second(); | |
| 837 if (!r_1->is_valid()) { | |
| 838 assert(!r_2->is_valid(), ""); | |
| 839 continue; | |
| 840 } | |
| 841 // Skip G1 if found as we did it first in order to free it up | |
| 842 if (r_1 == G1_scratch->as_VMReg()) { | |
| 843 continue; | |
| 844 } | |
| 845 #ifdef ASSERT | |
| 846 bool G1_forced = false; | |
| 847 #endif // ASSERT | |
| 848 if (r_1->is_stack()) { // Pretend stack targets are loaded into G1 | |
| 849 #ifdef _LP64 | |
| 850 Register ld_off = Rdisp; | |
| 851 __ set(reg2offset(r_1) + extraspace + bias, ld_off); | |
| 852 #else | |
| 853 int ld_off = reg2offset(r_1) + extraspace + bias; | |
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854 #endif // _LP64 |
| 0 | 855 #ifdef ASSERT |
| 856 G1_forced = true; | |
| 857 #endif // ASSERT | |
| 858 r_1 = G1_scratch->as_VMReg();// as part of the load/store shuffle | |
| 859 if (!r_2->is_valid()) __ ld (base, ld_off, G1_scratch); | |
| 860 else __ ldx(base, ld_off, G1_scratch); | |
| 861 } | |
| 862 | |
| 863 if (r_1->is_Register()) { | |
| 864 Register r = r_1->as_Register()->after_restore(); | |
| 865 if (sig_bt[i] == T_OBJECT || sig_bt[i] == T_ARRAY) { | |
| 866 store_c2i_object(r, base, st_off); | |
| 867 } else if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
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868 #ifndef _LP64 |
| 0 | 869 if (TieredCompilation) { |
| 870 assert(G1_forced || sig_bt[i] != T_LONG, "should not use register args for longs"); | |
| 871 } | |
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872 #endif // _LP64 |
| 0 | 873 store_c2i_long(r, base, st_off, r_2->is_stack()); |
| 874 } else { | |
| 875 store_c2i_int(r, base, st_off); | |
| 876 } | |
| 877 } else { | |
| 878 assert(r_1->is_FloatRegister(), ""); | |
| 879 if (sig_bt[i] == T_FLOAT) { | |
| 880 store_c2i_float(r_1->as_FloatRegister(), base, st_off); | |
| 881 } else { | |
| 882 assert(sig_bt[i] == T_DOUBLE, "wrong type"); | |
| 883 store_c2i_double(r_2, r_1, base, st_off); | |
| 884 } | |
| 885 } | |
| 886 } | |
| 887 | |
| 888 #ifdef _LP64 | |
| 889 // Need to reload G3_scratch, used for temporary displacements. | |
| 890 __ ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), G3_scratch); | |
| 891 | |
| 892 // Pass O5_savedSP as an argument to the interpreter. | |
| 893 // The interpreter will restore SP to this value before returning. | |
| 894 __ set(extraspace, G1); | |
| 895 __ add(SP, G1, O5_savedSP); | |
| 896 #else | |
| 897 // Pass O5_savedSP as an argument to the interpreter. | |
| 898 // The interpreter will restore SP to this value before returning. | |
| 899 __ add(SP, extraspace, O5_savedSP); | |
| 900 #endif // _LP64 | |
| 901 | |
| 902 __ mov((frame::varargs_offset)*wordSize - | |
| 903 1*Interpreter::stackElementSize()+bias+BytesPerWord, G1); | |
| 904 // Jump to the interpreter just as if interpreter was doing it. | |
| 905 __ jmpl(G3_scratch, 0, G0); | |
| 906 // Setup Lesp for the call. Cannot actually set Lesp as the current Lesp | |
| 907 // (really L0) is in use by the compiled frame as a generic temp. However, | |
| 908 // the interpreter does not know where its args are without some kind of | |
| 909 // arg pointer being passed in. Pass it in Gargs. | |
| 910 __ delayed()->add(SP, G1, Gargs); | |
| 911 } | |
| 912 | |
| 913 void AdapterGenerator::gen_i2c_adapter( | |
| 914 int total_args_passed, | |
| 915 // VMReg max_arg, | |
| 916 int comp_args_on_stack, // VMRegStackSlots | |
| 917 const BasicType *sig_bt, | |
| 918 const VMRegPair *regs) { | |
| 919 | |
| 920 // Generate an I2C adapter: adjust the I-frame to make space for the C-frame | |
| 921 // layout. Lesp was saved by the calling I-frame and will be restored on | |
| 922 // return. Meanwhile, outgoing arg space is all owned by the callee | |
| 923 // C-frame, so we can mangle it at will. After adjusting the frame size, | |
| 924 // hoist register arguments and repack other args according to the compiled | |
| 925 // code convention. Finally, end in a jump to the compiled code. The entry | |
| 926 // point address is the start of the buffer. | |
| 927 | |
| 928 // We will only enter here from an interpreted frame and never from after | |
| 929 // passing thru a c2i. Azul allowed this but we do not. If we lose the | |
| 930 // race and use a c2i we will remain interpreted for the race loser(s). | |
| 931 // This removes all sorts of headaches on the x86 side and also eliminates | |
| 932 // the possibility of having c2i -> i2c -> c2i -> ... endless transitions. | |
| 933 | |
| 934 // As you can see from the list of inputs & outputs there are not a lot | |
| 935 // of temp registers to work with: mostly G1, G3 & G4. | |
| 936 | |
| 937 // Inputs: | |
| 938 // G2_thread - TLS | |
| 939 // G5_method - Method oop | |
| 710 | 940 // G4 (Gargs) - Pointer to interpreter's args |
| 941 // O0..O4 - free for scratch | |
| 942 // O5_savedSP - Caller's saved SP, to be restored if needed | |
| 0 | 943 // O6 - Current SP! |
| 944 // O7 - Valid return address | |
| 710 | 945 // L0-L7, I0-I7 - Caller's temps (no frame pushed yet) |
| 0 | 946 |
| 947 // Outputs: | |
| 948 // G2_thread - TLS | |
| 949 // G1, G4 - Outgoing long args in 32-bit build | |
| 950 // O0-O5 - Outgoing args in compiled layout | |
| 951 // O6 - Adjusted or restored SP | |
| 952 // O7 - Valid return address | |
| 953 // L0-L7, I0-I7 - Caller's temps (no frame pushed yet) | |
| 954 // F0-F7 - more outgoing args | |
| 955 | |
| 956 | |
| 710 | 957 // Gargs is the incoming argument base, and also an outgoing argument. |
| 0 | 958 __ sub(Gargs, BytesPerWord, Gargs); |
| 959 | |
| 960 #ifdef ASSERT | |
| 961 { | |
| 962 // on entry OsavedSP and SP should be equal | |
| 963 Label ok; | |
| 964 __ cmp(O5_savedSP, SP); | |
| 965 __ br(Assembler::equal, false, Assembler::pt, ok); | |
| 966 __ delayed()->nop(); | |
| 967 __ stop("I5_savedSP not set"); | |
| 968 __ should_not_reach_here(); | |
| 969 __ bind(ok); | |
| 970 } | |
| 971 #endif | |
| 972 | |
| 973 // ON ENTRY TO THE CODE WE ARE MAKING, WE HAVE AN INTERPRETED FRAME | |
| 974 // WITH O7 HOLDING A VALID RETURN PC | |
| 975 // | |
| 976 // | | | |
| 977 // : java stack : | |
| 978 // | | | |
| 979 // +--------------+ <--- start of outgoing args | |
| 980 // | receiver | | | |
| 981 // : rest of args : |---size is java-arg-words | |
| 982 // | | | | |
| 983 // +--------------+ <--- O4_args (misaligned) and Lesp if prior is not C2I | |
| 984 // | | | | |
| 985 // : unused : |---Space for max Java stack, plus stack alignment | |
| 986 // | | | | |
| 987 // +--------------+ <--- SP + 16*wordsize | |
| 988 // | | | |
| 989 // : window : | |
| 990 // | | | |
| 991 // +--------------+ <--- SP | |
| 992 | |
| 993 // WE REPACK THE STACK. We use the common calling convention layout as | |
| 994 // discovered by calling SharedRuntime::calling_convention. We assume it | |
| 995 // causes an arbitrary shuffle of memory, which may require some register | |
| 996 // temps to do the shuffle. We hope for (and optimize for) the case where | |
| 997 // temps are not needed. We may have to resize the stack slightly, in case | |
| 998 // we need alignment padding (32-bit interpreter can pass longs & doubles | |
| 999 // misaligned, but the compilers expect them aligned). | |
| 1000 // | |
| 1001 // | | | |
| 1002 // : java stack : | |
| 1003 // | | | |
| 1004 // +--------------+ <--- start of outgoing args | |
| 1005 // | pad, align | | | |
| 1006 // +--------------+ | | |
| 1007 // | ints, floats | |---Outgoing stack args, packed low. | |
| 1008 // +--------------+ | First few args in registers. | |
| 1009 // : doubles : | | |
| 1010 // | longs | | | |
| 1011 // +--------------+ <--- SP' + 16*wordsize | |
| 1012 // | | | |
| 1013 // : window : | |
| 1014 // | | | |
| 1015 // +--------------+ <--- SP' | |
| 1016 | |
| 1017 // ON EXIT FROM THE CODE WE ARE MAKING, WE STILL HAVE AN INTERPRETED FRAME | |
| 1018 // WITH O7 HOLDING A VALID RETURN PC - ITS JUST THAT THE ARGS ARE NOW SETUP | |
| 1019 // FOR COMPILED CODE AND THE FRAME SLIGHTLY GROWN. | |
| 1020 | |
| 1021 // Cut-out for having no stack args. Since up to 6 args are passed | |
| 1022 // in registers, we will commonly have no stack args. | |
| 1023 if (comp_args_on_stack > 0) { | |
| 1024 | |
| 1025 // Convert VMReg stack slots to words. | |
| 1026 int comp_words_on_stack = round_to(comp_args_on_stack*VMRegImpl::stack_slot_size, wordSize)>>LogBytesPerWord; | |
| 1027 // Round up to miminum stack alignment, in wordSize | |
| 1028 comp_words_on_stack = round_to(comp_words_on_stack, 2); | |
| 1029 // Now compute the distance from Lesp to SP. This calculation does not | |
| 1030 // include the space for total_args_passed because Lesp has not yet popped | |
| 1031 // the arguments. | |
| 1032 __ sub(SP, (comp_words_on_stack)*wordSize, SP); | |
| 1033 } | |
| 1034 | |
| 1035 // Will jump to the compiled code just as if compiled code was doing it. | |
| 1036 // Pre-load the register-jump target early, to schedule it better. | |
| 1037 __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3); | |
| 1038 | |
| 1039 // Now generate the shuffle code. Pick up all register args and move the | |
| 1040 // rest through G1_scratch. | |
| 1041 for (int i=0; i<total_args_passed; i++) { | |
| 1042 if (sig_bt[i] == T_VOID) { | |
| 1043 // Longs and doubles are passed in native word order, but misaligned | |
| 1044 // in the 32-bit build. | |
| 1045 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
| 1046 continue; | |
| 1047 } | |
| 1048 | |
| 1049 // Pick up 0, 1 or 2 words from Lesp+offset. Assume mis-aligned in the | |
| 1050 // 32-bit build and aligned in the 64-bit build. Look for the obvious | |
| 1051 // ldx/lddf optimizations. | |
| 1052 | |
| 1053 // Load in argument order going down. | |
| 1054 const int ld_off = (total_args_passed-i)*Interpreter::stackElementSize(); | |
| 1055 set_Rdisp(G1_scratch); | |
| 1056 | |
| 1057 VMReg r_1 = regs[i].first(); | |
| 1058 VMReg r_2 = regs[i].second(); | |
| 1059 if (!r_1->is_valid()) { | |
| 1060 assert(!r_2->is_valid(), ""); | |
| 1061 continue; | |
| 1062 } | |
| 1063 if (r_1->is_stack()) { // Pretend stack targets are loaded into F8/F9 | |
| 1064 r_1 = F8->as_VMReg(); // as part of the load/store shuffle | |
| 1065 if (r_2->is_valid()) r_2 = r_1->next(); | |
| 1066 } | |
| 1067 if (r_1->is_Register()) { // Register argument | |
| 1068 Register r = r_1->as_Register()->after_restore(); | |
| 1069 if (!r_2->is_valid()) { | |
| 1070 __ ld(Gargs, arg_slot(ld_off), r); | |
| 1071 } else { | |
| 1072 #ifdef _LP64 | |
| 1073 // In V9, longs are given 2 64-bit slots in the interpreter, but the | |
| 1074 // data is passed in only 1 slot. | |
|
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1075 RegisterOrConstant slot = (sig_bt[i] == T_LONG) ? |
| 0 | 1076 next_arg_slot(ld_off) : arg_slot(ld_off); |
| 1077 __ ldx(Gargs, slot, r); | |
| 1078 #else | |
| 1079 // Need to load a 64-bit value into G1/G4, but G1/G4 is being used in the | |
| 1080 // stack shuffle. Load the first 2 longs into G1/G4 later. | |
| 1081 #endif | |
| 1082 } | |
| 1083 } else { | |
| 1084 assert(r_1->is_FloatRegister(), ""); | |
| 1085 if (!r_2->is_valid()) { | |
| 1086 __ ldf(FloatRegisterImpl::S, Gargs, arg_slot(ld_off), r_1->as_FloatRegister()); | |
| 1087 } else { | |
| 1088 #ifdef _LP64 | |
| 1089 // In V9, doubles are given 2 64-bit slots in the interpreter, but the | |
| 1090 // data is passed in only 1 slot. This code also handles longs that | |
| 1091 // are passed on the stack, but need a stack-to-stack move through a | |
| 1092 // spare float register. | |
|
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6879902: CTW failure jdk6_18/hotspot/src/cpu/sparc/vm/assembler_sparc.hpp:845
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1093 RegisterOrConstant slot = (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) ? |
| 0 | 1094 next_arg_slot(ld_off) : arg_slot(ld_off); |
| 1095 __ ldf(FloatRegisterImpl::D, Gargs, slot, r_1->as_FloatRegister()); | |
| 1096 #else | |
| 1097 // Need to marshal 64-bit value from misaligned Lesp loads | |
| 1098 __ ldf(FloatRegisterImpl::S, Gargs, next_arg_slot(ld_off), r_1->as_FloatRegister()); | |
| 1099 __ ldf(FloatRegisterImpl::S, Gargs, arg_slot(ld_off), r_2->as_FloatRegister()); | |
| 1100 #endif | |
| 1101 } | |
| 1102 } | |
| 1103 // Was the argument really intended to be on the stack, but was loaded | |
| 1104 // into F8/F9? | |
| 1105 if (regs[i].first()->is_stack()) { | |
| 1106 assert(r_1->as_FloatRegister() == F8, "fix this code"); | |
| 1107 // Convert stack slot to an SP offset | |
| 1108 int st_off = reg2offset(regs[i].first()) + STACK_BIAS; | |
| 1109 // Store down the shuffled stack word. Target address _is_ aligned. | |
|
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1110 RegisterOrConstant slot = __ ensure_simm13_or_reg(st_off, Rdisp); |
|
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1111 if (!r_2->is_valid()) __ stf(FloatRegisterImpl::S, r_1->as_FloatRegister(), SP, slot); |
|
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1112 else __ stf(FloatRegisterImpl::D, r_1->as_FloatRegister(), SP, slot); |
| 0 | 1113 } |
| 1114 } | |
| 1115 bool made_space = false; | |
| 1116 #ifndef _LP64 | |
| 1117 // May need to pick up a few long args in G1/G4 | |
| 1118 bool g4_crushed = false; | |
| 1119 bool g3_crushed = false; | |
| 1120 for (int i=0; i<total_args_passed; i++) { | |
| 1121 if (regs[i].first()->is_Register() && regs[i].second()->is_valid()) { | |
| 1122 // Load in argument order going down | |
| 1123 int ld_off = (total_args_passed-i)*Interpreter::stackElementSize(); | |
| 1124 // Need to marshal 64-bit value from misaligned Lesp loads | |
| 1125 Register r = regs[i].first()->as_Register()->after_restore(); | |
| 1126 if (r == G1 || r == G4) { | |
| 1127 assert(!g4_crushed, "ordering problem"); | |
| 1128 if (r == G4){ | |
| 1129 g4_crushed = true; | |
| 1130 __ lduw(Gargs, arg_slot(ld_off) , G3_scratch); // Load lo bits | |
| 1131 __ ld (Gargs, next_arg_slot(ld_off), r); // Load hi bits | |
| 1132 } else { | |
| 1133 // better schedule this way | |
| 1134 __ ld (Gargs, next_arg_slot(ld_off), r); // Load hi bits | |
| 1135 __ lduw(Gargs, arg_slot(ld_off) , G3_scratch); // Load lo bits | |
| 1136 } | |
| 1137 g3_crushed = true; | |
| 1138 __ sllx(r, 32, r); | |
| 1139 __ or3(G3_scratch, r, r); | |
| 1140 } else { | |
| 1141 assert(r->is_out(), "longs passed in two O registers"); | |
| 1142 __ ld (Gargs, arg_slot(ld_off) , r->successor()); // Load lo bits | |
| 1143 __ ld (Gargs, next_arg_slot(ld_off), r); // Load hi bits | |
| 1144 } | |
| 1145 } | |
| 1146 } | |
| 1147 #endif | |
| 1148 | |
| 1149 // Jump to the compiled code just as if compiled code was doing it. | |
| 1150 // | |
| 1151 #ifndef _LP64 | |
| 1152 if (g3_crushed) { | |
| 1153 // Rats load was wasted, at least it is in cache... | |
| 727 | 1154 __ ld_ptr(G5_method, methodOopDesc::from_compiled_offset(), G3); |
| 0 | 1155 } |
| 1156 #endif /* _LP64 */ | |
| 1157 | |
| 1158 // 6243940 We might end up in handle_wrong_method if | |
| 1159 // the callee is deoptimized as we race thru here. If that | |
| 1160 // happens we don't want to take a safepoint because the | |
| 1161 // caller frame will look interpreted and arguments are now | |
| 1162 // "compiled" so it is much better to make this transition | |
| 1163 // invisible to the stack walking code. Unfortunately if | |
| 1164 // we try and find the callee by normal means a safepoint | |
| 1165 // is possible. So we stash the desired callee in the thread | |
| 1166 // and the vm will find there should this case occur. | |
| 727 | 1167 Address callee_target_addr(G2_thread, JavaThread::callee_target_offset()); |
| 0 | 1168 __ st_ptr(G5_method, callee_target_addr); |
| 1169 | |
| 1170 if (StressNonEntrant) { | |
| 1171 // Open a big window for deopt failure | |
| 1172 __ save_frame(0); | |
| 1173 __ mov(G0, L0); | |
| 1174 Label loop; | |
| 1175 __ bind(loop); | |
| 1176 __ sub(L0, 1, L0); | |
| 1177 __ br_null(L0, false, Assembler::pt, loop); | |
| 1178 __ delayed()->nop(); | |
| 1179 | |
| 1180 __ restore(); | |
| 1181 } | |
| 1182 | |
| 1183 | |
| 1184 __ jmpl(G3, 0, G0); | |
| 1185 __ delayed()->nop(); | |
| 1186 } | |
| 1187 | |
| 1188 // --------------------------------------------------------------- | |
| 1189 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm, | |
| 1190 int total_args_passed, | |
| 1191 // VMReg max_arg, | |
| 1192 int comp_args_on_stack, // VMRegStackSlots | |
| 1193 const BasicType *sig_bt, | |
|
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1194 const VMRegPair *regs, |
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1195 AdapterFingerPrint* fingerprint) { |
| 0 | 1196 address i2c_entry = __ pc(); |
| 1197 | |
| 1198 AdapterGenerator agen(masm); | |
| 1199 | |
| 1200 agen.gen_i2c_adapter(total_args_passed, comp_args_on_stack, sig_bt, regs); | |
| 1201 | |
| 1202 | |
| 1203 // ------------------------------------------------------------------------- | |
| 1204 // Generate a C2I adapter. On entry we know G5 holds the methodOop. The | |
| 1205 // args start out packed in the compiled layout. They need to be unpacked | |
| 1206 // into the interpreter layout. This will almost always require some stack | |
| 1207 // space. We grow the current (compiled) stack, then repack the args. We | |
| 1208 // finally end in a jump to the generic interpreter entry point. On exit | |
| 1209 // from the interpreter, the interpreter will restore our SP (lest the | |
| 1210 // compiled code, which relys solely on SP and not FP, get sick). | |
| 1211 | |
| 1212 address c2i_unverified_entry = __ pc(); | |
| 1213 Label skip_fixup; | |
| 1214 { | |
| 1215 #if !defined(_LP64) && defined(COMPILER2) | |
| 1216 Register R_temp = L0; // another scratch register | |
| 1217 #else | |
| 1218 Register R_temp = G1; // another scratch register | |
| 1219 #endif | |
| 1220 | |
| 727 | 1221 AddressLiteral ic_miss(SharedRuntime::get_ic_miss_stub()); |
| 0 | 1222 |
| 1223 __ verify_oop(O0); | |
| 1224 __ verify_oop(G5_method); | |
|
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|
1225 __ load_klass(O0, G3_scratch); |
| 0 | 1226 __ verify_oop(G3_scratch); |
| 1227 | |
| 1228 #if !defined(_LP64) && defined(COMPILER2) | |
| 1229 __ save(SP, -frame::register_save_words*wordSize, SP); | |
| 1230 __ ld_ptr(G5_method, compiledICHolderOopDesc::holder_klass_offset(), R_temp); | |
| 1231 __ verify_oop(R_temp); | |
| 1232 __ cmp(G3_scratch, R_temp); | |
| 1233 __ restore(); | |
| 1234 #else | |
| 1235 __ ld_ptr(G5_method, compiledICHolderOopDesc::holder_klass_offset(), R_temp); | |
| 1236 __ verify_oop(R_temp); | |
| 1237 __ cmp(G3_scratch, R_temp); | |
| 1238 #endif | |
| 1239 | |
| 1240 Label ok, ok2; | |
| 1241 __ brx(Assembler::equal, false, Assembler::pt, ok); | |
| 1242 __ delayed()->ld_ptr(G5_method, compiledICHolderOopDesc::holder_method_offset(), G5_method); | |
| 727 | 1243 __ jump_to(ic_miss, G3_scratch); |
| 0 | 1244 __ delayed()->nop(); |
| 1245 | |
| 1246 __ bind(ok); | |
| 1247 // Method might have been compiled since the call site was patched to | |
| 1248 // interpreted if that is the case treat it as a miss so we can get | |
| 1249 // the call site corrected. | |
| 1250 __ ld_ptr(G5_method, in_bytes(methodOopDesc::code_offset()), G3_scratch); | |
| 1251 __ bind(ok2); | |
| 1252 __ br_null(G3_scratch, false, __ pt, skip_fixup); | |
| 1253 __ delayed()->ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), G3_scratch); | |
| 727 | 1254 __ jump_to(ic_miss, G3_scratch); |
| 0 | 1255 __ delayed()->nop(); |
| 1256 | |
| 1257 } | |
| 1258 | |
| 1259 address c2i_entry = __ pc(); | |
| 1260 | |
| 1261 agen.gen_c2i_adapter(total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup); | |
| 1262 | |
| 1263 __ flush(); | |
|
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1264 return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
| 0 | 1265 |
| 1266 } | |
| 1267 | |
| 1268 // Helper function for native calling conventions | |
| 1269 static VMReg int_stk_helper( int i ) { | |
| 1270 // Bias any stack based VMReg we get by ignoring the window area | |
| 1271 // but not the register parameter save area. | |
| 1272 // | |
| 1273 // This is strange for the following reasons. We'd normally expect | |
| 1274 // the calling convention to return an VMReg for a stack slot | |
| 1275 // completely ignoring any abi reserved area. C2 thinks of that | |
| 1276 // abi area as only out_preserve_stack_slots. This does not include | |
| 1277 // the area allocated by the C abi to store down integer arguments | |
| 1278 // because the java calling convention does not use it. So | |
| 1279 // since c2 assumes that there are only out_preserve_stack_slots | |
| 1280 // to bias the optoregs (which impacts VMRegs) when actually referencing any actual stack | |
| 1281 // location the c calling convention must add in this bias amount | |
| 1282 // to make up for the fact that the out_preserve_stack_slots is | |
| 1283 // insufficient for C calls. What a mess. I sure hope those 6 | |
| 1284 // stack words were worth it on every java call! | |
| 1285 | |
| 1286 // Another way of cleaning this up would be for out_preserve_stack_slots | |
| 1287 // to take a parameter to say whether it was C or java calling conventions. | |
| 1288 // Then things might look a little better (but not much). | |
| 1289 | |
| 1290 int mem_parm_offset = i - SPARC_ARGS_IN_REGS_NUM; | |
| 1291 if( mem_parm_offset < 0 ) { | |
| 1292 return as_oRegister(i)->as_VMReg(); | |
| 1293 } else { | |
| 1294 int actual_offset = (mem_parm_offset + frame::memory_parameter_word_sp_offset) * VMRegImpl::slots_per_word; | |
| 1295 // Now return a biased offset that will be correct when out_preserve_slots is added back in | |
| 1296 return VMRegImpl::stack2reg(actual_offset - SharedRuntime::out_preserve_stack_slots()); | |
| 1297 } | |
| 1298 } | |
| 1299 | |
| 1300 | |
| 1301 int SharedRuntime::c_calling_convention(const BasicType *sig_bt, | |
| 1302 VMRegPair *regs, | |
| 1303 int total_args_passed) { | |
| 1304 | |
| 1305 // Return the number of VMReg stack_slots needed for the args. | |
| 1306 // This value does not include an abi space (like register window | |
| 1307 // save area). | |
| 1308 | |
| 1309 // The native convention is V8 if !LP64 | |
| 1310 // The LP64 convention is the V9 convention which is slightly more sane. | |
| 1311 | |
| 1312 // We return the amount of VMReg stack slots we need to reserve for all | |
| 1313 // the arguments NOT counting out_preserve_stack_slots. Since we always | |
| 1314 // have space for storing at least 6 registers to memory we start with that. | |
| 1315 // See int_stk_helper for a further discussion. | |
| 1316 int max_stack_slots = (frame::varargs_offset * VMRegImpl::slots_per_word) - SharedRuntime::out_preserve_stack_slots(); | |
| 1317 | |
| 1318 #ifdef _LP64 | |
| 1319 // V9 convention: All things "as-if" on double-wide stack slots. | |
| 1320 // Hoist any int/ptr/long's in the first 6 to int regs. | |
| 1321 // Hoist any flt/dbl's in the first 16 dbl regs. | |
| 1322 int j = 0; // Count of actual args, not HALVES | |
| 1323 for( int i=0; i<total_args_passed; i++, j++ ) { | |
| 1324 switch( sig_bt[i] ) { | |
| 1325 case T_BOOLEAN: | |
| 1326 case T_BYTE: | |
| 1327 case T_CHAR: | |
| 1328 case T_INT: | |
| 1329 case T_SHORT: | |
| 1330 regs[i].set1( int_stk_helper( j ) ); break; | |
| 1331 case T_LONG: | |
| 1332 assert( sig_bt[i+1] == T_VOID, "expecting half" ); | |
| 1333 case T_ADDRESS: // raw pointers, like current thread, for VM calls | |
| 1334 case T_ARRAY: | |
| 1335 case T_OBJECT: | |
| 1336 regs[i].set2( int_stk_helper( j ) ); | |
| 1337 break; | |
| 1338 case T_FLOAT: | |
| 1339 if ( j < 16 ) { | |
| 1340 // V9ism: floats go in ODD registers | |
| 1341 regs[i].set1(as_FloatRegister(1 + (j<<1))->as_VMReg()); | |
| 1342 } else { | |
| 1343 // V9ism: floats go in ODD stack slot | |
| 1344 regs[i].set1(VMRegImpl::stack2reg(1 + (j<<1))); | |
| 1345 } | |
| 1346 break; | |
| 1347 case T_DOUBLE: | |
| 1348 assert( sig_bt[i+1] == T_VOID, "expecting half" ); | |
| 1349 if ( j < 16 ) { | |
| 1350 // V9ism: doubles go in EVEN/ODD regs | |
| 1351 regs[i].set2(as_FloatRegister(j<<1)->as_VMReg()); | |
| 1352 } else { | |
| 1353 // V9ism: doubles go in EVEN/ODD stack slots | |
| 1354 regs[i].set2(VMRegImpl::stack2reg(j<<1)); | |
| 1355 } | |
| 1356 break; | |
| 1357 case T_VOID: regs[i].set_bad(); j--; break; // Do not count HALVES | |
| 1358 default: | |
| 1359 ShouldNotReachHere(); | |
| 1360 } | |
| 1361 if (regs[i].first()->is_stack()) { | |
| 1362 int off = regs[i].first()->reg2stack(); | |
| 1363 if (off > max_stack_slots) max_stack_slots = off; | |
| 1364 } | |
| 1365 if (regs[i].second()->is_stack()) { | |
| 1366 int off = regs[i].second()->reg2stack(); | |
| 1367 if (off > max_stack_slots) max_stack_slots = off; | |
| 1368 } | |
| 1369 } | |
| 1370 | |
| 1371 #else // _LP64 | |
| 1372 // V8 convention: first 6 things in O-regs, rest on stack. | |
| 1373 // Alignment is willy-nilly. | |
| 1374 for( int i=0; i<total_args_passed; i++ ) { | |
| 1375 switch( sig_bt[i] ) { | |
| 1376 case T_ADDRESS: // raw pointers, like current thread, for VM calls | |
| 1377 case T_ARRAY: | |
| 1378 case T_BOOLEAN: | |
| 1379 case T_BYTE: | |
| 1380 case T_CHAR: | |
| 1381 case T_FLOAT: | |
| 1382 case T_INT: | |
| 1383 case T_OBJECT: | |
| 1384 case T_SHORT: | |
| 1385 regs[i].set1( int_stk_helper( i ) ); | |
| 1386 break; | |
| 1387 case T_DOUBLE: | |
| 1388 case T_LONG: | |
| 1389 assert( sig_bt[i+1] == T_VOID, "expecting half" ); | |
| 1390 regs[i].set_pair( int_stk_helper( i+1 ), int_stk_helper( i ) ); | |
| 1391 break; | |
| 1392 case T_VOID: regs[i].set_bad(); break; | |
| 1393 default: | |
| 1394 ShouldNotReachHere(); | |
| 1395 } | |
| 1396 if (regs[i].first()->is_stack()) { | |
| 1397 int off = regs[i].first()->reg2stack(); | |
| 1398 if (off > max_stack_slots) max_stack_slots = off; | |
| 1399 } | |
| 1400 if (regs[i].second()->is_stack()) { | |
| 1401 int off = regs[i].second()->reg2stack(); | |
| 1402 if (off > max_stack_slots) max_stack_slots = off; | |
| 1403 } | |
| 1404 } | |
| 1405 #endif // _LP64 | |
| 1406 | |
| 1407 return round_to(max_stack_slots + 1, 2); | |
| 1408 | |
| 1409 } | |
| 1410 | |
| 1411 | |
| 1412 // --------------------------------------------------------------------------- | |
| 1413 void SharedRuntime::save_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
| 1414 switch (ret_type) { | |
| 1415 case T_FLOAT: | |
| 1416 __ stf(FloatRegisterImpl::S, F0, SP, frame_slots*VMRegImpl::stack_slot_size - 4+STACK_BIAS); | |
| 1417 break; | |
| 1418 case T_DOUBLE: | |
| 1419 __ stf(FloatRegisterImpl::D, F0, SP, frame_slots*VMRegImpl::stack_slot_size - 8+STACK_BIAS); | |
| 1420 break; | |
| 1421 } | |
| 1422 } | |
| 1423 | |
| 1424 void SharedRuntime::restore_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
| 1425 switch (ret_type) { | |
| 1426 case T_FLOAT: | |
| 1427 __ ldf(FloatRegisterImpl::S, SP, frame_slots*VMRegImpl::stack_slot_size - 4+STACK_BIAS, F0); | |
| 1428 break; | |
| 1429 case T_DOUBLE: | |
| 1430 __ ldf(FloatRegisterImpl::D, SP, frame_slots*VMRegImpl::stack_slot_size - 8+STACK_BIAS, F0); | |
| 1431 break; | |
| 1432 } | |
| 1433 } | |
| 1434 | |
| 1435 // Check and forward and pending exception. Thread is stored in | |
| 1436 // L7_thread_cache and possibly NOT in G2_thread. Since this is a native call, there | |
| 1437 // is no exception handler. We merely pop this frame off and throw the | |
| 1438 // exception in the caller's frame. | |
| 1439 static void check_forward_pending_exception(MacroAssembler *masm, Register Rex_oop) { | |
| 1440 Label L; | |
| 1441 __ br_null(Rex_oop, false, Assembler::pt, L); | |
| 1442 __ delayed()->mov(L7_thread_cache, G2_thread); // restore in case we have exception | |
| 1443 // Since this is a native call, we *know* the proper exception handler | |
| 1444 // without calling into the VM: it's the empty function. Just pop this | |
| 1445 // frame and then jump to forward_exception_entry; O7 will contain the | |
| 1446 // native caller's return PC. | |
| 727 | 1447 AddressLiteral exception_entry(StubRoutines::forward_exception_entry()); |
| 1448 __ jump_to(exception_entry, G3_scratch); | |
| 0 | 1449 __ delayed()->restore(); // Pop this frame off. |
| 1450 __ bind(L); | |
| 1451 } | |
| 1452 | |
| 1453 // A simple move of integer like type | |
| 1454 static void simple_move32(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
| 1455 if (src.first()->is_stack()) { | |
| 1456 if (dst.first()->is_stack()) { | |
| 1457 // stack to stack | |
| 1458 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, L5); | |
| 1459 __ st(L5, SP, reg2offset(dst.first()) + STACK_BIAS); | |
| 1460 } else { | |
| 1461 // stack to reg | |
| 1462 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
| 1463 } | |
| 1464 } else if (dst.first()->is_stack()) { | |
| 1465 // reg to stack | |
| 1466 __ st(src.first()->as_Register(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
| 1467 } else { | |
| 1468 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
| 1469 } | |
| 1470 } | |
| 1471 | |
| 1472 // On 64 bit we will store integer like items to the stack as | |
| 1473 // 64 bits items (sparc abi) even though java would only store | |
| 1474 // 32bits for a parameter. On 32bit it will simply be 32 bits | |
| 1475 // So this routine will do 32->32 on 32bit and 32->64 on 64bit | |
| 1476 static void move32_64(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
| 1477 if (src.first()->is_stack()) { | |
| 1478 if (dst.first()->is_stack()) { | |
| 1479 // stack to stack | |
| 1480 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, L5); | |
| 1481 __ st_ptr(L5, SP, reg2offset(dst.first()) + STACK_BIAS); | |
| 1482 } else { | |
| 1483 // stack to reg | |
| 1484 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
| 1485 } | |
| 1486 } else if (dst.first()->is_stack()) { | |
| 1487 // reg to stack | |
| 1488 __ st_ptr(src.first()->as_Register(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
| 1489 } else { | |
| 1490 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
| 1491 } | |
| 1492 } | |
| 1493 | |
| 1494 | |
| 1495 // An oop arg. Must pass a handle not the oop itself | |
| 1496 static void object_move(MacroAssembler* masm, | |
| 1497 OopMap* map, | |
| 1498 int oop_handle_offset, | |
| 1499 int framesize_in_slots, | |
| 1500 VMRegPair src, | |
| 1501 VMRegPair dst, | |
| 1502 bool is_receiver, | |
| 1503 int* receiver_offset) { | |
| 1504 | |
| 1505 // must pass a handle. First figure out the location we use as a handle | |
| 1506 | |
| 1507 if (src.first()->is_stack()) { | |
| 1508 // Oop is already on the stack | |
| 1509 Register rHandle = dst.first()->is_stack() ? L5 : dst.first()->as_Register(); | |
| 1510 __ add(FP, reg2offset(src.first()) + STACK_BIAS, rHandle); | |
| 1511 __ ld_ptr(rHandle, 0, L4); | |
| 1512 #ifdef _LP64 | |
| 1513 __ movr( Assembler::rc_z, L4, G0, rHandle ); | |
| 1514 #else | |
| 1515 __ tst( L4 ); | |
| 1516 __ movcc( Assembler::zero, false, Assembler::icc, G0, rHandle ); | |
| 1517 #endif | |
| 1518 if (dst.first()->is_stack()) { | |
| 1519 __ st_ptr(rHandle, SP, reg2offset(dst.first()) + STACK_BIAS); | |
| 1520 } | |
| 1521 int offset_in_older_frame = src.first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); | |
| 1522 if (is_receiver) { | |
| 1523 *receiver_offset = (offset_in_older_frame + framesize_in_slots) * VMRegImpl::stack_slot_size; | |
| 1524 } | |
| 1525 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + framesize_in_slots)); | |
| 1526 } else { | |
| 1527 // Oop is in an input register pass we must flush it to the stack | |
| 1528 const Register rOop = src.first()->as_Register(); | |
| 1529 const Register rHandle = L5; | |
| 1530 int oop_slot = rOop->input_number() * VMRegImpl::slots_per_word + oop_handle_offset; | |
| 1531 int offset = oop_slot*VMRegImpl::stack_slot_size; | |
| 1532 Label skip; | |
| 1533 __ st_ptr(rOop, SP, offset + STACK_BIAS); | |
| 1534 if (is_receiver) { | |
| 1535 *receiver_offset = oop_slot * VMRegImpl::stack_slot_size; | |
| 1536 } | |
| 1537 map->set_oop(VMRegImpl::stack2reg(oop_slot)); | |
| 1538 __ add(SP, offset + STACK_BIAS, rHandle); | |
| 1539 #ifdef _LP64 | |
| 1540 __ movr( Assembler::rc_z, rOop, G0, rHandle ); | |
| 1541 #else | |
| 1542 __ tst( rOop ); | |
| 1543 __ movcc( Assembler::zero, false, Assembler::icc, G0, rHandle ); | |
| 1544 #endif | |
| 1545 | |
| 1546 if (dst.first()->is_stack()) { | |
| 1547 __ st_ptr(rHandle, SP, reg2offset(dst.first()) + STACK_BIAS); | |
| 1548 } else { | |
| 1549 __ mov(rHandle, dst.first()->as_Register()); | |
| 1550 } | |
| 1551 } | |
| 1552 } | |
| 1553 | |
| 1554 // A float arg may have to do float reg int reg conversion | |
| 1555 static void float_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
| 1556 assert(!src.second()->is_valid() && !dst.second()->is_valid(), "bad float_move"); | |
| 1557 | |
| 1558 if (src.first()->is_stack()) { | |
| 1559 if (dst.first()->is_stack()) { | |
| 1560 // stack to stack the easiest of the bunch | |
| 1561 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, L5); | |
| 1562 __ st(L5, SP, reg2offset(dst.first()) + STACK_BIAS); | |
| 1563 } else { | |
| 1564 // stack to reg | |
| 1565 if (dst.first()->is_Register()) { | |
| 1566 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
| 1567 } else { | |
| 1568 __ ldf(FloatRegisterImpl::S, FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_FloatRegister()); | |
| 1569 } | |
| 1570 } | |
| 1571 } else if (dst.first()->is_stack()) { | |
| 1572 // reg to stack | |
| 1573 if (src.first()->is_Register()) { | |
| 1574 __ st(src.first()->as_Register(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
| 1575 } else { | |
| 1576 __ stf(FloatRegisterImpl::S, src.first()->as_FloatRegister(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
| 1577 } | |
| 1578 } else { | |
| 1579 // reg to reg | |
| 1580 if (src.first()->is_Register()) { | |
| 1581 if (dst.first()->is_Register()) { | |
| 1582 // gpr -> gpr | |
| 1583 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
| 1584 } else { | |
| 1585 // gpr -> fpr | |
| 1586 __ st(src.first()->as_Register(), FP, -4 + STACK_BIAS); | |
| 1587 __ ldf(FloatRegisterImpl::S, FP, -4 + STACK_BIAS, dst.first()->as_FloatRegister()); | |
| 1588 } | |
| 1589 } else if (dst.first()->is_Register()) { | |
| 1590 // fpr -> gpr | |
| 1591 __ stf(FloatRegisterImpl::S, src.first()->as_FloatRegister(), FP, -4 + STACK_BIAS); | |
| 1592 __ ld(FP, -4 + STACK_BIAS, dst.first()->as_Register()); | |
| 1593 } else { | |
| 1594 // fpr -> fpr | |
| 1595 // In theory these overlap but the ordering is such that this is likely a nop | |
| 1596 if ( src.first() != dst.first()) { | |
| 1597 __ fmov(FloatRegisterImpl::S, src.first()->as_FloatRegister(), dst.first()->as_FloatRegister()); | |
| 1598 } | |
| 1599 } | |
| 1600 } | |
| 1601 } | |
| 1602 | |
| 1603 static void split_long_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
| 1604 VMRegPair src_lo(src.first()); | |
| 1605 VMRegPair src_hi(src.second()); | |
| 1606 VMRegPair dst_lo(dst.first()); | |
| 1607 VMRegPair dst_hi(dst.second()); | |
| 1608 simple_move32(masm, src_lo, dst_lo); | |
| 1609 simple_move32(masm, src_hi, dst_hi); | |
| 1610 } | |
| 1611 | |
| 1612 // A long move | |
| 1613 static void long_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
| 1614 | |
| 1615 // Do the simple ones here else do two int moves | |
| 1616 if (src.is_single_phys_reg() ) { | |
| 1617 if (dst.is_single_phys_reg()) { | |
| 1618 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
| 1619 } else { | |
| 1620 // split src into two separate registers | |
| 1621 // Remember hi means hi address or lsw on sparc | |
| 1622 // Move msw to lsw | |
| 1623 if (dst.second()->is_reg()) { | |
| 1624 // MSW -> MSW | |
| 1625 __ srax(src.first()->as_Register(), 32, dst.first()->as_Register()); | |
| 1626 // Now LSW -> LSW | |
| 1627 // this will only move lo -> lo and ignore hi | |
| 1628 VMRegPair split(dst.second()); | |
| 1629 simple_move32(masm, src, split); | |
| 1630 } else { | |
| 1631 VMRegPair split(src.first(), L4->as_VMReg()); | |
| 1632 // MSW -> MSW (lo ie. first word) | |
| 1633 __ srax(src.first()->as_Register(), 32, L4); | |
| 1634 split_long_move(masm, split, dst); | |
| 1635 } | |
| 1636 } | |
| 1637 } else if (dst.is_single_phys_reg()) { | |
| 1638 if (src.is_adjacent_aligned_on_stack(2)) { | |
| 304 | 1639 __ ldx(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); |
| 0 | 1640 } else { |
| 1641 // dst is a single reg. | |
| 1642 // Remember lo is low address not msb for stack slots | |
| 1643 // and lo is the "real" register for registers | |
| 1644 // src is | |
| 1645 | |
| 1646 VMRegPair split; | |
| 1647 | |
| 1648 if (src.first()->is_reg()) { | |
| 1649 // src.lo (msw) is a reg, src.hi is stk/reg | |
| 1650 // we will move: src.hi (LSW) -> dst.lo, src.lo (MSW) -> src.lo [the MSW is in the LSW of the reg] | |
| 1651 split.set_pair(dst.first(), src.first()); | |
| 1652 } else { | |
| 1653 // msw is stack move to L5 | |
| 1654 // lsw is stack move to dst.lo (real reg) | |
| 1655 // we will move: src.hi (LSW) -> dst.lo, src.lo (MSW) -> L5 | |
| 1656 split.set_pair(dst.first(), L5->as_VMReg()); | |
| 1657 } | |
| 1658 | |
| 1659 // src.lo -> src.lo/L5, src.hi -> dst.lo (the real reg) | |
| 1660 // msw -> src.lo/L5, lsw -> dst.lo | |
| 1661 split_long_move(masm, src, split); | |
| 1662 | |
| 1663 // So dst now has the low order correct position the | |
| 1664 // msw half | |
| 1665 __ sllx(split.first()->as_Register(), 32, L5); | |
| 1666 | |
| 1667 const Register d = dst.first()->as_Register(); | |
| 1668 __ or3(L5, d, d); | |
| 1669 } | |
| 1670 } else { | |
| 1671 // For LP64 we can probably do better. | |
| 1672 split_long_move(masm, src, dst); | |
| 1673 } | |
| 1674 } | |
| 1675 | |
| 1676 // A double move | |
| 1677 static void double_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
| 1678 | |
| 1679 // The painful thing here is that like long_move a VMRegPair might be | |
| 1680 // 1: a single physical register | |
| 1681 // 2: two physical registers (v8) | |
| 1682 // 3: a physical reg [lo] and a stack slot [hi] (v8) | |
| 1683 // 4: two stack slots | |
| 1684 | |
| 1685 // Since src is always a java calling convention we know that the src pair | |
| 1686 // is always either all registers or all stack (and aligned?) | |
| 1687 | |
| 1688 // in a register [lo] and a stack slot [hi] | |
| 1689 if (src.first()->is_stack()) { | |
| 1690 if (dst.first()->is_stack()) { | |
| 1691 // stack to stack the easiest of the bunch | |
| 1692 // ought to be a way to do this where if alignment is ok we use ldd/std when possible | |
| 1693 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, L5); | |
| 1694 __ ld(FP, reg2offset(src.second()) + STACK_BIAS, L4); | |
| 1695 __ st(L5, SP, reg2offset(dst.first()) + STACK_BIAS); | |
| 1696 __ st(L4, SP, reg2offset(dst.second()) + STACK_BIAS); | |
| 1697 } else { | |
| 1698 // stack to reg | |
| 1699 if (dst.second()->is_stack()) { | |
| 1700 // stack -> reg, stack -> stack | |
| 1701 __ ld(FP, reg2offset(src.second()) + STACK_BIAS, L4); | |
| 1702 if (dst.first()->is_Register()) { | |
| 1703 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
| 1704 } else { | |
| 1705 __ ldf(FloatRegisterImpl::S, FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_FloatRegister()); | |
| 1706 } | |
| 1707 // This was missing. (very rare case) | |
| 1708 __ st(L4, SP, reg2offset(dst.second()) + STACK_BIAS); | |
| 1709 } else { | |
| 1710 // stack -> reg | |
| 1711 // Eventually optimize for alignment QQQ | |
| 1712 if (dst.first()->is_Register()) { | |
| 1713 __ ld(FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_Register()); | |
| 1714 __ ld(FP, reg2offset(src.second()) + STACK_BIAS, dst.second()->as_Register()); | |
| 1715 } else { | |
| 1716 __ ldf(FloatRegisterImpl::S, FP, reg2offset(src.first()) + STACK_BIAS, dst.first()->as_FloatRegister()); | |
| 1717 __ ldf(FloatRegisterImpl::S, FP, reg2offset(src.second()) + STACK_BIAS, dst.second()->as_FloatRegister()); | |
| 1718 } | |
| 1719 } | |
| 1720 } | |
| 1721 } else if (dst.first()->is_stack()) { | |
| 1722 // reg to stack | |
| 1723 if (src.first()->is_Register()) { | |
| 1724 // Eventually optimize for alignment QQQ | |
| 1725 __ st(src.first()->as_Register(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
| 1726 if (src.second()->is_stack()) { | |
| 1727 __ ld(FP, reg2offset(src.second()) + STACK_BIAS, L4); | |
| 1728 __ st(L4, SP, reg2offset(dst.second()) + STACK_BIAS); | |
| 1729 } else { | |
| 1730 __ st(src.second()->as_Register(), SP, reg2offset(dst.second()) + STACK_BIAS); | |
| 1731 } | |
| 1732 } else { | |
| 1733 // fpr to stack | |
| 1734 if (src.second()->is_stack()) { | |
| 1735 ShouldNotReachHere(); | |
| 1736 } else { | |
| 1737 // Is the stack aligned? | |
| 1738 if (reg2offset(dst.first()) & 0x7) { | |
| 1739 // No do as pairs | |
| 1740 __ stf(FloatRegisterImpl::S, src.first()->as_FloatRegister(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
| 1741 __ stf(FloatRegisterImpl::S, src.second()->as_FloatRegister(), SP, reg2offset(dst.second()) + STACK_BIAS); | |
| 1742 } else { | |
| 1743 __ stf(FloatRegisterImpl::D, src.first()->as_FloatRegister(), SP, reg2offset(dst.first()) + STACK_BIAS); | |
| 1744 } | |
| 1745 } | |
| 1746 } | |
| 1747 } else { | |
| 1748 // reg to reg | |
| 1749 if (src.first()->is_Register()) { | |
| 1750 if (dst.first()->is_Register()) { | |
| 1751 // gpr -> gpr | |
| 1752 __ mov(src.first()->as_Register(), dst.first()->as_Register()); | |
| 1753 __ mov(src.second()->as_Register(), dst.second()->as_Register()); | |
| 1754 } else { | |
| 1755 // gpr -> fpr | |
| 1756 // ought to be able to do a single store | |
| 1757 __ stx(src.first()->as_Register(), FP, -8 + STACK_BIAS); | |
| 1758 __ stx(src.second()->as_Register(), FP, -4 + STACK_BIAS); | |
| 1759 // ought to be able to do a single load | |
| 1760 __ ldf(FloatRegisterImpl::S, FP, -8 + STACK_BIAS, dst.first()->as_FloatRegister()); | |
| 1761 __ ldf(FloatRegisterImpl::S, FP, -4 + STACK_BIAS, dst.second()->as_FloatRegister()); | |
| 1762 } | |
| 1763 } else if (dst.first()->is_Register()) { | |
| 1764 // fpr -> gpr | |
| 1765 // ought to be able to do a single store | |
| 1766 __ stf(FloatRegisterImpl::D, src.first()->as_FloatRegister(), FP, -8 + STACK_BIAS); | |
| 1767 // ought to be able to do a single load | |
| 1768 // REMEMBER first() is low address not LSB | |
| 1769 __ ld(FP, -8 + STACK_BIAS, dst.first()->as_Register()); | |
| 1770 if (dst.second()->is_Register()) { | |
| 1771 __ ld(FP, -4 + STACK_BIAS, dst.second()->as_Register()); | |
| 1772 } else { | |
| 1773 __ ld(FP, -4 + STACK_BIAS, L4); | |
| 1774 __ st(L4, SP, reg2offset(dst.second()) + STACK_BIAS); | |
| 1775 } | |
| 1776 } else { | |
| 1777 // fpr -> fpr | |
| 1778 // In theory these overlap but the ordering is such that this is likely a nop | |
| 1779 if ( src.first() != dst.first()) { | |
| 1780 __ fmov(FloatRegisterImpl::D, src.first()->as_FloatRegister(), dst.first()->as_FloatRegister()); | |
| 1781 } | |
| 1782 } | |
| 1783 } | |
| 1784 } | |
| 1785 | |
| 1786 // Creates an inner frame if one hasn't already been created, and | |
| 1787 // saves a copy of the thread in L7_thread_cache | |
| 1788 static void create_inner_frame(MacroAssembler* masm, bool* already_created) { | |
| 1789 if (!*already_created) { | |
| 1790 __ save_frame(0); | |
| 1791 // Save thread in L7 (INNER FRAME); it crosses a bunch of VM calls below | |
| 1792 // Don't use save_thread because it smashes G2 and we merely want to save a | |
| 1793 // copy | |
| 1794 __ mov(G2_thread, L7_thread_cache); | |
| 1795 *already_created = true; | |
| 1796 } | |
| 1797 } | |
| 1798 | |
| 1799 // --------------------------------------------------------------------------- | |
| 1800 // Generate a native wrapper for a given method. The method takes arguments | |
| 1801 // in the Java compiled code convention, marshals them to the native | |
| 1802 // convention (handlizes oops, etc), transitions to native, makes the call, | |
| 1803 // returns to java state (possibly blocking), unhandlizes any result and | |
| 1804 // returns. | |
| 1805 nmethod *SharedRuntime::generate_native_wrapper(MacroAssembler* masm, | |
| 1806 methodHandle method, | |
| 1807 int total_in_args, | |
| 1808 int comp_args_on_stack, // in VMRegStackSlots | |
| 1809 BasicType *in_sig_bt, | |
| 1810 VMRegPair *in_regs, | |
| 1811 BasicType ret_type) { | |
| 1812 | |
| 1813 // Native nmethod wrappers never take possesion of the oop arguments. | |
| 1814 // So the caller will gc the arguments. The only thing we need an | |
| 1815 // oopMap for is if the call is static | |
| 1816 // | |
| 1817 // An OopMap for lock (and class if static), and one for the VM call itself | |
| 1818 OopMapSet *oop_maps = new OopMapSet(); | |
| 1819 intptr_t start = (intptr_t)__ pc(); | |
| 1820 | |
| 1821 // First thing make an ic check to see if we should even be here | |
| 1822 { | |
| 1823 Label L; | |
| 1824 const Register temp_reg = G3_scratch; | |
| 727 | 1825 AddressLiteral ic_miss(SharedRuntime::get_ic_miss_stub()); |
| 0 | 1826 __ verify_oop(O0); |
|
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|
1827 __ load_klass(O0, temp_reg); |
| 0 | 1828 __ cmp(temp_reg, G5_inline_cache_reg); |
| 1829 __ brx(Assembler::equal, true, Assembler::pt, L); | |
| 1830 __ delayed()->nop(); | |
| 1831 | |
| 727 | 1832 __ jump_to(ic_miss, temp_reg); |
| 0 | 1833 __ delayed()->nop(); |
| 1834 __ align(CodeEntryAlignment); | |
| 1835 __ bind(L); | |
| 1836 } | |
| 1837 | |
| 1838 int vep_offset = ((intptr_t)__ pc()) - start; | |
| 1839 | |
| 1840 #ifdef COMPILER1 | |
| 1841 if (InlineObjectHash && method->intrinsic_id() == vmIntrinsics::_hashCode) { | |
| 1842 // Object.hashCode can pull the hashCode from the header word | |
| 1843 // instead of doing a full VM transition once it's been computed. | |
| 1844 // Since hashCode is usually polymorphic at call sites we can't do | |
| 1845 // this optimization at the call site without a lot of work. | |
| 1846 Label slowCase; | |
| 1847 Register receiver = O0; | |
| 1848 Register result = O0; | |
| 1849 Register header = G3_scratch; | |
| 1850 Register hash = G3_scratch; // overwrite header value with hash value | |
| 1851 Register mask = G1; // to get hash field from header | |
| 1852 | |
| 1853 // Read the header and build a mask to get its hash field. Give up if the object is not unlocked. | |
| 1854 // We depend on hash_mask being at most 32 bits and avoid the use of | |
| 1855 // hash_mask_in_place because it could be larger than 32 bits in a 64-bit | |
| 1856 // vm: see markOop.hpp. | |
| 1857 __ ld_ptr(receiver, oopDesc::mark_offset_in_bytes(), header); | |
| 1858 __ sethi(markOopDesc::hash_mask, mask); | |
| 1859 __ btst(markOopDesc::unlocked_value, header); | |
| 1860 __ br(Assembler::zero, false, Assembler::pn, slowCase); | |
| 1861 if (UseBiasedLocking) { | |
| 1862 // Check if biased and fall through to runtime if so | |
| 1863 __ delayed()->nop(); | |
| 1864 __ btst(markOopDesc::biased_lock_bit_in_place, header); | |
| 1865 __ br(Assembler::notZero, false, Assembler::pn, slowCase); | |
| 1866 } | |
| 1867 __ delayed()->or3(mask, markOopDesc::hash_mask & 0x3ff, mask); | |
| 1868 | |
| 1869 // Check for a valid (non-zero) hash code and get its value. | |
| 1870 #ifdef _LP64 | |
| 1871 __ srlx(header, markOopDesc::hash_shift, hash); | |
| 1872 #else | |
| 1873 __ srl(header, markOopDesc::hash_shift, hash); | |
| 1874 #endif | |
| 1875 __ andcc(hash, mask, hash); | |
| 1876 __ br(Assembler::equal, false, Assembler::pn, slowCase); | |
| 1877 __ delayed()->nop(); | |
| 1878 | |
| 1879 // leaf return. | |
| 1880 __ retl(); | |
| 1881 __ delayed()->mov(hash, result); | |
| 1882 __ bind(slowCase); | |
| 1883 } | |
| 1884 #endif // COMPILER1 | |
| 1885 | |
| 1886 | |
| 1887 // We have received a description of where all the java arg are located | |
| 1888 // on entry to the wrapper. We need to convert these args to where | |
| 1889 // the jni function will expect them. To figure out where they go | |
| 1890 // we convert the java signature to a C signature by inserting | |
| 1891 // the hidden arguments as arg[0] and possibly arg[1] (static method) | |
| 1892 | |
| 1893 int total_c_args = total_in_args + 1; | |
| 1894 if (method->is_static()) { | |
| 1895 total_c_args++; | |
| 1896 } | |
| 1897 | |
| 1898 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_c_args); | |
| 1899 VMRegPair * out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_c_args); | |
| 1900 | |
| 1901 int argc = 0; | |
| 1902 out_sig_bt[argc++] = T_ADDRESS; | |
| 1903 if (method->is_static()) { | |
| 1904 out_sig_bt[argc++] = T_OBJECT; | |
| 1905 } | |
| 1906 | |
| 1907 for (int i = 0; i < total_in_args ; i++ ) { | |
| 1908 out_sig_bt[argc++] = in_sig_bt[i]; | |
| 1909 } | |
| 1910 | |
| 1911 // Now figure out where the args must be stored and how much stack space | |
| 1912 // they require (neglecting out_preserve_stack_slots but space for storing | |
| 1913 // the 1st six register arguments). It's weird see int_stk_helper. | |
| 1914 // | |
| 1915 int out_arg_slots; | |
| 1916 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); | |
| 1917 | |
| 1918 // Compute framesize for the wrapper. We need to handlize all oops in | |
| 1919 // registers. We must create space for them here that is disjoint from | |
| 1920 // the windowed save area because we have no control over when we might | |
| 1921 // flush the window again and overwrite values that gc has since modified. | |
| 1922 // (The live window race) | |
| 1923 // | |
| 1924 // We always just allocate 6 word for storing down these object. This allow | |
| 1925 // us to simply record the base and use the Ireg number to decide which | |
| 1926 // slot to use. (Note that the reg number is the inbound number not the | |
| 1927 // outbound number). | |
| 1928 // We must shuffle args to match the native convention, and include var-args space. | |
| 1929 | |
| 1930 // Calculate the total number of stack slots we will need. | |
| 1931 | |
| 1932 // First count the abi requirement plus all of the outgoing args | |
| 1933 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; | |
| 1934 | |
| 1935 // Now the space for the inbound oop handle area | |
| 1936 | |
| 1937 int oop_handle_offset = stack_slots; | |
| 1938 stack_slots += 6*VMRegImpl::slots_per_word; | |
| 1939 | |
| 1940 // Now any space we need for handlizing a klass if static method | |
| 1941 | |
| 1942 int oop_temp_slot_offset = 0; | |
| 1943 int klass_slot_offset = 0; | |
| 1944 int klass_offset = -1; | |
| 1945 int lock_slot_offset = 0; | |
| 1946 bool is_static = false; | |
| 1947 | |
| 1948 if (method->is_static()) { | |
| 1949 klass_slot_offset = stack_slots; | |
| 1950 stack_slots += VMRegImpl::slots_per_word; | |
| 1951 klass_offset = klass_slot_offset * VMRegImpl::stack_slot_size; | |
| 1952 is_static = true; | |
| 1953 } | |
| 1954 | |
| 1955 // Plus a lock if needed | |
| 1956 | |
| 1957 if (method->is_synchronized()) { | |
| 1958 lock_slot_offset = stack_slots; | |
| 1959 stack_slots += VMRegImpl::slots_per_word; | |
| 1960 } | |
| 1961 | |
| 1962 // Now a place to save return value or as a temporary for any gpr -> fpr moves | |
| 1963 stack_slots += 2; | |
| 1964 | |
| 1965 // Ok The space we have allocated will look like: | |
| 1966 // | |
| 1967 // | |
| 1968 // FP-> | | | |
| 1969 // |---------------------| | |
| 1970 // | 2 slots for moves | | |
| 1971 // |---------------------| | |
| 1972 // | lock box (if sync) | | |
| 1973 // |---------------------| <- lock_slot_offset | |
| 1974 // | klass (if static) | | |
| 1975 // |---------------------| <- klass_slot_offset | |
| 1976 // | oopHandle area | | |
| 1977 // |---------------------| <- oop_handle_offset | |
| 1978 // | outbound memory | | |
| 1979 // | based arguments | | |
| 1980 // | | | |
| 1981 // |---------------------| | |
| 1982 // | vararg area | | |
| 1983 // |---------------------| | |
| 1984 // | | | |
| 1985 // SP-> | out_preserved_slots | | |
| 1986 // | |
| 1987 // | |
| 1988 | |
| 1989 | |
| 1990 // Now compute actual number of stack words we need rounding to make | |
| 1991 // stack properly aligned. | |
| 1992 stack_slots = round_to(stack_slots, 2 * VMRegImpl::slots_per_word); | |
| 1993 | |
| 1994 int stack_size = stack_slots * VMRegImpl::stack_slot_size; | |
| 1995 | |
| 1996 // Generate stack overflow check before creating frame | |
| 1997 __ generate_stack_overflow_check(stack_size); | |
| 1998 | |
| 1999 // Generate a new frame for the wrapper. | |
| 2000 __ save(SP, -stack_size, SP); | |
| 2001 | |
| 2002 int frame_complete = ((intptr_t)__ pc()) - start; | |
| 2003 | |
| 2004 __ verify_thread(); | |
| 2005 | |
| 2006 | |
| 2007 // | |
| 2008 // We immediately shuffle the arguments so that any vm call we have to | |
| 2009 // make from here on out (sync slow path, jvmti, etc.) we will have | |
| 2010 // captured the oops from our caller and have a valid oopMap for | |
| 2011 // them. | |
| 2012 | |
| 2013 // ----------------- | |
| 2014 // The Grand Shuffle | |
| 2015 // | |
| 2016 // Natives require 1 or 2 extra arguments over the normal ones: the JNIEnv* | |
| 2017 // (derived from JavaThread* which is in L7_thread_cache) and, if static, | |
| 2018 // the class mirror instead of a receiver. This pretty much guarantees that | |
| 2019 // register layout will not match. We ignore these extra arguments during | |
| 2020 // the shuffle. The shuffle is described by the two calling convention | |
| 2021 // vectors we have in our possession. We simply walk the java vector to | |
| 2022 // get the source locations and the c vector to get the destinations. | |
| 2023 // Because we have a new window and the argument registers are completely | |
| 2024 // disjoint ( I0 -> O1, I1 -> O2, ...) we have nothing to worry about | |
| 2025 // here. | |
| 2026 | |
| 2027 // This is a trick. We double the stack slots so we can claim | |
| 2028 // the oops in the caller's frame. Since we are sure to have | |
| 2029 // more args than the caller doubling is enough to make | |
| 2030 // sure we can capture all the incoming oop args from the | |
| 2031 // caller. | |
| 2032 // | |
| 2033 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); | |
| 2034 int c_arg = total_c_args - 1; | |
| 2035 // Record sp-based slot for receiver on stack for non-static methods | |
| 2036 int receiver_offset = -1; | |
| 2037 | |
| 2038 // We move the arguments backward because the floating point registers | |
| 2039 // destination will always be to a register with a greater or equal register | |
| 2040 // number or the stack. | |
| 2041 | |
| 2042 #ifdef ASSERT | |
| 2043 bool reg_destroyed[RegisterImpl::number_of_registers]; | |
| 2044 bool freg_destroyed[FloatRegisterImpl::number_of_registers]; | |
| 2045 for ( int r = 0 ; r < RegisterImpl::number_of_registers ; r++ ) { | |
| 2046 reg_destroyed[r] = false; | |
| 2047 } | |
| 2048 for ( int f = 0 ; f < FloatRegisterImpl::number_of_registers ; f++ ) { | |
| 2049 freg_destroyed[f] = false; | |
| 2050 } | |
| 2051 | |
| 2052 #endif /* ASSERT */ | |
| 2053 | |
| 2054 for ( int i = total_in_args - 1; i >= 0 ; i--, c_arg-- ) { | |
| 2055 | |
| 2056 #ifdef ASSERT | |
| 2057 if (in_regs[i].first()->is_Register()) { | |
| 2058 assert(!reg_destroyed[in_regs[i].first()->as_Register()->encoding()], "ack!"); | |
| 2059 } else if (in_regs[i].first()->is_FloatRegister()) { | |
| 2060 assert(!freg_destroyed[in_regs[i].first()->as_FloatRegister()->encoding(FloatRegisterImpl::S)], "ack!"); | |
| 2061 } | |
| 2062 if (out_regs[c_arg].first()->is_Register()) { | |
| 2063 reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true; | |
| 2064 } else if (out_regs[c_arg].first()->is_FloatRegister()) { | |
| 2065 freg_destroyed[out_regs[c_arg].first()->as_FloatRegister()->encoding(FloatRegisterImpl::S)] = true; | |
| 2066 } | |
| 2067 #endif /* ASSERT */ | |
| 2068 | |
| 2069 switch (in_sig_bt[i]) { | |
| 2070 case T_ARRAY: | |
| 2071 case T_OBJECT: | |
| 2072 object_move(masm, map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg], | |
| 2073 ((i == 0) && (!is_static)), | |
| 2074 &receiver_offset); | |
| 2075 break; | |
| 2076 case T_VOID: | |
| 2077 break; | |
| 2078 | |
| 2079 case T_FLOAT: | |
| 2080 float_move(masm, in_regs[i], out_regs[c_arg]); | |
| 2081 break; | |
| 2082 | |
| 2083 case T_DOUBLE: | |
| 2084 assert( i + 1 < total_in_args && | |
| 2085 in_sig_bt[i + 1] == T_VOID && | |
| 2086 out_sig_bt[c_arg+1] == T_VOID, "bad arg list"); | |
| 2087 double_move(masm, in_regs[i], out_regs[c_arg]); | |
| 2088 break; | |
| 2089 | |
| 2090 case T_LONG : | |
| 2091 long_move(masm, in_regs[i], out_regs[c_arg]); | |
| 2092 break; | |
| 2093 | |
| 2094 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); | |
| 2095 | |
| 2096 default: | |
| 2097 move32_64(masm, in_regs[i], out_regs[c_arg]); | |
| 2098 } | |
| 2099 } | |
| 2100 | |
| 2101 // Pre-load a static method's oop into O1. Used both by locking code and | |
| 2102 // the normal JNI call code. | |
| 2103 if (method->is_static()) { | |
| 2104 __ set_oop_constant(JNIHandles::make_local(Klass::cast(method->method_holder())->java_mirror()), O1); | |
| 2105 | |
| 2106 // Now handlize the static class mirror in O1. It's known not-null. | |
| 2107 __ st_ptr(O1, SP, klass_offset + STACK_BIAS); | |
| 2108 map->set_oop(VMRegImpl::stack2reg(klass_slot_offset)); | |
| 2109 __ add(SP, klass_offset + STACK_BIAS, O1); | |
| 2110 } | |
| 2111 | |
| 2112 | |
| 2113 const Register L6_handle = L6; | |
| 2114 | |
| 2115 if (method->is_synchronized()) { | |
| 2116 __ mov(O1, L6_handle); | |
| 2117 } | |
| 2118 | |
| 2119 // We have all of the arguments setup at this point. We MUST NOT touch any Oregs | |
| 2120 // except O6/O7. So if we must call out we must push a new frame. We immediately | |
| 2121 // push a new frame and flush the windows. | |
| 2122 | |
| 2123 #ifdef _LP64 | |
| 2124 intptr_t thepc = (intptr_t) __ pc(); | |
| 2125 { | |
| 2126 address here = __ pc(); | |
| 2127 // Call the next instruction | |
| 2128 __ call(here + 8, relocInfo::none); | |
| 2129 __ delayed()->nop(); | |
| 2130 } | |
| 2131 #else | |
| 2132 intptr_t thepc = __ load_pc_address(O7, 0); | |
| 2133 #endif /* _LP64 */ | |
| 2134 | |
| 2135 // We use the same pc/oopMap repeatedly when we call out | |
| 2136 oop_maps->add_gc_map(thepc - start, map); | |
| 2137 | |
| 2138 // O7 now has the pc loaded that we will use when we finally call to native. | |
| 2139 | |
| 2140 // Save thread in L7; it crosses a bunch of VM calls below | |
| 2141 // Don't use save_thread because it smashes G2 and we merely | |
| 2142 // want to save a copy | |
| 2143 __ mov(G2_thread, L7_thread_cache); | |
| 2144 | |
| 2145 | |
| 2146 // If we create an inner frame once is plenty | |
| 2147 // when we create it we must also save G2_thread | |
| 2148 bool inner_frame_created = false; | |
| 2149 | |
| 2150 // dtrace method entry support | |
| 2151 { | |
| 2152 SkipIfEqual skip_if( | |
| 2153 masm, G3_scratch, &DTraceMethodProbes, Assembler::zero); | |
| 2154 // create inner frame | |
| 2155 __ save_frame(0); | |
| 2156 __ mov(G2_thread, L7_thread_cache); | |
| 2157 __ set_oop_constant(JNIHandles::make_local(method()), O1); | |
| 2158 __ call_VM_leaf(L7_thread_cache, | |
| 2159 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
| 2160 G2_thread, O1); | |
| 2161 __ restore(); | |
| 2162 } | |
| 2163 | |
|
610
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2164 // RedefineClasses() tracing support for obsolete method entry |
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2165 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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2166 // create inner frame |
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2167 __ save_frame(0); |
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2168 __ mov(G2_thread, L7_thread_cache); |
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2169 __ set_oop_constant(JNIHandles::make_local(method()), O1); |
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2170 __ call_VM_leaf(L7_thread_cache, |
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2171 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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2172 G2_thread, O1); |
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2173 __ restore(); |
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2174 } |
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2175 |
| 0 | 2176 // We are in the jni frame unless saved_frame is true in which case |
| 2177 // we are in one frame deeper (the "inner" frame). If we are in the | |
| 2178 // "inner" frames the args are in the Iregs and if the jni frame then | |
| 2179 // they are in the Oregs. | |
| 2180 // If we ever need to go to the VM (for locking, jvmti) then | |
| 2181 // we will always be in the "inner" frame. | |
| 2182 | |
| 2183 // Lock a synchronized method | |
| 2184 int lock_offset = -1; // Set if locked | |
| 2185 if (method->is_synchronized()) { | |
| 2186 Register Roop = O1; | |
| 2187 const Register L3_box = L3; | |
| 2188 | |
| 2189 create_inner_frame(masm, &inner_frame_created); | |
| 2190 | |
| 2191 __ ld_ptr(I1, 0, O1); | |
| 2192 Label done; | |
| 2193 | |
| 2194 lock_offset = (lock_slot_offset * VMRegImpl::stack_slot_size); | |
| 2195 __ add(FP, lock_offset+STACK_BIAS, L3_box); | |
| 2196 #ifdef ASSERT | |
| 2197 if (UseBiasedLocking) { | |
| 2198 // making the box point to itself will make it clear it went unused | |
| 2199 // but also be obviously invalid | |
| 2200 __ st_ptr(L3_box, L3_box, 0); | |
| 2201 } | |
| 2202 #endif // ASSERT | |
| 2203 // | |
| 2204 // Compiler_lock_object (Roop, Rmark, Rbox, Rscratch) -- kills Rmark, Rbox, Rscratch | |
| 2205 // | |
| 2206 __ compiler_lock_object(Roop, L1, L3_box, L2); | |
| 2207 __ br(Assembler::equal, false, Assembler::pt, done); | |
| 2208 __ delayed() -> add(FP, lock_offset+STACK_BIAS, L3_box); | |
| 2209 | |
| 2210 | |
| 2211 // None of the above fast optimizations worked so we have to get into the | |
| 2212 // slow case of monitor enter. Inline a special case of call_VM that | |
| 2213 // disallows any pending_exception. | |
| 2214 __ mov(Roop, O0); // Need oop in O0 | |
| 2215 __ mov(L3_box, O1); | |
| 2216 | |
| 2217 // Record last_Java_sp, in case the VM code releases the JVM lock. | |
| 2218 | |
| 2219 __ set_last_Java_frame(FP, I7); | |
| 2220 | |
| 2221 // do the call | |
| 2222 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_locking_C), relocInfo::runtime_call_type); | |
| 2223 __ delayed()->mov(L7_thread_cache, O2); | |
| 2224 | |
| 2225 __ restore_thread(L7_thread_cache); // restore G2_thread | |
| 2226 __ reset_last_Java_frame(); | |
| 2227 | |
| 2228 #ifdef ASSERT | |
| 2229 { Label L; | |
| 2230 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), O0); | |
| 2231 __ br_null(O0, false, Assembler::pt, L); | |
| 2232 __ delayed()->nop(); | |
| 2233 __ stop("no pending exception allowed on exit from IR::monitorenter"); | |
| 2234 __ bind(L); | |
| 2235 } | |
| 2236 #endif | |
| 2237 __ bind(done); | |
| 2238 } | |
| 2239 | |
| 2240 | |
| 2241 // Finally just about ready to make the JNI call | |
| 2242 | |
| 2243 __ flush_windows(); | |
| 2244 if (inner_frame_created) { | |
| 2245 __ restore(); | |
| 2246 } else { | |
| 2247 // Store only what we need from this frame | |
| 2248 // QQQ I think that non-v9 (like we care) we don't need these saves | |
| 2249 // either as the flush traps and the current window goes too. | |
| 2250 __ st_ptr(FP, SP, FP->sp_offset_in_saved_window()*wordSize + STACK_BIAS); | |
| 2251 __ st_ptr(I7, SP, I7->sp_offset_in_saved_window()*wordSize + STACK_BIAS); | |
| 2252 } | |
| 2253 | |
| 2254 // get JNIEnv* which is first argument to native | |
| 2255 | |
| 2256 __ add(G2_thread, in_bytes(JavaThread::jni_environment_offset()), O0); | |
| 2257 | |
| 2258 // Use that pc we placed in O7 a while back as the current frame anchor | |
| 2259 | |
| 2260 __ set_last_Java_frame(SP, O7); | |
| 2261 | |
| 2262 // Transition from _thread_in_Java to _thread_in_native. | |
| 2263 __ set(_thread_in_native, G3_scratch); | |
| 727 | 2264 __ st(G3_scratch, G2_thread, JavaThread::thread_state_offset()); |
| 0 | 2265 |
| 2266 // We flushed the windows ages ago now mark them as flushed | |
| 2267 | |
| 2268 // mark windows as flushed | |
| 2269 __ set(JavaFrameAnchor::flushed, G3_scratch); | |
| 2270 | |
| 727 | 2271 Address flags(G2_thread, JavaThread::frame_anchor_offset() + JavaFrameAnchor::flags_offset()); |
| 0 | 2272 |
| 2273 #ifdef _LP64 | |
| 727 | 2274 AddressLiteral dest(method->native_function()); |
| 0 | 2275 __ relocate(relocInfo::runtime_call_type); |
| 727 | 2276 __ jumpl_to(dest, O7, O7); |
| 0 | 2277 #else |
| 2278 __ call(method->native_function(), relocInfo::runtime_call_type); | |
| 2279 #endif | |
| 2280 __ delayed()->st(G3_scratch, flags); | |
| 2281 | |
| 2282 __ restore_thread(L7_thread_cache); // restore G2_thread | |
| 2283 | |
| 2284 // Unpack native results. For int-types, we do any needed sign-extension | |
| 2285 // and move things into I0. The return value there will survive any VM | |
| 2286 // calls for blocking or unlocking. An FP or OOP result (handle) is done | |
| 2287 // specially in the slow-path code. | |
| 2288 switch (ret_type) { | |
| 2289 case T_VOID: break; // Nothing to do! | |
| 2290 case T_FLOAT: break; // Got it where we want it (unless slow-path) | |
| 2291 case T_DOUBLE: break; // Got it where we want it (unless slow-path) | |
| 2292 // In 64 bits build result is in O0, in O0, O1 in 32bit build | |
| 2293 case T_LONG: | |
| 2294 #ifndef _LP64 | |
| 2295 __ mov(O1, I1); | |
| 2296 #endif | |
| 2297 // Fall thru | |
| 2298 case T_OBJECT: // Really a handle | |
| 2299 case T_ARRAY: | |
| 2300 case T_INT: | |
| 2301 __ mov(O0, I0); | |
| 2302 break; | |
| 2303 case T_BOOLEAN: __ subcc(G0, O0, G0); __ addc(G0, 0, I0); break; // !0 => true; 0 => false | |
| 2304 case T_BYTE : __ sll(O0, 24, O0); __ sra(O0, 24, I0); break; | |
| 2305 case T_CHAR : __ sll(O0, 16, O0); __ srl(O0, 16, I0); break; // cannot use and3, 0xFFFF too big as immediate value! | |
| 2306 case T_SHORT : __ sll(O0, 16, O0); __ sra(O0, 16, I0); break; | |
| 2307 break; // Cannot de-handlize until after reclaiming jvm_lock | |
| 2308 default: | |
| 2309 ShouldNotReachHere(); | |
| 2310 } | |
| 2311 | |
| 2312 // must we block? | |
| 2313 | |
| 2314 // Block, if necessary, before resuming in _thread_in_Java state. | |
| 2315 // In order for GC to work, don't clear the last_Java_sp until after blocking. | |
| 2316 { Label no_block; | |
| 727 | 2317 AddressLiteral sync_state(SafepointSynchronize::address_of_state()); |
| 0 | 2318 |
| 2319 // Switch thread to "native transition" state before reading the synchronization state. | |
| 2320 // This additional state is necessary because reading and testing the synchronization | |
| 2321 // state is not atomic w.r.t. GC, as this scenario demonstrates: | |
| 2322 // Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted. | |
| 2323 // VM thread changes sync state to synchronizing and suspends threads for GC. | |
| 2324 // Thread A is resumed to finish this native method, but doesn't block here since it | |
| 2325 // didn't see any synchronization is progress, and escapes. | |
| 2326 __ set(_thread_in_native_trans, G3_scratch); | |
| 727 | 2327 __ st(G3_scratch, G2_thread, JavaThread::thread_state_offset()); |
| 0 | 2328 if(os::is_MP()) { |
| 2329 if (UseMembar) { | |
| 2330 // Force this write out before the read below | |
| 2331 __ membar(Assembler::StoreLoad); | |
| 2332 } else { | |
| 2333 // Write serialization page so VM thread can do a pseudo remote membar. | |
| 2334 // We use the current thread pointer to calculate a thread specific | |
| 2335 // offset to write to within the page. This minimizes bus traffic | |
| 2336 // due to cache line collision. | |
| 2337 __ serialize_memory(G2_thread, G1_scratch, G3_scratch); | |
| 2338 } | |
| 2339 } | |
| 2340 __ load_contents(sync_state, G3_scratch); | |
| 2341 __ cmp(G3_scratch, SafepointSynchronize::_not_synchronized); | |
| 2342 | |
| 2343 Label L; | |
| 727 | 2344 Address suspend_state(G2_thread, JavaThread::suspend_flags_offset()); |
| 0 | 2345 __ br(Assembler::notEqual, false, Assembler::pn, L); |
| 727 | 2346 __ delayed()->ld(suspend_state, G3_scratch); |
| 0 | 2347 __ cmp(G3_scratch, 0); |
| 2348 __ br(Assembler::equal, false, Assembler::pt, no_block); | |
| 2349 __ delayed()->nop(); | |
| 2350 __ bind(L); | |
| 2351 | |
| 2352 // Block. Save any potential method result value before the operation and | |
| 2353 // use a leaf call to leave the last_Java_frame setup undisturbed. Doing this | |
| 2354 // lets us share the oopMap we used when we went native rather the create | |
| 2355 // a distinct one for this pc | |
| 2356 // | |
| 2357 save_native_result(masm, ret_type, stack_slots); | |
| 2358 __ call_VM_leaf(L7_thread_cache, | |
| 2359 CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans), | |
| 2360 G2_thread); | |
| 2361 | |
| 2362 // Restore any method result value | |
| 2363 restore_native_result(masm, ret_type, stack_slots); | |
| 2364 __ bind(no_block); | |
| 2365 } | |
| 2366 | |
| 2367 // thread state is thread_in_native_trans. Any safepoint blocking has already | |
| 2368 // happened so we can now change state to _thread_in_Java. | |
| 2369 | |
| 2370 | |
| 2371 __ set(_thread_in_Java, G3_scratch); | |
| 727 | 2372 __ st(G3_scratch, G2_thread, JavaThread::thread_state_offset()); |
| 0 | 2373 |
| 2374 | |
| 2375 Label no_reguard; | |
| 727 | 2376 __ ld(G2_thread, JavaThread::stack_guard_state_offset(), G3_scratch); |
| 0 | 2377 __ cmp(G3_scratch, JavaThread::stack_guard_yellow_disabled); |
| 2378 __ br(Assembler::notEqual, false, Assembler::pt, no_reguard); | |
| 2379 __ delayed()->nop(); | |
| 2380 | |
| 2381 save_native_result(masm, ret_type, stack_slots); | |
| 2382 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)); | |
| 2383 __ delayed()->nop(); | |
| 2384 | |
| 2385 __ restore_thread(L7_thread_cache); // restore G2_thread | |
| 2386 restore_native_result(masm, ret_type, stack_slots); | |
| 2387 | |
| 2388 __ bind(no_reguard); | |
| 2389 | |
| 2390 // Handle possible exception (will unlock if necessary) | |
| 2391 | |
| 2392 // native result if any is live in freg or I0 (and I1 if long and 32bit vm) | |
| 2393 | |
| 2394 // Unlock | |
| 2395 if (method->is_synchronized()) { | |
| 2396 Label done; | |
| 2397 Register I2_ex_oop = I2; | |
| 2398 const Register L3_box = L3; | |
| 2399 // Get locked oop from the handle we passed to jni | |
| 2400 __ ld_ptr(L6_handle, 0, L4); | |
| 2401 __ add(SP, lock_offset+STACK_BIAS, L3_box); | |
| 2402 // Must save pending exception around the slow-path VM call. Since it's a | |
| 2403 // leaf call, the pending exception (if any) can be kept in a register. | |
| 2404 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), I2_ex_oop); | |
| 2405 // Now unlock | |
| 2406 // (Roop, Rmark, Rbox, Rscratch) | |
| 2407 __ compiler_unlock_object(L4, L1, L3_box, L2); | |
| 2408 __ br(Assembler::equal, false, Assembler::pt, done); | |
| 2409 __ delayed()-> add(SP, lock_offset+STACK_BIAS, L3_box); | |
| 2410 | |
| 2411 // save and restore any potential method result value around the unlocking | |
| 2412 // operation. Will save in I0 (or stack for FP returns). | |
| 2413 save_native_result(masm, ret_type, stack_slots); | |
| 2414 | |
| 2415 // Must clear pending-exception before re-entering the VM. Since this is | |
| 2416 // a leaf call, pending-exception-oop can be safely kept in a register. | |
| 2417 __ st_ptr(G0, G2_thread, in_bytes(Thread::pending_exception_offset())); | |
| 2418 | |
| 2419 // slow case of monitor enter. Inline a special case of call_VM that | |
| 2420 // disallows any pending_exception. | |
| 2421 __ mov(L3_box, O1); | |
| 2422 | |
| 2423 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_unlocking_C), relocInfo::runtime_call_type); | |
| 2424 __ delayed()->mov(L4, O0); // Need oop in O0 | |
| 2425 | |
| 2426 __ restore_thread(L7_thread_cache); // restore G2_thread | |
| 2427 | |
| 2428 #ifdef ASSERT | |
| 2429 { Label L; | |
| 2430 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), O0); | |
| 2431 __ br_null(O0, false, Assembler::pt, L); | |
| 2432 __ delayed()->nop(); | |
| 2433 __ stop("no pending exception allowed on exit from IR::monitorexit"); | |
| 2434 __ bind(L); | |
| 2435 } | |
| 2436 #endif | |
| 2437 restore_native_result(masm, ret_type, stack_slots); | |
| 2438 // check_forward_pending_exception jump to forward_exception if any pending | |
| 2439 // exception is set. The forward_exception routine expects to see the | |
| 2440 // exception in pending_exception and not in a register. Kind of clumsy, | |
| 2441 // since all folks who branch to forward_exception must have tested | |
| 2442 // pending_exception first and hence have it in a register already. | |
| 2443 __ st_ptr(I2_ex_oop, G2_thread, in_bytes(Thread::pending_exception_offset())); | |
| 2444 __ bind(done); | |
| 2445 } | |
| 2446 | |
| 2447 // Tell dtrace about this method exit | |
| 2448 { | |
| 2449 SkipIfEqual skip_if( | |
| 2450 masm, G3_scratch, &DTraceMethodProbes, Assembler::zero); | |
| 2451 save_native_result(masm, ret_type, stack_slots); | |
| 2452 __ set_oop_constant(JNIHandles::make_local(method()), O1); | |
| 2453 __ call_VM_leaf(L7_thread_cache, | |
| 2454 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
| 2455 G2_thread, O1); | |
| 2456 restore_native_result(masm, ret_type, stack_slots); | |
| 2457 } | |
| 2458 | |
| 2459 // Clear "last Java frame" SP and PC. | |
| 2460 __ verify_thread(); // G2_thread must be correct | |
| 2461 __ reset_last_Java_frame(); | |
| 2462 | |
| 2463 // Unpack oop result | |
| 2464 if (ret_type == T_OBJECT || ret_type == T_ARRAY) { | |
| 2465 Label L; | |
| 2466 __ addcc(G0, I0, G0); | |
| 2467 __ brx(Assembler::notZero, true, Assembler::pt, L); | |
| 2468 __ delayed()->ld_ptr(I0, 0, I0); | |
| 2469 __ mov(G0, I0); | |
| 2470 __ bind(L); | |
| 2471 __ verify_oop(I0); | |
| 2472 } | |
| 2473 | |
| 2474 // reset handle block | |
| 2475 __ ld_ptr(G2_thread, in_bytes(JavaThread::active_handles_offset()), L5); | |
| 2476 __ st_ptr(G0, L5, JNIHandleBlock::top_offset_in_bytes()); | |
| 2477 | |
| 2478 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), G3_scratch); | |
| 2479 check_forward_pending_exception(masm, G3_scratch); | |
| 2480 | |
| 2481 | |
| 2482 // Return | |
| 2483 | |
| 2484 #ifndef _LP64 | |
| 2485 if (ret_type == T_LONG) { | |
| 2486 | |
| 2487 // Must leave proper result in O0,O1 and G1 (c2/tiered only) | |
| 2488 __ sllx(I0, 32, G1); // Shift bits into high G1 | |
| 2489 __ srl (I1, 0, I1); // Zero extend O1 (harmless?) | |
| 2490 __ or3 (I1, G1, G1); // OR 64 bits into G1 | |
| 2491 } | |
| 2492 #endif | |
| 2493 | |
| 2494 __ ret(); | |
| 2495 __ delayed()->restore(); | |
| 2496 | |
| 2497 __ flush(); | |
| 2498 | |
| 2499 nmethod *nm = nmethod::new_native_nmethod(method, | |
| 2500 masm->code(), | |
| 2501 vep_offset, | |
| 2502 frame_complete, | |
| 2503 stack_slots / VMRegImpl::slots_per_word, | |
| 2504 (is_static ? in_ByteSize(klass_offset) : in_ByteSize(receiver_offset)), | |
| 2505 in_ByteSize(lock_offset), | |
| 2506 oop_maps); | |
| 2507 return nm; | |
| 2508 | |
| 2509 } | |
| 2510 | |
|
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2511 #ifdef HAVE_DTRACE_H |
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2512 // --------------------------------------------------------------------------- |
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2513 // Generate a dtrace nmethod for a given signature. The method takes arguments |
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2514 // in the Java compiled code convention, marshals them to the native |
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2515 // abi and then leaves nops at the position you would expect to call a native |
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2516 // function. When the probe is enabled the nops are replaced with a trap |
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2517 // instruction that dtrace inserts and the trace will cause a notification |
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2518 // to dtrace. |
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2519 // |
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2520 // The probes are only able to take primitive types and java/lang/String as |
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2521 // arguments. No other java types are allowed. Strings are converted to utf8 |
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2522 // strings so that from dtrace point of view java strings are converted to C |
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2523 // strings. There is an arbitrary fixed limit on the total space that a method |
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2524 // can use for converting the strings. (256 chars per string in the signature). |
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2525 // So any java string larger then this is truncated. |
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2526 |
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2527 static int fp_offset[ConcreteRegisterImpl::number_of_registers] = { 0 }; |
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2528 static bool offsets_initialized = false; |
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2529 |
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2530 static VMRegPair reg64_to_VMRegPair(Register r) { |
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2531 VMRegPair ret; |
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2532 if (wordSize == 8) { |
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2533 ret.set2(r->as_VMReg()); |
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2534 } else { |
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2535 ret.set_pair(r->successor()->as_VMReg(), r->as_VMReg()); |
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2536 } |
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2537 return ret; |
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2538 } |
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2539 |
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2540 |
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2541 nmethod *SharedRuntime::generate_dtrace_nmethod( |
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2542 MacroAssembler *masm, methodHandle method) { |
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2543 |
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2544 |
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2545 // generate_dtrace_nmethod is guarded by a mutex so we are sure to |
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2546 // be single threaded in this method. |
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2547 assert(AdapterHandlerLibrary_lock->owned_by_self(), "must be"); |
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2548 |
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2549 // Fill in the signature array, for the calling-convention call. |
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2550 int total_args_passed = method->size_of_parameters(); |
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2551 |
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2552 BasicType* in_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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2553 VMRegPair *in_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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2554 |
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2555 // The signature we are going to use for the trap that dtrace will see |
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2556 // java/lang/String is converted. We drop "this" and any other object |
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2557 // is converted to NULL. (A one-slot java/lang/Long object reference |
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2558 // is converted to a two-slot long, which is why we double the allocation). |
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2559 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed * 2); |
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2560 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed * 2); |
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2561 |
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2562 int i=0; |
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2563 int total_strings = 0; |
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2564 int first_arg_to_pass = 0; |
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2565 int total_c_args = 0; |
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2566 |
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2567 // Skip the receiver as dtrace doesn't want to see it |
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2568 if( !method->is_static() ) { |
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2569 in_sig_bt[i++] = T_OBJECT; |
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2570 first_arg_to_pass = 1; |
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2571 } |
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2572 |
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2573 SignatureStream ss(method->signature()); |
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2574 for ( ; !ss.at_return_type(); ss.next()) { |
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2575 BasicType bt = ss.type(); |
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2576 in_sig_bt[i++] = bt; // Collect remaining bits of signature |
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2577 out_sig_bt[total_c_args++] = bt; |
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2578 if( bt == T_OBJECT) { |
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2579 symbolOop s = ss.as_symbol_or_null(); |
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2580 if (s == vmSymbols::java_lang_String()) { |
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2581 total_strings++; |
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2582 out_sig_bt[total_c_args-1] = T_ADDRESS; |
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2583 } else if (s == vmSymbols::java_lang_Boolean() || |
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2584 s == vmSymbols::java_lang_Byte()) { |
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2585 out_sig_bt[total_c_args-1] = T_BYTE; |
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2586 } else if (s == vmSymbols::java_lang_Character() || |
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2587 s == vmSymbols::java_lang_Short()) { |
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2588 out_sig_bt[total_c_args-1] = T_SHORT; |
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2589 } else if (s == vmSymbols::java_lang_Integer() || |
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2590 s == vmSymbols::java_lang_Float()) { |
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2591 out_sig_bt[total_c_args-1] = T_INT; |
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2592 } else if (s == vmSymbols::java_lang_Long() || |
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2593 s == vmSymbols::java_lang_Double()) { |
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2594 out_sig_bt[total_c_args-1] = T_LONG; |
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2595 out_sig_bt[total_c_args++] = T_VOID; |
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2596 } |
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2597 } else if ( bt == T_LONG || bt == T_DOUBLE ) { |
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2598 in_sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2599 // We convert double to long |
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2600 out_sig_bt[total_c_args-1] = T_LONG; |
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2601 out_sig_bt[total_c_args++] = T_VOID; |
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2602 } else if ( bt == T_FLOAT) { |
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2603 // We convert float to int |
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2604 out_sig_bt[total_c_args-1] = T_INT; |
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2605 } |
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2606 } |
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2607 |
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2608 assert(i==total_args_passed, "validly parsed signature"); |
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2609 |
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2610 // Now get the compiled-Java layout as input arguments |
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2611 int comp_args_on_stack; |
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2612 comp_args_on_stack = SharedRuntime::java_calling_convention( |
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2613 in_sig_bt, in_regs, total_args_passed, false); |
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2614 |
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2615 // We have received a description of where all the java arg are located |
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2616 // on entry to the wrapper. We need to convert these args to where |
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2617 // the a native (non-jni) function would expect them. To figure out |
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2618 // where they go we convert the java signature to a C signature and remove |
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2619 // T_VOID for any long/double we might have received. |
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2620 |
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2621 |
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2622 // Now figure out where the args must be stored and how much stack space |
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2623 // they require (neglecting out_preserve_stack_slots but space for storing |
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2624 // the 1st six register arguments). It's weird see int_stk_helper. |
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2625 // |
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2626 int out_arg_slots; |
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2627 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); |
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2628 |
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2629 // Calculate the total number of stack slots we will need. |
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2630 |
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2631 // First count the abi requirement plus all of the outgoing args |
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2632 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; |
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2633 |
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2634 // Plus a temp for possible converion of float/double/long register args |
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2635 |
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2636 int conversion_temp = stack_slots; |
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2637 stack_slots += 2; |
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2638 |
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2639 |
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2640 // Now space for the string(s) we must convert |
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2641 |
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2642 int string_locs = stack_slots; |
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2643 stack_slots += total_strings * |
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2644 (max_dtrace_string_size / VMRegImpl::stack_slot_size); |
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2645 |
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2646 // Ok The space we have allocated will look like: |
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2647 // |
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2648 // |
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2649 // FP-> | | |
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2650 // |---------------------| |
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2651 // | string[n] | |
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2652 // |---------------------| <- string_locs[n] |
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2653 // | string[n-1] | |
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2654 // |---------------------| <- string_locs[n-1] |
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2655 // | ... | |
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2656 // | ... | |
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2657 // |---------------------| <- string_locs[1] |
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2658 // | string[0] | |
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2659 // |---------------------| <- string_locs[0] |
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2660 // | temp | |
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2661 // |---------------------| <- conversion_temp |
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2662 // | outbound memory | |
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2663 // | based arguments | |
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2664 // | | |
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2665 // |---------------------| |
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2666 // | | |
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2667 // SP-> | out_preserved_slots | |
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2668 // |
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2669 // |
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2670 |
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2671 // Now compute actual number of stack words we need rounding to make |
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2672 // stack properly aligned. |
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2673 stack_slots = round_to(stack_slots, 4 * VMRegImpl::slots_per_word); |
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2674 |
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2675 int stack_size = stack_slots * VMRegImpl::stack_slot_size; |
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2676 |
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2677 intptr_t start = (intptr_t)__ pc(); |
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2678 |
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2679 // First thing make an ic check to see if we should even be here |
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2680 |
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2681 { |
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2682 Label L; |
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2683 const Register temp_reg = G3_scratch; |
| 727 | 2684 AddressLiteral ic_miss(SharedRuntime::get_ic_miss_stub()); |
|
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2685 __ verify_oop(O0); |
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2686 __ ld_ptr(O0, oopDesc::klass_offset_in_bytes(), temp_reg); |
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2687 __ cmp(temp_reg, G5_inline_cache_reg); |
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2688 __ brx(Assembler::equal, true, Assembler::pt, L); |
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2689 __ delayed()->nop(); |
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2690 |
| 727 | 2691 __ jump_to(ic_miss, temp_reg); |
|
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2692 __ delayed()->nop(); |
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2693 __ align(CodeEntryAlignment); |
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2694 __ bind(L); |
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2695 } |
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2696 |
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2697 int vep_offset = ((intptr_t)__ pc()) - start; |
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2698 |
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2699 |
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2700 // The instruction at the verified entry point must be 5 bytes or longer |
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2701 // because it can be patched on the fly by make_non_entrant. The stack bang |
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2702 // instruction fits that requirement. |
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2703 |
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2704 // Generate stack overflow check before creating frame |
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2705 __ generate_stack_overflow_check(stack_size); |
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2706 |
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2707 assert(((intptr_t)__ pc() - start - vep_offset) >= 5, |
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2708 "valid size for make_non_entrant"); |
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2709 |
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2710 // Generate a new frame for the wrapper. |
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2711 __ save(SP, -stack_size, SP); |
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2712 |
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2713 // Frame is now completed as far a size and linkage. |
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2714 |
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2715 int frame_complete = ((intptr_t)__ pc()) - start; |
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2716 |
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2717 #ifdef ASSERT |
|
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2718 bool reg_destroyed[RegisterImpl::number_of_registers]; |
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2719 bool freg_destroyed[FloatRegisterImpl::number_of_registers]; |
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2720 for ( int r = 0 ; r < RegisterImpl::number_of_registers ; r++ ) { |
|
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2721 reg_destroyed[r] = false; |
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2722 } |
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2723 for ( int f = 0 ; f < FloatRegisterImpl::number_of_registers ; f++ ) { |
|
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2724 freg_destroyed[f] = false; |
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2725 } |
|
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2726 |
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2727 #endif /* ASSERT */ |
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2728 |
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2729 VMRegPair zero; |
|
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2730 const Register g0 = G0; // without this we get a compiler warning (why??) |
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2731 zero.set2(g0->as_VMReg()); |
|
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2732 |
|
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2733 int c_arg, j_arg; |
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2734 |
|
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2735 Register conversion_off = noreg; |
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2736 |
|
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2737 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2738 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
|
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2739 |
|
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2740 VMRegPair src = in_regs[j_arg]; |
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2741 VMRegPair dst = out_regs[c_arg]; |
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2742 |
|
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2743 #ifdef ASSERT |
|
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2744 if (src.first()->is_Register()) { |
|
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2745 assert(!reg_destroyed[src.first()->as_Register()->encoding()], "ack!"); |
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2746 } else if (src.first()->is_FloatRegister()) { |
|
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2747 assert(!freg_destroyed[src.first()->as_FloatRegister()->encoding( |
|
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2748 FloatRegisterImpl::S)], "ack!"); |
|
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2749 } |
|
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2750 if (dst.first()->is_Register()) { |
|
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2751 reg_destroyed[dst.first()->as_Register()->encoding()] = true; |
|
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2752 } else if (dst.first()->is_FloatRegister()) { |
|
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2753 freg_destroyed[dst.first()->as_FloatRegister()->encoding( |
|
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2754 FloatRegisterImpl::S)] = true; |
|
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|
2755 } |
|
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2756 #endif /* ASSERT */ |
|
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2757 |
|
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2758 switch (in_sig_bt[j_arg]) { |
|
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2759 case T_ARRAY: |
|
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2760 case T_OBJECT: |
|
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|
2761 { |
|
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2762 if (out_sig_bt[c_arg] == T_BYTE || out_sig_bt[c_arg] == T_SHORT || |
|
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2763 out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
|
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2764 // need to unbox a one-slot value |
|
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2765 Register in_reg = L0; |
|
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2766 Register tmp = L2; |
|
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2767 if ( src.first()->is_reg() ) { |
|
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2768 in_reg = src.first()->as_Register(); |
|
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2769 } else { |
|
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2770 assert(Assembler::is_simm13(reg2offset(src.first()) + STACK_BIAS), |
|
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2771 "must be"); |
|
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|
2772 __ ld_ptr(FP, reg2offset(src.first()) + STACK_BIAS, in_reg); |
|
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|
2773 } |
|
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|
2774 // If the final destination is an acceptable register |
|
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2775 if ( dst.first()->is_reg() ) { |
|
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2776 if ( dst.is_single_phys_reg() || out_sig_bt[c_arg] != T_LONG ) { |
|
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2777 tmp = dst.first()->as_Register(); |
|
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|
2778 } |
|
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|
2779 } |
|
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|
2780 |
|
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|
2781 Label skipUnbox; |
|
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|
2782 if ( wordSize == 4 && out_sig_bt[c_arg] == T_LONG ) { |
|
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2783 __ mov(G0, tmp->successor()); |
|
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|
2784 } |
|
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|
2785 __ br_null(in_reg, true, Assembler::pn, skipUnbox); |
|
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|
2786 __ delayed()->mov(G0, tmp); |
|
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|
2787 |
|
165
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|
2788 BasicType bt = out_sig_bt[c_arg]; |
|
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|
2789 int box_offset = java_lang_boxing_object::value_offset_in_bytes(bt); |
|
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2790 switch (bt) { |
|
116
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2791 case T_BYTE: |
|
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|
2792 __ ldub(in_reg, box_offset, tmp); break; |
|
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2793 case T_SHORT: |
|
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|
2794 __ lduh(in_reg, box_offset, tmp); break; |
|
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2795 case T_INT: |
|
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|
2796 __ ld(in_reg, box_offset, tmp); break; |
|
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2797 case T_LONG: |
|
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|
2798 __ ld_long(in_reg, box_offset, tmp); break; |
|
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|
2799 default: ShouldNotReachHere(); |
|
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|
2800 } |
|
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|
2801 |
|
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|
2802 __ bind(skipUnbox); |
|
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|
2803 // If tmp wasn't final destination copy to final destination |
|
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2804 if (tmp == L2) { |
|
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|
2805 VMRegPair tmp_as_VM = reg64_to_VMRegPair(L2); |
|
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2806 if (out_sig_bt[c_arg] == T_LONG) { |
|
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|
2807 long_move(masm, tmp_as_VM, dst); |
|
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|
2808 } else { |
|
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|
2809 move32_64(masm, tmp_as_VM, out_regs[c_arg]); |
|
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|
2810 } |
|
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|
2811 } |
|
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|
2812 if (out_sig_bt[c_arg] == T_LONG) { |
|
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2813 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
|
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|
2814 ++c_arg; // move over the T_VOID to keep the loop indices in sync |
|
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|
2815 } |
|
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|
2816 } else if (out_sig_bt[c_arg] == T_ADDRESS) { |
|
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2817 Register s = |
|
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2818 src.first()->is_reg() ? src.first()->as_Register() : L2; |
|
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2819 Register d = |
|
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2820 dst.first()->is_reg() ? dst.first()->as_Register() : L2; |
|
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2821 |
|
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|
2822 // We store the oop now so that the conversion pass can reach |
|
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2823 // while in the inner frame. This will be the only store if |
|
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2824 // the oop is NULL. |
|
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2825 if (s != L2) { |
|
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2826 // src is register |
|
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2827 if (d != L2) { |
|
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2828 // dst is register |
|
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|
2829 __ mov(s, d); |
|
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|
2830 } else { |
|
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113
diff
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|
2831 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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|
2832 STACK_BIAS), "must be"); |
|
018d5b58dd4f
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kamg
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113
diff
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|
2833 __ st_ptr(s, SP, reg2offset(dst.first()) + STACK_BIAS); |
|
018d5b58dd4f
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kamg
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113
diff
changeset
|
2834 } |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2835 } else { |
|
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kamg
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113
diff
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|
2836 // src not a register |
|
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kamg
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113
diff
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|
2837 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
|
2838 STACK_BIAS), "must be"); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2839 __ ld_ptr(FP, reg2offset(src.first()) + STACK_BIAS, d); |
|
018d5b58dd4f
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kamg
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113
diff
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|
2840 if (d == L2) { |
|
018d5b58dd4f
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kamg
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113
diff
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|
2841 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
|
2842 STACK_BIAS), "must be"); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2843 __ 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
|
2844 } |
|
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 } else if (out_sig_bt[c_arg] != T_VOID) { |
|
018d5b58dd4f
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kamg
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113
diff
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|
2847 // Convert the arg to NULL |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2848 if (dst.first()->is_reg()) { |
|
018d5b58dd4f
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kamg
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113
diff
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|
2849 __ mov(G0, 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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|
2850 } else { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2851 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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|
2852 STACK_BIAS), "must be"); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
2853 __ 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
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|
2854 } |
|
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 } |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2857 break; |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2858 case T_VOID: |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2859 break; |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2860 |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2861 case T_FLOAT: |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2862 if (src.first()->is_stack()) { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2863 // Stack to stack/reg is simple |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2864 move32_64(masm, src, dst); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2865 } else { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2866 if (dst.first()->is_reg()) { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2867 // freg -> reg |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2868 int off = |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2869 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
|
2870 Register d = dst.first()->as_Register(); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2871 if (Assembler::is_simm13(off)) { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2872 __ 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
|
2873 SP, off); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2874 __ ld(SP, off, d); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2875 } else { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2876 if (conversion_off == noreg) { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2877 __ set(off, L6); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2878 conversion_off = L6; |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2879 } |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2880 __ 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
|
2881 SP, conversion_off); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2882 __ ld(SP, conversion_off , d); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2883 } |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2884 } else { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2885 // freg -> mem |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2886 int off = STACK_BIAS + reg2offset(dst.first()); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2887 if (Assembler::is_simm13(off)) { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2888 __ 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
|
2889 SP, off); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2890 } else { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2891 if (conversion_off == noreg) { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2892 __ set(off, L6); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2893 conversion_off = L6; |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2894 } |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2895 __ 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
|
2896 SP, conversion_off); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2897 } |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2898 } |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2899 } |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2900 break; |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2901 |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2902 case T_DOUBLE: |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2903 assert( j_arg + 1 < total_args_passed && |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2904 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
|
2905 out_sig_bt[c_arg+1] == T_VOID, "bad arg list"); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2906 if (src.first()->is_stack()) { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2907 // Stack to stack/reg is simple |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2908 long_move(masm, src, dst); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2909 } else { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2910 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
|
2911 |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2912 // 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
|
2913 // 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
|
2914 |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2915 if (!d->is_even() && wordSize == 4) { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2916 d = L2; |
|
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 int off = STACK_BIAS + conversion_temp * VMRegImpl::stack_slot_size; |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2919 if (Assembler::is_simm13(off)) { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2920 __ stf(FloatRegisterImpl::D, src.first()->as_FloatRegister(), |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2921 SP, off); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2922 __ ld_long(SP, off, d); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2923 } else { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2924 if (conversion_off == noreg) { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2925 __ set(off, L6); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2926 conversion_off = L6; |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2927 } |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2928 __ stf(FloatRegisterImpl::D, src.first()->as_FloatRegister(), |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2929 SP, conversion_off); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2930 __ ld_long(SP, conversion_off, d); |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2931 } |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2932 if (d == L2) { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2933 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
|
2934 } |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2935 } |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2936 break; |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2937 |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2938 case T_LONG : |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2939 // 32bit can't do a split move of something like g1 -> O0, O1 |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2940 // so use a memory temp |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2941 if (src.is_single_phys_reg() && wordSize == 4) { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2942 Register tmp = L2; |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2943 if (dst.first()->is_reg() && |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2944 (wordSize == 8 || dst.first()->as_Register()->is_even())) { |
|
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
2945 tmp = dst.first()->as_Register(); |
|
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2946 } |
|
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|
2947 |
|
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|
2948 int off = STACK_BIAS + conversion_temp * VMRegImpl::stack_slot_size; |
|
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2949 if (Assembler::is_simm13(off)) { |
|
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2950 __ stx(src.first()->as_Register(), SP, off); |
|
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2951 __ ld_long(SP, off, tmp); |
|
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2952 } else { |
|
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2953 if (conversion_off == noreg) { |
|
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2954 __ set(off, L6); |
|
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2955 conversion_off = L6; |
|
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2956 } |
|
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2957 __ stx(src.first()->as_Register(), SP, conversion_off); |
|
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2958 __ ld_long(SP, conversion_off, tmp); |
|
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|
2959 } |
|
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|
2960 |
|
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2961 if (tmp == L2) { |
|
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2962 long_move(masm, reg64_to_VMRegPair(L2), dst); |
|
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|
2963 } |
|
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|
2964 } else { |
|
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2965 long_move(masm, src, dst); |
|
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|
2966 } |
|
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|
2967 break; |
|
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|
2968 |
|
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2969 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); |
|
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|
2970 |
|
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2971 default: |
|
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2972 move32_64(masm, src, dst); |
|
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2973 } |
|
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|
2974 } |
|
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|
2975 |
|
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|
2976 |
|
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|
2977 // If we have any strings we must store any register based arg to the stack |
|
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2978 // This includes any still live xmm registers too. |
|
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|
2979 |
|
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|
2980 if (total_strings > 0 ) { |
|
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|
2981 |
|
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|
2982 // protect all the arg registers |
|
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2983 __ save_frame(0); |
|
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|
2984 __ mov(G2_thread, L7_thread_cache); |
|
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2985 const Register L2_string_off = L2; |
|
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|
2986 |
|
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|
2987 // Get first string offset |
|
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2988 __ set(string_locs * VMRegImpl::stack_slot_size, L2_string_off); |
|
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|
2989 |
|
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|
2990 for (c_arg = 0 ; c_arg < total_c_args ; c_arg++ ) { |
|
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2991 if (out_sig_bt[c_arg] == T_ADDRESS) { |
|
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|
2992 |
|
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|
2993 VMRegPair dst = out_regs[c_arg]; |
|
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2994 const Register d = dst.first()->is_reg() ? |
|
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2995 dst.first()->as_Register()->after_save() : noreg; |
|
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|
2996 |
|
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|
2997 // It's a string the oop and it was already copied to the out arg |
|
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|
2998 // position |
|
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|
2999 if (d != noreg) { |
|
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|
3000 __ mov(d, O0); |
|
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|
3001 } else { |
|
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|
3002 assert(Assembler::is_simm13(reg2offset(dst.first()) + STACK_BIAS), |
|
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|
3003 "must be"); |
|
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|
3004 __ ld_ptr(FP, reg2offset(dst.first()) + STACK_BIAS, O0); |
|
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|
3005 } |
|
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|
3006 Label skip; |
|
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|
3007 |
|
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|
3008 __ br_null(O0, false, Assembler::pn, skip); |
|
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3009 __ delayed()->add(FP, L2_string_off, O1); |
|
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|
3010 |
|
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|
3011 if (d != noreg) { |
|
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|
3012 __ mov(O1, d); |
|
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|
3013 } else { |
|
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|
3014 assert(Assembler::is_simm13(reg2offset(dst.first()) + STACK_BIAS), |
|
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|
3015 "must be"); |
|
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|
3016 __ st_ptr(O1, FP, reg2offset(dst.first()) + STACK_BIAS); |
|
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|
3017 } |
|
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|
3018 |
|
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|
3019 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::get_utf), |
|
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|
3020 relocInfo::runtime_call_type); |
|
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|
3021 __ delayed()->add(L2_string_off, max_dtrace_string_size, L2_string_off); |
|
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|
3022 |
|
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|
3023 __ bind(skip); |
|
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|
3024 |
|
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|
3025 } |
|
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113
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|
3026 |
|
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|
3027 } |
|
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|
3028 __ mov(L7_thread_cache, G2_thread); |
|
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|
3029 __ restore(); |
|
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|
3030 |
|
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|
3031 } |
|
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113
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|
3032 |
|
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|
3033 |
|
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|
3034 // Ok now we are done. Need to place the nop that dtrace wants in order to |
|
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|
3035 // patch in the trap |
|
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|
3036 |
|
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|
3037 int patch_offset = ((intptr_t)__ pc()) - start; |
|
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|
3038 |
|
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|
3039 __ nop(); |
|
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|
3040 |
|
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|
3041 |
|
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|
3042 // Return |
|
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|
3043 |
|
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|
3044 __ ret(); |
|
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|
3045 __ delayed()->restore(); |
|
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|
3046 |
|
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|
3047 __ flush(); |
|
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|
3048 |
|
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|
3049 nmethod *nm = nmethod::new_dtrace_nmethod( |
|
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|
3050 method, masm->code(), vep_offset, patch_offset, frame_complete, |
|
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|
3051 stack_slots / VMRegImpl::slots_per_word); |
|
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|
3052 return nm; |
|
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|
3053 |
|
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|
3054 } |
|
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|
3055 |
|
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|
3056 #endif // HAVE_DTRACE_H |
|
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3057 |
| 0 | 3058 // this function returns the adjust size (in number of words) to a c2i adapter |
| 3059 // activation for use during deoptimization | |
| 3060 int Deoptimization::last_frame_adjust(int callee_parameters, int callee_locals) { | |
| 3061 assert(callee_locals >= callee_parameters, | |
| 3062 "test and remove; got more parms than locals"); | |
| 3063 if (callee_locals < callee_parameters) | |
| 3064 return 0; // No adjustment for negative locals | |
| 3065 int diff = (callee_locals - callee_parameters) * Interpreter::stackElementWords(); | |
| 3066 return round_to(diff, WordsPerLong); | |
| 3067 } | |
| 3068 | |
| 3069 // "Top of Stack" slots that may be unused by the calling convention but must | |
| 3070 // otherwise be preserved. | |
| 3071 // On Intel these are not necessary and the value can be zero. | |
| 3072 // On Sparc this describes the words reserved for storing a register window | |
| 3073 // when an interrupt occurs. | |
| 3074 uint SharedRuntime::out_preserve_stack_slots() { | |
| 3075 return frame::register_save_words * VMRegImpl::slots_per_word; | |
| 3076 } | |
| 3077 | |
| 3078 static void gen_new_frame(MacroAssembler* masm, bool deopt) { | |
| 3079 // | |
| 3080 // Common out the new frame generation for deopt and uncommon trap | |
| 3081 // | |
| 3082 Register G3pcs = G3_scratch; // Array of new pcs (input) | |
| 3083 Register Oreturn0 = O0; | |
| 3084 Register Oreturn1 = O1; | |
| 3085 Register O2UnrollBlock = O2; | |
| 3086 Register O3array = O3; // Array of frame sizes (input) | |
| 3087 Register O4array_size = O4; // number of frames (input) | |
| 3088 Register O7frame_size = O7; // number of frames (input) | |
| 3089 | |
| 3090 __ ld_ptr(O3array, 0, O7frame_size); | |
| 3091 __ sub(G0, O7frame_size, O7frame_size); | |
| 3092 __ save(SP, O7frame_size, SP); | |
| 3093 __ ld_ptr(G3pcs, 0, I7); // load frame's new pc | |
| 3094 | |
| 3095 #ifdef ASSERT | |
| 3096 // make sure that the frames are aligned properly | |
| 3097 #ifndef _LP64 | |
| 3098 __ btst(wordSize*2-1, SP); | |
| 3099 __ breakpoint_trap(Assembler::notZero); | |
| 3100 #endif | |
| 3101 #endif | |
| 3102 | |
| 3103 // Deopt needs to pass some extra live values from frame to frame | |
| 3104 | |
| 3105 if (deopt) { | |
| 3106 __ mov(Oreturn0->after_save(), Oreturn0); | |
| 3107 __ mov(Oreturn1->after_save(), Oreturn1); | |
| 3108 } | |
| 3109 | |
| 3110 __ mov(O4array_size->after_save(), O4array_size); | |
| 3111 __ sub(O4array_size, 1, O4array_size); | |
| 3112 __ mov(O3array->after_save(), O3array); | |
| 3113 __ mov(O2UnrollBlock->after_save(), O2UnrollBlock); | |
| 3114 __ add(G3pcs, wordSize, G3pcs); // point to next pc value | |
| 3115 | |
| 3116 #ifdef ASSERT | |
| 3117 // trash registers to show a clear pattern in backtraces | |
| 3118 __ set(0xDEAD0000, I0); | |
| 3119 __ add(I0, 2, I1); | |
| 3120 __ add(I0, 4, I2); | |
| 3121 __ add(I0, 6, I3); | |
| 3122 __ add(I0, 8, I4); | |
| 3123 // Don't touch I5 could have valuable savedSP | |
| 3124 __ set(0xDEADBEEF, L0); | |
| 3125 __ mov(L0, L1); | |
| 3126 __ mov(L0, L2); | |
| 3127 __ mov(L0, L3); | |
| 3128 __ mov(L0, L4); | |
| 3129 __ mov(L0, L5); | |
| 3130 | |
| 3131 // trash the return value as there is nothing to return yet | |
| 3132 __ set(0xDEAD0001, O7); | |
| 3133 #endif | |
| 3134 | |
| 3135 __ mov(SP, O5_savedSP); | |
| 3136 } | |
| 3137 | |
| 3138 | |
| 3139 static void make_new_frames(MacroAssembler* masm, bool deopt) { | |
| 3140 // | |
| 3141 // loop through the UnrollBlock info and create new frames | |
| 3142 // | |
| 3143 Register G3pcs = G3_scratch; | |
| 3144 Register Oreturn0 = O0; | |
| 3145 Register Oreturn1 = O1; | |
| 3146 Register O2UnrollBlock = O2; | |
| 3147 Register O3array = O3; | |
| 3148 Register O4array_size = O4; | |
| 3149 Label loop; | |
| 3150 | |
| 3151 // Before we make new frames, check to see if stack is available. | |
| 3152 // Do this after the caller's return address is on top of stack | |
| 3153 if (UseStackBanging) { | |
| 3154 // Get total frame size for interpreted frames | |
| 727 | 3155 __ ld(O2UnrollBlock, Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes(), O4); |
| 0 | 3156 __ bang_stack_size(O4, O3, G3_scratch); |
| 3157 } | |
| 3158 | |
| 727 | 3159 __ ld(O2UnrollBlock, Deoptimization::UnrollBlock::number_of_frames_offset_in_bytes(), O4array_size); |
| 3160 __ ld_ptr(O2UnrollBlock, Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes(), G3pcs); | |
| 3161 __ ld_ptr(O2UnrollBlock, Deoptimization::UnrollBlock::frame_sizes_offset_in_bytes(), O3array); | |
| 0 | 3162 |
| 3163 // Adjust old interpreter frame to make space for new frame's extra java locals | |
| 3164 // | |
| 3165 // We capture the original sp for the transition frame only because it is needed in | |
| 3166 // order to properly calculate interpreter_sp_adjustment. Even though in real life | |
| 3167 // every interpreter frame captures a savedSP it is only needed at the transition | |
| 3168 // (fortunately). If we had to have it correct everywhere then we would need to | |
| 3169 // be told the sp_adjustment for each frame we create. If the frame size array | |
| 3170 // were to have twice the frame count entries then we could have pairs [sp_adjustment, frame_size] | |
| 3171 // for each frame we create and keep up the illusion every where. | |
| 3172 // | |
| 3173 | |
| 727 | 3174 __ ld(O2UnrollBlock, Deoptimization::UnrollBlock::caller_adjustment_offset_in_bytes(), O7); |
| 0 | 3175 __ mov(SP, O5_savedSP); // remember initial sender's original sp before adjustment |
| 3176 __ sub(SP, O7, SP); | |
| 3177 | |
| 3178 #ifdef ASSERT | |
| 3179 // make sure that there is at least one entry in the array | |
| 3180 __ tst(O4array_size); | |
| 3181 __ breakpoint_trap(Assembler::zero); | |
| 3182 #endif | |
| 3183 | |
| 3184 // Now push the new interpreter frames | |
| 3185 __ bind(loop); | |
| 3186 | |
| 3187 // allocate a new frame, filling the registers | |
| 3188 | |
| 3189 gen_new_frame(masm, deopt); // allocate an interpreter frame | |
| 3190 | |
| 3191 __ tst(O4array_size); | |
| 3192 __ br(Assembler::notZero, false, Assembler::pn, loop); | |
| 3193 __ delayed()->add(O3array, wordSize, O3array); | |
| 3194 __ ld_ptr(G3pcs, 0, O7); // load final frame new pc | |
| 3195 | |
| 3196 } | |
| 3197 | |
| 3198 //------------------------------generate_deopt_blob---------------------------- | |
| 3199 // Ought to generate an ideal graph & compile, but here's some SPARC ASM | |
| 3200 // instead. | |
| 3201 void SharedRuntime::generate_deopt_blob() { | |
| 3202 // allocate space for the code | |
| 3203 ResourceMark rm; | |
| 3204 // setup code generation tools | |
| 3205 int pad = VerifyThread ? 512 : 0;// Extra slop space for more verify code | |
| 3206 #ifdef _LP64 | |
| 3207 CodeBuffer buffer("deopt_blob", 2100+pad, 512); | |
| 3208 #else | |
| 3209 // Measured 8/7/03 at 1212 in 32bit debug build (no VerifyThread) | |
| 3210 // Measured 8/7/03 at 1396 in 32bit debug build (VerifyThread) | |
| 3211 CodeBuffer buffer("deopt_blob", 1600+pad, 512); | |
| 3212 #endif /* _LP64 */ | |
| 3213 MacroAssembler* masm = new MacroAssembler(&buffer); | |
| 3214 FloatRegister Freturn0 = F0; | |
| 3215 Register Greturn1 = G1; | |
| 3216 Register Oreturn0 = O0; | |
| 3217 Register Oreturn1 = O1; | |
| 3218 Register O2UnrollBlock = O2; | |
| 1037 | 3219 Register L0deopt_mode = L0; |
| 3220 Register G4deopt_mode = G4_scratch; | |
| 0 | 3221 int frame_size_words; |
| 727 | 3222 Address saved_Freturn0_addr(FP, -sizeof(double) + STACK_BIAS); |
| 0 | 3223 #if !defined(_LP64) && defined(COMPILER2) |
| 727 | 3224 Address saved_Greturn1_addr(FP, -sizeof(double) -sizeof(jlong) + STACK_BIAS); |
| 0 | 3225 #endif |
| 3226 Label cont; | |
| 3227 | |
| 3228 OopMapSet *oop_maps = new OopMapSet(); | |
| 3229 | |
| 3230 // | |
| 3231 // This is the entry point for code which is returning to a de-optimized | |
| 3232 // frame. | |
| 3233 // The steps taken by this frame are as follows: | |
| 3234 // - push a dummy "register_save" and save the return values (O0, O1, F0/F1, G1) | |
| 3235 // and all potentially live registers (at a pollpoint many registers can be live). | |
| 3236 // | |
| 3237 // - call the C routine: Deoptimization::fetch_unroll_info (this function | |
| 3238 // returns information about the number and size of interpreter frames | |
| 3239 // which are equivalent to the frame which is being deoptimized) | |
| 3240 // - deallocate the unpack frame, restoring only results values. Other | |
| 3241 // volatile registers will now be captured in the vframeArray as needed. | |
| 3242 // - deallocate the deoptimization frame | |
| 3243 // - in a loop using the information returned in the previous step | |
| 3244 // push new interpreter frames (take care to propagate the return | |
| 3245 // values through each new frame pushed) | |
| 3246 // - create a dummy "unpack_frame" and save the return values (O0, O1, F0) | |
| 3247 // - call the C routine: Deoptimization::unpack_frames (this function | |
| 3248 // lays out values on the interpreter frame which was just created) | |
| 3249 // - deallocate the dummy unpack_frame | |
| 3250 // - ensure that all the return values are correctly set and then do | |
| 3251 // a return to the interpreter entry point | |
| 3252 // | |
| 3253 // Refer to the following methods for more information: | |
| 3254 // - Deoptimization::fetch_unroll_info | |
| 3255 // - Deoptimization::unpack_frames | |
| 3256 | |
| 3257 OopMap* map = NULL; | |
| 3258 | |
| 3259 int start = __ offset(); | |
| 3260 | |
| 3261 // restore G2, the trampoline destroyed it | |
| 3262 __ get_thread(); | |
| 3263 | |
| 3264 // On entry we have been called by the deoptimized nmethod with a call that | |
| 3265 // replaced the original call (or safepoint polling location) so the deoptimizing | |
| 3266 // pc is now in O7. Return values are still in the expected places | |
| 3267 | |
| 3268 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
| 3269 __ ba(false, cont); | |
| 1037 | 3270 __ delayed()->mov(Deoptimization::Unpack_deopt, L0deopt_mode); |
| 0 | 3271 |
| 3272 int exception_offset = __ offset() - start; | |
| 3273 | |
| 3274 // restore G2, the trampoline destroyed it | |
| 3275 __ get_thread(); | |
| 3276 | |
| 3277 // On entry we have been jumped to by the exception handler (or exception_blob | |
| 3278 // for server). O0 contains the exception oop and O7 contains the original | |
| 3279 // exception pc. So if we push a frame here it will look to the | |
| 3280 // stack walking code (fetch_unroll_info) just like a normal call so | |
| 3281 // state will be extracted normally. | |
| 3282 | |
| 3283 // save exception oop in JavaThread and fall through into the | |
| 3284 // exception_in_tls case since they are handled in same way except | |
| 3285 // for where the pending exception is kept. | |
| 727 | 3286 __ st_ptr(Oexception, G2_thread, JavaThread::exception_oop_offset()); |
| 0 | 3287 |
| 3288 // | |
| 3289 // Vanilla deoptimization with an exception pending in exception_oop | |
| 3290 // | |
| 3291 int exception_in_tls_offset = __ offset() - start; | |
| 3292 | |
| 3293 // No need to update oop_map as each call to save_live_registers will produce identical oopmap | |
| 3294 (void) RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
| 3295 | |
| 3296 // Restore G2_thread | |
| 3297 __ get_thread(); | |
| 3298 | |
| 3299 #ifdef ASSERT | |
| 3300 { | |
| 3301 // verify that there is really an exception oop in exception_oop | |
| 3302 Label has_exception; | |
| 727 | 3303 __ ld_ptr(G2_thread, JavaThread::exception_oop_offset(), Oexception); |
| 0 | 3304 __ br_notnull(Oexception, false, Assembler::pt, has_exception); |
| 3305 __ delayed()-> nop(); | |
| 3306 __ stop("no exception in thread"); | |
| 3307 __ bind(has_exception); | |
| 3308 | |
| 3309 // verify that there is no pending exception | |
| 3310 Label no_pending_exception; | |
| 727 | 3311 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
| 0 | 3312 __ ld_ptr(exception_addr, Oexception); |
| 3313 __ br_null(Oexception, false, Assembler::pt, no_pending_exception); | |
| 3314 __ delayed()->nop(); | |
| 3315 __ stop("must not have pending exception here"); | |
| 3316 __ bind(no_pending_exception); | |
| 3317 } | |
| 3318 #endif | |
| 3319 | |
| 3320 __ ba(false, cont); | |
| 1037 | 3321 __ delayed()->mov(Deoptimization::Unpack_exception, L0deopt_mode);; |
| 0 | 3322 |
| 3323 // | |
| 3324 // Reexecute entry, similar to c2 uncommon trap | |
| 3325 // | |
| 3326 int reexecute_offset = __ offset() - start; | |
| 3327 | |
| 3328 // No need to update oop_map as each call to save_live_registers will produce identical oopmap | |
| 3329 (void) RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
| 3330 | |
| 1037 | 3331 __ mov(Deoptimization::Unpack_reexecute, L0deopt_mode); |
| 0 | 3332 |
| 3333 __ bind(cont); | |
| 3334 | |
| 3335 __ set_last_Java_frame(SP, noreg); | |
| 3336 | |
| 3337 // do the call by hand so we can get the oopmap | |
| 3338 | |
| 3339 __ mov(G2_thread, L7_thread_cache); | |
| 3340 __ call(CAST_FROM_FN_PTR(address, Deoptimization::fetch_unroll_info), relocInfo::runtime_call_type); | |
| 3341 __ delayed()->mov(G2_thread, O0); | |
| 3342 | |
| 3343 // Set an oopmap for the call site this describes all our saved volatile registers | |
| 3344 | |
| 3345 oop_maps->add_gc_map( __ offset()-start, map); | |
| 3346 | |
| 3347 __ mov(L7_thread_cache, G2_thread); | |
| 3348 | |
| 3349 __ reset_last_Java_frame(); | |
| 3350 | |
| 3351 // NOTE: we know that only O0/O1 will be reloaded by restore_result_registers | |
| 3352 // so this move will survive | |
| 3353 | |
| 1037 | 3354 __ mov(L0deopt_mode, G4deopt_mode); |
| 0 | 3355 |
| 3356 __ mov(O0, O2UnrollBlock->after_save()); | |
| 3357 | |
| 3358 RegisterSaver::restore_result_registers(masm); | |
| 3359 | |
| 3360 Label noException; | |
| 1037 | 3361 __ cmp(G4deopt_mode, Deoptimization::Unpack_exception); // Was exception pending? |
| 0 | 3362 __ br(Assembler::notEqual, false, Assembler::pt, noException); |
| 3363 __ delayed()->nop(); | |
| 3364 | |
| 3365 // Move the pending exception from exception_oop to Oexception so | |
| 3366 // the pending exception will be picked up the interpreter. | |
| 3367 __ ld_ptr(G2_thread, in_bytes(JavaThread::exception_oop_offset()), Oexception); | |
| 3368 __ st_ptr(G0, G2_thread, in_bytes(JavaThread::exception_oop_offset())); | |
| 3369 __ bind(noException); | |
| 3370 | |
| 3371 // deallocate the deoptimization frame taking care to preserve the return values | |
| 3372 __ mov(Oreturn0, Oreturn0->after_save()); | |
| 3373 __ mov(Oreturn1, Oreturn1->after_save()); | |
| 3374 __ mov(O2UnrollBlock, O2UnrollBlock->after_save()); | |
| 3375 __ restore(); | |
| 3376 | |
| 3377 // Allocate new interpreter frame(s) and possible c2i adapter frame | |
| 3378 | |
| 3379 make_new_frames(masm, true); | |
| 3380 | |
| 3381 // push a dummy "unpack_frame" taking care of float return values and | |
| 3382 // call Deoptimization::unpack_frames to have the unpacker layout | |
| 3383 // information in the interpreter frames just created and then return | |
| 3384 // to the interpreter entry point | |
| 3385 __ save(SP, -frame_size_words*wordSize, SP); | |
| 3386 __ stf(FloatRegisterImpl::D, Freturn0, saved_Freturn0_addr); | |
| 3387 #if !defined(_LP64) | |
| 3388 #if defined(COMPILER2) | |
| 3389 if (!TieredCompilation) { | |
| 3390 // 32-bit 1-register longs return longs in G1 | |
| 3391 __ stx(Greturn1, saved_Greturn1_addr); | |
| 3392 } | |
| 3393 #endif | |
| 3394 __ set_last_Java_frame(SP, noreg); | |
| 1037 | 3395 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames), G2_thread, G4deopt_mode); |
| 0 | 3396 #else |
| 3397 // LP64 uses g4 in set_last_Java_frame | |
| 1037 | 3398 __ mov(G4deopt_mode, O1); |
| 0 | 3399 __ set_last_Java_frame(SP, G0); |
| 3400 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames), G2_thread, O1); | |
| 3401 #endif | |
| 3402 __ reset_last_Java_frame(); | |
| 3403 __ ldf(FloatRegisterImpl::D, saved_Freturn0_addr, Freturn0); | |
| 3404 | |
| 3405 // In tiered we never use C2 to compile methods returning longs so | |
| 3406 // the result is where we expect it already. | |
| 3407 | |
| 3408 #if !defined(_LP64) && defined(COMPILER2) | |
| 3409 // In 32 bit, C2 returns longs in G1 so restore the saved G1 into | |
| 3410 // I0/I1 if the return value is long. In the tiered world there is | |
| 3411 // a mismatch between how C1 and C2 return longs compiles and so | |
| 3412 // currently compilation of methods which return longs is disabled | |
| 3413 // for C2 and so is this code. Eventually C1 and C2 will do the | |
| 3414 // same thing for longs in the tiered world. | |
| 3415 if (!TieredCompilation) { | |
| 3416 Label not_long; | |
| 3417 __ cmp(O0,T_LONG); | |
| 3418 __ br(Assembler::notEqual, false, Assembler::pt, not_long); | |
| 3419 __ delayed()->nop(); | |
| 3420 __ ldd(saved_Greturn1_addr,I0); | |
| 3421 __ bind(not_long); | |
| 3422 } | |
| 3423 #endif | |
| 3424 __ ret(); | |
| 3425 __ delayed()->restore(); | |
| 3426 | |
| 3427 masm->flush(); | |
| 3428 _deopt_blob = DeoptimizationBlob::create(&buffer, oop_maps, 0, exception_offset, reexecute_offset, frame_size_words); | |
| 3429 _deopt_blob->set_unpack_with_exception_in_tls_offset(exception_in_tls_offset); | |
| 3430 } | |
| 3431 | |
| 3432 #ifdef COMPILER2 | |
| 3433 | |
| 3434 //------------------------------generate_uncommon_trap_blob-------------------- | |
| 3435 // Ought to generate an ideal graph & compile, but here's some SPARC ASM | |
| 3436 // instead. | |
| 3437 void SharedRuntime::generate_uncommon_trap_blob() { | |
| 3438 // allocate space for the code | |
| 3439 ResourceMark rm; | |
| 3440 // setup code generation tools | |
| 3441 int pad = VerifyThread ? 512 : 0; | |
| 3442 #ifdef _LP64 | |
| 3443 CodeBuffer buffer("uncommon_trap_blob", 2700+pad, 512); | |
| 3444 #else | |
| 3445 // Measured 8/7/03 at 660 in 32bit debug build (no VerifyThread) | |
| 3446 // Measured 8/7/03 at 1028 in 32bit debug build (VerifyThread) | |
| 3447 CodeBuffer buffer("uncommon_trap_blob", 2000+pad, 512); | |
| 3448 #endif | |
| 3449 MacroAssembler* masm = new MacroAssembler(&buffer); | |
| 3450 Register O2UnrollBlock = O2; | |
| 3451 Register O2klass_index = O2; | |
| 3452 | |
| 3453 // | |
| 3454 // This is the entry point for all traps the compiler takes when it thinks | |
| 3455 // it cannot handle further execution of compilation code. The frame is | |
| 3456 // deoptimized in these cases and converted into interpreter frames for | |
| 3457 // execution | |
| 3458 // The steps taken by this frame are as follows: | |
| 3459 // - push a fake "unpack_frame" | |
| 3460 // - call the C routine Deoptimization::uncommon_trap (this function | |
| 3461 // packs the current compiled frame into vframe arrays and returns | |
| 3462 // information about the number and size of interpreter frames which | |
| 3463 // are equivalent to the frame which is being deoptimized) | |
| 3464 // - deallocate the "unpack_frame" | |
| 3465 // - deallocate the deoptimization frame | |
| 3466 // - in a loop using the information returned in the previous step | |
| 3467 // push interpreter frames; | |
| 3468 // - create a dummy "unpack_frame" | |
| 3469 // - call the C routine: Deoptimization::unpack_frames (this function | |
| 3470 // lays out values on the interpreter frame which was just created) | |
| 3471 // - deallocate the dummy unpack_frame | |
| 3472 // - return to the interpreter entry point | |
| 3473 // | |
| 3474 // Refer to the following methods for more information: | |
| 3475 // - Deoptimization::uncommon_trap | |
| 3476 // - Deoptimization::unpack_frame | |
| 3477 | |
| 3478 // the unloaded class index is in O0 (first parameter to this blob) | |
| 3479 | |
| 3480 // push a dummy "unpack_frame" | |
| 3481 // and call Deoptimization::uncommon_trap to pack the compiled frame into | |
| 3482 // vframe array and return the UnrollBlock information | |
| 3483 __ save_frame(0); | |
| 3484 __ set_last_Java_frame(SP, noreg); | |
| 3485 __ mov(I0, O2klass_index); | |
| 3486 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap), G2_thread, O2klass_index); | |
| 3487 __ reset_last_Java_frame(); | |
| 3488 __ mov(O0, O2UnrollBlock->after_save()); | |
| 3489 __ restore(); | |
| 3490 | |
| 3491 // deallocate the deoptimized frame taking care to preserve the return values | |
| 3492 __ mov(O2UnrollBlock, O2UnrollBlock->after_save()); | |
| 3493 __ restore(); | |
| 3494 | |
| 3495 // Allocate new interpreter frame(s) and possible c2i adapter frame | |
| 3496 | |
| 3497 make_new_frames(masm, false); | |
| 3498 | |
| 3499 // push a dummy "unpack_frame" taking care of float return values and | |
| 3500 // call Deoptimization::unpack_frames to have the unpacker layout | |
| 3501 // information in the interpreter frames just created and then return | |
| 3502 // to the interpreter entry point | |
| 3503 __ save_frame(0); | |
| 3504 __ set_last_Java_frame(SP, noreg); | |
| 3505 __ mov(Deoptimization::Unpack_uncommon_trap, O3); // indicate it is the uncommon trap case | |
| 3506 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames), G2_thread, O3); | |
| 3507 __ reset_last_Java_frame(); | |
| 3508 __ ret(); | |
| 3509 __ delayed()->restore(); | |
| 3510 | |
| 3511 masm->flush(); | |
| 3512 _uncommon_trap_blob = UncommonTrapBlob::create(&buffer, NULL, __ total_frame_size_in_bytes(0)/wordSize); | |
| 3513 } | |
| 3514 | |
| 3515 #endif // COMPILER2 | |
| 3516 | |
| 3517 //------------------------------generate_handler_blob------------------- | |
| 3518 // | |
| 3519 // Generate a special Compile2Runtime blob that saves all registers, and sets | |
| 3520 // up an OopMap. | |
| 3521 // | |
| 3522 // This blob is jumped to (via a breakpoint and the signal handler) from a | |
| 3523 // safepoint in compiled code. On entry to this blob, O7 contains the | |
| 3524 // address in the original nmethod at which we should resume normal execution. | |
| 3525 // Thus, this blob looks like a subroutine which must preserve lots of | |
| 3526 // registers and return normally. Note that O7 is never register-allocated, | |
| 3527 // so it is guaranteed to be free here. | |
| 3528 // | |
| 3529 | |
| 3530 // The hardest part of what this blob must do is to save the 64-bit %o | |
| 3531 // registers in the 32-bit build. A simple 'save' turn the %o's to %i's and | |
| 3532 // an interrupt will chop off their heads. Making space in the caller's frame | |
| 3533 // first will let us save the 64-bit %o's before save'ing, but we cannot hand | |
| 3534 // the adjusted FP off to the GC stack-crawler: this will modify the caller's | |
| 3535 // SP and mess up HIS OopMaps. So we first adjust the caller's SP, then save | |
| 3536 // the 64-bit %o's, then do a save, then fixup the caller's SP (our FP). | |
| 3537 // Tricky, tricky, tricky... | |
| 3538 | |
| 3539 static SafepointBlob* generate_handler_blob(address call_ptr, bool cause_return) { | |
| 3540 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); | |
| 3541 | |
| 3542 // allocate space for the code | |
| 3543 ResourceMark rm; | |
| 3544 // setup code generation tools | |
| 3545 // Measured 8/7/03 at 896 in 32bit debug build (no VerifyThread) | |
| 3546 // Measured 8/7/03 at 1080 in 32bit debug build (VerifyThread) | |
| 3547 // even larger with TraceJumps | |
| 3548 int pad = TraceJumps ? 512 : 0; | |
| 3549 CodeBuffer buffer("handler_blob", 1600 + pad, 512); | |
| 3550 MacroAssembler* masm = new MacroAssembler(&buffer); | |
| 3551 int frame_size_words; | |
| 3552 OopMapSet *oop_maps = new OopMapSet(); | |
| 3553 OopMap* map = NULL; | |
| 3554 | |
| 3555 int start = __ offset(); | |
| 3556 | |
| 3557 // If this causes a return before the processing, then do a "restore" | |
| 3558 if (cause_return) { | |
| 3559 __ restore(); | |
| 3560 } else { | |
| 3561 // Make it look like we were called via the poll | |
| 3562 // so that frame constructor always sees a valid return address | |
| 3563 __ ld_ptr(G2_thread, in_bytes(JavaThread::saved_exception_pc_offset()), O7); | |
| 3564 __ sub(O7, frame::pc_return_offset, O7); | |
| 3565 } | |
| 3566 | |
| 3567 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
| 3568 | |
| 3569 // setup last_Java_sp (blows G4) | |
| 3570 __ set_last_Java_frame(SP, noreg); | |
| 3571 | |
| 3572 // call into the runtime to handle illegal instructions exception | |
| 3573 // Do not use call_VM_leaf, because we need to make a GC map at this call site. | |
| 3574 __ mov(G2_thread, O0); | |
| 3575 __ save_thread(L7_thread_cache); | |
| 3576 __ call(call_ptr); | |
| 3577 __ delayed()->nop(); | |
| 3578 | |
| 3579 // Set an oopmap for the call site. | |
| 3580 // We need this not only for callee-saved registers, but also for volatile | |
| 3581 // registers that the compiler might be keeping live across a safepoint. | |
| 3582 | |
| 3583 oop_maps->add_gc_map( __ offset() - start, map); | |
| 3584 | |
| 3585 __ restore_thread(L7_thread_cache); | |
| 3586 // clear last_Java_sp | |
| 3587 __ reset_last_Java_frame(); | |
| 3588 | |
| 3589 // Check for exceptions | |
| 3590 Label pending; | |
| 3591 | |
| 3592 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), O1); | |
| 3593 __ tst(O1); | |
| 3594 __ brx(Assembler::notEqual, true, Assembler::pn, pending); | |
| 3595 __ delayed()->nop(); | |
| 3596 | |
| 3597 RegisterSaver::restore_live_registers(masm); | |
| 3598 | |
| 3599 // We are back the the original state on entry and ready to go. | |
| 3600 | |
| 3601 __ retl(); | |
| 3602 __ delayed()->nop(); | |
| 3603 | |
| 3604 // Pending exception after the safepoint | |
| 3605 | |
| 3606 __ bind(pending); | |
| 3607 | |
| 3608 RegisterSaver::restore_live_registers(masm); | |
| 3609 | |
| 3610 // We are back the the original state on entry. | |
| 3611 | |
| 3612 // Tail-call forward_exception_entry, with the issuing PC in O7, | |
| 3613 // so it looks like the original nmethod called forward_exception_entry. | |
| 3614 __ set((intptr_t)StubRoutines::forward_exception_entry(), O0); | |
| 3615 __ JMP(O0, 0); | |
| 3616 __ delayed()->nop(); | |
| 3617 | |
| 3618 // ------------- | |
| 3619 // make sure all code is generated | |
| 3620 masm->flush(); | |
| 3621 | |
| 3622 // return exception blob | |
| 3623 return SafepointBlob::create(&buffer, oop_maps, frame_size_words); | |
| 3624 } | |
| 3625 | |
| 3626 // | |
| 3627 // generate_resolve_blob - call resolution (static/virtual/opt-virtual/ic-miss | |
| 3628 // | |
| 3629 // Generate a stub that calls into vm to find out the proper destination | |
| 3630 // of a java call. All the argument registers are live at this point | |
| 3631 // but since this is generic code we don't know what they are and the caller | |
| 3632 // must do any gc of the args. | |
| 3633 // | |
| 3634 static RuntimeStub* generate_resolve_blob(address destination, const char* name) { | |
| 3635 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); | |
| 3636 | |
| 3637 // allocate space for the code | |
| 3638 ResourceMark rm; | |
| 3639 // setup code generation tools | |
| 3640 // Measured 8/7/03 at 896 in 32bit debug build (no VerifyThread) | |
| 3641 // Measured 8/7/03 at 1080 in 32bit debug build (VerifyThread) | |
| 3642 // even larger with TraceJumps | |
| 3643 int pad = TraceJumps ? 512 : 0; | |
| 3644 CodeBuffer buffer(name, 1600 + pad, 512); | |
| 3645 MacroAssembler* masm = new MacroAssembler(&buffer); | |
| 3646 int frame_size_words; | |
| 3647 OopMapSet *oop_maps = new OopMapSet(); | |
| 3648 OopMap* map = NULL; | |
| 3649 | |
| 3650 int start = __ offset(); | |
| 3651 | |
| 3652 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_words); | |
| 3653 | |
| 3654 int frame_complete = __ offset(); | |
| 3655 | |
| 3656 // setup last_Java_sp (blows G4) | |
| 3657 __ set_last_Java_frame(SP, noreg); | |
| 3658 | |
| 3659 // call into the runtime to handle illegal instructions exception | |
| 3660 // Do not use call_VM_leaf, because we need to make a GC map at this call site. | |
| 3661 __ mov(G2_thread, O0); | |
| 3662 __ save_thread(L7_thread_cache); | |
| 3663 __ call(destination, relocInfo::runtime_call_type); | |
| 3664 __ delayed()->nop(); | |
| 3665 | |
| 3666 // O0 contains the address we are going to jump to assuming no exception got installed | |
| 3667 | |
| 3668 // Set an oopmap for the call site. | |
| 3669 // We need this not only for callee-saved registers, but also for volatile | |
| 3670 // registers that the compiler might be keeping live across a safepoint. | |
| 3671 | |
| 3672 oop_maps->add_gc_map( __ offset() - start, map); | |
| 3673 | |
| 3674 __ restore_thread(L7_thread_cache); | |
| 3675 // clear last_Java_sp | |
| 3676 __ reset_last_Java_frame(); | |
| 3677 | |
| 3678 // Check for exceptions | |
| 3679 Label pending; | |
| 3680 | |
| 3681 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), O1); | |
| 3682 __ tst(O1); | |
| 3683 __ brx(Assembler::notEqual, true, Assembler::pn, pending); | |
| 3684 __ delayed()->nop(); | |
| 3685 | |
| 3686 // get the returned methodOop | |
| 3687 | |
| 3688 __ get_vm_result(G5_method); | |
| 3689 __ stx(G5_method, SP, RegisterSaver::G5_offset()+STACK_BIAS); | |
| 3690 | |
| 3691 // O0 is where we want to jump, overwrite G3 which is saved and scratch | |
| 3692 | |
| 3693 __ stx(O0, SP, RegisterSaver::G3_offset()+STACK_BIAS); | |
| 3694 | |
| 3695 RegisterSaver::restore_live_registers(masm); | |
| 3696 | |
| 3697 // We are back the the original state on entry and ready to go. | |
| 3698 | |
| 3699 __ JMP(G3, 0); | |
| 3700 __ delayed()->nop(); | |
| 3701 | |
| 3702 // Pending exception after the safepoint | |
| 3703 | |
| 3704 __ bind(pending); | |
| 3705 | |
| 3706 RegisterSaver::restore_live_registers(masm); | |
| 3707 | |
| 3708 // We are back the the original state on entry. | |
| 3709 | |
| 3710 // Tail-call forward_exception_entry, with the issuing PC in O7, | |
| 3711 // so it looks like the original nmethod called forward_exception_entry. | |
| 3712 __ set((intptr_t)StubRoutines::forward_exception_entry(), O0); | |
| 3713 __ JMP(O0, 0); | |
| 3714 __ delayed()->nop(); | |
| 3715 | |
| 3716 // ------------- | |
| 3717 // make sure all code is generated | |
| 3718 masm->flush(); | |
| 3719 | |
| 3720 // return the blob | |
| 3721 // frame_size_words or bytes?? | |
| 3722 return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_words, oop_maps, true); | |
| 3723 } | |
| 3724 | |
| 3725 void SharedRuntime::generate_stubs() { | |
| 3726 | |
| 3727 _wrong_method_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method), | |
| 3728 "wrong_method_stub"); | |
| 3729 | |
| 3730 _ic_miss_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_ic_miss), | |
| 3731 "ic_miss_stub"); | |
| 3732 | |
| 3733 _resolve_opt_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_opt_virtual_call_C), | |
| 3734 "resolve_opt_virtual_call"); | |
| 3735 | |
| 3736 _resolve_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_virtual_call_C), | |
| 3737 "resolve_virtual_call"); | |
| 3738 | |
| 3739 _resolve_static_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_static_call_C), | |
| 3740 "resolve_static_call"); | |
| 3741 | |
| 3742 _polling_page_safepoint_handler_blob = | |
| 3743 generate_handler_blob(CAST_FROM_FN_PTR(address, | |
| 3744 SafepointSynchronize::handle_polling_page_exception), false); | |
| 3745 | |
| 3746 _polling_page_return_handler_blob = | |
| 3747 generate_handler_blob(CAST_FROM_FN_PTR(address, | |
| 3748 SafepointSynchronize::handle_polling_page_exception), true); | |
| 3749 | |
| 3750 generate_deopt_blob(); | |
| 3751 | |
| 3752 #ifdef COMPILER2 | |
| 3753 generate_uncommon_trap_blob(); | |
| 3754 #endif // COMPILER2 | |
| 3755 } |