Mercurial > hg > truffle
annotate src/cpu/x86/vm/sharedRuntime_x86_64.cpp @ 614:3db67f76d308
Merge
| author | acorn |
|---|---|
| date | Thu, 05 Mar 2009 22:07:29 -0500 |
| parents | afa80fa86d22 98cb887364d3 |
| children | 7bb995fbd3c0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 2003-2008 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_x86_64.cpp.incl" | |
| 27 | |
| 28 DeoptimizationBlob *SharedRuntime::_deopt_blob; | |
| 29 #ifdef COMPILER2 | |
| 30 UncommonTrapBlob *SharedRuntime::_uncommon_trap_blob; | |
| 31 ExceptionBlob *OptoRuntime::_exception_blob; | |
| 32 #endif // COMPILER2 | |
| 33 | |
| 34 SafepointBlob *SharedRuntime::_polling_page_safepoint_handler_blob; | |
| 35 SafepointBlob *SharedRuntime::_polling_page_return_handler_blob; | |
| 36 RuntimeStub* SharedRuntime::_wrong_method_blob; | |
| 37 RuntimeStub* SharedRuntime::_ic_miss_blob; | |
| 38 RuntimeStub* SharedRuntime::_resolve_opt_virtual_call_blob; | |
| 39 RuntimeStub* SharedRuntime::_resolve_virtual_call_blob; | |
| 40 RuntimeStub* SharedRuntime::_resolve_static_call_blob; | |
| 41 | |
|
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42 const int StackAlignmentInSlots = StackAlignmentInBytes / VMRegImpl::stack_slot_size; |
|
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43 |
| 0 | 44 #define __ masm-> |
| 45 | |
| 46 class SimpleRuntimeFrame { | |
| 47 | |
| 48 public: | |
| 49 | |
| 50 // Most of the runtime stubs have this simple frame layout. | |
| 51 // This class exists to make the layout shared in one place. | |
| 52 // Offsets are for compiler stack slots, which are jints. | |
| 53 enum layout { | |
| 54 // The frame sender code expects that rbp will be in the "natural" place and | |
| 55 // will override any oopMap setting for it. We must therefore force the layout | |
| 56 // so that it agrees with the frame sender code. | |
| 57 rbp_off = frame::arg_reg_save_area_bytes/BytesPerInt, | |
| 58 rbp_off2, | |
| 59 return_off, return_off2, | |
| 60 framesize | |
| 61 }; | |
| 62 }; | |
| 63 | |
| 64 class RegisterSaver { | |
| 65 // Capture info about frame layout. Layout offsets are in jint | |
| 66 // units because compiler frame slots are jints. | |
| 67 #define DEF_XMM_OFFS(regnum) xmm ## regnum ## _off = xmm_off + (regnum)*16/BytesPerInt, xmm ## regnum ## H_off | |
| 68 enum layout { | |
| 69 fpu_state_off = frame::arg_reg_save_area_bytes/BytesPerInt, // fxsave save area | |
| 70 xmm_off = fpu_state_off + 160/BytesPerInt, // offset in fxsave save area | |
| 71 DEF_XMM_OFFS(0), | |
| 72 DEF_XMM_OFFS(1), | |
| 73 DEF_XMM_OFFS(2), | |
| 74 DEF_XMM_OFFS(3), | |
| 75 DEF_XMM_OFFS(4), | |
| 76 DEF_XMM_OFFS(5), | |
| 77 DEF_XMM_OFFS(6), | |
| 78 DEF_XMM_OFFS(7), | |
| 79 DEF_XMM_OFFS(8), | |
| 80 DEF_XMM_OFFS(9), | |
| 81 DEF_XMM_OFFS(10), | |
| 82 DEF_XMM_OFFS(11), | |
| 83 DEF_XMM_OFFS(12), | |
| 84 DEF_XMM_OFFS(13), | |
| 85 DEF_XMM_OFFS(14), | |
| 86 DEF_XMM_OFFS(15), | |
| 87 fpu_state_end = fpu_state_off + ((FPUStateSizeInWords-1)*wordSize / BytesPerInt), | |
| 88 fpu_stateH_end, | |
| 89 r15_off, r15H_off, | |
| 90 r14_off, r14H_off, | |
| 91 r13_off, r13H_off, | |
| 92 r12_off, r12H_off, | |
| 93 r11_off, r11H_off, | |
| 94 r10_off, r10H_off, | |
| 95 r9_off, r9H_off, | |
| 96 r8_off, r8H_off, | |
| 97 rdi_off, rdiH_off, | |
| 98 rsi_off, rsiH_off, | |
| 99 ignore_off, ignoreH_off, // extra copy of rbp | |
| 100 rsp_off, rspH_off, | |
| 101 rbx_off, rbxH_off, | |
| 102 rdx_off, rdxH_off, | |
| 103 rcx_off, rcxH_off, | |
| 104 rax_off, raxH_off, | |
| 105 // 16-byte stack alignment fill word: see MacroAssembler::push/pop_IU_state | |
| 106 align_off, alignH_off, | |
| 107 flags_off, flagsH_off, | |
| 108 // The frame sender code expects that rbp will be in the "natural" place and | |
| 109 // will override any oopMap setting for it. We must therefore force the layout | |
| 110 // so that it agrees with the frame sender code. | |
| 111 rbp_off, rbpH_off, // copy of rbp we will restore | |
| 112 return_off, returnH_off, // slot for return address | |
| 113 reg_save_size // size in compiler stack slots | |
| 114 }; | |
| 115 | |
| 116 public: | |
| 117 static OopMap* save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words); | |
| 118 static void restore_live_registers(MacroAssembler* masm); | |
| 119 | |
| 120 // Offsets into the register save area | |
| 121 // Used by deoptimization when it is managing result register | |
| 122 // values on its own | |
| 123 | |
| 124 static int rax_offset_in_bytes(void) { return BytesPerInt * rax_off; } | |
| 304 | 125 static int rdx_offset_in_bytes(void) { return BytesPerInt * rdx_off; } |
| 0 | 126 static int rbx_offset_in_bytes(void) { return BytesPerInt * rbx_off; } |
| 127 static int xmm0_offset_in_bytes(void) { return BytesPerInt * xmm0_off; } | |
| 128 static int return_offset_in_bytes(void) { return BytesPerInt * return_off; } | |
| 129 | |
| 130 // During deoptimization only the result registers need to be restored, | |
| 131 // all the other values have already been extracted. | |
| 132 static void restore_result_registers(MacroAssembler* masm); | |
| 133 }; | |
| 134 | |
| 135 OopMap* RegisterSaver::save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words) { | |
| 136 | |
| 137 // Always make the frame size 16-byte aligned | |
| 138 int frame_size_in_bytes = round_to(additional_frame_words*wordSize + | |
| 139 reg_save_size*BytesPerInt, 16); | |
| 140 // OopMap frame size is in compiler stack slots (jint's) not bytes or words | |
| 141 int frame_size_in_slots = frame_size_in_bytes / BytesPerInt; | |
| 142 // The caller will allocate additional_frame_words | |
| 143 int additional_frame_slots = additional_frame_words*wordSize / BytesPerInt; | |
| 144 // CodeBlob frame size is in words. | |
| 145 int frame_size_in_words = frame_size_in_bytes / wordSize; | |
| 146 *total_frame_words = frame_size_in_words; | |
| 147 | |
| 148 // Save registers, fpu state, and flags. | |
| 149 // We assume caller has already pushed the return address onto the | |
| 150 // stack, so rsp is 8-byte aligned here. | |
| 151 // We push rpb twice in this sequence because we want the real rbp | |
| 152 // to be under the return like a normal enter. | |
| 153 | |
| 154 __ enter(); // rsp becomes 16-byte aligned here | |
| 155 __ push_CPU_state(); // Push a multiple of 16 bytes | |
| 156 if (frame::arg_reg_save_area_bytes != 0) { | |
| 157 // Allocate argument register save area | |
| 304 | 158 __ subptr(rsp, frame::arg_reg_save_area_bytes); |
| 0 | 159 } |
| 160 | |
| 161 // Set an oopmap for the call site. This oopmap will map all | |
| 162 // oop-registers and debug-info registers as callee-saved. This | |
| 163 // will allow deoptimization at this safepoint to find all possible | |
| 164 // debug-info recordings, as well as let GC find all oops. | |
| 165 | |
| 166 OopMapSet *oop_maps = new OopMapSet(); | |
| 167 OopMap* map = new OopMap(frame_size_in_slots, 0); | |
| 168 map->set_callee_saved(VMRegImpl::stack2reg( rax_off + additional_frame_slots), rax->as_VMReg()); | |
| 169 map->set_callee_saved(VMRegImpl::stack2reg( rcx_off + additional_frame_slots), rcx->as_VMReg()); | |
| 170 map->set_callee_saved(VMRegImpl::stack2reg( rdx_off + additional_frame_slots), rdx->as_VMReg()); | |
| 171 map->set_callee_saved(VMRegImpl::stack2reg( rbx_off + additional_frame_slots), rbx->as_VMReg()); | |
| 172 // rbp location is known implicitly by the frame sender code, needs no oopmap | |
| 173 // and the location where rbp was saved by is ignored | |
| 174 map->set_callee_saved(VMRegImpl::stack2reg( rsi_off + additional_frame_slots), rsi->as_VMReg()); | |
| 175 map->set_callee_saved(VMRegImpl::stack2reg( rdi_off + additional_frame_slots), rdi->as_VMReg()); | |
| 176 map->set_callee_saved(VMRegImpl::stack2reg( r8_off + additional_frame_slots), r8->as_VMReg()); | |
| 177 map->set_callee_saved(VMRegImpl::stack2reg( r9_off + additional_frame_slots), r9->as_VMReg()); | |
| 178 map->set_callee_saved(VMRegImpl::stack2reg( r10_off + additional_frame_slots), r10->as_VMReg()); | |
| 179 map->set_callee_saved(VMRegImpl::stack2reg( r11_off + additional_frame_slots), r11->as_VMReg()); | |
| 180 map->set_callee_saved(VMRegImpl::stack2reg( r12_off + additional_frame_slots), r12->as_VMReg()); | |
| 181 map->set_callee_saved(VMRegImpl::stack2reg( r13_off + additional_frame_slots), r13->as_VMReg()); | |
| 182 map->set_callee_saved(VMRegImpl::stack2reg( r14_off + additional_frame_slots), r14->as_VMReg()); | |
| 183 map->set_callee_saved(VMRegImpl::stack2reg( r15_off + additional_frame_slots), r15->as_VMReg()); | |
| 184 map->set_callee_saved(VMRegImpl::stack2reg(xmm0_off + additional_frame_slots), xmm0->as_VMReg()); | |
| 185 map->set_callee_saved(VMRegImpl::stack2reg(xmm1_off + additional_frame_slots), xmm1->as_VMReg()); | |
| 186 map->set_callee_saved(VMRegImpl::stack2reg(xmm2_off + additional_frame_slots), xmm2->as_VMReg()); | |
| 187 map->set_callee_saved(VMRegImpl::stack2reg(xmm3_off + additional_frame_slots), xmm3->as_VMReg()); | |
| 188 map->set_callee_saved(VMRegImpl::stack2reg(xmm4_off + additional_frame_slots), xmm4->as_VMReg()); | |
| 189 map->set_callee_saved(VMRegImpl::stack2reg(xmm5_off + additional_frame_slots), xmm5->as_VMReg()); | |
| 190 map->set_callee_saved(VMRegImpl::stack2reg(xmm6_off + additional_frame_slots), xmm6->as_VMReg()); | |
| 191 map->set_callee_saved(VMRegImpl::stack2reg(xmm7_off + additional_frame_slots), xmm7->as_VMReg()); | |
| 192 map->set_callee_saved(VMRegImpl::stack2reg(xmm8_off + additional_frame_slots), xmm8->as_VMReg()); | |
| 193 map->set_callee_saved(VMRegImpl::stack2reg(xmm9_off + additional_frame_slots), xmm9->as_VMReg()); | |
| 194 map->set_callee_saved(VMRegImpl::stack2reg(xmm10_off + additional_frame_slots), xmm10->as_VMReg()); | |
| 195 map->set_callee_saved(VMRegImpl::stack2reg(xmm11_off + additional_frame_slots), xmm11->as_VMReg()); | |
| 196 map->set_callee_saved(VMRegImpl::stack2reg(xmm12_off + additional_frame_slots), xmm12->as_VMReg()); | |
| 197 map->set_callee_saved(VMRegImpl::stack2reg(xmm13_off + additional_frame_slots), xmm13->as_VMReg()); | |
| 198 map->set_callee_saved(VMRegImpl::stack2reg(xmm14_off + additional_frame_slots), xmm14->as_VMReg()); | |
| 199 map->set_callee_saved(VMRegImpl::stack2reg(xmm15_off + additional_frame_slots), xmm15->as_VMReg()); | |
| 200 | |
| 201 // %%% These should all be a waste but we'll keep things as they were for now | |
| 202 if (true) { | |
| 203 map->set_callee_saved(VMRegImpl::stack2reg( raxH_off + additional_frame_slots), | |
| 204 rax->as_VMReg()->next()); | |
| 205 map->set_callee_saved(VMRegImpl::stack2reg( rcxH_off + additional_frame_slots), | |
| 206 rcx->as_VMReg()->next()); | |
| 207 map->set_callee_saved(VMRegImpl::stack2reg( rdxH_off + additional_frame_slots), | |
| 208 rdx->as_VMReg()->next()); | |
| 209 map->set_callee_saved(VMRegImpl::stack2reg( rbxH_off + additional_frame_slots), | |
| 210 rbx->as_VMReg()->next()); | |
| 211 // rbp location is known implicitly by the frame sender code, needs no oopmap | |
| 212 map->set_callee_saved(VMRegImpl::stack2reg( rsiH_off + additional_frame_slots), | |
| 213 rsi->as_VMReg()->next()); | |
| 214 map->set_callee_saved(VMRegImpl::stack2reg( rdiH_off + additional_frame_slots), | |
| 215 rdi->as_VMReg()->next()); | |
| 216 map->set_callee_saved(VMRegImpl::stack2reg( r8H_off + additional_frame_slots), | |
| 217 r8->as_VMReg()->next()); | |
| 218 map->set_callee_saved(VMRegImpl::stack2reg( r9H_off + additional_frame_slots), | |
| 219 r9->as_VMReg()->next()); | |
| 220 map->set_callee_saved(VMRegImpl::stack2reg( r10H_off + additional_frame_slots), | |
| 221 r10->as_VMReg()->next()); | |
| 222 map->set_callee_saved(VMRegImpl::stack2reg( r11H_off + additional_frame_slots), | |
| 223 r11->as_VMReg()->next()); | |
| 224 map->set_callee_saved(VMRegImpl::stack2reg( r12H_off + additional_frame_slots), | |
| 225 r12->as_VMReg()->next()); | |
| 226 map->set_callee_saved(VMRegImpl::stack2reg( r13H_off + additional_frame_slots), | |
| 227 r13->as_VMReg()->next()); | |
| 228 map->set_callee_saved(VMRegImpl::stack2reg( r14H_off + additional_frame_slots), | |
| 229 r14->as_VMReg()->next()); | |
| 230 map->set_callee_saved(VMRegImpl::stack2reg( r15H_off + additional_frame_slots), | |
| 231 r15->as_VMReg()->next()); | |
| 232 map->set_callee_saved(VMRegImpl::stack2reg(xmm0H_off + additional_frame_slots), | |
| 233 xmm0->as_VMReg()->next()); | |
| 234 map->set_callee_saved(VMRegImpl::stack2reg(xmm1H_off + additional_frame_slots), | |
| 235 xmm1->as_VMReg()->next()); | |
| 236 map->set_callee_saved(VMRegImpl::stack2reg(xmm2H_off + additional_frame_slots), | |
| 237 xmm2->as_VMReg()->next()); | |
| 238 map->set_callee_saved(VMRegImpl::stack2reg(xmm3H_off + additional_frame_slots), | |
| 239 xmm3->as_VMReg()->next()); | |
| 240 map->set_callee_saved(VMRegImpl::stack2reg(xmm4H_off + additional_frame_slots), | |
| 241 xmm4->as_VMReg()->next()); | |
| 242 map->set_callee_saved(VMRegImpl::stack2reg(xmm5H_off + additional_frame_slots), | |
| 243 xmm5->as_VMReg()->next()); | |
| 244 map->set_callee_saved(VMRegImpl::stack2reg(xmm6H_off + additional_frame_slots), | |
| 245 xmm6->as_VMReg()->next()); | |
| 246 map->set_callee_saved(VMRegImpl::stack2reg(xmm7H_off + additional_frame_slots), | |
| 247 xmm7->as_VMReg()->next()); | |
| 248 map->set_callee_saved(VMRegImpl::stack2reg(xmm8H_off + additional_frame_slots), | |
| 249 xmm8->as_VMReg()->next()); | |
| 250 map->set_callee_saved(VMRegImpl::stack2reg(xmm9H_off + additional_frame_slots), | |
| 251 xmm9->as_VMReg()->next()); | |
| 252 map->set_callee_saved(VMRegImpl::stack2reg(xmm10H_off + additional_frame_slots), | |
| 253 xmm10->as_VMReg()->next()); | |
| 254 map->set_callee_saved(VMRegImpl::stack2reg(xmm11H_off + additional_frame_slots), | |
| 255 xmm11->as_VMReg()->next()); | |
| 256 map->set_callee_saved(VMRegImpl::stack2reg(xmm12H_off + additional_frame_slots), | |
| 257 xmm12->as_VMReg()->next()); | |
| 258 map->set_callee_saved(VMRegImpl::stack2reg(xmm13H_off + additional_frame_slots), | |
| 259 xmm13->as_VMReg()->next()); | |
| 260 map->set_callee_saved(VMRegImpl::stack2reg(xmm14H_off + additional_frame_slots), | |
| 261 xmm14->as_VMReg()->next()); | |
| 262 map->set_callee_saved(VMRegImpl::stack2reg(xmm15H_off + additional_frame_slots), | |
| 263 xmm15->as_VMReg()->next()); | |
| 264 } | |
| 265 | |
| 266 return map; | |
| 267 } | |
| 268 | |
| 269 void RegisterSaver::restore_live_registers(MacroAssembler* masm) { | |
| 270 if (frame::arg_reg_save_area_bytes != 0) { | |
| 271 // Pop arg register save area | |
| 304 | 272 __ addptr(rsp, frame::arg_reg_save_area_bytes); |
| 0 | 273 } |
| 274 // Recover CPU state | |
| 275 __ pop_CPU_state(); | |
| 276 // Get the rbp described implicitly by the calling convention (no oopMap) | |
| 304 | 277 __ pop(rbp); |
| 0 | 278 } |
| 279 | |
| 280 void RegisterSaver::restore_result_registers(MacroAssembler* masm) { | |
| 281 | |
| 282 // Just restore result register. Only used by deoptimization. By | |
| 283 // now any callee save register that needs to be restored to a c2 | |
| 284 // caller of the deoptee has been extracted into the vframeArray | |
| 285 // and will be stuffed into the c2i adapter we create for later | |
| 286 // restoration so only result registers need to be restored here. | |
| 287 | |
| 288 // Restore fp result register | |
| 289 __ movdbl(xmm0, Address(rsp, xmm0_offset_in_bytes())); | |
| 290 // Restore integer result register | |
| 304 | 291 __ movptr(rax, Address(rsp, rax_offset_in_bytes())); |
| 292 __ movptr(rdx, Address(rsp, rdx_offset_in_bytes())); | |
| 293 | |
| 0 | 294 // Pop all of the register save are off the stack except the return address |
| 304 | 295 __ addptr(rsp, return_offset_in_bytes()); |
| 0 | 296 } |
| 297 | |
| 298 // The java_calling_convention describes stack locations as ideal slots on | |
| 299 // a frame with no abi restrictions. Since we must observe abi restrictions | |
| 300 // (like the placement of the register window) the slots must be biased by | |
| 301 // the following value. | |
| 302 static int reg2offset_in(VMReg r) { | |
| 303 // Account for saved rbp and return address | |
| 304 // This should really be in_preserve_stack_slots | |
| 305 return (r->reg2stack() + 4) * VMRegImpl::stack_slot_size; | |
| 306 } | |
| 307 | |
| 308 static int reg2offset_out(VMReg r) { | |
| 309 return (r->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size; | |
| 310 } | |
| 311 | |
| 312 // --------------------------------------------------------------------------- | |
| 313 // Read the array of BasicTypes from a signature, and compute where the | |
| 314 // arguments should go. Values in the VMRegPair regs array refer to 4-byte | |
| 315 // quantities. Values less than VMRegImpl::stack0 are registers, those above | |
| 316 // refer to 4-byte stack slots. All stack slots are based off of the stack pointer | |
| 317 // as framesizes are fixed. | |
| 318 // VMRegImpl::stack0 refers to the first slot 0(sp). | |
| 319 // and VMRegImpl::stack0+1 refers to the memory word 4-byes higher. Register | |
| 320 // up to RegisterImpl::number_of_registers) are the 64-bit | |
| 321 // integer registers. | |
| 322 | |
| 323 // Note: the INPUTS in sig_bt are in units of Java argument words, which are | |
| 324 // either 32-bit or 64-bit depending on the build. The OUTPUTS are in 32-bit | |
| 325 // units regardless of build. Of course for i486 there is no 64 bit build | |
| 326 | |
| 327 // The Java calling convention is a "shifted" version of the C ABI. | |
| 328 // By skipping the first C ABI register we can call non-static jni methods | |
| 329 // with small numbers of arguments without having to shuffle the arguments | |
| 330 // at all. Since we control the java ABI we ought to at least get some | |
| 331 // advantage out of it. | |
| 332 | |
| 333 int SharedRuntime::java_calling_convention(const BasicType *sig_bt, | |
| 334 VMRegPair *regs, | |
| 335 int total_args_passed, | |
| 336 int is_outgoing) { | |
| 337 | |
| 338 // Create the mapping between argument positions and | |
| 339 // registers. | |
| 340 static const Register INT_ArgReg[Argument::n_int_register_parameters_j] = { | |
| 341 j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5 | |
| 342 }; | |
| 343 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_j] = { | |
| 344 j_farg0, j_farg1, j_farg2, j_farg3, | |
| 345 j_farg4, j_farg5, j_farg6, j_farg7 | |
| 346 }; | |
| 347 | |
| 348 | |
| 349 uint int_args = 0; | |
| 350 uint fp_args = 0; | |
| 351 uint stk_args = 0; // inc by 2 each time | |
| 352 | |
| 353 for (int i = 0; i < total_args_passed; i++) { | |
| 354 switch (sig_bt[i]) { | |
| 355 case T_BOOLEAN: | |
| 356 case T_CHAR: | |
| 357 case T_BYTE: | |
| 358 case T_SHORT: | |
| 359 case T_INT: | |
| 360 if (int_args < Argument::n_int_register_parameters_j) { | |
| 361 regs[i].set1(INT_ArgReg[int_args++]->as_VMReg()); | |
| 362 } else { | |
| 363 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
| 364 stk_args += 2; | |
| 365 } | |
| 366 break; | |
| 367 case T_VOID: | |
| 368 // halves of T_LONG or T_DOUBLE | |
| 369 assert(i != 0 && (sig_bt[i - 1] == T_LONG || sig_bt[i - 1] == T_DOUBLE), "expecting half"); | |
| 370 regs[i].set_bad(); | |
| 371 break; | |
| 372 case T_LONG: | |
| 373 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
| 374 // fall through | |
| 375 case T_OBJECT: | |
| 376 case T_ARRAY: | |
| 377 case T_ADDRESS: | |
| 378 if (int_args < Argument::n_int_register_parameters_j) { | |
| 379 regs[i].set2(INT_ArgReg[int_args++]->as_VMReg()); | |
| 380 } else { | |
| 381 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
| 382 stk_args += 2; | |
| 383 } | |
| 384 break; | |
| 385 case T_FLOAT: | |
| 386 if (fp_args < Argument::n_float_register_parameters_j) { | |
| 387 regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg()); | |
| 388 } else { | |
| 389 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
| 390 stk_args += 2; | |
| 391 } | |
| 392 break; | |
| 393 case T_DOUBLE: | |
| 394 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
| 395 if (fp_args < Argument::n_float_register_parameters_j) { | |
| 396 regs[i].set2(FP_ArgReg[fp_args++]->as_VMReg()); | |
| 397 } else { | |
| 398 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
| 399 stk_args += 2; | |
| 400 } | |
| 401 break; | |
| 402 default: | |
| 403 ShouldNotReachHere(); | |
| 404 break; | |
| 405 } | |
| 406 } | |
| 407 | |
| 408 return round_to(stk_args, 2); | |
| 409 } | |
| 410 | |
| 411 // Patch the callers callsite with entry to compiled code if it exists. | |
| 412 static void patch_callers_callsite(MacroAssembler *masm) { | |
| 413 Label L; | |
| 414 __ verify_oop(rbx); | |
| 304 | 415 __ cmpptr(Address(rbx, in_bytes(methodOopDesc::code_offset())), (int32_t)NULL_WORD); |
| 0 | 416 __ jcc(Assembler::equal, L); |
| 417 | |
| 418 // Save the current stack pointer | |
| 304 | 419 __ mov(r13, rsp); |
| 0 | 420 // Schedule the branch target address early. |
| 421 // Call into the VM to patch the caller, then jump to compiled callee | |
| 422 // rax isn't live so capture return address while we easily can | |
| 304 | 423 __ movptr(rax, Address(rsp, 0)); |
| 0 | 424 |
| 425 // align stack so push_CPU_state doesn't fault | |
| 304 | 426 __ andptr(rsp, -(StackAlignmentInBytes)); |
| 0 | 427 __ push_CPU_state(); |
| 428 | |
| 429 | |
| 430 __ verify_oop(rbx); | |
| 431 // VM needs caller's callsite | |
| 432 // VM needs target method | |
| 433 // This needs to be a long call since we will relocate this adapter to | |
| 434 // the codeBuffer and it may not reach | |
| 435 | |
| 436 // Allocate argument register save area | |
| 437 if (frame::arg_reg_save_area_bytes != 0) { | |
| 304 | 438 __ subptr(rsp, frame::arg_reg_save_area_bytes); |
| 0 | 439 } |
| 304 | 440 __ mov(c_rarg0, rbx); |
| 441 __ mov(c_rarg1, rax); | |
| 0 | 442 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite))); |
| 443 | |
| 444 // De-allocate argument register save area | |
| 445 if (frame::arg_reg_save_area_bytes != 0) { | |
| 304 | 446 __ addptr(rsp, frame::arg_reg_save_area_bytes); |
| 0 | 447 } |
| 448 | |
| 449 __ pop_CPU_state(); | |
| 450 // restore sp | |
| 304 | 451 __ mov(rsp, r13); |
| 0 | 452 __ bind(L); |
| 453 } | |
| 454 | |
| 455 // Helper function to put tags in interpreter stack. | |
| 456 static void tag_stack(MacroAssembler *masm, const BasicType sig, int st_off) { | |
| 457 if (TaggedStackInterpreter) { | |
| 458 int tag_offset = st_off + Interpreter::expr_tag_offset_in_bytes(0); | |
| 459 if (sig == T_OBJECT || sig == T_ARRAY) { | |
| 304 | 460 __ movptr(Address(rsp, tag_offset), (int32_t) frame::TagReference); |
| 0 | 461 } else if (sig == T_LONG || sig == T_DOUBLE) { |
| 462 int next_tag_offset = st_off + Interpreter::expr_tag_offset_in_bytes(1); | |
| 304 | 463 __ movptr(Address(rsp, next_tag_offset), (int32_t) frame::TagValue); |
| 464 __ movptr(Address(rsp, tag_offset), (int32_t) frame::TagValue); | |
| 0 | 465 } else { |
| 304 | 466 __ movptr(Address(rsp, tag_offset), (int32_t) frame::TagValue); |
| 0 | 467 } |
| 468 } | |
| 469 } | |
| 470 | |
| 471 | |
| 472 static void gen_c2i_adapter(MacroAssembler *masm, | |
| 473 int total_args_passed, | |
| 474 int comp_args_on_stack, | |
| 475 const BasicType *sig_bt, | |
| 476 const VMRegPair *regs, | |
| 477 Label& skip_fixup) { | |
| 478 // Before we get into the guts of the C2I adapter, see if we should be here | |
| 479 // at all. We've come from compiled code and are attempting to jump to the | |
| 480 // interpreter, which means the caller made a static call to get here | |
| 481 // (vcalls always get a compiled target if there is one). Check for a | |
| 482 // compiled target. If there is one, we need to patch the caller's call. | |
| 483 patch_callers_callsite(masm); | |
| 484 | |
| 485 __ bind(skip_fixup); | |
| 486 | |
| 487 // Since all args are passed on the stack, total_args_passed * | |
| 488 // Interpreter::stackElementSize is the space we need. Plus 1 because | |
| 489 // we also account for the return address location since | |
| 490 // we store it first rather than hold it in rax across all the shuffling | |
| 491 | |
| 492 int extraspace = (total_args_passed * Interpreter::stackElementSize()) + wordSize; | |
| 493 | |
| 494 // stack is aligned, keep it that way | |
| 495 extraspace = round_to(extraspace, 2*wordSize); | |
| 496 | |
| 497 // Get return address | |
| 304 | 498 __ pop(rax); |
| 0 | 499 |
| 500 // set senderSP value | |
| 304 | 501 __ mov(r13, rsp); |
| 502 | |
| 503 __ subptr(rsp, extraspace); | |
| 0 | 504 |
| 505 // Store the return address in the expected location | |
| 304 | 506 __ movptr(Address(rsp, 0), rax); |
| 0 | 507 |
| 508 // Now write the args into the outgoing interpreter space | |
| 509 for (int i = 0; i < total_args_passed; i++) { | |
| 510 if (sig_bt[i] == T_VOID) { | |
| 511 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
| 512 continue; | |
| 513 } | |
| 514 | |
| 515 // offset to start parameters | |
| 516 int st_off = (total_args_passed - i) * Interpreter::stackElementSize() + | |
| 517 Interpreter::value_offset_in_bytes(); | |
| 518 int next_off = st_off - Interpreter::stackElementSize(); | |
| 519 | |
| 520 // Say 4 args: | |
| 521 // i st_off | |
| 522 // 0 32 T_LONG | |
| 523 // 1 24 T_VOID | |
| 524 // 2 16 T_OBJECT | |
| 525 // 3 8 T_BOOL | |
| 526 // - 0 return address | |
| 527 // | |
| 528 // However to make thing extra confusing. Because we can fit a long/double in | |
| 529 // a single slot on a 64 bt vm and it would be silly to break them up, the interpreter | |
| 530 // leaves one slot empty and only stores to a single slot. In this case the | |
| 531 // slot that is occupied is the T_VOID slot. See I said it was confusing. | |
| 532 | |
| 533 VMReg r_1 = regs[i].first(); | |
| 534 VMReg r_2 = regs[i].second(); | |
| 535 if (!r_1->is_valid()) { | |
| 536 assert(!r_2->is_valid(), ""); | |
| 537 continue; | |
| 538 } | |
| 539 if (r_1->is_stack()) { | |
| 540 // memory to memory use rax | |
| 541 int ld_off = r_1->reg2stack() * VMRegImpl::stack_slot_size + extraspace; | |
| 542 if (!r_2->is_valid()) { | |
| 543 // sign extend?? | |
| 544 __ movl(rax, Address(rsp, ld_off)); | |
| 304 | 545 __ movptr(Address(rsp, st_off), rax); |
| 0 | 546 tag_stack(masm, sig_bt[i], st_off); |
| 547 | |
| 548 } else { | |
| 549 | |
| 550 __ movq(rax, Address(rsp, ld_off)); | |
| 551 | |
| 552 // Two VMREgs|OptoRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG | |
| 553 // T_DOUBLE and T_LONG use two slots in the interpreter | |
| 554 if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
| 555 // ld_off == LSW, ld_off+wordSize == MSW | |
| 556 // st_off == MSW, next_off == LSW | |
| 557 __ movq(Address(rsp, next_off), rax); | |
| 558 #ifdef ASSERT | |
| 559 // Overwrite the unused slot with known junk | |
| 560 __ mov64(rax, CONST64(0xdeadffffdeadaaaa)); | |
| 304 | 561 __ movptr(Address(rsp, st_off), rax); |
| 0 | 562 #endif /* ASSERT */ |
| 563 tag_stack(masm, sig_bt[i], next_off); | |
| 564 } else { | |
| 565 __ movq(Address(rsp, st_off), rax); | |
| 566 tag_stack(masm, sig_bt[i], st_off); | |
| 567 } | |
| 568 } | |
| 569 } else if (r_1->is_Register()) { | |
| 570 Register r = r_1->as_Register(); | |
| 571 if (!r_2->is_valid()) { | |
| 572 // must be only an int (or less ) so move only 32bits to slot | |
| 573 // why not sign extend?? | |
| 574 __ movl(Address(rsp, st_off), r); | |
| 575 tag_stack(masm, sig_bt[i], st_off); | |
| 576 } else { | |
| 577 // Two VMREgs|OptoRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG | |
| 578 // T_DOUBLE and T_LONG use two slots in the interpreter | |
| 579 if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
| 580 // long/double in gpr | |
| 581 #ifdef ASSERT | |
| 582 // Overwrite the unused slot with known junk | |
| 583 __ mov64(rax, CONST64(0xdeadffffdeadaaab)); | |
| 304 | 584 __ movptr(Address(rsp, st_off), rax); |
| 0 | 585 #endif /* ASSERT */ |
| 586 __ movq(Address(rsp, next_off), r); | |
| 587 tag_stack(masm, sig_bt[i], next_off); | |
| 588 } else { | |
| 304 | 589 __ movptr(Address(rsp, st_off), r); |
| 0 | 590 tag_stack(masm, sig_bt[i], st_off); |
| 591 } | |
| 592 } | |
| 593 } else { | |
| 594 assert(r_1->is_XMMRegister(), ""); | |
| 595 if (!r_2->is_valid()) { | |
| 596 // only a float use just part of the slot | |
| 597 __ movflt(Address(rsp, st_off), r_1->as_XMMRegister()); | |
| 598 tag_stack(masm, sig_bt[i], st_off); | |
| 599 } else { | |
| 600 #ifdef ASSERT | |
| 601 // Overwrite the unused slot with known junk | |
| 602 __ mov64(rax, CONST64(0xdeadffffdeadaaac)); | |
| 304 | 603 __ movptr(Address(rsp, st_off), rax); |
| 0 | 604 #endif /* ASSERT */ |
| 605 __ movdbl(Address(rsp, next_off), r_1->as_XMMRegister()); | |
| 606 tag_stack(masm, sig_bt[i], next_off); | |
| 607 } | |
| 608 } | |
| 609 } | |
| 610 | |
| 611 // Schedule the branch target address early. | |
| 304 | 612 __ movptr(rcx, Address(rbx, in_bytes(methodOopDesc::interpreter_entry_offset()))); |
| 0 | 613 __ jmp(rcx); |
| 614 } | |
| 615 | |
| 616 static void gen_i2c_adapter(MacroAssembler *masm, | |
| 617 int total_args_passed, | |
| 618 int comp_args_on_stack, | |
| 619 const BasicType *sig_bt, | |
| 620 const VMRegPair *regs) { | |
| 621 | |
| 622 // | |
| 623 // We will only enter here from an interpreted frame and never from after | |
| 624 // passing thru a c2i. Azul allowed this but we do not. If we lose the | |
| 625 // race and use a c2i we will remain interpreted for the race loser(s). | |
| 626 // This removes all sorts of headaches on the x86 side and also eliminates | |
| 627 // the possibility of having c2i -> i2c -> c2i -> ... endless transitions. | |
| 628 | |
| 629 | |
| 630 // Note: r13 contains the senderSP on entry. We must preserve it since | |
| 631 // we may do a i2c -> c2i transition if we lose a race where compiled | |
| 632 // code goes non-entrant while we get args ready. | |
| 633 // In addition we use r13 to locate all the interpreter args as | |
| 634 // we must align the stack to 16 bytes on an i2c entry else we | |
| 635 // lose alignment we expect in all compiled code and register | |
| 636 // save code can segv when fxsave instructions find improperly | |
| 637 // aligned stack pointer. | |
| 638 | |
| 304 | 639 __ movptr(rax, Address(rsp, 0)); |
| 0 | 640 |
| 641 // Cut-out for having no stack args. Since up to 2 int/oop args are passed | |
| 642 // in registers, we will occasionally have no stack args. | |
| 643 int comp_words_on_stack = 0; | |
| 644 if (comp_args_on_stack) { | |
| 645 // Sig words on the stack are greater-than VMRegImpl::stack0. Those in | |
| 646 // registers are below. By subtracting stack0, we either get a negative | |
| 647 // number (all values in registers) or the maximum stack slot accessed. | |
| 648 | |
| 649 // Convert 4-byte c2 stack slots to words. | |
| 650 comp_words_on_stack = round_to(comp_args_on_stack*VMRegImpl::stack_slot_size, wordSize)>>LogBytesPerWord; | |
| 651 // Round up to miminum stack alignment, in wordSize | |
| 652 comp_words_on_stack = round_to(comp_words_on_stack, 2); | |
| 304 | 653 __ subptr(rsp, comp_words_on_stack * wordSize); |
| 0 | 654 } |
| 655 | |
| 656 | |
| 657 // Ensure compiled code always sees stack at proper alignment | |
| 304 | 658 __ andptr(rsp, -16); |
| 0 | 659 |
| 660 // push the return address and misalign the stack that youngest frame always sees | |
| 661 // as far as the placement of the call instruction | |
| 304 | 662 __ push(rax); |
| 0 | 663 |
| 664 // Will jump to the compiled code just as if compiled code was doing it. | |
| 665 // Pre-load the register-jump target early, to schedule it better. | |
| 304 | 666 __ movptr(r11, Address(rbx, in_bytes(methodOopDesc::from_compiled_offset()))); |
| 0 | 667 |
| 668 // Now generate the shuffle code. Pick up all register args and move the | |
| 669 // rest through the floating point stack top. | |
| 670 for (int i = 0; i < total_args_passed; i++) { | |
| 671 if (sig_bt[i] == T_VOID) { | |
| 672 // Longs and doubles are passed in native word order, but misaligned | |
| 673 // in the 32-bit build. | |
| 674 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
| 675 continue; | |
| 676 } | |
| 677 | |
| 678 // Pick up 0, 1 or 2 words from SP+offset. | |
| 679 | |
| 680 assert(!regs[i].second()->is_valid() || regs[i].first()->next() == regs[i].second(), | |
| 681 "scrambled load targets?"); | |
| 682 // Load in argument order going down. | |
| 683 // int ld_off = (total_args_passed + comp_words_on_stack -i)*wordSize; | |
| 684 // base ld_off on r13 (sender_sp) as the stack alignment makes offsets from rsp | |
| 685 // unpredictable | |
| 686 int ld_off = ((total_args_passed - 1) - i)*Interpreter::stackElementSize(); | |
| 687 | |
| 688 // Point to interpreter value (vs. tag) | |
| 689 int next_off = ld_off - Interpreter::stackElementSize(); | |
| 690 // | |
| 691 // | |
| 692 // | |
| 693 VMReg r_1 = regs[i].first(); | |
| 694 VMReg r_2 = regs[i].second(); | |
| 695 if (!r_1->is_valid()) { | |
| 696 assert(!r_2->is_valid(), ""); | |
| 697 continue; | |
| 698 } | |
| 699 if (r_1->is_stack()) { | |
| 700 // Convert stack slot to an SP offset (+ wordSize to account for return address ) | |
| 701 int st_off = regs[i].first()->reg2stack()*VMRegImpl::stack_slot_size + wordSize; | |
| 702 if (!r_2->is_valid()) { | |
| 703 // sign extend??? | |
| 704 __ movl(rax, Address(r13, ld_off)); | |
| 304 | 705 __ movptr(Address(rsp, st_off), rax); |
| 0 | 706 } else { |
| 707 // | |
| 708 // We are using two optoregs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE | |
| 709 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case | |
| 710 // So we must adjust where to pick up the data to match the interpreter. | |
| 711 // | |
| 712 // Interpreter local[n] == MSW, local[n+1] == LSW however locals | |
| 713 // are accessed as negative so LSW is at LOW address | |
| 714 | |
| 715 // ld_off is MSW so get LSW | |
| 716 const int offset = (sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? | |
| 717 next_off : ld_off; | |
| 718 __ movq(rax, Address(r13, offset)); | |
| 719 // st_off is LSW (i.e. reg.first()) | |
| 720 __ movq(Address(rsp, st_off), rax); | |
| 721 } | |
| 722 } else if (r_1->is_Register()) { // Register argument | |
| 723 Register r = r_1->as_Register(); | |
| 724 assert(r != rax, "must be different"); | |
| 725 if (r_2->is_valid()) { | |
| 726 // | |
| 727 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE | |
| 728 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case | |
| 729 // So we must adjust where to pick up the data to match the interpreter. | |
| 730 | |
| 731 const int offset = (sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? | |
| 732 next_off : ld_off; | |
| 733 | |
| 734 // this can be a misaligned move | |
| 735 __ movq(r, Address(r13, offset)); | |
| 736 } else { | |
| 737 // sign extend and use a full word? | |
| 738 __ movl(r, Address(r13, ld_off)); | |
| 739 } | |
| 740 } else { | |
| 741 if (!r_2->is_valid()) { | |
| 742 __ movflt(r_1->as_XMMRegister(), Address(r13, ld_off)); | |
| 743 } else { | |
| 744 __ movdbl(r_1->as_XMMRegister(), Address(r13, next_off)); | |
| 745 } | |
| 746 } | |
| 747 } | |
| 748 | |
| 749 // 6243940 We might end up in handle_wrong_method if | |
| 750 // the callee is deoptimized as we race thru here. If that | |
| 751 // happens we don't want to take a safepoint because the | |
| 752 // caller frame will look interpreted and arguments are now | |
| 753 // "compiled" so it is much better to make this transition | |
| 754 // invisible to the stack walking code. Unfortunately if | |
| 755 // we try and find the callee by normal means a safepoint | |
| 756 // is possible. So we stash the desired callee in the thread | |
| 757 // and the vm will find there should this case occur. | |
| 758 | |
| 304 | 759 __ movptr(Address(r15_thread, JavaThread::callee_target_offset()), rbx); |
| 0 | 760 |
| 761 // put methodOop where a c2i would expect should we end up there | |
| 762 // only needed becaus eof c2 resolve stubs return methodOop as a result in | |
| 763 // rax | |
| 304 | 764 __ mov(rax, rbx); |
| 0 | 765 __ jmp(r11); |
| 766 } | |
| 767 | |
| 768 // --------------------------------------------------------------- | |
| 769 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm, | |
| 770 int total_args_passed, | |
| 771 int comp_args_on_stack, | |
| 772 const BasicType *sig_bt, | |
| 773 const VMRegPair *regs) { | |
| 774 address i2c_entry = __ pc(); | |
| 775 | |
| 776 gen_i2c_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs); | |
| 777 | |
| 778 // ------------------------------------------------------------------------- | |
| 779 // Generate a C2I adapter. On entry we know rbx holds the methodOop during calls | |
| 780 // to the interpreter. The args start out packed in the compiled layout. They | |
| 781 // need to be unpacked into the interpreter layout. This will almost always | |
| 782 // require some stack space. We grow the current (compiled) stack, then repack | |
| 783 // the args. We finally end in a jump to the generic interpreter entry point. | |
| 784 // On exit from the interpreter, the interpreter will restore our SP (lest the | |
| 785 // compiled code, which relys solely on SP and not RBP, get sick). | |
| 786 | |
| 787 address c2i_unverified_entry = __ pc(); | |
| 788 Label skip_fixup; | |
| 789 Label ok; | |
| 790 | |
| 791 Register holder = rax; | |
| 792 Register receiver = j_rarg0; | |
| 793 Register temp = rbx; | |
| 794 | |
| 795 { | |
| 796 __ verify_oop(holder); | |
|
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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changeset
|
797 __ load_klass(temp, receiver); |
| 0 | 798 __ verify_oop(temp); |
| 799 | |
| 304 | 800 __ cmpptr(temp, Address(holder, compiledICHolderOopDesc::holder_klass_offset())); |
| 801 __ movptr(rbx, Address(holder, compiledICHolderOopDesc::holder_method_offset())); | |
| 0 | 802 __ jcc(Assembler::equal, ok); |
| 803 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
| 804 | |
| 805 __ bind(ok); | |
| 806 // Method might have been compiled since the call site was patched to | |
| 807 // interpreted if that is the case treat it as a miss so we can get | |
| 808 // the call site corrected. | |
| 304 | 809 __ cmpptr(Address(rbx, in_bytes(methodOopDesc::code_offset())), (int32_t)NULL_WORD); |
| 0 | 810 __ jcc(Assembler::equal, skip_fixup); |
| 811 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
| 812 } | |
| 813 | |
| 814 address c2i_entry = __ pc(); | |
| 815 | |
| 816 gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup); | |
| 817 | |
| 818 __ flush(); | |
| 819 return new AdapterHandlerEntry(i2c_entry, c2i_entry, c2i_unverified_entry); | |
| 820 } | |
| 821 | |
| 822 int SharedRuntime::c_calling_convention(const BasicType *sig_bt, | |
| 823 VMRegPair *regs, | |
| 824 int total_args_passed) { | |
| 825 // We return the amount of VMRegImpl stack slots we need to reserve for all | |
| 826 // the arguments NOT counting out_preserve_stack_slots. | |
| 827 | |
| 828 // NOTE: These arrays will have to change when c1 is ported | |
| 829 #ifdef _WIN64 | |
| 830 static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = { | |
| 831 c_rarg0, c_rarg1, c_rarg2, c_rarg3 | |
| 832 }; | |
| 833 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_c] = { | |
| 834 c_farg0, c_farg1, c_farg2, c_farg3 | |
| 835 }; | |
| 836 #else | |
| 837 static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = { | |
| 838 c_rarg0, c_rarg1, c_rarg2, c_rarg3, c_rarg4, c_rarg5 | |
| 839 }; | |
| 840 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_c] = { | |
| 841 c_farg0, c_farg1, c_farg2, c_farg3, | |
| 842 c_farg4, c_farg5, c_farg6, c_farg7 | |
| 843 }; | |
| 844 #endif // _WIN64 | |
| 845 | |
| 846 | |
| 847 uint int_args = 0; | |
| 848 uint fp_args = 0; | |
| 849 uint stk_args = 0; // inc by 2 each time | |
| 850 | |
| 851 for (int i = 0; i < total_args_passed; i++) { | |
| 852 switch (sig_bt[i]) { | |
| 853 case T_BOOLEAN: | |
| 854 case T_CHAR: | |
| 855 case T_BYTE: | |
| 856 case T_SHORT: | |
| 857 case T_INT: | |
| 858 if (int_args < Argument::n_int_register_parameters_c) { | |
| 859 regs[i].set1(INT_ArgReg[int_args++]->as_VMReg()); | |
| 860 #ifdef _WIN64 | |
| 861 fp_args++; | |
| 862 // Allocate slots for callee to stuff register args the stack. | |
| 863 stk_args += 2; | |
| 864 #endif | |
| 865 } else { | |
| 866 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
| 867 stk_args += 2; | |
| 868 } | |
| 869 break; | |
| 870 case T_LONG: | |
| 871 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
| 872 // fall through | |
| 873 case T_OBJECT: | |
| 874 case T_ARRAY: | |
| 875 case T_ADDRESS: | |
| 876 if (int_args < Argument::n_int_register_parameters_c) { | |
| 877 regs[i].set2(INT_ArgReg[int_args++]->as_VMReg()); | |
| 878 #ifdef _WIN64 | |
| 879 fp_args++; | |
| 880 stk_args += 2; | |
| 881 #endif | |
| 882 } else { | |
| 883 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
| 884 stk_args += 2; | |
| 885 } | |
| 886 break; | |
| 887 case T_FLOAT: | |
| 888 if (fp_args < Argument::n_float_register_parameters_c) { | |
| 889 regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg()); | |
| 890 #ifdef _WIN64 | |
| 891 int_args++; | |
| 892 // Allocate slots for callee to stuff register args the stack. | |
| 893 stk_args += 2; | |
| 894 #endif | |
| 895 } else { | |
| 896 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
| 897 stk_args += 2; | |
| 898 } | |
| 899 break; | |
| 900 case T_DOUBLE: | |
| 901 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
| 902 if (fp_args < Argument::n_float_register_parameters_c) { | |
| 903 regs[i].set2(FP_ArgReg[fp_args++]->as_VMReg()); | |
| 904 #ifdef _WIN64 | |
| 905 int_args++; | |
| 906 // Allocate slots for callee to stuff register args the stack. | |
| 907 stk_args += 2; | |
| 908 #endif | |
| 909 } else { | |
| 910 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
| 911 stk_args += 2; | |
| 912 } | |
| 913 break; | |
| 914 case T_VOID: // Halves of longs and doubles | |
| 915 assert(i != 0 && (sig_bt[i - 1] == T_LONG || sig_bt[i - 1] == T_DOUBLE), "expecting half"); | |
| 916 regs[i].set_bad(); | |
| 917 break; | |
| 918 default: | |
| 919 ShouldNotReachHere(); | |
| 920 break; | |
| 921 } | |
| 922 } | |
| 923 #ifdef _WIN64 | |
| 924 // windows abi requires that we always allocate enough stack space | |
| 925 // for 4 64bit registers to be stored down. | |
| 926 if (stk_args < 8) { | |
| 927 stk_args = 8; | |
| 928 } | |
| 929 #endif // _WIN64 | |
| 930 | |
| 931 return stk_args; | |
| 932 } | |
| 933 | |
| 934 // On 64 bit we will store integer like items to the stack as | |
| 935 // 64 bits items (sparc abi) even though java would only store | |
| 936 // 32bits for a parameter. On 32bit it will simply be 32 bits | |
| 937 // So this routine will do 32->32 on 32bit and 32->64 on 64bit | |
| 938 static void move32_64(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
| 939 if (src.first()->is_stack()) { | |
| 940 if (dst.first()->is_stack()) { | |
| 941 // stack to stack | |
| 942 __ movslq(rax, Address(rbp, reg2offset_in(src.first()))); | |
| 943 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
| 944 } else { | |
| 945 // stack to reg | |
| 946 __ movslq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()))); | |
| 947 } | |
| 948 } else if (dst.first()->is_stack()) { | |
| 949 // reg to stack | |
| 950 // Do we really have to sign extend??? | |
| 951 // __ movslq(src.first()->as_Register(), src.first()->as_Register()); | |
| 952 __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); | |
| 953 } else { | |
| 954 // Do we really have to sign extend??? | |
| 955 // __ movslq(dst.first()->as_Register(), src.first()->as_Register()); | |
| 956 if (dst.first() != src.first()) { | |
| 957 __ movq(dst.first()->as_Register(), src.first()->as_Register()); | |
| 958 } | |
| 959 } | |
| 960 } | |
| 961 | |
| 962 | |
| 963 // An oop arg. Must pass a handle not the oop itself | |
| 964 static void object_move(MacroAssembler* masm, | |
| 965 OopMap* map, | |
| 966 int oop_handle_offset, | |
| 967 int framesize_in_slots, | |
| 968 VMRegPair src, | |
| 969 VMRegPair dst, | |
| 970 bool is_receiver, | |
| 971 int* receiver_offset) { | |
| 972 | |
| 973 // must pass a handle. First figure out the location we use as a handle | |
| 974 | |
| 975 Register rHandle = dst.first()->is_stack() ? rax : dst.first()->as_Register(); | |
| 976 | |
| 977 // See if oop is NULL if it is we need no handle | |
| 978 | |
| 979 if (src.first()->is_stack()) { | |
| 980 | |
| 981 // Oop is already on the stack as an argument | |
| 982 int offset_in_older_frame = src.first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); | |
| 983 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + framesize_in_slots)); | |
| 984 if (is_receiver) { | |
| 985 *receiver_offset = (offset_in_older_frame + framesize_in_slots) * VMRegImpl::stack_slot_size; | |
| 986 } | |
| 987 | |
| 304 | 988 __ cmpptr(Address(rbp, reg2offset_in(src.first())), (int32_t)NULL_WORD); |
| 989 __ lea(rHandle, Address(rbp, reg2offset_in(src.first()))); | |
| 0 | 990 // conditionally move a NULL |
| 304 | 991 __ cmovptr(Assembler::equal, rHandle, Address(rbp, reg2offset_in(src.first()))); |
| 0 | 992 } else { |
| 993 | |
| 994 // Oop is in an a register we must store it to the space we reserve | |
| 995 // on the stack for oop_handles and pass a handle if oop is non-NULL | |
| 996 | |
| 997 const Register rOop = src.first()->as_Register(); | |
| 998 int oop_slot; | |
| 999 if (rOop == j_rarg0) | |
| 1000 oop_slot = 0; | |
| 1001 else if (rOop == j_rarg1) | |
| 1002 oop_slot = 1; | |
| 1003 else if (rOop == j_rarg2) | |
| 1004 oop_slot = 2; | |
| 1005 else if (rOop == j_rarg3) | |
| 1006 oop_slot = 3; | |
| 1007 else if (rOop == j_rarg4) | |
| 1008 oop_slot = 4; | |
| 1009 else { | |
| 1010 assert(rOop == j_rarg5, "wrong register"); | |
| 1011 oop_slot = 5; | |
| 1012 } | |
| 1013 | |
| 1014 oop_slot = oop_slot * VMRegImpl::slots_per_word + oop_handle_offset; | |
| 1015 int offset = oop_slot*VMRegImpl::stack_slot_size; | |
| 1016 | |
| 1017 map->set_oop(VMRegImpl::stack2reg(oop_slot)); | |
| 1018 // Store oop in handle area, may be NULL | |
| 304 | 1019 __ movptr(Address(rsp, offset), rOop); |
| 0 | 1020 if (is_receiver) { |
| 1021 *receiver_offset = offset; | |
| 1022 } | |
| 1023 | |
| 304 | 1024 __ cmpptr(rOop, (int32_t)NULL_WORD); |
| 1025 __ lea(rHandle, Address(rsp, offset)); | |
| 0 | 1026 // conditionally move a NULL from the handle area where it was just stored |
| 304 | 1027 __ cmovptr(Assembler::equal, rHandle, Address(rsp, offset)); |
| 0 | 1028 } |
| 1029 | |
| 1030 // If arg is on the stack then place it otherwise it is already in correct reg. | |
| 1031 if (dst.first()->is_stack()) { | |
| 304 | 1032 __ movptr(Address(rsp, reg2offset_out(dst.first())), rHandle); |
| 0 | 1033 } |
| 1034 } | |
| 1035 | |
| 1036 // A float arg may have to do float reg int reg conversion | |
| 1037 static void float_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
| 1038 assert(!src.second()->is_valid() && !dst.second()->is_valid(), "bad float_move"); | |
| 1039 | |
| 1040 // The calling conventions assures us that each VMregpair is either | |
| 1041 // all really one physical register or adjacent stack slots. | |
| 1042 // This greatly simplifies the cases here compared to sparc. | |
| 1043 | |
| 1044 if (src.first()->is_stack()) { | |
| 1045 if (dst.first()->is_stack()) { | |
| 1046 __ movl(rax, Address(rbp, reg2offset_in(src.first()))); | |
| 304 | 1047 __ movptr(Address(rsp, reg2offset_out(dst.first())), rax); |
| 0 | 1048 } else { |
| 1049 // stack to reg | |
| 1050 assert(dst.first()->is_XMMRegister(), "only expect xmm registers as parameters"); | |
| 1051 __ movflt(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_in(src.first()))); | |
| 1052 } | |
| 1053 } else if (dst.first()->is_stack()) { | |
| 1054 // reg to stack | |
| 1055 assert(src.first()->is_XMMRegister(), "only expect xmm registers as parameters"); | |
| 1056 __ movflt(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); | |
| 1057 } else { | |
| 1058 // reg to reg | |
| 1059 // In theory these overlap but the ordering is such that this is likely a nop | |
| 1060 if ( src.first() != dst.first()) { | |
| 1061 __ movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister()); | |
| 1062 } | |
| 1063 } | |
| 1064 } | |
| 1065 | |
| 1066 // A long move | |
| 1067 static void long_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
| 1068 | |
| 1069 // The calling conventions assures us that each VMregpair is either | |
| 1070 // all really one physical register or adjacent stack slots. | |
| 1071 // This greatly simplifies the cases here compared to sparc. | |
| 1072 | |
| 1073 if (src.is_single_phys_reg() ) { | |
| 1074 if (dst.is_single_phys_reg()) { | |
| 1075 if (dst.first() != src.first()) { | |
| 304 | 1076 __ mov(dst.first()->as_Register(), src.first()->as_Register()); |
| 0 | 1077 } |
| 1078 } else { | |
| 1079 assert(dst.is_single_reg(), "not a stack pair"); | |
| 1080 __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); | |
| 1081 } | |
| 1082 } else if (dst.is_single_phys_reg()) { | |
| 1083 assert(src.is_single_reg(), "not a stack pair"); | |
| 1084 __ movq(dst.first()->as_Register(), Address(rbp, reg2offset_out(src.first()))); | |
| 1085 } else { | |
| 1086 assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs"); | |
| 1087 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); | |
| 1088 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
| 1089 } | |
| 1090 } | |
| 1091 | |
| 1092 // A double move | |
| 1093 static void double_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
| 1094 | |
| 1095 // The calling conventions assures us that each VMregpair is either | |
| 1096 // all really one physical register or adjacent stack slots. | |
| 1097 // This greatly simplifies the cases here compared to sparc. | |
| 1098 | |
| 1099 if (src.is_single_phys_reg() ) { | |
| 1100 if (dst.is_single_phys_reg()) { | |
| 1101 // In theory these overlap but the ordering is such that this is likely a nop | |
| 1102 if ( src.first() != dst.first()) { | |
| 1103 __ movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister()); | |
| 1104 } | |
| 1105 } else { | |
| 1106 assert(dst.is_single_reg(), "not a stack pair"); | |
| 1107 __ movdbl(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); | |
| 1108 } | |
| 1109 } else if (dst.is_single_phys_reg()) { | |
| 1110 assert(src.is_single_reg(), "not a stack pair"); | |
| 1111 __ movdbl(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_out(src.first()))); | |
| 1112 } else { | |
| 1113 assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs"); | |
| 1114 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); | |
| 1115 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
| 1116 } | |
| 1117 } | |
| 1118 | |
| 1119 | |
| 1120 void SharedRuntime::save_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
| 1121 // We always ignore the frame_slots arg and just use the space just below frame pointer | |
| 1122 // which by this time is free to use | |
| 1123 switch (ret_type) { | |
| 1124 case T_FLOAT: | |
| 1125 __ movflt(Address(rbp, -wordSize), xmm0); | |
| 1126 break; | |
| 1127 case T_DOUBLE: | |
| 1128 __ movdbl(Address(rbp, -wordSize), xmm0); | |
| 1129 break; | |
| 1130 case T_VOID: break; | |
| 1131 default: { | |
| 304 | 1132 __ movptr(Address(rbp, -wordSize), rax); |
| 0 | 1133 } |
| 1134 } | |
| 1135 } | |
| 1136 | |
| 1137 void SharedRuntime::restore_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
| 1138 // We always ignore the frame_slots arg and just use the space just below frame pointer | |
| 1139 // which by this time is free to use | |
| 1140 switch (ret_type) { | |
| 1141 case T_FLOAT: | |
| 1142 __ movflt(xmm0, Address(rbp, -wordSize)); | |
| 1143 break; | |
| 1144 case T_DOUBLE: | |
| 1145 __ movdbl(xmm0, Address(rbp, -wordSize)); | |
| 1146 break; | |
| 1147 case T_VOID: break; | |
| 1148 default: { | |
| 304 | 1149 __ movptr(rax, Address(rbp, -wordSize)); |
| 0 | 1150 } |
| 1151 } | |
| 1152 } | |
| 1153 | |
| 1154 static void save_args(MacroAssembler *masm, int arg_count, int first_arg, VMRegPair *args) { | |
| 1155 for ( int i = first_arg ; i < arg_count ; i++ ) { | |
| 1156 if (args[i].first()->is_Register()) { | |
| 304 | 1157 __ push(args[i].first()->as_Register()); |
| 0 | 1158 } else if (args[i].first()->is_XMMRegister()) { |
| 304 | 1159 __ subptr(rsp, 2*wordSize); |
| 0 | 1160 __ movdbl(Address(rsp, 0), args[i].first()->as_XMMRegister()); |
| 1161 } | |
| 1162 } | |
| 1163 } | |
| 1164 | |
| 1165 static void restore_args(MacroAssembler *masm, int arg_count, int first_arg, VMRegPair *args) { | |
| 1166 for ( int i = arg_count - 1 ; i >= first_arg ; i-- ) { | |
| 1167 if (args[i].first()->is_Register()) { | |
| 304 | 1168 __ pop(args[i].first()->as_Register()); |
| 0 | 1169 } else if (args[i].first()->is_XMMRegister()) { |
| 1170 __ movdbl(args[i].first()->as_XMMRegister(), Address(rsp, 0)); | |
| 304 | 1171 __ addptr(rsp, 2*wordSize); |
| 0 | 1172 } |
| 1173 } | |
| 1174 } | |
| 1175 | |
| 1176 // --------------------------------------------------------------------------- | |
| 1177 // Generate a native wrapper for a given method. The method takes arguments | |
| 1178 // in the Java compiled code convention, marshals them to the native | |
| 1179 // convention (handlizes oops, etc), transitions to native, makes the call, | |
| 1180 // returns to java state (possibly blocking), unhandlizes any result and | |
| 1181 // returns. | |
| 1182 nmethod *SharedRuntime::generate_native_wrapper(MacroAssembler *masm, | |
| 1183 methodHandle method, | |
| 1184 int total_in_args, | |
| 1185 int comp_args_on_stack, | |
| 1186 BasicType *in_sig_bt, | |
| 1187 VMRegPair *in_regs, | |
| 1188 BasicType ret_type) { | |
| 1189 // Native nmethod wrappers never take possesion of the oop arguments. | |
| 1190 // So the caller will gc the arguments. The only thing we need an | |
| 1191 // oopMap for is if the call is static | |
| 1192 // | |
| 1193 // An OopMap for lock (and class if static) | |
| 1194 OopMapSet *oop_maps = new OopMapSet(); | |
| 1195 intptr_t start = (intptr_t)__ pc(); | |
| 1196 | |
| 1197 // We have received a description of where all the java arg are located | |
| 1198 // on entry to the wrapper. We need to convert these args to where | |
| 1199 // the jni function will expect them. To figure out where they go | |
| 1200 // we convert the java signature to a C signature by inserting | |
| 1201 // the hidden arguments as arg[0] and possibly arg[1] (static method) | |
| 1202 | |
| 1203 int total_c_args = total_in_args + 1; | |
| 1204 if (method->is_static()) { | |
| 1205 total_c_args++; | |
| 1206 } | |
| 1207 | |
| 1208 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_c_args); | |
| 1209 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_c_args); | |
| 1210 | |
| 1211 int argc = 0; | |
| 1212 out_sig_bt[argc++] = T_ADDRESS; | |
| 1213 if (method->is_static()) { | |
| 1214 out_sig_bt[argc++] = T_OBJECT; | |
| 1215 } | |
| 1216 | |
| 1217 for (int i = 0; i < total_in_args ; i++ ) { | |
| 1218 out_sig_bt[argc++] = in_sig_bt[i]; | |
| 1219 } | |
| 1220 | |
| 1221 // Now figure out where the args must be stored and how much stack space | |
| 1222 // they require. | |
| 1223 // | |
| 1224 int out_arg_slots; | |
| 1225 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); | |
| 1226 | |
| 1227 // Compute framesize for the wrapper. We need to handlize all oops in | |
| 1228 // incoming registers | |
| 1229 | |
| 1230 // Calculate the total number of stack slots we will need. | |
| 1231 | |
| 1232 // First count the abi requirement plus all of the outgoing args | |
| 1233 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; | |
| 1234 | |
| 1235 // Now the space for the inbound oop handle area | |
| 1236 | |
| 1237 int oop_handle_offset = stack_slots; | |
| 1238 stack_slots += 6*VMRegImpl::slots_per_word; | |
| 1239 | |
| 1240 // Now any space we need for handlizing a klass if static method | |
| 1241 | |
| 1242 int oop_temp_slot_offset = 0; | |
| 1243 int klass_slot_offset = 0; | |
| 1244 int klass_offset = -1; | |
| 1245 int lock_slot_offset = 0; | |
| 1246 bool is_static = false; | |
| 1247 | |
| 1248 if (method->is_static()) { | |
| 1249 klass_slot_offset = stack_slots; | |
| 1250 stack_slots += VMRegImpl::slots_per_word; | |
| 1251 klass_offset = klass_slot_offset * VMRegImpl::stack_slot_size; | |
| 1252 is_static = true; | |
| 1253 } | |
| 1254 | |
| 1255 // Plus a lock if needed | |
| 1256 | |
| 1257 if (method->is_synchronized()) { | |
| 1258 lock_slot_offset = stack_slots; | |
| 1259 stack_slots += VMRegImpl::slots_per_word; | |
| 1260 } | |
| 1261 | |
| 1262 // Now a place (+2) to save return values or temp during shuffling | |
| 1263 // + 4 for return address (which we own) and saved rbp | |
| 1264 stack_slots += 6; | |
| 1265 | |
| 1266 // Ok The space we have allocated will look like: | |
| 1267 // | |
| 1268 // | |
| 1269 // FP-> | | | |
| 1270 // |---------------------| | |
| 1271 // | 2 slots for moves | | |
| 1272 // |---------------------| | |
| 1273 // | lock box (if sync) | | |
| 1274 // |---------------------| <- lock_slot_offset | |
| 1275 // | klass (if static) | | |
| 1276 // |---------------------| <- klass_slot_offset | |
| 1277 // | oopHandle area | | |
| 1278 // |---------------------| <- oop_handle_offset (6 java arg registers) | |
| 1279 // | outbound memory | | |
| 1280 // | based arguments | | |
| 1281 // | | | |
| 1282 // |---------------------| | |
| 1283 // | | | |
| 1284 // SP-> | out_preserved_slots | | |
| 1285 // | |
| 1286 // | |
| 1287 | |
| 1288 | |
| 1289 // Now compute actual number of stack words we need rounding to make | |
| 1290 // stack properly aligned. | |
|
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1291 stack_slots = round_to(stack_slots, StackAlignmentInSlots); |
| 0 | 1292 |
| 1293 int stack_size = stack_slots * VMRegImpl::stack_slot_size; | |
| 1294 | |
| 1295 | |
| 1296 // First thing make an ic check to see if we should even be here | |
| 1297 | |
| 1298 // We are free to use all registers as temps without saving them and | |
| 1299 // restoring them except rbp. rbp is the only callee save register | |
| 1300 // as far as the interpreter and the compiler(s) are concerned. | |
| 1301 | |
| 1302 | |
| 1303 const Register ic_reg = rax; | |
| 1304 const Register receiver = j_rarg0; | |
|
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1305 const Register tmp = rdx; |
| 0 | 1306 |
| 1307 Label ok; | |
| 1308 Label exception_pending; | |
| 1309 | |
| 1310 __ verify_oop(receiver); | |
| 304 | 1311 __ push(tmp); // spill (any other registers free here???) |
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1312 __ load_klass(tmp, receiver); |
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1313 __ cmpq(ic_reg, tmp); |
| 0 | 1314 __ jcc(Assembler::equal, ok); |
| 1315 | |
| 304 | 1316 __ pop(tmp); |
| 0 | 1317 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); |
| 1318 | |
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1319 __ bind(ok); |
| 304 | 1320 __ pop(tmp); |
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1321 |
| 0 | 1322 // Verified entry point must be aligned |
| 1323 __ align(8); | |
| 1324 | |
| 1325 int vep_offset = ((intptr_t)__ pc()) - start; | |
| 1326 | |
| 1327 // The instruction at the verified entry point must be 5 bytes or longer | |
| 1328 // because it can be patched on the fly by make_non_entrant. The stack bang | |
| 1329 // instruction fits that requirement. | |
| 1330 | |
| 1331 // Generate stack overflow check | |
| 1332 | |
| 1333 if (UseStackBanging) { | |
| 1334 __ bang_stack_with_offset(StackShadowPages*os::vm_page_size()); | |
| 1335 } else { | |
| 1336 // need a 5 byte instruction to allow MT safe patching to non-entrant | |
| 1337 __ fat_nop(); | |
| 1338 } | |
| 1339 | |
| 1340 // Generate a new frame for the wrapper. | |
| 1341 __ enter(); | |
| 1342 // -2 because return address is already present and so is saved rbp | |
| 304 | 1343 __ subptr(rsp, stack_size - 2*wordSize); |
| 0 | 1344 |
| 1345 // Frame is now completed as far as size and linkage. | |
| 1346 | |
| 1347 int frame_complete = ((intptr_t)__ pc()) - start; | |
| 1348 | |
| 1349 #ifdef ASSERT | |
| 1350 { | |
| 1351 Label L; | |
| 304 | 1352 __ mov(rax, rsp); |
| 605 | 1353 __ andptr(rax, -16); // must be 16 byte boundary (see amd64 ABI) |
| 304 | 1354 __ cmpptr(rax, rsp); |
| 0 | 1355 __ jcc(Assembler::equal, L); |
| 1356 __ stop("improperly aligned stack"); | |
| 1357 __ bind(L); | |
| 1358 } | |
| 1359 #endif /* ASSERT */ | |
| 1360 | |
| 1361 | |
| 1362 // We use r14 as the oop handle for the receiver/klass | |
| 1363 // It is callee save so it survives the call to native | |
| 1364 | |
| 1365 const Register oop_handle_reg = r14; | |
| 1366 | |
| 1367 | |
| 1368 | |
| 1369 // | |
| 1370 // We immediately shuffle the arguments so that any vm call we have to | |
| 1371 // make from here on out (sync slow path, jvmti, etc.) we will have | |
| 1372 // captured the oops from our caller and have a valid oopMap for | |
| 1373 // them. | |
| 1374 | |
| 1375 // ----------------- | |
| 1376 // The Grand Shuffle | |
| 1377 | |
| 1378 // The Java calling convention is either equal (linux) or denser (win64) than the | |
| 1379 // c calling convention. However the because of the jni_env argument the c calling | |
| 1380 // convention always has at least one more (and two for static) arguments than Java. | |
| 1381 // Therefore if we move the args from java -> c backwards then we will never have | |
| 1382 // a register->register conflict and we don't have to build a dependency graph | |
| 1383 // and figure out how to break any cycles. | |
| 1384 // | |
| 1385 | |
| 1386 // Record esp-based slot for receiver on stack for non-static methods | |
| 1387 int receiver_offset = -1; | |
| 1388 | |
| 1389 // This is a trick. We double the stack slots so we can claim | |
| 1390 // the oops in the caller's frame. Since we are sure to have | |
| 1391 // more args than the caller doubling is enough to make | |
| 1392 // sure we can capture all the incoming oop args from the | |
| 1393 // caller. | |
| 1394 // | |
| 1395 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); | |
| 1396 | |
| 1397 // Mark location of rbp (someday) | |
| 1398 // map->set_callee_saved(VMRegImpl::stack2reg( stack_slots - 2), stack_slots * 2, 0, vmreg(rbp)); | |
| 1399 | |
| 1400 // Use eax, ebx as temporaries during any memory-memory moves we have to do | |
| 1401 // All inbound args are referenced based on rbp and all outbound args via rsp. | |
| 1402 | |
| 1403 | |
| 1404 #ifdef ASSERT | |
| 1405 bool reg_destroyed[RegisterImpl::number_of_registers]; | |
| 1406 bool freg_destroyed[XMMRegisterImpl::number_of_registers]; | |
| 1407 for ( int r = 0 ; r < RegisterImpl::number_of_registers ; r++ ) { | |
| 1408 reg_destroyed[r] = false; | |
| 1409 } | |
| 1410 for ( int f = 0 ; f < XMMRegisterImpl::number_of_registers ; f++ ) { | |
| 1411 freg_destroyed[f] = false; | |
| 1412 } | |
| 1413 | |
| 1414 #endif /* ASSERT */ | |
| 1415 | |
| 1416 | |
| 1417 int c_arg = total_c_args - 1; | |
| 1418 for ( int i = total_in_args - 1; i >= 0 ; i--, c_arg-- ) { | |
| 1419 #ifdef ASSERT | |
| 1420 if (in_regs[i].first()->is_Register()) { | |
| 1421 assert(!reg_destroyed[in_regs[i].first()->as_Register()->encoding()], "destroyed reg!"); | |
| 1422 } else if (in_regs[i].first()->is_XMMRegister()) { | |
| 1423 assert(!freg_destroyed[in_regs[i].first()->as_XMMRegister()->encoding()], "destroyed reg!"); | |
| 1424 } | |
| 1425 if (out_regs[c_arg].first()->is_Register()) { | |
| 1426 reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true; | |
| 1427 } else if (out_regs[c_arg].first()->is_XMMRegister()) { | |
| 1428 freg_destroyed[out_regs[c_arg].first()->as_XMMRegister()->encoding()] = true; | |
| 1429 } | |
| 1430 #endif /* ASSERT */ | |
| 1431 switch (in_sig_bt[i]) { | |
| 1432 case T_ARRAY: | |
| 1433 case T_OBJECT: | |
| 1434 object_move(masm, map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg], | |
| 1435 ((i == 0) && (!is_static)), | |
| 1436 &receiver_offset); | |
| 1437 break; | |
| 1438 case T_VOID: | |
| 1439 break; | |
| 1440 | |
| 1441 case T_FLOAT: | |
| 1442 float_move(masm, in_regs[i], out_regs[c_arg]); | |
| 1443 break; | |
| 1444 | |
| 1445 case T_DOUBLE: | |
| 1446 assert( i + 1 < total_in_args && | |
| 1447 in_sig_bt[i + 1] == T_VOID && | |
| 1448 out_sig_bt[c_arg+1] == T_VOID, "bad arg list"); | |
| 1449 double_move(masm, in_regs[i], out_regs[c_arg]); | |
| 1450 break; | |
| 1451 | |
| 1452 case T_LONG : | |
| 1453 long_move(masm, in_regs[i], out_regs[c_arg]); | |
| 1454 break; | |
| 1455 | |
| 1456 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); | |
| 1457 | |
| 1458 default: | |
| 1459 move32_64(masm, in_regs[i], out_regs[c_arg]); | |
| 1460 } | |
| 1461 } | |
| 1462 | |
| 1463 // point c_arg at the first arg that is already loaded in case we | |
| 1464 // need to spill before we call out | |
| 1465 c_arg++; | |
| 1466 | |
| 1467 // Pre-load a static method's oop into r14. Used both by locking code and | |
| 1468 // the normal JNI call code. | |
| 1469 if (method->is_static()) { | |
| 1470 | |
| 1471 // load oop into a register | |
| 1472 __ movoop(oop_handle_reg, JNIHandles::make_local(Klass::cast(method->method_holder())->java_mirror())); | |
| 1473 | |
| 1474 // Now handlize the static class mirror it's known not-null. | |
| 304 | 1475 __ movptr(Address(rsp, klass_offset), oop_handle_reg); |
| 0 | 1476 map->set_oop(VMRegImpl::stack2reg(klass_slot_offset)); |
| 1477 | |
| 1478 // Now get the handle | |
| 304 | 1479 __ lea(oop_handle_reg, Address(rsp, klass_offset)); |
| 0 | 1480 // store the klass handle as second argument |
| 304 | 1481 __ movptr(c_rarg1, oop_handle_reg); |
| 0 | 1482 // and protect the arg if we must spill |
| 1483 c_arg--; | |
| 1484 } | |
| 1485 | |
| 1486 // Change state to native (we save the return address in the thread, since it might not | |
| 1487 // be pushed on the stack when we do a a stack traversal). It is enough that the pc() | |
| 1488 // points into the right code segment. It does not have to be the correct return pc. | |
| 1489 // We use the same pc/oopMap repeatedly when we call out | |
| 1490 | |
| 1491 intptr_t the_pc = (intptr_t) __ pc(); | |
| 1492 oop_maps->add_gc_map(the_pc - start, map); | |
| 1493 | |
| 1494 __ set_last_Java_frame(rsp, noreg, (address)the_pc); | |
| 1495 | |
| 1496 | |
| 1497 // We have all of the arguments setup at this point. We must not touch any register | |
| 1498 // argument registers at this point (what if we save/restore them there are no oop? | |
| 1499 | |
| 1500 { | |
| 1501 SkipIfEqual skip(masm, &DTraceMethodProbes, false); | |
| 1502 // protect the args we've loaded | |
| 1503 save_args(masm, total_c_args, c_arg, out_regs); | |
| 1504 __ movoop(c_rarg1, JNIHandles::make_local(method())); | |
| 1505 __ call_VM_leaf( | |
| 1506 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
| 1507 r15_thread, c_rarg1); | |
| 1508 restore_args(masm, total_c_args, c_arg, out_regs); | |
| 1509 } | |
| 1510 | |
|
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1511 // RedefineClasses() tracing support for obsolete method entry |
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1512 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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1513 // protect the args we've loaded |
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1514 save_args(masm, total_c_args, c_arg, out_regs); |
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1515 __ movoop(c_rarg1, JNIHandles::make_local(method())); |
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1516 __ call_VM_leaf( |
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1517 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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1518 r15_thread, c_rarg1); |
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1519 restore_args(masm, total_c_args, c_arg, out_regs); |
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1520 } |
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1521 |
| 0 | 1522 // Lock a synchronized method |
| 1523 | |
| 1524 // Register definitions used by locking and unlocking | |
| 1525 | |
| 1526 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
| 1527 const Register obj_reg = rbx; // Will contain the oop | |
| 1528 const Register lock_reg = r13; // Address of compiler lock object (BasicLock) | |
| 1529 const Register old_hdr = r13; // value of old header at unlock time | |
| 1530 | |
| 1531 Label slow_path_lock; | |
| 1532 Label lock_done; | |
| 1533 | |
| 1534 if (method->is_synchronized()) { | |
| 1535 | |
| 1536 | |
| 1537 const int mark_word_offset = BasicLock::displaced_header_offset_in_bytes(); | |
| 1538 | |
| 1539 // Get the handle (the 2nd argument) | |
| 304 | 1540 __ mov(oop_handle_reg, c_rarg1); |
| 0 | 1541 |
| 1542 // Get address of the box | |
| 1543 | |
| 304 | 1544 __ lea(lock_reg, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
| 0 | 1545 |
| 1546 // Load the oop from the handle | |
| 304 | 1547 __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
| 0 | 1548 |
| 1549 if (UseBiasedLocking) { | |
| 1550 __ biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, lock_done, &slow_path_lock); | |
| 1551 } | |
| 1552 | |
| 1553 // Load immediate 1 into swap_reg %rax | |
| 1554 __ movl(swap_reg, 1); | |
| 1555 | |
| 1556 // Load (object->mark() | 1) into swap_reg %rax | |
| 304 | 1557 __ orptr(swap_reg, Address(obj_reg, 0)); |
| 0 | 1558 |
| 1559 // Save (object->mark() | 1) into BasicLock's displaced header | |
| 304 | 1560 __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
| 0 | 1561 |
| 1562 if (os::is_MP()) { | |
| 1563 __ lock(); | |
| 1564 } | |
| 1565 | |
| 1566 // src -> dest iff dest == rax else rax <- dest | |
| 304 | 1567 __ cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
| 0 | 1568 __ jcc(Assembler::equal, lock_done); |
| 1569 | |
| 1570 // Hmm should this move to the slow path code area??? | |
| 1571 | |
| 1572 // Test if the oopMark is an obvious stack pointer, i.e., | |
| 1573 // 1) (mark & 3) == 0, and | |
| 1574 // 2) rsp <= mark < mark + os::pagesize() | |
| 1575 // These 3 tests can be done by evaluating the following | |
| 1576 // expression: ((mark - rsp) & (3 - os::vm_page_size())), | |
| 1577 // assuming both stack pointer and pagesize have their | |
| 1578 // least significant 2 bits clear. | |
| 1579 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg | |
| 1580 | |
| 304 | 1581 __ subptr(swap_reg, rsp); |
| 1582 __ andptr(swap_reg, 3 - os::vm_page_size()); | |
| 0 | 1583 |
| 1584 // Save the test result, for recursive case, the result is zero | |
| 304 | 1585 __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
| 0 | 1586 __ jcc(Assembler::notEqual, slow_path_lock); |
| 1587 | |
| 1588 // Slow path will re-enter here | |
| 1589 | |
| 1590 __ bind(lock_done); | |
| 1591 } | |
| 1592 | |
| 1593 | |
| 1594 // Finally just about ready to make the JNI call | |
| 1595 | |
| 1596 | |
| 1597 // get JNIEnv* which is first argument to native | |
| 1598 | |
| 304 | 1599 __ lea(c_rarg0, Address(r15_thread, in_bytes(JavaThread::jni_environment_offset()))); |
| 0 | 1600 |
| 1601 // Now set thread in native | |
| 304 | 1602 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_native); |
| 0 | 1603 |
| 1604 __ call(RuntimeAddress(method->native_function())); | |
| 1605 | |
| 1606 // Either restore the MXCSR register after returning from the JNI Call | |
| 1607 // or verify that it wasn't changed. | |
| 1608 if (RestoreMXCSROnJNICalls) { | |
| 304 | 1609 __ ldmxcsr(ExternalAddress(StubRoutines::x86::mxcsr_std())); |
| 0 | 1610 |
| 1611 } | |
| 1612 else if (CheckJNICalls ) { | |
| 304 | 1613 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::verify_mxcsr_entry()))); |
| 0 | 1614 } |
| 1615 | |
| 1616 | |
| 1617 // Unpack native results. | |
| 1618 switch (ret_type) { | |
| 1619 case T_BOOLEAN: __ c2bool(rax); break; | |
| 1620 case T_CHAR : __ movzwl(rax, rax); break; | |
| 1621 case T_BYTE : __ sign_extend_byte (rax); break; | |
| 1622 case T_SHORT : __ sign_extend_short(rax); break; | |
| 1623 case T_INT : /* nothing to do */ break; | |
| 1624 case T_DOUBLE : | |
| 1625 case T_FLOAT : | |
| 1626 // Result is in xmm0 we'll save as needed | |
| 1627 break; | |
| 1628 case T_ARRAY: // Really a handle | |
| 1629 case T_OBJECT: // Really a handle | |
| 1630 break; // can't de-handlize until after safepoint check | |
| 1631 case T_VOID: break; | |
| 1632 case T_LONG: break; | |
| 1633 default : ShouldNotReachHere(); | |
| 1634 } | |
| 1635 | |
| 1636 // Switch thread to "native transition" state before reading the synchronization state. | |
| 1637 // This additional state is necessary because reading and testing the synchronization | |
| 1638 // state is not atomic w.r.t. GC, as this scenario demonstrates: | |
| 1639 // Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted. | |
| 1640 // VM thread changes sync state to synchronizing and suspends threads for GC. | |
| 1641 // Thread A is resumed to finish this native method, but doesn't block here since it | |
| 1642 // didn't see any synchronization is progress, and escapes. | |
| 304 | 1643 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_native_trans); |
| 0 | 1644 |
| 1645 if(os::is_MP()) { | |
| 1646 if (UseMembar) { | |
| 1647 // Force this write out before the read below | |
| 1648 __ membar(Assembler::Membar_mask_bits( | |
| 1649 Assembler::LoadLoad | Assembler::LoadStore | | |
| 1650 Assembler::StoreLoad | Assembler::StoreStore)); | |
| 1651 } else { | |
| 1652 // Write serialization page so VM thread can do a pseudo remote membar. | |
| 1653 // We use the current thread pointer to calculate a thread specific | |
| 1654 // offset to write to within the page. This minimizes bus traffic | |
| 1655 // due to cache line collision. | |
| 1656 __ serialize_memory(r15_thread, rcx); | |
| 1657 } | |
| 1658 } | |
| 1659 | |
| 1660 | |
| 1661 // check for safepoint operation in progress and/or pending suspend requests | |
| 1662 { | |
| 1663 Label Continue; | |
| 1664 | |
| 1665 __ cmp32(ExternalAddress((address)SafepointSynchronize::address_of_state()), | |
| 1666 SafepointSynchronize::_not_synchronized); | |
| 1667 | |
| 1668 Label L; | |
| 1669 __ jcc(Assembler::notEqual, L); | |
| 1670 __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0); | |
| 1671 __ jcc(Assembler::equal, Continue); | |
| 1672 __ bind(L); | |
| 1673 | |
| 1674 // Don't use call_VM as it will see a possible pending exception and forward it | |
| 1675 // and never return here preventing us from clearing _last_native_pc down below. | |
| 1676 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are | |
| 1677 // preserved and correspond to the bcp/locals pointers. So we do a runtime call | |
| 1678 // by hand. | |
| 1679 // | |
| 1680 save_native_result(masm, ret_type, stack_slots); | |
| 304 | 1681 __ mov(c_rarg0, r15_thread); |
| 1682 __ mov(r12, rsp); // remember sp | |
| 1683 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
| 1684 __ andptr(rsp, -16); // align stack as required by ABI | |
| 0 | 1685 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans))); |
| 304 | 1686 __ mov(rsp, r12); // restore sp |
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1687 __ reinit_heapbase(); |
| 0 | 1688 // Restore any method result value |
| 1689 restore_native_result(masm, ret_type, stack_slots); | |
| 1690 __ bind(Continue); | |
| 1691 } | |
| 1692 | |
| 1693 // change thread state | |
| 1694 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_Java); | |
| 1695 | |
| 1696 Label reguard; | |
| 1697 Label reguard_done; | |
| 1698 __ cmpl(Address(r15_thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled); | |
| 1699 __ jcc(Assembler::equal, reguard); | |
| 1700 __ bind(reguard_done); | |
| 1701 | |
| 1702 // native result if any is live | |
| 1703 | |
| 1704 // Unlock | |
| 1705 Label unlock_done; | |
| 1706 Label slow_path_unlock; | |
| 1707 if (method->is_synchronized()) { | |
| 1708 | |
| 1709 // Get locked oop from the handle we passed to jni | |
| 304 | 1710 __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
| 0 | 1711 |
| 1712 Label done; | |
| 1713 | |
| 1714 if (UseBiasedLocking) { | |
| 1715 __ biased_locking_exit(obj_reg, old_hdr, done); | |
| 1716 } | |
| 1717 | |
| 1718 // Simple recursive lock? | |
| 1719 | |
| 304 | 1720 __ cmpptr(Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size), (int32_t)NULL_WORD); |
| 0 | 1721 __ jcc(Assembler::equal, done); |
| 1722 | |
| 1723 // Must save rax if if it is live now because cmpxchg must use it | |
| 1724 if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { | |
| 1725 save_native_result(masm, ret_type, stack_slots); | |
| 1726 } | |
| 1727 | |
| 1728 | |
| 1729 // get address of the stack lock | |
| 304 | 1730 __ lea(rax, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
| 0 | 1731 // get old displaced header |
| 304 | 1732 __ movptr(old_hdr, Address(rax, 0)); |
| 0 | 1733 |
| 1734 // Atomic swap old header if oop still contains the stack lock | |
| 1735 if (os::is_MP()) { | |
| 1736 __ lock(); | |
| 1737 } | |
| 304 | 1738 __ cmpxchgptr(old_hdr, Address(obj_reg, 0)); |
| 0 | 1739 __ jcc(Assembler::notEqual, slow_path_unlock); |
| 1740 | |
| 1741 // slow path re-enters here | |
| 1742 __ bind(unlock_done); | |
| 1743 if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { | |
| 1744 restore_native_result(masm, ret_type, stack_slots); | |
| 1745 } | |
| 1746 | |
| 1747 __ bind(done); | |
| 1748 | |
| 1749 } | |
| 1750 { | |
| 1751 SkipIfEqual skip(masm, &DTraceMethodProbes, false); | |
| 1752 save_native_result(masm, ret_type, stack_slots); | |
| 1753 __ movoop(c_rarg1, JNIHandles::make_local(method())); | |
| 1754 __ call_VM_leaf( | |
| 1755 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
| 1756 r15_thread, c_rarg1); | |
| 1757 restore_native_result(masm, ret_type, stack_slots); | |
| 1758 } | |
| 1759 | |
| 1760 __ reset_last_Java_frame(false, true); | |
| 1761 | |
| 1762 // Unpack oop result | |
| 1763 if (ret_type == T_OBJECT || ret_type == T_ARRAY) { | |
| 1764 Label L; | |
| 304 | 1765 __ testptr(rax, rax); |
| 0 | 1766 __ jcc(Assembler::zero, L); |
| 304 | 1767 __ movptr(rax, Address(rax, 0)); |
| 0 | 1768 __ bind(L); |
| 1769 __ verify_oop(rax); | |
| 1770 } | |
| 1771 | |
| 1772 // reset handle block | |
| 304 | 1773 __ movptr(rcx, Address(r15_thread, JavaThread::active_handles_offset())); |
| 1774 __ movptr(Address(rcx, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD); | |
| 0 | 1775 |
| 1776 // pop our frame | |
| 1777 | |
| 1778 __ leave(); | |
| 1779 | |
| 1780 // Any exception pending? | |
| 304 | 1781 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
| 0 | 1782 __ jcc(Assembler::notEqual, exception_pending); |
| 1783 | |
| 1784 // Return | |
| 1785 | |
| 1786 __ ret(0); | |
| 1787 | |
| 1788 // Unexpected paths are out of line and go here | |
| 1789 | |
| 1790 // forward the exception | |
| 1791 __ bind(exception_pending); | |
| 1792 | |
| 1793 // and forward the exception | |
| 1794 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
| 1795 | |
| 1796 | |
| 1797 // Slow path locking & unlocking | |
| 1798 if (method->is_synchronized()) { | |
| 1799 | |
| 1800 // BEGIN Slow path lock | |
| 1801 __ bind(slow_path_lock); | |
| 1802 | |
| 1803 // has last_Java_frame setup. No exceptions so do vanilla call not call_VM | |
| 1804 // args are (oop obj, BasicLock* lock, JavaThread* thread) | |
| 1805 | |
| 1806 // protect the args we've loaded | |
| 1807 save_args(masm, total_c_args, c_arg, out_regs); | |
| 1808 | |
| 304 | 1809 __ mov(c_rarg0, obj_reg); |
| 1810 __ mov(c_rarg1, lock_reg); | |
| 1811 __ mov(c_rarg2, r15_thread); | |
| 0 | 1812 |
| 1813 // Not a leaf but we have last_Java_frame setup as we want | |
| 1814 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_locking_C), 3); | |
| 1815 restore_args(masm, total_c_args, c_arg, out_regs); | |
| 1816 | |
| 1817 #ifdef ASSERT | |
| 1818 { Label L; | |
| 304 | 1819 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
| 0 | 1820 __ jcc(Assembler::equal, L); |
| 1821 __ stop("no pending exception allowed on exit from monitorenter"); | |
| 1822 __ bind(L); | |
| 1823 } | |
| 1824 #endif | |
| 1825 __ jmp(lock_done); | |
| 1826 | |
| 1827 // END Slow path lock | |
| 1828 | |
| 1829 // BEGIN Slow path unlock | |
| 1830 __ bind(slow_path_unlock); | |
| 1831 | |
| 1832 // If we haven't already saved the native result we must save it now as xmm registers | |
| 1833 // are still exposed. | |
| 1834 | |
| 1835 if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { | |
| 1836 save_native_result(masm, ret_type, stack_slots); | |
| 1837 } | |
| 1838 | |
| 304 | 1839 __ lea(c_rarg1, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
| 1840 | |
| 1841 __ mov(c_rarg0, obj_reg); | |
| 1842 __ mov(r12, rsp); // remember sp | |
| 1843 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
| 1844 __ andptr(rsp, -16); // align stack as required by ABI | |
| 0 | 1845 |
| 1846 // Save pending exception around call to VM (which contains an EXCEPTION_MARK) | |
| 1847 // NOTE that obj_reg == rbx currently | |
| 304 | 1848 __ movptr(rbx, Address(r15_thread, in_bytes(Thread::pending_exception_offset()))); |
| 1849 __ movptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); | |
| 0 | 1850 |
| 1851 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_unlocking_C))); | |
| 304 | 1852 __ mov(rsp, r12); // restore sp |
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1853 __ reinit_heapbase(); |
| 0 | 1854 #ifdef ASSERT |
| 1855 { | |
| 1856 Label L; | |
| 304 | 1857 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int)NULL_WORD); |
| 0 | 1858 __ jcc(Assembler::equal, L); |
| 1859 __ stop("no pending exception allowed on exit complete_monitor_unlocking_C"); | |
| 1860 __ bind(L); | |
| 1861 } | |
| 1862 #endif /* ASSERT */ | |
| 1863 | |
| 304 | 1864 __ movptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), rbx); |
| 0 | 1865 |
| 1866 if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { | |
| 1867 restore_native_result(masm, ret_type, stack_slots); | |
| 1868 } | |
| 1869 __ jmp(unlock_done); | |
| 1870 | |
| 1871 // END Slow path unlock | |
| 1872 | |
| 1873 } // synchronized | |
| 1874 | |
| 1875 // SLOW PATH Reguard the stack if needed | |
| 1876 | |
| 1877 __ bind(reguard); | |
| 1878 save_native_result(masm, ret_type, stack_slots); | |
| 304 | 1879 __ mov(r12, rsp); // remember sp |
| 1880 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
| 1881 __ andptr(rsp, -16); // align stack as required by ABI | |
| 0 | 1882 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); |
| 304 | 1883 __ mov(rsp, r12); // restore sp |
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1884 __ reinit_heapbase(); |
| 0 | 1885 restore_native_result(masm, ret_type, stack_slots); |
| 1886 // and continue | |
| 1887 __ jmp(reguard_done); | |
| 1888 | |
| 1889 | |
| 1890 | |
| 1891 __ flush(); | |
| 1892 | |
| 1893 nmethod *nm = nmethod::new_native_nmethod(method, | |
| 1894 masm->code(), | |
| 1895 vep_offset, | |
| 1896 frame_complete, | |
| 1897 stack_slots / VMRegImpl::slots_per_word, | |
| 1898 (is_static ? in_ByteSize(klass_offset) : in_ByteSize(receiver_offset)), | |
| 1899 in_ByteSize(lock_slot_offset*VMRegImpl::stack_slot_size), | |
| 1900 oop_maps); | |
| 1901 return nm; | |
| 1902 | |
| 1903 } | |
| 1904 | |
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1905 #ifdef HAVE_DTRACE_H |
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1906 // --------------------------------------------------------------------------- |
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1907 // Generate a dtrace nmethod for a given signature. The method takes arguments |
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1908 // in the Java compiled code convention, marshals them to the native |
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1909 // abi and then leaves nops at the position you would expect to call a native |
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1910 // function. When the probe is enabled the nops are replaced with a trap |
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1911 // instruction that dtrace inserts and the trace will cause a notification |
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1912 // to dtrace. |
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1913 // |
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1914 // The probes are only able to take primitive types and java/lang/String as |
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1915 // arguments. No other java types are allowed. Strings are converted to utf8 |
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1916 // strings so that from dtrace point of view java strings are converted to C |
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1917 // strings. There is an arbitrary fixed limit on the total space that a method |
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1918 // can use for converting the strings. (256 chars per string in the signature). |
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1919 // So any java string larger then this is truncated. |
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1920 |
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1921 static int fp_offset[ConcreteRegisterImpl::number_of_registers] = { 0 }; |
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1922 static bool offsets_initialized = false; |
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1923 |
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1924 |
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1925 nmethod *SharedRuntime::generate_dtrace_nmethod(MacroAssembler *masm, |
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1926 methodHandle method) { |
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1927 |
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1928 |
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1929 // generate_dtrace_nmethod is guarded by a mutex so we are sure to |
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1930 // be single threaded in this method. |
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1931 assert(AdapterHandlerLibrary_lock->owned_by_self(), "must be"); |
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1932 |
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1933 if (!offsets_initialized) { |
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1934 fp_offset[c_rarg0->as_VMReg()->value()] = -1 * wordSize; |
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1935 fp_offset[c_rarg1->as_VMReg()->value()] = -2 * wordSize; |
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1936 fp_offset[c_rarg2->as_VMReg()->value()] = -3 * wordSize; |
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1937 fp_offset[c_rarg3->as_VMReg()->value()] = -4 * wordSize; |
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1938 fp_offset[c_rarg4->as_VMReg()->value()] = -5 * wordSize; |
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1939 fp_offset[c_rarg5->as_VMReg()->value()] = -6 * wordSize; |
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1940 |
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1941 fp_offset[c_farg0->as_VMReg()->value()] = -7 * wordSize; |
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1942 fp_offset[c_farg1->as_VMReg()->value()] = -8 * wordSize; |
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1943 fp_offset[c_farg2->as_VMReg()->value()] = -9 * wordSize; |
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1944 fp_offset[c_farg3->as_VMReg()->value()] = -10 * wordSize; |
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1945 fp_offset[c_farg4->as_VMReg()->value()] = -11 * wordSize; |
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1946 fp_offset[c_farg5->as_VMReg()->value()] = -12 * wordSize; |
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1947 fp_offset[c_farg6->as_VMReg()->value()] = -13 * wordSize; |
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1948 fp_offset[c_farg7->as_VMReg()->value()] = -14 * wordSize; |
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1949 |
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1950 offsets_initialized = true; |
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1951 } |
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1952 // Fill in the signature array, for the calling-convention call. |
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1953 int total_args_passed = method->size_of_parameters(); |
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1954 |
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1955 BasicType* in_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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1956 VMRegPair *in_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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1957 |
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1958 // The signature we are going to use for the trap that dtrace will see |
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1959 // java/lang/String is converted. We drop "this" and any other object |
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1960 // is converted to NULL. (A one-slot java/lang/Long object reference |
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1961 // is converted to a two-slot long, which is why we double the allocation). |
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1962 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed * 2); |
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1963 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed * 2); |
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1964 |
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1965 int i=0; |
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1966 int total_strings = 0; |
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1967 int first_arg_to_pass = 0; |
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1968 int total_c_args = 0; |
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1969 |
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1970 // Skip the receiver as dtrace doesn't want to see it |
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1971 if( !method->is_static() ) { |
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1972 in_sig_bt[i++] = T_OBJECT; |
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1973 first_arg_to_pass = 1; |
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1974 } |
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1975 |
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1976 // We need to convert the java args to where a native (non-jni) function |
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1977 // would expect them. To figure out where they go we convert the java |
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1978 // signature to a C signature. |
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1979 |
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1980 SignatureStream ss(method->signature()); |
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1981 for ( ; !ss.at_return_type(); ss.next()) { |
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1982 BasicType bt = ss.type(); |
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1983 in_sig_bt[i++] = bt; // Collect remaining bits of signature |
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1984 out_sig_bt[total_c_args++] = bt; |
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1985 if( bt == T_OBJECT) { |
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1986 symbolOop s = ss.as_symbol_or_null(); |
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1987 if (s == vmSymbols::java_lang_String()) { |
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1988 total_strings++; |
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1989 out_sig_bt[total_c_args-1] = T_ADDRESS; |
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1990 } else if (s == vmSymbols::java_lang_Boolean() || |
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1991 s == vmSymbols::java_lang_Character() || |
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1992 s == vmSymbols::java_lang_Byte() || |
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1993 s == vmSymbols::java_lang_Short() || |
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1994 s == vmSymbols::java_lang_Integer() || |
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1995 s == vmSymbols::java_lang_Float()) { |
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1996 out_sig_bt[total_c_args-1] = T_INT; |
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1997 } else if (s == vmSymbols::java_lang_Long() || |
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1998 s == vmSymbols::java_lang_Double()) { |
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1999 out_sig_bt[total_c_args-1] = T_LONG; |
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2000 out_sig_bt[total_c_args++] = T_VOID; |
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2001 } |
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2002 } else if ( bt == T_LONG || bt == T_DOUBLE ) { |
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2003 in_sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2004 // We convert double to long |
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2005 out_sig_bt[total_c_args-1] = T_LONG; |
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2006 out_sig_bt[total_c_args++] = T_VOID; |
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2007 } else if ( bt == T_FLOAT) { |
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2008 // We convert float to int |
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2009 out_sig_bt[total_c_args-1] = T_INT; |
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2010 } |
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2011 } |
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2012 |
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2013 assert(i==total_args_passed, "validly parsed signature"); |
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2014 |
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2015 // Now get the compiled-Java layout as input arguments |
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2016 int comp_args_on_stack; |
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2017 comp_args_on_stack = SharedRuntime::java_calling_convention( |
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2018 in_sig_bt, in_regs, total_args_passed, false); |
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2019 |
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2020 // Now figure out where the args must be stored and how much stack space |
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2021 // they require (neglecting out_preserve_stack_slots but space for storing |
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2022 // the 1st six register arguments). It's weird see int_stk_helper. |
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2023 |
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2024 int out_arg_slots; |
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2025 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); |
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2026 |
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2027 // Calculate the total number of stack slots we will need. |
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2028 |
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2029 // First count the abi requirement plus all of the outgoing args |
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2030 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; |
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2031 |
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2032 // Now space for the string(s) we must convert |
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2033 int* string_locs = NEW_RESOURCE_ARRAY(int, total_strings + 1); |
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2034 for (i = 0; i < total_strings ; i++) { |
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2035 string_locs[i] = stack_slots; |
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2036 stack_slots += max_dtrace_string_size / VMRegImpl::stack_slot_size; |
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2037 } |
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2038 |
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2039 // Plus the temps we might need to juggle register args |
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2040 // regs take two slots each |
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2041 stack_slots += (Argument::n_int_register_parameters_c + |
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2042 Argument::n_float_register_parameters_c) * 2; |
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2043 |
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2044 |
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2045 // + 4 for return address (which we own) and saved rbp, |
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2046 |
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2047 stack_slots += 4; |
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2048 |
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2049 // Ok The space we have allocated will look like: |
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2050 // |
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2051 // |
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2052 // FP-> | | |
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2053 // |---------------------| |
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2054 // | string[n] | |
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2055 // |---------------------| <- string_locs[n] |
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2056 // | string[n-1] | |
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2057 // |---------------------| <- string_locs[n-1] |
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2058 // | ... | |
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2059 // | ... | |
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2060 // |---------------------| <- string_locs[1] |
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2061 // | string[0] | |
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2062 // |---------------------| <- string_locs[0] |
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2063 // | outbound memory | |
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2064 // | based arguments | |
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2065 // | | |
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2066 // |---------------------| |
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2067 // | | |
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2068 // SP-> | out_preserved_slots | |
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2069 // |
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2070 // |
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2071 |
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2072 // Now compute actual number of stack words we need rounding to make |
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2073 // stack properly aligned. |
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2074 stack_slots = round_to(stack_slots, 4 * VMRegImpl::slots_per_word); |
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2075 |
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2076 int stack_size = stack_slots * VMRegImpl::stack_slot_size; |
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2077 |
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2078 intptr_t start = (intptr_t)__ pc(); |
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2079 |
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2080 // First thing make an ic check to see if we should even be here |
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2081 |
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2082 // We are free to use all registers as temps without saving them and |
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2083 // restoring them except rbp. rbp, is the only callee save register |
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2084 // as far as the interpreter and the compiler(s) are concerned. |
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2085 |
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2086 const Register ic_reg = rax; |
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2087 const Register receiver = rcx; |
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2088 Label hit; |
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2089 Label exception_pending; |
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2090 |
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2091 |
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2092 __ verify_oop(receiver); |
|
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2093 __ cmpl(ic_reg, Address(receiver, oopDesc::klass_offset_in_bytes())); |
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2094 __ jcc(Assembler::equal, hit); |
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2095 |
|
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2096 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); |
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2097 |
|
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2098 // verified entry must be aligned for code patching. |
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2099 // and the first 5 bytes must be in the same cache line |
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2100 // if we align at 8 then we will be sure 5 bytes are in the same line |
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2101 __ align(8); |
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2102 |
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2103 __ bind(hit); |
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2104 |
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2105 int vep_offset = ((intptr_t)__ pc()) - start; |
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2106 |
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2107 |
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2108 // The instruction at the verified entry point must be 5 bytes or longer |
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2109 // because it can be patched on the fly by make_non_entrant. The stack bang |
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2110 // instruction fits that requirement. |
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2111 |
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2112 // Generate stack overflow check |
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2113 |
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2114 if (UseStackBanging) { |
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2115 if (stack_size <= StackShadowPages*os::vm_page_size()) { |
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2116 __ bang_stack_with_offset(StackShadowPages*os::vm_page_size()); |
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2117 } else { |
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2118 __ movl(rax, stack_size); |
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2119 __ bang_stack_size(rax, rbx); |
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2120 } |
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2121 } else { |
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2122 // need a 5 byte instruction to allow MT safe patching to non-entrant |
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2123 __ fat_nop(); |
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2124 } |
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2125 |
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2126 assert(((uintptr_t)__ pc() - start - vep_offset) >= 5, |
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2127 "valid size for make_non_entrant"); |
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2128 |
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2129 // Generate a new frame for the wrapper. |
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2130 __ enter(); |
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2131 |
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2132 // -4 because return address is already present and so is saved rbp, |
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2133 if (stack_size - 2*wordSize != 0) { |
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2134 __ subq(rsp, stack_size - 2*wordSize); |
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2135 } |
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2136 |
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2137 // Frame is now completed as far a size and linkage. |
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2138 |
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2139 int frame_complete = ((intptr_t)__ pc()) - start; |
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2140 |
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2141 int c_arg, j_arg; |
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2142 |
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2143 // State of input register args |
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2144 |
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2145 bool live[ConcreteRegisterImpl::number_of_registers]; |
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2146 |
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2147 live[j_rarg0->as_VMReg()->value()] = false; |
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2148 live[j_rarg1->as_VMReg()->value()] = false; |
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2149 live[j_rarg2->as_VMReg()->value()] = false; |
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2150 live[j_rarg3->as_VMReg()->value()] = false; |
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2151 live[j_rarg4->as_VMReg()->value()] = false; |
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2152 live[j_rarg5->as_VMReg()->value()] = false; |
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2153 |
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2154 live[j_farg0->as_VMReg()->value()] = false; |
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2155 live[j_farg1->as_VMReg()->value()] = false; |
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2156 live[j_farg2->as_VMReg()->value()] = false; |
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2157 live[j_farg3->as_VMReg()->value()] = false; |
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2158 live[j_farg4->as_VMReg()->value()] = false; |
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2159 live[j_farg5->as_VMReg()->value()] = false; |
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2160 live[j_farg6->as_VMReg()->value()] = false; |
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2161 live[j_farg7->as_VMReg()->value()] = false; |
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2162 |
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2163 |
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2164 bool rax_is_zero = false; |
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2165 |
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2166 // All args (except strings) destined for the stack are moved first |
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2167 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2168 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2169 VMRegPair src = in_regs[j_arg]; |
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2170 VMRegPair dst = out_regs[c_arg]; |
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2171 |
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2172 // Get the real reg value or a dummy (rsp) |
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2173 |
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2174 int src_reg = src.first()->is_reg() ? |
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2175 src.first()->value() : |
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2176 rsp->as_VMReg()->value(); |
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2177 |
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2178 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
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2179 (in_sig_bt[j_arg] == T_OBJECT && |
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2180 out_sig_bt[c_arg] != T_INT && |
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2181 out_sig_bt[c_arg] != T_ADDRESS && |
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2182 out_sig_bt[c_arg] != T_LONG); |
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2183 |
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2184 live[src_reg] = !useless; |
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2185 |
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2186 if (dst.first()->is_stack()) { |
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2187 |
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2188 // Even though a string arg in a register is still live after this loop |
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2189 // after the string conversion loop (next) it will be dead so we take |
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2190 // advantage of that now for simpler code to manage live. |
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2191 |
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2192 live[src_reg] = false; |
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2193 switch (in_sig_bt[j_arg]) { |
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2194 |
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2195 case T_ARRAY: |
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2196 case T_OBJECT: |
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2197 { |
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2198 Address stack_dst(rsp, reg2offset_out(dst.first())); |
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2199 |
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2200 if (out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
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2201 // need to unbox a one-word value |
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2202 Register in_reg = rax; |
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2203 if ( src.first()->is_reg() ) { |
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2204 in_reg = src.first()->as_Register(); |
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2205 } else { |
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2206 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); |
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2207 rax_is_zero = false; |
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2208 } |
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2209 Label skipUnbox; |
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2210 __ movptr(Address(rsp, reg2offset_out(dst.first())), |
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2211 (int32_t)NULL_WORD); |
|
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2212 __ testq(in_reg, in_reg); |
|
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2213 __ jcc(Assembler::zero, skipUnbox); |
|
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2214 |
|
165
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2215 BasicType bt = out_sig_bt[c_arg]; |
|
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2216 int box_offset = java_lang_boxing_object::value_offset_in_bytes(bt); |
|
116
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2217 Address src1(in_reg, box_offset); |
|
165
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2218 if ( bt == T_LONG ) { |
|
116
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2219 __ movq(in_reg, src1); |
|
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2220 __ movq(stack_dst, in_reg); |
|
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2221 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
|
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2222 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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2223 } else { |
|
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2224 __ movl(in_reg, src1); |
|
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2225 __ movl(stack_dst, in_reg); |
|
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2226 } |
|
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2227 |
|
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2228 __ bind(skipUnbox); |
|
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2229 } else if (out_sig_bt[c_arg] != T_ADDRESS) { |
|
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2230 // Convert the arg to NULL |
|
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2231 if (!rax_is_zero) { |
|
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2232 __ xorq(rax, rax); |
|
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2233 rax_is_zero = true; |
|
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2234 } |
|
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2235 __ movq(stack_dst, rax); |
|
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2236 } |
|
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|
2237 } |
|
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2238 break; |
|
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|
2239 |
|
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2240 case T_VOID: |
|
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2241 break; |
|
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|
2242 |
|
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2243 case T_FLOAT: |
|
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2244 // This does the right thing since we know it is destined for the |
|
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2245 // stack |
|
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2246 float_move(masm, src, dst); |
|
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2247 break; |
|
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|
2248 |
|
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2249 case T_DOUBLE: |
|
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2250 // This does the right thing since we know it is destined for the |
|
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2251 // stack |
|
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2252 double_move(masm, src, dst); |
|
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2253 break; |
|
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|
2254 |
|
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|
2255 case T_LONG : |
|
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2256 long_move(masm, src, dst); |
|
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|
2257 break; |
|
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|
2258 |
|
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2259 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); |
|
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|
2260 |
|
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|
2261 default: |
|
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|
2262 move32_64(masm, src, dst); |
|
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2263 } |
|
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|
2264 } |
|
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113
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|
2265 |
|
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|
2266 } |
|
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113
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|
2267 |
|
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|
2268 // If we have any strings we must store any register based arg to the stack |
|
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2269 // This includes any still live xmm registers too. |
|
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|
2270 |
|
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|
2271 int sid = 0; |
|
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|
2272 |
|
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|
2273 if (total_strings > 0 ) { |
|
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|
2274 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
|
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2275 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
|
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|
2276 VMRegPair src = in_regs[j_arg]; |
|
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|
2277 VMRegPair dst = out_regs[c_arg]; |
|
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|
2278 |
|
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|
2279 if (src.first()->is_reg()) { |
|
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|
2280 Address src_tmp(rbp, fp_offset[src.first()->value()]); |
|
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|
2281 |
|
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|
2282 // string oops were left untouched by the previous loop even if the |
|
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|
2283 // eventual (converted) arg is destined for the stack so park them |
|
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|
2284 // away now (except for first) |
|
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|
2285 |
|
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|
2286 if (out_sig_bt[c_arg] == T_ADDRESS) { |
|
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|
2287 Address utf8_addr = Address( |
|
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|
2288 rsp, string_locs[sid++] * VMRegImpl::stack_slot_size); |
|
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2289 if (sid != 1) { |
|
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|
2290 // The first string arg won't be killed until after the utf8 |
|
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|
2291 // conversion |
|
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|
2292 __ movq(utf8_addr, src.first()->as_Register()); |
|
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|
2293 } |
|
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|
2294 } else if (dst.first()->is_reg()) { |
|
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2295 if (in_sig_bt[j_arg] == T_FLOAT || in_sig_bt[j_arg] == T_DOUBLE) { |
|
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|
2296 |
|
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|
2297 // Convert the xmm register to an int and store it in the reserved |
|
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|
2298 // location for the eventual c register arg |
|
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|
2299 XMMRegister f = src.first()->as_XMMRegister(); |
|
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2300 if (in_sig_bt[j_arg] == T_FLOAT) { |
|
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|
2301 __ movflt(src_tmp, f); |
|
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|
2302 } else { |
|
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|
2303 __ movdbl(src_tmp, f); |
|
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|
2304 } |
|
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|
2305 } else { |
|
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|
2306 // If the arg is an oop type we don't support don't bother to store |
|
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|
2307 // it remember string was handled above. |
|
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|
2308 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
|
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2309 (in_sig_bt[j_arg] == T_OBJECT && |
|
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2310 out_sig_bt[c_arg] != T_INT && |
|
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|
2311 out_sig_bt[c_arg] != T_LONG); |
|
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|
2312 |
|
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|
2313 if (!useless) { |
|
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2314 __ movq(src_tmp, src.first()->as_Register()); |
|
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|
2315 } |
|
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|
2316 } |
|
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|
2317 } |
|
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|
2318 } |
|
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2319 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
|
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|
2320 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
|
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2321 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
|
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2322 } |
|
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|
2323 } |
|
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|
2324 |
|
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|
2325 // Now that the volatile registers are safe, convert all the strings |
|
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2326 sid = 0; |
|
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2327 |
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2328 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2329 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2330 if (out_sig_bt[c_arg] == T_ADDRESS) { |
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2331 // It's a string |
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2332 Address utf8_addr = Address( |
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2333 rsp, string_locs[sid++] * VMRegImpl::stack_slot_size); |
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2334 // The first string we find might still be in the original java arg |
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2335 // register |
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2336 |
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2337 VMReg src = in_regs[j_arg].first(); |
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2338 |
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2339 // We will need to eventually save the final argument to the trap |
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2340 // in the von-volatile location dedicated to src. This is the offset |
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2341 // from fp we will use. |
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2342 int src_off = src->is_reg() ? |
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2343 fp_offset[src->value()] : reg2offset_in(src); |
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2344 |
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2345 // This is where the argument will eventually reside |
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2346 VMRegPair dst = out_regs[c_arg]; |
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2347 |
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2348 if (src->is_reg()) { |
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2349 if (sid == 1) { |
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2350 __ movq(c_rarg0, src->as_Register()); |
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2351 } else { |
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2352 __ movq(c_rarg0, utf8_addr); |
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2353 } |
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2354 } else { |
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2355 // arg is still in the original location |
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2356 __ movq(c_rarg0, Address(rbp, reg2offset_in(src))); |
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2357 } |
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2358 Label done, convert; |
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2359 |
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2360 // see if the oop is NULL |
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2361 __ testq(c_rarg0, c_rarg0); |
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2362 __ jcc(Assembler::notEqual, convert); |
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2363 |
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2364 if (dst.first()->is_reg()) { |
|
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2365 // Save the ptr to utf string in the origina src loc or the tmp |
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2366 // dedicated to it |
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2367 __ movq(Address(rbp, src_off), c_rarg0); |
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2368 } else { |
|
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2369 __ movq(Address(rsp, reg2offset_out(dst.first())), c_rarg0); |
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2370 } |
|
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2371 __ jmp(done); |
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2372 |
|
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2373 __ bind(convert); |
|
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2374 |
|
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2375 __ lea(c_rarg1, utf8_addr); |
|
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2376 if (dst.first()->is_reg()) { |
|
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2377 __ movq(Address(rbp, src_off), c_rarg1); |
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2378 } else { |
|
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2379 __ movq(Address(rsp, reg2offset_out(dst.first())), c_rarg1); |
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2380 } |
|
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2381 // And do the conversion |
|
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2382 __ call(RuntimeAddress( |
|
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2383 CAST_FROM_FN_PTR(address, SharedRuntime::get_utf))); |
|
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2384 |
|
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2385 __ bind(done); |
|
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2386 } |
|
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2387 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
|
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2388 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
|
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2389 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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2390 } |
|
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2391 } |
|
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2392 // The get_utf call killed all the c_arg registers |
|
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2393 live[c_rarg0->as_VMReg()->value()] = false; |
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2394 live[c_rarg1->as_VMReg()->value()] = false; |
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2395 live[c_rarg2->as_VMReg()->value()] = false; |
|
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2396 live[c_rarg3->as_VMReg()->value()] = false; |
|
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2397 live[c_rarg4->as_VMReg()->value()] = false; |
|
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2398 live[c_rarg5->as_VMReg()->value()] = false; |
|
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2399 |
|
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2400 live[c_farg0->as_VMReg()->value()] = false; |
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2401 live[c_farg1->as_VMReg()->value()] = false; |
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2402 live[c_farg2->as_VMReg()->value()] = false; |
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2403 live[c_farg3->as_VMReg()->value()] = false; |
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2404 live[c_farg4->as_VMReg()->value()] = false; |
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2405 live[c_farg5->as_VMReg()->value()] = false; |
|
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2406 live[c_farg6->as_VMReg()->value()] = false; |
|
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2407 live[c_farg7->as_VMReg()->value()] = false; |
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2408 } |
|
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2409 |
|
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2410 // Now we can finally move the register args to their desired locations |
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2411 |
|
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2412 rax_is_zero = false; |
|
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2413 |
|
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2414 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
|
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2415 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
|
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2416 |
|
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2417 VMRegPair src = in_regs[j_arg]; |
|
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2418 VMRegPair dst = out_regs[c_arg]; |
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2419 |
|
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2420 // Only need to look for args destined for the interger registers (since we |
|
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2421 // convert float/double args to look like int/long outbound) |
|
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2422 if (dst.first()->is_reg()) { |
|
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2423 Register r = dst.first()->as_Register(); |
|
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2424 |
|
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2425 // Check if the java arg is unsupported and thereofre useless |
|
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2426 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
|
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2427 (in_sig_bt[j_arg] == T_OBJECT && |
|
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2428 out_sig_bt[c_arg] != T_INT && |
|
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2429 out_sig_bt[c_arg] != T_ADDRESS && |
|
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2430 out_sig_bt[c_arg] != T_LONG); |
|
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2431 |
|
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2432 |
|
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2433 // If we're going to kill an existing arg save it first |
|
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2434 if (live[dst.first()->value()]) { |
|
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2435 // you can't kill yourself |
|
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2436 if (src.first() != dst.first()) { |
|
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2437 __ movq(Address(rbp, fp_offset[dst.first()->value()]), r); |
|
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2438 } |
|
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2439 } |
|
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2440 if (src.first()->is_reg()) { |
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2441 if (live[src.first()->value()] ) { |
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2442 if (in_sig_bt[j_arg] == T_FLOAT) { |
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2443 __ movdl(r, src.first()->as_XMMRegister()); |
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2444 } else if (in_sig_bt[j_arg] == T_DOUBLE) { |
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2445 __ movdq(r, src.first()->as_XMMRegister()); |
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2446 } else if (r != src.first()->as_Register()) { |
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2447 if (!useless) { |
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2448 __ movq(r, src.first()->as_Register()); |
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2449 } |
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2450 } |
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2451 } else { |
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2452 // If the arg is an oop type we don't support don't bother to store |
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2453 // it |
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2454 if (!useless) { |
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2455 if (in_sig_bt[j_arg] == T_DOUBLE || |
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2456 in_sig_bt[j_arg] == T_LONG || |
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2457 in_sig_bt[j_arg] == T_OBJECT ) { |
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2458 __ movq(r, Address(rbp, fp_offset[src.first()->value()])); |
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2459 } else { |
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2460 __ movl(r, Address(rbp, fp_offset[src.first()->value()])); |
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2461 } |
|
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2462 } |
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2463 } |
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2464 live[src.first()->value()] = false; |
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2465 } else if (!useless) { |
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2466 // full sized move even for int should be ok |
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2467 __ movq(r, Address(rbp, reg2offset_in(src.first()))); |
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2468 } |
|
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2469 |
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2470 // At this point r has the original java arg in the final location |
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2471 // (assuming it wasn't useless). If the java arg was an oop |
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2472 // we have a bit more to do |
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2473 |
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2474 if (in_sig_bt[j_arg] == T_ARRAY || in_sig_bt[j_arg] == T_OBJECT ) { |
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2475 if (out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
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2476 // need to unbox a one-word value |
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2477 Label skip; |
|
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2478 __ testq(r, r); |
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2479 __ jcc(Assembler::equal, skip); |
|
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2480 BasicType bt = out_sig_bt[c_arg]; |
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2481 int box_offset = java_lang_boxing_object::value_offset_in_bytes(bt); |
|
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2482 Address src1(r, box_offset); |
|
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2483 if ( bt == T_LONG ) { |
|
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2484 __ movq(r, src1); |
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2485 } else { |
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2486 __ movl(r, src1); |
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2487 } |
|
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2488 __ bind(skip); |
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2489 |
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2490 } else if (out_sig_bt[c_arg] != T_ADDRESS) { |
|
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2491 // Convert the arg to NULL |
|
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2492 __ xorq(r, r); |
|
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2493 } |
|
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2494 } |
|
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2495 |
|
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2496 // dst can longer be holding an input value |
|
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2497 live[dst.first()->value()] = false; |
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2498 } |
|
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2499 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
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2500 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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2501 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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2502 } |
|
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2503 } |
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2504 |
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2505 |
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2506 // Ok now we are done. Need to place the nop that dtrace wants in order to |
|
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2507 // patch in the trap |
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2508 int patch_offset = ((intptr_t)__ pc()) - start; |
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2509 |
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2510 __ nop(); |
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2511 |
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2512 |
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2513 // Return |
|
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2514 |
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2515 __ leave(); |
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2516 __ ret(0); |
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2517 |
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2518 __ flush(); |
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2519 |
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2520 nmethod *nm = nmethod::new_dtrace_nmethod( |
|
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2521 method, masm->code(), vep_offset, patch_offset, frame_complete, |
|
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2522 stack_slots / VMRegImpl::slots_per_word); |
|
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2523 return nm; |
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2524 |
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2525 } |
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2526 |
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2527 #endif // HAVE_DTRACE_H |
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2528 |
| 0 | 2529 // this function returns the adjust size (in number of words) to a c2i adapter |
| 2530 // activation for use during deoptimization | |
| 2531 int Deoptimization::last_frame_adjust(int callee_parameters, int callee_locals ) { | |
| 2532 return (callee_locals - callee_parameters) * Interpreter::stackElementWords(); | |
| 2533 } | |
| 2534 | |
| 2535 | |
| 2536 uint SharedRuntime::out_preserve_stack_slots() { | |
| 2537 return 0; | |
| 2538 } | |
| 2539 | |
| 2540 | |
| 2541 //------------------------------generate_deopt_blob---------------------------- | |
| 2542 void SharedRuntime::generate_deopt_blob() { | |
| 2543 // Allocate space for the code | |
| 2544 ResourceMark rm; | |
| 2545 // Setup code generation tools | |
| 2546 CodeBuffer buffer("deopt_blob", 2048, 1024); | |
| 2547 MacroAssembler* masm = new MacroAssembler(&buffer); | |
| 2548 int frame_size_in_words; | |
| 2549 OopMap* map = NULL; | |
| 2550 OopMapSet *oop_maps = new OopMapSet(); | |
| 2551 | |
| 2552 // ------------- | |
| 2553 // This code enters when returning to a de-optimized nmethod. A return | |
| 2554 // address has been pushed on the the stack, and return values are in | |
| 2555 // registers. | |
| 2556 // If we are doing a normal deopt then we were called from the patched | |
| 2557 // nmethod from the point we returned to the nmethod. So the return | |
| 2558 // address on the stack is wrong by NativeCall::instruction_size | |
| 2559 // We will adjust the value so it looks like we have the original return | |
| 2560 // address on the stack (like when we eagerly deoptimized). | |
| 2561 // In the case of an exception pending when deoptimizing, we enter | |
| 2562 // with a return address on the stack that points after the call we patched | |
| 2563 // into the exception handler. We have the following register state from, | |
| 2564 // e.g., the forward exception stub (see stubGenerator_x86_64.cpp). | |
| 2565 // rax: exception oop | |
| 2566 // rbx: exception handler | |
| 2567 // rdx: throwing pc | |
| 2568 // So in this case we simply jam rdx into the useless return address and | |
| 2569 // the stack looks just like we want. | |
| 2570 // | |
| 2571 // At this point we need to de-opt. We save the argument return | |
| 2572 // registers. We call the first C routine, fetch_unroll_info(). This | |
| 2573 // routine captures the return values and returns a structure which | |
| 2574 // describes the current frame size and the sizes of all replacement frames. | |
| 2575 // The current frame is compiled code and may contain many inlined | |
| 2576 // functions, each with their own JVM state. We pop the current frame, then | |
| 2577 // push all the new frames. Then we call the C routine unpack_frames() to | |
| 2578 // populate these frames. Finally unpack_frames() returns us the new target | |
| 2579 // address. Notice that callee-save registers are BLOWN here; they have | |
| 2580 // already been captured in the vframeArray at the time the return PC was | |
| 2581 // patched. | |
| 2582 address start = __ pc(); | |
| 2583 Label cont; | |
| 2584 | |
| 2585 // Prolog for non exception case! | |
| 2586 | |
| 2587 // Save everything in sight. | |
| 2588 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
| 2589 | |
| 2590 // Normal deoptimization. Save exec mode for unpack_frames. | |
|
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2591 __ movl(r14, Deoptimization::Unpack_deopt); // callee-saved |
| 0 | 2592 __ jmp(cont); |
| 304 | 2593 |
| 2594 int reexecute_offset = __ pc() - start; | |
| 2595 | |
| 2596 // Reexecute case | |
| 2597 // return address is the pc describes what bci to do re-execute at | |
| 2598 | |
| 2599 // No need to update map as each call to save_live_registers will produce identical oopmap | |
| 2600 (void) RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
| 2601 | |
| 2602 __ movl(r14, Deoptimization::Unpack_reexecute); // callee-saved | |
| 2603 __ jmp(cont); | |
| 2604 | |
| 0 | 2605 int exception_offset = __ pc() - start; |
| 2606 | |
| 2607 // Prolog for exception case | |
| 2608 | |
| 304 | 2609 // all registers are dead at this entry point, except for rax, and |
| 2610 // rdx which contain the exception oop and exception pc | |
| 2611 // respectively. Set them in TLS and fall thru to the | |
| 2612 // unpack_with_exception_in_tls entry point. | |
| 2613 | |
| 2614 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), rdx); | |
| 2615 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), rax); | |
| 2616 | |
| 2617 int exception_in_tls_offset = __ pc() - start; | |
| 2618 | |
| 2619 // new implementation because exception oop is now passed in JavaThread | |
| 2620 | |
| 2621 // Prolog for exception case | |
| 2622 // All registers must be preserved because they might be used by LinearScan | |
| 2623 // Exceptiop oop and throwing PC are passed in JavaThread | |
| 2624 // tos: stack at point of call to method that threw the exception (i.e. only | |
| 2625 // args are on the stack, no return address) | |
| 2626 | |
| 2627 // make room on stack for the return address | |
| 2628 // It will be patched later with the throwing pc. The correct value is not | |
| 2629 // available now because loading it from memory would destroy registers. | |
| 2630 __ push(0); | |
| 0 | 2631 |
| 2632 // Save everything in sight. | |
| 2633 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
| 2634 | |
| 304 | 2635 // Now it is safe to overwrite any register |
| 2636 | |
| 0 | 2637 // Deopt during an exception. Save exec mode for unpack_frames. |
|
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2638 __ movl(r14, Deoptimization::Unpack_exception); // callee-saved |
| 0 | 2639 |
| 304 | 2640 // load throwing pc from JavaThread and patch it as the return address |
| 2641 // of the current frame. Then clear the field in JavaThread | |
| 2642 | |
| 2643 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); | |
| 2644 __ movptr(Address(rbp, wordSize), rdx); | |
| 2645 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD); | |
| 2646 | |
| 2647 #ifdef ASSERT | |
| 2648 // verify that there is really an exception oop in JavaThread | |
| 2649 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); | |
| 2650 __ verify_oop(rax); | |
| 2651 | |
| 2652 // verify that there is no pending exception | |
| 2653 Label no_pending_exception; | |
| 2654 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset())); | |
| 2655 __ testptr(rax, rax); | |
| 2656 __ jcc(Assembler::zero, no_pending_exception); | |
| 2657 __ stop("must not have pending exception here"); | |
| 2658 __ bind(no_pending_exception); | |
| 2659 #endif | |
| 2660 | |
| 0 | 2661 __ bind(cont); |
| 2662 | |
| 2663 // Call C code. Need thread and this frame, but NOT official VM entry | |
| 2664 // crud. We cannot block on this call, no GC can happen. | |
| 2665 // | |
| 2666 // UnrollBlock* fetch_unroll_info(JavaThread* thread) | |
| 2667 | |
| 2668 // fetch_unroll_info needs to call last_java_frame(). | |
| 2669 | |
| 2670 __ set_last_Java_frame(noreg, noreg, NULL); | |
| 2671 #ifdef ASSERT | |
| 2672 { Label L; | |
| 304 | 2673 __ cmpptr(Address(r15_thread, |
| 0 | 2674 JavaThread::last_Java_fp_offset()), |
| 304 | 2675 (int32_t)0); |
| 0 | 2676 __ jcc(Assembler::equal, L); |
| 2677 __ stop("SharedRuntime::generate_deopt_blob: last_Java_fp not cleared"); | |
| 2678 __ bind(L); | |
| 2679 } | |
| 2680 #endif // ASSERT | |
| 304 | 2681 __ mov(c_rarg0, r15_thread); |
| 0 | 2682 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::fetch_unroll_info))); |
| 2683 | |
| 2684 // Need to have an oopmap that tells fetch_unroll_info where to | |
| 2685 // find any register it might need. | |
| 2686 oop_maps->add_gc_map(__ pc() - start, map); | |
| 2687 | |
| 2688 __ reset_last_Java_frame(false, false); | |
| 2689 | |
| 2690 // Load UnrollBlock* into rdi | |
| 304 | 2691 __ mov(rdi, rax); |
| 2692 | |
| 2693 Label noException; | |
| 2694 __ cmpl(r12, Deoptimization::Unpack_exception); // Was exception pending? | |
| 2695 __ jcc(Assembler::notEqual, noException); | |
| 2696 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); | |
| 2697 // QQQ this is useless it was NULL above | |
| 2698 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); | |
| 2699 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD); | |
| 2700 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD); | |
| 2701 | |
| 2702 __ verify_oop(rax); | |
| 2703 | |
| 2704 // Overwrite the result registers with the exception results. | |
| 2705 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); | |
| 2706 // I think this is useless | |
| 2707 __ movptr(Address(rsp, RegisterSaver::rdx_offset_in_bytes()), rdx); | |
| 2708 | |
| 2709 __ bind(noException); | |
| 0 | 2710 |
| 2711 // Only register save data is on the stack. | |
| 2712 // Now restore the result registers. Everything else is either dead | |
| 2713 // or captured in the vframeArray. | |
| 2714 RegisterSaver::restore_result_registers(masm); | |
| 2715 | |
| 2716 // All of the register save area has been popped of the stack. Only the | |
| 2717 // return address remains. | |
| 2718 | |
| 2719 // Pop all the frames we must move/replace. | |
| 2720 // | |
| 2721 // Frame picture (youngest to oldest) | |
| 2722 // 1: self-frame (no frame link) | |
| 2723 // 2: deopting frame (no frame link) | |
| 2724 // 3: caller of deopting frame (could be compiled/interpreted). | |
| 2725 // | |
| 2726 // Note: by leaving the return address of self-frame on the stack | |
| 2727 // and using the size of frame 2 to adjust the stack | |
| 2728 // when we are done the return to frame 3 will still be on the stack. | |
| 2729 | |
| 2730 // Pop deoptimized frame | |
| 2731 __ movl(rcx, Address(rdi, Deoptimization::UnrollBlock::size_of_deoptimized_frame_offset_in_bytes())); | |
| 304 | 2732 __ addptr(rsp, rcx); |
| 0 | 2733 |
| 2734 // rsp should be pointing at the return address to the caller (3) | |
| 2735 | |
| 2736 // Stack bang to make sure there's enough room for these interpreter frames. | |
| 2737 if (UseStackBanging) { | |
| 2738 __ movl(rbx, Address(rdi, Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); | |
| 2739 __ bang_stack_size(rbx, rcx); | |
| 2740 } | |
| 2741 | |
| 2742 // Load address of array of frame pcs into rcx | |
| 304 | 2743 __ movptr(rcx, Address(rdi, Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); |
| 0 | 2744 |
| 2745 // Trash the old pc | |
| 304 | 2746 __ addptr(rsp, wordSize); |
| 0 | 2747 |
| 2748 // Load address of array of frame sizes into rsi | |
| 304 | 2749 __ movptr(rsi, Address(rdi, Deoptimization::UnrollBlock::frame_sizes_offset_in_bytes())); |
| 0 | 2750 |
| 2751 // Load counter into rdx | |
| 2752 __ movl(rdx, Address(rdi, Deoptimization::UnrollBlock::number_of_frames_offset_in_bytes())); | |
| 2753 | |
| 2754 // Pick up the initial fp we should save | |
| 304 | 2755 __ movptr(rbp, Address(rdi, Deoptimization::UnrollBlock::initial_fp_offset_in_bytes())); |
| 0 | 2756 |
| 2757 // Now adjust the caller's stack to make up for the extra locals | |
| 2758 // but record the original sp so that we can save it in the skeletal interpreter | |
| 2759 // frame and the stack walking of interpreter_sender will get the unextended sp | |
| 2760 // value and not the "real" sp value. | |
| 2761 | |
| 2762 const Register sender_sp = r8; | |
| 2763 | |
| 304 | 2764 __ mov(sender_sp, rsp); |
| 0 | 2765 __ movl(rbx, Address(rdi, |
| 2766 Deoptimization::UnrollBlock:: | |
| 2767 caller_adjustment_offset_in_bytes())); | |
| 304 | 2768 __ subptr(rsp, rbx); |
| 0 | 2769 |
| 2770 // Push interpreter frames in a loop | |
| 2771 Label loop; | |
| 2772 __ bind(loop); | |
| 304 | 2773 __ movptr(rbx, Address(rsi, 0)); // Load frame size |
| 2774 #ifdef CC_INTERP | |
| 2775 __ subptr(rbx, 4*wordSize); // we'll push pc and ebp by hand and | |
| 2776 #ifdef ASSERT | |
| 2777 __ push(0xDEADDEAD); // Make a recognizable pattern | |
| 2778 __ push(0xDEADDEAD); | |
| 2779 #else /* ASSERT */ | |
| 2780 __ subptr(rsp, 2*wordSize); // skip the "static long no_param" | |
| 2781 #endif /* ASSERT */ | |
| 2782 #else | |
| 2783 __ subptr(rbx, 2*wordSize); // We'll push pc and ebp by hand | |
| 2784 #endif // CC_INTERP | |
| 2785 __ pushptr(Address(rcx, 0)); // Save return address | |
| 0 | 2786 __ enter(); // Save old & set new ebp |
| 304 | 2787 __ subptr(rsp, rbx); // Prolog |
| 2788 #ifdef CC_INTERP | |
| 2789 __ movptr(Address(rbp, | |
| 2790 -(sizeof(BytecodeInterpreter)) + in_bytes(byte_offset_of(BytecodeInterpreter, _sender_sp))), | |
| 2791 sender_sp); // Make it walkable | |
| 2792 #else /* CC_INTERP */ | |
| 0 | 2793 // This value is corrected by layout_activation_impl |
| 304 | 2794 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD ); |
| 2795 __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), sender_sp); // Make it walkable | |
| 2796 #endif /* CC_INTERP */ | |
| 2797 __ mov(sender_sp, rsp); // Pass sender_sp to next frame | |
| 2798 __ addptr(rsi, wordSize); // Bump array pointer (sizes) | |
| 2799 __ addptr(rcx, wordSize); // Bump array pointer (pcs) | |
| 0 | 2800 __ decrementl(rdx); // Decrement counter |
| 2801 __ jcc(Assembler::notZero, loop); | |
| 304 | 2802 __ pushptr(Address(rcx, 0)); // Save final return address |
| 0 | 2803 |
| 2804 // Re-push self-frame | |
| 2805 __ enter(); // Save old & set new ebp | |
| 2806 | |
| 2807 // Allocate a full sized register save area. | |
| 2808 // Return address and rbp are in place, so we allocate two less words. | |
| 304 | 2809 __ subptr(rsp, (frame_size_in_words - 2) * wordSize); |
| 0 | 2810 |
| 2811 // Restore frame locals after moving the frame | |
| 2812 __ movdbl(Address(rsp, RegisterSaver::xmm0_offset_in_bytes()), xmm0); | |
| 304 | 2813 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); |
| 0 | 2814 |
| 2815 // Call C code. Need thread but NOT official VM entry | |
| 2816 // crud. We cannot block on this call, no GC can happen. Call should | |
| 2817 // restore return values to their stack-slots with the new SP. | |
| 2818 // | |
| 2819 // void Deoptimization::unpack_frames(JavaThread* thread, int exec_mode) | |
| 2820 | |
| 2821 // Use rbp because the frames look interpreted now | |
| 2822 __ set_last_Java_frame(noreg, rbp, NULL); | |
| 2823 | |
| 304 | 2824 __ mov(c_rarg0, r15_thread); |
|
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2825 __ movl(c_rarg1, r14); // second arg: exec_mode |
| 0 | 2826 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); |
| 2827 | |
| 2828 // Set an oopmap for the call site | |
| 2829 oop_maps->add_gc_map(__ pc() - start, | |
| 2830 new OopMap( frame_size_in_words, 0 )); | |
| 2831 | |
| 2832 __ reset_last_Java_frame(true, false); | |
| 2833 | |
| 2834 // Collect return values | |
| 2835 __ movdbl(xmm0, Address(rsp, RegisterSaver::xmm0_offset_in_bytes())); | |
| 304 | 2836 __ movptr(rax, Address(rsp, RegisterSaver::rax_offset_in_bytes())); |
| 2837 // I think this is useless (throwing pc?) | |
| 2838 __ movptr(rdx, Address(rsp, RegisterSaver::rdx_offset_in_bytes())); | |
| 0 | 2839 |
| 2840 // Pop self-frame. | |
| 2841 __ leave(); // Epilog | |
| 2842 | |
| 2843 // Jump to interpreter | |
| 2844 __ ret(0); | |
| 2845 | |
| 2846 // Make sure all code is generated | |
| 2847 masm->flush(); | |
| 2848 | |
| 304 | 2849 _deopt_blob = DeoptimizationBlob::create(&buffer, oop_maps, 0, exception_offset, reexecute_offset, frame_size_in_words); |
| 2850 _deopt_blob->set_unpack_with_exception_in_tls_offset(exception_in_tls_offset); | |
| 0 | 2851 } |
| 2852 | |
| 2853 #ifdef COMPILER2 | |
| 2854 //------------------------------generate_uncommon_trap_blob-------------------- | |
| 2855 void SharedRuntime::generate_uncommon_trap_blob() { | |
| 2856 // Allocate space for the code | |
| 2857 ResourceMark rm; | |
| 2858 // Setup code generation tools | |
| 2859 CodeBuffer buffer("uncommon_trap_blob", 2048, 1024); | |
| 2860 MacroAssembler* masm = new MacroAssembler(&buffer); | |
| 2861 | |
| 2862 assert(SimpleRuntimeFrame::framesize % 4 == 0, "sp not 16-byte aligned"); | |
| 2863 | |
| 2864 address start = __ pc(); | |
| 2865 | |
| 2866 // Push self-frame. We get here with a return address on the | |
| 2867 // stack, so rsp is 8-byte aligned until we allocate our frame. | |
| 304 | 2868 __ subptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Epilog! |
| 0 | 2869 |
| 2870 // No callee saved registers. rbp is assumed implicitly saved | |
| 304 | 2871 __ movptr(Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt), rbp); |
| 0 | 2872 |
| 2873 // compiler left unloaded_class_index in j_rarg0 move to where the | |
| 2874 // runtime expects it. | |
| 2875 __ movl(c_rarg1, j_rarg0); | |
| 2876 | |
| 2877 __ set_last_Java_frame(noreg, noreg, NULL); | |
| 2878 | |
| 2879 // Call C code. Need thread but NOT official VM entry | |
| 2880 // crud. We cannot block on this call, no GC can happen. Call should | |
| 2881 // capture callee-saved registers as well as return values. | |
| 2882 // Thread is in rdi already. | |
| 2883 // | |
| 2884 // UnrollBlock* uncommon_trap(JavaThread* thread, jint unloaded_class_index); | |
| 2885 | |
| 304 | 2886 __ mov(c_rarg0, r15_thread); |
| 0 | 2887 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap))); |
| 2888 | |
| 2889 // Set an oopmap for the call site | |
| 2890 OopMapSet* oop_maps = new OopMapSet(); | |
| 2891 OopMap* map = new OopMap(SimpleRuntimeFrame::framesize, 0); | |
| 2892 | |
| 2893 // location of rbp is known implicitly by the frame sender code | |
| 2894 | |
| 2895 oop_maps->add_gc_map(__ pc() - start, map); | |
| 2896 | |
| 2897 __ reset_last_Java_frame(false, false); | |
| 2898 | |
| 2899 // Load UnrollBlock* into rdi | |
| 304 | 2900 __ mov(rdi, rax); |
| 0 | 2901 |
| 2902 // Pop all the frames we must move/replace. | |
| 2903 // | |
| 2904 // Frame picture (youngest to oldest) | |
| 2905 // 1: self-frame (no frame link) | |
| 2906 // 2: deopting frame (no frame link) | |
| 2907 // 3: caller of deopting frame (could be compiled/interpreted). | |
| 2908 | |
| 2909 // Pop self-frame. We have no frame, and must rely only on rax and rsp. | |
| 304 | 2910 __ addptr(rsp, (SimpleRuntimeFrame::framesize - 2) << LogBytesPerInt); // Epilog! |
| 0 | 2911 |
| 2912 // Pop deoptimized frame (int) | |
| 2913 __ movl(rcx, Address(rdi, | |
| 2914 Deoptimization::UnrollBlock:: | |
| 2915 size_of_deoptimized_frame_offset_in_bytes())); | |
| 304 | 2916 __ addptr(rsp, rcx); |
| 0 | 2917 |
| 2918 // rsp should be pointing at the return address to the caller (3) | |
| 2919 | |
| 2920 // Stack bang to make sure there's enough room for these interpreter frames. | |
| 2921 if (UseStackBanging) { | |
| 2922 __ movl(rbx, Address(rdi ,Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); | |
| 2923 __ bang_stack_size(rbx, rcx); | |
| 2924 } | |
| 2925 | |
| 2926 // Load address of array of frame pcs into rcx (address*) | |
| 304 | 2927 __ movptr(rcx, |
| 2928 Address(rdi, | |
| 2929 Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); | |
| 0 | 2930 |
| 2931 // Trash the return pc | |
| 304 | 2932 __ addptr(rsp, wordSize); |
| 0 | 2933 |
| 2934 // Load address of array of frame sizes into rsi (intptr_t*) | |
| 304 | 2935 __ movptr(rsi, Address(rdi, |
| 2936 Deoptimization::UnrollBlock:: | |
| 2937 frame_sizes_offset_in_bytes())); | |
| 0 | 2938 |
| 2939 // Counter | |
| 2940 __ movl(rdx, Address(rdi, | |
| 2941 Deoptimization::UnrollBlock:: | |
| 2942 number_of_frames_offset_in_bytes())); // (int) | |
| 2943 | |
| 2944 // Pick up the initial fp we should save | |
| 304 | 2945 __ movptr(rbp, |
| 2946 Address(rdi, | |
| 2947 Deoptimization::UnrollBlock::initial_fp_offset_in_bytes())); | |
| 0 | 2948 |
| 2949 // Now adjust the caller's stack to make up for the extra locals but | |
| 2950 // record the original sp so that we can save it in the skeletal | |
| 2951 // interpreter frame and the stack walking of interpreter_sender | |
| 2952 // will get the unextended sp value and not the "real" sp value. | |
| 2953 | |
| 2954 const Register sender_sp = r8; | |
| 2955 | |
| 304 | 2956 __ mov(sender_sp, rsp); |
| 0 | 2957 __ movl(rbx, Address(rdi, |
| 2958 Deoptimization::UnrollBlock:: | |
| 2959 caller_adjustment_offset_in_bytes())); // (int) | |
| 304 | 2960 __ subptr(rsp, rbx); |
| 0 | 2961 |
| 2962 // Push interpreter frames in a loop | |
| 2963 Label loop; | |
| 2964 __ bind(loop); | |
| 304 | 2965 __ movptr(rbx, Address(rsi, 0)); // Load frame size |
| 2966 __ subptr(rbx, 2 * wordSize); // We'll push pc and rbp by hand | |
| 2967 __ pushptr(Address(rcx, 0)); // Save return address | |
| 2968 __ enter(); // Save old & set new rbp | |
| 2969 __ subptr(rsp, rbx); // Prolog | |
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2970 #ifdef CC_INTERP |
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2971 __ movptr(Address(rbp, |
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2972 -(sizeof(BytecodeInterpreter)) + in_bytes(byte_offset_of(BytecodeInterpreter, _sender_sp))), |
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2973 sender_sp); // Make it walkable |
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2974 #else // CC_INTERP |
| 304 | 2975 __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), |
| 2976 sender_sp); // Make it walkable | |
| 0 | 2977 // This value is corrected by layout_activation_impl |
| 304 | 2978 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD ); |
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2979 #endif // CC_INTERP |
| 304 | 2980 __ mov(sender_sp, rsp); // Pass sender_sp to next frame |
| 2981 __ addptr(rsi, wordSize); // Bump array pointer (sizes) | |
| 2982 __ addptr(rcx, wordSize); // Bump array pointer (pcs) | |
| 2983 __ decrementl(rdx); // Decrement counter | |
| 0 | 2984 __ jcc(Assembler::notZero, loop); |
| 304 | 2985 __ pushptr(Address(rcx, 0)); // Save final return address |
| 0 | 2986 |
| 2987 // Re-push self-frame | |
| 2988 __ enter(); // Save old & set new rbp | |
| 304 | 2989 __ subptr(rsp, (SimpleRuntimeFrame::framesize - 4) << LogBytesPerInt); |
| 0 | 2990 // Prolog |
| 2991 | |
| 2992 // Use rbp because the frames look interpreted now | |
| 2993 __ set_last_Java_frame(noreg, rbp, NULL); | |
| 2994 | |
| 2995 // Call C code. Need thread but NOT official VM entry | |
| 2996 // crud. We cannot block on this call, no GC can happen. Call should | |
| 2997 // restore return values to their stack-slots with the new SP. | |
| 2998 // Thread is in rdi already. | |
| 2999 // | |
| 3000 // BasicType unpack_frames(JavaThread* thread, int exec_mode); | |
| 3001 | |
| 304 | 3002 __ mov(c_rarg0, r15_thread); |
| 0 | 3003 __ movl(c_rarg1, Deoptimization::Unpack_uncommon_trap); |
| 3004 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); | |
| 3005 | |
| 3006 // Set an oopmap for the call site | |
| 3007 oop_maps->add_gc_map(__ pc() - start, new OopMap(SimpleRuntimeFrame::framesize, 0)); | |
| 3008 | |
| 3009 __ reset_last_Java_frame(true, false); | |
| 3010 | |
| 3011 // Pop self-frame. | |
| 3012 __ leave(); // Epilog | |
| 3013 | |
| 3014 // Jump to interpreter | |
| 3015 __ ret(0); | |
| 3016 | |
| 3017 // Make sure all code is generated | |
| 3018 masm->flush(); | |
| 3019 | |
| 3020 _uncommon_trap_blob = UncommonTrapBlob::create(&buffer, oop_maps, | |
| 3021 SimpleRuntimeFrame::framesize >> 1); | |
| 3022 } | |
| 3023 #endif // COMPILER2 | |
| 3024 | |
| 3025 | |
| 3026 //------------------------------generate_handler_blob------ | |
| 3027 // | |
| 3028 // Generate a special Compile2Runtime blob that saves all registers, | |
| 3029 // and setup oopmap. | |
| 3030 // | |
| 3031 static SafepointBlob* generate_handler_blob(address call_ptr, bool cause_return) { | |
| 3032 assert(StubRoutines::forward_exception_entry() != NULL, | |
| 3033 "must be generated before"); | |
| 3034 | |
| 3035 ResourceMark rm; | |
| 3036 OopMapSet *oop_maps = new OopMapSet(); | |
| 3037 OopMap* map; | |
| 3038 | |
| 3039 // Allocate space for the code. Setup code generation tools. | |
| 3040 CodeBuffer buffer("handler_blob", 2048, 1024); | |
| 3041 MacroAssembler* masm = new MacroAssembler(&buffer); | |
| 3042 | |
| 3043 address start = __ pc(); | |
| 3044 address call_pc = NULL; | |
| 3045 int frame_size_in_words; | |
| 3046 | |
| 3047 // Make room for return address (or push it again) | |
| 3048 if (!cause_return) { | |
| 304 | 3049 __ push(rbx); |
| 0 | 3050 } |
| 3051 | |
| 3052 // Save registers, fpu state, and flags | |
| 3053 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
| 3054 | |
| 3055 // The following is basically a call_VM. However, we need the precise | |
| 3056 // address of the call in order to generate an oopmap. Hence, we do all the | |
| 3057 // work outselves. | |
| 3058 | |
| 3059 __ set_last_Java_frame(noreg, noreg, NULL); | |
| 3060 | |
| 3061 // The return address must always be correct so that frame constructor never | |
| 3062 // sees an invalid pc. | |
| 3063 | |
| 3064 if (!cause_return) { | |
| 3065 // overwrite the dummy value we pushed on entry | |
| 304 | 3066 __ movptr(c_rarg0, Address(r15_thread, JavaThread::saved_exception_pc_offset())); |
| 3067 __ movptr(Address(rbp, wordSize), c_rarg0); | |
| 0 | 3068 } |
| 3069 | |
| 3070 // Do the call | |
| 304 | 3071 __ mov(c_rarg0, r15_thread); |
| 0 | 3072 __ call(RuntimeAddress(call_ptr)); |
| 3073 | |
| 3074 // Set an oopmap for the call site. This oopmap will map all | |
| 3075 // oop-registers and debug-info registers as callee-saved. This | |
| 3076 // will allow deoptimization at this safepoint to find all possible | |
| 3077 // debug-info recordings, as well as let GC find all oops. | |
| 3078 | |
| 3079 oop_maps->add_gc_map( __ pc() - start, map); | |
| 3080 | |
| 3081 Label noException; | |
| 3082 | |
| 3083 __ reset_last_Java_frame(false, false); | |
| 3084 | |
| 304 | 3085 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
| 0 | 3086 __ jcc(Assembler::equal, noException); |
| 3087 | |
| 3088 // Exception pending | |
| 3089 | |
| 3090 RegisterSaver::restore_live_registers(masm); | |
| 3091 | |
| 3092 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
| 3093 | |
| 3094 // No exception case | |
| 3095 __ bind(noException); | |
| 3096 | |
| 3097 // Normal exit, restore registers and exit. | |
| 3098 RegisterSaver::restore_live_registers(masm); | |
| 3099 | |
| 3100 __ ret(0); | |
| 3101 | |
| 3102 // Make sure all code is generated | |
| 3103 masm->flush(); | |
| 3104 | |
| 3105 // Fill-out other meta info | |
| 3106 return SafepointBlob::create(&buffer, oop_maps, frame_size_in_words); | |
| 3107 } | |
| 3108 | |
| 3109 // | |
| 3110 // generate_resolve_blob - call resolution (static/virtual/opt-virtual/ic-miss | |
| 3111 // | |
| 3112 // Generate a stub that calls into vm to find out the proper destination | |
| 3113 // of a java call. All the argument registers are live at this point | |
| 3114 // but since this is generic code we don't know what they are and the caller | |
| 3115 // must do any gc of the args. | |
| 3116 // | |
| 3117 static RuntimeStub* generate_resolve_blob(address destination, const char* name) { | |
| 3118 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); | |
| 3119 | |
| 3120 // allocate space for the code | |
| 3121 ResourceMark rm; | |
| 3122 | |
| 3123 CodeBuffer buffer(name, 1000, 512); | |
| 3124 MacroAssembler* masm = new MacroAssembler(&buffer); | |
| 3125 | |
| 3126 int frame_size_in_words; | |
| 3127 | |
| 3128 OopMapSet *oop_maps = new OopMapSet(); | |
| 3129 OopMap* map = NULL; | |
| 3130 | |
| 3131 int start = __ offset(); | |
| 3132 | |
| 3133 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
| 3134 | |
| 3135 int frame_complete = __ offset(); | |
| 3136 | |
| 3137 __ set_last_Java_frame(noreg, noreg, NULL); | |
| 3138 | |
| 304 | 3139 __ mov(c_rarg0, r15_thread); |
| 0 | 3140 |
| 3141 __ call(RuntimeAddress(destination)); | |
| 3142 | |
| 3143 | |
| 3144 // Set an oopmap for the call site. | |
| 3145 // We need this not only for callee-saved registers, but also for volatile | |
| 3146 // registers that the compiler might be keeping live across a safepoint. | |
| 3147 | |
| 3148 oop_maps->add_gc_map( __ offset() - start, map); | |
| 3149 | |
| 3150 // rax contains the address we are going to jump to assuming no exception got installed | |
| 3151 | |
| 3152 // clear last_Java_sp | |
| 3153 __ reset_last_Java_frame(false, false); | |
| 3154 // check for pending exceptions | |
| 3155 Label pending; | |
| 304 | 3156 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
| 0 | 3157 __ jcc(Assembler::notEqual, pending); |
| 3158 | |
| 3159 // get the returned methodOop | |
| 304 | 3160 __ movptr(rbx, Address(r15_thread, JavaThread::vm_result_offset())); |
| 3161 __ movptr(Address(rsp, RegisterSaver::rbx_offset_in_bytes()), rbx); | |
| 3162 | |
| 3163 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); | |
| 0 | 3164 |
| 3165 RegisterSaver::restore_live_registers(masm); | |
| 3166 | |
| 3167 // We are back the the original state on entry and ready to go. | |
| 3168 | |
| 3169 __ jmp(rax); | |
| 3170 | |
| 3171 // Pending exception after the safepoint | |
| 3172 | |
| 3173 __ bind(pending); | |
| 3174 | |
| 3175 RegisterSaver::restore_live_registers(masm); | |
| 3176 | |
| 3177 // exception pending => remove activation and forward to exception handler | |
| 3178 | |
| 3179 __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), (int)NULL_WORD); | |
| 3180 | |
| 304 | 3181 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset())); |
| 0 | 3182 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
| 3183 | |
| 3184 // ------------- | |
| 3185 // make sure all code is generated | |
| 3186 masm->flush(); | |
| 3187 | |
| 3188 // return the blob | |
| 3189 // frame_size_words or bytes?? | |
| 3190 return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_in_words, oop_maps, true); | |
| 3191 } | |
| 3192 | |
| 3193 | |
| 3194 void SharedRuntime::generate_stubs() { | |
| 3195 | |
| 3196 _wrong_method_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method), | |
| 3197 "wrong_method_stub"); | |
| 3198 _ic_miss_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_ic_miss), | |
| 3199 "ic_miss_stub"); | |
| 3200 _resolve_opt_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_opt_virtual_call_C), | |
| 3201 "resolve_opt_virtual_call"); | |
| 3202 | |
| 3203 _resolve_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_virtual_call_C), | |
| 3204 "resolve_virtual_call"); | |
| 3205 | |
| 3206 _resolve_static_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_static_call_C), | |
| 3207 "resolve_static_call"); | |
| 3208 _polling_page_safepoint_handler_blob = | |
| 3209 generate_handler_blob(CAST_FROM_FN_PTR(address, | |
| 3210 SafepointSynchronize::handle_polling_page_exception), false); | |
| 3211 | |
| 3212 _polling_page_return_handler_blob = | |
| 3213 generate_handler_blob(CAST_FROM_FN_PTR(address, | |
| 3214 SafepointSynchronize::handle_polling_page_exception), true); | |
| 3215 | |
| 3216 generate_deopt_blob(); | |
| 3217 | |
| 3218 #ifdef COMPILER2 | |
| 3219 generate_uncommon_trap_blob(); | |
| 3220 #endif // COMPILER2 | |
| 3221 } | |
| 3222 | |
| 3223 | |
| 3224 #ifdef COMPILER2 | |
| 3225 // This is here instead of runtime_x86_64.cpp because it uses SimpleRuntimeFrame | |
| 3226 // | |
| 3227 //------------------------------generate_exception_blob--------------------------- | |
| 3228 // creates exception blob at the end | |
| 3229 // Using exception blob, this code is jumped from a compiled method. | |
| 3230 // (see emit_exception_handler in x86_64.ad file) | |
| 3231 // | |
| 3232 // Given an exception pc at a call we call into the runtime for the | |
| 3233 // handler in this method. This handler might merely restore state | |
| 3234 // (i.e. callee save registers) unwind the frame and jump to the | |
| 3235 // exception handler for the nmethod if there is no Java level handler | |
| 3236 // for the nmethod. | |
| 3237 // | |
| 3238 // This code is entered with a jmp. | |
| 3239 // | |
| 3240 // Arguments: | |
| 3241 // rax: exception oop | |
| 3242 // rdx: exception pc | |
| 3243 // | |
| 3244 // Results: | |
| 3245 // rax: exception oop | |
| 3246 // rdx: exception pc in caller or ??? | |
| 3247 // destination: exception handler of caller | |
| 3248 // | |
| 3249 // Note: the exception pc MUST be at a call (precise debug information) | |
| 3250 // Registers rax, rdx, rcx, rsi, rdi, r8-r11 are not callee saved. | |
| 3251 // | |
| 3252 | |
| 3253 void OptoRuntime::generate_exception_blob() { | |
| 3254 assert(!OptoRuntime::is_callee_saved_register(RDX_num), ""); | |
| 3255 assert(!OptoRuntime::is_callee_saved_register(RAX_num), ""); | |
| 3256 assert(!OptoRuntime::is_callee_saved_register(RCX_num), ""); | |
| 3257 | |
| 3258 assert(SimpleRuntimeFrame::framesize % 4 == 0, "sp not 16-byte aligned"); | |
| 3259 | |
| 3260 // Allocate space for the code | |
| 3261 ResourceMark rm; | |
| 3262 // Setup code generation tools | |
| 3263 CodeBuffer buffer("exception_blob", 2048, 1024); | |
| 3264 MacroAssembler* masm = new MacroAssembler(&buffer); | |
| 3265 | |
| 3266 | |
| 3267 address start = __ pc(); | |
| 3268 | |
| 3269 // Exception pc is 'return address' for stack walker | |
| 304 | 3270 __ push(rdx); |
| 3271 __ subptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Prolog | |
| 0 | 3272 |
| 3273 // Save callee-saved registers. See x86_64.ad. | |
| 3274 | |
| 3275 // rbp is an implicitly saved callee saved register (i.e. the calling | |
| 3276 // convention will save restore it in prolog/epilog) Other than that | |
| 3277 // there are no callee save registers now that adapter frames are gone. | |
| 3278 | |
| 304 | 3279 __ movptr(Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt), rbp); |
| 0 | 3280 |
| 3281 // Store exception in Thread object. We cannot pass any arguments to the | |
| 3282 // handle_exception call, since we do not want to make any assumption | |
| 3283 // about the size of the frame where the exception happened in. | |
| 3284 // c_rarg0 is either rdi (Linux) or rcx (Windows). | |
| 304 | 3285 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()),rax); |
| 3286 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), rdx); | |
| 0 | 3287 |
| 3288 // This call does all the hard work. It checks if an exception handler | |
| 3289 // exists in the method. | |
| 3290 // If so, it returns the handler address. | |
| 3291 // If not, it prepares for stack-unwinding, restoring the callee-save | |
| 3292 // registers of the frame being removed. | |
| 3293 // | |
| 3294 // address OptoRuntime::handle_exception_C(JavaThread* thread) | |
| 3295 | |
| 3296 __ set_last_Java_frame(noreg, noreg, NULL); | |
| 304 | 3297 __ mov(c_rarg0, r15_thread); |
| 0 | 3298 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, OptoRuntime::handle_exception_C))); |
| 3299 | |
| 3300 // Set an oopmap for the call site. This oopmap will only be used if we | |
| 3301 // are unwinding the stack. Hence, all locations will be dead. | |
| 3302 // Callee-saved registers will be the same as the frame above (i.e., | |
| 3303 // handle_exception_stub), since they were restored when we got the | |
| 3304 // exception. | |
| 3305 | |
| 3306 OopMapSet* oop_maps = new OopMapSet(); | |
| 3307 | |
| 3308 oop_maps->add_gc_map( __ pc()-start, new OopMap(SimpleRuntimeFrame::framesize, 0)); | |
| 3309 | |
| 3310 __ reset_last_Java_frame(false, false); | |
| 3311 | |
| 3312 // Restore callee-saved registers | |
| 3313 | |
| 3314 // rbp is an implicitly saved callee saved register (i.e. the calling | |
| 3315 // convention will save restore it in prolog/epilog) Other than that | |
| 3316 // there are no callee save registers no that adapter frames are gone. | |
| 3317 | |
| 304 | 3318 __ movptr(rbp, Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt)); |
| 3319 | |
| 3320 __ addptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Epilog | |
| 3321 __ pop(rdx); // No need for exception pc anymore | |
| 0 | 3322 |
| 3323 // rax: exception handler | |
| 3324 | |
| 3325 // We have a handler in rax (could be deopt blob). | |
| 304 | 3326 __ mov(r8, rax); |
| 0 | 3327 |
| 3328 // Get the exception oop | |
| 304 | 3329 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); |
| 0 | 3330 // Get the exception pc in case we are deoptimized |
| 304 | 3331 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); |
| 0 | 3332 #ifdef ASSERT |
| 3333 __ movptr(Address(r15_thread, JavaThread::exception_handler_pc_offset()), (int)NULL_WORD); | |
| 3334 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int)NULL_WORD); | |
| 3335 #endif | |
| 3336 // Clear the exception oop so GC no longer processes it as a root. | |
| 3337 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), (int)NULL_WORD); | |
| 3338 | |
| 3339 // rax: exception oop | |
| 3340 // r8: exception handler | |
| 3341 // rdx: exception pc | |
| 3342 // Jump to handler | |
| 3343 | |
| 3344 __ jmp(r8); | |
| 3345 | |
| 3346 // Make sure all code is generated | |
| 3347 masm->flush(); | |
| 3348 | |
| 3349 // Set exception blob | |
| 3350 _exception_blob = ExceptionBlob::create(&buffer, oop_maps, SimpleRuntimeFrame::framesize >> 1); | |
| 3351 } | |
| 3352 #endif // COMPILER2 |