Mercurial > hg > truffle
annotate src/share/vm/c1/c1_FrameMap.cpp @ 17795:a9becfeecd1b
Merge
| author | kvn |
|---|---|
| date | Wed, 22 Jan 2014 17:42:23 -0800 |
| parents | 55fb97c4c58d 6a936747b569 |
| children | 4ca6dc0799b6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "c1/c1_FrameMap.hpp" | |
| 27 #include "c1/c1_LIR.hpp" | |
| 28 #include "runtime/sharedRuntime.hpp" | |
| 29 #ifdef TARGET_ARCH_x86 | |
| 30 # include "vmreg_x86.inline.hpp" | |
| 31 #endif | |
| 32 #ifdef TARGET_ARCH_sparc | |
| 33 # include "vmreg_sparc.inline.hpp" | |
| 34 #endif | |
| 35 #ifdef TARGET_ARCH_zero | |
| 36 # include "vmreg_zero.inline.hpp" | |
| 37 #endif | |
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38 #ifdef TARGET_ARCH_arm |
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39 # include "vmreg_arm.inline.hpp" |
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40 #endif |
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41 #ifdef TARGET_ARCH_ppc |
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42 # include "vmreg_ppc.inline.hpp" |
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43 #endif |
| 0 | 44 |
| 45 | |
| 46 | |
| 47 //----------------------------------------------------- | |
| 48 | |
| 49 // Convert method signature into an array of BasicTypes for the arguments | |
| 50 BasicTypeArray* FrameMap::signature_type_array_for(const ciMethod* method) { | |
| 51 ciSignature* sig = method->signature(); | |
| 52 BasicTypeList* sta = new BasicTypeList(method->arg_size()); | |
| 53 // add receiver, if any | |
| 54 if (!method->is_static()) sta->append(T_OBJECT); | |
| 55 // add remaining arguments | |
| 56 for (int i = 0; i < sig->count(); i++) { | |
| 57 ciType* type = sig->type_at(i); | |
| 58 BasicType t = type->basic_type(); | |
| 59 if (t == T_ARRAY) { | |
| 60 t = T_OBJECT; | |
| 61 } | |
| 62 sta->append(t); | |
| 63 } | |
| 64 // done | |
| 65 return sta; | |
| 66 } | |
| 67 | |
| 68 | |
| 69 CallingConvention* FrameMap::java_calling_convention(const BasicTypeArray* signature, bool outgoing) { | |
| 70 // compute the size of the arguments first. The signature array | |
| 71 // that java_calling_convention takes includes a T_VOID after double | |
| 72 // work items but our signatures do not. | |
| 73 int i; | |
| 74 int sizeargs = 0; | |
| 75 for (i = 0; i < signature->length(); i++) { | |
| 76 sizeargs += type2size[signature->at(i)]; | |
| 77 } | |
| 78 | |
| 79 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); | |
| 80 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); | |
| 81 int sig_index = 0; | |
| 82 for (i = 0; i < sizeargs; i++, sig_index++) { | |
| 83 sig_bt[i] = signature->at(sig_index); | |
| 84 if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
| 85 sig_bt[i + 1] = T_VOID; | |
| 86 i++; | |
| 87 } | |
| 88 } | |
| 89 | |
| 90 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, outgoing); | |
| 91 LIR_OprList* args = new LIR_OprList(signature->length()); | |
| 92 for (i = 0; i < sizeargs;) { | |
| 93 BasicType t = sig_bt[i]; | |
| 94 assert(t != T_VOID, "should be skipping these"); | |
| 95 LIR_Opr opr = map_to_opr(t, regs + i, outgoing); | |
| 96 args->append(opr); | |
| 97 if (opr->is_address()) { | |
| 98 LIR_Address* addr = opr->as_address_ptr(); | |
| 99 assert(addr->disp() == (int)addr->disp(), "out of range value"); | |
| 2093 | 100 out_preserve = MAX2(out_preserve, (intptr_t)(addr->disp() - STACK_BIAS) / 4); |
| 0 | 101 } |
| 102 i += type2size[t]; | |
| 103 } | |
| 104 assert(args->length() == signature->length(), "size mismatch"); | |
| 105 out_preserve += SharedRuntime::out_preserve_stack_slots(); | |
| 106 | |
| 107 if (outgoing) { | |
| 108 // update the space reserved for arguments. | |
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109 update_reserved_argument_area_size(out_preserve * BytesPerWord); |
| 0 | 110 } |
| 111 return new CallingConvention(args, out_preserve); | |
| 112 } | |
| 113 | |
| 114 | |
| 115 CallingConvention* FrameMap::c_calling_convention(const BasicTypeArray* signature) { | |
| 116 // compute the size of the arguments first. The signature array | |
| 117 // that java_calling_convention takes includes a T_VOID after double | |
| 118 // work items but our signatures do not. | |
| 119 int i; | |
| 120 int sizeargs = 0; | |
| 121 for (i = 0; i < signature->length(); i++) { | |
| 122 sizeargs += type2size[signature->at(i)]; | |
| 123 } | |
| 124 | |
| 125 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); | |
| 126 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); | |
| 127 int sig_index = 0; | |
| 128 for (i = 0; i < sizeargs; i++, sig_index++) { | |
| 129 sig_bt[i] = signature->at(sig_index); | |
| 130 if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
| 131 sig_bt[i + 1] = T_VOID; | |
| 132 i++; | |
| 133 } | |
| 134 } | |
| 135 | |
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136 intptr_t out_preserve = SharedRuntime::c_calling_convention(sig_bt, regs, NULL, sizeargs); |
| 0 | 137 LIR_OprList* args = new LIR_OprList(signature->length()); |
| 138 for (i = 0; i < sizeargs;) { | |
| 139 BasicType t = sig_bt[i]; | |
| 140 assert(t != T_VOID, "should be skipping these"); | |
| 141 | |
| 142 // C calls are always outgoing | |
| 143 bool outgoing = true; | |
| 144 LIR_Opr opr = map_to_opr(t, regs + i, outgoing); | |
| 145 // they might be of different types if for instance floating point | |
| 146 // values are passed in cpu registers, but the sizes must match. | |
| 147 assert(type2size[opr->type()] == type2size[t], "type mismatch"); | |
| 148 args->append(opr); | |
| 149 if (opr->is_address()) { | |
| 150 LIR_Address* addr = opr->as_address_ptr(); | |
| 2093 | 151 out_preserve = MAX2(out_preserve, (intptr_t)(addr->disp() - STACK_BIAS) / 4); |
| 0 | 152 } |
| 153 i += type2size[t]; | |
| 154 } | |
| 155 assert(args->length() == signature->length(), "size mismatch"); | |
| 156 out_preserve += SharedRuntime::out_preserve_stack_slots(); | |
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157 update_reserved_argument_area_size(out_preserve * BytesPerWord); |
| 0 | 158 return new CallingConvention(args, out_preserve); |
| 159 } | |
| 160 | |
| 161 | |
| 162 //-------------------------------------------------------- | |
| 163 // FrameMap | |
| 164 //-------------------------------------------------------- | |
| 165 | |
| 166 bool FrameMap::_init_done = false; | |
| 167 Register FrameMap::_cpu_rnr2reg [FrameMap::nof_cpu_regs]; | |
| 168 int FrameMap::_cpu_reg2rnr [FrameMap::nof_cpu_regs]; | |
| 169 | |
| 170 | |
| 171 FrameMap::FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size) { | |
| 1584 | 172 assert(_init_done, "should already be completed"); |
| 0 | 173 |
| 174 _framesize = -1; | |
| 175 _num_spills = -1; | |
| 176 | |
| 177 assert(monitors >= 0, "not set"); | |
| 178 _num_monitors = monitors; | |
| 179 assert(reserved_argument_area_size >= 0, "not set"); | |
| 180 _reserved_argument_area_size = MAX2(4, reserved_argument_area_size) * BytesPerWord; | |
| 181 | |
| 182 _argcount = method->arg_size(); | |
| 183 _argument_locations = new intArray(_argcount, -1); | |
| 184 _incoming_arguments = java_calling_convention(signature_type_array_for(method), false); | |
| 185 _oop_map_arg_count = _incoming_arguments->reserved_stack_slots(); | |
| 186 | |
| 187 int java_index = 0; | |
| 188 for (int i = 0; i < _incoming_arguments->length(); i++) { | |
| 189 LIR_Opr opr = _incoming_arguments->at(i); | |
| 190 if (opr->is_address()) { | |
| 191 LIR_Address* address = opr->as_address_ptr(); | |
| 192 _argument_locations->at_put(java_index, address->disp() - STACK_BIAS); | |
| 193 _incoming_arguments->args()->at_put(i, LIR_OprFact::stack(java_index, as_BasicType(as_ValueType(address->type())))); | |
| 194 } | |
| 195 java_index += type2size[opr->type()]; | |
| 196 } | |
| 197 | |
| 198 } | |
| 199 | |
| 200 | |
| 201 bool FrameMap::finalize_frame(int nof_slots) { | |
| 202 assert(nof_slots >= 0, "must be positive"); | |
| 203 assert(_num_spills == -1, "can only be set once"); | |
| 204 _num_spills = nof_slots; | |
| 205 assert(_framesize == -1, "should only be calculated once"); | |
| 206 _framesize = round_to(in_bytes(sp_offset_for_monitor_base(0)) + | |
| 207 _num_monitors * sizeof(BasicObjectLock) + | |
| 208 sizeof(intptr_t) + // offset of deopt orig pc | |
| 209 frame_pad_in_bytes, | |
| 210 StackAlignmentInBytes) / 4; | |
| 211 int java_index = 0; | |
| 212 for (int i = 0; i < _incoming_arguments->length(); i++) { | |
| 213 LIR_Opr opr = _incoming_arguments->at(i); | |
| 214 if (opr->is_stack()) { | |
| 215 _argument_locations->at_put(java_index, in_bytes(framesize_in_bytes()) + | |
| 216 _argument_locations->at(java_index)); | |
| 217 } | |
| 218 java_index += type2size[opr->type()]; | |
| 219 } | |
| 220 // make sure it's expressible on the platform | |
| 221 return validate_frame(); | |
| 222 } | |
| 223 | |
| 224 VMReg FrameMap::sp_offset2vmreg(ByteSize offset) const { | |
| 225 int offset_in_bytes = in_bytes(offset); | |
| 226 assert(offset_in_bytes % 4 == 0, "must be multiple of 4 bytes"); | |
| 227 assert(offset_in_bytes / 4 < framesize() + oop_map_arg_count(), "out of range"); | |
| 228 return VMRegImpl::stack2reg(offset_in_bytes / 4); | |
| 229 } | |
| 230 | |
| 231 | |
| 232 bool FrameMap::location_for_sp_offset(ByteSize byte_offset_from_sp, | |
| 233 Location::Type loc_type, | |
| 234 Location* loc) const { | |
| 235 int offset = in_bytes(byte_offset_from_sp); | |
| 236 assert(offset >= 0, "incorrect offset"); | |
| 237 if (!Location::legal_offset_in_bytes(offset)) { | |
| 238 return false; | |
| 239 } | |
| 240 Location tmp_loc = Location::new_stk_loc(loc_type, offset); | |
| 241 *loc = tmp_loc; | |
| 242 return true; | |
| 243 } | |
| 244 | |
| 245 | |
| 246 bool FrameMap::locations_for_slot (int index, Location::Type loc_type, | |
| 247 Location* loc, Location* second) const { | |
| 248 ByteSize offset_from_sp = sp_offset_for_slot(index); | |
| 249 if (!location_for_sp_offset(offset_from_sp, loc_type, loc)) { | |
| 250 return false; | |
| 251 } | |
| 252 if (second != NULL) { | |
| 253 // two word item | |
| 254 offset_from_sp = offset_from_sp + in_ByteSize(4); | |
| 255 return location_for_sp_offset(offset_from_sp, loc_type, second); | |
| 256 } | |
| 257 return true; | |
| 258 } | |
| 259 | |
| 260 ////////////////////// | |
| 261 // Public accessors // | |
| 262 ////////////////////// | |
| 263 | |
| 264 | |
| 265 ByteSize FrameMap::sp_offset_for_slot(const int index) const { | |
| 266 if (index < argcount()) { | |
| 267 int offset = _argument_locations->at(index); | |
| 268 assert(offset != -1, "not a memory argument"); | |
| 269 assert(offset >= framesize() * 4, "argument inside of frame"); | |
| 270 return in_ByteSize(offset); | |
| 271 } | |
| 272 ByteSize offset = sp_offset_for_spill(index - argcount()); | |
| 273 assert(in_bytes(offset) < framesize() * 4, "spill outside of frame"); | |
| 274 return offset; | |
| 275 } | |
| 276 | |
| 277 | |
| 278 ByteSize FrameMap::sp_offset_for_double_slot(const int index) const { | |
| 279 ByteSize offset = sp_offset_for_slot(index); | |
| 280 if (index >= argcount()) { | |
| 281 assert(in_bytes(offset) + 4 < framesize() * 4, "spill outside of frame"); | |
| 282 } | |
| 283 return offset; | |
| 284 } | |
| 285 | |
| 286 | |
| 287 ByteSize FrameMap::sp_offset_for_spill(const int index) const { | |
| 288 assert(index >= 0 && index < _num_spills, "out of range"); | |
| 289 int offset = round_to(first_available_sp_in_frame + _reserved_argument_area_size, sizeof(double)) + | |
| 290 index * spill_slot_size_in_bytes; | |
| 291 return in_ByteSize(offset); | |
| 292 } | |
| 293 | |
| 294 ByteSize FrameMap::sp_offset_for_monitor_base(const int index) const { | |
| 295 int end_of_spills = round_to(first_available_sp_in_frame + _reserved_argument_area_size, sizeof(double)) + | |
| 296 _num_spills * spill_slot_size_in_bytes; | |
| 304 | 297 int offset = (int) round_to(end_of_spills, HeapWordSize) + index * sizeof(BasicObjectLock); |
| 0 | 298 return in_ByteSize(offset); |
| 299 } | |
| 300 | |
| 301 ByteSize FrameMap::sp_offset_for_monitor_lock(int index) const { | |
| 302 check_monitor_index(index); | |
| 303 return sp_offset_for_monitor_base(index) + in_ByteSize(BasicObjectLock::lock_offset_in_bytes());; | |
| 304 } | |
| 305 | |
| 306 ByteSize FrameMap::sp_offset_for_monitor_object(int index) const { | |
| 307 check_monitor_index(index); | |
| 308 return sp_offset_for_monitor_base(index) + in_ByteSize(BasicObjectLock::obj_offset_in_bytes()); | |
| 309 } | |
| 310 | |
| 311 | |
| 312 // For OopMaps, map a local variable or spill index to an VMReg. | |
| 313 // This is the offset from sp() in the frame of the slot for the index, | |
| 314 // skewed by SharedInfo::stack0 to indicate a stack location (vs.a register.) | |
| 315 // | |
| 316 // C ABI size + | |
| 317 // framesize + framesize + | |
| 318 // stack0 stack0 stack0 0 <- VMReg->value() | |
| 319 // | | | <registers> | | |
| 320 // ..........|..............|..............|.............| | |
| 321 // 0 1 2 3 | <C ABI area> | 4 5 6 ...... | <- local indices | |
| 322 // ^ ^ sp() | |
| 323 // | | | |
| 324 // arguments non-argument locals | |
| 325 | |
| 326 | |
| 327 VMReg FrameMap::regname(LIR_Opr opr) const { | |
| 328 if (opr->is_single_cpu()) { | |
| 329 assert(!opr->is_virtual(), "should not see virtual registers here"); | |
| 330 return opr->as_register()->as_VMReg(); | |
| 331 } else if (opr->is_single_stack()) { | |
| 332 return sp_offset2vmreg(sp_offset_for_slot(opr->single_stack_ix())); | |
| 333 } else if (opr->is_address()) { | |
| 334 LIR_Address* addr = opr->as_address_ptr(); | |
| 335 assert(addr->base() == stack_pointer(), "sp based addressing only"); | |
| 336 return sp_offset2vmreg(in_ByteSize(addr->index()->as_jint())); | |
| 337 } | |
| 338 ShouldNotReachHere(); | |
| 339 return VMRegImpl::Bad(); | |
| 340 } | |
| 341 | |
| 342 | |
| 343 | |
| 344 | |
| 345 // ------------ extra spill slots --------------- |