1 /* 2 * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "c1/c1_FrameMap.hpp" 27 #include "c1/c1_LIR.hpp" 28 #include "code/vmreg.inline.hpp" 29 #include "runtime/sharedRuntime.hpp" 30 31 //----------------------------------------------------- 32 33 // Convert method signature into an array of BasicTypes for the arguments 34 BasicTypeArray* FrameMap::signature_type_array_for(const ciMethod* method) { 35 ciSignature* sig = method->signature(); 36 BasicTypeList* sta = new BasicTypeList(method->arg_size()); 37 // add receiver, if any 38 if (!method->is_static()) sta->append(T_OBJECT); 39 // add remaining arguments 40 for (int i = 0; i < sig->count(); i++) { 41 ciType* type = sig->type_at(i); 42 BasicType t = type->basic_type(); 43 if (t == T_ARRAY) { 44 t = T_OBJECT; 45 } 46 sta->append(t); 47 } 48 // done 49 return sta; 50 } 51 52 53 CallingConvention* FrameMap::java_calling_convention(const BasicTypeArray* signature, bool outgoing) { 54 // compute the size of the arguments first. The signature array 55 // that java_calling_convention takes includes a T_VOID after double 56 // work items but our signatures do not. 57 int i; 58 int sizeargs = 0; 59 for (i = 0; i < signature->length(); i++) { 60 sizeargs += type2size[signature->at(i)]; 61 } 62 63 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); 64 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); 65 int sig_index = 0; 66 for (i = 0; i < sizeargs; i++, sig_index++) { 67 sig_bt[i] = signature->at(sig_index); 68 if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { 69 sig_bt[i + 1] = T_VOID; 70 i++; 71 } 72 } 73 74 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, outgoing); 75 LIR_OprList* args = new LIR_OprList(signature->length()); 76 for (i = 0; i < sizeargs;) { 77 BasicType t = sig_bt[i]; 78 assert(t != T_VOID, "should be skipping these"); 79 LIR_Opr opr = map_to_opr(t, regs + i, outgoing); 80 args->append(opr); 81 if (opr->is_address()) { 82 LIR_Address* addr = opr->as_address_ptr(); 83 assert(addr->disp() == (int)addr->disp(), "out of range value"); 84 out_preserve = MAX2(out_preserve, (intptr_t)(addr->disp() - STACK_BIAS) / 4); 85 } 86 i += type2size[t]; 87 } 88 assert(args->length() == signature->length(), "size mismatch"); 89 out_preserve += SharedRuntime::out_preserve_stack_slots(); 90 91 if (outgoing) { 92 // update the space reserved for arguments. 93 update_reserved_argument_area_size(out_preserve * BytesPerWord); 94 } 95 return new CallingConvention(args, out_preserve); 96 } 97 98 99 CallingConvention* FrameMap::c_calling_convention(const BasicTypeArray* signature) { 100 // compute the size of the arguments first. The signature array 101 // that java_calling_convention takes includes a T_VOID after double 102 // work items but our signatures do not. 103 int i; 104 int sizeargs = 0; 105 for (i = 0; i < signature->length(); i++) { 106 sizeargs += type2size[signature->at(i)]; 107 } 108 109 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); 110 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); 111 int sig_index = 0; 112 for (i = 0; i < sizeargs; i++, sig_index++) { 113 sig_bt[i] = signature->at(sig_index); 114 if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { 115 sig_bt[i + 1] = T_VOID; 116 i++; 117 } 118 } 119 120 intptr_t out_preserve = SharedRuntime::c_calling_convention(sig_bt, regs, NULL, sizeargs); 121 LIR_OprList* args = new LIR_OprList(signature->length()); 122 for (i = 0; i < sizeargs;) { 123 BasicType t = sig_bt[i]; 124 assert(t != T_VOID, "should be skipping these"); 125 126 // C calls are always outgoing 127 bool outgoing = true; 128 LIR_Opr opr = map_to_opr(t, regs + i, outgoing); 129 // they might be of different types if for instance floating point 130 // values are passed in cpu registers, but the sizes must match. 131 assert(type2size[opr->type()] == type2size[t], "type mismatch"); 132 args->append(opr); 133 if (opr->is_address()) { 134 LIR_Address* addr = opr->as_address_ptr(); 135 out_preserve = MAX2(out_preserve, (intptr_t)(addr->disp() - STACK_BIAS) / 4); 136 } 137 i += type2size[t]; 138 } 139 assert(args->length() == signature->length(), "size mismatch"); 140 out_preserve += SharedRuntime::out_preserve_stack_slots(); 141 update_reserved_argument_area_size(out_preserve * BytesPerWord); 142 return new CallingConvention(args, out_preserve); 143 } 144 145 146 //-------------------------------------------------------- 147 // FrameMap 148 //-------------------------------------------------------- 149 150 bool FrameMap::_init_done = false; 151 Register FrameMap::_cpu_rnr2reg [FrameMap::nof_cpu_regs]; 152 int FrameMap::_cpu_reg2rnr [FrameMap::nof_cpu_regs]; 153 154 155 FrameMap::FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size) { 156 assert(_init_done, "should already be completed"); 157 158 _framesize = -1; 159 _num_spills = -1; 160 161 assert(monitors >= 0, "not set"); 162 _num_monitors = monitors; 163 assert(reserved_argument_area_size >= 0, "not set"); 164 _reserved_argument_area_size = MAX2(4, reserved_argument_area_size) * BytesPerWord; 165 166 _argcount = method->arg_size(); 167 _argument_locations = new intArray(_argcount, _argcount, -1); 168 _incoming_arguments = java_calling_convention(signature_type_array_for(method), false); 169 _oop_map_arg_count = _incoming_arguments->reserved_stack_slots(); 170 171 int java_index = 0; 172 for (int i = 0; i < _incoming_arguments->length(); i++) { 173 LIR_Opr opr = _incoming_arguments->at(i); 174 if (opr->is_address()) { 175 LIR_Address* address = opr->as_address_ptr(); 176 _argument_locations->at_put(java_index, address->disp() - STACK_BIAS); 177 _incoming_arguments->args()->at_put(i, LIR_OprFact::stack(java_index, as_BasicType(as_ValueType(address->type())))); 178 } 179 java_index += type2size[opr->type()]; 180 } 181 182 } 183 184 185 bool FrameMap::finalize_frame(int nof_slots) { 186 assert(nof_slots >= 0, "must be positive"); 187 assert(_num_spills == -1, "can only be set once"); 188 _num_spills = nof_slots; 189 assert(_framesize == -1, "should only be calculated once"); 190 _framesize = round_to(in_bytes(sp_offset_for_monitor_base(0)) + 191 _num_monitors * sizeof(BasicObjectLock) + 192 sizeof(intptr_t) + // offset of deopt orig pc 193 frame_pad_in_bytes, 194 StackAlignmentInBytes) / 4; 195 int java_index = 0; 196 for (int i = 0; i < _incoming_arguments->length(); i++) { 197 LIR_Opr opr = _incoming_arguments->at(i); 198 if (opr->is_stack()) { 199 _argument_locations->at_put(java_index, in_bytes(framesize_in_bytes()) + 200 _argument_locations->at(java_index)); 201 } 202 java_index += type2size[opr->type()]; 203 } 204 // make sure it's expressible on the platform 205 return validate_frame(); 206 } 207 208 VMReg FrameMap::sp_offset2vmreg(ByteSize offset) const { 209 int offset_in_bytes = in_bytes(offset); 210 assert(offset_in_bytes % 4 == 0, "must be multiple of 4 bytes"); 211 assert(offset_in_bytes / 4 < framesize() + oop_map_arg_count(), "out of range"); 212 return VMRegImpl::stack2reg(offset_in_bytes / 4); 213 } 214 215 216 bool FrameMap::location_for_sp_offset(ByteSize byte_offset_from_sp, 217 Location::Type loc_type, 218 Location* loc) const { 219 int offset = in_bytes(byte_offset_from_sp); 220 assert(offset >= 0, "incorrect offset"); 221 if (!Location::legal_offset_in_bytes(offset)) { 222 return false; 223 } 224 Location tmp_loc = Location::new_stk_loc(loc_type, offset); 225 *loc = tmp_loc; 226 return true; 227 } 228 229 230 bool FrameMap::locations_for_slot (int index, Location::Type loc_type, 231 Location* loc, Location* second) const { 232 ByteSize offset_from_sp = sp_offset_for_slot(index); 233 if (!location_for_sp_offset(offset_from_sp, loc_type, loc)) { 234 return false; 235 } 236 if (second != NULL) { 237 // two word item 238 offset_from_sp = offset_from_sp + in_ByteSize(4); 239 return location_for_sp_offset(offset_from_sp, loc_type, second); 240 } 241 return true; 242 } 243 244 ////////////////////// 245 // Public accessors // 246 ////////////////////// 247 248 249 ByteSize FrameMap::sp_offset_for_slot(const int index) const { 250 if (index < argcount()) { 251 int offset = _argument_locations->at(index); 252 assert(offset != -1, "not a memory argument"); 253 assert(offset >= framesize() * 4, "argument inside of frame"); 254 return in_ByteSize(offset); 255 } 256 ByteSize offset = sp_offset_for_spill(index - argcount()); 257 assert(in_bytes(offset) < framesize() * 4, "spill outside of frame"); 258 return offset; 259 } 260 261 262 ByteSize FrameMap::sp_offset_for_double_slot(const int index) const { 263 ByteSize offset = sp_offset_for_slot(index); 264 if (index >= argcount()) { 265 assert(in_bytes(offset) + 4 < framesize() * 4, "spill outside of frame"); 266 } 267 return offset; 268 } 269 270 271 ByteSize FrameMap::sp_offset_for_spill(const int index) const { 272 assert(index >= 0 && index < _num_spills, "out of range"); 273 int offset = round_to(first_available_sp_in_frame + _reserved_argument_area_size, sizeof(double)) + 274 index * spill_slot_size_in_bytes; 275 return in_ByteSize(offset); 276 } 277 278 ByteSize FrameMap::sp_offset_for_monitor_base(const int index) const { 279 int end_of_spills = round_to(first_available_sp_in_frame + _reserved_argument_area_size, sizeof(double)) + 280 _num_spills * spill_slot_size_in_bytes; 281 int offset = (int) round_to(end_of_spills, HeapWordSize) + index * sizeof(BasicObjectLock); 282 return in_ByteSize(offset); 283 } 284 285 ByteSize FrameMap::sp_offset_for_monitor_lock(int index) const { 286 check_monitor_index(index); 287 return sp_offset_for_monitor_base(index) + in_ByteSize(BasicObjectLock::lock_offset_in_bytes());; 288 } 289 290 ByteSize FrameMap::sp_offset_for_monitor_object(int index) const { 291 check_monitor_index(index); 292 return sp_offset_for_monitor_base(index) + in_ByteSize(BasicObjectLock::obj_offset_in_bytes()); 293 } 294 295 296 // For OopMaps, map a local variable or spill index to an VMReg. 297 // This is the offset from sp() in the frame of the slot for the index, 298 // skewed by SharedInfo::stack0 to indicate a stack location (vs.a register.) 299 // 300 // C ABI size + 301 // framesize + framesize + 302 // stack0 stack0 stack0 0 <- VMReg->value() 303 // | | | <registers> | 304 // ..........|..............|..............|.............| 305 // 0 1 2 3 | <C ABI area> | 4 5 6 ...... | <- local indices 306 // ^ ^ sp() 307 // | | 308 // arguments non-argument locals 309 310 311 VMReg FrameMap::regname(LIR_Opr opr) const { 312 if (opr->is_single_cpu()) { 313 assert(!opr->is_virtual(), "should not see virtual registers here"); 314 return opr->as_register()->as_VMReg(); 315 } else if (opr->is_single_stack()) { 316 return sp_offset2vmreg(sp_offset_for_slot(opr->single_stack_ix())); 317 } else if (opr->is_address()) { 318 LIR_Address* addr = opr->as_address_ptr(); 319 assert(addr->base() == stack_pointer(), "sp based addressing only"); 320 return sp_offset2vmreg(in_ByteSize(addr->index()->as_jint())); 321 } 322 ShouldNotReachHere(); 323 return VMRegImpl::Bad(); 324 } 325 326 327 328 329 // ------------ extra spill slots ---------------