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 #include "utilities/align.hpp" 31 32 //----------------------------------------------------- 33 34 // Convert method signature into an array of BasicTypes for the arguments 35 BasicTypeArray* FrameMap::signature_type_array_for(const ciMethod* method) { 36 ciSignature* sig = method->signature(); 37 BasicTypeList* sta = new BasicTypeList(method->arg_size()); 38 // add receiver, if any 39 if (!method->is_static()) sta->append(T_OBJECT); 40 // add remaining arguments 41 for (int i = 0; i < sig->count(); i++) { 42 ciType* type = sig->type_at(i); 43 BasicType t = type->basic_type(); 44 if (t == T_ARRAY) { 45 t = T_OBJECT; 46 } 47 sta->append(t); 48 } 49 // done 50 return sta; 51 } 52 53 54 CallingConvention* FrameMap::java_calling_convention(const BasicTypeArray* signature, bool outgoing) { 55 // compute the size of the arguments first. The signature array 56 // that java_calling_convention takes includes a T_VOID after double 57 // work items but our signatures do not. 58 int i; 59 int sizeargs = 0; 60 for (i = 0; i < signature->length(); i++) { 61 sizeargs += type2size[signature->at(i)]; 62 } 63 64 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); 65 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); 66 int sig_index = 0; 67 for (i = 0; i < sizeargs; i++, sig_index++) { 68 sig_bt[i] = signature->at(sig_index); 69 if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { 70 sig_bt[i + 1] = T_VOID; 71 i++; 72 } 73 } 74 75 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, outgoing); 76 LIR_OprList* args = new LIR_OprList(signature->length()); 77 for (i = 0; i < sizeargs;) { 78 BasicType t = sig_bt[i]; 79 assert(t != T_VOID, "should be skipping these"); 80 LIR_Opr opr = map_to_opr(t, regs + i, outgoing); 81 args->append(opr); 82 if (opr->is_address()) { 83 LIR_Address* addr = opr->as_address_ptr(); 84 assert(addr->disp() == (int)addr->disp(), "out of range value"); 85 out_preserve = MAX2(out_preserve, (intptr_t)(addr->disp() - STACK_BIAS) / 4); 86 } 87 i += type2size[t]; 88 } 89 assert(args->length() == signature->length(), "size mismatch"); 90 out_preserve += SharedRuntime::out_preserve_stack_slots(); 91 92 if (outgoing) { 93 // update the space reserved for arguments. 94 update_reserved_argument_area_size(out_preserve * BytesPerWord); 95 } 96 return new CallingConvention(args, out_preserve); 97 } 98 99 100 CallingConvention* FrameMap::c_calling_convention(const BasicTypeArray* signature) { 101 // compute the size of the arguments first. The signature array 102 // that java_calling_convention takes includes a T_VOID after double 103 // work items but our signatures do not. 104 int i; 105 int sizeargs = 0; 106 for (i = 0; i < signature->length(); i++) { 107 sizeargs += type2size[signature->at(i)]; 108 } 109 110 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); 111 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); 112 int sig_index = 0; 113 for (i = 0; i < sizeargs; i++, sig_index++) { 114 sig_bt[i] = signature->at(sig_index); 115 if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { 116 sig_bt[i + 1] = T_VOID; 117 i++; 118 } 119 } 120 121 intptr_t out_preserve = SharedRuntime::c_calling_convention(sig_bt, regs, NULL, sizeargs); 122 LIR_OprList* args = new LIR_OprList(signature->length()); 123 for (i = 0; i < sizeargs;) { 124 BasicType t = sig_bt[i]; 125 assert(t != T_VOID, "should be skipping these"); 126 127 // C calls are always outgoing 128 bool outgoing = true; 129 LIR_Opr opr = map_to_opr(t, regs + i, outgoing); 130 // they might be of different types if for instance floating point 131 // values are passed in cpu registers, but the sizes must match. 132 assert(type2size[opr->type()] == type2size[t], "type mismatch"); 133 args->append(opr); 134 if (opr->is_address()) { 135 LIR_Address* addr = opr->as_address_ptr(); 136 out_preserve = MAX2(out_preserve, (intptr_t)(addr->disp() - STACK_BIAS) / 4); 137 } 138 i += type2size[t]; 139 } 140 assert(args->length() == signature->length(), "size mismatch"); 141 out_preserve += SharedRuntime::out_preserve_stack_slots(); 142 update_reserved_argument_area_size(out_preserve * BytesPerWord); 143 return new CallingConvention(args, out_preserve); 144 } 145 146 147 //-------------------------------------------------------- 148 // FrameMap 149 //-------------------------------------------------------- 150 151 bool FrameMap::_init_done = false; 152 Register FrameMap::_cpu_rnr2reg [FrameMap::nof_cpu_regs]; 153 int FrameMap::_cpu_reg2rnr [FrameMap::nof_cpu_regs]; 154 155 156 FrameMap::FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size) { 157 assert(_init_done, "should already be completed"); 158 159 _framesize = -1; 160 _num_spills = -1; 161 162 assert(monitors >= 0, "not set"); 163 _num_monitors = monitors; 164 assert(reserved_argument_area_size >= 0, "not set"); 165 _reserved_argument_area_size = MAX2(4, reserved_argument_area_size) * BytesPerWord; 166 167 _argcount = method->arg_size(); 168 _argument_locations = new intArray(_argcount, _argcount, -1); 169 _incoming_arguments = java_calling_convention(signature_type_array_for(method), false); 170 _oop_map_arg_count = _incoming_arguments->reserved_stack_slots(); 171 172 int java_index = 0; 173 for (int i = 0; i < _incoming_arguments->length(); i++) { 174 LIR_Opr opr = _incoming_arguments->at(i); 175 if (opr->is_address()) { 176 LIR_Address* address = opr->as_address_ptr(); 177 _argument_locations->at_put(java_index, address->disp() - STACK_BIAS); 178 _incoming_arguments->args()->at_put(i, LIR_OprFact::stack(java_index, as_BasicType(as_ValueType(address->type())))); 179 } 180 java_index += type2size[opr->type()]; 181 } 182 183 } 184 185 186 bool FrameMap::finalize_frame(int nof_slots) { 187 assert(nof_slots >= 0, "must be positive"); 188 assert(_num_spills == -1, "can only be set once"); 189 _num_spills = nof_slots; 190 assert(_framesize == -1, "should only be calculated once"); 191 _framesize = align_up(in_bytes(sp_offset_for_monitor_base(0)) + 192 _num_monitors * (int)sizeof(BasicObjectLock) + 193 (int)sizeof(intptr_t) + // offset of deopt orig pc 194 frame_pad_in_bytes, 195 StackAlignmentInBytes) / 4; 196 int java_index = 0; 197 for (int i = 0; i < _incoming_arguments->length(); i++) { 198 LIR_Opr opr = _incoming_arguments->at(i); 199 if (opr->is_stack()) { 200 _argument_locations->at_put(java_index, in_bytes(framesize_in_bytes()) + 201 _argument_locations->at(java_index)); 202 } 203 java_index += type2size[opr->type()]; 204 } 205 // make sure it's expressible on the platform 206 return validate_frame(); 207 } 208 209 VMReg FrameMap::sp_offset2vmreg(ByteSize offset) const { 210 int offset_in_bytes = in_bytes(offset); 211 assert(offset_in_bytes % 4 == 0, "must be multiple of 4 bytes"); 212 assert(offset_in_bytes / 4 < framesize() + oop_map_arg_count(), "out of range"); 213 return VMRegImpl::stack2reg(offset_in_bytes / 4); 214 } 215 216 217 bool FrameMap::location_for_sp_offset(ByteSize byte_offset_from_sp, 218 Location::Type loc_type, 219 Location* loc) const { 220 int offset = in_bytes(byte_offset_from_sp); 221 assert(offset >= 0, "incorrect offset"); 222 if (!Location::legal_offset_in_bytes(offset)) { 223 return false; 224 } 225 Location tmp_loc = Location::new_stk_loc(loc_type, offset); 226 *loc = tmp_loc; 227 return true; 228 } 229 230 231 bool FrameMap::locations_for_slot (int index, Location::Type loc_type, 232 Location* loc, Location* second) const { 233 ByteSize offset_from_sp = sp_offset_for_slot(index); 234 if (!location_for_sp_offset(offset_from_sp, loc_type, loc)) { 235 return false; 236 } 237 if (second != NULL) { 238 // two word item 239 offset_from_sp = offset_from_sp + in_ByteSize(4); 240 return location_for_sp_offset(offset_from_sp, loc_type, second); 241 } 242 return true; 243 } 244 245 ////////////////////// 246 // Public accessors // 247 ////////////////////// 248 249 250 ByteSize FrameMap::sp_offset_for_slot(const int index) const { 251 if (index < argcount()) { 252 int offset = _argument_locations->at(index); 253 assert(offset != -1, "not a memory argument"); 254 assert(offset >= framesize() * 4, "argument inside of frame"); 255 return in_ByteSize(offset); 256 } 257 ByteSize offset = sp_offset_for_spill(index - argcount()); 258 assert(in_bytes(offset) < framesize() * 4, "spill outside of frame"); 259 return offset; 260 } 261 262 263 ByteSize FrameMap::sp_offset_for_double_slot(const int index) const { 264 ByteSize offset = sp_offset_for_slot(index); 265 if (index >= argcount()) { 266 assert(in_bytes(offset) + 4 < framesize() * 4, "spill outside of frame"); 267 } 268 return offset; 269 } 270 271 272 ByteSize FrameMap::sp_offset_for_spill(const int index) const { 273 assert(index >= 0 && index < _num_spills, "out of range"); 274 int offset = align_up(first_available_sp_in_frame + _reserved_argument_area_size, (int)sizeof(double)) + 275 index * spill_slot_size_in_bytes; 276 return in_ByteSize(offset); 277 } 278 279 ByteSize FrameMap::sp_offset_for_monitor_base(const int index) const { 280 int end_of_spills = align_up(first_available_sp_in_frame + _reserved_argument_area_size, (int)sizeof(double)) + 281 _num_spills * spill_slot_size_in_bytes; 282 int offset = align_up(end_of_spills, HeapWordSize) + index * (int)sizeof(BasicObjectLock); 283 return in_ByteSize(offset); 284 } 285 286 ByteSize FrameMap::sp_offset_for_monitor_lock(int index) const { 287 check_monitor_index(index); 288 return sp_offset_for_monitor_base(index) + in_ByteSize(BasicObjectLock::lock_offset_in_bytes());; 289 } 290 291 ByteSize FrameMap::sp_offset_for_monitor_object(int index) const { 292 check_monitor_index(index); 293 return sp_offset_for_monitor_base(index) + in_ByteSize(BasicObjectLock::obj_offset_in_bytes()); 294 } 295 296 297 // For OopMaps, map a local variable or spill index to an VMReg. 298 // This is the offset from sp() in the frame of the slot for the index, 299 // skewed by SharedInfo::stack0 to indicate a stack location (vs.a register.) 300 // 301 // C ABI size + 302 // framesize + framesize + 303 // stack0 stack0 stack0 0 <- VMReg->value() 304 // | | | <registers> | 305 // ..........|..............|..............|.............| 306 // 0 1 2 3 | <C ABI area> | 4 5 6 ...... | <- local indices 307 // ^ ^ sp() 308 // | | 309 // arguments non-argument locals 310 311 312 VMReg FrameMap::regname(LIR_Opr opr) const { 313 if (opr->is_single_cpu()) { 314 assert(!opr->is_virtual(), "should not see virtual registers here"); 315 return opr->as_register()->as_VMReg(); 316 } else if (opr->is_single_stack()) { 317 return sp_offset2vmreg(sp_offset_for_slot(opr->single_stack_ix())); 318 } else if (opr->is_address()) { 319 LIR_Address* addr = opr->as_address_ptr(); 320 assert(addr->base() == stack_pointer(), "sp based addressing only"); 321 return sp_offset2vmreg(in_ByteSize(addr->index()->as_jint())); 322 } 323 ShouldNotReachHere(); 324 return VMRegImpl::Bad(); 325 } 326 327 328 329 330 // ------------ extra spill slots ---------------