1 /* 2 * Copyright (c) 2000, 2010, 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 class ciMethod; 26 class CallingConvention; 27 class BasicTypeArray; 28 class BasicTypeList; 29 30 //-------------------------------------------------------- 31 // FrameMap 32 //-------------------------------------------------------- 33 34 // This class is responsible of mapping items (locals, monitors, spill 35 // slots and registers to their frame location 36 // 37 // The monitors are specified by a consecutive index, although each monitor entry 38 // occupies two words. The monitor_index is 0.._num_monitors 39 // The spill index is similar to local index; it is in range 0..(open) 40 // 41 // The CPU registers are mapped using a fixed table; register with number 0 42 // is the most used one. 43 44 45 // stack grow direction --> SP 46 // +----------+---+----------+-------+------------------------+-----+ 47 // |arguments | x | monitors | spill | reserved argument area | ABI | 48 // +----------+---+----------+-------+------------------------+-----+ 49 // 50 // x = ABI area (SPARC) or return adress and link (i486) 51 // ABI = ABI area (SPARC) or nothing (i486) 52 53 54 class LIR_OprDesc; 55 typedef LIR_OprDesc* LIR_Opr; 56 57 58 class FrameMap : public CompilationResourceObj { 59 public: 60 enum { 61 nof_cpu_regs = pd_nof_cpu_regs_frame_map, 62 nof_fpu_regs = pd_nof_fpu_regs_frame_map, 63 64 nof_cpu_regs_reg_alloc = pd_nof_cpu_regs_reg_alloc, 65 nof_fpu_regs_reg_alloc = pd_nof_fpu_regs_reg_alloc, 66 67 nof_caller_save_cpu_regs = pd_nof_caller_save_cpu_regs_frame_map, 68 nof_caller_save_fpu_regs = pd_nof_caller_save_fpu_regs_frame_map, 69 70 spill_slot_size_in_bytes = 4 71 }; 72 73 # include "incls/_c1_FrameMap_pd.hpp.incl" // platform dependent declarations 74 75 friend class LIR_OprDesc; 76 77 private: 78 static bool _init_done; 79 static Register _cpu_rnr2reg [nof_cpu_regs]; 80 static int _cpu_reg2rnr [nof_cpu_regs]; 81 82 static LIR_Opr _caller_save_cpu_regs [nof_caller_save_cpu_regs]; 83 static LIR_Opr _caller_save_fpu_regs [nof_caller_save_fpu_regs]; 84 85 int _framesize; 86 int _argcount; 87 int _num_monitors; 88 int _num_spills; 89 int _reserved_argument_area_size; 90 int _oop_map_arg_count; 91 92 CallingConvention* _incoming_arguments; 93 intArray* _argument_locations; 94 95 void check_spill_index (int spill_index) const { assert(spill_index >= 0, "bad index"); } 96 void check_monitor_index (int monitor_index) const { assert(monitor_index >= 0 && 97 monitor_index < _num_monitors, "bad index"); } 98 99 static Register cpu_rnr2reg (int rnr) { 100 assert(_init_done, "tables not initialized"); 101 debug_only(cpu_range_check(rnr);) 102 return _cpu_rnr2reg[rnr]; 103 } 104 105 static int cpu_reg2rnr (Register reg) { 106 assert(_init_done, "tables not initialized"); 107 debug_only(cpu_range_check(reg->encoding());) 108 return _cpu_reg2rnr[reg->encoding()]; 109 } 110 111 static void map_register(int rnr, Register reg) { 112 debug_only(cpu_range_check(rnr);) 113 debug_only(cpu_range_check(reg->encoding());) 114 _cpu_rnr2reg[rnr] = reg; 115 _cpu_reg2rnr[reg->encoding()] = rnr; 116 } 117 118 void update_reserved_argument_area_size (int size) { 119 assert(size >= 0, "check"); 120 _reserved_argument_area_size = MAX2(_reserved_argument_area_size, size); 121 } 122 123 protected: 124 #ifndef PRODUCT 125 static void cpu_range_check (int rnr) { assert(0 <= rnr && rnr < nof_cpu_regs, "cpu register number is too big"); } 126 static void fpu_range_check (int rnr) { assert(0 <= rnr && rnr < nof_fpu_regs, "fpu register number is too big"); } 127 #endif 128 129 130 ByteSize sp_offset_for_monitor_base(const int idx) const; 131 132 Address make_new_address(ByteSize sp_offset) const; 133 134 ByteSize sp_offset_for_slot(const int idx) const; 135 ByteSize sp_offset_for_double_slot(const int idx) const; 136 ByteSize sp_offset_for_spill(const int idx) const; 137 ByteSize sp_offset_for_monitor_lock(int monitor_index) const; 138 ByteSize sp_offset_for_monitor_object(int monitor_index) const; 139 140 VMReg sp_offset2vmreg(ByteSize offset) const; 141 142 // platform dependent hook used to check that frame is properly 143 // addressable on the platform. Used by sparc to verify that all 144 // stack addresses are expressable in a simm13. 145 bool validate_frame(); 146 147 static LIR_Opr map_to_opr(BasicType type, VMRegPair* reg, bool incoming); 148 149 public: 150 // Opr representing the stack_pointer on this platform 151 static LIR_Opr stack_pointer(); 152 153 // JSR 292 154 static LIR_Opr method_handle_invoke_SP_save_opr(); 155 156 static BasicTypeArray* signature_type_array_for(const ciMethod* method); 157 158 // for outgoing calls, these also update the reserved area to 159 // include space for arguments and any ABI area. 160 CallingConvention* c_calling_convention (const BasicTypeArray* signature); 161 CallingConvention* java_calling_convention (const BasicTypeArray* signature, bool outgoing); 162 163 // deopt support 164 ByteSize sp_offset_for_orig_pc() { return sp_offset_for_monitor_base(_num_monitors); } 165 166 static LIR_Opr as_opr(Register r) { 167 return LIR_OprFact::single_cpu(cpu_reg2rnr(r)); 168 } 169 static LIR_Opr as_oop_opr(Register r) { 170 return LIR_OprFact::single_cpu_oop(cpu_reg2rnr(r)); 171 } 172 173 FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size); 174 bool finalize_frame(int nof_slots); 175 176 int reserved_argument_area_size () const { return _reserved_argument_area_size; } 177 int framesize () const { assert(_framesize != -1, "hasn't been calculated"); return _framesize; } 178 ByteSize framesize_in_bytes () const { return in_ByteSize(framesize() * 4); } 179 int num_monitors () const { return _num_monitors; } 180 int num_spills () const { assert(_num_spills >= 0, "not set"); return _num_spills; } 181 int argcount () const { assert(_argcount >= 0, "not set"); return _argcount; } 182 183 int oop_map_arg_count() const { return _oop_map_arg_count; } 184 185 CallingConvention* incoming_arguments() const { return _incoming_arguments; } 186 187 // convenience routines 188 Address address_for_slot(int index, int sp_adjust = 0) const { 189 return make_new_address(sp_offset_for_slot(index) + in_ByteSize(sp_adjust)); 190 } 191 Address address_for_double_slot(int index, int sp_adjust = 0) const { 192 return make_new_address(sp_offset_for_double_slot(index) + in_ByteSize(sp_adjust)); 193 } 194 Address address_for_monitor_lock(int monitor_index) const { 195 return make_new_address(sp_offset_for_monitor_lock(monitor_index)); 196 } 197 Address address_for_monitor_object(int monitor_index) const { 198 return make_new_address(sp_offset_for_monitor_object(monitor_index)); 199 } 200 201 void print_frame_layout() const; 202 203 // Creates Location describing desired slot and returns it via pointer 204 // to Location object. Returns true if the stack frame offset was legal 205 // (as defined by Location::legal_offset_in_bytes()), false otherwise. 206 // Do not use the returned location if this returns false. 207 bool location_for_sp_offset(ByteSize byte_offset_from_sp, 208 Location::Type loc_type, Location* loc) const; 209 210 bool location_for_monitor_lock (int monitor_index, Location* loc) const { 211 return location_for_sp_offset(sp_offset_for_monitor_lock(monitor_index), Location::normal, loc); 212 } 213 bool location_for_monitor_object(int monitor_index, Location* loc) const { 214 return location_for_sp_offset(sp_offset_for_monitor_object(monitor_index), Location::oop, loc); 215 } 216 bool locations_for_slot (int index, Location::Type loc_type, 217 Location* loc, Location* second = NULL) const; 218 219 VMReg slot_regname(int index) const { 220 return sp_offset2vmreg(sp_offset_for_slot(index)); 221 } 222 VMReg monitor_object_regname(int monitor_index) const { 223 return sp_offset2vmreg(sp_offset_for_monitor_object(monitor_index)); 224 } 225 VMReg regname(LIR_Opr opr) const; 226 227 static LIR_Opr caller_save_cpu_reg_at(int i) { 228 assert(i >= 0 && i < nof_caller_save_cpu_regs, "out of bounds"); 229 return _caller_save_cpu_regs[i]; 230 } 231 232 static LIR_Opr caller_save_fpu_reg_at(int i) { 233 assert(i >= 0 && i < nof_caller_save_fpu_regs, "out of bounds"); 234 return _caller_save_fpu_regs[i]; 235 } 236 237 static void initialize(); 238 }; 239 240 // CallingConvention 241 //-------------------------------------------------------- 242 243 class CallingConvention: public ResourceObj { 244 private: 245 LIR_OprList* _args; 246 int _reserved_stack_slots; 247 248 public: 249 CallingConvention (LIR_OprList* args, int reserved_stack_slots) 250 : _args(args) 251 , _reserved_stack_slots(reserved_stack_slots) {} 252 253 LIR_OprList* args() { return _args; } 254 255 LIR_Opr at(int i) const { return _args->at(i); } 256 int length() const { return _args->length(); } 257 258 // Indicates number of real frame slots used by arguments passed on stack. 259 int reserved_stack_slots() const { return _reserved_stack_slots; } 260 261 #ifndef PRODUCT 262 void print () const { 263 for (int i = 0; i < length(); i++) { 264 at(i)->print(); 265 } 266 } 267 #endif // PRODUCT 268 };