c1_FrameMap.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 2000, 2006, 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.
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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.
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23 */
24
25class ciMethod;
26class CallingConvention;
27class BasicTypeArray;
28class 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
54class LIR_OprDesc;
55typedef LIR_OprDesc* LIR_Opr;
56
57
58class 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  static BasicTypeArray*     signature_type_array_for(const ciMethod* method);
154  static BasicTypeArray*     signature_type_array_for(const char * signature);
155
156  // for outgoing calls, these also update the reserved area to
157  // include space for arguments and any ABI area.
158  CallingConvention* c_calling_convention (const BasicTypeArray* signature);
159  CallingConvention* java_calling_convention (const BasicTypeArray* signature, bool outgoing);
160
161  // deopt support
162  ByteSize sp_offset_for_orig_pc() { return sp_offset_for_monitor_base(_num_monitors); }
163
164  static LIR_Opr as_opr(Register r) {
165    return LIR_OprFact::single_cpu(cpu_reg2rnr(r));
166  }
167  static LIR_Opr as_oop_opr(Register r) {
168    return LIR_OprFact::single_cpu_oop(cpu_reg2rnr(r));
169  }
170
171  FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size);
172  bool finalize_frame(int nof_slots);
173
174  int   reserved_argument_area_size () const     { return _reserved_argument_area_size; }
175  int   framesize                   () const     { assert(_framesize != -1, "hasn't been calculated"); return _framesize; }
176  ByteSize framesize_in_bytes       () const     { return in_ByteSize(framesize() * 4); }
177  int   num_monitors                () const     { return _num_monitors; }
178  int   num_spills                  () const     { assert(_num_spills >= 0, "not set"); return _num_spills; }
179  int   argcount              () const     { assert(_argcount >= 0, "not set"); return _argcount; }
180
181  int oop_map_arg_count() const { return _oop_map_arg_count; }
182
183  CallingConvention* incoming_arguments() const  { return _incoming_arguments; }
184
185  // convenience routines
186  Address address_for_slot(int index, int sp_adjust = 0) const {
187    return make_new_address(sp_offset_for_slot(index) + in_ByteSize(sp_adjust));
188  }
189  Address address_for_double_slot(int index, int sp_adjust = 0) const {
190    return make_new_address(sp_offset_for_double_slot(index) + in_ByteSize(sp_adjust));
191  }
192  Address address_for_monitor_lock(int monitor_index) const {
193    return make_new_address(sp_offset_for_monitor_lock(monitor_index));
194  }
195  Address address_for_monitor_object(int monitor_index) const {
196    return make_new_address(sp_offset_for_monitor_object(monitor_index));
197  }
198
199  void print_frame_layout() const;
200
201  // Creates Location describing desired slot and returns it via pointer
202  // to Location object. Returns true if the stack frame offset was legal
203  // (as defined by Location::legal_offset_in_bytes()), false otherwise.
204  // Do not use the returned location if this returns false.
205  bool location_for_sp_offset(ByteSize byte_offset_from_sp,
206                              Location::Type loc_type, Location* loc) const;
207
208  bool location_for_monitor_lock  (int monitor_index, Location* loc) const {
209    return location_for_sp_offset(sp_offset_for_monitor_lock(monitor_index), Location::normal, loc);
210  }
211  bool location_for_monitor_object(int monitor_index, Location* loc) const {
212    return location_for_sp_offset(sp_offset_for_monitor_object(monitor_index), Location::oop, loc);
213  }
214  bool locations_for_slot  (int index, Location::Type loc_type,
215                            Location* loc, Location* second = NULL) const;
216
217  VMReg slot_regname(int index) const {
218    return sp_offset2vmreg(sp_offset_for_slot(index));
219  }
220  VMReg monitor_object_regname(int monitor_index) const {
221    return sp_offset2vmreg(sp_offset_for_monitor_object(monitor_index));
222  }
223  VMReg regname(LIR_Opr opr) const;
224
225  static LIR_Opr caller_save_cpu_reg_at(int i) {
226    assert(i >= 0 && i < nof_caller_save_cpu_regs, "out of bounds");
227    return _caller_save_cpu_regs[i];
228  }
229
230  static LIR_Opr caller_save_fpu_reg_at(int i) {
231    assert(i >= 0 && i < nof_caller_save_fpu_regs, "out of bounds");
232    return _caller_save_fpu_regs[i];
233  }
234
235  static void init();
236};
237
238//               CallingConvention
239//--------------------------------------------------------
240
241class CallingConvention: public ResourceObj {
242 private:
243  LIR_OprList* _args;
244  int          _reserved_stack_slots;
245
246 public:
247  CallingConvention (LIR_OprList* args, int reserved_stack_slots)
248    : _args(args)
249    , _reserved_stack_slots(reserved_stack_slots)  {}
250
251  LIR_OprList* args()       { return _args; }
252
253  LIR_Opr at(int i) const   { return _args->at(i); }
254  int length() const        { return _args->length(); }
255
256  // Indicates number of real frame slots used by arguments passed on stack.
257  int reserved_stack_slots() const            { return _reserved_stack_slots; }
258
259#ifndef PRODUCT
260  void print () const {
261    for (int i = 0; i < length(); i++) {
262      at(i)->print();
263    }
264  }
265#endif // PRODUCT
266};
267