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annotate src/share/vm/c1/c1_FrameMap.hpp @ 11722:ff05c78a7f64
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author | Christian Wirth <christian.wirth@oracle.com> |
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date | Thu, 19 Sep 2013 10:36:56 +0200 |
parents | 3c9db54c2660 |
children | de6a9e811145 |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2012, 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 #ifndef SHARE_VM_C1_C1_FRAMEMAP_HPP |
26 #define SHARE_VM_C1_C1_FRAMEMAP_HPP | |
27 | |
28 #include "asm/assembler.hpp" | |
29 #include "c1/c1_Defs.hpp" | |
30 #include "c1/c1_LIR.hpp" | |
31 #include "code/vmreg.hpp" | |
32 #include "memory/allocation.hpp" | |
33 #include "runtime/frame.hpp" | |
34 #include "runtime/synchronizer.hpp" | |
35 #include "utilities/globalDefinitions.hpp" | |
36 | |
0 | 37 class ciMethod; |
38 class CallingConvention; | |
39 class BasicTypeArray; | |
40 class BasicTypeList; | |
41 | |
42 //-------------------------------------------------------- | |
43 // FrameMap | |
44 //-------------------------------------------------------- | |
45 | |
46 // This class is responsible of mapping items (locals, monitors, spill | |
47 // slots and registers to their frame location | |
48 // | |
49 // The monitors are specified by a consecutive index, although each monitor entry | |
50 // occupies two words. The monitor_index is 0.._num_monitors | |
51 // The spill index is similar to local index; it is in range 0..(open) | |
52 // | |
53 // The CPU registers are mapped using a fixed table; register with number 0 | |
54 // is the most used one. | |
55 | |
56 | |
57 // stack grow direction --> SP | |
58 // +----------+---+----------+-------+------------------------+-----+ | |
59 // |arguments | x | monitors | spill | reserved argument area | ABI | | |
60 // +----------+---+----------+-------+------------------------+-----+ | |
61 // | |
62 // x = ABI area (SPARC) or return adress and link (i486) | |
63 // ABI = ABI area (SPARC) or nothing (i486) | |
64 | |
65 | |
66 class LIR_OprDesc; | |
67 typedef LIR_OprDesc* LIR_Opr; | |
68 | |
69 | |
70 class FrameMap : public CompilationResourceObj { | |
71 public: | |
72 enum { | |
73 nof_cpu_regs = pd_nof_cpu_regs_frame_map, | |
74 nof_fpu_regs = pd_nof_fpu_regs_frame_map, | |
75 | |
76 nof_cpu_regs_reg_alloc = pd_nof_cpu_regs_reg_alloc, | |
77 nof_fpu_regs_reg_alloc = pd_nof_fpu_regs_reg_alloc, | |
78 | |
2002 | 79 max_nof_caller_save_cpu_regs = pd_nof_caller_save_cpu_regs_frame_map, |
80 nof_caller_save_fpu_regs = pd_nof_caller_save_fpu_regs_frame_map, | |
0 | 81 |
82 spill_slot_size_in_bytes = 4 | |
83 }; | |
84 | |
1972 | 85 #ifdef TARGET_ARCH_x86 |
86 # include "c1_FrameMap_x86.hpp" | |
87 #endif | |
88 #ifdef TARGET_ARCH_sparc | |
89 # include "c1_FrameMap_sparc.hpp" | |
90 #endif | |
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91 #ifdef TARGET_ARCH_arm |
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92 # include "c1_FrameMap_arm.hpp" |
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93 #endif |
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94 #ifdef TARGET_ARCH_ppc |
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95 # include "c1_FrameMap_ppc.hpp" |
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96 #endif |
1972 | 97 |
0 | 98 |
99 friend class LIR_OprDesc; | |
100 | |
101 private: | |
102 static bool _init_done; | |
103 static Register _cpu_rnr2reg [nof_cpu_regs]; | |
104 static int _cpu_reg2rnr [nof_cpu_regs]; | |
105 | |
2002 | 106 static LIR_Opr _caller_save_cpu_regs [max_nof_caller_save_cpu_regs]; |
0 | 107 static LIR_Opr _caller_save_fpu_regs [nof_caller_save_fpu_regs]; |
108 | |
109 int _framesize; | |
110 int _argcount; | |
111 int _num_monitors; | |
112 int _num_spills; | |
113 int _reserved_argument_area_size; | |
114 int _oop_map_arg_count; | |
115 | |
116 CallingConvention* _incoming_arguments; | |
117 intArray* _argument_locations; | |
118 | |
119 void check_spill_index (int spill_index) const { assert(spill_index >= 0, "bad index"); } | |
120 void check_monitor_index (int monitor_index) const { assert(monitor_index >= 0 && | |
121 monitor_index < _num_monitors, "bad index"); } | |
122 | |
123 static Register cpu_rnr2reg (int rnr) { | |
124 assert(_init_done, "tables not initialized"); | |
125 debug_only(cpu_range_check(rnr);) | |
126 return _cpu_rnr2reg[rnr]; | |
127 } | |
128 | |
129 static int cpu_reg2rnr (Register reg) { | |
130 assert(_init_done, "tables not initialized"); | |
131 debug_only(cpu_range_check(reg->encoding());) | |
132 return _cpu_reg2rnr[reg->encoding()]; | |
133 } | |
134 | |
135 static void map_register(int rnr, Register reg) { | |
136 debug_only(cpu_range_check(rnr);) | |
137 debug_only(cpu_range_check(reg->encoding());) | |
138 _cpu_rnr2reg[rnr] = reg; | |
139 _cpu_reg2rnr[reg->encoding()] = rnr; | |
140 } | |
141 | |
142 void update_reserved_argument_area_size (int size) { | |
143 assert(size >= 0, "check"); | |
144 _reserved_argument_area_size = MAX2(_reserved_argument_area_size, size); | |
145 } | |
146 | |
147 protected: | |
148 #ifndef PRODUCT | |
149 static void cpu_range_check (int rnr) { assert(0 <= rnr && rnr < nof_cpu_regs, "cpu register number is too big"); } | |
150 static void fpu_range_check (int rnr) { assert(0 <= rnr && rnr < nof_fpu_regs, "fpu register number is too big"); } | |
151 #endif | |
152 | |
153 | |
154 ByteSize sp_offset_for_monitor_base(const int idx) const; | |
155 | |
156 Address make_new_address(ByteSize sp_offset) const; | |
157 | |
158 ByteSize sp_offset_for_slot(const int idx) const; | |
159 ByteSize sp_offset_for_double_slot(const int idx) const; | |
160 ByteSize sp_offset_for_spill(const int idx) const; | |
161 ByteSize sp_offset_for_monitor_lock(int monitor_index) const; | |
162 ByteSize sp_offset_for_monitor_object(int monitor_index) const; | |
163 | |
164 VMReg sp_offset2vmreg(ByteSize offset) const; | |
165 | |
166 // platform dependent hook used to check that frame is properly | |
167 // addressable on the platform. Used by sparc to verify that all | |
168 // stack addresses are expressable in a simm13. | |
169 bool validate_frame(); | |
170 | |
171 static LIR_Opr map_to_opr(BasicType type, VMRegPair* reg, bool incoming); | |
172 | |
173 public: | |
174 // Opr representing the stack_pointer on this platform | |
175 static LIR_Opr stack_pointer(); | |
176 | |
1564 | 177 // JSR 292 |
178 static LIR_Opr method_handle_invoke_SP_save_opr(); | |
179 | |
0 | 180 static BasicTypeArray* signature_type_array_for(const ciMethod* method); |
181 | |
182 // for outgoing calls, these also update the reserved area to | |
183 // include space for arguments and any ABI area. | |
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184 CallingConvention* c_calling_convention(const BasicTypeArray* signature); |
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185 CallingConvention* java_calling_convention(const BasicTypeArray* signature, bool outgoing); |
0 | 186 |
187 // deopt support | |
188 ByteSize sp_offset_for_orig_pc() { return sp_offset_for_monitor_base(_num_monitors); } | |
189 | |
190 static LIR_Opr as_opr(Register r) { | |
191 return LIR_OprFact::single_cpu(cpu_reg2rnr(r)); | |
192 } | |
193 static LIR_Opr as_oop_opr(Register r) { | |
194 return LIR_OprFact::single_cpu_oop(cpu_reg2rnr(r)); | |
195 } | |
196 | |
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197 static LIR_Opr as_metadata_opr(Register r) { |
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198 return LIR_OprFact::single_cpu_metadata(cpu_reg2rnr(r)); |
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199 } |
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200 |
0 | 201 FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size); |
202 bool finalize_frame(int nof_slots); | |
203 | |
204 int reserved_argument_area_size () const { return _reserved_argument_area_size; } | |
205 int framesize () const { assert(_framesize != -1, "hasn't been calculated"); return _framesize; } | |
206 ByteSize framesize_in_bytes () const { return in_ByteSize(framesize() * 4); } | |
207 int num_monitors () const { return _num_monitors; } | |
208 int num_spills () const { assert(_num_spills >= 0, "not set"); return _num_spills; } | |
209 int argcount () const { assert(_argcount >= 0, "not set"); return _argcount; } | |
210 | |
211 int oop_map_arg_count() const { return _oop_map_arg_count; } | |
212 | |
213 CallingConvention* incoming_arguments() const { return _incoming_arguments; } | |
214 | |
215 // convenience routines | |
216 Address address_for_slot(int index, int sp_adjust = 0) const { | |
217 return make_new_address(sp_offset_for_slot(index) + in_ByteSize(sp_adjust)); | |
218 } | |
219 Address address_for_double_slot(int index, int sp_adjust = 0) const { | |
220 return make_new_address(sp_offset_for_double_slot(index) + in_ByteSize(sp_adjust)); | |
221 } | |
222 Address address_for_monitor_lock(int monitor_index) const { | |
223 return make_new_address(sp_offset_for_monitor_lock(monitor_index)); | |
224 } | |
225 Address address_for_monitor_object(int monitor_index) const { | |
226 return make_new_address(sp_offset_for_monitor_object(monitor_index)); | |
227 } | |
228 | |
229 // Creates Location describing desired slot and returns it via pointer | |
230 // to Location object. Returns true if the stack frame offset was legal | |
231 // (as defined by Location::legal_offset_in_bytes()), false otherwise. | |
232 // Do not use the returned location if this returns false. | |
233 bool location_for_sp_offset(ByteSize byte_offset_from_sp, | |
234 Location::Type loc_type, Location* loc) const; | |
235 | |
236 bool location_for_monitor_lock (int monitor_index, Location* loc) const { | |
237 return location_for_sp_offset(sp_offset_for_monitor_lock(monitor_index), Location::normal, loc); | |
238 } | |
239 bool location_for_monitor_object(int monitor_index, Location* loc) const { | |
240 return location_for_sp_offset(sp_offset_for_monitor_object(monitor_index), Location::oop, loc); | |
241 } | |
242 bool locations_for_slot (int index, Location::Type loc_type, | |
243 Location* loc, Location* second = NULL) const; | |
244 | |
245 VMReg slot_regname(int index) const { | |
246 return sp_offset2vmreg(sp_offset_for_slot(index)); | |
247 } | |
248 VMReg monitor_object_regname(int monitor_index) const { | |
249 return sp_offset2vmreg(sp_offset_for_monitor_object(monitor_index)); | |
250 } | |
251 VMReg regname(LIR_Opr opr) const; | |
252 | |
253 static LIR_Opr caller_save_cpu_reg_at(int i) { | |
2002 | 254 assert(i >= 0 && i < max_nof_caller_save_cpu_regs, "out of bounds"); |
0 | 255 return _caller_save_cpu_regs[i]; |
256 } | |
257 | |
258 static LIR_Opr caller_save_fpu_reg_at(int i) { | |
259 assert(i >= 0 && i < nof_caller_save_fpu_regs, "out of bounds"); | |
260 return _caller_save_fpu_regs[i]; | |
261 } | |
262 | |
1584 | 263 static void initialize(); |
0 | 264 }; |
265 | |
266 // CallingConvention | |
267 //-------------------------------------------------------- | |
268 | |
269 class CallingConvention: public ResourceObj { | |
270 private: | |
271 LIR_OprList* _args; | |
272 int _reserved_stack_slots; | |
273 | |
274 public: | |
275 CallingConvention (LIR_OprList* args, int reserved_stack_slots) | |
276 : _args(args) | |
277 , _reserved_stack_slots(reserved_stack_slots) {} | |
278 | |
279 LIR_OprList* args() { return _args; } | |
280 | |
281 LIR_Opr at(int i) const { return _args->at(i); } | |
282 int length() const { return _args->length(); } | |
283 | |
284 // Indicates number of real frame slots used by arguments passed on stack. | |
285 int reserved_stack_slots() const { return _reserved_stack_slots; } | |
286 | |
287 #ifndef PRODUCT | |
288 void print () const { | |
289 for (int i = 0; i < length(); i++) { | |
290 at(i)->print(); | |
291 } | |
292 } | |
293 #endif // PRODUCT | |
294 }; | |
1972 | 295 |
296 #endif // SHARE_VM_C1_C1_FRAMEMAP_HPP |