1 #ifdef USE_PRAGMA_IDENT_HDR
2 #pragma ident "@(#)oopMap.hpp 1.81 07/09/28 10:23:19 JVM"
3 #endif
4 /*
5 * Copyright 1998-2007 Sun Microsystems, Inc. All Rights Reserved.
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7 *
8 * This code is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 only, as
10 * published by the Free Software Foundation.
11 *
12 * This code is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * version 2 for more details (a copy is included in the LICENSE file that
16 * accompanied this code).
17 *
18 * You should have received a copy of the GNU General Public License version
19 * 2 along with this work; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
24 * have any questions.
25 *
32 // Dead - Dead; can be Zapped for debugging
33 // CalleeXX - Callee saved; also describes which caller register is saved
34 // DerivedXX - A derived oop; original oop is described.
35 //
36 // OopMapValue describes a single OopMap entry
37
38 class frame;
39 class RegisterMap;
40 class DerivedPointerEntry;
41
42 class OopMapValue: public StackObj {
43 friend class VMStructs;
44 private:
45 short _value;
46 int value() const { return _value; }
47 void set_value(int value) { _value = value; }
48 short _content_reg;
49
50 public:
51 // Constants
52 enum { type_bits = 6,
53 register_bits = BitsPerShort - type_bits };
54
55 enum { type_shift = 0,
56 register_shift = type_bits };
57
58 enum { type_mask = right_n_bits(type_bits),
59 type_mask_in_place = type_mask << type_shift,
60 register_mask = right_n_bits(register_bits),
61 register_mask_in_place = register_mask << register_shift };
62
63 enum oop_types { // must fit in type_bits
64 unused_value =0, // powers of 2, for masking OopMapStream
65 oop_value = 1,
66 value_value = 2,
67 dead_value = 4,
68 callee_saved_value = 8,
69 derived_oop_value= 16,
70 stack_obj = 32 };
71
72 // Constructors
73 OopMapValue () { set_value(0); set_content_reg(VMRegImpl::Bad()); }
74 OopMapValue (VMReg reg, oop_types t) { set_reg_type(reg,t); }
75 OopMapValue (VMReg reg, oop_types t, VMReg reg2) { set_reg_type(reg,t); set_content_reg(reg2); }
76 OopMapValue (CompressedReadStream* stream) { read_from(stream); }
77
78 // Archiving
79 void write_on(CompressedWriteStream* stream) {
80 stream->write_int(value());
81 if(is_callee_saved() || is_derived_oop()) {
82 stream->write_int(content_reg()->value());
83 }
84 }
85
86 void read_from(CompressedReadStream* stream) {
87 set_value(stream->read_int());
88 if(is_callee_saved() || is_derived_oop()) {
89 set_content_reg(VMRegImpl::as_VMReg(stream->read_int(), true));
90 }
91 }
92
93 // Querying
94 bool is_oop() { return mask_bits(value(), type_mask_in_place) == oop_value; }
95 bool is_value() { return mask_bits(value(), type_mask_in_place) == value_value; }
96 bool is_dead() { return mask_bits(value(), type_mask_in_place) == dead_value; }
97 bool is_callee_saved() { return mask_bits(value(), type_mask_in_place) == callee_saved_value; }
98 bool is_derived_oop() { return mask_bits(value(), type_mask_in_place) == derived_oop_value; }
99 bool is_stack_obj() { return mask_bits(value(), type_mask_in_place) == stack_obj; }
100
101 void set_oop() { set_value((value() & register_mask_in_place) | oop_value); }
102 void set_value() { set_value((value() & register_mask_in_place) | value_value); }
103 void set_dead() { set_value((value() & register_mask_in_place) | dead_value); }
104 void set_callee_saved() { set_value((value() & register_mask_in_place) | callee_saved_value); }
105 void set_derived_oop() { set_value((value() & register_mask_in_place) | derived_oop_value); }
106 void set_stack_obj() { set_value((value() & register_mask_in_place) | stack_obj); }
107
108 VMReg reg() const { return VMRegImpl::as_VMReg(mask_bits(value(), register_mask_in_place) >> register_shift); }
109 oop_types type() const { return (oop_types)mask_bits(value(), type_mask_in_place); }
110
111 static bool legal_vm_reg_name(VMReg p) {
112 return (p->value() == (p->value() & register_mask));
113 }
114
115 void set_reg_type(VMReg p, oop_types t) {
116 set_value((p->value() << register_shift) | t);
117 assert(reg() == p, "sanity check" );
118 assert(type() == t, "sanity check" );
119 }
120
121
122 VMReg content_reg() const { return VMRegImpl::as_VMReg(_content_reg, true); }
123 void set_content_reg(VMReg r) { _content_reg = r->value(); }
124
125 // Physical location queries
126 bool is_register_loc() { return reg()->is_reg(); }
127 bool is_stack_loc() { return reg()->is_stack(); }
128
129 // Returns offset from sp.
130 int stack_offset() {
131 assert(is_stack_loc(), "must be stack location");
132 return reg()->reg2stack();
133 }
134
135 void print( ) const PRODUCT_RETURN;
136 };
137
138
139 class OopMap: public ResourceObj {
140 friend class OopMapStream;
141 friend class VMStructs;
142 private:
143 int _pc_offset;
144 int _omv_count;
145 int _omv_data_size;
146 unsigned char* _omv_data;
147 CompressedWriteStream* _write_stream;
148
149 debug_only( OopMapValue::oop_types* _locs_used; int _locs_length;)
150
151 // Accessors
152 unsigned char* omv_data() const { return _omv_data; }
153 void set_omv_data(unsigned char* value) { _omv_data = value; }
154 int omv_data_size() const { return _omv_data_size; }
155 void set_omv_data_size(int value) { _omv_data_size = value; }
161
162 private:
163 enum DeepCopyToken { _deep_copy_token };
164 OopMap(DeepCopyToken, OopMap* source); // used only by deep_copy
165
166 public:
167 OopMap(int frame_size, int arg_count);
168
169 // pc-offset handling
170 int offset() const { return _pc_offset; }
171 void set_offset(int o) { _pc_offset = o; }
172
173 // Check to avoid double insertion
174 debug_only(OopMapValue::oop_types locs_used( int indx ) { return _locs_used[indx]; })
175
176 // Construction
177 // frame_size units are stack-slots (4 bytes) NOT intptr_t; we can name odd
178 // slots to hold 4-byte values like ints and floats in the LP64 build.
179 void set_oop ( VMReg local);
180 void set_value( VMReg local);
181 void set_dead ( VMReg local);
182 void set_callee_saved( VMReg local, VMReg caller_machine_register );
183 void set_derived_oop ( VMReg local, VMReg derived_from_local_register );
184 void set_stack_obj( VMReg local);
185 void set_xxx(VMReg reg, OopMapValue::oop_types x, VMReg optional);
186
187 int heap_size() const;
188 void copy_to(address addr);
189 OopMap* deep_copy();
190
191 bool has_derived_pointer() const PRODUCT_RETURN0;
192
193 bool legal_vm_reg_name(VMReg local) {
194 return OopMapValue::legal_vm_reg_name(local);
195 }
196
197 // Printing
198 void print_on(outputStream* st) const PRODUCT_RETURN;
199 void print() const { print_on(tty); }
200 };
201
202
203 class OopMapSet : public ResourceObj {
204 friend class VMStructs;
205 private:
206 int _om_count;
207 int _om_size;
208 OopMap** _om_data;
209
210 int om_count() const { return _om_count; }
211 void set_om_count(int value) { _om_count = value; }
212 void increment_count() { _om_count++; }
213 int om_size() const { return _om_size; }
214 void set_om_size(int value) { _om_size = value; }
215 OopMap** om_data() const { return _om_data; }
216 void set_om_data(OopMap** value) { _om_data = value; }
217 void grow_om_data();
218 void set(int index,OopMap* value) { assert((index == 0) || ((index > 0) && (index < om_size())),"bad index"); _om_data[index] = value; }
230
231 // Returns the only oop map. Used for reconstructing
232 // Adapter frames during deoptimization
233 OopMap* singular_oop_map();
234
235 // returns OopMap in that is anchored to the pc
236 OopMap* find_map_at_offset(int pc_offset) const;
237
238 int heap_size() const;
239 void copy_to(address addr);
240
241 // Iterates through frame for a compiled method
242 static void oops_do (const frame* fr,
243 const RegisterMap* reg_map, OopClosure* f);
244 static void update_register_map(const frame* fr, RegisterMap *reg_map);
245
246 // Iterates through frame for a compiled method for dead ones and values, too
247 static void all_do(const frame* fr, const RegisterMap* reg_map,
248 OopClosure* oop_fn,
249 void derived_oop_fn(oop* base, oop* derived),
250 OopClosure* value_fn, OopClosure* dead_fn);
251
252 // Printing
253 void print_on(outputStream* st) const PRODUCT_RETURN;
254 void print() const { print_on(tty); }
255 };
256
257
258 class OopMapStream : public StackObj {
259 private:
260 CompressedReadStream* _stream;
261 int _mask;
262 int _size;
263 int _position;
264 bool _valid_omv;
265 OopMapValue _omv;
266 void find_next();
267
268 public:
269 OopMapStream(OopMap* oop_map);
270 OopMapStream(OopMap* oop_map, int oop_types_mask);
271 bool is_done() { if(!_valid_omv) { find_next(); } return !_valid_omv; }
272 void next() { find_next(); }
273 OopMapValue current() { return _omv; }
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1 #ifdef USE_PRAGMA_IDENT_HDR
2 #pragma ident "@(#)oopMap.hpp 1.81 07/09/28 10:23:19 JVM"
3 #endif
4 /*
5 * Copyright 1998-2008 Sun Microsystems, Inc. All Rights Reserved.
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7 *
8 * This code is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 only, as
10 * published by the Free Software Foundation.
11 *
12 * This code is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * version 2 for more details (a copy is included in the LICENSE file that
16 * accompanied this code).
17 *
18 * You should have received a copy of the GNU General Public License version
19 * 2 along with this work; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
24 * have any questions.
25 *
32 // Dead - Dead; can be Zapped for debugging
33 // CalleeXX - Callee saved; also describes which caller register is saved
34 // DerivedXX - A derived oop; original oop is described.
35 //
36 // OopMapValue describes a single OopMap entry
37
38 class frame;
39 class RegisterMap;
40 class DerivedPointerEntry;
41
42 class OopMapValue: public StackObj {
43 friend class VMStructs;
44 private:
45 short _value;
46 int value() const { return _value; }
47 void set_value(int value) { _value = value; }
48 short _content_reg;
49
50 public:
51 // Constants
52 enum { type_bits = 5,
53 register_bits = BitsPerShort - type_bits };
54
55 enum { type_shift = 0,
56 register_shift = type_bits };
57
58 enum { type_mask = right_n_bits(type_bits),
59 type_mask_in_place = type_mask << type_shift,
60 register_mask = right_n_bits(register_bits),
61 register_mask_in_place = register_mask << register_shift };
62
63 enum oop_types { // must fit in type_bits
64 unused_value =0, // powers of 2, for masking OopMapStream
65 oop_value = 1,
66 value_value = 2,
67 narrowoop_value = 4,
68 callee_saved_value = 8,
69 derived_oop_value= 16 };
70
71 // Constructors
72 OopMapValue () { set_value(0); set_content_reg(VMRegImpl::Bad()); }
73 OopMapValue (VMReg reg, oop_types t) { set_reg_type(reg,t); }
74 OopMapValue (VMReg reg, oop_types t, VMReg reg2) { set_reg_type(reg,t); set_content_reg(reg2); }
75 OopMapValue (CompressedReadStream* stream) { read_from(stream); }
76
77 // Archiving
78 void write_on(CompressedWriteStream* stream) {
79 stream->write_int(value());
80 if(is_callee_saved() || is_derived_oop()) {
81 stream->write_int(content_reg()->value());
82 }
83 }
84
85 void read_from(CompressedReadStream* stream) {
86 set_value(stream->read_int());
87 if(is_callee_saved() || is_derived_oop()) {
88 set_content_reg(VMRegImpl::as_VMReg(stream->read_int(), true));
89 }
90 }
91
92 // Querying
93 bool is_oop() { return mask_bits(value(), type_mask_in_place) == oop_value; }
94 bool is_value() { return mask_bits(value(), type_mask_in_place) == value_value; }
95 bool is_narrowoop() { return mask_bits(value(), type_mask_in_place) == narrowoop_value; }
96 bool is_callee_saved() { return mask_bits(value(), type_mask_in_place) == callee_saved_value; }
97 bool is_derived_oop() { return mask_bits(value(), type_mask_in_place) == derived_oop_value; }
98
99 void set_oop() { set_value((value() & register_mask_in_place) | oop_value); }
100 void set_value() { set_value((value() & register_mask_in_place) | value_value); }
101 void set_narrowoop() { set_value((value() & register_mask_in_place) | narrowoop_value); }
102 void set_callee_saved() { set_value((value() & register_mask_in_place) | callee_saved_value); }
103 void set_derived_oop() { set_value((value() & register_mask_in_place) | derived_oop_value); }
104
105 VMReg reg() const { return VMRegImpl::as_VMReg(mask_bits(value(), register_mask_in_place) >> register_shift); }
106 oop_types type() const { return (oop_types)mask_bits(value(), type_mask_in_place); }
107
108 static bool legal_vm_reg_name(VMReg p) {
109 return (p->value() == (p->value() & register_mask));
110 }
111
112 void set_reg_type(VMReg p, oop_types t) {
113 set_value((p->value() << register_shift) | t);
114 assert(reg() == p, "sanity check" );
115 assert(type() == t, "sanity check" );
116 }
117
118
119 VMReg content_reg() const { return VMRegImpl::as_VMReg(_content_reg, true); }
120 void set_content_reg(VMReg r) { _content_reg = r->value(); }
121
122 // Physical location queries
123 bool is_register_loc() { return reg()->is_reg(); }
124 bool is_stack_loc() { return reg()->is_stack(); }
125
126 // Returns offset from sp.
127 int stack_offset() {
128 assert(is_stack_loc(), "must be stack location");
129 return reg()->reg2stack();
130 }
131
132 void print_on(outputStream* st) const;
133 void print() const { print_on(tty); }
134 };
135
136
137 class OopMap: public ResourceObj {
138 friend class OopMapStream;
139 friend class VMStructs;
140 private:
141 int _pc_offset;
142 int _omv_count;
143 int _omv_data_size;
144 unsigned char* _omv_data;
145 CompressedWriteStream* _write_stream;
146
147 debug_only( OopMapValue::oop_types* _locs_used; int _locs_length;)
148
149 // Accessors
150 unsigned char* omv_data() const { return _omv_data; }
151 void set_omv_data(unsigned char* value) { _omv_data = value; }
152 int omv_data_size() const { return _omv_data_size; }
153 void set_omv_data_size(int value) { _omv_data_size = value; }
159
160 private:
161 enum DeepCopyToken { _deep_copy_token };
162 OopMap(DeepCopyToken, OopMap* source); // used only by deep_copy
163
164 public:
165 OopMap(int frame_size, int arg_count);
166
167 // pc-offset handling
168 int offset() const { return _pc_offset; }
169 void set_offset(int o) { _pc_offset = o; }
170
171 // Check to avoid double insertion
172 debug_only(OopMapValue::oop_types locs_used( int indx ) { return _locs_used[indx]; })
173
174 // Construction
175 // frame_size units are stack-slots (4 bytes) NOT intptr_t; we can name odd
176 // slots to hold 4-byte values like ints and floats in the LP64 build.
177 void set_oop ( VMReg local);
178 void set_value( VMReg local);
179 void set_narrowoop(VMReg local);
180 void set_dead ( VMReg local);
181 void set_callee_saved( VMReg local, VMReg caller_machine_register );
182 void set_derived_oop ( VMReg local, VMReg derived_from_local_register );
183 void set_xxx(VMReg reg, OopMapValue::oop_types x, VMReg optional);
184
185 int heap_size() const;
186 void copy_to(address addr);
187 OopMap* deep_copy();
188
189 bool has_derived_pointer() const PRODUCT_RETURN0;
190
191 bool legal_vm_reg_name(VMReg local) {
192 return OopMapValue::legal_vm_reg_name(local);
193 }
194
195 // Printing
196 void print_on(outputStream* st) const;
197 void print() const { print_on(tty); }
198 };
199
200
201 class OopMapSet : public ResourceObj {
202 friend class VMStructs;
203 private:
204 int _om_count;
205 int _om_size;
206 OopMap** _om_data;
207
208 int om_count() const { return _om_count; }
209 void set_om_count(int value) { _om_count = value; }
210 void increment_count() { _om_count++; }
211 int om_size() const { return _om_size; }
212 void set_om_size(int value) { _om_size = value; }
213 OopMap** om_data() const { return _om_data; }
214 void set_om_data(OopMap** value) { _om_data = value; }
215 void grow_om_data();
216 void set(int index,OopMap* value) { assert((index == 0) || ((index > 0) && (index < om_size())),"bad index"); _om_data[index] = value; }
228
229 // Returns the only oop map. Used for reconstructing
230 // Adapter frames during deoptimization
231 OopMap* singular_oop_map();
232
233 // returns OopMap in that is anchored to the pc
234 OopMap* find_map_at_offset(int pc_offset) const;
235
236 int heap_size() const;
237 void copy_to(address addr);
238
239 // Iterates through frame for a compiled method
240 static void oops_do (const frame* fr,
241 const RegisterMap* reg_map, OopClosure* f);
242 static void update_register_map(const frame* fr, RegisterMap *reg_map);
243
244 // Iterates through frame for a compiled method for dead ones and values, too
245 static void all_do(const frame* fr, const RegisterMap* reg_map,
246 OopClosure* oop_fn,
247 void derived_oop_fn(oop* base, oop* derived),
248 OopClosure* value_fn);
249
250 // Printing
251 void print_on(outputStream* st) const;
252 void print() const { print_on(tty); }
253 };
254
255
256 class OopMapStream : public StackObj {
257 private:
258 CompressedReadStream* _stream;
259 int _mask;
260 int _size;
261 int _position;
262 bool _valid_omv;
263 OopMapValue _omv;
264 void find_next();
265
266 public:
267 OopMapStream(OopMap* oop_map);
268 OopMapStream(OopMap* oop_map, int oop_types_mask);
269 bool is_done() { if(!_valid_omv) { find_next(); } return !_valid_omv; }
270 void next() { find_next(); }
271 OopMapValue current() { return _omv; }
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