1 /*
2 * Copyright (c) 2001, 2011, 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 #ifndef SHARE_VM_CI_CIMETHODDATA_HPP
26 #define SHARE_VM_CI_CIMETHODDATA_HPP
27
28 #include "ci/ciClassList.hpp"
29 #include "ci/ciKlass.hpp"
30 #include "ci/ciObject.hpp"
31 #include "ci/ciUtilities.hpp"
32 #include "oops/methodDataOop.hpp"
33 #include "oops/oop.inline.hpp"
34
35 class ciBitData;
36 class ciCounterData;
37 class ciJumpData;
38 class ciReceiverTypeData;
39 class ciRetData;
40 class ciBranchData;
41 class ciArrayData;
42 class ciMultiBranchData;
43 class ciArgInfoData;
44
45 typedef ProfileData ciProfileData;
46
47 class ciBitData : public BitData {
48 public:
49 ciBitData(DataLayout* layout) : BitData(layout) {};
50 };
51
52 class ciCounterData : public CounterData {
53 public:
54 ciCounterData(DataLayout* layout) : CounterData(layout) {};
55 };
56
57 class ciJumpData : public JumpData {
58 public:
59 ciJumpData(DataLayout* layout) : JumpData(layout) {};
60 };
61
62 class ciReceiverTypeData : public ReceiverTypeData {
63 public:
64 ciReceiverTypeData(DataLayout* layout) : ReceiverTypeData(layout) {};
65
66 void set_receiver(uint row, ciKlass* recv) {
67 assert((uint)row < row_limit(), "oob");
68 set_intptr_at(receiver0_offset + row * receiver_type_row_cell_count,
69 (intptr_t) recv);
70 }
71
72 ciKlass* receiver(uint row) {
73 assert((uint)row < row_limit(), "oob");
74 ciObject* recv = (ciObject*)intptr_at(receiver0_offset + row * receiver_type_row_cell_count);
75 assert(recv == NULL || recv->is_klass(), "wrong type");
76 return (ciKlass*)recv;
77 }
78
79 // Copy & translate from oop based ReceiverTypeData
80 virtual void translate_from(ProfileData* data) {
81 translate_receiver_data_from(data);
82 }
83 void translate_receiver_data_from(ProfileData* data);
84 #ifndef PRODUCT
85 void print_data_on(outputStream* st);
86 void print_receiver_data_on(outputStream* st);
87 #endif
88 };
89
90 class ciVirtualCallData : public VirtualCallData {
91 // Fake multiple inheritance... It's a ciReceiverTypeData also.
92 ciReceiverTypeData* rtd_super() { return (ciReceiverTypeData*) this; }
93
94 public:
95 ciVirtualCallData(DataLayout* layout) : VirtualCallData(layout) {};
96
97 void set_receiver(uint row, ciKlass* recv) {
98 rtd_super()->set_receiver(row, recv);
99 }
100
101 ciKlass* receiver(uint row) {
102 return rtd_super()->receiver(row);
103 }
104
105 // Copy & translate from oop based VirtualCallData
106 virtual void translate_from(ProfileData* data) {
107 rtd_super()->translate_receiver_data_from(data);
108 }
109 #ifndef PRODUCT
110 void print_data_on(outputStream* st);
111 #endif
112 };
113
114
115 class ciRetData : public RetData {
116 public:
117 ciRetData(DataLayout* layout) : RetData(layout) {};
118 };
119
120 class ciBranchData : public BranchData {
121 public:
122 ciBranchData(DataLayout* layout) : BranchData(layout) {};
123 };
124
125 class ciArrayData : public ArrayData {
126 public:
127 ciArrayData(DataLayout* layout) : ArrayData(layout) {};
128 };
129
130 class ciMultiBranchData : public MultiBranchData {
131 public:
132 ciMultiBranchData(DataLayout* layout) : MultiBranchData(layout) {};
133 };
134
135 class ciArgInfoData : public ArgInfoData {
136 public:
137 ciArgInfoData(DataLayout* layout) : ArgInfoData(layout) {};
138 };
139
140 // ciMethodData
141 //
142 // This class represents a methodDataOop in the HotSpot virtual
143 // machine.
144
145 class ciMethodData : public ciObject {
146 CI_PACKAGE_ACCESS
147
148 private:
149 // Size in bytes
150 int _data_size;
151 int _extra_data_size;
152
153 // Data entries
154 intptr_t* _data;
155
156 // Cached hint for data_before()
157 int _hint_di;
158
159 // Is data attached? And is it mature?
160 enum { empty_state, immature_state, mature_state };
161 u_char _state;
162
163 // Set this true if empty extra_data slots are ever witnessed.
164 u_char _saw_free_extra_data;
165
166 // Support for interprocedural escape analysis
167 intx _eflags; // flags on escape information
168 intx _arg_local; // bit set of non-escaping arguments
169 intx _arg_stack; // bit set of stack-allocatable arguments
170 intx _arg_returned; // bit set of returned arguments
171
172 // Maturity of the oop when the snapshot is taken.
173 int _current_mileage;
174
175 // These counters hold the age of MDO in tiered. In tiered we can have the same method
176 // running at different compilation levels concurrently. So, in order to precisely measure
177 // its maturity we need separate counters.
178 int _invocation_counter;
179 int _backedge_counter;
180
181 // Coherent snapshot of original header.
182 methodDataOopDesc _orig;
183
184 ciMethodData(methodDataHandle h_md);
185 ciMethodData();
186
187 // Accessors
188 int data_size() const { return _data_size; }
189 int extra_data_size() const { return _extra_data_size; }
190 intptr_t * data() const { return _data; }
191
192 methodDataOop get_methodDataOop() const {
193 if (handle() == NULL) return NULL;
194 methodDataOop mdo = (methodDataOop)get_oop();
195 assert(mdo != NULL, "illegal use of unloaded method data");
196 return mdo;
197 }
198
199 const char* type_string() { return "ciMethodData"; }
200
201 void print_impl(outputStream* st);
202
203 DataLayout* data_layout_at(int data_index) const {
204 assert(data_index % sizeof(intptr_t) == 0, "unaligned");
205 return (DataLayout*) (((address)_data) + data_index);
206 }
207
208 bool out_of_bounds(int data_index) {
209 return data_index >= data_size();
210 }
211
212 // hint accessors
213 int hint_di() const { return _hint_di; }
214 void set_hint_di(int di) {
215 assert(!out_of_bounds(di), "hint_di out of bounds");
216 _hint_di = di;
217 }
218 ciProfileData* data_before(int bci) {
219 // avoid SEGV on this edge case
220 if (data_size() == 0)
221 return NULL;
222 int hint = hint_di();
223 if (data_layout_at(hint)->bci() <= bci)
224 return data_at(hint);
225 return first_data();
226 }
227
228
229 // What is the index of the first data entry?
230 int first_di() { return 0; }
231
232 ciArgInfoData *arg_info() const;
233
234 public:
235 bool is_method_data() { return true; }
236
237 void set_mature() { _state = mature_state; }
238
239 bool is_empty() { return _state == empty_state; }
240 bool is_mature() { return _state == mature_state; }
241
242 int creation_mileage() { return _orig.creation_mileage(); }
243 int current_mileage() { return _current_mileage; }
244
245 int invocation_count() { return _invocation_counter; }
246 int backedge_count() { return _backedge_counter; }
247 // Transfer information about the method to methodDataOop.
248 // would_profile means we would like to profile this method,
249 // meaning it's not trivial.
250 void set_would_profile(bool p);
251 // Also set the numer of loops and blocks in the method.
252 // Again, this is used to determine if a method is trivial.
253 void set_compilation_stats(short loops, short blocks);
254
255 void load_data();
256
257 // Convert a dp (data pointer) to a di (data index).
258 int dp_to_di(address dp) {
259 return dp - ((address)_data);
260 }
261
262 // Get the data at an arbitrary (sort of) data index.
263 ciProfileData* data_at(int data_index);
264
265 // Walk through the data in order.
266 ciProfileData* first_data() { return data_at(first_di()); }
267 ciProfileData* next_data(ciProfileData* current);
268 bool is_valid(ciProfileData* current) { return current != NULL; }
269
270 // Get the data at an arbitrary bci, or NULL if there is none.
271 ciProfileData* bci_to_data(int bci);
272 ciProfileData* bci_to_extra_data(int bci, bool create_if_missing);
273
274 uint overflow_trap_count() const {
275 return _orig.overflow_trap_count();
276 }
277 uint overflow_recompile_count() const {
278 return _orig.overflow_recompile_count();
279 }
280 uint decompile_count() const {
281 return _orig.decompile_count();
282 }
283 uint trap_count(int reason) const {
284 return _orig.trap_count(reason);
285 }
286 uint trap_reason_limit() const { return _orig.trap_reason_limit(); }
287 uint trap_count_limit() const { return _orig.trap_count_limit(); }
288
289 // Helpful query functions that decode trap_state.
290 int has_trap_at(ciProfileData* data, int reason);
291 int has_trap_at(int bci, int reason) {
292 return has_trap_at(bci_to_data(bci), reason);
293 }
294 int trap_recompiled_at(ciProfileData* data);
295 int trap_recompiled_at(int bci) {
296 return trap_recompiled_at(bci_to_data(bci));
297 }
298
299 void clear_escape_info();
300 bool has_escape_info();
301 void update_escape_info();
302
303 void set_eflag(methodDataOopDesc::EscapeFlag f);
304 void clear_eflag(methodDataOopDesc::EscapeFlag f);
305 bool eflag_set(methodDataOopDesc::EscapeFlag f) const;
306
307 void set_arg_local(int i);
308 void set_arg_stack(int i);
309 void set_arg_returned(int i);
310 void set_arg_modified(int arg, uint val);
311
312 bool is_arg_local(int i) const;
313 bool is_arg_stack(int i) const;
314 bool is_arg_returned(int i) const;
315 uint arg_modified(int arg) const;
316
317 // Code generation helper
318 ByteSize offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data);
319 int byte_offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data) { return in_bytes(offset_of_slot(data, slot_offset_in_data)); }
320
321 #ifndef PRODUCT
322 // printing support for method data
323 void print();
324 void print_data_on(outputStream* st);
325 #endif
326 };
327
328 #endif // SHARE_VM_CI_CIMETHODDATA_HPP