Mercurial > hg > truffle
annotate src/share/vm/oops/methodOop.hpp @ 5274:e72dd6533eb9
documented importance of nmethod::_graal_compiled_method wrt code unloading and GC
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 23 Apr 2012 15:42:30 +0200 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 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_OOPS_METHODOOP_HPP |
26 #define SHARE_VM_OOPS_METHODOOP_HPP | |
27 | |
28 #include "classfile/vmSymbols.hpp" | |
29 #include "code/compressedStream.hpp" | |
30 #include "compiler/oopMap.hpp" | |
31 #include "interpreter/invocationCounter.hpp" | |
32 #include "oops/constMethodOop.hpp" | |
33 #include "oops/constantPoolOop.hpp" | |
34 #include "oops/instanceKlass.hpp" | |
35 #include "oops/oop.hpp" | |
36 #include "oops/typeArrayOop.hpp" | |
37 #include "utilities/accessFlags.hpp" | |
38 #include "utilities/growableArray.hpp" | |
39 | |
0 | 40 // A methodOop represents a Java method. |
41 // | |
42 // Memory layout (each line represents a word). Note that most applications load thousands of methods, | |
43 // so keeping the size of this structure small has a big impact on footprint. | |
44 // | |
45 // We put all oops and method_size first for better gc cache locality. | |
46 // | |
47 // The actual bytecodes are inlined after the end of the methodOopDesc struct. | |
48 // | |
49 // There are bits in the access_flags telling whether inlined tables are present. | |
50 // Note that accessing the line number and local variable tables is not performance critical at all. | |
51 // Accessing the checked exceptions table is used by reflection, so we put that last to make access | |
52 // to it fast. | |
53 // | |
54 // The line number table is compressed and inlined following the byte codes. It is found as the first | |
55 // byte following the byte codes. The checked exceptions table and the local variable table are inlined | |
56 // after the line number table, and indexed from the end of the method. We do not compress the checked | |
57 // exceptions table since the average length is less than 2, and do not bother to compress the local | |
58 // variable table either since it is mostly absent. | |
59 // | |
60 // Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter) | |
61 // | |
62 // |------------------------------------------------------| | |
63 // | header | | |
64 // | klass | | |
65 // |------------------------------------------------------| | |
66 // | constMethodOop (oop) | | |
67 // | constants (oop) | | |
68 // |------------------------------------------------------| | |
69 // | methodData (oop) | | |
70 // | interp_invocation_count | | |
71 // |------------------------------------------------------| | |
72 // | access_flags | | |
73 // | vtable_index | | |
74 // |------------------------------------------------------| | |
75 // | result_index (C++ interpreter only) | | |
76 // |------------------------------------------------------| | |
77 // | method_size | max_stack | | |
78 // | max_locals | size_of_parameters | | |
79 // |------------------------------------------------------| | |
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80 // |intrinsic_id| flags | throwout_count | |
0 | 81 // |------------------------------------------------------| |
1783 | 82 // | num_breakpoints | (unused) | |
0 | 83 // |------------------------------------------------------| |
84 // | invocation_counter | | |
85 // | backedge_counter | | |
86 // |------------------------------------------------------| | |
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87 // | prev_time (tiered only, 64 bit wide) | |
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88 // | | |
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89 // |------------------------------------------------------| |
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90 // | rate (tiered) | |
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91 // |------------------------------------------------------| |
0 | 92 // | code (pointer) | |
93 // | i2i (pointer) | | |
94 // | adapter (pointer) | | |
95 // | from_compiled_entry (pointer) | | |
96 // | from_interpreted_entry (pointer) | | |
97 // |------------------------------------------------------| | |
98 // | native_function (present only if native) | | |
99 // | signature_handler (present only if native) | | |
100 // |------------------------------------------------------| | |
101 | |
102 | |
103 class CheckedExceptionElement; | |
104 class LocalVariableTableElement; | |
105 class AdapterHandlerEntry; | |
106 class methodDataOopDesc; | |
107 | |
108 class methodOopDesc : public oopDesc { | |
109 friend class methodKlass; | |
110 friend class VMStructs; | |
111 private: | |
112 constMethodOop _constMethod; // Method read-only data. | |
113 constantPoolOop _constants; // Constant pool | |
114 methodDataOop _method_data; | |
1783 | 115 int _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered) |
0 | 116 AccessFlags _access_flags; // Access flags |
117 int _vtable_index; // vtable index of this method (see VtableIndexFlag) | |
118 // note: can have vtables with >2**16 elements (because of inheritance) | |
119 #ifdef CC_INTERP | |
120 int _result_index; // C++ interpreter needs for converting results to/from stack | |
121 #endif | |
122 u2 _method_size; // size of this object | |
123 u2 _max_stack; // Maximum number of entries on the expression stack | |
124 u2 _max_locals; // Number of local variables used by this method | |
125 u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words | |
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126 u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none) |
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127 u1 _jfr_towrite : 1, // Flags |
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128 : 7; |
0 | 129 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting |
130 u2 _number_of_breakpoints; // fullspeed debugging support | |
131 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations | |
132 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations | |
1783 | 133 |
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134 #ifdef GRAAL |
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135 oop _graal_mirror; // com/oracle/graal/hotspot/HotSpotMethodResolved mirroring this method |
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136 jlong _graal_invocation_time; |
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137 int _graal_priority; |
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138 #endif |
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139 #ifdef TIERED |
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140 jlong _prev_time; // Previous time the rate was acquired |
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141 float _rate; // Events (invocation and backedge counter increments) per millisecond |
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142 #endif |
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143 |
0 | 144 #ifndef PRODUCT |
145 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) | |
146 #endif | |
147 // Entry point for calling both from and to the interpreter. | |
148 address _i2i_entry; // All-args-on-stack calling convention | |
149 // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked. | |
150 AdapterHandlerEntry* _adapter; | |
151 // Entry point for calling from compiled code, to compiled code if it exists | |
152 // or else the interpreter. | |
153 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() | |
154 // The entry point for calling both from and to compiled code is | |
155 // "_code->entry_point()". Because of tiered compilation and de-opt, this | |
156 // field can come and go. It can transition from NULL to not-null at any | |
157 // time (whenever a compile completes). It can transition from not-null to | |
158 // NULL only at safepoints (because of a de-opt). | |
159 nmethod* volatile _code; // Points to the corresponding piece of native code | |
160 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry | |
161 | |
162 public: | |
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163 |
0 | 164 // accessors for instance variables |
165 constMethodOop constMethod() const { return _constMethod; } | |
166 void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); } | |
167 | |
168 | |
169 static address make_adapters(methodHandle mh, TRAPS); | |
170 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
171 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
172 | |
173 // access flag | |
174 AccessFlags access_flags() const { return _access_flags; } | |
175 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
176 | |
177 // name | |
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178 Symbol* name() const { return _constants->symbol_at(name_index()); } |
0 | 179 int name_index() const { return constMethod()->name_index(); } |
180 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
181 | |
182 // signature | |
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183 Symbol* signature() const { return _constants->symbol_at(signature_index()); } |
0 | 184 int signature_index() const { return constMethod()->signature_index(); } |
185 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
186 | |
187 // generics support | |
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188 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (Symbol*)NULL); } |
0 | 189 int generic_signature_index() const { return constMethod()->generic_signature_index(); } |
190 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
191 | |
192 // annotations support | |
193 typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); } | |
194 typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); } | |
195 typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); } | |
196 | |
197 #ifdef CC_INTERP | |
198 void set_result_index(BasicType type); | |
199 int result_index() { return _result_index; } | |
200 #endif | |
201 | |
202 // Helper routine: get klass name + "." + method name + signature as | |
203 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
204 // and fatal error handling. The string is allocated in resource | |
205 // area if a buffer is not provided by the caller. | |
206 char* name_and_sig_as_C_string(); | |
207 char* name_and_sig_as_C_string(char* buf, int size); | |
208 | |
209 // Static routine in the situations we don't have a methodOop | |
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210 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature); |
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211 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size); |
0 | 212 |
2142 | 213 Bytecodes::Code java_code_at(int bci) const { |
214 return Bytecodes::java_code_at(this, bcp_from(bci)); | |
215 } | |
216 Bytecodes::Code code_at(int bci) const { | |
217 return Bytecodes::code_at(this, bcp_from(bci)); | |
218 } | |
219 | |
0 | 220 // JVMTI breakpoints |
2142 | 221 Bytecodes::Code orig_bytecode_at(int bci) const; |
0 | 222 void set_orig_bytecode_at(int bci, Bytecodes::Code code); |
223 void set_breakpoint(int bci); | |
224 void clear_breakpoint(int bci); | |
225 void clear_all_breakpoints(); | |
226 // Tracking number of breakpoints, for fullspeed debugging. | |
227 // Only mutated by VM thread. | |
228 u2 number_of_breakpoints() const { return _number_of_breakpoints; } | |
229 void incr_number_of_breakpoints() { ++_number_of_breakpoints; } | |
230 void decr_number_of_breakpoints() { --_number_of_breakpoints; } | |
231 // Initialization only | |
232 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; } | |
233 | |
234 // index into instanceKlass methods() array | |
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235 // note: also used by jfr |
0 | 236 u2 method_idnum() const { return constMethod()->method_idnum(); } |
237 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
238 | |
239 // code size | |
240 int code_size() const { return constMethod()->code_size(); } | |
241 | |
242 // method size | |
243 int method_size() const { return _method_size; } | |
244 void set_method_size(int size) { | |
245 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
246 _method_size = size; | |
247 } | |
248 | |
249 // constant pool for klassOop holding this method | |
250 constantPoolOop constants() const { return _constants; } | |
251 void set_constants(constantPoolOop c) { oop_store_without_check((oop*)&_constants, c); } | |
252 | |
253 // max stack | |
254 int max_stack() const { return _max_stack; } | |
255 void set_max_stack(int size) { _max_stack = size; } | |
256 | |
257 // max locals | |
258 int max_locals() const { return _max_locals; } | |
259 void set_max_locals(int size) { _max_locals = size; } | |
1783 | 260 |
261 int highest_comp_level() const; | |
262 void set_highest_comp_level(int level); | |
263 int highest_osr_comp_level() const; | |
264 void set_highest_osr_comp_level(int level); | |
0 | 265 |
266 // Count of times method was exited via exception while interpreting | |
267 void interpreter_throwout_increment() { | |
268 if (_interpreter_throwout_count < 65534) { | |
269 _interpreter_throwout_count++; | |
270 } | |
271 } | |
272 | |
273 int interpreter_throwout_count() const { return _interpreter_throwout_count; } | |
274 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; } | |
275 | |
276 // size of parameters | |
277 int size_of_parameters() const { return _size_of_parameters; } | |
278 | |
279 bool has_stackmap_table() const { | |
280 return constMethod()->has_stackmap_table(); | |
281 } | |
282 | |
283 typeArrayOop stackmap_data() const { | |
284 return constMethod()->stackmap_data(); | |
285 } | |
286 | |
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287 void set_stackmap_data(typeArrayOop sd) { |
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288 constMethod()->set_stackmap_data(sd); |
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289 } |
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290 |
0 | 291 // exception handler table |
292 typeArrayOop exception_table() const | |
293 { return constMethod()->exception_table(); } | |
294 void set_exception_table(typeArrayOop e) | |
295 { constMethod()->set_exception_table(e); } | |
296 bool has_exception_handler() const | |
297 { return constMethod()->has_exception_handler(); } | |
298 | |
299 // Finds the first entry point bci of an exception handler for an | |
300 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
301 // for ex_klass indicates that the exception klass is not known; in | |
302 // this case it matches any constraint class. Returns -1 if the | |
303 // exception cannot be handled in this method. The handler | |
304 // constraint classes are loaded if necessary. Note that this may | |
305 // throw an exception if loading of the constraint classes causes | |
306 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
307 // If an exception is thrown, returns the bci of the | |
308 // exception handler which caused the exception to be thrown, which | |
309 // is needed for proper retries. See, for example, | |
310 // InterpreterRuntime::exception_handler_for_exception. | |
311 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS); | |
312 | |
313 // method data access | |
314 methodDataOop method_data() const { | |
315 return _method_data; | |
316 } | |
317 void set_method_data(methodDataOop data) { | |
318 oop_store_without_check((oop*)&_method_data, (oop)data); | |
319 } | |
320 | |
321 // invocation counter | |
1783 | 322 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
323 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
324 | |
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325 #ifdef TIERED |
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326 // We are reusing interpreter_invocation_count as a holder for the previous event count! |
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327 // We can do that since interpreter_invocation_count is not used in tiered. |
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328 int prev_event_count() const { return _interpreter_invocation_count; } |
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329 void set_prev_event_count(int count) { _interpreter_invocation_count = count; } |
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330 jlong prev_time() const { return _prev_time; } |
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331 void set_prev_time(jlong time) { _prev_time = time; } |
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332 float rate() const { return _rate; } |
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333 void set_rate(float rate) { _rate = rate; } |
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334 #endif |
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335 |
1783 | 336 int invocation_count(); |
337 int backedge_count(); | |
338 | |
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339 #ifdef GRAAL |
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340 // graal mirror |
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341 oop graal_mirror() const { return _graal_mirror; } |
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342 void set_graal_mirror(oop m) { oop_store((oop*) &_graal_mirror, m); } |
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343 |
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344 void set_graal_invocation_time(jlong time) { _graal_invocation_time = time; } |
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345 jlong graal_invocation_time() { return _graal_invocation_time; } |
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346 |
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347 void set_graal_priority(int prio) { _graal_priority = prio; } |
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348 int graal_priority() { return _graal_priority; } |
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349 #endif // GRAAL |
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350 |
1783 | 351 bool was_executed_more_than(int n); |
352 bool was_never_executed() { return !was_executed_more_than(0); } | |
0 | 353 |
354 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
355 | |
1783 | 356 int interpreter_invocation_count() { |
357 if (TieredCompilation) return invocation_count(); | |
358 else return _interpreter_invocation_count; | |
359 } | |
0 | 360 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; } |
1783 | 361 int increment_interpreter_invocation_count() { |
362 if (TieredCompilation) ShouldNotReachHere(); | |
363 return ++_interpreter_invocation_count; | |
364 } | |
0 | 365 |
366 #ifndef PRODUCT | |
1783 | 367 int compiled_invocation_count() const { return _compiled_invocation_count; } |
0 | 368 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
369 #endif // not PRODUCT | |
370 | |
605 | 371 // Clear (non-shared space) pointers which could not be relevant |
0 | 372 // if this (shared) method were mapped into another JVM. |
373 void remove_unshareable_info(); | |
374 | |
375 // nmethod/verified compiler entry | |
376 address verified_code_entry(); | |
377 bool check_code() const; // Not inline to avoid circular ref | |
378 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
379 void clear_code(); // Clear out any compiled code | |
1202 | 380 static void set_code(methodHandle mh, nmethod* code); |
0 | 381 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
382 address get_i2c_entry(); | |
383 address get_c2i_entry(); | |
384 address get_c2i_unverified_entry(); | |
385 AdapterHandlerEntry* adapter() { return _adapter; } | |
386 // setup entry points | |
387 void link_method(methodHandle method, TRAPS); | |
388 // clear entry points. Used by sharing code | |
389 void unlink_method(); | |
390 | |
391 // vtable index | |
392 enum VtableIndexFlag { | |
393 // Valid vtable indexes are non-negative (>= 0). | |
394 // These few negative values are used as sentinels. | |
710 | 395 highest_unused_vtable_index_value = -5, |
0 | 396 invalid_vtable_index = -4, // distinct from any valid vtable index |
397 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
398 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
399 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
400 }; | |
401 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
402 int vtable_index() const { assert(valid_vtable_index(), ""); | |
403 return _vtable_index; } | |
404 void set_vtable_index(int index) { _vtable_index = index; } | |
405 | |
406 // interpreter entry | |
407 address interpreter_entry() const { return _i2i_entry; } | |
408 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
409 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
410 int interpreter_kind(void) { | |
411 return constMethod()->interpreter_kind(); | |
412 } | |
413 void set_interpreter_kind(); | |
414 void set_interpreter_kind(int kind) { | |
415 constMethod()->set_interpreter_kind(kind); | |
416 } | |
417 | |
418 // native function (used for native methods only) | |
419 enum { | |
420 native_bind_event_is_interesting = true | |
421 }; | |
422 address native_function() const { return *(native_function_addr()); } | |
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423 address critical_native_function(); |
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424 |
0 | 425 // Must specify a real function (not NULL). |
426 // Use clear_native_function() to unregister. | |
427 void set_native_function(address function, bool post_event_flag); | |
428 bool has_native_function() const; | |
429 void clear_native_function(); | |
430 | |
431 // signature handler (used for native methods only) | |
432 address signature_handler() const { return *(signature_handler_addr()); } | |
433 void set_signature_handler(address handler); | |
434 | |
435 // Interpreter oopmap support | |
436 void mask_for(int bci, InterpreterOopMap* mask); | |
437 | |
438 #ifndef PRODUCT | |
439 // operations on invocation counter | |
1783 | 440 void print_invocation_count(); |
0 | 441 #endif |
442 | |
443 // byte codes | |
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444 void set_code(address code) { return constMethod()->set_code(code); } |
0 | 445 address code_base() const { return constMethod()->code_base(); } |
446 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
447 | |
448 // prints byte codes | |
449 void print_codes() const { print_codes_on(tty); } | |
450 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
451 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
452 | |
453 // checked exceptions | |
454 int checked_exceptions_length() const | |
455 { return constMethod()->checked_exceptions_length(); } | |
456 CheckedExceptionElement* checked_exceptions_start() const | |
457 { return constMethod()->checked_exceptions_start(); } | |
458 | |
459 // localvariable table | |
460 bool has_localvariable_table() const | |
461 { return constMethod()->has_localvariable_table(); } | |
462 int localvariable_table_length() const | |
463 { return constMethod()->localvariable_table_length(); } | |
464 LocalVariableTableElement* localvariable_table_start() const | |
465 { return constMethod()->localvariable_table_start(); } | |
466 | |
467 bool has_linenumber_table() const | |
468 { return constMethod()->has_linenumber_table(); } | |
469 u_char* compressed_linenumber_table() const | |
470 { return constMethod()->compressed_linenumber_table(); } | |
471 | |
472 // method holder (the klassOop holding this method) | |
473 klassOop method_holder() const { return _constants->pool_holder(); } | |
474 | |
475 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
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476 Symbol* klass_name() const; // returns the name of the method holder |
0 | 477 BasicType result_type() const; // type of the method result |
478 int result_type_index() const; // type index of the method result | |
479 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
480 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
481 | |
482 // Checked exceptions thrown by this method (resolved to mirrors) | |
483 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
484 | |
485 // Access flags | |
486 bool is_public() const { return access_flags().is_public(); } | |
487 bool is_private() const { return access_flags().is_private(); } | |
488 bool is_protected() const { return access_flags().is_protected(); } | |
489 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
490 bool is_static() const { return access_flags().is_static(); } | |
491 bool is_final() const { return access_flags().is_final(); } | |
492 bool is_synchronized() const { return access_flags().is_synchronized();} | |
493 bool is_native() const { return access_flags().is_native(); } | |
494 bool is_abstract() const { return access_flags().is_abstract(); } | |
495 bool is_strict() const { return access_flags().is_strict(); } | |
496 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
497 | |
498 // returns true if contains only return operation | |
499 bool is_empty_method() const; | |
500 | |
501 // returns true if this is a vanilla constructor | |
502 bool is_vanilla_constructor() const; | |
503 | |
504 // checks method and its method holder | |
505 bool is_final_method() const; | |
506 bool is_strict_method() const; | |
507 | |
508 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
509 bool can_be_statically_bound() const; | |
510 | |
511 // returns true if the method has any backward branches. | |
512 bool has_loops() { | |
513 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
514 }; | |
515 | |
516 bool compute_has_loops_flag(); | |
517 | |
518 bool has_jsrs() { | |
519 return access_flags().has_jsrs(); | |
520 }; | |
521 void set_has_jsrs() { | |
522 _access_flags.set_has_jsrs(); | |
523 } | |
524 | |
525 // returns true if the method has any monitors. | |
526 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
527 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
528 | |
529 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
530 | |
531 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
532 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
533 // has not been computed yet. | |
534 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
535 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
536 | |
537 // returns true if the method is an accessor function (setter/getter). | |
538 bool is_accessor() const; | |
539 | |
540 // returns true if the method is an initializer (<init> or <clinit>). | |
541 bool is_initializer() const; | |
542 | |
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543 // returns true if the method is static OR if the classfile version < 51 |
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544 bool has_valid_initializer_flags() const; |
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545 |
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546 // returns true if the method name is <clinit> and the method has |
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547 // valid static initializer flags. |
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548 bool is_static_initializer() const; |
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549 |
0 | 550 // compiled code support |
551 // NOTE: code() is inherently racy as deopt can be clearing code | |
552 // simultaneously. Use with caution. | |
553 bool has_compiled_code() const { return code() != NULL; } | |
554 | |
555 // sizing | |
556 static int object_size(bool is_native); | |
557 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; } | |
558 int object_size() const { return method_size(); } | |
559 | |
560 bool object_is_parsable() const { return method_size() > 0; } | |
561 | |
562 // interpreter support | |
563 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); } | |
564 static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); } | |
565 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); } | |
566 #ifdef CC_INTERP | |
567 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); } | |
568 #endif /* CC_INTERP */ | |
569 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); } | |
570 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); } | |
571 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); } | |
572 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); } | |
573 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); } | |
574 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); } | |
575 static ByteSize method_data_offset() { | |
576 return byte_offset_of(methodOopDesc, _method_data); | |
577 } | |
578 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); } | |
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579 #ifdef GRAAL |
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580 static ByteSize graal_invocation_time_offset() { return byte_offset_of(methodOopDesc, _graal_invocation_time); } |
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581 static ByteSize graal_priority_offset() { return byte_offset_of(methodOopDesc, _graal_priority); } |
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582 #endif |
0 | 583 #ifndef PRODUCT |
584 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); } | |
585 #endif // not PRODUCT | |
586 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); } | |
587 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); } | |
588 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); } | |
589 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); } | |
590 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); } | |
591 | |
592 // for code generation | |
593 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); } | |
594 static int interpreter_invocation_counter_offset_in_bytes() | |
595 { return offset_of(methodOopDesc, _interpreter_invocation_count); } | |
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596 static int intrinsic_id_offset_in_bytes() { return offset_of(methodOopDesc, _intrinsic_id); } |
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597 static int intrinsic_id_size_in_bytes() { return sizeof(u1); } |
0 | 598 |
599 // Static methods that are used to implement member methods where an exposed this pointer | |
600 // is needed due to possible GCs | |
601 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS); | |
602 | |
603 // Returns the byte code index from the byte code pointer | |
604 int bci_from(address bcp) const; | |
605 address bcp_from(int bci) const; | |
606 int validate_bci_from_bcx(intptr_t bcx) const; | |
607 | |
608 // Returns the line number for a bci if debugging information for the method is prowided, | |
609 // -1 is returned otherwise. | |
610 int line_number_from_bci(int bci) const; | |
611 | |
612 // Reflection support | |
613 bool is_overridden_in(klassOop k) const; | |
614 | |
710 | 615 // JSR 292 support |
616 bool is_method_handle_invoke() const { return access_flags().is_method_handle_invoke(); } | |
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617 static bool is_method_handle_invoke_name(vmSymbols::SID name_sid); |
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618 static bool is_method_handle_invoke_name(Symbol* name) { |
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619 return is_method_handle_invoke_name(vmSymbols::find_sid(name)); |
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620 } |
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621 // Tests if this method is an internal adapter frame from the |
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622 // MethodHandleCompiler. |
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623 bool is_method_handle_adapter() const; |
710 | 624 static methodHandle make_invoke_method(KlassHandle holder, |
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625 Symbol* name, //invokeExact or invokeGeneric |
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626 Symbol* signature, //anything at all |
710 | 627 Handle method_type, |
628 TRAPS); | |
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629 static klassOop check_non_bcp_klass(klassOop klass); |
710 | 630 // these operate only on invoke methods: |
631 oop method_handle_type() const; | |
632 static jint* method_type_offsets_chain(); // series of pointer-offsets, terminated by -1 | |
633 // presize interpreter frames for extra interpreter stack entries, if needed | |
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634 // method handles want to be able to push a few extra values (e.g., a bound receiver), and |
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635 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist, |
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636 // all without checking for a stack overflow |
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637 static int extra_stack_entries() { return EnableInvokeDynamic ? (int) MethodHandlePushLimit + 3 : 0; } |
710 | 638 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize() |
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639 |
0 | 640 // RedefineClasses() support: |
641 bool is_old() const { return access_flags().is_old(); } | |
642 void set_is_old() { _access_flags.set_is_old(); } | |
643 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
644 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
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645 // see the definition in methodOop.cpp for the gory details |
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646 bool should_not_be_cached() const; |
0 | 647 |
648 // JVMTI Native method prefixing support: | |
649 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
650 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
651 | |
652 // Rewriting support | |
653 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
654 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
655 | |
656 // Get this method's jmethodID -- allocate if it doesn't exist | |
657 jmethodID jmethod_id() { methodHandle this_h(this); | |
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658 return instanceKlass::get_jmethod_id(method_holder(), this_h); } |
0 | 659 |
660 // Lookup the jmethodID for this method. Return NULL if not found. | |
661 // NOTE that this function can be called from a signal handler | |
662 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
663 // needs to be async-safe. No allocation should be done and | |
664 // so handles are not used to avoid deadlock. | |
665 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); } | |
666 | |
667 // JNI static invoke cached itable index accessors | |
668 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); } | |
669 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); } | |
670 | |
671 // Support for inlining of intrinsic methods | |
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672 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
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673 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
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674 |
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675 // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
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676 void init_intrinsic_id(); // updates from _none if a match |
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677 static vmSymbols::SID klass_id_for_intrinsics(klassOop holder); |
0 | 678 |
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679 bool jfr_towrite() { return _jfr_towrite; } |
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680 void set_jfr_towrite(bool towrite) { _jfr_towrite = towrite; } |
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681 |
0 | 682 // On-stack replacement support |
1783 | 683 bool has_osr_nmethod(int level, bool match_level) { |
684 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; | |
685 } | |
686 | |
687 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { | |
688 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci, level, match_level); | |
689 } | |
0 | 690 |
691 // Inline cache support | |
692 void cleanup_inline_caches(); | |
693 | |
694 // Find if klass for method is loaded | |
695 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
696 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
697 | |
698 // Indicates whether compilation failed earlier for this method, or | |
699 // whether it is not compilable for another reason like having a | |
700 // breakpoint set in it. | |
1783 | 701 bool is_not_compilable(int comp_level = CompLevel_any) const; |
702 void set_not_compilable(int comp_level = CompLevel_all, bool report = true); | |
703 void set_not_compilable_quietly(int comp_level = CompLevel_all) { | |
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704 set_not_compilable(comp_level, false); |
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705 } |
1783 | 706 bool is_not_osr_compilable(int comp_level = CompLevel_any) const { |
707 return is_not_compilable(comp_level) || access_flags().is_not_osr_compilable(); | |
708 } | |
709 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); } | |
710 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } | |
711 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } | |
712 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } | |
713 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } | |
0 | 714 |
715 // Background compilation support | |
1783 | 716 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
717 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
718 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
0 | 719 |
720 // Resolve all classes in signature, return 'true' if successful | |
721 static bool load_signature_classes(methodHandle m, TRAPS); | |
722 | |
723 // Return if true if not all classes references in signature, including return type, has been loaded | |
724 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
725 | |
726 // Printing | |
727 void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM | |
728 void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)" | |
729 | |
730 // Helper routine used for method sorting | |
731 static void sort_methods(objArrayOop methods, | |
732 objArrayOop methods_annotations, | |
733 objArrayOop methods_parameter_annotations, | |
734 objArrayOop methods_default_annotations, | |
735 bool idempotent = false); | |
736 | |
737 // size of parameters | |
738 void set_size_of_parameters(int size) { _size_of_parameters = size; } | |
739 private: | |
740 | |
741 // Inlined elements | |
742 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
743 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
744 | |
745 // Garbage collection support | |
746 oop* adr_constMethod() const { return (oop*)&_constMethod; } | |
747 oop* adr_constants() const { return (oop*)&_constants; } | |
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748 oop* adr_method_data() const { return (oop*)&_method_data; } |
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749 #ifdef GRAAL |
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750 oop* adr_graal_mirror() const { return (oop*)&_graal_mirror; } |
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751 #endif |
0 | 752 }; |
753 | |
754 | |
755 // Utility class for compressing line number tables | |
756 | |
757 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
758 private: | |
759 int _bci; | |
760 int _line; | |
761 public: | |
762 // Constructor | |
763 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
764 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
765 | |
766 // Write (bci, line number) pair to stream | |
767 void write_pair_regular(int bci_delta, int line_delta); | |
768 | |
769 inline void write_pair_inline(int bci, int line) { | |
770 int bci_delta = bci - _bci; | |
771 int line_delta = line - _line; | |
772 _bci = bci; | |
773 _line = line; | |
774 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
775 if (bci_delta == 0 && line_delta == 0) return; | |
776 // Check if bci is 5-bit and line number 3-bit unsigned. | |
777 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
778 // Compress into single byte. | |
779 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
780 // Check that value doesn't match escape character. | |
781 if (value != 0xFF) { | |
782 write_byte(value); | |
783 return; | |
784 } | |
785 } | |
786 write_pair_regular(bci_delta, line_delta); | |
787 } | |
788 | |
789 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
790 // Disabling optimization doesn't work for methods in header files | |
791 // so we force it to call through the non-optimized version in the .cpp. | |
792 // It's gross, but it's the only way we can ensure that all callers are | |
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793 // fixed. _MSC_VER is defined by the windows compiler |
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794 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
0 | 795 void write_pair(int bci, int line); |
796 #else | |
797 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
798 #endif | |
799 | |
800 // Write end-of-stream marker | |
801 void write_terminator() { write_byte(0); } | |
802 }; | |
803 | |
804 | |
805 // Utility class for decompressing line number tables | |
806 | |
807 class CompressedLineNumberReadStream: public CompressedReadStream { | |
808 private: | |
809 int _bci; | |
810 int _line; | |
811 public: | |
812 // Constructor | |
813 CompressedLineNumberReadStream(u_char* buffer); | |
814 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
815 bool read_pair(); | |
816 // Accessing bci and line number (after calling read_pair) | |
817 int bci() const { return _bci; } | |
818 int line() const { return _line; } | |
819 }; | |
820 | |
821 | |
822 /// Fast Breakpoints. | |
823 | |
824 // If this structure gets more complicated (because bpts get numerous), | |
825 // move it into its own header. | |
826 | |
827 // There is presently no provision for concurrent access | |
828 // to breakpoint lists, which is only OK for JVMTI because | |
829 // breakpoints are written only at safepoints, and are read | |
830 // concurrently only outside of safepoints. | |
831 | |
832 class BreakpointInfo : public CHeapObj { | |
833 friend class VMStructs; | |
834 private: | |
835 Bytecodes::Code _orig_bytecode; | |
836 int _bci; | |
837 u2 _name_index; // of method | |
838 u2 _signature_index; // of method | |
839 BreakpointInfo* _next; // simple storage allocation | |
840 | |
841 public: | |
842 BreakpointInfo(methodOop m, int bci); | |
843 | |
844 // accessors | |
845 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
846 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
847 int bci() { return _bci; } | |
848 | |
849 BreakpointInfo* next() const { return _next; } | |
850 void set_next(BreakpointInfo* n) { _next = n; } | |
851 | |
852 // helps for searchers | |
2142 | 853 bool match(const methodOopDesc* m, int bci) { |
0 | 854 return bci == _bci && match(m); |
855 } | |
856 | |
2142 | 857 bool match(const methodOopDesc* m) { |
0 | 858 return _name_index == m->name_index() && |
859 _signature_index == m->signature_index(); | |
860 } | |
861 | |
862 void set(methodOop method); | |
863 void clear(methodOop method); | |
864 }; | |
1972 | 865 |
866 #endif // SHARE_VM_OOPS_METHODOOP_HPP |