Mercurial > hg > graal-compiler
annotate src/share/vm/oops/methodOop.hpp @ 5092:3d91d5d7b166
fixed segv encountered while printing system property with a NULL value
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 16 Mar 2012 18:25:30 +0100 |
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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 // com/oracle/graal/hotspot/HotSpotMethodResolved mirroring this method |
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135 oop _graal_mirror; |
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136 #ifdef TIERED |
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137 jlong _prev_time; // Previous time the rate was acquired |
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138 float _rate; // Events (invocation and backedge counter increments) per millisecond |
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139 #endif |
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140 |
0 | 141 #ifndef PRODUCT |
142 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) | |
143 #endif | |
144 // Entry point for calling both from and to the interpreter. | |
145 address _i2i_entry; // All-args-on-stack calling convention | |
146 // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked. | |
147 AdapterHandlerEntry* _adapter; | |
148 // Entry point for calling from compiled code, to compiled code if it exists | |
149 // or else the interpreter. | |
150 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() | |
151 // The entry point for calling both from and to compiled code is | |
152 // "_code->entry_point()". Because of tiered compilation and de-opt, this | |
153 // field can come and go. It can transition from NULL to not-null at any | |
154 // time (whenever a compile completes). It can transition from not-null to | |
155 // NULL only at safepoints (because of a de-opt). | |
156 nmethod* volatile _code; // Points to the corresponding piece of native code | |
157 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry | |
158 | |
159 public: | |
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160 |
0 | 161 // accessors for instance variables |
162 constMethodOop constMethod() const { return _constMethod; } | |
163 void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); } | |
164 | |
165 | |
166 static address make_adapters(methodHandle mh, TRAPS); | |
167 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
168 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
169 | |
170 // access flag | |
171 AccessFlags access_flags() const { return _access_flags; } | |
172 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
173 | |
174 // name | |
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175 Symbol* name() const { return _constants->symbol_at(name_index()); } |
0 | 176 int name_index() const { return constMethod()->name_index(); } |
177 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
178 | |
179 // signature | |
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180 Symbol* signature() const { return _constants->symbol_at(signature_index()); } |
0 | 181 int signature_index() const { return constMethod()->signature_index(); } |
182 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
183 | |
184 // generics support | |
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185 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (Symbol*)NULL); } |
0 | 186 int generic_signature_index() const { return constMethod()->generic_signature_index(); } |
187 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
188 | |
189 // annotations support | |
190 typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); } | |
191 typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); } | |
192 typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); } | |
193 | |
194 #ifdef CC_INTERP | |
195 void set_result_index(BasicType type); | |
196 int result_index() { return _result_index; } | |
197 #endif | |
198 | |
199 // Helper routine: get klass name + "." + method name + signature as | |
200 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
201 // and fatal error handling. The string is allocated in resource | |
202 // area if a buffer is not provided by the caller. | |
203 char* name_and_sig_as_C_string(); | |
204 char* name_and_sig_as_C_string(char* buf, int size); | |
205 | |
206 // Static routine in the situations we don't have a methodOop | |
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207 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature); |
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208 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size); |
0 | 209 |
2142 | 210 Bytecodes::Code java_code_at(int bci) const { |
211 return Bytecodes::java_code_at(this, bcp_from(bci)); | |
212 } | |
213 Bytecodes::Code code_at(int bci) const { | |
214 return Bytecodes::code_at(this, bcp_from(bci)); | |
215 } | |
216 | |
0 | 217 // JVMTI breakpoints |
2142 | 218 Bytecodes::Code orig_bytecode_at(int bci) const; |
0 | 219 void set_orig_bytecode_at(int bci, Bytecodes::Code code); |
220 void set_breakpoint(int bci); | |
221 void clear_breakpoint(int bci); | |
222 void clear_all_breakpoints(); | |
223 // Tracking number of breakpoints, for fullspeed debugging. | |
224 // Only mutated by VM thread. | |
225 u2 number_of_breakpoints() const { return _number_of_breakpoints; } | |
226 void incr_number_of_breakpoints() { ++_number_of_breakpoints; } | |
227 void decr_number_of_breakpoints() { --_number_of_breakpoints; } | |
228 // Initialization only | |
229 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; } | |
230 | |
231 // index into instanceKlass methods() array | |
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232 // note: also used by jfr |
0 | 233 u2 method_idnum() const { return constMethod()->method_idnum(); } |
234 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
235 | |
236 // code size | |
237 int code_size() const { return constMethod()->code_size(); } | |
238 | |
239 // method size | |
240 int method_size() const { return _method_size; } | |
241 void set_method_size(int size) { | |
242 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
243 _method_size = size; | |
244 } | |
245 | |
246 // constant pool for klassOop holding this method | |
247 constantPoolOop constants() const { return _constants; } | |
248 void set_constants(constantPoolOop c) { oop_store_without_check((oop*)&_constants, c); } | |
249 | |
250 // max stack | |
251 int max_stack() const { return _max_stack; } | |
252 void set_max_stack(int size) { _max_stack = size; } | |
253 | |
254 // max locals | |
255 int max_locals() const { return _max_locals; } | |
256 void set_max_locals(int size) { _max_locals = size; } | |
1783 | 257 |
258 int highest_comp_level() const; | |
259 void set_highest_comp_level(int level); | |
260 int highest_osr_comp_level() const; | |
261 void set_highest_osr_comp_level(int level); | |
0 | 262 |
263 // Count of times method was exited via exception while interpreting | |
264 void interpreter_throwout_increment() { | |
265 if (_interpreter_throwout_count < 65534) { | |
266 _interpreter_throwout_count++; | |
267 } | |
268 } | |
269 | |
270 int interpreter_throwout_count() const { return _interpreter_throwout_count; } | |
271 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; } | |
272 | |
273 // size of parameters | |
274 int size_of_parameters() const { return _size_of_parameters; } | |
275 | |
276 bool has_stackmap_table() const { | |
277 return constMethod()->has_stackmap_table(); | |
278 } | |
279 | |
280 typeArrayOop stackmap_data() const { | |
281 return constMethod()->stackmap_data(); | |
282 } | |
283 | |
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284 void set_stackmap_data(typeArrayOop sd) { |
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285 constMethod()->set_stackmap_data(sd); |
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286 } |
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287 |
0 | 288 // exception handler table |
289 typeArrayOop exception_table() const | |
290 { return constMethod()->exception_table(); } | |
291 void set_exception_table(typeArrayOop e) | |
292 { constMethod()->set_exception_table(e); } | |
293 bool has_exception_handler() const | |
294 { return constMethod()->has_exception_handler(); } | |
295 | |
296 // Finds the first entry point bci of an exception handler for an | |
297 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
298 // for ex_klass indicates that the exception klass is not known; in | |
299 // this case it matches any constraint class. Returns -1 if the | |
300 // exception cannot be handled in this method. The handler | |
301 // constraint classes are loaded if necessary. Note that this may | |
302 // throw an exception if loading of the constraint classes causes | |
303 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
304 // If an exception is thrown, returns the bci of the | |
305 // exception handler which caused the exception to be thrown, which | |
306 // is needed for proper retries. See, for example, | |
307 // InterpreterRuntime::exception_handler_for_exception. | |
308 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS); | |
309 | |
310 // method data access | |
311 methodDataOop method_data() const { | |
312 return _method_data; | |
313 } | |
314 void set_method_data(methodDataOop data) { | |
315 oop_store_without_check((oop*)&_method_data, (oop)data); | |
316 } | |
317 | |
318 // invocation counter | |
1783 | 319 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
320 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
321 | |
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322 #ifdef TIERED |
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323 // We are reusing interpreter_invocation_count as a holder for the previous event count! |
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324 // We can do that since interpreter_invocation_count is not used in tiered. |
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325 int prev_event_count() const { return _interpreter_invocation_count; } |
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326 void set_prev_event_count(int count) { _interpreter_invocation_count = count; } |
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327 jlong prev_time() const { return _prev_time; } |
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328 void set_prev_time(jlong time) { _prev_time = time; } |
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329 float rate() const { return _rate; } |
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330 void set_rate(float rate) { _rate = rate; } |
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331 #endif |
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332 |
1783 | 333 int invocation_count(); |
334 int backedge_count(); | |
335 | |
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336 // graal mirror |
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337 oop graal_mirror() const { return _graal_mirror; } |
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338 void set_graal_mirror(oop m) { oop_store((oop*) &_graal_mirror, m); } |
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339 |
1783 | 340 bool was_executed_more_than(int n); |
341 bool was_never_executed() { return !was_executed_more_than(0); } | |
0 | 342 |
343 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
344 | |
1783 | 345 int interpreter_invocation_count() { |
346 if (TieredCompilation) return invocation_count(); | |
347 else return _interpreter_invocation_count; | |
348 } | |
0 | 349 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; } |
1783 | 350 int increment_interpreter_invocation_count() { |
351 if (TieredCompilation) ShouldNotReachHere(); | |
352 return ++_interpreter_invocation_count; | |
353 } | |
0 | 354 |
355 #ifndef PRODUCT | |
1783 | 356 int compiled_invocation_count() const { return _compiled_invocation_count; } |
0 | 357 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
358 #endif // not PRODUCT | |
359 | |
605 | 360 // Clear (non-shared space) pointers which could not be relevant |
0 | 361 // if this (shared) method were mapped into another JVM. |
362 void remove_unshareable_info(); | |
363 | |
364 // nmethod/verified compiler entry | |
365 address verified_code_entry(); | |
366 bool check_code() const; // Not inline to avoid circular ref | |
367 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
368 void clear_code(); // Clear out any compiled code | |
1202 | 369 static void set_code(methodHandle mh, nmethod* code); |
0 | 370 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
371 address get_i2c_entry(); | |
372 address get_c2i_entry(); | |
373 address get_c2i_unverified_entry(); | |
374 AdapterHandlerEntry* adapter() { return _adapter; } | |
375 // setup entry points | |
376 void link_method(methodHandle method, TRAPS); | |
377 // clear entry points. Used by sharing code | |
378 void unlink_method(); | |
379 | |
380 // vtable index | |
381 enum VtableIndexFlag { | |
382 // Valid vtable indexes are non-negative (>= 0). | |
383 // These few negative values are used as sentinels. | |
710 | 384 highest_unused_vtable_index_value = -5, |
0 | 385 invalid_vtable_index = -4, // distinct from any valid vtable index |
386 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
387 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
388 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
389 }; | |
390 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
391 int vtable_index() const { assert(valid_vtable_index(), ""); | |
392 return _vtable_index; } | |
393 void set_vtable_index(int index) { _vtable_index = index; } | |
394 | |
395 // interpreter entry | |
396 address interpreter_entry() const { return _i2i_entry; } | |
397 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
398 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
399 int interpreter_kind(void) { | |
400 return constMethod()->interpreter_kind(); | |
401 } | |
402 void set_interpreter_kind(); | |
403 void set_interpreter_kind(int kind) { | |
404 constMethod()->set_interpreter_kind(kind); | |
405 } | |
406 | |
407 // native function (used for native methods only) | |
408 enum { | |
409 native_bind_event_is_interesting = true | |
410 }; | |
411 address native_function() const { return *(native_function_addr()); } | |
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412 address critical_native_function(); |
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413 |
0 | 414 // Must specify a real function (not NULL). |
415 // Use clear_native_function() to unregister. | |
416 void set_native_function(address function, bool post_event_flag); | |
417 bool has_native_function() const; | |
418 void clear_native_function(); | |
419 | |
420 // signature handler (used for native methods only) | |
421 address signature_handler() const { return *(signature_handler_addr()); } | |
422 void set_signature_handler(address handler); | |
423 | |
424 // Interpreter oopmap support | |
425 void mask_for(int bci, InterpreterOopMap* mask); | |
426 | |
427 #ifndef PRODUCT | |
428 // operations on invocation counter | |
1783 | 429 void print_invocation_count(); |
0 | 430 #endif |
431 | |
432 // byte codes | |
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433 void set_code(address code) { return constMethod()->set_code(code); } |
0 | 434 address code_base() const { return constMethod()->code_base(); } |
435 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
436 | |
437 // prints byte codes | |
438 void print_codes() const { print_codes_on(tty); } | |
439 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
440 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
441 | |
442 // checked exceptions | |
443 int checked_exceptions_length() const | |
444 { return constMethod()->checked_exceptions_length(); } | |
445 CheckedExceptionElement* checked_exceptions_start() const | |
446 { return constMethod()->checked_exceptions_start(); } | |
447 | |
448 // localvariable table | |
449 bool has_localvariable_table() const | |
450 { return constMethod()->has_localvariable_table(); } | |
451 int localvariable_table_length() const | |
452 { return constMethod()->localvariable_table_length(); } | |
453 LocalVariableTableElement* localvariable_table_start() const | |
454 { return constMethod()->localvariable_table_start(); } | |
455 | |
456 bool has_linenumber_table() const | |
457 { return constMethod()->has_linenumber_table(); } | |
458 u_char* compressed_linenumber_table() const | |
459 { return constMethod()->compressed_linenumber_table(); } | |
460 | |
461 // method holder (the klassOop holding this method) | |
462 klassOop method_holder() const { return _constants->pool_holder(); } | |
463 | |
464 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
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465 Symbol* klass_name() const; // returns the name of the method holder |
0 | 466 BasicType result_type() const; // type of the method result |
467 int result_type_index() const; // type index of the method result | |
468 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
469 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
470 | |
471 // Checked exceptions thrown by this method (resolved to mirrors) | |
472 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
473 | |
474 // Access flags | |
475 bool is_public() const { return access_flags().is_public(); } | |
476 bool is_private() const { return access_flags().is_private(); } | |
477 bool is_protected() const { return access_flags().is_protected(); } | |
478 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
479 bool is_static() const { return access_flags().is_static(); } | |
480 bool is_final() const { return access_flags().is_final(); } | |
481 bool is_synchronized() const { return access_flags().is_synchronized();} | |
482 bool is_native() const { return access_flags().is_native(); } | |
483 bool is_abstract() const { return access_flags().is_abstract(); } | |
484 bool is_strict() const { return access_flags().is_strict(); } | |
485 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
486 | |
487 // returns true if contains only return operation | |
488 bool is_empty_method() const; | |
489 | |
490 // returns true if this is a vanilla constructor | |
491 bool is_vanilla_constructor() const; | |
492 | |
493 // checks method and its method holder | |
494 bool is_final_method() const; | |
495 bool is_strict_method() const; | |
496 | |
497 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
498 bool can_be_statically_bound() const; | |
499 | |
500 // returns true if the method has any backward branches. | |
501 bool has_loops() { | |
502 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
503 }; | |
504 | |
505 bool compute_has_loops_flag(); | |
506 | |
507 bool has_jsrs() { | |
508 return access_flags().has_jsrs(); | |
509 }; | |
510 void set_has_jsrs() { | |
511 _access_flags.set_has_jsrs(); | |
512 } | |
513 | |
514 // returns true if the method has any monitors. | |
515 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
516 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
517 | |
518 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
519 | |
520 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
521 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
522 // has not been computed yet. | |
523 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
524 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
525 | |
526 // returns true if the method is an accessor function (setter/getter). | |
527 bool is_accessor() const; | |
528 | |
529 // returns true if the method is an initializer (<init> or <clinit>). | |
530 bool is_initializer() const; | |
531 | |
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532 // returns true if the method is static OR if the classfile version < 51 |
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533 bool has_valid_initializer_flags() const; |
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534 |
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535 // returns true if the method name is <clinit> and the method has |
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536 // valid static initializer flags. |
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537 bool is_static_initializer() const; |
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538 |
0 | 539 // compiled code support |
540 // NOTE: code() is inherently racy as deopt can be clearing code | |
541 // simultaneously. Use with caution. | |
542 bool has_compiled_code() const { return code() != NULL; } | |
543 | |
544 // sizing | |
545 static int object_size(bool is_native); | |
546 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; } | |
547 int object_size() const { return method_size(); } | |
548 | |
549 bool object_is_parsable() const { return method_size() > 0; } | |
550 | |
551 // interpreter support | |
552 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); } | |
553 static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); } | |
554 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); } | |
555 #ifdef CC_INTERP | |
556 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); } | |
557 #endif /* CC_INTERP */ | |
558 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); } | |
559 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); } | |
560 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); } | |
561 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); } | |
562 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); } | |
563 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); } | |
564 static ByteSize method_data_offset() { | |
565 return byte_offset_of(methodOopDesc, _method_data); | |
566 } | |
567 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); } | |
568 #ifndef PRODUCT | |
569 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); } | |
570 #endif // not PRODUCT | |
571 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); } | |
572 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); } | |
573 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); } | |
574 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); } | |
575 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); } | |
576 | |
577 // for code generation | |
578 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); } | |
579 static int interpreter_invocation_counter_offset_in_bytes() | |
580 { return offset_of(methodOopDesc, _interpreter_invocation_count); } | |
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581 static int intrinsic_id_offset_in_bytes() { return offset_of(methodOopDesc, _intrinsic_id); } |
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582 static int intrinsic_id_size_in_bytes() { return sizeof(u1); } |
0 | 583 |
584 // Static methods that are used to implement member methods where an exposed this pointer | |
585 // is needed due to possible GCs | |
586 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS); | |
587 | |
588 // Returns the byte code index from the byte code pointer | |
589 int bci_from(address bcp) const; | |
590 address bcp_from(int bci) const; | |
591 int validate_bci_from_bcx(intptr_t bcx) const; | |
592 | |
593 // Returns the line number for a bci if debugging information for the method is prowided, | |
594 // -1 is returned otherwise. | |
595 int line_number_from_bci(int bci) const; | |
596 | |
597 // Reflection support | |
598 bool is_overridden_in(klassOop k) const; | |
599 | |
710 | 600 // JSR 292 support |
601 bool is_method_handle_invoke() const { return access_flags().is_method_handle_invoke(); } | |
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602 static bool is_method_handle_invoke_name(vmSymbols::SID name_sid); |
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603 static bool is_method_handle_invoke_name(Symbol* name) { |
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604 return is_method_handle_invoke_name(vmSymbols::find_sid(name)); |
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605 } |
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606 // Tests if this method is an internal adapter frame from the |
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607 // MethodHandleCompiler. |
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608 bool is_method_handle_adapter() const; |
710 | 609 static methodHandle make_invoke_method(KlassHandle holder, |
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610 Symbol* name, //invokeExact or invokeGeneric |
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611 Symbol* signature, //anything at all |
710 | 612 Handle method_type, |
613 TRAPS); | |
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614 static klassOop check_non_bcp_klass(klassOop klass); |
710 | 615 // these operate only on invoke methods: |
616 oop method_handle_type() const; | |
617 static jint* method_type_offsets_chain(); // series of pointer-offsets, terminated by -1 | |
618 // presize interpreter frames for extra interpreter stack entries, if needed | |
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619 // method handles want to be able to push a few extra values (e.g., a bound receiver), and |
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620 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist, |
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621 // all without checking for a stack overflow |
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622 static int extra_stack_entries() { return EnableInvokeDynamic ? (int) MethodHandlePushLimit + 3 : 0; } |
710 | 623 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize() |
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624 |
0 | 625 // RedefineClasses() support: |
626 bool is_old() const { return access_flags().is_old(); } | |
627 void set_is_old() { _access_flags.set_is_old(); } | |
628 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
629 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
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630 // see the definition in methodOop.cpp for the gory details |
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631 bool should_not_be_cached() const; |
0 | 632 |
633 // JVMTI Native method prefixing support: | |
634 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
635 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
636 | |
637 // Rewriting support | |
638 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
639 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
640 | |
641 // Get this method's jmethodID -- allocate if it doesn't exist | |
642 jmethodID jmethod_id() { methodHandle this_h(this); | |
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643 return instanceKlass::get_jmethod_id(method_holder(), this_h); } |
0 | 644 |
645 // Lookup the jmethodID for this method. Return NULL if not found. | |
646 // NOTE that this function can be called from a signal handler | |
647 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
648 // needs to be async-safe. No allocation should be done and | |
649 // so handles are not used to avoid deadlock. | |
650 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); } | |
651 | |
652 // JNI static invoke cached itable index accessors | |
653 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); } | |
654 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); } | |
655 | |
656 // Support for inlining of intrinsic methods | |
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657 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
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658 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
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659 |
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660 // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
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661 void init_intrinsic_id(); // updates from _none if a match |
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662 static vmSymbols::SID klass_id_for_intrinsics(klassOop holder); |
0 | 663 |
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664 bool jfr_towrite() { return _jfr_towrite; } |
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665 void set_jfr_towrite(bool towrite) { _jfr_towrite = towrite; } |
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666 |
0 | 667 // On-stack replacement support |
1783 | 668 bool has_osr_nmethod(int level, bool match_level) { |
669 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; | |
670 } | |
671 | |
672 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { | |
673 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci, level, match_level); | |
674 } | |
0 | 675 |
676 // Inline cache support | |
677 void cleanup_inline_caches(); | |
678 | |
679 // Find if klass for method is loaded | |
680 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
681 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
682 | |
683 // Indicates whether compilation failed earlier for this method, or | |
684 // whether it is not compilable for another reason like having a | |
685 // breakpoint set in it. | |
1783 | 686 bool is_not_compilable(int comp_level = CompLevel_any) const; |
687 void set_not_compilable(int comp_level = CompLevel_all, bool report = true); | |
688 void set_not_compilable_quietly(int comp_level = CompLevel_all) { | |
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689 set_not_compilable(comp_level, false); |
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690 } |
1783 | 691 bool is_not_osr_compilable(int comp_level = CompLevel_any) const { |
692 return is_not_compilable(comp_level) || access_flags().is_not_osr_compilable(); | |
693 } | |
694 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); } | |
695 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } | |
696 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } | |
697 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } | |
698 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } | |
0 | 699 |
700 // Background compilation support | |
1783 | 701 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
702 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
703 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
0 | 704 |
705 // Resolve all classes in signature, return 'true' if successful | |
706 static bool load_signature_classes(methodHandle m, TRAPS); | |
707 | |
708 // Return if true if not all classes references in signature, including return type, has been loaded | |
709 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
710 | |
711 // Printing | |
712 void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM | |
713 void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)" | |
714 | |
715 // Helper routine used for method sorting | |
716 static void sort_methods(objArrayOop methods, | |
717 objArrayOop methods_annotations, | |
718 objArrayOop methods_parameter_annotations, | |
719 objArrayOop methods_default_annotations, | |
720 bool idempotent = false); | |
721 | |
722 // size of parameters | |
723 void set_size_of_parameters(int size) { _size_of_parameters = size; } | |
724 private: | |
725 | |
726 // Inlined elements | |
727 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
728 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
729 | |
730 // Garbage collection support | |
731 oop* adr_constMethod() const { return (oop*)&_constMethod; } | |
732 oop* adr_constants() const { return (oop*)&_constants; } | |
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733 oop* adr_graal_mirror() const { return (oop*)&_graal_mirror; } |
0 | 734 oop* adr_method_data() const { return (oop*)&_method_data; } |
735 }; | |
736 | |
737 | |
738 // Utility class for compressing line number tables | |
739 | |
740 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
741 private: | |
742 int _bci; | |
743 int _line; | |
744 public: | |
745 // Constructor | |
746 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
747 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
748 | |
749 // Write (bci, line number) pair to stream | |
750 void write_pair_regular(int bci_delta, int line_delta); | |
751 | |
752 inline void write_pair_inline(int bci, int line) { | |
753 int bci_delta = bci - _bci; | |
754 int line_delta = line - _line; | |
755 _bci = bci; | |
756 _line = line; | |
757 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
758 if (bci_delta == 0 && line_delta == 0) return; | |
759 // Check if bci is 5-bit and line number 3-bit unsigned. | |
760 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
761 // Compress into single byte. | |
762 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
763 // Check that value doesn't match escape character. | |
764 if (value != 0xFF) { | |
765 write_byte(value); | |
766 return; | |
767 } | |
768 } | |
769 write_pair_regular(bci_delta, line_delta); | |
770 } | |
771 | |
772 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
773 // Disabling optimization doesn't work for methods in header files | |
774 // so we force it to call through the non-optimized version in the .cpp. | |
775 // It's gross, but it's the only way we can ensure that all callers are | |
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776 // fixed. _MSC_VER is defined by the windows compiler |
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777 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
0 | 778 void write_pair(int bci, int line); |
779 #else | |
780 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
781 #endif | |
782 | |
783 // Write end-of-stream marker | |
784 void write_terminator() { write_byte(0); } | |
785 }; | |
786 | |
787 | |
788 // Utility class for decompressing line number tables | |
789 | |
790 class CompressedLineNumberReadStream: public CompressedReadStream { | |
791 private: | |
792 int _bci; | |
793 int _line; | |
794 public: | |
795 // Constructor | |
796 CompressedLineNumberReadStream(u_char* buffer); | |
797 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
798 bool read_pair(); | |
799 // Accessing bci and line number (after calling read_pair) | |
800 int bci() const { return _bci; } | |
801 int line() const { return _line; } | |
802 }; | |
803 | |
804 | |
805 /// Fast Breakpoints. | |
806 | |
807 // If this structure gets more complicated (because bpts get numerous), | |
808 // move it into its own header. | |
809 | |
810 // There is presently no provision for concurrent access | |
811 // to breakpoint lists, which is only OK for JVMTI because | |
812 // breakpoints are written only at safepoints, and are read | |
813 // concurrently only outside of safepoints. | |
814 | |
815 class BreakpointInfo : public CHeapObj { | |
816 friend class VMStructs; | |
817 private: | |
818 Bytecodes::Code _orig_bytecode; | |
819 int _bci; | |
820 u2 _name_index; // of method | |
821 u2 _signature_index; // of method | |
822 BreakpointInfo* _next; // simple storage allocation | |
823 | |
824 public: | |
825 BreakpointInfo(methodOop m, int bci); | |
826 | |
827 // accessors | |
828 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
829 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
830 int bci() { return _bci; } | |
831 | |
832 BreakpointInfo* next() const { return _next; } | |
833 void set_next(BreakpointInfo* n) { _next = n; } | |
834 | |
835 // helps for searchers | |
2142 | 836 bool match(const methodOopDesc* m, int bci) { |
0 | 837 return bci == _bci && match(m); |
838 } | |
839 | |
2142 | 840 bool match(const methodOopDesc* m) { |
0 | 841 return _name_index == m->name_index() && |
842 _signature_index == m->signature_index(); | |
843 } | |
844 | |
845 void set(methodOop method); | |
846 void clear(methodOop method); | |
847 }; | |
1972 | 848 |
849 #endif // SHARE_VM_OOPS_METHODOOP_HPP |