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annotate src/share/vm/oops/methodOop.hpp @ 2137:ffd725ff6943
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author | johnc |
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date | Thu, 13 Jan 2011 17:19:21 -0800 |
parents | f95d63e2154a |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2010, 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 // |------------------------------------------------------| | |
1783 | 80 // | intrinsic_id, (unused) | throwout_count | |
0 | 81 // |------------------------------------------------------| |
1783 | 82 // | num_breakpoints | (unused) | |
0 | 83 // |------------------------------------------------------| |
84 // | invocation_counter | | |
85 // | backedge_counter | | |
86 // |------------------------------------------------------| | |
87 // | code (pointer) | | |
88 // | i2i (pointer) | | |
89 // | adapter (pointer) | | |
90 // | from_compiled_entry (pointer) | | |
91 // | from_interpreted_entry (pointer) | | |
92 // |------------------------------------------------------| | |
93 // | native_function (present only if native) | | |
94 // | signature_handler (present only if native) | | |
95 // |------------------------------------------------------| | |
96 | |
97 | |
98 class CheckedExceptionElement; | |
99 class LocalVariableTableElement; | |
100 class AdapterHandlerEntry; | |
101 class methodDataOopDesc; | |
102 | |
103 class methodOopDesc : public oopDesc { | |
104 friend class methodKlass; | |
105 friend class VMStructs; | |
106 private: | |
107 constMethodOop _constMethod; // Method read-only data. | |
108 constantPoolOop _constants; // Constant pool | |
109 methodDataOop _method_data; | |
1783 | 110 int _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered) |
0 | 111 AccessFlags _access_flags; // Access flags |
112 int _vtable_index; // vtable index of this method (see VtableIndexFlag) | |
113 // note: can have vtables with >2**16 elements (because of inheritance) | |
114 #ifdef CC_INTERP | |
115 int _result_index; // C++ interpreter needs for converting results to/from stack | |
116 #endif | |
117 u2 _method_size; // size of this object | |
118 u2 _max_stack; // Maximum number of entries on the expression stack | |
119 u2 _max_locals; // Number of local variables used by this method | |
120 u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words | |
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121 u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none) |
0 | 122 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting |
123 u2 _number_of_breakpoints; // fullspeed debugging support | |
124 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations | |
125 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations | |
1783 | 126 |
0 | 127 #ifndef PRODUCT |
128 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) | |
129 #endif | |
130 // Entry point for calling both from and to the interpreter. | |
131 address _i2i_entry; // All-args-on-stack calling convention | |
132 // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked. | |
133 AdapterHandlerEntry* _adapter; | |
134 // Entry point for calling from compiled code, to compiled code if it exists | |
135 // or else the interpreter. | |
136 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() | |
137 // The entry point for calling both from and to compiled code is | |
138 // "_code->entry_point()". Because of tiered compilation and de-opt, this | |
139 // field can come and go. It can transition from NULL to not-null at any | |
140 // time (whenever a compile completes). It can transition from not-null to | |
141 // NULL only at safepoints (because of a de-opt). | |
142 nmethod* volatile _code; // Points to the corresponding piece of native code | |
143 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry | |
144 | |
145 public: | |
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146 |
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147 static const bool IsUnsafeConc = false; |
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148 static const bool IsSafeConc = true; |
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149 |
0 | 150 // accessors for instance variables |
151 constMethodOop constMethod() const { return _constMethod; } | |
152 void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); } | |
153 | |
154 | |
155 static address make_adapters(methodHandle mh, TRAPS); | |
156 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
157 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
158 | |
159 // access flag | |
160 AccessFlags access_flags() const { return _access_flags; } | |
161 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
162 | |
163 // name | |
164 symbolOop name() const { return _constants->symbol_at(name_index()); } | |
165 int name_index() const { return constMethod()->name_index(); } | |
166 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
167 | |
168 // signature | |
169 symbolOop signature() const { return _constants->symbol_at(signature_index()); } | |
170 int signature_index() const { return constMethod()->signature_index(); } | |
171 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
172 | |
173 // generics support | |
174 symbolOop generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (symbolOop)NULL); } | |
175 int generic_signature_index() const { return constMethod()->generic_signature_index(); } | |
176 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
177 | |
178 // annotations support | |
179 typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); } | |
180 typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); } | |
181 typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); } | |
182 | |
183 #ifdef CC_INTERP | |
184 void set_result_index(BasicType type); | |
185 int result_index() { return _result_index; } | |
186 #endif | |
187 | |
188 // Helper routine: get klass name + "." + method name + signature as | |
189 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
190 // and fatal error handling. The string is allocated in resource | |
191 // area if a buffer is not provided by the caller. | |
192 char* name_and_sig_as_C_string(); | |
193 char* name_and_sig_as_C_string(char* buf, int size); | |
194 | |
195 // Static routine in the situations we don't have a methodOop | |
196 static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature); | |
197 static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature, char* buf, int size); | |
198 | |
199 // JVMTI breakpoints | |
200 Bytecodes::Code orig_bytecode_at(int bci); | |
201 void set_orig_bytecode_at(int bci, Bytecodes::Code code); | |
202 void set_breakpoint(int bci); | |
203 void clear_breakpoint(int bci); | |
204 void clear_all_breakpoints(); | |
205 // Tracking number of breakpoints, for fullspeed debugging. | |
206 // Only mutated by VM thread. | |
207 u2 number_of_breakpoints() const { return _number_of_breakpoints; } | |
208 void incr_number_of_breakpoints() { ++_number_of_breakpoints; } | |
209 void decr_number_of_breakpoints() { --_number_of_breakpoints; } | |
210 // Initialization only | |
211 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; } | |
212 | |
213 // index into instanceKlass methods() array | |
214 u2 method_idnum() const { return constMethod()->method_idnum(); } | |
215 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
216 | |
217 // code size | |
218 int code_size() const { return constMethod()->code_size(); } | |
219 | |
220 // method size | |
221 int method_size() const { return _method_size; } | |
222 void set_method_size(int size) { | |
223 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
224 _method_size = size; | |
225 } | |
226 | |
227 // constant pool for klassOop holding this method | |
228 constantPoolOop constants() const { return _constants; } | |
229 void set_constants(constantPoolOop c) { oop_store_without_check((oop*)&_constants, c); } | |
230 | |
231 // max stack | |
232 int max_stack() const { return _max_stack; } | |
233 void set_max_stack(int size) { _max_stack = size; } | |
234 | |
235 // max locals | |
236 int max_locals() const { return _max_locals; } | |
237 void set_max_locals(int size) { _max_locals = size; } | |
1783 | 238 |
239 int highest_comp_level() const; | |
240 void set_highest_comp_level(int level); | |
241 int highest_osr_comp_level() const; | |
242 void set_highest_osr_comp_level(int level); | |
0 | 243 |
244 // Count of times method was exited via exception while interpreting | |
245 void interpreter_throwout_increment() { | |
246 if (_interpreter_throwout_count < 65534) { | |
247 _interpreter_throwout_count++; | |
248 } | |
249 } | |
250 | |
251 int interpreter_throwout_count() const { return _interpreter_throwout_count; } | |
252 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; } | |
253 | |
254 // size of parameters | |
255 int size_of_parameters() const { return _size_of_parameters; } | |
256 | |
257 bool has_stackmap_table() const { | |
258 return constMethod()->has_stackmap_table(); | |
259 } | |
260 | |
261 typeArrayOop stackmap_data() const { | |
262 return constMethod()->stackmap_data(); | |
263 } | |
264 | |
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265 void set_stackmap_data(typeArrayOop sd) { |
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266 constMethod()->set_stackmap_data(sd); |
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267 } |
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268 |
0 | 269 // exception handler table |
270 typeArrayOop exception_table() const | |
271 { return constMethod()->exception_table(); } | |
272 void set_exception_table(typeArrayOop e) | |
273 { constMethod()->set_exception_table(e); } | |
274 bool has_exception_handler() const | |
275 { return constMethod()->has_exception_handler(); } | |
276 | |
277 // Finds the first entry point bci of an exception handler for an | |
278 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
279 // for ex_klass indicates that the exception klass is not known; in | |
280 // this case it matches any constraint class. Returns -1 if the | |
281 // exception cannot be handled in this method. The handler | |
282 // constraint classes are loaded if necessary. Note that this may | |
283 // throw an exception if loading of the constraint classes causes | |
284 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
285 // If an exception is thrown, returns the bci of the | |
286 // exception handler which caused the exception to be thrown, which | |
287 // is needed for proper retries. See, for example, | |
288 // InterpreterRuntime::exception_handler_for_exception. | |
289 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS); | |
290 | |
291 // method data access | |
292 methodDataOop method_data() const { | |
293 return _method_data; | |
294 } | |
295 void set_method_data(methodDataOop data) { | |
296 oop_store_without_check((oop*)&_method_data, (oop)data); | |
297 } | |
298 | |
299 // invocation counter | |
1783 | 300 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
301 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
302 | |
303 int invocation_count(); | |
304 int backedge_count(); | |
305 | |
306 bool was_executed_more_than(int n); | |
307 bool was_never_executed() { return !was_executed_more_than(0); } | |
0 | 308 |
309 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
310 | |
1783 | 311 int interpreter_invocation_count() { |
312 if (TieredCompilation) return invocation_count(); | |
313 else return _interpreter_invocation_count; | |
314 } | |
0 | 315 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; } |
1783 | 316 int increment_interpreter_invocation_count() { |
317 if (TieredCompilation) ShouldNotReachHere(); | |
318 return ++_interpreter_invocation_count; | |
319 } | |
0 | 320 |
321 #ifndef PRODUCT | |
1783 | 322 int compiled_invocation_count() const { return _compiled_invocation_count; } |
0 | 323 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
324 #endif // not PRODUCT | |
325 | |
605 | 326 // Clear (non-shared space) pointers which could not be relevant |
0 | 327 // if this (shared) method were mapped into another JVM. |
328 void remove_unshareable_info(); | |
329 | |
330 // nmethod/verified compiler entry | |
331 address verified_code_entry(); | |
332 bool check_code() const; // Not inline to avoid circular ref | |
333 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
334 void clear_code(); // Clear out any compiled code | |
1202 | 335 static void set_code(methodHandle mh, nmethod* code); |
0 | 336 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
337 address get_i2c_entry(); | |
338 address get_c2i_entry(); | |
339 address get_c2i_unverified_entry(); | |
340 AdapterHandlerEntry* adapter() { return _adapter; } | |
341 // setup entry points | |
342 void link_method(methodHandle method, TRAPS); | |
343 // clear entry points. Used by sharing code | |
344 void unlink_method(); | |
345 | |
346 // vtable index | |
347 enum VtableIndexFlag { | |
348 // Valid vtable indexes are non-negative (>= 0). | |
349 // These few negative values are used as sentinels. | |
710 | 350 highest_unused_vtable_index_value = -5, |
0 | 351 invalid_vtable_index = -4, // distinct from any valid vtable index |
352 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
353 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
354 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
355 }; | |
356 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
357 int vtable_index() const { assert(valid_vtable_index(), ""); | |
358 return _vtable_index; } | |
359 void set_vtable_index(int index) { _vtable_index = index; } | |
360 | |
361 // interpreter entry | |
362 address interpreter_entry() const { return _i2i_entry; } | |
363 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
364 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
365 int interpreter_kind(void) { | |
366 return constMethod()->interpreter_kind(); | |
367 } | |
368 void set_interpreter_kind(); | |
369 void set_interpreter_kind(int kind) { | |
370 constMethod()->set_interpreter_kind(kind); | |
371 } | |
372 | |
373 // native function (used for native methods only) | |
374 enum { | |
375 native_bind_event_is_interesting = true | |
376 }; | |
377 address native_function() const { return *(native_function_addr()); } | |
378 // Must specify a real function (not NULL). | |
379 // Use clear_native_function() to unregister. | |
380 void set_native_function(address function, bool post_event_flag); | |
381 bool has_native_function() const; | |
382 void clear_native_function(); | |
383 | |
384 // signature handler (used for native methods only) | |
385 address signature_handler() const { return *(signature_handler_addr()); } | |
386 void set_signature_handler(address handler); | |
387 | |
388 // Interpreter oopmap support | |
389 void mask_for(int bci, InterpreterOopMap* mask); | |
390 | |
391 #ifndef PRODUCT | |
392 // operations on invocation counter | |
1783 | 393 void print_invocation_count(); |
0 | 394 #endif |
395 | |
396 // byte codes | |
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397 void set_code(address code) { return constMethod()->set_code(code); } |
0 | 398 address code_base() const { return constMethod()->code_base(); } |
399 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
400 | |
401 // prints byte codes | |
402 void print_codes() const { print_codes_on(tty); } | |
403 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
404 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
405 | |
406 // checked exceptions | |
407 int checked_exceptions_length() const | |
408 { return constMethod()->checked_exceptions_length(); } | |
409 CheckedExceptionElement* checked_exceptions_start() const | |
410 { return constMethod()->checked_exceptions_start(); } | |
411 | |
412 // localvariable table | |
413 bool has_localvariable_table() const | |
414 { return constMethod()->has_localvariable_table(); } | |
415 int localvariable_table_length() const | |
416 { return constMethod()->localvariable_table_length(); } | |
417 LocalVariableTableElement* localvariable_table_start() const | |
418 { return constMethod()->localvariable_table_start(); } | |
419 | |
420 bool has_linenumber_table() const | |
421 { return constMethod()->has_linenumber_table(); } | |
422 u_char* compressed_linenumber_table() const | |
423 { return constMethod()->compressed_linenumber_table(); } | |
424 | |
425 // method holder (the klassOop holding this method) | |
426 klassOop method_holder() const { return _constants->pool_holder(); } | |
427 | |
428 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
429 symbolOop klass_name() const; // returns the name of the method holder | |
430 BasicType result_type() const; // type of the method result | |
431 int result_type_index() const; // type index of the method result | |
432 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
433 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
434 | |
435 // Checked exceptions thrown by this method (resolved to mirrors) | |
436 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
437 | |
438 // Access flags | |
439 bool is_public() const { return access_flags().is_public(); } | |
440 bool is_private() const { return access_flags().is_private(); } | |
441 bool is_protected() const { return access_flags().is_protected(); } | |
442 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
443 bool is_static() const { return access_flags().is_static(); } | |
444 bool is_final() const { return access_flags().is_final(); } | |
445 bool is_synchronized() const { return access_flags().is_synchronized();} | |
446 bool is_native() const { return access_flags().is_native(); } | |
447 bool is_abstract() const { return access_flags().is_abstract(); } | |
448 bool is_strict() const { return access_flags().is_strict(); } | |
449 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
450 | |
451 // returns true if contains only return operation | |
452 bool is_empty_method() const; | |
453 | |
454 // returns true if this is a vanilla constructor | |
455 bool is_vanilla_constructor() const; | |
456 | |
457 // checks method and its method holder | |
458 bool is_final_method() const; | |
459 bool is_strict_method() const; | |
460 | |
461 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
462 bool can_be_statically_bound() const; | |
463 | |
464 // returns true if the method has any backward branches. | |
465 bool has_loops() { | |
466 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
467 }; | |
468 | |
469 bool compute_has_loops_flag(); | |
470 | |
471 bool has_jsrs() { | |
472 return access_flags().has_jsrs(); | |
473 }; | |
474 void set_has_jsrs() { | |
475 _access_flags.set_has_jsrs(); | |
476 } | |
477 | |
478 // returns true if the method has any monitors. | |
479 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
480 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
481 | |
482 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
483 | |
484 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
485 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
486 // has not been computed yet. | |
487 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
488 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
489 | |
490 // returns true if the method is an accessor function (setter/getter). | |
491 bool is_accessor() const; | |
492 | |
493 // returns true if the method is an initializer (<init> or <clinit>). | |
494 bool is_initializer() const; | |
495 | |
496 // compiled code support | |
497 // NOTE: code() is inherently racy as deopt can be clearing code | |
498 // simultaneously. Use with caution. | |
499 bool has_compiled_code() const { return code() != NULL; } | |
500 | |
501 // sizing | |
502 static int object_size(bool is_native); | |
503 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; } | |
504 int object_size() const { return method_size(); } | |
505 | |
506 bool object_is_parsable() const { return method_size() > 0; } | |
507 | |
508 // interpreter support | |
509 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); } | |
510 static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); } | |
511 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); } | |
512 #ifdef CC_INTERP | |
513 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); } | |
514 #endif /* CC_INTERP */ | |
515 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); } | |
516 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); } | |
517 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); } | |
518 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); } | |
519 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); } | |
520 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); } | |
521 static ByteSize method_data_offset() { | |
522 return byte_offset_of(methodOopDesc, _method_data); | |
523 } | |
524 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); } | |
525 #ifndef PRODUCT | |
526 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); } | |
527 #endif // not PRODUCT | |
528 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); } | |
529 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); } | |
530 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); } | |
531 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); } | |
532 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); } | |
533 | |
534 // for code generation | |
535 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); } | |
536 static int interpreter_invocation_counter_offset_in_bytes() | |
537 { return offset_of(methodOopDesc, _interpreter_invocation_count); } | |
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538 static int intrinsic_id_offset_in_bytes() { return offset_of(methodOopDesc, _intrinsic_id); } |
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539 static int intrinsic_id_size_in_bytes() { return sizeof(u1); } |
0 | 540 |
541 // Static methods that are used to implement member methods where an exposed this pointer | |
542 // is needed due to possible GCs | |
543 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS); | |
544 | |
545 // Returns the byte code index from the byte code pointer | |
546 int bci_from(address bcp) const; | |
547 address bcp_from(int bci) const; | |
548 int validate_bci_from_bcx(intptr_t bcx) const; | |
549 | |
550 // Returns the line number for a bci if debugging information for the method is prowided, | |
551 // -1 is returned otherwise. | |
552 int line_number_from_bci(int bci) const; | |
553 | |
554 // Reflection support | |
555 bool is_overridden_in(klassOop k) const; | |
556 | |
710 | 557 // JSR 292 support |
558 bool is_method_handle_invoke() const { return access_flags().is_method_handle_invoke(); } | |
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559 static bool is_method_handle_invoke_name(vmSymbols::SID name_sid); |
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560 static bool is_method_handle_invoke_name(symbolOop name) { |
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561 return is_method_handle_invoke_name(vmSymbols::find_sid(name)); |
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562 } |
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563 // Tests if this method is an internal adapter frame from the |
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564 // MethodHandleCompiler. |
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565 bool is_method_handle_adapter() const; |
710 | 566 static methodHandle make_invoke_method(KlassHandle holder, |
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567 symbolHandle name, //invokeExact or invokeGeneric |
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568 symbolHandle signature, //anything at all |
710 | 569 Handle method_type, |
570 TRAPS); | |
571 // these operate only on invoke methods: | |
572 oop method_handle_type() const; | |
573 static jint* method_type_offsets_chain(); // series of pointer-offsets, terminated by -1 | |
574 // presize interpreter frames for extra interpreter stack entries, if needed | |
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575 // method handles want to be able to push a few extra values (e.g., a bound receiver), and |
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576 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist, |
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577 // all without checking for a stack overflow |
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578 static int extra_stack_entries() { return (EnableMethodHandles ? (int)MethodHandlePushLimit : 0) + (EnableInvokeDynamic ? 3 : 0); } |
710 | 579 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize() |
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580 |
0 | 581 // RedefineClasses() support: |
582 bool is_old() const { return access_flags().is_old(); } | |
583 void set_is_old() { _access_flags.set_is_old(); } | |
584 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
585 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
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586 // see the definition in methodOop.cpp for the gory details |
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587 bool should_not_be_cached() const; |
0 | 588 |
589 // JVMTI Native method prefixing support: | |
590 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
591 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
592 | |
593 // Rewriting support | |
594 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
595 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
596 | |
597 // Get this method's jmethodID -- allocate if it doesn't exist | |
598 jmethodID jmethod_id() { methodHandle this_h(this); | |
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599 return instanceKlass::get_jmethod_id(method_holder(), this_h); } |
0 | 600 |
601 // Lookup the jmethodID for this method. Return NULL if not found. | |
602 // NOTE that this function can be called from a signal handler | |
603 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
604 // needs to be async-safe. No allocation should be done and | |
605 // so handles are not used to avoid deadlock. | |
606 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); } | |
607 | |
608 // JNI static invoke cached itable index accessors | |
609 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); } | |
610 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); } | |
611 | |
612 // Support for inlining of intrinsic methods | |
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613 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
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614 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
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615 |
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616 // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
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617 void init_intrinsic_id(); // updates from _none if a match |
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618 static vmSymbols::SID klass_id_for_intrinsics(klassOop holder); |
0 | 619 |
620 // On-stack replacement support | |
1783 | 621 bool has_osr_nmethod(int level, bool match_level) { |
622 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; | |
623 } | |
624 | |
625 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { | |
626 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci, level, match_level); | |
627 } | |
0 | 628 |
629 // Inline cache support | |
630 void cleanup_inline_caches(); | |
631 | |
632 // Find if klass for method is loaded | |
633 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
634 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
635 | |
636 // Indicates whether compilation failed earlier for this method, or | |
637 // whether it is not compilable for another reason like having a | |
638 // breakpoint set in it. | |
1783 | 639 bool is_not_compilable(int comp_level = CompLevel_any) const; |
640 void set_not_compilable(int comp_level = CompLevel_all, bool report = true); | |
641 void set_not_compilable_quietly(int comp_level = CompLevel_all) { | |
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642 set_not_compilable(comp_level, false); |
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643 } |
1783 | 644 bool is_not_osr_compilable(int comp_level = CompLevel_any) const { |
645 return is_not_compilable(comp_level) || access_flags().is_not_osr_compilable(); | |
646 } | |
647 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); } | |
648 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } | |
649 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } | |
650 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } | |
651 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } | |
0 | 652 |
653 // Background compilation support | |
1783 | 654 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
655 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
656 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
0 | 657 |
658 static methodOop method_from_bcp(address bcp); | |
659 | |
660 // Resolve all classes in signature, return 'true' if successful | |
661 static bool load_signature_classes(methodHandle m, TRAPS); | |
662 | |
663 // Return if true if not all classes references in signature, including return type, has been loaded | |
664 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
665 | |
666 // Printing | |
667 void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM | |
668 void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)" | |
669 | |
670 // Helper routine used for method sorting | |
671 static void sort_methods(objArrayOop methods, | |
672 objArrayOop methods_annotations, | |
673 objArrayOop methods_parameter_annotations, | |
674 objArrayOop methods_default_annotations, | |
675 bool idempotent = false); | |
676 | |
677 // size of parameters | |
678 void set_size_of_parameters(int size) { _size_of_parameters = size; } | |
679 private: | |
680 | |
681 // Inlined elements | |
682 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
683 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
684 | |
685 // Garbage collection support | |
686 oop* adr_constMethod() const { return (oop*)&_constMethod; } | |
687 oop* adr_constants() const { return (oop*)&_constants; } | |
688 oop* adr_method_data() const { return (oop*)&_method_data; } | |
689 }; | |
690 | |
691 | |
692 // Utility class for compressing line number tables | |
693 | |
694 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
695 private: | |
696 int _bci; | |
697 int _line; | |
698 public: | |
699 // Constructor | |
700 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
701 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
702 | |
703 // Write (bci, line number) pair to stream | |
704 void write_pair_regular(int bci_delta, int line_delta); | |
705 | |
706 inline void write_pair_inline(int bci, int line) { | |
707 int bci_delta = bci - _bci; | |
708 int line_delta = line - _line; | |
709 _bci = bci; | |
710 _line = line; | |
711 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
712 if (bci_delta == 0 && line_delta == 0) return; | |
713 // Check if bci is 5-bit and line number 3-bit unsigned. | |
714 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
715 // Compress into single byte. | |
716 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
717 // Check that value doesn't match escape character. | |
718 if (value != 0xFF) { | |
719 write_byte(value); | |
720 return; | |
721 } | |
722 } | |
723 write_pair_regular(bci_delta, line_delta); | |
724 } | |
725 | |
726 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
727 // Disabling optimization doesn't work for methods in header files | |
728 // so we force it to call through the non-optimized version in the .cpp. | |
729 // It's gross, but it's the only way we can ensure that all callers are | |
730 // fixed. MSC_VER is defined in build/windows/makefiles/compile.make. | |
731 #if defined(_M_AMD64) && MSC_VER >= 1400 | |
732 void write_pair(int bci, int line); | |
733 #else | |
734 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
735 #endif | |
736 | |
737 // Write end-of-stream marker | |
738 void write_terminator() { write_byte(0); } | |
739 }; | |
740 | |
741 | |
742 // Utility class for decompressing line number tables | |
743 | |
744 class CompressedLineNumberReadStream: public CompressedReadStream { | |
745 private: | |
746 int _bci; | |
747 int _line; | |
748 public: | |
749 // Constructor | |
750 CompressedLineNumberReadStream(u_char* buffer); | |
751 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
752 bool read_pair(); | |
753 // Accessing bci and line number (after calling read_pair) | |
754 int bci() const { return _bci; } | |
755 int line() const { return _line; } | |
756 }; | |
757 | |
758 | |
759 /// Fast Breakpoints. | |
760 | |
761 // If this structure gets more complicated (because bpts get numerous), | |
762 // move it into its own header. | |
763 | |
764 // There is presently no provision for concurrent access | |
765 // to breakpoint lists, which is only OK for JVMTI because | |
766 // breakpoints are written only at safepoints, and are read | |
767 // concurrently only outside of safepoints. | |
768 | |
769 class BreakpointInfo : public CHeapObj { | |
770 friend class VMStructs; | |
771 private: | |
772 Bytecodes::Code _orig_bytecode; | |
773 int _bci; | |
774 u2 _name_index; // of method | |
775 u2 _signature_index; // of method | |
776 BreakpointInfo* _next; // simple storage allocation | |
777 | |
778 public: | |
779 BreakpointInfo(methodOop m, int bci); | |
780 | |
781 // accessors | |
782 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
783 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
784 int bci() { return _bci; } | |
785 | |
786 BreakpointInfo* next() const { return _next; } | |
787 void set_next(BreakpointInfo* n) { _next = n; } | |
788 | |
789 // helps for searchers | |
790 bool match(methodOop m, int bci) { | |
791 return bci == _bci && match(m); | |
792 } | |
793 | |
794 bool match(methodOop m) { | |
795 return _name_index == m->name_index() && | |
796 _signature_index == m->signature_index(); | |
797 } | |
798 | |
799 void set(methodOop method); | |
800 void clear(methodOop method); | |
801 }; | |
1972 | 802 |
803 #endif // SHARE_VM_OOPS_METHODOOP_HPP |