Mercurial > hg > truffle
annotate src/share/vm/oops/methodOop.hpp @ 657:715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
Reviewed-by: xlu, mchung
author | acorn |
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date | Wed, 25 Mar 2009 13:09:28 -0400 |
parents | 7bb995fbd3c0 |
children | e5b0439ef4ae |
rev | line source |
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0 | 1 /* |
579 | 2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // A methodOop represents a Java method. | |
26 // | |
27 // Memory layout (each line represents a word). Note that most applications load thousands of methods, | |
28 // so keeping the size of this structure small has a big impact on footprint. | |
29 // | |
30 // We put all oops and method_size first for better gc cache locality. | |
31 // | |
32 // The actual bytecodes are inlined after the end of the methodOopDesc struct. | |
33 // | |
34 // There are bits in the access_flags telling whether inlined tables are present. | |
35 // Note that accessing the line number and local variable tables is not performance critical at all. | |
36 // Accessing the checked exceptions table is used by reflection, so we put that last to make access | |
37 // to it fast. | |
38 // | |
39 // The line number table is compressed and inlined following the byte codes. It is found as the first | |
40 // byte following the byte codes. The checked exceptions table and the local variable table are inlined | |
41 // after the line number table, and indexed from the end of the method. We do not compress the checked | |
42 // exceptions table since the average length is less than 2, and do not bother to compress the local | |
43 // variable table either since it is mostly absent. | |
44 // | |
45 // Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter) | |
46 // | |
47 // |------------------------------------------------------| | |
48 // | header | | |
49 // | klass | | |
50 // |------------------------------------------------------| | |
51 // | constMethodOop (oop) | | |
52 // | constants (oop) | | |
53 // |------------------------------------------------------| | |
54 // | methodData (oop) | | |
55 // | interp_invocation_count | | |
56 // |------------------------------------------------------| | |
57 // | access_flags | | |
58 // | vtable_index | | |
59 // |------------------------------------------------------| | |
60 // | result_index (C++ interpreter only) | | |
61 // |------------------------------------------------------| | |
62 // | method_size | max_stack | | |
63 // | max_locals | size_of_parameters | | |
64 // |------------------------------------------------------| | |
65 // | intrinsic_id, highest_tier | (unused) | | |
66 // |------------------------------------------------------| | |
67 // | throwout_count | num_breakpoints | | |
68 // |------------------------------------------------------| | |
69 // | invocation_counter | | |
70 // | backedge_counter | | |
71 // |------------------------------------------------------| | |
72 // | code (pointer) | | |
73 // | i2i (pointer) | | |
74 // | adapter (pointer) | | |
75 // | from_compiled_entry (pointer) | | |
76 // | from_interpreted_entry (pointer) | | |
77 // |------------------------------------------------------| | |
78 // | native_function (present only if native) | | |
79 // | signature_handler (present only if native) | | |
80 // |------------------------------------------------------| | |
81 | |
82 | |
83 class CheckedExceptionElement; | |
84 class LocalVariableTableElement; | |
85 class AdapterHandlerEntry; | |
86 | |
87 class methodDataOopDesc; | |
88 | |
89 class methodOopDesc : public oopDesc { | |
90 friend class methodKlass; | |
91 friend class VMStructs; | |
92 private: | |
93 constMethodOop _constMethod; // Method read-only data. | |
94 constantPoolOop _constants; // Constant pool | |
95 methodDataOop _method_data; | |
96 int _interpreter_invocation_count; // Count of times invoked | |
97 AccessFlags _access_flags; // Access flags | |
98 int _vtable_index; // vtable index of this method (see VtableIndexFlag) | |
99 // note: can have vtables with >2**16 elements (because of inheritance) | |
100 #ifdef CC_INTERP | |
101 int _result_index; // C++ interpreter needs for converting results to/from stack | |
102 #endif | |
103 u2 _method_size; // size of this object | |
104 u2 _max_stack; // Maximum number of entries on the expression stack | |
105 u2 _max_locals; // Number of local variables used by this method | |
106 u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words | |
107 u1 _intrinsic_id_cache; // Cache for intrinsic_id; 0 or 1+vmInt::ID | |
108 u1 _highest_tier_compile; // Highest compile level this method has ever seen. | |
109 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting | |
110 u2 _number_of_breakpoints; // fullspeed debugging support | |
111 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations | |
112 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations | |
113 #ifndef PRODUCT | |
114 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) | |
115 #endif | |
116 // Entry point for calling both from and to the interpreter. | |
117 address _i2i_entry; // All-args-on-stack calling convention | |
118 // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked. | |
119 AdapterHandlerEntry* _adapter; | |
120 // Entry point for calling from compiled code, to compiled code if it exists | |
121 // or else the interpreter. | |
122 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() | |
123 // The entry point for calling both from and to compiled code is | |
124 // "_code->entry_point()". Because of tiered compilation and de-opt, this | |
125 // field can come and go. It can transition from NULL to not-null at any | |
126 // time (whenever a compile completes). It can transition from not-null to | |
127 // NULL only at safepoints (because of a de-opt). | |
128 nmethod* volatile _code; // Points to the corresponding piece of native code | |
129 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry | |
130 | |
131 public: | |
518
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132 |
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133 static const bool IsUnsafeConc = false; |
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134 static const bool IsSafeConc = true; |
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135 |
0 | 136 // accessors for instance variables |
137 constMethodOop constMethod() const { return _constMethod; } | |
138 void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); } | |
139 | |
140 | |
141 static address make_adapters(methodHandle mh, TRAPS); | |
142 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
143 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
144 | |
145 // access flag | |
146 AccessFlags access_flags() const { return _access_flags; } | |
147 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
148 | |
149 // name | |
150 symbolOop name() const { return _constants->symbol_at(name_index()); } | |
151 int name_index() const { return constMethod()->name_index(); } | |
152 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
153 | |
154 // signature | |
155 symbolOop signature() const { return _constants->symbol_at(signature_index()); } | |
156 int signature_index() const { return constMethod()->signature_index(); } | |
157 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
158 | |
159 // generics support | |
160 symbolOop generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (symbolOop)NULL); } | |
161 int generic_signature_index() const { return constMethod()->generic_signature_index(); } | |
162 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
163 | |
164 // annotations support | |
165 typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); } | |
166 typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); } | |
167 typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); } | |
168 | |
169 #ifdef CC_INTERP | |
170 void set_result_index(BasicType type); | |
171 int result_index() { return _result_index; } | |
172 #endif | |
173 | |
174 // Helper routine: get klass name + "." + method name + signature as | |
175 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
176 // and fatal error handling. The string is allocated in resource | |
177 // area if a buffer is not provided by the caller. | |
178 char* name_and_sig_as_C_string(); | |
179 char* name_and_sig_as_C_string(char* buf, int size); | |
180 | |
181 // Static routine in the situations we don't have a methodOop | |
182 static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature); | |
183 static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature, char* buf, int size); | |
184 | |
185 // JVMTI breakpoints | |
186 Bytecodes::Code orig_bytecode_at(int bci); | |
187 void set_orig_bytecode_at(int bci, Bytecodes::Code code); | |
188 void set_breakpoint(int bci); | |
189 void clear_breakpoint(int bci); | |
190 void clear_all_breakpoints(); | |
191 // Tracking number of breakpoints, for fullspeed debugging. | |
192 // Only mutated by VM thread. | |
193 u2 number_of_breakpoints() const { return _number_of_breakpoints; } | |
194 void incr_number_of_breakpoints() { ++_number_of_breakpoints; } | |
195 void decr_number_of_breakpoints() { --_number_of_breakpoints; } | |
196 // Initialization only | |
197 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; } | |
198 | |
199 // index into instanceKlass methods() array | |
200 u2 method_idnum() const { return constMethod()->method_idnum(); } | |
201 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
202 | |
203 // code size | |
204 int code_size() const { return constMethod()->code_size(); } | |
205 | |
206 // method size | |
207 int method_size() const { return _method_size; } | |
208 void set_method_size(int size) { | |
209 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
210 _method_size = size; | |
211 } | |
212 | |
213 // constant pool for klassOop holding this method | |
214 constantPoolOop constants() const { return _constants; } | |
215 void set_constants(constantPoolOop c) { oop_store_without_check((oop*)&_constants, c); } | |
216 | |
217 // max stack | |
218 int max_stack() const { return _max_stack; } | |
219 void set_max_stack(int size) { _max_stack = size; } | |
220 | |
221 // max locals | |
222 int max_locals() const { return _max_locals; } | |
223 void set_max_locals(int size) { _max_locals = size; } | |
224 int highest_tier_compile() { return _highest_tier_compile;} | |
225 void set_highest_tier_compile(int level) { _highest_tier_compile = level;} | |
226 | |
227 void clear_intrinsic_id_cache() { _intrinsic_id_cache = 0; } | |
228 | |
229 // Count of times method was exited via exception while interpreting | |
230 void interpreter_throwout_increment() { | |
231 if (_interpreter_throwout_count < 65534) { | |
232 _interpreter_throwout_count++; | |
233 } | |
234 } | |
235 | |
236 int interpreter_throwout_count() const { return _interpreter_throwout_count; } | |
237 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; } | |
238 | |
239 // size of parameters | |
240 int size_of_parameters() const { return _size_of_parameters; } | |
241 | |
242 bool has_stackmap_table() const { | |
243 return constMethod()->has_stackmap_table(); | |
244 } | |
245 | |
246 typeArrayOop stackmap_data() const { | |
247 return constMethod()->stackmap_data(); | |
248 } | |
249 | |
250 // exception handler table | |
251 typeArrayOop exception_table() const | |
252 { return constMethod()->exception_table(); } | |
253 void set_exception_table(typeArrayOop e) | |
254 { constMethod()->set_exception_table(e); } | |
255 bool has_exception_handler() const | |
256 { return constMethod()->has_exception_handler(); } | |
257 | |
258 // Finds the first entry point bci of an exception handler for an | |
259 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
260 // for ex_klass indicates that the exception klass is not known; in | |
261 // this case it matches any constraint class. Returns -1 if the | |
262 // exception cannot be handled in this method. The handler | |
263 // constraint classes are loaded if necessary. Note that this may | |
264 // throw an exception if loading of the constraint classes causes | |
265 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
266 // If an exception is thrown, returns the bci of the | |
267 // exception handler which caused the exception to be thrown, which | |
268 // is needed for proper retries. See, for example, | |
269 // InterpreterRuntime::exception_handler_for_exception. | |
270 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS); | |
271 | |
272 // method data access | |
273 methodDataOop method_data() const { | |
274 return _method_data; | |
275 } | |
276 void set_method_data(methodDataOop data) { | |
277 oop_store_without_check((oop*)&_method_data, (oop)data); | |
278 } | |
279 | |
280 // invocation counter | |
281 InvocationCounter* invocation_counter() { return &_invocation_counter; } | |
282 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
283 int invocation_count() const { return _invocation_counter.count(); } | |
284 int backedge_count() const { return _backedge_counter.count(); } | |
285 bool was_executed_more_than(int n) const; | |
286 bool was_never_executed() const { return !was_executed_more_than(0); } | |
287 | |
288 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
289 | |
290 int interpreter_invocation_count() const { return _interpreter_invocation_count; } | |
291 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; } | |
292 int increment_interpreter_invocation_count() { return ++_interpreter_invocation_count; } | |
293 | |
294 #ifndef PRODUCT | |
295 int compiled_invocation_count() const { return _compiled_invocation_count; } | |
296 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } | |
297 #endif // not PRODUCT | |
298 | |
605 | 299 // Clear (non-shared space) pointers which could not be relevant |
0 | 300 // if this (shared) method were mapped into another JVM. |
301 void remove_unshareable_info(); | |
302 | |
303 // nmethod/verified compiler entry | |
304 address verified_code_entry(); | |
305 bool check_code() const; // Not inline to avoid circular ref | |
306 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
307 void clear_code(); // Clear out any compiled code | |
308 void set_code(methodHandle mh, nmethod* code); | |
309 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } | |
310 address get_i2c_entry(); | |
311 address get_c2i_entry(); | |
312 address get_c2i_unverified_entry(); | |
313 AdapterHandlerEntry* adapter() { return _adapter; } | |
314 // setup entry points | |
315 void link_method(methodHandle method, TRAPS); | |
316 // clear entry points. Used by sharing code | |
317 void unlink_method(); | |
318 | |
319 // vtable index | |
320 enum VtableIndexFlag { | |
321 // Valid vtable indexes are non-negative (>= 0). | |
322 // These few negative values are used as sentinels. | |
323 invalid_vtable_index = -4, // distinct from any valid vtable index | |
324 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
325 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
326 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
327 }; | |
328 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
329 int vtable_index() const { assert(valid_vtable_index(), ""); | |
330 return _vtable_index; } | |
331 void set_vtable_index(int index) { _vtable_index = index; } | |
332 | |
333 // interpreter entry | |
334 address interpreter_entry() const { return _i2i_entry; } | |
335 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
336 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
337 int interpreter_kind(void) { | |
338 return constMethod()->interpreter_kind(); | |
339 } | |
340 void set_interpreter_kind(); | |
341 void set_interpreter_kind(int kind) { | |
342 constMethod()->set_interpreter_kind(kind); | |
343 } | |
344 | |
345 // native function (used for native methods only) | |
346 enum { | |
347 native_bind_event_is_interesting = true | |
348 }; | |
349 address native_function() const { return *(native_function_addr()); } | |
350 // Must specify a real function (not NULL). | |
351 // Use clear_native_function() to unregister. | |
352 void set_native_function(address function, bool post_event_flag); | |
353 bool has_native_function() const; | |
354 void clear_native_function(); | |
355 | |
356 // signature handler (used for native methods only) | |
357 address signature_handler() const { return *(signature_handler_addr()); } | |
358 void set_signature_handler(address handler); | |
359 | |
360 // Interpreter oopmap support | |
361 void mask_for(int bci, InterpreterOopMap* mask); | |
362 | |
363 #ifndef PRODUCT | |
364 // operations on invocation counter | |
365 void print_invocation_count() const; | |
366 #endif | |
367 | |
368 // byte codes | |
369 address code_base() const { return constMethod()->code_base(); } | |
370 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
371 | |
372 // prints byte codes | |
373 void print_codes() const { print_codes_on(tty); } | |
374 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
375 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
376 | |
377 // checked exceptions | |
378 int checked_exceptions_length() const | |
379 { return constMethod()->checked_exceptions_length(); } | |
380 CheckedExceptionElement* checked_exceptions_start() const | |
381 { return constMethod()->checked_exceptions_start(); } | |
382 | |
383 // localvariable table | |
384 bool has_localvariable_table() const | |
385 { return constMethod()->has_localvariable_table(); } | |
386 int localvariable_table_length() const | |
387 { return constMethod()->localvariable_table_length(); } | |
388 LocalVariableTableElement* localvariable_table_start() const | |
389 { return constMethod()->localvariable_table_start(); } | |
390 | |
391 bool has_linenumber_table() const | |
392 { return constMethod()->has_linenumber_table(); } | |
393 u_char* compressed_linenumber_table() const | |
394 { return constMethod()->compressed_linenumber_table(); } | |
395 | |
396 // method holder (the klassOop holding this method) | |
397 klassOop method_holder() const { return _constants->pool_holder(); } | |
398 | |
399 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
400 symbolOop klass_name() const; // returns the name of the method holder | |
401 BasicType result_type() const; // type of the method result | |
402 int result_type_index() const; // type index of the method result | |
403 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
404 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
405 | |
406 // Checked exceptions thrown by this method (resolved to mirrors) | |
407 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
408 | |
409 // Access flags | |
410 bool is_public() const { return access_flags().is_public(); } | |
411 bool is_private() const { return access_flags().is_private(); } | |
412 bool is_protected() const { return access_flags().is_protected(); } | |
413 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
414 bool is_static() const { return access_flags().is_static(); } | |
415 bool is_final() const { return access_flags().is_final(); } | |
416 bool is_synchronized() const { return access_flags().is_synchronized();} | |
417 bool is_native() const { return access_flags().is_native(); } | |
418 bool is_abstract() const { return access_flags().is_abstract(); } | |
419 bool is_strict() const { return access_flags().is_strict(); } | |
420 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
421 | |
422 // returns true if contains only return operation | |
423 bool is_empty_method() const; | |
424 | |
425 // returns true if this is a vanilla constructor | |
426 bool is_vanilla_constructor() const; | |
427 | |
428 // checks method and its method holder | |
429 bool is_final_method() const; | |
430 bool is_strict_method() const; | |
431 | |
432 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
433 bool can_be_statically_bound() const; | |
434 | |
435 // returns true if the method has any backward branches. | |
436 bool has_loops() { | |
437 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
438 }; | |
439 | |
440 bool compute_has_loops_flag(); | |
441 | |
442 bool has_jsrs() { | |
443 return access_flags().has_jsrs(); | |
444 }; | |
445 void set_has_jsrs() { | |
446 _access_flags.set_has_jsrs(); | |
447 } | |
448 | |
449 // returns true if the method has any monitors. | |
450 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
451 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
452 | |
453 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
454 | |
455 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
456 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
457 // has not been computed yet. | |
458 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
459 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
460 | |
461 // returns true if the method is an accessor function (setter/getter). | |
462 bool is_accessor() const; | |
463 | |
464 // returns true if the method is an initializer (<init> or <clinit>). | |
465 bool is_initializer() const; | |
466 | |
467 // compiled code support | |
468 // NOTE: code() is inherently racy as deopt can be clearing code | |
469 // simultaneously. Use with caution. | |
470 bool has_compiled_code() const { return code() != NULL; } | |
471 | |
472 // sizing | |
473 static int object_size(bool is_native); | |
474 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; } | |
475 int object_size() const { return method_size(); } | |
476 | |
477 bool object_is_parsable() const { return method_size() > 0; } | |
478 | |
479 // interpreter support | |
480 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); } | |
481 static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); } | |
482 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); } | |
483 #ifdef CC_INTERP | |
484 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); } | |
485 #endif /* CC_INTERP */ | |
486 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); } | |
487 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); } | |
488 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); } | |
489 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); } | |
490 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); } | |
491 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); } | |
492 static ByteSize method_data_offset() { | |
493 return byte_offset_of(methodOopDesc, _method_data); | |
494 } | |
495 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); } | |
496 #ifndef PRODUCT | |
497 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); } | |
498 #endif // not PRODUCT | |
499 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); } | |
500 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); } | |
501 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); } | |
502 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); } | |
503 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); } | |
504 | |
505 // for code generation | |
506 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); } | |
507 static int interpreter_invocation_counter_offset_in_bytes() | |
508 { return offset_of(methodOopDesc, _interpreter_invocation_count); } | |
509 | |
510 // Static methods that are used to implement member methods where an exposed this pointer | |
511 // is needed due to possible GCs | |
512 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS); | |
513 | |
514 // Returns the byte code index from the byte code pointer | |
515 int bci_from(address bcp) const; | |
516 address bcp_from(int bci) const; | |
517 int validate_bci_from_bcx(intptr_t bcx) const; | |
518 | |
519 // Returns the line number for a bci if debugging information for the method is prowided, | |
520 // -1 is returned otherwise. | |
521 int line_number_from_bci(int bci) const; | |
522 | |
523 // Reflection support | |
524 bool is_overridden_in(klassOop k) const; | |
525 | |
526 // RedefineClasses() support: | |
527 bool is_old() const { return access_flags().is_old(); } | |
528 void set_is_old() { _access_flags.set_is_old(); } | |
529 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
530 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
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531 // see the definition in methodOop.cpp for the gory details |
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532 bool should_not_be_cached() const; |
0 | 533 |
534 // JVMTI Native method prefixing support: | |
535 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
536 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
537 | |
538 // Rewriting support | |
539 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
540 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
541 | |
542 // Get this method's jmethodID -- allocate if it doesn't exist | |
543 jmethodID jmethod_id() { methodHandle this_h(this); | |
544 return instanceKlass::jmethod_id_for_impl(method_holder(), this_h); } | |
545 | |
546 // Lookup the jmethodID for this method. Return NULL if not found. | |
547 // NOTE that this function can be called from a signal handler | |
548 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
549 // needs to be async-safe. No allocation should be done and | |
550 // so handles are not used to avoid deadlock. | |
551 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); } | |
552 | |
553 // JNI static invoke cached itable index accessors | |
554 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); } | |
555 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); } | |
556 | |
557 // Support for inlining of intrinsic methods | |
558 vmIntrinsics::ID intrinsic_id() const { // returns zero if not an intrinsic | |
559 const u1& cache = _intrinsic_id_cache; | |
560 if (cache != 0) { | |
561 return (vmIntrinsics::ID)(cache - 1); | |
562 } else { | |
563 vmIntrinsics::ID id = compute_intrinsic_id(); | |
564 *(u1*)&cache = ((u1) id) + 1; // force the cache to be non-const | |
565 vmIntrinsics::verify_method(id, (methodOop) this); | |
566 assert((vmIntrinsics::ID)(cache - 1) == id, "proper conversion"); | |
567 return id; | |
568 } | |
569 } | |
570 | |
571 // On-stack replacement support | |
572 bool has_osr_nmethod() { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci) != NULL; } | |
573 nmethod* lookup_osr_nmethod_for(int bci) { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci); } | |
574 | |
575 // Inline cache support | |
576 void cleanup_inline_caches(); | |
577 | |
578 // Find if klass for method is loaded | |
579 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
580 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
581 | |
582 // Indicates whether compilation failed earlier for this method, or | |
583 // whether it is not compilable for another reason like having a | |
584 // breakpoint set in it. | |
585 bool is_not_compilable(int comp_level = CompLevel_highest_tier) const; | |
586 void set_not_compilable(int comp_level = CompLevel_highest_tier); | |
587 | |
588 bool is_not_osr_compilable() const { return is_not_compilable() || access_flags().is_not_osr_compilable(); } | |
589 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); } | |
590 | |
591 bool is_not_tier1_compilable() const { return access_flags().is_not_tier1_compilable(); } | |
592 void set_not_tier1_compilable() { _access_flags.set_not_tier1_compilable(); } | |
593 | |
594 // Background compilation support | |
595 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } | |
596 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
597 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
598 | |
599 static methodOop method_from_bcp(address bcp); | |
600 | |
601 // Resolve all classes in signature, return 'true' if successful | |
602 static bool load_signature_classes(methodHandle m, TRAPS); | |
603 | |
604 // Return if true if not all classes references in signature, including return type, has been loaded | |
605 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
606 | |
607 // Printing | |
608 void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM | |
609 void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)" | |
610 | |
611 // Helper routine used for method sorting | |
612 static void sort_methods(objArrayOop methods, | |
613 objArrayOop methods_annotations, | |
614 objArrayOop methods_parameter_annotations, | |
615 objArrayOop methods_default_annotations, | |
616 bool idempotent = false); | |
617 | |
618 // size of parameters | |
619 void set_size_of_parameters(int size) { _size_of_parameters = size; } | |
620 private: | |
621 | |
622 // Helper routine for intrinsic_id(). | |
623 vmIntrinsics::ID compute_intrinsic_id() const; | |
624 | |
625 // Inlined elements | |
626 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
627 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
628 | |
629 // Garbage collection support | |
630 oop* adr_constMethod() const { return (oop*)&_constMethod; } | |
631 oop* adr_constants() const { return (oop*)&_constants; } | |
632 oop* adr_method_data() const { return (oop*)&_method_data; } | |
633 }; | |
634 | |
635 | |
636 // Utility class for compressing line number tables | |
637 | |
638 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
639 private: | |
640 int _bci; | |
641 int _line; | |
642 public: | |
643 // Constructor | |
644 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
645 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
646 | |
647 // Write (bci, line number) pair to stream | |
648 void write_pair_regular(int bci_delta, int line_delta); | |
649 | |
650 inline void write_pair_inline(int bci, int line) { | |
651 int bci_delta = bci - _bci; | |
652 int line_delta = line - _line; | |
653 _bci = bci; | |
654 _line = line; | |
655 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
656 if (bci_delta == 0 && line_delta == 0) return; | |
657 // Check if bci is 5-bit and line number 3-bit unsigned. | |
658 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
659 // Compress into single byte. | |
660 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
661 // Check that value doesn't match escape character. | |
662 if (value != 0xFF) { | |
663 write_byte(value); | |
664 return; | |
665 } | |
666 } | |
667 write_pair_regular(bci_delta, line_delta); | |
668 } | |
669 | |
670 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
671 // Disabling optimization doesn't work for methods in header files | |
672 // so we force it to call through the non-optimized version in the .cpp. | |
673 // It's gross, but it's the only way we can ensure that all callers are | |
674 // fixed. MSC_VER is defined in build/windows/makefiles/compile.make. | |
675 #if defined(_M_AMD64) && MSC_VER >= 1400 | |
676 void write_pair(int bci, int line); | |
677 #else | |
678 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
679 #endif | |
680 | |
681 // Write end-of-stream marker | |
682 void write_terminator() { write_byte(0); } | |
683 }; | |
684 | |
685 | |
686 // Utility class for decompressing line number tables | |
687 | |
688 class CompressedLineNumberReadStream: public CompressedReadStream { | |
689 private: | |
690 int _bci; | |
691 int _line; | |
692 public: | |
693 // Constructor | |
694 CompressedLineNumberReadStream(u_char* buffer); | |
695 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
696 bool read_pair(); | |
697 // Accessing bci and line number (after calling read_pair) | |
698 int bci() const { return _bci; } | |
699 int line() const { return _line; } | |
700 }; | |
701 | |
702 | |
703 /// Fast Breakpoints. | |
704 | |
705 // If this structure gets more complicated (because bpts get numerous), | |
706 // move it into its own header. | |
707 | |
708 // There is presently no provision for concurrent access | |
709 // to breakpoint lists, which is only OK for JVMTI because | |
710 // breakpoints are written only at safepoints, and are read | |
711 // concurrently only outside of safepoints. | |
712 | |
713 class BreakpointInfo : public CHeapObj { | |
714 friend class VMStructs; | |
715 private: | |
716 Bytecodes::Code _orig_bytecode; | |
717 int _bci; | |
718 u2 _name_index; // of method | |
719 u2 _signature_index; // of method | |
720 BreakpointInfo* _next; // simple storage allocation | |
721 | |
722 public: | |
723 BreakpointInfo(methodOop m, int bci); | |
724 | |
725 // accessors | |
726 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
727 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
728 int bci() { return _bci; } | |
729 | |
730 BreakpointInfo* next() const { return _next; } | |
731 void set_next(BreakpointInfo* n) { _next = n; } | |
732 | |
733 // helps for searchers | |
734 bool match(methodOop m, int bci) { | |
735 return bci == _bci && match(m); | |
736 } | |
737 | |
738 bool match(methodOop m) { | |
739 return _name_index == m->name_index() && | |
740 _signature_index == m->signature_index(); | |
741 } | |
742 | |
743 void set(methodOop method); | |
744 void clear(methodOop method); | |
745 }; |