Thu, 12 Jul 2012 00:39:53 -0700
6711908: JVM needs direct access to some annotations
Summary: Add annotation extraction code to class file parser.
Reviewed-by: twisti, jrose, kvn
Contributed-by: michael.haupt@oracle.com
1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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23 */
25 #ifndef SHARE_VM_OOPS_METHODOOP_HPP
26 #define SHARE_VM_OOPS_METHODOOP_HPP
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"
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 // |------------------------------------------------------|
68 // | methodData (oop) |
69 // | interp_invocation_count |
70 // |------------------------------------------------------|
71 // | access_flags |
72 // | vtable_index |
73 // |------------------------------------------------------|
74 // | result_index (C++ interpreter only) |
75 // |------------------------------------------------------|
76 // | method_size | max_stack |
77 // | max_locals | size_of_parameters |
78 // |------------------------------------------------------|
79 // |intrinsic_id| flags | throwout_count |
80 // |------------------------------------------------------|
81 // | num_breakpoints | (unused) |
82 // |------------------------------------------------------|
83 // | invocation_counter |
84 // | backedge_counter |
85 // |------------------------------------------------------|
86 // | prev_time (tiered only, 64 bit wide) |
87 // | |
88 // |------------------------------------------------------|
89 // | rate (tiered) |
90 // |------------------------------------------------------|
91 // | code (pointer) |
92 // | i2i (pointer) |
93 // | adapter (pointer) |
94 // | from_compiled_entry (pointer) |
95 // | from_interpreted_entry (pointer) |
96 // |------------------------------------------------------|
97 // | native_function (present only if native) |
98 // | signature_handler (present only if native) |
99 // |------------------------------------------------------|
102 class CheckedExceptionElement;
103 class LocalVariableTableElement;
104 class AdapterHandlerEntry;
105 class methodDataOopDesc;
107 class methodOopDesc : public oopDesc {
108 friend class methodKlass;
109 friend class VMStructs;
110 private:
111 constMethodOop _constMethod; // Method read-only data.
112 methodDataOop _method_data;
113 int _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered)
114 AccessFlags _access_flags; // Access flags
115 int _vtable_index; // vtable index of this method (see VtableIndexFlag)
116 // note: can have vtables with >2**16 elements (because of inheritance)
117 #ifdef CC_INTERP
118 int _result_index; // C++ interpreter needs for converting results to/from stack
119 #endif
120 u2 _method_size; // size of this object
121 u2 _max_stack; // Maximum number of entries on the expression stack
122 u2 _max_locals; // Number of local variables used by this method
123 u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words
124 u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none)
125 u1 _jfr_towrite : 1, // Flags
126 _force_inline : 1,
127 : 6;
128 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
129 u2 _number_of_breakpoints; // fullspeed debugging support
130 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations
131 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations
133 #ifdef TIERED
134 jlong _prev_time; // Previous time the rate was acquired
135 float _rate; // Events (invocation and backedge counter increments) per millisecond
136 #endif
138 #ifndef PRODUCT
139 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging)
140 #endif
141 // Entry point for calling both from and to the interpreter.
142 address _i2i_entry; // All-args-on-stack calling convention
143 // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked.
144 AdapterHandlerEntry* _adapter;
145 // Entry point for calling from compiled code, to compiled code if it exists
146 // or else the interpreter.
147 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry()
148 // The entry point for calling both from and to compiled code is
149 // "_code->entry_point()". Because of tiered compilation and de-opt, this
150 // field can come and go. It can transition from NULL to not-null at any
151 // time (whenever a compile completes). It can transition from not-null to
152 // NULL only at safepoints (because of a de-opt).
153 nmethod* volatile _code; // Points to the corresponding piece of native code
154 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry
156 public:
158 // accessors for instance variables
159 constMethodOop constMethod() const { return _constMethod; }
160 void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); }
163 static address make_adapters(methodHandle mh, TRAPS);
164 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); }
165 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); }
167 // access flag
168 AccessFlags access_flags() const { return _access_flags; }
169 void set_access_flags(AccessFlags flags) { _access_flags = flags; }
171 // name
172 Symbol* name() const { return constants()->symbol_at(name_index()); }
173 int name_index() const { return constMethod()->name_index(); }
174 void set_name_index(int index) { constMethod()->set_name_index(index); }
176 // signature
177 Symbol* signature() const { return constants()->symbol_at(signature_index()); }
178 int signature_index() const { return constMethod()->signature_index(); }
179 void set_signature_index(int index) { constMethod()->set_signature_index(index); }
181 // generics support
182 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)NULL); }
183 int generic_signature_index() const { return constMethod()->generic_signature_index(); }
184 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); }
186 // annotations support
187 typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); }
188 typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); }
189 typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); }
191 #ifdef CC_INTERP
192 void set_result_index(BasicType type);
193 int result_index() { return _result_index; }
194 #endif
196 // Helper routine: get klass name + "." + method name + signature as
197 // C string, for the purpose of providing more useful NoSuchMethodErrors
198 // and fatal error handling. The string is allocated in resource
199 // area if a buffer is not provided by the caller.
200 char* name_and_sig_as_C_string() const;
201 char* name_and_sig_as_C_string(char* buf, int size) const;
203 // Static routine in the situations we don't have a methodOop
204 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature);
205 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size);
207 Bytecodes::Code java_code_at(int bci) const {
208 return Bytecodes::java_code_at(this, bcp_from(bci));
209 }
210 Bytecodes::Code code_at(int bci) const {
211 return Bytecodes::code_at(this, bcp_from(bci));
212 }
214 // JVMTI breakpoints
215 Bytecodes::Code orig_bytecode_at(int bci) const;
216 void set_orig_bytecode_at(int bci, Bytecodes::Code code);
217 void set_breakpoint(int bci);
218 void clear_breakpoint(int bci);
219 void clear_all_breakpoints();
220 // Tracking number of breakpoints, for fullspeed debugging.
221 // Only mutated by VM thread.
222 u2 number_of_breakpoints() const { return _number_of_breakpoints; }
223 void incr_number_of_breakpoints() { ++_number_of_breakpoints; }
224 void decr_number_of_breakpoints() { --_number_of_breakpoints; }
225 // Initialization only
226 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; }
228 // index into instanceKlass methods() array
229 // note: also used by jfr
230 u2 method_idnum() const { return constMethod()->method_idnum(); }
231 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); }
233 // code size
234 int code_size() const { return constMethod()->code_size(); }
236 // method size
237 int method_size() const { return _method_size; }
238 void set_method_size(int size) {
239 assert(0 <= size && size < (1 << 16), "invalid method size");
240 _method_size = size;
241 }
243 // constant pool for klassOop holding this method
244 constantPoolOop constants() const { return constMethod()->constants(); }
245 void set_constants(constantPoolOop c) { constMethod()->set_constants(c); }
247 // max stack
248 int max_stack() const { return _max_stack; }
249 void set_max_stack(int size) { _max_stack = size; }
251 // max locals
252 int max_locals() const { return _max_locals; }
253 void set_max_locals(int size) { _max_locals = size; }
255 int highest_comp_level() const;
256 void set_highest_comp_level(int level);
257 int highest_osr_comp_level() const;
258 void set_highest_osr_comp_level(int level);
260 // Count of times method was exited via exception while interpreting
261 void interpreter_throwout_increment() {
262 if (_interpreter_throwout_count < 65534) {
263 _interpreter_throwout_count++;
264 }
265 }
267 int interpreter_throwout_count() const { return _interpreter_throwout_count; }
268 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; }
270 // size of parameters
271 int size_of_parameters() const { return _size_of_parameters; }
273 bool has_stackmap_table() const {
274 return constMethod()->has_stackmap_table();
275 }
277 typeArrayOop stackmap_data() const {
278 return constMethod()->stackmap_data();
279 }
281 void set_stackmap_data(typeArrayOop sd) {
282 constMethod()->set_stackmap_data(sd);
283 }
285 // exception handler table
286 typeArrayOop exception_table() const
287 { return constMethod()->exception_table(); }
288 void set_exception_table(typeArrayOop e)
289 { constMethod()->set_exception_table(e); }
290 bool has_exception_handler() const
291 { return constMethod()->has_exception_handler(); }
293 // Finds the first entry point bci of an exception handler for an
294 // exception of klass ex_klass thrown at throw_bci. A value of NULL
295 // for ex_klass indicates that the exception klass is not known; in
296 // this case it matches any constraint class. Returns -1 if the
297 // exception cannot be handled in this method. The handler
298 // constraint classes are loaded if necessary. Note that this may
299 // throw an exception if loading of the constraint classes causes
300 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError.
301 // If an exception is thrown, returns the bci of the
302 // exception handler which caused the exception to be thrown, which
303 // is needed for proper retries. See, for example,
304 // InterpreterRuntime::exception_handler_for_exception.
305 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS);
307 // method data access
308 methodDataOop method_data() const {
309 return _method_data;
310 }
311 void set_method_data(methodDataOop data) {
312 oop_store_without_check((oop*)&_method_data, (oop)data);
313 }
315 // invocation counter
316 InvocationCounter* invocation_counter() { return &_invocation_counter; }
317 InvocationCounter* backedge_counter() { return &_backedge_counter; }
319 #ifdef TIERED
320 // We are reusing interpreter_invocation_count as a holder for the previous event count!
321 // We can do that since interpreter_invocation_count is not used in tiered.
322 int prev_event_count() const { return _interpreter_invocation_count; }
323 void set_prev_event_count(int count) { _interpreter_invocation_count = count; }
324 jlong prev_time() const { return _prev_time; }
325 void set_prev_time(jlong time) { _prev_time = time; }
326 float rate() const { return _rate; }
327 void set_rate(float rate) { _rate = rate; }
328 #endif
330 int invocation_count();
331 int backedge_count();
333 bool was_executed_more_than(int n);
334 bool was_never_executed() { return !was_executed_more_than(0); }
336 static void build_interpreter_method_data(methodHandle method, TRAPS);
338 int interpreter_invocation_count() {
339 if (TieredCompilation) return invocation_count();
340 else return _interpreter_invocation_count;
341 }
342 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; }
343 int increment_interpreter_invocation_count() {
344 if (TieredCompilation) ShouldNotReachHere();
345 return ++_interpreter_invocation_count;
346 }
348 #ifndef PRODUCT
349 int compiled_invocation_count() const { return _compiled_invocation_count; }
350 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; }
351 #endif // not PRODUCT
353 // Clear (non-shared space) pointers which could not be relevant
354 // if this (shared) method were mapped into another JVM.
355 void remove_unshareable_info();
357 // nmethod/verified compiler entry
358 address verified_code_entry();
359 bool check_code() const; // Not inline to avoid circular ref
360 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); }
361 void clear_code(); // Clear out any compiled code
362 static void set_code(methodHandle mh, nmethod* code);
363 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; }
364 address get_i2c_entry();
365 address get_c2i_entry();
366 address get_c2i_unverified_entry();
367 AdapterHandlerEntry* adapter() { return _adapter; }
368 // setup entry points
369 void link_method(methodHandle method, TRAPS);
370 // clear entry points. Used by sharing code
371 void unlink_method();
373 // vtable index
374 enum VtableIndexFlag {
375 // Valid vtable indexes are non-negative (>= 0).
376 // These few negative values are used as sentinels.
377 highest_unused_vtable_index_value = -5,
378 invalid_vtable_index = -4, // distinct from any valid vtable index
379 garbage_vtable_index = -3, // not yet linked; no vtable layout yet
380 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch
381 // 6330203 Note: Do not use -1, which was overloaded with many meanings.
382 };
383 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; })
384 int vtable_index() const { assert(valid_vtable_index(), "");
385 return _vtable_index; }
386 void set_vtable_index(int index) { _vtable_index = index; }
388 // interpreter entry
389 address interpreter_entry() const { return _i2i_entry; }
390 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry
391 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; }
392 int interpreter_kind(void) {
393 return constMethod()->interpreter_kind();
394 }
395 void set_interpreter_kind();
396 void set_interpreter_kind(int kind) {
397 constMethod()->set_interpreter_kind(kind);
398 }
400 // native function (used for native methods only)
401 enum {
402 native_bind_event_is_interesting = true
403 };
404 address native_function() const { return *(native_function_addr()); }
405 address critical_native_function();
407 // Must specify a real function (not NULL).
408 // Use clear_native_function() to unregister.
409 void set_native_function(address function, bool post_event_flag);
410 bool has_native_function() const;
411 void clear_native_function();
413 // signature handler (used for native methods only)
414 address signature_handler() const { return *(signature_handler_addr()); }
415 void set_signature_handler(address handler);
417 // Interpreter oopmap support
418 void mask_for(int bci, InterpreterOopMap* mask);
420 #ifndef PRODUCT
421 // operations on invocation counter
422 void print_invocation_count();
423 #endif
425 // byte codes
426 void set_code(address code) { return constMethod()->set_code(code); }
427 address code_base() const { return constMethod()->code_base(); }
428 bool contains(address bcp) const { return constMethod()->contains(bcp); }
430 // prints byte codes
431 void print_codes() const { print_codes_on(tty); }
432 void print_codes_on(outputStream* st) const PRODUCT_RETURN;
433 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN;
435 // checked exceptions
436 int checked_exceptions_length() const
437 { return constMethod()->checked_exceptions_length(); }
438 CheckedExceptionElement* checked_exceptions_start() const
439 { return constMethod()->checked_exceptions_start(); }
441 // localvariable table
442 bool has_localvariable_table() const
443 { return constMethod()->has_localvariable_table(); }
444 int localvariable_table_length() const
445 { return constMethod()->localvariable_table_length(); }
446 LocalVariableTableElement* localvariable_table_start() const
447 { return constMethod()->localvariable_table_start(); }
449 bool has_linenumber_table() const
450 { return constMethod()->has_linenumber_table(); }
451 u_char* compressed_linenumber_table() const
452 { return constMethod()->compressed_linenumber_table(); }
454 // method holder (the klassOop holding this method)
455 klassOop method_holder() const { return constants()->pool_holder(); }
457 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments)
458 Symbol* klass_name() const; // returns the name of the method holder
459 BasicType result_type() const; // type of the method result
460 int result_type_index() const; // type index of the method result
461 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); }
462 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); }
464 // Checked exceptions thrown by this method (resolved to mirrors)
465 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); }
467 // Access flags
468 bool is_public() const { return access_flags().is_public(); }
469 bool is_private() const { return access_flags().is_private(); }
470 bool is_protected() const { return access_flags().is_protected(); }
471 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
472 bool is_static() const { return access_flags().is_static(); }
473 bool is_final() const { return access_flags().is_final(); }
474 bool is_synchronized() const { return access_flags().is_synchronized();}
475 bool is_native() const { return access_flags().is_native(); }
476 bool is_abstract() const { return access_flags().is_abstract(); }
477 bool is_strict() const { return access_flags().is_strict(); }
478 bool is_synthetic() const { return access_flags().is_synthetic(); }
480 // returns true if contains only return operation
481 bool is_empty_method() const;
483 // returns true if this is a vanilla constructor
484 bool is_vanilla_constructor() const;
486 // checks method and its method holder
487 bool is_final_method() const;
488 bool is_strict_method() const;
490 // true if method needs no dynamic dispatch (final and/or no vtable entry)
491 bool can_be_statically_bound() const;
493 // returns true if the method has any backward branches.
494 bool has_loops() {
495 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag();
496 };
498 bool compute_has_loops_flag();
500 bool has_jsrs() {
501 return access_flags().has_jsrs();
502 };
503 void set_has_jsrs() {
504 _access_flags.set_has_jsrs();
505 }
507 // returns true if the method has any monitors.
508 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); }
509 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); }
511 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); }
513 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes
514 // propererly nest in the method. It might return false, even though they actually nest properly, since the info.
515 // has not been computed yet.
516 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); }
517 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); }
519 // returns true if the method is an accessor function (setter/getter).
520 bool is_accessor() const;
522 // returns true if the method is an initializer (<init> or <clinit>).
523 bool is_initializer() const;
525 // returns true if the method is static OR if the classfile version < 51
526 bool has_valid_initializer_flags() const;
528 // returns true if the method name is <clinit> and the method has
529 // valid static initializer flags.
530 bool is_static_initializer() const;
532 // compiled code support
533 // NOTE: code() is inherently racy as deopt can be clearing code
534 // simultaneously. Use with caution.
535 bool has_compiled_code() const { return code() != NULL; }
537 // sizing
538 static int object_size(bool is_native);
539 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; }
540 int object_size() const { return method_size(); }
542 bool object_is_parsable() const { return method_size() > 0; }
544 // interpreter support
545 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); }
546 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); }
547 #ifdef CC_INTERP
548 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); }
549 #endif /* CC_INTERP */
550 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); }
551 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); }
552 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); }
553 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); }
554 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); }
555 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); }
556 static ByteSize method_data_offset() {
557 return byte_offset_of(methodOopDesc, _method_data);
558 }
559 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); }
560 #ifndef PRODUCT
561 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); }
562 #endif // not PRODUCT
563 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); }
564 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); }
565 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); }
566 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); }
567 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); }
569 // for code generation
570 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); }
571 static int interpreter_invocation_counter_offset_in_bytes()
572 { return offset_of(methodOopDesc, _interpreter_invocation_count); }
573 static int intrinsic_id_offset_in_bytes() { return offset_of(methodOopDesc, _intrinsic_id); }
574 static int intrinsic_id_size_in_bytes() { return sizeof(u1); }
576 // Static methods that are used to implement member methods where an exposed this pointer
577 // is needed due to possible GCs
578 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS);
580 // Returns the byte code index from the byte code pointer
581 int bci_from(address bcp) const;
582 address bcp_from(int bci) const;
583 int validate_bci_from_bcx(intptr_t bcx) const;
585 // Returns the line number for a bci if debugging information for the method is prowided,
586 // -1 is returned otherwise.
587 int line_number_from_bci(int bci) const;
589 // Reflection support
590 bool is_overridden_in(klassOop k) const;
592 // JSR 292 support
593 bool is_method_handle_invoke() const { return access_flags().is_method_handle_invoke(); }
594 static bool is_method_handle_invoke_name(vmSymbols::SID name_sid);
595 static bool is_method_handle_invoke_name(Symbol* name) {
596 return is_method_handle_invoke_name(vmSymbols::find_sid(name));
597 }
598 // Tests if this method is an internal adapter frame from the
599 // MethodHandleCompiler.
600 bool is_method_handle_adapter() const;
601 static methodHandle make_invoke_method(KlassHandle holder,
602 Symbol* name, //invokeExact or invokeGeneric
603 Symbol* signature, //anything at all
604 Handle method_type,
605 TRAPS);
606 static klassOop check_non_bcp_klass(klassOop klass);
607 // these operate only on invoke methods:
608 oop method_handle_type() const;
609 static jint* method_type_offsets_chain(); // series of pointer-offsets, terminated by -1
610 // presize interpreter frames for extra interpreter stack entries, if needed
611 // method handles want to be able to push a few extra values (e.g., a bound receiver), and
612 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist,
613 // all without checking for a stack overflow
614 static int extra_stack_entries() { return EnableInvokeDynamic ? (int) MethodHandlePushLimit + 3 : 0; }
615 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize()
617 // RedefineClasses() support:
618 bool is_old() const { return access_flags().is_old(); }
619 void set_is_old() { _access_flags.set_is_old(); }
620 bool is_obsolete() const { return access_flags().is_obsolete(); }
621 void set_is_obsolete() { _access_flags.set_is_obsolete(); }
622 // see the definition in methodOop.cpp for the gory details
623 bool should_not_be_cached() const;
625 // JVMTI Native method prefixing support:
626 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); }
627 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); }
629 // Rewriting support
630 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length,
631 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS);
633 // Get this method's jmethodID -- allocate if it doesn't exist
634 jmethodID jmethod_id() { methodHandle this_h(this);
635 return instanceKlass::get_jmethod_id(method_holder(), this_h); }
637 // Lookup the jmethodID for this method. Return NULL if not found.
638 // NOTE that this function can be called from a signal handler
639 // (see AsyncGetCallTrace support for Forte Analyzer) and this
640 // needs to be async-safe. No allocation should be done and
641 // so handles are not used to avoid deadlock.
642 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); }
644 // JNI static invoke cached itable index accessors
645 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); }
646 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); }
648 // Support for inlining of intrinsic methods
649 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; }
650 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; }
652 // Helper routines for intrinsic_id() and vmIntrinsics::method().
653 void init_intrinsic_id(); // updates from _none if a match
654 static vmSymbols::SID klass_id_for_intrinsics(klassOop holder);
656 bool jfr_towrite() { return _jfr_towrite; }
657 void set_jfr_towrite(bool towrite) { _jfr_towrite = towrite; }
659 bool force_inline() { return _force_inline; }
660 void set_force_inline(bool fi) { _force_inline = fi; }
662 // On-stack replacement support
663 bool has_osr_nmethod(int level, bool match_level) {
664 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL;
665 }
667 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) {
668 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci, level, match_level);
669 }
671 // Inline cache support
672 void cleanup_inline_caches();
674 // Find if klass for method is loaded
675 bool is_klass_loaded_by_klass_index(int klass_index) const;
676 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const;
678 // Indicates whether compilation failed earlier for this method, or
679 // whether it is not compilable for another reason like having a
680 // breakpoint set in it.
681 bool is_not_compilable(int comp_level = CompLevel_any) const;
682 void set_not_compilable(int comp_level = CompLevel_all, bool report = true);
683 void set_not_compilable_quietly(int comp_level = CompLevel_all) {
684 set_not_compilable(comp_level, false);
685 }
686 bool is_not_osr_compilable(int comp_level = CompLevel_any) const {
687 return is_not_compilable(comp_level) || access_flags().is_not_osr_compilable();
688 }
689 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); }
690 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); }
691 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); }
692 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); }
693 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); }
695 // Background compilation support
696 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); }
697 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); }
698 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); }
700 // Resolve all classes in signature, return 'true' if successful
701 static bool load_signature_classes(methodHandle m, TRAPS);
703 // Return if true if not all classes references in signature, including return type, has been loaded
704 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS);
706 // Printing
707 void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM
708 void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)"
710 // Helper routine used for method sorting
711 static void sort_methods(objArrayOop methods,
712 objArrayOop methods_annotations,
713 objArrayOop methods_parameter_annotations,
714 objArrayOop methods_default_annotations,
715 bool idempotent = false);
717 // size of parameters
718 void set_size_of_parameters(int size) { _size_of_parameters = size; }
719 private:
721 // Inlined elements
722 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); }
723 address* signature_handler_addr() const { return native_function_addr() + 1; }
725 // Garbage collection support
726 oop* adr_constMethod() const { return (oop*)&_constMethod; }
727 oop* adr_method_data() const { return (oop*)&_method_data; }
728 };
731 // Utility class for compressing line number tables
733 class CompressedLineNumberWriteStream: public CompressedWriteStream {
734 private:
735 int _bci;
736 int _line;
737 public:
738 // Constructor
739 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {}
740 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {}
742 // Write (bci, line number) pair to stream
743 void write_pair_regular(int bci_delta, int line_delta);
745 inline void write_pair_inline(int bci, int line) {
746 int bci_delta = bci - _bci;
747 int line_delta = line - _line;
748 _bci = bci;
749 _line = line;
750 // Skip (0,0) deltas - they do not add information and conflict with terminator.
751 if (bci_delta == 0 && line_delta == 0) return;
752 // Check if bci is 5-bit and line number 3-bit unsigned.
753 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
754 // Compress into single byte.
755 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;
756 // Check that value doesn't match escape character.
757 if (value != 0xFF) {
758 write_byte(value);
759 return;
760 }
761 }
762 write_pair_regular(bci_delta, line_delta);
763 }
765 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair.
766 // Disabling optimization doesn't work for methods in header files
767 // so we force it to call through the non-optimized version in the .cpp.
768 // It's gross, but it's the only way we can ensure that all callers are
769 // fixed. _MSC_VER is defined by the windows compiler
770 #if defined(_M_AMD64) && _MSC_VER >= 1400
771 void write_pair(int bci, int line);
772 #else
773 void write_pair(int bci, int line) { write_pair_inline(bci, line); }
774 #endif
776 // Write end-of-stream marker
777 void write_terminator() { write_byte(0); }
778 };
781 // Utility class for decompressing line number tables
783 class CompressedLineNumberReadStream: public CompressedReadStream {
784 private:
785 int _bci;
786 int _line;
787 public:
788 // Constructor
789 CompressedLineNumberReadStream(u_char* buffer);
790 // Read (bci, line number) pair from stream. Returns false at end-of-stream.
791 bool read_pair();
792 // Accessing bci and line number (after calling read_pair)
793 int bci() const { return _bci; }
794 int line() const { return _line; }
795 };
798 /// Fast Breakpoints.
800 // If this structure gets more complicated (because bpts get numerous),
801 // move it into its own header.
803 // There is presently no provision for concurrent access
804 // to breakpoint lists, which is only OK for JVMTI because
805 // breakpoints are written only at safepoints, and are read
806 // concurrently only outside of safepoints.
808 class BreakpointInfo : public CHeapObj {
809 friend class VMStructs;
810 private:
811 Bytecodes::Code _orig_bytecode;
812 int _bci;
813 u2 _name_index; // of method
814 u2 _signature_index; // of method
815 BreakpointInfo* _next; // simple storage allocation
817 public:
818 BreakpointInfo(methodOop m, int bci);
820 // accessors
821 Bytecodes::Code orig_bytecode() { return _orig_bytecode; }
822 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; }
823 int bci() { return _bci; }
825 BreakpointInfo* next() const { return _next; }
826 void set_next(BreakpointInfo* n) { _next = n; }
828 // helps for searchers
829 bool match(const methodOopDesc* m, int bci) {
830 return bci == _bci && match(m);
831 }
833 bool match(const methodOopDesc* m) {
834 return _name_index == m->name_index() &&
835 _signature_index == m->signature_index();
836 }
838 void set(methodOop method);
839 void clear(methodOop method);
840 };
842 #endif // SHARE_VM_OOPS_METHODOOP_HPP