Tue, 07 Aug 2012 14:32:08 -0700
7188911: nightly failures after JSR 292 lazy method handle update (round 2)
Reviewed-by: kvn, jrose
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.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
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 _hidden : 1,
128 _dont_inline : 1,
129 : 4;
130 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
131 u2 _number_of_breakpoints; // fullspeed debugging support
132 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations
133 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations
135 #ifdef TIERED
136 jlong _prev_time; // Previous time the rate was acquired
137 float _rate; // Events (invocation and backedge counter increments) per millisecond
138 #endif
140 #ifndef PRODUCT
141 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging)
142 #endif
143 // Entry point for calling both from and to the interpreter.
144 address _i2i_entry; // All-args-on-stack calling convention
145 // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked.
146 AdapterHandlerEntry* _adapter;
147 // Entry point for calling from compiled code, to compiled code if it exists
148 // or else the interpreter.
149 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry()
150 // The entry point for calling both from and to compiled code is
151 // "_code->entry_point()". Because of tiered compilation and de-opt, this
152 // field can come and go. It can transition from NULL to not-null at any
153 // time (whenever a compile completes). It can transition from not-null to
154 // NULL only at safepoints (because of a de-opt).
155 nmethod* volatile _code; // Points to the corresponding piece of native code
156 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry
158 public:
160 // accessors for instance variables
161 constMethodOop constMethod() const { return _constMethod; }
162 void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); }
165 static address make_adapters(methodHandle mh, TRAPS);
166 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); }
167 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); }
169 // access flag
170 AccessFlags access_flags() const { return _access_flags; }
171 void set_access_flags(AccessFlags flags) { _access_flags = flags; }
173 // name
174 Symbol* name() const { return constants()->symbol_at(name_index()); }
175 int name_index() const { return constMethod()->name_index(); }
176 void set_name_index(int index) { constMethod()->set_name_index(index); }
178 // signature
179 Symbol* signature() const { return constants()->symbol_at(signature_index()); }
180 int signature_index() const { return constMethod()->signature_index(); }
181 void set_signature_index(int index) { constMethod()->set_signature_index(index); }
183 // generics support
184 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)NULL); }
185 int generic_signature_index() const { return constMethod()->generic_signature_index(); }
186 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); }
188 // annotations support
189 typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); }
190 typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); }
191 typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); }
193 #ifdef CC_INTERP
194 void set_result_index(BasicType type);
195 int result_index() { return _result_index; }
196 #endif
198 // Helper routine: get klass name + "." + method name + signature as
199 // C string, for the purpose of providing more useful NoSuchMethodErrors
200 // and fatal error handling. The string is allocated in resource
201 // area if a buffer is not provided by the caller.
202 char* name_and_sig_as_C_string() const;
203 char* name_and_sig_as_C_string(char* buf, int size) const;
205 // Static routine in the situations we don't have a methodOop
206 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature);
207 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size);
209 Bytecodes::Code java_code_at(int bci) const {
210 return Bytecodes::java_code_at(this, bcp_from(bci));
211 }
212 Bytecodes::Code code_at(int bci) const {
213 return Bytecodes::code_at(this, bcp_from(bci));
214 }
216 // JVMTI breakpoints
217 Bytecodes::Code orig_bytecode_at(int bci) const;
218 void set_orig_bytecode_at(int bci, Bytecodes::Code code);
219 void set_breakpoint(int bci);
220 void clear_breakpoint(int bci);
221 void clear_all_breakpoints();
222 // Tracking number of breakpoints, for fullspeed debugging.
223 // Only mutated by VM thread.
224 u2 number_of_breakpoints() const { return _number_of_breakpoints; }
225 void incr_number_of_breakpoints() { ++_number_of_breakpoints; }
226 void decr_number_of_breakpoints() { --_number_of_breakpoints; }
227 // Initialization only
228 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; }
230 // index into instanceKlass methods() array
231 // note: also used by jfr
232 u2 method_idnum() const { return constMethod()->method_idnum(); }
233 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); }
235 // code size
236 int code_size() const { return constMethod()->code_size(); }
238 // method size
239 int method_size() const { return _method_size; }
240 void set_method_size(int size) {
241 assert(0 <= size && size < (1 << 16), "invalid method size");
242 _method_size = size;
243 }
245 // constant pool for klassOop holding this method
246 constantPoolOop constants() const { return constMethod()->constants(); }
247 void set_constants(constantPoolOop c) { constMethod()->set_constants(c); }
249 // max stack
250 // return original max stack size for method verification
251 int verifier_max_stack() const { return _max_stack; }
252 int max_stack() const { return _max_stack + extra_stack_entries(); }
253 void set_max_stack(int size) { _max_stack = size; }
255 // max locals
256 int max_locals() const { return _max_locals; }
257 void set_max_locals(int size) { _max_locals = size; }
259 int highest_comp_level() const;
260 void set_highest_comp_level(int level);
261 int highest_osr_comp_level() const;
262 void set_highest_osr_comp_level(int level);
264 // Count of times method was exited via exception while interpreting
265 void interpreter_throwout_increment() {
266 if (_interpreter_throwout_count < 65534) {
267 _interpreter_throwout_count++;
268 }
269 }
271 int interpreter_throwout_count() const { return _interpreter_throwout_count; }
272 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; }
274 // size of parameters
275 int size_of_parameters() const { return _size_of_parameters; }
277 bool has_stackmap_table() const {
278 return constMethod()->has_stackmap_table();
279 }
281 typeArrayOop stackmap_data() const {
282 return constMethod()->stackmap_data();
283 }
285 void set_stackmap_data(typeArrayOop sd) {
286 constMethod()->set_stackmap_data(sd);
287 }
289 // exception handler table
290 bool has_exception_handler() const
291 { return constMethod()->has_exception_handler(); }
292 int exception_table_length() const
293 { return constMethod()->exception_table_length(); }
294 ExceptionTableElement* exception_table_start() const
295 { return constMethod()->exception_table_start(); }
297 // Finds the first entry point bci of an exception handler for an
298 // exception of klass ex_klass thrown at throw_bci. A value of NULL
299 // for ex_klass indicates that the exception klass is not known; in
300 // this case it matches any constraint class. Returns -1 if the
301 // exception cannot be handled in this method. The handler
302 // constraint classes are loaded if necessary. Note that this may
303 // throw an exception if loading of the constraint classes causes
304 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError.
305 // If an exception is thrown, returns the bci of the
306 // exception handler which caused the exception to be thrown, which
307 // is needed for proper retries. See, for example,
308 // InterpreterRuntime::exception_handler_for_exception.
309 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS);
311 // method data access
312 methodDataOop method_data() const {
313 return _method_data;
314 }
315 void set_method_data(methodDataOop data) {
316 oop_store_without_check((oop*)&_method_data, (oop)data);
317 }
319 // invocation counter
320 InvocationCounter* invocation_counter() { return &_invocation_counter; }
321 InvocationCounter* backedge_counter() { return &_backedge_counter; }
323 #ifdef TIERED
324 // We are reusing interpreter_invocation_count as a holder for the previous event count!
325 // We can do that since interpreter_invocation_count is not used in tiered.
326 int prev_event_count() const { return _interpreter_invocation_count; }
327 void set_prev_event_count(int count) { _interpreter_invocation_count = count; }
328 jlong prev_time() const { return _prev_time; }
329 void set_prev_time(jlong time) { _prev_time = time; }
330 float rate() const { return _rate; }
331 void set_rate(float rate) { _rate = rate; }
332 #endif
334 int invocation_count();
335 int backedge_count();
337 bool was_executed_more_than(int n);
338 bool was_never_executed() { return !was_executed_more_than(0); }
340 static void build_interpreter_method_data(methodHandle method, TRAPS);
342 int interpreter_invocation_count() {
343 if (TieredCompilation) return invocation_count();
344 else return _interpreter_invocation_count;
345 }
346 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; }
347 int increment_interpreter_invocation_count() {
348 if (TieredCompilation) ShouldNotReachHere();
349 return ++_interpreter_invocation_count;
350 }
352 #ifndef PRODUCT
353 int compiled_invocation_count() const { return _compiled_invocation_count; }
354 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; }
355 #endif // not PRODUCT
357 // Clear (non-shared space) pointers which could not be relevant
358 // if this (shared) method were mapped into another JVM.
359 void remove_unshareable_info();
361 // nmethod/verified compiler entry
362 address verified_code_entry();
363 bool check_code() const; // Not inline to avoid circular ref
364 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); }
365 void clear_code(); // Clear out any compiled code
366 static void set_code(methodHandle mh, nmethod* code);
367 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; }
368 address get_i2c_entry();
369 address get_c2i_entry();
370 address get_c2i_unverified_entry();
371 AdapterHandlerEntry* adapter() { return _adapter; }
372 // setup entry points
373 void link_method(methodHandle method, TRAPS);
374 // clear entry points. Used by sharing code
375 void unlink_method();
377 // vtable index
378 enum VtableIndexFlag {
379 // Valid vtable indexes are non-negative (>= 0).
380 // These few negative values are used as sentinels.
381 highest_unused_vtable_index_value = -5,
382 invalid_vtable_index = -4, // distinct from any valid vtable index
383 garbage_vtable_index = -3, // not yet linked; no vtable layout yet
384 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch
385 // 6330203 Note: Do not use -1, which was overloaded with many meanings.
386 };
387 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; })
388 int vtable_index() const { assert(valid_vtable_index(), "");
389 return _vtable_index; }
390 void set_vtable_index(int index) { _vtable_index = index; }
392 // interpreter entry
393 address interpreter_entry() const { return _i2i_entry; }
394 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry
395 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; }
396 int interpreter_kind(void) {
397 return constMethod()->interpreter_kind();
398 }
399 void set_interpreter_kind();
400 void set_interpreter_kind(int kind) {
401 constMethod()->set_interpreter_kind(kind);
402 }
404 // native function (used for native methods only)
405 enum {
406 native_bind_event_is_interesting = true
407 };
408 address native_function() const { return *(native_function_addr()); }
409 address critical_native_function();
411 // Must specify a real function (not NULL).
412 // Use clear_native_function() to unregister.
413 void set_native_function(address function, bool post_event_flag);
414 bool has_native_function() const;
415 void clear_native_function();
417 // signature handler (used for native methods only)
418 address signature_handler() const { return *(signature_handler_addr()); }
419 void set_signature_handler(address handler);
421 // Interpreter oopmap support
422 void mask_for(int bci, InterpreterOopMap* mask);
424 #ifndef PRODUCT
425 // operations on invocation counter
426 void print_invocation_count();
427 #endif
429 // byte codes
430 void set_code(address code) { return constMethod()->set_code(code); }
431 address code_base() const { return constMethod()->code_base(); }
432 bool contains(address bcp) const { return constMethod()->contains(bcp); }
434 // prints byte codes
435 void print_codes() const { print_codes_on(tty); }
436 void print_codes_on(outputStream* st) const PRODUCT_RETURN;
437 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN;
439 // checked exceptions
440 int checked_exceptions_length() const
441 { return constMethod()->checked_exceptions_length(); }
442 CheckedExceptionElement* checked_exceptions_start() const
443 { return constMethod()->checked_exceptions_start(); }
445 // localvariable table
446 bool has_localvariable_table() const
447 { return constMethod()->has_localvariable_table(); }
448 int localvariable_table_length() const
449 { return constMethod()->localvariable_table_length(); }
450 LocalVariableTableElement* localvariable_table_start() const
451 { return constMethod()->localvariable_table_start(); }
453 bool has_linenumber_table() const
454 { return constMethod()->has_linenumber_table(); }
455 u_char* compressed_linenumber_table() const
456 { return constMethod()->compressed_linenumber_table(); }
458 // method holder (the klassOop holding this method)
459 klassOop method_holder() const { return constants()->pool_holder(); }
461 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments)
462 Symbol* klass_name() const; // returns the name of the method holder
463 BasicType result_type() const; // type of the method result
464 int result_type_index() const; // type index of the method result
465 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); }
466 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); }
468 // Checked exceptions thrown by this method (resolved to mirrors)
469 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); }
471 // Access flags
472 bool is_public() const { return access_flags().is_public(); }
473 bool is_private() const { return access_flags().is_private(); }
474 bool is_protected() const { return access_flags().is_protected(); }
475 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
476 bool is_static() const { return access_flags().is_static(); }
477 bool is_final() const { return access_flags().is_final(); }
478 bool is_synchronized() const { return access_flags().is_synchronized();}
479 bool is_native() const { return access_flags().is_native(); }
480 bool is_abstract() const { return access_flags().is_abstract(); }
481 bool is_strict() const { return access_flags().is_strict(); }
482 bool is_synthetic() const { return access_flags().is_synthetic(); }
484 // returns true if contains only return operation
485 bool is_empty_method() const;
487 // returns true if this is a vanilla constructor
488 bool is_vanilla_constructor() const;
490 // checks method and its method holder
491 bool is_final_method() const;
492 bool is_strict_method() const;
494 // true if method needs no dynamic dispatch (final and/or no vtable entry)
495 bool can_be_statically_bound() const;
497 // returns true if the method has any backward branches.
498 bool has_loops() {
499 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag();
500 };
502 bool compute_has_loops_flag();
504 bool has_jsrs() {
505 return access_flags().has_jsrs();
506 };
507 void set_has_jsrs() {
508 _access_flags.set_has_jsrs();
509 }
511 // returns true if the method has any monitors.
512 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); }
513 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); }
515 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); }
517 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes
518 // propererly nest in the method. It might return false, even though they actually nest properly, since the info.
519 // has not been computed yet.
520 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); }
521 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); }
523 // returns true if the method is an accessor function (setter/getter).
524 bool is_accessor() const;
526 // returns true if the method is an initializer (<init> or <clinit>).
527 bool is_initializer() const;
529 // returns true if the method is static OR if the classfile version < 51
530 bool has_valid_initializer_flags() const;
532 // returns true if the method name is <clinit> and the method has
533 // valid static initializer flags.
534 bool is_static_initializer() const;
536 // compiled code support
537 // NOTE: code() is inherently racy as deopt can be clearing code
538 // simultaneously. Use with caution.
539 bool has_compiled_code() const { return code() != NULL; }
541 // sizing
542 static int object_size(bool is_native);
543 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; }
544 int object_size() const { return method_size(); }
546 bool object_is_parsable() const { return method_size() > 0; }
548 // interpreter support
549 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); }
550 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); }
551 #ifdef CC_INTERP
552 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); }
553 #endif /* CC_INTERP */
554 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); }
555 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); }
556 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); }
557 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); }
558 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); }
559 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); }
560 static ByteSize method_data_offset() {
561 return byte_offset_of(methodOopDesc, _method_data);
562 }
563 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); }
564 #ifndef PRODUCT
565 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); }
566 #endif // not PRODUCT
567 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); }
568 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); }
569 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); }
570 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); }
571 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); }
573 // for code generation
574 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); }
575 static int interpreter_invocation_counter_offset_in_bytes()
576 { return offset_of(methodOopDesc, _interpreter_invocation_count); }
577 static int intrinsic_id_offset_in_bytes() { return offset_of(methodOopDesc, _intrinsic_id); }
578 static int intrinsic_id_size_in_bytes() { return sizeof(u1); }
580 // Static methods that are used to implement member methods where an exposed this pointer
581 // is needed due to possible GCs
582 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS);
584 // Returns the byte code index from the byte code pointer
585 int bci_from(address bcp) const;
586 address bcp_from(int bci) const;
587 int validate_bci_from_bcx(intptr_t bcx) const;
589 // Returns the line number for a bci if debugging information for the method is prowided,
590 // -1 is returned otherwise.
591 int line_number_from_bci(int bci) const;
593 // Reflection support
594 bool is_overridden_in(klassOop k) const;
596 // JSR 292 support
597 bool is_method_handle_intrinsic() const; // MethodHandles::is_signature_polymorphic_intrinsic(intrinsic_id)
598 bool is_compiled_lambda_form() const; // intrinsic_id() == vmIntrinsics::_compiledLambdaForm
599 bool has_member_arg() const; // intrinsic_id() == vmIntrinsics::_linkToSpecial, etc.
600 static methodHandle make_method_handle_intrinsic(vmIntrinsics::ID iid, // _invokeBasic, _linkToVirtual
601 Symbol* signature, //anything at all
602 TRAPS);
603 static klassOop check_non_bcp_klass(klassOop klass);
604 // these operate only on invoke methods:
605 // presize interpreter frames for extra interpreter stack entries, if needed
606 // method handles want to be able to push a few extra values (e.g., a bound receiver), and
607 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist,
608 // all without checking for a stack overflow
609 static int extra_stack_entries() { return EnableInvokeDynamic ? 2 : 0; }
610 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize()
612 // RedefineClasses() support:
613 bool is_old() const { return access_flags().is_old(); }
614 void set_is_old() { _access_flags.set_is_old(); }
615 bool is_obsolete() const { return access_flags().is_obsolete(); }
616 void set_is_obsolete() { _access_flags.set_is_obsolete(); }
617 // see the definition in methodOop.cpp for the gory details
618 bool should_not_be_cached() const;
620 // JVMTI Native method prefixing support:
621 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); }
622 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); }
624 // Rewriting support
625 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length,
626 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS);
628 // Get this method's jmethodID -- allocate if it doesn't exist
629 jmethodID jmethod_id() { methodHandle this_h(this);
630 return instanceKlass::get_jmethod_id(method_holder(), this_h); }
632 // Lookup the jmethodID for this method. Return NULL if not found.
633 // NOTE that this function can be called from a signal handler
634 // (see AsyncGetCallTrace support for Forte Analyzer) and this
635 // needs to be async-safe. No allocation should be done and
636 // so handles are not used to avoid deadlock.
637 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); }
639 // JNI static invoke cached itable index accessors
640 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); }
641 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); }
643 // Support for inlining of intrinsic methods
644 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; }
645 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; }
647 // Helper routines for intrinsic_id() and vmIntrinsics::method().
648 void init_intrinsic_id(); // updates from _none if a match
649 static vmSymbols::SID klass_id_for_intrinsics(klassOop holder);
651 bool jfr_towrite() { return _jfr_towrite; }
652 void set_jfr_towrite(bool towrite) { _jfr_towrite = towrite; }
654 bool force_inline() { return _force_inline; }
655 void set_force_inline(bool x) { _force_inline = x; }
656 bool dont_inline() { return _dont_inline; }
657 void set_dont_inline(bool x) { _dont_inline = x; }
658 bool is_hidden() { return _hidden; }
659 void set_hidden(bool x) { _hidden = x; }
661 // On-stack replacement support
662 bool has_osr_nmethod(int level, bool match_level) {
663 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL;
664 }
666 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) {
667 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci, level, match_level);
668 }
670 // Inline cache support
671 void cleanup_inline_caches();
673 // Find if klass for method is loaded
674 bool is_klass_loaded_by_klass_index(int klass_index) const;
675 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const;
677 // Indicates whether compilation failed earlier for this method, or
678 // whether it is not compilable for another reason like having a
679 // breakpoint set in it.
680 bool is_not_compilable(int comp_level = CompLevel_any) const;
681 void set_not_compilable(int comp_level = CompLevel_all, bool report = true);
682 void set_not_compilable_quietly(int comp_level = CompLevel_all) {
683 set_not_compilable(comp_level, false);
684 }
685 bool is_not_osr_compilable(int comp_level = CompLevel_any) const {
686 return is_not_compilable(comp_level) || access_flags().is_not_osr_compilable();
687 }
688 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); }
689 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); }
690 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); }
691 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); }
692 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); }
694 // Background compilation support
695 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); }
696 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); }
697 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); }
699 // Resolve all classes in signature, return 'true' if successful
700 static bool load_signature_classes(methodHandle m, TRAPS);
702 // Return if true if not all classes references in signature, including return type, has been loaded
703 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS);
705 // Printing
706 void print_short_name(outputStream* st = tty) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM
707 void print_name(outputStream* st = tty) PRODUCT_RETURN; // prints as "virtual void foo(int)"
709 // Helper routine used for method sorting
710 static void sort_methods(objArrayOop methods,
711 objArrayOop methods_annotations,
712 objArrayOop methods_parameter_annotations,
713 objArrayOop methods_default_annotations,
714 bool idempotent = false);
716 // size of parameters
717 void set_size_of_parameters(int size) { _size_of_parameters = size; }
718 private:
720 // Inlined elements
721 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); }
722 address* signature_handler_addr() const { return native_function_addr() + 1; }
724 // Garbage collection support
725 oop* adr_constMethod() const { return (oop*)&_constMethod; }
726 oop* adr_method_data() const { return (oop*)&_method_data; }
727 };
730 // Utility class for compressing line number tables
732 class CompressedLineNumberWriteStream: public CompressedWriteStream {
733 private:
734 int _bci;
735 int _line;
736 public:
737 // Constructor
738 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {}
739 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {}
741 // Write (bci, line number) pair to stream
742 void write_pair_regular(int bci_delta, int line_delta);
744 inline void write_pair_inline(int bci, int line) {
745 int bci_delta = bci - _bci;
746 int line_delta = line - _line;
747 _bci = bci;
748 _line = line;
749 // Skip (0,0) deltas - they do not add information and conflict with terminator.
750 if (bci_delta == 0 && line_delta == 0) return;
751 // Check if bci is 5-bit and line number 3-bit unsigned.
752 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
753 // Compress into single byte.
754 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;
755 // Check that value doesn't match escape character.
756 if (value != 0xFF) {
757 write_byte(value);
758 return;
759 }
760 }
761 write_pair_regular(bci_delta, line_delta);
762 }
764 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair.
765 // Disabling optimization doesn't work for methods in header files
766 // so we force it to call through the non-optimized version in the .cpp.
767 // It's gross, but it's the only way we can ensure that all callers are
768 // fixed. _MSC_VER is defined by the windows compiler
769 #if defined(_M_AMD64) && _MSC_VER >= 1400
770 void write_pair(int bci, int line);
771 #else
772 void write_pair(int bci, int line) { write_pair_inline(bci, line); }
773 #endif
775 // Write end-of-stream marker
776 void write_terminator() { write_byte(0); }
777 };
780 // Utility class for decompressing line number tables
782 class CompressedLineNumberReadStream: public CompressedReadStream {
783 private:
784 int _bci;
785 int _line;
786 public:
787 // Constructor
788 CompressedLineNumberReadStream(u_char* buffer);
789 // Read (bci, line number) pair from stream. Returns false at end-of-stream.
790 bool read_pair();
791 // Accessing bci and line number (after calling read_pair)
792 int bci() const { return _bci; }
793 int line() const { return _line; }
794 };
797 /// Fast Breakpoints.
799 // If this structure gets more complicated (because bpts get numerous),
800 // move it into its own header.
802 // There is presently no provision for concurrent access
803 // to breakpoint lists, which is only OK for JVMTI because
804 // breakpoints are written only at safepoints, and are read
805 // concurrently only outside of safepoints.
807 class BreakpointInfo : public CHeapObj<mtClass> {
808 friend class VMStructs;
809 private:
810 Bytecodes::Code _orig_bytecode;
811 int _bci;
812 u2 _name_index; // of method
813 u2 _signature_index; // of method
814 BreakpointInfo* _next; // simple storage allocation
816 public:
817 BreakpointInfo(methodOop m, int bci);
819 // accessors
820 Bytecodes::Code orig_bytecode() { return _orig_bytecode; }
821 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; }
822 int bci() { return _bci; }
824 BreakpointInfo* next() const { return _next; }
825 void set_next(BreakpointInfo* n) { _next = n; }
827 // helps for searchers
828 bool match(const methodOopDesc* m, int bci) {
829 return bci == _bci && match(m);
830 }
832 bool match(const methodOopDesc* m) {
833 return _name_index == m->name_index() &&
834 _signature_index == m->signature_index();
835 }
837 void set(methodOop method);
838 void clear(methodOop method);
839 };
841 // Utility class for access exception handlers
842 class ExceptionTable : public StackObj {
843 private:
844 ExceptionTableElement* _table;
845 u2 _length;
847 public:
848 ExceptionTable(methodOop m) {
849 if (m->has_exception_handler()) {
850 _table = m->exception_table_start();
851 _length = m->exception_table_length();
852 } else {
853 _table = NULL;
854 _length = 0;
855 }
856 }
858 int length() const {
859 return _length;
860 }
862 u2 start_pc(int idx) const {
863 assert(idx < _length, "out of bounds");
864 return _table[idx].start_pc;
865 }
867 void set_start_pc(int idx, u2 value) {
868 assert(idx < _length, "out of bounds");
869 _table[idx].start_pc = value;
870 }
872 u2 end_pc(int idx) const {
873 assert(idx < _length, "out of bounds");
874 return _table[idx].end_pc;
875 }
877 void set_end_pc(int idx, u2 value) {
878 assert(idx < _length, "out of bounds");
879 _table[idx].end_pc = value;
880 }
882 u2 handler_pc(int idx) const {
883 assert(idx < _length, "out of bounds");
884 return _table[idx].handler_pc;
885 }
887 void set_handler_pc(int idx, u2 value) {
888 assert(idx < _length, "out of bounds");
889 _table[idx].handler_pc = value;
890 }
892 u2 catch_type_index(int idx) const {
893 assert(idx < _length, "out of bounds");
894 return _table[idx].catch_type_index;
895 }
897 void set_catch_type_index(int idx, u2 value) {
898 assert(idx < _length, "out of bounds");
899 _table[idx].catch_type_index = value;
900 }
901 };
903 #endif // SHARE_VM_OOPS_METHODOOP_HPP