Tue, 24 Jul 2012 10:51:00 -0700
7023639: JSR 292 method handle invocation needs a fast path for compiled code
6984705: JSR 292 method handle creation should not go through JNI
Summary: remove assembly code for JDK 7 chained method handles
Reviewed-by: jrose, twisti, kvn, mhaupt
Contributed-by: John Rose <john.r.rose@oracle.com>, Christian Thalinger <christian.thalinger@oracle.com>, Michael Haupt <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.
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 int max_stack() const { return _max_stack + extra_stack_entries(); }
251 void set_max_stack(int size) { _max_stack = size; }
253 // max locals
254 int max_locals() const { return _max_locals; }
255 void set_max_locals(int size) { _max_locals = size; }
257 int highest_comp_level() const;
258 void set_highest_comp_level(int level);
259 int highest_osr_comp_level() const;
260 void set_highest_osr_comp_level(int level);
262 // Count of times method was exited via exception while interpreting
263 void interpreter_throwout_increment() {
264 if (_interpreter_throwout_count < 65534) {
265 _interpreter_throwout_count++;
266 }
267 }
269 int interpreter_throwout_count() const { return _interpreter_throwout_count; }
270 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; }
272 // size of parameters
273 int size_of_parameters() const { return _size_of_parameters; }
275 bool has_stackmap_table() const {
276 return constMethod()->has_stackmap_table();
277 }
279 typeArrayOop stackmap_data() const {
280 return constMethod()->stackmap_data();
281 }
283 void set_stackmap_data(typeArrayOop sd) {
284 constMethod()->set_stackmap_data(sd);
285 }
287 // exception handler table
288 bool has_exception_handler() const
289 { return constMethod()->has_exception_handler(); }
290 int exception_table_length() const
291 { return constMethod()->exception_table_length(); }
292 ExceptionTableElement* exception_table_start() const
293 { return constMethod()->exception_table_start(); }
295 // Finds the first entry point bci of an exception handler for an
296 // exception of klass ex_klass thrown at throw_bci. A value of NULL
297 // for ex_klass indicates that the exception klass is not known; in
298 // this case it matches any constraint class. Returns -1 if the
299 // exception cannot be handled in this method. The handler
300 // constraint classes are loaded if necessary. Note that this may
301 // throw an exception if loading of the constraint classes causes
302 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError.
303 // If an exception is thrown, returns the bci of the
304 // exception handler which caused the exception to be thrown, which
305 // is needed for proper retries. See, for example,
306 // InterpreterRuntime::exception_handler_for_exception.
307 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS);
309 // method data access
310 methodDataOop method_data() const {
311 return _method_data;
312 }
313 void set_method_data(methodDataOop data) {
314 oop_store_without_check((oop*)&_method_data, (oop)data);
315 }
317 // invocation counter
318 InvocationCounter* invocation_counter() { return &_invocation_counter; }
319 InvocationCounter* backedge_counter() { return &_backedge_counter; }
321 #ifdef TIERED
322 // We are reusing interpreter_invocation_count as a holder for the previous event count!
323 // We can do that since interpreter_invocation_count is not used in tiered.
324 int prev_event_count() const { return _interpreter_invocation_count; }
325 void set_prev_event_count(int count) { _interpreter_invocation_count = count; }
326 jlong prev_time() const { return _prev_time; }
327 void set_prev_time(jlong time) { _prev_time = time; }
328 float rate() const { return _rate; }
329 void set_rate(float rate) { _rate = rate; }
330 #endif
332 int invocation_count();
333 int backedge_count();
335 bool was_executed_more_than(int n);
336 bool was_never_executed() { return !was_executed_more_than(0); }
338 static void build_interpreter_method_data(methodHandle method, TRAPS);
340 int interpreter_invocation_count() {
341 if (TieredCompilation) return invocation_count();
342 else return _interpreter_invocation_count;
343 }
344 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; }
345 int increment_interpreter_invocation_count() {
346 if (TieredCompilation) ShouldNotReachHere();
347 return ++_interpreter_invocation_count;
348 }
350 #ifndef PRODUCT
351 int compiled_invocation_count() const { return _compiled_invocation_count; }
352 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; }
353 #endif // not PRODUCT
355 // Clear (non-shared space) pointers which could not be relevant
356 // if this (shared) method were mapped into another JVM.
357 void remove_unshareable_info();
359 // nmethod/verified compiler entry
360 address verified_code_entry();
361 bool check_code() const; // Not inline to avoid circular ref
362 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); }
363 void clear_code(); // Clear out any compiled code
364 static void set_code(methodHandle mh, nmethod* code);
365 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; }
366 address get_i2c_entry();
367 address get_c2i_entry();
368 address get_c2i_unverified_entry();
369 AdapterHandlerEntry* adapter() { return _adapter; }
370 // setup entry points
371 void link_method(methodHandle method, TRAPS);
372 // clear entry points. Used by sharing code
373 void unlink_method();
375 // vtable index
376 enum VtableIndexFlag {
377 // Valid vtable indexes are non-negative (>= 0).
378 // These few negative values are used as sentinels.
379 highest_unused_vtable_index_value = -5,
380 invalid_vtable_index = -4, // distinct from any valid vtable index
381 garbage_vtable_index = -3, // not yet linked; no vtable layout yet
382 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch
383 // 6330203 Note: Do not use -1, which was overloaded with many meanings.
384 };
385 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; })
386 int vtable_index() const { assert(valid_vtable_index(), "");
387 return _vtable_index; }
388 void set_vtable_index(int index) { _vtable_index = index; }
390 // interpreter entry
391 address interpreter_entry() const { return _i2i_entry; }
392 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry
393 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; }
394 int interpreter_kind(void) {
395 return constMethod()->interpreter_kind();
396 }
397 void set_interpreter_kind();
398 void set_interpreter_kind(int kind) {
399 constMethod()->set_interpreter_kind(kind);
400 }
402 // native function (used for native methods only)
403 enum {
404 native_bind_event_is_interesting = true
405 };
406 address native_function() const { return *(native_function_addr()); }
407 address critical_native_function();
409 // Must specify a real function (not NULL).
410 // Use clear_native_function() to unregister.
411 void set_native_function(address function, bool post_event_flag);
412 bool has_native_function() const;
413 void clear_native_function();
415 // signature handler (used for native methods only)
416 address signature_handler() const { return *(signature_handler_addr()); }
417 void set_signature_handler(address handler);
419 // Interpreter oopmap support
420 void mask_for(int bci, InterpreterOopMap* mask);
422 #ifndef PRODUCT
423 // operations on invocation counter
424 void print_invocation_count();
425 #endif
427 // byte codes
428 void set_code(address code) { return constMethod()->set_code(code); }
429 address code_base() const { return constMethod()->code_base(); }
430 bool contains(address bcp) const { return constMethod()->contains(bcp); }
432 // prints byte codes
433 void print_codes() const { print_codes_on(tty); }
434 void print_codes_on(outputStream* st) const PRODUCT_RETURN;
435 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN;
437 // checked exceptions
438 int checked_exceptions_length() const
439 { return constMethod()->checked_exceptions_length(); }
440 CheckedExceptionElement* checked_exceptions_start() const
441 { return constMethod()->checked_exceptions_start(); }
443 // localvariable table
444 bool has_localvariable_table() const
445 { return constMethod()->has_localvariable_table(); }
446 int localvariable_table_length() const
447 { return constMethod()->localvariable_table_length(); }
448 LocalVariableTableElement* localvariable_table_start() const
449 { return constMethod()->localvariable_table_start(); }
451 bool has_linenumber_table() const
452 { return constMethod()->has_linenumber_table(); }
453 u_char* compressed_linenumber_table() const
454 { return constMethod()->compressed_linenumber_table(); }
456 // method holder (the klassOop holding this method)
457 klassOop method_holder() const { return constants()->pool_holder(); }
459 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments)
460 Symbol* klass_name() const; // returns the name of the method holder
461 BasicType result_type() const; // type of the method result
462 int result_type_index() const; // type index of the method result
463 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); }
464 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); }
466 // Checked exceptions thrown by this method (resolved to mirrors)
467 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); }
469 // Access flags
470 bool is_public() const { return access_flags().is_public(); }
471 bool is_private() const { return access_flags().is_private(); }
472 bool is_protected() const { return access_flags().is_protected(); }
473 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
474 bool is_static() const { return access_flags().is_static(); }
475 bool is_final() const { return access_flags().is_final(); }
476 bool is_synchronized() const { return access_flags().is_synchronized();}
477 bool is_native() const { return access_flags().is_native(); }
478 bool is_abstract() const { return access_flags().is_abstract(); }
479 bool is_strict() const { return access_flags().is_strict(); }
480 bool is_synthetic() const { return access_flags().is_synthetic(); }
482 // returns true if contains only return operation
483 bool is_empty_method() const;
485 // returns true if this is a vanilla constructor
486 bool is_vanilla_constructor() const;
488 // checks method and its method holder
489 bool is_final_method() const;
490 bool is_strict_method() const;
492 // true if method needs no dynamic dispatch (final and/or no vtable entry)
493 bool can_be_statically_bound() const;
495 // returns true if the method has any backward branches.
496 bool has_loops() {
497 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag();
498 };
500 bool compute_has_loops_flag();
502 bool has_jsrs() {
503 return access_flags().has_jsrs();
504 };
505 void set_has_jsrs() {
506 _access_flags.set_has_jsrs();
507 }
509 // returns true if the method has any monitors.
510 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); }
511 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); }
513 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); }
515 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes
516 // propererly nest in the method. It might return false, even though they actually nest properly, since the info.
517 // has not been computed yet.
518 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); }
519 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); }
521 // returns true if the method is an accessor function (setter/getter).
522 bool is_accessor() const;
524 // returns true if the method is an initializer (<init> or <clinit>).
525 bool is_initializer() const;
527 // returns true if the method is static OR if the classfile version < 51
528 bool has_valid_initializer_flags() const;
530 // returns true if the method name is <clinit> and the method has
531 // valid static initializer flags.
532 bool is_static_initializer() const;
534 // compiled code support
535 // NOTE: code() is inherently racy as deopt can be clearing code
536 // simultaneously. Use with caution.
537 bool has_compiled_code() const { return code() != NULL; }
539 // sizing
540 static int object_size(bool is_native);
541 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; }
542 int object_size() const { return method_size(); }
544 bool object_is_parsable() const { return method_size() > 0; }
546 // interpreter support
547 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); }
548 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); }
549 #ifdef CC_INTERP
550 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); }
551 #endif /* CC_INTERP */
552 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); }
553 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); }
554 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); }
555 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); }
556 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); }
557 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); }
558 static ByteSize method_data_offset() {
559 return byte_offset_of(methodOopDesc, _method_data);
560 }
561 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); }
562 #ifndef PRODUCT
563 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); }
564 #endif // not PRODUCT
565 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); }
566 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); }
567 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); }
568 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); }
569 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); }
571 // for code generation
572 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); }
573 static int interpreter_invocation_counter_offset_in_bytes()
574 { return offset_of(methodOopDesc, _interpreter_invocation_count); }
575 static int intrinsic_id_offset_in_bytes() { return offset_of(methodOopDesc, _intrinsic_id); }
576 static int intrinsic_id_size_in_bytes() { return sizeof(u1); }
578 // Static methods that are used to implement member methods where an exposed this pointer
579 // is needed due to possible GCs
580 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS);
582 // Returns the byte code index from the byte code pointer
583 int bci_from(address bcp) const;
584 address bcp_from(int bci) const;
585 int validate_bci_from_bcx(intptr_t bcx) const;
587 // Returns the line number for a bci if debugging information for the method is prowided,
588 // -1 is returned otherwise.
589 int line_number_from_bci(int bci) const;
591 // Reflection support
592 bool is_overridden_in(klassOop k) const;
594 // JSR 292 support
595 bool is_method_handle_intrinsic() const; // MethodHandles::is_signature_polymorphic_intrinsic(intrinsic_id)
596 bool is_compiled_lambda_form() const; // intrinsic_id() == vmIntrinsics::_compiledLambdaForm
597 bool has_member_arg() const; // intrinsic_id() == vmIntrinsics::_linkToSpecial, etc.
598 static methodHandle make_method_handle_intrinsic(vmIntrinsics::ID iid, // _invokeBasic, _linkToVirtual
599 Symbol* signature, //anything at all
600 TRAPS);
601 static klassOop check_non_bcp_klass(klassOop klass);
602 // these operate only on invoke methods:
603 // presize interpreter frames for extra interpreter stack entries, if needed
604 // method handles want to be able to push a few extra values (e.g., a bound receiver), and
605 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist,
606 // all without checking for a stack overflow
607 static int extra_stack_entries() { return EnableInvokeDynamic ? 2 : 0; }
608 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize()
610 // RedefineClasses() support:
611 bool is_old() const { return access_flags().is_old(); }
612 void set_is_old() { _access_flags.set_is_old(); }
613 bool is_obsolete() const { return access_flags().is_obsolete(); }
614 void set_is_obsolete() { _access_flags.set_is_obsolete(); }
615 // see the definition in methodOop.cpp for the gory details
616 bool should_not_be_cached() const;
618 // JVMTI Native method prefixing support:
619 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); }
620 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); }
622 // Rewriting support
623 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length,
624 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS);
626 // Get this method's jmethodID -- allocate if it doesn't exist
627 jmethodID jmethod_id() { methodHandle this_h(this);
628 return instanceKlass::get_jmethod_id(method_holder(), this_h); }
630 // Lookup the jmethodID for this method. Return NULL if not found.
631 // NOTE that this function can be called from a signal handler
632 // (see AsyncGetCallTrace support for Forte Analyzer) and this
633 // needs to be async-safe. No allocation should be done and
634 // so handles are not used to avoid deadlock.
635 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); }
637 // JNI static invoke cached itable index accessors
638 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); }
639 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); }
641 // Support for inlining of intrinsic methods
642 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; }
643 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; }
645 // Helper routines for intrinsic_id() and vmIntrinsics::method().
646 void init_intrinsic_id(); // updates from _none if a match
647 static vmSymbols::SID klass_id_for_intrinsics(klassOop holder);
649 bool jfr_towrite() { return _jfr_towrite; }
650 void set_jfr_towrite(bool towrite) { _jfr_towrite = towrite; }
652 bool force_inline() { return _force_inline; }
653 void set_force_inline(bool x) { _force_inline = x; }
654 bool dont_inline() { return _dont_inline; }
655 void set_dont_inline(bool x) { _dont_inline = x; }
656 bool is_hidden() { return _hidden; }
657 void set_hidden(bool x) { _hidden = x; }
659 // On-stack replacement support
660 bool has_osr_nmethod(int level, bool match_level) {
661 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL;
662 }
664 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) {
665 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci, level, match_level);
666 }
668 // Inline cache support
669 void cleanup_inline_caches();
671 // Find if klass for method is loaded
672 bool is_klass_loaded_by_klass_index(int klass_index) const;
673 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const;
675 // Indicates whether compilation failed earlier for this method, or
676 // whether it is not compilable for another reason like having a
677 // breakpoint set in it.
678 bool is_not_compilable(int comp_level = CompLevel_any) const;
679 void set_not_compilable(int comp_level = CompLevel_all, bool report = true);
680 void set_not_compilable_quietly(int comp_level = CompLevel_all) {
681 set_not_compilable(comp_level, false);
682 }
683 bool is_not_osr_compilable(int comp_level = CompLevel_any) const {
684 return is_not_compilable(comp_level) || access_flags().is_not_osr_compilable();
685 }
686 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); }
687 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); }
688 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); }
689 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); }
690 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); }
692 // Background compilation support
693 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); }
694 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); }
695 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); }
697 // Resolve all classes in signature, return 'true' if successful
698 static bool load_signature_classes(methodHandle m, TRAPS);
700 // Return if true if not all classes references in signature, including return type, has been loaded
701 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS);
703 // Printing
704 void print_short_name(outputStream* st = tty) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM
705 void print_name(outputStream* st = tty) PRODUCT_RETURN; // prints as "virtual void foo(int)"
707 // Helper routine used for method sorting
708 static void sort_methods(objArrayOop methods,
709 objArrayOop methods_annotations,
710 objArrayOop methods_parameter_annotations,
711 objArrayOop methods_default_annotations,
712 bool idempotent = false);
714 // size of parameters
715 void set_size_of_parameters(int size) { _size_of_parameters = size; }
716 private:
718 // Inlined elements
719 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); }
720 address* signature_handler_addr() const { return native_function_addr() + 1; }
722 // Garbage collection support
723 oop* adr_constMethod() const { return (oop*)&_constMethod; }
724 oop* adr_method_data() const { return (oop*)&_method_data; }
725 };
728 // Utility class for compressing line number tables
730 class CompressedLineNumberWriteStream: public CompressedWriteStream {
731 private:
732 int _bci;
733 int _line;
734 public:
735 // Constructor
736 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {}
737 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {}
739 // Write (bci, line number) pair to stream
740 void write_pair_regular(int bci_delta, int line_delta);
742 inline void write_pair_inline(int bci, int line) {
743 int bci_delta = bci - _bci;
744 int line_delta = line - _line;
745 _bci = bci;
746 _line = line;
747 // Skip (0,0) deltas - they do not add information and conflict with terminator.
748 if (bci_delta == 0 && line_delta == 0) return;
749 // Check if bci is 5-bit and line number 3-bit unsigned.
750 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
751 // Compress into single byte.
752 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;
753 // Check that value doesn't match escape character.
754 if (value != 0xFF) {
755 write_byte(value);
756 return;
757 }
758 }
759 write_pair_regular(bci_delta, line_delta);
760 }
762 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair.
763 // Disabling optimization doesn't work for methods in header files
764 // so we force it to call through the non-optimized version in the .cpp.
765 // It's gross, but it's the only way we can ensure that all callers are
766 // fixed. _MSC_VER is defined by the windows compiler
767 #if defined(_M_AMD64) && _MSC_VER >= 1400
768 void write_pair(int bci, int line);
769 #else
770 void write_pair(int bci, int line) { write_pair_inline(bci, line); }
771 #endif
773 // Write end-of-stream marker
774 void write_terminator() { write_byte(0); }
775 };
778 // Utility class for decompressing line number tables
780 class CompressedLineNumberReadStream: public CompressedReadStream {
781 private:
782 int _bci;
783 int _line;
784 public:
785 // Constructor
786 CompressedLineNumberReadStream(u_char* buffer);
787 // Read (bci, line number) pair from stream. Returns false at end-of-stream.
788 bool read_pair();
789 // Accessing bci and line number (after calling read_pair)
790 int bci() const { return _bci; }
791 int line() const { return _line; }
792 };
795 /// Fast Breakpoints.
797 // If this structure gets more complicated (because bpts get numerous),
798 // move it into its own header.
800 // There is presently no provision for concurrent access
801 // to breakpoint lists, which is only OK for JVMTI because
802 // breakpoints are written only at safepoints, and are read
803 // concurrently only outside of safepoints.
805 class BreakpointInfo : public CHeapObj<mtClass> {
806 friend class VMStructs;
807 private:
808 Bytecodes::Code _orig_bytecode;
809 int _bci;
810 u2 _name_index; // of method
811 u2 _signature_index; // of method
812 BreakpointInfo* _next; // simple storage allocation
814 public:
815 BreakpointInfo(methodOop m, int bci);
817 // accessors
818 Bytecodes::Code orig_bytecode() { return _orig_bytecode; }
819 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; }
820 int bci() { return _bci; }
822 BreakpointInfo* next() const { return _next; }
823 void set_next(BreakpointInfo* n) { _next = n; }
825 // helps for searchers
826 bool match(const methodOopDesc* m, int bci) {
827 return bci == _bci && match(m);
828 }
830 bool match(const methodOopDesc* m) {
831 return _name_index == m->name_index() &&
832 _signature_index == m->signature_index();
833 }
835 void set(methodOop method);
836 void clear(methodOop method);
837 };
839 // Utility class for access exception handlers
840 class ExceptionTable : public StackObj {
841 private:
842 ExceptionTableElement* _table;
843 u2 _length;
845 public:
846 ExceptionTable(methodOop m) {
847 if (m->has_exception_handler()) {
848 _table = m->exception_table_start();
849 _length = m->exception_table_length();
850 } else {
851 _table = NULL;
852 _length = 0;
853 }
854 }
856 int length() const {
857 return _length;
858 }
860 u2 start_pc(int idx) const {
861 assert(idx < _length, "out of bounds");
862 return _table[idx].start_pc;
863 }
865 void set_start_pc(int idx, u2 value) {
866 assert(idx < _length, "out of bounds");
867 _table[idx].start_pc = value;
868 }
870 u2 end_pc(int idx) const {
871 assert(idx < _length, "out of bounds");
872 return _table[idx].end_pc;
873 }
875 void set_end_pc(int idx, u2 value) {
876 assert(idx < _length, "out of bounds");
877 _table[idx].end_pc = value;
878 }
880 u2 handler_pc(int idx) const {
881 assert(idx < _length, "out of bounds");
882 return _table[idx].handler_pc;
883 }
885 void set_handler_pc(int idx, u2 value) {
886 assert(idx < _length, "out of bounds");
887 _table[idx].handler_pc = value;
888 }
890 u2 catch_type_index(int idx) const {
891 assert(idx < _length, "out of bounds");
892 return _table[idx].catch_type_index;
893 }
895 void set_catch_type_index(int idx, u2 value) {
896 assert(idx < _length, "out of bounds");
897 _table[idx].catch_type_index = value;
898 }
899 };
901 #endif // SHARE_VM_OOPS_METHODOOP_HPP