Wed, 11 Jan 2012 17:34:02 -0500
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
Summary: Added a nop tracing infrastructure, JFR makefile changes and other infrastructure used only by JFR.
Reviewed-by: acorn, sspitsyn
Contributed-by: markus.gronlund@oracle.com
1 /*
2 * Copyright (c) 1997, 2011, 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 // | constants (oop) |
68 // |------------------------------------------------------|
69 // | methodData (oop) |
70 // | interp_invocation_count |
71 // |------------------------------------------------------|
72 // | access_flags |
73 // | vtable_index |
74 // |------------------------------------------------------|
75 // | result_index (C++ interpreter only) |
76 // |------------------------------------------------------|
77 // | method_size | max_stack |
78 // | max_locals | size_of_parameters |
79 // |------------------------------------------------------|
80 // |intrinsic_id| flags | throwout_count |
81 // |------------------------------------------------------|
82 // | num_breakpoints | (unused) |
83 // |------------------------------------------------------|
84 // | invocation_counter |
85 // | backedge_counter |
86 // |------------------------------------------------------|
87 // | prev_time (tiered only, 64 bit wide) |
88 // | |
89 // |------------------------------------------------------|
90 // | rate (tiered) |
91 // |------------------------------------------------------|
92 // | code (pointer) |
93 // | i2i (pointer) |
94 // | adapter (pointer) |
95 // | from_compiled_entry (pointer) |
96 // | from_interpreted_entry (pointer) |
97 // |------------------------------------------------------|
98 // | native_function (present only if native) |
99 // | signature_handler (present only if native) |
100 // |------------------------------------------------------|
103 class CheckedExceptionElement;
104 class LocalVariableTableElement;
105 class AdapterHandlerEntry;
106 class methodDataOopDesc;
108 class methodOopDesc : public oopDesc {
109 friend class methodKlass;
110 friend class VMStructs;
111 private:
112 constMethodOop _constMethod; // Method read-only data.
113 constantPoolOop _constants; // Constant pool
114 methodDataOop _method_data;
115 int _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered)
116 AccessFlags _access_flags; // Access flags
117 int _vtable_index; // vtable index of this method (see VtableIndexFlag)
118 // note: can have vtables with >2**16 elements (because of inheritance)
119 #ifdef CC_INTERP
120 int _result_index; // C++ interpreter needs for converting results to/from stack
121 #endif
122 u2 _method_size; // size of this object
123 u2 _max_stack; // Maximum number of entries on the expression stack
124 u2 _max_locals; // Number of local variables used by this method
125 u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words
126 u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none)
127 u1 _jfr_towrite : 1, // Flags
128 : 7;
129 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
130 u2 _number_of_breakpoints; // fullspeed debugging support
131 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations
132 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations
134 #ifdef TIERED
135 jlong _prev_time; // Previous time the rate was acquired
136 float _rate; // Events (invocation and backedge counter increments) per millisecond
137 #endif
139 #ifndef PRODUCT
140 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging)
141 #endif
142 // Entry point for calling both from and to the interpreter.
143 address _i2i_entry; // All-args-on-stack calling convention
144 // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked.
145 AdapterHandlerEntry* _adapter;
146 // Entry point for calling from compiled code, to compiled code if it exists
147 // or else the interpreter.
148 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry()
149 // The entry point for calling both from and to compiled code is
150 // "_code->entry_point()". Because of tiered compilation and de-opt, this
151 // field can come and go. It can transition from NULL to not-null at any
152 // time (whenever a compile completes). It can transition from not-null to
153 // NULL only at safepoints (because of a de-opt).
154 nmethod* volatile _code; // Points to the corresponding piece of native code
155 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry
157 public:
159 // accessors for instance variables
160 constMethodOop constMethod() const { return _constMethod; }
161 void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); }
164 static address make_adapters(methodHandle mh, TRAPS);
165 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); }
166 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); }
168 // access flag
169 AccessFlags access_flags() const { return _access_flags; }
170 void set_access_flags(AccessFlags flags) { _access_flags = flags; }
172 // name
173 Symbol* name() const { return _constants->symbol_at(name_index()); }
174 int name_index() const { return constMethod()->name_index(); }
175 void set_name_index(int index) { constMethod()->set_name_index(index); }
177 // signature
178 Symbol* signature() const { return _constants->symbol_at(signature_index()); }
179 int signature_index() const { return constMethod()->signature_index(); }
180 void set_signature_index(int index) { constMethod()->set_signature_index(index); }
182 // generics support
183 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (Symbol*)NULL); }
184 int generic_signature_index() const { return constMethod()->generic_signature_index(); }
185 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); }
187 // annotations support
188 typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); }
189 typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); }
190 typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); }
192 #ifdef CC_INTERP
193 void set_result_index(BasicType type);
194 int result_index() { return _result_index; }
195 #endif
197 // Helper routine: get klass name + "." + method name + signature as
198 // C string, for the purpose of providing more useful NoSuchMethodErrors
199 // and fatal error handling. The string is allocated in resource
200 // area if a buffer is not provided by the caller.
201 char* name_and_sig_as_C_string();
202 char* name_and_sig_as_C_string(char* buf, int size);
204 // Static routine in the situations we don't have a methodOop
205 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature);
206 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size);
208 Bytecodes::Code java_code_at(int bci) const {
209 return Bytecodes::java_code_at(this, bcp_from(bci));
210 }
211 Bytecodes::Code code_at(int bci) const {
212 return Bytecodes::code_at(this, bcp_from(bci));
213 }
215 // JVMTI breakpoints
216 Bytecodes::Code orig_bytecode_at(int bci) const;
217 void set_orig_bytecode_at(int bci, Bytecodes::Code code);
218 void set_breakpoint(int bci);
219 void clear_breakpoint(int bci);
220 void clear_all_breakpoints();
221 // Tracking number of breakpoints, for fullspeed debugging.
222 // Only mutated by VM thread.
223 u2 number_of_breakpoints() const { return _number_of_breakpoints; }
224 void incr_number_of_breakpoints() { ++_number_of_breakpoints; }
225 void decr_number_of_breakpoints() { --_number_of_breakpoints; }
226 // Initialization only
227 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; }
229 // index into instanceKlass methods() array
230 // note: also used by jfr
231 u2 method_idnum() const { return constMethod()->method_idnum(); }
232 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); }
234 // code size
235 int code_size() const { return constMethod()->code_size(); }
237 // method size
238 int method_size() const { return _method_size; }
239 void set_method_size(int size) {
240 assert(0 <= size && size < (1 << 16), "invalid method size");
241 _method_size = size;
242 }
244 // constant pool for klassOop holding this method
245 constantPoolOop constants() const { return _constants; }
246 void set_constants(constantPoolOop c) { oop_store_without_check((oop*)&_constants, c); }
248 // max stack
249 int max_stack() const { return _max_stack; }
250 void set_max_stack(int size) { _max_stack = size; }
252 // max locals
253 int max_locals() const { return _max_locals; }
254 void set_max_locals(int size) { _max_locals = size; }
256 int highest_comp_level() const;
257 void set_highest_comp_level(int level);
258 int highest_osr_comp_level() const;
259 void set_highest_osr_comp_level(int level);
261 // Count of times method was exited via exception while interpreting
262 void interpreter_throwout_increment() {
263 if (_interpreter_throwout_count < 65534) {
264 _interpreter_throwout_count++;
265 }
266 }
268 int interpreter_throwout_count() const { return _interpreter_throwout_count; }
269 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; }
271 // size of parameters
272 int size_of_parameters() const { return _size_of_parameters; }
274 bool has_stackmap_table() const {
275 return constMethod()->has_stackmap_table();
276 }
278 typeArrayOop stackmap_data() const {
279 return constMethod()->stackmap_data();
280 }
282 void set_stackmap_data(typeArrayOop sd) {
283 constMethod()->set_stackmap_data(sd);
284 }
286 // exception handler table
287 typeArrayOop exception_table() const
288 { return constMethod()->exception_table(); }
289 void set_exception_table(typeArrayOop e)
290 { constMethod()->set_exception_table(e); }
291 bool has_exception_handler() const
292 { return constMethod()->has_exception_handler(); }
294 // Finds the first entry point bci of an exception handler for an
295 // exception of klass ex_klass thrown at throw_bci. A value of NULL
296 // for ex_klass indicates that the exception klass is not known; in
297 // this case it matches any constraint class. Returns -1 if the
298 // exception cannot be handled in this method. The handler
299 // constraint classes are loaded if necessary. Note that this may
300 // throw an exception if loading of the constraint classes causes
301 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError.
302 // If an exception is thrown, returns the bci of the
303 // exception handler which caused the exception to be thrown, which
304 // is needed for proper retries. See, for example,
305 // InterpreterRuntime::exception_handler_for_exception.
306 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS);
308 // method data access
309 methodDataOop method_data() const {
310 return _method_data;
311 }
312 void set_method_data(methodDataOop data) {
313 oop_store_without_check((oop*)&_method_data, (oop)data);
314 }
316 // invocation counter
317 InvocationCounter* invocation_counter() { return &_invocation_counter; }
318 InvocationCounter* backedge_counter() { return &_backedge_counter; }
320 #ifdef TIERED
321 // We are reusing interpreter_invocation_count as a holder for the previous event count!
322 // We can do that since interpreter_invocation_count is not used in tiered.
323 int prev_event_count() const { return _interpreter_invocation_count; }
324 void set_prev_event_count(int count) { _interpreter_invocation_count = count; }
325 jlong prev_time() const { return _prev_time; }
326 void set_prev_time(jlong time) { _prev_time = time; }
327 float rate() const { return _rate; }
328 void set_rate(float rate) { _rate = rate; }
329 #endif
331 int invocation_count();
332 int backedge_count();
334 bool was_executed_more_than(int n);
335 bool was_never_executed() { return !was_executed_more_than(0); }
337 static void build_interpreter_method_data(methodHandle method, TRAPS);
339 int interpreter_invocation_count() {
340 if (TieredCompilation) return invocation_count();
341 else return _interpreter_invocation_count;
342 }
343 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; }
344 int increment_interpreter_invocation_count() {
345 if (TieredCompilation) ShouldNotReachHere();
346 return ++_interpreter_invocation_count;
347 }
349 #ifndef PRODUCT
350 int compiled_invocation_count() const { return _compiled_invocation_count; }
351 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; }
352 #endif // not PRODUCT
354 // Clear (non-shared space) pointers which could not be relevant
355 // if this (shared) method were mapped into another JVM.
356 void remove_unshareable_info();
358 // nmethod/verified compiler entry
359 address verified_code_entry();
360 bool check_code() const; // Not inline to avoid circular ref
361 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); }
362 void clear_code(); // Clear out any compiled code
363 static void set_code(methodHandle mh, nmethod* code);
364 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; }
365 address get_i2c_entry();
366 address get_c2i_entry();
367 address get_c2i_unverified_entry();
368 AdapterHandlerEntry* adapter() { return _adapter; }
369 // setup entry points
370 void link_method(methodHandle method, TRAPS);
371 // clear entry points. Used by sharing code
372 void unlink_method();
374 // vtable index
375 enum VtableIndexFlag {
376 // Valid vtable indexes are non-negative (>= 0).
377 // These few negative values are used as sentinels.
378 highest_unused_vtable_index_value = -5,
379 invalid_vtable_index = -4, // distinct from any valid vtable index
380 garbage_vtable_index = -3, // not yet linked; no vtable layout yet
381 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch
382 // 6330203 Note: Do not use -1, which was overloaded with many meanings.
383 };
384 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; })
385 int vtable_index() const { assert(valid_vtable_index(), "");
386 return _vtable_index; }
387 void set_vtable_index(int index) { _vtable_index = index; }
389 // interpreter entry
390 address interpreter_entry() const { return _i2i_entry; }
391 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry
392 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; }
393 int interpreter_kind(void) {
394 return constMethod()->interpreter_kind();
395 }
396 void set_interpreter_kind();
397 void set_interpreter_kind(int kind) {
398 constMethod()->set_interpreter_kind(kind);
399 }
401 // native function (used for native methods only)
402 enum {
403 native_bind_event_is_interesting = true
404 };
405 address native_function() const { return *(native_function_addr()); }
406 // Must specify a real function (not NULL).
407 // Use clear_native_function() to unregister.
408 void set_native_function(address function, bool post_event_flag);
409 bool has_native_function() const;
410 void clear_native_function();
412 // signature handler (used for native methods only)
413 address signature_handler() const { return *(signature_handler_addr()); }
414 void set_signature_handler(address handler);
416 // Interpreter oopmap support
417 void mask_for(int bci, InterpreterOopMap* mask);
419 #ifndef PRODUCT
420 // operations on invocation counter
421 void print_invocation_count();
422 #endif
424 // byte codes
425 void set_code(address code) { return constMethod()->set_code(code); }
426 address code_base() const { return constMethod()->code_base(); }
427 bool contains(address bcp) const { return constMethod()->contains(bcp); }
429 // prints byte codes
430 void print_codes() const { print_codes_on(tty); }
431 void print_codes_on(outputStream* st) const PRODUCT_RETURN;
432 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN;
434 // checked exceptions
435 int checked_exceptions_length() const
436 { return constMethod()->checked_exceptions_length(); }
437 CheckedExceptionElement* checked_exceptions_start() const
438 { return constMethod()->checked_exceptions_start(); }
440 // localvariable table
441 bool has_localvariable_table() const
442 { return constMethod()->has_localvariable_table(); }
443 int localvariable_table_length() const
444 { return constMethod()->localvariable_table_length(); }
445 LocalVariableTableElement* localvariable_table_start() const
446 { return constMethod()->localvariable_table_start(); }
448 bool has_linenumber_table() const
449 { return constMethod()->has_linenumber_table(); }
450 u_char* compressed_linenumber_table() const
451 { return constMethod()->compressed_linenumber_table(); }
453 // method holder (the klassOop holding this method)
454 klassOop method_holder() const { return _constants->pool_holder(); }
456 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments)
457 Symbol* klass_name() const; // returns the name of the method holder
458 BasicType result_type() const; // type of the method result
459 int result_type_index() const; // type index of the method result
460 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); }
461 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); }
463 // Checked exceptions thrown by this method (resolved to mirrors)
464 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); }
466 // Access flags
467 bool is_public() const { return access_flags().is_public(); }
468 bool is_private() const { return access_flags().is_private(); }
469 bool is_protected() const { return access_flags().is_protected(); }
470 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
471 bool is_static() const { return access_flags().is_static(); }
472 bool is_final() const { return access_flags().is_final(); }
473 bool is_synchronized() const { return access_flags().is_synchronized();}
474 bool is_native() const { return access_flags().is_native(); }
475 bool is_abstract() const { return access_flags().is_abstract(); }
476 bool is_strict() const { return access_flags().is_strict(); }
477 bool is_synthetic() const { return access_flags().is_synthetic(); }
479 // returns true if contains only return operation
480 bool is_empty_method() const;
482 // returns true if this is a vanilla constructor
483 bool is_vanilla_constructor() const;
485 // checks method and its method holder
486 bool is_final_method() const;
487 bool is_strict_method() const;
489 // true if method needs no dynamic dispatch (final and/or no vtable entry)
490 bool can_be_statically_bound() const;
492 // returns true if the method has any backward branches.
493 bool has_loops() {
494 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag();
495 };
497 bool compute_has_loops_flag();
499 bool has_jsrs() {
500 return access_flags().has_jsrs();
501 };
502 void set_has_jsrs() {
503 _access_flags.set_has_jsrs();
504 }
506 // returns true if the method has any monitors.
507 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); }
508 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); }
510 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); }
512 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes
513 // propererly nest in the method. It might return false, even though they actually nest properly, since the info.
514 // has not been computed yet.
515 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); }
516 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); }
518 // returns true if the method is an accessor function (setter/getter).
519 bool is_accessor() const;
521 // returns true if the method is an initializer (<init> or <clinit>).
522 bool is_initializer() const;
524 // returns true if the method is static OR if the classfile version < 51
525 bool has_valid_initializer_flags() const;
527 // returns true if the method name is <clinit> and the method has
528 // valid static initializer flags.
529 bool is_static_initializer() const;
531 // compiled code support
532 // NOTE: code() is inherently racy as deopt can be clearing code
533 // simultaneously. Use with caution.
534 bool has_compiled_code() const { return code() != NULL; }
536 // sizing
537 static int object_size(bool is_native);
538 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; }
539 int object_size() const { return method_size(); }
541 bool object_is_parsable() const { return method_size() > 0; }
543 // interpreter support
544 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); }
545 static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); }
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 // 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) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM
705 void print_name(outputStream* st) 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_constants() const { return (oop*)&_constants; }
725 oop* adr_method_data() const { return (oop*)&_method_data; }
726 };
729 // Utility class for compressing line number tables
731 class CompressedLineNumberWriteStream: public CompressedWriteStream {
732 private:
733 int _bci;
734 int _line;
735 public:
736 // Constructor
737 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {}
738 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {}
740 // Write (bci, line number) pair to stream
741 void write_pair_regular(int bci_delta, int line_delta);
743 inline void write_pair_inline(int bci, int line) {
744 int bci_delta = bci - _bci;
745 int line_delta = line - _line;
746 _bci = bci;
747 _line = line;
748 // Skip (0,0) deltas - they do not add information and conflict with terminator.
749 if (bci_delta == 0 && line_delta == 0) return;
750 // Check if bci is 5-bit and line number 3-bit unsigned.
751 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
752 // Compress into single byte.
753 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;
754 // Check that value doesn't match escape character.
755 if (value != 0xFF) {
756 write_byte(value);
757 return;
758 }
759 }
760 write_pair_regular(bci_delta, line_delta);
761 }
763 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair.
764 // Disabling optimization doesn't work for methods in header files
765 // so we force it to call through the non-optimized version in the .cpp.
766 // It's gross, but it's the only way we can ensure that all callers are
767 // fixed. _MSC_VER is defined by the windows compiler
768 #if defined(_M_AMD64) && _MSC_VER >= 1400
769 void write_pair(int bci, int line);
770 #else
771 void write_pair(int bci, int line) { write_pair_inline(bci, line); }
772 #endif
774 // Write end-of-stream marker
775 void write_terminator() { write_byte(0); }
776 };
779 // Utility class for decompressing line number tables
781 class CompressedLineNumberReadStream: public CompressedReadStream {
782 private:
783 int _bci;
784 int _line;
785 public:
786 // Constructor
787 CompressedLineNumberReadStream(u_char* buffer);
788 // Read (bci, line number) pair from stream. Returns false at end-of-stream.
789 bool read_pair();
790 // Accessing bci and line number (after calling read_pair)
791 int bci() const { return _bci; }
792 int line() const { return _line; }
793 };
796 /// Fast Breakpoints.
798 // If this structure gets more complicated (because bpts get numerous),
799 // move it into its own header.
801 // There is presently no provision for concurrent access
802 // to breakpoint lists, which is only OK for JVMTI because
803 // breakpoints are written only at safepoints, and are read
804 // concurrently only outside of safepoints.
806 class BreakpointInfo : public CHeapObj {
807 friend class VMStructs;
808 private:
809 Bytecodes::Code _orig_bytecode;
810 int _bci;
811 u2 _name_index; // of method
812 u2 _signature_index; // of method
813 BreakpointInfo* _next; // simple storage allocation
815 public:
816 BreakpointInfo(methodOop m, int bci);
818 // accessors
819 Bytecodes::Code orig_bytecode() { return _orig_bytecode; }
820 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; }
821 int bci() { return _bci; }
823 BreakpointInfo* next() const { return _next; }
824 void set_next(BreakpointInfo* n) { _next = n; }
826 // helps for searchers
827 bool match(const methodOopDesc* m, int bci) {
828 return bci == _bci && match(m);
829 }
831 bool match(const methodOopDesc* m) {
832 return _name_index == m->name_index() &&
833 _signature_index == m->signature_index();
834 }
836 void set(methodOop method);
837 void clear(methodOop method);
838 };
840 #endif // SHARE_VM_OOPS_METHODOOP_HPP