Mon, 11 Feb 2013 14:06:22 -0500
8007320: NPG: move method annotations
Summary: allocate method annotations and attach to ConstMethod if present
Reviewed-by: dcubed, jiangli, sspitsyn, iklam
1 /*
2 * Copyright (c) 1997, 2013, 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 #include "precompiled.hpp"
26 #include "classfile/metadataOnStackMark.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "code/debugInfoRec.hpp"
29 #include "gc_interface/collectedHeap.inline.hpp"
30 #include "interpreter/bytecodeStream.hpp"
31 #include "interpreter/bytecodeTracer.hpp"
32 #include "interpreter/bytecodes.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "interpreter/oopMapCache.hpp"
35 #include "memory/gcLocker.hpp"
36 #include "memory/generation.hpp"
37 #include "memory/heapInspection.hpp"
38 #include "memory/metadataFactory.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "oops/constMethod.hpp"
41 #include "oops/methodData.hpp"
42 #include "oops/method.hpp"
43 #include "oops/oop.inline.hpp"
44 #include "oops/symbol.hpp"
45 #include "prims/jvmtiExport.hpp"
46 #include "prims/methodHandles.hpp"
47 #include "prims/nativeLookup.hpp"
48 #include "runtime/arguments.hpp"
49 #include "runtime/compilationPolicy.hpp"
50 #include "runtime/frame.inline.hpp"
51 #include "runtime/handles.inline.hpp"
52 #include "runtime/relocator.hpp"
53 #include "runtime/sharedRuntime.hpp"
54 #include "runtime/signature.hpp"
55 #include "utilities/quickSort.hpp"
56 #include "utilities/xmlstream.hpp"
59 // Implementation of Method
61 Method* Method::allocate(ClassLoaderData* loader_data,
62 int byte_code_size,
63 AccessFlags access_flags,
64 InlineTableSizes* sizes,
65 ConstMethod::MethodType method_type,
66 TRAPS) {
67 assert(!access_flags.is_native() || byte_code_size == 0,
68 "native methods should not contain byte codes");
69 ConstMethod* cm = ConstMethod::allocate(loader_data,
70 byte_code_size,
71 sizes,
72 method_type,
73 CHECK_NULL);
75 int size = Method::size(access_flags.is_native());
77 return new (loader_data, size, false, THREAD) Method(cm, access_flags, size);
78 }
80 Method::Method(ConstMethod* xconst,
81 AccessFlags access_flags, int size) {
82 No_Safepoint_Verifier no_safepoint;
83 set_constMethod(xconst);
84 set_access_flags(access_flags);
85 set_method_size(size);
86 set_name_index(0);
87 set_signature_index(0);
88 #ifdef CC_INTERP
89 set_result_index(T_VOID);
90 #endif
91 set_constants(NULL);
92 set_max_stack(0);
93 set_max_locals(0);
94 set_intrinsic_id(vmIntrinsics::_none);
95 set_jfr_towrite(false);
96 set_method_data(NULL);
97 set_interpreter_throwout_count(0);
98 set_vtable_index(Method::garbage_vtable_index);
100 // Fix and bury in Method*
101 set_interpreter_entry(NULL); // sets i2i entry and from_int
102 set_adapter_entry(NULL);
103 clear_code(); // from_c/from_i get set to c2i/i2i
105 if (access_flags.is_native()) {
106 clear_native_function();
107 set_signature_handler(NULL);
108 }
110 NOT_PRODUCT(set_compiled_invocation_count(0);)
111 set_interpreter_invocation_count(0);
112 invocation_counter()->init();
113 backedge_counter()->init();
114 clear_number_of_breakpoints();
116 #ifdef TIERED
117 set_rate(0);
118 set_prev_event_count(0);
119 set_prev_time(0);
120 #endif
121 }
123 // Release Method*. The nmethod will be gone when we get here because
124 // we've walked the code cache.
125 void Method::deallocate_contents(ClassLoaderData* loader_data) {
126 MetadataFactory::free_metadata(loader_data, constMethod());
127 set_constMethod(NULL);
128 MetadataFactory::free_metadata(loader_data, method_data());
129 set_method_data(NULL);
130 // The nmethod will be gone when we get here.
131 if (code() != NULL) _code = NULL;
132 }
134 address Method::get_i2c_entry() {
135 assert(_adapter != NULL, "must have");
136 return _adapter->get_i2c_entry();
137 }
139 address Method::get_c2i_entry() {
140 assert(_adapter != NULL, "must have");
141 return _adapter->get_c2i_entry();
142 }
144 address Method::get_c2i_unverified_entry() {
145 assert(_adapter != NULL, "must have");
146 return _adapter->get_c2i_unverified_entry();
147 }
149 char* Method::name_and_sig_as_C_string() const {
150 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature());
151 }
153 char* Method::name_and_sig_as_C_string(char* buf, int size) const {
154 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature(), buf, size);
155 }
157 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature) {
158 const char* klass_name = klass->external_name();
159 int klass_name_len = (int)strlen(klass_name);
160 int method_name_len = method_name->utf8_length();
161 int len = klass_name_len + 1 + method_name_len + signature->utf8_length();
162 char* dest = NEW_RESOURCE_ARRAY(char, len + 1);
163 strcpy(dest, klass_name);
164 dest[klass_name_len] = '.';
165 strcpy(&dest[klass_name_len + 1], method_name->as_C_string());
166 strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string());
167 dest[len] = 0;
168 return dest;
169 }
171 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size) {
172 Symbol* klass_name = klass->name();
173 klass_name->as_klass_external_name(buf, size);
174 int len = (int)strlen(buf);
176 if (len < size - 1) {
177 buf[len++] = '.';
179 method_name->as_C_string(&(buf[len]), size - len);
180 len = (int)strlen(buf);
182 signature->as_C_string(&(buf[len]), size - len);
183 }
185 return buf;
186 }
188 int Method::fast_exception_handler_bci_for(methodHandle mh, KlassHandle ex_klass, int throw_bci, TRAPS) {
189 // exception table holds quadruple entries of the form (beg_bci, end_bci, handler_bci, klass_index)
190 // access exception table
191 ExceptionTable table(mh());
192 int length = table.length();
193 // iterate through all entries sequentially
194 constantPoolHandle pool(THREAD, mh->constants());
195 for (int i = 0; i < length; i ++) {
196 //reacquire the table in case a GC happened
197 ExceptionTable table(mh());
198 int beg_bci = table.start_pc(i);
199 int end_bci = table.end_pc(i);
200 assert(beg_bci <= end_bci, "inconsistent exception table");
201 if (beg_bci <= throw_bci && throw_bci < end_bci) {
202 // exception handler bci range covers throw_bci => investigate further
203 int handler_bci = table.handler_pc(i);
204 int klass_index = table.catch_type_index(i);
205 if (klass_index == 0) {
206 return handler_bci;
207 } else if (ex_klass.is_null()) {
208 return handler_bci;
209 } else {
210 // we know the exception class => get the constraint class
211 // this may require loading of the constraint class; if verification
212 // fails or some other exception occurs, return handler_bci
213 Klass* k = pool->klass_at(klass_index, CHECK_(handler_bci));
214 KlassHandle klass = KlassHandle(THREAD, k);
215 assert(klass.not_null(), "klass not loaded");
216 if (ex_klass->is_subtype_of(klass())) {
217 return handler_bci;
218 }
219 }
220 }
221 }
223 return -1;
224 }
226 void Method::mask_for(int bci, InterpreterOopMap* mask) {
228 Thread* myThread = Thread::current();
229 methodHandle h_this(myThread, this);
230 #ifdef ASSERT
231 bool has_capability = myThread->is_VM_thread() ||
232 myThread->is_ConcurrentGC_thread() ||
233 myThread->is_GC_task_thread();
235 if (!has_capability) {
236 if (!VerifyStack && !VerifyLastFrame) {
237 // verify stack calls this outside VM thread
238 warning("oopmap should only be accessed by the "
239 "VM, GC task or CMS threads (or during debugging)");
240 InterpreterOopMap local_mask;
241 method_holder()->mask_for(h_this, bci, &local_mask);
242 local_mask.print();
243 }
244 }
245 #endif
246 method_holder()->mask_for(h_this, bci, mask);
247 return;
248 }
251 int Method::bci_from(address bcp) const {
252 #ifdef ASSERT
253 { ResourceMark rm;
254 assert(is_native() && bcp == code_base() || contains(bcp) || is_error_reported(),
255 err_msg("bcp doesn't belong to this method: bcp: " INTPTR_FORMAT ", method: %s", bcp, name_and_sig_as_C_string()));
256 }
257 #endif
258 return bcp - code_base();
259 }
262 // Return (int)bcx if it appears to be a valid BCI.
263 // Return bci_from((address)bcx) if it appears to be a valid BCP.
264 // Return -1 otherwise.
265 // Used by profiling code, when invalid data is a possibility.
266 // The caller is responsible for validating the Method* itself.
267 int Method::validate_bci_from_bcx(intptr_t bcx) const {
268 // keep bci as -1 if not a valid bci
269 int bci = -1;
270 if (bcx == 0 || (address)bcx == code_base()) {
271 // code_size() may return 0 and we allow 0 here
272 // the method may be native
273 bci = 0;
274 } else if (frame::is_bci(bcx)) {
275 if (bcx < code_size()) {
276 bci = (int)bcx;
277 }
278 } else if (contains((address)bcx)) {
279 bci = (address)bcx - code_base();
280 }
281 // Assert that if we have dodged any asserts, bci is negative.
282 assert(bci == -1 || bci == bci_from(bcp_from(bci)), "sane bci if >=0");
283 return bci;
284 }
286 address Method::bcp_from(int bci) const {
287 assert((is_native() && bci == 0) || (!is_native() && 0 <= bci && bci < code_size()), "illegal bci");
288 address bcp = code_base() + bci;
289 assert(is_native() && bcp == code_base() || contains(bcp), "bcp doesn't belong to this method");
290 return bcp;
291 }
294 int Method::size(bool is_native) {
295 // If native, then include pointers for native_function and signature_handler
296 int extra_bytes = (is_native) ? 2*sizeof(address*) : 0;
297 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord;
298 return align_object_size(header_size() + extra_words);
299 }
302 Symbol* Method::klass_name() const {
303 Klass* k = method_holder();
304 assert(k->is_klass(), "must be klass");
305 InstanceKlass* ik = (InstanceKlass*) k;
306 return ik->name();
307 }
310 // Attempt to return method oop to original state. Clear any pointers
311 // (to objects outside the shared spaces). We won't be able to predict
312 // where they should point in a new JVM. Further initialize some
313 // entries now in order allow them to be write protected later.
315 void Method::remove_unshareable_info() {
316 unlink_method();
317 }
320 bool Method::was_executed_more_than(int n) {
321 // Invocation counter is reset when the Method* is compiled.
322 // If the method has compiled code we therefore assume it has
323 // be excuted more than n times.
324 if (is_accessor() || is_empty_method() || (code() != NULL)) {
325 // interpreter doesn't bump invocation counter of trivial methods
326 // compiler does not bump invocation counter of compiled methods
327 return true;
328 }
329 else if (_invocation_counter.carry() || (method_data() != NULL && method_data()->invocation_counter()->carry())) {
330 // The carry bit is set when the counter overflows and causes
331 // a compilation to occur. We don't know how many times
332 // the counter has been reset, so we simply assume it has
333 // been executed more than n times.
334 return true;
335 } else {
336 return invocation_count() > n;
337 }
338 }
340 #ifndef PRODUCT
341 void Method::print_invocation_count() {
342 if (is_static()) tty->print("static ");
343 if (is_final()) tty->print("final ");
344 if (is_synchronized()) tty->print("synchronized ");
345 if (is_native()) tty->print("native ");
346 method_holder()->name()->print_symbol_on(tty);
347 tty->print(".");
348 name()->print_symbol_on(tty);
349 signature()->print_symbol_on(tty);
351 if (WizardMode) {
352 // dump the size of the byte codes
353 tty->print(" {%d}", code_size());
354 }
355 tty->cr();
357 tty->print_cr (" interpreter_invocation_count: %8d ", interpreter_invocation_count());
358 tty->print_cr (" invocation_counter: %8d ", invocation_count());
359 tty->print_cr (" backedge_counter: %8d ", backedge_count());
360 if (CountCompiledCalls) {
361 tty->print_cr (" compiled_invocation_count: %8d ", compiled_invocation_count());
362 }
364 }
365 #endif
367 // Build a MethodData* object to hold information about this method
368 // collected in the interpreter.
369 void Method::build_interpreter_method_data(methodHandle method, TRAPS) {
370 // Do not profile method if current thread holds the pending list lock,
371 // which avoids deadlock for acquiring the MethodData_lock.
372 if (InstanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) {
373 return;
374 }
376 // Grab a lock here to prevent multiple
377 // MethodData*s from being created.
378 MutexLocker ml(MethodData_lock, THREAD);
379 if (method->method_data() == NULL) {
380 ClassLoaderData* loader_data = method->method_holder()->class_loader_data();
381 MethodData* method_data = MethodData::allocate(loader_data, method, CHECK);
382 method->set_method_data(method_data);
383 if (PrintMethodData && (Verbose || WizardMode)) {
384 ResourceMark rm(THREAD);
385 tty->print("build_interpreter_method_data for ");
386 method->print_name(tty);
387 tty->cr();
388 // At the end of the run, the MDO, full of data, will be dumped.
389 }
390 }
391 }
393 void Method::cleanup_inline_caches() {
394 // The current system doesn't use inline caches in the interpreter
395 // => nothing to do (keep this method around for future use)
396 }
399 int Method::extra_stack_words() {
400 // not an inline function, to avoid a header dependency on Interpreter
401 return extra_stack_entries() * Interpreter::stackElementSize;
402 }
405 void Method::compute_size_of_parameters(Thread *thread) {
406 ArgumentSizeComputer asc(signature());
407 set_size_of_parameters(asc.size() + (is_static() ? 0 : 1));
408 }
410 #ifdef CC_INTERP
411 void Method::set_result_index(BasicType type) {
412 _result_index = Interpreter::BasicType_as_index(type);
413 }
414 #endif
416 BasicType Method::result_type() const {
417 ResultTypeFinder rtf(signature());
418 return rtf.type();
419 }
422 bool Method::is_empty_method() const {
423 return code_size() == 1
424 && *code_base() == Bytecodes::_return;
425 }
428 bool Method::is_vanilla_constructor() const {
429 // Returns true if this method is a vanilla constructor, i.e. an "<init>" "()V" method
430 // which only calls the superclass vanilla constructor and possibly does stores of
431 // zero constants to local fields:
432 //
433 // aload_0
434 // invokespecial
435 // indexbyte1
436 // indexbyte2
437 //
438 // followed by an (optional) sequence of:
439 //
440 // aload_0
441 // aconst_null / iconst_0 / fconst_0 / dconst_0
442 // putfield
443 // indexbyte1
444 // indexbyte2
445 //
446 // followed by:
447 //
448 // return
450 assert(name() == vmSymbols::object_initializer_name(), "Should only be called for default constructors");
451 assert(signature() == vmSymbols::void_method_signature(), "Should only be called for default constructors");
452 int size = code_size();
453 // Check if size match
454 if (size == 0 || size % 5 != 0) return false;
455 address cb = code_base();
456 int last = size - 1;
457 if (cb[0] != Bytecodes::_aload_0 || cb[1] != Bytecodes::_invokespecial || cb[last] != Bytecodes::_return) {
458 // Does not call superclass default constructor
459 return false;
460 }
461 // Check optional sequence
462 for (int i = 4; i < last; i += 5) {
463 if (cb[i] != Bytecodes::_aload_0) return false;
464 if (!Bytecodes::is_zero_const(Bytecodes::cast(cb[i+1]))) return false;
465 if (cb[i+2] != Bytecodes::_putfield) return false;
466 }
467 return true;
468 }
471 bool Method::compute_has_loops_flag() {
472 BytecodeStream bcs(this);
473 Bytecodes::Code bc;
475 while ((bc = bcs.next()) >= 0) {
476 switch( bc ) {
477 case Bytecodes::_ifeq:
478 case Bytecodes::_ifnull:
479 case Bytecodes::_iflt:
480 case Bytecodes::_ifle:
481 case Bytecodes::_ifne:
482 case Bytecodes::_ifnonnull:
483 case Bytecodes::_ifgt:
484 case Bytecodes::_ifge:
485 case Bytecodes::_if_icmpeq:
486 case Bytecodes::_if_icmpne:
487 case Bytecodes::_if_icmplt:
488 case Bytecodes::_if_icmpgt:
489 case Bytecodes::_if_icmple:
490 case Bytecodes::_if_icmpge:
491 case Bytecodes::_if_acmpeq:
492 case Bytecodes::_if_acmpne:
493 case Bytecodes::_goto:
494 case Bytecodes::_jsr:
495 if( bcs.dest() < bcs.next_bci() ) _access_flags.set_has_loops();
496 break;
498 case Bytecodes::_goto_w:
499 case Bytecodes::_jsr_w:
500 if( bcs.dest_w() < bcs.next_bci() ) _access_flags.set_has_loops();
501 break;
502 }
503 }
504 _access_flags.set_loops_flag_init();
505 return _access_flags.has_loops();
506 }
509 bool Method::is_final_method() const {
510 // %%% Should return true for private methods also,
511 // since there is no way to override them.
512 return is_final() || method_holder()->is_final();
513 }
516 bool Method::is_strict_method() const {
517 return is_strict();
518 }
521 bool Method::can_be_statically_bound() const {
522 if (is_final_method()) return true;
523 return vtable_index() == nonvirtual_vtable_index;
524 }
527 bool Method::is_accessor() const {
528 if (code_size() != 5) return false;
529 if (size_of_parameters() != 1) return false;
530 if (java_code_at(0) != Bytecodes::_aload_0 ) return false;
531 if (java_code_at(1) != Bytecodes::_getfield) return false;
532 if (java_code_at(4) != Bytecodes::_areturn &&
533 java_code_at(4) != Bytecodes::_ireturn ) return false;
534 return true;
535 }
538 bool Method::is_initializer() const {
539 return name() == vmSymbols::object_initializer_name() || is_static_initializer();
540 }
542 bool Method::has_valid_initializer_flags() const {
543 return (is_static() ||
544 method_holder()->major_version() < 51);
545 }
547 bool Method::is_static_initializer() const {
548 // For classfiles version 51 or greater, ensure that the clinit method is
549 // static. Non-static methods with the name "<clinit>" are not static
550 // initializers. (older classfiles exempted for backward compatibility)
551 return name() == vmSymbols::class_initializer_name() &&
552 has_valid_initializer_flags();
553 }
556 objArrayHandle Method::resolved_checked_exceptions_impl(Method* this_oop, TRAPS) {
557 int length = this_oop->checked_exceptions_length();
558 if (length == 0) { // common case
559 return objArrayHandle(THREAD, Universe::the_empty_class_klass_array());
560 } else {
561 methodHandle h_this(THREAD, this_oop);
562 objArrayOop m_oop = oopFactory::new_objArray(SystemDictionary::Class_klass(), length, CHECK_(objArrayHandle()));
563 objArrayHandle mirrors (THREAD, m_oop);
564 for (int i = 0; i < length; i++) {
565 CheckedExceptionElement* table = h_this->checked_exceptions_start(); // recompute on each iteration, not gc safe
566 Klass* k = h_this->constants()->klass_at(table[i].class_cp_index, CHECK_(objArrayHandle()));
567 assert(k->is_subclass_of(SystemDictionary::Throwable_klass()), "invalid exception class");
568 mirrors->obj_at_put(i, k->java_mirror());
569 }
570 return mirrors;
571 }
572 };
575 int Method::line_number_from_bci(int bci) const {
576 if (bci == SynchronizationEntryBCI) bci = 0;
577 assert(bci == 0 || 0 <= bci && bci < code_size(), "illegal bci");
578 int best_bci = 0;
579 int best_line = -1;
581 if (has_linenumber_table()) {
582 // The line numbers are a short array of 2-tuples [start_pc, line_number].
583 // Not necessarily sorted and not necessarily one-to-one.
584 CompressedLineNumberReadStream stream(compressed_linenumber_table());
585 while (stream.read_pair()) {
586 if (stream.bci() == bci) {
587 // perfect match
588 return stream.line();
589 } else {
590 // update best_bci/line
591 if (stream.bci() < bci && stream.bci() >= best_bci) {
592 best_bci = stream.bci();
593 best_line = stream.line();
594 }
595 }
596 }
597 }
598 return best_line;
599 }
602 bool Method::is_klass_loaded_by_klass_index(int klass_index) const {
603 if( constants()->tag_at(klass_index).is_unresolved_klass() ) {
604 Thread *thread = Thread::current();
605 Symbol* klass_name = constants()->klass_name_at(klass_index);
606 Handle loader(thread, method_holder()->class_loader());
607 Handle prot (thread, method_holder()->protection_domain());
608 return SystemDictionary::find(klass_name, loader, prot, thread) != NULL;
609 } else {
610 return true;
611 }
612 }
615 bool Method::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
616 int klass_index = constants()->klass_ref_index_at(refinfo_index);
617 if (must_be_resolved) {
618 // Make sure klass is resolved in constantpool.
619 if (constants()->tag_at(klass_index).is_unresolved_klass()) return false;
620 }
621 return is_klass_loaded_by_klass_index(klass_index);
622 }
625 void Method::set_native_function(address function, bool post_event_flag) {
626 assert(function != NULL, "use clear_native_function to unregister natives");
627 assert(!is_method_handle_intrinsic() || function == SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), "");
628 address* native_function = native_function_addr();
630 // We can see racers trying to place the same native function into place. Once
631 // is plenty.
632 address current = *native_function;
633 if (current == function) return;
634 if (post_event_flag && JvmtiExport::should_post_native_method_bind() &&
635 function != NULL) {
636 // native_method_throw_unsatisfied_link_error_entry() should only
637 // be passed when post_event_flag is false.
638 assert(function !=
639 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(),
640 "post_event_flag mis-match");
642 // post the bind event, and possible change the bind function
643 JvmtiExport::post_native_method_bind(this, &function);
644 }
645 *native_function = function;
646 // This function can be called more than once. We must make sure that we always
647 // use the latest registered method -> check if a stub already has been generated.
648 // If so, we have to make it not_entrant.
649 nmethod* nm = code(); // Put it into local variable to guard against concurrent updates
650 if (nm != NULL) {
651 nm->make_not_entrant();
652 }
653 }
656 bool Method::has_native_function() const {
657 if (is_method_handle_intrinsic())
658 return false; // special-cased in SharedRuntime::generate_native_wrapper
659 address func = native_function();
660 return (func != NULL && func != SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
661 }
664 void Method::clear_native_function() {
665 // Note: is_method_handle_intrinsic() is allowed here.
666 set_native_function(
667 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(),
668 !native_bind_event_is_interesting);
669 clear_code();
670 }
672 address Method::critical_native_function() {
673 methodHandle mh(this);
674 return NativeLookup::lookup_critical_entry(mh);
675 }
678 void Method::set_signature_handler(address handler) {
679 address* signature_handler = signature_handler_addr();
680 *signature_handler = handler;
681 }
684 void Method::print_made_not_compilable(int comp_level, bool is_osr, bool report, const char* reason) {
685 if (PrintCompilation && report) {
686 ttyLocker ttyl;
687 tty->print("made not %scompilable on ", is_osr ? "OSR " : "");
688 if (comp_level == CompLevel_all) {
689 tty->print("all levels ");
690 } else {
691 tty->print("levels ");
692 for (int i = (int)CompLevel_none; i <= comp_level; i++) {
693 tty->print("%d ", i);
694 }
695 }
696 this->print_short_name(tty);
697 int size = this->code_size();
698 if (size > 0) {
699 tty->print(" (%d bytes)", size);
700 }
701 if (reason != NULL) {
702 tty->print(" %s", reason);
703 }
704 tty->cr();
705 }
706 if ((TraceDeoptimization || LogCompilation) && (xtty != NULL)) {
707 ttyLocker ttyl;
708 xtty->begin_elem("make_not_%scompilable thread='" UINTX_FORMAT "'",
709 is_osr ? "osr_" : "", os::current_thread_id());
710 if (reason != NULL) {
711 xtty->print(" reason=\'%s\'", reason);
712 }
713 xtty->method(this);
714 xtty->stamp();
715 xtty->end_elem();
716 }
717 }
719 bool Method::is_not_compilable(int comp_level) const {
720 if (number_of_breakpoints() > 0)
721 return true;
722 if (is_method_handle_intrinsic())
723 return !is_synthetic(); // the generated adapters must be compiled
724 if (comp_level == CompLevel_any)
725 return is_not_c1_compilable() || is_not_c2_compilable();
726 if (is_c1_compile(comp_level))
727 return is_not_c1_compilable();
728 if (is_c2_compile(comp_level))
729 return is_not_c2_compilable();
730 return false;
731 }
733 // call this when compiler finds that this method is not compilable
734 void Method::set_not_compilable(int comp_level, bool report, const char* reason) {
735 print_made_not_compilable(comp_level, /*is_osr*/ false, report, reason);
736 if (comp_level == CompLevel_all) {
737 set_not_c1_compilable();
738 set_not_c2_compilable();
739 } else {
740 if (is_c1_compile(comp_level))
741 set_not_c1_compilable();
742 if (is_c2_compile(comp_level))
743 set_not_c2_compilable();
744 }
745 CompilationPolicy::policy()->disable_compilation(this);
746 }
748 bool Method::is_not_osr_compilable(int comp_level) const {
749 if (is_not_compilable(comp_level))
750 return true;
751 if (comp_level == CompLevel_any)
752 return is_not_c1_osr_compilable() || is_not_c2_osr_compilable();
753 if (is_c1_compile(comp_level))
754 return is_not_c1_osr_compilable();
755 if (is_c2_compile(comp_level))
756 return is_not_c2_osr_compilable();
757 return false;
758 }
760 void Method::set_not_osr_compilable(int comp_level, bool report, const char* reason) {
761 print_made_not_compilable(comp_level, /*is_osr*/ true, report, reason);
762 if (comp_level == CompLevel_all) {
763 set_not_c1_osr_compilable();
764 set_not_c2_osr_compilable();
765 } else {
766 if (is_c1_compile(comp_level))
767 set_not_c1_osr_compilable();
768 if (is_c2_compile(comp_level))
769 set_not_c2_osr_compilable();
770 }
771 CompilationPolicy::policy()->disable_compilation(this);
772 }
774 // Revert to using the interpreter and clear out the nmethod
775 void Method::clear_code() {
777 // this may be NULL if c2i adapters have not been made yet
778 // Only should happen at allocate time.
779 if (_adapter == NULL) {
780 _from_compiled_entry = NULL;
781 } else {
782 _from_compiled_entry = _adapter->get_c2i_entry();
783 }
784 OrderAccess::storestore();
785 _from_interpreted_entry = _i2i_entry;
786 OrderAccess::storestore();
787 _code = NULL;
788 }
790 // Called by class data sharing to remove any entry points (which are not shared)
791 void Method::unlink_method() {
792 _code = NULL;
793 _i2i_entry = NULL;
794 _from_interpreted_entry = NULL;
795 if (is_native()) {
796 *native_function_addr() = NULL;
797 set_signature_handler(NULL);
798 }
799 NOT_PRODUCT(set_compiled_invocation_count(0);)
800 invocation_counter()->reset();
801 backedge_counter()->reset();
802 _adapter = NULL;
803 _from_compiled_entry = NULL;
804 assert(_method_data == NULL, "unexpected method data?");
805 set_method_data(NULL);
806 set_interpreter_throwout_count(0);
807 set_interpreter_invocation_count(0);
808 }
810 // Called when the method_holder is getting linked. Setup entrypoints so the method
811 // is ready to be called from interpreter, compiler, and vtables.
812 void Method::link_method(methodHandle h_method, TRAPS) {
813 // If the code cache is full, we may reenter this function for the
814 // leftover methods that weren't linked.
815 if (_i2i_entry != NULL) return;
817 assert(_adapter == NULL, "init'd to NULL" );
818 assert( _code == NULL, "nothing compiled yet" );
820 // Setup interpreter entrypoint
821 assert(this == h_method(), "wrong h_method()" );
822 address entry = Interpreter::entry_for_method(h_method);
823 assert(entry != NULL, "interpreter entry must be non-null");
824 // Sets both _i2i_entry and _from_interpreted_entry
825 set_interpreter_entry(entry);
826 if (is_native() && !is_method_handle_intrinsic()) {
827 set_native_function(
828 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(),
829 !native_bind_event_is_interesting);
830 }
832 // Setup compiler entrypoint. This is made eagerly, so we do not need
833 // special handling of vtables. An alternative is to make adapters more
834 // lazily by calling make_adapter() from from_compiled_entry() for the
835 // normal calls. For vtable calls life gets more complicated. When a
836 // call-site goes mega-morphic we need adapters in all methods which can be
837 // called from the vtable. We need adapters on such methods that get loaded
838 // later. Ditto for mega-morphic itable calls. If this proves to be a
839 // problem we'll make these lazily later.
840 (void) make_adapters(h_method, CHECK);
842 // ONLY USE the h_method now as make_adapter may have blocked
844 }
846 address Method::make_adapters(methodHandle mh, TRAPS) {
847 // Adapters for compiled code are made eagerly here. They are fairly
848 // small (generally < 100 bytes) and quick to make (and cached and shared)
849 // so making them eagerly shouldn't be too expensive.
850 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh);
851 if (adapter == NULL ) {
852 THROW_MSG_NULL(vmSymbols::java_lang_VirtualMachineError(), "out of space in CodeCache for adapters");
853 }
855 mh->set_adapter_entry(adapter);
856 mh->_from_compiled_entry = adapter->get_c2i_entry();
857 return adapter->get_c2i_entry();
858 }
860 // The verified_code_entry() must be called when a invoke is resolved
861 // on this method.
863 // It returns the compiled code entry point, after asserting not null.
864 // This function is called after potential safepoints so that nmethod
865 // or adapter that it points to is still live and valid.
866 // This function must not hit a safepoint!
867 address Method::verified_code_entry() {
868 debug_only(No_Safepoint_Verifier nsv;)
869 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code);
870 if (code == NULL && UseCodeCacheFlushing) {
871 nmethod *saved_code = CodeCache::find_and_remove_saved_code(this);
872 if (saved_code != NULL) {
873 methodHandle method(this);
874 assert( ! saved_code->is_osr_method(), "should not get here for osr" );
875 set_code( method, saved_code );
876 }
877 }
879 assert(_from_compiled_entry != NULL, "must be set");
880 return _from_compiled_entry;
881 }
883 // Check that if an nmethod ref exists, it has a backlink to this or no backlink at all
884 // (could be racing a deopt).
885 // Not inline to avoid circular ref.
886 bool Method::check_code() const {
887 // cached in a register or local. There's a race on the value of the field.
888 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code);
889 return code == NULL || (code->method() == NULL) || (code->method() == (Method*)this && !code->is_osr_method());
890 }
892 // Install compiled code. Instantly it can execute.
893 void Method::set_code(methodHandle mh, nmethod *code) {
894 assert( code, "use clear_code to remove code" );
895 assert( mh->check_code(), "" );
897 guarantee(mh->adapter() != NULL, "Adapter blob must already exist!");
899 // These writes must happen in this order, because the interpreter will
900 // directly jump to from_interpreted_entry which jumps to an i2c adapter
901 // which jumps to _from_compiled_entry.
902 mh->_code = code; // Assign before allowing compiled code to exec
904 int comp_level = code->comp_level();
905 // In theory there could be a race here. In practice it is unlikely
906 // and not worth worrying about.
907 if (comp_level > mh->highest_comp_level()) {
908 mh->set_highest_comp_level(comp_level);
909 }
911 OrderAccess::storestore();
912 #ifdef SHARK
913 mh->_from_interpreted_entry = code->insts_begin();
914 #else //!SHARK
915 mh->_from_compiled_entry = code->verified_entry_point();
916 OrderAccess::storestore();
917 // Instantly compiled code can execute.
918 if (!mh->is_method_handle_intrinsic())
919 mh->_from_interpreted_entry = mh->get_i2c_entry();
920 #endif //!SHARK
921 }
924 bool Method::is_overridden_in(Klass* k) const {
925 InstanceKlass* ik = InstanceKlass::cast(k);
927 if (ik->is_interface()) return false;
929 // If method is an interface, we skip it - except if it
930 // is a miranda method
931 if (method_holder()->is_interface()) {
932 // Check that method is not a miranda method
933 if (ik->lookup_method(name(), signature()) == NULL) {
934 // No implementation exist - so miranda method
935 return false;
936 }
937 return true;
938 }
940 assert(ik->is_subclass_of(method_holder()), "should be subklass");
941 assert(ik->vtable() != NULL, "vtable should exist");
942 if (vtable_index() == nonvirtual_vtable_index) {
943 return false;
944 } else {
945 Method* vt_m = ik->method_at_vtable(vtable_index());
946 return vt_m != this;
947 }
948 }
951 // give advice about whether this Method* should be cached or not
952 bool Method::should_not_be_cached() const {
953 if (is_old()) {
954 // This method has been redefined. It is either EMCP or obsolete
955 // and we don't want to cache it because that would pin the method
956 // down and prevent it from being collectible if and when it
957 // finishes executing.
958 return true;
959 }
961 // caching this method should be just fine
962 return false;
963 }
965 // Constant pool structure for invoke methods:
966 enum {
967 _imcp_invoke_name = 1, // utf8: 'invokeExact', etc.
968 _imcp_invoke_signature, // utf8: (variable Symbol*)
969 _imcp_limit
970 };
972 // Test if this method is an MH adapter frame generated by Java code.
973 // Cf. java/lang/invoke/InvokerBytecodeGenerator
974 bool Method::is_compiled_lambda_form() const {
975 return intrinsic_id() == vmIntrinsics::_compiledLambdaForm;
976 }
978 // Test if this method is an internal MH primitive method.
979 bool Method::is_method_handle_intrinsic() const {
980 vmIntrinsics::ID iid = intrinsic_id();
981 return (MethodHandles::is_signature_polymorphic(iid) &&
982 MethodHandles::is_signature_polymorphic_intrinsic(iid));
983 }
985 bool Method::has_member_arg() const {
986 vmIntrinsics::ID iid = intrinsic_id();
987 return (MethodHandles::is_signature_polymorphic(iid) &&
988 MethodHandles::has_member_arg(iid));
989 }
991 // Make an instance of a signature-polymorphic internal MH primitive.
992 methodHandle Method::make_method_handle_intrinsic(vmIntrinsics::ID iid,
993 Symbol* signature,
994 TRAPS) {
995 ResourceMark rm;
996 methodHandle empty;
998 KlassHandle holder = SystemDictionary::MethodHandle_klass();
999 Symbol* name = MethodHandles::signature_polymorphic_intrinsic_name(iid);
1000 assert(iid == MethodHandles::signature_polymorphic_name_id(name), "");
1001 if (TraceMethodHandles) {
1002 tty->print_cr("make_method_handle_intrinsic MH.%s%s", name->as_C_string(), signature->as_C_string());
1003 }
1005 // invariant: cp->symbol_at_put is preceded by a refcount increment (more usually a lookup)
1006 name->increment_refcount();
1007 signature->increment_refcount();
1009 int cp_length = _imcp_limit;
1010 ClassLoaderData* loader_data = holder->class_loader_data();
1011 constantPoolHandle cp;
1012 {
1013 ConstantPool* cp_oop = ConstantPool::allocate(loader_data, cp_length, CHECK_(empty));
1014 cp = constantPoolHandle(THREAD, cp_oop);
1015 }
1016 cp->set_pool_holder(InstanceKlass::cast(holder()));
1017 cp->symbol_at_put(_imcp_invoke_name, name);
1018 cp->symbol_at_put(_imcp_invoke_signature, signature);
1019 cp->set_has_preresolution();
1021 // decide on access bits: public or not?
1022 int flags_bits = (JVM_ACC_NATIVE | JVM_ACC_SYNTHETIC | JVM_ACC_FINAL);
1023 bool must_be_static = MethodHandles::is_signature_polymorphic_static(iid);
1024 if (must_be_static) flags_bits |= JVM_ACC_STATIC;
1025 assert((flags_bits & JVM_ACC_PUBLIC) == 0, "do not expose these methods");
1027 methodHandle m;
1028 {
1029 InlineTableSizes sizes;
1030 Method* m_oop = Method::allocate(loader_data, 0,
1031 accessFlags_from(flags_bits), &sizes,
1032 ConstMethod::NORMAL, CHECK_(empty));
1033 m = methodHandle(THREAD, m_oop);
1034 }
1035 m->set_constants(cp());
1036 m->set_name_index(_imcp_invoke_name);
1037 m->set_signature_index(_imcp_invoke_signature);
1038 assert(MethodHandles::is_signature_polymorphic_name(m->name()), "");
1039 assert(m->signature() == signature, "");
1040 #ifdef CC_INTERP
1041 ResultTypeFinder rtf(signature);
1042 m->set_result_index(rtf.type());
1043 #endif
1044 m->compute_size_of_parameters(THREAD);
1045 m->init_intrinsic_id();
1046 assert(m->is_method_handle_intrinsic(), "");
1047 #ifdef ASSERT
1048 if (!MethodHandles::is_signature_polymorphic(m->intrinsic_id())) m->print();
1049 assert(MethodHandles::is_signature_polymorphic(m->intrinsic_id()), "must be an invoker");
1050 assert(m->intrinsic_id() == iid, "correctly predicted iid");
1051 #endif //ASSERT
1053 // Finally, set up its entry points.
1054 assert(m->can_be_statically_bound(), "");
1055 m->set_vtable_index(Method::nonvirtual_vtable_index);
1056 m->link_method(m, CHECK_(empty));
1058 if (TraceMethodHandles && (Verbose || WizardMode))
1059 m->print_on(tty);
1061 return m;
1062 }
1064 Klass* Method::check_non_bcp_klass(Klass* klass) {
1065 if (klass != NULL && klass->class_loader() != NULL) {
1066 if (klass->oop_is_objArray())
1067 klass = ObjArrayKlass::cast(klass)->bottom_klass();
1068 return klass;
1069 }
1070 return NULL;
1071 }
1074 methodHandle Method::clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length,
1075 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS) {
1076 // Code below does not work for native methods - they should never get rewritten anyway
1077 assert(!m->is_native(), "cannot rewrite native methods");
1078 // Allocate new Method*
1079 AccessFlags flags = m->access_flags();
1081 ConstMethod* cm = m->constMethod();
1082 int checked_exceptions_len = cm->checked_exceptions_length();
1083 int localvariable_len = cm->localvariable_table_length();
1084 int exception_table_len = cm->exception_table_length();
1085 int method_parameters_len = cm->method_parameters_length();
1086 int method_annotations_len = cm->method_annotations_length();
1087 int parameter_annotations_len = cm->parameter_annotations_length();
1088 int type_annotations_len = cm->type_annotations_length();
1089 int default_annotations_len = cm->default_annotations_length();
1091 InlineTableSizes sizes(
1092 localvariable_len,
1093 new_compressed_linenumber_size,
1094 exception_table_len,
1095 checked_exceptions_len,
1096 method_parameters_len,
1097 cm->generic_signature_index(),
1098 method_annotations_len,
1099 parameter_annotations_len,
1100 type_annotations_len,
1101 default_annotations_len,
1102 0);
1104 ClassLoaderData* loader_data = m->method_holder()->class_loader_data();
1105 Method* newm_oop = Method::allocate(loader_data,
1106 new_code_length,
1107 flags,
1108 &sizes,
1109 m->method_type(),
1110 CHECK_(methodHandle()));
1111 methodHandle newm (THREAD, newm_oop);
1112 int new_method_size = newm->method_size();
1114 // Create a shallow copy of Method part, but be careful to preserve the new ConstMethod*
1115 ConstMethod* newcm = newm->constMethod();
1116 int new_const_method_size = newm->constMethod()->size();
1118 memcpy(newm(), m(), sizeof(Method));
1120 // Create shallow copy of ConstMethod.
1121 memcpy(newcm, m->constMethod(), sizeof(ConstMethod));
1123 // Reset correct method/const method, method size, and parameter info
1124 newm->set_constMethod(newcm);
1125 newm->constMethod()->set_code_size(new_code_length);
1126 newm->constMethod()->set_constMethod_size(new_const_method_size);
1127 newm->set_method_size(new_method_size);
1128 assert(newm->code_size() == new_code_length, "check");
1129 assert(newm->checked_exceptions_length() == checked_exceptions_len, "check");
1130 assert(newm->exception_table_length() == exception_table_len, "check");
1131 assert(newm->localvariable_table_length() == localvariable_len, "check");
1132 // Copy new byte codes
1133 memcpy(newm->code_base(), new_code, new_code_length);
1134 // Copy line number table
1135 if (new_compressed_linenumber_size > 0) {
1136 memcpy(newm->compressed_linenumber_table(),
1137 new_compressed_linenumber_table,
1138 new_compressed_linenumber_size);
1139 }
1140 // Copy checked_exceptions
1141 if (checked_exceptions_len > 0) {
1142 memcpy(newm->checked_exceptions_start(),
1143 m->checked_exceptions_start(),
1144 checked_exceptions_len * sizeof(CheckedExceptionElement));
1145 }
1146 // Copy exception table
1147 if (exception_table_len > 0) {
1148 memcpy(newm->exception_table_start(),
1149 m->exception_table_start(),
1150 exception_table_len * sizeof(ExceptionTableElement));
1151 }
1152 // Copy local variable number table
1153 if (localvariable_len > 0) {
1154 memcpy(newm->localvariable_table_start(),
1155 m->localvariable_table_start(),
1156 localvariable_len * sizeof(LocalVariableTableElement));
1157 }
1158 // Copy stackmap table
1159 if (m->has_stackmap_table()) {
1160 int code_attribute_length = m->stackmap_data()->length();
1161 Array<u1>* stackmap_data =
1162 MetadataFactory::new_array<u1>(loader_data, code_attribute_length, 0, CHECK_NULL);
1163 memcpy((void*)stackmap_data->adr_at(0),
1164 (void*)m->stackmap_data()->adr_at(0), code_attribute_length);
1165 newm->set_stackmap_data(stackmap_data);
1166 }
1168 return newm;
1169 }
1171 vmSymbols::SID Method::klass_id_for_intrinsics(Klass* holder) {
1172 // if loader is not the default loader (i.e., != NULL), we can't know the intrinsics
1173 // because we are not loading from core libraries
1174 // exception: the AES intrinsics come from lib/ext/sunjce_provider.jar
1175 // which does not use the class default class loader so we check for its loader here
1176 if ((InstanceKlass::cast(holder)->class_loader() != NULL) &&
1177 InstanceKlass::cast(holder)->class_loader()->klass()->name() != vmSymbols::sun_misc_Launcher_ExtClassLoader()) {
1178 return vmSymbols::NO_SID; // regardless of name, no intrinsics here
1179 }
1181 // see if the klass name is well-known:
1182 Symbol* klass_name = InstanceKlass::cast(holder)->name();
1183 return vmSymbols::find_sid(klass_name);
1184 }
1186 void Method::init_intrinsic_id() {
1187 assert(_intrinsic_id == vmIntrinsics::_none, "do this just once");
1188 const uintptr_t max_id_uint = right_n_bits((int)(sizeof(_intrinsic_id) * BitsPerByte));
1189 assert((uintptr_t)vmIntrinsics::ID_LIMIT <= max_id_uint, "else fix size");
1190 assert(intrinsic_id_size_in_bytes() == sizeof(_intrinsic_id), "");
1192 // the klass name is well-known:
1193 vmSymbols::SID klass_id = klass_id_for_intrinsics(method_holder());
1194 assert(klass_id != vmSymbols::NO_SID, "caller responsibility");
1196 // ditto for method and signature:
1197 vmSymbols::SID name_id = vmSymbols::find_sid(name());
1198 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle)
1199 && name_id == vmSymbols::NO_SID)
1200 return;
1201 vmSymbols::SID sig_id = vmSymbols::find_sid(signature());
1202 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle)
1203 && sig_id == vmSymbols::NO_SID) return;
1204 jshort flags = access_flags().as_short();
1206 vmIntrinsics::ID id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags);
1207 if (id != vmIntrinsics::_none) {
1208 set_intrinsic_id(id);
1209 return;
1210 }
1212 // A few slightly irregular cases:
1213 switch (klass_id) {
1214 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_StrictMath):
1215 // Second chance: check in regular Math.
1216 switch (name_id) {
1217 case vmSymbols::VM_SYMBOL_ENUM_NAME(min_name):
1218 case vmSymbols::VM_SYMBOL_ENUM_NAME(max_name):
1219 case vmSymbols::VM_SYMBOL_ENUM_NAME(sqrt_name):
1220 // pretend it is the corresponding method in the non-strict class:
1221 klass_id = vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_Math);
1222 id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags);
1223 break;
1224 }
1225 break;
1227 // Signature-polymorphic methods: MethodHandle.invoke*, InvokeDynamic.*.
1228 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle):
1229 if (!is_native()) break;
1230 id = MethodHandles::signature_polymorphic_name_id(method_holder(), name());
1231 if (is_static() != MethodHandles::is_signature_polymorphic_static(id))
1232 id = vmIntrinsics::_none;
1233 break;
1234 }
1236 if (id != vmIntrinsics::_none) {
1237 // Set up its iid. It is an alias method.
1238 set_intrinsic_id(id);
1239 return;
1240 }
1241 }
1243 // These two methods are static since a GC may move the Method
1244 bool Method::load_signature_classes(methodHandle m, TRAPS) {
1245 if (THREAD->is_Compiler_thread()) {
1246 // There is nothing useful this routine can do from within the Compile thread.
1247 // Hopefully, the signature contains only well-known classes.
1248 // We could scan for this and return true/false, but the caller won't care.
1249 return false;
1250 }
1251 bool sig_is_loaded = true;
1252 Handle class_loader(THREAD, m->method_holder()->class_loader());
1253 Handle protection_domain(THREAD, m->method_holder()->protection_domain());
1254 ResourceMark rm(THREAD);
1255 Symbol* signature = m->signature();
1256 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) {
1257 if (ss.is_object()) {
1258 Symbol* sym = ss.as_symbol(CHECK_(false));
1259 Symbol* name = sym;
1260 Klass* klass = SystemDictionary::resolve_or_null(name, class_loader,
1261 protection_domain, THREAD);
1262 // We are loading classes eagerly. If a ClassNotFoundException or
1263 // a LinkageError was generated, be sure to ignore it.
1264 if (HAS_PENDING_EXCEPTION) {
1265 if (PENDING_EXCEPTION->is_a(SystemDictionary::ClassNotFoundException_klass()) ||
1266 PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1267 CLEAR_PENDING_EXCEPTION;
1268 } else {
1269 return false;
1270 }
1271 }
1272 if( klass == NULL) { sig_is_loaded = false; }
1273 }
1274 }
1275 return sig_is_loaded;
1276 }
1278 bool Method::has_unloaded_classes_in_signature(methodHandle m, TRAPS) {
1279 Handle class_loader(THREAD, m->method_holder()->class_loader());
1280 Handle protection_domain(THREAD, m->method_holder()->protection_domain());
1281 ResourceMark rm(THREAD);
1282 Symbol* signature = m->signature();
1283 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) {
1284 if (ss.type() == T_OBJECT) {
1285 Symbol* name = ss.as_symbol_or_null();
1286 if (name == NULL) return true;
1287 Klass* klass = SystemDictionary::find(name, class_loader, protection_domain, THREAD);
1288 if (klass == NULL) return true;
1289 }
1290 }
1291 return false;
1292 }
1294 // Exposed so field engineers can debug VM
1295 void Method::print_short_name(outputStream* st) {
1296 ResourceMark rm;
1297 #ifdef PRODUCT
1298 st->print(" %s::", method_holder()->external_name());
1299 #else
1300 st->print(" %s::", method_holder()->internal_name());
1301 #endif
1302 name()->print_symbol_on(st);
1303 if (WizardMode) signature()->print_symbol_on(st);
1304 else if (MethodHandles::is_signature_polymorphic(intrinsic_id()))
1305 MethodHandles::print_as_basic_type_signature_on(st, signature(), true);
1306 }
1308 // Comparer for sorting an object array containing
1309 // Method*s.
1310 static int method_comparator(Method* a, Method* b) {
1311 return a->name()->fast_compare(b->name());
1312 }
1314 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array
1315 void Method::sort_methods(Array<Method*>* methods, bool idempotent) {
1316 int length = methods->length();
1317 if (length > 1) {
1318 {
1319 No_Safepoint_Verifier nsv;
1320 QuickSort::sort<Method*>(methods->data(), length, method_comparator, idempotent);
1321 }
1322 // Reset method ordering
1323 for (int i = 0; i < length; i++) {
1324 Method* m = methods->at(i);
1325 m->set_method_idnum(i);
1326 }
1327 }
1328 }
1331 //-----------------------------------------------------------------------------------
1332 // Non-product code unless JVM/TI needs it
1334 #if !defined(PRODUCT) || INCLUDE_JVMTI
1335 class SignatureTypePrinter : public SignatureTypeNames {
1336 private:
1337 outputStream* _st;
1338 bool _use_separator;
1340 void type_name(const char* name) {
1341 if (_use_separator) _st->print(", ");
1342 _st->print(name);
1343 _use_separator = true;
1344 }
1346 public:
1347 SignatureTypePrinter(Symbol* signature, outputStream* st) : SignatureTypeNames(signature) {
1348 _st = st;
1349 _use_separator = false;
1350 }
1352 void print_parameters() { _use_separator = false; iterate_parameters(); }
1353 void print_returntype() { _use_separator = false; iterate_returntype(); }
1354 };
1357 void Method::print_name(outputStream* st) {
1358 Thread *thread = Thread::current();
1359 ResourceMark rm(thread);
1360 SignatureTypePrinter sig(signature(), st);
1361 st->print("%s ", is_static() ? "static" : "virtual");
1362 sig.print_returntype();
1363 st->print(" %s.", method_holder()->internal_name());
1364 name()->print_symbol_on(st);
1365 st->print("(");
1366 sig.print_parameters();
1367 st->print(")");
1368 }
1369 #endif // !PRODUCT || INCLUDE_JVMTI
1372 //-----------------------------------------------------------------------------------
1373 // Non-product code
1375 #ifndef PRODUCT
1376 void Method::print_codes_on(outputStream* st) const {
1377 print_codes_on(0, code_size(), st);
1378 }
1380 void Method::print_codes_on(int from, int to, outputStream* st) const {
1381 Thread *thread = Thread::current();
1382 ResourceMark rm(thread);
1383 methodHandle mh (thread, (Method*)this);
1384 BytecodeStream s(mh);
1385 s.set_interval(from, to);
1386 BytecodeTracer::set_closure(BytecodeTracer::std_closure());
1387 while (s.next() >= 0) BytecodeTracer::trace(mh, s.bcp(), st);
1388 }
1389 #endif // not PRODUCT
1392 // Simple compression of line number tables. We use a regular compressed stream, except that we compress deltas
1393 // between (bci,line) pairs since they are smaller. If (bci delta, line delta) fits in (5-bit unsigned, 3-bit unsigned)
1394 // we save it as one byte, otherwise we write a 0xFF escape character and use regular compression. 0x0 is used
1395 // as end-of-stream terminator.
1397 void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) {
1398 // bci and line number does not compress into single byte.
1399 // Write out escape character and use regular compression for bci and line number.
1400 write_byte((jubyte)0xFF);
1401 write_signed_int(bci_delta);
1402 write_signed_int(line_delta);
1403 }
1405 // See comment in method.hpp which explains why this exists.
1406 #if defined(_M_AMD64) && _MSC_VER >= 1400
1407 #pragma optimize("", off)
1408 void CompressedLineNumberWriteStream::write_pair(int bci, int line) {
1409 write_pair_inline(bci, line);
1410 }
1411 #pragma optimize("", on)
1412 #endif
1414 CompressedLineNumberReadStream::CompressedLineNumberReadStream(u_char* buffer) : CompressedReadStream(buffer) {
1415 _bci = 0;
1416 _line = 0;
1417 };
1420 bool CompressedLineNumberReadStream::read_pair() {
1421 jubyte next = read_byte();
1422 // Check for terminator
1423 if (next == 0) return false;
1424 if (next == 0xFF) {
1425 // Escape character, regular compression used
1426 _bci += read_signed_int();
1427 _line += read_signed_int();
1428 } else {
1429 // Single byte compression used
1430 _bci += next >> 3;
1431 _line += next & 0x7;
1432 }
1433 return true;
1434 }
1437 Bytecodes::Code Method::orig_bytecode_at(int bci) const {
1438 BreakpointInfo* bp = method_holder()->breakpoints();
1439 for (; bp != NULL; bp = bp->next()) {
1440 if (bp->match(this, bci)) {
1441 return bp->orig_bytecode();
1442 }
1443 }
1444 ShouldNotReachHere();
1445 return Bytecodes::_shouldnotreachhere;
1446 }
1448 void Method::set_orig_bytecode_at(int bci, Bytecodes::Code code) {
1449 assert(code != Bytecodes::_breakpoint, "cannot patch breakpoints this way");
1450 BreakpointInfo* bp = method_holder()->breakpoints();
1451 for (; bp != NULL; bp = bp->next()) {
1452 if (bp->match(this, bci)) {
1453 bp->set_orig_bytecode(code);
1454 // and continue, in case there is more than one
1455 }
1456 }
1457 }
1459 void Method::set_breakpoint(int bci) {
1460 InstanceKlass* ik = method_holder();
1461 BreakpointInfo *bp = new BreakpointInfo(this, bci);
1462 bp->set_next(ik->breakpoints());
1463 ik->set_breakpoints(bp);
1464 // do this last:
1465 bp->set(this);
1466 }
1468 static void clear_matches(Method* m, int bci) {
1469 InstanceKlass* ik = m->method_holder();
1470 BreakpointInfo* prev_bp = NULL;
1471 BreakpointInfo* next_bp;
1472 for (BreakpointInfo* bp = ik->breakpoints(); bp != NULL; bp = next_bp) {
1473 next_bp = bp->next();
1474 // bci value of -1 is used to delete all breakpoints in method m (ex: clear_all_breakpoint).
1475 if (bci >= 0 ? bp->match(m, bci) : bp->match(m)) {
1476 // do this first:
1477 bp->clear(m);
1478 // unhook it
1479 if (prev_bp != NULL)
1480 prev_bp->set_next(next_bp);
1481 else
1482 ik->set_breakpoints(next_bp);
1483 delete bp;
1484 // When class is redefined JVMTI sets breakpoint in all versions of EMCP methods
1485 // at same location. So we have multiple matching (method_index and bci)
1486 // BreakpointInfo nodes in BreakpointInfo list. We should just delete one
1487 // breakpoint for clear_breakpoint request and keep all other method versions
1488 // BreakpointInfo for future clear_breakpoint request.
1489 // bcivalue of -1 is used to clear all breakpoints (see clear_all_breakpoints)
1490 // which is being called when class is unloaded. We delete all the Breakpoint
1491 // information for all versions of method. We may not correctly restore the original
1492 // bytecode in all method versions, but that is ok. Because the class is being unloaded
1493 // so these methods won't be used anymore.
1494 if (bci >= 0) {
1495 break;
1496 }
1497 } else {
1498 // This one is a keeper.
1499 prev_bp = bp;
1500 }
1501 }
1502 }
1504 void Method::clear_breakpoint(int bci) {
1505 assert(bci >= 0, "");
1506 clear_matches(this, bci);
1507 }
1509 void Method::clear_all_breakpoints() {
1510 clear_matches(this, -1);
1511 }
1514 int Method::invocation_count() {
1515 if (TieredCompilation) {
1516 MethodData* const mdo = method_data();
1517 if (invocation_counter()->carry() || ((mdo != NULL) ? mdo->invocation_counter()->carry() : false)) {
1518 return InvocationCounter::count_limit;
1519 } else {
1520 return invocation_counter()->count() + ((mdo != NULL) ? mdo->invocation_counter()->count() : 0);
1521 }
1522 } else {
1523 return invocation_counter()->count();
1524 }
1525 }
1527 int Method::backedge_count() {
1528 if (TieredCompilation) {
1529 MethodData* const mdo = method_data();
1530 if (backedge_counter()->carry() || ((mdo != NULL) ? mdo->backedge_counter()->carry() : false)) {
1531 return InvocationCounter::count_limit;
1532 } else {
1533 return backedge_counter()->count() + ((mdo != NULL) ? mdo->backedge_counter()->count() : 0);
1534 }
1535 } else {
1536 return backedge_counter()->count();
1537 }
1538 }
1540 int Method::highest_comp_level() const {
1541 MethodData* mdo = method_data();
1542 if (mdo != NULL) {
1543 return mdo->highest_comp_level();
1544 } else {
1545 return CompLevel_none;
1546 }
1547 }
1549 int Method::highest_osr_comp_level() const {
1550 MethodData* mdo = method_data();
1551 if (mdo != NULL) {
1552 return mdo->highest_osr_comp_level();
1553 } else {
1554 return CompLevel_none;
1555 }
1556 }
1558 void Method::set_highest_comp_level(int level) {
1559 MethodData* mdo = method_data();
1560 if (mdo != NULL) {
1561 mdo->set_highest_comp_level(level);
1562 }
1563 }
1565 void Method::set_highest_osr_comp_level(int level) {
1566 MethodData* mdo = method_data();
1567 if (mdo != NULL) {
1568 mdo->set_highest_osr_comp_level(level);
1569 }
1570 }
1572 BreakpointInfo::BreakpointInfo(Method* m, int bci) {
1573 _bci = bci;
1574 _name_index = m->name_index();
1575 _signature_index = m->signature_index();
1576 _orig_bytecode = (Bytecodes::Code) *m->bcp_from(_bci);
1577 if (_orig_bytecode == Bytecodes::_breakpoint)
1578 _orig_bytecode = m->orig_bytecode_at(_bci);
1579 _next = NULL;
1580 }
1582 void BreakpointInfo::set(Method* method) {
1583 #ifdef ASSERT
1584 {
1585 Bytecodes::Code code = (Bytecodes::Code) *method->bcp_from(_bci);
1586 if (code == Bytecodes::_breakpoint)
1587 code = method->orig_bytecode_at(_bci);
1588 assert(orig_bytecode() == code, "original bytecode must be the same");
1589 }
1590 #endif
1591 *method->bcp_from(_bci) = Bytecodes::_breakpoint;
1592 method->incr_number_of_breakpoints();
1593 SystemDictionary::notice_modification();
1594 {
1595 // Deoptimize all dependents on this method
1596 Thread *thread = Thread::current();
1597 HandleMark hm(thread);
1598 methodHandle mh(thread, method);
1599 Universe::flush_dependents_on_method(mh);
1600 }
1601 }
1603 void BreakpointInfo::clear(Method* method) {
1604 *method->bcp_from(_bci) = orig_bytecode();
1605 assert(method->number_of_breakpoints() > 0, "must not go negative");
1606 method->decr_number_of_breakpoints();
1607 }
1609 // jmethodID handling
1611 // This is a block allocating object, sort of like JNIHandleBlock, only a
1612 // lot simpler. There aren't many of these, they aren't long, they are rarely
1613 // deleted and so we can do some suboptimal things.
1614 // It's allocated on the CHeap because once we allocate a jmethodID, we can
1615 // never get rid of it.
1616 // It would be nice to be able to parameterize the number of methods for
1617 // the null_class_loader but then we'd have to turn this and ClassLoaderData
1618 // into templates.
1620 // I feel like this brain dead class should exist somewhere in the STL
1622 class JNIMethodBlock : public CHeapObj<mtClass> {
1623 enum { number_of_methods = 8 };
1625 Method* _methods[number_of_methods];
1626 int _top;
1627 JNIMethodBlock* _next;
1628 public:
1629 static Method* const _free_method;
1631 JNIMethodBlock() : _next(NULL), _top(0) {
1632 for (int i = 0; i< number_of_methods; i++) _methods[i] = _free_method;
1633 }
1635 Method** add_method(Method* m) {
1636 if (_top < number_of_methods) {
1637 // top points to the next free entry.
1638 int i = _top;
1639 _methods[i] = m;
1640 _top++;
1641 return &_methods[i];
1642 } else if (_top == number_of_methods) {
1643 // if the next free entry ran off the block see if there's a free entry
1644 for (int i = 0; i< number_of_methods; i++) {
1645 if (_methods[i] == _free_method) {
1646 _methods[i] = m;
1647 return &_methods[i];
1648 }
1649 }
1650 // Only check each block once for frees. They're very unlikely.
1651 // Increment top past the end of the block.
1652 _top++;
1653 }
1654 // need to allocate a next block.
1655 if (_next == NULL) {
1656 _next = new JNIMethodBlock();
1657 }
1658 return _next->add_method(m);
1659 }
1661 bool contains(Method** m) {
1662 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) {
1663 for (int i = 0; i< number_of_methods; i++) {
1664 if (&(b->_methods[i]) == m) {
1665 return true;
1666 }
1667 }
1668 }
1669 return false; // not found
1670 }
1672 // Doesn't really destroy it, just marks it as free so it can be reused.
1673 void destroy_method(Method** m) {
1674 #ifdef ASSERT
1675 assert(contains(m), "should be a methodID");
1676 #endif // ASSERT
1677 *m = _free_method;
1678 }
1680 // During class unloading the methods are cleared, which is different
1681 // than freed.
1682 void clear_all_methods() {
1683 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) {
1684 for (int i = 0; i< number_of_methods; i++) {
1685 _methods[i] = NULL;
1686 }
1687 }
1688 }
1689 #ifndef PRODUCT
1690 int count_methods() {
1691 // count all allocated methods
1692 int count = 0;
1693 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) {
1694 for (int i = 0; i< number_of_methods; i++) {
1695 if (_methods[i] != _free_method) count++;
1696 }
1697 }
1698 return count;
1699 }
1700 #endif // PRODUCT
1701 };
1703 // Something that can't be mistaken for an address or a markOop
1704 Method* const JNIMethodBlock::_free_method = (Method*)55;
1706 // Add a method id to the jmethod_ids
1707 jmethodID Method::make_jmethod_id(ClassLoaderData* loader_data, Method* m) {
1708 ClassLoaderData* cld = loader_data;
1710 if (!SafepointSynchronize::is_at_safepoint()) {
1711 // Have to add jmethod_ids() to class loader data thread-safely.
1712 // Also have to add the method to the list safely, which the cld lock
1713 // protects as well.
1714 MutexLockerEx ml(cld->metaspace_lock(), Mutex::_no_safepoint_check_flag);
1715 if (cld->jmethod_ids() == NULL) {
1716 cld->set_jmethod_ids(new JNIMethodBlock());
1717 }
1718 // jmethodID is a pointer to Method*
1719 return (jmethodID)cld->jmethod_ids()->add_method(m);
1720 } else {
1721 // At safepoint, we are single threaded and can set this.
1722 if (cld->jmethod_ids() == NULL) {
1723 cld->set_jmethod_ids(new JNIMethodBlock());
1724 }
1725 // jmethodID is a pointer to Method*
1726 return (jmethodID)cld->jmethod_ids()->add_method(m);
1727 }
1728 }
1730 // Mark a jmethodID as free. This is called when there is a data race in
1731 // InstanceKlass while creating the jmethodID cache.
1732 void Method::destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID m) {
1733 ClassLoaderData* cld = loader_data;
1734 Method** ptr = (Method**)m;
1735 assert(cld->jmethod_ids() != NULL, "should have method handles");
1736 cld->jmethod_ids()->destroy_method(ptr);
1737 }
1739 void Method::change_method_associated_with_jmethod_id(jmethodID jmid, Method* new_method) {
1740 // Can't assert the method_holder is the same because the new method has the
1741 // scratch method holder.
1742 assert(resolve_jmethod_id(jmid)->method_holder()->class_loader()
1743 == new_method->method_holder()->class_loader(),
1744 "changing to a different class loader");
1745 // Just change the method in place, jmethodID pointer doesn't change.
1746 *((Method**)jmid) = new_method;
1747 }
1749 bool Method::is_method_id(jmethodID mid) {
1750 Method* m = resolve_jmethod_id(mid);
1751 assert(m != NULL, "should be called with non-null method");
1752 InstanceKlass* ik = m->method_holder();
1753 ClassLoaderData* cld = ik->class_loader_data();
1754 if (cld->jmethod_ids() == NULL) return false;
1755 return (cld->jmethod_ids()->contains((Method**)mid));
1756 }
1758 Method* Method::checked_resolve_jmethod_id(jmethodID mid) {
1759 if (mid == NULL) return NULL;
1760 Method* o = resolve_jmethod_id(mid);
1761 if (o == NULL || o == JNIMethodBlock::_free_method || !((Metadata*)o)->is_method()) {
1762 return NULL;
1763 }
1764 return o;
1765 };
1767 void Method::set_on_stack(const bool value) {
1768 // Set both the method itself and its constant pool. The constant pool
1769 // on stack means some method referring to it is also on the stack.
1770 _access_flags.set_on_stack(value);
1771 constants()->set_on_stack(value);
1772 if (value) MetadataOnStackMark::record(this);
1773 }
1775 // Called when the class loader is unloaded to make all methods weak.
1776 void Method::clear_jmethod_ids(ClassLoaderData* loader_data) {
1777 loader_data->jmethod_ids()->clear_all_methods();
1778 }
1781 // Check that this pointer is valid by checking that the vtbl pointer matches
1782 bool Method::is_valid_method() const {
1783 if (this == NULL) {
1784 return false;
1785 } else if (!is_metaspace_object()) {
1786 return false;
1787 } else {
1788 Method m;
1789 // This assumes that the vtbl pointer is the first word of a C++ object.
1790 // This assumption is also in universe.cpp patch_klass_vtble
1791 void* vtbl2 = dereference_vptr((void*)&m);
1792 void* this_vtbl = dereference_vptr((void*)this);
1793 return vtbl2 == this_vtbl;
1794 }
1795 }
1797 #ifndef PRODUCT
1798 void Method::print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) {
1799 out->print_cr("jni_method_id count = %d", loader_data->jmethod_ids()->count_methods());
1800 }
1801 #endif // PRODUCT
1804 // Printing
1806 #ifndef PRODUCT
1808 void Method::print_on(outputStream* st) const {
1809 ResourceMark rm;
1810 assert(is_method(), "must be method");
1811 st->print_cr(internal_name());
1812 // get the effect of PrintOopAddress, always, for methods:
1813 st->print_cr(" - this oop: "INTPTR_FORMAT, (intptr_t)this);
1814 st->print (" - method holder: "); method_holder()->print_value_on(st); st->cr();
1815 st->print (" - constants: "INTPTR_FORMAT" ", (address)constants());
1816 constants()->print_value_on(st); st->cr();
1817 st->print (" - access: 0x%x ", access_flags().as_int()); access_flags().print_on(st); st->cr();
1818 st->print (" - name: "); name()->print_value_on(st); st->cr();
1819 st->print (" - signature: "); signature()->print_value_on(st); st->cr();
1820 st->print_cr(" - max stack: %d", max_stack());
1821 st->print_cr(" - max locals: %d", max_locals());
1822 st->print_cr(" - size of params: %d", size_of_parameters());
1823 st->print_cr(" - method size: %d", method_size());
1824 if (intrinsic_id() != vmIntrinsics::_none)
1825 st->print_cr(" - intrinsic id: %d %s", intrinsic_id(), vmIntrinsics::name_at(intrinsic_id()));
1826 if (highest_comp_level() != CompLevel_none)
1827 st->print_cr(" - highest level: %d", highest_comp_level());
1828 st->print_cr(" - vtable index: %d", _vtable_index);
1829 st->print_cr(" - i2i entry: " INTPTR_FORMAT, interpreter_entry());
1830 st->print( " - adapters: ");
1831 AdapterHandlerEntry* a = ((Method*)this)->adapter();
1832 if (a == NULL)
1833 st->print_cr(INTPTR_FORMAT, a);
1834 else
1835 a->print_adapter_on(st);
1836 st->print_cr(" - compiled entry " INTPTR_FORMAT, from_compiled_entry());
1837 st->print_cr(" - code size: %d", code_size());
1838 if (code_size() != 0) {
1839 st->print_cr(" - code start: " INTPTR_FORMAT, code_base());
1840 st->print_cr(" - code end (excl): " INTPTR_FORMAT, code_base() + code_size());
1841 }
1842 if (method_data() != NULL) {
1843 st->print_cr(" - method data: " INTPTR_FORMAT, (address)method_data());
1844 }
1845 st->print_cr(" - checked ex length: %d", checked_exceptions_length());
1846 if (checked_exceptions_length() > 0) {
1847 CheckedExceptionElement* table = checked_exceptions_start();
1848 st->print_cr(" - checked ex start: " INTPTR_FORMAT, table);
1849 if (Verbose) {
1850 for (int i = 0; i < checked_exceptions_length(); i++) {
1851 st->print_cr(" - throws %s", constants()->printable_name_at(table[i].class_cp_index));
1852 }
1853 }
1854 }
1855 if (has_linenumber_table()) {
1856 u_char* table = compressed_linenumber_table();
1857 st->print_cr(" - linenumber start: " INTPTR_FORMAT, table);
1858 if (Verbose) {
1859 CompressedLineNumberReadStream stream(table);
1860 while (stream.read_pair()) {
1861 st->print_cr(" - line %d: %d", stream.line(), stream.bci());
1862 }
1863 }
1864 }
1865 st->print_cr(" - localvar length: %d", localvariable_table_length());
1866 if (localvariable_table_length() > 0) {
1867 LocalVariableTableElement* table = localvariable_table_start();
1868 st->print_cr(" - localvar start: " INTPTR_FORMAT, table);
1869 if (Verbose) {
1870 for (int i = 0; i < localvariable_table_length(); i++) {
1871 int bci = table[i].start_bci;
1872 int len = table[i].length;
1873 const char* name = constants()->printable_name_at(table[i].name_cp_index);
1874 const char* desc = constants()->printable_name_at(table[i].descriptor_cp_index);
1875 int slot = table[i].slot;
1876 st->print_cr(" - %s %s bci=%d len=%d slot=%d", desc, name, bci, len, slot);
1877 }
1878 }
1879 }
1880 if (code() != NULL) {
1881 st->print (" - compiled code: ");
1882 code()->print_value_on(st);
1883 }
1884 if (is_native()) {
1885 st->print_cr(" - native function: " INTPTR_FORMAT, native_function());
1886 st->print_cr(" - signature handler: " INTPTR_FORMAT, signature_handler());
1887 }
1888 }
1890 #endif //PRODUCT
1892 void Method::print_value_on(outputStream* st) const {
1893 assert(is_method(), "must be method");
1894 st->print_cr(internal_name());
1895 print_address_on(st);
1896 st->print(" ");
1897 name()->print_value_on(st);
1898 st->print(" ");
1899 signature()->print_value_on(st);
1900 st->print(" in ");
1901 method_holder()->print_value_on(st);
1902 if (WizardMode) st->print("[%d,%d]", size_of_parameters(), max_locals());
1903 if (WizardMode && code() != NULL) st->print(" ((nmethod*)%p)", code());
1904 }
1906 #if INCLUDE_SERVICES
1907 // Size Statistics
1908 void Method::collect_statistics(KlassSizeStats *sz) const {
1909 int mysize = sz->count(this);
1910 sz->_method_bytes += mysize;
1911 sz->_method_all_bytes += mysize;
1912 sz->_rw_bytes += mysize;
1914 if (constMethod()) {
1915 constMethod()->collect_statistics(sz);
1916 }
1917 if (method_data()) {
1918 method_data()->collect_statistics(sz);
1919 }
1920 }
1921 #endif // INCLUDE_SERVICES
1923 // Verification
1925 void Method::verify_on(outputStream* st) {
1926 guarantee(is_method(), "object must be method");
1927 guarantee(is_metadata(), "should be metadata");
1928 guarantee(constants()->is_constantPool(), "should be constant pool");
1929 guarantee(constants()->is_metadata(), "should be metadata");
1930 guarantee(constMethod()->is_constMethod(), "should be ConstMethod*");
1931 guarantee(constMethod()->is_metadata(), "should be metadata");
1932 MethodData* md = method_data();
1933 guarantee(md == NULL ||
1934 md->is_metadata(), "should be metadata");
1935 guarantee(md == NULL ||
1936 md->is_methodData(), "should be method data");
1937 }