Mercurial > hg > truffle
annotate src/share/vm/oops/methodOop.cpp @ 3241:6c9cec219ce4
7005865: Crash when running with PrintIRWithLIR
Summary: the failure is caused by uninitialized bci number
Reviewed-by: iveresov
author | vladidan |
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date | Mon, 11 Apr 2011 23:02:37 -0400 |
parents | 8033953d67ff |
children | ed69575596ac |
rev | line source |
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0 | 1 /* |
2142 | 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "code/debugInfoRec.hpp" | |
28 #include "gc_interface/collectedHeap.inline.hpp" | |
29 #include "interpreter/bytecodeStream.hpp" | |
30 #include "interpreter/bytecodeTracer.hpp" | |
31 #include "interpreter/bytecodes.hpp" | |
32 #include "interpreter/interpreter.hpp" | |
33 #include "interpreter/oopMapCache.hpp" | |
34 #include "memory/gcLocker.hpp" | |
35 #include "memory/generation.hpp" | |
36 #include "memory/oopFactory.hpp" | |
37 #include "oops/klassOop.hpp" | |
38 #include "oops/methodDataOop.hpp" | |
39 #include "oops/methodOop.hpp" | |
40 #include "oops/oop.inline.hpp" | |
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41 #include "oops/symbol.hpp" |
1972 | 42 #include "prims/jvmtiExport.hpp" |
43 #include "prims/methodHandleWalk.hpp" | |
44 #include "prims/nativeLookup.hpp" | |
45 #include "runtime/arguments.hpp" | |
46 #include "runtime/compilationPolicy.hpp" | |
47 #include "runtime/frame.inline.hpp" | |
48 #include "runtime/handles.inline.hpp" | |
49 #include "runtime/relocator.hpp" | |
50 #include "runtime/sharedRuntime.hpp" | |
51 #include "runtime/signature.hpp" | |
52 #include "utilities/xmlstream.hpp" | |
0 | 53 |
54 | |
55 // Implementation of methodOopDesc | |
56 | |
57 address methodOopDesc::get_i2c_entry() { | |
58 assert(_adapter != NULL, "must have"); | |
59 return _adapter->get_i2c_entry(); | |
60 } | |
61 | |
62 address methodOopDesc::get_c2i_entry() { | |
63 assert(_adapter != NULL, "must have"); | |
64 return _adapter->get_c2i_entry(); | |
65 } | |
66 | |
67 address methodOopDesc::get_c2i_unverified_entry() { | |
68 assert(_adapter != NULL, "must have"); | |
69 return _adapter->get_c2i_unverified_entry(); | |
70 } | |
71 | |
72 char* methodOopDesc::name_and_sig_as_C_string() { | |
73 return name_and_sig_as_C_string(Klass::cast(constants()->pool_holder()), name(), signature()); | |
74 } | |
75 | |
76 char* methodOopDesc::name_and_sig_as_C_string(char* buf, int size) { | |
77 return name_and_sig_as_C_string(Klass::cast(constants()->pool_holder()), name(), signature(), buf, size); | |
78 } | |
79 | |
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80 char* methodOopDesc::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature) { |
0 | 81 const char* klass_name = klass->external_name(); |
82 int klass_name_len = (int)strlen(klass_name); | |
83 int method_name_len = method_name->utf8_length(); | |
84 int len = klass_name_len + 1 + method_name_len + signature->utf8_length(); | |
85 char* dest = NEW_RESOURCE_ARRAY(char, len + 1); | |
86 strcpy(dest, klass_name); | |
87 dest[klass_name_len] = '.'; | |
88 strcpy(&dest[klass_name_len + 1], method_name->as_C_string()); | |
89 strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string()); | |
90 dest[len] = 0; | |
91 return dest; | |
92 } | |
93 | |
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94 char* methodOopDesc::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size) { |
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95 Symbol* klass_name = klass->name(); |
0 | 96 klass_name->as_klass_external_name(buf, size); |
97 int len = (int)strlen(buf); | |
98 | |
99 if (len < size - 1) { | |
100 buf[len++] = '.'; | |
101 | |
102 method_name->as_C_string(&(buf[len]), size - len); | |
103 len = (int)strlen(buf); | |
104 | |
105 signature->as_C_string(&(buf[len]), size - len); | |
106 } | |
107 | |
108 return buf; | |
109 } | |
110 | |
111 int methodOopDesc::fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS) { | |
112 // exception table holds quadruple entries of the form (beg_bci, end_bci, handler_bci, klass_index) | |
113 const int beg_bci_offset = 0; | |
114 const int end_bci_offset = 1; | |
115 const int handler_bci_offset = 2; | |
116 const int klass_index_offset = 3; | |
117 const int entry_size = 4; | |
118 // access exception table | |
119 typeArrayHandle table (THREAD, constMethod()->exception_table()); | |
120 int length = table->length(); | |
121 assert(length % entry_size == 0, "exception table format has changed"); | |
122 // iterate through all entries sequentially | |
123 constantPoolHandle pool(THREAD, constants()); | |
124 for (int i = 0; i < length; i += entry_size) { | |
125 int beg_bci = table->int_at(i + beg_bci_offset); | |
126 int end_bci = table->int_at(i + end_bci_offset); | |
127 assert(beg_bci <= end_bci, "inconsistent exception table"); | |
128 if (beg_bci <= throw_bci && throw_bci < end_bci) { | |
129 // exception handler bci range covers throw_bci => investigate further | |
130 int handler_bci = table->int_at(i + handler_bci_offset); | |
131 int klass_index = table->int_at(i + klass_index_offset); | |
132 if (klass_index == 0) { | |
133 return handler_bci; | |
134 } else if (ex_klass.is_null()) { | |
135 return handler_bci; | |
136 } else { | |
137 // we know the exception class => get the constraint class | |
138 // this may require loading of the constraint class; if verification | |
139 // fails or some other exception occurs, return handler_bci | |
140 klassOop k = pool->klass_at(klass_index, CHECK_(handler_bci)); | |
141 KlassHandle klass = KlassHandle(THREAD, k); | |
142 assert(klass.not_null(), "klass not loaded"); | |
143 if (ex_klass->is_subtype_of(klass())) { | |
144 return handler_bci; | |
145 } | |
146 } | |
147 } | |
148 } | |
149 | |
150 return -1; | |
151 } | |
152 | |
153 void methodOopDesc::mask_for(int bci, InterpreterOopMap* mask) { | |
154 | |
155 Thread* myThread = Thread::current(); | |
156 methodHandle h_this(myThread, this); | |
157 #ifdef ASSERT | |
158 bool has_capability = myThread->is_VM_thread() || | |
159 myThread->is_ConcurrentGC_thread() || | |
160 myThread->is_GC_task_thread(); | |
161 | |
162 if (!has_capability) { | |
163 if (!VerifyStack && !VerifyLastFrame) { | |
164 // verify stack calls this outside VM thread | |
165 warning("oopmap should only be accessed by the " | |
166 "VM, GC task or CMS threads (or during debugging)"); | |
167 InterpreterOopMap local_mask; | |
168 instanceKlass::cast(method_holder())->mask_for(h_this, bci, &local_mask); | |
169 local_mask.print(); | |
170 } | |
171 } | |
172 #endif | |
173 instanceKlass::cast(method_holder())->mask_for(h_this, bci, mask); | |
174 return; | |
175 } | |
176 | |
177 | |
178 int methodOopDesc::bci_from(address bcp) const { | |
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179 assert(is_native() && bcp == code_base() || contains(bcp) || is_error_reported(), "bcp doesn't belong to this method"); |
0 | 180 return bcp - code_base(); |
181 } | |
182 | |
183 | |
184 // Return (int)bcx if it appears to be a valid BCI. | |
185 // Return bci_from((address)bcx) if it appears to be a valid BCP. | |
186 // Return -1 otherwise. | |
187 // Used by profiling code, when invalid data is a possibility. | |
188 // The caller is responsible for validating the methodOop itself. | |
189 int methodOopDesc::validate_bci_from_bcx(intptr_t bcx) const { | |
190 // keep bci as -1 if not a valid bci | |
191 int bci = -1; | |
192 if (bcx == 0 || (address)bcx == code_base()) { | |
193 // code_size() may return 0 and we allow 0 here | |
194 // the method may be native | |
195 bci = 0; | |
196 } else if (frame::is_bci(bcx)) { | |
197 if (bcx < code_size()) { | |
198 bci = (int)bcx; | |
199 } | |
200 } else if (contains((address)bcx)) { | |
201 bci = (address)bcx - code_base(); | |
202 } | |
203 // Assert that if we have dodged any asserts, bci is negative. | |
204 assert(bci == -1 || bci == bci_from(bcp_from(bci)), "sane bci if >=0"); | |
205 return bci; | |
206 } | |
207 | |
208 address methodOopDesc::bcp_from(int bci) const { | |
209 assert((is_native() && bci == 0) || (!is_native() && 0 <= bci && bci < code_size()), "illegal bci"); | |
210 address bcp = code_base() + bci; | |
211 assert(is_native() && bcp == code_base() || contains(bcp), "bcp doesn't belong to this method"); | |
212 return bcp; | |
213 } | |
214 | |
215 | |
216 int methodOopDesc::object_size(bool is_native) { | |
217 // If native, then include pointers for native_function and signature_handler | |
218 int extra_bytes = (is_native) ? 2*sizeof(address*) : 0; | |
219 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; | |
220 return align_object_size(header_size() + extra_words); | |
221 } | |
222 | |
223 | |
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224 Symbol* methodOopDesc::klass_name() const { |
0 | 225 klassOop k = method_holder(); |
226 assert(k->is_klass(), "must be klass"); | |
227 instanceKlass* ik = (instanceKlass*) k->klass_part(); | |
228 return ik->name(); | |
229 } | |
230 | |
231 | |
232 void methodOopDesc::set_interpreter_kind() { | |
233 int kind = Interpreter::method_kind(methodOop(this)); | |
234 assert(kind != Interpreter::invalid, | |
235 "interpreter entry must be valid"); | |
236 set_interpreter_kind(kind); | |
237 } | |
238 | |
239 | |
240 // Attempt to return method oop to original state. Clear any pointers | |
241 // (to objects outside the shared spaces). We won't be able to predict | |
242 // where they should point in a new JVM. Further initialize some | |
243 // entries now in order allow them to be write protected later. | |
244 | |
245 void methodOopDesc::remove_unshareable_info() { | |
246 unlink_method(); | |
247 set_interpreter_kind(); | |
248 } | |
249 | |
250 | |
1783 | 251 bool methodOopDesc::was_executed_more_than(int n) { |
0 | 252 // Invocation counter is reset when the methodOop is compiled. |
253 // If the method has compiled code we therefore assume it has | |
254 // be excuted more than n times. | |
255 if (is_accessor() || is_empty_method() || (code() != NULL)) { | |
256 // interpreter doesn't bump invocation counter of trivial methods | |
257 // compiler does not bump invocation counter of compiled methods | |
258 return true; | |
1783 | 259 } |
260 else if (_invocation_counter.carry() || (method_data() != NULL && method_data()->invocation_counter()->carry())) { | |
0 | 261 // The carry bit is set when the counter overflows and causes |
262 // a compilation to occur. We don't know how many times | |
263 // the counter has been reset, so we simply assume it has | |
264 // been executed more than n times. | |
265 return true; | |
266 } else { | |
267 return invocation_count() > n; | |
268 } | |
269 } | |
270 | |
271 #ifndef PRODUCT | |
1783 | 272 void methodOopDesc::print_invocation_count() { |
0 | 273 if (is_static()) tty->print("static "); |
274 if (is_final()) tty->print("final "); | |
275 if (is_synchronized()) tty->print("synchronized "); | |
276 if (is_native()) tty->print("native "); | |
277 method_holder()->klass_part()->name()->print_symbol_on(tty); | |
278 tty->print("."); | |
279 name()->print_symbol_on(tty); | |
280 signature()->print_symbol_on(tty); | |
281 | |
282 if (WizardMode) { | |
283 // dump the size of the byte codes | |
284 tty->print(" {%d}", code_size()); | |
285 } | |
286 tty->cr(); | |
287 | |
288 tty->print_cr (" interpreter_invocation_count: %8d ", interpreter_invocation_count()); | |
289 tty->print_cr (" invocation_counter: %8d ", invocation_count()); | |
290 tty->print_cr (" backedge_counter: %8d ", backedge_count()); | |
291 if (CountCompiledCalls) { | |
292 tty->print_cr (" compiled_invocation_count: %8d ", compiled_invocation_count()); | |
293 } | |
294 | |
295 } | |
296 #endif | |
297 | |
298 // Build a methodDataOop object to hold information about this method | |
299 // collected in the interpreter. | |
300 void methodOopDesc::build_interpreter_method_data(methodHandle method, TRAPS) { | |
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301 // Do not profile method if current thread holds the pending list lock, |
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302 // which avoids deadlock for acquiring the MethodData_lock. |
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303 if (instanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) { |
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304 return; |
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305 } |
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306 |
0 | 307 // Grab a lock here to prevent multiple |
308 // methodDataOops from being created. | |
309 MutexLocker ml(MethodData_lock, THREAD); | |
310 if (method->method_data() == NULL) { | |
311 methodDataOop method_data = oopFactory::new_methodData(method, CHECK); | |
312 method->set_method_data(method_data); | |
313 if (PrintMethodData && (Verbose || WizardMode)) { | |
314 ResourceMark rm(THREAD); | |
315 tty->print("build_interpreter_method_data for "); | |
316 method->print_name(tty); | |
317 tty->cr(); | |
318 // At the end of the run, the MDO, full of data, will be dumped. | |
319 } | |
320 } | |
321 } | |
322 | |
323 void methodOopDesc::cleanup_inline_caches() { | |
324 // The current system doesn't use inline caches in the interpreter | |
325 // => nothing to do (keep this method around for future use) | |
326 } | |
327 | |
328 | |
710 | 329 int methodOopDesc::extra_stack_words() { |
330 // not an inline function, to avoid a header dependency on Interpreter | |
1506 | 331 return extra_stack_entries() * Interpreter::stackElementSize; |
710 | 332 } |
333 | |
334 | |
0 | 335 void methodOopDesc::compute_size_of_parameters(Thread *thread) { |
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336 ArgumentSizeComputer asc(signature()); |
0 | 337 set_size_of_parameters(asc.size() + (is_static() ? 0 : 1)); |
338 } | |
339 | |
340 #ifdef CC_INTERP | |
341 void methodOopDesc::set_result_index(BasicType type) { | |
342 _result_index = Interpreter::BasicType_as_index(type); | |
343 } | |
344 #endif | |
345 | |
346 BasicType methodOopDesc::result_type() const { | |
347 ResultTypeFinder rtf(signature()); | |
348 return rtf.type(); | |
349 } | |
350 | |
351 | |
352 bool methodOopDesc::is_empty_method() const { | |
353 return code_size() == 1 | |
354 && *code_base() == Bytecodes::_return; | |
355 } | |
356 | |
357 | |
358 bool methodOopDesc::is_vanilla_constructor() const { | |
359 // Returns true if this method is a vanilla constructor, i.e. an "<init>" "()V" method | |
360 // which only calls the superclass vanilla constructor and possibly does stores of | |
361 // zero constants to local fields: | |
362 // | |
363 // aload_0 | |
364 // invokespecial | |
365 // indexbyte1 | |
366 // indexbyte2 | |
367 // | |
368 // followed by an (optional) sequence of: | |
369 // | |
370 // aload_0 | |
371 // aconst_null / iconst_0 / fconst_0 / dconst_0 | |
372 // putfield | |
373 // indexbyte1 | |
374 // indexbyte2 | |
375 // | |
376 // followed by: | |
377 // | |
378 // return | |
379 | |
380 assert(name() == vmSymbols::object_initializer_name(), "Should only be called for default constructors"); | |
381 assert(signature() == vmSymbols::void_method_signature(), "Should only be called for default constructors"); | |
382 int size = code_size(); | |
383 // Check if size match | |
384 if (size == 0 || size % 5 != 0) return false; | |
385 address cb = code_base(); | |
386 int last = size - 1; | |
387 if (cb[0] != Bytecodes::_aload_0 || cb[1] != Bytecodes::_invokespecial || cb[last] != Bytecodes::_return) { | |
388 // Does not call superclass default constructor | |
389 return false; | |
390 } | |
391 // Check optional sequence | |
392 for (int i = 4; i < last; i += 5) { | |
393 if (cb[i] != Bytecodes::_aload_0) return false; | |
394 if (!Bytecodes::is_zero_const(Bytecodes::cast(cb[i+1]))) return false; | |
395 if (cb[i+2] != Bytecodes::_putfield) return false; | |
396 } | |
397 return true; | |
398 } | |
399 | |
400 | |
401 bool methodOopDesc::compute_has_loops_flag() { | |
402 BytecodeStream bcs(methodOop(this)); | |
403 Bytecodes::Code bc; | |
404 | |
405 while ((bc = bcs.next()) >= 0) { | |
406 switch( bc ) { | |
407 case Bytecodes::_ifeq: | |
408 case Bytecodes::_ifnull: | |
409 case Bytecodes::_iflt: | |
410 case Bytecodes::_ifle: | |
411 case Bytecodes::_ifne: | |
412 case Bytecodes::_ifnonnull: | |
413 case Bytecodes::_ifgt: | |
414 case Bytecodes::_ifge: | |
415 case Bytecodes::_if_icmpeq: | |
416 case Bytecodes::_if_icmpne: | |
417 case Bytecodes::_if_icmplt: | |
418 case Bytecodes::_if_icmpgt: | |
419 case Bytecodes::_if_icmple: | |
420 case Bytecodes::_if_icmpge: | |
421 case Bytecodes::_if_acmpeq: | |
422 case Bytecodes::_if_acmpne: | |
423 case Bytecodes::_goto: | |
424 case Bytecodes::_jsr: | |
425 if( bcs.dest() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
426 break; | |
427 | |
428 case Bytecodes::_goto_w: | |
429 case Bytecodes::_jsr_w: | |
430 if( bcs.dest_w() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
431 break; | |
432 } | |
433 } | |
434 _access_flags.set_loops_flag_init(); | |
435 return _access_flags.has_loops(); | |
436 } | |
437 | |
438 | |
439 bool methodOopDesc::is_final_method() const { | |
440 // %%% Should return true for private methods also, | |
441 // since there is no way to override them. | |
442 return is_final() || Klass::cast(method_holder())->is_final(); | |
443 } | |
444 | |
445 | |
446 bool methodOopDesc::is_strict_method() const { | |
447 return is_strict(); | |
448 } | |
449 | |
450 | |
451 bool methodOopDesc::can_be_statically_bound() const { | |
452 if (is_final_method()) return true; | |
453 return vtable_index() == nonvirtual_vtable_index; | |
454 } | |
455 | |
456 | |
457 bool methodOopDesc::is_accessor() const { | |
458 if (code_size() != 5) return false; | |
459 if (size_of_parameters() != 1) return false; | |
2142 | 460 if (java_code_at(0) != Bytecodes::_aload_0 ) return false; |
461 if (java_code_at(1) != Bytecodes::_getfield) return false; | |
462 if (java_code_at(4) != Bytecodes::_areturn && | |
463 java_code_at(4) != Bytecodes::_ireturn ) return false; | |
0 | 464 return true; |
465 } | |
466 | |
467 | |
468 bool methodOopDesc::is_initializer() const { | |
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469 return name() == vmSymbols::object_initializer_name() || is_static_initializer(); |
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470 } |
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471 |
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472 bool methodOopDesc::has_valid_initializer_flags() const { |
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473 return (is_static() || |
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474 instanceKlass::cast(method_holder())->major_version() < 51); |
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475 } |
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476 |
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477 bool methodOopDesc::is_static_initializer() const { |
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478 // For classfiles version 51 or greater, ensure that the clinit method is |
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479 // static. Non-static methods with the name "<clinit>" are not static |
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480 // initializers. (older classfiles exempted for backward compatibility) |
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481 return name() == vmSymbols::class_initializer_name() && |
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482 has_valid_initializer_flags(); |
0 | 483 } |
484 | |
485 | |
486 objArrayHandle methodOopDesc::resolved_checked_exceptions_impl(methodOop this_oop, TRAPS) { | |
487 int length = this_oop->checked_exceptions_length(); | |
488 if (length == 0) { // common case | |
489 return objArrayHandle(THREAD, Universe::the_empty_class_klass_array()); | |
490 } else { | |
491 methodHandle h_this(THREAD, this_oop); | |
1142 | 492 objArrayOop m_oop = oopFactory::new_objArray(SystemDictionary::Class_klass(), length, CHECK_(objArrayHandle())); |
0 | 493 objArrayHandle mirrors (THREAD, m_oop); |
494 for (int i = 0; i < length; i++) { | |
495 CheckedExceptionElement* table = h_this->checked_exceptions_start(); // recompute on each iteration, not gc safe | |
496 klassOop k = h_this->constants()->klass_at(table[i].class_cp_index, CHECK_(objArrayHandle())); | |
1142 | 497 assert(Klass::cast(k)->is_subclass_of(SystemDictionary::Throwable_klass()), "invalid exception class"); |
0 | 498 mirrors->obj_at_put(i, Klass::cast(k)->java_mirror()); |
499 } | |
500 return mirrors; | |
501 } | |
502 }; | |
503 | |
504 | |
505 int methodOopDesc::line_number_from_bci(int bci) const { | |
506 if (bci == SynchronizationEntryBCI) bci = 0; | |
507 assert(bci == 0 || 0 <= bci && bci < code_size(), "illegal bci"); | |
508 int best_bci = 0; | |
509 int best_line = -1; | |
510 | |
511 if (has_linenumber_table()) { | |
512 // The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
513 // Not necessarily sorted and not necessarily one-to-one. | |
514 CompressedLineNumberReadStream stream(compressed_linenumber_table()); | |
515 while (stream.read_pair()) { | |
516 if (stream.bci() == bci) { | |
517 // perfect match | |
518 return stream.line(); | |
519 } else { | |
520 // update best_bci/line | |
521 if (stream.bci() < bci && stream.bci() >= best_bci) { | |
522 best_bci = stream.bci(); | |
523 best_line = stream.line(); | |
524 } | |
525 } | |
526 } | |
527 } | |
528 return best_line; | |
529 } | |
530 | |
531 | |
532 bool methodOopDesc::is_klass_loaded_by_klass_index(int klass_index) const { | |
533 if( _constants->tag_at(klass_index).is_unresolved_klass() ) { | |
534 Thread *thread = Thread::current(); | |
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535 Symbol* klass_name = _constants->klass_name_at(klass_index); |
0 | 536 Handle loader(thread, instanceKlass::cast(method_holder())->class_loader()); |
537 Handle prot (thread, Klass::cast(method_holder())->protection_domain()); | |
538 return SystemDictionary::find(klass_name, loader, prot, thread) != NULL; | |
539 } else { | |
540 return true; | |
541 } | |
542 } | |
543 | |
544 | |
545 bool methodOopDesc::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { | |
546 int klass_index = _constants->klass_ref_index_at(refinfo_index); | |
547 if (must_be_resolved) { | |
548 // Make sure klass is resolved in constantpool. | |
549 if (constants()->tag_at(klass_index).is_unresolved_klass()) return false; | |
550 } | |
551 return is_klass_loaded_by_klass_index(klass_index); | |
552 } | |
553 | |
554 | |
555 void methodOopDesc::set_native_function(address function, bool post_event_flag) { | |
556 assert(function != NULL, "use clear_native_function to unregister natives"); | |
557 address* native_function = native_function_addr(); | |
558 | |
559 // We can see racers trying to place the same native function into place. Once | |
560 // is plenty. | |
561 address current = *native_function; | |
562 if (current == function) return; | |
563 if (post_event_flag && JvmtiExport::should_post_native_method_bind() && | |
564 function != NULL) { | |
565 // native_method_throw_unsatisfied_link_error_entry() should only | |
566 // be passed when post_event_flag is false. | |
567 assert(function != | |
568 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
569 "post_event_flag mis-match"); | |
570 | |
571 // post the bind event, and possible change the bind function | |
572 JvmtiExport::post_native_method_bind(this, &function); | |
573 } | |
574 *native_function = function; | |
575 // This function can be called more than once. We must make sure that we always | |
576 // use the latest registered method -> check if a stub already has been generated. | |
577 // If so, we have to make it not_entrant. | |
578 nmethod* nm = code(); // Put it into local variable to guard against concurrent updates | |
579 if (nm != NULL) { | |
580 nm->make_not_entrant(); | |
581 } | |
582 } | |
583 | |
584 | |
585 bool methodOopDesc::has_native_function() const { | |
586 address func = native_function(); | |
587 return (func != NULL && func != SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); | |
588 } | |
589 | |
590 | |
591 void methodOopDesc::clear_native_function() { | |
592 set_native_function( | |
593 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
594 !native_bind_event_is_interesting); | |
595 clear_code(); | |
596 } | |
597 | |
598 | |
599 void methodOopDesc::set_signature_handler(address handler) { | |
600 address* signature_handler = signature_handler_addr(); | |
601 *signature_handler = handler; | |
602 } | |
603 | |
604 | |
605 bool methodOopDesc::is_not_compilable(int comp_level) const { | |
710 | 606 if (is_method_handle_invoke()) { |
607 // compilers must recognize this method specially, or not at all | |
608 return true; | |
609 } | |
1783 | 610 if (number_of_breakpoints() > 0) { |
611 return true; | |
612 } | |
613 if (comp_level == CompLevel_any) { | |
614 return is_not_c1_compilable() || is_not_c2_compilable(); | |
0 | 615 } |
1783 | 616 if (is_c1_compile(comp_level)) { |
617 return is_not_c1_compilable(); | |
618 } | |
619 if (is_c2_compile(comp_level)) { | |
620 return is_not_c2_compilable(); | |
621 } | |
622 return false; | |
0 | 623 } |
624 | |
625 // call this when compiler finds that this method is not compilable | |
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626 void methodOopDesc::set_not_compilable(int comp_level, bool report) { |
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627 if (PrintCompilation && report) { |
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628 ttyLocker ttyl; |
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629 tty->print("made not compilable "); |
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630 this->print_short_name(tty); |
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631 int size = this->code_size(); |
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632 if (size > 0) |
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633 tty->print(" (%d bytes)", size); |
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634 tty->cr(); |
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635 } |
0 | 636 if ((TraceDeoptimization || LogCompilation) && (xtty != NULL)) { |
637 ttyLocker ttyl; | |
638 xtty->begin_elem("make_not_compilable thread='%d'", (int) os::current_thread_id()); | |
639 xtty->method(methodOop(this)); | |
640 xtty->stamp(); | |
641 xtty->end_elem(); | |
642 } | |
1783 | 643 if (comp_level == CompLevel_all) { |
644 set_not_c1_compilable(); | |
645 set_not_c2_compilable(); | |
646 } else { | |
647 if (is_c1_compile(comp_level)) { | |
648 set_not_c1_compilable(); | |
649 } else | |
650 if (is_c2_compile(comp_level)) { | |
651 set_not_c2_compilable(); | |
652 } | |
0 | 653 } |
1783 | 654 CompilationPolicy::policy()->disable_compilation(this); |
0 | 655 } |
656 | |
657 // Revert to using the interpreter and clear out the nmethod | |
658 void methodOopDesc::clear_code() { | |
659 | |
660 // this may be NULL if c2i adapters have not been made yet | |
661 // Only should happen at allocate time. | |
662 if (_adapter == NULL) { | |
663 _from_compiled_entry = NULL; | |
664 } else { | |
665 _from_compiled_entry = _adapter->get_c2i_entry(); | |
666 } | |
667 OrderAccess::storestore(); | |
668 _from_interpreted_entry = _i2i_entry; | |
669 OrderAccess::storestore(); | |
670 _code = NULL; | |
671 } | |
672 | |
673 // Called by class data sharing to remove any entry points (which are not shared) | |
674 void methodOopDesc::unlink_method() { | |
675 _code = NULL; | |
676 _i2i_entry = NULL; | |
677 _from_interpreted_entry = NULL; | |
678 if (is_native()) { | |
679 *native_function_addr() = NULL; | |
680 set_signature_handler(NULL); | |
681 } | |
682 NOT_PRODUCT(set_compiled_invocation_count(0);) | |
683 invocation_counter()->reset(); | |
684 backedge_counter()->reset(); | |
685 _adapter = NULL; | |
686 _from_compiled_entry = NULL; | |
687 assert(_method_data == NULL, "unexpected method data?"); | |
688 set_method_data(NULL); | |
689 set_interpreter_throwout_count(0); | |
690 set_interpreter_invocation_count(0); | |
691 } | |
692 | |
693 // Called when the method_holder is getting linked. Setup entrypoints so the method | |
694 // is ready to be called from interpreter, compiler, and vtables. | |
695 void methodOopDesc::link_method(methodHandle h_method, TRAPS) { | |
696 assert(_i2i_entry == NULL, "should only be called once"); | |
697 assert(_adapter == NULL, "init'd to NULL" ); | |
698 assert( _code == NULL, "nothing compiled yet" ); | |
699 | |
700 // Setup interpreter entrypoint | |
701 assert(this == h_method(), "wrong h_method()" ); | |
702 address entry = Interpreter::entry_for_method(h_method); | |
703 assert(entry != NULL, "interpreter entry must be non-null"); | |
704 // Sets both _i2i_entry and _from_interpreted_entry | |
705 set_interpreter_entry(entry); | |
710 | 706 if (is_native() && !is_method_handle_invoke()) { |
0 | 707 set_native_function( |
708 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
709 !native_bind_event_is_interesting); | |
710 } | |
711 | |
712 // Setup compiler entrypoint. This is made eagerly, so we do not need | |
713 // special handling of vtables. An alternative is to make adapters more | |
714 // lazily by calling make_adapter() from from_compiled_entry() for the | |
715 // normal calls. For vtable calls life gets more complicated. When a | |
716 // call-site goes mega-morphic we need adapters in all methods which can be | |
717 // called from the vtable. We need adapters on such methods that get loaded | |
718 // later. Ditto for mega-morphic itable calls. If this proves to be a | |
719 // problem we'll make these lazily later. | |
720 (void) make_adapters(h_method, CHECK); | |
721 | |
722 // ONLY USE the h_method now as make_adapter may have blocked | |
723 | |
724 } | |
725 | |
726 address methodOopDesc::make_adapters(methodHandle mh, TRAPS) { | |
727 // Adapters for compiled code are made eagerly here. They are fairly | |
728 // small (generally < 100 bytes) and quick to make (and cached and shared) | |
729 // so making them eagerly shouldn't be too expensive. | |
730 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh); | |
731 if (adapter == NULL ) { | |
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732 THROW_MSG_NULL(vmSymbols::java_lang_VirtualMachineError(), "out of space in CodeCache for adapters"); |
0 | 733 } |
734 | |
735 mh->set_adapter_entry(adapter); | |
736 mh->_from_compiled_entry = adapter->get_c2i_entry(); | |
737 return adapter->get_c2i_entry(); | |
738 } | |
739 | |
740 // The verified_code_entry() must be called when a invoke is resolved | |
741 // on this method. | |
742 | |
743 // It returns the compiled code entry point, after asserting not null. | |
744 // This function is called after potential safepoints so that nmethod | |
745 // or adapter that it points to is still live and valid. | |
746 // This function must not hit a safepoint! | |
747 address methodOopDesc::verified_code_entry() { | |
748 debug_only(No_Safepoint_Verifier nsv;) | |
1202 | 749 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); |
750 if (code == NULL && UseCodeCacheFlushing) { | |
751 nmethod *saved_code = CodeCache::find_and_remove_saved_code(this); | |
752 if (saved_code != NULL) { | |
753 methodHandle method(this); | |
754 assert( ! saved_code->is_osr_method(), "should not get here for osr" ); | |
755 set_code( method, saved_code ); | |
756 } | |
757 } | |
758 | |
0 | 759 assert(_from_compiled_entry != NULL, "must be set"); |
760 return _from_compiled_entry; | |
761 } | |
762 | |
763 // Check that if an nmethod ref exists, it has a backlink to this or no backlink at all | |
764 // (could be racing a deopt). | |
765 // Not inline to avoid circular ref. | |
766 bool methodOopDesc::check_code() const { | |
767 // cached in a register or local. There's a race on the value of the field. | |
768 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); | |
769 return code == NULL || (code->method() == NULL) || (code->method() == (methodOop)this && !code->is_osr_method()); | |
770 } | |
771 | |
772 // Install compiled code. Instantly it can execute. | |
773 void methodOopDesc::set_code(methodHandle mh, nmethod *code) { | |
774 assert( code, "use clear_code to remove code" ); | |
775 assert( mh->check_code(), "" ); | |
776 | |
777 guarantee(mh->adapter() != NULL, "Adapter blob must already exist!"); | |
778 | |
779 // These writes must happen in this order, because the interpreter will | |
780 // directly jump to from_interpreted_entry which jumps to an i2c adapter | |
781 // which jumps to _from_compiled_entry. | |
782 mh->_code = code; // Assign before allowing compiled code to exec | |
783 | |
784 int comp_level = code->comp_level(); | |
785 // In theory there could be a race here. In practice it is unlikely | |
786 // and not worth worrying about. | |
1783 | 787 if (comp_level > mh->highest_comp_level()) { |
788 mh->set_highest_comp_level(comp_level); | |
0 | 789 } |
790 | |
791 OrderAccess::storestore(); | |
1692 | 792 #ifdef SHARK |
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793 mh->_from_interpreted_entry = code->insts_begin(); |
1692 | 794 #else |
0 | 795 mh->_from_compiled_entry = code->verified_entry_point(); |
796 OrderAccess::storestore(); | |
797 // Instantly compiled code can execute. | |
798 mh->_from_interpreted_entry = mh->get_i2c_entry(); | |
1692 | 799 #endif // SHARK |
0 | 800 |
801 } | |
802 | |
803 | |
804 bool methodOopDesc::is_overridden_in(klassOop k) const { | |
805 instanceKlass* ik = instanceKlass::cast(k); | |
806 | |
807 if (ik->is_interface()) return false; | |
808 | |
809 // If method is an interface, we skip it - except if it | |
810 // is a miranda method | |
811 if (instanceKlass::cast(method_holder())->is_interface()) { | |
812 // Check that method is not a miranda method | |
813 if (ik->lookup_method(name(), signature()) == NULL) { | |
814 // No implementation exist - so miranda method | |
815 return false; | |
816 } | |
817 return true; | |
818 } | |
819 | |
820 assert(ik->is_subclass_of(method_holder()), "should be subklass"); | |
821 assert(ik->vtable() != NULL, "vtable should exist"); | |
822 if (vtable_index() == nonvirtual_vtable_index) { | |
823 return false; | |
824 } else { | |
825 methodOop vt_m = ik->method_at_vtable(vtable_index()); | |
826 return vt_m != methodOop(this); | |
827 } | |
828 } | |
829 | |
830 | |
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831 // give advice about whether this methodOop should be cached or not |
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832 bool methodOopDesc::should_not_be_cached() const { |
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833 if (is_old()) { |
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834 // This method has been redefined. It is either EMCP or obsolete |
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835 // and we don't want to cache it because that would pin the method |
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836 // down and prevent it from being collectible if and when it |
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837 // finishes executing. |
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838 return true; |
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839 } |
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840 |
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841 if (mark()->should_not_be_cached()) { |
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842 // It is either not safe or not a good idea to cache this |
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843 // method at this time because of the state of the embedded |
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844 // markOop. See markOop.cpp for the gory details. |
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845 return true; |
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846 } |
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847 |
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848 // caching this method should be just fine |
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849 return false; |
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850 } |
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851 |
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852 bool methodOopDesc::is_method_handle_invoke_name(vmSymbols::SID name_sid) { |
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853 switch (name_sid) { |
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854 case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeExact_name): |
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855 case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeGeneric_name): |
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856 return true; |
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857 } |
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858 if ((AllowTransitionalJSR292 || AllowInvokeForInvokeGeneric) |
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859 && name_sid == vmSymbols::VM_SYMBOL_ENUM_NAME(invoke_name)) |
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860 return true; |
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861 return false; |
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862 } |
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863 |
710 | 864 // Constant pool structure for invoke methods: |
865 enum { | |
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866 _imcp_invoke_name = 1, // utf8: 'invokeExact' or 'invokeGeneric' |
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867 _imcp_invoke_signature, // utf8: (variable Symbol*) |
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868 _imcp_method_type_value, // string: (variable java/lang/invoke/MethodType, sic) |
710 | 869 _imcp_limit |
870 }; | |
871 | |
872 oop methodOopDesc::method_handle_type() const { | |
873 if (!is_method_handle_invoke()) { assert(false, "caller resp."); return NULL; } | |
874 oop mt = constants()->resolved_string_at(_imcp_method_type_value); | |
875 assert(mt->klass() == SystemDictionary::MethodType_klass(), ""); | |
876 return mt; | |
877 } | |
878 | |
879 jint* methodOopDesc::method_type_offsets_chain() { | |
880 static jint pchase[] = { -1, -1, -1 }; | |
881 if (pchase[0] == -1) { | |
882 jint step0 = in_bytes(constants_offset()); | |
883 jint step1 = (constantPoolOopDesc::header_size() + _imcp_method_type_value) * HeapWordSize; | |
884 // do this in reverse to avoid races: | |
885 OrderAccess::release_store(&pchase[1], step1); | |
886 OrderAccess::release_store(&pchase[0], step0); | |
887 } | |
888 return pchase; | |
889 } | |
890 | |
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891 //------------------------------------------------------------------------------ |
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892 // methodOopDesc::is_method_handle_adapter |
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893 // |
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894 // Tests if this method is an internal adapter frame from the |
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895 // MethodHandleCompiler. |
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896 // Must be consistent with MethodHandleCompiler::get_method_oop(). |
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897 bool methodOopDesc::is_method_handle_adapter() const { |
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898 if (is_synthetic() && |
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899 !is_native() && // has code from MethodHandleCompiler |
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900 is_method_handle_invoke_name(name()) && |
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901 MethodHandleCompiler::klass_is_method_handle_adapter_holder(method_holder())) { |
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902 assert(!is_method_handle_invoke(), "disjoint"); |
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903 return true; |
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904 } else { |
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905 return false; |
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906 } |
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907 } |
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908 |
710 | 909 methodHandle methodOopDesc::make_invoke_method(KlassHandle holder, |
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910 Symbol* name, |
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911 Symbol* signature, |
710 | 912 Handle method_type, TRAPS) { |
913 methodHandle empty; | |
914 | |
915 assert(holder() == SystemDictionary::MethodHandle_klass(), | |
916 "must be a JSR 292 magic type"); | |
917 | |
918 if (TraceMethodHandles) { | |
919 tty->print("Creating invoke method for "); | |
920 signature->print_value(); | |
921 tty->cr(); | |
922 } | |
923 | |
924 constantPoolHandle cp; | |
925 { | |
926 constantPoolOop cp_oop = oopFactory::new_constantPool(_imcp_limit, IsSafeConc, CHECK_(empty)); | |
927 cp = constantPoolHandle(THREAD, cp_oop); | |
928 } | |
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929 cp->symbol_at_put(_imcp_invoke_name, name); |
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930 cp->symbol_at_put(_imcp_invoke_signature, signature); |
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931 cp->string_at_put(_imcp_method_type_value, Universe::the_null_string()); |
710 | 932 cp->set_pool_holder(holder()); |
933 | |
934 // set up the fancy stuff: | |
935 cp->pseudo_string_at_put(_imcp_method_type_value, method_type()); | |
936 methodHandle m; | |
937 { | |
938 int flags_bits = (JVM_MH_INVOKE_BITS | JVM_ACC_PUBLIC | JVM_ACC_FINAL); | |
939 methodOop m_oop = oopFactory::new_method(0, accessFlags_from(flags_bits), | |
940 0, 0, 0, IsSafeConc, CHECK_(empty)); | |
941 m = methodHandle(THREAD, m_oop); | |
942 } | |
943 m->set_constants(cp()); | |
944 m->set_name_index(_imcp_invoke_name); | |
945 m->set_signature_index(_imcp_invoke_signature); | |
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946 assert(is_method_handle_invoke_name(m->name()), ""); |
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947 assert(m->signature() == signature, ""); |
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948 assert(m->is_method_handle_invoke(), ""); |
710 | 949 #ifdef CC_INTERP |
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950 ResultTypeFinder rtf(signature); |
710 | 951 m->set_result_index(rtf.type()); |
952 #endif | |
953 m->compute_size_of_parameters(THREAD); | |
954 m->set_exception_table(Universe::the_empty_int_array()); | |
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955 m->init_intrinsic_id(); |
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956 assert(m->intrinsic_id() == vmIntrinsics::_invokeExact || |
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957 m->intrinsic_id() == vmIntrinsics::_invokeGeneric, "must be an invoker"); |
710 | 958 |
959 // Finally, set up its entry points. | |
960 assert(m->method_handle_type() == method_type(), ""); | |
961 assert(m->can_be_statically_bound(), ""); | |
962 m->set_vtable_index(methodOopDesc::nonvirtual_vtable_index); | |
963 m->link_method(m, CHECK_(empty)); | |
964 | |
965 #ifdef ASSERT | |
966 // Make sure the pointer chase works. | |
967 address p = (address) m(); | |
968 for (jint* pchase = method_type_offsets_chain(); (*pchase) != -1; pchase++) { | |
969 p = *(address*)(p + (*pchase)); | |
970 } | |
971 assert((oop)p == method_type(), "pointer chase is correct"); | |
972 #endif | |
973 | |
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974 if (TraceMethodHandles && (Verbose || WizardMode)) |
710 | 975 m->print_on(tty); |
976 | |
977 return m; | |
978 } | |
979 | |
980 | |
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981 |
0 | 982 methodHandle methodOopDesc:: clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, |
983 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS) { | |
984 // Code below does not work for native methods - they should never get rewritten anyway | |
985 assert(!m->is_native(), "cannot rewrite native methods"); | |
986 // Allocate new methodOop | |
987 AccessFlags flags = m->access_flags(); | |
988 int checked_exceptions_len = m->checked_exceptions_length(); | |
989 int localvariable_len = m->localvariable_table_length(); | |
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990 // Allocate newm_oop with the is_conc_safe parameter set |
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991 // to IsUnsafeConc to indicate that newm_oop is not yet |
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992 // safe for concurrent processing by a GC. |
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993 methodOop newm_oop = oopFactory::new_method(new_code_length, |
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994 flags, |
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995 new_compressed_linenumber_size, |
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996 localvariable_len, |
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997 checked_exceptions_len, |
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998 IsUnsafeConc, |
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999 CHECK_(methodHandle())); |
0 | 1000 methodHandle newm (THREAD, newm_oop); |
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1001 NOT_PRODUCT(int nmsz = newm->is_parsable() ? newm->size() : -1;) |
0 | 1002 int new_method_size = newm->method_size(); |
1003 // Create a shallow copy of methodOopDesc part, but be careful to preserve the new constMethodOop | |
1004 constMethodOop newcm = newm->constMethod(); | |
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1005 NOT_PRODUCT(int ncmsz = newcm->is_parsable() ? newcm->size() : -1;) |
0 | 1006 int new_const_method_size = newm->constMethod()->object_size(); |
518
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1007 |
0 | 1008 memcpy(newm(), m(), sizeof(methodOopDesc)); |
1009 // Create shallow copy of constMethodOopDesc, but be careful to preserve the methodOop | |
518
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1010 // is_conc_safe is set to false because that is the value of |
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1011 // is_conc_safe initialzied into newcm and the copy should |
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1012 // not overwrite that value. During the window during which it is |
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1013 // tagged as unsafe, some extra work could be needed during precleaning |
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1014 // or concurrent marking but those phases will be correct. Setting and |
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1015 // resetting is done in preference to a careful copying into newcm to |
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1016 // avoid having to know the precise layout of a constMethodOop. |
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1017 m->constMethod()->set_is_conc_safe(oopDesc::IsUnsafeConc); |
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1018 assert(m->constMethod()->is_parsable(), "Should remain parsable"); |
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1019 |
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1020 // NOTE: this is a reachable object that transiently signals "conc_unsafe" |
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1021 // However, no allocations are done during this window |
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1022 // during which it is tagged conc_unsafe, so we are assured that any concurrent |
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1023 // thread will not wait forever for the object to revert to "conc_safe". |
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1024 // Further, any such conc_unsafe object will indicate a stable size |
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1025 // through the transition. |
0 | 1026 memcpy(newcm, m->constMethod(), sizeof(constMethodOopDesc)); |
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1027 m->constMethod()->set_is_conc_safe(oopDesc::IsSafeConc); |
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1028 assert(m->constMethod()->is_parsable(), "Should remain parsable"); |
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1029 |
0 | 1030 // Reset correct method/const method, method size, and parameter info |
1031 newcm->set_method(newm()); | |
1032 newm->set_constMethod(newcm); | |
1033 assert(newcm->method() == newm(), "check"); | |
1034 newm->constMethod()->set_code_size(new_code_length); | |
1035 newm->constMethod()->set_constMethod_size(new_const_method_size); | |
1036 newm->set_method_size(new_method_size); | |
1037 assert(newm->code_size() == new_code_length, "check"); | |
1038 assert(newm->checked_exceptions_length() == checked_exceptions_len, "check"); | |
1039 assert(newm->localvariable_table_length() == localvariable_len, "check"); | |
1040 // Copy new byte codes | |
1041 memcpy(newm->code_base(), new_code, new_code_length); | |
1042 // Copy line number table | |
1043 if (new_compressed_linenumber_size > 0) { | |
1044 memcpy(newm->compressed_linenumber_table(), | |
1045 new_compressed_linenumber_table, | |
1046 new_compressed_linenumber_size); | |
1047 } | |
1048 // Copy checked_exceptions | |
1049 if (checked_exceptions_len > 0) { | |
1050 memcpy(newm->checked_exceptions_start(), | |
1051 m->checked_exceptions_start(), | |
1052 checked_exceptions_len * sizeof(CheckedExceptionElement)); | |
1053 } | |
1054 // Copy local variable number table | |
1055 if (localvariable_len > 0) { | |
1056 memcpy(newm->localvariable_table_start(), | |
1057 m->localvariable_table_start(), | |
1058 localvariable_len * sizeof(LocalVariableTableElement)); | |
1059 } | |
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1060 |
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1061 // Only set is_conc_safe to true when changes to newcm are |
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1062 // complete. |
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1063 assert(!newm->is_parsable() || nmsz < 0 || newm->size() == nmsz, "newm->size() inconsistency"); |
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1064 assert(!newcm->is_parsable() || ncmsz < 0 || newcm->size() == ncmsz, "newcm->size() inconsistency"); |
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1065 newcm->set_is_conc_safe(true); |
0 | 1066 return newm; |
1067 } | |
1068 | |
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1069 vmSymbols::SID methodOopDesc::klass_id_for_intrinsics(klassOop holder) { |
0 | 1070 // if loader is not the default loader (i.e., != NULL), we can't know the intrinsics |
1071 // because we are not loading from core libraries | |
856
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1072 if (instanceKlass::cast(holder)->class_loader() != NULL) |
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1073 return vmSymbols::NO_SID; // regardless of name, no intrinsics here |
0 | 1074 |
1075 // see if the klass name is well-known: | |
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1076 Symbol* klass_name = instanceKlass::cast(holder)->name(); |
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1077 return vmSymbols::find_sid(klass_name); |
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1078 } |
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1079 |
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1080 void methodOopDesc::init_intrinsic_id() { |
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1081 assert(_intrinsic_id == vmIntrinsics::_none, "do this just once"); |
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1082 const uintptr_t max_id_uint = right_n_bits((int)(sizeof(_intrinsic_id) * BitsPerByte)); |
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1083 assert((uintptr_t)vmIntrinsics::ID_LIMIT <= max_id_uint, "else fix size"); |
1793
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1084 assert(intrinsic_id_size_in_bytes() == sizeof(_intrinsic_id), ""); |
856
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1085 |
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1086 // the klass name is well-known: |
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1087 vmSymbols::SID klass_id = klass_id_for_intrinsics(method_holder()); |
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1088 assert(klass_id != vmSymbols::NO_SID, "caller responsibility"); |
0 | 1089 |
1090 // ditto for method and signature: | |
1091 vmSymbols::SID name_id = vmSymbols::find_sid(name()); | |
1793
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1092 if (name_id == vmSymbols::NO_SID) return; |
0 | 1093 vmSymbols::SID sig_id = vmSymbols::find_sid(signature()); |
2357
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1094 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
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1095 && !(klass_id == vmSymbols::VM_SYMBOL_ENUM_NAME(java_dyn_MethodHandle) && AllowTransitionalJSR292) |
1793
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1096 && sig_id == vmSymbols::NO_SID) return; |
0 | 1097 jshort flags = access_flags().as_short(); |
1098 | |
856
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1099 vmIntrinsics::ID id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
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1100 if (id != vmIntrinsics::_none) { |
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1101 set_intrinsic_id(id); |
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1102 return; |
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1103 } |
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1104 |
0 | 1105 // A few slightly irregular cases: |
1106 switch (klass_id) { | |
1107 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_StrictMath): | |
1108 // Second chance: check in regular Math. | |
1109 switch (name_id) { | |
1110 case vmSymbols::VM_SYMBOL_ENUM_NAME(min_name): | |
1111 case vmSymbols::VM_SYMBOL_ENUM_NAME(max_name): | |
1112 case vmSymbols::VM_SYMBOL_ENUM_NAME(sqrt_name): | |
1113 // pretend it is the corresponding method in the non-strict class: | |
1114 klass_id = vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_Math); | |
856
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1115 id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
0 | 1116 break; |
1117 } | |
1507
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1118 break; |
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1119 |
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1120 // Signature-polymorphic methods: MethodHandle.invoke*, InvokeDynamic.*. |
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1121 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_dyn_MethodHandle): // AllowTransitionalJSR292 ONLY |
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1122 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle): |
1507
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1123 if (is_static() || !is_native()) break; |
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1124 switch (name_id) { |
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1125 case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeGeneric_name): |
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1126 id = vmIntrinsics::_invokeGeneric; |
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1127 break; |
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1128 case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeExact_name): |
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1129 id = vmIntrinsics::_invokeExact; |
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1130 break; |
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1131 case vmSymbols::VM_SYMBOL_ENUM_NAME(invoke_name): |
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1132 if (AllowInvokeForInvokeGeneric) id = vmIntrinsics::_invokeGeneric; |
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1133 else if (AllowTransitionalJSR292) id = vmIntrinsics::_invokeExact; |
1507
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1134 break; |
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|
1135 } |
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|
1136 break; |
2357
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|
1137 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_InvokeDynamic): |
1507
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|
1138 if (!is_static() || !is_native()) break; |
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|
1139 id = vmIntrinsics::_invokeDynamic; |
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1140 break; |
0 | 1141 } |
1142 | |
856
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1143 if (id != vmIntrinsics::_none) { |
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1144 // Set up its iid. It is an alias method. |
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|
1145 set_intrinsic_id(id); |
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|
1146 return; |
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|
1147 } |
0 | 1148 } |
1149 | |
1150 // These two methods are static since a GC may move the methodOopDesc | |
1151 bool methodOopDesc::load_signature_classes(methodHandle m, TRAPS) { | |
1152 bool sig_is_loaded = true; | |
1153 Handle class_loader(THREAD, instanceKlass::cast(m->method_holder())->class_loader()); | |
1154 Handle protection_domain(THREAD, Klass::cast(m->method_holder())->protection_domain()); | |
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1155 ResourceMark rm(THREAD); |
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1156 Symbol* signature = m->signature(); |
0 | 1157 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
1158 if (ss.is_object()) { | |
2177
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1159 Symbol* sym = ss.as_symbol(CHECK_(false)); |
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1160 Symbol* name = sym; |
0 | 1161 klassOop klass = SystemDictionary::resolve_or_null(name, class_loader, |
1162 protection_domain, THREAD); | |
104
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diff
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|
1163 // We are loading classes eagerly. If a ClassNotFoundException or |
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|
1164 // a LinkageError was generated, be sure to ignore it. |
0 | 1165 if (HAS_PENDING_EXCEPTION) { |
1142 | 1166 if (PENDING_EXCEPTION->is_a(SystemDictionary::ClassNotFoundException_klass()) || |
1167 PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { | |
0 | 1168 CLEAR_PENDING_EXCEPTION; |
1169 } else { | |
1170 return false; | |
1171 } | |
1172 } | |
1173 if( klass == NULL) { sig_is_loaded = false; } | |
1174 } | |
1175 } | |
1176 return sig_is_loaded; | |
1177 } | |
1178 | |
1179 bool methodOopDesc::has_unloaded_classes_in_signature(methodHandle m, TRAPS) { | |
1180 Handle class_loader(THREAD, instanceKlass::cast(m->method_holder())->class_loader()); | |
1181 Handle protection_domain(THREAD, Klass::cast(m->method_holder())->protection_domain()); | |
2177
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1182 ResourceMark rm(THREAD); |
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|
1183 Symbol* signature = m->signature(); |
0 | 1184 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
1185 if (ss.type() == T_OBJECT) { | |
2177
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1186 Symbol* name = ss.as_symbol_or_null(); |
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1187 if (name == NULL) return true; |
0 | 1188 klassOop klass = SystemDictionary::find(name, class_loader, protection_domain, THREAD); |
1189 if (klass == NULL) return true; | |
1190 } | |
1191 } | |
1192 return false; | |
1193 } | |
1194 | |
1195 // Exposed so field engineers can debug VM | |
1196 void methodOopDesc::print_short_name(outputStream* st) { | |
1197 ResourceMark rm; | |
1198 #ifdef PRODUCT | |
1199 st->print(" %s::", method_holder()->klass_part()->external_name()); | |
1200 #else | |
1201 st->print(" %s::", method_holder()->klass_part()->internal_name()); | |
1202 #endif | |
1203 name()->print_symbol_on(st); | |
1204 if (WizardMode) signature()->print_symbol_on(st); | |
1205 } | |
1206 | |
1207 | |
1208 extern "C" { | |
1209 static int method_compare(methodOop* a, methodOop* b) { | |
1210 return (*a)->name()->fast_compare((*b)->name()); | |
1211 } | |
1212 | |
1213 // Prevent qsort from reordering a previous valid sort by | |
1214 // considering the address of the methodOops if two methods | |
1215 // would otherwise compare as equal. Required to preserve | |
1216 // optimal access order in the shared archive. Slower than | |
1217 // method_compare, only used for shared archive creation. | |
1218 static int method_compare_idempotent(methodOop* a, methodOop* b) { | |
1219 int i = method_compare(a, b); | |
1220 if (i != 0) return i; | |
1221 return ( a < b ? -1 : (a == b ? 0 : 1)); | |
1222 } | |
1223 | |
1498
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1224 // We implement special compare versions for narrow oops to avoid |
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1225 // testing for UseCompressedOops on every comparison. |
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|
1226 static int method_compare_narrow(narrowOop* a, narrowOop* b) { |
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|
1227 methodOop m = (methodOop)oopDesc::load_decode_heap_oop(a); |
77261afdc5f2
6935118: UseCompressedOops modification in methodOopDesc::sort_methods() causes JCK timeout
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|
1228 methodOop n = (methodOop)oopDesc::load_decode_heap_oop(b); |
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6935118: UseCompressedOops modification in methodOopDesc::sort_methods() causes JCK timeout
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|
1229 return m->name()->fast_compare(n->name()); |
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|
1230 } |
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6935118: UseCompressedOops modification in methodOopDesc::sort_methods() causes JCK timeout
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|
1231 |
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|
1232 static int method_compare_narrow_idempotent(narrowOop* a, narrowOop* b) { |
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|
1233 int i = method_compare_narrow(a, b); |
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1234 if (i != 0) return i; |
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1235 return ( a < b ? -1 : (a == b ? 0 : 1)); |
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|
1236 } |
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|
1237 |
0 | 1238 typedef int (*compareFn)(const void*, const void*); |
1239 } | |
1240 | |
1241 | |
1242 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
1243 static void reorder_based_on_method_index(objArrayOop methods, | |
1244 objArrayOop annotations, | |
113
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|
1245 GrowableArray<oop>* temp_array) { |
0 | 1246 if (annotations == NULL) { |
1247 return; | |
1248 } | |
1249 | |
1250 int length = methods->length(); | |
1251 int i; | |
1252 // Copy to temp array | |
113
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1253 temp_array->clear(); |
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1254 for (i = 0; i < length; i++) { |
ba764ed4b6f2
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1255 temp_array->append(annotations->obj_at(i)); |
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1256 } |
0 | 1257 |
1258 // Copy back using old method indices | |
1259 for (i = 0; i < length; i++) { | |
1260 methodOop m = (methodOop) methods->obj_at(i); | |
113
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|
1261 annotations->obj_at_put(i, temp_array->at(m->method_idnum())); |
0 | 1262 } |
1263 } | |
1264 | |
1265 | |
1266 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
1267 void methodOopDesc::sort_methods(objArrayOop methods, | |
1268 objArrayOop methods_annotations, | |
1269 objArrayOop methods_parameter_annotations, | |
1270 objArrayOop methods_default_annotations, | |
1271 bool idempotent) { | |
1272 int length = methods->length(); | |
1273 if (length > 1) { | |
1274 bool do_annotations = false; | |
1275 if (methods_annotations != NULL || | |
1276 methods_parameter_annotations != NULL || | |
1277 methods_default_annotations != NULL) { | |
1278 do_annotations = true; | |
1279 } | |
1280 if (do_annotations) { | |
1281 // Remember current method ordering so we can reorder annotations | |
1282 for (int i = 0; i < length; i++) { | |
1283 methodOop m = (methodOop) methods->obj_at(i); | |
1284 m->set_method_idnum(i); | |
1285 } | |
1286 } | |
1287 | |
1288 // Use a simple bubble sort for small number of methods since | |
1289 // qsort requires a functional pointer call for each comparison. | |
1498
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|
1290 if (length < 8) { |
0 | 1291 bool sorted = true; |
1292 for (int i=length-1; i>0; i--) { | |
1293 for (int j=0; j<i; j++) { | |
1294 methodOop m1 = (methodOop)methods->obj_at(j); | |
1295 methodOop m2 = (methodOop)methods->obj_at(j+1); | |
1296 if ((uintptr_t)m1->name() > (uintptr_t)m2->name()) { | |
1297 methods->obj_at_put(j, m2); | |
1298 methods->obj_at_put(j+1, m1); | |
1299 sorted = false; | |
1300 } | |
1301 } | |
1302 if (sorted) break; | |
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1303 sorted = true; |
0 | 1304 } |
1305 } else { | |
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1306 compareFn compare = |
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1307 (UseCompressedOops ? |
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1308 (compareFn) (idempotent ? method_compare_narrow_idempotent : method_compare_narrow): |
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1309 (compareFn) (idempotent ? method_compare_idempotent : method_compare)); |
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1310 qsort(methods->base(), length, heapOopSize, compare); |
0 | 1311 } |
1312 | |
1313 // Sort annotations if necessary | |
1314 assert(methods_annotations == NULL || methods_annotations->length() == methods->length(), ""); | |
1315 assert(methods_parameter_annotations == NULL || methods_parameter_annotations->length() == methods->length(), ""); | |
1316 assert(methods_default_annotations == NULL || methods_default_annotations->length() == methods->length(), ""); | |
1317 if (do_annotations) { | |
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1318 ResourceMark rm; |
0 | 1319 // Allocate temporary storage |
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1320 GrowableArray<oop>* temp_array = new GrowableArray<oop>(length); |
0 | 1321 reorder_based_on_method_index(methods, methods_annotations, temp_array); |
1322 reorder_based_on_method_index(methods, methods_parameter_annotations, temp_array); | |
1323 reorder_based_on_method_index(methods, methods_default_annotations, temp_array); | |
1324 } | |
1325 | |
1326 // Reset method ordering | |
1327 for (int i = 0; i < length; i++) { | |
1328 methodOop m = (methodOop) methods->obj_at(i); | |
1329 m->set_method_idnum(i); | |
1330 } | |
1331 } | |
1332 } | |
1333 | |
1334 | |
1335 //----------------------------------------------------------------------------------- | |
1336 // Non-product code | |
1337 | |
1338 #ifndef PRODUCT | |
1339 class SignatureTypePrinter : public SignatureTypeNames { | |
1340 private: | |
1341 outputStream* _st; | |
1342 bool _use_separator; | |
1343 | |
1344 void type_name(const char* name) { | |
1345 if (_use_separator) _st->print(", "); | |
1346 _st->print(name); | |
1347 _use_separator = true; | |
1348 } | |
1349 | |
1350 public: | |
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1351 SignatureTypePrinter(Symbol* signature, outputStream* st) : SignatureTypeNames(signature) { |
0 | 1352 _st = st; |
1353 _use_separator = false; | |
1354 } | |
1355 | |
1356 void print_parameters() { _use_separator = false; iterate_parameters(); } | |
1357 void print_returntype() { _use_separator = false; iterate_returntype(); } | |
1358 }; | |
1359 | |
1360 | |
1361 void methodOopDesc::print_name(outputStream* st) { | |
1362 Thread *thread = Thread::current(); | |
1363 ResourceMark rm(thread); | |
1364 SignatureTypePrinter sig(signature(), st); | |
1365 st->print("%s ", is_static() ? "static" : "virtual"); | |
1366 sig.print_returntype(); | |
1367 st->print(" %s.", method_holder()->klass_part()->internal_name()); | |
1368 name()->print_symbol_on(st); | |
1369 st->print("("); | |
1370 sig.print_parameters(); | |
1371 st->print(")"); | |
1372 } | |
1373 | |
1374 | |
1375 void methodOopDesc::print_codes_on(outputStream* st) const { | |
1376 print_codes_on(0, code_size(), st); | |
1377 } | |
1378 | |
1379 void methodOopDesc::print_codes_on(int from, int to, outputStream* st) const { | |
1380 Thread *thread = Thread::current(); | |
1381 ResourceMark rm(thread); | |
1382 methodHandle mh (thread, (methodOop)this); | |
1383 BytecodeStream s(mh); | |
1384 s.set_interval(from, to); | |
1385 BytecodeTracer::set_closure(BytecodeTracer::std_closure()); | |
1386 while (s.next() >= 0) BytecodeTracer::trace(mh, s.bcp(), st); | |
1387 } | |
1388 #endif // not PRODUCT | |
1389 | |
1390 | |
1391 // Simple compression of line number tables. We use a regular compressed stream, except that we compress deltas | |
1392 // between (bci,line) pairs since they are smaller. If (bci delta, line delta) fits in (5-bit unsigned, 3-bit unsigned) | |
1393 // we save it as one byte, otherwise we write a 0xFF escape character and use regular compression. 0x0 is used | |
1394 // as end-of-stream terminator. | |
1395 | |
1396 void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) { | |
1397 // bci and line number does not compress into single byte. | |
1398 // Write out escape character and use regular compression for bci and line number. | |
1399 write_byte((jubyte)0xFF); | |
1400 write_signed_int(bci_delta); | |
1401 write_signed_int(line_delta); | |
1402 } | |
1403 | |
1404 // See comment in methodOop.hpp which explains why this exists. | |
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1405 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
0 | 1406 #pragma optimize("", off) |
1407 void CompressedLineNumberWriteStream::write_pair(int bci, int line) { | |
1408 write_pair_inline(bci, line); | |
1409 } | |
1410 #pragma optimize("", on) | |
1411 #endif | |
1412 | |
1413 CompressedLineNumberReadStream::CompressedLineNumberReadStream(u_char* buffer) : CompressedReadStream(buffer) { | |
1414 _bci = 0; | |
1415 _line = 0; | |
1416 }; | |
1417 | |
1418 | |
1419 bool CompressedLineNumberReadStream::read_pair() { | |
1420 jubyte next = read_byte(); | |
1421 // Check for terminator | |
1422 if (next == 0) return false; | |
1423 if (next == 0xFF) { | |
1424 // Escape character, regular compression used | |
1425 _bci += read_signed_int(); | |
1426 _line += read_signed_int(); | |
1427 } else { | |
1428 // Single byte compression used | |
1429 _bci += next >> 3; | |
1430 _line += next & 0x7; | |
1431 } | |
1432 return true; | |
1433 } | |
1434 | |
1435 | |
2142 | 1436 Bytecodes::Code methodOopDesc::orig_bytecode_at(int bci) const { |
0 | 1437 BreakpointInfo* bp = instanceKlass::cast(method_holder())->breakpoints(); |
1438 for (; bp != NULL; bp = bp->next()) { | |
1439 if (bp->match(this, bci)) { | |
1440 return bp->orig_bytecode(); | |
1441 } | |
1442 } | |
1443 ShouldNotReachHere(); | |
1444 return Bytecodes::_shouldnotreachhere; | |
1445 } | |
1446 | |
1447 void methodOopDesc::set_orig_bytecode_at(int bci, Bytecodes::Code code) { | |
1448 assert(code != Bytecodes::_breakpoint, "cannot patch breakpoints this way"); | |
1449 BreakpointInfo* bp = instanceKlass::cast(method_holder())->breakpoints(); | |
1450 for (; bp != NULL; bp = bp->next()) { | |
1451 if (bp->match(this, bci)) { | |
1452 bp->set_orig_bytecode(code); | |
1453 // and continue, in case there is more than one | |
1454 } | |
1455 } | |
1456 } | |
1457 | |
1458 void methodOopDesc::set_breakpoint(int bci) { | |
1459 instanceKlass* ik = instanceKlass::cast(method_holder()); | |
1460 BreakpointInfo *bp = new BreakpointInfo(this, bci); | |
1461 bp->set_next(ik->breakpoints()); | |
1462 ik->set_breakpoints(bp); | |
1463 // do this last: | |
1464 bp->set(this); | |
1465 } | |
1466 | |
1467 static void clear_matches(methodOop m, int bci) { | |
1468 instanceKlass* ik = instanceKlass::cast(m->method_holder()); | |
1469 BreakpointInfo* prev_bp = NULL; | |
1470 BreakpointInfo* next_bp; | |
1471 for (BreakpointInfo* bp = ik->breakpoints(); bp != NULL; bp = next_bp) { | |
1472 next_bp = bp->next(); | |
1473 // bci value of -1 is used to delete all breakpoints in method m (ex: clear_all_breakpoint). | |
1474 if (bci >= 0 ? bp->match(m, bci) : bp->match(m)) { | |
1475 // do this first: | |
1476 bp->clear(m); | |
1477 // unhook it | |
1478 if (prev_bp != NULL) | |
1479 prev_bp->set_next(next_bp); | |
1480 else | |
1481 ik->set_breakpoints(next_bp); | |
1482 delete bp; | |
1483 // When class is redefined JVMTI sets breakpoint in all versions of EMCP methods | |
1484 // at same location. So we have multiple matching (method_index and bci) | |
1485 // BreakpointInfo nodes in BreakpointInfo list. We should just delete one | |
1486 // breakpoint for clear_breakpoint request and keep all other method versions | |
1487 // BreakpointInfo for future clear_breakpoint request. | |
1488 // bcivalue of -1 is used to clear all breakpoints (see clear_all_breakpoints) | |
1489 // which is being called when class is unloaded. We delete all the Breakpoint | |
1490 // information for all versions of method. We may not correctly restore the original | |
1491 // bytecode in all method versions, but that is ok. Because the class is being unloaded | |
1492 // so these methods won't be used anymore. | |
1493 if (bci >= 0) { | |
1494 break; | |
1495 } | |
1496 } else { | |
1497 // This one is a keeper. | |
1498 prev_bp = bp; | |
1499 } | |
1500 } | |
1501 } | |
1502 | |
1503 void methodOopDesc::clear_breakpoint(int bci) { | |
1504 assert(bci >= 0, ""); | |
1505 clear_matches(this, bci); | |
1506 } | |
1507 | |
1508 void methodOopDesc::clear_all_breakpoints() { | |
1509 clear_matches(this, -1); | |
1510 } | |
1511 | |
1512 | |
1783 | 1513 int methodOopDesc::invocation_count() { |
1514 if (TieredCompilation) { | |
1515 const methodDataOop mdo = method_data(); | |
1516 if (invocation_counter()->carry() || ((mdo != NULL) ? mdo->invocation_counter()->carry() : false)) { | |
1517 return InvocationCounter::count_limit; | |
1518 } else { | |
1519 return invocation_counter()->count() + ((mdo != NULL) ? mdo->invocation_counter()->count() : 0); | |
1520 } | |
1521 } else { | |
1522 return invocation_counter()->count(); | |
1523 } | |
1524 } | |
1525 | |
1526 int methodOopDesc::backedge_count() { | |
1527 if (TieredCompilation) { | |
1528 const methodDataOop mdo = method_data(); | |
1529 if (backedge_counter()->carry() || ((mdo != NULL) ? mdo->backedge_counter()->carry() : false)) { | |
1530 return InvocationCounter::count_limit; | |
1531 } else { | |
1532 return backedge_counter()->count() + ((mdo != NULL) ? mdo->backedge_counter()->count() : 0); | |
1533 } | |
1534 } else { | |
1535 return backedge_counter()->count(); | |
1536 } | |
1537 } | |
1538 | |
1539 int methodOopDesc::highest_comp_level() const { | |
1540 methodDataOop mdo = method_data(); | |
1541 if (mdo != NULL) { | |
1542 return mdo->highest_comp_level(); | |
1543 } else { | |
1544 return CompLevel_none; | |
1545 } | |
1546 } | |
1547 | |
1548 int methodOopDesc::highest_osr_comp_level() const { | |
1549 methodDataOop mdo = method_data(); | |
1550 if (mdo != NULL) { | |
1551 return mdo->highest_osr_comp_level(); | |
1552 } else { | |
1553 return CompLevel_none; | |
1554 } | |
1555 } | |
1556 | |
1557 void methodOopDesc::set_highest_comp_level(int level) { | |
1558 methodDataOop mdo = method_data(); | |
1559 if (mdo != NULL) { | |
1560 mdo->set_highest_comp_level(level); | |
1561 } | |
1562 } | |
1563 | |
1564 void methodOopDesc::set_highest_osr_comp_level(int level) { | |
1565 methodDataOop mdo = method_data(); | |
1566 if (mdo != NULL) { | |
1567 mdo->set_highest_osr_comp_level(level); | |
1568 } | |
1569 } | |
1570 | |
0 | 1571 BreakpointInfo::BreakpointInfo(methodOop m, int bci) { |
1572 _bci = bci; | |
1573 _name_index = m->name_index(); | |
1574 _signature_index = m->signature_index(); | |
1575 _orig_bytecode = (Bytecodes::Code) *m->bcp_from(_bci); | |
1576 if (_orig_bytecode == Bytecodes::_breakpoint) | |
1577 _orig_bytecode = m->orig_bytecode_at(_bci); | |
1578 _next = NULL; | |
1579 } | |
1580 | |
1581 void BreakpointInfo::set(methodOop method) { | |
1582 #ifdef ASSERT | |
1583 { | |
1584 Bytecodes::Code code = (Bytecodes::Code) *method->bcp_from(_bci); | |
1585 if (code == Bytecodes::_breakpoint) | |
1586 code = method->orig_bytecode_at(_bci); | |
1587 assert(orig_bytecode() == code, "original bytecode must be the same"); | |
1588 } | |
1589 #endif | |
1590 *method->bcp_from(_bci) = Bytecodes::_breakpoint; | |
1591 method->incr_number_of_breakpoints(); | |
1592 SystemDictionary::notice_modification(); | |
1593 { | |
1594 // Deoptimize all dependents on this method | |
1595 Thread *thread = Thread::current(); | |
1596 HandleMark hm(thread); | |
1597 methodHandle mh(thread, method); | |
1598 Universe::flush_dependents_on_method(mh); | |
1599 } | |
1600 } | |
1601 | |
1602 void BreakpointInfo::clear(methodOop method) { | |
1603 *method->bcp_from(_bci) = orig_bytecode(); | |
1604 assert(method->number_of_breakpoints() > 0, "must not go negative"); | |
1605 method->decr_number_of_breakpoints(); | |
1606 } |