Mercurial > hg > graal-jvmci-8
comparison src/share/vm/prims/methodHandles.cpp @ 6266:1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
6984705: JSR 292 method handle creation should not go through JNI
Summary: remove assembly code for JDK 7 chained method handles
Reviewed-by: jrose, twisti, kvn, mhaupt
Contributed-by: John Rose <john.r.rose@oracle.com>, Christian Thalinger <christian.thalinger@oracle.com>, Michael Haupt <michael.haupt@oracle.com>
author | twisti |
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date | Tue, 24 Jul 2012 10:51:00 -0700 |
parents | 56c4f88474b3 |
children | 93c71eb28866 |
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6241:aba91a731143 | 6266:1d7922586cf6 |
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28 #include "interpreter/interpreter.hpp" | 28 #include "interpreter/interpreter.hpp" |
29 #include "interpreter/oopMapCache.hpp" | 29 #include "interpreter/oopMapCache.hpp" |
30 #include "memory/allocation.inline.hpp" | 30 #include "memory/allocation.inline.hpp" |
31 #include "memory/oopFactory.hpp" | 31 #include "memory/oopFactory.hpp" |
32 #include "prims/methodHandles.hpp" | 32 #include "prims/methodHandles.hpp" |
33 #include "prims/methodHandleWalk.hpp" | |
34 #include "runtime/compilationPolicy.hpp" | 33 #include "runtime/compilationPolicy.hpp" |
35 #include "runtime/javaCalls.hpp" | 34 #include "runtime/javaCalls.hpp" |
36 #include "runtime/reflection.hpp" | 35 #include "runtime/reflection.hpp" |
37 #include "runtime/signature.hpp" | 36 #include "runtime/signature.hpp" |
38 #include "runtime/stubRoutines.hpp" | 37 #include "runtime/stubRoutines.hpp" |
39 | 38 |
39 | |
40 /* | 40 /* |
41 * JSR 292 reference implementation: method handles | 41 * JSR 292 reference implementation: method handles |
42 * The JDK 7 reference implementation represented method handle | |
43 * combinations as chains. Each link in the chain had a "vmentry" | |
44 * field which pointed at a bit of assembly code which performed | |
45 * one transformation before dispatching to the next link in the chain. | |
46 * | |
47 * The current reference implementation pushes almost all code generation | |
48 * responsibility to (trusted) Java code. A method handle contains a | |
49 * pointer to its "LambdaForm", which embodies all details of the method | |
50 * handle's behavior. The LambdaForm is a normal Java object, managed | |
51 * by a runtime coded in Java. | |
42 */ | 52 */ |
43 | 53 |
44 bool MethodHandles::_enabled = false; // set true after successful native linkage | 54 bool MethodHandles::_enabled = false; // set true after successful native linkage |
45 | |
46 MethodHandleEntry* MethodHandles::_entries[MethodHandles::_EK_LIMIT] = {NULL}; | |
47 const char* MethodHandles::_entry_names[_EK_LIMIT+1] = { | |
48 "raise_exception", | |
49 "invokestatic", // how a MH emulates invokestatic | |
50 "invokespecial", // ditto for the other invokes... | |
51 "invokevirtual", | |
52 "invokeinterface", | |
53 "bound_ref", // these are for BMH... | |
54 "bound_int", | |
55 "bound_long", | |
56 "bound_ref_direct", // (direct versions have a direct methodOop) | |
57 "bound_int_direct", | |
58 "bound_long_direct", | |
59 | |
60 // starting at _adapter_mh_first: | |
61 "adapter_retype_only", // these are for AMH... | |
62 "adapter_retype_raw", | |
63 "adapter_check_cast", | |
64 "adapter_prim_to_prim", | |
65 "adapter_ref_to_prim", | |
66 "adapter_prim_to_ref", | |
67 "adapter_swap_args", | |
68 "adapter_rot_args", | |
69 "adapter_dup_args", | |
70 "adapter_drop_args", | |
71 "adapter_collect_args", | |
72 "adapter_spread_args", | |
73 "adapter_fold_args", | |
74 "adapter_unused_13", | |
75 | |
76 // optimized adapter types: | |
77 "adapter_swap_args/1", | |
78 "adapter_swap_args/2", | |
79 "adapter_rot_args/1,up", | |
80 "adapter_rot_args/1,down", | |
81 "adapter_rot_args/2,up", | |
82 "adapter_rot_args/2,down", | |
83 "adapter_prim_to_prim/i2i", | |
84 "adapter_prim_to_prim/l2i", | |
85 "adapter_prim_to_prim/d2f", | |
86 "adapter_prim_to_prim/i2l", | |
87 "adapter_prim_to_prim/f2d", | |
88 "adapter_ref_to_prim/unboxi", | |
89 "adapter_ref_to_prim/unboxl", | |
90 | |
91 // return value handlers for collect/filter/fold adapters: | |
92 "return/ref", | |
93 "return/int", | |
94 "return/long", | |
95 "return/float", | |
96 "return/double", | |
97 "return/void", | |
98 "return/S0/ref", | |
99 "return/S1/ref", | |
100 "return/S2/ref", | |
101 "return/S3/ref", | |
102 "return/S4/ref", | |
103 "return/S5/ref", | |
104 "return/any", | |
105 | |
106 // spreading (array length cases 0, 1, ...) | |
107 "adapter_spread/0", | |
108 "adapter_spread/1/ref", | |
109 "adapter_spread/2/ref", | |
110 "adapter_spread/3/ref", | |
111 "adapter_spread/4/ref", | |
112 "adapter_spread/5/ref", | |
113 "adapter_spread/ref", | |
114 "adapter_spread/byte", | |
115 "adapter_spread/char", | |
116 "adapter_spread/short", | |
117 "adapter_spread/int", | |
118 "adapter_spread/long", | |
119 "adapter_spread/float", | |
120 "adapter_spread/double", | |
121 | |
122 // blocking filter/collect conversions: | |
123 "adapter_collect/ref", | |
124 "adapter_collect/int", | |
125 "adapter_collect/long", | |
126 "adapter_collect/float", | |
127 "adapter_collect/double", | |
128 "adapter_collect/void", | |
129 "adapter_collect/0/ref", | |
130 "adapter_collect/1/ref", | |
131 "adapter_collect/2/ref", | |
132 "adapter_collect/3/ref", | |
133 "adapter_collect/4/ref", | |
134 "adapter_collect/5/ref", | |
135 "adapter_filter/S0/ref", | |
136 "adapter_filter/S1/ref", | |
137 "adapter_filter/S2/ref", | |
138 "adapter_filter/S3/ref", | |
139 "adapter_filter/S4/ref", | |
140 "adapter_filter/S5/ref", | |
141 "adapter_collect/2/S0/ref", | |
142 "adapter_collect/2/S1/ref", | |
143 "adapter_collect/2/S2/ref", | |
144 "adapter_collect/2/S3/ref", | |
145 "adapter_collect/2/S4/ref", | |
146 "adapter_collect/2/S5/ref", | |
147 | |
148 // blocking fold conversions: | |
149 "adapter_fold/ref", | |
150 "adapter_fold/int", | |
151 "adapter_fold/long", | |
152 "adapter_fold/float", | |
153 "adapter_fold/double", | |
154 "adapter_fold/void", | |
155 "adapter_fold/1/ref", | |
156 "adapter_fold/2/ref", | |
157 "adapter_fold/3/ref", | |
158 "adapter_fold/4/ref", | |
159 "adapter_fold/5/ref", | |
160 | |
161 "adapter_opt_profiling", | |
162 | |
163 NULL | |
164 }; | |
165 | |
166 // Adapters. | |
167 MethodHandlesAdapterBlob* MethodHandles::_adapter_code = NULL; | 55 MethodHandlesAdapterBlob* MethodHandles::_adapter_code = NULL; |
168 | |
169 jobject MethodHandles::_raise_exception_method; | |
170 | |
171 address MethodHandles::_adapter_return_handlers[CONV_TYPE_MASK+1]; | |
172 | |
173 #ifdef ASSERT | |
174 bool MethodHandles::spot_check_entry_names() { | |
175 assert(!strcmp(entry_name(_invokestatic_mh), "invokestatic"), ""); | |
176 assert(!strcmp(entry_name(_bound_ref_mh), "bound_ref"), ""); | |
177 assert(!strcmp(entry_name(_adapter_retype_only), "adapter_retype_only"), ""); | |
178 assert(!strcmp(entry_name(_adapter_fold_args), "adapter_fold_args"), ""); | |
179 assert(!strcmp(entry_name(_adapter_opt_unboxi), "adapter_ref_to_prim/unboxi"), ""); | |
180 assert(!strcmp(entry_name(_adapter_opt_spread_char), "adapter_spread/char"), ""); | |
181 assert(!strcmp(entry_name(_adapter_opt_spread_double), "adapter_spread/double"), ""); | |
182 assert(!strcmp(entry_name(_adapter_opt_collect_int), "adapter_collect/int"), ""); | |
183 assert(!strcmp(entry_name(_adapter_opt_collect_0_ref), "adapter_collect/0/ref"), ""); | |
184 assert(!strcmp(entry_name(_adapter_opt_collect_2_S3_ref), "adapter_collect/2/S3/ref"), ""); | |
185 assert(!strcmp(entry_name(_adapter_opt_filter_S5_ref), "adapter_filter/S5/ref"), ""); | |
186 assert(!strcmp(entry_name(_adapter_opt_fold_3_ref), "adapter_fold/3/ref"), ""); | |
187 assert(!strcmp(entry_name(_adapter_opt_fold_void), "adapter_fold/void"), ""); | |
188 return true; | |
189 } | |
190 #endif | |
191 | |
192 | 56 |
193 //------------------------------------------------------------------------------ | 57 //------------------------------------------------------------------------------ |
194 // MethodHandles::generate_adapters | 58 // MethodHandles::generate_adapters |
195 // | 59 // |
196 void MethodHandles::generate_adapters() { | 60 void MethodHandles::generate_adapters() { |
214 //------------------------------------------------------------------------------ | 78 //------------------------------------------------------------------------------ |
215 // MethodHandlesAdapterGenerator::generate | 79 // MethodHandlesAdapterGenerator::generate |
216 // | 80 // |
217 void MethodHandlesAdapterGenerator::generate() { | 81 void MethodHandlesAdapterGenerator::generate() { |
218 // Generate generic method handle adapters. | 82 // Generate generic method handle adapters. |
219 for (MethodHandles::EntryKind ek = MethodHandles::_EK_FIRST; | 83 // Generate interpreter entries |
220 ek < MethodHandles::_EK_LIMIT; | 84 for (Interpreter::MethodKind mk = Interpreter::method_handle_invoke_FIRST; |
221 ek = MethodHandles::EntryKind(1 + (int)ek)) { | 85 mk <= Interpreter::method_handle_invoke_LAST; |
222 if (MethodHandles::ek_supported(ek)) { | 86 mk = Interpreter::MethodKind(1 + (int)mk)) { |
223 StubCodeMark mark(this, "MethodHandle", MethodHandles::entry_name(ek)); | 87 vmIntrinsics::ID iid = Interpreter::method_handle_intrinsic(mk); |
224 MethodHandles::generate_method_handle_stub(_masm, ek); | 88 StubCodeMark mark(this, "MethodHandle::interpreter_entry", vmIntrinsics::name_at(iid)); |
225 } | 89 address entry = MethodHandles::generate_method_handle_interpreter_entry(_masm, iid); |
226 } | 90 if (entry != NULL) { |
227 } | 91 Interpreter::set_entry_for_kind(mk, entry); |
228 | 92 } |
229 | 93 // If the entry is not set, it will throw AbstractMethodError. |
230 //------------------------------------------------------------------------------ | 94 } |
231 // MethodHandles::ek_supported | 95 } |
232 // | |
233 bool MethodHandles::ek_supported(MethodHandles::EntryKind ek) { | |
234 MethodHandles::EntryKind ek_orig = MethodHandles::ek_original_kind(ek); | |
235 switch (ek_orig) { | |
236 case _adapter_unused_13: | |
237 return false; // not defined yet | |
238 case _adapter_prim_to_ref: | |
239 return conv_op_supported(java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF); | |
240 case _adapter_collect_args: | |
241 return conv_op_supported(java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS); | |
242 case _adapter_fold_args: | |
243 return conv_op_supported(java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS); | |
244 } | |
245 return true; | |
246 } | |
247 | |
248 | 96 |
249 void MethodHandles::set_enabled(bool z) { | 97 void MethodHandles::set_enabled(bool z) { |
250 if (_enabled != z) { | 98 if (_enabled != z) { |
251 guarantee(z && EnableInvokeDynamic, "can only enable once, and only if -XX:+EnableInvokeDynamic"); | 99 guarantee(z && EnableInvokeDynamic, "can only enable once, and only if -XX:+EnableInvokeDynamic"); |
252 _enabled = z; | 100 _enabled = z; |
253 } | 101 } |
254 } | 102 } |
255 | |
256 // Note: A method which does not have a TRAPS argument cannot block in the GC | |
257 // or throw exceptions. Such methods are used in this file to do something quick | |
258 // and local, like parse a data structure. For speed, such methods work on plain | |
259 // oops, not handles. Trapping methods uniformly operate on handles. | |
260 | |
261 methodHandle MethodHandles::decode_vmtarget(oop vmtarget, int vmindex, oop mtype, | |
262 KlassHandle& receiver_limit_result, int& decode_flags_result) { | |
263 if (vmtarget == NULL) return methodHandle(); | |
264 assert(methodOopDesc::nonvirtual_vtable_index < 0, "encoding"); | |
265 if (vmindex < 0) { | |
266 // this DMH performs no dispatch; it is directly bound to a methodOop | |
267 // A MemberName may either be directly bound to a methodOop, | |
268 // or it may use the klass/index form; both forms mean the same thing. | |
269 methodOop m = decode_methodOop(methodOop(vmtarget), decode_flags_result); | |
270 if ((decode_flags_result & _dmf_has_receiver) != 0 | |
271 && java_lang_invoke_MethodType::is_instance(mtype)) { | |
272 // Extract receiver type restriction from mtype.ptypes[0]. | |
273 objArrayOop ptypes = java_lang_invoke_MethodType::ptypes(mtype); | |
274 oop ptype0 = (ptypes == NULL || ptypes->length() < 1) ? oop(NULL) : ptypes->obj_at(0); | |
275 if (java_lang_Class::is_instance(ptype0)) | |
276 receiver_limit_result = java_lang_Class::as_klassOop(ptype0); | |
277 } | |
278 if (vmindex == methodOopDesc::nonvirtual_vtable_index) { | |
279 // this DMH can be an "invokespecial" version | |
280 decode_flags_result &= ~_dmf_does_dispatch; | |
281 } else { | |
282 assert(vmindex == methodOopDesc::invalid_vtable_index, "random vmindex?"); | |
283 } | |
284 return m; | |
285 } else { | |
286 assert(vmtarget->is_klass(), "must be class or interface"); | |
287 decode_flags_result |= MethodHandles::_dmf_does_dispatch; | |
288 decode_flags_result |= MethodHandles::_dmf_has_receiver; | |
289 receiver_limit_result = (klassOop)vmtarget; | |
290 Klass* tk = Klass::cast((klassOop)vmtarget); | |
291 if (tk->is_interface()) { | |
292 // an itable linkage is <interface, itable index> | |
293 decode_flags_result |= MethodHandles::_dmf_from_interface; | |
294 return klassItable::method_for_itable_index((klassOop)vmtarget, vmindex); | |
295 } else { | |
296 if (!tk->oop_is_instance()) | |
297 tk = instanceKlass::cast(SystemDictionary::Object_klass()); | |
298 return ((instanceKlass*)tk)->method_at_vtable(vmindex); | |
299 } | |
300 } | |
301 } | |
302 | |
303 // MemberName and DirectMethodHandle have the same linkage to the JVM internals. | |
304 // (MemberName is the non-operational name used for queries and setup.) | |
305 | |
306 methodHandle MethodHandles::decode_DirectMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result) { | |
307 oop vmtarget = java_lang_invoke_DirectMethodHandle::vmtarget(mh); | |
308 int vmindex = java_lang_invoke_DirectMethodHandle::vmindex(mh); | |
309 oop mtype = java_lang_invoke_DirectMethodHandle::type(mh); | |
310 return decode_vmtarget(vmtarget, vmindex, mtype, receiver_limit_result, decode_flags_result); | |
311 } | |
312 | |
313 methodHandle MethodHandles::decode_BoundMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result) { | |
314 assert(java_lang_invoke_BoundMethodHandle::is_instance(mh), ""); | |
315 assert(mh->klass() != SystemDictionary::AdapterMethodHandle_klass(), ""); | |
316 for (oop bmh = mh;;) { | |
317 // Bound MHs can be stacked to bind several arguments. | |
318 oop target = java_lang_invoke_MethodHandle::vmtarget(bmh); | |
319 if (target == NULL) return methodHandle(); | |
320 decode_flags_result |= MethodHandles::_dmf_binds_argument; | |
321 klassOop tk = target->klass(); | |
322 if (tk == SystemDictionary::BoundMethodHandle_klass()) { | |
323 bmh = target; | |
324 continue; | |
325 } else { | |
326 if (java_lang_invoke_MethodHandle::is_subclass(tk)) { | |
327 //assert(tk == SystemDictionary::DirectMethodHandle_klass(), "end of BMH chain must be DMH"); | |
328 return decode_MethodHandle(target, receiver_limit_result, decode_flags_result); | |
329 } else { | |
330 // Optimized case: binding a receiver to a non-dispatched DMH | |
331 // short-circuits directly to the methodOop. | |
332 // (It might be another argument besides a receiver also.) | |
333 assert(target->is_method(), "must be a simple method"); | |
334 decode_flags_result |= MethodHandles::_dmf_binds_method; | |
335 methodOop m = (methodOop) target; | |
336 if (!m->is_static()) | |
337 decode_flags_result |= MethodHandles::_dmf_has_receiver; | |
338 return m; | |
339 } | |
340 } | |
341 } | |
342 } | |
343 | |
344 methodHandle MethodHandles::decode_AdapterMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result) { | |
345 assert(mh->klass() == SystemDictionary::AdapterMethodHandle_klass(), ""); | |
346 for (oop amh = mh;;) { | |
347 // Adapter MHs can be stacked to convert several arguments. | |
348 int conv_op = adapter_conversion_op(java_lang_invoke_AdapterMethodHandle::conversion(amh)); | |
349 decode_flags_result |= (_dmf_adapter_lsb << conv_op) & _DMF_ADAPTER_MASK; | |
350 oop target = java_lang_invoke_MethodHandle::vmtarget(amh); | |
351 if (target == NULL) return methodHandle(); | |
352 klassOop tk = target->klass(); | |
353 if (tk == SystemDictionary::AdapterMethodHandle_klass()) { | |
354 amh = target; | |
355 continue; | |
356 } else { | |
357 // must be a BMH (which will bind some more arguments) or a DMH (for the final call) | |
358 return MethodHandles::decode_MethodHandle(target, receiver_limit_result, decode_flags_result); | |
359 } | |
360 } | |
361 } | |
362 | |
363 methodHandle MethodHandles::decode_MethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result) { | |
364 if (mh == NULL) return methodHandle(); | |
365 klassOop mhk = mh->klass(); | |
366 assert(java_lang_invoke_MethodHandle::is_subclass(mhk), "must be a MethodHandle"); | |
367 if (mhk == SystemDictionary::DirectMethodHandle_klass()) { | |
368 return decode_DirectMethodHandle(mh, receiver_limit_result, decode_flags_result); | |
369 } else if (mhk == SystemDictionary::BoundMethodHandle_klass()) { | |
370 return decode_BoundMethodHandle(mh, receiver_limit_result, decode_flags_result); | |
371 } else if (mhk == SystemDictionary::AdapterMethodHandle_klass()) { | |
372 return decode_AdapterMethodHandle(mh, receiver_limit_result, decode_flags_result); | |
373 } else if (java_lang_invoke_BoundMethodHandle::is_subclass(mhk)) { | |
374 // could be a JavaMethodHandle (but not an adapter MH) | |
375 return decode_BoundMethodHandle(mh, receiver_limit_result, decode_flags_result); | |
376 } else { | |
377 assert(false, "cannot parse this MH"); | |
378 return methodHandle(); // random MH? | |
379 } | |
380 } | |
381 | |
382 methodOop MethodHandles::decode_methodOop(methodOop m, int& decode_flags_result) { | |
383 assert(m->is_method(), ""); | |
384 if (m->is_static()) { | |
385 // check that signature begins '(L' or '([' (not '(I', '()', etc.) | |
386 Symbol* sig = m->signature(); | |
387 BasicType recv_bt = char2type(sig->byte_at(1)); | |
388 // Note: recv_bt might be T_ILLEGAL if byte_at(2) is ')' | |
389 assert(sig->byte_at(0) == '(', "must be method sig"); | |
390 // if (recv_bt == T_OBJECT || recv_bt == T_ARRAY) | |
391 // decode_flags_result |= _dmf_has_receiver; | |
392 } else { | |
393 // non-static method | |
394 decode_flags_result |= _dmf_has_receiver; | |
395 if (!m->can_be_statically_bound() && !m->is_initializer()) { | |
396 decode_flags_result |= _dmf_does_dispatch; | |
397 if (Klass::cast(m->method_holder())->is_interface()) | |
398 decode_flags_result |= _dmf_from_interface; | |
399 } | |
400 } | |
401 return m; | |
402 } | |
403 | |
404 | |
405 // A trusted party is handing us a cookie to determine a method. | |
406 // Let's boil it down to the method oop they really want. | |
407 methodHandle MethodHandles::decode_method(oop x, KlassHandle& receiver_limit_result, int& decode_flags_result) { | |
408 decode_flags_result = 0; | |
409 receiver_limit_result = KlassHandle(); | |
410 klassOop xk = x->klass(); | |
411 if (xk == Universe::methodKlassObj()) { | |
412 return decode_methodOop((methodOop) x, decode_flags_result); | |
413 } else if (xk == SystemDictionary::MemberName_klass()) { | |
414 // Note: This only works if the MemberName has already been resolved. | |
415 return decode_MemberName(x, receiver_limit_result, decode_flags_result); | |
416 } else if (java_lang_invoke_MethodHandle::is_subclass(xk)) { | |
417 return decode_MethodHandle(x, receiver_limit_result, decode_flags_result); | |
418 } else if (xk == SystemDictionary::reflect_Method_klass()) { | |
419 oop clazz = java_lang_reflect_Method::clazz(x); | |
420 int slot = java_lang_reflect_Method::slot(x); | |
421 klassOop k = java_lang_Class::as_klassOop(clazz); | |
422 if (k != NULL && Klass::cast(k)->oop_is_instance()) | |
423 return decode_methodOop(instanceKlass::cast(k)->method_with_idnum(slot), | |
424 decode_flags_result); | |
425 } else if (xk == SystemDictionary::reflect_Constructor_klass()) { | |
426 oop clazz = java_lang_reflect_Constructor::clazz(x); | |
427 int slot = java_lang_reflect_Constructor::slot(x); | |
428 klassOop k = java_lang_Class::as_klassOop(clazz); | |
429 if (k != NULL && Klass::cast(k)->oop_is_instance()) | |
430 return decode_methodOop(instanceKlass::cast(k)->method_with_idnum(slot), | |
431 decode_flags_result); | |
432 } else { | |
433 // unrecognized object | |
434 assert(!x->is_method(), "already checked"); | |
435 assert(!java_lang_invoke_MemberName::is_instance(x), "already checked"); | |
436 } | |
437 return methodHandle(); | |
438 } | |
439 | |
440 | |
441 int MethodHandles::decode_MethodHandle_stack_pushes(oop mh) { | |
442 if (mh->klass() == SystemDictionary::DirectMethodHandle_klass()) | |
443 return 0; // no push/pop | |
444 int this_vmslots = java_lang_invoke_MethodHandle::vmslots(mh); | |
445 int last_vmslots = 0; | |
446 oop last_mh = mh; | |
447 for (;;) { | |
448 oop target = java_lang_invoke_MethodHandle::vmtarget(last_mh); | |
449 if (target->klass() == SystemDictionary::DirectMethodHandle_klass()) { | |
450 last_vmslots = java_lang_invoke_MethodHandle::vmslots(target); | |
451 break; | |
452 } else if (!java_lang_invoke_MethodHandle::is_instance(target)) { | |
453 // might be klass or method | |
454 assert(target->is_method(), "must get here with a direct ref to method"); | |
455 last_vmslots = methodOop(target)->size_of_parameters(); | |
456 break; | |
457 } | |
458 last_mh = target; | |
459 } | |
460 // If I am called with fewer VM slots than my ultimate callee, | |
461 // it must be that I push the additionally needed slots. | |
462 // Likewise if am called with more VM slots, I will pop them. | |
463 return (last_vmslots - this_vmslots); | |
464 } | |
465 | |
466 | 103 |
467 // MemberName support | 104 // MemberName support |
468 | 105 |
469 // import java_lang_invoke_MemberName.* | 106 // import java_lang_invoke_MemberName.* |
470 enum { | 107 enum { |
471 IS_METHOD = java_lang_invoke_MemberName::MN_IS_METHOD, | 108 IS_METHOD = java_lang_invoke_MemberName::MN_IS_METHOD, |
472 IS_CONSTRUCTOR = java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR, | 109 IS_CONSTRUCTOR = java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR, |
473 IS_FIELD = java_lang_invoke_MemberName::MN_IS_FIELD, | 110 IS_FIELD = java_lang_invoke_MemberName::MN_IS_FIELD, |
474 IS_TYPE = java_lang_invoke_MemberName::MN_IS_TYPE, | 111 IS_TYPE = java_lang_invoke_MemberName::MN_IS_TYPE, |
112 REFERENCE_KIND_SHIFT = java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT, | |
113 REFERENCE_KIND_MASK = java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK, | |
475 SEARCH_SUPERCLASSES = java_lang_invoke_MemberName::MN_SEARCH_SUPERCLASSES, | 114 SEARCH_SUPERCLASSES = java_lang_invoke_MemberName::MN_SEARCH_SUPERCLASSES, |
476 SEARCH_INTERFACES = java_lang_invoke_MemberName::MN_SEARCH_INTERFACES, | 115 SEARCH_INTERFACES = java_lang_invoke_MemberName::MN_SEARCH_INTERFACES, |
477 ALL_KINDS = IS_METHOD | IS_CONSTRUCTOR | IS_FIELD | IS_TYPE, | 116 ALL_KINDS = IS_METHOD | IS_CONSTRUCTOR | IS_FIELD | IS_TYPE |
478 VM_INDEX_UNINITIALIZED = java_lang_invoke_MemberName::VM_INDEX_UNINITIALIZED | |
479 }; | 117 }; |
480 | 118 |
481 Handle MethodHandles::new_MemberName(TRAPS) { | 119 Handle MethodHandles::new_MemberName(TRAPS) { |
482 Handle empty; | 120 Handle empty; |
483 instanceKlassHandle k(THREAD, SystemDictionary::MemberName_klass()); | 121 instanceKlassHandle k(THREAD, SystemDictionary::MemberName_klass()); |
484 if (!k->is_initialized()) k->initialize(CHECK_(empty)); | 122 if (!k->is_initialized()) k->initialize(CHECK_(empty)); |
485 return Handle(THREAD, k->allocate_instance(THREAD)); | 123 return Handle(THREAD, k->allocate_instance(THREAD)); |
486 } | 124 } |
487 | 125 |
488 void MethodHandles::init_MemberName(oop mname_oop, oop target_oop) { | 126 oop MethodHandles::init_MemberName(oop mname_oop, oop target_oop) { |
489 if (target_oop->klass() == SystemDictionary::reflect_Field_klass()) { | 127 klassOop target_klass = target_oop->klass(); |
128 if (target_klass == SystemDictionary::reflect_Field_klass()) { | |
490 oop clazz = java_lang_reflect_Field::clazz(target_oop); // fd.field_holder() | 129 oop clazz = java_lang_reflect_Field::clazz(target_oop); // fd.field_holder() |
491 int slot = java_lang_reflect_Field::slot(target_oop); // fd.index() | 130 int slot = java_lang_reflect_Field::slot(target_oop); // fd.index() |
492 int mods = java_lang_reflect_Field::modifiers(target_oop); | 131 int mods = java_lang_reflect_Field::modifiers(target_oop); |
132 oop type = java_lang_reflect_Field::type(target_oop); | |
133 oop name = java_lang_reflect_Field::name(target_oop); | |
493 klassOop k = java_lang_Class::as_klassOop(clazz); | 134 klassOop k = java_lang_Class::as_klassOop(clazz); |
494 int offset = instanceKlass::cast(k)->field_offset(slot); | 135 intptr_t offset = instanceKlass::cast(k)->field_offset(slot); |
495 init_MemberName(mname_oop, k, accessFlags_from(mods), offset); | 136 return init_field_MemberName(mname_oop, k, accessFlags_from(mods), type, name, offset); |
137 } else if (target_klass == SystemDictionary::reflect_Method_klass()) { | |
138 oop clazz = java_lang_reflect_Method::clazz(target_oop); | |
139 int slot = java_lang_reflect_Method::slot(target_oop); | |
140 klassOop k = java_lang_Class::as_klassOop(clazz); | |
141 if (k != NULL && Klass::cast(k)->oop_is_instance()) { | |
142 methodOop m = instanceKlass::cast(k)->method_with_idnum(slot); | |
143 return init_method_MemberName(mname_oop, m, true, k); | |
144 } | |
145 } else if (target_klass == SystemDictionary::reflect_Constructor_klass()) { | |
146 oop clazz = java_lang_reflect_Constructor::clazz(target_oop); | |
147 int slot = java_lang_reflect_Constructor::slot(target_oop); | |
148 klassOop k = java_lang_Class::as_klassOop(clazz); | |
149 if (k != NULL && Klass::cast(k)->oop_is_instance()) { | |
150 methodOop m = instanceKlass::cast(k)->method_with_idnum(slot); | |
151 return init_method_MemberName(mname_oop, m, false, k); | |
152 } | |
153 } else if (target_klass == SystemDictionary::MemberName_klass()) { | |
154 // Note: This only works if the MemberName has already been resolved. | |
155 oop clazz = java_lang_invoke_MemberName::clazz(target_oop); | |
156 int flags = java_lang_invoke_MemberName::flags(target_oop); | |
157 oop vmtarget = java_lang_invoke_MemberName::vmtarget(target_oop); | |
158 intptr_t vmindex = java_lang_invoke_MemberName::vmindex(target_oop); | |
159 klassOop k = java_lang_Class::as_klassOop(clazz); | |
160 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK; | |
161 if (vmtarget == NULL) return NULL; // not resolved | |
162 if ((flags & IS_FIELD) != 0) { | |
163 assert(vmtarget->is_klass(), "field vmtarget is klassOop"); | |
164 int basic_mods = (ref_kind_is_static(ref_kind) ? JVM_ACC_STATIC : 0); | |
165 // FIXME: how does k (receiver_limit) contribute? | |
166 return init_field_MemberName(mname_oop, klassOop(vmtarget), accessFlags_from(basic_mods), NULL, NULL, vmindex); | |
167 } else if ((flags & (IS_METHOD | IS_CONSTRUCTOR)) != 0) { | |
168 assert(vmtarget->is_method(), "method or constructor vmtarget is methodOop"); | |
169 return init_method_MemberName(mname_oop, methodOop(vmtarget), ref_kind_does_dispatch(ref_kind), k); | |
170 } else { | |
171 return NULL; | |
172 } | |
173 } | |
174 return NULL; | |
175 } | |
176 | |
177 oop MethodHandles::init_method_MemberName(oop mname_oop, methodOop m, bool do_dispatch, | |
178 klassOop receiver_limit) { | |
179 AccessFlags mods = m->access_flags(); | |
180 int flags = (jushort)( mods.as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS ); | |
181 int vmindex = methodOopDesc::nonvirtual_vtable_index; // implies never any dispatch | |
182 klassOop mklass = m->method_holder(); | |
183 if (receiver_limit == NULL) | |
184 receiver_limit = mklass; | |
185 if (m->is_initializer()) { | |
186 flags |= IS_CONSTRUCTOR | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT); | |
187 } else if (mods.is_static()) { | |
188 flags |= IS_METHOD | (JVM_REF_invokeStatic << REFERENCE_KIND_SHIFT); | |
189 } else if (receiver_limit != mklass && | |
190 !Klass::cast(receiver_limit)->is_subtype_of(mklass)) { | |
191 return NULL; // bad receiver limit | |
192 } else if (Klass::cast(receiver_limit)->is_interface() && | |
193 Klass::cast(mklass)->is_interface()) { | |
194 flags |= IS_METHOD | (JVM_REF_invokeInterface << REFERENCE_KIND_SHIFT); | |
195 receiver_limit = mklass; // ignore passed-in limit; interfaces are interconvertible | |
196 vmindex = klassItable::compute_itable_index(m); | |
197 } else if (mklass != receiver_limit && Klass::cast(mklass)->is_interface()) { | |
198 flags |= IS_METHOD | (JVM_REF_invokeVirtual << REFERENCE_KIND_SHIFT); | |
199 // it is a miranda method, so m->vtable_index is not what we want | |
200 ResourceMark rm; | |
201 klassVtable* vt = instanceKlass::cast(receiver_limit)->vtable(); | |
202 vmindex = vt->index_of_miranda(m->name(), m->signature()); | |
203 } else if (!do_dispatch || m->can_be_statically_bound()) { | |
204 flags |= IS_METHOD | (JVM_REF_invokeSpecial << REFERENCE_KIND_SHIFT); | |
496 } else { | 205 } else { |
497 KlassHandle receiver_limit; int decode_flags = 0; | 206 flags |= IS_METHOD | (JVM_REF_invokeVirtual << REFERENCE_KIND_SHIFT); |
498 methodHandle m = MethodHandles::decode_method(target_oop, receiver_limit, decode_flags); | 207 vmindex = m->vtable_index(); |
499 bool do_dispatch = ((decode_flags & MethodHandles::_dmf_does_dispatch) != 0); | 208 } |
500 init_MemberName(mname_oop, m(), do_dispatch); | 209 |
501 } | 210 java_lang_invoke_MemberName::set_flags(mname_oop, flags); |
502 } | 211 java_lang_invoke_MemberName::set_vmtarget(mname_oop, m); |
503 | 212 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); // vtable/itable index |
504 void MethodHandles::init_MemberName(oop mname_oop, methodOop m, bool do_dispatch) { | 213 java_lang_invoke_MemberName::set_clazz(mname_oop, Klass::cast(receiver_limit)->java_mirror()); |
505 int flags = ((m->is_initializer() ? IS_CONSTRUCTOR : IS_METHOD) | 214 // Note: name and type can be lazily computed by resolve_MemberName, |
506 | (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS )); | 215 // if Java code needs them as resolved String and MethodType objects. |
507 oop vmtarget = m; | 216 // The clazz must be eagerly stored, because it provides a GC |
508 int vmindex = methodOopDesc::invalid_vtable_index; // implies no info yet | 217 // root to help keep alive the methodOop. |
509 if (!do_dispatch || (flags & IS_CONSTRUCTOR) || m->can_be_statically_bound()) | 218 // If relevant, the vtable or itable value is stored as vmindex. |
510 vmindex = methodOopDesc::nonvirtual_vtable_index; // implies never any dispatch | 219 // This is done eagerly, since it is readily available without |
511 assert(vmindex != VM_INDEX_UNINITIALIZED, "Java sentinel value"); | 220 // constructing any new objects. |
221 // TO DO: maybe intern mname_oop | |
222 return mname_oop; | |
223 } | |
224 | |
225 Handle MethodHandles::init_method_MemberName(oop mname_oop, CallInfo& info, TRAPS) { | |
226 Handle empty; | |
227 if (info.resolved_appendix().not_null()) { | |
228 // The resolved MemberName must not be accompanied by an appendix argument, | |
229 // since there is no way to bind this value into the MemberName. | |
230 // Caller is responsible to prevent this from happening. | |
231 THROW_MSG_(vmSymbols::java_lang_InternalError(), "appendix", empty); | |
232 } | |
233 methodHandle m = info.resolved_method(); | |
234 KlassHandle defc = info.resolved_klass(); | |
235 int vmindex = -1; | |
236 if (defc->is_interface() && Klass::cast(m->method_holder())->is_interface()) { | |
237 // LinkResolver does not report itable indexes! (fix this?) | |
238 vmindex = klassItable::compute_itable_index(m()); | |
239 } else if (m->can_be_statically_bound()) { | |
240 // LinkResolver reports vtable index even for final methods! | |
241 vmindex = methodOopDesc::nonvirtual_vtable_index; | |
242 } else { | |
243 vmindex = info.vtable_index(); | |
244 } | |
245 oop res = init_method_MemberName(mname_oop, m(), (vmindex >= 0), defc()); | |
246 assert(res == NULL || (java_lang_invoke_MemberName::vmindex(res) == vmindex), ""); | |
247 return Handle(THREAD, res); | |
248 } | |
249 | |
250 oop MethodHandles::init_field_MemberName(oop mname_oop, klassOop field_holder, | |
251 AccessFlags mods, oop type, oop name, | |
252 intptr_t offset, bool is_setter) { | |
253 int flags = (jushort)( mods.as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS ); | |
254 flags |= IS_FIELD | ((mods.is_static() ? JVM_REF_getStatic : JVM_REF_getField) << REFERENCE_KIND_SHIFT); | |
255 if (is_setter) flags += ((JVM_REF_putField - JVM_REF_getField) << REFERENCE_KIND_SHIFT); | |
256 oop vmtarget = field_holder; | |
257 int vmindex = offset; // determines the field uniquely when combined with static bit | |
258 java_lang_invoke_MemberName::set_flags(mname_oop, flags); | |
512 java_lang_invoke_MemberName::set_vmtarget(mname_oop, vmtarget); | 259 java_lang_invoke_MemberName::set_vmtarget(mname_oop, vmtarget); |
513 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); | 260 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); |
514 java_lang_invoke_MemberName::set_flags(mname_oop, flags); | |
515 java_lang_invoke_MemberName::set_clazz(mname_oop, Klass::cast(m->method_holder())->java_mirror()); | |
516 } | |
517 | |
518 void MethodHandles::init_MemberName(oop mname_oop, klassOop field_holder, AccessFlags mods, int offset) { | |
519 int flags = (IS_FIELD | (jushort)( mods.as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS )); | |
520 oop vmtarget = field_holder; | |
521 int vmindex = offset; // determines the field uniquely when combined with static bit | |
522 assert(vmindex != VM_INDEX_UNINITIALIZED, "bad alias on vmindex"); | |
523 java_lang_invoke_MemberName::set_vmtarget(mname_oop, vmtarget); | |
524 java_lang_invoke_MemberName::set_vmindex(mname_oop, vmindex); | |
525 java_lang_invoke_MemberName::set_flags(mname_oop, flags); | |
526 java_lang_invoke_MemberName::set_clazz(mname_oop, Klass::cast(field_holder)->java_mirror()); | 261 java_lang_invoke_MemberName::set_clazz(mname_oop, Klass::cast(field_holder)->java_mirror()); |
527 } | 262 if (name != NULL) |
528 | 263 java_lang_invoke_MemberName::set_name(mname_oop, name); |
529 | 264 if (type != NULL) |
530 methodHandle MethodHandles::decode_MemberName(oop mname, KlassHandle& receiver_limit_result, int& decode_flags_result) { | 265 java_lang_invoke_MemberName::set_type(mname_oop, type); |
531 methodHandle empty; | 266 // Note: name and type can be lazily computed by resolve_MemberName, |
532 int flags = java_lang_invoke_MemberName::flags(mname); | 267 // if Java code needs them as resolved String and Class objects. |
533 if ((flags & (IS_METHOD | IS_CONSTRUCTOR)) == 0) return empty; // not invocable | 268 // Note that the incoming type oop might be pre-resolved (non-null). |
534 oop vmtarget = java_lang_invoke_MemberName::vmtarget(mname); | 269 // The base clazz and field offset (vmindex) must be eagerly stored, |
535 int vmindex = java_lang_invoke_MemberName::vmindex(mname); | 270 // because they unambiguously identify the field. |
536 if (vmindex == VM_INDEX_UNINITIALIZED) return empty; // not resolved | 271 // Although the fieldDescriptor::_index would also identify the field, |
537 methodHandle m = decode_vmtarget(vmtarget, vmindex, NULL, receiver_limit_result, decode_flags_result); | 272 // we do not use it, because it is harder to decode. |
538 oop clazz = java_lang_invoke_MemberName::clazz(mname); | 273 // TO DO: maybe intern mname_oop |
539 if (clazz != NULL && java_lang_Class::is_instance(clazz)) { | 274 return mname_oop; |
540 klassOop klass = java_lang_Class::as_klassOop(clazz); | 275 } |
541 if (klass != NULL) receiver_limit_result = klass; | 276 |
542 } | 277 Handle MethodHandles::init_field_MemberName(oop mname_oop, FieldAccessInfo& info, TRAPS) { |
543 return m; | 278 return Handle(); |
544 } | 279 #if 0 |
280 KlassHandle field_holder = info.klass(); | |
281 intptr_t field_offset = info.field_offset(); | |
282 return init_field_MemberName(mname_oop, field_holder(), | |
283 info.access_flags(), | |
284 type, name, | |
285 field_offset, false /*is_setter*/); | |
286 #endif | |
287 } | |
288 | |
289 | |
290 // JVM 2.9 Special Methods: | |
291 // A method is signature polymorphic if and only if all of the following conditions hold : | |
292 // * It is declared in the java.lang.invoke.MethodHandle class. | |
293 // * It has a single formal parameter of type Object[]. | |
294 // * It has a return type of Object. | |
295 // * It has the ACC_VARARGS and ACC_NATIVE flags set. | |
296 bool MethodHandles::is_method_handle_invoke_name(klassOop klass, Symbol* name) { | |
297 if (klass == NULL) | |
298 return false; | |
299 // The following test will fail spuriously during bootstrap of MethodHandle itself: | |
300 // if (klass != SystemDictionary::MethodHandle_klass()) | |
301 // Test the name instead: | |
302 if (Klass::cast(klass)->name() != vmSymbols::java_lang_invoke_MethodHandle()) | |
303 return false; | |
304 Symbol* poly_sig = vmSymbols::object_array_object_signature(); | |
305 methodOop m = instanceKlass::cast(klass)->find_method(name, poly_sig); | |
306 if (m == NULL) return false; | |
307 int required = JVM_ACC_NATIVE | JVM_ACC_VARARGS; | |
308 int flags = m->access_flags().as_int(); | |
309 return (flags & required) == required; | |
310 } | |
311 | |
312 | |
313 Symbol* MethodHandles::signature_polymorphic_intrinsic_name(vmIntrinsics::ID iid) { | |
314 assert(is_signature_polymorphic_intrinsic(iid), err_msg("iid=%d", iid)); | |
315 switch (iid) { | |
316 case vmIntrinsics::_invokeBasic: return vmSymbols::invokeBasic_name(); | |
317 case vmIntrinsics::_linkToVirtual: return vmSymbols::linkToVirtual_name(); | |
318 case vmIntrinsics::_linkToStatic: return vmSymbols::linkToStatic_name(); | |
319 case vmIntrinsics::_linkToSpecial: return vmSymbols::linkToSpecial_name(); | |
320 case vmIntrinsics::_linkToInterface: return vmSymbols::linkToInterface_name(); | |
321 } | |
322 assert(false, ""); | |
323 return 0; | |
324 } | |
325 | |
326 int MethodHandles::signature_polymorphic_intrinsic_ref_kind(vmIntrinsics::ID iid) { | |
327 switch (iid) { | |
328 case vmIntrinsics::_invokeBasic: return 0; | |
329 case vmIntrinsics::_linkToVirtual: return JVM_REF_invokeVirtual; | |
330 case vmIntrinsics::_linkToStatic: return JVM_REF_invokeStatic; | |
331 case vmIntrinsics::_linkToSpecial: return JVM_REF_invokeSpecial; | |
332 case vmIntrinsics::_linkToInterface: return JVM_REF_invokeInterface; | |
333 } | |
334 assert(false, err_msg("iid=%d", iid)); | |
335 return 0; | |
336 } | |
337 | |
338 vmIntrinsics::ID MethodHandles::signature_polymorphic_name_id(Symbol* name) { | |
339 vmSymbols::SID name_id = vmSymbols::find_sid(name); | |
340 switch (name_id) { | |
341 // The ID _invokeGeneric stands for all non-static signature-polymorphic methods, except built-ins. | |
342 case vmSymbols::VM_SYMBOL_ENUM_NAME(invoke_name): return vmIntrinsics::_invokeGeneric; | |
343 // The only built-in non-static signature-polymorphic method is MethodHandle.invokeBasic: | |
344 case vmSymbols::VM_SYMBOL_ENUM_NAME(invokeBasic_name): return vmIntrinsics::_invokeBasic; | |
345 | |
346 // There is one static signature-polymorphic method for each JVM invocation mode. | |
347 case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToVirtual_name): return vmIntrinsics::_linkToVirtual; | |
348 case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToStatic_name): return vmIntrinsics::_linkToStatic; | |
349 case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToSpecial_name): return vmIntrinsics::_linkToSpecial; | |
350 case vmSymbols::VM_SYMBOL_ENUM_NAME(linkToInterface_name): return vmIntrinsics::_linkToInterface; | |
351 } | |
352 | |
353 // Cover the case of invokeExact and any future variants of invokeFoo. | |
354 klassOop mh_klass = SystemDictionary::well_known_klass( | |
355 SystemDictionary::WK_KLASS_ENUM_NAME(MethodHandle_klass) ); | |
356 if (mh_klass != NULL && is_method_handle_invoke_name(mh_klass, name)) | |
357 return vmIntrinsics::_invokeGeneric; | |
358 | |
359 // Note: The pseudo-intrinsic _compiledLambdaForm is never linked against. | |
360 // Instead it is used to mark lambda forms bound to invokehandle or invokedynamic. | |
361 return vmIntrinsics::_none; | |
362 } | |
363 | |
364 vmIntrinsics::ID MethodHandles::signature_polymorphic_name_id(klassOop klass, Symbol* name) { | |
365 if (klass != NULL && | |
366 Klass::cast(klass)->name() == vmSymbols::java_lang_invoke_MethodHandle()) { | |
367 vmIntrinsics::ID iid = signature_polymorphic_name_id(name); | |
368 if (iid != vmIntrinsics::_none) | |
369 return iid; | |
370 if (is_method_handle_invoke_name(klass, name)) | |
371 return vmIntrinsics::_invokeGeneric; | |
372 } | |
373 return vmIntrinsics::_none; | |
374 } | |
375 | |
545 | 376 |
546 // convert the external string or reflective type to an internal signature | 377 // convert the external string or reflective type to an internal signature |
547 Symbol* MethodHandles::convert_to_signature(oop type_str, bool polymorphic, TRAPS) { | 378 Symbol* MethodHandles::lookup_signature(oop type_str, bool intern_if_not_found, TRAPS) { |
548 if (java_lang_invoke_MethodType::is_instance(type_str)) { | 379 if (java_lang_invoke_MethodType::is_instance(type_str)) { |
549 return java_lang_invoke_MethodType::as_signature(type_str, polymorphic, CHECK_NULL); | 380 return java_lang_invoke_MethodType::as_signature(type_str, intern_if_not_found, CHECK_NULL); |
550 } else if (java_lang_Class::is_instance(type_str)) { | 381 } else if (java_lang_Class::is_instance(type_str)) { |
551 return java_lang_Class::as_signature(type_str, false, CHECK_NULL); | 382 return java_lang_Class::as_signature(type_str, false, CHECK_NULL); |
552 } else if (java_lang_String::is_instance(type_str)) { | 383 } else if (java_lang_String::is_instance(type_str)) { |
553 if (polymorphic) { | 384 if (intern_if_not_found) { |
554 return java_lang_String::as_symbol(type_str, CHECK_NULL); | 385 return java_lang_String::as_symbol(type_str, CHECK_NULL); |
555 } else { | 386 } else { |
556 return java_lang_String::as_symbol_or_null(type_str); | 387 return java_lang_String::as_symbol_or_null(type_str); |
557 } | 388 } |
558 } else { | 389 } else { |
559 THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized type", NULL); | 390 THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized type", NULL); |
560 } | 391 } |
561 } | 392 } |
562 | 393 |
394 static const char OBJ_SIG[] = "Ljava/lang/Object;"; | |
395 enum { OBJ_SIG_LEN = 18 }; | |
396 | |
397 bool MethodHandles::is_basic_type_signature(Symbol* sig) { | |
398 assert(vmSymbols::object_signature()->utf8_length() == (int)OBJ_SIG_LEN, ""); | |
399 assert(vmSymbols::object_signature()->equals(OBJ_SIG), ""); | |
400 const int len = sig->utf8_length(); | |
401 for (int i = 0; i < len; i++) { | |
402 switch (sig->byte_at(i)) { | |
403 case 'L': | |
404 // only java/lang/Object is valid here | |
405 if (sig->index_of_at(i, OBJ_SIG, OBJ_SIG_LEN) != i) | |
406 return false; | |
407 i += OBJ_SIG_LEN-1; //-1 because of i++ in loop | |
408 continue; | |
409 case '(': case ')': case 'V': | |
410 case 'I': case 'J': case 'F': case 'D': | |
411 continue; | |
412 //case '[': | |
413 //case 'Z': case 'B': case 'C': case 'S': | |
414 default: | |
415 return false; | |
416 } | |
417 } | |
418 return true; | |
419 } | |
420 | |
421 Symbol* MethodHandles::lookup_basic_type_signature(Symbol* sig, bool keep_last_arg, TRAPS) { | |
422 Symbol* bsig = NULL; | |
423 if (sig == NULL) { | |
424 return sig; | |
425 } else if (is_basic_type_signature(sig)) { | |
426 sig->increment_refcount(); | |
427 return sig; // that was easy | |
428 } else if (sig->byte_at(0) != '(') { | |
429 BasicType bt = char2type(sig->byte_at(0)); | |
430 if (is_subword_type(bt)) { | |
431 bsig = vmSymbols::int_signature(); | |
432 } else { | |
433 assert(bt == T_OBJECT || bt == T_ARRAY, "is_basic_type_signature was false"); | |
434 bsig = vmSymbols::object_signature(); | |
435 } | |
436 } else { | |
437 ResourceMark rm; | |
438 stringStream buffer(128); | |
439 buffer.put('('); | |
440 int arg_pos = 0, keep_arg_pos = -1; | |
441 if (keep_last_arg) | |
442 keep_arg_pos = ArgumentCount(sig).size() - 1; | |
443 for (SignatureStream ss(sig); !ss.is_done(); ss.next()) { | |
444 BasicType bt = ss.type(); | |
445 size_t this_arg_pos = buffer.size(); | |
446 if (ss.at_return_type()) { | |
447 buffer.put(')'); | |
448 } | |
449 if (arg_pos == keep_arg_pos) { | |
450 buffer.write((char*) ss.raw_bytes(), | |
451 (int) ss.raw_length()); | |
452 } else if (bt == T_OBJECT || bt == T_ARRAY) { | |
453 buffer.write(OBJ_SIG, OBJ_SIG_LEN); | |
454 } else { | |
455 if (is_subword_type(bt)) | |
456 bt = T_INT; | |
457 buffer.put(type2char(bt)); | |
458 } | |
459 arg_pos++; | |
460 } | |
461 const char* sigstr = buffer.base(); | |
462 int siglen = (int) buffer.size(); | |
463 bsig = SymbolTable::new_symbol(sigstr, siglen, THREAD); | |
464 } | |
465 assert(is_basic_type_signature(bsig) || | |
466 // detune assert in case the injected argument is not a basic type: | |
467 keep_last_arg, ""); | |
468 return bsig; | |
469 } | |
470 | |
471 void MethodHandles::print_as_basic_type_signature_on(outputStream* st, | |
472 Symbol* sig, | |
473 bool keep_arrays, | |
474 bool keep_basic_names) { | |
475 st = st ? st : tty; | |
476 int len = sig->utf8_length(); | |
477 int array = 0; | |
478 bool prev_type = false; | |
479 for (int i = 0; i < len; i++) { | |
480 char ch = sig->byte_at(i); | |
481 switch (ch) { | |
482 case '(': case ')': | |
483 prev_type = false; | |
484 st->put(ch); | |
485 continue; | |
486 case '[': | |
487 if (!keep_basic_names && keep_arrays) | |
488 st->put(ch); | |
489 array++; | |
490 continue; | |
491 case 'L': | |
492 { | |
493 if (prev_type) st->put(','); | |
494 int start = i+1, slash = start; | |
495 while (++i < len && (ch = sig->byte_at(i)) != ';') { | |
496 if (ch == '/' || ch == '.' || ch == '$') slash = i+1; | |
497 } | |
498 if (slash < i) start = slash; | |
499 if (!keep_basic_names) { | |
500 st->put('L'); | |
501 } else { | |
502 for (int j = start; j < i; j++) | |
503 st->put(sig->byte_at(j)); | |
504 prev_type = true; | |
505 } | |
506 break; | |
507 } | |
508 default: | |
509 { | |
510 if (array && char2type(ch) != T_ILLEGAL && !keep_arrays) { | |
511 ch = '['; | |
512 array = 0; | |
513 } | |
514 if (prev_type) st->put(','); | |
515 const char* n = NULL; | |
516 if (keep_basic_names) | |
517 n = type2name(char2type(ch)); | |
518 if (n == NULL) { | |
519 // unknown letter, or we don't want to know its name | |
520 st->put(ch); | |
521 } else { | |
522 st->print(n); | |
523 prev_type = true; | |
524 } | |
525 break; | |
526 } | |
527 } | |
528 // Switch break goes here to take care of array suffix: | |
529 if (prev_type) { | |
530 while (array > 0) { | |
531 st->print("[]"); | |
532 --array; | |
533 } | |
534 } | |
535 array = 0; | |
536 } | |
537 } | |
538 | |
539 | |
540 | |
541 static oop object_java_mirror() { | |
542 return Klass::cast(SystemDictionary::Object_klass())->java_mirror(); | |
543 } | |
544 | |
545 static oop field_name_or_null(Symbol* s) { | |
546 if (s == NULL) return NULL; | |
547 return StringTable::lookup(s); | |
548 } | |
549 | |
550 static oop field_signature_type_or_null(Symbol* s) { | |
551 if (s == NULL) return NULL; | |
552 BasicType bt = FieldType::basic_type(s); | |
553 if (is_java_primitive(bt)) { | |
554 assert(s->utf8_length() == 1, ""); | |
555 return java_lang_Class::primitive_mirror(bt); | |
556 } | |
557 // Here are some more short cuts for common types. | |
558 // They are optional, since reference types can be resolved lazily. | |
559 if (bt == T_OBJECT) { | |
560 if (s == vmSymbols::object_signature()) { | |
561 return object_java_mirror(); | |
562 } else if (s == vmSymbols::class_signature()) { | |
563 return Klass::cast(SystemDictionary::Class_klass())->java_mirror(); | |
564 } else if (s == vmSymbols::string_signature()) { | |
565 return Klass::cast(SystemDictionary::String_klass())->java_mirror(); | |
566 } else { | |
567 int len = s->utf8_length(); | |
568 if (s->byte_at(0) == 'L' && s->byte_at(len-1) == ';') { | |
569 TempNewSymbol cname = SymbolTable::probe((const char*)&s->bytes()[1], len-2); | |
570 if (cname == NULL) return NULL; | |
571 klassOop wkk = SystemDictionary::find_well_known_klass(cname); | |
572 if (wkk == NULL) return NULL; | |
573 return Klass::cast(wkk)->java_mirror(); | |
574 } | |
575 } | |
576 } | |
577 return NULL; | |
578 } | |
579 | |
563 // An unresolved member name is a mere symbolic reference. | 580 // An unresolved member name is a mere symbolic reference. |
564 // Resolving it plants a vmtarget/vmindex in it, | 581 // Resolving it plants a vmtarget/vmindex in it, |
565 // which refers dirctly to JVM internals. | 582 // which refers dirctly to JVM internals. |
566 void MethodHandles::resolve_MemberName(Handle mname, TRAPS) { | 583 Handle MethodHandles::resolve_MemberName(Handle mname, TRAPS) { |
584 Handle empty; | |
567 assert(java_lang_invoke_MemberName::is_instance(mname()), ""); | 585 assert(java_lang_invoke_MemberName::is_instance(mname()), ""); |
568 #ifdef ASSERT | 586 |
569 // If this assert throws, renegotiate the sentinel value used by the Java code, | 587 if (java_lang_invoke_MemberName::vmtarget(mname()) != NULL) { |
570 // so that it is distinct from any valid vtable index value, and any special | 588 // Already resolved. |
571 // values defined in methodOopDesc::VtableIndexFlag. | 589 DEBUG_ONLY(int vmindex = java_lang_invoke_MemberName::vmindex(mname())); |
572 // The point of the slop is to give the Java code and the JVM some room | 590 assert(vmindex >= methodOopDesc::nonvirtual_vtable_index, ""); |
573 // to independently specify sentinel values. | 591 return mname; |
574 const int sentinel_slop = 10; | 592 } |
575 const int sentinel_limit = methodOopDesc::highest_unused_vtable_index_value - sentinel_slop; | 593 |
576 assert(VM_INDEX_UNINITIALIZED < sentinel_limit, "Java sentinel != JVM sentinels"); | |
577 #endif | |
578 if (java_lang_invoke_MemberName::vmindex(mname()) != VM_INDEX_UNINITIALIZED) | |
579 return; // already resolved | |
580 Handle defc_oop(THREAD, java_lang_invoke_MemberName::clazz(mname())); | 594 Handle defc_oop(THREAD, java_lang_invoke_MemberName::clazz(mname())); |
581 Handle name_str(THREAD, java_lang_invoke_MemberName::name( mname())); | 595 Handle name_str(THREAD, java_lang_invoke_MemberName::name( mname())); |
582 Handle type_str(THREAD, java_lang_invoke_MemberName::type( mname())); | 596 Handle type_str(THREAD, java_lang_invoke_MemberName::type( mname())); |
583 int flags = java_lang_invoke_MemberName::flags(mname()); | 597 int flags = java_lang_invoke_MemberName::flags(mname()); |
598 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK; | |
599 if (!ref_kind_is_valid(ref_kind)) { | |
600 THROW_MSG_(vmSymbols::java_lang_InternalError(), "obsolete MemberName format", empty); | |
601 } | |
602 | |
603 DEBUG_ONLY(int old_vmindex); | |
604 assert((old_vmindex = java_lang_invoke_MemberName::vmindex(mname())) == 0, "clean input"); | |
584 | 605 |
585 if (defc_oop.is_null() || name_str.is_null() || type_str.is_null()) { | 606 if (defc_oop.is_null() || name_str.is_null() || type_str.is_null()) { |
586 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to resolve"); | 607 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "nothing to resolve", empty); |
587 } | 608 } |
588 | 609 |
589 instanceKlassHandle defc; | 610 instanceKlassHandle defc; |
590 { | 611 { |
591 klassOop defc_klassOop = java_lang_Class::as_klassOop(defc_oop()); | 612 klassOop defc_klassOop = java_lang_Class::as_klassOop(defc_oop()); |
592 if (defc_klassOop == NULL) return; // a primitive; no resolution possible | 613 if (defc_klassOop == NULL) return empty; // a primitive; no resolution possible |
593 if (!Klass::cast(defc_klassOop)->oop_is_instance()) { | 614 if (!Klass::cast(defc_klassOop)->oop_is_instance()) { |
594 if (!Klass::cast(defc_klassOop)->oop_is_array()) return; | 615 if (!Klass::cast(defc_klassOop)->oop_is_array()) return empty; |
595 defc_klassOop = SystemDictionary::Object_klass(); | 616 defc_klassOop = SystemDictionary::Object_klass(); |
596 } | 617 } |
597 defc = instanceKlassHandle(THREAD, defc_klassOop); | 618 defc = instanceKlassHandle(THREAD, defc_klassOop); |
598 } | 619 } |
599 if (defc.is_null()) { | 620 if (defc.is_null()) { |
600 THROW_MSG(vmSymbols::java_lang_InternalError(), "primitive class"); | 621 THROW_MSG_(vmSymbols::java_lang_InternalError(), "primitive class", empty); |
601 } | 622 } |
602 defc->link_class(CHECK); // possible safepoint | 623 defc->link_class(CHECK_(empty)); // possible safepoint |
603 | 624 |
604 // convert the external string name to an internal symbol | 625 // convert the external string name to an internal symbol |
605 TempNewSymbol name = java_lang_String::as_symbol_or_null(name_str()); | 626 TempNewSymbol name = java_lang_String::as_symbol_or_null(name_str()); |
606 if (name == NULL) return; // no such name | 627 if (name == NULL) return empty; // no such name |
607 if (name == vmSymbols::class_initializer_name()) | 628 if (name == vmSymbols::class_initializer_name()) |
608 return; // illegal name | 629 return empty; // illegal name |
609 | 630 |
610 Handle polymorphic_method_type; | 631 vmIntrinsics::ID mh_invoke_id = vmIntrinsics::_none; |
611 bool polymorphic_signature = false; | |
612 if ((flags & ALL_KINDS) == IS_METHOD && | 632 if ((flags & ALL_KINDS) == IS_METHOD && |
613 (defc() == SystemDictionary::MethodHandle_klass() && | 633 (defc() == SystemDictionary::MethodHandle_klass()) && |
614 methodOopDesc::is_method_handle_invoke_name(name))) { | 634 (ref_kind == JVM_REF_invokeVirtual || |
615 polymorphic_signature = true; | 635 ref_kind == JVM_REF_invokeSpecial || |
636 // static invocation mode is required for _linkToVirtual, etc.: | |
637 ref_kind == JVM_REF_invokeStatic)) { | |
638 vmIntrinsics::ID iid = signature_polymorphic_name_id(name); | |
639 if (iid != vmIntrinsics::_none && | |
640 ((ref_kind == JVM_REF_invokeStatic) == is_signature_polymorphic_static(iid))) { | |
641 // Virtual methods invoke and invokeExact, plus internal invokers like _invokeBasic. | |
642 // For a static reference it could an internal linkage routine like _linkToVirtual, etc. | |
643 mh_invoke_id = iid; | |
644 } | |
616 } | 645 } |
617 | 646 |
618 // convert the external string or reflective type to an internal signature | 647 // convert the external string or reflective type to an internal signature |
619 TempNewSymbol type = convert_to_signature(type_str(), polymorphic_signature, CHECK); | 648 TempNewSymbol type = lookup_signature(type_str(), (mh_invoke_id != vmIntrinsics::_none), CHECK_(empty)); |
620 if (java_lang_invoke_MethodType::is_instance(type_str()) && polymorphic_signature) { | 649 if (type == NULL) return empty; // no such signature exists in the VM |
621 polymorphic_method_type = type_str; // preserve exactly | |
622 } | |
623 if (type == NULL) return; // no such signature exists in the VM | |
624 | 650 |
625 // Time to do the lookup. | 651 // Time to do the lookup. |
626 switch (flags & ALL_KINDS) { | 652 switch (flags & ALL_KINDS) { |
627 case IS_METHOD: | 653 case IS_METHOD: |
628 { | 654 { |
629 CallInfo result; | 655 CallInfo result; |
656 bool do_dispatch = true; // default, neutral setting | |
630 { | 657 { |
631 EXCEPTION_MARK; | 658 assert(!HAS_PENDING_EXCEPTION, ""); |
632 if ((flags & JVM_ACC_STATIC) != 0) { | 659 if (ref_kind == JVM_REF_invokeStatic) { |
660 //do_dispatch = false; // no need, since statics are never dispatched | |
633 LinkResolver::resolve_static_call(result, | 661 LinkResolver::resolve_static_call(result, |
634 defc, name, type, KlassHandle(), false, false, THREAD); | 662 defc, name, type, KlassHandle(), false, false, THREAD); |
635 } else if (defc->is_interface()) { | 663 } else if (ref_kind == JVM_REF_invokeInterface) { |
636 LinkResolver::resolve_interface_call(result, Handle(), defc, | 664 LinkResolver::resolve_interface_call(result, Handle(), defc, |
637 defc, name, type, KlassHandle(), false, false, THREAD); | 665 defc, name, type, KlassHandle(), false, false, THREAD); |
638 } else { | 666 } else if (mh_invoke_id != vmIntrinsics::_none) { |
667 assert(!is_signature_polymorphic_static(mh_invoke_id), ""); | |
668 LinkResolver::resolve_handle_call(result, | |
669 defc, name, type, KlassHandle(), THREAD); | |
670 } else if (ref_kind == JVM_REF_invokeSpecial) { | |
671 do_dispatch = false; // force non-virtual linkage | |
672 LinkResolver::resolve_special_call(result, | |
673 defc, name, type, KlassHandle(), false, THREAD); | |
674 } else if (ref_kind == JVM_REF_invokeVirtual) { | |
639 LinkResolver::resolve_virtual_call(result, Handle(), defc, | 675 LinkResolver::resolve_virtual_call(result, Handle(), defc, |
640 defc, name, type, KlassHandle(), false, false, THREAD); | 676 defc, name, type, KlassHandle(), false, false, THREAD); |
677 } else { | |
678 assert(false, err_msg("ref_kind=%d", ref_kind)); | |
641 } | 679 } |
642 if (HAS_PENDING_EXCEPTION) { | 680 if (HAS_PENDING_EXCEPTION) { |
643 CLEAR_PENDING_EXCEPTION; | 681 return empty; |
644 break; // go to second chance | |
645 } | 682 } |
646 } | 683 } |
647 methodHandle m = result.resolved_method(); | 684 return init_method_MemberName(mname(), result, THREAD); |
648 oop vmtarget = NULL; | |
649 int vmindex = methodOopDesc::nonvirtual_vtable_index; | |
650 if (defc->is_interface()) { | |
651 vmindex = klassItable::compute_itable_index(m()); | |
652 assert(vmindex >= 0, ""); | |
653 } else if (result.has_vtable_index()) { | |
654 vmindex = result.vtable_index(); | |
655 assert(vmindex >= 0, ""); | |
656 } | |
657 assert(vmindex != VM_INDEX_UNINITIALIZED, ""); | |
658 if (vmindex < 0) { | |
659 assert(result.is_statically_bound(), ""); | |
660 vmtarget = m(); | |
661 } else { | |
662 vmtarget = result.resolved_klass()->as_klassOop(); | |
663 } | |
664 int mods = (m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
665 java_lang_invoke_MemberName::set_vmtarget(mname(), vmtarget); | |
666 java_lang_invoke_MemberName::set_vmindex(mname(), vmindex); | |
667 java_lang_invoke_MemberName::set_modifiers(mname(), mods); | |
668 DEBUG_ONLY(KlassHandle junk1; int junk2); | |
669 assert(decode_MemberName(mname(), junk1, junk2) == result.resolved_method(), | |
670 "properly stored for later decoding"); | |
671 return; | |
672 } | 685 } |
673 case IS_CONSTRUCTOR: | 686 case IS_CONSTRUCTOR: |
674 { | 687 { |
675 CallInfo result; | 688 CallInfo result; |
676 { | 689 { |
677 EXCEPTION_MARK; | 690 assert(!HAS_PENDING_EXCEPTION, ""); |
678 if (name == vmSymbols::object_initializer_name()) { | 691 if (name == vmSymbols::object_initializer_name()) { |
679 LinkResolver::resolve_special_call(result, | 692 LinkResolver::resolve_special_call(result, |
680 defc, name, type, KlassHandle(), false, THREAD); | 693 defc, name, type, KlassHandle(), false, THREAD); |
681 } else { | 694 } else { |
682 break; // will throw after end of switch | 695 break; // will throw after end of switch |
683 } | 696 } |
684 if (HAS_PENDING_EXCEPTION) { | 697 if (HAS_PENDING_EXCEPTION) { |
685 CLEAR_PENDING_EXCEPTION; | 698 return empty; |
686 return; | |
687 } | 699 } |
688 } | 700 } |
689 assert(result.is_statically_bound(), ""); | 701 assert(result.is_statically_bound(), ""); |
690 methodHandle m = result.resolved_method(); | 702 return init_method_MemberName(mname(), result, THREAD); |
691 oop vmtarget = m(); | |
692 int vmindex = methodOopDesc::nonvirtual_vtable_index; | |
693 int mods = (m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
694 java_lang_invoke_MemberName::set_vmtarget(mname(), vmtarget); | |
695 java_lang_invoke_MemberName::set_vmindex(mname(), vmindex); | |
696 java_lang_invoke_MemberName::set_modifiers(mname(), mods); | |
697 DEBUG_ONLY(KlassHandle junk1; int junk2); | |
698 assert(decode_MemberName(mname(), junk1, junk2) == result.resolved_method(), | |
699 "properly stored for later decoding"); | |
700 return; | |
701 } | 703 } |
702 case IS_FIELD: | 704 case IS_FIELD: |
703 { | 705 { |
704 // This is taken from LinkResolver::resolve_field, sans access checks. | 706 // This is taken from LinkResolver::resolve_field, sans access checks. |
705 fieldDescriptor fd; // find_field initializes fd if found | 707 fieldDescriptor fd; // find_field initializes fd if found |
706 KlassHandle sel_klass(THREAD, instanceKlass::cast(defc())->find_field(name, type, &fd)); | 708 KlassHandle sel_klass(THREAD, instanceKlass::cast(defc())->find_field(name, type, &fd)); |
707 // check if field exists; i.e., if a klass containing the field def has been selected | 709 // check if field exists; i.e., if a klass containing the field def has been selected |
708 if (sel_klass.is_null()) return; | 710 if (sel_klass.is_null()) return empty; // should not happen |
709 oop vmtarget = sel_klass->as_klassOop(); | 711 oop type = field_signature_type_or_null(fd.signature()); |
710 int vmindex = fd.offset(); | 712 oop name = field_name_or_null(fd.name()); |
711 int mods = (fd.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS); | 713 bool is_setter = (ref_kind_is_valid(ref_kind) && ref_kind_is_setter(ref_kind)); |
712 if (vmindex == VM_INDEX_UNINITIALIZED) break; // should not happen | 714 mname = Handle(THREAD, |
713 java_lang_invoke_MemberName::set_vmtarget(mname(), vmtarget); | 715 init_field_MemberName(mname(), sel_klass->as_klassOop(), |
714 java_lang_invoke_MemberName::set_vmindex(mname(), vmindex); | 716 fd.access_flags(), type, name, fd.offset(), is_setter)); |
715 java_lang_invoke_MemberName::set_modifiers(mname(), mods); | 717 return mname; |
716 return; | |
717 } | 718 } |
718 default: | 719 default: |
719 THROW_MSG(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format"); | 720 THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format", empty); |
720 } | 721 } |
721 | 722 |
722 // Second chance. | 723 return empty; |
723 if (polymorphic_method_type.not_null()) { | |
724 // Look on a non-null class loader. | |
725 Handle cur_class_loader; | |
726 const int nptypes = java_lang_invoke_MethodType::ptype_count(polymorphic_method_type()); | |
727 for (int i = 0; i <= nptypes; i++) { | |
728 oop type_mirror; | |
729 if (i < nptypes) type_mirror = java_lang_invoke_MethodType::ptype(polymorphic_method_type(), i); | |
730 else type_mirror = java_lang_invoke_MethodType::rtype(polymorphic_method_type()); | |
731 klassOop example_type = java_lang_Class::as_klassOop(type_mirror); | |
732 if (example_type == NULL) continue; | |
733 oop class_loader = Klass::cast(example_type)->class_loader(); | |
734 if (class_loader == NULL || class_loader == cur_class_loader()) continue; | |
735 cur_class_loader = Handle(THREAD, class_loader); | |
736 methodOop m = SystemDictionary::find_method_handle_invoke(name, | |
737 type, | |
738 KlassHandle(THREAD, example_type), | |
739 THREAD); | |
740 if (HAS_PENDING_EXCEPTION) { | |
741 CLEAR_PENDING_EXCEPTION; | |
742 m = NULL; | |
743 // try again with a different class loader... | |
744 } | |
745 if (m != NULL && | |
746 m->is_method_handle_invoke() && | |
747 java_lang_invoke_MethodType::equals(polymorphic_method_type(), m->method_handle_type())) { | |
748 int mods = (m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
749 java_lang_invoke_MemberName::set_vmtarget(mname(), m); | |
750 java_lang_invoke_MemberName::set_vmindex(mname(), m->vtable_index()); | |
751 java_lang_invoke_MemberName::set_modifiers(mname(), mods); | |
752 return; | |
753 } | |
754 } | |
755 } | |
756 } | 724 } |
757 | 725 |
758 // Conversely, a member name which is only initialized from JVM internals | 726 // Conversely, a member name which is only initialized from JVM internals |
759 // may have null defc, name, and type fields. | 727 // may have null defc, name, and type fields. |
760 // Resolving it plants a vmtarget/vmindex in it, | 728 // Resolving it plants a vmtarget/vmindex in it, |
761 // which refers directly to JVM internals. | 729 // which refers directly to JVM internals. |
762 void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) { | 730 void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) { |
763 assert(java_lang_invoke_MemberName::is_instance(mname()), ""); | 731 assert(java_lang_invoke_MemberName::is_instance(mname()), ""); |
764 oop vmtarget = java_lang_invoke_MemberName::vmtarget(mname()); | 732 oop vmtarget = java_lang_invoke_MemberName::vmtarget(mname()); |
765 int vmindex = java_lang_invoke_MemberName::vmindex(mname()); | 733 int vmindex = java_lang_invoke_MemberName::vmindex(mname()); |
766 if (vmtarget == NULL || vmindex == VM_INDEX_UNINITIALIZED) { | 734 if (vmtarget == NULL) { |
767 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand"); | 735 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand"); |
768 } | 736 } |
769 | 737 |
770 bool have_defc = (java_lang_invoke_MemberName::clazz(mname()) != NULL); | 738 bool have_defc = (java_lang_invoke_MemberName::clazz(mname()) != NULL); |
771 bool have_name = (java_lang_invoke_MemberName::name(mname()) != NULL); | 739 bool have_name = (java_lang_invoke_MemberName::name(mname()) != NULL); |
782 | 750 |
783 switch (flags & ALL_KINDS) { | 751 switch (flags & ALL_KINDS) { |
784 case IS_METHOD: | 752 case IS_METHOD: |
785 case IS_CONSTRUCTOR: | 753 case IS_CONSTRUCTOR: |
786 { | 754 { |
787 KlassHandle receiver_limit; int decode_flags = 0; | 755 assert(vmtarget->is_method(), "method or constructor vmtarget is methodOop"); |
788 methodHandle m = decode_vmtarget(vmtarget, vmindex, NULL, receiver_limit, decode_flags); | 756 methodHandle m(THREAD, methodOop(vmtarget)); |
757 DEBUG_ONLY(vmtarget = NULL); // safety | |
789 if (m.is_null()) break; | 758 if (m.is_null()) break; |
790 if (!have_defc) { | 759 if (!have_defc) { |
791 klassOop defc = m->method_holder(); | 760 klassOop defc = m->method_holder(); |
792 if (receiver_limit.not_null() && receiver_limit() != defc | |
793 && Klass::cast(receiver_limit())->is_subtype_of(defc)) | |
794 defc = receiver_limit(); | |
795 java_lang_invoke_MemberName::set_clazz(mname(), Klass::cast(defc)->java_mirror()); | 761 java_lang_invoke_MemberName::set_clazz(mname(), Klass::cast(defc)->java_mirror()); |
796 } | 762 } |
797 if (!have_name) { | 763 if (!have_name) { |
798 //not java_lang_String::create_from_symbol; let's intern member names | 764 //not java_lang_String::create_from_symbol; let's intern member names |
799 Handle name = StringTable::intern(m->name(), CHECK); | 765 Handle name = StringTable::intern(m->name(), CHECK); |
806 return; | 772 return; |
807 } | 773 } |
808 case IS_FIELD: | 774 case IS_FIELD: |
809 { | 775 { |
810 // This is taken from LinkResolver::resolve_field, sans access checks. | 776 // This is taken from LinkResolver::resolve_field, sans access checks. |
811 if (!vmtarget->is_klass()) break; | 777 assert(vmtarget->is_klass(), "field vmtarget is klassOop"); |
812 if (!Klass::cast((klassOop) vmtarget)->oop_is_instance()) break; | 778 if (!Klass::cast((klassOop) vmtarget)->oop_is_instance()) break; |
813 instanceKlassHandle defc(THREAD, (klassOop) vmtarget); | 779 instanceKlassHandle defc(THREAD, (klassOop) vmtarget); |
780 DEBUG_ONLY(vmtarget = NULL); // safety | |
814 bool is_static = ((flags & JVM_ACC_STATIC) != 0); | 781 bool is_static = ((flags & JVM_ACC_STATIC) != 0); |
815 fieldDescriptor fd; // find_field initializes fd if found | 782 fieldDescriptor fd; // find_field initializes fd if found |
816 if (!defc->find_field_from_offset(vmindex, is_static, &fd)) | 783 if (!defc->find_field_from_offset(vmindex, is_static, &fd)) |
817 break; // cannot expand | 784 break; // cannot expand |
818 if (!have_defc) { | 785 if (!have_defc) { |
822 //not java_lang_String::create_from_symbol; let's intern member names | 789 //not java_lang_String::create_from_symbol; let's intern member names |
823 Handle name = StringTable::intern(fd.name(), CHECK); | 790 Handle name = StringTable::intern(fd.name(), CHECK); |
824 java_lang_invoke_MemberName::set_name(mname(), name()); | 791 java_lang_invoke_MemberName::set_name(mname(), name()); |
825 } | 792 } |
826 if (!have_type) { | 793 if (!have_type) { |
827 Handle type = java_lang_String::create_from_symbol(fd.signature(), CHECK); | 794 // If it is a primitive field type, don't mess with short strings like "I". |
795 Handle type = field_signature_type_or_null(fd.signature()); | |
796 if (type.is_null()) { | |
797 java_lang_String::create_from_symbol(fd.signature(), CHECK); | |
798 } | |
828 java_lang_invoke_MemberName::set_type(mname(), type()); | 799 java_lang_invoke_MemberName::set_type(mname(), type()); |
829 } | 800 } |
830 return; | 801 return; |
831 } | 802 } |
832 } | 803 } |
880 --rskip; | 851 --rskip; |
881 } else if (rfill < rlimit) { | 852 } else if (rfill < rlimit) { |
882 oop result = results->obj_at(rfill++); | 853 oop result = results->obj_at(rfill++); |
883 if (!java_lang_invoke_MemberName::is_instance(result)) | 854 if (!java_lang_invoke_MemberName::is_instance(result)) |
884 return -99; // caller bug! | 855 return -99; // caller bug! |
885 MethodHandles::init_MemberName(result, st.klass()->as_klassOop(), st.access_flags(), st.offset()); | 856 oop type = field_signature_type_or_null(st.signature()); |
857 oop name = field_name_or_null(st.name()); | |
858 oop saved = MethodHandles::init_field_MemberName(result, st.klass()->as_klassOop(), | |
859 st.access_flags(), type, name, | |
860 st.offset()); | |
861 if (saved != result) | |
862 results->obj_at_put(rfill-1, saved); // show saved instance to user | |
886 } else if (++overflow >= overflow_limit) { | 863 } else if (++overflow >= overflow_limit) { |
887 match_flags = 0; break; // got tired of looking at overflow | 864 match_flags = 0; break; // got tired of looking at overflow |
888 } | 865 } |
889 } | 866 } |
890 } | 867 } |
928 --rskip; | 905 --rskip; |
929 } else if (rfill < rlimit) { | 906 } else if (rfill < rlimit) { |
930 oop result = results->obj_at(rfill++); | 907 oop result = results->obj_at(rfill++); |
931 if (!java_lang_invoke_MemberName::is_instance(result)) | 908 if (!java_lang_invoke_MemberName::is_instance(result)) |
932 return -99; // caller bug! | 909 return -99; // caller bug! |
933 MethodHandles::init_MemberName(result, m, true); | 910 oop saved = MethodHandles::init_method_MemberName(result, m, true, NULL); |
911 if (saved != result) | |
912 results->obj_at_put(rfill-1, saved); // show saved instance to user | |
934 } else if (++overflow >= overflow_limit) { | 913 } else if (++overflow >= overflow_limit) { |
935 match_flags = 0; break; // got tired of looking at overflow | 914 match_flags = 0; break; // got tired of looking at overflow |
936 } | 915 } |
937 } | 916 } |
938 } | 917 } |
939 | 918 |
940 // return number of elements we at leasted wanted to initialize | 919 // return number of elements we at leasted wanted to initialize |
941 return rfill + overflow; | 920 return rfill + overflow; |
942 } | 921 } |
943 | 922 |
944 | |
945 // Decode this java.lang.Class object into an instanceKlass, if possible. | |
946 // Throw IAE if not | |
947 instanceKlassHandle MethodHandles::resolve_instance_klass(oop java_mirror_oop, TRAPS) { | |
948 instanceKlassHandle empty; | |
949 klassOop caller = NULL; | |
950 if (java_lang_Class::is_instance(java_mirror_oop)) { | |
951 caller = java_lang_Class::as_klassOop(java_mirror_oop); | |
952 } | |
953 if (caller == NULL || !Klass::cast(caller)->oop_is_instance()) { | |
954 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not a class", empty); | |
955 } | |
956 return instanceKlassHandle(THREAD, caller); | |
957 } | |
958 | |
959 | |
960 | |
961 // Decode the vmtarget field of a method handle. | |
962 // Sanitize out methodOops, klassOops, and any other non-Java data. | |
963 // This is for debugging and reflection. | |
964 oop MethodHandles::encode_target(Handle mh, int format, TRAPS) { | |
965 assert(java_lang_invoke_MethodHandle::is_instance(mh()), "must be a MH"); | |
966 if (format == ETF_FORCE_DIRECT_HANDLE || | |
967 format == ETF_COMPILE_DIRECT_HANDLE) { | |
968 // Internal function for stress testing. | |
969 Handle mt = java_lang_invoke_MethodHandle::type(mh()); | |
970 int invocation_count = 10000; | |
971 TempNewSymbol signature = java_lang_invoke_MethodType::as_signature(mt(), true, CHECK_NULL); | |
972 bool omit_receiver_argument = true; | |
973 MethodHandleCompiler mhc(mh, vmSymbols::invoke_name(), signature, invocation_count, omit_receiver_argument, CHECK_NULL); | |
974 methodHandle m = mhc.compile(CHECK_NULL); | |
975 if (StressMethodHandleWalk && Verbose || PrintMiscellaneous) { | |
976 tty->print_cr("MethodHandleNatives.getTarget(%s)", | |
977 format == ETF_FORCE_DIRECT_HANDLE ? "FORCE_DIRECT" : "COMPILE_DIRECT"); | |
978 if (Verbose) { | |
979 m->print_codes(); | |
980 } | |
981 } | |
982 if (StressMethodHandleWalk) { | |
983 InterpreterOopMap mask; | |
984 OopMapCache::compute_one_oop_map(m, m->code_size() - 1, &mask); | |
985 } | |
986 if ((format == ETF_COMPILE_DIRECT_HANDLE || | |
987 CompilationPolicy::must_be_compiled(m)) | |
988 && !instanceKlass::cast(m->method_holder())->is_not_initialized() | |
989 && CompilationPolicy::can_be_compiled(m)) { | |
990 // Force compilation | |
991 CompileBroker::compile_method(m, InvocationEntryBci, | |
992 CompilationPolicy::policy()->initial_compile_level(), | |
993 methodHandle(), 0, "MethodHandleNatives.getTarget", | |
994 CHECK_NULL); | |
995 } | |
996 // Now wrap m in a DirectMethodHandle. | |
997 instanceKlassHandle dmh_klass(THREAD, SystemDictionary::DirectMethodHandle_klass()); | |
998 Handle dmh = dmh_klass->allocate_instance_handle(CHECK_NULL); | |
999 JavaValue ignore_result(T_VOID); | |
1000 Symbol* init_name = vmSymbols::object_initializer_name(); | |
1001 Symbol* init_sig = vmSymbols::notifyGenericMethodType_signature(); | |
1002 JavaCalls::call_special(&ignore_result, dmh, | |
1003 SystemDictionaryHandles::MethodHandle_klass(), init_name, init_sig, | |
1004 java_lang_invoke_MethodHandle::type(mh()), CHECK_NULL); | |
1005 MethodHandles::init_DirectMethodHandle(dmh, m, false, CHECK_NULL); | |
1006 return dmh(); | |
1007 } | |
1008 if (format == ETF_HANDLE_OR_METHOD_NAME) { | |
1009 oop target = java_lang_invoke_MethodHandle::vmtarget(mh()); | |
1010 if (target == NULL) { | |
1011 return NULL; // unformed MH | |
1012 } | |
1013 klassOop tklass = target->klass(); | |
1014 if (Klass::cast(tklass)->is_subclass_of(SystemDictionary::Object_klass())) { | |
1015 return target; // target is another MH (or something else?) | |
1016 } | |
1017 } | |
1018 if (format == ETF_DIRECT_HANDLE) { | |
1019 oop target = mh(); | |
1020 for (;;) { | |
1021 if (target->klass() == SystemDictionary::DirectMethodHandle_klass()) { | |
1022 return target; | |
1023 } | |
1024 if (!java_lang_invoke_MethodHandle::is_instance(target)){ | |
1025 return NULL; // unformed MH | |
1026 } | |
1027 target = java_lang_invoke_MethodHandle::vmtarget(target); | |
1028 } | |
1029 } | |
1030 // cases of metadata in MH.vmtarget: | |
1031 // - AMH can have methodOop for static invoke with bound receiver | |
1032 // - DMH can have methodOop for static invoke (on variable receiver) | |
1033 // - DMH can have klassOop for dispatched (non-static) invoke | |
1034 KlassHandle receiver_limit; int decode_flags = 0; | |
1035 methodHandle m = decode_MethodHandle(mh(), receiver_limit, decode_flags); | |
1036 if (m.is_null()) return NULL; | |
1037 switch (format) { | |
1038 case ETF_REFLECT_METHOD: | |
1039 // same as jni_ToReflectedMethod: | |
1040 if (m->is_initializer()) { | |
1041 return Reflection::new_constructor(m, THREAD); | |
1042 } else { | |
1043 return Reflection::new_method(m, UseNewReflection, false, THREAD); | |
1044 } | |
1045 | |
1046 case ETF_HANDLE_OR_METHOD_NAME: // method, not handle | |
1047 case ETF_METHOD_NAME: | |
1048 { | |
1049 if (SystemDictionary::MemberName_klass() == NULL) break; | |
1050 instanceKlassHandle mname_klass(THREAD, SystemDictionary::MemberName_klass()); | |
1051 mname_klass->initialize(CHECK_NULL); | |
1052 Handle mname = mname_klass->allocate_instance_handle(CHECK_NULL); // possible safepoint | |
1053 java_lang_invoke_MemberName::set_vmindex(mname(), VM_INDEX_UNINITIALIZED); | |
1054 bool do_dispatch = ((decode_flags & MethodHandles::_dmf_does_dispatch) != 0); | |
1055 init_MemberName(mname(), m(), do_dispatch); | |
1056 expand_MemberName(mname, 0, CHECK_NULL); | |
1057 return mname(); | |
1058 } | |
1059 } | |
1060 | |
1061 // Unknown format code. | |
1062 char msg[50]; | |
1063 jio_snprintf(msg, sizeof(msg), "unknown getTarget format=%d", format); | |
1064 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), msg); | |
1065 } | |
1066 | |
1067 static const char* always_null_names[] = { | |
1068 "java/lang/Void", | |
1069 "java/lang/Null", | |
1070 //"java/lang/Nothing", | |
1071 "sun/dyn/empty/Empty", | |
1072 "sun/invoke/empty/Empty", | |
1073 NULL | |
1074 }; | |
1075 | |
1076 static bool is_always_null_type(klassOop klass) { | |
1077 if (klass == NULL) return false; // safety | |
1078 if (!Klass::cast(klass)->oop_is_instance()) return false; | |
1079 instanceKlass* ik = instanceKlass::cast(klass); | |
1080 // Must be on the boot class path: | |
1081 if (ik->class_loader() != NULL) return false; | |
1082 // Check the name. | |
1083 Symbol* name = ik->name(); | |
1084 for (int i = 0; ; i++) { | |
1085 const char* test_name = always_null_names[i]; | |
1086 if (test_name == NULL) break; | |
1087 if (name->equals(test_name)) | |
1088 return true; | |
1089 } | |
1090 return false; | |
1091 } | |
1092 | |
1093 bool MethodHandles::class_cast_needed(klassOop src, klassOop dst) { | |
1094 if (dst == NULL) return true; | |
1095 if (src == NULL) return (dst != SystemDictionary::Object_klass()); | |
1096 if (src == dst || dst == SystemDictionary::Object_klass()) | |
1097 return false; // quickest checks | |
1098 Klass* srck = Klass::cast(src); | |
1099 Klass* dstk = Klass::cast(dst); | |
1100 if (dstk->is_interface()) { | |
1101 // interface receivers can safely be viewed as untyped, | |
1102 // because interface calls always include a dynamic check | |
1103 //dstk = Klass::cast(SystemDictionary::Object_klass()); | |
1104 return false; | |
1105 } | |
1106 if (srck->is_interface()) { | |
1107 // interface arguments must be viewed as untyped | |
1108 //srck = Klass::cast(SystemDictionary::Object_klass()); | |
1109 return true; | |
1110 } | |
1111 if (is_always_null_type(src)) { | |
1112 // some source types are known to be never instantiated; | |
1113 // they represent references which are always null | |
1114 // such null references never fail to convert safely | |
1115 return false; | |
1116 } | |
1117 return !srck->is_subclass_of(dstk->as_klassOop()); | |
1118 } | |
1119 | |
1120 static oop object_java_mirror() { | |
1121 return Klass::cast(SystemDictionary::Object_klass())->java_mirror(); | |
1122 } | |
1123 | |
1124 bool MethodHandles::is_float_fixed_reinterpretation_cast(BasicType src, BasicType dst) { | |
1125 if (src == T_FLOAT) return dst == T_INT; | |
1126 if (src == T_INT) return dst == T_FLOAT; | |
1127 if (src == T_DOUBLE) return dst == T_LONG; | |
1128 if (src == T_LONG) return dst == T_DOUBLE; | |
1129 return false; | |
1130 } | |
1131 | |
1132 bool MethodHandles::same_basic_type_for_arguments(BasicType src, | |
1133 BasicType dst, | |
1134 bool raw, | |
1135 bool for_return) { | |
1136 if (for_return) { | |
1137 // return values can always be forgotten: | |
1138 if (dst == T_VOID) return true; | |
1139 if (src == T_VOID) return raw && (dst == T_INT); | |
1140 // We allow caller to receive a garbage int, which is harmless. | |
1141 // This trick is pulled by trusted code (see VerifyType.canPassRaw). | |
1142 } | |
1143 assert(src != T_VOID && dst != T_VOID, "should not be here"); | |
1144 if (src == dst) return true; | |
1145 if (type2size[src] != type2size[dst]) return false; | |
1146 if (src == T_OBJECT || dst == T_OBJECT) return false; | |
1147 if (raw) return true; // bitwise reinterpretation; caller guarantees safety | |
1148 // allow reinterpretation casts for integral widening | |
1149 if (is_subword_type(src)) { // subwords can fit in int or other subwords | |
1150 if (dst == T_INT) // any subword fits in an int | |
1151 return true; | |
1152 if (src == T_BOOLEAN) // boolean fits in any subword | |
1153 return is_subword_type(dst); | |
1154 if (src == T_BYTE && dst == T_SHORT) | |
1155 return true; // remaining case: byte fits in short | |
1156 } | |
1157 // allow float/fixed reinterpretation casts | |
1158 if (is_float_fixed_reinterpretation_cast(src, dst)) | |
1159 return true; | |
1160 return false; | |
1161 } | |
1162 | |
1163 const char* MethodHandles::check_method_receiver(methodOop m, | |
1164 klassOop passed_recv_type) { | |
1165 assert(!m->is_static(), "caller resp."); | |
1166 if (passed_recv_type == NULL) | |
1167 return "receiver type is primitive"; | |
1168 if (class_cast_needed(passed_recv_type, m->method_holder())) { | |
1169 Klass* formal = Klass::cast(m->method_holder()); | |
1170 return SharedRuntime::generate_class_cast_message("receiver type", | |
1171 formal->external_name()); | |
1172 } | |
1173 return NULL; // checks passed | |
1174 } | |
1175 | |
1176 // Verify that m's signature can be called type-safely by a method handle | |
1177 // of the given method type 'mtype'. | |
1178 // It takes a TRAPS argument because it must perform symbol lookups. | |
1179 void MethodHandles::verify_method_signature(methodHandle m, | |
1180 Handle mtype, | |
1181 int first_ptype_pos, | |
1182 KlassHandle insert_ptype, | |
1183 TRAPS) { | |
1184 Handle mhi_type; | |
1185 if (m->is_method_handle_invoke()) { | |
1186 // use this more exact typing instead of the symbolic signature: | |
1187 mhi_type = Handle(THREAD, m->method_handle_type()); | |
1188 } | |
1189 objArrayHandle ptypes(THREAD, java_lang_invoke_MethodType::ptypes(mtype())); | |
1190 int pnum = first_ptype_pos; | |
1191 int pmax = ptypes->length(); | |
1192 int anum = 0; // method argument | |
1193 const char* err = NULL; | |
1194 ResourceMark rm(THREAD); | |
1195 for (SignatureStream ss(m->signature()); !ss.is_done(); ss.next()) { | |
1196 oop ptype_oop = NULL; | |
1197 if (ss.at_return_type()) { | |
1198 if (pnum != pmax) | |
1199 { err = "too many arguments"; break; } | |
1200 ptype_oop = java_lang_invoke_MethodType::rtype(mtype()); | |
1201 } else { | |
1202 if (pnum >= pmax) | |
1203 { err = "not enough arguments"; break; } | |
1204 if (pnum >= 0) | |
1205 ptype_oop = ptypes->obj_at(pnum); | |
1206 else if (insert_ptype.is_null()) | |
1207 ptype_oop = NULL; | |
1208 else | |
1209 ptype_oop = insert_ptype->java_mirror(); | |
1210 pnum += 1; | |
1211 anum += 1; | |
1212 } | |
1213 KlassHandle pklass; | |
1214 BasicType ptype = T_OBJECT; | |
1215 bool have_ptype = false; | |
1216 // missing ptype_oop does not match any non-reference; use Object to report the error | |
1217 pklass = SystemDictionaryHandles::Object_klass(); | |
1218 if (ptype_oop != NULL) { | |
1219 have_ptype = true; | |
1220 klassOop pklass_oop = NULL; | |
1221 ptype = java_lang_Class::as_BasicType(ptype_oop, &pklass_oop); | |
1222 pklass = KlassHandle(THREAD, pklass_oop); | |
1223 } | |
1224 ptype_oop = NULL; //done with this | |
1225 KlassHandle aklass; | |
1226 BasicType atype = ss.type(); | |
1227 if (atype == T_ARRAY) atype = T_OBJECT; // fold all refs to T_OBJECT | |
1228 if (atype == T_OBJECT) { | |
1229 if (!have_ptype) { | |
1230 // null matches any reference | |
1231 continue; | |
1232 } | |
1233 if (mhi_type.is_null()) { | |
1234 // If we fail to resolve types at this point, we will usually throw an error. | |
1235 TempNewSymbol name = ss.as_symbol_or_null(); | |
1236 if (name != NULL) { | |
1237 instanceKlass* mk = instanceKlass::cast(m->method_holder()); | |
1238 Handle loader(THREAD, mk->class_loader()); | |
1239 Handle domain(THREAD, mk->protection_domain()); | |
1240 klassOop aklass_oop = SystemDictionary::resolve_or_null(name, loader, domain, CHECK); | |
1241 if (aklass_oop != NULL) | |
1242 aklass = KlassHandle(THREAD, aklass_oop); | |
1243 if (aklass.is_null() && | |
1244 pklass.not_null() && | |
1245 loader.is_null() && | |
1246 pklass->name() == name) | |
1247 // accept name equivalence here, since that's the best we can do | |
1248 aklass = pklass; | |
1249 } | |
1250 } else { | |
1251 // for method handle invokers we don't look at the name in the signature | |
1252 oop atype_oop; | |
1253 if (ss.at_return_type()) | |
1254 atype_oop = java_lang_invoke_MethodType::rtype(mhi_type()); | |
1255 else | |
1256 atype_oop = java_lang_invoke_MethodType::ptype(mhi_type(), anum-1); | |
1257 klassOop aklass_oop = NULL; | |
1258 atype = java_lang_Class::as_BasicType(atype_oop, &aklass_oop); | |
1259 aklass = KlassHandle(THREAD, aklass_oop); | |
1260 } | |
1261 } | |
1262 if (!ss.at_return_type()) { | |
1263 err = check_argument_type_change(ptype, pklass(), atype, aklass(), anum); | |
1264 } else { | |
1265 err = check_return_type_change(atype, aklass(), ptype, pklass()); // note reversal! | |
1266 } | |
1267 if (err != NULL) break; | |
1268 } | |
1269 | |
1270 if (err != NULL) { | |
1271 #ifndef PRODUCT | |
1272 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1273 tty->print("*** verify_method_signature failed: "); | |
1274 java_lang_invoke_MethodType::print_signature(mtype(), tty); | |
1275 tty->cr(); | |
1276 tty->print_cr(" first_ptype_pos = %d, insert_ptype = "UINTX_FORMAT, first_ptype_pos, insert_ptype()); | |
1277 tty->print(" Failing method: "); | |
1278 m->print(); | |
1279 } | |
1280 #endif //PRODUCT | |
1281 THROW_MSG(vmSymbols::java_lang_InternalError(), err); | |
1282 } | |
1283 } | |
1284 | |
1285 // Main routine for verifying the MethodHandle.type of a proposed | |
1286 // direct or bound-direct method handle. | |
1287 void MethodHandles::verify_method_type(methodHandle m, | |
1288 Handle mtype, | |
1289 bool has_bound_recv, | |
1290 KlassHandle bound_recv_type, | |
1291 TRAPS) { | |
1292 bool m_needs_receiver = !m->is_static(); | |
1293 | |
1294 const char* err = NULL; | |
1295 | |
1296 int first_ptype_pos = m_needs_receiver ? 1 : 0; | |
1297 if (has_bound_recv) { | |
1298 first_ptype_pos -= 1; // ptypes do not include the bound argument; start earlier in them | |
1299 if (m_needs_receiver && bound_recv_type.is_null()) | |
1300 { err = "bound receiver is not an object"; goto die; } | |
1301 } | |
1302 | |
1303 if (m_needs_receiver && err == NULL) { | |
1304 objArrayOop ptypes = java_lang_invoke_MethodType::ptypes(mtype()); | |
1305 if (ptypes->length() < first_ptype_pos) | |
1306 { err = "receiver argument is missing"; goto die; } | |
1307 if (has_bound_recv) | |
1308 err = check_method_receiver(m(), bound_recv_type->as_klassOop()); | |
1309 else | |
1310 err = check_method_receiver(m(), java_lang_Class::as_klassOop(ptypes->obj_at(first_ptype_pos-1))); | |
1311 if (err != NULL) goto die; | |
1312 } | |
1313 | |
1314 // Check the other arguments for mistypes. | |
1315 verify_method_signature(m, mtype, first_ptype_pos, bound_recv_type, CHECK); | |
1316 return; | |
1317 | |
1318 die: | |
1319 THROW_MSG(vmSymbols::java_lang_InternalError(), err); | |
1320 } | |
1321 | |
1322 void MethodHandles::verify_vmslots(Handle mh, TRAPS) { | |
1323 // Verify vmslots. | |
1324 int check_slots = argument_slot_count(java_lang_invoke_MethodHandle::type(mh())); | |
1325 if (java_lang_invoke_MethodHandle::vmslots(mh()) != check_slots) { | |
1326 THROW_MSG(vmSymbols::java_lang_InternalError(), "bad vmslots in BMH"); | |
1327 } | |
1328 } | |
1329 | |
1330 void MethodHandles::verify_vmargslot(Handle mh, int argnum, int argslot, TRAPS) { | |
1331 // Verify that argslot points at the given argnum. | |
1332 int check_slot = argument_slot(java_lang_invoke_MethodHandle::type(mh()), argnum); | |
1333 if (argslot != check_slot || argslot < 0) { | |
1334 ResourceMark rm; | |
1335 const char* fmt = "for argnum of %d, vmargslot is %d, should be %d"; | |
1336 size_t msglen = strlen(fmt) + 3*11 + 1; | |
1337 char* msg = NEW_RESOURCE_ARRAY(char, msglen); | |
1338 jio_snprintf(msg, msglen, fmt, argnum, argslot, check_slot); | |
1339 THROW_MSG(vmSymbols::java_lang_InternalError(), msg); | |
1340 } | |
1341 } | |
1342 | |
1343 // Verify the correspondence between two method types. | |
1344 // Apart from the advertised changes, caller method type X must | |
1345 // be able to invoke the callee method Y type with no violations | |
1346 // of type integrity. | |
1347 // Return NULL if all is well, else a short error message. | |
1348 const char* MethodHandles::check_method_type_change(oop src_mtype, int src_beg, int src_end, | |
1349 int insert_argnum, oop insert_type, | |
1350 int change_argnum, oop change_type, | |
1351 int delete_argnum, | |
1352 oop dst_mtype, int dst_beg, int dst_end, | |
1353 bool raw) { | |
1354 objArrayOop src_ptypes = java_lang_invoke_MethodType::ptypes(src_mtype); | |
1355 objArrayOop dst_ptypes = java_lang_invoke_MethodType::ptypes(dst_mtype); | |
1356 | |
1357 int src_max = src_ptypes->length(); | |
1358 int dst_max = dst_ptypes->length(); | |
1359 | |
1360 if (src_end == -1) src_end = src_max; | |
1361 if (dst_end == -1) dst_end = dst_max; | |
1362 | |
1363 assert(0 <= src_beg && src_beg <= src_end && src_end <= src_max, "oob"); | |
1364 assert(0 <= dst_beg && dst_beg <= dst_end && dst_end <= dst_max, "oob"); | |
1365 | |
1366 // pending actions; set to -1 when done: | |
1367 int ins_idx = insert_argnum, chg_idx = change_argnum, del_idx = delete_argnum; | |
1368 | |
1369 const char* err = NULL; | |
1370 | |
1371 // Walk along each array of parameter types, including a virtual | |
1372 // NULL end marker at the end of each. | |
1373 for (int src_idx = src_beg, dst_idx = dst_beg; | |
1374 (src_idx <= src_end && dst_idx <= dst_end); | |
1375 src_idx++, dst_idx++) { | |
1376 oop src_type = (src_idx == src_end) ? oop(NULL) : src_ptypes->obj_at(src_idx); | |
1377 oop dst_type = (dst_idx == dst_end) ? oop(NULL) : dst_ptypes->obj_at(dst_idx); | |
1378 bool fix_null_src_type = false; | |
1379 | |
1380 // Perform requested edits. | |
1381 if (ins_idx == src_idx) { | |
1382 // note that the inserted guy is never affected by a change or deletion | |
1383 ins_idx = -1; | |
1384 src_type = insert_type; | |
1385 fix_null_src_type = true; | |
1386 --src_idx; // back up to process src type on next loop | |
1387 src_idx = src_end; | |
1388 } else { | |
1389 // note that the changed guy can be immediately deleted | |
1390 if (chg_idx == src_idx) { | |
1391 chg_idx = -1; | |
1392 assert(src_idx < src_end, "oob"); | |
1393 src_type = change_type; | |
1394 fix_null_src_type = true; | |
1395 } | |
1396 if (del_idx == src_idx) { | |
1397 del_idx = -1; | |
1398 assert(src_idx < src_end, "oob"); | |
1399 --dst_idx; | |
1400 continue; // rerun loop after skipping this position | |
1401 } | |
1402 } | |
1403 | |
1404 if (src_type == NULL && fix_null_src_type) | |
1405 // explicit null in this case matches any dest reference | |
1406 src_type = (java_lang_Class::is_primitive(dst_type) ? object_java_mirror() : dst_type); | |
1407 | |
1408 // Compare the two argument types. | |
1409 if (src_type != dst_type) { | |
1410 if (src_type == NULL) return "not enough arguments"; | |
1411 if (dst_type == NULL) return "too many arguments"; | |
1412 err = check_argument_type_change(src_type, dst_type, dst_idx, raw); | |
1413 if (err != NULL) return err; | |
1414 } | |
1415 } | |
1416 | |
1417 // Now compare return types also. | |
1418 oop src_rtype = java_lang_invoke_MethodType::rtype(src_mtype); | |
1419 oop dst_rtype = java_lang_invoke_MethodType::rtype(dst_mtype); | |
1420 if (src_rtype != dst_rtype) { | |
1421 err = check_return_type_change(dst_rtype, src_rtype, raw); // note reversal! | |
1422 if (err != NULL) return err; | |
1423 } | |
1424 | |
1425 assert(err == NULL, ""); | |
1426 return NULL; // all is well | |
1427 } | |
1428 | |
1429 | |
1430 const char* MethodHandles::check_argument_type_change(BasicType src_type, | |
1431 klassOop src_klass, | |
1432 BasicType dst_type, | |
1433 klassOop dst_klass, | |
1434 int argnum, | |
1435 bool raw) { | |
1436 const char* err = NULL; | |
1437 const bool for_return = (argnum < 0); | |
1438 | |
1439 // just in case: | |
1440 if (src_type == T_ARRAY) src_type = T_OBJECT; | |
1441 if (dst_type == T_ARRAY) dst_type = T_OBJECT; | |
1442 | |
1443 // Produce some nice messages if VerifyMethodHandles is turned on: | |
1444 if (!same_basic_type_for_arguments(src_type, dst_type, raw, for_return)) { | |
1445 if (src_type == T_OBJECT) { | |
1446 if (raw && is_java_primitive(dst_type)) | |
1447 return NULL; // ref-to-prim discards ref and returns zero | |
1448 err = (!for_return | |
1449 ? "type mismatch: passing a %s for method argument #%d, which expects primitive %s" | |
1450 : "type mismatch: returning a %s, but caller expects primitive %s"); | |
1451 } else if (dst_type == T_OBJECT) { | |
1452 err = (!for_return | |
1453 ? "type mismatch: passing a primitive %s for method argument #%d, which expects %s" | |
1454 : "type mismatch: returning a primitive %s, but caller expects %s"); | |
1455 } else { | |
1456 err = (!for_return | |
1457 ? "type mismatch: passing a %s for method argument #%d, which expects %s" | |
1458 : "type mismatch: returning a %s, but caller expects %s"); | |
1459 } | |
1460 } else if (src_type == T_OBJECT && dst_type == T_OBJECT && | |
1461 class_cast_needed(src_klass, dst_klass)) { | |
1462 if (!class_cast_needed(dst_klass, src_klass)) { | |
1463 if (raw) | |
1464 return NULL; // reverse cast is OK; the MH target is trusted to enforce it | |
1465 err = (!for_return | |
1466 ? "cast required: passing a %s for method argument #%d, which expects %s" | |
1467 : "cast required: returning a %s, but caller expects %s"); | |
1468 } else { | |
1469 err = (!for_return | |
1470 ? "reference mismatch: passing a %s for method argument #%d, which expects %s" | |
1471 : "reference mismatch: returning a %s, but caller expects %s"); | |
1472 } | |
1473 } else { | |
1474 // passed the obstacle course | |
1475 return NULL; | |
1476 } | |
1477 | |
1478 // format, format, format | |
1479 const char* src_name = type2name(src_type); | |
1480 const char* dst_name = type2name(dst_type); | |
1481 if (src_name == NULL) src_name = "unknown type"; | |
1482 if (dst_name == NULL) dst_name = "unknown type"; | |
1483 if (src_type == T_OBJECT) | |
1484 src_name = (src_klass != NULL) ? Klass::cast(src_klass)->external_name() : "an unresolved class"; | |
1485 if (dst_type == T_OBJECT) | |
1486 dst_name = (dst_klass != NULL) ? Klass::cast(dst_klass)->external_name() : "an unresolved class"; | |
1487 | |
1488 size_t msglen = strlen(err) + strlen(src_name) + strlen(dst_name) + (argnum < 10 ? 1 : 11); | |
1489 char* msg = NEW_RESOURCE_ARRAY(char, msglen + 1); | |
1490 if (!for_return) { | |
1491 assert(strstr(err, "%d") != NULL, ""); | |
1492 jio_snprintf(msg, msglen, err, src_name, argnum, dst_name); | |
1493 } else { | |
1494 assert(strstr(err, "%d") == NULL, ""); | |
1495 jio_snprintf(msg, msglen, err, src_name, dst_name); | |
1496 } | |
1497 return msg; | |
1498 } | |
1499 | |
1500 // Compute the depth within the stack of the given argument, i.e., | |
1501 // the combined size of arguments to the right of the given argument. | |
1502 // For the last argument (ptypes.length-1) this will be zero. | |
1503 // For the first argument (0) this will be the size of all | |
1504 // arguments but that one. For the special number -1, this | |
1505 // will be the size of all arguments, including the first. | |
1506 // If the argument is neither -1 nor a valid argument index, | |
1507 // then return a negative number. Otherwise, the result | |
1508 // is in the range [0..vmslots] inclusive. | |
1509 int MethodHandles::argument_slot(oop method_type, int arg) { | |
1510 objArrayOop ptypes = java_lang_invoke_MethodType::ptypes(method_type); | |
1511 int argslot = 0; | |
1512 int len = ptypes->length(); | |
1513 if (arg < -1 || arg >= len) return -99; | |
1514 for (int i = len-1; i > arg; i--) { | |
1515 BasicType bt = java_lang_Class::as_BasicType(ptypes->obj_at(i)); | |
1516 argslot += type2size[bt]; | |
1517 } | |
1518 assert(argument_slot_to_argnum(method_type, argslot) == arg, "inverse works"); | |
1519 return argslot; | |
1520 } | |
1521 | |
1522 // Given a slot number, return the argument number. | |
1523 int MethodHandles::argument_slot_to_argnum(oop method_type, int query_argslot) { | |
1524 objArrayOop ptypes = java_lang_invoke_MethodType::ptypes(method_type); | |
1525 int argslot = 0; | |
1526 int len = ptypes->length(); | |
1527 for (int i = len-1; i >= 0; i--) { | |
1528 if (query_argslot == argslot) return i; | |
1529 BasicType bt = java_lang_Class::as_BasicType(ptypes->obj_at(i)); | |
1530 argslot += type2size[bt]; | |
1531 } | |
1532 // return pseudo-arg deepest in stack: | |
1533 if (query_argslot == argslot) return -1; | |
1534 return -99; // oob slot, or splitting a double-slot arg | |
1535 } | |
1536 | |
1537 methodHandle MethodHandles::dispatch_decoded_method(methodHandle m, | |
1538 KlassHandle receiver_limit, | |
1539 int decode_flags, | |
1540 KlassHandle receiver_klass, | |
1541 TRAPS) { | |
1542 assert((decode_flags & ~_DMF_DIRECT_MASK) == 0, "must be direct method reference"); | |
1543 assert((decode_flags & _dmf_has_receiver) != 0, "must have a receiver or first reference argument"); | |
1544 | |
1545 if (!m->is_static() && | |
1546 (receiver_klass.is_null() || !receiver_klass->is_subtype_of(m->method_holder()))) | |
1547 // given type does not match class of method, or receiver is null! | |
1548 // caller should have checked this, but let's be extra careful... | |
1549 return methodHandle(); | |
1550 | |
1551 if (receiver_limit.not_null() && | |
1552 (receiver_klass.not_null() && !receiver_klass->is_subtype_of(receiver_limit()))) | |
1553 // given type is not limited to the receiver type | |
1554 // note that a null receiver can match any reference value, for a static method | |
1555 return methodHandle(); | |
1556 | |
1557 if (!(decode_flags & MethodHandles::_dmf_does_dispatch)) { | |
1558 // pre-dispatched or static method (null receiver is OK for static) | |
1559 return m; | |
1560 | |
1561 } else if (receiver_klass.is_null()) { | |
1562 // null receiver value; cannot dispatch | |
1563 return methodHandle(); | |
1564 | |
1565 } else if (!(decode_flags & MethodHandles::_dmf_from_interface)) { | |
1566 // perform virtual dispatch | |
1567 int vtable_index = m->vtable_index(); | |
1568 guarantee(vtable_index >= 0, "valid vtable index"); | |
1569 | |
1570 // receiver_klass might be an arrayKlassOop but all vtables start at | |
1571 // the same place. The cast is to avoid virtual call and assertion. | |
1572 // See also LinkResolver::runtime_resolve_virtual_method. | |
1573 instanceKlass* inst = (instanceKlass*)Klass::cast(receiver_klass()); | |
1574 DEBUG_ONLY(inst->verify_vtable_index(vtable_index)); | |
1575 methodOop m_oop = inst->method_at_vtable(vtable_index); | |
1576 return methodHandle(THREAD, m_oop); | |
1577 | |
1578 } else { | |
1579 // perform interface dispatch | |
1580 int itable_index = klassItable::compute_itable_index(m()); | |
1581 guarantee(itable_index >= 0, "valid itable index"); | |
1582 instanceKlass* inst = instanceKlass::cast(receiver_klass()); | |
1583 methodOop m_oop = inst->method_at_itable(m->method_holder(), itable_index, THREAD); | |
1584 return methodHandle(THREAD, m_oop); | |
1585 } | |
1586 } | |
1587 | |
1588 void MethodHandles::verify_DirectMethodHandle(Handle mh, methodHandle m, TRAPS) { | |
1589 // Verify type. | |
1590 Handle mtype(THREAD, java_lang_invoke_MethodHandle::type(mh())); | |
1591 verify_method_type(m, mtype, false, KlassHandle(), CHECK); | |
1592 | |
1593 // Verify vmslots. | |
1594 if (java_lang_invoke_MethodHandle::vmslots(mh()) != m->size_of_parameters()) { | |
1595 THROW_MSG(vmSymbols::java_lang_InternalError(), "bad vmslots in DMH"); | |
1596 } | |
1597 } | |
1598 | |
1599 void MethodHandles::init_DirectMethodHandle(Handle mh, methodHandle m, bool do_dispatch, TRAPS) { | |
1600 // Check arguments. | |
1601 if (mh.is_null() || m.is_null() || | |
1602 (!do_dispatch && m->is_abstract())) { | |
1603 THROW(vmSymbols::java_lang_InternalError()); | |
1604 } | |
1605 | |
1606 if (VerifyMethodHandles) { | |
1607 // The privileged code which invokes this routine should not make | |
1608 // a mistake about types, but it's better to verify. | |
1609 verify_DirectMethodHandle(mh, m, CHECK); | |
1610 } | |
1611 | |
1612 // Finally, after safety checks are done, link to the target method. | |
1613 // We will follow the same path as the latter part of | |
1614 // InterpreterRuntime::resolve_invoke(), which first finds the method | |
1615 // and then decides how to populate the constant pool cache entry | |
1616 // that links the interpreter calls to the method. We need the same | |
1617 // bits, and will use the same calling sequence code. | |
1618 | |
1619 int vmindex = methodOopDesc::garbage_vtable_index; | |
1620 Handle vmtarget; | |
1621 | |
1622 instanceKlass::cast(m->method_holder())->link_class(CHECK); | |
1623 | |
1624 MethodHandleEntry* me = NULL; | |
1625 if (do_dispatch && Klass::cast(m->method_holder())->is_interface()) { | |
1626 // We are simulating an invokeinterface instruction. | |
1627 // (We might also be simulating an invokevirtual on a miranda method, | |
1628 // but it is safe to treat it as an invokeinterface.) | |
1629 assert(!m->can_be_statically_bound(), "no final methods on interfaces"); | |
1630 vmindex = klassItable::compute_itable_index(m()); | |
1631 assert(vmindex >= 0, "(>=0) == do_dispatch"); | |
1632 // Set up same bits as ConstantPoolCacheEntry::set_interface_call(). | |
1633 vmtarget = m->method_holder(); // the interface | |
1634 me = MethodHandles::entry(MethodHandles::_invokeinterface_mh); | |
1635 } else if (!do_dispatch || m->can_be_statically_bound()) { | |
1636 // We are simulating an invokestatic or invokespecial instruction. | |
1637 // Set up the method pointer, just like ConstantPoolCacheEntry::set_method(). | |
1638 vmtarget = m; | |
1639 // this does not help dispatch, but it will make it possible to parse this MH: | |
1640 vmindex = methodOopDesc::nonvirtual_vtable_index; | |
1641 assert(vmindex < 0, "(>=0) == do_dispatch"); | |
1642 if (!m->is_static()) { | |
1643 me = MethodHandles::entry(MethodHandles::_invokespecial_mh); | |
1644 } else { | |
1645 me = MethodHandles::entry(MethodHandles::_invokestatic_mh); | |
1646 // Part of the semantics of a static call is an initialization barrier. | |
1647 // For a DMH, it is done now, when the handle is created. | |
1648 Klass* k = Klass::cast(m->method_holder()); | |
1649 if (k->should_be_initialized()) { | |
1650 k->initialize(CHECK); // possible safepoint | |
1651 } | |
1652 } | |
1653 } else { | |
1654 // We are simulating an invokevirtual instruction. | |
1655 // Set up the vtable index, just like ConstantPoolCacheEntry::set_method(). | |
1656 // The key logic is LinkResolver::runtime_resolve_virtual_method. | |
1657 vmindex = m->vtable_index(); | |
1658 vmtarget = m->method_holder(); | |
1659 me = MethodHandles::entry(MethodHandles::_invokevirtual_mh); | |
1660 } | |
1661 | |
1662 if (me == NULL) { THROW(vmSymbols::java_lang_InternalError()); } | |
1663 | |
1664 java_lang_invoke_DirectMethodHandle::set_vmtarget(mh(), vmtarget()); | |
1665 java_lang_invoke_DirectMethodHandle::set_vmindex( mh(), vmindex); | |
1666 DEBUG_ONLY(KlassHandle rlimit; int flags); | |
1667 assert(MethodHandles::decode_method(mh(), rlimit, flags) == m, | |
1668 "properly stored for later decoding"); | |
1669 DEBUG_ONLY(bool actual_do_dispatch = ((flags & _dmf_does_dispatch) != 0)); | |
1670 assert(!(actual_do_dispatch && !do_dispatch), | |
1671 "do not perform dispatch if !do_dispatch specified"); | |
1672 assert(actual_do_dispatch == (vmindex >= 0), "proper later decoding of do_dispatch"); | |
1673 assert(decode_MethodHandle_stack_pushes(mh()) == 0, "DMH does not move stack"); | |
1674 | |
1675 // Done! | |
1676 java_lang_invoke_MethodHandle::set_vmentry(mh(), me); | |
1677 } | |
1678 | |
1679 void MethodHandles::verify_BoundMethodHandle_with_receiver(Handle mh, | |
1680 methodHandle m, | |
1681 TRAPS) { | |
1682 // Verify type. | |
1683 KlassHandle bound_recv_type; | |
1684 { | |
1685 oop receiver = java_lang_invoke_BoundMethodHandle::argument(mh()); | |
1686 if (receiver != NULL) | |
1687 bound_recv_type = KlassHandle(THREAD, receiver->klass()); | |
1688 } | |
1689 Handle mtype(THREAD, java_lang_invoke_MethodHandle::type(mh())); | |
1690 verify_method_type(m, mtype, true, bound_recv_type, CHECK); | |
1691 | |
1692 int receiver_pos = m->size_of_parameters() - 1; | |
1693 | |
1694 // Verify MH.vmargslot, which should point at the bound receiver. | |
1695 verify_vmargslot(mh, -1, java_lang_invoke_BoundMethodHandle::vmargslot(mh()), CHECK); | |
1696 //verify_vmslots(mh, CHECK); | |
1697 | |
1698 // Verify vmslots. | |
1699 if (java_lang_invoke_MethodHandle::vmslots(mh()) != receiver_pos) { | |
1700 THROW_MSG(vmSymbols::java_lang_InternalError(), "bad vmslots in BMH (receiver)"); | |
1701 } | |
1702 } | |
1703 | |
1704 // Initialize a BMH with a receiver bound directly to a methodOop. | |
1705 void MethodHandles::init_BoundMethodHandle_with_receiver(Handle mh, | |
1706 methodHandle original_m, | |
1707 KlassHandle receiver_limit, | |
1708 int decode_flags, | |
1709 TRAPS) { | |
1710 // Check arguments. | |
1711 if (mh.is_null() || original_m.is_null()) { | |
1712 THROW(vmSymbols::java_lang_InternalError()); | |
1713 } | |
1714 | |
1715 KlassHandle receiver_klass; | |
1716 { | |
1717 oop receiver_oop = java_lang_invoke_BoundMethodHandle::argument(mh()); | |
1718 if (receiver_oop != NULL) | |
1719 receiver_klass = KlassHandle(THREAD, receiver_oop->klass()); | |
1720 } | |
1721 methodHandle m = dispatch_decoded_method(original_m, | |
1722 receiver_limit, decode_flags, | |
1723 receiver_klass, | |
1724 CHECK); | |
1725 if (m.is_null()) { THROW(vmSymbols::java_lang_InternalError()); } | |
1726 if (m->is_abstract()) { THROW(vmSymbols::java_lang_AbstractMethodError()); } | |
1727 | |
1728 int vmargslot = m->size_of_parameters() - 1; | |
1729 assert(java_lang_invoke_BoundMethodHandle::vmargslot(mh()) == vmargslot, ""); | |
1730 | |
1731 if (VerifyMethodHandles) { | |
1732 verify_BoundMethodHandle_with_receiver(mh, m, CHECK); | |
1733 } | |
1734 | |
1735 java_lang_invoke_BoundMethodHandle::set_vmtarget(mh(), m()); | |
1736 | |
1737 DEBUG_ONLY(KlassHandle junk1; int junk2); | |
1738 assert(MethodHandles::decode_method(mh(), junk1, junk2) == m, "properly stored for later decoding"); | |
1739 assert(decode_MethodHandle_stack_pushes(mh()) == 1, "BMH pushes one stack slot"); | |
1740 | |
1741 // Done! | |
1742 java_lang_invoke_MethodHandle::set_vmentry(mh(), MethodHandles::entry(MethodHandles::_bound_ref_direct_mh)); | |
1743 } | |
1744 | |
1745 void MethodHandles::verify_BoundMethodHandle(Handle mh, Handle target, int argnum, | |
1746 bool direct_to_method, TRAPS) { | |
1747 ResourceMark rm; | |
1748 Handle ptype_handle(THREAD, | |
1749 java_lang_invoke_MethodType::ptype(java_lang_invoke_MethodHandle::type(target()), argnum)); | |
1750 KlassHandle ptype_klass; | |
1751 BasicType ptype = java_lang_Class::as_BasicType(ptype_handle(), &ptype_klass); | |
1752 int slots_pushed = type2size[ptype]; | |
1753 | |
1754 oop argument = java_lang_invoke_BoundMethodHandle::argument(mh()); | |
1755 | |
1756 const char* err = NULL; | |
1757 | |
1758 switch (ptype) { | |
1759 case T_OBJECT: | |
1760 if (argument != NULL) | |
1761 // we must implicitly convert from the arg type to the outgoing ptype | |
1762 err = check_argument_type_change(T_OBJECT, argument->klass(), ptype, ptype_klass(), argnum); | |
1763 break; | |
1764 | |
1765 case T_ARRAY: case T_VOID: | |
1766 assert(false, "array, void do not appear here"); | |
1767 default: | |
1768 if (ptype != T_INT && !is_subword_type(ptype)) { | |
1769 err = "unexpected parameter type"; | |
1770 break; | |
1771 } | |
1772 // check subrange of Integer.value, if necessary | |
1773 if (argument == NULL || argument->klass() != SystemDictionary::Integer_klass()) { | |
1774 err = "bound integer argument must be of type java.lang.Integer"; | |
1775 break; | |
1776 } | |
1777 if (ptype != T_INT) { | |
1778 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT); | |
1779 jint value = argument->int_field(value_offset); | |
1780 int vminfo = adapter_unbox_subword_vminfo(ptype); | |
1781 jint subword = truncate_subword_from_vminfo(value, vminfo); | |
1782 if (value != subword) { | |
1783 err = "bound subword value does not fit into the subword type"; | |
1784 break; | |
1785 } | |
1786 } | |
1787 break; | |
1788 case T_FLOAT: | |
1789 case T_DOUBLE: | |
1790 case T_LONG: | |
1791 { | |
1792 // we must implicitly convert from the unboxed arg type to the outgoing ptype | |
1793 BasicType argbox = java_lang_boxing_object::basic_type(argument); | |
1794 if (argbox != ptype) { | |
1795 err = check_argument_type_change(T_OBJECT, (argument == NULL | |
1796 ? SystemDictionary::Object_klass() | |
1797 : argument->klass()), | |
1798 ptype, ptype_klass(), argnum); | |
1799 assert(err != NULL, "this must be an error"); | |
1800 } | |
1801 break; | |
1802 } | |
1803 } | |
1804 | |
1805 if (err == NULL) { | |
1806 DEBUG_ONLY(int this_pushes = decode_MethodHandle_stack_pushes(mh())); | |
1807 if (direct_to_method) { | |
1808 assert(this_pushes == slots_pushed, "BMH pushes one or two stack slots"); | |
1809 } else { | |
1810 int target_pushes = decode_MethodHandle_stack_pushes(target()); | |
1811 assert(this_pushes == slots_pushed + target_pushes, "BMH stack motion must be correct"); | |
1812 } | |
1813 } | |
1814 | |
1815 if (err == NULL) { | |
1816 // Verify the rest of the method type. | |
1817 err = check_method_type_insertion(java_lang_invoke_MethodHandle::type(mh()), | |
1818 argnum, ptype_handle(), | |
1819 java_lang_invoke_MethodHandle::type(target())); | |
1820 } | |
1821 | |
1822 if (err != NULL) { | |
1823 THROW_MSG(vmSymbols::java_lang_InternalError(), err); | |
1824 } | |
1825 } | |
1826 | |
1827 void MethodHandles::init_BoundMethodHandle(Handle mh, Handle target, int argnum, TRAPS) { | |
1828 // Check arguments. | |
1829 if (mh.is_null() || target.is_null() || !java_lang_invoke_MethodHandle::is_instance(target())) { | |
1830 THROW(vmSymbols::java_lang_InternalError()); | |
1831 } | |
1832 | |
1833 int argslot = java_lang_invoke_BoundMethodHandle::vmargslot(mh()); | |
1834 | |
1835 if (VerifyMethodHandles) { | |
1836 int insert_after = argnum - 1; | |
1837 verify_vmargslot(mh, insert_after, argslot, CHECK); | |
1838 verify_vmslots(mh, CHECK); | |
1839 } | |
1840 | |
1841 // Get bound type and required slots. | |
1842 BasicType ptype; | |
1843 { | |
1844 oop ptype_oop = java_lang_invoke_MethodType::ptype(java_lang_invoke_MethodHandle::type(target()), argnum); | |
1845 ptype = java_lang_Class::as_BasicType(ptype_oop); | |
1846 } | |
1847 int slots_pushed = type2size[ptype]; | |
1848 | |
1849 // If (a) the target is a direct non-dispatched method handle, | |
1850 // or (b) the target is a dispatched direct method handle and we | |
1851 // are binding the receiver, cut out the middle-man. | |
1852 // Do this by decoding the DMH and using its methodOop directly as vmtarget. | |
1853 bool direct_to_method = false; | |
1854 if (OptimizeMethodHandles && | |
1855 target->klass() == SystemDictionary::DirectMethodHandle_klass() && | |
1856 (argnum != 0 || java_lang_invoke_BoundMethodHandle::argument(mh()) != NULL) && | |
1857 (argnum == 0 || java_lang_invoke_DirectMethodHandle::vmindex(target()) < 0)) { | |
1858 KlassHandle receiver_limit; int decode_flags = 0; | |
1859 methodHandle m = decode_method(target(), receiver_limit, decode_flags); | |
1860 if (m.is_null()) { THROW_MSG(vmSymbols::java_lang_InternalError(), "DMH failed to decode"); } | |
1861 DEBUG_ONLY(int m_vmslots = m->size_of_parameters() - slots_pushed); // pos. of 1st arg. | |
1862 assert(java_lang_invoke_BoundMethodHandle::vmslots(mh()) == m_vmslots, "type w/ m sig"); | |
1863 if (argnum == 0 && (decode_flags & _dmf_has_receiver) != 0) { | |
1864 init_BoundMethodHandle_with_receiver(mh, m, | |
1865 receiver_limit, decode_flags, | |
1866 CHECK); | |
1867 return; | |
1868 } | |
1869 | |
1870 // Even if it is not a bound receiver, we still might be able | |
1871 // to bind another argument and still invoke the methodOop directly. | |
1872 if (!(decode_flags & _dmf_does_dispatch)) { | |
1873 direct_to_method = true; | |
1874 java_lang_invoke_BoundMethodHandle::set_vmtarget(mh(), m()); | |
1875 } | |
1876 } | |
1877 if (!direct_to_method) | |
1878 java_lang_invoke_BoundMethodHandle::set_vmtarget(mh(), target()); | |
1879 | |
1880 if (VerifyMethodHandles) { | |
1881 verify_BoundMethodHandle(mh, target, argnum, direct_to_method, CHECK); | |
1882 } | |
1883 | |
1884 // Next question: Is this a ref, int, or long bound value? | |
1885 MethodHandleEntry* me = NULL; | |
1886 if (ptype == T_OBJECT) { | |
1887 if (direct_to_method) me = MethodHandles::entry(_bound_ref_direct_mh); | |
1888 else me = MethodHandles::entry(_bound_ref_mh); | |
1889 } else if (slots_pushed == 2) { | |
1890 if (direct_to_method) me = MethodHandles::entry(_bound_long_direct_mh); | |
1891 else me = MethodHandles::entry(_bound_long_mh); | |
1892 } else if (slots_pushed == 1) { | |
1893 if (direct_to_method) me = MethodHandles::entry(_bound_int_direct_mh); | |
1894 else me = MethodHandles::entry(_bound_int_mh); | |
1895 } else { | |
1896 assert(false, ""); | |
1897 } | |
1898 | |
1899 // Done! | |
1900 java_lang_invoke_MethodHandle::set_vmentry(mh(), me); | |
1901 } | |
1902 | |
1903 static void throw_InternalError_for_bad_conversion(int conversion, const char* err, TRAPS) { | |
1904 char msg[200]; | |
1905 jio_snprintf(msg, sizeof(msg), "bad adapter (conversion=0x%08x): %s", conversion, err); | |
1906 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), msg); | |
1907 } | |
1908 | |
1909 void MethodHandles::verify_AdapterMethodHandle(Handle mh, int argnum, TRAPS) { | |
1910 ResourceMark rm; | |
1911 jint conversion = java_lang_invoke_AdapterMethodHandle::conversion(mh()); | |
1912 int argslot = java_lang_invoke_AdapterMethodHandle::vmargslot(mh()); | |
1913 | |
1914 verify_vmargslot(mh, argnum, argslot, CHECK); | |
1915 verify_vmslots(mh, CHECK); | |
1916 | |
1917 jint conv_op = adapter_conversion_op(conversion); | |
1918 if (!conv_op_valid(conv_op)) { | |
1919 throw_InternalError_for_bad_conversion(conversion, "unknown conversion op", THREAD); | |
1920 return; | |
1921 } | |
1922 EntryKind ek = adapter_entry_kind(conv_op); | |
1923 | |
1924 int stack_move = adapter_conversion_stack_move(conversion); | |
1925 BasicType src = adapter_conversion_src_type(conversion); | |
1926 BasicType dest = adapter_conversion_dest_type(conversion); | |
1927 int vminfo = adapter_conversion_vminfo(conversion); // should be zero | |
1928 | |
1929 Handle argument(THREAD, java_lang_invoke_AdapterMethodHandle::argument(mh())); | |
1930 Handle target(THREAD, java_lang_invoke_AdapterMethodHandle::vmtarget(mh())); | |
1931 Handle src_mtype(THREAD, java_lang_invoke_MethodHandle::type(mh())); | |
1932 Handle dst_mtype(THREAD, java_lang_invoke_MethodHandle::type(target())); | |
1933 Handle arg_mtype; | |
1934 | |
1935 const char* err = NULL; | |
1936 | |
1937 if (err == NULL) { | |
1938 // Check that the correct argument is supplied, but only if it is required. | |
1939 switch (ek) { | |
1940 case _adapter_check_cast: // target type of cast | |
1941 case _adapter_ref_to_prim: // wrapper type from which to unbox | |
1942 case _adapter_spread_args: // array type to spread from | |
1943 if (!java_lang_Class::is_instance(argument()) | |
1944 || java_lang_Class::is_primitive(argument())) | |
1945 { err = "adapter requires argument of type java.lang.Class"; break; } | |
1946 if (ek == _adapter_spread_args) { | |
1947 // Make sure it is a suitable collection type. (Array, for now.) | |
1948 Klass* ak = Klass::cast(java_lang_Class::as_klassOop(argument())); | |
1949 if (!ak->oop_is_array()) | |
1950 { err = "spread adapter requires argument representing an array class"; break; } | |
1951 BasicType et = arrayKlass::cast(ak->as_klassOop())->element_type(); | |
1952 if (et != dest && stack_move <= 0) | |
1953 { err = "spread adapter requires array class argument of correct type"; break; } | |
1954 } | |
1955 break; | |
1956 case _adapter_prim_to_ref: // boxer MH to use | |
1957 case _adapter_collect_args: // method handle which collects the args | |
1958 case _adapter_fold_args: // method handle which collects the args | |
1959 if (!java_lang_invoke_MethodHandle::is_instance(argument())) | |
1960 { err = "MethodHandle adapter argument required"; break; } | |
1961 arg_mtype = Handle(THREAD, java_lang_invoke_MethodHandle::type(argument())); | |
1962 break; | |
1963 default: | |
1964 if (argument.not_null()) | |
1965 { err = "adapter has spurious argument"; break; } | |
1966 break; | |
1967 } | |
1968 } | |
1969 | |
1970 if (err == NULL) { | |
1971 // Check that the src/dest types are supplied if needed. | |
1972 // Also check relevant parameter or return types. | |
1973 switch (ek) { | |
1974 case _adapter_check_cast: | |
1975 if (src != T_OBJECT || dest != T_OBJECT) { | |
1976 err = "adapter requires object src/dest conversion subfields"; | |
1977 } | |
1978 break; | |
1979 case _adapter_prim_to_prim: | |
1980 if (!is_java_primitive(src) || !is_java_primitive(dest) || src == dest) { | |
1981 err = "adapter requires primitive src/dest conversion subfields"; break; | |
1982 } | |
1983 if ( (src == T_FLOAT || src == T_DOUBLE) && !(dest == T_FLOAT || dest == T_DOUBLE) || | |
1984 !(src == T_FLOAT || src == T_DOUBLE) && (dest == T_FLOAT || dest == T_DOUBLE)) { | |
1985 err = "adapter cannot convert beween floating and fixed-point"; break; | |
1986 } | |
1987 break; | |
1988 case _adapter_ref_to_prim: | |
1989 if (src != T_OBJECT || !is_java_primitive(dest) | |
1990 || argument() != Klass::cast(SystemDictionary::box_klass(dest))->java_mirror()) { | |
1991 err = "adapter requires primitive dest conversion subfield"; break; | |
1992 } | |
1993 break; | |
1994 case _adapter_prim_to_ref: | |
1995 if (!is_java_primitive(src) || dest != T_OBJECT) { | |
1996 err = "adapter requires primitive src conversion subfield"; break; | |
1997 } | |
1998 break; | |
1999 case _adapter_swap_args: | |
2000 { | |
2001 if (!src || !dest) { | |
2002 err = "adapter requires src/dest conversion subfields for swap"; break; | |
2003 } | |
2004 int src_size = type2size[src]; | |
2005 if (src_size != type2size[dest]) { | |
2006 err = "adapter requires equal sizes for src/dest"; break; | |
2007 } | |
2008 int src_slot = argslot; | |
2009 int dest_slot = vminfo; | |
2010 int src_arg = argnum; | |
2011 int dest_arg = argument_slot_to_argnum(src_mtype(), dest_slot); | |
2012 verify_vmargslot(mh, dest_arg, dest_slot, CHECK); | |
2013 if (!(dest_slot >= src_slot + src_size) && | |
2014 !(src_slot >= dest_slot + src_size)) { | |
2015 err = "source, destination slots must be distinct"; break; | |
2016 } else if (!(src_slot > dest_slot)) { | |
2017 err = "source of swap must be deeper in stack"; break; | |
2018 } | |
2019 err = check_argument_type_change(java_lang_invoke_MethodType::ptype(src_mtype(), dest_arg), | |
2020 java_lang_invoke_MethodType::ptype(dst_mtype(), src_arg), | |
2021 dest_arg); | |
2022 if (err == NULL) | |
2023 err = check_argument_type_change(java_lang_invoke_MethodType::ptype(src_mtype(), src_arg), | |
2024 java_lang_invoke_MethodType::ptype(dst_mtype(), dest_arg), | |
2025 src_arg); | |
2026 break; | |
2027 } | |
2028 case _adapter_rot_args: | |
2029 { | |
2030 if (!src || !dest) { | |
2031 err = "adapter requires src/dest conversion subfields for rotate"; break; | |
2032 } | |
2033 int src_slot = argslot; | |
2034 int limit_raw = vminfo; | |
2035 bool rot_down = (src_slot < limit_raw); | |
2036 int limit_bias = (rot_down ? MethodHandles::OP_ROT_ARGS_DOWN_LIMIT_BIAS : 0); | |
2037 int limit_slot = limit_raw - limit_bias; | |
2038 int src_arg = argnum; | |
2039 int limit_arg = argument_slot_to_argnum(src_mtype(), limit_slot); | |
2040 verify_vmargslot(mh, limit_arg, limit_slot, CHECK); | |
2041 if (src_slot == limit_slot) { | |
2042 err = "source, destination slots must be distinct"; break; | |
2043 } | |
2044 if (!rot_down) { // rotate slots up == shift arguments left | |
2045 // limit_slot is an inclusive lower limit | |
2046 assert((src_slot > limit_slot) && (src_arg < limit_arg), ""); | |
2047 // rotate up: [limit_slot..src_slot-ss] --> [limit_slot+ss..src_slot] | |
2048 // that is: [src_arg+1..limit_arg] --> [src_arg..limit_arg-1] | |
2049 for (int i = src_arg+1; i <= limit_arg && err == NULL; i++) { | |
2050 err = check_argument_type_change(java_lang_invoke_MethodType::ptype(src_mtype(), i), | |
2051 java_lang_invoke_MethodType::ptype(dst_mtype(), i-1), | |
2052 i); | |
2053 } | |
2054 } else { // rotate slots down == shfit arguments right | |
2055 // limit_slot is an exclusive upper limit | |
2056 assert((src_slot < limit_slot - limit_bias) && (src_arg > limit_arg + limit_bias), ""); | |
2057 // rotate down: [src_slot+ss..limit_slot) --> [src_slot..limit_slot-ss) | |
2058 // that is: (limit_arg..src_arg-1] --> (dst_arg+1..src_arg] | |
2059 for (int i = limit_arg+1; i <= src_arg-1 && err == NULL; i++) { | |
2060 err = check_argument_type_change(java_lang_invoke_MethodType::ptype(src_mtype(), i), | |
2061 java_lang_invoke_MethodType::ptype(dst_mtype(), i+1), | |
2062 i); | |
2063 } | |
2064 } | |
2065 if (err == NULL) { | |
2066 int dest_arg = (rot_down ? limit_arg+1 : limit_arg); | |
2067 err = check_argument_type_change(java_lang_invoke_MethodType::ptype(src_mtype(), src_arg), | |
2068 java_lang_invoke_MethodType::ptype(dst_mtype(), dest_arg), | |
2069 src_arg); | |
2070 } | |
2071 } | |
2072 break; | |
2073 case _adapter_spread_args: | |
2074 case _adapter_collect_args: | |
2075 case _adapter_fold_args: | |
2076 { | |
2077 bool is_spread = (ek == _adapter_spread_args); | |
2078 bool is_fold = (ek == _adapter_fold_args); | |
2079 BasicType coll_type = is_spread ? src : dest; | |
2080 BasicType elem_type = is_spread ? dest : src; | |
2081 // coll_type is type of args in collected form (or T_VOID if none) | |
2082 // elem_type is common type of args in spread form (or T_VOID if missing or heterogeneous) | |
2083 if (coll_type == 0 || elem_type == 0) { | |
2084 err = "adapter requires src/dest subfields for spread or collect"; break; | |
2085 } | |
2086 if (is_spread && coll_type != T_OBJECT) { | |
2087 err = "spread adapter requires object type for argument bundle"; break; | |
2088 } | |
2089 Handle spread_mtype = (is_spread ? dst_mtype : src_mtype); | |
2090 int spread_slot = argslot; | |
2091 int spread_arg = argnum; | |
2092 int slots_pushed = stack_move / stack_move_unit(); | |
2093 int coll_slot_count = type2size[coll_type]; | |
2094 int spread_slot_count = (is_spread ? slots_pushed : -slots_pushed) + coll_slot_count; | |
2095 if (is_fold) spread_slot_count = argument_slot_count(arg_mtype()); | |
2096 if (!is_spread) { | |
2097 int init_slots = argument_slot_count(src_mtype()); | |
2098 int coll_slots = argument_slot_count(arg_mtype()); | |
2099 if (spread_slot_count > init_slots || | |
2100 spread_slot_count != coll_slots) { | |
2101 err = "collect adapter has inconsistent arg counts"; break; | |
2102 } | |
2103 int next_slots = argument_slot_count(dst_mtype()); | |
2104 int unchanged_slots_in = (init_slots - spread_slot_count); | |
2105 int unchanged_slots_out = (next_slots - coll_slot_count - (is_fold ? spread_slot_count : 0)); | |
2106 if (unchanged_slots_in != unchanged_slots_out) { | |
2107 err = "collect adapter continuation has inconsistent arg counts"; break; | |
2108 } | |
2109 } | |
2110 } | |
2111 break; | |
2112 default: | |
2113 if (src != 0 || dest != 0) { | |
2114 err = "adapter has spurious src/dest conversion subfields"; break; | |
2115 } | |
2116 break; | |
2117 } | |
2118 } | |
2119 | |
2120 if (err == NULL) { | |
2121 // Check the stack_move subfield. | |
2122 // It must always report the net change in stack size, positive or negative. | |
2123 int slots_pushed = stack_move / stack_move_unit(); | |
2124 switch (ek) { | |
2125 case _adapter_prim_to_prim: | |
2126 case _adapter_ref_to_prim: | |
2127 case _adapter_prim_to_ref: | |
2128 if (slots_pushed != type2size[dest] - type2size[src]) { | |
2129 err = "wrong stack motion for primitive conversion"; | |
2130 } | |
2131 break; | |
2132 case _adapter_dup_args: | |
2133 if (slots_pushed <= 0) { | |
2134 err = "adapter requires conversion subfield slots_pushed > 0"; | |
2135 } | |
2136 break; | |
2137 case _adapter_drop_args: | |
2138 if (slots_pushed >= 0) { | |
2139 err = "adapter requires conversion subfield slots_pushed < 0"; | |
2140 } | |
2141 break; | |
2142 case _adapter_collect_args: | |
2143 case _adapter_fold_args: | |
2144 if (slots_pushed > 2) { | |
2145 err = "adapter requires conversion subfield slots_pushed <= 2"; | |
2146 } | |
2147 break; | |
2148 case _adapter_spread_args: | |
2149 if (slots_pushed < -1) { | |
2150 err = "adapter requires conversion subfield slots_pushed >= -1"; | |
2151 } | |
2152 break; | |
2153 default: | |
2154 if (stack_move != 0) { | |
2155 err = "adapter has spurious stack_move conversion subfield"; | |
2156 } | |
2157 break; | |
2158 } | |
2159 if (err == NULL && stack_move != slots_pushed * stack_move_unit()) { | |
2160 err = "stack_move conversion subfield must be multiple of stack_move_unit"; | |
2161 } | |
2162 } | |
2163 | |
2164 if (err == NULL) { | |
2165 // Make sure this adapter's stack pushing is accurately recorded. | |
2166 int slots_pushed = stack_move / stack_move_unit(); | |
2167 int this_vmslots = java_lang_invoke_MethodHandle::vmslots(mh()); | |
2168 int target_vmslots = java_lang_invoke_MethodHandle::vmslots(target()); | |
2169 int target_pushes = decode_MethodHandle_stack_pushes(target()); | |
2170 if (slots_pushed != (target_vmslots - this_vmslots)) { | |
2171 err = "stack_move inconsistent with previous and current MethodType vmslots"; | |
2172 } else { | |
2173 int this_pushes = decode_MethodHandle_stack_pushes(mh()); | |
2174 if (slots_pushed + target_pushes != this_pushes) { | |
2175 if (this_pushes == 0) | |
2176 err = "adapter push count not initialized"; | |
2177 else | |
2178 err = "adapter push count is wrong"; | |
2179 } | |
2180 } | |
2181 | |
2182 // While we're at it, check that the stack motion decoder works: | |
2183 DEBUG_ONLY(int this_pushes = decode_MethodHandle_stack_pushes(mh())); | |
2184 assert(this_pushes == slots_pushed + target_pushes, "AMH stack motion must be correct"); | |
2185 } | |
2186 | |
2187 if (err == NULL && vminfo != 0) { | |
2188 switch (ek) { | |
2189 case _adapter_swap_args: | |
2190 case _adapter_rot_args: | |
2191 case _adapter_prim_to_ref: | |
2192 case _adapter_collect_args: | |
2193 case _adapter_fold_args: | |
2194 break; // OK | |
2195 default: | |
2196 err = "vminfo subfield is reserved to the JVM"; | |
2197 } | |
2198 } | |
2199 | |
2200 // Do additional ad hoc checks. | |
2201 if (err == NULL) { | |
2202 switch (ek) { | |
2203 case _adapter_retype_only: | |
2204 err = check_method_type_passthrough(src_mtype(), dst_mtype(), false); | |
2205 break; | |
2206 | |
2207 case _adapter_retype_raw: | |
2208 err = check_method_type_passthrough(src_mtype(), dst_mtype(), true); | |
2209 break; | |
2210 | |
2211 case _adapter_check_cast: | |
2212 { | |
2213 // The actual value being checked must be a reference: | |
2214 err = check_argument_type_change(java_lang_invoke_MethodType::ptype(src_mtype(), argnum), | |
2215 object_java_mirror(), argnum); | |
2216 if (err != NULL) break; | |
2217 | |
2218 // The output of the cast must fit with the destination argument: | |
2219 Handle cast_class = argument; | |
2220 err = check_method_type_conversion(src_mtype(), | |
2221 argnum, cast_class(), | |
2222 dst_mtype()); | |
2223 } | |
2224 break; | |
2225 | |
2226 // %%% TO DO: continue in remaining cases to verify src/dst_mtype if VerifyMethodHandles | |
2227 } | |
2228 } | |
2229 | |
2230 if (err != NULL) { | |
2231 throw_InternalError_for_bad_conversion(conversion, err, THREAD); | |
2232 return; | |
2233 } | |
2234 | |
2235 } | |
2236 | |
2237 void MethodHandles::init_AdapterMethodHandle(Handle mh, Handle target, int argnum, TRAPS) { | |
2238 Handle argument = java_lang_invoke_AdapterMethodHandle::argument(mh()); | |
2239 int argslot = java_lang_invoke_AdapterMethodHandle::vmargslot(mh()); | |
2240 jint conversion = java_lang_invoke_AdapterMethodHandle::conversion(mh()); | |
2241 jint conv_op = adapter_conversion_op(conversion); | |
2242 | |
2243 // adjust the adapter code to the internal EntryKind enumeration: | |
2244 EntryKind ek_orig = adapter_entry_kind(conv_op); | |
2245 EntryKind ek_opt = ek_orig; // may be optimized | |
2246 EntryKind ek_try; // temp | |
2247 | |
2248 // Finalize the vmtarget field (Java initialized it to null). | |
2249 if (!java_lang_invoke_MethodHandle::is_instance(target())) { | |
2250 throw_InternalError_for_bad_conversion(conversion, "bad target", THREAD); | |
2251 return; | |
2252 } | |
2253 java_lang_invoke_AdapterMethodHandle::set_vmtarget(mh(), target()); | |
2254 | |
2255 int stack_move = adapter_conversion_stack_move(conversion); | |
2256 BasicType src = adapter_conversion_src_type(conversion); | |
2257 BasicType dest = adapter_conversion_dest_type(conversion); | |
2258 int vminfo = adapter_conversion_vminfo(conversion); // should be zero | |
2259 | |
2260 int slots_pushed = stack_move / stack_move_unit(); | |
2261 | |
2262 if (VerifyMethodHandles) { | |
2263 verify_AdapterMethodHandle(mh, argnum, CHECK); | |
2264 } | |
2265 | |
2266 const char* err = NULL; | |
2267 | |
2268 if (!conv_op_supported(conv_op)) { | |
2269 err = "adapter not yet implemented in the JVM"; | |
2270 } | |
2271 | |
2272 // Now it's time to finish the case analysis and pick a MethodHandleEntry. | |
2273 switch (ek_orig) { | |
2274 case _adapter_retype_only: | |
2275 case _adapter_retype_raw: | |
2276 case _adapter_check_cast: | |
2277 case _adapter_dup_args: | |
2278 case _adapter_drop_args: | |
2279 // these work fine via general case code | |
2280 break; | |
2281 | |
2282 case _adapter_prim_to_prim: | |
2283 { | |
2284 // Non-subword cases are {int,float,long,double} -> {int,float,long,double}. | |
2285 // And, the {float,double} -> {int,long} cases must be handled by Java. | |
2286 switch (type2size[src] *4+ type2size[dest]) { | |
2287 case 1 *4+ 1: | |
2288 assert(src == T_INT || is_subword_type(src), "source is not float"); | |
2289 // Subword-related cases are int -> {boolean,byte,char,short}. | |
2290 ek_opt = _adapter_opt_i2i; | |
2291 vminfo = adapter_prim_to_prim_subword_vminfo(dest); | |
2292 break; | |
2293 case 2 *4+ 1: | |
2294 if (src == T_LONG && (dest == T_INT || is_subword_type(dest))) { | |
2295 ek_opt = _adapter_opt_l2i; | |
2296 vminfo = adapter_prim_to_prim_subword_vminfo(dest); | |
2297 } else if (src == T_DOUBLE && dest == T_FLOAT) { | |
2298 ek_opt = _adapter_opt_d2f; | |
2299 } else { | |
2300 goto throw_not_impl; // runs user code, hence could block | |
2301 } | |
2302 break; | |
2303 case 1 *4+ 2: | |
2304 if ((src == T_INT || is_subword_type(src)) && dest == T_LONG) { | |
2305 ek_opt = _adapter_opt_i2l; | |
2306 } else if (src == T_FLOAT && dest == T_DOUBLE) { | |
2307 ek_opt = _adapter_opt_f2d; | |
2308 } else { | |
2309 goto throw_not_impl; // runs user code, hence could block | |
2310 } | |
2311 break; | |
2312 default: | |
2313 goto throw_not_impl; // runs user code, hence could block | |
2314 break; | |
2315 } | |
2316 } | |
2317 break; | |
2318 | |
2319 case _adapter_ref_to_prim: | |
2320 { | |
2321 switch (type2size[dest]) { | |
2322 case 1: | |
2323 ek_opt = _adapter_opt_unboxi; | |
2324 vminfo = adapter_unbox_subword_vminfo(dest); | |
2325 break; | |
2326 case 2: | |
2327 ek_opt = _adapter_opt_unboxl; | |
2328 break; | |
2329 default: | |
2330 goto throw_not_impl; | |
2331 break; | |
2332 } | |
2333 } | |
2334 break; | |
2335 | |
2336 case _adapter_prim_to_ref: | |
2337 { | |
2338 // vminfo will be the location to insert the return value | |
2339 vminfo = argslot; | |
2340 ek_opt = _adapter_opt_collect_ref; | |
2341 ensure_vmlayout_field(target, CHECK); | |
2342 // for MethodHandleWalk: | |
2343 if (java_lang_invoke_AdapterMethodHandle::is_instance(argument())) | |
2344 ensure_vmlayout_field(argument, CHECK); | |
2345 if (!OptimizeMethodHandles) break; | |
2346 switch (type2size[src]) { | |
2347 case 1: | |
2348 ek_try = EntryKind(_adapter_opt_filter_S0_ref + argslot); | |
2349 if (ek_try < _adapter_opt_collect_LAST && | |
2350 ek_adapter_opt_collect_slot(ek_try) == argslot) { | |
2351 assert(ek_adapter_opt_collect_count(ek_try) == 1 && | |
2352 ek_adapter_opt_collect_type(ek_try) == T_OBJECT, ""); | |
2353 ek_opt = ek_try; | |
2354 break; | |
2355 } | |
2356 // else downgrade to variable slot: | |
2357 ek_opt = _adapter_opt_collect_1_ref; | |
2358 break; | |
2359 case 2: | |
2360 ek_try = EntryKind(_adapter_opt_collect_2_S0_ref + argslot); | |
2361 if (ek_try < _adapter_opt_collect_LAST && | |
2362 ek_adapter_opt_collect_slot(ek_try) == argslot) { | |
2363 assert(ek_adapter_opt_collect_count(ek_try) == 2 && | |
2364 ek_adapter_opt_collect_type(ek_try) == T_OBJECT, ""); | |
2365 ek_opt = ek_try; | |
2366 break; | |
2367 } | |
2368 // else downgrade to variable slot: | |
2369 ek_opt = _adapter_opt_collect_2_ref; | |
2370 break; | |
2371 default: | |
2372 goto throw_not_impl; | |
2373 break; | |
2374 } | |
2375 } | |
2376 break; | |
2377 | |
2378 case _adapter_swap_args: | |
2379 case _adapter_rot_args: | |
2380 { | |
2381 int swap_slots = type2size[src]; | |
2382 int src_slot = argslot; | |
2383 int dest_slot = vminfo; | |
2384 int rotate = (ek_orig == _adapter_swap_args) ? 0 : (src_slot > dest_slot) ? 1 : -1; | |
2385 switch (swap_slots) { | |
2386 case 1: | |
2387 ek_opt = (!rotate ? _adapter_opt_swap_1 : | |
2388 rotate > 0 ? _adapter_opt_rot_1_up : _adapter_opt_rot_1_down); | |
2389 break; | |
2390 case 2: | |
2391 ek_opt = (!rotate ? _adapter_opt_swap_2 : | |
2392 rotate > 0 ? _adapter_opt_rot_2_up : _adapter_opt_rot_2_down); | |
2393 break; | |
2394 default: | |
2395 goto throw_not_impl; | |
2396 break; | |
2397 } | |
2398 } | |
2399 break; | |
2400 | |
2401 case _adapter_spread_args: | |
2402 { | |
2403 // vminfo will be the required length of the array | |
2404 int array_size = (slots_pushed + 1) / (type2size[dest] == 2 ? 2 : 1); | |
2405 vminfo = array_size; | |
2406 // general case | |
2407 switch (dest) { | |
2408 case T_BOOLEAN : // fall through to T_BYTE: | |
2409 case T_BYTE : ek_opt = _adapter_opt_spread_byte; break; | |
2410 case T_CHAR : ek_opt = _adapter_opt_spread_char; break; | |
2411 case T_SHORT : ek_opt = _adapter_opt_spread_short; break; | |
2412 case T_INT : ek_opt = _adapter_opt_spread_int; break; | |
2413 case T_LONG : ek_opt = _adapter_opt_spread_long; break; | |
2414 case T_FLOAT : ek_opt = _adapter_opt_spread_float; break; | |
2415 case T_DOUBLE : ek_opt = _adapter_opt_spread_double; break; | |
2416 case T_OBJECT : ek_opt = _adapter_opt_spread_ref; break; | |
2417 case T_VOID : if (array_size != 0) goto throw_not_impl; | |
2418 ek_opt = _adapter_opt_spread_ref; break; | |
2419 default : goto throw_not_impl; | |
2420 } | |
2421 assert(array_size == 0 || // it doesn't matter what the spreader is | |
2422 (ek_adapter_opt_spread_count(ek_opt) == -1 && | |
2423 (ek_adapter_opt_spread_type(ek_opt) == dest || | |
2424 (ek_adapter_opt_spread_type(ek_opt) == T_BYTE && dest == T_BOOLEAN))), | |
2425 err_msg("dest=%d ek_opt=%d", dest, ek_opt)); | |
2426 | |
2427 if (array_size <= 0) { | |
2428 // since the general case does not handle length 0, this case is required: | |
2429 ek_opt = _adapter_opt_spread_0; | |
2430 break; | |
2431 } | |
2432 if (dest == T_OBJECT) { | |
2433 ek_try = EntryKind(_adapter_opt_spread_1_ref - 1 + array_size); | |
2434 if (ek_try < _adapter_opt_spread_LAST && | |
2435 ek_adapter_opt_spread_count(ek_try) == array_size) { | |
2436 assert(ek_adapter_opt_spread_type(ek_try) == dest, ""); | |
2437 ek_opt = ek_try; | |
2438 break; | |
2439 } | |
2440 } | |
2441 break; | |
2442 } | |
2443 break; | |
2444 | |
2445 case _adapter_collect_args: | |
2446 { | |
2447 int elem_slots = argument_slot_count(java_lang_invoke_MethodHandle::type(argument())); | |
2448 // vminfo will be the location to insert the return value | |
2449 vminfo = argslot; | |
2450 ensure_vmlayout_field(target, CHECK); | |
2451 ensure_vmlayout_field(argument, CHECK); | |
2452 | |
2453 // general case: | |
2454 switch (dest) { | |
2455 default : if (!is_subword_type(dest)) goto throw_not_impl; | |
2456 // else fall through: | |
2457 case T_INT : ek_opt = _adapter_opt_collect_int; break; | |
2458 case T_LONG : ek_opt = _adapter_opt_collect_long; break; | |
2459 case T_FLOAT : ek_opt = _adapter_opt_collect_float; break; | |
2460 case T_DOUBLE : ek_opt = _adapter_opt_collect_double; break; | |
2461 case T_OBJECT : ek_opt = _adapter_opt_collect_ref; break; | |
2462 case T_VOID : ek_opt = _adapter_opt_collect_void; break; | |
2463 } | |
2464 assert(ek_adapter_opt_collect_slot(ek_opt) == -1 && | |
2465 ek_adapter_opt_collect_count(ek_opt) == -1 && | |
2466 (ek_adapter_opt_collect_type(ek_opt) == dest || | |
2467 ek_adapter_opt_collect_type(ek_opt) == T_INT && is_subword_type(dest)), | |
2468 ""); | |
2469 | |
2470 if (dest == T_OBJECT && elem_slots == 1 && OptimizeMethodHandles) { | |
2471 // filter operation on a ref | |
2472 ek_try = EntryKind(_adapter_opt_filter_S0_ref + argslot); | |
2473 if (ek_try < _adapter_opt_collect_LAST && | |
2474 ek_adapter_opt_collect_slot(ek_try) == argslot) { | |
2475 assert(ek_adapter_opt_collect_count(ek_try) == elem_slots && | |
2476 ek_adapter_opt_collect_type(ek_try) == dest, ""); | |
2477 ek_opt = ek_try; | |
2478 break; | |
2479 } | |
2480 ek_opt = _adapter_opt_collect_1_ref; | |
2481 break; | |
2482 } | |
2483 | |
2484 if (dest == T_OBJECT && elem_slots == 2 && OptimizeMethodHandles) { | |
2485 // filter of two arguments | |
2486 ek_try = EntryKind(_adapter_opt_collect_2_S0_ref + argslot); | |
2487 if (ek_try < _adapter_opt_collect_LAST && | |
2488 ek_adapter_opt_collect_slot(ek_try) == argslot) { | |
2489 assert(ek_adapter_opt_collect_count(ek_try) == elem_slots && | |
2490 ek_adapter_opt_collect_type(ek_try) == dest, ""); | |
2491 ek_opt = ek_try; | |
2492 break; | |
2493 } | |
2494 ek_opt = _adapter_opt_collect_2_ref; | |
2495 break; | |
2496 } | |
2497 | |
2498 if (dest == T_OBJECT && OptimizeMethodHandles) { | |
2499 // try to use a fixed length adapter | |
2500 ek_try = EntryKind(_adapter_opt_collect_0_ref + elem_slots); | |
2501 if (ek_try < _adapter_opt_collect_LAST && | |
2502 ek_adapter_opt_collect_count(ek_try) == elem_slots) { | |
2503 assert(ek_adapter_opt_collect_slot(ek_try) == -1 && | |
2504 ek_adapter_opt_collect_type(ek_try) == dest, ""); | |
2505 ek_opt = ek_try; | |
2506 break; | |
2507 } | |
2508 } | |
2509 | |
2510 break; | |
2511 } | |
2512 | |
2513 case _adapter_fold_args: | |
2514 { | |
2515 int elem_slots = argument_slot_count(java_lang_invoke_MethodHandle::type(argument())); | |
2516 // vminfo will be the location to insert the return value | |
2517 vminfo = argslot + elem_slots; | |
2518 ensure_vmlayout_field(target, CHECK); | |
2519 ensure_vmlayout_field(argument, CHECK); | |
2520 | |
2521 switch (dest) { | |
2522 default : if (!is_subword_type(dest)) goto throw_not_impl; | |
2523 // else fall through: | |
2524 case T_INT : ek_opt = _adapter_opt_fold_int; break; | |
2525 case T_LONG : ek_opt = _adapter_opt_fold_long; break; | |
2526 case T_FLOAT : ek_opt = _adapter_opt_fold_float; break; | |
2527 case T_DOUBLE : ek_opt = _adapter_opt_fold_double; break; | |
2528 case T_OBJECT : ek_opt = _adapter_opt_fold_ref; break; | |
2529 case T_VOID : ek_opt = _adapter_opt_fold_void; break; | |
2530 } | |
2531 assert(ek_adapter_opt_collect_slot(ek_opt) == -1 && | |
2532 ek_adapter_opt_collect_count(ek_opt) == -1 && | |
2533 (ek_adapter_opt_collect_type(ek_opt) == dest || | |
2534 ek_adapter_opt_collect_type(ek_opt) == T_INT && is_subword_type(dest)), | |
2535 ""); | |
2536 | |
2537 if (dest == T_OBJECT && elem_slots == 0 && OptimizeMethodHandles) { | |
2538 // if there are no args, just pretend it's a collect | |
2539 ek_opt = _adapter_opt_collect_0_ref; | |
2540 break; | |
2541 } | |
2542 | |
2543 if (dest == T_OBJECT && OptimizeMethodHandles) { | |
2544 // try to use a fixed length adapter | |
2545 ek_try = EntryKind(_adapter_opt_fold_1_ref - 1 + elem_slots); | |
2546 if (ek_try < _adapter_opt_fold_LAST && | |
2547 ek_adapter_opt_collect_count(ek_try) == elem_slots) { | |
2548 assert(ek_adapter_opt_collect_slot(ek_try) == -1 && | |
2549 ek_adapter_opt_collect_type(ek_try) == dest, ""); | |
2550 ek_opt = ek_try; | |
2551 break; | |
2552 } | |
2553 } | |
2554 | |
2555 break; | |
2556 } | |
2557 | |
2558 default: | |
2559 // should have failed much earlier; must be a missing case here | |
2560 assert(false, "incomplete switch"); | |
2561 // and fall through: | |
2562 | |
2563 throw_not_impl: | |
2564 if (err == NULL) | |
2565 err = "unknown adapter type"; | |
2566 break; | |
2567 } | |
2568 | |
2569 if (err == NULL && (vminfo & CONV_VMINFO_MASK) != vminfo) { | |
2570 // should not happen, since vminfo is used to encode arg/slot indexes < 255 | |
2571 err = "vminfo overflow"; | |
2572 } | |
2573 | |
2574 if (err == NULL && !have_entry(ek_opt)) { | |
2575 err = "adapter stub for this kind of method handle is missing"; | |
2576 } | |
2577 | |
2578 if (err == NULL && ek_opt == ek_orig) { | |
2579 switch (ek_opt) { | |
2580 case _adapter_prim_to_prim: | |
2581 case _adapter_ref_to_prim: | |
2582 case _adapter_prim_to_ref: | |
2583 case _adapter_swap_args: | |
2584 case _adapter_rot_args: | |
2585 case _adapter_collect_args: | |
2586 case _adapter_fold_args: | |
2587 case _adapter_spread_args: | |
2588 // should be handled completely by optimized cases; see above | |
2589 err = "init_AdapterMethodHandle should not issue this"; | |
2590 break; | |
2591 } | |
2592 } | |
2593 | |
2594 if (err != NULL) { | |
2595 throw_InternalError_for_bad_conversion(conversion, err_msg("%s: conv_op %d ek_opt %d", err, conv_op, ek_opt), THREAD); | |
2596 return; | |
2597 } | |
2598 | |
2599 // Rebuild the conversion value; maybe parts of it were changed. | |
2600 jint new_conversion = adapter_conversion(conv_op, src, dest, stack_move, vminfo); | |
2601 | |
2602 // Finalize the conversion field. (Note that it is final to Java code.) | |
2603 java_lang_invoke_AdapterMethodHandle::set_conversion(mh(), new_conversion); | |
2604 | |
2605 if (java_lang_invoke_CountingMethodHandle::is_instance(mh())) { | |
2606 assert(ek_orig == _adapter_retype_only, "only one handled"); | |
2607 ek_opt = _adapter_opt_profiling; | |
2608 } | |
2609 | |
2610 // Done! | |
2611 java_lang_invoke_MethodHandle::set_vmentry(mh(), entry(ek_opt)); | |
2612 | |
2613 // There should be enough memory barriers on exit from native methods | |
2614 // to ensure that the MH is fully initialized to all threads before | |
2615 // Java code can publish it in global data structures. | |
2616 } | |
2617 | |
2618 void MethodHandles::ensure_vmlayout_field(Handle target, TRAPS) { | |
2619 Handle mtype(THREAD, java_lang_invoke_MethodHandle::type(target())); | |
2620 Handle mtform(THREAD, java_lang_invoke_MethodType::form(mtype())); | |
2621 if (mtform.is_null()) { THROW(vmSymbols::java_lang_InternalError()); } | |
2622 if (java_lang_invoke_MethodTypeForm::vmlayout_offset_in_bytes() > 0) { | |
2623 if (java_lang_invoke_MethodTypeForm::vmlayout(mtform()) == NULL) { | |
2624 // fill it in | |
2625 Handle erased_mtype(THREAD, java_lang_invoke_MethodTypeForm::erasedType(mtform())); | |
2626 TempNewSymbol erased_signature | |
2627 = java_lang_invoke_MethodType::as_signature(erased_mtype(), /*intern:*/true, CHECK); | |
2628 methodOop cookie | |
2629 = SystemDictionary::find_method_handle_invoke(vmSymbols::invokeExact_name(), | |
2630 erased_signature, | |
2631 SystemDictionaryHandles::Object_klass(), | |
2632 THREAD); | |
2633 java_lang_invoke_MethodTypeForm::init_vmlayout(mtform(), cookie); | |
2634 } | |
2635 } | |
2636 assert(java_lang_invoke_MethodTypeForm::vmslots(mtform()) == argument_slot_count(mtype()), "must agree"); | |
2637 } | |
2638 | |
2639 #ifdef ASSERT | |
2640 | |
2641 extern "C" | |
2642 void print_method_handle(oop mh); | |
2643 | |
2644 static void stress_method_handle_walk_impl(Handle mh, TRAPS) { | |
2645 if (StressMethodHandleWalk) { | |
2646 // Exercise the MethodHandleWalk code in various ways and validate | |
2647 // the resulting method oop. Some of these produce output so they | |
2648 // are guarded under Verbose. | |
2649 ResourceMark rm; | |
2650 HandleMark hm; | |
2651 if (Verbose) { | |
2652 print_method_handle(mh()); | |
2653 } | |
2654 TempNewSymbol name = SymbolTable::new_symbol("invoke", CHECK); | |
2655 Handle mt = java_lang_invoke_MethodHandle::type(mh()); | |
2656 TempNewSymbol signature = java_lang_invoke_MethodType::as_signature(mt(), true, CHECK); | |
2657 MethodHandleCompiler mhc(mh, name, signature, 10000, false, CHECK); | |
2658 methodHandle m = mhc.compile(CHECK); | |
2659 if (Verbose) { | |
2660 m->print_codes(); | |
2661 } | |
2662 InterpreterOopMap mask; | |
2663 OopMapCache::compute_one_oop_map(m, m->code_size() - 1, &mask); | |
2664 // compile to object code if -Xcomp or WizardMode | |
2665 if ((WizardMode || | |
2666 CompilationPolicy::must_be_compiled(m)) | |
2667 && !instanceKlass::cast(m->method_holder())->is_not_initialized() | |
2668 && CompilationPolicy::can_be_compiled(m)) { | |
2669 // Force compilation | |
2670 CompileBroker::compile_method(m, InvocationEntryBci, | |
2671 CompilationPolicy::policy()->initial_compile_level(), | |
2672 methodHandle(), 0, "StressMethodHandleWalk", | |
2673 CHECK); | |
2674 } | |
2675 } | |
2676 } | |
2677 | |
2678 static void stress_method_handle_walk(Handle mh, TRAPS) { | |
2679 stress_method_handle_walk_impl(mh, THREAD); | |
2680 if (HAS_PENDING_EXCEPTION) { | |
2681 oop ex = PENDING_EXCEPTION; | |
2682 CLEAR_PENDING_EXCEPTION; | |
2683 tty->print("StressMethodHandleWalk: "); | |
2684 java_lang_Throwable::print(ex, tty); | |
2685 tty->cr(); | |
2686 } | |
2687 } | |
2688 #else | |
2689 | |
2690 static void stress_method_handle_walk(Handle mh, TRAPS) {} | |
2691 | |
2692 #endif | |
2693 | |
2694 // | 923 // |
2695 // Here are the native methods on sun.invoke.MethodHandleImpl. | 924 // Here are the native methods in java.lang.invoke.MethodHandleNatives |
2696 // They are the private interface between this JVM and the HotSpot-specific | 925 // They are the private interface between this JVM and the HotSpot-specific |
2697 // Java code that implements JSR 292 method handles. | 926 // Java code that implements JSR 292 method handles. |
2698 // | 927 // |
2699 // Note: We use a JVM_ENTRY macro to define each of these, for this is the way | 928 // Note: We use a JVM_ENTRY macro to define each of these, for this is the way |
2700 // that intrinsic (non-JNI) native methods are defined in HotSpot. | 929 // that intrinsic (non-JNI) native methods are defined in HotSpot. |
2701 // | 930 // |
2702 | |
2703 // direct method handles for invokestatic or invokespecial | |
2704 // void init(DirectMethodHandle self, MemberName ref, boolean doDispatch, Class<?> caller); | |
2705 JVM_ENTRY(void, MHN_init_DMH(JNIEnv *env, jobject igcls, jobject mh_jh, | |
2706 jobject target_jh, jboolean do_dispatch, jobject caller_jh)) { | |
2707 ResourceMark rm; // for error messages | |
2708 | |
2709 // This is the guy we are initializing: | |
2710 if (mh_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "self is null"); } | |
2711 Handle mh(THREAD, JNIHandles::resolve_non_null(mh_jh)); | |
2712 | |
2713 // Early returns out of this method leave the DMH in an unfinished state. | |
2714 assert(java_lang_invoke_MethodHandle::vmentry(mh()) == NULL, "must be safely null"); | |
2715 | |
2716 // which method are we really talking about? | |
2717 if (target_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "target is null"); } | |
2718 Handle target(THREAD, JNIHandles::resolve_non_null(target_jh)); | |
2719 if (java_lang_invoke_MemberName::is_instance(target()) && | |
2720 java_lang_invoke_MemberName::vmindex(target()) == VM_INDEX_UNINITIALIZED) { | |
2721 MethodHandles::resolve_MemberName(target, CHECK); | |
2722 } | |
2723 | |
2724 KlassHandle receiver_limit; int decode_flags = 0; | |
2725 methodHandle m = MethodHandles::decode_method(target(), receiver_limit, decode_flags); | |
2726 if (m.is_null()) { THROW_MSG(vmSymbols::java_lang_InternalError(), "no such method"); } | |
2727 | |
2728 // The trusted Java code that calls this method should already have performed | |
2729 // access checks on behalf of the given caller. But, we can verify this. | |
2730 if (VerifyMethodHandles && caller_jh != NULL) { | |
2731 KlassHandle caller(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(caller_jh))); | |
2732 // If this were a bytecode, the first access check would be against | |
2733 // the "reference class" mentioned in the CONSTANT_Methodref. | |
2734 // We don't know at this point which class that was, and if we | |
2735 // check against m.method_holder we might get the wrong answer. | |
2736 // So we just make sure to handle this check when the resolution | |
2737 // happens, when we call resolve_MemberName. | |
2738 // | |
2739 // (A public class can inherit public members from private supers, | |
2740 // and it would be wrong to check access against the private super | |
2741 // if the original symbolic reference was against the public class.) | |
2742 // | |
2743 // If there were a bytecode, the next step would be to lookup the method | |
2744 // in the reference class, then then check the method's access bits. | |
2745 // Emulate LinkResolver::check_method_accessability. | |
2746 klassOop resolved_klass = m->method_holder(); | |
2747 if (!Reflection::verify_field_access(caller->as_klassOop(), | |
2748 resolved_klass, resolved_klass, | |
2749 m->access_flags(), | |
2750 true)) { | |
2751 // %%% following cutout belongs in Reflection::verify_field_access? | |
2752 bool same_pm = Reflection::is_same_package_member(caller->as_klassOop(), | |
2753 resolved_klass, THREAD); | |
2754 if (!same_pm) { | |
2755 THROW_MSG(vmSymbols::java_lang_InternalError(), m->name_and_sig_as_C_string()); | |
2756 } | |
2757 } | |
2758 } | |
2759 | |
2760 MethodHandles::init_DirectMethodHandle(mh, m, (do_dispatch != JNI_FALSE), CHECK); | |
2761 stress_method_handle_walk(mh, CHECK); | |
2762 } | |
2763 JVM_END | |
2764 | |
2765 // bound method handles | |
2766 JVM_ENTRY(void, MHN_init_BMH(JNIEnv *env, jobject igcls, jobject mh_jh, | |
2767 jobject target_jh, int argnum)) { | |
2768 ResourceMark rm; // for error messages | |
2769 | |
2770 // This is the guy we are initializing: | |
2771 if (mh_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "self is null"); } | |
2772 Handle mh(THREAD, JNIHandles::resolve_non_null(mh_jh)); | |
2773 | |
2774 // Early returns out of this method leave the BMH in an unfinished state. | |
2775 assert(java_lang_invoke_MethodHandle::vmentry(mh()) == NULL, "must be safely null"); | |
2776 | |
2777 if (target_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "target is null"); } | |
2778 Handle target(THREAD, JNIHandles::resolve_non_null(target_jh)); | |
2779 | |
2780 if (!java_lang_invoke_MethodHandle::is_instance(target())) { | |
2781 // Target object is a reflective method. (%%% Do we need this alternate path?) | |
2782 Untested("init_BMH of non-MH"); | |
2783 if (argnum != 0) { THROW(vmSymbols::java_lang_InternalError()); } | |
2784 KlassHandle receiver_limit; int decode_flags = 0; | |
2785 methodHandle m = MethodHandles::decode_method(target(), receiver_limit, decode_flags); | |
2786 MethodHandles::init_BoundMethodHandle_with_receiver(mh, m, | |
2787 receiver_limit, | |
2788 decode_flags, | |
2789 CHECK); | |
2790 } else { | |
2791 // Build a BMH on top of a DMH or another BMH: | |
2792 MethodHandles::init_BoundMethodHandle(mh, target, argnum, CHECK); | |
2793 } | |
2794 | |
2795 if (StressMethodHandleWalk) { | |
2796 if (mh->klass() == SystemDictionary::BoundMethodHandle_klass()) | |
2797 stress_method_handle_walk(mh, CHECK); | |
2798 // else don't, since the subclass has not yet initialized its own fields | |
2799 } | |
2800 } | |
2801 JVM_END | |
2802 | |
2803 // adapter method handles | |
2804 JVM_ENTRY(void, MHN_init_AMH(JNIEnv *env, jobject igcls, jobject mh_jh, | |
2805 jobject target_jh, int argnum)) { | |
2806 // This is the guy we are initializing: | |
2807 if (mh_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "self is null"); } | |
2808 if (target_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "target is null"); } | |
2809 Handle mh(THREAD, JNIHandles::resolve_non_null(mh_jh)); | |
2810 Handle target(THREAD, JNIHandles::resolve_non_null(target_jh)); | |
2811 | |
2812 // Early returns out of this method leave the AMH in an unfinished state. | |
2813 assert(java_lang_invoke_MethodHandle::vmentry(mh()) == NULL, "must be safely null"); | |
2814 | |
2815 MethodHandles::init_AdapterMethodHandle(mh, target, argnum, CHECK); | |
2816 stress_method_handle_walk(mh, CHECK); | |
2817 } | |
2818 JVM_END | |
2819 | |
2820 // method type forms | |
2821 JVM_ENTRY(void, MHN_init_MT(JNIEnv *env, jobject igcls, jobject erased_jh)) { | |
2822 if (erased_jh == NULL) return; | |
2823 if (TraceMethodHandles) { | |
2824 tty->print("creating MethodType form "); | |
2825 if (WizardMode || Verbose) { // Warning: this calls Java code on the MH! | |
2826 // call Object.toString() | |
2827 Symbol* name = vmSymbols::toString_name(); | |
2828 Symbol* sig = vmSymbols::void_string_signature(); | |
2829 JavaCallArguments args(Handle(THREAD, JNIHandles::resolve_non_null(erased_jh))); | |
2830 JavaValue result(T_OBJECT); | |
2831 JavaCalls::call_virtual(&result, SystemDictionary::Object_klass(), name, sig, | |
2832 &args, CHECK); | |
2833 Handle str(THREAD, (oop)result.get_jobject()); | |
2834 java_lang_String::print(str, tty); | |
2835 } | |
2836 tty->cr(); | |
2837 } | |
2838 } | |
2839 JVM_END | |
2840 | |
2841 // debugging and reflection | |
2842 JVM_ENTRY(jobject, MHN_getTarget(JNIEnv *env, jobject igcls, jobject mh_jh, jint format)) { | |
2843 Handle mh(THREAD, JNIHandles::resolve(mh_jh)); | |
2844 if (!java_lang_invoke_MethodHandle::is_instance(mh())) { | |
2845 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException()); | |
2846 } | |
2847 oop target = MethodHandles::encode_target(mh, format, CHECK_NULL); | |
2848 return JNIHandles::make_local(THREAD, target); | |
2849 } | |
2850 JVM_END | |
2851 | |
2852 JVM_ENTRY(jint, MHN_getConstant(JNIEnv *env, jobject igcls, jint which)) { | 931 JVM_ENTRY(jint, MHN_getConstant(JNIEnv *env, jobject igcls, jint which)) { |
2853 switch (which) { | 932 switch (which) { |
2854 case MethodHandles::GC_JVM_PUSH_LIMIT: | |
2855 guarantee(MethodHandlePushLimit >= 2 && MethodHandlePushLimit <= 0xFF, | |
2856 "MethodHandlePushLimit parameter must be in valid range"); | |
2857 return MethodHandlePushLimit; | |
2858 case MethodHandles::GC_JVM_STACK_MOVE_UNIT: | |
2859 // return number of words per slot, signed according to stack direction | |
2860 return MethodHandles::stack_move_unit(); | |
2861 case MethodHandles::GC_CONV_OP_IMPLEMENTED_MASK: | |
2862 return MethodHandles::adapter_conversion_ops_supported_mask(); | |
2863 case MethodHandles::GC_COUNT_GWT: | 933 case MethodHandles::GC_COUNT_GWT: |
2864 #ifdef COMPILER2 | 934 #ifdef COMPILER2 |
2865 return true; | 935 return true; |
2866 #else | 936 #else |
2867 return false; | 937 return false; |
2870 return 0; | 940 return 0; |
2871 } | 941 } |
2872 JVM_END | 942 JVM_END |
2873 | 943 |
2874 #ifndef PRODUCT | 944 #ifndef PRODUCT |
2875 #define EACH_NAMED_CON(template) \ | 945 #define EACH_NAMED_CON(template, requirement) \ |
2876 /* hold back this one until JDK stabilizes */ \ | 946 template(MethodHandles,GC_COUNT_GWT) \ |
2877 /* template(MethodHandles,GC_JVM_PUSH_LIMIT) */ \ | |
2878 /* hold back this one until JDK stabilizes */ \ | |
2879 /* template(MethodHandles,GC_JVM_STACK_MOVE_UNIT) */ \ | |
2880 /* hold back this one until JDK stabilizes */ \ | |
2881 /* template(MethodHandles,GC_OP_ROT_ARGS_DOWN_LIMIT_BIAS) */ \ | |
2882 template(MethodHandles,ETF_HANDLE_OR_METHOD_NAME) \ | |
2883 template(MethodHandles,ETF_DIRECT_HANDLE) \ | |
2884 template(MethodHandles,ETF_METHOD_NAME) \ | |
2885 template(MethodHandles,ETF_REFLECT_METHOD) \ | |
2886 template(java_lang_invoke_MemberName,MN_IS_METHOD) \ | 947 template(java_lang_invoke_MemberName,MN_IS_METHOD) \ |
2887 template(java_lang_invoke_MemberName,MN_IS_CONSTRUCTOR) \ | 948 template(java_lang_invoke_MemberName,MN_IS_CONSTRUCTOR) \ |
2888 template(java_lang_invoke_MemberName,MN_IS_FIELD) \ | 949 template(java_lang_invoke_MemberName,MN_IS_FIELD) \ |
2889 template(java_lang_invoke_MemberName,MN_IS_TYPE) \ | 950 template(java_lang_invoke_MemberName,MN_IS_TYPE) \ |
2890 template(java_lang_invoke_MemberName,MN_SEARCH_SUPERCLASSES) \ | 951 template(java_lang_invoke_MemberName,MN_SEARCH_SUPERCLASSES) \ |
2891 template(java_lang_invoke_MemberName,MN_SEARCH_INTERFACES) \ | 952 template(java_lang_invoke_MemberName,MN_SEARCH_INTERFACES) \ |
2892 template(java_lang_invoke_MemberName,VM_INDEX_UNINITIALIZED) \ | 953 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_SHIFT) \ |
2893 template(java_lang_invoke_AdapterMethodHandle,OP_RETYPE_ONLY) \ | 954 template(java_lang_invoke_MemberName,MN_REFERENCE_KIND_MASK) \ |
2894 template(java_lang_invoke_AdapterMethodHandle,OP_RETYPE_RAW) \ | 955 template(MethodHandles,GC_LAMBDA_SUPPORT) \ |
2895 template(java_lang_invoke_AdapterMethodHandle,OP_CHECK_CAST) \ | |
2896 template(java_lang_invoke_AdapterMethodHandle,OP_PRIM_TO_PRIM) \ | |
2897 template(java_lang_invoke_AdapterMethodHandle,OP_REF_TO_PRIM) \ | |
2898 template(java_lang_invoke_AdapterMethodHandle,OP_PRIM_TO_REF) \ | |
2899 template(java_lang_invoke_AdapterMethodHandle,OP_SWAP_ARGS) \ | |
2900 template(java_lang_invoke_AdapterMethodHandle,OP_ROT_ARGS) \ | |
2901 template(java_lang_invoke_AdapterMethodHandle,OP_DUP_ARGS) \ | |
2902 template(java_lang_invoke_AdapterMethodHandle,OP_DROP_ARGS) \ | |
2903 template(java_lang_invoke_AdapterMethodHandle,OP_COLLECT_ARGS) \ | |
2904 template(java_lang_invoke_AdapterMethodHandle,OP_SPREAD_ARGS) \ | |
2905 /* hold back this one until JDK stabilizes */ \ | |
2906 /*template(java_lang_invoke_AdapterMethodHandle,CONV_OP_LIMIT)*/ \ | |
2907 template(java_lang_invoke_AdapterMethodHandle,CONV_OP_MASK) \ | |
2908 template(java_lang_invoke_AdapterMethodHandle,CONV_VMINFO_MASK) \ | |
2909 template(java_lang_invoke_AdapterMethodHandle,CONV_VMINFO_SHIFT) \ | |
2910 template(java_lang_invoke_AdapterMethodHandle,CONV_OP_SHIFT) \ | |
2911 template(java_lang_invoke_AdapterMethodHandle,CONV_DEST_TYPE_SHIFT) \ | |
2912 template(java_lang_invoke_AdapterMethodHandle,CONV_SRC_TYPE_SHIFT) \ | |
2913 template(java_lang_invoke_AdapterMethodHandle,CONV_STACK_MOVE_SHIFT) \ | |
2914 template(java_lang_invoke_AdapterMethodHandle,CONV_STACK_MOVE_MASK) \ | |
2915 /*end*/ | 956 /*end*/ |
2916 | 957 |
958 #define IGNORE_REQ(req_expr) /* req_expr */ | |
2917 #define ONE_PLUS(scope,value) 1+ | 959 #define ONE_PLUS(scope,value) 1+ |
2918 static const int con_value_count = EACH_NAMED_CON(ONE_PLUS) 0; | 960 static const int con_value_count = EACH_NAMED_CON(ONE_PLUS, IGNORE_REQ) 0; |
2919 #define VALUE_COMMA(scope,value) scope::value, | 961 #define VALUE_COMMA(scope,value) scope::value, |
2920 static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA) 0 }; | 962 static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA, IGNORE_REQ) 0 }; |
2921 #define STRING_NULL(scope,value) #value "\0" | 963 #define STRING_NULL(scope,value) #value "\0" |
2922 static const char con_names[] = { EACH_NAMED_CON(STRING_NULL) }; | 964 static const char con_names[] = { EACH_NAMED_CON(STRING_NULL, IGNORE_REQ) }; |
965 | |
966 static bool advertise_con_value(int which) { | |
967 if (which < 0) return false; | |
968 bool ok = true; | |
969 int count = 0; | |
970 #define INC_COUNT(scope,value) \ | |
971 ++count; | |
972 #define CHECK_REQ(req_expr) \ | |
973 if (which < count) return ok; \ | |
974 ok = (req_expr); | |
975 EACH_NAMED_CON(INC_COUNT, CHECK_REQ); | |
976 #undef INC_COUNT | |
977 #undef CHECK_REQ | |
978 assert(count == con_value_count, ""); | |
979 if (which < count) return ok; | |
980 return false; | |
981 } | |
2923 | 982 |
2924 #undef ONE_PLUS | 983 #undef ONE_PLUS |
2925 #undef VALUE_COMMA | 984 #undef VALUE_COMMA |
2926 #undef STRING_NULL | 985 #undef STRING_NULL |
2927 #undef EACH_NAMED_CON | 986 #undef EACH_NAMED_CON |
2928 #endif | 987 #endif // PRODUCT |
2929 | 988 |
2930 JVM_ENTRY(jint, MHN_getNamedCon(JNIEnv *env, jobject igcls, jint which, jobjectArray box_jh)) { | 989 JVM_ENTRY(jint, MHN_getNamedCon(JNIEnv *env, jobject igcls, jint which, jobjectArray box_jh)) { |
2931 #ifndef PRODUCT | 990 #ifndef PRODUCT |
2932 if (which >= 0 && which < con_value_count) { | 991 if (advertise_con_value(which)) { |
992 assert(which >= 0 && which < con_value_count, ""); | |
2933 int con = con_values[which]; | 993 int con = con_values[which]; |
2934 objArrayHandle box(THREAD, (objArrayOop) JNIHandles::resolve(box_jh)); | 994 objArrayHandle box(THREAD, (objArrayOop) JNIHandles::resolve(box_jh)); |
2935 if (box.not_null() && box->klass() == Universe::objectArrayKlassObj() && box->length() > 0) { | 995 if (box.not_null() && box->klass() == Universe::objectArrayKlassObj() && box->length() > 0) { |
2936 const char* str = &con_names[0]; | 996 const char* str = &con_names[0]; |
2937 for (int i = 0; i < which; i++) | 997 for (int i = 0; i < which; i++) |
2963 MethodHandles::expand_MemberName(mname, 0, CHECK); | 1023 MethodHandles::expand_MemberName(mname, 0, CHECK); |
2964 } | 1024 } |
2965 JVM_END | 1025 JVM_END |
2966 | 1026 |
2967 // void resolve(MemberName self, Class<?> caller) | 1027 // void resolve(MemberName self, Class<?> caller) |
2968 JVM_ENTRY(void, MHN_resolve_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jclass caller_jh)) { | 1028 JVM_ENTRY(jobject, MHN_resolve_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jclass caller_jh)) { |
2969 if (mname_jh == NULL) { THROW_MSG(vmSymbols::java_lang_InternalError(), "mname is null"); } | 1029 if (mname_jh == NULL) { THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "mname is null"); } |
2970 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); | 1030 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); |
2971 | 1031 |
2972 // The trusted Java code that calls this method should already have performed | 1032 // The trusted Java code that calls this method should already have performed |
2973 // access checks on behalf of the given caller. But, we can verify this. | 1033 // access checks on behalf of the given caller. But, we can verify this. |
2974 if (VerifyMethodHandles && caller_jh != NULL) { | 1034 if (VerifyMethodHandles && caller_jh != NULL && |
1035 java_lang_invoke_MemberName::clazz(mname()) != NULL) { | |
2975 klassOop reference_klass = java_lang_Class::as_klassOop(java_lang_invoke_MemberName::clazz(mname())); | 1036 klassOop reference_klass = java_lang_Class::as_klassOop(java_lang_invoke_MemberName::clazz(mname())); |
2976 if (reference_klass != NULL) { | 1037 if (reference_klass != NULL) { |
2977 // Emulate LinkResolver::check_klass_accessability. | 1038 // Emulate LinkResolver::check_klass_accessability. |
2978 klassOop caller = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(caller_jh)); | 1039 klassOop caller = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(caller_jh)); |
2979 if (!Reflection::verify_class_access(caller, | 1040 if (!Reflection::verify_class_access(caller, |
2980 reference_klass, | 1041 reference_klass, |
2981 true)) { | 1042 true)) { |
2982 THROW_MSG(vmSymbols::java_lang_InternalError(), Klass::cast(reference_klass)->external_name()); | 1043 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), Klass::cast(reference_klass)->external_name()); |
2983 } | 1044 } |
2984 } | 1045 } |
2985 } | 1046 } |
2986 | 1047 |
2987 MethodHandles::resolve_MemberName(mname, CHECK); | 1048 Handle resolved = MethodHandles::resolve_MemberName(mname, CHECK_NULL); |
2988 } | 1049 if (resolved.is_null()) { |
2989 JVM_END | 1050 int flags = java_lang_invoke_MemberName::flags(mname()); |
1051 int ref_kind = (flags >> REFERENCE_KIND_SHIFT) & REFERENCE_KIND_MASK; | |
1052 if (!MethodHandles::ref_kind_is_valid(ref_kind)) { | |
1053 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "obsolete MemberName format"); | |
1054 } | |
1055 if ((flags & ALL_KINDS) == IS_FIELD) { | |
1056 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), "field resolution failed"); | |
1057 } else if ((flags & ALL_KINDS) == IS_METHOD || | |
1058 (flags & ALL_KINDS) == IS_CONSTRUCTOR) { | |
1059 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchFieldError(), "method resolution failed"); | |
1060 } else { | |
1061 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "resolution failed"); | |
1062 } | |
1063 } | |
1064 | |
1065 return JNIHandles::make_local(THREAD, resolved()); | |
1066 } | |
1067 JVM_END | |
1068 | |
1069 static jlong find_member_field_offset(oop mname, bool must_be_static, TRAPS) { | |
1070 if (mname == NULL || | |
1071 java_lang_invoke_MemberName::vmtarget(mname) == NULL) { | |
1072 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "mname not resolved"); | |
1073 } else { | |
1074 int flags = java_lang_invoke_MemberName::flags(mname); | |
1075 if ((flags & IS_FIELD) != 0 && | |
1076 (must_be_static | |
1077 ? (flags & JVM_ACC_STATIC) != 0 | |
1078 : (flags & JVM_ACC_STATIC) == 0)) { | |
1079 int vmindex = java_lang_invoke_MemberName::vmindex(mname); | |
1080 return (jlong) vmindex; | |
1081 } | |
1082 } | |
1083 const char* msg = (must_be_static ? "static field required" : "non-static field required"); | |
1084 THROW_MSG_0(vmSymbols::java_lang_InternalError(), msg); | |
1085 return 0; | |
1086 } | |
1087 | |
1088 JVM_ENTRY(jlong, MHN_objectFieldOffset(JNIEnv *env, jobject igcls, jobject mname_jh)) { | |
1089 return find_member_field_offset(JNIHandles::resolve(mname_jh), false, THREAD); | |
1090 } | |
1091 JVM_END | |
1092 | |
1093 JVM_ENTRY(jlong, MHN_staticFieldOffset(JNIEnv *env, jobject igcls, jobject mname_jh)) { | |
1094 return find_member_field_offset(JNIHandles::resolve(mname_jh), true, THREAD); | |
1095 } | |
1096 JVM_END | |
1097 | |
1098 JVM_ENTRY(jobject, MHN_staticFieldBase(JNIEnv *env, jobject igcls, jobject mname_jh)) { | |
1099 // use the other function to perform sanity checks: | |
1100 jlong ignore = find_member_field_offset(JNIHandles::resolve(mname_jh), true, CHECK_NULL); | |
1101 oop clazz = java_lang_invoke_MemberName::clazz(JNIHandles::resolve_non_null(mname_jh)); | |
1102 return JNIHandles::make_local(THREAD, clazz); | |
1103 } | |
1104 JVM_END | |
1105 | |
1106 JVM_ENTRY(jobject, MHN_getMemberVMInfo(JNIEnv *env, jobject igcls, jobject mname_jh)) { | |
1107 if (mname_jh == NULL) return NULL; | |
1108 Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh)); | |
1109 intptr_t vmindex = java_lang_invoke_MemberName::vmindex(mname()); | |
1110 Handle vmtarget = java_lang_invoke_MemberName::vmtarget(mname()); | |
1111 objArrayHandle result = oopFactory::new_objArray(SystemDictionary::Object_klass(), 2, CHECK_NULL); | |
1112 jvalue vmindex_value; vmindex_value.j = (long)vmindex; | |
1113 oop x = java_lang_boxing_object::create(T_LONG, &vmindex_value, CHECK_NULL); | |
1114 result->obj_at_put(0, x); | |
1115 x = NULL; | |
1116 if (vmtarget.is_null() || vmtarget->is_instance()) { | |
1117 x = vmtarget(); | |
1118 } else if (vmtarget->is_klass()) { | |
1119 x = Klass::cast((klassOop) vmtarget())->java_mirror(); | |
1120 } else { | |
1121 Handle mname2 = MethodHandles::new_MemberName(CHECK_NULL); | |
1122 if (vmtarget->is_method()) | |
1123 x = MethodHandles::init_method_MemberName(mname2(), methodOop(vmtarget()), false, NULL); | |
1124 else | |
1125 x = MethodHandles::init_MemberName(mname2(), vmtarget()); | |
1126 } | |
1127 result->obj_at_put(1, x); | |
1128 return JNIHandles::make_local(env, result()); | |
1129 } | |
1130 JVM_END | |
1131 | |
1132 | |
2990 | 1133 |
2991 // static native int getMembers(Class<?> defc, String matchName, String matchSig, | 1134 // static native int getMembers(Class<?> defc, String matchName, String matchSig, |
2992 // int matchFlags, Class<?> caller, int skip, MemberName[] results); | 1135 // int matchFlags, Class<?> caller, int skip, MemberName[] results); |
2993 JVM_ENTRY(jint, MHN_getMembers(JNIEnv *env, jobject igcls, | 1136 JVM_ENTRY(jint, MHN_getMembers(JNIEnv *env, jobject igcls, |
2994 jclass clazz_jh, jstring name_jh, jstring sig_jh, | 1137 jclass clazz_jh, jstring name_jh, jstring sig_jh, |
3051 } | 1194 } |
3052 java_lang_invoke_CallSite::set_target_volatile(call_site(), target()); | 1195 java_lang_invoke_CallSite::set_target_volatile(call_site(), target()); |
3053 } | 1196 } |
3054 JVM_END | 1197 JVM_END |
3055 | 1198 |
3056 methodOop MethodHandles::resolve_raise_exception_method(TRAPS) { | |
3057 if (_raise_exception_method != NULL) { | |
3058 // no need to do it twice | |
3059 return raise_exception_method(); | |
3060 } | |
3061 // LinkResolver::resolve_invokedynamic can reach this point | |
3062 // because an invokedynamic has failed very early (7049415) | |
3063 KlassHandle MHN_klass = SystemDictionaryHandles::MethodHandleNatives_klass(); | |
3064 if (MHN_klass.not_null()) { | |
3065 TempNewSymbol raiseException_name = SymbolTable::new_symbol("raiseException", CHECK_NULL); | |
3066 TempNewSymbol raiseException_sig = SymbolTable::new_symbol("(ILjava/lang/Object;Ljava/lang/Object;)V", CHECK_NULL); | |
3067 methodOop raiseException_method = instanceKlass::cast(MHN_klass->as_klassOop()) | |
3068 ->find_method(raiseException_name, raiseException_sig); | |
3069 if (raiseException_method != NULL && raiseException_method->is_static()) { | |
3070 return raiseException_method; | |
3071 } | |
3072 } | |
3073 // not found; let the caller deal with it | |
3074 return NULL; | |
3075 } | |
3076 void MethodHandles::raise_exception(int code, oop actual, oop required, TRAPS) { | |
3077 methodOop raiseException_method = resolve_raise_exception_method(CHECK); | |
3078 if (raiseException_method != NULL && | |
3079 instanceKlass::cast(raiseException_method->method_holder())->is_not_initialized()) { | |
3080 instanceKlass::cast(raiseException_method->method_holder())->initialize(CHECK); | |
3081 // it had better be resolved by now, or maybe JSR 292 failed to load | |
3082 raiseException_method = raise_exception_method(); | |
3083 } | |
3084 if (raiseException_method == NULL) { | |
3085 THROW_MSG(vmSymbols::java_lang_InternalError(), "no raiseException method"); | |
3086 } | |
3087 JavaCallArguments args; | |
3088 args.push_int(code); | |
3089 args.push_oop(actual); | |
3090 args.push_oop(required); | |
3091 JavaValue result(T_VOID); | |
3092 JavaCalls::call(&result, raiseException_method, &args, CHECK); | |
3093 } | |
3094 | |
3095 JVM_ENTRY(jobject, MH_invoke_UOE(JNIEnv *env, jobject igmh, jobjectArray igargs)) { | 1199 JVM_ENTRY(jobject, MH_invoke_UOE(JNIEnv *env, jobject igmh, jobjectArray igargs)) { |
3096 TempNewSymbol UOE_name = SymbolTable::new_symbol("java/lang/UnsupportedOperationException", CHECK_NULL); | 1200 TempNewSymbol UOE_name = SymbolTable::new_symbol("java/lang/UnsupportedOperationException", CHECK_NULL); |
3097 THROW_MSG_NULL(UOE_name, "MethodHandle.invoke cannot be invoked reflectively"); | 1201 THROW_MSG_NULL(UOE_name, "MethodHandle.invoke cannot be invoked reflectively"); |
3098 return NULL; | 1202 return NULL; |
3099 } | 1203 } |
3119 #define STRG LANG"String;" | 1223 #define STRG LANG"String;" |
3120 #define CS JLINV"CallSite;" | 1224 #define CS JLINV"CallSite;" |
3121 #define MT JLINV"MethodType;" | 1225 #define MT JLINV"MethodType;" |
3122 #define MH JLINV"MethodHandle;" | 1226 #define MH JLINV"MethodHandle;" |
3123 #define MEM JLINV"MemberName;" | 1227 #define MEM JLINV"MemberName;" |
3124 #define AMH JLINV"AdapterMethodHandle;" | |
3125 #define BMH JLINV"BoundMethodHandle;" | |
3126 #define DMH JLINV"DirectMethodHandle;" | |
3127 | 1228 |
3128 #define CC (char*) /*cast a literal from (const char*)*/ | 1229 #define CC (char*) /*cast a literal from (const char*)*/ |
3129 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | 1230 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) |
3130 | 1231 |
3131 // These are the native methods on java.lang.invoke.MethodHandleNatives. | 1232 // These are the native methods on java.lang.invoke.MethodHandleNatives. |
3132 static JNINativeMethod methods[] = { | 1233 static JNINativeMethod required_methods_JDK8[] = { |
3133 // void init(MemberName self, AccessibleObject ref) | |
3134 {CC"init", CC"("AMH""MH"I)V", FN_PTR(MHN_init_AMH)}, | |
3135 {CC"init", CC"("BMH""OBJ"I)V", FN_PTR(MHN_init_BMH)}, | |
3136 {CC"init", CC"("DMH""OBJ"Z"CLS")V", FN_PTR(MHN_init_DMH)}, | |
3137 {CC"init", CC"("MT")V", FN_PTR(MHN_init_MT)}, | |
3138 {CC"init", CC"("MEM""OBJ")V", FN_PTR(MHN_init_Mem)}, | 1234 {CC"init", CC"("MEM""OBJ")V", FN_PTR(MHN_init_Mem)}, |
3139 {CC"expand", CC"("MEM")V", FN_PTR(MHN_expand_Mem)}, | 1235 {CC"expand", CC"("MEM")V", FN_PTR(MHN_expand_Mem)}, |
3140 {CC"resolve", CC"("MEM""CLS")V", FN_PTR(MHN_resolve_Mem)}, | 1236 {CC"resolve", CC"("MEM""CLS")"MEM, FN_PTR(MHN_resolve_Mem)}, |
3141 {CC"getTarget", CC"("MH"I)"OBJ, FN_PTR(MHN_getTarget)}, | |
3142 {CC"getConstant", CC"(I)I", FN_PTR(MHN_getConstant)}, | 1237 {CC"getConstant", CC"(I)I", FN_PTR(MHN_getConstant)}, |
3143 // static native int getNamedCon(int which, Object[] name) | 1238 // static native int getNamedCon(int which, Object[] name) |
3144 {CC"getNamedCon", CC"(I["OBJ")I", FN_PTR(MHN_getNamedCon)}, | 1239 {CC"getNamedCon", CC"(I["OBJ")I", FN_PTR(MHN_getNamedCon)}, |
3145 // static native int getMembers(Class<?> defc, String matchName, String matchSig, | 1240 // static native int getMembers(Class<?> defc, String matchName, String matchSig, |
3146 // int matchFlags, Class<?> caller, int skip, MemberName[] results); | 1241 // int matchFlags, Class<?> caller, int skip, MemberName[] results); |
3147 {CC"getMembers", CC"("CLS""STRG""STRG"I"CLS"I["MEM")I", FN_PTR(MHN_getMembers)} | 1242 {CC"getMembers", CC"("CLS""STRG""STRG"I"CLS"I["MEM")I", FN_PTR(MHN_getMembers)}, |
1243 {CC"objectFieldOffset", CC"("MEM")J", FN_PTR(MHN_objectFieldOffset)}, | |
1244 {CC"setCallSiteTargetNormal", CC"("CS""MH")V", FN_PTR(MHN_setCallSiteTargetNormal)}, | |
1245 {CC"setCallSiteTargetVolatile", CC"("CS""MH")V", FN_PTR(MHN_setCallSiteTargetVolatile)}, | |
1246 {CC"staticFieldOffset", CC"("MEM")J", FN_PTR(MHN_staticFieldOffset)}, | |
1247 {CC"staticFieldBase", CC"("MEM")"OBJ, FN_PTR(MHN_staticFieldBase)}, | |
1248 {CC"getMemberVMInfo", CC"("MEM")"OBJ, FN_PTR(MHN_getMemberVMInfo)} | |
3148 }; | 1249 }; |
3149 | 1250 |
3150 static JNINativeMethod call_site_methods[] = { | |
3151 {CC"setCallSiteTargetNormal", CC"("CS""MH")V", FN_PTR(MHN_setCallSiteTargetNormal)}, | |
3152 {CC"setCallSiteTargetVolatile", CC"("CS""MH")V", FN_PTR(MHN_setCallSiteTargetVolatile)} | |
3153 }; | |
3154 | |
3155 static JNINativeMethod invoke_methods[] = { | 1251 static JNINativeMethod invoke_methods[] = { |
3156 // void init(MemberName self, AccessibleObject ref) | |
3157 {CC"invoke", CC"(["OBJ")"OBJ, FN_PTR(MH_invoke_UOE)}, | 1252 {CC"invoke", CC"(["OBJ")"OBJ, FN_PTR(MH_invoke_UOE)}, |
3158 {CC"invokeExact", CC"(["OBJ")"OBJ, FN_PTR(MH_invokeExact_UOE)} | 1253 {CC"invokeExact", CC"(["OBJ")"OBJ, FN_PTR(MH_invokeExact_UOE)} |
3159 }; | 1254 }; |
3160 | 1255 |
3161 // This one function is exported, used by NativeLookup. | 1256 // This one function is exported, used by NativeLookup. |
3162 | 1257 |
3163 JVM_ENTRY(void, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class)) { | 1258 JVM_ENTRY(void, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class)) { |
3164 assert(MethodHandles::spot_check_entry_names(), "entry enum is OK"); | |
3165 | |
3166 if (!EnableInvokeDynamic) { | 1259 if (!EnableInvokeDynamic) { |
3167 warning("JSR 292 is disabled in this JVM. Use -XX:+UnlockDiagnosticVMOptions -XX:+EnableInvokeDynamic to enable."); | 1260 warning("JSR 292 is disabled in this JVM. Use -XX:+UnlockDiagnosticVMOptions -XX:+EnableInvokeDynamic to enable."); |
3168 return; // bind nothing | 1261 return; // bind nothing |
3169 } | 1262 } |
3170 | 1263 |
3171 assert(!MethodHandles::enabled(), "must not be enabled"); | 1264 assert(!MethodHandles::enabled(), "must not be enabled"); |
3172 bool enable_MH = true; | 1265 bool enable_MH = true; |
3173 | 1266 |
3174 { | 1267 jclass MH_class = NULL; |
1268 if (SystemDictionary::MethodHandle_klass() == NULL) { | |
1269 enable_MH = false; | |
1270 } else { | |
1271 oop mirror = Klass::cast(SystemDictionary::MethodHandle_klass())->java_mirror(); | |
1272 MH_class = (jclass) JNIHandles::make_local(env, mirror); | |
1273 } | |
1274 | |
1275 int status; | |
1276 | |
1277 if (enable_MH) { | |
3175 ThreadToNativeFromVM ttnfv(thread); | 1278 ThreadToNativeFromVM ttnfv(thread); |
3176 int status = env->RegisterNatives(MHN_class, methods, sizeof(methods)/sizeof(JNINativeMethod)); | 1279 |
3177 if (!env->ExceptionOccurred()) { | 1280 status = env->RegisterNatives(MHN_class, required_methods_JDK8, sizeof(required_methods_JDK8)/sizeof(JNINativeMethod)); |
3178 const char* L_MH_name = (JLINV "MethodHandle"); | 1281 if (status == JNI_OK && !env->ExceptionOccurred()) { |
3179 const char* MH_name = L_MH_name+1; | |
3180 jclass MH_class = env->FindClass(MH_name); | |
3181 status = env->RegisterNatives(MH_class, invoke_methods, sizeof(invoke_methods)/sizeof(JNINativeMethod)); | 1282 status = env->RegisterNatives(MH_class, invoke_methods, sizeof(invoke_methods)/sizeof(JNINativeMethod)); |
3182 } | 1283 } |
3183 if (!env->ExceptionOccurred()) { | 1284 if (status != JNI_OK || env->ExceptionOccurred()) { |
3184 status = env->RegisterNatives(MHN_class, call_site_methods, sizeof(call_site_methods)/sizeof(JNINativeMethod)); | |
3185 } | |
3186 if (env->ExceptionOccurred()) { | |
3187 warning("JSR 292 method handle code is mismatched to this JVM. Disabling support."); | 1285 warning("JSR 292 method handle code is mismatched to this JVM. Disabling support."); |
3188 enable_MH = false; | 1286 enable_MH = false; |
3189 env->ExceptionClear(); | 1287 env->ExceptionClear(); |
3190 } | 1288 } |
3191 | 1289 } |
3192 } | 1290 |
3193 | 1291 if (TraceInvokeDynamic) { |
3194 if (enable_MH) { | 1292 tty->print_cr("MethodHandle support loaded (using LambdaForms)"); |
3195 methodOop raiseException_method = MethodHandles::resolve_raise_exception_method(CHECK); | |
3196 if (raiseException_method != NULL) { | |
3197 MethodHandles::set_raise_exception_method(raiseException_method); | |
3198 } else { | |
3199 warning("JSR 292 method handle code is mismatched to this JVM. Disabling support."); | |
3200 enable_MH = false; | |
3201 } | |
3202 } | 1293 } |
3203 | 1294 |
3204 if (enable_MH) { | 1295 if (enable_MH) { |
3205 MethodHandles::generate_adapters(); | 1296 MethodHandles::generate_adapters(); |
3206 MethodHandles::set_enabled(true); | 1297 MethodHandles::set_enabled(true); |