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comparison src/share/vm/prims/methodHandles.hpp @ 6266:1d7922586cf6

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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
date Tue, 24 Jul 2012 10:51:00 -0700
parents 15d394228cfa
children da91efe96a93
comparison
equal deleted inserted replaced
6241:aba91a731143 6266:1d7922586cf6
31 #include "runtime/globals.hpp" 31 #include "runtime/globals.hpp"
32 #include "runtime/interfaceSupport.hpp" 32 #include "runtime/interfaceSupport.hpp"
33 33
34 class MacroAssembler; 34 class MacroAssembler;
35 class Label; 35 class Label;
36 class MethodHandleEntry;
37 36
38 class MethodHandles: AllStatic { 37 class MethodHandles: AllStatic {
39 // JVM support for MethodHandle, MethodType, and related types 38 // JVM support for MethodHandle, MethodType, and related types
40 // in java.lang.invoke and sun.invoke. 39 // in java.lang.invoke and sun.invoke.
41 // See also javaClasses for layouts java_lang_invoke_Method{Handle,Type,Type::Form}. 40 // See also javaClasses for layouts java_lang_invoke_Method{Handle,Type,Type::Form}.
42 public: 41 public:
43 enum EntryKind {
44 _raise_exception, // stub for error generation from other stubs
45 _invokestatic_mh, // how a MH emulates invokestatic
46 _invokespecial_mh, // ditto for the other invokes...
47 _invokevirtual_mh,
48 _invokeinterface_mh,
49 _bound_ref_mh, // reference argument is bound
50 _bound_int_mh, // int argument is bound (via an Integer or Float)
51 _bound_long_mh, // long argument is bound (via a Long or Double)
52 _bound_ref_direct_mh, // same as above, with direct linkage to methodOop
53 _bound_int_direct_mh,
54 _bound_long_direct_mh,
55
56 _adapter_mh_first, // adapter sequence goes here...
57 _adapter_retype_only = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_RETYPE_ONLY,
58 _adapter_retype_raw = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW,
59 _adapter_check_cast = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_CHECK_CAST,
60 _adapter_prim_to_prim = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_PRIM,
61 _adapter_ref_to_prim = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_REF_TO_PRIM,
62 _adapter_prim_to_ref = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF,
63 _adapter_swap_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS,
64 _adapter_rot_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS,
65 _adapter_dup_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS,
66 _adapter_drop_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS,
67 _adapter_collect_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS,
68 _adapter_spread_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS,
69 _adapter_fold_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS,
70 _adapter_unused_13 = _adapter_mh_first + 13, //hole in the CONV_OP enumeration
71 _adapter_mh_last = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::CONV_OP_LIMIT - 1,
72
73 // Optimized adapter types
74
75 // argument list reordering
76 _adapter_opt_swap_1,
77 _adapter_opt_swap_2,
78 _adapter_opt_rot_1_up,
79 _adapter_opt_rot_1_down,
80 _adapter_opt_rot_2_up,
81 _adapter_opt_rot_2_down,
82 // primitive single to single:
83 _adapter_opt_i2i, // i2c, i2z, i2b, i2s
84 // primitive double to single:
85 _adapter_opt_l2i,
86 _adapter_opt_d2f,
87 // primitive single to double:
88 _adapter_opt_i2l,
89 _adapter_opt_f2d,
90 // conversion between floating point and integer type is handled by Java
91
92 // reference to primitive:
93 _adapter_opt_unboxi,
94 _adapter_opt_unboxl,
95
96 // %% Maybe tame the following with a VM_SYMBOLS_DO type macro?
97
98 // how a blocking adapter returns (platform-dependent)
99 _adapter_opt_return_ref,
100 _adapter_opt_return_int,
101 _adapter_opt_return_long,
102 _adapter_opt_return_float,
103 _adapter_opt_return_double,
104 _adapter_opt_return_void,
105 _adapter_opt_return_S0_ref, // return ref to S=0 (last slot)
106 _adapter_opt_return_S1_ref, // return ref to S=1 (2nd-to-last slot)
107 _adapter_opt_return_S2_ref,
108 _adapter_opt_return_S3_ref,
109 _adapter_opt_return_S4_ref,
110 _adapter_opt_return_S5_ref,
111 _adapter_opt_return_any, // dynamically select r/i/l/f/d
112 _adapter_opt_return_FIRST = _adapter_opt_return_ref,
113 _adapter_opt_return_LAST = _adapter_opt_return_any,
114
115 // spreading (array length cases 0, 1, ...)
116 _adapter_opt_spread_0, // spread empty array to N=0 arguments
117 _adapter_opt_spread_1_ref, // spread Object[] to N=1 argument
118 _adapter_opt_spread_2_ref, // spread Object[] to N=2 arguments
119 _adapter_opt_spread_3_ref, // spread Object[] to N=3 arguments
120 _adapter_opt_spread_4_ref, // spread Object[] to N=4 arguments
121 _adapter_opt_spread_5_ref, // spread Object[] to N=5 arguments
122 _adapter_opt_spread_ref, // spread Object[] to N arguments
123 _adapter_opt_spread_byte, // spread byte[] or boolean[] to N arguments
124 _adapter_opt_spread_char, // spread char[], etc., to N arguments
125 _adapter_opt_spread_short, // spread short[], etc., to N arguments
126 _adapter_opt_spread_int, // spread int[], short[], etc., to N arguments
127 _adapter_opt_spread_long, // spread long[] to N arguments
128 _adapter_opt_spread_float, // spread float[] to N arguments
129 _adapter_opt_spread_double, // spread double[] to N arguments
130 _adapter_opt_spread_FIRST = _adapter_opt_spread_0,
131 _adapter_opt_spread_LAST = _adapter_opt_spread_double,
132
133 // blocking filter/collect conversions
134 // These collect N arguments and replace them (at slot S) by a return value
135 // which is passed to the final target, along with the unaffected arguments.
136 // collect_{N}_{T} collects N arguments at any position into a T value
137 // collect_{N}_S{S}_{T} collects N arguments at slot S into a T value
138 // collect_{T} collects any number of arguments at any position
139 // filter_S{S}_{T} is the same as collect_1_S{S}_{T} (a unary collection)
140 // (collect_2 is also usable as a filter, with long or double arguments)
141 _adapter_opt_collect_ref, // combine N arguments, replace with a reference
142 _adapter_opt_collect_int, // combine N arguments, replace with an int, short, etc.
143 _adapter_opt_collect_long, // combine N arguments, replace with a long
144 _adapter_opt_collect_float, // combine N arguments, replace with a float
145 _adapter_opt_collect_double, // combine N arguments, replace with a double
146 _adapter_opt_collect_void, // combine N arguments, replace with nothing
147 // if there is a small fixed number to push, do so without a loop:
148 _adapter_opt_collect_0_ref, // collect N=0 arguments, insert a reference
149 _adapter_opt_collect_1_ref, // collect N=1 argument, replace with a reference
150 _adapter_opt_collect_2_ref, // combine N=2 arguments, replace with a reference
151 _adapter_opt_collect_3_ref, // combine N=3 arguments, replace with a reference
152 _adapter_opt_collect_4_ref, // combine N=4 arguments, replace with a reference
153 _adapter_opt_collect_5_ref, // combine N=5 arguments, replace with a reference
154 // filters are an important special case because they never move arguments:
155 _adapter_opt_filter_S0_ref, // filter N=1 argument at S=0, replace with a reference
156 _adapter_opt_filter_S1_ref, // filter N=1 argument at S=1, replace with a reference
157 _adapter_opt_filter_S2_ref, // filter N=1 argument at S=2, replace with a reference
158 _adapter_opt_filter_S3_ref, // filter N=1 argument at S=3, replace with a reference
159 _adapter_opt_filter_S4_ref, // filter N=1 argument at S=4, replace with a reference
160 _adapter_opt_filter_S5_ref, // filter N=1 argument at S=5, replace with a reference
161 // these move arguments, but they are important for boxing
162 _adapter_opt_collect_2_S0_ref, // combine last N=2 arguments, replace with a reference
163 _adapter_opt_collect_2_S1_ref, // combine N=2 arguments at S=1, replace with a reference
164 _adapter_opt_collect_2_S2_ref, // combine N=2 arguments at S=2, replace with a reference
165 _adapter_opt_collect_2_S3_ref, // combine N=2 arguments at S=3, replace with a reference
166 _adapter_opt_collect_2_S4_ref, // combine N=2 arguments at S=4, replace with a reference
167 _adapter_opt_collect_2_S5_ref, // combine N=2 arguments at S=5, replace with a reference
168 _adapter_opt_collect_FIRST = _adapter_opt_collect_ref,
169 _adapter_opt_collect_LAST = _adapter_opt_collect_2_S5_ref,
170
171 // blocking folding conversions
172 // these are like collects, but retain all the N arguments for the final target
173 //_adapter_opt_fold_0_ref, // same as _adapter_opt_collect_0_ref
174 // fold_{N}_{T} processes N arguments at any position into a T value, which it inserts
175 // fold_{T} processes any number of arguments at any position
176 _adapter_opt_fold_ref, // process N arguments, prepend a reference
177 _adapter_opt_fold_int, // process N arguments, prepend an int, short, etc.
178 _adapter_opt_fold_long, // process N arguments, prepend a long
179 _adapter_opt_fold_float, // process N arguments, prepend a float
180 _adapter_opt_fold_double, // process N arguments, prepend a double
181 _adapter_opt_fold_void, // process N arguments, but leave the list unchanged
182 _adapter_opt_fold_1_ref, // process N=1 argument, prepend a reference
183 _adapter_opt_fold_2_ref, // process N=2 arguments, prepend a reference
184 _adapter_opt_fold_3_ref, // process N=3 arguments, prepend a reference
185 _adapter_opt_fold_4_ref, // process N=4 arguments, prepend a reference
186 _adapter_opt_fold_5_ref, // process N=5 arguments, prepend a reference
187 _adapter_opt_fold_FIRST = _adapter_opt_fold_ref,
188 _adapter_opt_fold_LAST = _adapter_opt_fold_5_ref,
189
190 _adapter_opt_profiling,
191
192 _EK_LIMIT,
193 _EK_FIRST = 0
194 };
195
196 public: 42 public:
197 static bool enabled() { return _enabled; } 43 static bool enabled() { return _enabled; }
198 static void set_enabled(bool z); 44 static void set_enabled(bool z);
199 45
200 private: 46 private:
201 enum { // import java_lang_invoke_AdapterMethodHandle::CONV_OP_*
202 CONV_OP_LIMIT = java_lang_invoke_AdapterMethodHandle::CONV_OP_LIMIT,
203 CONV_OP_MASK = java_lang_invoke_AdapterMethodHandle::CONV_OP_MASK,
204 CONV_TYPE_MASK = java_lang_invoke_AdapterMethodHandle::CONV_TYPE_MASK,
205 CONV_VMINFO_MASK = java_lang_invoke_AdapterMethodHandle::CONV_VMINFO_MASK,
206 CONV_VMINFO_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_VMINFO_SHIFT,
207 CONV_OP_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_OP_SHIFT,
208 CONV_DEST_TYPE_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_DEST_TYPE_SHIFT,
209 CONV_SRC_TYPE_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_SRC_TYPE_SHIFT,
210 CONV_STACK_MOVE_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_STACK_MOVE_SHIFT,
211 CONV_STACK_MOVE_MASK = java_lang_invoke_AdapterMethodHandle::CONV_STACK_MOVE_MASK
212 };
213
214 static bool _enabled; 47 static bool _enabled;
215 static MethodHandleEntry* _entries[_EK_LIMIT];
216 static const char* _entry_names[_EK_LIMIT+1];
217 static jobject _raise_exception_method;
218 static address _adapter_return_handlers[CONV_TYPE_MASK+1];
219 48
220 // Adapters. 49 // Adapters.
221 static MethodHandlesAdapterBlob* _adapter_code; 50 static MethodHandlesAdapterBlob* _adapter_code;
222 51
223 static bool ek_valid(EntryKind ek) { return (uint)ek < (uint)_EK_LIMIT; }
224 static bool conv_op_valid(int op) { return (uint)op < (uint)CONV_OP_LIMIT; }
225
226 public:
227 static bool have_entry(EntryKind ek) { return ek_valid(ek) && _entries[ek] != NULL; }
228 static MethodHandleEntry* entry(EntryKind ek) { assert(ek_valid(ek), "initialized");
229 return _entries[ek]; }
230 static const char* entry_name(EntryKind ek) { assert(ek_valid(ek), "oob");
231 return _entry_names[ek]; }
232 static EntryKind adapter_entry_kind(int op) { assert(conv_op_valid(op), "oob");
233 return EntryKind(_adapter_mh_first + op); }
234
235 static void init_entry(EntryKind ek, MethodHandleEntry* me) {
236 assert(ek_valid(ek), "oob");
237 assert(_entries[ek] == NULL, "no double initialization");
238 _entries[ek] = me;
239 }
240
241 // Some adapter helper functions.
242 static EntryKind ek_original_kind(EntryKind ek) {
243 if (ek <= _adapter_mh_last) return ek;
244 switch (ek) {
245 case _adapter_opt_swap_1:
246 case _adapter_opt_swap_2:
247 return _adapter_swap_args;
248 case _adapter_opt_rot_1_up:
249 case _adapter_opt_rot_1_down:
250 case _adapter_opt_rot_2_up:
251 case _adapter_opt_rot_2_down:
252 return _adapter_rot_args;
253 case _adapter_opt_i2i:
254 case _adapter_opt_l2i:
255 case _adapter_opt_d2f:
256 case _adapter_opt_i2l:
257 case _adapter_opt_f2d:
258 return _adapter_prim_to_prim;
259 case _adapter_opt_unboxi:
260 case _adapter_opt_unboxl:
261 return _adapter_ref_to_prim;
262 }
263 if (ek >= _adapter_opt_spread_FIRST && ek <= _adapter_opt_spread_LAST)
264 return _adapter_spread_args;
265 if (ek >= _adapter_opt_collect_FIRST && ek <= _adapter_opt_collect_LAST)
266 return _adapter_collect_args;
267 if (ek >= _adapter_opt_fold_FIRST && ek <= _adapter_opt_fold_LAST)
268 return _adapter_fold_args;
269 if (ek >= _adapter_opt_return_FIRST && ek <= _adapter_opt_return_LAST)
270 return _adapter_opt_return_any;
271 if (ek == _adapter_opt_profiling)
272 return _adapter_retype_only;
273 assert(false, "oob");
274 return _EK_LIMIT;
275 }
276
277 static bool ek_supported(MethodHandles::EntryKind ek);
278
279 static BasicType ek_bound_mh_arg_type(EntryKind ek) {
280 switch (ek) {
281 case _bound_int_mh : // fall-thru
282 case _bound_int_direct_mh : return T_INT;
283 case _bound_long_mh : // fall-thru
284 case _bound_long_direct_mh : return T_LONG;
285 default : return T_OBJECT;
286 }
287 }
288
289 static int ek_adapter_opt_swap_slots(EntryKind ek) {
290 switch (ek) {
291 case _adapter_opt_swap_1 : return 1;
292 case _adapter_opt_swap_2 : return 2;
293 case _adapter_opt_rot_1_up : return 1;
294 case _adapter_opt_rot_1_down : return 1;
295 case _adapter_opt_rot_2_up : return 2;
296 case _adapter_opt_rot_2_down : return 2;
297 default : ShouldNotReachHere(); return -1;
298 }
299 }
300
301 static int ek_adapter_opt_swap_mode(EntryKind ek) {
302 switch (ek) {
303 case _adapter_opt_swap_1 : return 0;
304 case _adapter_opt_swap_2 : return 0;
305 case _adapter_opt_rot_1_up : return 1;
306 case _adapter_opt_rot_1_down : return -1;
307 case _adapter_opt_rot_2_up : return 1;
308 case _adapter_opt_rot_2_down : return -1;
309 default : ShouldNotReachHere(); return 0;
310 }
311 }
312
313 static int ek_adapter_opt_collect_count(EntryKind ek) {
314 assert(ek >= _adapter_opt_collect_FIRST && ek <= _adapter_opt_collect_LAST ||
315 ek >= _adapter_opt_fold_FIRST && ek <= _adapter_opt_fold_LAST, "");
316 switch (ek) {
317 case _adapter_opt_collect_0_ref : return 0;
318 case _adapter_opt_filter_S0_ref :
319 case _adapter_opt_filter_S1_ref :
320 case _adapter_opt_filter_S2_ref :
321 case _adapter_opt_filter_S3_ref :
322 case _adapter_opt_filter_S4_ref :
323 case _adapter_opt_filter_S5_ref :
324 case _adapter_opt_fold_1_ref :
325 case _adapter_opt_collect_1_ref : return 1;
326 case _adapter_opt_collect_2_S0_ref :
327 case _adapter_opt_collect_2_S1_ref :
328 case _adapter_opt_collect_2_S2_ref :
329 case _adapter_opt_collect_2_S3_ref :
330 case _adapter_opt_collect_2_S4_ref :
331 case _adapter_opt_collect_2_S5_ref :
332 case _adapter_opt_fold_2_ref :
333 case _adapter_opt_collect_2_ref : return 2;
334 case _adapter_opt_fold_3_ref :
335 case _adapter_opt_collect_3_ref : return 3;
336 case _adapter_opt_fold_4_ref :
337 case _adapter_opt_collect_4_ref : return 4;
338 case _adapter_opt_fold_5_ref :
339 case _adapter_opt_collect_5_ref : return 5;
340 default : return -1; // sentinel value for "variable"
341 }
342 }
343
344 static int ek_adapter_opt_collect_slot(EntryKind ek) {
345 assert(ek >= _adapter_opt_collect_FIRST && ek <= _adapter_opt_collect_LAST ||
346 ek >= _adapter_opt_fold_FIRST && ek <= _adapter_opt_fold_LAST, "");
347 switch (ek) {
348 case _adapter_opt_collect_2_S0_ref :
349 case _adapter_opt_filter_S0_ref : return 0;
350 case _adapter_opt_collect_2_S1_ref :
351 case _adapter_opt_filter_S1_ref : return 1;
352 case _adapter_opt_collect_2_S2_ref :
353 case _adapter_opt_filter_S2_ref : return 2;
354 case _adapter_opt_collect_2_S3_ref :
355 case _adapter_opt_filter_S3_ref : return 3;
356 case _adapter_opt_collect_2_S4_ref :
357 case _adapter_opt_filter_S4_ref : return 4;
358 case _adapter_opt_collect_2_S5_ref :
359 case _adapter_opt_filter_S5_ref : return 5;
360 default : return -1; // sentinel value for "variable"
361 }
362 }
363
364 static BasicType ek_adapter_opt_collect_type(EntryKind ek) {
365 assert(ek >= _adapter_opt_collect_FIRST && ek <= _adapter_opt_collect_LAST ||
366 ek >= _adapter_opt_fold_FIRST && ek <= _adapter_opt_fold_LAST, "");
367 switch (ek) {
368 case _adapter_opt_fold_int :
369 case _adapter_opt_collect_int : return T_INT;
370 case _adapter_opt_fold_long :
371 case _adapter_opt_collect_long : return T_LONG;
372 case _adapter_opt_fold_float :
373 case _adapter_opt_collect_float : return T_FLOAT;
374 case _adapter_opt_fold_double :
375 case _adapter_opt_collect_double : return T_DOUBLE;
376 case _adapter_opt_fold_void :
377 case _adapter_opt_collect_void : return T_VOID;
378 default : return T_OBJECT;
379 }
380 }
381
382 static int ek_adapter_opt_return_slot(EntryKind ek) {
383 assert(ek >= _adapter_opt_return_FIRST && ek <= _adapter_opt_return_LAST, "");
384 switch (ek) {
385 case _adapter_opt_return_S0_ref : return 0;
386 case _adapter_opt_return_S1_ref : return 1;
387 case _adapter_opt_return_S2_ref : return 2;
388 case _adapter_opt_return_S3_ref : return 3;
389 case _adapter_opt_return_S4_ref : return 4;
390 case _adapter_opt_return_S5_ref : return 5;
391 default : return -1; // sentinel value for "variable"
392 }
393 }
394
395 static BasicType ek_adapter_opt_return_type(EntryKind ek) {
396 assert(ek >= _adapter_opt_return_FIRST && ek <= _adapter_opt_return_LAST, "");
397 switch (ek) {
398 case _adapter_opt_return_int : return T_INT;
399 case _adapter_opt_return_long : return T_LONG;
400 case _adapter_opt_return_float : return T_FLOAT;
401 case _adapter_opt_return_double : return T_DOUBLE;
402 case _adapter_opt_return_void : return T_VOID;
403 case _adapter_opt_return_any : return T_CONFLICT; // sentinel value for "variable"
404 default : return T_OBJECT;
405 }
406 }
407
408 static int ek_adapter_opt_spread_count(EntryKind ek) {
409 assert(ek >= _adapter_opt_spread_FIRST && ek <= _adapter_opt_spread_LAST, "");
410 switch (ek) {
411 case _adapter_opt_spread_0 : return 0;
412 case _adapter_opt_spread_1_ref : return 1;
413 case _adapter_opt_spread_2_ref : return 2;
414 case _adapter_opt_spread_3_ref : return 3;
415 case _adapter_opt_spread_4_ref : return 4;
416 case _adapter_opt_spread_5_ref : return 5;
417 default : return -1; // sentinel value for "variable"
418 }
419 }
420
421 static BasicType ek_adapter_opt_spread_type(EntryKind ek) {
422 assert(ek >= _adapter_opt_spread_FIRST && ek <= _adapter_opt_spread_LAST, "");
423 switch (ek) {
424 // (there is no _adapter_opt_spread_boolean; we use byte)
425 case _adapter_opt_spread_byte : return T_BYTE;
426 case _adapter_opt_spread_char : return T_CHAR;
427 case _adapter_opt_spread_short : return T_SHORT;
428 case _adapter_opt_spread_int : return T_INT;
429 case _adapter_opt_spread_long : return T_LONG;
430 case _adapter_opt_spread_float : return T_FLOAT;
431 case _adapter_opt_spread_double : return T_DOUBLE;
432 default : return T_OBJECT;
433 }
434 }
435
436 static methodOop raise_exception_method() {
437 oop rem = JNIHandles::resolve(_raise_exception_method);
438 assert(rem == NULL || rem->is_method(), "");
439 return (methodOop) rem;
440 }
441 static void set_raise_exception_method(methodOop rem) {
442 assert(_raise_exception_method == NULL, "");
443 _raise_exception_method = JNIHandles::make_global(Handle(rem));
444 }
445 static methodOop resolve_raise_exception_method(TRAPS);
446 // call raise_exception_method from C code:
447 static void raise_exception(int code, oop actual, oop required, TRAPS);
448
449 static jint adapter_conversion(int conv_op, BasicType src, BasicType dest,
450 int stack_move = 0, int vminfo = 0) {
451 assert(conv_op_valid(conv_op), "oob");
452 jint conv = ((conv_op << CONV_OP_SHIFT)
453 | (src << CONV_SRC_TYPE_SHIFT)
454 | (dest << CONV_DEST_TYPE_SHIFT)
455 | (stack_move << CONV_STACK_MOVE_SHIFT)
456 | (vminfo << CONV_VMINFO_SHIFT)
457 );
458 assert(adapter_conversion_op(conv) == conv_op, "decode conv_op");
459 assert(adapter_conversion_src_type(conv) == src, "decode src");
460 assert(adapter_conversion_dest_type(conv) == dest, "decode dest");
461 assert(adapter_conversion_stack_move(conv) == stack_move, "decode stack_move");
462 assert(adapter_conversion_vminfo(conv) == vminfo, "decode vminfo");
463 return conv;
464 }
465 static int adapter_conversion_op(jint conv) {
466 return ((conv >> CONV_OP_SHIFT) & 0xF);
467 }
468 static BasicType adapter_conversion_src_type(jint conv) {
469 return (BasicType)((conv >> CONV_SRC_TYPE_SHIFT) & 0xF);
470 }
471 static BasicType adapter_conversion_dest_type(jint conv) {
472 return (BasicType)((conv >> CONV_DEST_TYPE_SHIFT) & 0xF);
473 }
474 static int adapter_conversion_stack_move(jint conv) {
475 return (conv >> CONV_STACK_MOVE_SHIFT);
476 }
477 static int adapter_conversion_vminfo(jint conv) {
478 return (conv >> CONV_VMINFO_SHIFT) & CONV_VMINFO_MASK;
479 }
480
481 // Bit mask of conversion_op values. May vary by platform.
482 static int adapter_conversion_ops_supported_mask();
483
484 static bool conv_op_supported(int conv_op) {
485 assert(conv_op_valid(conv_op), "");
486 return ((adapter_conversion_ops_supported_mask() & nth_bit(conv_op)) != 0);
487 }
488
489 // Offset in words that the interpreter stack pointer moves when an argument is pushed.
490 // The stack_move value must always be a multiple of this.
491 static int stack_move_unit() {
492 return frame::interpreter_frame_expression_stack_direction() * Interpreter::stackElementWords;
493 }
494
495 // Adapter frame traversal. (Implementation-specific.)
496 static frame ricochet_frame_sender(const frame& fr, RegisterMap* reg_map);
497 static void ricochet_frame_oops_do(const frame& fr, OopClosure* blk, const RegisterMap* reg_map);
498
499 enum { CONV_VMINFO_SIGN_FLAG = 0x80 };
500 // Shift values for prim-to-prim conversions.
501 static int adapter_prim_to_prim_subword_vminfo(BasicType dest) {
502 if (dest == T_BOOLEAN) return (BitsPerInt - 1); // boolean is 1 bit
503 if (dest == T_CHAR) return (BitsPerInt - BitsPerShort);
504 if (dest == T_BYTE) return (BitsPerInt - BitsPerByte ) | CONV_VMINFO_SIGN_FLAG;
505 if (dest == T_SHORT) return (BitsPerInt - BitsPerShort) | CONV_VMINFO_SIGN_FLAG;
506 return 0; // case T_INT
507 }
508 // Shift values for unboxing a primitive.
509 static int adapter_unbox_subword_vminfo(BasicType dest) {
510 if (dest == T_BOOLEAN) return (BitsPerInt - BitsPerByte ); // implemented as 1 byte
511 if (dest == T_CHAR) return (BitsPerInt - BitsPerShort);
512 if (dest == T_BYTE) return (BitsPerInt - BitsPerByte ) | CONV_VMINFO_SIGN_FLAG;
513 if (dest == T_SHORT) return (BitsPerInt - BitsPerShort) | CONV_VMINFO_SIGN_FLAG;
514 return 0; // case T_INT
515 }
516 // Here is the transformation the i2i adapter must perform:
517 static int truncate_subword_from_vminfo(jint value, int vminfo) {
518 int shift = vminfo & ~CONV_VMINFO_SIGN_FLAG;
519 jint tem = value << shift;
520 if ((vminfo & CONV_VMINFO_SIGN_FLAG) != 0) {
521 return (jint)tem >> shift;
522 } else {
523 return (juint)tem >> shift;
524 }
525 }
526
527 static inline address from_compiled_entry(EntryKind ek);
528 static inline address from_interpreted_entry(EntryKind ek);
529
530 // helpers for decode_method.
531 static methodOop decode_methodOop(methodOop m, int& decode_flags_result);
532 static methodHandle decode_vmtarget(oop vmtarget, int vmindex, oop mtype, KlassHandle& receiver_limit_result, int& decode_flags_result);
533 static methodHandle decode_MemberName(oop mname, KlassHandle& receiver_limit_result, int& decode_flags_result);
534 static methodHandle decode_MethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result);
535 static methodHandle decode_DirectMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result);
536 static methodHandle decode_BoundMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result);
537 static methodHandle decode_AdapterMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result);
538
539 // Find out how many stack slots an mh pushes or pops.
540 // The result is *not* reported as a multiple of stack_move_unit();
541 // It is a signed net number of pushes (a difference in vmslots).
542 // To compare with a stack_move value, first multiply by stack_move_unit().
543 static int decode_MethodHandle_stack_pushes(oop mh);
544
545 public: 52 public:
546 // working with member names 53 // working with member names
547 static void resolve_MemberName(Handle mname, TRAPS); // compute vmtarget/vmindex from name/type 54 static Handle resolve_MemberName(Handle mname, TRAPS); // compute vmtarget/vmindex from name/type
548 static void expand_MemberName(Handle mname, int suppress, TRAPS); // expand defc/name/type if missing 55 static void expand_MemberName(Handle mname, int suppress, TRAPS); // expand defc/name/type if missing
549 static Handle new_MemberName(TRAPS); // must be followed by init_MemberName 56 static Handle new_MemberName(TRAPS); // must be followed by init_MemberName
550 static void init_MemberName(oop mname_oop, oop target); // compute vmtarget/vmindex from target 57 static oop init_MemberName(oop mname_oop, oop target_oop); // compute vmtarget/vmindex from target
551 static void init_MemberName(oop mname_oop, methodOop m, bool do_dispatch = true); 58 static oop init_method_MemberName(oop mname_oop, methodOop m, bool do_dispatch,
552 static void init_MemberName(oop mname_oop, klassOop field_holder, AccessFlags mods, int offset); 59 klassOop receiver_limit);
60 static oop init_field_MemberName(oop mname_oop, klassOop field_holder,
61 AccessFlags mods, oop type, oop name,
62 intptr_t offset, bool is_setter = false);
63 static Handle init_method_MemberName(oop mname_oop, CallInfo& info, TRAPS);
64 static Handle init_field_MemberName(oop mname_oop, FieldAccessInfo& info, TRAPS);
65 static int method_ref_kind(methodOop m, bool do_dispatch_if_possible = true);
553 static int find_MemberNames(klassOop k, Symbol* name, Symbol* sig, 66 static int find_MemberNames(klassOop k, Symbol* name, Symbol* sig,
554 int mflags, klassOop caller, 67 int mflags, klassOop caller,
555 int skip, objArrayOop results); 68 int skip, objArrayOop results);
556 // bit values for suppress argument to expand_MemberName: 69 // bit values for suppress argument to expand_MemberName:
557 enum { _suppress_defc = 1, _suppress_name = 2, _suppress_type = 4 }; 70 enum { _suppress_defc = 1, _suppress_name = 2, _suppress_type = 4 };
558 71
559 // Generate MethodHandles adapters. 72 // Generate MethodHandles adapters.
560 static void generate_adapters(); 73 static void generate_adapters();
561 74
562 // Called from InterpreterGenerator and MethodHandlesAdapterGenerator. 75 // Called from MethodHandlesAdapterGenerator.
563 static address generate_method_handle_interpreter_entry(MacroAssembler* _masm); 76 static address generate_method_handle_interpreter_entry(MacroAssembler* _masm, vmIntrinsics::ID iid);
564 static void generate_method_handle_stub(MacroAssembler* _masm, EntryKind ek); 77 static void generate_method_handle_dispatch(MacroAssembler* _masm,
565 78 vmIntrinsics::ID iid,
566 // argument list parsing 79 Register receiver_reg,
567 static int argument_slot(oop method_type, int arg); 80 Register member_reg,
568 static int argument_slot_count(oop method_type) { return argument_slot(method_type, -1); } 81 bool for_compiler_entry);
569 static int argument_slot_to_argnum(oop method_type, int argslot); 82
570 83 // Queries
571 // Runtime support 84 static bool is_signature_polymorphic(vmIntrinsics::ID iid) {
572 enum { // bit-encoded flags from decode_method or decode_vmref 85 return (iid >= vmIntrinsics::FIRST_MH_SIG_POLY &&
573 _dmf_has_receiver = 0x01, // target method has leading reference argument 86 iid <= vmIntrinsics::LAST_MH_SIG_POLY);
574 _dmf_does_dispatch = 0x02, // method handle performs virtual or interface dispatch 87 }
575 _dmf_from_interface = 0x04, // peforms interface dispatch 88
576 _DMF_DIRECT_MASK = (_dmf_from_interface*2 - _dmf_has_receiver), 89 static bool is_signature_polymorphic_intrinsic(vmIntrinsics::ID iid) {
577 _dmf_binds_method = 0x08, 90 assert(is_signature_polymorphic(iid), "");
578 _dmf_binds_argument = 0x10, 91 // Most sig-poly methods are intrinsics which do not require an
579 _DMF_BOUND_MASK = (_dmf_binds_argument*2 - _dmf_binds_method), 92 // appeal to Java for adapter code.
580 _dmf_adapter_lsb = 0x20, 93 return (iid != vmIntrinsics::_invokeGeneric);
581 _DMF_ADAPTER_MASK = (_dmf_adapter_lsb << CONV_OP_LIMIT) - _dmf_adapter_lsb 94 }
582 }; 95
583 static methodHandle decode_method(oop x, KlassHandle& receiver_limit_result, int& decode_flags_result); 96 static bool is_signature_polymorphic_static(vmIntrinsics::ID iid) {
97 assert(is_signature_polymorphic(iid), "");
98 return (iid >= vmIntrinsics::FIRST_MH_STATIC &&
99 iid <= vmIntrinsics::LAST_MH_SIG_POLY);
100 }
101
102 static bool has_member_arg(vmIntrinsics::ID iid) {
103 assert(is_signature_polymorphic(iid), "");
104 return (iid >= vmIntrinsics::_linkToVirtual &&
105 iid <= vmIntrinsics::_linkToInterface);
106 }
107 static bool has_member_arg(Symbol* klass, Symbol* name) {
108 if ((klass == vmSymbols::java_lang_invoke_MethodHandle()) &&
109 is_signature_polymorphic_name(name)) {
110 vmIntrinsics::ID iid = signature_polymorphic_name_id(name);
111 return has_member_arg(iid);
112 }
113 return false;
114 }
115
116 static Symbol* signature_polymorphic_intrinsic_name(vmIntrinsics::ID iid);
117 static int signature_polymorphic_intrinsic_ref_kind(vmIntrinsics::ID iid);
118
119 static vmIntrinsics::ID signature_polymorphic_name_id(klassOop klass, Symbol* name);
120 static vmIntrinsics::ID signature_polymorphic_name_id(Symbol* name);
121 static bool is_signature_polymorphic_name(Symbol* name) {
122 return signature_polymorphic_name_id(name) != vmIntrinsics::_none;
123 }
124 static bool is_method_handle_invoke_name(klassOop klass, Symbol* name);
125 static bool is_signature_polymorphic_name(klassOop klass, Symbol* name) {
126 return signature_polymorphic_name_id(klass, name) != vmIntrinsics::_none;
127 }
128
584 enum { 129 enum {
585 // format of query to getConstant: 130 // format of query to getConstant:
586 GC_JVM_PUSH_LIMIT = 0,
587 GC_JVM_STACK_MOVE_UNIT = 1,
588 GC_CONV_OP_IMPLEMENTED_MASK = 2,
589 GC_OP_ROT_ARGS_DOWN_LIMIT_BIAS = 3,
590 GC_COUNT_GWT = 4, 131 GC_COUNT_GWT = 4,
591 132 GC_LAMBDA_SUPPORT = 5
592 // format of result from getTarget / encode_target:
593 ETF_HANDLE_OR_METHOD_NAME = 0, // all available data (immediate MH or method)
594 ETF_DIRECT_HANDLE = 1, // ultimate method handle (will be a DMH, may be self)
595 ETF_METHOD_NAME = 2, // ultimate method as MemberName
596 ETF_REFLECT_METHOD = 3, // ultimate method as java.lang.reflect object (sans refClass)
597 ETF_FORCE_DIRECT_HANDLE = 64,
598 ETF_COMPILE_DIRECT_HANDLE = 65,
599
600 // ad hoc constants
601 OP_ROT_ARGS_DOWN_LIMIT_BIAS = -1
602 }; 133 };
603 static int get_named_constant(int which, Handle name_box, TRAPS); 134 static int get_named_constant(int which, Handle name_box, TRAPS);
604 static oop encode_target(Handle mh, int format, TRAPS); // report vmtarget (to Java code)
605 static bool class_cast_needed(klassOop src, klassOop dst);
606
607 static instanceKlassHandle resolve_instance_klass(oop java_mirror_oop, TRAPS);
608 static instanceKlassHandle resolve_instance_klass(jclass java_mirror_jh, TRAPS) {
609 return resolve_instance_klass(JNIHandles::resolve(java_mirror_jh), THREAD);
610 }
611
612 private:
613 // These checkers operate on a pair of whole MethodTypes:
614 static const char* check_method_type_change(oop src_mtype, int src_beg, int src_end,
615 int insert_argnum, oop insert_type,
616 int change_argnum, oop change_type,
617 int delete_argnum,
618 oop dst_mtype, int dst_beg, int dst_end,
619 bool raw = false);
620 static const char* check_method_type_insertion(oop src_mtype,
621 int insert_argnum, oop insert_type,
622 oop dst_mtype) {
623 oop no_ref = NULL;
624 return check_method_type_change(src_mtype, 0, -1,
625 insert_argnum, insert_type,
626 -1, no_ref, -1, dst_mtype, 0, -1);
627 }
628 static const char* check_method_type_conversion(oop src_mtype,
629 int change_argnum, oop change_type,
630 oop dst_mtype) {
631 oop no_ref = NULL;
632 return check_method_type_change(src_mtype, 0, -1, -1, no_ref,
633 change_argnum, change_type,
634 -1, dst_mtype, 0, -1);
635 }
636 static const char* check_method_type_passthrough(oop src_mtype, oop dst_mtype, bool raw) {
637 oop no_ref = NULL;
638 return check_method_type_change(src_mtype, 0, -1,
639 -1, no_ref, -1, no_ref, -1,
640 dst_mtype, 0, -1, raw);
641 }
642
643 // These checkers operate on pairs of argument or return types:
644 static const char* check_argument_type_change(BasicType src_type, klassOop src_klass,
645 BasicType dst_type, klassOop dst_klass,
646 int argnum, bool raw = false);
647
648 static const char* check_argument_type_change(oop src_type, oop dst_type,
649 int argnum, bool raw = false) {
650 klassOop src_klass = NULL, dst_klass = NULL;
651 BasicType src_bt = java_lang_Class::as_BasicType(src_type, &src_klass);
652 BasicType dst_bt = java_lang_Class::as_BasicType(dst_type, &dst_klass);
653 return check_argument_type_change(src_bt, src_klass,
654 dst_bt, dst_klass, argnum, raw);
655 }
656
657 static const char* check_return_type_change(oop src_type, oop dst_type, bool raw = false) {
658 return check_argument_type_change(src_type, dst_type, -1, raw);
659 }
660
661 static const char* check_return_type_change(BasicType src_type, klassOop src_klass,
662 BasicType dst_type, klassOop dst_klass) {
663 return check_argument_type_change(src_type, src_klass, dst_type, dst_klass, -1);
664 }
665
666 static const char* check_method_receiver(methodOop m, klassOop passed_recv_type);
667
668 // These verifiers can block, and will throw an error if the checking fails:
669 static void verify_vmslots(Handle mh, TRAPS);
670 static void verify_vmargslot(Handle mh, int argnum, int argslot, TRAPS);
671
672 static void verify_method_type(methodHandle m, Handle mtype,
673 bool has_bound_oop,
674 KlassHandle bound_oop_type,
675 TRAPS);
676
677 static void verify_method_signature(methodHandle m, Handle mtype,
678 int first_ptype_pos,
679 KlassHandle insert_ptype, TRAPS);
680
681 static void verify_DirectMethodHandle(Handle mh, methodHandle m, TRAPS);
682 static void verify_BoundMethodHandle(Handle mh, Handle target, int argnum,
683 bool direct_to_method, TRAPS);
684 static void verify_BoundMethodHandle_with_receiver(Handle mh, methodHandle m, TRAPS);
685 static void verify_AdapterMethodHandle(Handle mh, int argnum, TRAPS);
686
687 public:
688
689 // Fill in the fields of a DirectMethodHandle mh. (MH.type must be pre-filled.)
690 static void init_DirectMethodHandle(Handle mh, methodHandle method, bool do_dispatch, TRAPS);
691
692 // Fill in the fields of a BoundMethodHandle mh. (MH.type, BMH.argument must be pre-filled.)
693 static void init_BoundMethodHandle(Handle mh, Handle target, int argnum, TRAPS);
694 static void init_BoundMethodHandle_with_receiver(Handle mh,
695 methodHandle original_m,
696 KlassHandle receiver_limit,
697 int decode_flags,
698 TRAPS);
699
700 // Fill in the fields of an AdapterMethodHandle mh. (MH.type must be pre-filled.)
701 static void init_AdapterMethodHandle(Handle mh, Handle target, int argnum, TRAPS);
702 static void ensure_vmlayout_field(Handle target, TRAPS);
703
704 #ifdef ASSERT
705 static bool spot_check_entry_names();
706 #endif
707
708 private:
709 static methodHandle dispatch_decoded_method(methodHandle m,
710 KlassHandle receiver_limit,
711 int decode_flags,
712 KlassHandle receiver_klass,
713 TRAPS);
714 135
715 public: 136 public:
716 static bool is_float_fixed_reinterpretation_cast(BasicType src, BasicType dst); 137 static Symbol* lookup_signature(oop type_str, bool polymorphic, TRAPS); // use TempNewSymbol
717 static bool same_basic_type_for_arguments(BasicType src, BasicType dst, 138 static Symbol* lookup_basic_type_signature(Symbol* sig, bool keep_last_arg, TRAPS); // use TempNewSymbol
718 bool raw = false, 139 static Symbol* lookup_basic_type_signature(Symbol* sig, TRAPS) {
719 bool for_return = false); 140 return lookup_basic_type_signature(sig, false, THREAD);
720 static bool same_basic_type_for_returns(BasicType src, BasicType dst, bool raw = false) { 141 }
721 return same_basic_type_for_arguments(src, dst, raw, true); 142 static bool is_basic_type_signature(Symbol* sig);
722 } 143
723 144 static Symbol* lookup_method_type(Symbol* msig, Handle mtype, TRAPS);
724 static Symbol* convert_to_signature(oop type_str, bool polymorphic, TRAPS); 145
146 static void print_as_method_type_on(outputStream* st, Symbol* sig) {
147 print_as_basic_type_signature_on(st, sig, true, true);
148 }
149 static void print_as_basic_type_signature_on(outputStream* st, Symbol* sig, bool keep_arrays = false, bool keep_basic_names = false);
150
151 // decoding CONSTANT_MethodHandle constants
152 enum { JVM_REF_MIN = JVM_REF_getField, JVM_REF_MAX = JVM_REF_invokeInterface };
153 static bool ref_kind_is_valid(int ref_kind) {
154 return (ref_kind >= JVM_REF_MIN && ref_kind <= JVM_REF_MAX);
155 }
156 static bool ref_kind_is_field(int ref_kind) {
157 assert(ref_kind_is_valid(ref_kind), "");
158 return (ref_kind <= JVM_REF_putStatic);
159 }
160 static bool ref_kind_is_getter(int ref_kind) {
161 assert(ref_kind_is_valid(ref_kind), "");
162 return (ref_kind <= JVM_REF_getStatic);
163 }
164 static bool ref_kind_is_setter(int ref_kind) {
165 return ref_kind_is_field(ref_kind) && !ref_kind_is_getter(ref_kind);
166 }
167 static bool ref_kind_is_method(int ref_kind) {
168 return !ref_kind_is_field(ref_kind) && (ref_kind != JVM_REF_newInvokeSpecial);
169 }
170 static bool ref_kind_has_receiver(int ref_kind) {
171 assert(ref_kind_is_valid(ref_kind), "");
172 return (ref_kind & 1) != 0;
173 }
174 static bool ref_kind_is_static(int ref_kind) {
175 return !ref_kind_has_receiver(ref_kind) && (ref_kind != JVM_REF_newInvokeSpecial);
176 }
177 static bool ref_kind_does_dispatch(int ref_kind) {
178 return (ref_kind == JVM_REF_invokeVirtual ||
179 ref_kind == JVM_REF_invokeInterface);
180 }
181
725 182
726 #ifdef TARGET_ARCH_x86 183 #ifdef TARGET_ARCH_x86
727 # include "methodHandles_x86.hpp" 184 # include "methodHandles_x86.hpp"
728 #endif 185 #endif
729 #ifdef TARGET_ARCH_sparc 186 #ifdef TARGET_ARCH_sparc
736 # include "methodHandles_arm.hpp" 193 # include "methodHandles_arm.hpp"
737 #endif 194 #endif
738 #ifdef TARGET_ARCH_ppc 195 #ifdef TARGET_ARCH_ppc
739 # include "methodHandles_ppc.hpp" 196 # include "methodHandles_ppc.hpp"
740 #endif 197 #endif
198
199
741 }; 200 };
742
743
744 // Access methods for the "entry" field of a java.lang.invoke.MethodHandle.
745 // The field is primarily a jump target for compiled calls.
746 // However, we squirrel away some nice pointers for other uses,
747 // just before the jump target.
748 // Aspects of a method handle entry:
749 // - from_compiled_entry - stub used when compiled code calls the MH
750 // - from_interpreted_entry - stub used when the interpreter calls the MH
751 // - type_checking_entry - stub for runtime casting between MHForm siblings (NYI)
752 class MethodHandleEntry {
753 public:
754 class Data {
755 friend class MethodHandleEntry;
756 size_t _total_size; // size including Data and code stub
757 MethodHandleEntry* _type_checking_entry;
758 address _from_interpreted_entry;
759 MethodHandleEntry* method_entry() { return (MethodHandleEntry*)(this + 1); }
760 };
761
762 Data* data() { return (Data*)this - 1; }
763
764 address start_address() { return (address) data(); }
765 address end_address() { return start_address() + data()->_total_size; }
766
767 address from_compiled_entry() { return (address) this; }
768
769 address from_interpreted_entry() { return data()->_from_interpreted_entry; }
770 void set_from_interpreted_entry(address e) { data()->_from_interpreted_entry = e; }
771
772 MethodHandleEntry* type_checking_entry() { return data()->_type_checking_entry; }
773 void set_type_checking_entry(MethodHandleEntry* e) { data()->_type_checking_entry = e; }
774
775 void set_end_address(address end_addr) {
776 size_t total_size = end_addr - start_address();
777 assert(total_size > 0 && total_size < 0x1000, "reasonable end address");
778 data()->_total_size = total_size;
779 }
780
781 // Compiler support:
782 static int from_interpreted_entry_offset_in_bytes() {
783 return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) );
784 }
785 static int type_checking_entry_offset_in_bytes() {
786 return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) );
787 }
788
789 static address start_compiled_entry(MacroAssembler* _masm,
790 address interpreted_entry = NULL);
791 static MethodHandleEntry* finish_compiled_entry(MacroAssembler* masm, address start_addr);
792 };
793
794 address MethodHandles::from_compiled_entry(EntryKind ek) { return entry(ek)->from_compiled_entry(); }
795 address MethodHandles::from_interpreted_entry(EntryKind ek) { return entry(ek)->from_interpreted_entry(); }
796 201
797 202
798 //------------------------------------------------------------------------------ 203 //------------------------------------------------------------------------------
799 // MethodHandlesAdapterGenerator 204 // MethodHandlesAdapterGenerator
800 // 205 //