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src/share/vm/prims/methodHandles.hpp@ddd894528dbc
src/share/vm/prims/methodHandles.hpp
Thu, 23 Jun 2011 17:14:06 -0700
- author
- jrose
- date
- Thu, 23 Jun 2011 17:14:06 -0700
- changeset 2982
- ddd894528dbc
- parent 2954
- f8c9417e3571
- child 3105
- c26de9aef2ed
- permissions
- -rw-r--r--
7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
Reviewed-by: never
1 /*
2 * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_PRIMS_METHODHANDLES_HPP
26 #define SHARE_VM_PRIMS_METHODHANDLES_HPP
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "runtime/frame.inline.hpp"
31 #include "runtime/globals.hpp"
32 #include "runtime/interfaceSupport.hpp"
34 class MacroAssembler;
35 class Label;
36 class MethodHandleEntry;
38 class MethodHandles: AllStatic {
39 // JVM support for MethodHandle, MethodType, and related types
40 // in java.lang.invoke and sun.invoke.
41 // See also javaClasses for layouts java_lang_invoke_Method{Handle,Type,Type::Form}.
42 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,
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,
73 // Optimized adapter types
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
92 // reference to primitive:
93 _adapter_opt_unboxi,
94 _adapter_opt_unboxl,
96 // %% Maybe tame the following with a VM_SYMBOLS_DO type macro?
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,
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,
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,
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,
190 _EK_LIMIT,
191 _EK_FIRST = 0
192 };
194 public:
195 static bool enabled() { return _enabled; }
196 static void set_enabled(bool z);
198 private:
199 enum { // import java_lang_invoke_AdapterMethodHandle::CONV_OP_*
200 CONV_OP_LIMIT = java_lang_invoke_AdapterMethodHandle::CONV_OP_LIMIT,
201 CONV_OP_MASK = java_lang_invoke_AdapterMethodHandle::CONV_OP_MASK,
202 CONV_TYPE_MASK = java_lang_invoke_AdapterMethodHandle::CONV_TYPE_MASK,
203 CONV_VMINFO_MASK = java_lang_invoke_AdapterMethodHandle::CONV_VMINFO_MASK,
204 CONV_VMINFO_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_VMINFO_SHIFT,
205 CONV_OP_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_OP_SHIFT,
206 CONV_DEST_TYPE_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_DEST_TYPE_SHIFT,
207 CONV_SRC_TYPE_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_SRC_TYPE_SHIFT,
208 CONV_STACK_MOVE_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_STACK_MOVE_SHIFT,
209 CONV_STACK_MOVE_MASK = java_lang_invoke_AdapterMethodHandle::CONV_STACK_MOVE_MASK
210 };
212 static bool _enabled;
213 static MethodHandleEntry* _entries[_EK_LIMIT];
214 static const char* _entry_names[_EK_LIMIT+1];
215 static jobject _raise_exception_method;
216 static address _adapter_return_handlers[CONV_TYPE_MASK+1];
218 // Adapters.
219 static MethodHandlesAdapterBlob* _adapter_code;
221 static bool ek_valid(EntryKind ek) { return (uint)ek < (uint)_EK_LIMIT; }
222 static bool conv_op_valid(int op) { return (uint)op < (uint)CONV_OP_LIMIT; }
224 public:
225 static bool have_entry(EntryKind ek) { return ek_valid(ek) && _entries[ek] != NULL; }
226 static MethodHandleEntry* entry(EntryKind ek) { assert(ek_valid(ek), "initialized");
227 return _entries[ek]; }
228 static const char* entry_name(EntryKind ek) { assert(ek_valid(ek), "oob");
229 return _entry_names[ek]; }
230 static EntryKind adapter_entry_kind(int op) { assert(conv_op_valid(op), "oob");
231 return EntryKind(_adapter_mh_first + op); }
233 static void init_entry(EntryKind ek, MethodHandleEntry* me) {
234 assert(ek_valid(ek), "oob");
235 assert(_entries[ek] == NULL, "no double initialization");
236 _entries[ek] = me;
237 }
239 // Some adapter helper functions.
240 static EntryKind ek_original_kind(EntryKind ek) {
241 if (ek <= _adapter_mh_last) return ek;
242 switch (ek) {
243 case _adapter_opt_swap_1:
244 case _adapter_opt_swap_2:
245 return _adapter_swap_args;
246 case _adapter_opt_rot_1_up:
247 case _adapter_opt_rot_1_down:
248 case _adapter_opt_rot_2_up:
249 case _adapter_opt_rot_2_down:
250 return _adapter_rot_args;
251 case _adapter_opt_i2i:
252 case _adapter_opt_l2i:
253 case _adapter_opt_d2f:
254 case _adapter_opt_i2l:
255 case _adapter_opt_f2d:
256 return _adapter_prim_to_prim;
257 case _adapter_opt_unboxi:
258 case _adapter_opt_unboxl:
259 return _adapter_ref_to_prim;
260 }
261 if (ek >= _adapter_opt_spread_FIRST && ek <= _adapter_opt_spread_LAST)
262 return _adapter_spread_args;
263 if (ek >= _adapter_opt_collect_FIRST && ek <= _adapter_opt_collect_LAST)
264 return _adapter_collect_args;
265 if (ek >= _adapter_opt_fold_FIRST && ek <= _adapter_opt_fold_LAST)
266 return _adapter_fold_args;
267 if (ek >= _adapter_opt_return_FIRST && ek <= _adapter_opt_return_LAST)
268 return _adapter_opt_return_any;
269 assert(false, "oob");
270 return _EK_LIMIT;
271 }
273 static bool ek_supported(MethodHandles::EntryKind ek);
275 static BasicType ek_bound_mh_arg_type(EntryKind ek) {
276 switch (ek) {
277 case _bound_int_mh : // fall-thru
278 case _bound_int_direct_mh : return T_INT;
279 case _bound_long_mh : // fall-thru
280 case _bound_long_direct_mh : return T_LONG;
281 default : return T_OBJECT;
282 }
283 }
285 static int ek_adapter_opt_swap_slots(EntryKind ek) {
286 switch (ek) {
287 case _adapter_opt_swap_1 : return 1;
288 case _adapter_opt_swap_2 : return 2;
289 case _adapter_opt_rot_1_up : return 1;
290 case _adapter_opt_rot_1_down : return 1;
291 case _adapter_opt_rot_2_up : return 2;
292 case _adapter_opt_rot_2_down : return 2;
293 default : ShouldNotReachHere(); return -1;
294 }
295 }
297 static int ek_adapter_opt_swap_mode(EntryKind ek) {
298 switch (ek) {
299 case _adapter_opt_swap_1 : return 0;
300 case _adapter_opt_swap_2 : return 0;
301 case _adapter_opt_rot_1_up : return 1;
302 case _adapter_opt_rot_1_down : return -1;
303 case _adapter_opt_rot_2_up : return 1;
304 case _adapter_opt_rot_2_down : return -1;
305 default : ShouldNotReachHere(); return 0;
306 }
307 }
309 static int ek_adapter_opt_collect_count(EntryKind ek) {
310 assert(ek >= _adapter_opt_collect_FIRST && ek <= _adapter_opt_collect_LAST ||
311 ek >= _adapter_opt_fold_FIRST && ek <= _adapter_opt_fold_LAST, "");
312 switch (ek) {
313 case _adapter_opt_collect_0_ref : return 0;
314 case _adapter_opt_filter_S0_ref :
315 case _adapter_opt_filter_S1_ref :
316 case _adapter_opt_filter_S2_ref :
317 case _adapter_opt_filter_S3_ref :
318 case _adapter_opt_filter_S4_ref :
319 case _adapter_opt_filter_S5_ref :
320 case _adapter_opt_fold_1_ref :
321 case _adapter_opt_collect_1_ref : return 1;
322 case _adapter_opt_collect_2_S0_ref :
323 case _adapter_opt_collect_2_S1_ref :
324 case _adapter_opt_collect_2_S2_ref :
325 case _adapter_opt_collect_2_S3_ref :
326 case _adapter_opt_collect_2_S4_ref :
327 case _adapter_opt_collect_2_S5_ref :
328 case _adapter_opt_fold_2_ref :
329 case _adapter_opt_collect_2_ref : return 2;
330 case _adapter_opt_fold_3_ref :
331 case _adapter_opt_collect_3_ref : return 3;
332 case _adapter_opt_fold_4_ref :
333 case _adapter_opt_collect_4_ref : return 4;
334 case _adapter_opt_fold_5_ref :
335 case _adapter_opt_collect_5_ref : return 5;
336 default : return -1; // sentinel value for "variable"
337 }
338 }
340 static int ek_adapter_opt_collect_slot(EntryKind ek) {
341 assert(ek >= _adapter_opt_collect_FIRST && ek <= _adapter_opt_collect_LAST ||
342 ek >= _adapter_opt_fold_FIRST && ek <= _adapter_opt_fold_LAST, "");
343 switch (ek) {
344 case _adapter_opt_collect_2_S0_ref :
345 case _adapter_opt_filter_S0_ref : return 0;
346 case _adapter_opt_collect_2_S1_ref :
347 case _adapter_opt_filter_S1_ref : return 1;
348 case _adapter_opt_collect_2_S2_ref :
349 case _adapter_opt_filter_S2_ref : return 2;
350 case _adapter_opt_collect_2_S3_ref :
351 case _adapter_opt_filter_S3_ref : return 3;
352 case _adapter_opt_collect_2_S4_ref :
353 case _adapter_opt_filter_S4_ref : return 4;
354 case _adapter_opt_collect_2_S5_ref :
355 case _adapter_opt_filter_S5_ref : return 5;
356 default : return -1; // sentinel value for "variable"
357 }
358 }
360 static BasicType ek_adapter_opt_collect_type(EntryKind ek) {
361 assert(ek >= _adapter_opt_collect_FIRST && ek <= _adapter_opt_collect_LAST ||
362 ek >= _adapter_opt_fold_FIRST && ek <= _adapter_opt_fold_LAST, "");
363 switch (ek) {
364 case _adapter_opt_fold_int :
365 case _adapter_opt_collect_int : return T_INT;
366 case _adapter_opt_fold_long :
367 case _adapter_opt_collect_long : return T_LONG;
368 case _adapter_opt_fold_float :
369 case _adapter_opt_collect_float : return T_FLOAT;
370 case _adapter_opt_fold_double :
371 case _adapter_opt_collect_double : return T_DOUBLE;
372 case _adapter_opt_fold_void :
373 case _adapter_opt_collect_void : return T_VOID;
374 default : return T_OBJECT;
375 }
376 }
378 static int ek_adapter_opt_return_slot(EntryKind ek) {
379 assert(ek >= _adapter_opt_return_FIRST && ek <= _adapter_opt_return_LAST, "");
380 switch (ek) {
381 case _adapter_opt_return_S0_ref : return 0;
382 case _adapter_opt_return_S1_ref : return 1;
383 case _adapter_opt_return_S2_ref : return 2;
384 case _adapter_opt_return_S3_ref : return 3;
385 case _adapter_opt_return_S4_ref : return 4;
386 case _adapter_opt_return_S5_ref : return 5;
387 default : return -1; // sentinel value for "variable"
388 }
389 }
391 static BasicType ek_adapter_opt_return_type(EntryKind ek) {
392 assert(ek >= _adapter_opt_return_FIRST && ek <= _adapter_opt_return_LAST, "");
393 switch (ek) {
394 case _adapter_opt_return_int : return T_INT;
395 case _adapter_opt_return_long : return T_LONG;
396 case _adapter_opt_return_float : return T_FLOAT;
397 case _adapter_opt_return_double : return T_DOUBLE;
398 case _adapter_opt_return_void : return T_VOID;
399 case _adapter_opt_return_any : return T_CONFLICT; // sentinel value for "variable"
400 default : return T_OBJECT;
401 }
402 }
404 static int ek_adapter_opt_spread_count(EntryKind ek) {
405 assert(ek >= _adapter_opt_spread_FIRST && ek <= _adapter_opt_spread_LAST, "");
406 switch (ek) {
407 case _adapter_opt_spread_0 : return 0;
408 case _adapter_opt_spread_1_ref : return 1;
409 case _adapter_opt_spread_2_ref : return 2;
410 case _adapter_opt_spread_3_ref : return 3;
411 case _adapter_opt_spread_4_ref : return 4;
412 case _adapter_opt_spread_5_ref : return 5;
413 default : return -1; // sentinel value for "variable"
414 }
415 }
417 static BasicType ek_adapter_opt_spread_type(EntryKind ek) {
418 assert(ek >= _adapter_opt_spread_FIRST && ek <= _adapter_opt_spread_LAST, "");
419 switch (ek) {
420 // (there is no _adapter_opt_spread_boolean; we use byte)
421 case _adapter_opt_spread_byte : return T_BYTE;
422 case _adapter_opt_spread_char : return T_CHAR;
423 case _adapter_opt_spread_short : return T_SHORT;
424 case _adapter_opt_spread_int : return T_INT;
425 case _adapter_opt_spread_long : return T_LONG;
426 case _adapter_opt_spread_float : return T_FLOAT;
427 case _adapter_opt_spread_double : return T_DOUBLE;
428 default : return T_OBJECT;
429 }
430 }
432 static methodOop raise_exception_method() {
433 oop rem = JNIHandles::resolve(_raise_exception_method);
434 assert(rem == NULL || rem->is_method(), "");
435 return (methodOop) rem;
436 }
437 static void set_raise_exception_method(methodOop rem) {
438 assert(_raise_exception_method == NULL, "");
439 _raise_exception_method = JNIHandles::make_global(Handle(rem));
440 }
441 static methodOop resolve_raise_exception_method(TRAPS);
442 // call raise_exception_method from C code:
443 static void raise_exception(int code, oop actual, oop required, TRAPS);
445 static jint adapter_conversion(int conv_op, BasicType src, BasicType dest,
446 int stack_move = 0, int vminfo = 0) {
447 assert(conv_op_valid(conv_op), "oob");
448 jint conv = ((conv_op << CONV_OP_SHIFT)
449 | (src << CONV_SRC_TYPE_SHIFT)
450 | (dest << CONV_DEST_TYPE_SHIFT)
451 | (stack_move << CONV_STACK_MOVE_SHIFT)
452 | (vminfo << CONV_VMINFO_SHIFT)
453 );
454 assert(adapter_conversion_op(conv) == conv_op, "decode conv_op");
455 assert(adapter_conversion_src_type(conv) == src, "decode src");
456 assert(adapter_conversion_dest_type(conv) == dest, "decode dest");
457 assert(adapter_conversion_stack_move(conv) == stack_move, "decode stack_move");
458 assert(adapter_conversion_vminfo(conv) == vminfo, "decode vminfo");
459 return conv;
460 }
461 static int adapter_conversion_op(jint conv) {
462 return ((conv >> CONV_OP_SHIFT) & 0xF);
463 }
464 static BasicType adapter_conversion_src_type(jint conv) {
465 return (BasicType)((conv >> CONV_SRC_TYPE_SHIFT) & 0xF);
466 }
467 static BasicType adapter_conversion_dest_type(jint conv) {
468 return (BasicType)((conv >> CONV_DEST_TYPE_SHIFT) & 0xF);
469 }
470 static int adapter_conversion_stack_move(jint conv) {
471 return (conv >> CONV_STACK_MOVE_SHIFT);
472 }
473 static int adapter_conversion_vminfo(jint conv) {
474 return (conv >> CONV_VMINFO_SHIFT) & CONV_VMINFO_MASK;
475 }
477 // Bit mask of conversion_op values. May vary by platform.
478 static int adapter_conversion_ops_supported_mask();
480 static bool conv_op_supported(int conv_op) {
481 assert(conv_op_valid(conv_op), "");
482 return ((adapter_conversion_ops_supported_mask() & nth_bit(conv_op)) != 0);
483 }
485 // Offset in words that the interpreter stack pointer moves when an argument is pushed.
486 // The stack_move value must always be a multiple of this.
487 static int stack_move_unit() {
488 return frame::interpreter_frame_expression_stack_direction() * Interpreter::stackElementWords;
489 }
491 // Adapter frame traversal. (Implementation-specific.)
492 static frame ricochet_frame_sender(const frame& fr, RegisterMap* reg_map);
493 static void ricochet_frame_oops_do(const frame& fr, OopClosure* blk, const RegisterMap* reg_map);
495 enum { CONV_VMINFO_SIGN_FLAG = 0x80 };
496 // Shift values for prim-to-prim conversions.
497 static int adapter_prim_to_prim_subword_vminfo(BasicType dest) {
498 if (dest == T_BOOLEAN) return (BitsPerInt - 1); // boolean is 1 bit
499 if (dest == T_CHAR) return (BitsPerInt - BitsPerShort);
500 if (dest == T_BYTE) return (BitsPerInt - BitsPerByte ) | CONV_VMINFO_SIGN_FLAG;
501 if (dest == T_SHORT) return (BitsPerInt - BitsPerShort) | CONV_VMINFO_SIGN_FLAG;
502 return 0; // case T_INT
503 }
504 // Shift values for unboxing a primitive.
505 static int adapter_unbox_subword_vminfo(BasicType dest) {
506 if (dest == T_BOOLEAN) return (BitsPerInt - BitsPerByte ); // implemented as 1 byte
507 if (dest == T_CHAR) return (BitsPerInt - BitsPerShort);
508 if (dest == T_BYTE) return (BitsPerInt - BitsPerByte ) | CONV_VMINFO_SIGN_FLAG;
509 if (dest == T_SHORT) return (BitsPerInt - BitsPerShort) | CONV_VMINFO_SIGN_FLAG;
510 return 0; // case T_INT
511 }
512 // Here is the transformation the i2i adapter must perform:
513 static int truncate_subword_from_vminfo(jint value, int vminfo) {
514 jint tem = value << vminfo;
515 if ((vminfo & CONV_VMINFO_SIGN_FLAG) != 0) {
516 return (jint)tem >> vminfo;
517 } else {
518 return (juint)tem >> vminfo;
519 }
520 }
522 static inline address from_compiled_entry(EntryKind ek);
523 static inline address from_interpreted_entry(EntryKind ek);
525 // helpers for decode_method.
526 static methodOop decode_methodOop(methodOop m, int& decode_flags_result);
527 static methodHandle decode_vmtarget(oop vmtarget, int vmindex, oop mtype, KlassHandle& receiver_limit_result, int& decode_flags_result);
528 static methodHandle decode_MemberName(oop mname, KlassHandle& receiver_limit_result, int& decode_flags_result);
529 static methodHandle decode_MethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result);
530 static methodHandle decode_DirectMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result);
531 static methodHandle decode_BoundMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result);
532 static methodHandle decode_AdapterMethodHandle(oop mh, KlassHandle& receiver_limit_result, int& decode_flags_result);
534 // Find out how many stack slots an mh pushes or pops.
535 // The result is *not* reported as a multiple of stack_move_unit();
536 // It is a signed net number of pushes (a difference in vmslots).
537 // To compare with a stack_move value, first multiply by stack_move_unit().
538 static int decode_MethodHandle_stack_pushes(oop mh);
540 public:
541 // working with member names
542 static void resolve_MemberName(Handle mname, TRAPS); // compute vmtarget/vmindex from name/type
543 static void expand_MemberName(Handle mname, int suppress, TRAPS); // expand defc/name/type if missing
544 static Handle new_MemberName(TRAPS); // must be followed by init_MemberName
545 static void init_MemberName(oop mname_oop, oop target); // compute vmtarget/vmindex from target
546 static void init_MemberName(oop mname_oop, methodOop m, bool do_dispatch = true);
547 static void init_MemberName(oop mname_oop, klassOop field_holder, AccessFlags mods, int offset);
548 static int find_MemberNames(klassOop k, Symbol* name, Symbol* sig,
549 int mflags, klassOop caller,
550 int skip, objArrayOop results);
551 // bit values for suppress argument to expand_MemberName:
552 enum { _suppress_defc = 1, _suppress_name = 2, _suppress_type = 4 };
554 // Generate MethodHandles adapters.
555 static void generate_adapters();
557 // Called from InterpreterGenerator and MethodHandlesAdapterGenerator.
558 static address generate_method_handle_interpreter_entry(MacroAssembler* _masm);
559 static void generate_method_handle_stub(MacroAssembler* _masm, EntryKind ek);
561 // argument list parsing
562 static int argument_slot(oop method_type, int arg);
563 static int argument_slot_count(oop method_type) { return argument_slot(method_type, -1); }
564 static int argument_slot_to_argnum(oop method_type, int argslot);
566 // Runtime support
567 enum { // bit-encoded flags from decode_method or decode_vmref
568 _dmf_has_receiver = 0x01, // target method has leading reference argument
569 _dmf_does_dispatch = 0x02, // method handle performs virtual or interface dispatch
570 _dmf_from_interface = 0x04, // peforms interface dispatch
571 _DMF_DIRECT_MASK = (_dmf_from_interface*2 - _dmf_has_receiver),
572 _dmf_binds_method = 0x08,
573 _dmf_binds_argument = 0x10,
574 _DMF_BOUND_MASK = (_dmf_binds_argument*2 - _dmf_binds_method),
575 _dmf_adapter_lsb = 0x20,
576 _DMF_ADAPTER_MASK = (_dmf_adapter_lsb << CONV_OP_LIMIT) - _dmf_adapter_lsb
577 };
578 static methodHandle decode_method(oop x, KlassHandle& receiver_limit_result, int& decode_flags_result);
579 enum {
580 // format of query to getConstant:
581 GC_JVM_PUSH_LIMIT = 0,
582 GC_JVM_STACK_MOVE_UNIT = 1,
583 GC_CONV_OP_IMPLEMENTED_MASK = 2,
584 GC_OP_ROT_ARGS_DOWN_LIMIT_BIAS = 3,
586 // format of result from getTarget / encode_target:
587 ETF_HANDLE_OR_METHOD_NAME = 0, // all available data (immediate MH or method)
588 ETF_DIRECT_HANDLE = 1, // ultimate method handle (will be a DMH, may be self)
589 ETF_METHOD_NAME = 2, // ultimate method as MemberName
590 ETF_REFLECT_METHOD = 3, // ultimate method as java.lang.reflect object (sans refClass)
591 ETF_FORCE_DIRECT_HANDLE = 64,
592 ETF_COMPILE_DIRECT_HANDLE = 65,
594 // ad hoc constants
595 OP_ROT_ARGS_DOWN_LIMIT_BIAS = -1
596 };
597 static int get_named_constant(int which, Handle name_box, TRAPS);
598 static oop encode_target(Handle mh, int format, TRAPS); // report vmtarget (to Java code)
599 static bool class_cast_needed(klassOop src, klassOop dst);
601 static instanceKlassHandle resolve_instance_klass(oop java_mirror_oop, TRAPS);
602 static instanceKlassHandle resolve_instance_klass(jclass java_mirror_jh, TRAPS) {
603 return resolve_instance_klass(JNIHandles::resolve(java_mirror_jh), THREAD);
604 }
606 private:
607 // These checkers operate on a pair of whole MethodTypes:
608 static const char* check_method_type_change(oop src_mtype, int src_beg, int src_end,
609 int insert_argnum, oop insert_type,
610 int change_argnum, oop change_type,
611 int delete_argnum,
612 oop dst_mtype, int dst_beg, int dst_end,
613 bool raw = false);
614 static const char* check_method_type_insertion(oop src_mtype,
615 int insert_argnum, oop insert_type,
616 oop dst_mtype) {
617 oop no_ref = NULL;
618 return check_method_type_change(src_mtype, 0, -1,
619 insert_argnum, insert_type,
620 -1, no_ref, -1, dst_mtype, 0, -1);
621 }
622 static const char* check_method_type_conversion(oop src_mtype,
623 int change_argnum, oop change_type,
624 oop dst_mtype) {
625 oop no_ref = NULL;
626 return check_method_type_change(src_mtype, 0, -1, -1, no_ref,
627 change_argnum, change_type,
628 -1, dst_mtype, 0, -1);
629 }
630 static const char* check_method_type_passthrough(oop src_mtype, oop dst_mtype, bool raw) {
631 oop no_ref = NULL;
632 return check_method_type_change(src_mtype, 0, -1,
633 -1, no_ref, -1, no_ref, -1,
634 dst_mtype, 0, -1, raw);
635 }
637 // These checkers operate on pairs of argument or return types:
638 static const char* check_argument_type_change(BasicType src_type, klassOop src_klass,
639 BasicType dst_type, klassOop dst_klass,
640 int argnum, bool raw = false);
642 static const char* check_argument_type_change(oop src_type, oop dst_type,
643 int argnum, bool raw = false) {
644 klassOop src_klass = NULL, dst_klass = NULL;
645 BasicType src_bt = java_lang_Class::as_BasicType(src_type, &src_klass);
646 BasicType dst_bt = java_lang_Class::as_BasicType(dst_type, &dst_klass);
647 return check_argument_type_change(src_bt, src_klass,
648 dst_bt, dst_klass, argnum, raw);
649 }
651 static const char* check_return_type_change(oop src_type, oop dst_type, bool raw = false) {
652 return check_argument_type_change(src_type, dst_type, -1, raw);
653 }
655 static const char* check_return_type_change(BasicType src_type, klassOop src_klass,
656 BasicType dst_type, klassOop dst_klass) {
657 return check_argument_type_change(src_type, src_klass, dst_type, dst_klass, -1);
658 }
660 static const char* check_method_receiver(methodOop m, klassOop passed_recv_type);
662 // These verifiers can block, and will throw an error if the checking fails:
663 static void verify_vmslots(Handle mh, TRAPS);
664 static void verify_vmargslot(Handle mh, int argnum, int argslot, TRAPS);
666 static void verify_method_type(methodHandle m, Handle mtype,
667 bool has_bound_oop,
668 KlassHandle bound_oop_type,
669 TRAPS);
671 static void verify_method_signature(methodHandle m, Handle mtype,
672 int first_ptype_pos,
673 KlassHandle insert_ptype, TRAPS);
675 static void verify_DirectMethodHandle(Handle mh, methodHandle m, TRAPS);
676 static void verify_BoundMethodHandle(Handle mh, Handle target, int argnum,
677 bool direct_to_method, TRAPS);
678 static void verify_BoundMethodHandle_with_receiver(Handle mh, methodHandle m, TRAPS);
679 static void verify_AdapterMethodHandle(Handle mh, int argnum, TRAPS);
681 public:
683 // Fill in the fields of a DirectMethodHandle mh. (MH.type must be pre-filled.)
684 static void init_DirectMethodHandle(Handle mh, methodHandle method, bool do_dispatch, TRAPS);
686 // Fill in the fields of a BoundMethodHandle mh. (MH.type, BMH.argument must be pre-filled.)
687 static void init_BoundMethodHandle(Handle mh, Handle target, int argnum, TRAPS);
688 static void init_BoundMethodHandle_with_receiver(Handle mh,
689 methodHandle original_m,
690 KlassHandle receiver_limit,
691 int decode_flags,
692 TRAPS);
694 // Fill in the fields of an AdapterMethodHandle mh. (MH.type must be pre-filled.)
695 static void init_AdapterMethodHandle(Handle mh, Handle target, int argnum, TRAPS);
696 static void ensure_vmlayout_field(Handle target, TRAPS);
698 #ifdef ASSERT
699 static bool spot_check_entry_names();
700 #endif
702 private:
703 static methodHandle dispatch_decoded_method(methodHandle m,
704 KlassHandle receiver_limit,
705 int decode_flags,
706 KlassHandle receiver_klass,
707 TRAPS);
709 public:
710 static bool is_float_fixed_reinterpretation_cast(BasicType src, BasicType dst);
711 static bool same_basic_type_for_arguments(BasicType src, BasicType dst,
712 bool raw = false,
713 bool for_return = false);
714 static bool same_basic_type_for_returns(BasicType src, BasicType dst, bool raw = false) {
715 return same_basic_type_for_arguments(src, dst, raw, true);
716 }
718 static Symbol* convert_to_signature(oop type_str, bool polymorphic, TRAPS);
720 #ifdef TARGET_ARCH_x86
721 # include "methodHandles_x86.hpp"
722 #endif
723 #ifdef TARGET_ARCH_sparc
724 # include "methodHandles_sparc.hpp"
725 #endif
726 #ifdef TARGET_ARCH_zero
727 # include "methodHandles_zero.hpp"
728 #endif
729 #ifdef TARGET_ARCH_arm
730 # include "methodHandles_arm.hpp"
731 #endif
732 #ifdef TARGET_ARCH_ppc
733 # include "methodHandles_ppc.hpp"
734 #endif
736 #ifdef TARGET_ARCH_NYI_6939861
737 // Here are some backward compatible declarations until the 6939861 ports are updated.
738 #define _adapter_flyby (_EK_LIMIT + 10)
739 #define _adapter_ricochet (_EK_LIMIT + 11)
740 #define _adapter_opt_spread_1 _adapter_opt_spread_1_ref
741 #define _adapter_opt_spread_more _adapter_opt_spread_ref
742 enum {
743 _INSERT_NO_MASK = -1,
744 _INSERT_REF_MASK = 0,
745 _INSERT_INT_MASK = 1,
746 _INSERT_LONG_MASK = 3
747 };
748 static void get_ek_bound_mh_info(EntryKind ek, BasicType& arg_type, int& arg_mask, int& arg_slots) {
749 arg_type = ek_bound_mh_arg_type(ek);
750 arg_mask = 0;
751 arg_slots = type2size[arg_type];;
752 }
753 static void get_ek_adapter_opt_swap_rot_info(EntryKind ek, int& swap_bytes, int& rotate) {
754 int swap_slots = ek_adapter_opt_swap_slots(ek);
755 rotate = ek_adapter_opt_swap_mode(ek);
756 swap_bytes = swap_slots * Interpreter::stackElementSize;
757 }
758 static int get_ek_adapter_opt_spread_info(EntryKind ek) {
759 return ek_adapter_opt_spread_count(ek);
760 }
762 static void insert_arg_slots(MacroAssembler* _masm,
763 RegisterOrConstant arg_slots,
764 int arg_mask,
765 Register argslot_reg,
766 Register temp_reg, Register temp2_reg, Register temp3_reg = noreg);
768 static void remove_arg_slots(MacroAssembler* _masm,
769 RegisterOrConstant arg_slots,
770 Register argslot_reg,
771 Register temp_reg, Register temp2_reg, Register temp3_reg = noreg);
773 static void trace_method_handle(MacroAssembler* _masm, const char* adaptername) PRODUCT_RETURN;
774 #endif //TARGET_ARCH_NYI_6939861
775 };
778 // Access methods for the "entry" field of a java.lang.invoke.MethodHandle.
779 // The field is primarily a jump target for compiled calls.
780 // However, we squirrel away some nice pointers for other uses,
781 // just before the jump target.
782 // Aspects of a method handle entry:
783 // - from_compiled_entry - stub used when compiled code calls the MH
784 // - from_interpreted_entry - stub used when the interpreter calls the MH
785 // - type_checking_entry - stub for runtime casting between MHForm siblings (NYI)
786 class MethodHandleEntry {
787 public:
788 class Data {
789 friend class MethodHandleEntry;
790 size_t _total_size; // size including Data and code stub
791 MethodHandleEntry* _type_checking_entry;
792 address _from_interpreted_entry;
793 MethodHandleEntry* method_entry() { return (MethodHandleEntry*)(this + 1); }
794 };
796 Data* data() { return (Data*)this - 1; }
798 address start_address() { return (address) data(); }
799 address end_address() { return start_address() + data()->_total_size; }
801 address from_compiled_entry() { return (address) this; }
803 address from_interpreted_entry() { return data()->_from_interpreted_entry; }
804 void set_from_interpreted_entry(address e) { data()->_from_interpreted_entry = e; }
806 MethodHandleEntry* type_checking_entry() { return data()->_type_checking_entry; }
807 void set_type_checking_entry(MethodHandleEntry* e) { data()->_type_checking_entry = e; }
809 void set_end_address(address end_addr) {
810 size_t total_size = end_addr - start_address();
811 assert(total_size > 0 && total_size < 0x1000, "reasonable end address");
812 data()->_total_size = total_size;
813 }
815 // Compiler support:
816 static int from_interpreted_entry_offset_in_bytes() {
817 return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) );
818 }
819 static int type_checking_entry_offset_in_bytes() {
820 return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) );
821 }
823 static address start_compiled_entry(MacroAssembler* _masm,
824 address interpreted_entry = NULL);
825 static MethodHandleEntry* finish_compiled_entry(MacroAssembler* masm, address start_addr);
826 };
828 address MethodHandles::from_compiled_entry(EntryKind ek) { return entry(ek)->from_compiled_entry(); }
829 address MethodHandles::from_interpreted_entry(EntryKind ek) { return entry(ek)->from_interpreted_entry(); }
832 //------------------------------------------------------------------------------
833 // MethodHandlesAdapterGenerator
834 //
835 class MethodHandlesAdapterGenerator : public StubCodeGenerator {
836 public:
837 MethodHandlesAdapterGenerator(CodeBuffer* code) : StubCodeGenerator(code, PrintMethodHandleStubs) {}
839 void generate();
840 };
842 #endif // SHARE_VM_PRIMS_METHODHANDLES_HPP
