1 /*
2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * @summary verify Lookup.revealDirect on a variety of input handles
27 * @modules java.base/sun.reflect
28 * @compile -XDignore.symbol.file RevealDirectTest.java
29 * @run junit/othervm -ea -esa test.java.lang.invoke.RevealDirectTest
30 *
31 * @test
32 * @summary verify Lookup.revealDirect on a variety of input handles, with security manager
33 * @run main/othervm/policy=jtreg.security.policy/secure=java.lang.SecurityManager -ea -esa test.java.lang.invoke.RevealDirectTest
34 */
35
36 /* To run manually:
37 * $ $JAVA8X_HOME/bin/javac -cp $JUNIT4_JAR -d ../../../.. -XDignore.symbol.file RevealDirectTest.java
38 * $ $JAVA8X_HOME/bin/java -cp $JUNIT4_JAR:../../../.. -ea -esa org.junit.runner.JUnitCore test.java.lang.invoke.RevealDirectTest
39 * $ $JAVA8X_HOME/bin/java -cp $JUNIT4_JAR:../../../.. -ea -esa -Djava.security.manager test.java.lang.invoke.RevealDirectTest
40 */
41
42 package test.java.lang.invoke;
43
44 import java.lang.reflect.*;
45 import java.lang.invoke.*;
46 import static java.lang.invoke.MethodHandles.*;
47 import static java.lang.invoke.MethodType.*;
48 import static java.lang.invoke.MethodHandleInfo.*;
49 import java.util.*;
50 import static org.junit.Assert.*;
51 import org.junit.*;
52
53 public class RevealDirectTest {
54 public static void main(String... av) throws Throwable {
55 // Run the @Test methods explicitly, in case we don't want to use the JUnitCore driver.
56 // This appears to be necessary when running with a security manager.
57 Throwable fail = null;
58 for (Method test : RevealDirectTest.class.getDeclaredMethods()) {
59 if (!test.isAnnotationPresent(Test.class)) continue;
60 try {
61 test.invoke(new RevealDirectTest());
62 } catch (Throwable ex) {
63 if (ex instanceof InvocationTargetException)
64 ex = ex.getCause();
65 if (fail == null) fail = ex;
66 System.out.println("Testcase: "+test.getName()
67 +"("+test.getDeclaringClass().getName()
68 +"):\tCaused an ERROR");
69 System.out.println(ex);
70 ex.printStackTrace(System.out);
71 }
72 }
73 if (fail != null) throw fail;
74 }
75
76 public interface SimpleSuperInterface {
77 public abstract int getInt();
78 public static void printAll(String... args) {
79 System.out.println(Arrays.toString(args));
80 }
81 public int NICE_CONSTANT = 42;
82 }
83 public interface SimpleInterface extends SimpleSuperInterface {
84 default float getFloat() { return getInt(); }
85 public static void printAll(String[] args) {
86 System.out.println(Arrays.toString(args));
87 }
88 }
89 public static class Simple implements SimpleInterface, Cloneable {
90 public int intField;
91 public final int finalField;
92 private static String stringField;
93 public int getInt() { return NICE_CONSTANT; }
94 private static Number getNum() { return 804; }
95 public Simple clone() {
96 try {
97 return (Simple) super.clone();
98 } catch (CloneNotSupportedException ex) {
99 throw new RuntimeException(ex);
100 }
101 }
102 Simple() { finalField = -NICE_CONSTANT; }
103 private static Lookup localLookup() { return lookup(); }
104 private static List<Member> members() { return getMembers(lookup().lookupClass()); };
105 }
106 static class Nestmate {
107 private static Lookup localLookup() { return lookup(); }
108 }
109
110 static boolean VERBOSE = false;
111
112 @Test public void testSimple() throws Throwable {
113 if (VERBOSE) System.out.println("@Test testSimple");
114 testOnMembers("testSimple", Simple.members(), Simple.localLookup());
115 }
116 @Test public void testPublicLookup() throws Throwable {
117 if (VERBOSE) System.out.println("@Test testPublicLookup");
118 List<Member> mems = publicOnly(Simple.members());
119 Lookup pubLookup = publicLookup(), privLookup = Simple.localLookup();
120 testOnMembers("testPublicLookup/1", mems, pubLookup);
121 // reveal using publicLookup:
122 testOnMembers("testPublicLookup/2", mems, privLookup, pubLookup);
123 // lookup using publicLookup, but reveal using private:
124 testOnMembers("testPublicLookup/3", mems, pubLookup, privLookup);
125 }
126 @Test public void testPublicLookupNegative() throws Throwable {
127 if (VERBOSE) System.out.println("@Test testPublicLookupNegative");
128 List<Member> mems = nonPublicOnly(Simple.members());
129 Lookup pubLookup = publicLookup(), privLookup = Simple.localLookup();
130 testOnMembersNoLookup("testPublicLookupNegative/1", mems, pubLookup);
131 testOnMembersNoReveal("testPublicLookupNegative/2", mems, privLookup, pubLookup);
132 testOnMembersNoReflect("testPublicLookupNegative/3", mems, privLookup, pubLookup);
133 }
134 @Test public void testJavaLangClass() throws Throwable {
135 if (VERBOSE) System.out.println("@Test testJavaLangClass");
136 List<Member> mems = callerSensitive(false, publicOnly(getMembers(Class.class)));
137 mems = limit(20, mems);
138 testOnMembers("testJavaLangClass", mems, Simple.localLookup());
139 }
140 @Test public void testCallerSensitive() throws Throwable {
141 if (VERBOSE) System.out.println("@Test testCallerSensitive");
142 List<Member> mems = union(getMembers(MethodHandles.class, "lookup"),
143 getMembers(Method.class, "invoke"),
144 getMembers(Field.class, "get", "set", "getLong"),
145 getMembers(Class.class));
146 mems = callerSensitive(true, publicOnly(mems));
147 mems = limit(10, mems);
148 testOnMembers("testCallerSensitive", mems, Simple.localLookup());
149 }
150 @Test public void testCallerSensitiveNegative() throws Throwable {
151 if (VERBOSE) System.out.println("@Test testCallerSensitiveNegative");
152 List<Member> mems = union(getMembers(MethodHandles.class, "lookup"),
153 getMembers(Class.class, "forName"),
154 getMembers(Method.class, "invoke"));
155 mems = callerSensitive(true, publicOnly(mems));
156 // CS methods cannot be looked up with publicLookup
157 testOnMembersNoLookup("testCallerSensitiveNegative/1", mems, publicLookup());
158 // CS methods have to be revealed with a matching lookupClass
159 testOnMembersNoReveal("testCallerSensitiveNegative/2", mems, Simple.localLookup(), publicLookup());
160 testOnMembersNoReveal("testCallerSensitiveNegative/3", mems, Simple.localLookup(), Nestmate.localLookup());
161 }
162 @Test public void testMethodHandleNatives() throws Throwable {
163 if (VERBOSE) System.out.println("@Test testMethodHandleNatives");
164 List<Member> mems = getMembers(MethodHandle.class, "invoke", "invokeExact");
165 testOnMembers("testMethodHandleNatives", mems, Simple.localLookup());
166 }
167 @Test public void testMethodHandleInvokes() throws Throwable {
168 if (VERBOSE) System.out.println("@Test testMethodHandleInvokes");
169 List<MethodType> types = new ArrayList<>();
170 Class<?>[] someParamTypes = { void.class, int.class, Object.class, Object[].class };
171 for (Class<?> rt : someParamTypes) {
172 for (Class<?> p0 : someParamTypes) {
173 if (p0 == void.class) { types.add(methodType(rt)); continue; }
174 for (Class<?> p1 : someParamTypes) {
175 if (p1 == void.class) { types.add(methodType(rt, p0)); continue; }
176 for (Class<?> p2 : someParamTypes) {
177 if (p2 == void.class) { types.add(methodType(rt, p0, p1)); continue; }
178 types.add(methodType(rt, p0, p1, p2));
179 }
180 }
181 }
182 }
183 List<Member> mems = union(getPolyMembers(MethodHandle.class, "invoke", types),
184 getPolyMembers(MethodHandle.class, "invokeExact", types));
185 testOnMembers("testMethodHandleInvokes/1", mems, Simple.localLookup());
186 testOnMembers("testMethodHandleInvokes/2", mems, publicLookup());
187 }
188
189 static List<Member> getPolyMembers(Class<?> cls, String name, List<MethodType> types) {
190 assert(cls == MethodHandle.class);
191 ArrayList<Member> mems = new ArrayList<>();
192 for (MethodType type : types) {
193 mems.add(new SignaturePolymorphicMethod(name, type));
194 }
195 return mems;
196 }
197 static List<Member> getMembers(Class<?> cls) {
198 return getMembers(cls, (String[]) null);
199 }
200 static List<Member> getMembers(Class<?> cls, String... onlyNames) {
201 List<String> names = (onlyNames == null || onlyNames.length == 0 ? null : Arrays.asList(onlyNames));
202 ArrayList<Member> res = new ArrayList<>();
203 for (Class<?> sup : getSupers(cls)) {
204 res.addAll(getDeclaredMembers(sup, "getDeclaredFields"));
205 res.addAll(getDeclaredMembers(sup, "getDeclaredMethods"));
206 res.addAll(getDeclaredMembers(sup, "getDeclaredConstructors"));
207 }
208 res = new ArrayList<>(new LinkedHashSet<>(res));
209 for (int i = 0; i < res.size(); i++) {
210 Member mem = res.get(i);
211 if (!canBeReached(mem, cls) ||
212 res.indexOf(mem) != i ||
213 mem.isSynthetic() ||
214 (names != null && !names.contains(mem.getName()))
215 ) {
216 res.remove(i--);
217 }
218 }
219 return res;
220 }
221 static List<Class<?>> getSupers(Class<?> cls) {
222 ArrayList<Class<?>> res = new ArrayList<>();
223 ArrayList<Class<?>> intfs = new ArrayList<>();
224 for (Class<?> sup = cls; sup != null; sup = sup.getSuperclass()) {
225 res.add(sup);
226 for (Class<?> intf : cls.getInterfaces()) {
227 if (!intfs.contains(intf))
228 intfs.add(intf);
229 }
230 }
231 for (int i = 0; i < intfs.size(); i++) {
232 for (Class<?> intf : intfs.get(i).getInterfaces()) {
233 if (!intfs.contains(intf))
234 intfs.add(intf);
235 }
236 }
237 res.addAll(intfs);
238 //System.out.println("getSupers => "+res);
239 return res;
240 }
241 static boolean hasSM() {
242 return (System.getSecurityManager() != null);
243 }
244 static List<Member> getDeclaredMembers(Class<?> cls, String accessor) {
245 Member[] mems = {};
246 Method getter = getMethod(Class.class, accessor);
247 if (hasSM()) {
248 try {
249 mems = (Member[]) invokeMethod(getter, cls);
250 } catch (SecurityException ex) {
251 //if (VERBOSE) ex.printStackTrace();
252 accessor = accessor.replace("Declared", "");
253 getter = getMethod(Class.class, accessor);
254 if (VERBOSE) System.out.println("replaced accessor: "+getter);
255 }
256 }
257 if (mems.length == 0) {
258 try {
259 mems = (Member[]) invokeMethod(getter, cls);
260 } catch (SecurityException ex) {
261 ex.printStackTrace();
262 }
263 }
264 if (VERBOSE) System.out.println(accessor+" "+cls.getName()+" => "+mems.length+" members");
265 return Arrays.asList(mems);
266 }
267 static Method getMethod(Class<?> cls, String name) {
268 try {
269 return cls.getMethod(name);
270 } catch (ReflectiveOperationException ex) {
271 throw new AssertionError(ex);
272 }
273 }
274 static Object invokeMethod(Method m, Object recv, Object... args) {
275 try {
276 return m.invoke(recv, args);
277 } catch (InvocationTargetException ex) {
278 Throwable ex2 = ex.getCause();
279 if (ex2 instanceof RuntimeException) throw (RuntimeException) ex2;
280 if (ex2 instanceof Error) throw (Error) ex2;
281 throw new AssertionError(ex);
282 } catch (ReflectiveOperationException ex) {
283 throw new AssertionError(ex);
284 }
285 }
286
287 static List<Member> limit(int len, List<Member> mems) {
288 if (mems.size() <= len) return mems;
289 return mems.subList(0, len);
290 }
291 @SafeVarargs
292 static List<Member> union(List<Member> mems, List<Member>... mem2s) {
293 for (List<Member> mem2 : mem2s) {
294 for (Member m : mem2) {
295 if (!mems.contains(m))
296 mems.add(m);
297 }
298 }
299 return mems;
300 }
301 static List<Member> callerSensitive(boolean cond, List<Member> members) {
302 for (Iterator<Member> i = members.iterator(); i.hasNext(); ) {
303 Member mem = i.next();
304 if (isCallerSensitive(mem) != cond)
305 i.remove();
306 }
307 if (members.isEmpty()) throw new AssertionError("trivial result");
308 return members;
309 }
310 static boolean isCallerSensitive(Member mem) {
311 if (!(mem instanceof AnnotatedElement)) return false;
312 AnnotatedElement ae = (AnnotatedElement) mem;
313 if (CS_CLASS != null)
314 return ae.isAnnotationPresent(sun.reflect.CallerSensitive.class);
315 for (java.lang.annotation.Annotation a : ae.getDeclaredAnnotations()) {
316 if (a.toString().contains(".CallerSensitive"))
317 return true;
318 }
319 return false;
320 }
321 static final Class<?> CS_CLASS;
322 static {
323 Class<?> c = null;
324 try {
325 c = sun.reflect.CallerSensitive.class;
326 } catch (SecurityException | LinkageError ex) {
327 }
328 CS_CLASS = c;
329 }
330 static List<Member> publicOnly(List<Member> members) {
331 return removeMods(members, Modifier.PUBLIC, 0);
332 }
333 static List<Member> nonPublicOnly(List<Member> members) {
334 return removeMods(members, Modifier.PUBLIC, -1);
335 }
336 static List<Member> removeMods(List<Member> members, int mask, int bits) {
337 int publicMods = (mask & Modifier.PUBLIC);
338 members = new ArrayList<>(members);
339 for (Iterator<Member> i = members.iterator(); i.hasNext(); ) {
340 Member mem = i.next();
341 int mods = mem.getModifiers();
342 if ((publicMods & mods) != 0 &&
343 (publicMods & mem.getDeclaringClass().getModifiers()) == 0)
344 mods -= publicMods;
345 if ((mods & mask) == (bits & mask))
346 i.remove();
347 }
348 return members;
349 }
350
351 void testOnMembers(String tname, List<Member> mems, Lookup lookup, Lookup... lookups) throws Throwable {
352 if (VERBOSE) System.out.println("testOnMembers "+mems);
353 Lookup revLookup = (lookups.length > 0) ? lookups[0] : null;
354 if (revLookup == null) revLookup = lookup;
355 Lookup refLookup = (lookups.length > 1) ? lookups[1] : null;
356 if (refLookup == null) refLookup = lookup;
357 assert(lookups.length <= 2);
358 testOnMembersImpl(tname, mems, lookup, revLookup, refLookup, NO_FAIL);
359 }
360 void testOnMembersNoLookup(String tname, List<Member> mems, Lookup lookup) throws Throwable {
361 if (VERBOSE) System.out.println("testOnMembersNoLookup "+mems);
362 testOnMembersImpl(tname, mems, lookup, null, null, FAIL_LOOKUP);
363 }
364 void testOnMembersNoReveal(String tname, List<Member> mems,
365 Lookup lookup, Lookup negLookup) throws Throwable {
366 if (VERBOSE) System.out.println("testOnMembersNoReveal "+mems);
367 testOnMembersImpl(tname, mems, lookup, negLookup, null, FAIL_REVEAL);
368 }
369 void testOnMembersNoReflect(String tname, List<Member> mems,
370 Lookup lookup, Lookup negLookup) throws Throwable {
371 if (VERBOSE) System.out.println("testOnMembersNoReflect "+mems);
372 testOnMembersImpl(tname, mems, lookup, lookup, negLookup, FAIL_REFLECT);
373 }
374 void testOnMembersImpl(String tname, List<Member> mems,
375 Lookup lookup,
376 Lookup revLookup,
377 Lookup refLookup,
378 int failureMode) throws Throwable {
379 Throwable fail = null;
380 int failCount = 0;
381 failureModeCounts = new int[FAIL_MODE_COUNT];
382 long tm0 = System.currentTimeMillis();
383 for (Member mem : mems) {
384 try {
385 testWithMember(mem, lookup, revLookup, refLookup, failureMode);
386 } catch (Throwable ex) {
387 if (fail == null) fail = ex;
388 if (++failCount > 10) { System.out.println("*** FAIL: too many failures"); break; }
389 System.out.println("*** FAIL: "+mem+" => "+ex);
390 if (VERBOSE) ex.printStackTrace(System.out);
391 }
392 }
393 long tm1 = System.currentTimeMillis();
394 System.out.printf("@Test %s executed %s tests in %d ms",
395 tname, testKinds(failureModeCounts), (tm1-tm0)).println();
396 if (fail != null) throw fail;
397 }
398 static String testKinds(int[] modes) {
399 int pos = modes[0], neg = -pos;
400 for (int n : modes) neg += n;
401 if (neg == 0) return pos + " positive";
402 String negs = "";
403 for (int n : modes) negs += "/"+n;
404 negs = negs.replaceFirst("/"+pos+"/", "");
405 negs += " negative";
406 if (pos == 0) return negs;
407 return pos + " positive, " + negs;
408 }
409 static class SignaturePolymorphicMethod implements Member { // non-reflected instance of MH.invoke*
410 final String name;
411 final MethodType type;
412 SignaturePolymorphicMethod(String name, MethodType type) {
413 this.name = name;
414 this.type = type;
415 }
416 public String toString() {
417 String typeStr = type.toString();
418 if (isVarArgs()) typeStr = typeStr.replaceFirst("\\[\\])$", "...)");
419 return (Modifier.toString(getModifiers())
420 +typeStr.substring(0, typeStr.indexOf('('))+" "
421 +getDeclaringClass().getTypeName()+"."
422 +getName()+typeStr.substring(typeStr.indexOf('(')));
423 }
424 public boolean equals(Object x) {
425 return (x instanceof SignaturePolymorphicMethod && equals((SignaturePolymorphicMethod)x));
426 }
427 public boolean equals(SignaturePolymorphicMethod that) {
428 return this.name.equals(that.name) && this.type.equals(that.type);
429 }
430 public int hashCode() {
431 return name.hashCode() * 31 + type.hashCode();
432 }
433 public Class<?> getDeclaringClass() { return MethodHandle.class; }
434 public String getName() { return name; }
435 public MethodType getMethodType() { return type; }
436 public int getModifiers() { return Modifier.PUBLIC | Modifier.FINAL | Modifier.NATIVE | SYNTHETIC; }
437 public boolean isVarArgs() { return Modifier.isTransient(getModifiers()); }
438 public boolean isSynthetic() { return true; }
439 public Class<?> getReturnType() { return type.returnType(); }
440 public Class<?>[] getParameterTypes() { return type.parameterArray(); }
441 static final int SYNTHETIC = 0x00001000;
442 }
443 static class UnreflectResult { // a tuple
444 final MethodHandle mh;
445 final Throwable ex;
446 final byte kind;
447 final Member mem;
448 final int var;
449 UnreflectResult(MethodHandle mh, byte kind, Member mem, int var) {
450 this.mh = mh;
451 this.ex = null;
452 this.kind = kind;
453 this.mem = mem;
454 this.var = var;
455 }
456 UnreflectResult(Throwable ex, byte kind, Member mem, int var) {
457 this.mh = null;
458 this.ex = ex;
459 this.kind = kind;
460 this.mem = mem;
461 this.var = var;
462 }
463 public String toString() {
464 return toInfoString()+"/v"+var;
465 }
466 public String toInfoString() {
467 return String.format("%s %s.%s:%s", MethodHandleInfo.referenceKindToString(kind),
468 mem.getDeclaringClass().getName(), name(mem), type(mem, kind));
469 }
470 static String name(Member mem) {
471 if (mem instanceof Constructor) return "<init>";
472 return mem.getName();
473 }
474 static MethodType type(Member mem, byte kind) {
475 if (mem instanceof Field) {
476 Class<?> type = ((Field)mem).getType();
477 if (kind == REF_putStatic || kind == REF_putField)
478 return methodType(void.class, type);
479 return methodType(type);
480 } else if (mem instanceof SignaturePolymorphicMethod) {
481 return ((SignaturePolymorphicMethod)mem).getMethodType();
482 }
483 Class<?>[] params = ((Executable)mem).getParameterTypes();
484 if (mem instanceof Constructor)
485 return methodType(void.class, params);
486 Class<?> type = ((Method)mem).getReturnType();
487 return methodType(type, params);
488 }
489 }
490 static UnreflectResult unreflectMember(Lookup lookup, Member mem, int variation) {
491 byte[] refKind = {0};
492 try {
493 return unreflectMemberOrThrow(lookup, mem, variation, refKind);
494 } catch (ReflectiveOperationException|SecurityException ex) {
495 return new UnreflectResult(ex, refKind[0], mem, variation);
496 }
497 }
498 static UnreflectResult unreflectMemberOrThrow(Lookup lookup, Member mem, int variation,
499 byte[] refKind) throws ReflectiveOperationException {
500 Class<?> cls = lookup.lookupClass();
501 Class<?> defc = mem.getDeclaringClass();
502 String name = mem.getName();
503 int mods = mem.getModifiers();
504 boolean isStatic = Modifier.isStatic(mods);
505 MethodHandle mh = null;
506 byte kind = 0;
507 if (mem instanceof Method) {
508 Method m = (Method) mem;
509 MethodType type = methodType(m.getReturnType(), m.getParameterTypes());
510 boolean canBeSpecial = (!isStatic &&
511 (lookup.lookupModes() & Modifier.PRIVATE) != 0 &&
512 defc.isAssignableFrom(cls) &&
513 (!defc.isInterface() || Arrays.asList(cls.getInterfaces()).contains(defc)));
514 if (variation >= 2)
515 kind = REF_invokeSpecial;
516 else if (isStatic)
517 kind = REF_invokeStatic;
518 else if (defc.isInterface())
519 kind = REF_invokeInterface;
520 else
521 kind = REF_invokeVirtual;
522 refKind[0] = kind;
523 switch (variation) {
524 case 0:
525 mh = lookup.unreflect(m);
526 break;
527 case 1:
528 if (defc == MethodHandle.class &&
529 !isStatic &&
530 m.isVarArgs() &&
531 Modifier.isFinal(mods) &&
532 Modifier.isNative(mods)) {
533 break;
534 }
535 if (isStatic)
536 mh = lookup.findStatic(defc, name, type);
537 else
538 mh = lookup.findVirtual(defc, name, type);
539 break;
540 case 2:
541 if (!canBeSpecial)
542 break;
543 mh = lookup.unreflectSpecial(m, lookup.lookupClass());
544 break;
545 case 3:
546 if (!canBeSpecial)
547 break;
548 mh = lookup.findSpecial(defc, name, type, lookup.lookupClass());
549 break;
550 }
551 } else if (mem instanceof SignaturePolymorphicMethod) {
552 SignaturePolymorphicMethod m = (SignaturePolymorphicMethod) mem;
553 MethodType type = methodType(m.getReturnType(), m.getParameterTypes());
554 kind = REF_invokeVirtual;
555 refKind[0] = kind;
556 switch (variation) {
557 case 0:
558 mh = lookup.findVirtual(defc, name, type);
559 break;
560 }
561 } else if (mem instanceof Constructor) {
562 name = "<init>"; // not used
563 Constructor<?> m = (Constructor<?>) mem;
564 MethodType type = methodType(void.class, m.getParameterTypes());
565 kind = REF_newInvokeSpecial;
566 refKind[0] = kind;
567 switch (variation) {
568 case 0:
569 mh = lookup.unreflectConstructor(m);
570 break;
571 case 1:
572 mh = lookup.findConstructor(defc, type);
573 break;
574 }
575 } else if (mem instanceof Field) {
576 Field m = (Field) mem;
577 Class<?> type = m.getType();
578 boolean canHaveSetter = !Modifier.isFinal(mods);
579 if (variation >= 2)
580 kind = (byte)(isStatic ? REF_putStatic : REF_putField);
581 else
582 kind = (byte)(isStatic ? REF_getStatic : REF_getField);
583 refKind[0] = kind;
584 switch (variation) {
585 case 0:
586 mh = lookup.unreflectGetter(m);
587 break;
588 case 1:
589 if (isStatic)
590 mh = lookup.findStaticGetter(defc, name, type);
591 else
592 mh = lookup.findGetter(defc, name, type);
593 break;
594 case 3:
595 if (!canHaveSetter)
596 break;
597 mh = lookup.unreflectSetter(m);
598 break;
599 case 2:
600 if (!canHaveSetter)
601 break;
602 if (isStatic)
603 mh = lookup.findStaticSetter(defc, name, type);
604 else
605 mh = lookup.findSetter(defc, name, type);
606 break;
607 }
608 } else {
609 throw new IllegalArgumentException(String.valueOf(mem));
610 }
611 if (mh == null)
612 // ran out of valid variations; return null to caller
613 return null;
614 return new UnreflectResult(mh, kind, mem, variation);
615 }
616 static boolean canBeReached(Member mem, Class<?> cls) {
617 Class<?> defc = mem.getDeclaringClass();
618 String name = mem.getName();
619 int mods = mem.getModifiers();
620 if (mem instanceof Constructor) {
621 name = "<init>"; // according to 292 spec.
622 }
623 if (defc == cls)
624 return true;
625 if (name.startsWith("<"))
626 return false; // only my own constructors
627 if (Modifier.isPrivate(mods))
628 return false; // only my own constructors
629 if (defc.getPackage() == cls.getPackage())
630 return true; // package access or greater OK
631 if (Modifier.isPublic(mods))
632 return true; // publics always OK
633 if (Modifier.isProtected(mods) && defc.isAssignableFrom(cls))
634 return true; // protected OK
635 return false;
636 }
637 static boolean consistent(UnreflectResult res, MethodHandleInfo info) {
638 assert(res.mh != null);
639 assertEquals(res.kind, info.getReferenceKind());
640 assertEquals(res.mem.getModifiers(), info.getModifiers());
641 assertEquals(res.mem.getDeclaringClass(), info.getDeclaringClass());
642 String expectName = res.mem.getName();
643 if (res.kind == REF_newInvokeSpecial)
644 expectName = "<init>";
645 assertEquals(expectName, info.getName());
646 MethodType expectType = res.mh.type();
647 if ((res.kind & 1) == (REF_getField & 1))
648 expectType = expectType.dropParameterTypes(0, 1);
649 if (res.kind == REF_newInvokeSpecial)
650 expectType = expectType.changeReturnType(void.class);
651 assertEquals(expectType, info.getMethodType());
652 assertEquals(res.mh.isVarargsCollector(), isVarArgs(info));
653 assertEquals(res.toInfoString(), info.toString());
654 assertEquals(res.toInfoString(), MethodHandleInfo.toString(info.getReferenceKind(), info.getDeclaringClass(), info.getName(), info.getMethodType()));
655 return true;
656 }
657 static boolean isVarArgs(MethodHandleInfo info) {
658 return info.isVarArgs();
659 }
660 static boolean consistent(Member mem, Member mem2) {
661 assertEquals(mem, mem2);
662 return true;
663 }
664 static boolean consistent(MethodHandleInfo info, MethodHandleInfo info2) {
665 assertEquals(info.getReferenceKind(), info2.getReferenceKind());
666 assertEquals(info.getModifiers(), info2.getModifiers());
667 assertEquals(info.getDeclaringClass(), info2.getDeclaringClass());
668 assertEquals(info.getName(), info2.getName());
669 assertEquals(info.getMethodType(), info2.getMethodType());
670 assertEquals(isVarArgs(info), isVarArgs(info));
671 return true;
672 }
673 static boolean consistent(MethodHandle mh, MethodHandle mh2) {
674 assertEquals(mh.type(), mh2.type());
675 assertEquals(mh.isVarargsCollector(), mh2.isVarargsCollector());
676 return true;
677 }
678 int[] failureModeCounts;
679 static final int NO_FAIL=0, FAIL_LOOKUP=1, FAIL_REVEAL=2, FAIL_REFLECT=3, FAIL_MODE_COUNT=4;
680 void testWithMember(Member mem,
681 Lookup lookup, // initial lookup of member => MH
682 Lookup revLookup, // reveal MH => info
683 Lookup refLookup, // reflect info => member
684 int failureMode) throws Throwable {
685 boolean expectEx1 = (failureMode == FAIL_LOOKUP); // testOnMembersNoLookup
686 boolean expectEx2 = (failureMode == FAIL_REVEAL); // testOnMembersNoReveal
687 boolean expectEx3 = (failureMode == FAIL_REFLECT); // testOnMembersNoReflect
688 for (int variation = 0; ; variation++) {
689 UnreflectResult res = unreflectMember(lookup, mem, variation);
690 failureModeCounts[failureMode] += 1;
691 if (variation == 0) assert(res != null);
692 if (res == null) break;
693 if (VERBOSE && variation == 0)
694 System.out.println("from "+mem.getDeclaringClass().getSimpleName());
695 MethodHandle mh = res.mh;
696 Throwable ex1 = res.ex;
697 if (VERBOSE) System.out.println(" "+variation+": "+res+" << "+(mh != null ? mh : ex1));
698 if (expectEx1 && ex1 != null)
699 continue; // this is OK; we expected that lookup to fail
700 if (expectEx1)
701 throw new AssertionError("unexpected lookup for negative test");
702 if (ex1 != null && !expectEx1) {
703 if (failureMode != NO_FAIL)
704 throw new AssertionError("unexpected lookup failure for negative test", ex1);
705 throw ex1;
706 }
707 MethodHandleInfo info;
708 try {
709 info = revLookup.revealDirect(mh);
710 if (expectEx2) throw new AssertionError("unexpected revelation for negative test");
711 } catch (IllegalArgumentException|SecurityException ex2) {
712 if (VERBOSE) System.out.println(" "+variation+": "+res+" => "+mh.getClass().getName()+" => (EX2)"+ex2);
713 if (expectEx2)
714 continue; // this is OK; we expected the reflect to fail
715 if (failureMode != NO_FAIL)
716 throw new AssertionError("unexpected revelation failure for negative test", ex2);
717 throw ex2;
718 }
719 assert(consistent(res, info));
720 Member mem2;
721 try {
722 mem2 = info.reflectAs(Member.class, refLookup);
723 if (expectEx3) throw new AssertionError("unexpected reflection for negative test");
724 assert(!(mem instanceof SignaturePolymorphicMethod));
725 } catch (IllegalArgumentException ex3) {
726 if (VERBOSE) System.out.println(" "+variation+": "+info+" => (EX3)"+ex3);
727 if (expectEx3)
728 continue; // this is OK; we expected the reflect to fail
729 if (mem instanceof SignaturePolymorphicMethod)
730 continue; // this is OK; we cannot reflect MH.invokeExact(a,b,c)
731 if (failureMode != NO_FAIL)
732 throw new AssertionError("unexpected reflection failure for negative test", ex3);
733 throw ex3;
734 }
735 assert(consistent(mem, mem2));
736 UnreflectResult res2 = unreflectMember(lookup, mem2, variation);
737 MethodHandle mh2 = res2.mh;
738 assert(consistent(mh, mh2));
739 MethodHandleInfo info2 = lookup.revealDirect(mh2);
740 assert(consistent(info, info2));
741 assert(consistent(res, info2));
742 Member mem3;
743 if (hasSM())
744 mem3 = info2.reflectAs(Member.class, lookup);
745 else
746 mem3 = MethodHandles.reflectAs(Member.class, mh2);
747 assert(consistent(mem2, mem3));
748 if (hasSM()) {
749 try {
750 MethodHandles.reflectAs(Member.class, mh2);
751 throw new AssertionError("failed to throw on "+mem3);
752 } catch (SecurityException ex3) {
753 // OK...
754 }
755 }
756 }
757 }
758 }