1 /*
2 * Copyright (c) 2009, 2015, 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 /* @test
25 * @summary unit tests for java.lang.invoke.MethodHandles
26 * @library /lib/testlibrary /lib/testlibrary/jsr292
27 * @compile MethodHandlesTest.java remote/RemoteExample.java
28 * @run junit/othervm/timeout=2500 -XX:+IgnoreUnrecognizedVMOptions -XX:-VerifyDependencies -esa test.java.lang.invoke.MethodHandlesTest
29 */
30
31 package test.java.lang.invoke;
32
33 import test.java.lang.invoke.remote.RemoteExample;
34 import java.lang.invoke.*;
35 import static java.lang.invoke.MethodType.methodType;
36 import java.lang.invoke.MethodHandles.Lookup;
37 import java.lang.reflect.*;
38 import java.util.*;
39 import org.junit.*;
40 import static org.junit.Assert.*;
41 import com.oracle.testlibrary.jsr292.CodeCacheOverflowProcessor;
42
43
44 /**
45 *
46 * @author jrose
47 */
48 public class MethodHandlesTest {
49 static final Class<?> THIS_CLASS = MethodHandlesTest.class;
50 // How much output?
51 static int verbosity = 0;
52 static {
53 String vstr = System.getProperty(THIS_CLASS.getSimpleName()+".verbosity");
54 if (vstr == null)
55 vstr = System.getProperty(THIS_CLASS.getName()+".verbosity");
56 if (vstr != null) verbosity = Integer.parseInt(vstr);
57 }
58
59 // Set this true during development if you want to fast-forward to
60 // a particular new, non-working test. Tests which are known to
61 // work (or have recently worked) test this flag and return on true.
62 static final boolean CAN_SKIP_WORKING;
63 static {
64 String vstr = System.getProperty(THIS_CLASS.getSimpleName()+".CAN_SKIP_WORKING");
65 if (vstr == null)
66 vstr = System.getProperty(THIS_CLASS.getName()+".CAN_SKIP_WORKING");
67 CAN_SKIP_WORKING = Boolean.parseBoolean(vstr);
68 }
69
70 // Set 'true' to do about 15x fewer tests, especially those redundant with RicochetTest.
71 // This might be useful with -Xcomp stress tests that compile all method handles.
72 static boolean CAN_TEST_LIGHTLY = Boolean.getBoolean(THIS_CLASS.getName()+".CAN_TEST_LIGHTLY");
73
74 @Test
75 public void testFirst() throws Throwable {
76 verbosity += 9; try {
77 // left blank for debugging
78 } finally { printCounts(); verbosity -= 9; }
79 }
80
81 static final int MAX_ARG_INCREASE = 3;
82
83 public MethodHandlesTest() {
84 }
85
86 String testName;
87 static int allPosTests, allNegTests;
88 int posTests, negTests;
89 @After
90 public void printCounts() {
91 if (verbosity >= 2 && (posTests | negTests) != 0) {
92 System.out.println();
93 if (posTests != 0) System.out.println("=== "+testName+": "+posTests+" positive test cases run");
94 if (negTests != 0) System.out.println("=== "+testName+": "+negTests+" negative test cases run");
95 allPosTests += posTests;
96 allNegTests += negTests;
97 posTests = negTests = 0;
98 }
99 }
100 void countTest(boolean positive) {
101 if (positive) ++posTests;
102 else ++negTests;
103 }
104 void countTest() { countTest(true); }
105 void startTest(String name) {
106 if (testName != null) printCounts();
107 if (verbosity >= 1)
108 System.out.println(name);
109 posTests = negTests = 0;
110 testName = name;
111 }
112
113 @BeforeClass
114 public static void setUpClass() throws Exception {
115 calledLog.clear();
116 calledLog.add(null);
117 nextArgVal = INITIAL_ARG_VAL;
118 }
119
120 @AfterClass
121 public static void tearDownClass() throws Exception {
122 int posTests = allPosTests, negTests = allNegTests;
123 if (verbosity >= 0 && (posTests | negTests) != 0) {
124 System.out.println();
125 if (posTests != 0) System.out.println("=== "+posTests+" total positive test cases");
126 if (negTests != 0) System.out.println("=== "+negTests+" total negative test cases");
127 }
128 }
129
130 static List<Object> calledLog = new ArrayList<>();
131 static Object logEntry(String name, Object... args) {
132 return Arrays.asList(name, Arrays.asList(args));
133 }
134 public static Object called(String name, Object... args) {
135 Object entry = logEntry(name, args);
136 calledLog.add(entry);
137 return entry;
138 }
139 static void assertCalled(String name, Object... args) {
140 Object expected = logEntry(name, args);
141 Object actual = calledLog.get(calledLog.size() - 1);
142 if (expected.equals(actual) && verbosity < 9) return;
143 System.out.println("assertCalled "+name+":");
144 System.out.println("expected: "+deepToString(expected));
145 System.out.println("actual: "+actual);
146 System.out.println("ex. types: "+getClasses(expected));
147 System.out.println("act. types: "+getClasses(actual));
148 assertEquals("previous method call", expected, actual);
149 }
150 static void printCalled(MethodHandle target, String name, Object... args) {
151 if (verbosity >= 3)
152 System.out.println("calling MH="+target+" to "+name+deepToString(args));
153 }
154 static String deepToString(Object x) {
155 if (x == null) return "null";
156 if (x instanceof Collection)
157 x = ((Collection)x).toArray();
158 if (x instanceof Object[]) {
159 Object[] ax = (Object[]) x;
160 ax = Arrays.copyOf(ax, ax.length, Object[].class);
161 for (int i = 0; i < ax.length; i++)
162 ax[i] = deepToString(ax[i]);
163 x = Arrays.deepToString(ax);
164 }
165 if (x.getClass().isArray())
166 try {
167 x = Arrays.class.getMethod("toString", x.getClass()).invoke(null, x);
168 } catch (ReflectiveOperationException ex) { throw new Error(ex); }
169 assert(!(x instanceof Object[]));
170 return x.toString();
171 }
172
173 static Object castToWrapper(Object value, Class<?> dst) {
174 Object wrap = null;
175 if (value instanceof Number)
176 wrap = castToWrapperOrNull(((Number)value).longValue(), dst);
177 if (value instanceof Character)
178 wrap = castToWrapperOrNull((char)(Character)value, dst);
179 if (wrap != null) return wrap;
180 return dst.cast(value);
181 }
182
183 @SuppressWarnings("cast") // primitive cast to (long) is part of the pattern
184 static Object castToWrapperOrNull(long value, Class<?> dst) {
185 if (dst == int.class || dst == Integer.class)
186 return (int)(value);
187 if (dst == long.class || dst == Long.class)
188 return (long)(value);
189 if (dst == char.class || dst == Character.class)
190 return (char)(value);
191 if (dst == short.class || dst == Short.class)
192 return (short)(value);
193 if (dst == float.class || dst == Float.class)
194 return (float)(value);
195 if (dst == double.class || dst == Double.class)
196 return (double)(value);
197 if (dst == byte.class || dst == Byte.class)
198 return (byte)(value);
199 if (dst == boolean.class || dst == boolean.class)
200 return ((value % 29) & 1) == 0;
201 return null;
202 }
203
204 static final int ONE_MILLION = (1000*1000), // first int value
205 TEN_BILLION = (10*1000*1000*1000), // scale factor to reach upper 32 bits
206 INITIAL_ARG_VAL = ONE_MILLION << 1; // <<1 makes space for sign bit;
207 static long nextArgVal;
208 static long nextArg(boolean moreBits) {
209 long val = nextArgVal++;
210 long sign = -(val & 1); // alternate signs
211 val >>= 1;
212 if (moreBits)
213 // Guarantee some bits in the high word.
214 // In any case keep the decimal representation simple-looking,
215 // with lots of zeroes, so as not to make the printed decimal
216 // strings unnecessarily noisy.
217 val += (val % ONE_MILLION) * TEN_BILLION;
218 return val ^ sign;
219 }
220 static int nextArg() {
221 // Produce a 32-bit result something like ONE_MILLION+(smallint).
222 // Example: 1_000_042.
223 return (int) nextArg(false);
224 }
225 static long nextArg(Class<?> kind) {
226 if (kind == long.class || kind == Long.class ||
227 kind == double.class || kind == Double.class)
228 // produce a 64-bit result something like
229 // ((TEN_BILLION+1) * (ONE_MILLION+(smallint)))
230 // Example: 10_000_420_001_000_042.
231 return nextArg(true);
232 return (long) nextArg();
233 }
234
235 static Object randomArg(Class<?> param) {
236 Object wrap = castToWrapperOrNull(nextArg(param), param);
237 if (wrap != null) {
238 return wrap;
239 }
240 // import sun.invoke.util.Wrapper;
241 // Wrapper wrap = Wrapper.forBasicType(dst);
242 // if (wrap == Wrapper.OBJECT && Wrapper.isWrapperType(dst))
243 // wrap = Wrapper.forWrapperType(dst);
244 // if (wrap != Wrapper.OBJECT)
245 // return wrap.wrap(nextArg++);
246 if (param.isInterface()) {
247 for (Class<?> c : param.getClasses()) {
248 if (param.isAssignableFrom(c) && !c.isInterface())
249 { param = c; break; }
250 }
251 }
252 if (param.isArray()) {
253 Class<?> ctype = param.getComponentType();
254 Object arg = Array.newInstance(ctype, 2);
255 Array.set(arg, 0, randomArg(ctype));
256 return arg;
257 }
258 if (param.isInterface() && param.isAssignableFrom(List.class))
259 return Arrays.asList("#"+nextArg());
260 if (param.isInterface() || param.isAssignableFrom(String.class))
261 return "#"+nextArg();
262 else
263 try {
264 return param.newInstance();
265 } catch (InstantiationException | IllegalAccessException ex) {
266 }
267 return null; // random class not Object, String, Integer, etc.
268 }
269 static Object[] randomArgs(Class<?>... params) {
270 Object[] args = new Object[params.length];
271 for (int i = 0; i < args.length; i++)
272 args[i] = randomArg(params[i]);
273 return args;
274 }
275 static Object[] randomArgs(int nargs, Class<?> param) {
276 Object[] args = new Object[nargs];
277 for (int i = 0; i < args.length; i++)
278 args[i] = randomArg(param);
279 return args;
280 }
281 static Object[] randomArgs(List<Class<?>> params) {
282 return randomArgs(params.toArray(new Class<?>[params.size()]));
283 }
284
285 @SafeVarargs @SuppressWarnings("varargs")
286 static <T, E extends T> T[] array(Class<T[]> atype, E... a) {
287 return Arrays.copyOf(a, a.length, atype);
288 }
289 @SafeVarargs @SuppressWarnings("varargs")
290 static <T> T[] cat(T[] a, T... b) {
291 int alen = a.length, blen = b.length;
292 if (blen == 0) return a;
293 T[] c = Arrays.copyOf(a, alen + blen);
294 System.arraycopy(b, 0, c, alen, blen);
295 return c;
296 }
297 static Integer[] boxAll(int... vx) {
298 Integer[] res = new Integer[vx.length];
299 for (int i = 0; i < res.length; i++) {
300 res[i] = vx[i];
301 }
302 return res;
303 }
304 static Object getClasses(Object x) {
305 if (x == null) return x;
306 if (x instanceof String) return x; // keep the name
307 if (x instanceof List) {
308 // recursively report classes of the list elements
309 Object[] xa = ((List)x).toArray();
310 for (int i = 0; i < xa.length; i++)
311 xa[i] = getClasses(xa[i]);
312 return Arrays.asList(xa);
313 }
314 return x.getClass().getSimpleName();
315 }
316
317 /** Return lambda(arg...[arity]) { new Object[]{ arg... } } */
318 static MethodHandle varargsList(int arity) {
319 return ValueConversions.varargsList(arity);
320 }
321 /** Return lambda(arg...[arity]) { Arrays.asList(arg...) } */
322 static MethodHandle varargsArray(int arity) {
323 return ValueConversions.varargsArray(arity);
324 }
325 static MethodHandle varargsArray(Class<?> arrayType, int arity) {
326 return ValueConversions.varargsArray(arrayType, arity);
327 }
328 /** Variation of varargsList, but with the given rtype. */
329 static MethodHandle varargsList(int arity, Class<?> rtype) {
330 MethodHandle list = varargsList(arity);
331 MethodType listType = list.type().changeReturnType(rtype);
332 if (List.class.isAssignableFrom(rtype) || rtype == void.class || rtype == Object.class) {
333 // OK
334 } else if (rtype.isAssignableFrom(String.class)) {
335 if (LIST_TO_STRING == null)
336 try {
337 LIST_TO_STRING = PRIVATE.findStatic(PRIVATE.lookupClass(), "listToString",
338 MethodType.methodType(String.class, List.class));
339 } catch (NoSuchMethodException | IllegalAccessException ex) { throw new RuntimeException(ex); }
340 list = MethodHandles.filterReturnValue(list, LIST_TO_STRING);
341 } else if (rtype.isPrimitive()) {
342 if (LIST_TO_INT == null)
343 try {
344 LIST_TO_INT = PRIVATE.findStatic(PRIVATE.lookupClass(), "listToInt",
345 MethodType.methodType(int.class, List.class));
346 } catch (NoSuchMethodException | IllegalAccessException ex) { throw new RuntimeException(ex); }
347 list = MethodHandles.filterReturnValue(list, LIST_TO_INT);
348 list = MethodHandles.explicitCastArguments(list, listType);
349 } else {
350 throw new RuntimeException("varargsList: "+rtype);
351 }
352 return list.asType(listType);
353 }
354 /** Variation of varargsList, but with the given ptypes and rtype. */
355 static MethodHandle varargsList(List<Class<?>> ptypes, Class<?> rtype) {
356 MethodHandle list = varargsList(ptypes.size(), rtype);
357 return list.asType(MethodType.methodType(rtype, ptypes));
358 }
359 private static MethodHandle LIST_TO_STRING, LIST_TO_INT;
360 private static String listToString(List<?> x) { return x.toString(); }
361 private static int listToInt(List<?> x) { return x.toString().hashCode(); }
362
363 static MethodHandle changeArgTypes(MethodHandle target, Class<?> argType) {
364 return changeArgTypes(target, 0, 999, argType);
365 }
366 static MethodHandle changeArgTypes(MethodHandle target,
367 int beg, int end, Class<?> argType) {
368 MethodType targetType = target.type();
369 end = Math.min(end, targetType.parameterCount());
370 ArrayList<Class<?>> argTypes = new ArrayList<>(targetType.parameterList());
371 Collections.fill(argTypes.subList(beg, end), argType);
372 MethodType ttype2 = MethodType.methodType(targetType.returnType(), argTypes);
373 return target.asType(ttype2);
374 }
375 static MethodHandle addTrailingArgs(MethodHandle target, int nargs, Class<?> argClass) {
376 int targetLen = target.type().parameterCount();
377 int extra = (nargs - targetLen);
378 if (extra <= 0) return target;
379 List<Class<?>> fakeArgs = Collections.<Class<?>>nCopies(extra, argClass);
380 return MethodHandles.dropArguments(target, targetLen, fakeArgs);
381 }
382
383 // This lookup is good for all members in and under MethodHandlesTest.
384 static final Lookup PRIVATE = MethodHandles.lookup();
385 // This lookup is good for package-private members but not private ones.
386 static final Lookup PACKAGE = PackageSibling.lookup();
387 // This lookup is good for public members and protected members of PubExample
388 static final Lookup SUBCLASS = RemoteExample.lookup();
389 // This lookup is good only for public members.
390 static final Lookup PUBLIC = MethodHandles.publicLookup();
391
392 // Subject methods...
393 static class Example implements IntExample {
394 final String name;
395 public Example() { name = "Example#"+nextArg(); }
396 protected Example(String name) { this.name = name; }
397 @SuppressWarnings("LeakingThisInConstructor")
398 protected Example(int x) { this(); called("protected <init>", this, x); }
399 //Example(Void x) { does not exist; lookup elicts NoSuchMethodException }
400 @Override public String toString() { return name; }
401
402 public void v0() { called("v0", this); }
403 protected void pro_v0() { called("pro_v0", this); }
404 void pkg_v0() { called("pkg_v0", this); }
405 private void pri_v0() { called("pri_v0", this); }
406 public static void s0() { called("s0"); }
407 protected static void pro_s0() { called("pro_s0"); }
408 static void pkg_s0() { called("pkg_s0"); }
409 private static void pri_s0() { called("pri_s0"); }
410
411 public Object v1(Object x) { return called("v1", this, x); }
412 public Object v2(Object x, Object y) { return called("v2", this, x, y); }
413 public Object v2(Object x, int y) { return called("v2", this, x, y); }
414 public Object v2(int x, Object y) { return called("v2", this, x, y); }
415 public Object v2(int x, int y) { return called("v2", this, x, y); }
416 public static Object s1(Object x) { return called("s1", x); }
417 public static Object s2(int x) { return called("s2", x); }
418 public static Object s3(long x) { return called("s3", x); }
419 public static Object s4(int x, int y) { return called("s4", x, y); }
420 public static Object s5(long x, int y) { return called("s5", x, y); }
421 public static Object s6(int x, long y) { return called("s6", x, y); }
422 public static Object s7(float x, double y) { return called("s7", x, y); }
423
424 // for testing findConstructor:
425 public Example(String x, int y) { this.name = x+y; called("Example.<init>", x, y); }
426 public Example(int x, String y) { this.name = x+y; called("Example.<init>", x, y); }
427 public Example(int x, int y) { this.name = x+""+y; called("Example.<init>", x, y); }
428 public Example(int x, long y) { this.name = x+""+y; called("Example.<init>", x, y); }
429 public Example(int x, float y) { this.name = x+""+y; called("Example.<init>", x, y); }
430 public Example(int x, double y) { this.name = x+""+y; called("Example.<init>", x, y); }
431 public Example(int x, int y, int z) { this.name = x+""+y+""+z; called("Example.<init>", x, y, z); }
432 public Example(int x, int y, int z, int a) { this.name = x+""+y+""+z+""+a; called("Example.<init>", x, y, z, a); }
433
434 static final Lookup EXAMPLE = MethodHandles.lookup(); // for testing findSpecial
435 }
436 static final Lookup EXAMPLE = Example.EXAMPLE;
437 public static class PubExample extends Example {
438 public PubExample() { this("PubExample"); }
439 protected PubExample(String prefix) { super(prefix+"#"+nextArg()); }
440 protected void pro_v0() { called("Pub/pro_v0", this); }
441 protected static void pro_s0() { called("Pub/pro_s0"); }
442 }
443 static class SubExample extends Example {
444 @Override public void v0() { called("Sub/v0", this); }
445 @Override void pkg_v0() { called("Sub/pkg_v0", this); }
446 @SuppressWarnings("LeakingThisInConstructor")
447 private SubExample(int x) { called("<init>", this, x); }
448 public SubExample() { super("SubExample#"+nextArg()); }
449 }
450 public static interface IntExample {
451 public void v0();
452 public default void vd() { called("vd", this); }
453 public static class Impl implements IntExample {
454 public void v0() { called("Int/v0", this); }
455 final String name;
456 public Impl() { name = "Impl#"+nextArg(); }
457 @Override public String toString() { return name; }
458 }
459 }
460 static interface SubIntExample extends IntExample { }
461
462 static final Object[][][] ACCESS_CASES = {
463 { { false, PUBLIC }, { false, SUBCLASS }, { false, PACKAGE }, { false, PRIVATE }, { false, EXAMPLE } }, //[0]: all false
464 { { false, PUBLIC }, { false, SUBCLASS }, { false, PACKAGE }, { true, PRIVATE }, { true, EXAMPLE } }, //[1]: only PRIVATE
465 { { false, PUBLIC }, { false, SUBCLASS }, { true, PACKAGE }, { true, PRIVATE }, { true, EXAMPLE } }, //[2]: PUBLIC false
466 { { false, PUBLIC }, { true, SUBCLASS }, { true, PACKAGE }, { true, PRIVATE }, { true, EXAMPLE } }, //[3]: subclass OK
467 { { true, PUBLIC }, { true, SUBCLASS }, { true, PACKAGE }, { true, PRIVATE }, { true, EXAMPLE } }, //[4]: all true
468 };
469
470 static Object[][] accessCases(Class<?> defc, String name, boolean isSpecial) {
471 Object[][] cases;
472 if (name.contains("pri_") || isSpecial) {
473 cases = ACCESS_CASES[1]; // PRIVATE only
474 } else if (name.contains("pkg_") || !Modifier.isPublic(defc.getModifiers())) {
475 cases = ACCESS_CASES[2]; // not PUBLIC
476 } else if (name.contains("pro_")) {
477 cases = ACCESS_CASES[3]; // PUBLIC class, protected member
478 } else {
479 assertTrue(name.indexOf('_') < 0 || name.contains("fin_"));
480 boolean pubc = Modifier.isPublic(defc.getModifiers());
481 if (pubc)
482 cases = ACCESS_CASES[4]; // all access levels
483 else
484 cases = ACCESS_CASES[2]; // PACKAGE but not PUBLIC
485 }
486 if (defc != Example.class && cases[cases.length-1][1] == EXAMPLE)
487 cases = Arrays.copyOfRange(cases, 0, cases.length-1);
488 return cases;
489 }
490 static Object[][] accessCases(Class<?> defc, String name) {
491 return accessCases(defc, name, false);
492 }
493
494 static Lookup maybeMoveIn(Lookup lookup, Class<?> defc) {
495 if (lookup == PUBLIC || lookup == SUBCLASS || lookup == PACKAGE)
496 // external views stay external
497 return lookup;
498 return lookup.in(defc);
499 }
500
501 /** Is findVirtual (etc.) of "<init<" supposed to elicit a NoSuchMethodException? */
502 static final boolean INIT_REF_CAUSES_NSME = true;
503
504 @Test
505 public void testFindStatic() throws Throwable {
506 CodeCacheOverflowProcessor.runMHTest(this::testFindStatic0);
507 }
508
509 public void testFindStatic0() throws Throwable {
510 if (CAN_SKIP_WORKING) return;
511 startTest("findStatic");
512 testFindStatic(PubExample.class, void.class, "s0");
513 testFindStatic(Example.class, void.class, "s0");
514 testFindStatic(Example.class, void.class, "pkg_s0");
515 testFindStatic(Example.class, void.class, "pri_s0");
516 testFindStatic(Example.class, void.class, "pro_s0");
517 testFindStatic(PubExample.class, void.class, "Pub/pro_s0");
518
519 testFindStatic(Example.class, Object.class, "s1", Object.class);
520 testFindStatic(Example.class, Object.class, "s2", int.class);
521 testFindStatic(Example.class, Object.class, "s3", long.class);
522 testFindStatic(Example.class, Object.class, "s4", int.class, int.class);
523 testFindStatic(Example.class, Object.class, "s5", long.class, int.class);
524 testFindStatic(Example.class, Object.class, "s6", int.class, long.class);
525 testFindStatic(Example.class, Object.class, "s7", float.class, double.class);
526
527 testFindStatic(false, PRIVATE, Example.class, void.class, "bogus");
528 testFindStatic(false, PRIVATE, Example.class, void.class, "<init>", int.class);
529 testFindStatic(false, PRIVATE, Example.class, void.class, "<init>", Void.class);
530 testFindStatic(false, PRIVATE, Example.class, void.class, "v0");
531 }
532
533 void testFindStatic(Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
534 for (Object[] ac : accessCases(defc, name)) {
535 testFindStatic((Boolean)ac[0], (Lookup)ac[1], defc, ret, name, params);
536 }
537 }
538 void testFindStatic(Lookup lookup, Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
539 testFindStatic(true, lookup, defc, ret, name, params);
540 }
541 void testFindStatic(boolean positive, Lookup lookup, Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
542 countTest(positive);
543 String methodName = name.substring(1 + name.indexOf('/')); // foo/bar => foo
544 MethodType type = MethodType.methodType(ret, params);
545 MethodHandle target = null;
546 Exception noAccess = null;
547 try {
548 if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
549 target = maybeMoveIn(lookup, defc).findStatic(defc, methodName, type);
550 } catch (ReflectiveOperationException ex) {
551 noAccess = ex;
552 assertExceptionClass(
553 (name.contains("bogus") || INIT_REF_CAUSES_NSME && name.contains("<init>"))
554 ? NoSuchMethodException.class
555 : IllegalAccessException.class,
556 noAccess);
557 if (verbosity >= 5) ex.printStackTrace(System.out);
558 }
559 if (verbosity >= 3)
560 System.out.println("findStatic "+lookup+": "+defc.getName()+"."+name+"/"+type+" => "+target
561 +(noAccess == null ? "" : " !! "+noAccess));
562 if (positive && noAccess != null) throw noAccess;
563 assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
564 if (!positive) return; // negative test failed as expected
565 assertEquals(type, target.type());
566 assertNameStringContains(target, methodName);
567 Object[] args = randomArgs(params);
568 printCalled(target, name, args);
569 target.invokeWithArguments(args);
570 assertCalled(name, args);
571 if (verbosity >= 1)
572 System.out.print(':');
573 }
574
575 static void assertExceptionClass(Class<? extends Throwable> expected,
576 Throwable actual) {
577 if (expected.isInstance(actual)) return;
578 actual.printStackTrace();
579 assertEquals(expected, actual.getClass());
580 }
581
582 static final boolean DEBUG_METHOD_HANDLE_NAMES = Boolean.getBoolean("java.lang.invoke.MethodHandle.DEBUG_NAMES");
583
584 // rough check of name string
585 static void assertNameStringContains(MethodHandle x, String s) {
586 if (!DEBUG_METHOD_HANDLE_NAMES) {
587 // ignore s
588 assertEquals("MethodHandle"+x.type(), x.toString());
589 return;
590 }
591 if (x.toString().contains(s)) return;
592 assertEquals(s, x);
593 }
594
595 @Test
596 public void testFindVirtual() throws Throwable {
597 CodeCacheOverflowProcessor.runMHTest(this::testFindVirtual0);
598 }
599
600 public void testFindVirtual0() throws Throwable {
601 if (CAN_SKIP_WORKING) return;
602 startTest("findVirtual");
603 testFindVirtual(Example.class, void.class, "v0");
604 testFindVirtual(Example.class, void.class, "pkg_v0");
605 testFindVirtual(Example.class, void.class, "pri_v0");
606 testFindVirtual(Example.class, Object.class, "v1", Object.class);
607 testFindVirtual(Example.class, Object.class, "v2", Object.class, Object.class);
608 testFindVirtual(Example.class, Object.class, "v2", Object.class, int.class);
609 testFindVirtual(Example.class, Object.class, "v2", int.class, Object.class);
610 testFindVirtual(Example.class, Object.class, "v2", int.class, int.class);
611 testFindVirtual(Example.class, void.class, "pro_v0");
612 testFindVirtual(PubExample.class, void.class, "Pub/pro_v0");
613
614 testFindVirtual(false, PRIVATE, Example.class, Example.class, void.class, "bogus");
615 testFindVirtual(false, PRIVATE, Example.class, Example.class, void.class, "<init>", int.class);
616 testFindVirtual(false, PRIVATE, Example.class, Example.class, void.class, "<init>", Void.class);
617 testFindVirtual(false, PRIVATE, Example.class, Example.class, void.class, "s0");
618
619 // test dispatch
620 testFindVirtual(SubExample.class, SubExample.class, void.class, "Sub/v0");
621 testFindVirtual(SubExample.class, Example.class, void.class, "Sub/v0");
622 testFindVirtual(SubExample.class, IntExample.class, void.class, "Sub/v0");
623 testFindVirtual(SubExample.class, SubExample.class, void.class, "Sub/pkg_v0");
624 testFindVirtual(SubExample.class, Example.class, void.class, "Sub/pkg_v0");
625 testFindVirtual(Example.class, IntExample.class, void.class, "v0");
626 testFindVirtual(IntExample.Impl.class, IntExample.class, void.class, "Int/v0");
627 }
628
629 @Test
630 public void testFindVirtualClone() throws Throwable {
631 CodeCacheOverflowProcessor.runMHTest(this::testFindVirtualClone0);
632 }
633
634 public void testFindVirtualClone0() throws Throwable {
635 // test some ad hoc system methods
636 testFindVirtual(false, PUBLIC, Object.class, Object.class, "clone");
637 testFindVirtual(true, PUBLIC, Object[].class, Object.class, "clone");
638 testFindVirtual(true, PUBLIC, int[].class, Object.class, "clone");
639 for (Class<?> cls : new Class<?>[]{ boolean[].class, long[].class, float[].class, char[].class })
640 testFindVirtual(true, PUBLIC, cls, Object.class, "clone");
641 }
642
643 void testFindVirtual(Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
644 Class<?> rcvc = defc;
645 testFindVirtual(rcvc, defc, ret, name, params);
646 }
647 void testFindVirtual(Class<?> rcvc, Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
648 for (Object[] ac : accessCases(defc, name)) {
649 testFindVirtual((Boolean)ac[0], (Lookup)ac[1], rcvc, defc, ret, name, params);
650 }
651 }
652 void testFindVirtual(Lookup lookup, Class<?> rcvc, Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
653 testFindVirtual(true, lookup, rcvc, defc, ret, name, params);
654 }
655 void testFindVirtual(boolean positive, Lookup lookup, Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
656 testFindVirtual(positive, lookup, defc, defc, ret, name, params);
657 }
658 void testFindVirtual(boolean positive, Lookup lookup, Class<?> rcvc, Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
659 countTest(positive);
660 String methodName = name.substring(1 + name.indexOf('/')); // foo/bar => foo
661 MethodType type = MethodType.methodType(ret, params);
662 MethodHandle target = null;
663 Exception noAccess = null;
664 try {
665 if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
666 target = maybeMoveIn(lookup, defc).findVirtual(defc, methodName, type);
667 } catch (ReflectiveOperationException ex) {
668 noAccess = ex;
669 assertExceptionClass(
670 (name.contains("bogus") || INIT_REF_CAUSES_NSME && name.contains("<init>"))
671 ? NoSuchMethodException.class
672 : IllegalAccessException.class,
673 noAccess);
674 if (verbosity >= 5) ex.printStackTrace(System.out);
675 }
676 if (verbosity >= 3)
677 System.out.println("findVirtual "+lookup+": "+defc.getName()+"."+name+"/"+type+" => "+target
678 +(noAccess == null ? "" : " !! "+noAccess));
679 if (positive && noAccess != null) throw noAccess;
680 assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
681 if (!positive) return; // negative test failed as expected
682 Class<?> selfc = defc;
683 // predict receiver type narrowing:
684 if (lookup == SUBCLASS &&
685 name.contains("pro_") &&
686 selfc.isAssignableFrom(lookup.lookupClass())) {
687 selfc = lookup.lookupClass();
688 if (name.startsWith("Pub/")) name = "Rem/"+name.substring(4);
689 }
690 Class<?>[] paramsWithSelf = cat(array(Class[].class, (Class)selfc), params);
691 MethodType typeWithSelf = MethodType.methodType(ret, paramsWithSelf);
692 assertEquals(typeWithSelf, target.type());
693 assertNameStringContains(target, methodName);
694 Object[] argsWithSelf = randomArgs(paramsWithSelf);
695 if (selfc.isAssignableFrom(rcvc) && rcvc != selfc) argsWithSelf[0] = randomArg(rcvc);
696 printCalled(target, name, argsWithSelf);
697 Object res = target.invokeWithArguments(argsWithSelf);
698 if (Example.class.isAssignableFrom(defc) || IntExample.class.isAssignableFrom(defc)) {
699 assertCalled(name, argsWithSelf);
700 } else if (name.equals("clone")) {
701 // Ad hoc method call outside Example. For Object[].clone.
702 printCalled(target, name, argsWithSelf);
703 assertEquals(MethodType.methodType(Object.class, rcvc), target.type());
704 Object orig = argsWithSelf[0];
705 assertEquals(orig.getClass(), res.getClass());
706 if (res instanceof Object[])
707 assertArrayEquals((Object[])res, (Object[])argsWithSelf[0]);
708 assert(Arrays.deepEquals(new Object[]{res}, new Object[]{argsWithSelf[0]}));
709 } else {
710 assert(false) : Arrays.asList(positive, lookup, rcvc, defc, ret, name, deepToString(params));
711 }
712 if (verbosity >= 1)
713 System.out.print(':');
714 }
715
716 @Test
717 public void testFindSpecial() throws Throwable {
718 CodeCacheOverflowProcessor.runMHTest(this::testFindSpecial0);
719 }
720
721 public void testFindSpecial0() throws Throwable {
722 if (CAN_SKIP_WORKING) return;
723 startTest("findSpecial");
724 testFindSpecial(SubExample.class, Example.class, void.class, false, "v0");
725 testFindSpecial(SubExample.class, Example.class, void.class, false, "pkg_v0");
726 testFindSpecial(RemoteExample.class, PubExample.class, void.class, false, "Pub/pro_v0");
727 testFindSpecial(Example.class, IntExample.class, void.class, true, "vd");
728 // Do some negative testing:
729 for (Lookup lookup : new Lookup[]{ PRIVATE, EXAMPLE, PACKAGE, PUBLIC }) {
730 testFindSpecial(false, lookup, Object.class, Example.class, void.class, "v0");
731 testFindSpecial(false, lookup, SubExample.class, Example.class, void.class, "bogus");
732 testFindSpecial(false, lookup, SubExample.class, Example.class, void.class, "<init>", int.class);
733 testFindSpecial(false, lookup, SubExample.class, Example.class, void.class, "<init>", Void.class);
734 testFindSpecial(false, lookup, SubExample.class, Example.class, void.class, "s0");
735 testFindSpecial(false, lookup, Example.class, IntExample.class, void.class, "v0");
736 }
737 }
738
739 void testFindSpecial(Class<?> specialCaller,
740 Class<?> defc, Class<?> ret, boolean dflt, String name, Class<?>... params) throws Throwable {
741 if (specialCaller == RemoteExample.class) {
742 testFindSpecial(false, EXAMPLE, specialCaller, defc, ret, name, params);
743 testFindSpecial(false, PRIVATE, specialCaller, defc, ret, name, params);
744 testFindSpecial(false, PACKAGE, specialCaller, defc, ret, name, params);
745 testFindSpecial(true, SUBCLASS, specialCaller, defc, ret, name, params);
746 testFindSpecial(false, PUBLIC, specialCaller, defc, ret, name, params);
747 return;
748 }
749 testFindSpecial(true, EXAMPLE, specialCaller, defc, ret, name, params);
750 testFindSpecial(true, PRIVATE, specialCaller, defc, ret, name, params);
751 testFindSpecial(false || dflt, PACKAGE, specialCaller, defc, ret, name, params);
752 testFindSpecial(false, SUBCLASS, specialCaller, defc, ret, name, params);
753 testFindSpecial(false, PUBLIC, specialCaller, defc, ret, name, params);
754 }
755 void testFindSpecial(boolean positive, Lookup lookup, Class<?> specialCaller,
756 Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
757 countTest(positive);
758 String methodName = name.substring(1 + name.indexOf('/')); // foo/bar => foo
759 MethodType type = MethodType.methodType(ret, params);
760 Lookup specialLookup = maybeMoveIn(lookup, specialCaller);
761 boolean specialAccessOK = (specialLookup.lookupClass() == specialCaller &&
762 (specialLookup.lookupModes() & Lookup.PRIVATE) != 0);
763 MethodHandle target = null;
764 Exception noAccess = null;
765 try {
766 if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
767 if (verbosity >= 5) System.out.println(" lookup => "+specialLookup);
768 target = specialLookup.findSpecial(defc, methodName, type, specialCaller);
769 } catch (ReflectiveOperationException ex) {
770 noAccess = ex;
771 assertExceptionClass(
772 (!specialAccessOK) // this check should happen first
773 ? IllegalAccessException.class
774 : (name.contains("bogus") || INIT_REF_CAUSES_NSME && name.contains("<init>"))
775 ? NoSuchMethodException.class
776 : IllegalAccessException.class,
777 noAccess);
778 if (verbosity >= 5) ex.printStackTrace(System.out);
779 }
780 if (verbosity >= 3)
781 System.out.println("findSpecial from "+specialCaller.getName()+" to "+defc.getName()+"."+name+"/"+type+" => "+target
782 +(target == null ? "" : target.type())
783 +(noAccess == null ? "" : " !! "+noAccess));
784 if (positive && noAccess != null) throw noAccess;
785 assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
786 if (!positive) return; // negative test failed as expected
787 assertEquals(specialCaller, target.type().parameterType(0));
788 assertEquals(type, target.type().dropParameterTypes(0,1));
789 Class<?>[] paramsWithSelf = cat(array(Class[].class, (Class)specialCaller), params);
790 MethodType typeWithSelf = MethodType.methodType(ret, paramsWithSelf);
791 assertNameStringContains(target, methodName);
792 Object[] args = randomArgs(paramsWithSelf);
793 printCalled(target, name, args);
794 target.invokeWithArguments(args);
795 assertCalled(name, args);
796 }
797
798 @Test
799 public void testFindConstructor() throws Throwable {
800 CodeCacheOverflowProcessor.runMHTest(this::testFindConstructor0);
801 }
802
803 public void testFindConstructor0() throws Throwable {
804 if (CAN_SKIP_WORKING) return;
805 startTest("findConstructor");
806 testFindConstructor(true, EXAMPLE, Example.class);
807 testFindConstructor(true, EXAMPLE, Example.class, int.class);
808 testFindConstructor(true, EXAMPLE, Example.class, int.class, int.class);
809 testFindConstructor(true, EXAMPLE, Example.class, int.class, long.class);
810 testFindConstructor(true, EXAMPLE, Example.class, int.class, float.class);
811 testFindConstructor(true, EXAMPLE, Example.class, int.class, double.class);
812 testFindConstructor(true, EXAMPLE, Example.class, String.class);
813 testFindConstructor(true, EXAMPLE, Example.class, int.class, int.class, int.class);
814 testFindConstructor(true, EXAMPLE, Example.class, int.class, int.class, int.class, int.class);
815 }
816 void testFindConstructor(boolean positive, Lookup lookup,
817 Class<?> defc, Class<?>... params) throws Throwable {
818 countTest(positive);
819 MethodType type = MethodType.methodType(void.class, params);
820 MethodHandle target = null;
821 Exception noAccess = null;
822 try {
823 if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" <init>"+type);
824 target = lookup.findConstructor(defc, type);
825 } catch (ReflectiveOperationException ex) {
826 noAccess = ex;
827 assertTrue(noAccess.getClass().getName(), noAccess instanceof IllegalAccessException);
828 }
829 if (verbosity >= 3)
830 System.out.println("findConstructor "+defc.getName()+".<init>/"+type+" => "+target
831 +(target == null ? "" : target.type())
832 +(noAccess == null ? "" : " !! "+noAccess));
833 if (positive && noAccess != null) throw noAccess;
834 assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
835 if (!positive) return; // negative test failed as expected
836 assertEquals(type.changeReturnType(defc), target.type());
837 Object[] args = randomArgs(params);
838 printCalled(target, defc.getSimpleName(), args);
839 Object obj = target.invokeWithArguments(args);
840 if (!(defc == Example.class && params.length < 2))
841 assertCalled(defc.getSimpleName()+".<init>", args);
842 assertTrue("instance of "+defc.getName(), defc.isInstance(obj));
843 }
844
845 @Test
846 public void testBind() throws Throwable {
847 CodeCacheOverflowProcessor.runMHTest(this::testBind0);
848 }
849
850 public void testBind0() throws Throwable {
851 if (CAN_SKIP_WORKING) return;
852 startTest("bind");
853 testBind(Example.class, void.class, "v0");
854 testBind(Example.class, void.class, "pkg_v0");
855 testBind(Example.class, void.class, "pri_v0");
856 testBind(Example.class, Object.class, "v1", Object.class);
857 testBind(Example.class, Object.class, "v2", Object.class, Object.class);
858 testBind(Example.class, Object.class, "v2", Object.class, int.class);
859 testBind(Example.class, Object.class, "v2", int.class, Object.class);
860 testBind(Example.class, Object.class, "v2", int.class, int.class);
861 testBind(false, PRIVATE, Example.class, void.class, "bogus");
862 testBind(false, PRIVATE, Example.class, void.class, "<init>", int.class);
863 testBind(false, PRIVATE, Example.class, void.class, "<init>", Void.class);
864 testBind(SubExample.class, void.class, "Sub/v0");
865 testBind(SubExample.class, void.class, "Sub/pkg_v0");
866 testBind(IntExample.Impl.class, void.class, "Int/v0");
867 }
868
869 void testBind(Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
870 for (Object[] ac : accessCases(defc, name)) {
871 testBind((Boolean)ac[0], (Lookup)ac[1], defc, ret, name, params);
872 }
873 }
874
875 void testBind(boolean positive, Lookup lookup, Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
876 countTest(positive);
877 String methodName = name.substring(1 + name.indexOf('/')); // foo/bar => foo
878 MethodType type = MethodType.methodType(ret, params);
879 Object receiver = randomArg(defc);
880 MethodHandle target = null;
881 Exception noAccess = null;
882 try {
883 if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
884 target = maybeMoveIn(lookup, defc).bind(receiver, methodName, type);
885 } catch (ReflectiveOperationException ex) {
886 noAccess = ex;
887 assertExceptionClass(
888 (name.contains("bogus") || INIT_REF_CAUSES_NSME && name.contains("<init>"))
889 ? NoSuchMethodException.class
890 : IllegalAccessException.class,
891 noAccess);
892 if (verbosity >= 5) ex.printStackTrace(System.out);
893 }
894 if (verbosity >= 3)
895 System.out.println("bind "+receiver+"."+name+"/"+type+" => "+target
896 +(noAccess == null ? "" : " !! "+noAccess));
897 if (positive && noAccess != null) throw noAccess;
898 assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
899 if (!positive) return; // negative test failed as expected
900 assertEquals(type, target.type());
901 Object[] args = randomArgs(params);
902 printCalled(target, name, args);
903 target.invokeWithArguments(args);
904 Object[] argsWithReceiver = cat(array(Object[].class, receiver), args);
905 assertCalled(name, argsWithReceiver);
906 if (verbosity >= 1)
907 System.out.print(':');
908 }
909
910 @Test
911 public void testUnreflect() throws Throwable {
912 CodeCacheOverflowProcessor.runMHTest(this::testUnreflect0);
913 }
914
915 public void testUnreflect0() throws Throwable {
916 if (CAN_SKIP_WORKING) return;
917 startTest("unreflect");
918 testUnreflect(Example.class, true, void.class, "s0");
919 testUnreflect(Example.class, true, void.class, "pro_s0");
920 testUnreflect(Example.class, true, void.class, "pkg_s0");
921 testUnreflect(Example.class, true, void.class, "pri_s0");
922
923 testUnreflect(Example.class, true, Object.class, "s1", Object.class);
924 testUnreflect(Example.class, true, Object.class, "s2", int.class);
925 testUnreflect(Example.class, true, Object.class, "s3", long.class);
926 testUnreflect(Example.class, true, Object.class, "s4", int.class, int.class);
927 testUnreflect(Example.class, true, Object.class, "s5", long.class, int.class);
928 testUnreflect(Example.class, true, Object.class, "s6", int.class, long.class);
929
930 testUnreflect(Example.class, false, void.class, "v0");
931 testUnreflect(Example.class, false, void.class, "pkg_v0");
932 testUnreflect(Example.class, false, void.class, "pri_v0");
933 testUnreflect(Example.class, false, Object.class, "v1", Object.class);
934 testUnreflect(Example.class, false, Object.class, "v2", Object.class, Object.class);
935 testUnreflect(Example.class, false, Object.class, "v2", Object.class, int.class);
936 testUnreflect(Example.class, false, Object.class, "v2", int.class, Object.class);
937 testUnreflect(Example.class, false, Object.class, "v2", int.class, int.class);
938
939 // Test a public final member in another package:
940 testUnreflect(RemoteExample.class, false, void.class, "Rem/fin_v0");
941 }
942
943 void testUnreflect(Class<?> defc, boolean isStatic, Class<?> ret, String name, Class<?>... params) throws Throwable {
944 for (Object[] ac : accessCases(defc, name)) {
945 testUnreflectMaybeSpecial(null, (Boolean)ac[0], (Lookup)ac[1], defc, (isStatic ? null : defc), ret, name, params);
946 }
947 }
948 void testUnreflect(Class<?> defc, Class<?> rcvc, Class<?> ret, String name, Class<?>... params) throws Throwable {
949 for (Object[] ac : accessCases(defc, name)) {
950 testUnreflectMaybeSpecial(null, (Boolean)ac[0], (Lookup)ac[1], defc, rcvc, ret, name, params);
951 }
952 }
953 void testUnreflectMaybeSpecial(Class<?> specialCaller,
954 boolean positive, Lookup lookup,
955 Class<?> defc, Class<?> rcvc, Class<?> ret, String name, Class<?>... params) throws Throwable {
956 countTest(positive);
957 String methodName = name.substring(1 + name.indexOf('/')); // foo/bar => foo
958 MethodType type = MethodType.methodType(ret, params);
959 Lookup specialLookup = (specialCaller != null ? maybeMoveIn(lookup, specialCaller) : null);
960 boolean specialAccessOK = (specialCaller != null &&
961 specialLookup.lookupClass() == specialCaller &&
962 (specialLookup.lookupModes() & Lookup.PRIVATE) != 0);
963 Method rmethod = defc.getDeclaredMethod(methodName, params);
964 MethodHandle target = null;
965 Exception noAccess = null;
966 boolean isStatic = (rcvc == null);
967 boolean isSpecial = (specialCaller != null);
968 try {
969 if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
970 if (isSpecial)
971 target = specialLookup.unreflectSpecial(rmethod, specialCaller);
972 else
973 target = maybeMoveIn(lookup, defc).unreflect(rmethod);
974 } catch (ReflectiveOperationException ex) {
975 noAccess = ex;
976 assertExceptionClass(
977 IllegalAccessException.class, // NSME is impossible, since it was already reflected
978 noAccess);
979 if (verbosity >= 5) ex.printStackTrace(System.out);
980 }
981 if (verbosity >= 3)
982 System.out.println("unreflect"+(isSpecial?"Special":"")+" "+defc.getName()+"."+name+"/"+type
983 +(!isSpecial ? "" : " specialCaller="+specialCaller)
984 +( isStatic ? "" : " receiver="+rcvc)
985 +" => "+target
986 +(noAccess == null ? "" : " !! "+noAccess));
987 if (positive && noAccess != null) throw noAccess;
988 assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
989 if (!positive) return; // negative test failed as expected
990 assertEquals(isStatic, Modifier.isStatic(rmethod.getModifiers()));
991 Class<?>[] paramsMaybeWithSelf = params;
992 if (!isStatic) {
993 paramsMaybeWithSelf = cat(array(Class[].class, (Class)rcvc), params);
994 }
995 MethodType typeMaybeWithSelf = MethodType.methodType(ret, paramsMaybeWithSelf);
996 if (isStatic) {
997 assertEquals(typeMaybeWithSelf, target.type());
998 } else {
999 if (isSpecial)
1000 assertEquals(specialCaller, target.type().parameterType(0));
1001 else
1002 assertEquals(defc, target.type().parameterType(0));
1003 assertEquals(typeMaybeWithSelf, target.type().changeParameterType(0, rcvc));
1004 }
1005 Object[] argsMaybeWithSelf = randomArgs(paramsMaybeWithSelf);
1006 printCalled(target, name, argsMaybeWithSelf);
1007 target.invokeWithArguments(argsMaybeWithSelf);
1008 assertCalled(name, argsMaybeWithSelf);
1009 if (verbosity >= 1)
1010 System.out.print(':');
1011 }
1012
1013 void testUnreflectSpecial(Class<?> defc, Class<?> rcvc, Class<?> ret, String name, Class<?>... params) throws Throwable {
1014 for (Object[] ac : accessCases(defc, name, true)) {
1015 Class<?> specialCaller = rcvc;
1016 testUnreflectMaybeSpecial(specialCaller, (Boolean)ac[0], (Lookup)ac[1], defc, rcvc, ret, name, params);
1017 }
1018 }
1019
1020 @Test
1021 public void testUnreflectSpecial() throws Throwable {
1022 CodeCacheOverflowProcessor.runMHTest(this::testUnreflectSpecial0);
1023 }
1024
1025 public void testUnreflectSpecial0() throws Throwable {
1026 if (CAN_SKIP_WORKING) return;
1027 startTest("unreflectSpecial");
1028 testUnreflectSpecial(Example.class, Example.class, void.class, "v0");
1029 testUnreflectSpecial(Example.class, SubExample.class, void.class, "v0");
1030 testUnreflectSpecial(Example.class, Example.class, void.class, "pkg_v0");
1031 testUnreflectSpecial(Example.class, SubExample.class, void.class, "pkg_v0");
1032 testUnreflectSpecial(Example.class, Example.class, Object.class, "v2", int.class, int.class);
1033 testUnreflectSpecial(Example.class, SubExample.class, Object.class, "v2", int.class, int.class);
1034 testUnreflectMaybeSpecial(Example.class, false, PRIVATE, Example.class, Example.class, void.class, "s0");
1035 }
1036
1037 public static class HasFields {
1038 boolean fZ = false;
1039 byte fB = (byte)'B';
1040 short fS = (short)'S';
1041 char fC = 'C';
1042 int fI = 'I';
1043 long fJ = 'J';
1044 float fF = 'F';
1045 double fD = 'D';
1046 static boolean sZ = true;
1047 static byte sB = 1+(byte)'B';
1048 static short sS = 1+(short)'S';
1049 static char sC = 1+'C';
1050 static int sI = 1+'I';
1051 static long sJ = 1+'J';
1052 static float sF = 1+'F';
1053 static double sD = 1+'D';
1054
1055 Object fL = 'L';
1056 String fR = "R";
1057 static Object sL = 'M';
1058 static String sR = "S";
1059
1060 static final Object[][] CASES;
1061 static {
1062 ArrayList<Object[]> cases = new ArrayList<>();
1063 Object types[][] = {
1064 {'L',Object.class}, {'R',String.class},
1065 {'I',int.class}, {'J',long.class},
1066 {'F',float.class}, {'D',double.class},
1067 {'Z',boolean.class}, {'B',byte.class},
1068 {'S',short.class}, {'C',char.class},
1069 };
1070 HasFields fields = new HasFields();
1071 for (Object[] t : types) {
1072 for (int kind = 0; kind <= 1; kind++) {
1073 boolean isStatic = (kind != 0);
1074 char btc = (Character)t[0];
1075 String name = (isStatic ? "s" : "f") + btc;
1076 Class<?> type = (Class<?>) t[1];
1077 Object value;
1078 Field field;
1079 try {
1080 field = HasFields.class.getDeclaredField(name);
1081 } catch (NoSuchFieldException | SecurityException ex) {
1082 throw new InternalError("no field HasFields."+name);
1083 }
1084 try {
1085 value = field.get(fields);
1086 } catch (IllegalArgumentException | IllegalAccessException ex) {
1087 throw new InternalError("cannot fetch field HasFields."+name);
1088 }
1089 if (type == float.class) {
1090 float v = 'F';
1091 if (isStatic) v++;
1092 assertTrue(value.equals(v));
1093 }
1094 assertTrue(name.equals(field.getName()));
1095 assertTrue(type.equals(field.getType()));
1096 assertTrue(isStatic == (Modifier.isStatic(field.getModifiers())));
1097 cases.add(new Object[]{ field, value });
1098 }
1099 }
1100 cases.add(new Object[]{ new Object[]{ false, HasFields.class, "bogus_fD", double.class }, Error.class });
1101 cases.add(new Object[]{ new Object[]{ true, HasFields.class, "bogus_sL", Object.class }, Error.class });
1102 CASES = cases.toArray(new Object[0][]);
1103 }
1104 }
1105
1106 static final int TEST_UNREFLECT = 1, TEST_FIND_FIELD = 2, TEST_FIND_STATIC = 3, TEST_SETTER = 0x10, TEST_BOUND = 0x20, TEST_NPE = 0x40;
1107 static boolean testModeMatches(int testMode, boolean isStatic) {
1108 switch (testMode) {
1109 case TEST_FIND_STATIC: return isStatic;
1110 case TEST_FIND_FIELD: return !isStatic;
1111 case TEST_UNREFLECT: return true; // unreflect matches both
1112 }
1113 throw new InternalError("testMode="+testMode);
1114 }
1115
1116 @Test
1117 public void testUnreflectGetter() throws Throwable {
1118 CodeCacheOverflowProcessor.runMHTest(this::testUnreflectGetter0);
1119 }
1120
1121 public void testUnreflectGetter0() throws Throwable {
1122 if (CAN_SKIP_WORKING) return;
1123 startTest("unreflectGetter");
1124 testGetter(TEST_UNREFLECT);
1125 }
1126
1127 @Test
1128 public void testFindGetter() throws Throwable {
1129 CodeCacheOverflowProcessor.runMHTest(this::testFindGetter0);
1130 }
1131
1132 public void testFindGetter0() throws Throwable {
1133 if (CAN_SKIP_WORKING) return;
1134 startTest("findGetter");
1135 testGetter(TEST_FIND_FIELD);
1136 testGetter(TEST_FIND_FIELD | TEST_BOUND);
1137 }
1138
1139 @Test
1140 public void testFindStaticGetter() throws Throwable {
1141 CodeCacheOverflowProcessor.runMHTest(this::testFindStaticGetter0);
1142 }
1143
1144 public void testFindStaticGetter0() throws Throwable {
1145 if (CAN_SKIP_WORKING) return;
1146 startTest("findStaticGetter");
1147 testGetter(TEST_FIND_STATIC);
1148 }
1149
1150 public void testGetter(int testMode) throws Throwable {
1151 Lookup lookup = PRIVATE; // FIXME: test more lookups than this one
1152 for (Object[] c : HasFields.CASES) {
1153 boolean positive = (c[1] != Error.class);
1154 testGetter(positive, lookup, c[0], c[1], testMode);
1155 if (positive)
1156 testGetter(positive, lookup, c[0], c[1], testMode | TEST_NPE);
1157 }
1158 testGetter(true, lookup,
1159 new Object[]{ true, System.class, "out", java.io.PrintStream.class },
1160 System.out, testMode);
1161 for (int isStaticN = 0; isStaticN <= 1; isStaticN++) {
1162 testGetter(false, lookup,
1163 new Object[]{ (isStaticN != 0), System.class, "bogus", char.class },
1164 null, testMode);
1165 }
1166 }
1167 public void testGetter(boolean positive, MethodHandles.Lookup lookup,
1168 Object fieldRef, Object value, int testMode) throws Throwable {
1169 testAccessor(positive, lookup, fieldRef, value, testMode);
1170 }
1171
1172 public void testAccessor(boolean positive0, MethodHandles.Lookup lookup,
1173 Object fieldRef, Object value, int testMode0) throws Throwable {
1174 if (verbosity >= 4)
1175 System.out.println("testAccessor"+Arrays.deepToString(new Object[]{positive0, lookup, fieldRef, value, testMode0}));
1176 boolean isGetter = ((testMode0 & TEST_SETTER) == 0);
1177 boolean doBound = ((testMode0 & TEST_BOUND) != 0);
1178 boolean testNPE = ((testMode0 & TEST_NPE) != 0);
1179 int testMode = testMode0 & ~(TEST_SETTER | TEST_BOUND | TEST_NPE);
1180 boolean positive = positive0 && !testNPE;
1181 boolean isStatic;
1182 Class<?> fclass;
1183 String fname;
1184 Class<?> ftype;
1185 Field f = (fieldRef instanceof Field ? (Field)fieldRef : null);
1186 if (f != null) {
1187 isStatic = Modifier.isStatic(f.getModifiers());
1188 fclass = f.getDeclaringClass();
1189 fname = f.getName();
1190 ftype = f.getType();
1191 } else {
1192 Object[] scnt = (Object[]) fieldRef;
1193 isStatic = (Boolean) scnt[0];
1194 fclass = (Class<?>) scnt[1];
1195 fname = (String) scnt[2];
1196 ftype = (Class<?>) scnt[3];
1197 try {
1198 f = fclass.getDeclaredField(fname);
1199 } catch (ReflectiveOperationException ex) {
1200 f = null;
1201 }
1202 }
1203 if (!testModeMatches(testMode, isStatic)) return;
1204 if (f == null && testMode == TEST_UNREFLECT) return;
1205 if (testNPE && isStatic) return;
1206 countTest(positive);
1207 MethodType expType;
1208 if (isGetter)
1209 expType = MethodType.methodType(ftype, HasFields.class);
1210 else
1211 expType = MethodType.methodType(void.class, HasFields.class, ftype);
1212 if (isStatic) expType = expType.dropParameterTypes(0, 1);
1213 Exception noAccess = null;
1214 MethodHandle mh;
1215 try {
1216 switch (testMode0 & ~(TEST_BOUND | TEST_NPE)) {
1217 case TEST_UNREFLECT: mh = lookup.unreflectGetter(f); break;
1218 case TEST_FIND_FIELD: mh = lookup.findGetter(fclass, fname, ftype); break;
1219 case TEST_FIND_STATIC: mh = lookup.findStaticGetter(fclass, fname, ftype); break;
1220 case TEST_SETTER|
1221 TEST_UNREFLECT: mh = lookup.unreflectSetter(f); break;
1222 case TEST_SETTER|
1223 TEST_FIND_FIELD: mh = lookup.findSetter(fclass, fname, ftype); break;
1224 case TEST_SETTER|
1225 TEST_FIND_STATIC: mh = lookup.findStaticSetter(fclass, fname, ftype); break;
1226 default:
1227 throw new InternalError("testMode="+testMode);
1228 }
1229 } catch (ReflectiveOperationException ex) {
1230 mh = null;
1231 noAccess = ex;
1232 assertExceptionClass(
1233 (fname.contains("bogus"))
1234 ? NoSuchFieldException.class
1235 : IllegalAccessException.class,
1236 noAccess);
1237 if (verbosity >= 5) ex.printStackTrace(System.out);
1238 }
1239 if (verbosity >= 3)
1240 System.out.println("find"+(isStatic?"Static":"")+(isGetter?"Getter":"Setter")+" "+fclass.getName()+"."+fname+"/"+ftype
1241 +" => "+mh
1242 +(noAccess == null ? "" : " !! "+noAccess));
1243 if (positive && !testNPE && noAccess != null) throw new RuntimeException(noAccess);
1244 assertEquals(positive0 ? "positive test" : "negative test erroneously passed", positive0, mh != null);
1245 if (!positive && !testNPE) return; // negative access test failed as expected
1246 assertEquals((isStatic ? 0 : 1)+(isGetter ? 0 : 1), mh.type().parameterCount());
1247
1248
1249 assertSame(mh.type(), expType);
1250 //assertNameStringContains(mh, fname); // This does not hold anymore with LFs
1251 HasFields fields = new HasFields();
1252 HasFields fieldsForMH = fields;
1253 if (testNPE) fieldsForMH = null; // perturb MH argument to elicit expected error
1254 if (doBound)
1255 mh = mh.bindTo(fieldsForMH);
1256 Object sawValue;
1257 Class<?> vtype = ftype;
1258 if (ftype != int.class) vtype = Object.class;
1259 if (isGetter) {
1260 mh = mh.asType(mh.type().generic()
1261 .changeReturnType(vtype));
1262 } else {
1263 int last = mh.type().parameterCount() - 1;
1264 mh = mh.asType(mh.type().generic()
1265 .changeReturnType(void.class)
1266 .changeParameterType(last, vtype));
1267 }
1268 if (f != null && f.getDeclaringClass() == HasFields.class) {
1269 assertEquals(f.get(fields), value); // clean to start with
1270 }
1271 Throwable caughtEx = null;
1272 if (isGetter) {
1273 Object expValue = value;
1274 for (int i = 0; i <= 1; i++) {
1275 sawValue = null; // make DA rules happy under try/catch
1276 try {
1277 if (isStatic || doBound) {
1278 if (ftype == int.class)
1279 sawValue = (int) mh.invokeExact(); // do these exactly
1280 else
1281 sawValue = mh.invokeExact();
1282 } else {
1283 if (ftype == int.class)
1284 sawValue = (int) mh.invokeExact((Object) fieldsForMH);
1285 else
1286 sawValue = mh.invokeExact((Object) fieldsForMH);
1287 }
1288 } catch (RuntimeException ex) {
1289 if (ex instanceof NullPointerException && testNPE) {
1290 caughtEx = ex;
1291 break;
1292 }
1293 }
1294 assertEquals(sawValue, expValue);
1295 if (f != null && f.getDeclaringClass() == HasFields.class
1296 && !Modifier.isFinal(f.getModifiers())) {
1297 Object random = randomArg(ftype);
1298 f.set(fields, random);
1299 expValue = random;
1300 } else {
1301 break;
1302 }
1303 }
1304 } else {
1305 for (int i = 0; i <= 1; i++) {
1306 Object putValue = randomArg(ftype);
1307 try {
1308 if (isStatic || doBound) {
1309 if (ftype == int.class)
1310 mh.invokeExact((int)putValue); // do these exactly
1311 else
1312 mh.invokeExact(putValue);
1313 } else {
1314 if (ftype == int.class)
1315 mh.invokeExact((Object) fieldsForMH, (int)putValue);
1316 else
1317 mh.invokeExact((Object) fieldsForMH, putValue);
1318 }
1319 } catch (RuntimeException ex) {
1320 if (ex instanceof NullPointerException && testNPE) {
1321 caughtEx = ex;
1322 break;
1323 }
1324 }
1325 if (f != null && f.getDeclaringClass() == HasFields.class) {
1326 assertEquals(f.get(fields), putValue);
1327 }
1328 }
1329 }
1330 if (f != null && f.getDeclaringClass() == HasFields.class) {
1331 f.set(fields, value); // put it back
1332 }
1333 if (testNPE) {
1334 if (caughtEx == null || !(caughtEx instanceof NullPointerException))
1335 throw new RuntimeException("failed to catch NPE exception"+(caughtEx == null ? " (caughtEx=null)" : ""), caughtEx);
1336 caughtEx = null; // nullify expected exception
1337 }
1338 if (caughtEx != null) {
1339 throw new RuntimeException("unexpected exception", caughtEx);
1340 }
1341 }
1342
1343 @Test
1344 public void testUnreflectSetter() throws Throwable {
1345 CodeCacheOverflowProcessor.runMHTest(this::testUnreflectSetter0);
1346 }
1347
1348 public void testUnreflectSetter0() throws Throwable {
1349 if (CAN_SKIP_WORKING) return;
1350 startTest("unreflectSetter");
1351 testSetter(TEST_UNREFLECT);
1352 }
1353
1354 @Test
1355 public void testFindSetter() throws Throwable {
1356 CodeCacheOverflowProcessor.runMHTest(this::testFindSetter0);
1357 }
1358
1359 public void testFindSetter0() throws Throwable {
1360 if (CAN_SKIP_WORKING) return;
1361 startTest("findSetter");
1362 testSetter(TEST_FIND_FIELD);
1363 testSetter(TEST_FIND_FIELD | TEST_BOUND);
1364 }
1365
1366 @Test
1367 public void testFindStaticSetter() throws Throwable {
1368 CodeCacheOverflowProcessor.runMHTest(this::testFindStaticSetter0);
1369 }
1370
1371 public void testFindStaticSetter0() throws Throwable {
1372 if (CAN_SKIP_WORKING) return;
1373 startTest("findStaticSetter");
1374 testSetter(TEST_FIND_STATIC);
1375 }
1376
1377 public void testSetter(int testMode) throws Throwable {
1378 Lookup lookup = PRIVATE; // FIXME: test more lookups than this one
1379 startTest("unreflectSetter");
1380 for (Object[] c : HasFields.CASES) {
1381 boolean positive = (c[1] != Error.class);
1382 testSetter(positive, lookup, c[0], c[1], testMode);
1383 if (positive)
1384 testSetter(positive, lookup, c[0], c[1], testMode | TEST_NPE);
1385 }
1386 for (int isStaticN = 0; isStaticN <= 1; isStaticN++) {
1387 testSetter(false, lookup,
1388 new Object[]{ (isStaticN != 0), System.class, "bogus", char.class },
1389 null, testMode);
1390 }
1391 }
1392 public void testSetter(boolean positive, MethodHandles.Lookup lookup,
1393 Object fieldRef, Object value, int testMode) throws Throwable {
1394 testAccessor(positive, lookup, fieldRef, value, testMode | TEST_SETTER);
1395 }
1396
1397 @Test
1398 public void testArrayElementGetter() throws Throwable {
1399 CodeCacheOverflowProcessor.runMHTest(this::testArrayElementGetter0);
1400 }
1401
1402 public void testArrayElementGetter0() throws Throwable {
1403 if (CAN_SKIP_WORKING) return;
1404 startTest("arrayElementGetter");
1405 testArrayElementGetterSetter(false);
1406 }
1407
1408 @Test
1409 public void testArrayElementSetter() throws Throwable {
1410 CodeCacheOverflowProcessor.runMHTest(this::testArrayElementSetter0);
1411 }
1412
1413 public void testArrayElementSetter0() throws Throwable {
1414 if (CAN_SKIP_WORKING) return;
1415 startTest("arrayElementSetter");
1416 testArrayElementGetterSetter(true);
1417 }
1418
1419 private static final int TEST_ARRAY_NONE = 0, TEST_ARRAY_NPE = 1, TEST_ARRAY_OOB = 2, TEST_ARRAY_ASE = 3;
1420
1421 public void testArrayElementGetterSetter(boolean testSetter) throws Throwable {
1422 testArrayElementGetterSetter(testSetter, TEST_ARRAY_NONE);
1423 }
1424
1425 @Test
1426 public void testArrayElementErrors() throws Throwable {
1427 CodeCacheOverflowProcessor.runMHTest(this::testArrayElementErrors0);
1428 }
1429
1430 public void testArrayElementErrors0() throws Throwable {
1431 if (CAN_SKIP_WORKING) return;
1432 startTest("arrayElementErrors");
1433 testArrayElementGetterSetter(false, TEST_ARRAY_NPE);
1434 testArrayElementGetterSetter(true, TEST_ARRAY_NPE);
1435 testArrayElementGetterSetter(false, TEST_ARRAY_OOB);
1436 testArrayElementGetterSetter(true, TEST_ARRAY_OOB);
1437 testArrayElementGetterSetter(new Object[10], true, TEST_ARRAY_ASE);
1438 testArrayElementGetterSetter(new Example[10], true, TEST_ARRAY_ASE);
1439 testArrayElementGetterSetter(new IntExample[10], true, TEST_ARRAY_ASE);
1440 }
1441
1442 public void testArrayElementGetterSetter(boolean testSetter, int negTest) throws Throwable {
1443 testArrayElementGetterSetter(new String[10], testSetter, negTest);
1444 testArrayElementGetterSetter(new Iterable<?>[10], testSetter, negTest);
1445 testArrayElementGetterSetter(new Example[10], testSetter, negTest);
1446 testArrayElementGetterSetter(new IntExample[10], testSetter, negTest);
1447 testArrayElementGetterSetter(new Object[10], testSetter, negTest);
1448 testArrayElementGetterSetter(new boolean[10], testSetter, negTest);
1449 testArrayElementGetterSetter(new byte[10], testSetter, negTest);
1450 testArrayElementGetterSetter(new char[10], testSetter, negTest);
1451 testArrayElementGetterSetter(new short[10], testSetter, negTest);
1452 testArrayElementGetterSetter(new int[10], testSetter, negTest);
1453 testArrayElementGetterSetter(new float[10], testSetter, negTest);
1454 testArrayElementGetterSetter(new long[10], testSetter, negTest);
1455 testArrayElementGetterSetter(new double[10], testSetter, negTest);
1456 }
1457
1458 public void testArrayElementGetterSetter(Object array, boolean testSetter, int negTest) throws Throwable {
1459 boolean positive = (negTest == TEST_ARRAY_NONE);
1460 int length = java.lang.reflect.Array.getLength(array);
1461 Class<?> arrayType = array.getClass();
1462 Class<?> elemType = arrayType.getComponentType();
1463 Object arrayToMH = array;
1464 // this stanza allows negative tests to make argument perturbations:
1465 switch (negTest) {
1466 case TEST_ARRAY_NPE:
1467 arrayToMH = null;
1468 break;
1469 case TEST_ARRAY_OOB:
1470 assert(length > 0);
1471 arrayToMH = java.lang.reflect.Array.newInstance(elemType, 0);
1472 break;
1473 case TEST_ARRAY_ASE:
1474 assert(testSetter && !elemType.isPrimitive());
1475 if (elemType == Object.class)
1476 arrayToMH = new StringBuffer[length]; // very random subclass of Object!
1477 else if (elemType == Example.class)
1478 arrayToMH = new SubExample[length];
1479 else if (elemType == IntExample.class)
1480 arrayToMH = new SubIntExample[length];
1481 else
1482 return; // can't make an ArrayStoreException test
1483 assert(arrayType.isInstance(arrayToMH))
1484 : Arrays.asList(arrayType, arrayToMH.getClass(), testSetter, negTest);
1485 break;
1486 }
1487 countTest(positive);
1488 if (verbosity > 2) System.out.println("array type = "+array.getClass().getComponentType().getName()+"["+length+"]"+(positive ? "" : " negative test #"+negTest+" using "+Arrays.deepToString(new Object[]{arrayToMH})));
1489 MethodType expType = !testSetter
1490 ? MethodType.methodType(elemType, arrayType, int.class)
1491 : MethodType.methodType(void.class, arrayType, int.class, elemType);
1492 MethodHandle mh = !testSetter
1493 ? MethodHandles.arrayElementGetter(arrayType)
1494 : MethodHandles.arrayElementSetter(arrayType);
1495 assertSame(mh.type(), expType);
1496 if (elemType != int.class && elemType != boolean.class) {
1497 MethodType gtype = mh.type().generic().changeParameterType(1, int.class);
1498 if (testSetter) gtype = gtype.changeReturnType(void.class);
1499 mh = mh.asType(gtype);
1500 }
1501 Object sawValue, expValue;
1502 List<Object> model = array2list(array);
1503 Throwable caughtEx = null;
1504 for (int i = 0; i < length; i++) {
1505 // update array element
1506 Object random = randomArg(elemType);
1507 model.set(i, random);
1508 if (testSetter) {
1509 try {
1510 if (elemType == int.class)
1511 mh.invokeExact((int[]) arrayToMH, i, (int)random);
1512 else if (elemType == boolean.class)
1513 mh.invokeExact((boolean[]) arrayToMH, i, (boolean)random);
1514 else
1515 mh.invokeExact(arrayToMH, i, random);
1516 } catch (RuntimeException ex) {
1517 caughtEx = ex;
1518 break;
1519 }
1520 assertEquals(model, array2list(array));
1521 } else {
1522 Array.set(array, i, random);
1523 }
1524 if (verbosity >= 5) {
1525 List<Object> array2list = array2list(array);
1526 System.out.println("a["+i+"]="+random+" => "+array2list);
1527 if (!array2list.equals(model))
1528 System.out.println("*** != "+model);
1529 }
1530 // observe array element
1531 sawValue = Array.get(array, i);
1532 if (!testSetter) {
1533 expValue = sawValue;
1534 try {
1535 if (elemType == int.class)
1536 sawValue = (int) mh.invokeExact((int[]) arrayToMH, i);
1537 else if (elemType == boolean.class)
1538 sawValue = (boolean) mh.invokeExact((boolean[]) arrayToMH, i);
1539 else
1540 sawValue = mh.invokeExact(arrayToMH, i);
1541 } catch (RuntimeException ex) {
1542 caughtEx = ex;
1543 break;
1544 }
1545 assertEquals(sawValue, expValue);
1546 assertEquals(model, array2list(array));
1547 }
1548 }
1549 if (!positive) {
1550 if (caughtEx == null)
1551 throw new RuntimeException("failed to catch exception for negTest="+negTest);
1552 // test the kind of exception
1553 Class<?> reqType = null;
1554 switch (negTest) {
1555 case TEST_ARRAY_ASE: reqType = ArrayStoreException.class; break;
1556 case TEST_ARRAY_OOB: reqType = ArrayIndexOutOfBoundsException.class; break;
1557 case TEST_ARRAY_NPE: reqType = NullPointerException.class; break;
1558 default: assert(false);
1559 }
1560 if (reqType.isInstance(caughtEx)) {
1561 caughtEx = null; // nullify expected exception
1562 }
1563 }
1564 if (caughtEx != null) {
1565 throw new RuntimeException("unexpected exception", caughtEx);
1566 }
1567 }
1568
1569 List<Object> array2list(Object array) {
1570 int length = Array.getLength(array);
1571 ArrayList<Object> model = new ArrayList<>(length);
1572 for (int i = 0; i < length; i++)
1573 model.add(Array.get(array, i));
1574 return model;
1575 }
1576
1577 static class Callee {
1578 static Object id() { return called("id"); }
1579 static Object id(Object x) { return called("id", x); }
1580 static Object id(Object x, Object y) { return called("id", x, y); }
1581 static Object id(Object x, Object y, Object z) { return called("id", x, y, z); }
1582 static Object id(Object... vx) { return called("id", vx); }
1583 static MethodHandle ofType(int n) {
1584 return ofType(Object.class, n);
1585 }
1586 static MethodHandle ofType(Class<?> rtype, int n) {
1587 if (n == -1)
1588 return ofType(MethodType.methodType(rtype, Object[].class));
1589 return ofType(MethodType.genericMethodType(n).changeReturnType(rtype));
1590 }
1591 static MethodHandle ofType(Class<?> rtype, Class<?>... ptypes) {
1592 return ofType(MethodType.methodType(rtype, ptypes));
1593 }
1594 static MethodHandle ofType(MethodType type) {
1595 Class<?> rtype = type.returnType();
1596 String pfx = "";
1597 if (rtype != Object.class)
1598 pfx = rtype.getSimpleName().substring(0, 1).toLowerCase();
1599 String name = pfx+"id";
1600 try {
1601 return PRIVATE.findStatic(Callee.class, name, type);
1602 } catch (NoSuchMethodException | IllegalAccessException ex) {
1603 throw new RuntimeException(ex);
1604 }
1605 }
1606 }
1607
1608 @Test
1609 public void testConvertArguments() throws Throwable {
1610 CodeCacheOverflowProcessor.runMHTest(this::testConvertArguments0);
1611 }
1612
1613 public void testConvertArguments0() throws Throwable {
1614 if (CAN_SKIP_WORKING) return;
1615 startTest("convertArguments");
1616 testConvert(Callee.ofType(1), null, "id", int.class);
1617 testConvert(Callee.ofType(1), null, "id", String.class);
1618 testConvert(Callee.ofType(1), null, "id", Integer.class);
1619 testConvert(Callee.ofType(1), null, "id", short.class);
1620 testConvert(Callee.ofType(1), null, "id", char.class);
1621 testConvert(Callee.ofType(1), null, "id", byte.class);
1622 }
1623
1624 void testConvert(MethodHandle id, Class<?> rtype, String name, Class<?>... params) throws Throwable {
1625 testConvert(true, id, rtype, name, params);
1626 }
1627
1628 void testConvert(boolean positive,
1629 MethodHandle id, Class<?> rtype, String name, Class<?>... params) throws Throwable {
1630 countTest(positive);
1631 MethodType idType = id.type();
1632 if (rtype == null) rtype = idType.returnType();
1633 for (int i = 0; i < params.length; i++) {
1634 if (params[i] == null) params[i] = idType.parameterType(i);
1635 }
1636 // simulate the pairwise conversion
1637 MethodType newType = MethodType.methodType(rtype, params);
1638 Object[] args = randomArgs(newType.parameterArray());
1639 Object[] convArgs = args.clone();
1640 for (int i = 0; i < args.length; i++) {
1641 Class<?> src = newType.parameterType(i);
1642 Class<?> dst = idType.parameterType(i);
1643 if (src != dst)
1644 convArgs[i] = castToWrapper(convArgs[i], dst);
1645 }
1646 Object convResult = id.invokeWithArguments(convArgs);
1647 {
1648 Class<?> dst = newType.returnType();
1649 Class<?> src = idType.returnType();
1650 if (src != dst)
1651 convResult = castToWrapper(convResult, dst);
1652 }
1653 MethodHandle target = null;
1654 RuntimeException error = null;
1655 try {
1656 target = id.asType(newType);
1657 } catch (WrongMethodTypeException ex) {
1658 error = ex;
1659 }
1660 if (verbosity >= 3)
1661 System.out.println("convert "+id+ " to "+newType+" => "+target
1662 +(error == null ? "" : " !! "+error));
1663 if (positive && error != null) throw error;
1664 assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
1665 if (!positive) return; // negative test failed as expected
1666 assertEquals(newType, target.type());
1667 printCalled(target, id.toString(), args);
1668 Object result = target.invokeWithArguments(args);
1669 assertCalled(name, convArgs);
1670 assertEquals(convResult, result);
1671 if (verbosity >= 1)
1672 System.out.print(':');
1673 }
1674
1675 @Test
1676 public void testVarargsCollector() throws Throwable {
1677 CodeCacheOverflowProcessor.runMHTest(this::testVarargsCollector0);
1678 }
1679
1680 public void testVarargsCollector0() throws Throwable {
1681 if (CAN_SKIP_WORKING) return;
1682 startTest("varargsCollector");
1683 MethodHandle vac0 = PRIVATE.findStatic(MethodHandlesTest.class, "called",
1684 MethodType.methodType(Object.class, String.class, Object[].class));
1685 vac0 = vac0.bindTo("vac");
1686 MethodHandle vac = vac0.asVarargsCollector(Object[].class);
1687 testConvert(true, vac.asType(MethodType.genericMethodType(0)), null, "vac");
1688 testConvert(true, vac.asType(MethodType.genericMethodType(0)), null, "vac");
1689 for (Class<?> at : new Class<?>[] { Object.class, String.class, Integer.class }) {
1690 testConvert(true, vac.asType(MethodType.genericMethodType(1)), null, "vac", at);
1691 testConvert(true, vac.asType(MethodType.genericMethodType(2)), null, "vac", at, at);
1692 }
1693 }
1694
1695 @Test // SLOW
1696 public void testPermuteArguments() throws Throwable {
1697 CodeCacheOverflowProcessor.runMHTest(this::testPermuteArguments0);
1698 }
1699
1700 public void testPermuteArguments0() throws Throwable {
1701 if (CAN_SKIP_WORKING) return;
1702 startTest("permuteArguments");
1703 testPermuteArguments(4, Integer.class, 2, long.class, 6);
1704 if (CAN_TEST_LIGHTLY) return;
1705 testPermuteArguments(4, Integer.class, 2, String.class, 0);
1706 testPermuteArguments(6, Integer.class, 0, null, 30);
1707 }
1708 public void testPermuteArguments(int max, Class<?> type1, int t2c, Class<?> type2, int dilution) throws Throwable {
1709 if (verbosity >= 2)
1710 System.out.println("permuteArguments "+max+"*"+type1.getName()
1711 +(t2c==0?"":"/"+t2c+"*"+type2.getName())
1712 +(dilution > 0 ? " with dilution "+dilution : ""));
1713 int t2pos = t2c == 0 ? 0 : 1;
1714 for (int inargs = t2pos+1; inargs <= max; inargs++) {
1715 Class<?>[] types = new Class<?>[inargs];
1716 Arrays.fill(types, type1);
1717 if (t2c != 0) {
1718 // Fill in a middle range with type2:
1719 Arrays.fill(types, t2pos, Math.min(t2pos+t2c, inargs), type2);
1720 }
1721 Object[] args = randomArgs(types);
1722 int numcases = 1;
1723 for (int outargs = 0; outargs <= max; outargs++) {
1724 if (outargs - inargs >= MAX_ARG_INCREASE) continue;
1725 int casStep = dilution + 1;
1726 // Avoid some common factors:
1727 while ((casStep > 2 && casStep % 2 == 0 && inargs % 2 == 0) ||
1728 (casStep > 3 && casStep % 3 == 0 && inargs % 3 == 0))
1729 casStep++;
1730 testPermuteArguments(args, types, outargs, numcases, casStep);
1731 numcases *= inargs;
1732 if (CAN_TEST_LIGHTLY && outargs < max-2) continue;
1733 if (dilution > 10 && outargs >= 4) {
1734 if (CAN_TEST_LIGHTLY) continue;
1735 int[] reorder = new int[outargs];
1736 // Do some special patterns, which we probably missed.
1737 // Replication of a single argument or argument pair.
1738 for (int i = 0; i < inargs; i++) {
1739 Arrays.fill(reorder, i);
1740 testPermuteArguments(args, types, reorder);
1741 for (int d = 1; d <= 2; d++) {
1742 if (i + d >= inargs) continue;
1743 for (int j = 1; j < outargs; j += 2)
1744 reorder[j] += 1;
1745 testPermuteArguments(args, types, reorder);
1746 testPermuteArguments(args, types, reverse(reorder));
1747 }
1748 }
1749 // Repetition of a sequence of 3 or more arguments.
1750 for (int i = 1; i < inargs; i++) {
1751 for (int len = 3; len <= inargs; len++) {
1752 for (int j = 0; j < outargs; j++)
1753 reorder[j] = (i + (j % len)) % inargs;
1754 testPermuteArguments(args, types, reorder);
1755 testPermuteArguments(args, types, reverse(reorder));
1756 }
1757 }
1758 }
1759 }
1760 }
1761 }
1762
1763 public void testPermuteArguments(Object[] args, Class<?>[] types,
1764 int outargs, int numcases, int casStep) throws Throwable {
1765 int inargs = args.length;
1766 int[] reorder = new int[outargs];
1767 for (int cas = 0; cas < numcases; cas += casStep) {
1768 for (int i = 0, c = cas; i < outargs; i++) {
1769 reorder[i] = c % inargs;
1770 c /= inargs;
1771 }
1772 if (CAN_TEST_LIGHTLY && outargs >= 3 && (reorder[0] == reorder[1] || reorder[1] == reorder[2])) continue;
1773 testPermuteArguments(args, types, reorder);
1774 }
1775 }
1776
1777 static int[] reverse(int[] reorder) {
1778 reorder = reorder.clone();
1779 for (int i = 0, imax = reorder.length / 2; i < imax; i++) {
1780 int j = reorder.length - 1 - i;
1781 int tem = reorder[i];
1782 reorder[i] = reorder[j];
1783 reorder[j] = tem;
1784 }
1785 return reorder;
1786 }
1787
1788 void testPermuteArguments(Object[] args, Class<?>[] types, int[] reorder) throws Throwable {
1789 countTest();
1790 if (args == null && types == null) {
1791 int max = 0;
1792 for (int j : reorder) {
1793 if (max < j) max = j;
1794 }
1795 args = randomArgs(max+1, Integer.class);
1796 }
1797 if (args == null) {
1798 args = randomArgs(types);
1799 }
1800 if (types == null) {
1801 types = new Class<?>[args.length];
1802 for (int i = 0; i < args.length; i++)
1803 types[i] = args[i].getClass();
1804 }
1805 int inargs = args.length, outargs = reorder.length;
1806 assertTrue(inargs == types.length);
1807 if (verbosity >= 3)
1808 System.out.println("permuteArguments "+Arrays.toString(reorder));
1809 Object[] permArgs = new Object[outargs];
1810 Class<?>[] permTypes = new Class<?>[outargs];
1811 for (int i = 0; i < outargs; i++) {
1812 permArgs[i] = args[reorder[i]];
1813 permTypes[i] = types[reorder[i]];
1814 }
1815 if (verbosity >= 4) {
1816 System.out.println("in args: "+Arrays.asList(args));
1817 System.out.println("out args: "+Arrays.asList(permArgs));
1818 System.out.println("in types: "+Arrays.asList(types));
1819 System.out.println("out types: "+Arrays.asList(permTypes));
1820 }
1821 MethodType inType = MethodType.methodType(Object.class, types);
1822 MethodType outType = MethodType.methodType(Object.class, permTypes);
1823 MethodHandle target = varargsList(outargs).asType(outType);
1824 MethodHandle newTarget = MethodHandles.permuteArguments(target, inType, reorder);
1825 if (verbosity >= 5) System.out.println("newTarget = "+newTarget);
1826 Object result = newTarget.invokeWithArguments(args);
1827 Object expected = Arrays.asList(permArgs);
1828 if (!expected.equals(result)) {
1829 System.out.println("*** failed permuteArguments "+Arrays.toString(reorder)+" types="+Arrays.asList(types));
1830 System.out.println("in args: "+Arrays.asList(args));
1831 System.out.println("out args: "+expected);
1832 System.out.println("bad args: "+result);
1833 }
1834 assertEquals(expected, result);
1835 }
1836
1837
1838 @Test // SLOW
1839 public void testSpreadArguments() throws Throwable {
1840 CodeCacheOverflowProcessor.runMHTest(this::testSpreadArguments0);
1841 CodeCacheOverflowProcessor.runMHTest(this::testSpreadArguments1);
1842 }
1843
1844 public void testSpreadArguments0() throws Throwable {
1845 if (CAN_SKIP_WORKING) return;
1846 startTest("spreadArguments");
1847 for (Class<?> argType : new Class<?>[]{Object.class, Integer.class, int.class}) {
1848 if (verbosity >= 3)
1849 System.out.println("spreadArguments "+argType);
1850 Class<?> arrayType = java.lang.reflect.Array.newInstance(argType, 0).getClass();
1851 for (int nargs = 0; nargs < 50; nargs++) {
1852 if (CAN_TEST_LIGHTLY && nargs > 11) break;
1853 for (int pos = 0; pos <= nargs; pos++) {
1854 if (CAN_TEST_LIGHTLY && pos > 2 && pos < nargs-2) continue;
1855 if (nargs > 10 && pos > 4 && pos < nargs-4 && pos % 10 != 3)
1856 continue;
1857 testSpreadArguments(argType, arrayType, pos, nargs);
1858 }
1859 }
1860 }
1861 }
1862 public void testSpreadArguments(Class<?> argType, Class<?> arrayType, int pos, int nargs) throws Throwable {
1863 countTest();
1864 MethodHandle target2 = varargsArray(arrayType, nargs);
1865 MethodHandle target = target2.asType(target2.type().generic());
1866 if (verbosity >= 3)
1867 System.out.println("spread into "+target2+" ["+pos+".."+nargs+"]");
1868 Object[] args = randomArgs(target2.type().parameterArray());
1869 // make sure the target does what we think it does:
1870 checkTarget(argType, pos, nargs, target, args);
1871 List<Class<?>> newParams = new ArrayList<>(target2.type().parameterList());
1872 { // modify newParams in place
1873 List<Class<?>> spreadParams = newParams.subList(pos, nargs);
1874 spreadParams.clear(); spreadParams.add(arrayType);
1875 }
1876 MethodType newType = MethodType.methodType(arrayType, newParams);
1877 MethodHandle result = target2.asSpreader(arrayType, nargs-pos);
1878 assert(result.type() == newType) : Arrays.asList(result, newType);
1879 result = result.asType(newType.generic());
1880 Object returnValue;
1881 if (pos == 0) {
1882 Object args2 = ValueConversions.changeArrayType(arrayType, Arrays.copyOfRange(args, pos, args.length));
1883 returnValue = result.invokeExact(args2);
1884 } else {
1885 Object[] args1 = Arrays.copyOfRange(args, 0, pos+1);
1886 args1[pos] = ValueConversions.changeArrayType(arrayType, Arrays.copyOfRange(args, pos, args.length));
1887 returnValue = result.invokeWithArguments(args1);
1888 }
1889 checkReturnValue(argType, args, result, returnValue);
1890 }
1891 public void testSpreadArguments1() throws Throwable {
1892 if (CAN_SKIP_WORKING) return;
1893 startTest("spreadArguments/pos");
1894 for (Class<?> argType : new Class<?>[]{Object.class, Integer.class, int.class}) {
1895 if (verbosity >= 3)
1896 System.out.println("spreadArguments "+argType);
1897 Class<?> arrayType = java.lang.reflect.Array.newInstance(argType, 0).getClass();
1898 for (int nargs = 0; nargs < 50; nargs++) {
1899 if (CAN_TEST_LIGHTLY && nargs > 11) break;
1900 for (int pos = 0; pos <= nargs; pos++) {
1901 if (CAN_TEST_LIGHTLY && pos > 2 && pos < nargs-2) continue;
1902 if (nargs > 10 && pos > 4 && pos < nargs-4 && pos % 10 != 3)
1903 continue;
1904 for (int spr = 1; spr < nargs - pos; ++spr) {
1905 if (spr > 4 && spr != 7 && spr != 11 && spr != 20 && spr < nargs - pos - 4) continue;
1906 testSpreadArguments(argType, arrayType, pos, spr, nargs);
1907 }
1908 }
1909 }
1910 }
1911 }
1912 public void testSpreadArguments(Class<?> argType, Class<?> arrayType, int pos, int spread, int nargs) throws Throwable {
1913 countTest();
1914 MethodHandle target2 = varargsArray(arrayType, nargs);
1915 MethodHandle target = target2.asType(target2.type().generic());
1916 if (verbosity >= 3)
1917 System.out.println("spread into " + target2 + " [" + pos + ".." + (pos + spread) + "[");
1918 Object[] args = randomArgs(target2.type().parameterArray());
1919 // make sure the target does what we think it does:
1920 checkTarget(argType, pos, nargs, target, args);
1921 List<Class<?>> newParams = new ArrayList<>(target2.type().parameterList());
1922 { // modify newParams in place
1923 List<Class<?>> spreadParams = newParams.subList(pos, pos + spread);
1924 spreadParams.clear();
1925 spreadParams.add(arrayType);
1926 }
1927 MethodType newType = MethodType.methodType(arrayType, newParams);
1928 MethodHandle result = target2.asSpreader(pos, arrayType, spread);
1929 assert (result.type() == newType) : Arrays.asList(result, newType);
1930 result = result.asType(newType.generic());
1931 // args1 has nargs-spread entries, plus one for the to-be-spread array
1932 int args1Length = nargs - (spread - 1);
1933 Object[] args1 = new Object[args1Length];
1934 System.arraycopy(args, 0, args1, 0, pos);
1935 args1[pos] = ValueConversions.changeArrayType(arrayType, Arrays.copyOfRange(args, pos, pos + spread));
1936 System.arraycopy(args, pos + spread, args1, pos + 1, nargs - spread - pos);
1937 Object returnValue = result.invokeWithArguments(args1);
1938 checkReturnValue(argType, args, result, returnValue);
1939 }
1940 private static void checkTarget(Class<?> argType, int pos, int nargs, MethodHandle target, Object[] args) throws Throwable {
1941 if (pos == 0 && nargs < 5 && !argType.isPrimitive()) {
1942 Object[] check = (Object[]) target.invokeWithArguments(args);
1943 assertArrayEquals(args, check);
1944 switch (nargs) {
1945 case 0:
1946 check = (Object[]) (Object) target.invokeExact();
1947 assertArrayEquals(args, check);
1948 break;
1949 case 1:
1950 check = (Object[]) (Object) target.invokeExact(args[0]);
1951 assertArrayEquals(args, check);
1952 break;
1953 case 2:
1954 check = (Object[]) (Object) target.invokeExact(args[0], args[1]);
1955 assertArrayEquals(args, check);
1956 break;
1957 }
1958 }
1959 }
1960 private static void checkReturnValue(Class<?> argType, Object[] args, MethodHandle result, Object returnValue) {
1961 String argstr = Arrays.toString(args);
1962 if (!argType.isPrimitive()) {
1963 Object[] rv = (Object[]) returnValue;
1964 String rvs = Arrays.toString(rv);
1965 if (!Arrays.equals(args, rv)) {
1966 System.out.println("method: "+result);
1967 System.out.println("expected: "+argstr);
1968 System.out.println("returned: "+rvs);
1969 assertArrayEquals(args, rv);
1970 }
1971 } else if (argType == int.class) {
1972 String rvs = Arrays.toString((int[]) returnValue);
1973 if (!argstr.equals(rvs)) {
1974 System.out.println("method: "+result);
1975 System.out.println("expected: "+argstr);
1976 System.out.println("returned: "+rvs);
1977 assertEquals(argstr, rvs);
1978 }
1979 } else if (argType == long.class) {
1980 String rvs = Arrays.toString((long[]) returnValue);
1981 if (!argstr.equals(rvs)) {
1982 System.out.println("method: "+result);
1983 System.out.println("expected: "+argstr);
1984 System.out.println("returned: "+rvs);
1985 assertEquals(argstr, rvs);
1986 }
1987 } else {
1988 // cannot test...
1989 }
1990 }
1991
1992 @Test // SLOW
1993 public void testAsCollector() throws Throwable {
1994 CodeCacheOverflowProcessor.runMHTest(this::testAsCollector0);
1995 CodeCacheOverflowProcessor.runMHTest(this::testAsCollector1);
1996 }
1997
1998 public void testAsCollector0() throws Throwable {
1999 if (CAN_SKIP_WORKING) return;
2000 startTest("asCollector");
2001 for (Class<?> argType : new Class<?>[]{Object.class, Integer.class, int.class}) {
2002 if (verbosity >= 3)
2003 System.out.println("asCollector "+argType);
2004 for (int nargs = 0; nargs < 50; nargs++) {
2005 if (CAN_TEST_LIGHTLY && nargs > 11) break;
2006 for (int pos = 0; pos <= nargs; pos++) {
2007 if (CAN_TEST_LIGHTLY && pos > 2 && pos < nargs-2) continue;
2008 if (nargs > 10 && pos > 4 && pos < nargs-4 && pos % 10 != 3)
2009 continue;
2010 testAsCollector(argType, pos, nargs);
2011 }
2012 }
2013 }
2014 }
2015 public void testAsCollector(Class<?> argType, int pos, int nargs) throws Throwable {
2016 countTest();
2017 // fake up a MH with the same type as the desired adapter:
2018 MethodHandle fake = varargsArray(nargs);
2019 fake = changeArgTypes(fake, argType);
2020 MethodType newType = fake.type();
2021 Object[] args = randomArgs(newType.parameterArray());
2022 // here is what should happen:
2023 Object[] collectedArgs = Arrays.copyOfRange(args, 0, pos+1);
2024 collectedArgs[pos] = Arrays.copyOfRange(args, pos, args.length);
2025 // here is the MH which will witness the collected argument tail:
2026 MethodHandle target = varargsArray(pos+1);
2027 target = changeArgTypes(target, 0, pos, argType);
2028 target = changeArgTypes(target, pos, pos+1, Object[].class);
2029 if (verbosity >= 3)
2030 System.out.println("collect from "+Arrays.asList(args)+" ["+pos+".."+nargs+"]");
2031 MethodHandle result = target.asCollector(Object[].class, nargs-pos).asType(newType);
2032 Object[] returnValue = (Object[]) result.invokeWithArguments(args);
2033 // assertTrue(returnValue.length == pos+1 && returnValue[pos] instanceof Object[]);
2034 // returnValue[pos] = Arrays.asList((Object[]) returnValue[pos]);
2035 // collectedArgs[pos] = Arrays.asList((Object[]) collectedArgs[pos]);
2036 assertArrayEquals(collectedArgs, returnValue);
2037 }
2038 public void testAsCollector1() throws Throwable {
2039 if (CAN_SKIP_WORKING) return;
2040 startTest("asCollector/pos");
2041 for (Class<?> argType : new Class<?>[]{Object.class, Integer.class, int.class}) {
2042 if (verbosity >= 3)
2043 System.out.println("asCollector/pos "+argType);
2044 for (int nargs = 0; nargs < 50; nargs++) {
2045 if (CAN_TEST_LIGHTLY && nargs > 11) break;
2046 for (int pos = 0; pos <= nargs; pos++) {
2047 if (CAN_TEST_LIGHTLY && pos > 2 && pos < nargs-2) continue;
2048 if (nargs > 10 && pos > 4 && pos < nargs-4 && pos % 10 != 3)
2049 continue;
2050 for (int coll = 1; coll < nargs - pos; ++coll) {
2051 if (coll > 4 && coll != 7 && coll != 11 && coll != 20 && coll < nargs - pos - 4) continue;
2052 testAsCollector(argType, pos, coll, nargs);
2053 }
2054 }
2055 }
2056 }
2057 }
2058 public void testAsCollector(Class<?> argType, int pos, int collect, int nargs) throws Throwable {
2059 countTest();
2060 // fake up a MH with the same type as the desired adapter:
2061 MethodHandle fake = varargsArray(nargs);
2062 fake = changeArgTypes(fake, argType);
2063 MethodType newType = fake.type();
2064 Object[] args = randomArgs(newType.parameterArray());
2065 // here is what should happen:
2066 // new arg list has "collect" less arguments, but one extra for collected arguments array
2067 int collectedLength = nargs-(collect-1);
2068 Object[] collectedArgs = new Object[collectedLength];
2069 System.arraycopy(args, 0, collectedArgs, 0, pos);
2070 collectedArgs[pos] = Arrays.copyOfRange(args, pos, pos+collect);
2071 System.arraycopy(args, pos+collect, collectedArgs, pos+1, args.length-(pos+collect));
2072 // here is the MH which will witness the collected argument part (not tail!):
2073 MethodHandle target = varargsArray(collectedLength);
2074 target = changeArgTypes(target, 0, pos, argType);
2075 target = changeArgTypes(target, pos, pos+1, Object[].class);
2076 target = changeArgTypes(target, pos+1, collectedLength, argType);
2077 if (verbosity >= 3)
2078 System.out.println("collect "+collect+" from "+Arrays.asList(args)+" ["+pos+".."+(pos+collect)+"[");
2079 MethodHandle result = target.asCollector(pos, Object[].class, collect).asType(newType);
2080 Object[] returnValue = (Object[]) result.invokeWithArguments(args);
2081 assertArrayEquals(collectedArgs, returnValue);
2082 }
2083
2084 @Test // SLOW
2085 public void testInsertArguments() throws Throwable {
2086 CodeCacheOverflowProcessor.runMHTest(this::testInsertArguments0);
2087 }
2088
2089 public void testInsertArguments0() throws Throwable {
2090 if (CAN_SKIP_WORKING) return;
2091 startTest("insertArguments");
2092 for (int nargs = 0; nargs < 50; nargs++) {
2093 if (CAN_TEST_LIGHTLY && nargs > 11) break;
2094 for (int ins = 0; ins <= nargs; ins++) {
2095 if (nargs > 10 && ins > 4 && ins < nargs-4 && ins % 10 != 3)
2096 continue;
2097 for (int pos = 0; pos <= nargs; pos++) {
2098 if (nargs > 10 && pos > 4 && pos < nargs-4 && pos % 10 != 3)
2099 continue;
2100 if (CAN_TEST_LIGHTLY && pos > 2 && pos < nargs-2) continue;
2101 testInsertArguments(nargs, pos, ins);
2102 }
2103 }
2104 }
2105 }
2106
2107 void testInsertArguments(int nargs, int pos, int ins) throws Throwable {
2108 countTest();
2109 MethodHandle target = varargsArray(nargs + ins);
2110 Object[] args = randomArgs(target.type().parameterArray());
2111 List<Object> resList = Arrays.asList(args);
2112 List<Object> argsToPass = new ArrayList<>(resList);
2113 List<Object> argsToInsert = argsToPass.subList(pos, pos + ins);
2114 if (verbosity >= 3)
2115 System.out.println("insert: "+argsToInsert+" @"+pos+" into "+target);
2116 @SuppressWarnings("cast") // cast to spread Object... is helpful
2117 MethodHandle target2 = MethodHandles.insertArguments(target, pos,
2118 (Object[]/*...*/) argsToInsert.toArray());
2119 argsToInsert.clear(); // remove from argsToInsert
2120 Object res2 = target2.invokeWithArguments(argsToPass);
2121 Object res2List = Arrays.asList((Object[])res2);
2122 if (verbosity >= 3)
2123 System.out.println("result: "+res2List);
2124 //if (!resList.equals(res2List))
2125 // System.out.println("*** fail at n/p/i = "+nargs+"/"+pos+"/"+ins+": "+resList+" => "+res2List);
2126 assertEquals(resList, res2List);
2127 }
2128
2129 @Test
2130 public void testFilterReturnValue() throws Throwable {
2131 CodeCacheOverflowProcessor.runMHTest(this::testFilterReturnValue0);
2132 }
2133
2134 public void testFilterReturnValue0() throws Throwable {
2135 if (CAN_SKIP_WORKING) return;
2136 startTest("filterReturnValue");
2137 Class<?> classOfVCList = varargsList(1).invokeWithArguments(0).getClass();
2138 assertTrue(List.class.isAssignableFrom(classOfVCList));
2139 for (int nargs = 0; nargs <= 3; nargs++) {
2140 for (Class<?> rtype : new Class<?>[] { Object.class,
2141 List.class,
2142 int.class,
2143 byte.class,
2144 long.class,
2145 CharSequence.class,
2146 String.class }) {
2147 testFilterReturnValue(nargs, rtype);
2148 }
2149 }
2150 }
2151
2152 void testFilterReturnValue(int nargs, Class<?> rtype) throws Throwable {
2153 countTest();
2154 MethodHandle target = varargsList(nargs, rtype);
2155 MethodHandle filter;
2156 if (List.class.isAssignableFrom(rtype) || rtype.isAssignableFrom(List.class))
2157 filter = varargsList(1); // add another layer of list-ness
2158 else
2159 filter = MethodHandles.identity(rtype);
2160 filter = filter.asType(MethodType.methodType(target.type().returnType(), rtype));
2161 Object[] argsToPass = randomArgs(nargs, Object.class);
2162 if (verbosity >= 3)
2163 System.out.println("filter "+target+" to "+rtype.getSimpleName()+" with "+filter);
2164 MethodHandle target2 = MethodHandles.filterReturnValue(target, filter);
2165 if (verbosity >= 4)
2166 System.out.println("filtered target: "+target2);
2167 // Simulate expected effect of filter on return value:
2168 Object unfiltered = target.invokeWithArguments(argsToPass);
2169 Object expected = filter.invokeWithArguments(unfiltered);
2170 if (verbosity >= 4)
2171 System.out.println("unfiltered: "+unfiltered+" : "+unfiltered.getClass().getSimpleName());
2172 if (verbosity >= 4)
2173 System.out.println("expected: "+expected+" : "+expected.getClass().getSimpleName());
2174 Object result = target2.invokeWithArguments(argsToPass);
2175 if (verbosity >= 3)
2176 System.out.println("result: "+result+" : "+result.getClass().getSimpleName());
2177 if (!expected.equals(result))
2178 System.out.println("*** fail at n/rt = "+nargs+"/"+rtype.getSimpleName()+": "+Arrays.asList(argsToPass)+" => "+result+" != "+expected);
2179 assertEquals(expected, result);
2180 }
2181
2182 @Test
2183 public void testFilterArguments() throws Throwable {
2184 CodeCacheOverflowProcessor.runMHTest(this::testFilterArguments0);
2185 }
2186
2187 public void testFilterArguments0() throws Throwable {
2188 if (CAN_SKIP_WORKING) return;
2189 startTest("filterArguments");
2190 for (int nargs = 1; nargs <= 6; nargs++) {
2191 for (int pos = 0; pos < nargs; pos++) {
2192 testFilterArguments(nargs, pos);
2193 }
2194 }
2195 }
2196
2197 void testFilterArguments(int nargs, int pos) throws Throwable {
2198 countTest();
2199 MethodHandle target = varargsList(nargs);
2200 MethodHandle filter = varargsList(1);
2201 filter = filter.asType(filter.type().generic());
2202 Object[] argsToPass = randomArgs(nargs, Object.class);
2203 if (verbosity >= 3)
2204 System.out.println("filter "+target+" at "+pos+" with "+filter);
2205 MethodHandle target2 = MethodHandles.filterArguments(target, pos, filter);
2206 // Simulate expected effect of filter on arglist:
2207 Object[] filteredArgs = argsToPass.clone();
2208 filteredArgs[pos] = filter.invokeExact(filteredArgs[pos]);
2209 List<Object> expected = Arrays.asList(filteredArgs);
2210 Object result = target2.invokeWithArguments(argsToPass);
2211 if (verbosity >= 3)
2212 System.out.println("result: "+result);
2213 if (!expected.equals(result))
2214 System.out.println("*** fail at n/p = "+nargs+"/"+pos+": "+Arrays.asList(argsToPass)+" => "+result+" != "+expected);
2215 assertEquals(expected, result);
2216 }
2217
2218 @Test
2219 public void testCollectArguments() throws Throwable {
2220 CodeCacheOverflowProcessor.runMHTest(this::testCollectArguments0);
2221 }
2222
2223 public void testCollectArguments0() throws Throwable {
2224 if (CAN_SKIP_WORKING) return;
2225 startTest("collectArguments");
2226 testFoldOrCollectArguments(true, false);
2227 }
2228
2229 @Test
2230 public void testFoldArguments() throws Throwable {
2231 CodeCacheOverflowProcessor.runMHTest(this::testFoldArguments0);
2232 CodeCacheOverflowProcessor.runMHTest(this::testFoldArguments1);
2233 }
2234
2235 public void testFoldArguments0() throws Throwable {
2236 if (CAN_SKIP_WORKING) return;
2237 startTest("foldArguments");
2238 testFoldOrCollectArguments(false, false);
2239 }
2240
2241 public void testFoldArguments1() throws Throwable {
2242 if (CAN_SKIP_WORKING) return;
2243 startTest("foldArguments/pos");
2244 testFoldOrCollectArguments(false, true);
2245 }
2246
2247 void testFoldOrCollectArguments(boolean isCollect, boolean withFoldPos) throws Throwable {
2248 assert !(isCollect && withFoldPos); // exclude illegal argument combination
2249 for (Class<?> lastType : new Class<?>[]{ Object.class, String.class, int.class }) {
2250 for (Class<?> collectType : new Class<?>[]{ Object.class, String.class, int.class, void.class }) {
2251 int maxArity = 10;
2252 if (collectType != String.class) maxArity = 5;
2253 if (lastType != Object.class) maxArity = 4;
2254 for (int nargs = 0; nargs <= maxArity; nargs++) {
2255 ArrayList<Class<?>> argTypes = new ArrayList<>(Collections.nCopies(nargs, Object.class));
2256 int maxMix = 20;
2257 if (collectType != Object.class) maxMix = 0;
2258 Map<Object,Integer> argTypesSeen = new HashMap<>();
2259 for (int mix = 0; mix <= maxMix; mix++) {
2260 if (!mixArgs(argTypes, mix, argTypesSeen)) continue;
2261 for (int collect = 0; collect <= nargs; collect++) {
2262 for (int pos = 0; pos <= nargs - collect; pos++) {
2263 testFoldOrCollectArguments(argTypes, pos, collect, collectType, lastType, isCollect, withFoldPos);
2264 }
2265 }
2266 }
2267 }
2268 }
2269 }
2270 }
2271
2272 boolean mixArgs(List<Class<?>> argTypes, int mix, Map<Object,Integer> argTypesSeen) {
2273 assert(mix >= 0);
2274 if (mix == 0) return true; // no change
2275 if ((mix >>> argTypes.size()) != 0) return false;
2276 for (int i = 0; i < argTypes.size(); i++) {
2277 if (i >= 31) break;
2278 boolean bit = (mix & (1 << i)) != 0;
2279 if (bit) {
2280 Class<?> type = argTypes.get(i);
2281 if (type == Object.class)
2282 type = String.class;
2283 else if (type == String.class)
2284 type = int.class;
2285 else
2286 type = Object.class;
2287 argTypes.set(i, type);
2288 }
2289 }
2290 Integer prev = argTypesSeen.put(new ArrayList<>(argTypes), mix);
2291 if (prev != null) {
2292 if (verbosity >= 4) System.out.println("mix "+prev+" repeated "+mix+": "+argTypes);
2293 return false;
2294 }
2295 if (verbosity >= 3) System.out.println("mix "+mix+" = "+argTypes);
2296 return true;
2297 }
2298
2299 void testFoldOrCollectArguments(List<Class<?>> argTypes, // argument types minus the inserted combineType
2300 int pos, int fold, // position and length of the folded arguments
2301 Class<?> combineType, // type returned from the combiner
2302 Class<?> lastType, // type returned from the target
2303 boolean isCollect,
2304 boolean withFoldPos) throws Throwable {
2305 int nargs = argTypes.size();
2306 if (pos != 0 && !isCollect && !withFoldPos) return; // test MethodHandles.foldArguments(MH,MH) only for pos=0
2307 countTest();
2308 List<Class<?>> combineArgTypes = argTypes.subList(pos, pos + fold);
2309 List<Class<?>> targetArgTypes = new ArrayList<>(argTypes);
2310 if (isCollect) // does target see arg[pos..pos+cc-1]?
2311 targetArgTypes.subList(pos, pos + fold).clear();
2312 if (combineType != void.class)
2313 targetArgTypes.add(pos, combineType);
2314 MethodHandle target = varargsList(targetArgTypes, lastType);
2315 MethodHandle combine = varargsList(combineArgTypes, combineType);
2316 List<Object> argsToPass = Arrays.asList(randomArgs(argTypes));
2317 if (verbosity >= 3)
2318 System.out.println((isCollect ? "collect" : "fold")+" "+target+" with "+combine);
2319 MethodHandle target2;
2320 if (isCollect)
2321 target2 = MethodHandles.collectArguments(target, pos, combine);
2322 else
2323 target2 = withFoldPos ? MethodHandles.foldArguments(target, pos, combine) : MethodHandles.foldArguments(target, combine);
2324 // Simulate expected effect of combiner on arglist:
2325 List<Object> expectedList = new ArrayList<>(argsToPass);
2326 List<Object> argsToFold = expectedList.subList(pos, pos + fold);
2327 if (verbosity >= 3)
2328 System.out.println((isCollect ? "collect" : "fold")+": "+argsToFold+" into "+target2);
2329 Object foldedArgs = combine.invokeWithArguments(argsToFold);
2330 if (isCollect)
2331 argsToFold.clear();
2332 if (combineType != void.class)
2333 argsToFold.add(0, foldedArgs);
2334 Object result = target2.invokeWithArguments(argsToPass);
2335 if (verbosity >= 3)
2336 System.out.println("result: "+result);
2337 Object expected = target.invokeWithArguments(expectedList);
2338 if (!expected.equals(result))
2339 System.out.println("*** fail at n/p/f = "+nargs+"/"+pos+"/"+fold+": "+argsToPass+" => "+result+" != "+expected);
2340 assertEquals(expected, result);
2341 }
2342
2343 @Test
2344 public void testDropArguments() throws Throwable {
2345 CodeCacheOverflowProcessor.runMHTest(this::testDropArguments0);
2346 }
2347
2348 public void testDropArguments0() throws Throwable {
2349 if (CAN_SKIP_WORKING) return;
2350 startTest("dropArguments");
2351 for (int nargs = 0; nargs <= 4; nargs++) {
2352 for (int drop = 1; drop <= 4; drop++) {
2353 for (int pos = 0; pos <= nargs; pos++) {
2354 testDropArguments(nargs, pos, drop);
2355 }
2356 }
2357 }
2358 }
2359
2360 void testDropArguments(int nargs, int pos, int drop) throws Throwable {
2361 countTest();
2362 MethodHandle target = varargsArray(nargs);
2363 Object[] args = randomArgs(target.type().parameterArray());
2364 MethodHandle target2 = MethodHandles.dropArguments(target, pos,
2365 Collections.nCopies(drop, Object.class).toArray(new Class<?>[0]));
2366 List<Object> resList = Arrays.asList(args);
2367 List<Object> argsToDrop = new ArrayList<>(resList);
2368 for (int i = drop; i > 0; i--) {
2369 argsToDrop.add(pos, "blort#"+i);
2370 }
2371 Object res2 = target2.invokeWithArguments(argsToDrop);
2372 Object res2List = Arrays.asList((Object[])res2);
2373 //if (!resList.equals(res2List))
2374 // System.out.println("*** fail at n/p/d = "+nargs+"/"+pos+"/"+drop+": "+argsToDrop+" => "+res2List);
2375 assertEquals(resList, res2List);
2376 }
2377
2378 @Test // SLOW
2379 public void testInvokers() throws Throwable {
2380 CodeCacheOverflowProcessor.runMHTest(this::testInvokers0);
2381 }
2382
2383 public void testInvokers0() throws Throwable {
2384 if (CAN_SKIP_WORKING) return;
2385 startTest("exactInvoker, genericInvoker, varargsInvoker, dynamicInvoker");
2386 // exactInvoker, genericInvoker, varargsInvoker[0..N], dynamicInvoker
2387 Set<MethodType> done = new HashSet<>();
2388 for (int i = 0; i <= 6; i++) {
2389 if (CAN_TEST_LIGHTLY && i > 3) break;
2390 MethodType gtype = MethodType.genericMethodType(i);
2391 for (Class<?> argType : new Class<?>[]{Object.class, Integer.class, int.class}) {
2392 for (int j = -1; j < i; j++) {
2393 MethodType type = gtype;
2394 if (j < 0)
2395 type = type.changeReturnType(argType);
2396 else if (argType == void.class)
2397 continue;
2398 else
2399 type = type.changeParameterType(j, argType);
2400 if (done.add(type))
2401 testInvokersWithCatch(type);
2402 MethodType vtype = type.changeReturnType(void.class);
2403 if (done.add(vtype))
2404 testInvokersWithCatch(vtype);
2405 }
2406 }
2407 }
2408 }
2409
2410 public void testInvokersWithCatch(MethodType type) throws Throwable {
2411 try {
2412 testInvokers(type);
2413 } catch (Throwable ex) {
2414 System.out.println("*** testInvokers on "+type+" => ");
2415 ex.printStackTrace(System.out);
2416 }
2417 }
2418 public void testInvokers(MethodType type) throws Throwable {
2419 if (verbosity >= 3)
2420 System.out.println("test invokers for "+type);
2421 int nargs = type.parameterCount();
2422 boolean testRetCode = type.returnType() != void.class;
2423 MethodHandle target = PRIVATE.findStatic(MethodHandlesTest.class, "invokee",
2424 MethodType.genericMethodType(0, true));
2425 assertTrue(target.isVarargsCollector());
2426 target = target.asType(type);
2427 Object[] args = randomArgs(type.parameterArray());
2428 List<Object> targetPlusArgs = new ArrayList<>(Arrays.asList(args));
2429 targetPlusArgs.add(0, target);
2430 int code = (Integer) invokee(args);
2431 Object log = logEntry("invokee", args);
2432 assertEquals(log.hashCode(), code);
2433 assertCalled("invokee", args);
2434 MethodHandle inv;
2435 Object result;
2436 // exact invoker
2437 countTest();
2438 calledLog.clear();
2439 inv = MethodHandles.exactInvoker(type);
2440 result = inv.invokeWithArguments(targetPlusArgs);
2441 if (testRetCode) assertEquals(code, result);
2442 assertCalled("invokee", args);
2443 // generic invoker
2444 countTest();
2445 inv = MethodHandles.invoker(type);
2446 if (nargs <= 3 && type == type.generic()) {
2447 calledLog.clear();
2448 switch (nargs) {
2449 case 0:
2450 result = inv.invokeExact(target);
2451 break;
2452 case 1:
2453 result = inv.invokeExact(target, args[0]);
2454 break;
2455 case 2:
2456 result = inv.invokeExact(target, args[0], args[1]);
2457 break;
2458 case 3:
2459 result = inv.invokeExact(target, args[0], args[1], args[2]);
2460 break;
2461 }
2462 if (testRetCode) assertEquals(code, result);
2463 assertCalled("invokee", args);
2464 }
2465 calledLog.clear();
2466 result = inv.invokeWithArguments(targetPlusArgs);
2467 if (testRetCode) assertEquals(code, result);
2468 assertCalled("invokee", args);
2469 // varargs invoker #0
2470 calledLog.clear();
2471 inv = MethodHandles.spreadInvoker(type, 0);
2472 if (type.returnType() == Object.class) {
2473 result = inv.invokeExact(target, args);
2474 } else if (type.returnType() == void.class) {
2475 result = null; inv.invokeExact(target, args);
2476 } else {
2477 result = inv.invokeWithArguments(target, (Object) args);
2478 }
2479 if (testRetCode) assertEquals(code, result);
2480 assertCalled("invokee", args);
2481 if (nargs >= 1 && type == type.generic()) {
2482 // varargs invoker #1
2483 calledLog.clear();
2484 inv = MethodHandles.spreadInvoker(type, 1);
2485 result = inv.invokeExact(target, args[0], Arrays.copyOfRange(args, 1, nargs));
2486 if (testRetCode) assertEquals(code, result);
2487 assertCalled("invokee", args);
2488 }
2489 if (nargs >= 2 && type == type.generic()) {
2490 // varargs invoker #2
2491 calledLog.clear();
2492 inv = MethodHandles.spreadInvoker(type, 2);
2493 result = inv.invokeExact(target, args[0], args[1], Arrays.copyOfRange(args, 2, nargs));
2494 if (testRetCode) assertEquals(code, result);
2495 assertCalled("invokee", args);
2496 }
2497 if (nargs >= 3 && type == type.generic()) {
2498 // varargs invoker #3
2499 calledLog.clear();
2500 inv = MethodHandles.spreadInvoker(type, 3);
2501 result = inv.invokeExact(target, args[0], args[1], args[2], Arrays.copyOfRange(args, 3, nargs));
2502 if (testRetCode) assertEquals(code, result);
2503 assertCalled("invokee", args);
2504 }
2505 for (int k = 0; k <= nargs; k++) {
2506 // varargs invoker #0..N
2507 if (CAN_TEST_LIGHTLY && (k > 1 || k < nargs - 1)) continue;
2508 countTest();
2509 calledLog.clear();
2510 inv = MethodHandles.spreadInvoker(type, k);
2511 MethodType expType = (type.dropParameterTypes(k, nargs)
2512 .appendParameterTypes(Object[].class)
2513 .insertParameterTypes(0, MethodHandle.class));
2514 assertEquals(expType, inv.type());
2515 List<Object> targetPlusVarArgs = new ArrayList<>(targetPlusArgs);
2516 List<Object> tailList = targetPlusVarArgs.subList(1+k, 1+nargs);
2517 Object[] tail = tailList.toArray();
2518 tailList.clear(); tailList.add(tail);
2519 result = inv.invokeWithArguments(targetPlusVarArgs);
2520 if (testRetCode) assertEquals(code, result);
2521 assertCalled("invokee", args);
2522 }
2523
2524 // dynamic invoker
2525 countTest();
2526 CallSite site = new MutableCallSite(type);
2527 inv = site.dynamicInvoker();
2528
2529 // see if we get the result of the original target:
2530 try {
2531 result = inv.invokeWithArguments(args);
2532 assertTrue("should not reach here", false);
2533 } catch (IllegalStateException ex) {
2534 String msg = ex.getMessage();
2535 assertTrue(msg, msg.contains("site"));
2536 }
2537
2538 // set new target after invoker is created, to make sure we track target
2539 site.setTarget(target);
2540 calledLog.clear();
2541 result = inv.invokeWithArguments(args);
2542 if (testRetCode) assertEquals(code, result);
2543 assertCalled("invokee", args);
2544 }
2545
2546 static Object invokee(Object... args) {
2547 return called("invokee", args).hashCode();
2548 }
2549
2550 private static final String MISSING_ARG = "missingArg";
2551 private static final String MISSING_ARG_2 = "missingArg#2";
2552 static Object targetIfEquals() {
2553 return called("targetIfEquals");
2554 }
2555 static Object fallbackIfNotEquals() {
2556 return called("fallbackIfNotEquals");
2557 }
2558 static Object targetIfEquals(Object x) {
2559 assertEquals(x, MISSING_ARG);
2560 return called("targetIfEquals", x);
2561 }
2562 static Object fallbackIfNotEquals(Object x) {
2563 assertFalse(x.toString(), x.equals(MISSING_ARG));
2564 return called("fallbackIfNotEquals", x);
2565 }
2566 static Object targetIfEquals(Object x, Object y) {
2567 assertEquals(x, y);
2568 return called("targetIfEquals", x, y);
2569 }
2570 static Object fallbackIfNotEquals(Object x, Object y) {
2571 assertFalse(x.toString(), x.equals(y));
2572 return called("fallbackIfNotEquals", x, y);
2573 }
2574 static Object targetIfEquals(Object x, Object y, Object z) {
2575 assertEquals(x, y);
2576 return called("targetIfEquals", x, y, z);
2577 }
2578 static Object fallbackIfNotEquals(Object x, Object y, Object z) {
2579 assertFalse(x.toString(), x.equals(y));
2580 return called("fallbackIfNotEquals", x, y, z);
2581 }
2582
2583 @Test
2584 public void testGuardWithTest() throws Throwable {
2585 CodeCacheOverflowProcessor.runMHTest(this::testGuardWithTest0);
2586 }
2587
2588 public void testGuardWithTest0() throws Throwable {
2589 if (CAN_SKIP_WORKING) return;
2590 startTest("guardWithTest");
2591 for (int nargs = 0; nargs <= 50; nargs++) {
2592 if (CAN_TEST_LIGHTLY && nargs > 7) break;
2593 testGuardWithTest(nargs, Object.class);
2594 testGuardWithTest(nargs, String.class);
2595 }
2596 }
2597 void testGuardWithTest(int nargs, Class<?> argClass) throws Throwable {
2598 testGuardWithTest(nargs, 0, argClass);
2599 if (nargs <= 5 || nargs % 10 == 3) {
2600 for (int testDrops = 1; testDrops <= nargs; testDrops++)
2601 testGuardWithTest(nargs, testDrops, argClass);
2602 }
2603 }
2604 void testGuardWithTest(int nargs, int testDrops, Class<?> argClass) throws Throwable {
2605 countTest();
2606 int nargs1 = Math.min(3, nargs);
2607 MethodHandle test = PRIVATE.findVirtual(Object.class, "equals", MethodType.methodType(boolean.class, Object.class));
2608 MethodHandle target = PRIVATE.findStatic(MethodHandlesTest.class, "targetIfEquals", MethodType.genericMethodType(nargs1));
2609 MethodHandle fallback = PRIVATE.findStatic(MethodHandlesTest.class, "fallbackIfNotEquals", MethodType.genericMethodType(nargs1));
2610 while (test.type().parameterCount() > nargs)
2611 // 0: test = constant(MISSING_ARG.equals(MISSING_ARG))
2612 // 1: test = lambda (_) MISSING_ARG.equals(_)
2613 test = MethodHandles.insertArguments(test, 0, MISSING_ARG);
2614 if (argClass != Object.class) {
2615 test = changeArgTypes(test, argClass);
2616 target = changeArgTypes(target, argClass);
2617 fallback = changeArgTypes(fallback, argClass);
2618 }
2619 int testArgs = nargs - testDrops;
2620 assert(testArgs >= 0);
2621 test = addTrailingArgs(test, Math.min(testArgs, nargs), argClass);
2622 target = addTrailingArgs(target, nargs, argClass);
2623 fallback = addTrailingArgs(fallback, nargs, argClass);
2624 Object[][] argLists = {
2625 { },
2626 { "foo" }, { MISSING_ARG },
2627 { "foo", "foo" }, { "foo", "bar" },
2628 { "foo", "foo", "baz" }, { "foo", "bar", "baz" }
2629 };
2630 for (Object[] argList : argLists) {
2631 Object[] argList1 = argList;
2632 if (argList.length != nargs) {
2633 if (argList.length != nargs1) continue;
2634 argList1 = Arrays.copyOf(argList, nargs);
2635 Arrays.fill(argList1, nargs1, nargs, MISSING_ARG_2);
2636 }
2637 MethodHandle test1 = test;
2638 if (test1.type().parameterCount() > testArgs) {
2639 int pc = test1.type().parameterCount();
2640 test1 = MethodHandles.insertArguments(test, testArgs, Arrays.copyOfRange(argList1, testArgs, pc));
2641 }
2642 MethodHandle mh = MethodHandles.guardWithTest(test1, target, fallback);
2643 assertEquals(target.type(), mh.type());
2644 boolean equals;
2645 switch (nargs) {
2646 case 0: equals = true; break;
2647 case 1: equals = MISSING_ARG.equals(argList[0]); break;
2648 default: equals = argList[0].equals(argList[1]); break;
2649 }
2650 String willCall = (equals ? "targetIfEquals" : "fallbackIfNotEquals");
2651 if (verbosity >= 3)
2652 System.out.println(logEntry(willCall, argList));
2653 Object result = mh.invokeWithArguments(argList1);
2654 assertCalled(willCall, argList);
2655 }
2656 }
2657
2658 @Test
2659 public void testGenericLoopCombinator() throws Throwable {
2660 CodeCacheOverflowProcessor.runMHTest(this::testGenericLoopCombinator0);
2661 }
2662 public void testGenericLoopCombinator0() throws Throwable {
2663 if (CAN_SKIP_WORKING) return;
2664 startTest("loop");
2665 // Test as follows:
2666 // * Have an increasing number of loop-local state. Local state type diversity grows with the number.
2667 // * Initializers set the starting value of loop-local state from the corresponding loop argument.
2668 // * For each local state element, there is a predicate - for all state combinations, exercise all predicates.
2669 // * Steps modify each local state element in each iteration.
2670 // * Finalizers group all local state elements into a resulting array. Verify end values.
2671 // * Exercise both pre- and post-checked loops.
2672 // Local state types, start values, predicates, and steps:
2673 // * int a, 0, a < 7, a = a + 1
2674 // * double b, 7.0, b > 0.5, b = b / 2.0
2675 // * String c, "start", c.length <= 9, c = c + a
2676 final Class<?>[] argTypes = new Class<?>[] {int.class, double.class, String.class};
2677 final Object[][] args = new Object[][] {
2678 new Object[]{0 },
2679 new Object[]{0, 7.0 },
2680 new Object[]{0, 7.0, "start"}
2681 };
2682 // These are the expected final state tuples for argument type tuple / predicate combinations, for pre- and
2683 // post-checked loops:
2684 final Object[][] preCheckedResults = new Object[][] {
2685 new Object[]{7 }, // (int) / int
2686 new Object[]{7, 0.0546875 }, // (int,double) / int
2687 new Object[]{5, 0.4375 }, // (int,double) / double
2688 new Object[]{7, 0.0546875, "start1234567"}, // (int,double,String) / int
2689 new Object[]{5, 0.4375, "start1234" }, // (int,double,String) / double
2690 new Object[]{6, 0.109375, "start12345" } // (int,double,String) / String
2691 };
2692 final Object[][] postCheckedResults = new Object[][] {
2693 new Object[]{7 }, // (int) / int
2694 new Object[]{7, 0.109375 }, // (int,double) / int
2695 new Object[]{4, 0.4375 }, // (int,double) / double
2696 new Object[]{7, 0.109375, "start123456"}, // (int,double,String) / int
2697 new Object[]{4, 0.4375, "start123" }, // (int,double,String) / double
2698 new Object[]{5, 0.21875, "start12345" } // (int,double,String) / String
2699 };
2700 final Lookup l = MethodHandles.lookup();
2701 final Class<?> MHT = MethodHandlesTest.class;
2702 final Class<?> B = boolean.class;
2703 final Class<?> I = int.class;
2704 final Class<?> D = double.class;
2705 final Class<?> S = String.class;
2706 final MethodHandle hip = l.findStatic(MHT, "loopIntPred", methodType(B, I));
2707 final MethodHandle hdp = l.findStatic(MHT, "loopDoublePred", methodType(B, I, D));
2708 final MethodHandle hsp = l.findStatic(MHT, "loopStringPred", methodType(B, I, D, S));
2709 final MethodHandle his = l.findStatic(MHT, "loopIntStep", methodType(I, I));
2710 final MethodHandle hds = l.findStatic(MHT, "loopDoubleStep", methodType(D, I, D));
2711 final MethodHandle hss = l.findStatic(MHT, "loopStringStep", methodType(S, I, D, S));
2712 final MethodHandle[] preds = new MethodHandle[] {hip, hdp, hsp};
2713 final MethodHandle[] steps = new MethodHandle[] {his, hds, hss};
2714 for (int nargs = 1, useResultsStart = 0; nargs <= argTypes.length; useResultsStart += nargs++) {
2715 Class<?>[] useArgTypes = Arrays.copyOf(argTypes, nargs, Class[].class);
2716 MethodHandle[] usePreds = Arrays.copyOf(preds, nargs, MethodHandle[].class);
2717 MethodHandle[] useSteps = Arrays.copyOf(steps, nargs, MethodHandle[].class);
2718 Object[] useArgs = args[nargs - 1];
2719 Object[][] usePreCheckedResults = new Object[nargs][];
2720 Object[][] usePostCheckedResults = new Object[nargs][];
2721 System.arraycopy(preCheckedResults, useResultsStart, usePreCheckedResults, 0, nargs);
2722 System.arraycopy(postCheckedResults, useResultsStart, usePostCheckedResults, 0, nargs);
2723 testGenericLoopCombinator(nargs, useArgTypes, usePreds, useSteps, useArgs, usePreCheckedResults,
2724 usePostCheckedResults);
2725 }
2726 }
2727 void testGenericLoopCombinator(int nargs, Class<?>[] argTypes, MethodHandle[] preds, MethodHandle[] steps,
2728 Object[] args, Object[][] preCheckedResults, Object[][] postCheckedResults)
2729 throws Throwable {
2730 List<Class<?>> lArgTypes = Arrays.asList(argTypes);
2731 // Predicate and step handles are passed in as arguments, initializer and finalizer handles are constructed here
2732 // from the available information.
2733 MethodHandle[] inits = new MethodHandle[nargs];
2734 for (int i = 0; i < nargs; ++i) {
2735 MethodHandle h;
2736 // Initializers are meant to return whatever they are passed at a given argument position. This means that
2737 // additional arguments may have to be appended and prepended.
2738 h = MethodHandles.identity(argTypes[i]);
2739 if (i < nargs - 1) {
2740 h = MethodHandles.dropArguments(h, 1, lArgTypes.subList(i + 1, nargs));
2741 }
2742 if (i > 0) {
2743 h = MethodHandles.dropArguments(h, 0, lArgTypes.subList(0, i));
2744 }
2745 inits[i] = h;
2746 }
2747 // Finalizers are all meant to collect all of the loop-local state in a single array and return that. Local
2748 // state is passed before the loop args. Construct such a finalizer by first taking a varargsArray collector for
2749 // the number of local state arguments, and then appending the loop args as to-be-dropped arguments.
2750 MethodHandle[] finis = new MethodHandle[nargs];
2751 MethodHandle genericFini = MethodHandles.dropArguments(
2752 varargsArray(nargs).asType(methodType(Object[].class, lArgTypes)), nargs, lArgTypes);
2753 Arrays.fill(finis, genericFini);
2754 // The predicate and step handles' signatures need to be extended. They currently just accept local state args;
2755 // append possibly missing local state args and loop args using dropArguments.
2756 for (int i = 0; i < nargs; ++i) {
2757 List<Class<?>> additionalLocalStateArgTypes = lArgTypes.subList(i + 1, nargs);
2758 preds[i] = MethodHandles.dropArguments(
2759 MethodHandles.dropArguments(preds[i], i + 1, additionalLocalStateArgTypes), nargs, lArgTypes);
2760 steps[i] = MethodHandles.dropArguments(
2761 MethodHandles.dropArguments(steps[i], i + 1, additionalLocalStateArgTypes), nargs, lArgTypes);
2762 }
2763 // Iterate over all of the predicates, using only one of them at a time.
2764 for (int i = 0; i < nargs; ++i) {
2765 MethodHandle[] usePreds;
2766 if (nargs == 1) {
2767 usePreds = preds;
2768 } else {
2769 // Create an all-null preds array, and only use one predicate in this iteration. The null entries will
2770 // be substituted with true predicates by the loop combinator.
2771 usePreds = new MethodHandle[nargs];
2772 usePreds[i] = preds[i];
2773 }
2774 // Go for it.
2775 if (verbosity >= 3) {
2776 System.out.println("calling loop for argument types " + lArgTypes + " with predicate at index " + i);
2777 if (verbosity >= 5) {
2778 System.out.println("predicates: " + Arrays.asList(usePreds));
2779 }
2780 }
2781 MethodHandle[] preInits = new MethodHandle[nargs + 1];
2782 MethodHandle[] prePreds = new MethodHandle[nargs + 1];
2783 MethodHandle[] preSteps = new MethodHandle[nargs + 1];
2784 MethodHandle[] preFinis = new MethodHandle[nargs + 1];
2785 System.arraycopy(inits, 0, preInits, 1, nargs);
2786 System.arraycopy(usePreds, 0, prePreds, 0, nargs); // preds are offset by 1 for pre-checked loops
2787 System.arraycopy(steps, 0, preSteps, 1, nargs);
2788 System.arraycopy(finis, 0, preFinis, 0, nargs); // finis are also offset by 1 for pre-checked loops
2789 // Convert to clause-major form.
2790 MethodHandle[][] preClauses = new MethodHandle[nargs+1][4];
2791 MethodHandle[][] postClauses = new MethodHandle[nargs][4];
2792 toClauseMajor(preClauses, preInits, preSteps, prePreds, preFinis);
2793 toClauseMajor(postClauses, inits, steps, usePreds, finis);
2794 MethodHandle pre = MethodHandles.loop(preClauses);
2795 MethodHandle post = MethodHandles.loop(postClauses);
2796 Object[] preResults = (Object[]) pre.invokeWithArguments(args);
2797 if (verbosity >= 4) {
2798 System.out.println("pre-checked: expected " + Arrays.asList(preCheckedResults[i]) + ", actual " +
2799 Arrays.asList(preResults));
2800 }
2801 Object[] postResults = (Object[]) post.invokeWithArguments(args);
2802 if (verbosity >= 4) {
2803 System.out.println("post-checked: expected " + Arrays.asList(postCheckedResults[i]) + ", actual " +
2804 Arrays.asList(postResults));
2805 }
2806 assertArrayEquals(preCheckedResults[i], preResults);
2807 assertArrayEquals(postCheckedResults[i], postResults);
2808 }
2809 }
2810 static void toClauseMajor(MethodHandle[][] clauses, MethodHandle[] init, MethodHandle[] step, MethodHandle[] pred, MethodHandle[] fini) {
2811 for (int i = 0; i < clauses.length; ++i) {
2812 clauses[i][0] = init[i];
2813 clauses[i][1] = step[i];
2814 clauses[i][2] = pred[i];
2815 clauses[i][3] = fini[i];
2816 }
2817 }
2818 static boolean loopIntPred(int a) {
2819 if (verbosity >= 5) {
2820 System.out.println("int pred " + a + " -> " + (a < 7));
2821 }
2822 return a < 7;
2823 }
2824 static boolean loopDoublePred(int a, double b) {
2825 if (verbosity >= 5) {
2826 System.out.println("double pred (a=" + a + ") " + b + " -> " + (b > 0.5));
2827 }
2828 return b > 0.5;
2829 }
2830 static boolean loopStringPred(int a, double b, String c) {
2831 if (verbosity >= 5) {
2832 System.out.println("String pred (a=" + a + ",b=" + b + ") " + c + " -> " + (c.length() <= 9));
2833 }
2834 return c.length() <= 9;
2835 }
2836 static int loopIntStep(int a) {
2837 if (verbosity >= 5) {
2838 System.out.println("int step " + a + " -> " + (a + 1));
2839 }
2840 return a + 1;
2841 }
2842 static double loopDoubleStep(int a, double b) {
2843 if (verbosity >= 5) {
2844 System.out.println("double step (a=" + a + ") " + b + " -> " + (b / 2.0));
2845 }
2846 return b / 2.0;
2847 }
2848 static String loopStringStep(int a, double b, String c) {
2849 if (verbosity >= 5) {
2850 System.out.println("String step (a=" + a + ",b=" + b + ") " + c + " -> " + (c + a));
2851 }
2852 return c + a;
2853 }
2854
2855 @Test
2856 public void testThrowException() throws Throwable {
2857 CodeCacheOverflowProcessor.runMHTest(this::testThrowException0);
2858 }
2859
2860 public void testThrowException0() throws Throwable {
2861 if (CAN_SKIP_WORKING) return;
2862 startTest("throwException");
2863 testThrowException(int.class, new ClassCastException("testing"));
2864 testThrowException(void.class, new java.io.IOException("testing"));
2865 testThrowException(String.class, new LinkageError("testing"));
2866 }
2867
2868 void testThrowException(Class<?> returnType, Throwable thrown) throws Throwable {
2869 countTest();
2870 Class<? extends Throwable> exType = thrown.getClass();
2871 MethodHandle target = MethodHandles.throwException(returnType, exType);
2872 //System.out.println("throwing with "+target+" : "+thrown);
2873 MethodType expectedType = MethodType.methodType(returnType, exType);
2874 assertEquals(expectedType, target.type());
2875 target = target.asType(target.type().generic());
2876 Throwable caught = null;
2877 try {
2878 Object res = target.invokeExact((Object) thrown);
2879 fail("got "+res+" instead of throwing "+thrown);
2880 } catch (Throwable ex) {
2881 if (ex != thrown) {
2882 if (ex instanceof Error) throw (Error)ex;
2883 if (ex instanceof RuntimeException) throw (RuntimeException)ex;
2884 }
2885 caught = ex;
2886 }
2887 assertSame(thrown, caught);
2888 }
2889
2890 @Test
2891 public void testTryFinally() throws Throwable {
2892 CodeCacheOverflowProcessor.runMHTest(this::testTryFinally0);
2893 }
2894 public void testTryFinally0() throws Throwable {
2895 if (CAN_SKIP_WORKING) return;
2896 startTest("tryFinally");
2897 String inputMessage = "returned";
2898 String augmentedMessage = "augmented";
2899 String thrownMessage = "thrown";
2900 String rethrownMessage = "rethrown";
2901 // Test these cases:
2902 // * target returns, cleanup passes through
2903 // * target returns, cleanup augments
2904 // * target throws, cleanup augments and returns
2905 // * target throws, cleanup augments and rethrows
2906 MethodHandle target = MethodHandles.identity(String.class);
2907 MethodHandle targetThrow = MethodHandles.dropArguments(
2908 MethodHandles.throwException(String.class, Exception.class).bindTo(new Exception(thrownMessage)), 0, String.class);
2909 MethodHandle cleanupPassThrough = MethodHandles.dropArguments(MethodHandles.identity(String.class), 0,
2910 Throwable.class, String.class);
2911 MethodHandle cleanupAugment = MethodHandles.dropArguments(MethodHandles.constant(String.class, augmentedMessage),
2912 0, Throwable.class, String.class, String.class);
2913 MethodHandle cleanupCatch = MethodHandles.dropArguments(MethodHandles.constant(String.class, thrownMessage), 0,
2914 Throwable.class, String.class, String.class);
2915 MethodHandle cleanupThrow = MethodHandles.dropArguments(MethodHandles.throwException(String.class, Exception.class).
2916 bindTo(new Exception(rethrownMessage)), 0, Throwable.class, String.class, String.class);
2917 testTryFinally(target, cleanupPassThrough, inputMessage, inputMessage, false);
2918 testTryFinally(target, cleanupAugment, inputMessage, augmentedMessage, false);
2919 testTryFinally(targetThrow, cleanupCatch, inputMessage, thrownMessage, true);
2920 testTryFinally(targetThrow, cleanupThrow, inputMessage, rethrownMessage, true);
2921 // Test the same cases as above for void targets and cleanups.
2922 MethodHandles.Lookup lookup = MethodHandles.lookup();
2923 Class<?> C = this.getClass();
2924 MethodType targetType = methodType(void.class, String[].class);
2925 MethodType cleanupType = methodType(void.class, Throwable.class, String[].class);
2926 MethodHandle vtarget = lookup.findStatic(C, "vtarget", targetType);
2927 MethodHandle vtargetThrow = lookup.findStatic(C, "vtargetThrow", targetType);
2928 MethodHandle vcleanupPassThrough = lookup.findStatic(C, "vcleanupPassThrough", cleanupType);
2929 MethodHandle vcleanupAugment = lookup.findStatic(C, "vcleanupAugment", cleanupType);
2930 MethodHandle vcleanupCatch = lookup.findStatic(C, "vcleanupCatch", cleanupType);
2931 MethodHandle vcleanupThrow = lookup.findStatic(C, "vcleanupThrow", cleanupType);
2932 testTryFinally(vtarget, vcleanupPassThrough, inputMessage, inputMessage, false);
2933 testTryFinally(vtarget, vcleanupAugment, inputMessage, augmentedMessage, false);
2934 testTryFinally(vtargetThrow, vcleanupCatch, inputMessage, thrownMessage, true);
2935 testTryFinally(vtargetThrow, vcleanupThrow, inputMessage, rethrownMessage, true);
2936 }
2937 void testTryFinally(MethodHandle target, MethodHandle cleanup, String input, String msg, boolean mustCatch)
2938 throws Throwable {
2939 countTest();
2940 MethodHandle tf = MethodHandles.tryFinally(target, cleanup);
2941 String result = null;
2942 boolean isVoid = target.type().returnType() == void.class;
2943 String[] argArray = new String[]{input};
2944 try {
2945 if (isVoid) {
2946 tf.invoke(argArray);
2947 } else {
2948 result = (String) tf.invoke(input);
2949 }
2950 } catch (Throwable t) {
2951 assertTrue(mustCatch);
2952 assertEquals(msg, t.getMessage());
2953 return;
2954 }
2955 assertFalse(mustCatch);
2956 if (isVoid) {
2957 assertEquals(msg, argArray[0]);
2958 } else {
2959 assertEquals(msg, result);
2960 }
2961 }
2962 static void vtarget(String[] a) {
2963 // naught, akin to identity
2964 }
2965 static void vtargetThrow(String[] a) throws Exception {
2966 throw new Exception("thrown");
2967 }
2968 static void vcleanupPassThrough(Throwable t, String[] a) {
2969 assertNull(t);
2970 // naught, akin to identity
2971 }
2972 static void vcleanupAugment(Throwable t, String[] a) {
2973 assertNull(t);
2974 a[0] = "augmented";
2975 }
2976 static void vcleanupCatch(Throwable t, String[] a) {
2977 assertNotNull(t);
2978 a[0] = "caught";
2979 }
2980 static void vcleanupThrow(Throwable t, String[] a) throws Exception {
2981 assertNotNull(t);
2982 throw new Exception("rethrown");
2983 }
2984
2985 @Test
2986 public void testInterfaceCast() throws Throwable {
2987 CodeCacheOverflowProcessor.runMHTest(this::testInterfaceCast0);
2988 }
2989
2990 public void testInterfaceCast0() throws Throwable {
2991 if (CAN_SKIP_WORKING) return;
2992 startTest("interfaceCast");
2993 assert( (((Object)"foo") instanceof CharSequence));
2994 assert(!(((Object)"foo") instanceof Iterable));
2995 for (MethodHandle mh : new MethodHandle[]{
2996 MethodHandles.identity(String.class),
2997 MethodHandles.identity(CharSequence.class),
2998 MethodHandles.identity(Iterable.class)
2999 }) {
3000 if (verbosity > 0) System.out.println("-- mh = "+mh);
3001 for (Class<?> ctype : new Class<?>[]{
3002 Object.class, String.class, CharSequence.class,
3003 Number.class, Iterable.class
3004 }) {
3005 if (verbosity > 0) System.out.println("---- ctype = "+ctype.getName());
3006 // doret docast
3007 testInterfaceCast(mh, ctype, false, false);
3008 testInterfaceCast(mh, ctype, true, false);
3009 testInterfaceCast(mh, ctype, false, true);
3010 testInterfaceCast(mh, ctype, true, true);
3011 }
3012 }
3013 }
3014 private static Class<?> i2o(Class<?> c) {
3015 return (c.isInterface() ? Object.class : c);
3016 }
3017 public void testInterfaceCast(MethodHandle mh, Class<?> ctype,
3018 boolean doret, boolean docast) throws Throwable {
3019 MethodHandle mh0 = mh;
3020 if (verbosity > 1)
3021 System.out.println("mh="+mh+", ctype="+ctype.getName()+", doret="+doret+", docast="+docast);
3022 String normalRetVal = "normal return value";
3023 MethodType mt = mh.type();
3024 MethodType mt0 = mt;
3025 if (doret) mt = mt.changeReturnType(ctype);
3026 else mt = mt.changeParameterType(0, ctype);
3027 if (docast) mh = MethodHandles.explicitCastArguments(mh, mt);
3028 else mh = mh.asType(mt);
3029 assertEquals(mt, mh.type());
3030 MethodType mt1 = mt;
3031 // this bit is needed to make the interface types disappear for invokeWithArguments:
3032 mh = MethodHandles.explicitCastArguments(mh, mt.generic());
3033 Class<?>[] step = {
3034 mt1.parameterType(0), // param as passed to mh at first
3035 mt0.parameterType(0), // param after incoming cast
3036 mt0.returnType(), // return value before cast
3037 mt1.returnType(), // return value after outgoing cast
3038 };
3039 // where might a checkCast occur?
3040 boolean[] checkCast = new boolean[step.length];
3041 // the string value must pass each step without causing an exception
3042 if (!docast) {
3043 if (!doret) {
3044 if (step[0] != step[1])
3045 checkCast[1] = true; // incoming value is cast
3046 } else {
3047 if (step[2] != step[3])
3048 checkCast[3] = true; // outgoing value is cast
3049 }
3050 }
3051 boolean expectFail = false;
3052 for (int i = 0; i < step.length; i++) {
3053 Class<?> c = step[i];
3054 if (!checkCast[i]) c = i2o(c);
3055 if (!c.isInstance(normalRetVal)) {
3056 if (verbosity > 3)
3057 System.out.println("expect failure at step "+i+" in "+Arrays.toString(step)+Arrays.toString(checkCast));
3058 expectFail = true;
3059 break;
3060 }
3061 }
3062 countTest(!expectFail);
3063 if (verbosity > 2)
3064 System.out.println("expectFail="+expectFail+", mt="+mt);
3065 Object res;
3066 try {
3067 res = mh.invokeWithArguments(normalRetVal);
3068 } catch (Exception ex) {
3069 res = ex;
3070 }
3071 boolean sawFail = !(res instanceof String);
3072 if (sawFail != expectFail) {
3073 System.out.println("*** testInterfaceCast: mh0 = "+mh0);
3074 System.out.println(" retype using "+(docast ? "explicitCastArguments" : "asType")+" to "+mt+" => "+mh);
3075 System.out.println(" call returned "+res);
3076 System.out.println(" expected "+(expectFail ? "an exception" : normalRetVal));
3077 }
3078 if (!expectFail) {
3079 assertFalse(res.toString(), sawFail);
3080 assertEquals(normalRetVal, res);
3081 } else {
3082 assertTrue(res.toString(), sawFail);
3083 }
3084 }
3085
3086 @Test // SLOW
3087 public void testCastFailure() throws Throwable {
3088 CodeCacheOverflowProcessor.runMHTest(this::testCastFailure0);
3089 }
3090
3091 public void testCastFailure0() throws Throwable {
3092 if (CAN_SKIP_WORKING) return;
3093 startTest("testCastFailure");
3094 testCastFailure("cast/argument", 11000);
3095 if (CAN_TEST_LIGHTLY) return;
3096 testCastFailure("unbox/argument", 11000);
3097 testCastFailure("cast/return", 11000);
3098 testCastFailure("unbox/return", 11000);
3099 }
3100
3101 static class Surprise {
3102 public MethodHandle asMethodHandle() {
3103 return VALUE.bindTo(this);
3104 }
3105 Object value(Object x) {
3106 trace("value", x);
3107 if (boo != null) return boo;
3108 return x;
3109 }
3110 Object boo;
3111 void boo(Object x) { boo = x; }
3112
3113 static void trace(String x, Object y) {
3114 if (verbosity > 8) System.out.println(x+"="+y);
3115 }
3116 static Object refIdentity(Object x) { trace("ref.x", x); return x; }
3117 static Integer boxIdentity(Integer x) { trace("box.x", x); return x; }
3118 static int intIdentity(int x) { trace("int.x", x); return x; }
3119 static MethodHandle VALUE, REF_IDENTITY, BOX_IDENTITY, INT_IDENTITY;
3120 static {
3121 try {
3122 VALUE = PRIVATE.findVirtual(
3123 Surprise.class, "value",
3124 MethodType.methodType(Object.class, Object.class));
3125 REF_IDENTITY = PRIVATE.findStatic(
3126 Surprise.class, "refIdentity",
3127 MethodType.methodType(Object.class, Object.class));
3128 BOX_IDENTITY = PRIVATE.findStatic(
3129 Surprise.class, "boxIdentity",
3130 MethodType.methodType(Integer.class, Integer.class));
3131 INT_IDENTITY = PRIVATE.findStatic(
3132 Surprise.class, "intIdentity",
3133 MethodType.methodType(int.class, int.class));
3134 } catch (NoSuchMethodException | IllegalAccessException ex) {
3135 throw new RuntimeException(ex);
3136 }
3137 }
3138 }
3139
3140 @SuppressWarnings("ConvertToStringSwitch")
3141 void testCastFailure(String mode, int okCount) throws Throwable {
3142 countTest(false);
3143 if (verbosity > 2) System.out.println("mode="+mode);
3144 Surprise boo = new Surprise();
3145 MethodHandle identity = Surprise.REF_IDENTITY, surprise0 = boo.asMethodHandle(), surprise = surprise0;
3146 if (mode.endsWith("/return")) {
3147 if (mode.equals("unbox/return")) {
3148 // fail on return to ((Integer)surprise).intValue
3149 surprise = surprise.asType(MethodType.methodType(int.class, Object.class));
3150 identity = identity.asType(MethodType.methodType(int.class, Object.class));
3151 } else if (mode.equals("cast/return")) {
3152 // fail on return to (Integer)surprise
3153 surprise = surprise.asType(MethodType.methodType(Integer.class, Object.class));
3154 identity = identity.asType(MethodType.methodType(Integer.class, Object.class));
3155 }
3156 } else if (mode.endsWith("/argument")) {
3157 MethodHandle callee = null;
3158 if (mode.equals("unbox/argument")) {
3159 // fail on handing surprise to int argument
3160 callee = Surprise.INT_IDENTITY;
3161 } else if (mode.equals("cast/argument")) {
3162 // fail on handing surprise to Integer argument
3163 callee = Surprise.BOX_IDENTITY;
3164 }
3165 if (callee != null) {
3166 callee = callee.asType(MethodType.genericMethodType(1));
3167 surprise = MethodHandles.filterArguments(callee, 0, surprise);
3168 identity = MethodHandles.filterArguments(callee, 0, identity);
3169 }
3170 }
3171 assertNotSame(mode, surprise, surprise0);
3172 identity = identity.asType(MethodType.genericMethodType(1));
3173 surprise = surprise.asType(MethodType.genericMethodType(1));
3174 Object x = 42;
3175 for (int i = 0; i < okCount; i++) {
3176 Object y = identity.invokeExact(x);
3177 assertEquals(x, y);
3178 Object z = surprise.invokeExact(x);
3179 assertEquals(x, z);
3180 }
3181 boo.boo("Boo!");
3182 Object y = identity.invokeExact(x);
3183 assertEquals(x, y);
3184 try {
3185 Object z = surprise.invokeExact(x);
3186 System.out.println("Failed to throw; got z="+z);
3187 assertTrue(false);
3188 } catch (ClassCastException ex) {
3189 if (verbosity > 2)
3190 System.out.println("caught "+ex);
3191 if (verbosity > 3)
3192 ex.printStackTrace(System.out);
3193 assertTrue(true); // all is well
3194 }
3195 }
3196
3197 static Example userMethod(Object o, String s, int i) {
3198 called("userMethod", o, s, i);
3199 return null;
3200 }
3201
3202 @Test
3203 public void testUserClassInSignature() throws Throwable {
3204 CodeCacheOverflowProcessor.runMHTest(this::testUserClassInSignature0);
3205 }
3206
3207 public void testUserClassInSignature0() throws Throwable {
3208 if (CAN_SKIP_WORKING) return;
3209 startTest("testUserClassInSignature");
3210 Lookup lookup = MethodHandles.lookup();
3211 String name; MethodType mt; MethodHandle mh;
3212 Object[] args;
3213
3214 // Try a static method.
3215 name = "userMethod";
3216 mt = MethodType.methodType(Example.class, Object.class, String.class, int.class);
3217 mh = lookup.findStatic(lookup.lookupClass(), name, mt);
3218 assertEquals(mt, mh.type());
3219 assertEquals(Example.class, mh.type().returnType());
3220 args = randomArgs(mh.type().parameterArray());
3221 mh.invokeWithArguments(args);
3222 assertCalled(name, args);
3223
3224 // Try a virtual method.
3225 name = "v2";
3226 mt = MethodType.methodType(Object.class, Object.class, int.class);
3227 mh = lookup.findVirtual(Example.class, name, mt);
3228 assertEquals(mt, mh.type().dropParameterTypes(0,1));
3229 assertTrue(mh.type().parameterList().contains(Example.class));
3230 args = randomArgs(mh.type().parameterArray());
3231 mh.invokeWithArguments(args);
3232 assertCalled(name, args);
3233 }
3234
3235 static void runForRunnable() {
3236 called("runForRunnable");
3237 }
3238 public interface Fooable {
3239 // overloads:
3240 Object foo(Object x, String y);
3241 List<?> foo(String x, int y);
3242 Object foo(String x);
3243 }
3244 static Object fooForFooable(String x, Object... y) {
3245 return called("fooForFooable/"+x, y);
3246 }
3247 @SuppressWarnings("serial") // not really a public API, just a test case
3248 public static class MyCheckedException extends Exception {
3249 }
3250 public interface WillThrow {
3251 void willThrow() throws MyCheckedException;
3252 }
3253 /*non-public*/ interface PrivateRunnable {
3254 public void run();
3255 }
3256
3257 @Test
3258 public void testAsInterfaceInstance() throws Throwable {
3259 CodeCacheOverflowProcessor.runMHTest(this::testAsInterfaceInstance0);
3260 }
3261
3262 public void testAsInterfaceInstance0() throws Throwable {
3263 if (CAN_SKIP_WORKING) return;
3264 startTest("asInterfaceInstance");
3265 Lookup lookup = MethodHandles.lookup();
3266 // test typical case: Runnable.run
3267 {
3268 countTest();
3269 if (verbosity >= 2) System.out.println("Runnable");
3270 MethodType mt = MethodType.methodType(void.class);
3271 MethodHandle mh = lookup.findStatic(MethodHandlesTest.class, "runForRunnable", mt);
3272 Runnable proxy = MethodHandleProxies.asInterfaceInstance(Runnable.class, mh);
3273 proxy.run();
3274 assertCalled("runForRunnable");
3275 }
3276 // well known single-name overloaded interface: Appendable.append
3277 {
3278 countTest();
3279 if (verbosity >= 2) System.out.println("Appendable");
3280 ArrayList<List<?>> appendResults = new ArrayList<>();
3281 MethodHandle append = lookup.bind(appendResults, "add", MethodType.methodType(boolean.class, Object.class));
3282 append = append.asType(MethodType.methodType(void.class, List.class)); // specialize the type
3283 MethodHandle asList = lookup.findStatic(Arrays.class, "asList", MethodType.methodType(List.class, Object[].class));
3284 MethodHandle mh = MethodHandles.filterReturnValue(asList, append).asVarargsCollector(Object[].class);
3285 Appendable proxy = MethodHandleProxies.asInterfaceInstance(Appendable.class, mh);
3286 proxy.append("one");
3287 proxy.append("two", 3, 4);
3288 proxy.append('5');
3289 assertEquals(Arrays.asList(Arrays.asList("one"),
3290 Arrays.asList("two", 3, 4),
3291 Arrays.asList('5')),
3292 appendResults);
3293 if (verbosity >= 3) System.out.println("appendResults="+appendResults);
3294 appendResults.clear();
3295 Formatter formatter = new Formatter(proxy);
3296 String fmt = "foo str=%s char='%c' num=%d";
3297 Object[] fmtArgs = { "str!", 'C', 42 };
3298 String expect = String.format(fmt, fmtArgs);
3299 formatter.format(fmt, fmtArgs);
3300 String actual = "";
3301 if (verbosity >= 3) System.out.println("appendResults="+appendResults);
3302 for (List<?> l : appendResults) {
3303 Object x = l.get(0);
3304 switch (l.size()) {
3305 case 1: actual += x; continue;
3306 case 3: actual += ((String)x).substring((int)(Object)l.get(1), (int)(Object)l.get(2)); continue;
3307 }
3308 actual += l;
3309 }
3310 if (verbosity >= 3) System.out.println("expect="+expect);
3311 if (verbosity >= 3) System.out.println("actual="+actual);
3312 assertEquals(expect, actual);
3313 }
3314 // test case of an single name which is overloaded: Fooable.foo(...)
3315 {
3316 if (verbosity >= 2) System.out.println("Fooable");
3317 MethodHandle mh = lookup.findStatic(MethodHandlesTest.class, "fooForFooable",
3318 MethodType.methodType(Object.class, String.class, Object[].class));
3319 Fooable proxy = MethodHandleProxies.asInterfaceInstance(Fooable.class, mh);
3320 for (Method m : Fooable.class.getDeclaredMethods()) {
3321 countTest();
3322 assertSame("foo", m.getName());
3323 if (verbosity > 3)
3324 System.out.println("calling "+m);
3325 MethodHandle invoker = lookup.unreflect(m);
3326 MethodType mt = invoker.type();
3327 Class<?>[] types = mt.parameterArray();
3328 types[0] = int.class; // placeholder
3329 Object[] args = randomArgs(types);
3330 args[0] = proxy;
3331 if (verbosity > 3)
3332 System.out.println("calling "+m+" on "+Arrays.asList(args));
3333 Object result = invoker.invokeWithArguments(args);
3334 if (verbosity > 4)
3335 System.out.println("result = "+result);
3336 String name = "fooForFooable/"+args[1];
3337 Object[] argTail = Arrays.copyOfRange(args, 2, args.length);
3338 assertCalled(name, argTail);
3339 assertEquals(result, logEntry(name, argTail));
3340 }
3341 }
3342 // test processing of thrown exceptions:
3343 for (Throwable ex : new Throwable[] { new NullPointerException("ok"),
3344 new InternalError("ok"),
3345 new Throwable("fail"),
3346 new Exception("fail"),
3347 new MyCheckedException()
3348 }) {
3349 MethodHandle mh = MethodHandles.throwException(void.class, Throwable.class);
3350 mh = MethodHandles.insertArguments(mh, 0, ex);
3351 WillThrow proxy = MethodHandleProxies.asInterfaceInstance(WillThrow.class, mh);
3352 try {
3353 countTest();
3354 proxy.willThrow();
3355 System.out.println("Failed to throw: "+ex);
3356 assertTrue(false);
3357 } catch (Throwable ex1) {
3358 if (verbosity > 3) {
3359 System.out.println("throw "+ex);
3360 System.out.println("catch "+(ex == ex1 ? "UNWRAPPED" : ex1));
3361 }
3362 if (ex instanceof RuntimeException ||
3363 ex instanceof Error) {
3364 assertSame("must pass unchecked exception out without wrapping", ex, ex1);
3365 } else if (ex instanceof MyCheckedException) {
3366 assertSame("must pass declared exception out without wrapping", ex, ex1);
3367 } else {
3368 assertNotSame("must pass undeclared checked exception with wrapping", ex, ex1);
3369 if (!(ex1 instanceof UndeclaredThrowableException) || ex1.getCause() != ex) {
3370 ex1.printStackTrace(System.out);
3371 }
3372 assertSame(ex, ex1.getCause());
3373 UndeclaredThrowableException utex = (UndeclaredThrowableException) ex1;
3374 }
3375 }
3376 }
3377 // Test error checking on bad interfaces:
3378 for (Class<?> nonSMI : new Class<?>[] { Object.class,
3379 String.class,
3380 CharSequence.class,
3381 java.io.Serializable.class,
3382 PrivateRunnable.class,
3383 Example.class }) {
3384 if (verbosity > 2) System.out.println(nonSMI.getName());
3385 try {
3386 countTest(false);
3387 MethodHandleProxies.asInterfaceInstance(nonSMI, varargsArray(0));
3388 assertTrue("Failed to throw on "+nonSMI.getName(), false);
3389 } catch (IllegalArgumentException ex) {
3390 if (verbosity > 2) System.out.println(nonSMI.getSimpleName()+": "+ex);
3391 // Object: java.lang.IllegalArgumentException:
3392 // not a public interface: java.lang.Object
3393 // String: java.lang.IllegalArgumentException:
3394 // not a public interface: java.lang.String
3395 // CharSequence: java.lang.IllegalArgumentException:
3396 // not a single-method interface: java.lang.CharSequence
3397 // Serializable: java.lang.IllegalArgumentException:
3398 // not a single-method interface: java.io.Serializable
3399 // PrivateRunnable: java.lang.IllegalArgumentException:
3400 // not a public interface: test.java.lang.invoke.MethodHandlesTest$PrivateRunnable
3401 // Example: java.lang.IllegalArgumentException:
3402 // not a public interface: test.java.lang.invoke.MethodHandlesTest$Example
3403 }
3404 }
3405 // Test error checking on interfaces with the wrong method type:
3406 for (Class<?> intfc : new Class<?>[] { Runnable.class /*arity 0*/,
3407 Fooable.class /*arity 1 & 2*/ }) {
3408 int badArity = 1; // known to be incompatible
3409 if (verbosity > 2) System.out.println(intfc.getName());
3410 try {
3411 countTest(false);
3412 MethodHandleProxies.asInterfaceInstance(intfc, varargsArray(badArity));
3413 assertTrue("Failed to throw on "+intfc.getName(), false);
3414 } catch (WrongMethodTypeException ex) {
3415 if (verbosity > 2) System.out.println(intfc.getSimpleName()+": "+ex);
3416 // Runnable: java.lang.invoke.WrongMethodTypeException:
3417 // cannot convert MethodHandle(Object)Object[] to ()void
3418 // Fooable: java.lang.invoke.WrongMethodTypeException:
3419 // cannot convert MethodHandle(Object)Object[] to (Object,String)Object
3420 }
3421 }
3422 }
3423
3424 @Test
3425 public void testRunnableProxy() throws Throwable {
3426 CodeCacheOverflowProcessor.runMHTest(this::testRunnableProxy0);
3427 }
3428
3429 public void testRunnableProxy0() throws Throwable {
3430 if (CAN_SKIP_WORKING) return;
3431 startTest("testRunnableProxy");
3432 MethodHandles.Lookup lookup = MethodHandles.lookup();
3433 MethodHandle run = lookup.findStatic(lookup.lookupClass(), "runForRunnable", MethodType.methodType(void.class));
3434 Runnable r = MethodHandleProxies.asInterfaceInstance(Runnable.class, run);
3435 testRunnableProxy(r);
3436 assertCalled("runForRunnable");
3437 }
3438 private static void testRunnableProxy(Runnable r) {
3439 //7058630: JSR 292 method handle proxy violates contract for Object methods
3440 r.run();
3441 Object o = r;
3442 r = null;
3443 boolean eq = (o == o);
3444 int hc = System.identityHashCode(o);
3445 String st = o.getClass().getName() + "@" + Integer.toHexString(hc);
3446 Object expect = Arrays.asList(st, eq, hc);
3447 if (verbosity >= 2) System.out.println("expect st/eq/hc = "+expect);
3448 Object actual = Arrays.asList(o.toString(), o.equals(o), o.hashCode());
3449 if (verbosity >= 2) System.out.println("actual st/eq/hc = "+actual);
3450 assertEquals(expect, actual);
3451 }
3452 }
3453 // Local abbreviated copy of sun.invoke.util.ValueConversions
3454 // This guy tests access from outside the same package member, but inside
3455 // the package itself.
3456 class ValueConversions {
3457 private static final Lookup IMPL_LOOKUP = MethodHandles.lookup();
3458 private static final Object[] NO_ARGS_ARRAY = {};
3459 private static Object[] makeArray(Object... args) { return args; }
3460 private static Object[] array() { return NO_ARGS_ARRAY; }
3461 private static Object[] array(Object a0)
3462 { return makeArray(a0); }
3463 private static Object[] array(Object a0, Object a1)
3464 { return makeArray(a0, a1); }
3465 private static Object[] array(Object a0, Object a1, Object a2)
3466 { return makeArray(a0, a1, a2); }
3467 private static Object[] array(Object a0, Object a1, Object a2, Object a3)
3468 { return makeArray(a0, a1, a2, a3); }
3469 private static Object[] array(Object a0, Object a1, Object a2, Object a3,
3470 Object a4)
3471 { return makeArray(a0, a1, a2, a3, a4); }
3472 private static Object[] array(Object a0, Object a1, Object a2, Object a3,
3473 Object a4, Object a5)
3474 { return makeArray(a0, a1, a2, a3, a4, a5); }
3475 private static Object[] array(Object a0, Object a1, Object a2, Object a3,
3476 Object a4, Object a5, Object a6)
3477 { return makeArray(a0, a1, a2, a3, a4, a5, a6); }
3478 private static Object[] array(Object a0, Object a1, Object a2, Object a3,
3479 Object a4, Object a5, Object a6, Object a7)
3480 { return makeArray(a0, a1, a2, a3, a4, a5, a6, a7); }
3481 private static Object[] array(Object a0, Object a1, Object a2, Object a3,
3482 Object a4, Object a5, Object a6, Object a7,
3483 Object a8)
3484 { return makeArray(a0, a1, a2, a3, a4, a5, a6, a7, a8); }
3485 private static Object[] array(Object a0, Object a1, Object a2, Object a3,
3486 Object a4, Object a5, Object a6, Object a7,
3487 Object a8, Object a9)
3488 { return makeArray(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9); }
3489 static MethodHandle[] makeArrays() {
3490 ArrayList<MethodHandle> arrays = new ArrayList<>();
3491 MethodHandles.Lookup lookup = IMPL_LOOKUP;
3492 for (;;) {
3493 int nargs = arrays.size();
3494 MethodType type = MethodType.genericMethodType(nargs).changeReturnType(Object[].class);
3495 String name = "array";
3496 MethodHandle array = null;
3497 try {
3498 array = lookup.findStatic(ValueConversions.class, name, type);
3499 } catch (ReflectiveOperationException ex) {
3500 // break from loop!
3501 }
3502 if (array == null) break;
3503 arrays.add(array);
3504 }
3505 assertTrue(arrays.size() == 11); // current number of methods
3506 return arrays.toArray(new MethodHandle[0]);
3507 }
3508 static final MethodHandle[] ARRAYS = makeArrays();
3509
3510 /** Return a method handle that takes the indicated number of Object
3511 * arguments and returns an Object array of them, as if for varargs.
3512 */
3513 public static MethodHandle varargsArray(int nargs) {
3514 if (nargs < ARRAYS.length)
3515 return ARRAYS[nargs];
3516 return MethodHandles.identity(Object[].class).asCollector(Object[].class, nargs);
3517 }
3518 public static MethodHandle varargsArray(Class<?> arrayType, int nargs) {
3519 Class<?> elemType = arrayType.getComponentType();
3520 MethodType vaType = MethodType.methodType(arrayType, Collections.<Class<?>>nCopies(nargs, elemType));
3521 MethodHandle mh = varargsArray(nargs);
3522 if (arrayType != Object[].class)
3523 mh = MethodHandles.filterReturnValue(mh, CHANGE_ARRAY_TYPE.bindTo(arrayType));
3524 return mh.asType(vaType);
3525 }
3526 static Object changeArrayType(Class<?> arrayType, Object[] a) {
3527 Class<?> elemType = arrayType.getComponentType();
3528 if (!elemType.isPrimitive())
3529 return Arrays.copyOf(a, a.length, arrayType.asSubclass(Object[].class));
3530 Object b = java.lang.reflect.Array.newInstance(elemType, a.length);
3531 for (int i = 0; i < a.length; i++)
3532 java.lang.reflect.Array.set(b, i, a[i]);
3533 return b;
3534 }
3535 private static final MethodHandle CHANGE_ARRAY_TYPE;
3536 static {
3537 try {
3538 CHANGE_ARRAY_TYPE = IMPL_LOOKUP.findStatic(ValueConversions.class, "changeArrayType",
3539 MethodType.methodType(Object.class, Class.class, Object[].class));
3540 } catch (NoSuchMethodException | IllegalAccessException ex) {
3541 Error err = new InternalError("uncaught exception");
3542 err.initCause(ex);
3543 throw err;
3544 }
3545 }
3546
3547 private static final List<Object> NO_ARGS_LIST = Arrays.asList(NO_ARGS_ARRAY);
3548 private static List<Object> makeList(Object... args) { return Arrays.asList(args); }
3549 private static List<Object> list() { return NO_ARGS_LIST; }
3550 private static List<Object> list(Object a0)
3551 { return makeList(a0); }
3552 private static List<Object> list(Object a0, Object a1)
3553 { return makeList(a0, a1); }
3554 private static List<Object> list(Object a0, Object a1, Object a2)
3555 { return makeList(a0, a1, a2); }
3556 private static List<Object> list(Object a0, Object a1, Object a2, Object a3)
3557 { return makeList(a0, a1, a2, a3); }
3558 private static List<Object> list(Object a0, Object a1, Object a2, Object a3,
3559 Object a4)
3560 { return makeList(a0, a1, a2, a3, a4); }
3561 private static List<Object> list(Object a0, Object a1, Object a2, Object a3,
3562 Object a4, Object a5)
3563 { return makeList(a0, a1, a2, a3, a4, a5); }
3564 private static List<Object> list(Object a0, Object a1, Object a2, Object a3,
3565 Object a4, Object a5, Object a6)
3566 { return makeList(a0, a1, a2, a3, a4, a5, a6); }
3567 private static List<Object> list(Object a0, Object a1, Object a2, Object a3,
3568 Object a4, Object a5, Object a6, Object a7)
3569 { return makeList(a0, a1, a2, a3, a4, a5, a6, a7); }
3570 private static List<Object> list(Object a0, Object a1, Object a2, Object a3,
3571 Object a4, Object a5, Object a6, Object a7,
3572 Object a8)
3573 { return makeList(a0, a1, a2, a3, a4, a5, a6, a7, a8); }
3574 private static List<Object> list(Object a0, Object a1, Object a2, Object a3,
3575 Object a4, Object a5, Object a6, Object a7,
3576 Object a8, Object a9)
3577 { return makeList(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9); }
3578 static MethodHandle[] makeLists() {
3579 ArrayList<MethodHandle> lists = new ArrayList<>();
3580 MethodHandles.Lookup lookup = IMPL_LOOKUP;
3581 for (;;) {
3582 int nargs = lists.size();
3583 MethodType type = MethodType.genericMethodType(nargs).changeReturnType(List.class);
3584 String name = "list";
3585 MethodHandle list = null;
3586 try {
3587 list = lookup.findStatic(ValueConversions.class, name, type);
3588 } catch (ReflectiveOperationException ex) {
3589 // break from loop!
3590 }
3591 if (list == null) break;
3592 lists.add(list);
3593 }
3594 assertTrue(lists.size() == 11); // current number of methods
3595 return lists.toArray(new MethodHandle[0]);
3596 }
3597 static final MethodHandle[] LISTS = makeLists();
3598 static final MethodHandle AS_LIST;
3599 static {
3600 try {
3601 AS_LIST = IMPL_LOOKUP.findStatic(Arrays.class, "asList", MethodType.methodType(List.class, Object[].class));
3602 } catch (NoSuchMethodException | IllegalAccessException ex) { throw new RuntimeException(ex); }
3603 }
3604
3605 /** Return a method handle that takes the indicated number of Object
3606 * arguments and returns List.
3607 */
3608 public static MethodHandle varargsList(int nargs) {
3609 if (nargs < LISTS.length)
3610 return LISTS[nargs];
3611 return AS_LIST.asCollector(Object[].class, nargs);
3612 }
3613 }
3614 // This guy tests access from outside the same package member, but inside
3615 // the package itself.
3616 class PackageSibling {
3617 static Lookup lookup() {
3618 return MethodHandles.lookup();
3619 }
3620 }