--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/lang/invoke/RicochetTest.java Thu May 12 19:27:49 2011 -0700
@@ -0,0 +1,582 @@
+/*
+ * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/* @test
+ * @summary unit tests for recursive method handles
+ * @run junit/othervm -DRicochetTest.MAX_ARITY=255 test.java.lang.invoke.RicochetTest
+ */
+
+package test.java.lang.invoke;
+
+import java.lang.invoke.*;
+import java.util.*;
+import org.junit.*;
+import static java.lang.invoke.MethodType.*;
+import static java.lang.invoke.MethodHandles.*;
+import static org.junit.Assert.*;
+import static org.junit.Assume.*;
+
+
+/**
+ *
+ * @author jrose
+ */
+public class RicochetTest {
+ private static final Class CLASS = RicochetTest.class;
+ private static final int MAX_ARITY = Integer.getInteger(CLASS.getSimpleName()+".MAX_ARITY", 40);
+
+ public static void main(String... av) throws Throwable {
+ RicochetTest test = new RicochetTest();
+ if (av.length > 0) test.testOnly = Arrays.asList(av).toString();
+ if (REPEAT == 1 || test.testOnly != null) {
+ test.testAll();
+ if (test.testOnlyTests == null) throw new RuntimeException("no matching test: "+test.testOnly);
+ } else if (REPEAT == 0) {
+ org.junit.runner.JUnitCore.runClasses(RicochetTest.class);
+ } else {
+ verbose(1, "REPEAT="+REPEAT);
+ for (int i = 0; i < REPEAT; i++) {
+ test.testRepetition = (i+1);
+ verbose(0, "[#"+test.testRepetition+"]");
+ test.testAll();
+ }
+ }
+ }
+ int testRepetition;
+
+ public void testAll() throws Throwable {
+ testNull();
+ testBoxInteger();
+ testFilterReturnValue();
+ testFilterObject();
+ testBoxLong();
+ testFilterInteger();
+ testIntSpreads();
+ testByteSpreads();
+ testLongSpreads();
+ testIntCollects();
+ testReturns();
+ }
+
+ @Test
+ public void testNull() throws Throwable {
+ if (testRepetition > (1+REPEAT/100)) return; // trivial test
+ if (!startTest("testNull")) return;
+ assertEquals(opI(37), opI.invokeWithArguments(37));
+ assertEqualFunction(opI, opI);
+ }
+
+ @Test
+ public void testBoxInteger() throws Throwable {
+ if (!startTest("testBoxInteger")) return;
+ assertEqualFunction(opI, opI.asType(opL_I.type()).asType(opI.type()));
+ }
+
+ @Test
+ public void testFilterReturnValue() throws Throwable {
+ if (!startTest("testFilterReturnValue")) return;
+ int[] ints = { 12, 23, 34, 45, 56, 67, 78, 89 };
+ Object res = list8ints.invokeExact(ints[0], ints[1], ints[2], ints[3], ints[4], ints[5], ints[6], ints[7]);
+ assertEquals(Arrays.toString(ints), res.toString());
+ MethodHandle idreturn = filterReturnValue(list8ints, identity(Object.class));
+ res = idreturn.invokeExact(ints[0], ints[1], ints[2], ints[3], ints[4], ints[5], ints[6], ints[7]);
+ assertEquals(Arrays.toString(ints), res.toString());
+ MethodHandle add0 = addL.bindTo(0);
+ assertEqualFunction(filterReturnValue(opL2, add0), opL2);
+ }
+
+ @Test
+ public void testFilterObject() throws Throwable {
+ if (!startTest("testFilterObject")) return;
+ MethodHandle add0 = addL.bindTo(0);
+ assertEqualFunction(sequence(opL2, add0), opL2);
+ int bump13 = -13; // value near 20 works as long as test values are near [-80..80]
+ MethodHandle add13 = addL.bindTo(bump13);
+ MethodHandle add13_0 = addL.bindTo(opI2(bump13, 0));
+ MethodHandle add13_1 = addL.bindTo(opI2(0, bump13));
+ assertEqualFunction(sequence(opL2, add13_0),
+ filterArguments(opL2, 0, add13));
+ assertEqualFunction(sequence(opL2, add13_1),
+ filterArguments(opL2, 1, add13));
+ System.out.println("[testFilterObject done]");
+ }
+
+ @Test
+ public void testBoxLong() throws Throwable {
+ if (!startTest("testBoxLong")) return;
+ assertEqualFunction(opJ, opJ.asType(opL_J.type()).asType(opJ.type()));
+ }
+
+ @Test
+ public void testFilterInteger() throws Throwable {
+ if (!startTest("testFilterInteger")) return;
+ assertEqualFunction(opI, sequence(convI_L, opL_I));
+ }
+
+ @Test
+ public void testIntSpreads() throws Throwable {
+ if (!startTest("testIntSpreads")) return;
+ MethodHandle id = identity(int[].class);
+ final int MAX = MAX_ARITY-2; // 253+1 would cause parameter overflow with 'this' added
+ for (int nargs = 0; nargs <= MAX; nargs++) {
+ if (nargs > 30 && nargs < MAX-20) nargs += 10;
+ int[] args = new int[nargs];
+ for (int j = 0; j < args.length; j++) args[j] = (int)(j + 11);
+ //System.out.println("testIntSpreads "+Arrays.toString(args));
+ int[] args1 = (int[]) id.invokeExact(args);
+ assertArrayEquals(args, args1);
+ MethodHandle coll = id.asCollector(int[].class, nargs);
+ int[] args2 = args;
+ switch (nargs) {
+ case 0: args2 = (int[]) coll.invokeExact(); break;
+ case 1: args2 = (int[]) coll.invokeExact(args[0]); break;
+ case 2: args2 = (int[]) coll.invokeExact(args[0], args[1]); break;
+ case 3: args2 = (int[]) coll.invokeExact(args[0], args[1], args[2]); break;
+ case 4: args2 = (int[]) coll.invokeExact(args[0], args[1], args[2], args[3]); break;
+ case 5: args2 = (int[]) coll.invokeExact(args[0], args[1], args[2], args[3], args[4]); break;
+ }
+ assertArrayEquals(args, args2);
+ MethodHandle mh = coll.asSpreader(int[].class, nargs);
+ int[] args3 = (int[]) mh.invokeExact(args);
+ assertArrayEquals(args, args3);
+ }
+ }
+
+ @Test
+ public void testByteSpreads() throws Throwable {
+ if (!startTest("testByteSpreads")) return;
+ MethodHandle id = identity(byte[].class);
+ final int MAX = MAX_ARITY-2; // 253+1 would cause parameter overflow with 'this' added
+ for (int nargs = 0; nargs <= MAX; nargs++) {
+ if (nargs > 30 && nargs < MAX-20) nargs += 10;
+ byte[] args = new byte[nargs];
+ for (int j = 0; j < args.length; j++) args[j] = (byte)(j + 11);
+ //System.out.println("testByteSpreads "+Arrays.toString(args));
+ byte[] args1 = (byte[]) id.invokeExact(args);
+ assertArrayEquals(args, args1);
+ MethodHandle coll = id.asCollector(byte[].class, nargs);
+ byte[] args2 = args;
+ switch (nargs) {
+ case 0: args2 = (byte[]) coll.invokeExact(); break;
+ case 1: args2 = (byte[]) coll.invokeExact(args[0]); break;
+ case 2: args2 = (byte[]) coll.invokeExact(args[0], args[1]); break;
+ case 3: args2 = (byte[]) coll.invokeExact(args[0], args[1], args[2]); break;
+ case 4: args2 = (byte[]) coll.invokeExact(args[0], args[1], args[2], args[3]); break;
+ case 5: args2 = (byte[]) coll.invokeExact(args[0], args[1], args[2], args[3], args[4]); break;
+ }
+ assertArrayEquals(args, args2);
+ MethodHandle mh = coll.asSpreader(byte[].class, nargs);
+ byte[] args3 = (byte[]) mh.invokeExact(args);
+ assertArrayEquals(args, args3);
+ }
+ }
+
+ @Test
+ public void testLongSpreads() throws Throwable {
+ if (!startTest("testLongSpreads")) return;
+ MethodHandle id = identity(long[].class);
+ final int MAX = (MAX_ARITY - 2) / 2; // 253/2+1 would cause parameter overflow with 'this' added
+ for (int nargs = 0; nargs <= MAX; nargs++) {
+ if (nargs > 30 && nargs < MAX-20) nargs += 10;
+ long[] args = new long[nargs];
+ for (int j = 0; j < args.length; j++) args[j] = (long)(j + 11);
+ //System.out.println("testLongSpreads "+Arrays.toString(args));
+ long[] args1 = (long[]) id.invokeExact(args);
+ assertArrayEquals(args, args1);
+ MethodHandle coll = id.asCollector(long[].class, nargs);
+ long[] args2 = args;
+ switch (nargs) {
+ case 0: args2 = (long[]) coll.invokeExact(); break;
+ case 1: args2 = (long[]) coll.invokeExact(args[0]); break;
+ case 2: args2 = (long[]) coll.invokeExact(args[0], args[1]); break;
+ case 3: args2 = (long[]) coll.invokeExact(args[0], args[1], args[2]); break;
+ case 4: args2 = (long[]) coll.invokeExact(args[0], args[1], args[2], args[3]); break;
+ case 5: args2 = (long[]) coll.invokeExact(args[0], args[1], args[2], args[3], args[4]); break;
+ }
+ assertArrayEquals(args, args2);
+ MethodHandle mh = coll.asSpreader(long[].class, nargs);
+ long[] args3 = (long[]) mh.invokeExact(args);
+ assertArrayEquals(args, args3);
+ }
+ }
+
+ @Test
+ public void testIntCollects() throws Throwable {
+ if (!startTest("testIntCollects")) return;
+ for (MethodHandle lister : INT_LISTERS) {
+ int outputs = lister.type().parameterCount();
+ for (int collects = 0; collects <= Math.min(outputs, INT_COLLECTORS.length-1); collects++) {
+ int inputs = outputs - 1 + collects;
+ if (inputs < 0) continue;
+ for (int pos = 0; pos + collects <= inputs; pos++) {
+ MethodHandle collector = INT_COLLECTORS[collects];
+ int[] args = new int[inputs];
+ int ap = 0, arg = 31;
+ for (int i = 0; i < pos; i++)
+ args[ap++] = arg++ + 0;
+ for (int i = 0; i < collects; i++)
+ args[ap++] = arg++ + 10;
+ while (ap < args.length)
+ args[ap++] = arg++ + 20;
+ // calculate piecemeal:
+ //System.out.println("testIntCollects "+Arrays.asList(lister, pos, collector)+" on "+Arrays.toString(args));
+ int[] collargs = Arrays.copyOfRange(args, pos, pos+collects);
+ int coll = (int) collector.asSpreader(int[].class, collargs.length).invokeExact(collargs);
+ int[] listargs = Arrays.copyOfRange(args, 0, outputs);
+ System.arraycopy(args, pos+collects, listargs, pos+1, outputs - (pos+1));
+ listargs[pos] = coll;
+ //System.out.println(" coll="+coll+" listargs="+Arrays.toString(listargs));
+ Object expect = lister.asSpreader(int[].class, listargs.length).invokeExact(listargs);
+ //System.out.println(" expect="+expect);
+
+ // now use the combined MH, and test the output:
+ MethodHandle mh = collectArguments(lister, pos, INT_COLLECTORS[collects]);
+ if (mh == null) continue; // no infix collection, yet
+ assert(mh.type().parameterCount() == inputs);
+ Object observe = mh.asSpreader(int[].class, args.length).invokeExact(args);
+ assertEquals(expect, observe);
+ }
+ }
+ }
+ }
+
+ private static MethodHandle collectArguments(MethodHandle lister, int pos, MethodHandle collector) {
+ int collects = collector.type().parameterCount();
+ int outputs = lister.type().parameterCount();
+ if (pos == outputs - 1)
+ return MethodHandles.filterArguments(lister, pos,
+ collector.asSpreader(int[].class, collects))
+ .asCollector(int[].class, collects);
+ //return MethodHandles.collectArguments(lister, pos, collector); //no such animal
+ return null;
+ }
+
+ private static final Class<?>[] RETURN_TYPES = {
+ Object.class, String.class, Integer.class,
+ int.class, long.class,
+ boolean.class, byte.class, char.class, short.class,
+ float.class, double.class,
+ void.class,
+ };
+
+ @Test
+ public void testReturns() throws Throwable {
+ if (!startTest("testReturns")) return;
+ // fault injection:
+ int faultCount = 0; // total of 1296 tests
+ faultCount = Integer.getInteger("testReturns.faultCount", 0);
+ for (Class<?> ret : RETURN_TYPES) {
+ // make a complicated identity function and pass something through it
+ System.out.println(ret.getSimpleName());
+ Class<?> vret = (ret == void.class) ? Void.class : ret;
+ MethodHandle id = // (vret)->ret
+ identity(vret).asType(methodType(ret, vret));
+ final int LENGTH = 4;
+ int[] index = {0};
+ Object vals = java.lang.reflect.Array.newInstance(vret, LENGTH);
+ MethodHandle indexGetter = //()->int
+ insertArguments(arrayElementGetter(index.getClass()), 0, index, 0);
+ MethodHandle valSelector = // (int)->vret
+ arrayElementGetter(vals.getClass()).bindTo(vals);
+ MethodHandle valGetter = // ()->vret
+ foldArguments(valSelector, indexGetter);
+ if (ret != void.class) {
+ for (int i = 0; i < LENGTH; i++) {
+ Object val = (i + 50);
+ if (ret == boolean.class) val = (i % 3 == 0);
+ if (ret == String.class) val = "#"+i;
+ if (ret == char.class) val = (char)('a'+i);
+ if (ret == byte.class) val = (byte)~i;
+ if (ret == short.class) val = (short)(1<<i);
+ java.lang.reflect.Array.set(vals, i, val);
+ }
+ }
+ for (int i = 0; i < LENGTH; i++) {
+ Object val = java.lang.reflect.Array.get(vals, i);
+ System.out.println(i+" => "+val);
+ index[0] = i;
+ if (--faultCount == 0) index[0] ^= 1;
+ Object x = valGetter.invokeWithArguments();
+ assertEquals(val, x);
+ // make a return-filter call: x = id(valGetter())
+ if (--faultCount == 0) index[0] ^= 1;
+ x = filterReturnValue(valGetter, id).invokeWithArguments();
+ assertEquals(val, x);
+ // make a filter call: x = id(*,valGetter(),*)
+ for (int len = 1; len <= 4; len++) {
+ for (int pos = 0; pos < len; pos++) {
+ MethodHandle proj = id; // lambda(..., vret x,...){x}
+ for (int j = 0; j < len; j++) {
+ if (j == pos) continue;
+ proj = dropArguments(proj, j, Object.class);
+ }
+ assert(proj.type().parameterCount() == len);
+ // proj: (Object*, pos: vret, Object*)->ret
+ assertEquals(vret, proj.type().parameterType(pos));
+ MethodHandle vgFilter = dropArguments(valGetter, 0, Object.class);
+ if (--faultCount == 0) index[0] ^= 1;
+ x = filterArguments(proj, pos, vgFilter).invokeWithArguments(new Object[len]);
+ assertEquals(val, x);
+ }
+ }
+ // make a fold call:
+ for (int len = 0; len <= 4; len++) {
+ for (int fold = 0; fold <= len; fold++) {
+ MethodHandle proj = id; // lambda(ret x, ...){x}
+ if (ret == void.class) proj = constant(Object.class, null);
+ int arg0 = (ret == void.class ? 0 : 1);
+ for (int j = 0; j < len; j++) {
+ proj = dropArguments(proj, arg0, Object.class);
+ }
+ assert(proj.type().parameterCount() == arg0 + len);
+ // proj: (Object*, pos: vret, Object*)->ret
+ if (arg0 != 0) assertEquals(vret, proj.type().parameterType(0));
+ MethodHandle vgFilter = valGetter.asType(methodType(ret));
+ for (int j = 0; j < fold; j++) {
+ vgFilter = dropArguments(vgFilter, j, Object.class);
+ }
+ x = foldArguments(proj, vgFilter).invokeWithArguments(new Object[len]);
+ if (--faultCount == 0) index[0] ^= 1;
+ assertEquals(val, x);
+ }
+ }
+ }
+ }
+ //System.out.println("faultCount="+faultCount);
+ }
+
+ private static MethodHandle sequence(MethodHandle mh1, MethodHandle... mhs) {
+ MethodHandle res = mh1;
+ for (MethodHandle mh2 : mhs)
+ res = filterReturnValue(res, mh2);
+ return res;
+ }
+ private static void assertEqualFunction(MethodHandle x, MethodHandle y) throws Throwable {
+ assertEquals(x.type(), y.type()); //??
+ MethodType t = x.type();
+ if (t.parameterCount() == 0) {
+ assertEqualFunctionAt(null, x, y);
+ return;
+ }
+ Class<?> ptype = t.parameterType(0);
+ if (ptype == long.class || ptype == Long.class) {
+ for (long i = -10; i <= 10; i++) {
+ assertEqualFunctionAt(i, x, y);
+ }
+ } else {
+ for (int i = -10; i <= 10; i++) {
+ assertEqualFunctionAt(i, x, y);
+ }
+ }
+ }
+ private static void assertEqualFunctionAt(Object v, MethodHandle x, MethodHandle y) throws Throwable {
+ Object[] args = new Object[x.type().parameterCount()];
+ Arrays.fill(args, v);
+ Object xval = invokeWithCatch(x, args);
+ Object yval = invokeWithCatch(y, args);
+ String msg = "ok";
+ if (!Objects.equals(xval, yval)) {
+ msg = ("applying "+x+" & "+y+" to "+v);
+ }
+ assertEquals(msg, xval, yval);
+ }
+ private static Object invokeWithCatch(MethodHandle mh, Object... args) throws Throwable {
+ try {
+ return mh.invokeWithArguments(args);
+ } catch (Throwable ex) {
+ System.out.println("threw: "+mh+Arrays.asList(args));
+ ex.printStackTrace();
+ return ex;
+ }
+ }
+
+ private static final Lookup LOOKUP = lookup();
+ private static MethodHandle findStatic(String name,
+ Class<?> rtype,
+ Class<?>... ptypes) {
+ try {
+ return LOOKUP.findStatic(LOOKUP.lookupClass(), name, methodType(rtype, ptypes));
+ } catch (ReflectiveOperationException ex) {
+ throw new RuntimeException(ex);
+ }
+ }
+ private static MethodHandle findStatic(String name,
+ Class<?> rtype,
+ List<?> ptypes) {
+ return findStatic(name, rtype, ptypes.toArray(new Class<?>[ptypes.size()]));
+ }
+ static int getProperty(String name, int dflt) {
+ String qual = LOOKUP.lookupClass().getName();
+ String prop = System.getProperty(qual+"."+name);
+ if (prop == null) prop = System.getProperty(name);
+ if (prop == null) return dflt;
+ return Integer.parseInt(prop);
+ }
+
+ private static int opI(int... xs) {
+ stress();
+ int base = 100;
+ int z = 0;
+ for (int x : xs) {
+ z = (z * base) + (x % base);
+ }
+ verbose("opI", xs.length, xs, z);
+ return z;
+ }
+ private static int opI2(int x, int y) { return opI(x, y); } // x*100 + y%100
+ private static int opI3(int x, int y, int z) { return opI(x, y, z); }
+ private static int opI4(int w, int x, int y, int z) { return opI(w, x, y, z); }
+ private static int opI(int x) { return opI2(x, 37); }
+ private static Object opI_L(int x) { return (Object) opI(x); }
+ private static long opJ3(long x, long y, long z) { return (long) opI3((int)x, (int)y, (int)z); }
+ private static long opJ2(long x, long y) { return (long) opI2((int)x, (int)y); }
+ private static long opJ(long x) { return (long) opI((int)x); }
+ private static Object opL2(Object x, Object y) { return (Object) opI2((int)x, (int)y); }
+ private static Object opL(Object x) { return (Object) opI((int)x); }
+ private static int opL2_I(Object x, Object y) { return (int) opI2((int)x, (int)y); }
+ private static int opL_I(Object x) { return (int) opI((int)x); }
+ private static long opL_J(Object x) { return (long) opI((int)x); }
+ private static final MethodHandle opI, opI2, opI3, opI4, opI_L, opJ, opJ2, opJ3, opL2, opL, opL2_I, opL_I, opL_J;
+ static {
+ opI4 = findStatic("opI4", int.class, int.class, int.class, int.class, int.class);
+ opI3 = findStatic("opI3", int.class, int.class, int.class, int.class);
+ opI2 = findStatic("opI2", int.class, int.class, int.class);
+ opI = findStatic("opI", int.class, int.class);
+ opI_L = findStatic("opI_L", Object.class, int.class);
+ opJ = findStatic("opJ", long.class, long.class);
+ opJ2 = findStatic("opJ2", long.class, long.class, long.class);
+ opJ3 = findStatic("opJ3", long.class, long.class, long.class, long.class);
+ opL2 = findStatic("opL2", Object.class, Object.class, Object.class);
+ opL = findStatic("opL", Object.class, Object.class);
+ opL2_I = findStatic("opL2_I", int.class, Object.class, Object.class);
+ opL_I = findStatic("opL_I", int.class, Object.class);
+ opL_J = findStatic("opL_J", long.class, Object.class);
+ }
+ private static final MethodHandle[] INT_COLLECTORS = {
+ constant(int.class, 42), opI, opI2, opI3, opI4
+ };
+ private static final MethodHandle[] LONG_COLLECTORS = {
+ constant(long.class, 42), opJ, opJ2, opJ3
+ };
+
+ private static int addI(int x, int y) { stress(); return x+y; }
+ private static Object addL(Object x, Object y) { return addI((int)x, (int)y); }
+ private static final MethodHandle addI, addL;
+ static {
+ addI = findStatic("addI", int.class, int.class, int.class);
+ addL = findStatic("addL", Object.class, Object.class, Object.class);
+ }
+
+ private static Object list8ints(int a, int b, int c, int d, int e, int f, int g, int h) {
+ return Arrays.asList(a, b, c, d, e, f, g, h);
+ }
+ private static Object list8longs(long a, long b, long c, long d, long e, long f, long g, long h) {
+ return Arrays.asList(a, b, c, d, e, f, g, h);
+ }
+ private static final MethodHandle list8ints = findStatic("list8ints", Object.class,
+ Collections.nCopies(8, int.class));
+ private static final MethodHandle list8longs = findStatic("list8longs", Object.class,
+ Collections.nCopies(8, long.class));
+ private static final MethodHandle[] INT_LISTERS, LONG_LISTERS;
+ static {
+ int listerCount = list8ints.type().parameterCount() + 1;
+ INT_LISTERS = new MethodHandle[listerCount];
+ LONG_LISTERS = new MethodHandle[listerCount];
+ MethodHandle lister = list8ints;
+ MethodHandle llister = list8longs;
+ for (int i = listerCount - 1; ; i--) {
+ INT_LISTERS[i] = lister;
+ LONG_LISTERS[i] = llister;
+ if (i == 0) break;
+ lister = insertArguments(lister, i-1, (int)0);
+ llister = insertArguments(llister, i-1, (long)0);
+ }
+ }
+
+ private static Object convI_L(int x) { stress(); return (Object) x; }
+ private static int convL_I(Object x) { stress(); return (int) x; }
+ private static Object convJ_L(long x) { stress(); return (Object) x; }
+ private static long convL_J(Object x) { stress(); return (long) x; }
+ private static int convJ_I(long x) { stress(); return (int) x; }
+ private static long convI_J(int x) { stress(); return (long) x; }
+ private static final MethodHandle convI_L, convL_I, convJ_L, convL_J, convJ_I, convI_J;
+ static {
+ convI_L = findStatic("convI_L", Object.class, int.class);
+ convL_I = findStatic("convL_I", int.class, Object.class);
+ convJ_L = findStatic("convJ_L", Object.class, long.class);
+ convL_J = findStatic("convL_J", long.class, Object.class);
+ convJ_I = findStatic("convJ_I", int.class, long.class);
+ convI_J = findStatic("convI_J", long.class, int.class);
+ }
+
+ // stress modes:
+ private static final int REPEAT = getProperty("REPEAT", 0);
+ private static final int STRESS = getProperty("STRESS", 0);
+ private static /*v*/ int STRESS_COUNT;
+ private static final Object[] SINK = new Object[4];
+ private static void stress() {
+ if (STRESS <= 0) return;
+ int count = STRESS + (STRESS_COUNT++ & 0x1); // non-constant value
+ for (int i = 0; i < count; i++) {
+ SINK[i % SINK.length] = new Object[STRESS + i % (SINK.length + 1)];
+ }
+ }
+
+ // verbosity:
+ private static final int VERBOSITY = getProperty("VERBOSITY", 0) + (REPEAT == 0 ? 0 : -1);
+ private static void verbose(Object a, Object b, Object c, Object d) {
+ if (VERBOSITY <= 0) return;
+ verbose(1, a, b, c, d);
+ }
+ private static void verbose(Object a, Object b, Object c) {
+ if (VERBOSITY <= 0) return;
+ verbose(1, a, b, c);
+ }
+ private static void verbose(int level, Object a, Object... bcd) {
+ if (level > VERBOSITY) return;
+ String m = a.toString();
+ if (bcd != null && bcd.length > 0) {
+ List<Object> l = new ArrayList<>(bcd.length);
+ for (Object x : bcd) {
+ if (x instanceof Object[]) x = Arrays.asList((Object[])x);
+ if (x instanceof int[]) x = Arrays.toString((int[])x);
+ if (x instanceof long[]) x = Arrays.toString((long[])x);
+ l.add(x);
+ }
+ m = m+Arrays.asList(bcd);
+ }
+ System.out.println(m);
+ }
+ String testOnly;
+ String testOnlyTests;
+ private boolean startTest(String name) {
+ if (testOnly != null && !testOnly.contains(name))
+ return false;
+ verbose(0, "["+name+"]");
+ testOnlyTests = (testOnlyTests == null) ? name : testOnlyTests+" "+name;
+ return true;
+ }
+
+}