| /* |
| * Copyright (c) 2013, 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. |
| * |
| * 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 verify Lookup.revealDirect on a variety of input handles |
| * @compile -XDignore.symbol.file RevealDirectTest.java |
| * @run junit/othervm -ea -esa test.java.lang.invoke.RevealDirectTest |
| * |
| * @test |
| * @summary verify Lookup.revealDirect on a variety of input handles, with security manager |
| * @run main/othervm/policy=jtreg.security.policy/secure=java.lang.SecurityManager -ea -esa test.java.lang.invoke.RevealDirectTest |
| */ |
| |
| /* To run manually: |
| * $ $JAVA8X_HOME/bin/javac -cp $JUNIT4_JAR -d ../../../.. -XDignore.symbol.file RevealDirectTest.java |
| * $ $JAVA8X_HOME/bin/java -cp $JUNIT4_JAR:../../../.. -ea -esa org.junit.runner.JUnitCore test.java.lang.invoke.RevealDirectTest |
| * $ $JAVA8X_HOME/bin/java -cp $JUNIT4_JAR:../../../.. -ea -esa -Djava.security.manager test.java.lang.invoke.RevealDirectTest |
| */ |
| |
| package test.java.lang.invoke; |
| |
| import java.lang.reflect.*; |
| import java.lang.invoke.*; |
| import static java.lang.invoke.MethodHandles.*; |
| import static java.lang.invoke.MethodType.*; |
| import static java.lang.invoke.MethodHandleInfo.*; |
| import java.util.*; |
| import static org.junit.Assert.*; |
| import org.junit.*; |
| |
| public class RevealDirectTest { |
| public static void main(String... av) throws Throwable { |
| // Run the @Test methods explicitly, in case we don't want to use the JUnitCore driver. |
| // This appears to be necessary when running with a security manager. |
| Throwable fail = null; |
| for (Method test : RevealDirectTest.class.getDeclaredMethods()) { |
| if (!test.isAnnotationPresent(Test.class)) continue; |
| try { |
| test.invoke(new RevealDirectTest()); |
| } catch (Throwable ex) { |
| if (ex instanceof InvocationTargetException) |
| ex = ex.getCause(); |
| if (fail == null) fail = ex; |
| System.out.println("Testcase: "+test.getName() |
| +"("+test.getDeclaringClass().getName() |
| +"):\tCaused an ERROR"); |
| System.out.println(ex); |
| ex.printStackTrace(System.out); |
| } |
| } |
| if (fail != null) throw fail; |
| } |
| |
| public interface SimpleSuperInterface { |
| public abstract int getInt(); |
| public static void printAll(String... args) { |
| System.out.println(Arrays.toString(args)); |
| } |
| public int NICE_CONSTANT = 42; |
| } |
| public interface SimpleInterface extends SimpleSuperInterface { |
| default float getFloat() { return getInt(); } |
| public static void printAll(String[] args) { |
| System.out.println(Arrays.toString(args)); |
| } |
| } |
| public static class Simple implements SimpleInterface, Cloneable { |
| public int intField; |
| public final int finalField; |
| private static String stringField; |
| public int getInt() { return NICE_CONSTANT; } |
| private static Number getNum() { return 804; } |
| public Simple clone() { |
| try { |
| return (Simple) super.clone(); |
| } catch (CloneNotSupportedException ex) { |
| throw new RuntimeException(ex); |
| } |
| } |
| Simple() { finalField = -NICE_CONSTANT; } |
| private static Lookup localLookup() { return lookup(); } |
| private static List<Member> members() { return getMembers(lookup().lookupClass()); }; |
| } |
| static class Nestmate { |
| private static Lookup localLookup() { return lookup(); } |
| } |
| |
| static boolean VERBOSE = false; |
| |
| @Test public void testSimple() throws Throwable { |
| if (VERBOSE) System.out.println("@Test testSimple"); |
| testOnMembers("testSimple", Simple.members(), Simple.localLookup()); |
| } |
| @Test public void testPublicLookup() throws Throwable { |
| if (VERBOSE) System.out.println("@Test testPublicLookup"); |
| List<Member> mems = publicOnly(Simple.members()); |
| Lookup pubLookup = publicLookup(), privLookup = Simple.localLookup(); |
| testOnMembers("testPublicLookup/1", mems, pubLookup); |
| // reveal using publicLookup: |
| testOnMembers("testPublicLookup/2", mems, privLookup, pubLookup); |
| // lookup using publicLookup, but reveal using private: |
| testOnMembers("testPublicLookup/3", mems, pubLookup, privLookup); |
| } |
| @Test public void testPublicLookupNegative() throws Throwable { |
| if (VERBOSE) System.out.println("@Test testPublicLookupNegative"); |
| List<Member> mems = nonPublicOnly(Simple.members()); |
| Lookup pubLookup = publicLookup(), privLookup = Simple.localLookup(); |
| testOnMembersNoLookup("testPublicLookupNegative/1", mems, pubLookup); |
| testOnMembersNoReveal("testPublicLookupNegative/2", mems, privLookup, pubLookup); |
| testOnMembersNoReflect("testPublicLookupNegative/3", mems, privLookup, pubLookup); |
| } |
| @Test public void testJavaLangClass() throws Throwable { |
| if (VERBOSE) System.out.println("@Test testJavaLangClass"); |
| List<Member> mems = callerSensitive(false, publicOnly(getMembers(Class.class))); |
| mems = limit(20, mems); |
| testOnMembers("testJavaLangClass", mems, Simple.localLookup()); |
| } |
| @Test public void testCallerSensitive() throws Throwable { |
| if (VERBOSE) System.out.println("@Test testCallerSensitive"); |
| List<Member> mems = union(getMembers(MethodHandles.class, "lookup"), |
| getMembers(Method.class, "invoke"), |
| getMembers(Field.class, "get", "set", "getLong"), |
| getMembers(Class.class)); |
| mems = callerSensitive(true, publicOnly(mems)); |
| mems = limit(10, mems); |
| testOnMembers("testCallerSensitive", mems, Simple.localLookup()); |
| } |
| @Test public void testCallerSensitiveNegative() throws Throwable { |
| if (VERBOSE) System.out.println("@Test testCallerSensitiveNegative"); |
| List<Member> mems = union(getMembers(MethodHandles.class, "lookup"), |
| getMembers(Class.class, "forName"), |
| getMembers(Method.class, "invoke")); |
| mems = callerSensitive(true, publicOnly(mems)); |
| // CS methods cannot be looked up with publicLookup |
| testOnMembersNoLookup("testCallerSensitiveNegative/1", mems, publicLookup()); |
| // CS methods have to be revealed with a matching lookupClass |
| testOnMembersNoReveal("testCallerSensitiveNegative/2", mems, Simple.localLookup(), publicLookup()); |
| testOnMembersNoReveal("testCallerSensitiveNegative/3", mems, Simple.localLookup(), Nestmate.localLookup()); |
| } |
| @Test public void testMethodHandleNatives() throws Throwable { |
| if (VERBOSE) System.out.println("@Test testMethodHandleNatives"); |
| List<Member> mems = getMembers(MethodHandle.class, "invoke", "invokeExact"); |
| testOnMembers("testMethodHandleNatives", mems, Simple.localLookup()); |
| } |
| @Test public void testMethodHandleInvokes() throws Throwable { |
| if (VERBOSE) System.out.println("@Test testMethodHandleInvokes"); |
| List<MethodType> types = new ArrayList<>(); |
| Class<?>[] someParamTypes = { void.class, int.class, Object.class, Object[].class }; |
| for (Class<?> rt : someParamTypes) { |
| for (Class<?> p0 : someParamTypes) { |
| if (p0 == void.class) { types.add(methodType(rt)); continue; } |
| for (Class<?> p1 : someParamTypes) { |
| if (p1 == void.class) { types.add(methodType(rt, p0)); continue; } |
| for (Class<?> p2 : someParamTypes) { |
| if (p2 == void.class) { types.add(methodType(rt, p0, p1)); continue; } |
| types.add(methodType(rt, p0, p1, p2)); |
| } |
| } |
| } |
| } |
| List<Member> mems = union(getPolyMembers(MethodHandle.class, "invoke", types), |
| getPolyMembers(MethodHandle.class, "invokeExact", types)); |
| testOnMembers("testMethodHandleInvokes/1", mems, Simple.localLookup()); |
| testOnMembers("testMethodHandleInvokes/2", mems, publicLookup()); |
| } |
| |
| static List<Member> getPolyMembers(Class<?> cls, String name, List<MethodType> types) { |
| assert(cls == MethodHandle.class); |
| ArrayList<Member> mems = new ArrayList<>(); |
| for (MethodType type : types) { |
| mems.add(new SignaturePolymorphicMethod(name, type)); |
| } |
| return mems; |
| } |
| static List<Member> getMembers(Class<?> cls) { |
| return getMembers(cls, (String[]) null); |
| } |
| static List<Member> getMembers(Class<?> cls, String... onlyNames) { |
| List<String> names = (onlyNames == null || onlyNames.length == 0 ? null : Arrays.asList(onlyNames)); |
| ArrayList<Member> res = new ArrayList<>(); |
| for (Class<?> sup : getSupers(cls)) { |
| res.addAll(getDeclaredMembers(sup, "getDeclaredFields")); |
| res.addAll(getDeclaredMembers(sup, "getDeclaredMethods")); |
| res.addAll(getDeclaredMembers(sup, "getDeclaredConstructors")); |
| } |
| res = new ArrayList<>(new LinkedHashSet<>(res)); |
| for (int i = 0; i < res.size(); i++) { |
| Member mem = res.get(i); |
| if (!canBeReached(mem, cls) || |
| res.indexOf(mem) != i || |
| mem.isSynthetic() || |
| (names != null && !names.contains(mem.getName())) |
| ) { |
| res.remove(i--); |
| } |
| } |
| return res; |
| } |
| static List<Class<?>> getSupers(Class<?> cls) { |
| ArrayList<Class<?>> res = new ArrayList<>(); |
| ArrayList<Class<?>> intfs = new ArrayList<>(); |
| for (Class<?> sup = cls; sup != null; sup = sup.getSuperclass()) { |
| res.add(sup); |
| for (Class<?> intf : cls.getInterfaces()) { |
| if (!intfs.contains(intf)) |
| intfs.add(intf); |
| } |
| } |
| for (int i = 0; i < intfs.size(); i++) { |
| for (Class<?> intf : intfs.get(i).getInterfaces()) { |
| if (!intfs.contains(intf)) |
| intfs.add(intf); |
| } |
| } |
| res.addAll(intfs); |
| //System.out.println("getSupers => "+res); |
| return res; |
| } |
| static boolean hasSM() { |
| return (System.getSecurityManager() != null); |
| } |
| static List<Member> getDeclaredMembers(Class<?> cls, String accessor) { |
| Member[] mems = {}; |
| Method getter = getMethod(Class.class, accessor); |
| if (hasSM()) { |
| try { |
| mems = (Member[]) invokeMethod(getter, cls); |
| } catch (SecurityException ex) { |
| //if (VERBOSE) ex.printStackTrace(); |
| accessor = accessor.replace("Declared", ""); |
| getter = getMethod(Class.class, accessor); |
| if (VERBOSE) System.out.println("replaced accessor: "+getter); |
| } |
| } |
| if (mems.length == 0) { |
| try { |
| mems = (Member[]) invokeMethod(getter, cls); |
| } catch (SecurityException ex) { |
| ex.printStackTrace(); |
| } |
| } |
| if (VERBOSE) System.out.println(accessor+" "+cls.getName()+" => "+mems.length+" members"); |
| return Arrays.asList(mems); |
| } |
| static Method getMethod(Class<?> cls, String name) { |
| try { |
| return cls.getMethod(name); |
| } catch (ReflectiveOperationException ex) { |
| throw new AssertionError(ex); |
| } |
| } |
| static Object invokeMethod(Method m, Object recv, Object... args) { |
| try { |
| return m.invoke(recv, args); |
| } catch (InvocationTargetException ex) { |
| Throwable ex2 = ex.getCause(); |
| if (ex2 instanceof RuntimeException) throw (RuntimeException) ex2; |
| if (ex2 instanceof Error) throw (Error) ex2; |
| throw new AssertionError(ex); |
| } catch (ReflectiveOperationException ex) { |
| throw new AssertionError(ex); |
| } |
| } |
| |
| static List<Member> limit(int len, List<Member> mems) { |
| if (mems.size() <= len) return mems; |
| return mems.subList(0, len); |
| } |
| @SafeVarargs |
| static List<Member> union(List<Member> mems, List<Member>... mem2s) { |
| for (List<Member> mem2 : mem2s) { |
| for (Member m : mem2) { |
| if (!mems.contains(m)) |
| mems.add(m); |
| } |
| } |
| return mems; |
| } |
| static List<Member> callerSensitive(boolean cond, List<Member> members) { |
| for (Iterator<Member> i = members.iterator(); i.hasNext(); ) { |
| Member mem = i.next(); |
| if (isCallerSensitive(mem) != cond) |
| i.remove(); |
| } |
| if (members.isEmpty()) throw new AssertionError("trivial result"); |
| return members; |
| } |
| static boolean isCallerSensitive(Member mem) { |
| if (!(mem instanceof AnnotatedElement)) return false; |
| AnnotatedElement ae = (AnnotatedElement) mem; |
| if (CS_CLASS != null) |
| return ae.isAnnotationPresent(sun.reflect.CallerSensitive.class); |
| for (java.lang.annotation.Annotation a : ae.getDeclaredAnnotations()) { |
| if (a.toString().contains(".CallerSensitive")) |
| return true; |
| } |
| return false; |
| } |
| static final Class<?> CS_CLASS; |
| static { |
| Class<?> c = null; |
| try { |
| c = sun.reflect.CallerSensitive.class; |
| } catch (SecurityException | LinkageError ex) { |
| } |
| CS_CLASS = c; |
| } |
| static List<Member> publicOnly(List<Member> members) { |
| return removeMods(members, Modifier.PUBLIC, 0); |
| } |
| static List<Member> nonPublicOnly(List<Member> members) { |
| return removeMods(members, Modifier.PUBLIC, -1); |
| } |
| static List<Member> removeMods(List<Member> members, int mask, int bits) { |
| int publicMods = (mask & Modifier.PUBLIC); |
| members = new ArrayList<>(members); |
| for (Iterator<Member> i = members.iterator(); i.hasNext(); ) { |
| Member mem = i.next(); |
| int mods = mem.getModifiers(); |
| if ((publicMods & mods) != 0 && |
| (publicMods & mem.getDeclaringClass().getModifiers()) == 0) |
| mods -= publicMods; |
| if ((mods & mask) == (bits & mask)) |
| i.remove(); |
| } |
| return members; |
| } |
| |
| void testOnMembers(String tname, List<Member> mems, Lookup lookup, Lookup... lookups) throws Throwable { |
| if (VERBOSE) System.out.println("testOnMembers "+mems); |
| Lookup revLookup = (lookups.length > 0) ? lookups[0] : null; |
| if (revLookup == null) revLookup = lookup; |
| Lookup refLookup = (lookups.length > 1) ? lookups[1] : null; |
| if (refLookup == null) refLookup = lookup; |
| assert(lookups.length <= 2); |
| testOnMembersImpl(tname, mems, lookup, revLookup, refLookup, NO_FAIL); |
| } |
| void testOnMembersNoLookup(String tname, List<Member> mems, Lookup lookup) throws Throwable { |
| if (VERBOSE) System.out.println("testOnMembersNoLookup "+mems); |
| testOnMembersImpl(tname, mems, lookup, null, null, FAIL_LOOKUP); |
| } |
| void testOnMembersNoReveal(String tname, List<Member> mems, |
| Lookup lookup, Lookup negLookup) throws Throwable { |
| if (VERBOSE) System.out.println("testOnMembersNoReveal "+mems); |
| testOnMembersImpl(tname, mems, lookup, negLookup, null, FAIL_REVEAL); |
| } |
| void testOnMembersNoReflect(String tname, List<Member> mems, |
| Lookup lookup, Lookup negLookup) throws Throwable { |
| if (VERBOSE) System.out.println("testOnMembersNoReflect "+mems); |
| testOnMembersImpl(tname, mems, lookup, lookup, negLookup, FAIL_REFLECT); |
| } |
| void testOnMembersImpl(String tname, List<Member> mems, |
| Lookup lookup, |
| Lookup revLookup, |
| Lookup refLookup, |
| int failureMode) throws Throwable { |
| Throwable fail = null; |
| int failCount = 0; |
| failureModeCounts = new int[FAIL_MODE_COUNT]; |
| long tm0 = System.currentTimeMillis(); |
| for (Member mem : mems) { |
| try { |
| testWithMember(mem, lookup, revLookup, refLookup, failureMode); |
| } catch (Throwable ex) { |
| if (fail == null) fail = ex; |
| if (++failCount > 10) { System.out.println("*** FAIL: too many failures"); break; } |
| System.out.println("*** FAIL: "+mem+" => "+ex); |
| if (VERBOSE) ex.printStackTrace(System.out); |
| } |
| } |
| long tm1 = System.currentTimeMillis(); |
| System.out.printf("@Test %s executed %s tests in %d ms", |
| tname, testKinds(failureModeCounts), (tm1-tm0)).println(); |
| if (fail != null) throw fail; |
| } |
| static String testKinds(int[] modes) { |
| int pos = modes[0], neg = -pos; |
| for (int n : modes) neg += n; |
| if (neg == 0) return pos + " positive"; |
| String negs = ""; |
| for (int n : modes) negs += "/"+n; |
| negs = negs.replaceFirst("/"+pos+"/", ""); |
| negs += " negative"; |
| if (pos == 0) return negs; |
| return pos + " positive, " + negs; |
| } |
| static class SignaturePolymorphicMethod implements Member { // non-reflected instance of MH.invoke* |
| final String name; |
| final MethodType type; |
| SignaturePolymorphicMethod(String name, MethodType type) { |
| this.name = name; |
| this.type = type; |
| } |
| public String toString() { |
| String typeStr = type.toString(); |
| if (isVarArgs()) typeStr = typeStr.replaceFirst("\\[\\])$", "...)"); |
| return (Modifier.toString(getModifiers()) |
| +typeStr.substring(0, typeStr.indexOf('('))+" " |
| +getDeclaringClass().getTypeName()+"." |
| +getName()+typeStr.substring(typeStr.indexOf('('))); |
| } |
| public boolean equals(Object x) { |
| return (x instanceof SignaturePolymorphicMethod && equals((SignaturePolymorphicMethod)x)); |
| } |
| public boolean equals(SignaturePolymorphicMethod that) { |
| return this.name.equals(that.name) && this.type.equals(that.type); |
| } |
| public int hashCode() { |
| return name.hashCode() * 31 + type.hashCode(); |
| } |
| public Class<?> getDeclaringClass() { return MethodHandle.class; } |
| public String getName() { return name; } |
| public MethodType getMethodType() { return type; } |
| public int getModifiers() { return Modifier.PUBLIC | Modifier.FINAL | Modifier.NATIVE | SYNTHETIC; } |
| public boolean isVarArgs() { return Modifier.isTransient(getModifiers()); } |
| public boolean isSynthetic() { return true; } |
| public Class<?> getReturnType() { return type.returnType(); } |
| public Class<?>[] getParameterTypes() { return type.parameterArray(); } |
| static final int SYNTHETIC = 0x00001000; |
| } |
| static class UnreflectResult { // a tuple |
| final MethodHandle mh; |
| final Throwable ex; |
| final byte kind; |
| final Member mem; |
| final int var; |
| UnreflectResult(MethodHandle mh, byte kind, Member mem, int var) { |
| this.mh = mh; |
| this.ex = null; |
| this.kind = kind; |
| this.mem = mem; |
| this.var = var; |
| } |
| UnreflectResult(Throwable ex, byte kind, Member mem, int var) { |
| this.mh = null; |
| this.ex = ex; |
| this.kind = kind; |
| this.mem = mem; |
| this.var = var; |
| } |
| public String toString() { |
| return toInfoString()+"/v"+var; |
| } |
| public String toInfoString() { |
| return String.format("%s %s.%s:%s", MethodHandleInfo.referenceKindToString(kind), |
| mem.getDeclaringClass().getName(), name(mem), type(mem, kind)); |
| } |
| static String name(Member mem) { |
| if (mem instanceof Constructor) return "<init>"; |
| return mem.getName(); |
| } |
| static MethodType type(Member mem, byte kind) { |
| if (mem instanceof Field) { |
| Class<?> type = ((Field)mem).getType(); |
| if (kind == REF_putStatic || kind == REF_putField) |
| return methodType(void.class, type); |
| return methodType(type); |
| } else if (mem instanceof SignaturePolymorphicMethod) { |
| return ((SignaturePolymorphicMethod)mem).getMethodType(); |
| } |
| Class<?>[] params = ((Executable)mem).getParameterTypes(); |
| if (mem instanceof Constructor) |
| return methodType(void.class, params); |
| Class<?> type = ((Method)mem).getReturnType(); |
| return methodType(type, params); |
| } |
| } |
| static UnreflectResult unreflectMember(Lookup lookup, Member mem, int variation) { |
| byte[] refKind = {0}; |
| try { |
| return unreflectMemberOrThrow(lookup, mem, variation, refKind); |
| } catch (ReflectiveOperationException|SecurityException ex) { |
| return new UnreflectResult(ex, refKind[0], mem, variation); |
| } |
| } |
| static UnreflectResult unreflectMemberOrThrow(Lookup lookup, Member mem, int variation, |
| byte[] refKind) throws ReflectiveOperationException { |
| Class<?> cls = lookup.lookupClass(); |
| Class<?> defc = mem.getDeclaringClass(); |
| String name = mem.getName(); |
| int mods = mem.getModifiers(); |
| boolean isStatic = Modifier.isStatic(mods); |
| MethodHandle mh = null; |
| byte kind = 0; |
| if (mem instanceof Method) { |
| Method m = (Method) mem; |
| MethodType type = methodType(m.getReturnType(), m.getParameterTypes()); |
| boolean canBeSpecial = (!isStatic && |
| (lookup.lookupModes() & Modifier.PRIVATE) != 0 && |
| defc.isAssignableFrom(cls) && |
| (!defc.isInterface() || Arrays.asList(cls.getInterfaces()).contains(defc))); |
| if (variation >= 2) |
| kind = REF_invokeSpecial; |
| else if (isStatic) |
| kind = REF_invokeStatic; |
| else if (defc.isInterface()) |
| kind = REF_invokeInterface; |
| else |
| kind = REF_invokeVirtual; |
| refKind[0] = kind; |
| switch (variation) { |
| case 0: |
| mh = lookup.unreflect(m); |
| break; |
| case 1: |
| if (defc == MethodHandle.class && |
| !isStatic && |
| m.isVarArgs() && |
| Modifier.isFinal(mods) && |
| Modifier.isNative(mods)) { |
| break; |
| } |
| if (isStatic) |
| mh = lookup.findStatic(defc, name, type); |
| else |
| mh = lookup.findVirtual(defc, name, type); |
| break; |
| case 2: |
| if (!canBeSpecial) |
| break; |
| mh = lookup.unreflectSpecial(m, lookup.lookupClass()); |
| break; |
| case 3: |
| if (!canBeSpecial) |
| break; |
| mh = lookup.findSpecial(defc, name, type, lookup.lookupClass()); |
| break; |
| } |
| } else if (mem instanceof SignaturePolymorphicMethod) { |
| SignaturePolymorphicMethod m = (SignaturePolymorphicMethod) mem; |
| MethodType type = methodType(m.getReturnType(), m.getParameterTypes()); |
| kind = REF_invokeVirtual; |
| refKind[0] = kind; |
| switch (variation) { |
| case 0: |
| mh = lookup.findVirtual(defc, name, type); |
| break; |
| } |
| } else if (mem instanceof Constructor) { |
| name = "<init>"; // not used |
| Constructor<?> m = (Constructor<?>) mem; |
| MethodType type = methodType(void.class, m.getParameterTypes()); |
| kind = REF_newInvokeSpecial; |
| refKind[0] = kind; |
| switch (variation) { |
| case 0: |
| mh = lookup.unreflectConstructor(m); |
| break; |
| case 1: |
| mh = lookup.findConstructor(defc, type); |
| break; |
| } |
| } else if (mem instanceof Field) { |
| Field m = (Field) mem; |
| Class<?> type = m.getType(); |
| boolean canHaveSetter = !Modifier.isFinal(mods); |
| if (variation >= 2) |
| kind = (byte)(isStatic ? REF_putStatic : REF_putField); |
| else |
| kind = (byte)(isStatic ? REF_getStatic : REF_getField); |
| refKind[0] = kind; |
| switch (variation) { |
| case 0: |
| mh = lookup.unreflectGetter(m); |
| break; |
| case 1: |
| if (isStatic) |
| mh = lookup.findStaticGetter(defc, name, type); |
| else |
| mh = lookup.findGetter(defc, name, type); |
| break; |
| case 3: |
| if (!canHaveSetter) |
| break; |
| mh = lookup.unreflectSetter(m); |
| break; |
| case 2: |
| if (!canHaveSetter) |
| break; |
| if (isStatic) |
| mh = lookup.findStaticSetter(defc, name, type); |
| else |
| mh = lookup.findSetter(defc, name, type); |
| break; |
| } |
| } else { |
| throw new IllegalArgumentException(String.valueOf(mem)); |
| } |
| if (mh == null) |
| // ran out of valid variations; return null to caller |
| return null; |
| return new UnreflectResult(mh, kind, mem, variation); |
| } |
| static boolean canBeReached(Member mem, Class<?> cls) { |
| Class<?> defc = mem.getDeclaringClass(); |
| String name = mem.getName(); |
| int mods = mem.getModifiers(); |
| if (mem instanceof Constructor) { |
| name = "<init>"; // according to 292 spec. |
| } |
| if (defc == cls) |
| return true; |
| if (name.startsWith("<")) |
| return false; // only my own constructors |
| if (Modifier.isPrivate(mods)) |
| return false; // only my own constructors |
| if (defc.getPackage() == cls.getPackage()) |
| return true; // package access or greater OK |
| if (Modifier.isPublic(mods)) |
| return true; // publics always OK |
| if (Modifier.isProtected(mods) && defc.isAssignableFrom(cls)) |
| return true; // protected OK |
| return false; |
| } |
| static boolean consistent(UnreflectResult res, MethodHandleInfo info) { |
| assert(res.mh != null); |
| assertEquals(res.kind, info.getReferenceKind()); |
| assertEquals(res.mem.getModifiers(), info.getModifiers()); |
| assertEquals(res.mem.getDeclaringClass(), info.getDeclaringClass()); |
| String expectName = res.mem.getName(); |
| if (res.kind == REF_newInvokeSpecial) |
| expectName = "<init>"; |
| assertEquals(expectName, info.getName()); |
| MethodType expectType = res.mh.type(); |
| if ((res.kind & 1) == (REF_getField & 1)) |
| expectType = expectType.dropParameterTypes(0, 1); |
| if (res.kind == REF_newInvokeSpecial) |
| expectType = expectType.changeReturnType(void.class); |
| assertEquals(expectType, info.getMethodType()); |
| assertEquals(res.mh.isVarargsCollector(), isVarArgs(info)); |
| assertEquals(res.toInfoString(), info.toString()); |
| assertEquals(res.toInfoString(), MethodHandleInfo.toString(info.getReferenceKind(), info.getDeclaringClass(), info.getName(), info.getMethodType())); |
| return true; |
| } |
| static boolean isVarArgs(MethodHandleInfo info) { |
| return info.isVarArgs(); |
| } |
| static boolean consistent(Member mem, Member mem2) { |
| assertEquals(mem, mem2); |
| return true; |
| } |
| static boolean consistent(MethodHandleInfo info, MethodHandleInfo info2) { |
| assertEquals(info.getReferenceKind(), info2.getReferenceKind()); |
| assertEquals(info.getModifiers(), info2.getModifiers()); |
| assertEquals(info.getDeclaringClass(), info2.getDeclaringClass()); |
| assertEquals(info.getName(), info2.getName()); |
| assertEquals(info.getMethodType(), info2.getMethodType()); |
| assertEquals(isVarArgs(info), isVarArgs(info)); |
| return true; |
| } |
| static boolean consistent(MethodHandle mh, MethodHandle mh2) { |
| assertEquals(mh.type(), mh2.type()); |
| assertEquals(mh.isVarargsCollector(), mh2.isVarargsCollector()); |
| return true; |
| } |
| int[] failureModeCounts; |
| static final int NO_FAIL=0, FAIL_LOOKUP=1, FAIL_REVEAL=2, FAIL_REFLECT=3, FAIL_MODE_COUNT=4; |
| void testWithMember(Member mem, |
| Lookup lookup, // initial lookup of member => MH |
| Lookup revLookup, // reveal MH => info |
| Lookup refLookup, // reflect info => member |
| int failureMode) throws Throwable { |
| boolean expectEx1 = (failureMode == FAIL_LOOKUP); // testOnMembersNoLookup |
| boolean expectEx2 = (failureMode == FAIL_REVEAL); // testOnMembersNoReveal |
| boolean expectEx3 = (failureMode == FAIL_REFLECT); // testOnMembersNoReflect |
| for (int variation = 0; ; variation++) { |
| UnreflectResult res = unreflectMember(lookup, mem, variation); |
| failureModeCounts[failureMode] += 1; |
| if (variation == 0) assert(res != null); |
| if (res == null) break; |
| if (VERBOSE && variation == 0) |
| System.out.println("from "+mem.getDeclaringClass().getSimpleName()); |
| MethodHandle mh = res.mh; |
| Throwable ex1 = res.ex; |
| if (VERBOSE) System.out.println(" "+variation+": "+res+" << "+(mh != null ? mh : ex1)); |
| if (expectEx1 && ex1 != null) |
| continue; // this is OK; we expected that lookup to fail |
| if (expectEx1) |
| throw new AssertionError("unexpected lookup for negative test"); |
| if (ex1 != null && !expectEx1) { |
| if (failureMode != NO_FAIL) |
| throw new AssertionError("unexpected lookup failure for negative test", ex1); |
| throw ex1; |
| } |
| MethodHandleInfo info; |
| try { |
| info = revLookup.revealDirect(mh); |
| if (expectEx2) throw new AssertionError("unexpected revelation for negative test"); |
| } catch (IllegalArgumentException|SecurityException ex2) { |
| if (VERBOSE) System.out.println(" "+variation+": "+res+" => "+mh.getClass().getName()+" => (EX2)"+ex2); |
| if (expectEx2) |
| continue; // this is OK; we expected the reflect to fail |
| if (failureMode != NO_FAIL) |
| throw new AssertionError("unexpected revelation failure for negative test", ex2); |
| throw ex2; |
| } |
| assert(consistent(res, info)); |
| Member mem2; |
| try { |
| mem2 = info.reflectAs(Member.class, refLookup); |
| if (expectEx3) throw new AssertionError("unexpected reflection for negative test"); |
| assert(!(mem instanceof SignaturePolymorphicMethod)); |
| } catch (IllegalArgumentException ex3) { |
| if (VERBOSE) System.out.println(" "+variation+": "+info+" => (EX3)"+ex3); |
| if (expectEx3) |
| continue; // this is OK; we expected the reflect to fail |
| if (mem instanceof SignaturePolymorphicMethod) |
| continue; // this is OK; we cannot reflect MH.invokeExact(a,b,c) |
| if (failureMode != NO_FAIL) |
| throw new AssertionError("unexpected reflection failure for negative test", ex3); |
| throw ex3; |
| } |
| assert(consistent(mem, mem2)); |
| UnreflectResult res2 = unreflectMember(lookup, mem2, variation); |
| MethodHandle mh2 = res2.mh; |
| assert(consistent(mh, mh2)); |
| MethodHandleInfo info2 = lookup.revealDirect(mh2); |
| assert(consistent(info, info2)); |
| assert(consistent(res, info2)); |
| Member mem3; |
| if (hasSM()) |
| mem3 = info2.reflectAs(Member.class, lookup); |
| else |
| mem3 = MethodHandles.reflectAs(Member.class, mh2); |
| assert(consistent(mem2, mem3)); |
| if (hasSM()) { |
| try { |
| MethodHandles.reflectAs(Member.class, mh2); |
| throw new AssertionError("failed to throw on "+mem3); |
| } catch (SecurityException ex3) { |
| // OK... |
| } |
| } |
| } |
| } |
| } |
