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8173587: LambdaMetafactory needs to validate descriptors and method name

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Reviewed-by: psandoz
This commit is contained in:
Dan Smith 2017-02-08 12:27:45 -07:00
parent 9582e0be97
commit 125d4ea7d0
4 changed files with 505 additions and 180 deletions
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52
jdk/src/java.base/share/classes/java/lang/invoke/AbstractValidatingLambdaMetafactory.java
View File

@ -141,6 +141,18 @@ import static sun.invoke.util.Wrapper.isWrapperType;
this.markerInterfaces = markerInterfaces;
this.additionalBridges = additionalBridges;
if (samMethodName.isEmpty() ||
samMethodName.indexOf('.') >= 0 ||
samMethodName.indexOf(';') >= 0 ||
samMethodName.indexOf('[') >= 0 ||
samMethodName.indexOf('/') >= 0 ||
samMethodName.indexOf('<') >= 0 ||
samMethodName.indexOf('>') >= 0) {
throw new LambdaConversionException(String.format(
"Method name '%s' is not legal",
samMethodName));
}
if (!samBase.isInterface()) {
throw new LambdaConversionException(String.format(
"Functional interface %s is not an interface",
@ -275,25 +287,39 @@ import static sun.invoke.util.Wrapper.isWrapperType;
(implKind == MethodHandleInfo.REF_newInvokeSpecial)
? implDefiningClass
: implMethodType.returnType();
Class<?> samReturnType = samMethodType.returnType();
if (!isAdaptableToAsReturn(actualReturnType, expectedType)) {
throw new LambdaConversionException(
String.format("Type mismatch for lambda return: %s is not convertible to %s",
actualReturnType, expectedType));
}
if (!isAdaptableToAsReturnStrict(expectedType, samReturnType)) {
throw new LambdaConversionException(
String.format("Type mismatch for lambda expected return: %s is not convertible to %s",
expectedType, samReturnType));
}
// Check descriptors of generated methods
checkDescriptor(samMethodType);
for (MethodType bridgeMT : additionalBridges) {
if (!isAdaptableToAsReturnStrict(expectedType, bridgeMT.returnType())) {
throw new LambdaConversionException(
String.format("Type mismatch for lambda expected return: %s is not convertible to %s",
expectedType, bridgeMT.returnType()));
checkDescriptor(bridgeMT);
}
}
/** Validate that the given descriptor's types are compatible with {@code instantiatedMethodType} **/
private void checkDescriptor(MethodType descriptor) throws LambdaConversionException {
for (int i = 0; i < instantiatedMethodType.parameterCount(); i++) {
Class<?> instantiatedParamType = instantiatedMethodType.parameterType(i);
Class<?> descriptorParamType = descriptor.parameterType(i);
if (!descriptorParamType.isAssignableFrom(instantiatedParamType)) {
String msg = String.format("Type mismatch for instantiated parameter %d: %s is not a subtype of %s",
i, instantiatedParamType, descriptorParamType);
throw new LambdaConversionException(msg);
}
}
}
Class<?> instantiatedReturnType = instantiatedMethodType.returnType();
Class<?> descriptorReturnType = descriptor.returnType();
if (!isAdaptableToAsReturnStrict(instantiatedReturnType, descriptorReturnType)) {
String msg = String.format("Type mismatch for lambda expected return: %s is not convertible to %s",
instantiatedReturnType, descriptorReturnType);
throw new LambdaConversionException(msg);
}
}
/**
* Check type adaptability for parameter types.
@ -345,8 +371,8 @@ import static sun.invoke.util.Wrapper.isWrapperType;
|| !fromType.equals(void.class) && isAdaptableTo(fromType, toType, false);
}
private boolean isAdaptableToAsReturnStrict(Class<?> fromType, Class<?> toType) {
if (fromType.equals(void.class)) return toType.equals(void.class);
return isAdaptableTo(fromType, toType, true);
if (fromType.equals(void.class) || toType.equals(void.class)) return fromType.equals(toType);
else return isAdaptableTo(fromType, toType, true);
}

269
jdk/test/java/lang/invoke/lambda/MetafactoryDescriptorTest.java Normal file
View File

@ -0,0 +1,269 @@
/*
* Copyright (c) 2017, 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
* @bug 8035776 8173587
* @summary metafactory should fail if instantiatedMethodType does not match sam/bridge descriptors
*/
import java.lang.invoke.*;
import java.util.*;
public class MetafactoryDescriptorTest {
static final MethodHandles.Lookup lookup = MethodHandles.lookup();
static MethodType mt(Class<?> ret, Class<?>... params) {
return MethodType.methodType(ret, params);
}
public interface I {}
public static class C {
public static void m_void(String arg) {}
public static boolean m_boolean(String arg) { return true; }
public static char m_char(String arg) { return 'x'; }
public static byte m_byte(String arg) { return 12; }
public static short m_short(String arg) { return 12; }
public static int m_int(String arg) { return 12; }
public static long m_long(String arg) { return 12; }
public static float m_float(String arg) { return 12; }
public static double m_double(String arg) { return 12; }
public static String m_String(String arg) { return ""; }
public static Integer m_Integer(String arg) { return 23; }
public static Object m_Object(String arg) { return new Object(); }
public static String n_boolean(boolean arg) { return ""; }
public static String n_char(char arg) { return ""; }
public static String n_byte(byte arg) { return ""; }
public static String n_short(short arg) { return ""; }
public static String n_int(int arg) { return ""; }
public static String n_long(long arg) { return ""; }
public static String n_float(float arg) { return ""; }
public static String n_double(double arg) { return ""; }
public static String n_String(String arg) { return ""; }
public static String n_Integer(Integer arg) { return ""; }
public static String n_Object(Object arg) { return ""; }
public static MethodHandle getM(Class<?> c) {
try {
return lookup.findStatic(C.class, "m_" + c.getSimpleName(), mt(c, String.class));
}
catch (NoSuchMethodException | IllegalAccessException e) {
throw new RuntimeException(e);
}
}
public static MethodHandle getN(Class<?> c) {
if (c == void.class) return null;
try {
return lookup.findStatic(C.class, "n_" + c.getSimpleName(), mt(String.class, c));
}
catch (NoSuchMethodException | IllegalAccessException e) {
throw new RuntimeException(e);
}
}
}
public static void main(String... args) {
Class<?>[] t = { void.class, boolean.class, char.class,
byte.class, short.class, int.class, long.class, float.class, double.class,
String.class, Integer.class, Object.class };
for (int i = 0; i < t.length; i++) {
MethodHandle m = C.getM(t[i]);
MethodHandle n = C.getN(t[i]); // null for void.class
for (int j = 0; j < t.length; j++) {
boolean correctRet = t[j].isAssignableFrom(t[i]) || conversions.contains(t[i], t[j]);
test(correctRet, m, mt(t[i], String.class), mt(t[j], String.class));
testBridge(correctRet, m, mt(t[i], String.class), mt(t[i], String.class),
mt(t[j], Object.class));
testBridge(correctRet, m, mt(t[i], String.class), mt(t[i], String.class),
mt(t[i], CharSequence.class), mt(t[j], Object.class));
if (t[i] != void.class && t[j] != void.class) {
boolean correctParam = t[j].isAssignableFrom(t[i]);
test(correctParam, n, mt(String.class, t[i]), mt(String.class, t[j]));
testBridge(correctParam, n, mt(String.class, t[i]), mt(String.class, t[i]),
mt(Object.class, t[j]));
testBridge(correctParam, n, mt(String.class, t[i]), mt(String.class, t[i]),
mt(CharSequence.class, t[i]), mt(Object.class, t[j]));
}
}
}
}
static void test(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT) {
tryMetafactory(correct, mh, instMT, samMT);
tryAltMetafactory(correct, mh, instMT, samMT);
}
static void testBridge(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT, MethodType... bridgeMTs) {
tryAltMetafactory(correct, mh, instMT, samMT, bridgeMTs);
}
static void tryMetafactory(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT) {
try {
LambdaMetafactory.metafactory(lookup, "run", mt(I.class),
samMT, mh, instMT);
if (!correct) {
throw new AssertionError("Unexpected linkage without error:" +
" impl=" + mh +
", inst=" + instMT +
", sam=" + samMT);
}
}
catch (LambdaConversionException e) {
if (correct) {
throw new AssertionError("Unexpected linkage error:" +
" e=" + e +
", impl=" + mh +
", inst=" + instMT +
", sam=" + samMT);
}
}
}
static void tryAltMetafactory(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT,
MethodType... bridgeMTs) {
boolean bridge = bridgeMTs.length > 0;
Object[] args = new Object[bridge ? 5+bridgeMTs.length : 4];
args[0] = samMT;
args[1] = mh;
args[2] = instMT;
args[3] = bridge ? LambdaMetafactory.FLAG_BRIDGES : 0;
if (bridge) {
args[4] = bridgeMTs.length;
for (int i = 0; i < bridgeMTs.length; i++) args[5+i] = bridgeMTs[i];
}
try {
LambdaMetafactory.altMetafactory(lookup, "run", mt(I.class), args);
if (!correct) {
throw new AssertionError("Unexpected linkage without error:" +
" impl=" + mh +
", inst=" + instMT +
", sam=" + samMT +
", bridges=" + Arrays.toString(bridgeMTs));
}
}
catch (LambdaConversionException e) {
if (correct) {
throw new AssertionError("Unexpected linkage error:" +
" e=" + e +
", impl=" + mh +
", inst=" + instMT +
", sam=" + samMT +
", bridges=" + Arrays.toString(bridgeMTs));
}
}
}
private static class ConversionTable {
private final Map<Class<?>, Set<Class<?>>> pairs = new HashMap<>();
public void put(Class<?> from, Class<?> to) {
Set<Class<?>> set = pairs.computeIfAbsent(from, f -> new HashSet<>());
set.add(to);
}
public boolean contains(Class<?> from, Class<?> to) {
return pairs.containsKey(from) && pairs.get(from).contains(to);
}
}
private static ConversionTable conversions = new ConversionTable();
static {
conversions.put(char.class, int.class);
conversions.put(char.class, long.class);
conversions.put(char.class, float.class);
conversions.put(char.class, double.class);
conversions.put(char.class, Character.class);
conversions.put(char.class, Object.class);
conversions.put(Character.class, char.class);
conversions.put(Character.class, int.class);
conversions.put(Character.class, long.class);
conversions.put(Character.class, float.class);
conversions.put(Character.class, double.class);
conversions.put(byte.class, short.class);
conversions.put(byte.class, int.class);
conversions.put(byte.class, long.class);
conversions.put(byte.class, float.class);
conversions.put(byte.class, double.class);
conversions.put(byte.class, Byte.class);
conversions.put(byte.class, Object.class);
conversions.put(Byte.class, byte.class);
conversions.put(Byte.class, short.class);
conversions.put(Byte.class, int.class);
conversions.put(Byte.class, long.class);
conversions.put(Byte.class, float.class);
conversions.put(Byte.class, double.class);
conversions.put(short.class, int.class);
conversions.put(short.class, long.class);
conversions.put(short.class, float.class);
conversions.put(short.class, double.class);
conversions.put(short.class, Short.class);
conversions.put(short.class, Object.class);
conversions.put(Short.class, short.class);
conversions.put(Short.class, int.class);
conversions.put(Short.class, long.class);
conversions.put(Short.class, float.class);
conversions.put(Short.class, double.class);
conversions.put(int.class, long.class);
conversions.put(int.class, float.class);
conversions.put(int.class, double.class);
conversions.put(int.class, Integer.class);
conversions.put(int.class, Object.class);
conversions.put(Integer.class, int.class);
conversions.put(Integer.class, long.class);
conversions.put(Integer.class, float.class);
conversions.put(Integer.class, double.class);
conversions.put(long.class, float.class);
conversions.put(long.class, double.class);
conversions.put(long.class, Long.class);
conversions.put(long.class, Object.class);
conversions.put(Long.class, long.class);
conversions.put(Long.class, float.class);
conversions.put(Long.class, double.class);
conversions.put(float.class, double.class);
conversions.put(float.class, Float.class);
conversions.put(float.class, Object.class);
conversions.put(Float.class, float.class);
conversions.put(Float.class, double.class);
conversions.put(double.class, Double.class);
conversions.put(double.class, Object.class);
conversions.put(Double.class, double.class);
conversions.put(boolean.class, Boolean.class);
conversions.put(boolean.class, Object.class);
conversions.put(Boolean.class, boolean.class);
}
}

197
jdk/test/java/lang/invoke/lambda/MetafactoryMethodNameTest.java Normal file
View File

@ -0,0 +1,197 @@
/*
* Copyright (c) 2017, 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
* @bug 8173587
* @summary metafactory should fail if the method name is not legal
*/
import java.lang.invoke.*;
import java.util.*;
public class MetafactoryMethodNameTest {
public static void main(String... args) {
goodName("x");
goodName("xy");
goodName("]");
goodName("x]");
goodName("]y");
goodName("x]y");
goodName("&");
goodName("x&");
goodName("&y");
goodName("x&y");
badName(".");
badName("x.");
badName(".y");
badName("x.y");
badName(";");
badName("x;");
badName(";y");
badName("x;y");
badName("[");
badName("x[");
badName("[y");
badName("x[y");
badName("/");
badName("x/");
badName("/y");
badName("x/y");
badName("<");
badName("x<");
badName("<y");
badName("x<y");
badName(">");
badName("x>");
badName(">y");
badName("x>y");
badName("");
badName("<init>");
badName("<clinit>");
}
static MethodType mt(Class<?> ret, Class<?>... params) {
return MethodType.methodType(ret, params);
}
static MethodHandle smh(Class<?> c, String name, MethodType desc) {
try {
return MethodHandles.lookup().findStatic(c, name, desc);
} catch (ReflectiveOperationException e) {
throw new RuntimeException(e);
}
}
static Object[] arr(Object... args) {
return args;
}
public static class C {
public static void m() {}
}
public interface I {}
private static MethodHandles.Lookup lookup = MethodHandles.lookup();
private static MethodType toI = mt(I.class);
private static MethodType toVoid = mt(void.class);
private static MethodHandle mh = smh(C.class, "m", toVoid);
private static Class<?> lce = LambdaConversionException.class;
static void goodName(String name) {
succeedMFLinkage(lookup, name, toI, toVoid, mh, toVoid);
succeedAltMFLinkage(lookup, name, toI, arr(toVoid, mh, toVoid, LambdaMetafactory.FLAG_SERIALIZABLE));
}
static void badName(String name) {
failMFLinkage(lookup, name, toI, toVoid, mh, toVoid, lce);
failAltMFLinkage(lookup, name, toI, arr(toVoid, mh, toVoid, LambdaMetafactory.FLAG_SERIALIZABLE), lce);
}
static CallSite succeedMFLinkage(MethodHandles.Lookup lookup,
String name,
MethodType capType,
MethodType desc,
MethodHandle impl,
MethodType checked) {
try {
return LambdaMetafactory.metafactory(lookup, name, capType, desc, impl, checked);
} catch (Throwable t) {
String msg = String.format("Unexpected exception during linkage for metafactory(%s, %s, %s, %s, %s, %s)",
lookup, name, capType, desc, impl, checked);
throw new AssertionError(msg, t);
}
}
static void failMFLinkage(MethodHandles.Lookup lookup,
String name,
MethodType capType,
MethodType desc,
MethodHandle impl,
MethodType checked,
Class<?> expectedExceptionType) {
try {
LambdaMetafactory.metafactory(lookup, name, capType, desc, impl, checked);
} catch (Throwable t) {
if (expectedExceptionType.isInstance(t)) {
return;
} else {
String msg = String.format("Unexpected exception: expected %s during linkage for metafactory(%s, %s, %s, %s, %s, %s)",
expectedExceptionType.getName(),
lookup, name, capType, desc, impl, checked);
throw new AssertionError(msg, t);
}
}
String msg = String.format("Unexpected success: expected %s during linkage for metafactory(%s, %s, %s, %s, %s, %s)",
expectedExceptionType.getName(),
lookup, name, capType, desc, impl, checked);
throw new AssertionError(msg);
}
static CallSite succeedAltMFLinkage(MethodHandles.Lookup lookup,
String name,
MethodType capType,
Object[] args) {
try {
return LambdaMetafactory.altMetafactory(lookup, name, capType, args);
} catch (Throwable t) {
String msg = String.format("Unexpected exception during linkage for metafactory(%s, %s, %s, %s)",
lookup, name, capType, Arrays.asList(args));
throw new AssertionError(msg, t);
}
}
static void failAltMFLinkage(MethodHandles.Lookup lookup,
String name,
MethodType capType,
Object[] args,
Class<?> expectedExceptionType) {
try {
LambdaMetafactory.altMetafactory(lookup, name, capType, args);
} catch (Throwable t) {
if (expectedExceptionType.isInstance(t)) {
return;
} else {
String msg = String.format("Unexpected exception: expected %s during linkage for metafactory(%s, %s, %s, %s)",
expectedExceptionType.getName(),
lookup, name, capType, Arrays.asList(args));
throw new AssertionError(msg, t);
}
}
String msg = String.format("Unexpected success: expected %s during linkage for metafactory(%s, %s, %s, %s)",
expectedExceptionType.getName(),
lookup, name, capType, Arrays.asList(args));
throw new AssertionError(msg);
}
}

167
jdk/test/java/lang/invoke/lambda/MetafactorySamReturnTest.java
View File

@ -1,167 +0,0 @@
/*
* Copyright (c) 2014, 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
* @bug 8035776
* @summary metafactory should fail if impl return does not match sam/bridge returns
*/
import java.lang.invoke.*;
import java.util.Arrays;
import static java.lang.invoke.MethodType.methodType;
public class MetafactorySamReturnTest {
static final MethodHandles.Lookup lookup = MethodHandles.lookup();
public interface I {}
public static class C {
public static void m_void(String arg) {}
public static boolean m_boolean(String arg) { return true; }
public static char m_char(String arg) { return 'x'; }
public static byte m_byte(String arg) { return 12; }
public static short m_short(String arg) { return 12; }
public static int m_int(String arg) { return 12; }
public static long m_long(String arg) { return 12; }
public static float m_float(String arg) { return 12; }
public static double m_double(String arg) { return 12; }
public static String m_String(String arg) { return ""; }
public static Integer m_Integer(String arg) { return 23; }
public static Object m_Object(String arg) { return new Object(); }
public static MethodHandle getMH(Class<?> c) {
try {
return lookup.findStatic(C.class, "m_" + c.getSimpleName(), methodType(c, String.class));
}
catch (NoSuchMethodException | IllegalAccessException e) {
throw new RuntimeException(e);
}
}
}
public static void main(String... args) {
Class<?>[] t = { void.class, boolean.class, char.class,
byte.class, short.class, int.class, long.class, float.class, double.class,
String.class, Integer.class, Object.class };
for (int i = 0; i < t.length; i++) {
MethodHandle mh = C.getMH(t[i]);
for (int j = 0; j < t.length; j++) {
// TEMPORARY EXCEPTIONS
if (t[j] == void.class) continue;
if (t[i].isPrimitive() && t[j] == Object.class) continue;
if (t[i] == char.class && (t[j] == int.class || t[j] == long.class || t[j] == float.class || t[j] == double.class)) continue;
if (t[i] == byte.class && (t[j] == short.class || t[j] == int.class || t[j] == long.class || t[j] == float.class || t[j] == double.class)) continue;
if (t[i] == short.class && (t[j] == int.class || t[j] == long.class || t[j] == float.class || t[j] == double.class)) continue;
if (t[i] == int.class && (t[j] == long.class || t[j] == float.class || t[j] == double.class)) continue;
if (t[i] == long.class && (t[j] == float.class || t[j] == double.class)) continue;
if (t[i] == float.class && t[j] == double.class) continue;
if (t[i] == int.class && t[j] == Integer.class) continue;
if (t[i] == Integer.class && (t[j] == int.class || t[j] == long.class || t[j] == float.class || t[j] == double.class)) continue;
// END TEMPORARY EXCEPTIONS
boolean correct = (t[i].isPrimitive() || t[j].isPrimitive())
? t[i] == t[j]
: t[j].isAssignableFrom(t[i]);
MethodType mti = methodType(t[i], String.class);
MethodType mtiCS = methodType(t[i], CharSequence.class);
MethodType mtj = methodType(t[j], String.class);
MethodType mtjObj = methodType(t[j], Object.class);
test(correct, mh, mti, mtj);
testBridge(correct, mh, mti, mti, mtjObj);
testBridge(correct, mh, mti, mti, mtiCS, mtjObj);
}
}
}
static void test(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT) {
tryMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT);
tryAltMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT);
}
static void testBridge(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT, MethodType... bridgeMTs) {
tryAltMetafactory(correct, mh, new Class<?>[]{}, instMT, samMT, bridgeMTs);
}
static void tryMetafactory(boolean correct, MethodHandle mh, Class<?>[] captured,
MethodType instMT, MethodType samMT) {
try {
LambdaMetafactory.metafactory(lookup, "run", methodType(I.class, captured),
samMT, mh, instMT);
if (!correct) {
throw new AssertionError("Uncaught linkage error:" +
" impl=" + mh +
", captured=" + Arrays.toString(captured) +
", inst=" + instMT +
", sam=" + samMT);
}
}
catch (LambdaConversionException e) {
if (correct) {
throw new AssertionError("Unexpected linkage error:" +
" e=" + e +
", impl=" + mh +
", captured=" + Arrays.toString(captured) +
", inst=" + instMT +
", sam=" + samMT);
}
}
}
static void tryAltMetafactory(boolean correct, MethodHandle mh, Class<?>[] captured,
MethodType instMT, MethodType samMT, MethodType... bridgeMTs) {
boolean bridge = bridgeMTs.length > 0;
Object[] args = new Object[bridge ? 5+bridgeMTs.length : 4];
args[0] = samMT;
args[1] = mh;
args[2] = instMT;
args[3] = bridge ? LambdaMetafactory.FLAG_BRIDGES : 0;
if (bridge) {
args[4] = bridgeMTs.length;
for (int i = 0; i < bridgeMTs.length; i++) args[5+i] = bridgeMTs[i];
}
try {
LambdaMetafactory.altMetafactory(lookup, "run", methodType(I.class, captured), args);
if (!correct) {
throw new AssertionError("Uncaught linkage error:" +
" impl=" + mh +
", captured=" + Arrays.toString(captured) +
", inst=" + instMT +
", sam=" + samMT +
", bridges=" + Arrays.toString(bridgeMTs));
}
}
catch (LambdaConversionException e) {
if (correct) {
throw new AssertionError("Unexpected linkage error:" +
" e=" + e +
", impl=" + mh +
", captured=" + Arrays.toString(captured) +
", inst=" + instMT +
", sam=" + samMT +
", bridges=" + Arrays.toString(bridgeMTs));
}
}
}
}