1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17import annotations.BootstrapMethod;
18import annotations.CalledByIndy;
19import java.lang.invoke.CallSite;
20import java.lang.invoke.ConstantCallSite;
21import java.lang.invoke.MethodHandle;
22import java.lang.invoke.MethodHandles;
23import java.lang.invoke.MethodType;
24
25public class TestLinkerMethodMinimalArguments extends TestBase {
26    private static int forceFailureType = 0;
27
28    static final int FAILURE_TYPE_NONE = 0;
29    static final int FAILURE_TYPE_LINKER_METHOD_RETURNS_NULL = 1;
30    static final int FAILURE_TYPE_LINKER_METHOD_THROWS = 2;
31    static final int FAILURE_TYPE_TARGET_METHOD_THROWS = 3;
32
33    @CalledByIndy(
34        bootstrapMethod =
35                @BootstrapMethod(
36                    enclosingType = TestLinkerMethodMinimalArguments.class,
37                    parameterTypes = {MethodHandles.Lookup.class, String.class, MethodType.class},
38                    name = "linkerMethod"
39                ),
40        fieldOrMethodName = "_add",
41        returnType = int.class,
42        parameterTypes = {int.class, int.class}
43    )
44    private static int add(int a, int b) {
45        assertNotReached();
46        return -1;
47    }
48
49    @SuppressWarnings("unused")
50    static int _add(int a, int b) {
51        if (forceFailureType == FAILURE_TYPE_TARGET_METHOD_THROWS) {
52            System.out.println("Throwing ArithmeticException in add()");
53            throw new ArithmeticException("add");
54        }
55        return a + b;
56    }
57
58    @SuppressWarnings("unused")
59    private static CallSite linkerMethod(
60            MethodHandles.Lookup caller, String name, MethodType methodType) throws Throwable {
61        System.out.println("linkerMethod failure type " + forceFailureType);
62        MethodHandle mh_add =
63                caller.findStatic(TestLinkerMethodMinimalArguments.class, name, methodType);
64        switch (forceFailureType) {
65            case FAILURE_TYPE_LINKER_METHOD_RETURNS_NULL:
66                System.out.println(
67                        "Returning null instead of CallSite for " + name + " " + methodType);
68                return null;
69            case FAILURE_TYPE_LINKER_METHOD_THROWS:
70                System.out.println("Throwing InstantiationException in linkerMethod()");
71                throw new InstantiationException("linkerMethod");
72            default:
73                return new ConstantCallSite(mh_add);
74        }
75    }
76
77    public static void test(int failureType, int x, int y) throws Throwable {
78        assertTrue(failureType >= FAILURE_TYPE_NONE);
79        assertTrue(failureType <= FAILURE_TYPE_TARGET_METHOD_THROWS);
80        forceFailureType = failureType;
81        assertEquals(x + y, add(x, y));
82        System.out.println("Failure Type + " + failureType + " (" + x + y + ")");
83    }
84}
85